FINAL REMEDIAL INVESTIGATION REPORT V & M/ALBALADEJO …

EPA CONTRACT NO.: 68-W-98-210WORK ASSIGNMENT NO.: 016-RICO-02DW

DOCUMENT CONTROL NO.: 3220-016-RT-RIRT-01057

FINAL REMEDIAL INVESTIGATION REPORTV & M/ALBALADEJO FARMS SITE

VEGA BAJA, PUERTO RICO

July 14, 2000

Prepared for:

U.S. Environmental Protection Agency290 Broadway

New York, New York 10007-1866

Prepared by:

CDM FEDERAL PROGRAMS CORPORATION125 Maiden Lane, Fifth FloorNew York, New York 10038

300749

A Suosidiary of Camp Dresser & McKee IncFederal Programs Corporation

engineering

July 14, 2000

Ms. Caroline KwanRemedial Project ManagerU.S. Environmental Protection Agency290 Broadway - 20* FloorNew York, NY 10007-1866

PROJECT: RAC H Contract No.: 68-W-98-210Work Assignment No.: 016-RICO-02DW

DOC. CONTROL NO.: 3220-016-RT-RIRT-01057

SUBJECT:

Dear Ms. Kwan:

Final Remedial Investigation ReportV&M/Albaladejo Farms SiteVega Baja, Puerto Rico

COM Federal Programs Corporation (CDM Federal), on behalf of our entire RAC II Team, ispleased to submit 6 bound and 1 unbound copies of the Final Remedial Investigation Report forthe V&M/Albaladejo Farms Site in Vega Baja, Puerto Rico.

If you have any questions regarding this submittal, please contact me at (908)-757-9500 orSusan Schofield at (212) 785-9123.

Very truly yours,

CDM FEDERAL PROGRAMS CORPORATION

Jeanne Litwin, REMRAC n Technical Operations Manager

cc: F. Rosado, EPA Region n (letter only)D. Butler, EPA Region n (letter only)J. Bass, CDM Federal

S. Schofield, CDM FederalR. Goltz, CDM Federal (letter only)RAC n Document Control

C:\V&m\TRANSLT.WPD

300750

V&M/Albaladejo Farms SiteVega Baja, Puerto Rico

Table of Contents

Section Page

EXECUTIVE SUMMARY

1.0 INTRODUCTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-11.1 Purpose of Report . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-11.2 Site Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-11.3 Report Organization . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-4

2.0 STUDY AREA INVESTIGATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-12.1 Surface Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-12.2 Contaminant Source Investigations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-12.3 Meteorological Investigation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-12.4 Geological Investigations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-2

2.4.1 Monitoring Well Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-22.4.1.1 Soil Boring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-22.4.1.2 Bedrock Coring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-22.4.1.3 Geophysical Borehole Logging . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-2

2.5 Vadose Zone Modeling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-32.6 On-Site Surface Runoff Sampling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-42.7 On-Site Sediment Sampling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-42.8 Groundwater Investigation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-4

2.8.1 On-Site Monitoring Well Installation and Sampling . . . . . . . . . . . . . . . . . 2-42.8.1.1 Monitoring Well Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-42.8.1.2 Monitoring Well Sampling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-5

2.8.2 Off-site Groundwater Sampling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-72.8.3 Synoptic Water Level Measurements . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-82.8.3 Continuous Water Level Measurements . . . . . . . . . . . . . . . . . . . . . . . . . . 2-8

2.7 Spring/Seep Survey and Sampling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-92.8 Man-Made Features Survey . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-102.9 Demography and Land . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-102.10 Ecological A s s e s s m e n t . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-10

3.0 PHYSICAL CHARACTERISTICS OF STUDY AREA . . . . . . . . . . . . . . . . . . . . . . . . . . 3-13.1 Surface Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-13.2 Meteorology . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-13.3 Surface Water Hydrology . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-23.4 Geology . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-2

3.4.1 Regional Geology . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-23.4.2 Local Geology . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-3

3.4.2.1 Rock Outcrop-Blanket Deposits . . . . . . . . . . . . . . . . . . . . . . . . . . 3-33.4.2.2 Aymamon Formation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-4

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V&M/AIbaladejo Farms SiteVega Baja, Puerto Rico

Table of Contents (Continued)

3.4.2.3 Aguada Formation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-43.5 Hydrogeology . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-5

3.5.1 Regional Hydrogeology . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-53.5.2 Local Hydrogeology . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-6

3.5.2.1 Synoptic Water Level Measurements . . . . . . . . . . . . . . . . . . . . . . 3-73.5.2.2 Groundwater Potentiometric Surface . . . . . . . . . . . . . . . . . . . . . . . 3-73.5.2.3 Continuous Water Level Measurements . . . . . . . . . . . . . . . . . . . . 3-73.5.2.4 Hydraulic Gradients . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-83.5.2.5 Groundwater Flow Velocity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-93.5.2.6 Spring/Seep Survey . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-9

3.6 Vadose Zone Modeling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-103.7 Demography and Land Use . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-103.8 Biota and Environmental Resources . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-11

4.0 NATURE AND EXTENT OF CONTAMINATION ............................ 4-1

4.1 "Selection of Screening Criteria (ARARS) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-14.2 Nature And Extent of On-Site Groundwater Contamination . . . . . . . . . . . . . . . . . 4-2

4.2.1 Round 1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-34.2.2 Round 2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-34.2.3 Round 3 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-44.2.4 Round 4 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-54.2.5 Summary of On-Site Contamination . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-5

4.3 Nature And Extent of Off-Site Contamination of Groundwater in Privateand Municipal Supply Wells . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-64.3.1 Summary of Supply Well Contamination . . . . . . . . . . . . . . . . . . . . . . . . . 4-7

4.4 Nature And Extent of Off-Site Contamination in Spring/Seeps . . . . . . . . . . . . . . 4-8

5.0 CONTAMINANT FATE AND TRANSPORT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-15.1 Contaminants of Potential Concern . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-15.2 Contaminant Transport Pathways . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-1

5.2.1 Properties of Site Media Influencing Contaminant Transport . . . . . . . . . . 5-15.2.1.1 Topography . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-15.2.1.2 Surficial Geology . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-25.2.1.3 Groundwater Flow . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-25.2.1.4 Soil Chemistry . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-2

5.2.2 Potential Contaminant Transport Pathways . . . . . . . . . . . . . . . . . . . . . . . . 5-35.3 Chemical and Physical Properties of Contaminants . . . . . . . . . . . . . . . . . . . . . . . 5-3

5.3.1 Contaminant Persistence (Fate) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-35.3.1.1 Processes that Affect Persistence . . . . . . . . . . . . . . . . . . . . . . . . 5-45.3.1.2 Persistence of Inorganic Compounds . . . . . . . . . . . . . . . . . . . . . . 5-4

ii 300752



5.3.2 Contaminant Mobility (Transport) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-45.3.2.1 Mobility of Metals . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-55.3.2.2 Mobility of Site Contaminants in Groundwater . . . . . . . . . . . . . . . 5-6

5.4 Summary of Contaminant Fate and Transport . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-7

6.0 SUMMARY AND RECOMMENDATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-16.1 Sources of Contamination . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-16.2 Nature and Extent of Contamination . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-1

6.2.1 On-Site Sampling Rounds . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-26.2.2 Off-Site Well Sampling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-26.2.3 Off-Site Spring/Seep Sampling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-36.2.4 Relationship Between Soil and Groundwater Contamination . . . . . . . . . . 6-3

6.3 Summary of Contaminant Fate and Transport . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-36.4 Conclusions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-46.5 Recommendations for Future Work . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-5

7.0 REFERENCES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-1

APPENDICES

APPENDIX AAPPENDIX B

APPENDIX CAPPENDIX DAPPENDIX EAPPENDIX FAPPENDIX G

APPENDIX H

Deviations To The Final Work PlanField XRF Sampling Results from Time-Critical Soil Removal ActionFebruary 2000 Surface Soil ResultsMay 2000 Surface Soil ResultsSoil Boring LogsMonitoring Well DiagramsField Sampling Water Quality ParametersQA/QC Measures and Data QualityCalculations Deriving Sample-Specific Surface Water Screening Values ForSpring/Seep SamplesComplete On-site Groundwater Inorganic Analytical Results

111 300753



LIST OF TABLES

TABLE

2-1 Construction Specifications for Monitoring Wells2-2 On-site Groundwater Sampling Summary2-3 Fractions Analyzed and Data Validation Results for each Sampling Round2-4 Off-site Groundwater Sampling Summary2-5 Spring/Seep Sampling Summary3-1 Synoptic Monitoring Well Water Level Summary and Screen Intervals3-2 Bird Species Identified at the V&M Site4-1 Groundwater Screening Criteria4-2 Surface Freshwater Quality Criteria4-3 Results of Round 1 Groundwater Monitoring Well Sampling4-4 Results of Round 2 Groundwater Monitoring Well Sampling4-5 Results of Round 3 Groundwater Monitoring Well Sampling4-6 Results of Round 4 Groundwater Monitoring Well Sampling4-7 Sampling Results from Off-Site Private and Municipal Supply Wells4-8 Sampling Results from Off-Site Spring/Seeps5-1 Fate and Transport Properties for Site Contaminants5-2 Relative Mobilities of Site Inorganic Contaminants

IV 300754



LIST OF FIGURES

FIGURE

1-1 Location of V&M/Albaladejo Farms Site1-2 Site Map - V&M/Albaladejo Farms Site1-3 Schematic Site Map Showing Burn Area Nomenclature Used for the Removal Action

Reports2-1 Well Location Map2-2 Monitoring Well Locations and Burn Area/Soil Removal Action Zones2-3 Schematic Diagram for Bedrock Monitoring Wells2-4 Location of Private and Municipal Wells Within a 1.5-Mile Radius of the Site2-5 Location of Spring/Seeps Sampled along the Rio Indio3-1 Regional Topographic Map Showing Site3-2 Average Monthly Temperatures and Precipitation3-3 Generalized Surficial Geology of the Vega-Baja Region, Puerto Rico3-4 Stratigraphic Column of Middle Tertiary Age North Coast Limestones3-5 Generalized Geologic Cross Section Through North Coast Limestones in Area Near the

V&M Site3-6 Geological Cross Section A-A' Across the V&M Site3-7 Geological Cross Section B-B' Across the V&M Site3-8 Regional Groundwater Flow Direction in Vicinity of Site3-9 On-site Water Table Elevation Change Between Dry and Wet Season Synoptic Water Level

Measurement Events3-10 Site Potentiometric Surface Contour Map3-11 On-site Continuous Water Level Measurement Hydrographs5-1 Conceptual Model of Potential Contaminant Migration Pathways from the V&M Site

300755

ACRONYMS

AlARCSAsAWWABa°CCaCdCDM FederalCERCLA

CLPCoCOPCCrCRDLCuDODQOEhEPAEQBFeFITFOCFSftft/dHgHSArowin/yrLCSLCSDmaslMCLMDLMgMnMSMSDNaNiNLP

aluminumAlternative Remedial Contracting StrategyarsenicAmerican Water Works AssociationbariumDegrees CentigradecalciumcadmiumCDM Federal Programs CorporationComprehensive Environmental Response, Compensation and Liability Act of1980Contract Laboratory ProgramcobaltChemical of Potential ConcernchromiumContract Required Detection LimitcopperDissolved OxygenData Quality ObjectiveOxidation reduction potentialU.S. Environmental Protection AgencyEnvironmental Quality BoardironField Investigation TeamFraction of Organic CarbonFeasibility StudyFeetFeet per DaymercuryHollow Stem AugerInvestigation-Derived WasteInches per yearLaboratory Control SampleLaboratory Control Sample DuplicateMeters above mean sea levelMaximum Contaminant LimitMethod Detection LimitmagnesiummanganeseMatrix SpikeMatrix Spike DuplicatesodiumnickelNorth Coast Limestone Province

VI 300756

ACRONYMS

NPLNTUOVAPARCCPbPCEpesticides/PCBsproPOPppbppmPQLPRASAPROQAQCRARACRASRCRARIRPDRPMSDGSDWASMCLSOPSOWSTARTSVOCTALTCLTDSTOCTSSUSDAUSGSVVOCXRFZn%R

National Priorities ListNephelometric turbidity unitsOrganic Vapor AnalyzerPrecision, Accuracy, Representativeness, Completeness, and ComparabilityLeadTetrachloroethenepesticides/polychlorinatedbiphenylsPhotoionizer DetectorProject Operations PlanParts per billionParts per millionPractical Quantification LimitPuerto Rico Aqueduct and Sewer AuthorityPreliminary Remediation GoalQuality AssuranceQuality ControlRisk AssessmentRemedial Action ContractRoutine Analytical ServicesResource Conservation and Recovery ActRemedial InvestigationRelative Percent DifferenceRemedial Project ManagerSample Delivery GroupSafe Drinking Water ActSecondary Maximum Contaminant LevelStandard Operating ProceduresStatement of WorkSuperfund Technical Assistance and Removal TeamSemi-Volatile Organic CompoundTarget Analyte ListTarget Compound ListTotal Dissolved SolidTotal Organic CarbonTotal Suspended SolidsUnited States Department of AgricultureUnited States Geological SurveyvanadiumVolatile Organic CompoundX-Ray fluorescencezincPercent recoverymicrograms per litermicrograms per kilogram

vn 300757

V&M/ALBALADEJO FARMS REMEDIAL INVESTIGATION

EXECUTIVE SUMMARY

SITE DESCRIPTION

The V&M site is located off State Road No. 160, Kilometer 4.2 in the Almirante Norte Ward of themunicipality of Vega Baja, Puerto Rico. It is reached via a dirt road extending about one mile westfrom Rt. 160. The site acreage is unknown and consists of two farms. The area is rural andcharacterized by rugged, heavily-vegetated hilly terrain with small farms located in the valleys. Theregion is sparsely populated within a one-mile radius of the site. Fewer than one hundred residents areestimated to live within one-quarter mile of the site.

The site is located in the limestone uplands of north-central Puerto Rico. This area is characterized bythe distinctive landforms typical of karst terrain, which commonly forms in limestone. Classic karstfeatures on-site include steep hills surrounded by small valleys, sinkholes, subsurface channels andcaves. Groundwater flow in karst terrains can be very complex because of the extensive developmentof sinkholes, subsurface channels, caves and springs.

The Aymamon Limestone outcrops at the site, forming karst hills, or "mogotes". The AymamonLimestone contains an extensive network of subterranean channels (locally, as much as eight inches indiameter). Underlying the Aymamon Formation are the Aguada Limestone and the Cibao Formation.These two formations, although reported not to have as extensive channeling, exhibit highpermeabilities due to karst development. Surficial alluvium and sand deposits, along with the limestonebedrock formations, form an unconfined aquifer which supplies most of the water in this region. Waterin the limestone occurs in fractures and solution channels. The sinkholes may provide a directconnection from the surface to the ground water.

Site History

The V&M site was used for dumping plastic-coated electric cables, electrical equipment, and carbatteries. The wastes were burned to recover the copper, aluminum and lead. No containment (e.g.,berm, liner) system is known to have been used nor has any been observed. It is not known when theburning activity began on either the V&M and the Albaladejo farm properties. Since 1985, one of thefarm owners has reported that trucks entered the site carrying wastes which he believes were generatedby the Puerto Rico Telephone Company and the Puerto Rico Electric and Power Authority. Burningreportedly ceased in 1986 when the V&M farm was purchased by its current owner, but continued into1988 on the Albaladejo farm. The total quantity of waste disposed and burned at the site is unknown.In early 1998, contaminated soils were removed from the former burn areas by an EPA contractor.Clearance testing of burn area soils after the removal action indicated concentrations of lead, one of theprimary site contaminants, had been reduced to below 500 ppm, the site-specific screening level. EPAreturned to the site in February and May 2000 to collect surface soil samples in native soil around theburn areas to confirm that contaminated soil was removed adequately. The sample results were utilizedin the screening level ecological risk assessment.

ES-1 300758

Monitoring Well Installation and Coring

CDM Federal installed six monitoring wells at the V&M Site. The wells were installed at locations to:1) determine the groundwater flow direction away from the site; 2) determine the bedrock geology andstratigraphy beneath the site; 3) collect groundwater samples to determine if soil contamination hasimpacted groundwater beneath the site; and 4) serve as long-term monitoring wells for the site duringthe remedial action period, if found to be necessary. The wells were drilled, continuously core logged(MW-3 and MW-5, only), caliper and gamma logged, installed and completed.

Well Survey

A well survey was conducted to provide accurate water level elevation data for the hydrogeologicalassessment. A topographic site basemap was created from the USGS digital topographic data for thearea. A survey of the locations and elevations of all wells installed during the RI was conducted byCaribbean Aerial Surveys, Inc, a licensed Puerto Rico surveyor.

Geophysical Borehole Logging

To determine subsurface characteristic at the site, CDM Federal logged each RI monitoring well usinga 3-arm caliper and natural gamma tool. The caliper tool was used to identify potentially fractured orvuggy zones which would require additional completion material. The natural gamma tool was usedto correlate between the stratigraphy described in cored intervals with uncored wells and to help developgeological profiles of the subsurface conditions across the site. The natural gamma survey wasconducted after the well was installed and completed.

On-site Groundwater Sampling

Groundwater samples were collected from the six RI wells to determine the nature and extent ofcontamination, and to provide data to support human health and ecological risk assessments, if required.Four rounds of groundwater samples were collected for data comparison and confirmation. The first on-site sampling event occurred during the week of March 29,1998 (Round 1), the second occurred duringthe week of May 18, 1998 (Round 2), the third during the week of September 7, 1998 (Round 3), andthe fourth during the week of November 9, 1998 (Round 4).

Due to data rejection and data invalidation (resulting from laboratory problems) associated with Rounds1 and 2, respectively, and with approval from EPA, samples for Rounds 3 and 4 were collected withdedicated Teflon bailers.

Groundwater samples for Round 1 were analyzed for full target compound/target analyte list(TCL/TAL) parameters including low-concentration volatile organic compounds (VOCs) and TCLpesticides/PCBs. Analytical fractions were eliminated from subsequent rounds of sampling when nocompounds were detected. For example, no pesticides/PCBs were detected in Round 1 results. Thisfraction was not analyzed in Round 2. No SVOCs were detected in Round 2, so this fraction waseliminated in Round 3. No VOCs were detected in Round 3, so only metals were analyzed in Round4.

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Synoptic Water Level Measurements

Three rounds of synoptic water levels were collected during the RI to determine groundwater flowdirection. The first measurement round was completed on March 29, 1998 and was performed duringthe annual dry season. The second round of water levels were measured on May 18, 1998, prior to thesecond round of groundwater sampling, and the third round of measurements occurred on November9, 1998, prior to the fourth round of sampling. The first water level measuring event occurred duringthe dry season (January to April) and the third event occurred during wet season (September toDecember).

Off-site Groundwater Sampling

Off-site groundwater well sampling was conducted to provide ambient water quality data for the RI andto verify that no nearby residents are consuming contaminated water. Water quality in major public andprivate supply wells within a 1.5-mile radius of the site was assessed. Five off-site supply andagricultural/industrial wells that are side gradient of the site were sampled. In addition, one residentialwell located upgradient of the site was sampled to characterize background water quality conditions.

Spring/Seep Survey and Sampling

Aerial photographs of the V&M Site and surrounding area were reviewed to identify springs/seepsalong the Rio Indio that could be connected via conduit flow to the site' s sinkholes and other dissol utionstructures. Following identification of potential springs/seep locations, CDM Federal conducted a fieldreconnaissance along the Rio Indio from the intersection of the river and State Rt. 646 to AlmiranteNorte during the wet season (September to December). The spring/seep survey was performed toprecisely locate groundwater discharge points for sampling. The rationale of the survey was to assesswhether a hydraulic connection between the V&M Site and the springs/seeps could be inferred fromwater quality data collected from the spring/seep water samples.

During the spring/seep survey, only two flowing springs/seeps were identified and sampled. Watersamples were analyzed for full TCL/TAL parameters, including low-concentration VOCs. Sedimentsamples were not collected because the springs issue directly from limestone rock, with noaccumulation of sediment. In addition, the immediate stretch of river downgradient of the springdischarge area is fast-flowing and sediment does not accumulate.

Ecological Assessment

On November 6 and 7,1996, the V&M Site was visited by the CDM Federal Risk Assessor documentedsite habitat conditions and potential wildlife usage to determine possible ecological receptors.Commonwealth agencies also were consulted and a literature search was conducted to identify potentialrare, threatened or endangered species in the vicinity of the site. A qualitative ecological riskassessment was conducted in 1998 after the EPA soil removal action had been completed.

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ENVIRONMENTAL SETTING

The topography of the site is characterized by large-scale karst weathering and dissolution features,including closed drainage depressions, sinkholes (dolines) and rugged limestone hills (mogotes). Thepredominant site feature is a large elongated, approximately north-south trending, depression whichcontains at least two sinkholes. This depression receives drainage from the majority of the site. Severalsmaller, circular sinkholes are present in the north and western parts of the site. Individually, thesinkholes may be up to 20 meters (±60 ft.) below the general base elevation of the site.

Geology

The bedrock formations relevant to the RI are a series of late-middle Tertiary-age (early Miocene)limestones consisting of the Aymamon Limestone, which forms the rugged doline hills at the site; theAguada Limestone, which is encountered in the subsurface below the Aymamon Limestone and insinkholes; and the underlying Cibao Formation, the upper member of which likely acts as a lowerconfining unit (but was not encountered during RI drilling, coring, or logging). The site is located nearthe east-west trending outcrop of the conformable contact between the lower portion of the AymamonFormation and upper part of the Aguada Formation The limestone sequence has a general east-to-weststrike and dips gently to the north at 1 to 6 degrees.

Overlying the limestones in some areas of the NLP are Quaternary clastic deposits consisting of reddishclays or sandy clays and sands. This unit, commonly termed "blanket deposits", ranges in thicknessfrom 0 to 100 feet. Recent alluvial deposits are also found along major river valleys, including the RioIndio. Three lithologic units have been identified at the Site and include: 1) the Rock Outcrop-BlanketDeposits (Overburden), 2) the Aymamon Formation, and 3) the Aguada Formation.

Overburden. The unconsolidated overburden deposits rest upon limestone bedrock and are composedof unconsolidated soils and clayey sand deposits. Soil borings into the overburden sediments identifiedcommonly-occurring breccia horizons containing angular limestone clasts within a sand or clay-richmatrix. Depth to the overburden/bedrock interface varies greatly across the V&M Site. The well dataindicate that soils within the central sinkhole depression are at least 50 feet thick (as in MW-3 andMW-5); well data from locations outside the depression show the overburden to be less than 20 feet,averaging about 16 feet deep. Generally, the bedrock contact is rubbly, overlain by a limestone regolithseveral feet thick. In cored wells, the effects of chemical weathering are observed in the bedrock up to30 feet below the weathered regolith, indicating the infiltration of meteoric waters into the bedrockvadose zone is considerable.

Aymamon Formation. The uppermost bedrock unit in all wells except MW-3 comprises massivelimestones of the Aymamon Formation; it is up to 650 feet thick. The mogotes which surround the siteare outcrops of the Aymamon Formation. The degree of weathering decreases gradually with depth.Typically, the limestones are massive, pink, brown or white, fossiliferous, occasional sandy, and maycontain vugs or fractures. Caliper logs through the lower Aymamon Formation are ragged, possiblyindicating vugs and other sizeable solution cavities. Equally, the gamma ray responses through this unitare locally ragged which could indicate the occurrence of clay-rich beds or clay-filled solution cavities.

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Aguada Formation. The Aguada Limestone is characterized by massive white or pink fossiliferouslimestone and sandy limestone with extensive moldic secondary porosity and common clay interbeds.The Aguada Formation, which is up to 350 feet thick, is distinct from the Aymamon Formation by itsgreater lithologic heterogeneity and overall finer-grained texture. Approximately 100 feet below theinferred contact between the two limestone formations, there is an approximately 30 feet thick sandylimestone member which can be traced across the Site between logged and cored wells, and dips gentlytowards the north, parallel to bedding. In cored sections, the sandy limestone may contain up to 50%sand. This unit also is relatively more clay-rich than the rest of the formation and exhibits a relativelyhigher gamma log response reflecting the greater proportion of clays and other detrital minerals.

Hydrogeology

The Aymamon and Aguada formations form one the primary sources of potable water within the NLP.The two formations are in direct hydraulic contact with each other and constitute the upper unconfinedaquifer system of the NLP. The thickness of the upper aquifer in the regional vicinity of the site is upto about 1,000 feet thick. The base of the upper aquifer is defined by the upper members of theunderlying Cibao Formation which acts as a confining unit to the deeper Cibao aquifer. Confininglayers are not known to exist within the upper aquifer in the immediate vicinity of the study area.

Core and geophysical logging of the wells did not identify potential shallow confining layers within thevadose zone which could create perched water table conditions. However, the lower portion of theAguada Limestone unit consists of a more sand-rich limestone which may act as an aquitard, limitingthe vertical movement of groundwater. In addition, the surficial Blanket Deposits likely retard theinfiltration of surface water runoff into the aquifer, especially in the central sinkhole where theoverburden blanket deposits are over 50 feet thick.

Recharge to the water table aquifer likely occurs by direct infiltration of precipitation on limestoneoutcrop areas and by surface runoff into sinkholes. However, the path that stormwater takes from thesurface to the water table is most likely complex. Since the overburden thickness and elevation of thesoil/bedrock interface are highly irregular, the rate of infiltration across the site is probably variable andnot easily quantifiable.

Secondary porosity (i.e., solution channels and vugs) in limestone bedrock significantly affectsgroundwater flow patterns. The presence of sinkholes in the Aymamon Limestone at the site indicatesthat conduit flow through solution channels may be an important groundwater flow mechanism.Solution channels beneath the sinkholes would facilitate rapid infiltration of surface runoff through thevadose zone to the water table. Since on-site sinkholes are at elevations below the former burn areas,storm water runoff would have drained quickly to these topographic lows.

Biota and Environmental Resources

Ecological conditions at the V&M site were observed during a site visit in May, 1998. The site andsurrounding area consist of karst topography which supports three types of vegetative communities,including moist and humid valleys and sinkholes, humid and moist areas along the gentle to extremeslopes, and xeric conditions along the peaks and ridges. Each vegetative community within the siteboundary contained slight variations in species concentration and composition. The concentration and

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composition of the plant species was also influenced by the proximity to the previously disturbed areas.Additional flora and fauna information was ascertained from communications with representatives fromvarious local agencies.

The site is comprised of five areas where wastes have been burned and are surrounded by heavilyvegetated areas, sinkholes, and xeric peaks and ridges. At the time of the site visit, a soil removal actionhad recently been completed at each of the five burn areas at the site. Each of these disturbed areas wasrelatively void of vegetation, but pioneering vegetation was encroaching into the void areas from theadjacent subtropical moist forest. The vegetation within the disturbed areas where the soil removalaction occurred consisted of a variety of grasses, shrubs and vines, and saplings from the surroundingforest.

During the site visit, numerous birds, anoles, and amphibians were observed to be utilizing the site andadjacent areas. Due to the limited amount of time available to collect the flora and fauna information,it is unknown if the birds are residents of the area or were migrants. Other wildlife species observedat the site includes various scorpions, insects, and spiders.

Inquiries were made to the U.S. Fish and Wildlife Service and the Puerto Rico's Department of Naturaland Environmental Resources regarding the presence of threatened and endangered species andecologically sensitive environments that may exist on and in the vicinity of the site. Puerto Rico'sDepartment of Natural and Environmental Resources Natural Heritage Division BiologicalConservation Data Bank reported three animal and four plant species of concern located nearby the site.The Data Bank did not contain records of any of these species located on the site.

Correspondence with the U.S. Fish and Wildlife Service (USFWS) reported that the limestone hillsregion harbors a number of Federally-listed endangered plants and the Federally-listed endangeredPuerto Rican Boa. CDM Federal personnel did not identify any of the plants or animals listed asCritical Elements for the Natural Heritage Division or any threatened or endangered species within thesoil removal areas.

GROUND WATER INVESTIGATION RESULTS

The analytical results of the V&M Site investigation are discussed below.

Groundwater Flow

Groundwater elevation measurements from the six monitoring wells at the V&M Site were used to plotthe potentiometric surface contours for the water table aquifer. A flow direction to the north-northwestis indicated, which is slightly divergent from the region's general groundwater flow direction towardsthe north.

On-site Groundwater Contamination

Based on the review of the four rounds of groundwater analytical results, the frequency of contaminantMCL exceedance at the V&M Site is sporadic. There were no sampling locations which exhibitedconsistently elevated detections of any organic compound or inorganic analyte.

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Organic compounds were sporadically detected; the only exceedance of screening criteria occurredduring Round 1 with the detection of tetrachloroethene (PCE) in MW-6, an upgradient background well.PCE was not detected in MW-6 in Round 2 or Round 3. No other organic compounds exceeded theirscreening criteria in Rounds 1, 2, or 3 (organic compounds were not analyzed in Round 4).

Inorganic analytes also were detected sporadically; however, exceedances of inorganic primary drinkingwater standards were noted for antimony, cadmium, chromium, lead, and nickel during the RI. InRound 1, elevated lead concentrations were detected in downgradient wells MW-1, MW-3, and MW-4;the highest exceedance found in MW-1. An elevated nickel concentration was found in MW-3. InRound 2, a single exceedance of cadmium was detected in MW-3. In Round 3, the only detection andexceedance of antimony was found in MW-6, an exceedance of chromium was detected again in MW-3,and an exceedance of lead occurred in MW-4. There were no exceedances of inorganic analytes inRound 4 sampling.

Inorganic sampling data suggest that site-related rnetals contamination, of lead in particular, hasdecreased in magnitude since the initial on-site well sampling round. The elevated levels of lead andnickel observed in Round 1 sampling were not observed in later sampling rounds (Rounds 3 or 4).

It is possible that the elevated metals concentrations observed in Round 1 have either migrated furtherdowngradient and off site or have attenuated naturally in situ. For each sampling round, the on-sitebackground well results (MW-5 and MW-6) did not exhibit significantly lower analyte detectionscompared with..those of the remaining on-site wells. This could suggest that the analytes detected onsite are derived from an off-site upgradient source, or that they occur naturally. The single exceedanceof antinomy in Round 3 was associated with MW-6, and, therefore, was unlikely to have beenattributable to any former on-site soil contamination.

Off-site Well Sampling

Water quality in major private and municipal supply wells within a 1.5-mile radius of the site wasassessed. One upgradient background residential supply well and five side gradientagricultural/municipal supply wells were sampled during the week of December 1, 1997. The resultsof the well sampling event do not identify exceedances of inorganic MCLs for any sample. Alaboratory detection limit of 10 u,g/l was used for analyses of VOCs; this detection limit is above theMCL for some compounds. Nonetheless, levels of VOCs were not detected above 10 jig/1 and are notknown historically to be a concern at the V&M site. The sidegradient well samples did not containnoticeably greater concentrations of analyzed compounds compared with the upgradient backgroundwell. Low concentrations of a S VOC commonly associated with laboratory sample preparation anddetections of three pesticides were noted in four of the wells. Several inorganic analytes were detectedat concentrations well below their respective MCLs. Of note, the analyte concentrations from theupgradient off-site background well are higher than the sidegradient off-site wells (with the exceptionof zinc). This suggests that groundwater quality in sidegradient wells has not been affected by surfacecontaminant releases from the V&M Site.

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Off-Site Spring/Seep Sampling

Two spring/seeps were identified along the Rio Indio valley, at potential discharge points forgroundwater derived from the site. Spring/Seep sampling results were compared with the relevantSurface Water Quality Criteria. None of the spring/seep sampling results detected organic compounds.Although aluminum was detected above the Surface Water Quality Criteria: Continuous Concentrationin both samples collected from Spring-1; neither sample exceeded the Surface Water Quality Criteria:Maximum Concentration. Other detected analytes were below their respective screening criteria.

SUMMARY OF CONTAMINANT FATE AND TRANSPORT

The inorganic chemicals of potential concern detected in the groundwater of the site possess varyingchemical properties which affect their speciation and transport through soil. Each metal therefore willbehave differently. The metal COPCs are generally low to moderately mobile in the site's clay-richsoils and show high absorption to soils depending on the soil conditions (e.g., pH and the presence ofanions). The risks to groundwater appear to be minimal if soil leaching is the predominant migrationmechanism at the site. Past disposal of car batteries and battery acid likely would have mobilizedmetals in the soil, accelerating their downwards migration towards the water table. However, theflushing action of rainwater infiltration likely would dilute the acidic solutes and immobilize the metalsalts.

Metals-contaminated runoff may have impacted groundwater through conduit flow, via sinkholes andfractures, prior to the soil removal action. Elevated levels of lead and nickel in Round 1 groundwatersampling could be attributable to this migration pathway. Of note, Round 1 sampling was conductedduring the soil removal activities, such that a surface soil contamination source may still have beenavailable and mobilized during surface runoff "flushing" events. The results of Rounds 2 and 3 showCOPCs were detected less frequently and at lower exceedances of screening criteria. There were noinorganic exceedances for Round 4 sampling.

The EPA soil removal action was completed in March 1998, effectively removing the source ofgroundwater contamination. Consequently, it is assumed that no further contaminants were releasedto the aquifer after March 1998. Also, it is assumed that Round 1 sampling results indicate levels ofcontamination in the tail end of a slug of contaminated groundwater.

The most conservative estimation for the fate and transport of site-derived contaminants is to calculatethe approximate downgradient distance contaminants may have traveled in the aquifer from the sitesource. The groundwater velocity beneath the site was not measured during the RI; however, theslowest, most conservative groundwater velocity that has been published in the site's vicinity was used.Assuming that the site contaminant source was removed by the end of March, 1998, we calculate thatthe tail end of the groundwater contaminant slug would have traveled more than one mile north-northwest at a velocity of 0.005cm/s. The Rio Indio is approximately 0.4 mile to the northwest of thesite and has been identified as a gaining river which is recharged from groundwater. Therefore, it islikely that the Rio Indio was a discharge point for site contamination. The Rio Indio flows north anddischarges into the Atlantic Ocean.

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Subsequent sampling rounds (Rounds 2, 3, and 4) were conducted after the completion of the soilremoval action and did not detect consistently elevated concentrations of heavy metals. Analytes weredetected less frequently and at lower exceedances of screening criteria. Round 4 sampling detected noanalytes above screening criteria. These results suggest that there has been no lasting impact to on-siteor off-site groundwater by the release of the site-specific contaminants. Residual concentrations ofmetals in the remaining soils and those sporadically-detected in groundwater are expected to decreaseby adsorption and dilution, respectively. Any remaining metal contaminants reaching the groundwaterare likely to be preferentially precipitated as insoluble salts under the slightly elevated pH conditionsof the karst aquifer.

CONCLUSIONS

The significant findings of the RI are as follows:

• Analytical data collected during this RI, combined with historical data, suggest that the primarysource of contamination was derived from metals-contaminated soils located within fourdiscrete burn areas across the site, most of which are within or around a large central karstdepression containing sinkholes. Burn areas formed where electrical equipment and cables wereillegally burned to recover metals. In early 1998, contaminated soils were removed from theformer burn areas by an EPA contractor. Clearance testing of burn area soils after the removalaction and in February and May 2000 indicated concentrations of lead, one of the primaryCOPCs, had been reduced to below 500 ppm, the sample-specific screening level.

• Site groundwater contained sporadic elevated levels of inorganics (Rounds 1, 2, and 3, only).Similar analytes were detected during the soil removal action. This suggests that soilcontamination, particularly from lead, was mobilized prior to the soil removal action, and hadmigrated vertically to the underlying groundwater. There were no exceedances of the inorganicscreening criteria for Round 4 sampling. Any residual concentrations of metals remaining insite soils since the removal action and those sporadically-detected in groundwater are expectedto attenuate naturally through adsorption and dilution, respectively.

• Site-related inorganic contaminants were not detected above Federal primary drinking waterstandards in the off-site private/municipal wells or downgradient spring/seeps sampled. Alaboratory detection limit of 10 u.g/1 was used for analyses of VOCs; this detection limit isabove the MCL for some compounds. Nonetheless, levels of VOCs were not detected above10 ug/1 and are not known historically to be a concern at the V&M site. Drinking water qualityin side gradient supply wells is not threatened by site-derived contaminants.

RECOMMENDATIONS FOR FUTURE WORK

The conclusions of this RI indicate that contaminated soils in the former on-site burn areas have beenremoved. Therefore, there is very little further contribution of contaminants to groundwater. No furtherwork is recommended at the V&M Site.

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1.0 INTRODUCTION

CDM FEDERAL PROGRAMS CORPORATION (CDM Federal) received Work Assignment Number086-2CODW under the ARCS n program to perform a Remedial Investigation/Feasibility Study(RI/FS), including a Risk Assessment (RA) and to provide Community Relations Support to the UnitedStates Environmental Protection Agency (EPA) for the V&M/Albaladejo site (V&M Site) located inVega Baja, Puerto Rico. In March 1999, the work was transferred to the Response Action Contract(RAC) as work assignment 016-RICO-02DW. The purpose of this work assignment is to investigatethe overall nature and extent of groundwater contamination at the site and to develop and evaluateremedial alternatives, as appropriate.

1.1 PURPOSE OF REPORT

The RI focused on collecting adequate groundwater data to determine if the on-site soil contaminationhad impacted groundwater, and if so, the nature and extent of that contamination. The delineation ofthe contaminated soil source areas was performed by EPA's removal group.

Since no groundwater data existed, the groundwater flow and on-site water quality conditions wereevaluated to determine whether past waste disposal practices at the site impacted groundwater. Thiswas determined through the installation and sampling of on-site monitoring wells, sampling existingoff-site wells, and performing limited vadose zone contaminant transport modeling which determinedwhether past soil contamination was likely to leach to groundwater.

The Risk Assessments consist of an ecological assessment and a limited human-health risk assessment.The ecological assessment evaluated whether residual soil contamination remaining at the site (aftercompletion of the time-critical EPA soil removal action) poses a potential risk to wildlife. The limitedhuman-health risk assessment was performed to determine if the cumulative risk from individualchemicals in groundwater is within the acceptable risk range.

No baseline risk assessment was proposed for soil because the removal action had already beencompleted. Instead, CDM Federal calculated risk-based preliminary remediation goals (PRGs) for soilsbased on standard exposure scenario assumptions to ensure that the soil cleanup levels used in theremoval were protective of human health for current and probable future use scenarios (see Final WorkPlan, CDM Federal, 1997a, Appendix A).

1.2 SITE DESCRIPTION

The V&M Site is located off State Road No. 160, Kilometer 4.2 in the Almirante Norte Ward of themunicipality of Vega Baja, Puerto Rico (Figure 1-1). It is reached via a dirt road extending about 1 milewest from Rt. 160. The site acreage is unknown and consists of two farms. The area is rural andcharacterized by rugged, heavily-vegetated hilly terrain with small farms located in the valleys. Theregion is sparsely populated within a one-mile radius of the site. Fewer than one hundred residents areestimated to live within one-quarter mile of the site.

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The site is located in the limestone uplands of north-central Puerto Rico. This area is characterized bythe distinctive landforms typical of karst terrain, which commonly form in limestone. Classic karstfeatures on-site include steep hills surrounded by small valleys, sinkholes, subsurface channels andcaves. Groundwater flow in karst terrains can be very complex because of the extensive developmentof sinkholes, subsurface channels, caves and springs.

The Aymamon Limestone outcrops at the site, forming karst hills, or "mogotes". The AymamonLimestone contains an extensive network of subterranean channels (locally, as much as eight inches indiameter). Underlying the Aymamon Formation are the Aguada Limestone and the Cibao Formation.These two formations, although reported not to have as extensive channeling, exhibit highpermeabilities due to karst development. Surficial alluvium and sand deposits, along with the limestonebedrock formations, form an unconfined aquifer which supplies most of the water in this region. Waterin the limestone occurs in fractures and solution channels. The sinkholes may provide a directconnection from the surface to the groundwater.

Site History

The V&M site was used for dumping plastic-coated electric cables, electrical equipment, and carbatteries. The wastes were burned to recover the copper, aluminum and lead. No containment (e.g.,berm, liner, etc.) system is known to have been used nor has any been observed. It is not known whenthe burning activity began on either the V&M or the Albaladejo farm properties. Since 1985, one ofthe farm owners reported that trucks entered the site carrying wastes which he believed were generatedby the Puerto Rico Telephone Company and the Puerto Rico Electric and Power Authority. Burningreportedly ceased in 1986 when the V&M farm was purchased by its current owner, but continued into1988 on the Albaladejo farm. The total quantity of waste disposed and burned at the site is unknown.Four historical waste disposal/burn areas were identified (refer to Figure 1-2 and Figure 1-3):

• Zone 1, located on the extreme western portion of the site, was a 3,000 square foot area that cutdirectly into the hillside at the end of a vehicular path.

• Zone 2 was a mounded area, generally about one to two feet above the local grade, with somemounds as high as four to five feet above grade. It covered an area of approximately 2,000square feet and was located north of Zone 1.

• Zone 3 was located in a heavily vegetated area within the large north-south trending sinkholedepression that occupies the center of the site. Two small sinkholes are located within thedepression. Two burn areas were located in Zone 3. One of the burn areas was within one ofthe sinkholes.

• Zone 4, located east of Zone 1, was a cleared area of approximately 4,000 square feet.Historical aerial photographs (EPA, 1997) indicate that the hillside east of Zone 4 was tilled inthe past. Contamination may have been introduced to deeper levels by the tilling.

In March, 1996, based on the results of several sampling events, the EPA Removal Action Branch,Technical Support Section, initiated a sampling event to support the excavation of contaminated soilsand the on-site staging and possible fixation of these soils. Soil samples were collected from Zones 1,

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2, and 4, and field analyzed for copper and lead using X-ray fluorescence (XRF), to delineate thehorizontal extent of contamination in these areas. Estimates from the sampling event suggested thatat least 1,800 cubic yards of contaminated soil was directly beneath the burn residuals.

In March, 1997, EPA's Removal Action Group performed delineation sampling and characterized theburn areas in Zone 3.

Time-Critical Soil Removal Action

EPA conducted a time-critical soil removal action from January through March, 1998. Based on theEPA's 1996 and 1997 sampling results, contaminated soils were excavated from targeted areas. Thecontractor marked all sample points that the Geoprobe subcontractor was going to collect. Soil coresamples were analyzed for lead utilizing a Spectrace 900 XRF spectrometer to delineate the verticalcontamination at the site.

Geoprobe core samples were collected from surface sample points in all burn zones with surface leadreadings above the EPA action level of 500 parts per million (ppm). Sample locations were mappedout with a grid spacing of 25 feet across the areas of contamination. As the core samples were collectedthey were cut into sections to represent the zero to three (0-3), three to six (3-6), six to nine (6-9), nineto twelve (9-12), and twelve to eighteen (12-18)-inch horizons below ground surface (bgs). The 3-6inch soil core samples were analyzed first with the XRF; if the results were below the 500 ppm sitescreening level, then the 0-3 inch soil core sample was analyzed. If the results were above 500 ppmthen the 6-9 inch sample was analyzed. If this unit was contaminated, screening of deeper soil horizonscontinued down to the 9-12 inch or 12-18 inch intervals or until XRF results below 500 ppm werefound. In all areas, excavation continued until analytical results indicated that lead levels were belowthe site-specific screening level of 500 ppm of lead. Ten percent of screening soil samples also werecollected for lead analysis at an EPA Contract Laboratory Program (CLP) laboratory for confirmatoryresults. The CLP results were generally comparable to the field XRF results.

Contaminated soils were stockpiled and stabilized on-site in a designated area prior to their removaland proper disposal. CDM Federal reviewed the sampling trip report which included clearance testingdata and associated site location maps for burn zone surface soil samples (Roy F. Weston, 1999). Acopy of Weston's XRF sampling trip report, and selected maps showing soil sampling locations areprovided in Appendix B.

In February 2000, the EPA Removal Action Branch returned to the site and collected 17 surface soilsamples in areas just outside of the excavation zones, in native soils. The samples were collected from0-6 inches and analyzed for full target analyte list (TAL) metals. Samples were collected around fiveburn areas, with two at Burn Area 1; two at Burn Area 2; four at Burn Area 3; four at Burn area 4; andfive at Burn Area 5. Three background samples were also collected; one from each of Burn Areas 1,4, and 5. No duplicate samples were collected. No associated field blank data were provided. Sampleswere analyzed through a CLP laboratory and validated by EPA.

Two samples had detections of lead above the 500 ppm action level: VMA2-02 in Burn Area 2 andVMA4-03 in Burn Area 4. In May 2000, EPA collected additional surface soil samples around eachof the sample locations with elevated lead results, using XRF to screen the samples prior to submission

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to the CLP laboratory for lead analysis. One sample was elevated, but sampling around this locationindicated it was a unique occurrence and the elevated level was not repeatable. The February surfacesampling results were used in the screening level ecological risk assessment. The results from theFebruary and May sampling are included in Appendix B, along with the May 2000 Trip Report.

1.3 REPORT ORGANIZATION

Executive Summary - provides a synopsis of the investigations conducted and their results.

Chapter 1

Chapter 2

Chapter 3

-—' Chapter 4

Chapter 5

Chapter 6

Chapter 7

INTRODUCTION - presents the regulatory framework for performing the RI andsummarizes the objectives of the RI. It provides an overview of the study area and site,including descriptions and summaries of past on-site waste disposal. The chapter alsodescribes closure and removal action investigations and presents the organization of theremainder of the report.

STUDY AREA INVESTIGATION - describes the methodology and sampling rationalefor the various investigations that were conducted for the RI.

PHYSICAL CHARACTERISTICS OF THE STUDY AREA - briefly describes thephysical attributes of the study area, including surface topography, meteorology, surfacewater hydrology, geology, hydrogeology, and soil types. Sections on demography, landuse, and ecology describe the potential populations and habitats of human and ecologicalreceptors.

NATURE AND EXTENT OF CONTAMINATION - lists the groundwater action levelsagainst which site data were screened to determine the extent of contamination;discusses the quality and usability of analytical data obtained during the investigation;and describes the type and extent of contamination determined to be present.

CONTAMINANT, FATE, AND TRANSPORT - evaluates the persistence and mobilityin the environment of various types of contaminants identified, and summarizes the fateand transport mechanisms that apply to the site.

SUMMARY AND RECOMMENDATIONSdeterminations of the remedial investigation.

REFERENCES

summarizes the significant

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2.0 STUDY AREA INVESTIGATION

This section provides an overview of the procedures conducted for the RI and their rationale. TheProcedures were carried out in accordance with the approved Final Work Plan (CDM Federal, 1997a)and Final Project Operation Plan (POP) (CDM Federal, 1997b). Deviations from procedures arepresented in Appendix A.

2.1 SURFACE FEATURES

Prior to initiating field activities, the site was surveyed and a topographic site base map was createdfrom the USGS digital topographic data for the area. A survey of the locations and elevations of allmonitoring wells installed during the RI was conducted by Caribbean Aerial Surveys, Inc, a licensedPuerto Rico surveyor. Procedures used during the survey and for the generation of the site base mapwere in accordance with the CDM Federal surveyor's statement of work (SOW). Refer to Section 3.1for a description of the topographic nature of the site.

As stated in the Final POP (CDM Federal, 1997b), if contamination was encountered in on-sitemonitoring wells, a man-made features survey would be conducted. The man-made features survey wasto create a map identifying man-made features in the site's vicinity that potentially could affectgroundwater quality in downgradient off site wells or surface waters, such as landfills, fuel facilities,sewage treatment impoundments, or other sites that might affect downgradient water quality. Ifcontamination was found in existing downgradient off-site wells or surface springs/seeps, the surveywould be used to assess whether the detected contamination could be attributable to the site or to someother man-made feature.

As sporadic groundwater contamination was detected in the on-site monitoring wells, a man-madefeatures survey was not conducted.

2.2 CONTAMINANT SOURCE INVESTIGATIONS

In March, 1996, based on the results of several sampling events, the EPA Removal Action Branch,Technical Support Section, initiated a sampling event to support the excavation of on-site contaminatedsoils and the on-site staging and possible fixation of these soils (refer to Section 1.2 for a descriptionof the EPA soil removal activities and sampling results).

2.3 METEOROLOGICAL INVESTIGATION

The meteorological investigation consisted of obtaining and reviewing published reports andsummarizing the applicable information. The additional climate statistics and meteorological data wereobtained to support the RI/FS surface water and groundwater investigations. CDM Federal obtainedinformation from the following sources:

Luis Munoz Marin International AirportDomingo Ruiz AirportRoosevelt Roads Naval ReservationU.S. Coast Station

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U.S. Geological Survey (Gomez-Gomez, 1988)Weather Channel (www.weather.com/weather/int/cities/PR_San_Juan.html)Excite Weather Almanac (www.excite.com/weather/weather_almanac/?almanac=78526

Information obtained from these sources is summarized in Section 3.2.

2.4 GEOLOGICAL INVESTIGATIONS

The geological investigations consisted of obtaining and reviewing published reports and summarizingthe applicable information. In addition, CDM Federal conducted the following on site subsurfaceinvestigations as part of installing monitoring wells.

2.4.1 MONITORING WELL INSTALLATION

2.4.1.1 Soil Boring

At each of the six on-site monitoring well locations, CDM Federal drilled soil borings down to thebedrock surface. Soil borings were drilled to determine the depth to bedrock, thickness andcomposition of unconsolidated soils at the site. Split spoon samples were collected continuously at 2-foot intervals and the lithology was recorded. Refer to Section 3.4 for a description of the on-site soilcharacteristics.

2.4.1.2 Bedrock Coring

Two monitoring wells (MW-3 and MW-5) were cored throughout their entire length to obtain a detailedgeological description of the bedrock geology. The purpose of collecting rock cores was to determinethe site stratigraphy and to characterize the nature of fracture porosity beneath the central sinkhole(MW-3) compared with the porosity of bedrock in adjacent rocks that may have not undergone the samedegree of dissolution (MW-5). The cores were logged by a qualified geologist and described by rocktype, color, stratification, hardness, grain size, fracturing, secondary porosity, mineralization, etc. Thesedescriptions aided the evaluation of contaminant transport at the site. Refer to Section 3.4 for the resultsof the on-site soil boring and bedrock coring program and Appendix C for the graphic soil boring andbedrock core logs.

2.4.1.3 Geophysical Borehole Logging

Downhole geophysical logging was conducted at each monitoring well following drilling. The lengthof each borehole was first logged using a caliper tool. The caliper log gave a record of the averagediameter of the borehole and indicated the location of anomalous voids or gaps in the limestone. Largevoids in the limestone increase the volume of materials (gravel, bentonite, and grout) needed to seal upthe annular space and construct an acceptable monitoring well. In addition to aiding monitoring wellcompletion, the caliper log provided useful information pertaining to the structure and integrity of thelimestone and the nature of fractures in the logged interval.

Installed monitoring wells also were logged using a natural gamma tool. Natural gamma radiation isnot affected by the well casing and logging therefore was performed after the well casings had been

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installed. Downhole gamma logging is a geophysical investigation tool which can indicate the extentof clay in the formation surrounding the borehole. The technique supplements the characterization ofsite geology, by indicating the presence of clay layers which may not have been observed in samplescollected with split spoons, cuttings, or core samples. Since clay layers may act as barriers to downwardmigration, which can significantly impact contamination migration pathways, it was important toidentify them.

Based on published reports, low-permeability layers may be encountered within the Aguada Formation.The natural gamma logs were correlated with the two bedrock cores and provided valuablesupplemental data for the boreholes in which coring was not performed. Refer to Section 3.4 for theresults of the downhole geophysical logging program.

2.5 VADOSE ZONE MODELING

Preliminary fate and transport modeling was conducted to evaluate whether the historical contaminantlevels in site soils would be likely to result in associated groundwater contamination at levels ofconcern. Since very little was known about the subsurface conditions at the V&M site prior to drilling,a screening level model was used to estimate concentrations in soil that could result in FederalMaximum Contaminant Level (MCL) exceedances in groundwater.

The model was defined by the "Migration to Groundwater" pathway equation and methodology inEPA's "Soil Screening Guidance" (EPA, 1996). The major assumptions include equilibriumpartitioning 6f a compound between soil and water, and complete and instantaneous groundwatermixing. Input included such factors as infiltration rate, partition coefficients, aquifer thickness, andeffective porosity. Partition coefficients are usually not site specific and are selected based on literaturevalues and aquifer/soil properties at the site.

Sinkholes typically contain thicker deposits of "blanket sands" than the areas surrounding them. Basedon literature and CDM Federal's experience in karst terranes, it was reasonable to assume that the depthto bedrock within the sinkholes was up to tens of feet thick. Water recharged through sinkholes can betransported vertically in two ways: via a direct route through solution channels and fractures; and viaslower percolation through deposits which have filled in the sinkhole cavity. Water most likelyinfiltrates and reaches the water table via a combination of the two. The modeling was conducted onthe assumption that slow percolation dominates the transport mechanism through the unsaturated zone.

During their March 1997 field work to delineate contamination in the central Zone 3 sinkhole, EPARemoval Action Branch personnel collected soil physical characteristics data to be used by CDMFederal for the contaminant migration modeling. Two soil samples were collected from each of threetest pits in contaminated areas in the sinkholes: surface soils from depths of 0-2 feet and subsurfacesoils from 2-4 feet. Samples were analyzed for the following parameters: bulk density, fraction oforganic carbon, moisture content, porosity, grain size distribution by hydrometer analysis, oxidationreduction potential (Eh), and pH. These data were used as site-specific input for the modeling.

The unsaturated zone modeling included a sensitivity analysis to determine which parameters are mostlikely to control the leaching of contaminants into groundwater. Results presented in Section 3.6 areconservative and focus on evaluating the potential for groundwater contamination.

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2.6 ON-SITE SURFACE RUNOFF SAMPLING

Although proposed in the Final Work Plan (CDM Federal, 1997a), no on-site surface runoff sampleswere collected during or immediately after a rainstorm. The samples were to be collected from thesurface runoff pathway between the Burn Areas and the sinkholes. The samples would have been usedto assess if surface runoff is providing a contaminant pathway between the Burn Areas and sinkholes.

After discussions between EPA and CDM Federal, the decision was made not to sample surface runoffbecause impacted soil at the Burn Areas, along the runoff pathway and within the sinkhole, had beenremoved by the EPA Removal Action Branch. Confirmation soil sampling along the runoff pathwayswas performed within these areas at that time (sample trip report, Roy F. Weston, 1999), before theexcavated soils were replaced with clean fill.

2.7 QN-SITE SEDIMENT SAMPLING

According to the Final Work Plan (CDM Federal, 1997a), on-site sediment samples were to be collectedduring or immediately after a rainstorm; they were to be collected in association with the surface watersamples from a sink hole depression previously observed in the Zone 3 karst valley, prior to the removalaction. Samples were be used to determine if the area had been impacted by surficial runoffcontaminated with metals. As all natural sediments had been removed from the karst valley during theremoval action and replaced with clean fill, with the approval of the EPA, the decision was made notto collect sediment samples.

2.8 GROUNDWATER INVESTIGATION

2.8.1 ON-SITE MONITORING WELL INSTALLATION AND SAMPLING

2.8.1.1 Monitoring Well Installation

CDM Federal installed six monitoring wells at the V&M Site. The wells were installed at locations to:1) determine the groundwater flow direction away from the site; 2) determine the bedrock geology andstratigraphy beneath the site; 3) collect groundwater samples to determine if soil contaminationimpacted groundwater beneath the site; and 4) serve as long-term monitoring wells for the site duringthe remedial action period, if found to be necessary. The wells were installed between January andMarch, 1998; drilling was performed by Soil Tech Corporation, the CDM Federal drillingsubcontractor.

