AECOM 8000 Virginia Manor Road Suite 110 301.289.3901 fax ......Apr 04, 2019 · • Per MDE’s...

AECOM 301.289.3900 tel 8000 Virginia Manor Road Suite 110 301.289.3901 fax Beltsville, Maryland 20705

#32785 Hampstead, Maryland – First Quarter 2019 April 2019

April 4, 2019

Mr. Matt Mueller AECOM Project #: 60338398 Maryland Department of Environment Oil Control Program 1800 Washington Blvd. Suite 620 Baltimore, Maryland 21230-1719 Subject: First Quarter 2019 – Quarterly Monitoring Report Compliance Reporting Date: April 31, 2019

7-Eleven Store No. 32785 125 Hanover Pike Hampstead, MD Facility ID No. 11266 Case No. 2006-0282-CL Dear Mr. Mueller,

On behalf of 7-Eleven, Inc. (7-Eleven), AECOM Technical Services, Inc. (AECOM) has prepared the attached quarterly monitoring report for the above-referenced site. This report was prepared to meet the requirements set forth in the Consent Order between 7-Eleven and the Maryland Department of the Environment (MDE) dated March 21, 2011.

All ten on-site monitoring wells and the on-site potable well were sampled this period on March 7, 2019. This monitoring period the monitoring wells were gauged and sampled quarterly; the tank field wells were sampled quarterly when sufficient water was present; and the on-site potable well was sampled quarterly. This site is located within the “High Risk Groundwater Use Area”; however, to be more conservative, the sampling exceeds the frequency requirements set forth in MDE’s Emergency Oil Pollution and Tank Management Regulations for sites located in a “High Risk Groundwater Use Area”, effective January 26, 2005.

As directed by MDE, AECOM installed a point-of-entry treatment (POET) system on the 124 Hanover Pike potable well on May 27, 2010; AECOM samples the system every other month. No volatile organic compounds (VOCs), including methyl-tert-butyl ether (MTBE), have been detected above laboratory detection limits in the final effluent. Six carbon changes had been conducted prior to this quarter, the most recent of which was conducted on December 28, 2012.

Per MDE’s Approval of Rebound Assessment Request directive letter dated July 31, 2018, the remediation system was shut down on August 31, 2018. While the remediation system was in operation, AECOM was conducting quarterly sampling of the monitoring and tank field wells. Per MDE’s July 31, 2018 directive letter, sampling of the monitoring wells was conducted on a monthly basis for the first three months following system shutdown (September, October, and November 2018), and quarterly thereafter (beginning December 2018). Sampling frequency of the on-site potable well was increased from annually to quarterly, and sampling of the off-site potable well at 124 Hanover Pike was increased from every other month to monthly for three months (September, October, and November 2018), and every other month thereafter (beginning January 2019).

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If you have any questions, please contact the undersigned at (301) 289-3900.

Yours sincerely,

Matt Emery Rachael Allen Environmental Scientist Project Manager [email protected] [email protected]

Marie Treiber Regional Senior Project Manager [email protected]

Attachments:

Figure 1 – Groundwater Elevation Map – Shallow Wells, March 7, 2018 Figure 2 – Groundwater Elevation Map – Deep Wells, March 7, 2018 Figure 3 – Dissolved-Phase Hydrocarbon Concentration Map, March 7, 2018 Table 1 – Depth to Water and Groundwater Elevation of Monitoring Wells Table 2 – Groundwater Analytical Results of Monitoring Well Sampling Table 3 – 124 Hanover Pike Sampling Results Table 4 – Residential Potable Well Sampling Results Table 5 – Pumping Wells Groundwater Analytical Results Table 6 – Groundwater Remediation System Performance Data Table 7 – Summary of Treatment System Analytical Results Attachment A - Laboratory Analytical Reports – Monitoring Wells, On-site Potable Well, and Residential Treatment Potable Well Attachment B – MTBE Concentration Graphs Over Time Attachment C – Residential Treatment System Influent MTBE Concentrations Over Time Attachment D – Groundwater Drawdown Graphs (Pumping Wells) Attachment E – Air Stripper Influent MTBE and TPH-GRO Concentration Graphs Over Time

cc: 7-Eleven Project File

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QUARTERLY MONITORING REPORT- FIRST QUARTER 2019 7-ELEVEN STORE NO. 32785

125 Hanover Pike Hampstead, MD

Facility ID No. 11266 Case No. 2006-0282-CL

AECOM Project 60338398

Compliance Reporting Date – April 31, 2019

AECOM Contacts: Rachael Allen, Project Manager Marie Treiber, Regional Senior Project Manager

7-Eleven, Inc. Contact: Jose Rios, Manager, Environmental Services

CURRENT SITE STATUS

• The site is an active 7-Eleven convenience store and retail gasoline facility.

• Currently, ten monitoring wells, two tank field wells, and four shallow injection wells are located onthe site. Per MDE’s July 31, 2018 directive letter, sampling of the monitoring wells was conductedon a monthly basis for the first three months following system shutdown (September, October, andNovember 2018), and quarterly thereafter (beginning December 2018). Sampling frequency of theon-site potable well was increased from annually to quarterly.

• Per MDE’s July 31, 2018 directive letter, the off-site potable well at 124 Hanover Pike wasincreased from every other month to monthly for three months (September, October, and November2018), and every other month thereafter (beginning January 2019).

• Per the MDE-approved Corrective Action Plan (CAP) with revisions, the groundwater extraction andtreatment system began operations in October 2013. AECOM deactivated the remediation systemon August 31, 2018 to begin another controlled rebound assessment according to the ReboundAssessment Monitoring Plan submitted and approved by MDE.

PAST ACTIVITIES

• Two USTs (RUL #1 and PUL #2) and associated UST system were installed at the site in March2000.

• On July 7, 8 and 11, 2005, AECOM installed three monitoring wells (MW-1 through MW-3) at thesite to meet the requirements set forth in MDE’s Emergency Oil Pollution and Tank ManagementRegulations, effective January 26, 2005. COMAR 26.10.02.03-4 requires installation of a minimumof three monitoring wells outside of the UST tank field for release detection and determination ofgroundwater flow direction at the site.

• On September 15, 2005, AECOM submitted a Monitoring Well Installation and Observation Report

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to MDE. AECOM (Legacy ENSR) on behalf of 7-Eleven recommended the installation of two additional monitoring wells at the site based on the presence of elevated concentrations of methyl-tert-butyl ether (MTBE) in monitoring wells MW-1 and MW-3.

• On October 5, 2005, MDE issued a directive letter approving installation of two additional monitoringwells at the site. MDE requested a self-audit of the underground storage tank (UST) system. MDEalso required completion of a receptor survey, including review of all well completion records withina ½-mile radius of the site. On November 18, 2005, 7-Eleven submitted to MDE the results of anUST system self audit conducted October 26, 2005.

• On November 21 and 22, 2005, AECOM installed two additional monitoring wells (MW-4 and MW-5)at the site.

• On January 26, 2006, AECOM submitted the results of the receptor survey to MDE.

• On August 25, 2006, MDE issued a directive letter requesting a Supplemental Work Plan, detailinga plan to define the extent of petroleum hydrocarbons in the soil and groundwater and to determineif there was any off-site migration of either liquid or dissolved-phase hydrocarbons. Further, theletter requested submittal of an Interim Corrective Action Plan (CAP), evaluating subsurface vaporsin the vicinity of the active UST field, and determining the most efficient and effective means ofreducing the vapors should they be present in the vicinity of the active UST field and on-sitemonitoring well MW-1.

• On October 13, 2006, AECOM submitted the Supplemental Work Plan and Interim CAP requestedin MDE’s August 25, 2006 directive letter. The Interim CAP included a discussion of potentialremediation and mitigation of contamination at the site through soil vapor extraction (SVE), asrequested by MDE, while the Supplemental Work Plan entailed the use of geoprobe direct pushtechnology to install borings and collect soil and groundwater samples.

• On January 22, 2007, MDE issued an approval letter, indicating that they were in agreement withthe proposed plans. Further, MDE requested several additional items, including an increase infrequency of groundwater sampling from a semi-annual schedule to a quarterly schedule for the on-site monitoring wells and tank field wells, with the on-site potable well to remain on the current semi-annual sampling schedule. All monitoring well and tank field well samples were to continue to beanalyzed for full-suite volatile organic compounds (VOCs) via EPA Method 8260B (also includingfuel oxygenates) and total petroleum hydrocarbons via EPA method 8015B (diesel and gasolinerange organics). The potable samples were to continue to be analyzed for full-suite VOCs via EPAMethod 524.2 (including fuel oxygenates).

• On February 20, 2007, AECOM submitted a request for modification to and/or postponement ofMDE’s increased scope requirements in light of the January 2007 sampling results, historicalanalytical data and the groundwater flow direction on site. Since sampling was initiated in July2005, MTBE concentrations in the up-gradient well MW-1 steadily decreased from 31,000 ug/l tobelow laboratory detection limits in the January 2007 sampling event. Additionally, MTBEconcentrations in all sampled wells were below the MDE guideline of 20 μg/l during the January2007 event. AECOM proposed that current site monitoring be increased to quarterly (with theexception of the on-site potable well which would remain semi-annual), as recommended by MDE intheir January 22, 2007 letter, and recommended delayed completion of a Site Investigation WorkPlan and a Site Conceptual Model.

• On April 26, 2007, MDE issued a directive letter, temporarily delaying completion of a SiteInvestigation Work Plan and a Site Conceptual Model pending the results of the Interim CAP.

• On July 17, 2007, six off-site private supply wells were sampled at the request of MDE. The sixprivate supply wells were located in the immediate area of the 7-Eleven facility, including 114, 118,

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123, 124, 130 and 135 Hanover Pike. MTBE was detected at concentrations of 0.6 micrograms-per-liter (µg/l), 2.9 µg/l, 44 µg/l and 0.6 µg/l at 114, 118, 124 and 135 Hanover Pike. MTBE was below laboratory detection limits at 123 and 130 Hanover Pike. All other VOCs, including benzene, toluene, ethylbenzene and xylene (BTEX), were non-detect (ND) in each of the private supply wells sampled.

• On July 30, 2007 a confirmation sample was collected from 124 Hanover Pike, per MDE directive.The analytical results indicated an MTBE concentration of 150 µg/l.

• On July 22, 2008, MDE issued a directive for a Corrective Action Plan (CAP). Based ondiscussions with the MDE the CAP was to be prepared after additional monitoring wells wereinstalled and feasibility testing could be completed.

• A Delineation Work Plan for the installation of three additional monitoring wells was submitted to theMDE on August 15, 2008 and was approved October 7, 2008.

• On November 17-19, 2008, three monitoring wells (one shallow and two deep wells) were installed.

• On December 1 and 2, 2008, geophysical testing was performed on the two deep wells. Thissurvey was conducted in order to better define the fracture orientation, evaluate water-bearingzones and evaluate remedial strategies.

• On March 23, 2009, AECOM reviewed MDE files related to the former Crown Station 142 (Case#2003-0376 CL) located at 201 Hanover Pike. Geologic and sampling data were reviewed forpossible relationships to the project site.

• On March 27, 2009, AECOM submitted an Enhanced Bio-Augmentation Pilot Test Work Plan toMDE, including installation of four 2-inch injection wells, Inj-1 to Inj-4, in the vicinity of monitoringwell MW-6.

• On August 7, 2009, MDE approved the Enhanced Bio-Augmentation Pilot Test Work Plan andrequested sampling of 124 and 130 Hanover Pike potable wells (pre-, mid-, and post-monitoringperiod).

• On September 28 and 29, 2009, four 2” diameter injection wells (INJ-1 through INJ-4) were installedand developed in the area of MW-6, as proposed in the Enhanced Bio-Augmentation Pilot TestWork Plan.

• On October 22, 2009, conduits connecting the wells and to a future storage tank were installed, andthe wells were completed with manholes. These wells and the piping system will be used todetermine the feasibility of subsurface injection of bio-remediation products.

• On April 1, 2010, AECOM began bio-remediation injections as part of the Enhanced Bio-Augmentation Pilot Test; results are summarized in Bio-Augmentation Reports under separatecover.

• On May 27, 2010, per MDE, AECOM installed a carbon treatment system on the potable welllocated at 124 Hanover Pike.

• On June 1 through 3, 2010, AECOM installed two deep monitoring wells (MW-9 and MW-10). Thewells were installed as part of the preparation of the Corrective Action Plan to help delineate thebedrock aquifer.

• On January 4, 2011, per discussions with MDE, AECOM installed an ISOC in well INJ-3, one of thetwo injection wells (INJ-2 and INJ-3), to enhance the bioremediation activity at the site. An ISOC

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could not be placed into well INJ-2 due to frozen lines. In December 2010 through February 2011, bio-remediation injections were postponed due to freezing conditions.

• On March 21, 2011, MDE issued an Administrative Consent Order to 7-Eleven, detailing theregulatory-mandated activities and reporting schedules for the site.

• As directed by MDE in their June 7, 2011 correspondence, samples collected from the treatmentsystem located at 124 Hanover Pike will be sampled for Nitrate and Nitrite via EPA method 353.3and Orthophosphate via EPA method 365.2 in alternating months. Further, well MW-9 will beadded to the monthly gauging and DO monitoring schedule effective immediately.

• On March 5, 2012, AECOM prepared and submitted a work plan to conduct a 48-hour continuouspump test from either monitoring well MW-8 or MW-9. It was approved by MDE on May 9, 2012.The approval letter indicated that no later than August 1, 2012, a comprehensive report explainingthe results of the pumping test activities must be submitted, which also needed to include a revisedschedule for the submittal/implementation of a CAP.

• On March 27, 2012, AECOM submitted a Notice of Intent (NOI) request for authorization todischarge treated groundwater under a general discharge permit, MDE approved this request onMay 8, 2012.

• On May 14, 2012, AECOM, on behalf of 7-Eleven, submitted an application to the MD-SHA District7 Office for a District Office (DO) permit to discharge groundwater treated on site into a stormwaterretention pond located adjacent to the property. This request was approved in a directive letterdated August 9, 2012.

• On August 1, 2012, AECOM submitted a request for an extension of the submittal date for thePumping Test Summary Report to September 3, 2012, which was subsequently approved by JimRichmond of MD-SHA.

• As approved by MDE, the Maryland State Highway Administration (MD-SHA) District 7 Office, andas permitted by the District Office (DC), a 48-hour continuous pump test from monitoring well MW-10 was performed on October 26, 2012.

• On December 21, 2012, a Corrective Action Plan including the pump test results was submitted toMDE.

• MDE approved the CAP in a letter dated February 20, 2013. AECOM was required to submit acontingency plan (within 45 days of the CAP Approval letter) which will outline the procedures underwhich operation of the groundwater remediation system will continue, in the event that siteconditions change, which may require alternative methods of wastewater disposal.

• On May 1, 2013, AECOM submitted the contingency plan for approval.

• On October 8, 2013, AECOM performed the startup and shakedown of the groundwater remediationsystem.

• On May 6, 2014, SCE, under the oversight of AECOM, performed warranty repairs on the fittingsassociated with the equipment installed in well MW-9.

• On August 16, 2015, as approved by the MDE in the directive letter dated August 26, 2015, AECOMdeactivated the groundwater remediation system to complete a controlled rebound assessment toevaluate the non-pumping petroleum contaminate concentrations.

• On October 7, 2015, AECOM reactivated the groundwater remediation system based on the

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September 23, 2015 groundwater sampling results.

• On February 4, 2016 AECOM began pulsing the recovery wells; deactivating pumps in wells MW-8and MW-9 for two week periods to complete a rebound assessment in wells MW-8, MW-9, and MW-10.

• On September 28, 2016, AECOM submitted a letter to MDE requesting to deactivate thegroundwater remediation system to perform a rebound assessment.

• On December 8, 2016, as approved by the MDE in the directive letter dated November 28, 2016,AECOM deactivated the groundwater remediation system to complete a controlled reboundassessment to evaluate the non-pumping petroleum contaminate concentrations. The system wasreactivated on December 16, 2016 due to freezing temperatures. On December 23, 2016 thesystem was deactivated and drained to prevent freezing.

• On December 29, 2016, AECOM reactivated the groundwater remediation system based on theDecember 16, 2016 groundwater sampling results.

• On August 1, 2017, as approved by the MDE in the directive letter dated August 24, 2014, AECOMdeactivated the groundwater remediation system to complete a controlled rebound assessment toevaluate the non-pumping petroleum contaminate concentrations.

• AECOM reactivated the groundwater remediation system on October 2, 2017 due to elevatedMTBE concentrations in MW-8 (329 μg/l).

• On November 21, 2017, AECOM reconfigured the pumps in monitoring wells MW-8 and MW-9 tobegin pumping when the water level reaches 32 feet (ft) in MW-8 and 30 ft. in MW-9 and to stoppumping when the water level reaches the bottom of the pumps.

• On June 6, 2018, AECOM submitted a letter to MDE requesting to deactivate the groundwaterremediation system to perform a rebound assessment.

• On July 31, 2018, MDE approved the system deactivation and rebound assessment contingentupon AECOM collecting potable drinking water samples from the nearby properties that werepreviously sampled.

• On August 2, 15, and 17, 2018, AECOM collected potable drinking water samples from the nearbyproperties.

• On August 31, 2018, AECOM deactivated the groundwater remediation system and began therebound assessment.

ACTIVITIES THIS PERIOD

Monitoring Period: January through March 2019

Site Visit(s): January 31 and March 7.

Field Activities: Activities included quarterly gauging and sampling of the monitoring and tank field wells, on-site potable well sampling, and potable system sampling at 124 Hanover Pike.

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Depth-to-Water: On March 7, 2019, depth-to-water in wells under non-pumping conditions ranged from 19.85 feet below ground surface (bgs) in well MW-1 to 22.99 feet bgs in well MW-5. In the three pumping wells (MW-8, MW-9, and MW-10), depth-to-water ranged from 21.28 feet bgs in well MW-8 to 22.39 feet bgs in well MW-10 (non-pumping conditions). Groundwater elevation maps are shown as Figure 1 (shallow) and Figure 2 (deep) and historical groundwater elevations are listed in Table 1. Bedrock and shallow groundwater flow was to the southeast during this monitoring period, consistent with historical data.

Liquid-Phase Hydrocarbons: No liquid petroleum hydrocarbon (LPH) has been observed at the site.

Number of Wells/ Wells Sampled: The ten on-site monitoring wells were sampled during this period on

March 7, 2019. The two tank field wells could not be sampled because they were either dry or lacked sufficient water for sampling (Table 2, Figure 2 and Attachment A).

Samples were collected from the point-of-entry treatment (POET) system of the potable well servicing 124 Hanover Pike this period on January 31, 2019 and March 7, 2019. Historical analytical results are provided in Table 3. No residential wells without POET systems were sampled this quarter. Historical analytical results for nearby residential wells are provided in Table 4.

ANALYTICAL SUMMARY

Groundwater

Groundwater samples were collected on March 7, 2019 from the ten on-site monitoring wells. Groundwater samples from the wells were analyzed for total volatile organic compounds (VOCs), BTEX and oxygenates, including MTBE, tert-Butyl alcohol (TBA) and tert-Amyl methyl ether (TAME) by EPA Method 8260, and total petroleum hydrocarbon – gasoline range organics (TPH-GRO) via EPA Method 8015.

Analysis of groundwater samples collected from the ten monitoring wells did not reveal dissolved-phase concentrations above laboratory detection limits for benzene or BTEX.

A dissolved-phase MTBE concentration of 68.5 μg/l was reported in monitoring well MW-8 (former pumping well). This concentration was a decrease from 96.3 μg/l reported during the last quarterly period. The dissolved-phase MTBE concentration in MW-9 was 3.11 μg/l, a decrease from 40.7 μg/l during the last reporting period. Monitoring well MW-8 reported TAME concentrations of 1.30 μg/l, a slight decrease from 1.94 μg/l last reporting period. Monitoring well MW-8 reported a TPH-GRO concentration of 111 μg/l, a slight increase from the 106 μg/l last reporting period. All remaining analytes in the pumping wells reported concentrations below detection limits.

All analytes reported concentrations below detection limits in monitoring wells MW-2 and MW-10. There have been no detections in these wells since June 2016 and May 2016, respectively.

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Monitoring well MW-5 reported a MTBE concentration below the laboratory detection limit for the fifth consecutive quarter. Monitoring well MW-6 reported a MTBE concentration below the laboratory detection limit for the third consecutive quarter. The concentrations in MW-5 and MW-6 have displayed an overall decreasing trend since December 2013. All remaining analytes reported concentrations below detection limits.

No other VOCs were detected above laboratory detection limits in the monitoring wells. Summary and laboratory reports are included as Figure 3, Table 2, and Attachment A. MTBE concentration trend graphs are provided as Attachment B.

7-Eleven Potable Well

Sampling of the on-site potable well was conducted on March 7, 2019. All analytes reported concentrations below detection limits. The analytical data is summarized in Table 2 and the laboratory analytical report is included as Attachment A. As part of the post-remediation monitoring, sampling frequency for the on-site potable well has been increased to quarterly; it is scheduled to be sampled next in June 2019.

Residential Treatment Potable Well

Samples were collected from the POET system of the potable well servicing 124 Hanover Pike this quarter on January 31, 2019 and March 7, 2019. The system was sampled monthly immediately after the 7-Eleven system deactivation (September 2018 through November 2018) and every other month thereafter. Pre-, mid-, and final effluent samples are analyzed for total VOCs plus oxygenates via EPA Method 524.2. All analytes in the influent sample revealed concentrations below detection limits. Six carbon changes have been conducted to date, including change-out of all three carbon units on July 20, 2010, February 8, 2011, June 28, 2011, February 21, 2012, June 26, 2012 and December 28, 2012. Historically, no VOCs, including MTBE, have been detected above laboratory detection limits in the final effluent. Residential treatment well sampling results are included in Table 3 and Attachment A. A graph depicting influent MTBE concentrations in the potable well located at 124 Hanover Pike over time is provided as Attachment C.

REMEDIATION SYSTEM SUMMARY

AECOM began installation of the ex-situ groundwater extraction and treatment system at the site on August 19, 2013. System startup and shakedown took place on October 8, 2013 following extensive inspections and piping testing to ensure maximum efficiency and operability. Based on decreasing methyl tert-butyl ether (MTBE) trends and MDE approval, AECOM excluded monitoring well MW-6 from the system. Electric submersible pumps have been installed in monitoring wells MW-8, MW-9 and MW-10 at depths of 180 feet (ft), 185 ft, and 185 ft from the top-of-casing, respectively.

All extracted groundwater was treated through an air stripper, two particulate filters, and two 500-pound granular activated carbon (GAC) units prior to discharge. The treated groundwater was discharged to the stormwater collection system on the 7-Eleven property. The treated groundwater was discharged in accordance with the requirements of the National Pollutant Discharge Elimination System (NPDES) General Permit and all necessary permits obtained from Carroll County. The air stripper system received an exemption from the requirements of the General Permit to Construct for Soil Vapor Extraction and Groundwater Air Stripping Equipment due to the concentrations remaining well below the de minimis standards.

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In accordance with the MDE CAP Approval letter and Discharge Monitoring Reporting requirements dated February 20, 2013, AECOM sampled the remediation system effluent twice monthly and completed twice monthly operation and maintenance (O&M) site visits, including gauging of the monitoring wells, to evaluate the operation of the remediation system and to complete any necessary system maintenance.

In accordance with the MDE directive letter dated August 26, 2015, AECOM deactivated the groundwater treatment system in order to complete a controlled rebound assessment to evaluate the non-pumping petroleum contaminant concentrations. Due to the elevated concentrations of MTBE in the samples collected on September 23, 2015, AECOM reactivated the groundwater treatment system on October 7, 2015.

Based upon evaluation of the system deactivation from August 26, 2015 to September 23, 2015 and the elevated MTBE concentrations, AECOM began pulsing recovery wells MW-8 and MW-9 by deactivating the pumps for two week periods on February 4, 2016. This pulsing approach allowed for groundwater recharge and a flushing of potential petroleum compounds in the soil column above the areas that are dewatered during continuous operation of the recovery wells. Samples were collected from MW-8, MW-9 and MW-10 before and after each two week pulsing period. Groundwater analytical results for monitoring wells MW-8, MW-9 and MW-10 since the initial deactivation in August 2015 are included as Table 5 and MTBE concentration graphs since initial remediation system start-up are provided as Attachment B.

In accordance with the MDE directive letter dated November 28, 2016, AECOM deactivated the groundwater treatment system on December 8, 2016 in order to complete a controlled rebound assessment to evaluate the non-pumping petroleum contaminant concentrations. AECOM reactivated the system on December 16, 2016 due to freezing temperatures. The system was deactivated and drained to avoid freezing on December 23, 2016. Based on the December 16, 2016 sampling results, the system was reactivated on December 31, 2016. AECOM continued pulsing the recovery wells by deactivating the remediation system for three week periods and activating the remediation system for a one week period beginning on March 16, 2017.

AECOM deactivated the remediation system on August 1, 2017 to begin another controlled rebound assessment according to the Rebound Assessment Monitoring Plan submitted and approved by MDE. During this monitoring period, AECOM collected groundwater samples from the monitoring well network and the private drinking water supply well at 124 Hanover Pike on a monthly basis (August/September, 2017). AECOM on behalf of 7-Eleven submitted monthly progress reports of the results of the rebound assessment as required (August 2017). AECOM sampled the monitoring well network and the private drinking water supply well at 124 Hanover Pike on August 24, 2017 and September 20, 2017 as part of the rebound assessment. MTBE concentrations for MW-8 (329 μg/l) exceeded the 300 μg/l threshold value in the samples collected on September 20, 2017. Based on these results, AECOM reactivated the groundwater remediation system on October 2, 2017.

On November 21, 2017, AECOM reconfigured the pumps in monitoring wells MW-8 and MW-9 to begin pumping when the water level reaches 32 feet (ft) in MW-8 and 30 ft. in MW-9 and to stop pumping when the water level reaches the bottom of the pumps. This approach allows for groundwater to fully recharge and a flushing of potential petroleum compounds in the soil column above the areas that are dewatered during continuous operation of the recovery wells.

AECOM deactivated the remediation system on August 31, 2018 to begin another controlled rebound assessment according to the Approval of Rebound Assessment Request letter from MDE dated July 31, 2018. During the monitoring period, AECOM collected samples from the monitoring well network and the private drinking water supply well at 124 Hanover Pike on a monthly basis for the first three months, and now quarterly thereafter for the monitoring wells. The potable well at 124 Hanover Pike is now sampled every other month. The groundwater remediation system will remain inactive as long as contaminant concentrations remain stable and/or on a decreasing trend and MTBE remains below 300 μg/l.

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The remediation system was initially started on October 8, 2013 and a total of 9,234,440 gallons of treated groundwater have been discharged. Water was not discharged from the system during this reporting period (January through March 2019). Groundwater extraction data is provided in Table 6 and a summary of quarterly system performance data is displayed in the table below.

MW-8 MW-9 MW-10 Average Pumping

Rate (GPM)

Gallons Recovered

Average Pumping

Rate (GPM)

Gallons Recovered

Average Pumping

Rate (GPM)

Gallons Recovered

Q4-2013 1.15 137,828 0.24 26,235 2.30 332,092 Q1-2014 0.90 108,866 0.01 1,158 3.30 389,494 Q2-2014 0.87 104,407 0.24 22,867 3.11 399,438 Q3-2014 0.83 100,511 0.31 36,908 3.13 374,051 Q4-2014 0.76 114,120 0.29 43,668 3.38 504,232 Q1-2015 0.68 83,938 0.24 30,054 3.62 444,593 Q2-2015 0.65 84,683 0.25 36,558 3.71 535,796 Q3-2015 0.42 47,837 0.17 19,887 2.78 325,970 Q4-2015 0.56 59,981 0.28 30,427 3.86 436,601 Q1-2016 0.38 50,628 0.21 28,987 4.56 595,612 Q2-2016 0.49 34,010 0.29 20,556 4.60 594,517 Q3-2016 0.50 37,510 0.34 19,867 4.42 530,340 Q4-2016 0.38 27,038 0.21 14,434 3.88 554,229 Q1-2017 0.46 54,242 0.19 22,876 3.75 443,591 Q2-2017 0.18 16,352 0.08 7,272 1.24 110,310 Q3-2017 0.00 93 0.00 154 0.00 2,580 Q4-2017 0.25 34,851 0.14 18,817 2.21 313,553 Q1-2018 0.29 38,419 0.25 32,095 1.84 234,873 Q2-2018 0.36 48,469 0.27 36,491 1.79 245,629 Q3-2018 0.39 35,190 0.27 24,318 1.93 174,337 Totals: 0.53 1,218,973 0.21 473,629 3.00 7,541,838

Note: Flow restriction issues resulted in the inoperability of the pump in MW-9 from 1/28/14 through 5/6/14.

• Depth-to-water during this quarter in monitoring well MW-8 was 21.28 feet bgs on March 7, 2019(non-pumping conditions).



Groundwater drawdown graphs of the pumping wells MW-8, MW-9 and MW-10 are provided in Attachment D.

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Groundwater Treatment System Analytical Summary

The groundwater treatment system was not sampled this quarter due to the system deactivation. A summary of the analytical results is provided in Table 7. Graphs depicting the air stripper MTBE and TPH-GRO influent concentrations over time are provided in Attachment E.

Summary

Based on historical analytical data and groundwater flow direction, dissolved-phase MTBE was initially concentrated in the area near the tank field (MW-1 and MW-6). MTBE concentrations in well MW-1 have dropped nearly two orders of magnitude since the well was sampled in July 2005. MTBE continues to remain below the detection limit (BDL) in monitoring wells MW-1, MW-2, MW-3, MW-4, MW-5, MW-6, MW-7, and MW-10. All dissolved-phase gasoline compounds in bedrock well MW-7 have reported concentrations below detection limits since June 2014. All dissolved-phase gasoline compounds in bedrock well MW-10 have reported concentrations below detection limits since May 2016. MTBE concentrations in bedrock wells MW-8 and MW-9 decreased this quarter and have shown an overall decreasing trend since June 2011. Furthermore, MTBE influent concentrations in the potable well servicing 124 Hanover Pike have remained below detection limits since June 2014.

Per MDE approval, the groundwater remediation system was deactivated on August 31, 2018 to begin the rebound assessment. During the rebound assessment, all monitoring wells and the potable well at 124 Hanover Pike were sampled on a monthly basis for the first three months and are now sampled quarterly. The groundwater remediation system will continue to remain inactive as long as contaminant concentrations remain stable and/or on a decreasing trend and MTBE remains below 300 μg/l.

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ACTIVITIES FOR THE SECOND QUARTER 2019

• April 2019 – Continue System Rebound Assessment. Complete carbon change of 124Hanover Pike potable well treatment system as necessary.

• May 2019 – Continue System Rebound Assessment. Conduct every other month samplingof the potable well at 124 Hanover Pike treatment system; complete carbon change of 124Hanover Pike potable well treatment system as necessary.

• June 2019 – Continue System Rebound Assessment. Conduct quarterly gauging andsampling of monitoring and tank field wells and the on-site potable well; complete carbonchange of 124 Hanover Pike potable well treatment system as necessary.

FIGURES

TABLES

Table 1: Depth to Water and Groundwater Elevation of Monitoring Wells7-Eleven Store No. 32785

Hampstead, Maryland

Well Top of Casing Date Depth to Water (ft bgs) Corrected ElevationMW-1 96.54 7/25/05 24.47 72.07

8/18/05 25.98 70.56Installed 7/7/05 1/25/06 24.92 71.62Total depth 35' 7/11/06 25.74 70.80Screened 15' to 35' 9/7/06 28.08 68.464" casing; .020 slot screen 1/9/07 25.45 71.09

6/14/07 25.32 71.2211/30/07 31.10 65.442/14/08 29.20 67.345/23/08 25.04 71.508/7/08 25.36 71.18

12/3/08 27.22 69.322/12/09 26.15 70.395/12/09 23.56 72.988/19/09 24.86 71.6811/4/09 21.88 74.662/26/10 22.26 74.285/13/10 23.85 72.698/17/10 25.37 71.17

11/28/10 28.04 68.502/2/11 28.78 67.76

3/31/11 23.52 73.024/6/11 24.26 72.28

5/26/11 22.25 74.296/28/11 25.66 70.887/29/11 26.25 70.298/26/11 25.03 71.519/26/11 23.75 72.79

10/14/11 24.45 72.0911/23/11 23.71 72.8312/20/11 21.85 74.691/10/12 22.09 74.452/24/12 24.28 72.263/8/12 23.63 72.916/7/12 21.54 75.00

7/17/12 24.69 71.858/21/12 24.34 72.209/19/12 26.18 70.36

10/24/12 24.74 71.8010/31/12 23.67 72.8711/27/12 24.14 72.4012/21/12 25.20 71.341/22/13 24.07 72.472/26/13 23.40 73.143/29/13 22.60 73.944/17/13 23.78 72.765/30/13 24.57 71.976/5/13 24.98 71.56

7/23/13 24.88 71.668/29/13 26.09 70.459/25/13 27.68 68.86

10/14/13 26.21 70.3310/15/13 25.68 70.8610/17/13 25.04 71.5010/21/13 24.77 71.7711/14/13 26.10 70.4411/25/13 26.48 70.0612/16/13 23.81 72.731/13/14 22.28 74.261/29/14 NA --2/10/14 22.00 74.543/11/14 20.59 75.954/21/14 19.04 77.50

page 1 of 23


Hampstead, Maryland

Well Top of Casing Date Depth to Water (ft bgs) Corrected Elevation5/7/14 18.05 78.496/9/14 19.69 76.85

7/23/14 21.04 75.508/22/14 22.49 74.059/16/14 25.11 71.43

10/31/14 24.81 71.7311/24/14 25.41 71.1312/3/14 34.30 62.241/23/15 23.89 72.652/25/15 NA --3/16/15 22.88 73.664/21/15 23.75 72.795/31/15 24.72 71.826/22/15 23.68 72.867/22/15 24.56 71.988/28/15 26.76 69.789/23/15 26.81 69.73

10/20/15 25.65 70.8911/16/15 24.42 72.1212/16/15 24.76 71.781/20/16 22.76 73.782/4/16 NG NG3/4/16 20.25 76.29

4/20/16 21.75 74.795/19/16 22.70 73.846/2/16 23.24 73.30

7/14/16 22.64 73.908/16/16 24.18 72.369/16/16 26.53 70.01

10/17/16 25.17 71.3711/21/16 27.28 69.2612/16/16 26.03 70.511/11/17 25.61 70.932/28/17 24.27 72.273/16/17 22.96 73.585/2/17 24.32 72.22

5/24/17 23.30 73.246/5/17 22.80 73.74

7/24/17 25.25 71.298/24/17 24.15 72.399/20/17 25.86 70.68

10/26/17 25.61 70.9311/8/17 25.00 71.5412/8/17 27.54 69.001/9/18 28.45 68.092/6/18 27.46 69.08

3/26/18 25.64 70.904/30/18 23.82 72.725/30/18 22.07 74.476/29/18 21.41 75.137/30/18 19.71 76.838/27/18 17.37 79.179/11/18 18.12 78.42

10/19/18 19.41 77.1311/20/18 18.34 78.2012/6/18 18.65 77.893/7/19 19.85 76.69

page 2 of 23


Hampstead, Maryland



6/14/07 27.51 71.1611/30/07 33.37 65.302/14/08 32.17 66.505/23/08 28.63 70.048/7/08 28.58 70.09

12/3/08 31.07 67.602/12/09 29.10 69.575/12/09 28.56 70.118/19/09 28.56 70.1111/4/09 27.27 71.402/26/10 25.49 73.185/13/10 25.33 73.348/17/10 28.98 69.69

11/28/10 30.78 67.892/2/11 31.34 67.33

3/31/11 26.01 72.664/6/11 28.63 70.04

5/26/11 26.46 72.216/28/11 27.59 71.087/29/11 29.38 69.298/26/11 29.97 68.709/26/11 27.99 70.68

10/14/11 27.49 71.1811/23/11 27.19 71.4812/20/11 22.24 76.431/10/12 25.82 72.852/24/12 26.39 72.283/8/12 26.66 72.016/7/12 27.22 71.45

7/17/12 28.41 70.268/21/12 28.50 70.179/19/12 29.13 69.54

10/24/12 29.14 69.5310/31/12 28.94 69.7311/27/12 28.51 70.1612/21/12 27.76 70.911/22/13 27.67 71.002/26/13 26.86 71.813/29/13 26.60 72.074/17/13 26.83 71.845/30/13 27.41 71.266/5/13 27.70 70.97

7/23/13 27.67 71.008/29/13 29.15 69.529/25/13 30.29 68.38

10/14/13 31.34 67.3310/15/13 31.43 67.2410/17/13 31.45 67.2210/21/13 31.57 67.1011/14/13 31.82 66.8511/25/13 32.17 66.5012/16/13 31.49 67.181/13/14 29.88 68.791/29/14 28.68 69.992/10/14 28.75 69.923/11/14 27.81 70.864/21/14 26.22 72.45

page 3 of 23


Hampstead, Maryland


7/23/14 26.55 72.128/22/14 27.90 70.779/16/14 29.00 69.67

10/31/14 30.48 68.1911/24/14 30.73 67.9412/3/14 30.80 67.871/23/15 29.95 66.592/25/15 30.05 66.493/16/15 29.59 69.084/21/15 29.30 69.375/31/15 30.91 67.766/22/15 30.54 68.137/22/15 29.63 69.048/28/15 31.11 67.569/23/15 31.20 67.47

10/20/15 32.24 66.4311/16/15 32.22 66.4512/16/15 32.22 66.451/20/16 31.30 67.372/4/16 31.15 67.523/4/16 29.21 69.46

4/20/16 28.20 70.475/19/16 28.66 70.016/2/16 30.29 68.38

7/14/16 29.53 69.148/16/16 30.25 68.429/16/16 31.91 66.76

10/17/16 32.31 66.3611/21/16 33.20 65.4712/16/16 31.64 67.031/11/17 31.76 66.912/28/17 30.19 68.483/16/17 29.83 68.845/2/17 30.87 67.80

5/24/17 28.95 69.726/5/17 28.70 69.97

7/24/17 28.99 69.688/24/17 28.91 69.769/20/17 29.35 69.32

10/23/17 31.99 66.6811/8/17 32.32 66.3512/8/17 32.21 66.461/9/18 31.77 66.902/6/18 31.95 66.72

3/26/18 29.78 68.894/30/18 28.80 69.875/30/18 27.63 71.046/29/18 26.31 72.367/30/18 25.62 73.058/27/18 22.85 75.829/11/18 22.51 76.16

10/19/18 21.54 77.1311/20/18 22.06 76.6112/6/18 21.98 76.693/7/19 22.81 75.86

page 4 of 23


Hampstead, Maryland



6/14/07 26.85 70.6611/30/07 32.45 65.062/14/08 29.80 67.715/23/08 24.09 73.428/7/08 26.85 70.66

12/3/08 29.55 67.962/12/09 28.17 69.345/12/09 25.63 71.888/19/09 27.15 70.3611/4/09 23.84 73.672/26/10 NG --5/13/10 24.64 72.878/17/10 26.04 71.47

11/28/10 29.93 67.582/2/11 NG --

3/31/11 NG --4/6/11 26.33 71.18

5/26/11 24.52 72.996/28/11 27.32 70.197/29/11 29.02 68.498/26/11 28.00 69.519/26/11 25.48 72.03

10/14/11 26.27 71.2411/23/11 25.38 72.1312/20/11 24.12 73.391/10/12 24.48 73.032/24/12 26.09 71.423/8/12 25.58 71.936/7/12 23.96 73.55

7/17/12 26.86 70.658/21/12 26.61 70.909/19/12 28.22 69.29

10/24/12 26.41 72.2610/31/12 25.36 73.3111/27/12 25.96 72.7112/21/12 26.85 71.821/22/13 25.55 73.122/26/13 25.27 73.403/29/13 24.96 72.554/17/13 25.86 71.655/30/13 26.58 70.936/5/13 26.89 70.62

7/23/13 26.80 70.718/29/13 28.20 69.319/25/13 29.94 67.57

10/14/13 26.21 71.3010/15/13 25.28 72.2310/17/13 24.41 73.1010/21/13 24.24 73.2711/14/13 25.05 72.4611/25/13 25.12 72.3912/16/13 23.48 74.031/13/14 23.02 74.491/29/14 24.96 72.552/10/14 21.90 75.613/11/14 20.42 77.094/21/14 19.28 78.23

page 5 of 23


Hampstead, Maryland


7/23/14 NG --8/22/14 NG --9/16/14 22.90 74.61

10/31/14 23.41 74.1011/24/14 23.73 73.7812/3/14 23.14 74.371/23/15 22.50 75.012/25/15 NA --3/16/15 19.77 77.744/21/15 20.96 76.555/31/15 22.03 75.486/22/15 21.21 76.307/22/15 22.39 75.128/28/15 29.29 68.229/23/15 29.36 68.15

10/20/15 25.92 71.5911/16/15 23.82 73.6912/16/15 24.48 73.031/20/16 22.63 74.882/4/16 NG NG3/4/16 20.69 76.82

4/20/16 21.18 76.335/19/16 21.46 76.056/2/16 21.33 76.18

7/14/16 21.76 75.758/16/16 22.33 75.189/16/16 26.15 71.36

10/17/16 25.40 72.1111/21/16 26.88 70.6312/16/16 28.19 69.321/11/17 27.43 70.082/28/17 26.82 70.693/16/17 20.13 77.385/2/17 25.98 71.53

5/24/17 26.68 70.836/5/17 25.40 72.11

7/24/17 28.03 69.488/24/17 27.23 70.289/20/17 28.39 69.12

10/23/17 25.42 72.0911/8/17 24.11 73.4012/8/17 28.29 69.221/9/18 29.59 67.922/6/18 28.44 69.07

3/26/18 25.72 71.794/30/18 24.06 73.455/30/18 22.30 75.216/29/18 21.62 75.897/30/18 17.38 80.138/27/18 17.25 80.269/11/18 18.25 79.26

10/19/18 21.32 76.1911/20/18 20.40 77.1112/6/18 21.05 76.463/7/19 22.39 75.12

page 6 of 23


Hampstead, Maryland

Well Top of Casing Date Depth to Water (ft bgs) Corrected ElevationMW-4 96.30 7/25/05 NI --

8/18/05 NI --Installed 11/21/05 1/25/06 23.78 72.52Total depth 35' 7/11/06 24.06 72.24Screened 15' to 35' 9/7/06 28.29 68.014" casing; .020 slot screen 1/9/07 23.91 72.39

6/14/07 25.49 70.8111/30/07 31.07 65.232/14/08 28.36 67.945/23/08 23.06 73.248/7/08 25.40 70.90

12/3/08 28.98 67.322/12/09 26.65 69.655/12/09 23.93 72.378/19/09 25.43 70.8711/4/09 22.00 74.302/26/10 22.79 73.515/13/10 23.25 73.058/17/10 25.91 70.39

11/28/10 28.44 67.862/2/11 29.19 67.11

3/31/11 23.94 72.364/6/11 24.63 71.67

5/26/11 22.84 73.466/28/11 25.85 70.457/29/11 27.44 68.868/26/11 25.97 70.339/26/11 23.78 72.52

10/14/11 24.77 71.5311/23/11 24.32 71.9812/20/11 22.47 73.831/10/12 22.85 73.452/24/12 24.49 71.813/8/12 24.20 72.106/7/12 22.01 74.29

7/17/12 25.19 71.118/21/12 NG --9/19/12 26.63 69.67

10/24/12 25.05 71.2510/31/12 24.48 71.8211/27/12 24.36 71.9412/21/12 25.46 70.841/22/13 24.12 72.182/26/13 23.67 72.633/29/13 23.38 72.924/17/13 24.34 71.965/30/13 26.37 69.936/5/13 25.45 70.85

7/23/13 25.24 71.068/29/13 26.61 69.699/25/13 29.48 66.82

10/14/13 25.88 70.4210/15/13 24.65 71.6510/17/13 23.67 72.6310/21/13 23.50 72.8011/14/13 24.32 71.9811/25/13 24.35 71.9512/16/13 22.81 73.491/13/14 22.07 74.231/29/14 NA NA2/10/14 20.90 75.403/11/14 19.56 76.744/21/14 19.00 77.30

page 7 of 23


Hampstead, Maryland


7/23/14 21.50 74.808/22/14 22.78 73.529/16/14 24.83 71.47

10/31/14 24.81 71.4911/24/14 24.89 71.4112/3/14 24.08 72.221/23/15 23.13 73.172/25/15 23.91 72.393/16/15 21.18 75.124/21/15 23.00 73.305/31/15 24.41 71.896/22/15 23.52 72.787/22/15 24.21 72.098/28/15 27.52 68.789/23/15 27.63 68.67

