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

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1 AECOM tel 000 Virginia Manor Road Suite 0..0 fax Beltsville, Maryland 00 October, 0 Mr. Matt Mueller AECOM Project #: 0 Maryland Department of Environment Oil Control Program 00 Washington Blvd. Suite 0 Baltimore, Maryland 0- Subject: Third Quarter 0 Quarterly Monitoring Report Compliance Reporting Date: November, 0 -Eleven Store No. Hanover Pike Hampstead, MD Facility ID No. Case No CL Dear Mr. Mueller, On behalf of -Eleven, Inc. (-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 -Eleven and the Maryland Department of the Environment (MDE) dated March, 0. All ten on-site monitoring wells were sampled this period on September, 0. The on-site potable well was sampled on September, 0. Through this monitoring period, the monitoring wells were gauged monthly and sampled quarterly; the tank field wells were sampled quarterly when sufficient water was present; and the on-site potable well was sampled annually. This site is located within the High Risk Groundwater Use Area ; however, 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, 00. As directed by MDE, AECOM installed a point-of-entry treatment (POET) system on the Hanover Pike potable well on May, 0; through this monitoring period, AECOM sampled the system bimonthly. 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, 0. Per MDE s Approval of Rebound Assessment Request directive letter dated July, 0, the remediation system was shut down on August, 0. While the remediation system was in operation, AECOM was conducting quarterly sampling of the monitoring and tank field wells. Per MDE s July, 0 directive letter, sampling of the monitoring wells will be conducted on a monthly basis for the first three months following system shutdown (September, October, and November 0), and quarterly thereafter (beginning December 0). The next scheduled quarterly event is for December 0. Sampling frequency of the on-site potable well will be increased from annually to quarterly, and sampling of the off-site potable well at Hanover Pike will be increased from bimonthly to monthly for three months (September, October, and November 0), and bimonthly thereafter (beginning January 0). During this monitoring period, AECOM maintained and operated the groundwater recovery system per the MDE approved Corrective Action Plan (CAP) with revisions. The system was started in October 0; monthly system performance reports were submitted to MDE in December 0 and January and # Hampstead, Maryland Third Quarter 0 October 0

2 AECOM February 0. On November, 0, AECOM reconfigured the pumps in monitoring wells MW- and MW- to begin pumping when the water level reaches feet (ft) in MW- and 0 ft. in MW- and to stop pumping when the water level reaches the bottom of the pumps. This approach allowed 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. On June, 0, AECOM requested to shut down the remediation system and begin a rebound assessment. MDE required AECOM to collect potable drinking water samples from the nearby properties that were previously sampled before shutting down the remediation system. AECOM was able to collect samples from all but one of the properties between August, 0 and August, 0. Per MDE approval, the groundwater remediation system was deactivated on August, 0 to begin the rebound assessment. If you have any questions, please contact the undersigned at (0) -00. Yours sincerely, Matt Emery Environmental Scientist Matthew.Emery@aecom.com Rachael Allen Project Manager Rachael.Allen@aecom.com Marie Treiber Regional Senior Project Manager Marie.Treiber@aecom.com Attachments: Figure Groundwater Elevation Map Shallow Wells, September, 0 Figure Dissolved-Phase Hydrocarbon Concentration Map, September, 0 Table Depth to Water and Groundwater Elevation of Monitoring Wells Table Groundwater Analytical Results of Monitoring Well Sampling Table Hanover Pike Sampling Results Table Residential Potable Well Sampling Results Table Pumping Wells Groundwater Analytical Results Table Groundwater Remediation System Performance Data Table Summary of Treatment System Analytical Results Attachment A Monitoring Well Laboratory Reports Attachment B MTBE Concentration Graphs Over Time Attachment C Residential Treatment Potable Well Lab Reports Attachment D Residential Treatment System Influent MTBE Concentrations Over Time Attachment E Groundwater Drawdown Graphs (Pumping Wells) Attachment F Groundwater Treatment System Laboratory Reports Attachment G Air Stripper Influent MTBE and TPH-GRO Concentration Graphs Over Time cc: -Eleven Project File # Hampstead, Maryland Third Quarter 0 October 0

3 AECOM QUARTERLY MONITORING REPORT- THIRD QUARTER 0 -ELEVEN STORE NO. Hanover Pike Hampstead, MD Facility ID No. Case No CL AECOM Project 0 Compliance Reporting Date November, 0 AECOM Contacts: Rachael Allen, Project Manager Marie Treiber, Regional Senior Project Manager -Eleven, Inc. Contact: Jose Rios, Manager, Environmental Services CURRENT SITE STATUS The site is an active -Eleven convenience store and retail gasoline facility. Currently, ten monitoring wells, two tank field wells, and four shallow injection wells are located on the site. Through this sampling period, the monitoring wells were gauged monthly and sampled quarterly; the tank field wells were gauged and sampled quarterly when sufficient water was present. The on-site potable well was sampled annually as directed by the Maryland Department of the Environment (MDE). 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. The shallow injection wells were used in an Enhanced Bio-Augmentation Pilot Test through November 0. Through this sampling period, the potable well and treatment system at Hanover Pike was sampled bimonthly and monthly at the directive of MDE. Per MDE-approved Corrective Action Plan (CAP) with revisions, the groundwater extraction and treatment system began operations in October 0. AECOM deactivated the remediation system on August, 0 to begin another controlled rebound assessment according to the Rebound Assessment Monitoring Plan submitted and approved by MDE. # Hampstead, Maryland Third Quarter 0 October 0

4 AECOM PAST ACTIVITIES Two USTs (RUL # and PUL #) and associated UST system were installed at the site in March 000. On July, and, 00, AECOM installed three monitoring wells (MW- through MW-) at the site to meet the requirements set forth in MDE s Emergency Oil Pollution and Tank Management Regulations, effective January, 00. COMAR requires installation of a minimum of three monitoring wells outside of the UST tank field for release detection and determination of groundwater flow direction at the site. On September, 00, AECOM submitted a Monitoring Well Installation and Observation Report to MDE. ENSR on behalf of -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- and MW-. On October, 00, MDE issued a directive letter approving installation of two additional monitoring wells at the site. MDE requested a self-audit of the underground storage tank (UST) system. MDE also required completion of a receptor survey, including review of all well completion records within a ½-mile radius of the site. On November, 00, -Eleven submitted to MDE the results of an UST system self audit conducted October, 00. On November and, 00, AECOM installed two additional monitoring wells (MW- and MW-) at the site. On January, 00, AECOM submitted the results of the receptor survey to MDE. On August, 00, MDE issued a directive letter requesting a Supplemental Work Plan, detailing a plan to define the extent of petroleum hydrocarbons in the soil and groundwater and to determine if there was any off-site migration of either liquid or dissolved-phase hydrocarbons. Further, the letter requested submittal of an Interim Corrective Action Plan (CAP), evaluating subsurface vapors in the vicinity of the active UST field, and determining the most efficient and effective means of reducing the vapors should they be present in the vicinity of the active UST field and on-site monitoring well MW-. On October, 00, AECOM submitted the Supplemental Work Plan and Interim CAP requested in MDE s August, 00 directive letter. The Interim CAP included a discussion of potential remediation and mitigation of contamination at the site through soil vapor extraction (SVE), as requested by MDE, while the Supplemental Work Plan entailed the use of geoprobe direct push technology to install borings and collect soil and groundwater samples. On January, 00, MDE issued an approval letter, indicating that they were in agreement with the proposed plans. Further, MDE requested several additional items, including an increase in frequency of groundwater sampling from a semi-annual schedule to a quarterly schedule for the onsite monitoring wells and tank field wells, with the on-site potable well to remain on the current semiannual sampling schedule. All monitoring well and tank field well samples were to continue to be analyzed for full-suite volatile organic compounds (VOCs) via EPA Method 0B (also including fuel oxygenates) and total petroleum hydrocarbons via EPA method 0B (diesel and gasoline range organics). The potable samples were to continue to be analyzed for full-suite VOCs via EPA Method. (including fuel oxygenates). On February 0, 00, AECOM submitted a request for modification to and/or postponement of MDE s increased scope requirements in light of the January 00 sampling results, historical analytical data and the groundwater flow direction on site. Since sampling was initiated in July 00, MTBE concentrations in the up-gradient well MW- steadily decreased from,000 ug/l to # Hampstead, Maryland Third Quarter 0 October 0

5 AECOM below laboratory detection limits in the January 00 sampling event. Additionally, MTBE concentrations in all sampled wells were below the MDE guideline of 0 μg/l during the January 00 event. ENSR proposed that current site monitoring be increased to quarterly (with the exception of the on-site potable well which would remain semi-annual), as recommended by MDE in their January, 00 letter, and recommended delayed completion of a Site Investigation Work Plan and a Site Conceptual Model. On April, 00, MDE issued a directive letter, temporarily delaying completion of a Site Investigation Work Plan and a Site Conceptual Model pending the results of the Interim CAP. On July, 00, six off-site private supply wells were sampled at the request of MDE. The six private supply wells were located in the immediate area of the -Eleven facility, including,,,, 0 and Hanover Pike. MTBE was detected at concentrations of 0. microgramsper-liter (µg/l),. µg/l, µg/l and 0. µg/l at,, and Hanover Pike. MTBE was below laboratory detection limits at and 0 Hanover Pike. All other VOCs, including benzene, toluene, ethylbenzene and xylene (BTEX), were non-detect () in each of the private supply wells sampled. On July 0, 00 a confirmation sample was collected from Hanover Pike, per MDE directive. The analytical results indicated an MTBE concentration of 0 µg/l. On July, 00, MDE issued a directive for a Corrective Action Plan (CAP). Based on discussions with the MDE the CAP was to be prepared after additional monitoring wells were installed and feasibility testing could be completed. A Delineation Work Plan for the installation of three additional monitoring wells was submitted to the MDE on August, 00 and was approved October, 00. On November -, 00, three monitoring wells (one shallow and two deep wells) were installed. On December and, 00, geophysical testing was performed on the two deep wells. This survey was conducted in order to better define the fracture orientation, evaluate water-bearing zones and evaluate remedial strategies. On March, 00, AECOM reviewed MDE files related to the former Crown Station (Case #00-0 CL) located at 0 Hanover Pike. Geologic and sampling data were reviewed for possible relationships to the project site. On March, 00, AECOM submitted an Enhanced Bio-Augmentation Pilot Test Work Plan to MDE, including installation of four -inch injection wells, Inj- to Inj-, in the vicinity of monitoring well MW-. On August, 00, MDE approved the Enhanced Bio-Augmentation Pilot Test Work Plan and requested sampling of and 0 Hanover Pike potable wells (pre-, mid-, and post-monitoring period). On September and, 00, four diameter injection wells (INJ- through INJ-) were installed and developed in the area of MW-, as proposed in the Enhanced Bio-Augmentation Pilot Test Work Plan. On October, 00, conduits connecting the wells and to a future storage tank were installed, and the wells were completed with manholes. These wells and the piping system will be used to determine the feasibility of subsurface injection of bio-remediation products. # Hampstead, Maryland Third Quarter 0 October 0

6 AECOM On April, 0, AECOM began bio-remediation injections as part of the Enhanced Bio- Augmentation Pilot Test; results are summarized in Bio-Augmentation Reports under separate cover. On May, 0, per MDE, AECOM installed a carbon treatment system on the potable well located at Hanover Pike. On June through, 0, AECOM installed two deep monitoring wells (MW- and MW-). The wells were installed as part of the preparation of the Corrective Action Plan to help delineate the bedrock aquifer. On January, 0, per discussions with MDE, AECOM installed an ISOC in well INJ-, one of the two injection wells (INJ- and INJ-), to enhance the bioremediation activity at the site. An ISOC could not be placed into well INJ- due to frozen lines. In December 0 through February 0, bio-remediation injections were postponed due to freezing conditions. On March, 0, MDE issued an Administrative Consent Order to -Eleven, detailing the regulatory-mandated activities and reporting schedules for the site. As directed by MDE in their June, 0 correspondence, samples collected from the treatment system located at Hanover Pike will be sampled for Nitrate and Nitrite via EPA method. and Orthophosphate via EPA method. in alternating months. Further, well MW- will be added to the monthly gauging and DO monitoring schedule effective immediately. On March, 0, AECOM prepared and submitted a work plan to conduct a -hour continuous pump test from either monitoring well MW- or MW-. It was approved by MDE on May, 0. The approval letter indicated that no later than August, 0, a comprehensive report explaining the results of the pumping test activities must be submitted, which also needed to include a revised schedule for the submittal/implementation of a CAP. On March, 0, AECOM submitted a Notice of Intent (NOI) request for authorization to discharge treated groundwater under a general discharge permit, MDE approved this request on May, 0. On May, 0, AECOM, on behalf of -Eleven, sub mitted an application to the MD-SHA District Office for a District Office (DO) permit to discharge groundwater treated on site into a stormwater retention pond located adjacent to the property. This request was approved in a directive letter dated August, 0. On August, 0, AECOM submitted a request for an extension of the submittal date for the Pumping Test Summary Report to September, 0, which was subsequently approved by Jim Richmond of MD-SHA. As approved by MDE, the Maryland State Highway Administration (MD-SHA) District Office, and as permitted by the District Office (DC), a -hour continuous pump test from monitoring well MW- was performed on October, 0. On December, 0, a Corrective Action Plan including the pump test results was submitted to MDE. MDE approved the CAP in a letter dated February 0, 0. AECOM was required to submit a contingency plan (within days of the CAP Approval letter) which will outline the procedures under which operation of the groundwater remediation system will continue, in the event that site conditions change, which may require alternative methods of wastewater disposal. # Hampstead, Maryland Third Quarter 0 October 0

7 AECOM On May, 0, AECOM submitted the contingency plan for approval. On October, 0, AECOM performed the startup and shakedown of the groundwater remediation system. On May, 0, SCE, under the oversight of AECOM, performed warranty repairs on the fittings associated with the equipment installed in well MW-. On August, 0, as approved by the MDE in the directive letter dated August, 0, AECOM deactivated the groundwater remediation system to complete a controlled rebound assessment to evaluate the non-pumping petroleum contaminate concentrations. On October, 0, AECOM reactivated the groundwater remediation system based on the September, 0 groundwater sampling results. On February, 0 AECOM began pulsing the recovery wells; deactivating pumps in wells MW- and MW- for two week periods to complete a rebound assessment in wells MW-, MW-, and MW-. On September, 0, AECOM submitted a letter to MDE requesting to deactivate the groundwater remediation system to perform a rebound assessment. On December, 0, as approved by the MDE in the directive letter dated November, 0, AECOM deactivated the groundwater remediation system to complete a controlled rebound assessment to evaluate the non-pumping petroleum contaminate concentrations. The system was reactivated on December, 0 due to freezing temperatures. On December, 0 the system was deactivated and drained to prevent freezing. On December, 0, AECOM reactivated the groundwater remediation system based on the December, 0 groundwater sampling results. On August, 0, as approved by the MDE in the directive letter dated August, 0, AECOM deactivated the groundwater remediation system to complete a controlled rebound assessment to evaluate the non-pumping petroleum contaminate concentrations. AECOM reactivated the groundwater remediation system on October, 0 due to elevated MTBE concentrations in MW- ( μg/l). On November, 0, AECOM reconfigured the pumps in monitoring wells MW- and MW- to begin pumping when the water level reaches feet (ft) in MW- and 0 ft. in MW- and to stop pumping when the water level reaches the bottom of the pumps. On June, 0, AECOM submitted a letter to MDE requesting to deactivate the groundwater remediation system to perform a rebound assessment. On July, 0, MDE approved the system deactivation and rebound assessment contingent upon AECOM collecting potable drinking water samples from the nearby properties that were previously sampled. On August,, and, 0, AECOM collected potable drinking water samples from the nearby properties. # Hampstead, Maryland Third Quarter 0 October 0

8 AECOM On August, 0, AECOM deactivated the groundwater remediation system and began the rebound assessment. ACTIVITIES THIS PERIOD Monitoring Period: July through September 0 Site Visit(s): July and 0; August,,,, and ; and September, 0. Field Activities: Depth-to-Water: Liquid-Phase Hydrocarbons: Number of Wells/ Wells Sampled: Activities included system operation and maintenance (O&M) visits (July and August only), monthly gauging of the monitoring and tank field wells, quarterly sampling of the monitoring and tank field wells, on-site potable well sampling, potable system sampling at Hanover Pike, potable well sampling at Phillips Drive, Hanover Pike, Hanover Pike, Hanover Pike, 0 Hanover Pike, and Hanover Pike. On September, 0, depth-to-water in wells under non-pumping conditions ranged from. feet below ground surface (bgs) in well MW- to. feet bgs in well MW-. In the three pumping wells (MW-, MW-, and MW-), depth-to-water ranged from 0. feet bgs in well MW- to 0.0 feet bgs in well MW- (non-pumping conditions). A groundwater elevation map for the shallow wells is shown as Figure and historical groundwater elevations are listed in Table. Bedrock and shallow groundwater flow is historically toward the southeast; shallow groundwater flow was to the east during this reporting period. A groundwater elevation map was not created for the bedrock wells due to three of the wells working under pumping/non-pumping conditions. No liquid petroleum hydrocarbon (LPH) has been observed at the site. The ten on-site monitoring wells were sampled during this period on September, 0. The two tank field wells could not be sampled because they were either dry or lacked sufficient water for sampling (Table, Figure and Attachment A). Samples were collected from the point-of-entry treatment (POET) system of the potable well servicing Hanover Pike this period on July, 0 and September, 0. Historical analytical results are provided in Table. Samples were also collected from Phillips Drive, Hanover Pike, Hanover Pike, Hanover Pike, 0 Hanover Pike, and Hanover Pike this period between August, 0 and August, 0. Historical analytical results for nearby residential wells are provided in Table. # Hampstead, Maryland Third Quarter 0 October 0

9 AECOM ANALYTICAL SUMMARY Groundwater Groundwater samples were collected on September, 0 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 0, and total petroleum hydrocarbon gasoline range organics (TPH-GRO) via EPA Method 0. 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. μg/l was reported in monitoring well MW- (pumping well), a decrease from. μg/l during the last reporting period. The dissolved-phase MTBE concentration in MW- was. μg/l, a decrease from. μg/l during the 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- and MW-. There have been no detections in these wells since June 0 and May 0, respectively. With the exception of toluene detection in December 0, concentrations of all analytes have remained below detection limits in monitoring well since March 0. Monitoring well MW- reported a MTBE concentration below the laboratory detection limit for the third consecutive quarter. Monitoring well MW- reported a MTBE concentration below the laboratory detection limit for the first time. The concentrations in MW- and MW- have displayed an overall decreasing trend since December 0. 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, Table, and Attachment A. MTBE concentration trend graphs are provided as Attachment B. -Eleven Potable Well Annual sampling of the on-site potable well was conducted on September, 0. All analytes reported concentrations below detection limits. The analytical data is summarized in Table and the laboratory analytical report is included as Attachment C. 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 in December 0. Residential Treatment Potable Well Samples were collected from the POET system of the potable well servicing Hanover Pike this quarter on July, 0 and September, 0. The system was sampled bimonthly (pre-, mid-, and final effluent); the samples are analyzed for total VOCs plus oxygenates via EPA Method.. 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 0, 0, February, 0, June, 0, February, 0, June, 0 and December, 0. Historically, no VOCs, including MTBE, have been detected above laboratory detection limits in the final effluent. As part of the post-remediation monitoring, sampling frequency for the Hanover Pike potable well has been increased to monthly for three months (September, October, and November 0), then returning # Hampstead, Maryland Third Quarter 0 October 0

10 AECOM to bimonthly in December 0. Residential treatment well sampling results are included in Table and Attachment C. A graph depicting influent MTBE concentrations in the potable well located at Hanover Pike over time is provided as Attachment D. Residential Non-Treatment Potable Wells In accordance with the MDE directive letter dated July, 0, potable water samples were collected from six residential properties during this quarter. Samples were collected from the following properties: Phillips Drive Hanover Pike Hanover Pike Hanover Pike 0 Hanover Pike Hanover Pike Reconnaissance of the area has revealed that there is no property associated with Hanover Pike. Residential sampling conducted by AECOM in June 0 indicated that a sample was collected from Hanover Pike, however, based on review of the field notes it has been determined that the sample was collected from Hanover Pike and erroneously recorded as Hanover Pike. After several attempts, AECOM was not able to contact the owner of Phillips Drive and therefore, a sample was not collected from the property. Samples collected were analyzed for full suite VOCs, including fuel oxygenates and naphthalene, using EPA Method.. As indicated by the analytical results, the water samples collected from the six potable wells reported all VOCs below the laboratory reporting limits. The analytical data is summarized in Table and the laboratory analytical reports are included as Attachment C. REMEDIATION SYSTEM SUMMARY AECOM began installation of the ex-situ groundwater extraction and treatment system at the site on August, 0. System startup and shakedown took place on October, 0 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- from the system. Electric submersible pumps have been installed in monitoring wells MW-, MW- and MW- at depths of 0 feet (ft), ft, and ft from the top-of-casing, respectively. All extracted groundwater is treated through an air stripper, two particulate filters, and two 00-pound granular activated carbon (GAC) units prior to discharge. The treated groundwater is discharged to the stormwater collection system on the -Eleven property. The treated groundwater is 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. In accordance with the MDE CAP Approval letter and Discharge Monitoring Reporting requirements dated February 0, 0, AECOM samples the remediation system effluent twice monthly and completes 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. # Hampstead, Maryland Third Quarter 0 October 0

11 AECOM In accordance with the MDE directive letter dated August, 0, 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, 0, AECOM reactivated the groundwater treatment system on October, 0. Based upon evaluation of the system deactivation from August, 0 to September, 0 and the elevated MTBE concentrations, AECOM began pulsing recovery wells MW- and MW- by deactivating the pumps for two week periods on February, 0. 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-, MW- and MW- before and after each two week pulsing period. Groundwater analytical results for monitoring wells MW-, MW- and MW- since the initial deactivation in August 0 are included as Table and MTBE concentration graphs since initial remediation system start-up are provided as Attachment B. In accordance with the MDE directive letter dated November, 0, AECOM deactivated the groundwater treatment system on December, 0 in order to complete a controlled rebound assessment to evaluate the non-pumping petroleum contaminant concentrations. AECOM reactivated the system on December, 0 due to freezing temperatures. The system was deactivated and drained to avoid freezing on December, 0. Based on the December, 0 sampling results, the system was reactivated on December, 0. 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, 0. AECOM deactivated the remediation system on August, 0 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 Hanover Pike on a monthly basis (August/September, 0). AECOM on behalf of -Eleven submitted monthly progress reports of the results of the rebound assessment as required (August 0). AECOM sampled the monitoring well network and the private drinking water supply well at Hanover Pike on August, 0 and September 0, 0 as part of the rebound assessment. MTBE concentrations for MW- ( μg/l) exceeded the 00 μg/l threshold value in the samples collected on September 0, 0. Based on these results, AECOM reactivated the groundwater remediation system on October, 0. On November, 0, AECOM reconfigured the pumps in monitoring wells MW- and MW- to begin pumping when the water level reaches feet (ft) in MW- and 0 ft. in MW- 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, 0 to begin another controlled rebound assessment according to the Approval of Rebound Assessment Request letter from MDE dated July, 0. During the monitoring period, AECOM will collect samples from the monitoring well network and the private drinking water supply well at Hanover Pike on a monthly basis for the first three months, then quarterly thereafter for the monitoring wells. The potable well at Hanover Pike will then be sampled bimonthly. The groundwater remediation system will remain inactive as long as contaminant concentrations remain stable and/or on a decreasing trend and MTBE remains below 00 μg/l. The remediation system was initially started on October, 0 and a total of,,0 gallons of treated groundwater have been discharged,, of which were discharged from the system during this reporting period (July through September 0). Groundwater extraction data is provided in Table and a summary of quarterly system performance data is displayed in the table below. # Hampstead, Maryland Third Quarter 0 October 0