Figure 2-1 illustrates the locations of the monitoring wells, including lines of geological cross sectionspresented in Figures 3-6 and 3-7. Figure 2-2 illustrates the locations of the site monitoring wells inrelation to the burn areas/soil removal action zones. Three monitoring wells (MW-1, -2, and -4),located on the northern margin of the study area, were installed to monitor groundwater downgradientof the two large depressions at the site. MW-1 is also downgradient of Zone 1 and 2 burn areas. Figure2-2 shows the locations of the monitoring wells in relation to burn areas where soil had been removedduring the Removal Action. One well (MW-3), located within the site's large central depressioncontaining sinkholes, was located to monitor groundwater beneath the sinkholes; this is an area in whichcontaminated runoff may have entered the aquifer. Two monitoring wells (MW-5 and MW-6) were

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located upgradient (south) of the burn areas (contaminant source areas).

Monitoring wells were drilled using the hollow stem auger method through the surficial unconsolidatedsoils down to the bedrock, and by the air rotary method through bedrock down to approximately 20 feetbelow the water table. Two monitoring wells were cored throughout their entire length. All drilling,well installation and completion, and well development, were performed in accordance to the FinalPOP (CDM Federal, 1997b), Section 5.8. Figure 2-3 illustrates a schematic diagram for the monitoringwell construction. With the approval of EPA, the well screens were recommended to be 20 feet insteadof the more usual screen length of 10 feet to give a better chance of intercepting water bearing fracturesor solution openings. In addition, the water table was expected to fluctuate more than 10 feet betweenthe wet and dry seasons. Therefore, 20-foot screens ensured that the well will not be dry during dryseason sampling. Based on the geophysical logs, the screens are installed in zones that are not highlyfractured or solutioned limestone. Well construction specifications for each of the six on-sitemonitoring wells are presented in Table 2-1 and illustrated in Appendix D.

2.8.1.2 Monitoring Well Sampling

Groundwater samples were collected from the six RI monitoring wells to determine the nature andextent of contamination, and to provide data to support a human health risk assessment. Water qualitydata from the two upgradient on site wells (MW-5 and MW-6) were compared with an existingupgradient residential well in Almirante Sur to determine background water quality characteristics(Section 4.3).

Four rounds of groundwater samples were collected for data comparison and confirmation (Table 2-2).The first on-site sampling event occurred during the week of March 29, 1998 (Round 1), the secondoccurred during the week of May 18, 1998 (Round 2), the third during the week of September?, 1998(Round 3), and the fourth during the week of November 9, 1998 (Round 4). All groundwater sampleswere analyzed through a CLP laboratory, strictly following CLP methods and protocols.

For Round 1 sampling, the groundwater samples were analyzed by the CLP laboratory for the full suiteof target compound list (TCL) organic constituents, TAL inorganic constituents, pesticides and PCBs.Upon review of the laboratory results, the analytical fractions were eliminated from subsequent roundswhen no compounds were detected (refer to Table 2-3). For example, no pesticides/PCBs were detectedin Round 1 results. This fraction was not analyzed in Round 2. No SVOCs were detected in Round 2,so this fraction was eliminated in Round 3. No VOCs were detected in Round 3, so only TAL metalswere analyzed in Round 4.

To assess contaminant fate and transport, additional water quality parameters were analyzed by the EPADivision of Environmental Science and Assessment (DESA) laboratory during Rounds 1 and 2, andincluded: total dissolved solids (TDS); total suspended solids (TSS); nitrate/nitrite; sulfate; chloride;and alkalinity. Refer to Section 4.2 for the analytical results of the monitoring well sampling program.Water quality parameters measured in the field during the four sampling rounds are presented inAppendix E.

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Round 1

In three of the wells (MW-1, MW-2, and MW-5) in Round 1, groundwater samples were collected usingthe low-flow, minimal drawdown sampling method, as described in the EPA SOP, "Ground WaterSampling Procedure, Low Stress (Low-Flow) Purging and Sampling", dated March 16, 1998 (finalversion). Groundwater sampling was conducted using adjustable rate, positive displacement pumps inorder to first purge stagnant water from the target depth in each well at a rate that matches the aquiferrecharge rate. Each well was purged or bailed until water quality parameters (temperature, pH, specificconductance, salinity, dissolved oxygen, Eh, and turbidity) had stabilized. Turbidity was measured witha goal of attaining 5 to 10 nephelometric turbidity units (NTUs) for water clarity. However, accordingto the Puls and Barcelona guidance, natural groundwater may not reach turbidity levels as low as 10NTUs. So, if the remaining water quality parameters had stabilized and all steps had been taken toreduce turbidity, when the turbidity readings stabilized, the sample was collected and the final turbiditymeasurement was recorded.

Samples collected with the low flow method were collected with minimal turbulence directly from thededicated Teflon-lined polyethylene tubing. This method of sampling produces samples with lesssuspended solids than other groundwater sampling methods. Water quality parameters also werecollected during bailing of wells and the data were recorded in the field notebook.

In Round 1, due to technical difficulties with the semi-submersible pump and converter control box,only three of the six monitoring wells utilized the low-flow purging and sampling technique . MW-3and MW-4 were purged using a decontaminated 3-inch diameter bailer and sampled using disposableTeflon bailers. A semi-submersible pump was used to purge monitoring well MW-6 and a disposableteflon bailer was used to sample the well.

The CLP inorganic analytical results revealed lead and zinc detections in a field blank (rinsate) samplecollected from the semi-submersible pump (used to sample MW-1, MW-2 and MW-5 only) weregreater than their contract required detection limits (CRDLs), indicating the field blank sample had beencontaminated due to inadequate decontamination procedures. Unfortunately, as the validator assumedall groundwater samples were collected using a semi-submersible pump, all positive results that wereless than five times the field blank value of 6.3 ug/1 for lead and 50.1 ug/1 for zinc were rejected,including those samples collected with disposable bailers. The samples from MW-2, MW-3, MW-4,MW-5, and MW-6 were rejected for lead, and samples from MW-1 and MW-4, MW-5, and MW-6 wererejected for zinc.

In a letter to EPA (dated October 28, 1998), COM Federal requested that the values for lead and zincin MW-3, MW-4, and MW-6 be re-validated for use in the RI report. Subsequently, EPA determinedthat these data are valid results for lead and zinc.

Round 2

Groundwater samples from all monitoring wells in Round 2 were collected using the low-flow, minimaldrawdown sampling method as described in the EPA SOP.

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Lead results for all wells in Round 2 were rejected due to laboratory data invalidation ( matrix spikerecovery greater than 150%).

Round 3

For the Round 3 sampling event, a modified sampling method was proposed and conducted as per averbal agreement with EPA in an attempt to eliminate potential data rejection due to equipment cross-contamination during sample collection. Samples from all wells except MW-4 were collected withdedicated decontaminated Teflon bailers after purging with a submersible pump per the low-flowmethod. The sample collected from MW-4 was collected through the submersible pump per the low-flow method.

The lead result from MW-4 was rejected due to contamination of its associated field blank.

Round 4

Samples from all wells in Round 4 were collected with dedicated decontaminated Teflon bailers afterpurging with a submersible pump per the low-flow method. All analytical results were valid.

2.8.2 OFF-SITE GROUNDWATER SAMPLING

Off-site groundwater well sampling was conducted in December 1997 (hereafter referred to as the Pre-Round sampling event) to provide ambient water quality data for the RI and the risk assessment.Sampling was to characterize downgradient and off site water quality in private and public wells withina 1.5-mile radius of the site. Five supply and agricultural/industrial wells that were potentiallydowngradient of the site were sampled (Figure 2-4 and Table 2-4). The results of groundwater flowmapping, completed after the December 1977 sampling, indicate that the five potentially downgradientwells are actually more side gradient to the V&M groundwater flow (Figures 2-4 and 3-8). In addition,one residential well (WDD) located upgradient of the site was sampled to characterize backgroundwater quality conditions and to be compared with on-site upgradient monitoring wells (MW-5 and MW-6). The following wells were sampled during the week of December 1, 1997.

Supply WellsAlmirante Norte No. 2Almirante Norte No. 3Arraiza

Residential WellDiego Davila (WDD)

Agricultural/Industrial WellsAgro-Industri FrescuraAristides del Pozo

Groundwater samples were collected according to CDM Federal SOP 1-9. Once a tap was locatednearest the well head, the tap was run for five minutes to purge the service line. During purging of the

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well, temperature, conductivity, and pH measurements were taken at approximately one-minuteintervals. The system was considered adequately purged when the temperature, conductivity, and pHreadings stabilized within 10% for three consecutive readings.

After purging the supply system, CDM Federal collected samples directly from the tap. Samples wereanalyzed by the EPA CLP laboratory for full TCL/TAL parameters, including low-detection levelVOCs. To assess contaminant fate and transport, additional water quality parameters were analyzedby the EPA DESA laboratory for TDS; TSS; nitrate/nitrite; sulfate; chloride; and alkalinity. Refer toSection 4.3 for the analytical results of the off site well sampling program which was conducted inaccordance to the Final POP (CDM Federal, 1997b).

2.8.3 SYNOPTIC WATER LEVEL MEASUREMENTS

To gain the necessary information concerning hydraulic gradients and flow paths, synoptic (relativelysimultaneous) water level measurements were collected from all monitoring wells prior to sampling.Three rounds of synoptic water levels were collected from the six newly installed monitoring wells.The first measurement round was completed on March 29, 1998 and was performed during the annualdry season. The second round of water levels were measured on May 18, 1998, prior to the secondround of groundwater sampling, between the dry season and wet season. The third round ofmeasurements occurred on November 9, 1998, prior to the fourth round of sampling, during the wetseason.

Synoptic water level measurements were collected in accordance to the Final POP (CDM Federal,1997b), Section 5.5.1. For each well, CDM measured static water levels to the nearest 0.01-foot fromthe top of inner riser casing of all wells using a water-level indicator. All measurements were from thesurveyor's mark, a groove filed into the riser, and were entered in the field logbook. The time, depthto water, total depth of well, and remarks were recorded in their appropriate columns. Refer to Section3.5 for the results of the synoptic water level measurement program.

2.8.4 CONTINUOUS WATER LEVEL MEASUREMENTS

To evaluate the nature of recharge to the water table aquifer, CDM Federal continuously monitoredwater levels in three of the six RI monitoring wells (MW-1, MW-4, and MW-6). Continuousmonitoring occurred during the dry season from March 10 to March 29, 1998. The purpose of themonitoring was to establish whether the monitoring wells are monitoring "diffuse" flow or "conduit"groundwater flow in the vicinity of the sinkholes, or both. The data would also suggest the "optimal"times to sample groundwater during future monitoring. For example, if a well showed a "flashy"response, this would indicate that recharge is concentrated and groundwater samples should be collectedduring, or shortly after, a storm event. Otherwise, samples from the same well may not be representativeof what is potentially released to groundwater. The continuous water level data was evaluated prior toinitiating the second round of groundwater sampling. The results of the continuous water levelmonitoring are discussed in Section 3.5.

Continuous water level measurements were collected with In-Situ Inc. Troll 4000 Logger/Probes inaccordance with the Final POP (CDM Federal, 1997b), Section 5.5.2.

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2.9 SPRING/SEEP SURVEY AND SAMPLING

The Final Work Plan (CDM Federal 1997a) stated that spring/seep sampling of the Rio Indio was acontingency event that would only occur if on-site groundwater was found to be contaminated or ifvadose zone modeling indicated a high probability that contaminants had leached to groundwater. Afterdiscussions between EPA and CDM Federal, the decision was made to sample spring/seep samplesduring the spring/seep reconnaissance survey.

Prior to the field reconnaissance, aerial photographs of the V&M Site and surrounding area werereviewed to identify potential spring/seep locations along the Rio Indio that could be connected viaconduit flow to the site's sinkholes and other dissolution structures suspected to be contaminant sourceareas.

In December 1997, as part of the Pre-Round sampling event, CDM Federal conducted a fieldreconnaissance along the Rio Indio River north from the intersection of the river and State Rt. 646 toAlmirante Norte. The spring/seep survey was conducted in accordance to the Final POP (CDMFederal, 1997b, Section 5.6). At the time of project planning, it was anticipated that up to fivesprings/seeps would be identified and sampled. Instead, only two springs/seeps were identified possiblydue to the dry and low flow conditions that occurred during the field reconnaissance survey period.Refer to Figure 2-5 for the locations of the two spring/seeps sampled.

A second attempt to sample the springs/seeps was conducted on March 31,1998 during the first roundof on-site groundwater sampling. However, no water was available to sample from the previously-identified springs/seeps. During a third attempt to sample the spring/seeps conducted on May 21,1998,a spring/seep sample was collected from one of the two springs previously sampled during the Pre-Round event. Sediment samples were not collected because the springs issue directly from limestonerock, with no accumulation of sediment. In addition, the immediate stretch of river near the springdischarge area accumulates little sediment. All spring/seep samples were collected without knowledgeof the on-site groundwater analytical results and any vadose zone modeling interpretations. Table 2-5is a summary of the spring/seep sampling program.

It was decided that further sampling of the spring/seeps during field events three and four was notnecessary as the spring/seep sampling results had not detect contamination (refer to Section 4.4 foranalytical results).

Spring/seep water samples were analyzed by the EPA CLP laboratory for full TCL/TAL parameters,Pesticides/PCBs, including low-detection level VOCs. Water quality parameters (temperature, pH,specific conductance, salinity, dissolved oxygen, Eh, and turbidity) also were measured in the fieldduring sampling. To assess contaminant fate and transport, additional water quality parameters wereanalyzed by the EPA DESA laboratory for TDS; TSS; nitrate/nitrite; sulfate; chloride; and alkalinity.Refer to Section 4.4 for the analytical results of the spring/seep sampling program which was conductedin accordance to the Final POP (CDM Federal, 1997b).

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2.10 MAN-MADE FEATURES SURVEY

As stated in the Final POP (CDM Federal, 1997b), if contamination was encountered in on- sitemonitoring wells, a man-made features survey would be conducted. The man-made features survey wasto create a map identifying man-made features in the site's vicinity that potentially could affectgroundwater quality in downgradient offsite wells or spring/seeps. Man-made features such as landfills,fuel facilities, sewage treatment impoundments, or other sites that potentially might affect downgradientwater quality would be identified. If contamination was found in existing downgradient off-site wellsor springs/seeps, the survey would be used to assess whether the detected contamination would beattributable to the site or to some other man-made feature.

As groundwater contamination was detected only sporadically in the on-site monitoring wells, a man-made features survey was not conducted in accordance with the Final POP, Section 5.7 (CDM Federal,1997b).

2.11 DEMOGRAPHY AND LAND USE

The Demography and Land Use investigation consisted of obtaining and reviewing published reportsand summarizing the applicable information. In particular, CDM reviewed and relied upondemographic and land use data presented in the Site's Final Hazard Ranking Documentation (MalcolmPirnie, 1996). Refer to Section 3.7 for a description of the Demography and Land Use within the Site'svicinity.

2.12 ECOLOGICAL ASSESSMENT

CDM Federal performed a post-soil removal site walkover in May 1998. The purpose of the sitewalkover was to document the current site conditions within the soil removal areas. Ecologicalconditions at the V&M site were observed by the CDM ecological risk assessor. The CDM Federalassessor documented site habitat conditions and potential wildlife usage to determine possibleecological receptors. Commonwealth agencies also were consulted and a literature search wasconducted to identify potential rare, threatened or endangered species in the vicinity of the site. Anecological risk assessment has been conducted for the site as a separate document. Refer to Section 3.8for a brief description of the site's biota and environmental resources.

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3.0 PHYSICAL CHARACTERISTICS OF STUDY AREA

This section describes the regional and site-specific geography, geology, and hydrogeology as presentedin published reports and the RI field program. Regional geological and hydrogeological conditions arereproduced from USGS published reports. No field investigations were performed to confirm theaccuracy of the reports.

3.1 SURFACE FEATURES

The site is part of the doline karst terrain of the North Coast Limestone Province (NLP) (Monroe, 1976).The topography of the site's vicinity is presented in Figure 3-1. In general, the area consists of anorthward sloping limestone plateau that has been dissected by the entrenched course of the northward-flowing Rio Indio, which has cut a narrow valley floor flood plain. The limestone plateau becomesprogressively more deeply weathered and dissected closer to the river valley and becomes lower inelevation towards the coastal plain several miles to the north.

The topography of the site is characterized by large-scale karst weathering and dissolution features(LaFleur, 1999), including closed drainage depressions, sinkholes (dolines) and rugged limestone hills(mogotes). According to the United States Geological Survey (USGS) 7.5 minute Manati Quadrangletopographic map (Figure 3-1) and the site survey map (Figure 2-1), the general base elevation of the siteis about 60 meters (or ±200 ft.) above mean sea level (amsl). The elevations of some of the surroundingmogotes are 100-125 meters amsl (±410 ft. amsl). The predominant site feature is a large elongated,approximately north-south trending, depression which contains at least two sinkholes. This depressionreceives drainage from the majority of the site. Several smaller, circular sinkholes are present in the.northern and western parts of the site (Figure 1-2). Individually, the sinkholes may be up to 20 meters(±60 ft.) below the general base elevation of the site.

Soil Bum Zones 2, and 4 were upgradient of the large elongated on-site depression (Figure 1-2). Zone3 occurred within the central part of the depression itself, within one of the sinkholes and in closeproximity to one other. Zone 1 appeared to drain to a small depression, possibly an incipient sinkholeimmediately west of Zone 2. Thus, surface water runoff potentially transported contamination into thesinkholes and into the underlying aquifer.

3.2 METEOROLOGY

The town of Vega Baja is located in the north central area of Puerto Rico where the climate is tropicalhumid. The island is located in the pathway of nearly constant easterly trade winds. A strongorographic effect causes the North Coast Province to be an area of high rainfall, averaging 70 inchesper year (Gomez-Gomez, 1980). A dry season extends from January to April and the wet season fromSeptember to December. The average temperature ranges from 23°C (74°F) in the winter to 27°C(80°F) in the summer. A high evapotranspiration rate results from high temperatures and the constantwinds. Figure 3-2 is a graph that illustrates the seasonal fluctuations in average temperatures andprecipitation.

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3.3 SURFACE WATER HYDROLOGY

As with most limestone karst scenery, surface water flow in the region is largely confined to rivers (e.g.,the Rio Indio to the northwest of the site). The development of secondary drainage patterns is limitedto areas of thin, blanket deposits of low permeability where rapid surface runoff is favored. Based onregional water table potentiometric surface information, the Rio Indio appears to be a gaining river closeto the site and groundwater discharges to the river contribute to its baseflow (Gomez-Gomez and Tores-Sierra, 1988). At its closest position, the Rio Indio is located about 0.4 miles to the north of the site.

Heavy rainfall, coupled with dense, clayey surface deposits tend to favor stormwater surface runoffrather than its downward percolation through surficial deposits or bedrock at the burned areas. Sincethe on-site sinkholes are at elevations below the burn areas, stormwater runoff flows quickly to theselow-lying areas. Standing water has been observed in the area on several occasions during the fieldinvestigation. The presence of standing water is evidence that downward percolation of surface waterinto the subsurface is retarded by dense, clayey blanket deposits within the sinkhole.

3.4 GEOLOGY

3.4.1 REGIONAL GEOLOGY

Puerto Rico is divided into three geologic provinces, an older Cretaceous-age central volcanic-plutonicprovince trending east to west and two younger Tertiary limestone provinces along its northern andsouthern coastal margins; the V&M Site is situated in the region of Vega Baja, and lies within theNorthern Limestone Province (NLP). Figure 3-3 is a generalized geological formation outcrop map forthe area. The stratigraphic column showing the formations encountered in the subsurface is presentedon Figure 3-4. For the purposes of this study, the bedrock stratigraphy constructed by Rodriguez-Martinez (1995) has been adopted.

The bedrock formations relevant to the RI are a series of late-middle Tertiary-age (early Miocene)limestones consisting of the Aymamon Limestone, which forms the rugged doline hills at the site; theAguada Limestone, which is encountered in the subsurface below the Aymamon Limestone and insinkholes; and the underlying Cibao Formation, the upper member of which likely acts as a lowerconfining unit (Figure 3-4). The site is located near the east-west trending outcrop of the conformablecontact between the lower portion of the early Miocene Aymamon Formation and upper part of the earlyMiocene Aguada Formation (shown on Figure 3-3). A generalized north-south geologic cross-sectionof the NLP through the Vega Alta area, a few miles east of the V&M Site, is shown in Figure 3-5. Thelimestone sequence has a general east-to-west strike and dips gently to the north at 1-6 degrees.

Overlying the limestones in some areas of the NLP are Quaternary clastic deposits consisting of reddishclays or sandy clays and sands. This unit, commonly termed "blanket deposits", ranges in thicknessfrom 0 to 100 feet. In addition, Recent alluvial deposits also are found along major river valleys,including the Rio Indio.

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3.4.2 LOCAL GEOLOGY

As part of this RI, CDM Federal conducted a limited subsurface investigation which involved split-spoon soil sampling, bedrock coring, and down-hole geophysical logging during the installation ofmonitoring wells at the site. Soil data were collected for all six wells; in MW-3 and MW-5 CDMFederal also collected bedrock core data from the bedrock surface to total depth. Bedrock cores weredescribed down to approximately 90 feet amsl in MW-5 and down to approximately 60 feet amsl inMW-3. Interpretative geological cross sections were created using data collected during soil boring,bedrock coring, and geophysical logging of the newly installed wells. The traces of geologic crosssections A-A' and B-B' are shown in Figure 2-1. The lines of section are from the northeast tosouthwest in Figure 3-6 (A-A') and from northwest to southeast in Figure 3-7 (B-B'). The crosssections intersect at the central sinkhole depression.

The presence of sinkholes within and in the vicinity of the V&M Site is evidence that the Aymamonand Aquada limestones have undergone karstification. Three lithologic units were identified at the Siteand include: 1) Rock Outcrop-Blanket Deposits; 2) the Aymam6n Formation; and 3) the AguadaFormation. Appendix C presents the soil boring logs for all six monitoring wells and core logs for MW-3 and MW-5.

3.4.2.1 Rock Outcrop-Blanket Deposits

Surface soils at the site belong to the Rock Outcrop-Blanket Deposits unit which consists of areas ofexposed weathered limestone bedrock and areas of Quaternary unconsolidated overburden deposits ofmarine or unknown depositional origin.

Soil boring logs from split-spoon sampling and gamma ray logs were studied for the six on-site wellsto characterize the nature of the unconsolidated overburden or "Blanket" deposits (Briggs, 1966). Eachmonitoring well gamma ray curve has a relatively high response within the overburden sections,reflecting the relatively high clay mineral content of the unconsolidated soils and clayey sand deposits.The top few feet of soils commonly contain rootlets and other organic detritus. The soils have a lowwater-holding capacity and have a relatively low permeability, allowing rapid surface runoff.

In several wells charcoal beds occur at regular intervals throughout the soil boring, possibly evidenceof ancient forest fires in the area. Soil borings into the overburden sediments also identified commonly-occurring breccia horizons containing angular limestone clasts within a sand or clay-rich matrix. Thelimestone clasts may have been derived from debris flows or avalanches from the gravity collapse ofintensely weathered limestone doline hills (magotes) which characterize the study area (Monroe, 1976).Depth to the overburden/bedrock interface varies greatly across the V&M Site. The well data indicatethat soils within the central sinkhole depression are at least up to 50 feet thick (as in MW-3 and MW-5);soil boring data from locations outside the depression show the overburden to be less than 20 feet,averaging about 16 feet deep (in MW-1, MW-2, MW-4, and MW-6). Generally, the bedrock contactis rubbly, overlain by a limestone regolith several feet thick. In the cored wells, the effects of chemicalweathering are observed in the bedrock up to 30 feet below the weathered regolith, indicating theinfiltration of meteoric waters into the bedrock vadose zone is considerable.

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3.4.2.2 Avmamon Formation

Core data indicate the Aymamon Formation is a relatively pure, massively-bedded, dense to finelycrystalline, coral-rich limestone. According to Monroe (1980), the formation it is up to 650 feet thickwhere it is preserved. The dolines or mogotes which surround the site are outcrops of the AymamdnFormation. Based on the cores collected at two well locations (MW-3 and MW-5), the on-site sinkholesdeveloped in both the Aymamon and the underlying Aguada formations. Figures 3-6 and 3-7 show thatthe Aymamon Formation, which subcrops over almost all of the site, is overlain by soils withintopographic depressions, and is exposed on the crests of the steep-sided magotes. The AymamonLimestone is not preserved in MW-3, probably due to solution collapse of these limestones within thesinkhole.

Typically, the limestones are massive, pink, brown or white, fossiliferous, occasional sandy, and maycontain vugs or fractures with the degree of weathering noted to decrease gradually with depth. Caliperlogs through the lower Aymamon Formation are ragged, possibly indicating vugs and other sizeablesolution cavities (as seen in MW-4, Figure 3-6). Equally, the gamma ray responses through this unitare locally ragged which could indicate the occurrence of clay-rich beds or clay-filled solution cavities.The gamma logs for MW-1 and MW-2 suggest the Aymamdn Formation is clay-rich immediately abovethe contact with the underlying Aguada Formation.

3.4.2.3 Aguada Formation

The Aymamon Formation is underlain by the Aguada Formation, the upper contact of which appearslocally to be abrupt, planar, and subhorizontal, dipping 0-5° towards the north. The top of the underlyingAguada Formation is defined by a ragged gamma ray response and commonly a slight increase inborehole size recorded by the caliper tool. In cored intervals, the Aguada Limestone is characterizedby massive white or pink fossiliferous limestone and sandy limestone with extensive moldic secondaryporosity and common clay interbeds. The Aguada Formation is distinct from the Aymamon Formationby its greater lithologic heterogeneity and overall finer-grained texture.

The Aguada Formation is up to 350 feet thick (Monroe, 1980). Subsurface solution channels and vugsmay be partially in-filled with washed-out clastic materials or lined with secondary minerals.

The top of the Aguada Limestone is omitted in the MW-3 core due to cavern collapse within the centralsinkhole. Elsewhere, the contact between the two limestone units is not easy to recognize; in wellswhere this contact is not easily defined, and where it may be more gradational, this contact has beenchosen by conserving lithostratigraphic thickness above a well-defined and spatially widespread sandylimestone member within the Aguada Formation. The sandy limestone member is approximately 100feet below the inferred contact between the two limestone formations. It is approximately 30 feet thickand can be traced across the Site between logged and cored wells, and dips gently towards the north,parallel to bedding. In cored sections, the sandy limestone may contain up to 50% sand. This unit alsois relatively more clay-rich than the rest of the formation and exhibits a relatively higher gamma logresponse, reflecting the greater proportion of clays and other detrital minerals.

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3.5 HYDROGEOLOGY

3.5.1 REGIONAL HYDROGEOLOGY

The Aymamon and Aguada formations form one of the primary sources of potable water within theNLP. The two formations are in direct hydraulic contact with each other and constitute the upperunconfined aquifer system of the NLP (Rodriguez-Martinez, 1995). The thickness of the upper aquiferin the regional vicinity of the site ranges from about 925 feet near Manati, ±7.5 miles to the west of thesite, to about 650 feet in the Toa Baja area, ±8 miles to the east. The base of the upper aquifer isdefined by the upper members of the underlying Cibao Formation, immediately underlying the AguadaFormation, which contains beds of calcareous clay, marl, and chalky limestone of low permeability.The upper Cibao Formation acts as a confining unit to the deeper Cibao aquifer. Confining layers arenot known to exist within the upper aquifer in the immediate vicinity of the study area.

On a regional scale, groundwater in the upper aquifer flows northward towards the Atlantic Ocean. Theunconfined aquifer system is recharged by precipitation in the upland areas to the south, whichinfiltrates down to the water table via surface runoff, infiltration through soils and limestones, and bydirect runoff into sinkholes. Upper aquifer recharge may also occur via leakage from the underlyingconfined aquifers. Groundwater in the upper aquifer discharges to the low-lying areas of the coastalplain and Atlantic Ocean to the north, expressed at the surface and along the sea floor as spring and/orseeps. The overall net rate of recharge to the upper aquifer is about 15 inches per year. Given theheterogeneous nature of karst terrane, the rate of recharge to the aquifer is likely to be highly variableon a local scale. Published potentiometric surface contour maps of the Aymamon-Aguada aquifersystem (as shown in Figure 3-8) suggest a general regional groundwater flow direction towards thenorth, with localized flow directions verging to the northwest and northeast (Gomez-Gomez andTorres-"Sierra, 1988).

Hydraulic conductivity estimates of the upper aquifer range from about 500 feet per day (ft/d) to morethan 1,500 ft/d for the Aymamon Formation to about 90 ft/d for the underlying Aguada Formation(Giusti and Bennet, 1976; Torres-Gonzalez, 1985). Hydraulic conductivity is generally believed todecrease with depth, and the lower part the Aymamon Formation is believed to be less permeable thanthe middle and upper Aymamon Formation. Hydraulic gradients are steeper in the Aguada than in theAymamon, reflecting the lower transmissivity of the Aguada Formation (Torres-Gonzalez, 1985).Specific capacities of wells tapping the Aymamon range from 100 to 1,000 gallons per minute per footof drawdown (Torres-Gonzalez and Wolansky, 1984).

Groundwater flow in the NLP karst occurs both as "diffuse" and "conduit" or free flow. Secondaryporosity (i.e., solution channels) can significantly affect local groundwater flow patterns.Predominantly, groundwater flow in such karst aquifers is along bedding planes, fractures enlargedthrough solution, or large solution channels or "conduits" (Ford and Williams, 1989). When thepreferred flow path is along a conduit in which flow is non-laminar (i.e., non-darcian), this type ofgroundwater movement is considered "conduit" flow. As such, a karst aquifer can be veryheterogeneous; the direction of groundwater flow in free-flow aquifers is controlled by the orientationof the bedding planes and fractures that determine the location of solution conduits. Although all voidspaces in the limestone reservoir may be saturated, the vast majority of groundwater flow isaccomplished through turbulent conduit flow.

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The regional hydraulic gradient is approximately 0.045 in the outcrop areas of the less permeable lowerAymamon Formation and Aguada Formation to the south of the site (Giusti, 1978). From there, thehydraulic gradient attenuates to ±0.0007 within the Aymamon Formation along the coastal plain. Theregional water table is nearly flat, having only a small elevation above regional base level because ofthe rapid drainage through the vadose zone. The very low regional hydraulic gradient suggests thatdefused flow through solution planes and fractures is extremely slow.

3.5.2 LOCAL HYDROGEOLOGY

The interpretation of lithologic and hydrologic data collected during drilling of six on-site monitoringwells indicates the V&M Site is underlain by the Aymamon-Aguada unconfined aquifer system. Theunderlying Cibao Formation, which was not encountered during drilling, likely acts as a lower confiningunit. The core and geophysical logging of the wells did not identify potential shallow confining layerswithin the vadose zone that could create perched water table conditions. However, field studiesdocumented that the lower portion of the Aguada Limestone unit consists of a more sand-rich limestone,which may act as an aquitard, that would thereby limit the vertical movement of groundwater. Inaddition, the surficial Blanket Deposits consist of unconsolidated clayey-sands which likely retard theinfiltration of surface water runoff into the aquifer, especially in the central sinkhole where the blanketdeposits are over 50 feet thick.

The water table is encountered at elevations between approximately 105 feet amsl in the southeastportion of the site down to approximately 70 feet amsl on the northern portion of the site, according togroundwater elevation measurements taken during the Round 1 sampling event (Table 3-1). TheAymamon Limestone is above the water table across the Site; core log data indicate the base of they<|dose zone lies within the lower portion of the Aguada Formation at each monitoring well.

Recharge to the water table aquifer likely occurs by direct infiltration of precipitation on limestoneoutcrop areas and by surface runoff into sinkholes. However, the path that stormwater takes from thesurface to the water table is most likely complex. As shown in Figure 3-6 and Figure 3-7, theoverburden thickness and elevation of the soil/bedrock interface are highly irregular. The rate ofinfiltration across the site is probably variable and not easily quantifiable. The presence of sinkholesin the Aymam6n Limestone at the site indicates that conduit flow through solution channels may be animportant vadose zone and groundwater flow mechanism. Solution channels beneath the sinkholeswould facilitate rapid infiltration of surface runoff through the vadose zone to the water table, whichoccurs within the lower portion of the Aguada Formation. Since on-site sinkholes are at elevationsbelow the former burn areas, storm water runoff would have drained quickly to these topographic lows.

Secondary porosity (i.e., solution channels and vugs) in limestone bedrock can significantly affectgroundwater flow patterns. On a very localized scale, groundwater flow can be extremely complex, asgroundwater flow is controlled by solution conduits, bedding planes, and fractures. On a more regionalscale, groundwater flow is influenced by groundwater discharge and recharge features such as rivers.At the V&M site, groundwater flow may be very complex at each monitoring well location, but theoverall regional flow direction is influenced by the Rio Indio to the north of the site.

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3.5.2.1 Synoptic Water Level Measurements

Synoptic groundwater elevation measurements were collected on April 4, 1998 (Round 1), May 18,1998 (Round 2), and November 9,1998 (Round 4), prior to sampling the wells for contaminants. Waterlevel measurement collection in April occurred during the dry season; the synoptic measurementscollected in May represent water levels between dry and wet season; and those collected in Novemberwere collected during the wet season. Table 3-1 presents the synoptic water level measurementsummary for Rounds 1, 2, and 4. The data show that the water table level fluctuation at each welllocation are not equal in magnitude from dry to wet seasons. For example, the greatest increase in waterlevel was recorded in MW-3, by 9.25 ft.; the smallest change in water level occurred in MW-4, wheregroundwater rose only by 1.02 ft. over the monitoring period. During the wet season, on average, watertable levels rose by 5.17 ft.

The heterogeneity of the hydraulic head increase across the site between dry and wet seasons is anindication that the aquifer in certain areas of the site have a more immediate, but less predictableresponse to recharge events. The degree of response of hydraulic head in a given well is dependentupon the size of fractures or conduits encountered by the well and the directness of their connection tosurface inputs (ASTM, 1995).

Figure 3-9 is a hydrograph illustrating the recorded changes in water level elevations for each well. Thegreater rise in water levels in MW-3 compared with the other wells likely is due to its location withinthe central depression, adjacent to the largest sinkhole. This location receives a large proportion of thesite's surficial-stormwater runoff. Water table mounding and a denser network of solution conduitsbeneath the sinkhole is a probable explanation for the larger wet season infiltration response in MW-3compared with the other wells.

Information pertaining to supply and industrial/agricultural well pumping was not assessed due to thelimited period of monitoring.

3.5.2.2 Groundwater Potentiometric Surface

To determine groundwater flow direction at the site, groundwater elevation measurements from the sixmonitoring wells at the V&M Site were used to plot the potentiometric surface contours for the watertable aquifer. Figure 3-10 illustrates the potentiometric surface elevations measured from monitoringwells at the V&M Site on April 4, 1998. A flow direction to the north-northwest is indicated, whichis slightly divergent from the region's general groundwater flow direction towards the north (Gomez-Gomez and Torres-Sierra, 1988). This suggests that local groundwater flow may be influenced by theproximity of the Rio rndio, located 0.4 mile northwest of the site.

3.5.2.3 Continuous Water Level Measurements

To evaluate the nature of recharge to the water table aquifer, CDM Federal continuously monitoredwater levels in four of the six RI monitoring wells. Continuous monitoring occurred during the dryseason from March 10 to March 29, 1998. Each monitoring well was monitored for 20 days with anrn-Situ Inc. Troll 4000 Logger/Probe. Unfortunately, one of the four data loggers malfunctioned so thatthe downloaded data were unusable.

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Hydrographs in Figure 3-11 show continuous water level fluctuations measured in MW-1, MW-4, andMW-6 over the 20 day monitoring period. Two rain events occurred in the site's vicinity betweenMarch 13 and March 19, during which time approximately 1.75 inches of rain fell. The hydrographsfor MW-4 and MW-6 do not indicate significant changes in water level over the monitoring period..However, a gradual increase in water level was observed in MW-1 during and immediately after the rainevents. MW-1 is located northwest (downgradient) of a small sinkhole and the large central sinkholedepression at the site; whereas MW-4 and -6 are not located near sinkholes (Figure 2-1).

More rapid infiltration of rainwater through the vadose zone at MW-1 (possibly by conduit flow withinnearby sinkholes) may explain the water level rise in response to rainfall at MW-1 compared with littleresponse observed at the other two wells. At these wells, much slower vadose zone infiltration throughoverburden soils likely would retard and reduce the response of water levels after the rain events.

There were no observed correlations between barometric pressure and water levels in any of the wellsmonitored, apart from the inferred indirect relationship between low barometric pressure systems,rainfall, and the changes in water levels seen in MW-1.

Noticeably, the water level curves of each hydrograph had a cyclic (almost sinusoidal) character withan amplitude of between approximately 0.5-1.0 inch over a frequency of approximately 12 hours. Uponcloser examination of the data, the phases of the crests and troughs were almost identical over a 24-hourperiod; the lowest water levels occurring during the mid to late morning and mid to late evening, andthe crests occurring during the early morning and early evening.

CDM suspected that the daily fluctuations in water level might be influenced by supply wells in thesite's vicinity. With the aid of English-Spanish translation provided by EPA personnel, CDM Federalasked the Puerto Rico Aqueduct and Sewer Authority (PRASA), the owner of the two nearest municipalsupply wells (Almirante Norte No. 2 and Almirante Norte No.3 - shown on Figure 2-4), whether theycycled the extraction of water throughout the day. It was thought that the pumping rate cyclicity mightbe in response to fluctuations in the local community's daily demand for water. PRASA stated that thewells were in service 24-hours a day; no further information could be gathered to determine if thepumping rates varied. Without variable pumping rates for other supply wells in the site's vicinity, itis uncertain what external force could be linked to the diurnal cyclicity observed in the wells'hydrographs.

3.5.2.4 Hydraulic Gradients

The potentiometric map for April 4,1998 (Figure 3-10) was used to estimate hydraulic gradients acrossthe site. Hydraulic gradients across the V&M Site appear to vary as a function of the localizedtopography. The hydraulic gradients were estimated by dividing the change in groundwater head by thelinear distance along a flow line perpendicular to groundwater elevation contours. The averagehydraulic gradient within the Aguada Formation in the southern portions of the site was ±0.0111 whichattenuated to ±0.0070 on the northern portion of the site. The regional groundwater gradient to thenorth of the study area diminishes to ±0.0007, which is within the Aymamon Formation (from Giusti,1978).

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Vertical hydraulic gradients were not calculated using site-specific V&M Site well information.However, a qualitative assessment was made to determine upward hydraulic gradient indicating zonesof aquifer discharge (i.e., upward flow) and downward vertical hydraulic gradients indicating zones ofaquifer recharge. The sinkholes are considered water table aquifer recharge areas (downward gradient)while spring/seeps along the Rio Indio river are considered water table aquifer discharge areas (upwardgradient). This qualitative assessment was made by comparing water level elevations at the V&M Sitewith water level elevations along the Rio Indio perpendicular to groundwater flow.

3.5.2.5 Groundwater Flow Velocity

Groundwater velocities were not calculated for the water table aquifer. Groundwater velocity could bedetermined by: 1) reviewing published information; 2) conducting slug tests; 3) aquifer tests (pumptests), and; 4) tracer tests. With the exception of a tracer test, all methods have inherent limitations.Groundwater velocity obtained from published information would provide general information only andmay not be applicable to actual site conditions. Slug and aquifer tests are quantitative measurements;however, they only provide aquifer information near the wells tested. A tracer test was determined tobe cost prohibited for the amount of information that would be provided.

Published groundwater velocities for the Aymamon and Aguada formations in the study area's vicinityare 0.1 centimeters per second (cm/s) and 0.005 cm/s, respectively (Giusti, 1978). The lower rate ofgroundwater flow in the Aguada Formation likely is a function of the formation's higher insoluble fine-grained clastic content which would retard the development of a solution conduit system.

3.5.2.6 Spring/Seep Survey

An extensive spring/seep survey was performed through field reconnaissance, consultation with theUnited States Geological Survey (USGS) in San Juan, and discussions with local landowners. InDecember 1997, CDM Federal personnel and a representative of the USGS surveyed the Rio Indiovalley downgradient of the study area, from the intersection of the river and State Rt. 646 south toAlmirante Norte, a distance of approximately 3/4 mile. The field team focused on the drainage cutscoming down off a ridge on the southeastern valley side. Two spring locations were pointed out by theUSGS and one by the property owner of the land along the south side of the Rio Indio. Two of the threesprings were flowing in December 1997 and were sampled. No other surface flow originating from theridge was observed along this downgradient stretch of the Rio Indio. Figure 2-4 is a map showing thelocations of the two flowing springs identified in December 1997 in relation to the Rio Indio and theV&M Site.

At the time of the late March groundwater elevation measurements, both springs had ceased flowing,indicating a lower hydraulic gradient/groundwater recharge rate in the area. By mid-May, during thesecond well monitoring event, one of the springs, Spring #1, had begun to flow again and it wassampled. The observation of springs/seeps along the Rio Indio suggests that groundwater iscontributing to the river's baseflow. It is possible that contaminants derived from the V&M Site couldmigrate to surface waters via this migration pathway.

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3.6 VADOSE ZONE MODELING

There are two possible transport mechanisms by which contaminants in V&M site soils could migrateto groundwater: by leaching through soil pore space and unsaturated limestone or by direct transportthrough fractures. Adsorption/desorption processes are the dominant means of contaminant attenuationin the first method, whereas geochemical equilibrium and dilution are the dominant factors in thesecond. Either one of these migration mechanisms, or a combination of both, may operate at the site(COM Federal, 1997c).

The vadose zone modeling exercise indicated that there was a very low potential for site contaminantsto significantly impact groundwater under a soil leaching scenario. The relatively high distributioncoefficients (Kds) of the site metals and the clayey composition of the site soils result in high rates ofmetals adsorption, rapid attenuation of contaminant concentration with depth, and very slow transportto the water table. The observed distribution of contaminants identified in site soils prior to the removalaction supports this scenario. Before the removal action, high concentrations of metals in surface soilsdecreased to near-background levels within a foot or two of the surface. Under the soil leachingscenario, maximum metals concentrations in the groundwater would not occur for hundreds of years,assuming an ongoing soil source existed. Given that the worst potential soil sources of groundwatercontamination have been removed, the risks to groundwater appear to be minimal if soil leaching is thepredominant migration mechanism at the site.

The karstic nature of the terrain suggests that direct transport of contaminants through fractures alsomay have been a significant transport mechanism at the V&M site. When this scenario was evaluated,the results indicated that site contaminants could cause drinking water to exceed drinking waterstandards within a relatively short time (days) if they were flushed through fractures by rainwater.However, the resulting concentrations predicted under this scenario were probably unrealistically highdue to the very conservative assumptions for the solubility state of the metals, the quantity of sourcematerial present, the time needed to develop an equilibrium leachate, and the amount of dilution thatwould occur (COM Federal, 1997c).

3.7 DEMOGRAPHY AND LAND USE

The V&M Site is located in north-central Puerto Rico off State Road Rt. 160, Kilometer 4.2 in theAlmirante Norte Ward of the municipality of Vega Baja, Puerto Rico. The population of Vega Bajanumbers 55,997 persons, with approximately 35,000 persons (62%) between the ages of 18 and 65(1990 Census). The V&M Site is uninhabited. The site's vicinity is sparsely populated with fewer than100 residents estimated to live within one-quarter mile.

The V&M Site and the surrounding area are rural and characterized by rugged, heavily-vegetated hillyterrain with small farms located in valleys. In recent decades, the base of economic activity in the areahas shifted from agriculture to the electronics and pharmaceutical s industries.

Historically, dirt roads accessed the site; however, they were improved during the soil removal action.These roads were blocked with removable concrete barriers following completion of the soil removalaction. The barriers were moved to allow access during each of the four sampling events.

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The Vega Baja Solid Waste Disposal Superfund site, located in the Rio Abajo Ward, is approximately5 miles north of the V&M Site, topographically and hydraulically downgradient. The Municipality ofVega Baja used the 19-acre site as an unlined landfill that received commercial, industrial, and domesticwaste until 1979.

3.8 BIOTA AND ENVIRONMENTAL RESOURCES

Ecological conditions at the V&M site were observed during a site visit in May, 1998. The site islocated in the limestone uplands of north-central Puerto Rico in the municipality of Vega Baja. The siteand surrounding area consist of karst topography which causes three types of vegetative communities,including moist and humid valleys and sinkholes, humid and moist areas along the gentle to extremeslopes, and xeric conditions along the peaks and ridges. Each vegetative community within the siteboundary contained slight variations in species concentration and composition. The concentration andcomposition of the plant species was also influenced by the proximity to the previously disturbed areas.Additional flora and fauna information was ascertained from communications with representatives fromthe various federal and commonwealth agencies noted below.

The site is comprised of five areas where wastes were burned. These areas were located within the karsttopography and were surrounded by heavily vegetated areas, sinkholes, and xeric peaks and ridges. Atthe time of the site visit, a soil removal action had recently been completed at the five burn areas at thesite. Each of these disturbed areas was relatively void of vegetation, but pioneering vegetation wasencroaching into the void areas from the adjacent subtropical moist forest.

The vegetation within the disturbed areas where the soil removal action occurred consisted of a varietyoj^grasses, shrubs and vines, and saplings from the surrounding forest. The grasses included Sorghumspp., Eleusine indica, and other unidentified species. The immature shrubs and vines, and the saplingspresent in the disturbed areas could not be positively identified. The common pioneering treessurrounding the disturbed areas consisted of African tulip tree (Spathodea campanulata), lead tree(Leucaena glauca), sweet acacia (Acacia farnesiana), and various fruit- bearing trees that were mostlikely planted, including grapefruit (Citrisparodist), banana trees (Musa spp.), and mangos (Mangiferaindica). The trees along the hillsides and on the ridges and peaks include the autograph tree (Clusiarosea), saber tree (Zanthoxylum martinicense), balsa wood (Ochromapyramidale), and oxhorn buceras(Bucida buceras).

During the site visit, numerous birds, anoles, and amphibians were observed to be utilizing the site andadjacent areas. The birds listed in Table 3-2, were heard or observed within the site boundary. Owingto the limited amount of time available to collect the flora and fauna information, it is unknown if thebirds are residents of the area or migrants. Various anoles (Anolis spp.), toads (Bufo spp.), and a varietyof unidentified tree frogs were sighted or heard during the site walkover. Bats were not sighted duringthe site walkover; however, vegetation upon which bats feed was present on site, including Andirainermis and Piper aduncum. Other wildlife species observed at the site includes various scorpions,insects, and spiders.

Inquiries were made to the U.S. Fish and Wildlife Service (USFWS) and Puerto Rico's Department ofNatural and Environmental Resources regarding the presence of threatened and endangered species andecologically sensitive environments that may exist on and in the vicinity of the site.

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Puerto Rico's Department of Natural and Environmental Resources Natural Heritage DivisionBiological Conservation Data Bank reported that four plant and three animal species of concern werelocated near the site; the plant species and two species of bats are listed as Critical Elements for theNatural Heritage Division. The plant species and bats were identified approximately 1.6 milessouthwest and 4.5 miles west of the site, respectively. The third animal species, the Puerto Rican boa(Epictates inornatus), is a Federally-listed endangered species. The Puerto Rican boa was documentedapproximately 2 miles east of the site. The Data Bank did not contain records that any of these speciesare located on the site. The Department also reported the presence of the Laguna Tortuguero NaturalReserve and Special Planning Area and the Vega Forest located approximately 4.5 and 2.0 miles fromthe site, respectively.

Correspondence with the USFWS reported that the limestone hills region harbors a number ofFederally-listed endangered plants and the Federally-listed endangered Puerto Rican boa. The letterreceived from the USFWS did not list the individual endangered plant species or identify their locations.The USFWS performed a site walk-over on March 26, 1997.

CDM Federal performed a post-soil removal site walkover in May 1998. The purpose of the sitewalkover was to document the site conditions within the soil removal areas. CDM Federal personneldid not identify any of the plants or animals listed as Critical Elements for the Natural Heritage Divisionor any threatened or endangered species within the soil removal areas.

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4.0 NATURE AND EXTENT OF CONTAMINATION

This section discusses the type and distribution of organic and inorganic contamination at the V&MSite. Section 4.1 describes the determination of the federal and Commonwealth environmental andpublic health requirements that are applicable or relevant and appropriate requirements (ARARs)Sections 4.2 and 4.3 present the nature and extent of on-site and off-site groundwater contamination.

To meet the objectives of the RI as defined in the Final Work Plan (CDM Federal, 1997a), CDMFederal focused the site characterization on those constituents that were identified as chemicals whichexceeded site-specific screening criteria in burn areas that underwent soil removal actions. Screeningcriteria were developed to identify chemicals that exceeded: a) regulatory standards or guidelines, orb) naturally occurring background levels. Minimum analytical detection limits were set below thescreening criteria. QA/QC Measures and Data Quality Objectives for the field sampling activities arepresented in Appendix F.

4.1 SELECTION OF SCREENING CRITERIA (ARARS)

This section provides a determination of the federal and Commonwealth environmental and publichealth requirements that are ARARs for the V&M Site. Established regulatory criteria, known aschemical-specific ARARs, were used to screen the groundwater analytical data.

Groundwater

The Puerto Rico Environmental Quality Board (EQB) has identified the North Coast Limestone aquifersystem underlying the V&M Site as a Class SG1 resource, defined as groundwaters intended for useas a drinking water supply and for agricultural uses including irrigation. The aquifer is the principaldrinking water supply in the area. Therefore, drinking water and groundwater standards are applicablefor the Site and both Federal and Puerto Rico water quality standards are available.

Federal

• Safe Drinking Water Act (SDWA), Maximum Contaminant Levels (MCLs): 40 CFR141.11-.16 -issued July 1, 1991 and amended in the Federal Register 40 CFR Part 141issued June 29, 1995. These levels include secondary MCLs (SMCLs), which are notenforceable but set standards for taste, odor, color, appearance, and other aestheticfactors that may affect public acceptance of water.

• National Recommended Water Quality Criteria-Correction (Revised April, 1999). EPA822-Z-99-001

Commonwealth

• Puerto Rico Water Quality Standards - Puerto Rico Environmental Quality Board, WaterQuality Standards Regulation (November 30, 1987).

Groundwater analytical results were screened against the National Primary Drinking Water Standards.The SDWA requires the EPA to assess and regulate all contaminants in the drinking water supply that

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could have an adverse effect on public health. The National Drinking Water Standards identify MCLswhich are the ARARs and were compared with the observed groundwater quality (see Table 4-1).National secondary drinking water regulations (or secondary standards), also listed on Table 4-1, arenon-enforceable guidelines regulating contaminants that may cause cosmetic effects (such as skin ortooth discoloration) or aesthetic effects (such as taste, odor, or color) in drinking water. EPArecommends secondary standards to water systems but does not require systems to comply.

Surface Spring/Seep results were screened against National Recommended Water Quality Criteria-Correction (April, 1999) to assess potential impact to aquatic organisms and their uses. Table 4-2presents these screening criteria, some of which are sample-specific and require calculations to derivea screening level value for each sample. Calculations deriving the sample-specific screening values forparticular analytes are presented in Appendix G.

The Puerto Rico drinking water standards are limited to a small number of analytes. The Puerto Ricostandard for arsenic [0.022 micrograms per liter (ug/1)] is not measurable using current standardlaboratory methods. The practical quantification limits for arsenic are between 1.0 and 40.0 ug/1 by thebest standard methods available (Standard Method for the Examination of Water and Waste Water, 19thEdition). Since the concentration of arsenic in groundwater samples could not be measured to the levelof the Puerto Rico drinking water standard, the Federal MCL was used, with concurrence from thePuerto Rico EQB. The Federal standard was developed to be protective of human health and theenvironment.

Table 4-1 shows that the Puerto Rico Water Quality Standards are generally less extensive than theFederal Primary Drinking Water Standards, but are as stringent as the federal standards where astandard exists, with the exception of the Puerto Rico Water Quality Standard for arsenic (as discussedabove).

4.2 NATURE AND EXTENT OF ON-SITE GROUNDWATER CONTAMINATION

On-site groundwater sample analytical results were compared with the relevant Federal and Puerto Ricodrinking water standards, which are the ARARS. Groundwater contaminant data were derived fromfour groundwater sampling events, from the six on-site RI monitoring wells; samples were collectedduring the weeks of March 29, 1998 (Round 1), May 18, 1998 (Round 2), September 7, 1998 (Round3), and November 9, 1998 (Round 4). Refer to Section 2.8.1.2 (Monitoring Well Sampling) for adescription of sampling methods used for each sampling round.

Groundwater samples were analyzed for full TAL (plus cyanide except for Round 4). In addition, fullTCL, including low-detection level VOCs, were analyzed for in Rounds 1 and 2;. TCL semi-volatileorganic compounds (SVOCs) were analyzed for Rounds 1 and 2, only; TCL pesticides/PCBs wereanalyzed in Round 1, only. A duplicate sample was collected from MW-2 in Round 1, from MW-3 inRound 2, and from MW-6 in Rounds 3 and 4. The duplicate sample was designated as MW-7.Complete organic and inorganic analytical results, including additional water quality parameter resultsfor the Pre-Round, Round 1 and Round 2 events, are presented in Appendix H.

Inorganic analytes that commonly occur in groundwater within limestone aquifers, such as calcium,magnesium, potassium, and sodium do not possess either Puerto Rico Water Quality Standards or

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Federal Primary or Secondary drinking water standards (see Table 4-1), and are not discussed in the RI.However, the concentrations of these commonly-occurring analytes are presented in the full sample datatables in Appendix H. Table 4-3, Table 4-4, Table 4-5, and Table 4-6 present the volatile organiccompounds and inorganic analytes that were detected in sample rounds 1 through 4, respectively.

4.2.1 ROUND 1

Organic Compounds

Volatile Organic Compounds - Tetrachloroethene (PCE) was identified in well MW-6 at a concentration1.2 times its screening criterion. Due to its minimal exceedance of the screening criterion and as MW-6is an on-site background well, tetrachloroethene was not considered as a site-derived contaminant. Noother VOCs exceeded their screening criteria.

Methylene chloride and 2-butanone were detected in wells MW-2 and MW-6, respectively, and arebelieved to be laboratory artifacts.

Semi-Volatile Organic Compounds - Table 4-3 illustrates SVOC detections in groundwater sampleRound 1. No SVOCs exceeded screening criteria; of note, bis(2-ethylhexyl)phthalate was detected inMW-1, MW-2, and MW-3 at concentrations well below its screening criterion.

Pesticide/PCBs - There were no detections of pesticides or PCBs in groundwater samples collected fromRound 1.

Inorganic Anaivtes

Table 4-3 presents the inorganic analytes that were detected in Round 1 after re-validation of the data(Section 2.8.1.3). Lead was detected in the sample from MW-1, MW-3, and MW-4 at concentrationswhich exceeded its criterion by 3.8, 1.5, and just over 1.0 times, respectively. Nickel was detected insix samples, one of which exceeded its screening criterion by 21.4 times. There were no otherexceedances in Round 1. Other analytes, although commonly detected, did not exceed their screeningcriteria.

Aluminum and iron found in MW-4, and manganese detected in MW-1 and MW-4 were noted atconcentrations above their SMCLs. It should also be noted that the turbidity measurement ofgroundwater purged from MW-4 immediately prior to sampling was elevated, at 311 NTUs. Theturbidity may have contributed to the inorganic detections in this well.

4.2.2 ROUND 2

Organic Compounds

Volatile Organic Compounds - No VOCs were detected in the groundwater samples at the site (seeTable 4-4).

Semi-Volatile Organic Compounds - There were no detections of SVOCs in Round 2.

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Pesticide/PCBs - Neither pesticides nor PCBs were identified during Round 1. With approval fromEPA, it was determined that groundwater samples did not need to be analyzed for these compounds.

Inorganic Analvtes

None of the detected analytes exceeded their screening criteria, except for cadmium. Cadmium wasdetected in five samples. The MW-3 sample exceeded the analyte's screening criterion by 2.6 timesCadmium, however, was not detected in the MW-3 duplicate sample. Several other analytes weredetected in the Round 2 sampling event; however, none of these detections exceeded their screeningcriteria (see Table 4-4).