10/20/15 24.50 71.8011/16/15 22.87 73.4312/16/15 23.27 73.031/20/16 21.55 74.752/4/16 21.01 75.293/4/16 19.36 76.94

4/20/16 21.24 75.065/19/16 22.31 73.996/2/16 22.27 74.03

7/14/16 22.80 73.508/16/16 24.11 72.199/16/16 24.57 71.73

10/17/16 23.61 72.6911/21/16 25.27 71.0312/16/16 26.30 70.001/11/17 26.02 70.282/28/17 25.35 70.953/16/17 21.76 74.545/2/17 24.38 71.92

5/24/17 24.61 71.696/5/17 23.31 72.99

7/24/17 26.30 70.008/24/17 25.45 70.859/20/17 26.61 69.69

10/23/17 24.02 72.2811/8/17 23.40 72.9012/8/17 26.82 69.481/9/18 27.95 68.352/6/18 27.20 69.10

3/26/18 25.54 70.764/30/18 24.20 72.105/30/18 22.62 73.686/29/18 21.88 74.427/30/18 18.65 77.658/27/18 17.03 79.279/11/18 18.95 77.35

10/19/18 19.95 76.3511/20/18 18.66 77.6412/6/18 19.37 76.933/7/19 20.76 75.54

page 8 of 23


Hampstead, Maryland

Well Top of Casing Date Depth to Water (ft bgs) Corrected ElevationMW-5 98.35 7/25/05 NI --

8/18/05 NI --Installed 11/22/05 1/25/06 27.55 70.80Total depth 35' 7/11/06 28.54 69.81Screened 15' to 35' 9/7/06 29.97 68.384" casing; .020 slot screen 1/9/07 28.08 70.27

6/14/07 27.38 70.9711/30/07 33.06 65.292/14/08 31.74 66.615/23/08 28.02 70.338/7/08 28.18 70.17

12/3/08 30.45 67.902/12/09 28.67 69.685/12/09 27.88 70.478/19/09 28.20 70.1511/4/09 26.55 71.802/26/10 25.22 73.135/13/10 25.21 73.148/17/10 28.62 69.73

11/28/10 30.49 67.862/2/11 35.96 62.39

3/31/11 27.91 70.444/6/11 28.05 70.30

5/26/11 25.96 72.396/28/11 27.47 70.887/29/11 29.18 69.178/26/11 29.40 68.959/26/11 27.36 70.99

10/14/11 27.11 71.2411/23/11 26.85 71.5012/20/11 25.71 72.641/10/12 25.43 72.922/24/12 26.30 72.053/8/12 26.42 71.936/7/12 26.45 71.90

7/17/12 27.66 70.698/21/12 27.98 70.379/19/12 28.79 69.56

10/24/12 28.52 69.8310/31/12 28.28 70.0711/27/12 27.10 71.2512/21/12 27.41 70.941/22/13 27.14 71.212/26/13 26.38 71.973/29/13 26.13 72.224/17/13 26.59 71.765/30/13 27.30 71.056/5/13 27.68 70.67

7/23/13 27.56 70.798/29/13 28.81 69.549/25/13 30.00 68.35

10/14/13 NG NG10/15/13 30.73 67.6210/17/13 30.64 67.7110/21/13 30.64 67.7111/14/13 NG NG11/25/13 31.16 67.1912/16/13 30.15 68.201/13/14 28.72 69.631/29/14 NA NA2/10/14 27.67 70.683/11/14 26.49 71.864/21/14 24.94 73.41

page 9 of 23


Hampstead, Maryland


7/23/14 25.52 72.838/22/14 26.85 71.509/16/14 28.16 70.19

10/31/14 29.38 68.9711/24/14 29.69 68.6612/3/14 29.70 68.651/23/15 28.78 69.572/25/15 29.22 69.133/16/15 28.00 70.354/21/15 28.69 69.665/31/15 30.92 67.436/22/15 29.10 69.257/22/15 29.25 69.108/28/15 30.33 68.029/23/15 30.67 67.68

10/20/15 31.25 67.1011/16/15 30.78 67.5712/16/15 30.91 67.441/20/16 NG NG2/4/16 29.62 68.733/4/16 27.41 70.94

4/20/16 26.80 71.555/19/16 27.27 71.086/2/16 27.90 70.45

7/14/16 NG NG8/16/16 28.03 70.329/16/16 30.92 67.43

10/17/16 30.99 67.3611/21/16 32.01 66.3412/16/16 30.83 67.521/11/17 29.58 68.772/28/17 28.34 70.013/16/17 26.62 71.735/2/17 29.97 68.38

5/24/17 28.34 70.016/5/17 28.00 70.35

7/14/17 28.71 69.648/24/17 28.51 69.849/20/17 29.13 69.22

10/23/17 31.08 67.2711/8/17 31.15 67.2012/8/17 31.65 66.701/9/18 NG NG2/6/18 31.55 66.80

3/26/18 25.39 72.964/30/18 NG NG5/30/18 27.08 71.276/29/18 25.81 72.547/30/18 19.71 78.648/27/18 22.14 76.219/11/18 22.19 76.16

10/19/18 21.80 76.5511/20/18 22.05 76.3012/6/18 22.06 76.293/7/19 22.99 75.36

page 10 of 23


Hampstead, Maryland



5/13/10 24.06 71.688/17/10 27.08 68.66

11/28/10 29.18 66.562/2/11 29.72 66.02

3/31/11 25.84 69.904/6/11 26.20 69.54

5/26/11 24.36 71.386/28/11 26.40 69.347/29/11 27.98 67.768/26/11 27.40 68.349/26/11 25.46 70.28

10/14/11 25.63 70.1111/23/11 25.37 70.3712/20/11 23.91 71.831/10/12 23.92 71.822/24/12 24.81 70.933/8/12 25.19 70.556/7/12 24.10 71.64

7/17/12 26.15 69.598/21/12 26.24 69.509/19/12 27.36 68.38

10/24/12 26.68 69.0610/31/12 26.22 69.5211/27/12 25.52 70.2212/21/12 26.10 69.641/22/13 27.48 68.262/26/13 24.87 70.873/29/13 24.55 71.194/17/13 25.20 70.545/30/13 25.82 69.926/5/13 26.18 69.56

7/23/13 26.26 69.488/29/13 27.38 68.369/25/13 28.80 66.94

10/14/13 28.34 67.4010/15/13 27.95 67.7910/17/13 27.44 68.3010/21/13 27.21 68.5311/14/13 27.69 68.0511/25/13 28.00 67.7412/16/13 26.41 69.331/13/14 25.35 70.391/29/14 25.21 70.532/10/14 24.36 71.383/11/14 22.92 72.824/21/14 21.51 74.23

page 11 of 23


Hampstead, Maryland


7/23/14 22.69 73.058/22/14 23.88 71.869/16/14 25.66 70.08

10/31/14 26.81 68.9311/24/14 26.70 69.0412/3/14 26.70 69.041/23/15 25.57 70.172/25/15 26.02 69.723/16/15 24.15 71.594/21/15 24.77 70.975/31/15 26.15 69.596/22/15 25.34 70.407/22/15 25.76 69.988/28/15 28.18 67.569/23/15 28.81 66.93

10/20/15 27.97 67.7711/16/15 26.70 69.0412/16/15 26.95 68.791/20/16 25.55 70.192/4/16 25.34 70.403/4/16 23.20 72.54

4/20/16 23.56 72.185/19/16 24.11 71.636/2/16 24.51 71.23

7/14/16 24.50 71.248/16/16 25.48 70.269/16/16 27.82 67.92

10/17/16 27.16 68.5811/21/16 28.80 66.9412/16/16 28.35 67.391/11/17 27.32 68.422/28/17 26.69 69.053/16/17 23.71 72.035/2/17 27.08 68.66

5/24/17 26.19 69.556/5/07 25.50 70.24

7/24/17 27.18 68.568/24/17 26.71 69.039/20/17 27.60 68.14

10/23/17 27.75 67.9911/8/17 27.31 68.4312/8/17 29.26 66.481/9/18 29.72 66.022/6/18 29.39 66.35

3/26/18 27.29 68.454/30/18 26.00 69.745/30/18 24.47 71.276/29/18 23.42 72.327/30/18 21.43 74.318/27/18 19.06 76.689/11/18 18.95 76.79

10/19/18 20.64 75.1011/20/18 20.35 75.3912/6/18 20.55 75.193/7/19 21.79 73.95

page 12 of 23


Hampstead, Maryland


2/12/09 28.14 67.57Installed 11/17/08 5/12/09 27.12 68.59Total depth 200' 8/19/09 27.54 68.176' steel casing to 92' 11/4/09 26.05 69.66

2/26/10 24.31 71.405/13/10 24.40 71.318/17/10 27.85 67.86

11/28/10 29.62 66.092/2/11 30.28 65.43

3/31/11 27.38 68.334/6/11 27.30 68.41

5/26/11 25.24 70.476/28/11 26.68 69.037/29/11 28.41 67.308/26/11 28.16 67.559/26/11 26.73 68.98

10/14/11 26.63 69.0811/23/11 26.03 69.6812/20/11 24.98 70.731/10/12 24.68 71.032/24/12 25.52 70.193/8/12 25.65 70.066/7/12 26.02 69.69

7/17/12 27.02 68.698/21/12 27.27 68.449/19/12 28.01 67.70

10/24/12 27.90 67.8110/31/12 27.62 68.0911/27/12 26.38 69.3312/21/12 26.80 68.911/22/13 26.38 69.332/26/13 25.64 70.073/29/13 25.39 70.324/17/13 25.69 70.025/30/13 26.45 69.266/5/13 26.83 68.88

7/23/13 26.82 68.898/29/13 28.12 67.599/25/13 29.17 66.54

10/14/13 30.92 64.7910/15/13 31.40 64.3110/17/13 31.53 64.1810/21/13 31.51 64.2011/14/13 31.81 63.9011/25/13 32.41 63.3012/16/13 31.52 64.191/13/14 29.93 65.781/29/14 NA NA2/10/14 28.92 66.793/11/14 27.95 67.764/21/14 26.30 69.41

page 13 of 23


Hampstead, Maryland


7/23/14 26.52 69.198/22/14 27.84 67.879/16/14 29.02 66.69

10/31/14 30.25 65.4611/24/14 30.71 65.0012/3/14 30.83 64.881/23/15 29.76 65.952/25/15 29.17 66.543/16/15 29.05 66.664/21/15 27.25 68.465/31/15 31.29 64.426/22/15 30.21 65.507/22/15 30.35 65.368/28/15 29.19 66.529/23/15 29.90 65.81

10/20/15 32.23 63.4811/16/15 31.99 63.7212/16/15 32.00 63.711/20/16 30.94 64.772/4/16 30.87 64.843/4/16 28.74 66.97

4/20/16 27.80 67.915/19/16 28.33 67.386/2/16 29.94 65.77

7/14/16 29.03 66.688/16/16 29.63 66.089/16/16 32.60 63.11

10/17/16 32.09 63.6211/21/16 33.02 62.6912/16/16 30.15 65.561/11/17 29.12 66.592/28/17 28.16 67.553/16/17 28.57 67.145/2/17 30.45 65.26

5/24/17 27.64 68.076/5/17 27.35 68.36

7/24/17 27.88 67.838/24/17 27.72 67.999/20/17 29.87 65.84

10/23/17 31.89 63.8211/8/17 32.05 63.6612/8/17 31.90 63.811/9/18 31.41 64.302/6/18 30.99 64.72

3/26/18 29.02 66.694/30/18 27.96 67.755/30/18 26.94 68.776/29/18 25.85 69.867/30/18 24.70 71.018/27/18 22.11 73.609/11/18 21.95 73.76

10/19/18 21.13 74.5811/20/18 21.33 74.3812/6/18 21.56 74.153/7/19 22.30 73.41

page 14 of 23


Hampstead, Maryland



2/26/10 23.17 73.805/13/10 23.24 73.738/17/10 26.24 70.73

11/28/10 28.30 68.672/2/11 29.83 67.14

3/31/11 25.93 71.044/6/11 25.91 71.06

5/26/11 24.14 72.836/28/11 25.53 71.447/29/11 27.26 69.718/26/11 27.51 69.469/26/11 26.55 70.42

10/14/11 25.30 71.6711/23/11 24.95 72.0212/20/11 23.70 73.271/10/12 23.51 73.462/24/12 24.21 72.763/8/12 24.24 72.736/7/12 24.42 72.55

7/17/12 25.72 71.258/21/12 26.02 70.959/19/12 26.72 70.25

10/24/12 26.45 70.5210/31/12 26.17 70.8011/27/12 25.06 71.9112/21/12 25.67 71.301/22/13 25.10 71.872/26/13 24.39 72.583/29/13 24.15 72.824/17/13 24.51 72.465/30/13 25.25 71.726/5/13 25.56 71.41

7/23/13 25.62 71.358/29/13 26.89 70.089/25/13 28.04 68.93

10/14/13 85.23 **10/15/13 150.90 **10/17/13 158.33 **10/21/13 162.16 **11/14/12 153.81 **11/25/13 155.56 **12/16/13 160.70 **1/13/14 146.80 **1/29/13 129.04 **2/10/14 174.40 **3/11/14 NG NG4/21/14 109.34 **

page 15 of 23


Hampstead, Maryland

Well Top of Casing Date Depth to Water (ft bgs) Corrected Elevation5/7/14 166.17 **6/9/14 132.62 **

7/23/14 140.62 **8/22/14 145.61 **9/16/14 149.94 **

10/31/14 124.51 **11/24/14 172.50 **12/3/14 119.50 **1/23/15 159.91 **2/25/15 181.20 **3/16/15 182.27 **4/21/15 155.27 **5/31/15 167.31 **6/22/15 169.65 **7/22/15 183.12 **8/28/15 128.06 **9/23/15 28.70 68.27

10/20/15 181.35 **11/16/15 182.40 **12/16/15 175.22 **1/20/16 165.70 **2/4/16 NG NG3/4/16 103.00 **

4/20/16 33.29 63.685/19/16 32.66 64.316/2/16 182.70 **

7/14/16 32.66 64.318/16/16 33.21 63.769/16/16 182.15 **

10/17/16 181.85 **11/21/16 181.45 **12/16/16 28.52 68.451/11/17 183.81 **2/28/17 181.95 **3/16/17 182.19 **5/2/17 174.15 **

5/24/17 26.31 70.666/5/17 25.90 71.07

7/24/17 27.00 69.978/24/17 26.48 70.499/20/17 27.11 69.86

10/23/17 181.79 **11/8/17 182.13 **12/8/17 181.51 **1/9/18 112.75 **2/6/18 54.37 **

3/26/18 57.63 **4/30/18 63.03 **5/30/18 73.23 **6/29/18 127.30 **7/30/18 84.35 **8/27/18 75.16 **9/11/18 20.25 76.72

10/19/18 20.24 76.7311/20/18 20.18 76.7912/6/18 20.35 76.623/7/19 21.28 75.69

page 16 of 23


Hampstead, Maryland



5/26/11 24.10 73.166/28/11 25.53 71.737/29/11 27.23 70.038/26/11 27.51 69.759/26/11 25.98 71.28

10/14/11 25.18 72.0811/23/11 24.70 72.5612/20/11 23.77 73.491/10/12 23.54 73.722/24/12 24.17 73.093/8/12 24.58 72.686/7/12 25.15 72.11

7/17/12 25.50 71.768/21/12 26.05 71.219/19/12 26.49 70.77

10/24/12 26.49 70.7710/31/12 26.30 70.9611/27/12 24.96 72.3012/21/12 25.44 71.821/22/13 24.99 72.272/26/13 24.45 72.813/29/13 24.25 73.014/17/13 24.54 72.725/30/13 25.34 71.926/5/13 25.70 71.56

7/23/13 25.73 71.538/29/13 26.94 70.329/25/13 28.02 69.24

10/14/13 47.95 **10/15/13 58.64 **10/17/13 147.10 **11/14/13 127.01 **11/25/13 115.24 **12/16/13 102.31 **1/13/14 100.21 **1/29/14 104.50 **2/10/14 58.83 **3/11/14 57.08 **4/21/14 53.60 **

page 17 of 23


Hampstead, Maryland


7/23/14 140.06 **8/22/14 141.43 **9/16/14 142.47 **

10/31/14 148.82 **11/24/14 147.61 **12/3/14 146.55 **1/23/15 140.81 **2/25/15 139.63 **3/16/15 138.27 **4/21/15 137.41 **5/31/15 149.89 **6/22/15 150.44 **7/22/15 149.32 **8/28/15 157.94 **9/23/15 28.56 68.70

10/20/15 161.90 **11/16/15 160.41 **12/16/15 156.65 **1/20/16 154.64 **2/4/16 153.88 **3/4/16 133.00 **

4/20/16 65.53 31.735/19/16 66.51 30.756/2/16 157.15 **

7/14/16 79.99 17.278/16/16 71.60 25.669/16/16 162.20 **

10/17/16 164.97 **11/21/16 168.85 **12/16/16 28.77 68.491/11/17 162.19 **2/28/17 165.83 **3/16/17 160.36 **5/2/17 140.80 **

5/24/17 26.58 70.686/5/17 26.08 71.18

7/24/17 26.55 70.718/24/17 26.53 70.739/20/17 27.05 70.21

10/23/17 170.72 **11/8/17 169.10 **12/8/17 176.70 **1/9/18 72.90 **2/6/18 73.42 **

3/26/18 136.29 **4/30/18 96.08 **5/30/18 94.50 **6/29/18 88.45 **7/30/18 124.22 **8/27/18 80.70 **9/11/18 20.36 76.90

10/19/18 20.40 76.8611/20/18 20.36 76.9012/6/18 20.51 76.753/7/19 21.44 75.82

page 18 of 23


Hampstead, Maryland



5/26/11 24.17 72.236/28/11 27.51 68.897/29/11 28.25 68.158/26/11 28.80 67.609/26/11 26.52 69.88

10/14/11 26.15 70.2511/23/11 25.74 70.6612/20/11 24.85 71.551/10/12 24.56 71.842/24/12 26.26 70.143/8/12 25.62 70.786/7/12 26.09 70.31

7/17/12 27.03 69.378/21/12 NG --9/19/12 27.85 68.55

10/24/12 26.99 69.4110/31/12 27.36 69.0411/27/12 26.15 70.2512/21/12 26.41 69.991/22/13 26.20 70.202/26/13 25.46 70.943/29/13 25.28 71.124/17/13 25.51 70.895/30/13 25.01 71.396/5/13 26.79 69.61

7/23/13 26.72 69.688/29/13 27.99 68.419/25/13 29.05 67.35

10/14/13 69.35 **10/15/13 92.20 **10/17/13 95.10 **10/21/13 94.08 **11/14/13 107.75 **11/25/13 126.95 **12/16/13 130.54 **1/13/14 131.18 **1/29/14 130.39 **2/10/14 129.70 **3/11/14 134.35 **4/21/14 134.77 **

page 19 of 23


Hampstead, Maryland


7/23/14 109.10 **8/22/14 111.10 **9/16/14 116.20 **

10/31/14 123.60 **11/24/14 126.90 **12/3/14 128.10 **1/23/15 131.13 **2/25/15 135.74 **3/16/14 134.02 **4/21/15 140.50 **5/31/15 145.23 **6/22/15 147.75 **7/22/15 101.09 **8/28/15 149.37 **9/23/15 29.72 66.68

10/20/15 174.02 **11/16/15 175.48 **12/16/15 175.90 **1/20/16 173.50 **2/4/16 174.80 **3/4/16 134.00 **

4/20/16 156.40 **5/19/16 173.10 **6/2/16 175.70 **

7/14/16 175.71 **8/16/16 175.45 **9/16/16 177.25 **

10/17/16 177.19 **11/21/16 NG **12/16/16 29.41 66.991/11/17 175.24 **2/28/17 178.67 **3/16/17 176.84 **5/2/17 136.80 **

5/24/17 27.25 69.156/5/17 26.81 69.59

7/24/17 27.91 68.498/24/17 27.46 68.949/20/17 28.13 68.27

10/23/17 168.70 **11/8/17 168.35 **12/8/17 117.45 **1/9/18 60.16 **2/6/18 59.92 **

3/26/18 61.37 **4/30/18 60.59 **5/30/18 59.89 **6/29/18 61.49 **7/30/18 60.60 **8/27/18 61.25 **9/11/18 20.90 75.50

10/19/18 21.37 75.0311/20/18 21.18 75.2212/6/18 21.33 75.073/7/19 22.39 74.01

page 20 of 23


Hampstead, Maryland

Well Top of Casing Date Depth to Water (ft bgs) Corrected ElevationINJ-1 11/4/09 23.72 --

2/26/10 NG --Installed 9/28/09 5/13/10 NG --Total depth 35' 3/31/11 NG --Screened 10' to 35' 4/6/11 NG --2" casing; .020 slot screen 5/26/11 23.94 --

6/28/11 26.33 --7/29/11 28.02 --8/26/11 27.45 --9/26/11 25.16 --

10/14/11 NG --11/23/11 NG --12/20/11 NG --

INJ-2 11/4/09 24.04 --2/26/10 23.75 --

Installed 9/28/09 5/13/10 NG --Total depth 35' 3/31/11 NG --Screened 10' to 35' 4/6/11 NG --2" casing; .020 slot screen 5/26/11 24.58 --

6/28/11 26.49 --7/29/11 28.14 --8/26/11 27.05 --9/26/11 24.82 --

10/14/11 NG --11/23/11 NG --12/20/11 NG --

INJ-3 11/4/09 24.33 --2/26/10 23.80 --


6/28/11 26.53 --7/29/11 28.16 --8/26/11 27.67 --9/26/11 25.71 --

10/14/11 NG --11/23/11 NG --12/20/11 NG --

INJ-4 11/4/09 24.51 --2/26/10 24.01 --


6/28/11 26.76 --7/29/11 28.29 --8/26/11 27.93 --9/26/11 25.96 --

10/14/11 NG --11/23/11 NG --12/20/11 NG --

page 21 of 23


Hampstead, Maryland

Well Top of Casing Date Depth to Water (ft bgs) Corrected ElevationTF-1 96.74 7/25/05 Dry --

4" PVC 8/18/05 Dry --Total Depth 13' 1/25/06 Dry --

7/11/06 Dry --9/7/06 NG --1/9/07 Dry --

6/14/07 Dry --11/30/07 Dry --2/14/08 Dry --5/23/08 Dry --8/7/08 Dry --

12/3/08 Dry --2/12/09 Dry --5/12/09 Dry --8/19/09 Dry --11/4/09 Dry --2/26/10 Dry --5/13/10 Dry --8/17/10 Dry --

11/28/10 Dry --2/2/11 NG --

3/31/11 Dry --4/6/11 NG --

5/26/11 Dry --6/28/11 Dry --7/29/11 NG --8/26/11 Dry --9/26/11 Dry --

10/14/11 NG --11/23/11 NG --12/20/11 Dry --1/10/12 NG --2/24/12 NG --3/8/12 Dry --

page 22 of 23


Hampstead, Maryland

Well Top of Casing Date Depth to Water (ft bgs) Corrected ElevationTF-2 97.08 7/25/05 Dry --

4" PVC 8/18/05 Dry --Total Depth 13' 1/25/06 Dry --

7/11/06 Dry --9/7/06 NG --1/9/07 Dry --

6/14/07 Dry11/30/07 Dry --2/14/08 Dry --5/23/08 Dry --8/7/08 Dry

12/3/08 Dry --2/12/09 Dry --5/12/09 Dry --8/19/09 Dry --11/4/09 Dry --2/26/10 Dry --5/13/10 Dry --8/17/10 Dry --

11/28/10 Dry --2/2/11 Dry --

3/31/11 Dry --4/6/11 NG --

5/26/11 12.95 --6/28/11 12.95 --7/29/11 NG --8/26/11 Dry --9/26/11 Dry --

10/14/11 NG --11/23/11 NG --12/20/11 Dry --1/10/12 NG --2/24/12 NG --3/8/12 Dry --

Groundwater Remediation System Started on October 8, 2013Submersible pumps deployed into monitoring wells MW-8, MW-9 and MW-10ft bgs - feet below ground surfaceNI - not installedNG - not gaugedNA - Frozen access** represents well is under pumping conditions

page 23 of 23

Table 2: Groundwater Analytical Results of Monitoring Well Sampling7-Eleven Store No. 32785

Hampstead, Maryland

Sample ID Date Benzene(µg/L)

Toluene(µg/L)

Ethyl-benzene

(µg/L)

Xylenes(µg/L)

BTEX(µg/L)

MTBE(µg/L)

TBA(µg/L)

TAME(µg/L)

TPH-GRO(µg/L)

TPH-DRO(mg/L)

MW-1 7/25/05 ND@20 ND@20 ND@20 ND@60 ND 31,000 28,000 1,300 NA NA1/25/06 ND@1 ND@1 ND@1 ND@3 ND 22,000 17,000 E1,000 NA NA7/11/06 ND@1 ND@1 ND@1 ND@3 ND E 22,000 12,000 E 600 NA NA1/9/07 ND@1 ND@1 ND@1 ND@3 ND ND@1 13,000 ND@1000 NA NA

6/14/07 ND@1 ND@1 ND@1 ND@3 ND E 6,500 E 680 140 450 [email protected]/30/07 ND@1 ND@1 ND@1 ND@3 ND 11,000 2,900 ND@1000 720 [email protected]/14/08 ND@10 ND@10 ND@10 ND@30 ND 16,000 2,900 370 16,000 [email protected]/23/08 ND@200 ND@200 ND@200 ND@600 ND 23,000 14,000 ND@2000 40,000 [email protected]/7/08 ND@10 ND@10 ND@10 ND@30 ND 4,600 ND@200 ND@100 1,100 [email protected]

12/3/08 ND@10 ND@10 ND@10 ND@30 ND 1,200 ND@200 ND@100 670 [email protected]/12/09 ND@1 ND@1 ND@1 ND@3 ND 370 ND@20 ND@10 ND@100 [email protected]/12/09 ND@1 ND@1 ND@1 ND@3 ND 530 ND@20 14 ND@100 [email protected]/19/09 ND@1 ND@1 ND@1 ND@3 ND 56 ND@20 ND@10 ND@100 NA11/4/09 ND@1 ND@1 ND@1 ND@3 ND 190 ND@20 ND@10 240 NA2/26/10 ND@1 ND@1 ND@1 ND@3 ND 54 ND@20 ND@10 ND@100 NA5/13/10 ND@1 ND@1 ND@1 ND@3 ND 340 86 ND@10 310 NA8/17/10 ND@1 ND@1 ND@1 ND@3 ND 6 ND@20 ND@10 ND@100 NA11/28/10 ND@1 ND@1 ND@1 ND@3 ND 3 ND@20 ND@10 ND@100 NA

2/2/11 ND@1 ND@1 ND@1 ND@3 ND 3 ND@20 ND@10 ND@100 NA6/28/11 ND@1 ND@1 ND@1 ND@3 ND 97 ND@20 ND@10 ND@100 NA9/29/11 ND@1 ND@1 ND@1 ND@3 ND 52 ND@20 ND@10 ND@100 NA12/20/11 ND@1 ND@1 ND@1 ND@3 ND 15 ND@20 ND@10 ND@100 NA

3/8/12 ND@1 ND@1 ND@1 ND@3 ND 6.8 ND@20 ND@10 ND@100 NA6/8/12 ND@1 ND@1 ND@1 ND@3 ND 6.9 ND@20 ND@10 ND@100 NA

9/19/12 ND@1 ND@1 ND@1 ND@3 ND 1.8 ND@20 ND@10 ND@100 NA12/21/12 ND@1 ND@1 ND@1 ND@3 ND 8.2 ND@20 ND@10 ND@100 NA3/29/13 ND@1 ND@1 ND@1 ND@3 ND ND@1 ND@20 ND@10 ND@100 NA6/5/13 ND@1 ND@1 ND@1 ND@3 ND ND@1 ND@20 ND@10 ND@100 NA

9/25/13 ND@1 ND@1 ND@1 ND@3 ND ND@1 ND@20 ND@10 ND@100 NA12/16/13 ND@1 ND@1 ND@1 ND@3 ND 26 ND@20 ND@10 ND@100 NA3/11/14 ND@1 ND@1 ND@1 ND@3 ND 14 ND@20 ND@10 ND@100 NA6/9/14 ND@1 ND@1 ND@1 ND@3 ND 1 ND@20 ND@10 ND@100 NA

9/16/14 ND@1 ND@1 ND@1 ND@3 ND 11 ND@20 ND@10 ND@100 NA12/3/14 ND@1 ND@1 ND@1 ND@3 ND ND@1 ND@20 ND@10 ND@100 NA3/16/15 ND@1 ND@1 ND@1 ND@2 ND 2.3 ND@10 ND@1 ND@100 NA6/22/15 ND@1 ND@1 ND@1 ND@3 ND ND@1 ND@10 ND@1 ND@100 NA7/22/15 ND@1 ND@1 ND@1 ND@3 ND 1.8 ND@10 ND@1 ND@100 NA9/23/15 ND@1 ND@1 ND@1 ND@3 ND ND@1 ND@10 ND@1 ND@100 NA12/16/15 ND@1 ND@1 ND@1 ND@3 ND 6.6 ND@10 ND@1 ND@100 NA


9/16/16 ND@1 ND@1 ND@1 ND@3 ND 5.1 ND@10 ND@1 ND@100 NA12/16/16 ND@1 ND@1 ND@1 ND@3 ND 2.2 ND@10 ND@1 ND@100 NA3/16/17 ND@1 ND@1 ND@1 ND@3 ND 6.0 ND@10 ND@1 ND@100 NA6/5/17 ND@1 ND@1 ND@1 ND@3 ND ND@1 ND@10 ND@1 ND@100 NA

8/24/17 ND@1 ND@1 ND@1 ND@3 ND ND@1 ND@10 ND@1 ND@100 NA9/20/17 ND@1 ND@1 ND@1 ND@3 ND ND@1 ND@10 ND@1 ND@100 NA12/8/17 ND@1 3.39 ND@1 ND@3 3.39 ND@1 ND@10 ND@1 ND@100 NA3/26/18 ND@1 ND@1 ND@1 ND@3 ND ND@1 ND@10 ND@1 ND@100 NA6/29/18 ND@1 ND@1 ND@1 ND@3 ND ND@1 ND@10 ND@1 ND@100 NA9/11/18 ND@1 ND@1 ND@1 ND@3 ND ND@1 ND@10 ND@1 ND@100 NA10/19/18 ND@1 ND@1 ND@1 ND@3 ND ND@1 ND@10 ND@1 ND@100 NA11/21/18 ND@1 ND@1 ND@1 ND@3 ND ND@1 ND@10 ND@1 ND@100 NA12/6/18 ND@1 ND@1 ND@1 ND@3 ND ND@1 ND@10 ND@1 ND@100 NA3/7/19 ND@1 ND@1 ND@1 ND@3 ND ND@1 ND@10 ND@1 ND@100 NA

Page 1 of 14


Hampstead, Maryland


Toluene(µg/L)

Ethyl-benzene

(µg/L)

Xylenes(µg/L)

BTEX(µg/L)

MTBE(µg/L)

TBA(µg/L)

TAME(µg/L)

TPH-GRO(µg/L)

TPH-DRO(mg/L)

MW-2 7/25/05 ND@1 ND@1 ND@1 ND@3 ND 1 ND@25 ND@25 NA NA1/25/06 ND@1 ND@1 ND@1 ND@3 ND ND@1 ND@25 ND@25 NA NA7/11/06 ND@1 ND@1 ND@1 ND@3 ND ND@1 30 ND@25 NA NA1/9/07 ND@1 ND@1 ND@1 ND@3 ND ND@1 ND@10 ND@10 NA NA

6/14/07 ND@1 ND@1 ND@1 ND@3 ND ND@1 ND@10 ND@10 ND@100 [email protected]/30/07 ND@1 ND@1 ND@1 ND@3 ND ND@1 ND@10 ND@10 ND@100 [email protected]/14/08 ND@1 ND@1 ND@1 ND@3 ND ND@1 ND@10 ND@10 ND@100 [email protected]/23/08 ND@1 ND@1 ND@1 ND@3 ND ND@1 ND@10 ND@10 ND@100 [email protected]/7/08 ND@1 ND@1 ND@1 ND@3 ND ND@1 ND@20 ND@10 ND@100 [email protected]

12/3/08 ND@1 ND@1 ND@1 ND@3 ND ND@1 ND@20 ND@10 ND@100 [email protected]/12/09 ND@1 ND@1 ND@1 ND@3 ND ND@1 ND@20 ND@10 ND@100 [email protected]/12/09 ND@1 ND@1 ND@1 ND@3 ND ND@1 ND@20 ND@10 ND@100 [email protected]/19/09 ND@1 ND@1 ND@1 ND@3 ND 14 ND@20 ND@10 ND@100 NA11/4/09 ND@1 ND@1 ND@1 ND@3 ND 7 ND@20 ND@10 ND@100 NA2/26/10 ND@1 ND@1 ND@1 ND@3 ND 8 ND@20 ND@10 ND@100 NA5/13/10 ND@1 ND@1 ND@1 ND@3 ND 31 ND@20 ND@10 ND@100 NA8/17/10 ND@1 ND@1 ND@1 ND@3 ND 53 ND@20 ND@10 ND@100 NA11/28/10 ND@1 ND@1 ND@1 ND@3 ND 35 ND@20 ND@10 ND@100 NA


3/8/12 ND@1 ND@1 ND@1 ND@3 ND 28 ND@20 ND@10 ND@100 NA6/8/12 ND@1 ND@1 ND@1 ND@3 ND 33 ND@20 ND@10 ND@100 NA



9/16/14 ND@1 ND@1 ND@1 ND@3 ND 5 ND@20 ND@10 ND@100 NA12/3/14 ND@1 ND@1 ND@1 ND@3 ND 7.8 ND@20 ND@10 ND@100 NA3/16/14 ND@1 ND@1 ND@1 ND@2 ND 4.9 ND@10 ND@1 ND@100 NA6/22/15 ND@1 ND@1 ND@1 ND@3 ND 5.2 ND@10 ND@1 ND@100 NA7/22/15 ND@1 ND@1 ND@1 ND@3 ND 5.5 ND@10 ND@1 ND@100 NA9/23/15 ND@1 ND@1 ND@1 ND@3 ND 2.4 ND@10 ND@1 ND@100 NA12/16/15 ND@1 ND@1 ND@1 ND@3 ND 4.3 ND@10 ND@1 ND@100 NA


9/16/16 ND@1 ND@1 ND@1 ND@3 ND ND@1 ND@10 ND@1 ND@100 NA12/16/16 ND@1 ND@1 ND@1 ND@3 ND ND@1 ND@10 ND@1 ND@100 NA3/16/17 ND@1 ND@1 ND@1 ND@3 ND ND@1 ND@10 ND@1 ND@100 NA6/5/17 ND@1 ND@1 ND@1 ND@3 ND ND@1 ND@10 ND@1 ND@100 NA

8/24/17 ND@1 ND@1 ND@1 ND@3 ND ND@1 ND@10 ND@1 ND@100 NA9/20/17 ND@1 ND@1 ND@1 ND@3 ND ND@1 ND@10 ND@1 ND@100 NA12/8/17 ND@1 ND@1 ND@1 ND@3 ND ND@1 ND@10 ND@1 ND@100 NA3/26/18 ND@1 ND@1 ND@1 ND@3 ND ND@1 ND@10 ND@1 ND@100 NA6/29/18 ND@1 ND@1 ND@1 ND@3 ND ND@1 ND@10 ND@1 ND@100 NA9/11/18 ND@1 ND@1 ND@1 ND@3 ND ND@1 ND@10 ND@1 ND@100 NA10/19/18 ND@1 ND@1 ND@1 ND@3 ND ND@1 ND@10 ND@1 ND@100 NA11/20/18 ND@1 ND@1 ND@1 ND@3 ND ND@1 ND@10 ND@1 ND@100 NA12/6/18 ND@1 ND@1 ND@1 ND@3 ND ND@1 ND@10 ND@1 ND@100 NA3/7/19 ND@1 ND@1 ND@1 ND@3 ND ND@1 ND@10 ND@1 ND@100 NA

Page 2 of 14


Hampstead, Maryland


Toluene(µg/L)

Ethyl-benzene

(µg/L)

Xylenes(µg/L)

BTEX(µg/L)

MTBE(µg/L)

TBA(µg/L)

TAME(µg/L)

TPH-GRO(µg/L)

TPH-DRO(mg/L)

MW-3 7/25/05 ND@1 ND@1 ND@1 ND@3 ND 290 180 ND@25 NA NA1/25/06 ND@1 ND@1 ND@1 ND@3 ND ND@1 ND@25 ND@25 NA NA7/11/06 ND@1 ND@1 ND@1 ND@3 ND 390 140 ND@25 NA NA1/9/07 ND@1 ND@1 ND@1 ND@3 ND 4 ND@10 ND@10 NA NA


12/3/08 ND@1 ND@1 ND@1 ND@3 ND ND@1 ND@20 ND@10 ND@100 [email protected]/12/09 ND@1 ND@1 ND@1 ND@3 ND ND@1 ND@20 ND@10 ND@100 [email protected]/12/09 ND@1 ND@1 ND@1 ND@3 ND ND@1 ND@20 ND@10 ND@100 [email protected]/19/09 ND@1 ND@1 ND@1 ND@3 ND ND@1 ND@20 ND@10 ND@100 NA11/4/09 ND@1 ND@1 ND@1 ND@3 ND ND@1 ND@20 ND@10 ND@100 NA2/26/10 NS NS NS NS NS NS NS NS NS NS5/13/10 ND@1 ND@1 ND@1 ND@3 ND ND@1 ND@20 ND@10 ND@100 NA8/17/10 ND@1 ND@1 ND@1 ND@3 ND ND@1 ND@20 ND@10 ND@100 NA11/28/10 ND@1 ND@1 ND@1 ND@3 ND ND@1 ND@20 ND@10 ND@100 NA

2/2/11 NS NS NS NS NS NS NS NS NS NS6/28/11 ND@1 ND@1 ND@1 ND@3 ND ND@1 ND@20 ND@10 ND@100 NA9/29/11 ND@1 ND@1 ND@1 ND@3 ND ND@1 ND@20 ND@10 ND@100 NA12/20/11 ND@1 ND@1 ND@1 ND@3 ND ND@1 ND@20 ND@10 ND@100 NA

3/8/12 ND@1 ND@1 ND@1 ND@3 ND ND@1 ND@20 ND@10 ND@100 NA6/8/12 ND@1 ND@1 ND@1 ND@3 ND ND@1 ND@20 ND@10 ND@100 NA



9/16/14 ND@1 ND@1 ND@1 ND@3 ND ND@1 ND@20 ND@10 ND@100 NA12/3/14 ND@1 ND@1 ND@1 ND@3 ND ND@1 ND@20 ND@10 ND@100 NA3/16/15 ND@1 ND@1 ND@1 ND@3 ND ND@1 ND@10 ND@1 ND@100 NA6/22/15 ND@1 ND@1 ND@1 ND@3 ND ND@1 ND@10 ND@1 ND@100 NA7/22/15 ND@1 ND@1 ND@1 ND@3 ND ND@1 ND@10 ND@1 ND@100 NA9/23/15 ND@1 ND@1 ND@1 ND@3 ND ND@1 ND@10 ND@1 ND@100 NA12/16/15 ND@1 ND@1 ND@1 ND@3 ND ND@1 ND@10 ND@1 ND@100 NA




Page 3 of 14


Hampstead, Maryland


Toluene(µg/L)

Ethyl-benzene

(µg/L)

Xylenes(µg/L)

BTEX(µg/L)

MTBE(µg/L)

TBA(µg/L)

TAME(µg/L)

TPH-GRO(µg/L)

TPH-DRO(mg/L)

MW-4 7/25/05 NI NI NI NI NI NI NI NI NA NA1/25/06 ND@1 ND@1 ND@1 ND@3 ND 2 ND@25 ND@25 NA NA7/11/06 ND@1 ND@1 ND@1 ND@3 ND 6 ND@25 ND@25 NA NA1/9/07 ND@1 ND@1 ND@1 ND@3 ND 4 ND@10 ND@10 NA NA


12/3/08 ND@1 ND@1 ND@1 ND@3 ND ND@1 ND@20 ND@10 ND@100 [email protected]/12/09 ND@1 ND@1 ND@1 ND@3 ND ND@1 ND@20 ND@10 ND@100 [email protected]/12/09 ND@1 ND@1 ND@1 ND@3 ND ND@1 ND@20 ND@10 ND@100 [email protected]/19/09 ND@1 ND@1 ND@1 ND@3 ND ND@1 ND@20 ND@10 ND@100 NA11/4/09 ND@1 ND@1 ND@1 ND@3 ND ND@1 ND@20 ND@10 ND@100 NA2/26/10 ND@1 ND@1 ND@1 ND@3 ND 15 ND@20 ND@10 ND@100 NA5/13/10 ND@1 ND@1 ND@1 ND@3 ND 15 ND@20 ND@10 ND@100 NA8/17/10 ND@1 ND@1 ND@1 ND@3 ND 64 ND@20 ND@10 ND@100 NA11/28/10 ND@1 ND@1 ND@1 ND@3 ND 4 ND@20 ND@10 ND@100 NA

2/2/11 ND@1 ND@1 ND@1 ND@3 ND 5 ND@20 ND@10 ND@100 NA6/28/11 ND@1 ND@1 ND@1 ND@3 ND ND@1 ND@20 ND@10 ND@100 NA9/29/11 ND@1 ND@1 ND@1 ND@3 ND ND@1 ND@20 ND@10 ND@100 NA12/20/11 ND@1 ND@1 ND@1 ND@3 ND ND@1 ND@20 ND@10 ND@100 NA








Page 4 of 14


Hampstead, Maryland


Toluene(µg/L)

Ethyl-benzene

(µg/L)

Xylenes(µg/L)

BTEX(µg/L)

MTBE(µg/L)

TBA(µg/L)

TAME(µg/L)

TPH-GRO(µg/L)

TPH-DRO(mg/L)

MW-5 7/25/05 NI NI NI NI NI NI NI NI NA NA1/25/06 ND@1 ND@1 ND@1 ND@3 ND ND@1 ND@25 ND@25 NA NA7/11/06 ND@1 ND@1 ND@1 ND@3 ND ND@1 ND@25 ND@25 NA NA1/9/07 ND@1 ND@1 ND@1 ND@3 ND ND@1 ND@10 ND@10 NA NA

6/14/07 ND@1 ND@1 ND@1 ND@3 ND ND@1 ND@10 ND@10 ND@100 [email protected]/30/07 ND@1 ND@1 ND@1 ND@3 ND ND@1 ND@10 ND@10 ND@100 [email protected]/14/08 ND@1 ND@1 ND@1 ND@3 ND ND@1 ND@10 ND@10 ND@100 [email protected]/23/08 ND@1 ND@1 ND@1 ND@3 ND ND@1 ND@10 ND@10 ND@100 [email protected]/7/08 ND@1 ND@1 ND@1 ND@3 ND 7 ND@20 ND@10 ND@100 [email protected]

12/3/08 ND@1 ND@1 ND@1 ND@3 ND 1 ND@20 ND@10 ND@100 [email protected]/12/09 ND@1 ND@1 ND@1 ND@3 ND 1 ND@20 ND@10 ND@100 [email protected]/12/09 ND@1 ND@1 ND@1 ND@3 ND 5 ND@20 ND@10 ND@100 [email protected]/19/09 ND@1 ND@1 ND@1 ND@3 ND 3 ND@20 ND@10 ND@100 NA11/4/09 ND@1 ND@1 ND@1 ND@3 ND 5 ND@20 ND@10 ND@100 NA2/26/10 ND@1 ND@1 ND@1 ND@3 ND 5 ND@20 ND@10 ND@100 NA5/13/10 ND@1 ND@1 ND@1 ND@3 ND 6 ND@20 ND@10 ND@100 NA8/17/10 ND@1 ND@1 ND@1 ND@3 ND 4 ND@20 ND@10 ND@100 NA11/28/10 ND@1 ND@1 ND@1 ND@3 ND 6 ND@20 ND@10 ND@100 NA

2/2/11 ND@1 ND@1 ND@1 ND@3 ND 7 ND@20 ND@10 ND@100 NA6/28/11 ND@1 ND@1 ND@1 ND@3 ND 3 ND@20 ND@10 ND@100 NA9/29/11 ND@1 ND@1 ND@1 ND@3 ND 4 ND@20 ND@10 ND@100 NA12/20/11 ND@1 ND@1 ND@1 ND@3 ND 2.4 ND@20 ND@10 ND@100 NA


