July 2012 (PDF, 9.9 MB)
Transcript of July 2012 (PDF, 9.9 MB)
Stantec Consulting Services Inc.3017 Kilgore RoadRancho Cordova CA 95670-6150Tel: (916) 861-0400Fax: (916) 861-0430
July 30, 2012
Mr. Jeff Gymer
Department of Toxic Substances Control
Clovis Field Office
1515 Tollhouse Road
Clovis, California 93611-0522
Reference: Errata Letter
Final Human Health Risk Assessment / Feasibility Study / Removal Action Workplan
Former Lodi Manufactured Gas Plant
712 South Sacramento Street, Lodi, California
Dear Mr. Gymer:
Stantec Consulting Services Inc. (Stantec) has prepared this errata letter to rectify two errors in the Final
Human Health Risk Assessment / Feasibility Study / Removal Action Workplan (July 11, 2012) prepared for
the Pacific Gas and Electric Company Former Lodi Manufactured Gas Plant located at 712 South
Sacramento Street in Lodi, California.
The Department of Toxic Substances Control (DTSC) Responsiveness Summary (presented as
Appendix F) erroneously listed ‘May 20 through June 21, 2011’ as the public comment period for the
draft document and the California Environmental Quality Act (CEQA) Notice of Exemption. The
correct range of dates is May 20 through June 21, 2012. These erroneous dates were subsequently
referenced in the text of the document.
Section 4.1.1 of the document described previous investigations pertaining to the former oil tank, and
referenced Section 2.6 for discussion of soil vapor extraction (SVE) pilot testing. Discussion of the
SVE pilot test is in Section 2.4.
At the request of Mr. Rudy Milan, PG&E project manager, Stantec has included replacement pages with this
errata letter. Please affix the following replacement pages to the appropriate pages in the document, and
place this errata letter before the title page.
• Page E-1 of the executive summary (correction of public comment period).
• Page 4-1 (Section 4.1.1 - corrected reference to SVE pilot test discussion).
• Page 7-1 (Section 7.1 – correction of public comment period).
• Appendix F (first two pages of the DTSC responsiveness summary – correction of public comment
period).
If you have any questions regarding this transmittal, please contact the undersigned at (916) 384-0722.
Sincerely,
STANTEC CONSULTING SERVICES INC.
Neil Doran, P.G.
Senior Geologist
Attachments: Replacement Pages (5)
cc: Rudy Millan, PG&E
Tracy Craig, Craig Communications
Max Reyhani, Tierra Pacific Group Incorporated
Final Human Health Risk Assessment / Feasibility Study / Removal Action Workplan Former Lodi Manufactured Gas Plant
712 South Sacramento Street Lodi, California Stantec PN: 185702232.200.0005
July 11, 2012
FINAL HUMAN HEALTH RISK ASSESSMENT / FEASIBILITY STUDY / REMOVAL ACTIONWORKPLANFORMER LODI MANUFACTURED GAS PLANTExecutive Summary
July 11, 2012
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Executive Summary
This Human Health Risk Assessment/Feasibility Study/Removal Action Workplan (HHRA/FS/RAW) has
been prepared for the Pacific Gas and Electric Company (PG&E) site located at 712 South Sacramento
Street in Lodi, California (the site). The objectives of the HHRA/FS/RAW are to establish appropriate
remedial objectives, evaluate remedial alternatives to meet the objectives, and recommend an alternative
for implementation. Site investigation and remediation activities at the site are overseen by the California
Department of Toxic Substance Control (DTSC) under a voluntary cleanup agreement between DTSC
and PG&E executed in October of 2007 (Hazardous Substances Site Cleanup Agreement, Docket No.
HSA-VCA 06/07-182). The public comment period for the draft HHRA/FS/RAW was held from May 20
through June 21, 2012, and the DTSC responsiveness summary is attached.
The 0.73 acre site is a former crude oil manufactured gas plant (MGP) constructed in 1913 by the
Sacramento Natural Gas Company. PG&E assumed possession and operation of the site in 1926, and
gas production operations ceased in 1928. PG&E sold the site in 1958, and re-purchased the site in
2006 for the purpose of environmental investigation and remediation. The site is currently vacant with no
remaining structures associated with historical MGP operations. Surrounding land use is commercial and
residential.
Previous investigations date to the mid-1980s and have documented the presence of MGP-related
chemicals in shallow soils, primarily polycyclic aromatic hydrocarbons (PAHs), petroleum hydrocarbons,
and lead. The majority of impacts are present between the ground surface and 6 feet below ground
surface (ft-bgs). Impacts to shallow soil have been identified beyond the southern property boundary on
property owned by the Lodi Iron Works (LIW), and within South Sacramento Street to the west, primarily
in areas that previously were part of the MGP property prior to the sale to the City of Lodi for street
widening. The vertical and lateral extents of these impacts have been defined. Chemical constituents
detected in groundwater are unrelated to historical MGP operations.
Risk Assessment and Cleanup Goals
The remedial objective is to reduce the concentrations of MGP-related chemicals in site areas (the site,
LIW, and South Sacramento Street), as practicable and feasible, to a point suitable for unrestricted site
use. On behalf of PG&E, a health risk assessment (HRA) was prepared for the site by Iris Environmental.
The HRA determined that none of the chemicals detected in exposed surface soils and soil gas at the site
pose a significant health threat to current off-site residential and commercial populations. Concentrations
of several chemicals in soil require remediation or other forms of risk management in the event that the
site was to be developed in the future for residential use. In the interest of conservative risk-based
decision making, the ‘potential future residential land use’ assumption was extended to the LIW property
and to South Sacramento Street.
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The HRA derived risk-based and ambient-based screening levels that are protective of human health under site-specific exposure scenarios assuming unrestricted future use. These screening levels were adopted as risk-based cleanup goals. Risk-based and ambient-based cleanup goals are summarized in the following table:
Chemical Cleanup Goal (mg/kg)
Polycyclic Aromatic Hydrocarbons 2-Methylnaphthalene 203 Acenaphthylene 3,270 Benzo (g,h,i) perylene 1,635 Fluoranthene 2,180 Naphthalene 2.1 Pyrene 1,635 Benzo(a)Pyrene Equivalent 0.9
Volatile Organic Compounds Benzene 0.51 Ethylbenzene 5.8
Metals Antimony 30 Cobalt 23 Lead 80 Nickel 1,484 Thallium 5.0
Evaluation and Selection of Remedial Technologies
Stantec evaluated three remedial alternatives: 1) no further action, 2) containment and capping in-place, and 3) excavation of impacted soils with off-site landfill disposal. Each alternative was evaluated with respect to effectiveness, implementability, and cost. Excavation was chosen as the preferred remedial alternative due to that method’s effectiveness in achieving the remedial objective of unrestricted site use.
Proposed Remedial Areas
Three general remedial areas are proposed: 1) the site, 2) the LIW property, and 3) South Sacramento Street. Excavation will be completed to the extent practicable and feasible to achieve numerical cleanup objectives. Excavation within South Sacramento Street, in particular, may be affected by the presence of subsurface utilities.
The Site – Proposed remediation of the site includes site-wide excavation to 3 ft-bgs, and focused excavation in several areas to a maximum depth of 14 ft-bgs.
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Lodi Iron Works – Proposed remediation of the LIW site consists of excavating an area approximately 15 feet wide, running the length of the property boundary, to 3 ft-bgs, and focused excavation in two areas to 4.5 ft-bgs.
South Sacramento Street – Proposed remediation of South Sacramento Street consists of excavating to the approximate centerline of the street, running the length of the site, to 2 ft-bgs, and focused excavation of four areas to a maximum depth of 8 ft-bgs.
Post-Remediation Data Collection and Risk Assessment
Confirmation soil samples will be collected during excavation to confirm achievement of proposed cleanup goals, and will be used to calculate post-remediation cumulative human health risk. Stantec anticipates collecting post-remediation soil gas data to confirm the absence of potential risk from vapor intrusion. To the extent that practical constraints limit the ability to fully remove impacted soils, as might occur on South Sacramento Street, the post-remediation risk assessment will provide the technical basis for defining the types of risk management measures that should be put in place to ensure long-term protection of human health and the environment.
FINAL HUMAN HEALTH RISK ASSESSMENT / FEASIBILITY STUDY / REMOVAL ACTION WORKPLAN FORMER LODI MANUFACTURED GAS PLANT Table of Contents July 11, 2012
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Table of Contents
1.0 INTRODUCTION, SITE BACKGROUND, HISTORY, AND DESCRIPTION ..................... 1-1 1.1 DOCUMENT OBJECTIVES ............................................................................................. 1-1 1.2 DOCUMENT ORGANIZATION ........................................................................................ 1-1 1.3 SITE DESCRIPTION, BACKGROUND AND HISTORY ................................................... 1-2 1.4 PHYSICAL CHARACTERISTICS ..................................................................................... 1-3
1.4.1 Surface Features ............................................................................................... 1-3 1.4.2 Surface Water ................................................................................................... 1-3 1.4.3 Regional Geology and Hydrogeology ................................................................ 1-3 1.4.4 Site Geology and Hydrogeology ........................................................................ 1-4 1.4.5 Ecologic and Biologic Resources ...................................................................... 1-4 1.4.6 Cultural Resources ............................................................................................ 1-5
2.0 SUMMARY OF PREVIOUS INVESTIGATIONS .............................................................. 2-1 2.1 EARLY INVESTIGATIONS .............................................................................................. 2-1 2.2 REMEDIAL INVESTIGATION ACTIVITIES – 2008 TO 2009 ............................................ 2-1 2.3 POST-REMEDIAL INVESTIGATION SITE CHARACTERIZATION .................................. 2-2 2.4 SOIL VAPOR EXTRACTION PILOT TESTING ................................................................ 2-3
3.0 REMEDIAL OBJECTIVES AND CLEANUP GOALS ....................................................... 3-1 3.1 REMEDIAL OBJECTIVES ................................................................................................ 3-1 3.2 REGULATORY REQUIREMENTS ................................................................................... 3-1 3.3 HUMAN HEALTH RISK ASSESSMENT .......................................................................... 3-1
3.3.1 Identification of Chemicals of Potential Concern ................................................ 3-1 3.3.2 Exposure Assessment ....................................................................................... 3-2 3.3.3 Risk Characterization Results ............................................................................ 3-2
3.4 PROPOSED SOIL CLEANUP GOALS ............................................................................. 3-3 3.4.1 PAHs ................................................................................................................. 3-3 3.4.2 VOCs ................................................................................................................ 3-4 3.4.3 Metals ............................................................................................................... 3-4
4.0 NATURE AND EXTENT OF CONTAMINATION ............................................................. 4-1 4.1 SOIL .......................................................................................................................... 4-1
4.1.1 Former Oil Tank ................................................................................................ 4-1 4.1.2 Former Oil Supply Line ...................................................................................... 4-2 4.1.3 Former Lampblack Separators .......................................................................... 4-2 4.1.4 Former Storage Holder #3 ................................................................................. 4-2
4.2 SOIL GAS ........................................................................................................................ 4-2 4.3 LIW SITE ......................................................................................................................... 4-3 4.4 SOUTH SACRAMENTO STREET ................................................................................... 4-3
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Table of Contents - continued
5.0 EVALUATION AND SELECTION OF REMEDIAL TECHNOLOGIES ............................. 5-1 5.1 POTENTIAL REMEDIAL ACTIONS ................................................................................. 5-1 5.2 REMEDY EVALUATION AND SELECTION ..................................................................... 5-2
5.2.1 Effectiveness ..................................................................................................... 5-2 5.2.2 Implementability ................................................................................................ 5-2 5.2.3 Cost ................................................................................................................... 5-3
5.3 SELECTION OF REMEDIAL ALTERNATIVE ................................................................... 5-4
6.0 PROPOSED REMEDIAL AREAS .................................................................................... 6-1 6.1 ON-SITE REMEDIATION ................................................................................................. 6-1 6.2 OFF-SITE REMEDIATION – SOUTH SACRAMENTO STREET ...................................... 6-2 6.3 OFF-SITE REMEDIATION – LIW ..................................................................................... 6-2
7.0 REMOVAL ACTION IMPLEMENTATION ........................................................................ 7-1 7.1 PUBLIC PARTICIPATION ................................................................................................ 7-1 7.2 SITE MANAGEMENT ...................................................................................................... 7-1
7.2.1 Site Access ....................................................................................................... 7-1 7.2.2 Site Security ...................................................................................................... 7-2 7.2.3 Traffic Control .................................................................................................... 7-2
7.3 REMEDIATION IMPLEMENTATION ................................................................................ 7-2 7.3.1 Pre-construction ................................................................................................ 7-2 7.3.2 Site Preparation................................................................................................. 7-3 7.3.3 Site Demolition .................................................................................................. 7-4 7.3.4 Excavation ......................................................................................................... 7-4 7.3.5 Backfill and Compaction .................................................................................... 7-5 7.3.6 Site Restoration ................................................................................................. 7-5
7.4 MONITORING AND CONTROL ....................................................................................... 7-6 7.4.1 Noise ................................................................................................................. 7-6 7.4.2 Air ..................................................................................................................... 7-6 7.4.3 Odor .................................................................................................................. 7-7
7.5 STORMWATER MANAGEMENT ..................................................................................... 7-7 7.6 WASTE TRANSPORTATION AND DISPOSAL ............................................................... 7-8
7.6.1 Characteristics and Destination of Soils ............................................................ 7-8 7.6.2 Truck Transportation ......................................................................................... 7-8 7.6.3 Site Traffic Control ............................................................................................. 7-9 7.6.4 Record Keeping............................................................................................... 7-10
7.7 POST-REMEDIATION SITE EVALUATION AND RISK ASSESSMENT ........................ 7-11 7.8 SCHEDULE ................................................................................................................... 7-11
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Table of Contents - continued
8.0 SAMPLING AND ANALYSIS PLAN ................................................................................ 8-1 8.1 CONFIRMATION SAMPLING LOCATIONS ..................................................................... 8-1
8.1.1 On-site Remedial Areas .................................................................................... 8-1 8.1.2 Off-site Remedial Areas – South Sacramento Street ......................................... 8-2 8.1.3 Off-site Remedial Areas – LIW .......................................................................... 8-2
8.2 SAMPLE COLLECTION AND ANALYSIS ........................................................................ 8-3 8.2.1 Sampling Equipment ......................................................................................... 8-3 8.2.2 Equipment Decontamination ............................................................................. 8-3 8.2.3 Sample Handling ............................................................................................... 8-3 8.2.4 Analytical Parameters ....................................................................................... 8-3 8.2.5 Data Evaluation ................................................................................................. 8-4
8.3 WASTE DISPOSAL CLASSIFICATION SAMPLING ........................................................ 8-4
9.0 QUALITY ASSURANCE PLAN ....................................................................................... 9-1 9.1 PROJECT ORGANIZATION AND RESPONSIBILITIES .................................................. 9-1
9.1.1 Project Manager ................................................................................................ 9-1 9.1.2 QA Director ....................................................................................................... 9-1 9.1.3 Health and Safety Officer .................................................................................. 9-1 9.1.4 Field Geologist/Field Supervisor ........................................................................ 9-2
9.2 CALIBRATION OF FIELD EQUIPMENT .......................................................................... 9-2 9.3 SAMPLE HANDLING AND FIELD DOCUMENTATION ................................................... 9-2
9.3.1 Sample Containers ............................................................................................ 9-3 9.3.2 Field Documentation ......................................................................................... 9-3 9.3.3 Sample Chain-of-Custody Record ..................................................................... 9-3 9.3.4 Sample Labels .................................................................................................. 9-4 9.3.5 Sample Collection Log....................................................................................... 9-4
9.4 FIELD QUALITY CONTROL SAMPLES ........................................................................... 9-4 9.4.1 Blind Duplicate Samples .................................................................................... 9-4 9.4.2 Equipment Blanks ............................................................................................. 9-5
9.5 LABORATORY QUALITY CONTROL SAMPLES............................................................. 9-5 9.5.1 Matrix Spike/Matrix Spike Duplicates ................................................................. 9-5 9.5.2 Surrogate Spiking .............................................................................................. 9-5
9.6 DATA REDUCTION, VALIDATION AND REPORTING .................................................... 9-5 9.6.1 Corrective Action ............................................................................................... 9-5 9.6.2 Quality Assurance Reports ................................................................................ 9-6
10.0 HEALTH AND SAFETY PLAN ...................................................................................... 10-1
11.0 REFERENCES .............................................................................................................. 11-1
FINAL HUMAN HEALTH RISK ASSESSMENT / FEASIBILITY STUDY / REMOVAL ACTION WORKPLAN FORMER LODI MANUFACTURED GAS PLANT List of Attachments July 11, 2012
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List of Attachments
LIST OF FIGURES
Figure 1 – Site Location Map Figure 2 – Site Plan Figure 3 – Proposed Remedial Excavation – On-site Areas Figure 4 – Proposed Remedial Excavation – South Sacramento Street Figure 5 – Proposed Remedial Excavation – Lodi Iron Works Figure 6 – Proposed Truck Route from Site to HWY 99 Note: Figures appear at end of report.
LIST OF APPENDICES
Appendix A – Historical Soil, Groundwater, and Soil Gas Chemical Data Appendix B – Applicable or Relevant and Appropriate Requirements Appendix C – Administrative Record List Appendix D – Human Health Risk Assessment (Iris Environmental) – submitted electronically (refer to CD) Appendix E – Extent of Soil Chemical Impacts Above Cleanup Goals Appendix F – DTSC Responsiveness Summary and CEQA Notice of Exemption
FINAL HUMAN HEALTH RISK ASSESSMENT / FEASIBILITY STUDY / REMOVAL ACTION WORKPLAN FORMER LODI MANUFACTURED GAS PLANT List of Acronyms July 11, 2012
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List of Acronyms
ABSL ambient-based screening levels amsl above mean sea level ASTM American Society for Testing and Materials BaPe Benzo(a)Pyrene Equivalent BTEX benzene, toluene, ethylbenzene and xylenes Cal-EPA California Environmental Protection Agency CCTC Central California Traction Company CEQA California Environmental Quality Act COPC chemical of potential concern COC chemical of concern CPAH carcinogenic polycyclic aromatic hydrocarbon DTSC Department of Toxic Substances Control ECR excess cancer risk ESL Environmental Screening Level FS Feasibility Study ft-bgs feet below ground surface GANDA Garcia and Associates HASP health and safety plan HERD Human and Ecological Risk Division HI hazard index HRA health risk assessment HHRA Human Health Risk Assessment LIW Lodi Iron Works mg/kg milligrams per kilogram MGP manufactured gas plant mph miles per hour MS/MSDs matrix spike/matrix spike duplicates MTBE methyl tertiary-butyl ether NFA No Further Action NPDES National Pollutant Discharge Elimination System OSHA Occupational Safety and Health Administration PAHs polycyclic aromatic hydrocarbons PCB polychlorinated biphenyl PCE tetrachloroethene PID photoionization detector PPE personal protective equipment PVC polyvinyl chloride QA/QC quality assurance/quality control
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List of Acronyms
QAP Quality Assurance Plan RAW Removal Action Workplan RBSL risk-based screening level RCRA Resource Conservation and Recovery Act RWQCB Regional Water Quality Control Board SVE soil vapor extraction SWRCB State Water Resources Control Board TCE trichloroethene US EPA United States Environmental Protection Agency VOC volatile organic compound
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1.0 Introduction, Site Background, History, and Description
Stantec Consulting Corporation (Stantec) has prepared this Human Health Risk Assessment/Feasibility Study/Removal Action Workplan (HHRA/FS/RAW) on behalf of Pacific Gas and Electric Company (PG&E) for the former Lodi Manufactured Gas Plant located at 712 South Sacramento Street in Lodi, California (the site). Investigation and remediation activities at the site are overseen by the California Department of Toxic Substances Control (DTSC) under a voluntary cleanup agreement between DTSC and PG&E executed in October of 2007 (Hazardous Substances Site Cleanup Agreement, Docket No. HSA-VCA 06/07-182).
1.1 DOCUMENT OBJECTIVES
The primary purposes of the HHRA/FS/RAW are to establish appropriate remedial objectives, evaluate remedial alternatives to meet the objectives, and recommend an alternative for implementation. A brief description of the recommended alternative is included herein.
1.2 DOCUMENT ORGANIZATION
This document is organized as follows:
Section 1.0 – Introduction, Site Background, History, and Description – Presents an introduction to the HHRA/FS/RAW, describes the site, and summarizes the site history.
Section 2.0 – Summary of Previous Investigations – Summarizes environmental investigations at the site completed to date.
Section 3.0 – Remedial Objectives and Cleanup Goals – Presents remedial action objectives, findings of the human health risk assessment, and proposed soil cleanup goals.
Section 4.0 - Nature and Extent of Contamination – Describes the nature and extent of contamination to environmental media (soil, groundwater, and soil vapor) from chemicals of concern;
Section 5.0 – Evaluation and Selection of Remedial Technologies – Describes potential remedial actions, provides comparative analysis for each alternative in consideration of three criteria (effectiveness, implementability, and cost), and identifies the selected remedial technology.
Section 6.0 – Proposed Remedial Areas – Summarizes remedial areas associated with the site.
Section 7.0 – Removal Action Implementation – Describes implementation of the selected remedial alternative.
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Section 8.0 – Sampling and Analysis Plan – Presents the sampling and analysis plan to ensure that the chosen remedial alternative achieves cleanup goals.
Section 9.0 – Quality Assurance Plan – Describes measures for achieving data quality objectives.
Section 10.0 – Health and Safety Plan – Summarizes elements of the site-specific health and safety plan (HASP) to be used during implementation of the chosen remedial alternative.
Section 11.0 – References – Summarizes technical documents referenced in the HHRA/FS/RAW.
1.3 SITE DESCRIPTION, BACKGROUND AND HISTORY
The site, consisting of approximately 0.73 acre, was formerly a crude oil manufactured gas plant (MGP). The site was constructed in 1913 by the Sacramento Natural Gas Company, located along the west side of the Southern Pacific Railroad line and in the southeast corner of the intersection of South Sacramento Street and Spruce Street in Lodi, California (see Figure 1; Site Location Map). Site activities and transfers of ownership are summarized by the following timeline:
1926: PG&E took over operation of the gas plant and possession of the property, consisting of historical Parcels A and B (see Figure 2). Parcel A was a 25-foot wide strip along the west side of the current property which was later used by the City of Lodi for widening and improvement of South Sacramento Street. The historical dimensions of Parcel B correspond with the current Site dimensions.
1928: PG&E completed the construction of a high pressure gas pipeline into Lodi, and the gas
plant was shut down.
1931 to 1956: The generator and boiler buildings were demolished in 1931, and the gas storage holders were removed in 1934 and 1956.
1958: PG&E sold Parcel A to the City of Lodi and Parcel B to the Central California Traction
Company.
1970s: The site, in its current configuration consisting only of historical Parcel B, was used for warehousing by the California Fruit Exchange.
1988: The Central California Traction Company (CCTC) sold the Site to the Reynolds Packing
Company.
1992: The Reynolds Packing Company sold the Site back to CCTC.
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2006: PG&E purchased the Site from CCTC for the purpose of environmental investigation and remediation.
1.4 PHYSICAL CHARACTERISTICS
The site is a vacant lot located at approximately 47 feet above mean sea level (amsl). The general topographic grade in the vicinity of the site is to the west-southwest, and surface topography at the site is flat. The site is bounded on the west by South Sacramento Street and on the east by Union Pacific Railroad tracks. The property immediately north of the site is occupied by Jorge’s Auto Body, an automobile repair facility, and the property immediately south of the site is a vacant lot owned by Lodi Iron Works (LIW), a metalworking concern. Immediately across Sacramento Street to the west is residential housing. The site is surrounded by a chain-link fence topped with barbed wire, and access to the site is through two gates facing South Sacramento Street. The site and adjacent areas to the north, east, and south are zoned as heavy industrial. The site is currently classified by the City of Lodi as vacant industrial land, developed. The properties west of the site, across South Sacramento Street, are zoned as single-family residential, high-density residential and garden apartments.
1.4.1 Surface Features
Approximately 25 percent of the site is surfaced with degraded asphalt or concrete pads associated with historical site features, and the remainder of the site consists of a dirt surface. The concrete footing corresponding to the former general shop and storeroom (MGP meter house), and partial concrete footings corresponding to the former relief holder #1 and automobile garage are still in place. Historical site features are illustrated on Figure 2. Two trees of unknown variety exist at the site and vegetation exists along sections of the northern and eastern site boundaries.
1.4.2 Surface Water
No surface water bodies exist at the site or in the immediate vicinity of the site. The closest surface water body is an irrigation canal located approximately 1.4 miles west of the Site. The canal originates from the Lodi Lake section of the Mokelumne River, located approximately 1.6 miles north of the site.
1.4.3 Regional Geology and Hydrogeology
The City of Lodi is part of the Eastern San Joaquin Groundwater Basin, within the Central Valley geomorphic province. Lodi is underlain by alluvial soils of the Modesto Formation (Quaternary) eroded from surrounding mountain ranges. The alluvial layers are part of the major aquifer system that runs the length of the valley. The aquifer is recharged by the Mokelumne River which borders the City of Lodi to the north. Groundwater in the City of Lodi ranges from 20 feet below ground surface (ft-bgs) in the
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northwest to 60 ft-bgs in the south (City of Lodi, 2006). Groundwater in the vicinity generally flows towards the south (City of Lodi Water Pollution Control Facility, 2006). Investigations at the site (see Section 1.4.4) identified first-groundwater at approximately 65 ft-bgs. The site is located within the Lodi groundwater investigation area. An investigation of tetrachloroethene (PCE) and trichloroethene (TCE) impacted soil and groundwater has been ongoing throughout northeast and central Lodi since 1989, when the contaminants were first detected in city water supply wells. These contaminants were released primarily from dry cleaning operations, including facilities approximately 3,000 feet north-northwest of the site. The site is located within the southern distal end of the groundwater PCE plume, approximately 600 feet southwest of Lodi well MW-24A and approximately 1,000 feet north-northwest of Lodi well MW-21A. Hydrogeologic information for the area and the site is based on the document entitled, “Report of Third Quarter 2007 Groundwater Monitoring, Central Plume Area, Lodi, California,” (Third Quarter 2007 Report) provided by the California Regional Water Quality Control Board (RWQCB) for the Lodi Central Plume Area (Treadwell and Rollo, 2008). Based on the data provided in the report, the upper groundwater zone in the general area of the site is approximately 60 ft-bgs with groundwater flow to the south with a gradient of approximately 0.003 feet per feet.
1.4.4 Site Geology and Hydrogeology
Investigations performed to date have included soil borings advanced to first-encountered groundwater at approximately 65 ft-bgs. Encountered soils consist primarily of dark yellow to dark brown sand and silty sand, grading to sandy silt, and clay at various depths and locations. Sand is typically fine-grained with localized occurrences of coarser sand- to gravel-sized material. Significant deposits of sandy clay (greater than 5 feet thick) were encountered at various locations.
1.4.5 Ecologic and Biologic Resources
The site is located in an industrialized area of Lodi, is surrounded by a chain-link fence, and bordered on one side by an active rail line. Therefore, the site is not expected to offer significant habitat for terrestrial biota, such as foraging, grazing, or nesting opportunities. The site is located in an active urban area with commercial and industrial operations on adjoining properties, including the active rail line. Due to the nature of this environmental setting, there is minimal open vegetated space; the site is surrounded by developed properties and paved roads. There are no viable terrestrial habitats present to attract wildlife in which the wildlife might forage or reside at the site or in the immediate vicinity.
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1.4.6 Cultural Resources
No significant cultural resources are known to be associated with the site. A cultural resource evaluation conducted in 2007 concluded that the site’s general shop and store room (the former MGP meter house) was not historically significant as assessed under the California Environmental Quality Act (CEQA) guidelines. The former meter house was subsequently demolished in April 2008.
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2.0 Summary of Previous Investigations
The following sections summarize historical investigation activities at the site. The investigations, including methods and findings, are detailed in the Remedial Investigation Completion Report (Stantec, 2010a).
2.1 EARLY INVESTIGATIONS
Ten surface soil samples were collected during two phases of investigation in the mid-1980s and 2006. Elevated concentrations of PAHs, metals, and petroleum hydrocarbons were reported; and benzene, toluene, ethylbenzene and xylenes (BTEX), volatile organic compounds (VOCs), organochlorides, polychlorinated biphenyls (PCBs), or herbicides were not detected above laboratory reporting limits. In September 2007, Garcia and Associates (GANDA) prepared a cultural resources report entitled, “Historical Resources Evaluation Report for the Pacific Gas and Electric Lodi Former Manufactured Gas Plant General Shop and Storeroom/Meter House Building,” (GANDA, 2007). The report concluded that the site’s general shop and store room (the former MGP meter house) was not historically significant as assessed under the CEQA guidelines. The former meter house was demolished in April 2008.
2.2 REMEDIAL INVESTIGATION ACTIVITIES – 2008 TO 2009
Several phases of remedial investigation activities were conducted in 2008 and 2009, and presented in the document entitled, “Remedial Investigation Completion Report,” dated June 8, 2010. Historical sample locations are illustrated on Figure 2. Investigation activities consisted of geophysical investigation, direct-push soil borings for collection of soil samples, passive and active soil gas sampling, and collection of four grab groundwater samples. In addition, two former MGP-era water supply wells were abandoned. Key findings of the remedial investigation are summarized below:
Chemical impacts from PAHs, petroleum hydrocarbons, and lead were widespread in soils between the ground surface and approximately 5 ft-bgs, and a small area of benzene-impacted soils was identified between the ground surface and approximately 12 ft-bgs within a former redwood oil tank that had been buried in-place.
MGP waste residue (lampblack) was observed in soils within the former redwood oil tank, beneath and in the immediate vicinity of the lampblack separators, and beneath the former gas storage holder #3. The occurrence of lampblack was generally limited in vertical and lateral extent.
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Concentrations of volatile constituents in soil gas are unlikely to pose a vapor intrusion risk under the current site conditions, because the site is currently vacant undeveloped land, no detected compounds exceeded residential screening levels, and the nearest resident is located across South Sacramento Street to the west. Elevated reporting limits for naphthalene in four samples warranted additional risk evaluation.
The former redwood oil storage tank was abandoned in-place, and impacted soils have been
observed within the fill material inside the former tank and beneath the tank to a depth of approximately 21 ft-bgs in the immediate vicinity of the former tank. Evidence of chemical impact was not observed in soils beneath the tank between 21 ft-bgs and first-encountered groundwater at 65 ft-bgs, indicating no potential threat to groundwater.
Investigation of a former oil conveyance pipeline indicated the pipeline may still be in-place, and
chemical impacts to soils were identified to 12 ft-bgs at several locations along the pipeline.
Low concentrations of petroleum hydrocarbons consistent with a weathered fuel product were detected in groundwater beneath the site. Based on the chemical composition of constituents in groundwater, the significant vertical separation between impacted soils and first-encountered groundwater (greater than 40 feet), and the low migration potential of MGP-related constituents, these detections appear to be unrelated to historical site operations and warrant no further investigation. Groundwater sampling in the vicinity of the former MGP water supply wells confirms the wells did not act as pathways for migration of contaminants to groundwater.
Off-site investigations suggest chemical impacts attributable to the site extend a short distance
into the adjacent South Sacramento Street to the west, a portion of which was part of the historic MGP property, and across the southern property boundary on to the LIW property.
2.3 POST-REMEDIAL INVESTIGATION SITE CHARACTERIZATION
Following completion of the remedial investigation, PG&E elected to perform additional remedial refinement investigations at the site in July and September 2010. July 2010 investigation activities were described in the document entitled, “Revised Remedial Refinement Work Plan,” dated June 11, 2010 (Stantec, 2010b), and approved by the DTSC in electronic correspondence dated June 22, 2010. The work consisted of additional on-site soil characterization using test pits and soil borings, and additional investigation of soil conditions beneath South Sacramento Street, including investigation of historical gas distribution lines entering South Sacramento Street from the northwest corner of the site. Based on the findings of the July 2010 remedial refinement sampling, additional investigation activities were completed in September 2010, and consisted of soil boring advanced on-site and within South Sacramento Street. Soil chemical data collected in July and September 2010 are presented with historical data in Appendix A.
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Key findings of the remedial refinement investigations are summarized below:
Soil sampling along the northern property boundary revealed the presence of lampblack at one location, and elevated concentrations of PAHs and petroleum hydrocarbons in shallow soils, consistent with conditions elsewhere across the site. Concentrations of PAHs attenuate to below residential screening levels in soil samples collected within approximately 5 feet of the northern property line.
Soil borings advanced in the vicinity of the former oil tank encountered elevated concentrations of petroleum hydrocarbons in sandy soils at approximately 20 ft-bgs, suggesting contamination originating at the former oil tank has migrated laterally within permeable soils. However, concentrations of BTEX and PAHs were below screening levels in these samples.
The former oil supply pipeline, historically used to deliver fuel stock between rail cars and the oil tank, was found to be in-place and intact for a length of approximately 40 feet extending from the eastern fence line. The conduit was observed to be approximately 4-inch-diameter cast iron, located at a depth of approximately 1 ft-bgs. Visual evidence of chemical impact was not observed in soils immediately beneath the pipe, and samples were collected from beneath the line at locations approximately 27 and 40 feet from the fence line. Soil chemical data from these samples do not contain chemical constituents at concentrations above screening levels.
Two historical gas distribution lines entering South Sacramento Street from the former meter house were investigated using an air knife. The lines, consisting of approximately 10-inch-diameter steel, extend approximately 12 feet into South Sacramento Street, and the top of the pipes are located at approximately 2 ft-bgs. Soil samples collected from multiple depths below the pipes did not contain chemical constituents at concentrations above screening levels.
2.4 SOIL VAPOR EXTRACTION PILOT TESTING
Stantec conducted a soil vapor extraction (SVE) pilot test at the site in September and October 2010. The objective of the SVE test was to evaluate the feasibility of using SVE to reduce concentrations of VOCs in soil prior to excavation of the former oil tank and surrounding soils. The pilot test consisted of installing one 6-inch-diameter polyvinyl chloride (PVC) SVE test well within the former oil tank (at the approximate location of SB-6) and six ¾-inch-diameter PVC observation wells at locations surrounding the former tank. Results of the SVE pilot test were presented to the DTSC in the document entitled, “Results of Soil Vapor Extraction Pilot Testing,” dated October 29, 2010 (Stantec, 2010c).
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3.0 Remedial Objectives and Cleanup Goals
The following sections discuss remedial objectives and derivation of cleanup goals.
3.1 REMEDIAL OBJECTIVES
The remedial objective is to reduce the concentrations of MGP-related chemicals in soil and soil vapor in all areas (the site, LIW, and South Sacramento Street) to a point suitable for unrestricted use. This objective will be achieved in all areas to the extent practicable and feasible given the physical and/or logistical constraints associated with remediation such as buried utilities in public rights of way.
3.2 REGULATORY REQUIREMENTS
Applicable or potentially applicable chemical-, action-, and location-specific requirements are summarized in Appendix B. An Administrative Record List identifying documents that were relied upon or considered when selecting the remedial action for the site is included as Appendix C.
3.3 HUMAN HEALTH RISK ASSESSMENT
On behalf of PG&E, a health risk assessment (HRA) was prepared for the site by Iris Environmental (Iris). The results of the HRA have been used to identify areas of the site where remediation, or other forms of risk management, may be appropriate, with the overall goal of long-term protection of human health and the environment. The document entitled, “Draft Final Human Health Risk Assessment, Former Lodi Manufactured Gas Plant, 712 South Sacramento Street, Lodi, California,” (Iris Environmental, 2011) is provided as Appendix D. The HRA was conducted in accordance with applicable United States Environmental Protection Agency (US EPA) and California Environmental Protection Agency (Cal-EPA) risk assessment guidance. The following sections summarize the findings and conclusions from the HRA conducted for the site.
3.3.1 Identification of Chemicals of Potential Concern
Previous site investigation data collected between mid-1980s and 2010 (see Section 2.0) were evaluated for use in the quantitative HRA. Chemicals that were detected above background/ambient levels in soil and all chemicals detected in soil gas were included as chemicals of potential concern (COPCs) in the quantitative analysis. Chemicals detected in soils that are included as COPCs in the quantitative HRA are as follows: various VOCs (including BTEX); various PAHs; and various inorganics. As discussed in the HRA, human health risk associated with petroleum hydrocarbons is assessed by evaluating the risk posed by specific
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components in TPH (i.e., PAHs and BTEX). A complete list of chemicals included in the HRA is presented in Tables 1 and 2 of Appendix D. Chemicals detected in soil gas that are included as COPCs in the quantitative HRA are as follows:
1,1-difluoroethane 1,2,4-trimethylbenzene 1,3,5-trimethylbenzene 2-butanone (MEK) 2-hexanone 4-ethyltoluene Acetone Benzene Carbon disulfide Isopropylbenzene (cumene) Ethanol Dichlorodifluoromethane (Freon 12)
Ethylbenzene Heptane Methyl tertiary-butyl ether (MTBE) Naphthalene Propylbenzene Styrene Tetrachloroethene (PCE) Toluene Trichlorofluoromethane (Freon 11) Trichloroethene (TCE) Total xylenes
These chemicals are summarized in Table 3 of Appendix D.
3.3.2 Exposure Assessment
Under current conditions, the majority of the surface of the site is unpaved, and the primary pathway through which current off-site residents and off-site commercial workers could potentially be exposed to COPCs in soil or soil gas includes the inhalation of volatile constituents that have migrated up through the soil column into the ambient air and through the inhalation of fugitive dusts from the exposed soils at the site. In the future, it is possible that the site could be redeveloped for residential purposes and direct exposure to the COPCs in the surface and subsurface soils could occur. Thus, future on-site residents are assumed to be exposed to COPC in soil across the site through direct contact (i.e., soil ingestion, dermal contact with soil), as well as through the inhalation of particulates/vapors that could be present in the indoor/ambient air.
3.3.3 Risk Characterization Results
With respect to current exposures, the HRA concludes that none of the chemicals detected in exposed surface soils and soil gas at the site pose a significant health risk to current off-site residential and commercial populations. With respect to future site use, the HRA concludes that levels of carcinogenic polycyclic aromatic hydrocarbon (CPAHs), naphthalene, pyrene, cobalt, benzene, fluoranthene, and lead present in soils on the site would require some remediation or other form of risk management (e.g.,
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institutional controls) in the event that the site were to be developed in the future for residential purposes. This conclusion extends to site-related impacts observed at LIW and within South Sacramento Street. Results of the HRA indicate that the estimated health risks associated with COPCs in soil gas via vapor intrusion for future on-site residential populations are at or below acceptable levels (i.e., incremental cancer risks are equivalent to or below the lower end of the acceptable risk range of 1 x 10-6 to 1 x 10-4 and the noncancer HIs are below 1). Estimated health risks are based on existing soil gas data collected during the RI. Soil sampling results have indicated areas of elevated benzene and/or naphthalene concentrations in soils (i.e., at SB-6 and SB-49) where no soil gas data was collected, and these areas are addressed in the in the FS/RAW sections of this document.
3.4 PROPOSED SOIL CLEANUP GOALS
The HRA included as Appendix D derives risk-based screening levels (RBSLs) and ambient-based screening levels (ABSLs) that are protective of human health under site-specific exposure scenarios given unrestricted future residential site use. These screening levels will be used as proposed cleanup goals for soil. The following sections summarize compounds which currently exceed cleanup goals, and the corresponding cleanup goal for that compound. The complete list of RBSLs and ABSLs for all compounds historically detected at the site is included as Table 24 in Appendix D.
3.4.1 PAHs
The proposed soil cleanup goal for Benzo(a)Pyrene Equivalent (BaPe) corresponds to the 95th percentile of in the ambient data set for northern California. Risk-based cleanup goals have been established for the non-carcinogenic PAHs and for naphthalene, as summarized in the following table:
Chemical Cleanup Goal (mg/kg) 2-Methylnaphthalene 203 Acenaphthylene 3,270 Benzo (g,h,i) perylene 1,635 Fluoranthene 2,180 Naphthalene 2.1 Pyrene 1,635 Benzo(a)Pyrene Equivalent 1 0.9 1
_____________ mg/kg = milligrams per kilogram Note: 1 – Ambient-based cleanup goal for carcinogenic PAHs calculated as BaPe.
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3.4.2 VOCs
Risk-based cleanup goals for VOCs are summarized below:
Chemical Risk-Based Cleanup Goal (mg/kg) Benzene 0.51 Ethylbenzene 5.8
3.4.3 Metals
Risk-based cleanup goals for metals are summarized below:
Chemical Risk-Based Cleanup Goal (mg/kg) Antimony 30 Cobalt 23 Lead 80 Nickel 1,484 Thallium 5.0
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4.0 Nature and Extent of Contamination
The following sections describe the extent of chemical impacts to soil originating from historical MGP
operations. Areas of impact are divided into three regions: 1) on-site, 2) LIW property to the south, and 3)
South Sacramento Street to the west. Chemical impacts to soil gas are also summarized in the following
sections, and historical soil and soil gas chemical data are included as Appendix A. As documented in
the RI Completion Report, impacts to groundwater beneath the site appear to be unrelated to historical
MGP operations.
4.1 SOIL
Concentrations of BaPe, naphthalene, petroleum hydrocarbons, and to a lesser extent lead, are
widespread in shallow soils across at the site above cleanup goals (approximately the upper 5 to 6 feet).
Chemical concentrations generally attenuate rapidly with depth. Specific features at the site associated
with elevated chemical impacts, and areas where chemical impacts have been identified at depth, are
summarized below. Chemical concentrations in soil above cleanup goals are illustrated on Figure E-1 in
Appendix E.
4.1.1 Former Oil Tank
A below-ground vessel used to store fuel product was historically located in the north-central portion of
the site (see Figure 2). As depicted on historical documents, the tank was a cylindrical vessel
approximately 15 feet in diameter, and received fuel product from rail cars via a 4-inch-diameter pipeline.
Investigation of this area indicates the tank was buried in-place. Soils within and in the immediate vicinity
of the tank are impacted by elevated concentrations of PAHs, petroleum hydrocarbons, and aromatic
hydrocarbons to a depth of approximately 12 ft-bgs. This area was the subject of the SVE pilot test
described in Section 2.4. Additional chemical impacts have been identified in a zone between
approximately 20 and 22 ft-bgs beneath and in the immediate vicinity of the former oil tank. Two
detections of naphthalene and one detection of ethylbenzene from this deep soil interval (20 to 22 feet
bgs) slightly exceed their respective risk-based cleanup goals.
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4.1.2 Former Oil Supply Line
As described in Section 2.5.4, previous investigations have identified the presence of a 4-inch-diameter steel conduit buried approximately 1.5 ft-bgs (see Figure 2). The pipeline conveyed fuel product between rail tank cars and the former oil tank. Approximately 40 feet of conduit remains in-place, and no evidence of chemical impact from the pipe were reported during investigation activities. Soil borings advanced at several locations along the pipeline have identified elevated concentrations of PAHs, petroleum hydrocarbons, and lead at depths ranging from 5 to 12 ft-bgs.
4.1.3 Former Lampblack Separators
Two above-ground former MPG waste receptacles (identified on drawings as ‘former lampblack separators’) were historically located in the southeast quadrant of the site. Investigation of this area has revealed the presence of a 1.5-foot-thick layer of concrete overlain by 1 to 6 inches of surface soils. Lampblack was identified between 5 and 5.5 ft-bgs in one of three soil borings (SB-8) advanced beneath the former separator, and elevated concentrations of petroleum hydrocarbons and PAHs have been identified to 6.5 ft-bgs. Investigation of soils immediately west of the lampblack separators identified elevated concentrations of PAHs to 9 ft-bgs. Data from additional soil borings advanced in this area suggest these impacts are limited in extent.
4.1.4 Former Storage Holder #3
Former gas storage holder #3 was historically located in the southwest quadrant of the site. The footprint of the holder extended beyond the current property boundary into South Sacramento Street, across the parcel of land sold to the City of Lodi in 1958. Soil borings advanced beneath the former gas holder encountered approximately 1 to 6 inches of surface soils underlain by concrete ranging in thickness from 1 to 3 feet. This concrete is likely the footing for the former gas holder. Soils beneath the former gas holder are impacted by lampblack and elevated PAHs to depths of 4 ft-bgs.
4.2 SOIL GAS
Soil gas conditions beneath the site have been characterized during the remedial investigations using passive and active soil gas sampling methods, and estimated health risks associated with COPCs in soil gas via vapor intrusion for future on-site residential populations are at or below acceptable levels as concluded in the HHRA based on soil gas data collected during the RI. As described in Section 3.3.3, soil gas samples were not collected from areas with the highest concentrations of VOCs and CPAHs in soil (i.e., at SB-6 and SB-49). Soil gas conditions will be evaluated following remediation.
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4.3 LIW SITE
Chemical impacts consistent with those observed at the site have been identified in shallow soils on the LIW property to the south. In general, these concentrations are present in surface soils, attenuate to below screening levels between the ground surface and 3 ft-bgs, and are present within 15 feet of the fence line.
4.4 SOUTH SACRAMENTO STREET
Investigation of soils beneath South Sacramento Street has identified chemical impacts to soils consistent with historical MGP operations. In general, shallow soils within the area of the street historically part of the site (roughly to the current centerline of South Sacramento Street) contain shallow chemical impacts from elevated PAHs, petroleum hydrocarbons, and lead. The impacts are consistent with shallow soil conditions elsewhere on the site. Deeper impacts (to 6 ft-bgs) have been identified at locations in the center of the street, adjacent to the historical gas holders. Investigation beneath the sidewalk along the western side of South Sacramento Street identified one concentration of BaPe (1.86 mg/kg in the sample from 0.5 ft-bgs at SB-27) above the ambient-based cleanup goal of 0.9 mg/kg; however, this concentration is within the range of concentrations in the ambient data set for northern California. Further, no visual or olfactory evidence of MGP impacts were observed at SB-27 and investigation data indicates attenuation of MGP-related chemicals with distance from the site Previous investigations identified two historical gas distribution pipelines extending from the former general shop and store room on the site (see Figure 2). Remedial investigations determined that these pipelines were historically severed approximately 15 feet laterally into the Street from the site. Underlying soils have not been impacted.
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5.0 Evaluation and Selection of Remedial Technologies
The purpose of this section of the HRA/FS/RAW is to identify and compare possible removal action alternatives that may best achieve the remedial objectives discussed in Section 5.1. The removal action alternatives were screened and evaluated on the basis of effectiveness, implementability, and cost criteria.
5.1 POTENTIAL REMEDIAL ACTIONS
Possible response actions to address COPCs in soil include excavation and off-site disposal, capping in-place, and institutional controls. These response actions have been assembled into candidate removal alternatives for the site. Screening of several technology types with respect to effectiveness, implementability, and cost was conducted to select removal actions for further evaluation. The three possible removal actions are described below.
Alternative 1 – No further action. As required by the DTSC, the ‘No Further Action’ (NFA) alternative has been included to provide a baseline for comparisons among other remedial alternatives. The NFA alternative would not require implementing any measures at the site and no costs would be incurred.
Alternative 2 – Containment/capping in-place. This alternative consists of capping the surface of the impacted areas with asphalt, concrete, or similar permeable/semi-permeable material. The cap would minimize the potential for site users to come into contact with the contaminated soil. If capping is selected, the entire site and LIW, representing approximately 0.86 acre of affected soil, would be covered. This method would require a land use restriction to be executed between DTSC and pertinent property owners to ensure that the cap is operated and maintained and that future uses of the affected properties are consistent with the operation and maintenance of the cap. An operation and maintenance plan would be submitted and approved by DTSC which specifies the operation and maintenance requirements and provides financial assurance for future operation and maintenance of the cap.
Alternative 3 – Excavation and off-site disposal of soils. The excavation/off-site disposal alternative consists of removing and transporting impacted soil to an appropriate, permitted off-site facility for disposal. Excavation includes using loaders, backhoes and/or other appropriate equipment. Excavation operations will generate dust emissions. Suppressant, water spray, and other forms of dust control may be required during excavation, and workers may be required to use personal protective equipment (PPE) to reduce exposure to COPCs. Sloping excavation sidewalls may result in increased volume of soil requiring excavation.
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Confirmation soil sampling and analysis would be conducted to verify that cleanup criteria were met.
5.2 REMEDY EVALUATION AND SELECTION
5.2.1 Effectiveness
Evaluation of effectiveness refers to the potential for a remedy to achieve the remedial objectives for the site:
Remedial Alternative #1 – No further action. Because current site conditions preclude unrestricted site use, the ‘no further action’ alternative does not effectively achieve the remedial objectives.
Remedial Alternative #2 – Containment/capping in-place. Under this alternative, significant technical controls and features would be required to allow residential use; therefore, such use would not be considered ‘unrestricted’.
Remedial Alternative #3 – Excavation and disposal of soils. The proposed excavation would remove soils impacted above risk-based and ambient-based screening goals protective of unrestricted site use. Therefore, the excavation alternative achieves the remedial objectives for the site.
5.2.2 Implementability
Implementability refers to the technical feasibility for a remedy to be implemented.
Remedial Alternative #1 – No further action. This remedy can be readily implemented.
Remedial Alternative #2 – Containment/capping in-place. This remedy can be readily implemented. Minor grading and site preparation would be required in advance of paving.
Remedial Alternative #3 – Excavation and disposal of soils. This remedy can be readily implemented.
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5.2.3 Cost
The estimated cost to implement each of the three remedial alternatives is summarized in the following table.
Remedial Alternative Associated Tasks Estimated Cost #1 – No Further Action - No Associated Tasks - $0 Total Estimated Cost of Remedial Alternative #1 $0 #2 – Containment/Capping In-Place
Installation of Passive Vapor Abatement System and Vapor Barrier
$80,000
Paving the Site $30,000 Draft/Record Land Use Restriction $10,000 Annual Inspection and Maintenance of Cap (30 years)
$120,000
Total Estimated Cost of Remedial Alternative #2 $240,000 #3 – Excavation and Disposal of Soils – Site and LIW
Excavation, Removal and Disposal of Soils
$925,000
Dust and Odor Controls $90,000 Import Clean Fill, Backfill and Compaction
$175,000
Excavation and Disposal of Soils – South Sacramento Street
Excavation, Removal and Disposal of Soils
$200,000
Dust and Odor Controls $25,000 Import Clean Fill, Backfill and Compaction
$45,000
Street Paving and Infrastructure Restoration
$75,000
Shoring $50,000 Oversight, Monitoring and
Confirmation Sampling and Testing $250,000
Post-Remediation Soil Gas Workplan, Sampling, Health Risk Assessment and Closure Report
$150,000
Total Estimated Cost of Remedial Alternative #3 $1,985,000
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5.3 SELECTION OF REMEDIAL ALTERNATIVE
Stantec reviewed the possible remedial alternatives by independently evaluating each method in terms of effectiveness, implementability, and cost. The most important comparison criterion was effectiveness, measured as the ability for a particular remedy to achieve the remedial objectives for the site. As presented in Section 5.1, the primary remedial objective for the site is to reduce the concentrations of MGP-related chemicals to numerical cleanup goals for unrestricted site use to the extent practicable and feasible in consideration of logistical constraints such as buried utilities in public rights of way. Although each of the three remedial alternatives is technically feasible, obtaining unrestricted designation cannot be accomplished by the NFA or the capping in-place alternatives. Therefore, the proposed remedial method for the site is excavation and disposal of impacted soils. In addition to being effective in likely achieving the unrestricted land use designation, excavation and disposal is deemed to be relatively cost-effective for a site of this size (0.73 acre), where the majority of the chemical impact contributing to excess risk under a future unrestricted use scenario is present in shallow soils.
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6.0 Proposed Remedial Areas
The following sections describe the three remedial areas: 1) the site, 2) the off-site area to the west (South Sacramento Street), and 3) the off-site area to the south (LIW). The extent and depth of proposed excavation areas are illustrated on Figure 3 through 5. The remedial activities described below are expected to remove the majority of COPCs present in soils at concentrations above numerical cleanup goals. The proposed excavation will also remove the majority of TPH-impacted soils present in shallow soils beneath the three remedial areas.
6.1 ON-SITE REMEDIATION
The on-site remedial area consists of the entire 0.73-acre site, which will be excavated to 3 ft-bgs. Several proposed focused excavations are illustrated on Figure 3 and summarized below:
Remedial Area Designation Depth/Description Entire Site SITE Excavate entire site to 3 ft-bgs, with additional limited
excavation to approximately 4 ft-bgs at select locations (see Figure 3)
Former Oil Tank OT Excavate former oil tank to 14 ft-bgs Oil Supply Line OSL1 Remaining oil supply line (approximately 40 linear feet)
will be removed when entire site is excavated to 3 ft-bgs OSL2 Excavate area of historical soil boring SB-23 to 13 ft-bgs OSL3 Excavate area along eastern property line to 7 ft-bgs
Lampblack Separators LBS Excavate lampblack separators and adjacent area to the south to 7 ft-bgs
Storage Holder #3 – On-site Area SH3A Excavate beneath former storage holder #3 to 5 ft-bgs Test Pit #2 TP2 Excavate area of investigation test pit #2 to 10 ft-bgs Test Pit #11 TP11 Excavate area of investigation test pit #11 to 10 ft-bgs
As discussed in Section 4.1.1, during previous investigations chemical impacts have been identified in a zone between approximately 20 and 22 ft-bgs beneath and in the immediate vicinity of the former oil tank (remedial area OT). The impacts are primarily TPH with naphthalene and ethylbenzene in a few samples at concentrations slightly above cleanup goals. Considering the depth of the contaminants and the absence of groundwater impacts, these impacted soils will remain in place. Leaving these soils in place does not adversely affect the remedial objective of unrestricted Site use. Post-remediation soil vapor samples will be collected following remediation to confirm that the remedial objectives have been achieved.
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6.2 OFF-SITE REMEDIATION – SOUTH SACRAMENTO STREET
Proposed remediation within South Sacramento Street consists of removing shallow soils to 2 ft-bgs and completing additional focused excavations. Remedial areas are summarized below, and illustrated on Figure 4. The proposed excavation will be completed to the extent practicable and feasible given site constraints such as locations of utilities and placement of shoring. As described in Section 4.4, the concentration of BaPe exceeded the ambient-based cleanup goal in one sample collected from beneath the sidewalk west of South Sacramento Street (0.5 ft-bgs at SB-27). Due to the relatively low concentration of 1.86 mg/kg compared to the ambient-based cleanup goal of 0.9 mg/kg, the lack of visual or olfactory evidence of MGP impacts, the demonstrated attenuation of MGP-related chemicals with distance from the site, and the absence of MGP-related chemicals from additional samples collected beneath the western sidewalk, Stantec proposes excluding SB-27 from the South Sacramento Street remedial area.
Remedial Area Designation Depth/Description South Sacramento Street SSS1 Excavate adjacent section of street to 2 ft-bgs
Historical Gas Transmission Pipes SSS2 Removal of historical gas transmission pipes extending into South Sacramento Street
Storage Holder #2 SSS3 Excavate adjacent to former storage holder #2 to 8 ft-bgs
Storage Holder #3 – Off-site Area SH3B Excavate beneath former storage holder #3 to 5 ft-bgs
SSS4 Excavate adjacent to former storage holder #3 to 7 ft-bgs
6.3 OFF-SITE REMEDIATION – LIW
Proposed remediation at LIW consists of excavating soils within 25 feet of the shared property line to 3 ft-bgs, with focused excavations to 4.5 ft-bgs. Remedial areas are summarized below, and illustrated on Figure 5.
Remedial Area Designation Depth/Description LIW – Shallow Soil LIW1 Excavate adjacent to property line to 3 ft-bgs
LIW2A/2B Excavate to 4.5 ft-bgs.
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7.0 Removal Action Implementation
The following sections describe work tasks associated with remedial excavation of the site, LIW, and
within South Sacramento Street. Detailed procedures relating to remedial excavation, including health
and safety procedures, will be presented in a forthcoming remediation work plan.
7.1 PUBLIC PARTICIPATION
In accordance with the requirements of the VCA, a draft Notice of Exemption was prepared by the DTSC
for the implementation of the RAW in order to satisfy California Environmental Quality Act (CEQA)
requirements. A public comment period for the draft HHRA/FS/RAW and CEQA Notice of Exemption was
held between May 20 and June 21, 2012. The purpose of the public comment period was to provide the
public with an opportunity to review information regarding the project and to solicit public comments on
the adequacy of the draft HHRA/FS/RAW and appropriateness of the notice of exemption. DTSC
received one comment, which was addressed. The DTSC responsiveness summary and final Notice of
Exemption are attached as Appendix F.
A Public Participation Plan (PPP) was prepared in 2008 as a means to assist the DTSC in assessing the
potential level of community interest in the investigation and mitigation process. The PPP provided a
thumbnail sketch of the Site and the community in which it is located, identified community interest and
concern in investigation and cleanup activities, and recommended future public participation activities to
facilitate community input into DTSC's decision-making process for the Site.
Throughout the project, interested parties will be able to review project documents at the designated
repository; the Lodi Public Library located at 201 West Locust Street, Lodi, California 95240.
7.2 SITE MANAGEMENT
During remediation, site management activities will be implemented as described in the following
sections.
7.2.1 Site Access
Site access will be limited to authorized personnel, including DTSC staff. A sign-in log will be maintained
at the site entrance for documentation of all on-site personnel. Times and locations for site access shall
be authorized by PG&E or its representative.
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7.2.2 Site Security
The site is currently surrounded by a chain-link fence topped with barbed wire with two locking gates facing South Sacramento Street. During excavation activities, efforts will be made to preserve the existing fence. If the fence must be removed during site work, temporary fencing will be installed for the duration of the project, and replaced with a permanent enclosure following excavation and backfill activities. During loading operations, each open gate will be monitored by project personnel. During excavation at LIW, the fence between the site and the adjacent property will be removed, and the work area will be surrounded with temporary fencing to create an exclusion zone. Similar measures will be implemented during work within South Sacramento Street.
7.2.3 Traffic Control
Traffic control measures will be implemented during soil removal and site restoration activities. A flagman will be posted at the site entrance and exit to ensure safe and uninterrupted flow of traffic in and out of the site. Appropriate signage will be installed along South Sacramento Street and at key intersections, and maintained for the duration of the project. Trucks and equipment can access the site and the LIW property from South Sacramento Street. Trucks will be loaded on-site to the extent feasible, and additional staging and/or loading will be conducted on the LIW property under agreement with the property owner. During excavation of South Sacramento Street, trucks and equipment will be staged on-site and loading will be completed on-site to the extent possible. The proposed trucking route to and from California Highway 99 is illustrated on Figure 6, but may be revised during the project planning stage based on input from the City of Lodi and the selected transportation contractor. Prior to the start of work, a traffic control plan will be prepared in accordance with the Work Area and Traffic Control Handbook (WATCH; California Joint Utility Traffic Control Committee 1996) and/or local regulatory guidelines, as required.
7.3 REMEDIATION IMPLEMENTATION
Site remediation is expected to be performed during the summer months, when rainfall in the area is typically rare to non-existent. Stantec estimates that site preparation, excavation, confirmation sampling, and backfill/compaction of the three remedial areas can be completed in approximately 12 to 16 weeks. The general sequence of work from pre-construction to removal of impacted soil, site restoration, and site cleanup is described below.
7.3.1 Pre-construction
The following pre-construction activities will be performed:
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PG&E will complete public notification tasks as required by DTSC;
All applicable and necessary permits will be obtained, including grading and encroachment permits;
Soils scheduled for excavation will be profiled for disposal at appropriate disposal facilities;
A survey of the existing site features and location will be conducted to satisfy the City of Lodi and San Joaquin County grading permit requirements and to ensure proper restoration after excavation activities are completed;
Existing utility lines that will be encountered during the work will be identified and confirmed. Any requirements, specifications and/or permits pertaining to the affected utilities will be obtained from the utility owners;
Soil quality records of import fill sources will be reviewed to determine suitability. If the existing records are insufficient, additional soil testing will be performed in general accordance with DTSC advisory criteria for evaluating imported fill materials (DTSC, 2001a);
A traffic control plan will be prepared in accordance with the WATCH (American Public Works Association, 2006) and/or local regulatory requirements, as appropriate; and,
Existing soil vapor monitoring and extraction wells will be abandoned in accordance with San Joaquin County Department of Environmental Health requirements.
7.3.2 Site Preparation
The following site preparation activities will be conducted prior to the removal action:
A pre-excavation video of the area will be recorded to document existing site and vicinity conditions;
Remaining brush and trees will be removed from the perimeter of the site, and from the LIW property adjacent to the common property line;
The Exclusion, Decontamination, and Support Zones will be identified and clearly marked. The Exclusion Zones will include all areas of excavation, contaminated soil staging, and truck loading. The Decontamination Zones will be located immediately adjacent to the Exclusion Zones for purposes of decontaminating personnel, equipment, and vehicles exiting the Exclusion Zones. The Support Zones will be located within the designated work areas, but outside the Exclusion and Decontamination Zones. The Support Zones will be used to temporarily store equipment, vehicles, and personnel; and,
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Temporary facilities and utilities (i.e., sanitation facilities, power, lighting, telephones, etc.) will be installed as necessary for use by the on-site personnel.
7.3.3 Site Demolition
Concrete and asphalt will be removed and disposed of at a recycler. The south-central portion of the site is partially covered by degraded asphalt, and concrete footings, foundations, or supports have been identified at the following locations:
The former general shop and meter house in the northwest corner of the site (foundation); The former relief holder #1 (partial footing); The former garage building north of the relief holder (partial footing); The former lampblack separators (footing); and, The former storage holder #3 (footing).
If additional concrete is discovered during excavation activities, it will be segregated for recycling as practical.
7.3.4 Excavation
Excavation areas at the site, South Sacramento Street, and LIW are illustrated on Figures 3 through 5, respectively. Prior to the start of the excavation, all health and safety, noise, and dust control equipment and materials will be prepared and positioned for immediate use, as necessary. Dust and noise monitoring will be conducted during work activities and controls will be used as appropriate to minimize any impacts to existing facilities, on-site workers, and the public. It is anticipated that the majority of materials will be direct-loaded into trucks. In the event that stockpiling of soil is necessary, 10-mil plastic sheeting or plywood will be placed beneath stockpiles. All stockpiled soil will also be covered with 10-mil plastic sheeting and secured with sandbags and/or other anchoring devices. The following sections describe proposed remediation activities and one potential sequence of events. However, the actual approach and sequence of events may be modified during the design, planning, and permitting stages of the project.
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Excavation of South Sacramento Street
Remediation of South Sacramento Street will be completed first to allow the site to be used for staging of equipment and loading of soils. Following installation of necessary traffic controls and access restrictions, remedial areas SSS1, SSS2, and SH3B will be excavated. Areas SSS3 and SSS4 will then be excavated and shoring installed during excavation to protect the integrity of South Sacramento Street to the west. Utilities encountered during excavation will be protected and left in-place. The South Sacramento Street excavations will be immediately sampled, backfilled and compacted, and resurfaced to return the street to unimpeded use and to allow access for on-site remediation. Excavation of the Site and LIW
Excavation of the site and LIW will generally be completed simultaneously, as both remedial areas will initially be excavated to a depth of 3 ft-bgs. Based on the shallow depth of excavation, shoring is not anticipated. Loading and/or stockpiling operations will be conducted on the site, with material left in-place at the two driveways entering the site from South Sacramento Street to allow entrance and egress. Following removal of shallow soils, the deeper excavations will be completed. Sidewalls of excavations extending deeper than 5 feet from the excavated site grade will be benched or sloped back to allow safe working conditions. Remediation areas in the southern portion of the site (SH3A, TP11, LBS, SB64 and SB9) will be completed and backfilled first, to allow room on the southern half of the site during the deeper excavations in the northern half. Backfill and compaction of the LIW excavation will also be completed during this time.
7.3.5 Backfill and Compaction
Following receipt of confirmation sample results which confirm that the cleanup goals have been met, the site will be backfilled to pre-existing grade with imported engineered fill materials and compacted to 90 percent relative compaction per Modified Proctor (American Society for Testing and Materials or ASTM standard D 1557 [2007]), unless otherwise specified in the City of Lodi or San Joaquin County grading permit. Prior to bringing fill material on-site, Stantec will review the soil quality data of the source material. All imported fill will be free of contamination and debris. Organic compound concentrations will be below detectable limits, and metal concentrations will be at typical background levels. Backfill soil sampling will be conducted according to the “Simple Random Sampling” procedure described in Test Methods for Evaluating Solid Waste, Physical/Chemical Methods (SW-846; USEPA, 2000).
7.3.6 Site Restoration
Following backfilling and compaction of the remedial excavations, the upper 4 inches of the site and the LIW excavation will be finished with aggregate base rock to minimize wind disturbance of underlying soils. South Sacramento Street will be resurfaced in accordance with encroachment and grading permit requirements.
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7.4 MONITORING AND CONTROL
Control measures presented in this section will be implemented to identify, monitor, and mitigate noise, dust, vapors, and odors. Appropriate mitigation measures for each type of nuisance will be available at all times during excavation activities. The purpose of the control measures is to protect the health and safety of on-site workers and the general public and to prevent nuisance conditions.
7.4.1 Noise
Any noise above 85 decibels will be considered a noise source. Activities such as heavy vehicle and equipment operation, concrete or asphalt saw-cutting, generator operation, and excavation equipment operation may be noise sources. Manufacturer equipment specifications will be reviewed for noise levels produced by any on-site equipment. If necessary, alternative equipment may be selected to reduce noise levels. Potential noise receptors could include on-site workers, nearby homeowners and business operations, pedestrians near the site, and vehicle drivers passing the site. Noise monitoring will occur within the Exclusion Zone and at the perimeter of the site, and will be conducted using a sound level meter. The monitoring frequency will be determined according to the type and location of operations. Appropriate worker hearing protection will be required for any anticipated noise level above 85 decibels for eight hours of exposure (time-weighted average). Also, workers will be required to have appropriate hearing protection at all times within the Exclusion Zone. Workers shall have completed a hearing conservation program that meets the requirements of California Code of Regulations, Title 8, Section 5097. Noise mitigation measures will be specified based on the results of the noise monitoring. If the noise level exceeds 85 decibels outside the Exclusion Zone, mitigation measures may include one or more of the following:
The work area will be expanded such that the noise level is below 85 decibels at the perimeter; Mufflers will be used on selected equipment to mitigate noise; Sound barriers will be placed around the work area; Alternate equipment will be specified; and, Operation times will be modified.
7.4.2 Air
Land use in the vicinity of the site is commercial and residential. Perimeter air monitoring will be performed during the excavation activities to confirm that chemical of concern (COC) in dust and/or organic vapors do not migrate off-site at unacceptable levels. The perimeter air data will be used in
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conjunction with real-time particulate data to make operational decisions including measures for dust control, PPE, and work stoppage. Air monitoring will be conducted throughout the excavation and loading activities and will consist of real-time data collection for particulates (MiniRAM) and organic vapors (photoionization detector [PID]), and laboratory analysis of data collected from the perimeter high volume air sampling stations and/or other appropriate equipment for the sampling media. The remediation work plan will provide acceptable levels for the field activities based on site-specific data and exposure calculations. The MiniRAM and PID data will be used to determine when engineering controls are required to prevent unacceptable dust and/or organic vapor levels. If engineering controls are not capable of sustaining acceptable levels in worker areas and/or at the site perimeter, the field data will be used to justify work stoppage until site conditions improve.
7.4.3 Odor
Engineering controls will be applied during excavation to minimize objectionable odors. Should odor mitigation be deemed necessary during excavation, an odor suppressant will be applied directly to soils during excavation and loading. Every effort will be made to not stockpile odorous soils on-site, but rather to load such soils directly to expedite removal from the site.
7.5 STORMWATER MANAGEMENT
All storm-water management systems shall comply with the procedures outlined in US EPA guideline manual Processes, Procedures and Methods to Control Pollution Resulting from All Construction Activity (US EPA, 1973). Because this project will result in a disturbance of less than one acre, the project does not require a State Water Resources Control Board (SWRCB) National Pollutant Discharge Elimination System (NPDES) General Permit for Storm Water Discharges Associated with Construction Activity (General Permit). As defined by SWRCB Order No. 99-08-DWQ, a General Permit is not required for “construction projects that result in disturbance of less than one acre of total land area.” The purpose of implementing storm water management measures is to prevent surface water from entering or exiting the work area. Prior to the start of excavation activities, the storm water receptacles (e.g., sumps, storm drains) at and near the site will be located and protected to prevent an unauthorized release. Temporary controls will include placing waterproof covers over receptacles or berms around receptacles. These temporary controls will be inspected daily to ensure proper placement and integrity. During excavation activities, berms (e.g., sandbags) will be placed or constructed around the excavation area to prevent water run-on or run-off. All soil piles (if any) shall be covered with plastic and surrounded by berms. If dust control is applied (e.g., water), precautions will be taken to prevent ponding and/or off-site migration of the dust control agent.
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7.6 WASTE TRANSPORTATION AND DISPOSAL
The objective of the waste transportation and disposal program is to handle, transport, and dispose of all materials according to the pertinent regulations and in an environmentally sound and safe manner. The procedures have been developed in accordance with the Guidance for Developing Transportation Plans for Removal or Remedial Actions (DTSC, 2001b).
7.6.1 Characteristics and Destination of Soils
The majority of site soils are expected to receive a Class II waste designation. Approximately 15 percent of soils will qualify as Class I non-Resource Conservation and Recovery Act (RCRA) hazardous waste due to elevated concentrations of lead and/or benzene. Soils to be excavated will be profiled for disposal before excavation. As a hazardous waste generator, PG&E will secure a temporary EPA Identification Number from the USEPA for proper management of the hazardous waste. Compliance with the DTSC requirements of hazardous waste generation, temporary on-site storage, transportation, and disposal is required. Any container used for on-site storage will be properly labeled with a hazardous waste label, and transported off-site for disposal within 90 days. Any shipment of hazardous wastes in California will be transported by a registered hazardous waste hauler under a uniform hazardous waste manifest. ‘Land ban’ requirements will also be followed, as necessary. Any shipment of non-hazardous waste in California will be transported under a non-hazardous waste manifest or bill-of-lading. Soils classified as Class II (non-hazardous) will be transported to Allied Waste’s Forward Landfill in Manteca, California, or to Waste Management’s Altamont Landfill in Livermore, California, for disposal. Soils classified as Class I (California hazardous) waste will be transported to Waste Management’s Kettleman Hills, California facility, or to Clean Harbors’ Buttonwillow, California facility for disposal.
7.6.2 Truck Transportation
Approximately 5,800 cubic yards (8,800 tons) of soil will be removed from the site, South Sacramento Street, and LIW. Assuming each truck carries 18 tons, approximately 490 truck trips will be required to off-haul impacted soils. Stantec estimates that an average of 24 trucks can be loaded each day. All permitted disposal facilities operate a certified weight station at their facility. As such, each truck will be weighed before off-loading its payload. Weight tickets or bills of lading will be provided to the removal action subcontractor after all the soil has been shipped off-site. Below is a summary of the truck route from the site to each of the two proposed disposal facilities. The truck route to and from Highway 99 is illustrated on Figure 6.
AW Forward Landfill –The landfill facility is located in Manteca, approximately 26 miles south of the site. Trucks will proceed south on Highway 99.
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WM Altamont Landfill – The landfill facility is located in Livermore, California, approximately 48 miles southwest of the site. Trucks will proceed south on Highway 99; west on Highway 4; south on Interstate 5; and west on Highway 205/580.
CWM Kettleman Hills –The landfill facility is located in Kettleman Hills, approximately 200 miles south of the site. Trucks will proceed south on Highway 99; f west on Highway 4; and south on Interstate 5..
CH Buttonwillow Landfill – The landfill facility is located in Buttonwillow, California, approximately 230 miles south of the site. Trucks will proceed south on Highway 99; west on Highway 4; and south on Interstate 5
The truck routes described above may be modified during project planning based on input from the City of Lodi and the selected transportation contractor. Transportation of soils is expected to occur during the week (Monday through Friday) during typical business hours (7 AM to 5 PM). Before leaving the site, each truck driver will be instructed to notify the site manager. Each truck driver will be provided with a Uniform Hazardous Waste Manifest, Non-Hazardous Waste Manifest, or bill-of-lading and the cellular phone number for the site manager. It will be the responsibility of the site manager to notify DTSC of any unforeseen incidents. Each truck driver will be instructed to use the freeway Call Box System (if available), a cellular telephone and/or their radio dispatch system to call for roadside assistance and report roadside emergencies.
7.6.3 Site Traffic Control
As described in Section 8.2.4, trucks will be loaded on the PG&E site, which is accessed via two gates located on South Sacramento Street. A flag person will be located at the site to assist the truck drivers to safely drive onto the site. Transportation will be coordinated in such a manner that at any given time, on-site trucks will be in communication with the site trucking coordinator. In addition, all vehicles will be required to maintain slow speeds (i.e., less than 5 miles per hour or mph) for safety and for dust control purposes. Prior to exiting the site, the vehicle will be swept to remove any extra soil from areas not covered or protected. This cleanup/decontamination area will be set up as close to the loading area as possible so as to minimize spreading the impacted soil. Prior to the off-site transport, the site manager will be responsible for inspecting each truck to ensure that the payloads are adequately covered, the trucks are cleaned of excess soil and properly placarded, and that the truck’s manifest has been completed and signed by the generator (or its agent) and the transporter. As the trucks leave the site, the flag person will assist the truck drivers so that they can safely merge with traffic on South Sacramento Street.
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7.6.4 Record Keeping
The removal action contractor will be responsible for maintaining a field logbook, which will serve to document observations, personnel on-site, equipment arrival and departure times, and other important project information. Logbook entries will be complete and accurate enough to permit reconstruction of field activities. Logbooks will be bound with consecutively numbered pages and each page will indicate the date and time of the entry. All entries will be legible, written in black or blue ink, and signed by the author. Language will be factual and objective. If an error is made, corrections will be made by crossing a line through the error and entering the correct information. Corrections will be dated and initialed. Because some portion of the excavated soil likely will be profiled as hazardous waste under California or EPA regulations, the Uniform Hazardous Waste Manifest (hazardous waste manifest) form will be used to track the movement of soil from the point of generation to the point of ultimate disposition. The hazardous waste manifests will include the following information:
Name and address of the generator, transporter, and the destination facility;
United States Department of Transportation description of the waste being transported and any associated hazards;
Waste quantity;
Name and phone number of a contact in case of an emergency;
EPA Hazardous Waste Generator Number; and,
Other information required either by the EPA and/or the DTSC.
Any soil that is profiled as non-hazardous and sent off-site for disposal will be documented using a Non-Hazardous Waste Manifest or bill-of-lading form. At a minimum, this form will include the following information:
Generator name and address; Transportation company; Accepting facility name and address; Waste shipping name and description; and, Quantity shipped.
Prior to transporting the excavated soil off-site, an authorized representative of PG&E will sign each hazardous and/or non-hazardous waste manifest. The removal action site manager will maintain one copy of all hazardous and/or non-hazardous waste manifests on-site.
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7.7 POST-REMEDIATION SITE EVALUATION AND RISK ASSESSMENT
Following remedial activities, confirmation soil sample data will be used to calculate post-remediation risk to potential site receptors under a future unrestricted residential land use. This evaluation will include soil gas data collected following remediation to confirm that vapor intrusion risks are below the acceptable threshold. Post-remediation soil gas sampling procedures will be described in a work plan submitted to the DTSC following completion of remediation and site restoration. The post-remediation risk assessment will be presented with the removal action completion report. To the extent that practical constraints limit the ability to fully remove impacted soils, as might occur within South Sacramento Street, the post-remediation risk assessment will provide the technical basis for defining the types of risk management measures that should be put in place to ensure long-term protection of human health and the environment.
7.8 SCHEDULE
Site remediation and related activities are scheduled for spring/summer 2013, the post-remediation soil gas sampling will be completed approximately six months following soil remediation, and the removal action completion report will be submitted in 2014.
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8.0 Sampling and Analysis Plan
The proposed removal action will require the collection and analysis of samples to confirm the removal of impacted media to levels protective of the RAOs. Sidewall samples, where stipulated, will be collected from the mid-point of the sidewall, or from material that appears to be chemically impacted, if present. All sampling will be conducted in general accordance with the quality assurance/quality control (QA/QC) plan presented in Section 10.
8.1 CONFIRMATION SAMPLING LOCATIONS
8.1.1 On-site Remedial Areas
Proposed on-site remedial areas are illustrated on Figure 3.
SITE. This remedial area corresponds to excavation of the entire site to 3 ft-bgs, resulting in removal of approximately 3,700 cubic yards of material. Confirmation samples will be collected at the nodes of a 30-foot by 30-foot grid, except from locations where deeper excavation will be completed. Approximately 27 discrete samples will be collected from the floor of the 3-foot excavation.
OT. Excavation of the oil tank to 14 feet below original grade will generate approximately 128 cubic yards. Three confirmation samples will be collected from the floor of the excavation, and four from the sidewalls, for a total of seven discrete samples.
OSL1. The former oil supply line will be removed during site-wide excavation. Three discrete samples will be collected beneath the former trace of the 75-foot pipeline.
OSL2. Excavation of OSL2 to 13 feet below original grade will generate approximately 67 cubic yards. Two confirmation samples will be collected from the floor of the excavation, and four from the sidewalls, for a total of six discrete samples.
OSL3. Excavation of OSL3 to 7 feet below original grade will generate approximately 67 cubic yards. Two confirmation samples will be collected from the floor of the excavation, and four from the sidewalls, for a total of six discrete samples.
LBS. Excavation of the lampblack separators to 7 feet below original grade will generate approximately 612 cubic yards. Seven confirmation samples will be collected from the floor of the excavation, and 14 from the sidewalls, for a total of 21 discrete samples.
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SH3A. Excavation of the on-site portion of the former storage holder to 5 feet below original grade will generate approximately 210 cubic yards. Three confirmation samples will be collected from the floor of the excavation, and four from the sidewalls, for a total of seven discrete samples.
TP2. Excavation of TP2 to 10 feet below original grade will generate approximately 15 cubic yards. One confirmation sample will be collected from the floor of the excavation, and four from the sidewalls, for a total of five discrete samples.
TP11. Excavation of TP11 to 10 feet below original grade will generate approximately 15 cubic yards. One confirmation sample will be collected from the floor of the excavation, and four from the sidewalls, for a total of five discrete samples.
8.1.2 Off-site Remedial Areas – South Sacramento Street
Proposed remedial areas within South Sacramento Street are illustrated on Figure 4.
SSS1. This remedial area corresponds to the length of the street adjacent to the site, excavation of which to 2 ft-bgs will generate approximately 342 cubic yards. Twelve confirmation samples will be collected from the floor of the excavation.
SSS2. Excavation of SSS2 to 3 feet below original grade will generate approximately 15 cubic yards. Two confirmation samples will be collected from the floor of the excavation.
SSS3. Excavation of SSS3 to 8 feet below original grade will generate approximately 64 cubic yards. Two confirmation samples will be collected from the floor of the excavation, and four from the sidewalls, for a total of six discrete samples.
SSS4. Excavation of SSS4 to 7 feet below original grade will generate approximately 125 cubic yards. Two confirmation samples will be collected from the floor of the excavation, and four from the sidewalls, for a total of six discrete samples.
SH3B. Excavation of the off-site portion of the former storage holder to 5 feet below original grade will generate approximately 52 cubic yards. Two confirmation samples will be collected from the floor of the excavation, and two from the sidewalls, for a total of four discrete samples.
8.1.3 Off-site Remedial Areas – LIW
Proposed remedial areas at the LIW property are illustrated on Figure 5.
LIW1. This remedial area corresponds to the length of the site, extending approximately 25 feet onto the LIW property. Excavation of this area to 3 ft-bgs will generate approximately 460 cubic
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yards. Twelve confirmation samples will be collected from the floor of the excavation, and six from the southern sidewall, for a total of 18 discrete samples.
LIW2A. Excavation of LIW2A to 4.5 feet below original grade will generate approximately 6 cubic yards. One confirmation sample will be collected from the floor of the excavation, and one from the southern sidewall, for a total of two discrete samples.
LIW2B. Excavation of LIW2B to 4.5 feet below original grade will generate approximately 6 cubic yards. One confirmation sample will be collected from the floor of the excavation, and one from the southern sidewall, for a total of two discrete samples.
8.2 SAMPLE COLLECTION AND ANALYSIS
8.2.1 Sampling Equipment
Samples will be collected from the bottom of the excavation using stainless steel or Teflon®-coated trowels, or a stainless steel slide hammer equipped with sample sleeves. Field personnel will use new, disposable Nitrile gloves at each sample location, and collect soil samples in laboratory-supplied sample containers. Soils from excavations extending deeper than 3 feet below existing grade will be sampled from the bucket of a backhoe.
8.2.2 Equipment Decontamination
All reusable field equipment used to collect and handle samples or collect field measurements will be decontaminated before coming into contact with any sample. Equipment will be decontaminated between sampling locations using a non-phosphate detergent, a potable water rinse, and a deionized water final rinse. Decontamination fluids will be containerized and disposed of following completion of the work.
8.2.3 Sample Handling
Soil samples will be labeled and placed in an insulated cooler with ice pending delivery to a state-certified analytical laboratory for analysis. A completed chain-of-custody record will accompany each shipment of samples.
8.2.4 Analytical Parameters
Confirmation soil samples will be analyzed for the following constituents, corresponding to the COPCs which contribute to excess cancer and non-cancer risk under current site conditions (Section 5.3):
PAHs using EPA Method 8270; BTEX using EPA Method 8260B; and
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Antimony, cobalt, lead, nickel and thallium using EPA Method 6010.
8.2.5 Data Evaluation
Soil samples will be analyzed to confirm that the cleanup goals for the site have been met. If sampling indicates that additional excavation is required, the area will be over-excavated to an appropriate depth if feasible and accessible, and confirmation soil samples will be collected from the excavation bottom and each of the four sidewalls. Secondary confirmation soil samples will be analyzed for appropriate constituents.
8.3 WASTE DISPOSAL CLASSIFICATION SAMPLING
PG&E intends to use existing data to profile excavated soils for disposal to the extent possible. All soils removed from the site will be disposed of at the Allied Waste Forward Landfill in Manteca, California; Waste Management’s Altamont Landfill in Livermore, California; Clean Harbors’ Buttonwillow Landfill in Buttonwillow, California; or the Chemical Waste Management solid waste facility in Kettleman Hills, California. The majority of soil will be classified as Class II; a small amount of soil (estimated at approximately 15 percent) will likely be classified as Class I California hazardous waste due to elevated concentrations of lead and/or benzene. Some degree of pre-excavation soil sampling may be performed to facilitate the landfill’s classification of the material.
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9.0 Quality Assurance Plan
The purpose of the Quality Assurance Plan (QAP) is to describe procedures to be followed in managing the project tasks and resultant data, and measures to ensure the validity and accuracy of each project task and the generated data. The objective of adhering to procedures presented in the QAP is to ensure the collection of representative data that can be used to meet the objectives of the project (i.e., that data can be relied upon to accurately represent post-remedial soil chemical conditions). In general, data quality and representativeness are assured by adherence to the formalized and standardized field and laboratory procedures outlined herein. All field and laboratory procedures will be performed by trained, qualified personnel.
9.1 PROJECT ORGANIZATION AND RESPONSIBILITIES
Soil samples will be collected under the direction of the Project Manager and a California Professional Geologist or Professional Engineer. All personnel involved with this project are aware of their individual responsibilities, as described in the following subsections, and understand that QA must be applied throughout the entire duration of the project.
9.1.1 Project Manager
The Project Manager will be responsible for adherence to project schedules, project coordination, maintaining project documentation, and management of technical, financial, and administrative aspects of the project. The Project Manager is the primary contact between the client, the DTSC, and the project team.
9.1.2 QA Director
The QA Director for the project is responsible for implementing the QA/QC Plan to ensure that sampling and analysis procedures are properly followed. The QA Director coordinates the necessary report preparation, reviews, and also provides QA audits. For this project, the QA Director and Project Manager roles are combined.
9.1.3 Health and Safety Officer
The responsibilities of the Health and Safety Officer include implementing the health and safety plan (HASP), documenting all health and safety-related activities, and ensuring that health and safety equipment is calibrated and maintained. A HASP will be generated and present at all times on the site.
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9.1.4 Field Geologist/Field Supervisor
The Field Geologist/Field Supervisor ensures that field activities are properly executed in accordance with the site-specific Work Plan and QA procedures. The Field Geologist/Field Supervisor has the authority to:
Stop any activity or procedure that is not following acceptable protocols;
Discard any sample that is not correctly collected, preserved, or transported;
Invalidate any data obtained from an improperly collected sample; and,
Invalidate any data if the proper sample handling and documentation procedures have not been followed.
9.2 CALIBRATION OF FIELD EQUIPMENT
All equipment and instruments used in the investigation will be maintained and calibrated to operate within the manufacturer's specifications so that the required sensitivity and QA/QC parameters are maintained. Analytical laboratory equipment will be maintained and calibrated in accordance with the laboratory's specific quality assurance plan and is a significant part of the laboratory accreditation evaluation. Operational procedures for all field equipment will be followed to ensure that the equipment is operating properly and that data are valid and traceable to a particular instrument. These procedures may include:
Operation theory; Functional operational checks; Routine maintenance; Calibration procedures; Simplified operational instructions; Special environmental conditions or interferences; and, Deactivation and storage procedures.
Calibration and maintenance requirements of the field equipment will follow the manufacturer's specifications.
9.3 SAMPLE HANDLING AND FIELD DOCUMENTATION
All confirmation soil samples will be collected in accordance with the protocols described in the sampling and analysis plan (Section 9.0). The following sections describe procedures for sample handling and documentation. Each sample is tracked from the time of collection by documentation which is completed
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during sampling and includes the following, as appropriate: 1) field log; 2) sampling field data sheet; 3) chain-of-custody record; and 4) sample labels.
9.3.1 Sample Containers
Soil samples will be collected one of two ways. Soil samples submitted for non-volatile constituents will be collected in glass jars or in stainless steel sample sleeves. Soil samples submitted for volatile constituents will be collected into hermetically-sealed containers consistent with SW-846 Method 5035. After sample collection, soil and water sample containers will be placed in an ice chest with ice and maintained at a temperature of approximately 4°C until delivery to the analytical laboratory, where samples will be stored under refrigeration.
9.3.2 Field Documentation
The field data recorded at the time of sample collection provides an unambiguous identification of each sample. These field data include the following, as appropriate:
Date of entry; Sample matrix; Description of sampling point (location and depth); Date and time of sample collection; Field sample identification number(s); References, such as maps or photographs, of the sampling site; and, Associated field observations or measurements taken at the time of collection.
Due to the variability of sampling situations, field notes will be as descriptive and inclusive as possible, allowing subsequent parties to be able to reconstruct the sampling event from the recorded information. Language within field notes will be objective, factual, and free of inappropriate or ambiguous terminology. All field personnel are to date and sign any data entries. All field documentation will be retained.
9.3.3 Sample Chain-of-Custody Record
Chain-of-custody records are designed to create an accurate written record which can be used to trace the possession and handling of the sample from the time of collection to the time of analysis. The chain-of-custody includes the following information:
Site name Sample identification number (assigned by the scientist in the field) Sample date
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Sample location, and, Type of analysis required.
Whenever the sample is transferred from one party to another, both parties sign the chain-of-custody and record the date and time of the transfer. If sample coolers are shipped to the laboratory via commercial freight (USPS, Federal Express, etc.) rather than by a laboratory courier, the coolers will be secured with custody seals.
9.3.4 Sample Labels
Sample labels will be completed and affixed to appropriate containers immediately prior to or immediately following sample collection. The label will be filled out in indelible ink and includes the following information:
Sample ID number; Date; Time; Preservatives, and, Sampler's initials.
9.3.5 Sample Collection Log
Each day in the field, the samples collected will be listed on a sample collection log. The log includes the date and time the sample was collected, name of the individual(s) who collected the sample, the sample ID, sampling location, depth, matrix, sample collection method, number of sample containers per sample, corresponding field screening results (such as PID readings), and any other notable comments.
9.4 FIELD QUALITY CONTROL SAMPLES
The level of quality control effort will be consistent with that required by standard US EPA or DTSC protocols. The data quality elements that will be checked and documented include blind (field replicate) duplicate samples, trip blanks, equipment blanks, matrix spike/matrix spike duplicates, and surrogate spiking, as described in the following sections.
9.4.1 Blind Duplicate Samples
Blind duplicate (field replicate) samples will be collected to evaluate precision associated with the reproducibility of sampling techniques and the homogeneity of sample matrices. Replicate samples will be collected at a frequency of 10 percent. Since the replicate will be “blind” to the laboratory, it will have a coded identity on its label and on the chain-of-custody record form. The actual sampling location and identification will be recorded in the sample collection log.
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9.4.2 Equipment Blanks
Equipment blanks will be prepared and submitted for laboratory analysis to verify that equipment decontamination procedures are effective. Equipment blanks are submitted for analysis of the same analytes that are required for the associated field samples. The blanks are prepared by pouring water being used for decontamination (i.e., distilled or deionized water) through the field sampling device(s) and into the appropriate set of sample bottles. Equipment blanks will be preserved and handled in the same manner as the associated samples.
9.5 LABORATORY QUALITY CONTROL SAMPLES
9.5.1 Matrix Spike/Matrix Spike Duplicates
Matrix spike/matrix spike duplicates (MS/MSDs) will be prepared and analyzed by the laboratory at a frequency of one per every 20 investigative samples received. MS/MSDs are samples in which compounds are added before extraction and analyses. The recoveries for spiked compounds can be used to assess how well the method for analysis recovers target compounds.
9.5.2 Surrogate Spiking
Surrogate compounds are added before sample preparation for organics to all samples prior to extraction and analysis. The review for surrogate compounds can be used to assess method accuracy for each sample matrix.
9.6 DATA REDUCTION, VALIDATION AND REPORTING
Data from the analytical laboratory will be reviewed by internal laboratory management before being submitted to the Project Manager/QA Director. Analytical data from the laboratory must include the data report, and all related QA/QC data. The Project Manager/QA Director will be responsible for evaluation of the data, including tabulating all laboratory data and completing a QA/QC review.
9.6.1 Corrective Action
During the course of the project it will be the responsibility of the Project Manager to ensure that all of the specified sampling procedures are followed and that data meet prescribed acceptance criteria. The field and analytical procedures will be reviewed if QA/QC problems or deficiencies requiring corrective action occur. If a problem is discovered, prompt and prescribed action will be taken to correct the problem. Corrective action may be initiated based upon QC data or audit results.
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9.6.2 Quality Assurance Reports
The Project Manager/QA Director will rely on written reports and memoranda documenting data assessment, audits, nonconformance, and corrective actions to verify that QA requirements are being met. QA/QC will be documented. All information received from an outside source or developed during the project will be stored in project files. The Project Manager will identify which field documents will be designated as QA records for the project file. The Project Manager will also ensure that QA records are properly stored and retrievable upon completion of the project.
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10.0 Health and Safety Plan
All contractors will be responsible for operating in accordance with the most current requirements of state and federal Standards for Hazardous Waste Operations and Emergency Response (Cal. Code Regs., tit. 8, section 5192; 29 CFR 1910.120). On-site personnel are responsible for operating in accordance with all applicable regulations of the Occupational Safety and Health Administration (OSHA) outlined in the State General Industry and Construction Safety Orders (Cal. Code Regs., tit. 8) and Federal Construction Industry Standards (29 CFR 1910 and 29 CFR 1926), as well as other applicable federal, state, and local laws and regulations. All personnel shall operate in compliance with all California OSHA requirements. A site-specific HASP will be developed and presented in the implementation work plan. The HASP will consider potential adverse effects on nearby receptors during excavation, and will present air monitoring protocols to mitigate these potential adverse effects. The HASP will identify COPCs and air monitoring action levels. The HASP will be kept on-site during all phases of the work and reviewed twice daily by project staff during tailgate health and safety meetings. The provisions of the HASP are mandatory for all project personnel. PG&E’s contractor and its subcontractors doing fieldwork in association with this RAW will either adopt and abide by the HASP or shall develop their own safety plans which, at a minimum, meet the requirements of the HASP. All on-site personnel shall read the HASP and sign the “Plan Acceptance Form.”
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11.0 References
American Society for Testing and Materials or ASTM standard D 1557. 2007. City of Lodi, 2006. Reynolds Ranch Draft Environmental Impact Report. City of Lodi Water Pollution Control Facility, 2006. Groundwater Investigation Existing Conditions Report.
October. Craig Communications, 2008. Public Participation Plan, Former Lodi Manufactured Gas Plant, 712 South
Sacramento Street, Lodi, California. October. Department of Toxic Substances Control (DTSC), 2001a. Guidance for Developing Transportation Plans
for Removal or Remedial Actions (Interim Final). December 5.
Department of Toxic Substances Control (DTSC), 2001b. Information Advisory – Clean Imported Fill Material. October.
Garcia and Associates (GANDA). Final Historical Resources Evaluation Report for the Pacific Gas and Electric Lodi Former Manufactured Gas Plant General Shop and Store Room/Meter House Building, Lodi, San Joaquin County, California. September 2007.
Iris Environmental, 2011. Draft Human Health Risk Assessment, PG&E Former Lodi Manufactured Gas
Plant, Lodi, California. March. Regional Water Quality Control Board, 2008. Screening for Environmental Concerns at Sites with
Contaminated Soil and Groundwater. Interim Final, May. Stantec Consulting Services Inc. (Stantec), 2009a. Well Destruction Report. August 13. Stantec, 2010a. Remedial Investigation Completion Report. June 8. Stantec, 2010b. Revised Remedial Refinement Work Plan. June 11. Stantec, 2010c. Results of Soil Vapor Extraction Pilot Testing. October 29. Stantec, 2010d. Notice of Action – Soil Vapor Extraction Pilot Testing. June 16. Treadwell & Rolo. Report of Third Quarter 2007 Groundwater Monitoring. January 8, 2008.
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United States Environmental Protection Agency (USEPA), 1973. Processes, Procedures and Methods to Control Pollution Resulting From All Construction Activity. 430/9-73-007.
United States Environmental Protection Agency (USEPA), 2000. Test Methods for Evaluating Solid Waste, Physical/Chemical Methods (SW 846). November.
United States Environmental Protection Agency (USEPA), 2009. Regional Screening Levels. December.
WATCH Manual; California Joint Utility Traffic Control Committee 1996.
FINAL HUMAN HEALTH RISK ASSESSMENT / FEASIBILITY STUDY / REMOVAL ACTION WORKPLAN FORMER LODI MANUFACTURED GAS PLANT
FIGURES Human Health Risk Assessment / Feasibility Study / Removal Action
Workplan Former Lodi Manufactured Gas Plant
PN: 185702232 July 11, 2012
FINAL HUMAN HEALTH RISK ASSESSMENT / FEASIBILITY STUDY / REMOVAL ACTION WORKPLAN FORMER LODI MANUFACTURED GAS PLANT
APPENDIX A Historical Soil, Groundwater, and Soil Gas Chemical
Data Human Health Risk Assessment / Feasibility Study / Removal Action
Workplan Former Lodi Manufactured Gas Plant
PN: 185702232 July 11, 2012
EPA Method 7471A
Sb As Ba Be Cd Cr Co Cu Pb Mo Ni Se Ag Tl V Zn Hgmg/kg mg/kg mg/kg mg/kg mg/kg mg/kg mg/kg mg/kg mg/kg mg/kg mg/kg mg/kg mg/kg mg/kg mg/kg mg/kg mg/kg
SS-1 0 2/24/2006 <0.5 2 93.7 <0.2 <0.5 8.7 5.3 14.5 23.9 0.64 5.4 <0.5 0.58 <2 30.2 136 0.21SS-2 0 2/24/2006 0.97 1.3 55.2 <0.2 <0.5 6.7 2.1 26.4 24,800 <0.5 6.8 <0.5 0.38 <2 12.1 70.4 <0.1SS-3 0 2/24/2006 1.4 4.7 57.8 <0.2 0.50 4.6 1.8 24.1 451 <0.5 3.0 <0.5 0.24 7.8 7.8 47.1 0.23SS-4 0 2/24/2006 0.54 3.7 191 <0.2 <0.5 29.8 7.4 21.8 691 <0.5 16.7 <0.5 0.32 <2 45.2 289 <0.1SS-5 0 2/24/2006 <0.5 2.8 114 <0.2 <0.5 12.3 7 15.3 147 1.1 9.5 <0.5 0.39 <2 39.2 135 <0.1SS-6 0 2/24/2006 <0.5 2.5 59.8 <0.2 <0.5 17.3 6.5 12.4 3.2 0.77 16.6 <0.5 0.23 <2 37.5 21.6 <0.1SS-7 0 2/24/2006 49.6 9.2 132 <0.2 <0.5 12.5 7.9 48.4 1,400 1.4 103 <0.5 0.46 <2 154 145 <0.1SS-8 0 2/24/2006 26.7 7.5 104 <0.2 <0.5 14.2 6.9 180 2,320 1.6 76.4 <0.5 0.17 <2 58.7 140 0.11SS-9 0 2/24/2006 <0.5 3.2 106 0.21 <0.5 16.1 6.4 19.9 165 1.1 14.0 <0.5 0.23 <2 40.7 63.7 <0.1
SB-1-0' 0 10/15/2008 <0.75 2.18 84.5 <0.25 <0.50 10.5 4.49 9.18 39.3 <0.25 4.58 <0.75 <0.25 <0.75 22.2 384 <0.0835SB-1-3' 3 10/15/2008 <0.75 <0.75 75.4 0.268 <0.50 6.26 5.12 6.49 5.55 <0.25 4.19 <0.75 <0.25 <0.75 23.1 24.6 <0.0835SB-1-6' 6 10/15/2008 <0.75 <0.75 57.1 <0.25 <0.50 4.86 4.51 4.81 1.93 <0.25 3.48 <0.75 <0.25 <0.75 20.7 19.9 <0.0835SB-1-9' 9 10/15/2008 <0.75 6.03 96.3 0.424 <0.50 8.33 9.19 9.49 3.56 <0.25 7.38 <0.75 <0.25 <0.75 48.3 36.8 <0.0835SB-2-0' 0 10/15/2008 <0.75 <0.75 103 0.267 <0.50 6.16 5.53 7.07 2.64 <0.25 4.60 <0.75 <0.25 <0.75 23.6 25.9 <0.0835
SB-2-0' (DUP-6) 0 10/15/2008 <0.75 0.807 109 0.268 <0.50 6.01 5.85 7.63 2.76 <0.25 4.57 <0.75 <0.25 <0.75 22.9 27.4 <0.0835SB-2-3' 3 10/15/2008 <0.75 1.19 85.3 0.300 <0.50 7.11 5.16 7.15 2.22 <0.25 5.17 <0.75 <0.25 <0.75 26.5 29.9 <0.0835SB-2-6' 6 10/15/2008 <0.75 0.904 55.6 <0.25 <0.50 5.87 4.18 6.50 1.82 <0.25 3.72 <0.75 <0.25 <0.75 22.7 24.6 <0.0835SB-2-9' 9 10/15/2008 <0.75 1.97 76.2 0.263 <0.50 6.58 4.93 6.97 1.79 <0.25 7.05 <0.75 <0.25 <0.75 26.8 23.8 <0.0835SB-3-0' 0 10/14/2008 <0.75 <0.75 23.0 <0.25 <0.50 2.66 2.13 5.47 1.96 <0.25 2.99 <0.75 <0.25 <0.75 12.6 112 0.127SB-3-3' 3 10/14/2008 <0.75 1.48 97.0 <0.25 <0.50 6.32 4.86 12.9 53.1 <0.25 7.37 <0.75 <0.25 <0.75 22.1 63.9 0.111SB-3-6' 6 10/14/2008 <0.75 1.27 71.0 <0.25 <0.50 5.52 4.84 9.34 22.1 <0.25 5.66 <0.75 <0.25 <0.75 21.2 44.9 <0.0835SB-3-9' 9 10/14/2008 <0.75 <0.75 30.9 <0.25 <0.50 3.60 3.72 5.63 2.0 <0.25 3.48 <0.75 <0.25 <0.75 14.7 109 <0.0835
SB-3-9' (DUP-3) 9 10/14/2008 <0.75 2.08 82.7 <0.25 <0.50 7.07 4.91 10.5 13.4 <0.25 6.05 <0.75 <0.25 <0.75 25.9 34.8 <0.0835SB-4-0' 0 10/14/2008 <0.75 1.17 63.3 <0.25 <0.50 5.97 4.44 7.39 14.9 <0.25 4.90 <0.75 <0.25 <0.75 19.5 34.9 <0.0835SB-4-3' 3 10/14/2008 <0.75 1.29 83.7 0.251 <0.50 9.60 5.02 11.7 64.9 <0.25 15 <0.75 <0.25 <0.75 22.8 66.1 <0.0835SB-4-6' 6 10/14/2008 <0.75 1.23 81.6 0.274 <0.50 6.85 6.68 9.86 24.8 <0.25 11.1 <0.75 <0.25 <0.75 24.4 56.3 <0.0835SB-4-7' 7 10/14/2008 <0.75 2.19 119 0.282 <0.50 6.64 4.12 40.5 783 <0.25 14 <0.75 <0.25 <0.75 35.9 56.8 <0.0835SB-4-9' 9 10/14/2008 <0.75 <0.75 40.0 <0.25 <0.50 4.29 6.96 3.79 1.8 0.33 4.02 <0.75 <0.25 <0.75 17.9 26.6 <0.0835SB-5-0' 0 10/15/2008 14.7 5.36 126 0.504 0.738 10.2 6.71 20.2 1,100 <0.25 51.1 <0.75 <0.25 <0.75 54.9 191 0.140SB-5-6' 6 10/15/2008 <0.75 1.83 69.2 0.321 <0.5 7.11 5.38 6.99 2.24 <0.25 5.61 <0.75 <0.25 <0.75 32.0 33.9 <0.0835SB-5-9' 9 10/15/2008 <0.75 1.39 96.7 0.287 <0.5 7.19 6.25 8.06 2.72 <0.25 4.96 <0.75 <0.25 <0.75 28.2 44.0 <0.0835
SB-6-7.5' 7.5 10/14/2008 <0.75 0.858 49.9 0.41 0.602 5.02 6.62 30.3 12.2 0.625 194 <0.75 <0.25 <0.75 103 54.6 <0.0835SB-6-9.5' 9.5 10/14/2008 <0.75 <0.75 38.4 <0.25 <0.50 1.54 0.618 2.22 26.6 <0.25 18.6 <0.75 <0.25 <0.75 16.3 20.8 <0.0835SB-6-12.5' 12.5 10/14/2008 <0.75 1.18 57.6 <0.25 <0.50 6.43 1.74 3.65 93.2 <0.25 9.31 <0.75 <0.25 <0.75 9.07 29.2 0.0930
SB-7-0' 0 10/15/2008 0.765 2.37 119 <0.25 <0.50 7.08 3.57 25.9 988 <0.25 14.3 <0.75 <0.25 <0.75 28.3 121 0.146SB-7-3' 3 10/15/2008 <0.75 1.91 92.40 0.361 <0.50 8.47 6.26 8.32 31.9 <0.25 6.62 <0.75 <0.25 <0.75 32.0 43.5 <0.0835SB-7-6' 6 10/15/2008 <0.75 1.99 116.0 0.309 <0.50 13.1 7.36 13.5 227 <0.25 9.52 <0.75 <0.25 <0.75 34.4 72.9 <0.0835
SB-7-6' (DUP-4) 6 10/15/2008 <0.75 2.33 93.7 0.394 <0.50 8.92 15.8 8.87 26.5 <0.25 8.39 <0.75 <0.25 <0.75 33.6 54.8 <0.0835SB-7-9' 9 10/15/2008 <0.75 6.79 148 0.412 <0.50 7.77 10.6 11.6 4.14 <0.25 9.09 <0.75 <0.25 <0.75 51.5 45.4 <0.0835SB-8-0' 0 10/15/2008 <0.75 <0.75 67.2 <0.25 <0.50 5.47 3.39 5.44 3.30 <0.25 3.94 <0.75 <0.25 <0.75 18.1 24.0 <0.0835SB-8-3' 3 10/15/2008 <0.75 <0.75 82.9 <0.25 <0.50 5.92 8.30 10.5 3.99 <0.25 4.62 <0.75 0.396 <0.75 19.4 22.7 <0.0835
SB-8-5.5' 5.5 10/15/2008 4.81 5.66 84.9 <0.25 2.23 8.00 6.60 53.0 97.3 1.06 58.3 <0.75 <0.25 <0.75 24.8 574 <0.0835SB-8-6' 6 10/15/2008 <0.75 <0.75 97.7 <0.25 <0.50 7.30 5.12 4.40 2.54 <0.25 5.07 <0.75 <0.25 <0.75 37.4 72.6 <0.0835SB-8-9' 9 10/15/2008 <0.75 5.43 119 0.665 <0.50 17.60 7.94 11.0 5.60 <0.25 11.5 <0.75 <0.25 <0.75 50.3 38.4 <0.0835SB-9-0' 0 10/13/2008 2.00 3.49 107 0.317 0.542 11.20 6.43 20.3 153 <0.25 14.4 <0.75 <0.25 <0.75 33.7 119 <0.0835
Historical Soil Chemical Data - MetalsTABLE A-1
Pacific Gas and Electric Company Former Lodi Manufactured Gas Plant Site712 S. Sacramento Street, Lodi, California
EPA Method 6010BSample ID Depth
(feet) Date
app a_Historical Data_Lodi MGP.xlsx/A1 1 of 7 4/19/2011
EPA Method 7471A
Sb As Ba Be Cd Cr Co Cu Pb Mo Ni Se Ag Tl V Zn Hgmg/kg mg/kg mg/kg mg/kg mg/kg mg/kg mg/kg mg/kg mg/kg mg/kg mg/kg mg/kg mg/kg mg/kg mg/kg mg/kg mg/kg
Historical Soil Chemical Data - MetalsTABLE A-1
Pacific Gas and Electric Company Former Lodi Manufactured Gas Plant Site712 S. Sacramento Street, Lodi, California
EPA Method 6010BSample ID Depth
(feet) Date
SB-9-3' 3 10/13/2008 <0.75 1.97 116 0.343 <0.50 7.25 6.48 8.64 13.1 <0.25 5.67 <0.75 <0.25 <0.75 30.6 39.1 <0.0835SB-9-3' (DUP-1) 3 10/13/2008 <0.75 1.80 106 0.376 <0.50 7.53 7.18 8.66 4.26 <0.25 5.64 <0.75 <0.25 <0.75 32.7 33.6 <0.0835
SB-9-6' 6 10/13/2008 <0.75 1.93 107 0.330 <0.50 7.41 6.51 8.87 6.93 <0.25 5.61 <0.75 <0.25 <0.75 32.8 37.0 <0.0835SB-9-9' 9 10/13/2008 <0.75 1.23 55.8 <0.25 <0.50 3.91 4.07 5.67 2.36 <0.25 2.95 <0.75 <0.25 <0.75 20.7 20.2 <0.0835
SB-9-9' (DUP-2) 9 10/13/2008 <0.75 2.29 135 0.394 3.35 9.32 7.46 10.6 3.79 <0.25 16.8 <0.75 <0.25 <0.75 38.4 49.4 <0.0835SB-10-1.5' 1.5 10/15/2008 <0.75 1.21 88.3 <0.25 <0.50 3.71 139 123 56.6 <0.25 12.3 <0.75 3.57 <0.75 13.7 46.4 <0.0835SB-10-3' 3 10/15/2008 <0.75 1.03 87.0 0.309 <0.50 6.56 16.7 17.0 9.40 <0.25 5.28 <0.75 <0.25 <0.75 27.6 27.2 <0.0835
SB-10-3' (DUP-5) 3 10/15/2008 <0.75 0.816 91.4 0.30 <0.50 6.45 7.30 9.06 4.57 <0.25 4.90 <0.75 <0.25 <0.75 28.4 27.5 <0.0835SB-10-6' 6 10/15/2008 <0.75 1.15 87.0 0.282 <0.50 6.67 7.29 7.26 2.79 <0.25 4.48 <0.75 <0.25 <0.75 30.8 25.2 <0.0835SB-10-9' 9 10/15/2008 <0.75 4.92 109 0.372 <0.50 8.43 8.56 11.6 3.42 <0.25 6.53 <0.75 <0.25 <0.75 44.4 41.0 <0.0835SB-11-0' 0 10/14/2008 <0.75 1.29 109 0.271 <0.50 11.7 4.29 11.2 101 <0.25 8.15 <0.75 <0.25 <0.75 24.0 56.2 <0.0835SB-11-3' 3 10/14/2008 <0.75 1.90 101 0.409 <0.50 8.06 4.82 13.5 4.70 <0.25 8.15 <0.75 <0.25 <0.75 63.5 39.2 <0.0835SB-11-6' 6 10/14/2008 <0.75 2.04 94.4 0.320 <0.50 8.42 4.82 9.92 3.62 <0.25 8.84 <0.75 <0.25 <0.75 36.9 31.2 <0.0835SB-11-9' 9 10/14/2008 <0.75 0.893 45.1 <0.25 <0.50 7.43 4.28 6.60 2.42 <0.25 48.9 <0.75 <0.25 <0.75 20.3 23.6 <0.0835SB-11-15' 15 10/14/2008 <0.75 1.86 65.6 <0.25 <0.50 5.06 3.77 4.06 1.47 <0.25 2.87 <0.75 <0.25 <0.75 21.5 19.8 <0.0835SB-12-0' 0 10/14/2008 <0.75 1.38 110 0.265 <0.50 8.54 5.29 13.9 99.2 <0.25 8.71 <0.75 <0.25 <0.75 22.8 83.5 <0.0835
SB-12-1.5' 1.5 10/14/2008 <0.75 1.94 81.8 0.254 <0.50 6.06 6.11 4.97 2.48 <0.25 5.46 <0.75 <0.25 <0.75 24.8 28.1 <0.0835SB-12-3' 3 10/14/2008 2.03 2.82 123 0.306 <0.50 6.37 4.86 25.6 383 0.262 28.4 <0.75 <0.25 <0.75 46.8 86.7 <0.0835SB-12-6' 6 10/14/2008 <0.75 1.75 101 0.379 <0.50 8.43 4.77 24.1 54 <0.25 52.4 <0.75 <0.25 <0.75 47.5 82.0 0.128SB-12-9' 9 10/14/2008 <0.75 1.50 96.7 0.291 <0.50 8.28 5.09 9.33 7.67 <0.25 14.2 <0.75 <0.25 <0.75 38.7 40.4 <0.0835SB-12-12' 12 10/14/2008 <0.75 1.60 60.3 0.323 <0.50 10.5 7.03 8.96 3.54 <0.25 9.3 <0.75 <0.25 <0.75 28.4 24.6 <0.0835SB-12-15' 15 10/14/2008 <0.75 4.11 73.2 0.413 <0.50 10.0 6.01 6.51 4.43 <0.25 7.40 <0.75 <0.25 <0.75 46.3 32.4 <0.0835SB-13-0' 0 10/13/2008 2.40 3.61 146 <0.25 <0.50 6.37 3.22 16.5 386 <0.25 9.31 <0.75 <0.25 <0.75 25.4 102 0.389SB-13-3' 3 10/13/2008 <0.75 1.75 109 <0.25 <0.50 7.04 4.45 9.84 116 <0.25 5.31 <0.75 <0.25 <0.75 25.6 51.7 <0.0835SB-13-6' 6 10/13/2008 <0.75 1.55 87.4 <0.25 <0.50 5.86 3.25 10.1 46.6 <0.25 10.4 <0.75 <0.25 <0.75 31.7 41.4 <0.0835SB-13-9' 9 10/13/2008 <0.75 2.42 95.8 0.302 <0.50 9.47 9.04 9.61 3.36 <0.25 7.09 <0.75 <0.25 <0.75 29.4 30.1 <0.0835SB-14-0' 0 10/13/2008 <0.75 3.07 137 0.324 0.713 10.9 7.02 27.0 145 <0.25 15.7 <0.75 <0.25 <0.75 27.9 122 <0.0835SB-14-2' 2 10/13/2008 <0.75 2.30 96.2 <0.25 <0.50 7.64 3.95 23.2 143 <0.25 12.3 <0.75 <0.25 <0.75 23.8 61.3 <0.0835SB-14-3' 3 10/13/2008 <0.75 2.26 123 0.379 <0.50 8.39 7.32 11.9 37.9 <0.25 9.01 <0.75 <0.25 <0.75 32.6 51.1 <0.0835SB-14-6' 6 10/13/2008 <0.75 2.26 104 0.318 <0.50 6.90 7.06 8.13 10.1 <0.25 5.79 <0.75 <0.25 <0.75 32.0 31.7 <0.0835SB-14-9' 9 10/13/2008 <0.75 2.21 45.6 0.261 <0.50 8.59 4.54 8.40 2.58 <0.25 7.51 <0.75 <0.25 <0.75 24.8 21.5 <0.0835SB-15-0' 0 10/13/2008 <0.75 2.31 106 0.266 <0.50 8.86 5.49 20.0 261 <0.25 14.2 <0.75 <0.25 <0.75 25.3 106 <0.0835SB-15-3' 3 10/13/2008 <0.75 2.07 104 0.297 <0.50 8.24 5.49 13.0 55.3 <0.25 8.14 <0.75 <0.25 <0.75 26.5 50.1 <0.0835SB-15-6' 6 10/13/2008 <0.75 2.63 124 0.445 <0.50 8.60 7.98 10.7 27.3 <0.25 8.08 <0.75 <0.25 <0.75 37.7 45.3 <0.0835SB-15-9' 9 10/13/2008 <0.75 0.935 35.2 <0.25 <0.50 2.43 2.53 3.29 1.09 <0.25 2.06 <0.75 <0.25 <0.75 11.5 12.7 <0.0835SB-16-1' 1 10/13/2008 <0.75 2.31 267 0.261 <0.50 9.27 4.26 49.9 371 <0.25 8.64 <0.75 <0.25 <0.75 26.6 73.0 <0.0835SB-16-3' 3 10/13/2008 <0.75 0.923 61.8 <0.25 <0.50 4.57 3.63 6.60 32.0 <0.25 3.62 <0.75 <0.25 <0.75 16.1 21.4 <0.0835SB-16-6' 6 10/13/2008 <0.75 2.63 131 0.369 <0.50 8.23 6.94 8.67 4.87 <0.25 6.56 <0.75 <0.25 <0.75 36.9 35.0 <0.0835SB-16-9' 9 10/13/2008 <0.75 4.10 95.8 0.306 <0.50 6.03 7.76 8.49 3.14 <0.25 5.09 <0.75 <0.25 <0.75 37.0 39.6 <0.0835SB-17-1' 1 11/5/2009 <0.750 5.04 91.1 <0.250 <0.500 10.5 4.62 19.0 863 <0.250 16.4 <0.750 <0.250 <0.750 38.8 62.1 <0.0835SB-17-18' 18 11/6/2009 <0.750 5.18 81.5 <0.250 <0.500 13.0 6.89 6.50 10.1 <0.250 6.93 <0.750 <0.250 <0.750 33.4 28.1 <0.0835
SB-17-20.5' 20.5 11/6/2009 <0.750 1.70 81.0 <0.250 <0.500 11.4 5.62 8.16 2.00 <0.250 8.16 <0.750 <0.250 <0.750 28.4 17.8 <0.0835SB-17-25.5' 25.5 11/6/2009 <0.750 1.61 112 <0.250 <0.500 5.88 5.49 5.54 1.45 <0.250 5.07 <0.750 <0.250 <0.750 22.3 33.3 <0.0835
SB-18-0' 0 11/4/2009 <0.750 2.80 91.0 <0.250 <0.500 2.74 1.53 55.6 268 0.988 8.70 <0.750 0.473 <0.750 8.44 30.4 0.144SB-18-8' 8 11/4/2009 <0.750 3.54 153 0.271 <0.500 11.0 9.19 8.86 3.42 <0.250 9.52 <0.750 <0.250 <0.750 40.7 47.8 0.0133 J
app a_Historical Data_Lodi MGP.xlsx/A1 2 of 7 4/19/2011
EPA Method 7471A
Sb As Ba Be Cd Cr Co Cu Pb Mo Ni Se Ag Tl V Zn Hgmg/kg mg/kg mg/kg mg/kg mg/kg mg/kg mg/kg mg/kg mg/kg mg/kg mg/kg mg/kg mg/kg mg/kg mg/kg mg/kg mg/kg
Historical Soil Chemical Data - MetalsTABLE A-1
Pacific Gas and Electric Company Former Lodi Manufactured Gas Plant Site712 S. Sacramento Street, Lodi, California
EPA Method 6010BSample ID Depth
(feet) Date
SB-18-16' 16 11/4/2009 <0.750 8.67 96.5 0.305 <0.500 19.2 10.0 12.9 4.25 <0.250 14.9 <0.750 <0.250 <0.750 38.8 24.6 0.0242 JSB-18-26' 26 11/4/2009 <0.750 3.12 212 0.427 <0.500 16.3 11.3 14.8 5.62 <0.250 11.8 <0.750 <0.250 <0.750 49.3 72.5 0.0230 J
SB-18-26' (DUP-1) 26 11/4/2009 <0.750 5.54 148 0.209 J <0.500 7.44 8.50 10.3 3.03 0.328 6.23 <0.750 <0.250 <0.750 47.8 48.2 0.0134 JSB-18-65' 65 11/4/2009 <0.750 3.08 82.9 0.320 <0.500 14.8 7.33 9.24 3.63 <0.250 14.9 <0.750 <0.250 <0.750 33.1 25.5 <0.0835SB-19-5' 5 11/5/2009 <0.750 2.68 96.5 <0.250 <0.500 7.10 9.37 5.50 1.99 <0.250 6.78 <0.750 <0.250 <0.750 32.3 41.4 <0.0835
SB-19-15.5 15.5 11/5/2009 <0.750 8.47 144 <0.250 <0.500 8.79 11.8 7.88 3.14 <0.250 11.3 <0.750 <0.250 <0.750 41.8 46.5 <0.0835SB-19-21' 21 11/5/2009 <0.750 2.34 60.1 <0.250 <0.500 10.3 5.24 4.19 2.23 <0.250 5.38 <0.750 <0.250 <0.750 22.4 17.7 <0.0835SB-19-28' 28 11/5/2009 <0.750 2.19 137 0.336 <0.500 12.3 9.90 9.97 3.79 <0.250 8.95 <0.750 <0.250 <0.750 38.4 44.2 <0.0835SB-20-0' 0 11/4/2009 <0.750 2.90 131 <0.250 <0.500 8.78 5.91 19.9 90.6 <0.250 10.6 <0.750 <0.250 <0.750 32.3 66.1 0.107SB-20-14' 14 11/5/2009 <0.750 6.42 67.6 0.361 <0.500 20.2 6.27 12.5 4.12 <0.250 12.1 <0.750 <0.250 <0.750 49.7 23.4 <0.0835SB-20-20' 20 11/5/2009 <0.750 2.46 83.1 <0.250 <0.500 11.8 6.19 6.46 2.25 <0.250 7.12 <0.750 <0.250 <0.750 30.1 18.1 <0.0835
SB-20-66.5' 66.5 11/5/2009 <0.750 1.49 36.3 <0.250 <0.500 3.52 2.72 2.28 0.908 <0.250 3.31 <0.750 <0.250 <0.750 14.5 10.2 <0.0835SB-20-66.5' (DUP-4) 66.5 11/5/2009 <0.750 5.73 152 0.470 <0.500 18.3 10.9 9.36 5.23 <0.250 16.3 <0.750 <0.250 <0.750 56.9 34.4 <0.0835
SB-21-0' 0 11/3/2009 <0.750 8.46 110 0.183 J 0.173 J 10.2 6.20 20.5 77.8 <0.250 10.1 <0.750 <0.250 <0.750 23.8 168 0.0284 JSB-21-5' 5 11/2/2009 <0.750 2.85 87.6 0.157 J <0.500 6.73 6.29 5.68 1.93 <0.250 4.60 <0.750 <0.250 <0.750 29.4 35.2 0.0412 JSB-21-10' 10 11/2/2009 <0.750 4.54 99.4 0.213 J <0.500 7.59 7.23 6.92 2.86 0.100 J 5.28 <0.750 <0.250 <0.750 33.5 45.8 0.00895 JSB-22-0' 0 11/2/2009 <0.750 2.88 146 0.226 J <0.500 8.23 6.82 12.1 323 <0.250 8.05 <0.750 <0.250 <0.750 29.6 73.1 0.0332 JSB-22-5' 5 11/2/2009 <0.750 2.70 92.1 0.164 J <0.500 7.19 6.62 5.64 2.27 <0.250 4.82 <0.750 <0.250 <0.750 30.8 38.9 0.00795 JSB-22-10' 10 11/2/2009 <0.750 6.09 210 0.330 <0.500 13.6 11.5 11.6 4.50 <0.250 11.9 <0.750 <0.250 <0.750 44.7 76.0 0.0125 JSB-23-0' 0 11/2/2009 <0.750 7.16 145 0.159 <0.500 13.7 5.15 91.5 1,340 0.153 J 60.0 <0.750 <0.250 <0.750 100 92.4 2.77SB-23-10' 10 11/2/2009 <0.750 4.48 74.9 0.223 J <0.500 9.90 4.23 5.04 2.51 <0.250 8.26 <0.750 <0.250 <0.750 30.5 51.4 0.00635 JSB-23-12' 12 11/2/2009 0.923 4.75 133 0.166 <0.500 21.7 4.11 56.6 1,100 1.71 22.3 <0.750 <0.250 <0.750 40.8 99.3 1.06SB-23-15' 15 11/2/2009 <0.750 1.41 88.7 0.186 J <0.500 9.23 5.57 5.73 3.02 <0.250 6.25 <0.750 <0.250 <0.750 25.4 40.7 0.0120 JSB-24-0' 0 11/2/2009 <0.750 2.45 82.3 0.201 J <0.500 12.4 6.79 11.3 12.3 <0.250 11.5 <0.750 <0.250 <0.750 29.1 51.3 0.00925 JSB-24-5' 5 11/2/2009 <0.750 3.59 139 0.249 J <0.500 9.82 8.89 9.20 3.20 <0.25 6.98 <0.750 <0.250 <0.750 42.7 48.9 0.00735 JSB-24-10' 10 11/2/2009 <0.750 5.73 99.0 0.256 <0.500 12.3 6.58 8.56 3.93 0.252 9.90 <0.750 <0.250 <0.750 38.2 40.7 0.0175 JSB-25-0' 0 11/2/2009 <0.750 4.56 114 0.184 J <0.500 9.76 5.93 24.5 180 <0.250 13.2 <0.750 <0.250 <0.750 29.0 121 <0.0399 JSB-25-5' 5 11/2/2009 <0.750 3.72 193 0.258 <0.500 9.10 7.72 8.02 2.90 <0.250 6.63 <0.750 <0.250 <0.750 42.6 49.2 0.00967 JSB-25-10' 10 11/2/2009 <0.750 2.53 67.0 0.105 J <0.500 4.25 3.62 5.96 1.64 <0.250 3.23 <0.750 <0.250 <0.750 20.9 34.1 0.00835 JSB-26-0.5' 0.5 11/5/2009 <0.750 1.41 81.9 <0.250 <0.500 4.73 4.40 5.84 6.03 <0.250 3.86 <0.750 <0.250 <0.750 16.7 24.8 <0.0835SB-26-5' 5 11/5/2009 <0.750 2.32 48.9 <0.250 <0.500 5.78 5.01 4.61 1.81 <0.250 3.57 <0.750 <0.250 <0.750 25.2 16.5 <0.0835SB-26-15' 15 11/5/2009 <0.750 8.82 79.4 <0.250 <0.500 5.68 5.83 4.42 1.83 <0.250 4.13 <0.750 <0.250 <0.750 27.8 23.5 <0.0835SB-27-0.5' 0.5 11/5/2009 <0.750 1.92 101 <0.250 <0.500 5.51 6.11 7.10 52.1 <0.250 10.6 <0.750 <0.250 <0.750 20.4 47.0 <0.0835SB-27-5' 5 11/5/2009 <0.750 1.42 36.9 <0.250 <0.500 5.24 4.09 3.91 3.41 <0.250 3.30 <0.750 <0.250 <0.750 21.4 17.6 <0.0835
SB-27-10' (DUP-5) 10 11/5/2009 <0.750 1.42 36.7 <0.250 <0.500 3.28 3.71 3.75 1.25 <0.250 2.51 <0.750 <0.250 <0.750 16.5 15.5 <0.0835SB-27-15' 15 11/5/2009 <0.750 4.92 57.8 <0.250 <0.500 5.76 5.23 4.56 1.83 <0.250 4.46 <0.750 <0.250 <0.750 27.6 22.1 <0.0835SB-28-0.5' 0.5 11/5/2009 <0.750 1.39 95.5 <0.250 <0.500 6.65 4.93 8.99 52.1 <0.250 6.43 <0.750 <0.250 <0.750 21.7 50.2 <0.0835SB-28-8' 8 11/5/2009 <0.750 2.82 54.1 <0.250 <0.500 10.2 5.16 5.14 3.97 0.785 4.82 <0.750 <0.250 <0.750 26.7 19.8 <0.0835SB-28-15' 15 11/5/2009 <0.750 3.48 72.8 0.301 <0.500 16.3 7.09 6.29 3.28 <0.250 9.36 <0.750 <0.250 <0.750 45.3 33.4 <0.0835SB-29-0.5' 0.5 11/4/2009 <0.750 2.07 102 <0.250 <0.500 6.97 5.44 8.48 29.5 <0.250 7.81 <0.750 <0.250 <0.750 23.8 51.4 <0.0835SB-29-5' 5 11/4/2009 <0.750 2.42 63.1 <0.250 <0.500 6.50 4.73 4.92 1.93 <0.250 4.08 <0.750 <0.250 <0.750 32.0 22.3 <0.0835SB-29-10' 10 11/4/2009 <0.750 1.72 65.9 <0.250 <0.500 13.3 8.12 8.43 2.61 <0.250 11.0 <0.750 <0.250 <0.750 30.1 25.8 <0.0835SB-29-13' 13 11/4/2009 <0.750 2.76 71.5 <0.250 <0.500 11.1 8.85 6.38 3.39 <0.250 8.49 <0.750 <0.250 <0.750 30.6 26.8 <0.0835SB-30-0.5' 0.5 11/4/2009 <0.750 1.78 133 <0.250 <0.500 8.35 6.19 12.0 57.2 <0.250 7.61 <0.750 <0.250 <0.750 28.9 97.0 <0.0835
app a_Historical Data_Lodi MGP.xlsx/A1 3 of 7 4/19/2011
EPA Method 7471A
Sb As Ba Be Cd Cr Co Cu Pb Mo Ni Se Ag Tl V Zn Hgmg/kg mg/kg mg/kg mg/kg mg/kg mg/kg mg/kg mg/kg mg/kg mg/kg mg/kg mg/kg mg/kg mg/kg mg/kg mg/kg mg/kg
Historical Soil Chemical Data - MetalsTABLE A-1
Pacific Gas and Electric Company Former Lodi Manufactured Gas Plant Site712 S. Sacramento Street, Lodi, California
EPA Method 6010BSample ID Depth
(feet) Date
SB-30-5' 5 11/4/2009 <0.750 3.06 92.1 <0.250 <0.500 9.16 7.23 7.49 2.67 <0.250 6.11 <0.750 <0.250 <0.750 37.3 29.5 <0.0835SB-30-5' (DUP-3) 5 11/4/2009 <0.750 2.36 88.3 <0.250 <0.500 8.40 7.15 7.25 2.62 <0.250 5.67 <0.750 <0.250 <0.750 37.6 28.9 <0.0835
SB-30-10' 10 11/4/2009 <0.750 3.83 73.9 0.274 <0.500 20.8 8.42 12.1 3.48 0.555 12.4 <0.750 <0.250 <0.750 40.7 33.1 <0.0835SB-30-13' 13 11/4/2009 <0.750 11.6 101 <0.250 <0.500 10.3 8.87 7.14 3.84 <0.250 8.54 <0.750 <0.250 <0.750 48.2 37.1 <0.0835SB-31-0.5' 0.5 11/4/2009 <0.750 1.89 114 <0.250 <0.500 6.88 5.87 7.14 7.18 <0.250 5.34 <0.750 <0.250 <0.750 25.8 32.9 <0.0835SB-31-5' 5 11/4/2009 <0.750 2.64 75.6 <0.250 <0.500 6.74 6.36 5.57 1.68 <0.250 4.21 <0.750 <0.250 <0.750 31.1 22.6 <0.0835SB-31-10' 10 11/4/2009 <0.750 3.13 92.4 0.264 <0.500 14.3 7.48 10.5 3.73 <0.250 11.0 <0.750 <0.250 <0.750 40.0 31.7 <0.0835SB-31-15' 15 11/4/2009 <0.750 11.6 69.7 <0.250 <0.500 4.00 3.99 3.22 0.602 <0.250 4.26 <0.750 <0.250 <0.750 33.2 15.8 <0.0835SB-32-0.5' 0.5 11/4/2009 <0.750 1.44 102 <0.250 <0.500 6.06 5.58 6.27 5.31 <0.250 4.70 <0.750 <0.250 <0.750 21.6 35.9 <0.0835SB-32-5' 5 11/4/2009 <0.750 3.28 97.1 <0.250 <0.500 9.04 7.22 7.21 4.60 <0.250 6.03 <0.750 <0.250 <0.750 36.2 31.0 <0.0835SB-32-10' 10 11/4/2009 <0.750 6.60 142 0.455 <0.500 18.9 11.6 12.9 5.27 <0.250 15.7 <0.750 <0.250 <0.750 52.4 42.2 <0.0835SB-32-15' 15 11/4/2009 <0.750 4.06 49.0 <0.250 <0.500 3.56 4.79 3.53 0.889 <0.250 4.01 <0.750 <0.250 <0.750 25.7 20.9 <0.0835SB-33-0.5' 0.5 11/4/2009 <0.750 3.72 136 <0.250 <0.500 15.8 5.29 20.2 80.7 0.315 23.3 <0.750 <0.250 <0.750 44.4 70.9 <0.0835SB-33-5' 5 11/4/2009 <0.750 3.35 104 <0.250 <0.500 7.76 7.10 6.72 2.39 <0.250 7.18 <0.750 <0.250 <0.750 38.6 38.5 <0.0835SB-33-10' 10 11/4/2009 <0.750 12.0 207 0.709 <0.500 17.4 17.5 11.2 6.70 <0.250 30.2 <0.750 <0.250 <0.750 62.2 99.2 <0.0835SB-33-15' 15 11/4/2009 <0.750 3.79 53.2 <0.250 <0.500 6.39 4.93 4.51 1.23 <0.250 5.01 <0.750 <0.250 <0.750 32.3 23.6 <0.0835SB-34-0' 0 11/3/2009 <0.750 4.51 112 0.172 J <0.500 12.1 5.54 17.8 207 0.103 J 14.6 <0.750 <0.250 <0.750 27.2 115 0.0436 JSB-34-8' 8 11/3/2009 <0.750 2.87 116 0.168 J <0.500 8.53 4.96 10.8 2.41 0.239 J 6.07 <0.750 <0.250 <0.750 36.2 48.6 0.0205 JSB-34-12' 12 11/3/2009 <0.750 1.75 62.5 <0.250 <0.500 3.63 3.11 4.08 1.24 <0.250 2.67 <0.750 <0.250 <0.750 20.5 32.5 0.00985 J
SB-34-12' (DUP-2) 12 11/3/2009 <0.750 1.36 39.1 <0.250 <0.500 3.87 3.15 3.86 1.42 <0.250 3.02 <0.750 <0.250 <0.750 20.2 21.2 0.00661 JSB-35-0' 0 11/9/2009 <0.750 3.27 104 <0.250 <0.500 7.82 5.65 17.9 129 <0.250 12.5 <0.750 <0.250 <0.750 24.7 148 <0.0835SB-35-3' 3 11/9/2009 <0.750 3.00 97.9 <0.250 <0.500 7.67 6.74 7.61 3.39 <0.250 5.66 <0.750 <0.250 <0.750 31.9 40.7 <0.0835SB-35-6' 6 11/9/2009 <0.750 3.93 77.9 <0.250 <0.500 7.14 6.40 7.08 2.50 <0.250 8.13 <0.750 <0.250 <0.750 34.0 28.1 <0.0835SB-35-9' 9 11/9/2009 <0.750 4.86 84.6 <0.250 <0.500 13.2 7.44 10.7 3.31 0.375 10.5 <0.750 <0.250 <0.750 33.4 29.4 <0.0835
SB-36-0' 0 11/9/2009 <0.750 3.76 80.8 <0.250 <0.500 33.8 7.67 114 45.3 7.84 603 <0.750 <0.250 <0.750 20.9 90.0 <0.0835SB-36-3' 3 11/9/2009 <0.750 4.36 106 0.288 <0.500 31.1 8.34 12.2 9.31 4.28 19.0 <0.750 <0.250 <0.750 35.2 55.5 <0.0835SB-36-6' 6 11/9/2009 <0.750 3.21 108 <0.250 <0.500 8.80 7.71 7.59 3.24 <0.250 7.47 <0.750 <0.250 <0.750 37.3 31.6 <0.0835SB-36-9' 9 11/9/2009 <0.750 4.34 108 0.302 <0.500 15.8 9.42 12.2 3.46 0.336 9.94 <0.750 <0.250 <0.750 47.4 38.6 <0.0835
SB-37-0' 0 11/9/2009 <0.750 1.43 24.8 <0.250 <0.500 10.9 2.55 16.2 7.66 2.19 559 <0.750 <0.250 <0.750 8.50 16.0 <0.0835SB-37-3' 3 11/9/2009 <0.750 3.14 147 0.273 <0.500 8.74 8.23 11.2 12.6 <0.250 54.9 <0.750 <0.250 <0.750 34.5 74.6 <0.0835SB-37-6' 6 11/9/2009 <0.750 4.47 150 0.296 <0.500 10.0 9.06 9.45 4.04 <0.250 15.6 <0.750 <0.250 <0.750 46.0 41.9 <0.0835SB-37-9' 9 11/9/2009 <0.750 4.17 59.5 <0.250 <0.500 11.8 6.11 8.86 2.77 <0.250 9.33 <0.750 <0.250 <0.750 32.9 24.9 <0.0835
SB-38-0' 0 11/9/2009 <0.750 6.35 42.1 <0.250 <0.500 12.6 3.45 34.4 53.2 22.2 32.0 <0.750 <0.250 <0.750 9.78 70.9 <0.0835SB-38-3' 3 11/9/2009 <0.750 3.71 120 0.278 <0.500 8.34 7.74 9.43 6.66 <0.250 12.0 <0.750 <0.250 <0.750 33.9 42.6 <0.0835SB-38-6' 6 11/9/2009 <0.750 4.42 152 0.312 <0.500 11.1 10.0 9.62 3.82 <0.250 7.60 <0.750 <0.250 <0.750 53.1 39.8 <0.0835SB-38-9' 9 11/9/2009 <0.750 2.94 87.6 <0.250 <0.500 7.12 6.43 7.56 2.65 <0.250 5.89 <0.750 <0.250 <0.750 32.7 33.0 <0.0835
SB-39-0' 0 11/9/2009 <0.750 3.14 63.5 <0.250 <0.500 30.2 4.71 28.1 25.9 6.64 291 <0.750 <0.250 <0.750 17.6 56.4 <0.0835SB-39-3' 3 11/9/2009 <0.750 2.95 90.0 <0.250 <0.500 8.81 6.46 7.81 3.34 <0.250 24.7 <0.750 <0.250 <0.750 29.8 28.0 <0.0835SB-39-6' 6 11/9/2009 <0.750 3.79 80.7 <0.250 <0.500 7.75 7.62 6.32 2.74 <0.250 5.45 <0.750 <0.250 <0.750 36.5 26.3 <0.0835SB-39-9' 9 11/9/2009 <0.750 3.01 69.4 <0.250 <0.500 4.51 4.10 6.24 1.87 0.332 3.67 <0.750 <0.250 <0.750 19.1 37.9 <0.0835
SB-39-9' (DUP-6) 9 11/9/2009 <0.750 2.11 40.5 <0.250 <0.500 6.08 4.91 4.52 1.70 0.309 3.89 <0.750 <0.250 <0.750 22.1 19.1 <0.0835
SB-40-0' 0 11/10/2009 <0.750 3.93 106 <0.250 <0.500 15.8 6.20 49.9 70.9 0.890 13.4 <0.750 <0.250 <0.750 21.6 85.4 <0.0835SB-40-3' 3 11/10/2009 <0.750 2.74 88.5 <0.250 <0.500 7.64 6.83 9.74 250 0.938 6.47 <0.750 <0.250 <0.750 27.4 95.5 <0.0835SB-40-6' 6 11/10/2009 <0.750 2.53 94.0 <0.250 <0.500 6.77 6.85 6.17 3.44 <0.250 4.69 <0.750 <0.250 <0.750 29.9 26.3 <0.0835
app a_Historical Data_Lodi MGP.xlsx/A1 4 of 7 4/19/2011
EPA Method 7471A
Sb As Ba Be Cd Cr Co Cu Pb Mo Ni Se Ag Tl V Zn Hgmg/kg mg/kg mg/kg mg/kg mg/kg mg/kg mg/kg mg/kg mg/kg mg/kg mg/kg mg/kg mg/kg mg/kg mg/kg mg/kg mg/kg
Historical Soil Chemical Data - MetalsTABLE A-1
Pacific Gas and Electric Company Former Lodi Manufactured Gas Plant Site712 S. Sacramento Street, Lodi, California
EPA Method 6010BSample ID Depth
(feet) Date
SB-40-9' 9 11/10/2009 <0.750 2.41 65.4 <0.250 <0.500 6.55 5.63 5.39 2.16 <0.250 4.14 <0.750 <0.250 <0.750 26.2 23.5 <0.0835
SB-41-0' 0 11/10/2009 <0.750 1.87 95.2 <0.250 <0.500 6.95 3.52 20.2 17.7 0.301 21.5 <0.750 <0.250 <0.750 13.4 33.8 <0.0835SB-41-3' 3 11/10/2009 <0.750 4.31 112 0.258 <0.500 8.76 8.11 7.99 3.72 <0.250 7.08 <0.750 <0.250 <0.750 37.0 34.0 <0.0835SB-41-6' 6 11/10/2009 <0.750 3.37 146 0.267 <0.500 8.10 8.36 7.78 3.62 <0.250 6.13 <0.750 <0.250 <0.750 38.1 34.7 <0.0835SB-41-9' 9 11/10/2009 <0.750 2.84 38.6 <0.250 <0.500 7.50 3.94 6.05 1.91 <0.250 6.57 <0.750 <0.250 <0.750 23.2 17.2 <0.0835
SB-42-0' 0 11/10/2009 <0.750 1.99 61.0 <0.250 <0.500 5.51 4.30 11.6 16.3 <0.250 5.56 <0.750 <0.250 <0.750 16.5 30.2 <0.0835SB-42-3' 3 11/10/2009 <0.750 2.70 100 <0.250 <0.500 6.64 6.73 6.78 3.43 <0.250 4.80 <0.750 <0.250 <0.750 29.3 28.2 <0.0835SB-42-6' 6 11/10/2009 <0.750 5.75 156 <0.250 <0.500 7.71 11.1 8.04 3.94 <0.250 6.26 <0.750 <0.250 <0.750 49.6 40.6 <0.0835SB-42-9' 9 11/10/2009 <0.750 3.12 48.8 <0.250 <0.500 8.38 5.53 8.00 2.42 <0.250 6.57 <0.750 <0.250 <0.750 25.5 20.7 <0.0835SB-43-0' 0 11/10/2009 <0.750 2.35 123 <0.250 <0.500 6.67 4.55 14.4 99.8 <0.250 10.1 <0.750 <0.250 <0.750 18.8 130 <0.0835SB-43-3' 3 11/10/2009 <0.750 2.45 88.8 <0.250 <0.500 7.16 6.71 6.97 3.77 <0.250 5.01 <0.750 <0.250 <0.750 28.6 37.2 <0.0835SB-43-6' 6 11/10/2009 <0.750 2.40 67.9 <0.250 <0.500 5.52 5.91 5.12 2.06 <0.250 7.56 <0.750 <0.250 <0.750 26.3 39.7 <0.0835SB-43-9' 9 11/10/2009 <0.750 4.26 77.4 <0.250 <0.500 8.67 6.22 7.79 2.71 <0.250 7.18 <0.750 <0.250 <0.750 30.9 23.9 <0.0835
SB-44-0' 0 11/10/2009 <0.750 3.87 74.1 <0.250 <0.500 39.1 10.7 106 36.0 9.70 4,330 <0.750 <0.250 <0.750 19.1 89.5 <0.0835SB-44-3' 3 11/10/2009 <0.750 3.84 84.3 <0.250 <0.500 14.5 9.58 35.7 15.3 3.57 115 <0.750 <0.250 <0.750 35.2 57.7 <0.0835SB-44-6' 6 11/10/2009 <0.750 4.26 138 0.360 <0.500 10.9 11.4 11.4 7.01 <0.250 14.6 <0.750 <0.250 <0.750 47.2 69.7 <0.0835SB-44-9' 9 11/10/2009 <0.750 1.98 52.8 <0.250 <0.500 6.34 5.33 5.11 1.88 <0.250 4.17 <0.750 <0.250 <0.750 23.9 22.2 <0.0835
SB-45-0' 0 11/10/2009 <0.750 1.44 40.4 <0.250 <0.500 4.61 2.69 9.93 13.8 0.413 81.6 <0.750 <0.250 <0.750 9.86 23.5 <0.0835SB-45-3' 3 11/10/2009 <0.750 3.11 136 0.275 <0.500 8.42 8.31 8.62 5.94 <0.250 10.8 <0.750 <0.250 <0.750 36.8 36.9 <0.0835SB-45-6' 6 11/10/2009 <0.750 1.97 77.2 <0.250 <0.500 4.61 4.90 4.55 1.68 <0.250 3.36 <0.750 <0.250 <0.750 21.3 20.7 <0.0835SB-45-9' 9 11/10/2009 <0.750 2.33 56.5 <0.250 <0.500 7.43 4.18 5.98 2.08 <0.250 5.80 <0.750 <0.250 <0.750 19.5 18.5 <0.0835
SB-46-0' 0 11/10/2009 <0.750 10.4 81.3 <0.250 <0.500 58.5 4.99 62.9 52.3 14.3 318 <0.750 <0.250 <0.750 14.8 85.3 <0.0835SB-46-3' 3 11/10/2009 <0.750 2.33 101 0.250 <0.500 7.12 6.92 6.87 3.92 <0.250 5.14 <0.750 <0.250 <0.750 31.5 29.7 <0.0835SB-46-6' 6 11/10/2009 <0.750 3.59 110 <0.250 <0.500 9.43 8.43 8.08 3.05 <0.250 6.06 <0.750 <0.250 <0.750 40.2 32.2 <0.0835SB-46-9' 9 11/10/2009 <0.750 1.61 37.2 <0.250 <0.500 3.83 3.71 4.18 1.47 <0.250 2.63 <0.750 <0.250 <0.750 16.5 16.6 <0.0835
SB-47-0.5' 0.5 7/15/2010 18.6 6.93 415 <0.250 <0.500 11.3 4.75 16.4 222 <0.250 9.56 <0.750 <0.250 <0.750 44.9 86.5 <0.0835SB-47-3' 3 7/15/2010 0.945 1.03 94.9 <0.250 <0.500 7.46 5.03 9.12 5.93 <0.250 4.86 <0.750 <0.250 <0.750 26.5 33.2 <0.0835SB-47-6' 6 7/15/2010 <0.750 1.59 61.9 <0.250 <0.500 5.96 5.88 5.12 2.42 <0.250 4.94 <0.750 <0.250 <0.750 26.9 34.6 <0.0835
SB-48-1.5' 1.5 7/13/2010 <0.750 0.913 92.6 <0.250 <0.500 6.02 19.7 8.52 24.6 <0.250 15.5 <0.750 <0.250 <0.750 30.1 34.5 <0.0835SB-48-3' 3 7/13/2010 <0.750 1.49 112 <0.250 <0.500 8.49 15.3 8.81 7.87 <0.250 7.67 <0.750 <0.250 <0.750 33.6 37.2 <0.0835SB-48-6' 6 7/13/2010 <0.750 2.22 119 <0.250 <0.500 7.99 6.83 7.37 3.38 <0.250 5.55 <0.750 <0.250 <0.750 35.2 36.6 <0.0835SB-49-3' 3 7/13/2010 <0.750 1.19 101 <0.250 <0.500 6.25 5.72 8.20 10.8 <0.250 17.0 <0.750 <0.250 <0.750 30.3 29.4 <0.0835SB-49-4' 4 7/13/2010 <0.750 1.29 86.0 <0.250 <0.500 6.43 6.17 11.7 86.2 <0.250 56.0 <0.750 <0.250 <0.750 56.8 32.8 <0.0835SB-49-6' 6 7/13/2010 <0.750 1.80 80.1 <0.250 <0.500 6.85 6.75 6.11 9.11 <0.250 8.51 <0.750 <0.250 <0.750 31.8 27.4 <0.0835
SB-50-1.5' 1.5 7/13/2010 <0.750 2.10 111 <0.250 <0.500 8.00 6.06 14.9 15.3 <0.250 17.8 <0.750 <0.250 <0.750 30.2 52.9 <0.0835SB-50-3' 3 7/13/2010 <0.750 2.80 97.8 <0.250 <0.500 8.30 8.49 8.32 3.12 <0.250 5.92 <0.750 <0.250 <0.750 36.3 29.3 <0.0835SB-50-6' 6 7/13/2010 <0.750 5.03 125 <0.250 <0.500 8.73 7.51 7.56 3.41 <0.250 5.74 <0.750 <0.250 <0.750 41.7 32.7 <0.0835
SB-51-1.5' 1.5 7/13/2010 <0.750 1.83 68.8 <0.250 <0.500 8.25 5.55 10.5 11.4 <0.250 36.0 <0.750 <0.250 <0.750 28.2 45.3 <0.0835SB-51-3' 3 7/13/2010 <0.750 2.15 124 <0.250 <0.500 8.35 6.57 9.58 6.70 <0.250 7.75 <0.750 <0.250 <0.750 29.7 33.5 <0.0835
SB-51-6.5' 6.5 7/13/2010 <0.750 1.63 61.7 <0.250 <0.500 6.98 5.13 9.81 15.1 <0.250 7.35 <0.750 <0.250 <0.750 20.4 124 <0.0835SB-51-9' 9 7/13/2010 <0.750 3.98 74.0 <0.250 <0.500 9.75 5.70 9.89 3.59 <0.250 7.26 <0.750 <0.250 <0.750 35.3 25.2 <0.0835SB-52-1' 1 7/12/2010 <0.750 1.18 88.2 <0.250 <0.500 5.99 5.20 6.21 6.78 <0.250 4.25 <0.750 <0.250 <0.750 23.2 25.2 <0.0835SB-52-3' 3 7/12/2010 <0.750 2.69 90.7 <0.250 <0.500 7.25 6.52 6.71 4.04 <0.250 4.98 <0.750 <0.250 <0.750 31.2 26.2 <0.0835SB-52-6' 6 7/12/2010 <0.750 2.30 79.4 <0.250 <0.500 7.22 6.85 6.38 2.63 <0.250 4.65 <0.750 <0.250 <0.750 35.9 24.2 <0.0835SB-52-9' 9 7/12/2010 <0.750 4.94 90.4 0.260 <0.500 12.9 6.43 12.3 4.41 <0.250 8.71 <0.750 <0.250 <0.750 40.8 31.1 <0.0835
app a_Historical Data_Lodi MGP.xlsx/A1 5 of 7 4/19/2011
EPA Method 7471A
Sb As Ba Be Cd Cr Co Cu Pb Mo Ni Se Ag Tl V Zn Hgmg/kg mg/kg mg/kg mg/kg mg/kg mg/kg mg/kg mg/kg mg/kg mg/kg mg/kg mg/kg mg/kg mg/kg mg/kg mg/kg mg/kg
Historical Soil Chemical Data - MetalsTABLE A-1
Pacific Gas and Electric Company Former Lodi Manufactured Gas Plant Site712 S. Sacramento Street, Lodi, California
EPA Method 6010BSample ID Depth
(feet) Date
SB-52-15' 15 7/12/2010 <0.750 1.74 79.1 <0.250 <0.500 5.01 5.22 4.19 1.94 <0.250 3.82 <0.750 <0.250 <0.750 21.0 18.9 <0.0835SB-52-20' 20 7/12/2010 <0.750 3.84 56.5 <0.250 <0.500 10.9 5.21 5.58 3.39 <0.250 5.74 <0.750 <0.250 <0.750 32.6 21.9 <0.0835
SB-52-24.5' 24.5 7/12/2010 <0.750 3.18 129 0.422 <0.500 29.4 11.3 13.2 5.89 1.39 12.9 <0.750 <0.250 <0.750 54.1 48.8 <0.0835SB-53-0.5' 0.5 7/12/2010 <0.750 2.59 127 0.261 <0.500 10.4 8.73 13.2 39.1 <0.250 16.8 <0.750 <0.250 <0.750 39.7 109 <0.0835SB-53-3' 3 7/13/2010 <0.750 3.52 112 0.292 <0.500 11.1 9.03 8.78 5.92 <0.250 9.48 <0.750 <0.250 <0.750 44.1 46.2 <0.0835SB-53-6' 6 7/13/2010 <0.750 4.03 79.8 <0.250 <0.500 8.70 7.40 10.6 14.4 <0.250 7.40 <0.750 <0.250 <0.750 38.7 40.6 <0.0835SB-53-9' 9 7/13/2010 <0.750 4.47 104 <0.250 <0.500 10.9 7.99 8.67 4.04 <0.250 15.9 <0.750 <0.250 <0.750 34.8 55.2 <0.0835SB-53-15' 15 7/13/2010 <0.750 2.66 48.2 <0.250 <0.500 5.80 4.90 4.53 2.11 <0.250 4.54 <0.750 <0.250 <0.750 24.7 17.9 <0.0835
SB-53-20.5' 20.5 7/13/2010 <0.750 2.18 67.0 0.272 <0.500 15.4 7.23 5.71 2.27 <0.250 7.79 <0.750 <0.250 <0.750 34.3 15.2 <0.0835SB-53-25' 25 7/13/2010 <0.750 3.19 128 0.327 <0.500 13.1 9.63 8.55 4.35 <0.250 9.17 <0.750 <0.250 <0.750 46.1 34.1 <0.0835SB-54-1' 1 7/12/2010 <0.750 2.87 117 <0.250 <0.500 9.19 5.20 23.7 9.21 <0.250 7.47 <0.750 <0.250 <0.750 54.9 35.9 <0.0835SB-54-3' 3 7/12/2010 0.795 2.35 111 0.257 <0.500 8.79 7.15 11.6 7.95 <0.250 10.1 <0.750 <0.250 <0.750 40.2 50.2 <0.0835SB-54-6' 6 7/12/2010 <0.750 2.22 76.3 <0.250 <0.500 7.36 7.14 9.86 2.82 <0.250 6.94 <0.750 <0.250 <0.750 34.7 46.1 <0.0835SB-54-9' 9 7/12/2010 <0.750 3.44 137 <0.250 <0.500 8.38 9.87 11.0 4.75 <0.250 7.81 <0.750 <0.250 <0.750 46.2 43.7 <0.0835SB-54-15' 15 7/12/2010 1.06 3.75 125 0.292 <0.500 11.5 10.3 9.60 6.26 <0.250 10.5 <0.750 <0.250 <0.750 45.4 42.9 <0.0835SB-54-20' 20 7/12/2010 <0.750 5.48 77.4 0.313 <0.500 15.7 11.6 10.0 4.89 <0.250 11.8 <0.750 <0.250 <0.750 43.2 23.3 <0.0835SB-54-22' 22 7/12/2010 <0.750 1.77 103 0.330 <0.500 14.5 9.92 7.28 3.51 <0.250 9.84 <0.750 <0.250 <0.750 41.6 24.0 <0.0835SB-55-1.5' 1.5 7/13/2010 1.44 1.46 109 <0.250 <0.500 8.80 5.52 7.93 3.75 <0.250 5.07 <0.750 <0.250 <0.750 30.0 36.7 <0.0835SB-55-3' 3 7/13/2010 1.94 2.32 101 <0.250 <0.500 9.59 5.62 8.19 4.04 <0.250 5.22 <0.750 <0.250 <0.750 33.4 37.4 <0.0835SB-55-6' 6 7/13/2010 <0.750 3.23 101 <0.250 <0.500 13.4 9.81 9.61 3.47 0.767 8.03 <0.750 <0.250 <0.750 39.5 47.3 <0.0835SB-55-9' 9 7/13/2010 <0.750 1.06 52.9 <0.250 <0.500 7.93 3.86 6.67 2.75 <0.250 6.35 <0.750 <0.250 <0.750 22.7 24.3 <0.0835SB-55-15' 15 7/13/2010 <0.750 2.63 98.4 0.273 <0.500 10.7 7.46 8.17 4.07 <0.250 7.45 <0.750 <0.250 <0.750 35.5 35.3 <0.0835SB-55-20' 20 7/13/2010 0.798 0.984 58.0 <0.250 <0.500 11.0 4.50 4.39 2.34 <0.250 5.21 <0.750 <0.250 <0.750 26.8 12.2 <0.0835SB-55-25' 25 7/13/2010 <0.750 2.69 159 0.438 <0.500 17.7 16.4 11.5 6.20 <0.250 12.9 <0.750 <0.250 <0.750 52.6 39.9 <0.0835SB-56-0.5' 0.5 7/14/2010 <0.750 2.78 105 <0.250 <0.500 6.66 3.85 7.85 346 <0.250 4.58 <0.750 <0.250 <0.750 23.6 25.5 <0.0835SB-56-3' 3 7/14/2010 1.41 1.83 90.5 <0.250 <0.500 8.42 5.22 7.23 6.96 <0.250 4.60 <0.750 <0.250 <0.750 34.8 33.6 <0.0835SB-56-6' 6 7/14/2010 <0.750 4.35 108 <0.250 <0.500 6.65 8.24 8.67 4.16 <0.250 4.99 <0.750 <0.250 <0.750 41.2 50.1 <0.0835SB-56-9' 9 7/14/2010 <0.750 3.57 64.5 <0.250 <0.500 10.6 5.42 9.64 3.50 <0.250 9.10 <0.750 <0.250 <0.750 33.6 25.3 <0.0835SB-56-15' 15 7/14/2010 <0.750 2.97 133 0.307 <0.500 9.38 9.50 9.11 5.31 <0.250 7.49 <0.750 <0.250 <0.750 42.0 36.2 <0.0835
SB-56-20.5' 20.5 7/14/2010 <0.750 1.19 66.3 <0.250 <0.500 13.7 6.99 6.03 3.58 <0.250 8.37 <0.750 <0.250 <0.750 36.1 18.7 <0.0835SB-56-25' 25 7/14/2010 <0.750 3.25 155 0.327 <0.500 10.8 10.5 8.68 5.17 <0.250 9.71 <0.750 <0.250 <0.750 47.6 40.8 <0.0835
SB-57-20.5 20.5 7/15/2010 <0.750 0.764 70.7 <0.250 <0.500 11.6 5.32 5.29 2.32 <0.250 6.52 <0.750 <0.250 <0.750 26.9 14.3 <0.0835SS-10 0 7/14/2010 -- -- -- -- -- -- -- -- 599 -- -- -- -- -- -- -- --
TP-1-0.5' 0.5 7/12/2010 <0.750 1.44 93.3 <0.250 <0.500 5.91 4.42 7.13 108 <0.250 4.53 <0.750 <0.250 <0.750 19.6 39.6 <0.0835TP-1-3' 3 7/12/2010 <0.750 0.941 88.8 <0.250 <0.500 6.43 6.15 6.70 9.75 <0.250 4.55 <0.750 <0.250 <0.750 27.0 27.2 <0.0835TP-1-6' 6 7/12/2010 <0.750 0.983 53.1 <0.250 <0.500 4.70 4.68 4.70 4.29 <0.250 3.54 <0.750 <0.250 <0.750 21.7 20.1 <0.0835
TP-2-0.5' 0.5 7/12/2010 <0.750 2.12 100 <0.250 <0.500 9.79 6.08 16.4 200 <0.250 10.8 <0.750 <0.250 <0.750 23.1 60.3 <0.0835TP-2-3' 3 7/12/2010 <0.750 1.61 92.3 <0.250 <0.500 7.40 5.99 9.46 39.3 <0.250 5.62 <0.750 <0.250 <0.750 25.5 35.7 <0.0835TP-2-6' 6 7/12/2010 <0.750 1.39 82.4 <0.250 <0.500 8.00 6.38 7.35 28.1 <0.250 5.74 <0.750 <0.250 <0.750 31.8 29.0 <0.0835TP-2-9' 9 7/12/2010 <0.750 0.961 59.5 <0.250 <0.500 6.26 5.62 5.33 8.11 <0.250 4.13 <0.750 <0.250 <0.750 27.7 23.4 <0.0835
TP-3-0.5' 0.5 7/12/2010 <0.750 2.07 110 <0.250 <0.500 7.11 4.57 20.4 347 <0.250 4.79 <0.750 <0.250 <0.750 24.2 61.9 <0.0835TP-3-3' 3 7/12/2010 <0.750 2.08 89.8 <0.250 <0.500 7.41 5.83 8.75 75.1 <0.250 5.32 <0.750 <0.250 <0.750 27.2 35.6 <0.0835TP-3-6' 6 7/12/2010 <0.750 1.55 76.8 <0.250 <0.500 6.81 5.98 6.09 19.9 <0.250 4.66 <0.750 <0.250 <0.750 29.2 25.8 <0.0835
TP-4-0.5' 0.5 7/12/2010 <0.750 0.867 104 <0.250 <0.500 6.35 5.69 7.42 8.68 <0.250 4.76 <0.750 <0.250 <0.750 23.4 32.6 <0.0835TP-4-3' 3 7/12/2010 <0.750 1.47 62.4 <0.250 <0.500 5.81 5.77 4.84 4.69 <0.250 3.78 <0.750 <0.250 <0.750 25.9 21.9 <0.0835TP-4-6' 6 7/12/2010 <0.750 1.73 61.8 <0.250 <0.500 6.33 5.61 5.24 2.83 <0.250 4.28 <0.750 <0.250 <0.750 29.1 21.9 <0.0835
TP-5-0.5' 0.5 7/13/2010 <0.750 0.988 109 <0.250 <0.500 6.53 6.82 8.41 92.7 <0.250 9.24 <0.750 <0.250 <0.750 22.6 50.9 <0.0835
app a_Historical Data_Lodi MGP.xlsx/A1 6 of 7 4/19/2011
EPA Method 7471A
Sb As Ba Be Cd Cr Co Cu Pb Mo Ni Se Ag Tl V Zn Hgmg/kg mg/kg mg/kg mg/kg mg/kg mg/kg mg/kg mg/kg mg/kg mg/kg mg/kg mg/kg mg/kg mg/kg mg/kg mg/kg mg/kg
Historical Soil Chemical Data - MetalsTABLE A-1
Pacific Gas and Electric Company Former Lodi Manufactured Gas Plant Site712 S. Sacramento Street, Lodi, California
EPA Method 6010BSample ID Depth
(feet) Date
TP-5-3' 3 7/13/2010 <0.750 1.17 90.0 <0.250 <0.500 6.92 6.23 6.99 8.92 <0.250 5.19 <0.750 <0.250 <0.750 28.6 29.8 <0.0835TP-5-6' 6 7/13/2010 <0.750 2.62 86.2 <0.250 <0.500 7.28 6.53 6.26 3.10 <0.250 4.73 <0.750 <0.250 <0.750 33.1 25.8 <0.0835
TP-6-0.5' 0.5 7/13/2010 1.13 4.78 123 <0.250 <0.500 11.0 6.75 24.5 701 <0.250 9.38 <0.750 <0.250 <0.750 25.1 185 0.158TP-6-3' 3 7/13/2010 <0.750 1.66 95.3 <0.250 <0.500 7.73 6.78 8.29 57.6 <0.250 5.63 <0.750 <0.250 <0.750 28.5 40.2 <0.0835TP-6-6' 6 7/13/2010 <0.750 1.83 71.3 <0.250 <0.500 7.20 6.48 6.05 8.05 <0.250 4.82 <0.750 <0.250 <0.750 29.4 26.9 <0.0835
TP-7-25S 1.17 7/12/2010 <0.750 <0.750 162 0.331 <0.500 7.06 9.66 8.05 259 <0.250 20.1 <0.750 <0.250 <0.750 26.7 127 <0.0835TP-7-25D 2.67 7/12/2010 <0.750 1.48 109 <0.250 <0.500 7.36 8.46 7.21 22.4 <0.250 6.92 <0.750 <0.250 <0.750 28.6 44.1 <0.0835TP-7-40S 1.17 7/12/2010 <0.750 2.56 106 <0.250 <0.500 7.23 5.47 10.7 11.9 <0.250 3.71 <0.750 <0.250 <0.750 44.6 28.3 <0.0835TP-7-40D 2.67 7/12/2010 <0.750 2.03 103 <0.250 <0.500 10.3 5.54 11.1 4.08 <0.250 4.37 <0.750 <0.250 <0.750 43.0 32.9 <0.0835TP-8-0.5' 0.5 7/13/2010 6.25 2.83 79.5 <0.250 <0.500 7.02 5.32 13.0 250 <0.250 13.4 <0.750 <0.250 <0.750 23.7 75.0 <0.0835TP-8-3' 3 7/13/2010 <0.750 2.03 105 <0.250 <0.500 7.11 6.37 8.46 7.36 <0.250 7.03 <0.750 <0.250 <0.750 29.1 33.9 <0.0835TP-8-6' 6 7/13/2010 <0.750 1.54 97.0 <0.250 <0.500 7.37 8.20 6.79 4.04 <0.250 5.67 <0.750 <0.250 <0.750 35.7 28.6 <0.0835
TP-9-0.5' 0.5 7/13/2010 <0.750 3.30 146 <0.250 <0.500 11.1 8.84 46.2 168 0.361 155 <0.750 <0.250 <0.750 157 107 0.215TP-9-3' 3 7/13/2010 <0.750 2.13 113 <0.250 <0.500 7.26 7.35 14.4 24.9 <0.250 30.7 <0.750 <0.250 <0.750 65.6 42.6 <0.0835TP-9-6' 6 7/13/2010 <0.750 2.00 109 <0.250 <0.500 7.01 6.91 6.70 5.49 <0.250 6.81 <0.750 <0.250 <0.750 36.8 27.2 <0.0835TP-9-9' 9 7/13/2010 <0.750 1.10 75.5 <0.250 <0.500 5.53 5.76 5.79 2.91 <0.250 4.59 <0.750 <0.250 <0.750 28.0 22.0 <0.0835
TP-10-0.5' 0.5 7/13/2010 <0.750 1.69 108 <0.250 <0.500 7.90 6.13 11.4 30.7 <0.250 4.96 <0.750 <0.250 <0.750 30.4 38.3 <0.0835TP-10-3' 3 7/13/2010 <0.750 2.23 99.6 <0.250 <0.500 8.40 6.17 14.6 15.9 <0.250 5.13 <0.750 <0.250 <0.750 31.6 37.6 <0.0835TP-10-6' 6 7/13/2010 <0.750 2.25 105 0.489 <0.500 7.66 9.34 7.90 4.92 <0.250 27.3 <0.750 <0.250 <0.750 34.3 108 <0.0835
TP-11-0.5' 0.5 7/13/2010 <0.750 1.06 71.9 <0.250 <0.500 5.76 5.48 10.0 32.0 <0.250 15.6 <0.750 <0.250 <0.750 23.1 75.7 <0.0835TP-11-3' 3 7/13/2010 <0.750 1.42 109 <0.250 <0.500 6.46 6.19 8.00 9.43 <0.250 6.77 <0.750 <0.250 <0.750 25.7 141 <0.0835TP-11-6' 6 7/13/2010 <0.750 1.49 98.1 <0.250 <0.500 7.12 5.63 6.73 4.47 <0.250 4.84 <0.750 <0.250 <0.750 35.1 99.5 <0.0835TP-11-9' 9 7/13/2010 <0.750 1.16 59.0 <0.250 <0.500 4.32 4.16 4.50 3.20 <0.250 3.21 <0.750 <0.250 <0.750 22.8 39.4 <0.0835AK-1-30" 2.5 7/15/2010 <0.750 0.795 84.4 <0.250 <0.500 6.06 5.81 7.05 39.6 <0.250 6.53 <0.750 <0.250 <0.750 22.3 36.8 <0.0835AK-1-38" 3.17 7/15/2010 <0.750 0.956 83.1 <0.250 <0.500 6.65 6.31 7.50 24.4 <0.250 7.77 <0.750 <0.250 <0.750 23.9 106 <0.0835AK-2-20" 1.7 7/15/2010 <0.750 <0.750 95.3 <0.250 <0.500 5.99 6.23 7.03 31.7 <0.250 4.76 <0.750 <0.250 <0.750 21.8 62.0 <0.0835AK-2-34" 2.83 7/15/2010 <0.750 0.926 62.9 <0.250 <0.500 6.04 4.91 5.59 6.69 <0.250 3.75 <0.750 <0.250 <0.750 23.2 20.7 <0.0835
AK-3-17" 1.42 7/15/2010 <0.750 1.23 81.0 <0.250 0.553 6.79 5.19 6.58 2.77 <0.250 4.66 <0.750 <0.250 <0.750 24.9 334 <0.0835
Table Notes:Bold values represent positive detections.< - Indicates constituent not detected at concentrations equal to or greater than the specified reporting limit.J - Estimated value.
Abbreviations:DUP - Indicates duplicate sample. Sb - Antimony Be - Beryllium Co - Cobalt Mo - Molybdenum Ag - Silver Z - ZincEPA - Environmental Protection Agency As - Arsenic Cd - Cadmium Cu - Copper Ni - Nickel Tl - Thallium Hg - Mercurymg/kg - Milligrams per kilogram Ba - Barium Cr - Chromium Pb - Lead Se - Selenium V - Vanadium
app a_Historical Data_Lodi MGP.xlsx/A1 7 of 7 4/19/2011
EPA Method 5030B/8015BTPH-g TPH-d TPH-momg/kg mg/kg mg/kg
SS-1 0 2/24/2006 <1.0 700 1,000SS-2 0 2/24/2006 <1.0 420 570SS-3 0 2/24/2006 <1.0 4,900 7,700SS-4 0 2/24/2006 <1.0 210 250SS-5 0 2/24/2006 <1.0 280 380SS-6 0 2/24/2006 <1.0 16 19SS-7 0 2/24/2006 <1.0 2,200 3,700SS-8 0 2/24/2006 <1.0 1,700 2,900SS-9 0 2/24/2006 <1.0 910 1,300
SB-1-0' 0 10/15/2008 <0.50 30 65 *SB-1-3' 3 10/15/2008 <0.50 <5.0 <25SB-1-6' 6 10/15/2008 <0.50 <5.0 <25SB-1-9' 9 10/15/2008 <0.50 <5.0 <25
SB-2-0' 0 10/15/2008 <0.50 <5.0 <25SB-2-0' (DUP-6) 0 10/15/2008 <0.50 <5.0 <25
SB-2-3' 3 10/15/2008 <0.50 11 <25SB-2-6' 6 10/15/2008 <0.50 <5.0 <25SB-2-9' 9 10/15/2008 <0.50 <5.0 <25
SB-3-0' 0 10/14/2008 <0.50 200 * 710SB-3-3' 3 10/14/2008 <0.50 200 * 950SB-3-6' 6 10/14/2008 <0.50 90 * 500SB-3-9' 9 10/14/2008 <0.50 <5.0 <25
SB-3-9' (DUP-3) 9 10/14/2008 <0.50 <5.0 <25SB-4-0' 0 10/14/2008 <0.50 980 * 4,600SB-4-3' 3 10/14/2008 <0.50 58 * 210SB-4-6' 6 10/14/2008 <0.50 1,100 * 4,000SB-4-7' 7 10/14/2008 <0.50 220 * 930SB-4-9' 9 10/14/2008 <0.50 <5.0 30SB-5-0' 0 10/15/2008 0.69 2,500 * 7,000SB-5-6' 6 10/15/2008 <0.50 <5.0 <25SB-5-9' 9 10/15/2008 <0.50 <5.0 <25
SB-6-7.5' 7.5 10/14/2008 1.6 * 1,400 * 2,600SB-6-9.5' 9.5 10/14/2008 2,800 42,000 * 29,000SB-6-12.5' 12.5 10/14/2008 34,000 * 77,000 * 45,000
SB-7-0' 0 10/15/2008 330 * 6,200 11,000 *SB-7-3' 3 10/15/2008 <0.50 110 260 *SB-7-6' 6 10/15/2008 17 * 2,600 5,800 *
SB-7-6' (DUP-4) 6 10/15/2008 1.1 * 36 * 98 *SB-7-9' 9 10/15/2008 <0.50 <5.0 <25SB-8-0' 0 10/15/2008 <5.0 <5.0 <25SB-8-3' 3 10/15/2008 <5.0 5.7 <25
SB-8-5.5' 5.5 10/15/2008 12 J 4,100 6,700 *SB-8-6' 6 10/15/2008 <5.0 <5.0 <25SB-8-9' 9 10/15/2008 <5.0 <5.0 <25SB-9-0' 0 10/13/2008 <0.50 940 * 3,000SB-9-3' 3 10/13/2008 <0.50 17 * 39
TABLE A-2
Pacific Gas and Electric Company Former Lodi Manufactured Gas Plant Site712 S. Sacramento Street, Lodi, California
Sample ID DateDepth (feet)
Historical Soil Chemical Data - Petroleum Hydrocarbons
app a_Historical Data_Lodi MGP.xlsx/A2 1 of 8 Stantec Consulting Inc.
EPA Method 5030B/8015BTPH-g TPH-d TPH-momg/kg mg/kg mg/kg
TABLE A-2
Pacific Gas and Electric Company Former Lodi Manufactured Gas Plant Site712 S. Sacramento Street, Lodi, California
Sample ID DateDepth (feet)
Historical Soil Chemical Data - Petroleum Hydrocarbons
SB-9-3' (DUP-1) 3 10/13/2008 <0.50 11 <25SB-9-6' 6 10/13/2008 <0.50 150 * 960 *SB-9-9' 9 10/13/2008 <0.50 <5.0 <25
SB-9-9' (DUP-2) 9.0 10/13/2008 <0.50 53 * 150SB-10-1.5' 1.5 10/15/2008 7.7 J 3,000 7,800 *SB-10-3' 3 10/15/2008 <0.5 220 810 *
SB-10-3' (DUP-5) 3 10/15/2008 <0.5 7.8 26SB-10-6' 6 10/15/2008 <0.50 13 48SB-10-9' 9 10/15/2008 <0.50 <5 <25
SB-11-0' 0.0 10/14/2008 <0.50 390 * 1,500SB-11-3' 3.0 10/14/2008 <0.50 <5.0 27SB-11-6' 6.0 10/14/2008 <0.50 6.5 <25SB-11-9' 9.0 10/14/2008 <0.50 <5.0 <25SB-11-15' 15.0 10/14/2008 <0.50 <5.0 <25SB-12-0' 0.0 10/14/2008 <0.50 540 * 1,600
SB-12-1.5' 1.5 10/14/2008 <0.50 <5.0 <25SB-12-3' 3.0 10/14/2008 <0.50 2,400 * 8,600SB-12-6' 6.0 10/14/2008 <0.50 1,300 * 7,400SB-12-9' 9.0 10/14/2008 <0.50 120 * 290SB-12-12' 12.0 10/14/2008 <0.50 <5.0 <25SB-12-15' 15.0 10/14/2008 <0.50 6.3 <25SB-13-0' 0.0 10/13/2008 <0.50 3,300 * 6,000 *SB-13-3' 3.0 10/13/2008 <0.50 650 * 1,300 *SB-13-6' 6.0 10/13/2008 <0.50 <5.0 <25SB-13-9' 9.0 10/13/2008 <0.50 <5.0 <25SB-14-0' 0.0 10/13/2008 <0.50 2,200 * 7,400SB-14-2' 2.0 10/13/2008 1,100 * 27,000 * 27,000 *SB-14-3' 3.0 10/13/2008 460 * 4,300 * 5,000 *SB-14-6' 6.0 10/13/2008 49 * 770 * 880SB-14-9' 9.0 10/13/2008 <0.50 <5.0 <25SB-15-0' 0.0 10/13/2008 <0.50 3,000 * 9,900SB-15-3' 3.0 10/13/2008 <0.50 3,100 * 8,700SB-15-6' 6.0 10/13/2008 <0.50 490 * 1,400SB-15-9' 9.0 10/13/2008 <0.50 9.5 <25SB-16-1' 1.0 10/13/2008 <0.50 430 * 980 *SB-16-3' 3.0 10/13/2008 <0.50 160 * 820SB-16-6' 6.0 10/13/2008 <0.50 240 * 1,300SB-16-9' 9.0 10/13/2008 <0.50 <5.0 <25SB-17-1' 1 11/5/2009 <0.50 1,900 * 4,900SB-17-18' 18 11/6/2009 450* 7,400 ** 8,000
SB-17-20.5' 20.5 11/6/2009 2,000* 17,000 ** 19,000SB-17-25.5' 25.5 11/6/2009 <0.50 <5.0 <25
SB-18-0' 0 11/4/2009 <0.50 1,800* 6,900SB-18-8' 8 11/4/2009 31* 1,200* 6,000SB-18-16' 16 11/4/2009 8.5* 4,000* 4,600SB-18-26' 26 11/4/2009 <0.50 75* 230
app a_Historical Data_Lodi MGP.xlsx/A2 2 of 8 Stantec Consulting Inc.