During data validation, all of the Round 2 lead results were rejected due to exceedances of thelaboratory matrix spike recovery parameters. In addition, three field blank samples had several analytesabove the CRDL which resulted in the rejection of the values for copper and zinc in MW-3, MW-5, andthe duplicate sample of MW-3 (MW-7).

Arsenic was not detected in Round 2 analytical results exceeding the Federal drinking water standardof 50 ug/1. Of note, the Puerto Rico drinking water standard for arsenic is 0.022 ug/1, a concentrationwhich is below the CLP laboratory sample detection limit for arsenic and, therefore, the detections inMW-1 and MW-2 exceed the Puerto Rico standard.

None of the inorganic analytes, except for one detection of cadmium, in Round 2 were above the EPAPrimary Maximum Contaminant Levels, Manganese was detected in MW-2 and MW-3 atconcentrations above its SMCL.

4.2.3 ROUND 3

Organic Compounds

Volatile Organic Compounds - The analytical results for Round 3 (Table 4-5) did not identify adetection of VOCs in the sample collected from MW-6, except for a detection of acetone in theduplicate sample; this compound is believed to be a laboratory artifact.

A groundwater sample only from MW-6, one of the on-site background wells, was analyzed for VOCsin Round 3 because of the slight exceedance of PCE in Round 1. With approval from EPA, it wasdetermined that no further testing of groundwater for low concentration VOCs was necessary in theother on-site wells, MW-1, MW-2, MW-3, MW-4, and MW-5, during sampling Round 3.

Semi-Volatile Organic Compounds - As SVOCs were not detected at concentrations above theirscreening criteria in either Rounds 1 or 2, with the approval from the EPA RPM, it was determined thatno further testing of groundwater for SVOCs was necessary in on-site wells during sampling Round 3.

Pesticide/PCBs - With approval from EPA, it was determined that groundwater samples did not needto be analyzed for Pesticides or PCBs.

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Inorganic Analytes

Antimony was detected once, from the background well MW-6, at a concentration 6.7 times above itsscreening criterion. Antimony was not detected in the duplicate sample from MW-6. Chromium wasdetected once from the sample collected from MW-3; the sample exceeded the chromium screeningcriterion by 1.2 times. Since antimony and chromium were detected sporadically, they were notevaluated as Contaminants of Potential Concern (COPCs) (Table 4-5).

Arsenic in Round 3 did not exceed the Federal drinking water standard of 50 ug/1. The Puerto Ricodrinking water standard for arsenic is 0.022 ug/1, a concentration which is belo\| the CLP laboratorysample detection limit for arsenic. The detections for MW-2, MW-5 and in the duplicate sampleexceeded the Puerto Rico standard.

4.2.4 ROUND 4

Organic Compounds

Volatile Organic Compounds -With approval from EPA, it was determined that groundwater samplesdid not need to be analyzed for VOCs.

Semi-Volatile Organic Compounds - With approval from EPA, it was determined that groundwatersamples did npt need to be analyzed for SVOCs.

Pesticide/PCBs - With approval from EPA, it was determined that groundwater samples did not needto be analyzed for Pesticides or PCBs.

Inorganic Analvtes

Although several analytes were detected in Round 4 groundwater sampling, none of the results wereabove the EPA screening levels (Table 4-6).

Arsenic in Round 4 did not exceed the Federal drinking water standard of 50 ug/1. The Puerto Ricodrinking water standard for arsenic is 0.022 ug/1, a concentration which is below the CLP laboratorysample detection limit for arsenic. The detections for MW-1, MW-2, MW-4, and MW-6 exceeded thePuerto Rico standard.

Aluminum was detected in all wells at concentrations above its SMCL; iron was detected in all butMW-5 at concentrations above its SMCL; and manganese was detected in MW-2 at a concentrationabove its SMCL.

4.2.5 SUMMARY OF ON-SITE CONTAMINATION

Based on the review of the four rounds of groundwater analytical results, the frequency of contaminantMCL exceedance at the V&M Site is sporadic. There were no sampling locations which exhibitedconsistently elevated detections of any organic compound or inorganic analyte.

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Organic compounds were sporadically detected; the only exceedance of screening criteria occurredduring Round 1 with the detection of PCE in MW-6 at a concentration 1.2 times its screening criterion.PCE was not detected in MW-6 in Round 2 or Round 3. No other organic compounds exceeded theirscreening criteria in Rounds 1,2, or 3. MW-6 served as an on-site background well which is not likelyto have been impacted by volatile organic compounds migrating from the known areas of soil impactat the site. The PCE may have been derived from the improper disposal of solvents at an unknownupgradient location.

Inorganic data indicate that site-related metals contamination, of lead in particular, has decreased inmagnitude since the initial on-site well sampling round. The elevated levels of lead and nickel observedin Round 1 sampling were not observed in Round 3 or Round 4. It is possible thai the elevated metalsconcentrations have either migrated further downgradient or have naturally attenuated in situ.

Water quality parameters for Round 1 and Round 2, which are listed in Appendix E, indicate that therewere high turbidity readings (above 100 NTU) during purging of MW-4 immediately prior to collectionof a groundwater sample. A high concentration of suspended solids containing inorganic analytes mayhave resulted in the exceedences of analytes such a as lead observed in MW-4 in the first two samplingrounds.

The on-site background well results (MW-5 and MW-6) do not exhibit significantly lower analytedetections compared with those of the remaining on-site wells. This could suggest that the analytesdetected on site are derived from an off site, upgradient source, or that they are naturally occurring. Theexceedances of PCE in Round 1 and antimony in Round 3 were associated with MW-6, and, therefore,were unlikely to have been attributable to any former on-site soil contamination.

4.3 NATURE AND EXTENT OF OFF-SITE CONTAMINATION OF GROUNDWATER INPRIVATE AND MUNICIPAL SUPPLY WELLS

Water quality in major private and municipal supply wells within a 1.5-mile radius of the site wasassessed. Six off-site supply, agricultural/industrial and residential wells were sampled during the weekof December 1, 1997. Observed groundwater quality was compared with the relevant drinking waterstandards (Federal and Commonwealth) which are the RI ARARs. However, it should be noted thatthe detection limit for VOCs was 10 ug/1, above the MCLs for most VOCs. Well WDD is locatedupgradient of the site and was designated as the off-site background well. Refer to Figure 2-4 for thelocations of the off-site wells.

Groundwater samples were analyzed for full TCL/TAL plus cyanide, including low-concentrationVOCs. A duplicate sample was collected from municipal supply well WAN-3 and designated as WAN-4. The testing results are summarized in Table 4-7.

Organic Compounds

Volatile Organic Compounds - The results of the off-site well sampling event did not detect VOCs.

Semi-Volatile Organic Compounds - There were no S VOC exceedances of screening criteria. Bis(2-ethylhexyl)phthalate was detected in samples WAN-2, WAN-3, WAN-4, and WARRZ at low

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concentrations and are believed to be laboratory artifacts. There were no other detections of SVOCs.

Pesticide/PCBS - There were no detections of pesticides or PCBs in groundwater samples above theirscreening criteria. Heptachlor epoxide and endrin ketone (detected in WAIF), and dieldrin (detectedin WAN-3, WAN-4, WAIF, and WARRZ), were noted at concentrations below their respectivescreening criteria.

Inorganic Analvtes

Inorganic analytes were not found in municipal or private wells at concentrations that exceeded theirscreening criteria or their SMCLs. Aluminum, barium, lead, manganese, and zinc were detectedsporadically.

4.3.1 SUMMARY OF OFF-SITE PRIVATE/MUNICIPAL WELL CONTAMINATION

Water quality in all private and municipal wells within a 1.5-mile radius of the site was assessed. Oneupgradient background residential supply well and five potentially downgradient agricultural/municipalsupply wells were sampled during the week of December 1, 1997. The results of groundwater flowmapping, completed after the December 1977 sampling, indicate that the five potentially downgradientwells are actually more side gradient to the V&M groundwater flow (Figures 2-4 and 3-8). The resultsof the well sampling event do not identify exceedances of inorganic MCLs for any sample. A laboratorydetection limit of 10 ng/1 was used for analyses of VOCs; this detection limit is above the MCL forsome compounds. Nonetheless, levels of VOCs were not detected above 10 ug/1 and are not knownhistorically to be a concern at the V&M site. The side gradient well samples did not contain noticeablygreater concentrations of COPCs compared with the upgradient background well. Low concentrationsof a SVOC commonly associated with laboratory sample preparation and detections of three pesticideswere noted in four of the wells. Several inorganic analytes were detected at concentrations well belowtheir respective MCLs. With the exception of zinc, the analyte concentrations from the background wellare not lower than the side gradient wells.

The sampling results from the upgradient residential well were compared with those of the on-sitebackground wells (MW-5 and MW-6). There were no organic compounds detected in WDD; however,2-butanone and PCE were detected in MW-6 (Round 1), the PCE was detected above its screeningcriteria and likely was derived from an unknown upgradient source location.

The only inorganic analytes detected in WDD were barium, copper, vanadium, and zinc. Severaladditional analytes were detected in the on-site wells during the sampling rounds, including a singledetection of antimony above its screening criterion found in MW-6 during Round 3 sampling. No otheranalytes above screening levels were detected in the on-site background wells.

The difference in chemical detections between the upgradient residential well, with its much lowerincidence of chemical detections, compared with the chemical detections in the on-site backgroundwells suggests that a source for the chemicals not seen in WDD may be between it and the site.

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4.4 NATURE AND EXTENT OF OFF-SITE CONTAMINATION OF SPRING/SEEPS

Spring/Seep sampling results were compared with the relevant National Recommended Water QualityCriteria-Correction (EPA, 1999) which are the RI ARARs (Table 4-2). Sample values were comparedwith both the Surface Water Quality Criteria: Maximum Concentration (CMC) and the Surface WaterQuality Criteria: Continuous Concentration (CCC). The results of the sampling of two spring/seeps(Spring-1 and Spring-2) in December, 1997 and from a spring/seep (Spring-1), which was one of thetwo previously sampled spring/seeps, during Round 2 sampling in May, 1998. Results are summarizedon Table 4-8.

Organic Compounds

Volatile Organic Compounds - The results of the two off-site spring/seep sampling events did not detectVOCs.

Semi-Volatile Organic Compounds -The results of the two off-site spring/seep sampling events did notdetect SVOCs.

Pesticide/PCBS - The results of the two off-site spring/seep sampling events did not detect pesticidesor PCBs.

Inorganic Analvtes

Aluminum was detected 3.1 times above the CCC in both samples collected from Spring-1; neithersample exceeded the CMC.

Barium, iron, copper, lead, manganese, and zinc were detected. However, none of these analytes weredetected above their respective screening criteria, where criteria have been established. Criteria forcopper and zinc are expressed in terms of the dissolved metal in the water column and are expressedas a function of hardness (mg/1) in the water column. Criteria values for sample hardness werecalculated using parameters specified in Appendix B of EPA (1999). Computations for these sample-specific criteria are presented in Appendix G.

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5.0 CONTAMINANT FATE AND TRANSPORT

This chapter describes the persistence and the mobility of the TAL analytes identified above screeninglevels in the environmental samples. An understanding of the fate and transport of contaminants isnecessary to realistically evaluate future potential exposure risks and to evaluate remedial technologiesfor a Feasibility Study.

This section provides the following:

• a listing of the contaminants of potential concern for the Site;• a summary of potential contaminant transport pathways;• the relevant physical-chemical properties of the contaminants; and• a summary of the fate and transport characteristics of contaminants.

5.1 CONTAMINANTS OF POTENTIAL CONCERN

Fate and transport properties are important for contaminants that exceed ARARs, and contaminantsidentified as COPCs for the human health or ecological risk assessment. COPCs for the riskassessments are determined based on their toxicity characteristics, frequency, and the maximumconcentration at which they were detected in the site's groundwater.

The COPCs identified for the groundwater at the site are aluminum, antimony, arsenic, cadmium,copper, lead,*and silver. These COPCs likely were physically introduced to the site by illegal disposaland burning of electrical cables and other electrical components. November 1994 sampling of stainedsoil showed highly elevated concentrations of antimony, arsenic, cadmium, copper, lead, and silver(CDM Federal, 1997a).

Based on environmental concentrations and potential human health and ecological risks, heavy metalshave been recognized as the site COPCs and are discussed below.

The on-site groundwater monitoring well samples contained various concentrations of the followinganalytes: aluminum (up to 14,600 ug/1), antimony (up to 40 ug/1), cadmium (13 ug/1), and lead (up to57 ug/1). In addition to these analyte exceedances, chromium and nickel were detected sporadicallyabove screening criteria.

5.2 CONTAMINANT TRANSPORT PATHWAYS

5.2.1 PROPERTIES OF SITE MEDIA INFLUENCING CONTAMINANT TRANSPORT

The physical characteristics of the site are described in Chapter 3. The physical characteristics thataffect the transport of contaminants are briefly described below.

5.2.1.1 Topography

The topography of the site is characterized by large-scale karst weathering and dissolution features,including, closed drainage depressions, sinkholes (dolines) and rugged limestone hills (mogotes). The

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predominant site feature is a large elongated, approximately north-south trending, depression whichcontains two sinkholes. This depression receives drainage from the majority of the site. Severalsmaller, circular sinkholes are present in the north and western parts of the site. Burn areas are eitherupgradient or within on-site depressions containing sinkholes. Thus, surface water runoff potentiallytransported contaminants into the sinkholes where conduit flow to the underlying aquifer likelyoccurred.

5.2.1.2 Surficial Geology

The composition of the surficial geologic units exert a major control on the mobility of contaminantsin the unsaturated zone. The site is underlain by the Rock Outcrop-Blanket Deposi| unit which consistsof areas of exposed weathered limestone bedrock on hillsides and areas of unconsolidated overburdendeposits of clayey sands within surface depressions. The overburden deposits overlie limestonebedrock. The surficial clayey-sands likely retard the infiltration of surface water runoff, effecting rapidsurface runoff towards the on-site topographic depressions.

5.2.1.3 Groundwater Flow

Contaminant transport rates and groundwater flow direction are determined by site-specifichydrogeologic properties. The V&M Site is underlain by the Aymamon-Aguada unconfined aquifersystem. The water table is encountered in the lower portion of the Aguada Formation in all on-sitewells. The Cibao Formation, which underlies the aquifer unit, was not encountered during drilling, butlikely acts as a lower confining unit. Potential shallow confining layers within the aquifer unit have notbeen identified. The lower portion of the Aguada Limestone unit consists of a more sand-rich limestonewhich may act as an aquitard, limiting the vertical movement of groundwater. In addition, the surficialclayey-sands likely retard the infiltration of surface water.

Groundwater flow is north-northwesterly, towards the Rio Indio. Hydraulic gradients across the Siteappear to vary as a function of the localized topography. The average hydraulic gradient within theAguada Formation in the southern portions of the site is ±0.0111 which attenuates to ±0.0070 on thenorthern portion of the site. Groundwater velocities for the Aymamon and Aguada formations in thestudy area's vicinity are 0.1 centimeters per second (cm/s) and 0.005 cm/s, respectively (Giusti, 1978).Vertical hydraulic gradients have not been calculated using site-specific well information. However,a qualitative assessment was made to determine upward hydraulic gradient indicating zones of aquiferdischarge (i.e., upward flow) and downward vertical hydraulic gradients indicating zones of aquiferrecharge. The sinkholes are considered aquifer recharge sinks.

5.2.1.4 Soil Chemistry

The soil properties most affecting inorganic contaminant persistence and mobility include:

• redox potential (Eh);• pH; and• total organic carbon (TOC) content.

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Redox potential of the subsurface affects the speciation of contaminants, and hence their mobility orpersistence in the environment. Microbial activity and organic contaminants may create reducingconditions.

pH of soils and groundwater affects hydrolysis rates, equilibrium partitioning conditions, andcontaminant solubility. In March 1997, a limited number of surface soil, 0"-6"below ground surface(bgs) samples collected from burn areas across the site were tested for pH, with values between 6.7 and7.7. In areas where unknown numbers of car batteries were destroyed, the pH may locally have beenmuch lower due to releases of unknown quantities of sulphuric acid; this could have had a significanteffect on the solubility and mobility of the heavy metals. Soil pH tested during on-site well installationin January 1998 identified surface soils with pHs between pH 6 and 7; but as low as pH 5.5 down toapproximately six feet bgs at MW-3, which is located within former Burn Zone 3 (see soil boring logsin Appendix C). These observations indicate that acidic leachates derived from the past disposal ofacids, especially within burn areas, have infiltrated soils and are migrating slowly downwards.

Total organic carbon content - High organic carbon content in the site soil increases contaminantabsorption and hinders the movement of contaminants through the soil. Since the top soil in thecontaminated burn areas have been removed, the TOC of remaining surface soils is generally low, andis mainly that of the clayey-sand subsoil.

5.2.2 POTENTIAL CONTAMINANT TRANSPORT PATHWAYS

There are several potential contaminant transport pathways for contaminants identified at the site(Figure 5-1), including:

• Vertical infiltration of contaminated leachate into the unconfmed aquifer;• Migration of chemical contaminants present in soil via surface runoff;• Direct migration via karst fractures (macropores), where transport to the water table is

rapid;• Discharge of contaminated groundwater to downgradient water bodies; and• Uptake of contaminants in soil by biota.

5.3 CHEMICAL AND PHYSICAL PROPERTIES OF CONTAMINANTS

To predict the persistence and potential migration of contaminants in soils and groundwater, it isnecessary to identify which contaminants are likely to leach or degrade (biotically or abiotically). Thisdepends on a given chemical's physical and chemical properties and the properties of the media throughwhich it migrates. Table 5-1 presents the chemical and physical properties of the contaminants. Thefollowing sections describe the persistence and mobility of the identified contaminants, focusing onsuch properties as dissolution/precipitation, biotransformation, adsorption, andbioaccumulation/bioconcentration.

5.3.1 CONTAMINANT PERSISTENCE (FATE)

Contaminant persistence describes the length of time that a contaminant will remain in its originalchemical state in the environment. The chemicals that will persist in a given medium are those that form

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insoluble precipitates, or resist biodegradation, hydrolysis, and volatilization.

5.3.1.1 Processes that Affect Persistence

The major processes affecting the fate, or persistence, of site inorganic COPCS in soils and groundwaterare dissolution and precipitation which are processes by which the volume of a given metal in theenvironment may be reduced or increased. Redox conditions and pH govern the stability of metals anddetermine whether a metal will precipitate from solution and what ionic species (or phase) of dissolvedmetals will be present.

5.3.1.2 Persistence of Inorganic Analvtes ^

The metal contaminants at the site are relatively insoluble in water, especially lead, and show hightendencies to adsorb to soil or organic matter in soil, or be suspended in aqueous media. Thepersistence of metals will depend on the rates of leaching, amount of rainfall, and individual metalproperties. The persistence of metals is complicated by processes such as precipitation and dissolutionwhich are dependent upon pH, the presence of certain ions or complexing agents and concentrationsof the metals in solution. These factors are discussed further under mobility, below.

5.3.2 CONTAMINANT MOBILITY (TRANSPORT)

The major processes affecting the transport, or mobility, of the metals in soils and groundwater arebioaccumulation/bioconcentration, adsorption, and dissolution/precipitation.

\ Bioaccumulation/bioconcentration. Some chemicals, such as lead, pesticides and PCBs, tend tobioaccumulate/bioconcentrate in animal or plant tissue. In fact, plant uptake is sometimes used as aremedial strategy to remove these contaminants from soils and sediment.

Adsorption. Metals become mobilized in surface soils by forming solutes which may react withsurfaces of soil solids, especially clays, creating chemical bonds between the surface and metal ion.Most clay minerals have an excess of imbalanced negative charges in the crystal lattice. Adsorptiveprocesses in soils thus favor the adsorption of cations. Divalent cations are usually more stronglyadsorbed than monovalent ions. Attenuation of metals through adsorption varies from those that areweakly attenuated, such as sodium, potassium, magnesium; moderately attenuated, such as iron; andthose which are strongly adsorbed, lead, cadmium, mercury, and zinc.

Dissolution/precipitation. Whether a chemical is transported in a dissolved state in infiltrating rainwater or groundwater or is precipitated out of solution depends on the solubility of that chemicalrelative to water. Most metals are relatively insoluble, but metal solubility is highly dependent uponredox conditions and pH. The past on-site disposal of car batteries and discharge of acids at unspecifiedlocations at the site likely will have contributed to the rapid dissolution of metals in the soil. Anyremaining metal contaminants reaching the groundwater are likely to be preferentially precipitated asinsoluble salts under the slightly elevated pH conditions of the karst aquifer.

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5.3.2.1 Mobility of Metals

A variety of factors affect the mobility of metals in soil/water systems, including:

• the presence of water (soil moisture content);• the presence of other complexing chemicals in solution;• the pH and oxidation/reduction potential, which affect the speciation of all metals and

complexing agents;• the temperature; and,• soil properties, such as cation exchange, the presence of hydrous oxides of iron and

magnesium, and the presence of organic matter. |

It is difficult to predict the mobility of metals because of the wide range of soil conditions in theenvironment and the resulting high variability of certain physical parameters. Soil sorption constantsmay vary over several orders of magnitude for a given metal in different soils and/or under differentenvironmental conditions. Thus, there is no single sorption constant describing the binding of metalsin solution to soils and no one mobility prediction holds for all environmental conditions.

In a study of metals retention in soils, the relative mobility of 11 metals in various soil types wasassessed (EPA, 1978). The study concluded that chromium, mercury, and nickel are among the mostmobile, while lead and copper are the least mobile. For the metals studied, the mobility varied with theconditions, although the order of mobility was generally:

Most Mobile~As>V>Se>Cd>Zn>Be~Least Mobile

For this investigation, estimates of overall mobility were made for each metal COPC, based on theanticipated speciation of the chemicals in fresh water, general solubility patterns, and general soilsorption patterns. Guidelines used to assign metals to a mobility group (high, medium, or low) were:

• metals whose predominant species in freshwater are anions (e.g., arsenic, and vanadium)which are only minimally retarded in soils, are among the most mobile;

• metals known to be fairly strongly sorbed to most soils under normal environmentalconditions (i.e., pH 6 to 8 near neutral redox potential) are among the least mobile; and

• metals whose predominant freshwater species are cations, especially divalent heavymetals (i.e., copper, lead) which are subject to sorption via cation exchange, are amongthe least mobile.

The relative mobilities assigned to the metal contaminants are shown in Table 5-2; some of them aredescribed below.

Aluminum. Aluminum is generally mobile in the environment. It occurs as a hydrated aluminum ionbelow pH 4.0 and forms strong complexes with fluorine above pH 10.0.

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Arsenic. Arsenic is generally mobile and is known to volatilize when biological activity or highlyreducing conditions produce arsenic or methylarsenics. Sorption may be significant.

Barium. Barium has a generally low solubility and readily forms insoluble carbonates and sulfate salts.It is not soluble at more than a few ppm.

Cadmium. Mobile in the aquatic environment, cadmium complexes with organic materials andsubsequently adsorbs to sediments. Sorption of cadmium is influenced by the clay and metal oxidecontent of the soil and sediment and is a pH-dependent process that increases with increasing pH.

Chromium. The mobility of chromium in soils depends on its oxidation state. It is most often foundin the oxidation state Cr(DT) and, to a lesser extent, Cr(VI). Chromium can be adsorbed or complexedto soil particles, metal oxides, or organic matter and is therefore rather immobile. Most of the Cr(rfl)found in soils is mixed Cr(III) and Fe(HI) oxides or in the lattice of minerals, although Cr(D3)complexed with organic ligands may stay in solution for over a year. Cr(in) is mobilized only in veryacidic soil media. Cr(VI), by contrast, is easily mobilized, independent of the soil pH. The absorptionof chromium onto clays is pH dependent; Cr(m) adsorption increases as pH increases, whereas Cr(VI)adsorption decreases as pH increases.

Copper. Copper is one of the least mobile metals. Processes that render it relatively immobile in soilsare adsorption, precipitation, and organic complexation. The solubility of copper decreases in the pH7 to 8 range. Below pH 7, copper hydroxide cations are formed, and above pH 8, anionic complexesare formed. Copper mobility is enhanced when organic compounds, such as fulvic and humic acids,complex with copper.

Lead. Lead is virtually immobile in all but sandy soils. Its predominant fate in the environment issorption to soils and sediments. The adsorption of lead is pH dependent, decreasing with decreasingpH. Below pH 7, lead becomes progressively more mobile. In natural water, lead concentrationsdecrease over time; sorption of lead to both sediments and suspended particulates is the favored processwith clay, hydrous metal oxides, and organic matter influencing this sorption.

Silver. Silver is readily sorbed and immobilized in soils, particularly by magnesium dioxide, ferriccompounds, and clay minerals. Sorption and precipitation processes are effective in reducing theconcentration of dissolved silver in natural water and result in higher concentrations in the bedsediments than in the overlying waters.

Zinc. Suspended zinc may dissolve or sorb to suspended matter, whereas, dissolved zinc may occur asfree zinc ion or as dissolved complexes or compounds varying in stability and toxicity.

5.3.2.2 Mobility of Site Contaminants in Groundwater

CDM Federal (1997c) presented mathematical models to estimate the potential for site metalscontamination in soils to migrated through the vadose zone into groundwater beneath Zone 3, the largeon-site karst depression containing at least two sinkholes which have had the potential to be the primaryconduits for site contaminants reaching the aquifer.

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CDM Federal (1997c) proposed two possible transport mechanisms by which contaminants in V&Msite soils could migrate to groundwater:

• by metals leaching through soil pore space and unsaturated limestone; or• by direct transport through fractures or limestone dissolution features.

The adsorption/desorption process is the dominant means of contaminant attenuation in the firstmethod, whereas geochemical equilibrium and dilution are the dominant factors in the second. Eitherone of these migration mechanisms, or a combination of both, may have operated at the site.Results of the vadose zone modeling exercise indicate that there was a very low potential for sitecontaminants to significantly impact groundwater under a soil leaching scenario. The relatively highdistribution coefficients (Kds) of the site metals and the clayey composition of the site soils wouldcontribute to high rates of metals adsorption, rapid attenuation of contaminant concentrations withdepth, and very slow transport to the water table. The observed limited distribution of contaminants insite soils prior to the removal action supports this scenario. Prior to, and during the soil removal action,high concentrations of metals were found in surface soils, but decreased to near-background levelswithin a foot or two of the surface. Under this modeled scenario, maximum groundwater metalsconcentrations would not occur for hundreds of years, assuming an ongoing soil source existed. Giventhat the worst potential soil sources were removed by the end of March, 1998, the risks to groundwaterappear to be minimal if soil leaching is the predominant migration mechanism at the site. Any residualelevated concentrations of metals that remain since the soil removal action was completed do not posea significant threat to groundwater under the soil leaching scenario.

The karstic nature of the site's terrain suggested that direct transport of contaminants through verticalsolution fractures may be a more significant transport mechanism at the V&M site. When this scenariowas evaluated, the results indicated that site contaminants could have caused groundwater to exceeddrinking water standards within a relatively short time (days) if they were flushed through limestonefractures by rainwater. However, the resulting concentrations predicted under this modeled scenariowere probably unrealistically high due to the very conservative assumptions made concerning thesolubility state of the metals, the quantity of source material present, the time needed to develop anequilibrium leachate, and the amount of dilution that would occur once contaminants entered theaquifer.

Notably, bedrock fractures and conduits have not been observed within the sinkhole depressions;instead, they are overlain by considerable thicknesses of overburden soils (up to 65 feet) which are notlikely to contain permeating fractures through which surface runoff could flow. Contaminantconcentrations likely would undergo rapid attenuation in the overburden before being leached down tothe bedrock drainage network. Therefore, a direct surface runoff pathway to the water table, via surfaceconduits, likely would be characterized by contaminant attenuation before significant impact togroundwater could occur.

5.4 SUMMARY OF CONTAMINANT FATE AND TRANSPORT

The inorganic chemicals of potential concern detected in the groundwater of the site possess varyingchemical properties which affect their speciation and transport in the soil. Each metal therefore willbehave differently. The metals are generally low to moderately mobile in the site's clay-rich soils and

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show high absorption to soils depending on the existing conditions (e.g., pH and the presence ofanions). The risks to groundwater appear to be minimal if soil leaching is the predominant migrationmechanism at the site. Past disposal of car batteries and battery acid likely would have mobilizedmetals in the soil, accelerating their downwards migration towards the water table. However, theflushing action of rainwater infiltration probably diluted the acidic solutes, thereby immobilizing themetal salts.

Metals-contaminated runoff may have impacted groundwater through conduit flow, via sinkholes andfractures, prior to the soil removal action. Elevated levels of lead and nickel in Round 1 groundwatersampling could be attributable to this migration pathway. Of note, Round 1 sampling was conductedduring the soil removal activities, such that surface soil contamination sources may still have beenpresent, with contaminants mobilized during surface runoff "flushing" events.

The soil removal action was completed in March 1998, effectively removing the source of groundwatercontamination. Consequently, it is assumed that no further contaminants were released to the aquiferafter March 1998. Also, it is assumed that Round 1 sampling results indicate levels of contaminationat the tail end of a slug of contaminated groundwater.

The most conservative estimate for the fate and transport of site-derived contaminants is to calculatethe approximate downgradient distance contaminants may have traveled in the aquifer from the sitesource. The groundwater velocity beneath the site was not measured during the RI; however, theslowest, most conservative groundwater velocity that has been published in the site's vicinity is 0.005cm/s, measured from the Aguada Formation (Giusti, 1978). Groundwater velocities within theoverlying Aymamon Formation in the study area's vicinity are 0.1 cm/s. Hydraulic gradients measuredacross the Site appear to vary as a function of the localized topography and slope towards the north-northwest, towards the Rio Indio.

We assume that the site contaminant source was removed by the end of March, 1998 (after the soilremoval action was completed), and that the tail end of the groundwater contaminant slug travelednorth-northwest at a velocity of 0.005cm/s. The time since the tail end of the slug left the site isapproximately 18 months at October 1999. Therefore, the distance traveled by the slug can becalculated:

18 months (April, 1998-October, 1999) = 548 days = 13,152 hours = 789,120 minutes = 47,347,200seconds so:

Distance Traveled = 47,347,200 x 0.005= 236,736 cm= 2.36736 km= 2.36736 / 1.6 = 1.4796 miles

The Rio Indio is approximately 0.4 mile to the northwest of the site and has been identified as a gainingriver which is recharged from groundwater. Therefore, it is likely that the Rio Indio is a discharge pointfor site groundwater. The Rio Indio flows north and discharges into the Atlantic Ocean.

Subsequent sampling rounds (Rounds 2, 3, and 4) were conducted after the completion of the soilremoval action and did not detect consistently elevated concentrations of heavy metals. Analytes were

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detected less frequently and at lower exceedances of screening criteria. Round 4 sampling detected noanalytes above screening criteria. These results suggest that there has not been a lasting impact to on-site or off-site groundwater by the release of the site-specific contaminants. Residual concentrationsof metals in the remaining soils and those sporadically-detected in groundwater are expected to decreaseby adsorption to soils and by dilution in the groundwater, respectively. Any remaining metalcontaminants reaching the groundwater are likely to be preferentially precipitated as insoluble saltsunder the slightly elevated pH conditions of the karst aquifer.

5-9300809

6.0 SUMMARY AND RECOMMENDATIONS

This section provides a summary of the major findings of the RI. The conclusions drawn from theinvestigation that was conducted concerning the nature and extent of contamination in groundwater andthe fate and transport of contaminants are discussed below. The site risk assessments (human healthand ecological) have been submitted as separate documents.

6.1 SOURCES OF CONTAMINATION

Historical records and aerial photographs indicate the site was originally a forested area consisting oftwo properties used for rough pasture and farming. Commencing from an unknown date, the site wasused for dumping plastic-coated electric cables, electrical equipment, and car batteries. The wasteswere burned to recover metals. It is not known when the burning activity began on either the V&M orthe Albaladejo farm properties. Burning reportedly ceased in 1986 when the V&M farm was purchasedby its current owner, but continued until 1988 on the Albaladejo farm. The total quantity of wastedisposed and burned at the site is unknown.

In November, 1994, during the Removal Assessment, surface and subsurface samples from burn areasacross the site were collected by TAT and the Puerto Rico EQB. Elevated levels of arsenic, aluminum,antimony, cadmium, copper, lead, and silver were found in surface and subsurface soils (Roy F.Weston, 1999).

EPA's time-critical soil removal action was conducted during January through March, 1998.Contaminated soils were removed from the former burn areas by an EPA contractor. Contaminatedsoils were stockpiled and stabilized on-site in a designated area prior to their removal and properdisposal. Clearance testing of burn area surface soils after the removal action indicated concentrationsof lead, one of the primary contaminants of concern, had been reduced to below 500 ppm, the site-specific surface soil screening level for lead (Roy F. Weston, 1999).

In February 2000, the EPA Removal Action Branch returned to the site and collected 17 surface soilsamples in areas just outside of the excavation zones, in native soils. The samples were collected from0-6 inches and analyzed for full TAL metals. Samples were collected around five burn areas, with twoat Burn Area 1; two at Burn Area 2; four at Burn Area 3; four at Burn area 4; and five at Burn Area 5.Three background samples were also collected; one from each of Burn Areas 1,4, and 5. Samples wereanalyzed through a CLP laboratory and validated by EPA.

Two samples had detections of lead above the 500 ppm action level: VMA2-02 in Burn Area 2 andVMA4-03 in Burn Area 4. In May 2000, EPA collected additional surface soil samples around eachof the sample locations with elevated lead results, using XRF to screen the samples prior to submissionto the CLP laboratory for lead analysis. One sample was elevated, but sampling around this locationindicated it was a unique occurrence and the elevated level was not repeatable. The February surfacesampling results were used in the screening level ecological risk assessment.

6.2 NATURE AND EXTENT OF CONTAMINATION

A summary of the nature and extent of contamination found in groundwater is provided below.

6-1300810

6.2.1 ON-SITE SAMPLING ROUNDS

Based on the review of the four rounds of groundwater analytical results, the frequency of contaminantMCL exceedance at the V&M Site is sporadic. No sampling locations exhibited consistently elevateddetections of any organic compound or inorganic analyte.

Organic compounds were sporadically detected; the only exceedance of screening criteria occurredduring Round 1 with the detection of PCE in MW-6, an upgradient background well. PCE was notdetected in MW-6 in Round 2 or Round 3. No other organic compounds exceeded their screeningcriteria in Rounds 1, 2, or 3 (detection of organic compounds was limited to a single exceedance of thescreening level by PCE in MW-6 during Round 3). Organic compounds were not analyzed in Round4.

Inorganic analytes also were detected sporadically, however, exceedances of inorganic primary drinkingwater standards were noted for antimony, cadmium, chromium, lead, and nickel. In Round 1, elevatedlead concentrations were detected in downgradient wells MW-1, MW-3, and MW-4; the highestexceedance found in MW-1. Also, an elevated nickel concentration was found in MW-3. In Round 2,a single exceedance of cadmium was detected in MW-3. In Round 3, the only detection and exceedanceof antimony was found in MW-6, and an exceedance of chromium was detected again in MW-3. Anexceedance of lead occurred in MW-4, only. There were no exceedances of inorganic analytes forRound 4 sampling.

Inorganic data suggest that site-related metals contamination has decreased in magnitude since theinitial on-site well sampling round. The elevated levels of lead and nickel observed in Round 1 werenot observed in later sampling rounds (Rounds 3 or 4); results for lead in Round 2 were rejected by thevalidator due to laboratory problems.

It is possible that the elevated metals concentrations observed in Round 1 have either migrated furtherdowngradient and off site or have attenuated naturally in situ. For each sampling round, the on-sitebackground well results (MW-5 and MW-6) did not exhibit significantly lower analyte detectionscompared with those of the remaining on-site wells. This could suggest that the analytes detected onsite are derived from an off-site upgradient source, or that they occur naturally. The single exceedanceof PCE in Round 1 and antimony in Round 3 was associated with MW-6, and, therefore, was unlikelyto be attributable to any former on-site soil contamination.

6.2.2 OFF-SITE WELL SAMPLING

Water quality in all private and municipal wells within a 1.5-mile radius of the site was assessed. Oneupgradient background residential supply well and five side gradient agricultural/municipal supply wellswere sampled during the week of December 1, 1997. The results of the well sampling event do notidentify exceedances of inorganic MCLs for any sample. A laboratory detection limit of 10 ng/1 wasused for analyses of VOCs; this detection limit is above the MCL for some compounds. Nonetheless,levels of VOCs were not detected above 10 ug/1 and are not known historically to be a concern at theV&M site. The side gradient well samples did not contain noticeably greater concentrations of COPCscompared with the upgradient background well. Low concentrations of a SVOC commonly associatedwith laboratory sample preparation and detections of three pesticides were noted in four of the wells.

6-2

300811

Several inorganic analytes were detected at concentrations well below their respective MCLs. Of note,the analyte concentrations from the upgradient off-site background well are higher than the side gradientoff-site wells (with the exception of zinc). This suggests that groundwater quality in side gradient wellshas not been affected by surface contaminant releases from the V&M Site.

6.2.3 OFF-SITE SPRING/SEEP SAMPLING

Two spring/seeps were identified along the Rio Indio valley, downgradient from the site, and atpotential discharge points for groundwater derived from the site. Sampling results from the December,1997 and Round 2 sampling events were compared with the relevant National Recommended WaterQuality Criteria-Correction (EPA, 1999). Aluminum was detected 3.1 times above the Surface WaterQuality Criteria: Continuous Concentration (CCC) in both samples collected from Spring-1. None ofthe other detected analytes were above their respective screening criteria, where criteria have beenestablished.

6.2.4 RELATIONSHIP BETWEEN SOIL AND GROUNDWATER CONTAMINATION

The contaminants identified in the on-site groundwater are similar to those previously identified by theEPA's soil removal contractors prior to the soil removal action (Weston, 1997). The inorganiccontaminants found above soil clean up guidance levels in the on-site soils prior to the soil removalaction were aluminum, arsenic, antimony, cadmium, chromium, lead, and silver. Only antimony,cadmium, chromium, and lead were detected in on-site groundwater above primary drinking waterstandards.

Surface soils impacted with organic compounds such as toluene, fluoranthene, pyrene, and the pesticide4,4-DDD, compounds detected in the 1989 EPA Site Investigation (Weston, 1997), were not detectedin groundwater during this RI.

6.3 SUMMARY OF CONTAMINANT FATE AND TRANSPORT

The inorganic chemicals of potential concern detected in the groundwater of the site possess varyingchemical properties which affect their speciation and transport through soil. Each metal therefore willbehave differently. The metal COPCs are generally low to moderately mobile in the site's clay-richsoils and show high absorption to soils depending on the soil conditions (e.g., pH and the presence ofanions). The risks to groundwater appear to be minimal if soil leaching is the predominant migrationmechanism at the site. Past disposal of car batteries and battery acid likely would have mobilizedmetals in the soil, accelerating their downwards migration towards the water table. However, theflushing action of rainwater infiltration likely would dilute the acidic solutes and immobilize the metalsalts.

Metals-contaminated runoff may have impacted groundwater through conduit flow, via sinkholes andfractures, prior to the soil removal action. Elevated levels of lead and nickel in Round 1 groundwatersampling could be attributable to this migration pathway. Of note, Round 1 sampling was conductedduring the soil removal activities, such that a surface soil contamination source may still have beenavailable and mobilized during surface runoff "flushing" events. The results of Rounds 2 and 3 showCOPCs were detected less frequently and at lower exceedances of screening criteria. There were no

6-3300812

inorganic exceedances for Round 4 sampling.

The EPA soil removal action was completed in March 1998, effectively removing the source ofgroundwater contamination. Consequently, it is assumed that significant releases of contamination tothe aquifer ceased at that time. It is also assumed that Round 1 sampling results indicate levels ofcontamination in the tail end of a slug of contaminated groundwater.

The most conservative estimation for the fate and transport of site-derived contaminants is to calculatethe approximate downgradient distance contaminants may have traveled in the aquifer from the sitesource. The groundwater velocity beneath the site was not measured during the RI; however, theslowest, most conservative groundwater velocity that has been published in the site's vicinity was used.Assuming that the site contaminant source was removed by the end of March, 1998, we calculate thatthe tail end of the groundwater contaminant slug would have traveled more than one mile north-northwest at a velocity of 0.005cm/s. The Rio Indio is approximately 0.4 mile to the northwest of thesite and has been identified as a gaining river which is recharged from groundwater. Therefore, it islikely that the Rio Indio was a discharge point for site contamination. The Rio Indio flows north anddischarges into the Atlantic Ocean.

Subsequent sampling rounds (Rounds 2, 3, and 4) were conducted after the completion of the soilremoval action and did not detect consistently elevated concentrations of heavy metals. Analytes weredetected less frequently and at lower exceedances of screening criteria. Round 4 sampling detected noanalytes above screening criteria. These results suggest that there has been no lasting impact to on-siteor off-site groundwater by the release of the site-specific contaminants. Residual concentrations ofmetals in the remaining soils and those sporadically-detected in groundwater are expected to decreaseby adsorption and dilution, respectively.

6.4 CONCLUSIONS

The significant findings of the RI investigation are as follows:

• Analytical data collected during this RI, combined with historical data, suggest that the primarysource of contamination was derived from metals-contaminated soils located within at least fourdiscrete burn areas across the site, most of which are within or around a large central karstdepression containing sinkholes. Burn areas formed where electrical equipment and cables wereillegally burned to recover metals. In early 1998, contaminated soils were removed from theformer burn areas by an EPA contractor. Clearance testing of burn area soils after the removalaction indicated concentrations of lead, one of the primary COPCs, had been reduced to below500 ppm, the sample-specific screening level.

Site groundwater contained elevated levels of some inorganics (Rounds 1, 2, and 3, only).Similar analytes were detected during the soil removal action. This suggests that soilcontamination, particularly from lead, was mobilized prior to the soil removal action, and hadmigrated vertically to the underlying groundwater. There were no exceedances of the inorganicscreening criteria for Round 4 sampling. Any residual concentrations of metals remaining insite soils since the removal action and those sporadically-detected in groundwater are expected

6-4300813

to attenuate naturally through adsorption and dilution, respectively.

• No inorganic analytes were detected in the closest off-site private/municipal wells ordowngradient spring/seeps above Federal primary drinking water standards. A laboratorydetection limit of 10 u.g/1 was used for analyses of VOCs in the off-site private/municipal wells;this detection limit is above the MCL for some compounds. Nonetheless, levels of VOCs werenot detected above 10 ug/1 and are not known historically to be a concern at the V&M site. Thedrinking water quality in side gradient supply wells does not appear to be threatened by site-related contaminants, especially since the supply wells are side gradient from the site.

6.5 RECOMMENDATIONS FOR FUTURE WORK

The conclusions of this RI indicate that contaminated soils in the former on-site burn areas have beenremoved. Therefore, there is very little further contribution of contaminants to groundwater. No furtherwork is recommended at the V&M Site.

6-5300814

7.0 REFERENCES

American Society for Testing and Materials (ASTM), 1995. Standard Guide for Design of Ground-Water Monitoring Systems in Karst and Fractured-Rock Aquifers. Designation D 5717-95, AnnualBook of ASTM Standards, Vol 04.08.

Briggs, R.P., 1966. The Blanket Sands of Northern Puerto Rico: in Caribbean Geological Conference,3rd Kingston Jamaica, 1962, Transactions: Jamaica Geology Survey Publication 95, p. 60-69.

CDM Federal Programs Corporation (CDM Federal), 1997a. Final Work Plan, RemedialInvestigation/Feasibility Study, V&M/Albaladejo Farms Site, Vega Baja, Puerto Rico. Preparedby CDM Federal for the U.S. Environmental Protection Agency, Region n. April 30.

CDM Federal Programs Corporation (CDM Federal), 1997b. Final Project Operation Plan, RemedialInvestigation/Feasibility Study, V&M/Albaladejo Farms Site, Vega Baja, Puerto Rico. Preparedby CDM Federal for the U.S. Environmental Protection Agency, Region n. May 28.

CDM Federal Programs Corporation (CDM Federal), 1997c. Estimation of soil contaminant migrationto groundwater, Remedial Investigation/Feasibility Study, V&M/Albaladejo Farms Site, VegaBaja, Puerto Rico. Prepared by CDM Federal for the U.S. Environmental Protection Agency,Region n. June 26.

Ford, D.C. and Williams, P., 1989. Karst geomorphology and hydrology. Unwin Hyman, London.

Giusti, E.V., 1978. Hydrogeology of the Karst of Puerto Rico. Geological Survey Professional Paper1012,p.68.,2pls.

Giusti, E.V., and Bennett, G.D., 1976. Water resources of the north coast limestone area, Puerto Rico.U.S. Geological Survey Water-Resources Investigation Report 75-42, 42 p.

Gomez-Gomez, F. and Torres-Serra, H., 1988. Hydrology and Effects of Development on the Water-Table Aquifer in the Vega Alta Quadrangle, Puerto Rico. United States Geological Survey,Water Resources Investigation Report 87-4105, 55 p

LaFleur, R.G., 1999. Geomorphic aspects of groundwater flow. Hydrogeology Journal 7, p.78-93.

Malcolm Pirnie, Inc. 1996. Final Hazard Ranking Documentation, V&M/Albaladejo Farm Site, VegaBaja, Puerto Rico: Volumes 1 and 2.

Monroe, W.H., 1976. The karst landforms of Puerto Rico. U.S. Geological Survey Professional Paper899, 67 p.

Monroe, W.H., 1980. Geology of the Middle Tertiary Formations of Puerto Rico. U.S. GeologicalSurvey Professional Paper 953, 93 p.

7-1300815

Rodriguez-Martinez, J., 1995. Hydrogeology of the North Coast Limestone Aquifer System of PuertoRico. U.S. Geological Survey Water Resources Investigation Report 94-4249, 22 p.

Torres-Gonzalez, A. and Diaz, J.R., 1985. Water Resources if the Sabana Seca to Vega Baja Area,Puerto Rice. U.S. Geological Survey Water Resources Investigation Report 94-4198, 151 p.

Torres-Gonzalez, A. and Wolansky, R.M., 1984. Planning report for the comprehensive appraisal ofthe ground-water resources of Vieques Island, Puerto Rico. U.S. Geological Survey Report 80-427, 32 p.

U.S. Environmental Protection Agency (EPA), 1994a. USEPA Contract Laboratory Program NationalFunctional Guidelines for Inorganic Data Review. EPA-540/R-94-013.

U.S. Environmental Protection Agency (EPA), 1997. Aerial Photographic Analysis, V&M/AlbaladejoFarms, Vega Baja, Puerto Rico. Characterization Research Division, Research andDevelopment. TS-PIC-9702225S. January.

U.S. Geological Survey (USGS), 1996. Atlas of Ground-water Resources in Puerto Rico and theU.S. Virgin Islands. Water Resources Investigations Report 94-4198.

WestonRoy F. 1997. X-Ray Fluorescence Analysis, V&M/Albaladejo Farm Site, Vega Baja, PuertoRico. Submitted to Eric Wilson, EPA Region n on March 13, 1997.

Weston, RoyF. 1999. Sampling Trip Report, V&M/Albaladejo Farms Site, Vega Baja, Puerto Rico.Prepared by Superfund Technical Assessment and Response Team, Roy F. Weston/R.E.Sarrierra & Associates, February, 1999, 42 p.

7-2300816

Table 2-1Construction Specifications for Monitoring Wells

Remedial Investigation, V&M/Albaladejo Farms Site. Vega Baja, Puerto Rico

i%-^v f

Werii.D."^1^^^Vl~:;-!§$r--

MW-1MW-2MW-3MW-4MW-5MW-6

.".- V ; ;::;v ' :i?iX Date X^r *iVtostalled:?V. -:•• '; v-1'1

Feb-11-98Feb-17-98Feb-28-98Feb-02-98Mar- 10-98Mar-04-98

, /.Ground .-:',;'.^vûrfiice'i,/;-Êlevation *„;

.{ft. amsl) ''••222.32195.19173.76241.50231.29221.09

:V:;,,.;v?l-:'r:, .,v,;4(;,Top of Casing^

.-*?;- Elevation'* ••$&s Itftranisl)^"*:

224.43197.75176.45244.37235.09221.85

.;{..;:, Screen, ?j]j;-Înterval f ' pi;,v;- Elevation iJ4;-^ '(ft; amsl) v;

62.32-43.3268.19-48.1978.76-58.7671.50-51.5094.29-74.2999.09-79.09

Bottom of :v'-i 'i-''*^ffjfcH '•'' ..••'" •- •..,;•; -: ww dJI -'Ji^.t • . •

'Elevation'(ft. amsl) '

39.9744.9956.1648.5561.5967.09

.-.iV^,;;-:

..'•.Screen sInterval(ft. bgs)160-180127-14795-115170-190147-167122-142

.; • ;: >

Total;;Depth(ft. bgs182.35150.20117.60192.95169.70154.00

.•..;,J^v;!:^.,'v ; Well^gi, Diameter

(In.)444444

•*U;;v'> .Casing kMaterial

PVCPVCPVCPVCPVCPVC

ScreenMaterial.

PVCPVCPVCPVCPVCPVC

Note:Elevations are from the top of the concrete pad around each well.Elevation of the top of the inner (PVC) casing at the file cut with the lid removed from the well.

amsl - above mean sea levelbgs - below ground surface

COooCDM

COM Federal Programs Corporation mwspec.xls

Table 2-2On-Site Groundwater Sampling Summary

Rounds 1, 2, 3, & 4, 1998Remedial Investigation, V&M/Albaladejo Farms Site, Vega Baja, Puerto Rico

MW-1 MW-1-R1 160-180 Apr 04 98 Downgradient from central sinkholesMW-1-R2 May 1898MW-1-R3 Sep1098MW-1-R4 Nov 11 98

MW-2 MW-2-R1 127-147 Apr 04 98 Between two central sinkholesMW-2-R2 May 20 98MW-2-R3 Sep1098MW-2-R4 Nov12 98

MW-3 MW-3-R1 95-115 Apr 01 98 Immediately downgradient from large central sinkholeMW-3-R2 May 19 98MW-3-R3 Sep1098MW-3-R4 Nov12 98

MW-4 MW-4-R1 170-190 Apr 01 98 Downgradient from drum staging area, NE comer of siteMW-4-R2 May 18 98MW-4-R3 Sep 09 98MW-4-R4 Nov 11 98

MW-5 MW-5-R1 147-167 Apr 02 98 Upgradient from large sinkhole - backgroundMW-5-R2 May 1998MW-5-R3 Sep 10 98MW-5-R4 Nov 10 98

MW-6 MW-6-R1 122-142 Apr 01 98 Southeast portion of site, backgroundMW-6-R2 May 1898MW-6-R3 Sep 09 98MW-6-R4 Nov 1098

COM Federal Programs Corporation 300818samp_sum_on

TahTf> 2-3 .

A , ed and Data Validation Results for each Sampling RoundFractions Analyzed and Data *»"" Sami,llntf Summary

r^ v b aTerF^ e. Vega Baja, Puerto RicoRemedial Investigation, V&M/Albalaaejo _______^;i!;i!i;,!ia;-j—————^~

îljjiîîji^^j^c&

I ^l^ V *±S**s*Jt w ' — '

Round 1 pest/PCBs, and TAL Metals

ScTSoCs'3" All valid except zinc in MW-1and MW-5;VOCs.bVUOS, d MW.5-

Round 2,——————————'

Round 3

Round 4_

^ =™«5S" ^gEEp^ s**""*1

TAL Metals. ' ————

COM Federal Programs Corporation300819

Table 2-4Off-Site Groundwater Sampling Summary

Pre-Round Supply Well Sampling Event, 1997Remedial Investigation, V&M/Albaladejo Farms Site, Vega Baja, Puerto Rico

SupplyWell ID

WADPWAIF

WAN-2WAN-3WARRZ

WDD

i.;|t'U-jfSample;Ju.n>i:,f i

••i'V'ifTW!WADPWAIF

WAN-2WAN-3WARRZ

WDD

i; :!./i]"i-illScreenInterval(ft. bgs)

??

205-240120-200

99

uUjj ;Hf

Geologic•ttliniti'J'p:|.|'f.]W:'

?99

Ciboa9

Ciboa?

•f lf.tJ'i.il4^Uj:|;|jp1ate|;||Collected;i:4|jfffff||

Dec 03 97Dec 04 97Dec 04 97Dec 04 97Dec 04 97Dec 03 97

^S ^':i,'l'rf.;l- ^ ' ' : ' ^:''-: : ' '• ! • ^ : • •" ' : ' ' • ' ' " '• ' " ' ! ^ ^ ' ! '

;!.:f gij.l . H|i%!' II fi -1 Comments " i ::n- ': : .: •:• :: ::fi-**i;tj!-.!i'fy::i.3: . - ' iJik-i. • • : . : • ^ ; • . < - f i i ( n r :1|::ff^;H!:4H;v;!>-ii'irr?:^|:.fcf ; ;Vr' - ; " ; •- i " ' [ •• ; , : • • ' ".;

±1 mile NW, beyond Rio Indio - downgradient3/4 mile ENE from Site3/4 mile ENE from Site

1 1/2 miles NNE - downgradient1 1/4 miles NE

±3/4 mile SE - background

CDM Federal Programs Corporation300820

Table 2-5Spring/Seep Sampling Summary

Pre-Round Sampling Event, 1997 & Round 2, 1998Remedial Investigation, V&M/Albaladejo Farms Site, Vega Baja, Puerto Rico

Spring

Spring-1Spring-1Spring-2

.;? Sample; [•;

""••••r™'-t-!',-i™fe

Spring-1Spring-1 -R2

Spring-2

Collected:.". I.';:- :j,iM'?3KS,

Dec 03 97May 21 98Dec 03 97

:;l|ff{fgf";<6omments "; ' "

,A,,;.?*-^t1— '•; • •,;' •:' .:• -I'" ••.;•• •

1/2 mile WNW - downgradientn u

1/2 mile W - downgradient

CDM Federal Programs Corporation300821

Table 3-1Synoptic Monitoring Well Water Level Summary and Screen Intervals

Remedial Investigation, V&M/Albaladejo Farms Site, Vega Baja, Puerto Rico

Wrier <»ii 4-ll98(fj

Jtoimd; 2 ,v

- 18-98 (ft)

Round ?4

Waterofrl 1-9-98 (ft)'

MW-1 76.00 76.45 79.85 62.32-43.32MW-2 83.20 84.06 88.63 68.19-48.19MW-3 91.20 93.51 100.45 78.76-58.76MW-4 69.51 69.86 70.53 71.50-51.50MW-5 97.22 98.96 105.21 94.29-74.29MW-6 105.74 106.59 110.20 99.09-79.09

amsl - above mean sea level

tooo00roro

COM Federal Programs Corporation

Table 3-2Bird Species Identified at the V&M Site

Remedial Investigation, V&M/AIbaladejo Farms Site, Vega Baja, Puerto Rico

Common Name

Red-tailed Hawk

Puerto Rican Screech Owl

Puerto Rican Lizard Cuckoo

Puerto Rican Woodpecker

Scaly Naped Pigeon

Common Ground Dove

Zenaida Dove

Puerto Rican Tody

Greater Antillean Pewee

Gray Kingbird

Northern Mockingbird

Pearly-eyed Thrasher

Red-legged Thrush

Cave Swallow

Caribbean Martin

Puerto Rican Vireo

Bananaquit

Black-Wiskered Vireo

Stripe-headed Tanger

Puerto Rican Bullf inch

Pin-tailed Whydah

Bronze Mannikin

Scientific Name

Buteo jamaicensis

Otus nudipes

Sauroththera vieilloti

Melanerpes portoricensis

Columba squamosa

Columbine passerina

Zanaida asiatica

Todus mexicanus

Contopus caribaeus

Tyrannus caudifasciatus

Mimus polyglottos

Margarops fuscatus

Turdus plumbeus

Hirundofulva

Progne subis

Vireo latimeri

Coerebaflaveola

Vireo altiloquus

Spindalis iena

Loxigilla portoticensis

Vidua macroura

Lonchura cucullata

Ecological conditions at the V&M site were observed during a site visit in May, 1998.