9/19/12 ND@1 ND@1 ND@1 ND@3 ND 1.4 ND@20 ND@10 ND@100 NA12/21/12 ND@1 ND@1 ND@1 ND@3 ND ND@1 ND@20 ND@10 ND@100 NA3/29/13 ND@1 ND@1 ND@1 ND@3 ND ND@1 ND@20 ND@10 ND@100 NA6/5/13 ND@1 ND@1 ND@1 ND@3 ND ND@1 ND@20 ND@10 ND@100 NA

9/25/13 ND@1 ND@1 ND@1 ND@3 ND 1.1 ND@20 ND@10 ND@100 NA12/16/13 ND@1 ND@1 ND@1 ND@3 ND 1.6 ND@20 ND@10 ND@100 NA3/11/14 ND@1 ND@1 ND@1 ND@3 ND 1.3 ND@20 ND@10 ND@100 NA6/9/14 ND@1 ND@1 ND@1 ND@3 ND 3.4 ND@20 ND@10 ND@100 NA

9/16/14 ND@1 ND@1 ND@1 ND@3 ND 2.2 ND@20 ND@10 ND@100 NA12/3/14 ND@1 ND@1 ND@1 ND@3 ND 4.2 ND@20 ND@10 ND@100 NA3/16/15 ND@1 ND@1 ND@1 ND@2 ND 4.7 ND@10 ND@1 ND@100 NA6/22/15 ND@1 ND@1 ND@1 ND@3 ND 6.2 ND@10 ND@1 ND@100 NA7/22/15 ND@1 ND@1 ND@1 ND@3 ND 7.5 ND@10 ND@1 ND@100 NA9/23/15 ND@1 ND@1 ND@1 ND@3 ND 7.2 ND@10 ND@1 ND@100 NA12/16/15 ND@1 ND@1 ND@1 ND@3 ND 6.5 ND@10 ND@1 ND@100 NA


9/16/16 ND@1 ND@1 ND@1 ND@3 ND 2.2 ND@10 ND@1 ND@100 NA12/16/16 ND@1 ND@1 ND@1 ND@3 ND 2.1 ND@10 ND@1 ND@100 NA3/16/17 ND@1 ND@1 ND@1 ND@3 ND ND@1 ND@10 ND@1 ND@100 NA6/5/17 ND@1 ND@1 ND@1 ND@3 ND ND@1 ND@10 ND@1 ND@100 NA

8/24/17 ND@1 ND@1 ND@1 ND@3 ND ND@1 ND@10 ND@1 ND@100 NA9/20/17 ND@1 ND@1 ND@1 ND@3 ND ND@1 ND@10 ND@1 ND@100 NA12/8/17 ND@1 ND@1 ND@1 ND@3 ND 1.52 ND@10 ND@1 ND@100 NA3/26/18 ND@1 ND@1 ND@1 ND@3 ND ND@1 ND@10 ND@1 ND@100 NA6/29/18 ND@1 ND@1 ND@1 ND@3 ND ND@1 ND@10 ND@1 ND@100 NA9/11/18 ND@1 ND@1 ND@1 ND@3 ND ND@1 ND@10 ND@1 ND@100 NA10/19/18 ND@1 ND@1 ND@1 ND@3 ND ND@1 ND@10 ND@1 ND@100 NA11/20/18 ND@1 ND@1 ND@1 ND@3 ND ND@1 ND@10 ND@1 ND@100 NA12/6/18 ND@1 ND@1 ND@1 ND@3 ND ND@1 ND@10 ND@1 ND@100 NA3/7/19 ND@1 ND@1 ND@1 ND@3 ND ND@1 ND@10 ND@1 ND@100 NA

Page 5 of 14


Hampstead, Maryland


Toluene(µg/L)

Ethyl-benzene

(µg/L)

Xylenes(µg/L)

BTEX(µg/L)

MTBE(µg/L)

TBA(µg/L)

TAME(µg/L)

TPH-GRO(µg/L)

TPH-DRO(mg/L)

MW-6 12/3/08 ND@100 ND@100 ND@100 ND@300 ND 20,000 ND@2000 ND@1000 9,600 [email protected]/12/09 ND@10 ND@10 ND@10 ND@30 ND 15,000 70 550 2,800 [email protected]/12/09 ND@1 ND@1 ND@1 ND@3 ND 18,000 470 640 2,700 [email protected]/19/09 ND@1 ND@1 ND@1 ND@3 ND 17,000 810 450 3,300 NA11/4/09 ND@1 ND@1 ND@1 ND@3 ND 17,000 1,500 370 33,000 NA2/26/10 ND@1 ND@1 ND@1 ND@3 ND 14,000 3,600 230 16,000 NA5/13/10 ND@1 ND@1 ND@1 ND@3 ND 12,000 3,400 180 15,000 NA6/11/10 ND@1 ND@1 ND@1 ND@3 ND 11,000 4,500 230 14,000 NA8/17/10 ND@1 ND@1 ND@1 ND@3 ND 14,000 1,300 250 19,000 NA11/28/10 ND@1 ND@1 ND@1 ND@3 ND 11,000 2,500 200 12,000 NA

2/2/11 ND@1 ND@1 ND@1 ND@3 ND 9,300 1,500 180 14,000 NA5/26/11 ND@1 ND@1 ND@1 ND@3 ND 6,700 400 100 8,600 NA6/28/11 ND@1 ND@1 ND@1 ND@3 ND 7,900 910 90 8,400 NA9/29/11 ND@1 ND@1 ND@1 ND@3 ND 8,600 ND@2000 ND@1000 4,400 NA12/20/11 ND@1 ND@1 ND@1 ND@3 ND 6,500 460 76 5,100 NA

3/8/12 ND@1 ND@1 ND@1 ND@3 ND 3,200 210 ND@50 4,200 NA6/8/12 ND@5 ND@5 ND@5 ND@15 ND 2,600 150 ND@50 3,200 NA

9/19/12 ND@1 ND@1 ND@1 ND@3 ND 2,200 100 23 2,300 NA12/21/12 ND@1 ND@1 ND@1 ND@3 ND 1,900 58 21 1,700 NA3/29/13 ND@1 ND@1 ND@1 ND@3 ND 890 ND@100 ND@50 910 NA6/5/13 ND@1 ND@1 ND@1 ND@3 ND 1,100 32 12 1,000 NA9/25/13 ND@1 ND@1 ND@1 ND@3 ND 1,100 26 12 690 NA

12/16/13 ND@1 ND@1 ND@1 ND@3 ND 1,900 ND@100 ND@50 2,500 NA3/11/14 ND@1 ND@1 ND@1 ND@3 ND 1,100 ND@100 ND@50 1,900 NA6/9/14 ND@1 ND@1 ND@1 ND@3 ND 720 ND@100 ND@50 720 NA9/16/14 ND@1 ND@1 ND@1 ND@3 ND 630 ND@100 ND@50 640 NA12/3/14 ND@1 ND@1 ND@1 ND@3 ND 600 ND@20 ND@10 500 NA3/16/15 ND@1 ND@1 ND@1 ND@2 ND 78 ND@10 ND@1 ND@100 NA6/22/15 ND@1 ND@1 ND@1 ND@3 ND 196 ND@10 1.23 ND@100 NA7/22/15 ND@1 ND@1 ND@1 ND@3 ND 200 ND@10 1.61 ND@100 NA9/23/15 ND@1 ND@1 ND@1 ND@3 ND 139 ND@10 1.11 125 NA

12/16/15 ND@1 ND@1 ND@1 ND@3 ND 82.2 ND@10 ND@1 ND@100 NA3/4/16 ND@1 ND@1 ND@1 ND@3 ND 36.6 ND@10 ND@1 ND@100 NA6/2/16 ND@1 ND@1 ND@1 ND@3 ND 29.9 ND@10 ND@1 ND@100 NA

9/16/16 ND@1 ND@1 ND@1 ND@3 ND 23.8 ND@10 ND@1 ND@100 NA12/16/16 ND@1 ND@1 ND@1 ND@3 ND 8.59 ND@10 ND@1 ND@100 NA3/16/17 ND@1 ND@1 ND@1 ND@3 ND 4.65 ND@10 ND@1 ND@100 NA6/5/17 ND@1 ND@1 ND@1 ND@3 ND 1.86 ND@10 ND@1 ND@100 NA

8/24/17 ND@1 ND@1 ND@1 ND@3 ND 3.25 ND@10 ND@1 ND@100 NA9/20/17 ND@1 ND@1 ND@1 ND@3 ND 4.32 ND@10 ND@1 ND@100 NA12/8/17 ND@1 ND@1 ND@1 ND@3 ND 3.79 ND@10 ND@1 ND@100 NA3/26/18 ND@1 ND@1 ND@1 ND@3 ND 3.38 ND@10 ND@1 ND@100 NA6/29/18 ND@1 ND@1 ND@1 ND@3 ND 1.70 ND@10 ND@1 ND@100 NA9/11/18 ND@1 ND@1 ND@1 ND@3 ND ND@1 ND@10 ND@1 ND@100 NA10/19/18 ND@1 ND@1 ND@1 ND@3 ND ND@1 ND@10 ND@1 ND@100 NA11/21/18 ND@1 ND@1 ND@1 ND@3 ND ND@1 ND@10 ND@1 ND@100 NA12/6/18 ND@1 ND@1 ND@1 ND@3 ND ND@1 ND@10 ND@1 ND@100 NA3/7/19 ND@1 ND@1 ND@1 ND@3 ND ND@1 ND@10 ND@1 ND@100 NA

Page 6 of 14


Hampstead, Maryland


Toluene(µg/L)

Ethyl-benzene

(µg/L)

Xylenes(µg/L)

BTEX(µg/L)

MTBE(µg/L)

TBA(µg/L)

TAME(µg/L)

TPH-GRO(µg/L)

TPH-DRO(mg/L)

MW-7 12/3/08 ND@1 ND@1 ND@1 ND@3 ND ND@1 ND@20 ND@10 ND@100 [email protected]/12/09 ND@1 ND@1 ND@1 ND@3 ND ND@1 ND@20 ND@10 ND@100 [email protected]/12/09 ND@1 ND@1 ND@1 ND@3 ND ND@1 ND@20 ND@10 ND@100 [email protected]/19/09 ND@1 ND@1 ND@1 ND@3 ND ND@1 ND@20 ND@10 ND@100 NA11/4/09 ND@1 ND@1 ND@1 ND@3 ND ND@1 ND@20 ND@10 ND@100 NA2/26/10 ND@1 ND@1 ND@1 ND@3 ND ND@1 ND@20 ND@10 ND@100 NA5/13/10 ND@1 ND@1 ND@1 ND@3 ND ND@1 ND@20 ND@10 ND@100 NA8/17/10 ND@1 ND@1 ND@1 ND@3 ND ND@1 ND@20 ND@10 ND@100 NA11/28/10 ND@1 ND@1 ND@1 ND@3 ND ND@1 ND@20 ND@10 ND@100 NA

2/2/11 ND@1 ND@1 ND@1 ND@3 ND 160 ND@20 ND@10 ND@100 NA6/28/11 ND@1 ND@1 ND@1 ND@3 ND ND@1 ND@20 ND@10 ND@100 NA9/29/11 ND@1 ND@1 ND@1 ND@3 ND ND@1 ND@20 ND@10 ND@100 NA12/20/11 ND@1 ND@1 ND@1 ND@3 ND ND@1 ND@20 ND@10 ND@100 NA


9/19/12 ND@1 ND@1 ND@1 ND@3 ND ND@1 ND@20 ND@10 ND@100 NA12/21/12 ND@1 ND@1 ND@1 ND@3 ND ND@1 ND@20 ND@10 ND@100 NA3/29/13 ND@1 ND@1 ND@1 ND@3 ND ND@1 ND@20 ND@10 ND@100 NA6/5/13 ND@1 ND@1 ND@1 ND@3 ND 4.8 ND@20 ND@10 ND@100 NA

9/25/13 ND@1 ND@1 ND@1 ND@3 ND 19 ND@20 ND@10 ND@100 NA12/16/13 ND@1 ND@1 ND@1 ND@3 ND 1.2 ND@20 ND@10 ND@100 NA3/11/14 ND@1 ND@1 ND@1 ND@3 ND 15 ND@20 ND@10 ND@100 NA6/9/14 ND@1 ND@1 ND@1 ND@3 ND 2.5 ND@20 ND@10 ND@100 NA





Page 7 of 14


Hampstead, Maryland


Toluene(µg/L)

Ethyl-benzene

(µg/L)

Xylenes(µg/L)

BTEX(µg/L)

MTBE(µg/L)

TBA(µg/L)

TAME(µg/L)

TPH-GRO(µg/L)

TPH-DRO(mg/L)

MW-8 12/3/08 ND@1 ND@1 ND@1 ND@3 ND ND@1 ND@20 ND@10 ND@100 [email protected]/12/09 ND@1 ND@1 ND@1 ND@3 ND ND@1 ND@20 ND@10 ND@100 [email protected]/12/09 ND@1 ND@1 ND@1 ND@3 ND ND@1 ND@20 ND@10 ND@100 [email protected]/19/09 ND@1 ND@1 ND@1 ND@3 ND ND@1 ND@20 ND@10 ND@100 NA11/4/09 ND@1 ND@1 ND@1 ND@3 ND ND@1 ND@20 ND@10 ND@100 NA2/26/10 ND@1 ND@1 ND@1 ND@3 ND ND@1 ND@20 ND@10 ND@100 NA5/13/10 ND@1 ND@1 ND@1 ND@3 ND ND@1 ND@20 ND@10 ND@100 NA8/17/10 ND@1 ND@1 ND@1 ND@3 ND ND@1 ND@20 ND@10 ND@100 NA11/28/10 ND@1 ND@1 ND@1 ND@3 ND ND@1 ND@20 ND@10 ND@100 NA

2/2/11 ND@1 ND@1 ND@1 ND@3 ND ND@1 ND@20 ND@10 ND@100 NA6/28/11 ND@1 ND@1 ND@1 ND@3 ND 38 ND@20 ND@10 ND@100 NA9/29/11 ND@1 ND@1 ND@1 ND@3 ND 66 ND@20 ND@10 ND@100 NA12/20/11 ND@1 ND@1 ND@1 ND@3 ND 69 ND@20 ND@10 ND@100 NA

3/8/12 ND@1 ND@1 ND@1 ND@3 ND 200 ND@20 ND@10 290 NA6/8/12 ND@1 ND@1 ND@1 ND@3 ND 420 ND@20 12 570 NA

9/19/12 ND@1 ND@1 ND@1 ND@3 ND 500 54 17 580 NA12/21/12 ND@1 ND@1 ND@1 ND@3 ND 940 110 38 1,000 NA3/29/13 ND@1 ND@1 ND@1 ND@3 ND 1,100 150 55 1,000 NA6/5/13 ND@1 ND@1 ND@1 ND@3 ND 1,200 180 50 1,200 NA

9/25/13 ND@1 ND@1 ND@1 ND@3 ND 1,200 150 48 1,000 NA12/16/13 ND@1 ND@1 ND@1 ND@3 ND 530 ND@20 ND@10 600 NA3/11/14 ND@1 ND@1 ND@1 ND@3 ND 1,000 ND@20 ND@10 890 NA6/9/14 ND@1 ND@1 ND@1 ND@3 ND 420 ND@20 ND@10 350 NA

9/16/14 ND@1 ND@1 ND@1 ND@3 ND 60 ND@20 ND@10 ND@100 NA12/3/14 ND@1 ND@1 ND@1 ND@3 ND 16 ND@20 ND@10 ND@100 NA3/16/15 ND@1 ND@1 ND@1 ND@2 ND 8.1 ND@10 ND@1 ND@100 NA6/22/15 ND@1 ND@1 ND@1 ND@3 ND 3.5 ND@10 ND@1 ND@100 NA7/22/15 ND@1 ND@1 ND@1 ND@3 ND 2.5 ND@10 ND@1 ND@100 NA9/23/15 ND@1 ND@1 ND@1 ND@3 ND 308 25.1 5.86 246 NA12/16/15 ND@1 ND@1 ND@1 ND@3 ND 4.5 ND@10 ND@1 ND@100 NA

2/4/16 ND@1 ND@1 ND@1 ND@3 ND 3.3 2.64 J ND@1 NA NA2/16/16 ND@1 ND@1 ND@1 ND@3 ND 14.7 ND@10 ND@1 ND@100 NA3/4/16 ND@1 ND@1 ND@1 ND@3 ND 4.4 ND@10 ND@1 ND@100 NA

3/16/16 ND@1 ND@1 ND@1 ND@3 ND 101 ND@10 2.37 ND@100 NA4/4/16 ND@1 ND@1 ND@1 ND@3 ND 3.2 ND@10 ND@1 ND@100 NA

4/20/16 ND@1 10.5 ND@1 ND@3 10.5 246 48.1 5.95 201 NA5/5/16 ND@1 ND@1 ND@1 ND@3 ND 5.6 23.7 ND@1 ND@100 NA

5/19/16 ND@1 1.17 ND@1 ND@3 1.17 267 25 5.24 264 NA6/2/16 ND@1 ND@1 ND@1 ND@3 ND 4.9 ND@10 ND@1 ND@100 NA

6/14/16 ND@1 ND@1 ND@1 ND@3 ND 152 18.6 3 122 NA7/14/16 ND@1 ND@1 ND@1 ND@3 ND 178 96.5 2.94 172 NA8/1/16 ND@1 ND@1 ND@1 ND@3 ND 4.01 ND@10 ND@1 ND@100 NA


9/16/16 ND@1 ND@1 ND@1 ND@3 ND 3.3 ND@10 ND@1 ND@100 NA10/4/16 ND@1 ND@1 ND@1 ND@3 ND 156 12.4 2.84 193 NA10/17/16 ND@1 ND@1 ND@1 ND@3 ND 6.7 ND@10 ND@1 ND@100 NA11/1/16 ND@1 ND@1 ND@1 ND@3 ND 25.7 ND@10 ND@1 ND@100 NA11/21/16 ND@1 ND@1 ND@1 ND@3 ND 3.3 ND@10 ND@1 ND@100 NA12/16/16 ND@1 ND@1 ND@1 ND@3 ND 79.6 ND@10 ND@1 ND@100 NA12/31/16 ND@1 ND@1 ND@1 ND@3 ND 24.2 ND@10 ND@1 ND@100 NA

Page 8 of 14


Hampstead, Maryland


Toluene(µg/L)

Ethyl-benzene

(µg/L)

Xylenes(µg/L)

BTEX(µg/L)

MTBE(µg/L)

TBA(µg/L)

TAME(µg/L)

TPH-GRO(µg/L)

TPH-DRO(mg/L)

MW-8 1/11/17 ND@1 ND@1 ND@1 ND@3 ND 6.7 ND@10 ND@1 ND@100 NAContinued 1/27/17 ND@1 ND@1 ND@1 ND@3 ND 3.4 ND@10 ND@1 ND@100 NA

2/10/17 ND@1 ND@1 ND@1 ND@3 ND 4.7 ND@10 ND@1 ND@100 NA2/28/17 ND@1 ND@1 ND@1 ND@3 ND 3.2 ND@10 ND@1 ND@100 NA3/16/17 ND@1 ND@1 ND@1 ND@3 ND 3.6 ND@10 ND@1 ND@100 NA3/29/17 ND@1 ND@1 ND@1 ND@3 ND ND@1 ND@10 ND@1 ND@100 NA4/7/17 ND@1 ND@1 ND@1 ND@3 ND 8.94 ND@10 ND@1 ND@100 NA



6/28/17 ND@1 ND@1 ND@1 ND@3 ND 89.6 ND@10 1.46 ND@100 NA7/24/17 ND@1 ND@1 ND@1 ND@3 ND 107 NA NA 134 NA8/24/17 ND@1 ND@1 ND@1 ND@3 ND 273 ND@10 5.35 289 NA9/20/17 ND@1 ND@1 ND@1 ND@3 ND 329 16.2 6.30 434 NA10/13/17 ND@1 ND@1 ND@1 ND@3 ND 34.3 NA NA ND@100 NA10/23/17 ND@1 ND@1 ND@1 ND@3 ND 7.02 NA NA ND@100 NA11/8/17 ND@1 ND@1 ND@1 ND@3 ND 3.33 NA NA ND@100 NA11/27/17 ND@1 ND@1 ND@1 ND@3 ND 164 NA NA 153 NA12/8/17 ND@1 ND@1 ND@1 ND@3 ND 5.65 ND@10 ND@1 ND@100 NA12/26/17 ND@1 3.89 ND@1 ND@3 3.89 28 NA NA ND@100 NA

1/9/18 ND@1 ND@1 ND@1 ND@3 ND 89 NA NA ND@100 NA1/25/18 ND@1 ND@1 ND@1 ND@3 ND 59.6 NA NA ND@100 NA2/6/18 ND@1 ND@1 ND@1 ND@3 ND 47.4 NA NA ND@100 NA

2/19/18 ND@1 ND@1 ND@1 ND@3 ND 48.8 NA NA ND@100 NA3/12/18 ND@1 ND@1 ND@1 ND@3 ND 41.2 NA NA ND@100 NA3/26/18 ND@1 ND@1 ND@1 ND@3 ND 21.2 ND@10 ND@1 ND@100 NA4/17/18 ND@1 ND@1 ND@1 ND@3 ND 18.3 NA NA ND@100 NA4/30/18 ND@1 ND@1 ND@1 ND@3 ND 18 NA NA ND@100 NA5/17/18 ND@1 ND@1 ND@1 ND@3 ND 10.2 NA NA ND@100 NA6/29/18 ND@1 ND@1 ND@1 ND@3 ND 45.4 ND@10 ND@1 ND@100 NA7/17/18 ND@1 ND@1 ND@1 ND@3 ND 6.33 NA NA ND@100 NA9/11/18 ND@1 ND@1 ND@1 ND@3 ND 11.8 NA NA ND@100 NA10/19/18 ND@1 ND@1 ND@1 ND@3 ND 41.4 ND@10 ND@1 ND@100 NA11/20/18 ND@1 ND@1 ND@1 ND@3 ND 103 ND@10 1.84 ND@100 NA12/6/18 ND@1 ND@1 ND@1 ND@3 ND 96.3 ND@10 1.94 106 NA3/7/19 ND@1 ND@1 ND@1 ND@3 ND 68.5 ND@10 1.30 111 NA

Page 9 of 14


Hampstead, Maryland


Toluene(µg/L)

Ethyl-benzene

(µg/L)

Xylenes(µg/L)

BTEX(µg/L)

MTBE(µg/L)

TBA(µg/L)

TAME(µg/L)

TPH-GRO(µg/L)

TPH-DRO(mg/L)

MW-9 6/11/10 ND@1 ND@1 ND@1 ND@3 ND 18 ND@20 ND@10 ND@100 NA8/17/10 ND@1 ND@1 ND@1 ND@3 ND 32 ND@20 ND@10 ND@100 NA11/28/10 ND@1 ND@1 ND@1 ND@3 ND 40 ND@20 ND@10 ND@100 NA

2/2/11 ND@1 ND@1 ND@1 ND@3 ND 130 ND@20 ND@10 140 NA6/28/11 ND@1 ND@1 ND@1 ND@3 ND 340 ND@20 ND@10 350 NA9/29/11 ND@1 ND@1 ND@1 ND@3 ND 520 ND@20 ND@10 340 NA12/20/11 ND@5 ND@5 ND@5 ND@15 ND 440 ND@100 ND@50 390 NA

3/8/12 ND@5 ND@5 ND@5 ND@15 ND 240 30 ND@10 390 NA6/8/12 ND@1 ND@1 ND@1 ND@3 ND 290 34 ND@10 380 NA

9/19/12 ND@1 ND@1 ND@1 ND@3 ND 820 190 34 920 NA12/21/12 ND@1 ND@1 ND@1 ND@3 ND 360 52 14 360 NA3/29/13 ND@1 ND@1 ND@1 ND@3 ND 280 35 12 330 NA6/5/13 ND@1 ND@1 ND@1 ND@3 ND 490 83 21 540 NA

9/25/13 ND@1 ND@1 ND@1 ND@3 ND 1,200 220 51 980 NA12/16/13 ND@1 ND@1 ND@1 ND@3 ND 240 ND@20 ND@10 290 NA3/11/14 ND@1 ND@1 ND@1 ND@3 ND 3,500 840 140 3,800 NA6/9/14 ND@1 ND@1 ND@1 ND@3 ND 760 ND@20 21 660 NA

9/16/14 ND@1 ND@1 ND@1 ND@3 ND 450 ND@20 21 470 NA12/3/14 ND@1 ND@1 ND@1 ND@3 ND 310 ND@20 ND@10 260 NA3/16/15 ND@1 ND@1 ND@1 ND@3 ND 426 ND@10 3.3 405 NA6/22/15 ND@1 ND@1 ND@1 ND@3 ND 113 ND@10 ND@1 ND@100 NA7/22/15 ND@1 ND@1 ND@1 ND@3 ND 105 ND@10 1.1 ND@100 NA9/23/15 ND@1 ND@1 ND@1 ND@3 ND 634 31.1 12.3 494 NA12/16/15 ND@1 ND@1 ND@1 ND@3 ND 151 ND@10 1.6 141 NA

2/4/16 ND@1 ND@1 ND@1 ND@3 ND 72.9 7.35 0.464 J NA NA2/16/16 ND@1 ND@1 ND@1 ND@3 ND 180 16.3 4.6 115 NA3/4/16 ND@1 ND@1 ND@1 ND@3 ND 104 ND@10 ND@1 ND@100 NA

3/16/16 ND@1 ND@1 ND@1 ND@3 ND 48.3 ND@10 1.44 ND@100 NA4/4/16 ND@1 ND@1 ND@1 ND@3 ND 48.4 ND@10 ND@1 ND@100 NA

4/20/16 ND@1 ND@1 ND@1 ND@3 ND ND@1 ND@10 ND@1 ND@100 NA5/5/16 ND@1 ND@1 ND@1 ND@3 ND 71.4 ND@10 ND@1 ND@100 NA


6/14/16 ND@1 ND@1 ND@1 ND@3 ND 1,330 290 33.8 1,240 NA7/14/16 ND@1 ND@1 ND@1 ND@3 ND 6.70 ND@10 ND@1 ND@100 NA8/1/16 ND@1 ND@1 ND@1 ND@3 ND 35.5 ND@10 ND@1 ND@100 NA

8/16/16 ND@1 ND@1 ND@1 ND@3 ND 2.49 ND@10 ND@1 ND@100 NA9/3/16 ND@1 ND@1 ND@1 ND@3 ND 189 ND@10 3.29 129 NA

9/16/16 ND@1 ND@1 ND@1 ND@3 ND 17 ND@10 3.29 ND@100 NA10/4/16 ND@1 ND@1 ND@1 ND@3 ND ND@1 ND@10 ND@1 ND@100 NA10/17/16 ND@1 ND@1 ND@1 ND@3 ND 20.4 ND@10 ND@1 ND@100 NA11/1/16 ND@1 ND@1 ND@1 ND@3 ND 1,190 164 32 560 NA11/21/16 ND@1 ND@1 ND@1 ND@3 ND 7.43 ND@10 ND@1 ND@100 NA12/16/16 ND@1 ND@1 ND@1 ND@3 ND 733 49.5 17.2 627 NA12/31/16 ND@1 ND@1 ND@1 ND@3 ND 106 ND@10 1.62 112 NA1/11/17 ND@1 ND@1 ND@1 ND@3 ND 21.7 ND@10 ND@1 ND@100 NA1/27/17 ND@1 ND@1 ND@1 ND@3 ND 6.8 ND@10 ND@1 ND@100 NA2/10/17 ND@1 ND@1 ND@1 ND@3 ND 5.4 ND@10 ND@1 ND@100 NA3/28/17 ND@1 ND@1 ND@1 ND@3 ND 3.8 ND@10 ND@1 ND@100 NA3/16/17 ND@1 ND@1 ND@1 ND@3 ND 3.6 ND@10 ND@1 ND@100 NA3/29/17 ND@1 ND@1 ND@1 ND@3 ND ND@1 ND@10 ND@1 ND@100 NA

Page 10 of 14


Hampstead, Maryland


Toluene(µg/L)

Ethyl-benzene

(µg/L)

Xylenes(µg/L)

BTEX(µg/L)

MTBE(µg/L)

TBA(µg/L)

TAME(µg/L)

TPH-GRO(µg/L)

TPH-DRO(mg/L)

MW-9 4/7/17 ND@1 ND@1 ND@1 ND@3 ND 17.9 ND@10 ND@1 ND@100 NAContinued 4/24/17 ND@1 ND@1 ND@1 ND@3 ND ND@1 ND@10 ND@1 ND@100 NA

5/2/17 ND@1 ND@1 ND@1 ND@3 ND 19.1 ND@10 ND@1 ND@100 NA5/24/17 ND@1 ND@1 ND@1 ND@3 ND ND@1 ND@10 ND@1 ND@100 NA6/5/17 ND@1 ND@1 ND@1 ND@3 ND ND@1 ND@10 ND@1 ND@100 NA

6/28/17 ND@1 ND@1 ND@1 ND@3 ND 4.74 ND@10 ND@1 ND@100 NA7/24/17 ND@1 ND@1 ND@1 ND@3 ND 26.5 NA NA ND@100 NA8/24/17 ND@1 ND@1 ND@1 ND@3 ND 203 ND@10 4.44 250 NA9/20/17 ND@1 ND@1 ND@1 ND@3 ND 266 11.6 5.01 356 NA10/13/17 ND@1 ND@1 ND@1 ND@3 ND 99.3 NA NA 128 NA10/23/17 ND@1 ND@1 ND@1 ND@3 ND 8.09 NA NA ND@100 NA11/8/17 ND@1 ND@1 ND@1 ND@3 ND 9.38 NA NA ND@100 NA11/27/17 ND@1 ND@1 ND@1 ND@3 ND 119 NA NA 147 NA12/8/17 ND@1 ND@1 ND@1 ND@3 ND 18.7 ND@10 ND@1 ND@100 NA12/26/17 ND@1 ND@1 ND@1 ND@3 ND 10.2 NA NA ND@100 NA

1/9/18 ND@1 ND@1 ND@1 ND@3 ND 165 NA NA 150 NA1/25/18 ND@1 ND@1 ND@1 ND@3 ND 125 NA NA 103 NA2/6/18 ND@1 ND@1 ND@1 ND@3 ND 40.4 NA NA ND@100 NA

2/19/18 ND@1 ND@1 ND@1 ND@3 ND 72.8 NA NA ND@100 NA3/12/18 ND@1 ND@1 ND@1 ND@3 ND 51.7 NA NA ND@100 NA3/26/18 ND@1 ND@1 ND@1 ND@3 ND 75.4 ND@10 1.14 ND@100 NA4/17/18 ND@1 ND@1 ND@1 ND@3 ND 83 NA NA ND@100 NA4/30/18 ND@1 ND@1 ND@1 ND@3 ND 47.1 NA NA ND@100 NA5/17/18 ND@1 ND@1 ND@1 ND@3 ND 17.5 NA NA ND@100 NA6/29/18 ND@1 ND@1 ND@1 ND@3 ND 26.9 ND@10 ND@1 ND@100 NA7/17/18 ND@1 ND@1 ND@1 ND@3 ND 43.8 NA NA ND@100 NA9/11/18 ND@1 ND@1 ND@1 ND@3 ND 5.92 ND@10 ND@1 ND@100 NA10/19/18 ND@1 ND@1 ND@1 ND@3 ND 5.39 ND@10 ND@1 ND@100 NA11/20/18 ND@1 ND@1 ND@1 ND@3 ND 17.6 ND@10 ND@1 ND@100 NA12/6/18 ND@1 ND@1 ND@1 ND@3 ND 40.7 ND@10 1.02 ND@100 NA3/7/19 ND@1 ND@1 ND@1 ND@3 ND 3.11 ND@10 ND@1 ND@100 NA

Page 11 of 14


Hampstead, Maryland


Toluene(µg/L)

Ethyl-benzene

(µg/L)

Xylenes(µg/L)

BTEX(µg/L)

MTBE(µg/L)

TBA(µg/L)

TAME(µg/L)

TPH-GRO(µg/L)

TPH-DRO(mg/L)

MW-10 6/11/10 ND@1 ND@1 ND@1 ND@3 ND ND@1 ND@20 ND@10 ND@100 NA8/17/10 10 3 ND@1 ND@3 13 ND@1 ND@20 ND@10 ND@100 NA11/28/10 12 2 ND@1 ND@3 14 ND@1 ND@20 ND@10 ND@100 NA

2/2/11 ND@1 ND@1 ND@1 ND@3 ND ND@1 ND@20 ND@10 ND@100 NA6/28/11 ND@1 ND@1 ND@1 ND@3 ND ND@1 ND@20 ND@10 ND@100 NA9/29/11 ND@1 ND@1 ND@1 ND@3 ND 2 ND@20 ND@10 ND@100 NA12/20/11 ND@1 ND@1 ND@1 ND@3 ND 16 ND@20 ND@10 ND@100 NA

3/8/12 ND@1 ND@1 ND@1 ND@3 ND 10 ND@20 ND@10 ND@100 NA6/8/12 ND@1 ND@1 ND@1 ND@3 ND 38 ND@20 ND@10 ND@100 NA

9/19/12 ND@1 ND@1 ND@1 ND@3 ND 170 ND@20 ND@10 190 NA12/21/12 ND@1 ND@1 ND@1 ND@3 ND 97 ND@20 ND@10 ND@100 NA3/29/13 ND@1 ND@1 ND@1 ND@3 ND 230 22 ND@10 290 NA6/5/13 ND@1 ND@1 ND@1 ND@3 ND 88 ND@20 ND@10 ND@100 NA

9/25/13 ND@1 ND@1 ND@1 ND@3 ND 200 ND@20 ND@10 1,200 NA12/16/13 ND@1 ND@1 ND@1 ND@3 ND 2 ND@20 ND@10 ND@100 NA3/11/14 ND@1 ND@1 ND@1 ND@3 ND ND@1 ND@20 ND@10 ND@100 NA6/9/14 ND@1 ND@1 ND@1 ND@3 ND ND@1 ND@20 ND@10 ND@100 NA

9/16/14 ND@1 ND@1 ND@1 ND@3 ND ND@1 ND@20 ND@10 ND@100 NA12/3/14 ND@1 ND@1 ND@1 ND@3 ND ND@1 ND@20 ND@10 ND@100 NA3/16/15 ND@1 ND@1 ND@1 ND@2 ND ND@1 ND@10 ND@1 ND@100 NA6/22/15 ND@1 ND@1 ND@1 ND@3 ND ND@1 ND@10 ND@1 ND@100 NA7/22/15 ND@1 ND@1 ND@1 ND@3 ND ND@1 ND@10 ND@1 ND@100 NA9/23/15 ND@1 ND@1 ND@1 ND@3 ND 1.14 ND@10 ND@1 ND@100 NA12/16/15 ND@1 ND@1 ND@1 ND@3 ND ND@1 ND@10 ND@1 ND@100 NA

2/4/16 ND@1 ND@1 ND@1 ND@3 ND 0.518 J ND@10 ND@1 ND@100 NA2/16/16 ND@1 ND@1 ND@1 ND@3 ND 7.36 ND@10 ND@1 ND@100 NA3/4/16 ND@1 ND@1 ND@1 ND@3 ND ND@1 ND@10 ND@1 ND@100 NA

3/16/16 ND@1 ND@1 ND@1 ND@3 ND 1.62 ND@10 ND@1 ND@100 NA4/4/16 ND@1 ND@1 ND@1 ND@3 ND ND@1 ND@10 ND@1 ND@100 NA

4/20/16 ND@1 ND@1 ND@1 ND@3 ND ND@1 ND@10 ND@1 ND@100 NA5/5/16 ND@1 ND@1 ND@1 ND@3 ND ND@1 16.1 ND@1 ND@100 NA


6/14/16 ND@1 ND@1 ND@1 ND@3 ND ND@1 ND@10 ND@1 ND@100 NA7/14/16 ND@1 ND@1 ND@1 ND@3 ND ND@1 ND@10 ND@1 ND@100 NA8/1/16 ND@1 ND@1 ND@1 ND@3 ND ND@1 ND@10 ND@1 ND@100 NA


9/16/16 ND@1 ND@1 ND@1 ND@3 ND ND@1 ND@10 ND@1 ND@100 NA10/4/16 ND@1 ND@1 ND@1 ND@3 ND ND@1 ND@10 ND@1 ND@100 NA10/17/16 ND@1 ND@1 ND@1 ND@3 ND ND@1 ND@10 ND@1 ND@100 NA11/1/16 ND@1 ND@1 ND@1 ND@3 ND ND@1 ND@10 ND@1 ND@100 NA11/21/16 ND@1 ND@1 ND@1 ND@3 ND ND@1 ND@10 ND@1 ND@100 NA12/16/16 ND@1 ND@1 ND@1 ND@3 ND ND@1 ND@10 ND@1 ND@100 NA12/31/16 ND@1 ND@1 ND@1 ND@3 ND ND@1 ND@10 ND@1 ND@100 NA1/11/17 ND@1 ND@1 ND@1 ND@3 ND ND@1 ND@10 ND@1 ND@100 NA1/27/17 ND@1 ND@1 ND@1 ND@3 ND ND@1 ND@10 ND@1 ND@100 NA2/10/17 ND@1 ND@1 ND@1 ND@3 ND ND@1 ND@10 ND@1 ND@100 NA2/28/17 ND@1 ND@1 ND@1 ND@3 ND ND@1 ND@10 ND@1 ND@100 NA3/16/17 ND@1 ND@1 ND@1 ND@3 ND ND@1 ND@10 ND@1 ND@100 NA3/29/17 ND@1 ND@1 ND@1 ND@3 ND ND@1 ND@10 ND@1 ND@100 NA

Page 12 of 14


Hampstead, Maryland


Toluene(µg/L)

Ethyl-benzene

(µg/L)

Xylenes(µg/L)

BTEX(µg/L)

MTBE(µg/L)

TBA(µg/L)

TAME(µg/L)

TPH-GRO(µg/L)

TPH-DRO(mg/L)

MW-10 4/7/17 ND@1 ND@1 ND@1 ND@3 ND ND@1 ND@10 ND@1 ND@100 NAContinued 4/24/17 ND@1 ND@1 ND@1 ND@3 ND ND@1 ND@10 ND@1 ND@100 NA


6/28/17 ND@1 ND@1 ND@1 ND@3 ND ND@1 ND@10 ND@1 ND@100 NA7/24/17 ND@1 ND@1 ND@1 ND@3 ND ND@1 NA NA ND@100 NA8/24/17 ND@1 ND@1 ND@1 ND@3 ND ND@1 NA NA ND@100 NA9/20/17 ND@1 ND@1 ND@1 ND@3 ND ND@1 NA NA ND@100 NA10/13/17 ND@1 ND@1 ND@1 ND@3 ND ND@1 NA NA ND@100 NA10/23/17 ND@1 ND@1 ND@1 ND@3 ND ND@1 NA NA ND@100 NA11/8/17 ND@1 ND@1 ND@1 ND@3 ND ND@1 NA NA ND@100 NA11/27/17 ND@1 ND@1 ND@1 ND@3 ND ND@1 NA NA ND@100 NA12/8/17 ND@1 ND@1 ND@1 ND@3 ND ND@1 ND@10 ND@1 ND@100 NA12/26/17 ND@1 ND@1 ND@1 ND@3 ND ND@1 NA NA ND@100 NA

1/9/18 ND@1 ND@1 ND@1 ND@3 ND ND@1 NA NA ND@100 NA1/25/18 ND@1 ND@1 ND@1 ND@3 ND ND@1 NA NA ND@100 NA2/6/18 ND@1 ND@1 ND@1 ND@3 ND ND@1 NA NA ND@100 NA

2/19/18 ND@1 ND@1 ND@1 ND@3 ND ND@1 NA NA ND@100 NA3/12/18 ND@1 ND@1 ND@1 ND@3 ND ND@1 NA NA ND@100 NA3/26/18 ND@1 ND@1 ND@1 ND@3 ND ND@1 ND@10 ND@1 ND@100 NA4/17/18 ND@1 ND@1 ND@1 ND@3 ND ND@1 NA NA ND@100 NA4/30/18 ND@1 ND@1 ND@1 ND@3 ND ND@1 NA NA ND@100 NA5/17/18 ND@1 ND@1 ND@1 ND@3 ND ND@1 NA NA ND@100 NA6/29/18 ND@1 ND@1 ND@1 ND@3 ND ND@1 ND@10 ND@1 ND@100 NA7/17/18 ND@1 ND@1 ND@1 ND@3 ND ND@1 NA NA ND@100 NA9/11/18 ND@1 ND@1 ND@1 ND@3 ND ND@1 ND@10 ND@1 ND@100 NA10/19/18 ND@1 ND@1 ND@1 ND@3 ND ND@1 ND@10 ND@1 ND@100 NA11/20/18 ND@1 ND@1 ND@1 ND@3 ND ND@1 ND@10 ND@1 ND@100 NA12/6/18 ND@1 ND@1 ND@1 ND@3 ND ND@1 ND@10 ND@1 ND@100 NA3/7/19 ND@1 ND@1 ND@1 ND@3 ND ND@1 ND@10 ND@1 ND@100 NA

Page 13 of 14


Hampstead, Maryland


Toluene(µg/L)

Ethyl-benzene

(µg/L)

Xylenes(µg/L)

BTEX(µg/L)

MTBE(µg/L)

TBA(µg/L)

TAME(µg/L)

TPH-GRO(µg/L)

TPH-DRO(mg/L)

INJ-1 11/4/09 ND@1 ND@1 ND@1 ND@3 ND 23,000 3,600 290 44,000 NA2/26/10 NS NS NS NS NS NS NS NS NS NS

INJ-2 11/4/09 ND@1 ND@1 ND@1 ND@3 ND 8,900 ND@20 140 17,000 NA2/26/10 ND@1 ND@1 ND@1 ND@3 ND 26,000 5,200 170 29,000 NA

INJ-3 11/4/09 ND@1 ND@1 ND@1 ND@3 ND 660 ND@20 25 880 NA2/26/10 ND@1 ND@1 ND@1 ND@3 ND 330 88 ND@10 330 NA

INJ-4 11/4/09 ND@1 ND@1 ND@1 ND@3 ND 360 ND@20 ND@10 480 NA2/26/10 ND@1 ND@1 ND@1 ND@3 ND 110 24 ND@10 110 NA

7/1/05 [email protected] [email protected] [email protected] [email protected] ND [email protected] ND@5 ND@5 NA NA1/25/06 [email protected] [email protected] [email protected] [email protected] ND [email protected] ND@5 ND@5 NA NA7/11/06 [email protected] [email protected] [email protected] [email protected] ND [email protected] ND@5 ND@5 NA NA1/9/07 [email protected] [email protected] [email protected] [email protected] ND [email protected] ND@10 ND@10 NA NA

6/14/07 [email protected] [email protected] [email protected] [email protected] ND [email protected] [email protected] [email protected] ND@100 [email protected]/30/07 [email protected] [email protected] [email protected] [email protected] ND [email protected] [email protected] [email protected] NA NA5/23/08 [email protected] [email protected] [email protected] [email protected] ND [email protected] [email protected] [email protected] ND@100 [email protected]/7/08 [email protected] [email protected] [email protected] [email protected] ND [email protected] ND@20 ND@5 NA NA

12/3/08 [email protected] [email protected] [email protected] [email protected] ND [email protected] ND@20 ND@5 NA NA5/12/09 [email protected] [email protected] [email protected] [email protected] ND [email protected] ND@20 ND@5 NA NA3/4/10 [email protected] [email protected] [email protected] [email protected] ND [email protected] ND@20 ND@5 NA NA

8/17/10 [email protected] [email protected] [email protected] [email protected] ND 0.8 ND@20 ND@5 NA NA1/4/11 [email protected] [email protected] [email protected] [email protected] ND 1.6 ND@20 ND@5 NA NA

1/25/11 [email protected] [email protected] [email protected] [email protected] ND 2 ND@20 ND@5 NA NA6/28/11 [email protected] [email protected] [email protected] [email protected] ND 1.6 ND@20 ND@5 NA NA2/17/12 [email protected] [email protected] [email protected] [email protected] ND [email protected] ND@20 ND@5 NA NA6/26/12 [email protected] [email protected] [email protected] [email protected] ND 1.7 ND@10 [email protected] NA NA9/19/12 [email protected] [email protected] [email protected] [email protected] ND [email protected] ND@20 ND@5 NA NA9/25/13 [email protected] [email protected] [email protected] [email protected] ND [email protected] ND@20 ND@5 NA NA3/11/14 [email protected] [email protected] [email protected] [email protected] ND [email protected] ND@20 ND@5 NA NA6/9/14