EPA Method 5030B/8015BTPH-g TPH-d TPH-momg/kg mg/kg mg/kg
TABLE A-2
Pacific Gas and Electric Company Former Lodi Manufactured Gas Plant Site712 S. Sacramento Street, Lodi, California
Sample ID DateDepth (feet)
Historical Soil Chemical Data - Petroleum Hydrocarbons
SB-18-26' (DUP-1) 26 11/4/2009 <0.50 <5.0 <25SB-18-65' 65 11/4/2009 <0.50 <5.0 <25
SB-19-5' 5 11/5/2009 <0.50 1,500* 2,900SB-19-15.5 15.5 11/5/2009 490* 12,000 ** 12,000SB-19-21' 21 11/5/2009 1,500* 9,200 ** 8,600SB-19-28' 28 11/5/2009 <0.50 7.3* <25
SB-20-0' 0 11/4/2009 <0.50 420* 1,100SB-20-14' 14 11/5/2009 <0.50 <5.0 <25SB-20-20' 20 11/5/2009 8.7* 1,600 ** 1,800
SB-20-66.5' 66.5 11/5/2009 <0.50 <5.0 <25SB-20-66.5' (DUP-4) 66.5 11/5/2009 <0.50 <5.0 <25
SB-21-0' 0 11/3/2009 <0.50 57* 180SB-21-5' 5 11/2/2009 <0.50 <5.0 <25SB-21-10' 10 11/2/2009 <0.50 <5.0 <25
SB-22-0' 0 11/2/2009 <0.50 63* 180SB-22-5' 5 11/2/2009 <0.50 <5.0 <25SB-22-10' 10 11/2/2009 <0.50 <5.0 <25
SB-23-0' 0 11/2/2009 <0.50 2,800* 8,300SB-23-10' 10 11/2/2009 <0.50 <5.0 <25SB-23-12' 12 11/2/2009 <0.50 2,700* 6,800SB-23-15' 15 11/2/2009 <0.50 <5.0 <25
SB-24-0' 0 11/2/2009 <0.50 84* 240SB-24-5' 5 11/2/2009 <0.50 <5.0 <25SB-24-10' 10 11/2/2009 <0.50 12* <25
SB-25-0' 0 11/2/2009 <0.50 1,600* 4,100SB-25-5' 5 11/2/2009 <0.50 <5.0 <25SB-25-10' 10 11/2/2009 <0.50 <5.0 <25
SB-26-0.5' 0.5 11/5/2009 <0.50 210* 680SB-26-5' 5 11/5/2009 <0.50 6.0* <25SB-26-15' 15 11/5/2009 <0.50 <5.0 <25
SB-27-0.5' 0.5 11/5/2009 <0.50 26* 73SB-27-5' 5 11/5/2009 <0.50 7.0* <25
SB-27-10' (DUP-5) 10 11/5/2009 <0.50 <5.0 <25SB-27-15' 15 11/5/2009 <0.50 5.9* <25
SB-28-0.5' 0.5 11/5/2009 <0.50 <5.0 <25SB-28-8' 8 11/5/2009 <0.50 <5.0 <25SB-28-15' 15 11/5/2009 <0.50 5.3* <25
SB-29-0.5' 0.5 11/4/2009 <0.50 7.4* <25SB-29-5' 5 11/4/2009 <0.50 <5.0 <25SB-29-10' 10 11/4/2009 <0.50 <5.0 <25SB-29-13' 13 11/4/2009 <0.50 <5.0 <25
SB-30-0.5' 0.5 11/4/2009 <0.50 15* 41SB-30-5' 5 11/4/2009 <0.50 <5.0 <25
SB-30-5' (DUP-3) 5 11/4/2009 <0.50 <5.0 <25SB-30-10' 10 11/4/2009 <0.50 <5.0 <25
app a_Historical Data_Lodi MGP.xlsx/A2 3 of 8 Stantec Consulting Inc.
EPA Method 5030B/8015BTPH-g TPH-d TPH-momg/kg mg/kg mg/kg
TABLE A-2
Pacific Gas and Electric Company Former Lodi Manufactured Gas Plant Site712 S. Sacramento Street, Lodi, California
Sample ID DateDepth (feet)
Historical Soil Chemical Data - Petroleum Hydrocarbons
SB-30-13' 13 11/4/2009 <0.50 <5.0 <25
SB-31-0.5' 0.5 11/4/2009 <0.50 <5.0 <25SB-31-5' 5 11/4/2009 <0.50 <5.0 <25SB-31-10' 10 11/4/2009 <0.50 <5.0 <25SB-31-15' 15 11/4/2009 <0.50 <5.0 <25
SB-32-0.5' 0.5 11/4/2009 <0.50 22* 50SB-32-5' 5 11/4/2009 <0.50 <5.0 <25SB-32-10' 10 11/4/2009 <0.50 <5.0 <25SB-32-15' 15 11/4/2009 <0.50 <5.0 <25
SB-33-0.5' 0.5 11/4/2009 <0.50 2,200 5,100SB-33-5' 5 11/4/2009 <0.50 <5.0 <25SB-33-10' 10 11/4/2009 <0.50 <5.0 <25SB-33-15' 15 11/4/2009 <0.50 <5.0 <25
SB-34-0' 0 11/3/2009 <0.50 1,900* 7,300SB-34-8' 8 11/3/2009 <0.50 2,200* 5,900SB-34-12' 12 11/3/2009 <0.50 <5.0 <25
SB-34-12' (DUP-1) 12 11/3/2009 <0.50 <5.0 <25
SB-35-0' 0 11/9/2009 <0.50 110* 280SB-35-3' 3 11/9/2009 <0.50 <5.0 <25SB-35-6' 6 11/9/2009 <0.50 <5.0 <25SB-35-9' 9 11/9/2009 <0.50 <5.0 <25
SB-36-0' 0 11/9/2009 <0.50 50* 49SB-36-3' 3 11/9/2009 <0.50 5.4* <25SB-36-6' 6 11/9/2009 <0.50 <5.0 <25SB-36-9' 9 11/9/2009 <0.50 <5.0 <25
SB-37-0' 0 11/9/2009 <0.50 140* 100SB-37-3' 3 11/9/2009 <0.50 43* 130SB-37-6' 6 11/9/2009 <0.50 <5.0 <25SB-37-9' 9 11/9/2009 <0.50 <5.0 <25
SB-38-0' 0 11/9/2009 <0.50 110* 130SB-38-3' 3 11/9/2009 <0.50 7.8* <25SB-38-6' 6 11/9/2009 <0.50 <5.0 <25SB-38-9' 9 11/9/2009 <0.50 <5.0 <25
SB-39-0' 0 11/9/2009 <0.50 48* <25SB-39-3' 3 11/9/2009 <0.50 <5.0 <25SB-39-6' 6 11/9/2009 <0.50 <5.0 <25SB-39-9' 9 11/9/2009 <0.50 <5.0 <25
SB-39-9' (DUP-6) 9 11/9/2009 <0.50 <5.0 <25
SB-40-0' 0 11/10/2009 <0.50 50* 160SB-40-3' 3 11/10/2009 <0.50 190* 360SB-40-6' 6 11/10/2009 <0.50 11 <25SB-40-9' 9 11/10/2009 <0.50 6.7 <25
SB-41-0' 0 11/10/2009 <0.50 410* 1,400SB-41-3' 3 11/10/2009 <0.50 <5.0 <25SB-41-6' 6 11/10/2009 <0.50 <5.0 <25
app a_Historical Data_Lodi MGP.xlsx/A2 4 of 8 Stantec Consulting Inc.
EPA Method 5030B/8015BTPH-g TPH-d TPH-momg/kg mg/kg mg/kg
TABLE A-2
Pacific Gas and Electric Company Former Lodi Manufactured Gas Plant Site712 S. Sacramento Street, Lodi, California
Sample ID DateDepth (feet)
Historical Soil Chemical Data - Petroleum Hydrocarbons
SB-41-9' 9 11/10/2009 <0.50 <5.0 <25
SB-42-0' 0 11/10/2009 <0.50 15 <25SB-42-3' 3 11/10/2009 <0.50 <5.0 <25SB-42-6' 6 11/10/2009 <0.50 <5.0 <25SB-42-9' 9 11/10/2009 <0.50 <5.0 <25
SB-43-0' 0 11/10/2009 <0.50 220* 620SB-43-3' 3 11/10/2009 <0.50 <5.0 <25SB-43-6' 6 11/10/2009 <0.50 <5.0 <25SB-43-9' 9 11/10/2009 <0.50 8.1* <25
SB-44-0' 0 11/10/2009 <0.50 83* 83SB-44-3' 3 11/10/2009 0.93* 46* 80SB-44-6' 6 11/10/2009 <0.50 <5.0 <25SB-44-9' 9 11/10/2009 <0.50 <5.0 <25
SB-45-0' 0 11/10/2009 <0.50 130* 37SB-45-3' 3 11/10/2009 <0.50 6.5 <25SB-45-6' 6 11/10/2009 <0.50 <5.0 <25SB-45-9' 9 11/10/2009 <0.50 <5.0 <25
SB-46-0' 0 11/10/2009 <0.50 58* 150SB-46-3' 3 11/10/2009 <0.50 <5.0 <25SB-46-6' 6 11/10/2009 <0.50 <5.0 <25SB-46-9' 9 11/10/2009 <0.50 <5.0 <25
SB-47-0.5' 0.5 7/15/2010 <0.50 620* 1,400*SB-47-3' 3 7/15/2010 <0.50 25* 100SB-47-6' 6 7/15/2010 <0.50 <5.0 <25
SB-48-1.5' 1.5 7/13/2010 <0.50 400* 1,100*SB-48-3' 3 7/13/2010 <0.50 270* 860*SB-48-6' 6 7/13/2010 <0.50 <5.0 <25
SB-49-3' 3 7/13/2010 <0.50 280* 940*SB-49-4' 4 7/13/2010 2,500* 12,000* 17,000*SB-49-6' 6 7/13/2010 0.55* 18* 45*
SB-50-1.5' 1.5 7/13/2010 <0.50 500* 1,000*SB-50-3' 3 7/13/2010 <0.50 <5.0 <25SB-50-6' 6 7/13/2010 <0.50 <5.0 <25
SB-51-1.5' 1.5 7/13/2010 <0.50 130* 250*SB-51-3' 3 7/13/2010 <0.50 160* 250*
SB-51-6.5' 6.5 7/13/2010 <0.50 12,000* 18,000*SB-51-9' A 9 7/13/2010 <0.50 <5.0 <25
SB-52-1' 1 7/12/2010 <0.50 <5.0 <25SB-52-3' 3 7/12/2010 <0.50 <5.0 <25SB-52-6' 6 7/12/2010 <0.50 <5.0 <25SB-52-9' 9 7/12/2010 <0.50 <5.0 <25SB-52-15' 15 7/12/2010 <0.50 <5.0 <25SB-52-20' 20 7/12/2010 550* 7600 ** 7,400
SB-52-24.5' 24.5 7/12/2010 0.51* 13* 64SB-53-0.5' 0.5 7/12/2010 <0.50 410* 1,300
app a_Historical Data_Lodi MGP.xlsx/A2 5 of 8 Stantec Consulting Inc.
EPA Method 5030B/8015BTPH-g TPH-d TPH-momg/kg mg/kg mg/kg
TABLE A-2
Pacific Gas and Electric Company Former Lodi Manufactured Gas Plant Site712 S. Sacramento Street, Lodi, California
Sample ID DateDepth (feet)
Historical Soil Chemical Data - Petroleum Hydrocarbons
SB-53-3' 3 7/13/2010 <0.50 1,000* 3,700SB-53-6' 6 7/13/2010 <0.50 850* 2,200SB-53-9' 9 7/13/2010 <0.50 8.8* 70SB-53-15' 15 7/13/2010 <0.50 <5.0 <25
SB-53-20.5' 20.5 7/13/2010 340* 2,600 ** 2,700SB-53-25' 25 7/13/2010 <0.50 <5.0 60SB-54-1' 1 7/12/2010 <0.50 <5.0 <25SB-54-3' 3 7/12/2010 <0.50 170* 360SB-54-6' 6 7/12/2010 <0.50 <5.0 <25SB-54-9' 9 7/12/2010 <0.50 160* 410SB-54-15' 15 7/12/2010 270* 3,500 ** 3,300SB-54-20' 20 7/12/2010 460* 4,000 ** 4,000SB-54-22' 22 7/12/2010 330* 3,900 ** 4,600SB-55-1.5' 1.5 7/13/2010 <0.50 <5.0 41SB-55-3' 3 7/13/2010 <0.50 <5.0 <25SB-55-6' 6 7/13/2010 <0.50 <5.0 <25SB-55-9' 9 7/13/2010 <0.50 <5.0 <25SB-55-15' 15 7/13/2010 <0.50 <5.0 <25SB-55-20' 20 7/13/2010 1,000* 7,300 ** 7,300SB-55-25' 25 7/13/2010 <0.50 <5.0 <25
SB-56-0.5' 0.5 7/14/2010 <0.50 740* 1,400*SB-56-3' 3 7/14/2010 <0.50 8.0* 50*SB-56-6' 6 7/14/2010 <0.50 <5.0 <25SB-56-9' 9 7/14/2010 <0.50 <5.0 <25SB-56-15' 15 7/14/2010 <0.50 <5.0 <25
SB-56-20.5' 20.5 7/14/2010 1,000* 11,000 ** 12,000SB-56-25' 25 7/14/2010 <0.50 <5.0 <25
SB-57-20.5 20.5 7/15/2010 <0.50 <5.0 <25
SB-58-0 0 9/22/2010 0.020 770* 2,800SB-58-5 5 9/22/2010 <0.017 <5.0 <25SB-58-10 10 9/22/2010 <0.012 <5.0 <25
SB-59-3 3 9/22/2010 0.150 15,000* 35,000*SB-59-5 5 9/22/2010 <0.015 <5.0 <25SB-59-10 10 9/22/2010 <0.019 <5.0 <25
SB-60-0 0 9/22/2010 0.018 270* 810SB-60-5 5 9/22/2010 <0.010 13* 83SB-60-10 10 9/22/2010 0.013 <5.0 <25
SB-61-0 0 9/22/2010 0.025 27* 96SB-61-5 5 9/22/2010 <0.013 <5.0 <25SB-61-10 10 9/22/2010 <0.017 <5.0 <25
SB-62-0 0 9/22/2010 0.200 6,500* 14,000*SB-62-5 5 9/22/2010 0.180 460* 920*SB-62-10 10 9/22/2010 0.047 <5.0 <25SB-62-15 15 9/23/2010 <0.013 12* <25
SB-63-1 1 9/23/2010 0.110 810* 2,400*SB-63-5 5 9/23/2010 <0.016 <5.0 <25
app a_Historical Data_Lodi MGP.xlsx/A2 6 of 8 Stantec Consulting Inc.
EPA Method 5030B/8015BTPH-g TPH-d TPH-momg/kg mg/kg mg/kg
TABLE A-2
Pacific Gas and Electric Company Former Lodi Manufactured Gas Plant Site712 S. Sacramento Street, Lodi, California
Sample ID DateDepth (feet)
Historical Soil Chemical Data - Petroleum Hydrocarbons
SB-63-10 10 9/23/2010 0.016 6.5* <25SB-63-15 15 9/23/2010 0.019 <5.0 <25
SB-64-1 1 9/22/2010 0.018 570* 1,600*SB-64-5 5 9/22/2010 <0.015 940* 3,300*SB-64-10 10 9/22/2010 <0.013 <5.0 <25SB-64-15 15 9/22/2010 <0.015 14* <25
SB-65-1 1 9/23/2010 <0.013 <5.0 <25SB-65-5 5 9/23/2010 0.025 570* 2,100SB-65-10 10 9/23/2010 <0.013 6.0* <25SB-65-15 15 9/23/2010 <0.014 <5.0 <25
SB-66-0 0 9/23/2010 0.028 15* 28SB-66-5 5 9/23/2010 0.013 <5.0 <25SB-66-10 10 9/23/2010 <0.011 <5.0 <25
SB-67-0 0 9/23/2010 0.120 24* 100SB-67-5 5 9/23/2010 0.044 <5.0 <25SB-67-10 10 9/23/2010 <0.013 <5.0 <25
SB-68-0 0 9/23/2010 0.073 4,300* 7,300SB-68-5 5 9/23/2010 0.026 <5.0 <25SB-68-10 10 9/23/2010 0.025 <5.0 <25
SB-69-0 0 9/23/2010 11 350* 1,200SB-69-5 5 9/23/2010 0.016 <5.0 <25SB-69-10 10 9/23/2010 <0.015 <5.0 <25
TP-1-0.5' 0.5 7/12/2010 <0.50 5.8* 26TP-1-3' 3 7/12/2010 <0.50 <5.0 <25TP-1-6' 6 7/12/2010 <0.50 <5.0 <25
TP-2-0.5' 0.5 7/12/2010 <0.50 42* 110TP-2-3' 3 7/12/2010 <0.50 <5.0 <25TP-2-6' 6 7/12/2010 <0.50 <5.0 <25
TP-2-9' A 9 7/12/2010 <0.50 <5.0 <25
TP-3-0.5' 0.5 7/12/2010 <0.50 410* 880*TP-3-3' 3 7/12/2010 <0.50 27* 68*TP-3-6' 6 7/12/2010 <0.50 18* 45*
TP-4-0.5' 0.5 7/12/2010 <0.50 <5.0 <25TP-4-3' 3 7/12/2010 <0.50 <5.0 <25TP-4-6' 6 7/12/2010 <0.50 <5.0 <25
TP-5-0.5' 0.5 7/13/2010 <0.50 <5.0 <25TP-5-3' 3 7/13/2010 <0.50 <5.0 <25TP-5-6' 6 7/13/2010 <0.50 <5.0 <25
TP-6-0.5' 0.5 7/13/2010 <0.50 72* 170*TP-6-3' 3 7/13/2010 <0.50 <5.0 <25TP-6-6' 6 7/13/2010 <0.50 <5.0 <25
TP-7-25S 1.17 7/12/2010 <0.50 70* 130*TP-7-25D 2.67 7/12/2010 <0.50 5.5* <25TP-7-40S 1.17 7/12/2010 <0.50 7.8* <25TP-7-40D 2.67 7/12/2010 <0.50 <5.0 <25
app a_Historical Data_Lodi MGP.xlsx/A2 7 of 8 Stantec Consulting Inc.
EPA Method 5030B/8015BTPH-g TPH-d TPH-momg/kg mg/kg mg/kg
TABLE A-2
Pacific Gas and Electric Company Former Lodi Manufactured Gas Plant Site712 S. Sacramento Street, Lodi, California
Sample ID DateDepth (feet)
Historical Soil Chemical Data - Petroleum Hydrocarbons
TP-8-0.5' 0.5 7/13/2010 <0.50 520* 1,500*TP-8-3' 3 7/13/2010 <0.50 55* 150*TP-8-6' 6 7/13/2010 <0.50 <5.0 <25
TP-9-0.5' 0.5 7/13/2010 <0.50 490* 1,400*TP-9-3' 3 7/13/2010 <0.50 82* 230*TP-9-6' 6 7/13/2010 <0.50 <5.0 <25
TP-9-9' A 9 7/13/2010 <0.50 22* 45TP-10-0.5' 0.5 7/13/2010 <0.50 <5.0 <25TP-10-3' 3 7/13/2010 <0.50 70* 190*TP-10-6' 6 7/13/2010 <0.50 <5.0 <25
TP-11-0.5' 0.5 7/13/2010 <0.50 700* 1,600*TP-11-3' 3 7/13/2010 <0.50 340* 940*TP-11-6' 6 7/13/2010 <0.50 40* 99*
TP-11-9' A 9 7/13/2010 <0.50 19* 44*AK-1-30" 2.5 7/15/2010 <0.50 15* 43AK-1-38" 3.17 7/15/2010 <0.50 <5.0 <25
AK-2-20" 1.7 7/15/2010 <0.50 <5.0 <25AK-2-34" 2.83 7/15/2010 <0.50 <5.0 <25AK-3-17" 1.42 7/15/2010 <0.50 <5.0 <25
Table Notes:Bold values represent positive detections.* - Indicates chromatographic pattern does not match that of standard.** - Heavier hydrocarbons were also detectedJ - Indicates estimated value higher than the method detection limit, but below the laboratory reporting limit.
May 2008.A - Sample extracted outside recommended hold time.
AbbreviationsDUP - Indicates duplicate sample.EPA - Environmental Protection AgencyTPH-g - Total petroleum hydrocarbons as gasolineTPH-d - Total Petroleum Hydrocarbons as diesel (processed using silica gel cleanup)TPH-mo - Total Petroleum Hydrocarbons as motor oil (processed using silica gel cleanup)
< - Indicates constituent not detected at concentrations equal to or greater than the specified reporting limit.
app a_Historical Data_Lodi MGP.xlsx/A2 8 of 8 Stantec Consulting Inc.
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SS-1 0 2/24/2006 <5.0 <5.0 <5.0 <5.0 <5.0SS-2 0 2/24/2006 <5.0 <5.0 <5.0 <5.0 <5.0SS-3 0 2/24/2006 <5.0 <5.0 <5.0 <5.0 <5.0SS-4 0 2/24/2006 <25 <25 <25 <25 <25SS-5 0 2/24/2006 <25 <25 <25 <25 <25SS-6 0 2/24/2006 <25 <25 <25 <25 <25SS-7 0 2/24/2006 <25 <25 <25 <25 <25SS-8 0 2/24/2006 <25 <25 <25 <25 <25SS-9 0 2/24/2006 <25 <25 <25 <25 <25
SB-1-0' 0 10/15/2008 <5 <5 <5 <5 <5SB-1-3' 3 10/15/2008 <5 <5 <5 <5 <5SB-1-6' 6 10/15/2008 <5 <5 <5 <5 <5SB-1-9' 9 10/15/2008 <5 <5 <5 <5 <5
SB-2-0' 0 10/15/2008 <5 <5 <5 <5 <5SB-2-0' (DUP-6) 0 10/15/2008 <5 <5 <5 <5 <5
SB-2-3' 3 10/15/2008 <5 <5 <5 <5 <5SB-2-6' 6 10/15/2008 <5 <5 <5 <5 <5SB-2-9' 9 10/15/2008 <5 <5 <5 <5 <5
SB-3-0' 0 10/14/2008 <5 <5 <5 <5 <5SB-3-3' 3 10/14/2008 <5 <5 <5 <5 <5SB-3-6' 6 10/14/2008 <5 <5 <5 <5 <5SB-3-9' 9 10/14/2008 <5 <5 <5 <5 <5
SB-3-9' (DUP-3) 9 10/14/2008 <5 <5 <5 <5 <5
SB-4-0' 0 10/14/2008 <5 <5 <5 <5 <5SB-4-3' 3 10/14/2008 <5 <5 <5 <5 <5SB-4-6' 6 10/14/2008 9.5 <5 <5 <5 <5SB-4-7' 7 10/14/2008 <5 <5 <5 <5 <5SB-4-9' 9 10/14/2008 <5 <5 <5 <5 <5
SB-5-0' 0 10/15/2008 23 <5 18 9.9 <5SB-5-6' 6 10/15/2008 <5 <5 <5 <5 <5SB-5-9' 9 10/15/2008 <5 <5 <5 <5 <5
SB-6-7.5' 7.5 10/14/2008 140 <5 <5 <5 <5SB-6-9.5' 9.5 10/14/2008 2,700,000 50,000 <500,000 58,000 19,000SB-6-12.5' 12.5 10/14/2008 3,700,000 40,000 <500,000 84,000 28,000
SB-7-0' 0 10/15/2008 <5 <5 <5 <5 <5SB-7-3' 3 10/15/2008 <5 <5 <5 <5 <5SB-7-6' 6 10/15/2008 <5 <5 <5 <5 <5
SB-7-6' (DUP-4) 6 10/15/2008 <5 <5 <5 <5 <5SB-7-9' 9 10/15/2008 <5 <5 <5 <5 <5
SB-8-0' 0 10/15/2008 <5 <5 <5 <5 <5SB-8-3' 3 10/15/2008 <5 <5 <5 <5 <5
SB-8-5.5' 5.5 10/15/2008 <5 <5 <5 <5 <5SB-8-6' 6 10/15/2008 <5 <5 <5 <5 <5SB-8-9' 9 10/15/2008 <5 <5 <5 <5 <5
TABLE A-3Historical Soil Chemical Data - BTEX
Pacific Gas and Electric Company Former Manufactured Gas Site712 S. Sacramento Street, Lodi, California
Sample IDDepth(feet)
BTEX (ug/kg)EPA Method 5030B/8260B
Date
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TABLE A-3Historical Soil Chemical Data - BTEX
Pacific Gas and Electric Company Former Manufactured Gas Site712 S. Sacramento Street, Lodi, California
Sample IDDepth(feet)
BTEX (ug/kg)EPA Method 5030B/8260B
DateSB-9-0' 0 10/13/2008 <5 <5 <5 <5 <5SB-9-3' 3 10/13/2008 <5 <5 <5 <5 <5
SB-9-3' (DUP-1) 3 10/13/2008 <5 <5 <5 <5 <5SB-9-6' 6 10/13/2008 <5 <5 <5 <5 <5SB-9-9' 9 10/13/2008 <5 <5 <5 <5 <5
SB-9-9' (DUP-2) 9 10/13/2008 <5 <5 <5 <5 <5
SB-10-1.5' 1.5 10/15/2008 <5 <5 <5 <5 <5SB-10-3' 3 10/15/2008 <5 <5 <5 <5 <5
SB-10-3' (DUP-5) 3 10/15/2008 <5 <5 <5 <5 <5SB-10-6' 6 10/15/2008 <5 <5 <5 <5 <5SB-10-9' 9 10/15/2008 <5 <5 <5 <5 <5
SB-11-0' 0 10/14/2008 22 <5 <5 <5 <5SB-11-3' 3 10/14/2008 17 <5 <5 <5 <5SB-11-6' 6 10/14/2008 6.3 <5 <5 <5 <5SB-11-9' 9 10/14/2008 <5 <5 <5 <5 <5SB-11-15' 15 10/14/2008 <5 <5 <5 <5 <5
SB-12-0' 0 10/14/2008 16 <5 <5 <5 <5SB-12-1.5' 1.5 10/14/2008 <5 <5 <5 <5 <5SB-12-3' 3 10/14/2008 <5 <5 <5 <5 <5SB-12-6' 6 10/14/2008 7.7 <5 6.8 <5 <5SB-12-9' 9 10/14/2008 <5 <5 <5 <5 <5SB-12-12' 12 10/14/2008 <5 <5 <5 <5 <5SB-12-15' 15 10/14/2008 <5 <5 <5 <5 <5
SB-13-0' 0 10/13/2008 <500* <500* <500* <500* <500*SB-13-3' 3 10/13/2008 <500* <500* <500* <500* <500*SB-13-6' 6 10/13/2008 <5 <5 <5 <5 <5SB-13-9' 9 10/13/2008 <5 <5 <5 <5 <5
SB-14-0' 0 10/13/2008 <500* <500* <500* <500* <500*SB-14-2' 2 10/13/2008 <5,000* <5,000* <5,000* <5,000* <5,000*SB-14-3' 3 10/13/2008 <5,000* <5,000* <5,000* <5,000* <5,000*SB-14-6' 6 10/13/2008 <500* <500* <500* <500* <500*SB-14-9' 9 10/13/2008 <5 <5 <5 <5 <5
SB-15-0' 0 10/13/2008 <500* <500* <500* <500* <500*SB-15-3' 3 10/13/2008 <500* <500* <500* <500* <500*SB-15-6' 6 10/13/2008 <5 <5 <5 <5 <5SB-15-9' 9 10/13/2008 <5 <5 <5 <5 <5
SB-16-1' 1 10/13/2008 <5 <5 <5 <5 <5SB-16-3' 3 10/13/2008 <5 <5 <5 <5 <5SB-16-6' 6 10/13/2008 <5 <5 <5 <5 <5SB-16-9' 9 10/13/2008 <5 <5 <5 <5 <5
SB-17-1' 1 11/5/2009 <1.0 <1.0 <1.0 <2.1 <1.0SB-17-18' 18 11/6/2009 <47 110 <47 <94 <47
SB-17-20.5' 20.5 11/6/2009 <48 2,200 <48 97 360SB-17-25.5' 25.5 11/6/2009 <1.0 <1.0 <1.0 <2.0 <1.0
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TABLE A-3Historical Soil Chemical Data - BTEX
Pacific Gas and Electric Company Former Manufactured Gas Site712 S. Sacramento Street, Lodi, California
Sample IDDepth(feet)
BTEX (ug/kg)EPA Method 5030B/8260B
DateSB-18-0' 0 11/4/2009 <0.79 <0.79 <0.79 <1.6 <0.79SB-18-8' 8 11/4/2009 <0.66 <0.66 <0.66 <1.3 <0.66SB-18-16' 16 11/4/2009 <120 <120 <120 <250 <120SB-18-26' 26 11/4/2009 <0.54 <0.54 <0.54 <1.1 <0.54
SB-18-26' (DUP-1) 26 11/4/2009 <0.85 <0.85 <0.85 <1.7 <0.85SB-18-65' 65 11/4/2009 <0.40 <0.40 <0.40 <0.80 <0.40
SB-19-5' 5 11/5/2009 <0.92 <0.92 <0.92 <1.8 <0.92SB-19-15.5 15.5 11/5/2009 <55 920 <55 <110 62SB-19-21' 21 11/5/2009 450 7,500 <40 690 210SB-19-28' 28 11/5/2009 <1.1 <1.1 <1.1 <2.1 <1.1
SB-20-0' 0 11/4/2009 4.7 <0.64 <0.64 <1.3 <0.64SB-20-14' 14 11/5/2009 <0.73 <0.73 <0.73 <1.5 <0.73SB-20-20' 20 11/5/2009 <0.43 9.3 <0.43 <0.86 1.1
SB-20-66.5' 66.5 11/5/2009 <0.78 <0.78 <0.78 <1.6 <0.78SB-20-66.5' (DUP-4) 66.5 11/5/2009 <0.86 <0.86 <0.86 <1.7 <0.86
SB-21-0' 0 11/3/2009 0.77 <0.60 0.62 <1.2 <0.60SB-21-5' 5 11/2/2009 <0.90 <0.90 <0.90 <1.8 <0.90SB-21-10' 10 11/2/2009 <0.78 <0.78 <0.78 <1.6 <0.78
SB-22-0' 0 11/2/2009 1.8 <0.56 <0.56 <1.1 <0.56SB-22-5' 5 11/2/2009 <0.56 <0.56 <0.56 <1.1 <0.56SB-22-10' 10 11/2/2009 <0.62 <0.62 <0.62 <1.2 <0.62
SB-23-0' 0 11/2/2009 1.2 <0.71 1.9 <1.4 <0.71SB-23-10' 10 11/2/2009 <0.69 <0.69 <0.69 <1.4 <0.69SB-23-12' 12 11/2/2009 <0.64 <0.64 0.83 <1.3 <0.64SB-23-15' 15 11/2/2009 <0.83 <0.83 <0.83 <1.7 <0.83
SB-24-0' 0 11/2/2009 <0.86 <0.86 <0.86 <1.7 <0.86SB-24-5' 5 11/2/2009 <0.74 <0.74 <0.74 <1.5 <0.74SB-24-10' 10 11/2/2009 <0.57 <0.57 <0.57 <1.1 <0.57
SB-25-0' 0 11/2/2009 35 <0.67 2.5 <1.3 <0.67SB-25-5' 5 11/2/2009 <0.42 <0.42 <0.42 <0.85 <0.42SB-25-10' 10 11/2/2009 <0.42 <0.42 <0.42 <0.85 <0.42
SB-26-0.5' 0.5 11/5/2009 <0.92 <0.92 <0.92 <1.8 <0.92SB-26-5' 5 11/5/2009 <0.81 <0.81 <0.81 <1.6 <0.81SB-26-15' 15 11/5/2009 <0.83 <0.83 <0.83 <1.7 <0.83
SB-27-0.5' 0.5 11/5/2009 <0.87 <0.87 <0.87 <1.7 <0.87SB-27-5' 5 11/5/2009 <0.77 <0.77 <0.77 <1.5 <0.77
SB-27-10' (DUP-5) 10 11/5/2009 <0.91 <0.91 <0.91 <1.8 <0.91SB-27-15' 15 11/5/2009 <0.80 <0.80 <0.80 <1.6 <0.80
SB-28-0.5' 0.5 11/5/2009 <0.92 <0.92 <0.92 <1.8 <0.92SB-28-8' 8 11/5/2009 <0.90 <0.90 <0.90 <1.8 <0.90SB-28-15' 15 11/5/2009 <1.0 <1.0 <1.0 <2.0 <1.0SB-29-0.5' 0.5 11/4/2009 <0.87 <0.87 <0.87 <1.7 <0.87SB-29-5' 5 11/4/2009 <0.77 <0.77 <0.77 <1.5 <0.77
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TABLE A-3Historical Soil Chemical Data - BTEX
Pacific Gas and Electric Company Former Manufactured Gas Site712 S. Sacramento Street, Lodi, California
Sample IDDepth(feet)
BTEX (ug/kg)EPA Method 5030B/8260B
DateSB-29-10' 10 11/4/2009 <0.78 <0.78 <0.78 <1.6 <0.78SB-29-13' 13 11/4/2009 <0.74 <0.74 <0.74 <1.5 <0.74
SB-30-0.5' 0.5 11/4/2009 <0.91 <0.91 <0.91 <1.8 <0.91SB-30-5' 5 11/4/2009 <0.83 <0.83 <0.83 <1.7 <0.83
SB-30-5' (DUP-3) 5 11/4/2009 <0.87 <0.87 <0.87 <1.7 <0.87SB-30-10' 10 11/4/2009 <0.83 <0.83 <0.83 <1.7 <0.83SB-30-13' 13 11/4/2009 <0.84 <0.84 <0.84 <1.7 <0.84
SB-31-0.5' 0.5 11/4/2009 <0.84 <0.84 <0.84 <1.7 <0.84SB-31-5' 5 11/4/2009 <0.75 <0.75 <0.75 <1.5 <0.75SB-31-10' 10 11/4/2009 <0.77 <0.77 <0.77 <1.5 <0.77SB-31-15' 15 11/4/2009 <1.2 <1.2 <1.2 <2.4 <1.2
SB-32-0.5' 0.5 11/4/2009 <0.86 <0.86 <0.86 <1.7 <0.86SB-32-5' 5 11/4/2009 <0.89 <0.89 <0.89 <1.8 <0.89SB-32-10' 10 11/4/2009 <0.82 <0.82 <0.82 <1.6 <0.82SB-32-15' 15 11/4/2009 <0.88 <0.88 <0.88 <1.8 <0.88
SB-33-0.5' 0.5 11/4/2009 51 <0.76 3.5 <1.5 <0.76SB-33-5' 5 11/4/2009 <0.76 <0.76 <0.76 <1.5 <0.76SB-33-10' 10 11/4/2009 <0.84 <0.84 <0.84 <1.7 <0.84SB-33-15' 15 11/4/2009 <0.83 <0.83 <0.83 <1.7 <0.83
SB-34-0' 0 11/3/2009 3.8 <0.63 <0.63 <1.3 <0.63SB-34-8' 8 11/3/2009 <0.86 <0.86 <0.86 <1.7 <0.86SB-34-12' 12 11/3/2009 <0.80 <0.80 <0.80 <1.6 <0.80
SB-34-12' (DUP-2) 12 11/3/2009 <0.58 <0.58 <0.58 <1.2 <0.58
SB-35-0' 0 11/9/2009 3.2 <1.2 <1.2 <2.3 <1.2SB-35-3' 3 11/9/2009 <0.93 <0.93 <0.93 <1.9 <0.93SB-35-6' 6 11/9/2009 <0.85 <0.85 <0.85 <1.7 <0.85SB-35-9' 9 11/9/2009 <0.78 <0.78 <0.78 <1.6 <0.78
SB-36-0' 0 11/9/2009 1.5 <1.2 <1.2 <2.3 <1.2SB-36-3' 3 11/9/2009 <1.2 <1.2 <1.2 <2.5 <1.2SB-36-6' 6 11/9/2009 <0.91 <0.91 <0.91 <1.8 <0.91SB-36-9' 9 11/9/2009 <0.98 <0.98 <0.98 <2.0 <0.98
SB-37-0' 0 11/9/2009 1.4 <1.1 <1.1 <2.1 <1.1SB-37-3' 3 11/9/2009 1.3 <1.1 <1.1 <2.2 <1.1SB-37-6' 6 11/9/2009 <0.96 <0.96 <0.96 <1.9 <0.96SB-37-9' 9 11/9/2009 <1.0 <1.0 <1.0 <2.0 <1.0
SB-38-0' 0 11/9/2009 1.7 <0.95 <0.95 <1.9 <0.95SB-38-3' 3 11/9/2009 <1.1 <1.1 <1.1 <2.2 <1.1SB-38-6' 6 11/9/2009 <1.1 <1.1 <1.1 <2.1 <1.1SB-38-9' 9 11/9/2009 <1.0 <1.0 <1.0 <2.0 <1.0
SB-39-0' 0 11/9/2009 <1.1 <1.1 <1.1 <2.2 <1.1SB-39-3' 3 11/9/2009 <1.0 <1.0 <1.0 <2.1 <1.0SB-39-6' 6 11/9/2009 <1.0 <1.0 <1.0 <2.0 <1.0SB-39-9' 9 11/9/2009 <1.1 <1.1 <1.1 <2.1 <1.1
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TABLE A-3Historical Soil Chemical Data - BTEX
Pacific Gas and Electric Company Former Manufactured Gas Site712 S. Sacramento Street, Lodi, California
Sample IDDepth(feet)
BTEX (ug/kg)EPA Method 5030B/8260B
DateSB-39-9' (DUP-6) 9 11/9/2009 <1.1 <1.1 <1.1 <2.1 <1.1
SB-40-0' 0 11/10/2009 1.1 <1.1 1.3 <2.1 <1.1SB-40-3' 3 11/10/2009 2.2 <1.2 <1.2 <2.4 <1.2SB-40-6' 6 11/10/2009 <0.97 <0.97 <0.97 <1.9 <0.97SB-40-9' 9 11/10/2009 <0.95 <0.95 <0.95 <1.9 <0.95
SB-41-0' 0 11/10/2009 1.7 <1.0 <1.0 <2.0 <1.0SB-41-3' 3 11/10/2009 <0.85 <0.85 <0.85 <1.7 <0.85SB-41-6' 6 11/10/2009 <0.99 <0.99 <0.99 <2.0 <0.99SB-41-9' 9 11/10/2009 <0.89 <0.89 <0.89 <1.8 <0.89
SB-42-0' 0 11/10/2009 3.4 <1.1 1.3 <2.2 <1.1SB-42-3' 3 11/10/2009 <0.95 <0.95 <0.95 <1.9 <0.95SB-42-6' 6 11/10/2009 <0.80 <0.80 <0.80 <1.6 <0.80SB-42-9' 9 11/10/2009 <0.86 <0.86 <0.86 <1.7 <0.86
SB-43-0' 0 11/10/2009 9.0 <0.97 1.0 <1.9 <0.97SB-43-3' 3 11/10/2009 <1.0 <1.0 <1.0 <2.1 <1.0SB-43-6' 6 11/10/2009 <0.92 <0.92 <0.92 <1.8 <0.92SB-43-9' 9 11/10/2009 <0.97 <0.97 <0.97 <1.9 <0.97
SB-44-0' 0 11/10/2009 <47 <47 67 <94 <47SB-44-3' 3 11/10/2009 <0.98 <0.98 <0.98 <2.0 <0.98SB-44-6' 6 11/10/2009 <1.0 <1.0 <1.0 <2.0 <1.0SB-44-9' 9 11/10/2009 <0.99 <0.99 <0.99 <2.0 <0.99
SB-45-0' 0 11/10/2009 1.9 <1.1 1.2 <2.2 <1.1SB-45-3' 3 11/10/2009 <1.2 <1.2 <1.2 <2.4 <1.2SB-45-6' 6 11/10/2009 <0.86 <0.86 <0.86 <1.7 <0.86SB-45-9' 9 11/10/2009 <0.88 <0.88 <0.88 <1.8 <0.88
SB-46-0' 0 11/10/2009 3.0 <0.99 1.9 <2.0 <0.99SB-46-3' 3 11/10/2009 <1.1 <1.1 <1.1 <2.2 <1.1SB-46-6' 6 11/10/2009 <0.93 <0.93 <0.93 <1.9 <0.93SB-46-9' 9 11/10/2009 <0.83 <0.83 <0.83 <1.7 <0.83
SB-47-0.5' 0.5 7/15/2010 <0.69 <0.69 <0.69 <1.4 <0.69SB-47-3' 3 7/15/2010 <0.84 <0.84 <0.84 <1.7 <0.84SB-47-6' 6 7/15/2010 <0.75 <0.75 <0.75 <1.5 <0.75
SB-48-1.5' 1.5 7/13/2010 1.6 <0.61 <0.61 <1.2 <0.61SB-48-3' 3 7/13/2010 <1.0 <1.0 <1.0 <2.0 <1.0SB-48-6' 6 7/13/2010 <0.54 <0.54 <0.54 <1.1 <0.54
SB-49-3' 3 7/13/2010 1.0 <0.55 <0.55 <1.1 <0.55SB-49-4' 4 7/13/2010 810 640 990 1,100 470SB-49-6' 6 7/13/2010 <0.61 <0.61 <0.61 <1.2 <0.61
SB-50-1.5' 1.5 7/13/2010 <30 <0.73 <0.73 <1.5 <0.73SB-50-3' 3 7/13/2010 <0.64 <0.64 <0.64 <1.3 <0.64SB-50-6' 6 7/13/2010 <0.66 <0.66 <0.66 <1.3 <0.66
SB-51-1.5' 1.5 7/13/2010 13 <0.58 0.73 <1.2 <0.58SB-51-3' 3 7/13/2010 3.4 <0.62 <0.62 <1.2 <0.62
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TABLE A-3Historical Soil Chemical Data - BTEX
Pacific Gas and Electric Company Former Manufactured Gas Site712 S. Sacramento Street, Lodi, California
Sample IDDepth(feet)
BTEX (ug/kg)EPA Method 5030B/8260B
DateSB-51-6.5' 6.5 7/13/2010 5.4 <0.52 <0.52 <1.0 <0.52SB-51-9' A 9 7/13/2010 <0.71 <0.71 <0.71 <1.4 <0.71
SB-52-1' 1 7/12/2010 <0.69 <0.69 <0.69 <1.4 <0.69SB-52-3' 3 7/12/2010 <0.74 <0.74 <0.74 <1.5 <0.74SB-52-6' 6 7/12/2010 <0.59 <0.59 <0.59 <1.2 <0.59SB-52-9' 9 7/12/2010 <0.52 <0.52 <0.52 <1.0 <0.52SB-52-15' 15 7/12/2010 <0.53 <0.53 <0.53 <1.1 <0.53SB-52-20' 20 7/12/2010 <24* <24* <24* <49* <24*
SB-52-24.5' 24.5 7/12/2010 <0.53 <0.53 <0.53 <1.1 <0.53
SB-53-0.5' 0.5 7/12/2010 <0.58 <0.58 <0.58 <1.2 <0.58SB-53-3' 3 7/13/2010 <0.52 <0.52 <0.52 <1.0 <0.52SB-53-6' 6 7/13/2010 <0.56 <0.56 <0.56 <1.1 <0.56SB-53-9' 9 7/13/2010 <0.76 <0.76 <0.76 <1.5 <0.76SB-53-15' 15 7/13/2010 <0.62 <0.62 <0.62 <1.2 <0.62
SB-53-20.5' 20.5 7/13/2010 <30 85 <30 <59 <30SB-53-25' 25 7/13/2010 <0.63 <0.63 <0.63 <1.3 <0.63SB-54-1' 1 7/12/2010 <0.78 <0.78 <0.78 <1.6 <0.78SB-54-3' 3 7/12/2010 <0.62 <0.62 <0.62 <1.2 <0.62SB-54-6' 6 7/12/2010 <0.60 <0.60 <0.60 <1.2 <0.60SB-54-9' 9 7/12/2010 <0.67 <0.67 <0.67 <1.3 <0.67SB-54-15' 15 7/12/2010 <34* <34* <34* <67* <34*SB-54-20' 20 7/12/2010 <0.52 27 <0.52 <1.0 1.8SB-54-22' 22 7/12/2010 <26 710 <26 <52 78SB-55-1.5' 1.5 7/13/2010 <0.43 <0.43 <0.43 <0.86 <0.43SB-55-3' 3 7/13/2010 <0.57 <0.57 <0.57 <1.1 <0.57SB-55-6' 6 7/13/2010 <0.83 <0.83 <0.83 <1.7 <0.83SB-55-9' 9 7/13/2010 <0.68 <0.68 <0.68 <1.4 <0.68SB-55-15' 15 7/13/2010 <0.77 <0.77 <0.77 <1.5 <0.77SB-55-20' 20 7/13/2010 <26 240 <26 <52 41SB-55-25' 25 7/13/2010 <0.64 <0.64 <0.64 <1.3 <0.64
SB-56-0.5' 0.5 7/14/2010 <0.76 <0.76 <0.76 <1.5 <0.76SB-56-3' 3 7/14/2010 <0.66 <0.66 <0.66 <1.3 <0.66SB-56-6' 6 7/14/2010 <0.58 <0.58 <0.58 <1.2 <0.58SB-56-9' 9 7/14/2010 <0.87 <0.87 <0.87 <1.7 <0.87SB-56-15' 15 7/14/2010 <1.3 <1.3 <1.3 <2.5 <1.3
SB-56-20.5' 20.5 7/14/2010 <41* <41* <41* <82* <41*SB-56-25' 25 7/14/2010 <0.90 <0.90 <0.90 <1.8 <0.90
SB-57-20.5' 20.5 7/15/2010 <0.89 <0.89 <0.89 <1.8 <0.89
SB-58-0 0 9/22/2010 0.81 <0.21 <0.21 <0.42 <0.21SB-58-5 5 9/22/2010 <0.34 <0.34 <0.34 <0.67 <0.34SB-58-10 10 9/22/2010 <0.24 <0.24 <0.24 <0.49 <0.24
SB-59-3 3 9/22/2010 7.3 <0.55 0.64 <1.1 <0.55SB-59-5 5 9/22/2010 <0.30 <0.30 <0.30 <0.60 <0.30SB-59-10 10 9/22/2010 <0.38 <0.38 <0.38 <0.75 <0.38
6 of 8
Benz
ene
Ethy
lben
zene
Tolu
ene
Xyle
ne (p
/m)
Xyle
ne (o
)
TABLE A-3Historical Soil Chemical Data - BTEX
Pacific Gas and Electric Company Former Manufactured Gas Site712 S. Sacramento Street, Lodi, California
Sample IDDepth(feet)
BTEX (ug/kg)EPA Method 5030B/8260B
DateSB-60-0 0 9/22/2010 <0.28 <0.28 <0.28 <0.56 <0.28SB-60-5 5 9/22/2010 <0.21 <0.21 <0.21 <0.42 <0.21SB-60-10 10 9/22/2010 <0.22 <0.22 <0.22 <0.45 <0.22
SB-61-0 0 9/22/2010 <0.35 <0.35 <0.35 <0.70 <0.35SB-61-5 5 9/22/2010 <0.26 <0.26 <0.26 <0.53 <0.26SB-61-10 10 9/22/2010 <0.35 <0.35 <0.35 <0.69 <0.35
SB-62-0 0 9/22/2010 5.7 <0.38 7.2 1.0 <0.38SB-62-5 5 9/22/2010 0.75 <0.43 <0.43 <0.85 <0.43SB-62-10 10 9/22/2010 <0.35 <0.35 <0.35 <0.69 <0.35SB-62-15 15 9/23/2010 <0.25 <0.25 <0.25 <0.51 <0.25
SB-63-1 1 9/23/2010 2.0 <0.43 <0.43 <0.86 <0.43SB-63-5 5 9/23/2010 <0.31 <0.31 <0.31 <0.62 <0.31SB-63-10 10 9/23/2010 <0.30 <0.30 <0.30 <0.59 <0.30SB-63-15 15 9/23/2010 <0.34 <0.34 <0.34 <0.67 <0.34
SB-64-1 1 9/22/2010 0.35 <0.30 <0.30 <0.61 <0.30SB-64-5 5 9/22/2010 0.38 <0.30 <0.30 <0.60 <0.30SB-64-10 10 9/22/2010 <0.25 <0.25 <0.25 <0.51 <0.25SB-64-15 15 9/22/2010 <0.31 <0.31 <0.31 <0.62 <0.31
SB-65-1 1 9/23/2010 1.0 <0.27 <0.27 <0.53 <0.27SB-65-5 5 9/23/2010 1.8 <0.34 <0.34 <0.69 <0.34SB-65-10 10 9/23/2010 <0.27 <0.27 <0.27 <0.54 <0.27SB-65-15 15 9/23/2010 <0.28 <0.28 <0.28 <0.57 <0.28
SB-66-0 0 9/23/2010 <0.24 <0.24 <0.24 <0.49 <0.24SB-66-5 5 9/23/2010 <0.25 <0.25 <0.25 <0.51 <0.25SB-66-10 10 9/23/2010 <0.22 <0.22 <0.22 <0.43 <0.22
SB-67-0 0 9/23/2010 <0.34 <0.34 6.0 <0.68 <0.34SB-67-5 5 9/23/2010 <0.37 <0.37 <0.37 <0.75 <0.37SB-67-10 10 9/23/2010 <0.27 <0.27 <0.27 <0.54 <0.27
SB-68-0 0 9/23/2010 1.1 <0.38 3.4 1.3 0.58SB-68-5 5 9/23/2010 <0.29 <0.29 0.76 <0.58 <0.29SB-68-10 10 9/23/2010 0.33 <0.28 0.65 <0.56 <0.28
SB-69-0 0 9/23/2010 86 61 990 390 170SB-69-5 5 9/23/2010 <0.27 <0.27 4.9 0.70 <0.27SB-69-10 10 9/23/2010 <0.30 <0.30 0.70 <0.60 <0.30
TP-1-0.5' 0.5 7/12/2010 <0.90 <0.90 <0.90 <1.8 <0.90TP-1-3' 3 7/12/2010 <0.92 <0.92 <0.92 <1.8 <0.92TP-1-6' 6 7/12/2010 <1.1 <1.1 <1.1 <2.2 <1.1
TP-2-0.5' 0.5 7/12/2010 <1.1 <1.1 <1.1 <2.3 <1.1TP-2-3' 3 7/12/2010 <1.0 <1.0 <1.0 <2.0 <1.0TP-2-6' 6 7/12/2010 <1.1 <1.1 <1.1 <2.2 <1.1
TP-2-9' A 9 7/12/2010 <1.1 <1.1 <1.1 <2.3 <1.1
TP-3-0.5' 0.5 7/12/2010 <1.0 <1.0 <1.0 <2.1 <1.0TP-3-3' 3 7/12/2010 <1.1 <1.1 <1.1 <2.2 <1.1
7 of 8
Benz
ene
Ethy
lben
zene
Tolu
ene
Xyle
ne (p
/m)
Xyle
ne (o
)
TABLE A-3Historical Soil Chemical Data - BTEX
Pacific Gas and Electric Company Former Manufactured Gas Site712 S. Sacramento Street, Lodi, California
Sample IDDepth(feet)
BTEX (ug/kg)EPA Method 5030B/8260B
DateTP-3-6' 6 7/12/2010 <1.1 <1.1 <1.1 <2.1 <1.1
TP-4-0.5' 0.5 7/12/2010 <1.0 <1.0 <1.0 <2.1 <1.0TP-4-3' 3 7/12/2010 <1.0 <1.0 <1.0 <2.1 <1.0TP-4-6' 6 7/12/2010 <1.0 <1.0 <1.0 <2.0 <1.0
TP-5-0.5' 0.5 7/13/2010 <1.0 <1.0 <1.0 <2.1 <1.0TP-5-3' 3 7/13/2010 <1.6 <1.6 <1.6 <3.1 <1.6TP-5-6' 6 7/13/2010 <0.96 <0.96 <0.96 <1.9 <0.96
TP-6-0.5' 0.5 7/13/2010 1.5 <0.99 <0.99 <2.0 <0.99TP-6-3' 3 7/13/2010 <1.1 <1.1 <1.1 <2.2 <1.1TP-6-6' 6 7/13/2010 <1.1 <1.1 <1.1 <2.1 <1.1
TP-7-25S 1.17 7/12/2010 1.4 2.2 4.4 16 6.1TP-7-25D 2.67 7/12/2010 <0.80 <0.80 <0.80 <1.6 <0.80TP-7-40S 1.17 7/12/2010 <0.97 <0.97 <0.97 <1.9 <0.97TP-7-40D 2.67 7/12/2010 <0.85 <0.85 <0.85 <1.7 <0.85
TP-8-0.5' 0.5 7/13/2010 1.7 <1.1 <1.1 <2.3 <1.1TP-8-3' 3 7/13/2010 <1.0 <1.0 <1.0 <2.0 <1.0TP-8-6' 6 7/13/2010 <1.0 <1.0 <1.0 <2.0 <1.0
TP-9-0.5' 0.5 7/13/2010 130 <1.1 2.3 <2.2 <1.1TP-9-3' 3 7/13/2010 1.7 <1.0 <1.0 <2.0 <1.0TP-9-6' 6 7/13/2010 6.4 <1.0 <1.0 <2.0 <1.0
TP-9-9' A 9 7/13/2010 <0.95 <0.95 <0.95 <1.9 <0.95
TP-10-0.5' 0.5 7/13/2010 <1.0 <1.0 <1.0 <2.0 <1.0TP-10-3' 3 7/13/2010 <1.0 <1.0 <1.0 <2.0 <1.0TP-10-6' 6 7/13/2010 <1.1 <1.1 <1.1 <2.2 <1.1
TP-11-0.5' 0.5 7/13/2010 13 <1.2 <1.2 <2.3 <1.2TP-11-3' 3 7/13/2010 5.9 <1.3 <1.3 <2.5 <1.3TP-11-6' 6 7/13/2010 1.4 <1.1 <1.1 <2.2 <1.1
TP-11-9' A 9 7/13/2010 <1.2 <1.2 <1.2 <2.3 <1.2
AK-1-30" 2.5 7/15/2010 <1.4 <1.4 <1.4 <2.7 <1.4AK-1-38" 3.17 7/15/2010 1.8 <0.95 <0.95 <1.9 <0.95
AK-2-20" 1.7 7/15/2010 <1.0 <1.0 <1.0 <2.0 <1.0AK-2-34" 2.83 7/15/2010 <1.1 <1.1 <1.1 <2.2 <1.1AK-3-17" 1.42 7/15/2010 <1.3 <1.3 <1.3 <2.6 <1.3
Table Notes:Bold values represent positive detections.* - Elevated reporting limit due to matrix interferenceA - Sample extracted outside recommended hold time.
Abbreviations:DUP - Indicates duplicate sample.EPA - Environmental Protection Agencyug/kg - Micrograms per kilogram.
8 of 8
SM 4500-NH3 B/C EPA Method 9010C/9014Ammonia (as N) Total Cyanide
(mg/kg) (mg/kg)SS-3 0 2/24/2006 -- 2.0
SB-1-0' 0 10/15/2008 -- <0.50SB-1-3' 3 10/15/2008 -- <0.50SB-1-6' 6 10/15/2008 -- <0.50SB-1-9' 9 10/15/2008 -- <0.50SB-2-0' 0 10/15/2008 -- <0.50
SB-2-0' (DUP-6) 0 10/15/2008 -- <0.50SB-2-3' 3 10/15/2008 -- <0.50SB-2-6' 6 10/15/2008 -- <0.50SB-2-9' 9 10/15/2008 -- <0.50SB-3-0' 0 10/14/2008 -- <0.50SB-3-3' 3 10/14/2008 -- <0.50SB-3-6' 6 10/14/2008 -- <0.50SB-3-9' 9 10/14/2008 -- <0.50
SB-3-9' (DUP-3) 9 10/14/2008 -- <0.50SB-3-12' 12 10/14/2008 -- <0.50SB-3-15' 15 10/14/2008 -- <0.50SB-4-0' 0 10/14/2008 -- 2.5SB-4-3' 3 10/14/2008 -- 0.94SB-4-6' 6 10/14/2008 -- <0.50SB-4-7' 7 10/14/2008 -- <0.50SB-4-9' 9 10/14/2008 -- <0.50SB-5-0' 0 10/15/2008 -- 5.2SB-5-6' 6 10/15/2008 -- <0.50SB-5-9' 9 10/15/2008 -- <0.50
SB-6-7.5' 7.5 10/14/2008 -- 2.7SB-6-9.5' 9.5 10/14/2008 -- 6.2
SB-6-12.5' 12.5 10/14/2008 -- 7.5SB-7-0' 0 10/15/2008 -- 2.0SB-7-3' 3 10/15/2008 -- <0.50SB-7-6' 6 10/15/2008 -- <0.50
SB-7-6' (DUP-4) 6 10/15/2008 -- <0.50SB-7-9' 9 10/15/2008 -- <0.50SB-8-0' 0 10/15/2008 -- <0.50SB-8-3' 3 10/15/2008 -- <0.50
SB-8-5.5' 5.5 10/15/2008 -- 13SB-8-6' 6 10/15/2008 -- 1.0SB-8-9' 9 10/15/2008 -- <0.50SB-9-0' 0 10/13/2008 -- <0.50SB-9-3' 3 10/13/2008 -- <0.50
SB-9-3' (DUP-1) 3 10/13/2008 -- <0.50SB-9-6' 6 10/13/2008 -- <0.50SB-9-9' 0 10/13/2008 -- <0.50
SB-9-9' (DUP-2) 9 10/13/2008 -- <0.50SB-10-1.5' 1.5 10/15/2008 -- <0.50SB-10-3' 3 10/15/2008 -- <0.50
SB-10-3' (DUP-5) 3 10/15/2008 -- <0.50SB-10-6' 6 10/15/2008 -- <0.50SB-10-9' 9 10/15/2008 -- <0.50
TABLE A-4Historical Soil Chemical Data - Ammonia and Cyanide
Sample ID DateDepth (feet)
Pacific Gas and Electric Company Former Manufactured Gas Site712 S. Sacramento Street, Lodi, California
app a_Historical Data_Lodi MGP.xlsx/A4 1 of 4 4/19/2011
SM 4500-NH3 B/C EPA Method 9010C/9014Ammonia (as N) Total Cyanide
(mg/kg) (mg/kg)
TABLE A-4Historical Soil Chemical Data - Ammonia and Cyanide
Sample ID DateDepth (feet)
Pacific Gas and Electric Company Former Manufactured Gas Site712 S. Sacramento Street, Lodi, California
SB-11-0' 0 10/14/2008 -- 4.1SB-11-3' 3 10/14/2008 -- <0.50SB-11-6' 6 10/14/2008 -- <0.50SB-11-9' 9 10/14/2008 -- <0.50
SB-11-15' 15 10/14/2008 -- <0.50SB-12-0' 0 10/14/2008 -- 0.84
SB-12-1.5' 1.5 10/14/2008 -- <0.50SB-12-3' 3 10/14/2008 -- 0.96SB-12-6' 6 10/14/2008 -- <0.50SB-12-9' 9 10/14/2008 -- <0.50
SB-12-12' 12 10/14/2008 -- <0.50SB-12-15' 15 10/14/2008 -- <0.50SB-13-0' 0 10/13/2008 -- 3.1SB-13-3' 3 10/13/2008 -- 11SB-13-6' 6 10/13/2008 -- <0.50SB-13-9' 9 10/13/2008 -- <0.50SB-14-0' 0 10/13/2008 -- 4.2SB-14-2' 2 10/13/2008 -- 7.7SB-14-3' 3 10/13/2008 -- <0.50SB-14-6' 6 10/13/2008 -- <0.50SB-14-9' 9 10/13/2008 -- <0.50SB-15-0' 0 10/13/2008 -- <0.50SB-15-3' 3 10/13/2008 -- <0.50SB-15-6' 6 10/13/2008 -- <0.50SB-15-9' 9 10/13/2008 -- <0.50SB-16-1' 1 10/13/2008 -- 0.61SB-16-3' 3 10/13/2008 -- <0.50SB-16-6' 6 10/13/2008 -- <0.50SB-16-9' 9 10/13/2008 -- <0.50SB-17-1' 1 11/5/2009 -- 9.3
SB-17-9.5' 9.5 11/6/2009 -- on holdSB-17-18' 18 11/6/2009 -- <0.50
SB-17-20.5' 20.5 11/6/2009 -- <0.50SB-17-25.5' 25.5 11/6/2009 -- <0.50
SB-18-0' 0 11/4/2009 -- 13SB-18-8' 8 11/4/2009 -- <0.50
SB-18-16' 16 11/4/2009 -- <0.50SB-18-26' 26 11/4/2009 -- 0.59
SB-18-26' (DUP-1) 26 11/4/2009 -- <0.50SB-18-65' 65 11/4/2009 -- <0.50SB-19-5' 5 11/5/2009 -- <0.50
SB-19-15.5 15.5 11/5/2009 -- <0.50SB-19-21' 21 11/5/2009 -- <0.50SB-19-28' 28 11/5/2009 -- <0.50
SB-20-0' 0 11/4/2009 -- 0.97SB-20-14' 14 11/5/2009 -- <0.50SB-20-20' 20 11/5/2009 -- <0.50
SB-20-66.5' 66.5 11/5/2009 -- <0.50SB-20-66.5' (DUP-4) 66.5 11/5/2009 -- <0.50
app a_Historical Data_Lodi MGP.xlsx/A4 2 of 4 4/19/2011
SM 4500-NH3 B/C EPA Method 9010C/9014Ammonia (as N) Total Cyanide
(mg/kg) (mg/kg)
TABLE A-4Historical Soil Chemical Data - Ammonia and Cyanide
Sample ID DateDepth (feet)
Pacific Gas and Electric Company Former Manufactured Gas Site712 S. Sacramento Street, Lodi, California
SB-35-0' 0 11/9/2009 -- 2.0SB-35-3' 3 11/9/2009 -- <0.50SB-35-6' 6 11/9/2009 -- <0.50SB-35-9' 9 11/9/2009 -- <0.50
SB-36-0' 0 11/9/2009 -- <0.50SB-36-3' 3 11/9/2009 -- <0.50SB-36-6' 6 11/9/2009 -- <0.50SB-36-9' 9 11/9/2009 -- <0.50
SB-37-0' 0 11/9/2009 -- <0.50SB-37-3' 3 11/9/2009 -- 0.91SB-37-6' 6 11/9/2009 -- <0.50SB-37-9' 9 11/9/2009 -- <0.50
SB-38-0' 0 11/9/2009 -- <0.50SB-38-3' 3 11/9/2009 -- 0.51SB-38-6' 6 11/9/2009 -- <0.50SB-38-9' 9 11/9/2009 -- <0.50
SB-39-0' 0 11/9/2009 -- <0.50SB-39-3' 3 11/9/2009 -- <0.50SB-39-6' 6 11/9/2009 -- <0.50SB-39-9' 9 11/9/2009 -- <0.50
SB-39-9' (DUP-6) 9 11/9/2009 -- <0.50
SB-40-0' 0 11/10/2009 -- <0.50SB-40-3' 3 11/10/2009 -- <0.50SB-40-6' 6 11/10/2009 -- <0.50SB-40-9' 9 11/10/2009 -- <0.50
SB-41-0' 0 11/10/2009 -- <0.50SB-41-3' 3 11/10/2009 -- <0.50SB-41-6' 6 11/10/2009 -- <0.50SB-41-9' 9 11/10/2009 -- <0.50
SB-42-0' 0 11/10/2009 -- <0.50SB-42-3' 3 11/10/2009 -- <0.50SB-42-6' 6 11/10/2009 -- <0.50SB-42-9' 9 11/10/2009 -- <0.50
SB-43-0' 0 11/10/2009 -- 0.68SB-43-3' 3 11/10/2009 -- <0.50SB-43-6' 6 11/10/2009 -- <0.50SB-43-9' 9 11/10/2009 -- <0.50
SB-44-0' 0 11/10/2009 -- <0.50SB-44-3' 3 11/10/2009 -- <0.50SB-44-6' 6 11/10/2009 -- <0.50SB-44-9' 9 11/10/2009 -- <0.50
SB-45-0' 0 11/10/2009 -- <0.50SB-45-3' 3 11/10/2009 -- <0.50SB-45-6' 6 11/10/2009 -- <0.50SB-45-9' 9 11/10/2009 -- <0.50
SB-46-0' 0 11/10/2009 -- <0.50SB-46-3' 3 11/10/2009 -- <0.50SB-46-6' 6 11/10/2009 -- <0.50SB-46-9' 9 11/10/2009 -- <0.50
app a_Historical Data_Lodi MGP.xlsx/A4 3 of 4 4/19/2011
SM 4500-NH3 B/C EPA Method 9010C/9014Ammonia (as N) Total Cyanide
(mg/kg) (mg/kg)
TABLE A-4Historical Soil Chemical Data - Ammonia and Cyanide
Sample ID DateDepth (feet)
Pacific Gas and Electric Company Former Manufactured Gas Site712 S. Sacramento Street, Lodi, California
SB-55-1.5' 1.5 7/13/2010 45 <0.50SB-55-3' 3 7/13/2010 50 <0.50SB-55-6' 6 7/13/2010 17 <0.50SB-55-9' 9 7/13/2010 5.6 <0.50
SB-55-15' 15 7/13/2010 5.6 <0.50SB-55-20' 20 7/13/2010 11 <0.50SB-55-25' 25 7/13/2010 5.6 <0.50
SB-56-0.5' 0.5 7/14/2010 310 3.8SB-56-3' 3 7/14/2010 200 0.51SB-56-6' 6 7/14/2010 56 <0.50SB-56-9' 9 7/14/2010 11 <0.50
SB-56-15' 15 7/14/2010 5.6 <0.50SB-56-20.5' 20.5 7/14/2010 11 <0.50SB-56-25' 25 7/14/2010 5.6 <0.50
Table Notes:Bold values represent positive detections.< - Indicates constituent not detected at concentrations equal to or greater than the specified reporting limit.
Abbreviations:DUP - Indicates duplicate sample.EPA - Environmental Protection AgencyNA - Not analyzed.mg/kg - Milligrams per kilogram
app a_Historical Data_Lodi MGP.xlsx/A4 4 of 4 4/19/2011
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SS-1 0 2/24/2006 0.43946 <1.65 -- <1.65 <1.65 <1.65 <1.65 0.100 <1.65 0.170 0.230 0.064 0.056 0.140 0.170 0.110 <1.65 0.220 0.110SS-2 0 2/24/2006 7.4624 0.540 -- 0.180 0.760 0.043 0.091 5.2 0.340 9.4 12 2.4 4.1 7.4 9.1 4.7 0.710 8.6 5.9SS-3 0 2/24/2006 170.07 5.0 -- 0.240 15 0.340 1.6 140 6.8 300 340 83 95 180 220 110 13 95 64SS-4 0 2/24/2006 23.38 5.1 -- 0.590 5.8 0.270 2.1 45 3.6 43 49 11 14 23 4.5 18 1.5 11 8.8SS-5 0 2/24/2006 1.09904 <1.65 -- <1.65 0.160 <1.65 <1.65 0.810 0.088 1.5 1.9 0.370 0.550 1.0 1.3 0.750 0.081 0.750 0.490SS-6 0 2/24/2006 0.28875 U <0.330 -- <0.330 <0.330 <0.330 <0.330 <0.330 <0.330 <0.330 <0.330 <0.330 <0.330 <0.330 <0.330 <0.330 <0.330 <0.330 <0.330SS-7 0 2/24/2006 87.11 15 -- 0.800 11 0.290 1.9 88 4.7 120 150 30 43 82 100 60 7.0 48 31SS-8 0 2/24/2006 43.346 3.3 -- 0.220 3.9 0.092 0.660 23 1.7 40 51 13 19 46 57 29 3.4 28 14SS-9 0 2/24/2006 9.7702 0.960 -- 0.058 1.7 0.055 0.200 10 0.750 18 23 4.0 4.9 9.0 2.5 7.5 0.680 7.9 4.4
SB-1-0' 0 10/15/2008 0.43838 0.041 -- -- 0.130 0.019 <0.010 0.300 0.027 0.660 0.800 0.160 0.220 0.290 0.130 0.330 0.027 0.330 0.390SB-1-3' 3 10/15/2008 0.02025 <0.015 -- -- <0.030 0.088 <0.010 <0.010 0.032 0.020 0.021 <0.010 <0.010 0.014 <0.010 0.014 <0.010 0.013 0.021SB-1-6' 6 10/15/2008 0.00925 <0.015 -- -- <0.030 <0.015 <0.010 0.012 <0.010 0.017 0.019 <0.010 <0.010 <0.010 <0.010 <0.010 <0.010 0.012 0.01SB-1-9' 9 10/15/2008 0.00875 U <0.015 -- -- <0.030 <0.015 <0.010 <0.010 <0.010 <0.010 <0.010 <0.010 <0.010 <0.010 <0.010 <0.010 <0.010 <0.010 <0.010
SB-2-0' 0 10/15/2008 0.00875 U <0.015 -- -- <0.030 <0.015 <0.010 <0.010 <0.010 <0.010 0.010 <0.010 <0.010 <0.010 <0.010 <0.010 <0.010 <0.010 <0.010SB-2-0' (DUP-6) 0 10/15/2008 0.03986 <0.015 -- -- <0.030 <0.015 <0.010 0.053 <0.010 0.070 0.082 0.013 0.016 0.026 <0.010 0.030 <0.010 0.039 0.036
SB-2-3' 3 10/15/2008 0.00875 U 0.016 -- -- <0.030 0.015 <0.010 <0.010 <0.010 <0.010 <0.010 <0.010 <0.010 <0.010 <0.010 <0.010 <0.010 <0.010 <0.010SB-2-6' 6 10/15/2008 0.00875 U <0.015 -- -- <0.030 <0.015 <0.010 <0.010 <0.010 <0.010 <0.010 <0.010 <0.010 <0.010 <0.010 <0.010 <0.010 <0.010 <0.010SB-2-9' 9 10/15/2008 0.09633 <0.015 -- -- <0.030 <0.015 <0.010 <0.010 <0.010 0.058 0.068 0.019 0.023 0.055 0.022 0.076 <0.010 0.091 0.088SB-3-0' 0 10/14/2008 0.5109 0.570 -- -- <0.150 <0.075 <0.050 0.340 <0.050 0.650 0.790 0.190 0.340 0.350 0.190 0.370 <0.050 0.620 0.560SB-3-3' 3 10/14/2008 0.3121 0.230 -- -- <0.150 <0.075 <0.050 0.110 <0.050 0.410 0.440 0.100 0.200 0.220 0.066 0.230 <0.050 0.340 0.330SB-3-6' 6 10/14/2008 0.5062 0.350 -- -- <0.150 <0.075 <0.050 0.490 <0.050 0.870 1.000 0.150 0.270 0.330 0.140 0.380 <0.050 0.590 0.530SB-3-9' 9 10/14/2008 0.00875 U <0.015 -- -- <0.030 <0.015 <0.010 <0.010 <0.010 0.062 <0.010 <0.010 <0.010 <0.010 <0.010 <0.010 <0.010 <0.010 <0.010
SB-3-9' (DUP-3) 9 10/14/2008 0.00875 U <0.015 -- -- <0.030 <0.015 <0.010 <0.010 <0.010 <0.010 <0.010 <0.010 <0.010 <0.010 <0.010 <0.010 <0.010 <0.010 <0.010
SB-4-0' 0 10/14/2008 0.9624 0.140 -- -- <0.060 <0.030 <0.020 0.450 0.027 1.40 1.40 0.330 0.600 0.670 0.250 0.730 <0.020 1.10 0.980SB-4-3' 3 10/14/2008 0.6333 0.540 -- -- <0.150 <0.075 <0.050 0.400 <0.050 0.980 1.20 0.240 0.480 0.540 0.170 0.440 <0.050 0.880 0.850SB-4-6' 6 10/14/2008 0.216 <0.150 -- -- <0.300 <0.150 <0.100 0.130 <0.100 0.240 0.330 <0.100 0.300 0.140 <0.100 0.150 <0.100 0.250 0.220SB-4-7' 7 10/14/2008 3.818 0.950 -- -- <0.600 <0.300 <0.200 2.90 <0.200 6.30 6.40 1.60 2.40 3.00 1.20 2.80 <0.200 4.10 3.80SB-4-9' 9 10/14/2008 0.00875 U <0.015 -- -- <0.030 <0.015 <0.010 <0.010 <0.010 0.073 <0.010 <0.010 <0.010 <0.010 <0.010 <0.010 <0.010 <0.010 <0.010
SB-5-0' 0 10/15/2008 29.16 1.40 -- -- <3.00 <1.50 <1.00 41.0 1.70 71.0 62.0 12.0 22.0 29.0 8.70 20.0 <1.00 37.0 38.0SB-5-6' 6 10/15/2008 0.00925 0.020 -- -- <0.030 <0.015 <0.010 0.033 <0.010 0.028 0.033 <0.010 <0.010 <0.010 <0.010 <0.010 <0.010 0.011 0.010SB-5-9' 9 10/15/2008 0.00875 U 0.042 -- -- <0.030 <0.015 <0.010 0.021 <0.010 0.016 0.020 <0.010 <0.010 <0.010 <0.010 <0.010 <0.010 <0.010 <0.010
SB-6-7.5' 7.5 10/14/2008 7.217 12.0 -- -- <3.00 <1.50 <1.00 13.0 <1.00 14.0 16.0 2.10 3.70 4.40 1.60 5.60 <1.00 6.60 6.00SB-6-9.5' 9.5 10/14/2008 53.8 790 -- -- <60.0 <30.0 <20.0 170 <20.0 120 140 <20.0 30.0 27.0 <20.0 42.0 <20.0 37.0 34.0SB-6-12.5' 12.5 10/14/2008 117.57 1,500 -- -- 130 <30.0 42.0 450 44.0 310 360 46.0 67.0 66.0 28.0 92.0 <20.0 77.0 75.0
SB-7-0' 0 10/15/2008 95.72 180 -- -- 20.0 <7.50 10.0 220 13.0 280 300 39 54 68 30 69 12 80 84SB-7-3' 3 10/15/2008 0.5872 0.420 -- -- <0.150 <0.075 <0.050 0.91 <0.050 1.20 1.50 0.2 0.27 0.41 0.17 0.44 <0.050 0.68 0.58SB-7-6' 6 10/15/2008 33.238 27.0 -- -- <6.00 <3.00 2.50 70.0 3.30 81.0 97.0 12 17 24 9.4 24 4.2 38 31
SB-7-6' (DUP-4) 6 10/15/2008 1.481 1.40 -- -- <0.300 <0.150 <0.100 2.70 0.150 3.10 3.8 0.53 0.7 1.1 0.44 1.1 <0.100 1.4 1.5SB-7-9' 9 10/15/2008 0.00875 U 0.048 -- -- <0.030 0.016 <0.010 <0.010 <0.010 <0.010 0.014 <0.010 <0.010 <0.010 <0.010 <0.010 <0.010 <0.010 <0.010
SB-8-0' 0 10/15/2008 0.04375 U <0.075 -- -- 2.1 <0.075 <0.050 <0.050 <0.050 0.089 0.099 <0.050 <0.050 <0.050 <0.050 <0.050 <0.050 <0.050 <0.050SB-8-3' 3 10/15/2008 0.00875 U <0.015 -- -- 0.061 <0.015 <0.010 <0.010 <0.010 <0.010 <0.010 <0.010 <0.010 <0.010 <0.010 <0.010 <0.010 <0.010 <0.010
SB-8-5.5' 5.5 10/15/2008 53.255 67 -- -- <7.5 9.6 4.5 89 7 100 130 17 23 35 14 41 <2.5 57 50SB-8-6' 6 10/15/2008 0.03745 <0.015 -- -- <0.030 <0.015 <0.010 0.023 <0.010 0.024 0.034 <0.010 <0.010 0.012 <0.010 0.033 <0.010 0.29 <0.010SB-8-9' 9 10/15/2008 0.00875 U <0.015 -- -- <0.030 0.037 <0.010 0.012 <0.010 0.09 0.14 <0.010 <0.010 <0.010 <0.010 <0.010 <0.010 <0.010 <0.010
SB-9-0' 0 10/13/2008 4.812 0.52 -- -- <0.60 <0.30 <0.20 4.5 0.26 7.5 9.3 1.5 2 3.3 1.4 3.6 0.3 5 4.7SB-9-3' 3 10/13/2008 0.13855 0.027 -- -- <0.030 <0.015 0.01 0.022 <0.010 0.11 0.14 0.03 0.037 0.093 0.034 0.1 0.022 0.16 0.15
SB-9-3' (DUP-1) 3 10/13/2008 0.04043 <0.015 -- -- <0.030 <0.015 <0.010 <0.010 <0.010 0.028 0.048 <0.010 0.013 0.03 <0.010 0.03 <0.010 0.06 0.046SB-9-6' 6 10/13/2008 1.1576 0.2 -- -- <0.150 <0.075 <0.050 0.55 <0.050 1.1 1.5 0.28 0.31 0.8 0.28 0.89 <0.050 1.5 1.2
Pacific Gas and Electric Company Former Manufactured Gas SiteHistorical Soil Chemical Data - PAHs
TABLE A-5
PAHs (mg/kg)EPA METHOD 3545/8310
Depth(feet) DateSample ID
712 S. Sacramento Street, Lodi, California
1 of 8
BaP
Equ
ival
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Nap
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lnap
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2-M
ethy
lnap
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Ace
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Ace
naph
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Fluo
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Phe
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Ant
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Pacific Gas and Electric Company Former Manufactured Gas SiteHistorical Soil Chemical Data - PAHs
TABLE A-5
PAHs (mg/kg)EPA METHOD 3545/8310
Depth(feet) DateSample ID
712 S. Sacramento Street, Lodi, California
SB-9-9' 9 10/13/2008 0.01635 0.041 -- -- <0.030 <0.015 <0.010 0.015 <0.010 0.023 0.023 <0.010 <0.010 0.01 <0.010 0.011 <0.010 0.017 0.016SB-9-9' (DUP-2) 9 10/13/2008 0.2145 0.21 -- -- 0.033 <0.015 0.011 0.26 0.011 0.47 0.53 0.065 0.12 0.15 0.061 0.16 <0.010 0.29 0.24
SB-10-1.5' 0 10/15/2008 3.264 2.7 -- -- <1.50 <0.750 <0.500 7.1 <0.500 8.1 10 1.3 1.6 2.4 0.83 2.4 <0.500 3.5 3.1SB-10-3' 3 10/15/2008 0.46385 <0.015 -- -- 0.052 <0.015 <0.010 0.031 <0.010 0.25 0.4 0.072 0.095 0.3 0.1 0.37 <0.010 0.47 0.44
SB-10-3' (DUP-5) 3 10/15/2008 0.53266 0.031 -- -- 0.039 0.036 <0.010 0.05 <0.010 0.31 0.46 0.098 0.014 0.32 0.12 0.41 0.058 0.56 0.49SB-10-6' 6 10/15/2008 0.4164 0.018 -- -- <0.030 0.029 <0.010 0.061 <0.010 0.32 0.47 0.097 0.11 0.25 0.09 0.32 0.04 0.42 0.38SB-10-9' 9 10/15/2008 0.00875 U 0.22 -- -- <0.030 <0.015 <0.010 <0.010 <0.010 <0.010 <0.010 <0.010 <0.010 <0.010 <0.010 <0.010 <0.010 0.043 <0.010
SB-11-0' 0 10/14/2008 1.4728 0.24 -- -- <0.300 <0.150 <0.100 1.1 <0.100 2.1 2.2 0.47 0.88 1 0.4 1.1 <0.100 1.8 1.6SB-11-3' 3 10/14/2008 0.02864 0.028 -- -- <0.030 <0.015 <0.010 <0.010 <0.010 0.029 0.036 <0.010 0.014 0.019 <0.010 0.021 <0.010 0.034 0.029SB-11-6' 6 10/14/2008 0.01212 0.034 -- -- <0.030 <0.015 <0.010 0.025 <0.010 0.037 0.038 <0.010 0.022 0.022 <0.010 <0.010 <0.010 0.038 0.02SB-11-9' 9 10/14/2008 0.00875 U <0.015 -- -- <0.030 <0.015 <0.010 <0.010 <0.010 <0.010 <0.010 <0.010 <0.010 <0.010 <0.010 <0.010 <0.010 <0.010 <0.010SB-11-15' 15 10/14/2008 0.00875 U <0.015 -- -- <0.030 <0.015 <0.010 <0.010 <0.010 <0.010 <0.010 <0.010 <0.010 <0.010 <0.010 <0.010 <0.010 <0.010 <0.010
SB-12-0' 0 10/14/2008 1.3253 0.4 -- -- <0.300 <0.150 <0.100 1 <0.100 2 2 0.41 0.73 0.86 0.34 1 <0.100 1.8 1.4SB-12-1.5' 1.5 10/14/2008 0.00875 U <0.015 -- -- <0.030 <0.015 <0.010 <0.010 <0.010 <0.010 <0.010 <0.010 <0.010 <0.010 <0.010 <0.010 <0.010 <0.010 <0.010SB-12-3' 3 10/14/2008 35.86 6.8 -- -- <3.00 <1.50 1.3 32 2.1 31 47 12 19 24 12 27 <1.00 39 37SB-12-6' 6 10/14/2008 8.4462 2.6 -- -- 0.83 <0.300 0.25 7.3 0.5 7.9 13 2.9 5.1 5.6 1.9 6.5 0.28 8.2 7.6SB-12-9' 9 10/14/2008 0.7633 0.71 -- -- <0.300 <0.150 <0.100 1.1 <0.100 1.2 1.3 0.25 0.43 0.46 0.13 0.58 <0.100 0.77 0.78SB-12-12' 12 10/14/2008 0.00875 U <0.015 -- -- <0.030 <0.015 <0.010 <0.010 <0.010 <0.010 <0.010 <0.010 <0.010 <0.010 <0.010 <0.010 <0.010 <0.010 <0.010SB-12-15' 15 10/14/2008 0.01215 <0.015 -- -- <0.030 <0.015 <0.010 <0.010 <0.010 <0.010 <0.010 <0.010 <0.010 <0.010 <0.010 <0.010 0.015 <0.010 <0.010
SB-13-0' 0 10/13/2008 93.766 19 -- -- <15 <7.5 6.4 120 11 190 220 44 53 70 33 68 5.4 78 87SB-13-3' 3 10/13/2008 28.406 3.4 -- -- <6.0 <3.0 <2.0 44 3.3 66 72 13 16 21 9.5 20 4.4 21 24SB-13-6' 6 10/13/2008 0.00875 U <0.015 -- -- <0.030 <0.015 <0.010 <0.010 <0.010 <0.010 <0.010 <0.010 <0.010 <0.010 <0.010 <0.010 <0.010 <0.010 <0.010SB-13-9' 9 10/13/2008 0.00875 U <0.015 -- -- <0.030 <0.015 <0.010 <0.010 <0.010 <0.010 <0.010 <0.010 <0.010 <0.010 <0.010 <0.010 <0.010 <0.010 <0.010
SB-14-0' 0 10/13/2008 2.1936 0.68 -- -- 0.2 0.084 0.096 2.5 0.13 3.9 4.6 0.69 1 1.6 0.57 1.6 0.14 2.7 2.5SB-14-2' 2 10/13/2008 84.71 510 -- -- 60 12 20 250 22 200 240 38 46 54 23 66 <5.0 63 59SB-14-3' 3 10/13/2008 71.06 460 -- -- 50 <7.5 16 210 19 180 200 32 41 45 20 55 <5.0 49 51SB-14-6' 6 10/13/2008 19.628 170 -- -- <15 <7.5 <5.0 57 5.4 45 51 8.3 9.8 12 <5.0 15 <5.0 15 14SB-14-9' 9 10/13/2008 0.00875 U <0.015 -- -- <0.030 <0.015 <0.010 <0.010 <0.010 <0.010 <0.010 <0.010 <0.010 <0.010 <0.010 <0.010 <0.010 <0.010 <0.010
SB-15-0' 0 10/13/2008 14.619 4.1 -- -- <3.0 1.6 1.1 28 2.4 39 39 6.1 7.9 10 4.6 11 <1.0 13 13SB-15-3' 3 10/13/2008 10.078 3 -- -- <1.5 <0.750 <0.500 12 0.52 18 21 3.8 5.3 7.6 3.3 7.2 0.75 11 11SB-15-6' 6 10/13/2008 2.498 <0.750 -- -- <1.5 <0.750 <0.500 3.6 <0.500 4.9 5.9 0.93 1.3 1.9 0.67 1.8 <0.500 3.1 2.5SB-15-9' 9 10/13/2008 0.0175 U <0.030 -- -- 0.079 <0.030 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020
SB-16-1' 1 10/13/2008 16.2166 1.6 -- -- <1.5 <0.750 <0.500 22 1.2 36 40 5.7 8.1 12 4.8 12 0.84 17 16SB-16-3' 3 10/13/2008 0.09889 0.15 -- -- <0.060 0.34 <0.20 0.11 <0.20 0.18 0.2 0.034 0.049 0.074 0.026 0.068 0.035 0.12 0.051SB-16-6' 6 10/13/2008 0.21505 <0.30 -- -- <0.060 <0.030 0.027 0.082 <0.20 0.23 0.23 0.047 0.085 0.1 0.031 0.078 0.34 0.21 0.028SB-16-9' 9 10/13/2008 0.0175 U <0.015 -- -- <0.030 <0.015 <0.010 <0.010 <0.010 <0.010 <0.010 <0.010 <0.010 <0.010 <0.010 <0.010 <0.010 <0.010 <0.010
SB-17-1' 1 11/5/2009 4.1594 0.79 0.35 0.47 0.78 <0.20 <0.20 3.3 0.38 5.2 5.8 1.3 2.0 2.9 1.8 3.0 0.41 5.5 4.0SB-17-18' 18 11/6/2009 0.1762 <0.20 <0.20 <0.20 <0.20 0.22 0.62 <0.20 <0.20 <0.20 <0.20 <0.20 0.22 <0.20 <0.20 <0.20 <0.20 <0.20 <0.20
SB-17-20.5' 20.5 11/6/2009 0.3587 4.8 7.9 8.5 <0.20 0.25 2.5 1.2 4.9 0.27 0.77 0.35 0.97 <0.20 <0.20 0.25 <0.20 <0.20 <0.20SB-17-25.5' 25.5 11/6/2009 0.0175 U 0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020
SB-18-0' 0 11/4/2009 56.814 11 <5.0 <5.0 7.7 <5.0 <5.0 66 <5.0 100 130 23 38 57 37 33 5.1 140 100SB-18-8' 8 11/4/2009 0.2101 <0.10 <0.10 <0.10 <0.10 <0.10 <0.10 <0.10 <0.10 <0.10 0.210 <0.10 0.310 <0.10 <0.10 0.170 <0.10 <0.10 <0.10SB-18-16' 16 11/4/2009 0.993 0.47 <0.10 <0.10 0.44 0.33 0.17 0.34 1.6 2.0 2.2 0.43 0.72 <0.10 1.1 0.77 0.12 1.5 0.17SB-18-26' 26 11/4/2009 0.0175 U <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020
SB-18-26' (DUP-1) 26 11/4/2009 0.0175 U <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020SB-18-65' 65 11/4/2009 0.0175 U <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020
SB-19-5' 5 11/5/2009 0.0175 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020SB-19-15.5 15.5 11/5/2009 0.3555 1.8 5.3 7.6 <0.40 0.90 3.2 0.59 <0.40 <0.40 0.6 <0.40 0.75 <0.40 <0.40 <0.40 <0.40 <0.40 <0.40
2 of 8
BaP
Equ
ival
ent
Nap
htha
lene
1-M
ethy
lnap
htha
lene
2-M
ethy
lnap
htha
lene
Ace
naph
thyl
ene
Ace
naph
then
e
Fluo
rene
Phe
nant
hren
e
Ant
hrac
ene
Fluo
rant
hene
Pyr
ene
Ben
zo(a
)ant
hrac
ene
*
Chr
ysen
e *
Ben
zo(b
)fluo
rant
hene
*
Ben
zo(k
)fluo
rant
hene
*
Ben
zo(a
)pyr
ene*
Dib
enz(
a,h)
Ant
hrac
ene
*
Ben
zo(g
,h,i)
Per
ylen
e
Inde
no(1
,2,3
-cd)
pyre
ne*
Pacific Gas and Electric Company Former Manufactured Gas SiteHistorical Soil Chemical Data - PAHs
TABLE A-5
PAHs (mg/kg)EPA METHOD 3545/8310
Depth(feet) DateSample ID
712 S. Sacramento Street, Lodi, California
SB-19-21' 21 11/5/2009 0.3547 4.8 7.2 8.3 <0.40 0.90 2.4 4.1 <0.40 <0.40 0.44 <0.40 0.67 <0.40 <0.40 <0.40 <0.40 <0.40 <0.40SB-19-28' 28 11/5/2009 0.0175 U <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020
SB-20-0' 0 11/4/2009 5.2528 0.62 <0.40 <0.40 0.67 <0.40 <0.40 2.1 <0.40 4.5 6.5 1.6 2.2 3.3 2.3 3.7 0.62 9.2 6.0SB-20-14' 14 11/5/2009 0.0175 U <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020SB-20-20' 20 11/5/2009 0.0394 0.087 0.33 <0.040 <0.040 0.15 0.35 <0.040 <0.040 <0.040 0.088 0.053 0.13 <0.040 <0.040 <0.040 <0.040 <0.040 <0.040
SB-20-66.5' 66.5 11/5/2009 0.0175 U <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020SB-20-66.5' (DUP-4) 66.5 11/5/2009 0.0175 U <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020
SB-21-0' 0 11/3/2009 0.4091 0.054 <0.040 <0.040 <0.040 <0.040 <0.040 0.39 <0.040 0.58 0.57 0.16 0.23 0.30 0.19 0.30 <0.040 0.52 0.35SB-21-5' 5 11/2/2009 1.4182 0.290 <0.10 <0.10 0.200 <0.10 <0.10 1.7 0.11 2.3 2.4 0.70 0.78 0.87 0.79 1.0 0.16 1.6 1.2SB-21-10' 10 11/2/2009 0.0175 U <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020
SB-22-0' 0 11/2/2009 18.79 16 <2.0 <2.0 9.4 <2.0 3.7 47 3.2 44 52 9.5 11 11 8.9 14 <2.0 19 14SB-22-5' 5 11/2/2009 2.607 0.46 <0.20 <0.20 0.47 <0.20 <0.20 3.1 0.22 3.7 4.9 1.2 1.3 1.6 1.2 1.9 <0.20 3.6 2.6SB-22-10' 10 11/2/2009 0.0175 U <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020
SB-23-0' 0 11/2/2009 25.846 3.4 <2.0 <2.0 2.7 <2.0 <2.0 14 <2.0 34 40 9.0 13 22 13 17 2.4 46 35SB-23-10' 10 11/2/2009 0.0175 U <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020SB-23-12' 12 11/2/2009 23.88 3.3 <2.0 <2.0 2.5 <2.0 <2.0 20 <2.0 39 50 8.3 12 19 9.9 17 <2.0 37 27SB-23-15' 15 11/2/2009 0.0175 U <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020
SB-24-0' 0 11/2/2009 0.5336 0.10 <0.10 <0.10 0.11 <0.10 <0.10 0.55 <0.10 0.75 0.88 0.21 0.26 0.32 0.27 0.38 <0.10 0.74 0.54SB-24-5' 5 11/2/2009 0.6613 <0.10 <0.10 <0.10 <0.10 <0.10 <0.10 0.39 <0.10 0.63 0.83 0.19 0.23 0.41 0.29 0.46 <0.10 1.3 0.93SB-24-10' 10 11/2/2009 0.0175 U <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020
SB-25-0' 0 11/2/2009 62.4 24 <5.0 <5.0 9.8 <5.0 <5.0 99 7.3 120 150 27 35 39 30 46 <5.0 74 56SB-25-5' 5 11/2/2009 0.0175 U <0.020 <0.020 <0.020 0.024 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020SB-25-10' 10 11/2/2009 0.0175 U <0.020 <0.020 <0.020 0.051 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020
SB-26-0.5' 0.5 11/5/2009 0.0175 U <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 0.020 <0.020SB-26-5' 5 11/5/2009 0.0175 U <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020SB-26-15' 15 11/5/2009 0.0175 U <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020
SB-27-0.5' 0.5 11/5/2009 1.8614 <0.020 <0.020 <0.020 0.24 <0.020 <0.020 3.8 <0.020 3.7 4.6 0.95 1.3 1.0 1.1 1.4 <0.020 1.6 1.4SB-27-5' 5 11/5/2009 0.0175 U <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020
SB-27-10' (DUP-5) 10 11/5/2009 0.0175 U <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020SB-27-15' 15 11/5/2009 0.0175 U <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020
SB-28-0.5' 8 11/5/2009 0.61776 0.051 <0.020 <0.020 0.066 <0.020 <0.020 0.30 0.040 0.60 0.84 0.25 0.33 0.36 0.34 0.44 0.069 0.67 0.56SB-28-8' 8 11/5/2009 0.0175 U <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020SB-28-15' 15 11/5/2009 0.0175 U <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020
SB-29-0.5' 0.5 11/4/2009 0.2243 <0.020 <0.020 <0.020 0.10 <0.020 <0.020 0.065 <0.020 0.19 0.27 0.078 0.11 0.14 0.14 0.16 <0.020 0.31 0.24SB-29-5' 5 11/4/2009 0.0175 U <0.020 <0.020 <0.020 <0.020 0.032 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020SB-29-10' 10 11/4/2009 0.0175 U <0.020 <0.020 <0.020 <0.020 0.035 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020SB-29-13' 13 11/4/2009 0.0175 U <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020
SB-30-0.5' 0.5 11/4/2009 0.63068 0.086 <0.020 <0.020 0.061 <0.020 <0.020 0.19 0.029 0.45 0.63 0.20 0.29 0.36 0.32 0.46 0.067 0.74 0.57SB-30-5' 5 11/4/2009 0.0175 U <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020
SB-30-5' (DUP-3) 5 11/4/2009 0.0187 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 0.027 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 0.028 0.022SB-30-10' 10 11/4/2009 0.0175 U <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020SB-30-13' 13 11/4/2009 0.0175 U <0.020 <0.020 <0.020 <0.020 0.083 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020
SB-31-0.5' 0.5 11/4/2009 0.08693 0.026 <0.020 <0.020 <0.020 <0.020 <0.020 0.047 <0.020 0.10 0.15 0.037 0.043 0.062 0.049 0.060 <0.020 0.12 0.083SB-31-5' 5 11/4/2009 0.0175 U <0.020 <0.020 <0.020 <0.020 0.030 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020SB-31-10' 10 11/4/2009 0.0175 U <0.020 <0.020 <0.020 <0.020 0.021 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020SB-31-15' 15 11/4/2009 0.0175 U <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020
SB-32-0.5' 0.5 11/4/2009 0.3656 <0.020 <0.020 <0.020 0.039 <0.020 <0.020 0.40 0.040 0.57 0.76 0.14 0.22 0.26 0.22 0.26 <0.020 0.55 0.38
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Pacific Gas and Electric Company Former Manufactured Gas SiteHistorical Soil Chemical Data - PAHs
TABLE A-5
PAHs (mg/kg)EPA METHOD 3545/8310
Depth(feet) DateSample ID
712 S. Sacramento Street, Lodi, California
SB-32-5' 5 11/4/2009 0.0779 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 0.076 <0.020 0.13 0.14 0.032 0.040 0.057 0.038 0.055 <0.020 0.10 0.064SB-32-10' 10 11/4/2009 0.0175 U <0.020 <0.020 <0.020 <0.020 0.045 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020SB-32-15' 15 11/4/2009 0.0175 U <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020
SB-33-0.5' 0.5 11/4/2009 153.14 49 <10 <10 41 <10 <10 340 <10 290 350 78 110 83 85 110 16 150 120SB-33-5' 5 11/4/2009 0.0175 U <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020SB-33-10' 10 11/4/2009 0.0175 U <0.020 <0.020 <0.020 <0.020 0.029 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020SB-33-15' 15 11/4/2009 0.0175 U <0.020 <0.020 <0.020 <0.020 0.13 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020
SB-34-0' 0 11/3/2009 18.978 3.6 <2.0 <2.0 <2.0 <2.0 <2.0 16 <2.0 25 34 8.4 9.8 11 9.0 14 <2.0 21 17SB-34-8' 8 11/3/2009 0.0875 U <0.10 <0.10 <0.10 0.12 <0.10 <0.10 <0.10 <0.10 <0.10 <0.10 <0.10 <0.10 <0.10 <0.10 <0.10 <0.10 0.31 <0.10SB-34-12' 12 11/3/2009 0.0175 U <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020
SB-34-12' (DUP-2) 12 11/3/2009 0.0175 U <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020
SB-35-0' 0 11/9/2009 10.487 2.1 <0.50 <0.50 0.86 <0.50 <0.50 7.3 <0.50 11 15 4.1 5.3 6.0 5.0 7.6 1.1 12 9.5SB-35-3' 3 11/9/2009 0.09929 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 0.053 <0.020 0.085 0.15 0.040 0.049 0.058 0.056 0.070 <0.020 0.13 0.10SB-35-6' 6 11/9/2009 0.0175 U <0.020 <0.020 <0.020 <0.020 0.044 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020SB-35-9' 9 11/9/2009 0.0175 U <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020
SB-36-0' 0 11/9/2009 0.4333 1.3 0.13 0.18 <0.10 <0.10 <0.10 0.24 <0.10 0.33 0.49 0.17 0.23 0.32 0.26 0.29 <0.10 0.66 0.49SB-36-3' 3 11/9/2009 0.7414 0.10 <0.10 <0.10 <0.10 <0.10 <0.10 0.22 <0.10 0.54 0.78 0.24 0.34 0.54 0.39 0.51 <0.10 1.2 0.94SB-36-6' 6 11/9/2009 0.0175 U <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020SB-36-9' 9 11/9/2009 0.0175 U <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020
SB-37-0' 0 11/9/2009 0.175 U 5.8 0.36 0.57 <0.20 <0.20 <0.20 0.21 <0.20 <0.20 <0.20 <0.20 <0.20 <0.20 <0.20 <0.20 <0.20 <0.20 <0.20SB-37-3' 3 11/9/2009 3.276 0.66 <0.40 <0.40 <0.40 <0.40 <0.40 0.71 <0.40 2.8 4.1 1.1 1.8 2.7 1.5 2.3 <0.40 4.5 3.6SB-37-6' 6 11/9/2009 0.0193 0.040 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 0.028 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 0.028 0.028SB-37-9' 9 11/9/2009 0.0175 U <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020
SB-38-0' 0 11/9/2009 1.83 5.0 <0.40 0.49 <0.40 <0.40 <0.40 1.2 <0.40 1.4 1.7 0.98 1.4 1.0 1.3 1.3 <0.40 1.1 1.2SB-38-3' 3 11/9/2009 0.2738 0.16 <0.020 0.022 0.023 <0.020 <0.020 0.067 <0.020 0.17 0.26 0.10 0.14 0.19 0.16 0.20 <0.020 0.30 0.24SB-38-6' 6 11/9/2009 0.0175 U <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020SB-38-9' 9 11/9/2009 0.0175 U <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020
SB-39-0' 0 11/9/2009 0.175 U 2.2 <0.20 0.24 <0.20 <0.20 <0.20 0.20 <0.20 <0.20 0.22 <0.20 <0.20 <0.20 <0.20 <0.20 <0.20 <0.20 <0.20SB-39-3' 3 11/9/2009 0.0175 U 0.36 0.024 0.035 <0.020 <0.020 <0.020 0.027 <0.020 0.025 0.032 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020SB-39-6' 6 11/9/2009 0.0175 U <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020SB-39-9' 9 11/9/2009 0.0175 U <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020
SB-39-9' (DUP-6) 9 11/9/2009 0.0175 U <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020
SB-40-0' 0 11/10/2009 0.07357 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 0.024 <0.020 0.035 0.044 0.032 0.047 0.051 0.041 0.052 <0.020 0.063 0.053SB-40-3' 3 11/10/2009 0.12601 0.039 <0.020 <0.020 0.023 <0.020 <0.020 0.041 <0.020 0.12 0.11 0.040 0.051 0.060 0.061 0.092 <0.020 0.31 0.14SB-40-6' 6 11/10/2009 0.0175 U <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020SB-40-9' 9 11/10/2009 0.0175 U <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020
SB-41-0' 0 11/10/2009 0.1271 1.4 0.11 0.16 <0.020 <0.020 <0.020 0.10 <0.020 0.076 0.083 0.056 0.080 0.084 0.076 0.093 <0.020 0.093 0.083SB-41-3' 3 11/10/2009 0.0175 U 0.037 <0.020 <0.020 <0.020 <0.020 <0.020 0.029 <0.020 0.030 0.043 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 0.026 <0.020SB-41-6' 6 11/10/2009 0.0175 U <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020SB-41-9' 9 11/10/2009 0.0175 U <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020
SB-42-0' 0 11/10/2009 0.10358 0.12 0.065 0.090 <0.020 <0.020 <0.020 0.046 <0.020 0.037 0.047 0.042 0.058 0.072 0.065 0.074 <0.020 0.082 0.077SB-42-3' 3 11/10/2009 0.0175 U <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020SB-42-6' 6 11/10/2009 0.0175 U <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020SB-42-9' 9 11/10/2009 0.0175 U <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020
SB-43-0' 0 11/10/2009 5.348 0.86 <0.20 <0.20 0.50 <0.20 <0.20 5.0 0.46 6.6 8.1 2.1 2.8 3.3 2.8 3.9 0.50 5.3 4.3SB-43-3' 3 11/10/2009 0.04853 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 0.044 0.061 <0.020 0.023 0.031 0.024 0.034 <0.020 0.058 0.044SB-43-6' 6 11/10/2009 0.0175 U <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020SB-43-9' 9 11/10/2009 0.0175 U <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020
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Pacific Gas and Electric Company Former Manufactured Gas SiteHistorical Soil Chemical Data - PAHs
TABLE A-5
PAHs (mg/kg)EPA METHOD 3545/8310
Depth(feet) DateSample ID
712 S. Sacramento Street, Lodi, California
SB-44-0' 0 11/10/2009 0.04512 1.3 0.15 0.24 <0.020 <0.020 <0.020 0.10 <0.020 0.043 0.045 0.026 0.042 0.036 0.032 0.029 <0.020 0.030 0.029SB-44-3' 3 11/10/2009 0.22423 0.078 <0.020 <0.020 0.045 <0.020 <0.020 0.049 <0.020 0.13 0.16 0.059 0.093 0.17 0.11 0.16 <0.020 0.34 0.26SB-44-6' 6 11/10/2009 0.0175 U <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020SB-44-9' 9 11/10/2009 0.0175 U <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020
SB-45-0' 0 11/10/2009 0.11995 6.9 0.55 0.81 <0.020 <0.020 0.040 0.28 0.040 0.10 0.087 0.055 0.085 0.088 0.081 0.086 <0.020 0.069 0.073SB-45-3' 3 11/10/2009 0.08986 0.24 <0.020 0.021 <0.020 <0.020 <0.020 0.025 <0.020 0.064 0.087 0.030 0.046 0.073 0.049 0.063 <0.020 0.093 0.078SB-45-6' 6 11/10/2009 0.0175 U <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020SB-45-9' 9 11/10/2009 0.0175 U <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020
SB-46-0' 0 11/10/2009 0.4257 1.1 <0.10 0.14 <0.10 <0.10 <0.10 0.16 <0.10 0.19 0.23 0.17 0.27 0.29 0.28 0.30 <0.10 0.31 0.32SB-46-3' 3 11/10/2009 0.0175 U 0.055 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020SB-46-6' 6 11/10/2009 0.0175 U <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020SB-46-9' 9 11/10/2009 0.0175 U <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020
SB-47-0.5' 0.5 7/15/2010 25.486 1.2 <1.0 <1.0 2.3 <1.0 <1.0 22 1.3 39 47 9.1 16 19 14 18 2.4 35 23SB-47-3' 3 7/15/2010 0.18134 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 0.076 <0.020 0.21 0.24 0.051 0.11 0.14 0.11 0.12 0.021 0.35 0.23SB-47-6' 6 7/15/2010 0.0175 U <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020
SB-48-1.5' 1.5 7/13/2010 91.048 9.6 <4.0 <4.0 11 <4.0 <4.0 71 12 96 120 25 36 42 35 72 8.2 83 57SB-48-3' 3 7/13/2010 7.6314 1.2 <0.50 <0.50 0.95 <0.50 <0.50 7.2 1.2 9.9 12 2.2 3.0 3.4 3.1 6.0 0.71 7.2 4.9SB-48-6' 6 7/13/2010 0.0175 U <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020
SB-49-3' 3 7/13/2010 17.712 4.9 <1.0 <1.0 2.7 <1.0 <1.0 6.5 1.3 10 13 3.5 5.4 7.8 6.5 14 1.7 22 13SB-49-4' 4 7/13/2010 4,998 23,000 <1,000 1,000 4,100 <1,000 1,400 13,000 2,400 9,800 10,000 2,000 2,800 2,200 2,200 3,900 <1,000 3,400 2,600SB-49-6' 6 7/13/2010 0.26264 0.17 <0.020 <0.020 0.13 <0.020 0.042 0.65 0.079 0.49 0.54 0.10 0.15 0.12 0.10 0.21 0.021 0.16 0.12
SB-50-1.5' 1.5 7/13/2010 43.67 <4.0 <4.0 <4.0 <4.0 <4.0 <4.0 25 <4.0 56 61 13 19 20 20 34 <4.0 54 35SB-50-3' 3 7/13/2010 0.10026 <0.020 <0.020 <0.020 0.033 <0.020 <0.020 0.049 <0.020 0.13 0.17 0.034 0.046 0.047 0.046 0.076 <0.020 0.12 0.077SB-50-6' 6 7/13/2010 0.0175 U <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020
SB-51-1.5' 1.5 7/13/2010 2.3704 0.34 <0.20 <0.20 0.36 <0.20 <0.20 2.1 <0.20 2.7 2.7 0.78 1.1 1.2 1.1 1.8 0.21 2.6 1.8SB-51-3' 3 7/13/2010 0.58588 0.27 <0.020 <0.020 0.086 <0.020 <0.020 0.53 0.046 0.60 0.82 0.18 0.28 0.28 0.25 0.45 0.062 0.59 0.41
SB-51-6.5' 6.5 7/13/2010 9,824 <1,000 <1,000 <1,000 1,400 <1,000 <1,000 9,600 <1,000 20,000 21,000 3,300 4,400 4,600 4,700 7,600 <1,000 11,000 7,500SB-51-9' A 9 7/13/2010 0.0175 U <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020
SB-52-1' 1 7/12/2010 0.18227 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 0.041 <0.020 0.13 0.19 0.043 0.057 0.086 0.070 0.14 0.020 0.24 0.15SB-52-3' 3 7/12/2010 0.0711 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 0.055 0.082 0.023 0.030 0.037 0.031 0.052 <0.020 0.10 0.063SB-52-6' 6 7/12/2010 0.0175 U <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020SB-52-9' 9 7/12/2010 0.0175 U 0.040 0.030 0.062 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020SB-52-15' 15 7/12/2010 0.0175 U <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020SB-52-20' 20 7/12/2010 0.3529 <0.40 <0.40 <0.40 <0.40 0.65 1.3 <0.40 <0.40 <0.40 <0.40 <0.40 0.49 <0.40 <0.40 <0.40 <0.40 <0.40 <0.40
SB-52-24.5' 24.5 7/12/2010 0.0175 U 0.062 <0.020 0.025 <0.020 <0.020 <0.020 0.087 <0.020 0.059 0.065 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 0.024 <0.020
SB-53-0.5' 0.5 7/12/2010 0.10622 <0.040 <0.040 <0.040 <0.040 <0.040 <0.040 0.087 <0.040 0.14 0.16 <0.040 0.052 0.059 0.050 0.073 <0.040 0.28 0.13SB-53-3' 3 7/13/2010 0.0175 U <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020SB-53-6' 6 7/13/2010 0.3375 <0.040 <0.040 <0.040 0.054 <0.040 <0.040 0.25 <0.040 0.50 0.45 0.10 0.17 0.21 0.15 0.25 <0.040 0.53 0.33SB-53-9' 9 7/13/2010 0.0175 U <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020SB-53-15' 15 7/13/2010 0.0175 U <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020
SB-53-20.5' 20.5 7/13/2010 0.0358 <0.040 0.058 <0.040 0.11 0.15 0.13 0.049 0.045 <0.040 0.059 <0.040 0.10 <0.040 <0.040 <0.040 <0.040 <0.040 <0.040SB-53-25' 25 7/13/2010 0.0175 U 0.12 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020
SB-54-1' 1 7/12/2010 0.0188 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 0.038 0.023SB-54-3' 3 7/12/2010 0.07899 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 0.058 <0.020 0.10 0.10 0.024 0.049 0.050 0.037 0.053 <0.020 0.17 0.11SB-54-6' 6 7/12/2010 0.0175 U <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020SB-54-9' 9 7/12/2010 0.0175 U <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020SB-54-15' 15 7/12/2010 0.0758 <0.040 0.061 <0.040 <0.040 0.26 0.23 0.31 0.077 0.12 0.14 <0.040 0.19 0.066 <0.040 0.051 <0.040 0.087 0.055SB-54-20' 20 7/12/2010 0.037 <0.040 0.10 <0.040 <0.040 0.35 0.88 <0.040 0.10 0.061 0.084 <0.040 0.22 <0.040 <0.040 <0.040 <0.040 <0.040 <0.040
5 of 8
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Pacific Gas and Electric Company Former Manufactured Gas SiteHistorical Soil Chemical Data - PAHs
TABLE A-5
PAHs (mg/kg)EPA METHOD 3545/8310
Depth(feet) DateSample ID
712 S. Sacramento Street, Lodi, California
SB-54-22' 22 7/12/2010 0.0845 0.21 0.56 0.60 <0.040 0.23 0.072 0.74 0.095 0.087 0.096 <0.040 0.17 <0.040 <0.040 0.068 <0.040 <0.040 <0.040
SB-55-1.5' 1.5 7/13/2010 0.0175 U <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 0.021 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 0.024 <0.020SB-55-3' 3 7/13/2010 0.0175 U <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020SB-55-6' 6 7/13/2010 0.0175 U <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020SB-55-9' 9 7/13/2010 0.0175 U <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020SB-55-15' 15 7/13/2010 0.0175 U <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020SB-55-20' 20 7/13/2010 0.0373 <0.040 0.28 <0.040 <0.040 0.45 0.85 0.20 0.16 0.10 0.10 <0.040 0.25 <0.040 <0.040 <0.040 <0.040 <0.040 <0.040SB-55-25' 25 7/13/2010 0.0175 U <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020
SB-56-0.5' 0.5 7/14/2010 36.34 <4.0 <4.0 <4.0 6.2 <4.0 <4.0 39 <4.0 69 63 15 26 25 22 26 <4.0 43 32SB-56-3' 3 7/14/2010 0.27258 0.058 <0.020 <0.020 0.043 <0.020 <0.020 0.22 <0.020 0.58 0.71 0.12 0.23 0.23 0.17 0.17 0.042 0.47 0.34SB-56-6' 6 7/14/2010 0.05551 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 0.038 <0.020 0.11 0.14 0.023 0.041 0.045 0.030 0.035 <0.020 0.099 0.069SB-56-9' 9 7/14/2010 0.0198 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 0.021 <0.020 0.048 0.061 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 0.052 0.033SB-56-15' 15 7/14/2010 0.03653 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 0.025 <0.020 0.058 0.076 <0.020 0.023 0.026 0.021 0.023 <0.020 0.067 0.042
SB-56-20.5' 20.5 7/14/2010 0.882 <1.0 <1.0 <1.0 <1.0 1.4 1.5 1.8 <1.0 <1.0 <1.0 <1.0 1.2 <1.0 <1.0 <1.0 <1.0 <1.0 <1.0SB-56-25' 25 7/14/2010 0.0175 U <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020
SB-57-20.5' 20.5 7/15/2010 0.0175 U <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020
SB-58-0 0 9/22/2010 0.07252 <0.020 <0.020 0.021 <0.020 <0.020 <0.020 0.020 <0.020 <0.020 0.025 0.046 0.052 0.046 0.052 0.052 <0.020 0.024 0.022SB-58-5 5 9/22/2010 0.0175 U <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020
SB-58-10 10 9/22/2010 0.0175 U <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020
SB-59-3 3 9/22/2010 0.0175 U <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 0.025 0.027 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020SB-59-5 5 9/22/2010 0.0175 U <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 0.041 0.075 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020
SB-59-10 10 9/22/2010 0.08259 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 0.041 <0.020 0.085 0.22 0.052 0.069 0.069 0.059 0.056 <0.020 0.076 0.045SB-60-0 0 9/22/2010 0.0175 U <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020SB-60-5 5 9/22/2010 0.01772 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 0.027 <0.020 0.026 0.030 <0.020 0.032 <0.020 <0.020 <0.020 <0.020 0.020 <0.020
SB-60-10 10 9/22/2010 0.0175 U <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020
SB-61-0 0 9/22/2010 0.0175 U <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020SB-61-5 5 9/22/2010 0.01762 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 0.026 0.025 <0.020 0.022 <0.020 <0.020 <0.020 <0.020 0.021 <0.020
SB-61-10 10 9/22/2010 0.01765 <0.020 <0.020 <0.020 <0.020 <0.020 0.038 <0.020 <0.020 <0.020 0.15 <0.020 0.025 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020
SB-62-0 0 9/22/2010 0.0175 U <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 0.024 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020SB-62-5 5 9/22/2010 0.0175 U <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020
SB-62-10 10 9/22/2010 0.01881 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 0.025 <0.020 0.036 0.034 <0.020 0.031 0.021 <0.020 <0.020 <0.020 0.031 <0.020SB-62-15 15 9/23/2010 0.0175 U <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020
SB-63-1 1 9/23/2010 0.0175 U 0.20 <0.020 <0.020 0.11 0.12 0.059 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020SB-63-5 5 9/23/2010 0.0175 U <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020
SB-63-10 10 9/23/2010 0.0175 U <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020SB-63-15 15 9/23/2010 0.02053 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 0.036 0.037 <0.020 0.033 0.027 0.021 <0.020 <0.020 0.023 <0.020
SB-64-1 1 9/22/2010 0.0175 U <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020SB-64-5 5 9/22/2010 0.0175 U <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020
SB-64-10 10 9/22/2010 0.0175 U <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020SB-64-15 15 9/22/2010 0.0175 U <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020
SB-65-1 1 9/23/2010 0.03804 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 0.031 <0.020 0.047 0.046 0.022 0.034 0.031 <0.020 0.027 <0.020 0.029 <0.020SB-65-5 5 9/23/2010 0.03645 0.062 <0.020 <0.020 0.036 0.039 0.021 0.024 <0.020 0.041 0.048 <0.020 0.035 0.031 0.024 0.024 <0.020 0.036 0.022
SB-65-10 10 9/23/2010 0.22148 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 0.10 <0.020 0.27 0.22 0.086 0.19 0.20 0.12 0.15 0.047 0.17 0.13SB-65-15 15 9/23/2010 0.0175 U <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020
SB-66-0 0 9/23/2010 0.0175 U 0.19 <0.020 <0.020 0.098 0.11 0.048 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020SB-66-5 5 9/23/2010 0.0175 U <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020
SB-66-10 10 9/23/2010 0.05114 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 0.027 <0.020 0.048 0.045 0.028 0.044 0.041 <0.020 0.037 <0.020 0.036 0.024
6 of 8
BaP
Equ
ival
ent
Nap
htha
lene
1-M
ethy
lnap
htha
lene
2-M
ethy
lnap
htha
lene
Ace
naph
thyl
ene
Ace
naph
then
e
Fluo
rene
Phe
nant
hren
e
Ant
hrac
ene
Fluo
rant
hene
Pyr
ene
Ben
zo(a
)ant
hrac
ene
*
Chr
ysen
e *
Ben
zo(b
)fluo
rant
hene
*
Ben
zo(k
)fluo
rant
hene
*
Ben
zo(a
)pyr
ene*
Dib
enz(
a,h)
Ant
hrac
ene
*
Ben
zo(g
,h,i)
Per
ylen
e
Inde
no(1
,2,3
-cd)
pyre
ne*
Pacific Gas and Electric Company Former Manufactured Gas SiteHistorical Soil Chemical Data - PAHs
TABLE A-5
PAHs (mg/kg)EPA METHOD 3545/8310
Depth(feet) DateSample ID
712 S. Sacramento Street, Lodi, California
SB-67-0 0 9/23/2010 0.0175 U <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 0.022 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020SB-67-5 5 9/23/2010 0.0175 U <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020
SB-67-10 10 9/23/2010 0.0175 U <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020
SB-68-0 0 9/23/2010 0.0175 U <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020SB-68-5 5 9/23/2010 0.0175 U <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020
SB-68-10 10 9/23/2010 0.0175 U <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020
SB-69-0 0 9/23/2010 0.0175 U <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 0.022 <0.020 0.029 0.027 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020SB-69-5 5 9/23/2010 0.0175 U 0.039 <0.020 <0.020 0.050 0.063 0.036 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020
SB-69-10 10 9/23/2010 0.04913 0.035 <0.020 0.021 <0.020 0.023 0.031 0.042 0.024 0.031 0.036 0.028 0.033 0.027 0.029 0.029 0.025 0.032 0.029TP-1-0.5' 0.5 7/12/2010 0.16558 <0.020 <0.020 <0.020 0.026 <0.020 <0.020 0.12 <0.020 0.26 0.33 0.054 0.098 0.13 0.078 0.12 <0.020 0.22 0.15TP-1-3' 3 7/12/2010 0.0175 U <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 0.023 0.032 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 0.020 <0.020TP-1-6' 6 7/12/2010 0.0175 U <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020
TP-2-0.5' 0.5 7/12/2010 1.3059 <0.20 <0.20 <0.20 0.25 <0.20 <0.20 0.73 <0.20 1.4 1.7 0.38 0.69 0.86 0.61 0.95 <0.20 2.2 1.3TP-2-3' 3 7/12/2010 0.16315 <0.020 <0.020 <0.020 0.024 <0.020 <0.020 0.065 <0.020 0.18 0.23 0.048 0.085 0.12 0.071 0.12 <0.020 0.23 0.15TP-2-6' 6 7/12/2010 6.777 <1.0 <1.0 <1.0 <1.0 <1.0 <1.0 7.6 <1.0 16 20 2.3 3.7 4.0 2.7 5.1 <1.0 9.9 5.7
TP-2-9' A 9 7/12/2010 0.0194 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 0.028 0.035 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 0.048 0.029TP-3-0.5' 0.5 7/12/2010 27.616 <2.0 <2.0 <2.0 5.4 <2.0 <2.0 21 <2.0 44 46 10 19 24 19 18 3.9 40 28TP-3-3' 3 7/12/2010 0.8562 <0.10 <0.10 <0.10 0.11 <0.10 <0.10 0.49 <0.10 1.3 1.4 0.33 0.64 0.76 0.57 0.55 0.12 1.3 0.93TP-3-6' 6 7/12/2010 0.8916 <0.10 <0.10 <0.10 <0.10 <0.10 <0.10 0.69 <0.10 1.4 1.5 0.37 0.64 0.72 0.62 0.58 0.13 1.3 0.90
TP-4-0.5' 0.5 7/12/2010 0.0388 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 0.039 0.055 <0.020 0.020 0.023 <0.020 0.028 <0.020 0.043 0.029TP-4-3' 3 7/12/2010 0.0175 U <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020TP-4-6' 6 7/12/2010 0.0175 U <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020
TP-5-0.5' 0.5 7/13/2010 0.05599 0.045 <0.020 <0.020 <0.020 <0.020 <0.020 0.036 <0.020 0.076 0.098 <0.020 0.029 0.039 0.020 0.040 <0.020 0.090 0.054TP-5-3' 3 7/13/2010 0.0175 U <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020TP-5-6' 6 7/13/2010 0.0175 U <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020
TP-6-0.5' 0.5 7/13/2010 2.778 <0.40 <0.40 <0.40 <0.40 <0.40 <0.40 2.5 <0.40 4.3 4.8 0.86 1.4 1.5 1.3 2.1 <0.40 3.6 2.3TP-6-3' 3 7/13/2010 0.0175 U <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020TP-6-6' 6 7/13/2010 0.0175 U <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 0.022 0.027 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 0.025 <0.020
TP-7-25S 1.17 7/12/2010 2.76 <0.40 <0.40 <0.40 0.57 <0.40 <0.40 2.4 <0.40 3.7 4.3 0.80 1.2 1.5 1.1 2.1 <0.40 4.3 2.4TP-7-25D 2.67 7/12/2010 1.5662 0.28 <0.20 <0.20 0.25 <0.20 <0.20 1.2 <0.20 2.1 2.7 0.39 0.62 0.86 0.61 1.2 <0.20 2.5 1.4TP-7-40S 1.17 7/12/2010 0.33902 0.038 <0.020 <0.020 0.047 <0.020 <0.020 0.31 0.036 0.48 0.54 0.12 0.18 0.20 0.13 0.26 0.033 0.29 0.21TP-7-40D 2.67 7/12/2010 0.0214 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 0.031 0.038 <0.020 <0.020 0.029 <0.020 <0.020 <0.020 0.046 0.030TP-8-0.5' 0.5 7/13/2010 45.532 3.8 <2.0 <2.0 2.9 <2.0 <2.0 18 2.7 45 50 14 20 23 18 35 4.8 48 32TP-8-3' 3 7/13/2010 0.5217 0.031 <0.020 <0.020 0.046 <0.020 <0.020 0.19 0.027 0.61 0.73 0.20 0.30 0.31 0.25 0.39 0.055 0.47 0.34TP-8-6' 6 7/13/2010 0.13354 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 0.031 <0.020 0.10 0.14 0.042 0.064 0.087 0.066 0.10 <0.020 0.14 0.10
TP-9-0.5' 0.5 7/13/2010 54.226 <2.0 <2.0 <2.0 2.4 <2.0 <2.0 8.4 <2.0 44 54 13 19 27 21 42 5.4 67 41TP-9-3' 3 7/13/2010 3.205 <0.40 <0.40 <0.40 0.41 <0.40 <0.40 2.1 <0.40 4.0 5.0 0.76 1.1 1.7 1.2 2.5 <0.40 4.2 2.6TP-9-6' 6 7/13/2010 0.6713 <0.10 <0.10 <0.10 <0.10 <0.10 <0.10 0.18 <0.10 0.72 0.89 0.24 0.33 0.32 0.29 0.52 <0.10 0.71 0.46
TP-9-9' A 9 7/13/2010 0.79 0.34 <0.10 <0.10 0.13 <0.10 <0.10 0.66 <0.10 1.2 1.6 0.20 0.30 0.38 0.27 0.63 <0.10 0.93 0.55TP-10-0.5' 0.5 7/13/2010 0.2233 0.029 <0.020 <0.020 0.054 <0.020 <0.020 0.24 <0.020 0.40 0.49 0.076 0.12 0.13 0.087 0.17 0.020 0.23 0.16TP-10-3' 3 7/13/2010 1.6857 <0.20 <0.20 <0.20 0.21 <0.20 <0.20 0.50 <0.20 1.9 2.3 0.42 0.67 0.94 0.59 1.3 <0.20 2.5 1.5TP-10-6' 6 7/13/2010 0.15649 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 0.037 <0.020 0.19 0.25 0.038 0.059 0.090 0.057 0.12 <0.020 0.23 0.14
TP-11-0.5' 0.5 7/13/2010 89.456 5.8 <4.0 <4.0 <4.0 <4.0 <4.0 22 <4.0 80 95 30 46 47 42 68 9.4 84 59TP-11-3' 3 7/13/2010 31.31 1.2 <1.0 <1.0 2.5 <1.0 <1.0 4.1 <1.0 23 30 6.8 11 17 12 24 3.0 45 26TP-11-6' 6 7/13/2010 1.9426 <0.20 <0.20 <0.20 0.43 <0.20 <0.20 0.78 <0.20 2.0 2.4 0.55 0.86 1.1 0.85 1.5 <0.20 2.4 1.5
TP-11-9' A 9 7/13/2010 4.8578 1.5 <0.40 <0.40 1.7 <0.40 0.41 8.5 0.56 8.1 8.8 2.0 2.8 2.5 2.3 3.7 0.47 4.1 2.9AK-1-30" 2.5 7/15/2010 0.29454 <0.020 <0.020 <0.020 0.040 <0.020 <0.020 0.081 <0.020 0.28 0.32 0.078 0.15 0.19 0.18 0.20 0.036 0.57 0.36
7 of 8
BaP
Equ
ival
ent
Nap
htha
lene
1-M
ethy
lnap
htha
lene
2-M
ethy
lnap
htha
lene
Ace
naph
thyl
ene
Ace
naph
then
e
Fluo
rene
Phe
nant
hren
e
Ant
hrac
ene
Fluo
rant
hene
Pyr
ene
Ben
zo(a
)ant
hrac
ene
*
Chr
ysen
e *
Ben
zo(b
)fluo
rant
hene
*
Ben
zo(k
)fluo
rant
hene
*
Ben
zo(a
)pyr
ene*
Dib
enz(
a,h)
Ant
hrac
ene
*
Ben
zo(g
,h,i)
Per
ylen
e
Inde
no(1
,2,3
-cd)
pyre
ne*
Pacific Gas and Electric Company Former Manufactured Gas SiteHistorical Soil Chemical Data - PAHs
TABLE A-5
PAHs (mg/kg)EPA METHOD 3545/8310
Depth(feet) DateSample ID
712 S. Sacramento Street, Lodi, California
AK-1-38" 3.17 7/15/2010 0.10127 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 0.026 <0.020 0.078 0.096 0.024 0.047 0.072 0.068 0.068 <0.020 0.23 0.13AK-2-20" 1.7 7/15/2010 0.0385 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 0.033 0.048 <0.020 0.020 0.025 <0.020 0.027 <0.020 0.060 0.034AK-2-34" 2.83 7/15/2010 0.0175 U <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020AK-3-17" 1.42 7/15/2010 0.0175 U <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020
Table Notes:Bold values represent positive detections.U - Indicates carcinogenic PAHs were not detected at or above reporting limits, and the reported BaPe concentration was calculated using 1/2 the reporting limit for carcinogenic compounds.* - Denotes PAH compound included in calculation of BaP equivalent concentration.< - Indicates constituent not detected at concentrations equal to or greater than the specified reporting limit.-- Not analyzed.A - Sample extracted outside recommended holding time.
Abbreviations:PAHs - Polynuclear aromatic hydrocarbonsDUP - Indicates duplicate sample.EPA - Environmental Protection Agencymg/kg - Milligrams per kilogramBaPe: benzo(a)pyrene and equivalents (OEHHA, 1994)
8 of 8
EPA Method 7471ASb As Ba Be Cd Cr Co Cu Pb Mo Ni Se Ag Tl V Zn Hg
(mg/L) (mg/L) (mg/L) (mg/L) (mg/L) (mg/L) (mg/L) (mg/L) (mg/L) (mg/L) (mg/L) (mg/L) (mg/L) (mg/L) (mg/L) (mg/L) (mg/L)GW-1 61 10/17/2008 <0.015 <0.01 0.2 <0.001 <0.005 <0.005 <0.005 <0.005 <0.01 0.0269 0.00621 <0.015 <0.005 <0.015 0.0134 0.0294 <0.0005GW-2 64 10/20/2008 <0.015 <0.01 0.261 <0.001 <0.005 <0.005 <0.005 <0.005 <0.01 0.0313 <0.005 <0.015 <0.005 <0.015 0.00818 0.208 <0.0005SB-18 65 11/4/2009 <0.0150 <0.0100 0.196² <0.0100 <0.0100 <0.0100 <0.0100 <0.0100 <0.0100 <0.0100 <0.0100 <0.0150 <0.00500 <0.0150 0.0163 0.0277 <0.000500SB-20 66.5 11/5/2009 <0.0150 <0.0100 0.151² <0.0100 <0.0100 <0.0100 <0.0100 <0.0100 <0.0100 <0.0100 <0.0100 <0.0150 <0.00500 <0.0150 0.0149 0.0172² <0.000500
Table Notes:Bold values represent positive detections.< - Indicates constituent not detected at concentrations equal to or greater than the specified reporting limit.
Abbreviations:EPA - Environmental Protection Agency Sb - Antimony Be - Beryllium Co - Cobalt Mo - Molybdenum Si - Silver Z - Zincmg/L - Milligrams per liter As - Arsenic Cd - Cadmium Cu - Copper Ni - Nickel Tl - Thallium Hg - Mercury
Ba - Barium Cr - Chromium Pb - Lead Se - Selenium V - Vanadium
Table A-6Historical Groundwater Chemical Data - Metals
Pacific Gas and Electry Company Former Lodi Manufactured Gas Plant Site712 S. Sacramento Street, Lodi, California
Sample ID Depth (feet) Date
EPA Method 6010B
app a_Historical Data_Lodi MGP.xlsx/A6 1 of 1 4/19/2011
EPA Method 5030B/8015BTPH-g TPH-d TPH-mo(ug/L) (ug/L) (ug/L)
GW-1 61 10/17/2008 91 230 <250GW-2 64 10/20/2008 <50 140 J <250SB-18 65 11/4/2009 <50 <50 <250SB-20 66.5 11/5/2009 <50 <50 <250
Table Notes:Bold values represent positive detections.
J - Indicates estimated value higher than the method detection limit, but below the laboratory reporting limit.
Abbreviations:EPA - Environmental Protection Agencyug/L - Micrograms per literTPH-g - Total petroleum hydrocarbons as gasolineTPH-d - Total Petroleum Hydrocarbons as diesel (processed using silica gel cleanup)TPH-mo - Total Petroleum Hydrocarbons as motor oil (processed using silica gel cleanup)
Sample IDDepth (feet) Date
< - Indicates constituent not detected at concentrations equal to or greater than the specified reporting limit.
Table A-7Historical Groundwater Chemical Data - Petroleum Hydrocarbons
Pacific Gas and Electric Company Former Lodi Manufactured Gas Plant Site712 S. Sacramento Street, Lodi, California
app a_Historical Data_Lodi MGP.xlsx/A7 1 of 1 4/19/2011
Benz
ene
Ethy
lben
zene
Tolu
ene
Xyle
ne (p
/m)
Xyle
ne (o
)
GW-1 61 10/17/2008 17 1.6 8.4 1.2 1.4GW-2 64 10/20/2008 <0.5 <1 <1 <1 <1SB-18 65 11/4/2009 <0.5 <1.0 <1.0 <1.0 <1.0SB-20 66.5 11/5/2009 <0.50 <1.0 <1.0 <1.0 <1.0
Table Notes:Bold values represent positive detections.
Abbreviations:EPA - Environmental Protection Agencyug/L - Micrograms per liter
< - Indicates constituent not detected at concentrations equal to or greater than the specified reporting limit.
Table A-8Historical Groundwater Chemical Data - BTEX
Pacific Gas and Electric Company Former Manufactured Gas Site712 S. Sacramento Street, Lodi, California
Sample IDDepth(feet) Date
EPA Method 5030B/8260B(ug/L)
1 of 1
EPA Method 9010C/9014Total Cyanide
(mg/L)GW-1 61 10/17/2008 <0.050GW-2 64 10/20/2008 <0.050SB-18 65 11/4/2009 <0.050SB-20 66.5 11/5/2009 <0.050
Table Notes:Bold values represent positive detections.< - Indicates constituent not detected at concentrations equal to or greater than the specified reporting limit.
Abbreviations:EPA - Environmental Protection Agencymg/L - Milligrams per liter
Table A-9Historical Groundwater Chemical Data - Cyanide
Pacific Gas and Electric Company Former Manufactured Gas Site712 S. Sacramento Street, Lodi, California
Sample ID Depth (feet) Date
app a_Historical Data_Lodi MGP.xlsx/A9 1 of 1 4/19/2011
Nap
htha
lene
1-M
ethy
lnap
htha
lene
2-M
ethy
lmap
htha
lene
Acen
apht
hyle
ne
Acen
apth
ene
Fluo
rene
Phen
anth
rene
Anth
race
ne
Fluo
rant
hene
Pyre
ne
Benz
o(a)
anth
race
ne
Chr
ysen
e
Benz
o(b)
fluor
anth
ene
Benz
o(k)
fluor
anth
ene
Benz
o(a)
pyre
ne
Dib
enz(
a,h)
anth
race
ne
Benz
o(g,
h,i)P
eryl
ene
Inde
no(1
,2,3
-cd)
pyre
ne
GW-1 61 10/17/2008 1.7 <1.0 <1.0 <1.0 2 <1.0 <1.0 <1.0 <1.0 <1.0 <1.0 <1.0 <1.0 <1.0 <0.2 <1.0 <1.0 <1.0GW-2 64 10/20/2008 <1.0 <1.0 <1.0 <1.0 <1.0 <1.0 <1.0 <1.0 <1.0 <1.0 <1.0 <1.0 <1.0 <1.0 <0.2 <1.0 <1.0 <1.0SB-18 65 11/4/2009 0.40 <0.20 <0.20 <0.20 <0.20 <0.20 <0.20 <0.20 <0.20 <0.20 <0.20 <0.20 <0.20 <0.20 <0.20 <0.20 <0.20 <0.20SB-20 66.5 11/5/2009 <0.20 <0.20 <0.20 <0.20 <0.20 <0.20 <0.20 <0.20 <0.20 <0.20 <0.20 <0.20 <0.20 <0.20 <0.20 <0.20 <0.20 <0.20
Table Notes:Bold values represent positive detections.< - Indicates constituent not detected at concentrations equal to or greater than the specified reporting limit.
Abbreviations:EPA - Environmental Protection Agencyug/L - Micrograms per literPAHs - Polynuclear aromatic hydrocarbons
Table A-10Historical Groundwater Chemical Data - PAHs
Pacific Gas and Electric Company Former Manufactured Gas Site712 S. Sacramento Street, Lodi, California
Sample IDDepth(feet) Date
PAHs(ug/L)
EPA METHOD 3545/8310
1 of 1
Modified ASTM D-1946
(%)
Ben
zene
Tolu
ene
Eth
ylbe
nzen
e
Tota
l Xyl
enes
Freo
n 12
Freo
n 11
Eth
anol
Ace
tone
Car
bon
Dis
ulfid
e
Met
hyl t
ert-b
utyl
eth
er
2-B
utan
one
(Met
hyl E
thyl
K
eton
e)
Hep
tane
Tric
hlor
oeth
ene
Tetra
chlo
roet
hene
2-H
exan
one
Sty
rene
Cum
ene
Pro
pylb
enze
ne
4-E
thyl
tolu
ene
1,3,
5-Tr
imet
hylb
enze
ne
1,2,
4-Tr
imet
hylb
enze
ne
1,1-
Difl
uoro
etha
ne
Nap
htha
lene
Hel
ium
SG-1S 5 7/15/2009 1.7 11 52 311 1.4 <1.6 3.2 68 <4.4 <1.0UJ 5.3 <1.2 <1.5 2.1 <5.8 <1.2 5.8 21 160 66 140 <3.8 <7.5 0.38SG-1D 8 7/15/2009 2.2 13 71 459 <2.1 <2.4 <4.0 78 <6.7 <1.5 3.9 <1.8 <2.3 3.9 <8.8 5.0 8.0 28 220 91 210 <5.8 <11 --SG-2S 5 7/14/2009 <12 3400 250 1340 <19 <21 <36 150 <59 <14UJ <11 <16 <20 <26 <78 <16 19 <19 70 41 120 <52 <100 --SG-2D 8 7/14/2009 <34 8000 690 3490 <53 <60 <81 260 <33 <38 <32 <44 <58 <72 <180 <46 <52 <53 91 69 160 <120 <220 --SG-3S 5 7/14/2009 <3.0 120 28 188 <4.6 <5.2 <8.8 71 <14 <3.4UJ <2.8 <3.8 <5.0 <6.3 <19 <4.0 10 31 210 60 170 <13 <24 --
DUP-1 (SG-3S) 5 7/14/2009 1.4 120 30 200 1.0 1.3 <1.6 85 <2.7 <0.63UJ 3.2 1.0 2.1 3.5 <3.6 <0.74 11 32 210 60 180 <2.4 23 --SG-3D 8 7/15/2009 1.3 36 23 134 <0.97 1.4 <1.8 18 <3.0 <0.71UJ 2.6 1.7 <1.0 9.0 4.2 <0.83 10 48 310 88 240 <2.6 15 --SG-4S 5 7/14/2009 4.6 6.9 40 252 <1.5 1.8 <2.9 82 34 <1.1UJ 4.0 <1.2 6.2 2.6 <6.2 <1.3 22 12 83 29 59 <4.1 <8.0 --SG-4D 8 7/14/2009 7.5 9.9 42 250 <8.2 <9.4 <16 210 <26 <6.0UJ 7.8 <6.8 <9.0 <11 <34 <7.1 27 10 72 26 45 <22 <44 --SG-5S 5 7/16/2009 <2.7 36 3.7 26.3 <4.2 <4.7 <7.9 180 <13 <3.0 4.4 <3.4 <4.5 <5.7 <17 <3.6 5.6 9.6 66 26 66 <11 <22 --SG-5D 8 7/16/2009 <2.8 51 <3.9 19.8 <4.4 <5.0 16 250 <14 <3.2 8.1 <3.7 <4.8 <6.1 <18 <3.8 <4.4 16 110 50 120 5.1J <23 <0SG-6S 5 7/16/2009 <2.8 570 37 182 <4.3 <4.9 <8.2 28 <14 <3.2 4.0 7.6 <4.7 <5.9 <18 <3.7 <4.3 <4.3 7.8 <4.3 11 <12 <23 --
DUP-2 (SG-6S) 5 7/16/2009 <2.7 480 33 171 <4.2 <4.8 <8.0 26 <13 <3.1 3.9 6.8 <4.6 <5.8 <18 <3.6 <4.2 <4.2 8.0 <4.2 11 <12 <22 --SG-6S (LAB DUP) -- -- <5.6 560 32 158 <8.6 <9.8 <16 30 <27 <6.3 <5.2 7.5 <9.4 <12 <36 <7.4 <8.6 <8.6 <8.6 <8.6 11 <24 <46 --
SG-6D 8 7/16/2009 <5.4 1000 69 340 <8.3 <9.4 <16 60 <26 <6.0 6.9 13 <9.0 <11 <34 <7.2 <8.2 <8.2 12 <8.2 16 <23 <44 --EB-1 -- 7/16/2009 <3.0 3.6 <4.1 <4.1 <4.7 <5.4 <9.0 300 <15 <3.4 4.2 <3.9 <5.1 <6.5 <20 <4.1 <4.7 <4.7 <4.7 <4.7 <4.7 <13 <25 --
Table Notes:Bold value denotes values that exceed the method detection or reporting limit.Only analytes detected above the method reporting limit are shown.µg/m3 - micrograms per cubic meter% - percent< - Indicates constituent not detected at concentration equal to or greater than the specified reporting limit.J - Estimated value; concentration is above the method detection limit, but below the method reporting limit.UJ - Non-detected compound associated with low bias in the continuing calibration verification (CCV).
Abbreviations:bgs - below ground surface
TABLE A-11Historical Soil Vapor Chemical Data
Pacific Gas and Electric Company Former Manufactured Gas Site712 S. Sacramento Street, Lodi, California
Sample NameSample Depth
(feet bgs) Sample Date
Method Modified TO-15 Low Level
(µg/m3)
1 of 1
FINAL HUMAN HEALTH RISK ASSESSMENT / FEASIBILITY STUDY / REMOVAL ACTION WORKPLAN FORMER LODI MANUFACTURED GAS PLANT
APPENDIX B Applicable or Relevant and Appropriate Requirements
Human Health Risk Assessment / Feasibility Study / Removal Action Workplan
Former Lodi Manufactured Gas Plant PN: 185702232
July 11, 2012
FINAL HUMAN HEALTH RISK ASSESSMENT / FEASIBILITY STUDY / REMOVAL ACTION WORKPLAN FORMER LODI MANUFACTURED GAS PLANT
Potential Chemical-Specific Requirements
The following requirements may be considered chemical-specific requirements for the cleanup:
Title 22, California Code of Regulations, Chapter 11, Article 3 (Characteristics of Hazardous Waste). If a generator determines that a substance is a waste, the waste must be handled as a hazardous waste, if it meets the criteria specified in this article. This ARAR is relevant to the site remediation, if materials are removed and hauled from the site and the materials are classified as California hazardous waste.
Title 22, California Code of Regulations, Section 66268.1, Land Disposal Restrictions. These restrictions identify hazardous wastes that are prohibited from land disposal (i.e., ‘land ban’). This ARAR is relevant to the site remediation, if materials are removed and hauled from the site and the materials are classified as California hazardous waste.
Title 22, California Code of Regulations, Section 66699, Land Disposal Criteria for California Hazardous Waste (i.e., Persistent and Bioaccumulative Toxic Waste). Total threshold limit concentrations (TTLC) and soluble threshold limit concentration (STLC) criteria are intended to determine the type of landfill that a waste material must be sent to (i.e., criteria to determine if a material is classified as California hazardous waste). Where TTLC or STLC criteria are exceeded, the waste must in general be sent to a Class I, hazardous waste landfill, unless specific exemptions apply. This ARAR is relevant to the site remediation if materials are removed and hauled from the site and the materials are classified as California hazardous waste.
Potential Action-Specific Requirements
The following federal and state requirements may be considered action-specific requirements for the site cleanup.
Air Emissions Standards. Regulations issued by the San Joaquin Valley Air Pollution Control District may apply to remedial actions that could involve the release of vapors and/or particulates. In particular, soil excavation or grading may be a source of fugitive dust emissions and vapor release. District regulations that may be applicable include:
Regulation VIII, Rules 8021, 8031, and 8041 – Controlling fugitive dust emissions during construction, excavation, and related activities including handling and storage of bulk materials and carryout/trackout of materials from the site.
Title 22, Section 67391.1, California Code of Regulations – Land Use Covenants. These regulations require land use covenants to be included as part of a remedial
FINAL HUMAN HEALTH RISK ASSESSMENT / FEASIBILITY STUDY / REMOVAL ACTION WORKPLAN FORMER LODI MANUFACTURED GAS PLANT
action plan when levels of hazardous substances will remain which do not allow for unrestricted use and deed restrictions are included as part of the remedy.
Hazardous Waste Generator and Treatment, Storage, and Disposal Facility Requirements. Off-site disposal may produce hazardous wastes that require special management in accordance with the State of California’s hazardous waste management program (California Code of Regulations, Title 22, Section 66262.10). These requirements could be triggered because excavated soils in select areas may contain constituents that exceed federal or state hazardous waste regulatory threshold concentrations. Federal and state regulations related to the generation, treatment, storage, or disposal of hazardous waste are ARARs for the site.
California Health and Safety Code, Section 25123.3(b)(4)(B). A generator that accumulates hazardous waste generated and held on-site for 90 days or less for the purposes of off-site transportation does not require a storage facility permit if specific requirements are met. This statute will be triggered if soils are excavated, stockpiled, and then transported off-site for disposal.
Porter Cologne Water Quality Control Act. This Act requires provisions to protect ground and surface water during the proposed remedial activities. The Act requires development of a Storm Water Pollution Prevention Plan (SWPPP) and filing of a Notice of Intent (NOI) with the State Water Resources Control Board (SWRCB) for storm water control, depending in part upon the size of the area of disturbance during the cleanup.
Potential Location-Specific Requirements
The following requirements may be considered location-specific requirements for the site cleanup.
National Archaeological and Historic Preservation Act. These regulations (36 CFR Part 65) provide for the protection of any historically significant artifacts that may be unearthed during excavation activities. No such artifacts have been found during investigation activities conducted at the site to date. Appropriate actions will be taken if historically significant artifacts are unearthed during excavation.
Endangered Species Act. The Endangered Species Act of 1973 (16 United States Code, Part 1451) and comparable California endangered species regulations require that actions do not further endanger listed species or their habitats. There are no known or suspected endangered species or critical habitat areas present at the site.
Additional Potential Requirements
The following are additional potential requirements that may apply to the site cleanup
FINAL HUMAN HEALTH RISK ASSESSMENT / FEASIBILITY STUDY / REMOVAL ACTION WORKPLAN FORMER LODI MANUFACTURED GAS PLANT
California Human Health Screening Level (CHHSLs) for Use in Evaluation of Contaminated Properties, January 2005. CHHSLs are screening levels for selected hazardous chemicals in soil to assess potential human health risk associated with direct exposure to soil (including inhalation of particles) and inhalation of volatile vapors. The screening levels are similar to the USEPA Region 9 PRGs with California-specific toxicity factors. These values can be used as conservative cleanup goals for contaminants in soil in the absence of site-specific risk analysis. The values are conservative if there are no additional exposure pathways (i.e., not already incorporated into the CHHSL) and as long as there are not multiple contaminants.
FINAL HUMAN HEALTH RISK ASSESSMENT / FEASIBILITY STUDY / REMOVAL ACTION WORKPLAN FORMER LODI MANUFACTURED GAS PLANT
APPENDIX C Administrative Record List
Human Health Risk Assessment / Feasibility Study / Removal Action Workplan
Former Lodi Manufactured Gas Plant PN: 185702232
July 11, 2012
FINAL HUMAN HEALTH RISK ASSESSMENT / FEASIBILITY STUDY / REMOVAL ACTION WORKPLAN FORMER LODI MANUFACTURED GAS PLANT
Administrative Record PG&E Former Lodi MGP Site
712 South Sacramento Street, Lodi, California Human Health Risk Assessment / Feasibility Study / Remedial Action Workplan
This Administrative Record is provided in accordance with Subpart I of the National Contingency Plan to identify documents that were relied upon or considered when approving the subject remedial action. California Environmental Protection Agency (Cal/EPA), 1994. Preliminary Endangerment
Assessment Guidance Manual. Department of Toxic Substances Control (DTSC). January.
California Environmental Protection Agency (Cal/EPA), 2009. Interim Guidance Evaluating
Human Health Risks from Total Petroleum Hydrocarbons (TPH). Department of Toxic Substances Control, Human and Ecological Risk Division (DTSC-HERD). June 16.
City of Lodi. 2006. Reynolds Ranch Draft Environmental Impact Report. City of Lodi Water Pollution Control Facility. 2006. Groundwater Investigation Existing
Conditions Report. October. Department of Toxic Substances Control (DTSC), 2001. Information Advisory – Clean Imported
Fill Material. October.
Department of Toxic Substances Control (DTSC), 2001. Guidance for Developing Transportation Plans for Removal or Remedial Actions (Interim Final). December 5.
Department of Toxic Substances Control (DTSC), 2003. Advisory – Active Soil Gas Investigations. January 28.
Department of Toxic Substances Control (DTSC), 2005. Use of California Human Health
Screening Levels (CHHSLs) in Evaluation of Contaminated Properties. January. Department of Toxic Substances Control (DTSC), 2009. Use of Northern and Southern California
Polynuclear Aromatic Hydrocarbon (PAH) Studies in Manufactured Gas Plant Site Cleanup Process. July 1.
Department of Toxic Substances Control (DTSC), 2009. Letter approving Well Abandonment
Work Plan. June 10.
FINAL HUMAN HEALTH RISK ASSESSMENT / FEASIBILITY STUDY / REMOVAL ACTION WORKPLAN FORMER LODI MANUFACTURED GAS PLANT
Department of Toxic Substances Control (DTSC), 2009. Letter approving Additional On-site and Off-site Investigation Work Plan. October 26.
Department of Toxic Substances Control (DTSC), 2009b. Letter approving Revised Off-site Soil
Investigation Work Plan. October 15. Department of Toxic Substances Control (DTSC), 2009c. Arsenic Strategies – Determination of Arsenic
Remediation – Development of Arsenic Cleanup Goals. January 16. Garcia and Associates (GANDA). Final Historical Resources Evaluation Report for the Pacific Gas and
Electric Lodi Former Manufactured Gas Plant General Shop and Store Room/Meter House Building, Lodi, San Joaquin County, California. September 2007.
Iris Environmental, 2010. Memorandum: Follow Up from September 29th, 2010 Health Risk Assessment
Scoping Meeting: PG&E Former Lodi Manufactured Gas Plant Site. November 11. Iris Environmental, 2011. Draft Human Health Risk Assessment, Former Lodi Manufactured Gas Plant,
712 South Sacramento Street, Lodi, California. March. San Francisco Bay Regional Water Quality Control Board, 2008. Screening for Environmental Concerns
at Sites with Contaminated Soil and Groundwater. Interim Final, May. Stantec, 2008. Remedial Investigation Work Plan. August 7. Stantec, 2009. Active Soil Gas Sampling Work Plan. January 21. Stantec, 2009. Semi-Permanent Soil Vapor Probe Installation and Soil Vapor Sampling Procedures Work
Plan. July 1. Stantec, 2009. Well Abandonment Work Plan. February 3. Stantec, 2009. Well Destruction Report. August 13. Stantec, 2009. Additional On-site and Off-site Investigation Work Plan. September 28. Stantec, 2009. Revised Off-site Soil Investigation Work Plan. October 8. Stantec, 2009. Response to Comments – DTSC Review of Off-site Soil Investigation Work Plan.
October 1. Treadwell & Rolo. Report of Third Quarter 2007 Groundwater Monitoring. January 8, 2008. United States Environmental Protection Agency (USEPA), 1973. Processes, Procedures and Methods to
Control Pollution Resulting From All Construction Activity. 430/9-73-007.
FINAL HUMAN HEALTH RISK ASSESSMENT / FEASIBILITY STUDY / REMOVAL ACTION WORKPLAN FORMER LODI MANUFACTURED GAS PLANT
United States Environmental Protection Agency (USEPA), 2000. Test Methods for Evaluating Solid Waste, Physical/Chemical Methods (SW 846). November.
United States Environmental Protection Agency, 2009. Regional Screening Levels. December.
FINAL HUMAN HEALTH RISK ASSESSMENT / FEASIBILITY STUDY / REMOVAL ACTION WORKPLAN FORMER LODI MANUFACTURED GAS PLANT
APPENDIX D Human Health Risk Assessment (Iris Environmental) –
submitted electronically (refer to CD) Human Health Risk Assessment / Feasibility Study / Removal Action
Workplan Former Lodi Manufactured Gas Plant
PN: 185702232 July 11, 2012
FINAL
HUMAN HEALTH RISK ASSESSMENT FORMER LODI MANUFACTURED GAS PLANT
712 SOUTH SACRAMENTO STREET LODI, CALIFORNIA
Prepared for:
Pacific Gas and Electric Company San Francisco, California
Prepared by:
IRIS ENVIRONMENTAL 1438 Webster Street, Suite 302
Oakland, California 94612 (510) 834-4747
June 2011 Project No. 10-718-A
FINAL Human Health Risk Assessment June 2011 Former Lodi Manufactured Gas Plant Site
i IRIS ENVIRONMENTAL
TABLE OF CONTENTS Page EXECUTIVE SUMMARY .......................................................................................................ES-1 1.0 INTRODUCTION AND OBJECTIVES ......................................................................... 1-1 2.0 SITE DESCRIPTION AND SUMMARY OF SITE INVESTIGATIONS ..................... 2-1
2.1 Site Description .................................................................................................... 2-1 2.2 Summary of Site Investigations ........................................................................... 2-2 2.3 Summary of Nature and Extent of Impacts .......................................................... 2-4
3.0 DATA EVALUATION AND SELECTION OF CHEMICALS OF POTENTIAL CONCERN ...................................................................................................................... 3-1 3.1 Data Evaluation .................................................................................................... 3-1 3.2 Selection of Chemicals of Potential Concern ...................................................... 3-1
4.0 EXPOSURE ASSESSMENT .......................................................................................... 4-1 4.1 Chemical Sources and Potential Release Mechanisms ........................................ 4-1 4.2 Identification of Potentially Exposed Populations ............................................... 4-1 4.3 Exposure Pathways .............................................................................................. 4-2
4.3.1 Complete Exposure Pathways.................................................................. 4-2 4.3.2 Incomplete Exposure Pathways ............................................................... 4-3
4.4 Human Intake Assumptions ................................................................................. 4-3 4.5 Estimation of Representative Exposure Concentrations ...................................... 4-3
4.5.1 Estimation of COPC Concentrations in Soil ............................................ 4-4 4.5.2 Estimation of Air Concentrations Resulting from Emissions from Soil.. 4-5
5.0 TOXICITY ASSESSMENT ............................................................................................ 5-1 5.1 Toxicity Assessment for Carcinogenic Effects .................................................... 5-1 5.2 Toxicity Assessment for Noncarcinogenic Effects .............................................. 5-2 5.3 Toxicity Assessment for Lead ............................................................................. 5-3
6.0 RISK CHARACTERIZATION ....................................................................................... 6-1 6.1 Methodology ...................................................................................................... 6-1
6.1.1 Carcinogenic Health Effects .................................................................... 6-2 6.1.2 Noncarcinogenic Health Effects .............................................................. 6-3
6.2 Results of Cancer Risk and Noncancer Hazard Assessment ............................... 6-5 6.2.1 Current Land-Use Scenario ...................................................................... 6-5 6.2.2 Future Land-Use Scenario ....................................................................... 6-7 6.2.3 Uncertainties in Risk Characterization .................................................... 6-9
6.3 Summary and Conclusions .................................................................................. 6-9 7.0 REMEDIAL ACTION GOALS ...................................................................................... 7-1
7.1 Overview of the Remedial Action Goals ............................................................. 7-1 7.2 Derivation of Risk-Based Screening Concentrations for Soil ............................. 7-2
7.2.1 Methodology ............................................................................................ 7-2 7.3 Derivation of Ambient Based Screening Concentrations for Soil ....................... 7-5 7.4 Results: Comparison of Soil RBSCs and ABSCs to Detected Concentrations .. 7-6 7.5 Demonstrating Attainment of the Remedial Action Goal: Post Remediation Risk
Assessment ............................................................................................... 7-6 8.0 REFERENCES ................................................................................................................ 8-1
FINAL Human Health Risk Assessment June 2011 Former Lodi Manufactured Gas Plant Site
ii IRIS ENVIRONMENTAL
LIST OF TABLES Table 1 Summary of Chemicals Included in the Risk Assessment: Exposed Soils (0-1.5
feet bgs) Table 2 Summary of Chemicals Included in the Risk Assessment: Soils (0-10 feet bgs) Table 3 Summary of Chemicals Included in the Risk Assessment: Soil Gas Table 4 Exposure Parameters Table 5 Equations Used to Calculate Exposure Concentrations and Chronic Daily Intakes:
Residential Scenario Table 6 Equations Used to Calculate Exposure Concentrations and Chronic Daily Intakes:
Commercial Worker Scenario Table 7 Exposure Point and Predicted Outdoor Air Concentrations for Chemicals of
Potential Concern in Exposed Soils: Current Off-site Residential and Commercial Scenarios
Table 8 Exposure Point and Predicted Outdoor Air Concentrations for Chemicals of Potential Concern in Soils: Future On-site Residential Scenario
Table 9 Chemical Properties of the Chemicals of Potential Concern Table 10 Carcinogenic and Noncarcinogenic Toxicity Values for Chemicals of Potential
Concern Table 11 Exposure Concentration and Chronic Daily Intake for Carcinogens in Exposed
Soils: Current Off-site Residential and Commercial Scenarios Table 12 Exposure Concentration and Chronic Daily Intake for Noncarcinogens in Exposed
Soils: Current Off-site Residential and Commercial Scenarios Table 13 Exposure Concentration and Chronic Daily Intake for Carcinogens in Soils:
Future On-site Residential Scenario Table 14 Exposure Concentration and Chronic Daily Intake for Noncarcinogens in Soils:
Future On-site Residential Scenario Table 15 Cancer Risks from Exposed Soils: Current Off-site Residential and Commercial
Scenarios Table 16 Noncancer Hazard Indices from Exposed Soils: Current Off-site Residential and
Commercial Scenarios Table 17 Lead Risk Evaluation: Current Off-site Residential Scenario Table 18 Cancer Risks from Soils: Future On-site Residential Scenario Table 19 Noncancer Hazard Indices from Soils: Future On-site Residential Scenario Table 20 Lead Risk Evaluation: Future On-site Residential Scenario Table 21 Outdoor Air Inhalation Cancer Risks and Noncancer Hazard Indices for VOCs in
Soil Gas: Current Off-site and Future On-site Residential Scenarios Table 22 Outdoor Air Inhalation Cancer Risks and Noncancer Hazard Indices for VOCs in
Soil Gas: Current Off-site Commercial Scenario Table 23 Vapor Intrusion Cancer Risks and Noncancer Hazard Indices for VOCs in Soil
Gas: Future On-site Residential Scenario Table 24 Soil Risk-Based or Ambient-Based Screening Concentrations: Future On-site
Residential Scenario Table 25 Summary Statistics for Ambient CPAH Data Table 26 Summary of Samples with Chemicals Above Risk-Based or Ambient-Based
Screening Concentrations
FINAL Human Health Risk Assessment June 2011 Former Lodi Manufactured Gas Plant Site
iii IRIS ENVIRONMENTAL
LIST OF FIGURES Figure 1 Site Vicinity Map Figure 2 Site Plan Showing Sample Locations Figure 3 Conceptual Site Model LIST OF ATTACHMENTS Attachment A Site Investigation Data Included in the HRA Attachment B Determination of Ambient Arsenic Concentrations Attachment C Data Statistical Evaluation Attachment D Modeling Methodologies Attachment E Uncertainties in the Risk Assessment Attachment F Sample RBSC Calculation for Naphthalene
FINAL Human Health Risk Assessment June 2011 Former Lodi Manufactured Gas Plant Site
iv IRIS ENVIRONMENTAL
LIST OF ACRONYMS ABSC ambient-based screening concentration
B(a)P benzo(a)pyrene
bgs below ground surface
BTEX Benzene, Toluene, Ethylbenzene, and Xylenes
Cal/EPA California Environmental Protection Agency
CDI chronic daily intake
CHHSL California Human Health Screening Level
COPC chemical of potential concern
CPAH carcinogenic polycyclic aromatic hydrocarbons
CSF cancer slope factor
CSM conceptual site model
DTSC Department of Toxic Substances Control
EC exposure concentration
EPC exposure point concentration
FS Feasibility Study
HEAST Health Effects Assessment Summary Tables
HERD Human and Ecologic Risk Division
HERO Office of Human and Ecological Risk
HRA human health risk assessment
HI hazard index
HQ hazard quotient
IRIS USEPA’s Integrated Risk Information System
LIW Lodi Iron Works
MGP manufactured gas plant
µg/m3 micrograms per cubic meter
µg/dL micrograms per deciliter
mg/kg milligrams per kilogram
mg/kg/day milligram of chemical per kilogram body weight per day
mg/m3 milligrams per cubic meter
mg/L milligrams per liter
NCEA National Center of Environmental Assessment
FINAL Human Health Risk Assessment June 2011 Former Lodi Manufactured Gas Plant Site
v IRIS ENVIRONMENTAL
NCP National Contingency Plan
ND non-detect
NOEL No observed effects level
OEHHA Cal/EPA Office of Environmental Health Hazard Assessment
PAH polynuclear/polycyclic aromatic hydrocarbon
PEA Preliminary Endangerment Assessment
PEF particulate emission factor
PG&E Pacific Gas and Electric Company
PRG preliminary remediation goal
RAW Removal Action Workplan
RBSC risk-based screening concentration
REL reference exposure limit
RfD/RfC reference dose/reference concentration
RI Remedial Investigation
RL reporting limit
STSC Superfund Health Risk Technical Support Center
TF transfer factor
TPH total petroleum hydrocarbons
TRW ALM USEPA Technical Review Workgroup Adult Lead Methodology
UCL upper confidence limit
URF unit risk factor
USEPA United States Environmental Protection Agency
UTL upper tolerance limit
VF volatilization factor
VOC volatile organic compound
FINAL Human Health Risk Assessment June 2011 Former Lodi Manufactured Gas Plant Site
ES-1 IRIS ENVIRONMENTAL
EXECUTIVE SUMMARY Iris Environmental prepared this human health risk assessment (HRA) on behalf of Pacific Gas and Electric Company (PG&E) for the Former Lodi Manufactured Gas Plant (MGP) Site (the “Site”). The Site was formerly a crude oil manufactured gas plant, which was previously operated and is currently owned by PG&E. The 0.73-acre Site is currently vacant and fenced. Objectives of the HRA The primary purpose of this HRA, as presented and further outlined in a memorandum submitted to the Department of Toxic Substances Control (DTSC) (Iris Environmental, 2010), is to evaluate potential risks to current and/or future populations that could be exposed to Site-related chemicals at the former Lodi MGP Site. As the Site is currently vacant and fenced, the scope of the HRA focuses primarily on evaluations associated with the potential future unrestricted use of the Site for hypothetical residential purposes. The results of the HRA will be used to identify areas of the Site where remediation, or other forms of risk management, may be appropriate, with the overall goal of long-term protection of human health and the environment. Site Investigations Site investigation conducted at the Site included the following:
• Mid-1980s: One surface soil sample was collected at the Site by PG&E in the mid-1980s. The location of this historical sample is unknown. The soil sample was analyzed for polycyclic aromatic hydrocarbons (PAHs), arsenic, lead, mercury, and cyanide.
• 2006: In February 2006, nine surface soil samples were collected by ENV America in a
relative grid pattern across the Site. Soil samples were analyzed for total petroleum hydrocarbons as gasoline (TPHg); benzene, toluene, ethylbenzene and xylenes (BTEX); TPH as diesel (TPHd); TPH as motor oil (TPHmo); California Title 22 (CAM 17) Metals; VOCs; semi-VOCs (SVOCs [including PAHs]); polychlorinated biphenyls (PCBs); organochlorides; herbicides; and cyanide.
• 2008 and 2009: The Remedial Investigation (RI) was conducted by Stantec at the Site in
2008 and 2009 to characterize the levels and types of chemicals present in soils, soil gas, and groundwater for the purposes of remediation planning and implementation. During Phase I of the RI in October 2008, between three and seven soil samples were collected from 16 on-site soil borings advanced to a maximum depth of 15 feet below ground surface (bgs) and two grab groundwater samples were collected from 2 additional on-site borings advanced to first-encountered groundwater at approximately 65 feet bgs. A passive soil gas survey was conducted in October/November 2008 where samples were collected between 6.5 to 8 feet bgs at 17 locations at the Site and analyzed for VOCs and PAHs. Local metals background samples were also collected in November 2008 from 6 off-site locations at 0 and 2 feet bgs. Based on the result of the passive soil gas survey, an active soil gas survey was conducted in July 2009 and soil gas samples were collected
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at depth intervals of 5 feet bgs and 8 feet bgs from 6 locations and analyzed for VOCs. During Phase II of the RI in November 2009, between three to six soil samples were collected an additional 9 soil borings advanced at the Site, 8 soil borings within and adjacent to South Sacramento Street, and 12 soil borings at the adjacent LIW property. Soil borings were advanced to depths of 12 to 15 feet, with the exception of several on-site soil borings extended to depths ranging from 27 to 70 feet bgs. In addition, grab groundwater samples were collected from 2 of the on-site soil borings. All soil samples collected during Phase I and II of the RI were analyzed for TPHg, BTEX, TPHd, TPHmo, CAM 17 Metals, PAHs, and cyanide. Grab groundwatere samples were analyzed for for TPHg, BTEX, TPHd, TPHmo, dissolved CAM 17 Metals, PAHs, and cyanide.
• 2010: Remedial Refinement Sampling was conducted at the Site in 2010 by Stantec to
further characterize and delineate levels and types of chemicals present in soils for the purposes of remediation planning and implementation. The scope of work included excavation of 11 test pits to 9 feet bgs, and advancement of 21 direct-push soil borings to a maximum depth of 25 feet bgs to investigate various historical subsurface features and to provide additional delineation of chemical impacts to soils at the Site, and advancement of 5 direct-push soil borings to a maximum depth of 10 feet bgs within South Sacramento Street to provide additional delineation of chemical impacts to soil identified during previous work. Soil samples collected during the Remedial Refinement Investigation were analyzed for TPHg, BTEX, TPHd, TPHmo, CAM 17 Metals, PAHs, total cyanide, and/or ammonia.
Nature and Extent of Impacts The information on nature and extent of impacts has been primarily obtained from the RI Report (Stantec, 2010) and the Feasibility Study/Removal Action Workplan (FS/RAW) to which this HRA is an appendix. On-site Soils Historical gas manufacturing operations at the Site have resulted in chemical impacts to shallow soils in portions of the Site particularly between the ground surface and 5 feet bgs. Chemical impacts are primarily associated with petroleum hydrocarbons, PAHs, and lead. A former redwood oil storage tank appears to have been abandoned in place, and impacted soils have been observed within the fill material inside the former tank and beneath the tank to a depth of approximately 21 feet bgs in the immediate vicinity of the former tank. The vertical extent of chemical impacts have been delineated, and underlying soils to a depth of 65 feet bgs were observed to be unimpacted, indicating no potential threat to groundwater. A former oil conveyance pipeline may still be in place at the Site. Investigation of this feature has identified chemical impacts to depths ranging from 5 to 12 feet bgs.
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Two above-ground former MGP waste receptacles (identified on drawings as ‘former lampblack separators’) were historically located in the southeast quadrant of the Site. Investigation of this area has revealed the presence of approximately 1.5 feet of concrete underlain by native soils. Lampblack was identified between 5 and 5.5 feet bgs in one of three soil borings (SB-8) advanced beneath the former separator, and elevated concentrations of petroleum hydrocarbons and PAHs have been identified to 6.5 feet bgs. Former gas storage holder #3 was historically located in the southwest quadrant of the Site. The footprint of the holder extended beyond the current property boundary into South Sacramento Street, across the parcel of land sold to the City of Lodi for the purpose of street widening. Investigation of the historical gas storage holder #3 has revealed the presence approximately 3 feet of concrete, underlain by native soils impacted by lampblack and elevated PAHs to depths of 4 feet bgs. Historical investigations have identified several areas where chemical impacts to soil extend beyond the upper 5 feet bgs:
• Test Pit TP-2: Test pit TP-2, advanced near the northern property line, identified elevated concentrations of PAHs to 6 feet bgs. Based on data from surrounding soil borings, the extent of chemical impact at TP-2 appears to be limited in extent.
• Test Pit TP-11: Test pit TP-11, advanced west of the former lampblack separators,
identified elevated concentrations of PAHs to 9 feet bgs. Based on data from additional soil borings advanced in this area, the extent of chemical impact at TP-11 appears to be limited in extent.
• Southern Property Boundary: An area along the southern property boundary contains
elevated PAHs to a depth of approximately 6 feet bgs
• Eastern Property Boundary: An area along the eastern property boundary, in the vicinity of the former oil conveyance pipe, contains elevated PAHs, petroleum hydrocarbons, and lead to a depth of approximately 6 feet bgs.
Off-site Soils Investigation of soils beneath South Sacramento Street has identified chemical impacts to soils consistent with historical MGP operations. In general, shallow soils within the area of the street historically part of the Site (roughly to the current centerline of South Sacramento Street) contain shallow chemical impacts from elevated PAHs, petroleum hydrocarbons and lead, consistent with shallow soil conditions elsewhere on the Site. Deeper impacts (to 6 feet bgs) have been identified at locations in the center of the street, adjacent to the historical gas holders. Previous investigations identified two historical gas distribution pipelines leaving the Site from the former general shop and store room (see Figure 2). These conduits are severed approximately 15 feet into the Street, and underlying soils have not been impacted.
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Chemical impacts consistent with MGP waste products (i.e., elevated concentrations of petroleum hydrocarbons found with elevated concentrations of PAHs) have been identified in shallow soils on the Lodi Iron Works (LIW) property to the south. In general, these concentrations are present in surface soils, attenuate to below screening levels between the ground surface and 3 feet bgs, and are present within 15 feet of the fence line. Soil Gas Soil gas conditions beneath the Site have been characterized using passive and active soil gas sampling methods. The passive soil gas survey revealed relatively elevated mass of TPH, BTEX, naphthalene, and combined PAHs at SB-14, located along the southern edge of the Site. Relatively elevated mass of TPH and BTEX were also reported from SB-2, advanced adjacent to the former purifiers in the northern third of the Site. Based on results of the passive soil gas survey data, semi-permanent soil gas sampling points were installed at six locations. Soil gas sampling locations SG-2 and SG-6 corresponded to the highest reported concentrations of VOCs and/or naphthalene reported during the passive soil gas survey (SB-2 and SB-14, respectively). The highest concentrations of BTEX constituents in soil gas were reported in shallow and deep samples from SG-2 and SG-6. Detected concentrations of VOCs including naphthalene were, in general, low. However, note that the laboratory reporting limits for naphthalene in five samples (SG-2S, SG-2D, SG-4D, SG-6S, and SG-6D) considerably elevated (i.e., 6- to 29-times higher than the lowest laboratory reporting limit for naphthalene). Groundwater Low concentrations of petroleum hydrocarbons consistent with a weathered fuel product were detected in groundwater beneath the Site. Based on the chemical composition of constituents in groundwater, the significant vertical separation between impacted soils and first-encountered groundwater (greater than 40 feet), and the low migration potential of MGP-related constituents, these detections appear to be unrelated to historical site operations and warrant no further investigation. Groundwater sampling in the vicinity of the former MGP water supply wells confirms the wells did not act as pathways for migration of contaminants to groundwater. Identification of Chemicals of Potential Concern All data collected during the 2006 surface soil sampling, the 2008-2009 RI, and the 2010 Remedial Refinement Investigation were evaluated for use in the quantitative HRA. All chemicals that were detected above background/ambient levels in soils and all chemicals detected in soil gas were included as chemicals of potential concern (COPCs) in the quantitative analysis.
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Chemicals detected in soils that are included as COPCs in the quantitative HRA are as follows: various VOCs (including benzene, toluene, ethylbenzene, and xylenes [BTEX]); TPH (gasoline, diesel, and motor oil ranges); various PAHs, and various inorganics. Chemical detected in soil gas that are included as COPCs in the quantitative HRA are as follows: 1,1-difluoroethane, 1,2,4-trimethylbenzene, 1,3,5-trimethylbenzene, 2-butanone (MEK), 2-hexanone, 4-ethyltoluene, acetone, benzene, carbon disulfide, isopropylbenzene (cumene), ethanol, dichlorodifluoromethane (Freon 12), ethylbenzene, heptane, methyl tert-butyl ether (MTBE), naphthalene, propylbenzene, styrene, tetrachloroethene, toluene, trichlorofluoromethane (Freon 11), trichloroethene, and total xylenes. Potentially Exposed Populations and Complete Exposure Pathways The Site is currently vacant. Access to the Site is controlled by fencing topped with barbed wire. The Site is bounded on the west by South Sacramento Street and on the east by Union Pacific Railroad tracks. Immediately north of the Site is Jorge’s Auto Body, an auto-body repair shop. Immediately south of the Site is a vacant lot owned by Lodi Iron Works. Immediately across South Sacramento Street to the west is single-family residential housing. Under current conditions, the majority of the surface of the Site is unpaved. The primary pathway through which current off-site residents and off-site commercial workers could potentially be exposed to COPCs in soil or soil gas includes the inhalation of volatile constituents that have migrated up through the soil column into the ambient air and through the inhalation of fugitive dusts from the exposed soils at the Site. In the future, it is possible that the Site could be redeveloped for residential purposes and direct exposure to the COPCs in the surface and subsurface soils could occur. Thus, future on-site residents are assumed to be exposed to COPC in soil across the Site through direct contact (i.e., soil ingestion, dermal contact with soil), as well as through the inhalation of particulates/vapors that could be present in the indoor/ambient air. Results and Conclusions of the HRA Current Off-site Residential and Commercial Scenarios HRA results indicate that none of the chemicals detected in exposed surface soils and soil gas at the Site pose a significant health risk to current off-site residential and commercial populations. Estimated incremental cancer risks and noncancer HIs for these populations are well below 1 x 10-6 and 1, respectively. Further, levels of lead in exposed soils at the Site are not expected to result in an increase in blood lead levels above OEHHA’s benchmark value of 1 ug/dL for current off-site residential and commercial populations. Based on these conservative upper-bound risk estimates, remedial action, or other form of risk management, is not necessary to protect the health of current off-site residential and commercial populations. Future On-site Residential Scenario This HRA also evaluates potential health risks to future on-site residential populations. In the future, it is possible that the Site could be redeveloped for residential purposes and buildings
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could be constructed anywhere on the Site. The results of this HRA indicate that the estimated incremental cancer risks and noncancer hazards associated with COPCs in soil gas via vapor intrusion for future on-site residential populations are at or below acceptable levels (i.e., incremental cancer risks are equivalent to or below the lower end of the acceptable risk range of 1 x 10-6 to 1 x 10-4 and the noncancer HIs are below 1). We note, however, the estimated incremental cancer risks for the future on-site residential population are based on existing soil gas data collected during the RI. Soil sampling results have indicated areas of elevated benzene and/or naphthalene concentrations in soils (i.e., at SB-6 and SB-49) where no soil gas data was collected. These areas will be addressed in the Feasibility Study/Removal Action Workplan (FS/RAW). The estimated incremental cancer risks associated with COPCs in soils for the future on-site residential population are above the acceptable risk range of 1 x 10-6 to 1 x 10-4, due principally to the presence of CPAHs, naphthalene, and benzene in soils. The estimated noncancer hazards for the future on-site residential populations are also above the acceptable HI of 1, due primarily to naphthalene, pyrene, cobalt, benzene, and fluoranthene in soils. Further, the levels of lead in soils at the Site could result in an increase in blood lead levels above OEHHA’s benchmark value of 1 ug/dL for residential populations. Accordingly, the results of the HRA support that levels of CPAHs, naphthalene, pyrene, cobalt, benzene, fluoranthene, and lead present in soils would require some remediation or other form of risk management (e.g., institutional controls) in the event that the Site were to be developed in the future for residential purposes.