CDM Federal Programs Corporation

300823

Table 4-1Groundwater Screening Criteria

Groundwater Drinking Water Standards and Guidance ValuesRemedial Investigation, V&M/Albaladejo Farms Site, Vega Baja, Puerto Rico

Page 1 of 2

Constituent

Volatile Organics

Acetone

Methylene Chloride

2-Butanone

Tetrachloroethene

Semi-Volatile Organics

Bis (2-ethylhexyl)phthalate

Pesticides/PCBs

Heptachlor Epoxide

Dieldrin

Endrin

Inorganics

Aluminum

Antimony

Arsenic

Barium

Beryllium

Calcium

Cadmium

Chromium (Total)

Copper

USEPA PrimaryDrinking Water

Standards Part 141MCL [1]

(ne/i)

NS

NS

NS

5

NS

0.2

NS

2

NS

6

50

2000

4

NS

5

100

1300

Puerto RicoWater QualityStandards [2]

(Hg/1)

NS

NS

NS

5

NS

NS

NS

NS

NS

NS

0.022

NS

NS

NS

5

NS

NS

USEPA SecondaryDrinking Water

Standards Part 143SMCL [3]

(MB/1)

NA

NA

NA

NA

NA

NA

NA

NA

50-200

NS

NS

NS

NS

NS

NS

NS

1000

300824

Table 4-1Groundwater Screening Criteria

Groundwater Drinking Water Standards and Guidance ValuesRemedial Investigation, V&M/Albaladejo Farms Site, Vega Baja, Puerto Rico

Page 2 of 2

Constituent

Inorganics (cont.1

Iron

Lead

Manganese

Magnesium

Nickel

Potassium

Selenium

Silver

Sodium

Vanadium

Zinc

Cyanide (as free cyanide)

USEPA PrimaryDrinking Water

Standards Part 141MCL [1]

(iia/1)

NS

15

NS

NS

NS

NS

50

NS

NS

NS

NS

200

Puerto RicoWater QualityStandards [2]

(Mg/1)

NS

50

NS

NS

NS

NS

NS

NS

NS

NS

NS

NS

USEPA SecondaryDrinking Water

Standards Part 143SMCL [3]

(MBA)

300

NS

50

NS

NS

NS

NS

100

NS

NS

5000

NS

Notes:

NSNA[1][2][3]

No StandardNot ApplicableTitle 40 CFR - Part 141, 1995Puerto Rico Environmental Quality Board, Water Quality Standards Regulation, 1987Title 40 CFR - Part 143, 1995

300825

Table 4-2Surface Freshwater Quality Criteria(1)

Remedial Investigation, V&M/Albaladejo Farms Site, Vega Baja, Puerto RicoPage 1 of 2

Constituent

Volatile Organics

Acetone

Methylene Chloride

2-Butanone

Tetrachloroethene

Semi-Volatile Organics

Bis (2-ethylhexyl)phthalate

Pesticides/PCBs

Heptachlor Epoxide

Dieldrin

Endrin Ketone

Inorganics

Aluminum

Antimony

Arsenic

Barium

Beryllium

Calcium

Cadmium

Chromium

Copper

USEPA SurfaceWater Quality

Criteria:Maximum

Concentration(CMC)(US/1)

NS

NS

NS

5,280

NS

0.52

2.5

0.18

*

88p

360

NS

130

NS

3.9+

1,700

18+


Criteria:Continuous

Concentration(CCC)(U£/»

NS

NS

NS

840

NA

0.0038

0.0019

0.0023

*

30p

190

NS

5.3

NS

1.1 +

210

12+

300826

Table 4-2Surface Freshwater Quality Criteria'1'

Remedial Investigation, V&M/AIbaladejo Farms Site, Vega Baja, Puerto RicoPage 2 of 2

Constituent

Inorganics (cent.)

Iron

Lead

Manganese

Magnesium

Nickel

Potassium

Selenium

Silver

Sodium

Vanadium

Zinc

Cyanide


Criteria:Maximum

Concentration(CMC)(MR/1)

NS

82+

NS

NS

1,400+

NS

20

4.1+/0.92p

NS

NS

120+

22


Criteria:Continuous

Concentration(CCC)(HB/1)

1,000

3.2+

NS

NS

160+

NS

5

0.1 2p

NS

NS

110+

5.2

Notes:

(1)

NS

P+

National Recommended Water Quality Criteria- Correction (Revised April, 1999). EPA822-Z-99-001No StandardCriteria are pH dependent: Where pH is between 6.5 and 9.0, the maximum concentrationfor aluminum should not exceed 750 ng/1 and the continuous concentration should notexceed 87 ug/1.Proposed criterionHardness dependent criteria (100mg/CaCO3 used)

CDM Federal Programs Corporation

300827

Table 4-3Results of Round 1 Groundwater Monitoring Well Sampling


Compound/Analyte (|ig/l) MW-1 MW-2 MW-3 MI

Volatile Organic Compounds

Methylene Chloride 0.50 J

2-Butanone

Tetrachloroethene

Semi-Volatile Organic Compounds

Bis (2-ethylhexyl)phthalate 2.00 J 2.00 J 2.00 J

kV-4 MW-5 MYV-6 MW-7 (Dup. of MCLMW-2)

0.50 J NS

4.00 J NS

6.00 5

NS

Pesticides/PCBs

Inorganic Analytes

Aluminum 68.40 B 74.90 B 73.10 723.00 81.00 B NS

Barium 43.30 B 104.00 B 34.90 B 36.50 B 54.10B 23.10B 2,000

Beryllium

Cadmium 2.30 B 0.37 B

3.00 B 4

0.35 B 0.39 B 5

Copper 128.00*1 7.10B 27.50 *J 16.60 B*J 11.80B*J 55.20*J 1,300

tooo00N)00

Federal Programs Corporation



Compound/Analyte (iig/1) MW-1 MW-2 MW-3 M\V-4 MW-5 MW-6 MW-7(Dup. of MCLMW-2)

Iron 122..00 156.00 J 145.00 J 1,490.00 53.80 B 242.00 NS

Lead 56.90 *J R 22.50 15.20 R 5.00 15

Manganese 80.40 42.50 *EJ 21.10*EJ 65.30 *EJ 5.30 B*EJ 26.50 *EJ 30.20 BJ NS

Nickel 4.00 B 10.60 B 2,140.00 5.10 B 3.70 B 10.20 B 100

Selenium 2.60 B 3.00 B

Silver 0.83 B

50

5.10B NS

Zinc R 308.00 EJ 365.00 EJ 230.00 E R 139.00 E NS

Cyanide 2.10B 0.62 B 200

U)oo00tovo

BJE*

NSR

Blank spaces indicate results were found below contaminant laboratory detection limits.Reported value was obtained from a reading that was less than the CRDL but greater than or equal to the IDL.Estimated data due to exceeded quality control criteria.Compound concentration exceeds the calibration range of the GC/MS instrument for that specific analysis.Duplicate analysis not within control limits.Denotes no standard applies.Value rejected during validation

CDIwl Federal Programs Corporation



Compound/Analyte (|ag/l) MW-1 MW-2 MVV-3 MW-4 MW-5 MW-6 MW-7 (Dup. ofMW-3)

MCL


Semi- Volatile Organic Compounds

Inorganic Analytes

Aluminum

Arsenic

Barium

Cadmium

Chromium

Copper

Iron

Lead

Manganese

Nickel

Silver

Zinc

Cyanide

80.50 B

3.20 B

38.00 B

l.OOB

0.81 B

32.10*J

79.80 B

R

10.90B

1.50B

31.00

80.30 B

4.60 B

104.00 B 44.30 B

13.00 J

1.70 B 3.10 B

1.50 B*J R

1 34.00 J 57.20 B

R R

178.00 B 279.00 B

4.60 B

26.60 R

82.40 B

30.20 B

1.50B

16.10

40.00 *J

178.00 J

R

14.60 B

11.80B

38.00

4.30 B

98.00 B 1 14.00 B

50.80 B 21.10B 36.80 B

3. SOB 2.00 B

3.60 B 2.90 B 1.70B

R 65.90 *J R

108.00 54.70 B 67.90 B

R R R

25.30 22.20 143.00 J

2.40 B 3.00 B 1.90B

R 49.10 R

NS

50

2,000

5

100

NS

NS

15

NS

100

NS

NS

200

cooo0000o




Blank spaces indicate results were found below contaminant laboratory detection limits.B Reported value was obtained from a reading that was less than the CRDL but greater than or equal to the IDL.J Estimated data due to exceeded quality control criteria.E Compound concentration exceeds the calibration range of the GC/MS instrument for that specific analysis.* Duplicate analysis not within control limits.NS Denotes no standard applies.R Value rejected during validation

U)ooCOU)H




Compound/A nalyte (|ig/l)


Acetone

Inorganic Analytes

Aluminum

Antimony

Arsenic

Barium

Chromium

Copper

Iron

Lead

Manganese

Nickel

Zinc

MW-1 MW-2 MW-3

1,010.00 2,250.00 147 .00 B

3.80 B

43.60 B 79.30 B 30.10B

R 121.00 *J

18.20 B 7.20 B 6.20 B

1,580.00 2,470.00 1,560.00

4.20 J 3.00 J 5.00 J

48.40 76.10 111.00

82.70

490.00 J 107.00 J 225.00 J

MVV-4 MW-5 MW-6

23.50 B 1130.00

40.00 B

3.00 B

22.10 B 51.00 B 35.60 B

R

10.10B

256.00 1,730.00

R 2.2 BJ 4.70 J

7.80 B 41.90J

4.20 B 29.80 J 59.80 J

MW-7 (Dup. ofMW-6)

16.00J

1,120.00

1.20B

33. SOB

R

6.20 B

1,620.00

5.10J

41.20

65.30 J

MCL

NS

NS

6

50

2,000

100

NS

NS

15

NS

100

NS

oo00u>to CDIwl Federal Programs Corporation

Table 4-5Results of Round 3 Ground water Monitoring Well Sampling


Blank spaces indicate results were found below contaminant laboratory detection limits.Indicates no sample was taken.

B Reported value was obtained from a reading that was less than the CRDL but greater than or equal to the IDL.J Estimated data due to exceeded quality control criteria.E Compound concentration exceeds the calibration range of the GC/MS instrument for that specific analysis.* Duplicate analysis not within control limits.NS Denotes no standard applies.R Value rejected during validation.

u>oo00U)U)




Compound/A nalyte (fig/1)

Inorganic Analytes

Aluminum

Arsenic

Barium

Chromium

Copper

Iron

Lead

Manganese

Nickel

Selenium

Zinc

MW-1

1, 250.00 E*J

6.70 B

46.30 B

9.30 B

8.00 B

955.00

3.50

24.90

2.50 B

71.20J

MW-2

14,600.00 E*J

8.70 B

109.00 B

35.60

12.40 B

6,890.00

2.70 B

130.00

42.40 BJ

3.70 B

1 54.00 J

MW-3

693.00 E*J

21.90 B

6.90 B

458.00

2.60 B

26.80

2.40 BJ

94.40 J

MW-4

809.00 E*J

1.50 B

24.90 B

6.90 B

706.00

4.90

19.00

42.50 B

3.50 B

90.40 J

MW-5 MW-6

200.00 BE*J 1 850.00 E*J

1.90B

53.30 B 18.80B

13.90

9.10 B

152.00 1,030.00

1.3B 6.90

7.10B 14.90 B

42.50 BJ

2.50 BJ

1 14.00 J 150.00 J

MW-7 (Dup. ofMW-6)

1, 650.00 E*J

19.70 B

6.90 B

4.50 B

889.00

5.70

13.70 B

141.00 J

MCL

NS

50

2,000

100

NS

NS

15

NS

100

50

NS

u>ooCOU)

Blank spaces indicate results were found below contaminant laboratory detection limits.B Reported value was obtained from a reading that was less than the CRDL but greater than or equal to the IDL.J Estimated data due to exceeded quality control criteria.E Compound concentration exceeds the calibration range of the GC/MS instrument for that specific analysis.* Duplicate analysis not within control limits.NS Denotes no standard applies.R Value rejected during validation.


Table 4-7Sampling Results from Off-Site Private and Municipal Supply Wells


Compound/Analyte (u.g/1) WAN-2 WAN-3 WADP WA



Bis (2-ethylhexyl)phthalate 1 .00 J 2.00 J

Pesticides/PCBs

IF WARRZ WDD WAN-4 (Dup. MCLof WAN-3)

l.OOJ 3.00 J NS

Heptachlor Epoxide 0.01 J NS

Dieldrin 0.03 J 0.14 0.07 0.01 J 0.4

Endrin Ketone 0.01 J 2

Inorganic Analytes

Aluminum 25.90B NS

Barium 14.70 B 10.80 B 17.10B 13.10 B 13.10B 13.70 B 11.20B 2,000

Copper 10.90B 10.90B 4.50 B 6.30 B 27.80 1,300

Iron 110.00 21.20 B 25.50 B NS

Lead 3.40 8.30 2.90 B 2.00 B 3.40 9.50 15

Manganese 1 .40 B

Vanadium

NS

3.80 B NS

Zinc 6.00 B 5.80 B 173.00 6.70 B 4.80 B 19.60 B 8.80 B NS

U)oo00


Table 4-7Sampling Results from Off-Site Private and Municipal Supply Wells


Notes:Blank spaces indicate results were found below contaminant laboratory detection limits.

B Reported value was obtained from a reading that was less than the Contract Required DetectionLimit (CRDL) but greater than or equal to the Instrument Detection Limit (IDL).

J Estimated data due to exceeded quality control criteria.NS Denotes no standard applies.

U)oooo


U»OO00U)

Table 4-8Sampling Results from Off-Site Spring/Seeps

Compared Against National Recommended Water Quality Criteria'1'Remedial Investigation, V&M/Albaladejo Farms Site, Vega Baja, Puerto Rico

Page 1 of 2

Compound/Analyte (u.g/1) SPRING- 1 SPRING-212/03/97 12/03/97


SPRING- 1 CMC CCC05/21/98


Pesticides/PCBs

Inorganic Analytes

Aluminum (a) 271.00 26.80 B

Barium 19.60B 20.00

Iron 381.00 51.70B

Copper

Lead 1.5 B 1.00 B

Manganese 11.90B 3.30 B

Zinc 4.60 B

272.00 750 (b) 87 (b)

19.90 B NS NS

7 19.00 J NS 1,000

5 OORf * **-)-UUDJ (c)(d)(e) (c)(d)(e)

R 65 2.5

6.10B NS NS

~l AC\ R *** ****'•^UB (c)(d)(e) (c)(d)(e)

Notes:CMC USEPA Surface Water Quality Criteria: Maximum ConcentrationCCC USEPA Surface Water Quality Criteria: Continuous Concentration(1) National Recommended Water Quality Criteria- Correction (Revised April, 1999). EPA 822-Z-99-001(a) Criteria are pH dependent: values apply where pH is between 6.5 and 9.0. pH measured in the field immediately prior to spring/seep sampling ranged

between 6.70 and 8.28.(b) This value is based on a Section 304(a) aquatic criterion that was derived using the 1985 Guidelines (Guidelines for Deriving Numerical National Water

Quality Criteria for the Protection of Aquatic Organisms and Their Uses. PB85-227049, January 1985) and was issued in the document: Aluminum(EPA 440/5-86-008).

CDIvl Federal Programs Corporation

Table 4-8Sampling Results from Off-Site Spring/Seeps

Compared Against National Recommended Water Quality Criteria(1)


(c) This value is expressed in terms of total recoverable metal in the water column.(d) Criteria for metals are expressed in terms of the dissolved metal in the water column. The recommended water quality criteria value was calculated using

the Section 304(a) aquatic life criteria expressed in terms of total recoverable metal, and multiplying it by a conversion factor (CF). The termConversion Factor represents the recommended conversion factor for converting a metal criterion expressed as the total recoverable fraction in the watercolumn to a criterion expressed as the dissolved fraction in the water column.

(e) The criterion for this metal is expressed as a function of hardness (mg/1) in the water column. Criteria values for sample hardness may be calculatedfrom the following: CMC (dissolved) - exp{mA [In(hardness)] + bA} (CF), or CCC (dissolved) = explrr^ [In(hardness)] + bc) (CF) and the parametersspecified in Appendix B of National Recommended Water Quality Criteria- Correction (Revised April, 1999). EPA 822-Z-99-001

(f) This recommended criterion is based on Section 304(a) of the Clean Water Act aquatic life criterion that was issued in the 7995 Updates: Water QualityCriteria for the Protection of Aquatic Life in Ambient Water, (EPA-820-B-96-001, September 1996).

* For sample SPRING-1 (05/21/98): CMC0'1'1" = 25.5133 |ig/l** For sample SPRING-1 (05/21/98): CCCcopp" = 16.0771 [Ig/l*** For sample SPRING-2 (12/03/97: CMC1"* = 284.0956 Jig/1; and sample SPRING-1 (05/21/98): CMC1*"* = 201.0333 |ig/l**** For sample SPRING-2 (12/03/97: CCC1^ = 286.4195 Ug/1; and sample SPRING-1 (05/21/98): CCC^ = 202.6777 Jig/1B Reported value was obtained from a reading that was less than the Contract Required Detection Limit (CRDL) but greater than or equal to the

Instrument Detection Limit (IDL).J Estimated data due to exceeded quality control criteria.NS Denotes no standard applies.R Value rejected during validation.

Indicates no sample was takenBlank spaces indicate results were found below contaminant laboratory detection limits.

Values in bold indicate exceedance of screening criteria

U>oo00w00


10oo00u>VJD

Table 5-1Fate and Transport Properties for Site Contaminants

Remedial Investigation, V&M/Albaladejo Farms Site, Vega Baja. Puerto Rico

CONTAMINANT

FAL Inorganics

Arsenic (+3)BariumBerylliumCadmiumChromium (+6)CobaltCopperronead

ManganeseMercuryNickelSeleniumSilverThalliumZinc

Molec.Weight

(9/mole)

SpecificDensity920-25° C

751379

1125259645620755201597910820465

WaterSolubilitya 20-25° C(mg/l)"

4 735 Decomposes

1.82 Insoluble8.65 li

7.1

11.3472

13.55

4.26 li105

11.857.14

InsolubleInsolubleInsoluble89l i

8 92 Insoluble7.03 Insoluble

InsolubleDecomposesInsoluble

8.9 InsolubleInsolubleInsolubleInsolubleInsoluble

VaporPressure

« 20-25° C(mm HG)

000200000

Henry's LawConstant

« 20-25° C(atm-m 'Xa/mol)

NA

NANA

Koc

(cc/gm)

NA

NA

322NA

logKow

NA

NANA

VARIABLES

Fraction Organic Carbon, ta 0.03Soil Bulk Density, Rho_b = 1.57 gm/ccEffective Porosity, Eta_e - 0.1

Adsorption is "Low""High""Moderate""Immobile"

Volatilization from Water is "Low""High'"Moderate"

Kd

(cc/gm)

305

1000001600

15

25000

1807929

876300

Rf Adsorption

472 High250 High

5000000 High80000 High236 5 High

1300000 High

2827 High1241.3 High

150 HighLow

4400 High320000 High

Volatilizationfrom Water

LowNA

NANA

Mobility

ModerateModerateLowLowModerateHighLow

LowLowModerateHighLowLow

Estimate until verified

0.52

ifKd<if Kd>if Kd is in-betweenif Kd >10if H < 0.0000001if H > 0 001if H Is in-between

Mobility is •High""Low""Moderate"

if Rf <i(Rf>if Rf is in-between

101000

NOTATION

Koc - Soil Organic Carbon/Water Partition Coefficient, cc/gmKow - n-Octanol/Water Partition Coefficient, dimensionlessKd = Soil/Water Partition Coefficient [» Koc X foe for organics], cc/gmRf = Retardation Factor = 1 + (Rho_b X Kd / Eta_e). dimensionlessNA= Data is not available

NOTES

The Kd values for inorganics are based information provided in the EPA Soil Screening Guidance Document (EPA, 1994).The Kd values for mercury, and nickel were developed by EPA using an equilibriumgeochemical speciation model (MINTEO2). assuming a certain pore-water chemistry.The values for arsenic, and chromium (6-t), were based on empirical, pH-dependent relationshipsdeveloped by EPA. The Kd values used here were adjusted for a site specific pH of 7.6.However, for these values to be more site-specific, site-specific modeling would be required because, unlikefor organics, Kd values tor inorganics are significantly affected by a variety of soil conditions• For inorganics, solubility is based on "per 100 parts," i.e., units are |mg/(1 OE-04 I)]

Sources: 1 - Fate and Exposure Data by Howard. Philip H, Lewis Publishers2 Groundwaler Chemicals Desk Reference by John H. Montgomery and Linda M. Welko. Lewis Publishers3 - Merck index, 11th Edition, Merck & Co. Inc., Rahway, N.J., 19694 - Dangerous Properties of Industrial Materials5 - USEPA Superfund Public Health Evaluation Manual, OSWER Directive 9285.4-1; October, 19866 - Koc value for Aniline. Soil Science Journal. 1986. Citation 141:26; Bouchard. D; Mattice.J ; Lavy. T.L.7 - Solubility of 2-Mercaptobenzothiazole. EPA-560/2-76-006. Washington DC: US EPA. PP160. 1976 Investigation of selected potential environmental contaminants:

Mercaptobenzolhiazoles Santodonato, J . Davis.L N ;Howard.P.H.;Saxena,J.8 • Henry's Law value for Aniline: Syracuse Research Corporation. 19889 • Balelle, 19B9 ___________________________________________________________________________________


Table 5-2Relative Mobilities of Site Inorganic Contaminants


HIGH

Antimony

Calcium

Magnesium

Nickel

Potassium

Selenium

Sodium

Vanadium

MEDIUM

Aluminum

Arsenic

Barium

Beryllium

Cadmium

Iron

Manganese

Silver

LOW

Copper

Lead

Zinc


300840

67' 15 67' 00' 66" 45' 66' 30'

18' 30' -

18' 15'

18'00'

17" 45'

66' 15'

ATLANTIC OCEAN

66'00' 65- 45' 65' 30'

V&M SITE

65' 15'

Cutatxa

——"^ / \ ( OioeoviB\ I J»yuyt 1 }

Ad|unla» VV^~V \f^~~\——

CARIBBEAN SEAPUERTO RICO

I10 20 30 KILOMETERS

10 20 30 MILES

COM FEDERAL PROGRAMS CORPORATIONa subsidiary of Camp Dresser & IfeKee Inc.

Figure 1-1

LOCATION OF V&M/ALBALADEJO FARMS SITE

V&M Albaladejo Site, Puerto Rico 160 KM 4.2La Raiza 1 Sector Almirante Norte Ward

CiXJOHANNl L-VIMX FIG1-Z 04/25/97 Bi24i46 !i45i04 COM Federal Program. COM Fedw

SUSPECTED BURNED AREA-

XARST HILL

BURNED AREA HI-REMOVAL ZONE 2

DIRT ROAD

REMOVAL ZONE 1A-

KARST HILL

-DIRT ROAD-BURNED AREA IVREMOVAL ZONE 1

KARST HILL

BURNED AREA IIREMOVAL ZONE 4

NOT TO SCALE

KARST HILL

ZoneS

SUSPECTEDBURNED AREA-

KARST HILL

REMOVALZONE 3

FIELD

DIRT ROAD-

KARST HILL

-ENTRANCE

ASPHALTROAD-

FELD

-BURNED AREA !

KARSJ HILL

LEGEND;

SINKHOLELAND OWNERSHIPPABLO EOUIA FARM

VICTOR MARRERORAFAEL RAMIREZISRAEL VEGA

JUSTO SUAREZ

-ASPHALTROAD

300842

CDM FEDERAL PROGRAMS CORPORATIONa subsidiary of Camp Dresser & McKee Inc.

Figure 1-2

SITE MAP - V ic M/ALBALADEJO FARMS SITE

V & M Albaladejo Site. Puerto Rico 160 KM 4.2La Raiza 1 Sector Almirante Norte Ward

f J

K A U S T I I I L I .

ASPHALT ItOAl)

K A U S T M I L L

/ . ( INK '\K A K S T 1 1 1 1 , 1 ,

D I R T K O A I )SUSPKCTIf . l )FUIKN A HP!

Source: Roy F. Weslon, 1997

NOT TO SCALE

300843

CDM FEDERAL PROGRAMS CORPORATIONa subsidiary of Camp Dresser & McKee Inc.

Figure 1-3

SCHEMATIC SITE MAP SHOWING BURN AREA NOMENCLATUREUSED FOR THE REMOVAL ACTION REPORTS

V Sc M Albaladejo Site. Puerto Rico 160 KM 4.2La Raiza 1 Sector Almirante Norte Ward

'•i'l

1.5 inches = 500 feetContour Interval = 5 meters

Lines of Geological Sections:A - A ' (Figure 3-6)B - G' (Figure 3-7)

Contour Interval in Meters Above Mean Sea Level. - ' I • , • \ • ,sxxx~.';/••'

CDM FEDERAL PROGRAMS CORPORATIONa subsidiary of Camp Dresser k 300844

FIGURE 2-1

WELL LOCATION MAP

& M ALBALABEJO NORTE SITEWORK ASSIGNMENT 7720-086

BURN/SOIL REMOVAL

I

FIGURE 2-2300845

CDM FEDERAL PROGRAMS CORPORATIONMONITORING WELL LOCATIONS

AND BURN AREA/SOIL REMOVAL ACTION ZONESV & M/Albaladejo Farms Site

VegaBaja. Puerto Rico

VENTED STEEL CAPWITH PADLOCK

oaLU•>UJo

LJ<

CT)Oooinai

roIT)o

en

ino

(ftOo

UJ

NOTE:ALL LENGTHS ARE APPROXIMATEAND ARE TO BE USED FORCOSTING PURPOSES ONLV.ESTIMATED DEPTH 150'

10-INCH INSIDE DIAMETERPROTECTIVE SURFACE CASING

PEA GRAVEL

CONCRETE COLLAR - CONTINUOUSPOUR CONCRETE SURFACE SEAL ANDWELL APRON (EXPAND NG CEMENT)

12" BOREHOLE

CEMENT/BENTONITE GROUT

8-iNCH OUTER DIAMETERSTEEL OUTER CASING

4 — NCH INSIDE DIAMETERSCHEDULE 40 PVC CASING

BASE OF OUTER CASING

BENTONITE SEAL

8-INCH DIAMETER BOREHOLE

CLEAN MORIE #1 SAND FILTERPACK EXTENDING 2-3' FEE~ABOVE SCREEN

4-INCH INNER DIAMETER0.02-INCH SLOT SIZEPVC WELL SCREEN

(NOT TO SCALE)

V & M SITEVEGA 3AUA, PUERTO RICO

WORK ASSIGNMENT OS6-2CCPW

L'UM KKlJKK/LL CUKJ'UkAllUN

Figure 2-3Scher",ctic Dicqran^

, p. :-T0r tSeOrOCK

Monitorinc Wel lsWith Overburden

300846

\ -»vo • • " - ..*'» v-, (a _ - -F •••"^^-^"'rfc ='»< - 'i' xVj' aifc--.''.. • *'--SS fiii/Cerro? *'C

pWARRZ-u n. »>i - A-

RI WELLCODE

Residential Well:

Dieizo Davila - (Backcroundl

AgriculturaL/'lndustrial Wells

Agro-Industri Frescura

Aristides del Po/,o

W A I F

WADP

SCALE 1:20000

'.OOC 1000 20CO 3000 400C 5000 6000 7000 FEE" Nj

! K I L O M E T E R

Contour Interval 5 Meters-^ -=-- —

300847

CDM FEDERAL PROGRAMS CORPORATION

Figure 2-4LOCATION OF PRIVATE AND MUNICIPAL WELLS

WITHIN A 1.5-MILE RADIUS OF THE SITEV <k M Albaiodejo Site, Puerto Rico 160 KM 4.2

La Raiza 1 Sector Almircnte Norte Wara

Contour Interval 5 Meters

Figure 2-5

LOCATION OF SPRING/SEEPS SAMPLED ALONG THE RIO INDIC

CDM FEDERAL PROGRAMS CORPORATION• ral»MUr7 of Camp PT«II«- *

V if M Albaladejo Site, Puerto Rico 160 KM 4.2300848 La Raiza 1 Sector Almirante Norte Ward

( QUAD ) MANATI. P.R. Sourct MRS Document. 19%

300849CDM FEDERAL PROGRAMS CORPORATION

of

Figure 3-1

REGIONAL TOPOGRAPHIC MAP SHOWING SITE

V <!c M Albotodejo Site, Puerto Rico 160 KM 4.2La Raiza 1 Sector AJmirante Norte Ward

100

90

80

70

60u,t/5

£ 50M)0)Q

40

30

20

U)o 10o00in

0

-*— -~~~~* — — *r" ^ * *~~~~~~ *~— —» % „ *. -x *

A A v'' v'' *^__— — — ' ^ A ~ — — — . — __ . ^ *

4 ————— >—- ——— •-- "^^

Xx - • "x

'

I

x/

XX '

•v Iv I

V ^

X . - -A

• High (F°)—— • —— Low(F°)

• *X" Precip.

1 ' . , [ ' ! , !

7

6

5

4C/5a>uC

HH

3

2

1

0

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec

MonthFigure 3-2

^9fiSS^^^W^ AVERAGE MONTHLY TEMPERATURES AND PRECIPITATIONCOM FEDERAL PROGRAMS CORPORATION v & M Aibaiadejo site. Puerto Rico ieo KM 42a subsidiary of Camp Dresser & UcKee Inc. La Raiza 1 Sector Almirante Norte Ward

18'30

25

20

66 25 20 15' 10'

ATLANTIC OCEAN

EXPLANATION

Adapted from USGS (1996)

0 1 2 3 4 KIIOMEIERS\ ' , ' -V- l , !

0 1 2 3 4 MILES

DRAINAGE DIVIDE THAT LIMITSBOUNDARY OK AREA

PEHENNIA1 STF-ihAM

TOWN OR CITY

V&M SITE

BEACH DbPO ilTS

SWAMP DEPC SITS

ALLUVIAL DEPOSITS

lANDSUDb 05POSIIS

BIANKET DEI-OSI1S

CAMUY FORMATION

AYMAMON LMbSlONb

AGUAIJA IIMIfSTONE

CIBAO (-DURATION

I AHES LJMbSIONE

SAN SEBASTIAN FORMATION

PLUIONIC ROCKS

VOLCANIC AMDVOLCANICIASTICROCKS

Holocuiieand

OUATbHNAOY

QUAILHNAHYILFUIARY

Mioceot;aiul

Oligucunt:

I t .MIIARY

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Figure 3-3GENERALIZED SURFICIAL GEOLOGY OFTHE VEGA-BAJA REGION, PUERTO RICO

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Figure 3-4

STRAT1GRAPHIC COLUMN OF MIDDLE TERTIARY AGENORTH COAST LIMESTONES

V ic M Albaladojo Site. Puerto Rico 160 KM 4.2La Raiza 1 Sector AJmirante Norte Ward

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Figure 3-5

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GEOLOGICAL CROSS-SECTION B-B'ACROSS THE \?&M SITE

V&M/Albaladejo farmsVega Baja, Puerto Rico

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Figure 3-8

REGIONAL GROUNDWATER FLOW DIRECTION IN VICINITY OF SITE

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Figure 3-9

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V At M Albolodejo Site, Puerto Rico 160 KM 42Lo Roizo 1 Sector Almirante Norte Ward

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SITE POTENTIOMETRIC SURFACE CONTOUR MAP

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APPENDIX ADEVIATIONS TO THE FINAL WORK PLAN

300861

DEVIATIONS TO THE FINAL WORK PLAN

A.I MONITORING WELL INSTALLATION AND CORING

Deviations from the Work Plan The monitoring wells were installed as proposed in the Final WorkPlan (CDM Federal, 1997a); however, the following deviations were noted:

• MW-2 was the only monitoring well location that was substantially changed from that shownin the Final Work Plan. The purposed location of the well was directly north of the centralsinkhole in Zone 3. Due to access constraints, the well was installed directly south of thecentral sinkhole in Zone 3 (refer to Figure 1-3).

• The Work Plan indicated that each well would be drilled to twenty feet below the water table,if installed during the dry season. The Work Plan also stated that if the wells could not beinstalled during the dry season for logistical reasons (for example, if the removal action hadnot been completed by the end of the dry season), then the tops of well screens would be setat least 20 feet below the water table. Although the wells were installed during the dryseason, the V&M Site experienced unseasonably high meteoric precipitation in December1997 and January 1998, as reported by the EPA soil contractor. The on-site Geologist, inconcurrence with the CDM Federal Project Manager, installed the tops of well screens about20 feet below the water table.

• The Work Plan indicated that the water table depth is anticipated to vary across the site from50 to 100 feet below ground surface (bgs). Instead, depth to water ranged from 85 to 175 feetbgs across the site. The deeper water table depth resulted in additional drilling and wellinstallation completion footage.

• The Work Plan stated that up to four contingency soil samples would be retained and storedin glass jars from each boring for possible future analysis of physical characteristics. Actualsite conditions revealed that the thickness of the unconsolidated soils was greater than thatassumed in the Work Plan. As a result, 8 to 27 soil samples from each soil boring werearchived at the site awaiting groundwater analytical results.

• The Work Plan indicated that contingency soil samples were to be analyzed at the site for In-Place Density (ASTM D-2922, D3017, and D 854) and Redox Potential (SW-816 Method9045B Modified). As directed by the CDM Federal Project Manager, these tests were notperformed in the field. Total Organic Carbon (TOC) was also deleted from the list of fieldanalyses because the sample holding time was exceeded (because the soil samples had beenarchived at the site awaiting groundwater analytical results).

• The Work Plan stated that pH of soils would be determined using method ASTM D-4972.During the field investigation, pH of soil was determined using pH sensitive paper (MethodB). Deviations from the method include: 1) using pH paper sensitive to the nearest 0.5 pH

300862

units; 2) not air drying the soil prior to testing; and 3) deleting calcium chloride solution pHtesting.

• The Work Plan indicated that a well plumbness test would be conducted on each well todetermine if a correction factor would have to be applied to water level readings due to adeviation in plumbness. As directed by the CDM Federal Project Manager, no wellplumbness or inclinometer tests were conducted at the site.

A.2 WELL SURVEY

Deviations from Work Plan The well survey was performed as proposed in the Final Work Plan(CDM Federal, 1997a) and the CDM Federal surveyor's SOW.

A.3 GEOPHYSICAL BOREHOLE LOGGING

Deviations from the Work Plan Geophysical logging procedures were followed as detailed in theFinal POP. All six monitoring well boreholes were logged using the 3-arm caliper. However,logging data for three well logs (MW-1, MW-5, and MW-6) were lost during the electronic transferfrom the logging tool to the portable on-site computer. The information was not recoverable and, asa result, no borehole shape is available for these boreholes.

A.4 ON-SITE GROUNDWATER SAMPLING

Deviations from the Work Plan The monitoring wells were sampled as proposed in the RI/FSWork Plan (Rounds 1 & 2) and as outlined in a later verbal agreement with the EPA RPM (Rounds3 & 4). Analytical results from the first two rounds proved to be inconclusive and the followingdeviations occurred:

• Due to mechanical difficulties with the submersible pump and convert control box, only threeof six monitoring wells sampled during the Round 1 sampling event utilized the low-flowpurging and sampling technique. Monitoring wells MW-3 and MW-4, were purged using adecontaminated 3-inch diameter bailer and sampled using disposable Teflon bailers. Adecontaminated Redi-Flo II groundwater submersible pump was used to purge monitoringwell MW-6. A disposable Teflon bailer was used to sample the well.

• During Round 1, the low-flow purging and sampling technique was used to purge and sampleMW-1, -2, and -5. An initial water level drop occurred immediately followingcommencement of purging. The drop in water level was unavoidable due the energy requiredfor the pump to overcome the atmospheric pressure and head created by over 80 feet of water.This water level drop occurred within the first few minutes of pumping. However, followingthe initial water level drop, water levels stabilized as recommended by the method.

• Only one field blank was collected during the Round 1 groundwater sampling event.According to Final POP (CDM Federal, 1997b), Section 6.1.3, one field blank would be

300863

collected for each equipment type per decontamination event. Disposable bailers had beenused to collected groundwater samples for MW-3, -4, and -6, and no field blanks werecollected with the disposable bailers.

• The field blank in Round 1 consisted of DI water and not analyte-free water.

• VOCs were not received at 4°C at PDF for Round 2.

The sampling method used for Round 3 was conducted as per a verbal agreement with the EPA RPMin an attempt to collect valid data. To ensure the validation of the sampling results during Round 3,a decontaminated Redi-Flo II groundwater submersible pump was used to purge each monitoringwell. Three well volumes of water were purged prior to sampling with dedicated bailers. However,the project team was curious to see if contaminants, lead in particular, would be detected in anotherpump field blank at the V&M Site during Round 3. So the MW-4 sample was collected with a pumpper the approved Final POP. A field blank was collected through the pump. All sample lead resultscollected with bailers were declared valid by EPA data validators. However, the field blankassociated with the pump again had detections of lead, resulting in the rejection of lead results in theMW-4 sample.

All of the Round 4 samples were collected with dedicated bailers to reduce the chances of samplecross contamination. All of the Round 4 results were declared valid by EPA data validators.

Round 2 water samples were submitted to the CLP laboratory with a Chain-of-Custody requestinganalysis for pesticides/PCBs although the samples had been booked for semi-volatile compoundanalysis; according to a telephone request by the COM Federal Project Manager to the CLP lab, thesamples were analyzed for acid-base neutrals only. As such, there were no analytical data forpesticides/PCBs from Round 2.

Neither pesticides nor PCBs were identified as COPCs at the V&M site. With approval from theEPA RPM, it was determined that no further testing of groundwater for pesticides/PCBs wasnecessary in on-site wells during sampling Rounds 3 or 4.

A.5 SYNOPTIC WATER LEVEL MEASUREMENTS

Deviations from the Work Plan All synoptic water level measurement procedures were followedas detailed in the Final POP (CDM Federal, 1997b).

A.6 CONTINUOUS WATER LEVEL MEASUREMENTS

Deviations from the Work Plan All water level measurement procedures were followed as detailedin the Final POP. The Work Plan indicated that all six of the newly installed RI monitoring wellswould be monitored for two weeks.

300864

• Only four of the six wells could be monitored due to difficulties in receiving the probes at thesite in a timely manner. As only four of the six monitoring wells could be monitored, thewells were monitored for 20 days. The lengthened continuous monitoring period (20 daysvs. 14 days proposed in the POP) was the time available between monitoring welldevelopment and completion, and the first groundwater sampling event.

A.9 SPRING/SEEP SURVEY

Deviations from the Work Plan The spring/seep survey was conducted as detailed in the POP.However, the Work Plan had indicated that potentially five springs/seeps would be identified.Instead, only two springs/seeps were identified. The reduced number of flowjng springs/seepsavailable for sampling was possibly the result of low flow conditions occurring during the fieldreconnaissance survey period and lack of a rain event.

A.10 SPRING/SEEP SAMPLING

Deviations from the Work Plan Spring/seep sampling was conducted as proposed in the WorkPlan. However, the Work Plan indicated that five springs/seeps potentially would be identified andsampled before, during, and after a rain event. Instead, only two springs/seeps were identified thathad sufficient flow to sample. The reduced number of springs/seeps sampled and the lower totalnumber of samples taken was due to the low flow conditions occurring during the fieldreconnaissance survey and lack of a rain event.

The Work Plan stated that spring/seep sampling of the Rio Indio was a contingency event that wouldonly occur if on-site groundwater was found to be contaminated or if vadose zone modeling indicateda high probability that contaminants had leached to groundwater. Spring/seep samples were collectedwithout knowledge of the on-site groundwater analytical results and any vadose zone modelinginterpretations. After discussions between the EPA's RPM and CDM Federal's WAM, the decisionwas made to sample spring/seep samples during the spring/seep reconnaissance survey.

A second attempt to sample the springs/seeps was conducted on March 31, 1998 during the firstround of groundwater sampling. Unfortunately, no water was available to sample from thepreviously-identified springs/seeps. During a third attempt to sample the spring/seeps, onespring/seep sample was collected during the second round of on-site groundwater samplingconducted on May 21, 1998.

It was decided that further sampling of the spring/seeps during field events three and four was notnecessary if the spring/seep sampling results did not detect elevated levels of contamination (referto Section 4.4 for analytical results).

A.11 OFF-SITE GROUNDWATER SAMPLING

Deviations from the Work Plan Off-site groundwater sampling was conducted as proposed in theWork Plan.

300865

APPENDIX B

FIELD XRF SAMPLING RESULTSTIME-CRITICAL SOIL REMOVAL ACTION

FEBRUARY 2000 SURFACE SOIL SAMPLING RESULTS

MAY 2000 SURFACE SOIL SAMPLING RESULTS

300866

ANOMALOUSLY-ELEVATED FIELD XRF SAMPLING RESULTS FROM TIME-CRITICAL SOIL REMOVAL ACTION

Remedial Investigation, V&M/Albaladejo Farms Site,Vega Baja, Puerto Rico

SITE DESCRIPTION AND HISTORY

The V&M Site is located off State Road No. 160, Kilometer 4.2 in the Almirante Norte Ward of themunicipality of Vega Baja, Puerto. It is accessed via a dirt road that extends about 1 mile west fromRt. 160. The area is rural and characterized by rugged, heavily-vegetated hilly terrain with smallfarms located in the valleys. The region is sparsely populated with fewer than one hundred residentsestimated to live within one-quarter mile of the site.

The site is located in the limestone uplands of north-central Puerto Rico. This area is characterizedby the distinctive landforms typical of karst terrain, which commonly forms in limestone. Classickarst features include steep hills surrounded by small steep-sided valleys, sinkholes, subsurfacechannels and caves. The surficial alluvium and sand deposits, along with the limestone formations,constitute the unconfined aquifer which supplies most of the water in this region. Water in thelimestone flows through fractures and solution channels. Potentially, the sinkholes provide a directconnection from the surface to the ground water.

Review of historical records and aerial photographs indicate the site was a mostly forested tract ofland that consisted of two properties that were used for rough pasture and farming. Commencingfrom an unknown date, the site was used for the illegal dumping of plastic-coated electric cables,electrical equipment, and car batteries. The wastes were subsequently burned to recover the copper,aluminum and lead. No system to contain the burned wastes. The total quantity of waste disposedand burned at the site is unknown. Four historical waste disposal/burn areas have been identified:

• Zone 1, located on the extreme western portion of the site, was a 3,000 square foot area thatcuts directly into the hillside at the end of a vehicular path.

• Zone 2 was a mounded area, generally about one to two feet above the local grade, with somemounds as high as four to five feet above grade. It covered an area of approximately 2,000square feet and is located north of Zone 1.

• Zone 3 was located in heavily vegetated area within the large north-south trending sinkholedepression that occupies the center of the site. Two small sinkholes are located within thedepression. Two burn areas were located in Zone 3. One of the burn areas was within oneof the sinkholes.

• Zone 4, located east of Zone 1, was a cleared area of approximately 4,000 square feet.Historical aerial photographs (EPA. 1997) indicate that hillside east of Zone 4 has been tilledin the past. Contamination may have been introduced to deeper levels by the tilling.

I o f 2

300867

In March, 1996 based on the results of several sampling events, the EPA Removal Action Branch,Technical Support Section, initiated a sampling event to support the excavation of contaminated soilsand the on-site staging and possible fixation of these soils. Soil samples were collected from Zones1,2, and 4, and field analyzed for copper and lead using X-ray fluorescence (XRF), to delineate thehorizontal extent of contamination in these areas. Estimates from the sampling event suggested thatthere was at least 1,800 cubic yards of contaminated soil directly beneath the burn residuals.

In March, 1997, EPA's Removal Action Group performed delineation sampling and characterizedthe burn areas in Zone 3.

TIME-CRITICAL SOIL REMOVAL ACTION

EPA conducted a time-critical soil removal action from January through March, 1998. Based on the1996 and 1997 sampling results, soils were excavated from targeted areas. Confirmatory sampleswere collected after each soil horizon was removed, and analyzed via XRF. Excavation continueduntil analytical results indicated that lead levels were below the site-specific screening level of 500ppm. Contaminated soils were stockpiled and stabilized on-site in a designated area prior to theirremoval and proper disposal.

CDM Federal reviewed the sampling trip report which included clearance testing data and associatedsite location maps for burn zone surface soils (Roy F. Weston, 1999; a copy of which is providedin Attachment I).

Upon review of the trip report, there are nine locations in Zone 4 and one location in Zone 3 whereconfirmatory XRF soil screening results are above the site-specific screening level of 500 ppm.These locations are listed on Table 1 and are highlighted in the sketch maps in Attachment n. Allother contaminated soils within the other burn zones appear to have been identified and removed.

Although there are no confirmatory data indicating that the residual areas of elevated leadcontamination had been removed, the EPA removal group provided CDM Federal a verbal assurancethat all impacted soils were removed.

2 of 2

300868

TABLE 1ELEVATED FIELD XRF SAMPLING RESULTS FROM ON-SITE SOIL SAMPLING DURING REMOVAL ACTION

REMEDIAL INVESTIGATION, V&M/ALBALADEJO FARMS SITE, VEGA BAJA, PUERTO RICO

woo00

February 9, 1998

March 4, 1998

March 16, 1998

4

PELE-4

GS4-81A

GS4-83A

GS4-85A-REP

GS4-87A

GS4-88A

GS4-88A-REP

GS4-92A

GS4-92A-DUP

GS3-19B

548

1,200

1,800

510

560

890

930

1,560

1,140

1,910

p.27

p.36

p.36

p.36

p.36

p.36

p.36

p.36

p.36

p.41

Site-Specific Lead Action Level for Soils Used During XRF-Field Screening was 500 ppmSTART, Roy F. Weston (1999). Sampling Trip Report, V&M/Albaladejo Farms Site, Vega Baja, Puerto Rico, 1999

ATTACHMENT I

300870

SAMPLING TRIP REPORTV&M/ALBALADEJO FARM SITE


Prepared by:

Superfund Technical Assessment and Response TeamRoy F. Weston, Inc./R.E. Sarriera & Associates

Prepared for:

U.S. Environmental Protection AgencyRegion II - Caribbean Environmental Protection Division

San Juan, Puerto Rico 00909

EPA Contract No.: 68-W5-0019Technical Direction Document No.:02- 98-08-0007

PCS# 4040

February 1999

300871

SAMPLING TRIP REPORT

Site Report

Site Name:

TDD No:

DCN No:

Task:

Sampling Dates:

Site Location:

V&M AJbaladejo Farm Site

02-95-0025M

HE 0048 (AL2)

25;8;RV

5 January 1998 through 24 March 1998

Road 160, Km. 4.2AJmirante Norte WardVega Baja, Puerto Rico

Sample Locations: Refer to Figures 1.1 through 6.7

Sample Descriptions: On-site XRF soil sampling

1.0 Background

The V&M/Albaladejo Farm Site is located west of Kilometer Marker 4.2 Road 160, in Vega Baja,Almirante Norte Ward, Puerto Rico. The site is located in a sparsely populated rural area, the nearestresidents are located within one mile of the site. The site consists of an undetermined number of acrescharacterized by rugged terrain. In the past, a small pineapple plantation was in operation on theV&M Farm location.

The contamination at the V&M/Albaladejo Farm Site was the result of previous use as a dump andburn site. Trucks were reportedly observed on the site carrying wastes composed of plastic coatedelectrical cables, electrical equipment, and car batteries. The plastic coating of these wastes wasburned to recover the copper, aluminum and lead. It is unknown when the dump and burn operationsbegan. Waste burning operations on the property continued until 1988.

There were four exposed burn areas on site with green-stained and/or darkened soil. These greenstains were caused by chemical reactions of wastes and sulfuric acid which leaked from car batteries.The burn area also contained exposed remains of electric cables, car batteries, plastic and ashes.During heavy rainfall, run-off from the burn areas drained in the general direction of nearby sink

300872

holes; these sink holes are connected to underground aquifers which serve as a drinking water supplyfor residents on the northwest area of Puerto Rico, through the Puerto Rico Aqueduct SewerAuthority (PRASA). Other than heavily overgrown vegetation, access to the site was unrestricted.

Based on observations made by EPA and START during site visits in 1989 and 1996, it appeared thatthere were four burn areas: Zones 1, 2, 3 and 4. A site visit conducted by EPA and START on 13January, 1997, identified the location of a sinkhole which received run-off water from Burn Area 4.

On 28 January 1997 an additional field survey was conducted on Burn Area 4

From 5 January through 27 January 1998, an additional soil sampling event was conducted in orderto delineate the vertical lead contamination in all the areas of the site .

Excavation to remove contaminated soil began on 26 January 1998 and continued until 24 March1998.

On 28 February 1998, another soil contaminated area was found near Zone 2. Samples from this areawere identified as NA (for new area). The contaminated soil in this area was also removed

2.0 Sampling chronology and description

5 January 1998, EPA, ERCS and START mobilized to the site to begin with the sampling and theremoval actions. START marked all sample points that the Geoprobe subcontractor was going tocollect. The soil core samples were analyzed for lead utilizing the Spectrace 900 XRF spectrometerto delineate the vertical soil contamination at the site.

5 January through 20 January 1998, Geoprobe core samples were collected from each one of thesurface sample points in all zones with surface lead readings above the EPA action level of 500 ppm.As the core samples were collected they were cut in sections to represent the depth of three inches(3"), six inches(6"), nine inches (9"), twelve inches (12") and eighteen inches (18"). The 6" or 12"soil core samples were analyzed first with the XRF, if lead results were below the 500 ppm actionlevel, then the 3" soil core sample was analyzed. If the results were above 500 ppm then the 9"sample was analyzed. This was continued to the 12" or 18" or until results below 500 ppm werefound.

27 January 1998, the EPA-OSC requested grid sampling collection with grid spacing of 25 feet andXRF analysis for clean up confirmation on all zones, where ERCS had completed contaminated soilremoval. Six soil samples identified as S-l, S-2, S-3, S-4, S-5 and S-6 were collected at zone 4 andanalyzed. At the points with results above 500 ppm, ERCS continued excavation. (See Figure 2.1.)

29-30 January 1998, 32 samples were collected at Zone 4 and identified as GS-1 through GS-32.(See Figure \

300873

2-3 February 1998, 26 samples were collected at Zone 4 and identified as GS-33 through GS-58.(See Figure 2.3)

9 February 1998, 4 samples were collected from soil piles around a large size rock in Zone 4 andidentified as Pile 1 through Pile 4. (See Figure 2.9)

10 February 1998, the EPA-OSC requested that the Zone 4 excavation area be re-delineatedaccording to the XRF results of 2 February 1998. The samples of 2 February 1998 with readingsabove 500 ppm were re-analyzed to verify results.

11 February 1998, 13 samples were collected on previously sampled points on Zone 4 with leadresults above 500 ppm. The samples were identified as GS-59 trough GS-71. (See Figure 2 4)

12 February 1998, 6 samples were collected on Zone 4 and identified as GS-72 through GS-77.These samples were analyzed with the XRF three times each to confirm results. 5 previouslycollected samples were submitted to an independent laboratory for confirmation as per the EPA-OSCrequest. (See Figure 2.5)

. , -*•19 February 1998, 4 samples were collected from Zone 6 and identified as GS-61 A, GS-62A, GS-64A and GS-68A. (See Figure 2.6)

21 February 1998, 28 samples were collected from Zone 4 and identified as GS-78 through GS-105.(See Figure 2.7)

24 February 1998, 25 samples were collected from Zone 1A and Zone 1 and identified as GS1A-1through GS1A-9 and GS1-10 through GS1-25. (See Figure 1.1)

2-3-4 March 1998, 3 samples were collected from Zone 1 and identified as, GS1-26, GS 1 -27 andGS1-28 (See Figure 6.2)27 samples were collected from Zone 2 and identified as, GS2-29 through GS2-55. (See Figure 6.2)5 samples were collected from Zone 1 and identified as GS1-15A, GS1-16A, GS1-17A, GS-18Aand GS1-20A. (See Figure 1.2)4 samples were collected on Zone 1A and identified as GS1A-4A, GS1A-5A, GS1A-6A and GS1A-7A. (See Figure 1.2)6 samples were collected from a depression area within Zone 2 and identified as BA2D-1 throughBAD2-6 (See Figure 6.1)9 samples were collected on Zone 4 and identified as GS4-78A, GS4-80A, GS4-81A, GS4-83A,GS4-87A, GS4-88A, GS4-89A, GS4-92A. (See Figure 2.8)7 samples were collected from a new contaminated area found near Zone 2. This area was clasifiedas New Area (NA), and the samples identified as GSNA-1 through GSNA-7. (See Figure 63)4 samples were collected from a depression area within Zone 2 and identified BA2D-7 throughBAD2-10. (See Figure 6.3)

300874

5 March 1998, 5 samples were collected on Zone 2 and identified as GS2-46A, GS2-49A, GS2-52A,GS2-53A and GS2-55A. (See Figure 6.4)I sample was collected at Zone 1 and identified as GS1-18B (See Figure 1.3)

6 March 1998, 10 samples were collected on the New Area and identified as NA2-1 through NA2-10. (See Figure 6.5)

9 March 1998, 16 samples were collected on Zone 2 and identified as GS2-56 through GS2-71.(See Figure 6.6)

10 March 1998, 12 samples were collected on Zone 2 and identified as GS2-72 through GS2-83.(See Figure 6.7)3 samples were collected in the New Area and identified as NA2-5A, NA2-7A, NA2-9A. (See Figure6.7)

II March 1998, 12 samples were collected on Zone 3 and identified as GS3-1 through GS3-12.(See Figure 3.1)

12-13 March 1998, 10 samples were collected on Zone 3 and identified as GS3-13 through GS3-22.(See Figure 3.2)

9 samples were collected on Zone 3 and identified as GS3-1A, GS3-3A, GS3-7A, GS3-10A, GS3-11 A, GS3-12A, GS3-16A, GS3-19A and GS3-22A. (See Figure 3.3)

16 March 1998, 1 sample was collected on Zone 3 and identified as GS3-19B. (See Figure 34)3 samples from Zone 5 and identified as GS5-1, GS5-2 and GS5-3. (See Figure 4.1.)

17 March 1998, 2 samples were collected from Zone 5 and identified as GS5-4, GS5-5. (See Figure4.2)2 samples were collected from Zone 6 and identified as GS6-1 and GS6-2. (See Figure 5 . 1 )

18 March 1998, 1 sample was collected on Zone 6 and identified as GS6-2A. (See Figure 52)

19 March 1998, 2 samples were collected from Zones 5 and identified as GS5-6 and GS5-7 (SeeFigure 4.3.)

20 March 1998, 6 samples were collected from Zones 5 and identified as GS5-8 through GS5-13.(See Figure 4.4.)

23 March 1998, 5 samples were collected from Zone 5 and identified as GS5-14 through GS5-18.(See Figure 4.5.)

24 March 1998, 2 samples were collected from Zones 5 and identified as GS5-17A and GS5-18A.(See Figure 4.6.)

300875

3.0 XRF analysis results

Results of all XRF analysis are detailed on Table 1. These results have been qualified with an U forsample results less than the site detection limit of 97 ppm and with J for sample results between thedetection limit and the site quantitation limit of 271 ppm.

300876

Table 1.

Results of XRF analysis of samples for V and M Albaladejo site

January to March 1998.

KEY TO TABLE

SAMPLE NUMBER - Zx-nnnAB-d: Z - zone (Z) or area (A) where collected, nnn -number which identifies the sample point, A or B -resample at sample point, d - depth in inches for thesample.