9/16/14 [email protected] [email protected] [email protected] [email protected] ND [email protected] ND@20 ND@5 NA NA10/7/15 [email protected] [email protected] [email protected] [email protected] ND [email protected] ND@20 ND@5 NA NA9/27/16 [email protected] [email protected] [email protected] [email protected] ND [email protected] ND@20 ND@5 NA NA9/20/17 [email protected] [email protected] [email protected] [email protected] ND 1.02 ND@20 ND@5 NA NA9/18/18 [email protected] [email protected] [email protected] [email protected] ND [email protected] ND@20 ND@5 NA NA10/19/18 [email protected] [email protected] [email protected] [email protected] ND [email protected] ND@20 ND@5 NA NA12/6/18 [email protected] [email protected] [email protected] [email protected] ND [email protected] ND@20 ND@5 NA NA3/7/19 [email protected] [email protected] [email protected] [email protected] ND [email protected] ND@20 ND@5 NA NA

MDE CLEANUP STD 5 1,000 700 10,000 -- 20 -- -- 47 47

ND@x - not detected above laboratory detection level of xND - not detected

TBA - Tert-Butyl Alcohol NI - not installedTAME - Tert-Amyl Methyl Ether NA - not analyzedµg/L - micrograms-per-liter NS - inaccessibleBold - indicates level above the MDE Cleanup Standard E - estimated result; exceeds calibration range

7-11 PotableWell

NOT SAMPLED - MDE APPROVED CHANGE TO ANNUAL

BTEX - Total Benzene, Toluene, Ethylbenzene and XylenesMTBE - Methyl Tert-Butyl Ether

Page 14 of 14

Table 3: 124 Hanover Pike Sampling Results7-Eleven Store No. 32785

Hampstead, Maryland


Toluene(µg/L)

Ethyl-benzene

(µg/L)

Xylenes(µg/L)

BTEX(µg/L)

MTBE(µg/L)

TBA(µg/L)

TAME(µg/L)

TPH-GRO(µg/L)

DiisopropylEther

4/1/10 [email protected] [email protected] [email protected] [email protected] BDL 3,100 480 73 2,100 164/15/10 [email protected] [email protected] [email protected] [email protected] BDL 2,500 300 E 60 2,000 136/1/10 [email protected] [email protected] [email protected] [email protected] BDL 1,600 340 46 1,600 126/8/10 [email protected] [email protected] [email protected] [email protected] BDL 1,500 380 66 1,400 13

6/17/10 [email protected] [email protected] [email protected] [email protected] BDL 920 41 21 840 96/22/10 ND@5 ND@5 ND@5 ND@15 BDL 1,500 ND@200 ND@50 NA ND@506/29/10 ND@5 ND@5 ND@5 ND@15 BDL 900 88 19 NA 87/6/10 ND@5 ND@5 ND@5 ND@15 BDL 860 97 23 NA 10

7/13/10 ND@5 ND@5 ND@5 ND@15 BDL 750 190 24 NA 87/20/10 ND@5 ND@5 ND@5 ND@15 BDL 770 130 21 NA 77/27/10 ND@5 ND@5 ND@5 ND@15 BDL 1,300 280 33 NA 117/27/10 ND@5 ND@5 ND@5 ND@15 BDL 1,300 280 33 NA 118/10/10 ND@5 ND@5 ND@5 ND@15 BDL 480 ND@200 ND@50 NA ND@508/24/10 ND@5 ND@5 ND@5 ND@15 BDL 1,700 230 42 NA 108/27/10 -- -- -- -- -- -- -- -- -- --9/9/10 ND@5 ND@5 ND@5 ND@15 BDL 820 79 24 NA 8

9/21/10 ND@5 ND@5 ND@5 ND@15 BDL 750 52 15 NA 810/5/10 ND@5 ND@5 ND@5 ND@15 BDL 590 ND@50 6 NA 9

10/18/10 ND@5 ND@5 ND@5 ND@15 BDL 1,400 65 34 NA 1111/2/10 ND@5 ND@5 ND@5 ND@15 BDL 1,700 230 43 NA 12

11/16/10 ND@5 ND@5 ND@5 ND@15 BDL 1,200 180 32 NA 1011/30/10 ND@5 ND@5 ND@5 ND@15 BDL 1,800 310 50 NA 1312/14/10 ND@5 ND@5 ND@5 ND@15 BDL 1,500 220 42 NA 1312/28/10 ND@5 ND@5 ND@5 ND@15 BDL 1,600 330 46 NA 131/11/11 ND@5 ND@5 ND@5 ND@15 BDL 820 530 41 NA 131/25/11 ND@5 ND@5 ND@5 ND@15 BDL 1,700 ND@400 ND@100 NA ND@1002/8/11 ND@5 ND@5 ND@5 ND@15 BDL 1,700 190 45 NA 133/1/11 ND@5 ND@5 ND@5 ND@15 BDL 1,300 78 36 NA 13

3/15/11 ND@5 ND@5 ND@5 ND@15 BDL 980 53 24 NA 104/12/11 ND@5 ND@5 ND@5 ND@15 BDL 1,400 120 39 NA 125/11/11 ND@5 ND@5 ND@5 ND@15 BDL 1,900 180 46 NA 136/14/11 ND@5 ND@5 ND@5 ND@15 BDL 1,700 120 42 NA 147/12/11 ND@5 ND@5 ND@5 ND@15 BDL 1,200 ND@20 25 NA 118/16/11 ND@5 ND@5 ND@5 ND@15 BDL 870 ND@20 18 NA 89/12/11 ND@5 ND@5 ND@5 ND@15 BDL 1,400 68 33 NA 13

10/14/11 [email protected] [email protected] [email protected] [email protected] BDL 1,700 130 47 NA 1411/8/11 [email protected] [email protected] [email protected] [email protected] BDL 2,000 150 47 NA 14

12/20/11 [email protected] [email protected] [email protected] [email protected] BDL 1,500 90 39 NA 121/18/12 [email protected] [email protected] [email protected] [email protected] BDL 1,200 100 32 NA 122/21/12 [email protected] [email protected] [email protected] [email protected] BDL 1,100 65 27 NA 103/8/12 [email protected] [email protected] [email protected] [email protected] BDL 1,100 53 25 NA 9.8

124 HanoverPike - Influent


Hampstead, Maryland


Toluene(µg/L)

Ethyl-benzene

(µg/L)

Xylenes(µg/L)

BTEX(µg/L)

MTBE(µg/L)

TBA(µg/L)

TAME(µg/L)

TPH-GRO(µg/L)

DiisopropylEther

124 Hanover 4/20/12 [email protected] [email protected] [email protected] [email protected] BDL 1,200 88 28 NA 105/22/12 [email protected] [email protected] [email protected] [email protected] BDL 670 ND@20 13 NA 8.26/26/12 ND@25 ND@25 ND@25 ND@25 BDL 1,400 ND@25 31 NA ND@257/17/12 [email protected] [email protected] [email protected] [email protected] BDL 1,000 67 23 NA 9.88/21/12 [email protected] [email protected] [email protected] [email protected] BDL 290 ND@20 ND@5 NA 5.79/19/12 [email protected] [email protected] [email protected] [email protected] BDL 1,100 67 22 NA 9.7

10/25/12 [email protected] [email protected] [email protected] [email protected] BDL 730 23 12 NA 8.712/21/12 [email protected] [email protected] [email protected] [email protected] BDL 460 ND@20 1/8/00 NA 1/7/001/22/13 [email protected] [email protected] [email protected] [email protected] BDL 450 ND@20 ND@5 NA ND@52/26/13 [email protected] [email protected] [email protected] [email protected] BDL 330 ND@20 ND@5 NA ND@54/17/13 [email protected] [email protected] [email protected] [email protected] BDL 260 ND@20 ND@5 NA 66/28/13 [email protected] [email protected] [email protected] [email protected] BDL 170 ND@20 ND@5 NA 68/30/13 [email protected] [email protected] [email protected] [email protected] BDL 130 ND@20 ND@5 NA 6

10/28/13 [email protected] [email protected] [email protected] [email protected] BDL 220 22 ND@5 NA 712/16/13 [email protected] [email protected] [email protected] [email protected] BDL 56 ND@20 ND@5 NA 61/13/14 [email protected] [email protected] [email protected] [email protected] BDL 7.2 ND@20 ND@5 NA ND@52/18/14 [email protected] [email protected] [email protected] [email protected] BDL 32 ND@20 ND@5 NA ND@55/3/14 [email protected] [email protected] [email protected] [email protected] BDL 6.2 ND@20 ND@5 NA ND@5

6/24/14 [email protected] [email protected] [email protected] [email protected] BDL 0.54 ND@20 ND@5 NA ND@59/16/14 [email protected] [email protected] [email protected] [email protected] BDL [email protected] ND@20 ND@5 NA ND@5

10/31/14 [email protected] [email protected] [email protected] [email protected] BDL [email protected] ND@20 ND@5 NA ND@51/9/15 [email protected] [email protected] [email protected] [email protected] BDL [email protected] ND@20 ND@5 ND@100 ND@5

2/16/15 [email protected] [email protected] [email protected] [email protected] BDL [email protected] ND@20 ND@5 ND@100 ND@54/24/15 [email protected] [email protected] [email protected] [email protected] BDL [email protected] ND@20 ND@5 ND@100 ND@56/22/15 [email protected] [email protected] [email protected] [email protected] BDL [email protected] ND@20 ND@5 ND@100 ND@57/22/15 [email protected] [email protected] [email protected] [email protected] BDL [email protected] ND@20 ND@5 ND@100 ND@58/28/15 [email protected] [email protected] [email protected] [email protected] BDL [email protected] ND@20 ND@5 NA ND9/25/15 [email protected] [email protected] [email protected] [email protected] BDL [email protected] ND@20 ND@5 NA 0.567

11/10/15 [email protected] [email protected] [email protected] [email protected] BDL [email protected] ND@10 [email protected] NA [email protected]/27/16 [email protected] [email protected] [email protected] [email protected] BDL [email protected] ND@10 [email protected] NA [email protected]/16/16 [email protected] [email protected] [email protected] [email protected] BDL [email protected] ND@10 [email protected] NA [email protected]/30/16 [email protected] [email protected] [email protected] [email protected] BDL [email protected] ND@10 [email protected] NA [email protected]/13/16 [email protected] [email protected] [email protected] [email protected] BDL [email protected] ND@10 [email protected] NA [email protected]/27/16 [email protected] [email protected] [email protected] [email protected] BDL [email protected] ND@10 [email protected] NA [email protected]

11/11/16 [email protected] [email protected] [email protected] [email protected] BDL [email protected] ND@10 [email protected] NA [email protected]/31/17 [email protected] [email protected] [email protected] [email protected] BDL [email protected] ND@10 [email protected] NA [email protected]/31/17 [email protected] [email protected] [email protected] [email protected] BDL [email protected] ND@10 [email protected] NA [email protected]/19/17 [email protected] [email protected] [email protected] [email protected] BDL [email protected] ND@10 [email protected] NA [email protected]/11/17 [email protected] [email protected] [email protected] [email protected] BDL [email protected] ND@10 [email protected] NA [email protected]/13/17 [email protected] [email protected] [email protected] [email protected] BDL [email protected] ND@10 [email protected] NA [email protected]/7/17 [email protected] [email protected] [email protected] [email protected] BDL [email protected] ND@10 [email protected] NA [email protected]/30/18 [email protected] [email protected] [email protected] [email protected] BDL [email protected] ND@10 [email protected] NA [email protected]/26/18 [email protected] [email protected] [email protected] [email protected] BDL [email protected] ND@10 [email protected] NA [email protected]/30/18 [email protected] [email protected] [email protected] [email protected] BDL [email protected] ND@10 [email protected] NA [email protected]/17/18 [email protected] [email protected] [email protected] [email protected] BDL [email protected] ND@10 [email protected] NA [email protected]/11/18 [email protected] [email protected] [email protected] [email protected] BDL [email protected] ND@10 [email protected] NA [email protected]

10/19/18 [email protected] [email protected] [email protected] [email protected] BDL [email protected] ND@10 [email protected] NA [email protected]/20/18 [email protected] [email protected] [email protected] [email protected] BDL [email protected] ND@10 [email protected] NA [email protected]/31/19 [email protected] [email protected] [email protected] [email protected] BDL [email protected] ND@10 [email protected] NA [email protected]/7/19 [email protected] [email protected] [email protected] [email protected] BDL [email protected] ND@10 [email protected] NA [email protected]


Hampstead, Maryland


Toluene(µg/L)

Ethyl-benzene

(µg/L)

Xylenes(µg/L)

BTEX(µg/L)

MTBE(µg/L)

TBA(µg/L)

TAME(µg/L)

TPH-GRO(µg/L)

DiisopropylEther

124 HanoverGAC - 1 6/1/10 [email protected] [email protected] [email protected] [email protected] BDL [email protected] ND@20 ND@5 ND@100 ND@56/8/10 [email protected] [email protected] [email protected] [email protected] BDL [email protected] ND@20 ND@5 ND@100 ND@5

6/17/10 [email protected] [email protected] [email protected] [email protected] BDL [email protected] ND@20 ND@5 ND@100 ND@56/22/10 [email protected] [email protected] [email protected] [email protected] BDL [email protected] ND@20 ND@5 ND@100 ND@56/29/10 [email protected] [email protected] [email protected] [email protected] BDL [email protected] ND@20 ND@5 ND@100 ND@57/6/10 [email protected] [email protected] [email protected] [email protected] BDL [email protected] 47 ND@5 ND@100 ND@5

7/13/10 [email protected] [email protected] [email protected] [email protected] BDL [email protected] 31 ND@5 ND@100 ND@57/20/10 [email protected] [email protected] [email protected] [email protected] BDL [email protected] 22 ND@5 ND@100 ND@57/27/10 [email protected] [email protected] [email protected] [email protected] BDL [email protected] ND@20 ND@5 ND@100 ND@58/10/10 [email protected] [email protected] [email protected] [email protected] BDL [email protected] ND@20 ND@5 ND@100 ND@58/24/10 [email protected] [email protected] [email protected] [email protected] BDL [email protected] ND@20 ND@5 ND@100 ND@59/9/10 [email protected] [email protected] [email protected] [email protected] BDL 2.1 ND@20 ND@5 ND@100 ND@5

9/21/10 [email protected] [email protected] [email protected] [email protected] BDL [email protected] ND@20 ND@5 ND@100 ND@510/5/10 [email protected] [email protected] [email protected] [email protected] BDL [email protected] ND@20 ND@5 ND@100 ND@5


11/16/10 [email protected] [email protected] [email protected] [email protected] BDL [email protected] ND@20 ND@5 ND@100 ND@511/30/10 [email protected] [email protected] [email protected] [email protected] BDL [email protected] ND@20 ND@5 ND@100 ND@512/14/10 [email protected] [email protected] [email protected] [email protected] BDL [email protected] ND@20 ND@5 ND@100 ND@512/28/10 [email protected] [email protected] [email protected] [email protected] BDL [email protected] ND@20 ND@5 ND@100 ND@51/11/11 [email protected] [email protected] [email protected] [email protected] BDL [email protected] 33 ND@5 ND@100 ND@51/25/11 [email protected] [email protected] [email protected] [email protected] BDL [email protected] 62 ND@5 ND@100 ND@52/8/11 [email protected] [email protected] [email protected] [email protected] BDL [email protected] 61 ND@5 ND@100 ND@53/1/11 [email protected] [email protected] [email protected] [email protected] BDL [email protected] ND@20 ND@5 ND@100 ND@5

3/15/11 [email protected] [email protected] [email protected] [email protected] BDL [email protected] ND@20 ND@5 ND@100 ND@54/12/11 [email protected] [email protected] [email protected] [email protected] BDL [email protected] ND@20 ND@5 ND@100 ND@55/11/11 [email protected] [email protected] [email protected] [email protected] BDL [email protected] 48 ND@5 ND@100 ND@56/14/11 [email protected] [email protected] [email protected] [email protected] BDL [email protected] 170 ND@5 ND@100 ND@57/12/11 [email protected] [email protected] [email protected] [email protected] BDL [email protected] ND@20 ND@5 ND@100 ND@58/16/11 [email protected] [email protected] [email protected] [email protected] BDL [email protected] ND@20 ND@5 ND@100 ND@59/12/11 [email protected] [email protected] [email protected] [email protected] BDL [email protected] 25 ND@5 ND@100 ND@5

10/14/11 [email protected] [email protected] [email protected] [email protected] BDL [email protected] 41 ND@5 ND@100 ND@511/8/11 [email protected] [email protected] [email protected] [email protected] BDL [email protected] ND@20 ND@5 ND@100 ND@5

12/20/11 [email protected] [email protected] [email protected] [email protected] BDL [email protected] 37 ND@5 ND@100 ND@51/18/12 [email protected] [email protected] [email protected] [email protected] BDL [email protected] 84 ND@5 ND@100 ND@52/21/12 [email protected] [email protected] [email protected] [email protected] BDL [email protected] 96 ND@5 ND@100 ND@53/8/12 [email protected] [email protected] [email protected] [email protected] BDL [email protected] ND@20 ND@5 ND@100 ND@5


Hampstead, Maryland


Toluene(µg/L)

Ethyl-benzene

(µg/L)

Xylenes(µg/L)

BTEX(µg/L)

MTBE(µg/L)

TBA(µg/L)

TAME(µg/L)

TPH-GRO(µg/L)

DiisopropylEther

124 Hanover 4/20/12 [email protected] [email protected] [email protected] BDL [email protected] [email protected] ND@20 ND@5 ND@100 ND@55/22/12 [email protected] [email protected] [email protected] [email protected] BDL [email protected] ND@20 ND@5 ND@100 ND@56/26/12 [email protected] [email protected] [email protected] [email protected] BDL [email protected] 120 [email protected] ND@100 ND@57/17/12 [email protected] [email protected] [email protected] [email protected] BDL [email protected] ND@20 ND@5 ND@100 ND@58/21/12 [email protected] [email protected] [email protected] [email protected] BDL [email protected] ND@20 ND@5 ND@100 ND@59/19/12 [email protected] [email protected] [email protected] [email protected] BDL [email protected] ND@20 ND@5 ND@100 ND@5

10/25/12 [email protected] [email protected] [email protected] [email protected] BDL [email protected] ND@20 ND@5 ND@100 ND@512/21/12 [email protected] [email protected] [email protected] [email protected] BDL [email protected] ND@20 ND@5 ND@100 ND@51/22/13 [email protected] [email protected] [email protected] [email protected] BDL [email protected] ND@20 ND@5 ND@100 ND@52/26/13 [email protected] [email protected] [email protected] [email protected] BDL [email protected] ND@20 ND@5 ND@100 ND@54/17/13 [email protected] [email protected] [email protected] [email protected] BDL [email protected] ND@20 ND@5 ND@100 ND@56/28/13 [email protected] [email protected] [email protected] [email protected] BDL [email protected] ND@20 ND@5 ND@100 ND@58/30/13 [email protected] [email protected] [email protected] [email protected] BDL [email protected] ND@20 ND@5 ND@100 ND@5

10/28/13 [email protected] [email protected] [email protected] [email protected] BDL [email protected] ND@20 ND@5 ND@100 ND@512/16/13 [email protected] [email protected] [email protected] [email protected] BDL 1.7 ND@20 ND@5 ND@100 ND@51/13/14 [email protected] [email protected] [email protected] [email protected] BDL 1.4 ND@20 ND@5 ND@100 ND@52/18/14 [email protected] [email protected] [email protected] [email protected] BDL 4.3 ND@20 ND@5 ND@100 ND@55/3/14 [email protected] [email protected] [email protected] [email protected] BDL 1.5 ND@20 ND@5 ND@100 ND@5

6/24/14 [email protected] [email protected] [email protected] [email protected] BDL 0.77 ND@20 ND@5 ND@100 ND@59/16/14 [email protected] [email protected] [email protected] [email protected] BDL [email protected] ND@20 ND@5 ND@100 ND@5


2/16/15 [email protected] [email protected] [email protected] [email protected] BDL [email protected] ND@20 ND@5 ND@100 ND@54/24/15 [email protected] [email protected] [email protected] [email protected] BDL [email protected] ND@20 ND@5 ND@100 ND@56/22/15 [email protected] [email protected] [email protected] [email protected] BDL [email protected] ND@20 ND@5 ND@100 ND@57/22/15 [email protected] [email protected] [email protected] [email protected] BDL [email protected] ND@20 ND@5 ND@100 ND@58/28/15 [email protected] [email protected] [email protected] [email protected] BDL [email protected] ND@20 ND@5 NA ND@59/25/15 [email protected] [email protected] [email protected] [email protected] BDL [email protected] ND@20 ND@5 NA ND@5

11/10/15 [email protected] [email protected] [email protected] [email protected] BDL [email protected] ND@20 ND@5 NA ND@51/27/16 [email protected] [email protected] [email protected] [email protected] BDL [email protected] ND@20 ND@5 NA ND@53/16/16 [email protected] [email protected] [email protected] [email protected] BDL [email protected] ND@20 ND@5 NA ND@55/30/16 [email protected] [email protected] [email protected] [email protected] BDL [email protected] ND@20 ND@5 NA ND@57/13/16 [email protected] [email protected] [email protected] [email protected] BDL 0.547 ND@20 ND@5 NA ND@59/27/16 [email protected] [email protected] [email protected] [email protected] BDL 0.608 ND@20 ND@5 NA ND@5

11/11/16 [email protected] [email protected] [email protected] [email protected] BDL 0.537 ND@20 ND@5 NA ND@51/31/17 [email protected] [email protected] [email protected] [email protected] BDL 0.583 ND@20 ND@5 NA ND@53/31/17 [email protected] [email protected] [email protected] [email protected] BDL 0.726 ND@20 ND@5 NA ND@55/19/17 [email protected] [email protected] [email protected] [email protected] BDL 0.910 ND@20 ND@5 NA ND@58/11/17 [email protected] [email protected] [email protected] [email protected] BDL 1.15 ND@20 ND@5 NA ND@59/13/17 [email protected] [email protected] [email protected] [email protected] BDL 1.45 ND@20 ND@5 NA ND@511/7/17 [email protected] [email protected] [email protected] [email protected] BDL 1.35 ND@20 ND@5 NA ND@51/30/18 [email protected] [email protected] [email protected] [email protected] BDL 1.09 ND@20 ND@5 NA ND@53/26/18 [email protected] [email protected] [email protected] [email protected] BDL 0.91 ND@20 ND@5 NA ND@55/30/18 [email protected] [email protected] [email protected] [email protected] BDL 1.43 ND@20 ND@5 NA ND@57/17/18 [email protected] [email protected] [email protected] [email protected] BDL 1.56 ND@20 ND@5 NA ND@59/11/18 [email protected] [email protected] [email protected] [email protected] BDL 1.34 ND@20 ND@5 NA ND@5

10/19/18 [email protected] [email protected] [email protected] [email protected] BDL 1.26 ND@20 ND@5 NA ND@511/20/18 [email protected] [email protected] [email protected] [email protected] BDL 1.21 ND@20 ND@5 NA ND@51/31/19 [email protected] [email protected] [email protected] [email protected] BDL 1.12 ND@20 ND@5 NA ND@53/7/19 [email protected] [email protected] [email protected] [email protected] BDL 1.22 ND@20 ND@5 NA ND@5


Hampstead, Maryland


Toluene(µg/L)

Ethyl-benzene

(µg/L)

Xylenes(µg/L)

BTEX(µg/L)

MTBE(µg/L)

TBA(µg/L)

TAME(µg/L)

TPH-GRO(µg/L)

DiisopropylEther

124 HanoverGAC - 2 6/1/10 [email protected] [email protected] [email protected] [email protected] BDL [email protected] ND@20 ND@5 ND@100 ND@56/8/10 [email protected] [email protected] [email protected] [email protected] BDL [email protected] ND@20 ND@5 ND@100 ND@5

6/17/10 [email protected] [email protected] [email protected] [email protected] BDL [email protected] ND@20 ND@5 ND@100 ND@56/22/10 [email protected] [email protected] [email protected] [email protected] BDL [email protected] ND@20 ND@5 ND@100 ND@56/29/10 [email protected] [email protected] [email protected] [email protected] BDL [email protected] ND@20 ND@5 ND@100 ND@57/6/10 [email protected] [email protected] [email protected] [email protected] BDL [email protected] ND@20 ND@5 ND@100 ND@5

7/13/10 [email protected] [email protected] [email protected] [email protected] BDL [email protected] ND@20 ND@5 ND@100 ND@57/20/10 [email protected] [email protected] [email protected] [email protected] BDL [email protected] ND@20 ND@5 ND@100 ND@57/27/10 [email protected] [email protected] [email protected] [email protected] BDL [email protected] ND@20 ND@5 ND@100 ND@58/10/10 [email protected] [email protected] [email protected] [email protected] BDL [email protected] ND@20 ND@5 ND@100 ND@58/24/10 [email protected] [email protected] [email protected] [email protected] BDL [email protected] ND@20 ND@5 ND@100 ND@59/9/10 [email protected] [email protected] [email protected] [email protected] BDL [email protected] ND@20 ND@5 ND@100 ND@5



11/16/10 [email protected] [email protected] [email protected] [email protected] BDL [email protected] ND@20 ND@5 ND@100 ND@511/30/10 [email protected] [email protected] [email protected] [email protected] BDL [email protected] ND@20 ND@5 ND@100 ND@512/14/10 [email protected] [email protected] [email protected] [email protected] BDL [email protected] ND@20 ND@5 ND@100 ND@512/28/10 [email protected] [email protected] [email protected] [email protected] BDL [email protected] ND@20 ND@5 ND@100 ND@51/11/11 [email protected] [email protected] [email protected] [email protected] BDL [email protected] ND@20 ND@5 ND@100 ND@51/25/11 [email protected] [email protected] [email protected] [email protected] BDL [email protected] ND@20 ND@5 ND@100 ND@52/8/11 [email protected] [email protected] [email protected] [email protected] BDL [email protected] ND@20 ND@5 ND@100 ND@53/1/11 [email protected] [email protected] [email protected] [email protected] BDL [email protected] ND@20 ND@5 ND@100 ND@5





Hampstead, Maryland


Toluene(µg/L)

Ethyl-benzene

(µg/L)

Xylenes(µg/L)

BTEX(µg/L)

MTBE(µg/L)

TBA(µg/L)

TAME(µg/L)

TPH-GRO(µg/L)

DiisopropylEther

124 Hanover 4/20/12 [email protected] [email protected] [email protected] [email protected] BDL [email protected] ND@20 ND@5 ND@100 ND@55/22/12 [email protected] [email protected] [email protected] [email protected] BDL [email protected] ND@20 ND@5 ND@100 ND@56/26/12 [email protected] [email protected] [email protected] [email protected] BDL [email protected] 34 [email protected] ND@100 ND@57/17/12 [email protected] [email protected] [email protected] [email protected] BDL [email protected] ND@20 ND@5 ND@100 ND@58/21/12 [email protected] [email protected] [email protected] [email protected] BDL [email protected] ND@20 ND@5 ND@100 ND@59/19/12 [email protected] [email protected] [email protected] [email protected] BDL [email protected] ND@20 ND@5 ND@100 ND@5


10/28/13 [email protected] [email protected] [email protected] [email protected] BDL [email protected] ND@20 ND@5 ND@100 ND@512/16/13 [email protected] [email protected] [email protected] [email protected] BDL [email protected] ND@20 ND@5 ND@100 ND@51/13/14 [email protected] [email protected] [email protected] [email protected] BDL [email protected] ND@20 ND@5 ND@100 ND@52/18/14 [email protected] [email protected] [email protected] [email protected] BDL [email protected] ND@20 ND@5 ND@100 ND@55/3/14 [email protected] [email protected] [email protected] [email protected] BDL [email protected] ND@20 ND@5 ND@100 ND@5

6/24/14 [email protected] [email protected] [email protected] [email protected] BDL [email protected] ND@20 ND@5 ND@100 ND@56/24/14 [email protected] [email protected] [email protected] [email protected] BDL [email protected] ND@20 ND@5 ND@100 ND@54/24/15 [email protected] [email protected] [email protected] [email protected] BDL [email protected] ND@20 ND@5 ND@100 ND@56/22/15 [email protected] [email protected] [email protected] [email protected] BDL [email protected] ND@20 ND@5 ND@100 ND@57/22/15 [email protected] [email protected] [email protected] [email protected] BDL [email protected] ND@20 ND@5 ND@100 ND@58/28/15 [email protected] [email protected] [email protected] [email protected] BDL [email protected] ND@20 ND@5 NA ND@59/25/15 [email protected] [email protected] [email protected] [email protected] BDL [email protected] ND@20 ND@5 NA ND@5

11/10/15 [email protected] [email protected] [email protected] [email protected] BDL [email protected] ND@20 ND@5 NA ND@51/27/16 [email protected] [email protected] [email protected] [email protected] BDL [email protected] ND@20 ND@5 NA ND@53/16/16 [email protected] [email protected] [email protected] [email protected] BDL [email protected] ND@20 ND@5 NA ND@55/30/16 [email protected] [email protected] [email protected] [email protected] BDL [email protected] ND@20 ND@5 NA ND@57/13/16 [email protected] [email protected] [email protected] [email protected] BDL [email protected] ND@20 ND@5 NA ND@59/27/16 [email protected] [email protected] [email protected] [email protected] BDL [email protected] ND@20 ND@5 NA ND@5

11/11/16 [email protected] [email protected] [email protected] [email protected] BDL [email protected] ND@20 ND@5 NA ND@51/31/17 [email protected] [email protected] [email protected] [email protected] BDL [email protected] ND@20 ND@5 NA ND@53/31/17 [email protected] [email protected] [email protected] [email protected] BDL [email protected] ND@20 ND@5 NA ND@55/19/17 [email protected] [email protected] [email protected] [email protected] BDL [email protected] ND@20 ND@5 NA ND@58/11/17 [email protected] [email protected] [email protected] [email protected] BDL [email protected] ND@20 ND@5 NA ND@59/13/17 [email protected] [email protected] [email protected] [email protected] BDL [email protected] ND@20 ND@5 NA ND@511/7/17 [email protected] [email protected] [email protected] [email protected] BDL [email protected] ND@20 ND@5 NA ND@51/30/18 [email protected] [email protected] [email protected] [email protected] BDL [email protected] ND@20 ND@5 NA ND@53/26/18 [email protected] [email protected] [email protected] [email protected] BDL [email protected] ND@20 ND@5 NA ND@55/30/18 [email protected] [email protected] [email protected] [email protected] BDL [email protected] ND@20 ND@5 NA ND@57/17/18 [email protected] [email protected] [email protected] [email protected] BDL [email protected] ND@20 ND@5 NA ND@59/11/18 [email protected] [email protected] [email protected] [email protected] BDL [email protected] ND@20 ND@5 NA ND@5

10/19/18 [email protected] [email protected] [email protected] [email protected] BDL [email protected] ND@20 ND@5 NA ND@511/20/18 [email protected] [email protected] [email protected] [email protected] BDL [email protected] ND@20 ND@5 NA ND@51/31/19 [email protected] [email protected] [email protected] [email protected] BDL [email protected] ND@20 ND@5 NA ND@53/7/19 [email protected] [email protected] [email protected] [email protected] BDL [email protected] ND@20 ND@5 NA ND@5


Hampstead, Maryland


Toluene(µg/L)

Ethyl-benzene

(µg/L)

Xylenes(µg/L)

BTEX(µg/L)

MTBE(µg/L)

TBA(µg/L)

TAME(µg/L)

TPH-GRO(µg/L)

DiisopropylEther

124 HanoverFinal Effluent 6/1/10 [email protected] [email protected] [email protected] [email protected] BDL [email protected] ND@20 ND@5 ND@100 ND@56/22/10 [email protected] [email protected] [email protected] [email protected] BDL [email protected] ND@20 ND@5 ND@100 ND@56/29/10 [email protected] [email protected] [email protected] [email protected] BDL [email protected] ND@20 ND@5 ND@100 ND@57/6/10 [email protected] [email protected] [email protected] [email protected] BDL [email protected] ND@20 ND@5 ND@100 ND@5

7/13/10 [email protected] [email protected] [email protected] [email protected] BDL [email protected] ND@20 ND@5 ND@100 ND@57/20/10 [email protected] [email protected] [email protected] [email protected] BDL [email protected] ND@20 ND@5 ND@100 ND@57/27/10 [email protected] [email protected] [email protected] [email protected] BDL [email protected] ND@20 ND@5 ND@100 ND@58/10/10 [email protected] [email protected] [email protected] [email protected] BDL [email protected] ND@20 ND@5 ND@100 ND@58/24/10 [email protected] [email protected] [email protected] [email protected] BDL [email protected] ND@20 ND@5 ND@100 ND@59/9/10 [email protected] [email protected] [email protected] [email protected] BDL [email protected] ND@20 ND@5 ND@100 ND@5



11/16/10 [email protected] [email protected] [email protected] [email protected] BDL [email protected] ND@20 ND@5 ND@100 ND@511/30/10 [email protected] [email protected] [email protected] [email protected] BDL [email protected] ND@20 ND@5 ND@100 ND@512/14/10 [email protected] [email protected] [email protected] [email protected] BDL [email protected] ND@20 ND@5 ND@100 ND@512/28/10 [email protected] [email protected] [email protected] [email protected] BDL [email protected] ND@20 ND@5 ND@100 ND@51/11/11 [email protected] [email protected] [email protected] [email protected] BDL [email protected] ND@20 ND@5 ND@100 ND@51/25/11 [email protected] [email protected] [email protected] [email protected] BDL [email protected] ND@20 ND@5 ND@100 ND@52/8/11 [email protected] [email protected] [email protected] [email protected] BDL [email protected] ND@20 ND@5 ND@100 ND@53/1/11 [email protected] [email protected] [email protected] [email protected] BDL [email protected] ND@20 ND@5 ND@100 ND@5





Hampstead, Maryland


Toluene(µg/L)

Ethyl-benzene

(µg/L)

Xylenes(µg/L)

BTEX(µg/L)

MTBE(µg/L)

TBA(µg/L)

TAME(µg/L)

TPH-GRO(µg/L)

DiisopropylEther

124 Hanover 4/20/12 [email protected] [email protected] [email protected] [email protected] BDL [email protected] ND@20 ND@5 ND@100 ND@55/22/12 [email protected] [email protected] [email protected] [email protected] BDL [email protected] ND@20 ND@5 ND@100 ND@56/26/12 [email protected] [email protected] [email protected] [email protected] BDL [email protected] ND@10 [email protected] ND@100 ND@57/17/12 [email protected] [email protected] [email protected] [email protected] BDL [email protected] ND@20 ND@5 ND@100 ND@58/21/12 [email protected] [email protected] [email protected] [email protected] BDL [email protected] ND@20 ND@5 ND@100 ND@59/19/12 [email protected] [email protected] [email protected] [email protected] BDL [email protected] ND@20 ND@5 ND@100 ND@5


10/28/13 [email protected] [email protected] [email protected] [email protected] BDL [email protected] ND@20 ND@5 ND@100 ND@512/16/13 [email protected] [email protected] [email protected] [email protected] BDL [email protected] ND@20 ND@5 ND@100 ND@51/13/14 [email protected] [email protected] [email protected] [email protected] BDL [email protected] ND@20 ND@5 ND@100 ND@52/18/14 [email protected] [email protected] [email protected] [email protected] BDL [email protected] ND@20 ND@5 ND@100 ND@55/3/14 [email protected] [email protected] [email protected] [email protected] BDL [email protected] ND@20 ND@5 ND@100 ND@5



2/16/15 [email protected] [email protected] [email protected] [email protected] BDL [email protected] ND@20 ND@5 ND@100 ND@54/24/15 [email protected] [email protected] [email protected] [email protected] BDL [email protected] ND@20 ND@5 ND@100 ND@56/22/15 [email protected] [email protected] [email protected] [email protected] BDL [email protected] ND@20 ND@5 ND@100 ND@57/22/15 [email protected] [email protected] [email protected] [email protected] BDL [email protected] ND@20 ND@5 ND@100 ND@58/28/15 [email protected] [email protected] [email protected] [email protected] BDL [email protected] ND@20 ND@5 NA ND@59/25/15 [email protected] [email protected] [email protected] [email protected] BDL [email protected] ND@20 ND@5 NA ND@5

11/10/15 [email protected] [email protected] [email protected] [email protected] BDL [email protected] ND@20 ND@5 NA ND@51/27/16 [email protected] [email protected] [email protected] [email protected] BDL [email protected] ND@20 ND@5 NA ND@53/16/16 [email protected] [email protected] [email protected] [email protected] BDL [email protected] ND@20 ND@5 NA ND@55/30/16 [email protected] [email protected] [email protected] [email protected] BDL [email protected] ND@20 ND@5 NA ND@57/13/16 [email protected] [email protected] [email protected] [email protected] BDL [email protected] ND@20 ND@5 NA ND@59/27/16 [email protected] [email protected] [email protected] [email protected] BDL [email protected] ND@20 ND@5 NA ND@5

11/11/16 [email protected] [email protected] [email protected] [email protected] BDL [email protected] ND@20 ND@5 NA ND@51/31/17 [email protected] [email protected] [email protected] [email protected] BDL [email protected] ND@20 ND@5 NA ND@53/31/17 [email protected] [email protected] [email protected] [email protected] BDL [email protected] ND@20 ND@5 NA ND@55/19/17 [email protected] [email protected] [email protected] [email protected] BDL [email protected] ND@20 ND@5 NA ND@58/11/17 [email protected] [email protected] [email protected] [email protected] BDL [email protected] ND@20 ND@5 NA ND@59/13/17 [email protected] [email protected] [email protected] [email protected] BDL [email protected] ND@20 ND@5 NA ND@511/7/17 [email protected] [email protected] [email protected] [email protected] BDL [email protected] ND@20 ND@5 NA ND@51/30/18 [email protected] [email protected] [email protected] [email protected] BDL [email protected] ND@20 ND@5 NA ND@53/26/18 [email protected] [email protected] [email protected] [email protected] BDL [email protected] ND@20 ND@5 NA ND@55/30/18 [email protected] [email protected] [email protected] [email protected] BDL [email protected] ND@20 ND@5 NA ND@57/17/18 [email protected] [email protected] [email protected] [email protected] BDL [email protected] ND@20 ND@5 NA ND@59/11/18 [email protected] [email protected] [email protected] [email protected] BDL [email protected] ND@20 ND@5 NA ND@5

10/19/18 [email protected] [email protected] [email protected] [email protected] BDL [email protected] ND@20 ND@5 NA ND@511/20/18 [email protected] [email protected] [email protected] [email protected] BDL [email protected] ND@20 ND@5 NA ND@51/31/19 [email protected] [email protected] [email protected] [email protected] BDL [email protected] ND@20 ND@5 NA ND@53/7/19 [email protected] [email protected] [email protected] [email protected] BDL [email protected] ND@20 ND@5 NA ND@5

MDE CLEANUP STD 5 1,000 700 10,000 -- 20 -- -- 47 --

BTEX - Total Benzene, Toluene, Ethylbenzene and Xylenes ND - not detectedMTBE - Methyl Tert-Butyl Ether NI - not installedTBA - Tert-Butyl Alcohol NA - not analyzedTAME - Tert-Amyl Methyl Ether NS - inaccessibleTPH-GRO - Total Petroleum Hydrocarbons - Gasoline Range Organics E - estimated result; exceeds calibration rangeµg/L - micrograms-per-liter Bold - indicates level above the MDE Cleanup StandardND@x - not detected above laboratory detection level of x

Table 4Residential Potable Well Sampling Results

7-Eleven Store No. 32785Hampstead, Maryland


Toluene(µg/L)

Ethylbenzene(µg/L)

Xylenes(µg/L)

BTEX(µg/L)

MTBE(µg/L)

TBA(µg/L)

TAME(µg/L)

TPH-GRO(µg/L)

6/2/10 [email protected] [email protected] [email protected] [email protected] ND [email protected] ND@20 ND@5 ND@10011/16/10 NS NS NS NS NS NS NS NS NS6/26/12 [email protected] [email protected] [email protected] [email protected] ND [email protected] ND@20 ND@5 ND@1006/28/13 [email protected] [email protected] [email protected] [email protected] ND [email protected] ND@20 ND@5 ND@1006/29/151 [email protected] [email protected] [email protected] [email protected] ND [email protected] ND@10 [email protected] NS8/17/18 [email protected] [email protected] [email protected] [email protected] ND [email protected] ND@10 [email protected] NA

6/2/10 [email protected] [email protected] [email protected] [email protected] ND 1.3 ND@20 ND@5 ND@10011/16/10 [email protected] [email protected] [email protected] [email protected] ND 0.9 ND@20 ND@5 ND@1006/24/14 [email protected] [email protected] [email protected] [email protected] ND [email protected] ND@20 ND@5 NA6/29/15 NS NS NS NS NS NS NS NS NS8/15/18 [email protected] [email protected] [email protected] [email protected] ND [email protected] ND@10 [email protected] NA

8/15/18 [email protected] [email protected] [email protected] [email protected] ND [email protected] ND@10 [email protected] NA



6/2/10 NS NS NS NS NS NS NS NS NS11/16/10 [email protected] [email protected] [email protected] [email protected] ND [email protected] ND@20 ND@5 ND@1006/26/12 [email protected] [email protected] [email protected] [email protected] ND [email protected] ND@20 ND@5 ND@1006/28/13 [email protected] [email protected] [email protected] [email protected] ND [email protected] ND@20 ND@5 ND@1006/29/15 NS NS NS NS NS NS NS NS NS8/15/18 [email protected] [email protected] [email protected] [email protected] ND [email protected] ND@10 [email protected] NA

MDE CLEANUP STD 5 1,000 700 10,000 -- 20 -- -- 471 Sample collected from 116 Hanover Pike on 6/29/15 incorrectly labeled as 114 Hanover Pike

TBA - Tert-Butyl AlcoholTAME - Tert-Amyl Methyl EtherTPH-GRO - Total Petroleum Hydrocarbons - Gasoline Range Organicsµg/L - micrograms-per-literND@x - not detected above laboratory detection level of xND - not detectedNS - inaccessible; could not contact property owner/residentsBold - indicates level above the MDE Cleanup Standard

BTEX - Total Benzene, Toluene, Ethylbenzene and XylenesMTBE - Methyl Tert-Butyl Ether

114 Hanover Pike

95 Phillips Drive

118 Hanover Pike

135 Hanover Pike

123 Hanover Pike

130 Hanover Pike

Table 5: Pumping Wells Groundwater Analytical Results7-Eleven Store No. 32785

Hampstead, Maryland

SampleID Date Benzene

(µg/L)Toluene(µg/L)

Ethyl-benzene

(µg/L)

Xylenes(µg/L)

BTEX(µg/L)

MTBE(µg/L)

TBA(µg/L)

TAME(µg/L)

TPH-GRO(µg/L)

TPH-DRO(mg/L)

MW-8 9/23/15 ND@1 ND@1 ND@1 ND@3 ND 308 25.1 5.86 246 NA12/16/15 ND@1 ND@1 ND@1 ND@3 ND 4.5 ND@10 ND@1 ND@100 NA

2/4/16 ND@1 ND@1 ND@1 ND@3 ND 3.3 2.64 J ND@1 NA NA2/16/16 ND@1 ND@1 ND@1 ND@3 ND 14.7 ND@10 ND@1 ND@100 NA3/4/16 ND@1 ND@1 ND@1 ND@3 ND 4.4 ND@10 ND@1 ND@100 NA


4/20/16 ND@1 10.5 ND@1 ND@3 10.5 246 48.1 5.95 201 NA5/5/16 ND@1 ND@1 ND@1 ND@3 ND 5.6 23.7 ND@1 ND@100 NA

5/19/16 ND@1 1.17 ND@1 ND@3 1.17 267 25 5.24 264 NA6/2/16 ND@1 ND@1 ND@1 ND@3 ND 4.9 ND@10 ND@1 ND@100 NA

6/14/16 ND@1 ND@1 ND@1 ND@3 ND 152 18.6 3 122 NA7/14/16 ND@1 ND@1 ND@1 ND@3 ND 178 96.5 2.94 172 NA8/1/16 ND@1 ND@1 ND@1 ND@3 ND 4.01 ND@10 ND@1 ND@100 NA