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1.0 INTRODUCTION AND OBJECTIVES Iris Environmental prepared this human health risk assessment (HRA) on behalf of Pacific Gas and Electric Company (PG&E) for the Former Lodi Manufactured Gas Plant Site (the “Site”), located at 712 South Sacramento Street in Lodi, California (Figure 1). The Site was formerly a crude oil manufactured gas plant, which was previously operated and is currently owned by PG&E. The 0.73-acre Site is currently vacant and fenced. The primary purpose of this HRA, as presented and further outlined in a memorandum submitted to the Department of Toxic Substances Control (DTSC) (Iris Environmental, 2010), is to evaluate potential risks to current and/or future populations that could be exposed to Site-related chemicals at the former Lodi MGP Site. As the Site is currently vacant and fenced, the scope of the HRA focuses primarily on evaluations associated with the potential future unrestricted use of the Site for hypothetical residential purposes. The results of the HRA will be used to identify areas of the Site where remediation, or other forms of risk management, may be appropriate, with the overall goal of long-term protection of human health and the environment. The methodology used in this HRA is consistent with risk assessment guidelines provided by the United States Environmental Protection Agency’s (USEPA) “Risk Assessment Guidance for Superfund, Volume I, Human Health Evaluation Manual (Part A), Interim Final” (USEPA, 1989a) and by the California Environmental Protection Agency (Cal/EPA), Department of Toxic Substances Control’s (DTSC) “Preliminary Endangerment Assessment Manual” (Cal/EPA, 1994). According to the USEPA (1989a), and as summarized below, there are four basic steps in the quantitative human health risk assessment process: (1) data collection and analysis, (2) exposure assessment, (3) toxicity assessment, and (4) risk characterization. These steps are summarized briefly as follows:
• Data Collection and Analysis: For this HRA, all Site environmental soil and soil gas sampling data were reviewed to identify the chemicals of potential concern (COPCs) and their representative concentrations to which populations could be exposed. The dataset for the HRA was obtained from the 2006 Surface Soil Sampling conducted by ENV America, the 2008 and 2009 Remedial Investigation (RI) conducted by Stantec Consulting Corporation (Stantec), and the 2010 Remedial Refinement Investigation also conducted by Stantec;
• Exposure Assessment: Site uses and physical features were evaluated to develop a
conceptual Site model (CSM), which identifies the pathways by which potential current and future receptors could be exposed to COPCs. The magnitude of the potential human exposures was also estimated;
• Toxicity Assessment: This phase of the risk assessment presents the relationship
between the magnitude of exposure and potential adverse effects (dose-response assessment). As a part of the toxicity assessment, toxicity values were identified from the Cal/EPA-recommended sources, and were then used to estimate the likelihood of adverse effects which could potentially occur at different exposure levels; and,
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• Risk Characterization: The exposure and toxicity assessments were combined to characterize and quantify the potential for adverse health effects as a result of potential Site-specific exposures. The risk characterization estimates the likelihood that the estimated potential exposures to COPCs at the Site will result in either cancer or other noncancer adverse health effects.
The remaining sections of this report are as follows:
• Section 2.0 provides a description of the Site features and brief summaries of the previous site investigations.
• Section 3.0 discusses the analytical data and identifies the COPCs that have been included in this HRA.
• Section 4.0 identifies the populations that may potentially be exposed to Site COPCs, the pathways by which potential exposures may occur, and the exposure assumptions used to quantify potential exposures. Section 4.0 also presents the methodology for estimating representative exposure concentrations for chemicals present in soils and air.
• Section 5.0 presents the toxicity values used in the calculation of the incremental cancer risks and noncancer hazard indices. Section 5.0 also presents the methodology for evaluating health effects associated with the lead detected in soils.
• Section 6.0 presents the methodology used to calculate the incremental cancer risks and noncancer hazard indices and summarizes the results of the HRA.
• Section 7.0 presents an overview of the remedial action goals for the Site, the methodology used to derive risk-based screening concentrations (RBSCs) or ambient-based screening concentrations (ABSCs), and a comparison of detected concentrations to RBSCs or ABSCs to identify locations, if any, where remediation or other forms of risk management (e.g., institutional controls) may be appropriate, with the overall goal of long-term protection of human health and the environment.
The references used in this report are presented in Section 8.0. There are six attachments that accompany the report. Attachment A presents all Site investigation data used in the calculations of health risks in this HRA. The determination of ambient arsenic concentrations is presented in Attachment B. Attachment C presents the outputs of the statistical evaluation for the estimation of representative exposure concentrations for chemicals present in soils. Attachment D presents the fate and transport modeling used to estimate the emissions of COPCs from the Site and the corresponding predicted air concentrations to which the various human populations may be exposed. Attachment E discusses the uncertainties inherent in the HRA. An example RBSC calculation for naphthalene is provided in Attachment F.
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2.0 SITE DESCRIPTION AND SUMMARY OF SITE INVESTIGATIONS This section provides a brief description of the features and current uses of the Site as well as brief summaries of the Site investigations conducted to date. The information in this section has been primarily obtained and summarized from the RI Report (Stantec, 2010) and from Feasibility Study/Removal Action Workplan (FS/RAW) to which this HRA is an appendix. 2.1 Site Description The 0.73 acre Site is located at 712 South Sacrament Street in Lodi, California. A Site location map is provided in Figure 1. The Site is bounded on the west by South Sacramento Street and on the east by Union Pacific Railroad tracks. Immediately north of the Site is Jorge’s Auto Body, an auto-body repair shop. Immediately south of the Site is a vacant lot owned by Lodi Iron Works (LIW). Immediately across South Sacramento Street to the west is single-family residential housing. Currently the Site is vacant and fenced, and the majority of the surface at the Site is unpaved. The Site is situated on relatively flat terrain and the general topographic grade in the vicinity of the Site is to the west-southwest. The soils beneath the Site are classified as Tokay fine sandy loam. This soil is well-drained and does not meet the hydrologic requirements of a hydric soil. The soil type is within Hydrologic Group B, indicating that it has moderate infiltration rates and moderately coarse texture. The City of Lodi is part of the Eastern San Joaquin Groundwater Basin. Lodi is underlain by alluvial soils deposited by runoff from surrounding mountain ranges. The alluvial layers are part of the major aquifer system that runs the length of the valley. The aquifer is recharged by the Mokelumne River which borders the City of Lodi to the north. Groundwater in the City of Lodi ranges from 20 feet below ground surface (bgs) in the northwest to 60 feet bgs in the south (City of Lodi, 2006). General groundwater flow within the City of Lodi is to the south (City of Lodi Water Pollution Control Facility, 2006). The Site is located within the Lodi groundwater investigation area. An investigation of tetrachloroethene (PCE)-impacted and trichloroethene (TCE)-impacted soil and groundwater has been ongoing throughout northeast and central Lodi since 1989, when the contaminants were first detected in city water supply wells. These contaminants were released from facilities approximately 3,000 feet north-northwest of the Site. The Site is located within the southern distal end of the PCE plume, approximately 600 feet southwest of Lodi well MW-24A and approximately 1,000 feet north-northwest of Lodi well MW-21A. Hydrogeologic information for the area and the Site is based on the document entitled, “Report of Third Quarter 2007 Groundwater Monitoring, Central Plume Area, Lodi, California,” (Third Quarter 2007 Report) provided by the California Regional Water Quality Control Board (RWQCB) for the Lodi Central Plume Area (Treadwell and Rollo, 2008). Based on the data provided in the report, the upper groundwater zone in the general area of the Site is approximately 60 ft-bgs with groundwater flow to the south with a gradient of approximately 0.003 feet per feet.
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2.2 Summary of Site Investigations Site investigations were conducted at the Site and off-site between mid-1980’s and 2009, and are described in more detail in the RI Report (Stantec, 2010). As discussed in the RI Report, previous site investigations included the following:
• Mid-1980s: One surface soil sample was collected at the Site by PG&E in the mid-1980s. The location of this historical sample is unknown. The results of the soil sample indicated the presence of polycyclic aromatic hydrocarbons (PAHs) at a concentration of 34 milligrams per kilogram (mg/kg), arsenic at 2.2 mg/kg, lead at 530 mg/kg, mercury at 0.21 mg/kg, and cyanide at 1.5 mg/kg. No additional investigation was conducted based on this soil sample.
• 2006: In February 2006, nine surface soil samples (SS-1 through SS-9) were collected by
ENV America in a relative grid pattern across the Site. Soil samples were analyzed for total petroleum hydrocarbons as gasoline (TPHg); benzene, toluene, ethylbenzene and xylenes (BTEX); TPH as diesel (TPHd); TPH as motor oil (TPHmo); California Title 22 (CAM 17) Metals; volatile organic compounds (VOCs); semi-VOCs (SVOCs [including PAHs]); polychlorinated biphenyls (PCBs); organochlorides; herbicides; and cyanide.
The Remedial Investigation (RI) was conducted at the Site in 2008 and 2009 by Stantec to characterize the levels and types of chemicals present in soils, soil gas, and groundwater for the purposes of remediation planning and implementation. The RI included the following soil, soil gas, and groundwater sampling and analysis:
• Subsurface Investigation - Phase I (October 2008): 16 direct-push soil borings were advanced to a maximum depth of 15 feet bgs. Between three and seven soil samples were collected from each soil boring. Soil samples were analyzed for TPHg, BTEX, TPHd, TPHmo, CAM 17 Metals, PAHs, and cyanide. Two soil borings (GW-1 and GW-2) were advanced to first-encountered groundwater at approximately 65 feet bgs. Grab groundwater samples were collected from these soil borings and analyzed for for TPHg, BTEX, TPHd, TPHmo, dissolved CAM 17 Metals, PAHs, and cyanide.
• Passive Soil Gas Sampling (October/November 2008): A passive soil gas survey was
conducted at the Site using passive diffusion sampling devices manufactured by Gore™ (formerly Gore-Sorber®). The sampling modules were installed at 6.5 to 8 feet bgs at 17 locations and left in place for 17 days before being retrieved and analyzed for VOCs and PAHs.
• Local Background Sampling (November 2008): Twelve local background soil samples
(locations PS-1 through PS-6 at 0 and 2 feet bgs) were collected and analyzed for CAM 17 Metals.
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• Active Soil Gas Sampling (July 2009). Soil gas sampling probes were installed at six locations, based in part on the findings of the passive soil gas survey. Soil gas samples were collected at depth intervals of 5 feet bgs and 8 feet bgs and analyzed for VOCs.
• Subsurface Investigation – Phase II (November 2009). An additional nine soil borings
were advanced at the Site, eight soil borings within and adjacent to South Sacramento Street, and 12 soil borings at the adjacent LIW property. Soil borings were advanced to depths of 12 to 15 feet, with the exception of several on-site soil borings extended to depths ranging from 27 to 70 feet bgs. Three to six soil samples were collected from each boring. Soil samples were analyzed for TPHg, BTEX, TPHd, TPHmo, CAM 17 Metals, PAHs, and cyanide. Grab groundwater samples were collected from two of the on-site soil borings and and analyzed for for TPHg, BTEX, TPHd, TPHmo, dissolved CAM 17 Metals, PAHs, and cyanide.
A final RI report was submitted to the DTSC in June 2010 and approved on June 14, 2010 (Stantec, 2010). Additional Remedial Refinement Investigation was conducted by Stantec at the Site in July and September 2010 to further characterize and delineate the levels and types of chemicals present in soils. The scope of work during the 2010 Remedial Refinement Investigation consisted of the following:
• Excavation of 11 test pits to 9 feet bgs, and advancement of 11 direct-push soil borings to a maximum depth of 25 feet bgs to investigate various historical subsurface features and to provide additional delineation of chemical impacts to soils;
• Advancement of 3 soil borings using an air knife to investigate historical gas distribution
lines entering South Sacramento Street from the northwest corner of the site; and
• Advancement of 1 direct-push soil boring to 10 feet bgs within South Sacramento Street to further delineate elevated chemical concentrations previously detected in shallow soils.
• Advancement of 4 direct-push soil borings along the northern property boundary to
investigate the extent of potential MGP-related impacts to soil;
• Advancement of 4 direct-push soil borings within South Sacramento Street to provide additional delineation of chemical impacts to soil identified during previous work; and,
• Advancement of 4 direct-push soil borings to in the vicinity of test pit TP-11 to further
delineate chemical impacts previously identified at this location. Soil samples collected during the Remedial Refinement Investigation were analyzed for TPHg, BTEX, TPHd, TPHmo, CAM 17 Metals, PAHs, total cyanide, and/or ammonia. A Site plan with soil, soil gas, and groundwater sample locations from the 2006 Surface Soil Sampling, the 2008 and 2009 RI and the 2010 Remedial Refinement Investigation is provided in Figure 2.
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2.3 Summary of Nature and Extent of Impacts On-site Soils Historical gas manufacturing operations at the Site have resulted in chemical impacts to shallow soils in portions of the Site particularly between the ground surface and 5 feet bgs. Chemical impacts are primarily associated with petroleum hydrocarbons, PAHs, and lead. A former redwood oil storage tank appears to have been abandoned in place, and impacted soils have been observed within the fill material inside the former tank and beneath the tank to a depth of approximately 21 feet bgs in the immediate vicinity of the former tank. The vertical extent of chemical impacts have been delineated, and underlying soils to a depth of 65 feet bgs were observed to be unimpacted, indicating no potential threat to groundwater. A former oil conveyance pipeline may still be in place at the Site. Investigation of this feature has identified chemical impacts to depths ranging from 5 to 12 feet bgs. Two above-ground former MGP waste receptacles (identified on drawings as ‘former lampblack separators’) were historically located in the southeast quadrant of the Site. Investigation of this area has revealed the presence of approximately 1.5 feet of concrete underlain by native soils. Lampblack was identified between 5 and 5.5 feet bgs in one of three soil borings (SB-8) advanced beneath the former separator, and elevated concentrations of petroleum hydrocarbons and PAHs have been identified to 6.5 feet bgs. Former gas storage holder #3 was historically located in the southwest quadrant of the Site. The footprint of the holder extended beyond the current property boundary into South Sacramento Street, across the parcel of land sold to the City of Lodi for the purpose of street widening. Investigation of the historical gas storage holder #3 has revealed the presence approximately 3 feet of concrete, underlain by native soils impacted by lampblack and elevated PAHs to depths of 4 feet bgs. Historical investigations have identified several areas where chemical impacts to soil extend beyond the upper 5 feet bgs:
• Test Pit TP-2: Test pit TP-2, advanced near the northern property line, identified elevated concentrations of PAHs to 6 feet bgs. Based on data from surrounding soil borings, the extent of chemical impact at TP-2 appears to be limited in extent.
• Test Pit TP-11: Test pit TP-11, advanced west of the former lampblack separators,
identified elevated concentrations of PAHs to 9 feet bgs. Based on data from additional soil borings advanced in this area, the extent of chemical impact at TP-11 appears to be limited in extent.
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• Southern Property Boundary: An area along the southern property boundary contains elevated PAHs to a depth of approximately 6 feet bgs
• Eastern Property Boundary: An area along the eastern property boundary, in the vicinity
of the former oil conveyance pipe, contains elevated PAHs, petroleum hydrocarbons, and lead to a depth of approximately 6 feet bgs.
Off-site Soils Investigation of soils beneath South Sacramento Street has identified chemical impacts to soils consistent with historical MGP operations. In general, shallow soils within the area of the street historically part of the Site (roughly to the current centerline of South Sacramento Street) contain shallow chemical impacts from elevated PAHs, petroleum hydrocarbons and lead, consistent with shallow soil conditions elsewhere on the Site. Deeper impacts (to 6 feet bgs) have been identified at locations in the center of the street, adjacent to the historical gas holders. Previous investigations identified two historical gas distribution pipelines leaving the Site from the former general shop and store room (see Figure 2). These conduits are severed approximately 15 feet into the Street, and underlying soils have not been impacted. Chemical impacts consistent with MGP waste products (i.e., elevated concentrations of petroleum hydrocarbons found with elevated concentrations of PAHs) have been identified in shallow soils on the LIW property to the south. In general, these concentrations are present in surface soils, attenuate to below screening levels between the ground surface and 3 feet bgs, and are present within 15 feet of the fence line. Soil Gas Soil gas conditions beneath the Site have been characterized using passive and active soil gas sampling methods. The passive soil gas survey revealed relatively elevated mass of TPH, BTEX, naphthalene, and combined PAHs at SB-14, located along the southern edge of the Site. Relatively elevated mass of TPH and BTEX were also reported from SB-2, advanced adjacent to the former purifiers in the northern third of the Site. Based on results of the passive soil gas survey data, semi-permanent soil gas sampling points were installed at six locations. Soil gas sampling locations SG-2 and SG-6 corresponded to the highest reported concentrations of VOCs and/or naphthalene reported during the passive soil gas survey (SB-2 and SB-14, respectively). The highest concentrations of BTEX constituents in soil gas were reported in shallow and deep samples from SG-2 and SG-6. Detected concentrations of VOCs including naphthalene were, in general, low. However, note that the laboratory reporting limits for naphthalene in five samples (SG-2S, SG-2D, SG-4D, SG-6S, and SG-6D) considerably elevated (i.e., 6- to 29-times higher than the lowest laboratory reporting limit for naphthalene).
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Groundwater Low concentrations of petroleum hydrocarbons consistent with a weathered fuel product were detected in groundwater beneath the Site. Based on the chemical composition of constituents in groundwater, the significant vertical separation between impacted soils and first-encountered groundwater (greater than 40 feet), and the low migration potential of MGP-related constituents, these detections appear to be unrelated to historical site operations and warrant no further investigation. Groundwater sampling in the vicinity of the former MGP water supply wells confirms the wells did not act as pathways for migration of contaminants to groundwater.
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3.0 DATA EVALUATION AND SELECTION OF CHEMICALS OF POTENTIAL CONCERN
This section discusses the analytic data collected during the site investigations and the COPCs selected for inclusion in the HRA. 3.1 Data Evaluation All data collected on-site and off-site during previous Site investigations, as discussed in Section 2.0, were evaluated for use in the HRA. All soil and soil gas data collected during the 2006 Surface Soil Sampling, the 2008 and 2009 RI, and the 2010 Remedial Refinement Investigation were evaluated for inclusion in the HRA. For purposes of remedial decision-making, the boundary of ‘Site’ will include:
• street to the west of the Site (South Sacramento Street), and • 30-foot strip on LIW property directly south of Site.
As such, all data collected off-site in South Sacramento Street and on LIW property are included in the dataset used in the quantitative HRA. As concluded in the RI Report (Stantec, 2010) and mentioned previously in Section 2.3, the low concentrations of petroleum hydrocarbons and related constituents detected in groundwater appear to be unrelated to historical site operations. Therefore, groundwater data collected during the RI was not evaluated in the HRA. All Site investigation data used in the HRA are compiled and presented in Attachment A. 3.2 Selection of Chemicals of Potential Concern The selection of COPCs for the quantitative HRA was based on guidance provided by USEPA (1989a) and Cal/EPA (1997). In general, all chemicals detected in the soil and soil gas samples were initially included in the quantitative HRA. Cal/EPA guidance calls for the exclusion of inorganic chemicals from the quantitative risk assessment if they are detected at levels within the local background/ambient concentrations. As previously mentioned in Section 2.0, twelve local background soil samples (samples collected from sample locations PS-1 through PS-6 at 0 and 2 feet bgs) were collected and analyzed for CAM17 Metals during the RI. The specific approach used to assess whether the metals are present within ambient levels was conservative and intentionally erred on the side of including chemicals in the quantitative analysis. Specifically, if the maximum detected concentration and the 95% upper confidence limit (UCL) of the arithmetic mean concentration detected in the on-site samples were above the respective maximum detected concentration and 95% UCL of the local background samples, then the inorganic compound was included in the quantitative risk assessment. This conservative screening approach was used for all metals with the exception of
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arsenic. Using DTSC’s approach for establishing an ambient level for arsenic, arsenic concentrations at the Site were determined to be representative of ambient levels; arsenic was therefore excluded from analysis in the HRA. The analysis of Site arsenic concentrations and the determination of ambient arsenic concentrations are provided in Attachment B. Similarly, concentrations of carcinogenic polycyclic aromatic hydrocarbons (CPAHs) at the Site were compared to ambient levels. As CPAHs are virtually ubiquitous in surface soils, a comparison to ambient concentrations is one method useful in the determination of whether there are significant concentrations of CPAHs at a site compared to ambient concentrations. A dataset of ambient concentrations for CPAHs developed for the northern California area was used in this HRA for comparison. The dataset was compiled from previous site investigations in northern California conducted with the oversight of DTSC by PG&E and the United States Navy. The dataset was developed in cooperation and collaboration with a task group of representatives from the Human and Ecological Risk Division (HERD) 1 and Site Mitigation branches of DTSC, Cal/EPA. The team of consulting firms involved in the development of the database were ENVIRON, Entrix, Iris Environmental, and ENV America. The final dataset consists of eighty-six data points from twenty-one different sites. The details of this study are presented in a report that was submitted to HERD on June 7, 2002 (ENVIRON et al., 2002). DTSC has issued an Advisory (Cal/EPA, 2009a) that supports the use of the PAH background dataset as a tool for assessing PAH impacts and making remediation decisions for PAHs at sites. The arithmetic mean and the 95% UCL of the mean of the background CPAH dataset, in benzo(a)pyrene (B[a]P) equivalents, are 0.21 mg/kg and 0.40 mg/kg, respectively. Calculated B(a)P equivalent values in the background dataset range from non-detect (ND, <0.0027 milligrams per kilogram [mg/kg]) to 2.813 mg/kg. As indicated in Tables 1 and 2, the 95% upper confidence levels (UCLs) for B(a)P equivalents in on-site soils are above the 95% UCL of the background dataset of 0.40 mg/kg, and therefore CPAHs were retained as a COPC for these soil datasets and included in the quantitative HRA. Chemicals detected in soils and soil gas that are included in the quantitative HRA are summarized below:
• Soils (Tables 1 and 2): The COPCs detected in soils that are included in the quantitative HRA are as follows: various VOCs (including benzene, toluene, ethylbenzene, and xylenes [BTEX]); TPH (gasoline, diesel, and motor oil ranges); various PAHs, and various inorganics;
• Soil Gas (Table 3): The COPCs detected in soil gas that are included in the quantitative HRA are as follows: 1,1-difluoroethane, 1,2,4-trimethylbenzene, 1,3,5-trimethylbenzene, 2-butanone (MEK), 2-hexanone, 4-ethyltoluene, acetone, benzene, carbon disulfide, isopropylbenzene (cumene), ethanol, dichlorodifluoromethane (Freon 12), ethylbenzene, heptane, methyl tert-butyl ether (MTBE), naphthalene, propylbenzene, styrene,
1 The Human and Ecological Risk Division has been renamed and is currently referred to as the Office of Human and Ecological Risk (HERO).
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tetrachloroethene, toluene, trichlorofluoromethane (Freon 11), trichloroethene, and total xylenes.
According to the existing DTSC risk assessment guidance (Cal/EPA, 1994), risks to human health associated with the presence of TPH are assessed by evaluating the significance of individual chemical constituents within the TPH mixture (e.g., BTEX and PAHs). The DTSC had released a TPH Interim Guidance which describes an approach for evaluating TPH as a mixture in a risk assessment (Cal/EPA, 2009b). However, as of mid-June 2010, the TPH Interim Guidance is no longer available on DTSC’s web-site, and the web-site specifically states: “This guidance document is no longer active. Future approaches to petroleum hydrocarbon contamination will be part of the revised PEA [Preliminary Endangerment Assessment] Guidance Manual.” It is our understanding that moving forward, DTSC’s revised PEA Manual will allow health risks associated with weathered TPH, such as those associated with former MGP sites, to be quantified by relying on the estimated risks for the individual chemical constituents in TPH, as originally recommended in DTSC’s 1994 PEA Manual (Cal/EPA 1994). Based on conversations with representatives from DTSC’s Human and Ecological Risk Office (HERO), we understand that one of the reasons for removing the Interim Guidance is that it may not be a useful tool in remedial decision making for weathered petroleum releases. One example is that many of the toxicity values for TPH recommended in the Interim Guidance are based on fresh petroleum product streams and/or mixtures; such studies may not be representative or relevant for evaluating the toxicity of weathered petroleum releases, such as those associated with MGP operations. As the TPH associated with residues potentially associated with MGP operations are weathered, an appropriate method for evaluating health risks associated with the TPH is to rely on the specific individual constituents measured in the samples. Therefore, this HRA evaluates the toxicity of TPH by evaluating the individual compounds that are likely to be associated with the TPH (e.g., BTEX and PAHs). We note that there are other approaches for evaluating health risks associated with TPH (i.e., TPH Criteria Working Group and Massachusetts Department of Health approaches). The limitations/uncertainties associated with the various approaches for evaluating weathered TPH will be discussed in the Uncertainties in the Risk Assessment (Attachment E).
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4.0 EXPOSURE ASSESSMENT To determine whether the levels of chemicals present in soils and soil gas at the Site would pose a risk to human populations, it is necessary to identify the populations that may potentially be exposed to the chemicals present in soils and soil gas and determine the pathways by which the exposures may occur. Identification of the potentially exposed populations requires an evaluation of the potential current and future land use(s) of the Site. Once the potentially exposed populations are identified, the complete exposure pathways by which the individuals may contact chemicals present in soils and soil gas must be determined. A Conceptual Site Model (CSM) is used (Figure 3) to show the relationship between the chemical sources, exposure pathways and potential receptors at the Site. These source-pathway-receptor relationships provide the basis for the quantitative exposure assessment. Only those complete source-pathway-receptor relationships are included in the HRA. The following section presents a discussion of the chemical sources and potential transport mechanisms, identifies potentially exposed populations and complete and incomplete exposure pathways, discusses the human intake assumptions used in the HRA, and summarizes the methodology for estimating representative exposure concentrations. 4.1 Chemical Sources and Potential Release Mechanisms On-site activities associated with the historical operations of the former MGP have likely resulted in the release of chemicals to the soils. These releases are indicated by the detection of certain chemicals, particularly PAHs, in the soils during the Site investigation activities. Once the chemicals associated with the former MGP operations are released into the surface and subsurface soils, the potential secondary release mechanisms include the following:
• volatilization of constituents in soils into ambient (i.e., outdoor) or indoor air; • wind erosion and atmospheric dispersion of particulate-bound constituents; • migration of constituents from the subsurface soils down into the groundwater; • off-site transport of chemicals in soils through surface water runoff.
The mechanisms listed above represent the theoretically complete mechanisms through which chemicals at the Site can be released and transported from one environmental medium to another. A discussion of each of these transport mechanisms and resulting human exposure routes, including those that are considered to be incomplete, is incorporated into the subsequent sections. 4.2 Identification of Potentially Exposed Populations As described above, the goal for the Site is to ensure that chemicals present at the Site would not pose an unacceptable risk to the health of current or future populations. Accordingly, the
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primary focus of the HRA is on those exposure pathways that would be considered complete for the current and future land-use scenarios. Under current conditions, the Site is vacant. Access to the Site is controlled by fencing topped with barbed wire. The Site is bounded on the west by South Sacramento Street and on the east by Union Pacific Railroad tracks. Immediately north of the Site is Jorge’s Auto Body, an auto-body repair shop. Immediately south of the Site is a vacant lot owned by Lodi Iron Works. Immediately across South Sacramento Street to the west is single-family residential housing. The Site is surrounded by off-site commercial and residential land-uses. Further, the Site itself may, in the future, be redeveloped for residential uses. Based on the current and potential future uses of the Site and the surrounding area, the populations that will be included in the health risk assessment are current off-site residential and commercial populations (living or working adjacent to the property) and future on-site residential populations. 4.3 Exposure Pathways The following section identifies the potentially complete exposure pathways through which current and future populations could be exposed to COPCs detected in soils and soil gas. The section also provides the rationale for excluding certain exposure pathways from further consideration. All exposure pathways included in the HRA are identified in Figure 3, the CSM for the Site. 4.3.1 Complete Exposure Pathways As previously indicated, complete exposure pathways require chemical sources, migration routes, an exposure point for contact, and human exposure routes. The Site is currently vacant and fenced, and the majority of the surface of the Site is unpaved. As indicated on Figure 3, and based on our review of available Site data and the current Site use and conditions, the complete pathways through which current off-site residents and commercial workers may be exposed to chemicals detected in soils and soil gas at the Site include the following: Current Off-site Resident and Commercial Worker
• Inhalation of volatiles migrating from soils and soil gas up through the soil column, and into outdoor ambient air; and
• Inhalation of particulates from exposed soils. In the future, it is possible that the Site could be redeveloped and direct exposure to the COPCs in the surface and subsurface soils could occur. As indicated on Figure 3, the complete pathways through which future hypothetical on-site residential populations may be exposed to chemicals detected at the Site include the following:
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Future On-site Resident • Inhalation of volatiles migrating from soils and soil gas up through the soil column, and
into indoor and outdoor ambient air; • Inhalation of particulates; • Soil ingestion; and • Dermal contact with soils.
4.3.2 Incomplete Exposure Pathways Exposure pathways considered incomplete were not included in the risk evaluation. Exposure pathways considered incomplete are discussed below:
• Exposures related to the surface water runoff pathway: The Site is essentially flat and, as mentioned previously, mostly unpaved. Swales are in place over sections of the Site, but are in poor shape. Most precipitation will likely percolate into the soils, minimizing the potential for surface runoff. Thus, the surface water runoff pathway is considered incomplete under current conditions and is not evaluated in the HRA.
• Exposures related to the migration of constituents from the subsurface soils down into the
groundwater: Groundwater is not currently used at the Site as a potable drinking water source. As concluded in the RI report (Stantec, 2010), the low concentrations of petroleum hydrocarbons and related constituents detected in groundwater appear to be unrelated to historical site operations. Therefore, groundwater data collected during the RI was not evaluated in the HRA. Although migration of constituents from the subsurface soils down into the groundwater is currently considered incomplete based on existing Site data, the potential future migration of constituents from the subsurface soils down into the groundwater will be address in the FS/RAW.
4.4 Human Intake Assumptions The route-specific assumptions used to estimate exposure to the chemicals in the soils and soil gas at the Site are presented in Table 4. Exposure assumptions are taken from DTSC and USEPA guidance documents, wherever possible, and are cited in Table 4. As described in subsequent sections, the various exposure assumptions are combined to estimate the intake of a chemical through a given route of exposure (e.g., soil ingestion). The route-specific intakes are then combined in order to calculate the total intake, with all exposure pathways combined. The route-specific equations used to calculate chemical intake are presented in Tables 5 and 6, for the residential and commercial worker scenarios, respectively. 4.5 Estimation of Representative Exposure Concentrations The following section presents the methods used to estimate the representative concentration of the COPCs in the soils and air to which current and future populations could be exposed.
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4.5.1 Estimation of COPC Concentrations in Soil As discussed by the USEPA (2002a), an estimate of the risk associated with a given exposure is based on an estimate of the average concentration from the sampling results. Typically, the 95% UCL of the arithmetic mean is used due to the uncertainty associated with estimating the true average concentration at a Site. An estimate of the average concentration is used because: 1) carcinogenic and chronic noncarcinogenic toxicity criteria are based on lifetime average exposures; and 2) the average concentration is most representative of the concentration that would be contacted over an extended exposure period (USEPA, 2002a) (i.e., exposure point concentration [EPC]). The 95% UCL values for each chemical were calculated using USEPA guidance (listed below) and the USEPA statistical program, ProUCL. Data for each chemical were analyzed to determine the distribution pattern (e.g., normal, lognormal, or gamma); printouts of ProUCL distribution analysis are included in Attachment C. As most chemical datasets did not fit a normal, lognormal, or gamma distribution pattern, nonparametric methods were used to calculate the 95% UCL. In instances where the 95% UCL is greater than the maximum detected concentration, the dataset was evaluated to determine whether the distribution of the dataset is highly skewed by an outlier, and either maximum detected concentration or more reasonable estimate of the average concentration was selected in place of the 95% UCL as the representative EPC. In accordance with USEPA guidance (USEPA, 2010a), 95% UCLs were not calculated for datasets with less than five detections or less than eight samples. Although the USEPA guidance (USEPA, 2010a) recommends either the use of the mean or the median when there are insufficient detections or number of samples in the dataset, the maximum detected concentration was conservatively used as the representative EPC in these cases in this HRA. The following documents were used for guidance in statistical analysis:
• U.S. Environmental Protection Agency (USEPA). 2002a. Calculating Upper Confidence Limits for Exposure Point Concentrations at Hazardous Waste Sites. Office of Emergency and Remedial Response. Washington, D.C. OSWER 9285.6-10. December.
• U.S. Environmental Protection Agency (USEPA). 2010b. ProUCL User Guide. Office of Research and Development. Washington, D.C. EPA/600/R-07/038. May.
The datasets used in estimating exposures to chemicals present in soils at the Site are summarized below: 4.5.1.1 Current Off-site Residents and Commercial Workers The Site is currently mostly unpaved. However, as the Site is unoccupied and enclosed by fencing topped with barbed wire, there is no current direct contact (i.e., soil ingestion or dermal contact) with soils at the Site. However, for current off-site residents and commercial workers, potential exposures associated with the inhalation of particulates in outdoor air from the exposed soils were assessed in this HRA, and are based on exposure to COPCs found within the upper 0.5
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feet of exposed soils. The upper 0.5 feet of exposed soil is assumed to be representative of surface soils that have the potential for wind erosion and dispersion. 95% UCLs computed for COPCs from the exposed soils (0-0.5 feet bgs) dataset were used to assess the inhalation of particulates for current off-site residents and commercial workers. Soil samples collected within the adjacent street west of the Site (i.e. South Sacramento Street) are under either asphalt or concrete pavement and therefore, excluded from the exposed soil area dataset. Although there are some areas of the Site and LIW property that are paved, all 0 and 0.5 feet bgs soil samples collected within the Site and LIW property were considered uncovered and included in the exposed soil area dataset. Summary statistics for this dataset are provided in Table 1. The concentrations of chemicals in exposed soils that were used as the representative EPC for evaluating particulate inhalation exposures to current off-site residents and commercial workers are presented in Table 7.
4.5.1.2 Future On-site Residents Under a future residential scenario, the subsurface soils down to 10 feet bgs could potentially be brought up and mixed with surface soils as a result of Site development. Future on-site residents are therefore assumed to be directly exposed to COPCs detected across the Site down to a depth of 10 feet bgs. 95% UCLs computed for COPCs from the soils (0-10 feet bgs) dataset were used to assess exposures to the future on-site residents. Summary statistics for this dataset are presented in Table 2. The concentrations of chemicals in soils that were used as the representative EPC for evaluating potential exposures to future on-site residents are presented in Table 8. 4.5.2 Estimation of Air Concentrations Resulting from Emissions from Soil 4.5.2.1 Volatile Organic Compounds Indoor Air Volatile compounds have the potential to volatilize from soils into soil gas, and migrate up through the soil column and into the indoor air space of an overlying building. This process is referred to as “vapor intrusion.” Future building occupants on-site could then be exposed via inhalation to these volatile compounds present in indoor air. The COPCs considered to be volatile are those COPCs that have a Henry’s Law constant greater than 10-5 (atm-m3/mol) and a vapor pressure greater than 10-3 mm Hg (Cal/EPA, 1994). Physicochemical properties of the COPCs in soils and soil gas are presented in Table 9. In general, soil gas data, rather than soil data, are preferred for use in transport modeling of volatile chemicals to indoor air, because soil gas data represent a direct measurement of the gas-phase constituents that may migrate to indoor air. Thus, soil gas data was used to evaluate the vapor intrusion pathway. The chemicals detected in soil gas at the Site include 1,1-difluoroethane, 1,2,4-trimethylbenzene, 1,3,5-trimethylbenzene, 2-butanone (MEK), 2-hexanone,
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4-ethyltoluene, acetone, benzene, carbon disulfide, isopropylbenzene (cumene), ethanol, dichlorodifluoromethane (Freon 12), ethylbenzene, heptane, methyl tert-butyl ether (MTBE), naphthalene, propylbenzene, styrene, tetrachloroethene, toluene, trichlorofluoromethane (Freon 11), trichloroethene, and total xylenes. As previously mentioned, soil gas data were collected from 6 locations (i.e. SG-1 through SG-6) across the Site at two depths (i.e. 5 feet bgs and 8 feet bgs) to evaluate the significance of the vapor intrusion pathway. There are currently no on-site buildings, and the site is unoccupied thus there the vapor intrusion pathway is considered incomplete under current site conditions. However, under the hypothetical future residential land use scenario, residential buildings could be built anywhere on-site. As described in detail in Attachment D, potential vapor intrusion into future on-site buildings is modeled with the USEPA-recommended Johnson & Ettinger Model for soil gas (SG-SCREEN Version 2.0), as modified by the Cal/EPA DTSC HERD (USEPA, 2004a; Cal/EPA, 2009c). The vapor intrusion modeling is conducted using the soil gas data collected at all locations throughout the Site. In summary, the vapor intrusion pathway is evaluated for hypothetical future on-site residents. The details of the fate and transport modeling used to estimate concentrations of volatile chemicals in indoor air are presented in Attachment D. The results of the transport modeling are presented in Table 23 for future on-site residential populations; this table presents the modeled chemical concentrations in indoor air associated with each measured chemical concentration in soil gas. The results of the soil gas evaluation are discussed in further detail in Section 6.0, Risk Characterization. Ambient Air
The CSM (Figure 3) assumes that all receptor populations included in the HRA could be exposed to volatile chemicals present in outdoor air as a result of transport from either soils or groundwater. Exposure to volatile constituents present in outdoor air could occur via the inhalation pathway. In general, soil gas data, rather than soil or groundwater data, are preferred for use in transport modeling of volatile chemicals to outdoor air, because soil gas data represent a direct measurement of the gas-phase constituents that may migrate to outdoor air. Thus, soil gas data were used to evaluate the outdoor air pathway.
As discussed in Attachment D, transport from soil gas to outdoor air is modeled by assuming steady-state emissions in accordance with ASTM guidance (ASTM, 1995) and a dispersion factor estimated in accordance with the USEPA Soil Screening Guidance (USEPA, 1996; 2002b). This transport process is characterized by the “transfer factor” (TF), which is defined as the volatile chemical concentration in on-site outdoor air (CA) divided by the volatile chemical concentration in soil gas (CSG). Thus, the concentration of a volatile-phase chemical in outdoor air may be expressed as a function of the chemical concentration in soil gas and the TF:
( ) ( ) TFmg/mCSG mg/mCA 33 ×=
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Chemical- and depth-specific TFs are developed as described in Attachment D, and are applied to the results of soil gas sampling at locations SG-1 through SG-6. The results of this transport modeling from soil gas to outdoor air are presented in Tables 21 and 22 for residents and commercial workers, respectively; these tables present the modeled chemical concentration in on-site outdoor air associated with each measured chemical concentration in soil gas.
The CSM assumes that, under the current land use scenario, volatile chemicals emitted from soil gas to on-site outdoor air are further transported via advection (i.e., wind) to off-site residential and commercial land uses, where off-site residential and commercial receptors are exposed via inhalation. It is conservatively assumed that these off-site residential and commercial receptors are exposed to volatile chemicals at their estimated concentrations in on-site outdoor air. In actuality, the concentrations of volatile chemicals in outdoor air would likely be lower at off-site locations than on-site, due to dispersion. 4.5.2.2 Nonvolatile Chemicals
The CSM assumes that all receptor populations included in the health risk assessment could be exposed to particulate-phase chemicals present in outdoor air as a result of transport from Site soils (i.e., chemicals adhered to airborne dust particles). In general, the concentration of a particulate-phase chemical in air (CA) is the product of the concentration of dust in air (CD) and the concentration of the chemical in soils (CS):
Thus, for a given concentration of a chemical in soils (CS), a determination of the concentration of that chemical in air (CA) requires a determination of the dust concentration in air (CD). In the context of modeling chemical transport from soils to outdoor air, the concentration of dust in air is expressed through the particulate emission factor (PEF). As defined by the USEPA Soil Screening Guidance (USEPA, 1996: 2002b), the PEF has units of cubic meters of air per kilogram of dust (m3/kg), and is therefore equal to the reciprocal of the dust concentration:
( ) ( ) ( )mg/kg 10mg/m CD1/kgm PEF 6
33 +×=
Combining the preceding two equations, the concentration of a particulate-phase chemical in outdoor air may be expressed as a function of the chemical concentration in soils and the particulate emission factor (PEF):
( ) ( )( )/kgmPEFmg/kg CSmg/mCA 3
3 =
The chemical concentration in soils (CS) used to estimate the chemical concentration in air (CA) for a particular receptor is the EPC in soils for that receptor.
( ) ( ) ( ) ( )kg/mg 01mg/kg CSmg/m CDmg/mCA 633 −××=
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For residential and commercial receptor populations, the dust concentration in air is assumed to be attributable to wind erosion. Wind erosion is modeled in accordance with the PEF methodology presented in the USEPA Soil Screening Guidance (USEPA, 1996: 2002b). The details of this calculation are described in Attachment D. Calculated PEFs and particulate-phase chemical concentrations in outdoor air are presented in Table 7 for current off-site residents and commercial workers and Table 8 for future on-site residents.
Similar to the approach for exposure to VOCs in outdoor air, it is conservatively assumed that off-site commercial and residential receptors are exposed to chemicals in particulate-phase at their estimated concentrations in on-site outdoor air. In actuality, the concentrations of particulate-phase chemicals in outdoor air would likely be lower at off-site locations than on-site, due to dispersion.
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5.0 TOXICITY ASSESSMENT The toxicity assessment characterizes the relationship between the magnitude of exposure to a chemical and the potential for adverse health effects. More specifically, the toxicity assessment identifies or derives toxicity values that can be used to estimate the likelihood of adverse health effects occurring in humans at different exposure levels. Consistent with regulatory risk assessment policy, adverse health effects resulting from chemical exposures are evaluated in two categories: carcinogenic effects and noncarcinogenic effects. The hierarchy of sources for the toxicity criteria used for this HRA corresponds to the State's guidelines (Cal/EPA, 1994). All toxicity values used in the HRA are presented in Table 10. For evaluating lead exposures, the traditional RfD approach is not applied, because most human health effects data are based on blood lead concentrations, rather than external dose (Cal/EPA, 1993). 5.1 Toxicity Assessment for Carcinogenic Effects Current health risk assessment practice for carcinogens is based on the assumption that, for most substances, there is no threshold dose below which carcinogenic effects do not occur. This current “no-threshold” assumption for carcinogenic effects is based on an assumption that the carcinogenic processes are the same at high and low doses. This approach has generally been adopted by regulatory agencies as a conservative practice to protect public health, and the “no-threshold” assumption has been used in the agency-derived cancer slope factors (CSFs) and Unit Risk Factors (URFs) used in this HRA. Although the magnitude of the risk declines with decreasing exposure, the risk is believed to be zero only at zero exposure. The toxicity values used to quantify the response potency of a potential carcinogen are the following:
• The CSF, used in assessing the oral route of exposure, represents the excess lifetime cancer risk due to a continuous, constant lifetime exposure to a specified level of a carcinogen generally reported as excess incremental cancer risk per milligram of chemical per kilogram body weight per day (mg/kg-day)-1.
• The URF, used to assess the inhalation route of exposure, represents the excess lifetime
cancer risk due to a continuous, constant lifetime exposure to a specified level of a carcinogen in the air, generally reported as excess incremental cancer risk per microgram of chemical per cubic meter of air (ug/m3)-1; URFs are reported as excess incremental cancer risk per milligram of chemical per cubic meter of air [(mg/m3)-1] in Table 10 for risk calculation purposes.
The Cal/EPA and USEPA have published a list of CSFs and URFs recommended for use in risk assessments. In accordance with DTSC guidance (Cal/EPA, 1994), the hierarchy of toxicity values for carcinogenic effects used in this HRA is as follows:
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1. The Cal/EPA-recommended CSFs and URFs as maintained on the Cal/EPA Office of Environmental Health Hazard Assessment’s (OEHHA) on-line toxicity criteria database (Cal/EPA, 2011).
2. The National Center of Environmental Assessment (NCEA)/Superfund Health Risk
Technical Support Center (STSC)-recommended provisional peer reviewed toxicity values (PPRTVs; as cited in USEPA, 2010c or USEPA 2004b).
Table 10 presents the CSFs and URFs used in this HRA. As indicated, chemicals detected in soils and/or soil gas at the Site that are currently regulated as carcinogens include benzene, ethylbenzene, MTBE, 1-methylnaphthalene, naphthalene, tetrachloroethene, trichloroethene, benzo(a)pyrene equivalents, beryllium, cadmium, cobalt, and nickel. 5.2 Toxicity Assessment for Noncarcinogenic Effects The toxicity assessment for noncarcinogenic effects requires the estimation of an exposure level below which no adverse health effects in humans are expected to occur. USEPA refers to these levels as reference doses (RfDs) for oral exposures and reference concentrations (RfCs) for inhalation exposures (USEPA, 1989a). The noncancer RfD represents a dose, given in milligrams of chemical per kilogram of body weight per day (mg/kg/day), that would not be expected to cause adverse noncancer health effects in potentially exposed populations. The noncancer RfD is often referred to as the “acceptable dose.” The noncancer RfC represents the airborne concentration (in units of milligrams per cubic meter [mg/m3]) that would not be expected to cause adverse noncancer health effects in populations exposed through the inhalation pathway. OEHHA refers to these “acceptable air concentrations” as Reference Exposure Levels (RELs). As the inhalation RfCs/RELs are derived from inhalation toxicity studies, they are used for evaluating inhalation exposures (USEPA, 1989a). Noncancer toxicity values used (i.e., RfDs and RfCs) correspond to those listed and recommended by Cal/EPA and USEPA. Consistent with DTSC HERO’s approach (Cal/EPA, 2009c), the more conservative RfD/REL and RfC/REL obtained from either OEHHA’s list of chronic RELs (Cal/EPA, 2011) or USEPA’s sources listed below are used in this HRA (e.g., RfC for naphthalene). As recommended by USEPA (USEPA, 2003a), the hierarchy of USEPA toxicity values for noncancinogenic effects for the oral and inhalation exposures (i.e., RfDs and RfCs, respectively) used in this HRA is as follows:
1. The USEPA-recommended RfDs as maintained on the USEPA’s IRIS on-line database (USEPA, 2011);
2. The NCEA/STSC-recommended PPRTVs (as cited in USEPA, 2010c or USEPA
2004b); and
3. Other USEPA-recommended values (i.e., HEAST toxicity values; USEPA, 1997).
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All noncarcinogenic toxicity values used in this risk assessment for chemicals detected in soils and/or soil gas at the Site are presented in Table 10. 5.3 Toxicity Assessment for Lead The traditional RfD approach to the evaluation of chemicals is not applied to lead because most human health effects data are based on blood lead concentrations, rather than external dose (Cal/EPA, 1993). Blood lead concentration is an integrated measure of internal dose, reflecting total exposure from Site-related and background sources. A clear “no observed effects level” (NOEL) has not been established for such lead-related health effects endpoints such as birth weight, gestation period, heme synthesis and neurobehavioral development in children and fetuses, and blood pressure in middle-aged men. The California Office of Environmental Health Hazard Assessment (OEHHA) has developed a 1 µg/dL benchmark for source-specific incremental change in blood lead levels for protection of school children and fetuses (OEHHA, 2007). The DTSC has developed a methodology for evaluating exposure and the potential for adverse health effects resulting from exposure to lead in the environment (Cal/EPA, 1993). The methodology presents an algorithm for estimating blood lead concentrations in children and adults based on a multi-pathway analysis. DTSC has provided a spreadsheet (LeadSpread) based on its guidance for evaluating lead toxicity (Cal/EPA, 1993). The USEPA has developed a methodology for evaluating exposure and the potential for adverse health effects resulting from nonresidential exposure to lead in the environment, in Recommendations of the Technical Review Workgroup for Lead for an Approach to Assessing Risks Associated with Adult Exposures to Lead in Soil (TRW ALM; USEPA, 2003b). The methodology results in a blood lead concentration of concern for the protection of fetal health (in women of child-bearing age) and presents an algorithm for predicting quasi-steady state blood lead concentrations among adults who have relatively steady patterns of site exposure. The DTSC’s LeadSpread Model was used in this HRA to estimate the incremental increase in blood lead (PbB) in the child exposed to lead in soil (i.e., the blood lead concentration at the 90th percentile using LeadSpread) under the current off-site and future on-site residential scenario. The incremental increase in blood lead for both receptors will be compared to OEHHA’s recommended benchmark change in blood lead concentration of 1 µg/dL (OEHHA, 2007). As the USEPA’s ALM only considers the soil ingestion pathway, health risks associated with lead in on-site soils for the current off-site commercial worker will be assessed relative to health risks estimated for the current off-site resident as health risks from exposure to lead in on-site soils for the current off-site commercial worker will be lower than that for the current off-site resident given the lower exposure frequency (i.e. 5 days per week for the commercial worker versus 7 days per week for the resident). The results of the lead evaluation for the Site for current off-site residents and commercial worker and future on-site residents are discussed in Section 6.0 (Risk Characterization).
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6.0 RISK CHARACTERIZATION This section of the HRA presents the quantitative characterization of risks posed by the COPCs identified in soils and soil gas, and the uncertainties associated with the projected risks. This section is divided into three parts. The first part discusses the methodology used in calculating potential health risks to exposed populations posed by the presence of chemicals in the soils and soil gas. The second part presents the estimated cumulative potential incremental cancer risk and noncancer hazard posed by the presence of COPCs in soils and soil gas. The quantitative estimates of incremental cancer risk and noncancer hazard provide the basis for identifying the types of mitigation measures that may be appropriate, if needed, to reduce risks to levels that would be fully protective of human health and the environment. A detailed discussion of uncertainties associated with the HRA is presented in Attachment E. The third and final part of this section presents the summary and conclusions of the risk characterization. 6.1 Methodology Estimating incremental cancer risks and noncancer hazard indices for exposures to chemicals in soils and soil gas requires information regarding chemical concentrations in the various media, the level of intake of the chemical, and the relationship between intake of the chemical and its toxicity as a function of human exposure to the chemical. The methodology used to derive the incremental cancer risks and noncancer hazard indices for the selected chemicals of concern is based principally on guidance provided in the regulatory documents listed below.
• U.S. Environmental Protection Agency (USEPA). 1989a. Risk Assessment Guidance for Superfund. Volume I: Human Health Evaluation Manual (Part A). Interim Final. Office of Emergency and Remedial Response. EPA/540/1-89/002. Washington, D.C. December.
• U.S. Environmental Protection Agency (USEPA). 1991. Risk Assessment Guidance for
Superfund. Volume I: Human Health Evaluation Manual. Supplemental Guidance. Standard Default Exposure Factors. Office of Emergency and Remedial Response. March 25.
• California Environmental Protection Agency (Cal/EPA). 1994. Preliminary
Endangerment Assessment Manual. Department of Toxic Substances Control (DTSC). January (Second Printing June 1999).
• California Environmental Protection Agency (Cal/EPA). 2005. DTSC/HERD Human
Health Risk Assessment (HHRA) Note Number 1. Department of Toxic Substances Control. October 27.
The sections below present the equations used to derive the incremental cancer risks and noncancer hazard indices for the selected COPCs.
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6.1.1 Carcinogenic Health Effects The equations below describe the established relationship between estimated intake, toxicity, and risk for carcinogenic health effects. For exposures occurring via soil ingestion and dermal contact pathways, the relationship for carcinogenic effects is given by the following equation (USEPA, 1989a): Cancer Risk = CDI x CSF Where:
Cancer Risk = Cancer risk; the incremental probability of an individual developing cancer as a result of exposure to a particular cumulative dose of a potential carcinogen (unitless);
CDI = Chronic Daily Intake of a chemical (mg chemical/kg body weight-day);
CSF = Cancer Slope Factor; the toxicity value which indicates the upper limit on lifetime incremental cancer risk per unit of dose of chemical (mg chemical/kg body weight-day)-1.
For the inhalation pathway, the relationship for carcinogenic effects is given by the following equation (USEPA, 2009): Cancer Risk = EC x URF Where:
Cancer Risk = Cancer risk; the incremental probability of an individual developing cancer as a result of exposure to a particular cumulative concentration of a potential carcinogen (unitless);
EC = Exposure Concentration of a chemical (mg chemical/m3 air); URF = Unit Risk Factor; the toxicity value which indicates the upper limit
on lifetime incremental cancer risk per unit of concentration of chemical (mg chemical/m3 air)-1.
The formulas for developing the CDIs and ECs used in this evaluation are presented in Tables 5 and 6 for residential and commercial worker populations, respectively. The calculated ECs for the current off-site commercial and residential scenarios for the inhalation of particulates associated with exposed soils are summarized in Table 11 for carcinogenic chemicals. CDIs and ECs for the future on-site residential scenario for exposure to carcinogenic chemicals in on-site soils are summarized in Table 13. Estimated incremental cancer risks associated with exposure to carcinogenic chemicals in on-site soils for exposure scenarios evaluated in this HRA are presented in the following tables:
• Table 15: current off-site residential and commercial scenarios, and • Table 18: future on-site residential scenario.
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Estimated incremental cancer risks associated with exposure to carcinogenic VOCs in soil gas via inhalation of vapors in indoor and outdoor air for exposure scenarios evaluated in this HRA are presented in the following tables:
• Table 21: current off-site and future on-site residential scenarios, outdoor air risks; • Table 22: current off-site commercial scenario, outdoor air risks; and • Table 23: future on-site residential scenario, indoor air (vapor intrusion) risks.
As a point of reference, we note that the National Contingency Plan (NCP) (40 CFR 300) indicates that lifetime incremental cancer risks posed by a site should not exceed a range of one in one million (1 x 10-6) to one hundred in a million (1 x 10-4). Cal/EPA’s point of departure for excess incremental lifetime cancer risk for all receptor groups (i.e., residential and commercial populations) is 1 x 10-6 and risk management decisions may raise this criterion dependent on site specific conditions. For instance, the “target” cancer risk typically used by Cal/EPA and USEPA in determining the need for mitigation is 1 x 10-5 for commercial populations on commercial sites. 6.1.2 Noncarcinogenic Health Effects The relationship for the ingestion and dermal contact pathways for a noncarcinogenic chemical is given by the following equation (USEPA, 1989a):
Hazard Quotient = CDI/RfD Hazard Index = ∑ Hazard Quotient
Where:
Hazard Quotient = Hazard Quotient; an expression of the potential for a chemical to cause noncarcinogenic effects, which relates the allowable amount of a chemical (RfD) to the estimated Site-specific intake (unitless);
Hazard Index = Hazard Index; the sum of the chemical-specific Hazard Quotients, which represents the cumulative potential for predicted exposures to result in noncarcinogenic effects (unitless);
CDI = Chronic Daily Intake of a chemical (mg chemical/kg body weight-day);
RfD = Reference dose; the toxicity value indicating the threshold amount of chemical contacted below which no adverse health effects are expected (mg chemical/kg body weight-day).
For a noncarcinogenic chemical, the relationship for the inhalation pathway is given by the following equation (USEPA, 2009):
Hazard Quotient = EC/RfC Hazard Index = ∑ Hazard Quotient
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Where:
Hazard Quotient = Hazard Quotient (HQ); an expression of the potential for a chemical to cause noncarcinogenic effects, which relates the allowable concentration of a chemical (reference concentration [RfC]) to the estimated site-specific exposure concentration (unitless);
Hazard Index = Hazard Index (HI); the sum of the chemical-specific Hazard Quotients, which represents the cumulative potential for predicted exposures to result in noncarcinogenic effects (unitless);
EC = Exposure Concentration of a chemical (mg chemical/m3 air); RfC = Reference concentration; the toxicity value indicating the
threshold concentration of chemical contacted below which no adverse health effects are expected (mg chemical/m3 air).
The formulas for developing the CDIs and ECs used in this evaluation are presented in Tables 5 and 6 for residential populations and for commercial worker populations, respectively. The calculated ECs for the current off-site commercial and residential scenarios for the inhalation of particulates associated with noncarcinogenic chemicals in the exposed soils are summarized in Table 12. CDIs and ECs for the future on-site residential scenario for exposure to noncarcinogenic chemicals in on-site soils are summarized in Table 14. Estimated noncancer hazard indices associated with exposure to noncarcinogenic chemicals in on-site soils for exposure scenarios evaluated in this HRA are presented in the following tables:
• Table 16: current off-site residential and commercial scenarios, and • Table 19: future on-site residential scenario.
Estimated noncancer hazard indices associated with exposure to noncarcinogenic VOCs in soil gas via inhalation of vapors in indoor and outdoor air exposure scenarios evaluated in this HRA are presented in the following tables: :
• Table 21: current off-site and future on-site residential scenario, outdoor air hazard indices;
• Table 22: current off-site commercial scenario, outdoor air hazard indices; and • Table 23: future on-site residential scenario, indoor air (vapor intrusion) hazard indices.
For noncancer health effects, an HI of less than or equal to 1 implies that the intake for a given population and chemical is less than or equal to levels where adverse noncancer health effects could occur. For noncancer health hazards, an HI of 1 is identified as the target level of concern. Chemical exposures that yield hazard indices of less than 1 are not expected to result in adverse noncancer health effects (USEPA, 1989a).
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6.2 Results of Cancer Risk and Noncancer Hazard Assessment This section presents the results of the incremental cancer risk and noncancer hazard estimates for exposures to COPCs in on-site soils and soil gas under current and future land-use scenarios. The current land-use scenarios include the current off-site residential and commercial scenarios. The future land-use scenario includes a future on-site residential scenario. As previously indicated, the incremental cancer risks and noncancer hazards estimated associated with exposure to COPCs in on-site soils under the exposure scenarios evaluated in this HRA are presented in Tables 15, 16, 18, and 19. The incremental cancer risks and noncancer hazards estimated associated with exposure to COPCs in soil gas under the exposure scenarios evaluated in this HRA are presented in Tables 21 through 23. Also, the estimated blood lead levels for current off-site and future on-site residential populations are presented in Tables 17 and 20, respectively. 6.2.1 Current Land-Use Scenario Off-site Resident The estimated incremental cancer risks and noncancer HIs for current off-site residential populations posed by the presence of COPCs in exposed soils and VOCs in soil gas are summarized in the following table:
Media Off-site Resident Cancer Risk Noncancer HI
Exposed Soils 8.4E-08 0.0094 (Child)
Soil Gas 1.9E-09 (Average)
0.00014 (Average)
Cumulative 8.6E-08 0.0095 As indicated in Table 15, the estimated total incremental cancer risk from the inhalation of COPCs in exposed soils for current off-site residents is 8.4 x 10-8, which is well below the acceptable risk range of 1 x 10-6 to 1 x 10-4. Approximately 55% of the estimated total incremental cancer risk for current off-site residents is attributable to nickel in exposed soils, with cobalt and CPAH contributing approximately 22% and 21% to the estimated total incremental cancer risk, respectively. As indicated in Table 16, the estimated total noncancer hazard from the inhalation of COPCs in exposed soils for current off-site residents is 0.0094, which is well below the acceptable HI of 1. Approximately 89% of the estimated total noncancer HI for current off-site residents is attributable to nickel, and 8% is attributable to cobalt. As shown in Table 21, the estimated average incremental cancer risk and noncancer hazard from VOCs in outdoor air for current off-site residents are 1.9 x 10-9 and 0.00014, respectively, which are both well below the acceptable risk and HI levels.
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In sum, estimated cumulative incremental cancer risks and noncancer HIs for the current off-site resident from the inhalation of soil particulates and VOCs in outdoor air are 8.6 x 10-8 and 0.0095, respectively. The estimated cumulative incremental cancer risk is well below the acceptable range of 1 x 10-6 to 1 x 10-4, and the estimated cumulative noncancer HI is well below the acceptable HI of 1. Table 17 presents the output from LEADSPREAD for current off-site residents exposed via the inhalation of particulates. As indicated in Table 17, the 95% UCL of lead detected in exposed soils (1,291 mg/kg) results in an incremental increase in PbB in the child of 0.0046 µg/dL (at the 90th percentile), which is below the OEHHA’s recommended benchmark change in blood lead concentration of 1 µg/dL (OEHHA 2007). Accordingly, the lead concentrations in exposed soils would not pose a significant risk to current off-site residents, and would not result in a significant increase in blood-lead levels. Off-site Commercial Worker The estimated incremental cancer risks and noncancer HIs for current off-site commercial populations posed by the presence of COPCs in exposed soils and VOCs in soil gas are summarized in the following table:
Media Off-site Commercial Worker Cancer Risk Noncancer HI
Exposed Soils 1.7E-08 0.0022
Soil Gas 3.7E-10 (Average)
0.000034 (Average)
Cumulative 1.7E-08 0.0022 As indicated in Table 15, the estimated total incremental cancer risk from the inhalation of COPCs in exposed soils for current off-site commercial workers is 1.7 x 10-8, which is well below the acceptable risk range of 1 x 10-6 to 1 x 10-4. Approximately 55% of the estimated total incremental cancer risk for current off-site commercial workers is attributable to nickel in exposed soils, with cobalt and CPAH contributing approximately 22% and 21%, respectively. As indicated in Table 16, the estimated total noncancer hazard from the inhalation of COPCs in exposed soils for current off-site commercial workers is 0.0022, which is well below the acceptable HI of 1. Approximately 89% of the estimated total noncancer HI for the current off-site commercial worker is attributable to nickel, with cobalt contributing approximately 8%. Estimated average incremental cancer risks and noncancer HIs from VOCs in outdoor air for the current off-site commercial worker, as shown in Table 22, are 3.7 x 10-10 and 0.000034, respectively, which are both well below acceptable risk and HI levels. In sum, the estimated cumulative incremental cancer risk and noncancer HI from the inhalation of soil particulates and VOCs in outdoor air for the current off-site commercial worker are 1.7 x 10-8 and 0.0022, respectively. The estimated cumulative incremental cancer risks is well below
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the acceptable risk range of 1 x 10-6 to 1 x 10-4, and the estimated cumulative noncancer HIs are well below the acceptable HI of 1. The USEPA lead uptake model for non-residential exposures is mainly based on the soil ingestion pathway. As current off-site commercial workers are assumed to be only exposed via the inhalation of particulates, the predicted incremental increase in blood lead concentrations for the off-site commercial worker and the fetus of the offsite commercial worker would be lower than that predicted for the off-site resident due to the lower exposure frequency. As the predicted incremental increase in blood lead concentration for the off-site child resident is predicted to be below the OEHHA’s recommended benchmark change in blood lead concentration of 1 µg/dL (OEHHA, 2007), we can conclude that lead exposures to current off-site commercial workers would also result in a predicted incremental increase in blood lead concentration below the OEHHA’s recommended. 6.2.2 Future Land-Use Scenario On-site Resident The estimated incremental cancer risks and noncancer HIs for the future on-site residential population posed by the presence of COPCs in on-site soils and in soil gas are summarized in the following table:
Media Cancer Risk Noncancer HI On-site Soils 6.7E-03 4.8 (Child) Soil Gas 1.3E-06 (Maximum) 0.074 (Maximum) Cumulative 6.7E-03 (Maximum) 4.8 (Maximum)
As indicated in Table 18, the estimated total incremental cancer risk from soils for the future on-site resident is 6.7 x 10-3, which is above the acceptable risk range of 1 x 10-6 to 1 x 10-4. Approximately 97%, 2.6%, and 0.2% of the estimated total incremental cancer risk is attributable to CPAHs (expressed as benzo(a)pyrene equivalents, 6.5 x 10-3), naphthalene (1.7 x 10-4), and benzene (1.5 x 10-6), respectively. Approximately 67% of the estimated total incremental cancer risk is attributable to the ingestion pathway and 33% to the dermal contact pathway. As indicated in Table 19, the estimated total noncancer HIs for the future on-site resident child and adult are 4.8 and 0.55, respectively, which are above and below, respectively, the acceptable HI of 1. Approximately 32%, 12%, 8%, 7%, 6%, and 6% of the cumulative HI for the future on-site resident child is attributable to thallium (1.6), naphthalene (0.56), pyrene (0.39), cobalt (0.35), benzene (0.29), and fluoranthene (0.28), respectively. Approximately 83% of the estimated total HI from soils for the future on-site resident child is attributable to the ingestion pathway, and approximately 17% is attributable to the dermal pathway. Note, that there are uncertainties associated with the toxicity value (i.e., RfD recently withdrawn by USEPA from the IRIS database) used to estimate the hazard associated with exposure to thallium in soils. Further, thallium was detected in only 1 out of 243 samples at a concentration of 7.8 mg/kg. Due to the limited number of detections, the detected concentration of 7.8 mg/kg
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was used as the EPC. The EPC is 18-times higher than the mean concentration for thallium. Therefore, the potential exposure to thallium in on-site soils and associated noncancer HI for thallium (i.e. 1.6) are believed to be overestimated in this HRA and the actual noncancer HI is likely below 1. As shown in Table 23, estimated maximum incremental cancer risks for the future on-site resident from the vapor intrusion pathway range from 2.1 x 10-8 (from location SG-6 at 8 feet bgs) to 1.3 x 10-6 (from location SG-2 at 8 feet bgs), where naphthalene 2 (7.4 x 10-7; 55%), ethylbenzene (4.1 x 10-7; 31%), and benzene 3 (1.3 x 10-7; 10%) are the main drivers of cancer risk. Estimated maximum incremental cancer risks for the future on-site resident from the vapor intrusion pathway are below or equivalent to the lower end of the acceptable risk range of 1 x 10-
6 to 1 x 10-4. Note that the highest levels of benzene and/or naphthalene in on-site soils were detected at boring locations SB-6 and SB-49. The closest soil gas location to SB-6 is SG-2; approximately 40 feet northeast of SB-6. The closest soil gas location to SB-49 is SG-5; approximately 40 feet southwest of SB-49. As there are no soil gas data collected in close proximity to SB-6 and SB-49, future potential vapor intrusion risks presented in this HRA may be underestimated for certain areas of the Site. These locations with elevated levels of benzene and/or naphthalene in on-site soils will be address in the FS/RAW. Estimated maximum noncancer HIs for the future on-site resident from vapor intrusion range from 0.0018 (from location SG-6 at 8 feet bgs) to 0.074 (from location SG-2 at 8 feet bgs), with total xylenes (0.021; 29%), naphthalene (0.017; 23%), toluene (0.017; 22%), and 1,2,4-trimethylbenzene (0.011; 14%) as the main contributors to the noncancer hazard. Estimated maximum incremental hazards for the future on-site resident from the vapor intrusion pathway are below the acceptable HI of 1. As shown in Table 21, the estimated average incremental cancer risk and noncancer hazard from VOCs in outdoor air for future on-site residents are 1.9 x 10-9 and 0.00014, respectively, which are both well below the acceptable risk and HI levels. In sum, the estimated maximum cumulative incremental cancer risk from soils and soil gas for the future on-site resident is 6.7 x 10-3, which is above the acceptable risk range of 1 x 10-6 to 1 x 10-4 and attributed primarily to direct exposure to COPCs in on-site soils. The estimated maximum cumulative noncancer HI for the future on-site resident child is 4.8, which is above the acceptable HI of 1 and also attributed primarily to direct exposure to COPCs in on-site soils. As indicated in Table 20, the 95% UCL of lead detected in exposed soils (631 mg/kg) results in an incremental increase in PbB in the child of 8.2 µg/dL (at the 90th percentile), which is above 2 Naphthalene was not detected above analytical reporting limit (RL) in sample collected from location SG-2 at 8 feet bgs. However, naphthalene was conservatively assumed to be presence at one-half the RL for the estimate of vapor intrusion risk. 3 Benzene was not detected above analytical RL in sample collected from location SG-2 at 8 feet bgs. However, benzene was conservatively assumed to be presence at one-half the RL for the estimate of vapor intrusion risk.
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the OEHHA’s recommended benchmark change in blood lead concentration of 1 µg/dL (OEHHA 2007). Therefore, the concentrations of lead in on-site soils may result in an increase in the blood lead level for the future on-site resident of more than 1 ug/dL. 6.2.3 Uncertainties in Risk Characterization The risk assessment includes several uncertainties that warrant discussion. Many of the assumptions used in this risk assessment, regarding the representativeness of the sampling data, human exposures, fate and transport modeling, and chemical toxicity are conservative, following agency guidance, and reflect a 90th or 95th percentile value, rather than a typical or average value. The use of several conservative exposure and toxicity assumptions can introduce considerable uncertainty into the risk assessment. By using conservative exposure or toxicity estimates, the assessment can develop a significant conservative bias that may result in the calculation of significantly higher cancer risks or noncancer hazards than are actually posed by the chemicals present in soils and soil gas. A discussion of the key uncertainties used in this evaluation for the Site is discussed in Attachment E. 6.3 Summary and Conclusions An HRA was conducted to evaluate potential risks to current and/or future populations that could be exposed to Site-related chemicals at the Site. As the Site is currently vacant and fenced, the scope of the HRA focuses primarily on evaluations associated with the potential future unrestricted use of the Site for hypothetical residential purposes. The results of the HRA will be used to will be used to identify areas of the Site where remediation, or other forms of risk management, may be appropriate, with the overall goal of long-term protection of human health and the environment. The HRA was intended to be conservative, resulting in projected estimates of health risks that are likely higher than the actual risks that may be posed by the Site. The human receptors that could potentially be impacted through use of the Site were identified and included in the evaluation. All chemicals detected in Site soil sampling activities were included in the evaluation under the assumption that the 95% UCL represents the exposure point concentration to which human populations may be exposed. All VOCs detected in soil gas collected during the RI sampling activities were included in the evaluation and the maximum detected concentration at each sampled depth of each soil gas location was used to estimate the concentrations representative of ambient and indoor air exposure point concentrations to which human populations may be exposed. The quantitative risk results and corresponding conclusions for each of the land use scenarios is summarized below. Current Offsite Residential and Commercial Scenarios HRA results indicate that none of the chemicals detected in exposed surface soils and soil gas at the Site pose a significant health risk to current off-site residential and commercial populations. Estimated incremental cancer risks and noncancer HIs for these populations are well below 1 x 10-6 and 1, respectively. Further, levels of lead in exposed soils at the Site are not expected to result in an increase in blood lead levels above OEHHA’s benchmark value of 1 ug/dL for current off-site residential and commercial populations. Based on these conservative upper-
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bound risk estimates, remedial action, or other form of risk management, is not necessary to protect the health of current off-site residential and commercial populations. Future Onsite Residential Scenario This HRA also evaluates potential health risks to future on-site residential populations. In the future, it is possible that the Site could be redeveloped for residential purposes and buildings could be constructed anywhere on the Site. The results of this HRA indicate that the estimated incremental cancer risks and noncancer hazards associated with COPCs in soil gas via vapor intrusion for future on-site residential populations are below or at acceptable levels (i.e., incremental cancer risks are below or equivalent to the lower end of the acceptable risk range of 1 x 10-6 to 1 x 10-4 and the noncancer HIs are below 1). We note, however, the estimated incremental cancer risks for the future on-site residential population are based on existing soil gas data collected during the RI. Soil sampling results have indicated areas of elevated benzene and/or naphthalene concentrations in on-site soils (i.e., at SB-6 and SB-49) where no soil gas data was collected. These areas will be addressed in the FS/RAW. The estimated incremental cancer risks associated with COPCs in soils for the future on-site residential population are above the acceptable risk range of 1 x 10-6 to 1 x 10-4, due principally to the presence of CPAHs, naphthalene, and benzene in soils. The estimated noncancer hazards for the future on-site residential populations are also above the acceptable HI of 1, due primarily to naphthalene, pyrene, cobalt, benzene, and fluoranthene in soils. Further, the levels of lead in soils at the Site could result in an increase in blood lead levels above OEHHA’s benchmark value of 1 ug/dL for residential populations. Accordingly, the results of the HRA support that levels of CPAHs, naphthalene, pyrene, cobalt, benzene, fluoranthene, and lead present in soils would require some remediation or other form of risk management (e.g., institutional controls) in the event that the Site were to be developed in the future for residential purposes.
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7.0 REMEDIAL ACTION GOALS 7.1 Overview of the Remedial Action Goals The overall remedial action goal is to ensure that residual concentrations of chemicals remaining at the Site are protective of human health and the environment. Ideally, the overall remedial action goal is to remediate the Site to a point that the conditions are safe and suitable for future hypothetical residential land use, and that long-term restrictions on future property usage would therefore not be necessary. From a practical standpoint, removal of all impacted soils located at depth may not be feasible. Accordingly, the remedial goal will be focused on reducing concentrations of COPCs in soil present on-site, as practicable and feasible, to levels that will be protective of future residential land uses. A determination as to whether the overall remedial action goal has been achieved will be based on the results obtained during the confirmation sampling, conducted following the implementation of the remedial action, and will incorporate a comprehensive quantitative post-remediation health risk evaluation. If the results of the quantitative post-remediation risk assessment indicate that the overall remedial action goal of unrestricted land use in remediated areas has not been obtained, then the types of appropriate long-term institutional controls that would be needed for the long-term protection of human health will be identified and delineated. The levels of CPAHs, naphthalene, pyrene, cobalt, benzene, fluoranthene, and lead present in soils at the Site exceed levels that would be considered acceptable for future on-site residential use. Restoring the Site to a condition that would be protective of future unrestricted land uses would thus warrant some form of remediation. When developing remedial action goals under State and Federal regulatory programs, the NCP (40 CFR 300) is commonly cited as the basis for determining an acceptable incremental risk for humans. According to the NCP, lifetime incremental cancer risks posed by a remediated site should not exceed one in a million to one hundred in a million (i.e., 10-6 to 10-4), and noncarcinogenic chemicals should not be present at levels expected to cause adverse health effects. Risk-based screening concentrations (RBSCs), concentrations of individual chemicals in soils and soil gas that correspond to an incremental cancer risk of 10-6 or a noncancer HI of 1.0 for future potential residential populations, are presented in Table 24 for both cancer effects and noncarcinogenic effects, and will be used to identify and target those areas of the Site where some form of mitigation or institutional controls may be appropriate. The derivation of the RBSCs is discussed in Section 7.2 below. As previously discussed, ambient soil concentrations of some chemicals, such as CPAHs, commonly exceed concentrations corresponding to incremental cancer risks of 10-6 to 10-4. For example, based on the results of the HRA, the concentrations of CPAHs [expressed as benzo(a)pyrene equivalents] corresponding to 10-6, 10-5 and 10-4 cancer risk levels for a residential exposure scenario are 0.036, 0.36 and 3.6 mg/kg, respectively. The statistical estimate of the average concentration of CPAHs (i.e., the 95% UCL of benzo(a)pyrene equivalent concentrations) in northern California surface soils is 0.40 mg/kg (presented in Table 25). Thus, while the levels of CPAHs in background soils do not exceed concentrations
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corresponding to the upper end of the acceptable risk range defined by the USEPA in the NCP, they are greater than the concentrations corresponding to 10-6 cancer risks. Remediating the CPAHs present in soils at the Site to levels corresponding to risks at the 10-6 level (i.e., to 0.036 mg/kg and 0.39 mg/kg, respectively) would require reducing CPAH concentrations to levels below ambient levels. Because it is not usually possible or practical to reduce concentrations below ambient levels, the risk management objective normally imposed by regulatory agencies in these situations is to remediate, where practicable, to ambient levels. If remediated to the point that ambient concentrations are restored, the CPAHs in on-site soils would pose no incremental risk to human populations above that posed by ambient levels of CPAHs in northern California soils, ensuring that any potential future exposure to on-site soils is fully protective of human health. The ambient levels of CPAHs used in this HRA are discussed in Section 7.3 below. 7.2 Derivation of Risk-Based Screening Concentrations for Soil This section presents the methodology to derive the range of chemical-specific RBSCs for soils that would be protective of future residential populations. These residential RBSCs can then be used to identify those areas of the Site that could either be targeted for remediation or which should be subjected to other forms of long-term risk management. As described above, the NCP (40 CFR 300) indicates that lifetime incremental cancer risks posed by a site should not exceed a range of one in one million (1 x 10-6) to one hundred in a million (1 x 10-4) and noncarcinogenic chemicals should not be present at levels expected to cause adverse health effects (i.e., an HI greater than 1.0). As a starting point, target cancer risk levels used in the calculation of the RBSCs are set at the lower end of the risk range of 1 x 10-6. The target HI used for noncarcinogens is 1.0. These RBSCs are then compared to the soil concentrations measured at the Site to identify those chemicals and specific areas of the Site that will either be the focus of the upcoming removal activities, or be incorporated into the long-term risk management of the Site. 7.2.1 Methodology Section 6.2 presented the incremental cancer risks and noncancer hazards posed by a given concentration of chemical present at the Site under future hypothetical residential exposure scenarios. By rearranging these equations, we can set the target cancer risk or noncancer hazard at a given “acceptable” level, and then determine the concentration of a chemical that will be associated with that given target risk. This is the common method used to estimate remedial action goals for a Site, where the results of the risk assessment indicate that some form of remediation or risk management is warranted. In this HRA, the risk-based remedial action goals are referred to as RBSCs. For carcinogens, the following equation is used to derive the soil RBSC:
FINAL Human Health Risk Assessment June 2011 Former Lodi Manufactured Gas Plant Site
7-3 IRIS ENVIRONMENTAL
⎟⎟⎠
⎞⎜⎜⎝
⎛⎥⎦⎤
⎢⎣⎡
⎥⎦⎤
⎢⎣⎡
⎥⎦⎤
⎢⎣⎡
⎥⎦⎤
⎢⎣⎡
=+++
dera
dera
inga
inga
inhpa
inhpa
inhva
inhvaa
ConcRisk
ConcRisk
ConcRisk
ConcRisk
LevelRisketTcarcinogenRBSC
,
,
,
,
,
,
,
,
arg,
Where:
RBSCa,carcinogen = Risk-based Screening Concentration, chemical a, for carcinogenic effects, (mg/kg)
Target Risk Level = Target Cancer Risk Level (unitless); Riska,inhv = Calculated Cancer Risk for Chemical a for the vapor
inhalation pathway, developed as described above (unitless);
Riska,inhp = Calculated Cancer Risk for Chemical a for the particulate inhalation pathway, developed as described above (unitless);
Riska,ing = Calculated Cancer Risk for Chemical a for the soil ingestion pathway, developed as described above (unitless);
Riska,der = Calculated Cancer Risk for Chemical a for the dermal contact pathway, developed as described above (unitless);
Conca,inhv = Representative Exposure Concentration of Chemical a for the vapor inhalation pathway; mg/kg
Conca,inhp = Representative Exposure Concentration of Chemical a for the particulate inhalation pathway; mg/kg
Conca,ing = Representative Exposure Concentration of Chemical a for the soil ingestion pathway; mg/kg
Conca,der = Representative Exposure Concentration of Chemical a for the dermal contact pathway; mg/kg
For noncarcinogens, the following equation is used to derive the soil RBSC:
⎟⎟⎠
⎞⎜⎜⎝
⎛⎥⎦⎤
⎢⎣⎡
⎥⎦⎤
⎢⎣⎡
⎥⎦⎤
⎢⎣⎡
⎥⎦⎤
⎢⎣⎡
=+++
dera
dera
inga
inga
inhpa
inhpa
inhva
inhvaa
ConcHQ
ConcHQ
ConcHQ
ConcHQ
HIetTgennoncarcinoRBSC
,
,
,
,
,
,
,
,
arg,
Where:
RBSCa,noncarcinogen = Risk-based Screening Concentration, chemical a, for noncarcinogenic effects, (mg/kg)
Target HI = Target Hazard Index Level (unitless);
FINAL Human Health Risk Assessment June 2011 Former Lodi Manufactured Gas Plant Site
7-4 IRIS ENVIRONMENTAL
HQa,inhv = Calculated Hazard Quotient for Chemical a for the vapor inhalation pathway, developed as described above (unitless);
HQa,inhp = Calculated Hazard Quotient for Chemical a for the particulate inhalation pathway, developed as described above (unitless);
HQa,ing = Calculated Hazard Quotient for Chemical a for the soil ingestion pathway, developed as described above (unitless);
HQa,der = Calculated Hazard Quotient for Chemical a for the dermal contact pathway, developed as described above (unitless);
Conca,inhv = Representative Exposure Concentration of Chemical a for the vapor inhalation pathway; mg/kg
Conca,inhp = Representative Exposure Concentration of Chemical a for particulate inhalation pathway; mg/kg
Conca,ing = Representative Exposure Concentration of Chemical a for soil ingestion pathway; mg/kg
Conca,der = Representative Exposure Concentration of Chemical a for dermal contact pathway; mg/kg
As described above in Section 4.5.2, the risks associated with the inhalation of VOCs were developed using soil vapor sampling data, where available, as this soil vapor data provides the most direct estimate of the concentration of the VOC that may be present in the vapor phase. Soil vapor data, in preference over soil matrix data, is the data that is currently preferred by DTSC in evaluating the risks associated with the indoor air vapor intrusion pathway. We also understand that DTSC prefers that the outdoor air vapor pathway be incorporated into the calculation of soil risk-based goals. However, in order to formulate soil matrix RBSCs for those VOCs that were detected in the soil gas phase, the relationship between the concentration of the VOC in soils and the concentration in soil vapor needs to be determined. For developing the soil RBSCs, this soil matrix-to-soil vapor phase relationship was determined using the USEPA Soil Screening Guidance (USEPA, 1996) VF equation. In other words, for VOCs detected in soils, the VF equation was used in developing the RBSC (i.e., in developing the outdoor air vapor component of the overall multi-pathway RBSC that includes the ingestion, dermal absorption and outdoor air inhalation routes). The VF equation and calculations for VOCs detected in soils are presented in Attachment F. In general, use of the VF equation for VOCs results in RBSCs that are driven by the outdoor air vapor pathway; the RBSCs calculated using the VF equation can be extremely low due to the conservative nature of the equation. As an example, the RBSCs for the relevant VOCs were calculated under the assumption of an infinite source of mass of VOC impact that begins immediately below the ground surface. This is clearly an overestimate of the mass available for transport; this assumption was made in the development of the RBSCs merely as a screening technique and in an attempt to ensure that the proposed remedial measures remove any potentially significant mass of Site-related VOCs, as practicable and feasible.
FINAL Human Health Risk Assessment June 2011 Former Lodi Manufactured Gas Plant Site
7-5 IRIS ENVIRONMENTAL
As an example, in the case of naphthalene, the soil RBSC is driven primarily by the inhalation of outdoor air vapor pathway. An example soil RBSC calculation for naphthalene is provided in Attachment F. A final determination as to whether the Site has achieved the overall cumulative post-remedial objectives will involve soil gas confirmation samples. 7.3 Derivation of Ambient Based Screening Concentrations for Soil Given that risk-based residential cleanup goals for CPAHs in soils are below ambient concentrations, the numerical remedial goal for these compounds would not be risk-based, but rather would be based on the ambient concentrations of CPAHs. In order to facilitate the development of an ambient background data set for CPAHs in northern California, a dataset was compiled from previous site investigations in northern California conducted with the oversight of DTSC by PG&E and the United States Navy. The dataset was developed in cooperation and collaboration with a task group of representatives from the HERD and Site Mitigation branches of DTSC, Cal/EPA. The team of consulting firms involved in the development of the database were ENVIRON, Entrix, Iris Environmental, and ENV America. The final dataset consists of eighty-six data points from twenty-one different sites. The details of this study are presented in a report that was submitted to HERD June 7, 2002 (ENVIRON et al., 2002). Multiple analyses conducted in the study demonstrate that the final dataset is consistent with a lognormal distribution and support the hypothesis that the final dataset represents a single background population. The arithmetic mean and the 95% UCL of the mean of the background CPAH dataset, in benzo(a)pyrene equivalents, are 0.21 mg/kg and 0.40 mg/kg, respectively. Recently, DTSC has issued an Advisory (Cal/EPA 2009a) that supports the use of the PAH background dataset as a tool for assessing PAH impacts and making remediation decisions for PAHs at sites. Consistent with the approaches used at other sites, and with the approach often used for determining ambient-based remediation targets for inorganics, an upper tolerance limit (UTL) of the ambient distribution is often proposed as the initial remediation target for the Site. The USEPA has described the calculation of the UTL, and has suggested its use for groundwater monitoring activities (USEPA, 1989b), although it is applicable to performing background comparisons for soil samples as well. The approach used in calculating the UTL is consistent with the approach recommended by the USEPA (1989b). Table 25 presents the UTL of the 86 background samples. As indicated, the 95% UTL (95% coverage and 95% confidence) is 1.5 mg/kg (in benzo(a)pyrene equivalents). Because the coverage of the UTL is set at 95%, approximately 5% of samples that are actually representative of ambient concentrations will be greater than the UTL of 1.5 mg/kg. Another parameter that is commonly used in establishing ambient-based remediation targets is the 95th percentile of the distribution. Measured concentrations that are below the 95th percentile are considered to be ambient. It is understood that the DTSC has recommended the use of the 95th percentile for determining ambient levels of metals at former military bases. As indicated in Table 25, the 95th percentile of the northern California background dataset is 0.92 mg/kg. Because the 95th percentile is lower than the UTL of the data, we propose to use 0.92 mg/kg as the initial ambient based screening concentration (ABSC) for identifying areas of the
FINAL Human Health Risk Assessment June 2011 Former Lodi Manufactured Gas Plant Site
7-6 IRIS ENVIRONMENTAL
Site for either remediation or other forms of risk management. On-site concentrations below the initial background-based screening concentration ABSC of 0.9 mg/kg will be considered representative of ambient concentrations, and will not initially be targeted for remediation or other forms of risk management. 7.4 Results: Comparison of Soil RBSCs and ABSCs to Detected Concentrations RBSCs for individual chemicals in soils that correspond to a cancer risk of 10-6 or a noncancer hazard index of 1.0 for future potential residential populations are presented in Table 24 for cancer effects and noncarcinogenic effects. The OEHHA residential soil CHHSL for lead of 80 mg/kg is used in this HRA as the target RBSC for lead for future on-site residents, as recommended by DTSC (Cal/EPA, 2009e) and is also presented in Table 24. The ABSC for CPAHs is also presented in Table 24. Table 26 summarizes the samples and chemicals with concentrations above their respective residential RBSCs and ambient concentrations. As indicated, chemicals with individual detections that exceed their respective residential soil RBSCs/ABSCs include 2-methylnaphthalene, acenaphthylene, antimony, benzene, benzo(g,h,i)perylene, CPAHs (expressed as benzo(a)pyrene equivalent), cobalt, ethylbenzene, fluoranthene, lead, naphthalene, nickel, pyrene, and thallium. The samples in the top 10 feet of on-site soils where the above compounds were detected at concentrations above or equivalent to their respective residential RBSCs or ambient concentrations are mostly collocated with sample locations and depths that contain CPAHs at levels above both the RBSC and/or ambient concentrations. Exceptions to this case are samples SS-10 (lead), TP-1-0.5' (lead), TP-5-0.5' (lead), SB-37-0' (naphthalene), SB-39-0' (naphthalene), SB-40-3' (lead), SB-44-0' (nickel), and SB-45-0' (naphthalene), where exceedances of lead, naphthalene, or nickel occur without a concomitant exceedance of the CPAH ABSC. 7.5 Demonstrating Attainment of the Remedial Action Goal: Post Remediation Risk
Assessment Following the completion of remediation activities, soil confirmation samples will be collected from the base and sidewalls of the excavated areas and analyzed for PAHs, VOCs, and select metals. Further, soil gas confirmation samples will be collected from areas excavated due to elevated levels of VOCs in soils; for instance, in the vicinity of SB-6 and SB-49. The measured concentrations from these confirmation samples will be evaluated to confirm attainment of the remedial action goals. A post-remediation risk assessment will be conducted to evaluate the overall effectiveness of the remediation in achieving the stated remedial action goals. The post-remediation risk assessment will describe whether the remedial action goals for the Site have been attained, and will provide the technical basis for any mitigation measures and institutional controls that will be appropriate to ensure the long-term protection of human health associated with residual impacts that remain on-site.
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8-1 IRIS ENVIRONMENTAL
8.0 REFERENCES American Society for Testing and Materials (ASTM). 1995. Standard Guide for Risk-Based
Corrective Action Applied at Petroleum Release Sites. Designation: E 1739-95. California Environmental Protection Agency (Cal/EPA). 2011. Toxicity Criteria Database.
Table of cancer potency factors (July 21, 2009) maintained on-line at http://www.oehha.ca.gov/risk/pdf/tcdb072109alpha.pdf. Office of Environmental Health Hazard Assessment (OEHHA). Table of Air Chronic Reference Exposure Levels Adopted by OEHHA maintained on-line at http://www.oehha.ca.gov/air/allrels.html. Office of Environmental Health Hazard Assessment (OEHHA).
California Environmental Protection Agency (Cal/EPA). 2009a. Use of the Northern and
Southern California Polynuclear Aromatic Hydrocarbon (PAH) Studies in the Manufactured Gas Plant Site Cleanup Process. Department of Toxic Substances Control. July 1.
California Environmental Protection Agency (Cal/EPA). 2009b. Interim Guidance Evaluating
Human Health Risks from Total Petroleum Hydrocarbons (TPH). Department of Toxic Substances Control. Human and Ecological Risk Division (HERD). June 16.
California Environmental Protection Agency (Cal/EPA). 2009c. Johnson and Ettinger SG-
SCREEN Model, EPA Version 2.0, dated April 2003, as modified by DTSC February 4. California Environmental Protection Agency (Cal/EPA). 2009d. Arsenic Strategies,
Determination of Arsenic Remediation, Development of Arsenic Cleanup Goals. Department of Toxic Substances Control. January 16.
California Environmental Protection Agency (Cal/EPA). 2009e. Revised California Human
Health Screening Levels for Lead. Department of Toxic Substances Control. September. California Environmental Protection Agency (Cal/EPA). 2005. DTSC/HERD Human Health
Risk Assessment (HHRA) Note Number 1. Department of Toxic Substances Control (DTSC). October 27.
California Environmental Protection Agency (Cal/EPA). 1997. Selecting Inorganic
Constituents as Chemicals of Potential Concern at Risk Assessments at Hazardous Waste Site and Permitted Facilities. Sacramento, California. February.
California Environmental Protection Agency (Cal/EPA). 1994. Preliminary Endangerment
Assessment Guidance Manual. Department of Toxic Substances Control. January. California Environmental Protection Agency (Cal/EPA). 1993. Addendum to Chapter 7 of
DTSC Supplemental Guidance for Human Health Multimedia Risk Assessments of Hazardous Waste Sites and Permitted Facilities, Memorandum to Interested Parties
FINAL Human Health Risk Assessment June 2011 Former Lodi Manufactured Gas Plant Site
8-2 IRIS ENVIRONMENTAL
(Including Lead Spreadsheet Model Version 6). Department of Toxic Substances Control (DTSC). June 10.
ENVIRON Corporation, Iris Environmental, and ENV America (ENVIRON et al.). 2002.
Background Levels of Polycyclic Aromatic Hydrocarbons in Northern California Surface Soil. June 7.
Iris Environmental. 2010. Memorandum for Meeting with DTSC on November 11, 2010.
Follow up from September 29th, 2010 Health Risk Assessment Scoping Meeting: PG&E Former Lodi Manufactured Gas Plant Site. November 11.
Office of Environmental Health Hazard Assessment (OEHHA). 2007. Development of Health
Criteria for Schools Site Risk Assessment Pursuant to Health and Safety Code Section 901(g): Proposed Child-Specific Benchmark Change in Blood Lead Concentration for School Site Risk Assessment. Available at: http://www.oehha.ca.gov/public_info/public/kids/index.html
Stantec. 2010. Final Remedial Investigation Completion Report: Former Lodi Manufactured
Gas Plant, 712 South Sacramento Street, Lodi, California. June 20. Treadwell and Rollo. 2008. Report of Third Quarter 2007 Groundwater Monitoring. January 8. U.S. Environmental Protection Agency (USEPA). 2011. Integrated Risk Information System
(IRIS). http://www.epa.gov/iris/ U.S. Environmental Protection Agency (USEPA). 2010a. ProUCL Version 4.00.05 Technical
Guide (Draft). EPA/600/R-07/041. May. U.S. Environmental Protection Agency (USEPA). 2010b ProUCL Version 4.00.05 User Guide
(Draft). EPA/600/R-07/038. May. U.S. Environmental Protection Agency (USEPA). 2010c. USEPA Regional Screening Levels
for Chemical Contaminants at Superfund Sites, Nov 2010. Available at http://www.epa.gov/reg3hwmd/risk/human/rb-concentration_table/Generic_Tables/pdf/master_sl_table_run_NOV2010.pdf.
U.S. Environmental Protection Agency (USEPA). 2009. Risk Assessment Guidance for
Superfund. Volume 1: Human Health Evaluation Manual (Part F, Supplemental Guidance for Inhalation Risk Assessment). Final. OSWER Directive 9285.7-82. EPA-540-R1-070-002. January.
U.S. Environmental Protection Agency (USEPA). 2004a. User’s Guide for Evaluating
Subsurface Vapor Intrusion into Buildings. Office of Emergency and Remedial Response Washington, D.C. Revised February 22, 2004.
FINAL Human Health Risk Assessment June 2011 Former Lodi Manufactured Gas Plant Site
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U.S. Environmental Protection Agency (USEPA). 2004b. Preliminary Remediation Goals. Maintained online at http://www.epa.gov/region9/waste/sfund/prg/index.html.
U.S. Environmental Protection Agency (USEPA). 2003a. Memorandum: Human Health
Toxicity Values in Superfund Risk Assessment. OSWER Directive 9285.7-53. December 5.
U.S. Environmental Protection Agency (USEPA). 2003b. Recommendations of the Technical
Review Workgroup for Lead for an Approach to Assessing Risks Associated with Adult Exposures to Lead in Soil. EPA-540-R-03-001. January.
U.S. Environmental Protection Agency (USEPA). 2002a. Calculating Upper Confidence Limits
for Exposure Point Concentrations at Hazardous Waste Sites. Office of Emergency and Remedial Response. Washington, D.C. OSWER 9285.6-10. December.
U.S. Environmental Protection Agency (USEPA). 2002b. Supplemental Guidance for
Developing Soil Screening Levels for Superfund Sites. OSWER 9355.4-24. December. U.S. Environmental Protection Agency (USEPA). 1997. Health Effects Assessment Summary
Tables (HEAST) FY 1997 Update. Office of Solid Waste and Emergency Response. EPA 540-R-97-036. July.
U.S. Environmental Protection Agency (USEPA). 1996. Soil Screening Guidance: User’s
Guide. Office of Solid Waste and Emergency Response. EPA/540/R-96/018. April. U.S. Environmental Protection Agency (USEPA). 1991. Risk Assessment Guidance for
Superfund. Volume I: Human Health Evaluation Manual. Supplemental Guidance. Standard Default Exposure Factors. Office of Emergency and Remedial Response. March 25.
U.S. Environmental Protection Agency (USEPA). 1989a. Risk Assessment Guidance for
Superfund. Volume 1: Human Health Evaluation Manual (Part A). Interim Final. Office of Emergency and Remedial Response. EPA-540/1-89/002. Washington, D.C. December.
U.S. Environmental Protection Agency (USEPA). 1989b. Statistical Analysis of Ground-Water
Monitoring Data at RCRA Facilities. Interim Final Guidance. Office of Solid Waste. April.
FINAL Human Health Risk Assessment June 2011 Former Lodi Manufactured Gas Plant Site
IRIS ENVIRONMENTAL
TABLES
Detection Frequency
(Detections/ Samples
Analyzed)
Range of Detected Concentrations a
(mg/kg)
Arithmetic Mean
(mg/kg)
95% UCL of Planter
Concentrations b
(mg/kg)
Site-Specific Background
Detection Frequency
(Detections/ Samples
Analyzed)
Range of Site-Specific Background
Concentrations a
(mg/kg)
95% UCL of Site-Specific Background
Concentrations b
(mg/kg)
Included in Risk
Assessment c
Volatile Organic CompoundsBenzene 24 / 55 0.00077 - 0.13 0.022 0.014 -- -- -- YesEthylbenzene 1 / 55 0.061 0.017 NC -- -- -- YesToluene 15 / 55 0.00062 - 0.99 0.036 0.10 -- -- -- Yesm,p-Xylene 4 / 55 0.0010 - 0.39 0.024 NC -- -- -- Yeso-Xylene 2 / 55 0.00058 - 0.17 0.019 NC -- -- -- YesTotal Petroleum HydrocarbonsTPH as Diesel 50 / 55 5.8 - 6,500 986 1,902 -- -- -- YesTPH as Gasoline 7 / 55 0.028 - 330 6.5 17 -- -- -- YesTPH as Motor Oil 48 / 55 19 - 14,000 2,265 5,129 -- -- -- YesPolycyclic Aromatic Hydrocarbons1-Methylnaphthalene 6 / 37 0.065 - 0.55 0.48 0.18 -- -- -- Yes2-Methylnaphthalene 15 / 46 0.058 - 0.81 0.50 0.25 -- -- -- YesAcenaphthene 10 / 55 0.019 - 1.6 0.54 0.16 -- -- -- YesAcenaphthylene 27 / 55 0.026 - 20 2.3 3.0 -- -- -- YesAnthracene 19 / 55 0.027 - 13 1.3 1.8 -- -- -- YesBenzo(a)anthracene 43 / 55 0.013 - 83 7.6 16 -- -- -- YesBenzo(a)pyrene 46 / 55 0.028 - 110 13 45 -- -- -- YesBenzo(b)fluoranthene 46 / 55 0.023 - 180 15 56 -- -- -- YesBenzo(g,h,i)perylene 46 / 55 0.030 - 140 19 61 -- -- -- YesBenzo(k)fluoranthene 44 / 55 0.020 - 220 13 33 -- -- -- YesChrysene 46 / 55 0.016 - 95 10 35 -- -- -- YesDibenz(a,h)anthracene 22 / 55 0.020 - 13 1.6 2.1 -- -- -- YesFluoranthene 48 / 55 0.029 - 300 32 118 -- -- -- YesFluorene 13 / 55 0.040 - 10 0.84 0.97 -- -- -- Yes
TABLE 1
Former Lodi Manufactured Gas PlantEXPOSED SOILS (0-0.5 FEET BGS)
Lodi, California
SUMMARY OF CHEMICALS INCLUDED IN THE RISK ASSESSMENT:
Chemical
d
d
d
e
e
e
e
ee
Lodi_HRA_Tables Page 1 of 3 IRIS ENVIRONMENTAL
Detection Frequency
(Detections/ Samples
Analyzed)
Range of Detected Concentrations a
(mg/kg)
Arithmetic Mean
(mg/kg)
95% UCL of Planter
Concentrations b
(mg/kg)
Site-Specific Background
Detection Frequency
(Detections/ Samples
Analyzed)
Range of Site-Specific Background
Concentrations a
(mg/kg)
95% UCL of Site-Specific Background
Concentrations b
(mg/kg)
Included in Risk
Assessment c
TABLE 1
Former Lodi Manufactured Gas PlantEXPOSED SOILS (0-0.5 FEET BGS)
Lodi, California
SUMMARY OF CHEMICALS INCLUDED IN THE RISK ASSESSMENT:
ChemicalIndeno(1,2,3-cd)pyrene 46 / 55 0.029 - 100 15 48 -- -- -- YesNaphthalene 37 / 55 0.029 - 180 6.2 27 -- -- -- YesPhenanthrene 50 / 55 0.022 - 220 20 76 -- -- -- YesPyrene 49 / 55 0.027 - 340 37 133 -- -- -- Yes
Benzo(a)pyrene Equivalent 55 / 55 0.018 - 170 19 48 73 / 86 0.0027-2.81 0.4 YesInorganicsAmmonia (as N) 1 / 1 310 310 NC -- -- -- YesAntimony 11 / 50 0.54 - 50 2.4 7.7 0 / 12 ND NC YesArsenic 49 / 50 0.81 - 10 3.3 3.9 12 / 12 1.27 - 4.17 2.8 NoBarium 50 / 50 25 - 191 100 108 12 / 12 85.17 - 118 109 YesBeryllium 13 / 50 0.16 - 0.50 0.15 0.22 6 / 12 0.253 - 0.369 0.31 YesCadmium 5 / 50 0.17 - 0.74 0.28 0.56 2 / 12 0.505 - 0.638 NC YesChromium 50 / 50 2.7 - 59 12 18 12 / 12 6.28 - 12.4 10 YesCobalt 50 / 50 1.5 - 11 5.5 5.9 12 / 12 3.68 - 7.32 5.9 YesCopper 50 / 50 5.4 - 180 29 49 12 / 12 6.75 - 14.7 12 YesCyanide, Total 10 / 25 0.68 - 13 1.6 2.8 -- -- -- YesLead 51 / 51 2.8 - 24,800 766 1,291 12 / 12 2.79 - 22.6 22 YesMercury 16 / 50 0.0093 - 2.8 0.13 0.23 5 / 12 0.0858 - 0.144 0.12 YesMolybdenum 19 / 50 0.10 - 22 1.5 4.1 1 / 12 0.251 NC YesNickel 50 / 50 3.0 - 4,330 141 522 12 / 12 5.16 - 7.85 7.0 YesSelenium 0 / 50 ND NC NC 3 / 12 0.774 - 0.825 NC NoSilver 10 / 50 0.17 - 0.58 0.17 0.27 4 / 12 0.272 - 0.418 NC YesThallium 1 / 50 7.8 0.62 NC 0 / 12 ND NC Yes
Carcinogenic Polycyclic Aromatic Hydrocarbons
g
e
f
h
Lodi_HRA_Tables Page 2 of 3 IRIS ENVIRONMENTAL
Detection Frequency
(Detections/ Samples
Analyzed)
Range of Detected Concentrations a
(mg/kg)
Arithmetic Mean
(mg/kg)
95% UCL of Planter
Concentrations b
(mg/kg)
Site-Specific Background
Detection Frequency
(Detections/ Samples
Analyzed)
Range of Site-Specific Background
Concentrations a
(mg/kg)
95% UCL of Site-Specific Background
Concentrations b
(mg/kg)
Included in Risk
Assessment c
TABLE 1
Former Lodi Manufactured Gas PlantEXPOSED SOILS (0-0.5 FEET BGS)
Lodi, California
SUMMARY OF CHEMICALS INCLUDED IN THE RISK ASSESSMENT:
ChemicalVanadium 50 / 50 7.8 - 157 32 50 12 / 12 20.7 - 36.6 29 YesZinc 50 / 50 16 - 384 94 110 12 / 12 25.9 - 76.3 57 Yes
Notes:
a
b
c
d
e
f
g
h
Sources:California Environmental Protection Agency (Cal/EPA). 1994. Preliminary Endangerment Assessment Guidance Manual. Department of Toxic Substances Control (DTSC). January. United States Environmental Protection Agency (USEPA). 2010. ProUCL Version 4.00.05 User Guide (Draft). EPA/600/R-07/038. May.
The range of concentrations in exposed soils (0-0.5 feet below ground surface [bgs]) of the Site collected during the 2006 Surface Soil Sampling conducted by ENV America, 2008-2009 Remedial Investigation and 2010 Remedial Area Refinement Sampling was conducted by Stantec. Soil samples collected within 0-0.5 feet bgs depth interval at all sampling locations were included in the exposed soils dataset with the exception of samples from locations in the adjacent right-of-way (i.e. South Sacrament Street; SB-3, SB-4, SB-11, SB-12, SB-26 through SB-33, SB-47, and SB-58 through SB-61) . Corresponds to the 95% Upper Confidence Limit (UCL) of the mean calculated using USEPA (2010) ProUCL Statistical Program. Inorganics and carcinogenic PAHs were included in the risk assessment if either the maximum detected concentration or the 95% UCL is above maximum detected concentration or 95% UCL in the background data set, respectively. If the 95% UCL is greater than the maximum detected concentration, the maximum detected concentration is used for screening purposes in both the site and background datasets. All other chemicals (i.e., organics) were included in the risk assessment if they were ever detected in soil. Per Cal/EPA PEA guidance, lead is included regardless of background levels.TPH evaluated using detected individual related constituents.Carcinogenic polycyclic aromatic hydrocarbons (PAH). Benzo(a)pyrene equivalent concentration for carcinogenic PAH was calculated using the Potency Equivalency Factors, as recommended by Cal/EPA (1994).
ND =
NC =
Not detected.Not analyzed for.
Not calculated. In order for ProUCL 4.0 to reliably evaluate a specific data population (e.g., dataset of concentrations of a particular chemical measured at the site), the population must include at least eight results including at least five detections.
Represents the 95% UCL of the background PAH data set for Northern California used for risk management purposes.
-- =
Arsenic concentrations were determined to be ambient levels and therefore, arsenic was not included as a chemical of potential concern (COPC) in the risk assessment. See Attachment B for details of analysis.
Lodi_HRA_Tables Page 3 of 3 IRIS ENVIRONMENTAL
Detection Frequency
(Detections/ Samples
Analyzed)
Range of Detected Concentrations a
(mg/kg)
Arithmetic Mean
(mg/kg)
95% UCL of On-site
Concentrations b
(mg/kg)
Site-Specific Background
Detection Frequency
(Detections/ Samples
Analyzed)
Range of Site-Specific Background
Concentrations a
(mg/kg)
95% UCL of Site-Specific Background
Concentrations b
(mg/kg)
Included in Risk
Assessment c
Volatile Organic CompoundsBenzene 56 / 279 0.00033 - 2,700 9.7 71 -- -- -- YesEthylbenzene 4 / 279 0.0022 - 50 0.21 NC -- -- -- YesToluene 25 / 279 0.00062 - 0.99 0.93 0.041 -- -- -- Yesm,p-Xylene 8 / 279 0.00070 - 58 0.24 0.58 -- -- -- Yeso-Xylene 5 / 279 0.00058 - 19 0.095 0.20 -- -- -- YesTotal Petroleum HydrocarbonsTPH as Diesel 150 / 279 5.4 - 42,000 758 2,015 -- -- -- YesTPH as Gasoline 35 / 279 0.013 - 2,800 27 116 -- -- -- YesTPH as Motor Oil 133 / 279 19 - 35,000 1,377 2,421 -- -- -- YesPolycyclic Aromatic Hydrocarbons1-Methylnaphthalene 9 / 205 0.024 - 0.55 5.0 0.078 -- -- -- Yes2-Methylnaphthalene 23 / 214 0.021 - 1,000 7.2 34 -- -- -- YesAcenaphthene 30 / 279 0.015 - 12 3.9 0.36 -- -- -- YesAcenaphthylene 77 / 279 0.023 - 4,100 21 118 -- -- -- YesAnthracene 49 / 279 0.011 - 2,400 11 63 -- -- -- YesBenzo(a)anthracene 136 / 279 0.013 - 3,300 22 108 -- -- -- YesBenzo(a)pyrene 148 / 279 0.014 - 7,600 46 237 -- -- -- YesBenzo(b)fluoranthene 150 / 279 0.012 - 4,600 29 143 -- -- -- YesBenzo(g,h,i)perylene 166 / 279 0.011 - 11,000 58 316 -- -- -- YesBenzo(k)fluoranthene 136 / 279 0.020 - 4,700 28 145 -- -- -- YesChrysene 151 / 279 0.014 - 4,400 30 146 -- -- -- YesDibenz(a,h)anthracene 56 / 279 0.020 - 16 4.2 1.2 -- -- -- YesFluoranthene 167 / 279 0.016 - 20,000 119 617 -- -- -- YesFluorene 30 / 279 0.010 - 1,400 7.2 37 -- -- -- Yes
TABLE 2
Former Lodi Manufactured Gas PlantSOILS (0-10 FEET BGS)
Lodi, California
SUMMARY OF CHEMICALS INCLUDED IN THE RISK ASSESSMENT:
Chemical
d
d
d
e
e
e
e
ee
Lodi_HRA_Tables Page 1 of 3 IRIS ENVIRONMENTAL
Detection Frequency
(Detections/ Samples
Analyzed)
Range of Detected Concentrations a
(mg/kg)
Arithmetic Mean
(mg/kg)
95% UCL of On-site
Concentrations b
(mg/kg)
Site-Specific Background
Detection Frequency
(Detections/ Samples
Analyzed)
Range of Site-Specific Background
Concentrations a
(mg/kg)
95% UCL of Site-Specific Background
Concentrations b
(mg/kg)
Included in Risk
Assessment c
TABLE 2
Former Lodi Manufactured Gas PlantSOILS (0-10 FEET BGS)
Lodi, California
SUMMARY OF CHEMICALS INCLUDED IN THE RISK ASSESSMENT:
ChemicalIndeno(1,2,3-cd)pyrene 154 / 279 0.010 - 7,500 42 219 -- -- -- YesNaphthalene 110 / 279 0.016 - 23,000 93 608 -- -- -- YesPhenanthrene 155 / 279 0.012 - 13,000 90 452 -- -- -- YesPyrene 173 / 279 0.014 - 21,000 125 645 -- -- -- Yes
Benzo(a)pyrene Equivalent 279 / 279 0.0088 - 9,824 60 232 73 / 86 0.0027-2.81 0.4 YesInorganicsAmmonia (as N) 8 / 8 5.6 - 310 87 230 -- -- -- YesAntimony 19 / 243 0.54 - 50 0.91 1.9 0 / 12 ND NC YesArsenic 233 / 243 0.80 - 12 2.7 2.9 12 / 12 1.27 - 4.17 2.8 NoBarium 243 / 243 23 - 415 97 101 12 / 12 85.17 - 118 109 YesBeryllium 81 / 243 0.11 - 0.71 0.18 0.23 6 / 12 0.253 - 0.369 0.31 YesCadmium 9 / 243 0.17 - 3.4 0.28 0.57 2 / 12 0.505 - 0.638 NC YesChromium 243 / 243 1.5 - 59 8.9 9.5 12 / 12 6.28 - 12.4 10 YesCobalt 243 / 243 0.62 - 139 7.0 8.0 12 / 12 3.68 - 7.32 5.9 YesCopper 243 / 243 2.2 - 180 14 19 12 / 12 6.75 - 14.7 12 YesCyanide, Total 26 / 127 0.51 - 13 0.98 1.5 -- -- -- YesLead 244 / 244 1.1 - 24,800 184 631 12 / 12 2.79 - 22.6 22 YesMercury 30 / 243 0.0064 - 2.8 0.059 0.063 5 / 12 0.0858 - 0.144 0.12 YesMolybdenum 36 / 243 0.10 - 22 0.47 0.73 1 / 12 0.251 NC YesNickel 243 / 243 2.1 - 4,330 38 117 12 / 12 5.16 - 7.85 7.0 YesSelenium 0 / 243 ND NC NC 3 / 12 0.774 - 0.825 NC NoSilver 12 / 243 0.17 - 3.6 0.15 0.28 4 / 12 0.272 - 0.418 NC YesThallium 1 / 243 7.8 0.43 NC 0 / 12 ND NC YesVanadium 243 / 243 7.8 - 157 32 34 12 / 12 20.7 - 36.6 29 Yes
Carcinogenic Polycyclic Aromatic Hydrocarbons
g
e
f
h
Lodi_HRA_Tables Page 2 of 3 IRIS ENVIRONMENTAL
Detection Frequency
(Detections/ Samples
Analyzed)
Range of Detected Concentrations a
(mg/kg)
Arithmetic Mean
(mg/kg)
95% UCL of On-site
Concentrations b
(mg/kg)
Site-Specific Background
Detection Frequency
(Detections/ Samples
Analyzed)
Range of Site-Specific Background
Concentrations a
(mg/kg)
95% UCL of Site-Specific Background
Concentrations b
(mg/kg)
Included in Risk
Assessment c
TABLE 2
Former Lodi Manufactured Gas PlantSOILS (0-10 FEET BGS)
Lodi, California
SUMMARY OF CHEMICALS INCLUDED IN THE RISK ASSESSMENT:
ChemicalZinc 243 / 243 13 - 574 56 72 12 / 12 25.9 - 76.3 57 Yes
Notes:
a
b
c
d
e
f
g
h
Sources:California Environmental Protection Agency (Cal/EPA). 1994. Preliminary Endangerment Assessment Guidance Manual. Department of Toxic Substances Control (DTSC). January. United States Environmental Protection Agency (USEPA). 2010. ProUCL Version 4.00.05 User Guide (Draft). EPA/600/R-07/038. May.
Not detected.Not analyzed for.
Not calculated. In order for ProUCL 4.0 to reliably evaluate a specific data population (e.g., dataset of concentrations of a particular chemical measured at the site), the population must include at least eight results including at least five detections.
Represents the 95% UCL of the background PAH data set for Northern California used for risk management purposes.
-- =
NC =
Arsenic concentrations were determined to be ambient levels and therefore, arsenic was not included as a chemical of potential concern (COPC) in the risk assessment. See Attachment B for details of analysis.
ND =
The range of concentrations in soils (0-10 feet below ground surface [bgs]) of the Site collected during the 2006 Surface Soil Sampling conducted by ENV America, 2008-2009 Remedial Investigation and 2010 Remedial Area Refinement Sampling was conducted by Stantec. For purposes of remedial decision-making, the boundary of ‘Site’ will include: 1) Street to the west of the site (South Sacramento Street) and 2) 30-foot strip on Lodi Iron Works (LIW) property directly south of Site. As such, all data collected off-site in South Sacramento Street and on LIW property are included in the Site dataset used in the quantitative HRA.
Corresponds to the 95% Upper Confidence Limit (UCL) of the mean calculated using USEPA (2010) ProUCL Statistical Program. Inorganics and carcinogenic PAHs were included in the risk assessment if either the maximum detected concentration or the 95% UCL is above maximum detected concentration or 95% UCL in the background data set, respectively. If the 95% UCL is greater than the maximum detected concentration, the maximum detected concentration is used for screening purposes in both the site and background datasets. All other chemicals (i.e., organics) were included in the risk assessment if they were ever detected in soil. Per Cal/EPA PEA guidance, lead is included regardless of background levels.TPH evaluated using detected individual related constituents.Carcinogenic polycyclic aromatic hydrocarbons (PAH). Benzo(a)pyrene equivalent concentration for carcinogenic PAH was calculated using the Potency Equivalency Factors, as recommended by Cal/EPA (1994).
Lodi_HRA_Tables Page 3 of 3 IRIS ENVIRONMENTAL
On-site Detection Frequency(Detections/Samples
Analyzed)
Range of On-site Detected
Concentrations a
(µg/m3)
Included in Risk
Assessment b
Volatile Organic Compounds1,1-Difluoroethane 1 / 12 5 Yes1,2,4-Trimethylbenzene 12 / 12 11 - 240 Yes1,3,5-Trimethylbenzene 10 / 12 26 - 91 Yes2-Butanone (Methyl Ethyl Ketone) 10 / 12 3 - 8 Yes2-Hexanone 1 / 12 4 Yes4-Ethyltoluene 12 / 12 8 - 310 YesAcetone 12 / 12 18 - 260 YesBenzene 6 / 12 1 - 8 YesCarbon Disulfide 1 / 12 34 YesCumene 8 / 12 6 - 27 YesEthanol 2 / 12 3 - 16 YesEthylbenzene 11 / 12 4 - 690 YesFreon 11 3 / 12 1 - 2 YesFreon 12 2 / 12 1 - 1 YesHeptane 4 / 12 1 - 13 YesMethyl tert-butyl ether 6 / 12 1 - 14 YesNaphthalene 2 / 12 15 - 23 YesPropylbenzene 8 / 12 10 - 48 YesStyrene 1 / 12 5 YesTetrachloroethene 5 / 12 2 - 9 YesToluene 12 / 12 7 - 8,000 YesTotal Xylenes 12 / 12 20 - 3,490 YesTrichloroethene 2 / 12 2 - 6 Yes
Notes:
a
b
The range of Site soil gas concentrations collected during the 2008-2009 Remedial Investigation conducted by Stantec. All detected volatile organic compounds (VOCs) in soil gas were included in the risk assessment.
micrograms per liter.Not detected.
µg/L = ND =
Chemical
TABLE 3SUMMARY OF CHEMICALS INCLUDED IN THE RISK ASSESSMENT:
SOIL GASFormer Lodi Manufactured Gas Plant
Lodi, California
Lodi_HRA_Tables Page 1 of 1 IRIS ENVIRONMENTAL
ScenarioCurrent Populations Future Populations
Off-siteCommercial
Worker
Off-site Resident
Child
Off-siteResident
Adult
Off-siteResident,
Age-AdjustedAdult
On-site Resident
Child
On-site Resident
Adult
On-siteResident,
Age-AdjustedAdult
Inhalation of Soil Particulates Particulate Emission Factor a PEF 1.2E+09 1.2E+09 1.2E+09 1.2E+09 1.2E+09 1.2E+09 1.2E+09 m3/kg
Dermal Contact with Soil Surface Area b SA NA NA NA NA 2,900 5,700 5,700 cm2/day Adherence Factor c AF NA NA NA NA 0.2 0.07 0.07 mg/cm2
Absorption Factor-PAHs d ABS-PAH NA NA NA NA 0.15 0.15 0.15 unitless Absorption Factor-Metals d ABS-Met NA NA NA NA 0.01 0.01 0.01 unitless Absorption Factor-Arsenic d ABS-As NA NA NA NA 0.03 0.03 0.03 unitless Absorption Factor-Cadmium d ABS-Cd NA NA NA NA 0.001 0.001 0.001 unitless Absorption Factor-Mercury d ABS-Hg NA NA NA NA 0.1 0.1 0.1 unitless Absorption Factor-Organics d ABS-Org NA NA NA NA 0.1 0.1 0.1 unitless Conversion Factor CF NA NA NA NA 1.0E-06 1.0E-06 1.0E-06 kg/mg
Ingestion of Soil Ingestion Rate e IR NA NA NA NA 200 100 100 mg/day Conversion Factor CF NA NA NA NA 1.0E-06 1.0E-06 1.0E-06 kg/mg
Population-Specific Intake Parameters Exposure Time ET 8 NA NA NA NA NA NA hrs/dayTime Conversion Factor TCF 24 NA NA NA NA NA NA hrs/day Exposure Frequency f EF 250 350 350 350 350 350 350 days/yr Exposure Duration ED 25 6 30 24 6 30 24 yr Body Weight BW 70 15 70 70 15 70 70 kg Averaging Time-Carcinogens ATc 25,550 25,550 25,550 25,550 25,550 25,550 25,550 days Averaging Time-Noncarcinogens ATnc 9,125 2,190 10,950 NA 2,190 10,950 NA days
Notes:Not applicable; incomplete exposure pathway or parameter not applicable to exposure scenario.
a
b
c
d
e
TABLE 4EXPOSURE PARAMETERS
Former Lodi Manufactured Gas Plant
Ingestion rates recommended by Cal/EPA (2005) for residential populations.
NA =
Lodi, California
Exposure Parameter
Corresponds to the area of exposed skin in each respective population (Cal/EPA 2005).
Symbol Units
The particulate emission factor (PEF) is calculated using the equations found in the Soil Screening Guidance (USEPA 2002), with input parameters as found in Attachment D of this HRA.
Soil adherence factors recommended by Cal/EPA (2005) for respective populations. Dermal absorption factors for specific compound classes from Cal/EPA (1994).
g g ggi
Lodi_HRA_Tables Page 1 of 2 IRIS ENVIRONMENTAL
TABLE 4EXPOSURE PARAMETERS
Former Lodi Manufactured Gas PlantLodi, California
Notes:f
g
Sources:
For the residents, corresponds to 7 days/week for 50 weeks/year. For the commercial worker, corresponds to 5 days/week for 50 weeks/year.Per Cal/EPA guidance, cancer risks for future on-site residents are calculated using an age-adjusted approach to account for the higher exposures per body weight that occur during the childhood years. Accordingly, for carcinogenic effects, the evaluation assumes that the resident is a child for the first 6 years of exposure and an adult for the remaining 24 years. For noncarcinogenic hazards, the averaging time for the adult resident is 30 years.
California Environmental Protection Agency (Cal/EPA). 2005. DTSC/HERD Human Health Risk Assessment (HHRA) Note Number 1. Department of Toxic S b t C t l (DTSC) O t b 27U.S. Environmental Protection Agency (USEPA). 2002. Supplemental Guidance for Developing Soil Screening Levels for Superfund Sites. Office of Soild Waste and Emergency Response. Washington, DC, December.
California Environmental Protection Agency (Cal/EPA). 1994. Preliminary Endangerment Assessment Guidance Manual. Department of Toxic Substances
Lodi_HRA_Tables Page 2 of 2 IRIS ENVIRONMENTAL
Exposure Concentration: Vapor Inhalation
Noncancer
Cancer
where Ca = Csg x AC for soil gas to indoor air pathway where Ca = Csg x TF for soil gas to outdoor air pathway
Exposure Concentration: Soil Particulate Inhalation
Noncancer
Cancer
Chronic Daily Intake: Dermal Contact
Noncancer
Cancer
Lodi, California
TABLE 5EQUATIONS USED TO CALCULATE EXPOSURE CONCENTRATIONS AND CHRONIC DAILY INTAKES:
RESIDENTIAL SCENARIOFormer Lodi Manufactured Gas Plant
ATnc, adult
ECinhv, c =Ca x EF x EDadult
ATc
CDIderm, age adjusted, c =Cs x SAchild x AFchild x ABS x EF x EDchild x CF
BWchild x ATc
Cs x SAadult x AFadult x ABS x EF x EDadult, age adjusted x CF
ATc
BWadult x ATc
Cs x SAadult x AFadult x ABS x EF x EDadult x CF
BWadult x ATnc, adult
Cs x SAchild x AFchild x ABS x EF x EDchild x CF
BWchild x ATnc, child
ECinhp, nc =Cs x (1/PEF) x EF x EDadult
CDIderm, child, nc = CDIderm, adult =
ECinhv, nc =Ca x EF x EDadult
ATnc, adult
ECinhp, c =Cs x (1/PEF) x EF x EDadult
Lodi_HRA_Tables Page 1 of 2 IRIS ENVIRONMENTAL
Lodi, California
TABLE 5EQUATIONS USED TO CALCULATE EXPOSURE CONCENTRATIONS AND CHRONIC DAILY INTAKES:
RESIDENTIAL SCENARIOFormer Lodi Manufactured Gas Plant
Chronic Daily Intake: Soil Ingestion
Noncancer
Cancer
BWadult x ATc
Where:ABS = Absorption Factor [Unitless]AC = Soil Gas-to-Indoor Air Attenuation Coefficient [Unitless]AF = Soil to Skin Adherence Factor [mg/cm2]ATc = Averaging Time for Carcinogenic Compounds [days]ATnc = Averaging Time for Noncarcinogenic Compounds [days]BW = Body Weight [kg]Ca = Concentration of Chemical in Air [mg/m3]Cs = Concentration of Chemical in Soil [mg/kg]Csg = Concentration of Chemical in Soil Gas [mg/m3]
CDIderm = Chronic Daily Intake: Dermal Contact [mgchemical/kgbody weight-day]CDIing = Chronic Daily Intake: Ingestion [mgchemical/kgbody weight-day]
CF = Conversion Factor [kg/mg]ECinhp = Exposure Concentration: Soil Particulate Inhalation [mgchemical/m
3air]
ECinhv = Exposure Concentration: Vapor Inhalation [mgchemical/m3
air]ED = Exposure Duration [years]EF = Exposure Frequency [days/year]IR = Soil Ingestion Rate [mg/day]
PEF = Soil-to-Air Particulate Emission Factor [m3/kg ]SA = Surface Area of Exposed Skin [cm2/day]TF = Soil Gas-to-Air Transfer Factor [mg/m3]/[mg/m3]
CDIing, age adjusted, c =Cs x IRchild x CF x EF x EDchild Cs x IRadult x CF x EF x EDadult, age adjusted
BWchild x ATc
BWchild x ATnc, child BWadult x ATnc, adult
Cs x IRadult x CF x EF x EDadultCDIing, child, nc =
Cs x IRchild x CF x EF x EDchildCDIing, adult =
Lodi_HRA_Tables Page 2 of 2 IRIS ENVIRONMENTAL
Exposure Concentration: Vapor Inhalation
Noncancer
Cancer
where Ca = Csg x TF for soil gas to outdoor air pathway
Exposure Concentration: Soil Particulate Inhalation
Noncancer
Cancer
EQUATIONS USED TO CALCULATE EXPOSURE CONCENTRATIONS AND CHRONIC DAILY INTAKES:COMMERCIAL WORKER SCENARIO
Former Lodi Manufactured Gas Plant
TABLE 6
ECinhp, worker, c =Cs x (1/PEF) x ET x (1/TCF) x EF x EDworker
ATc
ATnc, worker
ECinhp, worker, nc =Cs x (1/PEF) x ET x 1/(TCF) x EF x EDworker
ECinhv, worker, c =Ca x ET x (1/TCF) x EF x EDworker
ATc
ECinhv, worker, nc =Ca x ET x (1/TCF) x EF x EDworker
ATnc, worker
Lodi, California
Lodi_HRA_Tables Page 1 of 2 IRIS ENVIRONMENTAL
EQUATIONS USED TO CALCULATE EXPOSURE CONCENTRATIONS AND CHRONIC DAILY INTAKES:COMMERCIAL WORKER SCENARIO
Former Lodi Manufactured Gas Plant
TABLE 6
Lodi, California
Where:ATc = Averaging Time for Carcinogenic Compounds [days]ATnc = Averaging Time for Noncarcinogenic Compounds [days]
Ca = Concentration of Chemical in Air [mg/m3]Cs = Concentration of Chemical in Soil [mg/kg]Csg = Concentration of Chemical in Soil Gas [mg/m3]
ECinhp = Exposure Concentration: Soil Particulate Inhalation [mgchemical/m3
air]ECinhv = Exposure Concentration: Vapor Inhalation [mgchemical/m
3air]
ED = Exposure Duration [years]EF = Exposure Frequency [days/year]ET = Exposure Time [hours/day]
PEF = Soil-to-Air Particulate Emission Factor [m3/kg ]TCF = Time Conversion Factor [hours/day]TF = Soil Gas-to-Air Transfer Factor [mg/m3]/[mg/m3]
worker = commercial worker
Lodi_HRA_Tables Page 2 of 2 IRIS ENVIRONMENTAL
Off-site Commercial Worker Off-site Resident
ExposurePoint
Concentrationfor Soil
Particulate Emissions
Factor (PEF)
OutdoorAirborne
Particulate Concentration
ExposurePoint
Concentrationfor Soil
Particulate Emissions
Factor (PEF)
OutdoorAirborne
Particulate Concentration
(mg/kg) a (m3/kg) (mg/m3) b (mg/kg) a (m3/kg) (mg/m3) b
Volatile Organic CompoundsBenzene 1.4E-02 1.2E+09 1.2E-11 1.4E-02 1.2E+09 1.2E-11Ethylbenzene 6.1E-02 1.2E+09 5.1E-11 6.1E-02 1.2E+09 5.1E-11Toluene 1.0E-01 1.2E+09 8.4E-11 1.0E-01 1.2E+09 8.4E-11m,p-Xylene 3.9E-01 1.2E+09 3.3E-10 3.9E-01 1.2E+09 3.3E-10o-Xylene 1.7E-01 1.2E+09 1.4E-10 1.7E-01 1.2E+09 1.4E-10Polycyclic Aromatic Hydrocarbons1-Methylnaphthalene 1.8E-01 1.2E+09 1.5E-10 1.8E-01 1.2E+09 1.5E-102-Methylnaphthalene 2.5E-01 1.2E+09 2.1E-10 2.5E-01 1.2E+09 2.1E-10Acenaphthene 1.6E-01 1.2E+09 1.4E-10 1.6E-01 1.2E+09 1.4E-10Acenaphthylene 3.0E+00 1.2E+09 2.5E-09 3.0E+00 1.2E+09 2.5E-09Anthracene 1.8E+00 1.2E+09 1.5E-09 1.8E+00 1.2E+09 1.5E-09Benzo (a) anthracene 1.6E+01 1.2E+09 1.4E-08 1.6E+01 1.2E+09 1.4E-08Benzo (a) pyrene 4.5E+01 1.2E+09 3.7E-08 4.5E+01 1.2E+09 3.7E-08Benzo (b) fluoranthene 5.6E+01 1.2E+09 4.7E-08 5.6E+01 1.2E+09 4.7E-08Benzo (g,h,i) perylene 6.1E+01 1.2E+09 5.1E-08 6.1E+01 1.2E+09 5.1E-08Benzo (k) fluoranthene 3.3E+01 1.2E+09 2.7E-08 3.3E+01 1.2E+09 2.7E-08Chrysene 3.5E+01 1.2E+09 3.0E-08 3.5E+01 1.2E+09 3.0E-08Dibenz (a,h) Anthracene 2.1E+00 1.2E+09 1.8E-09 2.1E+00 1.2E+09 1.8E-09Fluoranthene 1.2E+02 1.2E+09 9.8E-08 1.2E+02 1.2E+09 9.8E-08Fluorene 9.7E-01 1.2E+09 8.1E-10 9.7E-01 1.2E+09 8.1E-10Indeno (1,2,3-c,d) pyrene 4.8E+01 1.2E+09 4.0E-08 4.8E+01 1.2E+09 4.0E-08
TABLE 7EXPOSURE POINT AND PREDICTED OUTDOOR AIR CONCENTRATIONS FOR
CHEMICALS OF POTENTIAL CONCERN IN EXPOSED SOILS:CURRENT OFF-SITE RESIDENTIAL AND COMMERCIAL SCENARIOS
Former Lodi Manufactured Gas PlantLodi, California
Chemical
Lodi_HRA_Tables Page 1 of 3 IRIS ENVIRONMENTAL
Off-site Commercial Worker Off-site Resident
ExposurePoint
Concentrationfor Soil
Particulate Emissions
Factor (PEF)
OutdoorAirborne
Particulate Concentration
ExposurePoint
Concentrationfor Soil
Particulate Emissions
Factor (PEF)
OutdoorAirborne
Particulate Concentration
(mg/kg) a (m3/kg) (mg/m3) b (mg/kg) a (m3/kg) (mg/m3) b
TABLE 7EXPOSURE POINT AND PREDICTED OUTDOOR AIR CONCENTRATIONS FOR
CHEMICALS OF POTENTIAL CONCERN IN EXPOSED SOILS:CURRENT OFF-SITE RESIDENTIAL AND COMMERCIAL SCENARIOS
Former Lodi Manufactured Gas PlantLodi, California
ChemicalNaphthalene 2.7E+01 1.2E+09 2.2E-08 2.7E+01 1.2E+09 2.2E-08Phenanthrene 7.6E+01 1.2E+09 6.3E-08 7.6E+01 1.2E+09 6.3E-08Pyrene 1.3E+02 1.2E+09 1.1E-07 1.3E+02 1.2E+09 1.1E-07
Benzo(a)pyrene Equivalent 4.8E+01 1.2E+09 4.0E-08 4.8E+01 1.2E+09 4.0E-08InorganicsAmmonia (as N) 3.1E+02 1.2E+09 2.6E-07 3.1E+02 1.2E+09 2.6E-07Antimony 7.7E+00 1.2E+09 6.4E-09 7.7E+00 1.2E+09 6.4E-09Barium 1.1E+02 1.2E+09 9.0E-08 1.1E+02 1.2E+09 9.0E-08Beryllium 2.2E-01 1.2E+09 1.8E-10 2.2E-01 1.2E+09 1.8E-10Cadmium 5.6E-01 1.2E+09 4.6E-10 5.6E-01 1.2E+09 4.6E-10Chromium 1.8E+01 1.2E+09 1.5E-08 1.8E+01 1.2E+09 1.5E-08Cobalt 5.9E+00 1.2E+09 5.0E-09 5.9E+00 1.2E+09 5.0E-09Copper 4.9E+01 1.2E+09 4.1E-08 4.9E+01 1.2E+09 4.1E-08Cyanide, Total 2.8E+00 1.2E+09 2.4E-09 2.8E+00 1.2E+09 2.4E-09Lead 1.3E+03 1.2E+09 1.1E-06 1.3E+03 1.2E+09 1.1E-06Mercury 2.3E-01 1.2E+09 1.9E-10 2.3E-01 1.2E+09 1.9E-10Molybdenum 4.1E+00 1.2E+09 3.4E-09 4.1E+00 1.2E+09 3.4E-09Nickel 5.2E+02 1.2E+09 4.4E-07 5.2E+02 1.2E+09 4.4E-07Silver 2.7E-01 1.2E+09 2.3E-10 2.7E-01 1.2E+09 2.3E-10Thallium 7.8E+00 1.2E+09 6.5E-09 7.8E+00 1.2E+09 6.5E-09
Carcinogenic Polycyclic Aromatic Hydrocarbons
Lodi_HRA_Tables Page 2 of 3 IRIS ENVIRONMENTAL
Off-site Commercial Worker Off-site Resident
ExposurePoint
Concentrationfor Soil
Particulate Emissions
Factor (PEF)
OutdoorAirborne
Particulate Concentration
ExposurePoint
Concentrationfor Soil
Particulate Emissions
Factor (PEF)
OutdoorAirborne
Particulate Concentration
(mg/kg) a (m3/kg) (mg/m3) b (mg/kg) a (m3/kg) (mg/m3) b
TABLE 7EXPOSURE POINT AND PREDICTED OUTDOOR AIR CONCENTRATIONS FOR
CHEMICALS OF POTENTIAL CONCERN IN EXPOSED SOILS:CURRENT OFF-SITE RESIDENTIAL AND COMMERCIAL SCENARIOS
Former Lodi Manufactured Gas PlantLodi, California
ChemicalVanadium 5.0E+01 1.2E+09 4.2E-08 5.0E+01 1.2E+09 4.2E-08Zinc 1.1E+02 1.2E+09 9.2E-08 1.1E+02 1.2E+09 9.2E-08Notes:a
b
The exposure point concentrations (EPCs) for exposed soil (0-0.5 feet bgs) dataset are used for the evaluation of outdoor air particulates. Unless otherwise indicated, the 95% upper confidence limit of the arithmetic mean concentrations (95% UCLs) of exposed soil (0-0.5 feet bgs) dataset are used as the representative EPCs. Maximum detected concentrations are bolded and italized.Outdoor air particulate concentration is calculated by dividing the soil EPC by the PEF.
Lodi_HRA_Tables Page 3 of 3 IRIS ENVIRONMENTAL
On-site Resident
ExposurePoint
Concentrationfor On-site Soil
Particulate Emissions
Factor (PEF)
OutdoorAirborne
Particulate Concentration
(mg/kg) a (m3/kg) (mg/m3) b
Volatile Organic CompoundsBenzene 7.1E+01 1.2E+09 5.9E-08Ethylbenzene 5.0E+01 1.2E+09 4.2E-08Toluene 4.1E-02 1.2E+09 3.4E-11m,p-Xylene 5.8E-01 1.2E+09 4.8E-10o-Xylene 2.0E-01 1.2E+09 1.6E-10Polycyclic Aromatic Hydrocarbons1-Methylnaphthalene 7.8E-02 1.2E+09 6.5E-112-Methylnaphthalene 3.4E+01 1.2E+09 2.9E-08Acenaphthene 3.6E-01 1.2E+09 3.0E-10Acenaphthylene 1.2E+02 1.2E+09 9.8E-08Anthracene 6.3E+01 1.2E+09 5.3E-08Benzo (a) anthracene 1.1E+02 1.2E+09 9.0E-08Benzo (a) pyrene 2.4E+02 1.2E+09 2.0E-07Benzo (b) fluoranthene 1.4E+02 1.2E+09 1.2E-07Benzo (g,h,i) perylene 3.2E+02 1.2E+09 2.6E-07Benzo (k) fluoranthene 1.4E+02 1.2E+09 1.2E-07Chrysene 1.5E+02 1.2E+09 1.2E-07Dibenz (a,h) Anthracene 1.2E+00 1.2E+09 9.6E-10Fluoranthene 6.2E+02 1.2E+09 5.1E-07Fluorene 3.7E+01 1.2E+09 3.1E-08Indeno (1,2,3-c,d) pyrene 2.2E+02 1.2E+09 1.8E-07Naphthalene 6.1E+02 1.2E+09 5.1E-07Phenanthrene 4.5E+02 1.2E+09 3.8E-07Pyrene 6.5E+02 1.2E+09 5.4E-07
Benzo(a)pyrene Equivalent 2.3E+02 1.2E+09 1.9E-07InorganicsAmmonia (as N) 2.3E+02 1.2E+09 1.9E-07Antimony 1.9E+00 1.2E+09 1.6E-09Barium 1.0E+02 1.2E+09 8.4E-08Beryllium 2.3E-01 1.2E+09 1.9E-10Cadmium 5.7E-01 1.2E+09 4.8E-10Chromium 9.5E+00 1.2E+09 8.0E-09Cobalt 8.0E+00 1.2E+09 6.6E-09Copper 1.9E+01 1.2E+09 1.6E-08Cyanide, Total 1.5E+00 1.2E+09 1.3E-09Lead 6.3E+02 1.2E+09 5.3E-07Mercury 6.3E-02 1.2E+09 5.3E-11Molybdenum 7.3E-01 1.2E+09 6.1E-10Nickel 1.2E+02 1.2E+09 9.7E-08Silver 2.8E-01 1.2E+09 2.3E-10Thallium 7.8E+00 1.2E+09 6.5E-09
Carcinogenic Polycyclic Aromatic Hydrocarbons
TABLE 8EXPOSURE POINT AND PREDICTED OUTDOOR AIR CONCENTRATIONS FOR
CHEMICALS OF POTENTIAL CONCERN IN SOILS:FUTURE ON-SITE RESIDENTIAL SCENARIO
Former Lodi Manufactured Gas PlantLodi, California
Chemical
Lodi_HRA_Tables Page 1 of 2 IRIS ENVIRONMENTAL
On-site Resident
ExposurePoint
Concentrationfor On-site Soil
Particulate Emissions
Factor (PEF)
OutdoorAirborne
Particulate Concentration
(mg/kg) a (m3/kg) (mg/m3) b
TABLE 8EXPOSURE POINT AND PREDICTED OUTDOOR AIR CONCENTRATIONS FOR
CHEMICALS OF POTENTIAL CONCERN IN SOILS:FUTURE ON-SITE RESIDENTIAL SCENARIO
Former Lodi Manufactured Gas PlantLodi, California
ChemicalVanadium 3.4E+01 1.2E+09 2.8E-08Zinc 7.2E+01 1.2E+09 6.0E-08
Notes:a
b
The exposure point concentrations (EPCs) for on-site soil (0-10 feet bgs) dataset are used for the evaluation of direct contact exposure pathways (i.e., ingestion and dermal contact) and inhalation of outdoor air particulates. Unless otherwise indicated, the 95% upper confidence limit of the arithmetic mean concentrations (95% UCLs) of on-site soil (0-10 feet bgs) dataset are used as the representative EPCs. Maximum detected concentrations are bolded and italized.Outdoor air particulate concentration is calculated by dividing the soil EPC by the PEF.
Lodi_HRA_Tables Page 2 of 2 IRIS ENVIRONMENTAL
VOC? a
Diffusivity in air, Da
(cm2/s)
Henry's Law Constant at Reference
Temperature (25° C),
H (atm-m3/mol)
Organic Carbon
Partition Coefficient,
Koc
(cm3/g)
Pure Component Water Solubility,
S (mg/L)
Soil SaturationConcentration,Csat , calculated
(mg/kg)Volatile Organic Compounds1,1-Difluoroethane Y 1.0E-01 2 1.2E-05 2 2.0E-02 2 8.3E-01 2 3.2E+01 2 3.2E+03 2 4.6E+03 3 1.4E+031,2,4-Trimethylbenzene Y 6.1E-02 1 7.9E-06 1 6.1E-03 1 2.5E-01 1 1.4E+03 1 5.7E+01 1 2.4E+00 2 4.7E+021,3,5-Trimethylbenzene Y 6.0E-02 1 8.7E-06 1 5.9E-03 1 2.4E-01 1 1.4E+03 1 2.0E+00 1 3.3E+00 2 1.7E+012-Butanone (Methyl Ethyl Ketone) Y 8.1E-02 1 9.8E-06 1 5.6E-05 1 2.3E-03 1 2.3E+00 1 2.2E+05 1 3.8E+01 1 2.5E+042-Hexanone Y 7.0E-02 2 8.4E-06 2 9.3E-05 2 3.8E-03 2 1.5E+01 2 1.7E+04 2 9.1E+01 3 3.3E+034-Ethyltoluene Y 6.8E-02 3 7.8E-06 4 5.0E-03 3 2.1E-01 3 1.8E+03 3 9.5E+01 3 3.0E+00 3 1.0E+03Acetone Y 1.2E-01 1 1.1E-05 1 3.9E-05 1 1.6E-03 1 5.8E-01 1 1.0E+06 1 5.1E+02 1 1.0E+05Benzene Y 8.8E-02 1 9.8E-06 1 5.5E-03 1 2.3E-01 1 5.9E+01 1 1.8E+03 1 9.5E+01 1 8.8E+02Carbon Disulfide Y 1.0E-01 1 1.0E-05 1 3.0E-02 1 1.2E+00 1 4.6E+01 1 1.2E+03 1 3.6E+02 1 7.1E+02Cumene Y 6.5E-02 1 7.1E-06 1 1.2E+00 1 4.7E+01 1 4.9E+02 1 6.1E+01 1 3.8E+02 1 6.9E+02Ethanol Y 1.2E-01 3 1.3E-05 4 5.0E-06 3 2.1E-04 3 1.9E-01 3 1.0E+06 3 5.9E+01 3 1.0E+05Ethylbenzene Y 7.5E-02 1 7.8E-06 1 7.9E-03 1 3.2E-01 1 3.6E+02 1 1.7E+02 1 9.5E+00 1 3.9E+02Freon 11 Y 8.7E-02 1 9.7E-06 1 9.7E-02 1 4.0E+00 1 5.0E+02 1 1.1E+03 1 5.4E+02 2 4.2E+03Freon 12 Y 6.7E-02 1 9.9E-06 1 3.4E-01 1 1.4E+01 1 4.6E+02 1 2.8E+02 1 1.8E+02 2 1.5E+03Heptane Y 7.0E-02 3 7.6E-06 4 2.0E+00 3 8.2E+01 3 1.9E+04 3 3.4E+00 3 4.6E+01 3 4.5E+02Methyl tert-butyl ether Y 1.0E-01 1 1.1E-05 1 6.2E-04 1 2.6E-02 1 7.3E+00 1 5.1E+04 1 2.4E+02 1 7.6E+03Naphthalene Y 5.9E-02 1 7.5E-06 1 4.8E-04 1 2.0E-02 1 2.0E+03 1 3.1E+01 1 8.9E-02 1 3.8E+02Propylbenzene Y 6.0E-02 1 7.8E-06 1 1.1E-02 1 4.4E-01 1 5.6E+02 1 6.0E+01 1 3.4E+00 3 2.1E+02Styrene Y 7.1E-02 1 8.0E-06 1 2.7E-03 1 1.1E-01 1 7.8E+02 1 3.1E+02 1 6.2E+00 1 1.5E+03Tetrachloroethene Y 7.2E-02 1 8.2E-06 1 1.8E-02 1 7.5E-01 1 1.6E+02 1 2.0E+02 1 1.7E+01 1 2.3E+02Toluene Y 8.7E-02 1 8.6E-06 1 6.6E-03 1 2.7E-01 1 1.8E+02 1 5.3E+02 1 2.9E+01 1 6.5E+02Trichloroethene Y 7.9E-02 1 9.1E-06 1 1.0E-02 1 4.2E-01 1 1.7E+02 1 1.5E+03 1 6.6E+01 1 1.7E+03m,p-Xylene Y 7.7E-02 1 8.4E-06 1 7.6E-03 1 3.1E-01 1 3.9E+02 1 1.9E+02 1 1.0E+01 1 4.6E+02o-Xylene Y 8.7E-02 1 1.0E-05 1 5.2E-03 1 2.1E-01 1 3.6E+02 1 1.8E+02 1 6.6E+00 1 4.1E+02Total Xylenes Y 8.5E-02 2 9.9E-06 2 5.2E-03 2 2.1E-01 2 3.8E+02 2 1.1E+02 2 6.6E+00 2 2.6E+02Polycyclic Aromatic Hydrocarbons1-Methylnaphthalene Y 5.3E-02 2 7.8E-06 2 5.1E-04 3 2.1E-02 2 2.5E+03 2 2.6E+01 2 6.7E-02 3 3.9E+022-Methylnaphthalene Y 5.2E-02 1 7.8E-06 1 5.2E-04 1 2.1E-02 1 2.8E+03 1 2.5E+01 1 6.8E-02 3 4.2E+02Acenaphthene Y 4.2E-02 1 7.7E-06 1 1.5E-04 1 6.3E-03 1 7.1E+03 1 3.6E+00 1 2.7E-03 1 1.5E+02Acenaphthylene N NA NA 1.1E-04 3 4.7E-03 3 3.6E+03 3 1.6E+01 3 9.1E-04 3 NAAnthracene N NA NA 5.6E-05 3 2.3E-03 2 2.0E+04 2 4.3E-02 2 2.7E-06 2 NA
TABLE 9CHEMICAL PROPERTIES FOR CHEMICALS OF POTENTIAL CONCERN
Former Lodi Manufactured Gas PlantLodi, California
Chemical
Vapor Pressure, VP
(mmHg)
Diffusivity in water,
Dw
(cm2/s)
Dimensionless Henry's Law Constant at Reference
Temperature (25° C),
H'(unitless)
Lodi_HRA_Tables Page 1 of 3 IRIS ENVIRONMENTAL
VOC? a
Diffusivity in air, Da
(cm2/s)
Henry's Law Constant at Reference
Temperature (25° C),
H (atm-m3/mol)
Organic Carbon
Partition Coefficient,
Koc
(cm3/g)
Pure Component Water Solubility,
S (mg/L)
Soil SaturationConcentration,Csat , calculated
(mg/kg)
TABLE 9CHEMICAL PROPERTIES FOR CHEMICALS OF POTENTIAL CONCERN
Former Lodi Manufactured Gas PlantLodi, California
Chemical
Vapor Pressure, VP
(mmHg)
Diffusivity in water,
Dw
(cm2/s)
Dimensionless Henry's Law Constant at Reference
Temperature (25° C),
H'(unitless)
Benzo (a) anthracene N NA NA 1.2E-05 3 4.9E-04 2 1.8E+05 2 9.4E-03 2 1.9E-06 3 NABenzo (a) pyrene N NA NA 4.6E-07 2 1.9E-05 2 5.9E+05 2 1.6E-03 2 5.5E-09 3 NABenzo (b) fluoranthene N NA NA 1.1E-04 1 4.5E-03 1 1.2E+06 1 1.5E-03 1 5.0E-07 1 NABenzo (g,h,i) perylene N NA NA 3.3E-07 3 1.4E-05 3 1.9E+06 3 2.6E-04 3 2.4E-10 3 NABenzo (k) fluoranthene N NA NA 5.8E-07 3 2.4E-05 2 5.9E+05 2 8.0E-04 2 9.7E+10 3 NAChrysene N NA NA 9.4E-05 1 3.9E-03 1 4.0E+05 1 6.3E-03 1 2.0E-06 1 NADibenz (a,h) Anthracene N NA NA 1.4E-07 2 5.8E-06 2 1.9E+06 2 2.5E-03 2 1.0E-10 3 NAFluoranthene N NA NA 8.9E-06 3 3.6E-04 2 5.5E+04 2 2.6E-01 2 8.7E-06 3 NAFluorene N NA NA 6.3E-05 1 2.6E-03 1 1.4E+04 1 2.0E+00 1 5.7E-04 1 NAIndeno (1,2,3-c,d) pyrene N NA NA 3.5E-07 1 1.4E-05 2 2.0E+06 2 1.9E-04 2 3.5E-07 3 NANaphthalene Y 5.9E-02 1 7.5E-06 1 4.8E-04 1 2.0E-02 1 2.0E+03 1 3.1E+01 1 8.9E-02 1 3.8E+02Phenanthrene N NA NA 4.2E-05 3 1.7E-03 3 1.2E+04 3 1.2E+00 3 1.1E-04 3 NAPyrene N NA NA 1.1E-05 1 4.5E-04 1 1.1E+05 1 1.4E+00 1 5.6E-05 1 NACarcinogenic Polycyclic Aromatic HydrocarbonsBenzo(a)pyrene Equivalent N NA NA 4.6E-07 2 1.9E-05 2 5.9E+05 2 1.6E-03 2 5.5E-09 3 NAInorganicsAmmonia (as N) N NA NA 1.6E-05 3 NA 6.5E-01 3 NA NA NAAntimony N NA NA NA NA NA NA NA NABarium N NA NA NA NA NA NA NA NABeryllium N NA NA NA NA NA NA NA NACadmium N NA NA NA NA NA NA NA NAChromium N NA NA NA NA NA NA NA NACobalt N NA NA NA NA NA NA NA NACopper N NA NA NA NA NA NA NA NACyanide, Total N NA NA NA NA NA NA NA NALead N NA NA NA NA NA NA NA NAMercury N NA NA NA NA NA NA NA NAMolybdenum N NA NA NA NA NA NA NA NANickel N NA NA NA NA NA NA NA NASelenium N NA NA NA NA NA NA NA NASilver N NA NA NA NA NA NA NA NAThallium N NA NA NA NA NA NA NA NA
b
Lodi_HRA_Tables Page 2 of 3 IRIS ENVIRONMENTAL
VOC? a
Diffusivity in air, Da
(cm2/s)
Henry's Law Constant at Reference
Temperature (25° C),
H (atm-m3/mol)
Organic Carbon
Partition Coefficient,
Koc
(cm3/g)
Pure Component Water Solubility,
S (mg/L)
Soil SaturationConcentration,Csat , calculated
(mg/kg)
TABLE 9CHEMICAL PROPERTIES FOR CHEMICALS OF POTENTIAL CONCERN
Former Lodi Manufactured Gas PlantLodi, California
Chemical
Vapor Pressure, VP
(mmHg)
Diffusivity in water,
Dw
(cm2/s)
Dimensionless Henry's Law Constant at Reference
Temperature (25° C),
H'(unitless)
Vanadium N NA NA NA NA NA NA NA NAZinc N NA NA NA NA NA NA NA NA
Notes:Not applicable.
a
b
References:
1.
2.
3.
4.5.
Benzo(a)pyrene values used as surrogate.
United States Environmental Protection Agency (USEPA). 2010. From USEPA Regional Screening Levels for Chemical Contaminants at Superfund Sites, November, 2010. Available at: http://www.epa.gov/reg3hwmd/risk/human/rb-concentration_table/Generic_Tables/pdf/composite_sl_table_run_NOV2010.pdf.
California Environmental Protection Department (Cal/EPA). 2005. Department of Toxic Substances Control (DTSC). Human and Ecological Risk Division (HERD). Johnson and Ettinger screening-level soil gas model contained in Excel spreadsheet “HERD_Soil_Gas_Screening_Model_2005.xls”.
USEPA. 2006. Water9, Version 3. June 29. URL: http://www.epa.gov/ttn/chief/software/water/water9_3.California Environmental Protection Agency (Cal/EPA). 1994. Preliminary Endangerment Assessment Guidance Manual. Department of Toxic Substances Control. January.
NA = VOC = Volatile organic compound. Consistent with Cal/EPA guidance, volatile chemicals are defined as having a Henry's Law Constant [atm-m 3/mol] greater than 1 x 10-5 and a vapor pressure greater than 1x10-3 (Cal/EPA 1994).
SRC PhysProp Database. 2003. found at http://esc.syrres.com/interkow/physdemo.htm and methods from Schwarzenback R. P. et al. 1993. Environmental Organic Chemistry. John Wiley and Sons, Inc., New York, NY.
Lodi_HRA_Tables Page 3 of 3 IRIS ENVIRONMENTAL
(mg/m3)-1 (mg/kg-day)-1
Inhalation Source Oral Source Inhalation Source Oral Source
Volatile Organic Compounds1,1-Difluoroethane NC 1 NC 1 4.0E+01 4 NA NA1,2,4-Trimethylbenzene NC 1 NC 1 7.0E-03 2 5.0E-02 31,3,5-Trimethylbenzene NC 1 NC 1 6.0E-03 3a 1.0E-02 22-Butanone (Methyl Ethyl Ketone) NC 1 NC 1 5.0E+00 4 6.0E-01 42-Hexanone NC 1 NC 1 3.0E-02 4 5.0E-03 44-Ethyltoluene NC 1 NC 1 1.0E-01 4b 2.0E-01 4bAcetone NC 1 NC 1 3.1E+01 6 9.0E-01 4Benzene 2.9E-02 1 1.0E-01 1 3.0E-02 4 4.0E-03 4Carbon Disulfide NC 1 NC 1 7.0E-01 4 1.0E-01 4Cumene NC 1 NC 1 4.0E-01 4 1.0E-01 4Ethanol NC 1 NC 1 1.1E+00 4a 3.0E-01 4cEthylbenzene 2.5E-03 1 1.1E-02 1 1.0E+00 4 1.0E-01 4Freon 11 NC 1 NC 1 7.0E-01 5 3.0E-01 4Freon 12 NC 1 NC 1 2.0E-01 5 2.0E-01 4Heptane NC 1 NC 1 7.0E-01 4d 6.0E-02 5dMethyl tert-butyl ether 2.6E-04 1 1.8E-03 1 3.0E+00 4 8.6E-01 4aNaphthalene 3.4E-02 1 1.2E-01 1a 3.0E-03 4 2.0E-02 4Propylbenzene NC 1 NC 1 1.0E+00 6 1.0E-01 6Styrene NC 1 NC 1 9.0E-01 1 2.0E-01 4Tetrachloroethene 5.9E-03 1 5.4E-01 1 3.5E-02 1 1.0E-02 4Toluene NC 1 NC 1 3.0E-01 1 8.0E-02 4Trichloroethene 2.0E-03 1 5.9E-03 1 6.0E-01 1 3.0E-04 7m,p-Xylene NC 1 NC 1 1.0E-01 4 2.0E-01 4o-Xylene NC 1 NC 1 1.0E-01 4 2.0E-01 4Total Xylenes NC 1 NC 1 1.0E-01 4 2.0E-01 4Polycyclic Aromatic Hydrocarbons1-Methylnaphthalene NC 1 2.9E-02 1 1.4E-02 4a 4.0E-03 4e2-Methylnaphthalene NC 1 NC 1 1.4E-02 4a 4.0E-03 4Acenaphthene NC 1 NC 1 2.1E-01 4a 6.0E-02 4Acenaphthylene NC 1 NC 1 2.1E-01 4f 6.0E-02 4fAnthracene NC 1 NC 1 1.1E+00 4a 3.0E-01 4Benzo (a) anthracene na 1 na 1 1.1E-01 4g 3.0E-02 4gBenzo (a) pyrene na 1 na 1 1.1E-01 4g 3.0E-02 4gBenzo (b) fluoranthene na 1 na 1 1.1E-01 4g 3.0E-02 4gBenzo (g,h,i) perylene NC 1 NC 1 1.1E-01 4g 3.0E-02 4gBenzo (k) fluoranthene na 1 na 1 1.1E-01 4g 3.0E-02 4gChrysene na 1 na 1 1.1E-01 4g 3.0E-02 4gDibenz (a,h) Anthracene na 1 na 1 1.1E-01 4g 3.0E-02 4gFluoranthene NC 1 NC 1 1.4E-01 4a 4.0E-02 4Fluorene NC 1 NC 1 1.4E-01 4a 4.0E-02 4Indeno (1,2,3-c,d) pyrene na 1 na 1 1.1E-01 4g 3.0E-02 4gNaphthalene 3.4E-02 1 1.2E-01 1a 3.0E-03 4 2.0E-02 4Phenanthrene NC 1 NC 1 1.1E+00 4h 3.0E-01 4hPyrene NC 1 NC 1 1.1E-01 4a 3.0E-02 4
Benzo(a)pyrene Equivalent 1.1E+00 1 1.2E+01 1 NA na NA naInorganicsAmmonia (as N) NC 1 NC 1 1.0E-01 4 2.0E-01 4iAntimony NC 1 NC 1 1.4E-03 4a 4.0E-04 4Barium NC 1 NC 1 5.0E-04 5 2.0E-01 4Beryllium 2.4E+00 1 NC j 7.0E-06 1 2.0E-04 1
TABLE 10CARCINOGENIC AND NONCARCINOGENIC TOXICITY VALUES FOR CHEMICALS OF POTENTIAL CONCERN
Former Lodi Manufactured Gas Plant
(mg/kg-day)
Chronic Noncancer Reference Concentration
(RfC) (mg/m3)
Carcinogenic Polycyclic Aromatic Hydrocarbons
Chemical
Lodi, California
Unit Risk Factor (URF)
Cancer Slope Factor (CSF)
Chronic Noncancer Reference Dose
(RfD)
Lodi_HRA_Tables Page 1 of 2 IRIS ENVIRONMENTAL
(mg/m3)-1 (mg/kg-day)-1
Inhalation Source Oral Source Inhalation Source Oral Source
TABLE 10CARCINOGENIC AND NONCARCINOGENIC TOXICITY VALUES FOR CHEMICALS OF POTENTIAL CONCERN
Former Lodi Manufactured Gas Plant
(mg/kg-day)
Chronic Noncancer Reference Concentration
(RfC) (mg/m3)
Chemical
Lodi, California
Unit Risk Factor (URF)
Cancer Slope Factor (CSF)
Chronic Noncancer Reference Dose
(RfD)
Cadmium 4.2E+00 1 NC j 2.0E-05 1 5.0E-04 1Chromium NC 1k NC 1k 5.3E+00 4a,k 1.5E+00 4kCobalt 9.0E+00 2 NC 1 6.0E-06 2 3.0E-04 2Copper NC 1 NC 1 1.4E-01 5a 4.0E-02 5lCyanide, Total NC 1 NC 1 8.0E-04 4a 6.0E-04 4Lead NA m NA m NA m NA mMercury NC 1 NC 1 3.0E-05 1 1.6E-04 1Molybdenum NC 1 NC 1 1.8E-02 4a 5.0E-03 4Nickel 2.6E-01 1 NC j 5.0E-05 1 2.0E-02 4Silver NC 1 NC 1 1.8E-02 4a 5.0E-03 4Thallium NC 1 NC 1 2.3E-04 4n 6.6E-05 4nVanadium NC 1 NC 1 1.8E-02 6a 5.0E-03 6Zinc NC 1 NC 1 1.1E+00 4a 3.0E-01 4
1 1 03Notes:
a
b
c
d
e
f
g
h
i
j
k
l
m
n
Sources:1.
2.
3.
4.
5.
6.
7.
NA =
Surrogate value - assumes toxicity for xylenes.Route-to-route extrapolation.
NC = na =
Not available or not applicable.Not considered to be a carcinogen.Carcinogenic PAHs (CPAHs) evalauted using benzo(a)pyrene equivalency method.
The RfD for copper is based on drinking water standard of 1.3 mg/L.
Surrogate value - assumes toxicity for n-hexane.Surrogate value - assumes toxicity for 2-methylnaphthalene.
Surrogate value - assumes toxicity for ammonia sulfamate.Surrogate value - assumes toxicity for anthracene.
This chemical is not considered a carcinogen by the route of ingestion.
United States Environmental Protection Agency (USEPA). 2011. Integrated Risk Information System Database. Maintained at http://www.epa.gov/iris/index.html.
United States Environmental Protection Agency (USEPA) 2004. Region IX Preliminary Remediation Goals. November. Found at http://www.epa.gov/region9/superfund/prg/files/04prgtable.pdf
Value withdrawn from USEPA IRIS database on September 30, 2009.
Toxicity values for Chromium (III).
Lead exposure is evaluated using Cal/EPA OEHHA's benchmark approach. See text for details.
United States Environmental Protection Agency (USEPA). 2010. From USEPA Regional Screening Levels for Chemical Contaminants at Superfund Sites , Nov, 2010. Available at: http://www.epa.gov/reg3hwmd/risk/human/rb-concentration_table/Generic_Tables/pdf/composite_sl_table_run_NOV2010.pdfNCEA. National Center for Environmental Assessment from Region IX PRG table.
United States Environmental Protection Agency (USEPA). 1997. Health Effects Assessment Summary Tables. FY 1997 Update. July. Office of Environmental Health Hazard Assessment (OEHHA).
California Environmental Protection Agency (Cal/EPA), Office of Environmental Health Hazard Assessment (OEHHA). 2011. Table of cancer slope factors maintained at http://www.oehha.ca.gov/risk/pdf/tcdb072109alpha.pdf (dated 7/21/09); table of chronic RELs maintained online at http://www.oehha.ca.gov/air/allrels.html.Superfund Health Risk Technical Support Center (STSC). 2010. STSC's Provisional Peer Reviewed Toxicity Values (PPRTV) from USEPA Regional Screening Levels for Chemical Contaminants at Superfund Sites , Novemeber, 2010.
Surrogate value - assumes toxicity for butanol.
Surrogate value - assumes toxicity for acenaphthene.Because the USEPA has not developed an RfD for this chemical, the noncancer RfD for pyrene is used as a surrogate value.
Lodi_HRA_Tables Page 2 of 2 IRIS ENVIRONMENTAL
Off-site Commercial Worker
Off-site Resident, Age-Adjusted
Soil Pathway
EC:Particulate Inhalation
(mg/m3)
EC:Particulate Inhalation
(mg/m3)
Volatile Organic CompoundsBenzene 9.6E-13 4.8E-12Ethylbenzene 4.1E-12 2.1E-11Toluene NC NCm,p-Xylene NC NCo-Xylene NC NCPolycyclic Aromatic Hydrocarbons1-Methylnaphthalene NC NC2-Methylnaphthalene NC NCAcenaphthene NC NCAcenaphthylene NC NCAnthracene NC NCBenzo (a) anthracene NA NABenzo (a) pyrene NA NABenzo (b) fluoranthene NA NABenzo (g,h,i) perylene NC NCBenzo (k) fluoranthene NA NAChrysene NA NADibenz (a,h) Anthracene NA NAFluoranthene NC NCFluorene NC NCIndeno (1,2,3-c,d) pyrene NA NANaphthalene 1.8E-09 9.2E-09Phenanthrene NC NCPyrene NC NC
Benzo(a)pyrene Equivalent 3.2E-09 1.6E-08InorganicsAmmonia (as N) NC NCAntimony NC NCBarium NC NCBeryllium 1.5E-11 7.4E-11Cadmium 3.8E-11 1.9E-10Chromium NC NCCobalt 4.0E-10 2.0E-09Copper NC NCCyanide, Total NC NC
Carcinogenic Polycyclic Aromatic Hydrocarbons
ChemicalSoil Pathway
EXPOSURE CONCENTRATION AND CHRONIC DAILY INTAKES FOR TABLE 11
CARCINOGENS IN EXPOSED SOILS:CURRENT OFF-SITE RESIDENTIAL AND COMMERCIAL SCENARIOS
Former Lodi Manufactured Gas PlantLodi, California
Lodi_HRA_Tables Page 1 of 2 IRIS ENVIRONMENTAL
Off-site Commercial Worker
Off-site Resident, Age-Adjusted
Soil Pathway
EC:Particulate Inhalation
(mg/m3)
EC:Particulate Inhalation
(mg/m3)
ChemicalSoil Pathway
EXPOSURE CONCENTRATION AND CHRONIC DAILY INTAKES FOR TABLE 11
CARCINOGENS IN EXPOSED SOILS:CURRENT OFF-SITE RESIDENTIAL AND COMMERCIAL SCENARIOS
Former Lodi Manufactured Gas PlantLodi, California
Lead NA NAMercury NC NCMolybdenum NC NCNickel 3.5E-08 1.8E-07Silver NC NCThallium NC NCVanadium NC NCZinc NC NC
Notes:
NC =
Chronic Daily Intake.Exposure ConcentrationNot applicable. Carcinogenic PAHs are evaluated using benzo(a)pyrene equivalents, and potential exposure to lead is evaluated using Cal/EPA OEHHA's CHHSL for lead. Please see Not considered a carcinogen.
CDI = EC = NA =
Lodi_HRA_Tables Page 2 of 2 IRIS ENVIRONMENTAL
Off-site Commercial Worker
Off-site Resident Child
Off-site Resident Adult
Soil Pathway
EC:Particulate Inhalation
(mg/m3)
EC:Particulate Inhalation
(mg/m3)
EC:Particulate Inhalation
(mg/m3)
Volatile Organic CompoundsBenzene 2.7E-12 1.1E-11 1.1E-11Ethylbenzene 1.2E-11 4.9E-11 4.9E-11Toluene 1.9E-11 8.1E-11 8.1E-11m,p-Xylene 7.4E-11 3.1E-10 3.1E-10o-Xylene 3.2E-11 1.4E-10 1.4E-10Polycyclic Aromatic Hydrocarbons1-Methylnaphthalene 3.4E-11 1.4E-10 1.4E-102-Methylnaphthalene 4.7E-11 2.0E-10 2.0E-10Acenaphthene 3.1E-11 1.3E-10 1.3E-10Acenaphthylene 5.7E-10 2.4E-09 2.4E-09Anthracene 3.4E-10 1.4E-09 1.4E-09Benzo (a) anthracene 3.1E-09 1.3E-08 1.3E-08Benzo (a) pyrene 8.5E-09 3.6E-08 3.6E-08Benzo (b) fluoranthene 1.1E-08 4.5E-08 4.5E-08Benzo (g,h,i) perylene 1.2E-08 4.9E-08 4.9E-08Benzo (k) fluoranthene 6.2E-09 2.6E-08 2.6E-08Chrysene 6.8E-09 2.8E-08 2.8E-08Dibenz (a,h) Anthracene 4.1E-10 1.7E-09 1.7E-09Fluoranthene 2.2E-08 9.4E-08 9.4E-08Fluorene 1.8E-10 7.7E-10 7.7E-10Indeno (1,2,3-c,d) pyrene 9.1E-09 3.8E-08 3.8E-08Naphthalene 5.1E-09 2.1E-08 2.1E-08Phenanthrene 1.4E-08 6.1E-08 6.1E-08Pyrene 2.5E-08 1.1E-07 1.1E-07InorganicsAmmonia (as N) 5.9E-08 2.5E-07 2.5E-07Antimony 1.5E-09 6.1E-09 6.1E-09Barium 2.1E-08 8.6E-08 8.6E-08Beryllium 4.1E-11 1.7E-10 1.7E-10Cadmium 1.1E-10 4.5E-10 4.5E-10Chromium 3.5E-09 1.5E-08 1.5E-08Cobalt 1.1E-09 4.8E-09 4.8E-09Copper 9.3E-09 3.9E-08 3.9E-08Cyanide, Total 5.4E-10 2.3E-09 2.3E-09
NONCARCINOGENS IN EXPOSED SOILS:
Lodi, California
TABLE 12EXPOSURE CONCENTRATION AND CHRONIC DAILY INTAKES FOR
CURRENT OFF-SITE RESIDENTIAL AND COMMERCIAL SCENARIOSFormer Lodi Manufactured Gas Plant
Soil Pathway Soil PathwayChemical
Lodi_HRA_Tables Page 1 of 2 IRIS ENVIRONMENTAL
Off-site Commercial Worker
Off-site Resident Child
Off-site Resident Adult
Soil Pathway
EC:Particulate Inhalation
(mg/m3)
EC:Particulate Inhalation
(mg/m3)
EC:Particulate Inhalation
(mg/m3)
NONCARCINOGENS IN EXPOSED SOILS:
Lodi, California
TABLE 12EXPOSURE CONCENTRATION AND CHRONIC DAILY INTAKES FOR
CURRENT OFF-SITE RESIDENTIAL AND COMMERCIAL SCENARIOSFormer Lodi Manufactured Gas Plant
Soil Pathway Soil PathwayChemical
Lead NA NA NAMercury 4.4E-11 1.9E-10 1.9E-10Molybdenum 7.7E-10 3.2E-09 3.2E-09Nickel 9.9E-08 4.2E-07 4.2E-07Silver 5.2E-11 2.2E-10 2.2E-10Thallium 1.5E-09 6.2E-09 6.2E-09Vanadium 9.5E-09 4.0E-08 4.0E-08Zinc 2.1E-08 8.8E-08 8.8E-08
Notes:CDI = EC = NA =
Chronic Daily Intake.Exposure ConcentrationNot applicable. Potential exposure to lead is evaluated using Cal/EPA OEHHA's CHHSL for lead. Please see text for discussion.
Lodi_HRA_Tables Page 2 of 2 IRIS ENVIRONMENTAL
On-site Resident, Age-Adjusted
EC:Particulate Inhalation
(mg/m3)
CDI:Dermal Contact
(mg/kg-day)
CDI:Ingestion
(mg/kg-day)
Volatile Organic CompoundsBenzene 2.4E-08 3.6E-05 1.1E-04Ethylbenzene 1.7E-08 2.5E-05 7.8E-05Toluene NC NC NCm,p-Xylene NC NC NCo-Xylene NC NC NCPolycyclic Aromatic Hydrocarbons1-Methylnaphthalene NC 3.9E-08 1.2E-072-Methylnaphthalene NC NC NCAcenaphthene NC NC NCAcenaphthylene NC NC NCAnthracene NC NC NCBenzo (a) anthracene NA NA NABenzo (a) pyrene NA NA NABenzo (b) fluoranthene NA NA NABenzo (g,h,i) perylene NC NC NCBenzo (k) fluoranthene NA NA NAChrysene NA NA NADibenz (a,h) Anthracene NA NA NAFluoranthene NC NC NCFluorene NC NC NCIndeno (1,2,3-c,d) pyrene NA NA NANaphthalene 2.1E-07 4.6E-04 9.5E-04Phenanthrene NC NC NCPyrene NC NC NC
Benzo(a)pyrene Equivalent 7.9E-08 1.8E-04 3.6E-04InorganicsAmmonia (as N) NC NC NCAntimony NC NC NCBarium NC NC NCBeryllium 8.0E-11 NC NCCadmium 2.0E-10 NC NCChromium NC NC NCCobalt 2.7E-09 NC NCCopper NC NC NCCyanide, Total NC NC NC
ChemicalSoil Pathway
EXPOSURE CONCENTRATION AND CHRONIC DAILY INTAKES FOR TABLE 13
CARCINOGENS IN SOILS:FUTURE ON-SITE RESIDENTIAL SCENARIO
Former Lodi Manufactured Gas PlantLodi, California
Carcinogenic Polycyclic Aromatic Hydrocarbons
Lodi_HRA_Tables Page 1 of 2 IRIS ENVIRONMENTAL
On-site Resident, Age-Adjusted
EC:Particulate Inhalation
(mg/m3)
CDI:Dermal Contact
(mg/kg-day)
CDI:Ingestion
(mg/kg-day)
ChemicalSoil Pathway
EXPOSURE CONCENTRATION AND CHRONIC DAILY INTAKES FOR TABLE 13
CARCINOGENS IN SOILS:FUTURE ON-SITE RESIDENTIAL SCENARIO
Former Lodi Manufactured Gas PlantLodi, California
Lead NA NA NAMercury NC NC NCMolybdenum NC NC NCNickel 4.0E-08 NC NCSilver NC NC NCThallium NC NC NCVanadium NC NC NCZinc NC NC NC
Notes:
NC =
Chronic Daily Intake.Exposure ConcentrationNot applicable. Carcinogenic PAHs are evaluated using benzo(a)pyrene equivalents, and potential exposure to lead is evaluated using Cal/EPA OEHHA's CHHSL for lead. Please see text for discussion.Not considered a carcinogen.