12 AECOM Average Pumping Rate (GPM) MW- MW- MW- Gallons Recovered Average Pumping Rate (GPM) Gallons Recovered Average Pumping Rate (GPM) Gallons Recovered Q-0., 0.,.0,0 Q-0 0.0, 0.0,.0, Q-0 0.,0 0.,., Q , 0.,0.,0 Q-0 0.,0 0.,. 0, Q-0 0., 0. 0,0., Q-0 0., 0.,., Q-0 0., 0.,.,0 Q-0 0., 0. 0,.,0 Q , 0.,., Q-0 0.,0 0. 0,.0, Q-0 0.0, 0.,. 0,0 Q-0 0.,0 0.,., Q-0 0., 0.,., Q-0 0., 0.0,., Q ,0 Q-0 0., 0.,., Q-0 0., 0.,0., Q-0 0., 0.,., Q-0 0.,0 0.,., Totals: 0.,, 0.,.00,, Note: Flow restriction issues resulted in the inoperability of the pump in MW- from // through //. Depth-to-water during this quarter in monitoring well MW- ranged from 0. feet bgs on September, 0 (non-pumping conditions) to. feet bgs on July 0, 0 (pumping conditions). Depth-towater during this quarter in monitoring well MW- ranged from 0. feet bgs on September, 0 (non-pumping conditions) to. feet bgs on July 0, 0 (pumping conditions). Depth-to-water during this quarter in monitoring well MW- ranged from 0.0 feet bgs on September, 0 (nonpumping conditions) to. feet bgs on August, 0 (pumping conditions). Groundwater drawdown graphs of the pumping wells MW-, MW- and MW- are provided in Attachment E. Groundwater Treatment System Analytical Summary Air stripper influent and effluent samples and GAC effluent samples were collected and submitted for laboratory analysis on July and 0, 0 and August and, 0. All analytes in the air stripper influent and all analytes in the air stripper effluent and the GAC effluent revealed concentrations below detection limits during the six sampling events this quarter, with the exception of MTBE in the air stripper influent on July, 0 (.0 μg/l), July 0, 0 (.0 μg/l), August, 0 (.0 μg/l), and August, 0 (. μg/l). System final effluent (GAC ) samples were collected on July and 0, 0, and August and, 0, the results of which revealed all analyte parameters below detection limits. A summary of the analytical results are provided in Table. Laboratory reports are provided in Attachment F. Graphs depicting the air stripper MTBE and TPH-GRO influent concentrations over time are provided in Attachment G. # Hampstead, Maryland Third Quarter 0 October 0

13 AECOM Summary Based on historical analytical data and groundwater flow direction, dissolved-phase MTBE was initially concentrated in the area near the tank field (MW- and MW-). MTBE concentrations in well MW- have dropped nearly two orders of magnitude since the well was sampled in July 00. MTBE continues to remain below the detection limit (BDL) in monitoring wells MW-, MW-, MW-, MW-, MW-, MW- and MW-. Decreasing trends are observed in monitoring wells MW-, MW- and MW-. All dissolved-phase gasoline compounds in bedrock well MW- have reported concentrations below detection limits since June 0. All dissolved-phase gasoline compounds in bedrock well MW- have reported concentrations below detection limits since May 0. MTBE concentrations in bedrock well MW- decreased this quarter and has shown an overall decreasing trend since June 0. Furthermore, MTBE influent concentrations in the potable well servicing Hanover Pike have remained below detection limits since June 0. On November, 0, AECOM reconfigured the pumps in monitoring wells MW- and MW- to begin pumping when the water level reaches feet (ft) in MW- and 0 ft. in MW- and to stop pumping when the water level reaches the bottom of the pumps. This approach allows for groundwater to fully recharge and flush potential petroleum compounds in the soil column above the areas that are dewatered during continuous operation of the recovery wells. Per MDE approval, the groundwater remediation system was deactivated on August, 0 to begin the rebound assessment. During the rebound assessment, all monitoring wells and the potable well at Hanover Pike will be sampled on a monthly basis for the first three months. The groundwater remediation system will remain inactive as long as contaminant concentrations remain stable and/or on a decreasing trend and MTBE remains below 00 μg/l. # Hampstead, Maryland Third Quarter 0 October 0

14 AECOM ACTIVITIES FOR THE FOURTH QUARTER 0 October 0 Continue System Rebound Assessment. Conduct monthly sampling of monitoring wells and the potable well at Hanover pike treatment system; complete carbon change of Hanover Pike potable well treatment system as necessary; conduct monthly well gauging. November 0 Continue System Rebound Assessment. Conduct monthly sampling of monitoring wells and the potable well at Hanover pike treatment system; complete carbon change of Hanover Pike potable well treatment system as necessary; conduct monthly well gauging. December 0 Continue System Rebound Assessment. Conduct quarterly sampling of monitoring and tank field wells and the on-site potable well; complete carbon change of Hanover Pike potable well treatment system as necessary; conduct monthly well gauging. # Hampstead, Maryland Third Quarter 0 October 0

15 FIGURES

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17

18 TABLES

19 Table : Depth to Water and Groundwater Elevation of Monitoring Wells -Eleven Store No. Hampstead, Maryland Well Top of Casing Date Depth to Water (ft bgs) Corrected Elevation MW-. //0..0 //0. 0. Installed //0 //0.. Total depth ' // Screened ' to ' //0.0. " casing;.00 slot screen //0..0 //0.. /0/0.. //0.0. //0.0.0 //0.. //0.. //0. 0. //0.. //0.. //0.. //.. //.. //.. //.0.0 //.. //..0 //.. //.. //. 0. //. 0. //.0. //.. //..0 //.. /0/.. //.0. //.. //.. //..00 //.. //..0 //. 0. //..0 //.. //..0 //.0. //.0. //.0. //.0. //.. /0/.. //.. //.. //.0 0. //.. //. 0. //. 0. //.0.0 //.. //. 0. //. 0.0 //.. //.. // NA -- //.00. // 0.. //.0.0 page of

20 Table : Depth to Water and Groundwater Elevation of Monitoring Wells -Eleven Store No. Hampstead, Maryland Well Top of Casing Date Depth to Water (ft bgs) Corrected Elevation //.0. //.. //.0.0 //..0 //.. //.. //.. //.0. //.. // NA -- //.. //.. //.. //.. //.. //.. //.. /0/. 0. //.. //.. /0/.. // NG NG // 0.. /0/.. //.0. //..0 //..0 //.. //. 0.0 //.. //.. //.0 0. //. 0. //.. //.. //.. //.0. //.0. //.. //.. /0/. 0. //. 0. //.00. //..00 //..0 //..0 //. 0.0 /0/.. /0/.0. //.. /0/.. //.. //.. page of

21 Table : Depth to Water and Groundwater Elevation of Monitoring Wells -Eleven Store No. Hampstead, Maryland Well Top of Casing Date Depth to Water (ft bgs) Corrected Elevation MW-. //0.0.0 //0. 0. Installed //0 //0. 0. Total depth ' //0.. Screened ' to ' //0 0.. " casing;.00 slot screen //0. 0. //0.. /0/0..0 //0..0 // // //0.0.0 //0.. //0. 0. //0. 0. //0..0 //.. //.. //.. // 0.. //.. //.0. //. 0.0 //.. //..0 //.. //..0 //. 0. //.. //.. /0/.. //.. //.. //..0 //.. //. 0. //.0 0. //.. //.. //.. //. 0. //. 0. //..00 //.. //.0.0 //.. /0/.. //.0 0. //..00 //.. // 0.. //.. //.. //.. //.. //.. //..0 //.. //.. //.. //.. //. 0. //.. page of

22 Table : Depth to Water and Groundwater Elevation of Monitoring Wells -Eleven Store No. Hampstead, Maryland Well Top of Casing Date Depth to Water (ft bgs) Corrected Elevation //.0. //.. //.. //.0 0. //.00. // 0.. // 0.. // 0.0. //.. // 0.0. //..0 //.0. // 0.. // 0.. //..0 //.. //.0. /0/.. //.. //.. /0/.0. //.. //.. /0/.0 0. //. 0.0 // 0.. //.. // 0.. //.. //.. //.0. //..0 //.. // 0.. //.. // 0..0 //.. //.0. //.. //.. /0/.. //.. //.. //.. //..0 //.. //.. /0/.0. /0/..0 //.. /0/..0 //.. //.. page of

23 Table : Depth to Water and Groundwater Elevation of Monitoring Wells -Eleven Store No. Hampstead, Maryland Well Top of Casing Date Depth to Water (ft bgs) Corrected Elevation MW-. //0.0. //0. 0. Installed //0 //0.. Total depth ' //0..0 Screened ' to ' //0.. " casing;.00 slot screen //0.. //0. 0. /0/0..0 //0.0. //0.0. //0. 0. //0.. //0.. //0.. //0. 0. //0.. // NG -- //.. //.0. //.. // NG -- // NG -- //.. //.. //. 0. //.0. //.00. //..0 //.. //.. /0/.. //..0 //.0. //.. //.. //. 0. //. 0.0 //.. //.. //.. //.. //.. //.. //..0 //.. //.. /0/. 0. //. 0. //.0 0. //.0. //.. //..0 //.. //.. //.. //.0. //.. //..0 //.0. //.. //.0. // 0..0 //.. page of

24 Table : Depth to Water and Groundwater Elevation of Monitoring Wells -Eleven Store No. Hampstead, Maryland Well Top of Casing Date Depth to Water (ft bgs) Corrected Elevation //.. //.. // NG -- // NG -- //.0. //.. //.. //.. //.0.0 // NA -- //.. // 0.. //.0. //..0 //.. //.. //.. /0/.. //.. //..0 /0/.. // NG NG // 0.. /0/.. //..0 //.. //.. //.. //.. //.0. //. 0. //.. //. 0.0 //. 0. // 0.. //.. //. 0. //.0. //.0. //. 0. /0/.. //..0 //..0 //.. //.. //..0 //.. /0/.0. /0/.0. //.. /0/. 0. //. 0. //.. page of

25 Table : Depth to Water and Groundwater Elevation of Monitoring Wells -Eleven Store No. Hampstead, Maryland Well Top of Casing Date Depth to Water (ft bgs) Corrected Elevation MW-.0 //0 NI -- //0 NI -- Installed //0 //0.. Total depth ' //0.0. Screened ' to ' //0..0 " casing;.00 slot screen //0.. //0. 0. /0/0.0. //0.. //0.0. // //0.. //0.. //0.. //0. 0. // //.. //..0 //. 0. //.. //.. //.. //.. //.. //. 0. //.. //. 0. //.. //.. //.. /0/.. //.. //.. //.0. //.0. //.. // NG -- //.. //.0. //.. //.. //. 0. //.. //.. //.. //.. /0/.. //. 0. //..0 //.. //.. //. 0. //.. //.. //.0.0 //.. //.. //.. //.0. // NA NA // //.. //.00.0 page of

26 Table : Depth to Water and Groundwater Elevation of Monitoring Wells -Eleven Store No. Hampstead, Maryland Well Top of Casing Date Depth to Water (ft bgs) Corrected Elevation //.0. // 0.0. //.0.0 //.. //.. //.. //.. //.0. //.. //.. //.. //.00.0 //.. //.. //..0 //.. //.. /0/.0.0 //.. //..0 /0/.. //.0. //.. /0/..0 //.. //..0 //.0.0 //.. //.. //.. //..0 // //.0 0. //. 0. //.. //.. //.. //.. // //. 0. /0/.. //.0. //.0.0 //.. //.. //.0. //. 0. /0/.0. /0/.. //.. /0/.. //.0. //.. page of

27 Table : Depth to Water and Groundwater Elevation of Monitoring Wells -Eleven Store No. Hampstead, Maryland Well Top of Casing Date Depth to Water (ft bgs) Corrected Elevation MW-. //0 NI -- //0 NI -- Installed //0 // Total depth ' //0.. Screened ' to ' //0.. " casing;.00 slot screen // //0. 0. /0/0.0. //0.. // //0. 0. // //0.. //0. 0. // //0..0 //.. //.. //.. // 0.. //.. //. 0. // //.. //. 0. //.. //.0. //. 0. //.. //..0 /0/.. //.. //.0.0 //.. //..0 //. 0. //. 0. //.. //.. //. 0.0 //.. //. 0. //.. //.. //.. //.. /0/.0.0 //. 0. //. 0. //.. // // NG NG // 0.. // 0.. // 0.. // NG NG //.. // 0..0 //.. // NA NA //. 0. //.. //.. page of

28 Table : Depth to Water and Groundwater Elevation of Monitoring Wells -Eleven Store No. Hampstead, Maryland Well Top of Casing Date Depth to Water (ft bgs) Corrected Elevation //..0 //.0. //.. //..0 //. 0. //.. //.. //.0. //.. //.. // //.. // 0.. //.. //.. // 0..0 // 0.. /0/.. // 0.. // 0.. /0/ NG NG //.. //. 0. /0/.0. //..0 //.0 0. // NG NG //.0 0. // 0.. // 0.. //.0. // 0.. //.. //. 0.0 //.. //.. //. 0.0 // //.. //.. /0/.. //.0. //..0 //..0 // NG NG //..0 //.. /0/ NG NG /0/.0. //.. /0/.. //.. //.. page of

29 Table : Depth to Water and Groundwater Elevation of Monitoring Wells -Eleven Store No. Hampstead, Maryland Well Top of Casing Date Depth to Water (ft bgs) Corrected Elevation MW-. //0.. //0.. Installed //0 //0.. Total depth 0' //0..0 Screened ' to 0' //0.0. " casing;.00 slot screen //.. //.0. //.0. //.. //..0 //..0 //.0. //.. //.0. //.. //.0. //. 0. //. 0. //. 0. /0/.. //.. //. 0. //. 0. //.. //.. //..0 //.. //..0 //.. //. 0. //.. //.. //. 0. //.. //.0 0. /0/.. //.. //.. //.. //.0. //..0 //.. //..0 //.. //..0 //.00. //.. //. 0. //. 0. //.. //.. //.. page of

30 Table : Depth to Water and Groundwater Elevation of Monitoring Wells -Eleven Store No. Hampstead, Maryland Well Top of Casing Date Depth to Water (ft bgs) Corrected Elevation // 0..0 //.. //..0 //.. //. 0.0 //.. //.0.0 //.0.0 //. 0. //.0. //.. //. 0. //.. //. 0.0 //.. //.. //.. /0/.. //.0.0 //.. /0/. 0. //. 0.0 //.0. /0/.. //.. //.. //.0. //. 0. //.. //.. //.0. //.. //.. //..0 //..0 //.0. //.. // //.. //..0 /0/.0. //.. //.. //.. //..0 //.. //.. /0/.00. /0/.. //.. /0/.. //.0. //.. page of

31 Table : Depth to Water and Groundwater Elevation of Monitoring Wells -Eleven Store No. Hampstead, Maryland Well Top of Casing Date Depth to Water (ft bgs) Corrected Elevation MW-. //0.. //0.. Installed //0 //0.. Total depth 00' //0.. ' steel casing to ' //0.0. //..0 //.0. //.. //..0 // 0.. //.. //.0. //. 0. //..0 //..0 //.. //.. //..0 //.0. /0/. 0. //..0 //. 0. //. 0.0 //.0. //.0. //.. //.0.0 //.0. //..0 //.. //.0. //.. //. 0.0 //. 0. //. 0.0 /0/.. //.. //.. //.. //.. // 0.. //.0. //.. //..0 //..0 //..0 //.. //.. // NA NA //.. //.. //.0. page of

32 Table : Depth to Water and Groundwater Elevation of Monitoring Wells -Eleven Store No. Hampstead, Maryland Well Top of Casing Date Depth to Water (ft bgs) Corrected Elevation //. 0. //. 0. //.. //.. //.0. // 0.. // // 0.. //.. //.. //.0. //.. //.. // 0..0 // 0.. //.. //.0. /0/.. //.. //.00. /0/ 0.. // 0.. //.. /0/.0. //.. //.. //.0. //..0 //.0. //.0. //.0. // 0.. //.. //.. //.. // 0.. //..0 //.. //.. //.. /0/.. //.. //.0. //.0. //..0 // 0.. //.0. /0/.. /0/.. //.. /0/.0.0 //..0 //.. page of

33 Table : Depth to Water and Groundwater Elevation of Monitoring Wells -Eleven Store No. Hampstead, Maryland Well Top of Casing Date Depth to Water (ft bgs) Corrected Elevation MW-. //0.. //0. 0. Installed //0 //0.. Total depth 00' //0. 0. ' steel casing to 0' //0.. //..0 //.. //. 0. //.0. //.. //..0 //..0 //.. //.. //.. //.. //. 0. //.0. //..0 /0/.0. //.. //.. //.. //.. //.. //.0 0. //. 0. //. 0. //. 0.0 //.0. //..0 //.. //.. //.. //.. /0/.. //.. //.. //. 0.0 //.0. //. ** // 0.0 ** //. ** //. ** //. ** //. ** // 0.0 ** //.0 ** //.0 ** //.0 ** // NG NG //. ** page of

34 Table : Depth to Water and Groundwater Elevation of Monitoring Wells -Eleven Store No. Hampstead, Maryland Well Top of Casing Date Depth to Water (ft bgs) Corrected Elevation //. ** //. ** // 0. ** //. ** //. ** //. ** //.0 ** //.0 ** //. ** //.0 ** //. ** //. ** //. ** //. ** //. ** //.0 ** //.0. /0/. ** //.0 ** //. ** /0/.0 ** // NG NG //.00 ** /0/.. //.. //.0 ** //.. //.. //. ** //. ** //. ** //.. //. ** //. ** //. ** //. ** //. 0. //.0.0 //.00. //. 0. /0/.. //. ** //. ** //. ** //. ** //. ** //. ** /0/.0 ** /0/. ** //.0 ** /0/. ** //. ** // 0.. page of

35 Table : Depth to Water and Groundwater Elevation of Monitoring Wells -Eleven Store No. Hampstead, Maryland Well Top of Casing Date Depth to Water (ft bgs) Corrected Elevation MW-. //.0 0. //. 0.0 Installed // //.. Total depth 00' //.. ' steel casing to ' //.00. //.. //.. //. 0.0 //.. //.. //..0 //.0. /0/.. //.. //..0 //.. //.. //.0. //.0. //. 0. //. 0. //.0 0. //..0 //.. //.. //.. //..0 //.. /0/.. //.0. //.. //. 0. //.0. //. ** //. ** //. ** //.0 ** //. ** //. ** // 0. ** //.0 ** //. ** //.0 ** //.0 ** page of

36 Table : Depth to Water and Groundwater Elevation of Monitoring Wells -Eleven Store No. Hampstead, Maryland Well Top of Casing Date Depth to Water (ft bgs) Corrected Elevation //. ** //.0 ** // 0.0 ** //. ** //. ** //. ** //. ** //. ** // 0. ** //. ** //. ** //. ** //. ** // 0. ** //. ** //. ** //..0 /0/.0 ** // 0. ** //. ** /0/. ** //. ** //.00 ** /0/.. //. 0. //. ** //.. //.0. //.0 ** //. ** //. ** //.. //. ** //. ** // 0. ** // 0.0 ** //. 0. //.0. //. 0. //. 0. /0/.0 0. // 0. ** //. ** //.0 ** //.0 ** //. ** //. ** /0/.0 ** /0/.0 ** //. ** /0/. ** // 0.0 ** // 0..0 page of

37 Table : Depth to Water and Groundwater Elevation of Monitoring Wells -Eleven Store No. Hampstead, Maryland Well Top of Casing Date Depth to Water (ft bgs) Corrected Elevation MW-.0 //.. //.. Installed // // 0.. Total depth 00' //.. ' steel casing to ' //.0. //.. //.. //.. //.0.0 //.. //. 0. //. 0. /0/.. //.. //. 0. //. 0. //.0 0. //.0. // NG -- //.. //.. //..0 //. 0. //.. // //. 0. //.. //. 0. /0/.0. //.. //.. //.. //.0. //. ** //.0 ** //. ** //.0 ** //. ** //. ** // 0. ** //. ** // 0. ** //.0 ** //. ** //. ** page of

38 Table : Depth to Water and Groundwater Elevation of Monitoring Wells -Eleven Store No. Hampstead, Maryland Well Top of Casing Date Depth to Water (ft bgs) Corrected Elevation //. ** //. ** //. ** //. ** //.0 ** //.0 ** //.0 ** //. ** //. ** //. ** //.0 ** // 0.0 ** //. ** //. ** //.0 ** //. ** //.. /0/.0 ** //. ** //.0 ** /0/.0 ** //.0 ** //.00 ** /0/.0 ** //. ** //.0 ** //. ** //. ** //. ** //. ** // NG ** //.. //. ** //. ** //. ** //.0 ** //.. //.. //.. //.. /0/.. //.0 ** //. ** //. ** // 0. ** //. ** //. ** /0/ 0. ** /0/. ** //. ** /0/ 0.0 ** //. ** // page 0 of

39 Table : Depth to Water and Groundwater Elevation of Monitoring Wells -Eleven Store No. Hampstead, Maryland Well Top of Casing Date Depth to Water (ft bgs) Corrected Elevation INJ- //0. -- // NG -- Installed //0 // NG -- Total depth ' // NG -- Screened ' to ' // NG -- " casing;.00 slot screen //. -- //. -- //.0 -- //. -- //. -- // NG -- // NG -- /0/ NG -- INJ- // //. -- Installed //0 // NG -- Total depth ' // NG -- Screened ' to ' // NG -- " casing;.00 slot screen //. -- //. -- //. -- //.0 -- //. -- // NG -- // NG -- /0/ NG -- INJ- //0. -- //.0 -- Installed //0 // NG -- Total depth ' // NG -- Screened ' to ' // NG -- " casing;.00 slot screen //. -- //. -- //. -- //. -- //. -- // NG -- // NG -- /0/ NG -- INJ- //0. -- //.0 -- Installed //0 // NG -- Total depth ' // NG -- Screened ' to ' // NG -- " casing;.00 slot screen //.0 -- //. -- //. -- //. -- //. -- // NG -- // NG -- /0/ NG -- page of

40 Table : Depth to Water and Groundwater Elevation of Monitoring Wells -Eleven Store No. Hampstead, Maryland Well Top of Casing Date Depth to Water (ft bgs) Corrected Elevation TF-. //0 Dry -- " PVC //0 Dry -- Total Depth ' //0 Dry -- //0 Dry -- //0 NG -- //0 Dry -- //0 Dry -- /0/0 Dry -- //0 Dry -- //0 Dry -- //0 Dry -- //0 Dry -- //0 Dry -- //0 Dry -- //0 Dry -- //0 Dry -- // Dry -- // Dry -- // Dry -- // Dry -- // NG -- // Dry -- // NG -- // Dry -- // Dry -- // NG -- // Dry -- // Dry -- // NG -- // NG -- /0/ Dry -- // NG -- // NG -- // Dry -- page of

41 Table : Depth to Water and Groundwater Elevation of Monitoring Wells -Eleven Store No. Hampstead, Maryland Well Top of Casing Date Depth to Water (ft bgs) Corrected Elevation TF-.0 //0 Dry -- " PVC //0 Dry -- Total Depth ' //0 Dry -- //0 Dry -- //0 NG -- //0 Dry -- //0 Dry /0/0 Dry -- //0 Dry -- //0 Dry -- //0 Dry //0 Dry -- //0 Dry -- //0 Dry -- //0 Dry -- //0 Dry -- // Dry -- // Dry -- // Dry -- // Dry -- // Dry -- // Dry -- // NG -- //. -- //. -- // NG -- // Dry -- // Dry -- // NG -- // NG -- /0/ Dry -- // NG -- // NG -- // Dry -- Groundwater Remediation System Started on October, 0 Submersible pumps deployed into monitoring wells MW-, MW- and MW- ft bgs - feet below ground surface NI - not installed NG - not gauged NA - Frozen access ** represents well is under pumping conditions page of

42 Table : Groundwater Analytical Results of Monitoring Well Sampling -Eleven Store No. Hampstead, Maryland Sample ID Date Benzene Toluene Ethylbenzene Xylenes BTEX MTBE TBA TAME TPH-GRO TPH-DRO (mg/l) NA E,000 NA E,000,000 E 00 NA NA E,00 E @ @ @ @0 @0 @0 @0 @0 @0 @0 @0 @0 @0 @ @0 @0 @0 @0 @ @ @ @ @ @ @ @ @ NA Page of

43 Table : Groundwater Analytical Results of Monitoring Well Sampling -Eleven Store No. Hampstead, Maryland Sample ID Date Benzene Toluene Ethylbenzene Xylenes BTEX MTBE TBA TAME TPH-GRO TPH-DRO (mg/l) NA @ NA @ NA @ NA @0 @0 @0 @0 @0 @0 @0 @0 @0 @0 @0 @0 @0 @0 @0 @0 @0 @0 @0 @0 @0 @ @ @ @ @ @ @ NA Page of

44 Table : Groundwater Analytical Results of Monitoring Well Sampling -Eleven Store No. Hampstead, Maryland Sample ID Date Benzene Toluene Ethylbenzene Xylenes BTEX MTBE TBA TAME TPH-GRO TPH-DRO (mg/l) 0 NA @ NA 0 NA NA NA // NS NS NS NS NS NS NS NS NS NA // NS NS NS NS NS NS NS NS NS NA Page of