DUP - Duplicate SampleREP - Replicate (XRF analysis was repeated)RR - Multile ReplicateU - not detected (detection limit - 92 ppm)J - Between detection limit of 92 ppm and quantitation limit of 217 ppmS - SoilD - DepressionBA - Burn AreaGS - Grid SampleNA - New AreaTS - Top Soil

300877

Left blank in original

300878

SAMPLE NO.

Z4-33A-12

Z4-5A-6

Z4-6C-12

Z4-33A-6 DUP

Z4-33A-6

Z4-33-6

Z4-33-6-DUP

Z4-6B-6

Z4-5-6

Z4-5-6-REP

Z4-4A-6

Z4-5A-11

Z4-5-12

Z4-6B-12

Z4-6C-6

Z4-4A-10

Z4-4A-10-REP

Z4-33-12

Z4-5-3-DUP

Z4-6B-3-DUP

Z4-6B-3

Z4-33A-3

Z4-5A-3

Z4-33-3

Z4-4A-3

DATE

7 January 1998

7 January 1998

7 January 1998

7 January 1998

7 January 1998

7 January 1998

7 January 1998

7 January 1998

7 January 1998

7 January 1 998

7 January 1 998

7 January 1 998

7 January 1998

7 January 1998

7 January 1998

7 January 1998

7 January 1998

7 January 1998

8 January 1998

8 January 1998

8 January 1998

8 January 1998

8 January 1998

8 January 1998

8 January 1998

Pb ppm

u

278

u

u

u

u

u

132J

187J

172J

u

u

u

u

u

181J

214J

u

209J

u

u

262J

2,000

1,720

5,150

300879

Z4-5-3

Z4-33A-4

Z4-6C-3

Z4-5A-3-REP

Z4-4A-3-REP

Z4-6B-12

Z4-33-6-DUP

Z4-6C-12

Z4-33A-6

Z4-33-12

Z4-33A-12

Z4-5-6

Z4-6B-6

Z4-33A-6

Z4-4A-10

Z4-4A-10-REP

Z4-5A-6

Z4-5-12

Z4-4A-6

Z4-5A-11

Z4-33-6

Z4-6C-6

Z4-6C-6-REP

Z4-33A-6-DUP

Z4-6-6

Z4-8-6

8 January 1 998

8 January 1 998

8 January 1998

8 January 1998

8 January 1998

9 January 1998

9 January 1998

9 January 1998

9 January 1998

9 January 1998

9 January 1998

9 January 1998

9 January 1998

9 January 1998

9 January 1998

9 January 1998

9 January 1998

9 January 1998

9 January 1998

9 January 1998

9 January 1998

9 January 1998

9 January 1998

9 January 1998

12 January 1998

12 January 1998

317

u

256J

1,470

5,850

u

u

u

u

u

u

311

u

u

181J

199J

420

u

283

u

u

u

u

u

97,000

u

300880

Z4-8-3

Z4-7-3

Z4-6-3

Z4-7-6

Z4-4-6

Z4-9-6

Z4-6A-3

Z4-17-3

Z4-17-6

Z4-13-6

Z4-6A-6

Z4-9-6-REP

Z4-9-6-DUP

Z4-1-2

Z4-9-3

Z4-13-3

Z4-4-3

Z4-1-3

Z4-4-6-DUP

Z4-13-3-REP

Z4-18-6

Z4-23-12

Z4-9A-11.5

Z4-22-6

Z4-9A-6

Z4-9A-6-DUP

12 January 1998

12 January 1998

1 2 January 1 998

12 January 1998

12 January 1998

12 January 1998

1 2 January 1 998

12 January 1998

12 January 1998

12 January 1998

12 January 1998

12 January 1998

12 January 1998

12 January 1998

12 January 1998

12 January 1998

12 January 1998

12 January 1998

12 January 1998

12 January 1998

13 January 1998

13 January 1998

13 January 1998

13 January 1998

13 January 1998

13 January 1998

5,790

u

7,070

u

4,450

1,020

4,670

244J

u

u

550

1,160

1,220

21,450

101,300

u

2,220

25,910

4,370

u

u

u

u

u

310

372

10

300881

Z4-24-6

Z4-15-6

Z4-26-6

Z4-26-6 REP

Z4-70-6

Z4-23-6

Z4-14-12

Z4-70-12

Z4-24-6 DUP

Z4-20-6

Z4-14-6

Z4-11-6

Z4-26-12

Z4-14-6-REP

Z4-12-6

Z4-29-6

Z4-30-6

Z4-75-12

Z4-75-6

Z1-7A-6

Z1-7A-6-REP

Z2-2-6

Z2-1-12

Z3-9A-6-DUP

Z3-9A-6

Z3-2A-6

13 January 1998

13 January 1998

13 January 1998

13 January 1998

13 January 1998

13 January 1998

13 January 1998

13 January 1998

13 January 1998

13 January 1998

13 January 1998

13 January 1998

13 January 1998

13 January 1998

13 January 1998

13 January 1998

13 January 1998

13 January 1998

13 January 1998

13 January 1998

13 January 1998

13 January 1998

13 January 1998

13 January 1998

13 January 1998

13 January 1998

u

421

u

101J

u

u

u

u

u

u

1,180

I27J

u

1,100

u

u

u

u

u

15,300

14,700

u

u

u

u

u

11300882

Z3-9-6

Z3-4A-6

Z3-40-6

Z3-1-6

Z3-1-6-DUP

Z3-9-6-REP

Zl-1-6

Z1-8-5-DUP

Z2-2-12

Z4-22-3

Z4-12-3

Z4-29-3

Z4-24-3

Z4-27-6

Z4-18-3

Zl-8-5

Z4-18-3-REP

Z3-9B-6

Z3-3-6

Z3-16-6-DUP

Z3-16-6

Z3-16-6-REP

Z4-24-3-DUP

Z4-15-6

Z3-4-6

Z3-9D-6

13 January 1998

13 January 1998

13 January 1998

13 January 1998

13 January 1998

13 January 1998

14 January 1998

14 January 1998

14 January 1998

14 January 1998

14 January 1998

14 January 1998

14 January 1998

14 January 1998

14 January 1998

14 January 1998

14 January 1998

14 January 1998

14 January 1998

14 January 1998

14 January 1998

14 January 1998

14 January 1998

14 January 1998

14 January 1998

14 January 1998

u

u

u

800

940

u

236J

7,540

u

u

770

322

314

195J

730

6,940

700

u

u

u

u

u

368

u

u

u

12

300883

Z3-9D-6-REP

Z5-9-6

Z5-8-6

Z5-27-6

Z5-35-6

Z5-21-6

Z5-33-6

Z5-28-6

Z5-21-6-DUP

Z5-18-6

Z5-18-6-REP

Z2-6-6

Z2-3-6

Z2-3A-6

Z2-9-4

Z3-1A-6

Z3-13-6

Z2-2A-6

Z2-2A-6-DUP

Z3-9C-6

Z3-9C-6-REP

Z4-2A-6

Z3-2-6

Z2-8-6

Z4-4A-6

Z5-20-6

14 January 1998

14 January 1998

14 January 1998

14 January 1998

14 January 1998

14 January 1998

14 January 1998

14 January 1998

14 January 1998

14 January 1998

14 January 1998

14 January 1998

14 January 1998

14 January 1998

14 January 1998

14 January 1998

14 January 1998

14 January 1998

14 January 1998

14 January 1998

14 January 1998

14 January 1998

14 January 1998

14 January 1998

14 January 1998

14 January 1998

u

u

u

u

u

u

u

129J

u

u

u

130J

u

u

18,030

u

u

u

u

u

u

u

23 2J

u

u

u

13

300884

Z5-7-6

Z4-4A-6-DUP

Z4-2-6

Z4-2-6-REP

Z4-10A-6

Z4-20-3

Z4-3-6

Z4-18B-6-DUP

Z4-3A-6

Z4-10-6

Z4-15-3

Z4-11-3

Z4-2B-6

Z4-10-6 REP

Z4-2-3

Z4-2A-3

Z4-6A-12

Z4-9-12

Z4-4-12

Z4-8A-6

Z4-26-3

Z4-26-3-DUP

Z4-14-3

Z4-6A-12-REP

Z4-27-3

Z4-30-3

14 January 1998

14 January 1998

14 January 1998

14 January 1998

15 January 1998

15 January 1998

15 January 1998

15 January 1998

15 January 1998

15 January 1998

15 January 1998

15 January 1998

15 January 1998

15 January 1998

15 January 1998

15 January 1998

15 January 1998

15 January 1998

15 January 1998

15 January 1998

15 January 1998

15 January 1998

15 January 1998

15 January 1998

16 January 1998

16 January 1998

u

u

620

650

142J

570*

u

u

u

6,470

6,570

5,430

u

7,160

17,200

u

173

218J

488

216J

u

u

6,640

156J

3,030

u

14

300885

Z4-18B-6

Z4-14A-6

Z4-77-6

Z3-11-6

Z3-11-6-DUP

Z3-8-6

Z3-7-6

Z3-48-6

Z3-48-6-REP

Z3-10-6

Z3-41-6

Z3-7A-6

Z3-6A-6

Z3-43-8

Z3-5-6

Z3-6-6

Z3-6-6-DUP

Z3-42-6

Z3-8A-6

Z3-8A-6-REP

Z4-4-12

Z4-38-6

Z4-64-6

Z4-43-6

Z4-39-6

Z4-70-3

16 January 1998

16 January 1998

16 January 1998

16 January 1998

16 January 1998

16 January 1998

16 January 1998

16 January 1998

16 January 1998

16 January 1998

16 January 1998

16 January 1998

16 January 1998

16 January 1998

1 6 January 1 998

1 6 January 1 998

16 January 1998

1 6 January 1 998

16 January 1998

16 January 1998

16 January 1998

16 January 1998

16 January 1998

16 January 1998

16 January 1998

16 January 1998

u

u

810

u

u

u

236J

u

u

u

127J

u

u

u

u

u

u

u

u

u

2,580

328

1,010

u

940

291

15

300886

Z4-23-3

Z5-41-6

Z5-41 -6-DUP

Z5-10-6

Z5-10-6-REP

Z4-52-6

Z4-63-6

Z4-66-6

Z4-38-6

Z4-73-6

Z4-66-6-DUP

Z4-74-6

Z4-34-6

Z4-32-6

Z4-32-6-REP

Z5-6-6

Z4-41-6

Z4-4-12-REP

Z4-14A-3

Z4-12-6

Z4-12-6-DUP

Z4-8A-3

Z4-3A-3

Z4-35-6

Z4-40-6

Z4-36-6

16 January 1998

16 January 1998

16 January 1998

16 January 1998

16 January 1998

16 January 1998

16 January 1998

16 January 1998

16 January 1998

16 January 1998

16 January 1998

16 January 1998

16 January 1998

16 January 1998

16 January 1998

16 January 1998

16 January 1998

16 January 1998

19 January 1998

19 January 1998

19 January 1998

19 January 1998

19 January 1998

19 January 1998

19 January 1998

19 January 1998

1,110

u

u

1,800

2,080

u

353

u

u

u

117J

109J

6,580

u

161J

7,100

610

2,930

242J

u

u

I71J

u

1,400

151J

492

16

300887

Z4-41-6

Z4-31-6

Z4-36-6-REP

Z4-38-3

Z4-63-3

Z4-39-3

Z4-34-12

Z4-2B-3

Z4-77-12

Z4-77-12-DUP

Z4-4-18

Z4-52-3

Z4-43-3

Z4-63-3-REP

Z4-44-6

Z4-46-6

Z4-46-6-DUP

Z4-58-6

Z4-47-6

Z4-3-3

Z4-10-12

Z4-10A-3

Z4-6-12-REP

Z4-18B-3

Z4-18B-3-REP

Z4-66-3

19 January 1998

19 January 1998

19 January 1998

19 January 1998

19 January 1998

19 January 1998

19 January 1998

19 January 1998

19 January 1998

19 January 1998

19 January 1998

19 January 1998

19 January 1998

19 January 1998

19 January 1998

19 January 1998

19 January 1998

19 January 1998

19 January 1998

19 January 1998

19 January 1998

19 January 1998

19 January 1998

19 January 1998

19 January 1998

19 January 1998

580

u

630

u

436

332

2,270

163J

u

103J

109J

1,020

1,150

570

u

1,000

1,170

179J

1,150

94J

u

680

178J

u

u

u

17

300888

Z4-44-12

Z4-32-3

Z3-41-3

Z3-41-3-DUP

Z4-1R-6

Z4-53-6

Z4-49-6

Z4-74-3

Z4-64-12

Z4-64- 12-REP

Z4-61-6

Z4-57-6

Z4-66-3-DUP

Z3-7-3

Z3-8-3

Z3-42-3

Z3-8A-3

Z3-12-6

Z3-6A-3

Z3-10-3

Z3-10-3-REP

Z5-10-3

Z5-6-9

Z5-41-3

Z3-6-3

Z2-9R-6

19 January 1998

19 January 1998

19 January 1998

19 January 1998

19 January 1998

1 9 January 1 998

19 January 1998

19 January 1998

19 January 1998

19 January 1998

19 January 1998

19 January 1998

19 January 1998

19 January 1998

19 January 1998

19 January 1998

19 January 1998

1 9 January 1 998

19 January 1998

19 January 1998

19 January 1998

19 January 1998

19 January 1998

19 January 1998

19 January 1998

19 January 1998

u

3,840

12,990

11,430

1,690

u

9,540

218J

u

u

489

4,120

u

432

111J

u

23 U

u

u

127J

u

2,590

1,820

544

434

u

18

300889

Z3-11-3

Z5-34-6

Z5-34-6-DUP

Z5-42-6

Z5-7-6

Z5-7-6-REP

Z3-2A-3

Z3-5-3

Z3-48-3

Z3-43-3

Z5-38-6

Z4-2-12

Z4-2-12-REP

Z4-1R-12

Z4-19A-6

Z5-48-6

Z5-14-6

A5-1-6

A6-10-6

Z2-2-3

Z4-1R-15

Z4-1R-18

Z4-33-3

Z3-9A-3

Z3-9A-3-DUP

A5-1-6-REP

19 January 1998

19 January 1998

19 January 1998

19 January 1998

19 January 1998

19 January 1998

19 January 1998

1 9 January 1 998

19 January 1998

19 January 1998

19 January 1998

19 January 1998

19 January 1998

19 January 1998

19 January 1998

20 January 1998

20 January 1998

20 January 1998

20 January 1998

20 January 1998

20 January 1 998

20 January 1998

20 January 1998

20 January 1998

20 January 1998

20 January 1998

560

u

u

u

u

228J

1,330

u

u

u

u

8,060

8,850

1,860

u

u

166J

35,650

u

140J

830

750

1,070

590

469

35,440

19

300890

Z3-9-3

Z3-7A-3

Z2-3A-3

Z3-9C-3

Z3-1A-3

Z3-4-3

Z3-4A-3

Z3-40-6

Z4-19A-3

Z5-9-3

Z3-4A-3 REP

Z3-1-3

Z3-13-3

Z4-1R-24

Z4-4-15

Z4-46-12A

Z4-46-12B

Z4-46-12B-DUP

Z2-1-5.5

Z2-3-3

Z3-9D-3

Z5-28-3

Z5-28-3 REP

Z2-8-6

Z2-7A-3

Z2-6-3

20 January 1998

20 January 1998

21 January 1998

21 January 1998

21 January 1998

21 January 1998

21 January 1998

21 January 1998

21 January 1998

21 January 1998

21 January 1998

21 January 1998

21 January 1998

21 January 1998

21 January 1998

21 January 1998

21 January 1998

21 January 1998

21 January 1998

21 January 1998

21 January 1998

21 January 1998

21 January 1998

22 January 1998

22 January 1998

22 January 1998

215J

171J

u

u

710

5,190

415

u

2,670

890

526

590

u

338

u

u

u

u

u

147J

203J

1,110

930

u

124J

4,190

20

300891

Z2-7-6

Zl-1-3

Z4-46-18

Z5-35-3

Z5-35-3-DUP

Z5-15-6

Z5-33-3

Z5-33-3-REP

A5-1-24

Z5-20-3

Z5-21-3

Z4-39-12

Z4-30-6

Z4-44-12

Z5-18-3

Z1-7A-12

Zl-10-6

Z1-7A-12DUP

Z1-10-6-REP

Z6-10-3

Zl-1-3

Z6-1-6

Z6-1-6-REP

Z5-8-3

Z5-38-3

22 January 1998

22 January 1998

22 January 1998

22 January 1998

22 January 1998

22 January 1998

22 January 1998

22 January 1998

22 January 1998

22 January 1998

22 January 1998

22 January 1998

22 January 1998

22 January 1998

22 January 1998

22 January 1998

22 January 1998

22 January 1 998

22 January 1998

22 January 1998

22 January 1998

22 January 1998

22 January 1998

23 January 1998

23 January 1998

u

u

u

267J

331

u

4,820

4,710

1,030

130J

u

u

u

191J

129J

u

u

u

193J

u

u

333

u

131J

5,680

21

300892

Z5-28-3

Z5-10-10

Z5-48-3

Z5-6-10

Z5-34-3

Z5-42-3

Z5-38-3-DUP .

Z5-14-3

Z5-14-3-REP

Z5-27-3

Z3-16-3

Z3-9B-3

Z3-40-3

Z3-1-12

Z3-2-3

Z3-3-3

Z3-12-3

Z4-40-3

Z4-40-3 DUP

Z3-3-3-REP

Z4-2-13

Z4-44-3

Z4-47-12

Z4-49-12

Z4-61-3

Z4-44-3-REP

23 January 1998

23 January 1998

23 January 1998

23 January 1998

23 January 1998

23 January 1998

23 January 1998

23 January 1998

23 January 1998

23 January 1998

23 January 1998

23 January 1998

23 January 1998

23 January 1998

23 January 1998

23 January 1998

23 January 1998

23 January 1998

23 January 1998

23 January 1998

23 January 1998

23 January 1998

23 January 1998

23 January 1998

23 January 1998

23 January 1998

278

2,900

186J

2,770

1,330

1,450

6,580

570

850

323

286

u

137J

u

4,380

1,110

u

3,950

3,260

1,210

7,040

447

u

269J

710

620

22

300893

Z4-57-12

Z4-57-12-DUP

Z4-77-3

Z3-6B-6

Z4-35-12

Z4-34-15

Z4-34-15-DUP

Z4-75-3

Z4-53-3

Z4-73-3

Z4-36-12

Z4-31-3

Z4-41-12

Z4-58-3

Z4-64-3

Z4-64-3-REP

Z2-8-3

Z2-1-3

Z3-9D-3

Z3-6B-3

Z6-1-3

Z5-15-3

A5-1-48

Z4-35-18

Z4-34-18

Z4-34-18-DUP

23 January 1 998

23 January 1998

23 January 1998

23 January 1998

23 January 1998

26 January 1998

26 January 1998

26 January 1998

26 January 1998

26 January 1998

26 January 1998

26 January 1998

26 January 1998

26 January 1 998

26 January 1 998

26 January 1998

26 January 1998

26 January 1998

26 January 1998

26 January 1 998

26 January 1998

26 January 1998

26 January 1998

26 January 1998

26 January 1 998

26 January 1998

u

u

u

u

3,760

1,900

1,830

209J

900

1,090

u

1,530

122J

630

267J

338

u

228J

94J

105J

1,150

401

u

413

u

u

23

300894

Z4-35-18-REP

S-l

S-2

S-3

S-4

S-5

S-6

Z2-7-3

GS-2

GS-15

GS-8

GS-13

GS-6

GS-6-DUP

GS-12

GS-1

GS-16

GS-14

GS-14-REP

GS-23

GS-21

GS-5

GS-29

GS-26

GS-25

GS-25-DUP

26 January 1998

27 January 1 998

27 January 1998

27 January 1 998

27 January 1998

27 January 1 998

27 January 1 998 ,

27 January 1998

29 January 1998

29 January 1998

29 January 1998

29 January 1998

29 January 1998

29 January 1998

29 January 1998

29 January 1998

29 January 1998

29 January 1998

29 January 1998

29 January 1998

29 January 1998

29 January 1998

29 January 1998

29 January 1998

29 January 1998

29 January 1998

247J

910

1,250

15,590

333

1,570

1,310

u

22,210

475

670

770

u

u

1,770

317

5,400

12,480

12,250

368

3,700

u

18,840

2,260

13,760

21,600

24

300895

GS-25-D-REP

GS-27

GS-18

GS-28

GS-10

GS-31

GS-22

GS-30

GS-20

GS-19

GS-17

GS-32

GS-32-DUP

GS-11

GS-7

GS-7-REP

GS-3

GS-4

GS-24

GS-24-REP

GS-9

GS-9-REP

GS-15-REP

GS-44

GS-37

GS-33

29 January 1998

29 January 1998

29 January 1998

29 January 1998

29 January 1998

30 January 1998

30 January 1998

30 January 1998

30 January 1998

30 January 1998

30 January 1998

30 January 1998

30 January 1998

30 January 1998

30 January 1998

30 January 1998

30 January 1998

30 January 1998

30 January 1998

30 January 1998

30 January 1998

30 January 1998

30 January 1998

2 February 1998

2 February 1998

2 February 1998

20,050

1,170

2,860

10,460

376

1,940

300

u

15,260

33,430

231J

2,430

2,750

610

523

604

1,860

274J

25,600

25,010

264J

251J

432

9,640

690

u

25

300896

GS-33-DUP

GS-41

GS-34

GS-38

GS-40

GS-35

GS-43

GS-40-REP

GS-34-REP

GS-54

GS-36

GS-39

GS-54-DUP

GS-43-R

GS-43-REP

GS-58

GS-42

GS-47

GS-48

GS-57

GS-47-REP

GS-46

GS-52

GS-50

GS-52-DUP

GS-56

2 February 1998

2 February 1998

2 February 1998

2 February 1 998

2 February 1998

2 February 1998

2 February 1998

2 February 1 998

2 February 1998

2 February 1998

2 February 1998

2 February 1998

2 February 1998

2 February 1998

2 February 1998

2 February 1998

2 February 1 998

2 February 1 998

2 February 1998

2 February 1998

2 February 1998

2 February 1998

2 February 1998

2 February 1998

2 February 1998

2 February 1 998

130J

u

215J

562

277J

u

940

455

285

2,070

u

238J

2,550

486

580

107J

u

272J

910

1,550

158J

113J

u

u

u

6,380

26

300897

GS-49

GS-53

GS-51

GS-45

GS-50-REP

GS-55

GS-55-REP

PILE-1

PILE-2

PILE-2-DUP

PILE-3

PILE-4

PILE-4-REP

PILE-4-REP(2)

PILE-2-REP

PILE-2-REP

GS-43R

GS-49R

GS-57R

GS-48R

GS-38R

GS-55R

GS-37R

GS-54R

GS-54R-DUP

GS-56R

2 February 1998

2 February 1998

2 February 1998

2 February 1998

2 February 1998

3 February 1998

3 February 1998

9 February 1998

9 February 1998

9 February 1998

9 February 1998

9 February 1998

9 February 1998

9 February 1998

9 February 1998

9 February 1998

10 February 1998

10 February 1998

10 February 1998

10 February 1998

10 February 1998

10 February 1998

10 February 1998

10 February 1998

10 February 1998

10 February 1998

1,400

u

u

2,670

u

1,730

1,970

368

415

273J

250J

548

374

489

236J

467

279

1,650

3,180

1,210

463

2,640

476

2,410

2,380

5,720

27

300898

GS-56R-REP

' GS-45R

GS-51R

GS-50R

GS-44R

GS-43R-REP

GS-66

GS-65

GS-60

GS-63

GS-67

GS-67-DUP

GS-64

GS-61

GS-59

GS-68

GS-64-REP

GS-62

GS-70

GS-71

GS-69

GS-66-R

GS-65-R

GS-60-R

GS-63-R

GS-67-R

10 February 1998

10 February 1998

10 February 1998

10 February 1998

10 February 1998

10 February 1998

11 February 1998

11 February 1998

11 February 1998

1 1 February 1 998

11 February 1998

11 February 1998

1 1 February 1 998

1 1 February 1 998

1 1 February 1 998

11 February 1998

11 February 1998

11 February 1998

11 February 1998

11 February 1998

1 1 February 1 998

11 February 1998

11 February 1998

11 February 1998

11 February 1998

11 February 1998

5,840

3,640

u

u

14,610

538

u

200J

u

u

u

u

830

790

198J

750

670

990

u

u

u

u

283

u

u

u

28

300899

GS-67-DUP-R

GS-64-R

GS-61-R

GS-59-R

GS-68-R

GS-62-R

GS-70-R

GS-71-R

GS-69-R

GS-66-RR

GS-65-RR

GS-60-RR

GS-63-RR

GS-67-RR

GS-67-DUP-RR

GS-64-RR

GS-61RR

GS-59-RR

GS-68-RR

GS-62-RR

GS-70-RR

GS-71-RR

GS-69-RR

GS-72

GS-73

GS-74

11 February 1998

11 February 1998

11 February 1998

11 February 1998

11 February 1998

11 February 1998

11 February 1998

11 February 1998

11 February 1998

11 February 1998

11 February 1998

11 February 1998

11 February 1998

11 February 1998

1 1 February 1 998

11 February 1998

11 February 1998

11 February 1998

11 February 1998

11 February 1998

11 February 1998

11 February 1998

11 February 1998

12 February 1998

12 February 1998

12 February 1998

u

600

860

367

810

860

u

u

u

u

242J

u

u

u

u

650

970

296

1,010

1,300

u

u

u

u

u

u

29

300900

GS-75

GS-76

GS-77

GS-77-DUP

GS-72-R

GS-73-R

GS-74-R

GS-75-R

GS-76-R

GS-77-R

GS-77-DUP-R

GS-75-RR

GS-72-RR

GS-73-RR

GS-74-RR

GS-76-RR

GS-77-RR

GS-77-D-RR

GS-61-A

GS-61-A-DUP

GS-62-A

GS-64-A

GS-68-A

GS-62-A-REP

GS-84

GS-78

12 February 1998

12 February 1998

12 February 1998

12 February 1998

12 February 1998

12 February 1998

12 February 1998

12 February 1998

12 February 1998

12 February 1998

12 February 1998

12 February 1998

12 February 1998

12 February 1998

12 February 1998

12 February 1998

12 February 1998

12 February 1998

19 February 1998

19 February 1998

19 February 1998

19 February 1998

19 February 1998

19 February 1998

21 February 1998

21 February 1998

150J

189J

176J

154J

u

u

u

348

142J

104J

154J

183J

u

u

u

200J

133J

138J

u

u

336

93J

u

155J

146J

700

30

300901

GS-83

GS-79

GS-80

GS-99

GS-94

GS-93

GS-93-DUP

GS-78-REP

GS-92

GS-95

GS-105

GS-86

GS-85

GS-96

GS-81

GS-82

GS-98

GS-98-DUP

GS-92-REP

GS-85-REP

GS-101

GS-97

GS-100

GS-102

GS-104

GS-91

21 February 1998

21 February 1998

21 February 1998

21 February 1998

21 February 1998

21 February 1998

21 February 1998

21 February 1998

21 February 1998

21 February 1998

21 February 1998

21 February 1998

21 February 1998

21 February 1998

21 February 1998

21 February 1998

21 February 1998

21 February 1998

21 February 1998

21 February 1998

21 February 1998

21 February 1998

21 February 1998

21 February 1998

21 February 1998

21 February 1998

1,370

116J

2,630

u

178J

u

u

640

1,050

138J

u

238J

3,320

u

720

145J

250J

171J

1,070

3,360

150J

u

u

u

u

330

31

300902

GS-87

GS-88

GS-90

GS-90-DUP

GS-89

GS-89-REP

GS-103

GS-87-REP

GS1-16

GS1-12

GS1-23

GS1-15

GS1-15-DUP

GS1-10

GS1-24

GS1-21

GS1-20

GS1-17

GS1-17-REP

GS1-11

GS1-18

GS1-14

GS1-22

GS1-25

GS1-13

GS1-19

21 February 1998

21 February 1998

21 February 1998

21 February 1998

21 February 1998

21 February 1998

21 February 1998

21 February 1998

25 February 1998

25 February 1998

25 February 1998

25 February 1998

25 February 1998

25 February 1998

25 February 1998

25 February 1998

25 February 1998

25 February 1998

25 February 1998

25 February 1998

25 February 1998

25 February 1998

25 February 1998

25 February 1998

25 February 1998

25 February 1998

1,100

2,850

130J

u

6,120

6,020

269J

900

890

u

u

950

445

u

u

u

1,380

3,450

2,560

u

2,220

u

u

97J

103J

u

32

300903

GS1A-8

GS1A-6

GS1A-8-DUP

GS1A-5

GS1A-5-REP

GS1A-2

GS1A-9

GS1A-3

GS1A-1

GS1A-7

GS1A-7-DUP

GS1A-4

GS1A-4-REP

BA2D-3

BA2D-1

BA2D-6

BA2D-3-DUP

BA2D-5

BA2D-2

BA2D-4

BA2D-4-REP

GS1-26

GS1-27

GS1-28

GS2-29

GS2-30

25 February 1998

25 February 1998

25 February 1998

25 February 1998

25 February 1998

25 February 1998

25 February 1998

25 February 1998

25 February 1998

25 February 1998

25 February 1 998

25 February 1998

25 February 1998

2 March 1998

2 March 1998

2 March 1998

2 March 1998

2 March 1998

2 March 1998

2 March 1998

2 March 1998

3 March 1998

3 March 1998

3 March 1998

3 March 1998

3 March 1998

u

3,200

u

465

539

u

u

u

u

1,280

1,800

1,630

1,630

134J

115J

870

192J

870

212J

1,040

1,010

u

242J

u

u

195J

33

300904

GS2-31

GS2-32

GS2-32-DUP

GS2-33

GS2-34

GS2-31-REP

GS2-35

GS2-36

GS2-37

GS2-38

GS2-39

GS2-33-DUP

GS2-40

GS2-41

GS2-42

GS2-43

GS2-43-REP

GS2-44

GS2-45

GS2-46

GS2-47

GS2-47-DUP

GS2-48

GS2-49

GS2-50

GS2-51

3 March 1998

3 March 1998

3 March 1998

3 March 1998

3 March 1998

3 March 1998

3 March 1998

3 March 1998

3 March 1998

3 March 1998

3 March 1998

3 March 1998

3 March 1998

3 March 1998

3 March 1998

3 March 1998

3 March 1998

3 March 1998

3 March 1998

3 March 1998

3 March 1998

3 March 1998

3 March 1998

3 March 1998

3 March 1998

3 March 1998

u

8,500

6,800

199J

u

u

u

u

u

u

196J

160J

u

u

190J

292

434

u

u

408

u

u

u

1,050

u

u

34

300905

GS2-52

GS2-49-REP

GS2-46-REP

GS2-52-REP

GS2-53

GS2-54

GS2-54-DUP

GS1A-4A

GS1A-7A

GS1A-5A

GS1A-6A

GS1-15A

GS1-16A

GS1-17A

GS2-53-REP

GS2-55

GS1-18A

GS1-18A-DUP

GS1-20A

GS1-55-DUP

BA2D-8

BA2D-7

BA2D-9

BA2D-10

BA2D-8-DUP

BA2D-9-REP

3 March 1998

3 March 1998

3 March 1998

3 March 1998

3 March 1998

3 March 1998

3 March 1998

3 March 1998

3 March 1998

3 March 1998

3 March 1998

3 March 1998

3 March 1998

3 March 1998

3 March 1998

3 March 1998

3 March 1998

3 March 1998

3 March 1998

3 March 1 998

4 March 1998

4 March 1998

4 March 1998

4 March 1998

4 March 1998

4 March 1998

311

1,160

570

387

1,330

u

u

u

u

u

376

u

u

356

1,090

550

2,040

1,900

u

470

u

364

484

u

u

361

35

300906

GSNA-7

GSNA-4

GSNA-2

GSNA-6

GSNA-3

GSNA-5

GSNA-1

GSNA-1-DUP

GSNA-3-DUP

GS4-85A

GS4-78A

GS4-89A

GS4-80A

GS4-87A

GS4-83A

GS4-85A-REP

GS4-88A

GS4-81A

GS4-92A

GS4-92A-DUP

GS4-88A-REP

GS2-52-A

GS2-49-A

GS2-49-A-DUP

GS2-55-A

GS2-53-A

4 March 1998

4 March 1998

4 March 1998

4 March 1998

4 March 1998

4 March 1998

4 March 1998

4 March 1998

4 March 1998

4 March 1998

4 March 1998

4 March 1998

4 March 1998

4 March 1998

4 March 1998

4 March 1998

4 March 1998

4 March 1998

4 March 1998

4 March 1998

4 March 1998

5 March 1998

5 March 1998

5 March 1998

5 March 1998

5 March 1998

600

2,810

2,050

2,260

5,410

610

435

1,060

6,150

459

376

u

23 2J

560

1,800

510

890

1,200

1,560

1,140

930

u

u

u

u

u

36

300907

GS2-46-A

GS2-49-A-REP

GS1-18B

GS1-18B-DUP

GS2-52-A-REP

NA2-6

NA2-4

NA2-5

NA2-8

NA2-9

NA2-10

NA2-10-DUP

NA2-7

NA2-7-REP

NA2-3

NA2-1

NA2-2

GS2-71

GS2-60

GS2-56

GS2-67

GS2-65

GS2-59

GS2-64

GS2-64-DUP

GS2-57

5 March 1998

5 March 1998

5 March 1998

5 March 1998

5 March 1998

6 March 1998

6 March 1998

6 March 1998

6 March 1998

6 March 1998

6 March 1998

6 March 1998

6 March 1998

6 March 1998

6 March 1998

6 March 1998

6 March 1998

9 March 1998

9 March 1998

9 March 1998

9 March 1998

9 March 1998

9 March 1998

9 March 1998

9 March 1998

9 March 1998

u

u

u

u

u

235J

u

870

95J

700

253J

116J

1,070

730

u

u

u

u

u

248J

u

u

u

u

u

319

37

300908

GS2-69

GS2-57-REP

GS2-61

GS2-61-DUP

GS2-63

GS2-66

GS2-68

GS2-62

GS2-70

GS2-58

GS2-61-REP

GS2-72

GS2-79

GS2-77

GS2-76

GS2-83

GS2-83-DUP

GS2-80

GS2-78

GS2-81

GS2-82

GS2-82-REP

GS2-73

GS2-76-DUP

GS2-74

GS2-75

9 March 1998

9 March 1 998

9 March 1998

9 March 1998

9 March 1998

9 March 1 998

9 March 1998

9 March 1998

9 March 1998

9 March 1998

9 March 1998

10 March 1998

10 March 1998

10 March 1998

10 March 1998

10 March 1998

10 March 1998

10 March 1998

10 March 1998

10 March 1998

10 March 1998

10 March 1998

10 March 1998

10 March 1998

10 March 1998

10 March 1998

u

121J

420

396

u

u

u

119J

u

u

342

161J

u

u

208J

u

u

u

u

u

114J

u

480

288

424

349

38

300909

GS2-73-REP

GS2-74-REP

GS2-73-REP-2

NA2-7A

NA2-9A

NA2-9A-DUP

NA2-5A

GS2-73-REP-3

GS3-7

GS3-8

GS3-2

GS3-3

GS3-5

GS3-2-DUP

GS3-6

GS3-4

GS3-1

GS3-10

GS3-10-DUP

GS3-11

GS3-11-DUP

GS3-12

GS3-9

ZONE 3-PIT

GS3-9-RJEP

GS3-14

10 March 1998

10 March 1998

10 March 1998

10 March 1998

10 March 1998

10 March 1998

10 March 1998

10 March 1998

11 March 1998

11 March 1998

11 March 1998

1! March 1998

11 March 1998

11 March 1998

11 March 1998

11 March 1998

11 March 1998

11 March 1998

11 March 1998

11 March 1998

11 March 1998

11 March 1998

11 March 1998

11 March 1998

11 March 1998

13 March 1998

603

315

453

u

u

u

u

564

1,380

163J

u

1,830

u

u

105J

u

1,380

2,550

2,370

2,120

2,040

1,370

u

245J

u

337

39

300910

GS3-15

GS3-16

GS3-17

GS3-18

GS3-19

GS3-20

GS3-21

GS3-21-DUP

GS3-22

GS3-22-REP

TSPIT-1

TSPIT-2

TSPIT-2-DUP

TSPIT-3

G.Q TOP SOIL

G.Q.A-2-4

GS3-13

GS3-1A

GS3-3A

GS3-7A

GS3-7A-DUP

GS3-10A

GS3-11A

GS3-12A

GS3-1A-REP

GS3-1A-REP2

13 March 1998

13 March 1998

13 March 1998

13 March 1998

13 March 1998

13 March 1998

13 March 1998

13 March 1998

13 March 1998

13 March 1998

13 March 1998

13 March 1998

13 March 1998

13 March 1998

13 March 1998

13 March 1998

13 March 1998

13 March 1998

13 March 1998

13 March 1998

13 March 1998

13 March 1998

13 March 1998

13 March 1998

13 March 1998

13 March 1998

u

870

u

u

560

104J

u

u

2,230

2,320

u

u

u

u

u

u

u

530

u

u

u

u

u

u

392

402

40

300911

GS3-16A

GS3-19A

GS3-22A

GS3-19A-REP

GS3-22A-REP

GS3-22A-REP2

GS3-19A-REP2

GS3-19B

GS3-19B-REP

GS5-1

GS5-2

GS5-3

GS5-3-DUP

GS6-1

GS6-2

GS6-2-DUP

GS5-4

GS5-5

GS6-5-REP

GS6-2A

GS6-2A-DUP

GS6-2A-REP

GS5-6

GS5-7

GS5-7-DUP

GS5-6-REP

13 March 1998

13 March 1998

13 March 1998

13 March 1998

13 March 1998

13 March 1998

13 March 1998

16 March 1998

16 March 1998

16 March 1998

16 March 1998

16 March 1998

16 March 1998

17 March 1998

17 March 1998

17 March 1998

17 March 1998

17 March 1998

17 March 1998

18 March 1998

18 March 1998

18 March 1998

19 March 1998

19 March 1998

19 March 1998

19 March 1998

198J

850

570

1,100

485

363

1,280

1,910

1,790

u

104J

u

u

96J

670

920

u

498

408

u

u

96J

481

265J

312

381

41

300912

GS5-8

GS5-9

GS5-10

GS5-11

GS5-12

GS5-13

GS5-13-DUP

GS5-11-REP

GS5-14

GS5-15

GS5-16

GS5-17

GS5-17-DUP

GS5-18

GS5-18-REP

GS5-17-A

GS5-17-A-DUP

GS5-18-A

20 March 1998

20 March 1998

20 March 1998

20 March 1998

20 March 1998

20 March 1 998

20 March 1998

20 March 1998

23 March 1998

23 March 1998

23 March 1998

23 March 1998

23 March 1998

23 March 1998

23 March 1998

24 March 1 998

24 March 1998

24 March 1 998

u

u

u

102J

u

u

u

130J

100

210J

u

540

500

820

1,180

u

u

u

42

300913

ATTACHMENT II

300914

\

ZONE #4BURN AREA 4

SAMPLING DATE27 JANUARY 1598

oooovoHUl

Roy F. Weston, Inc.FEDERAL PROGRAMS DIVISION

IN ASSOCIATION WITH PRO ENVIRONMENTAL MANAGEMENT. INC..C.C. JOHNSON It MALHOTRA. P.C., RESOURCE APPLICATIONS. INC.,R.E. SARRIERA ASSOCIATES, AND GRB ENVIRONMENTAL SERVICES, INC.

- DRAWING NOT TO SCALE -

FIGURE 2.1 - GRID SAMPLE LOCATIONS FORCLEAN UP CONFIRMATION

V&M - ALBALADEJOPUERTO RICO

US EPA REMOVAL ACTION BRANCHSUPEHAMD TECHNICAL ASSESSMENT AND RESPONSE TEAM

CONTKACTf 8B-W3-0019

DRAWN BY : J. HAMPTON JR. - EGL

EPA TASK MONITOR: A. RODRIGUEZ

START PROJECT MANAGER: D. MIRANDA

10ovo

1 H

GS-1,ZONE #4BURN AREA 4

^..' v ^~> ' fi r/ \ £• y^f- r>o oo i GS-2 GS-5 \GS-9 < ^ „--——-__^^GS-22 *

/ * ^ "GS-*13 GS-17 """'

\GS-3 GS-6 GS-10

\

GS-4 \ GSr7/ GS-ll

\5;4-o D l<2feo

,GS-16 GS-20 GS-25• GS-30 —

GS-311'

SAMPLING DATE29-30 JANUARY 1998

DRAWING NOT TO SCALE -

1 Roy F. Weston, Inc.FEDERAL PROGRAMS DIVISION

IN ASSOCIATION WITH PRC ENVIRONMENTAL MANAGEMENT, INC.,C.C. JOHNSON if MALHOTRA, P.C., RESOURCE APPLICATIONS. INC.,R.E. SARRIERA ASSOCIATES. AND ORB ENVIRONMENTAL SERVICES, INC.



US EPA REMOVAL ACTION BRANCHSUPERFUND TECHNICAL ASSESSMENT AND RESPONSE ItAM

CONTRACT! «B-W5-001»


EPA TASK MONITOR: A. RODRICUE7


GS-33 ZDN£ #4• \ BURN AREA 4

/GS-34 GS-35_ \GS-36/ • -Z'f;j * V-—~

VGS-40 GS-41 GS-42

GS-37 GS-38 -* GS-39v ——GS-44

GS-46

GS-57 (• GS-58

SAMPLING DATE2-3 FEBRUARY 1&98

OOvo


IN ASSOCIATION WITH PRC ENVIRONMENTAL MANAGEMENT. INC.,C.C. JOHNSON It MALHOTRA, P.C., RESOURCE APPLICATIONS, INC.,R.E. SARRIERA ASSOCIATES, AND CRB ENVIRONMENTAL SERVICES, INC.


FIGURE 2.3 - GMD SAMPLE LOCATIONS FORCLEAN UP CONFIRMATION


US EPA REMOVAL ACTION BRANCHSUPERfUNO TECHNICAL ASSESSMENT AND RESPONSE TEAM

CONTRACT; «a-ws-ooi9


EPA TASK MONITOR: A. RODRICUE2


ZDNE #4BURN AREA 4

SAMPLING DATE9 FEBRUARY 1998

U>Oo\oH1

00Roy F. Weston, Inc.

FEDERAL PROGRAMS DIVISION

IN ASSOCIATION WITH PRC ENVIRONMENTAL MANAGEMENT, INC.,C.C. JOHNSON & MALHOTRA. P.C.. RESOURCE APPLICATIONS, INC.,R.E. SARRIERA ASSOCIATES. AND CRB ENVIRONMENTAL SERVICES, INC.




US EPA REMOVAL ACTION BRANCHSUPERFUND TECHNICAL ASSESSMENT AND RESPONSE TEAM

CONTFACTf 88-W5-0019


EPA TASK MONITOR: A. RODRICUEZ


ZONE #4BURN AREA 4

GS-59 ...GS-60_3 GT

GS-61 .^-—-w^


U)ooto





US EPA REMOVAL ACTION BRANCHSUPEROINO TECHNICAL ASSESSMENT AND RESPONSE TEAM

CONTRACT^ B»-WS-OOU


IN ASSOCIATION WITH PRC ENVIRONMENTAL MANAGEMENT, INC.,C.C. JOHNSON fc MALHOTRA. P.C.. RESOURCE APPUCATIONS, INC.,R.E. SARRIERA ASSOCIATES, AND GRB ENVIRONMENTAL SERVICES. INC.

EPA TASK MONITOR; A. RODRICUE2


N

ZONE'#4BURN AREA 4

N


OOVOtoO



IN ASSOCIATION WITH PRC ENVIRONMENTAL MANAGEMENT. INC..C.C. JOHNSON It MALHOTRA. P.C.. RESOURCE APPLICATIONS. INC.,R.E. SARRIERA ASSOCIATES. AND ORB ENVIRONMENTAL SERVICES, INC.



US EPA REMOVAL ACTION BRANCHSUPERFUNO TECHNICAL ASSESSMENT AND RESPONSE TEAM

CONTRACT* 68-WS-0010

DRAWN BY : J. HAMPTON JR. - ECL


START PROJECT MANAGER: 0. MIRANDA

ZONE #4\ BURN AREA 4

s


U)OOVOto




VkU - ALBALADEJOPUERTO RICO

US EPA REMOVAL ACTION BRANCHSUPEXFUND TECHNICAL ASSESSMENT AMD RESPONSE TEAM

CONTRACT! (B-WS-0019


IN ASSOCIATION WITH PRC ENVIRONMENTAL MANAGEMENT. INC..C.C. JOHNSON It MALHOTRA, P.C.. RESOURCE APPLICATIONS, INC.,R.E. SARRIERA ASSOCIATES. AND CRB ENVIRONMENTAL SERVICES. INC.



ZONE #4BURN AREA 4

GS-7B

GS-88

GS-94,

GS-92 0rGS-93J

GS-97 GS-99i " " ^ A ^ *

GS-85 /

GS-B9

GS-90,

•GS-100__


U>OOvo(Oto Roy F. Weston, Inc.

FEDERAL PROGRAMS DIVISION

IN ASSOCIATION WITH PRC ENVIRONMENTAL MANAGEMENT. INC..C.C. JOHNSON It MALHOTRA. P.C., RESOURCE APPLICATIONS, INC.,R.E. SARRIERA ASSOCIATES. AND GRB ENVIRONMENTAL SERVICES. INC.




US EPA REMOVAL ACTION BRANCHSJPERFVND TECHNICAL ASSESSMENT AND RESPONSE TEAM

CONIHACTf 8S-W5-0019




ZONE #4BURN AREA 4

\

GS4-78A-'V\

GS4-81A

•GS4-83A

SAMPLING DATE4 M*RCH 1998

Roy F. Wesion, Inc.^ FEDERAL PROGRAMS DIVISION'Vr>

IN ASSOCIATION WITH PRC ENVIRONMENTAL MANAGEMENT. INC.,C.C. JOHNSON & MALHOTRA. P.C.. RESOURCE APPLICATIONS, INC.,R.E. SARRIERA ASSOCIATES, AND GRB ENVIRONMENTAL SERVICES. INC.




US EPA REMOVAL ACTION BRANCHSUPERfUNO TtCHNICAL ASSESSMENT AND RESPONSE TEAM

CONTRACT)! 68-W5-C019




300923

SINK HOLE

SAMPLING DATE11 MARCH 1998

- DRIVING NOT TO SCALE -


VJcM - ALBALADEJO FARM SITEPUERTO RICO

US EPA REMOVAL ACTION BRANCHSUTOtfUNO 1CCHMCAL ASSESSMENT AMD RtSTOHSE TEAM

OOHIMACTi M-WS-00<tRoy F. Western, Inc.FEDERAL PROGRAMS DIVISION IT. J. HAMPTON JR. - ECU

EPA PROJECT MANAGER: A. ROORICUEZ

START PROJECT MANAGER: 0. MIRANDAIN ASSOCIATION WITH PRO ENVIRONMENTAL MANAGEMENT. (NO.C.C. JOHNSON k MALHOTRA, P.C. RESOURCE APPLICATIONS. INC.

SARRIERA ASSOOATES, AND CRB ENVIRONMENTAL SERVICES. INC.

C: \CADDOCS\210BB8.DWC

ZONE 3




V«cM - ALBALADEJO FARM SITEPUERTO RICO

US EPA REMOVAL ACTION BRANCHSUPOTUND TEOMCM. ASSESSMENT AND XCSPONSC ItAM

CONTRACT* il-«W-001»Roy F. Weston, Inc.FEDERAL PROGRAMS DIVISION P«A»* its J. HAMPTON JR. - EGL

EPA PROJECT MANAGER:IN ASSOCIATION WITH PRC ENVIRONMENTAL MANAGEMENT. INC,C.C. JOHNSON * MALHOTRA. P.C.. RESOURCE APPLICATIONS, INC..R.E. SAftftlERA ASSOQATES. AND CftB ENVIRONMENTAL SERVICES. INC.


C: \CADDOCS\210BBB.DWG

——I

ZONE 3

I <W\SINK HOLEV. ~^ \

\

I


IN ASSOCIATION WITH PRC ENVIRONMENTAL MANAGEMENT. INC.C.C. JOHNSON * MALHOTRA. P.C.. RESOURCE APPLICATIONS, INC..R.E. SARRIERA ASSOCIATES, AND GRB ENVIRONMENTAL SERVICES, INC.




V&M - ALBALADEJO FARM SITEPUERTO RICO

US EPA REMOVAL ACTION BRANCHSUfOVUNO 1EOMCM. ASSESSMENT AMD RESPONSE 1EAU

Ct-WV-OOIt

OHA«W its J. HAMPTON JR. - GO-

ERA PROJECT MANAGER: A. ROOMCUEZ

START PROgECT MANAGER: D. MIRANDA

VOW<T\OOro

C: \CADDOCS\210BBB.DWC

_L

FEBRUARY 2000 SURFACE SOIL RESULTS

300927

DATE: July 10, 2000

TO: Caroline Kwan, RPM

FROM: Andrew L. Confortini, OSC

Re: February 16th, 2000 Soil Sampling at the V&M/Albaladejo SiteVega Baja, Puerto Rico

On February 16th, 2000, Andrew L. Confortini (EPA/OSC), Greg Powell (EPA/ERT) and AngelRodriguez (EPA/OSC) visited the V&M Site for the purpose of collecting discrete surfacesamples at locations specified in the Memorandum from Susan Schofield (CDM) to CarolineKwan (EPA/RPM) dated February 8th, 2000. A copy of this memorandum is provided asAttachment 1. The memorandum also provides the justification for why it was necessary toobtain these samples.

Sampling involved the collection of twenty (20) surface soil samples using dedicated disposableplastic hand trowels. At the request of the RPM, all samples were submitted for TAL analysisunder the Contract Laboratory Program (CLP). All samples were packaged by the OSC in sealedbags and ice for shipment to the laboratory. Prior to shipment, a Chain-of-Custody seal wasplaced on the cooler.

The analytical results obtained from samples collected during this event are provided in theRecord of Communication package provided as Attachment 2. In summary, elevatedconcentrations of lead were detected at two (2) sample locations, VMA2-2 (855ppm) andVMA4-3 (l,250ppm).

300928

u>oovotovo

X ION[ flBURN AKCA 2

- DfUirlHQ KOT TO ICJL1I -r* -CUD liuru locinsKi ratcum vr coKnuuiiBK

TkM - AlJiUBllft

ooCO

C:\CADOOCS\3Irt»»

00oovou»

- CUD SIMPLE LOCATIONS FORUP cortrmuTiotf-UJALUJUOpuntro RICO

300932

APPENDIX BANALYTICAL DATA

300933

U)OOvoU)it*.