9/16/16 ND@1 ND@1 ND@1 ND@3 ND 3.3 ND@10 ND@1 ND@100 NA10/4/16 ND@1 ND@1 ND@1 ND@3 ND 156 12.4 2.84 193 NA10/17/16 ND@1 ND@1 ND@1 ND@3 ND 6.7 ND@10 ND@1 ND@100 NA11/1/16 ND@1 ND@1 ND@1 ND@3 ND 25.7 ND@10 ND@1 ND@100 NA11/21/16 ND@1 ND@1 ND@1 ND@3 ND 3.3 ND@10 ND@1 ND@100 NA12/16/16 ND@1 ND@1 ND@1 ND@3 ND 79.6 ND@10 ND@1 ND@100 NA12/31/16 ND@1 ND@1 ND@1 ND@3 ND 24.2 ND@10 ND@1 ND@100 NA1/11/17 ND@1 ND@1 ND@1 ND@3 ND 6.7 ND@10 ND@1 ND@100 NA1/27/17 ND@1 ND@1 ND@1 ND@3 ND 3.4 ND@10 ND@1 ND@100 NA2/10/17 ND@1 ND@1 ND@1 ND@3 ND 4.7 ND@10 ND@1 ND@100 NA2/28/17 ND@1 ND@1 ND@1 ND@3 ND 3.2 ND@10 ND@1 ND@100 NA3/16/17 ND@1 ND@1 ND@1 ND@3 ND 3.6 ND@10 ND@1 ND@100 NA3/29/17 ND@1 ND@1 ND@1 ND@3 ND ND@1 ND@10 ND@1 ND@100 NA4/7/17 ND@1 ND@1 ND@1 ND@3 ND 8.94 ND@10 ND@1 ND@100 NA



6/28/17 ND@1 ND@1 ND@1 ND@3 ND 89.6 ND@10 1.46 ND@100 NA7/24/17 ND@1 ND@1 ND@1 ND@3 ND 107 NA NA 134 NA8/24/17 ND@1 ND@1 ND@1 ND@3 ND 273 ND@10 5.35 289 NA9/20/17 ND@1 ND@1 ND@1 ND@3 ND 329 16.2 6.30 434 NA10/13/17 ND@1 ND@1 ND@1 ND@3 ND 34.3 NA NA ND@100 NA10/23/17 ND@1 ND@1 ND@1 ND@3 ND 7.02 NA NA ND@100 NA11/8/17 ND@1 ND@1 ND@1 ND@3 ND 3.33 NA NA ND@100 NA11/27/17 ND@1 ND@1 ND@1 ND@3 ND 164 NA NA 153 NA12/8/17 ND@1 ND@1 ND@1 ND@3 ND 5.65 ND@10 ND@1 ND@100 NA12/26/17 ND@1 3.89 ND@1 ND@3 3.89 28 NA NA ND@100 NA

1/9/18 ND@1 ND@1 ND@1 ND@3 ND 89 NA NA ND@100 NA1/25/18 ND@1 ND@1 ND@1 ND@3 ND 59.6 NA NA ND@100 NA2/6/18 ND@1 ND@1 ND@1 ND@3 ND 47.4 NA NA ND@100 NA

2/19/18 ND@1 ND@1 ND@1 ND@3 ND 48.8 NA NA ND@100 NA3/12/18 ND@1 ND@1 ND@1 ND@3 ND 41.2 NA NA ND@100 NA3/26/18 ND@1 ND@1 ND@1 ND@3 ND 21.2 ND@10 ND@1 ND@100 NA4/17/18 ND@1 ND@1 ND@1 ND@3 ND 18.3 NA NA ND@100 NA4/30/18 ND@1 ND@1 ND@1 ND@3 ND 18 NA NA ND@100 NA5/17/18 ND@1 ND@1 ND@1 ND@3 ND 10.2 NA NA ND@100 NA5/30/18 ND@1 ND@1 ND@1 ND@3 ND 15.1 NA NA ND@100 NA6/29/18 ND@1 ND@1 ND@1 ND@3 ND 45.4 ND@10 ND@1 ND@100 NA7/17/18 ND@1 ND@1 ND@1 ND@3 ND 6.33 ND@10 ND@1 ND@100 NA7/30/18 ND@1 ND@1 ND@1 ND@3 ND 8.74 ND@10 ND@1 ND@100 NA8/16/18 ND@1 ND@1 ND@1 ND@3 ND 5.95 ND@10 ND@1 ND@100 NA8/27/18 ND@1 ND@1 ND@1 ND@3 ND 5.11 NA NA ND@100 NA9/11/18 ND@1 ND@1 ND@1 ND@3 ND 11.8 NA NA ND@100 NA10/19/18 ND@1 ND@1 ND@1 ND@3 ND 41.4 ND@10 ND@1 ND@100 NA11/20/18 ND@1 ND@1 ND@1 ND@3 ND 103 ND@10 1.84 ND@100 NA12/6/18 ND@1 ND@1 ND@1 ND@3 ND 96.3 ND@10 1.94 106 NA3/7/19 ND@1 ND@1 ND@1 ND@3 ND 68.5 ND@10 1.30 111 NA


Hampstead, Maryland

MW-9 9/23/15 ND@1 ND@1 ND@1 ND@3 ND 634 31.1 12.3 494 NA12/16/15 ND@1 ND@1 ND@1 ND@3 ND 151 ND@10 1.6 141 NA

2/4/16 ND@1 ND@1 ND@1 ND@3 ND 72.9 7.35 0.464 J NA NA2/16/16 ND@1 ND@1 ND@1 ND@3 ND 180 16.3 4.6 115 NA3/4/16 ND@1 ND@1 ND@1 ND@3 ND 104 ND@10 ND@1 ND@100 NA

3/16/16 ND@1 ND@1 ND@1 ND@3 ND 48.3 ND@10 1.44 ND@100 NA4/4/16 ND@1 ND@1 ND@1 ND@3 ND 48.4 ND@10 ND@1 ND@100 NA



6/14/16 ND@1 ND@1 ND@1 ND@3 ND 1,330 290 33.8 1,240 NA7/14/16 ND@1 ND@1 ND@1 ND@3 ND 6.70 ND@10 ND@1 ND@100 NA8/1/16 ND@1 ND@1 ND@1 ND@3 ND 35.5 ND@10 ND@1 ND@100 NA

8/16/16 ND@1 ND@1 ND@1 ND@3 ND 2.49 ND@10 ND@1 ND@100 NA9/3/16 ND@1 ND@1 ND@1 ND@3 ND 189 ND@10 3.29 129 NA

9/16/16 ND@1 ND@1 ND@1 ND@3 ND 17 ND@10 3.29 ND@100 NA10/4/16 ND@1 ND@1 ND@1 ND@3 ND ND@1 ND@10 ND@1 ND@100 NA10/17/16 ND@1 ND@1 ND@1 ND@3 ND 20.4 ND@10 ND@1 ND@100 NA11/1/16 ND@1 ND@1 ND@1 ND@3 ND 1,190 164 32 560 NA11/21/16 ND@1 ND@1 ND@1 ND@3 ND 7.43 ND@10 ND@1 ND@100 NA12/16/16 ND@1 ND@1 ND@1 ND@3 ND 733 49.5 17.2 627 NA12/31/16 ND@1 ND@1 ND@1 ND@3 ND 106 ND@10 1.62 112 NA1/11/17 ND@1 ND@1 ND@1 ND@3 ND 21.7 ND@10 ND@1 ND@100 NA1/27/17 ND@1 ND@1 ND@1 ND@3 ND 6.8 ND@10 ND@1 ND@100 NA2/10/17 ND@1 ND@1 ND@1 ND@3 ND 5.4 ND@10 ND@1 ND@100 NA3/28/17 ND@1 ND@1 ND@1 ND@3 ND 3.8 ND@10 ND@1 ND@100 NA3/16/17 ND@1 ND@1 ND@1 ND@3 ND 3.6 ND@10 ND@1 ND@100 NA3/29/17 ND@1 ND@1 ND@1 ND@3 ND ND@1 ND@10 ND@1 ND@100 NA4/7/17 ND@1 ND@1 ND@1 ND@3 ND 17.9 ND@10 ND@1 ND@100 NA



6/28/17 ND@1 ND@1 ND@1 ND@3 ND 4.74 ND@10 ND@1 ND@100 NA7/24/17 ND@1 ND@1 ND@1 ND@3 ND 26.5 NA NA ND@100 NA8/24/17 ND@1 ND@1 ND@1 ND@3 ND 203 ND@10 4.44 250 NA9/20/17 ND@1 ND@1 ND@1 ND@3 ND 266 11.6 5.01 356 NA10/13/17 ND@1 ND@1 ND@1 ND@3 ND 99.3 NA NA 128 NA10/23/17 ND@1 ND@1 ND@1 ND@3 ND 8.09 NA NA ND@100 NA11/8/17 ND@1 ND@1 ND@1 ND@3 ND 9.38 NA NA ND@100 NA11/27/17 ND@1 ND@1 ND@1 ND@3 ND 119 NA NA 147 NA12/8/17 ND@1 ND@1 ND@1 ND@3 ND 18.7 ND@10 ND@1 ND@100 NA12/26/17 ND@1 ND@1 ND@1 ND@3 ND 10.2 NA NA ND@100 NA

1/9/18 ND@1 ND@1 ND@1 ND@3 ND 165 NA NA 150 NA1/25/18 ND@1 ND@1 ND@1 ND@3 ND 125 NA NA 103 NA2/6/18 ND@1 ND@1 ND@1 ND@3 ND 40.4 NA NA ND@100 NA

2/19/18 ND@1 ND@1 ND@1 ND@3 ND 72.8 NA NA ND@100 NA3/12/18 ND@1 ND@1 ND@1 ND@3 ND 51.7 NA NA ND@100 NA3/26/18 ND@1 ND@1 ND@1 ND@3 ND 75.4 ND@10 1.14 ND@100 NA4/17/18 ND@1 ND@1 ND@1 ND@3 ND 83 NA NA ND@100 NA4/30/18 ND@1 ND@1 ND@1 ND@3 ND 47.1 NA NA ND@100 NA5/17/18 ND@1 ND@1 ND@1 ND@3 ND 17.5 NA NA ND@100 NA5/30/18 ND@1 ND@1 ND@1 ND@3 ND 27.8 NA NA ND@100 NA6/29/18 ND@1 ND@1 ND@1 ND@3 ND 26.9 ND@10 ND@1 ND@100 NA7/17/18 ND@1 ND@1 ND@1 ND@3 ND 43.8 ND@10 ND@1 ND@100 NA7/30/18 ND@1 ND@1 ND@1 ND@3 ND 17.1 ND@10 ND@1 ND@100 NA8/16/18 ND@1 ND@1 ND@1 ND@3 ND 14.1 ND@10 ND@1 ND@100 NA8/27/18 ND@1 ND@1 ND@1 ND@3 ND 17.5 NA NA ND@100 NA9/11/18 ND@1 ND@1 ND@1 ND@3 ND 5.92 NA NA ND@100 NA10/19/18 ND@1 ND@1 ND@1 ND@3 ND 5.39 ND@10 ND@1 ND@100 NA11/20/18 ND@1 ND@1 ND@1 ND@3 ND 17.6 ND@10 ND@1 ND@100 NA12/6/18 ND@1 ND@1 ND@1 ND@3 ND 40.7 ND@10 1.02 ND@100 NA3/7/19 ND@1 ND@1 ND@1 ND@3 ND 3.11 ND@10 ND@1 ND@20 NA


Hampstead, Maryland

MW-10 9/23/15 ND@1 ND@1 ND@1 ND@3 ND 1.14 ND@10 ND@1 ND@100 NA12/16/15 ND@1 ND@1 ND@1 ND@3 ND ND@1 ND@10 ND@1 ND@100 NA

2/4/16 ND@1 ND@1 ND@1 ND@3 ND 0.518 J ND@10 ND@1 ND@100 NA2/16/16 ND@1 ND@1 ND@1 ND@3 ND 7.36 ND@10 ND@1 ND@100 NA3/4/16 ND@1 ND@1 ND@1 ND@3 ND ND@1 ND@10 ND@1 ND@100 NA

3/16/16 ND@1 ND@1 ND@1 ND@3 ND 1.62 ND@10 ND@1 ND@100 NA4/4/16 ND@1 ND@1 ND@1 ND@3 ND ND@1 ND@10 ND@1 ND@100 NA

4/20/16 ND@1 ND@1 ND@1 ND@3 ND ND@1 ND@10 ND@1 ND@100 NA5/5/16 ND@1 ND@1 ND@1 ND@3 ND ND@1 16.1 ND@1 ND@100 NA




9/16/16 ND@1 ND@1 ND@1 ND@3 ND ND@1 ND@10 ND@1 ND@100 NA10/4/16 ND@1 ND@1 ND@1 ND@3 ND ND@1 ND@10 ND@1 ND@100 NA10/17/16 ND@1 ND@1 ND@1 ND@3 ND ND@1 ND@10 ND@1 ND@100 NA11/1/16 ND@1 ND@1 ND@1 ND@3 ND ND@1 ND@10 ND@1 ND@100 NA11/21/16 ND@1 ND@1 ND@1 ND@3 ND ND@1 ND@10 ND@1 ND@100 NA12/16/16 ND@1 ND@1 ND@1 ND@3 ND ND@1 ND@10 ND@1 ND@100 NA12/31/16 ND@1 ND@1 ND@1 ND@3 ND ND@1 ND@10 ND@1 ND@100 NA1/11/17 ND@1 ND@1 ND@1 ND@3 ND ND@1 ND@10 ND@1 ND@100 NA1/27/17 ND@1 ND@1 ND@1 ND@3 ND ND@1 ND@10 ND@1 ND@100 NA2/10/17 ND@1 ND@1 ND@1 ND@3 ND ND@1 ND@10 ND@1 ND@100 NA2/28/17 ND@1 ND@1 ND@1 ND@3 ND ND@1 ND@10 ND@1 ND@100 NA3/16/17 ND@1 ND@1 ND@1 ND@3 ND ND@1 ND@10 ND@1 ND@100 NA3/29/17 ND@1 ND@1 ND@1 ND@3 ND ND@1 ND@10 ND@1 ND@100 NA4/7/17 ND@1 ND@1 ND@1 ND@3 ND ND@1 ND@10 ND@1 ND@100 NA



6/28/17 ND@1 ND@1 ND@1 ND@3 ND ND@1 ND@10 ND@1 ND@100 NA7/24/17 ND@1 ND@1 ND@1 ND@3 ND ND@1 NA NA ND@100 NA8/24/17 ND@1 ND@1 ND@1 ND@3 ND ND@1 NA NA ND@100 NA9/20/17 ND@1 ND@1 ND@1 ND@3 ND ND@1 NA NA ND@100 NA10/13/17 ND@1 ND@1 ND@1 ND@3 ND ND@1 NA NA ND@100 NA10/23/17 ND@1 ND@1 ND@1 ND@3 ND ND@1 NA NA ND@100 NA11/8/17 ND@1 ND@1 ND@1 ND@3 ND ND@1 NA NA ND@100 NA11/27/17 ND@1 ND@1 ND@1 ND@3 ND ND@1 NA NA ND@100 NA12/8/17 ND@1 ND@1 ND@1 ND@3 ND ND@1 ND@10 ND@1 ND@100 NA12/26/17 ND@1 ND@1 ND@1 ND@3 ND ND@1 NA NA ND@100 NA

1/9/18 ND@1 ND@1 ND@1 ND@3 ND ND@1 NA NA ND@100 NA1/25/18 ND@1 ND@1 ND@1 ND@3 ND ND@1 NA NA ND@100 NA2/6/18 ND@1 ND@1 ND@1 ND@3 ND ND@1 NA NA ND@100 NA

2/19/18 ND@1 ND@1 ND@1 ND@3 ND ND@1 NA NA ND@100 NA3/12/18 ND@1 ND@1 ND@1 ND@3 ND ND@1 NA NA ND@100 NA3/26/18 ND@1 ND@1 ND@1 ND@3 ND ND@1 ND@10 ND@1 ND@100 NA4/17/18 ND@1 ND@1 ND@1 ND@3 ND ND@1 NA NA ND@100 NA4/30/18 ND@1 ND@1 ND@1 ND@3 ND ND@1 NA NA ND@100 NA5/17/18 ND@1 ND@1 ND@1 ND@3 ND ND@1 NA NA ND@100 NA5/30/18 ND@1 ND@1 ND@1 ND@3 ND ND@1 NA NA ND@100 NA6/29/18 ND@1 ND@1 ND@1 ND@3 ND ND@1 ND@10 ND@1 ND@100 NA7/17/18 ND@1 ND@1 ND@1 ND@3 ND ND@1 ND@10 ND@1 ND@100 NA7/30/18 ND@1 ND@1 ND@1 ND@3 ND ND@1 ND@10 ND@1 ND@100 NA8/16/18 ND@1 ND@1 ND@1 ND@3 ND ND@1 ND@10 ND@1 ND@100 NA8/27/18 ND@1 ND@1 ND@1 ND@3 ND ND@1 NA NA ND@100 NA9/11/18 ND@1 ND@1 ND@1 ND@3 ND ND@1 NA NA ND@100 NA10/19/18 ND@1 ND@1 ND@1 ND@3 ND ND@1 NA NA ND@100 NA11/20/18 ND@1 ND@1 ND@1 ND@3 ND ND@1 NA NA ND@100 NA12/6/18 ND@1 ND@1 ND@1 ND@3 ND ND@1 NA NA ND@100 NA3/7/19 ND@1 ND@1 ND@1 ND@3 ND ND@1 NA NA ND@100 NA

MDE CLEANUP STD 5 1,000 700 10,000 -- 20 -- -- 47 47

ND@x - not detected above laboratory detection level of x

ND - not detected

TBA - Tert-Butyl Alcohol NI - not installed

TAME - Tert-Amyl Methyl Ether NA - not analyzed

µg/L - micrograms-per-liter NS - inaccessible

Bold - indicates level above the MDE Cleanup Standard E - estimated result; exceeds calibration range

BTEX - Total Benzene, Toluene, Ethylbenzene and Xylenes

MTBE - Methyl Tert-Butyl Ether

Table 6Groundwater Remediation System Performance Data

7-Eleven Store No. 32785Hampstead, MD

Date Pump MW-8 (gallons)

Change from previous (gallons)

Average GPD

Average GPM

Total Gallons

Removed (since

activation)


Change from

previous (gallons)

Average GPD

Average GPM

Total Gallons

Removed (since

activation)


Change from

previous (gallons)

Average GPD

Average GPM

Total Gallons

Removed (since

activation)10/8/2013 131 ** ** ** 131 10/8/2013 114 ** ** ** 114 10/8/2013 183 ** ** ** 18310/9/2013 477 346 346 0.24 477 10/9/2013 398 284 284 0.20 398 10/9/2013 1,673 1,490 1,490 1.03 1,673

10/10/2013 1,940 1,463 1,463 1.02 1,940 10/10/2013 398 0 0 0.00 398 10/10/2013 3,600 1,927 1,927 1.34 3,60010/14/2013 7,922 5,982 1,496 1.04 7,922 10/14/2013 398 0 0 0.00 398 10/14/2013 11,540 7,940 1,985 1.38 11,54010/17/2013 14,983 7,061 2,354 1.63 14,983 10/17/2013 1,792 1,394 465 0.32 1,792 10/17/2013 21,140 9,600 3,200 2.22 21,14010/21/2013 23,351 8,368 2,092 1.45 23,351 10/21/2013 4,409 2,617 654 0.45 4,409 10/21/2013 32,540 11,400 2,850 1.98 32,54010/25/2013 31,526 8,175 2,044 1.42 31,526 10/25/2013 6,860 2,451 613 0.43 6,860 10/25/2013 47,980 15,440 3,860 2.68 47,98010/28/2013 38,184 6,658 2,219 1.54 38,184 10/28/2013 8,762 1,902 634 0.44 8,762 10/28/2013 60,680 12,700 4,233 2.94 60,68011/14/2013 70,341 32,157 1,892 1.31 70,341 11/14/2013 14,917 6,155 362 0.25 14,917 11/14/2013 126,225 65,545 3,856 2.68 126,22511/25/2013 89,282 18,941 1,722 1.20 89,282 11/25/2013 17,618 2,701 246 0.17 17,618 11/25/2013 180,720 54,495 4,954 3.44 180,72012/16/2013 123,263 33,981 1,618 1.12 123,263 12/16/2013 23,147 5,529 263 0.18 23,147 12/16/2013 285,260 104,540 4,978 3.46 285,26012/31/2013 137,828 14,565 971 0.67 137,828 12/31/2013 26,235 3,088 206 0.14 26,235 12/31/2013 332,092 46,832 3,122 2.17 332,0921/13/2014 148,714 10,886 837 0.58 148,714 1/13/2014 27,393 1,158 89 0.06 27,393 1/13/2014 369,070 36,978 2,844 1.98 369,0701/28/2014 157,920 9,206 614 0.43 157,920 1/28/2014 27,393 0 0 0.00 27,393 1/28/2014 401,120 32,050 2,137 1.48 401,1201/29/2014 159,504 1,584 1,584 1.10 159,504 1/29/2014 27,393 0 0 0.00 27,393 1/29/2014 406,695 5,575 5,575 3.87 406,6952/10/2014 178,602 19,098 1,592 1.11 178,602 2/10/2014 27,393 0 0 0.00 27,393 2/10/2014 462,080 55,385 4,615 3.21 462,0802/18/2014 191,040 12,438 1,555 1.08 191,040 2/18/2014 27,393 0 0 0.00 27,393 2/18/2014 503,535 41,455 5,182 3.60 503,5352/25/2014 201,813 10,773 1,539 1.07 201,813 2/25/2014 27,393 0 0 0.00 27,393 2/25/2014 540,925 37,390 5,341 3.71 540,9253/4/2014 212,660 10,847 1,550 1.08 212,660 3/4/2014 27,393 0 0 0.00 27,393 3/4/2014 579,263 38,338 5,477 3.80 579,263

3/11/2014 222,547 9,887 1,412 0.98 222,547 3/11/2014 27,393 0 0 0.00 27,393 3/11/2014 614,575 35,312 5,045 3.50 614,5753/18/2014 231,308 8,761 1,252 0.87 231,308 3/18/2014 27,393 0 0 0.00 27,393 3/18/2014 652,500 37,925 5,418 3.76 652,5003/24/2014 238,524 7,216 1,203 0.84 238,524 3/24/2014 27,393 0 0 0.00 27,393 3/24/2014 684,480 31,980 5,330 3.70 684,4803/31/2014 246,694 8,170 1,167 0.81 246,694 3/31/2014 27,393 0 0 0.00 27,393 3/31/2014 721,586 37,106 5,301 3.68 721,5864/8/2014 255,420 8,726 1,091 0.76 255,420 4/8/2014 27,393 0 0 0.00 27,393 4/8/2014 762,533 40,947 5,118 3.55 762,533

4/14/2014 262,270 6,850 1,142 0.79 262,270 4/14/2014 27,393 0 0 0.00 27,393 4/14/2014 795,757 33,224 5,537 3.85 795,7574/21/2014 270,014 7,744 1,106 0.77 270,014 4/21/2014 27,393 0 0 0.00 27,393 4/21/2014 833,580 37,823 5,403 3.75 833,5804/28/2014 279,151 9,137 1,305 0.91 279,151 4/28/2014 27,393 0 0 0.00 27,393 4/28/2014 870,358 36,778 5,254 3.65 870,3585/6/2014 290,495 11,344 1,418 0.98 290,495 5/6/2014 27,393 0 0 0.00 27,393 5/6/2014 912,349 41,991 5,249 3.65 912,3495/7/2014 291,653 1,158 1,158 0.80 291,653 5/7/2014 28,010 617 617 0.43 28,010 5/7/2014 914,776 2,427 2,427 1.69 914,7765/8/2014 293,177 1,524 1,524 1.06 293,177 5/8/2014 28,774 764 764 0.53 28,774 5/8/2014 918,471 3,695 3,695 2.57 918,471

5/12/2014 298,580 5,403 1,351 0.94 298,580 5/12/2014 31,800 3,026 757 0.53 31,800 5/12/2014 936,670 18,199 4,550 3.16 936,6705/15/2014 302,212 3,632 1,211 0.84 302,212 5/15/2014 33,025 1,225 408 0.28 33,025 5/15/2014 948,992 12,322 4,107 2.85 948,9925/16/2014 303,575 1,363 1,363 0.95 303,575 5/16/2014 33,645 620 620 0.43 33,645 5/16/2014 953,973 4,981 4,981 3.46 953,9735/21/2014 309,961 6,386 1,277 0.89 309,961 5/21/2014 34,231 586 117 0.08 34,231 5/21/2014 975,498 21,525 4,305 2.99 975,4985/23/2014 312,090 2,129 1,065 0.74 312,090 5/23/2014 35,110 879 440 0.31 35,110 5/23/2014 982,944 7,446 3,723 2.59 982,9445/27/2014 317,206 5,116 1,279 0.89 317,206 5/27/2014 37,187 2,077 519 0.36 37,187 5/27/2014 1,000,000 17,056 4,264 2.96 1,000,0006/9/2014 332,887 15,681 1,206 0.84 332,887 6/9/2014 43,314 6,127 471 0.33 43,314 6/9/2014 1,055,974 55,974 4,306 2.99 1,055,974

6/24/2014 351,101 18,214 1,214 0.84 351,101 6/24/2014 50,260 6,946 463 0.32 50,260 6/24/2014 1,121,024 65,050 4,337 3.01 1,121,0247/9/2014 369,390 18,289 1,219 0.85 369,390 7/9/2014 57,197 6,937 462 0.32 57,197 7/9/2014 1,187,345 66,321 4,421 3.07 1,187,345

7/23/2014 386,232 16,842 1,203 0.84 386,232 7/23/2014 63,434 6,237 446 0.31 63,434 7/23/2014 1,248,531 61,186 4,370 3.04 1,248,5318/5/2014 402,140 15,908 1,224 0.85 402,140 8/5/2014 69,219 5,785 445 0.31 69,219 8/5/2014 1,306,277 57,746 4,442 3.08 1,306,277

8/22/2014 422,431 20,291 1,194 0.83 422,431 8/22/2014 76,517 7,298 429 0.30 76,517 8/22/2014 1,381,383 75,106 4,418 3.07 1,381,3839/2/2014 435,525 13,094 1,190 0.83 435,525 9/2/2014 81,269 4,752 432 0.30 81,269 9/5/2014 1,431,471 50,088 3,578 2.48 1,431,471

9/16/2014 451,612 16,087 1,149 0.80 451,612 9/16/2014 87,168 5,899 421 0.29 87,168 9/16/2014 1,495,075 63,604 5,782 4.02 1,495,07510/13/2014 482,371 30,759 1,139 0.79 482,371 10/13/2014 99,322 12,154 450 0.31 99,322 10/13/2014 1,620,949 125,874 4,662 3.24 1,620,94910/31/2014 502,330 19,959 1,109 0.77 502,330 10/31/2014 107,002 7,680 427 0.30 107,002 10/31/2014 1,705,814 84,865 4,715 3.27 1,705,81411/10/2014 513,512 11,182 1,118 0.78 513,512 11/10/2014 111,271 4,269 427 0.30 111,271 11/10/2014 1,754,940 49,126 4,913 3.41 1,754,94011/24/2014 528,740 15,228 1,088 0.76 528,740 11/24/2014 117,038 5,767 412 0.29 117,038 11/24/2014 1,823,595 68,655 4,904 3.41 1,823,59512/3/2014 538,537 9,797 1,089 0.76 538,537 12/3/2014 120,706 3,668 408 0.28 120,706 12/3/2014 1,868,917 45,322 5,036 3.50 1,868,917

12/29/2014 565,732 27,195 1,046 0.73 565,732 12/29/2014 130,836 10,130 390 0.27 130,836 12/29/2014 1,999,307 130,390 5,015 3.48 1,999,3071/9/2015 576,898 11,166 1,015 0.70 576,898 1/9/2015 134,891 4,055 369 0.26 134,891 1/9/2015 2,054,603 55,296 5,027 3.49 2,054,603

1/23/2015 590,998 14,100 1,007 0.70 590,998 1/23/2015 140,023 5,132 367 0.25 140,023 1/23/2015 2,126,643 72,040 5,146 3.57 2,126,6432/13/2015 612,091 21,093 1,004 0.70 612,091 2/13/2015 147,563 7,540 359 0.25 147,563 2/13/2015 2,236,594 109,951 5,236 3.64 2,236,5942/25/2015 623,768 11,677 973 0.68 623,768 2/25/2015 151,715 4,152 346 0.24 151,715 2/25/2015 2,299,753 63,159 5,263 3.66 2,299,7533/16/2015 642,081 18,313 964 0.67 642,081 3/16/2015 158,220 6,505 342 0.24 158,220 3/16/2015 2,401,750 101,997 5,368 3.73 2,401,7503/24/2015 649,670 7,589 949 0.66 649,670 3/24/2015 160,890 2,670 334 0.23 160,890 3/24/2015 2,443,900 42,150 5,269 3.66 2,443,9004/7/2015 663,300 13,630 974 0.68 663,300 4/7/2015 165,550 4,660 333 0.23 165,550 4/7/2015 2,519,170 75,270 5,376 3.73 2,519,170

4/21/2015 676,710 13,410 958 0.67 676,710 4/21/2015 170,090 4,540 324 0.23 170,090 4/21/2015 2,594,180 75,010 5,358 3.72 2,594,1805/6/2015 690,930 14,220 948 0.66 690,930 5/6/2015 176,570 6,480 432 0.30 176,570 5/6/2015 2,676,000 81,820 5,455 3.79 2,676,000

5/31/2015 715,080 24,150 966 0.67 715,080 5/31/2015 186,870 10,300 412 0.29 186,870 5/31/2015 2,817,230 141,230 5,649 3.92 2,817,2306/9/2015 722,480 7,400 822 0.57 722,480 6/9/2015 189,855 2,985 332 0.23 189,855 6/9/2015 2,861,716 44,486 4,943 3.43 2,861,716

6/22/2015 734,353 11,873 913 0.63 734,353 6/22/2015 194,463 7,593 345 0.24 194,463 6/22/2015 2,935,210 117,980 5,363 3.72 2,935,2107/13/2015 753,583 19,230 916 0.64 753,583 7/13/2015 201,700 7,237 345 0.24 201,700 7/13/2015 3,054,112 118,902 5,662 3.93 3,054,1127/22/2015 761,522 7,939 882 0.61 761,522 7/22/2015 204,631 2,931 326 0.23 204,631 7/22/2015 3,104,575 50,463 5,607 3.89 3,104,5758/6/2015 774,970 13,448 897 0.62 774,970 8/6/2015 209,536 4,905 327 0.23 209,536 8/6/2015 3,191,134 86,559 5,771 4.01 3,191,134

8/28/2015 781,690 6,720 305 0.21 781,690 8/28/2015 212,020 2,484 113 0.08 212,020 8/28/2015 3,234,880 43,746 1,988 1.38 3,234,8809/23/2015 782,190 500 10 0.01 782,190 9/23/2015 214,350 4,814 100 0.07 214,350 9/23/2015 3,261,160 70,026 1,459 1.01 3,261,16010/7/2015 782,191 1 0.1 0.00 782,191 10/7/2015 214,350 0 0 0.00 214,350 10/7/2015 3,261,160 0 0 0.00 3,261,160

10/15/2015 787,082 4,891 611 0.42 787,082 10/15/2015 214,414 64 8 0.01 214,414 10/15/2015 3,293,656 32,496 4,062 2.82 3,293,65610/18/2015 788,200 1,118 373 0.26 788,200 10/18/2015 214,944 530 177 0.12 214,944 10/18/2015 3,299,184 5,528 1,843 1.28 3,299,18410/20/2015 792,020 3,820 1,910 1.33 792,020 10/20/2015 217,097 2,153 1,077 0.75 217,097 10/20/2015 3,323,938 24,754 12,377 8.60 3,323,93811/2/2015 804,825 12,805 985 0.68 804,825 11/2/2015 224,140 7,043 542 0.38 224,140 11/2/2015 3,410,073 86,135 6,626 4.60 3,410,073

11/16/2015 817,851 13,026 930 0.65 817,851 11/16/2015 231,149 7,009 501 0.35 231,149 11/16/2015 3,500,876 90,803 6,486 4.50 3,500,87612/2/2015 830,922 13,071 817 0.57 830,922 12/2/2015 238,658 7,509 469 0.33 238,658 12/2/2015 3,606,504 105,628 6,602 4.58 3,606,504

12/16/2015 842,172 11,250 804 0.56 842,172 12/16/2015 244,777 6,119 437 0.30 244,777 12/16/2015 3,697,761 91,257 6,518 4.53 3,697,7611/6/2016 858,088 15,916 758 0.53 858,088 1/6/2016 253,266 8,489 404 0.28 253,266 1/6/2016 3,831,189 133,428 6,354 4.41 3,831,1891/8/2016 859,819 1,731 866 0.60 859,819 1/8/2016 254,214 948 474 0.33 254,214 1/8/2016 3,844,312 13,123 6,562 4.56 3,844,312

1/20/2016 869,269 9,450 788 0.55 869,269 1/20/2016 259,318 5,104 425 0.30 259,318 1/20/2016 3,924,369 80,057 6,671 4.63 3,924,3691/27/2016 874,375 5,106 729 0.51 874,375 1/27/2016 262,083 2,765 395 0.27 262,083 1/27/2016 3,970,013 45,644 6,521 4.53 3,970,0132/4/2016 880,180 5,805 726 0.50 880,180 2/4/2016 265,223 3,140 393 0.27 265,223 2/4/2016 4,022,635 52,622 6,578 4.57 4,022,6352/6/2016 880,236 56 28 0.02 880,236 2/6/2016 265,253 30 15 0.01 265,253 2/16/2016 4,102,001 79,366 6,614 4.59 4,102,0013/4/2016 892,790 12,554 465 0.32 892,790 3/4/2016 273,760 8,507 315 0.22 273,760 3/4/2016 4,214,500 112,499 6,618 4.60 4,214,500

3/16/2016 892,800 10 1 0.00 892,800 3/16/2016 273,764 4 0 0.00 273,764 3/16/2016 4,293,373 78,873 6,573 4.56 4,293,3734/4/2016 906,552 13,752 724 0.50 906,552 4/4/2016 282,696 8,932 470 0.33 282,696 4/4/2016 4,416,957 123,584 6,504 4.52 4,416,957

4/20/2016 906,580 28 2 0.00 906,580 4/20/2016 282,710 14 1 0.00 282,710 4/20/2016 4,524,780 107,823 6,739 4.68 4,524,7805/5/2016 916,924 10,344 690 0.48 916,924 5/5/2016 288,788 6,078 405 0.28 288,788 5/5/2016 4,621,125 96,345 6,423 4.46 4,621,125

5/19/2016 916,967 43 3 0.00 916,967 5/19/2016 288,797 9 1 0.00 288,797 5/19/2016 4,715,879 94,754 6,768 4.70 4,715,8796/2/2016 926,688 9,721 694 0.48 926,688 6/2/2016 294,259 5,462 390 0.27 294,259 6/2/2016 4,806,121 90,242 6,446 4.48 4,806,121

6/14/2016 926,810 122 10 0.01 926,810 6/14/2016 294,320 61 5 0.00 294,320 6/14/2016 4,887,890 81,769 6,814 4.73 4,887,8907/1/2016 938,456 11,646 685 0.48 938,456 7/1/2016 300,466 6,146 362 0.25 300,466 7/1/2016 4,996,441 108,551 6,385 4.43 4,996,441

7/14/2016 938,472 16 1 0.00 938,472 7/14/2016 300,466 0 0 0.00 300,466 7/14/2016 5,082,462 86,021 6,617 4.60 5,082,4628/1/2016 951,470 12,998 722 0.50 951,470 8/1/2016 306,960 6,494 361 0.25 306,960 8/1/2016 5,200,050 117,588 6,533 4.54 5,200,050

8/16/2016 951,517 47 3 0.00 951,517 8/16/2016 306,985 25 2 0.00 306,985 8/16/2016 5,297,559 97,509 6,501 4.51 5,297,5599/2/2016 954,803 3,286 193 0.13 954,803 9/2/2016 308,441 1,456 86 0.06 308,441 9/2/2016 5,328,501 30,942 1,820 1.26 5,328,5019/3/2016 955,581 778 778 0.54 955,581 9/3/2016 309,301 860 860 0.60 309,301 9/3/2016 5,334,156 5,655 5,655 3.93 5,334,156

9/16/2016 964,320 8,739 672 0.47 964,320 9/16/2016 314,187 4,886 376 0.26 314,187 9/16/2016 5,418,230 84,074 6,467 4.49 5,418,23010/4/2016 964,501 181 10 0.01 964,501 10/4/2016 314,285 98 5 0.00 314,285 10/4/2016 5,537,870 119,640 6,647 4.62 5,537,870

10/17/2016 973,301 8,800 677 0.47 973,301 10/17/2016 318,942 4,657 358 0.25 318,942 10/17/2016 5,621,410 83,540 6,426 4.46 5,621,41011/1/2016 973,332 31 2 0.00 973,332 11/1/2016 318,969 27 2 0.00 318,969 11/1/2016 5,719,155 97,745 6,516 4.53 5,719,155

11/21/2016 987,145 13,813 691 0.48 987,145 11/21/2016 326,054 7,085 354 0.25 326,054 11/21/2016 5,846,310 127,155 6,358 4.42 5,846,31012/8/2016 987,190 45 3 0.00 987,190 12/8/2016 326,080 26 2 0.00 326,080 12/8/2016 5,957,890 111,580 6,564 4.56 5,957,890

12/23/2016 991,358 4,168 278 0.19 991,358 12/23/2016 328,621 2,541 169 0.12 328,621 12/23/2016 5,972,459 14,569 971 0.67 5,972,459

MW-10MW-9MW-8

Table 6Groundwater Remediation System Performance Data


1/11/2017 1,000,990 9,632 507 0.35 1,000,990 1/11/2017 332,460 3,839 202 0.14 332,460 1/11/2017 6,043,690 71,231 3,749 2.60 6,043,6901/27/2017 1,012,660 11,670 729 0.51 1,012,660 1/27/2017 337,510 5,050 316 0.22 337,510 1/27/2017 6,137,460 93,770 5,861 4.07 6,137,4602/10/2017 1,022,145 9,485 678 0.47 1,022,145 2/10/2017 341,662 4,152 297 0.21 341,662 2/10/2017 6,215,680 78,220 5,587 3.88 6,215,6802/28/2017 1,035,200 13,055 725 0.50 1,035,200 2/28/2017 346,838 5,176 288 0.20 346,838 2/28/2017 6,322,740 107,060 5,948 4.13 6,322,7403/16/2017 1,045,600 10,400 650 0.45 1,045,600 3/16/2017 351,497 4,659 291 0.20 351,497 3/16/2017 6,416,050 93,310 5,832 4.05 6,416,0503/29/2017 1,046,448 848 65 0.05 1,046,448 3/29/2017 351,848 351 27 0.02 351,848 3/29/2017 6,423,120 7,070 544 0.38 6,423,1204/7/2017 1,051,360 4,912 546 0.38 1,051,360 4/7/2017 354,010 2,162 240 0.17 354,010 4/7/2017 6,459,110 35,990 3,999 2.78 6,459,110

4/24/2017 1,051,391 31 2 0.00 1,051,391 4/24/2017 354,015 5 0 0.00 354,015 4/24/2017 6,459,321 211 12 0.01 6,459,3215/2/2017 1,056,970 5,579 697 0.48 1,056,970 5/2/2017 356,540 2,525 316 0.22 356,540 5/2/2017 6,500,200 40,879 5,110 3.55 6,500,200

5/31/2017 1,062,210 5,240 181 0.13 1,062,210 5/31/2017 358,890 2,350 81 0.06 358,890 5/31/2017 6,530,620 30,420 1,049 0.73 6,530,6206/5/2017 1,062,628 418 84 0.06 1,062,628 6/5/2017 359,070 180 36 0.03 359,070 6/5/2017 6,533,080 2,460 492 0.34 6,533,080

6/28/2017 1,062,800 172 7 0.01 1,062,800 6/28/2017 359,120 50 2 0.00 359,120 6/28/2017 6,533,430 350 15 0.01 6,533,4307/24/2017 1,062,840 40 2 0.00 1,062,840 7/24/2017 359,130 10 1 0.00 359,130 7/24/2017 6,533,500 70 3 0.00 6,533,5008/24/2017 1,062,893 53 2 0.00 1,062,893 8/24/2017 359,193 63 2 0.00 359,193 8/24/2017 6,534,561 1,061 1 0.00 6,534,5619/20/2017 1,063,362 469 1 0.00 1,063,362 9/20/2017 359,274 81 1 0.00 359,274 9/20/2017 6,536,010 1,449 1 0.00 6,536,01010/2/2017 1,063,363 1 1 0.00 1,063,363 10/2/2017 359,274 0 0 0.00 359,274 10/2/2017 6,536,010 0 0 0.00 6,536,010

10/23/2017 1,078,543 15,180 723 0.50 1,078,543 10/23/2017 366,730 7,456 355 0.25 366,730 10/23/2017 6,675,881 139,871 6,661 4.63 6,675,88111/8/2017 1,089,565 11,022 689 0.48 1,089,565 11/8/2017 372,368 5,638 352 0.24 372,368 11/8/2017 6,786,470 110,589 6,912 4.80 6,786,470

11/27/2017 1,090,201 636 33 0.02 1,090,201 11/27/2017 372,709 341 18 0.01 372,709 11/27/2017 6,787,411 941 50 0.03 6,787,41112/8/2017 1,097,873 7,672 697 0.48 1,097,873 12/8/2017 377,841 5,132 467 0.32 377,841 12/8/2017 6,845,503 58,092 5,281 3.67 6,845,503

12/27/2017 1,098,213 340 18 0.01 1,098,213 12/27/2017 378,091 250 13 0.01 378,091 12/27/2017 6,849,563 4,060 214 0.15 6,849,5631/9/2018 1,100,367 2,154 166 0.12 1,100,367 1/9/2018 379,077 986 76 0.05 379,077 1/9/2018 6,896,072 46,509 3,578 2.48 6,896,072

1/25/2018 1,107,987 7,620 476 0.33 1,107,987 1/25/2018 384,721 5,644 353 0.24 384,721 1/25/2018 6,934,722 38,650 2,416 1.68 6,934,7222/6/2018 1,113,715 5,728 477 0.33 1,113,715 2/6/2018 389,222 4,501 375 0.26 389,222 2/6/2018 6,963,841 29,119 2,427 1.69 6,963,841

2/19/2018 1,119,782 6,067 467 0.32 1,119,782 2/19/2018 395,740 6,518 501 0.35 395,740 2/19/2018 6,995,761 31,920 2,455 1.71 6,995,7613/3/2018 1,125,352 5,570 464 0.32 1,125,352 3/3/2018 400,651 4,911 409 0.28 400,651 3/3/2018 7,025,525 29,764 2,480 1.72 7,025,525

3/26/2018 1,136,632 11,280 490 0.34 1,136,632 3/26/2018 410,186 9,535 415 0.29 410,186 3/26/2018 7,084,436 58,911 2,561 1.78 7,084,4364/17/2018 1,147,299 10,667 485 0.34 1,147,299 4/17/2018 417,930 7,744 352 0.24 417,930 4/17/2018 7,140,442 56,006 2,546 1.77 7,140,4424/30/2018 1,153,752 6,453 496 0.34 1,153,752 4/30/2018 422,521 4,591 353 0.25 422,521 4/30/2018 7,173,655 33,213 2,555 1.77 7,173,6555/17/2018 1,162,314 8,562 504 0.35 1,162,314 5/17/2018 428,591 6,070 357 0.25 428,591 5/17/2018 7,218,342 44,687 2,629 1.83 7,218,3425/30/2018 1,169,032 6,718 517 0.36 1,169,032 5/30/2018 434,247 5,656 435 0.30 434,247 5/30/2018 7,251,620 33,278 2,560 1.78 7,251,6206/15/2018 1,177,436 8,404 525 0.36 1,177,436 6/15/2018 440,902 6,655 416 0.29 440,902 6/15/2018 7,293,004 41,384 2,587 1.80 7,293,0046/29/2018 1,185,101 7,665 548 0.38 1,185,101 6/29/2018 446,677 5,775 413 0.29 446,677 6/29/2018 7,330,065 37,061 2,647 1.84 7,330,0657/17/2018 1,194,730 9,629 535 0.37 1,194,730 7/17/2018 453,138 6,461 359 0.25 453,138 7/17/2018 7,378,425 48,360 2,687 1.87 7,378,4257/30/2018 1,201,575 6,845 527 0.37 1,201,575 7/30/2018 458,911 5,773 444 0.31 458,911 7/30/2018 7,413,713 35,288 2,714 1.89 7,413,7138/16/2018 1,211,465 9,890 582 0.40 1,211,465 8/16/2018 464,982 6,071 357 0.25 464,982 8/16/2018 7,461,343 47,630 2,802 1.95 7,461,3438/31/2018 1,220,291 8,826 588 0.41 1,220,291 8/31/2018 470,995 6,013 401 0.28 470,995 8/31/2018 7,504,402 43,059 2,871 1.99 7,504,402