CDI = EC = NA =
Lodi_HRA_Tables Page 2 of 2 IRIS ENVIRONMENTAL
On-site Resident Child On-site Resident Adult
EC:Particulate Inhalation(mg/m3)
CDI:Dermal Contact
(mg/kg-day)
CDI:Ingestion
(mg/kg-day)
EC:Particulate Inhalation(mg/m3)
CDI:Dermal Contact
(mg/kg-day)
CDI:Ingestion
(mg/kg-day)
Volatile Organic CompoundsBenzene 5.6E-08 2.6E-04 9.0E-04 5.6E-08 3.9E-05 9.7E-05Ethylbenzene 4.0E-08 1.9E-04 6.4E-04 4.0E-08 2.7E-05 6.8E-05Toluene 3.2E-11 1.5E-07 5.2E-07 3.2E-11 2.2E-08 5.5E-08m,p-Xylene 4.6E-10 2.2E-06 7.4E-06 4.6E-10 3.2E-07 7.9E-07o-Xylene 1.6E-10 7.3E-07 2.5E-06 1.6E-10 1.1E-07 2.7E-07Polycyclic Aromatic Hydrocarbons1-Methylnaphthalene 6.2E-11 2.9E-07 1.0E-06 6.2E-11 4.3E-08 1.1E-072-Methylnaphthalene 2.8E-08 1.3E-04 4.4E-04 2.8E-08 1.9E-05 4.7E-05Acenaphthene 2.8E-10 2.0E-06 4.6E-06 2.8E-10 2.9E-07 4.9E-07Acenaphthylene 9.4E-08 6.6E-04 1.5E-03 9.4E-08 9.7E-05 1.6E-04Anthracene 5.1E-08 3.5E-04 8.1E-04 5.1E-08 5.2E-05 8.7E-05Benzo (a) anthracene 8.6E-08 6.0E-04 1.4E-03 8.6E-08 8.9E-05 1.5E-04Benzo (a) pyrene 1.9E-07 1.3E-03 3.0E-03 1.9E-07 1.9E-04 3.3E-04Benzo (b) fluoranthene 1.1E-07 8.0E-04 1.8E-03 1.1E-07 1.2E-04 2.0E-04Benzo (g,h,i) perylene 2.5E-07 1.8E-03 4.0E-03 2.5E-07 2.6E-04 4.3E-04Benzo (k) fluoranthene 1.2E-07 8.0E-04 1.8E-03 1.2E-07 1.2E-04 2.0E-04Chrysene 1.2E-07 8.1E-04 1.9E-03 1.2E-07 1.2E-04 2.0E-04Dibenz (a,h) Anthracene 9.2E-10 6.4E-06 1.5E-05 9.2E-10 9.4E-07 1.6E-06Fluoranthene 4.9E-07 3.4E-03 7.9E-03 4.9E-07 5.1E-04 8.5E-04Fluorene 3.0E-08 2.1E-04 4.7E-04 3.0E-08 3.0E-05 5.1E-05Indeno (1,2,3-c,d) pyrene 1.8E-07 1.2E-03 2.8E-03 1.8E-07 1.8E-04 3.0E-04Naphthalene 4.9E-07 3.4E-03 7.8E-03 4.9E-07 5.0E-04 8.3E-04Phenanthrene 3.6E-07 2.5E-03 5.8E-03 3.6E-07 3.7E-04 6.2E-04Pyrene 5.2E-07 3.6E-03 8.2E-03 5.2E-07 5.3E-04 8.8E-04InorganicsAmmonia (as N) 1.8E-07 8.5E-04 2.9E-03 1.8E-07 1.3E-04 3.2E-04Antimony 1.5E-09 7.0E-07 2.4E-05 1.5E-09 1.0E-07 2.6E-06Barium 8.1E-08 3.8E-05 1.3E-03 8.1E-08 5.5E-06 1.4E-04Beryllium 1.9E-10 8.6E-08 3.0E-06 1.9E-10 1.3E-08 3.2E-07Cadmium 4.6E-10 2.1E-08 7.3E-06 4.6E-10 3.1E-09 7.9E-07Chromium 7.6E-09 3.5E-06 1.2E-04 7.6E-09 5.2E-07 1.3E-05Cobalt 6.4E-09 3.0E-06 1.0E-04 6.4E-09 4.4E-07 1.1E-05Copper 1.5E-08 7.1E-06 2.5E-04 1.5E-08 1.1E-06 2.6E-05Cyanide, Total 1.2E-09 5.6E-06 1.9E-05 1.2E-09 8.3E-07 2.1E-06
Lodi, California
TABLE 14EXPOSURE CONCENTRATION AND CHRONIC DAILY INTAKES FOR NONCARCINOGENS IN SOILS:
FUTURE ON-SITE RESIDENTIAL SCENARIOFormer Lodi Manufactured Gas Plant
Soil Pathway Soil PathwayChemical
Lodi_HRA_Tables Page 1 of 2 IRIS ENVIRONMENTAL
On-site Resident Child On-site Resident Adult
EC:Particulate Inhalation(mg/m3)
CDI:Dermal Contact
(mg/kg-day)
CDI:Ingestion
(mg/kg-day)
EC:Particulate Inhalation(mg/m3)
CDI:Dermal Contact
(mg/kg-day)
CDI:Ingestion
(mg/kg-day)
Lodi, California
TABLE 14EXPOSURE CONCENTRATION AND CHRONIC DAILY INTAKES FOR NONCARCINOGENS IN SOILS:
FUTURE ON-SITE RESIDENTIAL SCENARIOFormer Lodi Manufactured Gas Plant
Soil Pathway Soil PathwayChemical
Lead NA NA NA NA NA NAMercury 5.1E-11 2.3E-08 8.1E-07 5.1E-11 3.5E-09 8.7E-08Molybdenum 5.9E-10 2.7E-07 9.4E-06 5.9E-10 4.0E-08 1.0E-06Nickel 9.3E-08 4.3E-05 1.5E-03 9.3E-08 6.4E-06 1.6E-04Silver 2.2E-10 1.0E-07 3.6E-06 2.2E-10 1.5E-08 3.8E-07Thallium 6.2E-09 2.9E-06 1.0E-04 6.2E-09 4.3E-07 1.1E-05Vanadium 2.7E-08 1.3E-05 4.4E-04 2.7E-08 1.9E-06 4.7E-05Zinc 5.7E-08 2.7E-05 9.2E-04 5.7E-08 3.9E-06 9.8E-05
Notes:CDI = EC = NA =
Chronic Daily Intake.Exposure ConcentrationNot applicable. Toxicity values for thallium has been withdrawn by USEPA. Potential exposure to lead is evaluated using Cal/EPA OEHHA's CHHSL for lead. Please see text for discussion.
Lodi_HRA_Tables Page 2 of 2 IRIS ENVIRONMENTAL
Off-site Commercial Worker
Off-site Resident, Age-Adjusted
Particulate Inhalation
Total Cancer Risk
Particulate Inhalation
Total Cancer Risk
Volatile Organic CompoundsBenzene 2.8E-14 2.8E-14 1.4E-13 1.4E-13Ethylbenzene 1.0E-14 1.0E-14 5.2E-14 5.2E-14Toluene NC NC NC NCm,p-Xylene NC NC NC NCo-Xylene NC NC NC NCPolycyclic Aromatic Hydrocarbons1-Methylnaphthalene NC NC NC NC2-Methylnaphthalene NC NC NC NCAcenaphthene NC NC NC NCAcenaphthylene NC NC NC NCAnthracene NC NC NC NCBenzo (a) anthracene NA NA NA NABenzo (a) pyrene NA NA NA NABenzo (b) fluoranthene NA NA NA NABenzo (g,h,i) perylene NC NC NC NCBenzo (k) fluoranthene NA NA NA NAChrysene NA NA NA NADibenz (a,h) Anthracene NA NA NA NAFluoranthene NC NC NC NCFluorene NC NC NC NCIndeno (1,2,3-c,d) pyrene NA NA NA NANaphthalene 6.2E-11 6.2E-11 3.1E-10 3.1E-10Phenanthrene NC NC NC NCPyrene NC NC NC NCCarcinogenic Polycyclic Aromatic HydrocarbonsBenzo(a)pyrene Equivalent 3.6E-09 3.6E-09 1.8E-08 1.8E-08InorganicsAntimony NC NC NC NCBarium NC NC NC NCBeryllium 3.5E-11 3.5E-11 1.8E-10 1.8E-10Cadmium 1.6E-10 1.6E-10 8.0E-10 8.0E-10Chromium NC NC NC NCCobalt 3.6E-09 3.6E-09 1.8E-08 1.8E-08Copper NC NC NC NCCyanide, Total NC NC NC NC
Chemical
Lodi, California
TABLE 15CANCER RISK FROM EXPOSED SOILS:
CURRENT OFF-SITE RESIDENTIAL AND COMMERCIAL SCENARIOSFormer Lodi Manufactured Gas Plant
Soil Pathway Soil Pathway
Lodi_HRA_Tables Page 1 of 2 IRIS ENVIRONMENTAL
Off-site Commercial Worker
Off-site Resident, Age-Adjusted
Particulate Inhalation
Total Cancer Risk
Particulate Inhalation
Total Cancer Risk
Chemical
Lodi, California
TABLE 15CANCER RISK FROM EXPOSED SOILS:
CURRENT OFF-SITE RESIDENTIAL AND COMMERCIAL SCENARIOSFormer Lodi Manufactured Gas Plant
Soil Pathway Soil Pathway
Lead NA NA NA NAMercury NC NC NC NCMolybdenum NC NC NC NCNickel 9.2E-09 9.2E-09 4.6E-08 4.6E-08Selenium NC NC NC NCSilver NC NC NC NCThallium NC NC NC NCVanadium NC NC NC NCZinc NC NC NC NCTotal Cancer Risk 1.7E-08 1.7E-08 8.4E-08 8.4E-08
Notes:
NC = Not considered a carcinogen.
NA = Not applicable. Cancer risks not calculated for chemicals not considered a carcinogen. Carcinogenic PAHs are evaluated using benzo(a)pyrene equivalents, and potential exposure to lead is evaluated using OEHHA's CHHSL for lead. Please see text for discussion.
Lodi_HRA_Tables Page 2 of 2 IRIS ENVIRONMENTAL
Off-site Commercial Worker
Off-site Resident Child
Off-site Resident Adult
Particulate Inhalation
Total Hazard Index
Particulate Inhalation
Total Hazard Index
Particulate Inhalation
Total Hazard Index
Volatile Organic CompoundsBenzene 8.9E-11 8.9E-11 3.8E-10 3.8E-10 3.8E-10 3.8E-10Ethylbenzene 1.2E-11 1.2E-11 4.9E-11 4.9E-11 4.9E-11 4.9E-11Toluene 6.4E-11 6.4E-11 2.7E-10 2.7E-10 2.7E-10 2.7E-10m,p-Xylene 7.4E-10 7.4E-10 3.1E-09 3.1E-09 3.1E-09 3.1E-09o-Xylene 3.2E-10 3.2E-10 1.4E-09 1.4E-09 1.4E-09 1.4E-09Polycyclic Aromatic Hydrocarbons1-Methylnaphthalene 2.4E-09 2.4E-09 1.0E-08 1.0E-08 1.0E-08 1.0E-082-Methylnaphthalene 3.4E-09 3.4E-09 1.4E-08 1.4E-08 1.4E-08 1.4E-08Acenaphthene 1.5E-10 1.5E-10 6.2E-10 6.2E-10 6.2E-10 6.2E-10Acenaphthylene 2.7E-09 2.7E-09 1.1E-08 1.1E-08 1.1E-08 1.1E-08Anthracene 3.2E-10 3.2E-10 1.3E-09 1.3E-09 1.3E-09 1.3E-09Benzo (a) anthracene 2.9E-08 2.9E-08 1.2E-07 1.2E-07 1.2E-07 1.2E-07Benzo (a) pyrene 8.1E-08 8.1E-08 3.4E-07 3.4E-07 3.4E-07 3.4E-07Benzo (b) fluoranthene 1.0E-07 1.0E-07 4.3E-07 4.3E-07 4.3E-07 4.3E-07Benzo (g,h,i) perylene 1.1E-07 1.1E-07 4.6E-07 4.6E-07 4.6E-07 4.6E-07Benzo (k) fluoranthene 5.9E-08 5.9E-08 2.5E-07 2.5E-07 2.5E-07 2.5E-07Chrysene 6.4E-08 6.4E-08 2.7E-07 2.7E-07 2.7E-07 2.7E-07Dibenz (a,h) Anthracene 3.9E-09 3.9E-09 1.6E-08 1.6E-08 1.6E-08 1.6E-08Fluoranthene 1.6E-07 1.6E-07 6.7E-07 6.7E-07 6.7E-07 6.7E-07Fluorene 1.3E-09 1.3E-09 5.5E-09 5.5E-09 5.5E-09 5.5E-09Indeno (1,2,3-c,d) pyrene 8.7E-08 8.7E-08 3.6E-07 3.6E-07 3.6E-07 3.6E-07Naphthalene 1.7E-06 1.7E-06 7.1E-06 7.1E-06 7.1E-06 7.1E-06Phenanthrene 1.4E-08 1.4E-08 5.8E-08 5.8E-08 5.8E-08 5.8E-08Pyrene 2.4E-07 2.4E-07 1.0E-06 1.0E-06 1.0E-06 1.0E-06InorganicsAntimony 1.0E-06 1.0E-06 4.4E-06 4.4E-06 4.4E-06 4.4E-06Barium 4.1E-05 4.1E-05 1.7E-04 1.7E-04 1.7E-04 1.7E-04Beryllium 5.8E-06 5.8E-06 2.5E-05 2.5E-05 2.5E-05 2.5E-05Cadmium 5.3E-06 5.3E-06 2.2E-05 2.2E-05 2.2E-05 2.2E-05Chromium 6.6E-10 6.6E-10 2.8E-09 2.8E-09 2.8E-09 2.8E-09Cobalt 1.9E-04 1.9E-04 7.9E-04 7.9E-04 7.9E-04 7.9E-04Copper 6.6E-08 6.6E-08 2.8E-07 2.8E-07 2.8E-07 2.8E-07Cyanide, Total 6.7E-07 6.7E-07 2.8E-06 2.8E-06 2.8E-06 2.8E-06
TABLE 16NONCANCER HAZARD INDICES FROM EXPOSED SOILS:
CURRENT OFF-SITE RESIDENTIAL AND COMMERCIAL SCENARIOSFormer Lodi Manufactured Gas Plant
Lodi, California
Soil Pathway Soil Pathway Soil PathwayChemical
Lodi_HRA_Tables Page 1 of 2 IRIS ENVIRONMENTAL
Off-site Commercial Worker
Off-site Resident Child
Off-site Resident Adult
Particulate Inhalation
Total Hazard Index
Particulate Inhalation
Total Hazard Index
Particulate Inhalation
Total Hazard Index
TABLE 16NONCANCER HAZARD INDICES FROM EXPOSED SOILS:
CURRENT OFF-SITE RESIDENTIAL AND COMMERCIAL SCENARIOSFormer Lodi Manufactured Gas Plant
Lodi, California
Soil Pathway Soil Pathway Soil PathwayChemical
Lead NA NA NA NA NA NAMercury 1.5E-06 1.5E-06 6.2E-06 6.2E-06 6.2E-06 6.2E-06Molybdenum 4.4E-08 4.4E-08 1.9E-07 1.9E-07 1.9E-07 1.9E-07Nickel 2.0E-03 2.0E-03 8.3E-03 8.3E-03 8.3E-03 8.3E-03Silver 3.0E-09 3.0E-09 1.2E-08 1.2E-08 1.2E-08 1.2E-08Thallium 6.4E-06 6.4E-06 2.7E-05 2.7E-05 2.7E-05 2.7E-05Vanadium 5.5E-07 5.5E-07 2.3E-06 2.3E-06 2.3E-06 2.3E-06Zinc 2.0E-08 2.0E-08 8.4E-08 8.4E-08 8.4E-08 8.4E-08Total Hazard Index 2.2E-03 2.2E-03 9.4E-03 9.4E-03 9.4E-03 9.4E-03
Notes:NA = Not applicable. Potential exposure to lead is evaluated using OEHHA's CHHSL for lead. Please see text for discussion.
Lodi_HRA_Tables Page 2 of 2 IRIS ENVIRONMENTAL
TABLE 17RISK EVALUATION FOR LEAD IN EXPOSED SOILS:
CURRENT OFF-SITE RESIDENTIAL SCENARIOFormer Lodi Manufactured Gas Plant
Lodi, California
USER'S GUIDE to version 7
INPUT OUTPUT
MEDIUM LEVEL PRG-99 PRG-90Lead in Air (ug/m3) 0 50th 90th 95th 98th 99th (ug/g) (ug/g)
Lead in Soil/Dust (ug/g) 1,291 BLOOD Pb, ADULT 0.0 0.0 0.0 0.0 0.0 135977 188065Lead in Water (ug/l) 0 BLOOD Pb, CHILD 0.0025 0.0046 0.0 0.0 0.0 170804 279523% Home-grown Produce 0% BLOOD Pb, PICA CHILD 0.0025 0.0046 0.0 0.0 0.0 170804 279523Respirable Dust (ug/m3) 1.5 BLOOD Pb, OCCUPATIONAL 0.0 0.0 0.0 0.0 0.0 190368 263291
units adults childrenDays per week days/wk
Days per week, occupational 5 PEF ug/dl percent PEF ug/dl percentGeometric Standard Deviation Soil Contact 0.0E+0 0.00 0% 0.0E+0 0.00 0%Blood lead level of concern (ug/dl) Soil Ingestion 0.0E+0 0.00 0% 0.0E+0 0.00 0%Skin area, residential cm2 0 0 Inhalation, bkgrnd 0.00 0% 0.00 0%Skin area occupational cm2 0 Inhalation 2.5E-6 0.00 100% 1.8E-6 0.00 100%Soil adherence ug/cm2 70 200 Water Ingestion 0.00 0% 0.00 0%Dermal uptake constant (ug/dl)/(ug/day) Food Ingestion, bkgrnd 0.00 0% 0.00 0%Soil ingestion mg/day 0 0 Food Ingestion 0.0E+0 0.00 0% 0%Soil ingestion, pica mg/day 0Ingestion constant (ug/dl)/(ug/day) 0.04 0.16Bioavailability unitless
Breathing rate m3/day 20 6.8 PEF ug/dl percent PEF ug/dl percentInhalation constant (ug/dl)/(ug/day) 0.08 0.192 Soil Contact 0.0E+0 0.00 0% 0.00 0%Water ingestion l/day 1.4 0.4 Soil Ingestion 0.0E+0 0.00 0% 0.0E+0 0.00 0%Food ingestion kg/day 1.9 1.1 Inhalation 2.0E-6 0.00 100% 0.00 100%Lead in market basket ug/kg Inhalation, bkgrnd 0.00 0% 0.00 0%Lead in home-grown produce ug/kg Water Ingestion 0.00 0% 0.00 0%
Food Ingestion, bkgrnd 0.00 0% 0.00 0%Click here for REFERENCES Food Ingestion 0.0E+0 0.00 0% 0.00 0%
Pathway
0.0581.0
CHILDREN typical with pica0.44 Pathway contribution Pathway contribution
Pathway1.61
0.0001
ADULTS Residential Occupational7 Pathway contribution Pathway contribution
LEAD RISK ASSESSMENT SPREADSHEETCALIFORNIA DEPARTMENT OF TOXIC SUBSTANCES CONTROL
Percentile Estimate of Blood Pb (ug/dl)
EXPOSURE PARAMETERS PATHWAYS
Lodi_HRA_Tables Page 1 of 1 IRIS ENVIRONMENTAL
On-site Resident, Age-Adjusted
Particulate Inhalation
Dermal Contact Ingestion
Total Cancer Risk
Volatile Organic CompoundsBenzene 7.0E-10 3.6E-06 1.1E-05 1.5E-05Ethylbenzene 4.3E-11 2.8E-07 8.6E-07 1.1E-06Toluene NC NC NC NCm,p-Xylene NC NC NC NCo-Xylene NC NC NC NCPolycyclic Aromatic Hydrocarbons1-Methylnaphthalene NC 1.1E-09 3.5E-09 4.7E-092-Methylnaphthalene NC NC NC NCAcenaphthene NC NC NC NCAcenaphthylene NC NC NC NCAnthracene NC NC NC NCBenzo (a) anthracene NA NA NA NABenzo (a) pyrene NA NA NA NABenzo (b) fluoranthene NA NA NA NABenzo (g,h,i) perylene NC NC NC NCBenzo (k) fluoranthene NA NA NA NAChrysene NA NA NA NADibenz (a,h) Anthracene NA NA NA NAFluoranthene NC NC NC NCFluorene NC NC NC NCIndeno (1,2,3-c,d) pyrene NA NA NA NANaphthalene 7.1E-09 5.5E-05 1.1E-04 1.7E-04Phenanthrene NC NC NC NCPyrene NC NC NC NCCarcinogenic Polycyclic Aromatic HydrocarbonsBenzo(a)pyrene Equivalent 8.7E-08 2.1E-03 4.4E-03 6.5E-03InorganicsAntimony NC NC NC NCBarium NC NC NC NCBeryllium 1.9E-10 NC NC 1.9E-10Cadmium 8.3E-10 NC NC 8.3E-10Chromium NC NC NC NCCobalt 2.5E-08 NC NC 2.5E-08Copper NC NC NC NCCyanide, Total NC NC NC NC
Soil PathwayChemical
Lodi, California
TABLE 18CANCER RISK FROM SOILS:
FUTURE ON-SITE RESIDENTIAL SCENARIOFormer Lodi Manufactured Gas Plant
Lodi_HRA_Tables Page 1 of 2 IRIS ENVIRONMENTAL
On-site Resident, Age-Adjusted
Particulate Inhalation
Dermal Contact Ingestion
Total Cancer Risk
Soil PathwayChemical
Lodi, California
TABLE 18CANCER RISK FROM SOILS:
FUTURE ON-SITE RESIDENTIAL SCENARIOFormer Lodi Manufactured Gas Plant
Lead NA NA NA NAMercury NC NC NC NCMolybdenum NC NC NC NCNickel 1.0E-08 NC NC 1.0E-08Silver NC NC NC NCThallium NC NC NC NCVanadium NC NC NC NCZinc NC NC NC NCTotal Cancer Risk 1.3E-07 2.2E-03 4.5E-03 6.7E-03
Notes:
NC = Not considered a carcinogen.
NA = Not applicable. Cancer risks not calculated for chemicals not considered a carcinogen. Carcinogenic PAHs are evaluated using benzo(a)pyrene equivalents, and potential exposure to lead is evaluated using OEHHA's
Lodi_HRA_Tables Page 2 of 2 IRIS ENVIRONMENTAL
On-site Resident Child
Particulate Inhalation
Dermal Contact Ingestion
Total Hazard Index
Volatile Organic CompoundsBenzene 1.9E-06 6.5E-02 2.3E-01 2.9E-01Ethylbenzene 4.0E-08 1.9E-03 6.4E-03 8.2E-03Toluene 1.1E-10 1.9E-06 6.5E-06 8.3E-06m,p-Xylene 4.6E-09 1.1E-05 3.7E-05 4.8E-05o-Xylene 1.6E-09 3.7E-06 1.3E-05 1.6E-05Polycyclic Aromatic Hydrocarbons1-Methylnaphthalene 4.5E-09 7.2E-05 2.5E-04 3.2E-042-Methylnaphthalene 2.0E-06 3.2E-02 1.1E-01 1.4E-01Acenaphthene 1.4E-09 3.3E-05 7.6E-05 1.1E-04Acenaphthylene 4.5E-07 1.1E-02 2.5E-02 3.6E-02Anthracene 4.8E-08 1.2E-03 2.7E-03 3.9E-03Benzo (a) anthracene 8.2E-07 2.0E-02 4.6E-02 6.6E-02Benzo (a) pyrene 1.8E-06 4.4E-02 1.0E-01 1.5E-01Benzo (b) fluoranthene 1.1E-06 2.7E-02 6.1E-02 8.8E-02Benzo (g,h,i) perylene 2.4E-06 5.9E-02 1.3E-01 1.9E-01Benzo (k) fluoranthene 1.1E-06 2.7E-02 6.2E-02 8.8E-02Chrysene 1.1E-06 2.7E-02 6.2E-02 8.9E-02Dibenz (a,h) Anthracene 8.8E-09 2.1E-04 4.9E-04 7.0E-04Fluoranthene 3.5E-06 8.6E-02 2.0E-01 2.8E-01Fluorene 2.1E-07 5.2E-03 1.2E-02 1.7E-02Indeno (1,2,3-c,d) pyrene 1.7E-06 4.1E-02 9.3E-02 1.3E-01Naphthalene 1.6E-04 1.7E-01 3.9E-01 5.6E-01Phenanthrene 3.4E-07 8.4E-03 1.9E-02 2.8E-02Pyrene 4.9E-06 1.2E-01 2.7E-01 3.9E-01InorganicsAntimony 1.1E-06 1.7E-03 6.0E-02 6.2E-02Barium 1.6E-04 1.9E-04 6.5E-03 6.8E-03Beryllium 2.7E-05 4.3E-04 1.5E-02 1.5E-02Cadmium 2.3E-05 4.3E-05 1.5E-02 1.5E-02Chromium 1.5E-09 2.4E-06 8.1E-05 8.4E-05Cobalt 1.1E-03 9.8E-03 3.4E-01 3.5E-01Copper 1.1E-07 1.8E-04 6.2E-03 6.3E-03Cyanide, Total 1.5E-06 9.4E-03 3.2E-02 4.2E-02
TABLE 19
Soil PathwayChemical
NONCANCER HAZARD INDICES FROM SOILS: FUTURE ON-SITE RESIDENTIAL SCENARIO
Former Lodi Manufactured Gas PlantLodi, California
Lodi_HRA_Tables Page 1 of 4 IRIS ENVIRONMENTAL
On-site Resident Child
Particulate Inhalation
Dermal Contact Ingestion
Total Hazard Index
TABLE 19
Soil PathwayChemical
NONCANCER HAZARD INDICES FROM SOILS: FUTURE ON-SITE RESIDENTIAL SCENARIO
Former Lodi Manufactured Gas PlantLodi, California
Lead NA NA NA NAMercury 1.7E-06 1.5E-04 5.1E-03 5.2E-03Molybdenum 3.4E-08 5.4E-05 1.9E-03 1.9E-03Nickel 1.9E-03 2.2E-03 7.5E-02 7.9E-02Silver 1.3E-08 2.1E-05 7.2E-04 7.4E-04Thallium 2.7E-05 4.4E-02 1.5E+00 1.6E+00Vanadium 1.6E-06 2.5E-03 8.7E-02 9.0E-02Zinc 5.5E-08 8.9E-05 3.1E-03 3.2E-03Total Hazard Index 3.4E-03 8.1E-01 4.0E+00 4.8E+00
Notes:Not applicable. Potential exposure to lead is evaluated using OEHHA's CHHSL for lead. Please see text for discussion.
NA =
Lodi_HRA_Tables Page 2 of 4 IRIS ENVIRONMENTAL
On-site Resident Adult
Particulate Inhalation
Dermal Contact Ingestion
Total Hazard Index
Volatile Organic CompoundsBenzene 1.9E-06 9.6E-03 2.4E-02 3.4E-02Ethylbenzene 4.0E-08 2.7E-04 6.8E-04 9.6E-04Toluene 1.1E-10 2.8E-07 6.9E-07 9.7E-07m,p-Xylene 4.6E-09 1.6E-06 4.0E-06 5.6E-06o-Xylene 1.6E-09 5.4E-07 1.3E-06 1.9E-06Polycyclic Aromatic Hydrocarbons1-Methylnaphthalene 4.5E-09 1.1E-05 2.7E-05 3.7E-052-Methylnaphthalene 2.0E-06 4.7E-03 1.2E-02 1.7E-02Acenaphthene 1.4E-09 4.9E-06 8.1E-06 1.3E-05Acenaphthylene 4.5E-07 1.6E-03 2.7E-03 4.3E-03Anthracene 4.8E-08 1.7E-04 2.9E-04 4.6E-04Benzo (a) anthracene 8.2E-07 3.0E-03 4.9E-03 7.9E-03Benzo (a) pyrene 1.8E-06 6.5E-03 1.1E-02 1.7E-02Benzo (b) fluoranthene 1.1E-06 3.9E-03 6.5E-03 1.0E-02Benzo (g,h,i) perylene 2.4E-06 8.6E-03 1.4E-02 2.3E-02Benzo (k) fluoranthene 1.1E-06 4.0E-03 6.6E-03 1.1E-02Chrysene 1.1E-06 4.0E-03 6.7E-03 1.1E-02Dibenz (a,h) Anthracene 8.8E-09 3.1E-05 5.3E-05 8.4E-05Fluoranthene 3.5E-06 1.3E-02 2.1E-02 3.4E-02Fluorene 2.1E-07 7.6E-04 1.3E-03 2.0E-03Indeno (1,2,3-c,d) pyrene 1.7E-06 6.0E-03 1.0E-02 1.6E-02Naphthalene 1.6E-04 2.5E-02 4.2E-02 6.7E-02Phenanthrene 3.4E-07 1.2E-03 2.1E-03 3.3E-03Pyrene 4.9E-06 1.8E-02 2.9E-02 4.7E-02InorganicsAntimony 1.1E-06 2.6E-04 6.4E-03 6.7E-03Barium 1.6E-04 2.8E-05 6.9E-04 8.8E-04Beryllium 2.7E-05 6.3E-05 1.6E-03 1.7E-03Cadmium 2.3E-05 6.3E-06 1.6E-03 1.6E-03Chromium 1.5E-09 3.5E-07 8.7E-06 9.1E-06Cobalt 1.1E-03 1.5E-03 3.6E-02 3.9E-02Copper 1.1E-07 2.6E-05 6.6E-04 6.9E-04Cyanide, Total 1.5E-06 1.4E-03 3.5E-03 4.9E-03
Lodi, California
Soil PathwayChemical
TABLE 19NONCANCER HAZARD INDICES FROM SOILS:
FUTURE ON-SITE RESIDENTIAL SCENARIOFormer Lodi Manufactured Gas Plant
Lodi_HRA_Tables Page 3 of 4 IRIS ENVIRONMENTAL
On-site Resident Adult
Particulate Inhalation
Dermal Contact Ingestion
Total Hazard Index
Lodi, California
Soil PathwayChemical
TABLE 19NONCANCER HAZARD INDICES FROM SOILS:
FUTURE ON-SITE RESIDENTIAL SCENARIOFormer Lodi Manufactured Gas Plant
Lead NA NA NA NAMercury 1.7E-06 2.2E-05 5.4E-04 5.7E-04Molybdenum 3.4E-08 8.0E-06 2.0E-04 2.1E-04Nickel 1.9E-03 3.2E-04 8.0E-03 1.0E-02Silver 1.3E-08 3.1E-06 7.7E-05 8.0E-05Thallium 2.7E-05 6.5E-03 1.6E-01 1.7E-01Vanadium 1.6E-06 3.7E-04 9.3E-03 9.7E-03Zinc 5.5E-08 1.3E-05 3.3E-04 3.4E-04Total Hazard Index 3.4E-03 1.2E-01 4.3E-01 5.5E-01
Notes:NA = Not applicable. Potential exposure to lead is evaluated using OEHHA's CHHSL for lead. Please see
text for discussion.
Lodi_HRA_Tables Page 4 of 4 IRIS ENVIRONMENTAL
TABLE 20RISK EVALUATION FOR LEAD IN SOILS:
FUTURE ON-SITE RESIDENTIAL SCENARIOFormer Lodi Manufactured Gas Plant
Lodi, California
USER'S GUIDE to version 7
INPUT OUTPUT
MEDIUM LEVEL PRG-99 PRG-90Lead in Air (ug/m3) 0 50th 90th 95th 98th 99th (ug/g) (ug/g)
Lead in Soil/Dust (ug/g) 631 BLOOD Pb, ADULT 0.6 1.1 1.3 1.5 1.7 363 502Lead in Water (ug/l) 0 BLOOD Pb, CHILD 4.5 8.2 9.7 11.8 13.4 47 77% Home-grown Produce 0% BLOOD Pb, PICA CHILD 8.9 16.3 19.3 23.4 26.7 24 39Respirable Dust (ug/m3) 1.5 BLOOD Pb, OCCUPATIONAL 0.4 0.7 0.9 1.1 1.2 519 718
units adults childrenDays per week days/wk
Days per week, occupational 5 PEF ug/dl percent PEF ug/dl percentGeometric Standard Deviation Soil Contact 3.8E-5 0.02 4% 1.4E-5 0.01 2%Blood lead level of concern (ug/dl) Soil Ingestion 8.8E-4 0.56 96% 6.3E-4 0.40 98%Skin area, residential cm2 5700 2900 Inhalation, bkgrnd 0.00 0% 0.00 0%Skin area occupational cm2 2900 Inhalation 2.5E-6 0.00 0% 1.8E-6 0.00 0%Soil adherence ug/cm2 70 200 Water Ingestion 0.00 0% 0.00 0%Dermal uptake constant (ug/dl)/(ug/day) Food Ingestion, bkgrnd 0.00 0% 0.00 0%Soil ingestion mg/day 50 100 Food Ingestion 0.0E+0 0.00 0% 0%Soil ingestion, pica mg/day 200Ingestion constant (ug/dl)/(ug/day) 0.04 0.16Bioavailability unitless
Breathing rate m3/day 20 6.8 PEF ug/dl percent PEF ug/dl percentInhalation constant (ug/dl)/(ug/day) 0.08 0.192 Soil Contact 5.6E-5 0.04 1% 0.04 0%Water ingestion l/day 1.4 0.4 Soil Ingestion 7.0E-3 4.44 99% 1.4E-2 8.88 100%Food ingestion kg/day 1.9 1.1 Inhalation 2.0E-6 0.00 0% 0.00 0%Lead in market basket ug/kg Inhalation, bkgrnd 0.00 0% 0.00 0%Lead in home-grown produce ug/kg Water Ingestion 0.00 0% 0.00 0%
Food Ingestion, bkgrnd 0.00 0% 0.00 0%Click here for REFERENCES Food Ingestion 0.0E+0 0.00 0% 0.00 0%
LEAD RISK ASSESSMENT SPREADSHEETCALIFORNIA DEPARTMENT OF TOXIC SUBSTANCES CONTROL
Percentile Estimate of Blood Pb (ug/dl)
EXPOSURE PARAMETERS PATHWAYSADULTS Residential Occupational
7 Pathway contribution Pathway contributionPathway
1.61
0.0001
typical with pica0.44 Pathway contribution Pathway contribution
Pathway
0.0284.0
CHILDREN
Lodi_HRA_Tables Page 1 of 1 IRIS ENVIRONMENTAL
Sample ID
Soil Gas Sample
Locationa
Sampling Depth
(feet bgs) Chemical
Soil Gas Concentration
(mg/m3)b
Transfer Factor
[(mg/m3)/(mg/m3)]c
Exposure Point
Concentration (EPC) in
Outdoor Air (mg/m3)d
Exposure Concentration (EC)
in Outdoor Air – Cancer Effects
(mg/m3)e
Exposure Concentration (EC)
in Outdoor Air– Noncancer
Effects (mg/m3)e
URF (mg/m3)-1
RfC (mg/m3)
Incremental Cancer
Risk from Vapors
in Outdoor Air(unitless)f
Noncancer Hazard
Quotient from Vapors
in Outdoor Air (unitless)f
Cumulative Cancer
Risk
Cumulative Noncancer
Hazard SG-1S SG-1 5 1,1-Difluoroethane 0.0019 6.3E-06 1.2E-08 4.9E-09 1.1E-08 NC 4.0E+01 NC 2.9E-10SG-1S SG-1 5 1,2,4-Trimethylbenzene 0.14 3.7E-06 5.2E-07 2.1E-07 5.0E-07 NC 7.0E-03 NC 7.2E-05SG-1S SG-1 5 1,3,5-Trimethylbenzene 0.066 3.7E-06 2.4E-07 1.0E-07 2.3E-07 NC 6.0E-03 NC 3.9E-05SG-1S SG-1 5 2-Butanone (Methyl Ethyl K 0.0053 5.0E-06 2.7E-08 1.1E-08 2.5E-08 NC 5.0E+00 NC 5.1E-09SG-1S SG-1 5 2-Hexanone 0.0029 4.4E-06 1.3E-08 5.2E-09 1.2E-08 NC 3.0E-02 NC 4.0E-07SG-1S SG-1 5 4-Ethyltoluene 0.16 4.2E-06 6.7E-07 2.8E-07 6.4E-07 NC 1.0E-01 NC 6.4E-06SG-1S SG-1 5 Acetone 0.068 7.7E-06 5.2E-07 2.2E-07 5.0E-07 NC 3.1E+01 NC 1.6E-08SG-1S SG-1 5 Benzene 0.0017 5.4E-06 9.2E-09 3.8E-09 8.8E-09 2.9E-02 3.0E-02 1.1E-10 2.9E-07SG-1S SG-1 5 Carbon Disulfide 0.0022 6.4E-06 1.4E-08 5.8E-09 1.4E-08 NC 7.0E-01 NC 1.9E-08SG-1S SG-1 5 Cumene 0.0058 4.0E-06 2.3E-08 9.5E-09 2.2E-08 NC 4.0E-01 NC 5.6E-08SG-1S SG-1 5 Ethanol 0.0032 8.1E-06 2.6E-08 1.1E-08 2.5E-08 NC 1.1E+00 NC 2.4E-08SG-1S SG-1 5 Ethylbenzene 0.052 4.6E-06 2.4E-07 9.9E-08 2.3E-07 2.5E-03 1.0E+00 2.5E-10 2.3E-07SG-1S SG-1 5 Freon 11 0.0008 5.4E-06 4.3E-09 1.8E-09 4.1E-09 NC 7.0E-01 NC 5.9E-09SG-1S SG-1 5 Freon 12 0.0014 4.1E-06 5.7E-09 2.4E-09 5.5E-09 NC 2.0E-01 NC 2.8E-08SG-1S SG-1 5 Heptane 0.0006 4.3E-06 2.6E-09 1.1E-09 2.5E-09 NC 7.0E-01 NC 3.6E-09SG-1S SG-1 5 Methyl tert-butyl ether 0.001 6.3E-06 6.3E-09 2.6E-09 6.1E-09 2.6E-04 3.0E+00 6.7E-13 2.0E-09SG-1S SG-1 5 Naphthalene 0.00375 3.6E-06 1.4E-08 5.6E-09 1.3E-08 3.4E-02 3.0E-03 1.9E-10 4.4E-06SG-1S SG-1 5 Propylbenzene 0.021 3.7E-06 7.8E-08 3.2E-08 7.5E-08 NC 1.0E+00 NC 7.5E-08SG-1S SG-1 5 Styrene 0.0006 4.4E-06 2.6E-09 1.1E-09 2.5E-09 NC 9.0E-01 NC 2.8E-09SG-1S SG-1 5 Tetrachloroethene 0.0021 4.4E-06 9.3E-09 3.8E-09 8.9E-09 5.9E-03 3.5E-02 2.3E-11 2.6E-07SG-1S SG-1 5 Toluene 0.011 5.4E-06 5.9E-08 2.4E-08 5.7E-08 NC 3.0E-01 NC 1.9E-07SG-1S SG-1 5 Total Xylenes 0.311 5.2E-06 1.6E-06 6.7E-07 1.6E-06 NC 1.0E-01 NC 1.6E-05SG-1S SG-1 5 Trichloroethene 0.00075 4.9E-06 3.7E-09 1.5E-09 3.5E-09 2.0E-03 6.0E-01 3.0E-12 5.8E-09 5.7E-10 1.4E-04SG-1D SG-1 8 1,1-Difluoroethane 0.0029 3.9E-06 1.1E-08 4.7E-09 1.1E-08 NC 4.0E+01 NC 2.7E-10SG-1D SG-1 8 1,2,4-Trimethylbenzene 0.21 2.3E-06 4.9E-07 2.0E-07 4.7E-07 NC 7.0E-03 NC 6.7E-05SG-1D SG-1 8 1,3,5-Trimethylbenzene 0.091 2.3E-06 2.1E-07 8.7E-08 2.0E-07 NC 6.0E-03 NC 3.4E-05SG-1D SG-1 8 2-Butanone (Methyl Ethyl K 0.0039 3.1E-06 1.2E-08 5.0E-09 1.2E-08 NC 5.0E+00 NC 2.3E-09SG-1D SG-1 8 2-Hexanone 0.0044 2.7E-06 1.2E-08 4.9E-09 1.1E-08 NC 3.0E-02 NC 3.8E-07SG-1D SG-1 8 4-Ethyltoluene 0.22 2.6E-06 5.8E-07 2.4E-07 5.5E-07 NC 1.0E-01 NC 5.5E-06SG-1D SG-1 8 Acetone 0.078 4.8E-06 3.8E-07 1.5E-07 3.6E-07 NC 3.1E+01 NC 1.2E-08SG-1D SG-1 8 Benzene 0.0022 3.4E-06 7.5E-09 3.1E-09 7.1E-09 2.9E-02 3.0E-02 8.9E-11 2.4E-07SG-1D SG-1 8 Carbon Disulfide 0.00335 4.0E-06 1.3E-08 5.5E-09 1.3E-08 NC 7.0E-01 NC 1.8E-08SG-1D SG-1 8 Cumene 0.008 2.5E-06 2.0E-08 8.2E-09 1.9E-08 NC 4.0E-01 NC 4.8E-08SG-1D SG-1 8 Ethanol 0.002 5.0E-06 1.0E-08 4.1E-09 9.7E-09 NC 1.1E+00 NC 9.2E-09SG-1D SG-1 8 Ethylbenzene 0.071 2.9E-06 2.1E-07 8.4E-08 2.0E-07 2.5E-03 1.0E+00 2.1E-10 2.0E-07SG-1D SG-1 8 Freon 11 0.0012 3.4E-06 4.0E-09 1.7E-09 3.9E-09 NC 7.0E-01 NC 5.5E-09SG-1D SG-1 8 Freon 12 0.00105 2.6E-06 2.7E-09 1.1E-09 2.6E-09 NC 2.0E-01 NC 1.3E-08SG-1D SG-1 8 Heptane 0.0009 2.7E-06 2.4E-09 1.0E-09 2.3E-09 NC 7.0E-01 NC 3.3E-09SG-1D SG-1 8 Methyl tert-butyl ether 0.00075 3.9E-06 3.0E-09 1.2E-09 2.8E-09 2.6E-04 3.0E+00 3.2E-13 9.5E-10SG-1D SG-1 8 Naphthalene 0.0055 2.3E-06 1.3E-08 5.1E-09 1.2E-08 3.4E-02 3.0E-03 1.7E-10 4.0E-06SG-1D SG-1 8 Propylbenzene 0.028 2.3E-06 6.5E-08 2.7E-08 6.2E-08 NC 1.0E+00 NC 6.2E-08SG-1D SG-1 8 Styrene 0.005 2.7E-06 1.4E-08 5.6E-09 1.3E-08 NC 9.0E-01 NC 1.5E-08SG-1D SG-1 8 Tetrachloroethene 0.0039 2.8E-06 1.1E-08 4.4E-09 1.0E-08 5.9E-03 3.5E-02 2.6E-11 3.0E-07SG-1D SG-1 8 Toluene 0.013 3.4E-06 4.4E-08 1.8E-08 4.2E-08 NC 3.0E-01 NC 1.4E-07SG-1D SG-1 8 Total Xylenes 0.459 3.3E-06 1.5E-06 6.2E-07 1.4E-06 NC 1.0E-01 NC 1.4E-05SG-1D SG-1 8 Trichloroethene 0.00115 3.0E-06 3.5E-09 1.4E-09 3.4E-09 2.0E-03 6.0E-01 2.9E-12 5.6E-09 5.0E-10 1.3E-04
TABLE 21OUTDOOR AIR INHALATION CANCER RISKS AND NONCANCER HAZARD INDICES FOR VOCS IN SOIL GAS:
CURRENT OFF-SITE AND FUTURE ON-SITE RESIDENTIAL SCENARIOSFormer Lodi Manufactured Gas Plant
Lodi, California
Lodi_HRA_Tables Page 1 of 7 IRIS ENVIRONMENTAL
Sample ID
Soil Gas Sample
Locationa
Sampling Depth
(feet bgs) Chemical
Soil Gas Concentration
(mg/m3)b
Transfer Factor
[(mg/m3)/(mg/m3)]c
Exposure Point
Concentration (EPC) in
Outdoor Air (mg/m3)d
Exposure Concentration (EC)
in Outdoor Air – Cancer Effects
(mg/m3)e
Exposure Concentration (EC)
in Outdoor Air– Noncancer
Effects (mg/m3)e
URF (mg/m3)-1
RfC (mg/m3)
Incremental Cancer
Risk from Vapors
in Outdoor Air(unitless)f
Noncancer Hazard
Quotient from Vapors
in Outdoor Air (unitless)f
Cumulative Cancer
Risk
Cumulative Noncancer
Hazard
TABLE 21OUTDOOR AIR INHALATION CANCER RISKS AND NONCANCER HAZARD INDICES FOR VOCS IN SOIL GAS:
CURRENT OFF-SITE AND FUTURE ON-SITE RESIDENTIAL SCENARIOSFormer Lodi Manufactured Gas Plant
Lodi, California
SG-2S SG-2 5 1,1-Difluoroethane 0.026 6.3E-06 1.6E-07 6.7E-08 1.6E-07 NC 4.0E+01 NC 3.9E-09SG-2S SG-2 5 1,2,4-Trimethylbenzene 0.12 3.7E-06 4.5E-07 1.8E-07 4.3E-07 NC 7.0E-03 NC 6.1E-05SG-2S SG-2 5 1,3,5-Trimethylbenzene 0.041 3.7E-06 1.5E-07 6.3E-08 1.5E-07 NC 6.0E-03 NC 2.5E-05SG-2S SG-2 5 2-Butanone (Methyl Ethyl K 0.0055 5.0E-06 2.8E-08 1.1E-08 2.6E-08 NC 5.0E+00 NC 5.3E-09SG-2S SG-2 5 2-Hexanone 0.039 4.4E-06 1.7E-07 7.0E-08 1.6E-07 NC 3.0E-02 NC 5.4E-06SG-2S SG-2 5 4-Ethyltoluene 0.07 4.2E-06 2.9E-07 1.2E-07 2.8E-07 NC 1.0E-01 NC 2.8E-06SG-2S SG-2 5 Acetone 0.15 7.7E-06 1.2E-06 4.7E-07 1.1E-06 NC 3.1E+01 NC 3.6E-08SG-2S SG-2 5 Benzene 0.006 5.4E-06 3.3E-08 1.3E-08 3.1E-08 2.9E-02 3.0E-02 3.9E-10 1.0E-06SG-2S SG-2 5 Carbon Disulfide 0.0295 6.4E-06 1.9E-07 7.8E-08 1.8E-07 NC 7.0E-01 NC 2.6E-07SG-2S SG-2 5 Cumene 0.019 4.0E-06 7.6E-08 3.1E-08 7.3E-08 NC 4.0E-01 NC 1.8E-07SG-2S SG-2 5 Ethanol 0.018 8.1E-06 1.5E-07 6.0E-08 1.4E-07 NC 1.1E+00 NC 1.3E-07SG-2S SG-2 5 Ethylbenzene 0.25 4.6E-06 1.2E-06 4.7E-07 1.1E-06 2.5E-03 1.0E+00 1.2E-09 1.1E-06SG-2S SG-2 5 Freon 11 0.0105 5.4E-06 5.6E-08 2.3E-08 5.4E-08 NC 7.0E-01 NC 7.7E-08SG-2S SG-2 5 Freon 12 0.0095 4.1E-06 3.9E-08 1.6E-08 3.7E-08 NC 2.0E-01 NC 1.9E-07SG-2S SG-2 5 Heptane 0.008 4.3E-06 3.5E-08 1.4E-08 3.3E-08 NC 7.0E-01 NC 4.8E-08SG-2S SG-2 5 Methyl tert-butyl ether 0.014 6.3E-06 8.8E-08 3.6E-08 8.5E-08 2.6E-04 3.0E+00 9.4E-12 2.8E-08SG-2S SG-2 5 Naphthalene 0.05 3.6E-06 1.8E-07 7.5E-08 1.7E-07 3.4E-02 3.0E-03 2.5E-09 5.8E-05SG-2S SG-2 5 Propylbenzene 0.0095 3.7E-06 3.5E-08 1.4E-08 3.4E-08 NC 1.0E+00 NC 3.4E-08SG-2S SG-2 5 Styrene 0.008 4.4E-06 3.5E-08 1.4E-08 3.4E-08 NC 9.0E-01 NC 3.7E-08SG-2S SG-2 5 Tetrachloroethene 0.013 4.4E-06 5.8E-08 2.4E-08 5.5E-08 5.9E-03 3.5E-02 1.4E-10 1.6E-06SG-2S SG-2 5 Toluene 3.4 5.4E-06 1.8E-05 7.5E-06 1.7E-05 NC 3.0E-01 NC 5.8E-05SG-2S SG-2 5 Total Xylenes 1.34 5.2E-06 7.0E-06 2.9E-06 6.7E-06 NC 1.0E-01 NC 6.7E-05SG-2S SG-2 5 Trichloroethene 0.01 4.9E-06 4.9E-08 2.0E-08 4.7E-08 2.0E-03 6.0E-01 4.0E-11 7.8E-08 4.3E-09 2.8E-04SG-2D SG-2 8 1,1-Difluoroethane 0.06 3.9E-06 2.4E-07 9.7E-08 2.3E-07 NC 4.0E+01 NC 5.7E-09SG-2D SG-2 8 1,2,4-Trimethylbenzene 0.16 2.3E-06 3.7E-07 1.5E-07 3.6E-07 NC 7.0E-03 NC 5.1E-05SG-2D SG-2 8 1,3,5-Trimethylbenzene 0.069 2.3E-06 1.6E-07 6.6E-08 1.5E-07 NC 6.0E-03 NC 2.6E-05SG-2D SG-2 8 2-Butanone (Methyl Ethyl K 0.016 3.1E-06 5.0E-08 2.1E-08 4.8E-08 NC 5.0E+00 NC 9.6E-09SG-2D SG-2 8 2-Hexanone 0.09 2.7E-06 2.4E-07 1.0E-07 2.3E-07 NC 3.0E-02 NC 7.8E-06SG-2D SG-2 8 4-Ethyltoluene 0.091 2.6E-06 2.4E-07 9.8E-08 2.3E-07 NC 1.0E-01 NC 2.3E-06SG-2D SG-2 8 Acetone 0.26 4.8E-06 1.3E-06 5.1E-07 1.2E-06 NC 3.1E+01 NC 3.9E-08SG-2D SG-2 8 Benzene 0.017 3.4E-06 5.8E-08 2.4E-08 5.5E-08 2.9E-02 3.0E-02 6.9E-10 1.8E-06SG-2D SG-2 8 Carbon Disulfide 0.0165 4.0E-06 6.6E-08 2.7E-08 6.3E-08 NC 7.0E-01 NC 9.1E-08SG-2D SG-2 8 Cumene 0.026 2.5E-06 6.5E-08 2.7E-08 6.2E-08 NC 4.0E-01 NC 1.6E-07SG-2D SG-2 8 Ethanol 0.0405 5.0E-06 2.0E-07 8.4E-08 2.0E-07 NC 1.1E+00 NC 1.9E-07SG-2D SG-2 8 Ethylbenzene 0.69 2.9E-06 2.0E-06 8.2E-07 1.9E-06 2.5E-03 1.0E+00 2.0E-09 1.9E-06SG-2D SG-2 8 Freon 11 0.03 3.4E-06 1.0E-07 4.1E-08 9.6E-08 NC 7.0E-01 NC 1.4E-07SG-2D SG-2 8 Freon 12 0.0265 2.6E-06 6.8E-08 2.8E-08 6.5E-08 NC 2.0E-01 NC 3.3E-07SG-2D SG-2 8 Heptane 0.022 2.7E-06 6.0E-08 2.5E-08 5.7E-08 NC 7.0E-01 NC 8.2E-08SG-2D SG-2 8 Methyl tert-butyl ether 0.019 3.9E-06 7.5E-08 3.1E-08 7.2E-08 2.6E-04 3.0E+00 8.0E-12 2.4E-08SG-2D SG-2 8 Naphthalene 0.11 2.3E-06 2.5E-07 1.0E-07 2.4E-07 3.4E-02 3.0E-03 3.5E-09 8.0E-05SG-2D SG-2 8 Propylbenzene 0.0265 2.3E-06 6.1E-08 2.5E-08 5.9E-08 NC 1.0E+00 NC 5.9E-08SG-2D SG-2 8 Styrene 0.023 2.7E-06 6.3E-08 2.6E-08 6.0E-08 NC 9.0E-01 NC 6.7E-08SG-2D SG-2 8 Tetrachloroethene 0.036 2.8E-06 1.0E-07 4.1E-08 9.6E-08 5.9E-03 3.5E-02 2.4E-10 2.7E-06SG-2D SG-2 8 Toluene 8 3.4E-06 2.7E-05 1.1E-05 2.6E-05 NC 3.0E-01 NC 8.6E-05SG-2D SG-2 8 Total Xylenes 3.49 3.3E-06 1.1E-05 4.7E-06 1.1E-05 NC 1.0E-01 NC 1.1E-04SG-2D SG-2 8 Trichloroethene 0.029 3.0E-06 8.8E-08 3.6E-08 8.5E-08 2.0E-03 6.0E-01 7.3E-11 1.4E-07 6.6E-09 3.7E-04
Lodi_HRA_Tables Page 2 of 7 IRIS ENVIRONMENTAL
Sample ID
Soil Gas Sample
Locationa
Sampling Depth
(feet bgs) Chemical
Soil Gas Concentration
(mg/m3)b
Transfer Factor
[(mg/m3)/(mg/m3)]c
Exposure Point
Concentration (EPC) in
Outdoor Air (mg/m3)d
Exposure Concentration (EC)
in Outdoor Air – Cancer Effects
(mg/m3)e
Exposure Concentration (EC)
in Outdoor Air– Noncancer
Effects (mg/m3)e
URF (mg/m3)-1
RfC (mg/m3)
Incremental Cancer
Risk from Vapors
in Outdoor Air(unitless)f
Noncancer Hazard
Quotient from Vapors
in Outdoor Air (unitless)f
Cumulative Cancer
Risk
Cumulative Noncancer
Hazard
TABLE 21OUTDOOR AIR INHALATION CANCER RISKS AND NONCANCER HAZARD INDICES FOR VOCS IN SOIL GAS:
CURRENT OFF-SITE AND FUTURE ON-SITE RESIDENTIAL SCENARIOSFormer Lodi Manufactured Gas Plant
Lodi, California
SG-3S SG-3 5 1,1-Difluoroethane 0.0012 6.3E-06 7.6E-09 3.1E-09 7.3E-09 NC 4.0E+01 NC 1.8E-10SG-3S SG-3 5 1,2,4-Trimethylbenzene 0.18 3.7E-06 6.7E-07 2.8E-07 6.4E-07 NC 7.0E-03 NC 9.2E-05SG-3S SG-3 5 1,3,5-Trimethylbenzene 0.06 3.7E-06 2.2E-07 9.1E-08 2.1E-07 NC 6.0E-03 NC 3.6E-05SG-3S SG-3 5 2-Butanone (Methyl Ethyl K 0.0032 5.0E-06 1.6E-08 6.6E-09 1.5E-08 NC 5.0E+00 NC 3.1E-09SG-3S SG-3 5 2-Hexanone 0.0018 4.4E-06 7.8E-09 3.2E-09 7.5E-09 NC 3.0E-02 NC 2.5E-07SG-3S SG-3 5 4-Ethyltoluene 0.21 4.2E-06 8.8E-07 3.6E-07 8.4E-07 NC 1.0E-01 NC 8.4E-06SG-3S SG-3 5 Acetone 0.085 7.7E-06 6.5E-07 2.7E-07 6.3E-07 NC 3.1E+01 NC 2.0E-08SG-3S SG-3 5 Benzene 0.0014 5.4E-06 7.6E-09 3.1E-09 7.3E-09 2.9E-02 3.0E-02 9.0E-11 2.4E-07SG-3S SG-3 5 Carbon Disulfide 0.00135 6.4E-06 8.7E-09 3.6E-09 8.3E-09 NC 7.0E-01 NC 1.2E-08SG-3S SG-3 5 Cumene 0.011 4.0E-06 4.4E-08 1.8E-08 4.2E-08 NC 4.0E-01 NC 1.1E-07SG-3S SG-3 5 Ethanol 0.0008 8.1E-06 6.5E-09 2.7E-09 6.2E-09 NC 1.1E+00 NC 5.9E-09SG-3S SG-3 5 Ethylbenzene 0.03 4.6E-06 1.4E-07 5.7E-08 1.3E-07 2.5E-03 1.0E+00 1.4E-10 1.3E-07SG-3S SG-3 5 Freon 11 0.0013 5.4E-06 7.0E-09 2.9E-09 6.7E-09 NC 7.0E-01 NC 9.5E-09SG-3S SG-3 5 Freon 12 0.001 4.1E-06 4.1E-09 1.7E-09 3.9E-09 NC 2.0E-01 NC 2.0E-08SG-3S SG-3 5 Heptane 0.001 4.3E-06 4.3E-09 1.8E-09 4.2E-09 NC 7.0E-01 NC 5.9E-09SG-3S SG-3 5 Methyl tert-butyl ether 0.0034 6.3E-06 2.1E-08 8.8E-09 2.1E-08 2.6E-04 3.0E+00 2.3E-12 6.9E-09SG-3S SG-3 5 Naphthalene 0.023 3.6E-06 8.4E-08 3.4E-08 8.0E-08 3.4E-02 3.0E-03 1.2E-09 2.7E-05SG-3S SG-3 5 Propylbenzene 0.032 3.7E-06 1.2E-07 4.9E-08 1.1E-07 NC 1.0E+00 NC 1.1E-07SG-3S SG-3 5 Styrene 0.00037 4.4E-06 1.6E-09 6.7E-10 1.6E-09 NC 9.0E-01 NC 1.7E-09SG-3S SG-3 5 Tetrachloroethene 0.0035 4.4E-06 1.6E-08 6.4E-09 1.5E-08 5.9E-03 3.5E-02 3.8E-11 4.3E-07SG-3S SG-3 5 Toluene 0.12 5.4E-06 6.4E-07 2.6E-07 6.2E-07 NC 3.0E-01 NC 2.1E-06SG-3S SG-3 5 Total Xylenes 0.2 5.2E-06 1.0E-06 4.3E-07 1.0E-06 NC 1.0E-01 NC 1.0E-05SG-3S SG-3 5 Trichloroethene 0.0021 4.9E-06 1.0E-08 4.2E-09 9.8E-09 2.0E-03 6.0E-01 8.4E-12 1.6E-08 1.5E-09 1.8E-04SG-3D SG-3 8 1,1-Difluoroethane 0.0013 3.9E-06 5.1E-09 2.1E-09 4.9E-09 NC 4.0E+01 NC 1.2E-10SG-3D SG-3 8 1,2,4-Trimethylbenzene 0.24 2.3E-06 5.6E-07 2.3E-07 5.4E-07 NC 7.0E-03 NC 7.7E-05SG-3D SG-3 8 1,3,5-Trimethylbenzene 0.088 2.3E-06 2.0E-07 8.4E-08 2.0E-07 NC 6.0E-03 NC 3.3E-05SG-3D SG-3 8 2-Butanone (Methyl Ethyl K 0.0026 3.1E-06 8.1E-09 3.3E-09 7.8E-09 NC 5.0E+00 NC 1.6E-09SG-3D SG-3 8 2-Hexanone 0.0042 2.7E-06 1.1E-08 4.7E-09 1.1E-08 NC 3.0E-02 NC 3.7E-07SG-3D SG-3 8 4-Ethyltoluene 0.31 2.6E-06 8.1E-07 3.3E-07 7.8E-07 NC 1.0E-01 NC 7.8E-06SG-3D SG-3 8 Acetone 0.018 4.8E-06 8.7E-08 3.6E-08 8.3E-08 NC 3.1E+01 NC 2.7E-09SG-3D SG-3 8 Benzene 0.0013 3.4E-06 4.4E-09 1.8E-09 4.2E-09 2.9E-02 3.0E-02 5.3E-11 1.4E-07SG-3D SG-3 8 Carbon Disulfide 0.0015 4.0E-06 6.0E-09 2.5E-09 5.8E-09 NC 7.0E-01 NC 8.2E-09SG-3D SG-3 8 Cumene 0.01 2.5E-06 2.5E-08 1.0E-08 2.4E-08 NC 4.0E-01 NC 6.0E-08SG-3D SG-3 8 Ethanol 0.0009 5.0E-06 4.5E-09 1.9E-09 4.4E-09 NC 1.1E+00 NC 4.1E-09SG-3D SG-3 8 Ethylbenzene 0.023 2.9E-06 6.6E-08 2.7E-08 6.4E-08 2.5E-03 1.0E+00 6.8E-11 6.4E-08SG-3D SG-3 8 Freon 11 0.0014 3.4E-06 4.7E-09 1.9E-09 4.5E-09 NC 7.0E-01 NC 6.4E-09SG-3D SG-3 8 Freon 12 0.000485 2.6E-06 1.2E-09 5.1E-10 1.2E-09 NC 2.0E-01 NC 6.0E-09SG-3D SG-3 8 Heptane 0.0017 2.7E-06 4.6E-09 1.9E-09 4.4E-09 NC 7.0E-01 NC 6.3E-09SG-3D SG-3 8 Methyl tert-butyl ether 0.00071 3.9E-06 2.8E-09 1.2E-09 2.7E-09 2.6E-04 3.0E+00 3.0E-13 9.0E-10SG-3D SG-3 8 Naphthalene 0.015 2.3E-06 3.4E-08 1.4E-08 3.3E-08 3.4E-02 3.0E-03 4.8E-10 1.1E-05SG-3D SG-3 8 Propylbenzene 0.048 2.3E-06 1.1E-07 4.6E-08 1.1E-07 NC 1.0E+00 NC 1.1E-07SG-3D SG-3 8 Styrene 0.000415 2.7E-06 1.1E-09 4.7E-10 1.1E-09 NC 9.0E-01 NC 1.2E-09SG-3D SG-3 8 Tetrachloroethene 0.009 2.8E-06 2.5E-08 1.0E-08 2.4E-08 5.9E-03 3.5E-02 6.1E-11 6.8E-07SG-3D SG-3 8 Toluene 0.036 3.4E-06 1.2E-07 5.0E-08 1.2E-07 NC 3.0E-01 NC 3.9E-07SG-3D SG-3 8 Total Xylenes 0.134 3.3E-06 4.4E-07 1.8E-07 4.2E-07 NC 1.0E-01 NC 4.2E-06SG-3D SG-3 8 Trichloroethene 0.0005 3.0E-06 1.5E-09 6.3E-10 1.5E-09 2.0E-03 6.0E-01 1.3E-12 2.4E-09 6.6E-10 1.3E-04
Lodi_HRA_Tables Page 3 of 7 IRIS ENVIRONMENTAL
Sample ID
Soil Gas Sample
Locationa
Sampling Depth
(feet bgs) Chemical
Soil Gas Concentration
(mg/m3)b
Transfer Factor
[(mg/m3)/(mg/m3)]c
Exposure Point
Concentration (EPC) in
Outdoor Air (mg/m3)d
Exposure Concentration (EC)
in Outdoor Air – Cancer Effects
(mg/m3)e
Exposure Concentration (EC)
in Outdoor Air– Noncancer
Effects (mg/m3)e
URF (mg/m3)-1
RfC (mg/m3)
Incremental Cancer
Risk from Vapors
in Outdoor Air(unitless)f
Noncancer Hazard
Quotient from Vapors
in Outdoor Air (unitless)f
Cumulative Cancer
Risk
Cumulative Noncancer
Hazard
TABLE 21OUTDOOR AIR INHALATION CANCER RISKS AND NONCANCER HAZARD INDICES FOR VOCS IN SOIL GAS:
CURRENT OFF-SITE AND FUTURE ON-SITE RESIDENTIAL SCENARIOSFormer Lodi Manufactured Gas Plant
Lodi, California
SG-4S SG-4 5 1,1-Difluoroethane 0.00205 6.3E-06 1.3E-08 5.3E-09 1.2E-08 NC 4.0E+01 NC 3.1E-10SG-4S SG-4 5 1,2,4-Trimethylbenzene 0.059 3.7E-06 2.2E-07 9.1E-08 2.1E-07 NC 7.0E-03 NC 3.0E-05SG-4S SG-4 5 1,3,5-Trimethylbenzene 0.029 3.7E-06 1.1E-07 4.4E-08 1.0E-07 NC 6.0E-03 NC 1.7E-05SG-4S SG-4 5 2-Butanone (Methyl Ethyl K 0.004 5.0E-06 2.0E-08 8.2E-09 1.9E-08 NC 5.0E+00 NC 3.8E-09SG-4S SG-4 5 2-Hexanone 0.0031 4.4E-06 1.3E-08 5.5E-09 1.3E-08 NC 3.0E-02 NC 4.3E-07SG-4S SG-4 5 4-Ethyltoluene 0.083 4.2E-06 3.5E-07 1.4E-07 3.3E-07 NC 1.0E-01 NC 3.3E-06SG-4S SG-4 5 Acetone 0.082 7.7E-06 6.3E-07 2.6E-07 6.1E-07 NC 3.1E+01 NC 2.0E-08SG-4S SG-4 5 Benzene 0.0046 5.4E-06 2.5E-08 1.0E-08 2.4E-08 2.9E-02 3.0E-02 3.0E-10 8.0E-07SG-4S SG-4 5 Carbon Disulfide 0.034 6.4E-06 2.2E-07 9.0E-08 2.1E-07 NC 7.0E-01 NC 3.0E-07SG-4S SG-4 5 Cumene 0.022 4.0E-06 8.8E-08 3.6E-08 8.4E-08 NC 4.0E-01 NC 2.1E-07SG-4S SG-4 5 Ethanol 0.00145 8.1E-06 1.2E-08 4.8E-09 1.1E-08 NC 1.1E+00 NC 1.1E-08SG-4S SG-4 5 Ethylbenzene 0.04 4.6E-06 1.8E-07 7.6E-08 1.8E-07 2.5E-03 1.0E+00 1.9E-10 1.8E-07SG-4S SG-4 5 Freon 11 0.0018 5.4E-06 9.6E-09 4.0E-09 9.3E-09 NC 7.0E-01 NC 1.3E-08SG-4S SG-4 5 Freon 12 0.00075 4.1E-06 3.1E-09 1.3E-09 2.9E-09 NC 2.0E-01 NC 1.5E-08SG-4S SG-4 5 Heptane 0.0006 4.3E-06 2.6E-09 1.1E-09 2.5E-09 NC 7.0E-01 NC 3.6E-09SG-4S SG-4 5 Methyl tert-butyl ether 0.0011 6.3E-06 6.9E-09 2.9E-09 6.7E-09 2.6E-04 3.0E+00 7.4E-13 2.2E-09SG-4S SG-4 5 Naphthalene 0.004 3.6E-06 1.5E-08 6.0E-09 1.4E-08 3.4E-02 3.0E-03 2.0E-10 4.7E-06SG-4S SG-4 5 Propylbenzene 0.012 3.7E-06 4.4E-08 1.8E-08 4.3E-08 NC 1.0E+00 NC 4.3E-08SG-4S SG-4 5 Styrene 0.00065 4.4E-06 2.8E-09 1.2E-09 2.7E-09 NC 9.0E-01 NC 3.0E-09SG-4S SG-4 5 Tetrachloroethene 0.0026 4.4E-06 1.2E-08 4.7E-09 1.1E-08 5.9E-03 3.5E-02 2.8E-11 3.2E-07SG-4S SG-4 5 Toluene 0.0069 5.4E-06 3.7E-08 1.5E-08 3.5E-08 NC 3.0E-01 NC 1.2E-07SG-4S SG-4 5 Total Xylenes 0.252 5.2E-06 1.3E-06 5.4E-07 1.3E-06 NC 1.0E-01 NC 1.3E-05SG-4S SG-4 5 Trichloroethene 0.0062 4.9E-06 3.0E-08 1.2E-08 2.9E-08 2.0E-03 6.0E-01 2.5E-11 4.8E-08 7.4E-10 7.1E-05SG-4D SG-4 8 1,1-Difluoroethane 0.011 3.9E-06 4.3E-08 1.8E-08 4.2E-08 NC 4.0E+01 NC 1.0E-09SG-4D SG-4 8 1,2,4-Trimethylbenzene 0.045 2.3E-06 1.1E-07 4.3E-08 1.0E-07 NC 7.0E-03 NC 1.4E-05SG-4D SG-4 8 1,3,5-Trimethylbenzene 0.026 2.3E-06 6.0E-08 2.5E-08 5.8E-08 NC 6.0E-03 NC 9.7E-06SG-4D SG-4 8 2-Butanone (Methyl Ethyl K 0.0078 3.1E-06 2.4E-08 1.0E-08 2.3E-08 NC 5.0E+00 NC 4.7E-09SG-4D SG-4 8 2-Hexanone 0.017 2.7E-06 4.6E-08 1.9E-08 4.4E-08 NC 3.0E-02 NC 1.5E-06SG-4D SG-4 8 4-Ethyltoluene 0.072 2.6E-06 1.9E-07 7.8E-08 1.8E-07 NC 1.0E-01 NC 1.8E-06SG-4D SG-4 8 Acetone 0.21 4.8E-06 1.0E-06 4.2E-07 9.7E-07 NC 3.1E+01 NC 3.1E-08SG-4D SG-4 8 Benzene 0.0075 3.4E-06 2.5E-08 1.0E-08 2.4E-08 2.9E-02 3.0E-02 3.0E-10 8.1E-07SG-4D SG-4 8 Carbon Disulfide 0.013 4.0E-06 5.2E-08 2.1E-08 5.0E-08 NC 7.0E-01 NC 7.1E-08SG-4D SG-4 8 Cumene 0.027 2.5E-06 6.8E-08 2.8E-08 6.5E-08 NC 4.0E-01 NC 1.6E-07SG-4D SG-4 8 Ethanol 0.008 5.0E-06 4.0E-08 1.7E-08 3.9E-08 NC 1.1E+00 NC 3.7E-08SG-4D SG-4 8 Ethylbenzene 0.042 2.9E-06 1.2E-07 5.0E-08 1.2E-07 2.5E-03 1.0E+00 1.2E-10 1.2E-07SG-4D SG-4 8 Freon 11 0.0047 3.4E-06 1.6E-08 6.5E-09 1.5E-08 NC 7.0E-01 NC 2.2E-08SG-4D SG-4 8 Freon 12 0.0041 2.6E-06 1.0E-08 4.3E-09 1.0E-08 NC 2.0E-01 NC 5.0E-08SG-4D SG-4 8 Heptane 0.0034 2.7E-06 9.2E-09 3.8E-09 8.8E-09 NC 7.0E-01 NC 1.3E-08SG-4D SG-4 8 Methyl tert-butyl ether 0.006 3.9E-06 2.4E-08 9.7E-09 2.3E-08 2.6E-04 3.0E+00 2.5E-12 7.6E-09SG-4D SG-4 8 Naphthalene 0.022 2.3E-06 5.0E-08 2.1E-08 4.8E-08 3.4E-02 3.0E-03 7.0E-10 1.6E-05SG-4D SG-4 8 Propylbenzene 0.01 2.3E-06 2.3E-08 9.5E-09 2.2E-08 NC 1.0E+00 NC 2.2E-08SG-4D SG-4 8 Styrene 0.00355 2.7E-06 9.7E-09 4.0E-09 9.3E-09 NC 9.0E-01 NC 1.0E-08SG-4D SG-4 8 Tetrachloroethene 0.0055 2.8E-06 1.5E-08 6.3E-09 1.5E-08 5.9E-03 3.5E-02 3.7E-11 4.2E-07SG-4D SG-4 8 Toluene 0.0099 3.4E-06 3.3E-08 1.4E-08 3.2E-08 NC 3.0E-01 NC 1.1E-07SG-4D SG-4 8 Total Xylenes 0.25 3.3E-06 8.2E-07 3.4E-07 7.8E-07 NC 1.0E-01 NC 7.8E-06SG-4D SG-4 8 Trichloroethene 0.0045 3.0E-06 1.4E-08 5.6E-09 1.3E-08 2.0E-03 6.0E-01 1.1E-11 2.2E-08 1.2E-09 5.3E-05
Lodi_HRA_Tables Page 4 of 7 IRIS ENVIRONMENTAL
Sample ID
Soil Gas Sample
Locationa
Sampling Depth
(feet bgs) Chemical
Soil Gas Concentration
(mg/m3)b
Transfer Factor
[(mg/m3)/(mg/m3)]c
Exposure Point
Concentration (EPC) in
Outdoor Air (mg/m3)d
Exposure Concentration (EC)
in Outdoor Air – Cancer Effects
(mg/m3)e
Exposure Concentration (EC)
in Outdoor Air– Noncancer
Effects (mg/m3)e
URF (mg/m3)-1
RfC (mg/m3)
Incremental Cancer
Risk from Vapors
in Outdoor Air(unitless)f
Noncancer Hazard
Quotient from Vapors
in Outdoor Air (unitless)f
Cumulative Cancer
Risk
Cumulative Noncancer
Hazard
TABLE 21OUTDOOR AIR INHALATION CANCER RISKS AND NONCANCER HAZARD INDICES FOR VOCS IN SOIL GAS:
CURRENT OFF-SITE AND FUTURE ON-SITE RESIDENTIAL SCENARIOSFormer Lodi Manufactured Gas Plant
Lodi, California
SG-5S SG-5 5 1,1-Difluoroethane 0.0055 6.3E-06 3.5E-08 1.4E-08 3.3E-08 NC 4.0E+01 NC 8.3E-10SG-5S SG-5 5 1,2,4-Trimethylbenzene 0.066 3.7E-06 2.5E-07 1.0E-07 2.4E-07 NC 7.0E-03 NC 3.4E-05SG-5S SG-5 5 1,3,5-Trimethylbenzene 0.026 3.7E-06 9.6E-08 4.0E-08 9.2E-08 NC 6.0E-03 NC 1.6E-05SG-5S SG-5 5 2-Butanone (Methyl Ethyl K 0.0044 5.0E-06 2.2E-08 9.1E-09 2.1E-08 NC 5.0E+00 NC 4.2E-09SG-5S SG-5 5 2-Hexanone 0.0085 4.4E-06 3.7E-08 1.5E-08 3.5E-08 NC 3.0E-02 NC 1.2E-06SG-5S SG-5 5 4-Ethyltoluene 0.066 4.2E-06 2.8E-07 1.1E-07 2.7E-07 NC 1.0E-01 NC 2.7E-06SG-5S SG-5 5 Acetone 0.18 7.7E-06 1.4E-06 5.7E-07 1.3E-06 NC 3.1E+01 NC 4.3E-08SG-5S SG-5 5 Benzene 0.00135 5.4E-06 7.3E-09 3.0E-09 7.0E-09 2.9E-02 3.0E-02 8.7E-11 2.3E-07SG-5S SG-5 5 Carbon Disulfide 0.0065 6.4E-06 4.2E-08 1.7E-08 4.0E-08 NC 7.0E-01 NC 5.7E-08SG-5S SG-5 5 Cumene 0.0056 4.0E-06 2.2E-08 9.2E-09 2.2E-08 NC 4.0E-01 NC 5.4E-08SG-5S SG-5 5 Ethanol 0.00395 8.1E-06 3.2E-08 1.3E-08 3.1E-08 NC 1.1E+00 NC 2.9E-08SG-5S SG-5 5 Ethylbenzene 0.0037 4.6E-06 1.7E-08 7.0E-09 1.6E-08 2.5E-03 1.0E+00 1.8E-11 1.6E-08SG-5S SG-5 5 Freon 11 0.00235 5.4E-06 1.3E-08 5.2E-09 1.2E-08 NC 7.0E-01 NC 1.7E-08SG-5S SG-5 5 Freon 12 0.0021 4.1E-06 8.6E-09 3.5E-09 8.3E-09 NC 2.0E-01 NC 4.1E-08SG-5S SG-5 5 Heptane 0.0017 4.3E-06 7.4E-09 3.0E-09 7.1E-09 NC 7.0E-01 NC 1.0E-08SG-5S SG-5 5 Methyl tert-butyl ether 0.0015 6.3E-06 9.5E-09 3.9E-09 9.1E-09 2.6E-04 3.0E+00 1.0E-12 3.0E-09SG-5S SG-5 5 Naphthalene 0.011 3.6E-06 4.0E-08 1.6E-08 3.8E-08 3.4E-02 3.0E-03 5.6E-10 1.3E-05SG-5S SG-5 5 Propylbenzene 0.0096 3.7E-06 3.6E-08 1.5E-08 3.4E-08 NC 1.0E+00 NC 3.4E-08SG-5S SG-5 5 Styrene 0.0018 4.4E-06 7.9E-09 3.2E-09 7.6E-09 NC 9.0E-01 NC 8.4E-09SG-5S SG-5 5 Tetrachloroethene 0.00285 4.4E-06 1.3E-08 5.2E-09 1.2E-08 5.9E-03 3.5E-02 3.1E-11 3.5E-07SG-5S SG-5 5 Toluene 0.036 5.4E-06 1.9E-07 7.9E-08 1.9E-07 NC 3.0E-01 NC 6.2E-07SG-5S SG-5 5 Total Xylenes 0.0263 5.2E-06 1.4E-07 5.7E-08 1.3E-07 NC 1.0E-01 NC 1.3E-06SG-5S SG-5 5 Trichloroethene 0.00225 4.9E-06 1.1E-08 4.5E-09 1.1E-08 2.0E-03 6.0E-01 9.0E-12 1.8E-08 7.0E-10 6.9E-05SG-5D SG-5 8 1,1-Difluoroethane 0.0051 3.9E-06 2.0E-08 8.3E-09 1.9E-08 NC 4.0E+01 NC 4.8E-10SG-5D SG-5 8 1,2,4-Trimethylbenzene 0.12 2.3E-06 2.8E-07 1.2E-07 2.7E-07 NC 7.0E-03 NC 3.8E-05SG-5D SG-5 8 1,3,5-Trimethylbenzene 0.05 2.3E-06 1.2E-07 4.8E-08 1.1E-07 NC 6.0E-03 NC 1.9E-05SG-5D SG-5 8 2-Butanone (Methyl Ethyl K 0.0081 3.1E-06 2.5E-08 1.0E-08 2.4E-08 NC 5.0E+00 NC 4.9E-09SG-5D SG-5 8 2-Hexanone 0.009 2.7E-06 2.4E-08 1.0E-08 2.3E-08 NC 3.0E-02 NC 7.8E-07SG-5D SG-5 8 4-Ethyltoluene 0.11 2.6E-06 2.9E-07 1.2E-07 2.8E-07 NC 1.0E-01 NC 2.8E-06SG-5D SG-5 8 Acetone 0.25 4.8E-06 1.2E-06 4.9E-07 1.2E-06 NC 3.1E+01 NC 3.7E-08SG-5D SG-5 8 Benzene 0.0014 3.4E-06 4.7E-09 1.9E-09 4.5E-09 2.9E-02 3.0E-02 5.7E-11 1.5E-07SG-5D SG-5 8 Carbon Disulfide 0.007 4.0E-06 2.8E-08 1.2E-08 2.7E-08 NC 7.0E-01 NC 3.8E-08SG-5D SG-5 8 Cumene 0.0022 2.5E-06 5.5E-09 2.3E-09 5.3E-09 NC 4.0E-01 NC 1.3E-08SG-5D SG-5 8 Ethanol 0.016 5.0E-06 8.1E-08 3.3E-08 7.7E-08 NC 1.1E+00 NC 7.4E-08SG-5D SG-5 8 Ethylbenzene 0.00195 2.9E-06 5.6E-09 2.3E-09 5.4E-09 2.5E-03 1.0E+00 5.8E-12 5.4E-09SG-5D SG-5 8 Freon 11 0.0025 3.4E-06 8.4E-09 3.4E-09 8.0E-09 NC 7.0E-01 NC 1.1E-08SG-5D SG-5 8 Freon 12 0.0022 2.6E-06 5.6E-09 2.3E-09 5.4E-09 NC 2.0E-01 NC 2.7E-08SG-5D SG-5 8 Heptane 0.00185 2.7E-06 5.0E-09 2.1E-09 4.8E-09 NC 7.0E-01 NC 6.9E-09SG-5D SG-5 8 Methyl tert-butyl ether 0.0016 3.9E-06 6.3E-09 2.6E-09 6.1E-09 2.6E-04 3.0E+00 6.7E-13 2.0E-09SG-5D SG-5 8 Naphthalene 0.0115 2.3E-06 2.6E-08 1.1E-08 2.5E-08 3.4E-02 3.0E-03 3.7E-10 8.4E-06SG-5D SG-5 8 Propylbenzene 0.016 2.3E-06 3.7E-08 1.5E-08 3.6E-08 NC 1.0E+00 NC 3.6E-08SG-5D SG-5 8 Styrene 0.0019 2.7E-06 5.2E-09 2.1E-09 5.0E-09 NC 9.0E-01 NC 5.5E-09SG-5D SG-5 8 Tetrachloroethene 0.00305 2.8E-06 8.5E-09 3.5E-09 8.1E-09 5.9E-03 3.5E-02 2.1E-11 2.3E-07SG-5D SG-5 8 Toluene 0.051 3.4E-06 1.7E-07 7.0E-08 1.6E-07 NC 3.0E-01 NC 5.5E-07SG-5D SG-5 8 Total Xylenes 0.0198 3.3E-06 6.5E-08 2.7E-08 6.2E-08 NC 1.0E-01 NC 6.2E-07SG-5D SG-5 8 Trichloroethene 0.0024 3.0E-06 7.3E-09 3.0E-09 7.0E-09 2.0E-03 6.0E-01 6.0E-12 1.2E-08 4.5E-10 7.1E-05
Lodi_HRA_Tables Page 5 of 7 IRIS ENVIRONMENTAL
Sample ID
Soil Gas Sample
Locationa
Sampling Depth
(feet bgs) Chemical
Soil Gas Concentration
(mg/m3)b
Transfer Factor
[(mg/m3)/(mg/m3)]c
Exposure Point
Concentration (EPC) in
Outdoor Air (mg/m3)d
Exposure Concentration (EC)
in Outdoor Air – Cancer Effects
(mg/m3)e
Exposure Concentration (EC)
in Outdoor Air– Noncancer
Effects (mg/m3)e
URF (mg/m3)-1
RfC (mg/m3)
Incremental Cancer
Risk from Vapors
in Outdoor Air(unitless)f
Noncancer Hazard
Quotient from Vapors
in Outdoor Air (unitless)f
Cumulative Cancer
Risk
Cumulative Noncancer
Hazard
TABLE 21OUTDOOR AIR INHALATION CANCER RISKS AND NONCANCER HAZARD INDICES FOR VOCS IN SOIL GAS:
CURRENT OFF-SITE AND FUTURE ON-SITE RESIDENTIAL SCENARIOSFormer Lodi Manufactured Gas Plant
Lodi, California
SG-6S SG-6 5 1,1-Difluoroethane 0.006 6.3E-06 3.8E-08 1.6E-08 3.6E-08 NC 4.0E+01 NC 9.1E-10SG-6S SG-6 5 1,2,4-Trimethylbenzene 0.011 3.7E-06 4.1E-08 1.7E-08 3.9E-08 NC 7.0E-03 NC 5.6E-06SG-6S SG-6 5 1,3,5-Trimethylbenzene 0.0021 3.7E-06 7.8E-09 3.2E-09 7.5E-09 NC 6.0E-03 NC 1.3E-06SG-6S SG-6 5 2-Butanone (Methyl Ethyl K 0.004 5.0E-06 2.0E-08 8.2E-09 1.9E-08 NC 5.0E+00 NC 3.8E-09SG-6S SG-6 5 2-Hexanone 0.009 4.4E-06 3.9E-08 1.6E-08 3.8E-08 NC 3.0E-02 NC 1.3E-06SG-6S SG-6 5 4-Ethyltoluene 0.008 4.2E-06 3.4E-08 1.4E-08 3.2E-08 NC 1.0E-01 NC 3.2E-07SG-6S SG-6 5 Acetone 0.03 7.7E-06 2.3E-07 9.5E-08 2.2E-07 NC 3.1E+01 NC 7.1E-09SG-6S SG-6 5 Benzene 0.00135 5.4E-06 7.3E-09 3.0E-09 7.0E-09 2.9E-02 3.0E-02 8.7E-11 2.3E-07SG-6S SG-6 5 Carbon Disulfide 0.0065 6.4E-06 4.2E-08 1.7E-08 4.0E-08 NC 7.0E-01 NC 5.7E-08SG-6S SG-6 5 Cumene 0.0021 4.0E-06 8.4E-09 3.5E-09 8.1E-09 NC 4.0E-01 NC 2.0E-08SG-6S SG-6 5 Ethanol 0.004 8.1E-06 3.2E-08 1.3E-08 3.1E-08 NC 1.1E+00 NC 2.9E-08SG-6S SG-6 5 Ethylbenzene 0.037 4.6E-06 1.7E-07 7.0E-08 1.6E-07 2.5E-03 1.0E+00 1.8E-10 1.6E-07SG-6S SG-6 5 Freon 11 0.0024 5.4E-06 1.3E-08 5.3E-09 1.2E-08 NC 7.0E-01 NC 1.8E-08SG-6S SG-6 5 Freon 12 0.0021 4.1E-06 8.6E-09 3.5E-09 8.3E-09 NC 2.0E-01 NC 4.1E-08SG-6S SG-6 5 Heptane 0.0076 4.3E-06 3.3E-08 1.4E-08 3.2E-08 NC 7.0E-01 NC 4.5E-08SG-6S SG-6 5 Methyl tert-butyl ether 0.00155 6.3E-06 9.8E-09 4.0E-09 9.4E-09 2.6E-04 3.0E+00 1.0E-12 3.1E-09SG-6S SG-6 5 Naphthalene 0.011 3.6E-06 4.0E-08 1.6E-08 3.8E-08 3.4E-02 3.0E-03 5.6E-10 1.3E-05SG-6S SG-6 5 Propylbenzene 0.0021 3.7E-06 7.8E-09 3.2E-09 7.5E-09 NC 1.0E+00 NC 7.5E-09SG-6S SG-6 5 Styrene 0.0018 4.4E-06 7.9E-09 3.2E-09 7.6E-09 NC 9.0E-01 NC 8.4E-09SG-6S SG-6 5 Tetrachloroethene 0.0029 4.4E-06 1.3E-08 5.3E-09 1.2E-08 5.9E-03 3.5E-02 3.1E-11 3.5E-07SG-6S SG-6 5 Toluene 0.57 5.4E-06 3.1E-06 1.3E-06 2.9E-06 NC 3.0E-01 NC 9.8E-06SG-6S SG-6 5 Total Xylenes 0.182 5.2E-06 9.5E-07 3.9E-07 9.1E-07 NC 1.0E-01 NC 9.1E-06SG-6S SG-6 5 Trichloroethene 0.0023 4.9E-06 1.1E-08 4.6E-09 1.1E-08 2.0E-03 6.0E-01 9.2E-12 1.8E-08 8.6E-10 4.1E-05SG-6D SG-6 8 1,1-Difluoroethane 0.0115 3.9E-06 4.5E-08 1.9E-08 4.3E-08 NC 4.0E+01 NC 1.1E-09SG-6D SG-6 8 1,2,4-Trimethylbenzene 0.016 2.3E-06 3.7E-08 1.5E-08 3.6E-08 NC 7.0E-03 NC 5.1E-06SG-6D SG-6 8 1,3,5-Trimethylbenzene 0.0041 2.3E-06 9.5E-09 3.9E-09 9.1E-09 NC 6.0E-03 NC 1.5E-06SG-6D SG-6 8 2-Butanone (Methyl Ethyl K 0.0069 3.1E-06 2.2E-08 8.9E-09 2.1E-08 NC 5.0E+00 NC 4.1E-09SG-6D SG-6 8 2-Hexanone 0.017 2.7E-06 4.6E-08 1.9E-08 4.4E-08 NC 3.0E-02 NC 1.5E-06SG-6D SG-6 8 4-Ethyltoluene 0.012 2.6E-06 3.1E-08 1.3E-08 3.0E-08 NC 1.0E-01 NC 3.0E-07SG-6D SG-6 8 Acetone 0.06 4.8E-06 2.9E-07 1.2E-07 2.8E-07 NC 3.1E+01 NC 8.9E-09SG-6D SG-6 8 Benzene 0.0027 3.4E-06 9.2E-09 3.8E-09 8.8E-09 2.9E-02 3.0E-02 1.1E-10 2.9E-07SG-6D SG-6 8 Carbon Disulfide 0.013 4.0E-06 5.2E-08 2.1E-08 5.0E-08 NC 7.0E-01 NC 7.1E-08SG-6D SG-6 8 Cumene 0.0041 2.5E-06 1.0E-08 4.2E-09 9.8E-09 NC 4.0E-01 NC 2.5E-08SG-6D SG-6 8 Ethanol 0.008 5.0E-06 4.0E-08 1.7E-08 3.9E-08 NC 1.1E+00 NC 3.7E-08SG-6D SG-6 8 Ethylbenzene 0.069 2.9E-06 2.0E-07 8.2E-08 1.9E-07 2.5E-03 1.0E+00 2.0E-10 1.9E-07SG-6D SG-6 8 Freon 11 0.0047 3.4E-06 1.6E-08 6.5E-09 1.5E-08 NC 7.0E-01 NC 2.2E-08SG-6D SG-6 8 Freon 12 0.00415 2.6E-06 1.1E-08 4.4E-09 1.0E-08 NC 2.0E-01 NC 5.1E-08SG-6D SG-6 8 Heptane 0.013 2.7E-06 3.5E-08 1.4E-08 3.4E-08 NC 7.0E-01 NC 4.8E-08SG-6D SG-6 8 Methyl tert-butyl ether 0.003 3.9E-06 1.2E-08 4.9E-09 1.1E-08 2.6E-04 3.0E+00 1.3E-12 3.8E-09SG-6D SG-6 8 Naphthalene 0.022 2.3E-06 5.0E-08 2.1E-08 4.8E-08 3.4E-02 3.0E-03 7.0E-10 1.6E-05SG-6D SG-6 8 Propylbenzene 0.0041 2.3E-06 9.5E-09 3.9E-09 9.1E-09 NC 1.0E+00 NC 9.1E-09SG-6D SG-6 8 Styrene 0.0036 2.7E-06 9.8E-09 4.0E-09 9.4E-09 NC 9.0E-01 NC 1.0E-08SG-6D SG-6 8 Tetrachloroethene 0.0055 2.8E-06 1.5E-08 6.3E-09 1.5E-08 5.9E-03 3.5E-02 3.7E-11 4.2E-07SG-6D SG-6 8 Toluene 1.0 3.4E-06 3.4E-06 1.4E-06 3.2E-06 NC 3.0E-01 NC 1.1E-05SG-6D SG-6 8 Total Xylenes 0.34 3.3E-06 1.1E-06 4.6E-07 1.1E-06 NC 1.0E-01 NC 1.1E-05SG-6D SG-6 8 Trichloroethene 0.0045 3.0E-06 1.4E-08 5.6E-09 1.3E-08 2.0E-03 6.0E-01 1.1E-11 2.2E-08 1.1E-10 8.9E-06
Lodi_HRA_Tables Page 6 of 7 IRIS ENVIRONMENTAL
Sample ID
Soil Gas Sample
Locationa
Sampling Depth
(feet bgs) Chemical
Soil Gas Concentration
(mg/m3)b
Transfer Factor
[(mg/m3)/(mg/m3)]c
Exposure Point
Concentration (EPC) in
Outdoor Air (mg/m3)d
Exposure Concentration (EC)
in Outdoor Air – Cancer Effects
(mg/m3)e
Exposure Concentration (EC)
in Outdoor Air– Noncancer
Effects (mg/m3)e
URF (mg/m3)-1
RfC (mg/m3)
Incremental Cancer
Risk from Vapors
in Outdoor Air(unitless)f
Noncancer Hazard
Quotient from Vapors
in Outdoor Air (unitless)f
Cumulative Cancer
Risk
Cumulative Noncancer
Hazard
TABLE 21OUTDOOR AIR INHALATION CANCER RISKS AND NONCANCER HAZARD INDICES FOR VOCS IN SOIL GAS:
CURRENT OFF-SITE AND FUTURE ON-SITE RESIDENTIAL SCENARIOSFormer Lodi Manufactured Gas Plant
Lodi, California
Site-wide Average 1.9E-09 1.4E-04
Notes:
bgs = below ground surface
NC = Not considered to be a carcinogen.
mg/m3 = micrograms per cubic meter
f Incremental cancer risks and noncancer hazard quotients were calculated using equations presented in Table 5 and exposure parameters presented in Table 4.
a All locations and depths are included.b Measured chemical concentration in soil gas. Detected results are presented in bold. Non-detect results are represented by one-half the laboratory reporting limit; non-detect results are included if the chemical was detected in at least one site soil gas sample. In the case of non-detect results in both duplicate and primary samples, one-half of the lower of the two detection limits was evaluated.c The transfer factor represents the relationship between the chemical concentration in soil gas and the chemical concentration in outdoor air (resulting from volatilization from soil gas into outdoor air). The methodology used in the calculation of transfer factors is presented in Attachment D.d The exposure point concentration (EPC) in outdoor air is the actual concentration the receptor is exposed to while in outdoor air. e The exposure concentrations (ECs) are analagous to chronic daily intakes (CDIs).
Lodi_HRA_Tables Page 7 of 7 IRIS ENVIRONMENTAL
Sample ID
Soil Gas Sample
Locationa
Sampling Depth
(feet bgs) Chemical
Soil Gas Concentration
(mg/m3)b
Transfer Factor
[(mg/m3)/(mg/m3)]c
Exposure Point
Concentration (EPC) in
Outdoor Air (mg/m3)d
Exposure Concentration (EC)
in Outdoor Air – Cancer Effects
(mg/m3)e
Exposure Concentration (EC)
in Outdoor Air– Noncancer
Effects (mg/m3)e
URF (mg/m3)-1
RfC (mg/m3)
Incremental Cancer
Risk from Vapors
in Outdoor Air(unitless)f
Noncancer Hazard
Quotient from Vapors
in Outdoor Air (unitless)f
Cumulative
Cancer Risk
Cumulative Noncancer
Hazard SG-1S SG-1 5 1,1-Difluoroethane 0.0019 6.3E-06 1.2E-08 9.8E-10 2.7E-09 NC 4.0E+01 NC 6.8E-11SG-1S SG-1 5 1,2,4-Trimethylbenzene 0.14 3.7E-06 5.2E-07 4.3E-08 1.2E-07 NC 7.0E-03 NC 1.7E-05SG-1S SG-1 5 1,3,5-Trimethylbenzene 0.066 3.7E-06 2.4E-07 2.0E-08 5.6E-08 NC 6.0E-03 NC 9.4E-06SG-1S SG-1 5 2-Butanone (Methyl Ethyl K 0.0053 5.0E-06 2.7E-08 2.2E-09 6.1E-09 NC 5.0E+00 NC 1.2E-09SG-1S SG-1 5 2-Hexanone 0.0029 4.4E-06 1.3E-08 1.0E-09 2.9E-09 NC 3.0E-02 NC 9.6E-08SG-1S SG-1 5 4-Ethyltoluene 0.16 4.2E-06 6.7E-07 5.5E-08 1.5E-07 NC 1.0E-01 NC 1.5E-06SG-1S SG-1 5 Acetone 0.068 7.7E-06 5.2E-07 4.3E-08 1.2E-07 NC 3.1E+01 NC 3.9E-09SG-1S SG-1 5 Benzene 0.0017 5.4E-06 9.2E-09 7.5E-10 2.1E-09 2.9E-02 3.0E-02 2.2E-11 7.0E-08SG-1S SG-1 5 Carbon Disulfide 0.0022 6.4E-06 1.4E-08 1.1E-09 3.2E-09 NC 7.0E-01 NC 4.6E-09SG-1S SG-1 5 Cumene 0.0058 4.0E-06 2.3E-08 1.9E-09 5.3E-09 NC 4.0E-01 NC 1.3E-08SG-1S SG-1 5 Ethanol 0.0032 8.1E-06 2.6E-08 2.1E-09 5.9E-09 NC 1.1E+00 NC 5.6E-09SG-1S SG-1 5 Ethylbenzene 0.052 4.6E-06 2.4E-07 2.0E-08 5.5E-08 2.5E-03 1.0E+00 4.9E-11 5.5E-08SG-1S SG-1 5 Freon 11 0.0008 5.4E-06 4.3E-09 3.5E-10 9.8E-10 NC 7.0E-01 NC 1.4E-09SG-1S SG-1 5 Freon 12 0.0014 4.1E-06 5.7E-09 4.7E-10 1.3E-09 NC 2.0E-01 NC 6.5E-09SG-1S SG-1 5 Heptane 0.0006 4.3E-06 2.6E-09 2.1E-10 5.9E-10 NC 7.0E-01 NC 8.5E-10SG-1S SG-1 5 Methyl tert-butyl ether 0.001 6.3E-06 6.3E-09 5.1E-10 1.4E-09 2.6E-04 3.0E+00 1.3E-13 4.8E-10SG-1S SG-1 5 Naphthalene 0.00375 3.6E-06 1.4E-08 1.1E-09 3.1E-09 3.4E-02 3.0E-03 3.8E-11 1.0E-06SG-1S SG-1 5 Propylbenzene 0.021 3.7E-06 7.8E-08 6.3E-09 1.8E-08 NC 1.0E+00 NC 1.8E-08SG-1S SG-1 5 Styrene 0.0006 4.4E-06 2.6E-09 2.1E-10 6.0E-10 NC 9.0E-01 NC 6.7E-10SG-1S SG-1 5 Tetrachloroethene 0.0021 4.4E-06 9.3E-09 7.6E-10 2.1E-09 5.9E-03 3.5E-02 4.5E-12 6.1E-08SG-1S SG-1 5 Toluene 0.011 5.4E-06 5.9E-08 4.8E-09 1.3E-08 NC 3.0E-01 NC 4.5E-08SG-1S SG-1 5 Total Xylenes 0.311 5.2E-06 1.6E-06 1.3E-07 3.7E-07 NC 1.0E-01 NC 3.7E-06SG-1S SG-1 5 Trichloroethene 0.00075 4.9E-06 3.7E-09 3.0E-10 8.3E-10 2.0E-03 6.0E-01 6.0E-13 1.4E-09 1.1E-10 3.3E-05SG-1D SG-1 8 1,1-Difluoroethane 0.0029 3.9E-06 1.1E-08 9.3E-10 2.6E-09 NC 4.0E+01 NC 6.5E-11SG-1D SG-1 8 1,2,4-Trimethylbenzene 0.21 2.3E-06 4.9E-07 4.0E-08 1.1E-07 NC 7.0E-03 NC 1.6E-05SG-1D SG-1 8 1,3,5-Trimethylbenzene 0.091 2.3E-06 2.1E-07 1.7E-08 4.8E-08 NC 6.0E-03 NC 8.1E-06SG-1D SG-1 8 2-Butanone (Methyl Ethyl K 0.0039 3.1E-06 1.2E-08 1.0E-09 2.8E-09 NC 5.0E+00 NC 5.6E-10SG-1D SG-1 8 2-Hexanone 0.0044 2.7E-06 1.2E-08 9.8E-10 2.7E-09 NC 3.0E-02 NC 9.1E-08SG-1D SG-1 8 4-Ethyltoluene 0.22 2.6E-06 5.8E-07 4.7E-08 1.3E-07 NC 1.0E-01 NC 1.3E-06SG-1D SG-1 8 Acetone 0.078 4.8E-06 3.8E-07 3.1E-08 8.6E-08 NC 3.1E+01 NC 2.8E-09SG-1D SG-1 8 Benzene 0.0022 3.4E-06 7.5E-09 6.1E-10 1.7E-09 2.9E-02 3.0E-02 1.8E-11 5.7E-08SG-1D SG-1 8 Carbon Disulfide 0.00335 4.0E-06 1.3E-08 1.1E-09 3.1E-09 NC 7.0E-01 NC 4.4E-09SG-1D SG-1 8 Cumene 0.008 2.5E-06 2.0E-08 1.6E-09 4.6E-09 NC 4.0E-01 NC 1.1E-08SG-1D SG-1 8 Ethanol 0.002 5.0E-06 1.0E-08 8.2E-10 2.3E-09 NC 1.1E+00 NC 2.2E-09SG-1D SG-1 8 Ethylbenzene 0.071 2.9E-06 2.1E-07 1.7E-08 4.7E-08 2.5E-03 1.0E+00 4.2E-11 4.7E-08SG-1D SG-1 8 Freon 11 0.0012 3.4E-06 4.0E-09 3.3E-10 9.2E-10 NC 7.0E-01 NC 1.3E-09SG-1D SG-1 8 Freon 12 0.00105 2.6E-06 2.7E-09 2.2E-10 6.1E-10 NC 2.0E-01 NC 3.1E-09SG-1D SG-1 8 Heptane 0.0009 2.7E-06 2.4E-09 2.0E-10 5.6E-10 NC 7.0E-01 NC 8.0E-10SG-1D SG-1 8 Methyl tert-butyl ether 0.00075 3.9E-06 3.0E-09 2.4E-10 6.8E-10 2.6E-04 3.0E+00 6.3E-14 2.3E-10SG-1D SG-1 8 Naphthalene 0.0055 2.3E-06 1.3E-08 1.0E-09 2.9E-09 3.4E-02 3.0E-03 3.5E-11 9.5E-07SG-1D SG-1 8 Propylbenzene 0.028 2.3E-06 6.5E-08 5.3E-09 1.5E-08 NC 1.0E+00 NC 1.5E-08SG-1D SG-1 8 Styrene 0.005 2.7E-06 1.4E-08 1.1E-09 3.1E-09 NC 9.0E-01 NC 3.5E-09SG-1D SG-1 8 Tetrachloroethene 0.0039 2.8E-06 1.1E-08 8.8E-10 2.5E-09 5.9E-03 3.5E-02 5.2E-12 7.1E-08SG-1D SG-1 8 Toluene 0.013 3.4E-06 4.4E-08 3.6E-09 9.9E-09 NC 3.0E-01 NC 3.3E-08SG-1D SG-1 8 Total Xylenes 0.459 3.3E-06 1.5E-06 1.2E-07 3.4E-07 NC 1.0E-01 NC 3.4E-06SG-1D SG-1 8 Trichloroethene 0.00115 3.0E-06 3.5E-09 2.9E-10 8.0E-10 2.0E-03 6.0E-01 5.7E-13 1.3E-09 1.0E-10 3.0E-05
TABLE 22OUTDOOR AIR INHALATION CANCER RISKS AND NONCANCER HAZARD INDICES FOR VOCS IN SOIL GAS:
CURRENT OFF-SITE COMMERCIAL SCENARIOFormer Lodi Manufactured Gas Plant
Lodi, California
Lodi_HRA_Tables Page 1 of 7 IRIS ENVIRONMENTAL
Sample ID
Soil Gas Sample
Locationa
Sampling Depth
(feet bgs) Chemical
Soil Gas Concentration
(mg/m3)b
Transfer Factor
[(mg/m3)/(mg/m3)]c
Exposure Point
Concentration (EPC) in
Outdoor Air (mg/m3)d
Exposure Concentration (EC)
in Outdoor Air – Cancer Effects
(mg/m3)e
Exposure Concentration (EC)
in Outdoor Air– Noncancer
Effects (mg/m3)e
URF (mg/m3)-1
RfC (mg/m3)
Incremental Cancer
Risk from Vapors
in Outdoor Air(unitless)f
Noncancer Hazard
Quotient from Vapors
in Outdoor Air (unitless)f
Cumulative
Cancer Risk
Cumulative Noncancer
Hazard
TABLE 22OUTDOOR AIR INHALATION CANCER RISKS AND NONCANCER HAZARD INDICES FOR VOCS IN SOIL GAS:
CURRENT OFF-SITE COMMERCIAL SCENARIOFormer Lodi Manufactured Gas Plant
Lodi, California
SG-2S SG-2 5 1,1-Difluoroethane 0.026 6.3E-06 1.6E-07 1.3E-08 3.7E-08 NC 4.0E+01 NC 9.4E-10SG-2S SG-2 5 1,2,4-Trimethylbenzene 0.12 3.7E-06 4.5E-07 3.7E-08 1.0E-07 NC 7.0E-03 NC 1.5E-05SG-2S SG-2 5 1,3,5-Trimethylbenzene 0.041 3.7E-06 1.5E-07 1.2E-08 3.5E-08 NC 6.0E-03 NC 5.8E-06SG-2S SG-2 5 2-Butanone (Methyl Ethyl K 0.0055 5.0E-06 2.8E-08 2.2E-09 6.3E-09 NC 5.0E+00 NC 1.3E-09SG-2S SG-2 5 2-Hexanone 0.039 4.4E-06 1.7E-07 1.4E-08 3.9E-08 NC 3.0E-02 NC 1.3E-06SG-2S SG-2 5 4-Ethyltoluene 0.07 4.2E-06 2.9E-07 2.4E-08 6.7E-08 NC 1.0E-01 NC 6.7E-07SG-2S SG-2 5 Acetone 0.15 7.7E-06 1.2E-06 9.4E-08 2.6E-07 NC 3.1E+01 NC 8.5E-09SG-2S SG-2 5 Benzene 0.006 5.4E-06 3.3E-08 2.7E-09 7.4E-09 2.9E-02 3.0E-02 7.7E-11 2.5E-07SG-2S SG-2 5 Carbon Disulfide 0.0295 6.4E-06 1.9E-07 1.5E-08 4.3E-08 NC 7.0E-01 NC 6.2E-08SG-2S SG-2 5 Cumene 0.019 4.0E-06 7.6E-08 6.2E-09 1.7E-08 NC 4.0E-01 NC 4.3E-08SG-2S SG-2 5 Ethanol 0.018 8.1E-06 1.5E-07 1.2E-08 3.3E-08 NC 1.1E+00 NC 3.2E-08SG-2S SG-2 5 Ethylbenzene 0.25 4.6E-06 1.2E-06 9.4E-08 2.6E-07 2.5E-03 1.0E+00 2.4E-10 2.6E-07SG-2S SG-2 5 Freon 11 0.0105 5.4E-06 5.6E-08 4.6E-09 1.3E-08 NC 7.0E-01 NC 1.8E-08SG-2S SG-2 5 Freon 12 0.0095 4.1E-06 3.9E-08 3.2E-09 8.9E-09 NC 2.0E-01 NC 4.4E-08SG-2S SG-2 5 Heptane 0.008 4.3E-06 3.5E-08 2.8E-09 7.9E-09 NC 7.0E-01 NC 1.1E-08SG-2S SG-2 5 Methyl tert-butyl ether 0.014 6.3E-06 8.8E-08 7.2E-09 2.0E-08 2.6E-04 3.0E+00 1.9E-12 6.7E-09SG-2S SG-2 5 Naphthalene 0.05 3.6E-06 1.8E-07 1.5E-08 4.2E-08 3.4E-02 3.0E-03 5.0E-10 1.4E-05SG-2S SG-2 5 Propylbenzene 0.0095 3.7E-06 3.5E-08 2.9E-09 8.0E-09 NC 1.0E+00 NC 8.0E-09SG-2S SG-2 5 Styrene 0.008 4.4E-06 3.5E-08 2.9E-09 8.0E-09 NC 9.0E-01 NC 8.9E-09SG-2S SG-2 5 Tetrachloroethene 0.013 4.4E-06 5.8E-08 4.7E-09 1.3E-08 5.9E-03 3.5E-02 2.8E-11 3.8E-07SG-2S SG-2 5 Toluene 3.4 5.4E-06 1.8E-05 1.5E-06 4.2E-06 NC 3.0E-01 NC 1.4E-05SG-2S SG-2 5 Total Xylenes 1.34 5.2E-06 7.0E-06 5.7E-07 1.6E-06 NC 1.0E-01 NC 1.6E-05SG-2S SG-2 5 Trichloroethene 0.01 4.9E-06 4.9E-08 4.0E-09 1.1E-08 2.0E-03 6.0E-01 7.9E-12 1.9E-08 8.5E-10 6.7E-05SG-2D SG-2 8 1,1-Difluoroethane 0.06 3.9E-06 2.4E-07 1.9E-08 5.4E-08 NC 4.0E+01 NC 1.3E-09SG-2D SG-2 8 1,2,4-Trimethylbenzene 0.16 2.3E-06 3.7E-07 3.0E-08 8.5E-08 NC 7.0E-03 NC 1.2E-05SG-2D SG-2 8 1,3,5-Trimethylbenzene 0.069 2.3E-06 1.6E-07 1.3E-08 3.7E-08 NC 6.0E-03 NC 6.1E-06SG-2D SG-2 8 2-Butanone (Methyl Ethyl K 0.016 3.1E-06 5.0E-08 4.1E-09 1.1E-08 NC 5.0E+00 NC 2.3E-09SG-2D SG-2 8 2-Hexanone 0.09 2.7E-06 2.4E-07 2.0E-08 5.6E-08 NC 3.0E-02 NC 1.9E-06SG-2D SG-2 8 4-Ethyltoluene 0.091 2.6E-06 2.4E-07 1.9E-08 5.4E-08 NC 1.0E-01 NC 5.4E-07SG-2D SG-2 8 Acetone 0.26 4.8E-06 1.3E-06 1.0E-07 2.9E-07 NC 3.1E+01 NC 9.2E-09SG-2D SG-2 8 Benzene 0.017 3.4E-06 5.8E-08 4.7E-09 1.3E-08 2.9E-02 3.0E-02 1.4E-10 4.4E-07SG-2D SG-2 8 Carbon Disulfide 0.0165 4.0E-06 6.6E-08 5.4E-09 1.5E-08 NC 7.0E-01 NC 2.2E-08SG-2D SG-2 8 Cumene 0.026 2.5E-06 6.5E-08 5.3E-09 1.5E-08 NC 4.0E-01 NC 3.7E-08SG-2D SG-2 8 Ethanol 0.0405 5.0E-06 2.0E-07 1.7E-08 4.7E-08 NC 1.1E+00 NC 4.4E-08SG-2D SG-2 8 Ethylbenzene 0.69 2.9E-06 2.0E-06 1.6E-07 4.6E-07 2.5E-03 1.0E+00 4.1E-10 4.6E-07SG-2D SG-2 8 Freon 11 0.03 3.4E-06 1.0E-07 8.2E-09 2.3E-08 NC 7.0E-01 NC 3.3E-08SG-2D SG-2 8 Freon 12 0.0265 2.6E-06 6.8E-08 5.5E-09 1.5E-08 NC 2.0E-01 NC 7.7E-08SG-2D SG-2 8 Heptane 0.022 2.7E-06 6.0E-08 4.9E-09 1.4E-08 NC 7.0E-01 NC 1.9E-08SG-2D SG-2 8 Methyl tert-butyl ether 0.019 3.9E-06 7.5E-08 6.1E-09 1.7E-08 2.6E-04 3.0E+00 1.6E-12 5.7E-09SG-2D SG-2 8 Naphthalene 0.11 2.3E-06 2.5E-07 2.0E-08 5.7E-08 3.4E-02 3.0E-03 6.9E-10 1.9E-05SG-2D SG-2 8 Propylbenzene 0.0265 2.3E-06 6.1E-08 5.0E-09 1.4E-08 NC 1.0E+00 NC 1.4E-08SG-2D SG-2 8 Styrene 0.023 2.7E-06 6.3E-08 5.1E-09 1.4E-08 NC 9.0E-01 NC 1.6E-08SG-2D SG-2 8 Tetrachloroethene 0.036 2.8E-06 1.0E-07 8.1E-09 2.3E-08 5.9E-03 3.5E-02 4.8E-11 6.5E-07SG-2D SG-2 8 Toluene 8.0 3.4E-06 2.7E-05 2.2E-06 6.1E-06 NC 3.0E-01 NC 2.0E-05SG-2D SG-2 8 Total Xylenes 3.49 3.3E-06 1.1E-05 9.3E-07 2.6E-06 NC 1.0E-01 NC 2.6E-05SG-2D SG-2 8 Trichloroethene 0.029 3.0E-06 8.8E-08 7.2E-09 2.0E-08 2.0E-03 6.0E-01 1.4E-11 3.4E-08 1.3E-09 8.8E-05
Lodi_HRA_Tables Page 2 of 7 IRIS ENVIRONMENTAL
Sample ID
Soil Gas Sample
Locationa
Sampling Depth
(feet bgs) Chemical
Soil Gas Concentration
(mg/m3)b
Transfer Factor
[(mg/m3)/(mg/m3)]c
Exposure Point
Concentration (EPC) in
Outdoor Air (mg/m3)d
Exposure Concentration (EC)
in Outdoor Air – Cancer Effects
(mg/m3)e
Exposure Concentration (EC)
in Outdoor Air– Noncancer
Effects (mg/m3)e
URF (mg/m3)-1
RfC (mg/m3)
Incremental Cancer
Risk from Vapors
in Outdoor Air(unitless)f
Noncancer Hazard
Quotient from Vapors
in Outdoor Air (unitless)f
Cumulative
Cancer Risk
Cumulative Noncancer
Hazard
TABLE 22OUTDOOR AIR INHALATION CANCER RISKS AND NONCANCER HAZARD INDICES FOR VOCS IN SOIL GAS:
CURRENT OFF-SITE COMMERCIAL SCENARIOFormer Lodi Manufactured Gas Plant
Lodi, California
SG-3S SG-3 5 1,1-Difluoroethane 0.0012 6.3E-06 7.6E-09 6.2E-10 1.7E-09 NC 4.0E+01 NC 4.3E-11SG-3S SG-3 5 1,2,4-Trimethylbenzene 0.18 3.7E-06 6.7E-07 5.5E-08 1.5E-07 NC 7.0E-03 NC 2.2E-05SG-3S SG-3 5 1,3,5-Trimethylbenzene 0.06 3.7E-06 2.2E-07 1.8E-08 5.1E-08 NC 6.0E-03 NC 8.5E-06SG-3S SG-3 5 2-Butanone (Methyl Ethyl K 0.0032 5.0E-06 1.6E-08 1.3E-09 3.7E-09 NC 5.0E+00 NC 7.3E-10SG-3S SG-3 5 2-Hexanone 0.0018 4.4E-06 7.8E-09 6.4E-10 1.8E-09 NC 3.0E-02 NC 6.0E-08SG-3S SG-3 5 4-Ethyltoluene 0.21 4.2E-06 8.8E-07 7.2E-08 2.0E-07 NC 1.0E-01 NC 2.0E-06SG-3S SG-3 5 Acetone 0.085 7.7E-06 6.5E-07 5.3E-08 1.5E-07 NC 3.1E+01 NC 4.8E-09SG-3S SG-3 5 Benzene 0.0014 5.4E-06 7.6E-09 6.2E-10 1.7E-09 2.9E-02 3.0E-02 1.8E-11 5.8E-08SG-3S SG-3 5 Carbon Disulfide 0.00135 6.4E-06 8.7E-09 7.1E-10 2.0E-09 NC 7.0E-01 NC 2.8E-09SG-3S SG-3 5 Cumene 0.011 4.0E-06 4.4E-08 3.6E-09 1.0E-08 NC 4.0E-01 NC 2.5E-08SG-3S SG-3 5 Ethanol 0.0008 8.1E-06 6.5E-09 5.3E-10 1.5E-09 NC 1.1E+00 NC 1.4E-09SG-3S SG-3 5 Ethylbenzene 0.03 4.6E-06 1.4E-07 1.1E-08 3.2E-08 2.5E-03 1.0E+00 2.8E-11 3.2E-08SG-3S SG-3 5 Freon 11 0.0013 5.4E-06 7.0E-09 5.7E-10 1.6E-09 NC 7.0E-01 NC 2.3E-09SG-3S SG-3 5 Freon 12 0.001 4.1E-06 4.1E-09 3.3E-10 9.4E-10 NC 2.0E-01 NC 4.7E-09SG-3S SG-3 5 Heptane 0.001 4.3E-06 4.3E-09 3.5E-10 9.9E-10 NC 7.0E-01 NC 1.4E-09SG-3S SG-3 5 Methyl tert-butyl ether 0.0034 6.3E-06 2.1E-08 1.8E-09 4.9E-09 2.6E-04 3.0E+00 4.6E-13 1.6E-09SG-3S SG-3 5 Naphthalene 0.023 3.6E-06 8.4E-08 6.8E-09 1.9E-08 3.4E-02 3.0E-03 2.3E-10 6.4E-06SG-3S SG-3 5 Propylbenzene 0.032 3.7E-06 1.2E-07 9.7E-09 2.7E-08 NC 1.0E+00 NC 2.7E-08SG-3S SG-3 5 Styrene 0.00037 4.4E-06 1.6E-09 1.3E-10 3.7E-10 NC 9.0E-01 NC 4.1E-10SG-3S SG-3 5 Tetrachloroethene 0.0035 4.4E-06 1.6E-08 1.3E-09 3.5E-09 5.9E-03 3.5E-02 7.5E-12 1.0E-07SG-3S SG-3 5 Toluene 0.12 5.4E-06 6.4E-07 5.2E-08 1.5E-07 NC 3.0E-01 NC 4.9E-07SG-3S SG-3 5 Total Xylenes 0.2 5.2E-06 1.0E-06 8.5E-08 2.4E-07 NC 1.0E-01 NC 2.4E-06SG-3S SG-3 5 Trichloroethene 0.0021 4.9E-06 1.0E-08 8.3E-10 2.3E-09 2.0E-03 6.0E-01 1.7E-12 3.9E-09 2.9E-10 4.2E-05SG-3D SG-3 8 1,1-Difluoroethane 0.0013 3.9E-06 5.1E-09 4.2E-10 1.2E-09 NC 4.0E+01 NC 2.9E-11SG-3D SG-3 8 1,2,4-Trimethylbenzene 0.24 2.3E-06 5.6E-07 4.6E-08 1.3E-07 NC 7.0E-03 NC 1.8E-05SG-3D SG-3 8 1,3,5-Trimethylbenzene 0.088 2.3E-06 2.0E-07 1.7E-08 4.7E-08 NC 6.0E-03 NC 7.8E-06SG-3D SG-3 8 2-Butanone (Methyl Ethyl K 0.0026 3.1E-06 8.1E-09 6.6E-10 1.9E-09 NC 5.0E+00 NC 3.7E-10SG-3D SG-3 8 2-Hexanone 0.0042 2.7E-06 1.1E-08 9.3E-10 2.6E-09 NC 3.0E-02 NC 8.7E-08SG-3D SG-3 8 4-Ethyltoluene 0.31 2.6E-06 8.1E-07 6.6E-08 1.9E-07 NC 1.0E-01 NC 1.9E-06SG-3D SG-3 8 Acetone 0.018 4.8E-06 8.7E-08 7.1E-09 2.0E-08 NC 3.1E+01 NC 6.4E-10SG-3D SG-3 8 Benzene 0.0013 3.4E-06 4.4E-09 3.6E-10 1.0E-09 2.9E-02 3.0E-02 1.0E-11 3.4E-08SG-3D SG-3 8 Carbon Disulfide 0.0015 4.0E-06 6.0E-09 4.9E-10 1.4E-09 NC 7.0E-01 NC 2.0E-09SG-3D SG-3 8 Cumene 0.01 2.5E-06 2.5E-08 2.0E-09 5.7E-09 NC 4.0E-01 NC 1.4E-08SG-3D SG-3 8 Ethanol 0.0009 5.0E-06 4.5E-09 3.7E-10 1.0E-09 NC 1.1E+00 NC 9.9E-10SG-3D SG-3 8 Ethylbenzene 0.023 2.9E-06 6.6E-08 5.4E-09 1.5E-08 2.5E-03 1.0E+00 1.4E-11 1.5E-08SG-3D SG-3 8 Freon 11 0.0014 3.4E-06 4.7E-09 3.8E-10 1.1E-09 NC 7.0E-01 NC 1.5E-09SG-3D SG-3 8 Freon 12 0.000485 2.6E-06 1.2E-09 1.0E-10 2.8E-10 NC 2.0E-01 NC 1.4E-09SG-3D SG-3 8 Heptane 0.0017 2.7E-06 4.6E-09 3.8E-10 1.1E-09 NC 7.0E-01 NC 1.5E-09SG-3D SG-3 8 Methyl tert-butyl ether 0.00071 3.9E-06 2.8E-09 2.3E-10 6.4E-10 2.6E-04 3.0E+00 5.9E-14 2.1E-10SG-3D SG-3 8 Naphthalene 0.015 2.3E-06 3.4E-08 2.8E-09 7.8E-09 3.4E-02 3.0E-03 9.5E-11 2.6E-06SG-3D SG-3 8 Propylbenzene 0.048 2.3E-06 1.1E-07 9.1E-09 2.5E-08 NC 1.0E+00 NC 2.5E-08SG-3D SG-3 8 Styrene 0.000415 2.7E-06 1.1E-09 9.3E-11 2.6E-10 NC 9.0E-01 NC 2.9E-10SG-3D SG-3 8 Tetrachloroethene 0.009 2.8E-06 2.5E-08 2.0E-09 5.7E-09 5.9E-03 3.5E-02 1.2E-11 1.6E-07SG-3D SG-3 8 Toluene 0.036 3.4E-06 1.2E-07 9.8E-09 2.8E-08 NC 3.0E-01 NC 9.2E-08SG-3D SG-3 8 Total Xylenes 0.134 3.3E-06 4.4E-07 3.6E-08 1.0E-07 NC 1.0E-01 NC 1.0E-06SG-3D SG-3 8 Trichloroethene 0.0005 3.0E-06 1.5E-09 1.2E-10 3.5E-10 2.0E-03 6.0E-01 2.5E-13 5.8E-10 1.3E-10 3.2E-05
Lodi_HRA_Tables Page 3 of 7 IRIS ENVIRONMENTAL
Sample ID
Soil Gas Sample
Locationa
Sampling Depth
(feet bgs) Chemical
Soil Gas Concentration
(mg/m3)b
Transfer Factor
[(mg/m3)/(mg/m3)]c
Exposure Point
Concentration (EPC) in
Outdoor Air (mg/m3)d
Exposure Concentration (EC)
in Outdoor Air – Cancer Effects
(mg/m3)e
Exposure Concentration (EC)
in Outdoor Air– Noncancer
Effects (mg/m3)e
URF (mg/m3)-1
RfC (mg/m3)
Incremental Cancer
Risk from Vapors
in Outdoor Air(unitless)f
Noncancer Hazard
Quotient from Vapors
in Outdoor Air (unitless)f
Cumulative
Cancer Risk
Cumulative Noncancer
Hazard
TABLE 22OUTDOOR AIR INHALATION CANCER RISKS AND NONCANCER HAZARD INDICES FOR VOCS IN SOIL GAS:
CURRENT OFF-SITE COMMERCIAL SCENARIOFormer Lodi Manufactured Gas Plant
Lodi, California
SG-4S SG-4 5 1,1-Difluoroethane 0.00205 6.3E-06 1.3E-08 1.1E-09 3.0E-09 NC 4.0E+01 NC 7.4E-11SG-4S SG-4 5 1,2,4-Trimethylbenzene 0.059 3.7E-06 2.2E-07 1.8E-08 5.0E-08 NC 7.0E-03 NC 7.2E-06SG-4S SG-4 5 1,3,5-Trimethylbenzene 0.029 3.7E-06 1.1E-07 8.8E-09 2.5E-08 NC 6.0E-03 NC 4.1E-06SG-4S SG-4 5 2-Butanone (Methyl Ethyl K 0.004 5.0E-06 2.0E-08 1.6E-09 4.6E-09 NC 5.0E+00 NC 9.2E-10SG-4S SG-4 5 2-Hexanone 0.0031 4.4E-06 1.3E-08 1.1E-09 3.1E-09 NC 3.0E-02 NC 1.0E-07SG-4S SG-4 5 4-Ethyltoluene 0.083 4.2E-06 3.5E-07 2.8E-08 7.9E-08 NC 1.0E-01 NC 7.9E-07SG-4S SG-4 5 Acetone 0.082 7.7E-06 6.3E-07 5.1E-08 1.4E-07 NC 3.1E+01 NC 4.6E-09SG-4S SG-4 5 Benzene 0.0046 5.4E-06 2.5E-08 2.0E-09 5.7E-09 2.9E-02 3.0E-02 5.9E-11 1.9E-07SG-4S SG-4 5 Carbon Disulfide 0.034 6.4E-06 2.2E-07 1.8E-08 5.0E-08 NC 7.0E-01 NC 7.1E-08SG-4S SG-4 5 Cumene 0.022 4.0E-06 8.8E-08 7.2E-09 2.0E-08 NC 4.0E-01 NC 5.0E-08SG-4S SG-4 5 Ethanol 0.00145 8.1E-06 1.2E-08 9.5E-10 2.7E-09 NC 1.1E+00 NC 2.5E-09SG-4S SG-4 5 Ethylbenzene 0.04 4.6E-06 1.8E-07 1.5E-08 4.2E-08 2.5E-03 1.0E+00 3.8E-11 4.2E-08SG-4S SG-4 5 Freon 11 0.0018 5.4E-06 9.6E-09 7.9E-10 2.2E-09 NC 7.0E-01 NC 3.1E-09SG-4S SG-4 5 Freon 12 0.00075 4.1E-06 3.1E-09 2.5E-10 7.0E-10 NC 2.0E-01 NC 3.5E-09SG-4S SG-4 5 Heptane 0.0006 4.3E-06 2.6E-09 2.1E-10 5.9E-10 NC 7.0E-01 NC 8.5E-10SG-4S SG-4 5 Methyl tert-butyl ether 0.0011 6.3E-06 6.9E-09 5.7E-10 1.6E-09 2.6E-04 3.0E+00 1.5E-13 5.3E-10SG-4S SG-4 5 Naphthalene 0.004 3.6E-06 1.5E-08 1.2E-09 3.3E-09 3.4E-02 3.0E-03 4.0E-11 1.1E-06SG-4S SG-4 5 Propylbenzene 0.012 3.7E-06 4.4E-08 3.6E-09 1.0E-08 NC 1.0E+00 NC 1.0E-08SG-4S SG-4 5 Styrene 0.00065 4.4E-06 2.8E-09 2.3E-10 6.5E-10 NC 9.0E-01 NC 7.2E-10SG-4S SG-4 5 Tetrachloroethene 0.0026 4.4E-06 1.2E-08 9.4E-10 2.6E-09 5.9E-03 3.5E-02 5.5E-12 7.5E-08SG-4S SG-4 5 Toluene 0.0069 5.4E-06 3.7E-08 3.0E-09 8.4E-09 NC 3.0E-01 NC 2.8E-08SG-4S SG-4 5 Total Xylenes 0.252 5.2E-06 1.3E-06 1.1E-07 3.0E-07 NC 1.0E-01 NC 3.0E-06SG-4S SG-4 5 Trichloroethene 0.0062 4.9E-06 3.0E-08 2.5E-09 6.9E-09 2.0E-03 6.0E-01 4.9E-12 1.1E-08 1.5E-10 1.7E-05SG-4D SG-4 8 1,1-Difluoroethane 0.011 3.9E-06 4.3E-08 3.5E-09 9.9E-09 NC 4.0E+01 NC 2.5E-10SG-4D SG-4 8 1,2,4-Trimethylbenzene 0.045 2.3E-06 1.1E-07 8.6E-09 2.4E-08 NC 7.0E-03 NC 3.4E-06SG-4D SG-4 8 1,3,5-Trimethylbenzene 0.026 2.3E-06 6.0E-08 4.9E-09 1.4E-08 NC 6.0E-03 NC 2.3E-06SG-4D SG-4 8 2-Butanone (Methyl Ethyl K 0.0078 3.1E-06 2.4E-08 2.0E-09 5.6E-09 NC 5.0E+00 NC 1.1E-09SG-4D SG-4 8 2-Hexanone 0.017 2.7E-06 4.6E-08 3.8E-09 1.1E-08 NC 3.0E-02 NC 3.5E-07SG-4D SG-4 8 4-Ethyltoluene 0.072 2.6E-06 1.9E-07 1.5E-08 4.3E-08 NC 1.0E-01 NC 4.3E-07SG-4D SG-4 8 Acetone 0.21 4.8E-06 1.0E-06 8.2E-08 2.3E-07 NC 3.1E+01 NC 7.4E-09SG-4D SG-4 8 Benzene 0.0075 3.4E-06 2.5E-08 2.1E-09 5.8E-09 2.9E-02 3.0E-02 6.0E-11 1.9E-07SG-4D SG-4 8 Carbon Disulfide 0.013 4.0E-06 5.2E-08 4.2E-09 1.2E-08 NC 7.0E-01 NC 1.7E-08SG-4D SG-4 8 Cumene 0.027 2.5E-06 6.8E-08 5.5E-09 1.5E-08 NC 4.0E-01 NC 3.9E-08SG-4D SG-4 8 Ethanol 0.008 5.0E-06 4.0E-08 3.3E-09 9.2E-09 NC 1.1E+00 NC 8.8E-09SG-4D SG-4 8 Ethylbenzene 0.042 2.9E-06 1.2E-07 9.9E-09 2.8E-08 2.5E-03 1.0E+00 2.5E-11 2.8E-08SG-4D SG-4 8 Freon 11 0.0047 3.4E-06 1.6E-08 1.3E-09 3.6E-09 NC 7.0E-01 NC 5.1E-09SG-4D SG-4 8 Freon 12 0.0041 2.6E-06 1.0E-08 8.6E-10 2.4E-09 NC 2.0E-01 NC 1.2E-08SG-4D SG-4 8 Heptane 0.0034 2.7E-06 9.2E-09 7.5E-10 2.1E-09 NC 7.0E-01 NC 3.0E-09SG-4D SG-4 8 Methyl tert-butyl ether 0.006 3.9E-06 2.4E-08 1.9E-09 5.4E-09 2.6E-04 3.0E+00 5.0E-13 1.8E-09SG-4D SG-4 8 Naphthalene 0.022 2.3E-06 5.0E-08 4.1E-09 1.1E-08 3.4E-02 3.0E-03 1.4E-10 3.8E-06SG-4D SG-4 8 Propylbenzene 0.01 2.3E-06 2.3E-08 1.9E-09 5.3E-09 NC 1.0E+00 NC 5.3E-09SG-4D SG-4 8 Styrene 0.00355 2.7E-06 9.7E-09 7.9E-10 2.2E-09 NC 9.0E-01 NC 2.5E-09SG-4D SG-4 8 Tetrachloroethene 0.0055 2.8E-06 1.5E-08 1.2E-09 3.5E-09 5.9E-03 3.5E-02 7.3E-12 9.9E-08SG-4D SG-4 8 Toluene 0.0099 3.4E-06 3.3E-08 2.7E-09 7.6E-09 NC 3.0E-01 NC 2.5E-08SG-4D SG-4 8 Total Xylenes 0.25 3.3E-06 8.2E-07 6.7E-08 1.9E-07 NC 1.0E-01 NC 1.9E-06SG-4D SG-4 8 Trichloroethene 0.0045 3.0E-06 1.4E-08 1.1E-09 3.1E-09 2.0E-03 6.0E-01 2.2E-12 5.2E-09 2.3E-10 1.3E-05
Lodi_HRA_Tables Page 4 of 7 IRIS ENVIRONMENTAL
Sample ID
Soil Gas Sample
Locationa
Sampling Depth
(feet bgs) Chemical
Soil Gas Concentration
(mg/m3)b
Transfer Factor
[(mg/m3)/(mg/m3)]c
Exposure Point
Concentration (EPC) in
Outdoor Air (mg/m3)d
Exposure Concentration (EC)
in Outdoor Air – Cancer Effects
(mg/m3)e
Exposure Concentration (EC)
in Outdoor Air– Noncancer
Effects (mg/m3)e
URF (mg/m3)-1
RfC (mg/m3)
Incremental Cancer
Risk from Vapors
in Outdoor Air(unitless)f
Noncancer Hazard
Quotient from Vapors
in Outdoor Air (unitless)f
Cumulative
Cancer Risk
Cumulative Noncancer
Hazard
TABLE 22OUTDOOR AIR INHALATION CANCER RISKS AND NONCANCER HAZARD INDICES FOR VOCS IN SOIL GAS:
CURRENT OFF-SITE COMMERCIAL SCENARIOFormer Lodi Manufactured Gas Plant
Lodi, California
SG-5S SG-5 5 1,1-Difluoroethane 0.0055 6.3E-06 3.5E-08 2.8E-09 7.9E-09 NC 4.0E+01 NC 2.0E-10SG-5S SG-5 5 1,2,4-Trimethylbenzene 0.066 3.7E-06 2.5E-07 2.0E-08 5.6E-08 NC 7.0E-03 NC 8.0E-06SG-5S SG-5 5 1,3,5-Trimethylbenzene 0.026 3.7E-06 9.6E-08 7.9E-09 2.2E-08 NC 6.0E-03 NC 3.7E-06SG-5S SG-5 5 2-Butanone (Methyl Ethyl K 0.0044 5.0E-06 2.2E-08 1.8E-09 5.0E-09 NC 5.0E+00 NC 1.0E-09SG-5S SG-5 5 2-Hexanone 0.0085 4.4E-06 3.7E-08 3.0E-09 8.4E-09 NC 3.0E-02 NC 2.8E-07SG-5S SG-5 5 4-Ethyltoluene 0.066 4.2E-06 2.8E-07 2.3E-08 6.3E-08 NC 1.0E-01 NC 6.3E-07SG-5S SG-5 5 Acetone 0.18 7.7E-06 1.4E-06 1.1E-07 3.2E-07 NC 3.1E+01 NC 1.0E-08SG-5S SG-5 5 Benzene 0.00135 5.4E-06 7.3E-09 6.0E-10 1.7E-09 2.9E-02 3.0E-02 1.7E-11 5.6E-08SG-5S SG-5 5 Carbon Disulfide 0.0065 6.4E-06 4.2E-08 3.4E-09 9.5E-09 NC 7.0E-01 NC 1.4E-08SG-5S SG-5 5 Cumene 0.0056 4.0E-06 2.2E-08 1.8E-09 5.1E-09 NC 4.0E-01 NC 1.3E-08SG-5S SG-5 5 Ethanol 0.00395 8.1E-06 3.2E-08 2.6E-09 7.3E-09 NC 1.1E+00 NC 6.9E-09SG-5S SG-5 5 Ethylbenzene 0.0037 4.6E-06 1.7E-08 1.4E-09 3.9E-09 2.5E-03 1.0E+00 3.5E-12 3.9E-09SG-5S SG-5 5 Freon 11 0.00235 5.4E-06 1.3E-08 1.0E-09 2.9E-09 NC 7.0E-01 NC 4.1E-09SG-5S SG-5 5 Freon 12 0.0021 4.1E-06 8.6E-09 7.0E-10 2.0E-09 NC 2.0E-01 NC 9.8E-09SG-5S SG-5 5 Heptane 0.0017 4.3E-06 7.4E-09 6.0E-10 1.7E-09 NC 7.0E-01 NC 2.4E-09SG-5S SG-5 5 Methyl tert-butyl ether 0.0015 6.3E-06 9.5E-09 7.7E-10 2.2E-09 2.6E-04 3.0E+00 2.0E-13 7.2E-10SG-5S SG-5 5 Naphthalene 0.011 3.6E-06 4.0E-08 3.3E-09 9.1E-09 3.4E-02 3.0E-03 1.1E-10 3.0E-06SG-5S SG-5 5 Propylbenzene 0.0096 3.7E-06 3.6E-08 2.9E-09 8.1E-09 NC 1.0E+00 NC 8.1E-09SG-5S SG-5 5 Styrene 0.0018 4.4E-06 7.9E-09 6.4E-10 1.8E-09 NC 9.0E-01 NC 2.0E-09SG-5S SG-5 5 Tetrachloroethene 0.00285 4.4E-06 1.3E-08 1.0E-09 2.9E-09 5.9E-03 3.5E-02 6.1E-12 8.2E-08SG-5S SG-5 5 Toluene 0.036 5.4E-06 1.9E-07 1.6E-08 4.4E-08 NC 3.0E-01 NC 1.5E-07SG-5S SG-5 5 Total Xylenes 0.0263 5.2E-06 1.4E-07 1.1E-08 3.1E-08 NC 1.0E-01 NC 3.1E-07SG-5S SG-5 5 Trichloroethene 0.00225 4.9E-06 1.1E-08 8.9E-10 2.5E-09 2.0E-03 6.0E-01 1.8E-12 4.2E-09 1.4E-10 1.6E-05SG-5D SG-5 8 1,1-Difluoroethane 0.0051 3.9E-06 2.0E-08 1.6E-09 4.6E-09 NC 4.0E+01 NC 1.1E-10SG-5D SG-5 8 1,2,4-Trimethylbenzene 0.12 2.3E-06 2.8E-07 2.3E-08 6.4E-08 NC 7.0E-03 NC 9.1E-06SG-5D SG-5 8 1,3,5-Trimethylbenzene 0.05 2.3E-06 1.2E-07 9.5E-09 2.6E-08 NC 6.0E-03 NC 4.4E-06SG-5D SG-5 8 2-Butanone (Methyl Ethyl K 0.0081 3.1E-06 2.5E-08 2.1E-09 5.8E-09 NC 5.0E+00 NC 1.2E-09SG-5D SG-5 8 2-Hexanone 0.009 2.7E-06 2.4E-08 2.0E-09 5.6E-09 NC 3.0E-02 NC 1.9E-07SG-5D SG-5 8 4-Ethyltoluene 0.11 2.6E-06 2.9E-07 2.4E-08 6.6E-08 NC 1.0E-01 NC 6.6E-07SG-5D SG-5 8 Acetone 0.25 4.8E-06 1.2E-06 9.8E-08 2.7E-07 NC 3.1E+01 NC 8.9E-09SG-5D SG-5 8 Benzene 0.0014 3.4E-06 4.7E-09 3.9E-10 1.1E-09 2.9E-02 3.0E-02 1.1E-11 3.6E-08SG-5D SG-5 8 Carbon Disulfide 0.007 4.0E-06 2.8E-08 2.3E-09 6.4E-09 NC 7.0E-01 NC 9.1E-09SG-5D SG-5 8 Cumene 0.0022 2.5E-06 5.5E-09 4.5E-10 1.3E-09 NC 4.0E-01 NC 3.1E-09SG-5D SG-5 8 Ethanol 0.016 5.0E-06 8.1E-08 6.6E-09 1.8E-08 NC 1.1E+00 NC 1.8E-08SG-5D SG-5 8 Ethylbenzene 0.00195 2.9E-06 5.6E-09 4.6E-10 1.3E-09 2.5E-03 1.0E+00 1.1E-12 1.3E-09SG-5D SG-5 8 Freon 11 0.0025 3.4E-06 8.4E-09 6.8E-10 1.9E-09 NC 7.0E-01 NC 2.7E-09SG-5D SG-5 8 Freon 12 0.0022 2.6E-06 5.6E-09 4.6E-10 1.3E-09 NC 2.0E-01 NC 6.4E-09SG-5D SG-5 8 Heptane 0.00185 2.7E-06 5.0E-09 4.1E-10 1.1E-09 NC 7.0E-01 NC 1.6E-09SG-5D SG-5 8 Methyl tert-butyl ether 0.0016 3.9E-06 6.3E-09 5.1E-10 1.4E-09 2.6E-04 3.0E+00 1.3E-13 4.8E-10SG-5D SG-5 8 Naphthalene 0.0115 2.3E-06 2.6E-08 2.1E-09 6.0E-09 3.4E-02 3.0E-03 7.2E-11 2.0E-06SG-5D SG-5 8 Propylbenzene 0.016 2.3E-06 3.7E-08 3.0E-09 8.5E-09 NC 1.0E+00 NC 8.5E-09SG-5D SG-5 8 Styrene 0.0019 2.7E-06 5.2E-09 4.2E-10 1.2E-09 NC 9.0E-01 NC 1.3E-09SG-5D SG-5 8 Tetrachloroethene 0.00305 2.8E-06 8.5E-09 6.9E-10 1.9E-09 5.9E-03 3.5E-02 4.1E-12 5.5E-08SG-5D SG-5 8 Toluene 0.051 3.4E-06 1.7E-07 1.4E-08 3.9E-08 NC 3.0E-01 NC 1.3E-07SG-5D SG-5 8 Total Xylenes 0.0198 3.3E-06 6.5E-08 5.3E-09 1.5E-08 NC 1.0E-01 NC 1.5E-07SG-5D SG-5 8 Trichloroethene 0.0024 3.0E-06 7.3E-09 6.0E-10 1.7E-09 2.0E-03 6.0E-01 1.2E-12 2.8E-09 9.0E-11 1.7E-05
Lodi_HRA_Tables Page 5 of 7 IRIS ENVIRONMENTAL
Sample ID
Soil Gas Sample
Locationa
Sampling Depth
(feet bgs) Chemical
Soil Gas Concentration
(mg/m3)b
Transfer Factor
[(mg/m3)/(mg/m3)]c
Exposure Point
Concentration (EPC) in
Outdoor Air (mg/m3)d
Exposure Concentration (EC)
in Outdoor Air – Cancer Effects
(mg/m3)e
Exposure Concentration (EC)
in Outdoor Air– Noncancer
Effects (mg/m3)e
URF (mg/m3)-1
RfC (mg/m3)
Incremental Cancer
Risk from Vapors
in Outdoor Air(unitless)f
Noncancer Hazard
Quotient from Vapors
in Outdoor Air (unitless)f
Cumulative
Cancer Risk
Cumulative Noncancer
Hazard
TABLE 22OUTDOOR AIR INHALATION CANCER RISKS AND NONCANCER HAZARD INDICES FOR VOCS IN SOIL GAS:
CURRENT OFF-SITE COMMERCIAL SCENARIOFormer Lodi Manufactured Gas Plant
Lodi, California
SG-6S SG-6 5 1,1-Difluoroethane 0.006 6.3E-06 3.8E-08 3.1E-09 8.6E-09 NC 4.0E+01 NC 2.2E-10SG-6S SG-6 5 1,2,4-Trimethylbenzene 0.011 3.7E-06 4.1E-08 3.3E-09 9.4E-09 NC 7.0E-03 NC 1.3E-06SG-6S SG-6 5 1,3,5-Trimethylbenzene 0.0021 3.7E-06 7.8E-09 6.4E-10 1.8E-09 NC 6.0E-03 NC 3.0E-07SG-6S SG-6 5 2-Butanone (Methyl Ethyl K 0.004 5.0E-06 2.0E-08 1.6E-09 4.6E-09 NC 5.0E+00 NC 9.2E-10SG-6S SG-6 5 2-Hexanone 0.009 4.4E-06 3.9E-08 3.2E-09 8.9E-09 NC 3.0E-02 NC 3.0E-07SG-6S SG-6 5 4-Ethyltoluene 0.008 4.2E-06 3.4E-08 2.7E-09 7.7E-09 NC 1.0E-01 NC 7.7E-08SG-6S SG-6 5 Acetone 0.03 7.7E-06 2.3E-07 1.9E-08 5.3E-08 NC 3.1E+01 NC 1.7E-09SG-6S SG-6 5 Benzene 0.00135 5.4E-06 7.3E-09 6.0E-10 1.7E-09 2.9E-02 3.0E-02 1.7E-11 5.6E-08SG-6S SG-6 5 Carbon Disulfide 0.0065 6.4E-06 4.2E-08 3.4E-09 9.5E-09 NC 7.0E-01 NC 1.4E-08SG-6S SG-6 5 Cumene 0.0021 4.0E-06 8.4E-09 6.9E-10 1.9E-09 NC 4.0E-01 NC 4.8E-09SG-6S SG-6 5 Ethanol 0.004 8.1E-06 3.2E-08 2.6E-09 7.4E-09 NC 1.1E+00 NC 7.0E-09SG-6S SG-6 5 Ethylbenzene 0.037 4.6E-06 1.7E-07 1.4E-08 3.9E-08 2.5E-03 1.0E+00 3.5E-11 3.9E-08SG-6S SG-6 5 Freon 11 0.0024 5.4E-06 1.3E-08 1.0E-09 2.9E-09 NC 7.0E-01 NC 4.2E-09SG-6S SG-6 5 Freon 12 0.0021 4.1E-06 8.6E-09 7.0E-10 2.0E-09 NC 2.0E-01 NC 9.8E-09SG-6S SG-6 5 Heptane 0.0076 4.3E-06 3.3E-08 2.7E-09 7.5E-09 NC 7.0E-01 NC 1.1E-08SG-6S SG-6 5 Methyl tert-butyl ether 0.00155 6.3E-06 9.8E-09 8.0E-10 2.2E-09 2.6E-04 3.0E+00 2.1E-13 7.4E-10SG-6S SG-6 5 Naphthalene 0.011 3.6E-06 4.0E-08 3.3E-09 9.1E-09 3.4E-02 3.0E-03 1.1E-10 3.0E-06SG-6S SG-6 5 Propylbenzene 0.0021 3.7E-06 7.8E-09 6.3E-10 1.8E-09 NC 1.0E+00 NC 1.8E-09SG-6S SG-6 5 Styrene 0.0018 4.4E-06 7.9E-09 6.4E-10 1.8E-09 NC 9.0E-01 NC 2.0E-09SG-6S SG-6 5 Tetrachloroethene 0.0029 4.4E-06 1.3E-08 1.0E-09 2.9E-09 5.9E-03 3.5E-02 6.2E-12 8.4E-08SG-6S SG-6 5 Toluene 0.57 5.4E-06 3.1E-06 2.5E-07 7.0E-07 NC 3.0E-01 NC 2.3E-06SG-6S SG-6 5 Total Xylenes 0.182 5.2E-06 9.5E-07 7.8E-08 2.2E-07 NC 1.0E-01 NC 2.2E-06SG-6S SG-6 5 Trichloroethene 0.0023 4.9E-06 1.1E-08 9.1E-10 2.6E-09 2.0E-03 6.0E-01 1.8E-12 4.3E-09 1.7E-10 9.8E-06SG-6D SG-6 8 1,1-Difluoroethane 0.0115 3.9E-06 4.5E-08 3.7E-09 1.0E-08 NC 4.0E+01 NC 2.6E-10SG-6D SG-6 8 1,2,4-Trimethylbenzene 0.016 2.3E-06 3.7E-08 3.0E-09 8.5E-09 NC 7.0E-03 NC 1.2E-06SG-6D SG-6 8 1,3,5-Trimethylbenzene 0.0041 2.3E-06 9.5E-09 7.8E-10 2.2E-09 NC 6.0E-03 NC 3.6E-07SG-6D SG-6 8 2-Butanone (Methyl Ethyl K 0.0069 3.1E-06 2.2E-08 1.8E-09 4.9E-09 NC 5.0E+00 NC 9.9E-10SG-6D SG-6 8 2-Hexanone 0.017 2.7E-06 4.6E-08 3.8E-09 1.1E-08 NC 3.0E-02 NC 3.5E-07SG-6D SG-6 8 4-Ethyltoluene 0.012 2.6E-06 3.1E-08 2.6E-09 7.2E-09 NC 1.0E-01 NC 7.2E-08SG-6D SG-6 8 Acetone 0.06 4.8E-06 2.9E-07 2.4E-08 6.6E-08 NC 3.1E+01 NC 2.1E-09SG-6D SG-6 8 Benzene 0.0027 3.4E-06 9.2E-09 7.5E-10 2.1E-09 2.9E-02 3.0E-02 2.2E-11 7.0E-08SG-6D SG-6 8 Carbon Disulfide 0.013 4.0E-06 5.2E-08 4.2E-09 1.2E-08 NC 7.0E-01 NC 1.7E-08SG-6D SG-6 8 Cumene 0.0041 2.5E-06 1.0E-08 8.4E-10 2.3E-09 NC 4.0E-01 NC 5.9E-09SG-6D SG-6 8 Ethanol 0.008 5.0E-06 4.0E-08 3.3E-09 9.2E-09 NC 1.1E+00 NC 8.8E-09SG-6D SG-6 8 Ethylbenzene 0.069 2.9E-06 2.0E-07 1.6E-08 4.6E-08 2.5E-03 1.0E+00 4.1E-11 4.6E-08SG-6D SG-6 8 Freon 11 0.0047 3.4E-06 1.6E-08 1.3E-09 3.6E-09 NC 7.0E-01 NC 5.1E-09SG-6D SG-6 8 Freon 12 0.00415 2.6E-06 1.1E-08 8.7E-10 2.4E-09 NC 2.0E-01 NC 1.2E-08SG-6D SG-6 8 Heptane 0.013 2.7E-06 3.5E-08 2.9E-09 8.0E-09 NC 7.0E-01 NC 1.1E-08SG-6D SG-6 8 Methyl tert-butyl ether 0.003 3.9E-06 1.2E-08 9.7E-10 2.7E-09 2.6E-04 3.0E+00 2.5E-13 9.0E-10SG-6D SG-6 8 Naphthalene 0.022 2.3E-06 5.0E-08 4.1E-09 1.1E-08 3.4E-02 3.0E-03 1.4E-10 3.8E-06SG-6D SG-6 8 Propylbenzene 0.0041 2.3E-06 9.5E-09 7.7E-10 2.2E-09 NC 1.0E+00 NC 2.2E-09SG-6D SG-6 8 Styrene 0.0036 2.7E-06 9.8E-09 8.0E-10 2.2E-09 NC 9.0E-01 NC 2.5E-09SG-6D SG-6 8 Tetrachloroethene 0.0055 2.8E-06 1.5E-08 1.2E-09 3.5E-09 5.9E-03 3.5E-02 7.3E-12 9.9E-08SG-6D SG-6 8 Toluene 1.0 3.4E-06 3.4E-06 2.7E-07 7.6E-07 NC 3.0E-01 NC 2.5E-06SG-6D SG-6 8 Total Xylenes 0.34 3.3E-06 1.1E-06 9.1E-08 2.5E-07 NC 1.0E-01 NC 2.5E-06SG-6D SG-6 8 Trichloroethene 0.0045 3.0E-06 1.4E-08 1.1E-09 3.1E-09 2.0E-03 6.0E-01 2.2E-12 5.2E-09 2.2E-11 2.1E-06
Lodi_HRA_Tables Page 6 of 7 IRIS ENVIRONMENTAL
Sample ID
Soil Gas Sample
Locationa
Sampling Depth
(feet bgs) Chemical
Soil Gas Concentration
(mg/m3)b
Transfer Factor
[(mg/m3)/(mg/m3)]c
Exposure Point
Concentration (EPC) in
Outdoor Air (mg/m3)d
Exposure Concentration (EC)
in Outdoor Air – Cancer Effects
(mg/m3)e
Exposure Concentration (EC)
in Outdoor Air– Noncancer
Effects (mg/m3)e
URF (mg/m3)-1
RfC (mg/m3)
Incremental Cancer
Risk from Vapors
in Outdoor Air(unitless)f
Noncancer Hazard
Quotient from Vapors
in Outdoor Air (unitless)f
Cumulative
Cancer Risk
Cumulative Noncancer
Hazard
TABLE 22OUTDOOR AIR INHALATION CANCER RISKS AND NONCANCER HAZARD INDICES FOR VOCS IN SOIL GAS:
CURRENT OFF-SITE COMMERCIAL SCENARIOFormer Lodi Manufactured Gas Plant
Lodi, California
Site-wide Average 3.7E-10 3.4E-05
Notes:
bgs = below ground surface
NC = Not considered to be a carcinogen.
mg/m3 = micrograms per cubic meter
f Incremental cancer risks and noncancer hazard quotients were calculated using equations presented in Table 6 and exposure parameters presented in Table 4.
a All locations and depths are included.b Measured chemical concentration in soil gas. Detected results are presented in bold. Non-detect results are represented by one-half the laboratory reporting limit; non-detect results are included if the chemical was detected in at least one site soil gas sample. In the case of non-detect results in both duplicate and primary samples, one-half of the lower of the two detection limits was evaluated.c The transfer factor represents the relationship between the chemical concentration in soil gas and the chemical concentration in outdoor air (resulting from volatilization from soil gas into outdoor air). The methodology used in the calculation of transfer factors is presented in Attachment D.d The exposure point concentration (EPC) in outdoor air is the actual concentration the receptor is exposed to while in outdoor air. e The exposure concentrations (ECs) are analagous to chronic daily intakes (CDIs).