45 Table : Groundwater Analytical Results of Monitoring Well Sampling -Eleven Store No. Hampstead, Maryland Sample ID Date Benzene Toluene Ethylbenzene Xylenes BTEX MTBE TBA TAME TPH-GRO TPH-DRO (mg/l) MW- //0 NI NI NI NI NI NI NI NI NA NA NA NA @0 @0 @0 @0 @ @0 @ NA Page of

46 Table : Groundwater Analytical Results of Monitoring Well Sampling -Eleven Store No. Hampstead, Maryland Sample ID Date Benzene Toluene Ethylbenzene Xylenes BTEX MTBE TBA TAME TPH-GRO TPH-DRO (mg/l) MW- //0 NI NI NI NI NI NI NI NI NA @ NA @ NA @ NA @0 @0 @0 @0 @0 @0 @0 @0 @0 @0 @0 @0 @ @0 @0 @0 @0 @0 @0 @ @ @ @ @ @ @ @ @ @ NA Page of

47 Table : Groundwater Analytical Results of Monitoring Well Sampling -Eleven Store No. Hampstead, Maryland Sample ID Date Benzene Toluene Ethylbenzene Xylenes BTEX MTBE TBA TAME TPH-GRO TPH-DRO (mg/l) @ 0 @, @,000 0,00 0,000 0,000 0,000 0,000 0, ,000 0, ,00 0, ,0 @0, , @ @. @ @ @ @ @ @ @ @ @ @ @ @ NA Page of

48 Table : Groundwater Analytical Results of Monitoring Well Sampling -Eleven Store No. Hampstead, Maryland Sample ID Date Benzene Toluene Ethylbenzene Xylenes BTEX MTBE TBA TAME TPH-GRO TPH-DRO (mg/l) @0 @0 @0 @0 @ NA Page of

49 Table : Groundwater Analytical Results of Monitoring Well Sampling -Eleven Store No. Hampstead, Maryland Sample ID Date Benzene Toluene Ethylbenzene Xylenes BTEX MTBE TBA TAME TPH-GRO TPH-DRO (mg/l) @0 @0 @ ,000 0, ,00 0, @0 @ @ @ @ NA @ @ @ @ @.. @ @ @ @ @ @ @ @ @ NA Page of

50 Table : Groundwater Analytical Results of Monitoring Well Sampling -Eleven Store No. Hampstead, Maryland Sample ID Date Benzene Toluene Ethylbenzene Xylenes BTEX MTBE TBA TAME TPH-GRO TPH-DRO (mg/l) @ NA @ @ @ @ @ @ @ @ @ NA NA @. NA NA NA NA NA @ @. NA NA NA NA NA NA @ NA NA NA @ NA NA NA Page of

51 Table : Groundwater Analytical Results of Monitoring Well Sampling -Eleven Store No. Hampstead, Maryland Sample ID Date Benzene Toluene Ethylbenzene Xylenes BTEX MTBE TBA TAME TPH-GRO TPH-DRO (mg/l) @0 @ , @. 0 @ @. 0. J NA @ @ @ @ 0.,0 @ @ @ @ @ @. @ @ @ @ @ NA Page of

52 Table : Groundwater Analytical Results of Monitoring Well Sampling -Eleven Store No. Hampstead, Maryland Sample ID Date Benzene Toluene Ethylbenzene Xylenes BTEX MTBE TBA TAME TPH-GRO TPH-DRO (mg/l) @ NA @ @ NA NA NA NA NA NA NA @ NA NA NA 0 NA NA 0. NA NA NA NA NA NA @ NA @ NA Page of

53 Table : Groundwater Analytical Results of Monitoring Well Sampling -Eleven Store No. Hampstead, Maryland Sample ID Date Benzene Toluene Ethylbenzene Xylenes BTEX MTBE TBA TAME TPH-GRO TPH-DRO (mg/l) @0 @0 @0 @ @ @ @ @ @0 @ @ @ NA Page of

54 Table : Groundwater Analytical Results of Monitoring Well Sampling -Eleven Store No. Hampstead, Maryland Sample ID Date Benzene Toluene Ethylbenzene Xylenes BTEX MTBE TBA TAME TPH-GRO TPH-DRO (mg/l) NA @ NA @ NA @ NA @ NA @ NA @ NA @ NA @ NA @ NA @ NA @ NA @ NA @ NA @ NA @ NA @ NA @ NA NA Page of

55 Table : Groundwater Analytical Results of Monitoring Well Sampling -Eleven Store No. Hampstead, Maryland Sample ID Date Benzene Toluene Ethylbenzene Xylenes BTEX MTBE TBA TAME TPH-GRO TPH-DRO (mg/l) 0,000 NA // NS NS NS NS NS NS NS NS NS NS @0 0,000 0,000 NA NA @ NA - Potable @0. NA @0. NA @0. NA @0. NA @0. NA @0. NA @0. NA @0. NA @0. NA 0. NA NA NA NA @0. NA NA @0. NA @0. NA @0. NA NA // NOT SAMPLED - MDE APPROVED CHANGE TO @0. NA @0. NA @0. NA NA @0. NA NA MDE CLEANUP STD,000 00, BTEX - Total Benzene, Toluene, Ethylbenzene and Xylenes MTBE - Methyl Tert-Butyl Ether TBA - Tert-Butyl Alcohol TAME - Tert-Amyl Methyl Ether µg/l - micrograms-per-liter Bold - indicates level above the MDE Cleanup - not detected above laboratory detection level of x - not detected NI - not installed NA - not analyzed NS - inaccessible E - estimated result; exceeds calibration range Page of

56 Sample ID Hanover Pike - Influent Date Benzene Toluene Table : Hanover Pike Sampling Results -Eleven Store No. Hampstead, Maryland Xylenes BTEX MTBE TBA TAME Ethylbenzene TPH- GRO Diisopropyl BDL,0 BDL,00 00 E BDL,00 BDL,00 BDL 0 BDL,00 @ BDL 00 BDL 0 BDL 0 0 BDL 0 0 BDL,00 0 BDL, @ BDL,00 0 NA // BDL 0 BDL 0 BDL BDL,00 BDL,00 0 BDL,00 0 BDL,00 0 BDL,00 0 BDL,00 0 BDL 0 0 BDL,00 @ BDL,00 0 BDL,00 BDL 0 BDL,00 0 BDL,00 0 BDL, BDL BDL,00 BDL,00 0 BDL, BDL,00 0 BDL,00 0 BDL,0 BDL,0 NA.

57 Sample ID Date Benzene Toluene Table : Hanover Pike Sampling Results -Eleven Store No. Hampstead, Maryland Xylenes BTEX MTBE TBA TAME Ethylbenzene TPH- GRO Diisopropyl BDL,00 BDL @. BDL, BDL,0 BDL 0 BDL //00 NA @. @ BDL BDL BDL. @0. BDL @0. BDL. @0. @ @ NA @0. @0. @0. @0. @0. @0. @0. @0. @0. @0. @0. @0. @0. @0. @0. @0. @0.

58 Sample ID Date Benzene Toluene Table : Hanover Pike Sampling Results -Eleven Store No. Hampstead, Maryland Xylenes BTEX MTBE TBA TAME Ethylbenzene TPH- GRO Diisopropyl Ether GAC @. @ @

59 Sample ID Date Benzene Toluene Table : Hanover Pike Sampling Results -Eleven Store No. Hampstead, Maryland Xylenes BTEX MTBE TBA TAME Ethylbenzene TPH- GRO Diisopropyl @0. @. @ @ @ @ @ @ @ @. @. @. @. @. @ @

60 Sample ID Date Benzene Toluene Table : Hanover Pike Sampling Results -Eleven Store No. Hampstead, Maryland Xylenes BTEX MTBE TBA TAME Ethylbenzene TPH- GRO Diisopropyl Ether GAC

61 Sample ID Date Benzene Toluene Table : Hanover Pike Sampling Results -Eleven Store No. Hampstead, Maryland Xylenes BTEX MTBE TBA TAME Ethylbenzene TPH- GRO Diisopropyl @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @

62 Sample ID Date Benzene Toluene Table : Hanover Pike Sampling Results -Eleven Store No. Hampstead, Maryland Xylenes BTEX MTBE TBA TAME Ethylbenzene TPH- GRO Diisopropyl Ether Final

63 Sample ID Date Benzene Toluene Table : Hanover Pike Sampling Results -Eleven Store No. Hampstead, Maryland Xylenes BTEX MTBE TBA TAME Ethylbenzene TPH- GRO Diisopropyl @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ MDE CLEANUP STD,000 00, BTEX - Total Benzene, Toluene, Ethylbenzene and Xylenes MTBE - Methyl Tert-Butyl Ether TBA - Tert-Butyl Alcohol TAME - Tert-Amyl Methyl Ether TPH-GRO - Total Petroleum Hydrocarbons - Gasoline Range Organics µg/l - - not detected above laboratory detection level of x - not detected NI - not installed NA - not analyzed NS - inaccessible E - estimated result; exceeds calibration range Bold - indicates level above the MDE Cleanup Standard

64 Table Residential Potable Well Sampling Results -Eleven Store No. Hampstead, Maryland Sample ID Hanover Pike Hanover Pike Hanover Pike 0 Hanover Pike Hanover Pike Phillips Drive Date Benzene Toluene Ethylbenzene Xylenes BTEX MTBE TBA TAME // NS NS NS NS NS NS NS NS @0. @0. @0 @0. NA // NS NS NS NS NS NS NS NS @0. @0. @0. @0. NA // NS NS NS NS NS NS NS NS // NS NS NS NS NS NS NS NS @0. NA MDE CLEANUP STD,000 00, Sample collected from Hanover Pike on // incorrectly labeled as Hanover Pike BTEX - Total Benzene, Toluene, Ethylbenzene and Xylenes MTBE - Methyl Tert-Butyl Ether TBA - Tert-Butyl Alcohol TAME - Tert-Amyl Methyl Ether TPH-GRO - Total Petroleum Hydrocarbons - Gasoline Range Organics µg/l - - not detected above laboratory detection level of x - not detected NS - inaccessible; could not contact property owner/residents Bold - indicates level above the MDE Cleanup Standard

65 Table : Pumping Wells Groundwater Analytical Results -Eleven Store No. Hampstead, Maryland Sample ID Date Benzene Toluene Ethylbenzene Xylenes BTEX MTBE TBA TAME TPH- GRO TPH- DRO (mg/l) @ NA @ @ @ @ @.. @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ NA NA @. NA NA NA NA NA @ @. NA NA NA NA NA NA @ NA NA NA NA @ @ @ @ NA NA NA

66 Table : Pumping Wells Groundwater Analytical Results -Eleven Store No. Hampstead, Maryland @. 0. J NA @ @ @ @ 0.,0 @ @ @ @ @ @. @ @ @ @ @ @ @ @ NA NA NA NA NA NA NA @ NA NA NA 0 NA NA 0. NA NA NA NA NA NA NA @ @ @ @ NA NA NA

67 Table : Pumping Wells Groundwater Analytical Results -Eleven Store No. Hampstead, Maryland @ @0 @ @ @ @ NA @ NA @ NA @ NA @ NA @ NA @ NA @ NA @ NA @ NA @ NA @ NA @ NA @ NA @ NA @ NA @ NA @ NA @ NA NA MDE CLEANUP STD,000 00, BTEX - Total Benzene, Toluene, Ethylbenzene and Xylenes MTBE - Methyl Tert-Butyl Ether TBA - Tert-Butyl Alcohol TAME - Tert-Amyl Methyl Ether µg/l - micrograms-per-liter Bold - indicates level above the MDE Cleanup - not detected above laboratory detection level of x - not detected NI - not installed NA - not analyzed NS - inaccessible E - estimated result; exceeds calibration range

68 Table Groundwater Remediation System Performance Data -Eleven Store No. Hampstead, MD Date Pump MW- (gallons) MW- Change from previous (gallons) Average GPD Average GPM Total Gallons Removed (since activation) Date Pump MW- (gallons) Change from previous (gallons) MW- Average GPD Average GPM Total Gallons Removed (since activation) Date Pump MW- (gallons) //0 ** ** ** //0 ** ** ** //0 ** ** ** //0 0. //0 0.0 //0,,0,0.0, //0,0,,.0,0 // //0,00,,.,00 //0,,,.0, // //0,0,0,.,0 //0,,0,., //0,, 0., //0,0,00,00.,0 //0,,,0., //0,0, 0.,0 //0,0,00,0.,0 //0,,,0., //0,0, 0.,0 //0,0,0,0.,0 //0,,,., //0,,0 0., //0 0,0,00,. 0,0 //0 0,,,. 0, //0,, 0., //0,,,., //0,,,.0, //0,,0 0., //0 0,0,,. 0,0 //0,,,., //0,, 0., //0,0,0,.,0 //0,, 0., //0,,0 0 0., //0,0,,.,0 //0,, 0., //0,, 0.0, //0,00,,.,00 //0,0,0 0.,0 //0, , //0 0,0,00,. 0,0 //0,0,,.,0 //0, , //0 0,,,. 0, //0,0,0,.,0 //0, , //0,00,,.,00 //0,00,,.0,00 //0, , //0 0,,,.0 0, //0 0,,,.0 0, //0, , //0 0,,0,. 0, //0,0,,0.0,0 //0, , //0,,,.0, //0,,, 0., //0, , //0,,,0.0, //0,0,, 0.,0 //0, , //0,00,,.,00 //0,,,0 0., //0, , //0,0,0,0.0,0 //0,,0, 0., //0, , //0,,,0., //0,0,,0 0.,0 //0, , //0, 0,,., //0,0,0, 0.,0 //0, , //0,,,., //0 0,0,, 0. 0,0 //0, , //0,0,,0.,0 //0,,,0 0., //0, , //0 0,,,. 0, //0 0,,, 0. 0, //0, , //0,,,., //0,,, 0.0, //0,0 0.,0 //0,,,., //0,,,.0, //0, 0., //0,,,., //0,0,0, 0.,0 //0,00,0 0.,00 //0,0,,0.,0 //0 0,,, 0. 0, //0,0, 0 0.,0 //0,,,., //0 0,,, 0. 0, //0, , //0,,,., //0 0,,, 0. 0, //0, 0.0, //0,,,0., //0,00,,0 0.,00 //0, 0 0., //0,,,., //0,0,, 0.,0 //0,,0 0., //0,000,000,0,.,000,000 //0,,,0 0., //0,, 0., //0,0,,,0.,0, //0,,, 0., //0 0,0, 0. 0,0 //0,,0,00,.0,,0 //0,0,, 0.,0 //0,, 0., //0,,,,.0,, //0,,,0 0., //0,, 0., //0,,,,0.0,, //0 0,0,0, 0. 0,0 //0,, 0., //0,0,,,.0,0, //0, 0,, 0., //0,, 0.0, //0,,,,.0,, //0,,0,0 0., //0,, 0.0, //0,, 0,0,.,, //0,,0, 0.0, //0,, 0., //0,,0,0,.0,,0 //0, 0,, 0., //0,, 0 0., //0,0,,,.,0, //0 0,0,, 0. 0,0 //0,00,0 0.0,00 //0,0,,,.,0, //0,,, 0., //0,, 0.0, //0,,0,,.,,0 //0,0,,0 0.,0 //0,0, 0.,0 //0,,,,0.,, //0,,,0 0., //0 0,0, ,0 //0,,,,0.0,, //0,,,0 0., //0 0,, , //0,,0 0,0,0.,,0 //0,,,0 0.0, //0,,0 0., //0,0,0,,0.,0,0 //0 0,,0, , //0 0,0, 0. 0,0 //0,,,00,.,, //0,0,0,00 0.0,0 //0,,0 0., //0,,,,.,, //0,, 0., //0,, 0., //0,,,,.,, //0,0, 0.,0 //0,0,0 0.,0 //0,0,0,,.,0,0 //0,0, 0.,0 //0 0,0,0 0. 0,0 //0,,00,0,.,,00 //0,00,0 0.,00 //0,0,0 0.,0 //0,,0,0,.,,0 //0,, 0., //0 0,00,0 0. 0,00 //0,,0,0,.,,0 //0 0,0,0 0. 0,0 //0,0,0 0.0,0 //0,,000,0,.,,000 //0,00,0 0.,00 //0,0,00 0.,0 //0,,0,0,.,,0 //0,0,00 0.,0 //0,, 0., //0,,,,.,, //0,, 0., //0,, 0., //0,,,0,.,, //0,,0 0., //0 0,00, 0. 0,00 //0,0,,0,.,0, //0,, 0., //0 0,, 0. 0, //0,, 0,,0.,, //0,0, 0.,0 //0 0,,0 0. 0, //0,,,,.0,, //0,0,0 0 0.,0 //0,00, 0.0,00 //0,,0,,.,,0 //0, ,0 //0,0, 0 0.0,0 //0,,0 0,0,.0,,0 //0, , //0, ,0 //0,, ,,0 //0,0, 0.,0 //0, 0.0, //0,,,,0.,, //0,00, 0.,00 //0, 0 0., //0,,,,.,, /0/0,00,0,.,00 /0/0,0,,0 0.,0 /0/0,,,,.0,, //0 0,,0 0. 0, //0,0,0 0.,0 //0,,0,,.0,,0 //0,,0 0 0., //0,, , //0,00, 0,0,.0,00, //0 0,,0 0. 0, //0,,0 0., //0,0,0,,0.,0,0 //0,,0 0 0., //0,, 0.0, //0,,,,.,, //0,0, 0.,0 //0,, 0 0., //0,,,,.,, //0,, 0.0, //0, 0., //0,,,,.,, /0/0,,0 0., /0/0,, 0.0, /0/0,, 0,0,.,, //0,, 0., //0,0, 0.,0 //0,0,0,,.,0,0 //0 0,0, ,0 //0,,0 0., //0,0,,,.,0, //0 0, 0.0 0, //0, 0 0.0, //0,,00,,.,,00 //0,0, 0.,0 //0,0,0 0.,0 //0,,00,,.0,,00 //0, ,00 //0, , //0,,,,.,, //0 0,, 0.0 0, //0,, 0 0., //0,,,,0.,, /0/0 0, ,0 /0/0, 0.00, /0/0,,0,,.,,0 //0,, 0 0., //0,,0 0 0., //0,,,,.,, //0, 0.00, //0, 0.00, //0,,,,.0,, //0,, 0., //0,, 0 0., //0,0, 0,,.,0, //0, 0.0, //0,0 0.00,0 //0,,0,,.,,0 Change from previous (gallons) MW- Average GPD Average GPM Total Gallons Removed (since activation)

69 Table Groundwater Remediation System Performance Data -Eleven Store No. Hampstead, MD //0,, 0., //0 00,, 0. 00, //0,,,,.,, //0, 0.00, //0 00, , //0,0,,0,.0,0, //0,0, 0.0,0 //0 0,0, 0. 0,0 //0,00,00,,.,00,00 //0, 0.00, //0 0, , //0,,,0,0.,, //0,0, 0.,0 //0 0,, 0.0 0, //0,,0 0,,0.,,0 //0, 0., //0 0, ,0 //0,,,,.,, //0,0, 0.,0 //0,, 0., //0,,0,0,.,,0 //0,0 0.0,0 //0, 0.00, //0,,0,0,.,,0 //0,0,00 0.,0 //0,, 0., //0,,,0,.,, //0, 0.00, //0, 0.00, //0,,,,.,, //0,, 0., //0,0,0 0.,0 //0,,,,.,, //0,0 0.00,0 //0, ,00 //0,,0,0,.,,0 //0,, 0., //0,, 0., //0,,, 0.,, //0,000,0, 0 0.,000,0 //0,0, 0 0.,0 //0,0,0,,.0,0,0 //0,0,0,0 0.,0,0 //0,,00 0., //0,,0,0,.0,,0 //0,0,, 0.,0, //0,, 0., //0,,0,0,.,,0 //0,0,00,0 0.0,0,00 //0,, 0.0, //0,,0,00,.,,0 //0,0,00, ,0,00 //0,, 0.0, //0,,00,,.0,,00 //0,0, 0.0,0, //0, 0.0, //0,,0,00 0.,,0 //0,0,0, 0.,0,0 //0,0, 0 0.,0 //0,,,0,.,, //0,0, 0.00,0, //0, ,0 //0,, 0.0,, //0,0,0, 0.,0,0 //0,0, 0.,0 //0,00,00 0,,.,00,00 //0,0,,0 0.,0, //0,0,0 0.0,0 //0,0,0 0,0,0 0.,0,0 //0,0, 0.0,0, //0, ,00 //0,,00,0 0.,,00 //0,0,00 0.0,0,00 //0, ,0 //0,, ,,0 //0,0, ,0,0 //0,0 0.00,0 //0,, ,,00 //0,0, 0.00,0, //0, 0.00, //0,,,0 0.00,, /0/0,0, 0.00,0, /0/0, 0.00, /0/0,,0, 0.00,,0 //0,0, 0.00,0, //0, , //0,, ,,0 //0,0,,0 0.0,0, //0,0, 0.,0 //0,,,,.,, //0,0,,0 0.,0, //0,, 0., //0,,0,,.0,,0 //0,00,0 0.0,00,0 //0,0 0.0,0 //0,, 0 0.0,, //0,0,, 0.,0, //0,, 0., //0,,0,0,.,,0 //0,0, 0 0.0,0, //0, ,0 //0,,,00 0.,, //0,0,, 0.,0, //0,0 0.0,0 //0,,0,0,.,,0 //0,,,0 0.,, //0,, 0., //0,,,0,.,, //0,,, 0.,, //0,,0 0., //0,,,,.,, //0,,,0 0.,, //0,0, 0 0.,0 //0,,,0,.,, //0,,,0 0.,, //0 00,, , //0,0,,,0.,0, //0,,,0 0 0.,, //0,, 0., //0,0,,,.,0, //0,,, 0.,, //0,0, 0.,0 //0,0,,00,.,0, /0/0,,, 0.,, /0/0,, 0., /0/0,,,,.,, //0,,, 0 0.,, //0,,00 0., //0,,,,.,, /0/0,,0, 0.,,0 /0/0,, 0.0, /0/0,,0,,0.,,0 //0,,,0 0.,, //0 0,0, 0. 0,0 //0,,00,,.0,,00 //0,,, 0.,, //0,, 0., //0,0,0,0,.,0,0 //0,,0, 0.,,0 //0,, 0., //0,,,0,.,, /0/0,0,, 0.,0, /0/0,, 0., /0/0,,,,.,, //0,,,0 0.0,, //0,,0 0., //0,,,0,0.,, //0,0,, 0.,0, //0 0,, , //0,0,0,0,.,0,0 ** = data not available due to system startup on October, 0 Flow restriction issues resulted in the inoperability of the pump in MW- from // through // GPD - gallons-per-day GPM- gallons-per-minute

70 Table Summary of Treatment System Analytical Results -Eleven Store No. Hampstead, MD Air Stripper Influent Air Stripper Effluent GAC Effluent GAC Effluent Date Benzene Toluene Ethylbenzene Xylenes Total BTEX MTBE Tert-Butanol TAME TPH-GRO Benzene Toluene Ethylbenzene Xylenes Total BTEX MTBE Tert-Butanol TAME TPH-GRO Benzene Toluene Ethylbenzene Xylenes Total BTEX MTBE Tert-Butanol TAME TPH-GRO Benzene Toluene Ethylbenzene Xylenes Total BTEX MTBE Tert-Butanol TAME TPH-GRO 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 NS NS NS NS NS NS NS NS @0 NS NS NS NS NS NS NS NS @ @ @ NA @ NA @ NA NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS @ 0.. 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 /0/ 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 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 NS NS NS NS NS /0/ 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 @ NA NA NA // 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 @ NA NA @ NA NA NA @ NA NA @ NA NA NA @ NA NA NA NA @ NA Page of

71 Table Summary of Treatment System Analytical Results -Eleven Store No. Hampstead, MD Air Stripper Influent Air Stripper Effluent GAC Effluent GAC Effluent Date Benzene Toluene Ethylbenzene Xylenes Total BTEX MTBE Tert-Butanol TAME TPH-GRO Benzene Toluene Ethylbenzene Xylenes Total BTEX MTBE Tert-Butanol TAME TPH-GRO Benzene Toluene Ethylbenzene Xylenes Total BTEX MTBE Tert-Butanol TAME TPH-GRO Benzene Toluene Ethylbenzene Xylenes Total BTEX MTBE Tert-Butanol TAME NA // 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 @ NA NA @ NA NA NA NA @ NA NA @ NA @ NA @ NA @ NA @ NA @ NA @ NA @ NA @ NA NA @ NA @ NA @.0 @. NA @ NA NA @ NA NA @ NA @ NA @ NA @ NA @ NA @ NA @ NA @ NA @ NA @ NA @ NA Notes: Samples collected on //0 are indicated as GAC Effluent samples on the COC; however, they are believed to be influent samples based on the similar concentrations observed in the recovery wells on //0. Samples collected on // and // were collected after the system re-start as part of pulsing efforts in MW- and MW-. ug/l = Micrograms-per-liter TPH-GRO - total petroleum hydrocarbons-gasoline range organics MTBE - methyl-tert-butyl ether NS - not sampled BTEX - Benzene, toluene, ethylbenzene, total xylenes TAME - Tert-amyl methyl - not detected above laboratory detection limit of "x" Page of

72 ATTACHMENT A Monitoring Well Laboratory Reports

73 ANALYTICAL REPORT TestAmerica Laboratories, Inc. 0 Foster Creighton Drive Nashville, TN 0 Tel: ()-0 TestAmerica Job ID: 0-- TestAmerica SDG: Hanover Pike, Hampstead, MD Client Project/Site:.Hampstead.EL (MD) Revision: For: AECOM 000 Virginia Manor Road Suite Beltsville, Maryland 00 Attn: Mr. John Canzeri Authorized for release by: //0 :: PM Jennifer Huckaba, Project Manager II ()0-0 jennifer.huckaba@testamericainc.com The test results in this report meet all 00 NELAC and 00 TNI requirements for accredited parameters, 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 Manager at the address or telephone number listed on this page. This report has been electronically signed and authorized by the signatory. Electronic signature is intended 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.