** = data not available due to system startup on October 8, 2013 Flow restriction issues resulted in the inoperability of the pump in MW-9 from 1/28/14 through 5/6/14GPD - gallons-per-dayGPM- gallons-per-minute

Table 7Summary of Treatment System Analytical Results


Date

Ben

zene

Tolu

ene

Ethy

lben

zene

Xyle

nes

Tota

l BTE

X

MTB

E

Tert

-But

anol

TAM

E

TPH

-GR

O

Ben

zene

Tolu

ene

Ethy

lben

zene

Xyle

nes

Tota

l BTE

X

MTB

E

Tert

-But

anol

TAM

E

TPH

-GR

O

Ben

zene

Tolu

ene

Ethy

lben

zene

Xyle

nes

Tota

l BTE

X

MTB

E

Tert

-But

anol

TAM

E

TPH

-GR

O

Ben

zene

Tolu

ene

Ethy

lben

zene

Xyle

nes

Tota

l BTE

X

MTB

E

Tert

-But

anol

TAM

E

TPH

-GR

O

Units ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L10/17/13 ND@1 ND@1 ND@1 ND@3 ND 530 20 12 370 ND@1 ND@1 ND@1 ND@3 ND 1.2 30 ND@10 ND@100 ND@1 ND@1 ND@1 ND@3 ND ND@1 ND@20 ND@10 ND@100 ND@1 ND@1 ND@1 ND@3 ND ND@1 ND@20 ND@10 ND@10011/14/13 ND@1 ND@1 ND@1 ND@3 ND 390 22 ND@10 260 ND@1 ND@1 ND@1 ND@3 ND 2.0 ND@20 ND@10 ND@100 ND@1 ND@1 ND@1 ND@3 ND ND@1 ND@20 ND@10 ND@100 NS NS NS NS NS NS NS NS NS12/16/13 ND@1 ND@1 ND@1 ND@3 ND 140 ND@20 ND@10 160 ND@1 ND@1 ND@1 ND@3 ND 1.7 ND@20 ND@10 ND@100 ND@1 ND@1 ND@1 ND@3 ND ND@1 ND@20 ND@10 ND@100 ND@1 ND@1 ND@1 ND@3 ND ND@1 ND@20 ND@10 ND@1001/13/14 ND@1 ND@1 ND@1 ND@3 ND 230 ND@20 ND@10 230 ND@1 ND@1 ND@1 ND@3 ND 3.6 ND@20 ND@10 ND@100 ND@1 ND@1 ND@1 ND@3 ND ND@1 ND@20 ND@10 ND@100 ND@1 ND@1 ND@1 ND@3 ND ND@1 ND@20 ND@10 ND@1002/10/14 ND@1 ND@1 ND@1 ND@3 ND 8.8 ND@20 ND@10 120 ND@1 ND@1 ND@1 ND@3 ND 2.7 ND@20 ND@10 ND@100 ND@1 ND@1 ND@1 ND@3 ND ND@1 ND@20 ND@10 ND@100 NS NS NS NS NS NS NS NS NS3/11/14 ND@1 ND@1 ND@1 ND@3 ND 230 ND@20 ND@10 210 ND@1 ND@1 ND@1 ND@3 ND 2.4 ND@20 ND@10 ND@100 ND@1 ND@1 ND@1 ND@3 ND ND@1 ND@20 ND@10 ND@100 ND@1 ND@1 ND@1 ND@3 ND ND@1 ND@20 ND@10 ND@1004/8/14 ND@1 ND@1 ND@1 ND@3 ND 240 ND@20 ND@10 170 ND@1 ND@1 ND@1 ND@3 ND 1.6 ND@20 ND@10 ND@100 ND@1 ND@1 ND@1 ND@3 ND ND@1 ND@20 ND@10 ND@100 ND@1 ND@1 ND@1 ND@3 ND ND@1 ND@20 ND@10 ND@1005/7/14 ND@1 ND@1 ND@1 ND@3 ND 180 25 ND@10 260 ND@1 ND@1 ND@1 ND@3 ND ND@1 ND@20 ND@10 ND@100 ND@1 ND@1 ND@1 ND@3 ND ND@1 ND@20 ND@10 ND@100 ND@1 ND@1 ND@1 ND@3 ND ND@1 ND@20 ND@10 ND@1006/9/14 ND@1 ND@1 ND@1 ND@3 ND 180 ND@20 ND@10 180 ND@1 ND@1 ND@1 ND@3 ND ND@1 ND@20 ND@10 ND@100 ND@1 ND@1 ND@1 ND@3 ND ND@1 ND@20 ND@10 ND@100 ND@1 ND@1 ND@1 ND@3 ND ND@1 ND@20 ND@10 ND@1007/9/14 ND@1 ND@1 ND@1 ND@3 ND 110 ND@20 ND@10 100 ND@1 ND@1 ND@1 ND@3 ND ND@1 ND@20 ND@10 ND@100 ND@1 ND@1 ND@1 ND@3 ND ND@1 ND@20 ND@10 ND@100 ND@1 ND@1 ND@1 ND@3 ND ND@1 ND@20 ND@10 ND@1008/5/14 ND@1 ND@1 ND@1 ND@3 ND 85 ND@20 ND@10 ND@100 ND@1 ND@1 ND@1 ND@3 ND ND@1 ND@20 ND@10 ND@100 ND@1 ND@1 ND@1 ND@3 ND ND@1 ND@20 ND@10 ND@100 ND@1 ND@1 ND@1 ND@3 ND ND@1 ND@20 ND@10 ND@1009/2/14 ND@1 ND@1 ND@1 ND@3 ND 59 ND@20 ND@10 ND@100 ND@1 ND@1 ND@1 ND@3 ND ND@1 ND@20 ND@10 ND@100 ND@1 ND@1 ND@1 ND@3 ND ND@1 ND@20 ND@10 ND@100 ND@1 ND@1 ND@1 ND@3 ND ND@1 ND@20 ND@10 ND@100

10/13/14 ND@1 ND@1 ND@1 ND@3 ND 26 ND@20 ND@10 ND@100 ND@1 ND@1 ND@1 ND@3 ND ND@1 ND@20 ND@10 ND@100 ND@1 ND@1 ND@1 ND@3 ND ND@1 ND@20 ND@10 ND@100 ND@1 ND@1 ND@1 ND@3 ND ND@1 ND@20 ND@10 ND@10011/10/14 ND@1 ND@1 ND@1 ND@3 ND 26 ND@20 ND@10 ND@100 ND@1 ND@1 ND@1 ND@3 ND ND@1 ND@20 ND@10 ND@100 ND@1 ND@1 ND@1 ND@3 ND ND@1 ND@20 ND@10 ND@100 ND@1 ND@1 ND@1 ND@3 ND ND@1 ND@20 ND@10 ND@10012/3/14 ND@1 ND@1 ND@1 ND@3 ND 24 ND@20 ND@10 ND@100 ND@1 ND@1 ND@1 ND@3 ND ND@1 ND@20 ND@10 ND@100 ND@1 ND@1 ND@1 ND@3 ND ND@1 ND@20 ND@10 ND@100 ND@1 ND@1 ND@1 ND@3 ND ND@1 ND@20 ND@10 ND@1001/9/15 ND@1 ND@1 ND@1 ND@3 ND 24 ND@20 ND@10 ND@100 ND@1 ND@1 ND@1 ND@3 ND ND@1 ND@20 ND@10 ND@100 ND@1 ND@1 ND@1 ND@3 ND ND@1 ND@20 ND@10 ND@100 ND@1 ND@1 ND@1 ND@3 ND ND@1 ND@20 ND@10 ND@1002/13/15 ND@1 ND@1 ND@1 ND@3 ND 21 ND@20 ND@10 ND@100 ND@1 ND@1 ND@1 ND@3 ND ND@1 ND@20 ND@10 ND@100 ND@1 ND@1 ND@1 ND@3 ND ND@1 ND@20 ND@10 ND@100 ND@1 ND@1 ND@1 ND@3 ND ND@1 ND@20 ND@10 ND@1003/16/15 ND@1 ND@1 ND@1 ND@2 ND 20.7 ND@20 ND@10 ND@100 ND@1 ND@1 ND@1 ND@2 ND ND@1 ND@20 ND@10 ND@100 ND@1 ND@1 ND@1 ND@2 ND ND@1 ND@20 ND@10 ND@100 ND@1 ND@1 ND@1 ND@2 ND ND@1 NA NA ND@1004/7/15 ND@1 ND@1 ND@1 ND@2 ND 15.2 ND@20 ND@20 ND@100 ND@1 ND@1 ND@1 ND@2 ND ND@1 ND@20 ND@20 ND@100 ND@1 ND@1 ND@1 ND@2 ND ND@1 ND@20 ND@20 ND@100 ND@1 ND@1 ND@1 ND@2 ND ND@1 NA NA ND@1005/6/15 ND@1 ND@1 ND@1 ND@2 ND 15.8 ND@20 ND@20 ND@100 ND@1 ND@1 ND@1 ND@2 ND ND@1 ND@20 ND@20 ND@100 ND@1 ND@1 ND@1 ND@2 ND ND@1 ND@20 ND@20 ND@100 ND@1 ND@1 ND@1 ND@2 ND ND@1 NA NA ND@1006/9/15 ND@1 ND@1 ND@1 ND@3 ND 8.83 ND@10 ND@20 ND@100 ND@1 ND@1 ND@1 ND@3 ND ND@1 ND@10 ND@20 ND@100 ND@1 ND@1 ND@3 ND ND@1 ND@10 ND@20 ND@100 ND@100 ND@1 ND@1 ND@1 ND@3 ND ND@1 ND@10 ND@1 ND@1007/13/15 ND@1 ND@1 ND@1 ND@3 ND 5.08 ND@10 ND@20 ND@100 ND@1 ND@1 ND@1 ND@3 ND ND@1 ND@10 ND@20 ND@100 ND@1 ND@1 ND@3 ND ND@1 ND@10 ND@20 ND@100 ND@100 ND@1 ND@1 ND@1 ND@3 ND ND@1 ND@10 ND@1 ND@1008/6/15 ND@1 ND@1 ND@1 ND@3 ND 4.53 ND@10 ND@1 ND@100 NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS ND@1 ND@1 ND@1 ND@3 ND ND@1 ND@10 ND@1 ND@1009/23/15 ND@1 ND@1 ND@1 ND@3 ND 608 27.5 11.5 232 NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS10/7/15 ND@1 ND@1 ND@1 ND@3 ND 70.60 ND@10 ND@1 ND@100 ND@1 ND@1 ND@1 ND@3 ND ND@1 ND@10 ND@20 ND@100 ND@1 ND@1 ND@3 ND ND@1 ND@10 ND@20 ND@100 ND@100 ND@1 ND@1 ND@1 ND@3 ND ND@1 ND@10 ND@1 ND@100

10/20/15 NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS ND@1 ND@1 ND@1 ND@3 ND ND@1 ND@10 ND@1 ND@10011/2/15 ND@1 ND@1 ND@1 ND@3 ND 23.4 ND@10 ND@1 ND@100 ND@1 ND@1 ND@1 ND@3 ND ND@1 ND@10 ND@20 ND@100 ND@1 ND@1 ND@3 ND ND@1 ND@10 17.4 ND@100 ND@100 ND@1 ND@1 ND@1 ND@3 ND ND@1 ND@10 ND@1 ND@10012/2/15 ND@1 ND@1 ND@1 ND@3 ND 8.69 ND@10 ND@1 ND@100 ND@1 ND@1 ND@1 ND@3 ND ND@1 ND@10 ND@20 ND@100 ND@1 ND@1 ND@3 ND ND@1 ND@10 17.4 ND@100 ND@100 NS NS NS NS NS NS NS NS NS

12/16/15 NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS ND@1 ND@1 ND@1 ND@3 ND ND@1 ND@10 ND@1 ND@1001/8/16 ND@1 ND@1 ND@1 ND@3 ND 6.34 ND@10 ND@1 ND@100 ND@1 ND@1 ND@1 ND@3 ND ND@1 ND@10 ND@20 ND@100 ND@1 ND@1 ND@1 ND@3 ND ND@1 ND@10 ND@1 ND@100 ND@1 ND@1 ND@1 ND@3 ND ND@1 ND@10 ND@1 ND@1001/20/16 NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS ND@1 ND@1 ND@1 ND@3 ND ND@1 NA NA NA2/4/16 NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS ND@1 ND@1 ND@1 ND@3 ND ND@1 NA NA ND@1002/16/16 ND@1 ND@1 ND@1 ND@3 ND 139 ND@10 3.02 116 ND@1 ND@1 ND@1 ND@3 ND 6.38 ND@10 ND@1 ND@100 ND@1 ND@1 ND@1 ND@3 ND ND@1 ND@10 ND@1 ND@100 ND@1 ND@1 ND@1 ND@3 ND ND@1 NA NA ND@1003/4/16 ND@1 ND@1 ND@1 ND@3 ND 6.55 ND@10 ND@1 ND@100 ND@1 ND@1 ND@1 ND@3 ND ND@1 ND@10 ND@1 ND@100 ND@1 ND@1 ND@1 ND@3 ND ND@1 ND@10 ND@1 ND@100 ND@1 ND@1 ND@1 ND@3 ND ND@1 NA NA ND@1003/16/16 ND@1 ND@1 ND@1 ND@3 ND 75.8 ND@10 1.79 ND@100 ND@1 ND@1 ND@1 ND@3 ND 3.75 ND@10 ND@1 ND@100 ND@1 ND@1 ND@1 ND@3 ND ND@1 ND@10 ND@1 ND@100 ND@1 ND@1 ND@1 ND@3 ND ND@1 ND@10 ND@1 ND@1004/4/16 ND@1 ND@1 ND@1 ND@3 ND 3.5 ND@10 ND@1 ND@100 ND@1 ND@1 ND@1 ND@3 ND ND@1 ND@10 ND@1 ND@100 ND@1 ND@1 ND@1 ND@3 ND ND@1 ND@10 ND@1 ND@100 ND@1 ND@1 ND@1 ND@3 ND ND@1 ND@10 ND@1 ND@1004/20/16 ND@1 ND@1 ND@1 ND@3 ND ND@1 ND@10 ND@1 ND@100 ND@1 ND@1 ND@1 ND@3 ND ND@1 ND@10 ND@1 ND@100 ND@1 ND@1 ND@1 ND@3 ND ND@1 ND@10 ND@1 ND@100 ND@1 ND@1 ND@1 ND@3 ND ND@1 ND@10 ND@1 ND@1005/5/16 ND@1 ND@1 ND@1 ND@3 ND 3.6 13.8 ND@1 ND@100 ND@1 ND@1 ND@1 ND@3 ND ND@1 ND@10 ND@1 ND@100 ND@1 ND@1 ND@1 ND@3 ND ND@1 ND@10 ND@1 ND@100 ND@1 ND@1 ND@1 ND@3 ND ND@1 ND@10 ND@1 ND@1005/19/16 ND@1 ND@1 ND@1 ND@3 ND 23 ND@10 ND@1 ND@100 ND@1 ND@1 ND@1 ND@3 ND ND@1 ND@10 ND@1 ND@100 ND@1 ND@1 ND@1 ND@3 ND ND@1 ND@10 ND@1 ND@100 ND@1 ND@1 ND@1 ND@3 ND ND@1 ND@10 ND@1 ND@1006/2/16 ND@1 ND@1 ND@1 ND@3 ND 3 ND@10 ND@1 ND@100 ND@1 ND@1 ND@1 ND@3 ND ND@1 ND@10 ND@1 ND@100 ND@1 ND@1 ND@1 ND@3 ND ND@1 ND@10 ND@1 ND@100 ND@1 ND@1 ND@1 ND@3 ND ND@1 ND@10 ND@1 ND@1006/14/16 ND@1 ND@1 ND@1 ND@3 ND ND@1 ND@10 ND@1 ND@100 ND@1 ND@1 ND@1 ND@3 ND ND@1 ND@10 ND@1 ND@100 ND@1 ND@1 ND@1 ND@3 ND ND@1 ND@10 ND@1 ND@100 ND@1 ND@1 ND@1 ND@3 ND ND@1 ND@10 ND@1 ND@1007/1/16 ND@1 ND@1 ND@1 ND@3 ND 1.34 ND@10 ND@1 ND@100 ND@1 ND@1 ND@1 ND@3 ND ND@1 ND@10 ND@1 ND@100 ND@1 ND@1 ND@1 ND@3 ND ND@1 ND@10 ND@1 ND@100 ND@1 ND@1 ND@1 ND@3 ND ND@1 NA NA ND@1007/14/16 ND@1 ND@1 ND@1 ND@3 ND ND@1 ND@10 ND@1 ND@100 ND@1 ND@1 ND@1 ND@3 ND ND@1 ND@10 ND@1 ND@100 ND@1 ND@1 ND@1 ND@3 ND ND@1 ND@10 ND@1 ND@100 ND@1 ND@1 ND@1 ND@3 ND ND@1 NA NA ND@1008/1/16 ND@1 ND@1 ND@1 ND@3 ND 1.84 ND@10 ND@1 ND@100 ND@1 ND@1 ND@1 ND@3 ND ND@1 ND@10 ND@1 ND@100 ND@1 ND@1 ND@1 ND@3 ND ND@1 ND@10 ND@1 ND@100 ND@1 ND@1 ND@1 ND@3 ND ND@1 NA NA ND@1008/16/16 ND@1 ND@1 ND@1 ND@3 ND ND@1 ND@10 ND@1 ND@100 ND@1 ND@1 ND@1 ND@3 ND ND@1 ND@10 ND@1 ND@100 ND@1 ND@1 ND@1 ND@3 ND ND@1 ND@10 ND@1 ND@100 ND@1 ND@1 ND@1 ND@3 ND ND@1 NA NA ND@1009/3/16 ND@1 ND@1 ND@1 ND@3 ND 16.9 ND@10 ND@1 ND@100 ND@1 ND@1 ND@1 ND@3 ND ND@1 ND@10 ND@1 ND@100 ND@1 ND@1 ND@1 ND@3 ND ND@1 ND@10 ND@1 ND@100 ND@1 ND@1 ND@1 ND@3 ND ND@1 NA NA ND@1009/16/16 ND@1 ND@1 ND@1 ND@3 ND ND@1 ND@10 ND@1 ND@100 ND@1 ND@1 ND@1 ND@3 ND ND@1 ND@10 ND@1 ND@100 ND@1 ND@1 ND@1 ND@3 ND ND@1 ND@10 ND@1 ND@100 ND@1 ND@1 ND@1 ND@3 ND ND@1 NA NA ND@10010/4/16 ND@1 ND@1 ND@1 ND@3 ND ND@1 ND@10 ND@1 ND@100 ND@1 ND@1 ND@1 ND@3 ND ND@1 ND@10 ND@1 ND@100 ND@1 ND@1 ND@1 ND@3 ND ND@1 ND@10 ND@1 ND@100 ND@1 ND@1 ND@1 ND@3 ND ND@1 NA NA ND@100

10/17/16 ND@1 ND@1 ND@1 ND@3 ND 1.62 ND@10 ND@1 ND@100 ND@1 ND@1 ND@1 ND@3 ND ND@1 ND@10 ND@1 ND@100 ND@1 ND@1 ND@1 ND@3 ND ND@1 ND@10 ND@1 ND@100 ND@1 ND@1 ND@1 ND@3 ND ND@1 NA NA ND@10011/1/16 ND@1 ND@1 ND@1 ND@3 ND ND@1 ND@10 ND@1 ND@100 ND@1 ND@1 ND@1 ND@3 ND ND@1 ND@10 ND@1 ND@100 ND@1 ND@1 ND@1 ND@3 ND ND@1 ND@10 ND@1 ND@100 ND@1 ND@1 ND@1 ND@3 ND ND@1 NA NA ND@100

11/21/16 ND@1 ND@1 ND@1 ND@3 ND ND@1 ND@10 ND@1 ND@100 ND@1 ND@1 ND@1 ND@3 ND ND@1 ND@10 ND@1 ND@100 ND@1 ND@1 ND@1 ND@3 ND ND@1 ND@10 ND@1 ND@100 ND@1 ND@1 ND@1 ND@3 ND ND@1 NA NA ND@10012/8/16 ND@1 ND@1 ND@1 ND@3 ND ND@1 ND@10 ND@1 ND@100 ND@1 ND@1 ND@1 ND@3 ND ND@1 ND@10 ND@1 ND@100 ND@1 ND@1 ND@1 ND@3 ND ND@1 ND@10 ND@1 ND@100 ND@1 ND@1 ND@1 ND@3 ND ND@1 NA NA ND@100

12/31/16 ND@1 ND@1 ND@1 ND@3 ND 6.94 ND@10 ND@1 ND@100 ND@1 ND@1 ND@1 ND@3 ND ND@1 ND@10 ND@1 ND@100 ND@1 ND@1 ND@1 ND@3 ND ND@1 ND@10 ND@1 ND@100 ND@1 ND@1 ND@1 ND@3 ND ND@1 NA NA ND@100

GAC 2 EffluentAir Stripper Influent Air Stripper Effluent GAC 1 Effluent

Page 1 of 2

Table 7Summary of Treatment System Analytical Results


Date

Ben

zene

Tolu

ene

Ethy

lben

zene

Xyle

nes

Tota

l BTE

X

MTB

E

Tert

-But

anol

TAM

E

TPH

-GR

O

Ben

zene

Tolu

ene

Ethy

lben

zene

Xyle

nes

Tota

l BTE

X

MTB

E

Tert

-But

anol

TAM

E

TPH

-GR

O

Ben

zene

Tolu

ene

Ethy

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zene

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GAC 2 EffluentAir Stripper Influent Air Stripper Effluent GAC 1 Effluent

1/11/17 ND@1 ND@1 ND@1 ND@3 ND 1.50 ND@10 ND@1 ND@100 ND@1 ND@1 ND@1 ND@3 ND ND@1 ND@10 ND@1 ND@100 ND@1 ND@1 ND@1 ND@3 ND ND@1 ND@10 ND@1 ND@100 ND@1 ND@1 ND@1 ND@3 ND ND@1 NA NA ND@1001/27/17 NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS ND@1 ND@1 ND@1 ND@3 ND ND@1 NA NA NA2/10/17 ND@1 ND@1 ND@1 ND@3 ND ND@1 ND@10 ND@1 ND@100 ND@1 ND@1 ND@1 ND@3 ND ND@1 ND@10 ND@1 ND@100 ND@1 ND@1 ND@1 ND@3 ND ND@1 ND@10 ND@1 ND@100 ND@1 ND@1 ND@1 ND@3 ND ND@1 NA NA ND@1002/28/17 ND@1 ND@1 ND@1 ND@3 ND ND@1 ND@10 ND@1 ND@100 ND@1 ND@1 ND@1 ND@3 ND ND@1 ND@10 ND@1 ND@100 ND@1 ND@1 ND@1 ND@3 ND ND@1 ND@10 ND@1 ND@100 ND@1 ND@1 ND@1 ND@3 ND ND@1 NA NA ND@1003/16/17 ND@1 ND@1 ND@1 ND@3 ND ND@1 ND@10 ND@1 ND@100 ND@1 ND@1 ND@1 ND@3 ND ND@1 ND@10 ND@1 ND@100 ND@1 ND@1 ND@1 ND@3 ND ND@1 ND@10 ND@1 ND@100 ND@1 ND@1 ND@1 ND@3 ND ND@1 NA NA ND@1003/29/17 ND@1 ND@1 ND@1 ND@3 ND ND@1 ND@10 ND@1 ND@100 ND@1 ND@1 ND@1 ND@3 ND ND@1 ND@10 ND@1 ND@100 ND@1 ND@1 ND@1 ND@3 ND ND@1 ND@10 ND@1 ND@100 ND@1 ND@1 ND@1 ND@3 ND ND@1 NA NA ND@1004/7/17 ND@1 ND@1 ND@1 ND@3 ND 1.63 ND@10 ND@1 ND@100 ND@1 ND@1 ND@1 ND@3 ND ND@1 ND@10 ND@1 ND@100 ND@1 ND@1 ND@1 ND@3 ND ND@1 ND@10 ND@1 ND@100 ND@1 ND@1 ND@1 ND@3 ND ND@1 NA NA ND@1004/24/17 ND@1 ND@1 ND@1 ND@3 ND ND@1 ND@10 ND@1 ND@100 ND@1 ND@1 ND@1 ND@3 ND ND@1 ND@10 ND@1 ND@100 ND@1 ND@1 ND@1 ND@3 ND ND@1 ND@10 ND@1 ND@100 ND@1 ND@1 ND@1 ND@3 ND ND@1 NA NA ND@1005/2/17 ND@1 ND@1 ND@1 ND@3 ND 2.43 ND@10 ND@1 ND@100 ND@1 ND@1 ND@1 ND@3 ND ND@1 ND@10 ND@1 ND@100 ND@1 ND@1 ND@1 ND@3 ND ND@1 ND@10 ND@1 ND@100 ND@1 ND@1 ND@1 ND@3 ND ND@1 NA NA ND@1005/24/17 ND@1 ND@1 ND@1 ND@3 ND 13.30 ND@10 ND@1 ND@100 ND@1 ND@1 ND@1 ND@3 ND ND@1 ND@10 ND@1 ND@100 ND@1 ND@1 ND@1 ND@3 ND ND@1 ND@10 ND@1 ND@100 ND@1 ND@1 ND@1 ND@3 ND ND@1 NA NA ND@1006/5/17 ND@1 ND@1 ND@1 ND@3 ND 13.90 ND@10 ND@1 ND@100 ND@1 ND@1 ND@1 ND@3 ND ND@1 ND@10 ND@1 ND@100 ND@1 ND@1 ND@1 ND@3 ND ND@1 ND@10 ND@1 ND@100 ND@1 ND@1 ND@1 ND@3 ND ND@1 NA NA ND@1006/28/17 ND@1 ND@1 ND@1 ND@3 ND 33.50 ND@10 ND@1 ND@100 ND@1 ND@1 ND@1 ND@3 ND ND@1 ND@10 ND@1 ND@100 ND@1 ND@1 ND@1 ND@3 ND ND@1 ND@10 ND@1 ND@100 ND@1 ND@1 ND@1 ND@3 ND ND@1 NA NA ND@1007/24/17 ND@1 ND@1 ND@1 ND@3 ND 42.90 NA NA ND@100 ND@1 ND@1 ND@1 ND@3 ND ND@1 NA NA ND@100 ND@1 ND@1 ND@1 ND@3 ND ND@1 NA NA ND@100 ND@1 ND@1 ND@1 ND@3 ND ND@1 NA NA ND@1008/24/17 ND@1 ND@1 ND@1 ND@3 ND 67.90 NA NA ND@100 ND@1 ND@1 ND@1 ND@3 ND ND@1 NA NA ND@100 ND@1 ND@1 ND@1 ND@3 ND ND@1 NA NA ND@100 ND@1 ND@1 ND@1 ND@3 ND ND@1 NA NA ND@1009/20/17 ND@1 ND@1 ND@1 ND@3 ND 68.20 NA NA ND@100 ND@1 ND@1 ND@1 ND@3 ND ND@1 NA NA ND@100 ND@1 ND@1 ND@1 ND@3 ND ND@1 NA NA ND@100 ND@1 ND@1 ND@1 ND@3 ND ND@1 NA NA ND@100

10/13/17 ND@1 ND@1 ND@1 ND@3 ND 8.21 NA NA ND@100 ND@1 ND@1 ND@1 ND@3 ND ND@1 NA NA ND@100 ND@1 ND@1 ND@1 ND@3 ND ND@1 NA NA ND@100 ND@1 ND@1 ND@1 ND@3 ND ND@1 NA NA ND@10010/23/17 ND@1 ND@1 ND@1 ND@3 ND 1.07 NA NA ND@100 ND@1 ND@1 ND@1 ND@3 ND ND@1 NA NA ND@100 ND@1 ND@1 ND@1 ND@3 ND ND@1 NA NA ND@100 ND@1 ND@1 ND@1 ND@3 ND ND@1 NA NA ND@10011/8/17 ND@1 ND@1 ND@1 ND@3 ND ND@1 NA NA ND@100 ND@1 ND@1 ND@1 ND@3 ND ND@1 NA NA ND@100 ND@1 ND@1 ND@1 ND@3 ND ND@1 NA NA ND@100 ND@1 ND@1 ND@1 ND@3 ND ND@1 NA NA ND@100

11/27/17 ND@1 ND@1 ND@1 ND@3 ND 34.80 NA NA ND@100 ND@1 ND@1 ND@1 ND@3 ND ND@1 NA NA ND@100 ND@1 ND@1 ND@1 ND@3 ND ND@1 NA NA ND@100 ND@1 ND@1 ND@1 ND@3 ND ND@1 NA NA ND@10012/8/17 ND@1 ND@1 ND@1 ND@3 ND 2.18 NA NA ND@100 ND@1 ND@1 ND@1 ND@3 ND ND@1 NA NA ND@100 ND@1 ND@1 ND@1 ND@3 ND ND@1 NA NA ND@100 ND@1 ND@1 ND@1 ND@3 ND ND@1 NA NA ND@100

12/26/17 ND@1 ND@1 ND@1 ND@3 ND 72.80 NA NA ND@100 ND@1 ND@1 ND@1 ND@3 ND 2.18 NA NA ND@100 ND@1 ND@1 ND@1 ND@3 ND ND@1 NA NA ND@100 ND@1 ND@1 ND@1 ND@3 ND ND@1 NA NA ND@1001/9/18 ND@1 ND@1 ND@1 ND@3 ND 95.20 NA NA ND@100 ND@1 ND@1 ND@1 ND@3 ND ND@1 NA NA ND@100 ND@1 ND@1 ND@1 ND@3 ND ND@1 NA NA ND@100 ND@1 ND@1 ND@1 ND@3 ND ND@1 NA NA ND@1001/25/18 ND@1 ND@1 ND@1 ND@3 ND ND@1 NA NA ND@100 ND@1 ND@1 ND@1 ND@3 ND ND@1 NA NA ND@100 ND@1 ND@1 ND@1 ND@3 ND ND@1 NA NA ND@100 ND@1 ND@1 ND@1 ND@3 ND ND@1 NA NA ND@1002/6/18 ND@1 ND@1 ND@1 ND@3 ND 27.30 NA NA ND@100 ND@1 ND@1 ND@1 ND@3 ND ND@1 NA NA ND@100 ND@1 ND@1 ND@1 ND@3 ND ND@1 NA NA ND@100 ND@1 ND@1 ND@1 ND@3 ND ND@1 NA NA ND@1002/19/18 ND@1 ND@1 ND@1 ND@3 ND ND@1 NA NA ND@100 ND@1 ND@1 ND@1 ND@3 ND ND@1 NA NA ND@100 ND@1 ND@1 ND@1 ND@3 ND ND@1 NA NA ND@100 ND@1 ND@1 ND@1 ND@3 ND ND@1 NA NA ND@1003/26/18 ND@1 ND@1 ND@1 ND@3 ND 7.38 NA NA ND@100 ND@1 ND@1 ND@1 ND@3 ND ND@1 NA NA ND@100 ND@1 ND@1 ND@1 ND@3 ND ND@1 NA NA ND@100 ND@1 ND@1 ND@1 ND@3 ND ND@1 NA NA ND@1004/17/18 ND@1 ND@1 ND@1 ND@3 ND 9.17 NA NA ND@100 ND@1 ND@1 ND@1 ND@3 ND ND@1 NA NA ND@100 ND@1 ND@1 ND@1 ND@3 ND ND@1 NA NA ND@100 ND@1 ND@1 ND@1 ND@3 ND ND@1 NA NA ND@1004/30/18 ND@1 ND@1 ND@1 ND@3 ND 16.90 NA NA ND@100 ND@1 ND@1 ND@1 ND@3 ND ND@1 NA NA ND@100 ND@1 ND@1 ND@1 ND@3 ND ND@1 NA NA ND@100 ND@1 ND@1 ND@1 ND@3 ND ND@1 NA NA ND@1005/17/18 ND@1 ND@1 ND@1 ND@3 ND 3.52 NA NA ND@100 ND@1 ND@1 ND@1 ND@3 ND ND@1 NA NA ND@100 ND@1 ND@1 ND@1 ND@3 ND ND@1 NA NA ND@100 ND@1 ND@1 ND@1 ND@3 ND ND@1 NA NA ND@1005/30/18 ND@1 ND@1 ND@1 ND@3 ND 6.23 NA NA ND@100 ND@1 ND@1 ND@1 ND@3 ND ND@1 NA NA ND@100 ND@1 ND@1 ND@1 ND@3 ND ND@1 NA NA ND@100 ND@1 ND@1 ND@1 ND@3 ND ND@1 NA NA ND@1006/15/18 ND@1 ND@1 ND@1 ND@3 ND 8.83 NA NA ND@100 ND@1 ND@1 ND@1 ND@3 ND ND@1 NA NA ND@100 ND@1 ND@1 ND@1 ND@3 ND ND@1 NA NA ND@100 ND@1 ND@1 ND@1 ND@3 ND ND@1 NA NA ND@1006/29/18 ND@1 ND@1 ND@1 ND@3 ND 12.90 NA NA ND@100 ND@1 ND@1 ND@1 ND@3 ND ND@1 NA NA ND@100 ND@1 ND@1 ND@1 ND@3 ND ND@1 NA NA ND@100 ND@1 ND@1 ND@1 ND@3 ND ND@1 NA NA ND@1007/17/18 ND@1 ND@1 ND@1 ND@3 ND 16.60 NA NA ND@100 ND@1 ND@1 ND@1 ND@3 ND ND@1 NA NA ND@100 ND@1 ND@1 ND@1 ND@3 ND ND@1 NA NA ND@100 ND@1 ND@1 ND@1 ND@3 ND ND@1 NA NA ND@1007/30/18 ND@1 ND@1 ND@1 ND@3 ND 11.20 NA NA ND@100 ND@1 ND@1 ND@1 ND@3 ND ND@1 NA NA ND@100 ND@1 ND@1 ND@1 ND@3 ND ND@1 NA NA ND@100 ND@1 ND@1 ND@1 ND@3 ND ND@1 NA NA ND@1008/11/18 ND@1 ND@1 ND@1 ND@3 ND 1.70 NA NA ND@100 ND@1 ND@1 ND@1 ND@3 ND ND@1 NA NA ND@100 ND@1 ND@1 ND@1 ND@3 ND ND@1 NA NA ND@100 ND@1 ND@1 ND@1 ND@3 ND ND@1 NA NA ND@1008/27/18 ND@1 ND@1 ND@1 ND@3 ND 9.58 NA NA ND@100 ND@1 ND@1 ND@1 ND@3 ND ND@1 NA NA ND@100 ND@1 ND@1 ND@1 ND@3 ND ND@1 NA NA ND@100 ND@1 ND@1 ND@1 ND@3 ND ND@1 NA NA ND@100

Notes:ug/L = Micrograms-per-liter TPH-GRO - total petroleum hydrocarbons-gasoline range organics MTBE - methyl-tert-butyl etherNS - not sampled BTEX - Benzene, toluene, ethylbenzene, total xylenes TAME - Tert-amyl methyl etherND@x - not detected above laboratory detection limit of "x"

Samples collected on 2/16/16 and 3/16/16 were collected after the system re-start as part of pulsing efforts in MW-8 and MW-9.

Samples collected on 9/23/2015 are indicated as GAC 2 Effluent samples on the COC; however, they are believed tobe influent samples based on the similar concentrations observed in the recovery wells on 9/23/2015.

Page 2 of 2

ATTACHMENT A

Laboratory Analytical Reports – Monitoring Wells, On-site Potable Well, and ResidentialTreatment Potable Well

ANALYTICAL REPORTTestAmerica Laboratories, Inc.TestAmerica Nashville2960 Foster Creighton DriveNashville, TN 37204Tel: (615)726-0177

TestAmerica Job ID: 490-169885-1TestAmerica SDG: 125 Hanover Pike, Hampstead, MDClient Project/Site: 32785.Hampstead.EL (MD)

For:AECOM8000 Virginia Manor RoadSuite 110Beltsville, Maryland 20705

Attn: Ms. Rachael Allen

Authorized for release by:3/13/2019 1:32:23 PMAndy Johnson, Manager of Project Management(615)[email protected]

Designee for

Jennifer Huckaba, Project Manager II(615)[email protected]

The test results in this report meet all 2003 NELAC and 2009 TNI requirements for accreditedparameters, exceptions are noted in this report. This report may not be reproduced except in full,and with written approval from the laboratory. For questions please contact the Project Managerat the e-mail address or telephone number listed on this page.

This report has been electronically signed and authorized by the signatory. Electronic signature isintended to be the legally binding equivalent of a traditionally handwritten signature.

Results relate only to the items tested and the sample(s) as received by the laboratory.

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https://secure.testamericainc.com/TotalAccess/login.aspx

http://www.testamericainc.com/AskTheExpert/Expert_index.htm

http://www.testamericainc.com

mailto:[email protected]


Table of Contents

Client: AECOMProject/Site: 32785.Hampstead.EL (MD)

TestAmerica Job ID: 490-169885-1SDG: 125 Hanover Pike, Hampstead, MD

Page 2 of 62TestAmerica Nashville

3/13/2019

Cover Page . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1

Table of Contents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2

Sample Summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

Case Narrative . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

Definitions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

Client Sample Results . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

QC Sample Results . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36

QC Association . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53

Chronicle . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55

Method Summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58

Certification Summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59

Chain of Custody . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 60

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Sample SummaryTestAmerica Job ID: 490-169885-1Client: AECOM

SDG: 125 Hanover Pike, Hampstead, MDProject/Site: 32785.Hampstead.EL (MD)

Lab Sample ID Client Sample ID ReceivedCollectedMatrix

490-169885-1 MW-1 Water 03/07/19 14:25 03/09/19 09:15

490-169885-2 MW-2 Water 03/07/19 11:50 03/09/19 09:15

490-169885-3 MW-3 Water 03/07/19 12:15 03/09/19 09:15

490-169885-4 MW-4 Water 03/07/19 13:00 03/09/19 09:15

490-169885-5 MW-5 Water 03/07/19 15:05 03/09/19 09:15

490-169885-6 MW-6 Water 03/07/19 15:35 03/09/19 09:15

490-169885-7 MW-7 Water 03/07/19 15:00 03/09/19 09:15

490-169885-8 MW-8 Water 03/07/19 13:25 03/09/19 09:15

490-169885-9 MW-9 Water 03/07/19 13:27 03/09/19 09:15

490-169885-10 MW-10 Water 03/07/19 13:30 03/09/19 09:15

490-169885-11 7-11 Potable (P.O.U) Water 03/07/19 15:00 03/09/19 09:15

490-169885-12 124 Hanover INF Water 03/07/19 12:55 03/09/19 09:15

490-169885-13 124 Hanover GAC-1 EFF Water 03/07/19 12:52 03/09/19 09:15


490-169885-15 124 Hanover FINAL EFF Water 03/07/19 12:45 03/09/19 09:15

TestAmerica Nashville

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Case NarrativeClient: AECOM TestAmerica Job ID: 490-169885-1Project/Site: 32785.Hampstead.EL (MD) SDG: 125 Hanover Pike, Hampstead, MD

Job ID: 490-169885-1

Laboratory: TestAmerica Nashville

Narrative

Job Narrative490-169885-1

Comments

No additional comments.

Receipt

The samples were received on 3/9/2019 9:15 AM; the samples arrived in good condition, properly preserved and, where required, on ice.

The temperature of the cooler at receipt was 2.0º C.

GC/MS VOA Method(s) 524.2: The laboratory control sample (LCS) and / or laboratory control sample duplicate (LCSD) for analytical batch 490-579919

recovered outside control limits for the following analytes: Dichlorodifluoromethane. These analytes were biased high in the LCS and

were not detected in the associated samples; therefore, the data have been reported.

Method(s) 8260B: The laboratory control sample (LCS) for analytical batch 490-580333 recovered outside control limits for the following analytes: Bromoform, 2-Hexanone, 1,1,2,2-Tetrachloroethane, 4-Methyl-2-pentanone (MIBK) and Methyl acetate. These analytes were biased high in the LCS and were not detected in the associated samples; therefore, the data have been reported.

Method(s) 8260B: Internal standard responses were outside of acceptance limits for the following samples: MW-9 (490-169885-9) and MW-10 (490-169885-10). Analyte associated with failing internal standard was not reported.

No additional analytical or quality issues were noted, other than those described above or in the Definitions/Glossary page.

GC VOA Method(s) 8015B GRO LL: Insufficient sample volume was available to perform a matrix spike/matrix spike duplicate/sample duplicate (MS/MSD/DUP) associated with analytical batch 490-579978.


VOA Prep No analytical or quality issues were noted, other than those described in the Definitions/Glossary page.

TestAmerica NashvillePage 4 of 62 3/13/2019

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Definitions/GlossaryTestAmerica Job ID: 490-169885-1Client: AECOM


Qualifiers

GC/MS VOA

Qualifier Description

4 MS, MSD: The analyte present in the original sample is greater than 4 times the matrix spike concentration; therefore, control limits are not

applicable.

Qualifier

F2 MS/MSD RPD exceeds control limits

F1 MS and/or MSD Recovery is outside acceptance limits.

* LCS or LCSD is outside acceptance limits.

J Result is less than the RL but greater than or equal to the MDL and the concentration is an approximate value.

Glossary

These commonly used abbreviations may or may not be present in this report.