Lodi_HRA_Tables Page 7 of 7 IRIS ENVIRONMENTAL
Sample ID
Soil Gas Sample
Locationa
Sampling Depth
(feet bgs) Chemical
Soil Gas Concentration
(mg/m3)b
Attenuation Factor
[(mg/m3)/(mg/m3)]c
Exposure Point
Concentration (EPC) in Indoor
Air (mg/m3)d
Exposure Concentration (EC)
in Indoor Air – Cancer Effects
(mg/m3)e
Exposure Concentration (EC)
in Indoor Air– Noncancer
Effects (mg/m3)e
URF (mg/m3)-1
RfC (mg/m3)
Incremental Cancer
Risk from Vapor
Intrusion (unitless)f
Noncancer Hazard
Quotient from Vapor
Intrusion (unitless)f
Cumulative Cancer
Risk
Cumulative Noncancer
Hazard SG-1S SG-1 5 1,1-Difluoroethane 0.0019 1.0E-03 1.9E-06 7.9E-07 1.8E-06 NC 4.0E+01 NC 4.6E-08SG-1S SG-1 5 1,2,4-Trimethylbenzene 0.14 7.2E-04 1.0E-04 4.1E-05 9.7E-05 NC 7.0E-03 NC 1.4E-02SG-1S SG-1 5 1,3,5-Trimethylbenzene 0.066 7.2E-04 4.7E-05 1.9E-05 4.5E-05 NC 6.0E-03 NC 7.6E-03SG-1S SG-1 5 2-Butanone (Methyl Ethyl K 0.0053 8.8E-04 4.7E-06 1.9E-06 4.5E-06 NC 5.0E+00 NC 8.9E-07SG-1S SG-1 5 2-Hexanone 0.0029 8.0E-04 2.3E-06 9.5E-07 2.2E-06 NC 3.0E-02 NC 7.4E-05SG-1S SG-1 5 4-Ethyltoluene 0.16 7.8E-04 1.2E-04 5.1E-05 1.2E-04 NC 1.0E-01 NC 1.2E-03SG-1S SG-1 5 Acetone 0.068 1.1E-03 7.7E-05 3.2E-05 7.4E-05 NC 3.1E+01 NC 2.4E-06SG-1S SG-1 5 Benzene 0.0017 9.2E-04 1.6E-06 6.4E-07 1.5E-06 2.9E-02 3.0E-02 1.9E-08 5.0E-05SG-1S SG-1 5 Carbon Disulfide 0.0022 1.0E-03 2.2E-06 9.2E-07 2.2E-06 NC 7.0E-01 NC 3.1E-06SG-1S SG-1 5 Cumene 0.0058 7.6E-04 4.4E-06 1.8E-06 4.2E-06 NC 4.0E-01 NC 1.1E-05SG-1S SG-1 5 Ethanol 0.0032 1.2E-03 3.7E-06 1.5E-06 3.6E-06 NC 1.1E+00 NC 3.4E-06SG-1S SG-1 5 Ethylbenzene 0.052 8.3E-04 4.3E-05 1.8E-05 4.2E-05 2.5E-03 1.0E+00 4.4E-08 4.2E-05SG-1S SG-1 5 Freon 11 0.0008 9.2E-04 7.3E-07 3.0E-07 7.0E-07 NC 7.0E-01 NC 1.0E-06SG-1S SG-1 5 Freon 12 0.0014 7.7E-04 1.1E-06 4.4E-07 1.0E-06 NC 2.0E-01 NC 5.2E-06SG-1S SG-1 5 Heptane 0.0006 8.0E-04 4.8E-07 2.0E-07 4.6E-07 NC 7.0E-01 NC 6.6E-07SG-1S SG-1 5 Methyl tert-butyl ether 0.001 1.0E-03 1.0E-06 4.2E-07 9.7E-07 2.6E-04 3.0E+00 1.1E-10 3.2E-07SG-1S SG-1 5 Naphthalene 0.00375 7.1E-04 2.6E-06 1.1E-06 2.5E-06 3.4E-02 3.0E-03 3.7E-08 8.5E-04SG-1S SG-1 5 Propylbenzene 0.021 7.2E-04 1.50E-05 6.2E-06 1.4E-05 NC 1.0E+00 NC 1.4E-05SG-1S SG-1 5 Styrene 0.0006 8.0E-04 4.8E-07 2.0E-07 4.6E-07 NC 9.0E-01 NC 5.1E-07SG-1S SG-1 5 Tetrachloroethene 0.0021 8.1E-04 1.7E-06 7.0E-07 1.6E-06 5.9E-03 3.5E-02 4.1E-09 4.7E-05SG-1S SG-1 5 Toluene 0.011 9.2E-04 1.0E-05 4.1E-06 9.7E-06 NC 3.0E-01 NC 3.2E-05SG-1S SG-1 5 Total Xylenes 0.311 9.0E-04 2.8E-04 1.2E-04 2.7E-04 NC 1.0E-01 NC 2.7E-03SG-1S SG-1 5 Trichloroethene 0.00075 8.6E-04 6.5E-07 2.7E-07 6.2E-07 2.0E-03 6.0E-01 5.3E-10 1.0E-06 1.0E-07 2.6E-02SG-1D SG-1 8 1,1-Difluoroethane 0.0029 7.3E-04 2.1E-06 8.7E-07 2.0E-06 NC 4.0E+01 NC 5.0E-08SG-1D SG-1 8 1,2,4-Trimethylbenzene 0.21 4.9E-04 1.0E-04 4.2E-05 9.8E-05 NC 7.0E-03 NC 1.4E-02SG-1D SG-1 8 1,3,5-Trimethylbenzene 0.091 4.9E-04 4.4E-05 1.8E-05 4.2E-05 NC 6.0E-03 NC 7.1E-03SG-1D SG-1 8 2-Butanone (Methyl Ethyl K 0.0039 6.1E-04 2.4E-06 9.8E-07 2.3E-06 NC 5.0E+00 NC 4.6E-07SG-1D SG-1 8 2-Hexanone 0.0044 5.5E-04 2.4E-06 1.0E-06 2.3E-06 NC 3.0E-02 NC 7.8E-05SG-1D SG-1 8 4-Ethyltoluene 0.22 5.4E-04 1.2E-04 4.8E-05 1.1E-04 NC 1.0E-01 NC 1.1E-03SG-1D SG-1 8 Acetone 0.078 8.3E-04 6.5E-05 2.7E-05 6.2E-05 NC 3.1E+01 NC 2.0E-06SG-1D SG-1 8 Benzene 0.0022 6.5E-04 1.4E-06 5.9E-07 1.4E-06 2.9E-02 3.0E-02 1.7E-08 4.6E-05SG-1D SG-1 8 Carbon Disulfide 0.00335 7.3E-04 2.5E-06 1.0E-06 2.4E-06 NC 7.0E-01 NC 3.4E-06SG-1D SG-1 8 Cumene 0.008 5.2E-04 4.1E-06 1.7E-06 4.0E-06 NC 4.0E-01 NC 9.9E-06SG-1D SG-1 8 Ethanol 0.002 8.6E-04 1.7E-06 7.1E-07 1.6E-06 NC 1.1E+00 NC 1.6E-06SG-1D SG-1 8 Ethylbenzene 0.071 5.8E-04 4.1E-05 1.7E-05 3.9E-05 2.5E-03 1.0E+00 4.2E-08 3.9E-05SG-1D SG-1 8 Freon 11 0.0012 6.5E-04 7.8E-07 3.2E-07 7.4E-07 NC 7.0E-01 NC 1.1E-06SG-1D SG-1 8 Freon 12 0.00105 5.3E-04 5.5E-07 2.3E-07 5.3E-07 NC 2.0E-01 NC 2.6E-06SG-1D SG-1 8 Heptane 0.0009 5.5E-04 5.0E-07 2.0E-07 4.7E-07 NC 7.0E-01 NC 6.8E-07SG-1D SG-1 8 Methyl tert-butyl ether 0.00075 7.3E-04 5.5E-07 2.2E-07 5.2E-07 2.6E-04 3.0E+00 5.8E-11 1.7E-07SG-1D SG-1 8 Naphthalene 0.0055 4.8E-04 2.6E-06 1.1E-06 2.5E-06 3.4E-02 3.0E-03 3.7E-08 8.4E-04SG-1D SG-1 8 Propylbenzene 0.028 4.9E-04 1.4E-05 5.6E-06 1.3E-05 NC 1.0E+00 NC 1.3E-05SG-1D SG-1 8 Styrene 0.005 5.5E-04 2.8E-06 1.1E-06 2.7E-06 NC 9.0E-01 NC 3.0E-06SG-1D SG-1 8 Tetrachloroethene 0.0039 5.6E-04 2.2E-06 9.0E-07 2.1E-06 5.9E-03 3.5E-02 5.3E-09 6.0E-05SG-1D SG-1 8 Toluene 0.013 6.5E-04 8.4E-06 3.5E-06 8.1E-06 NC 3.0E-01 NC 2.7E-05SG-1D SG-1 8 Total Xylenes 0.459 6.3E-04 2.9E-04 1.2E-04 2.8E-04 NC 1.0E-01 NC 2.8E-03SG-1D SG-1 8 Trichloroethene 0.00115 6.0E-04 6.9E-07 2.8E-07 6.6E-07 2.0E-03 6.0E-01 5.7E-10 1.1E-06 1.0E-07 2.6E-02
TABLE 23VAPOR INTRUSION CANCER RISKS AND NONCANCER HAZARD INDICES FOR VOCS IN SOIL GAS: FUTURE ON-SITE RESIDENTIAL SCENARIO
Former Lodi Manufactured Gas PlantLodi, California
Lodi_HRA_Tables Page 1 of 7 IRIS ENVIRONMENTAL
Sample ID
Soil Gas Sample
Locationa
Sampling Depth
(feet bgs) Chemical
Soil Gas Concentration
(mg/m3)b
Attenuation Factor
[(mg/m3)/(mg/m3)]c
Exposure Point
Concentration (EPC) in Indoor
Air (mg/m3)d
Exposure Concentration (EC)
in Indoor Air – Cancer Effects
(mg/m3)e
Exposure Concentration (EC)
in Indoor Air– Noncancer
Effects (mg/m3)e
URF (mg/m3)-1
RfC (mg/m3)
Incremental Cancer
Risk from Vapor
Intrusion (unitless)f
Noncancer Hazard
Quotient from Vapor
Intrusion (unitless)f
Cumulative Cancer
Risk
Cumulative Noncancer
Hazard
TABLE 23VAPOR INTRUSION CANCER RISKS AND NONCANCER HAZARD INDICES FOR VOCS IN SOIL GAS: FUTURE ON-SITE RESIDENTIAL SCENARIO
Former Lodi Manufactured Gas PlantLodi, California
SG-2S SG-2 5 1,1-Difluoroethane 0.026 1.0E-03 2.6E-05 1.1E-05 2.5E-05 NC 4.0E+01 NC 6.3E-07SG-2S SG-2 5 1,2,4-Trimethylbenzene 0.12 7.2E-04 8.6E-05 3.5E-05 8.3E-05 NC 7.0E-03 NC 1.2E-02SG-2S SG-2 5 1,3,5-Trimethylbenzene 0.041 7.2E-04 2.9E-05 1.2E-05 2.8E-05 NC 6.0E-03 NC 4.7E-03SG-2S SG-2 5 2-Butanone (Methyl Ethyl K 0.0055 8.8E-04 4.8E-06 2.0E-06 4.6E-06 NC 5.0E+00 NC 9.3E-07SG-2S SG-2 5 2-Hexanone 0.039 8.0E-04 3.1E-05 1.3E-05 3.0E-05 NC 3.0E-02 NC 1.0E-03SG-2S SG-2 5 4-Ethyltoluene 0.07 7.8E-04 5.5E-05 2.2E-05 5.2E-05 NC 1.0E-01 NC 5.2E-04SG-2S SG-2 5 Acetone 0.15 1.1E-03 1.7E-04 7.0E-05 1.6E-04 NC 3.1E+01 NC 5.3E-06SG-2S SG-2 5 Benzene 0.006 9.2E-04 5.5E-06 2.3E-06 5.3E-06 2.9E-02 3.0E-02 6.6E-08 1.8E-04SG-2S SG-2 5 Carbon Disulfide 0.0295 1.0E-03 3.0E-05 1.2E-05 2.9E-05 NC 7.0E-01 NC 4.1E-05SG-2S SG-2 5 Cumene 0.019 7.6E-04 1.4E-05 5.9E-06 1.4E-05 NC 4.0E-01 NC 3.4E-05SG-2S SG-2 5 Ethanol 0.018 1.2E-03 2.1E-05 8.6E-06 2.0E-05 NC 1.1E+00 NC 1.9E-05SG-2S SG-2 5 Ethylbenzene 0.25 8.3E-04 2.1E-04 8.6E-05 2.0E-04 2.5E-03 1.0E+00 2.1E-07 2.0E-04SG-2S SG-2 5 Freon 11 0.0105 9.2E-04 9.6E-06 4.0E-06 9.2E-06 NC 7.0E-01 NC 1.3E-05SG-2S SG-2 5 Freon 12 0.0095 7.7E-04 7.3E-06 3.0E-06 7.0E-06 NC 2.0E-01 NC 3.5E-05SG-2S SG-2 5 Heptane 0.008 8.0E-04 6.4E-06 2.6E-06 6.1E-06 NC 7.0E-01 NC 8.7E-06SG-2S SG-2 5 Methyl tert-butyl ether 0.014 1.0E-03 1.4E-05 5.8E-06 1.4E-05 2.6E-04 3.0E+00 1.5E-09 4.5E-06SG-2S SG-2 5 Naphthalene 0.05 7.1E-04 3.5E-05 1.5E-05 3.4E-05 3.4E-02 3.0E-03 4.9E-07 1.1E-02SG-2S SG-2 5 Propylbenzene 0.0095 7.2E-04 6.8E-06 2.8E-06 6.5E-06 NC 1.0E+00 NC 6.5E-06SG-2S SG-2 5 Styrene 0.008 8.0E-04 6.4E-06 2.6E-06 6.2E-06 NC 9.0E-01 NC 6.8E-06SG-2S SG-2 5 Tetrachloroethene 0.013 8.1E-04 1.1E-05 4.3E-06 1.0E-05 5.9E-03 3.5E-02 2.6E-08 2.9E-04SG-2S SG-2 5 Toluene 3.4 9.2E-04 3.1E-03 1.3E-03 3.0E-03 NC 3.0E-01 NC 1.0E-02SG-2S SG-2 5 Total Xylenes 1.34 9.0E-04 1.2E-03 5.0E-04 1.2E-03 NC 1.0E-01 NC 1.2E-02SG-2S SG-2 5 Trichloroethene 0.01 8.6E-04 8.6E-06 3.5E-06 8.3E-06 2.0E-03 6.0E-01 7.1E-09 1.4E-05 8.1E-07 5.2E-02SG-2D SG-2 8 1,1-Difluoroethane 0.06 7.3E-04 4.4E-05 1.8E-05 4.2E-05 NC 4.0E+01 NC 1.0E-06SG-2D SG-2 8 1,2,4-Trimethylbenzene 0.16 4.9E-04 7.8E-05 3.2E-05 7.5E-05 NC 7.0E-03 NC 1.1E-02SG-2D SG-2 8 1,3,5-Trimethylbenzene 0.069 4.9E-04 3.4E-05 1.4E-05 3.2E-05 NC 6.0E-03 NC 5.4E-03SG-2D SG-2 8 2-Butanone (Methyl Ethyl K 0.016 6.1E-04 9.8E-06 4.0E-06 9.4E-06 NC 5.0E+00 NC 1.9E-06SG-2D SG-2 8 2-Hexanone 0.09 5.5E-04 5.0E-05 2.0E-05 4.8E-05 NC 3.0E-02 NC 1.6E-03SG-2D SG-2 8 4-Ethyltoluene 0.091 5.4E-04 4.9E-05 2.0E-05 4.7E-05 NC 1.0E-01 NC 4.7E-04SG-2D SG-2 8 Acetone 0.26 8.3E-04 2.2E-04 8.9E-05 2.1E-04 NC 3.1E+01 NC 6.7E-06SG-2D SG-2 8 Benzene 0.017 6.5E-04 1.1E-05 4.6E-06 1.1E-05 2.9E-02 3.0E-02 1.3E-07 3.5E-04SG-2D SG-2 8 Carbon Disulfide 0.0165 7.3E-04 1.2E-05 5.0E-06 1.2E-05 NC 7.0E-01 NC 1.7E-05SG-2D SG-2 8 Cumene 0.026 5.2E-04 1.3E-05 5.5E-06 1.3E-05 NC 4.0E-01 NC 3.2E-05SG-2D SG-2 8 Ethanol 0.0405 8.6E-04 3.5E-05 1.4E-05 3.3E-05 NC 1.1E+00 NC 3.2E-05SG-2D SG-2 8 Ethylbenzene 0.69 5.8E-04 4.0E-04 1.6E-04 3.8E-04 2.5E-03 1.0E+00 4.1E-07 3.8E-04SG-2D SG-2 8 Freon 11 0.03 6.5E-04 1.9E-05 8.0E-06 1.9E-05 NC 7.0E-01 NC 2.7E-05SG-2D SG-2 8 Freon 12 0.0265 5.3E-04 1.4E-05 5.7E-06 1.3E-05 NC 2.0E-01 NC 6.7E-05SG-2D SG-2 8 Heptane 0.022 5.5E-04 1.2E-05 5.0E-06 1.2E-05 NC 7.0E-01 NC 1.7E-05SG-2D SG-2 8 Methyl tert-butyl ether 0.019 7.3E-04 1.4E-05 5.7E-06 1.3E-05 2.6E-04 3.0E+00 1.5E-09 4.4E-06SG-2D SG-2 8 Naphthalene 0.11 4.8E-04 5.3E-05 2.2E-05 5.1E-05 3.4E-02 3.0E-03 7.4E-07 1.7E-02SG-2D SG-2 8 Propylbenzene 0.0265 4.9E-04 1.3E-05 5.3E-06 1.2E-05 NC 1.0E+00 NC 1.2E-05SG-2D SG-2 8 Styrene 0.023 5.5E-04 1.3E-05 5.2E-06 1.2E-05 NC 9.0E-01 NC 1.4E-05SG-2D SG-2 8 Tetrachloroethene 0.036 5.6E-04 2.0E-05 8.3E-06 1.9E-05 5.9E-03 3.5E-02 4.9E-08 5.5E-04SG-2D SG-2 8 Toluene 8.0 6.5E-04 5.2E-03 2.1E-03 5.0E-03 NC 3.0E-01 NC 1.7E-02SG-2D SG-2 8 Total Xylenes 3.49 6.3E-04 2.2E-03 9.1E-04 2.1E-03 NC 1.0E-01 NC 2.1E-02SG-2D SG-2 8 Trichloroethene 0.029 6.0E-04 1.7E-05 7.2E-06 1.7E-05 2.0E-03 6.0E-01 1.4E-08 2.8E-05 1.3E-06 7.4E-02
Lodi_HRA_Tables Page 2 of 7 IRIS ENVIRONMENTAL
Sample ID
Soil Gas Sample
Locationa
Sampling Depth
(feet bgs) Chemical
Soil Gas Concentration
(mg/m3)b
Attenuation Factor
[(mg/m3)/(mg/m3)]c
Exposure Point
Concentration (EPC) in Indoor
Air (mg/m3)d
Exposure Concentration (EC)
in Indoor Air – Cancer Effects
(mg/m3)e
Exposure Concentration (EC)
in Indoor Air– Noncancer
Effects (mg/m3)e
URF (mg/m3)-1
RfC (mg/m3)
Incremental Cancer
Risk from Vapor
Intrusion (unitless)f
Noncancer Hazard
Quotient from Vapor
Intrusion (unitless)f
Cumulative Cancer
Risk
Cumulative Noncancer
Hazard
TABLE 23VAPOR INTRUSION CANCER RISKS AND NONCANCER HAZARD INDICES FOR VOCS IN SOIL GAS: FUTURE ON-SITE RESIDENTIAL SCENARIO
Former Lodi Manufactured Gas PlantLodi, California
SG-3S SG-3 5 1,1-Difluoroethane 0.0012 1.0E-03 1.2E-06 5.0E-07 1.2E-06 NC 4.0E+01 NC 2.9E-08SG-3S SG-3 5 1,2,4-Trimethylbenzene 0.18 7.2E-04 1.3E-04 5.3E-05 1.2E-04 NC 7.0E-03 NC 1.8E-02SG-3S SG-3 5 1,3,5-Trimethylbenzene 0.06 7.2E-04 4.3E-05 1.8E-05 4.1E-05 NC 6.0E-03 NC 6.9E-03SG-3S SG-3 5 2-Butanone (Methyl Ethyl K 0.0032 8.8E-04 2.8E-06 1.2E-06 2.7E-06 NC 5.0E+00 NC 5.4E-07SG-3S SG-3 5 2-Hexanone 0.0018 8.0E-04 1.4E-06 5.9E-07 1.4E-06 NC 3.0E-02 NC 4.6E-05SG-3S SG-3 5 4-Ethyltoluene 0.21 7.8E-04 1.6E-04 6.7E-05 1.6E-04 NC 1.0E-01 NC 1.6E-03SG-3S SG-3 5 Acetone 0.085 1.1E-03 9.6E-05 4.0E-05 9.2E-05 NC 3.1E+01 NC 3.0E-06SG-3S SG-3 5 Benzene 0.0014 9.2E-04 1.3E-06 5.3E-07 1.2E-06 2.9E-02 3.0E-02 1.5E-08 4.1E-05SG-3S SG-3 5 Carbon Disulfide 0.00135 1.0E-03 1.4E-06 5.7E-07 1.3E-06 NC 7.0E-01 NC 1.9E-06SG-3S SG-3 5 Cumene 0.011 7.6E-04 8.3E-06 3.4E-06 8.0E-06 NC 4.0E-01 NC 2.0E-05SG-3S SG-3 5 Ethanol 0.0008 1.2E-03 9.3E-07 3.8E-07 8.9E-07 NC 1.1E+00 NC 8.5E-07SG-3S SG-3 5 Ethylbenzene 0.03 8.3E-04 2.5E-05 1.0E-05 2.4E-05 2.5E-03 1.0E+00 2.6E-08 2.4E-05SG-3S SG-3 5 Freon 11 0.0013 9.2E-04 1.2E-06 4.9E-07 1.1E-06 NC 7.0E-01 NC 1.6E-06SG-3S SG-3 5 Freon 12 0.001 7.7E-04 7.7E-07 3.2E-07 7.4E-07 NC 2.0E-01 NC 3.7E-06SG-3S SG-3 5 Heptane 0.001 8.0E-04 8.0E-07 3.3E-07 7.7E-07 NC 7.0E-01 NC 1.1E-06SG-3S SG-3 5 Methyl tert-butyl ether 0.0034 1.0E-03 3.4E-06 1.4E-06 3.3E-06 2.6E-04 3.0E+00 3.7E-10 1.1E-06SG-3S SG-3 5 Naphthalene 0.023 7.1E-04 1.6E-05 6.7E-06 1.6E-05 3.4E-02 3.0E-03 2.3E-07 5.2E-03SG-3S SG-3 5 Propylbenzene 0.032 7.2E-04 2.3E-05 9.4E-06 2.2E-05 NC 1.0E+00 NC 2.2E-05SG-3S SG-3 5 Styrene 0.00037 8.0E-04 3.0E-07 1.2E-07 2.8E-07 NC 9.0E-01 NC 3.2E-07SG-3S SG-3 5 Tetrachloroethene 0.0035 8.1E-04 2.8E-06 1.2E-06 2.7E-06 5.9E-03 3.5E-02 6.9E-09 7.8E-05SG-3S SG-3 5 Toluene 0.12 9.2E-04 1.1E-04 4.5E-05 1.1E-04 NC 3.0E-01 NC 3.5E-04SG-3S SG-3 5 Total Xylenes 0.2 9.0E-04 1.8E-04 7.4E-05 1.7E-04 NC 1.0E-01 NC 1.7E-03SG-3S SG-3 5 Trichloroethene 0.0021 8.6E-04 1.8E-06 7.4E-07 1.7E-06 2.0E-03 6.0E-01 1.5E-09 2.9E-06 2.8E-07 3.4E-02SG-3D SG-3 8 1,1-Difluoroethane 0.0013 7.3E-04 9.4E-07 3.9E-07 9.1E-07 NC 4.0E+01 NC 2.3E-08SG-3D SG-3 8 1,2,4-Trimethylbenzene 0.24 4.9E-04 1.2E-04 4.8E-05 1.1E-04 NC 7.0E-03 NC 1.6E-02SG-3D SG-3 8 1,3,5-Trimethylbenzene 0.088 4.9E-04 4.3E-05 1.8E-05 4.1E-05 NC 6.0E-03 NC 6.9E-03SG-3D SG-3 8 2-Butanone (Methyl Ethyl K 0.0026 6.1E-04 1.6E-06 6.6E-07 1.5E-06 NC 5.0E+00 NC 3.1E-07SG-3D SG-3 8 2-Hexanone 0.0042 5.5E-04 2.3E-06 9.5E-07 2.2E-06 NC 3.0E-02 NC 7.4E-05SG-3D SG-3 8 4-Ethyltoluene 0.31 5.4E-04 1.7E-04 6.8E-05 1.6E-04 NC 1.0E-01 NC 1.6E-03SG-3D SG-3 8 Acetone 0.018 8.3E-04 1.5E-05 6.2E-06 1.4E-05 NC 3.1E+01 NC 4.6E-07SG-3D SG-3 8 Benzene 0.0013 6.5E-04 8.5E-07 3.5E-07 8.1E-07 2.9E-02 3.0E-02 1.0E-08 2.7E-05SG-3D SG-3 8 Carbon Disulfide 0.0015 7.3E-04 1.1E-06 4.5E-07 1.1E-06 NC 7.0E-01 NC 1.5E-06SG-3D SG-3 8 Cumene 0.01 5.2E-04 5.2E-06 2.1E-06 5.0E-06 NC 4.0E-01 NC 1.2E-05SG-3D SG-3 8 Ethanol 0.0009 8.6E-04 7.7E-07 3.2E-07 7.4E-07 NC 1.1E+00 NC 7.1E-07SG-3D SG-3 8 Ethylbenzene 0.023 5.8E-04 1.3E-05 5.5E-06 1.3E-05 2.5E-03 1.0E+00 1.4E-08 1.3E-05SG-3D SG-3 8 Freon 11 0.0014 6.5E-04 9.0E-07 3.7E-07 8.7E-07 NC 7.0E-01 NC 1.2E-06SG-3D SG-3 8 Freon 12 0.000485 5.3E-04 2.6E-07 1.0E-07 2.4E-07 NC 2.0E-01 NC 1.2E-06SG-3D SG-3 8 Heptane 0.0017 5.5E-04 9.4E-07 3.8E-07 9.0E-07 NC 7.0E-01 NC 1.3E-06SG-3D SG-3 8 Methyl tert-butyl ether 0.00071 7.3E-04 5.2E-07 2.1E-07 4.9E-07 2.6E-04 3.0E+00 5.5E-11 1.6E-07SG-3D SG-3 8 Naphthalene 0.015 4.8E-04 7.2E-06 3.0E-06 6.9E-06 3.4E-02 3.0E-03 1.0E-07 2.3E-03SG-3D SG-3 8 Propylbenzene 0.048 4.9E-04 2.3E-05 9.6E-06 2.2E-05 NC 1.0E+00 NC 2.2E-05SG-3D SG-3 8 Styrene 0.000415 5.5E-04 2.3E-07 9.4E-08 2.2E-07 NC 9.0E-01 NC 2.4E-07SG-3D SG-3 8 Tetrachloroethene 0.009 5.6E-04 5.0E-06 2.1E-06 4.8E-06 5.9E-03 3.5E-02 1.2E-08 1.4E-04SG-3D SG-3 8 Toluene 0.036 6.5E-04 2.3E-05 9.6E-06 2.2E-05 NC 3.0E-01 NC 7.4E-05SG-3D SG-3 8 Total Xylenes 0.134 6.3E-04 8.5E-05 3.5E-05 8.2E-05 NC 1.0E-01 NC 8.2E-04SG-3D SG-3 8 Trichloroethene 0.0005 6.0E-04 3.0E-07 1.2E-07 2.9E-07 2.0E-03 6.0E-01 2.5E-10 4.8E-07 1.4E-07 2.8E-02
Lodi_HRA_Tables Page 3 of 7 IRIS ENVIRONMENTAL
Sample ID
Soil Gas Sample
Locationa
Sampling Depth
(feet bgs) Chemical
Soil Gas Concentration
(mg/m3)b
Attenuation Factor
[(mg/m3)/(mg/m3)]c
Exposure Point
Concentration (EPC) in Indoor
Air (mg/m3)d
Exposure Concentration (EC)
in Indoor Air – Cancer Effects
(mg/m3)e
Exposure Concentration (EC)
in Indoor Air– Noncancer
Effects (mg/m3)e
URF (mg/m3)-1
RfC (mg/m3)
Incremental Cancer
Risk from Vapor
Intrusion (unitless)f
Noncancer Hazard
Quotient from Vapor
Intrusion (unitless)f
Cumulative Cancer
Risk
Cumulative Noncancer
Hazard
TABLE 23VAPOR INTRUSION CANCER RISKS AND NONCANCER HAZARD INDICES FOR VOCS IN SOIL GAS: FUTURE ON-SITE RESIDENTIAL SCENARIO
Former Lodi Manufactured Gas PlantLodi, California
SG-4S SG-4 5 1,1-Difluoroethane 0.00205 1.0E-03 2.1E-06 8.5E-07 2.0E-06 NC 4.0E+01 NC 5.0E-08SG-4S SG-4 5 1,2,4-Trimethylbenzene 0.059 7.2E-04 4.2E-05 1.7E-05 4.1E-05 NC 7.0E-03 NC 5.8E-03SG-4S SG-4 5 1,3,5-Trimethylbenzene 0.029 7.2E-04 2.1E-05 8.5E-06 2.0E-05 NC 6.0E-03 NC 3.3E-03SG-4S SG-4 5 2-Butanone (Methyl Ethyl K 0.004 8.8E-04 3.5E-06 1.4E-06 3.4E-06 NC 5.0E+00 NC 6.7E-07SG-4S SG-4 5 2-Hexanone 0.0031 8.0E-04 2.5E-06 1.0E-06 2.4E-06 NC 3.0E-02 NC 7.9E-05SG-4S SG-4 5 4-Ethyltoluene 0.083 7.8E-04 6.5E-05 2.7E-05 6.2E-05 NC 1.0E-01 NC 6.2E-04SG-4S SG-4 5 Acetone 0.082 1.1E-03 9.3E-05 3.8E-05 8.9E-05 NC 3.1E+01 NC 2.9E-06SG-4S SG-4 5 Benzene 0.0046 9.2E-04 4.2E-06 1.7E-06 4.1E-06 2.9E-02 3.0E-02 5.1E-08 1.4E-04SG-4S SG-4 5 Carbon Disulfide 0.034 1.0E-03 3.5E-05 1.4E-05 3.3E-05 NC 7.0E-01 NC 4.8E-05SG-4S SG-4 5 Cumene 0.022 7.6E-04 1.7E-05 6.8E-06 1.6E-05 NC 4.0E-01 NC 4.0E-05SG-4S SG-4 5 Ethanol 0.00145 1.2E-03 1.7E-06 6.9E-07 1.6E-06 NC 1.1E+00 NC 1.5E-06SG-4S SG-4 5 Ethylbenzene 0.04 8.3E-04 3.3E-05 1.4E-05 3.2E-05 2.5E-03 1.0E+00 3.4E-08 3.2E-05SG-4S SG-4 5 Freon 11 0.0018 9.2E-04 1.6E-06 6.8E-07 1.6E-06 NC 7.0E-01 NC 2.3E-06SG-4S SG-4 5 Freon 12 0.00075 7.7E-04 5.8E-07 2.4E-07 5.5E-07 NC 2.0E-01 NC 2.8E-06SG-4S SG-4 5 Heptane 0.0006 8.0E-04 4.8E-07 2.0E-07 4.6E-07 NC 7.0E-01 NC 6.6E-07SG-4S SG-4 5 Methyl tert-butyl ether 0.0011 1.0E-03 1.1E-06 4.6E-07 1.1E-06 2.6E-04 3.0E+00 1.2E-10 3.6E-07SG-4S SG-4 5 Naphthalene 0.004 7.1E-04 2.8E-06 1.2E-06 2.7E-06 3.4E-02 3.0E-03 3.9E-08 9.0E-04SG-4S SG-4 5 Propylbenzene 0.012 7.2E-04 8.6E-06 3.5E-06 8.2E-06 NC 1.0E+00 NC 8.2E-06SG-4S SG-4 5 Styrene 0.00065 8.0E-04 5.2E-07 2.1E-07 5.0E-07 NC 9.0E-01 NC 5.6E-07SG-4S SG-4 5 Tetrachloroethene 0.0026 8.1E-04 2.1E-06 8.7E-07 2.0E-06 5.9E-03 3.5E-02 5.1E-09 5.8E-05SG-4S SG-4 5 Toluene 0.0069 9.2E-04 6.3E-06 2.6E-06 6.1E-06 NC 3.0E-01 NC 2.0E-05SG-4S SG-4 5 Total Xylenes 0.252 9.0E-04 2.3E-04 9.3E-05 2.2E-04 NC 1.0E-01 NC 2.2E-03SG-4S SG-4 5 Trichloroethene 0.0062 8.6E-04 5.3E-06 2.2E-06 5.1E-06 2.0E-03 6.0E-01 4.4E-09 8.5E-06 1.3E-07 1.3E-02SG-4D SG-4 8 1,1-Difluoroethane 0.011 7.3E-04 8.0E-06 3.3E-06 7.7E-06 NC 4.0E+01 NC 1.9E-07SG-4D SG-4 8 1,2,4-Trimethylbenzene 0.045 4.9E-04 2.2E-05 9.0E-06 2.1E-05 NC 7.0E-03 NC 3.0E-03SG-4D SG-4 8 1,3,5-Trimethylbenzene 0.026 4.9E-04 1.3E-05 5.2E-06 1.2E-05 NC 6.0E-03 NC 2.0E-03SG-4D SG-4 8 2-Butanone (Methyl Ethyl K 0.0078 6.1E-04 4.8E-06 2.0E-06 4.6E-06 NC 5.0E+00 NC 9.2E-07SG-4D SG-4 8 2-Hexanone 0.017 5.5E-04 9.4E-06 3.9E-06 9.0E-06 NC 3.0E-02 NC 3.0E-04SG-4D SG-4 8 4-Ethyltoluene 0.072 5.4E-04 3.9E-05 1.6E-05 3.7E-05 NC 1.0E-01 NC 3.7E-04SG-4D SG-4 8 Acetone 0.21 8.3E-04 1.7E-04 7.2E-05 1.7E-04 NC 3.1E+01 NC 5.4E-06SG-4D SG-4 8 Benzene 0.0075 6.5E-04 4.9E-06 2.0E-06 4.7E-06 2.9E-02 3.0E-02 5.8E-08 1.6E-04SG-4D SG-4 8 Carbon Disulfide 0.013 7.3E-04 9.5E-06 3.9E-06 9.2E-06 NC 7.0E-01 NC 1.3E-05SG-4D SG-4 8 Cumene 0.027 5.2E-04 1.4E-05 5.7E-06 1.3E-05 NC 4.0E-01 NC 3.3E-05SG-4D SG-4 8 Ethanol 0.008 8.6E-04 6.9E-06 2.8E-06 6.6E-06 NC 1.1E+00 NC 6.3E-06SG-4D SG-4 8 Ethylbenzene 0.042 5.8E-04 2.4E-05 1.0E-05 2.3E-05 2.5E-03 1.0E+00 2.5E-08 2.3E-05SG-4D SG-4 8 Freon 11 0.0047 6.5E-04 3.0E-06 1.2E-06 2.9E-06 NC 7.0E-01 NC 4.2E-06SG-4D SG-4 8 Freon 12 0.0041 5.3E-04 2.2E-06 8.9E-07 2.1E-06 NC 2.0E-01 NC 1.0E-05SG-4D SG-4 8 Heptane 0.0034 5.5E-04 1.9E-06 7.7E-07 1.8E-06 NC 7.0E-01 NC 2.6E-06SG-4D SG-4 8 Methyl tert-butyl ether 0.006 7.3E-04 4.4E-06 1.8E-06 4.2E-06 2.6E-04 3.0E+00 4.7E-10 1.4E-06SG-4D SG-4 8 Naphthalene 0.022 4.8E-04 1.1E-05 4.3E-06 1.0E-05 3.4E-02 3.0E-03 1.5E-07 3.4E-03SG-4D SG-4 8 Propylbenzene 0.01 4.9E-04 4.9E-06 2.0E-06 4.7E-06 NC 1.0E+00 NC 4.7E-06SG-4D SG-4 8 Styrene 0.00355 5.5E-04 2.0E-06 8.1E-07 1.9E-06 NC 9.0E-01 NC 2.1E-06SG-4D SG-4 8 Tetrachloroethene 0.0055 5.6E-04 3.1E-06 1.3E-06 3.0E-06 5.9E-03 3.5E-02 7.5E-09 8.4E-05SG-4D SG-4 8 Toluene 0.0099 6.5E-04 6.4E-06 2.6E-06 6.1E-06 NC 3.0E-01 NC 2.0E-05SG-4D SG-4 8 Total Xylenes 0.25 6.3E-04 1.6E-04 6.5E-05 1.5E-04 NC 1.0E-01 NC 1.5E-03SG-4D SG-4 8 Trichloroethene 0.0045 6.0E-04 2.7E-06 1.1E-06 2.6E-06 2.0E-03 6.0E-01 2.2E-09 4.3E-06 2.4E-07 1.1E-02
Lodi_HRA_Tables Page 4 of 7 IRIS ENVIRONMENTAL
Sample ID
Soil Gas Sample
Locationa
Sampling Depth
(feet bgs) Chemical
Soil Gas Concentration
(mg/m3)b
Attenuation Factor
[(mg/m3)/(mg/m3)]c
Exposure Point
Concentration (EPC) in Indoor
Air (mg/m3)d
Exposure Concentration (EC)
in Indoor Air – Cancer Effects
(mg/m3)e
Exposure Concentration (EC)
in Indoor Air– Noncancer
Effects (mg/m3)e
URF (mg/m3)-1
RfC (mg/m3)
Incremental Cancer
Risk from Vapor
Intrusion (unitless)f
Noncancer Hazard
Quotient from Vapor
Intrusion (unitless)f
Cumulative Cancer
Risk
Cumulative Noncancer
Hazard
TABLE 23VAPOR INTRUSION CANCER RISKS AND NONCANCER HAZARD INDICES FOR VOCS IN SOIL GAS: FUTURE ON-SITE RESIDENTIAL SCENARIO
Former Lodi Manufactured Gas PlantLodi, California
SG-5S SG-5 5 1,1-Difluoroethane 0.0055 1.0E-03 5.6E-06 2.3E-06 5.3E-06 NC 4.0E+01 NC 1.3E-07SG-5S SG-5 5 1,2,4-Trimethylbenzene 0.066 7.2E-04 4.7E-05 2.0E-05 4.6E-05 NC 7.0E-03 NC 6.5E-03SG-5S SG-5 5 1,3,5-Trimethylbenzene 0.026 7.2E-04 1.9E-05 7.7E-06 1.8E-05 NC 6.0E-03 NC 3.0E-03SG-5S SG-5 5 2-Butanone (Methyl Ethyl K 0.0044 8.8E-04 3.9E-06 1.6E-06 3.7E-06 NC 5.0E+00 NC 7.4E-07SG-5S SG-5 5 2-Hexanone 0.0085 8.0E-04 6.8E-06 2.8E-06 6.5E-06 NC 3.0E-02 NC 2.2E-04SG-5S SG-5 5 4-Ethyltoluene 0.066 7.8E-04 5.1E-05 2.1E-05 4.9E-05 NC 1.0E-01 NC 4.9E-04SG-5S SG-5 5 Acetone 0.18 1.1E-03 2.0E-04 8.4E-05 2.0E-04 NC 3.1E+01 NC 6.3E-06SG-5S SG-5 5 Benzene 0.00135 9.2E-04 1.2E-06 5.1E-07 1.2E-06 2.9E-02 3.0E-02 1.5E-08 4.0E-05SG-5S SG-5 5 Carbon Disulfide 0.0065 1.0E-03 6.6E-06 2.7E-06 6.4E-06 NC 7.0E-01 NC 9.1E-06SG-5S SG-5 5 Cumene 0.0056 7.6E-04 4.2E-06 1.7E-06 4.1E-06 NC 4.0E-01 NC 1.0E-05SG-5S SG-5 5 Ethanol 0.00395 1.2E-03 4.6E-06 1.9E-06 4.4E-06 NC 1.1E+00 NC 4.2E-06SG-5S SG-5 5 Ethylbenzene 0.0037 8.3E-04 3.1E-06 1.3E-06 3.0E-06 2.5E-03 1.0E+00 3.2E-09 3.0E-06SG-5S SG-5 5 Freon 11 0.00235 9.2E-04 2.2E-06 8.8E-07 2.1E-06 NC 7.0E-01 NC 2.9E-06SG-5S SG-5 5 Freon 12 0.0021 7.7E-04 1.6E-06 6.6E-07 1.5E-06 NC 2.0E-01 NC 7.7E-06SG-5S SG-5 5 Heptane 0.0017 8.0E-04 1.4E-06 5.6E-07 1.3E-06 NC 7.0E-01 NC 1.9E-06SG-5S SG-5 5 Methyl tert-butyl ether 0.0015 1.0E-03 1.5E-06 6.2E-07 1.5E-06 2.6E-04 3.0E+00 1.6E-10 4.9E-07SG-5S SG-5 5 Naphthalene 0.011 7.1E-04 7.8E-06 3.2E-06 7.5E-06 3.4E-02 3.0E-03 1.1E-07 2.5E-03SG-5S SG-5 5 Propylbenzene 0.0096 7.2E-04 6.9E-06 2.8E-06 6.6E-06 NC 1.0E+00 NC 6.6E-06SG-5S SG-5 5 Styrene 0.0018 8.0E-04 1.4E-06 5.9E-07 1.4E-06 NC 9.0E-01 NC 1.5E-06SG-5S SG-5 5 Tetrachloroethene 0.00285 8.1E-04 2.3E-06 9.5E-07 2.2E-06 5.9E-03 3.5E-02 5.6E-09 6.3E-05SG-5S SG-5 5 Toluene 0.036 9.2E-04 3.3E-05 1.4E-05 3.2E-05 NC 3.0E-01 NC 1.1E-04SG-5S SG-5 5 Total Xylenes 0.0263 9.0E-04 2.4E-05 9.8E-06 2.3E-05 NC 1.0E-01 NC 2.3E-04SG-5S SG-5 5 Trichloroethene 0.00225 8.6E-04 1.9E-06 8.0E-07 1.9E-06 2.0E-03 6.0E-01 1.6E-09 3.1E-06 1.3E-07 1.3E-02SG-5D SG-5 8 1,1-Difluoroethane 0.0051 7.3E-04 3.7E-06 1.5E-06 3.6E-06 NC 4.0E+01 NC 8.9E-08SG-5D SG-5 8 1,2,4-Trimethylbenzene 0.12 4.9E-04 5.9E-05 2.4E-05 5.6E-05 NC 7.0E-03 NC 8.0E-03SG-5D SG-5 8 1,3,5-Trimethylbenzene 0.05 4.9E-04 2.4E-05 1.0E-05 2.3E-05 NC 6.0E-03 NC 3.9E-03SG-5D SG-5 8 2-Butanone (Methyl Ethyl K 0.0081 6.1E-04 5.0E-06 2.0E-06 4.8E-06 NC 5.0E+00 NC 9.5E-07SG-5D SG-5 8 2-Hexanone 0.009 5.5E-04 5.0E-06 2.0E-06 4.8E-06 NC 3.0E-02 NC 1.6E-04SG-5D SG-5 8 4-Ethyltoluene 0.11 5.4E-04 5.9E-05 2.4E-05 5.7E-05 NC 1.0E-01 NC 5.7E-04SG-5D SG-5 8 Acetone 0.25 8.3E-04 2.1E-04 8.6E-05 2.0E-04 NC 3.1E+01 NC 6.4E-06SG-5D SG-5 8 Benzene 0.0014 6.5E-04 9.1E-07 3.7E-07 8.7E-07 2.9E-02 3.0E-02 1.1E-08 2.9E-05SG-5D SG-5 8 Carbon Disulfide 0.007 7.3E-04 5.1E-06 2.1E-06 4.9E-06 NC 7.0E-01 NC 7.0E-06SG-5D SG-5 8 Cumene 0.0022 5.2E-04 1.1E-06 4.7E-07 1.1E-06 NC 4.0E-01 NC 2.7E-06SG-5D SG-5 8 Ethanol 0.016 8.6E-04 1.4E-05 5.6E-06 1.3E-05 NC 1.1E+00 NC 1.3E-05SG-5D SG-5 8 Ethylbenzene 0.00195 5.8E-04 1.1E-06 4.6E-07 1.1E-06 2.5E-03 1.0E+00 1.2E-09 1.1E-06SG-5D SG-5 8 Freon 11 0.0025 6.5E-04 1.6E-06 6.6E-07 1.5E-06 NC 7.0E-01 NC 2.2E-06SG-5D SG-5 8 Freon 12 0.0022 5.3E-04 1.2E-06 4.8E-07 1.1E-06 NC 2.0E-01 NC 5.6E-06SG-5D SG-5 8 Heptane 0.00185 5.5E-04 1.0E-06 4.2E-07 9.8E-07 NC 7.0E-01 NC 1.4E-06SG-5D SG-5 8 Methyl tert-butyl ether 0.0016 7.3E-04 1.2E-06 4.8E-07 1.1E-06 2.6E-04 3.0E+00 1.2E-10 3.7E-07SG-5D SG-5 8 Naphthalene 0.0115 4.8E-04 5.5E-06 2.3E-06 5.3E-06 3.4E-02 3.0E-03 7.7E-08 1.8E-03SG-5D SG-5 8 Propylbenzene 0.016 4.9E-04 7.8E-06 3.2E-06 7.5E-06 NC 1.0E+00 NC 7.5E-06SG-5D SG-5 8 Styrene 0.0019 5.5E-04 1.1E-06 4.3E-07 1.0E-06 NC 9.0E-01 NC 1.1E-06SG-5D SG-5 8 Tetrachloroethene 0.00305 5.6E-04 1.7E-06 7.0E-07 1.6E-06 5.9E-03 3.5E-02 4.1E-09 4.7E-05SG-5D SG-5 8 Toluene 0.051 6.5E-04 3.3E-05 1.4E-05 3.2E-05 NC 3.0E-01 NC 1.1E-04SG-5D SG-5 8 Total Xylenes 0.0198 6.3E-04 1.3E-05 5.2E-06 1.2E-05 NC 1.0E-01 NC 1.2E-04SG-5D SG-5 8 Trichloroethene 0.0024 6.0E-04 1.4E-06 5.9E-07 1.4E-06 2.0E-03 6.0E-01 1.2E-09 2.3E-06 9.4E-08 1.5E-02
Lodi_HRA_Tables Page 5 of 7 IRIS ENVIRONMENTAL
Sample ID
Soil Gas Sample
Locationa
Sampling Depth
(feet bgs) Chemical
Soil Gas Concentration
(mg/m3)b
Attenuation Factor
[(mg/m3)/(mg/m3)]c
Exposure Point
Concentration (EPC) in Indoor
Air (mg/m3)d
Exposure Concentration (EC)
in Indoor Air – Cancer Effects
(mg/m3)e
Exposure Concentration (EC)
in Indoor Air– Noncancer
Effects (mg/m3)e
URF (mg/m3)-1
RfC (mg/m3)
Incremental Cancer
Risk from Vapor
Intrusion (unitless)f
Noncancer Hazard
Quotient from Vapor
Intrusion (unitless)f
Cumulative Cancer
Risk
Cumulative Noncancer
Hazard
TABLE 23VAPOR INTRUSION CANCER RISKS AND NONCANCER HAZARD INDICES FOR VOCS IN SOIL GAS: FUTURE ON-SITE RESIDENTIAL SCENARIO
Former Lodi Manufactured Gas PlantLodi, California
SG-6S SG-6 5 1,1-Difluoroethane 0.006 1.0E-03 6.1E-06 2.5E-06 5.8E-06 NC 4.0E+01 NC 1.5E-07SG-6S SG-6 5 1,2,4-Trimethylbenzene 0.011 7.2E-04 7.9E-06 3.3E-06 7.6E-06 NC 7.0E-03 NC 1.1E-03SG-6S SG-6 5 1,3,5-Trimethylbenzene 0.0021 7.2E-04 1.5E-06 6.2E-07 1.4E-06 NC 6.0E-03 NC 2.4E-04SG-6S SG-6 5 2-Butanone (Methyl Ethyl K 0.004 8.8E-04 3.5E-06 1.4E-06 3.4E-06 NC 5.0E+00 NC 6.7E-07SG-6S SG-6 5 2-Hexanone 0.009 8.0E-04 7.2E-06 3.0E-06 6.9E-06 NC 3.0E-02 NC 2.3E-04SG-6S SG-6 5 4-Ethyltoluene 0.008 7.8E-04 6.2E-06 2.6E-06 6.0E-06 NC 1.0E-01 NC 6.0E-05SG-6S SG-6 5 Acetone 0.03 1.1E-03 3.4E-05 1.4E-05 3.3E-05 NC 3.1E+01 NC 1.1E-06SG-6S SG-6 5 Benzene 0.00135 9.2E-04 1.2E-06 5.1E-07 1.2E-06 2.9E-02 3.0E-02 1.5E-08 4.0E-05SG-6S SG-6 5 Carbon Disulfide 0.0065 1.0E-03 6.6E-06 2.7E-06 6.4E-06 NC 7.0E-01 NC 9.1E-06SG-6S SG-6 5 Cumene 0.0021 7.6E-04 1.6E-06 6.5E-07 1.5E-06 NC 4.0E-01 NC 3.8E-06SG-6S SG-6 5 Ethanol 0.004 1.2E-03 4.6E-06 1.9E-06 4.5E-06 NC 1.1E+00 NC 4.2E-06SG-6S SG-6 5 Ethylbenzene 0.037 8.3E-04 3.1E-05 1.3E-05 3.0E-05 2.5E-03 1.0E+00 3.2E-08 3.0E-05SG-6S SG-6 5 Freon 11 0.0024 9.2E-04 2.2E-06 9.0E-07 2.1E-06 NC 7.0E-01 NC 3.0E-06SG-6S SG-6 5 Freon 12 0.0021 7.7E-04 1.6E-06 6.6E-07 1.5E-06 NC 2.0E-01 NC 7.7E-06SG-6S SG-6 5 Heptane 0.0076 8.0E-04 6.1E-06 2.5E-06 5.8E-06 NC 7.0E-01 NC 8.3E-06SG-6S SG-6 5 Methyl tert-butyl ether 0.00155 1.0E-03 1.6E-06 6.4E-07 1.5E-06 2.6E-04 3.0E+00 1.7E-10 5.0E-07SG-6S SG-6 5 Naphthalene 0.011 7.1E-04 7.8E-06 3.2E-06 7.5E-06 3.4E-02 3.0E-03 1.1E-07 2.5E-03SG-6S SG-6 5 Propylbenzene 0.0021 7.2E-04 1.5E-06 6.2E-07 1.4E-06 NC 1.0E+00 NC 1.4E-06SG-6S SG-6 5 Styrene 0.0018 8.0E-04 1.4E-06 5.9E-07 1.4E-06 NC 9.0E-01 NC 1.5E-06SG-6S SG-6 5 Tetrachloroethene 0.0029 8.1E-04 2.3E-06 9.7E-07 2.3E-06 5.9E-03 3.5E-02 5.7E-09 6.4E-05SG-6S SG-6 5 Toluene 0.57 9.2E-04 5.2E-04 2.1E-04 5.0E-04 NC 3.0E-01 NC 1.7E-03SG-6S SG-6 5 Total Xylenes 0.182 9.0E-04 1.6E-04 6.8E-05 1.6E-04 NC 1.0E-01 NC 1.6E-03SG-6S SG-6 5 Trichloroethene 0.0023 8.6E-04 2.0E-06 8.1E-07 1.9E-06 2.0E-03 6.0E-01 1.6E-09 3.2E-06 1.6E-07 7.5E-03
Lodi_HRA_Tables Page 6 of 7 IRIS ENVIRONMENTAL
Sample ID
Soil Gas Sample
Locationa
Sampling Depth
(feet bgs) Chemical
Soil Gas Concentration
(mg/m3)b
Attenuation Factor
[(mg/m3)/(mg/m3)]c
Exposure Point
Concentration (EPC) in Indoor
Air (mg/m3)d
Exposure Concentration (EC)
in Indoor Air – Cancer Effects
(mg/m3)e
Exposure Concentration (EC)
in Indoor Air– Noncancer
Effects (mg/m3)e
URF (mg/m3)-1
RfC (mg/m3)
Incremental Cancer
Risk from Vapor
Intrusion (unitless)f
Noncancer Hazard
Quotient from Vapor
Intrusion (unitless)f
Cumulative Cancer
Risk
Cumulative Noncancer
Hazard
TABLE 23VAPOR INTRUSION CANCER RISKS AND NONCANCER HAZARD INDICES FOR VOCS IN SOIL GAS: FUTURE ON-SITE RESIDENTIAL SCENARIO
Former Lodi Manufactured Gas PlantLodi, California
SG-6D SG-6 8 1,1-Difluoroethane 0.0115 7.3E-04 8.3E-06 3.4E-06 8.0E-06 NC 4.0E+01 NC 2.0E-07SG-6D SG-6 8 1,2,4-Trimethylbenzene 0.016 4.9E-04 7.8E-06 3.2E-06 7.5E-06 NC 7.0E-03 NC 1.1E-03SG-6D SG-6 8 1,3,5-Trimethylbenzene 0.0041 4.9E-04 2.0E-06 8.2E-07 1.9E-06 NC 6.0E-03 NC 3.2E-04SG-6D SG-6 8 2-Butanone (Methyl Ethyl K 0.0069 6.1E-04 4.2E-06 1.7E-06 4.1E-06 NC 5.0E+00 NC 8.1E-07SG-6D SG-6 8 2-Hexanone 0.017 5.5E-04 9.4E-06 3.9E-06 9.0E-06 NC 3.0E-02 NC 3.0E-04SG-6D SG-6 8 4-Ethyltoluene 0.012 5.4E-04 6.4E-06 2.6E-06 6.2E-06 NC 1.0E-01 NC 6.2E-05SG-6D SG-6 8 Acetone 0.06 8.3E-04 5.0E-05 2.1E-05 4.8E-05 NC 3.1E+01 NC 1.5E-06SG-6D SG-6 8 Benzene 0.0027 6.5E-04 1.8E-06 7.2E-07 1.7E-06 2.9E-02 3.0E-02 2.1E-08 5.6E-05SG-6D SG-6 8 Carbon Disulfide 0.013 7.3E-04 9.5E-06 3.9E-06 9.2E-06 NC 7.0E-01 NC 1.3E-05SG-6D SG-6 8 Cumene 0.0041 5.2E-04 2.1E-06 8.7E-07 2.0E-06 NC 4.0E-01 NC 5.1E-06SG-6D SG-6 8 Ethanol 0.008 8.6E-04 6.9E-06 2.8E-06 6.6E-06 NC 1.1E+00 NC 6.3E-06SG-6D SG-6 8 Ethylbenzene 0.069 5.8E-04 4.0E-05 1.6E-05 3.8E-05 2.5E-03 1.0E+00 4.1E-08 3.8E-05SG-6D SG-6 8 Freon 11 0.0047 6.5E-04 3.0E-06 1.2E-06 2.9E-06 NC 7.0E-01 NC 4.2E-06SG-6D SG-6 8 Freon 12 0.00415 5.3E-04 2.2E-06 9.0E-07 2.1E-06 NC 2.0E-01 NC 1.0E-05SG-6D SG-6 8 Heptane 0.013 5.5E-04 7.2E-06 2.9E-06 6.9E-06 NC 7.0E-01 NC 9.8E-06SG-6D SG-6 8 Methyl tert-butyl ether 0.003 7.3E-04 2.2E-06 9.0E-07 2.1E-06 2.6E-04 3.0E+00 2.3E-10 7.0E-07SG-6D SG-6 8 Naphthalene 0.022 4.8E-04 1.1E-05 4.3E-06 1.0E-05 3.4E-02 3.0E-03 1.5E-07 3.4E-03SG-6D SG-6 8 Propylbenzene 0.0041 4.9E-04 2.0E-06 8.2E-07 1.9E-06 NC 1.0E+00 NC 1.9E-06SG-6D SG-6 8 Styrene 0.0036 5.5E-04 2.0E-06 8.2E-07 1.9E-06 NC 9.0E-01 NC 2.1E-06SG-6D SG-6 8 Tetrachloroethene 0.0055 5.6E-04 3.1E-06 1.3E-06 3.0E-06 5.9E-03 3.5E-02 7.5E-09 8.4E-05SG-6D SG-6 8 Toluene 1 6.5E-04 6.5E-04 2.7E-04 6.2E-04 NC 3.0E-01 NC 2.1E-03SG-6D SG-6 8 Total Xylenes 0.34 6.3E-04 2.2E-04 8.9E-05 2.1E-04 NC 1.0E-01 NC 2.1E-03SG-6D SG-6 8 Trichloroethene 0.0045 6.0E-04 2.7E-06 1.1E-06 2.6E-06 2.0E-03 6.0E-01 2.2E-09 4.3E-06 2.1E-08 1.8E-03
Notes:
bgs = below ground surface
NC = Not considered to be a carcinogen.
mg/m3 = micrograms per cubic meter
f Incremental cancer risks and noncancer hazard quotients were calculated using equations presented in Table 5 and exposure parameters presented in Table 4.
a All locations and depths are included.b Measured chemical concentration in soil gas. Detected results are presented in bold. Non-detect results are represented by one-half the laboratory reporting limit; non-detect results are included if the chemical was detected in at least one site soil gas sample. In the case of non-detect results in both duplicate and primary samples, one-half of the lower of the two detection limits was evaluated.
d The exposure point concentration (EPC) in indoor air is the actual concentration the receptor is exposed to while in indoor air. e The exposure concentrations (ECs) are analagous to chronic daily intakes (CDIs).
c The attenuation factor represents the relationship between the chemical concentration in soil gas and the chemical concentration in indoor air (resulting from volatilization from soil gas, i.e. , vapor intrusion). The methodology used in the calculation of attenuation factors is presented in Attachment D.
Lodi_HRA_Tables Page 7 of 7 IRIS ENVIRONMENTAL
Cancer Risk-Based or
Ambient-Based Screening
Concentrations (mg/kg) a
Noncancer Risk-Based or
Ambient-Based Screening
Concentrations (mg/kg) b
ChemicalOn-site
ResidentOn-site
Resident Child
Volatile Organic CompoundsBenzene 0.51 114Ethylbenzene 5.79 Sat(3,279)Toluene NC Sat(1,486)m,p-Xylene NC Sat(679)o-Xylene NC Sat(744)Polycyclic Aromatic Hydrocarbons1-Methylnaphthalene 17 2002-Methylnaphthalene NC 203Acenaphthene NC Sat(3,102)Acenaphthylene NC 3,270Anthracene NC 16,351Benzo (a) anthracene NA 1,635Benzo (a) pyrene NA 1,635Benzo (b) fluoranthene NA 1,635Benzo (g,h,i) perylene NC 1,635Benzo (k) fluoranthene NA 1,635Chrysene NA 1,635Dibenz (a,h) Anthracene NA 1,635Fluoranthene NC 2,180Fluorene NC 2,180Indeno (1,2,3-c,d) pyrene NA 1,635Naphthalene 2.1 182Phenanthrene NC 16,351Pyrene NC 1,635Carcinogenic Polycyclic Aromatic HydrocarbonsBenzo(a)pyrene Equivalent ABSC (0.9) NAInorganicsAmmonia (as N) NC 12,125Antimony NC 30Barium NC 14,841Beryllium 1,216 15Cadmium 695 39Chromium NC 114,013Cobalt 324 23Copper NC 3,040Cyanide, Total NC 36Lead NC 80Mercury NC 12Molybdenum NC 380Nickel 11,222 1,484Silver NC 380Thallium NC 5.0Vanadium NC 380
Lodi, California
TABLE 24SOIL RISK-BASED OR AMBIENT-BASED SCREENING CONCENTRATIONS:
FUTURE ON-SITE RESIDENTIAL SCENARIOFormer Lodi Manufactured Gas Plant
c
d
Lodi_HRA_Tables Page 1 of 2 IRIS ENVIRONMENTAL
Cancer Risk-Based or
Ambient-Based Screening
Concentrations (mg/kg) a
Noncancer Risk-Based or
Ambient-Based Screening
Concentrations (mg/kg) b
ChemicalOn-site
ResidentOn-site
Resident Child
Lodi, California
TABLE 24SOIL RISK-BASED OR AMBIENT-BASED SCREENING CONCENTRATIONS:
FUTURE ON-SITE RESIDENTIAL SCENARIOFormer Lodi Manufactured Gas Plant
Zinc NC 22,803
Notes:NC = NA =
mg/kg = ABSC() =
Sat() =
a
b
c
d Cal/EPA's OEHHA CHHSL for residential exposure.
Noncarcinogenic compoundsNot applicable, evaluated under carcinogenic PAH as benzo(a)pyrene equivalent.
milligrams per kilogramThe value indicated in parentheses corresponds to the ambient-based screening concentration. For benzo(a)pryene equivalent, the risk-based screening concentration (RBSC) for the on-site resident is 0.036 mg/kg, which is below the ABSC ( i.e., 95th percentile of the Northern California background dataset, see Table 25).
The RBSCs indicated in parentheses represent an RBSC that is greater than the theoretical soil saturation limit for that compound. Soil saturation limits for each chemical are presented in Table 9.
RBSCs for carcinogenic effects presented in this table correspond to an incremental cancer risk of 1 x 10-6. RBSCs corresponding to incremental cancer risks of 10-5 and 10-4 would be 10 times and 100 times higher, respectively, than the RBSCs presented in this table.
Please note that the RBSCs for all volatile compounds are incredibly sensitive to the screening level assumptions made regarding the amount of mass available for transport. They are intentionally low (conservative), to allow for a quick screening and identification of potential problem areas. Following remediation, the actual post-remedial conditions will be accounted for in the final post-remediation health risk assessment.
RBSCs for noncarcinogenic effects presented in this table correspond to a hazard index of 1.0.
Lodi_HRA_Tables Page 2 of 2 IRIS ENVIRONMENTAL
Summary Statistics Northern California CPAH
Ambient DataNumber of Samples 86Minimum 0.0027Maximum 2.8Average a 0.21Standard Deviation 0.4295% UCL 0.40UTLc (95% coverage, 95% confidence) 1.595th Percentile 0.92
Notes:
a
b
c
Corresponds to the arithmetic average concentration.Corresponds to the 95% Upper confidence limit (UCL) of the mean calculated based on the assumption of lognormality.Corresponds to the Upper Tolerance Limit (with 95% coverage and 95% confidence) calculated based on the assumption of lognormality.
TABLE 25SUMMARY STATISTICS FOR AMBIENT CPAH DATA
Former Lodi Manufactured Gas PlantLodi, California
CPAH = Carcinogenic polycyclic aromatic hydrocarbons, expressed in terms of benzo(a)pyrene equivalents.
Lodi_HRA_Tables Page 1 of 1 IRIS ENVIRONMENTAL
Area Sample NameSample Depth
(feet bgs)Chemical Concentration
(mg/kg)
Risk-Based or Ambient-Based
Screening Concentration
On-site SB-5-0' 0.0 Lead 1100 80On-site SB-5-0' 0.0 Benzo(a)pyrene Equivalent 29 0.9On-site SB-6-12.5' 12.5 Lead 93 80On-site SB-6-12.5' 12.5 Naphthalene 1500 2.1On-site SB-6-12.5' 12.5 Benzo(a)pyrene Equivalent 118 0.9On-site SB-6-12.5' 12.5 Benzene 3700 0.51On-site SB-6-12.5' 12.5 Ethylbenzene 40 5.8On-site SB-6-7.5' 7.5 Naphthalene 12 2.1On-site SB-6-7.5' 7.5 Benzo(a)pyrene Equivalent 7.2 0.9On-site SB-6-9.5' 9.5 Naphthalene 790 2.1On-site SB-6-9.5' 9.5 Benzo(a)pyrene Equivalent 54 0.9On-site SB-6-9.5' 9.5 Benzene 2700 0.51On-site SB-6-9.5' 9.5 Ethylbenzene 50 5.8On-site SB-7-0' 0.0 Lead 988 80On-site SB-7-0' 0.0 Naphthalene 180 2.1On-site SB-7-0' 0.0 Benzo(a)pyrene Equivalent 96 0.9On-site SB-7-6' 6.0 Lead 227 80On-site SB-7-6' 6.0 Naphthalene 27 2.1On-site SB-7-6' 6.0 Benzo(a)pyrene Equivalent 33 0.9On-site SB-7-6' (DUP- 6.0 Benzo(a)pyrene Equivalent 1.5 0.9On-site SB-8-5.5' 5.5 Lead 97 80On-site SB-8-5.5' 5.5 Naphthalene 67 2.1On-site SB-8-5.5' 5.5 Benzo(a)pyrene Equivalent 53 0.9On-site SB-9-0' 0.0 Lead 153 80On-site SB-9-0' 0.0 Benzo(a)pyrene Equivalent 4.8 0.9On-site SB-9-6' 6.0 Benzo(a)pyrene Equivalent 1.2 0.9On-site SB-10-1.5' 1.5 Cobalt 139 23On-site SB-10-1.5' 1.5 Naphthalene 2.7 2.1On-site SB-10-1.5' 1.5 Benzo(a)pyrene Equivalent 3.3 0.9On-site SB-13-0' 0.0 Lead 386 80On-site SB-13-0' 0.0 Naphthalene 19 2.1On-site SB-13-0' 0.0 Benzo(a)pyrene Equivalent 94 0.9On-site SB-13-3' 3.0 Lead 116 80On-site SB-13-3' 3.0 Naphthalene 3.4 2.1On-site SB-13-3' 3.0 Benzo(a)pyrene Equivalent 28 0.9On-site SB-14-0' 0.0 Lead 145 80On-site SB-14-0' 0.0 Benzo(a)pyrene Equivalent 2.2 0.9On-site SB-14-2' 2.0 Lead 143 80On-site SB-14-2' 2.0 Naphthalene 510 2.1On-site SB-14-2' 2.0 Benzo(a)pyrene Equivalent 85 0.9On-site SB-14-3' 3.0 Naphthalene 460 2.1On-site SB-14-3' 3.0 Benzo(a)pyrene Equivalent 71 0.9On-site SB-14-6' 6.0 Naphthalene 170 2.1On-site SB-14-6' 6.0 Benzo(a)pyrene Equivalent 20 0.9On-site SB-15-0' 0.0 Lead 261 80On-site SB-15-0' 0.0 Naphthalene 4.1 2.1On-site SB-15-0' 0.0 Benzo(a)pyrene Equivalent 15 0.9
TABLE 26SUMMARY OF SAMPLES WITH CHEMICALS ABOVE
RISK-BASED OR AMBIENT-BASED SCREENING CONCENTRATIONSFormer Lodi Manufactured Gas Plant
Lodi, California
Lodi_HRA_Tables Page 1 of 4 IRIS ENVIRONMENTAL
Area Sample NameSample Depth
(feet bgs)Chemical Concentration
(mg/kg)
Risk-Based or Ambient-Based
Screening Concentration
TABLE 26SUMMARY OF SAMPLES WITH CHEMICALS ABOVE
RISK-BASED OR AMBIENT-BASED SCREENING CONCENTRATIONSFormer Lodi Manufactured Gas Plant
Lodi, California
On-site SB-15-3' 3.0 Naphthalene 3.0 2.1On-site SB-15-3' 3.0 Benzo(a)pyrene Equivalent 10 0.9On-site SB-15-6' 6.0 Benzo(a)pyrene Equivalent 2.5 0.9On-site SB-16-1' 1.0 Lead 371 80On-site SB-16-1' 1.0 Benzo(a)pyrene Equivalent 16 0.9On-site SB-17-1' 1.0 Lead 863 80On-site SB-17-1' 1.0 Benzo(a)pyrene Equivalent 4.2 0.9On-site SB-17-20.5' 20.5 Naphthalene 4.8 2.1On-site SB-18-0' 0.0 Lead 268 80On-site SB-18-0' 0.0 Naphthalene 11 2.1On-site SB-18-0' 0.0 Benzo(a)pyrene Equivalent 57 0.9On-site SB-18-16' 16.0 Benzo(a)pyrene Equivalent 0.99 0.9On-site SB-19-21' 21.0 Naphthalene 4.8 2.1On-site SB-19-21' 21.0 Ethylbenzene 7.5 5.8On-site SB-20-0' 0.0 Lead 91 80On-site SB-20-0' 0.0 Benzo(a)pyrene Equivalent 5.3 0.9On-site SB-21-5' 5.0 Benzo(a)pyrene Equivalent 1.4 0.9On-site SB-22-0' 0.0 Lead 323 80On-site SB-22-0' 0.0 Naphthalene 16 2.1On-site SB-22-0' 0.0 Benzo(a)pyrene Equivalent 19 0.9On-site SB-22-5' 5.0 Benzo(a)pyrene Equivalent 2.6 0.9On-site SB-23-0' 0.0 Lead 1340 80On-site SB-23-0' 0.0 Naphthalene 3.4 2.1On-site SB-23-0' 0.0 Benzo(a)pyrene Equivalent 26 0.9On-site SB-23-12' 12.0 Lead 1100 80On-site SB-23-12' 12.0 Naphthalene 3.3 2.1On-site SB-23-12' 12.0 Benzo(a)pyrene Equivalent 24 0.9On-site SB-25-0' 0.0 Lead 180 80On-site SB-25-0' 0.0 Naphthalene 24 2.1On-site SB-25-0' 0.0 Benzo(a)pyrene Equivalent 62 0.9On-site SB-34-0' 0.0 Lead 207 80On-site SB-34-0' 0.0 Naphthalene 3.6 2.1On-site SB-34-0' 0.0 Benzo(a)pyrene Equivalent 19 0.9On-site SB-48-1.5' 1.5 Naphthalene 9.6 2.1On-site SB-48-1.5' 1.5 Benzo(a)pyrene Equivalent 91 0.9On-site SB-48-3' 3.0 Benzo(a)pyrene Equivalent 7.6 0.9On-site SB-49-3' 3.0 Naphthalene 4.9 2.1On-site SB-49-3' 3.0 Benzo(a)pyrene Equivalent 18 0.9On-site SB-49-4' 4.0 Lead 86 80On-site SB-49-4' 4.0 2-Methylnaphthalene 1000 203On-site SB-49-4' 4.0 Acenaphthylene 4100 3270On-site SB-49-4' 4.0 Benzo(g,h,i)Perylene 3400 1635On-site SB-49-4' 4.0 Fluoranthene 9800 2180On-site SB-49-4' 4.0 Naphthalene 23000 2.1On-site SB-49-4' 4.0 Pyrene 10000 1635On-site SB-49-4' 4.0 Benzo(a)pyrene Equivalent 4998 0.9On-site SB-49-4' 4.0 Benzene 0.81 0.51
Lodi_HRA_Tables Page 2 of 4 IRIS ENVIRONMENTAL
Area Sample NameSample Depth
(feet bgs)Chemical Concentration
(mg/kg)
Risk-Based or Ambient-Based
Screening Concentration
TABLE 26SUMMARY OF SAMPLES WITH CHEMICALS ABOVE
RISK-BASED OR AMBIENT-BASED SCREENING CONCENTRATIONSFormer Lodi Manufactured Gas Plant
Lodi, California
On-site SB-50-1.5' 1.5 Benzo(a)pyrene Equivalent 44 0.9On-site SB-51-1.5' 1.5 Benzo(a)pyrene Equivalent 2.4 0.9On-site SB-51-6.5' 6.5 Benzo(g,h,i)Perylene 11000 1635On-site SB-51-6.5' 6.5 Fluoranthene 20000 2180On-site SB-51-6.5' 6.5 Pyrene 21000 1635On-site SB-51-6.5' 6.5 Benzo(a)pyrene Equivalent 9824 0.9On-site SB-56-0.5' 0.5 Lead 346 80On-site SB-56-0.5' 0.5 Benzo(a)pyrene Equivalent 36 0.9On-site SS-2 0.0 Lead 24800 80On-site SS-2 0.0 Benzo(a)pyrene Equivalent 7.5 0.9On-site SS-3 0.0 Lead 451 80On-site SS-3 0.0 Thallium 7.8 5.0On-site SS-3 0.0 Naphthalene 5.0 2.1On-site SS-3 0.0 Benzo(a)pyrene Equivalent 170 0.9On-site SS-4 0.0 Lead 691 80On-site SS-4 0.0 Naphthalene 5.1 2.1On-site SS-4 0.0 Benzo(a)pyrene Equivalent 23 0.9On-site SS-5 0.0 Lead 147 80On-site SS-5 0.0 Benzo(a)pyrene Equivalent 1.1 0.9On-site SS-7 0.0 Antimony 50 30On-site SS-7 0.0 Lead 1400 80On-site SS-7 0.0 Naphthalene 15 2.1On-site SS-7 0.0 Benzo(a)pyrene Equivalent 87 0.9On-site SS-8 0.0 Lead 2320 80On-site SS-8 0.0 Naphthalene 3.3 2.1On-site SS-8 0.0 Benzo(a)pyrene Equivalent 43 0.9On-site SS-9 0.0 Lead 165 80On-site SS-9 0.0 Benzo(a)pyrene Equivalent 9.8 0.9On-site SS-10 0.0 Lead 599 80On-site TP-1-0.5' 0.5 Lead 108 80On-site TP-2-0.5' 0.5 Lead 200 80On-site TP-2-0.5' 0.5 Benzo(a)pyrene Equivalent 1.3 0.9On-site TP-2-6' 6.0 Benzo(a)pyrene Equivalent 6.8 0.9On-site TP-3-0.5' 0.5 Lead 347 80On-site TP-3-0.5' 0.5 Benzo(a)pyrene Equivalent 28 0.9On-site TP-5-0.5' 0.5 Lead 93 80On-site TP-6-0.5' 0.5 Lead 701 80On-site TP-6-0.5' 0.5 Benzo(a)pyrene Equivalent 2.8 0.9On-site TP-7-25D 2.7 Benzo(a)pyrene Equivalent 1.6 0.9On-site TP-7-25S 1.2 Lead 259 80On-site TP-7-25S 1.2 Benzo(a)pyrene Equivalent 2.8 0.9On-site TP-8-0.5' 0.5 Lead 250 80On-site TP-8-0.5' 0.5 Naphthalene 3.8 2.1On-site TP-8-0.5' 0.5 Benzo(a)pyrene Equivalent 46 0.9On-site TP-9-0.5' 0.5 Lead 168 80On-site TP-9-0.5' 0.5 Benzo(a)pyrene Equivalent 54 0.9On-site TP-9-3' 3.0 Benzo(a)pyrene Equivalent 3.2 0.9
Lodi_HRA_Tables Page 3 of 4 IRIS ENVIRONMENTAL
Area Sample NameSample Depth
(feet bgs)Chemical Concentration
(mg/kg)
Risk-Based or Ambient-Based
Screening Concentration
TABLE 26SUMMARY OF SAMPLES WITH CHEMICALS ABOVE
RISK-BASED OR AMBIENT-BASED SCREENING CONCENTRATIONSFormer Lodi Manufactured Gas Plant
Lodi, California
On-site TP-10-3' 3.0 Benzo(a)pyrene Equivalent 1.7 0.9On-site TP-11-0.5' 0.5 Naphthalene 5.8 2.1On-site TP-11-0.5' 0.5 Benzo(a)pyrene Equivalent 89 0.9On-site TP-11-3' 3.0 Benzo(a)pyrene Equivalent 31 0.9On-site TP-11-6' 6.0 Benzo(a)pyrene Equivalent 1.9 0.9On-site TP-11-9' 9.0 Benzo(a)pyrene Equivalent 4.9 0.9Off-site ROW SB-4-0' 0.0 Benzo(a)pyrene Equivalent 0.96 0.9Off-site ROW SB-4-7' 7.0 Lead 783 80Off-site ROW SB-4-7' 7.0 Benzo(a)pyrene Equivalent 3.8 0.9Off-site ROW SB-11-0' 0.0 Lead 101 80Off-site ROW SB-11-0' 0.0 Benzo(a)pyrene Equivalent 1.5 0.9Off-site ROW SB-12-0' 0.0 Lead 99 80Off-site ROW SB-12-0' 0.0 Benzo(a)pyrene Equivalent 1.3 0.9Off-site ROW SB-12-3' 3.0 Lead 383 80Off-site ROW SB-12-3' 3.0 Naphthalene 6.8 2.1Off-site ROW SB-12-3' 3.0 Benzo(a)pyrene Equivalent 36 0.9Off-site ROW SB-12-6' 6.0 Naphthalene 2.6 2.1Off-site ROW SB-12-6' 6.0 Benzo(a)pyrene Equivalent 8.4 0.9Off-site ROW SB-27-0.5' 0.5 Benzo(a)pyrene Equivalent 1.9 0.9Off-site ROW SB-33-0.5' 0.5 Lead 81 80Off-site ROW SB-33-0.5' 0.5 Naphthalene 49 2.1Off-site ROW SB-33-0.5' 0.5 Benzo(a)pyrene Equivalent 153 0.9Off-site ROW SB-47-0.5' 0.5 Lead 222 80Off-site ROW SB-47-0.5' 0.5 Benzo(a)pyrene Equivalent 25 0.9LIW SB-35-0' 0.0 Lead 129 80LIW SB-35-0' 0.0 Benzo(a)pyrene Equivalent 10 0.9LIW SB-37-0' 0.0 Naphthalene 5.8 2.1LIW SB-37-3' 3.0 Benzo(a)pyrene Equivalent 3.3 0.9LIW SB-38-0' 0.0 Naphthalene 5.0 2.1LIW SB-38-0' 0.0 Benzo(a)pyrene Equivalent 1.8 0.9LIW SB-39-0' 0.0 Naphthalene 2.2 2.1LIW SB-40-3' 3.0 Lead 250 80LIW SB-43-0' 0.0 Lead 100 80LIW SB-43-0' 0.0 Benzo(a)pyrene Equivalent 5.3 0.9LIW SB-44-0' 0.0 Nickel 4330 1471LIW SB-45-0' 0.0 Naphthalene 6.9 2.1
Notes:mg/kg = milligrams per kilogramLIW = Lodi Iron Works PropertyROW = right-of-way
Samples and chemicals SHADED IN GREY are not collocated with carcinogenic polycyclic aromatic hydrocarbons (CPAH; expressed as benzo(a)pyrene equivalents) concentrations exceeding the ambient-based screening concentration (ABSC) of 0.9 mg/kg.
Samples and chemicals in BOLDED FONT are representative of soils greater than 10 feet below ground surface (bgs).
Lodi_HRA_Tables Page 4 of 4 IRIS ENVIRONMENTAL
FINAL Human Health Risk Assessment June 2011 Former Lodi Manufactured Gas Plant Site
IRIS ENVIRONMENTAL
FIGURES
PRIMARY SOURCE PRIMARY RELEASE MECHANISM
POTENTIAL SECONDARY
SOURCES
SECONDARY RELEASE
MECHANISMS
EXPOSURE MEDIA
EXPOSURE ROUTE
Current Off-site
Commercial Workers
Current Off-site
Residents
Future On-site
Residents
Ingestion •Dermal Contact •
Ingestion •Dermal Contact •
Inhalation • • •Legend:
• for further quantitative evaluation in HRA
Inhalation •
IngestionDermal Contact
File Name: I:PG&E\Lodi\HRA\Figures\Figure 3_CSM_Lodi_rev.xls
Former Lodi Manufactured Gas Plant Site Lodi, California
Drafter: SS Date: 6/23/11 Contract Number: 10-718-A
Surface Soil
Spills/LeaksOnsite Handling/
Movement
Surface Soil
Subsurface SoilSubsurface Soil
Ambient Air
Volatilization and Atmospheric Dispersion
Wind Erosion and Atmospheric Dispersion
= Potentially complete exposure pathway
Volatilization and Enclosed Space Accumulation
Figure
Indoor Air
Former MGP Operations • Crude Oil Storage • Lampblack Pits • Gas Holders
3
Ground Water
IRIS ENVIRONMENTAL1438 Webster St., Suite 302, Oakland, California 94612
Conceptual Site Model
Storm Water/ Surface Water
Runoff b
Leaching and Groundwater Transport a
a On-site soil and groundwater data indicate that constituents detected in groundwater to appear to be unrelated to historical site operations. Although migration of constituents from the subsurface soils down into the groundwater is currently considered incomplete based on existing Site data, the potential future migration of constituents from the subsurface soils down into the groundwater will be addressed in the FS/RAW.
b The Site is essentially flat and mostly unpaved. Swales are in place over sections of the Site, but are in poor shape. Most precipitation will likely percolate into the soils, minimizing the potential for surface runoff. Thus, the surface water runoff pathway is considered incomplete under current conditions and is not evaluated in the HRA.
X
FINAL Human Health Risk Assessment June 2011 Former Lodi Manufactured Gas Plant Site
IRIS ENVIRONMENTAL
ATTACHMENT A
SITE INVESTIGATION DATA INCLUDED IN HRA
FINAL Human Health Risk Assessment June 2011 Former Lodi Manufactured Gas Plant Site
A-1 IRIS ENVIRONMENTAL
ATTACHMENT A SITE INVESTIGATION DATA INCLUDED IN THE HRA
As discussed in Section 3.1 of the human health risk assessment (HRA) for the Former Lodi Manufactured Gas Plant Site (the “Site”), all data collected on-site and off-site during previous Site investigations were evaluated for use in the HRA. All soil and soil gas data collected during the 2006 Surface Soil Sampling, the 2008 and 2009 Remedial Investigation, and the 2010 Remedial Refinement Investigation were evaluated for inclusion in the HRA. For purposes of remedial decision-making, the boundary of ‘Site’ will include:
• street to the west of the Site (South Sacramento Street), and • 30-foot strip on LIW property directly south of Site.
As such, all data collected off-site in South Sacramento Street and on LIW property are included in the dataset used in the quantitative HRA. Soil and soil gas samples included in the HRA are summarized in Tables A-1 through A-5. Included in Table A-2 of this attachment is the summary of analytical data for individual PAHs as well as expressed in benzo(a)pyrene equivalent for the carcinogenic PAH results.
FINAL Human Health Risk Assessment June 2011 Former Lodi Manufactured Gas Plant Site
IRIS ENVIRONMENTAL
ATTACHMENT A TABLES
TABLE A-1ANALYTICAL DATA INCLUDED IN THE HRA - SOILS (0-10 FEET BGS)
INORGANICSFormer Lodi Manufactured Gas Plant
Lodi, CaliforniaL
ocat
ion
Sam
ple
ID
Dep
th (f
eet b
gs)
Sam
ple
Dat
e
Ant
imon
y
Ars
enic
Bar
ium
Ber
ylliu
m
Cad
miu
m
Chr
omiu
m
Cob
alt
Cop
per
Lea
d
Mer
cury
Mol
ybde
num
Nic
kel
Sele
nium
Silv
er
Tha
llium
Van
adiu
m
Zin
c
Cya
nide
, Tot
al
Am
mon
ia (a
s N)
Background PS-1-0' 0 11/13/2008 0.75 U 2.55 99.4 0.25 U 0.5 U 11.4 4.8 12.9 13.5 0.117 0.251 6.52 0.75 U 0.406 0.75 U 25.1 64.8 -- --Background PS-1-2' 2 11/13/2008 0.75 U 1.88 86.9 0.262 0.5 U 6.79 5.45 6.75 2.79 0.0835 U 0.25 U 5.38 0.75 U 0.25 U 0.75 U 24.8 25.9 -- --Background PS-2-0' 0 11/13/2008 0.75 U 3.06 118 0.25 U 0.638 12.4 4.7 14.7 16.2 0.129 0.25 U 7.02 0.774 0.324 0.75 U 26 73.3 -- --Background PS-2-2' 2 11/13/2008 0.75 U 4.17 112 0.369 0.5 U 9.05 7.26 8.35 3.39 0.0835 U 0.25 U 6.47 0.825 0.25 U 0.75 U 36.6 34.8 -- --Background PS-3-0' 0 11/13/2008 0.75 U 3.71 92 0.25 U 0.505 10.2 3.68 12.1 18.2 0.144 0.25 U 5.34 0.75 U 0.418 0.75 U 20.7 57.2 -- --Background PS-3-2' 2 11/13/2008 0.75 U 2.93 113 0.362 0.5 U 8.33 7.32 8.6 3.24 0.0835 U 0.25 U 6.55 0.75 U 0.25 U 0.75 U 34 33.6 -- --Background PS-4-0' 0 11/13/2008 0.75 U 1.39 109 0.25 U 0.5 U 10.2 4.04 13.2 22.6 0.0883 0.25 U 7.67 0.75 U 0.272 0.75 U 21.4 76.3 -- --Background PS-4-2' 2 11/13/2008 0.75 U 1.58 118 0.25 U 0.5 U 6.28 4.82 8.11 4.52 0.0835 U 0.25 U 5.16 0.75 U 0.25 U 0.75 U 21 44.3 -- --Background PS-5-0' 0 11/13/2008 0.75 U 1.99 102 0.25 U 0.5 U 10.6 4.84 12.5 21.6 0.0858 0.25 U 7.85 0.75 U 0.25 U 0.75 U 25.6 56.2 -- --Background PS-5-2' 2 11/13/2008 0.75 U 1.52 100 0.302 0.5 U 8.74 6.35 8.7 4.7 0.0835 U 0.25 U 6.78 0.75 U 0.25 U 0.75 U 28.2 32.2 -- --Background PS-6-0' 0 11/13/2008 0.75 U 1.94 97.3 0.253 0.5 U 10.1 4.81 10.9 20.2 0.0835 U 0.25 U 7.7 0.798 0.25 U 0.75 U 25.6 48.1 -- --Background PS-6-2' 2 11/13/2008 0.75 U 1.27 85.17 0.289 0.5 U 7.95 5.67 7.52 3.35 0.0835 U 0.25 U 6.11 0.75 U 0.25 U 0.75 U 25.9 26.5 -- --
On-site AK-1-30" 2.5 7/15/2010 0.75 U 0.795 84.4 0.25 U 0.5 U 6.06 5.81 7.05 39.6 0.0835 U 0.25 U 6.53 0.75 U 0.25 U 0.75 U 22.3 36.8 -- --On-site AK-1-38" 3.17 7/15/2010 0.75 U 0.956 83.1 0.25 U 0.5 U 6.65 6.31 7.5 24.4 0.0835 U 0.25 U 7.77 0.75 U 0.25 U 0.75 U 23.9 106 -- --On-site AK-2-20" 1.7 7/15/2010 0.75 U 0.75 U 95.3 0.25 U 0.5 U 5.99 6.23 7.03 31.7 0.0835 U 0.25 U 4.76 0.75 U 0.25 U 0.75 U 21.8 62 -- --On-site AK-2-34" 2.83 7/15/2010 0.75 U 0.926 62.9 0.25 U 0.5 U 6.04 4.91 5.59 6.69 0.0835 U 0.25 U 3.75 0.75 U 0.25 U 0.75 U 23.2 20.7 -- --On-site AK-3-17" 1.42 7/15/2010 0.75 U 1.23 81 0.25 U 0.553 6.79 5.19 6.58 2.77 0.0835 U 0.25 U 4.66 0.75 U 0.25 U 0.75 U 24.9 334 -- --On-site SB-1-0' 0 10/15/2008 0.75 U 2.18 84.5 0.25 U 0.5 U 10.5 4.49 9.18 39.3 0.0835 U 0.25 U 4.58 0.75 U 0.25 U 0.75 U 22.2 384 0.5 U --On-site SB-1-3' 3 10/15/2008 0.75 U 0.75 U 75.4 0.268 0.5 U 6.26 5.12 6.49 5.55 0.0835 U 0.25 U 4.19 0.75 U 0.25 U 0.75 U 23.1 24.6 0.5 U --On-site SB-1-6' 6 10/15/2008 0.75 U 0.75 U 57.1 0.25 U 0.5 U 4.86 4.51 4.81 1.93 0.0835 U 0.25 U 3.48 0.75 U 0.25 U 0.75 U 20.7 19.9 0.5 U --On-site SB-1-9' 9 10/15/2008 0.75 U 6.03 96.3 0.424 0.5 U 8.33 9.19 9.49 3.56 0.0835 U 0.25 U 7.38 0.75 U 0.25 U 0.75 U 48.3 36.8 0.5 U --On-site SB-2-0' 0 10/15/2008 0.75 U 0.75 U 103 0.267 0.5 U 6.16 5.53 7.07 2.64 0.0835 U 0.25 U 4.6 0.75 U 0.25 U 0.75 U 23.6 25.9 0.5 U --On-site SB-2-0' (DUP-6) 0 10/15/2008 0.75 U 0.807 109 0.268 0.5 U 6.01 5.85 7.63 2.76 0.0835 U 0.25 U 4.57 0.75 U 0.25 U 0.75 U 22.9 27.4 0.5 U --On-site SB-2-3' 3 10/15/2008 0.75 U 1.19 85.3 0.3 0.5 U 7.11 5.16 7.15 2.22 0.0835 U 0.25 U 5.17 0.75 U 0.25 U 0.75 U 26.5 29.9 0.5 U --On-site SB-2-6' 6 10/15/2008 0.75 U 0.904 55.6 0.25 U 0.5 U 5.87 4.18 6.5 1.82 0.0835 U 0.25 U 3.72 0.75 U 0.25 U 0.75 U 22.7 24.6 0.5 U --On-site SB-2-9' 9 10/15/2008 0.75 U 1.97 76.2 0.263 0.5 U 6.58 4.93 6.97 1.79 0.0835 U 0.25 U 7.05 0.75 U 0.25 U 0.75 U 26.8 23.8 0.5 U --On-site SB-5-0' 0 10/15/2008 14.7 5.36 126 0.504 0.738 10.2 6.71 20.2 1100 0.14 0.25 U 51.1 0.75 U 0.25 U 0.75 U 54.9 191 5.2 --On-site SB-5-6' 6 10/15/2008 0.75 U 1.83 69.2 0.321 0.5 U 7.11 5.38 6.99 2.24 0.0835 U 0.25 U 5.61 0.75 U 0.25 U 0.75 U 32 33.9 0.5 U --On-site SB-5-9' 9 10/15/2008 0.75 U 1.39 96.7 0.287 0.5 U 7.19 6.25 8.06 2.72 0.0835 U 0.25 U 4.96 0.75 U 0.25 U 0.75 U 28.2 44 0.5 U --On-site SB-6-7.5' 7.5 10/14/2008 0.75 U 0.858 49.9 0.41 0.602 5.02 6.62 30.3 12.2 0.0835 U 0.625 194 0.75 U 0.25 U 0.75 U 103 54.6 2.7 --On-site SB-6-9.5' 9.5 10/14/2008 0.75 U 0.75 U 38.4 0.25 U 0.5 U 1.54 0.618 2.22 26.6 0.0835 U 0.25 U 18.6 0.75 U 0.25 U 0.75 U 16.3 20.8 6.2 --On-site SB-7-0' 0 10/15/2008 0.765 2.37 119 0.25 U 0.5 U 7.08 3.57 25.9 988 0.146 0.25 U 14.3 0.75 U 0.25 U 0.75 U 28.3 121 2 --On-site SB-7-3' 3 10/15/2008 0.75 U 1.91 92.4 0.361 0.5 U 8.47 6.26 8.32 31.9 0.0835 U 0.25 U 6.62 0.75 U 0.25 U 0.75 U 32 43.5 0.5 U --On-site SB-7-6' 6 10/15/2008 0.75 U 1.99 116 0.309 0.5 U 13.1 7.36 13.5 227 0.0835 U 0.25 U 9.52 0.75 U 0.25 U 0.75 U 34.4 72.9 0.5 U --On-site SB-7-6' (DUP-4) 6 10/15/2008 0.75 U 2.33 93.7 0.394 0.5 U 8.92 15.8 8.87 26.5 0.0835 U 0.25 U 8.39 0.75 U 0.25 U 0.75 U 33.6 54.8 0.5 U --On-site SB-7-9' 9 10/15/2008 0.75 U 6.79 148 0.412 0.5 U 7.77 10.6 11.6 4.14 0.0835 U 0.25 U 9.09 0.75 U 0.25 U 0.75 U 51.5 45.4 0.5 U --On-site SB-8-0' 0 10/15/2008 0.75 U 0.75 U 67.2 0.25 U 0.5 U 5.47 3.39 5.44 3.3 0.0835 U 0.25 U 3.94 0.75 U 0.25 U 0.75 U 18.1 24 0.5 U --On-site SB-8-3' 3 10/15/2008 0.75 U 0.75 U 82.9 0.25 U 0.5 U 5.92 8.3 10.5 3.99 0.0835 U 0.25 U 4.62 0.75 U 0.396 0.75 U 19.4 22.7 0.5 U --On-site SB-8-5.5' 5.5 10/15/2008 4.81 5.66 84.9 0.25 U 2.23 8 6.6 53 97.3 0.0835 U 1.06 58.3 0.75 U 0.25 U 0.75 U 24.8 574 13 --On-site SB-8-6' 6 10/15/2008 0.75 U 0.75 U 97.7 0.25 U 0.5 U 7.3 5.12 4.4 2.54 0.0835 U 0.25 U 5.07 0.75 U 0.25 U 0.75 U 37.4 72.6 1 --On-site SB-8-9' 9 10/15/2008 0.75 U 5.43 119 0.665 0.5 U 17.6 7.94 11 5.6 0.0835 U 0.25 U 11.5 0.75 U 0.25 U 0.75 U 50.3 38.4 0.5 U --On-site SB-9-0' 0 10/13/2008 2 3.49 107 0.317 0.542 11.2 6.43 20.3 153 0.0835 U 0.25 U 14.4 0.75 U 0.25 U 0.75 U 33.7 119 0.5 U --On-site SB-9-3' 3 10/13/2008 0.75 U 1.97 116 0.343 0.5 U 7.25 6.48 8.64 13.1 0.0835 U 0.25 U 5.67 0.75 U 0.25 U 0.75 U 30.6 39.1 0.5 U --
Att_A_Tables_Lodi Page 1 of 7 IRIS ENVIROMENTAL
TABLE A-1ANALYTICAL DATA INCLUDED IN THE HRA - SOILS (0-10 FEET BGS)
INORGANICSFormer Lodi Manufactured Gas Plant
Lodi, CaliforniaL
ocat
ion
Sam
ple
ID
Dep
th (f
eet b
gs)
Sam
ple
Dat
e
Ant
imon
y
Ars
enic
Bar
ium
Ber
ylliu
m
Cad
miu
m
Chr
omiu
m
Cob
alt
Cop
per
Lea
d
Mer
cury
Mol
ybde
num
Nic
kel
Sele
nium
Silv
er
Tha
llium
Van
adiu
m
Zin
c
Cya
nide
, Tot
al
Am
mon
ia (a
s N)
On-site SB-9-3' (DUP-1) 3 10/13/2008 0.75 U 1.8 106 0.376 0.5 U 7.53 7.18 8.66 4.26 0.0835 U 0.25 U 5.64 0.75 U 0.25 U 0.75 U 32.7 33.6 0.5 U --On-site SB-9-6' 6 10/13/2008 0.75 U 1.93 107 0.33 0.5 U 7.41 6.51 8.87 6.93 0.0835 U 0.25 U 5.61 0.75 U 0.25 U 0.75 U 32.8 37 0.5 U --On-site SB-9-9' 9 10/13/2008 0.75 U 1.23 55.8 0.25 U 0.5 U 3.91 4.07 5.67 2.36 0.0835 U 0.25 U 2.95 0.75 U 0.25 U 0.75 U 20.7 20.2 0.5 U --On-site SB-9-9' (DUP-2) 9 10/13/2008 0.75 U 2.29 135 0.394 3.35 9.32 7.46 10.6 3.79 0.0835 U 0.25 U 16.8 0.75 U 0.25 U 0.75 U 38.4 49.4 0.5 U --On-site SB-10-1.5' 1.5 10/15/2008 0.75 U 1.21 88.3 0.25 U 0.5 U 3.71 139 123 56.6 0.0835 U 0.25 U 12.3 0.75 U 3.57 0.75 U 13.7 46.4 0.5 U --On-site SB-10-3' 3 10/15/2008 0.75 U 1.03 87 0.309 0.5 U 6.56 16.7 17 9.4 0.0835 U 0.25 U 5.28 0.75 U 0.25 U 0.75 U 27.6 27.2 0.5 U --On-site SB-10-3' (DUP-5) 3 10/15/2008 0.75 U 0.816 91.4 0.3 0.5 U 6.45 7.3 9.06 4.57 0.0835 U 0.25 U 4.9 0.75 U 0.25 U 0.75 U 28.4 27.5 0.5 U --On-site SB-10-6' 6 10/15/2008 0.75 U 1.15 87 0.282 0.5 U 6.67 7.29 7.26 2.79 0.0835 U 0.25 U 4.48 0.75 U 0.25 U 0.75 U 30.8 25.2 0.5 U --On-site SB-10-9' 9 10/15/2008 0.75 U 4.92 109 0.372 0.5 U 8.43 8.56 11.6 3.42 0.0835 U 0.25 U 6.53 0.75 U 0.25 U 0.75 U 44.4 41 0.5 U --On-site SB-13-0' 0 10/13/2008 2.4 3.61 146 0.25 U 0.5 U 6.37 3.22 16.5 386 0.389 0.25 U 9.31 0.75 U 0.25 U 0.75 U 25.4 102 3.1 --On-site SB-13-3' 3 10/13/2008 0.75 U 1.75 109 0.25 U 0.5 U 7.04 4.45 9.84 116 0.0835 U 0.25 U 5.31 0.75 U 0.25 U 0.75 U 25.6 51.7 11 --On-site SB-13-6' 6 10/13/2008 0.75 U 1.55 87.4 0.25 U 0.5 U 5.86 3.25 10.1 46.6 0.0835 U 0.25 U 10.4 0.75 U 0.25 U 0.75 U 31.7 41.4 0.5 U --On-site SB-13-9' 9 10/13/2008 0.75 U 2.42 95.8 0.302 0.5 U 9.47 9.04 9.61 3.36 0.0835 U 0.25 U 7.09 0.75 U 0.25 U 0.75 U 29.4 30.1 0.5 U --On-site SB-14-0' 0 10/13/2008 0.75 U 3.07 137 0.324 0.713 10.9 7.02 27 145 0.0835 U 0.25 U 15.7 0.75 U 0.25 U 0.75 U 27.9 122 4.2 --On-site SB-14-2' 2 10/13/2008 0.75 U 2.3 96.2 0.25 U 0.5 U 7.64 3.95 23.2 143 0.0835 U 0.25 U 12.3 0.75 U 0.25 U 0.75 U 23.8 61.3 7.7 --On-site SB-14-3' 3 10/13/2008 0.75 U 2.26 123 0.379 0.5 U 8.39 7.32 11.9 37.9 0.0835 U 0.25 U 9.01 0.75 U 0.25 U 0.75 U 32.6 51.1 0.5 U --On-site SB-14-6' 6 10/13/2008 0.75 U 2.26 104 0.318 0.5 U 6.9 7.06 8.13 10.1 0.0835 U 0.25 U 5.79 0.75 U 0.25 U 0.75 U 32 31.7 0.5 U --On-site SB-14-9' 9 10/13/2008 0.75 U 2.21 45.6 0.261 0.5 U 8.59 4.54 8.4 2.58 0.0835 U 0.25 U 7.51 0.75 U 0.25 U 0.75 U 24.8 21.5 0.5 U --On-site SB-15-0' 0 10/13/2008 0.75 U 2.31 106 0.266 0.5 U 8.86 5.49 20 261 0.0835 U 0.25 U 14.2 0.75 U 0.25 U 0.75 U 25.3 106 0.5 U --On-site SB-15-3' 3 10/13/2008 0.75 U 2.07 104 0.297 0.5 U 8.24 5.49 13 55.3 0.0835 U 0.25 U 8.14 0.75 U 0.25 U 0.75 U 26.5 50.1 0.5 U --On-site SB-15-6' 6 10/13/2008 0.75 U 2.63 124 0.445 0.5 U 8.6 7.98 10.7 27.3 0.0835 U 0.25 U 8.08 0.75 U 0.25 U 0.75 U 37.7 45.3 0.5 U --On-site SB-15-9' 9 10/13/2008 0.75 U 0.935 35.2 0.25 U 0.5 U 2.43 2.53 3.29 1.09 0.0835 U 0.25 U 2.06 0.75 U 0.25 U 0.75 U 11.5 12.7 0.5 U --On-site SB-16-1' 1 10/13/2008 0.75 U 2.31 267 0.261 0.5 U 9.27 4.26 49.9 371 0.0835 U 0.25 U 8.64 0.75 U 0.25 U 0.75 U 26.6 73 0.61 --On-site SB-16-3' 3 10/13/2008 0.75 U 0.923 61.8 0.25 U 0.5 U 4.57 3.63 6.6 32 0.0835 U 0.25 U 3.62 0.75 U 0.25 U 0.75 U 16.1 21.4 0.5 U --On-site SB-16-6' 6 10/13/2008 0.75 U 2.63 131 0.369 0.5 U 8.23 6.94 8.67 4.87 0.0835 U 0.25 U 6.56 0.75 U 0.25 U 0.75 U 36.9 35 0.5 U --On-site SB-16-9' 9 10/13/2008 0.75 U 4.1 95.8 0.306 0.5 U 6.03 7.76 8.49 3.14 0.0835 U 0.25 U 5.09 0.75 U 0.25 U 0.75 U 37 39.6 0.5 U --On-site SB-17-1' 1 11/5/2009 0.75 U 5.04 91.1 0.25 U 0.5 U 10.5 4.62 19 863 0.0835 U 0.25 U 16.4 0.75 U 0.25 U 0.75 U 38.8 62.1 9.3 --On-site SB-18-0' 0 11/4/2009 0.75 U 2.8 91 0.25 U 0.5 U 2.74 1.53 55.6 268 0.144 0.988 8.7 0.75 U 0.473 0.75 U 8.44 30.4 13 --On-site SB-18-8' 8 11/4/2009 0.75 U 3.54 153 0.271 0.5 U 11 9.19 8.86 3.42 0.0133 J 0.25 U 9.52 0.75 U 0.25 U 0.75 U 40.7 47.8 0.5 U --On-site SB-19-5' 5 11/5/2009 0.75 U 2.68 96.5 0.25 U 0.5 U 7.1 9.37 5.5 1.99 0.0835 U 0.25 U 6.78 0.75 U 0.25 U 0.75 U 32.3 41.4 0.5 U --On-site SB-20-0' 0 11/4/2009 0.75 U 2.9 131 0.25 U 0.5 U 8.78 5.91 19.9 90.6 0.107 0.25 U 10.6 0.75 U 0.25 U 0.75 U 32.3 66.1 0.97 --On-site SB-21-0' 0 11/3/2009 0.75 U 8.46 110 0.183 J 0.173 J 10.2 6.2 20.5 77.8 0.0284 J 0.25 U 10.1 0.75 U 0.25 U 0.75 U 23.8 168 -- --On-site SB-21-5' 5 11/2/2009 0.75 U 2.85 87.6 0.157 J 0.5 U 6.73 6.29 5.68 1.93 0.0412 J 0.25 U 4.6 0.75 U 0.25 U 0.75 U 29.4 35.2 -- --On-site SB-21-10' 10 11/2/2009 0.75 U 4.54 99.4 0.213 J 0.5 U 7.59 7.23 6.92 2.86 0.00895 J 0.1 J 5.28 0.75 U 0.25 U 0.75 U 33.5 45.8 -- --On-site SB-22-0' 0 11/2/2009 0.75 U 2.88 146 0.226 J 0.5 U 8.23 6.82 12.1 323 0.0332 J 0.25 U 8.05 0.75 U 0.25 U 0.75 U 29.6 73.1 -- --On-site SB-22-5' 5 11/2/2009 0.75 U 2.7 92.1 0.164 J 0.5 U 7.19 6.62 5.64 2.27 0.00795 J 0.25 U 4.82 0.75 U 0.25 U 0.75 U 30.8 38.9 -- --On-site SB-22-10' 10 11/2/2009 0.75 U 6.09 210 0.33 0.5 U 13.6 11.5 11.6 4.5 0.0125 J 0.25 U 11.9 0.75 U 0.25 U 0.75 U 44.7 76 -- --On-site SB-23-0' 0 11/2/2009 0.75 U 7.16 145 0.159 0.5 U 13.7 5.15 91.5 1340 2.77 0.153 J 60 0.75 U 0.25 U 0.75 U 100 92.4 -- --On-site SB-23-10' 10 11/2/2009 0.75 U 4.48 74.9 0.223 J 0.5 U 9.9 4.23 5.04 2.51 0.00635 J 0.25 U 8.26 0.75 U 0.25 U 0.75 U 30.5 51.4 -- --On-site SB-24-0' 0 11/2/2009 0.75 U 2.45 82.3 0.201 J 0.5 U 12.4 6.79 11.3 12.3 0.00925 J 0.25 U 11.5 0.75 U 0.25 U 0.75 U 29.1 51.3 -- --On-site SB-24-5' 5 11/2/2009 0.75 U 3.59 139 0.249 J 0.5 U 9.82 8.89 9.2 3.2 0.00735 J 0.25 U 6.98 0.75 U 0.25 U 0.75 U 42.7 48.9 -- --On-site SB-24-10' 10 11/2/2009 0.75 U 5.73 99 0.256 0.5 U 12.3 6.58 8.56 3.93 0.0175 J 0.252 9.9 0.75 U 0.25 U 0.75 U 38.2 40.7 -- --On-site SB-25-0' 0 11/2/2009 0.75 U 4.56 114 0.184 J 0.5 U 9.76 5.93 24.5 180 0.0399 0.25 U 13.2 0.75 U 0.25 U 0.75 U 29 121 -- --
Att_A_Tables_Lodi Page 2 of 7 IRIS ENVIROMENTAL
TABLE A-1ANALYTICAL DATA INCLUDED IN THE HRA - SOILS (0-10 FEET BGS)
INORGANICSFormer Lodi Manufactured Gas Plant
Lodi, CaliforniaL
ocat
ion
Sam
ple
ID
Dep
th (f
eet b
gs)
Sam
ple
Dat
e
Ant
imon
y
Ars
enic
Bar
ium
Ber
ylliu
m
Cad
miu
m
Chr
omiu
m
Cob
alt
Cop
per
Lea
d
Mer
cury
Mol
ybde
num
Nic
kel
Sele
nium
Silv
er
Tha
llium
Van
adiu
m
Zin
c
Cya
nide
, Tot
al
Am
mon
ia (a
s N)
On-site SB-25-5' 5 11/2/2009 0.75 U 3.72 193 0.258 0.5 U 9.1 7.72 8.02 2.9 0.00967 J 0.25 U 6.63 0.75 U 0.25 U 0.75 U 42.6 49.2 -- --On-site SB-25-10' 10 11/2/2009 0.75 U 2.53 67 0.105 0.5 U 4.25 3.62 5.96 1.64 0.00835 J 0.25 U 3.23 0.75 U 0.25 U 0.75 U 20.9 34.1 -- --On-site SB-34-0' 0 11/3/2009 0.75 U 4.51 112 0.172 J 0.5 U 12.1 5.54 17.8 207 0.0436 J 0.103 J 14.6 0.75 U 0.25 U 0.75 U 27.2 115 -- --On-site SB-34-8' 8 11/3/2009 0.75 U 2.87 116 0.168 J 0.5 U 8.53 4.96 10.8 2.41 0.0205 J 0.239 J 6.07 0.75 U 0.25 U 0.75 U 36.2 48.6 -- --On-site SB-48-1.5' 1.5 7/13/2010 0.75 U 0.913 92.6 0.25 U 0.5 U 6.02 19.7 8.52 24.6 0.0835 U 0.25 U 15.5 0.75 U 0.25 U 0.75 U 30.1 34.5 -- --On-site SB-48-3' 3 7/13/2010 0.75 U 1.49 112 0.25 U 0.5 U 8.49 15.3 8.81 7.87 0.0835 U 0.25 U 7.67 0.75 U 0.25 U 0.75 U 33.6 37.2 -- --On-site SB-48-6' 6 7/13/2010 0.75 U 2.22 119 0.25 U 0.5 U 7.99 6.83 7.37 3.38 0.0835 U 0.25 U 5.55 0.75 U 0.25 U 0.75 U 35.2 36.6 -- --On-site SB-49-3' 3 7/13/2010 0.75 U 1.19 101 0.25 U 0.5 U 6.25 5.72 8.2 10.8 0.0835 U 0.25 U 17 0.75 U 0.25 U 0.75 U 30.3 29.4 -- --On-site SB-49-4' 4 7/13/2010 0.75 U 1.29 86 0.25 U 0.5 U 6.43 6.17 11.7 86.2 0.0835 U 0.25 U 56 0.75 U 0.25 U 0.75 U 56.8 32.8 -- --On-site SB-49-6' 6 7/13/2010 0.75 U 1.8 80.1 0.25 U 0.5 U 6.85 6.75 6.11 9.11 0.0835 U 0.25 U 8.51 0.75 U 0.25 U 0.75 U 31.8 27.4 -- --On-site SB-50-1.5' 1.5 7/13/2010 0.75 U 2.1 111 0.25 U 0.5 U 8 6.06 14.9 15.3 0.0835 U 0.25 U 17.8 0.75 U 0.25 U 0.75 U 30.2 52.9 -- --On-site SB-50-3' 3 7/13/2010 0.75 U 2.8 97.8 0.25 U 0.5 U 8.3 8.49 8.32 3.12 0.0835 U 0.25 U 5.92 0.75 U 0.25 U 0.75 U 36.3 29.3 -- --On-site SB-50-6' 6 7/13/2010 0.75 U 5.03 125 0.25 U 0.5 U 8.73 7.51 7.56 3.41 0.0835 U 0.25 U 5.74 0.75 U 0.25 U 0.75 U 41.7 32.7 -- --On-site SB-51-1.5' 1.5 7/13/2010 0.75 U 1.83 68.8 0.25 U 0.5 U 8.25 5.55 10.5 11.4 0.0835 U 0.25 U 36 0.75 U 0.25 U 0.75 U 28.2 45.3 -- --On-site SB-51-3' 3 7/13/2010 0.75 U 2.15 124 0.25 U 0.5 U 8.35 6.57 9.58 6.7 0.0835 U 0.25 U 7.75 0.75 U 0.25 U 0.75 U 29.7 33.5 -- --On-site SB-51-6.5' 6.5 7/13/2010 0.75 U 1.63 61.7 0.25 U 0.5 U 6.98 5.13 9.81 15.1 0.0835 U 0.25 U 7.35 0.75 U 0.25 U 0.75 U 20.4 124 -- --On-site SB-51-9' 9 7/13/2010 0.75 U 3.98 74 0.25 U 0.5 U 9.75 5.7 9.89 3.59 0.0835 U 0.25 U 7.26 0.75 U 0.25 U 0.75 U 35.3 25.2 -- --On-site SB-52-1' 1 7/12/2010 0.75 U 1.18 88.2 0.25 U 0.5 U 5.99 5.2 6.21 6.78 0.0835 U 0.25 U 4.25 0.75 U 0.25 U 0.75 U 23.2 25.2 -- --On-site SB-52-3' 3 7/12/2010 0.75 U 2.69 90.7 0.25 U 0.5 U 7.25 6.52 6.71 4.04 0.0835 U 0.25 U 4.98 0.75 U 0.25 U 0.75 U 31.2 26.2 -- --On-site SB-52-6' 6 7/12/2010 0.75 U 2.3 79.4 0.25 U 0.5 U 7.22 6.85 6.38 2.63 0.0835 U 0.25 U 4.65 0.75 U 0.25 U 0.75 U 35.9 24.2 -- --On-site SB-52-9' 9 7/12/2010 0.75 U 4.94 90.4 0.26 0.5 U 12.9 6.43 12.3 4.41 0.0835 U 0.25 U 8.71 0.75 U 0.25 U 0.75 U 40.8 31.1 -- --On-site SB-53-0.5' 0.5 7/12/2010 0.75 U 2.59 127 0.261 0.5 U 10.4 8.73 13.2 39.1 0.0835 U 0.25 U 16.8 0.75 U 0.25 U 0.75 U 39.7 109 -- --On-site SB-53-3' 3 7/13/2010 0.75 U 3.52 112 0.292 0.5 U 11.1 9.03 8.78 5.92 0.0835 U 0.25 U 9.48 0.75 U 0.25 U 0.75 U 44.1 46.2 -- --On-site SB-53-6' 6 7/13/2010 0.75 U 4.03 79.8 0.25 U 0.5 U 8.7 7.4 10.6 14.4 0.0835 U 0.25 U 7.4 0.75 U 0.25 U 0.75 U 38.7 40.6 -- --On-site SB-53-9' 9 7/13/2010 0.75 U 4.47 104 0.25 U 0.5 U 10.9 7.99 8.67 4.04 0.0835 U 0.25 U 15.9 0.75 U 0.25 U 0.75 U 34.8 55.2 -- --On-site SB-54-1' 1 7/12/2010 0.75 U 2.87 117 0.25 U 0.5 U 9.19 5.2 23.7 9.21 0.0835 U 0.25 U 7.47 0.75 U 0.25 U 0.75 U 54.9 35.9 -- --On-site SB-54-3' 3 7/12/2010 0.795 2.35 111 0.257 0.5 U 8.79 7.15 11.6 7.95 0.0835 U 0.25 U 10.1 0.75 U 0.25 U 0.75 U 40.2 50.2 -- --On-site SB-54-6' 6 7/12/2010 0.75 U 2.22 76.3 0.25 U 0.5 U 7.36 7.14 9.86 2.82 0.0835 U 0.25 U 6.94 0.75 U 0.25 U 0.75 U 34.7 46.1 -- --On-site SB-54-9' 9 7/12/2010 0.75 U 3.44 137 0.25 U 0.5 U 8.38 9.87 11 4.75 0.0835 U 0.25 U 7.81 0.75 U 0.25 U 0.75 U 46.2 43.7 -- --On-site SB-55-1.5' 1.5 7/13/2010 1.44 1.46 109 0.25 U 0.5 U 8.8 5.52 7.93 3.75 0.0835 U 0.25 U 5.07 0.75 U 0.25 U 0.75 U 30 36.7 0.5 U 45On-site SB-55-3' 3 7/13/2010 1.94 2.32 101 0.25 U 0.5 U 9.59 5.62 8.19 4.04 0.0835 U 0.25 U 5.22 0.75 U 0.25 U 0.75 U 33.4 37.4 0.5 U 50On-site SB-55-6' 6 7/13/2010 0.75 U 3.23 101 0.25 U 0.5 U 13.4 9.81 9.61 3.47 0.0835 U 0.767 8.03 0.75 U 0.25 U 0.75 U 39.5 47.3 0.5 U 17On-site SB-55-9' 9 7/13/2010 0.75 U 1.06 52.9 0.25 U 0.5 U 7.93 3.86 6.67 2.75 0.0835 U 0.25 U 6.35 0.75 U 0.25 U 0.75 U 22.7 24.3 0.5 U 5.6On-site SB-56-0.5' 0.5 7/14/2010 0.75 U 2.78 105 0.25 U 0.5 U 6.66 3.85 7.85 346 0.0835 U 0.25 U 4.58 0.75 U 0.25 U 0.75 U 23.6 25.5 3.8 310On-site SB-56-3' 3 7/14/2010 1.41 1.83 90.5 0.25 U 0.5 U 8.42 5.22 7.23 6.96 0.0835 U 0.25 U 4.6 0.75 U 0.25 U 0.75 U 34.8 33.6 0.51 200On-site SB-56-6' 6 7/14/2010 0.75 U 4.35 108 0.25 U 0.5 U 6.65 8.24 8.67 4.16 0.0835 U 0.25 U 4.99 0.75 U 0.25 U 0.75 U 41.2 50.1 0.5 U 56On-site SB-56-9' 9 7/14/2010 0.75 U 3.57 64.5 0.25 U 0.5 U 10.6 5.42 9.64 3.5 0.0835 U 0.25 U 9.1 0.75 U 0.25 U 0.75 U 33.6 25.3 0.5 U 11On-site SS-1 0 2/24/2006 0.5 U 2 93.7 0.2 U 0.5 U 8.7 5.3 14.5 23.9 0.21 0.64 5.4 0.5 U 0.58 2 U 30.2 136 -- --On-site SS-2 0 2/24/2006 0.97 1.3 55.2 0.2 U 0.5 U 6.7 2.1 26.4 24800 0.1 U 0.5 U 6.8 0.5 U 0.38 2 U 12.1 70.4 -- --On-site SS-3 0 2/24/2006 1.4 4.7 57.8 0.2 U 0.5 4.6 1.8 24.1 451 0.23 0.5 U 3 0.5 U 0.24 7.8 7.8 47.1 2 --On-site SS-4 0 2/24/2006 0.54 3.7 191 0.2 U 0.5 U 29.8 7.4 21.8 691 0.1 U 0.5 U 16.7 0.5 U 0.32 2 U 45.2 289 -- --On-site SS-5 0 2/24/2006 0.5 U 2.8 114 0.2 U 0.5 U 12.3 7 15.3 147 0.1 U 1.1 9.5 0.5 U 0.39 2 U 39.2 135 -- --On-site SS-6 0 2/24/2006 0.5 U 2.5 59.8 0.2 U 0.5 U 17.3 6.5 12.4 3.2 0.1 U 0.77 16.6 0.5 U 0.23 2 U 37.5 21.6 -- --
Att_A_Tables_Lodi Page 3 of 7 IRIS ENVIROMENTAL
TABLE A-1ANALYTICAL DATA INCLUDED IN THE HRA - SOILS (0-10 FEET BGS)
INORGANICSFormer Lodi Manufactured Gas Plant
Lodi, CaliforniaL
ocat
ion
Sam
ple
ID
Dep
th (f
eet b
gs)
Sam
ple
Dat
e
Ant
imon
y
Ars
enic
Bar
ium
Ber
ylliu
m
Cad
miu
m
Chr
omiu
m
Cob
alt
Cop
per
Lea
d
Mer
cury
Mol
ybde
num
Nic
kel
Sele
nium
Silv
er
Tha
llium
Van
adiu
m
Zin
c
Cya
nide
, Tot
al
Am
mon
ia (a
s N)
On-site SS-7 0 2/24/2006 49.6 9.2 132 0.2 U 0.5 U 12.5 7.9 48.4 1400 0.1 U 1.4 103 0.5 U 0.46 2 U 154 145 -- --On-site SS-8 0 2/24/2006 26.7 7.5 104 0.2 U 0.5 U 14.2 6.9 180 2320 0.11 1.6 76.4 0.5 U 0.17 2 U 58.7 140 -- --On-site SS-9 0 2/24/2006 0.5 U 3.2 106 0.21 0.5 U 16.1 6.4 19.9 165 0.1 U 1.1 14 0.5 U 0.23 2 U 40.7 63.7 -- --On-site SS-10 0 7/14/2010 -- -- -- -- -- -- -- -- 599 -- -- -- -- -- -- -- -- -- --On-site TP-1-0.5' 0.5 7/12/2010 0.75 U 1.44 93.3 0.25 U 0.5 U 5.91 4.42 7.13 108 0.0835 U 0.25 U 4.53 0.75 U 0.25 U 0.75 U 19.6 39.6 -- --On-site TP-1-3' 3 7/12/2010 0.75 U 0.941 88.8 0.25 U 0.5 U 6.43 6.15 6.7 9.75 0.0835 U 0.25 U 4.55 0.75 U 0.25 U 0.75 U 27 27.2 -- --On-site TP-1-6' 6 7/12/2010 0.75 U 0.983 53.1 0.25 U 0.5 U 4.7 4.68 4.7 4.29 0.0835 U 0.25 U 3.54 0.75 U 0.25 U 0.75 U 21.7 20.1 -- --On-site TP-2-0.5' 0.5 7/12/2010 0.75 U 2.12 100 0.25 U 0.5 U 9.79 6.08 16.4 200 0.0835 U 0.25 U 10.8 0.75 U 0.25 U 0.75 U 23.1 60.3 -- --On-site TP-2-3' 3 7/12/2010 0.75 U 1.61 92.3 0.25 U 0.5 U 7.4 5.99 9.46 39.3 0.0835 U 0.25 U 5.62 0.75 U 0.25 U 0.75 U 25.5 35.7 -- --On-site TP-2-6' 6 7/12/2010 0.75 U 1.39 82.4 0.25 U 0.5 U 8 6.38 7.35 28.1 0.0835 U 0.25 U 5.74 0.75 U 0.25 U 0.75 U 31.8 29 -- --On-site TP-2-9' 9 7/12/2010 0.75 U 0.961 59.5 0.25 U 0.5 U 6.26 5.62 5.33 8.11 0.0835 U 0.25 U 4.13 0.75 U 0.25 U 0.75 U 27.7 23.4 -- --On-site TP-3-0.5' 0.5 7/12/2010 0.75 U 2.07 110 0.25 U 0.5 U 7.11 4.57 20.4 347 0.0835 U 0.25 U 4.79 0.75 U 0.25 U 0.75 U 24.2 61.9 -- --On-site TP-3-3' 3 7/12/2010 0.75 U 2.08 89.8 0.25 U 0.5 U 7.41 5.83 8.75 75.1 0.0835 U 0.25 U 5.32 0.75 U 0.25 U 0.75 U 27.2 35.6 -- --On-site TP-3-6' 6 7/12/2010 0.75 U 1.55 76.8 0.25 U 0.5 U 6.81 5.98 6.09 19.9 0.0835 U 0.25 U 4.66 0.75 U 0.25 U 0.75 U 29.2 25.8 -- --On-site TP-4-0.5' 0.5 7/12/2010 0.75 U 0.867 104 0.25 U 0.5 U 6.35 5.69 7.42 8.68 0.0835 U 0.25 U 4.76 0.75 U 0.25 U 0.75 U 23.4 32.6 -- --On-site TP-4-3' 3 7/12/2010 0.75 U 1.47 62.4 0.25 U 0.5 U 5.81 5.77 4.84 4.69 0.0835 U 0.25 U 3.78 0.75 U 0.25 U 0.75 U 25.9 21.9 -- --On-site TP-4-6' 6 7/12/2010 0.75 U 1.73 61.8 0.25 U 0.5 U 6.33 5.61 5.24 2.83 0.0835 U 0.25 U 4.28 0.75 U 0.25 U 0.75 U 29.1 21.9 -- --On-site TP-5-0.5' 0.5 7/13/2010 0.75 U 0.988 109 0.25 U 0.5 U 6.53 6.82 8.41 92.7 0.0835 U 0.25 U 9.24 0.75 U 0.25 U 0.75 U 22.6 50.9 -- --On-site TP-5-3' 3 7/13/2010 0.75 U 1.17 90 0.25 U 0.5 U 6.92 6.23 6.99 8.92 0.0835 U 0.25 U 5.19 0.75 U 0.25 U 0.75 U 28.6 29.8 -- --On-site TP-5-6' 6 7/13/2010 0.75 U 2.62 86.2 0.25 U 0.5 U 7.28 6.53 6.26 3.1 0.0835 U 0.25 U 4.73 0.75 U 0.25 U 0.75 U 33.1 25.8 -- --On-site TP-6-0.5' 0.5 7/13/2010 1.13 4.78 123 0.25 U 0.5 U 11 6.75 24.5 701 0.158 0.25 U 9.38 0.75 U 0.25 U 0.75 U 25.1 185 -- --On-site TP-6-3' 3 7/13/2010 0.75 U 1.66 95.3 0.25 U 0.5 U 7.73 6.78 8.29 57.6 0.0835 U 0.25 U 5.63 0.75 U 0.25 U 0.75 U 28.5 40.2 -- --On-site TP-6-6' 6 7/13/2010 0.75 U 1.83 71.3 0.25 U 0.5 U 7.2 6.48 6.05 8.05 0.0835 U 0.25 U 4.82 0.75 U 0.25 U 0.75 U 29.4 26.9 -- --On-site TP-7-25S 1.17 7/12/2010 0.75 U 0.75 U 162 0.331 0.5 U 7.06 9.66 8.05 259 0.0835 U 0.25 U 20.1 0.75 U 0.25 U 0.75 U 26.7 127 -- --On-site TP-7-25D 2.67 7/12/2010 0.75 U 1.48 109 0.25 U 0.5 U 7.36 8.46 7.21 22.4 0.0835 U 0.25 U 6.92 0.75 U 0.25 U 0.75 U 28.6 44.1 -- --On-site TP-7-40S 1.17 7/12/2010 0.75 U 2.56 106 0.25 U 0.5 U 7.23 5.47 10.7 11.9 0.0835 U 0.25 U 3.71 0.75 U 0.25 U 0.75 U 44.6 28.3 -- --On-site TP-7-40D 2.67 7/12/2010 0.75 U 2.03 103 0.25 U 0.5 U 10.3 5.54 11.1 4.08 0.0835 U 0.25 U 4.37 0.75 U 0.25 U 0.75 U 43 32.9 -- --On-site TP-8-0.5' 0.5 7/13/2010 6.25 2.83 79.5 0.25 U 0.5 U 7.02 5.32 13 250 0.0835 U 0.25 U 13.4 0.75 U 0.25 U 0.75 U 23.7 75 -- --On-site TP-8-3' 3 7/13/2010 0.75 U 2.03 105 0.25 U 0.5 U 7.11 6.37 8.46 7.36 0.0835 U 0.25 U 7.03 0.75 U 0.25 U 0.75 U 29.1 33.9 -- --On-site TP-8-6' 6 7/13/2010 0.75 U 1.54 97 0.25 U 0.5 U 7.37 8.2 6.79 4.04 0.0835 U 0.25 U 5.67 0.75 U 0.25 U 0.75 U 35.7 28.6 -- --On-site TP-9-0.5' 0.5 7/13/2010 0.75 U 3.3 146 0.25 U 0.5 U 11.1 8.84 46.2 168 0.215 0.361 155 0.75 U 0.25 U 0.75 U 157 107 -- --On-site TP-9-3' 3 7/13/2010 0.75 U 2.13 113 0.25 U 0.5 U 7.26 7.35 14.4 24.9 0.0835 U 0.25 U 30.7 0.75 U 0.25 U 0.75 U 65.6 42.6 -- --On-site TP-9-6' 6 7/13/2010 0.75 U 2 109 0.25 U 0.5 U 7.01 6.91 6.7 5.49 0.0835 U 0.25 U 6.81 0.75 U 0.25 U 0.75 U 36.8 27.2 -- --On-site TP-9-9' 9 7/13/2010 0.75 U 1.1 75.5 0.25 U 0.5 U 5.53 5.76 5.79 2.91 0.0835 U 0.25 U 4.59 0.75 U 0.25 U 0.75 U 28 22 -- --On-site TP-10-0.5' 0.5 7/13/2010 0.75 U 1.69 108 0.25 U 0.5 U 7.9 6.13 11.4 30.7 0.0835 U 0.25 U 4.96 0.75 U 0.25 U 0.75 U 30.4 38.3 -- --On-site TP-10-3' 3 7/13/2010 0.75 U 2.23 99.6 0.25 U 0.5 U 8.4 6.17 14.6 15.9 0.0835 U 0.25 U 5.13 0.75 U 0.25 U 0.75 U 31.6 37.6 -- --On-site TP-10-6' 6 7/13/2010 0.75 U 2.25 105 0.489 0.5 U 7.66 9.34 7.9 4.92 0.0835 U 0.25 U 27.3 0.75 U 0.25 U 0.75 U 34.3 108 -- --On-site TP-11-0.5' 0.5 7/13/2010 0.75 U 1.06 71.9 0.25 U 0.5 U 5.76 5.48 10 32 0.0835 U 0.25 U 15.6 0.75 U 0.25 U 0.75 U 23.1 75.7 -- --On-site TP-11-3' 3 7/13/2010 0.75 U 1.42 109 0.25 U 0.5 U 6.46 6.19 8 9.43 0.0835 U 0.25 U 6.77 0.75 U 0.25 U 0.75 U 25.7 141 -- --On-site TP-11-6' 6 7/13/2010 0.75 U 1.49 98.1 0.25 U 0.5 U 7.12 5.63 6.73 4.47 0.0835 U 0.25 U 4.84 0.75 U 0.25 U 0.75 U 35.1 99.5 -- --On-site TP-11-9' 9 7/13/2010 0.75 U 1.16 59 0.25 U 0.5 U 4.32 4.16 4.5 3.2 0.0835 U 0.25 U 3.21 0.75 U 0.25 U 0.75 U 22.8 39.4 -- --
LIW Property SB-35-0' 0 11/9/2009 0.75 U 3.27 104 0.25 U 0.5 U 7.82 5.65 17.9 129 0.0835 U 0.25 U 12.5 0.75 U 0.25 U 0.75 U 24.7 148 2 --LIW Property SB-35-3' 3 11/9/2009 0.75 U 3 97.9 0.25 U 0.5 U 7.67 6.74 7.61 3.39 0.0835 U 0.25 U 5.66 0.75 U 0.25 U 0.75 U 31.9 40.7 0.5 U --
Att_A_Tables_Lodi Page 4 of 7 IRIS ENVIROMENTAL
TABLE A-1ANALYTICAL DATA INCLUDED IN THE HRA - SOILS (0-10 FEET BGS)
INORGANICSFormer Lodi Manufactured Gas Plant
Lodi, CaliforniaL
ocat
ion
Sam
ple
ID
Dep
th (f
eet b
gs)
Sam
ple
Dat
e
Ant
imon
y
Ars
enic
Bar
ium
Ber
ylliu
m
Cad
miu
m
Chr
omiu
m
Cob
alt
Cop
per
Lea
d
Mer
cury
Mol
ybde
num
Nic
kel
Sele
nium
Silv
er
Tha
llium
Van
adiu
m
Zin
c
Cya
nide
, Tot
al
Am
mon
ia (a
s N)
LIW Property SB-35-6' 6 11/9/2009 0.75 U 3.93 77.9 0.25 U 0.5 U 7.14 6.4 7.08 2.5 0.0835 U 0.25 U 8.13 0.75 U 0.25 U 0.75 U 34 28.1 0.5 U --LIW Property SB-35-9' 9 11/9/2009 0.75 U 4.86 84.6 0.25 U 0.5 U 13.2 7.44 10.7 3.31 0.0835 U 0.375 10.5 0.75 U 0.25 U 0.75 U 33.4 29.4 0.5 U --LIW Property SB-36-0' 0 11/9/2009 0.75 U 3.76 80.8 0.25 U 0.5 U 33.8 7.67 114 45.3 0.0835 U 7.84 603 0.75 U 0.25 U 0.75 U 20.9 90 0.5 U --LIW Property SB-36-3' 3 11/9/2009 0.75 U 4.36 106 0.288 0.5 U 31.1 8.34 12.2 9.31 0.0835 U 4.28 19 0.75 U 0.25 U 0.75 U 35.2 55.5 0.5 U --LIW Property SB-36-6' 6 11/9/2009 0.75 U 3.21 108 0.25 U 0.5 U 8.8 7.71 7.59 3.24 0.0835 U 0.25 U 7.47 0.75 U 0.25 U 0.75 U 37.3 31.6 0.5 U --LIW Property SB-36-9' 9 11/9/2009 0.75 U 4.34 108 0.302 0.5 U 15.8 9.42 12.2 3.46 0.0835 U 0.336 9.94 0.75 U 0.25 U 0.75 U 47.4 38.6 0.5 U --LIW Property SB-37-0' 0 11/9/2009 0.75 U 1.43 24.8 0.25 U 0.5 U 10.9 2.55 16.2 7.66 0.0835 U 2.19 559 0.75 U 0.25 U 0.75 U 8.5 16 0.5 U --LIW Property SB-37-3' 3 11/9/2009 0.75 U 3.14 147 0.273 0.5 U 8.74 8.23 11.2 12.6 0.0835 U 0.25 U 54.9 0.75 U 0.25 U 0.75 U 34.5 74.6 0.91 --LIW Property SB-37-6' 6 11/9/2009 0.75 U 4.47 150 0.296 0.5 U 10 9.06 9.45 4.04 0.0835 U 0.25 U 15.6 0.75 U 0.25 U 0.75 U 46 41.9 0.5 U --LIW Property SB-37-9' 9 11/9/2009 0.75 U 4.17 59.5 0.25 U 0.5 U 11.8 6.11 8.86 2.77 0.0835 U 0.25 U 9.33 0.75 U 0.25 U 0.75 U 32.9 24.9 0.5 U --LIW Property SB-38-0' 0 11/9/2009 0.75 U 6.35 42.1 0.25 U 0.5 U 12.6 3.45 34.4 53.2 0.0835 U 22.2 32 0.75 U 0.25 U 0.75 U 9.78 70.9 0.5 U --LIW Property SB-38-3' 3 11/9/2009 0.75 U 3.71 120 0.278 0.5 U 8.34 7.74 9.43 6.66 0.0835 U 0.25 U 12 0.75 U 0.25 U 0.75 U 33.9 42.6 0.51 --LIW Property SB-38-6' 6 11/9/2009 0.75 U 4.42 152 0.312 0.5 U 11.1 10 9.62 3.82 0.0835 U 0.25 U 7.6 0.75 U 0.25 U 0.75 U 53.1 39.8 0.5 U --LIW Property SB-38-9' 9 11/9/2009 0.75 U 2.94 87.6 0.25 U 0.5 U 7.12 6.43 7.56 2.65 0.0835 U 0.25 U 5.89 0.75 U 0.25 U 0.75 U 32.7 33 0.5 U --LIW Property SB-39-0' 0 11/9/2009 0.75 U 3.14 63.5 0.25 U 0.5 U 30.2 4.71 28.1 25.9 0.0835 U 6.64 291 0.75 U 0.25 U 0.75 U 17.6 56.4 0.5 U --LIW Property SB-39-3' 3 11/9/2009 0.75 U 2.95 90 0.25 U 0.5 U 8.81 6.46 7.81 3.34 0.0835 U 0.25 U 24.7 0.75 U 0.25 U 0.75 U 29.8 28 0.5 U --LIW Property SB-39-6' 6 11/9/2009 0.75 U 3.79 80.7 0.25 U 0.5 U 7.75 7.62 6.32 2.74 0.0835 U 0.25 U 5.45 0.75 U 0.25 U 0.75 U 36.5 26.3 0.5 U --LIW Property SB-39-9' 9 11/9/2009 0.75 U 3.01 69.4 0.25 U 0.5 U 4.51 4.1 6.24 1.87 0.0835 U 0.332 3.67 0.75 U 0.25 U 0.75 U 19.1 37.9 0.5 U --LIW Property SB-39-9' (DUP-6) 9 11/9/2009 0.75 U 2.11 40.5 0.25 U 0.5 U 6.08 4.91 4.52 1.7 0.0835 U 0.309 3.89 0.75 U 0.25 U 0.75 U 22.1 19.1 0.5 U --LIW Property SB-40-0' 0 11/10/2009 0.75 U 3.93 106 0.25 U 0.5 U 15.8 6.2 49.9 70.9 0.0835 U 0.89 13.4 0.75 U 0.25 U 0.75 U 21.6 85.4 0.5 U --LIW Property SB-40-3' 3 11/10/2009 0.75 U 2.74 88.5 0.25 U 0.5 U 7.64 6.83 9.74 250 0.0835 U 0.938 6.47 0.75 U 0.25 U 0.75 U 27.4 95.5 0.5 U --LIW Property SB-40-6' 6 11/10/2009 0.75 U 2.53 94 0.25 U 0.5 U 6.77 6.85 6.17 3.44 0.0835 U 0.25 U 4.69 0.75 U 0.25 U 0.75 U 29.9 26.3 0.5 U --LIW Property SB-40-9' 9 11/10/2009 0.75 U 2.41 65.4 0.25 U 0.5 U 6.55 5.63 5.39 2.16 0.0835 U 0.25 U 4.14 0.75 U 0.25 U 0.75 U 26.2 23.5 0.5 U --LIW Property SB-41-0' 0 11/10/2009 0.75 U 1.87 95.2 0.25 U 0.5 U 6.95 3.52 20.2 17.7 0.0835 U 0.301 21.5 0.75 U 0.25 U 0.75 U 13.4 33.8 0.5 U --LIW Property SB-41-3' 3 11/10/2009 0.75 U 4.31 112 0.258 0.5 U 8.76 8.11 7.99 3.72 0.0835 U 0.25 U 7.08 0.75 U 0.25 U 0.75 U 37 34 0.5 U --LIW Property SB-41-6' 6 11/10/2009 0.75 U 3.37 146 0.267 0.5 U 8.1 8.36 7.78 3.62 0.0835 U 0.25 U 6.13 0.75 U 0.25 U 0.75 U 38.1 34.7 0.5 U --LIW Property SB-41-9' 9 11/10/2009 0.75 U 2.84 38.6 0.25 U 0.5 U 7.5 3.94 6.05 1.91 0.0835 U 0.25 U 6.57 0.75 U 0.25 U 0.75 U 23.2 17.2 0.5 U --LIW Property SB-42-0' 0 11/10/2009 0.75 U 1.99 61 0.25 U 0.5 U 5.51 4.3 11.6 16.3 0.0835 U 0.25 U 5.56 0.75 U 0.25 U 0.75 U 16.5 30.2 0.5 U --LIW Property SB-42-3' 3 11/10/2009 0.75 U 2.7 100 0.25 U 0.5 U 6.64 6.73 6.78 3.43 0.0835 U 0.25 U 4.8 0.75 U 0.25 U 0.75 U 29.3 28.2 0.5 U --LIW Property SB-42-6' 6 11/10/2009 0.75 U 5.75 156 0.25 U 0.5 U 7.71 11.1 8.04 3.94 0.0835 U 0.25 U 6.26 0.75 U 0.25 U 0.75 U 49.6 40.6 0.5 U --LIW Property SB-42-9' 9 11/10/2009 0.75 U 3.12 48.8 0.25 U 0.5 U 8.38 5.53 8 2.42 0.0835 U 0.25 U 6.57 0.75 U 0.25 U 0.75 U 25.5 20.7 0.5 U --LIW Property SB-43-0' 0 11/10/2009 0.75 U 2.35 123 0.25 U 0.5 U 6.67 4.55 14.4 99.8 0.0835 U 0.25 U 10.1 0.75 U 0.25 U 0.75 U 18.8 130 0.68 --LIW Property SB-43-3' 3 11/10/2009 0.75 U 2.45 88.8 0.25 U 0.5 U 7.16 6.71 6.97 3.77 0.0835 U 0.25 U 5.01 0.75 U 0.25 U 0.75 U 28.6 37.2 0.5 U --LIW Property SB-43-6' 6 11/10/2009 0.75 U 2.4 67.9 0.25 U 0.5 U 5.52 5.91 5.12 2.06 0.0835 U 0.25 U 7.56 0.75 U 0.25 U 0.75 U 26.3 39.7 0.5 U --LIW Property SB-43-9' 9 11/10/2009 0.75 U 4.26 77.4 0.25 U 0.5 U 8.67 6.22 7.79 2.71 0.0835 U 0.25 U 7.18 0.75 U 0.25 U 0.75 U 30.9 23.9 0.5 U --LIW Property SB-44-0' 0 11/10/2009 0.75 U 3.87 74.1 0.25 U 0.5 U 39.1 10.7 106 36 0.0835 U 9.7 4330 0.75 U 0.25 U 0.75 U 19.1 89.5 0.5 U --LIW Property SB-44-3' 3 11/10/2009 0.75 U 3.84 84.3 0.25 U 0.5 U 14.5 9.58 35.7 15.3 0.0835 U 3.57 115 0.75 U 0.25 U 0.75 U 35.2 57.7 0.5 U --LIW Property SB-44-6' 6 11/10/2009 0.75 U 4.26 138 0.36 0.5 U 10.9 11.4 11.4 7.01 0.0835 U 0.25 U 14.6 0.75 U 0.25 U 0.75 U 47.2 69.7 0.5 U --LIW Property SB-44-9' 9 11/10/2009 0.75 U 1.98 52.8 0.25 U 0.5 U 6.34 5.33 5.11 1.88 0.0835 U 0.25 U 4.17 0.75 U 0.25 U 0.75 U 23.9 22.2 0.5 U --LIW Property SB-45-0' 0 11/10/2009 0.75 U 1.44 40.4 0.25 U 0.5 U 4.61 2.69 9.93 13.8 0.0835 U 0.413 81.6 0.75 U 0.25 U 0.75 U 9.86 23.5 0.5 U --LIW Property SB-45-3' 3 11/10/2009 0.75 U 3.11 136 0.275 0.5 U 8.42 8.31 8.62 5.94 0.0835 U 0.25 U 10.8 0.75 U 0.25 U 0.75 U 36.8 36.9 0.5 U --LIW Property SB-45-6' 6 11/10/2009 0.75 U 1.97 77.2 0.25 U 0.5 U 4.61 4.9 4.55 1.68 0.0835 U 0.25 U 3.36 0.75 U 0.25 U 0.75 U 21.3 20.7 0.5 U --LIW Property SB-45-9' 9 11/10/2009 0.75 U 2.33 56.5 0.25 U 0.5 U 7.43 4.18 5.98 2.08 0.0835 U 0.25 U 5.8 0.75 U 0.25 U 0.75 U 19.5 18.5 0.5 U --
Att_A_Tables_Lodi Page 5 of 7 IRIS ENVIROMENTAL
TABLE A-1ANALYTICAL DATA INCLUDED IN THE HRA - SOILS (0-10 FEET BGS)
INORGANICSFormer Lodi Manufactured Gas Plant
Lodi, CaliforniaL
ocat
ion
Sam
ple
ID
Dep
th (f
eet b
gs)
Sam
ple
Dat
e
Ant
imon
y
Ars
enic
Bar
ium
Ber
ylliu
m
Cad
miu
m
Chr
omiu
m
Cob
alt
Cop
per
Lea
d
Mer
cury
Mol
ybde
num
Nic
kel
Sele
nium
Silv
er
Tha
llium
Van
adiu
m
Zin
c
Cya
nide
, Tot
al
Am
mon
ia (a
s N)
LIW Property SB-46-0' 0 11/10/2009 0.75 U 10.4 81.3 0.25 U 0.5 U 58.5 4.99 62.9 52.3 0.0835 U 14.3 318 0.75 U 0.25 U 0.75 U 14.8 85.3 0.5 U --LIW Property SB-46-3' 3 11/10/2009 0.75 U 2.33 101 0.25 0.5 U 7.12 6.92 6.87 3.92 0.0835 U 0.25 U 5.14 0.75 U 0.25 U 0.75 U 31.5 29.7 0.5 U --LIW Property SB-46-6' 6 11/10/2009 0.75 U 3.59 110 0.25 U 0.5 U 9.43 8.43 8.08 3.05 0.0835 U 0.25 U 6.06 0.75 U 0.25 U 0.75 U 40.2 32.2 0.5 U --LIW Property SB-46-9' 9 11/10/2009 0.75 U 1.61 37.2 0.25 U 0.5 U 3.83 3.71 4.18 1.47 0.0835 U 0.25 U 2.63 0.75 U 0.25 U 0.75 U 16.5 16.6 0.5 U --Off-site ROW SB-3-0' 0 10/14/2008 0.75 U 0.75 U 23 0.25 U 0.5 U 2.66 2.13 5.47 1.96 0.127 0.25 U 2.99 0.75 U 0.25 U 0.75 U 12.6 112 0.5 U --Off-site ROW SB-3-3' 3 10/14/2008 0.75 U 1.48 97 0.25 U 0.5 U 6.32 4.86 12.9 53.1 0.111 0.25 U 7.37 0.75 U 0.25 U 0.75 U 22.1 63.9 0.5 U --Off-site ROW SB-3-6' 6 10/14/2008 0.75 U 1.27 71 0.25 U 0.5 U 5.52 4.84 9.34 22.1 0.0835 U 0.25 U 5.66 0.75 U 0.25 U 0.75 U 21.2 44.9 0.5 U --Off-site ROW SB-3-9' 9 10/14/2008 0.75 U 0.75 U 30.9 0.25 U 0.5 U 3.6 3.72 5.63 2 0.0835 U 0.25 U 3.48 0.75 U 0.25 U 0.75 U 14.7 109 0.5 U --Off-site ROW SB-3-9' (DUP-3) 9 10/14/2008 0.75 U 2.08 82.7 0.25 U 0.5 U 7.07 4.91 10.5 13.4 0.0835 U 0.25 U 6.05 0.75 U 0.25 U 0.75 U 25.9 34.8 0.5 U --Off-site ROW SB-4-0' 0 10/14/2008 0.75 U 1.17 63.3 0.25 U 0.5 U 5.97 4.44 7.39 14.9 0.0835 U 0.25 U 4.9 0.75 U 0.25 U 0.75 U 19.5 34.9 2.5 --Off-site ROW SB-4-3' 3 10/14/2008 0.75 U 1.29 83.7 0.251 0.5 U 9.6 5.02 11.7 64.9 0.0835 U 0.25 U 15 0.75 U 0.25 U 0.75 U 22.8 66.1 0.94 --Off-site ROW SB-4-6' 6 10/14/2008 0.75 U 1.23 81.6 0.274 0.5 U 6.85 6.68 9.86 24.8 0.0835 U 0.25 U 11.1 0.75 U 0.25 U 0.75 U 24.4 56.3 0.5 U --Off-site ROW SB-4-7' 7 10/14/2008 0.75 U 2.19 119 0.282 0.5 U 6.64 4.12 40.5 783 0.0835 U 0.25 U 14 0.75 U 0.25 U 0.75 U 35.9 56.8 0.5 U --Off-site ROW SB-4-9' 9 10/14/2008 0.75 U 0.75 U 40 0.25 U 0.5 U 4.29 6.96 3.79 1.8 0.0835 U 0.33 4.02 0.75 U 0.25 U 0.75 U 17.9 26.6 0.5 U --Off-site ROW SB-11-0' 0 10/14/2008 0.75 U 1.29 109 0.271 0.5 U 11.7 4.29 11.2 101 0.0835 U 0.25 U 8.15 0.75 U 0.25 U 0.75 U 24 56.2 4.1 --Off-site ROW SB-11-3' 3 10/14/2008 0.75 U 1.9 101 0.409 0.5 U 8.06 4.82 13.5 4.7 0.0835 U 0.25 U 8.15 0.75 U 0.25 U 0.75 U 63.5 39.2 0.5 U --Off-site ROW SB-11-6' 6 10/14/2008 0.75 U 2.04 94.4 0.32 0.5 U 8.42 4.82 9.92 3.62 0.0835 U 0.25 U 8.84 0.75 U 0.25 U 0.75 U 36.9 31.2 0.5 U --Off-site ROW SB-11-9' 9 10/14/2008 0.75 U 0.893 45.1 0.25 U 0.5 U 7.43 4.28 6.6 2.42 0.0835 U 0.25 U 48.9 0.75 U 0.25 U 0.75 U 20.3 23.6 0.5 U --Off-site ROW SB-12-0' 0 10/14/2008 0.75 U 1.38 110 0.265 0.5 U 8.54 5.29 13.9 99.2 0.0835 U 0.25 U 8.71 0.75 U 0.25 U 0.75 U 22.8 83.5 0.84 --Off-site ROW SB-12-1.5' 1.5 10/14/2008 0.75 U 1.94 81.8 0.254 0.5 U 6.06 6.11 4.97 2.48 0.0835 U 0.25 U 5.46 0.75 U 0.25 U 0.75 U 24.8 28.1 0.5 U --Off-site ROW SB-12-3' 3 10/14/2008 2.03 2.82 123 0.306 0.5 U 6.37 4.86 25.6 383 0.0835 U 0.262 28.4 0.75 U 0.25 U 0.75 U 46.8 86.7 0.96 --Off-site ROW SB-12-6' 6 10/14/2008 0.75 U 1.75 101 0.379 0.5 U 8.43 4.77 24.1 54 0.128 0.25 U 52.4 0.75 U 0.25 U 0.75 U 47.5 82 0.5 U --Off-site ROW SB-12-9' 9 10/14/2008 0.75 U 1.5 96.7 0.291 0.5 U 8.28 5.09 9.33 7.67 0.0835 U 0.25 U 14.2 0.75 U 0.25 U 0.75 U 38.7 40.4 0.5 U --Off-site ROW SB-26-0.5' 0.5 11/5/2009 0.75 U 1.41 81.9 0.25 U 0.5 U 4.73 4.4 5.84 6.03 0.0835 U 0.25 U 3.86 0.75 U 0.25 U 0.75 U 16.7 24.8 -- --Off-site ROW SB-26-5' 5 11/5/2009 0.75 U 2.32 48.9 0.25 U 0.5 U 5.78 5.01 4.61 1.81 0.0835 U 0.25 U 3.57 0.75 U 0.25 U 0.75 U 25.2 16.5 -- --Off-site ROW SB-27-0.5' 0.5 11/5/2009 0.75 U 1.92 101 0.25 U 0.5 U 5.51 6.11 7.1 52.1 0.0835 U 0.25 U 10.6 0.75 U 0.25 U 0.75 U 20.4 47 -- --Off-site ROW SB-27-5' 5 11/5/2009 0.75 U 1.42 36.9 0.25 U 0.5 U 5.24 4.09 3.91 3.41 0.0835 U 0.25 U 3.3 0.75 U 0.25 U 0.75 U 21.4 17.6 -- --Off-site ROW SB-27-10' (DUP-5) 10 11/5/2009 0.75 U 1.42 36.7 0.25 U 0.5 U 3.28 3.71 3.75 1.25 0.0835 U 0.25 U 2.51 0.75 U 0.25 U 0.75 U 16.5 15.5 -- --Off-site ROW SB-28-0.5' 0.5 11/5/2009 0.75 U 1.39 95.5 0.25 U 0.5 U 6.65 4.93 8.99 52.1 0.0835 U 0.25 U 6.43 0.75 U 0.25 U 0.75 U 21.7 50.2 -- --Off-site ROW SB-28-8' 8 11/5/2009 0.75 U 2.82 54.1 0.25 U 0.5 U 10.2 5.16 5.14 3.97 0.0835 U 0.785 4.82 0.75 U 0.25 U 0.75 U 26.7 19.8 -- --Off-site ROW SB-29-0.5' 0.5 11/4/2009 0.75 U 2.07 102 0.25 U 0.5 U 6.97 5.44 8.48 29.5 0.0835 U 0.25 U 7.81 0.75 U 0.25 U 0.75 U 23.8 51.4 -- --Off-site ROW SB-29-5' 5 11/4/2009 0.75 U 2.42 63.1 0.25 U 0.5 U 6.5 4.73 4.92 1.93 0.0835 U 0.25 U 4.08 0.75 U 0.25 U 0.75 U 32 22.3 -- --Off-site ROW SB-29-10' 10 11/4/2009 0.75 U 1.72 65.9 0.25 U 0.5 U 13.3 8.12 8.43 2.61 0.0835 U 0.25 U 11 0.75 U 0.25 U 0.75 U 30.1 25.8 -- --Off-site ROW SB-30-0.5' 0.5 11/4/2009 0.75 U 1.78 133 0.25 U 0.5 U 8.35 6.19 12 57.2 0.0835 U 0.25 U 7.61 0.75 U 0.25 U 0.75 U 28.9 97 -- --Off-site ROW SB-30-5' 5 11/4/2009 0.75 U 3.06 92.1 0.25 U 0.5 U 9.16 7.23 7.49 2.67 0.0835 U 0.25 U 6.11 0.75 U 0.25 U 0.75 U 37.3 29.5 -- --Off-site ROW SB-30-5' (DUP-3) 5 11/4/2009 0.75 U 2.36 88.3 0.25 U 0.5 U 8.4 7.15 7.25 2.62 0.0835 U 0.25 U 5.67 0.75 U 0.25 U 0.75 U 37.6 28.9 -- --Off-site ROW SB-30-10' 10 11/4/2009 0.75 U 3.83 73.9 0.274 0.5 U 20.8 8.42 12.1 3.48 0.0835 U 0.555 12.4 0.75 U 0.25 U 0.75 U 40.7 33.1 -- --Off-site ROW SB-31-0.5' 0.5 11/4/2009 0.75 U 1.89 114 0.25 U 0.5 U 6.88 5.87 7.14 7.18 0.0835 U 0.25 U 5.34 0.75 U 0.25 U 0.75 U 25.8 32.9 -- --Off-site ROW SB-31-5' 5 11/4/2009 0.75 U 2.64 75.6 0.25 U 0.5 U 6.74 6.36 5.57 1.68 0.0835 U 0.25 U 4.21 0.75 U 0.25 U 0.75 U 31.1 22.6 -- --Off-site ROW SB-31-10' 10 11/4/2009 0.75 U 3.13 92.4 0.264 0.5 U 14.3 7.48 10.5 3.73 0.0835 U 0.25 U 11 0.75 U 0.25 U 0.75 U 40 31.7 -- --Off-site ROW SB-32-0.5' 0.5 11/4/2009 0.75 U 1.44 102 0.25 U 0.5 U 6.06 5.58 6.27 5.31 0.0835 U 0.25 U 4.7 0.75 U 0.25 U 0.75 U 21.6 35.9 -- --Off-site ROW SB-32-5' 5 11/4/2009 0.75 U 3.28 97.1 0.25 U 0.5 U 9.04 7.22 7.21 4.6 0.0835 U 0.25 U 6.03 0.75 U 0.25 U 0.75 U 36.2 31 -- --Off-site ROW SB-32-10' 10 11/4/2009 0.75 U 6.6 142 0.455 0.5 U 18.9 11.6 12.9 5.27 0.0835 U 0.25 U 15.7 0.75 U 0.25 U 0.75 U 52.4 42.2 -- --
Att_A_Tables_Lodi Page 6 of 7 IRIS ENVIROMENTAL
TABLE A-1ANALYTICAL DATA INCLUDED IN THE HRA - SOILS (0-10 FEET BGS)
INORGANICSFormer Lodi Manufactured Gas Plant
Lodi, CaliforniaL
ocat
ion
Sam
ple
ID
Dep
th (f
eet b
gs)
Sam
ple
Dat
e
Ant
imon
y
Ars
enic
Bar
ium
Ber
ylliu
m
Cad
miu
m
Chr
omiu
m
Cob
alt
Cop
per
Lea
d
Mer
cury
Mol
ybde
num
Nic
kel
Sele
nium
Silv
er
Tha
llium
Van
adiu
m
Zin
c
Cya
nide
, Tot
al
Am
mon
ia (a
s N)
Off-site ROW SB-33-0.5' 0.5 11/4/2009 0.75 U 3.72 136 0.25 U 0.5 U 15.8 5.29 20.2 80.7 0.0835 U 0.315 23.3 0.75 U 0.25 U 0.75 U 44.4 70.9 -- --Off-site ROW SB-33-5' 5 11/4/2009 0.75 U 3.35 104 0.25 U 0.5 U 7.76 7.1 6.72 2.39 0.0835 U 0.25 U 7.18 0.75 U 0.25 U 0.75 U 38.6 38.5 -- --Off-site ROW SB-33-10' 10 11/4/2009 0.75 U 12 207 0.709 0.5 U 17.4 17.5 11.2 6.7 0.0835 U 0.25 U 30.2 0.75 U 0.25 U 0.75 U 62.2 99.2 -- --Off-site ROW SB-47-0.5' 0.5 7/15/2010 18.6 6.93 415 0.25 U 0.5 U 11.3 4.75 16.4 222 0.0835 U 0.25 U 9.56 0.75 U 0.25 U 0.75 U 44.9 86.5 -- --Off-site ROW SB-47-3' 3 7/15/2010 0.945 1.03 94.9 0.25 U 0.5 U 7.46 5.03 9.12 5.93 0.0835 U 0.25 U 4.86 0.75 U 0.25 U 0.75 U 26.5 33.2 -- --Off-site ROW SB-47-6' 6 7/15/2010 0.75 U 1.59 61.9 0.25 U 0.5 U 5.96 5.88 5.12 2.42 0.0835 U 0.25 U 4.94 0.75 U 0.25 U 0.75 U 26.9 34.6 -- --
Notes:Samples SHADED GRAY are included in the exposed soils (0-0.5 feet bgs) dataset.All analytical results are presented in milligrams per kilogram (mg/kg).-- = not analyzed for. bgs = below ground surfaceDUP = field duplicate sampleLIW = Lodi Iron WorksROW = right-of-wayJ = Estimated value.U = Indicates constituent not detected at concentration equal to or greater than the specified reporting limit.
Att_A_Tables_Lodi Page 7 of 7 IRIS ENVIROMENTAL
TABLE A-2ANALYTICAL DATA INCLUDED IN THE HRA - SOILS (0-10 FEET BGS)
POLYCYCLIC AROMATIC HYDROCARBONSFormer Lodi Manufactured Gas Plant
Lodi, California
Loc
atio
n
Sam
ple
ID
Dep
th (f
eet b
gs)
Sam
ple
Dat
e
1-M
ethy
lnap
htha
lene
2-M
ethy
lnap
htha
lene
Ace
naph
then
e
Ace
naph
thyl
ene
Ant
hrac
ene
Ben
z(a)
anth
race
ne
Ben
z(a)
pyre
ne
Ben
z(b)
fluor
anth
ene
Ben
z(g,
h,i)p
eryl
ene
Ben
z(k)
fluor
anth
ene
Chr
ysen
e
Dib
enz(
a,h)
anth
race
ne
Fluo
rant
hene
Fluo
rene
Inde
n(1,
2,3-
cd)p
yren
e
Nap
htha
lene
Phen
anth
rene
Pyre
ne
B(a
)P E
quiv
alen
t
On-site AK-1-30" 2.5 7/15/2010 0.02 U 0.02 U 0.02 U 0.04 0.02 U 0.078 0.2 0.19 0.57 0.18 0.15 0.036 0.28 0.02 U 0.36 0.02 U 0.081 0.32 0.29On-site AK-1-38" 3.17 7/15/2010 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.024 0.068 0.072 0.23 0.068 0.047 0.02 U 0.078 0.02 U 0.13 0.02 U 0.026 0.096 0.10On-site AK-2-20" 1.7 7/15/2010 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.027 0.025 0.06 0.02 U 0.02 0.02 U 0.033 0.02 U 0.034 0.02 U 0.02 U 0.048 0.039On-site AK-2-34" 2.83 7/15/2010 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.018On-site AK-3-17" 1.42 7/15/2010 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.018On-site SB-1-0' 0 10/15/2008 -- -- 0.019 0.13 0.027 0.16 0.33 0.29 0.33 0.13 0.22 0.027 0.66 0.01 U 0.39 0.041 0.3 0.8 0.44On-site SB-1-3' 3 10/15/2008 -- -- 0.088 0.03 U 0.032 0.01 U 0.014 0.014 0.013 0.01 U 0.01 U 0.01 U 0.02 0.01 U 0.021 0.015 U 0.01 U 0.021 0.020On-site SB-1-6' 6 10/15/2008 -- -- 0.015 U 0.03 U 0.01 U 0.01 U 0.01 U 0.01 U 0.012 0.01 U 0.01 U 0.01 U 0.017 0.01 U 0.01 0.015 U 0.012 0.019 0.0093On-site SB-1-9' 9 10/15/2008 -- -- 0.015 U 0.03 U 0.01 U 0.01 U 0.01 U 0.01 U 0.01 U 0.01 U 0.01 U 0.01 U 0.01 U 0.01 U 0.01 U 0.015 U 0.01 U 0.01 U 0.0088On-site SB-2-0' 0 10/15/2008 -- -- 0.015 U 0.03 U 0.01 U 0.01 U 0.01 U 0.01 U 0.01 U 0.01 U 0.01 U 0.01 U 0.01 U 0.01 U 0.01 U 0.015 U 0.01 U 0.01 0.0088On-site SB-2-0' (DUP-6) 0 10/15/2008 -- -- 0.015 U 0.03 U 0.01 U 0.013 0.03 0.026 0.039 0.01 U 0.016 0.01 U 0.07 0.01 U 0.036 0.015 U 0.053 0.082 0.040On-site SB-2-3' 3 10/15/2008 -- -- 0.015 0.03 U 0.01 U 0.01 U 0.01 U 0.01 U 0.01 U 0.01 U 0.01 U 0.01 U 0.01 U 0.01 U 0.01 U 0.016 0.01 U 0.01 U 0.0088On-site SB-2-6' 6 10/15/2008 -- -- 0.015 U 0.03 U 0.01 U 0.01 U 0.01 U 0.01 U 0.01 U 0.01 U 0.01 U 0.01 U 0.01 U 0.01 U 0.01 U 0.015 U 0.01 U 0.01 U 0.0088On-site SB-2-9' 9 10/15/2008 -- -- 0.015 U 0.03 U 0.01 U 0.019 0.076 0.055 0.091 0.022 0.023 0.01 U 0.058 0.01 U 0.088 0.015 U 0.01 U 0.068 0.096On-site SB-5-0' 0 10/15/2008 -- -- 1.5 U 3 U 1.7 12 20 29 37 8.7 22 1 U 71 1 U 38 1.4 41 62 29On-site SB-5-6' 6 10/15/2008 -- -- 0.015 U 0.03 U 0.01 U 0.01 U 0.01 U 0.01 U 0.011 0.01 U 0.01 U 0.01 U 0.028 0.01 U 0.01 0.02 0.033 0.033 0.0093On-site SB-5-9' 9 10/15/2008 -- -- 0.015 U 0.03 U 0.01 U 0.01 U 0.01 U 0.01 U 0.01 U 0.01 U 0.01 U 0.01 U 0.016 0.01 U 0.01 U 0.042 0.021 0.02 0.0088On-site SB-6-7.5' 7.5 10/14/2008 -- -- 1.5 U 3 U 1 U 2.1 5.6 4.4 6.6 1.6 3.7 1 U 14 1 U 6 12 13 16 7.2On-site SB-6-9.5' 9.5 10/14/2008 -- -- 30 U 60 U 20 U 20 U 42 27 37 20 U 30 20 U 120 20 U 34 790 170 140 54On-site SB-7-0' 0 10/15/2008 -- -- 7.5 U 20 13 39 69 68 80 30 54 12 280 10 84 180 220 300 96On-site SB-7-3' 3 10/15/2008 -- -- 0.075 U 0.15 U 0.05 U 0.2 0.44 0.41 0.68 0.17 0.27 0.05 U 1.2 0.05 U 0.58 0.42 0.91 1.5 0.59On-site SB-7-6' 6 10/15/2008 -- -- 3 U 6 U 3.3 12 24 24 38 9.4 17 4.2 81 2.5 31 27 70 97 33On-site SB-7-6' (DUP-4) 6 10/15/2008 -- -- 0.15 U 0.3 U 0.15 0.53 1.1 1.1 1.4 0.44 0.7 0.1 U 3.1 0.1 U 1.5 1.4 2.7 3.8 1.5On-site SB-7-9' 9 10/15/2008 -- -- 0.016 0.03 U 0.01 U 0.01 U 0.01 U 0.01 U 0.01 U 0.01 U 0.01 U 0.01 U 0.01 U 0.01 U 0.01 U 0.048 0.01 U 0.014 0.0088On-site SB-8-0' 0 10/15/2008 -- -- 0.075 U 2.1 0.05 U 0.05 U 0.05 U 0.05 U 0.05 U 0.05 U 0.05 U 0.05 U 0.089 0.05 U 0.05 U 0.075 U 0.05 U 0.099 0.044On-site SB-8-3' 3 10/15/2008 -- -- 0.015 U 0.061 0.01 U 0.01 U 0.01 U 0.01 U 0.01 U 0.01 U 0.01 U 0.01 U 0.01 U 0.01 U 0.01 U 0.015 U 0.01 U 0.01 U 0.0088On-site SB-8-5.5' 5.5 10/15/2008 -- -- 9.6 7.5 U 7 17 41 35 57 14 23 2.5 U 100 4.5 50 67 89 130 53On-site SB-8-6' 6 10/15/2008 -- -- 0.015 U 0.03 U 0.01 U 0.01 U 0.033 0.012 0.29 0.01 U 0.01 U 0.01 U 0.024 0.01 U 0.01 U 0.015 U 0.023 0.034 0.037On-site SB-8-9' 9 10/15/2008 -- -- 0.037 0.03 U 0.01 U 0.01 U 0.01 U 0.01 U 0.01 U 0.01 U 0.01 U 0.01 U 0.09 0.01 U 0.01 U 0.015 U 0.012 0.14 0.0088On-site SB-9-0' 0 10/13/2008 -- -- 0.3 U 0.6 U 0.26 1.5 3.6 3.3 5 1.4 2 0.3 7.5 0.2 U 4.7 0.52 4.5 9.3 4.8On-site SB-9-3' 3 10/13/2008 -- -- 0.015 U 0.03 U 0.01 U 0.03 0.1 0.093 0.16 0.034 0.037 0.022 0.11 0.01 0.15 0.027 0.022 0.14 0.14On-site SB-9-3' (DUP-1) 3 10/13/2008 -- -- 0.015 U 0.03 U 0.01 U 0.01 U 0.03 0.03 0.06 0.01 U 0.013 0.01 U 0.028 0.01 U 0.046 0.015 U 0.01 U 0.048 0.040On-site SB-9-6' 6 10/13/2008 -- -- 0.075 U 0.15 U 0.05 U 0.28 0.89 0.8 1.5 0.28 0.31 0.05 U 1.1 0.05 U 1.2 0.2 0.55 1.5 1.2On-site SB-9-9' 9 10/13/2008 -- -- 0.015 U 0.03 U 0.01 U 0.01 U 0.011 0.01 0.017 0.01 U 0.01 U 0.01 U 0.023 0.01 U 0.016 0.041 0.015 0.023 0.016On-site SB-9-9' (DUP-2) 9 10/13/2008 -- -- 0.015 U 0.033 0.011 0.065 0.16 0.15 0.29 0.061 0.12 0.01 U 0.47 0.011 0.24 0.21 0.26 0.53 0.21On-site SB-10-1.5' 1.5 10/15/2008 -- -- 0.75 U 1.5 U 0.5 U 1.3 2.4 2.4 3.5 0.83 1.6 0.5 U 8.1 0.5 U 3.1 2.7 7.1 10 3.26On-site SB-10-3' 3 10/15/2008 -- -- 0.015 U 0.052 0.01 U 0.072 0.37 0.3 0.47 0.1 0.095 0.01 U 0.25 0.01 U 0.44 0.015 U 0.031 0.4 0.46On-site SB-10-3' (DUP-5) 3 10/15/2008 -- -- 0.036 0.039 0.01 U 0.098 0.41 0.32 0.56 0.12 0.014 0.058 0.31 0.01 U 0.49 0.031 0.05 0.46 0.53On-site SB-10-6' 6 10/15/2008 -- -- 0.029 0.03 U 0.01 U 0.097 0.32 0.25 0.42 0.09 0.11 0.04 0.32 0.01 U 0.38 0.018 0.061 0.47 0.42On-site SB-10-9' 9 10/15/2008 -- -- 0.015 U 0.03 U 0.01 U 0.01 U 0.01 U 0.01 U 0.043 0.01 U 0.01 U 0.01 U 0.01 U 0.01 U 0.01 U 0.22 0.01 U 0.01 U 0.0088On-site SB-13-0' 0 10/13/2008 -- -- 7.5 U 15 U 11 44 68 70 78 33 53 5.4 190 6.4 87 19 120 220 94On-site SB-13-3' 3 10/13/2008 -- -- 3 U 6 U 3.3 13 20 21 21 9.5 16 4.4 66 2 U 24 3.4 44 72 28On-site SB-13-6' 6 10/13/2008 -- -- 0.015 U 0.03 U 0.01 U 0.01 U 0.01 U 0.01 U 0.01 U 0.01 U 0.01 U 0.01 U 0.01 U 0.01 U 0.01 U 0.015 U 0.01 U 0.01 U 0.0088
Att_A_Tables_Lodi Page 1 of 7 IRIS ENVIROMENTAL
TABLE A-2ANALYTICAL DATA INCLUDED IN THE HRA - SOILS (0-10 FEET BGS)
POLYCYCLIC AROMATIC HYDROCARBONSFormer Lodi Manufactured Gas Plant
Lodi, California
Loc
atio
n
Sam
ple
ID
Dep
th (f
eet b
gs)
Sam
ple
Dat
e
1-M
ethy
lnap
htha
lene
2-M
ethy
lnap
htha
lene
Ace
naph
then
e
Ace
naph
thyl
ene
Ant
hrac
ene
Ben
z(a)
anth
race
ne
Ben
z(a)
pyre
ne
Ben
z(b)
fluor
anth
ene
Ben
z(g,
h,i)p
eryl
ene
Ben
z(k)
fluor
anth
ene
Chr
ysen
e
Dib
enz(
a,h)
anth
race
ne
Fluo
rant
hene
Fluo
rene
Inde
n(1,
2,3-
cd)p
yren
e
Nap
htha
lene
Phen
anth
rene
Pyre
ne
B(a
)P E
quiv
alen
t
On-site SB-13-9' 9 10/13/2008 -- -- 0.015 U 0.03 U 0.01 U 0.01 U 0.01 U 0.01 U 0.01 U 0.01 U 0.01 U 0.01 U 0.01 U 0.01 U 0.01 U 0.015 U 0.01 U 0.01 U 0.0088On-site SB-14-0' 0 10/13/2008 -- -- 0.084 0.2 0.13 0.69 1.6 1.6 2.7 0.57 1 0.14 3.9 0.096 2.5 0.68 2.5 4.6 2.2On-site SB-14-2' 2 10/13/2008 -- -- 12 60 22 38 66 54 63 23 46 5 U 200 20 59 510 250 240 85On-site SB-14-3' 3 10/13/2008 -- -- 7.5 U 50 19 32 55 45 49 20 41 5 U 180 16 51 460 210 200 71On-site SB-14-6' 6 10/13/2008 -- -- 7.5 U 15 U 5.4 8.3 15 12 15 5 U 9.8 5 U 45 5 U 14 170 57 51 20On-site SB-14-9' 9 10/13/2008 -- -- 0.015 U 0.03 U 0.01 U 0.01 U 0.01 U 0.01 U 0.01 U 0.01 U 0.01 U 0.01 U 0.01 U 0.01 U 0.01 U 0.015 U 0.01 U 0.01 U 0.0088On-site SB-15-0' 0 10/13/2008 -- -- 1.6 3 U 2.4 6.1 11 10 13 4.6 7.9 1 U 39 1.1 13 4.1 28 39 15On-site SB-15-3' 3 10/13/2008 -- -- 0.75 U 1.5 U 0.52 3.8 7.2 7.6 11 3.3 5.3 0.75 18 0.5 U 11 3 12 21 10On-site SB-15-6' 6 10/13/2008 -- -- 0.75 U 1.5 U 0.5 U 0.93 1.8 1.9 3.1 0.67 1.3 0.5 U 4.9 0.5 U 2.5 0.75 U 3.6 5.9 2.5On-site SB-15-9' 9 10/13/2008 -- -- 0.03 U 0.079 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.03 U 0.02 U 0.02 U 0.018On-site SB-16-1' 1 10/13/2008 -- -- 0.75 U 1.5 U 1.2 5.7 12 12 17 4.8 8.1 0.84 36 0.5 U 16 1.6 22 40 16On-site SB-16-3' 3 10/13/2008 -- -- 0.34 0.06 U 0.2 U 0.034 0.068 0.074 0.12 0.026 0.049 0.035 0.18 0.2 U 0.051 0.15 0.11 0.2 0.099On-site SB-16-6' 6 10/13/2008 -- -- 0.03 U 0.06 U 0.2 U 0.047 0.078 0.1 0.21 0.031 0.085 0.34 0.23 0.027 0.028 0.3 U 0.082 0.23 0.22On-site SB-16-9' 9 10/13/2008 -- -- 0.015 U 0.03 U 0.01 U 0.01 U 0.01 U 0.01 U 0.01 U 0.01 U 0.01 U 0.01 U 0.01 U 0.01 U 0.01 U 0.015 U 0.01 U 0.01 U 0.0088On-site SB-17-1' 1 11/5/2009 0.35 0.47 0.2 U 0.78 0.38 1.3 3 2.9 5.5 1.8 2 0.41 5.2 0.2 U 4 0.79 3.3 5.8 4.2On-site SB-18-0' 0 11/4/2009 5 U 5 U 5 U 7.7 5 U 23 33 57 140 37 38 5.1 100 5 U 100 11 66 130 57On-site SB-18-8' 8 11/4/2009 0.1 U 0.1 U 0.1 U 0.1 U 0.1 U 0.1 U 0.17 0.1 U 0.1 U 0.1 U 0.31 0.1 U 0.1 U 0.1 U 0.1 U 0.1 U 0.1 U 0.21 0.21On-site SB-19-5' 5 11/5/2009 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.018On-site SB-20-0' 0 11/4/2009 0.4 U 0.4 U 0.4 U 0.67 0.4 U 1.6 3.7 3.3 9.2 2.3 2.2 0.62 4.5 0.4 U 6 0.62 2.1 6.5 5.3On-site SB-21-0' 0 11/3/2009 0.04 U 0.04 U 0.04 U 0.04 U 0.04 U 0.16 0.3 0.3 0.52 0.19 0.23 0.04 U 0.58 0.04 U 0.35 0.054 0.39 0.57 0.41On-site SB-21-5' 5 11/2/2009 0.1 U 0.1 U 0.1 U 0.2 0.11 0.7 1 0.87 1.6 0.79 0.78 0.16 2.3 0.1 U 1.2 0.29 1.7 2.4 1.4On-site SB-21-10' 10 11/2/2009 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.018On-site SB-22-0' 0 11/2/2009 2 U 2 U 2 U 9.4 3.2 9.5 14 11 19 8.9 11 2 U 44 3.7 14 16 47 52 19On-site SB-22-5' 5 11/2/2009 0.2 U 0.2 U 0.2 U 0.47 0.22 1.2 1.9 1.6 3.6 1.2 1.3 0.2 U 3.7 0.2 U 2.6 0.46 3.1 4.9 2.6On-site SB-22-10' 10 11/2/2009 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.018On-site SB-23-0' 0 11/2/2009 2 U 2 U 2 U 2.7 2 U 9 17 22 46 13 13 2.4 34 2 U 35 3.4 14 40 26On-site SB-23-10' 10 11/2/2009 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.018On-site SB-24-0' 0 11/2/2009 0.1 U 0.1 U 0.1 U 0.11 0.1 U 0.21 0.38 0.32 0.74 0.27 0.26 0.1 U 0.75 0.1 U 0.54 0.1 0.55 0.88 0.53On-site SB-24-5' 5 11/2/2009 0.1 U 0.1 U 0.1 U 0.1 U 0.1 U 0.19 0.46 0.41 1.3 0.29 0.23 0.1 U 0.63 0.1 U 0.93 0.1 U 0.39 0.83 0.66On-site SB-24-10' 10 11/2/2009 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.018On-site SB-25-0' 0 11/2/2009 5 U 5 U 5 U 9.8 7.3 27 46 39 74 30 35 5 U 120 5 U 56 24 99 150 62On-site SB-25-5' 5 11/2/2009 0.02 U 0.02 U 0.02 U 0.024 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.018On-site SB-25-10' 10 11/2/2009 0.02 U 0.02 U 0.02 U 0.051 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.018On-site SB-34-0' 0 11/3/2009 2 U 2 U 2 U 2 U 2 U 8.4 14 11 21 9 9.8 2 U 25 2 U 17 3.6 16 34 19On-site SB-34-8' 8 11/3/2009 0.1 U 0.1 U 0.1 U 0.12 0.1 U 0.1 U 0.1 U 0.1 U 0.31 0.1 U 0.1 U 0.1 U 0.1 U 0.1 U 0.1 U 0.1 U 0.1 U 0.1 U 0.088On-site SB-48-1.5' 1.5 7/13/2010 4 U 4 U 4 U 11 12 25 72 42 83 35 36 8.2 96 4 U 57 9.6 71 120 91On-site SB-48-3' 3 7/13/2010 0.5 U 0.5 U 0.5 U 0.95 1.2 2.2 6 3.4 7.2 3.1 3 0.71 9.9 0.5 U 4.9 1.2 7.2 12 7.6On-site SB-48-6' 6 7/13/2010 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.018On-site SB-49-3' 3 7/13/2010 1 U 1 U 1 U 2.7 1.3 3.5 14 7.8 22 6.5 5.4 1.7 10 1 U 13 4.9 6.5 13 18On-site SB-49-4' 4 7/13/2010 1000 U 1000 1000 U 4100 2400 2000 3900 2200 3400 2200 2800 1000 U 9800 1400 2600 23000 13000 10000 4998On-site SB-49-6' 6 7/13/2010 0.02 U 0.02 U 0.02 U 0.13 0.079 0.1 0.21 0.12 0.16 0.1 0.15 0.021 0.49 0.042 0.12 0.17 0.65 0.54 0.26On-site SB-50-1.5' 1.5 7/13/2010 4 U 4 U 4 U 4 U 4 U 13 34 20 54 20 19 4 U 56 4 U 35 4 U 25 61 44On-site SB-50-3' 3 7/13/2010 0.02 U 0.02 U 0.02 U 0.033 0.02 U 0.034 0.076 0.047 0.12 0.046 0.046 0.02 U 0.13 0.02 U 0.077 0.02 U 0.049 0.17 0.10
Att_A_Tables_Lodi Page 2 of 7 IRIS ENVIROMENTAL
TABLE A-2ANALYTICAL DATA INCLUDED IN THE HRA - SOILS (0-10 FEET BGS)
POLYCYCLIC AROMATIC HYDROCARBONSFormer Lodi Manufactured Gas Plant
Lodi, California
Loc
atio
n
Sam
ple
ID
Dep
th (f
eet b
gs)
Sam
ple
Dat
e
1-M
ethy
lnap
htha
lene
2-M
ethy
lnap
htha
lene
Ace
naph
then
e
Ace
naph
thyl
ene
Ant
hrac
ene
Ben
z(a)
anth
race
ne
Ben
z(a)
pyre
ne
Ben
z(b)
fluor
anth
ene
Ben
z(g,
h,i)p
eryl
ene
Ben
z(k)
fluor
anth
ene
Chr
ysen
e
Dib
enz(
a,h)
anth
race
ne
Fluo
rant
hene
Fluo
rene
Inde
n(1,
2,3-
cd)p
yren
e
Nap
htha
lene
Phen
anth
rene
Pyre
ne
B(a
)P E
quiv
alen
t
On-site SB-50-6' 6 7/13/2010 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.018On-site SB-51-1.5' 1.5 7/13/2010 0.2 U 0.2 U 0.2 U 0.36 0.2 U 0.78 1.8 1.2 2.6 1.1 1.1 0.21 2.7 0.2 U 1.8 0.34 2.1 2.7 2.4On-site SB-51-3' 3 7/13/2010 0.02 U 0.02 U 0.02 U 0.086 0.046 0.18 0.45 0.28 0.59 0.25 0.28 0.062 0.6 0.02 U 0.41 0.27 0.53 0.82 0.59On-site SB-51-6.5' 6.5 7/13/2010 1000 U 1000 U 1000 U 1400 1000 U 3300 7600 4600 11000 4700 4400 1000 U 20000 1000 U 7500 1000 U 9600 21000 9824On-site SB-51-9' 9 7/13/2010 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.018On-site SB-52-1' 1 7/12/2010 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.043 0.14 0.086 0.24 0.07 0.057 0.02 0.13 0.02 U 0.15 0.02 U 0.041 0.19 0.18On-site SB-52-3' 3 7/12/2010 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.023 0.052 0.037 0.1 0.031 0.03 0.02 U 0.055 0.02 U 0.063 0.02 U 0.02 U 0.082 0.071On-site SB-52-6' 6 7/12/2010 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.018On-site SB-52-9' 9 7/12/2010 0.03 0.062 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.04 0.02 U 0.02 U 0.018On-site SB-53-0.5' 0.5 7/12/2010 0.04 U 0.04 U 0.04 U 0.04 U 0.04 U 0.04 U 0.073 0.059 0.28 0.05 0.052 0.04 U 0.14 0.04 U 0.13 0.04 U 0.087 0.16 0.11On-site SB-53-3' 3 7/13/2010 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.018On-site SB-53-6' 6 7/13/2010 0.04 U 0.04 U 0.04 U 0.054 0.04 U 0.1 0.25 0.21 0.53 0.15 0.17 0.04 U 0.5 0.04 U 0.33 0.04 U 0.25 0.45 0.34On-site SB-53-9' 9 7/13/2010 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.018On-site SB-54-1' 1 7/12/2010 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.038 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.023 0.02 U 0.02 U 0.02 U 0.019On-site SB-54-3' 3 7/12/2010 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.024 0.053 0.05 0.17 0.037 0.049 0.02 U 0.1 0.02 U 0.11 0.02 U 0.058 0.1 0.079On-site SB-54-6' 6 7/12/2010 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.018On-site SB-54-9' 9 7/12/2010 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.018On-site SB-55-1.5' 1.5 7/13/2010 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.024 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.021 0.018On-site SB-55-3' 3 7/13/2010 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.018On-site SB-55-6' 6 7/13/2010 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.018On-site SB-55-9' 9 7/13/2010 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.018On-site SB-56-0.5' 0.5 7/14/2010 4 U 4 U 4 U 6.2 4 U 15 26 25 43 22 26 4 U 69 4 U 32 4 U 39 63 36On-site SB-56-3' 3 7/14/2010 0.02 U 0.02 U 0.02 U 0.043 0.02 U 0.12 0.17 0.23 0.47 0.17 0.23 0.042 0.58 0.02 U 0.34 0.058 0.22 0.71 0.27On-site SB-56-6' 6 7/14/2010 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.023 0.035 0.045 0.099 0.03 0.041 0.02 U 0.11 0.02 U 0.069 0.02 U 0.038 0.14 0.056On-site SB-56-9' 9 7/14/2010 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.052 0.02 U 0.02 U 0.02 U 0.048 0.02 U 0.033 0.02 U 0.021 0.061 0.020On-site SB-62-0 0 9/22/2010 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.024 0.02 U 0.018On-site SB-62-5 5 9/22/2010 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.018On-site SB-62-10 10 9/22/2010 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.021 0.031 0.02 U 0.031 0.02 U 0.036 0.02 U 0.02 U 0.02 U 0.025 0.034 0.019On-site SB-63-1 1 9/23/2010 0.02 U 0.02 U 0.12 0.11 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.059 0.02 U 0.2 0.02 U 0.02 U 0.018On-site SB-63-5 5 9/23/2010 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.018On-site SB-63-10 10 9/23/2010 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.018On-site SB-64-1 1 9/22/2010 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.018On-site SB-64-5 5 9/22/2010 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.018On-site SB-64-10 10 9/22/2010 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.018On-site SB-65-1 1 9/23/2010 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.022 0.027 0.031 0.029 0.02 U 0.034 0.02 U 0.047 0.02 U 0.02 U 0.02 U 0.031 0.046 0.038On-site SB-65-5 5 9/23/2010 0.02 U 0.02 U 0.039 0.036 0.02 U 0.02 U 0.024 0.031 0.036 0.024 0.035 0.02 U 0.041 0.021 0.022 0.062 0.024 0.048 0.036On-site SB-65-10 10 9/23/2010 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.086 0.15 0.2 0.17 0.12 0.19 0.047 0.27 0.02 U 0.13 0.02 U 0.1 0.22 0.22On-site SB-66-0 0 9/23/2010 0.02 U 0.02 U 0.11 0.098 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.048 0.02 U 0.19 0.02 U 0.02 U 0.018On-site SB-66-5 5 9/23/2010 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.018On-site SB-66-10 10 9/23/2010 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.028 0.037 0.041 0.036 0.02 U 0.044 0.02 U 0.048 0.02 U 0.024 0.02 U 0.027 0.045 0.051On-site SB-67-0 0 9/23/2010 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.022 0.02 U 0.018On-site SB-67-5 5 9/23/2010 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.018On-site SB-67-10 10 9/23/2010 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.018
Att_A_Tables_Lodi Page 3 of 7 IRIS ENVIROMENTAL
TABLE A-2ANALYTICAL DATA INCLUDED IN THE HRA - SOILS (0-10 FEET BGS)
POLYCYCLIC AROMATIC HYDROCARBONSFormer Lodi Manufactured Gas Plant
Lodi, California
Loc
atio
n
Sam
ple
ID
Dep
th (f
eet b
gs)
Sam
ple
Dat
e
1-M
ethy
lnap
htha
lene
2-M
ethy
lnap
htha
lene
Ace
naph
then
e
Ace
naph
thyl
ene
Ant
hrac
ene
Ben
z(a)
anth
race
ne
Ben
z(a)
pyre
ne
Ben
z(b)
fluor
anth
ene
Ben
z(g,
h,i)p
eryl
ene
Ben
z(k)
fluor
anth
ene
Chr
ysen
e
Dib
enz(
a,h)
anth
race
ne
Fluo
rant
hene
Fluo
rene
Inde
n(1,
2,3-
cd)p
yren
e
Nap
htha
lene
Phen
anth
rene
Pyre
ne
B(a
)P E
quiv
alen
t
On-site SB-68-0 0 9/23/2010 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.018On-site SB-68-5 5 9/23/2010 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.018On-site SB-68-10 10 9/23/2010 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.018On-site SB-69-0 0 9/23/2010 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.029 0.02 U 0.02 U 0.02 U 0.022 0.027 0.018On-site SB-69-5 5 9/23/2010 0.02 U 0.02 U 0.063 0.05 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.036 0.02 U 0.039 0.02 U 0.02 U 0.018On-site SB-69-10 10 9/23/2010 0.02 U 0.021 0.023 0.02 U 0.024 0.028 0.029 0.027 0.032 0.029 0.033 0.025 0.031 0.031 0.029 0.035 0.042 0.036 0.049On-site SS-1 0 2/24/2006 -- 1.65 U 1.65 U 1.65 U 1.65 U 0.064 0.11 0.14 0.22 0.17 0.056 1.65 U 0.17 1.65 U 0.11 1.65 U 0.1 0.23 0.44On-site SS-2 0 2/24/2006 -- 0.18 0.043 0.76 0.34 2.4 4.7 7.4 8.6 9.1 4.1 0.71 9.4 0.091 5.9 0.54 5.2 12 7.5On-site SS-3 0 2/24/2006 -- 0.24 0.34 15 6.8 83 110 180 95 220 95 13 300 1.6 64 5 140 340 170On-site SS-4 0 2/24/2006 -- 0.59 0.27 5.8 3.6 11 18 23 11 4.5 14 1.5 43 2.1 8.8 5.1 45 49 23On-site SS-5 0 2/24/2006 -- 1.65 U 1.65 U 0.16 0.088 0.37 0.75 1 0.75 1.3 0.55 0.081 1.5 1.65 U 0.49 1.65 U 0.81 1.9 1.1On-site SS-6 0 2/24/2006 -- 0.33 U 0.33 U 0.33 U 0.33 U 0.33 U 0.33 U 0.33 U 0.33 U 0.33 U 0.33 U 0.33 U 0.33 U 0.33 U 0.33 U 0.33 U 0.33 U 0.33 U 0.29On-site SS-7 0 2/24/2006 -- 0.8 0.29 11 4.7 30 60 82 48 100 43 7 120 1.9 31 15 88 150 87On-site SS-8 0 2/24/2006 -- 0.22 0.092 3.9 1.7 13 29 46 28 57 19 3.4 40 0.66 14 3.3 23 51 43On-site SS-9 0 2/24/2006 -- 0.058 0.055 1.7 0.75 4 7.5 9 7.9 2.5 4.9 0.68 18 0.2 4.4 0.96 10 23 9.8On-site TP-1-0.5' 0.5 7/12/2010 0.02 U 0.02 U 0.02 U 0.026 0.02 U 0.054 0.12 0.13 0.22 0.078 0.098 0.02 U 0.26 0.02 U 0.15 0.02 U 0.12 0.33 0.17On-site TP-1-3' 3 7/12/2010 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 0.02 U 0.02 U 0.02 U 0.023 0.02 U 0.02 U 0.02 U 0.02 U 0.032 0.018On-site TP-1-6' 6 7/12/2010 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.018On-site TP-2-0.5' 0.5 7/12/2010 0.2 U 0.2 U 0.2 U 0.25 0.2 U 0.38 0.95 0.86 2.2 0.61 0.69 0.2 U 1.4 0.2 U 1.3 0.2 U 0.73 1.7 1.3On-site TP-2-3' 3 7/12/2010 0.02 U 0.02 U 0.02 U 0.024 0.02 U 0.048 0.12 0.12 0.23 0.071 0.085 0.02 U 0.18 0.02 U 0.15 0.02 U 0.065 0.23 0.16On-site TP-2-6' 6 7/12/2010 1 U 1 U 1 U 1 U 1 U 2.3 5.1 4 9.9 2.7 3.7 1 U 16 1 U 5.7 1 U 7.6 20 6.8On-site TP-2-9' 9 7/12/2010 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.048 0.02 U 0.02 U 0.02 U 0.028 0.02 U 0.029 0.02 U 0.02 U 0.035 0.019On-site TP-3-0.5' 0.5 7/12/2010 2 U 2 U 2 U 5.4 2 U 10 18 24 40 19 19 3.9 44 2 U 28 2 U 21 46 28On-site TP-3-3' 3 7/12/2010 0.1 U 0.1 U 0.1 U 0.11 0.1 U 0.33 0.55 0.76 1.3 0.57 0.64 0.12 1.3 0.1 U 0.93 0.1 U 0.49 1.4 0.86On-site TP-3-6' 6 7/12/2010 0.1 U 0.1 U 0.1 U 0.1 U 0.1 U 0.37 0.58 0.72 1.3 0.62 0.64 0.13 1.4 0.1 U 0.9 0.1 U 0.69 1.5 0.89On-site TP-4-0.5' 0.5 7/12/2010 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.028 0.023 0.043 0.02 U 0.02 0.02 U 0.039 0.02 U 0.029 0.02 U 0.02 U 0.055 0.039On-site TP-4-3' 3 7/12/2010 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.018On-site TP-4-6' 6 7/12/2010 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.018On-site TP-5-0.5' 0.5 7/13/2010 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.04 0.039 0.09 0.02 0.029 0.02 U 0.076 0.02 U 0.054 0.045 0.036 0.098 0.056On-site TP-5-3' 3 7/13/2010 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.018On-site TP-5-6' 6 7/13/2010 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.018On-site TP-6-0.5' 0.5 7/13/2010 0.4 U 0.4 U 0.4 U 0.4 U 0.4 U 0.86 2.1 1.5 3.6 1.3 1.4 0.4 U 4.3 0.4 U 2.3 0.4 U 2.5 4.8 2.8On-site TP-6-3' 3 7/13/2010 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.018On-site TP-6-6' 6 7/13/2010 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.025 0.02 U 0.02 U 0.02 U 0.022 0.02 U 0.02 U 0.02 U 0.02 U 0.027 0.018On-site TP-7-25S 1.17 7/12/2010 0.4 U 0.4 U 0.4 U 0.57 0.4 U 0.8 2.1 1.5 4.3 1.1 1.2 0.4 U 3.7 0.4 U 2.4 0.4 U 2.4 4.3 2.8On-site TP-7-25D 2.67 7/12/2010 0.2 U 0.2 U 0.2 U 0.25 0.2 U 0.39 1.2 0.86 2.5 0.61 0.62 0.2 U 2.1 0.2 U 1.4 0.28 1.2 2.7 1.6On-site TP-7-40S 1.17 7/12/2010 0.02 U 0.02 U 0.02 U 0.047 0.036 0.12 0.26 0.2 0.29 0.13 0.18 0.033 0.48 0.02 U 0.21 0.038 0.31 0.54 0.34On-site TP-7-40D 2.67 7/12/2010 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.029 0.046 0.02 U 0.02 U 0.02 U 0.031 0.02 U 0.03 0.02 U 0.02 U 0.038 0.021On-site TP-8-0.5' 0.5 7/13/2010 2 U 2 U 2 U 2.9 2.7 14 35 23 48 18 20 4.8 45 2 U 32 3.8 18 50 46On-site TP-8-3' 3 7/13/2010 0.02 U 0.02 U 0.02 U 0.046 0.027 0.2 0.39 0.31 0.47 0.25 0.3 0.055 0.61 0.02 U 0.34 0.031 0.19 0.73 0.52On-site TP-8-6' 6 7/13/2010 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.042 0.1 0.087 0.14 0.066 0.064 0.02 U 0.1 0.02 U 0.1 0.02 U 0.031 0.14 0.13On-site TP-9-0.5' 0.5 7/13/2010 2 U 2 U 2 U 2.4 2 U 13 42 27 67 21 19 5.4 44 2 U 41 2 U 8.4 54 54On-site TP-9-3' 3 7/13/2010 0.4 U 0.4 U 0.4 U 0.41 0.4 U 0.76 2.5 1.7 4.2 1.2 1.1 0.4 U 4 0.4 U 2.6 0.4 U 2.1 5 3.2
Att_A_Tables_Lodi Page 4 of 7 IRIS ENVIROMENTAL
TABLE A-2ANALYTICAL DATA INCLUDED IN THE HRA - SOILS (0-10 FEET BGS)
POLYCYCLIC AROMATIC HYDROCARBONSFormer Lodi Manufactured Gas Plant
Lodi, California
Loc
atio
n
Sam
ple
ID
Dep
th (f
eet b
gs)
Sam
ple
Dat
e
1-M
ethy
lnap
htha
lene
2-M
ethy
lnap
htha
lene
Ace
naph
then
e
Ace
naph
thyl
ene
Ant
hrac
ene
Ben
z(a)
anth
race
ne
Ben
z(a)
pyre
ne
Ben
z(b)
fluor
anth
ene
Ben
z(g,
h,i)p
eryl
ene
Ben
z(k)
fluor
anth
ene
Chr
ysen
e
Dib
enz(
a,h)
anth
race
ne
Fluo
rant
hene
Fluo
rene
Inde
n(1,
2,3-
cd)p
yren
e
Nap
htha
lene
Phen
anth
rene
Pyre
ne
B(a
)P E
quiv
alen
t
On-site TP-9-6' 6 7/13/2010 0.1 U 0.1 U 0.1 U 0.1 U 0.1 U 0.24 0.52 0.32 0.71 0.29 0.33 0.1 U 0.72 0.1 U 0.46 0.1 U 0.18 0.89 0.67On-site TP-9-9' 9 7/13/2010 0.1 U 0.1 U 0.1 U 0.13 0.1 U 0.2 0.63 0.38 0.93 0.27 0.3 0.1 U 1.2 0.1 U 0.55 0.34 0.66 1.6 0.79On-site TP-10-0.5' 0.5 7/13/2010 0.02 U 0.02 U 0.02 U 0.054 0.02 U 0.076 0.17 0.13 0.23 0.087 0.12 0.02 0.4 0.02 U 0.16 0.029 0.24 0.49 0.22On-site TP-10-3' 3 7/13/2010 0.2 U 0.2 U 0.2 U 0.21 0.2 U 0.42 1.3 0.94 2.5 0.59 0.67 0.2 U 1.9 0.2 U 1.5 0.2 U 0.5 2.3 1.7On-site TP-10-6' 6 7/13/2010 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.038 0.12 0.09 0.23 0.057 0.059 0.02 U 0.19 0.02 U 0.14 0.02 U 0.037 0.25 0.16On-site TP-11-0.5' 0.5 7/13/2010 4 U 4 U 4 U 4 U 4 U 30 68 47 84 42 46 9.4 80 4 U 59 5.8 22 95 89On-site TP-11-3' 3 7/13/2010 1 U 1 U 1 U 2.5 1 U 6.8 24 17 45 12 11 3 23 1 U 26 1.2 4.1 30 31On-site TP-11-6' 6 7/13/2010 0.2 U 0.2 U 0.2 U 0.43 0.2 U 0.55 1.5 1.1 2.4 0.85 0.86 0.2 U 2 0.2 U 1.5 0.2 U 0.78 2.4 1.9On-site TP-11-9' 9 7/13/2010 0.4 U 0.4 U 0.4 U 1.7 0.56 2 3.7 2.5 4.1 2.3 2.8 0.47 8.1 0.41 2.9 1.5 8.5 8.8 4.9
LIW Property SB-35-0' 0 11/9/2009 0.5 U 0.5 U 0.5 U 0.86 0.5 U 4.1 7.6 6 12 5 5.3 1.1 11 0.5 U 9.5 2.1 7.3 15 10LIW Property SB-35-3' 3 11/9/2009 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.04 0.07 0.058 0.13 0.056 0.049 0.02 U 0.085 0.02 U 0.1 0.02 U 0.053 0.15 0.10LIW Property SB-35-6' 6 11/9/2009 0.02 U 0.02 U 0.044 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.018LIW Property SB-35-9' 9 11/9/2009 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.018LIW Property SB-36-0' 0 11/9/2009 0.13 0.18 0.1 U 0.1 U 0.1 U 0.17 0.29 0.32 0.66 0.26 0.23 0.1 U 0.33 0.1 U 0.49 1.3 0.24 0.49 0.43LIW Property SB-36-3' 3 11/9/2009 0.1 U 0.1 U 0.1 U 0.1 U 0.1 U 0.24 0.51 0.54 1.2 0.39 0.34 0.1 U 0.54 0.1 U 0.94 0.1 0.22 0.78 0.74LIW Property SB-36-6' 6 11/9/2009 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.018LIW Property SB-36-9' 9 11/9/2009 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.018LIW Property SB-37-0' 0 11/9/2009 0.36 0.57 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 5.8 0.21 0.2 U 0.18LIW Property SB-37-3' 3 11/9/2009 0.4 U 0.4 U 0.4 U 0.4 U 0.4 U 1.1 2.3 2.7 4.5 1.5 1.8 0.4 U 2.8 0.4 U 3.6 0.66 0.71 4.1 3.3LIW Property SB-37-6' 6 11/9/2009 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.028 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.028 0.04 0.02 U 0.028 0.019LIW Property SB-37-9' 9 11/9/2009 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.018LIW Property SB-38-0' 0 11/9/2009 0.4 U 0.49 0.4 U 0.4 U 0.4 U 0.98 1.3 1 1.1 1.3 1.4 0.4 U 1.4 0.4 U 1.2 5 1.2 1.7 1.8LIW Property SB-38-3' 3 11/9/2009 0.02 U 0.022 0.02 U 0.023 0.02 U 0.1 0.2 0.19 0.3 0.16 0.14 0.02 U 0.17 0.02 U 0.24 0.16 0.067 0.26 0.27LIW Property SB-38-6' 6 11/9/2009 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.018LIW Property SB-38-9' 9 11/9/2009 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.018LIW Property SB-39-0' 0 11/9/2009 0.2 U 0.24 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 2.2 0.2 0.22 0.18LIW Property SB-39-3' 3 11/9/2009 0.024 0.035 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.025 0.02 U 0.02 U 0.36 0.027 0.032 0.018LIW Property SB-39-6' 6 11/9/2009 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.018LIW Property SB-39-9' 9 11/9/2009 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.018LIW Property SB-39-9' (DUP-6) 9 11/9/2009 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.018LIW Property SB-40-0' 0 11/10/2009 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.032 0.052 0.051 0.063 0.041 0.047 0.02 U 0.035 0.02 U 0.053 0.02 U 0.024 0.044 0.074LIW Property SB-40-3' 3 11/10/2009 0.02 U 0.02 U 0.02 U 0.023 0.02 U 0.04 0.092 0.06 0.31 0.061 0.051 0.02 U 0.12 0.02 U 0.14 0.039 0.041 0.11 0.13LIW Property SB-40-6' 6 11/10/2009 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.018LIW Property SB-40-9' 9 11/10/2009 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.018LIW Property SB-41-0' 0 11/10/2009 0.11 0.16 0.02 U 0.02 U 0.02 U 0.056 0.093 0.084 0.093 0.076 0.08 0.02 U 0.076 0.02 U 0.083 1.4 0.1 0.083 0.13LIW Property SB-41-3' 3 11/10/2009 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.026 0.02 U 0.02 U 0.02 U 0.03 0.02 U 0.02 U 0.037 0.029 0.043 0.018LIW Property SB-41-6' 6 11/10/2009 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.018LIW Property SB-41-9' 9 11/10/2009 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.018LIW Property SB-42-0' 0 11/10/2009 0.065 0.09 0.02 U 0.02 U 0.02 U 0.042 0.074 0.072 0.082 0.065 0.058 0.02 U 0.037 0.02 U 0.077 0.12 0.046 0.047 0.10LIW Property SB-42-3' 3 11/10/2009 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.018LIW Property SB-42-6' 6 11/10/2009 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.018LIW Property SB-42-9' 9 11/10/2009 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.018LIW Property SB-43-0' 0 11/10/2009 0.2 U 0.2 U 0.2 U 0.5 0.46 2.1 3.9 3.3 5.3 2.8 2.8 0.5 6.6 0.2 U 4.3 0.86 5 8.1 5.3
Att_A_Tables_Lodi Page 5 of 7 IRIS ENVIROMENTAL
TABLE A-2ANALYTICAL DATA INCLUDED IN THE HRA - SOILS (0-10 FEET BGS)
POLYCYCLIC AROMATIC HYDROCARBONSFormer Lodi Manufactured Gas Plant
Lodi, California
Loc
atio
n
Sam
ple
ID
Dep
th (f
eet b
gs)
Sam
ple
Dat
e
1-M
ethy
lnap
htha
lene
2-M
ethy
lnap
htha
lene
Ace
naph
then
e
Ace
naph
thyl
ene
Ant
hrac
ene
Ben
z(a)
anth
race
ne
Ben
z(a)
pyre
ne
Ben
z(b)
fluor
anth
ene
Ben
z(g,
h,i)p
eryl
ene
Ben
z(k)
fluor
anth
ene
Chr
ysen
e
Dib
enz(
a,h)
anth
race
ne
Fluo
rant
hene
Fluo
rene
Inde
n(1,
2,3-
cd)p
yren
e
Nap
htha
lene
Phen
anth
rene
Pyre
ne
B(a
)P E
quiv
alen
t
LIW Property SB-43-3' 3 11/10/2009 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.034 0.031 0.058 0.024 0.023 0.02 U 0.044 0.02 U 0.044 0.02 U 0.02 U 0.061 0.049LIW Property SB-43-6' 6 11/10/2009 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.018LIW Property SB-43-9' 9 11/10/2009 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.018LIW Property SB-44-0' 0 11/10/2009 0.15 0.24 0.02 U 0.02 U 0.02 U 0.026 0.029 0.036 0.03 0.032 0.042 0.02 U 0.043 0.02 U 0.029 1.3 0.1 0.045 0.045LIW Property SB-44-3' 3 11/10/2009 0.02 U 0.02 U 0.02 U 0.045 0.02 U 0.059 0.16 0.17 0.34 0.11 0.093 0.02 U 0.13 0.02 U 0.26 0.078 0.049 0.16 0.22LIW Property SB-44-6' 6 11/10/2009 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.018LIW Property SB-44-9' 9 11/10/2009 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.018LIW Property SB-45-0' 0 11/10/2009 0.55 0.81 0.02 U 0.02 U 0.04 0.055 0.086 0.088 0.069 0.081 0.085 0.02 U 0.1 0.04 0.073 6.9 0.28 0.087 0.12LIW Property SB-45-3' 3 11/10/2009 0.02 U 0.021 0.02 U 0.02 U 0.02 U 0.03 0.063 0.073 0.093 0.049 0.046 0.02 U 0.064 0.02 U 0.078 0.24 0.025 0.087 0.090LIW Property SB-45-6' 6 11/10/2009 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.018LIW Property SB-45-9' 9 11/10/2009 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.018LIW Property SB-46-0' 0 11/10/2009 0.1 U 0.14 0.1 U 0.1 U 0.1 U 0.17 0.3 0.29 0.31 0.28 0.27 0.1 U 0.19 0.1 U 0.32 1.1 0.16 0.23 0.43LIW Property SB-46-3' 3 11/10/2009 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.055 0.02 U 0.02 U 0.018LIW Property SB-46-6' 6 11/10/2009 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.018LIW Property SB-46-9' 9 11/10/2009 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.018Off-site ROW SB-3-0' 0 10/14/2008 -- -- 0.075 U 0.15 U 0.05 U 0.19 0.37 0.35 0.62 0.19 0.34 0.05 U 0.65 0.05 U 0.56 0.57 0.34 0.79 0.51Off-site ROW SB-3-3' 3 10/14/2008 -- -- 0.075 U 0.15 U 0.05 U 0.1 0.23 0.22 0.34 0.066 0.2 0.05 U 0.41 0.05 U 0.33 0.23 0.11 0.44 0.31Off-site ROW SB-3-6' 6 10/14/2008 -- -- 0.075 U 0.15 U 0.05 U 0.15 0.38 0.33 0.59 0.14 0.27 0.05 U 0.87 0.05 U 0.53 0.35 0.49 1 0.51Off-site ROW SB-3-9' 9 10/14/2008 -- -- 0.015 U 0.03 U 0.01 U 0.01 U 0.01 U 0.01 U 0.01 U 0.01 U 0.01 U 0.01 U 0.062 0.01 U 0.01 U 0.015 U 0.01 U 0.01 U 0.0088Off-site ROW SB-3-9' (DUP-3) 9 10/14/2008 -- -- 0.015 U 0.03 U 0.01 U 0.01 U 0.01 U 0.01 U 0.01 U 0.01 U 0.01 U 0.01 U 0.01 U 0.01 U 0.01 U 0.015 U 0.01 U 0.01 U 0.0088Off-site ROW SB-4-0' 0 10/14/2008 -- -- 0.03 U 0.06 U 0.027 0.33 0.73 0.67 1.1 0.25 0.6 0.02 U 1.4 0.02 U 0.98 0.14 0.45 1.4 0.96Off-site ROW SB-4-3' 3 10/14/2008 -- -- 0.075 U 0.15 U 0.05 U 0.24 0.44 0.54 0.88 0.17 0.48 0.05 U 0.98 0.05 U 0.85 0.54 0.4 1.2 0.63Off-site ROW SB-4-6' 6 10/14/2008 -- -- 0.15 U 0.3 U 0.1 U 0.1 U 0.15 0.14 0.25 0.1 U 0.3 0.1 U 0.24 0.1 U 0.22 0.15 U 0.13 0.33 0.22Off-site ROW SB-4-7' 7 10/14/2008 -- -- 0.3 U 0.6 U 0.2 U 1.6 2.8 3 4.1 1.2 2.4 0.2 U 6.3 0.2 U 3.8 0.95 2.9 6.4 3.8Off-site ROW SB-4-9' 9 10/14/2008 -- -- 0.015 U 0.03 U 0.01 U 0.01 U 0.01 U 0.01 U 0.01 U 0.01 U 0.01 U 0.01 U 0.073 0.01 U 0.01 U 0.015 U 0.01 U 0.01 U 0.0088Off-site ROW SB-11-0' 0 10/14/2008 -- -- 0.15 U 0.3 U 0.1 U 0.47 1.1 1 1.8 0.4 0.88 0.1 U 2.1 0.1 U 1.6 0.24 1.1 2.2 1.5Off-site ROW SB-11-3' 3 10/14/2008 -- -- 0.015 U 0.03 U 0.01 U 0.01 U 0.021 0.019 0.034 0.01 U 0.014 0.01 U 0.029 0.01 U 0.029 0.028 0.01 U 0.036 0.029Off-site ROW SB-11-6' 6 10/14/2008 -- -- 0.015 U 0.03 U 0.01 U 0.01 U 0.01 U 0.022 0.038 0.01 U 0.022 0.01 U 0.037 0.01 U 0.02 0.034 0.025 0.038 0.012Off-site ROW SB-11-9' 9 10/14/2008 -- -- 0.015 U 0.03 U 0.01 U 0.01 U 0.01 U 0.01 U 0.01 U 0.01 U 0.01 U 0.01 U 0.01 U 0.01 U 0.01 U 0.015 U 0.01 U 0.01 U 0.0088Off-site ROW SB-12-0' 0 10/14/2008 -- -- 0.15 U 0.3 U 0.1 U 0.41 1 0.86 1.8 0.34 0.73 0.1 U 2 0.1 U 1.4 0.4 1 2 1.3Off-site ROW SB-12-1.5' 1.5 10/14/2008 -- -- 0.015 U 0.03 U 0.01 U 0.01 U 0.01 U 0.01 U 0.01 U 0.01 U 0.01 U 0.01 U 0.01 U 0.01 U 0.01 U 0.015 U 0.01 U 0.01 U 0.0088Off-site ROW SB-12-3' 3 10/14/2008 -- -- 1.5 U 3 U 2.1 12 27 24 39 12 19 1 U 31 1.3 37 6.8 32 47 36Off-site ROW SB-12-6' 6 10/14/2008 -- -- 0.3 U 0.83 0.5 2.9 6.5 5.6 8.2 1.9 5.1 0.28 7.9 0.25 7.6 2.6 7.3 13 8.4Off-site ROW SB-12-9' 9 10/14/2008 -- -- 0.15 U 0.3 U 0.1 U 0.25 0.58 0.46 0.77 0.13 0.43 0.1 U 1.2 0.1 U 0.78 0.71 1.1 1.3 0.76Off-site ROW SB-26-0.5' 0.5 11/5/2009 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.018Off-site ROW SB-26-5' 5 11/5/2009 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.018Off-site ROW SB-27-0.5' 0.5 11/5/2009 0.02 U 0.02 U 0.02 U 0.24 0.02 U 0.95 1.4 1 1.6 1.1 1.3 0.02 U 3.7 0.02 U 1.4 0.02 U 3.8 4.6 1.9Off-site ROW SB-27-10' (DUP-5) 10 11/5/2009 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.018Off-site ROW SB-27-5' 5 11/5/2009 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.018Off-site ROW SB-28-0.5' 0.5 11/5/2009 0.02 U 0.02 U 0.02 U 0.066 0.04 0.25 0.44 0.36 0.67 0.34 0.33 0.069 0.6 0.02 U 0.56 0.051 0.3 0.84 0.62Off-site ROW SB-28-8' 8 11/5/2009 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.018Off-site ROW SB-29-0.5' 0.5 11/4/2009 0.02 U 0.02 U 0.02 U 0.1 0.02 U 0.078 0.16 0.14 0.31 0.14 0.11 0.02 U 0.19 0.02 U 0.24 0.02 U 0.065 0.27 0.22Off-site ROW SB-29-5' 5 11/4/2009 0.02 U 0.02 U 0.032 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.018
Att_A_Tables_Lodi Page 6 of 7 IRIS ENVIROMENTAL
TABLE A-2ANALYTICAL DATA INCLUDED IN THE HRA - SOILS (0-10 FEET BGS)
POLYCYCLIC AROMATIC HYDROCARBONSFormer Lodi Manufactured Gas Plant
Lodi, California
Loc
atio
n
Sam
ple
ID
Dep
th (f
eet b
gs)
Sam
ple
Dat
e
1-M
ethy
lnap
htha
lene
2-M
ethy
lnap
htha
lene
Ace
naph
then
e
Ace
naph
thyl
ene
Ant
hrac
ene
Ben
z(a)
anth
race
ne
Ben
z(a)
pyre
ne
Ben
z(b)
fluor
anth
ene
Ben
z(g,
h,i)p
eryl
ene
Ben
z(k)
fluor
anth
ene
Chr
ysen
e
Dib
enz(
a,h)
anth
race
ne
Fluo
rant
hene
Fluo
rene
Inde
n(1,
2,3-
cd)p
yren
e
Nap
htha
lene
Phen
anth
rene
Pyre
ne
B(a
)P E
quiv
alen
t
Off-site ROW SB-29-10' 10 11/4/2009 0.02 U 0.02 U 0.035 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.018Off-site ROW SB-30-0.5' 0.5 11/4/2009 0.02 U 0.02 U 0.02 U 0.061 0.029 0.2 0.46 0.36 0.74 0.32 0.29 0.067 0.45 0.02 U 0.57 0.086 0.19 0.63 0.63Off-site ROW SB-30-5' 5 11/4/2009 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.018Off-site ROW SB-30-5' (DUP-3) 5 11/4/2009 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.028 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.022 0.02 U 0.02 U 0.027 0.019Off-site ROW SB-30-10' 10 11/4/2009 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.018Off-site ROW SB-31-0.5' 0.5 11/4/2009 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.037 0.06 0.062 0.12 0.049 0.043 0.02 U 0.1 0.02 U 0.083 0.026 0.047 0.15 0.087Off-site ROW SB-31-5' 5 11/4/2009 0.02 U 0.02 U 0.03 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.018Off-site ROW SB-31-10' 10 11/4/2009 0.02 U 0.02 U 0.021 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.018Off-site ROW SB-32-0.5' 0.5 11/4/2009 0.02 U 0.02 U 0.02 U 0.039 0.04 0.14 0.26 0.26 0.55 0.22 0.22 0.02 U 0.57 0.02 U 0.38 0.02 U 0.4 0.76 0.37Off-site ROW SB-32-5' 5 11/4/2009 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.032 0.055 0.057 0.1 0.038 0.04 0.02 U 0.13 0.02 U 0.064 0.02 U 0.076 0.14 0.078Off-site ROW SB-32-10' 10 11/4/2009 0.02 U 0.02 U 0.045 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.018Off-site ROW SB-33-0.5' 0.5 11/4/2009 10 U 10 U 10 U 41 10 U 78 110 83 150 85 110 16 290 10 U 120 49 340 350 153Off-site ROW SB-33-5' 5 11/4/2009 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.018Off-site ROW SB-33-10' 10 11/4/2009 0.02 U 0.02 U 0.029 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.018Off-site ROW SB-47-0.5' 0.5 7/15/2010 1 U 1 U 1 U 2.3 1.3 9.1 18 19 35 14 16 2.4 39 1 U 23 1.2 22 47 25Off-site ROW SB-47-3' 3 7/15/2010 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.051 0.12 0.14 0.35 0.11 0.11 0.021 0.21 0.02 U 0.23 0.02 U 0.076 0.24 0.18Off-site ROW SB-47-6' 6 7/15/2010 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.018Off-site ROW SB-58-0 0 9/22/2010 0.02 U 0.021 0.02 U 0.02 U 0.02 U 0.046 0.052 0.046 0.024 0.052 0.052 0.02 U 0.02 U 0.02 U 0.022 0.02 U 0.02 0.025 0.073Off-site ROW SB-58-5 5 9/22/2010 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.018Off-site ROW SB-58-10 10 9/22/2010 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.018Off-site ROW SB-59-3 3 9/22/2010 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.025 0.02 U 0.02 U 0.02 U 0.02 U 0.027 0.018Off-site ROW SB-59-5 5 9/22/2010 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.041 0.02 U 0.02 U 0.02 U 0.02 U 0.075 0.018Off-site ROW SB-59-10 10 9/22/2010 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.052 0.056 0.069 0.076 0.059 0.069 0.02 U 0.085 0.02 U 0.045 0.02 U 0.041 0.22 0.083Off-site ROW SB-60-0 0 9/22/2010 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.018Off-site ROW SB-60-5 5 9/22/2010 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 0.02 U 0.032 0.02 U 0.026 0.02 U 0.02 U 0.02 U 0.027 0.03 0.018Off-site ROW SB-60-10 10 9/22/2010 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.018Off-site ROW SB-61-0 0 9/22/2010 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.018Off-site ROW SB-61-5 5 9/22/2010 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.021 0.02 U 0.022 0.02 U 0.026 0.02 U 0.02 U 0.02 U 0.02 U 0.025 0.018Off-site ROW SB-61-10 10 9/22/2010 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U 0.025 0.02 U 0.02 U 0.038 0.02 U 0.02 U 0.02 U 0.15 0.018
Notes:Samples SHADED GRAY are included in the exposed soils (0-0.5 feet bgs) dataset.All analytical results are presented in milligrams per kilogram (mg/kg).-- = not analyzed for. bgs = below ground surfaceDUP = field duplicate sample.LIW = Lodi Iron WorksROW = right-of-wayU = Indicates constituent not detected at concentration equal to or greater than the specified reporting limit.