74 Client: AECOM Project/Site:.Hampstead.EL (MD) Table of Contents TestAmerica Job ID: 0-- SDG: Hanover Pike, Hampstead, MD Cover Page Table of Contents Sample Summary Case Narrative Definitions Client Sample Results QC Sample Results QC Association Chronicle Method Summary Certification Summary Chain of Custody Page of 0 //0 (Rev. )

75 Sample Summary Client: AECOM TestAmerica Job ID: 0-- Project/Site:.Hampstead.EL (MD) SDG: Hanover Pike, Hampstead, MD Lab Sample ID Client Sample ID Matrix Collected Received 0-- MW- Water 0// :00 0// :0 0-- MW- Water 0// :00 0// :0 0-- MW- Water 0// : 0// :0 0-- MW- Water 0// :0 0// :0 0-- MW- Water 0// : 0// :0 0-- MW- Water 0// :0 0// :0 0-- MW- Water 0// :00 0// :0 0-- MW- Water 0// : 0// :0 0-- MW- Water 0// :0 0// :0 0-- MW- Water 0// : 0// : Potable (P.O.U.) Water 0// :0 0// :0 Page of 0 //0 (Rev. )

76 Case Narrative Client: AECOM TestAmerica Job ID: 0-- Project/Site:.Hampstead.EL (MD) SDG: Hanover Pike, Hampstead, MD Job ID: 0-- Laboratory: Narrative Job Narrative 0-- Comments This is a revised report to remove samples that were supposed to be reported separately in a different report. This report now only contains the single page of samples on this COC. This report replaces the final that was generated on // at. Receipt The samples were received on //0 :0 AM; the samples arrived in good condition, properly preserved and, where required, on ice. The temperature of the cooler at receipt was.º C. GC/MS VOA Method(s).: The laboratory control sample (LCS) and laboratory control sample duplicate (LCSD) for analytical batch 0- recovered outside control limits for the following analytes: Methylene Chloride. These analytes were biased high in the LCS and were not detected in the associated samples; therefore, the data have been reported. Method(s) 0B: The laboratory control sample (LCS) for analytical batch 0- recovered outside control limits for the following analytes: Methyl acetate. This analyte was biased high in the LCS and was not detected in the associated samples; therefore, the data has been reported. Method(s) 0B: The laboratory control sample duplicate (LCSD) for analytical batch 0- recovered outside control limits for the following analytes: -Methyl--pentanone (MIBK) and Methyl acetate. These analytes were biased high in the LCSD and were not detected in the associated samples; therefore, the data have been reported. No additional analytical or quality issues were noted, other than those described above or in the Definitions/Glossary page. GC VOA No analytical or quality issues were noted, other than those described in the Definitions/Glossary page. VOA Prep No analytical or quality issues were noted, other than those described in the Definitions/Glossary page. Page of 0 //0 (Rev. )

77 Definitions/Glossary Client: AECOM TestAmerica Job ID: 0-- Project/Site:.Hampstead.EL (MD) SDG: Hanover Pike, Hampstead, MD Qualifiers GC/MS VOA Qualifier Qualifier Description MS, MSD: The analyte present in the original sample is greater than times the matrix spike concentration; therefore, control limits are not applicable. * LCS or LCSD is outside acceptance limits. Glossary Abbreviation 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 %R Percent Recovery CFL Contains Free Liquid CNF Contains No Free Liquid DER Duplicate Error Ratio (normalized absolute difference) 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 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) Page of 0 //0 (Rev. )

78 Client: AECOM Project/Site:.Hampstead.EL (MD) Client Sample ID: MW- Date Collected: 0// :00 Date Received: 0// :0 Method: 0B - Volatile Organic Compounds (GC/MS) Client Sample Results RL MDL TestAmerica Job ID: 0-- SDG: Hanover Pike, Hampstead, MD Lab Sample ID: 0-- Acetone.0 ug/l 0// 0: Benzene Bromochloromethane Bromodichloromethane Bromoform Bromomethane -Butanone (MEK) Carbon disulfide Carbon tetrachloride Chlorobenzene Chlorodibromomethane Chloroethane Chloroform Chloromethane cis-,-dichloroethene cis-,-dichloropropene Cyclohexane,-Dibromo--Chloropropane,-Dibromoethane (EDB),-Dichlorobenzene,-Dichlorobenzene,-Dichlorobenzene Dichlorodifluoromethane,-Dichloroethane,-Dichloroethane,-Dichloroethene,-Dichloropropane Diisopropyl ether Ethylbenzene Ethyl tert-butyl ether Freon -Hexanone Isopropylbenzene Methyl acetate * Methylcyclohexane Methylene Chloride -Methyl--pentanone (MIBK) * Methyl tert-butyl ether Naphthalene Styrene Tert-amyl methyl ether tert-butyl alcohol (TBA),,,-Tetrachloroethane Tetrachloroethene Toluene trans-,-dichloroethene trans-,-dichloropropene,,-trichlorobenzene,,-trichlorobenzene Unit D.00 ug/l 0// 0:.00 ug/l 0// 0:.00 ug/l 0// 0:.00 ug/l 0// 0:.00 ug/l 0// 0: 0.0 ug/l 0// 0:.00 ug/l 0// 0:.00 ug/l 0// 0:.00 ug/l 0// 0:.00 ug/l 0// 0:.00 ug/l 0// 0:.00 ug/l 0// 0:.00 ug/l 0// 0:.00 ug/l 0// 0:.00 ug/l 0// 0:.00 ug/l 0// 0:.0 ug/l 0// 0:.00 ug/l 0// 0:.00 ug/l 0// 0:.00 ug/l 0// 0:.00 ug/l 0// 0:.00 ug/l 0// 0:.00 ug/l 0// 0:.00 ug/l 0// 0:.00 ug/l 0// 0:.00 ug/l 0// 0:.00 ug/l 0// 0:.00 ug/l 0// 0:.00 ug/l 0// 0:.00 ug/l 0// 0:.0 ug/l 0// 0:.00 ug/l 0// 0:.0 ug/l 0// 0:.00 ug/l 0// 0:.00 ug/l 0// 0:.0 ug/l 0// 0:.00 ug/l 0// 0:.00 ug/l 0// 0:.00 ug/l 0// 0:.00 ug/l 0// 0:.0 ug/l 0// 0:.00 ug/l 0// 0:.00 ug/l 0// 0:.00 ug/l 0// 0:.00 ug/l 0// 0:.00 ug/l 0// 0:.00 ug/l 0// 0:.00 ug/l 0// 0: Page of 0 //0 (Rev. )

79 Client: AECOM Project/Site:.Hampstead.EL (MD) Client Sample ID: MW- Date Collected: 0// :00 Date Received: 0// :0 Client Sample Results Method: 0B - Volatile Organic Compounds (GC/MS) (Continued) RL MDL Unit TestAmerica Job ID: 0-- SDG: Hanover Pike, Hampstead, MD Lab Sample ID: 0--,,-Trichloroethane.00 ug/l 0// 0:,,-Trichloroethane Trichloroethene Trichlorofluoromethane Vinyl chloride m,p-xylene o-xylene Xylenes, Total Surrogate %Recovery Qualifier D.00 ug/l 0// 0:.00 ug/l 0// 0:.00 ug/l 0// 0:.00 ug/l 0// 0:.00 ug/l 0// 0:.00 ug/l 0// 0:.00 ug/l 0// 0: -Bromofluorobenzene (Surr) 0-0 0// 0: Dibromofluoromethane (Surr) 0-0 0// 0:,-Dichloroethane-d (Surr) 0-0 0// 0: Toluene-d (Surr) 0-0 0// 0: Method: 0C - Nonhalogenated Organics using GC/FID -Modified (Gasoline Range Organics) RL MDL Unit D Gasoline Range Organics [C - C] 0 ug/l 0// 00: Surrogate %Recovery Qualifier a,a,a-trifluorotoluene // 00: Page of 0 //0 (Rev. )

80 Client: AECOM Project/Site:.Hampstead.EL (MD) Client Sample ID: MW- Date Collected: 0// :00 Date Received: 0// :0 Method: 0B - Volatile Organic Compounds (GC/MS) Client Sample Results RL MDL TestAmerica Job ID: 0-- SDG: Hanover Pike, Hampstead, MD Lab Sample ID: 0-- Acetone.0 ug/l 0// 0: Benzene Bromochloromethane Bromodichloromethane Bromoform Bromomethane -Butanone (MEK) Carbon disulfide Carbon tetrachloride Chlorobenzene Chlorodibromomethane Chloroethane Chloroform Chloromethane cis-,-dichloroethene cis-,-dichloropropene Cyclohexane,-Dibromo--Chloropropane,-Dibromoethane (EDB),-Dichlorobenzene,-Dichlorobenzene,-Dichlorobenzene Dichlorodifluoromethane,-Dichloroethane,-Dichloroethane,-Dichloroethene,-Dichloropropane Diisopropyl ether Ethylbenzene Ethyl tert-butyl ether Freon -Hexanone Isopropylbenzene Methyl acetate * Methylcyclohexane Methylene Chloride -Methyl--pentanone (MIBK) * Methyl tert-butyl ether Naphthalene Styrene Tert-amyl methyl ether tert-butyl alcohol (TBA),,,-Tetrachloroethane Tetrachloroethene Toluene trans-,-dichloroethene trans-,-dichloropropene,,-trichlorobenzene,,-trichlorobenzene Unit D.00 ug/l 0// 0:.00 ug/l 0// 0:.00 ug/l 0// 0:.00 ug/l 0// 0:.00 ug/l 0// 0: 0.0 ug/l 0// 0:.00 ug/l 0// 0:.00 ug/l 0// 0:.00 ug/l 0// 0:.00 ug/l 0// 0:.00 ug/l 0// 0:.00 ug/l 0// 0:.00 ug/l 0// 0:.00 ug/l 0// 0:.00 ug/l 0// 0:.00 ug/l 0// 0:.0 ug/l 0// 0:.00 ug/l 0// 0:.00 ug/l 0// 0:.00 ug/l 0// 0:.00 ug/l 0// 0:.00 ug/l 0// 0:.00 ug/l 0// 0:.00 ug/l 0// 0:.00 ug/l 0// 0:.00 ug/l 0// 0:.00 ug/l 0// 0:.00 ug/l 0// 0:.00 ug/l 0// 0:.00 ug/l 0// 0:.0 ug/l 0// 0:.00 ug/l 0// 0:.0 ug/l 0// 0:.00 ug/l 0// 0:.00 ug/l 0// 0:.0 ug/l 0// 0:.00 ug/l 0// 0:.00 ug/l 0// 0:.00 ug/l 0// 0:.00 ug/l 0// 0:.0 ug/l 0// 0:.00 ug/l 0// 0:.00 ug/l 0// 0:.00 ug/l 0// 0:.00 ug/l 0// 0:.00 ug/l 0// 0:.00 ug/l 0// 0:.00 ug/l 0// 0: Page of 0 //0 (Rev. )

81 Client: AECOM Project/Site:.Hampstead.EL (MD) Client Sample ID: MW- Date Collected: 0// :00 Date Received: 0// :0 Client Sample Results Method: 0B - Volatile Organic Compounds (GC/MS) (Continued) RL MDL Unit TestAmerica Job ID: 0-- SDG: Hanover Pike, Hampstead, MD Lab Sample ID: 0--,,-Trichloroethane.00 ug/l 0// 0:,,-Trichloroethane Trichloroethene Trichlorofluoromethane Vinyl chloride m,p-xylene o-xylene Xylenes, Total Surrogate %Recovery Qualifier D.00 ug/l 0// 0:.00 ug/l 0// 0:.00 ug/l 0// 0:.00 ug/l 0// 0:.00 ug/l 0// 0:.00 ug/l 0// 0:.00 ug/l 0// 0: -Bromofluorobenzene (Surr) 0-0 0// 0: Dibromofluoromethane (Surr) 0-0 0// 0:,-Dichloroethane-d (Surr) 0-0 0// 0: Toluene-d (Surr) 0-0 0// 0: Method: 0C - Nonhalogenated Organics using GC/FID -Modified (Gasoline Range Organics) RL MDL Unit D Gasoline Range Organics [C - C] 0 ug/l 0// 00: Surrogate %Recovery Qualifier a,a,a-trifluorotoluene 0-0 0// 00: Page of 0 //0 (Rev. )

82 Client: AECOM Project/Site:.Hampstead.EL (MD) Client Sample ID: MW- Date Collected: 0// : Date Received: 0// :0 Method: 0B - Volatile Organic Compounds (GC/MS) Client Sample Results RL MDL TestAmerica Job ID: 0-- SDG: Hanover Pike, Hampstead, MD Lab Sample ID: 0-- Acetone.0 ug/l 0// 0:0 Benzene Bromochloromethane Bromodichloromethane Bromoform Bromomethane -Butanone (MEK) Carbon disulfide Carbon tetrachloride Chlorobenzene Chlorodibromomethane Chloroethane Chloroform Chloromethane cis-,-dichloroethene cis-,-dichloropropene Cyclohexane,-Dibromo--Chloropropane,-Dibromoethane (EDB),-Dichlorobenzene,-Dichlorobenzene,-Dichlorobenzene Dichlorodifluoromethane,-Dichloroethane,-Dichloroethane,-Dichloroethene,-Dichloropropane Diisopropyl ether Ethylbenzene Ethyl tert-butyl ether Freon -Hexanone Isopropylbenzene Methyl acetate * Methylcyclohexane Methylene Chloride -Methyl--pentanone (MIBK) * Methyl tert-butyl ether Naphthalene Styrene Tert-amyl methyl ether tert-butyl alcohol (TBA),,,-Tetrachloroethane Tetrachloroethene Toluene trans-,-dichloroethene trans-,-dichloropropene,,-trichlorobenzene,,-trichlorobenzene Unit D.00 ug/l 0// 0:0.00 ug/l 0// 0:0.00 ug/l 0// 0:0.00 ug/l 0// 0:0.00 ug/l 0// 0:0 0.0 ug/l 0// 0:0.00 ug/l 0// 0:0.00 ug/l 0// 0:0.00 ug/l 0// 0:0.00 ug/l 0// 0:0.00 ug/l 0// 0:0.00 ug/l 0// 0:0.00 ug/l 0// 0:0.00 ug/l 0// 0:0.00 ug/l 0// 0:0.00 ug/l 0// 0:0.0 ug/l 0// 0:0.00 ug/l 0// 0:0.00 ug/l 0// 0:0.00 ug/l 0// 0:0.00 ug/l 0// 0:0.00 ug/l 0// 0:0.00 ug/l 0// 0:0.00 ug/l 0// 0:0.00 ug/l 0// 0:0.00 ug/l 0// 0:0.00 ug/l 0// 0:0.00 ug/l 0// 0:0.00 ug/l 0// 0:0.00 ug/l 0// 0:0.0 ug/l 0// 0:0.00 ug/l 0// 0:0.0 ug/l 0// 0:0.00 ug/l 0// 0:0.00 ug/l 0// 0:0.0 ug/l 0// 0:0.00 ug/l 0// 0:0.00 ug/l 0// 0:0.00 ug/l 0// 0:0.00 ug/l 0// 0:0.0 ug/l 0// 0:0.00 ug/l 0// 0:0.00 ug/l 0// 0:0.00 ug/l 0// 0:0.00 ug/l 0// 0:0.00 ug/l 0// 0:0.00 ug/l 0// 0:0.00 ug/l 0// 0:0 Page of 0 //0 (Rev. )

83 Client: AECOM Project/Site:.Hampstead.EL (MD) Client Sample ID: MW- Date Collected: 0// : Date Received: 0// :0 Client Sample Results Method: 0B - Volatile Organic Compounds (GC/MS) (Continued) RL MDL Unit TestAmerica Job ID: 0-- SDG: Hanover Pike, Hampstead, MD Lab Sample ID: 0--,,-Trichloroethane.00 ug/l 0// 0:0,,-Trichloroethane Trichloroethene Trichlorofluoromethane Vinyl chloride m,p-xylene o-xylene Xylenes, Total Surrogate %Recovery Qualifier D.00 ug/l 0// 0:0.00 ug/l 0// 0:0.00 ug/l 0// 0:0.00 ug/l 0// 0:0.00 ug/l 0// 0:0.00 ug/l 0// 0:0.00 ug/l 0// 0:0 -Bromofluorobenzene (Surr) 0-0 0// 0:0 Dibromofluoromethane (Surr) 0-0 0// 0:0,-Dichloroethane-d (Surr) 0-0 0// 0:0 Toluene-d (Surr) 0-0 0// 0:0 Method: 0C - Nonhalogenated Organics using GC/FID -Modified (Gasoline Range Organics) RL MDL Unit D Gasoline Range Organics [C - C] 0 ug/l 0// 0: Surrogate %Recovery Qualifier a,a,a-trifluorotoluene // 0: Page of 0 //0 (Rev. )

84 Client: AECOM Project/Site:.Hampstead.EL (MD) Client Sample ID: MW- Date Collected: 0// :0 Date Received: 0// :0 Method: 0B - Volatile Organic Compounds (GC/MS) Client Sample Results RL MDL TestAmerica Job ID: 0-- SDG: Hanover Pike, Hampstead, MD Lab Sample ID: 0-- Acetone.0 ug/l 0// 0: Benzene Bromochloromethane Bromodichloromethane Bromoform Bromomethane -Butanone (MEK) Carbon disulfide Carbon tetrachloride Chlorobenzene Chlorodibromomethane Chloroethane Chloroform Chloromethane cis-,-dichloroethene cis-,-dichloropropene Cyclohexane,-Dibromo--Chloropropane,-Dibromoethane (EDB),-Dichlorobenzene,-Dichlorobenzene,-Dichlorobenzene Dichlorodifluoromethane,-Dichloroethane,-Dichloroethane,-Dichloroethene,-Dichloropropane Diisopropyl ether Ethylbenzene Ethyl tert-butyl ether Freon -Hexanone Isopropylbenzene Methyl acetate * Methylcyclohexane Methylene Chloride -Methyl--pentanone (MIBK) * Methyl tert-butyl ether Naphthalene Styrene Tert-amyl methyl ether tert-butyl alcohol (TBA),,,-Tetrachloroethane Tetrachloroethene Toluene trans-,-dichloroethene trans-,-dichloropropene,,-trichlorobenzene,,-trichlorobenzene Unit D.00 ug/l 0// 0:.00 ug/l 0// 0:.00 ug/l 0// 0:.00 ug/l 0// 0:.00 ug/l 0// 0: 0.0 ug/l 0// 0:.00 ug/l 0// 0:.00 ug/l 0// 0:.00 ug/l 0// 0:.00 ug/l 0// 0:.00 ug/l 0// 0:.00 ug/l 0// 0:.00 ug/l 0// 0:.00 ug/l 0// 0:.00 ug/l 0// 0:.00 ug/l 0// 0:.0 ug/l 0// 0:.00 ug/l 0// 0:.00 ug/l 0// 0:.00 ug/l 0// 0:.00 ug/l 0// 0:.00 ug/l 0// 0:.00 ug/l 0// 0:.00 ug/l 0// 0:.00 ug/l 0// 0:.00 ug/l 0// 0:.00 ug/l 0// 0:.00 ug/l 0// 0:.00 ug/l 0// 0:.00 ug/l 0// 0:.0 ug/l 0// 0:.00 ug/l 0// 0:.0 ug/l 0// 0:.00 ug/l 0// 0:.00 ug/l 0// 0:.0 ug/l 0// 0:.00 ug/l 0// 0:.00 ug/l 0// 0:.00 ug/l 0// 0:.00 ug/l 0// 0:.0 ug/l 0// 0:.00 ug/l 0// 0:.00 ug/l 0// 0:.00 ug/l 0// 0:.00 ug/l 0// 0:.00 ug/l 0// 0:.00 ug/l 0// 0:.00 ug/l 0// 0: Page of 0 //0 (Rev. )

85 Client: AECOM Project/Site:.Hampstead.EL (MD) Client Sample ID: MW- Date Collected: 0// :0 Date Received: 0// :0 Client Sample Results Method: 0B - Volatile Organic Compounds (GC/MS) (Continued) RL MDL Unit TestAmerica Job ID: 0-- SDG: Hanover Pike, Hampstead, MD Lab Sample ID: 0--,,-Trichloroethane.00 ug/l 0// 0:,,-Trichloroethane Trichloroethene Trichlorofluoromethane Vinyl chloride m,p-xylene o-xylene Xylenes, Total Surrogate %Recovery Qualifier D.00 ug/l 0// 0:.00 ug/l 0// 0:.00 ug/l 0// 0:.00 ug/l 0// 0:.00 ug/l 0// 0:.00 ug/l 0// 0:.00 ug/l 0// 0: -Bromofluorobenzene (Surr) 0-0 0// 0: Dibromofluoromethane (Surr) 0-0 0// 0:,-Dichloroethane-d (Surr) 0-0 0// 0: Toluene-d (Surr) 0-0 0// 0: Method: 0C - Nonhalogenated Organics using GC/FID -Modified (Gasoline Range Organics) RL MDL Unit D Gasoline Range Organics [C - C] 0 ug/l 0// 0:0 Surrogate %Recovery Qualifier a,a,a-trifluorotoluene 0-0 0// 0:0 Page of 0 //0 (Rev. )

86 Client: AECOM Project/Site:.Hampstead.EL (MD) Client Sample ID: MW- Date Collected: 0// : Date Received: 0// :0 Method: 0B - Volatile Organic Compounds (GC/MS) Client Sample Results RL MDL TestAmerica Job ID: 0-- SDG: Hanover Pike, Hampstead, MD Lab Sample ID: 0-- Acetone.0 ug/l 0// 0: Benzene Bromochloromethane Bromodichloromethane Bromoform Bromomethane -Butanone (MEK) Carbon disulfide Carbon tetrachloride Chlorobenzene Chlorodibromomethane Chloroethane Chloroform Chloromethane cis-,-dichloroethene cis-,-dichloropropene Cyclohexane,-Dibromo--Chloropropane,-Dibromoethane (EDB),-Dichlorobenzene,-Dichlorobenzene,-Dichlorobenzene Dichlorodifluoromethane,-Dichloroethane,-Dichloroethane,-Dichloroethene,-Dichloropropane Diisopropyl ether Ethylbenzene Ethyl tert-butyl ether Freon -Hexanone Isopropylbenzene Methyl acetate * Methylcyclohexane Methylene Chloride -Methyl--pentanone (MIBK) * Methyl tert-butyl ether Naphthalene Styrene Tert-amyl methyl ether tert-butyl alcohol (TBA),,,-Tetrachloroethane Tetrachloroethene Toluene trans-,-dichloroethene trans-,-dichloropropene,,-trichlorobenzene,,-trichlorobenzene Unit D.00 ug/l 0// 0:.00 ug/l 0// 0:.00 ug/l 0// 0:.00 ug/l 0// 0:.00 ug/l 0// 0: 0.0 ug/l 0// 0:.00 ug/l 0// 0:.00 ug/l 0// 0:.00 ug/l 0// 0:.00 ug/l 0// 0:.00 ug/l 0// 0:.00 ug/l 0// 0:.00 ug/l 0// 0:.00 ug/l 0// 0:.00 ug/l 0// 0:.00 ug/l 0// 0:.0 ug/l 0// 0:.00 ug/l 0// 0:.00 ug/l 0// 0:.00 ug/l 0// 0:.00 ug/l 0// 0:.00 ug/l 0// 0:.00 ug/l 0// 0:.00 ug/l 0// 0:.00 ug/l 0// 0:.00 ug/l 0// 0:.00 ug/l 0// 0:.00 ug/l 0// 0:.00 ug/l 0// 0:.00 ug/l 0// 0:.0 ug/l 0// 0:.00 ug/l 0// 0:.0 ug/l 0// 0:.00 ug/l 0// 0:.00 ug/l 0// 0:.0 ug/l 0// 0:.00 ug/l 0// 0:.00 ug/l 0// 0:.00 ug/l 0// 0:.00 ug/l 0// 0:.0 ug/l 0// 0:.00 ug/l 0// 0:.00 ug/l 0// 0:.00 ug/l 0// 0:.00 ug/l 0// 0:.00 ug/l 0// 0:.00 ug/l 0// 0:.00 ug/l 0// 0: Page of 0 //0 (Rev. )