¤ Listed under the "D" column to designate that the result is reported on a dry weight basis

Abbreviation

%R Percent Recovery

CFL Contains Free Liquid

CNF Contains No Free Liquid

DER Duplicate Error Ratio (normalized absolute difference)

Dil Fac Dilution Factor

DL Detection Limit (DoD/DOE)

DL, RA, RE, IN Indicates a Dilution, Re-analysis, Re-extraction, or additional Initial metals/anion analysis of the sample

DLC Decision Level Concentration (Radiochemistry)

EDL Estimated Detection Limit (Dioxin)

LOD Limit of Detection (DoD/DOE)

LOQ Limit of Quantitation (DoD/DOE)

MDA Minimum Detectable Activity (Radiochemistry)

MDC Minimum Detectable Concentration (Radiochemistry)

MDL Method Detection Limit

ML Minimum Level (Dioxin)

NC Not Calculated

ND Not Detected at the reporting limit (or MDL or EDL if shown)

PQL Practical Quantitation Limit

QC Quality Control

RER Relative Error Ratio (Radiochemistry)

RL Reporting Limit or Requested Limit (Radiochemistry)

RPD Relative Percent Difference, a measure of the relative difference between two points

TEF Toxicity Equivalent Factor (Dioxin)

TEQ Toxicity Equivalent Quotient (Dioxin)


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Client Sample ResultsTestAmerica Job ID: 490-169885-1Client: AECOM


Lab Sample ID: 490-169885-1Client Sample ID: MW-1Matrix: WaterDate Collected: 03/07/19 14:25

Date Received: 03/09/19 09:15

Method: 8260B - Volatile Organic Compounds (GC/MS)RL MDL

Acetone ND 25.0 ug/L 03/12/19 15:10 1

Analyte Dil FacAnalyzedPreparedUnit DResult Qualifier

1.00 ug/L 03/12/19 15:10 1Benzene ND

1.00 ug/L 03/12/19 15:10 1Bromochloromethane ND

1.00 ug/L 03/12/19 15:10 1Bromodichloromethane ND

1.00 ug/L 03/12/19 15:10 1Bromoform ND *

1.00 ug/L 03/12/19 15:10 1Bromomethane ND

50.0 ug/L 03/12/19 15:10 12-Butanone (MEK) ND

1.00 ug/L 03/12/19 15:10 1Carbon disulfide ND

1.00 ug/L 03/12/19 15:10 1Carbon tetrachloride ND

1.00 ug/L 03/12/19 15:10 1Chlorobenzene ND

1.00 ug/L 03/12/19 15:10 1Chlorodibromomethane ND

1.00 ug/L 03/12/19 15:10 1Chloroethane ND

1.00 ug/L 03/12/19 15:10 1Chloroform ND

1.00 ug/L 03/12/19 15:10 1Chloromethane ND

1.00 ug/L 03/12/19 15:10 1cis-1,2-Dichloroethene ND

1.00 ug/L 03/12/19 15:10 1cis-1,3-Dichloropropene ND

5.00 ug/L 03/12/19 15:10 1Cyclohexane ND

10.0 ug/L 03/12/19 15:10 11,2-Dibromo-3-Chloropropane ND

1.00 ug/L 03/12/19 15:10 11,2-Dibromoethane (EDB) ND

1.00 ug/L 03/12/19 15:10 11,2-Dichlorobenzene ND



1.00 ug/L 03/12/19 15:10 1Dichlorodifluoromethane ND

1.00 ug/L 03/12/19 15:10 11,1-Dichloroethane ND


1.00 ug/L 03/12/19 15:10 11,1-Dichloroethene ND

1.00 ug/L 03/12/19 15:10 11,2-Dichloropropane ND

2.00 ug/L 03/12/19 15:10 1Diisopropyl ether ND

1.00 ug/L 03/12/19 15:10 1Ethylbenzene ND

1.00 ug/L 03/12/19 15:10 1Ethyl tert-butyl ether ND

1.00 ug/L 03/12/19 15:10 1Freon 113 ND

10.0 ug/L 03/12/19 15:10 12-Hexanone ND *

1.00 ug/L 03/12/19 15:10 1Isopropylbenzene ND

10.0 ug/L 03/12/19 15:10 1Methyl acetate ND *

5.00 ug/L 03/12/19 15:10 1Methylcyclohexane ND

5.00 ug/L 03/12/19 15:10 1Methylene Chloride ND

10.0 ug/L 03/12/19 15:10 14-Methyl-2-pentanone (MIBK) ND *

1.00 ug/L 03/12/19 15:10 1Methyl tert-butyl ether ND

5.00 ug/L 03/12/19 15:10 1Naphthalene ND

1.00 ug/L 03/12/19 15:10 1Styrene ND

1.00 ug/L 03/12/19 15:10 1Tert-amyl methyl ether ND

10.0 ug/L 03/12/19 15:10 1tert-Butyl alcohol (TBA) ND

1.00 ug/L 03/12/19 15:10 11,1,2,2-Tetrachloroethane ND *

1.00 ug/L 03/12/19 15:10 1Tetrachloroethene ND

1.00 ug/L 03/12/19 15:10 1Toluene ND

1.00 ug/L 03/12/19 15:10 1trans-1,2-Dichloroethene ND

1.00 ug/L 03/12/19 15:10 1trans-1,3-Dichloropropene ND

1.00 ug/L 03/12/19 15:10 11,2,3-Trichlorobenzene ND



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Method: 8260B - Volatile Organic Compounds (GC/MS) (Continued)RL MDL

1,1,1-Trichloroethane ND 1.00 ug/L 03/12/19 15:10 1


1.00 ug/L 03/12/19 15:10 11,1,2-Trichloroethane ND

1.00 ug/L 03/12/19 15:10 1Trichloroethene ND

1.00 ug/L 03/12/19 15:10 1Trichlorofluoromethane ND

1.00 ug/L 03/12/19 15:10 1Vinyl chloride ND

2.00 ug/L 03/12/19 15:10 1m,p-Xylene ND

1.00 ug/L 03/12/19 15:10 1o-Xylene ND

3.00 ug/L 03/12/19 15:10 1Xylenes, Total ND

4-Bromofluorobenzene (Surr) 98 70 - 130 03/12/19 15:10 1

Surrogate Dil FacAnalyzedPreparedQualifier Limits%Recovery

Dibromofluoromethane (Surr) 92 03/12/19 15:10 170 - 130

1,2-Dichloroethane-d4 (Surr) 104 03/12/19 15:10 170 - 130

Toluene-d8 (Surr) 99 03/12/19 15:10 170 - 130

Method: 8015B GRO LL - Gasoline Range Organics - (GC)RL MDL

Gasoline Range Organics [C6 - C10] ND 20.0 ug/L 03/11/19 18:50 1


a,a,a-Trifluorotoluene 102 50 - 150 03/11/19 18:50 1



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Acetone ND 25.0 ug/L 03/12/19 15:37 1


1.00 ug/L 03/12/19 15:37 1Benzene ND



1.00 ug/L 03/12/19 15:37 1Bromoform ND *


























1.00 ug/L 03/12/19 15:37 1Freon 113 ND

10.0 ug/L 03/12/19 15:37 12-Hexanone ND *








1.00 ug/L 03/12/19 15:37 1Styrene ND





1.00 ug/L 03/12/19 15:37 1Toluene ND






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2.00 ug/L 03/12/19 15:37 1m,p-Xylene ND

1.00 ug/L 03/12/19 15:37 1o-Xylene ND






Toluene-d8 (Surr) 101 03/12/19 15:37 170 - 130







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Acetone ND 25.0 ug/L 03/12/19 16:04 1


1.00 ug/L 03/12/19 16:04 1Benzene ND



1.00 ug/L 03/12/19 16:04 1Bromoform ND *


























1.00 ug/L 03/12/19 16:04 1Freon 113 ND

10.0 ug/L 03/12/19 16:04 12-Hexanone ND *








1.00 ug/L 03/12/19 16:04 1Styrene ND





1.00 ug/L 03/12/19 16:04 1Toluene ND






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2.00 ug/L 03/12/19 16:04 1m,p-Xylene ND

1.00 ug/L 03/12/19 16:04 1o-Xylene ND






Toluene-d8 (Surr) 102 03/12/19 16:04 170 - 130







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Acetone ND 25.0 ug/L 03/12/19 16:31 1


1.00 ug/L 03/12/19 16:31 1Benzene ND



1.00 ug/L 03/12/19 16:31 1Bromoform ND *


























1.00 ug/L 03/12/19 16:31 1Freon 113 ND

10.0 ug/L 03/12/19 16:31 12-Hexanone ND *








1.00 ug/L 03/12/19 16:31 1Styrene ND





1.00 ug/L 03/12/19 16:31 1Toluene ND






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2.00 ug/L 03/12/19 16:31 1m,p-Xylene ND

1.00 ug/L 03/12/19 16:31 1o-Xylene ND






Toluene-d8 (Surr) 95 03/12/19 16:31 170 - 130







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Acetone ND 25.0 ug/L 03/12/19 16:57 1


1.00 ug/L 03/12/19 16:57 1Benzene ND



1.00 ug/L 03/12/19 16:57 1Bromoform ND *


























1.00 ug/L 03/12/19 16:57 1Freon 113 ND

10.0 ug/L 03/12/19 16:57 12-Hexanone ND *








1.00 ug/L 03/12/19 16:57 1Styrene ND





1.00 ug/L 03/12/19 16:57 1Toluene ND






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2.00 ug/L 03/12/19 16:57 1m,p-Xylene ND

1.00 ug/L 03/12/19 16:57 1o-Xylene ND






Toluene-d8 (Surr) 98 03/12/19 16:57 170 - 130







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Acetone ND 25.0 ug/L 03/12/19 17:24 1


1.00 ug/L 03/12/19 17:24 1Benzene ND



1.00 ug/L 03/12/19 17:24 1Bromoform ND *


























1.00 ug/L 03/12/19 17:24 1Freon 113 ND

10.0 ug/L 03/12/19 17:24 12-Hexanone ND *








1.00 ug/L 03/12/19 17:24 1Styrene ND





1.00 ug/L 03/12/19 17:24 1Toluene ND






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2.00 ug/L 03/12/19 17:24 1m,p-Xylene ND

1.00 ug/L 03/12/19 17:24 1o-Xylene ND






Toluene-d8 (Surr) 100 03/12/19 17:24 170 - 130







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Acetone ND 25.0 ug/L 03/12/19 17:50 1


1.00 ug/L 03/12/19 17:50 1Benzene ND



1.00 ug/L 03/12/19 17:50 1Bromoform ND *


























1.00 ug/L 03/12/19 17:50 1Freon 113 ND

10.0 ug/L 03/12/19 17:50 12-Hexanone ND *








1.00 ug/L 03/12/19 17:50 1Styrene ND




1.00 ug/L 03/12/19 17:50 1Tetrachloroethene 21.8

1.00 ug/L 03/12/19 17:50 1Toluene ND






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2.00 ug/L 03/12/19 17:50 1m,p-Xylene ND

1.00 ug/L 03/12/19 17:50 1o-Xylene ND






Toluene-d8 (Surr) 100 03/12/19 17:50 170 - 130







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Acetone ND 25.0 ug/L 03/12/19 18:17 1


1.00 ug/L 03/12/19 18:17 1Benzene ND



1.00 ug/L 03/12/19 18:17 1Bromoform ND *


























1.00 ug/L 03/12/19 18:17 1Freon 113 ND

10.0 ug/L 03/12/19 18:17 12-Hexanone ND *






1.00 ug/L 03/12/19 18:17 1Methyl tert-butyl ether 68.5


1.00 ug/L 03/12/19 18:17 1Styrene ND

1.00 ug/L 03/12/19 18:17 1Tert-amyl methyl ether 1.30




1.00 ug/L 03/12/19 18:17 1Toluene ND






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2.00 ug/L 03/12/19 18:17 1m,p-Xylene ND

1.00 ug/L 03/12/19 18:17 1o-Xylene ND






Toluene-d8 (Surr) 94 03/12/19 18:17 170 - 130


Gasoline Range Organics [C6 - C10]

111 20.0 ug/L 03/11/19 22:57 1





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Acetone ND 25.0 ug/L 03/12/19 18:43 1


1.00 ug/L 03/12/19 18:43 1Benzene ND



1.00 ug/L 03/12/19 18:43 1Bromoform ND *


























1.00 ug/L 03/12/19 18:43 1Freon 113 ND

10.0 ug/L 03/12/19 18:43 12-Hexanone ND *








1.00 ug/L 03/12/19 18:43 1Styrene ND





1.00 ug/L 03/12/19 18:43 1Toluene ND






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2.00 ug/L 03/12/19 18:43 1m,p-Xylene ND

1.00 ug/L 03/12/19 18:43 1o-Xylene ND




4-Bromofluorobenzene (Surr) 94 03/12/19 18:43 170 - 130





Toluene-d8 (Surr) 108 03/10/19 00:27 170 - 130

Toluene-d8 (Surr) 104 03/12/19 18:43 170 - 130







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Acetone ND 25.0 ug/L 03/12/19 19:09 1


1.00 ug/L 03/12/19 19:09 1Benzene ND



1.00 ug/L 03/12/19 19:09 1Bromoform ND *


























1.00 ug/L 03/12/19 19:09 1Freon 113 ND

10.0 ug/L 03/12/19 19:09 12-Hexanone ND *








1.00 ug/L 03/12/19 19:09 1Styrene ND





1.00 ug/L 03/12/19 19:09 1Toluene ND






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2.00 ug/L 03/12/19 19:09 1m,p-Xylene ND

1.00 ug/L 03/12/19 19:09 1o-Xylene ND




4-Bromofluorobenzene (Surr) 98 03/12/19 19:09 170 - 130





Toluene-d8 (Surr) 107 03/10/19 00:54 170 - 130

Toluene-d8 (Surr) 100 03/12/19 19:09 170 - 130







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Lab Sample ID: 490-169885-11Client Sample ID: 7-11 Potable (P.O.U)Matrix: WaterDate Collected: 03/07/19 15:00


Method: 524.2 - Volatile Organic Compounds (GC/MS)RL MDL

Benzene ND 0.500 ug/L 03/09/19 19:53 1


0.500 ug/L 03/09/19 19:53 1Bromobenzene ND



0.500 ug/L 03/09/19 19:53 1Bromoform ND









0.500 ug/L 03/09/19 19:53 12-Chlorotoluene ND






0.500 ug/L 03/09/19 19:53 1Dibromomethane ND




0.500 ug/L 03/09/19 19:53 1Dichlorodifluoromethane ND *







0.500 ug/L 03/09/19 19:53 11,1-Dichloropropene ND




0.500 ug/L 03/09/19 19:53 1Hexachlorobutadiene ND





0.500 ug/L 03/09/19 19:53 1n-Butylbenzene ND

0.500 ug/L 03/09/19 19:53 1N-Propylbenzene ND

0.500 ug/L 03/09/19 19:53 1p-Isopropyltoluene ND

0.500 ug/L 03/09/19 19:53 1sec-Butylbenzene ND

0.500 ug/L 03/09/19 19:53 1Styrene ND


10.0 ug/L 03/09/19 19:53 1tert-Butyl alcohol ND

0.500 ug/L 03/09/19 19:53 1tert-Butylbenzene ND

0.500 ug/L 03/09/19 19:53 11,1,1,2-Tetrachloroethane ND



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Lab Sample ID: 490-169885-11Client Sample ID: 7-11 Potable (P.O.U)Matrix: WaterDate Collected: 03/07/19 15:00


Method: 524.2 - Volatile Organic Compounds (GC/MS) (Continued)RL MDL

Tetrachloroethene ND 0.500 ug/L 03/09/19 19:53 1


0.500 ug/L 03/09/19 19:53 1Toluene ND









0.500 ug/L 03/09/19 19:53 11,2,3-Trichloropropane ND

0.500 ug/L 03/09/19 19:53 11,2,4-Trimethylbenzene ND








Toluene-d8 (Surr) 100 03/09/19 19:53 170 - 130


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Lab Sample ID: 490-169885-12Client Sample ID: 124 Hanover INFMatrix: WaterDate Collected: 03/07/19 12:55



Benzene ND 0.500 ug/L 03/09/19 22:59 1





0.500 ug/L 03/09/19 22:59 1Bromoform ND







































0.500 ug/L 03/09/19 22:59 1Styrene ND







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0.500 ug/L 03/09/19 22:59 1Toluene ND


















Toluene-d8 (Surr) 105 03/09/19 22:59 170 - 130


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Lab Sample ID: 490-169885-13Client Sample ID: 124 Hanover GAC-1 EFFMatrix: WaterDate Collected: 03/07/19 12:52



Benzene ND 0.500 ug/L 03/09/19 22:32 1





0.500 ug/L 03/09/19 22:32 1Bromoform ND







































0.500 ug/L 03/09/19 22:32 1Styrene ND







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0.500 ug/L 03/09/19 22:32 1Toluene ND


















Toluene-d8 (Surr) 104 03/09/19 22:32 170 - 130


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Benzene ND 0.500 ug/L 03/09/19 22:06 1





0.500 ug/L 03/09/19 22:06 1Bromoform ND







































0.500 ug/L 03/09/19 22:06 1Styrene ND







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0.500 ug/L 03/09/19 22:06 1Toluene ND


















Toluene-d8 (Surr) 100 03/09/19 22:06 170 - 130


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Lab Sample ID: 490-169885-15Client Sample ID: 124 Hanover FINAL EFFMatrix: WaterDate Collected: 03/07/19 12:45



Benzene ND 0.500 ug/L 03/09/19 21:40 1





0.500 ug/L 03/09/19 21:40 1Bromoform ND







































0.500 ug/L 03/09/19 21:40 1Styrene ND







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Lab Sample ID: 490-169885-15Client Sample ID: 124 Hanover FINAL EFFMatrix: WaterDate Collected: 03/07/19 12:45





0.500 ug/L 03/09/19 21:40 1Toluene ND


















Toluene-d8 (Surr) 105 03/09/19 21:40 170 - 130


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QC Sample ResultsTestAmerica Job ID: 490-169885-1Client: AECOM


Method: 524.2 - Volatile Organic Compounds (GC/MS)

Client Sample ID: Method BlankLab Sample ID: MB 490-579919/7Matrix: Water Prep Type: Total/NAAnalysis Batch: 579919

RL MDL

Benzene ND 0.500 ug/L 03/09/19 17:12 1

MB MB

Analyte Dil FacAnalyzedPreparedDUnitResult Qualifier

ND 0.500 ug/L 03/09/19 17:12 1Bromobenzene

ND 0.500 ug/L 03/09/19 17:12 1Bromochloromethane

ND 0.500 ug/L 03/09/19 17:12 1Bromodichloromethane

ND 0.500 ug/L 03/09/19 17:12 1Bromoform

ND 0.500 ug/L 03/09/19 17:12 1Bromomethane

ND 0.500 ug/L 03/09/19 17:12 1Carbon disulfide

ND 0.500 ug/L 03/09/19 17:12 1Carbon tetrachloride

ND 0.500 ug/L 03/09/19 17:12 1Chlorobenzene

ND 0.500 ug/L 03/09/19 17:12 1Chlorodibromomethane

ND 0.500 ug/L 03/09/19 17:12 1Chloroethane

ND 0.500 ug/L 03/09/19 17:12 1Chloroform

ND 0.500 ug/L 03/09/19 17:12 1Chloromethane

ND 0.500 ug/L 03/09/19 17:12 12-Chlorotoluene


ND 0.500 ug/L 03/09/19 17:12 1cis-1,2-Dichloroethene

ND 0.500 ug/L 03/09/19 17:12 1cis-1,3-Dichloropropene

ND 2.00 ug/L 03/09/19 17:12 11,2-Dibromo-3-Chloropropane

ND 0.500 ug/L 03/09/19 17:12 11,2-Dibromoethane (EDB)

ND 0.500 ug/L 03/09/19 17:12 1Dibromomethane

ND 0.500 ug/L 03/09/19 17:12 11,2-Dichlorobenzene



ND 0.500 ug/L 03/09/19 17:12 1Dichlorodifluoromethane

ND 0.500 ug/L 03/09/19 17:12 11,1-Dichloroethane


ND 0.500 ug/L 03/09/19 17:12 11,1-Dichloroethene

ND 0.500 ug/L 03/09/19 17:12 11,2-Dichloropropane



ND 0.500 ug/L 03/09/19 17:12 11,1-Dichloropropene

ND 0.500 ug/L 03/09/19 17:12 1Diisopropyl ether

ND 0.500 ug/L 03/09/19 17:12 1Ethylbenzene

ND 0.500 ug/L 03/09/19 17:12 1Ethyl tert-butyl ether

ND 0.500 ug/L 03/09/19 17:12 1Hexachlorobutadiene

ND 0.500 ug/L 03/09/19 17:12 1Isopropylbenzene

ND 5.00 ug/L 03/09/19 17:12 1Methylene Chloride

ND 0.500 ug/L 03/09/19 17:12 1Methyl tert-butyl ether

ND 5.00 ug/L 03/09/19 17:12 1Naphthalene

ND 0.500 ug/L 03/09/19 17:12 1n-Butylbenzene

ND 0.500 ug/L 03/09/19 17:12 1N-Propylbenzene

ND 0.500 ug/L 03/09/19 17:12 1p-Isopropyltoluene

ND 0.500 ug/L 03/09/19 17:12 1sec-Butylbenzene

ND 0.500 ug/L 03/09/19 17:12 1Styrene

ND 0.500 ug/L 03/09/19 17:12 1Tert-amyl methyl ether

ND 10.0 ug/L 03/09/19 17:12 1tert-Butyl alcohol

ND 0.500 ug/L 03/09/19 17:12 1tert-Butylbenzene

ND 0.500 ug/L 03/09/19 17:12 11,1,1,2-Tetrachloroethane


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Method: 524.2 - Volatile Organic Compounds (GC/MS) (Continued)


RL MDL

1,1,2,2-Tetrachloroethane ND 0.500 ug/L 03/09/19 17:12 1

MB MB


ND 0.500 ug/L 03/09/19 17:12 1Tetrachloroethene

ND 0.500 ug/L 03/09/19 17:12 1Toluene

ND 0.500 ug/L 03/09/19 17:12 1trans-1,2-Dichloroethene

ND 0.500 ug/L 03/09/19 17:12 1trans-1,3-Dichloropropene

ND 0.500 ug/L 03/09/19 17:12 11,2,3-Trichlorobenzene


ND 0.500 ug/L 03/09/19 17:12 11,1,1-Trichloroethane


ND 0.500 ug/L 03/09/19 17:12 1Trichloroethene

ND 0.500 ug/L 03/09/19 17:12 1Trichlorofluoromethane

ND 0.500 ug/L 03/09/19 17:12 11,2,3-Trichloropropane

ND 0.500 ug/L 03/09/19 17:12 11,2,4-Trimethylbenzene


ND 0.500 ug/L 03/09/19 17:12 1Vinyl chloride

ND 1.00 ug/L 03/09/19 17:12 1Xylenes, Total


MB MB

Surrogate Dil FacPrepared AnalyzedQualifier Limits%Recovery

101 03/09/19 17:12 1Dibromofluoromethane (Surr) 70 - 130

100 03/09/19 17:12 11,2-Dichloroethane-d4 (Surr) 70 - 130

101 03/09/19 17:12 1Toluene-d8 (Surr) 70 - 130

Client Sample ID: Lab Control SampleLab Sample ID: LCS 490-579919/3Matrix: Water Prep Type: Total/NAAnalysis Batch: 579919

Benzene 5.00 4.683 ug/L 94 70 - 130

Analyte

LCS LCS

DUnitResult Qualifier %Rec

Spike

Added

%Rec.

Limits

Bromobenzene 5.00 5.350 ug/L 107 70 - 130

Bromochloromethane 5.00 4.999 ug/L 100 70 - 130

Bromodichloromethane 5.00 5.091 ug/L 102 70 - 130

Bromoform 5.00 4.615 ug/L 92 70 - 130

Bromomethane 5.00 5.320 ug/L 106 70 - 130

Carbon disulfide 5.00 5.012 ug/L 100 70 - 130

Carbon tetrachloride 5.00 4.890 ug/L 98 70 - 130

Chlorobenzene 5.00 5.115 ug/L 102 70 - 130

Chlorodibromomethane 5.00 4.794 ug/L 96 70 - 130

Chloroethane 5.00 5.758 ug/L 115 70 - 130

Chloroform 5.00 4.997 ug/L 100 70 - 130

Chloromethane 5.00 6.108 ug/L 122 70 - 130

2-Chlorotoluene 5.00 5.074 ug/L 101 70 - 130


cis-1,2-Dichloroethene 5.00 4.940 ug/L 99 70 - 130

cis-1,3-Dichloropropene 5.00 4.933 ug/L 99 70 - 130

1,2-Dibromo-3-Chloropropane 5.00 4.985 ug/L 100 70 - 130

1,2-Dibromoethane (EDB) 5.00 5.147 ug/L 103 70 - 130

Dibromomethane 5.00 5.078 ug/L 102 70 - 130


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1,2-Dichlorobenzene 5.00 5.202 ug/L 104 70 - 130

Analyte

LCS LCS


Spike

Added

%Rec.

Limits



Dichlorodifluoromethane 5.00 7.887 * ug/L 158 70 - 130

1,1-Dichloroethane 5.00 5.020 ug/L 100 70 - 130


1,1-Dichloroethene 5.00 5.166 ug/L 103 70 - 130

1,2-Dichloropropane 5.00 4.906 ug/L 98 70 - 130



1,1-Dichloropropene 5.00 4.892 ug/L 98 70 - 130

Diisopropyl ether 5.00 5.024 ug/L 100 70 - 130

Ethylbenzene 5.00 5.067 ug/L 101 70 - 130

Ethyl tert-butyl ether 5.00 5.265 ug/L 105 70 - 130

Hexachlorobutadiene 5.00 5.271 ug/L 105 70 - 130

Isopropylbenzene 5.00 5.120 ug/L 102 70 - 130

Methylene Chloride 5.00 5.608 ug/L 112 70 - 130

Methyl tert-butyl ether 5.00 5.294 ug/L 106 70 - 130

Naphthalene 5.00 5.305 ug/L 106 70 - 130

n-Butylbenzene 5.00 4.904 ug/L 98 70 - 130

N-Propylbenzene 5.00 5.331 ug/L 107 70 - 130

p-Isopropyltoluene 5.00 4.883 ug/L 98 70 - 130

sec-Butylbenzene 5.00 5.368 ug/L 107 70 - 130

Styrene 5.00 5.264 ug/L 105 70 - 130

Tert-amyl methyl ether 5.00 5.198 ug/L 104 70 - 130

tert-Butyl alcohol 50.0 51.00 ug/L 102 70 - 130

tert-Butylbenzene 5.00 5.171 ug/L 103 70 - 130

1,1,1,2-Tetrachloroethane 5.00 4.955 ug/L 99 70 - 130


Tetrachloroethene 5.00 5.003 ug/L 100 70 - 130

Toluene 5.00 5.111 ug/L 102 70 - 130

trans-1,2-Dichloroethene 5.00 5.008 ug/L 100 70 - 130

trans-1,3-Dichloropropene 5.00 4.881 ug/L 98 70 - 130

1,2,3-Trichlorobenzene 5.00 5.471 ug/L 109 70 - 130


1,1,1-Trichloroethane 5.00 4.862 ug/L 97 70 - 130


Trichloroethene 5.00 5.060 ug/L 101 70 - 130

Trichlorofluoromethane 5.00 5.824 ug/L 116 70 - 130

1,2,3-Trichloropropane 5.00 5.167 ug/L 103 70 - 130

1,2,4-Trimethylbenzene 5.00 5.464 ug/L 109 70 - 130


Vinyl chloride 5.00 6.039 ug/L 121 70 - 130

Xylenes, Total 10.0 10.25 ug/L 103 70 - 130

4-Bromofluorobenzene (Surr) 70 - 130

Surrogate

103

LCS LCS

Qualifier Limits%Recovery

102Dibromofluoromethane (Surr) 70 - 130


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1,2-Dichloroethane-d4 (Surr) 70 - 130

Surrogate

105

LCS LCS


104Toluene-d8 (Surr) 70 - 130

Client Sample ID: Lab Control Sample DupLab Sample ID: LCSD 490-579919/4Matrix: Water Prep Type: Total/NAAnalysis Batch: 579919

Benzene 5.00 4.651 ug/L 93 70 - 130 1 20

Analyte

LCSD LCSD


Spike

Added

%Rec.

Limits LimitRPD

RPD

Bromobenzene 5.00 4.986 ug/L 100 70 - 130 7 20

Bromochloromethane 5.00 4.628 ug/L 93 70 - 130 8 20

Bromodichloromethane 5.00 4.767 ug/L 95 70 - 130 7 20

Bromoform 5.00 4.786 ug/L 96 70 - 130 4 20

Bromomethane 5.00 5.113 ug/L 102 70 - 130 4 20

Carbon disulfide 5.00 4.827 ug/L 97 70 - 130 4 20

Carbon tetrachloride 5.00 4.747 ug/L 95 70 - 130 3 20

Chlorobenzene 5.00 5.118 ug/L 102 70 - 130 0 20

Chlorodibromomethane 5.00 4.502 ug/L 90 70 - 130 6 20

Chloroethane 5.00 5.373 ug/L 107 70 - 130 7 20

Chloroform 5.00 4.749 ug/L 95 70 - 130 5 20

Chloromethane 5.00 5.847 ug/L 117 70 - 130 4 20

2-Chlorotoluene 5.00 4.890 ug/L 98 70 - 130 4 20


cis-1,2-Dichloroethene 5.00 4.693 ug/L 94 70 - 130 5 20

cis-1,3-Dichloropropene 5.00 4.525 ug/L 90 70 - 130 9 20

1,2-Dibromo-3-Chloropropane 5.00 5.021 ug/L 100 70 - 130 1 20

1,2-Dibromoethane (EDB) 5.00 4.948 ug/L 99 70 - 130 4 20

Dibromomethane 5.00 4.883 ug/L 98 70 - 130 4 20

1,2-Dichlorobenzene 5.00 5.088 ug/L 102 70 - 130 2 20



Dichlorodifluoromethane 5.00 7.614 * ug/L 152 70 - 130 4 20

1,1-Dichloroethane 5.00 4.921 ug/L 98 70 - 130 2 20


1,1-Dichloroethene 5.00 5.011 ug/L 100 70 - 130 3 20

1,2-Dichloropropane 5.00 4.708 ug/L 94 70 - 130 4 20



1,1-Dichloropropene 5.00 4.899 ug/L 98 70 - 130 0 20

Diisopropyl ether 5.00 4.676 ug/L 94 70 - 130 7 20

Ethylbenzene 5.00 5.058 ug/L 101 70 - 130 0 20

Ethyl tert-butyl ether 5.00 4.847 ug/L 97 70 - 130 8 20

Hexachlorobutadiene 5.00 4.816 ug/L 96 70 - 130 9 20

Isopropylbenzene 5.00 5.171 ug/L 103 70 - 130 1 20

Methylene Chloride 5.00 5.239 ug/L 105 70 - 130 7 20

Methyl tert-butyl ether 5.00 4.769 ug/L 95 70 - 130 10 20

Naphthalene 5.00 4.937 J ug/L 99 70 - 130 7 20

n-Butylbenzene 5.00 4.921 ug/L 98 70 - 130 0 20


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N-Propylbenzene 5.00 5.092 ug/L 102 70 - 130 5 20

Analyte

LCSD LCSD


Spike

Added

%Rec.

Limits LimitRPD

RPD

p-Isopropyltoluene 5.00 4.970 ug/L 99 70 - 130 2 20

sec-Butylbenzene 5.00 5.072 ug/L 101 70 - 130 6 20

Styrene 5.00 5.157 ug/L 103 70 - 130 2 20

Tert-amyl methyl ether 5.00 4.908 ug/L 98 70 - 130 6 20

tert-Butyl alcohol 50.0 45.62 ug/L 91 70 - 130 11 20

tert-Butylbenzene 5.00 5.171 ug/L 103 70 - 130 0 20

1,1,1,2-Tetrachloroethane 5.00 4.978 ug/L 100 70 - 130 0 20


Tetrachloroethene 5.00 4.853 ug/L 97 70 - 130 3 20

Toluene 5.00 5.100 ug/L 102 70 - 130 0 20

trans-1,2-Dichloroethene 5.00 4.568 ug/L 91 70 - 130 9 20

trans-1,3-Dichloropropene 5.00 4.513 ug/L 90 70 - 130 8 20

1,2,3-Trichlorobenzene 5.00 4.927 ug/L 99 70 - 130 10 20


1,1,1-Trichloroethane 5.00 4.707 ug/L 94 70 - 130 3 20


Trichloroethene 5.00 4.928 ug/L 99 70 - 130 3 20

Trichlorofluoromethane 5.00 5.740 ug/L 115 70 - 130 1 20

1,2,3-Trichloropropane 5.00 5.697 ug/L 114 70 - 130 10 20

1,2,4-Trimethylbenzene 5.00 5.156 ug/L 103 70 - 130 6 20


Vinyl chloride 5.00 5.556 ug/L 111 70 - 130 8 20

Xylenes, Total 10.0 9.961 ug/L 100 70 - 130 3 20


Surrogate

103

LCSD LCSD





Method: 8260B - Volatile Organic Compounds (GC/MS)


RL MDL

Acetone ND 25.0 ug/L 03/09/19 17:00 1

MB MB


ND 1.00 ug/L 03/09/19 17:00 1Benzene



ND 1.00 ug/L 03/09/19 17:00 1Bromoform


ND 50.0 ug/L 03/09/19 17:00 12-Butanone (MEK)





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Method: 8260B - Volatile Organic Compounds (GC/MS) (Continued)


RL MDL

Chlorodibromomethane ND 1.00 ug/L 03/09/19 17:00 1

MB MB







ND 5.00 ug/L 03/09/19 17:00 1Cyclohexane














ND 1.00 ug/L 03/09/19 17:00 1Freon 113

ND 10.0 ug/L 03/09/19 17:00 12-Hexanone


ND 10.0 ug/L 03/09/19 17:00 1Methyl acetate

ND 5.00 ug/L 03/09/19 17:00 1Methylcyclohexane


ND 10.0 ug/L 03/09/19 17:00 14-Methyl-2-pentanone (MIBK)



ND 1.00 ug/L 03/09/19 17:00 1Styrene


ND 10.0 ug/L 03/09/19 17:00 1tert-Butyl alcohol (TBA)



ND 1.00 ug/L 03/09/19 17:00 1Toluene










ND 2.00 ug/L 03/09/19 17:00 1m,p-Xylene

ND 1.00 ug/L 03/09/19 17:00 1o-Xylene



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MB MB




106 03/09/19 17:00 1Toluene-d8 (Surr) 70 - 130


Acetone 100 93.54 ug/L 94 39 - 150

Analyte

LCS LCS


Spike

Added

%Rec.

Limits

Benzene 20.0 18.05 ug/L 90 70 - 130



Bromoform 20.0 16.88 ug/L 84 70 - 137

Bromomethane 20.0 34.61 * ug/L 173 53 - 150

2-Butanone (MEK) 100 87.42 ug/L 87 55 - 143






Chloroform 20.0 19.34 ug/L 97 70 - 130




Cyclohexane 20.0 17.21 ug/L 86 70 - 134






Dichlorodifluoromethane 20.0 21.43 ug/L 107 48 - 150








Freon 113 20.0 19.76 ug/L 99 69 - 145

2-Hexanone 100 88.78 ug/L 89 54 - 142


Methyl acetate 40.0 32.26 ug/L 81 56 - 136

Methylcyclohexane 20.0 15.52 ug/L 78 70 - 132


4-Methyl-2-pentanone (MIBK) 100 92.13 ug/L 92 60 - 137



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Naphthalene 20.0 18.04 ug/L 90 54 - 150

Analyte

LCS LCS


Spike

Added

%Rec.

Limits

Styrene 20.0 17.22 ug/L 86 70 - 130


tert-Butyl alcohol (TBA) 200 209.9 ug/L 105 12 - 150



Toluene 20.0 20.40 ug/L 102 70 - 130










m,p-Xylene 20.0 18.06 ug/L 90 70 - 130

o-Xylene 20.0 17.58 ug/L 88 70 - 130



Surrogate

101

LCS LCS





Client Sample ID: Matrix SpikeLab Sample ID: 490-169835-B-7 MSMatrix: Water Prep Type: Total/NAAnalysis Batch: 579888

Acetone ND 500 420.8 ug/L 84 39 - 150

Analyte

MS MS


Spike

Added

Sample

Result

Sample

Qualifier

%Rec.

Limits

Benzene ND 100 79.63 ug/L 80 55 - 147

Bromochloromethane ND 100 89.27 ug/L 89 59 - 132

Bromodichloromethane ND 100 73.17 ug/L 73 70 - 140

Bromoform ND 100 74.54 ug/L 75 53 - 150

Bromomethane ND F1 * 100 136.4 ug/L 136 30 - 150

2-Butanone (MEK) ND 500 409.7 ug/L 82 50 - 143

Carbon disulfide ND 100 70.72 ug/L 71 35 - 150

Carbon tetrachloride ND 100 94.50 ug/L 95 56 - 150

Chlorobenzene ND 100 80.15 ug/L 80 70 - 130

Chlorodibromomethane ND 100 77.07 ug/L 77 66 - 140

Chloroethane 6.48 100 97.00 ug/L 91 58 - 141

Chloroform ND 100 86.99 ug/L 87 66 - 138

Chloromethane ND 100 91.20 ug/L 91 10 - 150

cis-1,2-Dichloroethene 290 100 378.2 ug/L 88 68 - 131

cis-1,3-Dichloropropene ND 100 79.56 ug/L 80 70 - 133

Cyclohexane ND 100 78.05 ug/L 78 48 - 150


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1,2-Dibromo-3-Chloropropane ND 100 64.08 ug/L 64 38 - 138

Analyte

MS MS


Spike

Added

Sample

Result

Sample

Qualifier

%Rec.

Limits

1,2-Dibromoethane (EDB) ND 100 84.06 ug/L 84 65 - 137

1,2-Dichlorobenzene ND 100 86.41 ug/L 86 70 - 130



Dichlorodifluoromethane ND 100 96.32 ug/L 96 10 - 150

1,1-Dichloroethane ND 100 91.98 ug/L 89 61 - 139


1,1-Dichloroethene ND 100 98.04 ug/L 96 54 - 150

1,2-Dichloropropane ND 100 71.71 ug/L 72 67 - 130

Diisopropyl ether ND 100 77.68 ug/L 78 56 - 142

Ethylbenzene ND 100 79.28 ug/L 79 65 - 139

Ethyl tert-butyl ether ND 100 74.77 ug/L 75 53 - 138

Freon 113 ND 100 93.90 ug/L 94 63 - 150

2-Hexanone ND 500 350.5 ug/L 70 44 - 150

Isopropylbenzene ND 100 77.33 ug/L 77 70 - 137

Methyl acetate ND 200 140.8 ug/L 70 42 - 136

Methylcyclohexane ND 100 67.33 ug/L 67 59 - 150

Methylene Chloride ND 100 78.64 ug/L 79 64 - 130

4-Methyl-2-pentanone (MIBK) ND 500 379.1 ug/L 76 50 - 140

Methyl tert-butyl ether ND 100 75.67 ug/L 76 55 - 141

Naphthalene ND F2 100 48.63 ug/L 49 32 - 150

Styrene ND 100 75.04 ug/L 75 70 - 130

Tert-amyl methyl ether ND 100 68.73 ug/L 69 47 - 148

tert-Butyl alcohol (TBA) ND 1000 1002 ug/L 100 10 - 150

1,1,2,2-Tetrachloroethane ND 100 76.26 ug/L 76 56 - 145

Tetrachloroethene 587 100 646.6 4 ug/L 60 57 - 138

Toluene ND 100 88.51 ug/L 89 64 - 136

trans-1,2-Dichloroethene ND 100 89.43 ug/L 88 59 - 143

trans-1,3-Dichloropropene ND 100 75.25 ug/L 75 63 - 142

1,2,3-Trichlorobenzene ND 100 53.27 ug/L 53 36 - 150

1,2,4-Trichlorobenzene ND F2 100 64.43 ug/L 64 47 - 147

1,1,1-Trichloroethane ND 100 90.31 ug/L 90 68 - 144


Trichloroethene 74.8 100 162.4 ug/L 88 63 - 135

Trichlorofluoromethane ND 100 115.1 ug/L 115 44 - 150

Vinyl chloride 13.6 100 104.5 ug/L 91 57 - 150

m,p-Xylene ND 100 79.08 ug/L 79 70 - 130

o-Xylene ND 100 77.95 ug/L 78 70 - 131

Xylenes, Total ND 200 157.0 ug/L 79 69 - 132


Surrogate

92

MS MS






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Client Sample ID: Matrix Spike DuplicateLab Sample ID: 490-169835-B-7 MSDMatrix: Water Prep Type: Total/NAAnalysis Batch: 579888

Acetone ND 500 436.4 ug/L 87 39 - 150 4 28

Analyte

MSD MSD


Spike

Added

Sample

Result

Sample

Qualifier

%Rec.

Limits LimitRPD

RPD

Benzene ND 100 82.62 ug/L 83 55 - 147 4 22

Bromochloromethane ND 100 90.27 ug/L 90 59 - 132 1 21

Bromodichloromethane ND 100 79.84 ug/L 80 70 - 140 9 196

Bromoform ND 100 77.34 ug/L 77 53 - 150 4 20

Bromomethane ND F1 * 100 154.8 F1 ug/L 155 30 - 150 13 44

2-Butanone (MEK) ND 500 457.3 ug/L 91 50 - 143 11 28

Carbon disulfide ND 100 73.64 ug/L 74 35 - 150 4 34

Carbon tetrachloride ND 100 100.1 ug/L 100 56 - 150 6 18

Chlorobenzene ND 100 85.43 ug/L 85 70 - 130 6 15

Chlorodibromomethane ND 100 87.75 ug/L 88 66 - 140 13 19

Chloroethane 6.48 100 104.7 ug/L 98 58 - 141 8 31

Chloroform ND 100 90.85 ug/L 91 66 - 138 4 21

Chloromethane ND 100 98.51 ug/L 99 10 - 150 8 43

cis-1,2-Dichloroethene 290 100 383.5 ug/L 93 68 - 131 1 21

cis-1,3-Dichloropropene ND 100 86.71 ug/L 87 70 - 133 9 19

Cyclohexane ND 100 78.87 ug/L 79 48 - 150 1 22

1,2-Dibromo-3-Chloropropane ND 100 72.45 ug/L 72 38 - 138 12 26

1,2-Dibromoethane (EDB) ND 100 90.99 ug/L 91 65 - 137 8 21

1,2-Dichlorobenzene ND 100 93.06 ug/L 93 70 - 130 7 15



Dichlorodifluoromethane ND 100 102.5 ug/L 103 10 - 150 6 50

1,1-Dichloroethane ND 100 103.8 ug/L 101 61 - 139 12 23


1,1-Dichloroethene ND 100 106.4 ug/L 104 54 - 150 8 24

1,2-Dichloropropane ND 100 80.59 ug/L 81 67 - 130 12 19

Diisopropyl ether ND 100 80.07 ug/L 80 56 - 142 3 22

Ethylbenzene ND 100 83.45 ug/L 83 65 - 139 5 18

Ethyl tert-butyl ether ND 100 82.14 ug/L 82 53 - 138 9 22

Freon 113 ND 100 99.25 ug/L 99 63 - 150 6 22

2-Hexanone ND 500 394.1 ug/L 79 44 - 150 12 21

Isopropylbenzene ND 100 80.99 ug/L 81 70 - 137 5 17

Methyl acetate ND 200 142.4 ug/L 71 42 - 136 1 26

Methylcyclohexane ND 100 70.14 ug/L 70 59 - 150 4 20

Methylene Chloride ND 100 81.59 ug/L 82 64 - 130 4 22

4-Methyl-2-pentanone (MIBK) ND 500 415.8 ug/L 83 50 - 140 9 24

Methyl tert-butyl ether ND 100 82.87 ug/L 83 55 - 141 9 24

Naphthalene ND F2 100 75.23 F2 ug/L 75 32 - 150 43 40

Styrene ND 100 79.17 ug/L 79 70 - 130 5 16

Tert-amyl methyl ether ND 100 73.34 ug/L 73 47 - 148 6 23

tert-Butyl alcohol (TBA) ND 1000 989.1 ug/L 99 10 - 150 1 47

1,1,2,2-Tetrachloroethane ND 100 80.14 ug/L 80 56 - 145 5 19

Tetrachloroethene 587 100 655.6 4 ug/L 69 57 - 138 1 17

Toluene ND 100 95.26 ug/L 95 64 - 136 7 18

trans-1,2-Dichloroethene ND 100 95.02 ug/L 93 59 - 143 6 25

trans-1,3-Dichloropropene ND 100 82.80 ug/L 83 63 - 142 10 18

1,2,3-Trichlorobenzene ND 100 82.45 ug/L 82 36 - 150 43 43


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1,2,4-Trichlorobenzene ND F2 100 83.64 F2 ug/L 84 47 - 147 26 24

Analyte

MSD MSD


Spike

Added

Sample

Result

Sample

Qualifier

%Rec.

Limits LimitRPD

RPD

1,1,1-Trichloroethane ND 100 95.75 ug/L 96 68 - 144 6 17


Trichloroethene 74.8 100 169.1 ug/L 94 63 - 135 4 17

Trichlorofluoromethane ND 100 119.5 ug/L 120 44 - 150 4 32

Vinyl chloride 13.6 100 112.9 ug/L 99 57 - 150 8 37

m,p-Xylene ND 100 82.84 ug/L 83 70 - 130 5 17

o-Xylene ND 100 81.71 ug/L 82 70 - 131 5 17

Xylenes, Total ND 200 164.6 ug/L 82 69 - 132 5 17


Surrogate

90

MSD MSD






RL MDL

Acetone ND 25.0 ug/L 03/12/19 13:49 1

MB MB


ND 1.00 ug/L 03/12/19 13:49 1Benzene



ND 1.00 ug/L 03/12/19 13:49 1Bromoform


ND 50.0 ug/L 03/12/19 13:49 12-Butanone (MEK)










ND 5.00 ug/L 03/12/19 13:49 1Cyclohexane












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RL MDL

Diisopropyl ether ND 2.00 ug/L 03/12/19 13:49 1

MB MB




ND 1.00 ug/L 03/12/19 13:49 1Freon 113

ND 10.0 ug/L 03/12/19 13:49 12-Hexanone


ND 10.0 ug/L 03/12/19 13:49 1Methyl acetate

ND 5.00 ug/L 03/12/19 13:49 1Methylcyclohexane


ND 10.0 ug/L 03/12/19 13:49 14-Methyl-2-pentanone (MIBK)



ND 1.00 ug/L 03/12/19 13:49 1Styrene


ND 10.0 ug/L 03/12/19 13:49 1tert-Butyl alcohol (TBA)



ND 1.00 ug/L 03/12/19 13:49 1Toluene










ND 2.00 ug/L 03/12/19 13:49 1m,p-Xylene

ND 1.00 ug/L 03/12/19 13:49 1o-Xylene



MB MB




100 03/12/19 13:49 1Toluene-d8 (Surr) 70 - 130


Acetone 100 141.4 ug/L 141 39 - 150

Analyte

LCS LCS


Spike

Added

%Rec.

Limits

Benzene 20.0 19.25 ug/L 96 70 - 130



Bromoform 20.0 30.54 * ug/L 153 70 - 137



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2-Butanone (MEK) 100 130.2 ug/L 130 55 - 143

Analyte

LCS LCS


Spike

Added

%Rec.