V & M ALBALABEJO NORTEInorganic Analytes

Non-Round February 2000 Sampling Event

04/12/200010:29 AMPage 1

SAMPLE NAMESAMPLE DATETEXT 001LAB SAMPLE ID

Inorganic AnalytesALUMINUMANTIMONYARSENICBARIUMBERYLLIUMCADMIUMCALCIUMCHROMIUMCOBALTCOPPERIRONLEADMAGNESIUMMANGANESEMERCURYNICKELPOTASSIUMSELENIUMSILVERSODIUMTHALLIUMVANADIUMZINC

mg/kgmg/kgmg/kgmg/kgmg/kgmg/kgmg/kgmg/kgmg/kgmg/kgmg/kgmg/kgmg/kgmg/kgmg/kgmg/kgmg/kgmg/kgmg/kgmg/kgmg/kgmg/kgmg/kg

VMA1-0102/16/2000

MBWAOO29537S

13,800.00 EJR42.20 NJ22.90 BNEJ1.50 BNJ0.34 UNJ

4,450.00 J91.70 NEJ14.60 BNJ67.10 NEJ

38,600.00 EJ26.70 J795.00 BE

1,340.00 *EJ0.1620.20 NJ527.00 B

1.10 BNJ0.87 BNJ

319.00 U1.40 UNJ

131.00 NEJ56.60 NJ

VMA1-0202/16/2000

MBWA0129538S


8,240.00 J89.20 NEJ10.70 BNJ89.00 NEJ

38,200.00 EJ24.50 J

1,180.00 EJ1,010.00 *EJ

0.1317.50 NJ837.00 B

0.68 BNJ1.20 BNJ

231.00 U1.00 UNJ

122.00 NEJ51.70 NJ

VMA2-0102/16/2000

MBWA0329540S


4,470.00 J122.00 NEJ28.30 NJ117.00 NEJ

49,300.00 EJ72.80 J520.00 BE

2,760.00 *EJ0.09 B18.60 NJ529.00 B0.75 UNJ1.80 BNJ

298.00 U1.30 UNJ

189.00 NEJ87.20 NJ

VMA2-0202/16/2000

MBUA042954 IS


5,050.00 J117.00 NEJ21.30 NJ579.00 NEJ

58,000.00 EJ855.00 J547.00 BE

2,430.00 *EJ0.09 B25.90 NJ574.00 B60.00 UNJ2.10 BNJ

236.00 U1.00 UNJ

172.00 NEJ1,210.00 NJ

VMA3-0102/16/2000

MBUA0529542S


1,880.00 J179.00 NEJ24.40 NJ65.30 NEJ

72,800.00 EJ26.20 J623.00 BE

2,000.00 *EJ0.11 B20.90 NJ462.00 B

0.68 UNJ2.50 BNJ

269.00 U1.20 UNJ

261.00 NEJ76.00 NJ

VMA3-0202/16/2000

MBWA0629543S


24,800.00 J124.00 NEJ14.00 NJ63.40 NEJ

49,800.00 EJ23.10 J

1,730.00 EJ1,580.00 *EJ

0.2125.40 NJ

1,310.00 B0.69 UNJ1.20 BNJ

274.00 U1.20 UNJ

176.00 NEJ112.00 NJ



04/12/200010:29 AMPage 2



mg/kgnig/ kgmg/kgmg/kgmg/kgmg/kgmg/kgmg/kgmg/kgmg/kgmg/kgmg/kgmg/kgmg/kgmg/kgmg/kgmg/kgmg/kgmg/kgmg/kgmg/kgmg/kgmg/kg

VMA3-0302/16/2000

MBWA0729544S

33,600.00 EJR59. 40 NJ34.50 BNEJ1.00 BNJ0.28 UNJ

5,690.00 J159.00 NEJ22.90 NJ102.00 NEJ

63,800.00 EJ110.00 J

1,130.00 BE1,890.00 *EJ

0.1424.10 NJ

1,330.00 J0.67 UNJ1.90 BNJ

263.00 U1.20 UNJ

220.00 NEJ73.70 NJ

VMA3-0402/16/2000

MBWA0829545S


3,480.00 J146.00 NEJ21.60 NJ63.80 NEJ

58,800.00 EJ89.80 J837.00 BE

1,610.00 *EJ0.09 B20.10 NJ773.00 B0.64 UNJ1.90 BNJ

252.00 U1.10 UNJ

206.00 NEJ70.50 NJ

VMA4-0102/16/2000

MBUA0929546S


3,640.00 J163.00 NEJ26.70 NJ78.10 NEJ

68,200.00 EJ207.00 J

1,040.00 BE2,130.00 *EJ

0.11 B23.00 NJ863.00 B1.40 NJ2.30 BNJ

278.00 U1.20 UNJ

229.00 NEJ79.10 NJ

VMA4-0202/16/2000

MBWA1029547S


104,000.00 J91.10 NEJ11.20 BNJ106.00 NEJ

37,900.00 EJ225.00 J

1,440.00 EJ1,000.00 *EJ

0.1616.50 NJ

1,190.00 B0.63 UNJ0.68 BNJ

249.00 U1.10 UNJ

128.00 NEJ90.10 NJ

VMA4-0302/16/2000

MBWA1 129548S


5,250.00 J120.00 NEJ22.90 NJ132.00 NEJ

47,800.00 EJ1,250.00 J732.00 BE

1,710.00 *EJ0.14 B18.30 NJ631.00 B

1.10 BNJ1.80 BNJ

308.00 U1.40 UNJ

179.00 NEJ76.60 NJ

VMA4-0402/16/2000

MBWA1229549S


4,900.00 J141.00 NEJ18.50 NJ56.40 NEJ

55,000.00 EJ51.70 J858.00 BE

2,170.00 *EJ0.2223.50 NJ530.00 B0.69 UNJ1.80 BNJ

272.00 U1.20 UNJ

183.00 NEJ74.00 NJ

COoovx>toen

u>oo\oU)o\



04/12/200010:29 AMPage 3



mg/kgmg/kgmg/kgmg/kgmg/kgmg/kgmg/kgmg/kgmg/kgmg/kgmg/kgmg/kgmg/kgmg/kgmg/kgmg/kgmg/kgmg/kgmg/kgmg/kgmg/kgmg/kgmg/kg

VMA5-0102/16/2000

MBUA142955 1S


62,900.00 J95.20 NEJ12.00 BNJ50.30 NEJ

40,600.00 EJ18.80 J

1,420.00 EJ1,130.00 *EJ

0.1419.60 NJ864.00 B0.68 UNJ0.84 BNJ

269.00 U1.20 UNJ

131.00 NEJ93.00 NJ

VMA5-0202/16/2000

MBWA1529552S


11,100.00 J146.00 NEJ14.80 NJ49.00 NEJ

60,200.00 EJ11.90 J

1,440.00 EJ914.00 *EJ0.1727.70 NJ746.00 B0.66 UNJ1.70 BNJ

260.00 U1.40 BNJ

203.00 NEJ62.20 NJ

VMA5-0302/16/2000

MBWA1629553S


6,640.00 J175.00 NEJ18.30 NJ63.50 NEJ

63,900.00 EJ15.60 J

1,170.00 BE1,860.00 *EJ

0.1728.00 NJ507.00 B0.76 UNJ2.40 BNJ

302.00 U1.30 UNJ

216.00 NEJ90.50 NJ

VMA5-0402/16/2000

MBUA1729554S


7,350.00 J127.00 NEJ14.40 NJ61.10 NEJ

50,300.00 EJ243.00 J

1,420.00 EJ1,570.00 *EJ

0.2023.40 NJ784.00 B0.69 UNJ1.50 BNJ

274.00 U1.20 UNJ

157.00 NEJ85.60 NJ

VMA5-0502/16/2000

MBWA1829555S


76,300.00 J124.00 NEJ13.60 BNJ62.40 NEJ

47,200.00 EJ17.80 J

1,620.00 EJ1,950.00 *EJ

0.2424.90 NJ794.00 B0.73 UNJ1.20 BNJ

290.00 U1.30 UNJ

174.00 NEJ112.00 NJ

VMA1-BG02/16/2000

MBUA0229539S


35,900.00 J84.00 NEJ9.40 BNJ53.20 NEJ

33,300.00 EJ49.50 J988.00 BE701.00 *EJ0.11 B14.70 NJ514.00 B0.79 UNJ0.79 BNJ

311.00 U1.40 UNJ

122.00 NEJ48.60 NJ

WOO10CO



04/12/200010:29 AHPage 4



dig/kgmg/kgmg/kgmg/kgmg/kgmg/kgmg/kgmg/kgmg/kgmg/kgmg/kgmg/kgmg/kgrag/ kgmg/kgmg/kgmg/kgmg/kgmg/kgmg/kgmg/kgmg/kgmg/kg

VMA4-BG02/16/2000

MBWA1329550S


241,000.00 J26.00 NEJ3.30 BNJ17.60 NEJ

11,400.00 EJ21.60 J

1,160.00 BE236.00 *EJ

0.08 B8.50 BNJ

487.00 B0.66 UNJ0.48 UNJ

261.00 U1.10 UNJ45.90 NEJ31.20 NJ

VMA5-BG02/16/2000

MBWA1929556S


162,000.00 J30.90 NEJ4.60 BNJ28.30 NEJ

14,600.00 EJ11.80 J

1,240.00 BE539.00 *EJ

0.06 U8.10 BNJ

520.00 B0.65 UNJ0.48 UNJ

257.00 U1.10 UNJ48.60 NEJ35.20 NJ

MAY 2000 SURFACE SOIL RESULTS

300938

TRANSMITTAL MEMO

To: Andrew Confortini, OSCRemoval Action Branch, U.S. EPA Region n

From : Doel MirandaSTART Region H

Subject: V&M/Albaladejo Farm SiteSampling Trip Report and Laboratory Results

Date: June 23, 2000

The purpose of this memo is to transmit the subject mentioned report. If you have any questionsplease call me at (787) 724-2920.

cc: START SITE FILE TDD#: 02-00-04-0012PCS#: 6798

300939

SAMPLING TRIP REPORTLABORATORY RESULTSV&M/Albaladejo Farm Site


Site Report

Site Name: V&M/Albaladejo Farm

EPA CONTRACT NO: 68-W5-0019

TDD NO: 02-00-04-0012

DCN NO: START-02-F-04435

Task: 03

Sampling Dates: 3O - 31 May 2000

^^ Site Location: Almirante Norte WardVega Baja, Puerto Rico

Sample Locations: Refer to maps 2 and 5

Sample Descriptions: On-site XRF and Laboratory soil sampling results

1.0 Background

The V&M/Albaladejo Farm Site is located west of Kilometer Marker 4.2 Road 160, in Vega Baja,Almirante Norte Ward, Puerto Rico (See Attachment A Site Map). The site is located in a sparselypopulated rural area; the nearest residents are located within one mile of the site. The site consistsof an undetermined number of acres characterized by rugged terrain. In the past, a small pineappleplantation was in operation on the V&M Farm location.

The contamination at the V&M/Albaladejo Farm Site was the result of previous use as a dump andburn site. Trucks were reportedly observed on the site carrying wastes composed of plastic coatedelectrical cables, electrical equipment, and car batteries. The plastic coating of these wastes wasburned to recover the copper, aluminum and lead. It is unknown when the dump and burn operationsbegan. Waste burning operations on the property continued until 1988.

300940

There were four exposed burn areas on site with green-stained and/or darkened soil. These greenstains were caused by chemical reactions of wastes and sulfuric acid which leaked from car batteries.The burn area also contained exposed remains of electric cables, car batteries, plastic and ashes.

— During heavy rainfall, run-off from the burn areas drained in the general direction of nearby sinkholes; these sink holes are connected to underground aquifers which serve as a drinking water supplyfor residents on the northwest area of Puerto Rico, through the Puerto Rico Aqueduct SewerAuthority (PRASA). Other than heavily overgrown vegetation, access to the site was unrestricted.

Based on observations made by EPA and START during site visits in 1989 and 1996, it appearedthat there were four burn areas: Zones 1,2,3 and 4. A site visit conducted by EPA and START on13 January, 1997, identified the location of a sinkhole which received run-off water from Burn Area4.

On 28 January 1997 an additional field survey was conducted on Burn Area 4.

From 5 January through 27 January 1998, an additional soil sampling event was conducted in orderto delineate the vertical lead contamination in all the areas of the site .

Excavation to remove contaminated soil began on 26 January 1998 and continued until 24 March1998.

On 28 February 1998, another soil contaminated area was found near Zone 2. Samples from thisarea were identified as NA (for new area). The contaminated soil in this area was also removed.

^, 2.0 Sampling chronology and description

On 30 May 2000, EPA and START mobilized to the site to begin sampling activities to confirm thatthe removal activities had removed all contaminated soils. Samples were collected from Zones 2and 4. (See maps 2 and 5) and screened using a Spectrace Model 9000 X-ray fluorescencespectrometer prior to transfer to a lab for lead analysis.

On 31 May 2000, START demobilized from the site.

3.0 Analysis results

Results of all field XRF analysis and the validated laboratory results are detailed on Table 1.

The laboratory results correlate well with the XRF Screening except for sample VMA4-3D (XRFresults; 346 and 359 ppm, lab result; 3130 J ppm)

300941

Table 1.

Results of XRF analysis of samples for VM/Albaladejo site

30 - 31 May 2000

KEY TO TABLE

Samples were labeled VMA-X-Y-Z where VMA stands for V&M/Albaladejo, X stands for thecleaned up confirmation area where the sample was collected from, Y specifies the specific samplesequential number, and Z stands for supplementary sampling at 180 degrees from Y sampling point.

MS/MSD -QC samples to for the lab to provide a quantitative measure of the analytical precision and accuracy, asapplicable.

DUP - Duplicate Sample

REP - Replicate (XRF analysis was repeated)

300942

VMA2-2A

VMA2-2B

VMA2-2C

VMA2-2CDUP

VMA2-2D

VMA2-2DMS/MSD

VMA4-3A

VMA4-3B

VMA4-3C

VMA4-3D

VMA4-3DREP

VMA4-3-D1

VMA4-3D2

VMA4-3D1DUP

VMA4-3D2DUP

VMA4-3D2REP

30 May 2000

30 May 2000

30 May 2000

30 May 2000

30 May 2000

30 May 2000

30 May 2000

30 May 2000

30 May 2000

30 May 2000

30 May 2000

31 May 2000

31 May 2000

31 May 2000

31 May 2000

31 May 2000

18

-9.6

-2.9

13

19

-59

14

159

136

346

359

143

305

101

265

371

:"" "'V:' •'•'-"•" -V?rV. • * •- *5r • ^-j^y^g'jg*-

29.3 J

25.8 J

20.3 J

22.6 J

22.4 J

—

46.2 J

117J

161 J

3130J

—

95.5 J

—

—

—

—

300943

JUN-14-2030 14:39 USEPfl-2 ERRD

IHORGUTIC ANALYSES DATA SHEET

1 212 637 4284 P.02/12i

89A SW^PLB VO.

Lob CK8M contract =DOT

Coda i LXBRTY

Matrix (•oil/tracer)

Lev«l (lenr/nwd) :

C«ae tto. SAS NO-: _____ SDG No.J

Lab Sample ID: QI&41-10

Data Received: 06/01/00

100.0

Coucentration. ftuts (ug/L er mg/kg dry weight): HG/KG 1.

CMS SO.

7439-92-1

AnalyteLead ___

Concentration22. 6

C Qg f

M

P

Color Before:

Tolor After:

BROHK__

YELLOW.

Clarity Before:

Clarity After-.

iTexture: | MEDIUM

Artifact a(t

FORM I - IN ILM04.D

9

FORK I - IN LM04.010

300944

JUN-14-2000 14=39 USEPfl-2 ERRD

IHDHGWJIC ANALYSES DATA SHEET

1 212 637 4284 P.03/12

EPA SAMPLE NO.

Lab CONFBCHBN_

ib Code: LIBRTY

Contract:2B

SAMPLE

—— T-I

C*8e No. : _____ SAS Ho. : _____ SOG Ho.j

Matrix (•oil/water): SOIL_ L*b Sample ID: Q1^41-2

Level (low/VMd) : LOW__ Date Received: 06)^01/00

* Solid*: 100.0

CXmceatration Units (ug/L or tog/kg dry weight) : MG/KG

CA3 No.

7439-92-1

Aimlyce

LeadConcencratloa

25.8

C Q^L J3^

M

p

Before: 8ROWW__

rolor After: YBLLOW_

ononents:

Clarity Before:Clarity After:

FORM I - IN

-t

Texture:Artifaces

MEDIUM

ILM04.Q

300945


INORGANIC ANALYSES DATA SHEET

1 212 637 4284 P.04/12

C9A SAI^LE NO.

Lab Name: COMFUCHBM

.*b Code: LIBRTY

Contract::2C j

Cat* No.

Matrix (soil/watar): SOIL_

L«vel (low/ned) : LOW_

% Solid*: 100.0

SAS No.: 3DG NO.

Lab Sample ID: Ql

Date Received: 06

Concentration Unite (ug/L or ng/kg dry weight) : M6/XG

Q13*1_

41-3

'01/00

CA3 No.

7439-92-1

AnftlytaLead

Concentration20.3

C Q_ s_^r

M

P_

roior Bczoxe: BROWN •

rolor After:Clarity Before:Clarity After:

Texture: I MEDIUMr

Artifact*

FORM I - IN ILM04.0

300946

JUN-14-2000 14=39 USEPPl-2 ERRD

1KORGAHIC ANALYSES DATA SHEET

1 212 637 4284 P.05/12\

Lab Name: Contract:

SWLE NO.

ib Code: LIBRT* Ca>« Ho.

Matrix (soil/waterJ: SOIL_Level (low/cwd): LOW__

\ SolidS: 100,0

5AS NO. SDG Ne.

Lab Sample ID; QDate Received: 06 01/00

1

Concentration Units (ug/L or mg/kg dry weight): M6/K6_

CHS No.

7439-32-1

AnalyteLead

-

Concencracioa22.4

C Q_ B y

K

7

rolor Before: ^

:olor After: YELi,OW_Clarity Before:Clarity After;

Texture:

Artifacts:

MEDIUM

FORM I - IH

300947

JUN-14-2000 14=39 USEPfl-2 ERRDw. si. urn

IBORGANIC ANALYSES CATA SHEET

1 212 63V 4234 P.26/U

BPA SAN LB BO.

HatM:

Code:Matrix (soil/water): SOIL.

Contract::3A

He.

% Solids .- 100.0

SAS No.: _____ SDG Ho.:1

Ub Sample ID: 01311-5Date Received: 06/31/00

iiconcentration units (ug/L or &g/kg dry weight): MO/KG__|

C&S Ho.

7439-92-1

•

AaalyteLead

Ccncaatration4«.2

C 0S ^f

H

P

:olor Before: BROWNI

:olor After:

Clarity Before:

Clarity Altar:

Texture -.

Artifacts:

IUM

Bocnts: ii

FORM I - IN It (04.0

H

300948

JUN-14-2000 14=40 USEPfl-2 ERRDv,o, - CLP


1 212 637 4284 P.07/12

SPA SAB PUB 80.

Lab Name: COWF0

ib Code: L1BRTY

Matrix (soil/water): SOIL.

Level (low/mod): W*_

% Solido: loo.o

Contract:3B

No.: SAS NO.: SDG No.t

Sample ID: Ql0*te Received: 06

41-6

01/00

I

Concentration Unite (ug/L or mg/kg dry weight) : MS/KG j1

CAS No.

743S-W-1

AnalytcLead

Concentration117

C

_^

Q

ITTM

P

M»

:olor Before:

:olor After: YELLOW


FORM I - IK

Texture: MEDIUM

Artifacts:

I W04.Q

300949


BfORGAHIC ANALYSES DATA SHEET

1 212 637 4284 P.08/12

EPA SAMM* NO.

Lab Name: CCMPuCHEM Contract:3C

' 1 ' 'i1i

Jb Cede- LIBRTY Case No.

Matrix (soil/water): 3OIL_

Level (low/med): LCH_

* Solid*: 100.0

<3A£ So. : SDG NO . :

Lab Sample 19: Q13I1-7

Dace Received: 0«/ )l/OD\

concmntracicoa Units (ug/L or mg/kg dry weight): MG/X6__

CA3 No.

7439-92-1

AnalyteLead

Concentrationid

c Q

5 i

•

M

P

Before; BROWN_

:olor After:

?oim«enta:


Texture:

Artifact*: !

FORM I - IN

IUM

I *04.016

300950



1 212 637 4284 P.09/12i

EPA SAI PLB MO.

Lab Name: Contract:30

Coda: LIBRTT Ca»» No.

Matrix (soil/water): SOXL_

Leva! (loWnadJ s LOW_mV Solids: 100.0

SAS No.: tSDG NO.V Q1341_

Lab Sample ID: Qliii-fiDate Received: 06(01/00

It

Concentration Units (ug/L or mg/kg dry weight) : MS/KG_\t

GAS No.

7439-92-1

AnalyteLead

Concentration3130

c QB T"

M

P

:oler Before; BROWN••«•

lolor After: YELLOW

Clarity Before:

Clarity Afters

Texture:

Artifacts:MEDIUM

FORM I - IK I3M04.0

17

300951

JUN-14-2000 14:40 USEPP-2 ERRD


1 212 637 4284 P.10/12i

SPA

Lob Kara*: COMPOCBEH

ib Code: LIBRTY Case No-:Matrix (eoil/wacer): SOIL.

Level (Icw/raed): uow__% Solide: 100.0

Contract:

S&S N<

SAMPLE BO.9

301 \

SOG NO.:

Lab Sample ID: Qi: 41-9Date Received; OS/01/00

Q1341

Concentration Unit* ta9/L or mg/fcg dry weight): MS/KG__j

!olor Before: BROWN f^ff

•olor After: YSLLOW,

cmmenta:


FORM I - IN

CAS NO.

7433-92-1

•„«•

AnalyteLead^

Concentration95.5

•

c Q

-«-r -«lt

M

P

Texture: 3IUM

II 104.0li

300952

r\i,-t\roin<r>ooco

JUN-14-2000 14=41 USEPfl-2 ERRD 1 212 637 4284 P.12/12

ZONE M 0BURN ARCfli* "

.' s-a s-s

HOT TO SCAlT -

Roy F. w«»*on. me.PROGRAMS DIVISION

te. JCTW1MI Ic . .«.£. 'MMI2B* AiJOOtltt. MO 98

MC..JtHICES

. CUB SAKPU LOCATIONS ronOEXN UP CONTOUAT10N

VfcM - AIBAUBCJOPPBTTO RICO

US IB1QVAL ACT10H BRAKC8

*«M BY . J. HMt»TM JM. - Eft.

Br»3TMT M04CT

300954TOTQI P. 12

TOTfiL P.12

APPENDIX CSOIL BORING LOGS

300955

BORINGJOB NUMPROJECTLOCATIODATE OR

DRILLINC

-C _ _

a ca

2-

4-

6-

8-

10-

12-

14-

16-

18-

*JAMF MW-01: OVERBURDEN RPni ofiiqi Kent HankinsonRFR 7720-086 HRTI i MFTHnn Hollow stem auger

VSM/Albaladeio farms CIAMPI F MFTHnn Split spoonN Vega Baia, Puerto Rico rnTAi HFPTH 20 feet below ground surface (bgs)Ti i Fn 2-3-98 SURFAHF FI FVATTfiN 222.317 feet mean sea level (msl)

3 COMPAN

6zOJaiCO

SS-I

SS-2

SS-4

SS-5

SS-6

SS-7

SS-8

SS-9

Y Soil Tech nFPTH Tn RRniiNnwATFR 148.43 feet bgs

v>11CD 0

6710109799101065613109101077

81126323050

Samp

leIn

terv

al0-2

2-4

4-6

6-8

8-10

10-12

12-14

14-16

> 0)0 0)0 ~<u —<r

NA

NA

NA

NA

NA

NA

NA

NA

ilBkg

Bkg

Bkg

Bkg

Bkg

Bkg

Bkg

Bkg

Lith

olog

y

jtii

Tl —— r

1 1 1

1 1 1

1 1 1

1 1 1

P^

1 1 11 1

1 1 1

, 1 , 1 rI 1 I1 1

1 1 11 1

1 1 11 1

I 1 11 1

Description

CLAYEY SILT, dark brown (7.5 YR 3/2), stiff, low plasticity, novisable contamination, no chemical odor, dry. pH=7

Same as above except rock (limestone) fragments within. pH=7

•

SAND and LIMESTONE, pink (7.5 YR 7/3). Sand; loose, subangular,poorly sorted, very fine to coarse grained, no visable contamination,no chemical odor, dry. pH=7

Same as above.

No recovery.

SAND AND LIMESTONE, pink (7.5 YR 7/3) sand; loose, subangular,poorly sorted, very fine to coarse grained, no visable contamination,no chemical odor, dry. pH=7

Same as above.

-

20 —————————————————————————————————————————————— ———— ——

COM FEDERAL PROGRAMS CORPORATION 300956

BORINGJOB NUMPROJECTLOCATIODATE DRDRILLINC

.c ___

Q ~

2-

4-

8-

10-

12-

14-

18-

MAMF MW-2: OVERBURDEN RFHI nRTqi Kent HankinsonRFR 7720-086 nRTi L MFTHnn Hollow stem auger

VSM/Albaladeio farms C;AMPI P MFTHnn Split spoonN Vega Baja, Puerto Rico TnTAi nFPTH 30 feet below ground surface (bgs)T I IPP 2-12-98 qiiRFArFFiFVATinoj 195.190 feet mean sea level (msl)

3 COMPAN

6z

a

in

Y Soil Tech nFPTH Tn RRniiNnwATFR "4.55 feet bgs

V>

SIm o Sam

pleIn

terv

al0-2

2-4

4-6

6-8

8-10

10-12

12-14

14-16

16-18

18-20

O 0}0 *;<U<r

100%

66%

75%

66%

75%

83%

75%

66%

83%

75%

ilBkg

Bkg

Bkg

Bkg

Bkg

Bkg

Bkg

Bkg

Bkg

Bkg

Lith

olog

y

— — — — _~-r"-T"_r_rT" T_ _ _ _ _E-E-ErEI-E_ _ _ _ _i i i_ _ _ _ _~~~——m m m_ _ _ _ _

LiLii~jr-_r-T"_rm m m

I-" -1-"Z-"_

1 1 1

E~~

rlrirlrm m m

n_"-L"Z."Zl

z.i_in.~=" =" =" =~i i iz.inr_.~i

~™r

.~i-"i."n_~• • •

L."Z-"1."_.~

3." ." ." ."

^^L

\ 1 1l l1 I 11 1l l l

Description

CLAY, strong brown, high dry strength, no dilatancy, high toughness,no sand, stiff, moist, (7.5YR 5/8). some black ORGANIC MATERIAL,ROOTS etc., no odor, no contamination.

Same as above except increased LIMESTONE (GRAVEL to fineSAND).

Same as above except CHARCOAL present.

Same as above.

Same as above except less CHARCOAL and pink mottling present.

Same as above except becoming pinkish white (7.5 YR 8/2),weathered LIMESTONE.

20- ————————————————————————————————————————————————————————— ——— — -


RHRTNR NAMF MW-2: OVERBURDEN

.mR NIlMRFR 7720-086

pRfUFrr VSM/Albaladejo farmsi nrATTDN Vega Baja, Puerto RicoriATF nRii i FD 2-12-98nRTi i TNR COMPANY Soil Tech

RFni CIRTST Kent HankinsonHRTI i MFTHnn Hollow stem augerSAMPI F MFiwnn Split spoonTriTAi nFPTH 30 feet below ground surface (bgs)qiiRFAPF FI FVATiriN 195.190 feet mean sea level (msl)nFPTH in RRniiKinwATFR 1 .55 feet bgs

0. 3±flj — •Q

22-

24-

28-

28-

30-

32-

34-

36-

38-

An-

6z<Ua

en

ifm o Sam

pleIn

terv

al20-22

to ^I fiID ' —

DC

83%

II

Bkg

Lith

olog

y

1 / ' '. 1 . 1 .1 1 1

1 11 1 1

1 11 1 1, .1 1f 1 1

Description

LIMESTONE, 90% limestone and 10% CLAY, massive, fractured, dry.

-

No sample beyond this depth.

-

-

-

-

-

-

-


BORINGJOB NUMPROJECTLOCATIO

DATE DRDRILLING

.c ^__Q.HD —a

2-

4-

6-

8-

10-

12-

14-

16-

18-

VJAMF MW-3 Rpm nniqi Kent HankinsonRPR 7720-086 nun i MF-mnn Hollow stem auger

VSM/Albaladejo farms SAM^I F MFTHnn Split spoonN Vega Baia. Puerto Rico TOTAI HFPTH "5 feet below ground surface (bgs)11 1 pn 2-16-98 qiiRFAHF FI FVATTDN 173.761 feet mean sea level (msl)

3 COMPAN

6z0)Q.

ien

Y Soil Tech RFPTH Tn RRniiNnwiTFR 85.25 feet bgs

<f>

11m o Sam

pleIn

terv

al0-2

2-4

4-6

6-8

8-10

10-12

12-14

14-16

16-18

18-20

>.iu —> u0 0)o ;*-CDcc

toox

66X

50%

83X

83X

75X

75X

83X

75X

83X

•3 EZ ai .£

Bkg

Bkg

Bkg

Bkg

Bkg

Bkg

Bkg

Bkg

Bkg

Bkg

Lith

olog

y

_ _ _ _ __ _ _ _ _

E!-Z~:_

"•£-_:£

ririrG'ir

_ _ _ _ _

r!r!?!r-!r~~~~^2m m m

££•£—

.— .— .-

rGG-!rir

£:£!£;£•£

r3-3I_-!r• • ••—• . _' - .

Z."I_"I_~1."Z

£££—

r_r-r.r"-r_--rr-r_:

. T^--. ~. '

— _^-_^-_^-_^_ _ _ _ __ _ _ _ _"._"-_"-_"—

~-_"-T"-_^_

Description

CLAY; Strong brown (7.5 YR 5/6), high dry strength, little sand, nocontamination, stiff, moist. pH=6

Same as above. pH=6

Same as above. pH=5.5

Same as above except increased charcoal and some red mottling.pH=5.5

Same as above with increasing sand with depth. pH=5.5

Same as above. pH=6

Same as above with increase in sand content to 10X. pH-6

Same as above.

20- —————————————————————————————————————————————————————————————————— ———— ———


BORING NAMF HW-3 Kent HankinsonJOB NUMRFR 7720-086

VSM/Albaladejo farmsDRILL MF-mnn Hollow stem auger

i nrATinisi Vega Baja, Puerto RicoSAMPLE MFTHnn Split spoon

DATE nRTi i Fn 2-16-98DRILLING r.nMPANY Soil Tech

TOTAL nFPTH 115 feet below ground surface (bgs)SURFACE PI FVATTDN 173.761 feet mean sea level (msl)DEPTH TO FiRniiNnwATFR 65.25 feet bgs________

4) —a

0)aIDtn

|§£ 2i o Do i—

O)oo Description

22-1

26-

28-

30-

32-

34-

36-

38-

40-

20-22

22-24

24-26

26-28

28-30

30-32

32-34

34-36

36-38

38-40

66%

83X

75%

100%

100%

83%

100%

100%

100%

83%

Bkg

Bkg

Bkg

Bkg

Bkg

Bkg

Bkg

Bkg

Bkg

Bkg

Same as above with decreasing red mottling. pH=6

Same as above except decreased red mottling, charcoal and sand to5%. pH=8

SILTY CLAY, strong brown (7.5 YR 5/6). high plasticity, high drystrength, charcoal present. pH=6

Same as above.

Same as above except a decrease in sand to 2%, pH=6

Same as above.

Same as above.


RflRTNG NAMF MW-3

.inn NIJMRFR 7720-086pRn.iFHT VSM/Albaladejo farmsi nrATTriN Vega Baja, Puerto RicoruTF HRII i pn 2-16-98nan i INK HHMPANY Soil Tech

RFDI nRTRT Kent HankinsonnRii i MFTHnn Hollow stem augerSAMPI F MFTHnn Split spooninTAi nFPTH 115 feet below ground surface (bgs)tuiRFATF FI FVATinN 173.761 feet mean sea level (msl)nFPTH Tn RRnnwnwATFR 85.25 feet bgs

c.ssa

42-

44-

46-

A Q

50-

9£

3*»

56-

58-

on

6(Ua.icn

<rt

liCD 0 Sa

mple

Inte

rval

40-42

A O A A

44-46

50-52

55-57

>.OJ ~> mO QJ0 ^11

QC

100%

75%

75%

OA¥

100%

^1z s

Bkg

Di\y

Bkg

DLn

Bkg

Lith

olog

y

• • •

3_"I_~U~Lr!l

zjn." ."!."!3.T.1."I.~

I-"I-"I-"I.~

r.i.i.'T.—~ "~ ~~ ~~ ~~

5-32-33

r"-T".r rvr

~jTJT-rr!rCr3E

Z~E~_ _ _ _ _£-£-3E}£

r T ii i

i ii ii . i . . ]i ir-rrvrl:

I . I . Ii i

E"£"E!"Z"E

Description

Same as above except some coal present. pH=6

Same as above but red mottling present. pH-6

Same as above.

-

CLAY, like above, w/LIMESTONE, tan and pink, 90% CaC03, 10% CLAY,massive, no fossil, fractures, or vugs, dry.

LIMESTONE (30%), fragments mixed w/CLAY (70%), limestone is tanonly.

-


RDRTNfi NAMF MW-3

JHR NUMRFR 7720-086pRn.iFDT VSM/Albaladejo farmsi nrATTfiN Vega Baja, Puerto RicoDATF flRll 1 FH 2-16-98

DRTI i INK rriMPANY Soil Tech

RFni DR7ST Kent HankinsonHRII i MFTunn Hollow stem augerSAMPI F MFTwnn Split spoonTDTAI DFPTH "5 feet below ground surface (bgs)qiiRFArp FiFVATTriN 173.761 feet mean sea level (msl)nFPTH rn RRniiNinwATFR 85.25 feet bgs

£ — •a

f t * ) !

64-

66-

68-

70-

72-

74-

/O"

d

O.

icn

en

11ca o

11 IDQ. >12cn £

60-62

65-70

70-75

75-80

Rec

over

y(fe

et)

50X

32X

98X

100X

•s "i

Bkg

Lith

olog

y

1 1 ^1 11 1 11 11 1 11 1i i i

T 1 11 1 1

1 11 1 11 1

1 1 1

T-^T.•.•^.:.'.-^.:.'\ : \\ : \: :\:: :\:-:\ : ' :A : ' :A

• : \.: •' .• \.: :•f : ' :A : ' vt: .• '|.: : / .: .t: ::A: 'A: • ,- : • j.: .-\ : A A: :\. : :^. : .t : A : 'A: :^.: •':].•:i : : :A : A: .•].'•: .-.)•. ::t: ':A: ':A: : \.: : .• \.: :\ : ' :A : ' :A:.•['•: .-.j-.:. ••f : '-A: :A: : Jv : .• \.- :t: 'A M•' .•\.: '\.: •'I: A 1: .'^." .'}. :t : 'A: A•'.'}.''•' ,'\.:-'^ : :. I A.- • i '• : • .(- : .-•t : ' vt : ' '-A: : |.: ' -\.- :.>:•:)::>fiMi •:;•••< •:,'••*T^Ti''H'*':i••'4:--'4:--'-t;'j:-t ;•;:••!:.-*.•:.•%.•:liiiimm; •' \- \- :

|,-i:'!-:,v}•' -i: • - - ( - : •

Description

LIMESTONE, as above, with V wide CLAYEY LIMESTONE, weathered,lens/ stringers.

SANDY LIMESTONE, tan, medium friable, little moldic porosity, fewvugs, dry, no visible contamination, fossiliferous, strongly weathered,30X sand, 70X limestone.

-

SANDY LIMESTONE, pink and white, (20X sand, 80X limestone).consolidated to friable (medium), strong to medium weathering.fossiliferous, moldic porosity, no visible contamination.

~

SANDY LIMESTONE, pink, brown and white, (30X sand, 70Xlimestone), consolidated to friable (medium), strong to slightweathering, fossiliferous, 20X moldic porosity, no visiblecontamination.


BORING

JOB NUM

LOCATIODATE DR

DRILLING

^ _a Ca> —a

82-

84-

86-

88-

90-

92-

94-

wv

AQ

SJAMF MW-3 RPn| nmqT Kent HankinsonRFR 7720-086 nRii i MFTHOO Hollow stem auger

VSM/Albaladejo farms ^AMPI F MFTHnn Split spoonN Vega Baja, Puerto Rico TDTAI RFPTH 115 feet below ground surface (bgs)TI i FD 2-16-98 qiiRFAPF FI FVATTPIN 173.761 feet mean sea level (msl)

3 COMPAN

6•z.<oa

Y Soil Tech PFPTH Tfi GROUNDWATEP 85.25 feet bgs

V)

II00 0 Sa

mple

Inte

rval

80-85

85-90

90-95

95-100

S ~•> o>o o>0) "~"cc

77%

87%

100%

100%

il

Lith

olog

y

1 1 11 1 11 1 1

1 11 1 11 1 1

1 11 1 1

1 11 1 1

1 11 1 1

1 11 1 1•t : ' vt : ' :.-t.'.•jr:.' |v't : ' -A : vt.•'.'Iv.-.-jv.-1

t : ' A : :A.'.i: . .1: .•

t;'^t;j:.t1 • .: 1 1

Ppf

: :\.:: .•}/.•'•t :' ' :. t : : :.'l.•'.• jv.v jv.' .•t :' ' vt : ' vt.•'.•:jv:'.- J-.;:'t : ::A: . vt.• .- iv .• .• v .| - - ' { : • : |

.•'• j:.''-i: •'¥^:'.-^.:: ;\.::'•\ : ' vt : A• • . [ • • • • - ( - • ••t : ' vt : ' :.-t.•'.•^-.:; ,-:|v.-'t: .':.i: 'vt

-• :).''-' .' \'.: *i: :t: :.f' • | : : • 1 '• 't;;':-tO:-ty?, y ?• y

; • . ) • • . • •:)•.:.•

•f : ' vt : : vl: 'l/.-.-i/:t : ' v[ : ' vt•' •1l'-:; ' T- : /

t : :.t : ' vt: :\.:: :k:i : A: :-A:':\.:: :}.•:'.1 : :.1: ''-A.•.•f.::.-f.;:^ : ' H : :.-t: .' \.'-' .'^.••'•t : ' vt : A• •' P ''l ••t : ' vt : ' vt• • | - • •['•

Description

LIMESTONE, pink and white, (100% limestone), consolidated, localizedweathering, fossiliferous, 40% moldic porosity, no visible contamin-ation.

LIMESTONE, white and brown, (40% sand. 60% limestone), semiconsolidated to friable, medium to strong weathering, fossiliferous,20% moldic porosity, no visible contamination.

SANDY LIMESTONE, grey to white, (25% sand, 75% limestone), friable,strong weathering, fossiliferous, 10% moldic porosity, no visiblecontamination.

SANDY LIMESTONE, green-grey to black. (45% sand, 55% limestone),very friable, strong weathering, fossiliferous, 40% moldic porosity, novisible contamination.

100- —————————————————————————————————————————————————————————— ——— —— —— —— -i


BORINGJOB NUM

LOCATIODATE DRDRILLINC

^

Q ~"

102-

104-

106-

108-

110-

112-

114-

116-

118-

VJAMF MW-3 Rdni DRTC;T Kent HankinsonOFR 7720-086 HRTI i MfTHnn Hollow stem auger

VSM/Albaladeio farms SAMPI F M^THnn Split spoonN Vega Baja, Puerto Rico TOTAI OPPTH '15 feet below ground surface (bgs)TI i pn 2-16-98 qiiRFirp FI FVATION 173.761 feet mean sea level (msl)

5 COMPAN

o

uQ.

iCO

Y Soil Tech riFPTH rn RRniiNnwATFR 85.25 feet bgs

tfl

II00 0

11 (0a >

100-105

105-110

Rec

over

y(fe

et)

90%

100X

68X

II

Lith

olog

y

1. 1 . 1 .

11 1

1 11 1

:T^'t : . A : : A

1 11 1

1 11 1

1 11 1

-,;44:':^.:: :•[.'•:.•f : ' '-A : ' L.l; .^-:; •.).:.•

• :' ' vt : • ':i: : -|v : : i.: :

H'H'ii : i ' . : 1

FW• • } ; • \ : •4 : :. I : vl•' ' \ ' • •' I ; •'-1 : ' vf : ' '-A.•.••Iv.'.-^v-•f : ' :.-t : ' A: : \.: •' \.- :1: ' .1 -A-' :\.: • :\.' '1 : ' :A : ' A: :\.:: :\::i : :A : A: .-^.'-: .--j-.v".•I : ' :A : ' :A.•-.).:.- .-.jr.•t:' ''A: :A- • \'.' ' : \.' •J: A: A• .'\.: •' .' \.: •\ f ]' i :.' ']~ '

Description

LIMESTONE and SANDY LIMESTONE, tan and grey, (sandy LS is 30Xsand), consolidated to friable, tan sandy LS is strongly weathered,fossiliferous, 10X moldic porosity, no visible contamination.

SANDY LIMESTONE, white and tan, (30X sand, 70X limestone), semi-consolidated to friable, strongly weathered, fossiliferous, 30% moldicporosity, no visible contamination.

SANDY LIMESTONE, white, (50X sand, 50X limestone), very friable,strongly weathered, fossiliferous, 40X moldic porosity, no visiblecontamination.

120- ————————————————————————————————————————————— —— — -


BORING MAMF MH-4B: OVERBURDENJOB NIIMRFR 7720-086 ________

Kent HankinsonDRILL MF-mnn Hollow stem auger

VSM/Albaladejo farms Split spoonVega Baja. Puerto Rico

SAMPLE METHOD-TOTAL riFPTM 25 feet below ground surface (bgs)

DATE nun i FO 1-26-98 SURFACE FI FVATTON 241.504 feet mean sea level (msl)DRILLING HDMPAMY Soil Tech DEPTH TO RRniiMnwATFR '74.86 feet bgs

O

a.e10

CO

IIm o c/j £

<D ~> mO £

0) ~~<£

Ea.-

O)OO Description

2-

4-

6-

8-

10-

12-

14-

16-

18-

20-

34574458286II47II

3048152024282017301550

50

0-2

2-4

4-6

8-8

8-10

10-12

12-14

14-16

55%

75%

50%

75%

75%

50%

4/12"

5/5"

Bkg

Bkg

Bkg

Bkg

Bkg

Bkg

Bkg

Bkg

i . i . i

rrrt

ROOT ZONE, CLAY, strong brown (7.5 YR); no sand, roots present, noroot holes, stiff, moist, no dilatency, high toughness. pH=6.5

Same as above, CLAY (CH), no roots, moist. pH=6

CLAY (CH) Same as above, LIMESTONE; Hard, pale yellow (2.5 YR),fine grained, sample too broken to see jointing, thinly bedded ifpresent, silty vesicular (19u), non weathered strong calicifiation, dry,trace iron staining. pH=6

Same as above.

Same as above, w/LIMESTONE, highly fossiliferous.

Same as above, w/LIMESTONE. Increased moisture and weathering,decreased hardness.

Same as above.

Same as above.

LIMESTONE; no sampling beyond this depth.

1 , 1 , 1I , T~ T

I . I . I

r~r


BORING

JOB NUMPROJECTLOCATIODATE DRDRILLING

n a C<u —a

22-

24-

26-

28-

30-

32-

34-

36-

38-

An—

•JAMF MW-4B: OVERBURDEN Rpni nfiiqi Kent HankinsonRFR 7720-086 HRTI i MFTunn Hollow stem auger

VSM/Albaladejo farms ^AMPI F MptHnn Split spoonN Vega Baja, Puerto Rico TOTAI HFPTH 25 feet below ground surface (bgs)TI i pn 1-26-98 e;nRpAnF FI FVATinN 241.504 feet mean sea level (msl)

5 COMPAN

d

<uaIDcn

Y Soil Tech nFPTH Tn RRmiNnwATFR 174.86 feet bgs

tn

So Sam

pleIn

terv

al

>te -> oj0 110 ^D<r

3 E2 Q.I

Lith

olog

y

1 1 1i i1 1 11 1i i i1 11 1 11 1

1 1 11 1

I I I1 11 1 11 1

I 1 11 1

1 1 1

Description

-


RORTNR NAMF MW-5 Rpni nnTST Kent Hankinson

JOB NUMPROJECTLOCATIO

DATE DRORILLINC

.csio

2-

4-

e-

10-

12-

14-

18-

18-

RFR 7720-086 DRTI I MFTwnn Hollow stem augerVSM/Albaladejo farms <?AMPI F MFTwnn Split spoon

M Vega Baia, Puerto Rico TDTAI FIFPTH '4^ 'ee' below ground surface (bgs)ILLEn -28-98 SURFAP.F FI FVATinw 231.290 feet mean sea level (msl)

3 COMPAN

0zIDQ.E10

<f>

SS-1

SS-2

SS-3

SS-4

SS-5

ss-e

SS-7

SS-8

SS-9

SS-10

Y Soil Tech nFPTH Tn RRniiNnwATFR 13^.87 feet bgs

(A

IIm o

441378137a4334510101047101247895101112581016to19252612282416

HI IDQ. ii "ra «-en £

0-2

2-4

4-6

6-8

8-10

10-12

12-14

14-16

16-18

18-20

>fc ~> <L>O 1)0 ^0) —cc

37%

50%

58%

58%

70%

91%

54%

87%

70%

100%

3 EZ Q.X -9

Bkg

Bkg

Bkg

Bkg

Bkg

Bkg

Bkg

Bkg

Bkg

Bkg

Lith

olog

y

_ . _ . _

z.in."z.~_ _ _ _ _

y ^riririr-ir

~_r"_i"-T".r'_ _ _ _ _Z~£;€;7l~

i_i.~i."z."iy7.— ~Z-1_"7_~1

\}.^

^ _ ^ •— _ _ _ _~~r

[rCrG-3-3_ _ _ _ __M_r_r_r

££££•£_ _ _ _ _

!rlr~!r_ _ _ _ _

5-3-3-2-2

Description

Brown (7.5 YR 5/3) SILTY CLAY, stiff, medium plasticity, no chemicalodor, no visable contamination, dry (CH).

Same as above.

Red (2.5 YR 5/6) CLAY and ROCK fragments, clay is stiff, highplasticity, no chemical odor or visable contamination.

Same as above.

Same as above.

Reddish yellow (5 YR 6/6) SANDY CLAY, stiff, low plasticity, nochemical odor, no visable contamination, dry.

Brown (7.5 YR 5/3) CLAY, stiff, high plasticity, no chemical odor, novisable contamination, dry.

Same as above.

Same as above.

Same as above.

20- ——————————————————————————————————————————————————————————————————————— ——— ——— — i


BORING 1JOB NUMPROJECTLOCATIODATE DRDRILLING

c.si0

22-

24-

28-

28-

30-

32-

34-

36-

38-

An-

MiMF MW-5 RFni nniqi Kent Hankinson3FR 7720-086 nRTi i MEiunn Hollow stem auger

VSM/Albaladejo farms <?AMPI F MFTunn Split spoonM Vega Baja, Puerto Rico TniAi PFPTH '40 feet below ground surface (bgs)11 1 FD -28-98 qiiRFArp PI FVATTHN 231.290 feet mean sea level (msl)

i COMPAN

cizuaiin

SS-II

SS-12

Y Soil Tech nFPTH Tn RRniiwnwATFR '37.87 feet bgs

V>

11m o

50

50

Sam

ple

Inte

rval

20-22

22-24

>.ai ^> uo uO *;0)

OL

2IX

8X

•s Ez a^ S±

Bkg

Bkg

Lith

olog

y

~---

y .<^\i-"7-"i."i.~

V ^i_i.i."i.~5-3-33-35-3-3-3-3

3333-3r"-T"_r nr

5-3-33-3

53-333

53-33-3IJUUI^I.

— — ' ~ — —

rvrM".r"jr?3 3I-3

53333

E£-rJ£:£

1."Z."I-"I.~

nn_i_~i.~i~ -— *^— - —

— 1."Z."1."1

vi.-i.i.-

Description

Rock fragments (limestone)

Rock fragments (limestone)

Weathered bedrock


BORINGJOB NUMPROJECTLOCATIODATE DRDRILLINC

£ ^

Q ""

42-

44-

46-

48-

50-

52-

56-

58-

MAMF MW-5 RFni nRTqr Kent HankinsonRFR 7720-086 riRTi i MF-mnn Hollow stem auger

VSM/Albaladejo farms SAMPI F MFTwnn Split spoonN Vega Baja, Puerto Rico THTAI nFPTH WO feet below ground surface (bgs)TI i Fn 1-28-98 ^IIRFAPF FI FVATinN 231.290 feet mean sea level (msl)

3 COMPAN

O

0)aCOto

Y Soil Tech nFPTM in RRfiiiMnwATFR '37.87 feet bgs

ifCD 0 Sa

mpl

eIn

terv

al

Rec

over

y(fe

et)

||

Bkg

Bkg

Lith

olog

y

z _ _ _ _ ^

ririrvrir

r-rir—r

^:^rL-L~

E-E—EE

z.ii.ij' .'z.

E™r]rir

w1 1 11 11 1 11 1I . I . I1 11 1 11 11 1 11 11 1 11 11 1 11 11 1 11 11 1 11 11 1 11 11 1 11 11 1 11 11 1 1. 1 . 1 .1 1 11 11 1

1 1 11 1

I 1 1

Description

LIMESTONE, pink, fossiliferous, massive, CaC03, fractures/vugspresent Core is fragmented and only one piece exceeds 3 inches inlength.

Same as above.


BORING NAMF MH-5 __JOB MIIMRFR 7720-086

Kent HankinsonDRILL MFTitnn Hollow stem auger

VSM/Albaladejo farms Split spoonVega Baja. Puerto Rico

DATE HRTI i Fn 1-28-98DRILLING r.nMPANY Soil Tech

SAMPLE METHOD-TOTAL DEPTH 1^0 feet below ground surface (bgs)SURFACE CLPVATTfiN 231.290 feet mean sea level (msl)DEPTH TO RRniiNnwATFR 137.87 feet bgs________

o

0)

<oen

IICD O

0) 10a >13

CO £

O (Uo ^0)cr

O)jOo Description

62-

64-

66-

68-

70-

72-

74-

76-

78-

40%

80-

Bkg

Bkg

Bkg

Bkg

I . I . II . I . I

1 . 1 . 1I I II I

I . I . I

\ i . ii . i . ii . i . i

i . i . ii . i . i1 7 1i l li . i . i

171TTT

i . i . i

I . I . Ti l li . i . iTTT

T . 1T, 1TTT

TTTI . I . ITTTEZLJlOTI I I

LIMESTONE, pink, brown, and white, fossiliferous, massive, CaCo3,fractures/vugs, dry, sharp, rounded and irregular contacts. Core isfragmented.

Same as above

Same as above with the addition of soft sediment in the core.

LIMESTONE, white, pink, fossiliferous, massive, soft. CaCo3 (85X),clay (15X), heavily fractured, dry, irregular contacts, core isfragmented and contains soft unconsolidated sediments.


RHRINR NAMF MW-5 Rpni nRT^T Kent Hankinson

JOB NUMPROJECTLOCATIO

DATE DRDRILLING

£i __

0. S±0) —a

OO

84-

86-

88-

90-

92-

94-

96-

98-

inn-

EIFR 7720-086 nRTi i MFTwnn Hollow stem augerVSM/Albaladejo farms SAMPI p MPTHOR Split spoon

N Vega Baia, Puerto Rico TCITAI nppiH 140 feet below ground surface (bgs)TI i pn -28-98 siiRFAr.F PI FVATTPIN 231.290 feet mean sea level (msl)

5 COMPAN

10)CL

cn

Y Soil Tech riFPTH in RRniiNnwATFR 137.87 feet bgs

tn

IIm o

1) 10Q. ZSl<" £

><

o oju iiQJcr

3 EZ Q.^ -S

Bkg

9kg

Bkg

Bkg

Lith

olog

y

1 1 11 1

1 1 11 11 1 11 1I I I1 1

I 1 1I 1

1 1 1l I

I I I1 11 1 11 1

j '•:.[.'. :f

M^1 .' . : .( .' ' : -\

tt&

v^Mt::^:,^

rWiWr

±M•»:• , • •+:• , • • !1 1 1

1 11 1 1

1 11 1 1

1 11 1 1

1 11 , 1 , 1

1 1 11 1

1 1 11 1

1 1 1

1 1 1I i

i 1 I1 1

1 1 1

1 1 11 1

I I 1

rurr- r

Description

Same as above.

SANDY LIMESTONE, white, pink, fossiliferous, massive, soft CaCo3(80X) clay (10X) sand (10X). heavily fractured, dry, irregular

contacts. Core is fragmented and contains soft unconsolidatedmaterial.

CLAY AND LIMESTONE, pink, brown, fossiliferous. massive, hard,CaCo3 (85X) clay (I5X), fractured, extensive moldic secondaryporosity, irregular contacts.

Same as above.


RDRTNfi NAMF MW-5

.inR NUMRFR 7720-086pRn.ipnT VSM/Albaladeio farmsi nnATinN Vega Baja, Puerto RicoriATF riRTi i Fn 1-28-98nRii i TNR COMPANY Soil Tech

RFOI nfiTqr Kent HankinsonDRTI i MFTwnn Hollow stem augerRAMPI F MfTunn Split spoonTHTAL pFp-rw 14° feet below ground surface (bgs)qiiRFAPF pi FVATTfiN 231.290 feet mean sea level (msl)nFPTH in RHnnunwATFP 137.87 feet bgs

-CQ. C

O

102-

104-

106-

108-

110-

112-

114-

116-

118-

ion

Q.

tn

11m o

<U ID0. >15(/} =

fc -> (U0 QJo i-4> —

CC

3 "ii aBkg

Bkg

Bkg

Bkg

Lith

olog

y

———— rj1 1 1

1 I1 1 1

1 11 1 1

1 11 1 1. 1 . 1 .I l lI I I

1 11 1 1

1 11 1 1

1 1 11 1

1 1 11 1

1 1 1

i i ri i ii i ii ii i ii i Ti ii i ii ii i ii iI . I . Ii iI I Ii ii i ii ii i ii ii i ii ii i i

•t • • • [ ; ••[

• 4: 4:/t :' ' vt : ' :. t.'4: .' jv\ : • • • ! • •:,-(.\4.\4.''i : ::.t : . :i: - } ; . •}'•:\i>:J VIi: ::A : : \: . \.-: :}. :•1 ; ' :.l : ' A;•:(•: .• • ( - : . •

•t :' ' vt : vt•' .• -Iv ' .• \.: •-t:;:. • ( : ; • • (

Description

LIMESTONE, brown, white, fossiliferous, massive, soft, CaCo3 (70%)clay (25%) sand (3%) heavily fractured and fragmented, dry,undiscernable contacts. Core is fragmented and contains no piecesexceeding 3 inches in length.

LIMESTONE AND CLAY, Same as above except interval contains 70%CaCo3 and 30% clay.

LIMESTONE, Same as above except interval contains 90% CaCo3 and10% sand.

SANDY LIMESTONE. Same as above except interval contains 65%CaCo3 and 35% sand.


BORING NAME MH-5_______JOB MIIMRFR 7720-086pRn.iFHT VSM/Albaladejo farms

Kent HankinsonDRILL MPTMnn Hollow stem auger

Split spoonVega Baja. Puerto Rico

DATE HRTI i En 1-28-98DRILLING COMPANY Soil Tech

SAMPLE METHOD.TOTAL HFPTH 1^0 feet below ground surface (bgs)SURFACE PI PVATTHN 231.290 feet mean sea level (msl)DEPTH TO PiRniiNnuATFR '37.87 feet bgs______

.c __Q. CQ ~"

0)a

vtII00 O

ID 10

PID •«-cn £

> HIO <UO ^(1)cc

z 9-x ^O)^O Description

Bkg Same as above except interval contains 95% CaC03 and 5% sand.

122-

124-

126-

128-

130-

132-

134-

136-

138-

Bkg I I I\ , r~ri i

LIMESTONE AND SANDY LIMESTONE, tan CaC03 (80%), sand (15%),clay (5%), massive, fossiliferous, fractures, dry, moldic porosity,rounded and sharp contacts.

ITT

1 , 1 , 1

Bkg LZL17171171 LIMESTONE, green/gray, massive, fossiliferous, fractures/vugs,

CaCo3 (90%), sand (5%). clay (5%), dry, moldic porosity, irregularcontacts.

Bkg SANDY LIMESTONE, green/gray, sandy texture, massive, fossiliferous,CaC03 (65%), sand (30%), clay (5%), fractures/vugs, dry, moldicporosity, irregular contacts predominate.

140-


BORING

JOB NUMPROJECT

LOCATIODATE DRDRILLING

.cQ. 24) —O

4-

6-

8-

10-

12-

14-

16-

18-

MAMF MW-6: OVERBURDEN RPni riRTqr Kent HankinsonRFR 7720-086 HRTI i MFTHOn Hollow stem auger

VSM/Albaladejo farms SAMPI F MFTunn Split spoonN Vega Baja, Puerto Rico TOTAI DFPTH 52 feet below ground surface (bgs)IU FR 2-26-98 qiiRFATF FI FVATTDN 188.277 feet mean sea level (msl)

3 COMPAN

6z<uQ.

1

SS-1

SS-2

SS-3

SS-4

Y Soil Tech nFPTH Tn RRniiNnwATFR "Q." feet bgs

tn

11CD 0

3558

3458

2565

10101010

to ID

e o3ID •;cn £

0-2

5-7

10-12

15-17

Rec

over

y(fe

et)

42%

54%

54%

50%

3 E

11

Bkg

0.8

0.6

0.7

Lith

olog

y

_ . _ . _

t A : ;i.•.•iv.-^.:.'i : A : :.i.•.•f/:.'!/:.•| : .' H : : vt; •.[•:.• .:)•:.••f :' ' vf :' ' :.-f.'.- Iv ' .• k: '•f : • : -f : - vf.'.- k:- j-.:t: 'H : :.t•' • i.: • i'.:f :t ;i.' . }v ' 1:

i: : :.4:J- :.l

Description

CLAYEY SILT, brown, firm, non-plastic, some limestone rock mixed in,no visible contamination, no chemical odor, dry. pH=6

SILTY CLAY, brown, firm, medium plasticity, no visible contamination,no chemical odor, dry. pH=6

Same as above.

SANDY LIMESTONE, white, friable, strongly weathered, fossiliferous,30% moldic porosity, no odor or visible contamination. pH=6

20- ———————————————————————————————————————————————————————————————————————————————————Notes:

WOR - Weight of RodNE - Not Encountered


BORING tJOB NUMIPROJECTLOCATIODATE OR

DRILLINC

.c ^__

a

•

22-

24-

26-

28-

30-

32-

36-

38-

An-

JAMF MW-6: OVERBURDEN RFDI DRTST Kent Hankinson3FR 7720-086 nHTi i MFTwnn Hollow stem auger

VSM/Albaladejo farms <;AMPI F MFTwnn Split spoonN Vega Baja, Puerto Rico TDTAI HFPTH 52 feet below ground surface (bgs)TI i pn 2-26-98 qiiRFArp PI FVATTDN 188.277 feet mean sea level (msl)

i COMPAN

6z(UQ.6(0en

SS-5

SS-6

SS-7

SS-8

v Soil Tech PIPPIN in RRniiNinwATFR '16-1' feet bgs

llCD 0

1

21

WOR

WOR

71811

2

1

<L> ID1 ££ QJ(0 -«

20-22

25-27

30-32

35-37

£•&O (U0 0)ac.

13%

NR

4%

21%

z a

0.2

NA

0.3

0.3

Lith

olog

y

^

m*:'.4.=. ••.•]•.= :•.

M4MnMM.17

• [ • • • • t - ' v f

^w; .-.K:: .-.j-.:: .•h ,':.l: '; / .j-/; / .]•_• ; _

-t:i't:'.| -1

!-:>4*4A:V--.:t-!'--'/:0::j.;'-

^7F&: •^•::'-|-::'i,:j ••f:f.l

^4

H4tepM"1: A-h -M; • .]• • ; • 1- • ;

1 ::• + :•:• +

|:'.:|:.:|: .-•j-/.'.--}/.'•1 : : vf : : :.+.' :•{.'•' .'}:•:•\ ; ; -.-f ; ; \-\: .•|.::.-^.:.'1 : ' (A : ' :A:'-\: :'•$'•:'1 : ' '.+ : .' :.'\: :•:•::]:•:'('i Vti'.vt.

l:'-'-i:'-':4

Description

Same as above except interval has large cavity. pH=6

Same as above.