87 Client: AECOM Project/Site:.Hampstead.EL (MD) Client Sample ID: MW- Date Collected: 0// : Date Received: 0// :0 Client Sample Results Method: 0B - Volatile Organic Compounds (GC/MS) (Continued) RL MDL Unit TestAmerica Job ID: 0-- SDG: Hanover Pike, Hampstead, MD Lab Sample ID: 0--,,-Trichloroethane.00 ug/l 0// 0:,,-Trichloroethane Trichloroethene Trichlorofluoromethane Vinyl chloride m,p-xylene o-xylene Xylenes, Total Surrogate %Recovery Qualifier D.00 ug/l 0// 0:.00 ug/l 0// 0:.00 ug/l 0// 0:.00 ug/l 0// 0:.00 ug/l 0// 0:.00 ug/l 0// 0:.00 ug/l 0// 0: -Bromofluorobenzene (Surr) 0-0 0// 0: Dibromofluoromethane (Surr) // 0:,-Dichloroethane-d (Surr) 0-0 0// 0: Toluene-d (Surr) 0-0 0// 0: Method: 0C - Nonhalogenated Organics using GC/FID -Modified (Gasoline Range Organics) RL MDL Unit D Gasoline Range Organics [C - C] 0 ug/l 0// 0: Surrogate %Recovery Qualifier a,a,a-trifluorotoluene 0-0 0// 0: Page of 0 //0 (Rev. )

88 Client: AECOM Project/Site:.Hampstead.EL (MD) Client Sample ID: MW- Date Collected: 0// :0 Date Received: 0// :0 Method: 0B - Volatile Organic Compounds (GC/MS) Client Sample Results RL MDL TestAmerica Job ID: 0-- SDG: Hanover Pike, Hampstead, MD Lab Sample ID: 0-- Acetone.0 ug/l 0// 0: Benzene Bromochloromethane Bromodichloromethane Bromoform Bromomethane -Butanone (MEK) Carbon disulfide Carbon tetrachloride Chlorobenzene Chlorodibromomethane Chloroethane Chloroform Chloromethane cis-,-dichloroethene cis-,-dichloropropene Cyclohexane,-Dibromo--Chloropropane,-Dibromoethane (EDB),-Dichlorobenzene,-Dichlorobenzene,-Dichlorobenzene Dichlorodifluoromethane,-Dichloroethane,-Dichloroethane,-Dichloroethene,-Dichloropropane Diisopropyl ether Ethylbenzene Ethyl tert-butyl ether Freon -Hexanone Isopropylbenzene Methyl acetate * Methylcyclohexane Methylene Chloride -Methyl--pentanone (MIBK) * Methyl tert-butyl ether Naphthalene Styrene Tert-amyl methyl ether tert-butyl alcohol (TBA),,,-Tetrachloroethane Tetrachloroethene Toluene trans-,-dichloroethene trans-,-dichloropropene,,-trichlorobenzene,,-trichlorobenzene Unit D.00 ug/l 0// 0:.00 ug/l 0// 0:.00 ug/l 0// 0:.00 ug/l 0// 0:.00 ug/l 0// 0: 0.0 ug/l 0// 0:.00 ug/l 0// 0:.00 ug/l 0// 0:.00 ug/l 0// 0:.00 ug/l 0// 0:.00 ug/l 0// 0:.00 ug/l 0// 0:.00 ug/l 0// 0:.00 ug/l 0// 0:.00 ug/l 0// 0:.00 ug/l 0// 0:.0 ug/l 0// 0:.00 ug/l 0// 0:.00 ug/l 0// 0:.00 ug/l 0// 0:.00 ug/l 0// 0:.00 ug/l 0// 0:.00 ug/l 0// 0:.00 ug/l 0// 0:.00 ug/l 0// 0:.00 ug/l 0// 0:.00 ug/l 0// 0:.00 ug/l 0// 0:.00 ug/l 0// 0:.00 ug/l 0// 0:.0 ug/l 0// 0:.00 ug/l 0// 0:.0 ug/l 0// 0:.00 ug/l 0// 0:.00 ug/l 0// 0:.0 ug/l 0// 0:.00 ug/l 0// 0:.00 ug/l 0// 0:.00 ug/l 0// 0:.00 ug/l 0// 0:.0 ug/l 0// 0:.00 ug/l 0// 0:.00 ug/l 0// 0:.00 ug/l 0// 0:.00 ug/l 0// 0:.00 ug/l 0// 0:.00 ug/l 0// 0:.00 ug/l 0// 0: Page of 0 //0 (Rev. )

89 Client: AECOM Project/Site:.Hampstead.EL (MD) Client Sample ID: MW- Date Collected: 0// :0 Date Received: 0// :0 Client Sample Results Method: 0B - Volatile Organic Compounds (GC/MS) (Continued) RL MDL Unit TestAmerica Job ID: 0-- SDG: Hanover Pike, Hampstead, MD Lab Sample ID: 0--,,-Trichloroethane.00 ug/l 0// 0:,,-Trichloroethane Trichloroethene Trichlorofluoromethane Vinyl chloride m,p-xylene o-xylene Xylenes, Total Surrogate %Recovery Qualifier D.00 ug/l 0// 0:.00 ug/l 0// 0:.00 ug/l 0// 0:.00 ug/l 0// 0:.00 ug/l 0// 0:.00 ug/l 0// 0:.00 ug/l 0// 0: -Bromofluorobenzene (Surr) 0-0 0// 0: Dibromofluoromethane (Surr) 0-0 0// 0:,-Dichloroethane-d (Surr) 0-0 0// 0: Toluene-d (Surr) 0-0 0// 0: Method: 0C - Nonhalogenated Organics using GC/FID -Modified (Gasoline Range Organics) RL MDL Unit D Gasoline Range Organics [C - C] 0 ug/l 0// 0: Surrogate %Recovery Qualifier a,a,a-trifluorotoluene 0-0 0// 0: Page of 0 //0 (Rev. )

90 Client: AECOM Project/Site:.Hampstead.EL (MD) Client Sample ID: MW- Date Collected: 0// :00 Date Received: 0// :0 Method: 0B - Volatile Organic Compounds (GC/MS) Client Sample Results RL MDL TestAmerica Job ID: 0-- SDG: Hanover Pike, Hampstead, MD Lab Sample ID: 0-- Acetone.0 ug/l 0// 0:0 Benzene Bromochloromethane Bromodichloromethane Bromoform Bromomethane -Butanone (MEK) Carbon disulfide Carbon tetrachloride Chlorobenzene Chlorodibromomethane Chloroethane Chloroform Chloromethane cis-,-dichloroethene cis-,-dichloropropene Cyclohexane,-Dibromo--Chloropropane,-Dibromoethane (EDB),-Dichlorobenzene,-Dichlorobenzene,-Dichlorobenzene Dichlorodifluoromethane,-Dichloroethane,-Dichloroethane,-Dichloroethene,-Dichloropropane Diisopropyl ether Ethylbenzene Ethyl tert-butyl ether Freon -Hexanone Isopropylbenzene Methyl acetate * Methylcyclohexane Methylene Chloride -Methyl--pentanone (MIBK) * Methyl tert-butyl ether Naphthalene Styrene Tert-amyl methyl ether tert-butyl alcohol (TBA),,,-Tetrachloroethane Tetrachloroethene Toluene trans-,-dichloroethene trans-,-dichloropropene,,-trichlorobenzene,,-trichlorobenzene Unit D.00 ug/l 0// 0:0.00 ug/l 0// 0:0.00 ug/l 0// 0:0.00 ug/l 0// 0:0.00 ug/l 0// 0:0 0.0 ug/l 0// 0:0.00 ug/l 0// 0:0.00 ug/l 0// 0:0.00 ug/l 0// 0:0.00 ug/l 0// 0:0.00 ug/l 0// 0:0.00 ug/l 0// 0:0.00 ug/l 0// 0:0.00 ug/l 0// 0:0.00 ug/l 0// 0:0.00 ug/l 0// 0:0.0 ug/l 0// 0:0.00 ug/l 0// 0:0.00 ug/l 0// 0:0.00 ug/l 0// 0:0.00 ug/l 0// 0:0.00 ug/l 0// 0:0.00 ug/l 0// 0:0.00 ug/l 0// 0:0.00 ug/l 0// 0:0.00 ug/l 0// 0:0.00 ug/l 0// 0:0.00 ug/l 0// 0:0.00 ug/l 0// 0:0.00 ug/l 0// 0:0.0 ug/l 0// 0:0.00 ug/l 0// 0:0.0 ug/l 0// 0:0.00 ug/l 0// 0:0.00 ug/l 0// 0:0.0 ug/l 0// 0:0.00 ug/l 0// 0:0.00 ug/l 0// 0:0.00 ug/l 0// 0:0.00 ug/l 0// 0:0.0 ug/l 0// 0:0.00 ug/l 0// 0:0.00 ug/l 0// 0:0.00 ug/l 0// 0:0.00 ug/l 0// 0:0.00 ug/l 0// 0:0.00 ug/l 0// 0:0.00 ug/l 0// 0:0 Page of 0 //0 (Rev. )

91 Client: AECOM Project/Site:.Hampstead.EL (MD) Client Sample ID: MW- Date Collected: 0// :00 Date Received: 0// :0 Client Sample Results Method: 0B - Volatile Organic Compounds (GC/MS) (Continued) RL MDL Unit TestAmerica Job ID: 0-- SDG: Hanover Pike, Hampstead, MD Lab Sample ID: 0--,,-Trichloroethane.00 ug/l 0// 0:0,,-Trichloroethane Trichloroethene Trichlorofluoromethane Vinyl chloride m,p-xylene o-xylene Xylenes, Total Surrogate %Recovery Qualifier D.00 ug/l 0// 0:0.00 ug/l 0// 0:0.00 ug/l 0// 0:0.00 ug/l 0// 0:0.00 ug/l 0// 0:0.00 ug/l 0// 0:0.00 ug/l 0// 0:0 -Bromofluorobenzene (Surr) 0-0 0// 0:0 Dibromofluoromethane (Surr) 0-0 0// 0:0,-Dichloroethane-d (Surr) 0-0 0// 0:0 Toluene-d (Surr) 0-0 0// 0:0 Method: 0C - Nonhalogenated Organics using GC/FID -Modified (Gasoline Range Organics) RL MDL Unit D Gasoline Range Organics [C - C] 0 ug/l 0// 0:0 Surrogate %Recovery Qualifier a,a,a-trifluorotoluene 0-0 0// 0:0 Page of 0 //0 (Rev. )

92 Client: AECOM Project/Site:.Hampstead.EL (MD) Client Sample ID: MW- Date Collected: 0// : Date Received: 0// :0 Method: 0B - Volatile Organic Compounds (GC/MS) Client Sample Results RL MDL TestAmerica Job ID: 0-- SDG: Hanover Pike, Hampstead, MD Lab Sample ID: 0-- Acetone.0 ug/l 0// 0: Benzene Bromochloromethane Bromodichloromethane Bromoform Bromomethane -Butanone (MEK) Carbon disulfide Carbon tetrachloride Chlorobenzene Chlorodibromomethane Chloroethane Chloroform Chloromethane cis-,-dichloroethene cis-,-dichloropropene Cyclohexane,-Dibromo--Chloropropane,-Dibromoethane (EDB),-Dichlorobenzene,-Dichlorobenzene,-Dichlorobenzene Dichlorodifluoromethane,-Dichloroethane,-Dichloroethane,-Dichloroethene,-Dichloropropane Diisopropyl ether Ethylbenzene Ethyl tert-butyl ether Freon -Hexanone Isopropylbenzene Methyl acetate * Methylcyclohexane Methylene Chloride -Methyl--pentanone (MIBK) * Methyl tert-butyl ether. Naphthalene Styrene Tert-amyl methyl ether tert-butyl alcohol (TBA),,,-Tetrachloroethane Tetrachloroethene Toluene trans-,-dichloroethene trans-,-dichloropropene,,-trichlorobenzene,,-trichlorobenzene Unit D.00 ug/l 0// 0:.00 ug/l 0// 0:.00 ug/l 0// 0:.00 ug/l 0// 0:.00 ug/l 0// 0: 0.0 ug/l 0// 0:.00 ug/l 0// 0:.00 ug/l 0// 0:.00 ug/l 0// 0:.00 ug/l 0// 0:.00 ug/l 0// 0:.00 ug/l 0// 0:.00 ug/l 0// 0:.00 ug/l 0// 0:.00 ug/l 0// 0:.00 ug/l 0// 0:.0 ug/l 0// 0:.00 ug/l 0// 0:.00 ug/l 0// 0:.00 ug/l 0// 0:.00 ug/l 0// 0:.00 ug/l 0// 0:.00 ug/l 0// 0:.00 ug/l 0// 0:.00 ug/l 0// 0:.00 ug/l 0// 0:.00 ug/l 0// 0:.00 ug/l 0// 0:.00 ug/l 0// 0:.00 ug/l 0// 0:.0 ug/l 0// 0:.00 ug/l 0// 0:.0 ug/l 0// 0:.00 ug/l 0// 0:.00 ug/l 0// 0:.0 ug/l 0// 0:.00 ug/l 0// 0:.00 ug/l 0// 0:.00 ug/l 0// 0:.00 ug/l 0// 0:.0 ug/l 0// 0:.00 ug/l 0// 0:.00 ug/l 0// 0:.00 ug/l 0// 0:.00 ug/l 0// 0:.00 ug/l 0// 0:.00 ug/l 0// 0:.00 ug/l 0// 0: Page 0 of 0 //0 (Rev. )

93 Client: AECOM Project/Site:.Hampstead.EL (MD) Client Sample ID: MW- Date Collected: 0// : Date Received: 0// :0 Client Sample Results Method: 0B - Volatile Organic Compounds (GC/MS) (Continued) RL MDL Unit TestAmerica Job ID: 0-- SDG: Hanover Pike, Hampstead, MD Lab Sample ID: 0--,,-Trichloroethane.00 ug/l 0// 0:,,-Trichloroethane Trichloroethene Trichlorofluoromethane Vinyl chloride m,p-xylene o-xylene Xylenes, Total Surrogate %Recovery Qualifier D.00 ug/l 0// 0:.00 ug/l 0// 0:.00 ug/l 0// 0:.00 ug/l 0// 0:.00 ug/l 0// 0:.00 ug/l 0// 0:.00 ug/l 0// 0: -Bromofluorobenzene (Surr) 0-0 0// 0: Dibromofluoromethane (Surr) 0-0 0// 0:,-Dichloroethane-d (Surr) 0-0 0// 0: Toluene-d (Surr) 0-0 0// 0: Method: 0C - Nonhalogenated Organics using GC/FID -Modified (Gasoline Range Organics) RL MDL Unit D Gasoline Range Organics [C - C] 0 ug/l 0// 0: Surrogate %Recovery Qualifier a,a,a-trifluorotoluene 0-0 0// 0: Page of 0 //0 (Rev. )

94 Client: AECOM Project/Site:.Hampstead.EL (MD) Client Sample ID: MW- Date Collected: 0// :0 Date Received: 0// :0 Method: 0B - Volatile Organic Compounds (GC/MS) Client Sample Results RL MDL TestAmerica Job ID: 0-- SDG: Hanover Pike, Hampstead, MD Lab Sample ID: 0-- Acetone.0 ug/l 0// 0: Benzene Bromochloromethane Bromodichloromethane Bromoform Bromomethane -Butanone (MEK) Carbon disulfide Carbon tetrachloride Chlorobenzene Chlorodibromomethane Chloroethane Chloroform Chloromethane cis-,-dichloroethene cis-,-dichloropropene Cyclohexane,-Dibromo--Chloropropane,-Dibromoethane (EDB),-Dichlorobenzene,-Dichlorobenzene,-Dichlorobenzene Dichlorodifluoromethane,-Dichloroethane,-Dichloroethane,-Dichloroethene,-Dichloropropane Diisopropyl ether Ethylbenzene Ethyl tert-butyl ether Freon -Hexanone Isopropylbenzene Methyl acetate * Methylcyclohexane Methylene Chloride -Methyl--pentanone (MIBK) * Methyl tert-butyl ether. Naphthalene Styrene Tert-amyl methyl ether tert-butyl alcohol (TBA),,,-Tetrachloroethane Tetrachloroethene Toluene trans-,-dichloroethene trans-,-dichloropropene,,-trichlorobenzene,,-trichlorobenzene Unit D.00 ug/l 0// 0:.00 ug/l 0// 0:.00 ug/l 0// 0:.00 ug/l 0// 0:.00 ug/l 0// 0: 0.0 ug/l 0// 0:.00 ug/l 0// 0:.00 ug/l 0// 0:.00 ug/l 0// 0:.00 ug/l 0// 0:.00 ug/l 0// 0:.00 ug/l 0// 0:.00 ug/l 0// 0:.00 ug/l 0// 0:.00 ug/l 0// 0:.00 ug/l 0// 0:.0 ug/l 0// 0:.00 ug/l 0// 0:.00 ug/l 0// 0:.00 ug/l 0// 0:.00 ug/l 0// 0:.00 ug/l 0// 0:.00 ug/l 0// 0:.00 ug/l 0// 0:.00 ug/l 0// 0:.00 ug/l 0// 0:.00 ug/l 0// 0:.00 ug/l 0// 0:.00 ug/l 0// 0:.00 ug/l 0// 0:.0 ug/l 0// 0:.00 ug/l 0// 0:.0 ug/l 0// 0:.00 ug/l 0// 0:.00 ug/l 0// 0:.0 ug/l 0// 0:.00 ug/l 0// 0:.00 ug/l 0// 0:.00 ug/l 0// 0:.00 ug/l 0// 0:.0 ug/l 0// 0:.00 ug/l 0// 0:.00 ug/l 0// 0:.00 ug/l 0// 0:.00 ug/l 0// 0:.00 ug/l 0// 0:.00 ug/l 0// 0:.00 ug/l 0// 0: Page of 0 //0 (Rev. )

95 Client: AECOM Project/Site:.Hampstead.EL (MD) Client Sample ID: MW- Date Collected: 0// :0 Date Received: 0// :0 Client Sample Results Method: 0B - Volatile Organic Compounds (GC/MS) (Continued) RL MDL Unit TestAmerica Job ID: 0-- SDG: Hanover Pike, Hampstead, MD Lab Sample ID: 0--,,-Trichloroethane.00 ug/l 0// 0:,,-Trichloroethane Trichloroethene Trichlorofluoromethane Vinyl chloride m,p-xylene o-xylene Xylenes, Total Surrogate %Recovery Qualifier D.00 ug/l 0// 0:.00 ug/l 0// 0:.00 ug/l 0// 0:.00 ug/l 0// 0:.00 ug/l 0// 0:.00 ug/l 0// 0:.00 ug/l 0// 0: -Bromofluorobenzene (Surr) 0-0 0// 0: Dibromofluoromethane (Surr) // 0:,-Dichloroethane-d (Surr) 0-0 0// 0: Toluene-d (Surr) 0-0 0// 0: Method: 0C - Nonhalogenated Organics using GC/FID -Modified (Gasoline Range Organics) RL MDL Unit D Gasoline Range Organics [C - C] 0 ug/l 0// 0:0 Surrogate %Recovery Qualifier a,a,a-trifluorotoluene 0-0 0// 0:0 Page of 0 //0 (Rev. )

96 Client: AECOM Project/Site:.Hampstead.EL (MD) Client Sample ID: MW- Date Collected: 0// : Date Received: 0// :0 Method: 0B - Volatile Organic Compounds (GC/MS) Client Sample Results RL MDL TestAmerica Job ID: 0-- SDG: Hanover Pike, Hampstead, MD Lab Sample ID: 0-- Acetone.0 ug/l 0// 0:0 Benzene Bromochloromethane Bromodichloromethane Bromoform Bromomethane -Butanone (MEK) Carbon disulfide Carbon tetrachloride Chlorobenzene Chlorodibromomethane Chloroethane Chloroform Chloromethane cis-,-dichloroethene cis-,-dichloropropene Cyclohexane,-Dibromo--Chloropropane,-Dibromoethane (EDB),-Dichlorobenzene,-Dichlorobenzene,-Dichlorobenzene Dichlorodifluoromethane,-Dichloroethane,-Dichloroethane,-Dichloroethene,-Dichloropropane Diisopropyl ether Ethylbenzene Ethyl tert-butyl ether Freon -Hexanone Isopropylbenzene Methyl acetate * Methylcyclohexane Methylene Chloride -Methyl--pentanone (MIBK) * Methyl tert-butyl ether Naphthalene Styrene Tert-amyl methyl ether tert-butyl alcohol (TBA),,,-Tetrachloroethane Tetrachloroethene Toluene trans-,-dichloroethene trans-,-dichloropropene,,-trichlorobenzene,,-trichlorobenzene Unit D.00 ug/l 0// 0:0.00 ug/l 0// 0:0.00 ug/l 0// 0:0.00 ug/l 0// 0:0.00 ug/l 0// 0:0 0.0 ug/l 0// 0:0.00 ug/l 0// 0:0.00 ug/l 0// 0:0.00 ug/l 0// 0:0.00 ug/l 0// 0:0.00 ug/l 0// 0:0.00 ug/l 0// 0:0.00 ug/l 0// 0:0.00 ug/l 0// 0:0.00 ug/l 0// 0:0.00 ug/l 0// 0:0.0 ug/l 0// 0:0.00 ug/l 0// 0:0.00 ug/l 0// 0:0.00 ug/l 0// 0:0.00 ug/l 0// 0:0.00 ug/l 0// 0:0.00 ug/l 0// 0:0.00 ug/l 0// 0:0.00 ug/l 0// 0:0.00 ug/l 0// 0:0.00 ug/l 0// 0:0.00 ug/l 0// 0:0.00 ug/l 0// 0:0.00 ug/l 0// 0:0.0 ug/l 0// 0:0.00 ug/l 0// 0:0.0 ug/l 0// 0:0.00 ug/l 0// 0:0.00 ug/l 0// 0:0.0 ug/l 0// 0:0.00 ug/l 0// 0:0.00 ug/l 0// 0:0.00 ug/l 0// 0:0.00 ug/l 0// 0:0.0 ug/l 0// 0:0.00 ug/l 0// 0:0.00 ug/l 0// 0:0.00 ug/l 0// 0:0.00 ug/l 0// 0:0.00 ug/l 0// 0:0.00 ug/l 0// 0:0.00 ug/l 0// 0:0 Page of 0 //0 (Rev. )

97 Client: AECOM Project/Site:.Hampstead.EL (MD) Client Sample ID: MW- Date Collected: 0// : Date Received: 0// :0 Client Sample Results Method: 0B - Volatile Organic Compounds (GC/MS) (Continued) RL MDL Unit TestAmerica Job ID: 0-- SDG: Hanover Pike, Hampstead, MD Lab Sample ID: 0--,,-Trichloroethane.00 ug/l 0// 0:0,,-Trichloroethane Trichloroethene Trichlorofluoromethane Vinyl chloride m,p-xylene o-xylene Xylenes, Total Surrogate %Recovery Qualifier D.00 ug/l 0// 0:0.00 ug/l 0// 0:0.00 ug/l 0// 0:0.00 ug/l 0// 0:0.00 ug/l 0// 0:0.00 ug/l 0// 0:0.00 ug/l 0// 0:0 -Bromofluorobenzene (Surr) 0-0 0// 0:0 Dibromofluoromethane (Surr) 0-0 0// 0:0,-Dichloroethane-d (Surr) 0-0 0// 0:0 Toluene-d (Surr) 0-0 0// 0:0 Method: 0C - Nonhalogenated Organics using GC/FID -Modified (Gasoline Range Organics) RL MDL Unit D Gasoline Range Organics [C - C] 0 ug/l 0// 0: Surrogate %Recovery Qualifier a,a,a-trifluorotoluene 0-0 0// 0: Page of 0 //0 (Rev. )