Att_A_Tables_Lodi Page 7 of 7 IRIS ENVIROMENTAL
TABLE A-3ANALYTICAL DATA INCLUDED IN THE HRA - SOILS (0-10 FEET BGS)
VOLATILE ORGANIC COMPOUNDSFormer Lodi Manufactured Gas Plant
Lodi, California
Loc
atio
n
Sam
ple
ID
Dep
th (f
eet b
gs)
Sam
ple
Dat
e
Ben
zene
Eth
ylbe
nzen
e
Tol
uene
m,p
-Xyl
ene
o-X
ylen
e
On-site AK-1-30" 2.5 7/15/2010 0.0014 U 0.0014 U 0.0014 U 0.0027 U 0.0014 UOn-site AK-1-38" 3.17 7/15/2010 0.0018 0.00095 U 0.00095 U 0.0019 U 0.00095 UOn-site AK-2-20" 1.7 7/15/2010 0.001 U 0.001 U 0.001 U 0.002 U 0.001 UOn-site AK-2-34" 2.83 7/15/2010 0.0011 U 0.0011 U 0.0011 U 0.0022 U 0.0011 UOn-site AK-3-17" 1.42 7/15/2010 0.0013 U 0.0013 U 0.0013 U 0.0026 U 0.0013 UOn-site SB-1-0' 0 10/15/2008 0.005 U 0.005 U 0.005 U 0.005 U 0.005 UOn-site SB-1-3' 3 10/15/2008 0.005 U 0.005 U 0.005 U 0.005 U 0.005 UOn-site SB-1-6' 6 10/15/2008 0.005 U 0.005 U 0.005 U 0.005 U 0.005 UOn-site SB-1-9' 9 10/15/2008 0.005 U 0.005 U 0.005 U 0.005 U 0.005 UOn-site SB-2-0' 0 10/15/2008 0.005 U 0.005 U 0.005 U 0.005 U 0.005 UOn-site SB-2-0' (DUP-6) 0 10/15/2008 0.005 U 0.005 U 0.005 U 0.005 U 0.005 UOn-site SB-2-3' 3 10/15/2008 0.005 U 0.005 U 0.005 U 0.005 U 0.005 UOn-site SB-2-6' 6 10/15/2008 0.005 U 0.005 U 0.005 U 0.005 U 0.005 UOn-site SB-2-9' 9 10/15/2008 0.005 U 0.005 U 0.005 U 0.005 U 0.005 UOn-site SB-5-0' 0 10/15/2008 0.023 0.005 U 0.018 0.0099 0.005 UOn-site SB-5-6' 6 10/15/2008 0.005 U 0.005 U 0.005 U 0.005 U 0.005 UOn-site SB-5-9' 9 10/15/2008 0.005 U 0.005 U 0.005 U 0.005 U 0.005 UOn-site SB-6-7.5' 7.5 10/14/2008 0.14 0.005 U 0.005 U 0.005 U 0.005 UOn-site SB-6-9.5' 9.5 10/14/2008 2700 50 500 U 58 19On-site SB-7-0' 0 10/15/2008 0.005 U 0.005 U 0.005 U 0.005 U 0.005 UOn-site SB-7-3' 3 10/15/2008 0.005 U 0.005 U 0.005 U 0.005 U 0.005 UOn-site SB-7-6' 6 10/15/2008 0.005 U 0.005 U 0.005 U 0.005 U 0.005 UOn-site SB-7-6' (DUP-4) 6 10/15/2008 0.005 U 0.005 U 0.005 U 0.005 U 0.005 UOn-site SB-7-9' 9 10/15/2008 0.005 U 0.005 U 0.005 U 0.005 U 0.005 UOn-site SB-8-0' 0 10/15/2008 0.005 U 0.005 U 0.005 U 0.005 U 0.005 UOn-site SB-8-3' 3 10/15/2008 0.005 U 0.005 U 0.005 U 0.005 U 0.005 UOn-site SB-8-5.5' 5.5 10/15/2008 0.005 U 0.005 U 0.005 U 0.005 U 0.005 UOn-site SB-8-6' 6 10/15/2008 0.005 U 0.005 U 0.005 U 0.005 U 0.005 UOn-site SB-8-9' 9 10/15/2008 0.005 U 0.005 U 0.005 U 0.005 U 0.005 UOn-site SB-9-0' 0 10/13/2008 0.005 U 0.005 U 0.005 U 0.005 U 0.005 UOn-site SB-9-3' 3 10/13/2008 0.005 U 0.005 U 0.005 U 0.005 U 0.005 UOn-site SB-9-3' (DUP-1) 3 10/13/2008 0.005 U 0.005 U 0.005 U 0.005 U 0.005 UOn-site SB-9-6' 6 10/13/2008 0.005 U 0.005 U 0.005 U 0.005 U 0.005 UOn-site SB-9-9' 9 10/13/2008 0.005 U 0.005 U 0.005 U 0.005 U 0.005 UOn-site SB-9-9' (DUP-2) 9 10/13/2008 0.005 U 0.005 U 0.005 U 0.005 U 0.005 UOn-site SB-10-1.5' 1.5 10/15/2008 0.005 U 0.005 U 0.005 U 0.005 U 0.005 UOn-site SB-10-3' 3 10/15/2008 0.005 U 0.005 U 0.005 U 0.005 U 0.005 UOn-site SB-10-3' (DUP-5) 3 10/15/2008 0.005 U 0.005 U 0.005 U 0.005 U 0.005 UOn-site SB-10-6' 6 10/15/2008 0.005 U 0.005 U 0.005 U 0.005 U 0.005 UOn-site SB-10-9' 9 10/15/2008 0.005 U 0.005 U 0.005 U 0.005 U 0.005 UOn-site SB-13-0' 0 10/13/2008 0.5 U 0.5 U 0.5 U 0.5 U 0.5 UOn-site SB-13-3' 3 10/13/2008 0.5 U 0.5 U 0.5 U 0.5 U 0.5 UOn-site SB-13-6' 6 10/13/2008 0.005 U 0.005 U 0.005 U 0.005 U 0.005 U
Att_A_Tables_Lodi Page 1 of 7 IRIS ENVIROMENTAL
TABLE A-3ANALYTICAL DATA INCLUDED IN THE HRA - SOILS (0-10 FEET BGS)
VOLATILE ORGANIC COMPOUNDSFormer Lodi Manufactured Gas Plant
Lodi, California
Loc
atio
n
Sam
ple
ID
Dep
th (f
eet b
gs)
Sam
ple
Dat
e
Ben
zene
Eth
ylbe
nzen
e
Tol
uene
m,p
-Xyl
ene
o-X
ylen
e
On-site SB-13-9' 9 10/13/2008 0.005 U 0.005 U 0.005 U 0.005 U 0.005 UOn-site SB-14-0' 0 10/13/2008 0.5 U 0.5 U 0.5 U 0.5 U 0.5 UOn-site SB-14-2' 2 10/13/2008 5 U 5 U 5 U 5 U 5 UOn-site SB-14-3' 3 10/13/2008 5 U 5 U 5 U 5 U 5 UOn-site SB-14-6' 6 10/13/2008 0.5 U 0.5 U 0.5 U 0.5 U 0.5 UOn-site SB-14-9' 9 10/13/2008 0.005 U 0.005 U 0.005 U 0.005 U 0.005 UOn-site SB-15-0' 0 10/13/2008 0.5 U 0.5 U 0.5 U 0.5 U 0.5 UOn-site SB-15-3' 3 10/13/2008 0.5 U 0.5 U 0.5 U 0.5 U 0.5 UOn-site SB-15-6' 6 10/13/2008 0.005 U 0.005 U 0.005 U 0.005 U 0.005 UOn-site SB-15-9' 9 10/13/2008 0.005 U 0.005 U 0.005 U 0.005 U 0.005 UOn-site SB-16-1' 1 10/13/2008 0.005 U 0.005 U 0.005 U 0.005 U 0.005 UOn-site SB-16-3' 3 10/13/2008 0.005 U 0.005 U 0.005 U 0.005 U 0.005 UOn-site SB-16-6' 6 10/13/2008 0.005 U 0.005 U 0.005 U 0.005 U 0.005 UOn-site SB-16-9' 9 10/13/2008 0.005 U 0.005 U 0.005 U 0.005 U 0.005 UOn-site SB-17-1' 1 11/5/2009 0.001 U 0.001 U 0.001 U 0.0021 U 0.001 UOn-site SB-18-0' 0 11/4/2009 0.00079 U 0.00079 U 0.00079 U 0.0016 U 0.00079 UOn-site SB-18-8' 8 11/4/2009 0.00066 U 0.00066 U 0.00066 U 0.0013 U 0.00066 UOn-site SB-19-5' 5 11/5/2009 0.00092 U 0.00092 U 0.00092 U 0.0018 U 0.00092 UOn-site SB-20-0' 0 11/4/2009 0.0047 0.00064 U 0.00064 U 0.0013 U 0.00064 UOn-site SB-21-0' 0 11/3/2009 0.00077 0.0006 U 0.00062 0.0012 U 0.0006 UOn-site SB-21-5' 5 11/2/2009 0.0009 U 0.0009 U 0.0009 U 0.0018 U 0.0009 UOn-site SB-21-10' 10 11/2/2009 0.00078 U 0.00078 U 0.00078 U 0.0016 U 0.00078 UOn-site SB-22-0' 0 11/2/2009 0.0018 0.00056 U 0.00056 U 0.0011 U 0.00056 UOn-site SB-22-5' 5 11/2/2009 0.00056 U 0.00056 U 0.00056 U 0.0011 U 0.00056 UOn-site SB-22-10' 10 11/2/2009 0.00062 U 0.00062 U 0.00062 U 0.0012 U 0.00062 UOn-site SB-23-0' 0 11/2/2009 0.0012 0.00071 U 0.0019 0.0014 U 0.00071 UOn-site SB-23-10' 10 11/2/2009 0.00069 U 0.00069 U 0.00069 U 0.0014 U 0.00069 UOn-site SB-24-0' 0 11/2/2009 0.00086 U 0.00086 U 0.00086 U 0.0017 U 0.00086 UOn-site SB-24-5' 5 11/2/2009 0.00074 U 0.00074 U 0.00074 U 0.0015 U 0.00074 UOn-site SB-24-10' 10 11/2/2009 0.00057 U 0.00057 U 0.00057 U 0.0011 U 0.00057 UOn-site SB-25-0' 0 11/2/2009 0.035 0.00067 U 0.0025 0.0013 U 0.00067 UOn-site SB-25-5' 5 11/2/2009 0.00042 U 0.00042 U 0.00042 U 0.00085 U 0.00042 UOn-site SB-25-10' 10 11/2/2009 0.00042 U 0.00042 U 0.00042 U 0.00085 U 0.00042 UOn-site SB-34-0' 0 11/3/2009 0.0038 0.00063 U 0.00063 U 0.0013 U 0.00063 UOn-site SB-34-8' 8 11/3/2009 0.00086 U 0.00086 U 0.00086 U 0.0017 U 0.00086 UOn-site SB-48-1.5' 1.5 7/13/2010 0.0016 0.00061 U 0.00061 U 0.0012 U 0.00061 UOn-site SB-48-3' 3 7/13/2010 0.001 U 0.001 U 0.001 U 0.002 U 0.001 UOn-site SB-48-6' 6 7/13/2010 0.00054 U 0.00054 U 0.00054 U 0.0011 U 0.00054 UOn-site SB-49-3' 3 7/13/2010 0.001 0.00055 U 0.00055 U 0.0011 U 0.00055 UOn-site SB-49-4' 4 7/13/2010 0.81 0.64 0.99 1.1 0.47On-site SB-49-6' 6 7/13/2010 0.00061 U 0.00061 U 0.00061 U 0.0012 U 0.00061 UOn-site SB-50-1.5' 1.5 7/13/2010 0.03 U 0.00073 U 0.00073 U 0.0015 U 0.00073 UOn-site SB-50-3' 3 7/13/2010 0.00064 U 0.00064 U 0.00064 U 0.0013 U 0.00064 U
Att_A_Tables_Lodi Page 2 of 7 IRIS ENVIROMENTAL
TABLE A-3ANALYTICAL DATA INCLUDED IN THE HRA - SOILS (0-10 FEET BGS)
VOLATILE ORGANIC COMPOUNDSFormer Lodi Manufactured Gas Plant
Lodi, California
Loc
atio
n
Sam
ple
ID
Dep
th (f
eet b
gs)
Sam
ple
Dat
e
Ben
zene
Eth
ylbe
nzen
e
Tol
uene
m,p
-Xyl
ene
o-X
ylen
e
On-site SB-50-6' 6 7/13/2010 0.00066 U 0.00066 U 0.00066 U 0.0013 U 0.00066 UOn-site SB-51-1.5' 1.5 7/13/2010 0.013 0.00058 U 0.00073 0.0012 U 0.00058 UOn-site SB-51-3' 3 7/13/2010 0.0034 0.00062 U 0.00062 U 0.0012 U 0.00062 UOn-site SB-51-6.5' 6.5 7/13/2010 0.0054 0.00052 U 0.00052 U 0.001 U 0.00052 UOn-site SB-51-9' 9 7/13/2010 0.00071 U 0.00071 U 0.00071 U 0.0014 U 0.00071 UOn-site SB-52-1' 1 7/12/2010 0.00069 U 0.00069 U 0.00069 U 0.0014 U 0.00069 UOn-site SB-52-3' 3 7/12/2010 0.00074 U 0.00074 U 0.00074 U 0.0015 U 0.00074 UOn-site SB-52-6' 6 7/12/2010 0.00059 U 0.00059 U 0.00059 U 0.0012 U 0.00059 UOn-site SB-52-9' 9 7/12/2010 0.00052 U 0.00052 U 0.00052 U 0.001 U 0.00052 UOn-site SB-53-0.5' 0.5 7/12/2010 0.00058 U 0.00058 U 0.00058 U 0.0012 U 0.00058 UOn-site SB-53-3' 3 7/13/2010 0.00052 U 0.00052 U 0.00052 U 0.001 U 0.00052 UOn-site SB-53-6' 6 7/13/2010 0.00056 U 0.00056 U 0.00056 U 0.0011 U 0.00056 UOn-site SB-53-9' 9 7/13/2010 0.00076 U 0.00076 U 0.00076 U 0.0015 U 0.00076 UOn-site SB-54-1' 1 7/12/2010 0.00078 U 0.00078 U 0.00078 U 0.0016 U 0.00078 UOn-site SB-54-3' 3 7/12/2010 0.00062 U 0.00062 U 0.00062 U 0.0012 U 0.00062 UOn-site SB-54-6' 6 7/12/2010 0.0006 U 0.0006 U 0.0006 U 0.0012 U 0.0006 UOn-site SB-54-9' 9 7/12/2010 0.00067 U 0.00067 U 0.00067 U 0.0013 U 0.00067 UOn-site SB-55-1.5' 1.5 7/13/2010 0.00043 U 0.00043 U 0.00043 U 0.00086 U 0.00043 UOn-site SB-55-3' 3 7/13/2010 0.00057 U 0.00057 U 0.00057 U 0.0011 U 0.00057 UOn-site SB-55-6' 6 7/13/2010 0.00083 U 0.00083 U 0.00083 U 0.0017 U 0.00083 UOn-site SB-55-9' 9 7/13/2010 0.00068 U 0.00068 U 0.00068 U 0.0014 U 0.00068 UOn-site SB-56-0.5' 0.5 7/14/2010 0.00076 U 0.00076 U 0.00076 U 0.0015 U 0.00076 UOn-site SB-56-3' 3 7/14/2010 0.00066 U 0.00066 U 0.00066 U 0.0013 U 0.00066 UOn-site SB-56-6' 6 7/14/2010 0.00058 U 0.00058 U 0.00058 U 0.0012 U 0.00058 UOn-site SB-56-9' 9 7/14/2010 0.00087 U 0.00087 U 0.00087 U 0.0017 U 0.00087 UOn-site SB-62-0 0 9/22/2010 0.0057 0.00038 U 0.0072 0.001 0.00038 UOn-site SB-62-5 5 9/22/2010 0.00075 0.00043 U 0.00043 U 0.00085 U 0.00043 UOn-site SB-62-10 10 9/22/2010 0.00035 U 0.00035 U 0.00035 U 0.00069 U 0.00035 UOn-site SB-63-1 1 9/23/2010 0.002 0.00043 U 0.00043 U 0.00086 U 0.00043 UOn-site SB-63-5 5 9/23/2010 0.00031 U 0.00031 U 0.00031 U 0.00062 U 0.00031 UOn-site SB-63-10 10 9/23/2010 0.0003 U 0.0003 U 0.0003 U 0.00059 U 0.0003 UOn-site SB-64-1 1 9/22/2010 0.00035 0.0003 U 0.0003 U 0.00061 U 0.0003 UOn-site SB-64-5 5 9/22/2010 0.00038 0.0003 U 0.0003 U 0.0006 U 0.0003 UOn-site SB-64-10 10 9/22/2010 0.00025 U 0.00025 U 0.00025 U 0.00051 U 0.00025 UOn-site SB-65-1 1 9/23/2010 0.001 0.00027 U 0.00027 U 0.00053 U 0.00027 UOn-site SB-65-5 5 9/23/2010 0.0018 0.00034 U 0.00034 U 0.00069 U 0.00034 UOn-site SB-65-10 10 9/23/2010 0.00027 U 0.00027 U 0.00027 U 0.00054 U 0.00027 UOn-site SB-66-0 0 9/23/2010 0.00024 U 0.00024 U 0.00024 U 0.00049 U 0.00024 UOn-site SB-66-5 5 9/23/2010 0.00025 U 0.00025 U 0.00025 U 0.00051 U 0.00025 UOn-site SB-66-10 10 9/23/2010 0.00022 U 0.00022 U 0.00022 U 0.00043 U 0.00022 UOn-site SB-67-0 0 9/23/2010 0.00034 U 0.00034 U 0.006 0.00068 U 0.00034 UOn-site SB-67-5 5 9/23/2010 0.00037 U 0.00037 U 0.00037 U 0.00075 U 0.00037 UOn-site SB-67-10 10 9/23/2010 0.00027 U 0.00027 U 0.00027 U 0.00054 U 0.00027 U
Att_A_Tables_Lodi Page 3 of 7 IRIS ENVIROMENTAL
TABLE A-3ANALYTICAL DATA INCLUDED IN THE HRA - SOILS (0-10 FEET BGS)
VOLATILE ORGANIC COMPOUNDSFormer Lodi Manufactured Gas Plant
Lodi, California
Loc
atio
n
Sam
ple
ID
Dep
th (f
eet b
gs)
Sam
ple
Dat
e
Ben
zene
Eth
ylbe
nzen
e
Tol
uene
m,p
-Xyl
ene
o-X
ylen
e
On-site SB-68-0 0 9/23/2010 0.0011 0.00038 U 0.0034 0.0013 0.00058On-site SB-68-5 5 9/23/2010 0.00029 U 0.00029 U 0.00076 0.00058 U 0.00029 UOn-site SB-68-10 10 9/23/2010 0.00033 0.00028 U 0.00065 0.00056 U 0.00028 UOn-site SB-69-0 0 9/23/2010 0.086 0.061 0.99 0.39 0.17On-site SB-69-5 5 9/23/2010 0.00027 U 0.00027 U 0.0049 0.0007 0.00027 UOn-site SB-69-10 10 9/23/2010 0.0003 U 0.0003 U 0.0007 0.0006 U 0.0003 UOn-site SS-1 0 2/24/2006 0.005 U 0.005 U 0.005 U 0.005 U 0.005 UOn-site SS-2 0 2/24/2006 0.005 U 0.005 U 0.005 U 0.005 U 0.005 UOn-site SS-3 0 2/24/2006 0.005 U 0.005 U 0.005 U 0.005 U 0.005 UOn-site SS-4 0 2/24/2006 0.025 U 0.025 U 0.025 U 0.025 U 0.025 UOn-site SS-5 0 2/24/2006 0.025 U 0.025 U 0.025 U 0.025 U 0.025 UOn-site SS-6 0 2/24/2006 0.025 U 0.025 U 0.025 U 0.025 U 0.025 UOn-site SS-7 0 2/24/2006 0.025 U 0.025 U 0.025 U 0.025 U 0.025 UOn-site SS-8 0 2/24/2006 0.025 U 0.025 U 0.025 U 0.025 U 0.025 UOn-site SS-9 0 2/24/2006 0.025 U 0.025 U 0.025 U 0.025 U 0.025 UOn-site TP-1-0.5' 0.5 7/12/2010 0.0009 U 0.0009 U 0.0009 U 0.0018 U 0.0009 UOn-site TP-1-3' 3 7/12/2010 0.00092 U 0.00092 U 0.00092 U 0.0018 U 0.00092 UOn-site TP-1-6' 6 7/12/2010 0.0011 U 0.0011 U 0.0011 U 0.0022 U 0.0011 UOn-site TP-2-0.5' 0.5 7/12/2010 0.0011 U 0.0011 U 0.0011 U 0.0023 U 0.0011 UOn-site TP-2-3' 3 7/12/2010 0.001 U 0.001 U 0.001 U 0.002 U 0.001 UOn-site TP-2-6' 6 7/12/2010 0.0011 U 0.0011 U 0.0011 U 0.0022 U 0.0011 UOn-site TP-2-9' 9 7/12/2010 0.0011 U 0.0011 U 0.0011 U 0.0023 U 0.0011 UOn-site TP-3-0.5' 0.5 7/12/2010 0.001 U 0.001 U 0.001 U 0.0021 U 0.001 UOn-site TP-3-3' 3 7/12/2010 0.0011 U 0.0011 U 0.0011 U 0.0022 U 0.0011 UOn-site TP-3-6' 6 7/12/2010 0.0011 U 0.0011 U 0.0011 U 0.0021 U 0.0011 UOn-site TP-4-0.5' 0.5 7/12/2010 0.001 U 0.001 U 0.001 U 0.0021 U 0.001 UOn-site TP-4-3' 3 7/12/2010 0.001 U 0.001 U 0.001 U 0.0021 U 0.001 UOn-site TP-4-6' 6 7/12/2010 0.001 U 0.001 U 0.001 U 0.002 U 0.001 UOn-site TP-5-0.5' 0.5 7/13/2010 0.001 U 0.001 U 0.001 U 0.0021 U 0.001 UOn-site TP-5-3' 3 7/13/2010 0.0016 U 0.0016 U 0.0016 U 0.0031 U 0.0016 UOn-site TP-5-6' 6 7/13/2010 0.00096 U 0.00096 U 0.00096 U 0.0019 U 0.00096 UOn-site TP-6-0.5' 0.5 7/13/2010 0.0015 0.00099 U 0.00099 U 0.002 U 0.00099 UOn-site TP-6-3' 3 7/13/2010 0.0011 U 0.0011 U 0.0011 U 0.0022 U 0.0011 UOn-site TP-6-6' 6 7/13/2010 0.0011 U 0.0011 U 0.0011 U 0.0021 U 0.0011 UOn-site TP-7-25S 1.17 7/12/2010 0.0014 0.0022 0.0044 0.016 0.0061On-site TP-7-25D 2.67 7/12/2010 0.0008 U 0.0008 U 0.0008 U 0.0016 U 0.0008 UOn-site TP-7-40S 1.17 7/12/2010 0.00097 U 0.00097 U 0.00097 U 0.0019 U 0.00097 UOn-site TP-7-40D 2.67 7/12/2010 0.00085 U 0.00085 U 0.00085 U 0.0017 U 0.00085 UOn-site TP-8-0.5' 0.5 7/13/2010 0.0017 0.0011 U 0.0011 U 0.0023 U 0.0011 UOn-site TP-8-3' 3 7/13/2010 0.001 U 0.001 U 0.001 U 0.002 U 0.001 UOn-site TP-8-6' 6 7/13/2010 0.001 U 0.001 U 0.001 U 0.002 U 0.001 UOn-site TP-9-0.5' 0.5 7/13/2010 0.13 0.0011 U 0.0023 0.0022 U 0.0011 UOn-site TP-9-3' 3 7/13/2010 0.0017 0.001 U 0.001 U 0.002 U 0.001 U
Att_A_Tables_Lodi Page 4 of 7 IRIS ENVIROMENTAL
TABLE A-3ANALYTICAL DATA INCLUDED IN THE HRA - SOILS (0-10 FEET BGS)
VOLATILE ORGANIC COMPOUNDSFormer Lodi Manufactured Gas Plant
Lodi, California
Loc
atio
n
Sam
ple
ID
Dep
th (f
eet b
gs)
Sam
ple
Dat
e
Ben
zene
Eth
ylbe
nzen
e
Tol
uene
m,p
-Xyl
ene
o-X
ylen
e
On-site TP-9-6' 6 7/13/2010 0.0064 0.001 U 0.001 U 0.002 U 0.001 UOn-site TP-9-9' 9 7/13/2010 0.00095 U 0.00095 U 0.00095 U 0.0019 U 0.00095 UOn-site TP-10-0.5' 0.5 7/13/2010 0.001 U 0.001 U 0.001 U 0.002 U 0.001 UOn-site TP-10-3' 3 7/13/2010 0.001 U 0.001 U 0.001 U 0.002 U 0.001 UOn-site TP-10-6' 6 7/13/2010 0.0011 U 0.0011 U 0.0011 U 0.0022 U 0.0011 UOn-site TP-11-0.5' 0.5 7/13/2010 0.013 0.0012 U 0.0012 U 0.0023 U 0.0012 UOn-site TP-11-3' 3 7/13/2010 0.0059 0.0013 U 0.0013 U 0.0025 U 0.0013 UOn-site TP-11-6' 6 7/13/2010 0.0014 0.0011 U 0.0011 U 0.0022 U 0.0011 UOn-site TP-11-9' 9 7/13/2010 0.0012 U 0.0012 U 0.0012 U 0.0023 U 0.0012 U
LIW Property SB-35-0' 0 11/9/2009 0.0032 0.0012 U 0.0012 U 0.0023 U 0.0012 ULIW Property SB-35-3' 3 11/9/2009 0.00093 U 0.00093 U 0.00093 U 0.0019 U 0.00093 ULIW Property SB-35-6' 6 11/9/2009 0.00085 U 0.00085 U 0.00085 U 0.0017 U 0.00085 ULIW Property SB-35-9' 9 11/9/2009 0.00078 U 0.00078 U 0.00078 U 0.0016 U 0.00078 ULIW Property SB-36-0' 0 11/9/2009 0.0015 0.0012 U 0.0012 U 0.0023 U 0.0012 ULIW Property SB-36-3' 3 11/9/2009 0.0012 U 0.0012 U 0.0012 U 0.0025 U 0.0012 ULIW Property SB-36-6' 6 11/9/2009 0.00091 U 0.00091 U 0.00091 U 0.0018 U 0.00091 ULIW Property SB-36-9' 9 11/9/2009 0.00098 U 0.00098 U 0.00098 U 0.002 U 0.00098 ULIW Property SB-37-0' 0 11/9/2009 0.0014 0.0011 U 0.0011 U 0.0021 U 0.0011 ULIW Property SB-37-3' 3 11/9/2009 0.0013 0.0011 U 0.0011 U 0.0022 U 0.0011 ULIW Property SB-37-6' 6 11/9/2009 0.00096 U 0.00096 U 0.00096 U 0.0019 U 0.00096 ULIW Property SB-37-9' 9 11/9/2009 0.001 U 0.001 U 0.001 U 0.002 U 0.001 ULIW Property SB-38-0' 0 11/9/2009 0.0017 0.00095 U 0.00095 U 0.0019 U 0.00095 ULIW Property SB-38-3' 3 11/9/2009 0.0011 U 0.0011 U 0.0011 U 0.0022 U 0.0011 ULIW Property SB-38-6' 6 11/9/2009 0.0011 U 0.0011 U 0.0011 U 0.0021 U 0.0011 ULIW Property SB-38-9' 9 11/9/2009 0.0011 U 0.0011 U 0.0011 U 0.002 U 0.0011 ULIW Property SB-39-0' 0 11/9/2009 0.0011 U 0.0011 U 0.0011 U 0.0022 U 0.0011 ULIW Property SB-39-3' 3 11/9/2009 0.001 U 0.001 U 0.001 U 0.0021 U 0.001 ULIW Property SB-39-6' 6 11/9/2009 0.001 U 0.001 U 0.001 U 0.002 U 0.001 ULIW Property SB-39-9' 9 11/9/2009 0.0011 U 0.0011 U 0.0011 U 0.0021 U 0.0011 ULIW Property SB-39-9' (DUP-6) 9 11/9/2009 0.0011 U 0.0011 U 0.0011 U 0.0021 U 0.0011 ULIW Property SB-40-0' 0 11/10/2009 0.0011 0.0011 U 0.0013 0.0021 U 0.0011 ULIW Property SB-40-3' 3 11/10/2009 0.0022 0.0012 U 0.0012 U 0.0024 U 0.0012 ULIW Property SB-40-6' 6 11/10/2009 0.00097 U 0.00097 U 0.00097 U 0.0019 U 0.00097 ULIW Property SB-40-9' 9 11/10/2009 0.00095 U 0.00095 U 0.00095 U 0.0019 U 0.00095 ULIW Property SB-41-0' 0 11/10/2009 0.0017 0.001 U 0.001 U 0.002 U 0.001 ULIW Property SB-41-3' 3 11/10/2009 0.00085 U 0.00085 U 0.00085 U 0.0017 U 0.00085 ULIW Property SB-41-6' 6 11/10/2009 0.00099 U 0.00099 U 0.00099 U 0.002 U 0.00099 ULIW Property SB-41-9' 9 11/10/2009 0.00089 U 0.00089 U 0.00089 U 0.0018 U 0.00089 ULIW Property SB-42-0' 0 11/10/2009 0.0034 0.0011 U 0.0013 0.0022 U 0.0011 ULIW Property SB-42-3' 3 11/10/2009 0.00095 U 0.00095 U 0.00095 U 0.0019 U 0.00095 ULIW Property SB-42-6' 6 11/10/2009 0.0008 U 0.0008 U 0.0008 U 0.0016 U 0.0008 ULIW Property SB-42-9' 9 11/10/2009 0.00086 U 0.00086 U 0.00086 U 0.0017 U 0.00086 ULIW Property SB-43-0' 0 11/10/2009 0.009 0.00097 U 0.001 0.0019 U 0.00097 U
Att_A_Tables_Lodi Page 5 of 7 IRIS ENVIROMENTAL
TABLE A-3ANALYTICAL DATA INCLUDED IN THE HRA - SOILS (0-10 FEET BGS)
VOLATILE ORGANIC COMPOUNDSFormer Lodi Manufactured Gas Plant
Lodi, California
Loc
atio
n
Sam
ple
ID
Dep
th (f
eet b
gs)
Sam
ple
Dat
e
Ben
zene
Eth
ylbe
nzen
e
Tol
uene
m,p
-Xyl
ene
o-X
ylen
e
LIW Property SB-43-3' 3 11/10/2009 0.001 U 0.001 U 0.001 U 0.0021 U 0.001 ULIW Property SB-43-6' 6 11/10/2009 0.00092 U 0.00092 U 0.00092 U 0.0018 U 0.00092 ULIW Property SB-43-9' 9 11/10/2009 0.00097 U 0.00097 U 0.00097 U 0.0019 U 0.00097 ULIW Property SB-44-0' 0 11/10/2009 0.047 U 0.047 U 0.067 0.094 U 0.047 ULIW Property SB-44-3' 3 11/10/2009 0.00098 U 0.00098 U 0.00098 U 0.002 U 0.00098 ULIW Property SB-44-6' 6 11/10/2009 0.001 U 0.001 U 0.001 U 0.002 U 0.001 ULIW Property SB-44-9' 9 11/10/2009 0.00099 U 0.00099 U 0.00099 U 0.002 U 0.00099 ULIW Property SB-45-0' 0 11/10/2009 0.0019 0.0011 U 0.0012 0.0022 U 0.0011 ULIW Property SB-45-3' 3 11/10/2009 0.0012 U 0.0012 U 0.0012 U 0.0024 U 0.0012 ULIW Property SB-45-6' 6 11/10/2009 0.00086 U 0.00086 U 0.00086 U 0.0017 U 0.00086 ULIW Property SB-45-9' 9 11/10/2009 0.00088 U 0.00088 U 0.00088 U 0.0018 U 0.00088 ULIW Property SB-46-0' 0 11/10/2009 0.003 0.00099 U 0.0019 0.002 U 0.00099 ULIW Property SB-46-3' 3 11/10/2009 0.0011 U 0.0011 U 0.0011 U 0.0022 U 0.0011 ULIW Property SB-46-6' 6 11/10/2009 0.00093 U 0.00093 U 0.00093 U 0.0019 U 0.00093 ULIW Property SB-46-9' 9 11/10/2009 0.00083 U 0.00083 U 0.00083 U 0.0017 U 0.00083 UOff-site ROW SB-3-0' 0 10/14/2008 0.005 U 0.005 U 0.005 U 0.005 U 0.005 UOff-site ROW SB-3-3' 3 10/14/2008 0.005 U 0.005 U 0.005 U 0.005 U 0.005 UOff-site ROW SB-3-6' 6 10/14/2008 0.005 U 0.005 U 0.005 U 0.005 U 0.005 UOff-site ROW SB-3-9' 9 10/14/2008 0.005 U 0.005 U 0.005 U 0.005 U 0.005 UOff-site ROW SB-3-9' (DUP-3) 9 10/14/2008 0.005 U 0.005 U 0.005 U 0.005 U 0.005 UOff-site ROW SB-4-0' 0 10/14/2008 0.005 U 0.005 U 0.005 U 0.005 U 0.005 UOff-site ROW SB-4-3' 3 10/14/2008 0.005 U 0.005 U 0.005 U 0.005 U 0.005 UOff-site ROW SB-4-6' 6 10/14/2008 0.0095 0.005 U 0.005 U 0.005 U 0.005 UOff-site ROW SB-4-7' 7 10/14/2008 0.005 U 0.005 U 0.005 U 0.005 U 0.005 UOff-site ROW SB-4-9' 9 10/14/2008 0.005 U 0.005 U 0.005 U 0.005 U 0.005 UOff-site ROW SB-11-0' 0 10/14/2008 0.022 0.005 U 0.005 U 0.005 U 0.005 UOff-site ROW SB-11-3' 3 10/14/2008 0.017 0.005 U 0.005 U 0.005 U 0.005 UOff-site ROW SB-11-6' 6 10/14/2008 0.0063 0.005 U 0.005 U 0.005 U 0.005 UOff-site ROW SB-11-9' 9 10/14/2008 0.005 U 0.005 U 0.005 U 0.005 U 0.005 UOff-site ROW SB-12-0' 0 10/14/2008 0.016 0.005 U 0.005 U 0.005 U 0.005 UOff-site ROW SB-12-1.5' 1.5 10/14/2008 0.005 U 0.005 U 0.005 U 0.005 U 0.005 UOff-site ROW SB-12-3' 3 10/14/2008 0.005 U 0.005 U 0.005 U 0.005 U 0.005 UOff-site ROW SB-12-6' 6 10/14/2008 0.0077 0.005 U 0.0068 0.005 U 0.005 UOff-site ROW SB-12-9' 9 10/14/2008 0.005 U 0.005 U 0.005 U 0.005 U 0.005 UOff-site ROW SB-26-0.5' 0.5 11/5/2009 0.00092 U 0.00092 U 0.00092 U 0.0018 U 0.00092 UOff-site ROW SB-26-5' 5 11/5/2009 0.00081 U 0.00081 U 0.00081 U 0.0016 U 0.00081 UOff-site ROW SB-27-0.5' 0.5 11/5/2009 0.00087 U 0.00087 U 0.00087 U 0.0017 U 0.00087 UOff-site ROW SB-27-5' 5 11/5/2009 0.00077 U 0.00077 U 0.00077 U 0.0015 U 0.00077 UOff-site ROW SB-27-10' (DUP-5) 10 11/5/2009 0.00091 U 0.00091 U 0.00091 U 0.0018 U 0.00091 UOff-site ROW SB-28-0.5' 0.5 11/5/2009 0.00092 U 0.00092 U 0.00092 U 0.0018 U 0.00092 UOff-site ROW SB-28-8' 8 11/5/2009 0.0009 U 0.0009 U 0.0009 U 0.0018 U 0.0009 UOff-site ROW SB-29-0.5' 0.5 11/4/2009 0.00087 U 0.00087 U 0.00087 U 0.0017 U 0.00087 UOff-site ROW SB-29-5' 5 11/4/2009 0.00077 U 0.00077 U 0.00077 U 0.0015 U 0.00077 U
Att_A_Tables_Lodi Page 6 of 7 IRIS ENVIROMENTAL
TABLE A-3ANALYTICAL DATA INCLUDED IN THE HRA - SOILS (0-10 FEET BGS)
VOLATILE ORGANIC COMPOUNDSFormer Lodi Manufactured Gas Plant
Lodi, California
Loc
atio
n
Sam
ple
ID
Dep
th (f
eet b
gs)
Sam
ple
Dat
e
Ben
zene
Eth
ylbe
nzen
e
Tol
uene
m,p
-Xyl
ene
o-X
ylen
e
Off-site ROW SB-29-10' 10 11/4/2009 0.00078 U 0.00078 U 0.00078 U 0.0016 U 0.00078 UOff-site ROW SB-30-0.5' 0.5 11/4/2009 0.00091 U 0.00091 U 0.00091 U 0.0018 U 0.00091 UOff-site ROW SB-30-5' 5 11/4/2009 0.00083 U 0.00083 U 0.00083 U 0.0017 U 0.00083 UOff-site ROW SB-30-5' (DUP-3) 5 11/4/2009 0.00087 U 0.00087 U 0.00087 U 0.0017 U 0.00087 UOff-site ROW SB-30-10' 10 11/4/2009 0.00083 U 0.00083 U 0.00083 U 0.0017 U 0.00083 UOff-site ROW SB-31-0.5' 0.5 11/4/2009 0.00084 U 0.00084 U 0.00084 U 0.0017 U 0.00084 UOff-site ROW SB-31-5' 5 11/4/2009 0.00075 U 0.00075 U 0.00075 U 0.0015 U 0.00075 UOff-site ROW SB-31-10' 10 11/4/2009 0.00077 U 0.00077 U 0.00077 U 0.0015 U 0.00077 UOff-site ROW SB-32-0.5' 0.5 11/4/2009 0.00086 U 0.00086 U 0.00086 U 0.0017 U 0.00086 UOff-site ROW SB-32-5' 5 11/4/2009 0.00089 U 0.00089 U 0.00089 U 0.0018 U 0.00089 UOff-site ROW SB-32-10' 10 11/4/2009 0.00082 U 0.00082 U 0.00082 U 0.0016 U 0.00082 UOff-site ROW SB-33-0.5' 0.5 11/4/2009 0.051 0.00076 U 0.0035 0.0015 U 0.00076 UOff-site ROW SB-33-5' 5 11/4/2009 0.00076 U 0.00076 U 0.00076 U 0.0015 U 0.00076 UOff-site ROW SB-33-10' 10 11/4/2009 0.00084 U 0.00084 U 0.00084 U 0.0017 U 0.00084 UOff-site ROW SB-47-0.5' 0.5 7/15/2010 0.00069 U 0.00069 U 0.00069 U 0.0014 U 0.00069 UOff-site ROW SB-47-3' 3 7/15/2010 0.00084 U 0.00084 U 0.00084 U 0.0017 U 0.00084 UOff-site ROW SB-47-6' 6 7/15/2010 0.00075 U 0.00075 U 0.00075 U 0.0015 U 0.00075 UOff-site ROW SB-58-0 0 9/22/2010 0.00081 0.00021 U 0.00021 U 0.00042 U 0.00021 UOff-site ROW SB-58-5 5 9/22/2010 0.00034 U 0.00034 U 0.00034 U 0.00067 U 0.00034 UOff-site ROW SB-58-10 10 9/22/2010 0.00024 U 0.00024 U 0.00024 U 0.00049 U 0.00024 UOff-site ROW SB-59-3 3 9/22/2010 0.0073 0.00055 U 0.00064 0.0011 U 0.00055 UOff-site ROW SB-59-5 5 9/22/2010 0.0003 U 0.0003 U 0.0003 U 0.0006 U 0.0003 UOff-site ROW SB-59-10 10 9/22/2010 0.00038 U 0.00038 U 0.00038 U 0.00075 U 0.00038 UOff-site ROW SB-60-0 0 9/22/2010 0.00028 U 0.00028 U 0.00028 U 0.00056 U 0.00028 UOff-site ROW SB-60-5 5 9/22/2010 0.00021 U 0.00021 U 0.00021 U 0.00042 U 0.00021 UOff-site ROW SB-60-10 10 9/22/2010 0.00022 U 0.00022 U 0.00022 U 0.00045 U 0.00022 UOff-site ROW SB-61-0 0 9/22/2010 0.00035 U 0.00035 U 0.00035 U 0.0007 U 0.00035 UOff-site ROW SB-61-5 5 9/22/2010 0.00026 U 0.00026 U 0.00026 U 0.00053 U 0.00026 UOff-site ROW SB-61-10 10 9/22/2010 0.00035 U 0.00035 U 0.00035 U 0.00069 U 0.00035 U
Notes:Samples SHADED GRAY are included in the exposed soils (0-0.5 feet bgs) dataset.All analytical results are presented in milligrams per kilogram (mg/kg).-- = not analyzed for. bgs = below ground surfaceDUP = field duplicate sample.LIW = Lodi Iron WorksROW = right-of-wayU = Indicates constituent not detected at concentration equal to or greater than the specified reporting limit.
Att_A_Tables_Lodi Page 7 of 7 IRIS ENVIROMENTAL
TABLE A-4ANALYTICAL DATA INCLUDED IN THE HRA - SOILS (0-10 FEET BGS)
TOTAL PETROLEUM HYDROCARBONSFormer Lodi Manufactured Gas Plant
Lodi, CaliforniaL
ocat
ion
Sam
ple
ID
Dep
th (f
eet b
gs)
Sam
ple
Dat
e
TPH
as G
asol
ine
TPH
as D
iese
l
TPH
as M
otor
Oil
On-site AK-1-30" 2.5 7/15/2010 0.5 U 15 43On-site AK-1-38" 3.17 7/15/2010 0.5 U 5 U 25 UOn-site AK-2-20" 1.7 7/15/2010 0.5 U 5 U 25 UOn-site AK-2-34" 2.83 7/15/2010 0.5 U 5 U 25 UOn-site AK-3-17" 1.42 7/15/2010 0.5 U 5 U 25 UOn-site SB-1-0' 0 10/15/2008 0.5 U 30 65 JOn-site SB-1-3' 3 10/15/2008 0.5 U 5 U 25 UOn-site SB-1-6' 6 10/15/2008 0.5 U 5 U 25 UOn-site SB-1-9' 9 10/15/2008 0.5 U 5 U 25 UOn-site SB-2-0' 0 10/15/2008 0.5 U 5 U 25 UOn-site SB-2-0' (DUP-6) 0 10/15/2008 0.5 U 5 U 25 UOn-site SB-2-3' 3 10/15/2008 0.5 U 11 25 UOn-site SB-2-6' 6 10/15/2008 0.5 U 5 U 25 UOn-site SB-2-9' 9 10/15/2008 0.5 U 5 U 25 UOn-site SB-5-0' 0 10/15/2008 0.69 2500 J 7000On-site SB-5-6' 6 10/15/2008 0.5 U 5 U 25 UOn-site SB-5-9' 9 10/15/2008 0.5 U 5 U 25 UOn-site SB-6-7.5' 7.5 10/14/2008 1.6 J 1400 J 2600On-site SB-6-9.5' 9.5 10/14/2008 2800 42000 J 29000On-site SB-7-0' 0 10/15/2008 330 J 6200 11000 JOn-site SB-7-3' 3 10/15/2008 0.5 U 110 260 JOn-site SB-7-6' 6 10/15/2008 17 J 2600 5800 JOn-site SB-7-6' (DUP-4) 6 10/15/2008 1.1 J 36 J 98 JOn-site SB-7-9' 9 10/15/2008 0.5 U 5 U 25 UOn-site SB-8-0' 0 10/15/2008 5 U 5 U 25 UOn-site SB-8-3' 3 10/15/2008 5 U 5.7 25 UOn-site SB-8-5.5' 5.5 10/15/2008 12 J 4100 6700 JOn-site SB-8-6' 6 10/15/2008 5 U 5 U 25 UOn-site SB-8-9' 9 10/15/2008 5 U 5 U 25 UOn-site SB-9-0' 0 10/13/2008 0.5 U 940 J 3000On-site SB-9-3' 3 10/13/2008 0.5 U 17 J 39On-site SB-9-3' (DUP-1) 3 10/13/2008 0.5 U 11 25 UOn-site SB-9-6' 6 10/13/2008 0.5 U 150 J 960 JOn-site SB-9-9' 9 10/13/2008 0.5 U 5 U 25 UOn-site SB-9-9' (DUP-2) 9 10/13/2008 0.5 U 53 J 150On-site SB-10-1.5' 1.5 10/15/2008 7.7 J 3000 7800 JOn-site SB-10-3' 3 10/15/2008 0.5 U 220 810 JOn-site SB-10-3' (DUP-5) 3 10/15/2008 0.5 U 7.8 26On-site SB-10-6' 6 10/15/2008 0.5 U 13 48On-site SB-10-9' 9 10/15/2008 0.5 U 5 U 25 UOn-site SB-13-0' 0 10/13/2008 0.5 U 3300 J 6000 JOn-site SB-13-3' 3 10/13/2008 0.5 U 650 J 1300 JOn-site SB-13-6' 6 10/13/2008 0.5 U 5 U 25 U
Att_A_Tables_Lodi Page 1 of 7 IRIS ENVIROMENTAL
TABLE A-4ANALYTICAL DATA INCLUDED IN THE HRA - SOILS (0-10 FEET BGS)
TOTAL PETROLEUM HYDROCARBONSFormer Lodi Manufactured Gas Plant
Lodi, CaliforniaL
ocat
ion
Sam
ple
ID
Dep
th (f
eet b
gs)
Sam
ple
Dat
e
TPH
as G
asol
ine
TPH
as D
iese
l
TPH
as M
otor
Oil
On-site SB-13-9' 9 10/13/2008 0.5 U 5 U 25 UOn-site SB-14-0' 0 10/13/2008 0.5 U 2200 J 7400On-site SB-14-2' 2 10/13/2008 1100 J 27000 J 27000 JOn-site SB-14-3' 3 10/13/2008 460 J 4300 J 5000 JOn-site SB-14-6' 6 10/13/2008 49 J 770 J 880On-site SB-14-9' 9 10/13/2008 0.5 U 5 U 25 UOn-site SB-15-0' 0 10/13/2008 0.5 U 3000 J 9900On-site SB-15-3' 3 10/13/2008 0.5 U 3100 J 8700On-site SB-15-6' 6 10/13/2008 0.5 U 490 J 1400On-site SB-15-9' 9 10/13/2008 0.5 U 9.5 25 UOn-site SB-16-1' 1 10/13/2008 0.5 U 430 J 980 JOn-site SB-16-3' 3 10/13/2008 0.5 U 160 J 820On-site SB-16-6' 6 10/13/2008 0.5 U 240 J 1300On-site SB-16-9' 9 10/13/2008 0.5 U 5 U 25 UOn-site SB-17-1' 1 11/5/2009 0.5 U 1900 4900On-site SB-18-0' 0 11/4/2009 0.5 U 1800 6900On-site SB-18-8' 8 11/4/2009 31 1200 6000On-site SB-19-5' 5 11/5/2009 0.5 U 1500 2900On-site SB-20-0' 0 11/4/2009 0.5 U 420 1100On-site SB-21-0' 0 11/3/2009 0.5 U 57 180On-site SB-21-5' 5 11/2/2009 0.5 U 5 U 25 UOn-site SB-21-10' 10 11/2/2009 0.5 U 5 U 25 UOn-site SB-22-0' 0 11/2/2009 0.5 U 63 180On-site SB-22-5' 5 11/2/2009 0.5 U 5 U 25 UOn-site SB-22-10' 10 11/2/2009 0.5 U 5 U 25 UOn-site SB-23-0' 0 11/2/2009 0.5 U 2800 8300On-site SB-23-10' 10 11/2/2009 0.5 U 5 U 25 UOn-site SB-24-0' 0 11/2/2009 0.5 U 84 240On-site SB-24-5' 5 11/2/2009 0.5 U 5 U 25 UOn-site SB-24-10' 10 11/2/2009 0.5 U 12 25 UOn-site SB-25-0' 0 11/2/2009 0.5 U 1600 4100On-site SB-25-5' 5 11/2/2009 0.5 U 5 U 25 UOn-site SB-25-10' 10 11/2/2009 0.5 U 5 U 25 UOn-site SB-34-0' 0 11/3/2009 0.5 U 1900 7300On-site SB-34-8' 8 11/3/2009 0.5 U 2200 5900On-site SB-48-1.5' 1.5 7/13/2010 0.5 U 400 1100On-site SB-48-3' 3 7/13/2010 0.5 U 270 860On-site SB-48-6' 6 7/13/2010 0.5 U 5 U 25 UOn-site SB-49-3' 3 7/13/2010 0.5 U 280 940On-site SB-49-4' 4 7/13/2010 2500 12000 17000On-site SB-49-6' 6 7/13/2010 0.55 18 45On-site SB-50-1.5' 1.5 7/13/2010 0.5 U 500 1000On-site SB-50-3' 3 7/13/2010 0.5 U 5 U 25 U
Att_A_Tables_Lodi Page 2 of 7 IRIS ENVIROMENTAL
TABLE A-4ANALYTICAL DATA INCLUDED IN THE HRA - SOILS (0-10 FEET BGS)
TOTAL PETROLEUM HYDROCARBONSFormer Lodi Manufactured Gas Plant
Lodi, CaliforniaL
ocat
ion
Sam
ple
ID
Dep
th (f
eet b
gs)
Sam
ple
Dat
e
TPH
as G
asol
ine
TPH
as D
iese
l
TPH
as M
otor
Oil
On-site SB-50-6' 6 7/13/2010 0.5 U 5 U 25 UOn-site SB-51-1.5' 1.5 7/13/2010 0.5 U 130 250On-site SB-51-3' 3 7/13/2010 0.5 U 160 250On-site SB-51-6.5' 6.5 7/13/2010 0.5 U 12000 18000On-site SB-51-9' 9 7/13/2010 0.5 U 5 U 25 UOn-site SB-52-1' 1 7/12/2010 0.5 U 5 U 25 UOn-site SB-52-3' 3 7/12/2010 0.5 U 5 U 25 UOn-site SB-52-6' 6 7/12/2010 0.5 U 5 U 25 UOn-site SB-52-9' 9 7/12/2010 0.5 U 5 U 25 UOn-site SB-53-0.5' 0.5 7/12/2010 0.5 U 410 1300On-site SB-53-3' 3 7/13/2010 0.5 U 1000 3700On-site SB-53-6' 6 7/13/2010 0.5 U 850 2200On-site SB-53-9' 9 7/13/2010 0.5 U 8.8 70On-site SB-54-1' 1 7/12/2010 0.5 U 5 U 25 UOn-site SB-54-3' 3 7/12/2010 0.5 U 170 360On-site SB-54-6' 6 7/12/2010 0.5 U 5 U 25 UOn-site SB-54-9' 9 7/12/2010 0.5 U 160 410On-site SB-55-1.5' 1.5 7/13/2010 0.5 U 5 U 41On-site SB-55-3' 3 7/13/2010 0.5 U 5 U 25 UOn-site SB-55-6' 6 7/13/2010 0.5 U 5 U 25 UOn-site SB-55-9' 9 7/13/2010 0.5 U 5 U 25 UOn-site SB-56-0.5' 0.5 7/14/2010 0.5 U 740 1400On-site SB-56-3' 3 7/14/2010 0.5 U 8 50On-site SB-56-6' 6 7/14/2010 0.5 U 5 U 25 UOn-site SB-56-9' 9 7/14/2010 0.5 U 5 U 25 UOn-site SB-62-0 0 9/22/2010 0.2 6500 14000On-site SB-62-5 5 9/22/2010 0.18 460 920On-site SB-62-10 10 9/22/2010 0.047 5 U 25 UOn-site SB-63-1 1 9/23/2010 0.11 810 2400On-site SB-63-5 5 9/23/2010 0.016 U 5 U 25 UOn-site SB-63-10 10 9/23/2010 0.016 6.5 25 UOn-site SB-64-1 1 9/22/2010 0.018 570 1600On-site SB-64-5 5 9/22/2010 0.015 U 940 3300On-site SB-64-10 10 9/22/2010 0.013 U 5 U 25 UOn-site SB-65-1 1 9/23/2010 0.013 U 5 U 25 UOn-site SB-65-5 5 9/23/2010 0.025 570 2100On-site SB-65-10 10 9/23/2010 0.013 U 6 25 UOn-site SB-66-0 0 9/23/2010 0.028 15 28On-site SB-66-5 5 9/23/2010 0.013 5 U 25 UOn-site SB-66-10 10 9/23/2010 0.011 U 5 U 25 UOn-site SB-67-0 0 9/23/2010 0.12 24 100On-site SB-67-5 5 9/23/2010 0.044 5 U 25 UOn-site SB-67-10 10 9/23/2010 0.013 U 5 U 25 U
Att_A_Tables_Lodi Page 3 of 7 IRIS ENVIROMENTAL
TABLE A-4ANALYTICAL DATA INCLUDED IN THE HRA - SOILS (0-10 FEET BGS)
TOTAL PETROLEUM HYDROCARBONSFormer Lodi Manufactured Gas Plant
Lodi, CaliforniaL
ocat
ion
Sam
ple
ID
Dep
th (f
eet b
gs)
Sam
ple
Dat
e
TPH
as G
asol
ine
TPH
as D
iese
l
TPH
as M
otor
Oil
On-site SB-68-0 0 9/23/2010 0.073 4300 7300On-site SB-68-5 5 9/23/2010 0.026 5 U 25 UOn-site SB-68-10 10 9/23/2010 0.025 5 U 25 UOn-site SB-69-0 0 9/23/2010 11 350 1200On-site SB-69-5 5 9/23/2010 0.016 5 U 25 UOn-site SB-69-10 10 9/23/2010 0.015 U 5 U 25 UOn-site SS-1 0 2/24/2006 1 U 700 1000On-site SS-2 0 2/24/2006 1 U 420 570On-site SS-3 0 2/24/2006 1 U 4900 7700On-site SS-4 0 2/24/2006 1 U 210 250On-site SS-5 0 2/24/2006 1 U 280 380On-site SS-6 0 2/24/2006 1 U 16 19On-site SS-7 0 2/24/2006 1 U 2200 3700On-site SS-8 0 2/24/2006 1 U 1700 2900On-site SS-9 0 2/24/2006 1 U 910 1300On-site TP-1-0.5' 0.5 7/12/2010 0.5 U 5.8 26On-site TP-1-3' 3 7/12/2010 0.5 U 5 U 25 UOn-site TP-1-6' 6 7/12/2010 0.5 U 5 U 25 UOn-site TP-2-0.5' 0.5 7/12/2010 0.5 U 42 110On-site TP-2-3' 3 7/12/2010 0.5 U 5 U 25 UOn-site TP-2-6' 6 7/12/2010 0.5 U 5 U 25 UOn-site TP-2-9' 9 7/12/2010 0.5 U 5 U 25 UOn-site TP-3-0.5' 0.5 7/12/2010 0.5 U 410 880On-site TP-3-3' 3 7/12/2010 0.5 U 27 68On-site TP-3-6' 6 7/12/2010 0.5 U 18 45On-site TP-4-0.5' 0.5 7/12/2010 0.5 U 5 U 25 UOn-site TP-4-3' 3 7/12/2010 0.5 U 5 U 25 UOn-site TP-4-6' 6 7/12/2010 0.5 U 5 U 25 UOn-site TP-5-0.5' 0.5 7/13/2010 0.5 U 5 U 25 UOn-site TP-5-3' 3 7/13/2010 0.5 U 5 U 25 UOn-site TP-5-6' 6 7/13/2010 0.5 U 5 U 25 UOn-site TP-6-0.5' 0.5 7/13/2010 0.5 U 72 170On-site TP-6-3' 3 7/13/2010 0.5 U 5 U 25 UOn-site TP-6-6' 6 7/13/2010 0.5 U 5 U 25 UOn-site TP-7-25S 1.17 7/12/2010 0.5 U 70 130On-site TP-7-25D 2.67 7/12/2010 0.5 U 5.5 25 UOn-site TP-7-40S 1.17 7/12/2010 0.5 U 7.8 25 UOn-site TP-7-40D 2.67 7/12/2010 0.5 U 5 U 25 UOn-site TP-8-0.5' 0.5 7/13/2010 0.5 U 520 1500On-site TP-8-3' 3 7/13/2010 0.5 U 55 150On-site TP-8-6' 6 7/13/2010 0.5 U 5 U 25 UOn-site TP-9-0.5' 0.5 7/13/2010 0.5 U 490 1400On-site TP-9-3' 3 7/13/2010 0.5 U 82 230
Att_A_Tables_Lodi Page 4 of 7 IRIS ENVIROMENTAL
TABLE A-4ANALYTICAL DATA INCLUDED IN THE HRA - SOILS (0-10 FEET BGS)
TOTAL PETROLEUM HYDROCARBONSFormer Lodi Manufactured Gas Plant
Lodi, CaliforniaL
ocat
ion
Sam
ple
ID
Dep
th (f
eet b
gs)
Sam
ple
Dat
e
TPH
as G
asol
ine
TPH
as D
iese
l
TPH
as M
otor
Oil
On-site TP-9-6' 6 7/13/2010 0.5 U 5 U 25 UOn-site TP-9-9' 9 7/13/2010 0.5 U 22 45On-site TP-10-0.5' 0.5 7/13/2010 0.5 U 5 U 25 UOn-site TP-10-3' 3 7/13/2010 0.5 U 70 190On-site TP-10-6' 6 7/13/2010 0.5 U 5 U 25 UOn-site TP-11-0.5' 0.5 7/13/2010 0.5 U 700 1600On-site TP-11-3' 3 7/13/2010 0.5 U 340 940On-site TP-11-6' 6 7/13/2010 0.5 U 40 99On-site TP-11-9' 9 7/13/2010 0.5 U 19 44
LIW Property SB-35-0' 0 11/9/2009 0.5 U 110 280LIW Property SB-35-3' 3 11/9/2009 0.5 U 5 U 25 ULIW Property SB-35-6' 6 11/9/2009 0.5 U 5 U 25 ULIW Property SB-35-9' 9 11/9/2009 0.5 U 5 U 25 ULIW Property SB-36-0' 0 11/9/2009 0.5 U 50 49LIW Property SB-36-3' 3 11/9/2009 0.5 U 5.4 25 ULIW Property SB-36-6' 6 11/9/2009 0.5 U 5 U 25 ULIW Property SB-36-9' 9 11/9/2009 0.5 U 5 U 25 ULIW Property SB-37-0' 0 11/9/2009 0.5 U 140 100LIW Property SB-37-3' 3 11/9/2009 0.5 U 43 130LIW Property SB-37-6' 6 11/9/2009 0.5 U 5 U 25 ULIW Property SB-37-9' 9 11/9/2009 0.5 U 5 U 25 ULIW Property SB-38-0' 0 11/9/2009 0.5 U 110 130LIW Property SB-38-3' 3 11/9/2009 0.5 U 7.8 25 ULIW Property SB-38-6' 6 11/9/2009 0.5 U 5 U 25 ULIW Property SB-38-9' 9 11/9/2009 0.5 U 5 U 25 ULIW Property SB-39-0' 0 11/9/2009 0.5 U 48 25 ULIW Property SB-39-3' 3 11/9/2009 0.5 U 5 U 25 ULIW Property SB-39-6' 6 11/9/2009 0.5 U 5 U 25 ULIW Property SB-39-9' 9 11/9/2009 0.5 U 5 U 25 ULIW Property SB-39-9' (DUP-6) 9 11/9/2009 0.5 U 5 U 25 ULIW Property SB-40-0' 0 11/10/2009 0.5 U 50 160LIW Property SB-40-3' 3 11/10/2009 0.5 U 190 360LIW Property SB-40-6' 6 11/10/2009 0.5 U 11 25 ULIW Property SB-40-9' 9 11/10/2009 0.5 U 6.7 25 ULIW Property SB-41-0' 0 11/10/2009 0.5 U 410 1400LIW Property SB-41-3' 3 11/10/2009 0.5 U 5 U 25 ULIW Property SB-41-6' 6 11/10/2009 0.5 U 5 U 25 ULIW Property SB-41-9' 9 11/10/2009 0.5 U 5 U 25 ULIW Property SB-42-0' 0 11/10/2009 0.5 U 15 25 ULIW Property SB-42-3' 3 11/10/2009 0.5 U 5 U 25 ULIW Property SB-42-6' 6 11/10/2009 0.5 U 5 U 25 ULIW Property SB-42-9' 9 11/10/2009 0.5 U 5 U 25 ULIW Property SB-43-0' 0 11/10/2009 0.5 U 220 620
Att_A_Tables_Lodi Page 5 of 7 IRIS ENVIROMENTAL
TABLE A-4ANALYTICAL DATA INCLUDED IN THE HRA - SOILS (0-10 FEET BGS)
TOTAL PETROLEUM HYDROCARBONSFormer Lodi Manufactured Gas Plant
Lodi, CaliforniaL
ocat
ion
Sam
ple
ID
Dep
th (f
eet b
gs)
Sam
ple
Dat
e
TPH
as G
asol
ine
TPH
as D
iese
l
TPH
as M
otor
Oil
LIW Property SB-43-3' 3 11/10/2009 0.5 U 5 U 25 ULIW Property SB-43-6' 6 11/10/2009 0.5 U 5 U 25 ULIW Property SB-43-9' 9 11/10/2009 0.5 U 8.1 25 ULIW Property SB-44-0' 0 11/10/2009 0.5 U 83 83LIW Property SB-44-3' 3 11/10/2009 0.93 46 80LIW Property SB-44-6' 6 11/10/2009 0.5 U 5 U 25 ULIW Property SB-44-9' 9 11/10/2009 0.5 U 5 U 25 ULIW Property SB-45-0' 0 11/10/2009 0.5 U 130 37LIW Property SB-45-3' 3 11/10/2009 0.5 U 6.5 25 ULIW Property SB-45-6' 6 11/10/2009 0.5 U 5 U 25 ULIW Property SB-45-9' 9 11/10/2009 0.5 U 5 U 25 ULIW Property SB-46-0' 0 11/10/2009 0.5 U 58 150LIW Property SB-46-3' 3 11/10/2009 0.5 U 5 U 25 ULIW Property SB-46-6' 6 11/10/2009 0.5 U 5 U 25 ULIW Property SB-46-9' 9 11/10/2009 0.5 U 5 U 25 UOff-site ROW SB-3-0' 0 10/14/2008 0.5 U 200 J 710Off-site ROW SB-3-3' 3 10/14/2008 0.5 U 200 J 950Off-site ROW SB-3-6' 6 10/14/2008 0.5 U 90 J 500Off-site ROW SB-3-9' 9 10/14/2008 0.5 U 5 U 25 UOff-site ROW SB-3-9' (DUP-3) 9 10/14/2008 0.5 U 5 U 25 UOff-site ROW SB-4-0' 0 10/14/2008 0.5 U 980 J 4600Off-site ROW SB-4-3' 3 10/14/2008 0.5 U 58 J 210Off-site ROW SB-4-6' 6 10/14/2008 0.5 U 1100 J 4000Off-site ROW SB-4-7' 7 10/14/2008 0.5 U 220 930Off-site ROW SB-4-9' 9 10/14/2008 0.5 U 5 U 30Off-site ROW SB-11-0' 0 10/14/2008 0.5 U 390 J 1500Off-site ROW SB-11-3' 3 10/14/2008 0.5 U 5 U 27Off-site ROW SB-11-6' 6 10/14/2008 0.5 U 6.5 25 UOff-site ROW SB-11-9' 9 10/14/2008 0.5 U 5 U 25 UOff-site ROW SB-12-0' 0 10/14/2008 0.5 U 540 J 1600Off-site ROW SB-12-1.5' 1.5 10/14/2008 0.5 U 5 U 25 UOff-site ROW SB-12-3' 3 10/14/2008 0.5 U 2400 J 8600Off-site ROW SB-12-6' 6 10/14/2008 0.5 U 1300 J 7400Off-site ROW SB-12-9' 9 10/14/2008 0.5 U 120 J 290Off-site ROW SB-26-0.5' 0.5 11/5/2009 0.5 U 210 680Off-site ROW SB-26-5' 5 11/5/2009 0.5 U 6 25 UOff-site ROW SB-27-0.5' 0.5 11/5/2009 0.5 U 26 73Off-site ROW SB-27-5' 5 11/5/2009 0.5 U 7 25 UOff-site ROW SB-27-10' (DUP-5) 10 11/5/2009 0.5 U 5 U 25 UOff-site ROW SB-28-0.5' 0.5 11/5/2009 0.5 U 5 U 25 UOff-site ROW SB-28-8' 8 11/5/2009 0.5 U 5 U 25 UOff-site ROW SB-29-0.5' 0.5 11/4/2009 0.5 U 7.4 25 UOff-site ROW SB-29-5' 5 11/4/2009 0.5 U 5 U 25 U
Att_A_Tables_Lodi Page 6 of 7 IRIS ENVIROMENTAL
TABLE A-4ANALYTICAL DATA INCLUDED IN THE HRA - SOILS (0-10 FEET BGS)
TOTAL PETROLEUM HYDROCARBONSFormer Lodi Manufactured Gas Plant
Lodi, CaliforniaL
ocat
ion
Sam
ple
ID
Dep
th (f
eet b
gs)
Sam
ple
Dat
e
TPH
as G
asol
ine
TPH
as D
iese
l
TPH
as M
otor
Oil
Off-site ROW SB-29-10' 10 11/4/2009 0.5 U 5 U 25 UOff-site ROW SB-30-0.5' 0.5 11/4/2009 0.5 U 15 41Off-site ROW SB-30-5' 5 11/4/2009 0.5 U 5 U 25 UOff-site ROW SB-30-5' (DUP-3) 5 11/4/2009 0.5 U 5 U 25 UOff-site ROW SB-30-10' 10 11/4/2009 0.5 U 5 U 25 UOff-site ROW SB-31-0.5' 0.5 11/4/2009 0.5 U 5 U 25 UOff-site ROW SB-31-5' 5 11/4/2009 0.5 U 5 U 25 UOff-site ROW SB-31-10' 10 11/4/2009 0.5 U 5 U 25 UOff-site ROW SB-32-0.5' 0.5 11/4/2009 0.5 U 22 50Off-site ROW SB-32-5' 5 11/4/2009 0.5 U 5 U 25 UOff-site ROW SB-32-10' 10 11/4/2009 0.5 U 5 U 25 UOff-site ROW SB-33-0.5' 0.5 11/4/2009 0.5 U 2200 5100Off-site ROW SB-33-5' 5 11/4/2009 0.5 U 5 U 25 UOff-site ROW SB-33-10' 10 11/4/2009 0.5 U 5 U 25 UOff-site ROW SB-47-0.5' 0.5 7/15/2010 0.5 U 620 1400Off-site ROW SB-47-3' 3 7/15/2010 0.5 U 25 100Off-site ROW SB-47-6' 6 7/15/2010 0.5 U 5 U 25 UOff-site ROW SB-58-0 0 9/22/2010 0.02 770 2800Off-site ROW SB-58-5 5 9/22/2010 0.017 U 5 U 25 UOff-site ROW SB-58-10 10 9/22/2010 0.012 U 5 U 25 UOff-site ROW SB-59-3 3 9/22/2010 0.15 15000 35000Off-site ROW SB-59-5 5 9/22/2010 0.015 U 5 U 25 UOff-site ROW SB-59-10 10 9/22/2010 0.019 U 5 U 25 UOff-site ROW SB-60-0 0 9/22/2010 0.018 270 810Off-site ROW SB-60-5 5 9/22/2010 0.01 U 13 83Off-site ROW SB-60-10 10 9/22/2010 0.013 5 U 25 UOff-site ROW SB-61-0 0 9/22/2010 0.025 27 96Off-site ROW SB-61-5 5 9/22/2010 0.013 U 5 U 25 UOff-site ROW SB-61-10 10 9/22/2010 0.017 U 5 U 25 U
Notes:Samples SHADED GRAY are included in the exposed soils (0-0.5 feet bgs) dataset.All analytical results are presented in milligrams per kilogram (mg/kg).-- = not analyzed for. bgs = below ground surfaceDUP = field duplicate sample.LIW = Lodi Iron WorksROW = right-of-wayTPH = total petroleum hydrocarbonJ = Estimated value.U = Indicates constituent not detected at concentration equal to or greater than the specified reporting limit.
Att_A_Tables_Lodi Page 7 of 7 IRIS ENVIROMENTAL
Modified ASTM D-1946
(%)
Ben
zene
Tolu
ene
Ethy
lben
zene
Tota
l Xyl
enes
Freo
n 12
Freo
n 11
Etha
nol
Ace
tone
Car
bon
Dis
ulfid
e
Met
hyl t
ert-b
utyl
eth
er
2-B
utan
one
(Met
hyl E
thyl
K
eton
e)
Hep
tane
Tric
hlor
oeth
ene
Tetra
chlo
roet
hene
2-H
exan
one
Styr
ene
Cum
ene
Prop
ylbe
nzen
e
4-Et
hylto
luen
e
1,3,
5-Tr
imet
hylb
enze
ne
1,2,
4-Tr
imet
hylb
enze
ne
1,1-
Difl
uoro
etha
ne
Nap
htha
lene
Hel
ium
SG-1S 5 7/15/2009 1.7 11 52 311 1.4 <1.6 3.2 68 <4.4 <1.0UJ 5.3 <1.2 <1.5 2.1 <5.8 <1.2 5.8 21 160 66 140 <3.8 <7.5 0.38SG-1D 8 7/15/2009 2.2 13 71 459 <2.1 <2.4 <4.0 78 <6.7 <1.5 3.9 <1.8 <2.3 3.9 <8.8 5.0 8.0 28 220 91 210 <5.8 <11 NASG-2S 5 7/14/2009 <12 3400 250 1340 <19 <21 <36 150 <59 <14UJ <11 <16 <20 <26 <78 <16 19 <19 70 41 120 <52 <100 NASG-2D 8 7/14/2009 <34 8000 690 3490 <53 <60 <81 260 <33 <38 <32 <44 <58 <72 <180 <46 <52 <53 91 69 160 <120 <220 NASG-3S 5 7/14/2009 <3.0 120 28 188 <4.6 <5.2 <8.8 71 <14 <3.4UJ <2.8 <3.8 <5.0 <6.3 <19 <4.0 10 31 210 60 170 <13 <24 NA
DUP-1 (SG-3S) 5 7/14/2009 1.4 120 30 200 1.0 1.3 <1.6 85 <2.7 <0.63UJ 3.2 1.0 2.1 3.5 <3.6 <0.74 11 32 210 60 180 <2.4 23 NASG-3D 8 7/15/2009 1.3 36 23 134 <0.97 1.4 <1.8 18 <3.0 <0.71UJ 2.6 1.7 <1.0 9.0 4.2 <0.83 10 48 310 88 240 <2.6 15 NASG-4S 5 7/14/2009 4.6 6.9 40 252 <1.5 1.8 <2.9 82 34 <1.1UJ 4.0 <1.2 6.2 2.6 <6.2 <1.3 22 12 83 29 59 <4.1 <8.0 NASG-4D 8 7/14/2009 7.5 9.9 42 250 <8.2 <9.4 <16 210 <26 <6.0UJ 7.8 <6.8 <9.0 <11 <34 <7.1 27 10 72 26 45 <22 <44 NASG-5S 5 7/16/2009 <2.7 36 3.7 26.3 <4.2 <4.7 <7.9 180 <13 <3.0 4.4 <3.4 <4.5 <5.7 <17 <3.6 5.6 9.6 66 26 66 <11 <22 NASG-5D 8 7/16/2009 <2.8 51 <3.9 19.8 <4.4 <5.0 16 250 <14 <3.2 8.1 <3.7 <4.8 <6.1 <18 <3.8 <4.4 16 110 50 120 5.1J <23 ND<0SG-6S 5 7/16/2009 <2.8 570 37 182 <4.3 <4.9 <8.2 28 <14 <3.2 4.0 7.6 <4.7 <5.9 <18 <3.7 <4.3 <4.3 7.8 <4.3 11 <12 <23 NA
DUP-2 (SG-6S) 5 7/16/2009 <2.7 480 33 171 <4.2 <4.8 <8.0 26 <13 <3.1 3.9 6.8 <4.6 <5.8 <18 <3.6 <4.2 <4.2 8.0 <4.2 11 <12 <22 NASG-6S (LAB DUP) -- -- <5.6 560 32 158 <8.6 <9.8 <16 30 <27 <6.3 <5.2 7.5 <9.4 <12 <36 <7.4 <8.6 <8.6 <8.6 <8.6 11 <24 <46 NA
SG-6D 8 7/16/2009 <5.4 1000 69 340 <8.3 <9.4 <16 60 <26 <6.0 6.9 13 <9.0 <11 <34 <7.2 <8.2 <8.2 12 <8.2 16 <23 <44 NAEB-1 -- 7/16/2009 <3.0 3.6 <4.1 <4.1 <4.7 <5.4 <9.0 300 <15 <3.4 4.2 <3.9 <5.1 <6.5 <20 <4.1 <4.7 <4.7 <4.7 <4.7 <4.7 <13 <25 NA
Notes:Only analytes detected above the method reporting limit are shownBold value denotes values that exceed the method detection or reporting limit.µg/m3 - micrograms per cubic meterbgs - below ground surfaceDUP - Duplicate sample% - percent< - Indicates constituent not detected at concentration equal to or greater than the specified reporting limit.J - Estimated value; concentration is above the method detection limit, but below the method reporting limit.UJ - Non-detected compound associated with low bias in the continuing calibration verification (CCV).
TABLE A-5ANALYTICAL DATA INCLUDED IN THE HRA - SOIL GAS
Former Lodi Manufactured Gas PlantLodi, California
VOLATILE ORGANIC COMPOUNDS
Method Modified TO-15 Low Level
(µg/m3)
Sample NameSample Depth
(feet bgs) Sample Date
Att_A_Tables_Lodi 1 of 1 IRIS ENVIRONMENTAL
FINAL Human Health Risk Assessment June 2011 Former Lodi Manufactured Gas Plant Site
IRIS ENVIRONMENTAL
ATTACHMENT B
DETERMINATION OF AMBIENT ARSENIC CONCENTRATIONS
FINAL Human Health Risk Assessment June 2011 Former Lodi Manufactured Gas Plant Site
B-1 IRIS ENVIRONMENTAL
ATTACHMENT B
DETERMINATION OF AMBIENT ARSENIC CONCENTRATIONS
B.1 Introduction
As indicated in the human health risk assessment (HRA) for the Former Lodi Manufactured Gas Plant Site (the “Site”), Cal/EPA guidance calls for the exclusion of inorganic chemicals from the quantitative risk assessment if they are detected at levels within the local background/ambient concentrations. As ambient soil concentrations of arsenic commonly exceed concentrations corresponding to incremental cancer risks of 10-
6 to 10-4, a more detailed Site-wide determination of ambient levels for arsenic was conducted. The Site-wide ambient determination for arsenic was conducted following the approach put forth by the California Environmental Protection Agency (Cal/EPA 1997, 2009) to determine whether arsenic in Site soils should be considered a COPC in the HRA. The approach and conclusions of the evaluation are summarized below.
B.2 Evaluation of Arsenic
The approach set forth by Cal/EPA (1997, 2009) evaluates whether the data distributions reflect single normal or lognormal populations, or contain multiple populations that would indicate contamination in addition to ambient levels. Cal/EPA recommends a “weight-of-evidence” approach where three indicators of local background/ambient exceedance are considered. The three indicators include: (1) the degree to which the site data distributions are fit by a normal or lognormal distribution; (2) a graphical assessment (probability plot against the normal or lognormal distribution) to identify breaks or nonlinearity indicative of more than a single population; and (3) the skewness of the data as indicated by the coefficient of variation (CV = standard deviation/average) and the data range (order of magnitude difference between the maximum and minimum concentrations). The arsenic dataset used herein for the ambient determination includes all arsenic data. Samples were collected from on-site (i.e., sampling locations within the Site boundaries, within the adjacent right-of-way to the west of the Site, and in the adjacent Lodi Iron Works property south of the Site) as well as from off-site (i.e., local background sampling locations). This arsenic data set is summarized in Table B-1.
B.2.1 Data Distributions
The distribution of the arsenic data set was tested using the Lilliefors test for normality to evaluate whether the data population was normally or lognormally distributed (Gilbert 1987). The test was performed on both raw and log-transformed data sets. The results of the Lilliefors test for normality are provided in Exhibit A. At the 95% confidence level, the data population of the entire dataset appears to be lognormally distributed. Therefore, the arsenic dataset was treated as distributed lognormally for the purposes of graphical and statistical assessments discussed below.
FINAL Human Health Risk Assessment June 2011 Former Lodi Manufactured Gas Plant Site
B-2 IRIS ENVIRONMENTAL
B.2.2 Graphical Assessment
A visual review of the cumulative probability plots for log-transformed arsenic dataset (presented in Exhibit B) indicates a generally smooth line for the data without obvious inflection points in the distribution; this implies a single population of arsenic at the Site. Furthermore, the box plot for the log-transformed arsenic dataset does not indicate any potential outliers in the upper end of the distribution (Exhibit C) and the Rosner outlier test did not detected any outliers at the 1% or 5% significance level (Exhibit D). The visual evidence of the cumulative probability plots, along with the results of the outlier test, support that the Site arsenic data comprises a single population.
B.2.3 Summary Statistics
As indicated in Table B-2, the log-transformed arsenic dataset consists of 228 samples ranging in concentration of -0.12 milligrams per kilogram (mg/kg; 0.75 mg/kg in non-transformed scale) up to 1.1 mg/kg (12 mg/kg in non-transformed scale), with a mean of 0.37 mg/kg (2.3 mg/kg in non-transformed scale) 1.
Typically, data drawn from just one population will display a range of detected values of no more than 2 orders of magnitude and a coefficient of variation no greater than 1. As shown in Table B-2, based on these criteria, both the range of detected values and coefficient of variation for the raw dataset suggest that the arsenic dataset is comprised of one population.
B.2 Conclusions
Based on the results presented above, arsenic present at the Site appears to be representative of local ambient concentrations, and is therefore excluded as a COPC in the HRA.
B.4 References Cal/EPA. 2009. Arsenic Strategies, Determination of Arsenic Remediation,
Development of Arsenic Cleanup Goals. Department of Toxic Substances Control. January 16.
Cal/EPA. 1997. Selecting Inorganic Constituents as Chemicals of Potential Concern at
Risk Assessment at Hazardous Waste Sites and Permitted Facilities. Department of Toxic Substances Control. February.
1 Note that only 4 out of 228 samples contained arsenic concentrations greater than 10 mg/kg (i.e., SB-30-13' [11.6 mg/kg], SB-31-15' [11.6 mg/kg], SB-33-10' [12 mg/kg], and SB-46-0' [10.4 mg/kg]). Three of these samples were collected at depths of 10 feet below ground surface (bgs) or greater within the adjacent right-of-way to the west of the Site, and the remaining sample was collect at surface from the adjacent Lodi Iron Works property south of the Site. Further, polycyclic aromatic hydrocarbons (PAHs), total petroleum hydrocarbons (TPHs), and benzene, toluene, ethylbenzene, and xylenes (BTEX) were not detected above laboratory reporting limits in any of these four samples.
FINAL Human Health Risk Assessment June 2011 Former Lodi Manufactured Gas Plant Site
B-3 IRIS ENVIRONMENTAL
Gilbert, R.O. 1987. Statistical Methods for Environmental Pollution Monitoring. New
York: Van Nostrand Reinhold.
FINAL Human Health Risk Assessment June 2011 Former Lodi Manufactured Gas Plant Site
IRIS ENVIRONMENTAL
ATTACHMENT B
TABLES
TABLE B-1SUMMARY OF ARSENIC DATASETFormer Lodi Manufactured Gas Plant
Lodi, California
Area 1 Sample ID Sample Date Sample Depth 2
On-site AK-1-30" 7/15/2010 2.5 0.795 -0.10On-site AK-1-38" 7/15/2010 3.17 0.956 -0.020On-site AK-2-20" 7/15/2010 1.7 0.75 U -0.12 UOn-site AK-2-34" 7/15/2010 2.83 0.926 -0.033On-site AK-3-17" 7/15/2010 1.42 1.23 0.090On-site SB-1-0' 10/15/2008 0 2.18 0.34On-site SB-1-3' 10/15/2008 3 0.75 U -0.12 UOn-site SB-1-6' 10/15/2008 6 0.75 U -0.12 UOn-site SB-1-9' 10/15/2008 9 6.03 0.78On-site SB-2-0' 10/15/2008 0 0.807 -0.093On-site SB-2-3' 10/15/2008 3 1.19 0.076On-site SB-2-6' 10/15/2008 6 0.904 -0.044On-site SB-2-9' 10/15/2008 9 1.97 0.29On-site SB-3-0' 10/14/2008 0 0.75 U -0.12 UOn-site SB-3-3' 10/14/2008 3 1.48 0.17On-site SB-3-6' 10/14/2008 6 1.27 0.10On-site SB-3-9' 10/14/2008 9 2.08 0.32On-site SB-4-0' 10/14/2008 0 1.17 0.068On-site SB-4-3' 10/14/2008 3 1.29 0.11On-site SB-4-6' 10/14/2008 6 1.23 0.090On-site SB-4-7' 10/14/2008 7 2.19 0.34On-site SB-4-9' 10/14/2008 9 0.75 U -0.12 UOn-site SB-5-0' 10/15/2008 0 5.36 0.73On-site SB-5-6' 10/15/2008 6 1.83 0.26On-site SB-5-9' 10/15/2008 9 1.39 0.14On-site SB-6-7.5' 10/14/2008 7.5 0.858 -0.067On-site SB-6-9.5' 10/14/2008 9.5 0.75 U -0.12 UOn-site SB-6-12.5' 10/14/2008 12.5 1.18 0.072On-site SB-7-0' 10/15/2008 0 2.37 0.37On-site SB-7-3' 10/15/2008 3 1.91 0.28On-site SB-7-6' 10/15/2008 6 2.33 0.37On-site SB-7-9' 10/15/2008 9 6.79 0.83On-site SB-8-0' 10/15/2008 0 0.75 U -0.12 UOn-site SB-8-3' 10/15/2008 3 0.75 U -0.12 UOn-site SB-8-5.5' 10/15/2008 5.5 5.66 0.75On-site SB-8-6' 10/15/2008 6 0.75 U -0.12 UOn-site SB-8-9' 10/15/2008 9 5.43 0.73On-site SB-9-0' 10/13/2008 0 3.49 0.54On-site SB-9-3' 10/13/2008 3 1.97 0.29On-site SB-9-6' 10/13/2008 6 1.93 0.29On-site SB-9-9' 10/13/2008 9 2.29 0.36On-site SB-10-1.5' 10/15/2008 1.5 1.21 0.083On-site SB-10-3' 10/15/2008 3 1.03 0.013On-site SB-10-6' 10/15/2008 6 1.15 0.061On-site SB-10-9' 10/15/2008 9 4.92 0.69On-site SB-11-0' 10/14/2008 0 1.29 0.11On-site SB-11-3' 10/14/2008 3 1.9 0.28
RawArsenic
(mg/kg) 3
Log-Transformed
Arsenic(mg/kg) 3
Attachment Arsenic Bkgd Determination Page 1 of 7 IRIS ENVIRONMENTAL
TABLE B-1SUMMARY OF ARSENIC DATASETFormer Lodi Manufactured Gas Plant
Lodi, California
Area 1 Sample ID Sample Date Sample Depth 2
RawArsenic
(mg/kg) 3
Log-Transformed
Arsenic(mg/kg) 3
On-site SB-11-6' 10/14/2008 6 2.04 0.31On-site SB-11-9' 10/14/2008 9 0.893 -0.049On-site SB-11-15' 10/14/2008 15 1.86 0.27On-site SB-12-0' 10/14/2008 0 1.38 0.14On-site SB-12-1.5' 10/14/2008 1.5 1.94 0.29On-site SB-12-3' 10/14/2008 3 2.82 0.45On-site SB-12-6' 10/14/2008 6 1.75 0.24On-site SB-12-9' 10/14/2008 9 1.5 0.18On-site SB-12-12' 10/14/2008 12 1.6 0.20On-site SB-12-15' 10/14/2008 15 4.11 0.61On-site SB-13-0' 10/13/2008 0 3.61 0.56On-site SB-13-3' 10/13/2008 3 1.75 0.24On-site SB-13-6' 10/13/2008 6 1.55 0.19On-site SB-13-9' 10/13/2008 9 2.42 0.38On-site SB-14-0' 10/13/2008 0 3.07 0.49On-site SB-14-2' 10/13/2008 2 2.3 0.36On-site SB-14-3' 10/13/2008 3 2.26 0.35On-site SB-14-6' 10/13/2008 6 2.26 0.35On-site SB-14-9' 10/13/2008 9 2.21 0.34On-site SB-15-0' 10/13/2008 0 2.31 0.36On-site SB-15-3' 10/13/2008 3 2.07 0.32On-site SB-15-6' 10/13/2008 6 2.63 0.42On-site SB-15-9' 10/13/2008 9 0.935 -0.029On-site SB-16-1' 10/13/2008 1 2.31 0.36On-site SB-16-3' 10/13/2008 3 0.923 -0.035On-site SB-16-6' 10/13/2008 6 2.63 0.42On-site SB-16-9' 10/13/2008 9 4.1 0.61On-site SB-17-1' 11/5/2009 1 5.04 0.70On-site SB-17-18' 11/6/2009 18 5.18 0.71On-site SB-17-20.5' 11/6/2009 20.5 1.7 0.23On-site SB-17-25.5' 11/6/2009 25.5 1.61 0.21On-site SB-18-0' 11/4/2009 0 2.8 0.45On-site SB-18-8' 11/4/2009 8 3.54 0.55On-site SB-18-16' 11/4/2009 16 8.67 0.94On-site SB-18-26' 11/4/2009 26 5.54 0.74On-site SB-18-65' 11/4/2009 65 3.08 0.49On-site SB-19-5' 11/5/2009 5 2.68 0.43On-site SB-19-15.5 11/5/2009 15.5 8.47 0.93On-site SB-19-21' 11/5/2009 21 2.34 0.37On-site SB-19-28' 11/5/2009 28 2.19 0.34On-site SB-20-0' 11/4/2009 0 2.9 0.46On-site SB-20-14' 11/5/2009 14 6.42 0.81On-site SB-20-20' 11/5/2009 20 2.46 0.39On-site SB-20-66.5' 11/5/2009 66.5 5.73 0.76On-site SB-21-0' 11/3/2009 0 8.46 0.93On-site SB-21-5' 11/2/2009 5 2.85 0.45On-site SB-21-10' 11/2/2009 10 4.54 0.66
Attachment Arsenic Bkgd Determination Page 2 of 7 IRIS ENVIRONMENTAL
TABLE B-1SUMMARY OF ARSENIC DATASETFormer Lodi Manufactured Gas Plant
Lodi, California
Area 1 Sample ID Sample Date Sample Depth 2
RawArsenic
(mg/kg) 3
Log-Transformed
Arsenic(mg/kg) 3
On-site SB-22-0' 11/2/2009 0 2.88 0.46On-site SB-22-5' 11/2/2009 5 2.7 0.43On-site SB-22-10' 11/2/2009 10 6.09 0.78On-site SB-23-0' 11/2/2009 0 7.16 0.85On-site SB-23-10' 11/2/2009 10 4.48 0.65On-site SB-23-12' 11/2/2009 12 4.75 0.68On-site SB-23-15' 11/2/2009 15 1.41 0.15On-site SB-24-0' 11/2/2009 0 2.45 0.39On-site SB-24-5' 11/2/2009 5 3.59 0.56On-site SB-24-10' 11/2/2009 10 5.73 0.76On-site SB-25-0' 11/2/2009 0 4.56 0.66On-site SB-25-10' 11/2/2009 10 2.53 0.40On-site SB-25-5' 11/2/2009 5 3.72 0.57On-site SB-26-0.5' 11/5/2009 0.5 1.41 0.15On-site SB-26-5' 11/5/2009 5 2.32 0.37On-site SB-26-15' 11/5/2009 15 8.82 0.95On-site SB-27-0.5' 11/5/2009 0.5 1.92 0.28On-site SB-27-5' 11/5/2009 5 1.42 0.15On-site SB-27-10' (DUP-5) 11/5/2009 10 1.42 0.15On-site SB-27-15' 11/5/2009 15 4.92 0.69On-site SB-28-0.5' 11/5/2009 0.5 1.39 0.14On-site SB-28-8' 11/5/2009 8 2.82 0.45On-site SB-28-15' 11/5/2009 15 3.48 0.54On-site SB-29-0.5' 11/4/2009 0.5 2.07 0.32On-site SB-29-5' 11/4/2009 5 2.42 0.38On-site SB-29-10' 11/4/2009 10 1.72 0.24On-site SB-29-13' 11/4/2009 13 2.76 0.44On-site SB-30-0.5' 11/4/2009 0.5 1.78 0.25On-site SB-30-5' 11/4/2009 5 3.06 0.49On-site SB-30-10' 11/4/2009 10 3.83 0.58On-site SB-30-13' 11/4/2009 13 11.6 1.06On-site SB-31-0.5' 11/4/2009 0.5 1.89 0.28On-site SB-31-5' 11/4/2009 5 2.64 0.42On-site SB-31-10' 11/4/2009 10 3.13 0.50On-site SB-31-15' 11/4/2009 15 11.6 1.06On-site SB-32-0.5' 11/4/2009 0.5 1.44 0.16On-site SB-32-5' 11/4/2009 5 3.28 0.52On-site SB-32-10' 11/4/2009 10 6.6 0.82On-site SB-32-15' 11/4/2009 15 4.06 0.61On-site SB-33-0.5' 11/4/2009 0.5 3.72 0.57On-site SB-33-5' 11/4/2009 5 3.35 0.53On-site SB-33-10' 11/4/2009 10 12 1.08On-site SB-33-15' 11/4/2009 15 3.79 0.58On-site SB-34-0' 11/3/2009 0 4.51 0.65On-site SB-34-8' 11/3/2009 8 2.87 0.46On-site SB-34-12' 11/3/2009 12 1.75 0.24On-site SB-35-0' 11/9/2009 0 3.27 0.51
Attachment Arsenic Bkgd Determination Page 3 of 7 IRIS ENVIRONMENTAL
TABLE B-1SUMMARY OF ARSENIC DATASETFormer Lodi Manufactured Gas Plant
Lodi, California
Area 1 Sample ID Sample Date Sample Depth 2
RawArsenic
(mg/kg) 3
Log-Transformed
Arsenic(mg/kg) 3
On-site SB-35-3' 11/9/2009 3 3 0.48On-site SB-35-6' 11/9/2009 6 3.93 0.59On-site SB-35-9' 11/9/2009 9 4.86 0.69On-site SB-36-0' 11/9/2009 0 3.76 0.58On-site SB-36-3' 11/9/2009 3 4.36 0.64On-site SB-36-6' 11/9/2009 6 3.21 0.51On-site SB-36-9' 11/9/2009 9 4.34 0.64On-site SB-37-0' 11/9/2009 0 1.43 0.16On-site SB-37-3' 11/9/2009 3 3.14 0.50On-site SB-37-6' 11/9/2009 6 4.47 0.65On-site SB-37-9' 11/9/2009 9 4.17 0.62On-site SB-38-0' 11/9/2009 0 6.35 0.80On-site SB-38-3' 11/9/2009 3 3.71 0.57On-site SB-38-6' 11/9/2009 6 4.42 0.65On-site SB-38-9' 11/9/2009 9 2.94 0.47On-site SB-39-0' 11/9/2009 0 3.14 0.50On-site SB-39-3' 11/9/2009 3 2.95 0.47On-site SB-39-6' 11/9/2009 6 3.79 0.58On-site SB-39-9' 11/9/2009 9 3.01 0.48On-site SB-40-0' 11/10/2009 0 3.93 0.59On-site SB-40-3' 11/10/2009 3 2.74 0.44On-site SB-40-6' 11/10/2009 6 2.53 0.40On-site SB-40-9' 11/10/2009 9 2.41 0.38On-site SB-41-0' 11/10/2009 0 1.87 0.27On-site SB-41-3' 11/10/2009 3 4.31 0.63On-site SB-41-6' 11/10/2009 6 3.37 0.53On-site SB-41-9' 11/10/2009 9 2.84 0.45On-site SB-42-0' 11/10/2009 0 1.99 0.30On-site SB-42-3' 11/10/2009 3 2.7 0.43On-site SB-42-6' 11/10/2009 6 5.75 0.76On-site SB-42-9' 11/10/2009 9 3.12 0.49On-site SB-43-0' 11/10/2009 0 2.35 0.37On-site SB-43-3' 11/10/2009 3 2.45 0.39On-site SB-43-6' 11/10/2009 6 2.4 0.38On-site SB-43-9' 11/10/2009 9 4.26 0.63On-site SB-44-0' 11/10/2009 0 3.87 0.59On-site SB-44-3' 11/10/2009 3 3.84 0.58On-site SB-44-6' 11/10/2009 6 4.26 0.63On-site SB-44-9' 11/10/2009 9 1.98 0.30On-site SB-45-0' 11/10/2009 0 1.44 0.16On-site SB-45-3' 11/10/2009 3 3.11 0.49On-site SB-45-6' 11/10/2009 6 1.97 0.29On-site SB-45-9' 11/10/2009 9 2.33 0.37On-site SB-46-0' 11/10/2009 0 10.4 1.02On-site SB-46-3' 11/10/2009 3 2.33 0.37On-site SB-46-6' 11/10/2009 6 3.59 0.56On-site SB-46-9' 11/10/2009 9 1.61 0.21
Attachment Arsenic Bkgd Determination Page 4 of 7 IRIS ENVIRONMENTAL
TABLE B-1SUMMARY OF ARSENIC DATASETFormer Lodi Manufactured Gas Plant
Lodi, California
Area 1 Sample ID Sample Date Sample Depth 2
RawArsenic
(mg/kg) 3
Log-Transformed
Arsenic(mg/kg) 3
On-site SB-47-0.5' 7/15/2010 0.5 6.93 0.84On-site SB-47-3' 7/15/2010 3 1.03 0.013On-site SB-47-6' 7/15/2010 6 1.59 0.20On-site SB-48-1.5' 7/13/2010 1.5 0.913 -0.04On-site SB-48-3' 7/13/2010 3 1.49 0.17On-site SB-48-6' 7/13/2010 6 2.22 0.35On-site SB-49-3' 7/13/2010 3 1.19 0.08On-site SB-49-4' 7/13/2010 4 1.29 0.11On-site SB-49-6' 7/13/2010 6 1.8 0.26On-site SB-50-1.5' 7/13/2010 1.5 2.1 0.32On-site SB-50-3' 7/13/2010 3 2.8 0.45On-site SB-50-6' 7/13/2010 6 5.03 0.70On-site SB-51-1.5' 7/13/2010 1.5 1.83 0.26On-site SB-51-3' 7/13/2010 3 2.15 0.33On-site SB-51-6.5' 7/13/2010 6.5 1.63 0.21On-site SB-51-9' 7/13/2010 9 3.98 0.60On-site SB-52-1' 7/12/2010 1 1.18 0.072On-site SB-52-3' 7/12/2010 3 2.69 0.43On-site SB-52-6' 7/12/2010 6 2.3 0.36On-site SB-52-9' 7/12/2010 9 4.94 0.69On-site SB-52-15' 7/12/2010 15 1.74 0.24On-site SB-52-20' 7/12/2010 20 3.84 0.58On-site SB-52-24.5' 7/12/2010 24.5 3.18 0.50On-site SB-53-0.5' 7/12/2010 0.5 2.59 0.41On-site SB-53-3' 7/13/2010 3 3.52 0.55On-site SB-53-6' 7/13/2010 6 4.03 0.61On-site SB-53-9' 7/13/2010 9 4.47 0.65On-site SB-53-15' 7/13/2010 15 2.66 0.42On-site SB-53-20.5' 7/13/2010 20.5 2.18 0.34On-site SB-53-25' 7/13/2010 25 3.19 0.50On-site SB-54-1' 7/12/2010 1 2.87 0.46On-site SB-54-3' 7/12/2010 3 2.35 0.37On-site SB-54-6' 7/12/2010 6 2.22 0.35On-site SB-54-9' 7/12/2010 9 3.44 0.54On-site SB-54-15' 7/12/2010 15 3.75 0.57On-site SB-54-20' 7/12/2010 20 5.48 0.74On-site SB-54-22' 7/12/2010 22 1.77 0.25On-site SB-55-1.5' 7/13/2010 1.5 1.46 0.16On-site SB-55-3' 7/13/2010 3 2.32 0.37On-site SB-55-6' 7/13/2010 6 3.23 0.51On-site SB-55-9' 7/13/2010 9 1.06 0.03On-site SB-55-15' 7/13/2010 15 2.63 0.42On-site SB-55-20' 7/13/2010 20 0.984 -0.007On-site SB-55-25' 7/13/2010 25 2.69 0.43On-site SB-56-0.5' 7/14/2010 0.5 2.78 0.44On-site SB-56-3' 7/14/2010 3 1.83 0.26On-site SB-56-6' 7/14/2010 6 4.35 0.64
Attachment Arsenic Bkgd Determination Page 5 of 7 IRIS ENVIRONMENTAL
TABLE B-1SUMMARY OF ARSENIC DATASETFormer Lodi Manufactured Gas Plant
Lodi, California
Area 1 Sample ID Sample Date Sample Depth 2
RawArsenic
(mg/kg) 3
Log-Transformed
Arsenic(mg/kg) 3
On-site SB-56-9' 7/14/2010 9 3.57 0.55On-site SB-56-15' 7/14/2010 15 2.97 0.47On-site SB-56-20.5' 7/14/2010 20.5 1.19 0.076On-site SB-56-25' 7/14/2010 25 3.25 0.51On-site SB-57-20.5' 7/15/2010 20.5 0.764 -0.12On-site SS-1 2/24/2006 0 2 0.30On-site SS-2 2/24/2006 0 1.3 0.11On-site SS-3 2/24/2006 0 4.7 0.67On-site SS-4 2/24/2006 0 3.7 0.57On-site SS-5 2/24/2006 0 2.8 0.45On-site SS-6 2/24/2006 0 2.5 0.40On-site SS-7 2/24/2006 0 9.2 0.96On-site SS-8 2/24/2006 0 7.5 0.88On-site SS-9 2/24/2006 0 3.2 0.51On-site TP-1-0.5' 7/12/2010 0.5 1.44 0.16On-site TP-1-3' 7/12/2010 3 0.941 -0.026On-site TP-1-6' 7/12/2010 6 0.983 -0.007On-site TP-2-0.5' 7/12/2010 0.5 2.12 0.33On-site TP-2-3' 7/12/2010 3 1.61 0.21On-site TP-2-6' 7/12/2010 6 1.39 0.14On-site TP-2-9' 7/12/2010 9 0.961 -0.017On-site TP-3-0.5' 7/12/2010 0.5 2.07 0.32On-site TP-3-3' 7/12/2010 3 2.08 0.32On-site TP-3-6' 7/12/2010 6 1.55 0.19On-site TP-4-0.5' 7/12/2010 0.5 0.867 -0.062On-site TP-4-3' 7/12/2010 3 1.47 0.17On-site TP-4-6' 7/12/2010 6 1.73 0.24On-site TP-5-0.5' 7/13/2010 0.5 0.988 -0.005On-site TP-5-3' 7/13/2010 3 1.17 0.07On-site TP-5-6' 7/13/2010 6 2.62 0.42On-site TP-6-0.5' 7/13/2010 0.5 4.78 0.68On-site TP-6-3' 7/13/2010 3 1.66 0.22On-site TP-6-6' 7/13/2010 6 1.83 0.26On-site TP-7-25D 7/12/2010 2.67 1.48 0.17On-site TP-7-25S 7/12/2010 1.17 0.75 U -0.12 UOn-site TP-7-40D 7/12/2010 2.67 2.03 0.31On-site TP-7-40S 7/12/2010 1.17 2.56 0.41On-site TP-8-0.5' 7/13/2010 0.5 2.83 0.45On-site TP-8-3' 7/13/2010 3 2.03 0.31On-site TP-8-6' 7/13/2010 6 1.54 0.19On-site TP-9-0.5' 7/13/2010 0.5 3.3 0.52On-site TP-9-3' 7/13/2010 3 2.13 0.33On-site TP-9-6' 7/13/2010 6 2 0.30On-site TP-9-9' 7/13/2010 9 1.1 0.04On-site TP-10-0.5' 7/13/2010 0.5 1.69 0.23On-site TP-10-3' 7/13/2010 3 2.23 0.35On-site TP-10-6' 7/13/2010 6 2.25 0.35
Attachment Arsenic Bkgd Determination Page 6 of 7 IRIS ENVIRONMENTAL
TABLE B-1SUMMARY OF ARSENIC DATASETFormer Lodi Manufactured Gas Plant
Lodi, California
Area 1 Sample ID Sample Date Sample Depth 2
RawArsenic
(mg/kg) 3
Log-Transformed
Arsenic(mg/kg) 3
On-site TP-11-0.5' 7/13/2010 0.5 1.06 0.03On-site TP-11-3' 7/13/2010 3 1.42 0.15On-site TP-11-6' 7/13/2010 6 1.49 0.17On-site TP-11-9' 7/13/2010 9 1.16 0.06Background PS-1-0' 11/13/2008 0 2.55 0.41Background PS-1-2' 11/13/2008 2 1.88 0.27Background PS-2-0' 11/13/2008 0 3.06 0.49Background PS-2-2' 11/13/2008 2 4.17 0.62Background PS-3-0' 11/13/2008 0 3.71 0.57Background PS-3-2' 11/13/2008 2 2.93 0.47Background PS-4-0' 11/13/2008 0 1.39 0.14Background PS-4-2' 11/13/2008 2 1.58 0.20Background PS-5-0' 11/13/2008 0 1.99 0.30Background PS-5-2' 11/13/2008 2 1.52 0.18Background PS-6-0' 11/13/2008 0 1.94 0.29Background PS-6-2' 11/13/2008 2 1.27 0.10
Notes:mg/kg = milligrams per kilogram
2 Depth from which sample was collected in feet below ground surface.
3 Results flagged with a "U" denote analyte was not detected above the reporting limit.
1 Area where soil sample was collected designated as follows: On-site = within the Site and Lodi Iron Works property boundaries, and in the adjacent right-of-way (South Sacramento Street), and Background = off-site samples collected within close proximity to Site for background purposes.
Attachment Arsenic Bkgd Determination Page 7 of 7 IRIS ENVIRONMENTAL
TABLE B-2DESCRIPTIVE STATISTICS OF LOG-TRANSFORMED
ARSENIC DATASETFormer Lodi Manufactured Gas Plant
Lodi, California
Descriptive Statistic
Full Log-Transformed
DatasetSample Size (n) 298Minimum Concentration -0.12 (0.76)Maximum Concentration 1.1 (12)Mean (µ) 0.37 (2.3)Median 0.37 (2.3)Standard Deviation 0.28Standard Error of the Mean 1 0.016Lower Quartile (Q1) 0.19Upper Quartile (Q3) 0.6Fourth Spread (fs) 0.36Lower Quartile Limit (LQL) -0.35 (0.45)Upper Quartile Limit (UQL) 1.1 (12)Coefficient of Variation 2 0.67Range - Order of Magnitude Difference 2 1.2
Notes:Concentration in units of milligrams per kilogram (mg/kg).1 The standard error of the mean = standard deviation / n.2 Based values from full raw dataset.
Attachment Arsenic Bkgd Determination Page 1 of 1 IRIS ENVIRONMENTAL
FINAL Human Health Risk Assessment June 2011 Former Lodi Manufactured Gas Plant Site
IRIS ENVIRONMENTAL
ATTACHMENT B
EXHIBITS
Exhibit ADESCRIPTIVE STATISTICS OF RAW ARSENIC DATASET
Former Lodi Manufactured Gas PlantLodi, California
0.95
K-S Critical(0.95) Value 0.0528
Data follow Appr. Gamma Distribution at (0.05) Significance Level
A-D Critical (0.95) Value 0.761
K-S Test Statistic 0.0477
Correlation Coefficient R 0.984
A-D Test Statistic 1.274
Data not Normal at (0.05) Significance Level
Gamma Distribution Test Results
Lilliefors Test Statistic 0.129
Lilliefors Critical (0.95) Value 0.0513
Approximate Shapiro Wilk Test Statistic 0.833
Approximate Shapiro Wilk P Value 0
Normal Distribution Test Results
Correlation Coefficient R 0.914
Mean of Log Transformed Data 0.842
Standard Deviation of Log Transformed Data 0.647
Standard Deviation of Raw Data 1.894
Kstar 2.671
Maximum 12
Mean of Raw Data 2.825
Number of Distinct Observations 217
Minimum 0.375
Raw Statistics
Number of Valid Observations 298
Confidence Coefficient
Arsenic
From File Site_Arsenic.wst
Full Precision OFF
Goodness-of-Fit Test Statistics for Full Data Sets without Non-Detects
User Selected Options
Attachment Arsenic Bkgd Determination Page 1 of 2 IRIS ENVIRONMENTAL
Exhibit ADESCRIPTIVE STATISTICS OF RAW ARSENIC DATASET
Former Lodi Manufactured Gas PlantLodi, California
Data appear Lognormal at (0.05) Significance Level
Lilliefors Test Statistic 0.0431
Lilliefors Critical (0.95) Value 0.0513
Approximate Shapiro Wilk Test Statistic 0.964
Approximate Shapiro Wilk P Value 4.661E-05
Lognormal Distribution Test Results
Correlation Coefficient R 0.989
Attachment Arsenic Bkgd Determination Page 2 of 2 IRIS ENVIRONMENTAL
Exhibit BCUMULATIVE PROBABILITY PLOT OF LOG-TRANSFORMED ARSENIC DATASET
Former Lodi Manufactured Gas PlantLodi, California
99.9
9
99.9
0
99.0
0
95.0
0
90.0
0
80.0
0
70.0
0
60.0
0
50.0
0
40.0
0
30.0
0
20.0
0
10.0
0
5.00
1.00
0.10
0.01
Cumulative Percent
1.2
0.8
0.4
0.0
-0.4
-0.8
Soil
Con
cent
ratio
n [m
g/kg
]Log10(Arsenic)
Attachment Arsenic Bkgd Determination Page 1 of 1 IRIS ENVIRONMENTAL
Exhibit CBOX PLOT OF LOG-TRANSFORMED ARSENIC DATASET
Former Lodi Manufactured Gas PlantLodi, California
Attachment Arsenic Bkgd Determination Page 1 of 1 IRIS ENVIRONMENTAL
Exhibit DOUTLIER TESTS OF LOG-TRANSFORMED ARSENIC DATASET
Former Lodi Manufactured Gas PlantLodi, California
1
5
# Mean outlier Number value (5%)
Test for Suspected Outliers with Dixon test
Test for Suspected Outliers with Rosner test
Rosner's Outlier Test for Log10(Arsenic)
CriticalObs. Critical
3.708
Test
1
value
4.0780.393 0.243 1.079 2.8271
value (1%)sd
2 0.391 0.24 1.064
2.851 3.708 4.078
2.806 3.708 4.078
0.234 1.017
33 0.388 0.237 1.064
2
Number of data
For 1% Significance Level, there is no Potential Outlier
0.964
4 2.695 3.708 4.0784 0.386
For 5% Significance Level, there is no Potential Outlier
5 3.708 4.0785 0.384 0.232 2.505
From File Site_Arsenic.wst
Full Precision OFF
Outlier Tests for Selected Variables
User Selected Options
Potential
Mean 0.393
Standard Deviation
288
Number of suspected outliers 5
0.243
Attachment Arsenic Bkgd Determination Page 1 of 1 IRIS ENVIRONMENTAL
FINAL Human Health Risk Assessment June 2011 Former Lodi Manufactured Gas Plant Site
IRIS ENVIRONMENTAL
ATTACHMENT C
DATA STATISTICAL EVALUATION
LOCAL BACKGROUND SOILS
1.428
Raw Statistics Log-transformed Statistics
Minimum 1.27 Minimum of Log Data 0.239
Shapiro Wilk Critical Value 0.859
99% Chebyshev (MVUE) UCL 4.999
95% UCLs (Adjusted for Skewness) 95% Chebyshev (MVUE) UCL 3.498
95% Adjusted-CLT UCL (Chen-1995) 2.851 97.5% Chebyshev (MVUE) UCL 4.005
Mean 102.7 Mean of log Data 4.626
Maximum 118 Maximum of Log Data 4.771
Raw Statistics
Minimum 85.17 Minimum of Log Data 4.445
Log-transformed Statistics
Number of Distinct Observations 11Number of Valid Observations 12
General Statistics
Chemical (barium)
and Singh and Singh (2003). For additional insight, the user may want to consult a statistician.
Note: Suggestions regarding the selection of a 95% UCL are provided to help the user to select the most appropriate 95% UCL.
These recommendations are based upon the results of the simulation studies summarized in Singh, Singh, and Iaci (2002)
Potential UCL to Use Use 95% Student's-t UCL 2.825
95% Adjusted Gamma UCL 3.001
95% Approximate Gamma UCL 2.901
99% Chebyshev(Mean, Sd) UCL 5.061Assuming Gamma Distribution
97.5% Chebyshev(Mean, Sd) UCL 4.045
95% Chebyshev(Mean, Sd) UCL 3.528Data appear Gamma Distributed at 5% Significance Level
Kolmogorov-Smirnov 5% Critical Value 0.246 95% BCA Bootstrap UCL 2.812
Kolmogorov-Smirnov Test Statistic 0.195 95% Percentile Bootstrap UCL 2.808
Anderson-Darling 5% Critical Value 0.731 95% Hall's Bootstrap UCL 2.896
Anderson-Darling Test Statistic 0.361 95% Bootstrap-t UCL 2.937
95% Standard Bootstrap UCL 2.76
Adjusted Chi Square Value 100 95% Jackknife UCL 2.825
Nonparametric Statistics
Adjusted Level of Significance 0.029 95% CLT UCL 2.784
Approximate Chi Square Value (.05) 103.4
nu star 128.6
MLE of Standard Deviation 1.007
MLE of Mean 2.333
Data appear Normal at 5% Significance Level
Theta Star 0.435
k star (bias corrected) 5.36
Gamma Distribution Test Data Distribution
95% Modified-t UCL (Johnson-1978) 2.835
Assuming Normal Distribution Assuming Lognormal Distribution
95% Student's-t UCL 2.825 95% H-UCL 2.978
Shapiro Wilk Critical Value 0.859
Data appear Normal at 5% Significance Level Data appear Lognormal at 5% Significance Level
Normal Distribution Test
Shapiro Wilk Test Statistic 0.945Shapiro Wilk Test Statistic 0.905
Lognormal Distribution Test
Relevant UCL Statistics
Skewness 0.793
Coefficient of Variation 0.407
SD 0.95
Median 1.965 SD of log Data 0.393
Mean 2.333 Mean of log Data 0.775
Maximum 4.17 Maximum of Log Data
General Statistics
Number of Valid Observations 12 Number of Distinct Observations 12
Chemical (arsenic)
Confidence Coefficient 95%
Number of Bootstrap Operations 2000
From File qryProUCLVer4_ForOutput_10ft.wst
Full Precision OFF
General UCL Statistics for Data Sets with Non-Detects
User Selected Options
Page 1 of 10
LOCAL BACKGROUND SOILS
108 97.5% Chebyshev (MVUE) UCL 123.5
Assuming Normal Distribution Assuming Lognormal Distribution
95% Student's-t UCL 108.6 95% H-UCL 109.2
Gamma Distribution Test Data Distribution
95% Modified-t UCL (Johnson-1978) 108.6 99% Chebyshev (MVUE) UCL 135.9
Approximate Chi Square Value (.05) 1491
95% Adjusted Gamma UCL 110
Lognormal Distribution Test with Detected Values Only
Shapiro Wilk Test Statistic 0.886 Shapiro Wilk Test Statistic 0.9
Normal Distribution Test with Detected Values Only
UCL Statistics
It is recommended to have 10-15 or more distinct observations for accurate and meaningful results.
the resulting calculations may not be reliable enough to draw conclusions
Note: It should be noted that even though bootstrap may be performed on this data set
Warning: There are only 6 Detected Values in this data
Maximum Non-Detect 0.25 Maximum Non-Detect -1.386
SD of Detected 0.159
Minimum Non-Detect 0.25 Minimum Non-Detect -1.386
SD of Detected 0.0493
Mean of Detected 0.306 Mean of Detected -1.194
Maximum Detected 0.369 Maximum Detected -0.997
Minimum Detected 0.253 Minimum Detected -1.374
Raw Statistics Log-transformed Statistics
Percent Non-Detects 50.00%
Number of Distinct Detected Data 6 Number of Non-Detect Data 6
Number of Valid Data 12 Number of Detected Data 6
General Statistics
Chemical (beryllium)
Note: Suggestions regarding the selection of a 95% UCL are provided to help the user to select the most appropriate 95% UCL.
These recommendations are based upon the results of the simulation studies summarized in Singh, Singh, and Iaci (2002)
and Singh and Singh (2003). For additional insight, the user may want to consult a statistician.
Potential UCL to Use Use 95% Student's-t UCL 108.6
Assuming Gamma Distribution 99% Chebyshev(Mean, Sd) UCL 135.4
95% Approximate Gamma UCL 109
Data appear Gamma Distributed at 5% Significance Level 95% Chebyshev(Mean, Sd) UCL 117
97.5% Chebyshev(Mean, Sd) UCL 123.2
Kolmogorov-Smirnov 5% Critical Value 0.245 95% BCA Bootstrap UCL 108
Kolmogorov-Smirnov Test Statistic 0.141 95% Percentile Bootstrap UCL 108.1
Anderson-Darling 5% Critical Value 0.731 95% Hall's Bootstrap UCL 108
Anderson-Darling Test Statistic 0.302 95% Bootstrap-t UCL 108.3
95% Standard Bootstrap UCL 108
Adjusted Chi Square Value 1477 95% Jackknife UCL 108.6
Nonparametric Statistics
Adjusted Level of Significance 0.029 95% CLT UCL 108.1
nu star 1582
MLE of Standard Deviation 12.65
MLE of Mean 102.7
Theta Star 1.558
k star (bias corrected) 65.92 Data appear Normal at 5% Significance Level
95% UCLs (Adjusted for Skewness) 95% Chebyshev (MVUE) UCL 117.2
95% Adjusted-CLT UCL (Chen-1995)
Data appear Normal at 5% Significance Level Data appear Lognormal at 5% Significance Level
Shapiro Wilk Critical Value 0.859 Shapiro Wilk Critical Value 0.859
Shapiro Wilk Test Statistic 0.939 Shapiro Wilk Test Statistic 0.937
Relevant UCL Statistics
Normal Distribution Test Lognormal Distribution Test
Skewness -0.118
Coefficient of Variation 0.111
SD 11.36
Median 101 SD of log Data 0.112
Page 2 of 10
LOCAL BACKGROUND SOILS
Data Distribution Test with Detected Values Only
SD in Original Scale 0.0722
nu star 284.7
0.0415
K-S Test Statistic 0.697 Mean 0.28
0.313
Assuming Gamma Distribution
Gamma ROS Statistics using Extrapolated Data 95% KM (jackknife) UCL 0.3
Assuming Normal Distribution Assuming Lognormal Distribution
Data appear Normal at 5% Significance Level Data appear Lognormal at 5% Significance Level
Shapiro Wilk Critical Value 0.859 Shapiro Wilk Critical Value 0.859
Shapiro Wilk Test Statistic 0.976 Shapiro Wilk Test Statistic 0.959
Relevant UCL Statistics
Normal Distribution Test Lognormal Distribution Test
Skewness -0.139
Coefficient of Variation 0.195
SD 1.822
Median 9.575 SD of log Data 0.204
Mean 9.337 Mean of log Data 2.216
Maximum 12.4 Maximum of Log Data 2.518
Raw Statistics Log-transformed Statistics
Minimum 6.28 Minimum of Log Data 1.837
Number of Valid Observations 12 Number of Distinct Observations 11
General Statistics
Chemical (chromium)
Note: Suggestions regarding the selection of a 95% UCL are provided to help the user to select the most appropriate 95% UCL.
These recommendations are based upon the results of the simulation studies summarized in Singh, Maichle, and Lee (2006).
For additional insight, the user may want to consult a statistician.
Note: DL/2 is not a recommended method.
95% Adjusted Gamma UCL 0.336
95% KM (t) UCL 0.303
95% KM (Percentile Bootstrap) UCL 0.312 95% Gamma Approximate UCL 0.332
AppChi2 817.7
Nu star 885.8 Potential UCLs to Use
Theta star 0.0083
k star 36.91 99% KM (Chebyshev) UCL 0.41
SD 0.0452 97.5% KM (Chebyshev) UCL 0.361
Median 0.303 95% KM (Chebyshev) UCL 0.337
Mean 0.306 95% KM (Percentile Bootstrap) UCL 0.312
Maximum 0.369 95% KM (BCA) UCL 0.323
Minimum 0.234 95% KM (bootstrap t) UCL
95% KM (z) UCL 0.301
95% KM (t) UCL 0.303
SE of Mean 0.0131Data appear Gamma Distributed at 5% Significance Level
5% K-S Critical Value 0.332 SD
A-D Test Statistic 0.384 Nonparametric Statistics
5% A-D Critical Value 0.697 Kaplan-Meier (KM) Method
Gamma Distribution Test with Detected Values Only
k star (bias corrected) 23.72 Data appear Normal at 5% Significance Level
Theta Star 0.0129
95% BCA Bootstrap UCL 0.283
95% Percentile Bootstrap UCL 0.282
95% MLE (Tiku) UCL 0.295
95% t UCL 0.285
95% MLE (t) UCL 0.287 Mean in Original Scale 0.248
SD 0.0723 SD in Log Scale 0.292
Mean 0.249 Mean in Log Scale -1.435
Maximum Likelihood Estimate(MLE) Method Log ROS Method
95% DL/2 (t) UCL 0.268 95% H-Stat (DL/2) UCL 0.295
SD 0.1 SD 0.475
DL/2 Substitution Method
Mean 0.216 Mean -1.637
DL/2 Substitution Method
Assuming Normal Distribution Assuming Lognormal Distribution
Data appear Normal at 5% Significance Level Data appear Lognormal at 5% Significance Level
5% Shapiro Wilk Critical Value 0.788 5% Shapiro Wilk Critical Value 0.788
Page 3 of 10
LOCAL BACKGROUND SOILS
Nonparametric Statistics
1.991
Raw Statistics Log-transformed Statistics
Minimum 3.68 Minimum of Log Data 1.303
Shapiro Wilk Critical Value 0.859
99% Chebyshev (MVUE) UCL 8.56
95% UCLs (Adjusted for Skewness) 95% Chebyshev (MVUE) UCL 6.734
95% Adjusted-CLT UCL (Chen-1995) 5.93 97.5% Chebyshev (MVUE) UCL 7.35
Anderson-Darling 5% Critical Value 0.732 95% Hall's Bootstrap UCL 6.1
Anderson-Darling Test Statistic 0.469 95% Bootstrap-t UCL 6.063
95% Standard Bootstrap UCL 5.834
Adjusted Chi Square Value 380.6 95% Jackknife UCL 5.911
Nonparametric Statistics
Adjusted Level of Significance 0.029 95% CLT UCL 5.86
Approximate Chi Square Value (.05) 387.4
nu star 434.8
MLE of Standard Deviation 1.248
MLE of Mean 5.312
Data appear Normal at 5% Significance Level
Theta Star 0.293
k star (bias corrected) 18.12
Gamma Distribution Test Data Distribution
95% Modified-t UCL (Johnson-1978) 5.922
Assuming Normal Distribution Assuming Lognormal Distribution
95% Student's-t UCL 5.911 95% H-UCL 5.989
Shapiro Wilk Critical Value 0.859
Data appear Normal at 5% Significance Level Data appear Lognormal at 5% Significance Level
Normal Distribution Test
Shapiro Wilk Test Statistic 0.935Shapiro Wilk Test Statistic 0.906
Lognormal Distribution Test
Relevant UCL Statistics
Skewness 0.675
Coefficient of Variation 0.218
SD 1.155
Median 4.83 SD of log Data 0.212
Mean 5.312 Mean of log Data 1.649
Maximum 7.32 Maximum of Log Data
General Statistics
Number of Valid Observations 12 Number of Distinct Observations 12
and Singh and Singh (2003). For additional insight, the user may want to consult a statistician.
Chemical (cobalt)
Note: Suggestions regarding the selection of a 95% UCL are provided to help the user to select the most appropriate 95% UCL.
These recommendations are based upon the results of the simulation studies summarized in Singh, Singh, and Iaci (2002)
Potential UCL to Use Use 95% Student's-t UCL 10.28
95% Adjusted Gamma UCL 10.58
95% Approximate Gamma UCL 10.4
Assuming Gamma Distribution 99% Chebyshev(Mean, Sd) UCL 14.57
97.5% Chebyshev(Mean, Sd) UCL 12.62
95% Chebyshev(Mean, Sd) UCL 11.63Data appear Gamma Distributed at 5% Significance Level
Kolmogorov-Smirnov 5% Critical Value 0.245 95% BCA Bootstrap UCL 10.15
Kolmogorov-Smirnov Test Statistic 0.184 95% Percentile Bootstrap UCL 10.19
Anderson-Darling 5% Critical Value 0.731 95% Hall's Bootstrap UCL 10.19
Anderson-Darling Test Statistic 0.242 95% Bootstrap-t UCL 10.28
95% Standard Bootstrap UCL 10.17
95% CLT UCL 10.2
Adjusted Chi Square Value 434.4 95% Jackknife UCL 10.28
Adjusted Level of Significance 0.029
Approximate Chi Square Value (.05) 441.7
nu star 492.2
MLE of Standard Deviation 2.062
MLE of Mean 9.337
k star (bias corrected) 20.51 Data appear Normal at 5% Significance Level
Theta Star 0.455
Gamma Distribution Test Data Distribution
95% Adjusted-CLT UCL (Chen-1995) 10.18
95% Modified-t UCL (Johnson-1978) 10.28 99% Chebyshev (MVUE) UCL 14.84
97.5% Chebyshev (MVUE) UCL 12.79
95% UCLs (Adjusted for Skewness) 95% Chebyshev (MVUE) UCL 11.75
95% Student's-t UCL 10.28 95% H-UCL 10.48
Page 4 of 10
LOCAL BACKGROUND SOILS
11.67 97.5% Chebyshev (MVUE) UCL 15.23
Assuming Normal Distribution Assuming Lognormal Distribution
95% Student's-t UCL 11.74 95% H-UCL 12.05
Gamma Distribution Test Data Distribution
95% Modified-t UCL (Johnson-1978) 11.74 99% Chebyshev (MVUE) UCL 18.12
Approximate Chi Square Value (.05) 260.4
95% Adjusted Gamma UCL 12.18
Note: Suggestions regarding the selection of a 95% UCL are provided to help the user to select the most appropriate 95% UCL.
These recommendations are based upon the results of the simulation studies summarized in Singh, Singh, and Iaci (2002)
and Singh and Singh (2003). For additional insight, the user may want to consult a statistician.
Potential UCL to Use Use 95% Student's-t UCL 11.74
Assuming Gamma Distribution 99% Chebyshev(Mean, Sd) UCL 17.98
95% Approximate Gamma UCL 11.92
Data appear Gamma Distributed at 5% Significance Level 95% Chebyshev(Mean, Sd) UCL 13.7
97.5% Chebyshev(Mean, Sd) UCL 15.14
Kolmogorov-Smirnov 5% Critical Value 0.245 95% BCA Bootstrap UCL 11.65
Kolmogorov-Smirnov Test Statistic 0.228 95% Percentile Bootstrap UCL 11.55
Anderson-Darling 5% Critical Value 0.731 95% Hall's Bootstrap UCL 11.52
Anderson-Darling Test Statistic 0.53 95% Bootstrap-t UCL 11.91
95% Standard Bootstrap UCL 11.55
Adjusted Chi Square Value 254.9 95% Jackknife UCL 11.74
Nonparametric Statistics
Adjusted Level of Significance 0.029 95% CLT UCL 11.62
nu star 299.5
MLE of Standard Deviation 2.933
MLE of Mean 10.36
Theta Star 0.83
k star (bias corrected) 12.48 Data appear Normal at 5% Significance Level
95% UCLs (Adjusted for Skewness) 95% Chebyshev (MVUE) UCL 13.76
95% Adjusted-CLT UCL (Chen-1995)
Data appear Normal at 5% Significance Level Data appear Lognormal at 5% Significance Level
Shapiro Wilk Critical Value 0.859 Shapiro Wilk Critical Value 0.859
Shapiro Wilk Test Statistic 0.916 Shapiro Wilk Test Statistic 0.921
Relevant UCL Statistics
Normal Distribution Test Lognormal Distribution Test
Skewness 0.214
Coefficient of Variation 0.256
SD 2.651
Median 9.8 SD of log Data 0.259
Mean 10.36 Mean of log Data 2.308
Maximum 14.7 Maximum of Log Data 2.688
Raw Statistics
Minimum 6.75 Minimum of Log Data 1.91
Log-transformed Statistics
Number of Distinct Observations 12Number of Valid Observations 12
General Statistics
Chemical (copper)
and Singh and Singh (2003). For additional insight, the user may want to consult a statistician.
Note: Suggestions regarding the selection of a 95% UCL are provided to help the user to select the most appropriate 95% UCL.
These recommendations are based upon the results of the simulation studies summarized in Singh, Singh, and Iaci (2002)
Potential UCL to Use Use 95% Student's-t UCL 5.911
95% Adjusted Gamma UCL 6.068
95% Approximate Gamma UCL 5.961
99% Chebyshev(Mean, Sd) UCL 8.631Assuming Gamma Distribution
97.5% Chebyshev(Mean, Sd) UCL 7.395
95% Chebyshev(Mean, Sd) UCL 6.766Data appear Gamma Distributed at 5% Significance Level
Kolmogorov-Smirnov 5% Critical Value 0.245 95% BCA Bootstrap UCL 5.888
Kolmogorov-Smirnov Test Statistic 0.232 95% Percentile Bootstrap UCL 5.863
Page 5 of 10
LOCAL BACKGROUND SOILS
41.89
95% UCLs (Adjusted for Skewness)
Assuming Normal Distribution
95% H-UCL 24.26
Data do not follow a Discernable Distribution (0.05)
Theta Star 8.301
95% Approximate Gamma UCL 17.79
95% Adjusted Gamma UCL 19.15
7
Number of Valid Data 12 Number of Detected Data 5
Minimum Non-Detect 0.0835 Minimum Non-Detect -2.483
SD of Detected 0.0254 SD of Detected 0.23
Mean of Detected 0.113 Mean of Detected -2.203
Maximum Detected 0.144 Maximum Detected -1.938
Minimum Detected 0.0858 Minimum Detected -2.456
Raw Statistics Log-transformed Statistics
Percent Non-Detects 58.33%
Number of Distinct Detected Data 5 Number of Non-Detect Data
General Statistics
Chemical (mercury)
Note: Suggestions regarding the selection of a 95% UCL are provided to help the user to select the most appropriate 95% UCL.
These recommendations are based upon the results of the simulation studies summarized in Singh, Singh, and Iaci (2002)
and Singh and Singh (2003). For additional insight, the user may want to consult a statistician.
Potential UCL to Use Use 95% Chebyshev (Mean, Sd) UCL 21.53
99% Chebyshev(Mean, Sd) UCL 34.78Assuming Gamma Distribution
97.5% Chebyshev(Mean, Sd) UCL 26
Kolmogorov-Smirnov 5% Critical Value 0.249
95% Chebyshev(Mean, Sd) UCL 21.53Data not Gamma Distributed at 5% Significance Level
95% BCA Bootstrap UCL 14.95
Kolmogorov-Smirnov Test Statistic 0.266 95% Percentile Bootstrap UCL 14.84
Anderson-Darling 5% Critical Value 0.744 95% Hall's Bootstrap UCL 14.5
Anderson-Darling Test Statistic 1.044 95% Bootstrap-t UCL 15.41
95% Standard Bootstrap UCL 14.94
Adjusted Chi Square Value 18.91 95% Jackknife UCL 15.45
Adjusted Level of Significance 0.029 95% CLT UCL 15.09
Approximate Chi Square Value (.05) 20.35 Nonparametric Statistics
nu star 32.35
MLE of Standard Deviation 9.638
MLE of Mean 11.19
k star (bias corrected) 1.348
Gamma Distribution Test Data Distribution
95% Modified-t UCL (Johnson-1978) 15.48 99% Chebyshev (MVUE) UCL
95% Adjusted-CLT UCL (Chen-1995) 15.26 97.5% Chebyshev (MVUE) UCL 30.56
95% Chebyshev (MVUE) UCL 24.79
Assuming Lognormal Distribution
95% Student's-t UCL 15.45
Data not Normal at 5% Significance Level Data not Lognormal at 5% Significance Level
Shapiro Wilk Critical Value 0.859 Shapiro Wilk Critical Value 0.859
Shapiro Wilk Test Statistic 0.815 Shapiro Wilk Test Statistic 0.814
Normal Distribution Test Lognormal Distribution Test
Relevant UCL Statistics
Skewness 0.237
Coefficient of Variation 0.734
SD 8.213
Median 9.1 SD of log Data 0.874
Mean 11.19 Mean of log Data 2.098
Maximum 22.6 Maximum of Log Data 3.118
Minimum 2.79 Minimum of Log Data 1.026
Raw Statistics Log-transformed Statistics
Number of Valid Observations 12 Number of Distinct Observations 12
General Statistics
Chemical (lead)
Page 6 of 10
LOCAL BACKGROUND SOILSMaximum Non-Detect -2.483
95% H-Stat (DL/2) UCL 0.101
Assuming Normal Distribution Assuming Lognormal Distribution
Gamma Distribution Test with Detected Values Only Data Distribution Test with Detected Values Only
Maximum 0.156 95% KM (BCA) UCL 0.13
95% KM (Chebyshev) UCL 0.125
Mean 0.119 95% KM (Percentile Bootstrap) UCL 0.123
k star 16.03 99% KM (Chebyshev) UCL 0.161
0.109
Theta star 0.00744
95% Gamma Approximate UCL 0.135 95% KM (Percentile Bootstrap) UCL 0.123
General Statistics
Number of Valid Observations 12 Number of Distinct Observations 12
Chemical (nickel)
For additional insight, the user may want to consult a statistician.
Note: Suggestions regarding the selection of a 95% UCL are provided to help the user to select the most appropriate 95% UCL.
These recommendations are based upon the results of the simulation studies summarized in Singh, Maichle, and Lee (2006).
Note: DL/2 is not a recommended method.
95% Adjusted Gamma UCL 0.137
Nu star 384.7 Potential UCLs to Use
AppChi2 340.2 95% KM (t) UCL
SD 0.0261 97.5% KM (Chebyshev) UCL 0.137
Median 0.123
Minimum 0.0779 95% KM (bootstrap t) UCL 0.109
Gamma ROS Statistics using Extrapolated Data 95% KM (jackknife) UCL 0.107
95% KM (z) UCL 0.108Assuming Gamma Distribution
95% KM (t) UCL 0.109
SE of Mean 0.0064Data appear Gamma Distributed at 5% Significance Level
5% K-S Critical Value 0.357 SD 0.0198
K-S Test Statistic 0.679 Mean 0.0971
5% A-D Critical Value 0.679 Kaplan-Meier (KM) Method
A-D Test Statistic 0.37 Nonparametric Statistics
nu star 97.77
Theta Star 0.0115
k star (bias corrected) 9.777 Data appear Normal at 5% Significance Level
95% BCA Bootstrap UCL 0.0967
95% Percentile Bootstrap UCL 0.0944
95% MLE (Tiku) UCL 0.104
95% t UCL 0.0964
SD in Original Scale 0.0359
95% MLE (t) UCL 0.0959 Mean in Original Scale 0.0779
SD 0.0403 SD in Log Scale 0.463
Maximum Likelihood Estimate(MLE) Method
Mean 0.0751 Mean in Log Scale -2.65
Log ROS Method
95% DL/2 (t) UCL 0.0919
SD 0.0397 SD 0.52
Mean 0.0714 Mean -2.771
DL/2 Substitution Method DL/2 Substitution Method
Data appear Normal at 5% Significance Level Data appear Lognormal at 5% Significance Level
5% Shapiro Wilk Critical Value 0.762 5% Shapiro Wilk Critical Value 0.762
Shapiro Wilk Test Statistic 0.911 Shapiro Wilk Test Statistic 0.896
Normal Distribution Test with Detected Values Only Lognormal Distribution Test with Detected Values Only
UCL Statistics
It is recommended to have 10-15 or more distinct observations for accurate and meaningful results.
Note: It should be noted that even though bootstrap may be performed on this data set
the resulting calculations may not be reliable enough to draw conclusions
Warning: There are only 5 Detected Values in this data
Maximum Non-Detect 0.0835
Page 7 of 10
LOCAL BACKGROUND SOILS
Mean of log Data 1.869
7.09
Data appear Normal at 5% Significance Level
Shapiro Wilk Critical Value 0.859
Data appear Normal at 5% Significance Level
Gamma Distribution Test Data Distribution
Kolmogorov-Smirnov Test Statistic 0.159 95% Percentile Bootstrap UCL 6.944
8.222
Kolmogorov-Smirnov 5% Critical Value 0.245 95% BCA Bootstrap UCL 6.939
Assuming Gamma Distribution 99% Chebyshev(Mean, Sd) UCL 9.216
95% Approximate Gamma UCL 7.07
Mean of log Data 3.253
Number of Valid Observations 12 Number of Distinct Observations 11
Data appear Normal at 5% Significance Level
Shapiro Wilk Critical Value 0.859
Assuming Lognormal DistributionAssuming Normal Distribution
Shapiro Wilk Critical Value 0.859
Data appear Lognormal at 5% Significance Level
Normal Distribution Test Lognormal Distribution Test
Shapiro Wilk Test Statistic 0.861 Shapiro Wilk Test Statistic 0.895
Relevant UCL Statistics
Skewness 1.112
Coefficient of Variation 0.184
SD 4.837
Median 25.6 SD of log Data 0.174
Mean 26.24
Maximum 36.6 Maximum of Log Data 3.6
Minimum 20.7 Minimum of Log Data 3.03
Raw Statistics Log-transformed Statistics
General Statistics
Chemical (vanadium)
and Singh and Singh (2003). For additional insight, the user may want to consult a statistician.
Note: Suggestions regarding the selection of a 95% UCL are provided to help the user to select the most appropriate 95% UCL.
These recommendations are based upon the results of the simulation studies summarized in Singh, Singh, and Iaci (2002)
Use 95% Student's-t UCL 7.028Potential UCL to Use
95% Adjusted Gamma UCL 7.154
Data appear Gamma Distributed at 5% Significance Level 95% Chebyshev(Mean, Sd) UCL 7.716
97.5% Chebyshev(Mean, Sd) UCL
95% Bootstrap-t UCL 7.009
Anderson-Darling 5% Critical Value 0.73 95% Hall's Bootstrap UCL 6.984
Anderson-Darling Test Statistic 0.391
95% Standard Bootstrap UCL 6.962
Adjusted Chi Square Value 871.8 95% Jackknife UCL 7.028
Adjusted Level of Significance 0.029 95% CLT UCL 6.987
Approximate Chi Square Value (.05) 882.2 Nonparametric Statistics
nu star 952.8
MLE of Standard Deviation 1.039
MLE of Mean 6.546
Theta Star 0.165
k star (bias corrected) 39.7
95% Modified-t UCL (Johnson-1978) 7.026 99% Chebyshev (MVUE) UCL 9.277
95% Adjusted-CLT UCL (Chen-1995) 6.978 97.5% Chebyshev (MVUE) UCL 8.261
95% Student's-t UCL 7.028
95% UCLs (Adjusted for Skewness) 95% Chebyshev (MVUE) UCL 7.743
95% H-UCL
Assuming Lognormal DistributionAssuming Normal Distribution
Shapiro Wilk Critical Value 0.859
Data appear Lognormal at 5% Significance Level
Normal Distribution Test Lognormal Distribution Test
Shapiro Wilk Test Statistic 0.927 Shapiro Wilk Test Statistic 0.921
Relevant UCL Statistics
Skewness -0.107
Coefficient of Variation 0.142
SD 0.93
Median 6.535 SD of log Data 0.145
Mean 6.546
Maximum 7.85 Maximum of Log Data 2.061
Minimum 5.16 Minimum of Log Data 1.641
Raw Statistics Log-transformed Statistics
Page 8 of 10
LOCAL BACKGROUND SOILS28.91
Data appear Normal at 5% Significance Level
Gamma Distribution Test Data Distribution
Kolmogorov-Smirnov Test Statistic 0.249 95% Percentile Bootstrap UCL 28.69
34.96
Kolmogorov-Smirnov 5% Critical Value 0.245 95% BCA Bootstrap UCL 28.78
Assuming Gamma Distribution 99% Chebyshev(Mean, Sd) UCL 40.13
95% Approximate Gamma UCL 28.87
SD of log Data 0.383
Raw Statistics Log-transformed Statistics
Minimum 25.9 Minimum of Log Data 3.254
Shapiro Wilk Test Statistic 0.932
Relevant UCL Statistics
Normal Distribution Test Lognormal Distribution Test
81.28
Assuming Normal Distribution
95% H-UCL 60.67
Nonparametric Statistics
Data appear Normal at 5% Significance Level
95% Hall's Bootstrap UCL 55.6Anderson-Darling 5% Critical Value 0.731
Anderson-Darling Test Statistic 0.34 95% Bootstrap-t UCL 57.65
95% Standard Bootstrap UCL 55.79
95% CLT UCL 56.2
Adjusted Chi Square Value 111.2 95% Jackknife UCL 56.97
Adjusted Level of Significance 0.029
Approximate Chi Square Value (.05) 114.8
nu star 141.3
MLE of Standard Deviation 19.69
MLE of Mean 47.77
Theta Star 8.114
k star (bias corrected) 5.887
Gamma Distribution Test Data Distribution
95% Modified-t UCL (Johnson-1978) 57.06 99% Chebyshev (MVUE) UCL 101.1
95% Adjusted-CLT UCL (Chen-1995) 56.73
95% UCLs (Adjusted for Skewness) 95% Chebyshev (MVUE) UCL 71.17
97.5% Chebyshev (MVUE) UCL
Assuming Lognormal Distribution
95% Student's-t UCL 56.97
Data appear Lognormal at 5% Significance LevelData appear Normal at 5% Significance Level
Shapiro Wilk Critical Value 0.859 Shapiro Wilk Critical Value 0.859
Shapiro Wilk Test Statistic 0.924
Skewness 0.338
Coefficient of Variation 0.372
SD 17.76
Median 46.2
Mean 47.77 Mean of log Data 3.801
Maximum 76.3 Maximum of Log Data 4.335
Number of Valid Observations 12 Number of Distinct Observations 12
General Statistics
Chemical (zinc)
and Singh and Singh (2003). For additional insight, the user may want to consult a statistician.
Note: Suggestions regarding the selection of a 95% UCL are provided to help the user to select the most appropriate 95% UCL.
These recommendations are based upon the results of the simulation studies summarized in Singh, Singh, and Iaci (2002)
Use 95% Student's-t UCL 28.75Potential UCL to Use
95% Adjusted Gamma UCL 29.3
Data follow Appr. Gamma Distribution at 5% Significance Level 95% Chebyshev(Mean, Sd) UCL 32.33
97.5% Chebyshev(Mean, Sd) UCL
95% Bootstrap-t UCL 30.22
Anderson-Darling 5% Critical Value 0.731 95% Hall's Bootstrap UCL 36.32
Anderson-Darling Test Statistic 0.651
95% Standard Bootstrap UCL 28.43
Adjusted Chi Square Value 562.5 95% Jackknife UCL 28.75
Adjusted Level of Significance 0.029 95% CLT UCL 28.54
Approximate Chi Square Value (.05) 570.9 Nonparametric Statistics
nu star 628
MLE of Standard Deviation 5.13
MLE of Mean 26.24
Theta Star 1.003
k star (bias corrected) 26.17
95% Modified-t UCL (Johnson-1978) 28.82 99% Chebyshev (MVUE) UCL 39.41
95% Adjusted-CLT UCL (Chen-1995) 29.02 97.5% Chebyshev (MVUE) UCL 34.5
95% Student's-t UCL 28.75
95% UCLs (Adjusted for Skewness) 95% Chebyshev (MVUE) UCL 32
95% H-UCL
Page 9 of 10
LOCAL BACKGROUND SOILS
Kolmogorov-Smirnov 5% Critical Value 0.246 95% BCA Bootstrap UCL 55.79
97.5% Chebyshev(Mean, Sd) UCL 79.79
95% Approximate Gamma UCL 58.78
95% Adjusted Gamma UCL 60.7
and Singh and Singh (2003). For additional insight, the user may want to consult a statistician.
These recommendations are based upon the results of the simulation studies summarized in Singh, Singh, and Iaci (2002)
Note: Suggestions regarding the selection of a 95% UCL are provided to help the user to select the most appropriate 95% UCL.
Potential UCL to Use Use 95% Student's-t UCL 56.97
Assuming Gamma Distribution 99% Chebyshev(Mean, Sd) UCL 98.78
Data appear Gamma Distributed at 5% Significance Level 95% Chebyshev(Mean, Sd) UCL 70.12
Kolmogorov-Smirnov Test Statistic 0.18 95% Percentile Bootstrap UCL 56.29
Page 10 of 10
EXPOSED SOILS (0-0.5 FEET BGS)
k star 0.637 99% KM (Chebyshev) UCL 0.339
SD 0.274 97.5% KM (Chebyshev) UCL 0.252
Median 0.449 95% KM (Chebyshev) UCL 0.208
Mean 0.457 95% KM (Percentile Bootstrap) UCL 0.176
Maximum 1.051 95% KM (BCA) UCL 0.36
Minimum 1E-12 95% KM (bootstrap t) UCL 0.189
Assuming Gamma Distribution 95% KM (z) UCL 0.144
Gamma ROS Statistics using Extrapolated Data 95% KM (jackknife) UCL 0.142
Data appear Gamma Distributed at 5% Significance Level SE of Mean 0.0235
95% KM (t) UCL 0.145
5% K-S Critical Value 0.336 SD 0.107
K-S Test Statistic 0.704 Mean 0.106
A-D Test Statistic 0.398 Nonparametric Statistics
5% A-D Critical Value 0.704 Kaplan-Meier (KM) Method
nu star 13.39
k star (bias corrected) 1.116 Data appear Normal at 5% Significance Level
Theta Star 0.204
Gamma Distribution Test with Detected Values Only Data Distribution Test with Detected Values Only
95% BCA Bootstrap UCL 0.105
95% Percentile Bootstrap UCL 0.0927
95% t UCL 0.091
SD in Original Scale 0.105
Mean in Original Scale 0.0618
MLE method failed to converge properly Mean in Log Scale -3.52
SD in Log Scale 1.155
Maximum Likelihood Estimate(MLE) Method N/A Log ROS Method
95% DL/2 (t) UCL 0.68 95% H-Stat (DL/2) UCL 2.475
SD 0.72 SD 1.945
Mean 0.48 Mean -2.169
Assuming Normal Distribution Assuming Lognormal Distribution
DL/2 Substitution Method DL/2 Substitution Method
Data appear Normal at 5% Significance Level Data appear Lognormal at 5% Significance Level
5% Shapiro Wilk Critical Value 0.788 5% Shapiro Wilk Critical Value 0.788
Normal Distribution Test with Detected Values Only Lognormal Distribution Test with Detected Values Only
Shapiro Wilk Test Statistic 0.831 Shapiro Wilk Test Statistic 0.941
It is recommended to have 10-15 or more distinct observations for accurate and meaningful results.
UCL Statistics
Warning: There are only 6 Detected Values in this data
Note: It should be noted that even though bootstrap may be performed on this data set
the resulting calculations may not be reliable enough to draw conclusions
Observations < Largest ND are treated as NDs Single DL Non-Detect Percentage 100.00%
Note: Data have multiple DLs - Use of KM Method is recommended Number treated as Non-Detect 37
For all methods (except KM, DL/2, and ROS Methods), Number treated as Detected 0
Maximum Non-Detect 5 Maximum Non-Detect 1.609
Minimum Non-Detect 0.02 Minimum Non-Detect -3.912
SD of Detected 0.188 SD of Detected 0.792
Mean of Detected 0.228 Mean of Detected -1.75
Maximum Detected 0.55 Maximum Detected -0.598
Raw Statistics Log-transformed Statistics
Minimum Detected 0.065 Minimum Detected -2.733
Percent Non-Detects 83.78%
Number of Distinct Detected Data 6 Number of Non-Detect Data 31
General Statistics
Number of Valid Data 37 Number of Detected Data 6
Chemical (1-methylnaphthalene)
Confidence Coefficient 95%
Number of Bootstrap Operations 2000
From File qryProUCLVer4_ForOutput_Surface.wst
Full Precision OFF
General UCL Statistics for Data Sets with Non-Detects
User Selected Options
Page 1 of 39
EXPOSED SOILS (0-0.5 FEET BGS)
Shapiro Wilk Test Statistic 0.839 Shapiro Wilk Test Statistic 0.945
Data not Normal at 5% Significance Level Data appear Lognormal at 5% Significance Level
Mean 0.497 Mean -1.86
0.21
K-S Test Statistic 0.747 Mean 0.187
95% KM (Chebyshev) UCL 0.351
SD 0.201 97.5% KM (Chebyshev) UCL 0.422
Median 0.379
Mean 0.388 95% KM (Percentile Bootstrap) UCL 0.27
Maximum 0.81 95% KM (BCA) UCL 0.288
Gamma ROS Statistics using Extrapolated Data
Minimum 0.058 95% KM (bootstrap t) UCL 0.264
95% KM (jackknife) UCL 0.242
95% KM (z) UCL 0.249Assuming Gamma Distribution
95% KM (t) UCL 0.25
5% K-S Critical Value 0.224
Data follow Appr. Gamma Distribution at 5% Significance Level SE of Mean 0.0376
SD
5% A-D Critical Value 0.747 Kaplan-Meier (KM) Method
A-D Test Statistic 0.56 Nonparametric Statistics
nu star 49.27
Theta Star 0.203
k star (bias corrected) 1.642 Data Follow Appr. Gamma Distribution at 5% Significance Level
Gamma Distribution Test with Detected Values Only Data Distribution Test with Detected Values Only
95% BCA Bootstrap UCL 0.214
95% Percentile Bootstrap UCL 0.21
95% t UCL 0.208
SD in Original Scale 0.194
Mean in Original Scale 0.16
MLE method failed to converge properly
SD in Log Scale 1.041
Mean in Log Scale -2.382
Maximum Likelihood Estimate(MLE) Method N/A Log ROS Method
95% DL/2 (t) UCL 0.659 95% H-Stat (DL/2) UCL 2.142
SD 0.654 SD 1.843
Assuming Normal Distribution Assuming Lognormal Distribution
DL/2 Substitution Method DL/2 Substitution Method
UCL Statistics
5% Shapiro Wilk Critical Value 0.881 5% Shapiro Wilk Critical Value 0.881
Normal Distribution Test with Detected Values Only Lognormal Distribution Test with Detected Values Only
Observations < Largest ND are treated as NDs Single DL Non-Detect Percentage 100.00%
Note: Data have multiple DLs - Use of KM Method is recommended Number treated as Non-Detect 46
For all methods (except KM, DL/2, and ROS Methods), Number treated as Detected 0
Maximum Non-Detect 5 Maximum Non-Detect 1.609
Minimum Non-Detect 0.02 Minimum Non-Detect -3.912
SD of Detected 0.251 SD of Detected 0.781
Mean of Detected 0.334 Mean of Detected -1.368
Maximum Detected 0.81 Maximum Detected -0.211
Raw Statistics Log-transformed Statistics
Minimum Detected 0.058 Minimum Detected -2.847
Percent Non-Detects 67.39%
Number of Distinct Detected Data 12 Number of Non-Detect Data 31
General Statistics
Number of Valid Data 46 Number of Detected Data 15
For additional insight, the user may want to consult a statistician.
Chemical (2-methylnaphthalene)
Note: DL/2 is not a recommended method.
Note: Suggestions regarding the selection of a 95% UCL are provided to help the user to select the most appropriate 95% UCL.
These recommendations are based upon the results of the simulation studies summarized in Singh, Maichle, and Lee (2006).
95% Adjusted Gamma UCL 0.677
95% Gamma Approximate UCL 0.665 95% KM (Percentile Bootstrap) UCL 0.176
Nu star 47.1 Potential UCLs to Use
AppChi2 32.35 95% KM (t) UCL 0.145
Theta star 0.718
Page 2 of 39
EXPOSED SOILS (0-0.5 FEET BGS)
Number of Distinct Detected Data 10 Number of Non-Detect Data 45
Minimum Detected 0.019 Minimum Detected -3.963
Maximum Non-Detect 7.5 Maximum Non-Detect 2.015
Mean -2.164
Assuming Normal Distribution Assuming Lognormal Distribution
Data appear Gamma Distributed at 5% Significance Level
95% KM (Percentile Bootstrap) UCL 0.175
Median 0.399 95% KM (Chebyshev) UCL 0.275
Mean 0.508
95% KM (bootstrap t) UCL 0.267
Maximum 1.6 95% KM (BCA) UCL 0.204
Minimum 0.019
Gamma ROS Statistics using Extrapolated Data 95% KM (jackknife) UCL 0.151
95% KM (z) UCL 0.162Assuming Gamma Distribution
95% KM (t) UCL 0.163
Data appear Gamma Distributed at 5% Significance Level SE of Mean 0.0418
5% K-S Critical Value 0.276 SD 0.251
K-S Test Statistic 0.757 Mean 0.0929
A-D Test Statistic 0.596 Nonparametric Statistics
5% A-D Critical Value 0.757 Kaplan-Meier (KM) Method
nu star 11.97
Theta Star 0.485
k star (bias corrected) 0.598
Gamma Distribution Test with Detected Values Only Data Distribution Test with Detected Values Only
95% BCA Bootstrap UCL 0.155
95% Percentile Bootstrap UCL 0.123
95% t UCL 0.117
SD in Original Scale 0.222
Mean in Original Scale 0.0667
SD in Log Scale 1.528
Mean in Log Scale -4.165MLE method failed to converge properly
Maximum Likelihood Estimate(MLE) Method N/A Log ROS Method
95% DL/2 (t) UCL 0.743 95% H-Stat (DL/2) UCL 2.133
SD 0.899 SD 1.971
Mean 0.541
DL/2 Substitution Method DL/2 Substitution Method
Data not Normal at 5% Significance Level Data appear Lognormal at 5% Significance Level
5% Shapiro Wilk Critical Value 0.842 5% Shapiro Wilk Critical Value 0.842
Shapiro Wilk Test Statistic 0.575 Shapiro Wilk Test Statistic 0.966
Normal Distribution Test with Detected Values Only Lognormal Distribution Test with Detected Values Only
UCL Statistics
Single DL Non-Detect Percentage 100.00%Observations < Largest ND are treated as NDs
Number treated as Detected 0For all methods (except KM, DL/2, and ROS Methods),
Number treated as Non-Detect 55Note: Data have multiple DLs - Use of KM Method is recommended
Minimum Non-Detect 0.015 Minimum Non-Detect -4.2
SD of Detected 0.474 SD of Detected 1.265
Mean of Detected 0.29 Mean of Detected -2.024
Maximum Detected 1.6 Maximum Detected 0.47
Raw Statistics Log-transformed Statistics
Percent Non-Detects 81.82%
Chemical (acenaphthene)
General Statistics
Number of Valid Data 55 Number of Detected Data 10
For additional insight, the user may want to consult a statistician.
These recommendations are based upon the results of the simulation studies summarized in Singh, Maichle, and Lee (2006).
Note: Suggestions regarding the selection of a 95% UCL are provided to help the user to select the most appropriate 95% UCL.
Note: DL/2 is not a recommended method.
95% Adjusted Gamma UCL 0.452
95% Gamma Approximate UCL 0.449
AppChi2 233.5 95% KM (t) UCL 0.25
Nu star 270.5 Potential UCLs to Use
99% KM (Chebyshev) UCL 0.561
Theta star 0.132
k star 2.941
Page 3 of 39
EXPOSED SOILS (0-0.5 FEET BGS)
Number of Detected Data 27
Note: DL/2 is not a recommended method.
Note: Suggestions regarding the selection of a 95% UCL are provided to help the user to select the most appropriate 95% UCL.
These recommendations are based upon the results of the simulation studies summarized in Singh, Maichle, and Lee (2006).
2.996
Raw Statistics Log-transformed Statistics
Minimum Detected 0.026 Minimum Detected -3.65
Gamma ROS Statistics using Extrapolated Data 95% KM (jackknife) UCL 2.991
95% KM (BCA) UCL 3.128
Minimum 0.026 95% KM (bootstrap t) UCL 3.302
Mean 3.634 95% KM (Percentile Bootstrap) UCL 3.075
Maximum 20
95% KM (t) UCL 3.01
Assuming Gamma Distribution 95% KM (z) UCL 2.994
SE of Mean 0.564Data appear Gamma Distributed at 5% Significance Level
5% K-S Critical Value 0.178 SD 4.078
Kaplan-Meier (KM) Method
K-S Test Statistic 0.804 Mean 2.067
5% A-D Critical Value 0.804
A-D Test Statistic 0.37 Nonparametric Statistics
nu star 26.91
Theta Star 8.16
k star (bias corrected) 0.498 Data appear Gamma Distributed at 5% Significance Level
Gamma Distribution Test with Detected Values Only Data Distribution Test with Detected Values Only
95% BCA Bootstrap UCL 3.188
95% Percentile Bootstrap UCL 2.994
95% t UCL 2.946
SD in Original Scale 4.113
Mean in Original Scale 2.018
SD in Log Scale 2.561
Maximum Likelihood Estimate(MLE) Method N/A
MLE method failed to converge properly Mean in Log Scale -1.805
Log ROS Method
95% DL/2 (t) UCL 3.212 95% H-Stat (DL/2) UCL 27.37
SD 4.122 SD 2.478
DL/2 Substitution Method
Mean 2.281 Mean -1.276
DL/2 Substitution Method
Assuming Normal Distribution Assuming Lognormal Distribution
Data not Normal at 5% Significance Level Data appear Lognormal at 5% Significance Level
5% Shapiro Wilk Critical Value 0.923 5% Shapiro Wilk Critical Value 0.923
Shapiro Wilk Test Statistic 0.786 Shapiro Wilk Test Statistic 0.941
Normal Distribution Test with Detected Values Only Lognormal Distribution Test with Detected Values Only
UCL Statistics
Observations < Largest ND are treated as NDs Single DL Non-Detect Percentage 96.36%
Number treated as Detected 2For all methods (except KM, DL/2, and ROS Methods),
Number treated as Non-Detect 53Note: Data have multiple DLs - Use of KM Method is recommended
Maximum Non-Detect 15 Maximum Non-Detect 2.708
Minimum Non-Detect 0.02 Minimum Non-Detect -3.912
SD of Detected 5.153 SD of Detected 1.91
Mean of Detected 4.067 Mean of Detected 0.223
Maximum Detected 20 Maximum Detected
Percent Non-Detects 50.91%
General Statistics
Number of Distinct Detected Data 27 Number of Non-Detect Data 28
Number of Valid Data 55
For additional insight, the user may want to consult a statistician.