•

-

-

Notes:WOR - Weight of RodNE - Not Encountered


BORING

JOB NUMPROJECT

LOCATIODATE DRDRILLINC

.c _ci. c:oj ~0

A f\

44-

A O

48-

50-

52-

54-

58-

58-

O A

NAMF MW-6: OVERBURDEN RPni nnrqj Kent HankinsonRFR 7720-086 PIRTI i MFTunn Hollow stem auger

VSM/Albaladejo farms CJAMPI F MFTHnn Split spoonM Vega Baja, Puerto Rico TriT'l nppTH 52 feet below ground surface (bgs)11 i pn 2-26-98 SIIRFAHF FI FVATTHN 188.277 feet mean sea level (msl)

5 COMPAN

d

«aEit)cn

SS-9

SS-IO

Y Soil Tech DFPTH in RRmiNnwATFR "6.11 feet bgs

<n

IICD 0

50

32711

50

D 10Q. £1|

(f> £

40-42

45-47

>s -^> 110 HIo *•a> —cc

4%

63X

= "ii&

0.4

0.6

Lith

olog

y

i ; . -- l : :-- f.••.•*:-:'.-l.--:-

±M• f f : I f : • ; • • »:•,*.••,*.::•..[ : J : . : .[M^V^l^MiMuiij&M• 4 v . . - J v -f : . - - f : . - - f/'.4-',:k--4 : - - l f : - , - f.••.4/.--.4:.--f : - - f : : U

^

M^M^±m^Mm\m\c^i\.••.•i--.--.-i--.-:f : - : . f : - : . f:,i-,:l:f ; - : . f : - - - f

Description

SANDY LIMESTONE.brown, pink and white, friable, weathered, fossil-iferous, no visable contamination, no chemical odor, dry, f-c grainedsubangular sand. pH-6

-

Same as above.

-

Notes:WOR - Weight of RodNE - Not Encountered


APPENDIX DMONITORING WELL DIAGRAMS

300977

wellJob Mumh>r 7720-086

VSM/Albaladejo farmsVega Baja. Puerto Rico

Date TnotallPd 2-11-98

Kent Hankinson

Drilling rnmpany Soil TechDrill n*thnrt Air Rotary

'82.35TotalSurface Fip»atinn 222.317

ft below ground surface

ft mean sea level

Top of Casing ElevationJ24.430_____ft mean sea levelDepth to watpr 148.43_____ft below ground surface

PROTECTIVE CASING

ROUND SURFACE/CONCRETE PAD

CEMENT BENTONITE GROUT

B" DIAMETER PVC CASING

OUTER CEMENT BENTONITE GROUT

'4" DIAMETER SCHEDULE 40 PVC CASING

BENTONITE SEAL

T3RAVEL PACK

'4" DIAMETER 0.020 SLOTSCHEDULE 40 PVC SCREEN

DEPTH INTERVAL+2.5' - 2.51

+0.5' - O.O1

+10' - 16.0'

+1.0' - 16.0'

0.0' - 16.0'

+2.0' - 160.0'

154.0' - 157.0'

157.0' - 190.0'

160.0' - 180.0'

COM FEDERAL PROGRAMS CORPORATIONMONITORING WELL CONSTRUCTION DIAGRAM (NOT TO SCALE)

300978VSM SITE

MW-02Well

Job Nnmhpr 772Q-Q86

projpr-t VSM/Albaladejo farmsVega Baja, Puerto Rico

/- Date Installed 2-17-98Kent Hankinson

Drilling nnmpany Soil Tech_______________Drill MPthnri Air Rotary_________________Total nppth 150.20_____ft below ground surface

Surface ElevationJ§§J2°_ ft mean sea level

Top of Casing ElevationJ^LLli_____ft mean sea levelDepth to Matpr 114.55_____ft below ground surface

PROTECTIVE CASING

BROUND SURFACE/CONCRETE PAD

TJEMENT BENTONITE GROUT


OUTER CEMENT BENTONITE GROUT

'4" DIAMETER SCHEDULE 40 PVC CASING

BENTONITE SEAL

BRAVEL PACK

"4" DIAMETER 0.020 SLOTSCHEDULE 40 PVC SCREEN

DEPTH INTERVAL+2.5' - 2.5'

+0.5' - 0.0'

+1.0' - 20.0'

+1.0' - 20.01

0.0' - 20,0'

+2.0' - 127.0'

107.0' - 110.0'

110.0' - 150.2'

127.0' - 147.0'

300979


VSM SITE

MW-03Well

Job Mnmh»r 7720-086

pro|pr.f VSM/Albaladejo farmsVega Baja. Puerto Rico

Date 2-28-98

Kent Hankinson

Drilling nnmpany Soil TechDrill MPthnri Air RotaryTotal nppth 117.60 ft below ground surface

Surface Elevation J73J6J ft mean sea levelTop of Casing nation 176.452 ft mean sea levelDepth to viatPf 85.25 _____ ft below ground surface

PROTECTIVE CASING

ROUND SURFACE/CONCRETE PAD



*———————OUTER CEMENT BENTONITE GROUT

•4" DIAMETER SCHEDULE 40 PVC CASING

BENTONITE SEAL

T3RAVEL PACK

•4" DIAMETER 0.020 SLOTSCHEDULE 40 PVC SCREEN


+0.5' - 0.0'

+1.0' - 65.0'

+1.0' - 65.0'

0.0' - 65.0'

+2.0' - 95.0'

90.0' - 92.0'

92.0' - 117.6'

95.0' - 115.0'

300980


VSM SITE

MW-04Well

Job Niimh»r 772Q-Q86

Date

VSM/Albaladejo farmsVega Baja. Puerto Rico

2-2-98

Kent Hankinson

Air RotaryDrillingDrillTotal nPpth 192.95

Surface

Soil Tech

ft below ground surface241.504 ft mean sea level

Top of Casing nation 244.368 ft mean sea levelDepth to water 174.86_____ft below ground surface

PROTECTIVE CASING

•GROUND SURFACE/CONCRETE PAD

"CEMENT BENTONITE GROUT

T3" DIAMETER PVC CASING

DUTER CEMENT BENTONITE GROUT

"4" DIAMETER SCHEDULE 40 PVC CASING

BENTONITE SEAL

BRAVEL PACK



+0.5' - 0.0'

+1.0' - 13.0'

+1.0' - 13.0'

0.0' - 13.0'

+2.0' - 170.0'

164.0' - 167.0'

167.0' - 192.9'

170.0' - 190.0'

300981


VSM SITE

MW-05Well

Job MumhPr 7720-086

Prnjpr:t VSM/Albaladejo farmsVega Baja. Puerto Rico

Date installed 3-10-98Kent Hankinson

DrillingDrillTotalSurface

Soil TechAir Rotary

169.70 ft below ground surface231.29 ft mean sea level

Top of Casing Fi»w»«nn 235.09 ft mean sea level

Depth to '37.87 ft below ground surface

PROTECTIVE CASING

GROUND SURFACE/CONCRETE PAD



*———————OUTER CEMENT BENTONITE GROUT

"4" DIAMETER SCHEDULE 40 PVC CASING

BENTONITE SEAL

BRAVEL PACK

"4" DIAMETER 0.020 SLOTSCHEDULE 40 PVC SCREEN


+0.5' - 50.01

+1.0' - 50.0'

+1.0' - 50.0'

0.0' - 50.0'

+2.0' - 137.0'

131.0' - 134.0'

134.0' - 169.7'

137.0' - 167.0'


300982

VSM SITE

MW-06Well

Job NnmhPr 772Q-Q86

projp,-t VSM/Albaladejo farms

i oration Vega Baja. Puerto Rico

Date TnstallPd 3-4-98

Kent Hankinson

DrillingDrill

Total

Soil TechAir Rotary

154.00

Surface ElevationTop of Casing

Depth to Water JIM.

ft below ground surfaceft mean sea level

221.854 ft mean sea levelft below ground surface

PROTECTIVE CASING

BROUND SURFACE/CONCRETE PAD

tEMENT BENTONITE GROUT


*——————OUTER CEMENT BENTONITE GROUT

•4" DIAMETER SCHEDULE 40 PVC CASING

BENTONITE SEAL

BRAVEL PACK


DEPTH INTERVAL+2.51 - 2.5'

+0.51 - O.O1

+1.0' - 54.0'

+1.0' - 54.0'

O.O1 - 54.0'

+2.0' - 122.0'

114.0' - 119.0'

119.0' - 154.00'

122.0' - 142.0'


300983

VSM SITE

APPENDIX EFIELD SAMPLING WATER QUALITY PARAMETERS

300984

TABLE D-l

oooovr>ooui

Water Quality Parameters Measured in the Field during Round 1 Monitoring Well SamplingRemedial Investigation, V&M/Albaladejo Farms Site, Vega Baja, Puerto Rico

Page 1 of 2

SampleLocation

(date)MW-1

(4-2-98)

rate change

Sample

MW-2(4-2-98)

rate change

sampled

MW-3"(4-1-98)(bailed)

sampledMW-4*(4-1-98)(bailed)

sampled

Time

1135114011451150115512001205121012151235740745800810825830840850900

10101455150015101520153015401550820850915930950

100510251100

ElapsedTime(mln.)

05101520253035406005

20304550607080150051525354555030557090105125160

Volume(ml)

05,00010,00013,75017,50021,25025,00028,75032,50047,500

04,60014,10023,60027,35028,60031,10033,60036,10053,600

018,92556,77594,625132,475170,325208,17518,90037,80056,70075,60094,500113,400132.300

NR

PumpBTOC

(ft)170H H

N H

H It

«t M

H M

M M

H N

n »

" M

135" "M H

N N

II H

" "

" «

. .

N «

II N

105H N

" "

H N

H It

" "

" "

NA" *H H

« H

" "

tt H

" H

« tt

DepthBTOC

(ft)148.48149.10149.15149.09149.10149.11149.10149.09149.09149.10114.16118.38119.30120.85120.95120.85120.90120.86120.90121.0285.2086.1086.1086.2586.1086.1086.10174.85178.80

NR178.01

NR179.72178.90

NR

Draw-Down

(ft)0.00-0.62-0.67-0.61-0.62-0.63-0.62-0.61-0.61-0.620.00-4.22-5.14-6.69-6.79-6.69-6.74-6.70-6.74-6.860.00-0.90-0.90-1.05-0.90-0.90-0.900.00-3.95

NR-3.16

NR-4.87-4.05

NR

pH

0.007.597.577.607.617.657.617.597.597.540.007.4207.6007.6507.6607.6807.6807.7107.6907.6400.007.447.417.407.407.427.400.007.407.437.447.487.487.49NR

Cond.(mS/cm)

0.0000.5200.5210.5230.5230.5230.5240.5240.5240.5240.0000.5930.5640.5650.5630.5620.5610.5590.5610.6010.0000.5070.4940.5070.5060.5070.5060.0000.4930.4640.4640.4630.4630.464

NR

Turbidity(NTU)

0.002.022.000.430.260.240.200.200.200.200.007.39

13.5210.0810.0310.109.209.509.809.800.004.722.032.021.581.331.15

0117190274318306311NR

DO(mg/L)

0.001.071.14.62.80.81.20.42.46

0.670.001.021.722.592.662.682.802.432.521.860.004.414.524.724.914.994.040.003.072.673.003.083.002.96NR

Temp.(•C)

0.025.426.827.327.828.128.128.228.328.40.0

24.726.027.226.926.726.726.626.627.30.0

26.325.825.725.926.126.20.0

24.224.325.225.325.224.8NR

Salinity(%)

0.000.020.020.020.020.020.020.020.020.020.000.020.020.020.020.020.020.020.020.020.000.020.020.020.020.020.020.020.020.020.020.020.020.020.02

Eh(mV)

0.00-1.00-1.00-1.00-1.00-1.00-1.00-1.00-1.00-1.000.001300-1.00-1.00-1.00-1.00-1.00-1.00-1.00-1.00

0-282-284-289-282-281-284

0111122134143169144NR


TABLE D-l (continued)

Water Quality Parameters Measured in the Field during Round 1 Monitoring Well SamplingRemedial Investigation, V&M/AIbaladejo Farms Site, Vega Baja, Puerto Rico

Page 2 of 2

SampleLocation

(date)MW-5

(4-2-98)

sampled

MW-6"(4-1-98)

out of gas

sampled

Time

14151420142514301435144014451450145515001505151015351130114811501155130013101320133013401350

ElapsedTime(min.)

05101520253035404550558001820

253545556575

Volume(ml)

03,7507,50011,25015,00018,75022,50026,25030,00033,75037,50041,25060,000

075,70079,485

90,840105,980121,120136,260151,400166,540

PumpBTOC

(ft)158

M N

N H

N M

H M

" "

II H

H N

H M

H H

" "

N M

N H

130" "" *

N H

" "

N H

H H

N M

M *>

DepthBTOC

(ft)137.92138.65138.60138.55138.60138.60138.61138.64138.63138.64138.61138.62138.64116.00118.10118.80

118.20119.30119.30119.40119.50119.50

Draw-Down

(ft)0.00-0.73-0.68-0.63-0.68-0.68-0.69-0.72-0.71-0.72-0.69-0.70-0.720.00-2.10-2.80

-2.20-3.30-3.30-3.40-3.50-3.50

PH

0.007.617.637.607.617.637.657.607.637.637.627.637.600.007.457.42

7.417.427.417.447.467.44

Cond.(mS/cm)

0.0000.5650.5660.5660.5660.5660.5670.5670.5670.5670.5670.5670.5680.0000.4980.498

0.4940.4980.4980.4990.4990.498

Turbidity(NTU)

0.007.844.413.493.653.772.673.012.862.862.972.982.98

012<10

<10<10<10

3.082.032.05

DO(mg/L)

0.001.251.291.080.951.201.451.061.491.531.591.351.160.000.353.16

4.093.573.383.353.213.53

Temp.CC)

0.027.8028.3028.3028.5028.7028.6028.9029.4029.4029.4029.4029.400.0

27.827.8

26.727.027.428.128.428.7

Salinity(%)

0.000.020.020.020.020.020.020.020.020.020.020.020.020.000.020.02

0.020.020.020.020.020.02

Eh(mV)

0.00-1.00-1.00-1.00-1.00-1.00-1.00-1.00-1.00-1.00-1.00-1.00-1.00

0152198

133178181189191190

U)oovo00

(*) Well purged using bailer, well sampled using a disposable bailer(") Well purged using pump, well sampled using a disposable bailerNR -Not RecordedpH measured in standard unitsConductivity (Cond.) measured in millisiemins / centimeter (mS/cm).Turbidity measured in Nephelometric Turbidity Units (NTU).Dissolved Oxygen (DO) measured in milligrams per liter (mg/L).Temperature measured in degrees Celsius (°C)Salinity measured in percent (%).Oxidation potential (Eh) measured in millivolt (mV).


TABLE D-2


Page 1 of 4

tooovo00

SampleLocation

(date)MW-1

(5-20-98)

sample

MW-2(5-20-98)

sampled

Time

12151220122512301235124012451250125513001305131013151320132513301335135090090591091592092593093594094595095510001005101010151115

ElapsedTime(mln.)

0510152025303540455055606570758095051015202530354045505560657075135

Volume(ml)

02,5005,0007,50010.00012,50015,00017,50020.00022,50025,00027,50030,00032,50035,00037,50040,00047,500

0500

1,0001,5002,0003,0004,0005,0006,0007.0008,0009,00010,00011,00012,00013,00025.000

PumpBTOC

(ft)170" "M •

M H

II I.

M H

" "

" H

II M

H N

II N

•1 H

II «

II n

H H

H H

M N

N H

135n H

M M

It H

H N

H N

H H

H M

N H

H H

" "

II H

" "

n H

" "" "II H

DepthBTOC

(ft)147.85147.95147.95147.96147.95147.96147.95147.95147.95147.95147.95147.95147.95147.95147.95147.95147.95147.95113.37114.20114.19114.00113.94113.93113.92113.91113.90113.90113.91113.90113.90113.91113.90113.90113.91

Draw-Down

(ft)0.00-0.10-0.10-0.11-0.10-0.11-0.10-0.10-0.10-0.10-0.10-0.10-0.10-0.10-0.10-0.10-0.10-0.100.00-0.83-0.82-0.63-0.57-0.56-0.55-0.54-0.53-0.53-0.54-0.53-0.53-0.54-0.53-0.53-054

PH

0.008.297.898.637.507.447.477.627.637.707.938.378.358.348.348.348.348.330.008.338.468.478.418.418.418.428.428.418.418.428.428.428.428.428.34

Cond.(mS/cm)

0.0005.8505.8505.8500.5840.5840.5840.5820.5810.5810.5830.5820.5820.5820.5810.5820.5810.5800.0000.6500.6520.6520.6590.6570.6550.6540.6510.6490.6470.6450.6440.6430.6430.6436.530

Turbidity(NTU)

DO(mg/L)

0 0.00101010

1.851.281.071.211.361.671.341.211.621.751.591.741.541.58

06919199999999979797959494949510

2.221.951.921.921.972.051.951.761.521.361.211.151.121.191.181.151.170.002.318.568.613.273.615.426.398.598.598.618.628.578.438.428.411.75

Temp.(•C)

0.025.625.625.625.926.126.325.325.626.427.829.229.129.229.229.129.129.10.024.724.824.824.824.724.824.825.025.125.325.425.625.926.026.030.8

Salinity(%)

0.000.020.020.020.020.020.020.020.020.020.020.020.020.020.020.020.020.020.000.020.020.020.020.020.020.020.020.020.020.020.020.020.020.020.02

Eh(mV)

IFIFIFIFIFIFIFIFIFIFIFIFIFIFIFIFIFIFIFIFIFIFIFIFIFIFIFIFIFIFIFIFIFIFIF


TABLE D-2 (continued)


Page 2 of 4

SampleLocation

(date)MW-3

(5-19-98)

sample

MW-4(5-18-98)

rate change

sampled

Time

10201025104010451050105511001105111011151120112511301135114011451210134513501355140014051410141514301435144014451450145515001535

ElapsedTime(min.)

05

202530354045505560657075808511005101520253045505560657075110

Volume(ml)

01,5006,0007,5009,00010,50012,00013,50015,00016,50018,00019,50021,00022,50024,00025,50033,000

02,0004,0006,0008,00010,00012,00018,00020,00022,00024,00026,00028,00030,00044,000

PumpBTOC

(ft)105N H

" "

H M

H M

H I.

H H

M H

M H

M .

H H

" "

II .

M H

" "

II N

M M

182H It

N H

H M

H If

n »

H H

* H

H "

It H

H H

H H

H H

H M

" "

DepthBTOC

(ft)82.6882.7282.7282.7282.7182.7282.7282.7282.7182.7082.7182.7282.7482.7482.7382.7382.75174.50175.00175.10174.99174.91174.81174.80174.79174.78174.78174.79174.78174.79174.78174.76

Draw-Down

(ft>0.00-0.04-0.04-0.04-0.03-0.04-0.04-0.04-0.03-0.02-0.03-0.04-0.06-0.06-0.05-0.05-0.070.00-0.50-0.60-0.49-0.41-0.31-0.30-0.29-0.28-0.28-0.29-0.28-0.29-0.28-0.26

pH

0.008.457.807.507.327.217.207.247.357.687.898.128.158.058.128.138.200.008.768.147.637.957.927.958.378.418.358.398.368.358.348.38

Cond.(mS/cm)

0.0000.5680.5670.5670.5680.5690.5700.5690.5690.5680.5690.5680.5730.5740.5720.5690.5670.0000.5000.4970.4880.4890.4890.4900.4920.4920.4940.4940.4940.4940.4950.494

Turbidity(NTU)

01710111410871410813910897026302319182737363330322829117

DO(mg/L)

0.006.385.835.244.924.684.824.354.384.284.274.234.854.254.474.524.630.005.305.044.844.544.694.454.824.404.484.574.524.424.528.18

Temp.rc>0.0

26.125.725.325.325.425.826.126.326.826.927.225.828.628.027.927.70.0

26.325.925.925.826.327.328.528.728.929.029.029.129.129.5

Salinity<%)

0.000.020.020.020.020.020.020.020.020.020.020.020.020.020.020.020.020.020.020.020.020.020.020.020.020.020.020.020.020.020.020.02

Eh(mV)

0-260-238-203-235-208-233-224-234-306-293-274-172-164-148-1352808788898989898890919192939391

u>oovo0000




Pageiof 4

SampleLocation

(date)MW-5

(5-19-98)

sampled

MW-6(5-18-98)

sampled

Time

800805810815820825830835840845850855900930105011001105111011151120112511301135114011451150115512001240

ElapsedTime(min.)

05101520

_ 253035404550556090010152025303540455055606570110

Volume(ml)

02,0004,0006,0008,00010,00012,00014,00016,00018,00020,00022,00024,00036,000

03,7859,00012,00015,00018,00021,00024,00027,00030,00033,00036,00039,00042,00066,000

PumpBTOC

(ft)15811, HH H11 Hii iiii HH HH HH H" "ii HH Hn nH n

130H II

II II

" "

II H

II II

II II

II II

II II

II II

II II

II II

H II

II II

II H

DepthBTOC

(ft)135.85135.85135.85135.85135.85135.85135.85135.85135.85135.85135.85135.85135.85135.85115.25116.20116.21116.60116.70116.71116.71116.75116.80116.90117.00117.00117.00117.00116.51

Draw-Down

(ft)0.000.000.000.000.000.000.000.000.000.000.000.000.000.000.00-0.95-0.96-1.35-1.45-1.46-1.46-1.50-1.55-1.65-1.75-1.75-1.75-1.75-1.26

pH

0.008.278.388.378.528.538.498.488.468.478.458.478.468.500.0010.769.649.268.948.878.688.638.548.558.568.588.508.438.35

Cond.(mS/cm)

0.0000.5630.6320.6280.6260.6250.6250.6260.6250.6250.6250.6270.6250.6280.0000.4920.5260.5200.5210.5190.5170.5160.5110.5150.5140.5130.5180.5190.526

Turbidity(NTU)

054

2.071.831.562.082.112.111.871.931.741.841.84

0211610141715

17.0019.0018.0016.0015.0014.0014.008.00

DO(mg/L)

0.003.993.253.063.673.393.743.763.293.083.063.203.083.150.006.004.914.424.414.334.574.564.144.264.244.474.374.454.70

Temp.(°c>

0.024.3024.2024.4024.5024.6025.1025.7026.2026.5027.0027.0027.0028.200.0

25.125.426.527.227.928.328.628.728.929.029.129.129.232.4

Salinity(%)

0.000.020.020.020.020.020.020.020.020.020.020.020.020.020.000.020.020.020.020.020.020.020.020.020.020.020.020.020.02

Eh(mV)

0-114

-1168-1108-938-993-1050-1118-1114-1141-1114-1331-1141602

03525212936424644525559616171

(*) Well purged using bailer, well sampled using a disposable bailer(**) Well purged using pump, well sampled using a disposable bailerNR - Not RecordedIF - Instrument Failure

ooVD00VO




Page 4 of 4

pH measured in standard unitsConductivity (Cond.) measured in millisiemins / centimeter (mS/cm).Turbidity measured in Nephelometric Turbidity Units (NTU).Dissolved Oxygen (DO) measured in milligrams per liter (mg/L).Temperature measured in degrees Celsius (°C).Salinity measured in percent (%).Oxidation potential (Eh) measured in millivolt (mV).

U>oovovoo


TABLE D-3

U)oovovo


Page 1 of 2

SampleLocation

(date)MW-1"

(9-10-98)sampleMW-2"

(9-10-98)(sampled

upon recovery@1410)

MW-3"(9-10-98)

sampledMW-4*(9-9-98)

sampled

Time

1005101510251230123512451305141013401345135514051350140014191424143414451505

ElapsedTime(min.)

010200515751800515250102934445575

Volume(gals)

0306005

2039 (dry)

05

2055051015202530

PumpBTOC

(ft)170NRNR135H M

H M

H II

M H

105H H

W M

H H

182" "H n

H H

« H

H N

H H

DepthBTOC

(ft)148.05

NRNR

113.47" "* 14

139.50131.5083.61

NRNRNR

174.53NRNRNRNRNRNR

Draw-Down

(ft)0.00NRNR

NRNR

26.0318.030.00NRNRNR

0.00NRNRNRNRNRNR

pH

7.147.147.36

7.228.46NRNR

0.007.087.097.197.147.157.227.217.267.307.20

Cond.(mS/cm)

0.4790.4800.478

0.5230.652

NRNR

0.0000.4650.4640.4630.4300.4310.4160.4150.4120.4140.415

Turbidity(NTU)

DO(mg/L)

4 1.27216

11691NRNR0

576275248115109383668231

0.713.10

0.868.56NRNR

0.005.705.345.644.674.295.185.185.255.23420

Temp.(•C)

25.325.925.6

26.824.8NRNR0.027.026.526.328.128.229.929.930.730.730.5

Salinity(%)

0.010.010.01

0.020.02NRNR

0.000.010.010.010.010.010.010.010.010.010.01

Eh(mV)

180146125

IFIFIFIF0IFIFIF

-118-98-80-80-83-29-20




Page 2 of 2

SampleLocation

(date)MW-5"

(9-10-98)

sampledMW-6"(9-9-98)

sampled

Time

75075580281583084590015401550160016101620

ElapsedTime(min.)

051225405570010203040

Volume(gals)

0102030405060010203036

PumpBTOC

(ft)158

H H

H H

n H

N M

" "

H H

130" H

" "N H

N II

DepthBTOC

(ft)137.23

NRNRNRNRNRNR

116.02NRNRNRNR

Draw-Down

(ft)0.00NRNRNRNRNRNR

0.00NRNRNRNR

pH

0.006.337.147.287.147.157.127.187.207.287.187.10

Cond.(mS/cm)

0.0000.5650.5210.5190.5260.5230.5250.4340.4340.4950.4360.439

Turbidity(NTU)

01541003732966

DO(mg/L)

0.000.770.703.611.020.510.525.705.404.604.053.93

Temp.CC)

0.024.6025.1025.1026.8026.5026.8025.825.926.325.926.9

Salinity(%)

LO.OO0.060.060.060.060.060.060.010.010.010.010.01

Eh<mV)

0-90-36-36-35-39-42-16-16-16-11-11

00oovovoto

(*) Well purged using pump, well sampled using pump(") Well purged using pump, well sampled using a disposable bailerNR - Not RecordedpH measured in standard unitsConductivity (Cond.) measured in millisiemins / centimeter (mS/cm).Turbidity measured in Nephelometric Turbidity Units (NTU).Dissolved Oxygen (DO) measured in milligrams per liter (mg/L).Temperature measured in degrees Celsius (°C).Salinity measured in percent (%).Oxidation potential (Eh) measured in millivolt (mV).


00oovovoCO

TABLE D-4


Page 1 of2

SampleLocation

(date)MW-1

(11-11-98)sampleMW-2

(11-12-98)(sampled

upon recovery@1045)MW-3

(11-12-98)

sampledMW-4

(11-11-98)

(sampledupon recovery

©1050)

Time

14051430142590091092093094010401050110011109409501000101010201030

ElapsedTime(min.)

01020010203040010203001020304050

Volume(gals)

025500204050(dry)02040600510152030

PumpBTOC

(ft)170NRNR135

H Hii Hn HII H

105n nn nM «

182It H

11 "

It tl

11 II

II II

DepthBTOC

(ft)144.44

NRNR

108.66NR

136.40NRNR

75.54NRNRNR

173.90NRNRNRNR

190.00

Draw-Down(ft)

0.00NRNR

0.00NR

27.74NRNR

0.00NRNRNR

0.00NRNRNRNR

16.1 (dry)

pH

7.007.007.006.707.007.307.00NRIFIFIFIF

7.107.107.207.207.10NR

Cond.(mS/cm)

0.5600.5700.5700.7700.6700.7000.670

NRIFIFIFIF

0.5100.5100.5100.5100.510

NR

Turbidity(NTU)

DO(mg/L)

30 1.80200

486369896NRIFIFIFIF3IFIFIFIF

NR

1.400.801.802.808.207.90NRIFIFIFIF

9.105.706.406.309.10NR

Temp.(°C)

26.026.026.025.025.025.026.0NRIFIF

26.526.329.030.030.029.030.0NR

Salinity(%)

0.000.000.000.000.000.000.00NRIFIFIFIF

0.000.000.000.000.00NR

Eh(mV)

112106 -1058818

123118IF

110116120116128100113116110NR




Page 2 of 2

SampleLocation

(date)MW-5

(11-11-98)

sampledMW-6

(11-10-98)

sampled

Time

1200120512101215122012251230123512401230123512401245

ElapsedTime(min.)

0510152025303540051015

Volume(gals)

010203040506070800

204060

PumpBTOC

(ft)158

H *•« N

H H

H N

N n

H M

H «

M M

130H H

» *

H M

DepthBTOC

(ft)129.56

NRNRNRNRNRNRNRNR

111.60NR

113.20NR

Draw-Down

(ft)0.00NRNRNRNRNRNRNRNR

0.00NR

1.60NR

pH

7.107.107.207.007.107.007.207.107.006.606.987.037.00

Cond.(mS/cm)

0.6100.6100.6000.6200.6100.6200.6200.6200.6200.3750.5250.5090.510

Turbidity(NTU)

IFIFIFIFIFIFIFIFIF

146206466

DO(mg/L)

11.8011.6010.801.609.101.801.809.6010.003.904.728.854.60

Temp.CO

27.026.0026.0026.0026.0026.0026.0026.0025.0026.126.025.928.0

Salinity(%)

0.000.000.000.000.000.000.000.000.000.010.020.020.00

Eh(mV)

-22302974908783838810716667

Oovo

All wells purged using pump, wells sampled using a disposable bailerNR -Not RecordedpH measured in standard unitsConductivity (Cond.) measured in millisiemins / centimeter (mS/cm).Turbidity measured in Nephelometric Turbidity Units (NTU).Dissolved Oxygen (DO) measured in milligrams per liter (mg/L).Temperature measured in degrees Celsius (°C).Salinity measured in percent (%).Oxidation potential (Eh) measured in millivolt (mV).


APPENDIX FQA/QC MEASURES AND DATA QUALITY

300995

OA/OC MEASURES AND DATA QUALITY

All field activities were completed in accordance with the Final POP (CDM Federal, 1997b). Nodeviations from the POP were noted during the field sampling activities except for the decision tosample with dedicated Teflon bailers in three wells in Round 1 and all the wells in Round 3 (exceptfor MW-6) and Round 4. Refer to Section 2.4 for discussion of the rationale for the approveddeviation in sampling procedure.

The POP defined QC analytical requirements to ensure accuracy, precision and sensitivity of analysis.Groundwater samples collected for TCL organics and pesticides/PCBs and TAL inorganics wereanalyzed through the contract laboratory program (CLP). Rigorous QA/QC procedures have beenestablished for CLP laboratories. Analytical QC procedures are detailed in most current revisionsof the CLP Routine Analytical Services (RAS) statement of work, multi-media, multi-concentration(SOW) for TCL organics, OLM03.2; inorganics (TAL metals plus cyanide), ILM040; and the SOWfor low detection level organics in water, OLC02.1. The RAS parameter analytical accuracy,precision, and sensitivity Data Quality Objectives (DQOs) required for this project are provided inthe above cited SOWs.

F.I FIELD REPRESENTATIVENESS, COMPLETENESS. AND COMPARABILITY

The following discussion covers the DQOs of precision, accuracy, representativeness, completeness,and comparability (PARCCs) and how these DQOs were achieved through field operations and theanalytical process.

Precision

Precision measures the reproducibility of measurements under given set of conditions. Precision ofmeasurement data is a function of sampling and analytical controls. Duplicate samples were analyzedas part of the field program in order to assess the precision of sampling techniques and laboratoryanalyses. The duplicates and corresponding sample data showed good correlation. This shows thatgood sampling control was maintained. Analytical controls were met by satisfactorily followingEPA-approved methods (e.g., CLP statements of work) which specify precision limits for acceptableanalyses. This was verified during validation. Therefore, the data collected during the RI werejudged to demonstrate good precision.

Accuracy

Accuracy measures the bias in a measurement system. Activities that affect accuracy includesampling techniques, sample preservation, handling, storage, and steps taken to control site-relatedand laboratory-related contamination. The proper employment of these operations was confirmedduring the on-site field system audit. The accuracy of sample results is assessed by data validatorsduring data review of matrix and/or analytical spike results, surrogates, laboratory control, andperformance evaluation samples, where applicable.

300996

The raw laboratory data were reviewed and evidence of daily calibration of detection instruments andanalyses of matrix spikes were found. The analyses appeared to be conducted according to publishedprocedures and standard internal laboratory control checks were performed.

Representativeness

Representativeness expresses the degree to which the sample portrays the population characteristicsof process/environmental conditions at a given location and point in time. For example, to ensurerepresentativeness of groundwater data during the RI, groundwater was evacuated from wells priorto sampling until indicator parameters (temperature, pH, specific conductance, etc.) had stabilizedwithin 10% over two successive well volumes. This indicates that fresh formation groundwater wassampled from the monitoring wells. In addition, all field procedures for sample collection werefollowed in strict accordance with the approved POP.

In groundwater sampling, representativeness was assured by employing the low-flow purging andsampling method in three wells in Round 1, all wells in Round 2, and one well in Round 3; and bysampling with dedicated Teflon bailers in three wells in Round 1, five well in Round 3, and all thewells in Round 4. The use of dedicated, decontaminated sampling equipment constructed withrequired material such as Teflon and stainless steel also contributes to the sample'srepresentativeness.

Completeness

Completeness is defined as the percentage of all measurements made whose results are judged to bevalid. The laboratories provided data meeting the defined acceptance criteria of 90 percent of thesamples analyzed. Valid data are the those which had not been rejected during data validation.

Comparability

Comparability is a qualitative parameter expressing the confidence with which one data set can becompared with another. The environmental data for the site was generated in a way that assurescomparability. Established and proven standardized sampling and analytical procedures were used.Data were reported in standardized formats using consistent units of measurements, such as parts perbillion.

Data Usability

Data usability was judged by the data validation procedures. Only those samples results that weredeemed valid were utilized to evaluate the nature and extent of groundwater contamination.

F.2 PC SAMPLE ANALYSIS

The following QC samples were collected as part of the field program and were analyzed in the samemanner as the field samples.

300997

Duplicates

Field duplicate samples were collected and analyzed to assess the overall precision of the field andlaboratory effort. One duplicate sample was collected, based on a rate of five percent or one per 20samples or less. The duplicate was submitted "blind" to the laboratories by using a sample numberand collection time separate from its associated environmental samples.

A total of five duplicates were collected during the pre-round spring and supply well sampling eventand the four on-site monitoring well sampling events. A comparison of field duplicates and theirassociated samples during data validation revealed no significant problems with the data, except forMW-7 from Round 2. MW-7, a duplicate of MW-3, contained less than half of the inorganicanalytes that were detected in the associated environmental sample. None of the analytes detectedin MW-3 or MW-7 were at concentrations above drinking water standards. The duplicate of MW-6collected during Round 3 contained a low concentration of acetone, a common laboratory compound;the value for acetone in the associated environmental sample was rejected by the validator due to apoor laboratory response factor, a problem with laboratory instrument sensitivity.

Trip Blanks

Trip blanks were prepared by the CDM Federal ARCS II team at the start of each day on whichaqueous samples were collected for the analysis of VOCs. Trip blanks were used to determinewhether on-site atmospheric contaminants seeped into the sample vials, or if any cross-contaminationof samples occurred during shipment or storage of sample containers. A trip blank consists ofdemonstrated"a"nalyte-free water (based on TCL analysis results falling below Contract RequiredQuantitation Limits) sealed in a 40-ml Teflon septum vial with no headspace (including bubbles).Trip blanks were kept in close proximity to the samples being collected and were maintained at 4°Cand handled in the same manner as the other VOC aqueous samples. Trip blanks were analyzed bythe same VOC method with the associated set of VOC samples.

A total of seven trip blanks were collected during the pre-round spring and supply well samplingevent and the Rounds 1, 2, and 3 on-site monitoring well sampling events. A comparison of tripblanks and their associated samples during data validation revealed no significant problems with thedata. Acetone and 2-butanone were consistently rejected by the validator for the three on-sitesampling rounds because of poor response factor measurements. The trip blank for Round 3 wasfound to contain a low concentration of chloroform (a common laboratory compound),bromodichloromethane, tetrachloroethene, methylene chloride, and dibromochloromethane; none ofwhich exceeded their respective MCLs and none of which were detected in the trip blank's associatedenvironmental field sample.

Field Blanks

One field blank was collected for each equipment type per decontamination event and was analyzedfor the same constituents as the environmental samples. Field blanks, also know as "rinsate blanks"or "equipment blanks," are used to assess the effectiveness of equipment decontamination. Fieldblanks were collected before the use of the decontaminated equipment for sampling.

300998

Field blanks were generated by collecting the shown analyte-free water through the sampling pumpfor Round 1 (for three wells), Round 2, and Round 3 (for one well). Field blanks were collected fromone of the dedicated decontaminated Teflon bailers used in sample Rounds 3 and 4. Inasmuch aswater samples were collected directly into the sample containers during the off-site supply well andspring/seep sampling events, it was not necessary to collect field blanks for the "pre-round" samplingevent.

Of note, a field blank was not collected for the dedicated decontaminated Teflon bailers used tosample three of the wells in Round 1 (as discussed in Section 2.4). Six field blanks were collectedduring the four on-site RI sampling rounds. Field blanks were analyzed for the same parameters asthe corresponding environmental samples.

During Round 1, a field blank collected from the pump used to sample three of the wells haddetections of two semi-volatile organic compounds, dimethylphthalate and diethylphthalate; both ofwhich are laboratory reagents and neither of which were detected in the associated environmentalsamples. Neither volatile organic compounds nor pesticides/PCBs were detected in the field blank.Several inorganic contaminants (Al, Ba, Ca, Cu, Fe, Mg, Mn, Ni, K, Na, and Zn) detected in the fieldblank were identified at low concentrations between the instrument and contract required detectionlimits; however, lead also was detected sporadically at higher concentrations. Associatedenvironmental sample data were rejected for lead for MW-2 and MW-5 where values were up to fivetimes the blank concentration. These levels may reflect some contribution of lead to the samplethrough insufficient decontamination or from sample handling. Only the reported sampleconcentration for lead exceeding five times the field blank concentration in MW-1 was consideredto be part of trie sample matrix.

Three field blanks were collected during Round 2 sampling. Two semi-volatile compounds weredetected in two of the blanks, but they were not detected in the environmental samples. Severalinorganic contaminants (Al, Ba, Cu, Fe, Mn, and Zn) detected in the field blank were at lowconcentrations between the instrument and contract required detection limits. Notably, all leadresults for the field blank and associated environmental samples were rejected during validation dueto exceedances of the laboratory matrix spike recovery parameters. Also, associated sample datawere rejected for zinc and copper in the field blank for MW-3 and MW-5 where values were up tofive times the blank concentration.

Two field blanks were collected for Round 3 sampling, one blank from the pump used to sampleMW-4, the other blank for the Teflon bailers used to sample the other wells. Five volatile compoundwere detected in the bailer rinsate blank, none of which were detected in the associatedenvironmental samples. Three inorganic analytes (Cu, Pb, and Zn) were detected in the field blanksat low concentrations between the instrument and contract required detection limits. Lead wasdetected in the pump rinsate blank and its associated environmental sample value was rejectedbecause the value was below five times the blank concentration (for MW-4 only).

In Round 4, several inorganic contaminants (Al, Ba, Cr, Mn, Ni, and Zn) were detected in the fieldblank at low concentrations between the instrument and contract required detection limits.

300999

Matrix Spikes

Matrix spikes are laboratory QC samples drawn from excess volumes of existing samples todemonstrate the accuracy of laboratory analysis. In accordance with EPA's Region II CERCLA QAManual, COM Federal designated matrix spikes on environmental samples at a rate of one perSample Delivery Group (SDG). This designation was noted on the sample container labels and thesample paperwork. An SDG is defined as one of the following:

1. All samples of an analytical case if the sample number is less than 20 (includingenvironmental duplicates, but excluding QC blanks) and if sampling is completedwithin 14 calendar days.

2. Each group of 20 samples within an analytical case (including environmentalduplicates, but excluding QC blanks) if the number is greater than 20.

3. Each 14-calendar day period during which samples within an analytical case arereceived. This period begins with the receipt of the first sample in the SDG.

3001000

APPENDIX GCALCULATIONS DERIVING SAMPLE-SPECIFIC SURFACE WATER QUALITY

SCREENING CRITERIA

3001001

PROJECT. .JOB NO..COMPUTED BY

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3001004

APPENDIX HCOMPLETE ON-SITE GROUNDWATER ORGANIC AND INORGANIC ANALYTICAL

RESULTS

3001005

PRE-ROUND SAMPLING RESULTS:

SPRING/SEEPS AND MUNICIPAL WELLS

3001006

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V&M ALBADEJO NOTRESemi Volatile Organic Compounds

Pre-round Sampling

06/16/19983:09 PMPage 1

SAMPLE NAMESAMPLE DATETEXT 001

PHENOLBIS (2-CHLOROETHYL) ETHER2-CHLOROPHENOL1,3-DICHLOROBENZENE1,4-DICHLOROBENZINE1,2-DICHLOROBENZENE2-METHYLPHENOLBIS(2-CHLOROISOPROPYL)ETHER4 METHYLPHENOLN-NITROSO-DI-N-PROPYLAMINEHEXACHLOROETHANENITROBENZENEISOPHORONE2-NITROPHENOL2,4-DIMETHYLPHENOLBIS (2-CHLOROETHOXY) METHANE2,4-DICHLOROPHENOL1,2,4-TRICHLOROBENZENENAPHTHALENE4-CHLOROANILINEHEXACHLOROBUTADIENE4-CHLORO-3-METHYLPHENOL2-METHYLNAPHTHALENEHEXACHLOROCYCLOPENTADIENE2, 4, 6- TRI CHLOROPHENOL2,4,5-TRICHLOROPHENOL2-CHLORONAPHTHALENE2-NITROANILINEDIMETHYLPHTHALATEACENAPHTHYLENE2,6-DINITROTOLUENE3-NITROANILINEACENAPHTHENE

ug/lug/lug/lug/tug/lug/lug/lug/lug/lug/lug/lug/lug/lug/lug/lug/lug/lug/lug/lug/lug/lug/lug/lug/lug/lug/lug/lug/lug/lug/lug/lug/lug/l

SPRING-112/03/97

BSN86

10.00 U10.00 U10.00 U10.00 U10.00 U10.00 U10.00 U10.00 U10.00 U10.00 U10.00 U10.00 U10.00 U10.00 U10.00 U10.00 U10.00 U10.00 U10.00 U10.00 U10.00 U10.00 U10.00 u10.00 U10.00 U25.00 U10.00 U25.00 U10.00 U10.00 U10.00 U25.00 U10.00 u

SPRING-212/03/97

BSN87

10.00 U10.00 U10.00 U10.00 U10.00 U10.00 U10.00 U10.00 UJ10.00 U10.00 U10.00 U10.00 U10.00 U10.00 U10.00 U10.00 U10.00 U10.00 UJ10.00 U10.00 U10.00 U10.00 U10.00 U10.00 U10.00 U25.00 U10.00 U25.00 U10.00 U10.00 U10.00 U25.00 U10.00 u

TB- 12/04/97 UADP12/04/97 12/03/97

BSN95 BSN93

10.00 U10.00 U10.00 U10.00 U10.00 U10.00 u10.00 U10.00 UJ10.00 U10.00 U10.00 U10.00 U10.00 U10.00 U10.00 U10.00 U10.00 U10.00 UJ10.00 U10.00 U10.00 U10.00 U10.00 U10.00 U10.00 u25.00 U10.00 u25.00 U10.00 U10.00 U10.00 U25.00 U10.00 u

WAIF12/04/97

BSN92

10.00 U10.00 U10.00 U10.00 U10.00 U10.00 U10.00 U10.00 U10.00 U10.00 U10.00 U10.00 U10.00 U10.00 U10.00 U10.00 U10.00 U10.00 U10.00 U10.00 U10.00 U10.00 U10.00 U10.00 U10.00 U25.00 U10.00 U25.00 U10.00 U10.00 U10.00 U25.00 U10.00 u

WAN -212/04/97

BSN88

10.00 U10.00 U10.00 U10.00 U10.00 U10.00 U10.00 U10.00 U10.00 U10.00 U10.00 U10.00 U10.00 U10.00 U10.00 U10.00 U10.00 u10.00 U10.00 U10.00 U10.00 U10.00 u10.00 U10.00 u10.00 U25.00 U10.00 U25.00 U10.00 U10.00 U10.00 U25.00 U10.00 U


Pre-round Sampling

06/16/19983:09 PMPage 2

COOoMOHO


PHENOLBIS (2-CHLOROETHYL) ETHER2-CHLOROPHENOL1,3-DICHLOROBENZENE1,4-DICHLOROBENZINE1,2-DICHLOROBENZENE2-METHYLPHENOLBIS(2-CHLOROISOPROPYL)ETHER4 METHYLPHENOLN-NITROSO-DI-N-PROPYLAMINEHEXACHLOROETHANENITROBENZENEISOPHORONE2-NITROPHENOL2,4-DIMETHYLPHENOLBIS (2-CHLOROETHOXY) METHANE2,4-DICHLOROPHENOL1,2,4-TRICHLOROBENZENENAPHTHALENE4-CHLOROANILINEHEXACHLOROBUTADIENE4-CHLORO-3-METHYLPHENOL2-METHYLNAPHTHALENEHEXACHLOROCYCLOPENTAD I ENE2,4,6-TRICHLOROPHENOL2,4,5-TRICHLOROPHENOL2-CHLORONAPHTHALENE2-NITROANILINEDIMETHYLPHTHALATEACENAPHTHYLENE2,6-DINITROTOLUENE3-NITROANILINEACENAPHTHENE

ug/lug/lug/lug/lug/lug/lug/lug/lug/lug/lug/lug/lug/lug/lug/lug/lug/lug/lug/lug/lug/lug/lug/lug/lug/lug/lug/lug/tug/lug/lug/lug/lug/l

WAN -312/04/97

BSN89

10.00 U10.00 U10.00 U10.00 U10.00 U10.00 U10.00 U10.00 U10.00 U10.00 U10.00 U10.00 U10.00 U10.00 U10.00 U10.00 U10.00 u10.00 U10.00 U10.00 U10.00 U10.00 U10.00 U10.00 U10.00 U25.00 U10.00 U25.00 U10.00 U10.00 U10.00 U25.00 U10.00 U

WAN -412/04/97

BSN90

10.00 U10.00 U10.00 U10.00 U10.00 U10.00 U10.00 U10.00 U10.00 U10.00 U10.00 U10.00 U10.00 U10.00 U10.00 U10.00 U10.00 U10.00 U10.00 U10.00 U10.00 U10.00 U10.00 U10.00 U10.00 U25.00 U10.00 U25.00 U10.00 U10.00 U10.00 u25.00 U10.00 U

UARRZ12/04/97

BSN91

10.00 U10.00 U10.00 U10.00 U10.00 U10.00 U10.00 U10.00 U10.00 U10.00 U10.00 U10.00 U10.00 U10.00 U10.00 U10.00 u10.00 U10.00 U10.00 U10.00 U10.00 U10.00 U10.00 U10.00 U10.00 U25.00 U10.00 U25.00 U10.00 U10.00 U10.00 U25.00 U10.00 U

woo12/03/97

BSN94

10.00 U10.00 u10.00 U10.00 U10.00 U10.00 u10.00 U10.00 UJ10.00 U10.00 U10.00 U10.00 U10.00 U10.00 U10.00 U10.00 u10.00 U10.00 UJ10.00 U10.00 U10.00 U10.00 U10.00 U10.00 U10.00 u25.00 U10.00 U25.00 U10.00 U10.00 U10.00 U25.00 U10.00 U


Pre-round Sampling

06/16/19983:10 PMPage 1

WOOHOMM


2,4-DINITROPHENOL4-NITROPHENOLDIBENZOFURAN2,4-DINITROTOLUENEDIETHYLPHTHALATE4-CHLOROPHENYL-PHENYLETHERFLUORENE4-NITROANILINE4,6-DINITRO-2-METHYLPHENOLN-N1TROSODIPHENYLAMINE4-BROMOPHENYL-PHENYLETHERHEXACHLOROBENZENEPENTALCHLOROPHENOLPHENANTHRENEANTHRACENECARBAZOLEDI-N-BUTYLPHTHALATEFLUORANTHENEPYRENEBUTYLBENZYLPHTHALATE3,3'-DICHLOROBENZIDINEBENZO (A) ANTHRACENECHRYSENEBIS (2-ETHYLHEXYL) PHTHALATEDI-N-OCTYLPHTHALATEBENZO(B)FLUORANTHENEBENZO(K) FLUORANTHENEBENZO (A) PYRENEINDENO (1,2,3-CD) PYRENEDIBENZO (A,H) ANTHRACENEBENZO (G,H.l) PERYLENE

ug/lug/lug/lug/tug/lug/lug/lug/lug/lug/lug/lug/lug/lug/lug/lug/lug/lug/lug/lug/lug/lug/lug/lug/lug/lug/lug/lug/lug/lug/lug/l

SPRING-112/03/97

BSN86

25.00 UJ25.00 U10.00 U10.00 U10.00 U10.00 U10.00 U25.00 UJ25.00 U10.00 U10.00 U10.00 U25.00 UJ10.00 U10.00 U10.00 U10.00 u10.00 U10.00 U10.00 U10.00 U10.00 U10.00 U10.00 U10.00 U10.00 U10.00 U10.00 U10.00 U10.00 U10.00 U

SPRING-212/03/97

BSN87

25.00 U25.00 U10.00 U10.00 U10.00 U10.00 U10.00 U25.00 U25.00 U10.00 U10.00 U10.00 U25.00 U10.00 U10.00 U10.00 U10.00 U10.00 U10.00 U10.00 U10.00 U10.00 U10.00 U10.00 U10.00 U10.00 U10.00 U10.00 U10.00 U10.00 U10.00 U

TB- 12/04/97 WADP12/04/97 12/03/97

BSN95 BSN93


WAIF12/04/97

BSN92

25.00 UJ25.00 U10.00 U10.00 U10.00 U10.00 U10.00 u25.00 UJ25.00 U10.00 U10.00 U10.00 U25.00 UJ10.00 U10.00 U10.00 U10.00 U10.00 U10.00 U10.00 U10.00 U10.00 U10.00 U10.00 U10.00 U10.00 U10.00 U10.00 U10.00 U10.00 U10.00 U

WAN -212/04/97

BSN88

25.00 UJ25.00 U10.00 U10.00 U10.00 U10.00 U10.00 U25.00 UJ25.00 U10.00 U10.00 U10.00 U25.00 UJ10.00 U10.00 U10.00 U10.00 U10.00 U10.00 U10.00 u10.00 U10.00 U10.00 U1.00 J10.00 U10.00 U10.00 U10.00 U10.00 U10.00 U10.00 U


Pre-round Sampling

06/16/19983:10 PHPage 2

U)OOHOHto


2,4-DINITROPHENOL4-NITROPHENOLOIBENZOFURAN2,4-DINITROTOLUENEOIETHYLPHTHALATE4-CHLOROPHENYL-PHENYLETHERFLUORENE4-NITROANILINE4.6-DINITRO-2-METHYLPHENOLN-NITROSODIPHENYLAMINE4-BROMOPHENYL-PHENYLETHERHEXACHLOROBENZENEPENTALCHLOROPHENOLPHENANTHRENEANTHRACENECARBAZOLEDI-N-BUTYLPHTHALATEFLUORANTHENEPYRENEBUTYLBENZYLPHTHALATE3,3>-DICHLOROBENZIDINEBENZO (A) ANTHRACENECHRYSENEBIS (2-ETHYLHEXYL) PHTHALATEDI-N-OCTYLPHTHALATEBENZO(B)FLUORANTHENEBENZO(K) FLUORANTHENEBENZO (A) PYRENEINDENO (1,2,3-CD) PYRENEDIBENZO (A,H) ANTHRACENEBENZO (G,H,I) PERYLENE

ug/lug/lug/lug/lug/lug/lug/lug/lug/lug/lug/lug/lug/lug/lug/lug/lug/lug/lug/lug/lug/lug/tug/tug/lug/lug/lug/lug/lug/lug/lug/l

WAN -312/04/97

BSN89

25.00 UJ25.00 U10.00 U10.00 U10.00 U10.00 U10.00 U25.00 UJ25.00 U10.00 U10.00 U10.00 U25.00 UJ10.00 U10.00 U10.00 U10.00 U10.00 U10.00 U10.00 U10.00 U10.00 U10.00 U2.00 J10.00 U10.00 u10.00 U10.00 U10.00 U10.00 U10.00 U

WAN -412/04/97

BSN90

25.00 UJ25.00 U10.00 U10.00 U10.00 U10.00 U10.00 U25.00 UJ25.00 U10.00 U10.00 U10.00 U25.00 UJ10.00 U10.00 U10.00 U10.00 u10.00 U10.00 U10.00 U10.00 U10.00 U10.00 U3.00 J10.00 U10.00 U10.00 U10.00 U10.00 U10.00 U10.00 U

UARRZ12/04/97

BSN91

25.00 UJ25.00 U10.00 U10.00 U10.00 U10.00 U10.00 U25.00 UJ25.00 U10.00 U10.00 U10.00 U25.00 UJ10.00 U10.00 U10.00 U10.00 U10.00 U10.00 U10.00 U10.00 U10.00 U10.00 U1.00 J10.00 U10.00 U10.00 U10.00 U10.00 U10.00 U10.00 U

WDD12/03/97

BSN94


V&M ALBADEJO NOTREPesticides PCBs Organic Compounds

Pre-round Sampling

06/16/19984:21 PMPage 1


ALPHA-BHCBETA-BHCDELTA-BHCLINDANE, TOTALHEPTACHLORALDRINHEPTACHLOR EPOXIDEENOOSULFAN IDIELDRIN4,4'-DDEENDRIN, TOTALENDOSULFAN II4,4'-DDDENDOSULFAN SULFATE4,4'-DDTMETHOXYCHLORENDRIN KETONEENDRIN ALDEHYDEALPHA-CHLORDANEGAMMA- CHLORDANETOXAPHENEAROCLOR-1016AROCLOR-1221AROCLOR-1232AROCLOR-1242AROCLOR-1248AROCLOR-1254AROC LOR -1260

ug/lug/lug/lug/lug/lug/lug/lug/lug/lug/lug/lug/lug/lug/lug/lug/lug/lug/lug/lug/lug/lug/lug/lug/lug/lug/lug/lug/l

SPRING-112/03/97

BSN86

0.050 U0.050 U0.050 U0.050 U0.050 U0.050 U0.050 U0.050 U0.100 U0.100 U0.100 U0.100 U0.100 U0.100 U0.100 U0.500 U0.100 U0.100 U0.050 U0.050 U5.000 U1.000 U2.000 U1.000 U1.000 u1.000 U1.000 U1.000 U

SPRING-2 TB-12/04/9712/03/97 12/04/97

BSN87 BSN95

0.050 U0.050 U0.050 U0.050 U0.050 U0.050 U0.050 U0.050 U0.100 U0.100 U0.100 U0.100 U0.100 U0.100 U0.100 U0.500 U0.100 U0.100 U0.050 U0.050 U5.000 U1.000 U2.000 U1.000 U1.000 u1.000 U1.000 U1.000 U

UADP12/03/97

BSN93

0.050 U0.050 U0.050 U0.050 U0.050 U0.050 U0.050 U0.050 U0.100 U0.100 U0.100 U0.100 U0.100 U0.100 U0.100 U0.500 U0.100 U0.100 U0.050 U0.050 U5.000 U1.000 U2.000 U1.000 U1.000 U1.000 U1.000 U1.000 U

WAIF12/04/97

BSN92

0.050 U0.050 U0.050 U0.050 U0.050 U0.050 U0.013 J0.050 U0.1400.100 U0.100 U0.100 U0.100 U0.100 U0.100 U0.500 U0.011 J0.100 U0.050 U0.050 U5.000 U1.000 U2.000 U1.000 U1.000 U1.000 U1.000 U1.000 u

WAN -212/04/97

BSN88

0.050 U0.050 U0.050 U0.050 U0.050 U0.050 U0.050 U0.050 U0.100 U0.100 U0.100 U0.100 U0.100 U0.100 U0.100 U0.500 U0.100 U0.100 U0.050 U0.050 U5.000 U1.000 U2.000 U1.000 U1.000 U1.000 U1.000 U1.000 u

U)ooHOHU>

V&M ALBADEJO NOTREPesticides PCBs Organic Compounds

Pre-round Sampling

06/16/19984:21 PMPage 2


ALPHA-BHCBETA-BHCDELTA-BHCLINDANE, TOTALHEPTACHLORALDRINHEPTACHLOR EPOXIDEENDOSULFAN IDIELDRIN4,4'-DDEENDRIN, TOTALENDOSULFAN II4,4'-DDDENDOSULFAN SULFATE4,4'-DDTMETHOXYCHLORENDRIN KETONEENDRIN ALDEHYDEALPHA-CHLORDANEGAMMA-CHLORDANETOXAPHENEAROCLOR-1016AROCLOR-1221AROCLOR-1232AROCLOR-1242AROCLOR-1248AROCLOR-1254AROCLOR-1260

ug/lug/lug/lug/lug/lug/lug/lug/lug/lug/lug/lug/lug/lug/lug/lug/lug/lug/lug/lug/lug/lug/lug/lug/lug/lug/lug/lug/l

WAN -312/04/97

BSN89

0.050 U0.050 U0.050 U0.050 U0.050 U0.050 U0.050 U0.050 U0.025 J0.100 U0.100 U0.100 U0.100 U0.100 U0.100 U0.500 U0.100 U0.100 U0.050 U0.050 U5.000 U1.000 U2.000 U1.000 U1.000 U1.000 U1.000 U1.000 U

WAN -412/04/97

BSN90

0.050 U0.050 U0.050 U0.050 U0.050 U0.050 U0.050 U0.050 U0.014 J0.100 U0.100 U0.100 U0.100 U0.100 u0.100 U0.500 U0.100 U0.100 U0.050 U0.050 U5.000 U1.000 U2.000 U1.000 U1.000 U1.000 U1.000 U1.000 U

UARRZ12/04/97

BSN91

0.050 U0.050 U0.050 U0.050 U0.050 U0.050 U0.050 U0.050 U0.067 J0.100 U0.100 U0.100 U0.100 U0.100 U0.100 U0.500 U0.100 U0.100 U0.050 U0.050 U5.000 U1.000 U2.000 U1.000 U1.000 U1.000 U1.000 U1.000 U

woo12/03/97

BSN94

0.050 U0.050 U0.050 U0.050 U0.050 U0.050 U0.050 U0.050 U0.100 U0.100 U0.100 U0.100 U0.100 U0.100 U0.100 U0.500 U0.100 U0.100 U0.050 U0.050 U5.000 U1.000 U2.000 U1.000 U1.000 U1.000 U1.000 U1.000 U

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UJoooI-1Ul

V&M ALBADEJO NOTREInorganic AnalytesPre-round Sampling

06/16/19984:36 PMPage 1


Inorganic AnalytesALUMINUMANTIMONYARSENICBARIUMBERYLLIUMCADMIUMCALCIUMCHROMIUMCOBALTCOPPERIRONLEADMAGNESIUMMANGANESEMERCURYNICKELPOTASSIUMSELENIUMSILVERSODIUMTHALLIUMVANADIUMZINCCYANIDE

ug/lug/lug/lug/lug/lug/lug/lug/lug/lug/lug/lug/lug/lug/lug/lug/lug/lug/lug/lug/lug/lug/lug/lug/l

SPRING-112/03/97MBGQ36

271.0050.00 U1.00 U19.60 B1.00 U2.00 U

82,800.005.00 U3.00 U2.00 U

381.001.50 B

5,600.0011.90 B0.10 U10.00 U

1,850.00 B1.00 U3.00 U

15,500.001.00 U3.00 U4.00 U5.00 U

SPRING-212/03/97MBGU37

26.80 B50.00 U1.00 U20.00 B1.00 U2.00 U

104,000.005.00 U3.00 U2.00 U51.70 B1.00 B

6,030.003.30 B0.10 U10.00 U

3,640.00 B1.00 U3.00 U

15,300.001.00 U3.40 B4.60 B5.00 U

TB- 12/04/97 UADP12/04/97 12/03/97

MBGW43

20.00 U50.00 U1.00 U17.10 B1.00 U2.00 U

64,200.005.00 U

v, 3.00 U\X> 2.00 UV 20.00 U

2.90 B21,600.00

1.40 B0.10 U10.00 U

1,240.00 B1.00 U3.00 U

9,000.001.00 U3.00 U

173.005.00 U

WAIF12/04/97MBGU42

20.00 U50.00 U1.00 U13.10 B1.00 U2.00 U

82,300.005.00 U3.00 U2.00 U21.20 B2.00 B

3,590.00 B1.00 U0.10 U10.00 U696.00 B1.00 U3.00 U

8,690.001.00 U3.00 U6.70 B5.00 U

WAN -212/04/97MBGU38

20.00 U50.00 U1.00 U14.70 B1.00 U2.00 U

99,300.005.00 U3.00 U3.60 B

110.003.40

6,150.001.00 U0.10 U10.00 U

1,010.00 B1.00 U3.00 U

12,200.001.00 U3.00 U6.00 B5.00 U

V&M ALBADEJO NOTREInorganic AnalytesPre-round Sampling

06/16/19984:36 PMPage 2




WAN -312/04/97MBGU39

20.00 U50.00 U1.00 U10.80 B1.00 U2.00 U

99,600.005.00 U3.00 U10.90 B20.00 U8.30

3,480.00 B1.00 U0.10 U10.00 U

1,150.00 B1.00 U3.00 U

12,400.001.00 U3.00 U5.80 B5.00 U

WAN -412/04/97MBGW40

25.90 B50.00 U1.00 U11.20 B1.00 U2.00 U

101,000.005.00 U3.00 U27.8025.50 B9.50

3,570.00 B1.00 U0.10 U10.00 U960.00 B

1.00 U3.00 U

12,600.001.00 U3.00 U8.80 B5.00 U

WARRZ12/04/97MBGW41

20.00 U50.00 U1.00 U

13.10 B1.00 U2.00 U

83,700.005.00 U3.00 U4.50 B20.00 U3.40

4,130.00 B1.00 U0.10 U10.00 U847.00 B

1.00 U3.00 U

7,480.001.00 U3.00 U4.80 B5.00 U

UDD12/03/97MBGW44

20.00 U50.00 U1.00 U13.70 B1.00 U2.00 U

72,200.005.00 U3.00 U6.30 B20.00 U1.00 U

24,700.001.00 U0.10 U10.00 U

1,240.00 B1.00 U3.00 U

8,270.001.00 U3.80 B19.60 B5.00 U

tooo

UNITED STATES ENVIRONMENTAL PROTECTION AGENCY3 REGION IIf EDISON, NEW JERSEY O8837

. .Mr. Scott F. Kirschner "~~ — """"CDM-FPC107-F Corporate Blvd.South Plainfield, NJ 07080

Dear Mr. Kirschner:

Enclosed are the results of the V & M Albadejo sampling surveyconducted by your firm during the week of December 1,1997. Thesedata include the results of nine water samples for various waterquality analyses. Any correspondence concerning these resultsshould refer to our internal project number, 688, to uniquelyidentify it. Please refer to the first page of the report for adescription of any remark codes used as data qualifiers. Itshould be noted that all data are considered EPA-validated.