98 Client: AECOM Project/Site:.Hampstead.EL (MD) Client Sample ID: - Potable (P.O.U.) Date Collected: 0// :0 Date Received: 0// :0 Method:. - Volatile Organic Compounds (GC/MS) Client Sample Results RL MDL TestAmerica Job ID: 0-- SDG: Hanover Pike, Hampstead, MD Lab Sample ID: 0-- Benzene 0.00 ug/l 0// 0: Bromobenzene Bromochloromethane Bromodichloromethane Bromoform Bromomethane Carbon disulfide Carbon tetrachloride Chlorobenzene Chlorodibromomethane Chloroethane Chloroform Chloromethane -Chlorotoluene -Chlorotoluene cis-,-dichloroethene cis-,-dichloropropene,-dibromo--chloropropane,-dibromoethane (EDB) Dibromomethane,-Dichlorobenzene,-Dichlorobenzene,-Dichlorobenzene Dichlorodifluoromethane,-Dichloroethane,-Dichloroethane,-Dichloroethene,-Dichloropropane,-Dichloropropane,-Dichloropropane,-Dichloropropene Diisopropyl ether Ethylbenzene Ethyl tert-butyl ether Hexachlorobutadiene Isopropylbenzene Methylene Chloride * Methyl tert-butyl ether Naphthalene n-butylbenzene N-Propylbenzene p-isopropyltoluene sec-butylbenzene Styrene Tert-amyl methyl ether tert-butyl alcohol tert-butylbenzene,,,-tetrachloroethane,,,-tetrachloroethane Unit D 0.00 ug/l 0// 0: 0.00 ug/l 0// 0: 0.00 ug/l 0// 0: 0.00 ug/l 0// 0: 0.00 ug/l 0// 0: 0.00 ug/l 0// 0: 0.00 ug/l 0// 0: 0.00 ug/l 0// 0: 0.00 ug/l 0// 0: 0.00 ug/l 0// 0: 0.00 ug/l 0// 0: 0.00 ug/l 0// 0: 0.00 ug/l 0// 0: 0.00 ug/l 0// 0: 0.00 ug/l 0// 0: 0.00 ug/l 0// 0:.00 ug/l 0// 0: 0.00 ug/l 0// 0: 0.00 ug/l 0// 0: 0.00 ug/l 0// 0: 0.00 ug/l 0// 0: 0.00 ug/l 0// 0: 0.00 ug/l 0// 0: 0.00 ug/l 0// 0: 0.00 ug/l 0// 0: 0.00 ug/l 0// 0: 0.00 ug/l 0// 0: 0.00 ug/l 0// 0: 0.00 ug/l 0// 0: 0.00 ug/l 0// 0: 0.00 ug/l 0// 0: 0.00 ug/l 0// 0: 0.00 ug/l 0// 0: 0.00 ug/l 0// 0: 0.00 ug/l 0// 0:.00 ug/l 0// 0: 0.00 ug/l 0// 0:.00 ug/l 0// 0: 0.00 ug/l 0// 0: 0.00 ug/l 0// 0: 0.00 ug/l 0// 0: 0.00 ug/l 0// 0: 0.00 ug/l 0// 0: 0.00 ug/l 0// 0:.0 ug/l 0// 0: 0.00 ug/l 0// 0: 0.00 ug/l 0// 0: 0.00 ug/l 0// 0: Page of 0 //0 (Rev. )

99 Client: AECOM Project/Site:.Hampstead.EL (MD) Client Sample ID: - Potable (P.O.U.) Date Collected: 0// :0 Date Received: 0// :0 Client Sample Results Method:. - Volatile Organic Compounds (GC/MS) (Continued) RL MDL Unit TestAmerica Job ID: 0-- SDG: Hanover Pike, Hampstead, MD Lab Sample ID: 0-- Tetrachloroethene 0.00 ug/l 0// 0: Toluene trans-,-dichloroethene trans-,-dichloropropene,,-trichlorobenzene,,-trichlorobenzene,,-trichloroethane,,-trichloroethane Trichloroethene Trichlorofluoromethane,,-Trichloropropane,,-Trimethylbenzene,,-Trimethylbenzene Vinyl chloride Xylenes, Total D 0.00 ug/l 0// 0: 0.00 ug/l 0// 0: 0.00 ug/l 0// 0: 0.00 ug/l 0// 0: 0.00 ug/l 0// 0: 0.00 ug/l 0// 0: 0.00 ug/l 0// 0: 0.00 ug/l 0// 0: 0.00 ug/l 0// 0: 0.00 ug/l 0// 0: 0.00 ug/l 0// 0: 0.00 ug/l 0// 0: 0.00 ug/l 0// 0:.00 ug/l 0// 0: Surrogate %Recovery Qualifier -Bromofluorobenzene (Surr) 0-0 0// 0: Dibromofluoromethane (Surr) 0-0 0// 0:,-Dichloroethane-d (Surr) 0-0 0// 0: Toluene-d (Surr) 0-0 0// 0: Page of 0 //0 (Rev. )

100 QC Sample Results Client: AECOM TestAmerica Job ID: 0-- Project/Site:.Hampstead.EL (MD) SDG: Hanover Pike, Hampstead, MD Method:. - Volatile Organic Compounds (GC/MS) Lab Sample ID: MB 0-/ Client Sample ID: Method Blank Prep Type: Total/NA Analysis Batch: MB MB RL MDL Unit D Benzene 0.00 ug/l 0// : Bromobenzene 0.00 ug/l 0// : Bromochloromethane 0.00 ug/l 0// : Bromodichloromethane 0.00 ug/l 0// : Bromoform 0.00 ug/l 0// : Bromomethane 0.00 ug/l 0// : Carbon disulfide 0.00 ug/l 0// : Carbon tetrachloride 0.00 ug/l 0// : Chlorobenzene 0.00 ug/l 0// : Chlorodibromomethane 0.00 ug/l 0// : Chloroethane 0.00 ug/l 0// : Chloroform 0.00 ug/l 0// : Chloromethane 0.00 ug/l 0// : -Chlorotoluene 0.00 ug/l 0// : -Chlorotoluene 0.00 ug/l 0// : cis-,-dichloroethene 0.00 ug/l 0// : cis-,-dichloropropene 0.00 ug/l 0// :,-Dibromo--Chloropropane.00 ug/l 0// :,-Dibromoethane (EDB) 0.00 ug/l 0// : Dibromomethane 0.00 ug/l 0// :,-Dichlorobenzene 0.00 ug/l 0// :,-Dichlorobenzene 0.00 ug/l 0// :,-Dichlorobenzene 0.00 ug/l 0// : Dichlorodifluoromethane 0.00 ug/l 0// :,-Dichloroethane 0.00 ug/l 0// :,-Dichloroethane 0.00 ug/l 0// :,-Dichloroethene 0.00 ug/l 0// :,-Dichloropropane 0.00 ug/l 0// :,-Dichloropropane 0.00 ug/l 0// :,-Dichloropropane 0.00 ug/l 0// :,-Dichloropropene 0.00 ug/l 0// : Diisopropyl ether 0.00 ug/l 0// : Ethylbenzene 0.00 ug/l 0// : Ethyl tert-butyl ether 0.00 ug/l 0// : Hexachlorobutadiene 0.00 ug/l 0// : Isopropylbenzene 0.00 ug/l 0// : Methylene Chloride.00 ug/l 0// : Methyl tert-butyl ether 0.00 ug/l 0// : Naphthalene.00 ug/l 0// : n-butylbenzene 0.00 ug/l 0// : N-Propylbenzene 0.00 ug/l 0// : p-isopropyltoluene 0.00 ug/l 0// : sec-butylbenzene 0.00 ug/l 0// : Styrene 0.00 ug/l 0// : Tert-amyl methyl ether 0.00 ug/l 0// : tert-butyl alcohol.0 ug/l 0// : tert-butylbenzene 0.00 ug/l 0// :,,,-Tetrachloroethane 0.00 ug/l 0// : Page of 0 //0 (Rev. )

101 QC Sample Results Client: AECOM TestAmerica Job ID: 0-- Project/Site:.Hampstead.EL (MD) SDG: Hanover Pike, Hampstead, MD Method:. - Volatile Organic Compounds (GC/MS) (Continued) Lab Sample ID: MB 0-/ Client Sample ID: Method Blank Prep Type: Total/NA Analysis Batch: MB MB RL MDL Unit D,,,-Tetrachloroethane 0.00 ug/l 0// : Tetrachloroethene 0.00 ug/l 0// : Toluene 0.00 ug/l 0// : trans-,-dichloroethene 0.00 ug/l 0// : trans-,-dichloropropene 0.00 ug/l 0// :,,-Trichlorobenzene 0.00 ug/l 0// :,,-Trichlorobenzene 0.00 ug/l 0// :,,-Trichloroethane 0.00 ug/l 0// :,,-Trichloroethane 0.00 ug/l 0// : Trichloroethene 0.00 ug/l 0// : Trichlorofluoromethane 0.00 ug/l 0// :,,-Trichloropropane 0.00 ug/l 0// :,,-Trimethylbenzene 0.00 ug/l 0// :,,-Trimethylbenzene 0.00 ug/l 0// : Vinyl chloride 0.00 ug/l 0// : Xylenes, Total.00 ug/l 0// : Surrogate %Recovery MB MB Qualifier -Bromofluorobenzene (Surr) 0-0 0// : Dibromofluoromethane (Surr) // :,-Dichloroethane-d (Surr) 0-0 0// : Toluene-d (Surr) 0-0 0// : Lab Sample ID: LCS 0-/ Analysis Batch: Spike Added LCS LCS Client Sample ID: Lab Control Sample Prep Type: Total/NA Benzene.00. ug/l 0-0 Bromobenzene.00.0 ug/l 0-0 Bromochloromethane.00. ug/l 0-0 Bromodichloromethane.00. ug/l 0-0 Bromoform.00. ug/l 0-0 Bromomethane.00. ug/l Carbon disulfide.00.0 ug/l 0-0 Carbon tetrachloride.00. ug/l 0-0 Chlorobenzene.00. ug/l 0-0 Chlorodibromomethane.00. ug/l 0-0 Chloroethane.00. ug/l 0-0 Chloroform.00. ug/l 0-0 Chloromethane.00. ug/l 0-0 -Chlorotoluene.00. ug/l 0-0 -Chlorotoluene.00. ug/l 0-0 cis-,-dichloroethene.00. ug/l 0-0 cis-,-dichloropropene.00. ug/l 0-0,-Dibromo--Chloropropane.00. ug/l 0-0,-Dibromoethane (EDB).00. ug/l 0-0 Dibromomethane.00. ug/l 0-0 Unit D %Rec %Rec. Page of 0 //0 (Rev. )

102 QC Sample Results Client: AECOM TestAmerica Job ID: 0-- Project/Site:.Hampstead.EL (MD) SDG: Hanover Pike, Hampstead, MD Method:. - Volatile Organic Compounds (GC/MS) (Continued) Lab Sample ID: LCS 0-/ Client Sample ID: Lab Control Sample Prep Type: Total/NA Analysis Batch: Spike LCS LCS %Rec. Added Unit D %Rec,-Dichlorobenzene.00. ug/l 0-0,-Dichlorobenzene.00.0 ug/l 0-0,-Dichlorobenzene.00. ug/l 0-0 Dichlorodifluoromethane.00. ug/l 0-0,-Dichloroethane.00. ug/l 0-0,-Dichloroethane ug/l 0-0,-Dichloroethene.00. ug/l 0-0,-Dichloropropane.00.0 ug/l 0-0,-Dichloropropane.00. ug/l 0-0,-Dichloropropane.00.0 ug/l 0-0,-Dichloropropene.00.0 ug/l 0-0 Diisopropyl ether.00. ug/l 0-0 Ethylbenzene.00. ug/l 0-0 Ethyl tert-butyl ether.00. ug/l 0-0 Hexachlorobutadiene.00.0 ug/l Isopropylbenzene.00. ug/l 0-0 Methylene Chloride.00. * ug/l 0-0 Methyl tert-butyl ether.00. ug/l 0-0 Naphthalene.00. ug/l 0-0 n-butylbenzene.00. ug/l 0-0 N-Propylbenzene.00.0 ug/l 0-0 p-isopropyltoluene.00. ug/l 0-0 sec-butylbenzene.00.0 ug/l 0-0 Styrene.00.0 ug/l 0-0 Tert-amyl methyl ether.00. ug/l tert-butyl alcohol 0.0. ug/l 0-0 tert-butylbenzene.00. ug/l 0-0,,,-Tetrachloroethane.00. ug/l 0-0,,,-Tetrachloroethane.00. ug/l 0-0 Tetrachloroethene.00. ug/l 0-0 Toluene.00. ug/l 0-0 trans-,-dichloroethene.00. ug/l 0-0 trans-,-dichloropropene.00. ug/l 0-0,,-Trichlorobenzene.00. ug/l 0-0,,-Trichlorobenzene.00.0 ug/l 0-0,,-Trichloroethane.00. ug/l 0 0-0,,-Trichloroethane.00. ug/l 0-0 Trichloroethene.00. ug/l 0-0 Trichlorofluoromethane.00. ug/l 0-0,,-Trichloropropane.00. ug/l 0-0,,-Trimethylbenzene.00. ug/l 0-0,,-Trimethylbenzene.00. ug/l 0-0 Vinyl chloride.00. ug/l 0-0 Xylenes, Total.0. ug/l 0-0 Surrogate %Recovery LCS LCS Qualifier -Bromofluorobenzene (Surr) 0-0 Dibromofluoromethane (Surr) 0-0 Page 0 of 0 //0 (Rev. )

103 Client: AECOM Project/Site:.Hampstead.EL (MD) QC Sample Results Method:. - Volatile Organic Compounds (GC/MS) (Continued) Lab Sample ID: LCS 0-/ Analysis Batch: Surrogate %Recovery LCS LCS Qualifier,-Dichloroethane-d (Surr) 0-0 Toluene-d (Surr) 0-0 Lab Sample ID: LCSD 0-/ Analysis Batch: Spike Added LCSD LCSD TestAmerica Job ID: 0-- SDG: Hanover Pike, Hampstead, MD Client Sample ID: Lab Control Sample Prep Type: Total/NA Client Sample ID: Lab Control Sample Dup Prep Type: Total/NA Benzene.00. ug/l Bromobenzene.00. ug/l Bromochloromethane.00. ug/l Bromodichloromethane.00. ug/l Bromoform.00.0 ug/l Bromomethane.00. ug/l Carbon disulfide.00. ug/l Carbon tetrachloride.00. ug/l Chlorobenzene.00. ug/l Chlorodibromomethane.00. ug/l Chloroethane.00.0 ug/l Chloroform.00. ug/l Chloromethane.00. ug/l Chlorotoluene.00. ug/l Chlorotoluene.00. ug/l cis-,-dichloroethene.00.0 ug/l cis-,-dichloropropene.00. ug/l 0-0 0,-Dibromo--Chloropropane.00. ug/l ,-Dibromoethane (EDB).00. ug/l Dibromomethane.00. ug/l 0-0 0,-Dichlorobenzene.00. ug/l 0-0 0,-Dichlorobenzene.00. ug/l 0-0 0,-Dichlorobenzene.00. ug/l Dichlorodifluoromethane.00. ug/l 0-0 0,-Dichloroethane.00. ug/l 0-0 0,-Dichloroethane.00.0 ug/l 0-0 0,-Dichloroethene.00.0 ug/l 0-0 0,-Dichloropropane.00. ug/l 0-0 0,-Dichloropropane.00. ug/l 0-0 0,-Dichloropropane.00. ug/l ,-Dichloropropene.00. ug/l Diisopropyl ether.00. ug/l Ethylbenzene.00.0 ug/l Ethyl tert-butyl ether.00. ug/l Hexachlorobutadiene.00. ug/l Isopropylbenzene.00. ug/l Methylene Chloride.00. * ug/l Methyl tert-butyl ether.00. ug/l Naphthalene.00. ug/l n-butylbenzene.00. ug/l Unit D %Rec %Rec. RPD RPD Limit Page of 0 //0 (Rev. )

104 QC Sample Results Client: AECOM TestAmerica Job ID: 0-- Project/Site:.Hampstead.EL (MD) SDG: Hanover Pike, Hampstead, MD Method:. - Volatile Organic Compounds (GC/MS) (Continued) Lab Sample ID: LCSD 0-/ Client Sample ID: Lab Control Sample Dup Prep Type: Total/NA Analysis Batch: Spike LCSD LCSD %Rec. RPD Added Unit D %Rec RPD Limit N-Propylbenzene.00. ug/l p-isopropyltoluene.00. ug/l sec-butylbenzene.00. ug/l Styrene.00.0 ug/l Tert-amyl methyl ether.00. ug/l tert-butyl alcohol 0.0. ug/l tert-butylbenzene.00. ug/l 0-0 0,,,-Tetrachloroethane.00. ug/l 0-0 0,,,-Tetrachloroethane.00. ug/l Tetrachloroethene.00.0 ug/l Toluene.00. ug/l trans-,-dichloroethene.00. ug/l trans-,-dichloropropene.00. ug/l 0-0 0,,-Trichlorobenzene.00.0 ug/l ,,-Trichlorobenzene.00. ug/l 0-0 0,,-Trichloroethane.00.0 ug/l 0-0 0,,-Trichloroethane.00. ug/l Trichloroethene.00. ug/l Trichlorofluoromethane.00.0 ug/l ,,-Trichloropropane.00.0 ug/l 0-0 0,,-Trimethylbenzene.00. ug/l ,,-Trimethylbenzene.00. ug/l Vinyl chloride.00. ug/l Xylenes, Total.0. ug/l Surrogate LCSD LCSD %Recovery Qualifier -Bromofluorobenzene (Surr) 0-0 Dibromofluoromethane (Surr) 0-0,-Dichloroethane-d (Surr) 0-0 Toluene-d (Surr) Method: 0B - Volatile Organic Compounds (GC/MS) Lab Sample ID: MB 0-/ Analysis Batch: MB MB RL MDL Client Sample ID: Method Blank Prep Type: Total/NA Acetone.0 ug/l 0// 0:0 Benzene Bromochloromethane Bromodichloromethane Bromoform Bromomethane -Butanone (MEK) Carbon disulfide Carbon tetrachloride Chlorobenzene Unit D.00 ug/l 0// 0:0.00 ug/l 0// 0:0.00 ug/l 0// 0:0.00 ug/l 0// 0:0.00 ug/l 0// 0:0 0.0 ug/l 0// 0:0.00 ug/l 0// 0:0.00 ug/l 0// 0:0.00 ug/l 0// 0:0 Page of 0 //0 (Rev. )

105 QC Sample Results Client: AECOM TestAmerica Job ID: 0-- Project/Site:.Hampstead.EL (MD) SDG: Hanover Pike, Hampstead, MD Method: 0B - Volatile Organic Compounds (GC/MS) (Continued) Lab Sample ID: MB 0-/ Client Sample ID: Method Blank Prep Type: Total/NA Analysis Batch: MB MB RL MDL Unit D Chlorodibromomethane.00 ug/l 0// 0:0 Chloroethane.00 ug/l 0// 0:0 Chloroform.00 ug/l 0// 0:0 Chloromethane.00 ug/l 0// 0:0 cis-,-dichloroethene.00 ug/l 0// 0:0 cis-,-dichloropropene.00 ug/l 0// 0:0 Cyclohexane.00 ug/l 0// 0:0,-Dibromo--Chloropropane.0 ug/l 0// 0:0,-Dibromoethane (EDB).00 ug/l 0// 0:0,-Dichlorobenzene.00 ug/l 0// 0:0,-Dichlorobenzene.00 ug/l 0// 0:0,-Dichlorobenzene.00 ug/l 0// 0:0 Dichlorodifluoromethane.00 ug/l 0// 0:0,-Dichloroethane.00 ug/l 0// 0:0,-Dichloroethane.00 ug/l 0// 0:0,-Dichloroethene.00 ug/l 0// 0:0,-Dichloropropane.00 ug/l 0// 0:0 Diisopropyl ether.00 ug/l 0// 0:0 Ethylbenzene.00 ug/l 0// 0:0 Ethyl tert-butyl ether.00 ug/l 0// 0:0 Freon.00 ug/l 0// 0:0 -Hexanone.0 ug/l 0// 0:0 Isopropylbenzene.00 ug/l 0// 0:0 Methyl acetate.0 ug/l 0// 0:0 Methylcyclohexane.00 ug/l 0// 0:0 Methylene Chloride.00 ug/l 0// 0:0 -Methyl--pentanone (MIBK).0 ug/l 0// 0:0 Methyl tert-butyl ether.00 ug/l 0// 0:0 Naphthalene.00 ug/l 0// 0:0 Styrene.00 ug/l 0// 0:0 Tert-amyl methyl ether.00 ug/l 0// 0:0 tert-butyl alcohol (TBA).0 ug/l 0// 0:0,,,-Tetrachloroethane.00 ug/l 0// 0:0 Tetrachloroethene.00 ug/l 0// 0:0 Toluene.00 ug/l 0// 0:0 trans-,-dichloroethene.00 ug/l 0// 0:0 trans-,-dichloropropene.00 ug/l 0// 0:0,,-Trichlorobenzene.00 ug/l 0// 0:0,,-Trichlorobenzene.00 ug/l 0// 0:0,,-Trichloroethane.00 ug/l 0// 0:0,,-Trichloroethane.00 ug/l 0// 0:0 Trichloroethene.00 ug/l 0// 0:0 Trichlorofluoromethane.00 ug/l 0// 0:0 Vinyl chloride.00 ug/l 0// 0:0 m,p-xylene.00 ug/l 0// 0:0 o-xylene.00 ug/l 0// 0:0 Xylenes, Total.00 ug/l 0// 0:0 Page of 0 //0 (Rev. )

106 Client: AECOM Project/Site:.Hampstead.EL (MD) QC Sample Results Method: 0B - Volatile Organic Compounds (GC/MS) (Continued) Lab Sample ID: MB 0-/ Analysis Batch: Surrogate %Recovery MB MB Qualifier TestAmerica Job ID: 0-- SDG: Hanover Pike, Hampstead, MD Client Sample ID: Method Blank Prep Type: Total/NA -Bromofluorobenzene (Surr) 0-0 0// 0:0 Dibromofluoromethane (Surr) 0-0 0// 0:0,-Dichloroethane-d (Surr) 0-0 0// 0:0 Toluene-d (Surr) 0-0 0// 0:0 Lab Sample ID: LCS 0-/ Analysis Batch: Spike Added LCS LCS Client Sample ID: Lab Control Sample Prep Type: Total/NA Acetone 0. ug/l - 0 Benzene 0.0. ug/l 0-0 Bromochloromethane ug/l 0-0 Bromodichloromethane 0.0. ug/l 0-0 Bromoform 0.0. ug/l 0 - Bromomethane 0.0. ug/l - 0 -Butanone (MEK) 0. ug/l - Carbon disulfide 0.0. ug/l - Carbon tetrachloride 0.0. ug/l 0 - Chlorobenzene 0.0. ug/l 0-0 Chlorodibromomethane ug/l 0 - Chloroethane 0.0. ug/l 0 - Chloroform ug/l 0-0 Chloromethane 0.0. ug/l - 0 cis-,-dichloroethene 0.0. ug/l 0-0 cis-,-dichloropropene 0.0. ug/l 0 - Cyclohexane 0.0. ug/l 0 -,-Dibromo--Chloropropane 0.0. ug/l -,-Dibromoethane (EDB) ug/l 0-0,-Dichlorobenzene ug/l 0-0,-Dichlorobenzene 0.0. ug/l 0-0,-Dichlorobenzene 0.0. ug/l 0-0 Dichlorodifluoromethane 0.0. ug/l - 0,-Dichloroethane ug/l 0-0,-Dichloroethane 0.0. ug/l 0-0,-Dichloroethene ug/l 0 -,-Dichloropropane 0.0. ug/l 0-0 Diisopropyl ether 0.0. ug/l - Ethylbenzene 0.0. ug/l Ethyl tert-butyl ether 0.0. ug/l - Freon 0.0. ug/l - -Hexanone 0. ug/l - Isopropylbenzene ug/l Methyl acetate 0.0. * ug/l - Methylcyclohexane 0.0. ug/l 0 - Methylene Chloride 0.0. ug/l 0-0 -Methyl--pentanone (MIBK) 0. ug/l 0 - Methyl tert-butyl ether 0.0. ug/l 0-0 Unit D %Rec %Rec. Page of 0 //0 (Rev. )