Chemical (acenaphthylene)
95% Adjusted Gamma UCL 0.614
95% Gamma Approximate UCL 0.611
AppChi2 149.1 95% KM (t) UCL 0.163
Nu star 179 Potential UCLs to Use
Theta star 0.312
k star 1.627 99% KM (Chebyshev) UCL 0.509
SD 0.363 97.5% KM (Chebyshev) UCL 0.354
Page 4 of 39
EXPOSED SOILS (0-0.5 FEET BGS)Median 2.7 95% KM (Chebyshev) UCL 4.524
99% KM (Chebyshev) UCL 7.675
SD 3.793 97.5% KM (Chebyshev) UCL 5.587
4.731
Potential UCLs to Use
K-S Test Statistic 0.796 Mean 1.149
1.766
5% K-S Critical Value 0.209 SD 2.65
95% KM (bootstrap t) UCL 2.067
Assuming Gamma Distribution 95% KM (z) UCL 1.755
Gamma ROS Statistics using Extrapolated Data 95% KM (jackknife) UCL 1.748
Minimum 0.027
Data appear Gamma Distributed at 5% Significance Level SE of Mean 0.369
95% KM (t) UCL
5% A-D Critical Value 0.796 Kaplan-Meier (KM) Method
A-D Test Statistic 0.229 Nonparametric Statistics
nu star 19.45
Theta Star 6.189
k star (bias corrected) 0.512 Data appear Gamma Distributed at 5% Significance Level
Gamma Distribution Test with Detected Values Only Data Distribution Test with Detected Values Only
95% BCA Bootstrap UCL 1.905
95% Percentile Bootstrap UCL 1.727
95% t UCL 1.714
Mean in Original Scale 1.11
SD in Original Scale 2.677
MLE yields a negative mean Mean in Log Scale -3.002
SD in Log Scale 2.773
Maximum Likelihood Estimate(MLE) Method N/A Log ROS Method
SD 2.64
95% DL/2 (t) UCL 1.926 95% H-Stat (DL/2) UCL 10.41
SD 2.348
Mean 1.331 Mean -1.772
DL/2 Substitution Method DL/2 Substitution Method
Assuming Lognormal DistributionAssuming Normal Distribution
Data not Normal at 5% Significance Level Data appear Lognormal at 5% Significance Level
5% Shapiro Wilk Critical Value 0.901 5% Shapiro Wilk Critical Value 0.901
Shapiro Wilk Test Statistic 0.801 Shapiro Wilk Test Statistic 0.934
Normal Distribution Test with Detected Values Only Lognormal Distribution Test with Detected Values Only
UCL Statistics
Single DL Non-Detect Percentage 92.73%Observations < Largest ND are treated as NDs
Number treated as Detected 4For all methods (except KM, DL/2, and ROS Methods),
Number treated as Non-Detect 51Note: Data have multiple DLs - Use of KM Method is recommended
Maximum Non-Detect 5 Maximum Non-Detect 1.609
Minimum Non-Detect 0.01 Minimum Non-Detect -4.605
SD of Detected 3.829 SD of Detected 1.897
Mean of Detected 3.168 Mean of Detected 0.0525
Maximum Detected 13 Maximum Detected 2.565
Minimum Detected 0.027 Minimum Detected -3.612
Raw Statistics Log-transformed Statistics
Percent Non-Detects 65.45%
Number of Distinct Detected Data 18 Number of Non-Detect Data 36
General Statistics
Number of Valid Data 55 Number of Detected Data 19
Chemical (anthracene)
For additional insight, the user may want to consult a statistician.
These recommendations are based upon the results of the simulation studies summarized in Singh, Maichle, and Lee (2006).
Note: Suggestions regarding the selection of a 95% UCL are provided to help the user to select the most appropriate 95% UCL.
Note: DL/2 is not a recommended method.
95% Adjusted Gamma UCL
95% Gamma Approximate UCL 4.699
AppChi2 73.24 95% KM (t) UCL 3.01
Nu star 94.68
Theta star 4.223
k star 0.861
Page 5 of 39
EXPOSED SOILS (0-0.5 FEET BGS)
Mean 3.297 95% KM (Percentile Bootstrap) UCL 1.769
AppChi2 97.71 95% KM (t) UCL 1.766
78.00%
Number of Distinct Detected Data 11 Number of Non-Detect Data 39
Nonparametric Statistics
5% A-D Critical Value 0.776 Kaplan-Meier (KM) Method
5% K-S Critical Value 0.268 SD 7.911
95% KM (t) UCL 4.518
Data not Gamma Distributed at 5% Significance Level SE of Mean 1.173
K-S Test Statistic 0.776 Mean 2.55
A-D Test Statistic 0.831
nu star 10.37
Theta Star 20.54
Data Distribution Test with Detected Values Only
k star (bias corrected) 0.471 Data appear Lognormal at 5% Significance Level
Gamma Distribution Test with Detected Values Only
95% BCA Bootstrap UCL 5.861
95% Percentile Bootstrap UCL 4.285
95% t UCL 4.1
SD in Original Scale 8.088
Mean in Original Scale 2.182
SD in Log Scale 3.267
Log ROS Method
Mean in Log Scale -3.275MLE yields a negative mean
Maximum Likelihood Estimate(MLE) Method N/A
95% H-Stat (DL/2) UCL 1.713 95% DL/2 (t) UCL 4.315
SD 8.027 SD 1.153
Mean 2.412 Mean -0.541
Assuming Lognormal Distribution
DL/2 Substitution Method DL/2 Substitution Method
Assuming Normal Distribution
Data not Normal at 5% Significance Level Data appear Lognormal at 5% Significance Level
Shapiro Wilk Test Statistic 0.662
5% Shapiro Wilk Critical Value 0.85 5% Shapiro Wilk Critical Value 0.85
Shapiro Wilk Test Statistic 0.903
Normal Distribution Test with Detected Values Only Lognormal Distribution Test with Detected Values Only
UCL Statistics
Single DL Non-Detect Percentage 80.00%Observations < Largest ND are treated as NDs
Number treated as Detected 10For all methods (except KM, DL/2, and ROS Methods),
Number treated as Non-Detect 40Note: Data have multiple DLs - Use of KM Method is recommended
Maximum Non-Detect 0.75 Maximum Non-Detect -0.288
Minimum Non-Detect 0.5 Minimum Non-Detect -0.693
SD of Detected 15.53 SD of Detected 1.533
Mean of Detected 9.678 Mean of Detected 1.166
Maximum Detected 49.6 Maximum Detected 3.904
Minimum Detected 0.54 Minimum Detected -0.616
Raw Statistics Log-transformed Statistics
Percent Non-Detects
Number of Valid Data 50 Number of Detected Data 11
General Statistics
Chemical (antimony)
For additional insight, the user may want to consult a statistician.
These recommendations are based upon the results of the simulation studies summarized in Singh, Maichle, and Lee (2006).
Note: Suggestions regarding the selection of a 95% UCL are provided to help the user to select the most appropriate 95% UCL.
Note: DL/2 is not a recommended method.
95% Adjusted Gamma UCL 4.15
95% Gamma Approximate UCL 4.125
Nu star 122.2 Potential UCLs to Use
Theta star 2.967
k star 1.111 99% KM (Chebyshev) UCL 4.818
SD 2.705 97.5% KM (Chebyshev) UCL 3.452
Median 2.752 95% KM (Chebyshev) UCL 2.756
Maximum 13 95% KM (BCA) UCL 1.799
Page 6 of 39
EXPOSED SOILS (0-0.5 FEET BGS)
Gamma ROS Statistics using Extrapolated Data 95% KM (jackknife) UCL 4.303
7.665
Mean 7.692 95% KM (Percentile Bootstrap) UCL 4.764
Maximum Likelihood Estimate(MLE) Method Log ROS Method
SD in Log Scale 0.624
Mean 3.316 Mean in Log Scale 1.019
95% MLE (Tiku) UCL 3.811 SD in Original Scale 2.16
95% Percentile Bootstrap UCL 3.872
95% t UCL 3.847
3.85
Nonparametric Statistics
k star (bias corrected) 2.9
95% KM (z) UCL 3.84
Gamma ROS Statistics using Extrapolated Data 95% KM (jackknife) UCL 3.849
Assuming Gamma Distribution
Data appear Gamma Distributed at 5% Significance Level SE of Mean 0.305
95% KM (t) UCL
5% K-S Critical Value 0.127 SD 2.134
K-S Test Statistic 0.756 Mean 3.339
5% A-D Critical Value 0.756 Kaplan-Meier (KM) Method
A-D Test Statistic 0.555
nu star 284.2
Data appear Gamma Distributed at 5% Significance Level
Theta Star 1.169
Gamma Distribution Test with Detected Values Only Data Distribution Test with Detected Values Only
95% BCA Bootstrap UCL 3.898
95% MLE (t) UCL 3.831 Mean in Original Scale 3.335
SD 2.17
95% H-Stat (DL/2) UCL 4.088 95% DL/2 (t) UCL 3.844
SD 2.167 SD 0.652
Mean 3.33 Mean 1.009
Assuming Normal Distribution
DL/2 Substitution Method DL/2 Substitution Method
Assuming Lognormal Distribution
Data not Normal at 5% Significance Level Data appear Lognormal at 5% Significance Level
5% Shapiro Wilk Critical Value 0.947 5% Shapiro Wilk Critical Value 0.947
Shapiro Wilk Test Statistic 0.846 Shapiro Wilk Test Statistic 0.977
Normal Distribution Test with Detected Values Only Lognormal Distribution Test with Detected Values Only
UCL Statistics
Maximum Non-Detect 0.75 Maximum Non-Detect -0.288
SD of Detected 2.146
Minimum Non-Detect 0.75 Minimum Non-Detect -0.288
SD of Detected 0.591
Maximum Detected 10.4
Mean of Detected 3.39 Mean of Detected 1.05
Maximum Detected 2.342
Log-transformed Statistics
Minimum Detected 0.807
Raw Statistics
Minimum Detected -0.214
Percent Non-Detects 2.00%
Number of Distinct Detected Data 47 Number of Non-Detect Data 1
Number of Valid Data 50 Number of Detected Data 49
General Statistics
Chemical (arsenic)
For additional insight, the user may want to consult a statistician.
These recommendations are based upon the results of the simulation studies summarized in Singh, Maichle, and Lee (2006).
Note: DL/2 is not a recommended method.
Note: Suggestions regarding the selection of a 95% UCL are provided to help the user to select the most appropriate 95% UCL.
95% Adjusted Gamma UCL 14.55
95% Gamma Approximate UCL 14.28
AppChi2 10.57 95% KM (Chebyshev) UCL 7.665
Nu star 19.61 Potential UCLs to Use
Theta star 39.22
k star 0.196 99% KM (Chebyshev) UCL 14.23
SD 8.128 97.5% KM (Chebyshev) UCL 9.878
Median 7.246 95% KM (Chebyshev) UCL
Maximum 49.6 95% KM (BCA) UCL 5.08
Minimum 1E-12 95% KM (bootstrap t) UCL 8.901
Assuming Gamma Distribution 95% KM (z) UCL 4.48
Page 7 of 39
EXPOSED SOILS (0-0.5 FEET BGS)
95% KM (BCA) UCL 3.865
95% KM (BCA) UCL 3.865
k star 0.781
Shapiro Wilk Critical Value 0.947 Shapiro Wilk Critical Value 0.947
95% Adjusted-CLT UCL (Chen-1995) 107.8 97.5% Chebyshev (MVUE) UCL 135.8
95% Bootstrap-t UCL 107.8
Adjusted Level of Significance 0.0452 95% CLT UCL 107.8
95% Adjusted Gamma UCL 109.5
These recommendations are based upon the results of the simulation studies summarized in Singh, Singh, and Iaci (2002)
and Singh and Singh (2003). For additional insight, the user may want to consult a statistician.
Note: Suggestions regarding the selection of a 95% UCL are provided to help the user to select the most appropriate 95% UCL.
Potential UCL to Use Use 95% Student's-t UCL 107.9
95% Approximate Gamma UCL 109.2
99% Chebyshev(Mean, Sd) UCL 145Assuming Gamma Distribution
Data not Gamma Distributed at 5% Significance Level 95% Chebyshev(Mean, Sd) UCL 119.9
97.5% Chebyshev(Mean, Sd) UCL 128.4
Kolmogorov-Smirnov 5% Critical Value 0.125 95% BCA Bootstrap UCL 108.3
Kolmogorov-Smirnov Test Statistic 0.166 95% Percentile Bootstrap UCL 107.5
Anderson-Darling 5% Critical Value 0.751 95% Hall's Bootstrap UCL 108.3
Anderson-Darling Test Statistic 0.979
95% Standard Bootstrap UCL 107.7
Adjusted Chi Square Value 737.7 95% Jackknife UCL 107.9
nu star 804.3
Approximate Chi Square Value (.05) 739.5 Nonparametric Statistics
MLE of Standard Deviation 35.4
MLE of Mean 100.4
Theta Star 12.48
k star (bias corrected) 8.043 Data appear Normal at 5% Significance Level
Gamma Distribution Test Data Distribution
95% Modified-t UCL (Johnson-1978) 107.9 99% Chebyshev (MVUE) UCL 156.3
95% UCLs (Adjusted for Skewness) 95% Chebyshev (MVUE) UCL 125.4
95% Student's-t UCL 107.9 95% H-UCL 111.8
Assuming Normal Distribution Assuming Lognormal Distribution
Data appear Normal at 5% Significance Level Data not Lognormal at 5% Significance Level
Relevant UCL Statistics
Shapiro Wilk Test Statistic 0.982 Shapiro Wilk Test Statistic 0.913
Normal Distribution Test Lognormal Distribution Test
Skewness -0.00217
Coefficient of Variation 0.316
SD 31.7
Median 105.5 SD of log Data 0.375
Maximum of Log Data 5.252
Mean 100.4 Mean of log Data 4.549
Maximum 191
Raw Statistics
Minimum 24.8 Minimum of Log Data 3.211
Log-transformed Statistics
Number of Valid Observations 50 Number of Distinct Observations 40
General Statistics
Chemical (barium)
For additional insight, the user may want to consult a statistician.
These recommendations are based upon the results of the simulation studies summarized in Singh, Maichle, and Lee (2006).
Note: Suggestions regarding the selection of a 95% UCL are provided to help the user to select the most appropriate 95% UCL.
95% Adjusted Gamma UCL 4.455
Note: DL/2 is not a recommended method.
95% Gamma Approximate UCL 4.418
AppChi2 58.74
Nu star 78.1 Potential UCLs to Use
99% KM (Chebyshev) UCL 6.372
Theta star 4.254
SD 2.178 97.5% KM (Chebyshev) UCL 5.243
Median 2.815 95% KM (Chebyshev) UCL 4.668
Mean 3.323 95% KM (Percentile Bootstrap) UCL 3.838
Maximum 10.4
Minimum 1E-12 95% KM (bootstrap t) UCL 3.96
Page 8 of 39
EXPOSED SOILS (0-0.5 FEET BGS)
Maximum Non-Detect 0.5 Maximum Non-Detect -0.693
95% BCA Bootstrap UCL 0.0143
95% Percentile Bootstrap UCL 0.0118
k star (bias corrected) 0.466 Data do not follow a Discernable Distribution (0.05)
Theta Star 0.0302
0.0124
5% K-S Critical Value 0.188 SD 0.0214
For additional insight, the user may want to consult a statistician.
Note: Suggestions regarding the selection of a 95% UCL are provided to help the user to select the most appropriate 95% UCL.
These recommendations are based upon the results of the simulation studies summarized in Singh, Maichle, and Lee (2006).
Note: DL/2 is not a recommended method.
95% Adjusted Gamma UCL 0.0373
95% Gamma Approximate UCL 0.0365
AppChi2 6.001 95% KM (BCA) UCL 0.0135
Nu star 13.16 Potential UCLs to Use
Theta star 0.139
97.5% KM (Chebyshev) UCL 0.0263
k star 0.12 99% KM (Chebyshev) UCL 0.0376
SD 0.0296
Median 0.0018 95% KM (Chebyshev) UCL 0.0206
Mean 0.0166 95% KM (Percentile Bootstrap) UCL 0.0128
Maximum 0.13 95% KM (BCA) UCL 0.0135
Minimum 1E-12 95% KM (bootstrap t) UCL 0.0249
Gamma ROS Statistics using Extrapolated Data 95% KM (jackknife) UCL 0.0122
95% KM (z) UCL 0.0123Assuming Gamma Distribution
95% KM (t) UCL
Data not Gamma Distributed at 5% Significance Level SE of Mean 0.00305
K-S Test Statistic 0.806 Mean 0.00727
Nonparametric Statistics
5% A-D Critical Value 0.806 Kaplan-Meier (KM) Method
A-D Test Statistic 2.751
nu star 22.35
Gamma Distribution Test with Detected Values Only Data Distribution Test with Detected Values Only
SD in Original Scale 0.0211
95% t UCL 0.0114
SD in Log Scale 1.711
Mean in Original Scale 0.00668
Mean in Log Scale -6.781MLE method failed to converge properly
Maximum Likelihood Estimate(MLE) Method N/A Log ROS Method
95% DL/2 (t) UCL 0.0354 95% H-Stat (DL/2) UCL 0.0395
SD 0.0591 SD 1.831
Mean 0.022 Mean -5.771
Assuming Normal Distribution Assuming Lognormal Distribution
DL/2 Substitution Method DL/2 Substitution Method
Data not Normal at 5% Significance Level Data not Lognormal at 5% Significance Level
5% Shapiro Wilk Critical Value 0.916 5% Shapiro Wilk Critical Value 0.916
Shapiro Wilk Test Statistic 0.48 Shapiro Wilk Test Statistic 0.853
UCL Statistics
Normal Distribution Test with Detected Values Only Lognormal Distribution Test with Detected Values Only
Observations < Largest ND are treated as NDs Single DL Non-Detect Percentage 100.00%
Note: Data have multiple DLs - Use of KM Method is recommended Number treated as Non-Detect 55
For all methods (except KM, DL/2, and ROS Methods), Number treated as Detected 0
SD of Detected 1.408
Minimum Non-Detect 0.00024 Minimum Non-Detect -8.335
SD of Detected 0.0307
Mean of Detected 0.014 Mean of Detected -5.534
Maximum Detected 0.13 Maximum Detected -2.04
Raw Statistics
Minimum Detected 0.00077 Minimum Detected -7.169
Log-transformed Statistics
Percent Non-Detects 56.36%
Number of Distinct Detected Data 20 Number of Non-Detect Data 31
Number of Valid Data 55 Number of Detected Data 24
General Statistics
Chemical (benzene)
Page 9 of 39
EXPOSED SOILS (0-0.5 FEET BGS)
0.925
Observations < Largest ND are treated as NDs
Note: Data have multiple DLs - Use of KM Method is recommended
For all methods (except KM, DL/2, and ROS Methods),
5% Shapiro Wilk Critical Value 0.943 5% Shapiro Wilk Critical Value 0.943
DL/2 Substitution Method DL/2 Substitution Method
95% DL/2 (t) UCL 10.91 95% H-Stat (DL/2) UCL 263.4
Data appear Gamma Distributed at 5% Significance Level
These recommendations are based upon the results of the simulation studies summarized in Singh, Maichle, and Lee (2006).
Note: Suggestions regarding the selection of a 95% UCL are provided to help the user to select the most appropriate 95% UCL.
Note: DL/2 is not a recommended method.
95% Adjusted Gamma UCL 17.26
95% Gamma Approximate UCL 16.88
AppChi2 5.751 95% KM (Chebyshev) UCL 16.26
Nu star 12.79 Potential UCLs to Use
Theta star 65.29
k star 0.116 99% KM (Chebyshev) UCL 27.38
Median 0.38
SD 14.71 97.5% KM (Chebyshev) UCL 20.01
95% KM (Chebyshev) UCL 16.26
Maximum 83
Mean 7.59 95% KM (Percentile Bootstrap) UCL 11.08
95% KM (BCA) UCL 11.07
Gamma ROS Statistics using Extrapolated Data
Minimum 1E-12 95% KM (bootstrap t) UCL 12.67
95% KM (jackknife) UCL 10.91
Assuming Gamma Distribution 95% KM (z) UCL 10.86
95% KM (t) UCL 10.92
SE of Mean 1.989Data appear Gamma Distributed at 5% Significance Level
Mean 7.592
5% K-S Critical Value 0.145 SD 14.58
K-S Test Statistic 0.847
Nonparametric Statistics
5% A-D Critical Value 0.847 Kaplan-Meier (KM) Method
A-D Test Statistic 0.824
nu star 29.76
Theta Star 28.05
k star (bias corrected) 0.346
Gamma Distribution Test with Detected Values Only Data Distribution Test with Detected Values Only
95% BCA Bootstrap UCL 11.86
95% Percentile Bootstrap UCL 11.09
95% t UCL 10.91
SD in Original Scale 14.71
Mean in Original Scale 7.592
SD in Log Scale 3.033
Mean in Log Scale -0.662MLE yields a negative mean
Maximum Likelihood Estimate(MLE) Method N/A Log ROS Method
SD 14.71 SD 2.872
Mean 7.595 Mean -0.54
Assuming Normal Distribution Assuming Lognormal Distribution
Data not Normal at 5% Significance Level Data not Lognormal at 5% Significance Level
UCL Statistics
Normal Distribution Test with Detected Values Only Lognormal Distribution Test with Detected Values Only
Shapiro Wilk Test Statistic 0.657 Shapiro Wilk Test Statistic
Single DL Non-Detect Percentage 47.27%
Number treated as Detected 29
Number treated as Non-Detect 26
Maximum Non-Detect 0.33 Maximum Non-Detect -1.109
Minimum Non-Detect 0.02 Minimum Non-Detect -3.912
SD of Detected 16.04 SD of Detected 2.506
Mean of Detected 9.704 Mean of Detected 0.384
Maximum Detected 83 Maximum Detected 4.419
Minimum Detected 0.013 Minimum Detected -4.343
Raw Statistics Log-transformed Statistics
Percent Non-Detects 21.82%
Number of Detected Data 43
Number of Distinct Detected Data 39 Number of Non-Detect Data 12
Number of Valid Data 55
General Statistics
Chemical (benzo(a)anthracene)
Page 10 of 39
EXPOSED SOILS (0-0.5 FEET BGS)
Number of Non-Detect Data 9
Number of Valid Data 55 Number of Detected Data 46
Minimum Detected 0.028 Minimum Detected -3.576
-3.912
SD of Detected 24.77 SD of Detected 2.641
Shapiro Wilk Test Statistic 0.702 Shapiro Wilk Test Statistic 0.907
Mean in Log Scale -0.105
95% DL/2 (t) UCL 18.71
Mean 13.42 95% KM (Percentile Bootstrap) UCL 18.99
97.5% KM (Chebyshev) UCL 33.16
Median 0.95 95% KM (Chebyshev) UCL 27.2
Theta star 105.5
Potential UCLs to Use
AppChi2 6.569 99% KM (Chebyshev) UCL 44.87
Note: DL/2 is not a recommended method.
Note: Suggestions regarding the selection of a 95% UCL are provided to help the user to select the most appropriate 95% UCL.
95% Adjusted Gamma UCL 29.21
95% Gamma Approximate UCL 28.6
Nu star 14
k star 0.127 99% KM (Chebyshev) UCL 44.87
SD 23.39
95% KM (bootstrap t) UCL 19.86
Maximum 110 95% KM (BCA) UCL 19.04
Minimum 1E-12
Gamma ROS Statistics using Extrapolated Data 95% KM (jackknife) UCL 18.71
95% KM (z) UCL 18.63Assuming Gamma Distribution
Data not Gamma Distributed at 5% Significance Level SE of Mean 3.159
95% KM (t) UCL 18.72
Mean 13.43
5% K-S Critical Value 0.141 SD 23.18
K-S Test Statistic 0.854
5% A-D Critical Value 0.854 Kaplan-Meier (KM) Method
A-D Test Statistic 1.006 Nonparametric Statistics
nu star 29.96
Theta Star 49.27
k star (bias corrected) 0.326 Data do not follow a Discernable Distribution (0.05)
Gamma Distribution Test with Detected Values Only Data Distribution Test with Detected Values Only
95% BCA Bootstrap UCL 19.67
95% Percentile Bootstrap UCL 18.9
95% t UCL 18.7
95% MLE (t) UCL 9.423
95% MLE (Tiku) UCL 10.68 SD in Original Scale 23.39
Mean in Original Scale 13.43
SD 35.07 SD in Log Scale 3.136
Mean 1.509
Maximum Likelihood Estimate(MLE) Method Log ROS Method
95% H-Stat (DL/2) UCL 659.1
SD 23.39 SD 2.958
Mean 13.43 Mean 0.016
Assuming Normal Distribution Assuming Lognormal Distribution
DL/2 Substitution Method DL/2 Substitution Method
Data not Normal at 5% Significance Level Data not Lognormal at 5% Significance Level
5% Shapiro Wilk Critical Value 0.945 5% Shapiro Wilk Critical Value 0.945
Normal Distribution Test with Detected Values Only Lognormal Distribution Test with Detected Values Only
UCL Statistics
Single DL Non-Detect Percentage 43.64%Observations < Largest ND are treated as NDs
Number treated as Detected 31For all methods (except KM, DL/2, and ROS Methods),
Number treated as Non-Detect 24Note: Data have multiple DLs - Use of KM Method is recommended
Maximum Non-Detect 0.33 Maximum Non-Detect -1.109
Minimum Non-Detect 0.02 Minimum Non-Detect
Mean of Detected 16.05 Mean of Detected 0.739
Maximum Detected 110 Maximum Detected 4.7
Raw Statistics Log-transformed Statistics
General Statistics
Percent Non-Detects 16.36%
Number of Distinct Detected Data 42
Chemical (benzo(a)pyrene)
For additional insight, the user may want to consult a statistician.
Page 11 of 39
EXPOSED SOILS (0-0.5 FEET BGS)
Maximum of Log Data 5.136
Raw Statistics Log-transformed Statistics
Nonparametric Statistics
MLE of Mean 19.09
95% Percentile Bootstrap UCL 26.67
Anderson-Darling 5% Critical Value 0.874 95% Hall's Bootstrap UCL 28.86
Data not Gamma Distributed at 5% Significance Level 95% Chebyshev(Mean, Sd) UCL 38.99
97.5% Chebyshev(Mean, Sd) UCL 47.6
47.6
95% Adjusted Gamma UCL 31.4
Number of Detected Data 46
Chemical (benzo(b)fluoranthene)
SD of Detected 2.692
Minimum Non-Detect 0.02 Minimum Non-Detect -3.912
SD of Detected 32.48
Mean of Detected 18.14 Mean of Detected 0.738
Maximum Detected 180 Maximum Detected 5.193
Raw Statistics Log-transformed Statistics
Minimum Detected 0.023 Minimum Detected -3.772
Percent Non-Detects 16.36%
General Statistics
Number of Distinct Detected Data 38 Number of Non-Detect Data 9
Number of Valid Data 55
and Singh and Singh (2003). For additional insight, the user may want to consult a statistician.
These recommendations are based upon the results of the simulation studies summarized in Singh, Singh, and Iaci (2002)
Note: Suggestions regarding the selection of a 95% UCL are provided to help the user to select the most appropriate 95% UCL.
Potential UCL to Use Use 97.5% Chebyshev (Mean, Sd) UCL
Assuming Gamma Distribution 99% Chebyshev(Mean, Sd) UCL 64.51
95% Approximate Gamma UCL 30.98
Kolmogorov-Smirnov 5% Critical Value 0.131 95% BCA Bootstrap UCL 28.72
Kolmogorov-Smirnov Test Statistic 0.183
95% Standard Bootstrap UCL 26.53
Anderson-Darling Test Statistic 1.718 95% Bootstrap-t UCL 29.73
Adjusted Chi Square Value 18.22 95% Jackknife UCL 26.73
Adjusted Level of Significance 0.0456 95% CLT UCL 26.6
Approximate Chi Square Value (.05) 18.47
nu star 29.97
MLE of Standard Deviation 36.58
Theta Star 70.08
k star (bias corrected) 0.272 Data appear Lognormal at 5% Significance Level
Gamma Distribution Test Data Distribution
95% Modified-t UCL (Johnson-1978) 26.98 99% Chebyshev (MVUE) UCL 533.6
95% Adjusted-CLT UCL (Chen-1995) 28.22 97.5% Chebyshev (MVUE) UCL 362
95% Chebyshev (MVUE) UCL 274.7 95% UCLs (Adjusted for Skewness)
Assuming Lognormal Distribution
95% Student's-t UCL 26.73
Assuming Normal Distribution
95% H-UCL 777.8
Data appear Lognormal at 5% Significance LevelData not Normal at 5% Significance Level
Lilliefors Test Statistic 0.287
Lilliefors Critical Value 0.119 Lilliefors Critical Value 0.119
Lilliefors Test Statistic 0.119
Normal Distribution Test Lognormal Distribution Test
Relevant UCL Statistics
Skewness 2.466
Coefficient of Variation 1.773
SD 33.85
Median 1.306 SD of log Data 2.904
Mean 19.09 Mean of log Data 0.409
Maximum 170.1
Minimum 0.0175 Minimum of Log Data -4.046
General Statistics
Number of Valid Observations 55 Number of Distinct Observations 50
Chemical (benzo(a)pyrene equivalent)
For additional insight, the user may want to consult a statistician.
These recommendations are based upon the results of the simulation studies summarized in Singh, Maichle, and Lee (2006).
Page 12 of 39
EXPOSED SOILS (0-0.5 FEET BGS)
Number treated as Detected 29
95% BCA Bootstrap UCL 23.92
95% Percentile Bootstrap UCL 22.57
k star (bias corrected) 0.31 Data do not follow a Discernable Distribution (0.05)
Theta Star 58.49
15.18
Nonparametric Statistics
5% A-D Critical Value 0.858 Kaplan-Meier (KM) Method
95% KM (Chebyshev) UCL 33.09
Mean 15.18 95% KM (Percentile Bootstrap) UCL 22.61
SD of Detected 2.645SD of Detected 32.91
Mean of Detected 22.49 Mean of Detected 1.111
Maximum Detected 140 Maximum Detected 4.942
Minimum Detected 0.03 Minimum Detected -3.507
Raw Statistics Log-transformed Statistics
Percent Non-Detects 16.36%
Number of Distinct Detected Data 44 Number of Non-Detect Data 9
Number of Valid Data 55
General Statistics
Number of Detected Data 46
Chemical (benzo(g,h,i)perylene)
For additional insight, the user may want to consult a statistician.
These recommendations are based upon the results of the simulation studies summarized in Singh, Maichle, and Lee (2006).
Note: Suggestions regarding the selection of a 95% UCL are provided to help the user to select the most appropriate 95% UCL.
Note: DL/2 is not a recommended method.
95% Adjusted Gamma UCL 33.26
95% Gamma Approximate UCL 32.56
Potential UCLs to UseNu star 13.79
AppChi2 6.426 99% KM (Chebyshev) UCL 56.05
Theta star 121.1
k star 0.125 99% KM (Chebyshev) UCL 56.05
SD 30.41 97.5% KM (Chebyshev) UCL 40.84
Median 1
Maximum 180 95% KM (BCA) UCL 22.39
Minimum 1E-12 95% KM (bootstrap t) UCL 25.66
Gamma ROS Statistics using Extrapolated Data 95% KM (jackknife) UCL 22.04
95% KM (z) UCL 21.94Assuming Gamma Distribution
95% KM (t) UCL 22.06
SE of Mean 4.108Data not Gamma Distributed at 5% Significance Level
5% K-S Critical Value 0.141 SD 30.13
K-S Test Statistic 0.858 Mean
A-D Test Statistic 1.029
nu star 28.54
Gamma Distribution Test with Detected Values Only Data Distribution Test with Detected Values Only
SD in Original Scale 30.41
95% t UCL 22.04
Mean in Original Scale 15.18
SD in Log Scale 3.196
Log ROS Method
Mean in Log Scale -0.122MLE yields a negative mean
Maximum Likelihood Estimate(MLE) Method N/A
95% H-Stat (DL/2) UCL 772.5 95% DL/2 (t) UCL 22.05
SD 30.41 SD 2.996
Mean 15.18 Mean 0.0147
DL/2 Substitution Method DL/2 Substitution Method
Assuming Normal Distribution Assuming Lognormal Distribution
Data not Normal at 5% Significance Level Data not Lognormal at 5% Significance Level
5% Shapiro Wilk Critical Value 0.945 5% Shapiro Wilk Critical Value 0.945
Lognormal Distribution Test with Detected Values Only
Shapiro Wilk Test Statistic 0.617
Normal Distribution Test with Detected Values Only
Shapiro Wilk Test Statistic 0.916
UCL Statistics
Observations < Largest ND are treated as NDs Single DL Non-Detect Percentage 47.27%
For all methods (except KM, DL/2, and ROS Methods),
Note: Data have multiple DLs - Use of KM Method is recommended Number treated as Non-Detect 26
Maximum Non-Detect 0.33 Maximum Non-Detect -1.109
Page 13 of 39
EXPOSED SOILS (0-0.5 FEET BGS)
Shapiro Wilk Test Statistic 0.728 Shapiro Wilk Test Statistic 0.907
Data not Normal at 5% Significance Level Data not Lognormal at 5% Significance Level
nu star 30.39
K-S Test Statistic 0.853 Mean 18.81
25.86
5% K-S Critical Value 0.141 SD 30.9
95% KM (BCA) UCL 25.53
95% KM (z) UCL 25.74
Maximum Detected 5.394
Mean of Detected 16.08 Mean of Detected 0.607
Maximum Detected 220
Minimum Detected 0.02 Minimum Detected -3.912
Raw Statistics Log-transformed Statistics
Percent Non-Detects 20.00%
Number of Distinct Detected Data 41 Number of Non-Detect Data 11
Number of Valid Data 55 Number of Detected Data 44
General Statistics
Chemical (benzo(k)fluoranthene)
For additional insight, the user may want to consult a statistician.
These recommendations are based upon the results of the simulation studies summarized in Singh, Maichle, and Lee (2006).
Note: Suggestions regarding the selection of a 95% UCL are provided to help the user to select the most appropriate 95% UCL.
Note: DL/2 is not a recommended method.
95% Adjusted Gamma UCL 40.99
95% Gamma Approximate UCL 40.13
AppChi2 6.538 99% KM (Chebyshev) UCL 60.73
Nu star 13.95 Potential UCLs to Use
Theta star 148.3
k star 0.127 99% KM (Chebyshev) UCL 60.73
SD 31.19 97.5% KM (Chebyshev) UCL 45.12
Median 1.1 95% KM (Chebyshev) UCL 37.18
Mean 18.81 95% KM (Percentile Bootstrap) UCL 26
Maximum 140
Minimum 1E-12 95% KM (bootstrap t) UCL 27.5
Assuming Gamma Distribution
Gamma ROS Statistics using Extrapolated Data 95% KM (jackknife) UCL 25.85
Data not Gamma Distributed at 5% Significance Level SE of Mean 4.213
95% KM (t) UCL
A-D Test Statistic 1.037 Nonparametric Statistics
5% A-D Critical Value 0.853 Kaplan-Meier (KM) Method
k star (bias corrected) 0.33 Data do not follow a Discernable Distribution (0.05)
Theta Star 68.07
Gamma Distribution Test with Detected Values Only Data Distribution Test with Detected Values Only
95% BCA Bootstrap UCL 25.97
95% Percentile Bootstrap UCL 25.73
95% t UCL 25.85
95% MLE (Tiku) UCL 16.66 SD in Original Scale 31.19
95% MLE (t) UCL 15.42 Mean in Original Scale 18.81
SD 44.8 SD in Log Scale 3.166
Mean 5.309 Mean in Log Scale 0.24
Maximum Likelihood Estimate(MLE) Method Log ROS Method
95% DL/2 (t) UCL 25.85 95% H-Stat (DL/2) UCL 1281
SD 31.19 SD 3.04
Mean 18.81 Mean 0.327
Assuming Normal Distribution Assuming Lognormal Distribution
DL/2 Substitution Method DL/2 Substitution Method
UCL Statistics
5% Shapiro Wilk Critical Value 0.945 5% Shapiro Wilk Critical Value 0.945
Normal Distribution Test with Detected Values Only Lognormal Distribution Test with Detected Values Only
Observations < Largest ND are treated as NDs Single DL Non-Detect Percentage 40.00%
Number treated as Detected 33For all methods (except KM, DL/2, and ROS Methods),
Number treated as Non-Detect 22Note: Data have multiple DLs - Use of KM Method is recommended
Maximum Non-Detect -1.109Maximum Non-Detect 0.33
Minimum Non-Detect 0.02 Minimum Non-Detect -3.912
Page 14 of 39
EXPOSED SOILS (0-0.5 FEET BGS)
DL/2 Substitution Method
Data not Normal at 5% Significance Level Data not Lognormal at 5% Significance Level
95% H-Stat (DL/2) UCL 489.1
SD 33.54 SD 2.962
SD in Log Scale 3.152
Maximum Likelihood Estimate(MLE) Method N/A Log ROS Method
95% BCA Bootstrap UCL 24.48
95% Percentile Bootstrap UCL 21.06
Mean 12.87
Nonparametric Statistics
5% A-D Critical Value 0.857 Kaplan-Meier (KM) Method
Raw Statistics Log-transformed Statistics
Minimum Detected 0.159 Minimum Detected -1.839
Maximum Detected 0.504 Maximum Detected -0.685
Percent Non-Detects 74.00%
Number of Distinct Detected Data 13 Number of Non-Detect Data 37
Number of Valid Data 50 Number of Detected Data 13
General Statistics
Chemical (beryllium)
For additional insight, the user may want to consult a statistician.
These recommendations are based upon the results of the simulation studies summarized in Singh, Maichle, and Lee (2006).
Note: Suggestions regarding the selection of a 95% UCL are provided to help the user to select the most appropriate 95% UCL.
Note: DL/2 is not a recommended method.
95% Adjusted Gamma UCL 29.76
95% Gamma Approximate UCL 29.09
AppChi2 5.471 95% KM (Chebyshev) UCL 32.63
Nu star 12.37 Potential UCLs to Use
Theta star 114.4
k star 0.112 99% KM (Chebyshev) UCL 57.98
SD 33.54 97.5% KM (Chebyshev) UCL 41.18
Median 0.61 95% KM (Chebyshev) UCL 32.63
Mean 12.87 95% KM (Percentile Bootstrap) UCL 20.94
Maximum 220 95% KM (BCA) UCL 22.23
Minimum 1E-12 95% KM (bootstrap t) UCL 29.82
Assuming Gamma Distribution 95% KM (z) UCL 20.33
Gamma ROS Statistics using Extrapolated Data 95% KM (jackknife) UCL 20.44
95% KM (t) UCL 20.46
SE of Mean 4.533Data follow Appr. Gamma Distribution at 5% Significance Level
5% K-S Critical Value 0.145 SD 33.23
K-S Test Statistic 0.857
A-D Test Statistic 0.98
nu star 27.17
Theta Star 52.09
k star (bias corrected) 0.309 Data Follow Appr. Gamma Distribution at 5% Significance Level
Gamma Distribution Test with Detected Values Only Data Distribution Test with Detected Values Only
95% t UCL 20.44
SD in Original Scale 33.54
Mean in Original Scale 12.87
MLE yields a negative mean Mean in Log Scale -0.436
95% DL/2 (t) UCL 20.44
Assuming Normal Distribution
Mean 12.88 Mean -0.297
Assuming Lognormal Distribution
DL/2 Substitution Method
5% Shapiro Wilk Critical Value 0.944 5% Shapiro Wilk Critical Value 0.944
Lognormal Distribution Test with Detected Values Only
Shapiro Wilk Test Statistic 0.479 Shapiro Wilk Test Statistic 0.943
Normal Distribution Test with Detected Values Only
UCL Statistics
Single DL Non-Detect Percentage 47.27%Observations < Largest ND are treated as NDs
Number treated as Detected 29For all methods (except KM, DL/2, and ROS Methods),
Number treated as Non-Detect 26Note: Data have multiple DLs - Use of KM Method is recommended
Maximum Non-Detect 0.33 Maximum Non-Detect -1.109
SD of Detected 2.549
Minimum Non-Detect 0.01 Minimum Non-Detect -4.605
SD of Detected 36.88
Page 15 of 39
EXPOSED SOILS (0-0.5 FEET BGS)
Note: Data have multiple DLs - Use of KM Method is recommended
For all methods (except KM, DL/2, and ROS Methods),
5% Shapiro Wilk Critical Value 0.866
UCL Statistics
Normal Distribution Test with Detected Values Only Lognormal Distribution Test with Detected Values Only
Shapiro Wilk Test Statistic 0.828 Shapiro Wilk Test Statistic 0.931
Mean -1.946
Assuming Normal Distribution Assuming Lognormal Distribution
DL/2 Substitution Method DL/2 Substitution Method
95% DL/2 (t) UCL 0.172 95% H-Stat (DL/2) UCL 0.167
0.065
95% MLE (t) UCL 0.0943 Mean in Original Scale 0.198
nu star 199.9
K-S Test Statistic 0.734 Mean 0.199
0.215
5% K-S Critical Value 0.237 SD 0.0571
95% KM (bootstrap t) UCL 0.22
Assuming Gamma Distribution 95% KM (z) UCL 0.215
Gamma ROS Statistics using Extrapolated Data 95% KM (jackknife) UCL 0.215
99% KM (Chebyshev) UCL 0.294
Mean 0.256 95% KM (Percentile Bootstrap) UCL 0.216
Number of Detected Data 5
For additional insight, the user may want to consult a statistician.
Chemical (cadmium)
Minimum Detected 0.173 Minimum Detected -1.754
Raw Statistics Log-transformed Statistics
Percent Non-Detects 90.00%
Number of Distinct Detected Data 5 Number of Non-Detect Data 45
Number of Valid Data 50
General Statistics
These recommendations are based upon the results of the simulation studies summarized in Singh, Maichle, and Lee (2006).
Note: Suggestions regarding the selection of a 95% UCL are provided to help the user to select the most appropriate 95% UCL.
Note: DL/2 is not a recommended method.
95% Adjusted Gamma UCL 0.276
95% Gamma Approximate UCL 0.276
Potential UCLs to Use
AppChi2 918.2 95% KM (t) UCL 0.215
Nu star 990.2
Theta star 0.0258
k star 9.902
SD 0.0753 97.5% KM (Chebyshev) UCL 0.259
Median 0.265 95% KM (Chebyshev) UCL 0.241
Maximum 0.504 95% KM (BCA) UCL 0.217
Minimum 0.077
Data appear Gamma Distributed at 5% Significance Level SE of Mean 0.00959
95% KM (t) UCL
A-D Test Statistic 0.441 Nonparametric Statistics
5% A-D Critical Value 0.734 Kaplan-Meier (KM) Method
Theta Star 0.0328
k star (bias corrected) 7.689 Data appear Gamma Distributed at 5% Significance Level
Gamma Distribution Test with Detected Values Only Data Distribution Test with Detected Values Only
95% BCA Bootstrap UCL 0.214
95% Percentile Bootstrap UCL 0.213
95% t UCL 0.213
95% MLE (Tiku) UCL 0.198 SD in Original Scale
SD 0.164 SD in Log Scale 0.282
Mean 0.0555 Mean in Log Scale -1.664
Maximum Likelihood Estimate(MLE) Method Log ROS Method
SD 0.075 SD 0.356
Mean 0.154
Data not Normal at 5% Significance Level Data appear Lognormal at 5% Significance Level
5% Shapiro Wilk Critical Value 0.866
Observations < Largest ND are treated as NDs Single DL Non-Detect Percentage 88.00%
Number treated as Detected 6
Number treated as Non-Detect 44
Maximum Non-Detect 0.25 Maximum Non-Detect -1.386
Minimum Non-Detect 0.2 Minimum Non-Detect -1.609
SD of Detected 0.0926 SD of Detected 0.32
Mean of Detected 0.252 Mean of Detected -1.43
Page 16 of 39
EXPOSED SOILS (0-0.5 FEET BGS)
DL/2 Substitution Method
Data appear Normal at 5% Significance Level Data appear Lognormal at 5% Significance Level
SD 0.107 SD 0.259
95% DL/2 (t) UCL 0.304 95% H-Stat (DL/2) UCL 0.295
Mean 0.122 Mean in Log Scale -1.683
0.263
95% MLE (Tiku) UCL 0.443 SD in Original Scale 0.154
95% KM (Chebyshev) UCL 0.296
Minimum 0.00286
Number of Valid Observations 50 Number of Distinct Observations 48
General Statistics
Chemical (chromium)
For additional insight, the user may want to consult a statistician.
These recommendations are based upon the results of the simulation studies summarized in Singh, Maichle, and Lee (2006).
Note: Suggestions regarding the selection of a 95% UCL are provided to help the user to select the most appropriate 95% UCL.
Note: DL/2 is not a recommended method.
95% Gamma Approximate UCL 0.358
95% Adjusted Gamma UCL 0.36
95% KM (Percentile Bootstrap) UCL 0.556
Nu star 133.5 Potential UCLs to Use
AppChi2 107.8 95% KM (t) UCL 0.242
k star 1.335
Theta star 0.216
99% KM (Chebyshev) UCL 0.407
SD 0.202 97.5% KM (Chebyshev) UCL 0.333
Median 0.253
Mean 0.289 95% KM (Percentile Bootstrap) UCL 0.556
95% KM (bootstrap t) UCL 0.231
Maximum 0.738 95% KM (BCA) UCL 0.713
Assuming Gamma Distribution
Gamma ROS Statistics using Extrapolated Data 95% KM (jackknife) UCL 0.41
95% KM (z) UCL 0.242
Data appear Gamma Distributed at 5% Significance Level SE of Mean 0.0199
95% KM (t) UCL 0.242
5% K-S Critical Value 0.358 SD 0.126
K-S Test Statistic 0.681 Mean 0.209
A-D Test Statistic 0.538 Nonparametric Statistics
5% A-D Critical Value 0.681 Kaplan-Meier (KM) Method
nu star 19.9
Theta Star 0.268
k star (bias corrected) 1.99 Data appear Normal at 5% Significance Level
Gamma Distribution Test with Detected Values Only Data Distribution Test with Detected Values Only
95% BCA Bootstrap UCL 0.269
95% Percentile Bootstrap UCL 0.264
95% t UCL
95% MLE (t) UCL 0.186 Mean in Original Scale 0.226
SD 0.269 SD in Log Scale 0.634
Maximum Likelihood Estimate(MLE) Method Log ROS Method
Assuming Normal Distribution
Mean 0.278 Mean -1.322
Assuming Lognormal Distribution
DL/2 Substitution Method
5% Shapiro Wilk Critical Value 0.762 5% Shapiro Wilk Critical Value 0.762
Lognormal Distribution Test with Detected Values Only
Shapiro Wilk Test Statistic 0.888 Shapiro Wilk Test Statistic 0.788
Normal Distribution Test with Detected Values Only
UCL Statistics
It is recommended to have 10-15 or more distinct observations for accurate and meaningful results.
the resulting calculations may not be reliable enough to draw conclusions
Note: It should be noted that even though bootstrap may be performed on this data set
Warning: There are only 5 Detected Values in this data
Maximum Non-Detect -0.693Maximum Non-Detect 0.5
Minimum Non-Detect 0.5 Minimum Non-Detect -0.693
SD of Detected 0.226 SD of Detected 0.591
Maximum Detected 0.738
Mean of Detected 0.533 Mean of Detected -0.74
Maximum Detected -0.304
Page 17 of 39
EXPOSED SOILS (0-0.5 FEET BGS)
Mean 12.1 Mean of log Data 2.297
Median 9.775 SD of log Data 0.577
Shapiro Wilk Critical Value 0.947
Shapiro Wilk Test Statistic 0.658 Shapiro Wilk Test Statistic 0.932
95% Adjusted-CLT UCL (Chen-1995) 15.04 97.5% Chebyshev (MVUE) UCL 18.05
95% Bootstrap-t UCL 15.53
Adjusted Level of Significance 0.0452 95% CLT UCL 14.41
95% Adjusted Gamma UCL 14.15
Maximum Non-Detect 0.33 Maximum Non-Detect -1.109
Observations < Largest ND are treated as NDs Single DL Non-Detect Percentage 47.27%
Note: Data have multiple DLs - Use of KM Method is recommended Number treated as Non-Detect 26
For all methods (except KM, DL/2, and ROS Methods), Number treated as Detected 29
SD of Detected 2.639
Minimum Non-Detect 0.02 Minimum Non-Detect -3.912
SD of Detected 19.79
Mean of Detected 12.46 Mean of Detected 0.462
Maximum Detected 95 Maximum Detected 4.554
Raw Statistics
Minimum Detected 0.016 Minimum Detected -4.135
Log-transformed Statistics
Percent Non-Detects 16.36%
Number of Distinct Detected Data 42 Number of Non-Detect Data 9
Number of Valid Data 55 Number of Detected Data 46
General Statistics
Chemical (chrysene)
These recommendations are based upon the results of the simulation studies summarized in Singh, Singh, and Iaci (2002)
and Singh and Singh (2003). For additional insight, the user may want to consult a statistician.
Note: Suggestions regarding the selection of a 95% UCL are provided to help the user to select the most appropriate 95% UCL.
Potential UCL to Use Use 95% Chebyshev (Mean, Sd) UCL 18.24
95% Approximate Gamma UCL 14.08
99% Chebyshev(Mean, Sd) UCL 26.11Assuming Gamma Distribution
Data not Gamma Distributed at 5% Significance Level 95% Chebyshev(Mean, Sd) UCL 18.24
97.5% Chebyshev(Mean, Sd) UCL 20.89
Kolmogorov-Smirnov 5% Critical Value 0.126 95% BCA Bootstrap UCL 15.24
Kolmogorov-Smirnov Test Statistic 0.193 95% Percentile Bootstrap UCL 14.41
Anderson-Darling 5% Critical Value 0.759 95% Hall's Bootstrap UCL 15.74
Anderson-Darling Test Statistic 2.469
95% Standard Bootstrap UCL 14.39
Adjusted Chi Square Value 218.4 95% Jackknife UCL 14.46
nu star 255.4
Approximate Chi Square Value (.05) 219.4 Nonparametric Statistics
MLE of Standard Deviation 7.569
MLE of Mean 12.1
Theta Star 4.736
k star (bias corrected) 2.554 Data do not follow a Discernable Distribution (0.05)
Gamma Distribution Test Data Distribution
95% Modified-t UCL (Johnson-1978) 14.56 99% Chebyshev (MVUE) UCL 21.82
95% UCLs (Adjusted for Skewness) 95% Chebyshev (MVUE) UCL 16.13
95% Student's-t UCL 14.46 95% H-UCL 13.79
Assuming Normal Distribution Assuming Lognormal Distribution
Data not Normal at 5% Significance Level Data not Lognormal at 5% Significance Level
Shapiro Wilk Critical Value 0.947
Relevant UCL Statistics
Normal Distribution Test Lognormal Distribution Test
Skewness 2.942
Coefficient of Variation 0.823
SD 9.959
Minimum of Log Data 1.008
Maximum 58.5 Maximum of Log Data 4.069
Minimum 2.74
Raw Statistics Log-transformed Statistics
Page 18 of 39
EXPOSED SOILS (0-0.5 FEET BGS)
0.945 5% Shapiro Wilk Critical Value 0.945
Normal Distribution Test with Detected Values Only Lognormal Distribution Test with Detected Values Only
3.053
Maximum Likelihood Estimate(MLE) Method N/A Log ROS Method
95% BCA Bootstrap UCL 15.12
95% Percentile Bootstrap UCL 14.92
Data do not follow a Discernable Distribution (0.05)
14.64
SD 18.48
Mean 10.42
Skewness 0.034
Coefficient of Variation 0.339
SD 1.866
Median 5.67 SD of log Data 0.402
Mean 5.5 Mean of log Data 1.636
Maximum 10.7 Maximum of Log Data 2.37
Raw Statistics Log-transformed Statistics
Minimum 1.53 Minimum of Log Data 0.425
Number of Valid Observations 50 Number of Distinct Observations 48
Chemical (cobalt)
General Statistics
Note: Suggestions regarding the selection of a 95% UCL are provided to help the user to select the most appropriate 95% UCL.
These recommendations are based upon the results of the simulation studies summarized in Singh, Maichle, and Lee (2006).
For additional insight, the user may want to consult a statistician.
Note: DL/2 is not a recommended method.
95% Adjusted Gamma UCL 22.64
95% Gamma Approximate UCL 22.17
AppChi2 6.595 99% KM (Chebyshev) UCL 35.49
Nu star 14.03 Potential UCLs to Use
99% KM (Chebyshev) UCL 35.49
Theta star 81.65
k star 0.128
SD 18.66 97.5% KM (Chebyshev) UCL 26.16
Median 0.69 95% KM (Chebyshev) UCL 21.41
Mean 10.42 95% KM (Percentile Bootstrap) UCL 14.59
Maximum 95 95% KM (BCA) UCL 14.93
Minimum 1E-12 95% KM (bootstrap t) UCL 16.27
Gamma ROS Statistics using Extrapolated Data 95% KM (jackknife) UCL 14.63
95% KM (z) UCL 14.57Assuming Gamma Distribution
Data not Gamma Distributed at 5% Significance Level SE of Mean 2.52
95% KM (t) UCL
K-S Test Statistic 0.855
5% K-S Critical Value 0.141
A-D Test Statistic 1.044 Nonparametric Statistics
5% A-D Critical Value 0.855 Kaplan-Meier (KM) Method
nu star 29.68
Theta Star 38.61
Gamma Distribution Test with Detected Values Only
k star (bias corrected) 0.323
Data Distribution Test with Detected Values Only
95% t UCL 14.63
SD in Original Scale 18.65
Mean in Original Scale 10.42
MLE yields a negative mean Mean in Log Scale -0.328
SD in Log Scale
95% DL/2 (t) UCL 14.63 95% H-Stat (DL/2) UCL 409.7
SD 18.65 SD 2.9
Mean 10.43 Mean -0.216
DL/2 Substitution Method DL/2 Substitution Method
Assuming Normal Distribution Assuming Lognormal Distribution
Data not Normal at 5% Significance Level Data not Lognormal at 5% Significance Level
5% Shapiro Wilk Critical Value
Shapiro Wilk Test Statistic 0.689 Shapiro Wilk Test Statistic 0.914
UCL Statistics
Page 19 of 39
EXPOSED SOILS (0-0.5 FEET BGS)
5.193
Raw Statistics Log-transformed Statistics
Minimum 5.44 Minimum of Log Data 1.694
Shapiro Wilk Critical Value 0.947
99% Chebyshev (MVUE) UCL 59.18
95% UCLs (Adjusted for Skewness) 95% Chebyshev (MVUE) UCL 41.1
95% Adjusted-CLT UCL (Chen-1995) 38.36 97.5% Chebyshev (MVUE) UCL 47.2
MLE of Standard Deviation 23.46
MLE of Mean 28.79
Data do not follow a Discernable Distribution (0.05)
Theta Star 19.11
k star (bias corrected) 1.506
Gamma Distribution Test Data Distribution
95% Modified-t UCL (Johnson-1978) 36.76
Assuming Normal Distribution Assuming Lognormal Distribution
95% Student's-t UCL 36.43 95% H-UCL 34.2
Shapiro Wilk Critical Value 0.947
Data not Normal at 5% Significance Level Data not Lognormal at 5% Significance Level
Normal Distribution Test
Shapiro Wilk Test Statistic 0.937Shapiro Wilk Test Statistic 0.63
Lognormal Distribution Test
Relevant UCL Statistics
Skewness 3.003
Coefficient of Variation 1.119
SD 32.23
Median 19.9 SD of log Data 0.762
Mean 28.79 Mean of log Data 3.013
Maximum 180 Maximum of Log Data
Number of Valid Observations 50 Number of Distinct Observations 47
Chemical (copper)
General Statistics
Note: Suggestions regarding the selection of a 95% UCL are provided to help the user to select the most appropriate 95% UCL.
These recommendations are based upon the results of the simulation studies summarized in Singh, Singh, and Iaci (2002)
and Singh and Singh (2003). For additional insight, the user may want to consult a statistician.
Potential UCL to Use Use 95% Student's-t UCL 5.942
95% Adjusted Gamma UCL 6.036
Assuming Gamma Distribution 99% Chebyshev(Mean, Sd) UCL 8.126
95% Approximate Gamma UCL 6.02
Data not Gamma Distributed at 5% Significance Level 95% Chebyshev(Mean, Sd) UCL 6.65
97.5% Chebyshev(Mean, Sd) UCL 7.148
Kolmogorov-Smirnov 5% Critical Value 0.125 95% BCA Bootstrap UCL 5.933
Kolmogorov-Smirnov Test Statistic 0.129 95% Percentile Bootstrap UCL 5.936
Anderson-Darling 5% Critical Value 0.752 95% Hall's Bootstrap UCL 5.936
Anderson-Darling Test Statistic 0.97 95% Bootstrap-t UCL 5.929
95% Standard Bootstrap UCL 5.934
Adjusted Chi Square Value 635.8 95% Jackknife UCL 5.942
Adjusted Level of Significance 0.0452 95% CLT UCL 5.934
nu star 697.7
Approximate Chi Square Value (.05) 637.5 Nonparametric Statistics
MLE of Mean 5.5
MLE of Standard Deviation 2.082
k star (bias corrected) 6.977 Data appear Normal at 5% Significance Level
Theta Star 0.788
Gamma Distribution Test Data Distribution
95% Modified-t UCL (Johnson-1978) 5.943 99% Chebyshev (MVUE) UCL 8.805
95% UCLs (Adjusted for Skewness) 95% Chebyshev (MVUE) UCL 6.98
95% Adjusted-CLT UCL (Chen-1995) 5.935 97.5% Chebyshev (MVUE) UCL 7.595
Assuming Normal Distribution Assuming Lognormal Distribution
95% Student's-t UCL 5.942 95% H-UCL 6.182
Data appear Normal at 5% Significance Level Data not Lognormal at 5% Significance Level
Shapiro Wilk Critical Value 0.947 Shapiro Wilk Critical Value 0.947
Shapiro Wilk Test Statistic 0.98 Shapiro Wilk Test Statistic 0.915
Relevant UCL Statistics
Normal Distribution Test Lognormal Distribution Test
Page 20 of 39
EXPOSED SOILS (0-0.5 FEET BGS)
0.915
Observations < Largest ND are treated as NDs
Note: Data have multiple DLs - Use of KM Method is recommended
For all methods (except KM, DL/2, and ROS Methods),
5% Shapiro Wilk Critical Value 0.911 5% Shapiro Wilk Critical Value 0.911
N/A Log ROS Method
Mean 1.582 Mean -1.689
nu star 23.81
Theta Star 6.509
Gamma Distribution Test with Detected Values Only
k star (bias corrected) 0.541 Data appear Gamma Distributed at 5% Significance Level
Data Distribution Test with Detected Values Only
95% BCA Bootstrap UCL 2.226
95% Percentile Bootstrap UCL 2.14
95% t UCL 2.099
SD in Original Scale 2.994
Mean in Original Scale 1.424
MLE yields a negative mean
SD in Log Scale 2.746
Mean in Log Scale -2.507
Maximum Likelihood Estimate(MLE) Method
95% DL/2 (t) UCL 2.249 95% H-Stat (DL/2) UCL 15.91
SD 2.954 SD 2.443
DL/2 Substitution Method DL/2 Substitution Method
Assuming Normal Distribution Assuming Lognormal Distribution
Data not Normal at 5% Significance Level Data appear Lognormal at 5% Significance Level
UCL Statistics
Normal Distribution Test with Detected Values Only Lognormal Distribution Test with Detected Values Only
Shapiro Wilk Test Statistic 0.831 Shapiro Wilk Test Statistic
Single DL Non-Detect Percentage 87.27%
Number treated as Detected 7
Number treated as Non-Detect 48
Maximum Non-Detect 5 Maximum Non-Detect 1.609
Minimum Non-Detect 0.01 Minimum Non-Detect -4.605
SD of Detected 3.919 SD of Detected 1.91
Mean of Detected 3.522 Mean of Detected 0.212
Maximum Detected 13 Maximum Detected 2.565
Minimum Detected 0.02 Minimum Detected -3.912
Raw Statistics Log-transformed Statistics
Percent Non-Detects 60.00%
Number of Detected Data 22
Number of Distinct Detected Data 21 Number of Non-Detect Data 33
Number of Valid Data 55
General Statistics
Chemical (dibenz(a,h)anthracene)
and Singh and Singh (2003). For additional insight, the user may want to consult a statistician.
Note: Suggestions regarding the selection of a 95% UCL are provided to help the user to select the most appropriate 95% UCL.
These recommendations are based upon the results of the simulation studies summarized in Singh, Singh, and Iaci (2002)
Potential UCL to Use Use 95% Chebyshev (Mean, Sd) UCL 48.66
95% Adjusted Gamma UCL 35.4
95% Approximate Gamma UCL 35.18
99% Chebyshev(Mean, Sd) UCL 74.14Assuming Gamma Distribution
97.5% Chebyshev(Mean, Sd) UCL 57.25
95% Chebyshev(Mean, Sd) UCL 48.66Data not Gamma Distributed at 5% Significance Level
Kolmogorov-Smirnov 5% Critical Value 0.127 95% BCA Bootstrap UCL 38.42
Kolmogorov-Smirnov Test Statistic 0.206 95% Percentile Bootstrap UCL 36.58
Anderson-Darling 5% Critical Value 0.766 95% Hall's Bootstrap UCL 40.29
Anderson-Darling Test Statistic 2.517 95% Bootstrap-t UCL 40.27
95% Standard Bootstrap UCL 36.17
Adjusted Chi Square Value 122.5 95% Jackknife UCL 36.43
Nonparametric Statistics
Adjusted Level of Significance 0.0452 95% CLT UCL 36.29
Approximate Chi Square Value (.05) 123.3
nu star 150.6
Page 21 of 39
EXPOSED SOILS (0-0.5 FEET BGS)
2.134
5% K-S Critical Value 0.195 SD 2.963
0.905
Observations < Largest ND are treated as NDs
Note: Data have multiple DLs - Use of KM Method is recommended
For all methods (except KM, DL/2, and ROS Methods),
5% Shapiro Wilk Critical Value 0.947 5% Shapiro Wilk Critical Value 0.947
DL/2 Substitution Method DL/2 Substitution Method
95% DL/2 (t) UCL 46.39 95% H-Stat (DL/2) UCL 3222
95% BCA Bootstrap UCL 49.91
95% Percentile Bootstrap UCL 46.96
95% t UCL 46.38
95% MLE (Tiku) UCL 28.07 SD in Original Scale 63.59
95% MLE (t) UCL 25.96 Mean in Original Scale 32.03
SD 88.04 SD in Log Scale 3.387
Mean 6.092 Mean in Log Scale 0.419
Maximum Likelihood Estimate(MLE) Method Log ROS Method
SD 63.59 SD 3.199
Mean 32.04 Mean 0.537
Assuming Normal Distribution Assuming Lognormal Distribution
Data not Normal at 5% Significance Level Data not Lognormal at 5% Significance Level
UCL Statistics
Normal Distribution Test with Detected Values Only Lognormal Distribution Test with Detected Values Only
Shapiro Wilk Test Statistic 0.606 Shapiro Wilk Test Statistic
Single DL Non-Detect Percentage 38.18%
Number treated as Detected 34
Number treated as Non-Detect 21
Maximum Non-Detect 0.33 Maximum Non-Detect -1.109
Minimum Non-Detect 0.02 Minimum Non-Detect -3.912
SD of Detected 66.86 SD of Detected 2.947
Mean of Detected 36.7 Mean of Detected 1.133
Maximum Detected 300 Maximum Detected 5.704
Minimum Detected 0.029 Minimum Detected -3.54
Raw Statistics Log-transformed Statistics
Percent Non-Detects 12.73%
Number of Detected Data 48
Number of Distinct Detected Data 43 Number of Non-Detect Data 7
Number of Valid Data 55
General Statistics
Chemical (fluoranthene)
For additional insight, the user may want to consult a statistician.
Note: Suggestions regarding the selection of a 95% UCL are provided to help the user to select the most appropriate 95% UCL.
These recommendations are based upon the results of the simulation studies summarized in Singh, Maichle, and Lee (2006).
Note: DL/2 is not a recommended method.
95% Adjusted Gamma UCL 4.372
95% Gamma Approximate UCL 4.347
AppChi2 106.7 95% KM (t) UCL 2.134
Nu star 132.2 Potential UCLs to Use
Theta star 2.917
k star 1.202 99% KM (Chebyshev) UCL 5.527
SD 2.583 97.5% KM (Chebyshev) UCL 4.008
Median 3.173 95% KM (Chebyshev) UCL 3.235
Mean 3.506 95% KM (Percentile Bootstrap) UCL 2.148
Maximum 13 95% KM (BCA) UCL 2.246
Minimum 0.02 95% KM (bootstrap t) UCL 2.393
Gamma ROS Statistics using Extrapolated Data 95% KM (jackknife) UCL 2.121
95% KM (z) UCL 2.122Assuming Gamma Distribution
95% KM (t) UCL
Data appear Gamma Distributed at 5% Significance Level SE of Mean 0.41
K-S Test Statistic 0.796 Mean 1.448
Nonparametric Statistics
5% A-D Critical Value 0.796 Kaplan-Meier (KM) Method
A-D Test Statistic 0.3
Page 22 of 39
EXPOSED SOILS (0-0.5 FEET BGS)
Data do not follow a Discernable Distribution (0.05)
Number of Non-Detect Data 42
Number of Valid Data 55 Number of Detected Data 13
Minimum Detected 0.04 Minimum Detected -3.219
-4.605
SD of Detected 2.985 SD of Detected 1.889
Shapiro Wilk Test Statistic 0.741 Shapiro Wilk Test Statistic 0.927
95% Percentile Bootstrap UCL 0.905
95% t UCL 0.898
SD in Original Scale 1.679
Mean in Original Scale 0.519
MLE method failed to converge properly Mean in Log Scale -4.226
SD in Log Scale 2.747
Maximum Likelihood Estimate(MLE) Method N/A Log ROS Method
95% H-Stat (DL/2) UCL 4.511 95% DL/2 (t) UCL 1.219
SD 1.699 SD 2.161
Mean 0.835 Mean -1.988
Assuming Normal Distribution Assuming Lognormal Distribution
DL/2 Substitution Method DL/2 Substitution Method
Data not Normal at 5% Significance Level Data appear Lognormal at 5% Significance Level
5% Shapiro Wilk Critical Value 0.866 5% Shapiro Wilk Critical Value 0.866
Normal Distribution Test with Detected Values Only Lognormal Distribution Test with Detected Values Only
UCL Statistics
Single DL Non-Detect Percentage 96.36%Observations < Largest ND are treated as NDs
Number treated as Detected 2For all methods (except KM, DL/2, and ROS Methods),
Number treated as Non-Detect 53Note: Data have multiple DLs - Use of KM Method is recommended
Maximum Non-Detect 5 Maximum Non-Detect 1.609
Minimum Non-Detect 0.01 Minimum Non-Detect
Mean of Detected 2.149 Mean of Detected -0.431
Maximum Detected 10 Maximum Detected 2.303
Raw Statistics Log-transformed Statistics
General Statistics
Percent Non-Detects 76.36%
Number of Distinct Detected Data 13
Chemical (fluorene)
For additional insight, the user may want to consult a statistician.
These recommendations are based upon the results of the simulation studies summarized in Singh, Maichle, and Lee (2006).
Note: Suggestions regarding the selection of a 95% UCL are provided to help the user to select the most appropriate 95% UCL.
Note: DL/2 is not a recommended method.
95% Adjusted Gamma UCL 67.65
95% Gamma Approximate UCL 66.3
AppChi2 7.213 99% KM (Chebyshev) UCL 117.5
Nu star 14.93 Potential UCLs to Use
Theta star 236
k star 0.136 99% KM (Chebyshev) UCL 117.5
Median 1.4
SD 63.59 97.5% KM (Chebyshev) UCL 85.65
95% KM (Chebyshev) UCL 69.46
Maximum 300
Mean 32.03 95% KM (Percentile Bootstrap) UCL 46.88
95% KM (BCA) UCL 45.7
Gamma ROS Statistics using Extrapolated Data
Minimum 1E-12 95% KM (bootstrap t) UCL 53.25
95% KM (jackknife) UCL 46.38
Assuming Gamma Distribution 95% KM (z) UCL 46.16
95% KM (t) UCL 46.4
SE of Mean 8.586Data not Gamma Distributed at 5% Significance Level
Mean 32.03
5% K-S Critical Value 0.139 SD 63.01
K-S Test Statistic 0.87
Nonparametric Statistics
5% A-D Critical Value 0.87 Kaplan-Meier (KM) Method
A-D Test Statistic 1.193
nu star 26.71
Theta Star 131.9
k star (bias corrected) 0.278
Gamma Distribution Test with Detected Values Only Data Distribution Test with Detected Values Only
Page 23 of 39
EXPOSED SOILS (0-0.5 FEET BGS)
Mean 3.649 95% KM (Percentile Bootstrap) UCL 1.02
97.5% KM (Chebyshev) UCL 2.049
Median 2.236 95% KM (Chebyshev) UCL 1.604
Theta star 16.29
Potential UCLs to Use
AppChi2 14.33 95% KM (t) UCL 0.97
Minimum Detected 0.029 Minimum Detected -3.54
Mean of Detected 0.84
Maximum Detected 100 Maximum Detected 4.605
Minimum Non-Detect 0.02 Minimum Non-Detect -3.912
Maximum Non-Detect 0.33 Maximum Non-Detect -1.109
SD in Original Scale 24.73
SD 24.73
95% MLE (Tiku) UCL 12.81
95% MLE (t) UCL 11.83 Mean in Original Scale 14.54
SD 35.4 SD in Log Scale 3.133
Mean 3.841 Mean in Log Scale -0.00901
Maximum Likelihood Estimate(MLE) Method Log ROS Method
SD 2.972
95% DL/2 (t) UCL 20.12 95% H-Stat (DL/2) UCL 761.2
Mean 14.54 Mean 0.1
DL/2 Substitution Method DL/2 Substitution Method
Assuming Normal Distribution Assuming Lognormal Distribution
Data not Normal at 5% Significance Level Data not Lognormal at 5% Significance Level
5% Shapiro Wilk Critical Value 0.945 5% Shapiro Wilk Critical Value 0.945
Shapiro Wilk Test Statistic 0.708 Shapiro Wilk Test Statistic 0.907
Normal Distribution Test with Detected Values Only Lognormal Distribution Test with Detected Values Only
UCL Statistics
For all methods (except KM, DL/2, and ROS Methods),
Single DL Non-Detect Percentage 40.00%Observations < Largest ND are treated as NDs
Number treated as Detected 33
Note: Data have multiple DLs - Use of KM Method is recommended Number treated as Non-Detect 22
SD of Detected 26.14 SD of Detected 2.632
Mean of Detected 17.38
Raw Statistics Log-transformed Statistics
Number of Non-Detect Data 9
Percent Non-Detects 16.36%
Number of Distinct Detected Data 42
Number of Valid Data 55 Number of Detected Data 46
General Statistics
Chemical (indeno(1,2,3-cd)pyrene)
Note: Suggestions regarding the selection of a 95% UCL are provided to help the user to select the most appropriate 95% UCL.
For additional insight, the user may want to consult a statistician.
These recommendations are based upon the results of the simulation studies summarized in Singh, Maichle, and Lee (2006).
Note: DL/2 is not a recommended method.
95% Adjusted Gamma UCL 6.366
95% Gamma Approximate UCL 6.272
Nu star 24.63
k star 0.224 99% KM (Chebyshev) UCL 2.924
SD 3.87
95% KM (bootstrap t) UCL 1.388
Maximum 16.09 95% KM (BCA) UCL 1.054
Minimum 1E-12
Gamma ROS Statistics using Extrapolated Data 95% KM (jackknife) UCL 0.953
95% KM (z) UCL 0.963Assuming Gamma Distribution
Data appear Gamma Distributed at 5% Significance Level SE of Mean 0.236
95% KM (t) UCL 0.97
Mean 0.574
5% K-S Critical Value 0.249 SD 1.664
K-S Test Statistic 0.788
5% A-D Critical Value 0.788 Kaplan-Meier (KM) Method
A-D Test Statistic 0.323 Nonparametric Statistics
nu star 11.87
Theta Star 4.707
k star (bias corrected) 0.457 Data appear Gamma Distributed at 5% Significance Level
Gamma Distribution Test with Detected Values Only Data Distribution Test with Detected Values Only
95% BCA Bootstrap UCL 1.081
Page 24 of 39
EXPOSED SOILS (0-0.5 FEET BGS)
Nu star 14 Potential UCLs to Use
AppChi2 6.574 99% KM (Chebyshev) UCL 47.78
Median 129 SD of log Data 1.809
Adjusted Chi Square Value 21.75 95% Jackknife UCL 1578
Adjusted Level of Significance 0.0453 95% CLT UCL 1563
Approximate Chi Square Value (.05) 22.04 Nonparametric Statistics
nu star 34.47
MLE of Standard Deviation 1318
MLE of Mean 766
k star (bias corrected) 0.338 Data appear Lognormal at 5% Significance Level
Theta Star 2267
Data DistributionGamma Distribution Test
95% Adjusted-CLT UCL (Chen-1995) 2068
95% Modified-t UCL (Johnson-1978) 1657 99% Chebyshev (MVUE) UCL 2360
97.5% Chebyshev (MVUE) UCL 1673
95% UCLs (Adjusted for Skewness) 95% Chebyshev (MVUE) UCL 1324
95% Student's-t UCL 1578 95% H-UCL 1291
Assuming Normal Distribution Assuming Lognormal Distribution
Data not Normal at 5% Significance Level Data appear Lognormal at 5% Significance Level
Lilliefors Critical Value 0.124 Lilliefors Critical Value 0.124
Lilliefors Test Statistic 0.413 Lilliefors Test Statistic 0.0535
Normal Distribution Test Lognormal Distribution Test
Relevant UCL Statistics
Skewness 6.966
Coefficient of Variation 4.518
SD 3461
Mean 766 Mean of log Data 4.689
Maximum 24800 Maximum of Log Data 10.12
Minimum 2.76 Minimum of Log Data 1.015
Raw Statistics Log-transformed Statistics
Number of Valid Observations 51 Number of Distinct Observations 51
Chemical (lead)
General Statistics
For additional insight, the user may want to consult a statistician.
Note: DL/2 is not a recommended method.
Note: Suggestions regarding the selection of a 95% UCL are provided to help the user to select the most appropriate 95% UCL.
These recommendations are based upon the results of the simulation studies summarized in Singh, Maichle, and Lee (2006).
95% Adjusted Gamma UCL 31.62
95% Gamma Approximate UCL 30.96
Theta star 114.2
k star 0.127 99% KM (Chebyshev) UCL 47.78
Median 1.2
SD 24.73 97.5% KM (Chebyshev) UCL 35.4
95% KM (Chebyshev) UCL 29.1
Mean 14.54 95% KM (Percentile Bootstrap) UCL 20.19
Maximum 100 95% KM (BCA) UCL 20.36
Minimum 1E-12 95% KM (bootstrap t) UCL 22.02
Gamma ROS Statistics using Extrapolated Data 95% KM (jackknife) UCL 20.12
95% KM (z) UCL 20.04Assuming Gamma Distribution
95% KM (t) UCL 20.13
SE of Mean 3.34Data not Gamma Distributed at 5% Significance Level
Mean 14.54
5% K-S Critical Value 0.141 SD 24.5
K-S Test Statistic 0.853
5% A-D Critical Value 0.853 Kaplan-Meier (KM) Method
A-D Test Statistic 1.001 Nonparametric Statistics
nu star 30.22
k star (bias corrected) 0.328 Data do not follow a Discernable Distribution (0.05)
Theta Star 52.91
Gamma Distribution Test with Detected Values Only Data Distribution Test with Detected Values Only
95% BCA Bootstrap UCL 21.28
95% Percentile Bootstrap UCL 20.59
95% t UCL 20.12
Page 25 of 39
EXPOSED SOILS (0-0.5 FEET BGS)
95% Adjusted Gamma UCL 1214
Mean of Detected -2.163
Maximum Detected 2.77 Maximum Detected 1.019
Shapiro Wilk Test Statistic 0.938
Observations < Largest ND are treated as NDs
Gamma Distribution Test with Detected Values Only Data Distribution Test with Detected Values Only
Nonparametric Statistics
5% A-D Critical Value 0.784 Kaplan-Meier (KM) Method
A-D Test Statistic 1.331
nu star 18.01
Theta Star 0.53
k star (bias corrected) 0.563 Data appear Lognormal at 5% Significance Level
95% BCA Bootstrap UCL 0.291
95% t UCL 0.211
95% Percentile Bootstrap UCL 0.226
SD in Original Scale 0.39
Mean in Original Scale 0.119
SD in Log Scale 1.266
Mean in Log Scale -3.221MLE yields a negative mean
Maximum Likelihood Estimate(MLE) Method N/A Log ROS Method
95% DL/2 (t) UCL 0.217 95% H-Stat (DL/2) UCL 0.111
Mean 0.125
SD 0.388 SD 0.853
Mean -2.83
Assuming Lognormal Distribution
DL/2 Substitution Method
Assuming Normal Distribution
DL/2 Substitution Method
Data appear Lognormal at 5% Significance LevelData not Normal at 5% Significance Level
5% Shapiro Wilk Critical Value 0.887 5% Shapiro Wilk Critical Value 0.887
Shapiro Wilk Test Statistic 0.399
Normal Distribution Test with Detected Values Only Lognormal Distribution Test with Detected Values Only
UCL Statistics
For all methods (except KM, DL/2, and ROS Methods),
Single DL Non-Detect Percentage 78.00%
Number treated as Detected 11
Note: Data have multiple DLs - Use of KM Method is recommended Number treated as Non-Detect 39
Maximum Non-Detect 0.1 Maximum Non-Detect -2.303
Minimum Non-Detect 0.0835 Minimum Non-Detect -2.483
SD of Detected 0.666 SD of Detected 1.291
Mean of Detected 0.298
Minimum Detected 0.00925 Minimum Detected -4.683
Raw Statistics Log-transformed Statistics
Percent Non-Detects 68.00%
Number of Distinct Detected Data 16 Number of Non-Detect Data 34
Number of Valid Data 50 Number of Detected Data 16
Chemical (mercury)
General Statistics
Note: Suggestions regarding the selection of a 95% UCL are provided to help the user to select the most appropriate 95% UCL.
These recommendations are based upon the results of the simulation studies summarized in Singh, Singh, and Iaci (2002)
and Singh and Singh (2003). For additional insight, the user may want to consult a statistician.
H-statistic often results in unstable (both high and low) values of UCL95 as shown in examples in the Technical Guide.
It is therefore recommended to avoid the use of H-statistic based 95% UCLs.
Use of nonparametric methods are preferred to compute UCL95 for skewed data sets which do not follow a gamma distribution.
ProUCL computes and outputs H-statistic based UCLs for historical reasons only.
Potential UCL to Use Use 95% H-UCL 1291
Assuming Gamma Distribution 99% Chebyshev(Mean, Sd) UCL 5588
95% Approximate Gamma UCL 1198
97.5% Chebyshev(Mean, Sd) UCL 3793
95% Chebyshev(Mean, Sd) UCL 2879Data not Gamma Distributed at 5% Significance Level
95% Percentile Bootstrap UCL 1697
Kolmogorov-Smirnov 5% Critical Value 0.134 95% BCA Bootstrap UCL 2621
Kolmogorov-Smirnov Test Statistic 0.217
95% Bootstrap-t UCL 6828
Anderson-Darling 5% Critical Value 0.852 95% Hall's Bootstrap UCL 4401
Anderson-Darling Test Statistic 3.791
95% Standard Bootstrap UCL 1548
Page 26 of 39
EXPOSED SOILS (0-0.5 FEET BGS)
5% K-S Critical Value 0.225 SD 0.386
95% KM (t) UCL 0.211
0.225
Minimum 0.00925 95% KM (bootstrap t) UCL 0.558
0.352
Potential UCLs to Use
Number of Detected Data 19
For additional insight, the user may want to consult a statistician.
Chemical (molybdenum)
DL/2 Substitution Method DL/2 Substitution Method
SD 1.467
Mean 1.539 Mean -1.134
2.059
Maximum Likelihood Estimate(MLE) Method N/A Log ROS Method
2.481
SD in Original Scale 4.032
nu star 20.32
Theta Star 7.154
k star (bias corrected) 0.535 Data appear Lognormal at 5% Significance Level
Gamma Distribution Test with Detected Values Only Data Distribution Test with Detected Values Only
95% BCA Bootstrap UCL 2.976
95% Percentile Bootstrap UCL 2.531
95% t UCL
Mean in Original Scale 1.525
MLE yields a negative mean Mean in Log Scale -1.623
SD in Log Scale
95% DL/2 (t) UCL 2.493 95% H-Stat (DL/2) UCL 1.731
SD 4.026
Assuming Normal Distribution Assuming Lognormal Distribution
Data not Normal at 5% Significance Level Data appear Lognormal at 5% Significance Level
5% Shapiro Wilk Critical Value 0.901 5% Shapiro Wilk Critical Value 0.901
Normal Distribution Test with Detected Values Only
Shapiro Wilk Test Statistic 0.661 Shapiro Wilk Test Statistic 0.959
Lognormal Distribution Test with Detected Values Only
UCL Statistics
Single DL Non-Detect Percentage 72.00%Observations < Largest ND are treated as NDs
Number treated as Detected 14For all methods (except KM, DL/2, and ROS Methods),
Number treated as Non-Detect 36Note: Data have multiple DLs - Use of KM Method is recommended
Maximum Non-Detect 0.5 Maximum Non-Detect -0.693
Minimum Non-Detect 0.25 Minimum Non-Detect -1.386
SD of Detected 5.934 SD of Detected 1.513
Maximum Detected 22.2
Mean of Detected 3.826 Mean of Detected 0.299
Maximum Detected 3.1
Log-transformed Statistics
Minimum Detected 0.103
Raw Statistics
Minimum Detected -2.273
Percent Non-Detects 62.00%
Number of Distinct Detected Data 18 Number of Non-Detect Data 31
Number of Valid Data 50
General Statistics
These recommendations are based upon the results of the simulation studies summarized in Singh, Maichle, and Lee (2006).
Note: Suggestions regarding the selection of a 95% UCL are provided to help the user to select the most appropriate 95% UCL.
Note: DL/2 is not a recommended method.
95% Adjusted Gamma UCL 0.354
95% Gamma Approximate UCL
AppChi2 139.7 95% KM (BCA) UCL 0.225
Nu star 168.7
Theta star 0.172
k star 1.687 99% KM (Chebyshev) UCL 0.679
SD 0.369 97.5% KM (Chebyshev) UCL 0.469
Median 0.28 95% KM (Chebyshev) UCL 0.363
Mean 0.291 95% KM (Percentile Bootstrap) UCL 0.228
Maximum 2.77 95% KM (BCA) UCL
Gamma ROS Statistics using Extrapolated Data 95% KM (jackknife) UCL 0.209
Assuming Gamma Distribution 95% KM (z) UCL 0.209
Data not Gamma Distributed at 5% Significance Level SE of Mean 0.0565
K-S Test Statistic 0.784 Mean 0.116
Page 27 of 39
EXPOSED SOILS (0-0.5 FEET BGS)
95% KM (Chebyshev) UCL 4.06
Minimum 1E-12
Minimum Detected 0.029 Minimum Detected -3.54
Mean of Detected 0.476
Maximum Detected 180 Maximum Detected 5.193
Maximum Non-Detect 1.386
Minimum Non-Detect 0.015 Minimum Non-Detect -4.2
76.36%
Note: Data have multiple DLs - Use of KM Method is recommended Number treated as Non-Detect 42
For all methods (except KM, DL/2, and ROS Methods),
Mean -0.584
Assuming Normal Distribution Assuming Lognormal Distribution
DL/2 Substitution Method DL/2 Substitution Method
Theta Star 24.16
nu star 27.51
Data Distribution Test with Detected Values Only
k star (bias corrected) 0.372 Data appear Lognormal at 5% Significance Level
Gamma Distribution Test with Detected Values Only
95% BCA Bootstrap UCL 15.95
95% Percentile Bootstrap UCL 12.49
SD in Original Scale 24.42
95% t UCL 11.58
Mean in Original Scale 6.066
SD in Log Scale 2.493
MLE yields a negative mean Mean in Log Scale -0.755
Maximum Likelihood Estimate(MLE) Method N/A Log ROS Method
95% DL/2 (t) UCL 11.66 95% H-Stat (DL/2) UCL 61.56
SD 24.4 SD 2.51
Mean 6.157
Data not Normal at 5% Significance Level Data appear Lognormal at 5% Significance Level
5% Shapiro Wilk Critical Value 0.936 5% Shapiro Wilk Critical Value 0.936
Shapiro Wilk Test Statistic 0.296 Shapiro Wilk Test Statistic 0.964
Normal Distribution Test with Detected Values Only Lognormal Distribution Test with Detected Values Only
UCL Statistics
Observations < Largest ND are treated as NDs Single DL Non-Detect Percentage
Number treated as Detected 13
Maximum Non-Detect 4
SD of Detected 29.45 SD of Detected 1.975
Mean of Detected 8.983
Raw Statistics Log-transformed Statistics
Percent Non-Detects 32.73%
Number of Distinct Detected Data 33 Number of Non-Detect Data 18
Number of Valid Data 55 Number of Detected Data 37
General Statistics
Chemical (naphthalene)
For additional insight, the user may want to consult a statistician.
These recommendations are based upon the results of the simulation studies summarized in Singh, Maichle, and Lee (2006).
Note: Suggestions regarding the selection of a 95% UCL are provided to help the user to select the most appropriate 95% UCL.
Note: DL/2 is not a recommended method.
95% Gamma Approximate UCL 11.84
95% Adjusted Gamma UCL 12.02
Nu star 27.63 Potential UCLs to Use
AppChi2 16.64 95% KM (Chebyshev) UCL 4.06
k star 0.276
Theta star 25.8
99% KM (Chebyshev) UCL 7.299
SD 7.708 97.5% KM (Chebyshev) UCL 5.153
Median 3.652
Mean 7.127 95% KM (Percentile Bootstrap) UCL 2.526
95% KM (bootstrap t) UCL 3.417
Maximum 25.59 95% KM (BCA) UCL 2.637
Assuming Gamma Distribution
Gamma ROS Statistics using Extrapolated Data 95% KM (jackknife) UCL 2.49
95% KM (z) UCL 2.487
Data not Gamma Distributed at 5% Significance Level SE of Mean 0.579
95% KM (t) UCL 2.506
5% K-S Critical Value 0.209 SD 3.987
K-S Test Statistic 0.794 Mean 1.534
A-D Test Statistic 0.973 Nonparametric Statistics
5% A-D Critical Value 0.794 Kaplan-Meier (KM) Method
Page 28 of 39
EXPOSED SOILS (0-0.5 FEET BGS)
Nu star 10.85 Potential UCLs to Use
AppChi2 4.479 97.5% KM (Chebyshev) UCL 26.74
Mean of log Data 2.933
Raw Statistics Log-transformed Statistics
0.947
Relevant UCL Statistics
SD 617.4
156.3
95% Student's-t UCL 287.4 95% H-UCL 111.7
97.5% Chebyshev(Mean, Sd) UCL 686.3
Assuming Gamma Distribution 99% Chebyshev(Mean, Sd) UCL 1010
95% Chebyshev(Mean, Sd) UCL 521.6Data not Gamma Distributed at 5% Significance Level
Kolmogorov-Smirnov 5% Critical Value 0.135 95% BCA Bootstrap UCL 409
95% Hall's Bootstrap UCL 755.4
Kolmogorov-Smirnov Test Statistic 0.364 95% Percentile Bootstrap UCL 313.4
Anderson-Darling 5% Critical Value 0.854
95% Standard Bootstrap UCL 278.6
Anderson-Darling Test Statistic 8.12 95% Bootstrap-t UCL 887.8
Adjusted Chi Square Value 20.5 95% Jackknife UCL 287.4
Adjusted Level of Significance 0.0452 95% CLT UCL 284.6
Approximate Chi Square Value (.05) 20.79 Nonparametric Statistics
nu star 32.9
MLE of Standard Deviation 245.9
MLE of Mean 141
Theta Star 428.7
Data Distribution
k star (bias corrected) 0.329 Data do not follow a Discernable Distribution (0.05)
Gamma Distribution Test
95% Modified-t UCL (Johnson-1978) 301.1 99% Chebyshev (MVUE) UCL 215.7
95% Adjusted-CLT UCL (Chen-1995) 372.4
95% UCLs (Adjusted for Skewness) 95% Chebyshev (MVUE) UCL 126.1
97.5% Chebyshev (MVUE) UCL
Assuming Normal Distribution Assuming Lognormal Distribution
Shapiro Wilk Critical Value 0.947
Data not Normal at 5% Significance Level Data not Lognormal at 5% Significance Level
Shapiro Wilk Critical Value
Normal Distribution Test Lognormal Distribution Test
Shapiro Wilk Test Statistic 0.236 Shapiro Wilk Test Statistic 0.825
Skewness 6.649
Coefficient of Variation 4.377
Median 13.3 SD of log Data 1.512
Mean 141
Maximum 4330 Maximum of Log Data 8.373
Minimum 3 Minimum of Log Data 1.099
Number of Valid Observations 50 Number of Distinct Observations 47
General Statistics
Chemical (nickel)
Note: Suggestions regarding the selection of a 95% UCL are provided to help the user to select the most appropriate 95% UCL.
These recommendations are based upon the results of the simulation studies summarized in Singh, Maichle, and Lee (2006).
For additional insight, the user may want to consult a statistician.
Note: DL/2 is not a recommended method.
95% Adjusted Gamma UCL 16.23
95% Gamma Approximate UCL 15.83
Theta star 66.27
k star 0.0986 99% KM (Chebyshev) UCL 38.99
SD 24.39 97.5% KM (Chebyshev) UCL 26.74
95% KM (Percentile Bootstrap) UCL 12.87
Median 0.96 95% KM (Chebyshev) UCL 20.51
Mean 6.535
95% KM (bootstrap t) UCL 30.46
Maximum 180 95% KM (BCA) UCL 13.04
Minimum 1E-12
Gamma ROS Statistics using Extrapolated Data 95% KM (jackknife) UCL 11.6
95% KM (z) UCL 11.53Assuming Gamma Distribution
95% KM (t) UCL 11.63
SE of Mean 3.307Data not Gamma Distributed at 5% Significance Level
5% K-S Critical Value 0.156 SD 24.19
K-S Test Statistic 0.838 Mean 6.093
5% A-D Critical Value 0.838 Kaplan-Meier (KM) Method
A-D Test Statistic 1.522 Nonparametric Statistics
Page 29 of 39
EXPOSED SOILS (0-0.5 FEET BGS) 95% Approximate Gamma UCL 223.2
95% Adjusted Gamma UCL 226.3
Mean in Original Scale 20.01
MLE yields a negative mean
Mean 20.01
Theta star 126.7
k star 0.158 99% KM (Chebyshev) UCL 75.75
SD 41.51 97.5% KM (Chebyshev) UCL 55
Mean 20.01
Median 0.81 95% KM (Chebyshev) UCL 44.43
95% KM (Percentile Bootstrap) UCL 29.68
Maximum 220 95% KM (BCA) UCL 29.88
Minimum 1E-12 95% KM (bootstrap t) UCL 34.58
Gamma ROS Statistics using Extrapolated Data 95% KM (jackknife) UCL 29.38
95% KM (z) UCL 29.23Assuming Gamma Distribution
95% KM (t) UCL 29.39
SE of Mean 5.602Data not Gamma Distributed at 5% Significance Level
5% K-S Critical Value 0.137 SD 41.13
Kaplan-Meier (KM) Method
K-S Test Statistic 0.871 Mean 20.01
5% A-D Critical Value 0.871
A-D Test Statistic 1.4 Nonparametric Statistics
nu star 27.64
Theta Star 79.64
Data Distribution Test with Detected Values Only
k star (bias corrected) 0.276 Data do not follow a Discernable Distribution (0.05)
Gamma Distribution Test with Detected Values Only
95% BCA Bootstrap UCL 33.2
95% Percentile Bootstrap UCL 29.85
95% t UCL 29.38
SD in Original Scale 41.51
SD in Log Scale 3.17
Mean in Log Scale 0.0923
Maximum Likelihood Estimate(MLE) Method N/A Log ROS Method
95% DL/2 (t) UCL 29.38 95% H-Stat (DL/2) UCL 938.9
Mean 0.194
SD 41.51 SD 3
DL/2 Substitution Method DL/2 Substitution Method
Assuming Normal Distribution Assuming Lognormal Distribution
Data not Normal at 5% Significance Level Data not Lognormal at 5% Significance Level
5% Shapiro Wilk Critical Value 0.947 5% Shapiro Wilk Critical Value 0.947
Normal Distribution Test with Detected Values Only Lognormal Distribution Test with Detected Values Only
Shapiro Wilk Test Statistic 0.587 Shapiro Wilk Test Statistic 0.923
UCL Statistics
Single DL Non-Detect Percentage 43.64%Observations < Largest ND are treated as NDs
Note: Data have multiple DLs - Use of KM Method is recommended
Number treated as Detected 31
Number treated as Non-Detect 24
For all methods (except KM, DL/2, and ROS Methods),
Minimum Non-Detect -3.912
Maximum Non-Detect 0.33 Maximum Non-Detect -1.109
Minimum Non-Detect 0.02
Mean of Detected 0.599
SD of Detected 2.819SD of Detected 43.06
Mean of Detected 22.01
Maximum Detected 220 Maximum Detected 5.394
Minimum Detected 0.022 Minimum Detected -3.817
Raw Statistics Log-transformed Statistics
Percent Non-Detects 9.09%
Number of Distinct Detected Data 44 Number of Non-Detect Data 5
Number of Valid Data 55 Number of Detected Data 50
General Statistics
Chemical (phenanthrene)
Note: Suggestions regarding the selection of a 95% UCL are provided to help the user to select the most appropriate 95% UCL.
These recommendations are based upon the results of the simulation studies summarized in Singh, Singh, and Iaci (2002)
and Singh and Singh (2003). For additional insight, the user may want to consult a statistician.
Potential UCL to Use Use 95% Chebyshev (Mean, Sd) UCL 521.6
Page 30 of 39
EXPOSED SOILS (0-0.5 FEET BGS)Potential UCLs to Use
AppChi2 8.939 99% KM (Chebyshev) UCL 75.75
For all methods (except KM, DL/2, and ROS Methods), Number treated as Detected 35
5% Shapiro Wilk Critical Value 0.947
Normal Distribution Test with Detected Values Only Lognormal Distribution Test with Detected Values Only
Shapiro Wilk Test Statistic 0.61 Shapiro Wilk Test Statistic 0.907
k star 0.145 99% KM (Chebyshev) UCL 133.3
SD 71.92 97.5% KM (Chebyshev) UCL 97.34
Median 1.7 95% KM (Chebyshev) UCL 79.03
Mean 36.7 95% KM (Percentile Bootstrap) UCL 53.87
95% KM (bootstrap t) UCL 59.46
Maximum 340 95% KM (BCA) UCL 54.15
Minimum 1E-12
Assuming Gamma Distribution 95% KM (z) UCL 52.68
Gamma ROS Statistics using Extrapolated Data 95% KM (jackknife) UCL 52.94
95% KM (t) UCL 52.96
SE of Mean 9.708Data not Gamma Distributed at 5% Significance Level
K-S Test Statistic 0.871
5% K-S Critical Value 0.138 SD 71.26
Mean 36.71
5% A-D Critical Value 0.871 Kaplan-Meier (KM) Method
A-D Test Statistic 1.28 Nonparametric Statistics
nu star 27.2
Data do not follow a Discernable Distribution (0.05)k star (bias corrected) 0.278
Theta Star 148.4
Gamma Distribution Test with Detected Values Only Data Distribution Test with Detected Values Only
95% BCA Bootstrap UCL 56.02
95% Percentile Bootstrap UCL 54.52
95% t UCL 52.94
Mean in Original Scale 36.71
95% MLE (Tiku) UCL 33.69 SD in Original Scale 71.92
95% MLE (t) UCL 31.7
SD 97.59 SD in Log Scale 3.366
Mean 9.683 Mean in Log Scale 0.6
Maximum Likelihood Estimate(MLE) Method Log ROS Method
95% DL/2 (t) UCL 52.94 95% H-Stat (DL/2) UCL 3989
SD 71.92 SD 3.211
Mean 36.71 Mean 0.695
Assuming Normal Distribution Assuming Lognormal Distribution
DL/2 Substitution Method DL/2 Substitution Method
Data not Normal at 5% Significance Level Data not Lognormal at 5% Significance Level
5% Shapiro Wilk Critical Value 0.947
UCL Statistics
Observations < Largest ND are treated as NDs Single DL Non-Detect Percentage 36.36%
Note: Data have multiple DLs - Use of KM Method is recommended Number treated as Non-Detect 20
Minimum Non-Detect -3.912
Maximum Non-Detect 0.33 Maximum Non-Detect -1.109
Minimum Non-Detect 0.02
Mean of Detected 1.24
SD of Detected 2.939SD of Detected 75.03
Mean of Detected 41.2
Maximum Detected 340 Maximum Detected 5.829
Minimum Detected 0.027 Minimum Detected -3.612
Raw Statistics Log-transformed Statistics
Percent Non-Detects 10.91%
Number of Distinct Detected Data 45 Number of Non-Detect Data 6
Number of Valid Data 55 Number of Detected Data 49
General Statistics
Chemical (pyrene)
These recommendations are based upon the results of the simulation studies summarized in Singh, Maichle, and Lee (2006).
For additional insight, the user may want to consult a statistician.
Note: DL/2 is not a recommended method.
Note: Suggestions regarding the selection of a 95% UCL are provided to help the user to select the most appropriate 95% UCL.
95% Adjusted Gamma UCL 39.61
95% Gamma Approximate UCL 38.89
Nu star 17.37
Page 31 of 39
EXPOSED SOILS (0-0.5 FEET BGS)
Number of Valid Data 50 Number of Detected Data 10
0.354
Maximum Likelihood Estimate(MLE) Method N/A Log ROS Method
Minimum 0.17 95% KM (bootstrap t) UCL 0.275
95% KM (Percentile Bootstrap) UCL 0.273
Maximum 0.58 95% KM (BCA) UCL 0.274
SD 0.0809 97.5% KM (Chebyshev) UCL 0.35
Median 0.277 95% KM (Chebyshev) UCL 0.318
Mean 0.299
Assuming Gamma Distribution 95% KM (z) UCL 0.272
Gamma ROS Statistics using Extrapolated Data 95% KM (jackknife) UCL 0.276
95% KM (t) UCL 0.272
SE of Mean 0.0171Data appear Gamma Distributed at 5% Significance Level
Mean 0.243
5% K-S Critical Value 0.267 SD 0.0803
K-S Test Statistic 0.727
5% A-D Critical Value 0.727 Kaplan-Meier (KM) Method
A-D Test Statistic 0.305 Nonparametric Statistics
nu star 106.4
Theta Star 0.0653
k star (bias corrected) 5.318 Data appear Normal at 5% Significance Level
Gamma Distribution Test with Detected Values Only Data Distribution Test with Detected Values Only
95% BCA Bootstrap UCL 0.272
95% Percentile Bootstrap UCL 0.27
95% t UCL 0.27
SD in Original Scale 0.0938
Mean in Original Scale 0.248
MLE yields a negative mean Mean in Log Scale -1.458
SD in Log Scale
95% DL/2 (t) UCL 0.195 95% H-Stat (DL/2) UCL 0.185
Mean -1.889
SD 0.106 SD 0.421
Mean 0.169
Assuming Normal Distribution Assuming Lognormal Distribution
DL/2 Substitution Method DL/2 Substitution Method
Data appear Normal at 5% Significance Level Data appear Lognormal at 5% Significance Level
5% Shapiro Wilk Critical Value 0.842 5% Shapiro Wilk Critical Value 0.842
Shapiro Wilk Test Statistic 0.947 Shapiro Wilk Test Statistic 0.951
UCL Statistics
Normal Distribution Test with Detected Values Only Lognormal Distribution Test with Detected Values Only
Maximum Non-Detect 0.25 Maximum Non-Detect -1.386
Minimum Non-Detect 0.25 Minimum Non-Detect -1.386
SD of Detected 0.132 SD of Detected 0.395
Mean of Detected 0.347 Mean of Detected -1.126
Maximum Detected 0.58 Maximum Detected -0.545
Raw Statistics Log-transformed Statistics
Minimum Detected 0.17 Minimum Detected -1.772
Percent Non-Detects 80.00%
Number of Distinct Detected Data 9 Number of Non-Detect Data 40
Chemical (silver)
General Statistics
Note: Suggestions regarding the selection of a 95% UCL are provided to help the user to select the most appropriate 95% UCL.
For additional insight, the user may want to consult a statistician.
These recommendations are based upon the results of the simulation studies summarized in Singh, Maichle, and Lee (2006).
Note: DL/2 is not a recommended method.
95% Gamma Approximate UCL 73.82
95% Adjusted Gamma UCL 75.27
AppChi2 7.939 99% KM (Chebyshev) UCL 133.3
Nu star 15.97 Potential UCLs to Use
Theta star 252.9
Page 32 of 39
EXPOSED SOILS (0-0.5 FEET BGS)k star 14.86 99% KM (Chebyshev) UCL 0.414
95% Gamma Approximate UCL 0.318 95% KM (Percentile Bootstrap) UCL 0.273
Minimum Non-Detect -8.335
Maximum Detected 0.99
Number treated as Detected 1
SD in Original Scale 0.133
95% Percentile Bootstrap UCL 0.0561
95% t UCL 0.0504
k star (bias corrected) 0.246 Data do not follow a Discernable Distribution (0.05)
Theta Star 0.3
95% KM (bootstrap t) UCL 0.925
Assuming Gamma Distribution
Data not Gamma Distributed at 5% Significance Level
Minimum 1E-12
Gamma ROS Statistics using Extrapolated Data 95% KM (jackknife) UCL 0.0507
95% KM (z) UCL 0.0512
95% KM (t) UCL 0.0517
SE of Mean 0.0185
5% K-S Critical Value 0.242 SD 0.132
K-S Test Statistic 0.855 Mean 0.0208
Nonparametric Statistics
5% A-D Critical Value 0.855 Kaplan-Meier (KM) Method
A-D Test Statistic 2.839
nu star 7.377
Gamma Distribution Test with Detected Values Only Data Distribution Test with Detected Values Only
95% BCA Bootstrap UCL 0.0752
SD in Log Scale 2.569
Mean in Original Scale 0.0203
Mean in Log Scale -8.527MLE method failed to converge properly
Maximum Likelihood Estimate(MLE) Method N/A Log ROS Method
95% H-Stat (DL/2) UCL 0.0392 95% DL/2 (t) UCL 0.0679
Mean -6.144
SD 0.143 SD 1.965
Mean 0.0357
DL/2 Substitution Method DL/2 Substitution Method
Assuming Normal Distribution Assuming Lognormal Distribution
Data not Normal at 5% Significance Level Data not Lognormal at 5% Significance Level
5% Shapiro Wilk Critical Value 0.881 5% Shapiro Wilk Critical Value 0.881
Shapiro Wilk Test Statistic 0.32 Shapiro Wilk Test Statistic 0.802
Normal Distribution Test with Detected Values Only Lognormal Distribution Test with Detected Values Only
UCL Statistics
Observations < Largest ND are treated as NDs Single DL Non-Detect Percentage 98.18%
For all methods (except KM, DL/2, and ROS Methods),
Note: Data have multiple DLs - Use of KM Method is recommended Number treated as Non-Detect 54
Maximum Non-Detect 0.5 Maximum Non-Detect -0.693
Minimum Non-Detect 0.00024
SD of Detected 0.254 SD of Detected 1.927
Maximum Detected -0.0101
Mean of Detected 0.0737 Mean of Detected -5.425
Raw Statistics Log-transformed Statistics
Minimum Detected 0.00062 Minimum Detected -7.386
Percent Non-Detects 72.73%
Number of Distinct Detected Data 13 Number of Non-Detect Data 40
Number of Valid Data 55 Number of Detected Data 15
Chemical (toluene)
General Statistics
For additional insight, the user may want to consult a statistician.
These recommendations are based upon the results of the simulation studies summarized in Singh, Maichle, and Lee (2006).
Note: Suggestions regarding the selection of a 95% UCL are provided to help the user to select the most appropriate 95% UCL.
Note: DL/2 is not a recommended method.
95% Adjusted Gamma UCL 0.318
AppChi2 1397 95% KM (t) UCL 0.272
Nu star 1486 Potential UCLs to Use
Theta star 0.0201
Page 33 of 39
EXPOSED SOILS (0-0.5 FEET BGS)
99% KM (Chebyshev) UCL 0.204
Mean 0.0636 95% KM (Percentile Bootstrap) UCL 0.0567
Normal Distribution Test with Detected Values Only Lognormal Distribution Test with Detected Values Only
SD of Detected 3.568
5% Shapiro Wilk Critical Value 0.842 5% Shapiro Wilk Critical Value 0.842
DL/2 Substitution Method DL/2 Substitution Method
Data Distribution Test with Detected Values Only
Mean in Log Scale -0.64
Maximum Likelihood Estimate(MLE) Method N/A Log ROS Method
Assuming Gamma Distribution
Data appear Gamma Distributed at 5% Significance Level
Mean 5.017 95% KM (Percentile Bootstrap) UCL 3.1
Maximum 13 95% KM (BCA) UCL 3.364
Minimum 1E-12 95% KM (bootstrap t) UCL 3.701
Gamma ROS Statistics using Extrapolated Data 95% KM (jackknife) UCL 2.694
95% KM (z) UCL 2.788
95% KM (t) UCL 2.824
SE of Mean 0.548
5% K-S Critical Value 0.271 SD 2.601
K-S Test Statistic 0.738 Mean 1.886
Nonparametric StatisticsA-D Test Statistic 0.348
5% A-D Critical Value 0.738 Kaplan-Meier (KM) Method
nu star 24.66
k star (bias corrected) 1.233 Data appear Gamma Distributed at 5% Significance Level
Theta Star 2.997
Gamma Distribution Test with Detected Values Only
95% BCA Bootstrap UCL 3.048
95% Percentile Bootstrap UCL 2.564
95% t UCL 2.588
SD in Original Scale 2.783
Mean in Original Scale 1.636
MLE yields a negative mean
SD in Log Scale 1.637
95% DL/2 (t) UCL 2.58 95% H-Stat (DL/2) UCL 3.168
SD 2.782 SD 1.291
Mean 1.628 Mean -0.441
Assuming Normal Distribution Assuming Lognormal Distribution
Data not Normal at 5% Significance Level Data appear Lognormal at 5% Significance Level
Shapiro Wilk Test Statistic 0.738 Shapiro Wilk Test Statistic 0.97
UCL Statistics
Maximum Non-Detect 0.5 Maximum Non-Detect -0.693
SD of Detected 0.846
Minimum Non-Detect 0.5 Minimum Non-Detect -0.693
Maximum Detected 2.565
Mean of Detected 3.695 Mean of Detected 0.978
Maximum Detected 13
Minimum Detected 0.68 Minimum Detected -0.386
Raw Statistics Log-transformed Statistics
Percent Non-Detects 60.00%
Number of Distinct Detected Data 8 Number of Non-Detect Data 15
Number of Valid Data 25 Number of Detected Data 10
General Statistics
Chemical (total cyanide)
For additional insight, the user may want to consult a statistician.
These recommendations are based upon the results of the simulation studies summarized in Singh, Maichle, and Lee (2006).
Note: Suggestions regarding the selection of a 95% UCL are provided to help the user to select the most appropriate 95% UCL.
Note: DL/2 is not a recommended method.
95% Adjusted Gamma UCL 0.109
95% Gamma Approximate UCL 0.107
Potential UCLs to Use
AppChi2 15.62 95% KM (Chebyshev) UCL 0.101
Nu star 26.31
Theta star 0.266
k star 0.239
SD 0.132 97.5% KM (Chebyshev) UCL 0.136
Median 0.0665 95% KM (Chebyshev) UCL 0.101
Maximum 0.99 95% KM (BCA) UCL 0.0569
Page 34 of 39
EXPOSED SOILS (0-0.5 FEET BGS)
95% KM (t) UCL 2.824
Lognormal Distribution Test with Detected Values Only
SD of Detected 1.832
Raw Statistics Log-transformed Statistics
5% Shapiro Wilk Critical Value 0.947 5% Shapiro Wilk Critical Value 0.947
DL/2 Substitution Method DL/2 Substitution Method
95% DL/2 (t) UCL 1337 95% H-Stat (DL/2) UCL 8245
Data Follow Appr. Gamma Distribution at 5% Significance Level
Median 280 95% KM (Chebyshev) UCL 1902
Maximum 6500
Mean 986.1 95% KM (Percentile Bootstrap) UCL 1336
95% KM (BCA) UCL 1372
Gamma ROS Statistics using Extrapolated Data
Minimum 1E-12 95% KM (bootstrap t) UCL 1419
95% KM (jackknife) UCL 1337
Assuming Gamma Distribution 95% KM (z) UCL 1332
95% KM (t) UCL 1338
SE of Mean 209.9Data follow Appr. Gamma Distribution at 5% Significance Level
Mean 986.6
5% K-S Critical Value 0.132 SD 1541
K-S Test Statistic 0.814
Nonparametric Statistics
5% A-D Critical Value 0.814 Kaplan-Meier (KM) Method
A-D Test Statistic 0.958
nu star 48.52
Theta Star 2236
k star (bias corrected) 0.485
Gamma Distribution Test with Detected Values Only Data Distribution Test with Detected Values Only
95% BCA Bootstrap UCL 1362
95% Percentile Bootstrap UCL 1350
95% t UCL 1337
95% MLE (Tiku) UCL 1241 SD in Original Scale 1555
95% MLE (t) UCL 1264 Mean in Original Scale 986.5
SD 1648 SD in Log Scale 2.14
Mean 892 Mean in Log Scale 5.34
Maximum Likelihood Estimate(MLE) Method Log ROS Method
SD 1555 SD 2.234
Mean 986.3 Mean 5.287
Assuming Normal Distribution Assuming Lognormal Distribution
Data not Normal at 5% Significance Level Data appear Lognormal at 5% Significance Level
Shapiro Wilk Test Statistic 0.697 Shapiro Wilk Test Statistic 0.957
UCL Statistics
Normal Distribution Test with Detected Values Only
Maximum Non-Detect 5 Maximum Non-Detect 1.609
SD of Detected 1599
Minimum Non-Detect 5 Minimum Non-Detect 1.609
Mean of Detected 1085 Mean of Detected 5.724
Maximum Detected 6500 Maximum Detected 8.78
Minimum Detected 5.8 Minimum Detected 1.758
Percent Non-Detects 9.09%
Number of Distinct Detected Data 42 Number of Non-Detect Data 5
Number of Valid Data 55 Number of Detected Data 50
General Statistics
Chemical (tph-d)
For additional insight, the user may want to consult a statistician.
These recommendations are based upon the results of the simulation studies summarized in Singh, Maichle, and Lee (2006).
Note: Suggestions regarding the selection of a 95% UCL are provided to help the user to select the most appropriate 95% UCL.
95% Adjusted Gamma UCL 9.485
Note: DL/2 is not a recommended method.
95% Gamma Approximate UCL 9.095
AppChi2 11.56
Nu star 20.96 Potential UCLs to Use
Theta star 11.97
k star 0.419 99% KM (Chebyshev) UCL 7.342
SD 3.826 97.5% KM (Chebyshev) UCL 5.311
Median 4.2 95% KM (Chebyshev) UCL 4.276
Page 35 of 39
EXPOSED SOILS (0-0.5 FEET BGS)
Number of Non-Detect Data 48
Number of Valid Data 55 Number of Detected Data 7
Minimum Detected 0.028 Minimum Detected -3.576
Maximum Non-Detect 5 Maximum Non-Detect 1.609
Shapiro Wilk Test Statistic 0.474 Shapiro Wilk Test Statistic 0.882
Data not Normal at 5% Significance Level Data appear Lognormal at 5% Significance Level
Mean 6.52 Mean -1.093
5% A-D Critical Value 0.829 Kaplan-Meier (KM) Method
A-D Test Statistic 0.949 Nonparametric Statistics
nu star 2.763
Theta Star 247.6
k star (bias corrected) 0.197 Data Follow Appr. Gamma Distribution at 5% Significance Level
Gamma Distribution Test with Detected Values Only Data Distribution Test with Detected Values Only
95% BCA Bootstrap UCL 30.47
95% Percentile Bootstrap UCL 18.48
95% t UCL 16.57
SD in Original Scale 44.45
Mean in Original Scale 6.538
MLE method failed to converge properly
SD in Log Scale 2.279
Mean in Log Scale -2.207
Maximum Likelihood Estimate(MLE) Method N/A Log ROS Method
95% DL/2 (t) UCL 16.55 95% H-Stat (DL/2) UCL 1.071
SD 44.45 SD 1.208
Assuming Normal Distribution Assuming Lognormal Distribution
DL/2 Substitution Method DL/2 Substitution Method
UCL Statistics
5% Shapiro Wilk Critical Value 0.803 5% Shapiro Wilk Critical Value 0.803
Normal Distribution Test with Detected Values Only Lognormal Distribution Test with Detected Values Only
It is recommended to have 10-15 or more distinct observations for accurate and meaningful results.
the resulting calculations may not be reliable enough to draw conclusions
Note: It should be noted that even though bootstrap may be performed on this data set
Warning: There are only 7 Detected Values in this data
Single DL Non-Detect Percentage 96.36%Observations < Largest ND are treated as NDs
Number treated as Detected 2For all methods (except KM, DL/2, and ROS Methods),
Number treated as Non-Detect 53Note: Data have multiple DLs - Use of KM Method is recommended
Minimum Non-Detect 0.5 Minimum Non-Detect -0.693
SD of Detected 124 SD of Detected 3.307
Mean of Detected 48.87 Mean of Detected -0.3
Maximum Detected 330 Maximum Detected 5.799
Raw Statistics Log-transformed Statistics
General Statistics
Percent Non-Detects 87.27%
Number of Distinct Detected Data 7
Chemical (tph-g)
For additional insight, the user may want to consult a statistician.
These recommendations are based upon the results of the simulation studies summarized in Singh, Maichle, and Lee (2006).
Note: Suggestions regarding the selection of a 95% UCL are provided to help the user to select the most appropriate 95% UCL.
Note: DL/2 is not a recommended method.
95% Adjusted Gamma UCL 1853
95% Gamma Approximate UCL 1822
AppChi2 10.76 95% KM (Chebyshev) UCL 1902
Nu star 19.87 Potential UCLs to Use
Theta star 5457
k star 0.181 99% KM (Chebyshev) UCL 3075
SD 1556 97.5% KM (Chebyshev) UCL 2297
Page 36 of 39
EXPOSED SOILS (0-0.5 FEET BGS)
44.07
K-S Test Statistic 0.829 Mean 6.315
Number of Distinct Detected Data 42 Number of Non-Detect Data 7
Minimum Detected 19 Minimum Detected 2.944
3.219
SD of Detected 3518 SD of Detected 1.896
SD 2.232
Data not Normal at 5% Significance Level Data not Lognormal at 5% Significance Level
SD in Original Scale 3395
Mean 1917
5% K-S Critical Value 0.135 SD 3364
K-S Test Statistic 0.815 Mean 2266
5% A-D Critical Value 0.815 Kaplan-Meier (KM) Method
A-D Test Statistic 1.126 Nonparametric Statistics
nu star 45.83
k star (bias corrected) 0.477 Data do not follow a Discernable Distribution (0.05)
Theta Star 5434
Data Distribution Test with Detected Values OnlyGamma Distribution Test with Detected Values Only
95% BCA Bootstrap UCL 3126
95% Percentile Bootstrap UCL 3003
95% t UCL 3032
95% MLE (Tiku) UCL 2735
95% MLE (t) UCL 2766 Mean in Original Scale 2266
Mean in Log Scale 6.061
SD 3762 SD in Log Scale 2.244
Maximum Likelihood Estimate(MLE) Method Log ROS Method
95% DL/2 (t) UCL 3032 95% H-Stat (DL/2) UCL 17730
SD 3395
Mean 2265 Mean 6.059
DL/2 Substitution Method DL/2 Substitution Method
Assuming Normal Distribution Assuming Lognormal Distribution
5% Shapiro Wilk Critical Value 0.947 5% Shapiro Wilk Critical Value 0.947
Shapiro Wilk Test Statistic 0.739 Shapiro Wilk Test Statistic 0.935
Normal Distribution Test with Detected Values Only Lognormal Distribution Test with Detected Values Only
UCL Statistics
Maximum Non-Detect 25 Maximum Non-Detect 3.219
Minimum Non-Detect 25 Minimum Non-Detect
Mean of Detected 2594 Mean of Detected 6.574
Maximum Detected 14000 Maximum Detected 9.547
Raw Statistics Log-transformed Statistics
Percent Non-Detects 12.73%
Chemical (tph-mo)
General Statistics
Number of Valid Data 55 Number of Detected Data 48
For additional insight, the user may want to consult a statistician.
These recommendations are based upon the results of the simulation studies summarized in Singh, Maichle, and Lee (2006).
Note: Suggestions regarding the selection of a 95% UCL are provided to help the user to select the most appropriate 95% UCL.
Note: DL/2 is not a recommended method.
95% Adjusted Gamma UCL 89.05
95% Gamma Approximate UCL 87.24
AppChi2 6.991 95% KM (t) UCL 17.06
Nu star 14.61 Potential UCLs to Use
99% KM (Chebyshev) UCL 70.18
Theta star 314.3
k star 0.133
95% KM (Chebyshev) UCL 34.29
SD 47.81 97.5% KM (Chebyshev) UCL 46.4
Median 52.29
Mean 41.74 95% KM (Percentile Bootstrap) UCL 18.31
Maximum 330 95% KM (BCA) UCL 18.33
Gamma ROS Statistics using Extrapolated Data
Minimum 1E-12 95% KM (bootstrap t) UCL 1365
95% KM (jackknife) UCL 16.35
95% KM (z) UCL 16.87Assuming Gamma Distribution
95% KM (t) UCL 17.06
5% K-S Critical Value 0.343
Data follow Appr. Gamma Distribution at 5% Significance Level SE of Mean 6.419
SD
Page 37 of 39
EXPOSED SOILS (0-0.5 FEET BGS)
99% KM (Chebyshev) UCL 6827
SD 3396 97.5% KM (Chebyshev) UCL 5129
4551
Nu star 15.99 Potential UCLs to Use
AppChi2 7.953 97.5% KM (Chebyshev) UCL 5129
Minimum 7.8 Minimum of Log Data 2.054
Coefficient of Variation 0.927
36.7
Shapiro Wilk Critical Value 0.947 Shapiro Wilk Critical Value 0.947
Data not Gamma Distributed at 5% Significance Level 95% Chebyshev(Mean, Sd) UCL 50.14
97.5% Chebyshev(Mean, Sd) UCL 58.03
95% Adjusted Gamma UCL 37.74
Potential UCL to Use Use 95% Chebyshev (Mean, Sd) UCL 50.14
Assuming Gamma Distribution 99% Chebyshev(Mean, Sd) UCL 73.53
95% Approximate Gamma UCL 37.56
95% Percentile Bootstrap UCL 39.34
Kolmogorov-Smirnov 5% Critical Value 0.127 95% BCA Bootstrap UCL 41.03
Kolmogorov-Smirnov Test Statistic 0.202
Anderson-Darling 5% Critical Value 0.761 95% Hall's Bootstrap UCL 48.27
Anderson-Darling Test Statistic 2.606 95% Bootstrap-t UCL 45.04
95% Jackknife UCL 38.92
95% Standard Bootstrap UCL 38.81
Adjusted Chi Square Value 188.4
Adjusted Level of Significance 0.0452 95% CLT UCL 38.79
Approximate Chi Square Value (.05) 189.3 Nonparametric Statistics
nu star 222.8
MLE of Standard Deviation 21.37
MLE of Mean 31.91
Theta Star 14.32
k star (bias corrected) 2.228 Data do not follow a Discernable Distribution (0.05)
Gamma Distribution Test Data Distribution
95% Adjusted-CLT UCL (Chen-1995) 40.87
95% Modified-t UCL (Johnson-1978) 39.24 99% Chebyshev (MVUE) UCL 59.41
97.5% Chebyshev (MVUE) UCL 48.7
95% Student's-t UCL 38.92
95% UCLs (Adjusted for Skewness) 95% Chebyshev (MVUE) UCL 43.26
95% H-UCL
Assuming Lognormal DistributionAssuming Normal Distribution
Data not Normal at 5% Significance Level Data not Lognormal at 5% Significance Level
Shapiro Wilk Test Statistic 0.587 Shapiro Wilk Test Statistic 0.918
Relevant UCL Statistics
Normal Distribution Test Lognormal Distribution Test
Skewness 3.304
SD 29.58
Median 24 SD of log Data 0.619
Mean 31.91 Mean of log Data 3.236
Maximum 157 Maximum of Log Data 5.056
Raw Statistics Log-transformed Statistics
Number of Valid Observations 50 Number of Distinct Observations 48
General Statistics
Chemical (vanadium)
These recommendations are based upon the results of the simulation studies summarized in Singh, Maichle, and Lee (2006).
For additional insight, the user may want to consult a statistician.
Note: Suggestions regarding the selection of a 95% UCL are provided to help the user to select the most appropriate 95% UCL.
Note: DL/2 is not a recommended method.
95% Adjusted Gamma UCL 4640
95% Gamma Approximate UCL
Theta star 15576
k star 0.145
95% KM (Chebyshev) UCL 4264Median 570
Mean 2264 95% KM (Percentile Bootstrap) UCL 3057
Maximum 14000 95% KM (BCA) UCL 3014
95% KM (jackknife) UCL 3032
Minimum 1E-12 95% KM (bootstrap t) UCL 3169
Gamma ROS Statistics using Extrapolated Data
95% KM (t) UCL 3033
95% KM (z) UCL 3020Assuming Gamma Distribution
SE of Mean 458.4Data not Gamma Distributed at 5% Significance Level
Page 38 of 39
EXPOSED SOILS (0-0.5 FEET BGS)Note: Suggestions regarding the selection of a 95% UCL are provided to help the user to select the most appropriate 95% UCL.
These recommendations are based upon the results of the simulation studies summarized in Singh, Singh, and Iaci (2002)
and Singh and Singh (2003). For additional insight, the user may want to consult a statistician.
Chemical (zinc)
General Statistics
Number of Valid Observations 50 Number of Distinct Observations 49
Raw Statistics Log-transformed Statistics
Minimum 16 Minimum of Log Data 2.773
Maximum 384 Maximum of Log Data 5.951
Mean 93.63 Mean of log Data 4.309
Median 80.5 SD of log Data 0.702
SD 68.07
Coefficient of Variation 0.727
Skewness 2.08
Relevant UCL Statistics
Normal Distribution Test Lognormal Distribution Test
Shapiro Wilk Test Statistic 0.831 Shapiro Wilk Test Statistic 0.974
Shapiro Wilk Critical Value 0.947 Shapiro Wilk Critical Value 0.947
Data not Normal at 5% Significance Level Data appear Lognormal at 5% Significance Level
Assuming Normal Distribution Assuming Lognormal Distribution
95% Student's-t UCL 109.8 95% H-UCL 116.7
95% UCLs (Adjusted for Skewness) 95% Chebyshev (MVUE) UCL 139.4
95% Adjusted-CLT UCL (Chen-1995) 112.5 97.5% Chebyshev (MVUE) UCL 158.8
95% Modified-t UCL (Johnson-1978) 110.2 99% Chebyshev (MVUE) UCL 196.8
Gamma Distribution Test Data Distribution
k star (bias corrected) 2.199 Data appear Gamma Distributed at 5% Significance Level
Theta Star 42.58
MLE of Mean 93.63
MLE of Standard Deviation 63.14
nu star 219.9
Approximate Chi Square Value (.05) 186.6 Nonparametric Statistics
Adjusted Level of Significance 0.0452 95% CLT UCL 109.5
Adjusted Chi Square Value 185.7 95% Jackknife UCL 109.8
95% Standard Bootstrap UCL 109.4
Anderson-Darling Test Statistic 0.311 95% Bootstrap-t UCL 112.7
Anderson-Darling 5% Critical Value 0.761 95% Hall's Bootstrap UCL 118.9
Kolmogorov-Smirnov Test Statistic 0.0666 95% Percentile Bootstrap UCL 110.7
Kolmogorov-Smirnov 5% Critical Value 0.127 95% BCA Bootstrap UCL 111.4
Data appear Gamma Distributed at 5% Significance Level 95% Chebyshev(Mean, Sd) UCL 135.6
97.5% Chebyshev(Mean, Sd) UCL 153.7
Assuming Gamma Distribution 99% Chebyshev(Mean, Sd) UCL 189.4
95% Approximate Gamma UCL 110.3
95% Adjusted Gamma UCL 110.9
Note: Suggestions regarding the selection of a 95% UCL are provided to help the user to select the most appropriate 95% UCL.
These recommendations are based upon the results of the simulation studies summarized in Singh, Singh, and Iaci (2002)
and Singh and Singh (2003). For additional insight, the user may want to consult a statistician.
Potential UCL to Use Use 95% Approximate Gamma UCL 110.3
Page 39 of 39
ON-SITE SOILS (0-10 FEET BGS)
Maximum 12.28 95% KM (BCA) UCL 0.134
Minimum 1E-12 95% KM (bootstrap t) UCL 0.0427
Assuming Gamma Distribution 95% KM (z) UCL 0.0397
Gamma ROS Statistics using Extrapolated Data 95% KM (jackknife) UCL 0.0386
Data appear Gamma Distributed at 5% Significance Level SE of Mean 0.00422
95% KM (t) UCL 0.0397
5% K-S Critical Value 0.286 SD 0.0535
K-S Test Statistic 0.739 Mean 0.0328
A-D Test Statistic 0.28 Nonparametric Statistics
5% A-D Critical Value 0.739 Kaplan-Meier (KM) Method
nu star 16.05
k star (bias corrected) 0.892 Data appear Normal at 5% Significance Level
Theta Star 0.22
Gamma Distribution Test with Detected Values Only Data Distribution Test with Detected Values Only
95% BCA Bootstrap UCL 0.0202
95% Percentile Bootstrap UCL 0.0175
95% t UCL 0.017
SD in Original Scale 0.0539
Mean in Original Scale 0.0108
MLE method failed to converge properly Mean in Log Scale -7.743
SD in Log Scale 2.573
Maximum Likelihood Estimate(MLE) Method N/A Log ROS Method
95% DL/2 (t) UCL 10.72 95% H-Stat (DL/2) UCL 0.196
SD 49.25 SD 1.823
Mean 5.037 Mean -3.67
Assuming Normal Distribution Assuming Lognormal Distribution
DL/2 Substitution Method DL/2 Substitution Method
Data appear Normal at 5% Significance Level Data appear Lognormal at 5% Significance Level
5% Shapiro Wilk Critical Value 0.829 5% Shapiro Wilk Critical Value 0.829
Normal Distribution Test with Detected Values Only Lognormal Distribution Test with Detected Values Only
Shapiro Wilk Test Statistic 0.861 Shapiro Wilk Test Statistic 0.944
It is recommended to have 10-15 or more distinct observations for accurate and meaningful results.
UCL Statistics
Warning: There are only 9 Detected Values in this data
Note: It should be noted that even though bootstrap may be performed on this data set
the resulting calculations may not be reliable enough to draw conclusions
Observations < Largest ND are treated as NDs Single DL Non-Detect Percentage 100.00%
Note: Data have multiple DLs - Use of KM Method is recommended Number treated as Non-Detect 205
For all methods (except KM, DL/2, and ROS Methods), Number treated as Detected 0
Maximum Non-Detect 1000 Maximum Non-Detect 6.908
Minimum Non-Detect 0.02 Minimum Non-Detect -3.912
SD of Detected 0.182 SD of Detected 1.096
Mean of Detected 0.197 Mean of Detected -2.087
Maximum Detected 0.55 Maximum Detected -0.598
Raw Statistics Log-transformed Statistics
Minimum Detected 0.024 Minimum Detected -3.73
Percent Non-Detects 95.61%
Number of Distinct Detected Data 9 Number of Non-Detect Data 196
General Statistics
Number of Valid Data 205 Number of Detected Data 9
Chemical (1-methylnaphthalene)
Confidence Coefficient 95%
Number of Bootstrap Operations 2000
From File qryProUCLVer4_ForOutput_10ft.wst
Full Precision OFF
General UCL Statistics for Data Sets with Non-Detects
User Selected Options
Page 1 of 42
ON-SITE SOILS (0-10 FEET BGS)
Minimum 1E-12 95% KM (bootstrap t) UCL 3528
Assuming Gamma Distribution 95% KM (z) UCL 12.56
Gamma ROS Statistics using Extrapolated Data 95% KM (jackknife) UCL 12.44
Data not Gamma Distributed at 5% Significance Level SE of Mean 4.767
95% KM (t) UCL 12.6
5% K-S Critical Value 0.203 SD 68.2
K-S Test Statistic 0.916 Mean 4.721
A-D Test Statistic 6.253 Nonparametric Statistics
5% A-D Critical Value 0.916 Kaplan-Meier (KM) Method
nu star 7.122
k star (bias corrected) 0.155 Data do not follow a Discernable Distribution (0.05)
Theta Star 282.4
Gamma Distribution Test with Detected Values Only Data Distribution Test with Detected Values Only
95% BCA Bootstrap UCL 18.73
95% Percentile Bootstrap UCL 14.04
95% t UCL 12.42
SD in Original Scale 68.36
Mean in Original Scale 4.7
MLE method failed to converge properly Mean in Log Scale -9.233
SD in Log Scale 4.344
Maximum Likelihood Estimate(MLE) Method N/A Log ROS Method
95% DL/2 (t) UCL 15.8 95% H-Stat (DL/2) UCL 0.269
SD 76.27 SD 1.901
Mean 7.186 Mean -3.517
Assuming Normal Distribution Assuming Lognormal Distribution
DL/2 Substitution Method DL/2 Substitution Method
Data not Normal at 5% Significance Level Data not Lognormal at 5% Significance Level
5% Shapiro Wilk Critical Value 0.914 5% Shapiro Wilk Critical Value 0.914
UCL Statistics
Normal Distribution Test with Detected Values Only Lognormal Distribution Test with Detected Values Only
Shapiro Wilk Test Statistic 0.217 Shapiro Wilk Test Statistic 0.736
Observations < Largest ND are treated as NDs Single DL Non-Detect Percentage 99.53%
Note: Data have multiple DLs - Use of KM Method is recommended Number treated as Non-Detect 213
For all methods (except KM, DL/2, and ROS Methods), Number treated as Detected 1
Maximum Non-Detect 1000 Maximum Non-Detect 6.908
Minimum Non-Detect 0.02 Minimum Non-Detect -3.912
SD of Detected 208.5 SD of Detected 2.207
Mean of Detected 43.72 Mean of Detected -1.561
Maximum Detected 1000 Maximum Detected 6.908
Raw Statistics Log-transformed Statistics
Minimum Detected 0.021 Minimum Detected -3.863
Percent Non-Detects 89.25%
Number of Distinct Detected Data 18 Number of Non-Detect Data 191
General Statistics
Number of Valid Data 214 Number of Detected Data 23
For additional insight, the user may want to consult a statistician.
Chemical (2-methylnaphthalene)
Note: DL/2 is not a recommended method.
Note: Suggestions regarding the selection of a 95% UCL are provided to help the user to select the most appropriate 95% UCL.
These recommendations are based upon the results of the simulation studies summarized in Singh, Maichle, and Lee (2006).
95% Adjusted Gamma UCL 6.3
95% Gamma Approximate UCL 6.295 95% KM (Percentile Bootstrap) UCL 0.078
Nu star 408.6 Potential UCLs to Use
AppChi2 362.7 95% KM (t) UCL 0.0397
Theta star 5.608
k star 0.997 99% KM (Chebyshev) UCL 0.0748
SD 3.635 97.5% KM (Chebyshev) UCL 0.0591
Median 5.415 95% KM (Chebyshev) UCL 0.0512
Mean 5.589 95% KM (Percentile Bootstrap) UCL 0.078
Page 2 of 42
ON-SITE SOILS (0-10 FEET BGS)
Assuming Gamma Distribution 95% KM (z) UCL 0.202
Gamma ROS Statistics using Extrapolated Data 95% KM (jackknife) UCL 0.2
Data not Gamma Distributed at 5% Significance Level SE of Mean 0.0568
95% KM (t) UCL 0.202
5% K-S Critical Value 0.174 SD 0.926
K-S Test Statistic 0.853 Mean 0.108
A-D Test Statistic 5.318 Nonparametric Statistics
5% A-D Critical Value 0.853 Kaplan-Meier (KM) Method
nu star 17.63
k star (bias corrected) 0.294 Data do not follow a Discernable Distribution (0.05)
Theta Star 2.899
Gamma Distribution Test with Detected Values Only Data Distribution Test with Detected Values Only
95% BCA Bootstrap UCL 0.237
95% Percentile Bootstrap UCL 0.192
95% t UCL 0.184
SD in Original Scale 0.923
Mean in Original Scale 0.0931
MLE method failed to converge properly Mean in Log Scale -7.711
SD in Log Scale 3.018
Maximum Likelihood Estimate(MLE) Method N/A Log ROS Method
95% DL/2 (t) UCL 8.099 95% H-Stat (DL/2) UCL 0.316
SD 42.25 SD 1.943
Mean 3.924 Mean -3.396
Assuming Normal Distribution Assuming Lognormal Distribution
DL/2 Substitution Method DL/2 Substitution Method
Data not Normal at 5% Significance Level Data not Lognormal at 5% Significance Level
5% Shapiro Wilk Critical Value 0.927 5% Shapiro Wilk Critical Value 0.927
UCL Statistics
Normal Distribution Test with Detected Values Only Lognormal Distribution Test with Detected Values Only
Shapiro Wilk Test Statistic 0.336 Shapiro Wilk Test Statistic 0.799
Observations < Largest ND are treated as NDs Single DL Non-Detect Percentage 100.00%
Note: Data have multiple DLs - Use of KM Method is recommended Number treated as Non-Detect 279
For all methods (except KM, DL/2, and ROS Methods), Number treated as Detected 0
Maximum Non-Detect 1000 Maximum Non-Detect 6.908
Minimum Non-Detect 0.015 Minimum Non-Detect -4.2
SD of Detected 2.738 SD of Detected 1.69
Mean of Detected 0.852 Mean of Detected -2.444
Maximum Detected 12 Maximum Detected 2.485
Raw Statistics Log-transformed Statistics
Minimum Detected 0.015 Minimum Detected -4.2
Percent Non-Detects 89.25%
Number of Distinct Detected Data 28 Number of Non-Detect Data 249
General Statistics
Number of Valid Data 279 Number of Detected Data 30
For additional insight, the user may want to consult a statistician.
Chemical (acenaphthene)
Note: DL/2 is not a recommended method.
Note: Suggestions regarding the selection of a 95% UCL are provided to help the user to select the most appropriate 95% UCL.
These recommendations are based upon the results of the simulation studies summarized in Singh, Maichle, and Lee (2006).
95% Adjusted Gamma UCL 11954913
95% Gamma Approximate UCL 11924749
Nu star 48.1 Potential UCLs to Use
AppChi2 33.18 97.5% KM (Chebyshev) UCL 34.49
Theta star 73200252
k star 0.112 99% KM (Chebyshev) UCL 52.15
SD 15150062 97.5% KM (Chebyshev) UCL 34.49
Median 453373 95% KM (Chebyshev) UCL 25.5
Mean 8226079 95% KM (Percentile Bootstrap) UCL 14.07
Maximum 66004831 95% KM (BCA) UCL 14.07
Page 3 of 42
ON-SITE SOILS (0-10 FEET BGS)
Assuming Gamma Distribution 95% KM (z) UCL 46.41
Data not Gamma Distributed at 5% Significance Level SE of Mean 15.58
95% KM (t) UCL 46.49
5% K-S Critical Value 0.115 SD 258.6
K-S Test Statistic 0.952 Mean 20.78
A-D Test Statistic 13.88 Nonparametric Statistics
5% A-D Critical Value 0.952 Kaplan-Meier (KM) Method
nu star 23.95
k star (bias corrected) 0.156 Data do not follow a Discernable Distribution (0.05)
Theta Star 483.4
Gamma Distribution Test with Detected Values Only Data Distribution Test with Detected Values Only
95% BCA Bootstrap UCL 69.66
95% Percentile Bootstrap UCL 50.03
95% t UCL 46.35
SD in Original Scale 259.1
Mean in Original Scale 20.75
MLE yields a negative mean Mean in Log Scale -6.3
SD in Log Scale 4.566
Maximum Likelihood Estimate(MLE) Method N/A Log ROS Method
95% DL/2 (t) UCL 46.6 95% H-Stat (DL/2) UCL 1.427
SD 259.1 SD 2.357
Mean 21.01 Mean -2.922
Assuming Normal Distribution Assuming Lognormal Distribution
DL/2 Substitution Method DL/2 Substitution Method
Data not Normal at 5% Significance Level Data not Lognormal at 5% Significance Level
5% Lilliefors Critical Value 0.101 5% Lilliefors Critical Value 0.101
UCL Statistics
Normal Distribution Test with Detected Values Only Lognormal Distribution Test with Detected Values Only
Lilliefors Test Statistic 0.486 Lilliefors Test Statistic 0.129
Observations < Largest ND are treated as NDs Single DL Non-Detect Percentage 98.92%
Note: Data have multiple DLs - Use of KM Method is recommended Number treated as Non-Detect 276
For all methods (except KM, DL/2, and ROS Methods), Number treated as Detected 3
Maximum Non-Detect 60 Maximum Non-Detect 4.094
Minimum Non-Detect 0.02 Minimum Non-Detect -3.912
SD of Detected 491.3 SD of Detected 2.554
Mean of Detected 75.17 Mean of Detected -0.697
Maximum Detected 4100 Maximum Detected 8.319
Raw Statistics Log-transformed Statistics
Minimum Detected 0.023 Minimum Detected -3.772
Percent Non-Detects 72.40%
Number of Distinct Detected Data 63 Number of Non-Detect Data 202
General Statistics
Number of Valid Data 279 Number of Detected Data 77
For additional insight, the user may want to consult a statistician.
Chemical (acenaphthylene)
Note: DL/2 is not a recommended method.
Note: Suggestions regarding the selection of a 95% UCL are provided to help the user to select the most appropriate 95% UCL.
These recommendations are based upon the results of the simulation studies summarized in Singh, Maichle, and Lee (2006).
95% Adjusted Gamma UCL 1.012
95% Gamma Approximate UCL 1.011
Nu star 126 Potential UCLs to Use
AppChi2 101.1 95% KM (Chebyshev) UCL 0.356
Theta star 3.589
k star 0.226 99% KM (Chebyshev) UCL 0.673
SD 0.974 97.5% KM (Chebyshev) UCL 0.463
Median 0.931 95% KM (Chebyshev) UCL 0.356
Mean 0.811 95% KM (Percentile Bootstrap) UCL 0.205
Maximum 12 95% KM (BCA) UCL 0.227
Minimum 1E-12 95% KM (bootstrap t) UCL 0.826
Page 4 of 42
ON-SITE SOILS (0-10 FEET BGS)
Assuming Gamma Distribution 99% Chebyshev(Mean, Sd) UCL 471.9
95% Approximate Gamma UCL 230.4
95% Chebyshev(Mean, Sd) UCL 255.5Data appear Gamma Distributed at 5% Significance Level
97.5% Chebyshev(Mean, Sd) UCL 328.5
95% BCA Bootstrap UCL 169
95% Percentile Bootstrap UCL 152.6Kolmogorov-Smirnov Test Statistic 0.24
Kolmogorov-Smirnov 5% Critical Value 0.304
Anderson-Darling 5% Critical Value 0.743 95% Hall's Bootstrap UCL 609.1
Anderson-Darling Test Statistic 0.371 95% Bootstrap-t UCL 390.3
95% Standard Bootstrap UCL 146
95% Jackknife UCL 160.2Adjusted Chi Square Value 2.661
Adjusted Level of Significance 0.0195 95% CLT UCL 150.5
nu star 9.282
Nonparametric StatisticsApproximate Chi Square Value (.05) 3.498
MLE of Mean 86.83
MLE of Standard Deviation 114
k star (bias corrected) 0.58 Data appear Gamma Distributed at 5% Significance Level
Theta Star 149.7
Gamma Distribution Test Data Distribution
95% Modified-t UCL (Johnson-1978) 163.8 99% Chebyshev (MVUE) UCL 520
95% Chebyshev (MVUE) UCL 277.3 95% UCLs (Adjusted for Skewness)
95% Adjusted-CLT UCL (Chen-1995) 174.1 97.5% Chebyshev (MVUE) UCL 359.2
Assuming Normal Distribution Assuming Lognormal Distribution
95% Student's-t UCL 160.2 95% H-UCL 1038
0.752
Data not Normal at 5% Significance Level Data appear Lognormal at 5% Significance Level
Shapiro Wilk Critical Value 0.818 Shapiro Wilk Critical Value 0.818
Warning: There are only 8 Values in this data
Note: It should be noted that even though bootstrap methods may be performed on this data set,
Skewness 1.612
Coefficient of Variation 1.261
1.374
SD 109.5
Maximum of Log Data
Median 47.5 SD of log Data
Mean 86.83 Mean of log Data 3.717
General Statistics
Number of Valid Observations 8 Number of Distinct Observations 8
For additional insight, the user may want to consult a statistician.
Chemical (ammonia (as n))
Note: DL/2 is not a recommended method.
Note: Suggestions regarding the selection of a 95% UCL are provided to help the user to select the most appropriate 95% UCL.
These recommendations are based upon the results of the simulation studies summarized in Singh, Maichle, and Lee (2006).
95% Adjusted Gamma UCL 5217
95% Gamma Approximate UCL 5206
Nu star 41.57 Potential UCLs to Use
AppChi2 27.79 97.5% KM (Chebyshev) UCL 118.1
Theta star 46715
k star 0.0745 99% KM (Chebyshev) UCL 175.8
SD 7724 97.5% KM (Chebyshev) UCL 118.1
Median 11 95% KM (Chebyshev) UCL 88.7
Mean 3480 95% KM (Percentile Bootstrap) UCL 50.7
Maximum 53573 95% KM (BCA) UCL 50.49
Minimum 1E-12 95% KM (bootstrap t) UCL 1034
Gamma ROS Statistics using Extrapolated Data 95% KM (jackknife) UCL 46.37
Shapiro Wilk Test Statistic 0.959
the resulting calculations may not be reliable enough to draw conclusions
The literature suggests to use bootstrap methods on data sets having more than 10-15 observations.
Relevant UCL Statistics
Normal Distribution Test Lognormal Distribution Test
Shapiro Wilk Test Statistic
5.737
Raw Statistics Log-transformed Statistics
Minimum 5.6 Minimum of Log Data 1.723
Maximum 310
Page 5 of 42
ON-SITE SOILS (0-10 FEET BGS)
Nu star 117.6 Potential UCLs to Use
Theta star 224
k star 0.211 99% KM (Chebyshev) UCL 95.44
97.5% KM (Chebyshev) UCL 63.3
95% KM (Chebyshev) UCL 46.94Median 54.13
SD 143.6
Mean 47.2 95% KM (Percentile Bootstrap) UCL 26.34
Maximum 2400 95% KM (BCA) UCL 26.53
95% KM (bootstrap t) UCL 735.1
95% KM (jackknife) UCL 23.31Gamma ROS Statistics using Extrapolated Data
Minimum 1E-12
SE of Mean 8.675Data not Gamma Distributed at 5% Significance Level
Assuming Gamma Distribution 95% KM (z) UCL 23.4
95% KM (t) UCL 23.44
5% K-S Critical Value 0.141 SD 143.4
K-S Test Statistic 0.925 Mean 9.128
A-D Test Statistic 7.719 Nonparametric Statistics
5% A-D Critical Value 0.925 Kaplan-Meier (KM) Method
nu star 17.26
k star (bias corrected) 0.176 Data do not follow a Discernable Distribution (0.05)
Theta Star 294.6
Gamma Distribution Test with Detected Values Only Data Distribution Test with Detected Values Only
95% BCA Bootstrap UCL 35.13
95% t UCL 23.31
95% Percentile Bootstrap UCL 26.24
SD in Log Scale 4.812
SD in Original Scale 143.7
SD 2.232SD 146.6
Mean -3.336Mean 11.03
Assuming Normal Distribution Assuming Lognormal Distribution
DL/2 Substitution MethodDL/2 Substitution Method
Data not Normal at 5% Significance Level Data not Lognormal at 5% Significance Level
5% Shapiro Wilk Critical Value 0.947 5% Shapiro Wilk Critical Value 0.947
Shapiro Wilk Test Statistic 0.153 Shapiro Wilk Test Statistic 0.943
UCL Statistics
Observations < Largest ND are treated as NDs Single DL Non-Detect Percentage
Normal Distribution Test with Detected Values Only Lognormal Distribution Test with Detected Values Only
Maximum Non-Detect 1000 Maximum Non-Detect 6.908
SD of Detected 342.5 SD of Detected 2.475
Raw Statistics Log-transformed Statistics
Percent Non-Detects 82.44%
Number of Valid Data 279 Number of Detected Data 49
Chemical (anthracene)
General Statistics
Note: Suggestions regarding the selection of a 95% UCL are provided to help the user to select the most appropriate 95% UCL.
These recommendations are based upon the results of the simulation studies summarized in Singh, Singh, and Iaci (2002)
and Singh and Singh (2003). For additional insight, the user may want to consult a statistician.
Use 95% Approximate Gamma UCL 230.4Potential UCL to Use
95% Adjusted Gamma UCL 302.8
Mean in Original Scale 9.113
MLE method failed to converge properly
Maximum Likelihood Estimate(MLE) Method N/A Log ROS Method
Mean in Log Scale -7.678
95% DL/2 (t) UCL 25.52 95% H-Stat (DL/2) UCL 0.676
99.64%
Note: Data have multiple DLs - Use of KM Method is recommended
For all methods (except KM, DL/2, and ROS Methods),
Number treated as Non-Detect 278
Number treated as Detected 1
Minimum Non-Detect 0.01 Minimum Non-Detect -4.605
Mean of Detected -0.398
Maximum Detected 2400 Maximum Detected 7.783
Mean of Detected 51.88
Minimum Detected 0.011 Minimum Detected -4.51
Number of Distinct Detected Data 41 Number of Non-Detect Data 230
Page 6 of 42
ON-SITE SOILS (0-10 FEET BGS)
Theta star 31.98
k star 0.142 99% KM (Chebyshev) UCL 3.596
97.5% KM (Chebyshev) UCL 2.655
95% KM (Chebyshev) UCL 2.175Median 4.59
SD 4.624
Mean 4.556 95% KM (Percentile Bootstrap) UCL 1.654
Maximum 49.6 95% KM (BCA) UCL 1.88
95% KM (bootstrap t) UCL 1.886
95% KM (jackknife) UCL 1.396Gamma ROS Statistics using Extrapolated Data
Minimum 1E-12
SE of Mean 0.254Data not Gamma Distributed at 5% Significance Level
Assuming Gamma Distribution 95% KM (z) UCL 1.486
95% KM (t) UCL 1.487
5% K-S Critical Value 0.208 SD 3.856
K-S Test Statistic 0.791 Mean 1.067
A-D Test Statistic 1.726 Nonparametric Statistics
5% A-D Critical Value 0.791 Kaplan-Meier (KM) Method
nu star 21.38
k star (bias corrected) 0.563 Data do not follow a Discernable Distribution (0.05)
Theta Star 12.95
Gamma Distribution Test with Detected Values Only Data Distribution Test with Detected Values Only
95% BCA Bootstrap UCL 1.256
95% t UCL 1.034
95% Percentile Bootstrap UCL 1.101
SD in Log Scale 3.212
SD in Original Scale 3.929
SD 0.648SD 3.886
Mean -0.832Mean 0.913
Assuming Normal Distribution Assuming Lognormal Distribution
DL/2 Substitution MethodDL/2 Substitution Method
Data not Normal at 5% Significance Level Data not Lognormal at 5% Significance Level
5% Shapiro Wilk Critical Value 0.901 5% Shapiro Wilk Critical Value 0.901
Shapiro Wilk Test Statistic 0.592 Shapiro Wilk Test Statistic 0.881
UCL Statistics
Observations < Largest ND are treated as NDs Single DL Non-Detect Percentage
Normal Distribution Test with Detected Values Only Lognormal Distribution Test with Detected Values Only
Maximum Non-Detect 0.75 Maximum Non-Detect -0.288
SD of Detected 12.51 SD of Detected 1.322
Raw Statistics Log-transformed Statistics
Percent Non-Detects 92.18%
General Statistics
Number of Valid Data 243 Number of Detected Data 19
For additional insight, the user may want to consult a statistician.
Chemical (antimony)
Note: DL/2 is not a recommended method.
Note: Suggestions regarding the selection of a 95% UCL are provided to help the user to select the most appropriate 95% UCL.
These recommendations are based upon the results of the simulation studies summarized in Singh, Maichle, and Lee (2006).
95% Adjusted Gamma UCL 59.4
95% Gamma Approximate UCL 59.33
AppChi2 93.56 97.5% KM (Chebyshev) UCL 63.3
Mean in Original Scale 0.618
MLE yields a negative mean
Maximum Likelihood Estimate(MLE) Method N/A Log ROS Method
Mean in Log Scale -4.937
95% DL/2 (t) UCL 1.325 95% H-Stat (DL/2) UCL 0.581
92.59%
Note: Data have multiple DLs - Use of KM Method is recommended
For all methods (except KM, DL/2, and ROS Methods),
Number treated as Non-Detect 225
Number treated as Detected 18
Minimum Non-Detect 0.5 Minimum Non-Detect -0.693
Mean of Detected 1.006
Maximum Detected 49.6 Maximum Detected 3.904
Mean of Detected 7.286
Minimum Detected 0.54 Minimum Detected -0.616
Number of Distinct Detected Data 19 Number of Non-Detect Data 224
Page 7 of 42
ON-SITE SOILS (0-10 FEET BGS)
Theta star 5.398
k star 0.493 99% KM (Chebyshev) UCL 3.774
95% KM (Chebyshev) UCL 3.167
SD 1.735 97.5% KM (Chebyshev) UCL 3.372
Median 2.31
95% KM (BCA) UCL 2.869
Mean 2.662 95% KM (Percentile Bootstrap) UCL 2.874
Maximum 12
Minimum 1E-12 95% KM (bootstrap t) UCL 2.889
95% KM (z) UCL 2.873Assuming Gamma Distribution
Gamma ROS Statistics using Extrapolated Data 95% KM (jackknife) UCL 2.873
SE of Mean 0.108Data not Gamma Distributed at 5% Significance Level
95% KM (t) UCL 2.874
5% K-S Critical Value 0.0602 SD 1.688
K-S Test Statistic 0.759 Mean 2.694
A-D Test Statistic 1.315 Nonparametric Statistics
5% A-D Critical Value 0.759 Kaplan-Meier (KM) Method
nu star 1608
k star (bias corrected) 3.45 Data appear Lognormal at 5% Significance Level
Theta Star 0.805
Gamma Distribution Test with Detected Values Only Data Distribution Test with Detected Values Only
95% BCA Bootstrap UCL 2.894
95% t UCL 2.868
95% Percentile Bootstrap UCL 2.871
SD in Original Scale 1.698
95% MLE (t) UCL 2.841 Mean in Original Scale 2.688
Mean 2.656
95% MLE (Tiku) UCL 2.835
SD 1.747 SD in Log Scale 0.592
Maximum Likelihood Estimate(MLE) Method Log ROS Method
SD 1.712 SD 0.645
Data not Normal at 5% Significance Level Data appear Lognormal at 5% Significance Level
5% Lilliefors Critical Value 0.058 5% Lilliefors Critical Value 0.058
Lilliefors Test Statistic 0.132 Lilliefors Test Statistic 0.0372
UCL Statistics
Normal Distribution Test with Detected Values Only Lognormal Distribution Test with Detected Values Only
Maximum Non-Detect 0.75 Maximum Non-Detect -0.288
SD of Detected 1.679 SD of Detected 0.541
Raw Statistics Log-transformed Statistics
Percent Non-Detects 4.12%
General Statistics
Number of Valid Data 243 Number of Detected Data 233
For additional insight, the user may want to consult a statistician.
Chemical (arsenic)
Note: DL/2 is not a recommended method.
Note: Suggestions regarding the selection of a 95% UCL are provided to help the user to select the most appropriate 95% UCL.
These recommendations are based upon the results of the simulation studies summarized in Singh, Maichle, and Lee (2006).
95% Adjusted Gamma UCL 6.186
Nu star 69.24 Potential UCLs to Use
95% Gamma Approximate UCL 6.175
AppChi2 51.09 95% KM (BCA) UCL 1.88
Nu star 239.6 Potential UCLs to Use
AppChi2 204.8 95% KM (BCA) UCL 2.869
Mean in Log Scale 0.817
95% DL/2 (t) UCL 2.859 95% H-Stat (DL/2) UCL 2.949
Mean 0.795
Assuming Normal Distribution Assuming Lognormal Distribution
DL/2 Substitution Method DL/2 Substitution Method
Mean 2.677
Minimum Non-Detect 0.75 Minimum Non-Detect -0.288
Mean of Detected 0.871
Maximum Detected 12 Maximum Detected 2.485
Mean of Detected 2.776
Minimum Detected 0.795 Minimum Detected -0.229
Number of Distinct Detected Data 182 Number of Non-Detect Data 10
Page 8 of 42
ON-SITE SOILS (0-10 FEET BGS)
General Statistics
Number of Valid Data 279 Number of Detected Data 56
Chemical (benzene)
Note: Suggestions regarding the selection of a 95% UCL are provided to help the user to select the most appropriate 95% UCL.
These recommendations are based upon the results of the simulation studies summarized in Singh, Singh, and Iaci (2002)
and Singh and Singh (2003). For additional insight, the user may want to consult a statistician.
Use 95% Student's-t UCL 101.1Potential UCL to Use
or 95% Modified-t UCL 101.2
95% Adjusted Gamma UCL 100.9
95% Approximate Gamma UCL 100.9
99% Chebyshev(Mean, Sd) UCL 121.4Assuming Gamma Distribution
95% Chebyshev(Mean, Sd) UCL 107.7Data not Gamma Distributed at 5% Significance Level
97.5% Chebyshev(Mean, Sd) UCL 112.3
Kolmogorov-Smirnov 5% Critical Value 0.0587 95% BCA Bootstrap UCL 101.5
Kolmogorov-Smirnov Test Statistic 0.085 95% Percentile Bootstrap UCL 101.3
Anderson-Darling 5% Critical Value 0.754 95% Hall's Bootstrap UCL 102
Anderson-Darling Test Statistic 2.582 95% Bootstrap-t UCL 101.8
95% Standard Bootstrap UCL 101.1
Adjusted Chi Square Value 3602 95% Jackknife UCL 101.1
Adjusted Level of Significance 0.049 95% CLT UCL 101.1
nu star 3744
Approximate Chi Square Value (.05) 3603 Nonparametric Statistics
MLE of Mean 97.08
MLE of Standard Deviation 34.97
Data do not follow a Discernable Distribution (0.05)k star (bias corrected) 7.704
Theta Star 12.6
Gamma Distribution Test Data Distribution
97.5% Chebyshev (MVUE) UCL 111.9
95% Modified-t UCL (Johnson-1978) 101.2 99% Chebyshev (MVUE) UCL 120.7
95% Adjusted-CLT UCL (Chen-1995) 101.6
95% Chebyshev (MVUE) UCL 107.5 95% UCLs (Adjusted for Skewness)
95% Student's-t UCL 101.1 95% H-UCL
0.0568
Assuming Normal Distribution Assuming Lognormal Distribution
Relevant UCL Statistics
Normal Distribution Test Lognormal Distribution Test
Skewness 2.963
Coefficient of Variation 0.392
SD 38.1
4.51
Median 95.5 SD of log Data 0.367
Minimum
Mean 97.08 Mean of log Data
Maximum 415 Maximum of Log Data 6.028
Chemical (barium)
General Statistics
95% Gamma Approximate UCL
These recommendations are based upon the results of the simulation studies summarized in Singh, Maichle, and Lee (2006).
For additional insight, the user may want to consult a statistician.
Note: Suggestions regarding the selection of a 95% UCL are provided to help the user to select the most appropriate 95% UCL.
Note: DL/2 is not a recommended method.
95% Adjusted Gamma UCL 3.117
Percent Non-Detects 79.93%
Number of Distinct Detected Data 44 Number of Non-Detect Data 223
101.3
Data not Normal at 5% Significance Level Data not Lognormal at 5% Significance Level
Lilliefors Test Statistic 0.134 Lilliefors Test Statistic 0.0926
Lilliefors Critical Value 0.0568 Lilliefors Critical Value
23 Minimum of Log Data 3.135
Number of Valid Observations 243 Number of Distinct Observations 176
Raw Statistics Log-transformed Statistics
3.115
Page 9 of 42
ON-SITE SOILS (0-10 FEET BGS)
Number of Non-Detect Data 143Number of Distinct Detected Data 103
Number of Detected Data 136
General Statistics
Number of Valid Data 279
For additional insight, the user may want to consult a statistician.
Chemical (benzo(a)anthracene)
Note: DL/2 is not a recommended method.
Note: Suggestions regarding the selection of a 95% UCL are provided to help the user to select the most appropriate 95% UCL.
These recommendations are based upon the results of the simulation studies summarized in Singh, Maichle, and Lee (2006).
95% Adjusted Gamma UCL 57.02
Nu star 123.2 Potential UCLs to Use
95% Gamma Approximate UCL 56.96
AppChi2 98.61 97.5% KM (Chebyshev) UCL 70.56
Theta star 206.3
Mean 45.57 95% KM (Percentile Bootstrap) UCL 29.04
Assuming Gamma Distribution 95% KM (z) UCL 25.72
Data not Gamma Distributed at 5% Significance Level SE of Mean 9.747
K-S Test Statistic 1.12 Mean 9.683
A-D Test Statistic 18.08 Nonparametric Statistics
Kaplan-Meier (KM) Method5% A-D Critical Value 1.12
Theta Star 498.2
nu star 10.84
Gamma Distribution Test with Detected Values Only
k star (bias corrected) 0.0968 Data do not follow a Discernable Distribution (0.05)
Data Distribution Test with Detected Values Only
95% BCA Bootstrap UCL 38.72
95% Percentile Bootstrap UCL 29.04
95% t UCL 25.65
SD in Original Scale 161.6
Mean in Original Scale 9.683
-10.56
Log ROS Method
SD in Log Scale 3.564
Maximum Likelihood Estimate(MLE) Method N/A
MLE method failed to converge properly Mean in Log Scale
95% DL/2 (t) UCL 25.68
SD 1.944
Mean -6.737Mean 9.707
SD 161.6
DL/2 Substitution Method DL/2 Substitution Method
Assuming Normal Distribution Assuming Lognormal Distribution
5% Lilliefors Critical Value 0.118
Data not Normal at 5% Significance Level Data not Lognormal at 5% Significance Level
5% Lilliefors Critical Value
Number treated as Detected 1For all methods (except KM, DL/2, and ROS Methods),
Single DL Non-Detect Percentage 99.64%
Note: Data have multiple DLs - Use of KM Method is recommended Number treated as Non-Detect 278
Minimum Non-Detect 0.00021 Minimum Non-Detect -8.468
SD of Detected 360.8 SD of Detected 2.392
Mean of Detected 48.24 Mean of Detected -5.296
Maximum Detected 2700 Maximum Detected 7.901
Minimum Detected 0.00033 Minimum Detected -8.016
Raw Statistics Log-transformed Statistics
Percent Non-Detects 51.25%
99% KM (Chebyshev) UCL 106.7
SD 160.9 97.5% KM (Chebyshev) UCL 70.56
k star 0.221
Median 49.75 95% KM (Chebyshev) UCL 52.17
95% KM (BCA) UCL 29.04
Minimum 1E-12 95% KM (bootstrap t) UCL 130939
Maximum 2700
Gamma ROS Statistics using Extrapolated Data 95% KM (jackknife) UCL 25.65
95% KM (t) UCL 25.77
5% K-S Critical Value 0.141 SD 161.4
95% H-Stat (DL/2) UCL 0.0112
0.118
UCL Statistics
Observations < Largest ND are treated as NDs
Normal Distribution Test with Detected Values Only Lognormal Distribution Test with Detected Values Only
Lilliefors Test Statistic 0.534 Lilliefors Test Statistic 0.162
Maximum Non-Detect 5 Maximum Non-Detect 1.609
Page 10 of 42
ON-SITE SOILS (0-10 FEET BGS)
Number of Non-Detect Data 131Number of Distinct Detected Data 111
Number of Detected Data 148
General Statistics
Number of Valid Data 279
For additional insight, the user may want to consult a statistician.
Chemical (benzo(a)pyrene)
Note: DL/2 is not a recommended method.
Note: Suggestions regarding the selection of a 95% UCL are provided to help the user to select the most appropriate 95% UCL.
These recommendations are based upon the results of the simulation studies summarized in Singh, Maichle, and Lee (2006).
95% Adjusted Gamma UCL 83.72
95% Gamma Approximate UCL 83.54
108
Median 0.17
AppChi2 26.23 97.5% KM (Chebyshev) UCL 108
Nu star 39.66 Potential UCLs to Use
1E-12
SD 246.6 97.5% KM (Chebyshev) UCL
Maximum 3300 95% KM (BCA) UCL 48.45
SE of Mean 13.83Data not Gamma Distributed at 5% Significance Level
95% KM (t) UCL 44.44
SD 230.2
Mean 21.61K-S Test Statistic 0.947
5% K-S Critical Value 0.0899
A-D Test Statistic 18.87 Nonparametric Statistics
5% A-D Critical Value 0.947 Kaplan-Meier (KM) Method
Theta Star 252
nu star 47.82
Gamma Distribution Test with Detected Values Only Data Distribution Test with Detected Values Only
k star (bias corrected) 0.176 Data do not follow a Discernable Distribution (0.05)
95% BCA Bootstrap UCL 61.43
95% t UCL 44.39
95% Percentile Bootstrap UCL 47.57
Mean in Original Scale 21.6
SD in Original Scale 230.6
SD in Log Scale 4.144
Mean in Log Scale -3.91
Maximum Likelihood Estimate(MLE) Method N/A Log ROS Method
95% H-Stat (DL/2) UCL 6.385
SD 2.751SD 230.6
95% DL/2 (t) UCL 44.43
Mean 21.64 Mean -2.588
5% Lilliefors Critical Value 0.076 5% Lilliefors Critical Value 0.076
UCL Statistics
Normal Distribution Test with Detected Values Only Lognormal Distribution Test with Detected Values Only
Lilliefors Test Statistic 0.471 Lilliefors Test Statistic 0.113
Single DL Non-Detect Percentage 95.34%Observations < Largest ND are treated as NDs
Number treated as Non-Detect 266Note: Data have multiple DLs - Use of KM Method is recommended
Number treated as Detected 13For all methods (except KM, DL/2, and ROS Methods),
Maximum Non-Detect 2.996
Minimum Non-Detect 0.01 Minimum Non-Detect -4.605
Mean of Detected 44.31
Maximum Non-Detect 20
SD of Detected 329.4 SD of Detected 2.538
0.013 Minimum Detected -4.343
Maximum Detected 3300 Maximum Detected 8.102
777.5
k star 0.0711 99% KM (Chebyshev) UCL 159.2
Theta star
95% KM (Chebyshev) UCL 81.9
Mean 55.26 95% KM (Percentile Bootstrap) UCL 47.81
95% KM (bootstrap t) UCL 553.7
Assuming Gamma Distribution 95% KM (z) UCL 44.36
Gamma ROS Statistics using Extrapolated Data 95% KM (jackknife) UCL 44.39
Minimum
MLE yields a negative mean
DL/2 Substitution Method
Data not Normal at 5% Significance Level Data not Lognormal at 5% Significance Level
Assuming Normal Distribution Assuming Lognormal Distribution
DL/2 Substitution Method
Mean of Detected -0.508
Raw Statistics Log-transformed Statistics
Minimum Detected
Page 11 of 42
ON-SITE SOILS (0-10 FEET BGS)
279 166Number of Distinct Observations
General Statistics
Number of Valid Observations
For additional insight, the user may want to consult a statistician.
Chemical (benzo(a)pyrene equivalent)
Note: DL/2 is not a recommended method.
Note: Suggestions regarding the selection of a 95% UCL are provided to help the user to select the most appropriate 95% UCL.
These recommendations are based upon the results of the simulation studies summarized in Singh, Maichle, and Lee (2006).
95% Adjusted Gamma UCL 98.75
95% Gamma Approximate UCL 98.53
237.4
Median 0.15
AppChi2 23.84 97.5% KM (Chebyshev) UCL 237.4
Nu star 36.7 Potential UCLs to Use
1E-12
SD 512.7 97.5% KM (Chebyshev) UCL
Maximum 7600 95% KM (BCA) UCL 113.7
SE of Mean 30.61Data not Gamma Distributed at 5% Significance Level
95% KM (t) UCL 96.72
SD 509.6
Mean 46.21K-S Test Statistic 0.959
5% K-S Critical Value 0.0867
A-D Test Statistic 20.38 Nonparametric Statistics
5% A-D Critical Value 0.959 Kaplan-Meier (KM) Method
Theta Star 513.6
nu star 50.19
Gamma Distribution Test with Detected Values Only Data Distribution Test with Detected Values Only
k star (bias corrected) 0.17 Data do not follow a Discernable Distribution (0.05)
95% BCA Bootstrap UCL 129.3
95% t UCL 96.64
95% Percentile Bootstrap UCL 101.7
Mean in Original Scale 46.2
SD in Original Scale 510.5
SD in Log Scale 4.196
Mean in Log Scale -3.181
Maximum Likelihood Estimate(MLE) Method N/A Log ROS Method
95% H-Stat (DL/2) UCL 22.76
SD 3.01SD 510.5
95% DL/2 (t) UCL 96.64
Mean 46.2 Mean -2.183
5% Lilliefors Critical Value 0.0728 5% Lilliefors Critical Value 0.0728
UCL Statistics
Normal Distribution Test with Detected Values Only Lognormal Distribution Test with Detected Values Only
Lilliefors Test Statistic 0.482 Lilliefors Test Statistic 0.101
Single DL Non-Detect Percentage 68.46%Observations < Largest ND are treated as NDs
Number treated as Non-Detect 191Note: Data have multiple DLs - Use of KM Method is recommended
Number treated as Detected 88For all methods (except KM, DL/2, and ROS Methods),
Maximum Non-Detect -1.109
Minimum Non-Detect 0.01 Minimum Non-Detect -4.605
Mean of Detected 87.09
Maximum Non-Detect 0.33
SD of Detected 699.5 SD of Detected 2.62
0.014 Minimum Detected -4.269
Maximum Detected 7600 Maximum Detected 8.936
972.8
k star 0.0658 99% KM (Chebyshev) UCL 350.8
Theta star
95% KM (Chebyshev) UCL 179.6
Mean 63.99 95% KM (Percentile Bootstrap) UCL 101.1
95% KM (bootstrap t) UCL 1463
Assuming Gamma Distribution 95% KM (z) UCL 96.56
Gamma ROS Statistics using Extrapolated Data 95% KM (jackknife) UCL 96.64
Minimum
MLE yields a negative mean
DL/2 Substitution Method
Data not Normal at 5% Significance Level Data not Lognormal at 5% Significance Level
Assuming Normal Distribution Assuming Lognormal Distribution
DL/2 Substitution Method
Mean of Detected -0.0171
Percent Non-Detects 46.95%
Raw Statistics Log-transformed Statistics
Minimum Detected
Page 12 of 42
ON-SITE SOILS (0-10 FEET BGS)
0.00875 -4.739
9824 9.193
59.99 -1.74
0.0555 2.91
658.7
10.98
13.33
0.464 0.223
0.053 0.053
125.1 25.13
29
158.5 36.7
130.3 51.83
0.135
444.9
59.99
163.4
75.24
56.26
0.0491 124.9
56.18 125.1
125.6
49.67 1870
1.08 818.5
0.286 131.5
0.0639 167
231.9
306.3
452.4
80.22
80.34
231.9
UCL Statistics
Normal Distribution Test with Detected Values Only Lognormal Distribution Test with Detected Values Only
Single DL Non-Detect Percentage 70.61%Observations < Largest ND are treated as NDs
Number treated as Non-Detect 197Note: Data have multiple DLs - Use of KM Method is recommended
Number treated as Detected 82For all methods (except KM, DL/2, and ROS Methods),
Maximum Non-Detect 0.33 Maximum Non-Detect -1.109
Mean of Detected 54.29 Mean of Detected -0.179
Maximum Detected 4600 Maximum Detected 8.434
Minimum Detected 0.012 Minimum Detected -4.423
Raw Statistics Log-transformed Statistics
General Statistics
Percent Non-Detects 46.24%
Number of Distinct Detected Data 118
These recommendations are based upon the results of the simulation studies summarized in Singh, Singh, and Iaci (2002)
and Singh and Singh (2003). For additional insight, the user may want to consult a statistician.
Chemical (benzo(b)fluoranthene)
Use 95% Chebyshev (Mean, Sd) UCLPotential UCL to Use
Note: Suggestions regarding the selection of a 95% UCL are provided to help the user to select the most appropriate 95% UCL.
95% Adjusted Gamma UCL
99% Chebyshev(Mean, Sd) UCLAssuming Gamma Distribution
95% Approximate Gamma UCL
95% Chebyshev(Mean, Sd) UCLData not Gamma Distributed at 5% Significance Level
97.5% Chebyshev(Mean, Sd) UCL
95% Percentile Bootstrap UCL
Kolmogorov-Smirnov 5% Critical Value 95% BCA Bootstrap UCL
Kolmogorov-Smirnov Test Statistic
95% Bootstrap-t UCL
Anderson-Darling 5% Critical Value 95% Hall's Bootstrap UCL
Anderson-Darling Test Statistic
95% Standard Bootstrap UCL
Adjusted Chi Square Value 95% Jackknife UCL
Adjusted Level of Significance 95% CLT UCL
nu star
Approximate Chi Square Value (.05) Nonparametric Statistics
MLE of Mean
MLE of Standard Deviation
Data do not follow a Discernable Distribution (0.05)k star (bias corrected)
Theta Star
Gamma Distribution Test Data Distribution
95% Modified-t UCL (Johnson-1978) 99% Chebyshev (MVUE) UCL
95% Chebyshev (MVUE) UCL 95% UCLs (Adjusted for Skewness)
95% Adjusted-CLT UCL (Chen-1995) 97.5% Chebyshev (MVUE) UCL
95% Student's-t UCL 95% H-UCL
Data not Normal at 5% Significance Level Data not Lognormal at 5% Significance Level
Assuming Normal Distribution Assuming Lognormal Distribution
Lilliefors Critical Value Lilliefors Critical Value
Relevant UCL Statistics
Normal Distribution Test Lognormal Distribution Test
Lilliefors Test Statistic Lilliefors Test Statistic
Skewness
SD
Maximum of Log Data
Median SD of log Data
Mean Mean of log Data
-4.605
SD of Detected 414.8 SD of Detected 2.631
Minimum Non-Detect 0.01 Minimum Non-Detect
Number of Non-Detect Data 129
Number of Valid Data 279 Number of Detected Data 150
Coefficient of Variation
Raw Statistics Log-transformed Statistics
Minimum Minimum of Log Data
Maximum
Page 13 of 42
ON-SITE SOILS (0-10 FEET BGS)
UCL Statistics
Single DL Non-Detect Percentage 64.87%Observations < Largest ND are treated as NDs
Number treated as Non-Detect 181Note: Data have multiple DLs - Use of KM Method is recommended
Number treated as Detected 98For all methods (except KM, DL/2, and ROS Methods),
Maximum Non-Detect 0.33 Maximum Non-Detect -1.109
Mean of Detected 98.08 Mean of Detected -0.0101
Maximum Detected 11000 Maximum Detected 9.306
Minimum Detected 0.011 Minimum Detected -4.51
Raw Statistics Log-transformed Statistics
General Statistics
Percent Non-Detects 40.50%
Number of Distinct Detected Data 128
For additional insight, the user may want to consult a statistician.
Chemical (benzo(g,h,i)perylene)
Note: DL/2 is not a recommended method.
Note: Suggestions regarding the selection of a 95% UCL are provided to help the user to select the most appropriate 95% UCL.
These recommendations are based upon the results of the simulation studies summarized in Singh, Maichle, and Lee (2006).