If you have any questions you can contact me by phone at (732)906-6886 or FAX at (732) 321-6613 or via the Internet at"birri. [email protected]".

Sincerely ,.

John/BirriSpe/ial Projects CoordinatorLalooratory Branch

Enclosure

cc: Caroline Kwan-Appleman,(ERRD) w/enc,

3001017NTED ON RECYCLED PAPER

LAB DATA MANAGEMENT SYSTEM - REGION IICOMPLETED PROJECT APPROVAL REPORT DATE 98/01/08

PROJECT NUMBER PROJECT DATE PROJECT NAME

688 97/12/04 V & M ALBADEJO - ' APPROVEDjJ-

0f'

(A)OOI-1OHCO

PROJECT NO: 688

REMARK CODE

BJKLN0TU

CODE

QDQEOFQJQGOSORQPOHQTOHOBQQ

COMPLETED ANALYSIS REPORT

PROJECT NAME: V & M ALBADEJO

EXPLANATIONS OF REMARK CODES

EXPLANATION

RESULTS BASED UPON COLONY COUNTS OUTSIDE ACCEPTABLE RANGEESTIMATED VALUEACTUAL VALUE KNOWN TO BE LESS THAN VALUE GIVENACTUAL VALUE KNOWN TO BE GREATER THAN VALUE GIVENNO OBSERVABLE EFFECT CONCENTRATION < 0.3%SAMPLED BUT NOT ANALYZED DUE TO LAB ACCIDENTREPORTED VALUE LESS THAN CRITERIA OF DETECTIONREPORTING L I M I T

PAGE 1

REPORT DATE: 98/01/08

UA/QC REMARK CODES

EXPLANATION

ACCURACY CHECK SAMPLE ABOVE UPPER ACCEPTANCE LIMITACCURACY CHECK SAMPLE BELOW LOWER ACCEPTANCE LIM I TPRECISION OF CALIBRATION CURVE LESS THAN ACCEPTANCE CRITERIAESTIMATED DETECTION LIMIT DUE TO INTERFERENCECONTINUING CALIBRATION CHECK DOES NOT MEET ACCEPTANCE CRITERIASPIKE RECOVERIES ABOVE UPPER ACCEPTANCE LIMITSPIKE RECOVERIES BELOW LOWER ACCEPTANCE LIMITSAMPLE REPLICATE PRECISION DOES NOT MEET ACCEPTANCE CRITERIARECOMMENDED HOLDING TIMES EXCEEDEDTENTATIVELY IDENTIFIED COMPOUNDPRESENCE OF MATERIAL VERIFIED BUT NOT QUANTIFIEDBLANK CONTAMINATED BY ANALYTE IN EXCESS OF ACCEPTANCE CRITERIASAMPLE IMPROPERLY PRESERVED

LOCATION CODES FOR IDENTIFICATION OF SAMPLING POINTS AT INDUSTRIAL /SANITARY FACILITIES, LANDFILLS, HAZARDOUS WASTE SITES.

CODE NUMBERS

1001 - 10501051 - 1099

OOHOHVO

1100143515XX200030003100320033003400350036003700

12491454

30993199329933993499359936993799

SAMPLING POINTS

EFFLUENT PIPE NUMBER 001 TO 050OTHER EFFLUENTS SUCH AS COOLING TOWER DISCHARGE,DISCHARGE FROM HOLDING PONDS, ETC...IN PLANT SAMPLESSEPARATE INFLUENT POINTS/WATER SOURCESINFLUENT ASSOCIATED WITH EFFLUENT 10XXBLANK FOR VOLATILE ORGAN ICSGROUND WATER FROM WELL 01 TO 99SEDIMENT SAMPLE (WATER BOTTOM)SOIL SAMPLESTREAM WATER SAMPLELAGOON SAMPLESTORAGE TANK SAMPLELEACHATE SAMPLEOTHER TYPE SAMPLE

PROJECT NO: 688

STATION NODATE TIMEFROM OfTO DAY


PROJECT NAME: V & H ALBADEJO

LABNO PARNO PARAMETER NAME

PAGE 2


VALUE & QA/QCUNITS CHEMISTRY REMARK REMARK

UAIF 97/12/04 1000DEPTH:'0000 SUBSTRATE: AQUEOUSDESCRIPTION: GROUNDUATER COLLECTED

FROM TAP ON WELL

UAN2 97/12/04 1400DEPTH: 0000 SUBSTRATE: AQUEOUSDESCRIPTION: GROUNDUATER COLLECTED

FROM TAP ON WELL


FROM TAP ON UELL

UARRZ 97/12/04 1430DEPTH: 0000 SUBSTRATE: AQUEOUSDESCRIPTION: GROUNDUATER COLLECTED

FROM TAP ON UELL

204701 00430 ALKALINITY, CARBONATE MG/L 400425 ALKALINITY, BICARBONATE MG/L 19100940 CHLORIDE MG/L 14.500945 SULFATE MG/L 3.400630 NITROGEN, NITRATE + NITRITE MG/L 6.570301 TOTAL DISSOLVED SOLIDS MG/L TOTAL 17200530 RESIDUE, NONFILTERABLE MG/L 4

204702 00430 ALKALINITY, CARBONATE HG/L 4 U00425 ALKALINITY, BICARBONATE MG/L 24800940 CHLORIDE MG/L 22.000945 SULFATE MG/L 5.100630 NITROGEN, NITRATE + NITRITE MG/L 4.870301 TOTAL DISSOLVED SOLIDS HG/L TOTAL 30700530 RESIDUE, NONFILTERABLE MG/L 4 U

204703 00430 ALKALINITY, CARBONATE MG/L ' 4 U00425 ALKALINITY, BICARBONATE HG/L 23600940 CHLORIDE MG/L 21.800945 SULFATE MG/L 5.800630 NITROGEN, NITRATE + NITRITE MG/L 6.470301 TOTAL DISSOLVED SOLIDS MG/L TOTAL 31700530 RESIDUE, NONFILTERABLE MG/L 4U

204704 00430 ALKALINITY, CARBONATE HG/L 4 U00425 ALKALINITY, BICARBONATE HG/L 19500940 CHLORIDE HG/L 14.000945 SULFATE MG/L 5.300630 NITROGEN, NITRATE + NITRITE MG/L 6.3

OOHOtoO

PROJECT NO: 688

STATION NODATE TIMEFROM OFTO DAY

COMPLETED ANALYSIS REPORT v

PROJECT NAME: V 4 H ALBADEJO


PAGE 3




FROM TAP ON WELL-DUPLICATE OF UAN3

SPRING #1 97/12/03 0900DEPTH: 0000 SUBSTRATE: AQUEOUSDESCRIPTION: GROUNDUATER FROM SPRING

SPRING #2 97/12/03 0930DEPTH: 0000 SUBSTRATE: AQUEOUSDESCRIPTION: GROUNDUATER FROM SPRING

204704 70301 TOTAL DISSOLVED SOLIDS MG/L TOTAL 24200530 RESIDUE, NONFILTERABLE MG/L 4 U

204705 00430 ALKALINITY, CARBONATE MG/L 4 U00425 ALKALINITY. BICARBONATE MG/L 23800940 CHLORIDE MG/L 21.700945 SULFATE MG/L 5.800630 NITROGEN, NITRATE + NITRITE HG/L 6.470301 TOTAL DISSOLVED SOLIDS MG/L TOTAL 31200530 RESIDUE, NONFILTERABLE MG/L 4 U

204707 00430 ALKALINITY, CARBONATE MG/L 4 U00425 ALKALINITY, BICARBONATE MG/L 20900940 CHLORIDE MG/L 30.100945 SULFATE MG/L 12.500630 NITROGEN, NITRATE + NITRITE HG/L 0.6970301 TOTAL DISSOLVED SOLIDS MG/L TOTAL 24900530 RESIDUE, NONFILTERABLE HG/L 8

204708 00430 ALKALINITY, CARBONATE MG/L 4 U00425 ALKALINITY. BICARBONATE HG/L 25100940 CHLORIDE HG/L 30.600945 SULFATE HG/L 20.600630 NITROGEN, NITRATE + NITRITE HG/L 1,470301 TOTAL DISSOLVED SOLIDS HG/L TOTAL 33200530 RESIDUE, NONFILTERABLE MG/L 4 U

OOHOto

PROJECT NO: 688

TAT ION NODATEFROMTO

TIMEOF

DAY


PROJECT NAME: V & H ALBADEJO


PAGE It



DP 97/12/03 1220PTH: 0000 SUBSTRATE: AQUEOUSSCRIPTION: GROUNDWATER COLLECTED

FROM TAP ON UELL

) 97/12/03 1330>TH: 0000 SUBSTRATE: AQUEOUSSCRIPTION: GROUNDUATER COLLECTED

FROM TAP ON UELL

204709 00430 ALKALINITY, CARBONATE MG/L00425 ALKALINITY, BICARBONATE MG/L00940 CHLORIDE MG/L00945 SULFATE HG/L00630 NITROGEN, NITRATE + NITRITE HG/L70301 TOTAL DISSOLVED SOLIDS MG/L TOTAL00530 RESIDUE, NONFILTERABLE MG/L

204710 00430 ALKALINITY, CARBONATE MG/L00425 ALKALINITY. BICARBONATE MG/L00940 CHLORIDE MG/L00945 SULFATE MG/L00630 NITROGEN, NITRATE + NITRITE MG/L70301 TOTAL DISSOLVED SOLIDS MG/L TOTAL00530 RESIDUE, NONFILTERABLE MG/L

4 U24715.57.81.72714 U

427213.410.61.32844

END OF PROJECT

U>OoHOtoK)

ROUND 1 ON-SITE SAMPLING RESULTS

3001023

V & M ALBALABEJO NORTEVolatile Organic Compounds

Round 1 Sampling

08/05/19983:05 PMPage 1

ooh-»oto


CHLOROMETHANEBROMOME THANEVINYL CHLORIDECHLOROETHANEMETHYLENE CHLORIDEACETONECARBON DISULFIDE1,1-DICHLOROETHENE1,1 -D I CHLOROETHANEcis-1,2-Dichloroethene1,2-TRANS-DICHLOROETHYLENECHLOROFORM1,2-DICHLOROETHANE2-BUTANONEBromochloromethane1,1,1 -TRICHLOROETHANECARBON TETRACHLORIDEBROMOD I CHLOROMETHANE1, 2-DICHLOROPROPANEcis 1,3-DICHLOROPROPENETRICHLOROETHYLENED I BROMOCHLOROMETHANE1,1,2-TRICHLOROETHANEBENZENETrans 1,3-DICHLOROPROPENEBROMOFORM4-METHYL-2-PENTANONE2-HEXANONETETRACHLOROETHYLENE1 , 1 ,2, 2-TETRACHLOROETHANE1 ,2-DibromoethaneTOLUENECHLOROBENZENEETHYLBENZNESTYRENEXYLENES (TOTAL)1,3-DICHLOROBENZENE1,4-DICHLOROBENZINE1,2-DICHLOROBENZENE1 ,2-Dibromo-3-chloropropane1,2, 4- TR I CHLOROBENZENE

ug/lug/lug/lug/lug/lug/lug/lug/lug/lug/lmg/lug/lug/lug/lug/lug/lug/lug/lug/lug/lug/lug/lug/lug/lug/lug/lug/lug/lug/lug/lug/lug/lug/lug/lug/lug/lug/lug/lug/lug/lug/l

MU-1-R104/02/98

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MU-2-R104/02/98

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08/06/199810:25 AMPage 1

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MU-1-R104/02/98MBOQ69

68.40 B3.10 UJ3.10 U43.30 B0.10 U2.30 B

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128.00 *J122.0056.90 *J

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MW-2-R104/02/98MBQQ68

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MW-3-R104/01/98MBQQ67

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60,500.00 EJ2.50 B1.20 U11.80 B*J53.80 BR

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2,850.00 BE2.00 U0.80 U

23,000.004.60 U1.00 BR0.50 U

MW-6-R104/01/98MBQQ64

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11,500.004.60 U2.10 BR0.50 U


08/05/19983:06 PM

Page 2

COOOMOU)




MW-7-R104/02/98MBQQ70

14.90 U3.10 UJ3.10 U0.40 U3.00 B0.30 U26.40 UEJ0.60 U1.20 U0.80 U*J

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FB-04/02/98-R1 TB-04/01/98-R1 TB-04/02/98-R104/02/98 04/01/98 04/02/98MBQQ73

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148.00 BE2.00 U0.80 U

226.00 B4.60 U0.80 U

50.10 EJ0.50 U

UNITED STATES ENVIRONMENTAL PROTECTION AGENCYREGION II

EDISON. NEW JERSEY OQB37

CDM-FPC107-F Corporate Blvd.South Plainfield, NJ 07080Attn: Scott Kirchner

Dear Mr. Kirchner:

Enclosed are the results of the V&M Farms sampling survey Conducted by your firm during theweek of March 30, 1998. These data include the results of seven samples for various wetchemical analyses. Any correspondence concerning these results should refer to our internalproject number, 766, to uniquely identify it. Please refer to the first page of the report for adescription of any remark codes used as data qualifiers. It should be noted that all data areconsidered to be EPA- validated.

If you have any questions you can contact me by phone at (732) 906-6886, by fax at (732) 321-6613 or via the Internet at "[email protected]".

Sincerely,

John BirriSpecial Projects CoordinatorLaboratory Branch

Enclosure

cr.

3001032

PROJEC. ..I

IAB DATA MANAGEMENT SYSTEM - REGION IICOMPLETED PROJECT APPROVAL

UMBER

766

PROJECT DATE

98/04/01

PROJECT NAME

V&M FARMS

REPORT DATE 98/05/08

APPROVED

10ooMOU)U)

PROJECT NO: 766

COMPLETED A N A I Y S I S REPORI

P R O J E C I N A M E : VSM F A R M S

, PAGE 1

REPORI DATE: 98/05/08

REMARK CODE

BJKIN0TU

CODE

QOQEOFQJOGOSORQPQHQTQMQBQQ

E X P 1 A N A T I O N S OF REMARK COOES


R E S U L T S BASED UPON COLONr COUNTS OUTSIDE ACCEPTABLE RANGEE S T I M A T E D VALUEACTUAL VALUE KNOWN TO BE LESS THAN VALUE G I V E NA C T U A L VALUE KNOWN TO BE G R E A T E R THAN VALUE G I V E NNO OBSERVABLE EFFECT CONCENTRATION < 0.3XSAMPLED BUT NOT ANALYZED DUE TO LAB ACCIDENTREPORTED VALUE LESS THAN C R I T E R I A OF D E T E C T I O NREPORTING L I M I T

QA/QC REMARK COOES


ACCURACY CHECK SAMPlE ABOVE UPPER ACCEPTANCE L I M I TACCURACY CHECK SAMPLE BELOW LOWER ACCEPTANCE L I M I TPRECISION OF CALIBRATION CURVE LESS THAN ACCEPTANCE C R I T E R I AE S T I M A T E D DETECTION L I M I T DUE TO I N T E R F E R E N C EC O N T I N U I N G C A L I B R A T I O N CHECK DOES NOT MEET ACCEPTANCE C R I T E R I ASPIKE RECOVERIES ABOVE UPPER ACCEPTANCE L I M I TSPUE RECOVERIES BELOW LOWER ACCEPTANCE L I M I TSAMPLE REPLICATE PRECISION DOES NOT MEET ACCEPTANCE C R I T E R I ARECOMMENDED HOLDING TIMES EXCEEDEDT E N T A T I V E L Y I D E N T I F I E D COMPOUNDPRESENCE OF MATERIAL V E R I F I E D BUT NOT QUANTIFIEDBLANK CONTAMINATED BY A N A L Y T E IN EXCESS OF ACCEPTANCE C R I T E R I ASAMPLE IMPROPERLY PRESERVED

LOCATION CODES FOR I D E N T I F I C A T I O N OF SAMPLING POINTS AT INDUSTRIAL /S A N I T A R Y F A C I L I T I E S , L A N D F I L L S . HAZARDOUS WASTE SITES.

CODE NUMBERS

OJOoHOU)

10011051

1100143515XX200030003100320033003400350036003700

10501099

12491454

30993199329933993499359936993799

SAMPLING POINTS

E F F L U E N T PIPE NUMBER 001 TO 050OTHER E F F L U E N T S SUCH AS COOLING TOWER DISCHARGE,DISCHARGE FROM HOLDING PONDS, ETC...IN PLANT SAMPLESSEPARATE INFLUENT POINTS/WATER SOURCESINF L U E N T ASSOCIATED W I T H E F F L U E N T 10XXBLANK FOR VOLATILE ORGANICSGROUND WATER FROM WELL 01 TO 99SEDIMENT SAMP1E (WATER BOTTOM)SOIL SAMPLESTREAM WATER SAMPLELAGOON SAMPLESTORAGE TANK SAMPLELEACHA1E SAMPLEOTHER TYPE SAMPLE

PROJECI NO: 766

AI ION NODATEFROMTO

IIMEOF

DAY


PROJECT NAME: VSM FARMS


, PACE 2


VAIUE & OA/QCUNITS CHEMISTRY REMARK REMARK

<. 98/04/01 1100MPOSI1E 98/04/01 1100TH: 0000 SUBSTRATE: AQUEOUSCRIPTION: CROUNDUATER COLLECTED VIA THE LOW F

LOW METHOD

98/04/01 1430IPOSI1E 98/04/01 1430H: 0000 SUBSTRATE: AOUEOUSRIPTION: CROUNOWATER COLLECTED VIA THE LOW F

LOW METHOD

98/04/01 1800I: 0000 SUBSTRATE: AOUEOUSOPTION: MW-3

98/04/02 0900: 0000 SUBSTRATE: AOUEOUSIPTION: MU-2

205217 70301 TOTAL DISSOLVED SOLIDS MG/L TOTAL00530 RESIDUE, NONFILTERABLE HG/L00940 CHLORIDE HG/L00425 ALKALINITY, BICARBONATE MG/L00430 ALK A L I N I T Y , CARBONATE MG/L00630 NITROGEN, NITRATE * NITRITE MG/L00945 SULFATE MG/L

20521B 70301 TOTAL DISSOLVED SOLIDS MG/L TOTAL00530 RESIDUE, NONFILTERABLE HG/L00940 CHLORIDE MG/L00425 ALKALINITY, dICARBONATE HG/L00430 ALKALINITY, CARBONATE HG/L00630 NITROGEN, NITRATE * NITRITE MG/L00945 SULFATE HG/L

205219 70301 TOTAL DISSOLVED SOLIDS HG/L TOTAL00530 RESIDUE, NONFILTERABLE MG/L00940 CHLORIDE HG/L00425 ALKALINITY, BICARBONATE HG/L00430 ALKALINITY, CARBONATE MG/L00630 NITROGEN, NITRATE + NITRITE HG/L00945 SULFATE HG/L

205220 70301 TOTAL DISSOLVED SOLIDS MG/L TOTAL00530 RESIDUE, NONFILTERABLE HG/L00940 CHLORIDE MG/L

322100

16.12364 U

1.67.3

29713

22.22204 U

1.412.0

31140

22.52184 U

1.18.7

3594 U

30.0

WOoHO

ui

PROJECT NO: 766

A II ON NOI

DAIE IIMEFROM OFTO DA*

COMPUTED ANALYSIS REPORT

PROJECT NAME: VSM FARMS


. PAGE 3

REPORT DAIE: 98/05/08

VALUE S QA/QCUNITS CHEMISTRY REMARK REMARK

T 98/04/02 1000TH: 0000 SUBSTRATE: AQUEOUSRIPTION: MU-7

98/04/02 1215H: 0000 SUBSTRATE: AQUEOUSRIPTION: MU 1

98/04/02 1515\\ 0000 SUBSTRATE: AQUEOUSiIPTION: MU-5

205220 00425 ALKALINITY, BICARBONAIE MG/L00430 A L K A L I N I T Y , CARBONATE MG/L00630 NITROGEN, N I T R A T E * N I T R I T E HG/L00945 SULFATE MG/L

205221 70301 TOTAL DISSOLVED SOLIDS MG/L TOTAL00530 RESIDUE, NONFILIERABLE MG/L00940 CHLORIDE MG/L00425 AL K A L I N I T Y , BICARBONATE MG/L00430 ALKALINITY, CARBONATE MG/L00630 NITROGEN, NITRATE + NITRITE MG/L00945 SULFATE HG/L

205222 70301 TOTAL DISSOLVED SOLIDS MG/L TOTAL00530 RESIDUE, NONFILTERABLE HG/L00940 CHLORIDE HG/L00425 AL K A L I N I T Y , BICARBONATE MG/L00430 ALKALINITY, CARBONATE HG/L00630 NITROGEN, NITRATE * NITRITE HG/L00945 SULFATE HG/L

205223 70301 TOTAL DISSOLVED SOLIDS MG/L TOTAL00530 RESIDUE, NONFILTERABLE MG/L00940 CHLORIDE HG/L00425 ALKALINITY, BICARBONATE HG/L00430 ALKALINITY, CARBONATE HG/L00630 NITROGEN, NITRATE + N I T R I T E HG/L00945 SULFATE MG/L

2564 U

0. 1 U34. J

3714 U

30.42544 U

0. 1 U34.8

3254 U

12.42754 U

0.1 U16.1

3564 U

24.52584 U

0.1 U33.7

END OF PROJECT

U)ooHoW

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Round 2 Sampling

08/06/19982:19 PM

Page 2


CHLOROMETHANEBROMOME THANEVINYL CHLORIDECHLOROETHANEMETHYLENE CHLORIDEACETONECARBON DISULF1DE1,1-DICHLOROETHENE1,1-DICHLOROETHANEcis-1,2-Dichloroethene1,2-TRANS-DICHLOROETHYLENECHLOROFORM1,2-DICHLOROETHANE2-BUTANONEBromoch I oromethane1,1,1-TR I CHLOROETHANECARBON TETRACHLORIDEBROMODICHLOROMETHANE1,2-DICHLOROPROPANEcis 1,3-DICHLOROPROPENETRICHLOROETHYLENED I BROMOCHLOROMETHANE1,1,2-TRICHLOROETHANEBENZENETrans 1,3-DICHLOROPROPENEBROMOFORM4-METHYL-2-PENTANONE2-HEXANONETETRACHLOROETHYLENE1 , 1 , 2, 2-TETRACHLOROETHANE1 ,2-DibromoethaneTOLUENECHLOROBENZENEETHYLBENZNESTYRENEXYLENES (TOTAL)1,3-DICHLOROBENZENE1,4-DICHLOROBENZENE1,2-DICHLOROBENZENE1,2-Dibromo-3-chloropropane1,2,4-TRICHLOROBENZENE


MW-7-R205/19/98

BSD83

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SPRING-1-R205/21/98

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FB-05/18/98-R205/18/98

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FB-05/19/98-R205/19/98

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toooHOU)10

V & H ALBALABEJO NORTEVolatile Organic Compounds

Round 2 Sampling

08/06/19982:19 PH

Page 3

ooI-1orfkO


CHLOROMETHANEBROMOME THANEVINYL CHLORIDECHLOROETHANEMETHYLENE CHLORIDEACETONECARBON DISULFIDE1,1-DICHLOROETHENE1,1-DICHLOROETHANEcis-1,2-Dichloroethene1 ,2-TRANS-DICHLOROETHYLENECHLOROFORM1,2-D I CHLOROETHANE2-BUTANONEBromochloromethane1,1,1-TRICHLOROETHANECARBON TETRACHLORIDEBROMOD I CHLOROMETHANE1,2-DICHLOROPROPANECIS 1,3-DICHLOROPROPENETRICHLOROETHYLENED I BROMOCHLOROMETHANE1,1,2-TRICHLOROETHANEBENZENETrans 1,3-DICHLOROPROPENEBROMOFORM4-METHYL-2-PENTANONE2-HEXANONETETRACHLOROETHYLENE1 , 1 ,2,2-TETRACHLOROETHANE1 ,2-DibromoethaneTOLUENECHLOROBENZENEETHYLBENZNESTYRENEXYLENES (TOTAL)1,3-DICHLOROBENZENE1,4-DICHLOROBENZENE1,2-DICHLOROBENZENE1 ,2-Dibromo-3-chloropropane1,2,4-TRICHLOROBENZENE


TB-05/19/98-R205/19/98

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TB-05/20/98-R205/20/98

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Round 2 Sampling

08/07/19982:51 PM

Page 1

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Semi-Volati le Compounds -Page2,4-DINITROPHENOL4-NITROPHENOLDIBENZOFURAN2,4-DINITROTOLUENEDIETHYLPHTHALATE4-CHLOROPHENYL-PHENYLETHERFLUORENE4-NITROANILINE4.6-DINITRO-2-METHYLPHENOLN-NITROSOD I PHENYLAMINE4-BROMOPHENYL-PHENYLETHERHEXACHLOROBENZENEPENTALCHLOROPHENOLPHENANTHRENEANTHRACENECARBAZOLEDI-N-BUTYLPHTHALATEFLUORANTHENEPYRENEBUTYLBENZYLPHTHALATE3,3'-DICHLOROBENZIDINEBENZO (A) ANTHRACENECHRYSENEBIS (2-ETHYLHEXYL) PHTHALATEDI-N-OCTYLPHTHALATEBENZO(B)FLUORANTHENEBENZO(K) FLUORANTHENEBENZO (A) PYRENEINDENO (1,2,3-CD) PYRENEDIBENZO (A,H) ANTHRACENEBENZO (G,H,I) PERYLENE

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Round 2 Sampling

08/07/19982:51 PM

Page 2


Semi -Volatile Compounds -Page 22,4-DINITROPHENOL4-NITROPHENOLDIBENZOFURAN2,4-DINITROTOLUENEDIETHYLPHTHALATE4-CHLOROPHENYL-PHENYLETHERFLUORENE4-NITROANILINE4.6-DINITRO-2-METHYLPHENOLN-NITROSOOIPHENYLAMINE4-BROMOPHENYL-PHENYLETHERHEXACHLOROBENZENEPENTALCHLOROPHENOLPHENANTHRENEANTHRACENECARBAZOLEDI-N-BUTYLPHTHALATEFLUORANTHENEPYRENEBUTYLBENZYLPHTHALATE3,3'-DICHLOROBENZIDINEBENZO (A) ANTHRACENECHRYSENEBIS (2-ETHYLHEXYL) PHTHALATEDI-N-OCTYLPHTHALATEBENZO(B)FLUORANTHENEBENZO(K) FLUORANTHENEBENZO (A) PYRENEINOENO (1,2,3-CD) PYRENEDIBENZO (A,H) ANTHRACENEBENZO (G,H,I) PERYLENE

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V & M ALBALABEJO NORTEInorganic AnalytesRound 2 SampI ing

08/07/19983:14 PMPage 1




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08/07/19983:14 PMPage 2

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UNITED STATES ENVIRONMENTAL PROTECTION AGENCYREGION II

EDISON. NEW JERSEY O8837

0 7 JUL 1998

Mr. Scott KirchnerCDM-FPC107-F Corporate Blvd.South Plainfield, NJ 07080

Dear Mr. Kirchner:

Enclosed are the results of the V&M (Farms) Albadejo sampling survey conducted by your firmduring the week of May 18. 1998. These data include the results of eight water samples forvarious water quality analyses. Any correspondence concerning these results should refer to ourinternal project number, 801. to uniquely identify it. Please refer to the first page of the reportfor a description of any remark codes used as data qualifiers. It should be noted that all data areconsidered to be EPA- validated.

If you have any questions you can contact me by phone at (732) 906-6886. by fax at (732) 321-6613 or via the Internet at "[email protected]".

Sincerely.

lohn Bim'Special Projects CoordinatorLaboratory Branch

cc: Caroline Kwan-Appelman (ERRD) w/'enc.

Enclosure

3001047

IAB D A T A MANAGEMENI S Y S T E M - REGION IICOMPLETED PROJECT APPROVAL I REPORT D A T E 9B/07/02

(PROJECT NUMBER PROJECT DATE PROJECT NAME

BOl 98/05/18 V&N AlBADtJO A /* APPROVED

toooHotfc.00

PROJECT MO: 801

REMARK CODE

8JKLH0IU

CODE

QDQEOFQJOGOSORQPQH01QHOBOQ

COMPLEIEO ANALYSIS REPORT x

PROJECT NAME: ViM ALBADEJO

EXPLANATIONS Of REMARK COOES

EXPLANATION

RESULTS BASED UPON COLONY COUNTS OUTSIDE ACCEPTABLE RANI.EESTIMATED VALUEACTUAL VALUE KNOWN TO BE LESS THAN VALUE GIVENACTUAL VALUE KNOWN TO BE GREATER THAN VALUE GIVENNO OBSERVABLE EffECT CONCENTRATION < 0.3%SAMPLED BUT NOT ANALYZED DUE TO LAB ACCIDENTREPORTED VALUE LESS THAN C R I T E R I A Of DETECTIONREPORTING LIMII

PAGE t


QA/QC REMARK CODES

EXPLANAIION

ACCURACY CHECK SAMPLE ABOVE UPPER ACCEPTANCE L I M I TACCURACY CHECK SAMPLE BELOW LOWER ACCEPTANCE L I M I TPRECISION Of CALIBRATION CURVE LESS THAN ACCEPTANCE CRITE R I AESTIMATED DETECTION L I M I T DUE TO INTERFERENCECONTINUING CALIBRATION CHECK DOES NOT MEET ACCEPTANCE C R I T E R I ASPIKE RECOVERIES ABOVE UPPER ACCEPTANCE L I M I TSPIKE RECOVERIES BELOW LOWER ACCEPTANCE L I M I TSAMPLE REPLICATE PRECISION DOES NOT MEET ACCEPTANCE CRITERIARECOMMENDED HOLDING TIMES EXCEEDEDTENTATIVELY IDENTIFIED COMPOUNDPRESENCE OF MATERIAL VERIFIED BUT NOT QUANTIFIEDBLANK CONTAMINATED BY ANALYTE IN EXCESS OF ACCEPTANCE CRITERIASAMPLE IMPROPERLY PRESERVED

LOCATION COOES FOR IDENTIFICATION OF SAMPLING POINTS AT INDUSTRIAL /SANITARY FACILITIES, LANDFILLS, HAZARDOUS WASTE SITES.

U)ooHO

CODE NUMBERS

1001 - 10501051 -' 1099

1100143515XX200030003100320033003400350036003700

1249K54

30993199329933993499359936993799

SAMPLING POINTS

EFFLUENT PIPE NUMBER 001 TO 050OTHER EFFLUENTS SUCH AS COOLING TOWER DISCHARGE,DISCHARGE FROM HOLDING PONDS, ETC...IN PLANT SAMPLESSEPARATE INFLUENT POINTS/WATER SOURCESINFLUENT ASSOCIATED WITH EFFLUENT 10XXBLANK FOR VOLATILE ORGANICSGROUND WATER FROM WELL 01 TO °9SEDIMENT SAMPLE (WATER BOTTOM)SOIL SAMPLESTREAM WATER SAMPLELAGOON SAMPLESTORAGE TANK SAMPItLEACHATE SAMPLEOTHER TYPE SAMPLE

vo

1'Kil.lfl I NO: 801

COMPLEIED ANAI YSIS REPORI

PROJECT NAME: VSM AtBADEJO

PAGE 2

REI-ORT DATE: 98/07/02

DATE T I M ESIAIION NO FROM OF

TO DAYLABNO PARNO PARAMETER NAME

VA1UE & QA/QCUNIIS CHEMISIRY REMARK REMARK

HU 6 98/05/18 1200DEPTH: 0000 SUBSTRATE: AQUEOUS.DESCRIPTION: MU-6

MW-4 9U/05/18 1500DEPTH: 0000 SUBSTRATE: AQUEOUSDESCRIPTION: MU-4

MW-5 98/05/19 0930DEPTH: 0000 SUBSTRATE: AQUEOUSDESCRIPTION: MU-5

IW 3 98/05/19 1130JEPTH: 0000 SUBSTRATE: AQUEOUS1ESCRIPTION: MU-3

205403 70301 TOTAL DISSOLVED SOLIDS MG/L TOTAL00530 RESIDUE, NONFILTERABLE MG/L00940 CHLORIDE MG/L00425 ALKALINITY, BICARBONATE MG/L00430 A L K A L I N I T Y , CARBONATE MG/L00630 NITROGEN, N I T R A T E « N I T R I T E MG/L00945 SUlFATE MG/L

205404 70301 TOTAL DISSOLVED SOLIDS MG/L TOTAL00530 RESIDUE, NONFILTERABLE MG/L00940 CHLORIDE MG/L00425 ALKALINITr, BICARBONATE MG/L00430 ALKALINITY, CARBONATE MG/L00630 NITROGEN, NITRATE + N I T R I T E MG/L00945 SULFATE MG/L

205406 70301 IOTAL DISSOLVED SOLIDS MG/L TOTAL00530 RESIDUE, NONFILTERABLE MG/L00940 CHLORIDE MG/L00425 A L K A L I N I T Y , BICARBONATE MG/L00430 A L K A L I N I T Y , CARBONATE MG/L00630 NITROGEN, NITRATE + NITRITE MG/L00945 SULFATE MG/L

205407 70301 TOTAL DISSOLVED SOLIDS MG/L TOTAL00530 RESIDUE, NONFILTERABLE MG/L00940 CHLORIDE MG/L00425 A l K A L I H I T Y , BICARBONATE MG/L00430 A I K A L I N I T Y , CARBONATE MG/L

30813

21.62314 U

1.012.0

2897

15.6230

4 U1.57.2

3674 U

22.92624 U

0.1 U29.7

3164 U

21.22504 U

U)OoI-1oUlo

PROJECT NO: 801

COMPLEIED ANALYSIS REPORT (

PROJECT NAME: VnM ALBADEJO

PAUE 3


SIA1ION NODAIEFROMTO

I I MEOF

OAYLABNO PARNO PARAMETER NAME

VALUE & OA/OCUNIIS CHEMISTRY' REMARK REMARK

.MU 7 98/05/19 1500DEPTH: 0000 SUBSTRAIE: AQUEOUSDESCRIPTION: MU-7

MU 2 98/05/20 1015DEPTH: 0000 SUBSIRAIE: AQUEOUSDESCRIPTION: MU 2

MW 1 98/05/20 1335DEPTH: 0000 SUBSTRATE: AQUEOUSDESCRIPTION: MU-1

205407 00630 NITROGEN, N I T R A T E » N I T R I T E MG/L00945 SULFAIE MG/L

205408 70301 IOTAL DISSOLVED SOLIDS MG/L IOIAL00530 RESIDUE, NONFILTERABLE MG/L00940 CHLORIDE MG/L00425 A L K A L I N I T Y , BICARBONATE MG/L00430 ALKALINITY, CARBONATE MG/l00630 NITROGEN, NITRATE » N I T R I T E MG/L00945 SULFATE MG/L

205409 70301 IOTAL DISSOLVED SOLIDS MG/L I01AI00530 RESIDUE, NONFILTERABLE MG/L00940 CHLORIDE MG/L00425 AL K A L I N I T Y , BICARBONATE MG/L00430 ALKALINITY, CARBONATE MG/L00630 NITROGEN, NITRATE » N I T R I T E MG/L00945 SULFATE MG/L

205410 70301 TOTAL DISSOLVED SOLIDS MG/L TOTAL00530 RESIDUE, NONFILTERABLE MG/L00940 CHLORIDE MG/L00425 A L K A L I N I T Y , BICARBONATE MG/L00430 ALKAL INITY, CARBONATE MG/t00630 NITROGEN, NITRATE + N I T R I T E MG/L00945 SULFATE MG/L

1.17.2

3194 U

21.32514 U

1.17.1

3494 U

31.02464 U

0.1 U35.6

3214 U

12.02774 U

0.1 U15.2

00ooHOcnH

PRO.lECI NO: 80)

SIAI I i i M NODAIE TIMEFROM OF10 DAY

COMPLETED ANALYSIS REPORI V

PROJECT NAME: VSH AlBADE JO

IABNO PARHO PARAMLlfR NAME

PAGE I,


VAUIE S QA/QCUNIIS CHEMISIRY REMARK REMARK

SPRING I 98/Ob/21 0930DEPIH: 0000 SUBSTRATE: AQUEOUSDESCRIP I I ON: SPRING 1

205412 70JOI TOTAL DISSOLVED SOI IDS MG/L00530 RESIDUE, NONFIL1ERABLE HG/L00940 CHLORIDE HG/L00425 ALKALINITY. BICARBONATE MG/L00430 ALKALINITY, CARBONATE MG/L00630 NITROGEN, N I T R A T E • N I T R I T E MG/L00945 SULFATE MG/L

IOIAI 2844 U

18.81784 U

1.019.3

END OF PROJECT "**"'

OoHOUlto


3001053


Round 3 Sampling

01/28/19993:24 PMPage 1

SAMPLE NAMESAMPLE DATETEXT 001TEXT 003

CHLOROMETHANEBROMOMETHANEVINYL CHLORIDECHLOROETHANEMETHYLENE CHLORIDEACETONECARBON BISULFIDE1,1-DICHLOROETHENE1,1-DICHLOROETHANEcis-1,2-Dichloroethene1 ,2-TRANS-DICHLOROETHYLENECHLOROFORM1,2-DICHLOROETHANE2-BUTANONEBromochloromethane1,1,1-TRICHLOROETHANECARBON TETRACHLORIDEBROMOO I CHLOROMETHANE1,2-DICHLOROPROPANEcis 1,3-DICHLOROPROPENETRICHLOROETHYLENED I BROMOCHLOROMETHANE1,1,2-TRICHLOROETHANEBENZENETrans 1,3-DICHLOROPROPENEBROMOFORM4-METHYL-2-PENTANONE2-HEXANONETETRACHLOROETHYLENE1 , 1 ,2,2-TETRACHLOROETHANE1 ,2-DibromoethaneTOLUENECHLOROBENZENEETHYLBENZNESTYRENEXYLENES (TOTAL)1,3-DICHLOROBENZENE1,4-DICHLOROBENZENE1,2-DICHLOROBENZENE1 ,2-Dibromo-3-chloropropane1,2,4-TRICHLOROBENZENE


FB-09/09/98-A FB-09/09/98-B FB-09/09/98-C MU-1-R3 MW-2-R309/09/98 09/09/98 09/09/98 09/10/98 09/10/98

Blank Rinsate (pump) Rinsate (bailer) Groundwater GroundwaterTAL only TAL only BSR08 TAL only TAL only

1.00 U1.00 U1.00 U1.00 U0.70 JR2.001.00 U1.00 U1.00 U1.00 U40.00 D

1.00 UR1.00 U1.00 U1.00 U4.001.00 U1.00 U1.00 U0.50 J1.00 U1.00 U1.00 U1.00 U5.00 U5.00 U1.00 U1.00 u1.00 U1.00 U1.00 U1.00 u1.00 u1.00 u1.00 U1.00 u1.00 u1.00 u1.00 U

MW-3-R309/10/98

GroundwaterTAL only

OUl


Round 3 Sampling

01/28/19993:24 PMPage 2


CHLOROMETHANEBROMOMETHANEVINYL CHLORIDECHLOROETHANEMETHYLENE CHLORIDEACETONECARBON DISULFIDE1,1-DICHLOROETHENE1,1-DICHLOROETHANEcis-1,2-Dichloroethene1, 2-TRANS-DICHLOROETHYLENECHLOROFORM1,2-DICHLOROETHANE2-BUTANONEBromoch 1 oromethane1,1,1-TR I CHLOROETHANECARBON TETRACHLORIDEBROMOD I CHLOROMETHANE1,2-DICHLOROPROPANEcis 1,3-DICHLOROPROPENETR I CHLOROETHYLENED I BROMOCHLOROMETHANE1,1,2-TRICHLOROETHANEBENZENETrans 1,3-DICHLOROPROPENEBROMOFORM4-METHYL-2-PENTANONE2-HEXANONETETRACHLOROETHYLENE1 , 1 , 2, 2- TETRACHLOROETHANE1,2-DibromoethaneTOLUENECHLOROBENZENEETHYLBENZNESTYRENEXYLENES (TOTAL)1,3-DICHLOROBENZENE1,4-DICHLOROBENZENE1,2-DICHLOROBENZENE1 , 2 - D i bromo - 3 - ch I oropropane1,2,4-TRICHLOROBENZENE


MW-4-R3 MW-5-R3 MW-6-R309/09/98 09/10/98 09/09/98

Groundwater Groundwater GroundwaterTAL only TAL only BSR11

1.00 U1.00 U1.00 U1.00 U2.00 UR2.00 U1.00 U1.00 U1.00 U1.00 U1.00 U1.00 UR1.00 U1.00 U1.00 U1.00 U1.00 U1.00 U1.00 U1.00 U1.00 U1.00 U1.00 U1.00 U5.00 U5.00 U1.00 U1.00 U1.00 U1.00 U1.00 U1.00 U1.00 u1.00 u1.00 u1.00 U1.00 U1.00 U1.00 u

MU-7-R309/09/98

Dup of MW-6-R4BSR12

1.00 U1.00 U1.00 U1.00 U2.00 U16.00 J1.00 U1.00 U1.00 U1.00 U1.00 U1.00 U1.00 UR1.00 U1.00 u1.00 u1.00 U1.00 U1.00 U1.00 U1.00 U1.00 U1.00 U1.00 Ui.oo u5.00 U5.00 U1.00 u1.00 u1.00 U1.00 U1.00 u1.00 U1.00 U1.00 u1.00 u1.00 U1.00 U1.00 U1.00 u

TB-09/09/98-R309/09/98

Trip BlankBSR07

1.00 U1.00 U1.00 U1.00 U1.00 JR1.00 U1.00 U1.00 Ui.oo u1.00 u56.00 D1.00 UR1.00 u1.00 u1.00 u6.001.00 U1.00 U1.00 U0.60 J1.00 U1.00 U1.00 U1.00 U5.00 U5.00 U4.001.00 u1.00 U1.00 U1.00 U1.00 u1.00 u1.00 u1.00 U1.00 U1.00 U1.00 u1.00 U


01/28/19993:24 PMPage 1

U>OOHOUlO\




FB-09/09/98-A09/09/98

BlankMBQR46

23.40 U31.20 U0.90 U1.20 U0.60 U3.50 U64.50 B6.40 U*J5.90 U2.00 U17.40 U2.10 BJ45.40 U2.50 U0.10 U

31.50 U611.00 U0.50 UR

125.00 B0.60 U3.30 U1.80 BNA

FB-09/09/98-B09/09/98

Rinsate (pump)MBQR47

23.40 U31.20 U0.90 U1.20 U0.60 UR52.10 B6.40 U*J5.90 U7.70 B17.40 U3.30 J45.40 U2.50 U0.10 U

31.50 U611.00 U0.50 UR

174.00 B0.60 U3.30 U11.40 BNA

FB- 09/09/98- C09/09/98

Rinsate (bailer)MBQR48

23.40 U31.20 U0.90 U1.20 U0.60 U3.50 U19.80 B6.40 U*J5.90 U2.00 U17.40 U2.10 BJ45.40 U2.50 U0.10 U

31.50 U611.00 U0.50 UR

122.00 U0.60 U3.30 U4.90 BNA

MU-1-R309/10/98

GroundwaterMBQR53

1,010.0031.20 U0.90 U43.60 B0.60 U3.50 U

89,300.006.40 U*J5.90 U18.20 B

1,580.004.20 J

31,100.0048.400.10 U

31.50 U2,910.00 B

0.50 UWJR

15,300.000.60 U3.30 U

490.00 JNA

MW-2-R309/10/98

GroundwaterMBQR54

2,250.0031.20 U3.80 B79.30 B0.60 U3.50 U

94,300.00R5.90 U7.20 B

2,470.003.00 J

31,700.0076.100.10 U

31.50 U2,890.00 B

0.50 UUJR

30,500.000.60 U8.70 B

107.00 JNA

MW-3-R309/10/98

GroundwaterMBQR55

147.00 B31.20 U0.90 UU30.10 B0.60 U3.50 U

92,200.00121.00 *J5.90 U6.20 B

1,560.005.00 J

8,270.00111.000.10 U82.70

11,000.000.50 UUJR

14,500.000.60 U7.20 B

225.00 JNA


01/28/19993:24 PMPage 2

U>OoHOUl



ug/lug/lug/tug/lug/lug/lug/lug/lug/lug/lug/lug/lug/lug/lug/lug/lug/lug/lug/lug/lug/lug/lug/lug/l

MW-4-R309/09/98

GroundwaterMBQR49

23.40 U31.20 U0.90 U22.10 B0.60 U3.50 U

71,900.006.40 U*J5.90 U2.00 U17.40 UR

14,100.002.50 U0.10 U31.50 U

1,780.00 B0.50 UUR

10,400.000.60 U3.30 U4.20 BNA

MU-5-R309/10/98

GroundwaterMBQR52

23.50 B31.20 U3.00 B51.00 B0.60 U3.50 U

64,800.006.40 U*J5.90 U2.00 U

256.002.20 BJ

27,000.007.80 B0.10 U31.50 U

2,050.00 B0.50 UWJR

24,400.000.60 U3.30 U29.80 JNA

MW-6-R309/09/98

GroundwaterMBQR50

1,130.0040.00 BJ0.90 UW35.60 B0.60 U3.50 U

122,000.00R5.90 U10.10 B

1,730.004.70 J

12,700.0041.90 J0.10 U31.50 U

5,350.000.50 UWJ3.70 UJ

14,100.000.60 U6.20 B59.80 JNA

MU-7-R309/09/98

Dup of MU-6-R4MBOR51

1,120.0031.20 U1.20 B33.80 B0.60 U3.50 U

121,000.00R5.90 U6.20 B

1,620.005.10 J

12,600.0041.200.10 U31.50 U

5,310.000.50 UUJR

13,900.000.60 U6.30 B65.30 JNA

TB-09/09/98-R309/09/98

Trip BlankVOA only


3001058

u>ooHOUl

V & M ALBALABEJO NORTEDetected AnayltesRound 4 Sampling

01/28/19993:59 PM

Page 1


Inorganic AnalytesALUMINUMMf\oCM 1 L

BARIUMCALCIUMCHROMIUM\f\Jr r C K

IRONLEADMAGNESIUMMANGANESEn 1 I'NC L

POTASSIUMSELENIUMSODIUMVANADIUMZINC

ug/lug/lug/lug/lug/lug/lug/lug/lug/lug/lug/lug/lug/lug/lug/lug/l

FB-11/10/98-R411/10/98

Rinsate (bai ler)

27.20 BE*

1.50 B122.00 B8.10 B

18.30 B

8.90 B42.50 BJ

362.00 B

15.20 B

MW-1-R411/11/98

Groundwater

1,250.00 E*J6.70 B46.30 B

64,100.009.30 B8 fin n

955.003.50

29,600.0024.90

3,180.00 B2.50 B

14,700.00

71.20 J

MW-2-R411/12/98

Groundwater

14,600.00 E*J

109.00 B123,000.00

35.6012.40 B

6,890.002.70 B

34,400.00130.0042.40 BJ

5,140.00 B3.70 B

35,900.0035.20 B154.00 J

MW-3-R411/12/98

Groundwater

693.00 E*J

21.90 B95,100.00

6.90 B

458.002.60 B

7,890.0026.80

3,170.00 B2.40 BJ

10,700.00

94.40 J

MW-4-R411/11/98

Groundwater

809.00 E*J1.50 B24.90 B

87,200.006.90 B

706.004.90

14,400.0019.0042.50 B

1,950.00 B3.50 B

10,100.005.40 B90.40 J

MU-5-R411/10/98

Groundwater

200.00 BE*

53.30 B66,200.00

152.001.30 B

27,800.007.10 B42.50 BJ

2,970.00 B

22,900.00

114.00 J

V & M ALBALABEJO NORTEDetected AnayltesRound A SampI ing

01/28/19993:59 PMPage 2


Inorganic AnalytesALUMINUMARSENICBARIUMCALCIUMCHROMIUMCOPPERIRONLEADMAGNESIUMMANGANESEu I rkTin 1 L.NC L

POTASSIUMSELENIUMSODIUMVANADIUMZINC

ug/lug/lug/lug/lug/lug/lug/lug/lug/lug/lug/lug/lug/lug/lug/lug/l

MU-6-R411/10/98

Groundwater

1,850.00 E*J1.90 B18.80 B

47,700.0013.909.10 B

1,030.006.90

5,610.0014.90 B

8,500.00 J2.50 BJ

8,830.00

150.00 J

MW-7-R411/10/98

Groundwater

1,650.00 E*J-----19.70 B

57,200.006.90 B4.50 B

889.005.70

7,140.0013.70 B

6,450.00-----

9,620.00

141.00 J

U)ooHO

FINAL REMEDIAL INVESTIGATION REPORT V & M/ALBALADEJO …

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