107 QC Sample Results Client: AECOM TestAmerica Job ID: 0-- Project/Site:.Hampstead.EL (MD) SDG: Hanover Pike, Hampstead, MD Method: 0B - Volatile Organic Compounds (GC/MS) (Continued) Lab Sample ID: LCS 0-/ Client Sample ID: Lab Control Sample Prep Type: Total/NA Analysis Batch: Spike LCS LCS %Rec. Added Unit D %Rec Naphthalene 0.0. ug/l - 0 Styrene ug/l Tert-amyl methyl ether 0.0. ug/l - tert-butyl alcohol (TBA) 00. ug/l - 0,,,-Tetrachloroethane 0.0. ug/l 0 - Tetrachloroethene ug/l 0-0 Toluene 0.0. ug/l trans-,-dichloroethene 0.0. ug/l 0-0 trans-,-dichloropropene 0.0. ug/l -,,-Trichlorobenzene 0.0. ug/l - 0,,-Trichlorobenzene 0.0. ug/l -,,-Trichloroethane ug/l 0 -,,-Trichloroethane ug/l 0-0 Trichloroethene ug/l 0-0 Trichlorofluoromethane 0.0. ug/l - 0 Vinyl chloride ug/l - m,p-xylene 0.0. ug/l 0-0 o-xylene ug/l 0-0 Xylenes, Total 0.0. ug/l 0 - Surrogate %Recovery LCS LCS Qualifier -Bromofluorobenzene (Surr) 0-0 Dibromofluoromethane (Surr) 0-0,-Dichloroethane-d (Surr) 0-0 Toluene-d (Surr) 0-0 Lab Sample ID: LCSD 0-/ Analysis Batch: Spike Added LCSD LCSD Client Sample ID: Lab Control Sample Dup Prep Type: Total/NA Acetone 0 0. ug/l 0-0 Benzene 0.0. ug/l 0-0 Bromochloromethane ug/l 0-0 Bromodichloromethane 0.0. ug/l 0-0 Bromoform 0.0. ug/l 0 - Bromomethane 0.0. ug/l - 0 -Butanone (MEK) 0. ug/l - Carbon disulfide ug/l - Carbon tetrachloride ug/l 0 - Chlorobenzene 0.0. ug/l 0-0 Chlorodibromomethane 0.0. ug/l 0 - Chloroethane 0.0. ug/l 0 - Chloroform ug/l 0-0 Chloromethane ug/l cis-,-dichloroethene ug/l 0-0 cis-,-dichloropropene 0.0. ug/l 0 - Cyclohexane 0.0. ug/l 0-0 Unit D %Rec %Rec. RPD RPD Limit Page of 0 //0 (Rev. )

108 QC Sample Results Client: AECOM TestAmerica Job ID: 0-- Project/Site:.Hampstead.EL (MD) SDG: Hanover Pike, Hampstead, MD Method: 0B - Volatile Organic Compounds (GC/MS) (Continued) Lab Sample ID: LCSD 0-/ Client Sample ID: Lab Control Sample Dup Prep Type: Total/NA Analysis Batch: Spike LCSD LCSD %Rec. RPD Added Unit D %Rec RPD Limit,-Dibromo--Chloropropane 0.0. ug/l -,-Dibromoethane (EDB) ug/l 0-0,-Dichlorobenzene 0.0. ug/l 0-0 0,-Dichlorobenzene 0.0. ug/l 0-0,-Dichlorobenzene ug/l 0-0 Dichlorodifluoromethane 0.0. ug/l - 0,-Dichloroethane 0.0. ug/l 0-0,-Dichloroethane 0.0. ug/l 0-0,-Dichloroethene 0.0. ug/l 0-0,-Dichloropropane 0.0. ug/l 0-0 Diisopropyl ether ug/l 0 - Ethylbenzene ug/l Ethyl tert-butyl ether ug/l - 0 Freon 0.0. ug/l - -Hexanone 0. ug/l - Isopropylbenzene 0.0. ug/l 0 - Methyl acetate * ug/l 0 - Methylcyclohexane ug/l 0 - Methylene Chloride 0.0. ug/l Methyl--pentanone (MIBK) 0. * ug/l 0 - Methyl tert-butyl ether 0.0. ug/l Naphthalene 0.0. ug/l - 0 Styrene ug/l Tert-amyl methyl ether 0.0. ug/l - tert-butyl alcohol (TBA) 00. ug/l - 0,,,-Tetrachloroethane 0.0. ug/l - Tetrachloroethene 0.0. ug/l 0-0 Toluene 0.0. ug/l trans-,-dichloroethene 0.0. ug/l 0-0 trans-,-dichloropropene 0.0. ug/l -,,-Trichlorobenzene 0.0. ug/l - 0,,-Trichlorobenzene 0.0. ug/l -,,-Trichloroethane ug/l 0 -,,-Trichloroethane 0.0. ug/l 0-0 Trichloroethene 0.0. ug/l Trichlorofluoromethane 0.0. ug/l - 0 Vinyl chloride 0.0. ug/l - m,p-xylene 0.0. ug/l o-xylene 0.0. ug/l 0-0 Xylenes, Total ug/l 0-0 Surrogate LCSD LCSD %Recovery Qualifier -Bromofluorobenzene (Surr) 0-0 Dibromofluoromethane (Surr) 0-0,-Dichloroethane-d (Surr) 0-0 Toluene-d (Surr) 0-0 Page of 0 //0 (Rev. )

109 QC Sample Results Client: AECOM TestAmerica Job ID: 0-- Project/Site:.Hampstead.EL (MD) SDG: Hanover Pike, Hampstead, MD Method: 0B - Volatile Organic Compounds (GC/MS) (Continued) Lab Sample ID: 0--C- MS Analysis Batch: Sample Client Sample ID: Matrix Spike Prep Type: Total/NA Sample Spike MS MS %Rec. Added Unit D %Rec Acetone ug/l - 0 Benzene 0 00 ug/l - Bromochloromethane 00 0 ug/l 0 - Bromodichloromethane 00 ug/l 0-0 Bromoform 00 ug/l - 0 Bromomethane 00. ug/l 0-0 -Butanone (MEK) ug/l Carbon disulfide 00. ug/l - 0 Carbon tetrachloride 00 0 ug/l - 0 Chlorobenzene 00. ug/l 0-0 Chlorodibromomethane 00 ug/l - 0 Chloroethane 00. ug/l - Chloroform 00. ug/l - Chloromethane 00 ug/l - 0 cis-,-dichloroethene 00 0 ug/l 0 - cis-,-dichloropropene 00. ug/l 0 - Cyclohexane 00 ug/l - 0,-Dibromo--Chloropropane 00 ug/l -,-Dibromoethane (EDB) 00 ug/l -,-Dichlorobenzene 00.0 ug/l 0-0,-Dichlorobenzene ug/l -,-Dichlorobenzene 00. ug/l 0-0 Dichlorodifluoromethane 00. ug/l - 0,-Dichloroethane 00. ug/l -,-Dichloroethane 00 ug/l -,-Dichloroethene 00. ug/l - 0,-Dichloropropane 00 0 ug/l 0-0 Diisopropyl ether 00 ug/l - Ethylbenzene 00 ug/l - Ethyl tert-butyl ether 00 ug/l - Freon 00. ug/l - 0 -Hexanone 000 ug/l - 0 Isopropylbenzene 00. ug/l 0 - Methyl acetate 00 * ug/l - Methylcyclohexane 00 ug/l - 0 Methylene Chloride 00 ug/l - 0 -Methyl--pentanone (MIBK) * 000 ug/l 0-0 Methyl tert-butyl ether 00 ug/l - Naphthalene 00. ug/l - 0 Styrene 00. ug/l 0-0 Tert-amyl methyl ether 00 ug/l - tert-butyl alcohol (TBA) ug/l 0-0,,,-Tetrachloroethane 00 ug/l - Tetrachloroethene 00. ug/l - Toluene ug/l - trans-,-dichloroethene 00 ug/l - trans-,-dichloropropene 00. ug/l -,,-Trichlorobenzene ug/l 0-0 Page of 0 //0 (Rev. )

110 Client: AECOM Project/Site:.Hampstead.EL (MD) QC Sample Results Method: 0B - Volatile Organic Compounds (GC/MS) (Continued) Lab Sample ID: 0--C- MS Analysis Batch: Sample Sample Result Qualifier Spike Added MS MS TestAmerica Job ID: 0-- SDG: Hanover Pike, Hampstead, MD Client Sample ID: Matrix Spike Prep Type: Total/NA,,-Trichlorobenzene 00. ug/l -,,-Trichloroethane 00 ug/l -,,-Trichloroethane 00 ug/l 0-0 Trichloroethene 00. ug/l - Trichlorofluoromethane 00. ug/l - 0 Vinyl chloride 00. ug/l - 0 m,p-xylene 00 ug/l 0-0 o-xylene 00 ug/l 0 - Xylenes, Total 000 ug/l - Surrogate %Recovery MS MS Qualifier -Bromofluorobenzene (Surr) 0-0 Dibromofluoromethane (Surr) 0-0,-Dichloroethane-d (Surr) 0-0 Toluene-d (Surr) 0-0 Unit D %Rec %Rec. Lab Sample ID: 0--C- MSD Client Sample ID: Matrix Spike Duplicate Prep Type: Total/NA Analysis Batch: Sample Sample Spike MSD MSD %Rec. RPD Added Unit D %Rec RPD Limit Acetone ug/l Benzene 0 00 ug/l - Bromochloromethane 00. ug/l - Bromodichloromethane 00 ug/l Bromoform 00 0 ug/l Bromomethane 00. ug/l 0-0 -Butanone (MEK) 000 ug/l 0 - Carbon disulfide 00. ug/l Carbon tetrachloride 00. ug/l 0-0 Chlorobenzene 00. ug/l 0-0 Chlorodibromomethane 00 ug/l - 0 Chloroethane 00. ug/l - Chloroform 00. ug/l - Chloromethane 00 ug/l - 0 cis-,-dichloroethene 00 ug/l - cis-,-dichloropropene 00. ug/l Cyclohexane 00 ug/l - 0 0,-Dibromo--Chloropropane 00 ug/l -,-Dibromoethane (EDB) 00 ug/l -,-Dichlorobenzene 00. ug/l 0-0,-Dichlorobenzene 00. ug/l -,-Dichlorobenzene 00. ug/l 0-0 Dichlorodifluoromethane 00. ug/l - 0 0,-Dichloroethane 00. ug/l -,-Dichloroethane 00 ug/l -,-Dichloroethene 00. ug/l - 0,-Dichloropropane 00 ug/l - 0 Page of 0 //0 (Rev. )

111 QC Sample Results Client: AECOM TestAmerica Job ID: 0-- Project/Site:.Hampstead.EL (MD) SDG: Hanover Pike, Hampstead, MD Method: 0B - Volatile Organic Compounds (GC/MS) (Continued) Lab Sample ID: 0--C- MSD Client Sample ID: Matrix Spike Duplicate Prep Type: Total/NA Analysis Batch: Sample Sample Spike MSD MSD %Rec. RPD Added Unit D %Rec RPD Limit Diisopropyl ether 00 ug/l - 0 Ethylbenzene 00 ug/l - Ethyl tert-butyl ether ug/l 0 - Freon 00. ug/l Hexanone 000 ug/l - 0 Isopropylbenzene 00. ug/l 0 - Methyl acetate 00 * ug/l - Methylcyclohexane 00 ug/l Methylene Chloride 00 ug/l - 0 -Methyl--pentanone (MIBK) * ug/l 0-0 Methyl tert-butyl ether 00 ug/l - Naphthalene 00. ug/l Styrene 00. ug/l Tert-amyl methyl ether 00 ug/l 0 - tert-butyl alcohol (TBA) 000 ug/l - 0,,,-Tetrachloroethane 00 ug/l 0 - Tetrachloroethene 00. ug/l - Toluene ug/l - trans-,-dichloroethene 00 ug/l - 0 trans-,-dichloropropene 00 ug/l -,,-Trichlorobenzene 00. ug/l - 0,,-Trichlorobenzene ug/l -,,-Trichloroethane 00. ug/l 0 -,,-Trichloroethane 00 ug/l 0-0 Trichloroethene 00. ug/l - Trichlorofluoromethane 00. ug/l - 0 Vinyl chloride 00. ug/l - 0 m,p-xylene 00 ug/l 0-0 o-xylene 00 0 ug/l 0 - Xylenes, Total 000 ug/l - Surrogate %Recovery MSD MSD Qualifier -Bromofluorobenzene (Surr) 0-0 Dibromofluoromethane (Surr) 0-0,-Dichloroethane-d (Surr) 0-0 Toluene-d (Surr) 0-0 Method: 0C - Nonhalogenated Organics using GC/FID -Modified (Gasoline Range Organics) Lab Sample ID: MB 0-/ Analysis Batch: MB MB RL MDL Client Sample ID: Method Blank Prep Type: Total/NA Gasoline Range Organics [C - C] 0 ug/l 0// : Unit D Page of 0 //0 (Rev. )

112 Client: AECOM Project/Site:.Hampstead.EL (MD) QC Sample Results TestAmerica Job ID: 0-- SDG: Hanover Pike, Hampstead, MD Method: 0C - Nonhalogenated Organics using GC/FID -Modified (Gasoline Range Organics) (Continued) Lab Sample ID: MB 0-/ Analysis Batch: Surrogate %Recovery MB MB Qualifier Client Sample ID: Method Blank Prep Type: Total/NA a,a,a-trifluorotoluene 0-0 0// : Lab Sample ID: LCS 0-/ Analysis Batch: Gasoline Range Organics [C - C] Surrogate %Recovery LCS LCS Qualifier Spike Added a,a,a-trifluorotoluene 0-0 LCS LCS Unit Client Sample ID: Lab Control Sample Prep Type: Total/NA 00 ug/l - 0 D %Rec %Rec. Lab Sample ID: LCSD 0-/ Analysis Batch: Gasoline Range Organics [C - C] Surrogate LCSD LCSD %Recovery Qualifier Spike Added a,a,a-trifluorotoluene 0-0 Lab Sample ID: 0-- MS Analysis Batch: Sample Sample Gasoline Range Organics [C - C] Surrogate Result Qualifier LCSD LCSD Client Sample ID: Lab Control Sample Dup Prep Type: Total/NA Unit 00 ug/l - 0 Spike Added a,a,a-trifluorotoluene 0-0 Gasoline Range Organics [C - C] %Recovery MS MS D %Rec %Rec. 00. ug/l - MS MS Qualifier Lab Sample ID: 0-- MSD Analysis Batch: Sample Sample Surrogate Result %Recovery Qualifier Spike Added a,a,a-trifluorotoluene 0-0 MSD MSD Unit D RPD RPD Limit Client Sample ID: MW- Prep Type: Total/NA %Rec %Rec. Client Sample ID: MW- Prep Type: Total/NA 00. ug/l - MSD MSD Qualifier Unit D %Rec %Rec. RPD RPD Limit Page 0 of 0 //0 (Rev. )

113 Client: AECOM Project/Site:.Hampstead.EL (MD) GC/MS VOA Analysis Batch: QC Association Summary TestAmerica Job ID: 0-- SDG: Hanover Pike, Hampstead, MD Lab Sample ID Client Sample ID Prep Type Matrix Method Prep Batch Potable (P.O.U.) Total/NA Water. MB 0-/ Method Blank Total/NA LCS 0-/ Lab Control Sample Total/NA LCSD 0-/ Lab Control Sample Dup Total/NA Analysis Batch: Water. Water. Water. Lab Sample ID Client Sample ID Prep Type Matrix Method Prep Batch 0-- MW- Total/NA Water 0B 0-- MW- Total/NA 0-- MW- Total/NA 0-- MW- Total/NA 0-- MW- Total/NA 0-- MW- Total/NA 0-- MW- Total/NA 0-- MW- Total/NA 0-- MW- Total/NA 0-- MW- Total/NA MB 0-/ Method Blank Total/NA LCS 0-/ Lab Control Sample Total/NA LCSD 0-/ Lab Control Sample Dup Total/NA 0--C- MS Matrix Spike Total/NA 0--C- MSD Matrix Spike Duplicate Total/NA Water Water Water Water Water Water Water Water Water Water Water Water Water Water 0B 0B 0B 0B 0B 0B 0B 0B 0B 0B 0B 0B 0B 0B GC VOA Analysis Batch: Lab Sample ID Client Sample ID Prep Type Matrix Method Prep Batch 0-- MW- Total/NA Water 0C 0-- MW- Total/NA Water 0C 0-- MW- Total/NA Water 0C 0-- MW- Total/NA Water 0C 0-- MW- Total/NA Water 0C 0-- MW- Total/NA Water 0C 0-- MW- Total/NA Water 0C 0-- MW- Total/NA Water 0C 0-- MW- Total/NA Water 0C 0-- MW- Total/NA Water 0C MB 0-/ Method Blank Total/NA Water 0C LCS 0-/ Lab Control Sample Total/NA Water 0C LCSD 0-/ Lab Control Sample Dup Total/NA Water 0C 0-- MS MW- Total/NA Water 0C 0-- MSD MW- Total/NA Water 0C Page of 0 //0 (Rev. )

114 Lab Chronicle Client: AECOM TestAmerica Job ID: 0-- Project/Site:.Hampstead.EL (MD) SDG: Hanover Pike, Hampstead, MD Client Sample ID: MW- Lab Sample ID: 0-- Date Collected: 0// :00 Date Received: 0// :0 Prep Type Batch Type Batch Method Run Dil Factor or Analyst Total/NA Analysis 0B ml ml 0// 0: PB TAL NSH Initial Amount Final Amount Batch Number Total/NA Analysis 0C ml ml 0// 00: AK TAL NSH Client Sample ID: MW- Lab Sample ID: 0-- Date Collected: 0// :00 Date Received: 0// :0 Prep Type Batch Type Batch Method Run Dil Factor or Analyst Total/NA Analysis 0B ml ml 0// 0: PB TAL NSH Initial Amount Final Amount Batch Number Total/NA Analysis 0C ml ml 0// 00: AK TAL NSH Client Sample ID: MW- Lab Sample ID: 0-- Date Collected: 0// : Date Received: 0// :0 Lab Lab Prep Type Batch Type Batch Method Run Dil Factor or Analyst Total/NA Analysis 0B ml ml 0// 0:0 PB TAL NSH Initial Amount Final Amount Batch Number Total/NA Analysis 0C ml ml 0// 0: AK TAL NSH Lab Client Sample ID: MW- Lab Sample ID: 0-- Date Collected: 0// :0 Date Received: 0// :0 Prep Type Batch Type Batch Method Run Dil Factor or Analyst Total/NA Analysis 0B ml ml 0// 0: PB TAL NSH Initial Amount Final Amount Batch Number Total/NA Analysis 0C ml ml 0// 0:0 AK TAL NSH Lab Client Sample ID: MW- Lab Sample ID: 0-- Date Collected: 0// : Date Received: 0// :0 Prep Type Batch Type Batch Method Run Dil Factor or Analyst Total/NA Analysis 0B ml ml 0// 0: PB TAL NSH Initial Amount Final Amount Batch Number Total/NA Analysis 0C ml ml 0// 0: AK TAL NSH Lab Client Sample ID: MW- Lab Sample ID: 0-- Date Collected: 0// :0 Date Received: 0// :0 Prep Type Batch Type Batch Method Run Dil Factor or Analyst Total/NA Analysis 0B ml ml 0// 0: PB TAL NSH Initial Amount Final Amount Batch Number Lab Page of 0 //0 (Rev. )

115 Lab Chronicle Client: AECOM TestAmerica Job ID: 0-- Project/Site:.Hampstead.EL (MD) SDG: Hanover Pike, Hampstead, MD Client Sample ID: MW- Lab Sample ID: 0-- Date Collected: 0// :0 Date Received: 0// :0 Prep Type Batch Type Batch Method Run Dil Factor or Analyst Total/NA Analysis 0C ml ml 0// 0: AK TAL NSH Initial Amount Final Amount Batch Number Client Sample ID: MW- Lab Sample ID: 0-- Date Collected: 0// :00 Date Received: 0// :0 Prep Type Batch Type Batch Method Run Dil Factor or Analyst Total/NA Analysis 0B ml ml 0// 0:0 PB TAL NSH Initial Amount Final Amount Batch Number Total/NA Analysis 0C ml ml 0// 0:0 AK TAL NSH Client Sample ID: MW- Lab Sample ID: 0-- Date Collected: 0// : Date Received: 0// :0 Lab Lab Prep Type Batch Type Batch Method Run Dil Factor or Analyst Total/NA Analysis 0B ml ml 0// 0: PB TAL NSH Initial Amount Final Amount Batch Number Total/NA Analysis 0C ml ml 0// 0: AK TAL NSH Lab Client Sample ID: MW- Lab Sample ID: 0-- Date Collected: 0// :0 Date Received: 0// :0 Prep Type Batch Type Batch Method Run Dil Factor or Analyst Total/NA Analysis 0B ml ml 0// 0: PB TAL NSH Initial Amount Final Amount Batch Number Total/NA Analysis 0C ml ml 0// 0:0 AK TAL NSH Lab Client Sample ID: MW- Lab Sample ID: 0-- Date Collected: 0// : Date Received: 0// :0 Prep Type Batch Type Batch Method Run Dil Factor or Analyst Total/NA Analysis 0B ml ml 0// 0:0 PB TAL NSH Initial Amount Final Amount Batch Number Total/NA Analysis 0C ml ml 0// 0: AK TAL NSH Lab Client Sample ID: - Potable (P.O.U.) Lab Sample ID: 0-- Date Collected: 0// :0 Date Received: 0// :0 Prep Type Batch Type Batch Method Run Dil Factor or Analyst Total/NA Analysis. ml ml 0// 0: RP TAL NSH Initial Amount Final Amount Batch Number Lab Page of 0 //0 (Rev. )

116 Lab Chronicle Client: AECOM TestAmerica Job ID: 0-- Project/Site:.Hampstead.EL (MD) SDG: Hanover Pike, Hampstead, MD Laboratory References: TAL NSH =, 0 Foster Creighton Drive, Nashville, TN 0, TEL ()-0 Page of 0 //0 (Rev. )

117 Client: AECOM Project/Site:.Hampstead.EL (MD) Method Summary TestAmerica Job ID: 0-- SDG: Hanover Pike, Hampstead, MD Method Method Description Protocol Laboratory. Volatile Organic Compounds (GC/MS) EPA-DW TAL NSH 0B Volatile Organic Compounds (GC/MS) SW TAL NSH 0C Nonhalogenated Organics using GC/FID -Modified (Gasoline Range Organics) SW TAL NSH 00B Purge and Trap SW TAL NSH Protocol References: EPA-DW = "Methods For The Determination Of Organic Compounds In Drinking Water", EPA/00/-/0, December And Its Supplements. SW = "Test Methods For Evaluating Solid Waste, Physical/Chemical Methods", Third Edition, November And Its Updates. Laboratory References: TAL NSH =, 0 Foster Creighton Drive, Nashville, TN 0, TEL ()-0 Page of 0 //0 (Rev. )

118 Accreditation/Certification Summary Client: AECOM TestAmerica Job ID: 0-- Project/Site:.Hampstead.EL (MD) SDG: Hanover Pike, Hampstead, MD Laboratory: Unless otherwise noted, all analytes for this laboratory were covered under each accreditation/certification below. Authority Program EPA Region Identification Number Expiration Date Maryland State Program 0-- 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. Water,,,-Tetrachloroethane. Water,,,-Tetrachloroethane. Water,-Dichloroethane. Water,-Dichloropropene. Water,,-Trichlorobenzene. Water,,-Trichloropropane. Water,,-Trimethylbenzene. Water,-Dibromo--Chloropropane. Water,-Dibromoethane (EDB). Water,,-Trimethylbenzene. Water,-Dichlorobenzene. Water,-Dichloropropane. Water,-Dichloropropane. Water -Chlorotoluene. Water -Chlorotoluene. Water Bromobenzene. Water Bromochloromethane. Water Bromomethane. Water Carbon disulfide. Water Chloroethane. Water Chloromethane. Water cis-,-dichloropropene. Water Dibromomethane. Water Dichlorodifluoromethane. Water Diisopropyl ether. Water Ethyl tert-butyl ether. Water Hexachlorobutadiene. Water Isopropylbenzene. Water Methyl tert-butyl ether. Water Naphthalene. Water n-butylbenzene. Water N-Propylbenzene. Water p-isopropyltoluene. Water sec-butylbenzene. Water Tert-amyl methyl ether. Water tert-butyl alcohol. Water tert-butylbenzene. Water trans-,-dichloropropene. Water Trichlorofluoromethane 0C Water Gasoline Range Organics [C - C] 0B Water,,-Trichloroethane 0B Water,,,-Tetrachloroethane 0B Water,,-Trichloroethane 0B Water,-Dichloroethane 0B Water,-Dichloroethene Page of 0 //0 (Rev. )