95% Adjusted Gamma UCL 58.83
95% Gamma Approximate UCL 58.7
Nu star 37.79 Potential UCLs to Use
AppChi2 24.71 97.5% KM (Chebyshev) UCL 143.4
Theta star 566.9
k star 0.0677 99% KM (Chebyshev) UCL 211.1
95% KM (Chebyshev) UCL 108.9
SD 305.8 97.5% KM (Chebyshev) UCL 143.4
Median 0.13
95% KM (BCA) UCL 68.9
Mean 38.39 95% KM (Percentile Bootstrap) UCL 61.96
Maximum 4600
Minimum 1E-12 95% KM (bootstrap t) UCL 528.9
Gamma ROS Statistics using Extrapolated Data 95% KM (jackknife) UCL 59.32
95% KM (z) UCL 59.26Assuming Gamma Distribution
95% KM (t) UCL 59.37
SE of Mean 18.28Data not Gamma Distributed at 5% Significance Level
5% K-S Critical Value 0.0857 SD 304.4
Mean 29.19
Kaplan-Meier (KM) Method5% A-D Critical Value 0.944
K-S Test Statistic 0.944
Nonparametric StatisticsA-D Test Statistic 18.19
nu star 54.05
k star (bias corrected) 0.18 Data do not follow a Discernable Distribution (0.05)
Theta Star 301.3
Gamma Distribution Test with Detected Values Only Data Distribution Test with Detected Values Only
95% Percentile Bootstrap UCL 62.23
95% BCA Bootstrap UCL 87.21
95% t UCL 59.31
SD in Original Scale 304.9
Mean in Original Scale 29.19
Mean in Log Scale -3.274MLE yields a negative mean
SD in Log Scale 4.175
Log ROS Method
SD 304.9
Maximum Likelihood Estimate(MLE) Method N/A
95% DL/2 (t) UCL 59.32 95% H-Stat (DL/2) UCL 17.98
DL/2 Substitution Method
Mean 29.19 Mean -2.229
5% Lilliefors Critical Value 0.07235% Lilliefors Critical Value 0.0723
Lilliefors Test Statistic 0.107Lilliefors Test Statistic 0.452
-4.605
SD of Detected 891.3 SD of Detected 2.724
Minimum Non-Detect 0.01 Minimum Non-Detect
Number of Non-Detect Data 113
Number of Valid Data 279 Number of Detected Data 166
SD 2.955
Data not Normal at 5% Significance Level Data not Lognormal at 5% Significance Level
Assuming Normal Distribution Assuming Lognormal Distribution
DL/2 Substitution Method
Page 14 of 42
ON-SITE SOILS (0-10 FEET BGS)
Single DL Non-Detect Percentage 93.91%Observations < Largest ND are treated as NDs
Number treated as Non-Detect 262Note: Data have multiple DLs - Use of KM Method is recommended
Number treated as Detected 17For all methods (except KM, DL/2, and ROS Methods),
Maximum Non-Detect 20 Maximum Non-Detect 2.996
Mean of Detected 58.17 Mean of Detected -0.338
Maximum Detected 4700 Maximum Detected 8.455
Minimum Detected 0.02 Minimum Detected -3.912
Raw Statistics Log-transformed Statistics
General Statistics
Percent Non-Detects 51.25%
Number of Distinct Detected Data 103
For additional insight, the user may want to consult a statistician.
Chemical (benzo(k)fluoranthene)
Note: DL/2 is not a recommended method.
Note: Suggestions regarding the selection of a 95% UCL are provided to help the user to select the most appropriate 95% UCL.
These recommendations are based upon the results of the simulation studies summarized in Singh, Maichle, and Lee (2006).
95% Adjusted Gamma UCL 92.43
95% Gamma Approximate UCL 92.22
Nu star 34.07 Potential UCLs to Use
AppChi2 21.72 97.5% KM (Chebyshev) UCL 316
Theta star 962.8
k star 0.0611 99% KM (Chebyshev) UCL 468.9
95% KM (Chebyshev) UCL 238.2
SD 688.3 97.5% KM (Chebyshev) UCL 316
Median 0.082
95% KM (BCA) UCL 137
Mean 58.79 95% KM (Percentile Bootstrap) UCL 136.5
Maximum 11000
Minimum 1E-12 95% KM (bootstrap t) UCL 1960
Gamma ROS Statistics using Extrapolated Data 95% KM (jackknife) UCL 126.4
95% KM (z) UCL 126.2Assuming Gamma Distribution
95% KM (t) UCL 126.5
SE of Mean 41.26Data not Gamma Distributed at 5% Significance Level
5% K-S Critical Value 0.0818 SD 687.1
Mean 58.36
Kaplan-Meier (KM) Method5% A-D Critical Value 0.97
K-S Test Statistic 0.97
Nonparametric StatisticsA-D Test Statistic 21.68
nu star 55.1
k star (bias corrected) 0.166 Data do not follow a Discernable Distribution (0.05)
Theta Star 591
Gamma Distribution Test with Detected Values Only Data Distribution Test with Detected Values Only
95% Percentile Bootstrap UCL 135.6
95% BCA Bootstrap UCL 204.5
95% t UCL 126.4
SD in Original Scale 688.4
Mean in Original Scale 58.36
Mean in Log Scale -2.708MLE yields a negative mean
SD in Log Scale 4.137
Log ROS Method
SD 688.4
Maximum Likelihood Estimate(MLE) Method N/A
95% DL/2 (t) UCL 126.4 95% H-Stat (DL/2) UCL 43.07
DL/2 Substitution Method
Mean 58.36 Mean -1.873
5% Lilliefors Critical Value 0.06885% Lilliefors Critical Value 0.0688
Normal Distribution Test with Detected Values Only
Lilliefors Test Statistic 0.0849
Lognormal Distribution Test with Detected Values Only
Lilliefors Test Statistic 0.477
-4.605
SD of Detected 443.5 SD of Detected 2.522
Minimum Non-Detect 0.01 Minimum Non-Detect
Number of Non-Detect Data 143
Number of Valid Data 279 Number of Detected Data 136
SD 3.102
Data not Normal at 5% Significance Level Data not Lognormal at 5% Significance Level
Assuming Normal Distribution Assuming Lognormal Distribution
DL/2 Substitution Method
Page 15 of 42
ON-SITE SOILS (0-10 FEET BGS)
Single DL Non-Detect Percentage 72.43%Observations < Largest ND are treated as NDs
Number treated as Non-Detect 176Note: Data have multiple DLs - Use of KM Method is recommended
Number treated as Detected 67For all methods (except KM, DL/2, and ROS Methods),
Maximum Non-Detect 0.25 Maximum Non-Detect -1.386
Mean of Detected 0.303 Mean of Detected -1.24
Maximum Detected 0.709 Maximum Detected -0.344
Minimum Detected 0.105 Minimum Detected -2.254
Raw Statistics Log-transformed Statistics
General Statistics
Percent Non-Detects 66.67%
Number of Distinct Detected Data 69
For additional insight, the user may want to consult a statistician.
Chemical (beryllium)
Note: DL/2 is not a recommended method.
Note: Suggestions regarding the selection of a 95% UCL are provided to help the user to select the most appropriate 95% UCL.
These recommendations are based upon the results of the simulation studies summarized in Singh, Maichle, and Lee (2006).
95% Adjusted Gamma UCL 113.1
95% Gamma Approximate UCL 112.8
Nu star 38.69 Potential UCLs to Use
AppChi2 25.44 97.5% KM (Chebyshev) UCL 144.6
Theta star 1070
k star 0.0693 99% KM (Chebyshev) UCL 213.6
95% KM (Chebyshev) UCL 109.5
SD 331.5 97.5% KM (Chebyshev) UCL 144.6
Median 0.17
95% KM (BCA) UCL 62.59
Mean 74.18 95% KM (Percentile Bootstrap) UCL 62.81
Maximum 4700
Minimum 1E-12 95% KM (bootstrap t) UCL 540.5
Gamma ROS Statistics using Extrapolated Data 95% KM (jackknife) UCL 59.04
95% KM (z) UCL 58.99Assuming Gamma Distribution
95% KM (t) UCL 59.1
SE of Mean 18.62Data not Gamma Distributed at 5% Significance Level
5% K-S Critical Value 0.09 SD 309.9
Mean 28.37
Kaplan-Meier (KM) Method5% A-D Critical Value 0.952
K-S Test Statistic 0.952
Nonparametric StatisticsA-D Test Statistic 19.88
nu star 46.88
k star (bias corrected) 0.172 Data do not follow a Discernable Distribution (0.05)
Theta Star 337.5
Gamma Distribution Test with Detected Values Only Data Distribution Test with Detected Values Only
95% Percentile Bootstrap UCL 62.17
95% BCA Bootstrap UCL 84.53
95% t UCL 59.03
SD in Original Scale 310.4
Mean in Original Scale 28.36
Mean in Log Scale -3.731MLE yields a negative mean
SD in Log Scale 4.131
Log ROS Method
SD 310.4
Maximum Likelihood Estimate(MLE) Method N/A
95% DL/2 (t) UCL 59.08 95% H-Stat (DL/2) UCL 8.675
DL/2 Substitution Method
Mean 28.41 Mean -2.491
5% Lilliefors Critical Value 0.0765% Lilliefors Critical Value 0.076
UCL Statistics
Normal Distribution Test with Detected Values Only
Lilliefors Test Statistic 0.117
Lognormal Distribution Test with Detected Values Only
Lilliefors Test Statistic 0.47
-1.609
SD of Detected 0.0977 SD of Detected 0.306
Minimum Non-Detect 0.2 Minimum Non-Detect
Number of Non-Detect Data 162
Number of Valid Data 243 Number of Detected Data 81
SD 2.815
Data not Normal at 5% Significance Level Data not Lognormal at 5% Significance Level
Assuming Normal Distribution Assuming Lognormal Distribution
DL/2 Substitution Method
Page 16 of 42
ON-SITE SOILS (0-10 FEET BGS)
Warning: There are only 9 Detected Values in this data
Maximum Non-Detect 0.5 Maximum Non-Detect -0.693
Mean of Detected 1.045 Mean of Detected -0.31
Maximum Detected 3.35 Maximum Detected 1.209
Minimum Detected 0.173 Minimum Detected -1.754
Raw Statistics Log-transformed Statistics
General Statistics
Percent Non-Detects 96.30%
Number of Distinct Detected Data 9
For additional insight, the user may want to consult a statistician.
Chemical (cadmium)
Note: DL/2 is not a recommended method.
Note: Suggestions regarding the selection of a 95% UCL are provided to help the user to select the most appropriate 95% UCL.
These recommendations are based upon the results of the simulation studies summarized in Singh, Maichle, and Lee (2006).
95% Adjusted Gamma UCL 0.318
95% Gamma Approximate UCL 0.318 95% KM (% Bootstrap) UCL 0.232
Nu star 14429 Potential UCLs to Use
AppChi2 14151 95% KM (t) UCL 0.232
Theta star 0.0105
k star 29.69 99% KM (Chebyshev) UCL 0.299
95% KM (Chebyshev) UCL 0.254
SD 0.0582 97.5% KM (Chebyshev) UCL 0.269
Median 0.316
95% KM (BCA) UCL 0.231
Mean 0.312 95% KM (Percentile Bootstrap) UCL 0.232
Maximum 0.709
Minimum 0.105 95% KM (bootstrap t) UCL 0.232
Gamma ROS Statistics using Extrapolated Data 95% KM (jackknife) UCL 0.233
95% KM (z) UCL 0.232Assuming Gamma Distribution
95% KM (t) UCL 0.232
SE of Mean 0.00805Data not Gamma Distributed at 5% Significance Level
5% K-S Critical Value 0.0991 SD 0.0863
Mean 0.219
Kaplan-Meier (KM) Method5% A-D Critical Value 0.751
K-S Test Statistic 0.751
Nonparametric StatisticsA-D Test Statistic 1.435
nu star 1704
k star (bias corrected) 10.52 Data do not follow a Discernable Distribution (0.05)
Theta Star 0.0288
Gamma Distribution Test with Detected Values Only Data Distribution Test with Detected Values Only
95% BCA Bootstrap UCL 0.226
95% Percentile Bootstrap UCL 0.224
95% t UCL 0.224
95% MLE (Tiku) UCL 0.188 SD in Original Scale 0.0914
95% MLE (t) UCL 0.174 Mean in Original Scale 0.215
SD 0.144 SD in Log Scale 0.392
Mean 0.159 Mean in Log Scale -1.617
Log ROS Method
SD 0.102
Maximum Likelihood Estimate(MLE) Method
95% DL/2 (t) UCL 0.194 95% H-Stat (DL/2) UCL 0.19
DL/2 Substitution Method
Mean 0.184 Mean -1.807
5% Lilliefors Critical Value 0.09845% Lilliefors Critical Value 0.0984
UCL Statistics
Normal Distribution Test with Detected Values Only
Lilliefors Test Statistic 0.151
Lognormal Distribution Test with Detected Values Only
Lilliefors Test Statistic 0.154
-0.693
SD of Detected 1.041 SD of Detected 0.865
Minimum Non-Detect 0.5 Minimum Non-Detect
Number of Non-Detect Data 234
Number of Valid Data 243 Number of Detected Data 9
SD 0.441
Data not Normal at 5% Significance Level Data not Lognormal at 5% Significance Level
Assuming Normal Distribution Assuming Lognormal Distribution
DL/2 Substitution Method
Page 17 of 42
ON-SITE SOILS (0-10 FEET BGS)
General Statistics
Number of Valid Observations 243 Number of Distinct Observations 197
For additional insight, the user may want to consult a statistician.
Chemical (chromium)
Note: DL/2 is not a recommended method.
Note: Suggestions regarding the selection of a 95% UCL are provided to help the user to select the most appropriate 95% UCL.
These recommendations are based upon the results of the simulation studies summarized in Singh, Maichle, and Lee (2006).
95% Adjusted Gamma UCL 0.605
95% Gamma Approximate UCL 0.604 95% KM (% Bootstrap) UCL 0.574
AppChi2 40.06 95% KM (t) UCL 0.233
Nu star 56.3 Potential UCLs to Use
Theta star 3.709
97.5% KM (Chebyshev) UCL 0.312
k star 0.116 99% KM (Chebyshev) UCL 0.375
SD 0.432
Median 0.362 95% KM (Chebyshev) UCL 0.28
Mean 0.43 95% KM (Percentile Bootstrap) UCL 0.574
95% KM (BCA) UCL 0.584
95% KM (bootstrap t) UCL 0.273Minimum 1E-12
Maximum 3.35
Gamma ROS Statistics using Extrapolated Data 95% KM (jackknife) UCL 0.411
95% KM (t) UCL
95% KM (z) UCL 0.233Assuming Gamma Distribution
K-S Test Statistic 0.734 Mean 0.205
A-D Test Statistic 0.82 Nonparametric Statistics
5% A-D Critical Value 0.734 Kaplan-Meier (KM) Method
Theta Star 0.938
nu star 20.05
Gamma Distribution Test with Detected Values Only
k star (bias corrected) 1.114 Data appear Lognormal at 5% Significance Level
Data Distribution Test with Detected Values Only
95% BCA Bootstrap UCL 0.233
95% Percentile Bootstrap UCL 0.222
95% t UCL 0.222
SD in Original Scale 0.283
SD in Log Scale 0.902
Mean in Original Scale 0.193
MLE yields a negative mean Mean in Log Scale -2.083
Maximum Likelihood Estimate(MLE) Method N/A Log ROS Method
0.257
-1.346
Assuming Normal Distribution Assuming Lognormal Distribution
95% DL/2 (t) UCL 0.305 95% H-Stat (DL/2) UCL 0.277
SD 0.242 SD
0.713
Mean 0.279 Mean
Note: It should be noted that even though bootstrap may be performed on this data set
the resulting calculations may not be reliable enough to draw conclusions
Maximum of Log Data 4.069
Raw Statistics Log-transformed Statistics
Minimum 1.54 Minimum of Log Data 0.432
Maximum 58.5
0.233
5% K-S Critical Value 0.284 SD 0.251
Data not Gamma Distributed at 5% Significance Level SE of Mean 0.017
DL/2 Substitution Method DL/2 Substitution Method
5% Shapiro Wilk Critical Value 0.829 5% Shapiro Wilk Critical Value 0.829
Data not Normal at 5% Significance Level Data appear Lognormal at 5% Significance Level
Shapiro Wilk Test Statistic 0.895
It is recommended to have 10-15 or more distinct observations for accurate and meaningful results.
UCL Statistics
Normal Distribution Test with Detected Values Only Lognormal Distribution Test with Detected Values Only
Shapiro Wilk Test Statistic
Page 18 of 42
ON-SITE SOILS (0-10 FEET BGS)
Data not Normal at 5% Significance Level Data not Lognormal at 5% Significance Level
Normal Distribution Test with Detected Values Only Lognormal Distribution Test with Detected Values Only
Lilliefors Test Statistic 0.474 Lilliefors Test Statistic
Number treated as Non-Detect 202
Maximum Non-Detect 0.33 Maximum Non-Detect -1.109
Minimum Non-Detect 0.01 Minimum Non-Detect -4.605
SD of Detected 422.7 SD of Detected 2.598
Mean of Detected 54.53 Mean of Detected -0.397
Maximum Detected 4400 Maximum Detected 8.389
Raw Statistics Log-transformed Statistics
Minimum Detected 0.014 Minimum Detected -4.269
Percent Non-Detects 45.88%
Number of Distinct Detected Data 109 Number of Non-Detect Data 128
Chemical (chrysene)
General Statistics
Number of Detected Data 151Number of Valid Data 279
These recommendations are based upon the results of the simulation studies summarized in Singh, Singh, and Iaci (2002)
and Singh and Singh (2003). For additional insight, the user may want to consult a statistician.
or 95% Modified-t UCL 9.547
Note: Suggestions regarding the selection of a 95% UCL are provided to help the user to select the most appropriate 95% UCL.
Use 95% Student's-t UCL 9.529Potential UCL to Use
95% Adjusted Gamma UCL 9.384
99% Chebyshev(Mean, Sd) UCL 12.49Assuming Gamma Distribution
95% Approximate Gamma UCL 9.381
95% Chebyshev(Mean, Sd) UCL 10.49Data not Gamma Distributed at 5% Significance Level
97.5% Chebyshev(Mean, Sd) UCL 11.17
Kolmogorov-Smirnov 5% Critical Value 0.0588 95% BCA Bootstrap UCL 9.607
Kolmogorov-Smirnov Test Statistic 0.17 95% Percentile Bootstrap UCL 9.532
Anderson-Darling 5% Critical Value 0.756 95% Hall's Bootstrap UCL 9.746
Anderson-Darling Test Statistic 10.38 95% Bootstrap-t UCL 9.75
95% Standard Bootstrap UCL 9.529
Adjusted Level of Significance 0.049 95% CLT UCL 9.527
Adjusted Chi Square Value 2295 95% Jackknife UCL 9.529
Nonparametric Statistics
nu star 2409
Approximate Chi Square Value (.05) 2295
MLE of Standard Deviation 4.016
MLE of Mean 8.941
k star (bias corrected) 4.956
99% Chebyshev (MVUE) UCL 11.24 95% Modified-t UCL (Johnson-1978) 9.547
95% Chebyshev (MVUE) UCL 9.866 95% UCLs (Adjusted for Skewness)
97.5% Chebyshev (MVUE) UCL 10.33 95% Adjusted-CLT UCL (Chen-1995) 9.644
Assuming Normal Distribution Assuming Lognormal Distribution
95% Student's-t UCL 9.529 95% H-UCL 9.228
Data not Normal at 5% Significance Level Data not Lognormal at 5% Significance Level
Lilliefors Critical Value 0.0568 Lilliefors Critical Value 0.0568
Lilliefors Test Statistic 0.226 Lilliefors Test Statistic 0.132
Relevant UCL Statistics
Normal Distribution Test Lognormal Distribution Test
Skewness 4.801
SD 5.553
Coefficient of Variation 0.621
Mean 8.941 Mean of log Data 2.088
5% Lilliefors Critical Value 0.0721 5% Lilliefors Critical Value 0.0721
0.12
Observations < Largest ND are treated as NDs
Note: Data have multiple DLs - Use of KM Method is recommended
For all methods (except KM, DL/2, and ROS Methods), Number treated as Detected 77
Single DL Non-Detect Percentage 72.40%
UCL Statistics
Data do not follow a Discernable Distribution (0.05)
Theta Star 1.804
Gamma Distribution Test Data Distribution
Median 7.64 SD of log Data 0.418
Page 19 of 42
ON-SITE SOILS (0-10 FEET BGS)
Assuming Normal Distribution Assuming Lognormal Distribution
95% Student's-t UCL 7.881 95% H-UCL 6.981
0.1
Lilliefors Critical Value 0.0568 Lilliefors Critical Value 0.0568
Skewness 13.93
Coefficient of Variation 1.272
SD 8.836
Median 6.17 SD of log Data 0.426
Mean 6.945 Mean of log Data 1.804
Maximum 139 Maximum of Log Data 4.934
Minimum 0.618 Minimum of Log Data -0.481
Number of Valid Observations 243
Raw Statistics Log-transformed Statistics
General Statistics
Number of Distinct Observations 209
For additional insight, the user may want to consult a statistician.
Chemical (cobalt)
Note: DL/2 is not a recommended method.
Note: Suggestions regarding the selection of a 95% UCL are provided to help the user to select the most appropriate 95% UCL.
These recommendations are based upon the results of the simulation studies summarized in Singh, Maichle, and Lee (2006).
95% Adjusted Gamma UCL 56.49
95% Gamma Approximate UCL 56.36
Nu star 36.95 Potential UCLs to Use
AppChi2 24.04 97.5% KM (Chebyshev) UCL 146.2
Theta star 553.6
97.5% KM (Chebyshev) UCL 146.2
k star 0.0662 99% KM (Chebyshev) UCL 215.5
SD 312.2
Median 0.085 95% KM (Chebyshev) UCL 111
Mean 36.66 95% KM (Percentile Bootstrap) UCL 62.04
Maximum 4400 95% KM (BCA) UCL 70.61
Minimum 1E-12 95% KM (bootstrap t) UCL 756.6
Gamma ROS Statistics using Extrapolated Data 95% KM (jackknife) UCL 60.31
95% KM (z) UCL 60.26Assuming Gamma Distribution
95% KM (t) UCL
K-S Test Statistic 0.956 Mean 29.52
5% A-D Critical Value 0.956 Kaplan-Meier (KM) Method
Theta Star 316.2
Nonparametric StatisticsA-D Test Statistic 20.58
Gamma Distribution Test with Detected Values Only
k star (bias corrected) 0.172 Data do not follow a Discernable Distribution (0.05)
Data Distribution Test with Detected Values Only
95% BCA Bootstrap UCL 81.38
95% Percentile Bootstrap UCL 64.43
95% t UCL 60.31
SD in Original Scale 311.7
Mean in Original Scale 29.51
4.121
Mean in Log Scale -3.431
Maximum Likelihood Estimate(MLE) Method
MLE yields a negative mean
SD in Log Scale
95% DL/2 (t) UCL 60.31 95% H-Stat (DL/2) UCL 12.03
2.869
DL/2 Substitution Method DL/2 Substitution Method
Assuming Normal Distribution Assuming Lognormal Distribution
95% UCLs (Adjusted for Skewness) 95% Chebyshev (MVUE) UCL 7.474
Data not Normal at 5% Significance Level Data not Lognormal at 5% Significance Level
Relevant UCL Statistics
Normal Distribution Test Lognormal Distribution Test
Lilliefors Test Statistic 0.32 Lilliefors Test Statistic
60.36
5% K-S Critical Value 0.0858 SD 311.1
Data not Gamma Distributed at 5% Significance Level SE of Mean 18.69
nu star 52.08
N/A Log ROS Method
Mean 29.52 Mean -2.342
SD 311.7 SD
Page 20 of 42
ON-SITE SOILS (0-10 FEET BGS)
Kolmogorov-Smirnov Test Statistic 0.219 95% Percentile Bootstrap UCL 16.03
Anderson-Darling 5% Critical Value 0.769 95% Hall's Bootstrap UCL 16.6
Anderson-Darling Test Statistic 18.37 95% Bootstrap-t UCL 16.72
95% Standard Bootstrap UCL 16.02
Adjusted Chi Square Value 779.1 95% Jackknife UCL 16.02
Adjusted Level of Significance 0.049 95% CLT UCL 16.01
Approximate Chi Square Value (.05) 779.5
nu star 846
Nonparametric Statistics
16.09
k star (bias corrected) 1.741
Theta Star 8.057
Gamma Distribution Test Data Distribution
Assuming Normal Distribution Assuming Lognormal Distribution
95% Student's-t UCL 16.02 95% H-UCL 13.79
Lilliefors Test Statistic 0.297 Lilliefors Test Statistic 0.146
Relevant UCL Statistics
Normal Distribution Test Lognormal Distribution Test
Skewness 5.343
Coefficient of Variation 1.341
SD 18.8
Median 8.81 SD of log Data 0.654
Mean 14.03 Mean of log Data 2.331
Maximum 180 Maximum of Log Data 5.193
Raw Statistics Log-transformed Statistics
Minimum 2.22 Minimum of Log Data 0.798
Chemical (copper)
Number of Valid Observations 243
General Statistics
Number of Distinct Observations 200
Note: Suggestions regarding the selection of a 95% UCL are provided to help the user to select the most appropriate 95% UCL.
These recommendations are based upon the results of the simulation studies summarized in Singh, Singh, and Iaci (2002)
and Singh and Singh (2003). For additional insight, the user may want to consult a statistician.
or 95% Modified-t UCL 7.966
Use 95% Student's-t UCL 7.881Potential UCL to Use
99% Chebyshev(Mean, Sd) UCL 12.59Assuming Gamma Distribution
95% Approximate Gamma UCL 7.336
97.5% Chebyshev(Mean, Sd) UCL 10.49
Data not Gamma Distributed at 5% Significance Level 95% Chebyshev(Mean, Sd) UCL 9.416
Kolmogorov-Smirnov 5% Critical Value 0.059 95% BCA Bootstrap UCL 8.63
Anderson-Darling 5% Critical Value 0.758 95% Hall's Bootstrap UCL 11.57
Anderson-Darling Test Statistic 4.115E+28 95% Bootstrap-t UCL 9.832
95% Standard Bootstrap UCL 7.869
Adjusted Chi Square Value 1766 95% Jackknife UCL 7.881
Approximate Chi Square Value (.05) 1767 Nonparametric Statistics
Adjusted Level of Significance 0.049 95% CLT UCL 7.878
Gamma Distribution Test Data Distribution
nu star 1866
MLE of Mean 6.945
95% Modified-t UCL (Johnson-1978) 7.966 99% Chebyshev (MVUE) UCL 8.534
MLE of Standard Deviation 10.63
Data do not follow a Discernable Distribution (0.05)
MLE of Mean 14.03
99% Chebyshev (MVUE) UCL 18.55
95% UCLs (Adjusted for Skewness) 95% Chebyshev (MVUE) UCL 15.28
95% Adjusted-CLT UCL (Chen-1995) 16.45 97.5% Chebyshev (MVUE) UCL 16.38
95% Modified-t UCL (Johnson-1978)
Lilliefors Critical Value 0.0568 Lilliefors Critical Value 0.0568
Data not Normal at 5% Significance Level Data not Lognormal at 5% Significance Level
95% Adjusted Gamma UCL 7.338
Kolmogorov-Smirnov Test Statistic 0.163 95% Percentile Bootstrap UCL 8.073
MLE of Standard Deviation 3.544
k star (bias corrected) 3.84 Data do not follow a Discernable Distribution (0.05)
Theta Star 1.809
95% Adjusted-CLT UCL (Chen-1995) 8.419 97.5% Chebyshev (MVUE) UCL 7.832
Page 21 of 42
ON-SITE SOILS (0-10 FEET BGS)
279 56
51 223
79.93%
0.02 -3.912
16 2.773
2.187 -0.893
3.588 2.116
0.01 -4.605
1000 6.908
279
0
100.00%
0.289 0.122
0.118 0.118
4.15 -3.308
42.25 2.195
8.325 0.632
N/A
-6.664
4.042
0.442
1.821
0.621
0.628
0.665
0.385
5.684
43.08
1.772
0.841
0.841 0.464
0.128 1.825
0.111
0.648
0.647
0.646
1E-12 0.705
16 0.663
1.707 0.661
Maximum 95% KM (BCA) UCL
Minimum 95% KM (bootstrap t) UCL
95% KM (z) UCLAssuming Gamma Distribution
Gamma ROS Statistics using Extrapolated Data 95% KM (jackknife) UCL
95% KM (t) UCL
Mean
SE of MeanData not Gamma Distributed at 5% Significance Level
5% K-S Critical Value SD
k star (bias corrected) Data do not follow a Discernable Distribution (0.05)
Theta Star
95% BCA Bootstrap UCL
Mean in Original Scale
SD in Log Scale
Maximum Likelihood Estimate(MLE) Method
Mean in Log ScaleMLE method failed to converge properly
Log ROS Method
95% DL/2 (t) UCL 95% H-Stat (DL/2) UCL
SD SD
Mean Mean
DL/2 Substitution Method DL/2 Substitution Method
Assuming Normal Distribution Assuming Lognormal Distribution
5% Lilliefors Critical Value
Data not Normal at 5% Significance Level Data not Lognormal at 5% Significance Level
5% Lilliefors Critical Value
Number treated as Non-DetectNote: Data have multiple DLs - Use of KM Method is recommended
Single DL Non-Detect Percentage
For all methods (except KM, DL/2, and ROS Methods), Number treated as Detected
Maximum Non-Detect
Minimum Non-DetectMinimum Non-Detect
Maximum Non-Detect
Maximum Detected
SD of Detected SD of Detected
Mean of Detected
Percent Non-Detects
General Statistics
Number of Detected Data
Number of Distinct Detected Data Number of Non-Detect Data
Number of Valid Data
Chemical (dibenz(a,h)anthracene)
Note: Suggestions regarding the selection of a 95% UCL are provided to help the user to select the most appropriate 95% UCL.
These recommendations are based upon the results of the simulation studies summarized in Singh, Singh, and Iaci (2002)
and Singh and Singh (2003). For additional insight, the user may want to consult a statistician.
Use 95% Chebyshev (Mean, Sd) UCL 19.28Potential UCL to Use
97.5% Chebyshev(Mean, Sd) UCL 21.56
95% BCA Bootstrap UCL 16.57
Data not Gamma Distributed at 5% Significance Level 95% Chebyshev(Mean, Sd) UCL 19.28
Kolmogorov-Smirnov 5% Critical Value 0.0596
Mean 95% KM (Percentile Bootstrap) UCL
Nonparametric Statistics
5% A-D Critical Value Kaplan-Meier (KM) Method
A-D Test Statistic
K-S Test Statistic
nu star
Gamma Distribution Test with Detected Values Only Data Distribution Test with Detected Values Only
95% Percentile Bootstrap UCL
95% t UCL
SD in Original Scale
UCL Statistics
Lognormal Distribution Test with Detected Values Only
Observations < Largest ND are treated as NDs
Normal Distribution Test with Detected Values Only
Lilliefors Test Statistic Lilliefors Test Statistic
Mean of Detected
Raw Statistics Log-transformed Statistics
Minimum Detected Minimum Detected
Maximum Detected
Assuming Gamma Distribution 99% Chebyshev(Mean, Sd) UCL 26.03
95% Approximate Gamma UCL 15.22
95% Adjusted Gamma UCL 15.23
Page 22 of 42
ON-SITE SOILS (0-10 FEET BGS)1.699 0.948
1.862 1.157
0.18 1.569
9.506
100.2
78.11 1.157
2.19
2.193
95% KM (BCA) UCL 296.3Maximum 20000
95% KM (bootstrap t) UCL 3877
95% KM (jackknife) UCL 250.1Gamma ROS Statistics using Extrapolated Data
Minimum 1E-12
SE of Mean 79.79Data not Gamma Distributed at 5% Significance Level
Assuming Gamma Distribution 95% KM (z) UCL 249.9
95% KM (t) UCL 250.3
Mean 118.6
5% K-S Critical Value 0.0823 SD 1329
K-S Test Statistic 0.999
nu star 49.71
Nonparametric Statistics
5% A-D Critical Value 0.999 Kaplan-Meier (KM) Method
A-D Test Statistic 23.28
k star (bias corrected) 0.149
Theta Star 1331
95% BCA Bootstrap UCL 364.2
Gamma Distribution Test with Detected Values Only Data Distribution Test with Detected Values Only
95% Percentile Bootstrap UCL 262.5
95% t UCL 250.1
SD in Original Scale 1331
Mean in Original Scale 118.6
Mean in Log Scale -2.831MLE yields a negative mean
SD in Log Scale 4.477
Maximum Likelihood Estimate(MLE) Method N/A Log ROS Method
Mean 118.6 Mean -1.801
SD 1331 SD 3.241
DL/2 Substitution Method DL/2 Substitution Method
UCL Statistics
Normal Distribution Test with Detected Values Only
Assuming Normal Distribution Assuming Lognormal Distribution
5% Lilliefors Critical Value 0.0686 5% Lilliefors Critical Value 0.0686
Observations < Largest ND are treated as NDs Single DL Non-Detect Percentage 65.23%
Number treated as Non-Detect 182Note: Data have multiple DLs - Use of KM Method is recommended
Number treated as Detected 97For all methods (except KM, DL/2, and ROS Methods),
Maximum Non-Detect -1.109Maximum Non-Detect 0.33
SD of Detected 2.947
Minimum Non-Detect 0.01 Minimum Non-Detect -4.605
SD of Detected 1718
Mean of Detected 198.1 Mean of Detected 0.0652
Maximum Detected 20000 Maximum Detected 9.903
Raw Statistics Log-transformed Statistics
Minimum Detected 0.016 Minimum Detected -4.135
Percent Non-Detects 40.14%
Number of Distinct Detected Data 126 Number of Non-Detect Data 112
Number of Valid Data 279
General Statistics
Number of Detected Data 167
Chemical (fluoranthene)
Note: DL/2 is not a recommended method.
Note: Suggestions regarding the selection of a 95% UCL are provided to help the user to select the most appropriate 95% UCL.
For additional insight, the user may want to consult a statistician.
These recommendations are based upon the results of the simulation studies summarized in Singh, Maichle, and Lee (2006).
95% Gamma Approximate UCL
95% Adjusted Gamma UCL
Potential UCLs to UseNu star
AppChi2 97.5% KM (Chebyshev) UCL
Theta star
k star 99% KM (Chebyshev) UCL
SD 97.5% KM (Chebyshev) UCL
Data do not follow a Discernable Distribution (0.05)
95% DL/2 (t) UCL 250.1 95% H-Stat (DL/2) UCL 77.03
Data not Normal at 5% Significance Level Data not Lognormal at 5% Significance Level
Lognormal Distribution Test with Detected Values Only
Lilliefors Test Statistic 0.47 Lilliefors Test Statistic 0.0922
95% KM (Chebyshev) UCLMedian
Page 23 of 42
ON-SITE SOILS (0-10 FEET BGS)
Minimum 1E-12 95% KM (bootstrap t) UCL 386.7
95% KM (z) UCL 13.67Assuming Gamma Distribution
Gamma ROS Statistics using Extrapolated Data 95% KM (jackknife) UCL 13.58
95% KM (t) UCL 13.7
Data not Gamma Distributed at 5% Significance Level SE of Mean 5.095
SD
A-D Test Statistic 4.596 Nonparametric Statistics
5% A-D Critical Value 0.917 Kaplan-Meier (KM) Method
nu star 10.03
k star (bias corrected) 0.167 Data appear Lognormal at 5% Significance Level
Theta Star 293.7
Gamma Distribution Test with Detected Values Only Data Distribution Test with Detected Values Only
95% BCA Bootstrap UCL 20.55
95% Percentile Bootstrap UCL 15.28
95% t UCL 13.56
SD in Original Scale 83.82
Mean in Original Scale 5.281
SD in Log Scale 5.65
Mean in Log Scale -10.87MLE method failed to converge properly
Maximum Likelihood Estimate(MLE) Method N/A Log ROS Method
Assuming Lognormal Distribution
SD 88.89 SD 2.078
DL/2 Substitution Method DL/2 Substitution Method
Shapiro Wilk Test Statistic 0.198 Shapiro Wilk Test Statistic 0.928
UCL Statistics
Normal Distribution Test with Detected Values Only Lognormal Distribution Test with Detected Values Only
Number treated as Detected 1For all methods (except KM, DL/2, and ROS Methods),
Single DL Non-Detect Percentage 99.64%Observations < Largest ND are treated as NDs
Number treated as Non-Detect 278Note: Data have multiple DLs - Use of KM Method is recommended
Minimum Non-Detect 0.01 Minimum Non-Detect -4.605
SD of Detected 255.2 SD of Detected 2.761
Mean of Detected 49.11 Mean of Detected -0.828
Maximum Detected 1400 Maximum Detected 7.244
Raw Statistics Log-transformed Statistics
Percent Non-Detects 89.25%
Chemical (fluorene)
General Statistics
Note: DL/2 is not a recommended method.
Note: Suggestions regarding the selection of a 95% UCL are provided to help the user to select the most appropriate 95% UCL.
For additional insight, the user may want to consult a statistician.
These recommendations are based upon the results of the simulation studies summarized in Singh, Maichle, and Lee (2006).
95% Adjusted Gamma UCL 190.1
95% Gamma Approximate UCL 189.7
Nu star 31.79 Potential UCLs to Use
AppChi2 19.9 97.5% KM (Chebyshev) UCL 616.9
Theta star 2085
k star 0.057 99% KM (Chebyshev) UCL 912.5
97.5% KM (Chebyshev) UCL 616.9
95% KM (Chebyshev) UCL 466.4Median 0.048
SD 1331
95% KM (Percentile Bootstrap) UCL 261.7Mean 118.8
83.67
K-S Test Statistic 0.917 Mean 5.294
5% K-S Critical Value 0.179
Mean 7.244 Mean -3.456
95% DL/2 (t) UCL 16.03 95% H-Stat (DL/2) UCL 0.408
Data appear Lognormal at 5% Significance Level
5% Shapiro Wilk Critical Value 0.927 5% Shapiro Wilk Critical Value 0.927
Data not Normal at 5% Significance Level
Assuming Normal Distribution
Maximum Non-Detect 1000 Maximum Non-Detect 6.908
Minimum Detected 0.01 Minimum Detected -4.605
Number of Non-Detect Data 249
Number of Valid Data 279 Number of Detected Data 30
Number of Distinct Detected Data 30
Page 24 of 42
ON-SITE SOILS (0-10 FEET BGS)
279 154
112 125
44.80%
0.01 -4.605
7500 8.923
75.21 -0.0497
637.7 2.677
0.01 -4.605
0.33 -1.109
183
96
65.59%
0.468 0.0863
0.0714 0.0714
41.52 -2.092
474.6 3.036
88.41 27.34
N/A
-3.073
4.204
41.52
474.6
88.41
87.61
139.7
0.173
434.1
53.37
19.2
0.955
0.955 41.52
0.0849 473.7
28.45
88.48
88.32
88.41
95% KM (z) UCLAssuming Gamma Distribution
Gamma ROS Statistics using Extrapolated Data 95% KM (jackknife) UCL
95% KM (t) UCL
Data not Gamma Distributed at 5% Significance Level SE of Mean
SD
A-D Test Statistic Nonparametric Statistics
5% A-D Critical Value Kaplan-Meier (KM) Method
nu star
k star (bias corrected) Data do not follow a Discernable Distribution (0.05)
Theta Star
Gamma Distribution Test with Detected Values Only Data Distribution Test with Detected Values Only
95% BCA Bootstrap UCL
95% Percentile Bootstrap UCL
95% t UCL
SD in Original Scale
Mean in Original Scale
SD in Log Scale
Mean in Log ScaleMLE yields a negative mean
Maximum Likelihood Estimate(MLE) Method Log ROS Method
Assuming Lognormal Distribution
SD SD
DL/2 Substitution Method DL/2 Substitution Method
Lilliefors Test Statistic Lilliefors Test Statistic
UCL Statistics
Normal Distribution Test with Detected Values Only Lognormal Distribution Test with Detected Values Only
Number treated as DetectedFor all methods (except KM, DL/2, and ROS Methods),
Single DL Non-Detect PercentageObservations < Largest ND are treated as NDs
Number treated as Non-DetectNote: Data have multiple DLs - Use of KM Method is recommended
Minimum Non-Detect Minimum Non-Detect
SD of Detected SD of Detected
Maximum Detected Maximum Detected
Mean of Detected Mean of Detected
Raw Statistics Log-transformed Statistics
Percent Non-Detects
Number of Valid Data Number of Detected Data
Chemical (indeno(1,2,3-cd)pyrene)
General Statistics
Note: DL/2 is not a recommended method.
Note: Suggestions regarding the selection of a 95% UCL are provided to help the user to select the most appropriate 95% UCL.
For additional insight, the user may want to consult a statistician.
These recommendations are based upon the results of the simulation studies summarized in Singh, Maichle, and Lee (2006).
95% Adjusted Gamma UCL 60.03
95% Gamma Approximate UCL 59.97
Nu star 164.4 Potential UCLs to Use
AppChi2 135.8 97.5% KM (Chebyshev) UCL 37.11
99% KM (Chebyshev) UCL 55.99
Theta star 168.1
k star 0.295
95% KM (Chebyshev) UCL 27.5
SD 84.44 97.5% KM (Chebyshev) UCL 37.11
Median 58.89
Mean 49.52 95% KM (Percentile Bootstrap) UCL 15.28
Maximum 1400 95% KM (BCA) UCL 15.35
K-S Test Statistic Mean
5% K-S Critical Value
Mean Mean
95% DL/2 (t) UCL 95% H-Stat (DL/2) UCL
Data not Lognormal at 5% Significance Level
5% Lilliefors Critical Value 5% Lilliefors Critical Value
Data not Normal at 5% Significance Level
Assuming Normal Distribution
Maximum Non-Detect Maximum Non-Detect
Minimum Detected Minimum Detected
Number of Distinct Detected Data Number of Non-Detect Data
Page 25 of 42
ON-SITE SOILS (0-10 FEET BGS)1E-12 1176
7500 103
47.5 96.04
0.11 165.5
474.7 219.2
0.0644 324.6
737.8
35.93
23.21 219.2
73.53
73.7
Note: Suggestions regarding the selection of a 95% UCL are provided to help the user to select the most appropriate 95% UCL.
These recommendations are based upon the results of the simulation studies summarized in Singh, Singh, and Iaci (2002)
and Singh and Singh (2003). For additional insight, the user may want to consult a statistician.
Potential UCL to Use Use 95% Chebyshev (Mean, Sd) UCL 631.1
99% Chebyshev(Mean, Sd) UCL 1204Assuming Gamma Distribution
95% Approximate Gamma UCL 229.1
95% Chebyshev(Mean, Sd) UCL 631.1Data not Gamma Distributed at 5% Significance Level
97.5% Chebyshev(Mean, Sd) UCL 824.4
Kolmogorov-Smirnov 5% Critical Value 0.064 95% BCA Bootstrap UCL 492.8
Kolmogorov-Smirnov Test Statistic 0.242 95% Percentile Bootstrap UCL 388
Anderson-Darling 5% Critical Value 0.885 95% Hall's Bootstrap UCL 939.9
Anderson-Darling Test Statistic 4.098E+28 95% Bootstrap-t UCL 1160
95% Standard Bootstrap UCL 352.5
Adjusted Chi Square Value 104.3 95% Jackknife UCL 353.6
Adjusted Level of Significance 0.049 95% CLT UCL 353
nu star 129.8
Approximate Chi Square Value (.05) 104.5 Nonparametric Statistics
MLE of Standard Deviation 357.6
MLE of Mean 184.4
Data do not follow a Discernable Distribution (0.05)k star (bias corrected) 0.266
Theta Star 693.4
Gamma Distribution Test Data Distribution
95% Modified-t UCL (Johnson-1978) 370.1 99% Chebyshev (MVUE) UCL 192.5
Assuming Normal Distribution Assuming Lognormal Distribution
95% Student's-t UCL 353.6 95% H-UCL 98.06
Data not Normal at 5% Significance Level Data not Lognormal at 5% Significance Level
Lilliefors Critical Value 0.0567 Lilliefors Critical Value 0.0567
Lilliefors Test Statistic 0.454 Lilliefors Test Statistic 0.15
Relevant UCL Statistics
Normal Distribution Test Lognormal Distribution Test
Skewness 15.1
Coefficient of Variation 8.68
Median 6.855 SD of log Data 1.821
SD 1601
Maximum 24800 Maximum of Log Data 10.12
Raw Statistics Log-transformed Statistics
Number of Valid Observations 244 Number of Distinct Observations 223
Chemical (lead)
General Statistics
Note: DL/2 is not a recommended method.
Note: Suggestions regarding the selection of a 95% UCL are provided to help the user to select the most appropriate 95% UCL.
For additional insight, the user may want to consult a statistician.
These recommendations are based upon the results of the simulation studies summarized in Singh, Maichle, and Lee (2006).
95% Adjusted Gamma UCL
95% Gamma Approximate UCL
Nu star Potential UCLs to Use
AppChi2 97.5% KM (Chebyshev) UCL
99% KM (Chebyshev) UCL
Theta star
k star
95% KM (Chebyshev) UCL
SD 97.5% KM (Chebyshev) UCL
Median
Mean 95% KM (Percentile Bootstrap) UCL
Maximum 95% KM (BCA) UCL
Minimum 95% KM (bootstrap t) UCL
95% Adjusted Gamma UCL 229.4
122.6
95% Adjusted-CLT UCL (Chen-1995) 458.8 97.5% Chebyshev (MVUE) UCL 146.2
95% UCLs (Adjusted for Skewness) 95% Chebyshev (MVUE) UCL
Mean 184.4 Mean of log Data 2.579
Minimum 1.09 Minimum of Log Data 0.0862
Page 26 of 42
ON-SITE SOILS (0-10 FEET BGS)
Nu star 41.4 Potential UCLs to Use
AppChi2 27.66 95% KM (t) UCL 0.58
Theta star 461.8
95% KM (Chebyshev) UCL 1.181
k star 0.0742 99% KM (Chebyshev) UCL 2.422
SD 60.09 97.5% KM (Chebyshev) UCL 1.6
Maximum 296.1
Median 3.109
Mean 34.26 95% KM (Percentile Bootstrap) UCL 0.628
Minimum 1E-12 95% KM (bootstrap t) UCL 30.38
95% KM (z) UCL 0.579
Gamma ROS Statistics using Extrapolated Data 95% KM (jackknife) UCL 0.557
Mean 0.214
5% K-S Critical Value 0.326 SD 3.466
K-S Test Statistic 0.856
A-D Test Statistic 0.93 Nonparametric Statistics
5% A-D Critical Value 0.856 Kaplan-Meier (KM) Method
Theta Star 42.67
nu star 2.789
Gamma Distribution Test with Detected Values Only Data Distribution Test with Detected Values Only
k star (bias corrected) 0.174 Data Follow Appr. Gamma Distribution at 5% Significance Level
95% BCA Bootstrap UCL 1.042
95% Percentile Bootstrap UCL 0.629
95% t UCL 0.556
MLE method failed to converge properly Mean in Log Scale -20.72
SD in Log Scale 6.82
Maximum Likelihood Estimate(MLE) Method N/A Log ROS Method
95% DL/2 (t) UCL 0.582 95% H-Stat (DL/2) UCL 0.00569
SD 3.478 SD 1.542
Mean 0.238 Mean -6.602
DL/2 Substitution Method DL/2 Substitution Method
Assuming Normal Distribution Assuming Lognormal Distribution
UCL Statistics
Data not Normal at 5% Significance Level Data appear Lognormal at 5% Significance Level
5% Shapiro Wilk Critical Value
Note: It should be noted that even though bootstrap may be performed on this data set
the resulting calculations may not be reliable enough to draw conclusions
It is recommended to have 10-15 or more distinct observations for accurate and meaningful results.
Note: Data have multiple DLs - Use of KM Method is recommended Number treated as Non-Detect 278
Warning: There are only 8 Detected Values in this data
For all methods (except KM, DL/2, and ROS Methods),
Observations < Largest ND are treated as NDs Single DL Non-Detect Percentage 99.64%
Maximum Non-Detect 5 Maximum Non-Detect 1.609
SD of Detected 20.43
Minimum Non-Detect 0.00042
Mean of Detected 7.44 Mean of Detected -3.294
Maximum Detected 58 Maximum Detected 4.06
Raw Statistics Log-transformed Statistics
Minimum Detected 0.0007 Minimum Detected -7.264
Percent Non-Detects 97.13%
General Statistics
Number of Distinct Detected Data 8 Number of Non-Detect Data 271
Number of Valid Data 279 Number of Detected Data 8
Chemical (m,p-xylene)
95% KM (BCA) UCL 0.64
Assuming Gamma Distribution
Data follow Appr. Gamma Distribution at 5% Significance Level SE of Mean 0.222
95% KM (t) UCL 0.58
3.473
Mean in Original Scale 0.213
SD in Original Scale
0.818 5% Shapiro Wilk Critical Value 0.818
Normal Distribution Test with Detected Values Only Lognormal Distribution Test with Detected Values Only
Shapiro Wilk Test Statistic 0.432 Shapiro Wilk Test Statistic 0.896
Number treated as Detected 1
SD of Detected 4.029
Minimum Non-Detect -7.775
Page 27 of 42
ON-SITE SOILS (0-10 FEET BGS)
Nu star 84.22 Potential UCLs to Use
Theta star 0.788
95% KM (Chebyshev) UCL 0.0915
k star 0.173 99% KM (Chebyshev) UCL 0.159
SD 0.192 97.5% KM (Chebyshev) UCL 0.114
Maximum 2.77
Median 0.14
Mean 0.137 95% KM (Percentile Bootstrap) UCL 0.0621
Minimum 1E-12 95% KM (bootstrap t) UCL 0.0931
95% KM (z) UCL 0.0586
Gamma ROS Statistics using Extrapolated Data 95% KM (jackknife) UCL 0.0585
Mean 0.0387
5% K-S Critical Value 0.169 SD 0.18
K-S Test Statistic 0.809
A-D Test Statistic 1.801 Nonparametric Statistics
5% A-D Critical Value 0.809 Kaplan-Meier (KM) Method
Theta Star 0.37
nu star 28.62
Gamma Distribution Test with Detected Values Only Data Distribution Test with Detected Values Only
k star (bias corrected) 0.477 Data do not follow a Discernable Distribution (0.05)
95% BCA Bootstrap UCL 0.0816
95% Percentile Bootstrap UCL 0.0659
95% t UCL 0.0629
MLE yields a negative mean Mean in Log Scale -3.997
SD in Log Scale 1.147
Maximum Likelihood Estimate(MLE) Method N/A Log ROS Method
95% DL/2 (t) UCL 0.0774 95% H-Stat (DL/2) UCL 0.0522
SD 0.178 SD 0.52
Mean 0.0586 Mean -3.149
Assuming Normal Distribution Assuming Lognormal Distribution
DL/2 Substitution Method DL/2 Substitution Method
Data not Normal at 5% Significance Level Data not Lognormal at 5% Significance Level
5% Shapiro Wilk Critical Value
Observations < Largest ND are treated as NDs Single DL Non-Detect Percentage 94.24%
Raw Statistics Log-transformed Statistics
SD of Detected 0.498 SD of Detected 1.489
Mean of Detected 0.176
Percent Non-Detects 87.65%
Number of Non-Detect Data 213Number of Distinct Detected Data 30
General Statistics
Number of Valid Data 243 Number of Detected Data 30
For additional insight, the user may want to consult a statistician.
Chemical (mercury)
Note: DL/2 is not a recommended method.
Note: Suggestions regarding the selection of a 95% UCL are provided to help the user to select the most appropriate 95% UCL.
These recommendations are based upon the results of the simulation studies summarized in Singh, Maichle, and Lee (2006).
95% Adjusted Gamma UCL 51.41
95% Gamma Approximate UCL 51.3
95% KM (BCA) UCL 0.0633
Assuming Gamma Distribution
Data not Gamma Distributed at 5% Significance Level SE of Mean 0.0121
95% KM (t) UCL 0.0587
0.181
Mean in Original Scale 0.0437
SD in Original Scale
0.927 5% Shapiro Wilk Critical Value 0.927
UCL Statistics
Normal Distribution Test with Detected Values Only Lognormal Distribution Test with Detected Values Only
Shapiro Wilk Test Statistic 0.323 Shapiro Wilk Test Statistic 0.924
For all methods (except KM, DL/2, and ROS Methods), Number treated as Detected 14
Note: Data have multiple DLs - Use of KM Method is recommended Number treated as Non-Detect 229
-2.303
Minimum Non-Detect 0.0835 Minimum Non-Detect -2.483
Maximum Non-Detect 0.1 Maximum Non-Detect
Mean of Detected -2.99
Maximum Detected 2.77 Maximum Detected 1.019
Minimum Detected 0.00635 Minimum Detected -5.059
Page 28 of 42
ON-SITE SOILS (0-10 FEET BGS)
Theta star 1.508
95% KM (Chebyshev) UCL 1.043
k star 1.158 99% KM (Chebyshev) UCL 1.754
SD 1.906 97.5% KM (Chebyshev) UCL 1.283
Maximum 22.2
Median 1.669
Mean 1.746 95% KM (Percentile Bootstrap) UCL 0.707
Minimum 1E-12 95% KM (bootstrap t) UCL 0.863
95% KM (z) UCL 0.697
Gamma ROS Statistics using Extrapolated Data 95% KM (jackknife) UCL 0.699
Mean 0.488
5% K-S Critical Value 0.154 SD 1.919
K-S Test Statistic 0.803
A-D Test Statistic 2.539 Nonparametric Statistics
5% A-D Critical Value 0.803 Kaplan-Meier (KM) Method
Theta Star 4.299
nu star 40.85
Gamma Distribution Test with Detected Values Only Data Distribution Test with Detected Values Only
k star (bias corrected) 0.567 Data appear Lognormal at 5% Significance Level
95% BCA Bootstrap UCL 0.771
95% Percentile Bootstrap UCL 0.677
95% t UCL 0.661
MLE yields a negative mean Mean in Log Scale -2.466
SD in Log Scale 1.644
Maximum Likelihood Estimate(MLE) Method N/A Log ROS Method
95% DL/2 (t) UCL 0.673 95% H-Stat (DL/2) UCL 0.272
SD 1.926 SD 0.86
Mean 0.469 Mean -1.784
Assuming Normal Distribution Assuming Lognormal Distribution
DL/2 Substitution Method DL/2 Substitution Method
Data not Normal at 5% Significance Level Data appear Lognormal at 5% Significance Level
5% Shapiro Wilk Critical Value
Observations < Largest ND are treated as NDs Single DL Non-Detect Percentage 90.95%
Raw Statistics Log-transformed Statistics
SD of Detected 4.578 SD of Detected 1.348
Mean of Detected 2.439
Percent Non-Detects 85.19%
Number of Non-Detect Data 207Number of Distinct Detected Data 35
General Statistics
Number of Valid Data 243 Number of Detected Data 36
For additional insight, the user may want to consult a statistician.
Chemical (molybdenum)
Note: DL/2 is not a recommended method.
Note: Suggestions regarding the selection of a 95% UCL are provided to help the user to select the most appropriate 95% UCL.
These recommendations are based upon the results of the simulation studies summarized in Singh, Maichle, and Lee (2006).
95% Adjusted Gamma UCL 0.18
95% Gamma Approximate UCL 0.18
AppChi2 64.07 95% KM (BCA) UCL 0.0633
95% KM (BCA) UCL 0.734
Assuming Gamma Distribution
Data not Gamma Distributed at 5% Significance Level SE of Mean 0.127
95% KM (t) UCL 0.698
1.931
Mean in Original Scale 0.457
SD in Original Scale
0.935 5% Shapiro Wilk Critical Value 0.935
UCL Statistics
Normal Distribution Test with Detected Values Only Lognormal Distribution Test with Detected Values Only
Shapiro Wilk Test Statistic 0.546 Shapiro Wilk Test Statistic 0.936
For all methods (except KM, DL/2, and ROS Methods), Number treated as Detected 22
Note: Data have multiple DLs - Use of KM Method is recommended Number treated as Non-Detect 221
-0.693
Minimum Non-Detect 0.25 Minimum Non-Detect -1.386
Maximum Non-Detect 0.5 Maximum Non-Detect
Mean of Detected -0.141
Maximum Detected 22.2 Maximum Detected 3.1
Minimum Detected 0.1 Minimum Detected -2.303
Page 29 of 42
ON-SITE SOILS (0-10 FEET BGS)
95% KM (Chebyshev) UCL 451.9
k star 0.279 99% KM (Chebyshev) UCL 914.4
SD 1412 97.5% KM (Chebyshev) UCL 607.9
Maximum 23000
Median 182.8
Mean 332 95% KM (Percentile Bootstrap) UCL 255.4
Minimum 0.016 95% KM (bootstrap t) UCL 3444
95% KM (z) UCL 227.4
Gamma ROS Statistics using Extrapolated Data 95% KM (jackknife) UCL 227.5
Mean 91.33
5% K-S Critical Value 0.0988 SD 1375
K-S Test Statistic 0.987
A-D Test Statistic 21.17 Nonparametric Statistics
5% A-D Critical Value 0.987 Kaplan-Meier (KM) Method
Theta Star 1681
nu star 30.3
Gamma Distribution Test with Detected Values Only Data Distribution Test with Detected Values Only
k star (bias corrected) 0.138 Data appear Lognormal at 5% Significance Level
95% BCA Bootstrap UCL 341
95% Percentile Bootstrap UCL 255.5
95% t UCL 227.4
MLE method failed to converge properly Mean in Log Scale -4.717
SD in Log Scale 4.484
Maximum Likelihood Estimate(MLE) Method N/A Log ROS Method
95% DL/2 (t) UCL 229.3 95% H-Stat (DL/2) UCL 5.651
SD 1378 SD 2.726
Mean 93.12 Mean -2.634
Assuming Normal Distribution Assuming Lognormal Distribution
DL/2 Substitution Method DL/2 Substitution Method
Data not Normal at 5% Significance Level Data appear Lognormal at 5% Significance Level
5% Lilliefors Critical Value
Observations < Largest ND are treated as NDs Single DL Non-Detect Percentage 99.64%
Raw Statistics Log-transformed Statistics
SD of Detected 2193 SD of Detected 2.646
Mean of Detected 231.5
Percent Non-Detects 60.57%
Number of Non-Detect Data 169Number of Distinct Detected Data 95
General Statistics
Number of Valid Data 279 Number of Detected Data 110
For additional insight, the user may want to consult a statistician.
Chemical (naphthalene)
Note: DL/2 is not a recommended method.
Note: Suggestions regarding the selection of a 95% UCL are provided to help the user to select the most appropriate 95% UCL.
These recommendations are based upon the results of the simulation studies summarized in Singh, Maichle, and Lee (2006).
95% Adjusted Gamma UCL 1.933
95% Gamma Approximate UCL 1.931
Nu star 562.8 Potential UCLs to Use
AppChi2 508.8 95% KM (BCA) UCL 0.734
95% KM (BCA) UCL 255.9
Assuming Gamma Distribution
Data not Gamma Distributed at 5% Significance Level SE of Mean 82.72
95% KM (t) UCL 227.9
1378
Mean in Original Scale 91.29
SD in Original Scale
0.0845 5% Lilliefors Critical Value 0.0845
UCL Statistics
Normal Distribution Test with Detected Values Only Lognormal Distribution Test with Detected Values Only
Lilliefors Test Statistic 0.475 Lilliefors Test Statistic 0.0766
For all methods (except KM, DL/2, and ROS Methods), Number treated as Detected 1
Note: Data have multiple DLs - Use of KM Method is recommended Number treated as Non-Detect 278
6.908
Minimum Non-Detect 0.015 Minimum Non-Detect -4.2
Maximum Non-Detect 1000 Maximum Non-Detect
Mean of Detected -0.317
Maximum Detected 23000 Maximum Detected 10.04
Minimum Detected 0.016 Minimum Detected -4.135
Page 30 of 42
ON-SITE SOILS (0-10 FEET BGS)
Number of Non-Detect Data 274
Number of Detected Data 5Number of Valid Data 279
Number of Distinct Detected Data 5
Chemical (o-xylene)
General Statistics
Note: Suggestions regarding the selection of a 95% UCL are provided to help the user to select the most appropriate 95% UCL.
These recommendations are based upon the results of the simulation studies summarized in Singh, Singh, and Iaci (2002)
and Singh and Singh (2003). For additional insight, the user may want to consult a statistician.
Use 95% Chebyshev (Mean, Sd) UCL 116.8Potential UCL to Use
95% Adjusted Gamma UCL 44.32
99% Chebyshev(Mean, Sd) UCL 218.3Assuming Gamma Distribution
95% Approximate Gamma UCL 44.28
97.5% Chebyshev(Mean, Sd) UCL 151
95% Chebyshev(Mean, Sd) UCL 116.8
Kolmogorov-Smirnov Test Statistic 0.356
Data not Gamma Distributed at 5% Significance Level
Kolmogorov-Smirnov 5% Critical Value 0.0624 95% BCA Bootstrap UCL 95.93
Approximate Chi Square Value (.05) 186.3 Nonparametric Statistics
Anderson-Darling Test Statistic 4.115E+28 95% Bootstrap-t UCL 189.7
Adjusted Chi Square Value 186.1 95% Jackknife UCL
MLE of Mean 37.57
nu star 219.6
MLE of Standard Deviation
k star (bias corrected) 0.452
Theta Star 83.15
Gamma Distribution Test Data Distribution
95% Modified-t UCL (Johnson-1978) 70.39 99% Chebyshev (MVUE) UCL 25.73
21.61
95% Chebyshev (MVUE) UCL 19.51
95% Student's-t UCL
95% UCLs (Adjusted for Skewness)
95% Adjusted-CLT UCL (Chen-1995) 85.6 97.5% Chebyshev (MVUE) UCL
Lilliefors Critical Value 0.0568 Lilliefors Critical Value 0.0568
Skewness 14.57
Relevant UCL Statistics
Normal Distribution Test Lognormal Distribution Test
Coefficient of Variation 7.539
Maximum 4330 Maximum of Log Data 8.373
Raw Statistics Log-transformed Statistics
Minimum 2.06 Minimum of Log Data 0.723
General Statistics
Number of Valid Observations 243 Number of Distinct Observations 207
For additional insight, the user may want to consult a statistician.
Chemical (nickel)
Note: DL/2 is not a recommended method.
Note: Suggestions regarding the selection of a 95% UCL are provided to help the user to select the most appropriate 95% UCL.
These recommendations are based upon the results of the simulation studies summarized in Singh, Maichle, and Lee (2006).
95% Adjusted Gamma UCL 404.7
95% Gamma Approximate UCL 404.3
Nu star 155.9 Potential UCLs to Use
AppChi2 128.1 97.5% KM (Chebyshev) UCL 607.9
Theta star 1188
95% Percentile Bootstrap UCL 72.64
95% Standard Bootstrap UCL 67.08
Anderson-Darling 5% Critical Value 0.832 95% Hall's Bootstrap UCL 159.1
67.56
Adjusted Level of Significance 0.049 95% CLT UCL 67.45
55.89
Data do not follow a Discernable Distribution (0.05)
67.56 95% H-UCL 16.83
Data not Normal at 5% Significance Level Data not Lognormal at 5% Significance Level
Assuming Normal Distribution Assuming Lognormal Distribution
Lilliefors Test Statistic 0.45 Lilliefors Test Statistic 0.163
Median 7.09 SD of log Data 0.98
SD 283.2
Mean 37.57 Mean of log Data 2.208
Page 31 of 42
ON-SITE SOILS (0-10 FEET BGS)
Note: DL/2 is not a recommended method.
Note: Suggestions regarding the selection of a 95% UCL are provided to help the user to select the most appropriate 95% UCL.
These recommendations are based upon the results of the simulation studies summarized in Singh, Maichle, and Lee (2006).
95% Adjusted Gamma UCL 5.218
95% Gamma Approximate UCL 5.208
Nu star 54.1 Potential UCLs to Use
AppChi2 38.2 95% KM (t) UCL 0.197
k star 0.097 99% KM (Chebyshev) UCL 0.827
Theta star 37.93
0.307
SD 3.007 97.5% KM (Chebyshev) UCL 0.546
Median 4.832
95% KM (jackknife) UCL
Maximum 19 95% KM (BCA) UCL
0.778
Assuming Gamma Distribution 95% KM (z) UCL 0.196
5% K-S Critical Value 0.389 SD 1.136
nu star 2.112
95% BCA Bootstrap UCL 0.279
95% Percentile Bootstrap UCL 0.207
95% t UCL 0.183
MLE method failed to converge properly Mean in Log Scale -29.51
SD in Original Scale 1.138
Mean in Original Scale 0.0704
Maximum Likelihood Estimate(MLE) Method N/A Log ROS Method
SD 1.156 SD 1.704
95% DL/2 (t) UCL 0.209 95% H-Stat (DL/2) UCL 0.00457
Assuming Normal Distribution Assuming Lognormal Distribution
DL/2 Substitution Method DL/2 Substitution Method
5% Shapiro Wilk Critical Value 0.762 5% Shapiro Wilk Critical Value 0.762
Warning: There are only 5 Detected Values in this data
Note: It should be noted that even though bootstrap may be performed on this data set
the resulting calculations may not be reliable enough to draw conclusions
Single DL Non-Detect Percentage 99.64%Observations < Largest ND are treated as NDs
Number treated as Non-Detect 278Note: Data have multiple DLs - Use of KM Method is recommended
Number treated as Detected 1For all methods (except KM, DL/2, and ROS Methods),
Maximum Non-Detect 1.609Maximum Non-Detect 5
SD of Detected 4.015
Minimum Non-Detect 0.00021 Minimum Non-Detect -8.468
SD of Detected 8.427
Mean of Detected 3.929 Mean of Detected -2.427
Maximum Detected 19 Maximum Detected 2.944
Log-transformed Statistics
Minimum Detected 0.00058 Minimum Detected -7.452
Raw Statistics
Percent Non-Detects 98.21%
95% KM (Chebyshev) UCL 0.402
Minimum 1E-12 95% KM (bootstrap t) UCL 4.959
19
Mean 3.678 95% KM (Percentile Bootstrap) UCL
0.178
Data appear Gamma Distributed at 5% Significance Level SE of Mean 0.076
95% KM (t) UCL 0.197
Gamma ROS Statistics using Extrapolated Data
Mean 0.0711
A-D Test Statistic 0.361 Nonparametric Statistics
5% A-D Critical Value 0.778 Kaplan-Meier (KM) Method
K-S Test Statistic
18.6
Gamma Distribution Test with Detected Values Only Data Distribution Test with Detected Values Only
k star (bias corrected) 0.211 Data appear Gamma Distributed at 5% Significance Level
Theta Star
SD in Log Scale 8.588
Mean 0.0949 Mean -7.128
Data not Normal at 5% Significance Level Data appear Lognormal at 5% Significance Level
0.571 Shapiro Wilk Test Statistic 0.982
It is recommended to have 10-15 or more distinct observations for accurate and meaningful results.
UCL Statistics
Normal Distribution Test with Detected Values Only Lognormal Distribution Test with Detected Values Only
Shapiro Wilk Test Statistic
Page 32 of 42
ON-SITE SOILS (0-10 FEET BGS)
Note: DL/2 is not a recommended method.
Note: Suggestions regarding the selection of a 95% UCL are provided to help the user to select the most appropriate 95% UCL.
95% Gamma Approximate UCL 146
95% Adjusted Gamma UCL 146.1
Potential UCLs to Use
AppChi2 103.5 97.5% KM (Chebyshev) UCL 452
k star 0.231
Nu star 128.7
Theta star 508.8
SD 964.1 97.5% KM (Chebyshev) UCL 452
Minimum 0.012 95% KM (bootstrap t) UCL 2439
Maximum 13000 95% KM (BCA) UCL 210.3
Assuming Gamma Distribution 95% KM (z) UCL 185.6
Gamma ROS Statistics using Extrapolated Data 95% KM (jackknife) UCL 185.8
95% KM (t) UCL 185.9
0.995
SE of Mean 57.9Data not Gamma Distributed at 5% Significance Level
5% K-S Critical Value 0.0858 SD 964
nu star 45.73
k star (bias corrected) 0.148 Data do not follow a Discernable Distribution (0.05)
Theta Star 1103
Gamma Distribution Test with Detected Values Only Data Distribution Test with Detected Values Only
185.8
SD in Original Scale 965.7
SD in Log Scale
95% t UCL
Assuming Normal Distribution Assuming Lognormal Distribution
95% DL/2 (t) UCL 185.8 95% H-Stat (DL/2) UCL 37.03
SD 965.7
Data not Normal at 5% Significance Level Data not Lognormal at 5% Significance Level
5% Lilliefors Critical Value
Single DL Non-Detect Percentage 69.89%Observations < Largest ND are treated as NDs
Number treated as Non-Detect 195Note: Data have multiple DLs - Use of KM Method is recommended
Number treated as Detected 84For all methods (except KM, DL/2, and ROS Methods),
Maximum Non-Detect -1.109Maximum Non-Detect 0.33
SD of Detected 2.969
Minimum Non-Detect 0.01 Minimum Non-Detect -4.605
SD of Detected 1293
Mean of Detected 162.7 Mean of Detected -0.191
Maximum Detected 13000 Maximum Detected 9.473
Log-transformed Statistics
Minimum Detected 0.012 Minimum Detected -4.423
Raw Statistics
Percent Non-Detects 44.44%
Number of Distinct Detected Data 118 Number of Non-Detect Data 124
General Statistics
Number of Valid Data 279 Number of Detected Data 155
For additional insight, the user may want to consult a statistician.
Chemical (phenanthrene)
99% KM (Chebyshev) UCL 666.5
Mean 117.4 95% KM (Percentile Bootstrap) UCL 205.4
Median 36.74 95% KM (Chebyshev) UCL 342.8
Mean 90.39
Nonparametric Statistics
5% A-D Critical Value 0.995 Kaplan-Meier (KM) Method
A-D Test Statistic 21.9
K-S Test Statistic
95% BCA Bootstrap UCL 251.3
95% Percentile Bootstrap UCL 192.7
Mean in Original Scale 90.39
4.679
Maximum Likelihood Estimate(MLE) Method N/A Log ROS Method
MLE yields a negative mean Mean in Log Scale -3.533
SD 3.143
Mean 90.39 Mean -2.17
DL/2 Substitution Method DL/2 Substitution Method
0.0712
UCL Statistics
Normal Distribution Test with Detected Values Only Lognormal Distribution Test with Detected Values Only
Lilliefors Test Statistic 0.462 Lilliefors Test Statistic 0.0934
5% Lilliefors Critical Value 0.0712
Page 33 of 42
ON-SITE SOILS (0-10 FEET BGS)
Note: DL/2 is not a recommended method.
95% Adjusted Gamma UCL 198.5
95% Gamma Approximate UCL 198.1
Nu star 32.66 Potential UCLs to Use
97.5% KM (Chebyshev) UCL 645.2AppChi2 20.59
Theta star 2134
97.5% KM (Chebyshev) UCL 645.2
k star 0.0585 99% KM (Chebyshev) UCL 953.9
SD 1390
95% KM (Percentile Bootstrap) UCL 275.6
Median 0.061 95% KM (Chebyshev) UCL 488.1
Mean 124.9
Maximum 21000 95% KM (BCA) UCL 269.9
Minimum 1E-12 95% KM (bootstrap t) UCL 3703
95% KM (z) UCL 262Assuming Gamma Distribution
Gamma ROS Statistics using Extrapolated Data 95% KM (jackknife) UCL 262.3
SE of Mean 83.32Data not Gamma Distributed at 5% Significance Level
95% KM (t) UCL 262.4
5% K-S Critical Value 0.0806 SD 1388
K-S Test Statistic 0.999 Mean 124.9
Nonparametric Statistics
5% A-D Critical Value 0.999 Kaplan-Meier (KM) Method
A-D Test Statistic 23.6
nu star 51.94
Data do not follow a Discernable Distribution (0.05)k star (bias corrected) 0.15
Theta Star 1342
Gamma Distribution Test with Detected Values Only Data Distribution Test with Detected Values Only
95% Percentile Bootstrap UCL 275.7
95% BCA Bootstrap UCL 352.9
SD in Original Scale 1390
95% t UCL 262.3
Mean in Log Scale -2.587MLE yields a negative mean
Mean in Original Scale 124.9
Mean -1.674
95% DL/2 (t) UCL 262.3 95% H-Stat (DL/2) UCL 106
SD 1390
Data not Normal at 5% Significance Level Data not Lognormal at 5% Significance Level
5% Lilliefors Critical Value 0.0674 5% Lilliefors Critical Value 0.0674
Lilliefors Test Statistic 0.465 Lilliefors Test Statistic 0.0982
UCL Statistics
Normal Distribution Test with Detected Values Only Lognormal Distribution Test with Detected Values Only
Observations < Largest ND are treated as NDs Single DL Non-Detect Percentage 63.80%
Note: Data have multiple DLs - Use of KM Method is recommended Number treated as Non-Detect 178
Maximum Non-Detect 0.33 Maximum Non-Detect -1.109
Maximum Detected 21000 Maximum Detected 9.952
Raw Statistics Log-transformed Statistics
Minimum Detected -4.269Minimum Detected 0.014
Number of Non-Detect Data 106
Percent Non-Detects 37.99%
Number of Distinct Detected Data 130
Number of Valid Data 279 Number of Detected Data 173
General Statistics
For additional insight, the user may want to consult a statistician.
Chemical (pyrene)
These recommendations are based upon the results of the simulation studies summarized in Singh, Maichle, and Lee (2006).
SD in Log Scale 4.425
Maximum Likelihood Estimate(MLE) Method N/A Log ROS Method
SD 3.292
Assuming Normal Distribution Assuming Lognormal Distribution
DL/2 Substitution Method DL/2 Substitution Method
Mean 124.9
For all methods (except KM, DL/2, and ROS Methods), Number treated as Detected 101
Minimum Non-Detect -4.605
SD of Detected 1763 SD of Detected 2.953
Minimum Non-Detect 0.01
Mean of Detected 201.4 Mean of Detected 0.136
Page 34 of 42
ON-SITE SOILS (0-10 FEET BGS)
Note: DL/2 is not a recommended method.
Note: Suggestions regarding the selection of a 95% UCL are provided to help the user to select the most appropriate 95% UCL.
These recommendations are based upon the results of the simulation studies summarized in Singh, Maichle, and Lee (2006).
95% Adjusted Gamma UCL 0.446
95% Gamma Approximate UCL 0.445 95% KM (% Bootstrap) UCL 0.28
Nu star 139.1 Potential UCLs to Use
AppChi2 112.8 95% KM (t) UCL 0.271
Theta star 1.262
k star 0.286 99% KM (Chebyshev) UCL 0.438
SD 0.312 97.5% KM (Chebyshev) UCL 0.364
Median 0.346 95% KM (Chebyshev) UCL 0.325
Mean 0.361 95% KM (Percentile Bootstrap) UCL 0.28
Maximum 3.57 95% KM (BCA) UCL 0.278
Minimum 1E-12 95% KM (bootstrap t) UCL 0.286
Assuming Gamma Distribution 95% KM (z) UCL 0.271
Gamma ROS Statistics using Extrapolated Data 95% KM (jackknife) UCL 0.275
Data not Gamma Distributed at 5% Significance Level SE of Mean 0.0202
95% KM (t) UCL 0.271
5% K-S Critical Value 0.251 SD 0.219
K-S Test Statistic 0.75 Mean 0.237
A-D Test Statistic 1.75 Nonparametric Statistics
5% A-D Critical Value 0.75 Kaplan-Meier (KM) Method
nu star 24.76
k star (bias corrected) 1.032 Data do not follow a Discernable Distribution (0.05)
Theta Star 0.601
Gamma Distribution Test with Detected Values Only Data Distribution Test with Detected Values Only
95% BCA Bootstrap UCL 0.274
95% Percentile Bootstrap UCL 0.264
95% t UCL 0.261
SD in Original Scale 0.235
Mean in Original Scale 0.236
MLE yields a negative mean Mean in Log Scale -1.582
SD in Log Scale 0.472
Maximum Likelihood Estimate(MLE) Method N/A Log ROS Method
95% DL/2 (t) UCL 0.173 95% H-Stat (DL/2) UCL 0.143
SD 0.227 SD 0.303
Mean 0.149 Mean -2.022
Assuming Normal Distribution Assuming Lognormal Distribution
DL/2 Substitution Method DL/2 Substitution Method
Data not Normal at 5% Significance Level Data not Lognormal at 5% Significance Level
5% Shapiro Wilk Critical Value 0.859 5% Shapiro Wilk Critical Value 0.859
UCL Statistics
Normal Distribution Test with Detected Values Only Lognormal Distribution Test with Detected Values Only
Shapiro Wilk Test Statistic 0.447 Shapiro Wilk Test Statistic 0.775
Maximum Non-Detect 0.25
Minimum Non-Detect 0.25 Minimum Non-Detect -1.386
Maximum Non-Detect -1.386
SD of Detected 0.937 SD of Detected 0.777
Mean of Detected 0.62 Mean of Detected -0.909
Maximum Detected 3.57 Maximum Detected 1.273
Raw Statistics Log-transformed Statistics
Minimum Detected 0.17 Minimum Detected -1.772
Chemical (silver)
Percent Non-Detects 95.06%
Number of Distinct Detected Data 11 Number of Non-Detect Data
These recommendations are based upon the results of the simulation studies summarized in Singh, Maichle, and Lee (2006).
For additional insight, the user may want to consult a statistician.
Note: Suggestions regarding the selection of a 95% UCL are provided to help the user to select the most appropriate 95% UCL.
231
General Statistics
Number of Valid Data 243 Number of Detected Data 12
Page 35 of 42
ON-SITE SOILS (0-10 FEET BGS)
Note: DL/2 is not a recommended method.
Note: Suggestions regarding the selection of a 95% UCL are provided to help the user to select the most appropriate 95% UCL.
95% Adjusted Gamma UCL 0.093
Nu star 93.78 Potential UCLs to Use
95% Gamma Approximate UCL 0.0928
AppChi2 72.44 97.5% KM (Chebyshev) UCL 0.0405
Theta star 0.427
Mean 0.0717 95% KM (Percentile Bootstrap) UCL 0.0187
Assuming Gamma Distribution 95% KM (z) UCL 0.0168
Data not Gamma Distributed at 5% Significance Level SE of Mean 0.00516
K-S Test Statistic 0.881 Mean 0.00828
A-D Test Statistic 4.878 Nonparametric Statistics
Kaplan-Meier (KM) Method5% A-D Critical Value 0.881
Theta Star 0.367
nu star 11.54
Gamma Distribution Test with Detected Values Only
k star (bias corrected) 0.231 Data do not follow a Discernable Distribution (0.05)
Data Distribution Test with Detected Values Only
95% BCA Bootstrap UCL 0.0219
95% Percentile Bootstrap UCL 0.0151
95% t UCL 0.0159
SD in Original Scale 0.0837
Mean in Original Scale 0.00765
-12.25
Log ROS Method
SD in Log Scale 3.308
Maximum Likelihood Estimate(MLE) Method N/A
MLE method failed to converge properly Mean in Log Scale
95% DL/2 (t) UCL 2.407
SD 1.808
Mean -6.983Mean 0.928
SD 14.97
DL/2 Substitution Method DL/2 Substitution Method
Assuming Normal Distribution Assuming Lognormal Distribution
5% Shapiro Wilk Critical Value 0.918
Data not Normal at 5% Significance Level Data not Lognormal at 5% Significance Level
5% Shapiro Wilk Critical Value
Number treated as Detected 0For all methods (except KM, DL/2, and ROS Methods),
Single DL Non-Detect Percentage 100.00%
Note: Data have multiple DLs - Use of KM Method is recommended Number treated as Non-Detect 279
Minimum Non-Detect 0.00021 Minimum Non-Detect -8.468
SD of Detected 0.273 SD of Detected 2.022
Mean of Detected 0.0847 Mean of Detected -5.565
Maximum Detected 0.99 Maximum Detected -0.0101
Minimum Detected 0.00062 Minimum Detected -7.386
Raw Statistics Log-transformed Statistics
General Statistics
Number of Valid Data 279 Number of Detected Data 25
For additional insight, the user may want to consult a statistician.
Chemical (toluene)
99% KM (Chebyshev) UCL 0.0596
SD 0.0901 97.5% KM (Chebyshev) UCL 0.0405
k star 0.168
Median 0.0894 95% KM (Chebyshev) UCL 0.0308
95% KM (BCA) UCL 0.0163
Minimum 1E-12 95% KM (bootstrap t) UCL 0.307
Maximum 0.99
Gamma ROS Statistics using Extrapolated Data 95% KM (jackknife) UCL 0.0166
95% KM (t) UCL 0.0168
5% K-S Critical Value 0.192 SD 0.084
95% H-Stat (DL/2) UCL 0.00653
0.918
UCL Statistics
Observations < Largest ND are treated as NDs
Normal Distribution Test with Detected Values Only Lognormal Distribution Test with Detected Values Only
Shapiro Wilk Test Statistic 0.33 Shapiro Wilk Test Statistic 0.777
Maximum Non-Detect 500 Maximum Non-Detect 6.215
Percent Non-Detects 91.04%
Number of Distinct Detected Data 22 Number of Non-Detect Data 254
Page 36 of 42
ON-SITE SOILS (0-10 FEET BGS)
Note: Suggestions regarding the selection of a 95% UCL are provided to help the user to select the most appropriate 95% UCL.
These recommendations are based upon the results of the simulation studies summarized in Singh, Maichle, and Lee (2006).
95% KM (t) UCL
Note: DL/2 is not a recommended method.
95% Adjusted Gamma UCL 21.45
SD 13.2 97.5% KM (Chebyshev) UCL 2.426
Minimum 1E-12 95% KM (bootstrap t) UCL 1.608
Gamma ROS Statistics using Extrapolated Data 95% KM (jackknife) UCL 1.514
95% KM (z) UCL 1.516Assuming Gamma Distribution
95% KM (t) UCL 1.519
SE of Mean 0.198Data follow Appr. Gamma Distribution at 5% Significance Level
5% K-S Critical Value 0.176 SD 2.186
K-S Test Statistic 0.77 Mean 1.191
A-D Test Statistic 0.724 Nonparametric Statistics
5% A-D Critical Value 0.77 Kaplan-Meier (KM) Method
nu star 53.64
95% BCA Bootstrap UCL 1.319
95% Percentile Bootstrap UCL 1.246
95% t UCL 1.213
SD in Original Scale 2.301
Mean in Original Scale 0.874
SD in Log Scale 2.34
MLE yields a negative mean Mean in Log Scale -2.423
Log ROS Method
95% DL/2 (t) UCL 1.317 95% H-Stat (DL/2) UCL 0.808
SD 2.261 SD 1.016
Mean 0.984 Mean -0.93
Assuming Normal Distribution Assuming Lognormal Distribution
DL/2 Substitution Method DL/2 Substitution Method
Data not Normal at 5% Significance Level Data appear Lognormal at 5% Significance Level
5% Shapiro Wilk Critical Value 0.92 5% Shapiro Wilk Critical Value 0.92
Shapiro Wilk Test Statistic 0.794 Shapiro Wilk Test Statistic 0.933
UCL Statistics
Normal Distribution Test with Detected Values Only Lognormal Distribution Test with Detected Values Only
Maximum Non-Detect -0.693
Minimum Non-Detect 0.5 Minimum Non-Detect -0.693
Mean of Detected 3.836
Maximum Non-Detect 0.5
SD of Detected 3.89 SD of Detected 1.045
0.51 Minimum Detected -0.673
Maximum Detected 13 Maximum Detected 2.565
Number of Non-Detect Data 101Number of Distinct Detected Data 22
Number of Detected Data 26
General Statistics
Number of Valid Data 127
For additional insight, the user may want to consult a statistician.
Chemical (total cyanide)
These recommendations are based upon the results of the simulation studies summarized in Singh, Maichle, and Lee (2006).
95% Gamma Approximate UCL 21.4
1.519
Theta star 38.78
Nu star 110.6 Potential UCLs to Use
AppChi2 87.36
k star 0.436 99% KM (Chebyshev) UCL 3.159
95% KM (Chebyshev) UCL 2.053
Mean 16.89 95% KM (Percentile Bootstrap) UCL 1.558
Median 14.68
Maximum 41.74 95% KM (BCA) UCL 1.644
Gamma Distribution Test with Detected Values Only Data Distribution Test with Detected Values Only
Theta Star 3.719
k star (bias corrected) 1.032 Data Follow Appr. Gamma Distribution at 5% Significance Level
Maximum Likelihood Estimate(MLE) Method N/A
Mean of Detected 0.844
Percent Non-Detects 79.53%
Raw Statistics Log-transformed Statistics
Minimum Detected
Page 37 of 42
ON-SITE SOILS (0-10 FEET BGS)
For additional insight, the user may want to consult a statistician.
1715
Note: Suggestions regarding the selection of a 95% UCL are provided to help the user to select the most appropriate 95% UCL.
These recommendations are based upon the results of the simulation studies summarized in Singh, Maichle, and Lee (2006).
Note: DL/2 is not a recommended method.
95% Adjusted Gamma UCL 1718
Theta star 13752
Median 130 95% KM (Chebyshev) UCL 1636
Mean 1182 95% KM (Percentile Bootstrap) UCL 1134
95% KM (BCA) UCL 1106
95% KM (bootstrap t) UCL 1399Minimum 1E-12
Maximum 42000
95% KM (z) UCL 1090Assuming Gamma Distribution
Gamma ROS Statistics using Extrapolated Data 95% KM (jackknife) UCL 1090
SE of Mean 201.1Data not Gamma Distributed at 5% Significance Level
95% KM (t) UCL 1091
5% K-S Critical Value 0.0828 SD 3348
K-S Test Statistic 0.861 Mean 759.2
5% A-D Critical Value 0.861 Kaplan-Meier (KM) Method
A-D Test Statistic 5.488 Nonparametric Statistics
Theta Star 4273
nu star 98.82
Gamma Distribution Test with Detected Values Only Data Distribution Test with Detected Values Only
k star (bias corrected) 0.329 Data appear Lognormal at 5% Significance Level
95% BCA Bootstrap UCL
95% Percentile Bootstrap UCL 1089
95% t UCL 1089
MLE yields a negative mean Mean in Log Scale 2.652
SD in Log Scale 3.45
Maximum Likelihood Estimate(MLE) Method N/A Log ROS Method
95% DL/2 (t) UCL 1089 95% H-Stat (DL/2) UCL 1612
SD 3354 SD 2.662
Assuming Lognormal Distribution
Mean 757.8 Mean 3.221
Assuming Normal Distribution
DL/2 Substitution Method DL/2 Substitution Method
Data not Normal at 5% Significance Level Data appear Lognormal at 5% Significance Level
5% Lilliefors Critical Value 0.0723 5% Lilliefors Critical Value 0.0723
Lilliefors Test Statistic 0.377 Lilliefors Test Statistic 0.0715
UCL Statistics
Normal Distribution Test with Detected Values Only Lognormal Distribution Test with Detected Values Only
1.609
Maximum Non-Detect 5
Maximum Detected
Minimum Non-Detect 5 Minimum Non-Detect
Percent Non-Detects 46.24%
Number of Distinct Detected Data 109 Number of Non-Detect Data 129
General Statistics
Number of Valid Data 279 Number of Detected Data 150
Chemical (tph-d)
For additional insight, the user may want to consult a statistician.
Nu star 47.98 Potential UCLs to Use
AppChi2 33.08 97.5% KM (Chebyshev) UCL 2015
95% Gamma Approximate UCL
99% KM (Chebyshev) UCL 2760
SD 3426 97.5% KM (Chebyshev) UCL 2015
k star 0.086
1231
SD in Original Scale 3354
Mean in Original Scale 757.7
Maximum Non-Detect 1.609
Mean of Detected 1407 Mean of Detected 5.203
SD of Detected 4480 SD of Detected 2.159
10.65
Log-transformed Statistics
Minimum Detected 5.4 Minimum Detected 1.686
Raw Statistics
Maximum Detected 42000
Page 38 of 42
ON-SITE SOILS (0-10 FEET BGS)
428
95% Adjusted Gamma UCL 429.1
Theta star 5429
Median 1E-12 95% KM (Chebyshev) UCL 88.55
Mean 253.2 95% KM (Percentile Bootstrap) UCL 51.65
95% KM (BCA) UCL 50.98
95% KM (bootstrap t) UCL 104.5Minimum 1E-12
Maximum 2800
95% KM (z) UCL 49.78Assuming Gamma Distribution
Gamma ROS Statistics using Extrapolated Data 95% KM (jackknife) UCL 49.56
SE of Mean 14.29Data not Gamma Distributed at 5% Significance Level
95% KM (t) UCL 49.86
5% K-S Critical Value 0.167 SD 235.2
K-S Test Statistic 0.935 Mean 26.28
5% A-D Critical Value 0.935 Kaplan-Meier (KM) Method
A-D Test Statistic 4.163 Nonparametric Statistics
Theta Star 1463
nu star 10.01
Gamma Distribution Test with Detected Values Only Data Distribution Test with Detected Values Only
k star (bias corrected) 0.143 Data do not follow a Discernable Distribution (0.05)
95% BCA Bootstrap UCL
95% Percentile Bootstrap UCL 50.96
95% t UCL 49.66
MLE yields a negative mean Mean in Log Scale -5.197
SD in Log Scale 4.099
Maximum Likelihood Estimate(MLE) Method N/A Log ROS Method
95% DL/2 (t) UCL 49.77 95% H-Stat (DL/2) UCL 1.304
SD 235.6 SD 1.667
Assuming Lognormal Distribution
Mean 26.49 Mean -1.401
Assuming Normal Distribution
DL/2 Substitution Method DL/2 Substitution Method
Data not Normal at 5% Significance Level Data not Lognormal at 5% Significance Level
5% Shapiro Wilk Critical Value 0.934 5% Shapiro Wilk Critical Value 0.934
Shapiro Wilk Test Statistic 0.376 Shapiro Wilk Test Statistic 0.848
UCL Statistics
Normal Distribution Test with Detected Values Only Lognormal Distribution Test with Detected Values Only
Observations < Largest ND are treated as NDs Single DL Non-Detect Percentage 96.06%
Number treated as Detected 11
Number treated as Non-Detect 268Note: Data have multiple DLs - Use of KM Method is recommended
For all methods (except KM, DL/2, and ROS Methods),
Mean of Detected -0.41
SD of Detected 643.8 SD of Detected 3.916
Mean of Detected 209.2
Maximum Detected 7.937Maximum Detected 2800
Raw Statistics Log-transformed Statistics
Minimum Detected -4.343Minimum Detected 0.013
Percent Non-Detects 87.46%
Number of Distinct Detected Data 30 Number of Non-Detect Data 244
General Statistics
Number of Valid Data 279 Number of Detected Data 35
Chemical (tph-g)
Nu star 26.03 Potential UCLs to Use
AppChi2 15.4 97.5% KM (Chebyshev) UCL 115.5
95% Gamma Approximate UCL
99% KM (Chebyshev) UCL 168.4
SD 556.8 97.5% KM (Chebyshev) UCL 115.5
k star 0.0466
63.06
SD in Original Scale 235.6
Mean in Original Scale 26.38
1.609
Minimum Non-Detect 0.01 Minimum Non-Detect -4.605
Maximum Non-Detect 5 Maximum Non-Detect
Page 39 of 42
ON-SITE SOILS (0-10 FEET BGS)
Note: DL/2 is not a recommended method.
95% Adjusted Gamma UCL 5046
95% Gamma Approximate UCL 5037
Nu star 63.84 Potential UCLs to Use
AppChi2 46.46 95% KM (Chebyshev) UCL 2421
Theta star 32040
k star 0.114 99% KM (Chebyshev) UCL 3755
SD 5253 97.5% KM (Chebyshev) UCL 2871
Maximum 35000 95% KM (BCA) UCL 1806
Minimum 1E-12 95% KM (bootstrap t) UCL 1881
Gamma ROS Statistics using Extrapolated Data 95% KM (jackknife) UCL 1770
Assuming Gamma Distribution 95% KM (z) UCL 1773
Data not Gamma Distributed at 5% Significance Level SE of Mean 238.6
K-S Test Statistic 0.832 Mean 1381
nu star 118
95% BCA Bootstrap UCL 1869
95% t UCL 1772
95% Percentile Bootstrap UCL 1788
SD in Original Scale 3979
Mean in Original Scale 1379
Mean in Log Scale 3.969MLE yields a negative mean
SD in Log Scale 3.079
Maximum Likelihood Estimate(MLE) Method N/A Log ROS Method
95% DL/2 (t) UCL 1771 95% H-Stat (DL/2) UCL 2431
SD 2.389
Mean 4.432Mean 1377
SD 3979
Assuming Lognormal Distribution
DL/2 Substitution Method
Assuming Normal Distribution
DL/2 Substitution Method
Data not Lognormal at 5% Significance LevelData not Normal at 5% Significance Level
5% Lilliefors Critical Value 0.0768 5% Lilliefors Critical Value 0.0768
Maximum Non-Detect 25 Maximum Non-Detect 3.219
Mean of Detected 6.524
Minimum Non-Detect 25 Minimum Non-Detect 3.219
SD of Detected 5387
Maximum Detected 35000 Maximum Detected 10.46
Percent Non-Detects 52.33%
Number of Distinct Detected Data 98 Number of Non-Detect Data 146
General Statistics
Number of Valid Data 279 Number of Detected Data 133
For additional insight, the user may want to consult a statistician.
Chemical (tph-mo)
Note: Suggestions regarding the selection of a 95% UCL are provided to help the user to select the most appropriate 95% UCL.
These recommendations are based upon the results of the simulation studies summarized in Singh, Maichle, and Lee (2006).
Note: DL/2 is not a recommended method.
2421
Mean 3666 95% KM (Percentile Bootstrap) UCL 1788
Median 1121 95% KM (Chebyshev) UCL
95% KM (t) UCL 1775
5% K-S Critical Value 0.0862 SD 3971
Nonparametric Statistics
5% A-D Critical Value 0.832 Kaplan-Meier (KM) Method
A-D Test Statistic 2.795
Gamma Distribution Test with Detected Values Only Data Distribution Test with Detected Values Only
k star (bias corrected) 0.444 Data do not follow a Discernable Distribution (0.05)
Theta Star 6483
Lilliefors Test Statistic 0.0852
UCL Statistics
Normal Distribution Test with Detected Values Only Lognormal Distribution Test with Detected Values Only
Lilliefors Test Statistic 0.298
SD of Detected 1.894
Raw Statistics Log-transformed Statistics
Minimum Detected 19 Minimum Detected 2.944
Mean of Detected 2876
Page 40 of 42
ON-SITE SOILS (0-10 FEET BGS)
SD 56.68
Median 39.1 SD of log Data 0.616
Mean 56.05 Mean of log Data 3.789
Maximum 574 Maximum of Log Data 6.353
Raw Statistics Log-transformed Statistics
Minimum 12.7 Minimum of Log Data 2.542
Chemical (zinc)
Number of Valid Observations 243 Number of Distinct Observations 209
General Statistics
These recommendations are based upon the results of the simulation studies summarized in Singh, Singh, and Iaci (2002)
and Singh and Singh (2003). For additional insight, the user may want to consult a statistician.
Note: Suggestions regarding the selection of a 95% UCL are provided to help the user to select the most appropriate 95% UCL.
Potential UCL to Use Use 95% Student's-t UCL 34
or 95% Modified-t UCL
95% Adjusted Gamma UCL 33.72
95% Chebyshev(Mean, Sd) UCL 36.86Data not Gamma Distributed at 5% Significance Level
97.5% Chebyshev(Mean, Sd) UCL 38.84
95% BCA Bootstrap UCL 34.4
95% Percentile Bootstrap UCL 34.04Kolmogorov-Smirnov Test Statistic 0.0888
Kolmogorov-Smirnov 5% Critical Value 0.0588
Anderson-Darling 5% Critical Value 0.756 95% Hall's Bootstrap UCL 34.57
Anderson-Darling Test Statistic 3.721 95% Bootstrap-t UCL 34.38
95% Standard Bootstrap UCL 33.96
Adjusted Chi Square Value 2759 95% Jackknife UCL 34
Approximate Chi Square Value (.05) 2760 Nonparametric Statistics
Adjusted Level of Significance 0.049 95% CLT UCL 34
32.26
nu star 2883
Gamma Distribution Test Data Distribution
95% Modified-t UCL (Johnson-1978) 34.05 99% Chebyshev (MVUE) UCL 40.61
95% Chebyshev (MVUE) UCL 35.82 95% UCLs (Adjusted for Skewness)
95% Adjusted-CLT UCL (Chen-1995) 34.3 97.5% Chebyshev (MVUE) UCL 37.43
95% Student's-t UCL 34 95% H-UCL 33.59
Assuming Lognormal DistributionAssuming Normal Distribution
Data not Normal at 5% Significance Level Data not Lognormal at 5% Significance Level
Lilliefors Critical Value 0.0568 Lilliefors Critical Value 0.0568
Lilliefors Test Statistic 0.16 Lilliefors Test Statistic 0.0715
Relevant UCL Statistics
Normal Distribution Test Lognormal Distribution Test
Skewness 4.18
Coefficient of Variation 0.509
SD 16.42
Median 29.8 SD of log Data 0.401
Mean 32.26 Mean of log Data 3.388
Maximum 157 Maximum of Log Data 5.056
Raw Statistics Log-transformed Statistics
Minimum 7.8 Minimum of Log Data 2.054
For additional insight, the user may want to consult a statistician.
General Statistics
Number of Valid Observations 243 Number of Distinct Observations
These recommendations are based upon the results of the simulation studies summarized in Singh, Maichle, and Lee (2006).
Note: Suggestions regarding the selection of a 95% UCL are provided to help the user to select the most appropriate 95% UCL.
34.05
42.75
95% Approximate Gamma UCL 33.71
Assuming Gamma Distribution 99% Chebyshev(Mean, Sd) UCL
k star (bias corrected) 5.933 Data do not follow a Discernable Distribution (0.05)
Theta Star 5.438
MLE of Standard Deviation 13.25
MLE of Mean
184
Chemical (vanadium)
Page 41 of 42
ON-SITE SOILS (0-10 FEET BGS)
Note: Suggestions regarding the selection of a 95% UCL are provided to help the user to select the most appropriate 95% UCL.
These recommendations are based upon the results of the simulation studies summarized in Singh, Singh, and Iaci (2002)
and Singh and Singh (2003). For additional insight, the user may want to consult a statistician.
Potential UCL to Use Use 95% Chebyshev (Mean, Sd) UCL 71.9
95% Adjusted Gamma UCL 60.27
95% Approximate Gamma UCL 60.24
Data not Gamma Distributed at 5% Significance Level 95% Chebyshev(Mean, Sd) UCL 71.9
99% Chebyshev(Mean, Sd) UCL 92.23Assuming Gamma Distribution
97.5% Chebyshev(Mean, Sd) UCL 78.76
Kolmogorov-Smirnov 5% Critical Value 0.0593 95% BCA Bootstrap UCL 63.03
95% Bootstrap-t UCL 63.64
Kolmogorov-Smirnov Test Statistic 0.162 95% Percentile Bootstrap UCL 61.99
Anderson-Darling 5% Critical Value 0.765 95% Hall's Bootstrap UCL 64.93
Adjusted Chi Square Value 1008
Anderson-Darling Test Statistic 9.547
95% Standard Bootstrap UCL 62.13
Adjusted Level of Significance 0.049 95% CLT UCL 62.03
nu star 1084
Approximate Chi Square Value (.05) 1009
MLE of Mean 56.05
MLE of Standard Deviation 37.53
k star (bias corrected) 2.231 Data do not follow a Discernable Distribution (0.05)
Theta Star 25.12
Gamma Distribution Test Data Distribution
95% Modified-t UCL (Johnson-1978) 62.25 99% Chebyshev (MVUE) UCL 76.23
95% Chebyshev (MVUE) UCL 63.4 95% UCLs (Adjusted for Skewness)
95% Adjusted-CLT UCL (Chen-1995) 63.28 97.5% Chebyshev (MVUE) UCL 67.73
Assuming Normal Distribution Assuming Lognormal Distribution
95% Student's-t UCL 62.05 95% H-UCL 57.56
Data not Normal at 5% Significance Level Data not Lognormal at 5% Significance Level
Lilliefors Critical Value 0.0568 Lilliefors Critical Value 0.0568
Relevant UCL Statistics
Normal Distribution Test Lognormal Distribution Test
Lilliefors Test Statistic 0.234 Lilliefors Test Statistic 0.106
Skewness 5.013
Coefficient of Variation 1.011
95% Jackknife UCL 62.05
Nonparametric Statistics
Page 42 of 42
FINAL Human Health Risk Assessment June 2011 Former Lodi Manufactured Gas Plant Site
IRIS ENVIRONMENTAL
ATTACHMENT D
MODELING METHODOLOGIES
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D-1 IRIS ENVIRONMENTAL
ATTACHMENT D MODELING METHODOLOGIES
D.1 Introduction
The conceptual Site model for the former Lodi Manufactured Gas Plant site, located in Lodi, California (“the Site”), includes the inhalation of vapor-phase chemicals in indoor and outdoor air, and the inhalation of particulate-phase chemicals in outdoor air as potentially complete exposure pathways to be evaluated in the human health risk assessment (HRA). These exposure pathways require the transport of chemicals of potential concern (COPCs) from the impacted medium (soil gas or soil) to the exposure medium (indoor or outdoor air), where persons may be potentially exposed to the COPCs via the inhalation route. Given the presence of current off-site populations, as well as the presence of potential future on-site populations that may be exposed to Site-related chemicals, and the assumption of several potential exposure scenarios, there are three distinct transport pathways that involve the movement of COPCs from one medium to another:
1) transport of vapor-phase COPCs from on-site soil gas to on-site indoor air, where future on-site residential populations may be exposed;
2) transport of vapor-phase COPCs from on-site soil gas to on-site outdoor air where current off-site commercial and residential, and future on-site residential populations may be exposed; and
3) transport of particulate-phase COPCs from on-site soil to on-site outdoor air, where current off-site commercial and residential, and future on-site residential populations may be exposed.
Current off-site commercial and residential populations are conservatively assumed to work or reside directly at the boundaries of the Site and are assumed to be exposed to the predicted on-site outdoor vapor- and particulate-phase COPC concentrations. However, the concentrations to which off-site populations are potentially exposed would be lower than on-site concentrations due to dispersion.
To account for the outdoor air vapor inhalation exposure pathway in the development of soil risk-based screening concentrations (RBSCs) for volatile chemicals, a fourth distinct transport pathway that involves the transport of vapor-phase COPCs from on-site soil to on-site outdoor air, is also described in this Attachment.
This Attachment describes the methodologies employed to model the transport of chemicals from one medium to another for each of the transport pathways listed above.
The subsurface transport of a COPC is governed by soil and source properties and by the physicochemical properties of the chemical. Chemical properties that influence transport include its diffusivity in air, diffusivity in water, Henry’s law constant, solubility in water, and organic carbon partitioning coefficient. Physiochemical properties for COPCs in soil gas and their sources are documented in Table D-1. As Site-specific values were
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D-2 IRIS ENVIRONMENTAL
not available, default soil parameter values were conservatively used for modeling the transport of vapor-phase COPCs from on-site soil gas to on-site indoor and outdoor air, as presented in Table D-2.
D.2 Vapor-Phase Transport from On-site Soil Gas to On-site Indoor Air
Volatile chemicals present in the subsurface beneath the Site have the potential to volatilize from soils and migrate up through the soil column and into the indoor air space of buildings, where future on-site residents may be exposed via inhalation. This transport phenomenon is referred to as “vapor intrusion” and is discussed in Section 4.5.2 of the HRA.
The transport of a volatile chemical from soil gas to indoor air is represented by the attenuation coefficient, or alpha (α). By definition, the attenuation coefficient represents the ratio of the chemical concentration in indoor air (attributable to vapor intrusion) to the chemical concentration in soil gas beneath the building. Thus, the concentration of a volatile chemical in indoor air may be expressed as a function of the chemical concentration in soil gas and the attenuation coefficient:
αCC sgia ×= (Eq. D-1)
where:
Cia = chemical concentration in indoor air (µg/m3); and
Csg = chemical concentration in soil gas (µg/m3).
α = attenuation coefficient (unitless);
The transport of volatile COPCs from soil gas to indoor air was modeled using the USEPA-recommended Johnson & Ettinger Model for soil gas (SG-SCREEN Version 2.0), as modified by the California Environmental Protection Agency (Cal/EPA) Department of Toxic Substances Control (DTSC) (USEPA, 2004; Cal/EPA, 2009). As recommended by DTSC (Cal/EPA, 2005), soil gas, rather than soil data, were used to evaluate the vapor intrusion pathway, because soil gas data represent a direct measurement of the volatile chemical that has the potential to migrate into indoor air.
Inputs to the Johnson and Ettinger Model include: soil type and lithology, depth of soil gas contamination, physicochemical properties of the COPCs, and building parameters.
Physicochemical properties of the COPCs are presented in Table D-1; this table also presents corrected (to soil temperature) Henry’s Law constants and effective diffusivities of the COPCs, as calculated by the Johnson and Ettinger Model. Model default values for soil temperature, dry bulk density, total porosity, and water-filled porosity were used as soil input parameters and model defaults for building parameters were also used. The soil and building parameters used in the Johnson and Ettinger Model are summarized in Table D-2.
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Volatile chemicals detected in Site soil gas which were included in the Johnson & Ettinger Model analysis of the vapor intrusion pathway were:
• 1,1-Difluoroethane • 1,2,4-Trimethylbenzene • 1,3,5-Trimethylbenzene • 2-Butanone (MEK) • 2-Hexanone • 4-Ethyltoluene • Acetone • Benzene • Carbon disulfide • Isopropylbenzene (cumene) • Ethanol • Dichlorodifluoromethane (Freon 12) • Ethylbenzene • Heptane • Methyl tert-butyl ether (MTBE) • Naphthalene • Propylbenzene • Styrene • Tetrachloroethene • Toluene • Trichlorofluoromethane (Freon 11) • Trichloroethene • Total xylenes
For those VOCs detected in at least one Site soil gas sample, the maximum detected concentration at each sampled depth of each soil gas sampling location was input into the Johnson and Ettinger Model; for sampling locations where a VOC was not detected (but detected elsewhere), one-half the detection limit was input into the Model. In this way, worst-case concentrations of chemicals in the indoor air space of future on-site buildings and the maximum potential health risks to future on-site residents associated with inhalation exposure to the COPCs present in indoor air were estimated. Maximum risks were calculated for each location where detected VOCs were sampled in soil gas.
The attenuation factors estimated from the Johnson & Ettinger Model for the residential scenario are provided in Table D-3 and the chemical concentrations in indoor air for soil gas COPCs are presented in Table 23 of the HRA for the future onsite residential scenario.
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D.3 Vapor-Phase Transport from On-site Soil Gas to On-site Outdoor Air
Volatile chemicals present in the subsurface beneath the Site have the potential to volatilize from soils and migrate up through the soil column and into outdoor air, where current off-site and future on-site populations may be exposed via inhalation. As with indoor air, it is preferable to estimate the transport of vapor-phase chemicals from the subsurface to outdoor air using soil gas data (rather than soil or groundwater data), as soil gas data represent the most direct measurement of the contaminants that may potentially migrate to outdoor air; this preferred approach was used in estimating outdoor vapor exposures for all receptors. This transport of on-site soil gas to on-site outdoor air is similar to vapor intrusion, described above in Section D.2, except the chemicals are emitted and dispersed into outdoor air rather than indoor air. COPCs for the soil gas-to-outdoor air pathway are the same as those defined above in Section D.2.
The transport of a volatile chemical from soil gas to outdoor air is represented by the transfer factor (TF). Analogous to the attenuation factor, discussed above, the transfer factor represents the ratio of the chemical concentration in outdoor air (attributable to transport from soil gas) to the chemical concentration in soil gas. Thus, the concentration of a volatile chemical in outdoor air may be expressed as a function of the chemical concentration in soil gas and the transfer factor:
TFCC SGOA ×= (Eq. D-2)
where:
COA = chemical concentration in outdoor air (µg/m3);
CSG = chemical concentration in soil gas (µg/m3); and
TF = transfer factor (unitless).
As described in the following sections below, the transfer factor incorporates two distinct processes: the diffusive transport of volatile chemicals from soil gas to the ground surface; and the dispersion of volatile chemicals from the ground surface into the ambient air. The transfer factors estimated for COPCs in soil gas are provided in Table D-5 and the chemical concentration in outdoor air for soil gas COPCs are presented in Tables 21 and 22 of the HRA for residential and commercial scenarios, respectively.
For those VOCs detected in at least one Site soil gas sample, the maximum detected concentration at each of the soil gas sampling locations was input into the soil gas to outdoor air transport model described below; for sampling locations where a VOC was not detected (but detected elsewhere), one-half the detection limit was input into the model. Estimates of the worst-case concentrations of chemicals in the outdoor air at each location across the Site were thus calculated. Then, the average total risks from the inhalation of VOC vapors in outdoor air from all soil gas sources across the Site was calculated by averaging the maximum risks for all detected VOCs in soil gas from each location across the Site.
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D-5 IRIS ENVIRONMENTAL
D.3.1 Transfer Factor Methodology
The transfer factor incorporates two distinct processes: the diffusive transport (i.e., flux) of volatile chemicals from at-depth soil gas to the ground surface; and the dispersion of volatile chemicals from the ground surface into the ambient air. The steady-state diffusive flux of each COPC from soil gas to the ground surface was estimated using the approach recommended in Standard Guide for Risk-based Corrective Action Applied at Petroleum Release Sites (ASTM, 1995):
CF2CF1d
CDQ SGeffV
ss ×××
= (Eq. D-3)
where:
Qss = steady state flux from subsurface vapor source (g/m2/s);
CSG = chemical concentration in soil gas (µg/m3);
DeffV = vadose zone effective diffusion coefficient (cm2/s);
d = depth of soil gas sample (m);
CF1 = area conversion factor, 10-4 m2/cm2; and
CF2 = mass conversion factor, 103 g/kg.
This flux model requires that there are no non-aqueous phase liquids (NAPLs) present. If this model were used to estimate the flux of NAPLs, the flux would be overestimated. The presence of NAPLs has not been identified at the Site in the areas where soil gas samples were collected.
The concentration of each COPC in outdoor air was modeled using the “Q over C” dispersion-factor approach recommended in the Supplemental Guidance for Developing Soil Screening Levels for Superfund Sites (USEPA, 2002):
vol
ssOA (Q/C)
QC = (Eq. D-4)
where:
(Q/C)vol = dispersion factor for volatiles (g/m2/s per kg/m3).
Combining Equations D-2, D-3, and D-4 yields:
g/kg10/cmm10Q/C)(d
DTF 3224
vol
effV ×××
= − (Eq. D-5)
The dispersion factor [(Q/C)vol] represents the reciprocal of the ratio of the annual-average geometric mean air concentration at the center of a square source area to the
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D-6 IRIS ENVIRONMENTAL
emission flux from that source area. The dispersion factor for the Site was estimated as recommended in the Supplemental Guidance for Developing Soil Screening Levels for Superfund Sites (USEPA, 2002). The dispersion factor is a function of the source area and of empirical coefficients which are based on air dispersion modeling for specific climate zones (USEPA, 2002). The source area used to estimate the dispersion factor was the Site area of 0.73 acres. Default dispersion coefficients specific to the Site region (San Francisco area) were used (USEPA, 2002). Calculation of the dispersion factor is documented in Table D-4.
D.4 Particulate-Phase Transport from On-site Soil to On-site Outdoor Air
Non-volatile chemicals present in onsite soils (i.e., adhered to soil particles) have the potential to be emitted into the ambient air via wind erosion of impacted soils, where current off-site commercial workers, current off-site residents, or future on-site residents may be exposed via inhalation. As presented in Tables 7 and 8 of the HRA, COPCs for the soil-to-outdoor air pathway include as many as: 5 volatile chemicals; 18 polycyclic aromatic hydrocarbons (PAHs); and 17 inorganics.
The transport of particulate-phase chemicals from soil to outdoor air is represented by the particulate emission factor (PEF). The particulate emission factor represents the ratio of the chemical concentration in soil to the chemical concentration in outdoor air (attributable to transport from soil). Thus, the particulate-phase concentration of a chemical in outdoor air may be expressed as a function of the chemical concentration in soil and the particulate emission factor:
PEF1CC SpOA, ×= (Eq. D-6)
where:
COA,p = particulate-phase chemical concentration in outdoor air (mg/m3);
CS = chemical concentration in soil (mg/kg); and
PEF = particulate emission factor (m3/kg).
As defined, the particulate emission factor is effectively equal to the reciprocal of the dust concentration in air. Unlike the attenuation factor and transfer factor discussed above, the particulate emission factor is not chemical-specific. The particulate emission factor incorporates two distinct processes: the wind erosion of impacted particulate matter (i.e., dust) from the ground surface, and the dispersion of the particulate matter into the ambient air. The particulate emission factor for the Site was estimated using the approach recommended in the Supplemental Guidance for Developing Soil Screening Levels for Superfund Sites (USEPA, 2002). The flux of impacted particulate matter from the ground surface was estimated using USEPA-recommended default values for all input parameters. The dispersion of particulate matter into onsite outdoor air was estimated using a site-specific particulate matter dispersion factor [(Q/C)wind], analogous to the
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D-7 IRIS ENVIRONMENTAL
volatile dispersion factor discussed above. Calculation of the particulate emission factor is documented in Table D-6 and predicted particulate-phase chemical concentrations in outdoor air for COPCs in soils are presented in Tables 7 and 8 of the HRA for exposed soils (0-0.5 feet bgs) and on-site soils (0-10 feet bgs), respectively.
D.5 Vapor-Phase Transport from On-site Soil to On-site Outdoor Air
To develop a multi-pathway RBSC for volatile chemicals detected in soil, the transport of vapor-phase COPCs in on-site soils to on-site outdoor air needs to be predicted. The transport of volatile COPCs from soil to outdoor air was modeled as two distinct processes: the volatilization of chemicals from soil to the ground surface, and the dispersion of the chemicals from the ground surface into the ambient air. These two distinct processes are described further below.
D.6.1 Volatilization Flux Methodology
The transport of volatile COPCs from soil into outdoor air was modeled using the approach recommended in the USEPA soil screening guidance (USEPA, 1996) for infinite sources:
Ab
22-41/2Avol
Dρ 2)/cm(m 10 T) D (3.14Q/CVF
××××××
= (Eq. D-7)
where:
TSawb
2w
10/3wi
10/3a
A H'θ+ θ + Kdρ )]/ηD(θ + )H' D[(θD =
And where:
VF = volatilization factor (m3/kg);
Q/Cvol = dispersion factor (g/m2/s per kg/m3);
T = exposure interval (based on exposure duration) (s);
ρb = dry soil bulk density (g/cm3);
η = total soil porosity (cm3pore/cm3soil);
ρb = dry soil bulk density (g/cm3);
θa = air-filled soil porosity (cm3air/cm3soil - calculated, η-θw);
θw = water-filled soil porosity (cm3water/cm3soil);
Di = diffusivity in air (chemical-specific, cm2/s);
H’ = Henry's Law Constant (chemical-specific, unitless);
Dw = diffusivity in water (chemical-specific, cm2/s); and
Kd = soil-water partition coefficient (chemical specific, g/cm3);
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D-8 IRIS ENVIRONMENTAL
where:
Kd = Koc x foc
And where:
Koc = soil organic carbon partition coefficient (chemical-specific, g/cm3); and
foc = fraction organic carbon in soil (g/g);
For mass-limited sources, the following equation is used to model transport of volatile COPCs from soil into outdoor air:
224sb
vol
/mcm10dρTQ/CVF
×××
= (Eq. D-8)
where:
VF = volatilization factor (m3/kg);
Q/Cvol = dispersion factor (g/m2/s per kg/m3);
T = exposure interval (based on exposure duration) (s);
ρb = dry soil bulk density (g/cm3); and
ds = average source depth (Site-specific) (cm).
The dispersion factor [(Q/C)vol] represents the reciprocal of the ratio of the annual-average geometric mean air concentration at the center of a square source area to the emission flux from that source area and is the same volatile dispersion factor discussed in Section D.3.1 above.
USEPA-recommended conservative default values were used in calculating the volatilization factor; these input parameters are presented in Table D-7. Table D-8 presents the infinite source VF for volatile compounds in on-site soils for the future residential scenario. The infinite source assumption VF is used in the development of soil RBSCs for volatile chemicals. Example calculations of the VF for naphthalene for the future residential scenario are provided in Attachment F.
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D.7 References
American Society for Testing and Materials (ASTM). 1995. Standard Guide for Risk-Based Corrective Action Applied at Petroleum Release Sites. Designation: E 1739-95.
Cal/EPA. 2009. Johnson and Ettinger SG-SCREEN Model, EPA Version 2.0, dated April 2003, as modified by DTSC February 4.
Cal/EPA. 2005. Guidance for the Evaluation and Mitigation of Subsurface Vapor Intrusion to Indoor Air. Department of Toxic Substances Control. Interim Final. February 2.
USEPA. 2004. User’s Guide for Evaluating Subsurface Vapor Intrusion into Buildings. Office of Emergency and Remedial Response Washington, D.C. Revised February 22, 2004.
USEPA. 2002. Supplemental Guidance for Developing Soil Screening Levels for Superfund Sites. Office of Solid Waste and Emergency Response. Washington, D.C. OSWER/9355.4-24. December.
USEPA. 1996. Soil Screening Guidance: User’s Guide. Office of Solid Waste and Emergency Response. Washington, D.C. EPA/540/R-96/018. July.
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ATTACHMENT D
TABLES
Volatile Organic Compounds
1,1-Difluoroethane 1.0E-01 2 1.2E-05 2 2.0E-02 2 8.3E-01 2 NONE 1 NONE 1 NONE 1 NONE J&E 2.0E-02 J&E 8.3E-01 J&E 8.0E-03 J&E
1,2,4-Trimethylbenzene 6.1E-02 1 7.9E-06 1 6.1E-03 1 2.5E-01 1 9.4E+03 1 4.4E+02 1 6.5E+02 1 1.2E+04 J&E 5.8E-03 J&E 2.4E-01 J&E 4.7E-03 J&E
1,3,5-Trimethylbenzene 6.0E-02 1 8.7E-06 1 5.9E-03 1 2.4E-01 1 9.3E+03 1 4.4E+02 2 6.4E+02 1 1.1E+04 J&E 5.5E-03 J&E 2.3E-01 J&E 4.7E-03 J&E
2-Butanone (Methyl Ethyl Ketone 8.1E-02 1 9.8E-06 1 5.6E-05 1 2.3E-03 1 7.5E+03 3.5E+02 1 5.4E+02 8.2E+03 J&E 5.3E-05 J&E 2.2E-03 J&E 6.3E-03 J&E
2-Hexanone 7.0E-02 2 8.4E-06 2 9.3E-05 2 3.8E-03 2 NONE 1 4.0E+02 2 NONE 1 NONE J&E 9.3E-05 J&E 3.8E-03 J&E 5.5E-03 J&E
4-Ethyltoluene 6.8E-02 3 7.8E-06 4 5.0E-03 3 2.1E-01 3 NONE 1 4.3E+02 1 NONE 1 NONE J&E 5.0E-03 J&E 2.1E-01 J&E 5.3E-03 J&E
Acetone 1.2E-01 1 1.1E-05 1 3.9E-05 1 1.6E-03 1 7.0E+03 1 3.3E+02 1 5.1E+02 1 7.4E+03 J&E 3.7E-05 J&E 1.5E-03 J&E 9.7E-03 J&E
Benzene 8.8E-02 1 9.8E-06 1 5.5E-03 1 2.3E-01 1 7.3E+03 1 3.5E+02 1 5.6E+02 1 8.0E+03 J&E 5.3E-03 J&E 2.2E-01 J&E 6.9E-03 J&E
Carbon Disulfide 1.0E-01 1 1.0E-05 1 3.0E-02 1 1.2E+00 1 6.4E+03 1 3.2E+02 1 5.5E+02 1 6.6E+03 J&E 2.9E-02 J&E 1.2E+00 J&E 8.1E-03 J&E
Cumene 6.5E-02 1 7.1E-06 1 1.2E+00 1 4.7E+01 1 1.0E+04 1 4.3E+02 1 6.3E+02 1 1.2E+04 J&E 1.1E+00 J&E 4.4E+01 J&E 5.1E-03 J&E
Ethanol 1.2E-01 3 1.3E-05 4 5.0E-06 3 2.1E-04 3 NONE 1 3.5E+02 1 NONE 1 NONE J&E 5.0E-06 J&E 2.1E-04 J&E 1.0E-02 J&E
Ethylbenzene 7.5E-02 1 7.8E-06 1 7.9E-03 1 3.2E-01 1 8.5E+03 1 4.1E+02 2 6.2E+02 1 1.0E+04 J&E 7.4E-03 J&E 3.0E-01 J&E 5.9E-03 J&E
Freon 11 8.7E-02 1 9.7E-06 1 9.7E-02 1 4.0E+00 1 6.0E+03 1 3.0E+02 1 4.7E+02 1 6.0E+03 J&E 9.4E-02 J&E 3.8E+00 J&E 6.8E-03 J&E
Freon 12 6.7E-02 1 9.9E-06 1 3.4E-01 1 1.4E+01 1 9.4E+03 1 2.4E+02 1 3.8E+02 1 8.0E+03 J&E 3.3E-01 J&E 1.3E+01 J&E 5.2E-03 J&E
Heptane 7.0E-02 3 7.6E-06 4 2.0E+00 3 8.2E+01 3 NONE 1 3.7E+02 1 NONE 1 NONE J&E 2.0E+00 J&E 8.2E+01 J&E 5.5E-03 J&E
Methyl tert-butyl ether 1.0E-01 1 1.1E-05 1 6.2E-04 1 2.6E-02 1 6.7E+03 1 3.3E+02 1 5.0E+02 1 7.1E+03 J&E 6.0E-04 J&E 2.5E-02 J&E 8.0E-03 J&E
Naphthalene 5.9E-02 1 7.5E-06 1 4.8E-04 1 2.0E-02 1 1.0E+04 1 4.9E+02 1 7.5E+02 1 1.3E+04 J&E 4.5E-04 J&E 1.8E-02 J&E 4.6E-03 J&E
Propylbenzene 6.0E-02 1 7.8E-06 1 1.1E-02 1 4.4E-01 1 9.1E+03 1 4.3E+02 1 6.3E+02 1 1.1E+04 J&E 1.0E-02 J&E 4.1E-01 J&E 4.7E-03 J&E
Styrene 7.1E-02 1 8.0E-06 1 2.7E-03 1 1.1E-01 1 8.7E+03 1 4.2E+02 1 6.4E+02 1 1.0E+04 J&E 2.6E-03 J&E 1.1E-01 J&E 5.5E-03 J&E
Tetrachloroethene 7.2E-02 1 8.2E-06 1 1.8E-02 1 7.5E-01 1 8.3E+03 1 3.9E+02 1 6.2E+02 1 9.4E+03 J&E 1.7E-02 J&E 7.1E-01 J&E 5.6E-03 J&E
Toluene 8.7E-02 1 8.6E-06 1 6.6E-03 1 2.7E-01 1 7.9E+03 1 3.8E+02 1 5.9E+02 1 9.0E+03 J&E 6.3E-03 J&E 2.6E-01 J&E 6.8E-03 J&E
Trichloroethene 7.9E-02 1 9.1E-06 1 1.0E-02 1 4.2E-01 1 7.5E+03 1 3.6E+02 1 5.4E+02 1 8.4E+03 J&E 9.8E-03 J&E 4.0E-01 J&E 6.2E-03 J&E
Total Xylenes 8.5E-02 2 9.9E-06 2 5.2E-03 2 2.1E-01 2 8.7E+03 1 4.2E+02 1 6.3E+02 1 1.0E+04 J&E 4.9E-03 J&E 2.0E-01 J&E 6.6E-03 J&E
References:1. USEPA. 2004. User's Guide for Evaluating Subsurface Vapor Intrusion Into Buildings . Office of Emergency and Remedial Response. Washington, D.C. February 22. Available at: http://www.epa.gov/oswer/riskassessment/airmodel/pdf/2004_0222_3phase_users_guide.pdf2. SRC PhysProp Database. 2002. found at http://esc.syrres.com/interkow/physdemo.htm and methods from Schwarzenback R. P. et al. 1993. Environmental Organic Chemistry. John Wiley and Sons, Inc., New York, NY.
TABLE D-1PHYSICOCHEMICAL PROPERTIES
Former Lodi Manufactured Gas PlantLodi, California
Diffusivity in air, Da
(cm2/s)
Diffusivity in water,
Dw
(cm2/s)
Henry's Law Constant at Reference
Temperature (25° C),H
(atm-m3/mol)
Critical Temperature,
TC
(K)
Dimensionless Henry's Law Constant at Reference
Temperature, H'
(unitless)
Vadose Zone Effective Diffusion
Coefficient, DeffV
(cm2/s)
Dimensionless Henry's Law Constant at Reference
Temperature, H'TS
(unitless)
Henry's Law Constant at Average Soil
Temperature, HTS
(atm-m3/mol)
Enthalpy of Vaporization at
Average Soil Temperature,
DHv,TS
(cal/mol)
Enthalpy of Vaporization at
the Normal Boiling Point,
DHv,b
(cal/mol)
Normal Boiling Point,
TB
(K)
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TABLE D-1PHYSICOCHEMICAL PROPERTIES
Former Lodi Manufactured Gas PlantLodi, California
References:
3. USEPA. 2006. Water9, Version 3. June 29. URL: http://www.epa.gov/ttn/chief/software/water/water9_3.4. United States Environmental Protection Agency (USEPA). 2010. FromUSEPA Regional Screening Levels for Chemical Contaminants at Superfund Sites , December, 2009. Available at: http://www.epa.gov/reg3hwmd/risk/human/rb-concentration_table/Generic_Tables/pdf/composite_sl_table_run_DECEMBER2009.pdf5. Regional Water Quality Control Board (RWQCB). 2008. Risked Based Screening Levels. Table J. Physio-chemical and Toxicity Constants used in Models. May.J&E = Calculated by Johnson & Ettinger model
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Parameter Symbol Residential Units Reference
Building Properties
Depth below grade to bottom of enclosed space floor LF 15 cm DTSC/HERD default (Cal/EPA, 2009)
Building height H 244 cm DTSC/HERD default (Cal/EPA, 2009)
Building area Ab 1.0E+06 cm2 DTSC/HERD default (Cal/EPA, 2009)
Area of enclosed space below grade Ab,sg 1.0E+06 cm2 DTSC/HERD default (Cal/EPA, 2009)
Building air exchange rate AXRb 0.5 hr-1 OEHHA default (Cal/EPA, 2005)
Vapor flow rate into building Qsoil 5 L/min DTSC/HERD default (Cal/EPA, 2009)
Soil Properties
Average soil temperature Ts 24 oC DTSC/HERD default (Cal/EPA, 2009)
SCS soil type Default –Dry bulk density ρb 1.5 g/cm3 Default (USEPA, 2004)
Total porosity η 0.43 cm3/cm3 Default (USEPA, 2004)
Water-filled porosity θw 0.15 cm3/cm3 DTSC/HERD default (Cal/EPA, 2009)
References:Cal/EPA. 2009. Johnson and Ettinger SG-SCREEN Model, EPA Version 2.0, dated April 2003, as modified by DTSC February 4.Cal/EPA. 2005. Guidance for the Evaluation and Mitigation of Subsurface Vapor Intrusion to Indoor Air. Department of Toxic Substances Control. Interim Final. February 2.USEPA. 2004. User’s Guide for Evaluating Subsurface Vapor Intrusion into Buildings. Office of Emergency and Remedial Response Washington, D.C.
TABLE D-2JOHNSON AND ETTINGER MODEL INPUT DATA
Former Lodi Manufactured Gas PlantLodi, California
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Attenuation Factor at 5 ft bgs
Attenuation Factor at 8 ft bgs
Residential Residential
1,1-Difluoroethane 1.0E-03 7.3E-04
1,2,4-Trimethylbenzene 7.2E-04 4.9E-04
1,3,5-Trimethylbenzene 7.2E-04 4.9E-04
2-Butanone (Methyl Ethyl Ketone) 8.8E-04 6.1E-04
2-Hexanone 8.0E-04 5.5E-04
4-Ethyltoluene 7.8E-04 5.4E-04
Acetone 1.1E-03 8.3E-04
Benzene 9.2E-04 6.5E-04
Carbon Disulfide 1.0E-03 7.3E-04
Cumene 7.6E-04 5.2E-04
Ethanol 1.2E-03 8.6E-04
Ethylbenzene 8.3E-04 5.8E-04
Freon 11 9.2E-04 6.5E-04
Freon 12 7.7E-04 5.3E-04
Heptane 8.0E-04 5.5E-04
Methyl tert-butyl ether 1.0E-03 7.3E-04
Naphthalene 7.1E-04 4.8E-04
Propylbenzene 7.2E-04 4.9E-04
Styrene 8.0E-04 5.5E-04
Tetrachloroethene 8.1E-04 5.6E-04
Toluene 9.2E-04 6.5E-04
Trichloroethene 8.6E-04 6.0E-04
Total Xylenes 9.0E-04 6.3E-04
Notes:
1
α = CIA / CSG
where CIA is the chemical concentration in indoor air and CSG is the chemical concentration in soil gas.
2
References:
TABLE D-3ATTENUATION FACTORS
Former Lodi Manufactured Gas PlantLodi, California
VOCs
Chemical of Potential Concern
Attenuation factors at depth are calculated with the USEPA-recommended Johnson & Ettinger Model for soil gas(SG-SCREEN Version 2.0), as modified by DTSC/HERD (Johnson and Ettinger, 1991; USEPA, 2004; Cal/EPA, 2009), and as modified by Iris Environmental.
By definition, the attenuation factor (α) is the ratio of the chemical concentration in indoor air to the chemical concentration in soil gas beneath the building:
Cal/EPA. 2009. Johnson and Ettinger SG-SCREEN Model, EPA Version 2.0, dated April 2003, as modified by DTSC February 4.Johnson, P.C, and R.A. Ettinger. 1991. Heuristic model for predicting the intrusion rate of contaminant vapors in buildings. Environ. Sci. Technol. 25: 1445-1452.USEPA. 2004. User’s Guide for Evaluating Subsurface Vapor Intrusion into Buildings. Office of Emergency and Remedial Response Washington, D.C. Revised February 22, 2004.
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Q/Cvol = A exp[(ln Asite - B)2 (1/C)] = 82.72 (g/m2-s) / (kg/m3)where:
Asite 0.73 acres areal extent of the SiteLocation SF -- General location (USEPA 2002)A 13.8139 -- constant, default value presented in Exhibit D-3 (USEPA 2002)B 20.1624 -- constant, default value presented in Exhibit D-3 (USEPA 2002)C 234.2869 -- constant, default value presented in Exhibit D-3 (USEPA 2002)
References:USEPA. 2002. Supplemental Guidance for Developing Soil Screening Levels for Superfund Sites. Office of Solid Waste and Emergency Response. Washington, D.C., December.
Site-specific Dispersion Factor for Volatiles (USEPA 2002, Equation D-1)
TABLE D-4DISPERSION FACTOR CALCULATION FOR VOLATILE COMPOUNDS
Former Lodi Manufactured Gas PlantLodi, California
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Chemical of Potential ConcernTransfer Factor
at 5 ft bgsTransfer Factor
at 8 ft bgs
1,1-Difluoroethane 6.3E-06 3.9E-06
1,2,4-Trimethylbenzene 3.7E-06 2.3E-06
1,3,5-Trimethylbenzene 3.7E-06 2.3E-06
2-Butanone (Methyl Ethyl Ketone) 5.0E-06 3.1E-06
2-Hexanone 4.4E-06 2.7E-06
4-Ethyltoluene 4.2E-06 2.6E-06
Acetone 7.7E-06 4.8E-06
Benzene 5.4E-06 3.4E-06
Carbon Disulfide 6.4E-06 4.0E-06
Cumene 4.0E-06 2.5E-06
Ethanol 8.1E-06 5.0E-06
Ethylbenzene 4.6E-06 2.9E-06
Freon 11 5.4E-06 3.4E-06
Freon 12 4.1E-06 2.6E-06
Heptane 4.3E-06 2.7E-06
Methyl tert-butyl ether 6.3E-06 3.9E-06
Naphthalene 3.6E-06 2.3E-06
Propylbenzene 3.7E-06 2.3E-06
Styrene 4.4E-06 2.7E-06
Tetrachloroethene 4.4E-06 2.8E-06
Toluene 5.4E-06 3.4E-06
Trichloroethene 4.9E-06 3.0E-06
Total Xylenes 5.2E-06 3.3E-06
Notes:1 The methodology used in the calculation of transfer factors, the ratios of the chemical
concentration in outdoor air to the chemical concentration in soil gas, is presented in the text of Attachment D.
Volatile Organic Compounds
TABLE D-5TRANSFER FACTORS FROM SOIL GAS TO AMBIENT AIR
Former Lodi Manufactured Gas PlantLodi, California
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PEF (m3/kg) = = 1.2E+09 m3/kg0.036 x (1-V) x (Um/Ut)
3 x F(x)where:
Q/Cwind 82.72 (g/m2-s) / (kg/m3) dispersion factor (calculated, see below)V 0.5 unitless fraction veg. cover (default from USEPA 2002)Um 4.69 m/s mean annual windspeed (default from USEPA 2002)Ut 11.32 m/s threshold value of windspeed at 7 m (default from USEPA 2002)F(x) 0.194 unitless function dependent on Um/Ut (default from USEPA 2002)
Q/Cwind = A exp[(ln Asite - B)2 (1/C)] = 82.72 (g/m2-s) / (kg/m3)where:
Asite 0.73 acres areal extent of the SiteLocation SF -- General location (USEPA 2002)A 13.8139 -- constant, default value presented in Exhibit D-2 (USEPA 2002)B 20.1624 -- constant, default value presented in Exhibit D-2 (USEPA 2002)C 234.2869 -- constant, default value presented in Exhibit D-2 (USEPA 2002)
References:USEPA. 2002. Supplemental Guidance for Developing Soil Screening Levels for Superfund Sites. Office of Solid Waste and Emergency Response. Washington, D.C., December.
Particulate Emission Factor (PEF), (USEPA 2002, Equation 4-5)Q/C x 3600 s/h
Site-specific Dispersion Factor for Particulates (USEPA 2002, Equation D-1)
TABLE D-6PARTICULATE EMISSION FACTOR CALCULATION
Former Lodi Manufactured Gas PlantLodi, California
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TABLE D-7VOLATILIZATION FACTOR EQUATIONS AND SAMPLE CALCULATIONS
Former Lodi Manufactured Gas PlantLodi, California
VF = Q/Cvol x (3.14 x DA x T)1/2 x 10-4 (m2/cm2) = 7.0E+04 m3/kg Consistent with USEPA 1996, 2 x ρb x DA the larger VF is used to evaluate
where: air concentrations.DA = [(θa
3.33DiH') + (θw3.33Dw)]/η2
ρbKd + θw +θaH'and:
DA 4.66E-06 cm2/s apparent diffusivity (calculated using equation cited above)Q/Cvol 8.27E+01 (g/m2-s) / (kg/m3) dispersion factor (calculated, see below)T 9.46E+08 s exposure interval (based on exposure duration of 30 year)ρb 1.50 g/cm3 dry soil bulk density (default)η 0.43 cm3
pore/cm3soil total soil porosity (default)
θw 0.15 cm3water/cm3
soil water-filled soil porosity (default)θa 0.28 cm3
air/cm3soil air-filled soil porosity (calculated, n-θw)
Di 0.059 cm2/s diffusivity in air (chemical-specific, see Table 14 of HRA)H’ 1.8E-02 unitless
Dw 7.5E-06 cm2/s
Kd =Koc x foc 12 cm3/g
Koc 2000 cm3/gfoc 0.006 g/g
Q/Cvol = A exp[(ln Asite - B)2 (1/C)] = 82.72 (g/m2-s) / (kg/m3)where:
Asite 0.73 acres areal extent of the SiteLocation San Francisco -- General location (USEPA 2002)A 13.8 -- constant, default value presented Exhibit D-2 (USEPA 2002)B 20.2 -- constant, default value presented Exhibit D-2 (USEPA 2002)C 234.3 -- constant, default value presented Exhibit D-2 (USEPA 2002)
References:U.S. Environmental Protection Agency (USEPA). 1996. Soil Screening Guidance: User’s Guide . Office of Solid Waste and Emergency Response. EPA/540/R-96/018. July.USEPA. 2002. Supplemental Guidance for Developing Soil Screening Levels for Superfund Sites. Office of Soild Waste and Emergency Response. Washington, D.C., December.
diffusivity in water (chemical-specific, value in Table 14 of HRA adjusted for temperature)
Equation for Dispersion Factor for Volatile Compounds (Equation D-1, USEPA 2002) Future Residential Scenario
Outdoor Air Volatilization Factor (VF) Calculated for Naphthalene, (USEPA 2002, Equation 4-8) Future Residential Scenario
Henry's Law Constant (chemical-specific, see Table 14 of HRA)
soil-water partition coefficient (chemical specific, see Table 14 of HRA)soil organic carbon partition coefficient (chemical-specific, see Table 14 of HRA)fraction organic carbon in soil (default)
PGE_Lodi_J&E Page 1 of 1 IRIS ENVIRONMENTAL
Chemicals
Infinite SourceVolatilization Factor
(m3/kg)
1-Methylnaphthalene 7.7E+042-Methylnaphthalene 8.5E+04Acenaphthene 2.7E+05Benzene 6.8E+03Ethylbenzene 6.8E+03Naphthalene 7.0E+04Toluene 6.8E+03m,p-Xylene 6.9E+03o-Xylene 7.6E+03
Future On-site Resident Scenario
Lodi, California
TABLE D-8SOIL TO OUTDOOR AIR
VOLATILIZATION FACTORFormer Lodi Manufactured Gas Plant
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FINAL Human Health Risk Assessment June 2011 Former Lodi Manufactured Gas Plant Site
IRIS ENVIRONMENTAL
ATTACHMENT E
UNCERTAINTIES IN THE RISK ASSESSMENT
FINAL Human Health Risk Assessment June 2011 Former Lodi Manufactured Gas Plant Site
E-1 IRIS ENVIRONMENTAL
ATTACHMENT E UNCERTAINTIES IN THE RISK ASSESSMENT
E.1 Introduction
Risk assessment includes several uncertainties that warrant discussion. Many of the assumptions used in this human health risk assessment (HRA) regarding the representativeness of the sampling data, human exposures, fate and transport modeling, and chemical toxicity are conservative, following agency guidance, and reflect a 90th or 95th percentile value, rather than a typical or average value. The use of several conservative exposure and toxicity assumptions can introduce considerable uncertainty into the risk assessment. By using conservative exposure or toxicity estimates, the assessment can develop a significant conservative bias that may result in the calculation of significantly higher cancer risk or noncancer hazard than is actually posed by the chemicals present in soils and soil gas at the Former Lodi Manufactured Gas Plant Site (the “Site”). A discussion of the key uncertainties used in this evaluation for the Site is discussed below.
E.2 Uncertainties in the Exposure Assumptions
As described below, numerous assumptions must be made in order to estimate human exposure to Site chemicals.
Exposure Assumptions and Pathways
Consistent with recommended Cal/EPA (2005a) default exposure assumptions, we have assumed that future on-site resident populations examined in this HRA are directly exposed to soils on a daily basis, for a continual 30-year exposure period. The assumed exposure duration used in this HRA represents an upper-bound estimate of the total amount of time that an individual may be residing in one location. As the average residential exposure duration in one location is actually less than 30 years, the cumulative exposures and risks presented in this HRA for the future onsite residential scenario likely represent overestimates of the more typical exposures that might be incurred in a residential setting.
Additionally, the estimates of potential health risks for future on-site residents do not account for potential clean soil cover, grass, or other covering that actually would reduce exposure below that assumed in this analysis. Thus, the actual exposures to soils at the Site under possible future residential use would probably be much lower than has been estimated in this assessment.
The selection of complete exposure pathways is another area of uncertainty in all risk assessments. In general, this HRA has quantified all potentially complete exposure pathways through which individuals could become exposed to chemicals present in soils. Accordingly, we believe that the exposure pathways quantified in this HRA capture the
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E-2 IRIS ENVIRONMENTAL
range of even theoretical future exposures, and thus provides a conservative estimate of long-term exposures that could occur at the Site.
Bioavailability of Chemicals in Soil
Another exposure factor that has not been taken into account in this assessment is the bioavialability of chemicals in soil. Studies support that certain organic compounds, particularly highly lipophilic compounds such as carcinogenic polycyclic aromatic hydrocarbons (CPAHs), tend to be tightly bound to soil (Kelsey et al. 1997). This phenomenon can substantially reduce the bioavailability of chemicals to people exposed to chemicals in soils. A reduction in the bioavailability of the chemicals adsorbed to soil would reduce the projected health risk associated with exposure to these soils. Low bioavailability could substantially reduce estimated risks below levels calculated using the default assumption that all chemicals are 100% bioavailable.
Soil Exposure Point Concentrations (EPC)
In accordance with USEPA guidance (USEPA, 2010), 95% UCLs were not calculated for data sets with less than five detections or less than eight samples. Although the USEPA guidance (USEPA, 2010) recommends either the use of the mean or the median in these cases, the maximum detected concentration was conservatively used as the representative EPC. The use of maximum concentrations of chemicals of potential concern (COPCs) detected in soil as the representative EPC will result in an overestimate of the cancer risks and noncancer hazards. For instance, thallium was detected in soils in only 1 out of 243 samples, thus, the maximum detected concentration (i.e. 7.8 mg/kg) was conservatively used as the representative EPC. The EPC is 18-times higher than the mean concentration (i.e. 0.43 mg/kg) for thallium. Therefore, the potential exposure to thallium in soils and associated noncancer HI for thallium (i.e. 1.6) is believed to be overestimated in this HRA and the actual noncancer HI is likely below 1.
Fate and Transport Modeling and Estimated Cancer Risks Associated with Volatile Compounds in Soil Gas Soil Gas to Indoor Air
As recommended by Cal/EPA (2005b), the Johnson and Ettinger SG-SCREEN Model for soil gas was used to estimate potential vapor intrusion risks for the future on-site residential populations in this HRA. The modeling is based on the assumptions that the source of contamination is infinite and fixed in place. Both of these assumptions are conservative for soil sources. First, the actual source of contamination is likely finite and will deplete over time, as volatile chemicals migrate upward through the soil column. This depletion can be further accelerated by biodegradation. Second, as the contamination is depleted, the distance between the source and the building will increase, resulting in decreased transport into the indoor environment. Thus, the actual long-term exposures that may occur at the Site are likely significantly lower than assumed in the calculation of future potential risks, especially if biodegradation is occurring.
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E-3 IRIS ENVIRONMENTAL
The Johnson and Ettinger Model was run using default residential building assumptions under the residential exposure scenario, with an indoor air exchange rate that represents an energy-efficient home. The actual ventilation inside the building may be higher due to open windows and natural ventilation, which will lead to lower indoor air concentrations of chemicals than those predicted by the model. Further, the Johnson and Ettinger model is sensitive to the soil property inputs. Therefore, getting a site conceptual framework that accurately describes site lithology is critical to generating accurate modeling results. No site-specific soil properties were used in the model; instead the conservative model default soil property values were used as model inputs. These conservative source and model assumptions incorporated into the model result in an overestimate of exposure concentrations and actual long-term exposures that may occur at the Site are likely significantly lower than assumed in the calculation of future potential risks.
Soil Gas to Outdoor Air
Many of the uncertainties associated with the fate and transport modeling conducted to estimate the predicted outdoor air concentrations for volatile organic compounds (VOCs) are similar to those associated with modeling of indoor air concentrations. As in the indoor air modeling, the modeling assumes that VOCs in soil are not undergoing biodegradation and the modeling is based on the assumption that there is an infinite source of contamination. Additionally, the modeling of outdoor air concentrations is based on the assumption that only a single chemical is present in the subsurface. When many chemicals are present, these chemicals can interact in ways that reduce the vapor pressure of VOCs available for transport through the vadose zone. These assumptions are all likely conservative.
E.3 Uncertainties in the Toxicity Assessment
Uncertainty in the toxicity assessment arises for those chemicals which rely on animal studies as the basis for determining the appropriate toxicity value. All risk assessments assume that adverse effects observed in animal toxicity experiments would also be observed in humans (animal-to-human extrapolation), and that the toxic effect observed after exposure by one route would occur following exposure by a different route (route-to-route extrapolation).
In order to adjust for uncertainties that arise from the use of animal data, regulatory agencies often base the reference dose for noncarcinogenic effects on the most sensitive animal species (i.e., the species that experiences adverse effects at the lowest dose) and adjust the dose via the use of safety or uncertainty factors. The adjustment compensates for the lack of knowledge regarding interspecies extrapolation and possibility that humans are more sensitive than the most sensitive experimental animal species tested. The use of uncertainty factors is considered to be health protective.
Second, when route-specific toxicity data were unavailable, data were derived by route-to-route extrapolation, and equal absorption rates for both routes were assumed (i.e., oral to inhalation and inhalation to oral). This may or may not reflect the actual differences in
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E-4 IRIS ENVIRONMENTAL
toxicity that can be associated with the route of exposure, but is considered to be a conservative and health-protective assumption. Finally, for dermal exposure to soil, chemical-specific absorption data generally were not available. Instead, dermal absorption rates, which were based on the default assumptions provided by the Cal/EPA (Cal/EPA, 1994), were assumed.
Cal/EPA has published a cancer potency factor for naphthalene. The cancer potency factor was based on inhalation studies with rats, conducted by the National Toxicology Program (NTP). According to Cal/EPA, the results of these inhalation studies show clear evidence of respiratory epithelial adenomas and olfactory epithelial neuroblastomas in male and female rats. As the studies are focused on the inhalation route of exposure, and as the cancers observed in these studies are associated with the respiratory system, it is possible that the observed carcinogenicity is route-specific, and would not be observed if exposures were to occur via the oral route. Nonetheless, as a conservative screening-level approach, the cancer potency factor for naphthalene developed by Cal/EPA has been applied to the oral and dermal routes of exposure in this HRA. Accordingly, the cancer risk for naphthalene estimated in this HRA is based on the assumption that inhalation, oral and dermal exposure to naphthalene present in soils could result in cancer effects. Further note that there are uncertainties associated with the toxicity value used to estimate the hazard associated with exposure to thallium in soils. The reference dose (RfD) used in the HRA to estimate the hazard associated with exposure to thallium in soils has been withdrawn by USEPA from the Integrated Risk Information System (IRIS) database as of September 30, 2009. Previously, the IRIS database contained separate IRIS summaries for each of the five soluble thallium salts (thallium (I) acetate, thallium (I) carbonate, thallium (I) chloride, thallium (I) nitrate, and thallium (I) sulfate) that were posted in 1988. The previous RfD values for these soluble salts, ranging from 8 × 10-5 to 9 × 10-5 mg/kg-day, were based on the same principal study (MRI, 1988). The available toxicity database for thallium contains studies that are generally of poor quality. The Midwest Research Institute study (MRI, 1988) that was selected as a candidate principal study suffers from certain critical limitations (e.g., high background incidence of alopecia, lack of histopathological examination of skin tissue in low- and mid-dose groups, and inadequate examination of objective measures of neurotoxicity), and there are particular difficulties in the selection of appropriate endpoints. Therefore, even though an RfD would generally be derived with a combined uncertainty factor of 3000, an RfD for soluble thallium salts is not derived in this specific case under the current assessment. Nonetheless, the hazards associated with exposure to thallium in soils have been estimated in the HRA using the withdrawn RfD for thallium salts.
E.4 Uncertainties in the Approaches for the Risk Evaluation of Total Petroleum Hydrocarbon as a Mixture
As indicated in the HRA, the toxicity of total petroleum hydrocarbon (TPH) mixtures is evaluated by evaluating the toxicity of individual compounds that are likely to be associated with the TPH (e.g., benzene, toluene, ethylbenzene, and xylenes [BTEX] and
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E-5 IRIS ENVIRONMENTAL
PAHs), as recommended in California Environmental Protection Agency (Cal/EPA) Department of Toxic Substances Control’s (DTSC) 1994 Preliminary Endangerment Assessment (PEA) Guidance Manual. This approach assesses the health risks associated with the more toxic constituents known to be associated with TPH. Uncertainties inherent in the use of this approach is that not all of the mass of TPH is accounted for by these individual compounds and therefore, the health risks associated with the entire TPH mixture may be underestimated.
Cal/EPA DTSC, TPH Criteria Working Group (TPHCWG), and Massachusetts Department of Environmental Protection (MADEP) have put forth guidance for approaches to evaluate health risks associated with TPH mixtures. In general, these approaches examine a mixture as the sum of several smaller subsets, which are defined by specific carbon ranges and are referred to as fractions. Surrogate toxicity values (i.e. toxicity values derived using toxicity data for mixtures or toxicity values for indicator compounds within a certain fractions) are used to evaluate health risks associated with the individual fractions. Further, the fractional composition of a TPH mixture in terms of both carbon range and structural class (i.e., aliphatic or aromatic) is required for these approaches. There is uncertainty associated with the use of these surrogate approaches in estimating the toxicity of TPH mixtures at the Site because the true composition of weathered TPH-gasoline, TPH-diesel, and TPH-motor oil present at the Site is not known. In addition, the recommended surrogate toxicity values for the TPH fractions are often based on animal studies in which the animals are exposed to fresh petroleum product streams and/or mixtures (i.e. DTSC recommended toxicity value for aliphatic carbon chain C9 to C18 based on various petroleum stream studies on rodents); such studies are arguably not appropriate and/or relevant for evaluating the toxicity of weathered releases, which is the type of TPH present at the Site.
Note that the majority of TPH impacts in the top 10 feet of soils at the Site are collocated with CPAHs and/or other COPCs that exceed their respective ambient-based or risk-based screening concentrations and will be concurrently removed along with CPAHs and other COPCs that exceed their respective ambient-based or risk-based screening concentrations during the implementation of the Feasibility Study/Removal Action Plan (FS/RAW).
E.5 References
California Environmental Protection Agency (Cal/EPA), 1994, reprinted in 1999, Preliminary Endangerment Assessment Guidance Manual, Department of Toxic Substances Control (DTSC), dated January.
California Environmental Protection Agency (Cal/EPA). 2005a. DTSC/HERD Human Health Risk Assessment (HHRA) Note Number 1. Department of Toxic Substances Control (DTSC). October 27.
FINAL Human Health Risk Assessment June 2011 Former Lodi Manufactured Gas Plant Site
E-6 IRIS ENVIRONMENTAL
California Environmental Protection Agency (Cal/EPA). 2005b. Interim Final Guidance for the Evaluation and Mitigation of Subsurface Vapor Intrusion to Indoor Air. Department of Toxic Substances Control. February.
Kelsey, J.W., B.D. Kottler, and M. Alexander. 1997. Selective Chemical Extractants to Predict Bioavailability of Soil-Aged Organic Chemicals. Environmental Science & Technology, 31(1): 214-217.
Midwest Research Institute (MRI). 1988. Toxicity of thallium (I) sulfate (CAS No. 7446-18-6) in Sprague-Dawley rats. Vol. 2. Subchronic (90-day) study [revised final report]. Prepared by Dynamac Corporation, Rockville, MD, for the Office of Solid Waste, Washington, DC; Project No. 8702-L(18); Work Assignment No. 111148-008.
U.S. Environmental Protection Agency (USEPA). 2010. ProUCL Version 4.00.05 User Guide. Office of Research and Development. Washington, D.C. EPA/600/R-07/038. May.
FINAL Human Health Risk Assessment June 2011 Former Lodi Manufactured Gas Plant Site
IRIS ENVIRONMENTAL
ATTACHMENT F
SAMPLE RBSC CALCULATION FOR NAPHTHALENE
ATTACHMENT FEXAMPLE RISK-BASED CONCENTRATION
CANCER ENDPOINT CALCULATION FOR NAPHTHALENE UNDER A FUTURE RESIDENTIAL SCENARIO
Former Lodi Manufactured Gas PlantLodi, California
For carcinogens, the following equation is used to derive the soil RBSC:
Parameter Definition
RBSCa,carcinogen
Risk-Based Screening Concentration, chemical a, forcarcinogenic effects, (mg/kg)
Target Risk Level Target Cancer Risk Level (unitless)
Riska,inhv
Calculated Cancer Risk for Chemical a for the vaporinhalation pathway, developed as described above(unitless)
Riska,inhp
Calculated Cancer Risk for Chemical a for the particulateinhalation pathway, developed as described above(unitless)
Riska,ing
Calculated Cancer Risk for Chemical a for the soilingestion pathway, developed as described above(unitless)
Riska,der
Calculated Cancer Risk for Chemical a for the dermalcontact pathway, developed as described above (unitless)
Conca,inhv
Representative Exposure Concentration of Chemical a forthe vapor inhalation pathway; mg/kg
Conca,inhp
Representative Exposure Concentration of Chemical a forthe particulate inhalation pathway; mg/kg
Conca,ing
Representative Exposure Concentration of Chemical a forthe soil ingestion pathway; mg/kg
Conca,der
Representative Exposure Concentration of Chemical a forthe dermal contact pathway; mg/kg
Notes:
608
5.5E-05
608
608
608
2.1=
PAH = Polycyclic aromatic hydrocarbons.a Riska,inhv is calculated using the Cancer Risk equation (i.e., cancer risk = EC x URF) presented in Section 7.2.1, where exposure concentration (EC) is calculated using the equation presented in Table 5 for the vapor inhalation pathway for the cancer endpoint; unit risk factor (URF) for naphthalene is presented in Table 10. The concentration of chemical in air (Ca) in the EC equation is calculated by dividing the concentration in soils (i.e., 608 mg/kg for naphthalene) by the volatilation factor (VF) for the chemical (i.e., 7.0 x 104 m3/kg). VFs for volatile chemicals are presented in Table D-8 of Attachment D.
Parameter Values for PAHNaphthalene
See calculated value above
1.0E-06
1.2E-04
7.1E-09
1.1E-04
a
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⎢⎣⎡
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⎢⎣⎡
=+++
dera
dera
inga
inga
inhpa
inhpa
inhva
inhvaa
ConcRisk
ConcRisk
ConcRisk
ConcRisk
letRiskLeveTcarcinogenRBSC
,
,
,
,
,
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,
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Attachment F Example RBSC Calculation Page 1 of 1 IRIS ENVIRONMENTAL
FINAL HUMAN HEALTH RISK ASSESSMENT / FEASIBILITY STUDY / REMOVAL ACTION WORKPLAN FORMER LODI MANUFACTURED GAS PLANT
APPENDIX E Extent of Soil Chemical Impacts Above Cleanup Goals
Human Health Risk Assessment / Feasibility Study / Removal Action Workplan
Former Lodi Manufactured Gas Plant PN: 185702232
July 11, 2012
599
SS‐1 BaPe Naph Pb
0' 0.43946 <1.65 23.9
SS‐2 BaPe Naph Pb
0' 7.4624 0.540 24,800
SS‐3 BaPe Naph Pb Thal l ium
0' 170.07 5.0 451 7.8
SS‐4 BaPe Naph Pb
0' 23.38 5.1 691
SS‐5 BaPe Naph Pb
0' 1.09904 <1.65 147
SS‐6 BaPe Naph Pb
0' (0.28875) <0.330 3.2
SS‐7 BaPe Naph Pb Antimony
0' 87.11 15 1,400 49.6
SS‐8 BaPe Naph Pb
0' 43.346 3.3 2,320
SS‐9 BaPe Naph Pb
0' 9.7702 0.960 165
SS‐10 Pb
0' 599
SB‐1 BaPe Naph Pb
0' 0.43838 0.041 39.33' 0.02025 <0.015 5.556' 0.00925 <0.015 1.939' (0.00875) <0.015 3.56
SB‐2 BaPe Naph Pb
0' 0.03986 <0.015 2.763' (0.00875) 0.016 2.226' (0.00875) <0.015 1.829' 0.09633 <0.015 1.79
SB‐3 BaPe Naph Pb
0' 0.5109 0.570 1.963' 0.3121 0.230 53.16' 0.5062 0.350 22.19' (0.00875) <0.015 13.4
SB‐4 BaPe Naph Pb
0' 0.9624 0.140 14.93' 0.6333 0.540 64.96' 0.216 <0.150 24.87' 3.818 0.950 783
9' (0.00875) <0.015 1.8
SB‐5 BaPe Naph Pb
0' 29.16 1.40 1,1006' 0.00925 0.020 2.249' (0.00875) 0.042 2.72
SB‐6 BaPe Naph Pb Benzene Ethylbenzene
7.5' 7.217 12.0 12.2 0.140 <0.0059.5 53.8 790 26.6 2,700 5012.5 117.57 1,500 93.2 3,700 40
SB‐7 BaPe Naph Pb
0' 95.72 180 988
3' 0.5872 0.420 31.96' 33.238 27.0 227
9' (0.00875) 0.048 4.14
SB‐8 BaPe Naph Pb
0' (0.04375) <0.075 3.303' (0.00875) <0.015 3.995.5' 53.255 67 97.36' 0.03745 <0.015 2.549' (0.00875) <0.015 5.60
SB‐9 BaPe Naph Pb
0' 4.812 0.52 153
3' 0.13855 0.027 13.16' 1.1576 0.2 6.939' 0.2145 0.21 3.79
SB‐10 BaPe Naph Pb Cobal t
1.5' 3.264 2.7 56.6 1393' 0.53266 0.031 9.40 16.76' 0.4164 0.018 2.79 7.299' (0.00875) 0.22 3.42 8.56
SB‐11 BaPe Naph Pb
0' 1.4728 0.24 1013' 0.02864 0.028 4.706' 0.01212 0.034 3.629' (0.00875) <0.015 2.4215' (0.00875) <0.015 1.47
SB‐12 BaPe Naph Pb
0' 1.3253 0.4 99.21.5' (0.00875) <0.015 2.483' 35.86 6.8 383
6' 8.4462 2.6 549' 0.7633 0.71 7.6712' (0.00875) <0.015 3.5415' 0.01215 <0.015 4.43
SB‐13 BaPe Naph Pb
0' 93.766 19 386
3' 28.406 3.4 1166' (0.00875) <0.015 46.69' (0.00875) <0.015 3.36
SB‐14 BaPe Naph Pb
0' 2.1936 0.68 1452' 84.71 510 1433' 71.06 460 37.96' 19.628 170 10.19' (0.00875) <0.015 2.58
SB‐15 BaPe Naph Pb
0' 14.619 4.1 261
3' 10.078 3 55.36' 2.498 <0.750 27.39' (0.0175) <0.030 1.09
SB‐16 BaPe Naph Pb
1' 16.2166 1.6 371
3' 0.09889 0.15 32.06' 0.21505 <0.30 4.879' (0.0175) <0.015 3.14
SB‐17 BaPe Naph Pb
1' 4.1594 0.79 86318' 0.1762 <0.20 10.120.5' 0.3587 4.8 2.0025.5' (0.0175) 0.020 1.45
SB‐18 BaPe Naph Pb
0' 56.814 11 268
8' 0.2101 <0.10 3.4216' 0.993 0.47 4.2526' (0.0175) <0.020 5.6265' (0.0175) <0.020 3.63
SB‐19 BaPe Naph Pb Ethylbenzene
5' 0.0175 <0.020 1.99 <0.0009215.5' 0.3555 1.8 3.14 0.92021' 0.3547 4.8 2.23 7.528' (0.0175) <0.020 3.79 <0.0011
SB‐20 BaPe Naph Pb
0' 5.2528 0.62 90.614' (0.0175) <0.020 4.1220' 0.0394 0.087 2.2566.5' (0.0175) <0.020 5.23
SB‐21 BaPe Naph Pb
0' 0.4091 0.054 77.85' 1.4182 0.290 1.9310' (0.0175) <0.020 2.86
SB‐22 BaPe Naph Pb
0' 18.79 16 323
5' 2.607 0.46 2.2710' (0.0175) <0.020 4.50
SB‐23 BaPe Naph Pb
0' 25.846 3.4 1,340
10' (0.0175) <0.020 2.5112' 23.88 3.3 1,100
15' (0.0175) <0.020 3.02
SB‐24 BaPe Naph Pb
0' 0.5336 0.10 12.35' 0.6613 <0.10 3.2010' (0.0175) <0.020 3.93
SB‐25 BaPe Naph Pb
0' 62.4 24 180
5' (0.0175) <0.020 2.9010' (0.0175) <0.020 1.64
SB‐26 BaPe Naph Pb
0.5' (0.0175) <0.020 6.035' (0.0175) <0.020 1.8110' (0.0175) <0.020 1.83
SB‐27 BaPe Naph Pb
0.5' 1.8614 <0.020 52.15' (0.0175) <0.020 3.4110' (0.0175) <0.020 1.2515' (0.0175) <0.020 1.83
SB‐28 BaPe Naph Pb
0.5' 0.61776 0.051 52.18' (0.0175) <0.020 3.9715' (0.0175) <0.020 3.28
SB‐29 BaPe Naph Pb
0.5' 0.2243 <0.020 29.55' (0.0175) <0.020 1.9310' (0.0175) <0.020 2.6113' (0.0175) <0.020 3.39
SB‐30 BaPe Naph Pb
0.5' 0.63068 0.086 57.25' 0.0187 <0.020 2.6710' (0.0175) <0.020 3.4813' (0.0175) <0.020 3.84
SB‐31 BaPe Naph Pb
0.5' 0.08693 0.026 7.185' (0.0175) <0.020 1.6810' (0.0175) <0.020 3.7315' (0.0175) <0.020 0.602
SB‐32 BaPe Naph Pb
0.5' 0.3656 <0.020 5.315' 0.0779 <0.020 4.6010' (0.0175) <0.020 5.2715' (0.0175) <0.020 0.889
SB‐33 BaPe Naph Pb
0.5' 153.14 49 80.75' (0.0175) <0.020 2.3910' (0.0175) <0.020 6.7015' (0.0175) <0.020 1.23
SB‐34 BaPe Naph Pb
0' 18.978 3.6 2078' (0.0875) <0.10 2.4112' (0.0175) <0.020 1.42
SB‐35 BaPe Naph Pb
0' 10.487 2.1 1293' 0.09929 <0.020 3.396' (0.0175) <0.020 2.509' (0.0175) <0.020 3.31
SB‐36 BaPe Naph Pb
0' 0.4333 1.3 45.33' 0.7414 0.10 9.316' (0.0175) <0.020 3.249' (0.0175) <0.020 3.46
SB‐37 BaPe Naph Pb
0' (0.175) 5.8 7.663' 3.276 0.66 12.66' 0.0193 0.040 4.049' (0.0175) <0.020 2.77
SB‐38 BaPe Naph Pb
0' 1.83 5.0 53.23' 0.2738 0.16 6.666' (0.0175) <0.020 3.829' (0.0175) <0.020 2.65
SB‐39 BaPe Naph Pb
0' (0.175) 2.2 25.93' (0.0175) 0.36 3.346' (0.0175) <0.020 2.749' (0.0175) <0.020 1.87
SB‐40 BaPe Naph Pb
0' 0.07357 <0.020 70.93' 0.12601 0.039 2506' (0.0175) <0.020 3.449' (0.0175) <0.020 2.16
SB‐41 BaPe Naph Pb
0' 0.1271 1.4 17.73' (0.0175) 0.037 3.726' (0.0175) <0.020 3.629' (0.0175) <0.020 1.91
SB‐42 BaPe Naph Pb
0' 0.10358 0.12 16.33' (0.0175) <0.020 3.436' (0.0175) <0.020 3.949' (0.0175) <0.020 2.42
SB‐43 BaPe Naph Pb
0' 5.348 0.86 99.83' 0.04853 <0.020 3.776' (0.0175) <0.020 2.069' (0.0175) <0.020 2.71
SB‐44 BaPe Naph Pb Nickel
0' 0.04512 1.3 36.0 4,3303' 0.22423 0.078 15.3 1156' (0.0175) <0.020 7.01 14.69' (0.0175) <0.020 1.88 4.17
SB‐45 BaPe Naph Pb
0' 0.11995 6.9 13.83' 0.08986 0.24 5.946' (0.0175) <0.020 1.689' (0.0175) <0.020 2.08
SB‐46 BaPe Naph Pb
0' 0.4257 1.1 52.33' (0.0175) 0.055 3.926' (0.0175) <0.020 3.059' (0.0175) <0.020 1.47
SB‐47 BaPe Naph Pb
0.5' 25.486 1.2 2223' 0.18134 <0.020 5.936' (0.0175) <0.020 2.42
SB‐48 BaPe Naph Pb
1.5' 91.048 9.6 24.63' 7.6314 1.2 7.876' (0.0175) <0.020 3.38
SB‐49 BaPe Naph Pb Benzene Pyrene Fluoranthene
Benzo(g,h,i )Perylene
Acenaph‐thylene
2‐Methyl ‐naphtha lene
3' 17.712 4.9 10.8 0.0010 13 10 22 2.7 <1.04' 4,998 23,000 86.2 0.810 10,000 9,800 3,400 4,100 1,0006' 0.26264 0.17 9.11 <0.00061 0.54 0.49 0.16 0.13 <0.020
SB‐50 BaPe Naph Pb
1.5' 43.67 <4.0 15.33' 0.10026 <0.020 3.126' (0.0175) <0.020 3.41
SB‐51 BaPe Naph Pb Pyrene Fluoranthene Perylene
1.5' 2.3704 0.34 11.4 2.7 2.7 2.63' 0.58588 0.27 6.70 0.82 0.60 0.596.5' 9,824 <1,000 15.1 21,000 20,000 11,0009' (0.0175) <0.020 3.59 <0.020 <0.020 <0.020
SB‐52 BaPe Naph Pb
1' 0.18227 <0.020 6.783' 0.0711 <0.020 4.046' (0.0175) <0.020 2.639' (0.0175) 0.040 4.4115' (0.0175) <0.020 1.9420' 0.3529 <0.40 3.3924.5' (0.0175) 0.062 5.89
SB‐53 BaPe Naph Pb
0.5' 0.10622 <0.040 39.13' (0.0175) <0.020 5.926' 0.3375 <0.040 14.49' (0.0175) <0.020 4.0415' (0.0175) <0.020 2.1120.5' 0.0358 <0.040 2.2725' (0.0175) 0.12 4.35
SB‐54 BaPe Naph Pb
1' 0.0188 <0.020 9.213' 0.07899 <0.020 7.956' (0.0175) <0.020 2.829' (0.0175) <0.020 4.7515' 0.0758 <0.040 6.2620' 0.037 <0.040 4.8922' 0.0845 0.21 3.51
SB‐55 BaPe Naph Pb
1.5' (0.0175) <0.020 3.753' (0.0175) <0.020 4.046' (0.0175) <0.020 3.479' (0.0175) <0.020 2.7515' (0.0175) <0.020 4.0720' 0.0373 <0.040 2.3425' (0.0175) <0.020 6.20
SB‐56 BaPe Naph Pb
0.5' 36.34 <4.0 3463' 0.27258 0.058 6.966' 0.05551 <0.020 4.169' 0.0198 <0.020 3.5015' 0.03653 <0.020 5.3120.5' 0.882 <1.0 3.5825' (0.0175) <0.020 5.17
SB‐57 BaPe Naph Pb
20.5' (0.0175) <0.020 2.32SB‐58 BaPe Naph
0' 0.07252 <0.0205' (0.0175) <0.02010' (0.0175) <0.020
SB‐59 BaPe Naph
3' (0.0175) <0.0205' (0.0175) <0.02010' 0.08259 <0.020
SB‐60 BaPe Naph
0' (0.0175) <0.0205' 0.01772 <0.02010' (0.0175) <0.020
SB‐61 BaPe Naph
0' (0.0175) <0.0205' 0.01762 <0.02010' 0.01765 <0.020
SB‐62 BaPe Naph
0' (0.0175) <0.0205' (0.0175) <0.02010' 0.01881 <0.02015' (0.0175) <0.020
SB‐63 BaPe Naph
1' (0.0175) 0.205' (0.0175) <0.02010' (0.0175) <0.02015' 0.02053 <0.020
SB‐64 BaPe Naph
1' (0.0175) <0.0205' (0.0175) <0.02010' (0.0175) <0.02015' (0.0175) <0.020
SB‐65 BaPe Naph
1' 0.03804 <0.0205' 0.03645 0.06210' 0.22148 <0.02015' (0.0175) <0.020
SB‐66 BaPe Naph
0' (0.0175) 0.195' (0.0175) <0.02010' 0.05114 <0.020
SB‐67 BaPe Naph
0' (0.0175) <0.0205' (0.0175) <0.02010' (0.0175) <0.020
SB‐68 BaPe Naph
0' (0.0175) <0.0205' (0.0175) <0.02010' (0.0175) <0.020
SB‐69 BaPe Naph
0' (0.0175) <0.0205' (0.0175) 0.03910' 0.04913 0.035
TP‐1 BaPe Naph Pb0.5' 0.16558 <0.020 1083' (0.0175) <0.020 9.756' (0.0175) <0.020 4.29
TP‐2 BaPe Naph Pb
0.5' 1.3059 <0.20 2003' 0.16315 <0.020 39.36' 6.777 <1.0 28.19' 0.0194 <0.020 8.11
TP‐3 BaPe Naph Pb0.5' 27.616 <2.0 3473' 0.8562 <0.10 75.16' 0.8916 <0.10 19.9
TP‐4 BaPe Naph Pb0.5' 0.0388 <0.020 8.683' (0.0175) <0.020 4.696' (0.0175) <0.020 2.83
TP‐5 BaPe Naph Pb0.5' 0.05599 0.045 92.73' (0.0175) <0.020 8.926' (0.0175) <0.020 3.10
TP‐6 BaPe Naph Pb0.5' 2.778 <0.40 7013' (0.0175) <0.020 57.66' (0.0175) <0.020 8.05
TP‐7‐25 BaPe Naph Pb1.1' 2.76 <0.40 2592.7' 1.5662 0.28 22.4
TP‐7‐40 BaPe Naph Pb1.1' 0.33902 0.038 11.92.7' 0.0214 <0.020 4.08
TP‐8 BaPe Naph Pb0.5' 45.532 3.8 2503' 0.5217 0.031 7.366' 0.13354 <0.020 4.04
TP‐9 BaPe Naph Pb0.5' 54.226 <2.0 1683' 3.205 <0.40 24.96' 0.6713 <0.10 5.499' 0.79 0.34 2.91
TP‐10 BaPe Naph Pb0.5' 0.2233 0.029 30.73' 1.6857 <0.20 15.96' 0.15649 <0.020 4.92
TP‐11 BaPe Naph Pb0.5' 89.456 5.8 32.03' 31.31 1.2 9.436' 1.9426 <0.20 4.479' 4.8578 1.5 3.20
AK‐1 BaPe Naph Pb2.5' 0.29454 <0.020 39.63.2' 0.10127 <0.020 24.4AK‐2 BaPe Naph Pb
1.7' 0.0385 <0.020 31.72.8' (0.0175) <0.020 6.69
AK‐3 BaPe Naph Pb1.4' (0.0175) <0.020 2.77
FINAL HUMAN HEALTH RISK ASSESSMENT / FEASIBILITY STUDY / REMOVAL ACTION WORKPLAN FORMER LODI MANUFACTURED GAS PLANT
APPENDIX F DTSC Responsiveness Summary and CEQA Notice of
Exemption Human Health Risk Assessment / Feasibility Study / Removal Action
Workplan Former Lodi Manufactured Gas Plant
PN: 185702232 July 11, 2012
Department of Toxic Substances Control
Matthew Rodriguez Secretary for
Environmental Protection
Deborah O. Raphael, Director 1515 Tollhouse Road
Clovis, California 93611
Edmund G. Brown Jr.
Governor
Printed on Recycled Paper
Responsiveness Summary
Draft Final Removal Action Workplan, July 2011 Notice of Exemption – CEQA
Former Lodi Manufactured Gas Plant Site
June 22, 2012
Project Title: Draft Human Health Risk Assessment/Feasibility Study/Removal Action Workplan for Former Lodi Manufactured Gas Plant Site Project Location: 712 South Sacramento Street, Lodi, California Contact Person: Jeff Gymer (559) 297‐3907
I. Introduction From May 20 through June 21, 2012, the California Department of Toxic Substances control (DTSC) held a public comment period on the Draft Final Human Health Risk Assessment/Feasibility Study/Removal Action Workplan (Draft RAW) and CEQA – Notice of Exemption for the former Lodi Manufactured Gas Plant (MGP) site located at 712 South Sacramento Street, San Joaquin County, California. The purpose of the comment period was to provide the public with an opportunity to review information regarding the project and to solicit public comments on the adequacy of the Draft RAW and appropriateness of the Notice of Exemption. DTSC received one written comment on the project during the public comment period. Project records are available for review at:
DTSC – File Room 1515 Tollhouse Road Clovis CA 93611 (559) 297‐3901 Please call for an appointment
The RAW and associated documents are also available for review at: Fresno County Free Library ‐ Reference Desk 2420 Mariposa Street Fresno, CA 93721 (559) 600‐7323 Or electronically at: http://www.envirostor.dtsc.ca.gov/public. II. Comment and Response
Comment: “Considering the economics of the City of Lodi, the State of California, the United States of America, and all European nations, the soonest this ground would be needed for any purpose that would at al disturb it would be a minimum of fifty years. Leave it alone!.” Received May 30, 2012 from Mr. James N. Sayles, 411 S. School Street, Apt. 1, Lodi, CA 95240. DTSC Response: Pacific Gas and Electric Company (PG&E) is voluntarily cleaning up this project and bearing the sole cost of project investigation and cleanup. The remediation of this site is part of a company‐wide program to address soil and groundwater impacts at all manufactured gas plant properties that the company historically owned and/or operated. DTSC’s mission is to provide the highest level of safety and to protect public health and the environment from toxic harm. Cleanup of this site is in keeping with DTSC’s mission.