Limits






Chloroform 20.0 17.71 ug/L 89 70 - 130




Cyclohexane 20.0 19.86 ug/L 99 70 - 134














Freon 113 20.0 18.14 ug/L 91 69 - 145

2-Hexanone 100 150.2 * ug/L 150 54 - 142


Methyl acetate 40.0 57.31 * ug/L 143 56 - 136

Methylcyclohexane 20.0 19.74 ug/L 99 70 - 132


4-Methyl-2-pentanone (MIBK) 100 148.2 * ug/L 148 60 - 137


Naphthalene 20.0 27.00 ug/L 135 54 - 150

Styrene 20.0 21.50 ug/L 107 70 - 130


tert-Butyl alcohol (TBA) 200 212.2 ug/L 106 12 - 150

1,1,2,2-Tetrachloroethane 20.0 30.67 * ug/L 153 69 - 131


Toluene 20.0 18.86 ug/L 94 70 - 130











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m,p-Xylene 20.0 21.58 ug/L 108 70 - 130

Analyte

LCS LCS


Spike

Added

%Rec.

Limits

o-Xylene 20.0 21.82 ug/L 109 70 - 130



Surrogate

106

LCS LCS






Acetone ND 500 445.3 ug/L 89 39 - 150

Analyte

MS MS


Spike

Added

Sample

Result

Sample

Qualifier

%Rec.

Limits

Benzene 101 100 188.5 ug/L 87 55 - 147

Bromochloromethane ND 100 86.16 ug/L 86 59 - 132

Bromodichloromethane ND 100 92.54 ug/L 93 70 - 140

Bromoform ND * 100 118.3 ug/L 118 53 - 150

Bromomethane ND 100 99.97 ug/L 100 30 - 150

2-Butanone (MEK) ND 500 440.9 ug/L 88 50 - 143

Carbon disulfide ND 100 95.51 ug/L 96 35 - 150

Carbon tetrachloride ND 100 91.68 ug/L 92 56 - 150

Chlorobenzene ND 100 105.4 ug/L 105 70 - 130

Chlorodibromomethane ND 100 95.96 ug/L 96 66 - 140

Chloroethane ND 100 98.34 ug/L 98 58 - 141

Chloroform ND 100 85.63 ug/L 86 66 - 138

Chloromethane ND 100 112.2 ug/L 112 10 - 150

cis-1,2-Dichloroethene ND 100 81.69 ug/L 82 68 - 131

cis-1,3-Dichloropropene ND 100 101.4 ug/L 101 70 - 133

Cyclohexane 38.3 100 130.9 ug/L 93 48 - 150

1,2-Dibromo-3-Chloropropane ND 100 107.8 ug/L 108 38 - 138

1,2-Dibromoethane (EDB) ND 100 107.0 ug/L 107 65 - 137




Dichlorodifluoromethane ND 100 107.4 ug/L 107 10 - 150



1,1-Dichloroethene ND 100 89.74 ug/L 90 54 - 150

1,2-Dichloropropane ND 100 97.48 ug/L 97 67 - 130

Diisopropyl ether 23.1 100 126.8 ug/L 104 56 - 142

Ethylbenzene 13.1 100 126.8 ug/L 114 65 - 139

Ethyl tert-butyl ether ND 100 85.54 ug/L 86 53 - 138

Freon 113 ND 100 93.76 ug/L 94 63 - 150

2-Hexanone ND * 500 608.1 ug/L 122 44 - 150

Isopropylbenzene ND 100 119.6 ug/L 117 70 - 137


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Methyl acetate ND * 200 220.1 ug/L 110 42 - 136

Analyte

MS MS


Spike

Added

Sample

Result

Sample

Qualifier

%Rec.

Limits

Methylcyclohexane ND 100 124.8 ug/L 105 59 - 150

Methylene Chloride ND 100 93.52 ug/L 94 64 - 130

4-Methyl-2-pentanone (MIBK) ND * 500 554.7 ug/L 111 50 - 140

Methyl tert-butyl ether 227 100 307.3 ug/L 80 55 - 141

Naphthalene ND 100 130.1 ug/L 120 32 - 150

Styrene ND 100 108.9 ug/L 109 70 - 130

Tert-amyl methyl ether ND 100 85.56 ug/L 86 47 - 148

tert-Butyl alcohol (TBA) 544 1000 1592 ug/L 105 10 - 150

1,1,2,2-Tetrachloroethane ND * 100 126.0 ug/L 126 56 - 145

Tetrachloroethene ND 100 94.72 ug/L 95 57 - 138

Toluene ND 100 107.3 ug/L 103 64 - 136

trans-1,2-Dichloroethene ND 100 94.05 ug/L 94 59 - 143

trans-1,3-Dichloropropene ND 100 131.9 ug/L 132 63 - 142





Trichloroethene ND 100 90.81 ug/L 91 63 - 135

Trichlorofluoromethane ND 100 96.38 ug/L 96 44 - 150

Vinyl chloride ND 100 117.2 ug/L 117 57 - 150

m,p-Xylene ND 100 116.7 ug/L 117 70 - 130

o-Xylene ND 100 115.5 ug/L 113 70 - 131

Xylenes, Total ND 200 232.2 ug/L 116 69 - 132


Surrogate

109

MS MS






Acetone ND 500 378.5 ug/L 76 39 - 150 16 28

Analyte

MSD MSD


Spike

Added

Sample

Result

Sample

Qualifier

%Rec.

Limits LimitRPD

RPD

Benzene 101 100 174.0 ug/L 73 55 - 147 8 22

Bromochloromethane ND 100 90.42 ug/L 90 59 - 132 5 21

Bromodichloromethane ND 100 84.16 ug/L 84 70 - 140 9 196

Bromoform ND * 100 120.6 ug/L 121 53 - 150 2 20

Bromomethane ND 100 104.7 ug/L 105 30 - 150 5 44

2-Butanone (MEK) ND 500 410.5 ug/L 82 50 - 143 7 28

Carbon disulfide ND 100 96.43 ug/L 96 35 - 150 1 34

Carbon tetrachloride ND 100 95.77 ug/L 96 56 - 150 4 18

Chlorobenzene ND 100 105.5 ug/L 106 70 - 130 0 15

Chlorodibromomethane ND 100 96.31 ug/L 96 66 - 140 0 19

Chloroethane ND 100 96.52 ug/L 97 58 - 141 2 31


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Chloroform ND 100 85.90 ug/L 86 66 - 138 0 21

Analyte

MSD MSD


Spike

Added

Sample

Result

Sample

Qualifier

%Rec.

Limits LimitRPD

RPD

Chloromethane ND 100 108.6 ug/L 109 10 - 150 3 43

cis-1,2-Dichloroethene ND 100 85.22 ug/L 85 68 - 131 4 21

cis-1,3-Dichloropropene ND 100 101.3 ug/L 101 70 - 133 0 19

Cyclohexane 38.3 100 123.1 ug/L 85 48 - 150 6 22

1,2-Dibromo-3-Chloropropane ND 100 104.0 ug/L 104 38 - 138 4 26

1,2-Dibromoethane (EDB) ND 100 104.6 ug/L 105 65 - 137 2 21




Dichlorodifluoromethane ND 100 111.8 ug/L 112 10 - 150 4 50



1,1-Dichloroethene ND 100 87.80 ug/L 88 54 - 150 2 24

1,2-Dichloropropane ND 100 93.99 ug/L 94 67 - 130 4 19

Diisopropyl ether 23.1 100 124.7 ug/L 102 56 - 142 2 22

Ethylbenzene 13.1 100 124.4 ug/L 111 65 - 139 2 18

Ethyl tert-butyl ether ND 100 89.49 ug/L 89 53 - 138 5 22

Freon 113 ND 100 90.64 ug/L 91 63 - 150 3 22

2-Hexanone ND * 500 543.5 ug/L 109 44 - 150 11 21

Isopropylbenzene ND 100 114.8 ug/L 112 70 - 137 4 17

Methyl acetate ND * 200 204.5 ug/L 102 42 - 136 7 26

Methylcyclohexane ND 100 119.2 ug/L 99 59 - 150 5 20

Methylene Chloride ND 100 93.85 ug/L 94 64 - 130 0 22

4-Methyl-2-pentanone (MIBK) ND * 500 461.6 ug/L 92 50 - 140 18 24

Methyl tert-butyl ether 227 100 282.9 ug/L 56 55 - 141 8 24

Naphthalene ND 100 114.7 ug/L 104 32 - 150 13 40

Styrene ND 100 104.4 ug/L 104 70 - 130 4 16

Tert-amyl methyl ether ND 100 80.85 ug/L 81 47 - 148 6 23

tert-Butyl alcohol (TBA) 544 1000 1509 ug/L 97 10 - 150 5 47

1,1,2,2-Tetrachloroethane ND * 100 119.9 ug/L 120 56 - 145 5 19

Tetrachloroethene ND 100 92.11 ug/L 92 57 - 138 3 17

Toluene ND 100 96.20 ug/L 92 64 - 136 11 18

trans-1,2-Dichloroethene ND 100 90.52 ug/L 91 59 - 143 4 25

trans-1,3-Dichloropropene ND 100 119.3 ug/L 119 63 - 142 10 18





Trichloroethene ND 100 90.89 ug/L 91 63 - 135 0 17

Trichlorofluoromethane ND 100 97.81 ug/L 98 44 - 150 1 32

Vinyl chloride ND 100 112.7 ug/L 113 57 - 150 4 37

m,p-Xylene ND 100 110.3 ug/L 110 70 - 130 6 17

o-Xylene ND 100 112.6 ug/L 110 70 - 131 3 17

Xylenes, Total ND 200 222.9 ug/L 111 69 - 132 4 17


Surrogate

110

MSD MSD



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Dibromofluoromethane (Surr) 70 - 130

Surrogate

93

MSD MSD




Method: 8015B GRO LL - Gasoline Range Organics - (GC)


RL MDL


MB MB



MB MB



Gasoline Range Organics [C6 -

C10]

1000 1063 ug/L 106 66 - 140

Analyte

LCS LCS


Spike

Added

%Rec.

Limits

a,a,a-Trifluorotoluene 50 - 150

Surrogate

117

LCS LCS



Gasoline Range Organics [C6 -

C10]

1000 1097 ug/L 110 66 - 140 3 42

Analyte

LCSD LCSD


Spike

Added

%Rec.

Limits LimitRPD

RPD

a,a,a-Trifluorotoluene 50 - 150

Surrogate

91

LCSD LCSD



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QC Association SummaryTestAmerica Job ID: 490-169885-1Client: AECOM


GC/MS VOA

Analysis Batch: 579888

Lab Sample ID Client Sample ID Prep Type Matrix Method Prep Batch

Water 8260B490-169885-9 MW-9 Total/NA


Water 8260BMB 490-579888/6 Method Blank Total/NA

Water 8260BLCS 490-579888/4 Lab Control Sample Total/NA

Water 8260B490-169835-B-7 MS Matrix Spike Total/NA

Water 8260B490-169835-B-7 MSD Matrix Spike Duplicate Total/NA



Water 524.2490-169885-11 7-11 Potable (P.O.U) Total/NA

Water 524.2490-169885-12 124 Hanover INF Total/NA

Water 524.2490-169885-13 124 Hanover GAC-1 EFF Total/NA


Water 524.2490-169885-15 124 Hanover FINAL EFF Total/NA

Water 524.2MB 490-579919/7 Method Blank Total/NA

Water 524.2LCS 490-579919/3 Lab Control Sample Total/NA

Water 524.2LCSD 490-579919/4 Lab Control Sample Dup Total/NA













Water 8260BMB 490-580333/5 Method Blank Total/NA

Water 8260BLCS 490-580333/3 Lab Control Sample Total/NA

Water 8260B490-169648-B-1 MS Matrix Spike Total/NA

Water 8260B490-169648-B-1 MSD Matrix Spike Duplicate Total/NA

GC VOA



Water 8015B GRO LL490-169885-1 MW-1 Total/NA










Water 8015B GRO LLMB 490-579978/8 Method Blank Total/NA


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GC VOA (Continued)

Analysis Batch: 579978 (Continued)


Water 8015B GRO LLLCS 490-579978/5 Lab Control Sample Total/NA

Water 8015B GRO LLLCSD 490-579978/6 Lab Control Sample Dup Total/NA


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Lab ChronicleClient: AECOM TestAmerica Job ID: 490-169885-1Project/Site: 32785.Hampstead.EL (MD) SDG: 125 Hanover Pike, Hampstead, MD

Client Sample ID: MW-1 Lab Sample ID: 490-169885-1Matrix: WaterDate Collected: 03/07/19 14:25


Analysis 8260B RP03/12/19 15:101 TAL NSH580333

Type

Batch

Method

Batch

Prep Type LabAnalystRun

Prepared

or Analyzed

Initial

Amount Amount

Final Batch

NumberFactor

Dil

Total/NA 10 mL 10 mL

Analysis 8015B GRO LL 1 579978 03/11/19 18:50 AK1 TAL NSHTotal/NA 5 mL 5 mL




Type

Batch

Method

Batch


Prepared

or Analyzed

Initial

Amount Amount

Final Batch

NumberFactor

Dil






Type

Batch

Method

Batch


Prepared

or Analyzed

Initial

Amount Amount

Final Batch

NumberFactor

Dil






Type

Batch

Method

Batch


Prepared

or Analyzed

Initial

Amount Amount

Final Batch

NumberFactor

Dil






Type

Batch

Method

Batch


Prepared

or Analyzed

Initial

Amount Amount

Final Batch

NumberFactor

Dil






Type

Batch

Method

Batch


Prepared

or Analyzed

Initial

Amount Amount

Final Batch

NumberFactor

Dil



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Analysis 8015B GRO LL AK103/11/19 21:471 TAL NSH579978

Type

Batch

Method

Batch


Prepared

or Analyzed

Initial

Amount Amount

Final Batch

NumberFactor

Dil

Total/NA 5 mL 5 mL




Type

Batch

Method

Batch


Prepared

or Analyzed

Initial

Amount Amount

Final Batch

NumberFactor

Dil






Type

Batch

Method

Batch


Prepared

or Analyzed

Initial

Amount Amount

Final Batch

NumberFactor

Dil






Type

Batch

Method

Batch


Prepared

or Analyzed

Initial

Amount Amount

Final Batch

NumberFactor

Dil


Analysis 8260B 1 579888 03/10/19 00:27 S1S TAL NSHTotal/NA 5 mL 5 mL





Type

Batch

Method

Batch


Prepared

or Analyzed

Initial

Amount Amount

Final Batch

NumberFactor

Dil


Analysis 8260B 1 579888 03/10/19 00:54 S1S TAL NSHTotal/NA 5 mL 5 mL



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Client Sample ID: 7-11 Potable (P.O.U) Lab Sample ID: 490-169885-11Matrix: WaterDate Collected: 03/07/19 15:00


Analysis 524.2 S1S03/09/19 19:531 TAL NSH579919

Type

Batch

Method

Batch


Prepared

or Analyzed

Initial

Amount Amount

Final Batch

NumberFactor

Dil


Client Sample ID: 124 Hanover INF Lab Sample ID: 490-169885-12Matrix: WaterDate Collected: 03/07/19 12:55



Type

Batch

Method

Batch


Prepared

or Analyzed

Initial

Amount Amount

Final Batch

NumberFactor

Dil


Client Sample ID: 124 Hanover GAC-1 EFF Lab Sample ID: 490-169885-13Matrix: WaterDate Collected: 03/07/19 12:52



Type

Batch

Method

Batch


Prepared

or Analyzed

Initial

Amount Amount

Final Batch

NumberFactor

Dil





Type

Batch

Method

Batch


Prepared

or Analyzed

Initial

Amount Amount

Final Batch

NumberFactor

Dil


Client Sample ID: 124 Hanover FINAL EFF Lab Sample ID: 490-169885-15Matrix: WaterDate Collected: 03/07/19 12:45



Type

Batch

Method

Batch


Prepared

or Analyzed

Initial

Amount Amount

Final Batch

NumberFactor

Dil


Laboratory References:

TAL NSH = TestAmerica Nashville, 2960 Foster Creighton Drive, Nashville, TN 37204, TEL (615)726-0177


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Method SummaryTestAmerica Job ID: 490-169885-1Client: AECOM


Method Method Description LaboratoryProtocol

EPA-DW524.2 Volatile Organic Compounds (GC/MS) TAL NSH

SW8468260B Volatile Organic Compounds (GC/MS) TAL NSH

SW8468015B GRO LL Gasoline Range Organics - (GC) TAL NSH

SW8465030B Purge and Trap TAL NSH

Protocol References:

EPA-DW = "Methods For The Determination Of Organic Compounds In Drinking Water", EPA/600/4-88/039, December 1988 And Its Supplements.

SW846 = "Test Methods For Evaluating Solid Waste, Physical/Chemical Methods", Third Edition, November 1986 And Its Updates.




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Accreditation/Certification SummaryClient: AECOM TestAmerica Job ID: 490-169885-1Project/Site: 32785.Hampstead.EL (MD) SDG: 125 Hanover Pike, Hampstead, MD

Laboratory: TestAmerica NashvilleAll accreditations/certifications held by this laboratory are listed. Not all accreditations/certifications are applicable to this report.

Authority Program EPA Region Identification Number Expiration Date

A2LA 0453.07ISO/IEC 17025 12-31-19

Alaska (UST) State Program 10 UST-087 06-30-19

Arizona State Program 9 AZ0473 05-05-19

Arkansas DEQ State Program 6 88-0737 04-25-19

California State Program 9 2938 06-30-19

Connecticut State Program 1 PH-0220 12-31-19

Florida NELAP 4 E87358 06-30-19

Georgia State Program 4 NA: NELAP & A2LA 12-31-19

Illinois NELAP 5 200010 12-09-18 *

Iowa State Program 7 131 04-01-20

Kansas NELAP 7 E-10229 10-31-19

Kentucky (UST) State Program 4 19 06-30-19

Kentucky (WW) State Program 4 90038 12-31-19

Louisiana NELAP 6 30613 06-30-19

Maine State Program 1 TN00032 11-03-19

Maryland State Program 3 316 03-31-19

Massachusetts State Program 1 M-TN032 06-30-19

Minnesota NELAP 5 047-999-345 12-31-19

Mississippi State Program 4 N/A 06-30-19

Nevada State Program 9 TN00032 07-31-19

New Hampshire NELAP 1 2963 10-09-19

New Jersey NELAP 2 TN965 06-30-19

New York NELAP 2 11342 03-31-19

North Carolina (WW/SW) State Program 4 387 12-31-19

North Dakota State Program 8 R-146 06-30-19

Ohio VAP State Program 5 CL0033 07-06-19

Oklahoma State Program 6 9412 08-31-19

Oregon NELAP 10 TN200001 04-26-19

Pennsylvania NELAP 3 68-00585 07-31-19

Rhode Island State Program 1 LAO00268 12-30-19

South Carolina State Program 4 84009 (001) 02-28-19 *

Tennessee State Program 4 2008 02-23-20

Texas NELAP 6 T104704077 08-31-19

USDA Federal P330-13-00306 12-01-19

Utah NELAP 8 TN00032 07-31-19

Virginia NELAP 3 460152 06-14-19

Washington State Program 10 C789 07-19-19

West Virginia DEP State Program 3 219 02-28-19 *

Wisconsin State Program 5 998020430 08-31-19

Wyoming (UST) A2LA 8 453.07 12-31-19


* Accreditation/Certification renewal pending - accreditation/certification considered valid.

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ANALYTICAL REPORTTestAmerica Laboratories, Inc.TestAmerica Nashville2960 Foster Creighton DriveNashville, TN 37204Tel: (615)726-0177

TestAmerica Job ID: 490-167860-1TestAmerica SDG: 125 Hanover Pike, Hampstead, MDClient Project/Site: 32785.Hampstead.EL

For:AECOM8000 Virginia Manor RoadSuite 110Beltsville, Maryland 20705

Attn: Ms. Rachael Allen

Authorized for release by:2/7/2019 5:41:47 PM

Jennifer Huckaba, Project Manager II(615)[email protected]

The test results in this report meet all 2003 NELAC and 2009 TNI requirements for accreditedparameters, exceptions are noted in this report. This report may not be reproduced except in full,and with written approval from the laboratory. For questions please contact the Project Managerat the e-mail address or telephone number listed on this page.

This report has been electronically signed and authorized by the signatory. Electronic signature isintended to be the legally binding equivalent of a traditionally handwritten signature.

Results relate only to the items tested and the sample(s) as received by the laboratory.

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https://secure.testamericainc.com/TotalAccess/login.aspx

http://www.testamericainc.com/AskTheExpert/Expert_index.htm

http://www.testamericainc.com


Table of Contents

Client: AECOMProject/Site: 32785.Hampstead.EL

TestAmerica Job ID: 490-167860-1SDG: 125 Hanover Pike, Hampstead, MD

Page 2 of 24TestAmerica Nashville

2/7/2019

Cover Page . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1

Table of Contents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2

Sample Summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

Case Narrative . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

Definitions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

Client Sample Results . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

QC Sample Results . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

QC Association . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

Chronicle . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

Method Summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21

Certification Summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22

Chain of Custody . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23

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Sample SummaryTestAmerica Job ID: 490-167860-1Client: AECOM

SDG: 125 Hanover Pike, Hampstead, MDProject/Site: 32785.Hampstead.EL

Lab Sample ID Client Sample ID ReceivedCollectedMatrix

490-167860-1 124 Hanover INF Water 01/31/19 16:33 02/02/19 10:20



490-167860-4 124 Hanover FINAL EFF (GAC) Water 01/31/19 16:25 02/02/19 10:20


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Case NarrativeClient: AECOM TestAmerica Job ID: 490-167860-1Project/Site: 32785.Hampstead.EL SDG: 125 Hanover Pike, Hampstead, MD

Job ID: 490-167860-1

Laboratory: TestAmerica Nashville

Narrative

Job Narrative490-167860-1

Comments

No additional comments.

Receipt

The samples were received on 2/2/2019 10:20 AM; the samples arrived in good condition, properly preserved and, where required, on ice.

The temperature of the cooler at receipt was 0.9º C.

Receipt Exceptions

One or more containers for the following samples were received broken or with headspace: 124 Hanover INF (490-167860-1), 124

Hanover GAC-1 EFF (490-167860-2), 124 Hanover GAC-2 EFF (490-167860-3) and 124 Hanover FINAL EFF (GAC) (490-167860-4).

124 Hanover INF - two vials received with headspace - no affect on the data. Still had 1 vial with no headspace.124 Hanover GAC-1 EFF - two vials were received broken.124 Hanover GAC-2 EFF - two vials were received broken.

124 Hanover FINAL EFF (GAC) - one vial was received broken, two vials received with headspace. The analyst determined the headspace to be >6mm in diameter and is noted below.

GC/MS VOA Method(s) 524.2: The following volatile sample was analyzed with significant headspace in the sample container(s): 124 Hanover FINAL

EFF (GAC) (490-167860-4). Significant headspace is defined as a bubble greater than 6 mm in diameter.

Method(s) 524.2: The RPD of the laboratory control sample (LCS) and laboratory control sample duplicate (LCSD) for batch analytical batch 490-573573 recovered outside control limits for the following analyte: 1,2,3-Trichloropropane.

Method(s) 524.2: The laboratory control sample duplicate (LCSD) for analytical batch 490-573573 recovered outside control limits for the following analyte: Bromomethane. This target was biased high in the LCSD and was not detected in the associated samples; therefore, the data has been reported.


TestAmerica NashvillePage 4 of 24 2/7/2019

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Definitions/GlossaryTestAmerica Job ID: 490-167860-1Client: AECOM


Qualifiers

GC/MS VOA

Qualifier Description

* RPD of the LCS and LCSD exceeds the control limits

Qualifier

* LCS or LCSD is outside acceptance limits.

J Result is less than the RL but greater than or equal to the MDL and the concentration is an approximate value.

Glossary

These commonly used abbreviations may or may not be present in this report.

¤ Listed under the "D" column to designate that the result is reported on a dry weight basis

Abbreviation

%R Percent Recovery

CFL Contains Free Liquid

CNF Contains No Free Liquid

DER Duplicate Error Ratio (normalized absolute difference)

Dil Fac Dilution Factor

DL Detection Limit (DoD/DOE)

DL, RA, RE, IN Indicates a Dilution, Re-analysis, Re-extraction, or additional Initial metals/anion analysis of the sample

DLC Decision Level Concentration (Radiochemistry)

EDL Estimated Detection Limit (Dioxin)

LOD Limit of Detection (DoD/DOE)

LOQ Limit of Quantitation (DoD/DOE)

MDA Minimum Detectable Activity (Radiochemistry)

MDC Minimum Detectable Concentration (Radiochemistry)

MDL Method Detection Limit

ML Minimum Level (Dioxin)

NC Not Calculated

ND Not Detected at the reporting limit (or MDL or EDL if shown)

PQL Practical Quantitation Limit

QC Quality Control

RER Relative Error Ratio (Radiochemistry)

RL Reporting Limit or Requested Limit (Radiochemistry)

RPD Relative Percent Difference, a measure of the relative difference between two points

TEF Toxicity Equivalent Factor (Dioxin)

TEQ Toxicity Equivalent Quotient (Dioxin)


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Benzene ND 0.500 ug/L 02/05/19 18:13 1





0.500 ug/L 02/05/19 18:13 1Bromoform ND

0.500 ug/L 02/05/19 18:13 1Bromomethane ND *






































0.500 ug/L 02/05/19 18:13 1Styrene ND







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0.500 ug/L 02/05/19 18:13 1Toluene ND









0.500 ug/L 02/05/19 18:13 11,2,3-Trichloropropane ND *









Toluene-d8 (Surr) 95 02/05/19 18:13 170 - 130


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Benzene ND 0.500 ug/L 02/05/19 16:53 1





0.500 ug/L 02/05/19 16:53 1Bromoform ND







































0.500 ug/L 02/05/19 16:53 1Styrene ND







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0.500 ug/L 02/05/19 16:53 1Toluene ND


















Toluene-d8 (Surr) 92 02/05/19 16:53 170 - 130


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Benzene ND 0.500 ug/L 02/05/19 17:20 1





0.500 ug/L 02/05/19 17:20 1Bromoform ND







































0.500 ug/L 02/05/19 17:20 1Styrene ND







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0.500 ug/L 02/05/19 17:20 1Toluene ND


















Toluene-d8 (Surr) 95 02/05/19 17:20 170 - 130


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Lab Sample ID: 490-167860-4Client Sample ID: 124 Hanover FINAL EFF (GAC)Matrix: WaterDate Collected: 01/31/19 16:25



Benzene ND 0.500 ug/L 02/05/19 17:46 1





0.500 ug/L 02/05/19 17:46 1Bromoform ND







































0.500 ug/L 02/05/19 17:46 1Styrene ND







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Lab Sample ID: 490-167860-4Client Sample ID: 124 Hanover FINAL EFF (GAC)Matrix: WaterDate Collected: 01/31/19 16:25





0.500 ug/L 02/05/19 17:46 1Toluene ND


















Toluene-d8 (Surr) 93 02/05/19 17:46 170 - 130


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Method: 524.2 - Volatile Organic Compounds (GC/MS)


RL MDL

Benzene ND 0.500 ug/L 02/05/19 12:24 1

MB MB


ND 0.500 ug/L 02/05/19 12:24 1Bromobenzene



ND 0.500 ug/L 02/05/19 12:24 1Bromoform















ND 0.500 ug/L 02/05/19 12:24 1Dibromomethane











ND 0.500 ug/L 02/05/19 12:24 11,1-Dichloropropene




ND 0.500 ug/L 02/05/19 12:24 1Hexachlorobutadiene





ND 0.500 ug/L 02/05/19 12:24 1n-Butylbenzene

ND 0.500 ug/L 02/05/19 12:24 1N-Propylbenzene

ND 0.500 ug/L 02/05/19 12:24 1p-Isopropyltoluene

ND 0.500 ug/L 02/05/19 12:24 1sec-Butylbenzene

ND 0.500 ug/L 02/05/19 12:24 1Styrene


ND 10.0 ug/L 02/05/19 12:24 1tert-Butyl alcohol

ND 0.500 ug/L 02/05/19 12:24 1tert-Butylbenzene



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RL MDL

1,1,2,2-Tetrachloroethane ND 0.500 ug/L 02/05/19 12:24 1

MB MB



ND 0.500 ug/L 02/05/19 12:24 1Toluene









ND 0.500 ug/L 02/05/19 12:24 11,2,3-Trichloropropane






MB MB




93 02/05/19 12:24 1Toluene-d8 (Surr) 70 - 130


Benzene 5.00 4.829 ug/L 97 70 - 130

Analyte

LCS LCS


Spike

Added

%Rec.

Limits

Bromobenzene 5.00 4.521 ug/L 90 70 - 130



Bromoform 5.00 3.913 ug/L 78 70 - 130







Chloroform 5.00 4.590 ug/L 92 70 - 130








Dibromomethane 5.00 4.472 ug/L 89 70 - 130


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Analyte

LCS LCS


Spike

Added

%Rec.

Limits










1,1-Dichloropropene 5.00 4.535 ug/L 91 70 - 130




Hexachlorobutadiene 5.00 4.518 ug/L 90 70 - 130


Methylene Chloride 5.00 4.209 J ug/L 84 70 - 130


Naphthalene 5.00 4.078 J ug/L 82 70 - 130

n-Butylbenzene 5.00 3.967 ug/L 79 70 - 130

N-Propylbenzene 5.00 4.295 ug/L 86 70 - 130

p-Isopropyltoluene 5.00 4.239 ug/L 85 70 - 130

sec-Butylbenzene 5.00 4.207 ug/L 84 70 - 130

Styrene 5.00 4.447 ug/L 89 70 - 130


tert-Butyl alcohol 50.0 51.72 ug/L 103 70 - 130

tert-Butylbenzene 5.00 4.170 ug/L 83 70 - 130




Toluene 5.00 4.529 ug/L 91 70 - 130









1,2,3-Trichloropropane 5.00 3.933 ug/L 79 70 - 130






Surrogate

99

LCS LCS




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Surrogate

94

LCS LCS




Benzene 5.00 5.153 ug/L 103 70 - 130 6 20

Analyte

LCSD LCSD


Spike

Added

%Rec.

Limits LimitRPD

RPD

Bromobenzene 5.00 4.859 ug/L 97 70 - 130 7 20

Bromochloromethane 5.00 5.362 ug/L 107 70 - 130 10 20

Bromodichloromethane 5.00 4.854 ug/L 97 70 - 130 7 20

Bromoform 5.00 4.448 ug/L 89 70 - 130 13 20

Bromomethane 5.00 6.745 * ug/L 135 70 - 130 9 20

Carbon disulfide 5.00 5.251 ug/L 105 70 - 130 6 20

Carbon tetrachloride 5.00 4.655 ug/L 93 70 - 130 8 20

Chlorobenzene 5.00 4.968 ug/L 99 70 - 130 4 20

Chlorodibromomethane 5.00 4.387 ug/L 88 70 - 130 8 20

Chloroethane 5.00 4.970 ug/L 99 70 - 130 3 20

Chloroform 5.00 5.169 ug/L 103 70 - 130 12 20

Chloromethane 5.00 5.826 ug/L 117 70 - 130 8 20



cis-1,2-Dichloroethene 5.00 4.946 ug/L 99 70 - 130 7 20

cis-1,3-Dichloropropene 5.00 4.773 ug/L 95 70 - 130 8 20

1,2-Dibromo-3-Chloropropane 5.00 4.040 ug/L 81 70 - 130 1 20

1,2-Dibromoethane (EDB) 5.00 4.849 ug/L 97 70 - 130 15 20

Dibromomethane 5.00 4.837 ug/L 97 70 - 130 8 20




Dichlorodifluoromethane 5.00 5.772 ug/L 115 70 - 130 12 20



1,1-Dichloroethene 5.00 4.621 ug/L 92 70 - 130 4 20




1,1-Dichloropropene 5.00 4.759 ug/L 95 70 - 130 5 20

Diisopropyl ether 5.00 5.233 ug/L 105 70 - 130 7 20

Ethylbenzene 5.00 4.792 ug/L 96 70 - 130 10 20

Ethyl tert-butyl ether 5.00 5.412 ug/L 108 70 - 130 12 20

Hexachlorobutadiene 5.00 4.197 ug/L 84 70 - 130 7 20

Isopropylbenzene 5.00 4.581 ug/L 92 70 - 130 7 20

Methylene Chloride 5.00 4.902 J ug/L 98 70 - 130 15 20

Methyl tert-butyl ether 5.00 4.809 ug/L 96 70 - 130 11 20

Naphthalene 5.00 4.151 J ug/L 83 70 - 130 2 20

n-Butylbenzene 5.00 4.208 ug/L 84 70 - 130 6 20


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N-Propylbenzene 5.00 4.449 ug/L 89 70 - 130 4 20

Analyte

LCSD LCSD


Spike

Added

%Rec.

Limits LimitRPD

RPD

p-Isopropyltoluene 5.00 4.300 ug/L 86 70 - 130 1 20

sec-Butylbenzene 5.00 4.352 ug/L 87 70 - 130 3 20

Styrene 5.00 4.836 ug/L 97 70 - 130 8 20

Tert-amyl methyl ether 5.00 5.371 ug/L 107 70 - 130 13 20

tert-Butyl alcohol 50.0 53.49 ug/L 107 70 - 130 3 20

tert-Butylbenzene 5.00 4.481 ug/L 90 70 - 130 7 20



Tetrachloroethene 5.00 4.653 ug/L 93 70 - 130 8 20

Toluene 5.00 4.890 ug/L 98 70 - 130 8 20

trans-1,2-Dichloroethene 5.00 5.222 ug/L 104 70 - 130 10 20

trans-1,3-Dichloropropene 5.00 4.431 ug/L 89 70 - 130 9 20





Trichloroethene 5.00 4.884 ug/L 98 70 - 130 6 20

Trichlorofluoromethane 5.00 4.673 ug/L 93 70 - 130 11 20

1,2,3-Trichloropropane 5.00 4.833 * ug/L 97 70 - 130 21 20



Vinyl chloride 5.00 5.429 ug/L 109 70 - 130 5 20

Xylenes, Total 10.0 9.620 ug/L 96 70 - 130 7 20


Surrogate

101

LCSD LCSD






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GC/MS VOA



Water 524.2490-167860-1 124 Hanover INF Total/NA



Water 524.2490-167860-4 124 Hanover FINAL EFF (GAC) Total/NA

Water 524.2MB 490-573573/7 Method Blank Total/NA

Water 524.2LCS 490-573573/3 Lab Control Sample Total/NA

Water 524.2LCSD 490-573573/4 Lab Control Sample Dup Total/NA


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Lab ChronicleClient: AECOM TestAmerica Job ID: 490-167860-1Project/Site: 32785.Hampstead.EL SDG: 125 Hanover Pike, Hampstead, MD

Client Sample ID: 124 Hanover INF Lab Sample ID: 490-167860-1Matrix: WaterDate Collected: 01/31/19 16:33



Type

Batch

Method

Batch


Prepared

or Analyzed

Initial

Amount Amount

Final Batch

NumberFactor

Dil





Type

Batch

Method

Batch


Prepared

or Analyzed

Initial

Amount Amount

Final Batch

NumberFactor

Dil





Type

Batch

Method

Batch


Prepared

or Analyzed

Initial

Amount Amount

Final Batch

NumberFactor

Dil


Client Sample ID: 124 Hanover FINAL EFF (GAC) Lab Sample ID: 490-167860-4Matrix: WaterDate Collected: 01/31/19 16:25



Type

Batch

Method

Batch


Prepared

or Analyzed

Initial

Amount Amount

Final Batch

NumberFactor

Dil





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Method SummaryTestAmerica Job ID: 490-167860-1Client: AECOM


Method Method Description LaboratoryProtocol

EPA-DW524.2 Volatile Organic Compounds (GC/MS) TAL NSH

Protocol References:

EPA-DW = "Methods For The Determination Of Organic Compounds In Drinking Water", EPA/600/4-88/039, December 1988 And Its Supplements.




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Accreditation/Certification SummaryClient: AECOM TestAmerica Job ID: 490-167860-1Project/Site: 32785.Hampstead.EL SDG: 125 Hanover Pike, Hampstead, MD

Laboratory: TestAmerica NashvilleUnless otherwise noted, all analytes for this laboratory were covered under each accreditation/certification below.

Authority Program EPA Region Identification Number Expiration Date

Maryland 3163State Program 03-31-19

The following analytes are included in this report, but the laboratory is not certified by the governing authority. This list may include analytes for which

the agency does not offer certification.

Analysis Method Prep Method Matrix Analyte

524.2 Water 1,1,1,2-Tetrachloroethane

524.2 Water 1,1,2,2-Tetrachloroethane

524.2 Water 1,1-Dichloroethane

524.2 Water 1,1-Dichloropropene

524.2 Water 1,2,3-Trichlorobenzene

524.2 Water 1,2,3-Trichloropropane

524.2 Water 1,2,4-Trimethylbenzene

524.2 Water 1,2-Dibromo-3-Chloropropane

524.2 Water 1,2-Dibromoethane (EDB)

524.2 Water 1,3,5-Trimethylbenzene

524.2 Water 1,3-Dichlorobenzene

524.2 Water 1,3-Dichloropropane

524.2 Water 2,2-Dichloropropane

524.2 Water 2-Chlorotoluene

524.2 Water 4-Chlorotoluene

524.2 Water Bromobenzene

524.2 Water Bromochloromethane

524.2 Water Bromomethane

524.2 Water Carbon disulfide

524.2 Water Chloroethane

524.2 Water Chloromethane

524.2 Water cis-1,3-Dichloropropene

524.2 Water Dibromomethane

524.2 Water Dichlorodifluoromethane

524.2 Water Diisopropyl ether

524.2 Water Ethyl tert-butyl ether

524.2 Water Hexachlorobutadiene

524.2 Water Isopropylbenzene

524.2 Water Methyl tert-butyl ether

524.2 Water Naphthalene

524.2 Water n-Butylbenzene

524.2 Water N-Propylbenzene

524.2 Water p-Isopropyltoluene

524.2 Water sec-Butylbenzene

524.2 Water Tert-amyl methyl ether

524.2 Water tert-Butyl alcohol

524.2 Water tert-Butylbenzene

524.2 Water trans-1,3-Dichloropropene

524.2 Water Trichlorofluoromethane


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ATTACHMENT B

MTBE Concentration Graphs Over Time

0

20

40

60

80

100

120

4/17/2011 6/5/2012 7/25/2013 9/13/2014 11/2/2015 12/21/2016 2/9/2018 3/31/2019

MTB

E Co

ncen

trat

ion

(µg/

L)

Date

MW-1 Dissolved MTBE Concentration Since System Start-up

MW-8 and MW-9 DeactivatedMW-8 and MW-9 ReactivatedAutomated Pulsing in MW-8 and MW-9 InitiatedMTBE (µg/L)System Deactivated and Began Rebound Assessment

October 8, 2013 Remediation system

start-up

October 7, 2015 Reactivated remediation

system

August 16, 2015 Deactivated remediation

system

February 4, 2016 Pulsing in MW-8 &

MW-9 initiated

0

1,000

2,000

3,000

4,000

5,000

6,000

7,000

8,000

9,000

10,000

7/6/2011 8/13/2012 9/21/2013 10/30/2014 12/8/2015 1/15/2017 2/23/2018 4/3/2019

MTB

E Co

ncen

trat

ion

(µg/

L)

Date



October 8, 2013 Remediation system start-up

October 7, 2015 Reactivated

remediation system


system


MW-9 initiated

0

200

400

600

800

1,000

1,200

1,400

10/18/2012 11/15/2013 12/13/2014 1/10/2016 2/6/2017 3/6/2018 4/3/2019

MTB

E Co

ncen

trat

ion

(µg/

L)

Date


MW-8 and MW-9 DeactivatedMW-8 and MW-9 ReactivatedAutomated Pulsing in MW-8 and MW-9 InitiatedMTBE (µg/L)System Deactivated and Began

October 8, 2013 Remediation

system start-up * MW-8 pumping

October 7, 2015 Reactivated remediation

system * MW-8 pumping


system


MW-9 initiated

0

50

100

150

200

250

300

350

400

450

500

1/31/2016 7/14/2016 12/26/2016 6/9/2017 11/21/2017 5/5/2018 10/17/2018 3/31/2019

MTB

E Co

ncen

trat

ion

(µg/

L)

Date

MW-8 Dissolved MTBE Concentration Since Start of System Pulsing


0

500

1,000

1,500

2,000

2,500

3,000

3,500

4,000

9/1/2013 10/14/2014 11/26/2015 1/7/2017 2/19/2018 4/3/2019

MTB

E Co

ncen

trat

ion

(µg/

L)

Date



October 8, 2013 Remediation system * MW-9 pumping


remediation system * MW-9 pumping

August 16, 2015 Deactivated

remediation system


MW-9 initiated

0

200

400

600

800

1,000

1,200

1,400

1/31/2016 7/14/2016 12/26/2016 6/9/2017 11/21/2017 5/5/2018 10/17/2018 3/31/2019

MTB

E Co

ncen

trat

ion

(µg/

L)

Date



0

50

100

150

200

250

9/1/2013 10/14/2014 11/26/2015 1/7/2017 2/19/2018 4/3/2019

MTB

E Co

ncen

trat

ion

(µg/

L)

Date


MW-8 and MW-9 Deactivated

MW-8 and MW-9 Reactivated

Automated Pulsing in MW-8 and MW-9 Initiated

MTBE (µg/L)

System Deactivated and Began Rebound Assessment

October 8, 2013 Remediation system start-up * MW-10 pumping


remediation system * MW-10 pumping

August 16, 2015 Deactivated

remediation system


MW-9 initiated

0

10

20

30

40

50

60

70

80

90

100

1/31/2016 7/14/2016 12/26/2016 6/9/2017 11/21/2017 5/5/2018 10/17/2018 3/31/2019

MTB

E Co

ncen

trat

ion

(µg/

L)

Date



ATTACHMENT C

Residential Treatment System Influent MTBE Concentrations Over Time

0

500

1,000

1,500

2,000

2,500

12/28/10 10/27/11 8/25/12 6/24/13 4/23/14 2/20/15 12/20/15 10/18/16 8/17/17 6/16/18 4/15/19

Conc

entr

atio

n (u

g/L)

Date

Potable Carbon Treatment System - Influent MTBE Concentrations Over Time124 Hanover Pike, Hampstead, MD

MTBE (µg/L)

Remediation SystemActivated on October8, 2013

ATTACHMENT D

Groundwater Drawdown Graphs (Pumping Wells)

MW-8Depth To Water Over Time

0.00

20.00

40.00

60.00

80.00

100.00

120.00

140.00

160.00

180.00

200.007/23/2013 4/9/2014 12/25/2014 9/11/2015 5/28/2016 2/12/2017 10/30/2017 7/17/2018 4/3/2019

Dep

th to

Wat

er (f

eet)

MW-8MW-8 and MW-9 DeactivatedMW-8 and MW-9 ReactivatedAutomated Pulsing in MW-8 and MW-9 InitiatedSystem Deactivated and Began Rebound Assessment

Date

Groundwater Remediation System Activated 10/8/13

August 16, 2015, AECOM deactivated the remediation system

February 4, 2016 Began deactivating and reactivating MW-8 and MW-9 pumps for two week periods

MW-9Depth to Water Over Time

0.00

20.00

40.00

60.00

80.00

100.00

120.00

140.00

160.00

180.007/23/13 4/9/14 12/25/14 9/11/15 5/28/16 2/12/17 10/30/17 7/17/18 4/3/19

Dept

h to

Wat

er (f

eet)


Date

Groundwater Remediation System Activated (10/8/13)



MW-10Depth to Water Over Time

0.00

20.00

40.00

60.00

80.00

100.00

120.00

140.00

160.00

180.007/23/13 4/9/14 12/25/14 9/11/15 5/28/16 2/12/17 10/30/17 7/17/18 4/3/19

Dep

th to

Wat

er (f

eet)


Date

Groundwater Remediation System Activated (10/8/13)



ATTACHMENT E

Air Stripper Influent MTBE and TPH-GRO Concentration Graphs Over Time

0

100

200

300

400

500

600

700

800

9/1/13 4/22/14 12/11/14 8/1/15 3/21/16 11/9/16 6/30/17 2/18/18 10/9/18

TPH-

GRO

Con

cent

ratio

n (u

g/L)

Date

Air Stripper InfluentTPH-GRO Concentration Over Time

Air Stripper Influent TPH-GRO ConcentrationMW-8 and MW-9 ReactivatedMW-8 and MW-9 DeactivatedAutomated Pulsing in MW-8 and MW-9 InitiatedSystem Deactivated and Began Rebound Assessment

May 6, 2014Warranty repairsdone on MW-9

August 16, 2015System deactivated for

rebound assessment

October 7, 2015System reactivated

February 4, 2016Began deactivating

and reactivatingMW-8 and MW-9

pumps for twoweek periods

AECOM 8000 Virginia Manor Road Suite 110 301.289.3901 fax ......Apr 04, 2019 · • Per MDE’s...

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