119 Accreditation/Certification Summary Client: AECOM TestAmerica Job ID: 0-- Project/Site:.Hampstead.EL (MD) SDG: Hanover Pike, Hampstead, MD Laboratory: (Continued) Unless otherwise noted, all analytes for this laboratory were covered under each accreditation/certification below. Authority Program EPA Region Identification Number Expiration Date Maryland State Program 0-- 0B Water,,-Trichlorobenzene 0B Water,,-Trichlorobenzene 0B Water,-Dibromo--Chloropropane 0B Water,-Dibromoethane (EDB) 0B Water,-Dichlorobenzene 0B Water,-Dichloroethane 0B Water,-Dichloropropane 0B Water,-Dichlorobenzene 0B Water,-Dichlorobenzene 0B Water -Butanone (MEK) 0B Water -Hexanone 0B Water -Methyl--pentanone (MIBK) 0B Water Acetone 0B Water Benzene 0B Water Bromochloromethane 0B Water Bromodichloromethane 0B Water Bromoform 0B Water Bromomethane 0B Water Carbon disulfide 0B Water Carbon tetrachloride 0B Water Chlorobenzene 0B Water Chlorodibromomethane 0B Water Chloroethane 0B Water Chloroform 0B Water Chloromethane 0B Water cis-,-dichloroethene 0B Water cis-,-dichloropropene 0B Water Cyclohexane 0B Water Dichlorodifluoromethane 0B Water Diisopropyl ether 0B Water Ethyl tert-butyl ether 0B Water Ethylbenzene 0B Water Freon 0B Water Isopropylbenzene 0B Water m,p-xylene 0B Water Methyl acetate 0B Water Methyl tert-butyl ether 0B Water Methylcyclohexane 0B Water Methylene Chloride 0B Water Naphthalene 0B Water o-xylene 0B Water Styrene 0B Water Tert-amyl methyl ether 0B Water tert-butyl alcohol (TBA) 0B Water Tetrachloroethene 0B Water Toluene 0B Water trans-,-dichloroethene 0B Water trans-,-dichloropropene 0B Water Trichloroethene Page of 0 //0 (Rev. )

120 Accreditation/Certification Summary Client: AECOM TestAmerica Job ID: 0-- Project/Site:.Hampstead.EL (MD) SDG: Hanover Pike, Hampstead, MD Laboratory: (Continued) Unless otherwise noted, all analytes for this laboratory were covered under each accreditation/certification below. Authority Program EPA Region Identification Number Expiration Date Maryland State Program 0-- 0B Water Trichlorofluoromethane 0B Water Vinyl chloride 0B Water Xylenes, Total Page of 0 //0 (Rev. )

121 Page of 0 //0 (Rev. )

122 Page 0 of 0 //0 (Rev. )

123 ATTACHMENT B MTBE Concentration Graphs Over Time

124 0 MW- Dissolved MTBE Concentration Since System Start-up 0 October, 0 Remediation system start-up August, 0 Deactivated remediation system MTBE Concentration October, 0 Reactivated remediation system February, 0 Pulsing in MW- & MW- initiated 0 0 //0 //0 //0 /0/0 //0 //0 //0 //0 MW- and MW- Deactivated MW- and MW- Reactivated Automated Pulsing in MW- and MW- Initiated MTBE System Deactivated and Began Rebound Assessment Date

125 ,000,000,000 MW- Dissolved MTBE Concentration Since System Start-up October, 0 Remediation system start-up August, 0 Deactivated remediation system MTBE Concentration,000,000,000,000,000 October, 0 Reactivated remediation system February, 0 Pulsing in MW- & MW- initiated,000,000 0 //0 //0 //0 //0 //0 //0 /0/0 //0 MW- and MW- Deactivated Date MW- and MW- Reactivated Automated Pulsing in MW- and MW- Initiated MTBE System Deactivated and Began Rebound Assessment

126 ,00,00 MW- Dissolved MTBE Concentration Since System Start-up August, 0 Deactivated remediation system MTBE Concentration, October, 0 Remediation system start-up * MW- pumping October, 0 Reactivated remediation system * MW- pumping February, 0 Pulsing in MW- & MW- initiated //0 //0 //0 //0 //0 //0 //0 MW- and MW- Deactivated MW- and MW- Reactivated Automated Pulsing in MW- and MW- Initiated MTBE System Deactivated and Began Date

127 ,000,00 MW- Dissolved MTBE Concentration Since System Start-up October, 0 Remediation system * MW- pumping MTBE Concentration,000,00,000,00,000 August, 0 Deactivated remediation system October, 0 Reactivated remediation system * MW- pumping February, 0 Pulsing in MW- & MW- initiated 00 0 //0 //0 //0 //0 //0 //0 MW- and MW- Deactivated Date MW- and MW- Reactivated Automated Pulsing in MW- and MW- Initiated MTBE System Deactivated and Began Rebound Assessment

128 MTBE Concentration MW- Dissolved MTBE Concentration Since System Start-up October, 0 Remediation system start-up * MW- pumping August, 0 Deactivated remediation system October, 0 Reactivated remediation system * MW- pumping February, 0 Pulsing in MW- & MW- initiated 0 //0 //0 //0 //0 //0 //0 MW- and MW- Deactivated Date MW- and MW- Reactivated Automated Pulsing in MW- and MW- Initiated MTBE System Deactivated and Began Rebound Assessment

129 00 MW- Dissolved MTBE Concentration Since Start of System Pulsing 0 00 MTBE Concentration //0 //0 //0 /0/0 //0 //0 //0 //0 //0 //0 //0 MW- and MW- Deactivated MW- and MW- Reactivated Automated Pulsing in MW- and MW- Initiated MTBE System Deactivated and Began Rebound Assessment Date

130 MW- Dissolved MTBE Concentration Since Start of System Pulsing,00,00 MTBE Concentration, //0 //0 //0 /0/0 //0 //0 //0 //0 //0 //0 //0 Date MW- and MW- Deactivated MW- and MW- Reactivated Automated Pulsing in MW- and MW- Initiated MTBE System Deactivated and Began Rebound Assessment

131 0 MW- Dissolved MTBE Concentration Since Start of System Pulsing MTBE Concentration //0 //0 //0 /0/0 //0 //0 //0 //0 //0 //0 //0 MW- and MW- Deactivated MW- and MW- Reactivated Automated Pulsing in MW- and MW- Initiated MTBE System Deactivated and Began Rebound Assessment Date

132 ATTACHMENT C Residential Treatment Potable Well Laboratory Reports

133 ANALYTICAL REPORT TestAmerica Laboratories, Inc. 0 Foster Creighton Drive Nashville, TN 0 Tel: ()-0 TestAmerica Job ID: 0-- TestAmerica SDG: Hanover Pike, Hampstead, MD Client Project/Site:.Hampstead.EL (MD) For: AECOM 000 Virginia Manor Road Suite Beltsville, Maryland 00 Attn: Mr. John Canzeri Authorized for release by: //0 :: AM Leah Klingensmith, Senior Project Manager ()0-0 leah.klingensmith@testamericainc.com Designee for Jennifer Huckaba, Project Manager II ()0-0 jennifer.huckaba@testamericainc.com The test results in this report meet all 00 NELAC and 00 TNI requirements for accredited parameters, 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 Manager at the address or telephone number listed on this page. This report has been electronically signed and authorized by the signatory. Electronic signature is intended 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.

134 Client: AECOM Project/Site:.Hampstead.EL (MD) Table of Contents TestAmerica Job ID: 0-- SDG: Hanover Pike, Hampstead, MD Cover Page Table of Contents Sample Summary Case Narrative Definitions Client Sample Results QC Sample Results QC Association Chronicle Method Summary Certification Summary Chain of Custody Page of //0

135 Sample Summary Client: AECOM TestAmerica Job ID: 0-- Project/Site:.Hampstead.EL (MD) SDG: Hanover Pike, Hampstead, MD Lab Sample ID Client Sample ID Matrix Collected Received 0-- Hanover INF Water 0// :0 0// :0 0-- Hanover GAC- EFF Water 0// : 0// :0 0-- Hanover GAC- EFF Water 0// : 0// :0 0-- Hanover FINAL EFF Water 0// :0 0// :0 Page of //0

136 Case Narrative Client: AECOM TestAmerica Job ID: 0-- Project/Site:.Hampstead.EL (MD) SDG: Hanover Pike, Hampstead, MD Job ID: 0-- Laboratory: Narrative Comments No additional comments. Job Narrative 0-- Receipt The samples were received on //0 :0 AM; the samples arrived in good condition, properly preserved and, where required, on ice. The temperature of the cooler at receipt was.º C. GC/MS VOA No analytical or quality issues were noted, other than those described in the Definitions/Glossary page. Page of //0

137 Definitions/Glossary Client: AECOM TestAmerica Job ID: 0-- Project/Site:.Hampstead.EL (MD) SDG: Hanover Pike, Hampstead, MD Qualifiers GC/MS VOA Qualifier J Glossary Abbreviation Qualifier Description Result is less than the RL but greater than or equal to the MDL and the concentration is an approximate value. 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 %R Percent Recovery CFL Contains Free Liquid CNF Contains No Free Liquid DER Duplicate Error Ratio (normalized absolute difference) 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 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) Page of //0

138 Client: AECOM Project/Site:.Hampstead.EL (MD) Client Sample ID: Hanover INF Date Collected: 0// :0 Date Received: 0// :0 Method:. - Volatile Organic Compounds (GC/MS) Client Sample Results RL MDL TestAmerica Job ID: 0-- SDG: Hanover Pike, Hampstead, MD Lab Sample ID: 0-- Benzene 0.00 ug/l 0// : Bromobenzene Bromochloromethane Bromodichloromethane Bromoform Bromomethane Carbon disulfide Carbon tetrachloride Chlorobenzene Chlorodibromomethane Chloroethane Chloroform Chloromethane -Chlorotoluene -Chlorotoluene cis-,-dichloroethene cis-,-dichloropropene,-dibromo--chloropropane,-dibromoethane (EDB) Dibromomethane,-Dichlorobenzene,-Dichlorobenzene,-Dichlorobenzene Dichlorodifluoromethane,-Dichloroethane,-Dichloroethane,-Dichloroethene,-Dichloropropane,-Dichloropropane,-Dichloropropane,-Dichloropropene Diisopropyl ether Ethylbenzene Ethyl tert-butyl ether Hexachlorobutadiene Isopropylbenzene Methylene Chloride Methyl tert-butyl ether Naphthalene n-butylbenzene N-Propylbenzene p-isopropyltoluene sec-butylbenzene Styrene Tert-amyl methyl ether tert-butyl alcohol tert-butylbenzene,,,-tetrachloroethane,,,-tetrachloroethane Unit D 0.00 ug/l 0// : 0.00 ug/l 0// : 0.00 ug/l 0// : 0.00 ug/l 0// : 0.00 ug/l 0// : 0.00 ug/l 0// : 0.00 ug/l 0// : 0.00 ug/l 0// : 0.00 ug/l 0// : 0.00 ug/l 0// : 0.00 ug/l 0// : 0.00 ug/l 0// : 0.00 ug/l 0// : 0.00 ug/l 0// : 0.00 ug/l 0// : 0.00 ug/l 0// :.00 ug/l 0// : 0.00 ug/l 0// : 0.00 ug/l 0// : 0.00 ug/l 0// : 0.00 ug/l 0// : 0.00 ug/l 0// : 0.00 ug/l 0// : 0.00 ug/l 0// : 0.00 ug/l 0// : 0.00 ug/l 0// : 0.00 ug/l 0// : 0.00 ug/l 0// : 0.00 ug/l 0// : 0.00 ug/l 0// : 0.00 ug/l 0// : 0.00 ug/l 0// : 0.00 ug/l 0// : 0.00 ug/l 0// : 0.00 ug/l 0// :.00 ug/l 0// : 0.00 ug/l 0// :.00 ug/l 0// : 0.00 ug/l 0// : 0.00 ug/l 0// : 0.00 ug/l 0// : 0.00 ug/l 0// : 0.00 ug/l 0// : 0.00 ug/l 0// :.0 ug/l 0// : 0.00 ug/l 0// : 0.00 ug/l 0// : 0.00 ug/l 0// : Page of //0

139 Client: AECOM Project/Site:.Hampstead.EL (MD) Client Sample ID: Hanover INF Date Collected: 0// :0 Date Received: 0// :0 Client Sample Results Method:. - Volatile Organic Compounds (GC/MS) (Continued) RL MDL Unit TestAmerica Job ID: 0-- SDG: Hanover Pike, Hampstead, MD Lab Sample ID: 0-- Tetrachloroethene 0.00 ug/l 0// : Toluene trans-,-dichloroethene trans-,-dichloropropene,,-trichlorobenzene,,-trichlorobenzene,,-trichloroethane,,-trichloroethane Trichloroethene Trichlorofluoromethane,,-Trichloropropane,,-Trimethylbenzene,,-Trimethylbenzene Vinyl chloride Xylenes, Total D 0.00 ug/l 0// : 0.00 ug/l 0// : 0.00 ug/l 0// : 0.00 ug/l 0// : 0.00 ug/l 0// : 0.00 ug/l 0// : 0.00 ug/l 0// : 0.00 ug/l 0// : 0.00 ug/l 0// : 0.00 ug/l 0// : 0.00 ug/l 0// : 0.00 ug/l 0// : 0.00 ug/l 0// :.00 ug/l 0// : Surrogate %Recovery Qualifier -Bromofluorobenzene (Surr) // : Dibromofluoromethane (Surr) 0-0 0// :,-Dichloroethane-d (Surr) // : Toluene-d (Surr) 0-0 0// : Page of //0

140 Client: AECOM Project/Site:.Hampstead.EL (MD) Client Sample ID: Hanover GAC- EFF Date Collected: 0// : Date Received: 0// :0 Method:. - Volatile Organic Compounds (GC/MS) Client Sample Results RL MDL TestAmerica Job ID: 0-- SDG: Hanover Pike, Hampstead, MD Lab Sample ID: 0-- Benzene 0.00 ug/l 0// : Bromobenzene Bromochloromethane Bromodichloromethane Bromoform Bromomethane Carbon disulfide Carbon tetrachloride Chlorobenzene Chlorodibromomethane Chloroethane Chloroform Chloromethane -Chlorotoluene -Chlorotoluene cis-,-dichloroethene cis-,-dichloropropene,-dibromo--chloropropane,-dibromoethane (EDB) Dibromomethane,-Dichlorobenzene,-Dichlorobenzene,-Dichlorobenzene Dichlorodifluoromethane,-Dichloroethane,-Dichloroethane,-Dichloroethene,-Dichloropropane,-Dichloropropane,-Dichloropropane,-Dichloropropene Diisopropyl ether Ethylbenzene Ethyl tert-butyl ether Hexachlorobutadiene Isopropylbenzene Methylene Chloride Methyl tert-butyl ether. Naphthalene n-butylbenzene N-Propylbenzene p-isopropyltoluene sec-butylbenzene Styrene Tert-amyl methyl ether tert-butyl alcohol tert-butylbenzene,,,-tetrachloroethane,,,-tetrachloroethane Unit D 0.00 ug/l 0// : 0.00 ug/l 0// : 0.00 ug/l 0// : 0.00 ug/l 0// : 0.00 ug/l 0// : 0.00 ug/l 0// : 0.00 ug/l 0// : 0.00 ug/l 0// : 0.00 ug/l 0// : 0.00 ug/l 0// : 0.00 ug/l 0// : 0.00 ug/l 0// : 0.00 ug/l 0// : 0.00 ug/l 0// : 0.00 ug/l 0// : 0.00 ug/l 0// :.00 ug/l 0// : 0.00 ug/l 0// : 0.00 ug/l 0// : 0.00 ug/l 0// : 0.00 ug/l 0// : 0.00 ug/l 0// : 0.00 ug/l 0// : 0.00 ug/l 0// : 0.00 ug/l 0// : 0.00 ug/l 0// : 0.00 ug/l 0// : 0.00 ug/l 0// : 0.00 ug/l 0// : 0.00 ug/l 0// : 0.00 ug/l 0// : 0.00 ug/l 0// : 0.00 ug/l 0// : 0.00 ug/l 0// : 0.00 ug/l 0// :.00 ug/l 0// : 0.00 ug/l 0// :.00 ug/l 0// : 0.00 ug/l 0// : 0.00 ug/l 0// : 0.00 ug/l 0// : 0.00 ug/l 0// : 0.00 ug/l 0// : 0.00 ug/l 0// :.0 ug/l 0// : 0.00 ug/l 0// : 0.00 ug/l 0// : 0.00 ug/l 0// : Page of //0

141 Client: AECOM Project/Site:.Hampstead.EL (MD) Client Sample ID: Hanover GAC- EFF Date Collected: 0// : Date Received: 0// :0 Client Sample Results Method:. - Volatile Organic Compounds (GC/MS) (Continued) RL MDL Unit TestAmerica Job ID: 0-- SDG: Hanover Pike, Hampstead, MD Lab Sample ID: 0-- Tetrachloroethene 0.00 ug/l 0// : Toluene trans-,-dichloroethene trans-,-dichloropropene,,-trichlorobenzene,,-trichlorobenzene,,-trichloroethane,,-trichloroethane Trichloroethene Trichlorofluoromethane,,-Trichloropropane,,-Trimethylbenzene,,-Trimethylbenzene Vinyl chloride Xylenes, Total D 0.00 ug/l 0// : 0.00 ug/l 0// : 0.00 ug/l 0// : 0.00 ug/l 0// : 0.00 ug/l 0// : 0.00 ug/l 0// : 0.00 ug/l 0// : 0.00 ug/l 0// : 0.00 ug/l 0// : 0.00 ug/l 0// : 0.00 ug/l 0// : 0.00 ug/l 0// : 0.00 ug/l 0// :.00 ug/l 0// : Surrogate %Recovery Qualifier -Bromofluorobenzene (Surr) 0-0 0// : Dibromofluoromethane (Surr) 0-0 0// :,-Dichloroethane-d (Surr) 0-0 0// : Toluene-d (Surr) 0-0 0// : Page of //0

142 Client: AECOM Project/Site:.Hampstead.EL (MD) Client Sample ID: Hanover GAC- EFF Date Collected: 0// : Date Received: 0// :0 Method:. - Volatile Organic Compounds (GC/MS) Client Sample Results RL MDL TestAmerica Job ID: 0-- SDG: Hanover Pike, Hampstead, MD Lab Sample ID: 0-- Benzene 0.00 ug/l 0// 0: Bromobenzene Bromochloromethane Bromodichloromethane Bromoform Bromomethane Carbon disulfide Carbon tetrachloride Chlorobenzene Chlorodibromomethane Chloroethane Chloroform Chloromethane -Chlorotoluene -Chlorotoluene cis-,-dichloroethene cis-,-dichloropropene,-dibromo--chloropropane,-dibromoethane (EDB) Dibromomethane,-Dichlorobenzene,-Dichlorobenzene,-Dichlorobenzene Dichlorodifluoromethane,-Dichloroethane,-Dichloroethane,-Dichloroethene,-Dichloropropane,-Dichloropropane,-Dichloropropane,-Dichloropropene Diisopropyl ether Ethylbenzene Ethyl tert-butyl ether Hexachlorobutadiene Isopropylbenzene Methylene Chloride Methyl tert-butyl ether Naphthalene n-butylbenzene N-Propylbenzene p-isopropyltoluene sec-butylbenzene Styrene Tert-amyl methyl ether tert-butyl alcohol tert-butylbenzene,,,-tetrachloroethane,,,-tetrachloroethane Unit D 0.00 ug/l 0// 0: 0.00 ug/l 0// 0: 0.00 ug/l 0// 0: 0.00 ug/l 0// 0: 0.00 ug/l 0// 0: 0.00 ug/l 0// 0: 0.00 ug/l 0// 0: 0.00 ug/l 0// 0: 0.00 ug/l 0// 0: 0.00 ug/l 0// 0: 0.00 ug/l 0// 0: 0.00 ug/l 0// 0: 0.00 ug/l 0// 0: 0.00 ug/l 0// 0: 0.00 ug/l 0// 0: 0.00 ug/l 0// 0:.00 ug/l 0// 0: 0.00 ug/l 0// 0: 0.00 ug/l 0// 0: 0.00 ug/l 0// 0: 0.00 ug/l 0// 0: 0.00 ug/l 0// 0: 0.00 ug/l 0// 0: 0.00 ug/l 0// 0: 0.00 ug/l 0// 0: 0.00 ug/l 0// 0: 0.00 ug/l 0// 0: 0.00 ug/l 0// 0: 0.00 ug/l 0// 0: 0.00 ug/l 0// 0: 0.00 ug/l 0// 0: 0.00 ug/l 0// 0: 0.00 ug/l 0// 0: 0.00 ug/l 0// 0: 0.00 ug/l 0// 0:.00 ug/l 0// 0: 0.00 ug/l 0// 0:.00 ug/l 0// 0: 0.00 ug/l 0// 0: 0.00 ug/l 0// 0: 0.00 ug/l 0// 0: 0.00 ug/l 0// 0: 0.00 ug/l 0// 0: 0.00 ug/l 0// 0:.0 ug/l 0// 0: 0.00 ug/l 0// 0: 0.00 ug/l 0// 0: 0.00 ug/l 0// 0: Page of //0

143 Client: AECOM Project/Site:.Hampstead.EL (MD) Client Sample ID: Hanover GAC- EFF Date Collected: 0// : Date Received: 0// :0 Client Sample Results Method:. - Volatile Organic Compounds (GC/MS) (Continued) RL MDL Unit TestAmerica Job ID: 0-- SDG: Hanover Pike, Hampstead, MD Lab Sample ID: 0-- Tetrachloroethene 0.00 ug/l 0// 0: Toluene trans-,-dichloroethene trans-,-dichloropropene,,-trichlorobenzene,,-trichlorobenzene,,-trichloroethane,,-trichloroethane Trichloroethene Trichlorofluoromethane,,-Trichloropropane,,-Trimethylbenzene,,-Trimethylbenzene Vinyl chloride Xylenes, Total D 0.00 ug/l 0// 0: 0.00 ug/l 0// 0: 0.00 ug/l 0// 0: 0.00 ug/l 0// 0: 0.00 ug/l 0// 0: 0.00 ug/l 0// 0: 0.00 ug/l 0// 0: 0.00 ug/l 0// 0: 0.00 ug/l 0// 0: 0.00 ug/l 0// 0: 0.00 ug/l 0// 0: 0.00 ug/l 0// 0: 0.00 ug/l 0// 0:.00 ug/l 0// 0: Surrogate %Recovery Qualifier -Bromofluorobenzene (Surr) 0-0 0// 0: Dibromofluoromethane (Surr) 0-0 0// 0:,-Dichloroethane-d (Surr) 0-0 0// 0: Toluene-d (Surr) 0-0 0// 0: Page of //0

144 Client: AECOM Project/Site:.Hampstead.EL (MD) Client Sample ID: Hanover FINAL EFF Date Collected: 0// :0 Date Received: 0// :0 Method:. - Volatile Organic Compounds (GC/MS) Client Sample Results RL MDL TestAmerica Job ID: 0-- SDG: Hanover Pike, Hampstead, MD Lab Sample ID: 0-- Benzene 0.00 ug/l 0// 0: Bromobenzene Bromochloromethane Bromodichloromethane Bromoform Bromomethane Carbon disulfide Carbon tetrachloride Chlorobenzene Chlorodibromomethane Chloroethane Chloroform Chloromethane -Chlorotoluene -Chlorotoluene cis-,-dichloroethene cis-,-dichloropropene,-dibromo--chloropropane,-dibromoethane (EDB) Dibromomethane,-Dichlorobenzene,-Dichlorobenzene,-Dichlorobenzene Dichlorodifluoromethane,-Dichloroethane,-Dichloroethane,-Dichloroethene,-Dichloropropane,-Dichloropropane,-Dichloropropane,-Dichloropropene Diisopropyl ether Ethylbenzene Ethyl tert-butyl ether Hexachlorobutadiene Isopropylbenzene Methylene Chloride Methyl tert-butyl ether Naphthalene n-butylbenzene N-Propylbenzene p-isopropyltoluene sec-butylbenzene Styrene Tert-amyl methyl ether tert-butyl alcohol tert-butylbenzene,,,-tetrachloroethane,,,-tetrachloroethane Unit D 0.00 ug/l 0// 0: 0.00 ug/l 0// 0: 0.00 ug/l 0// 0: 0.00 ug/l 0// 0: 0.00 ug/l 0// 0: 0.00 ug/l 0// 0: 0.00 ug/l 0// 0: 0.00 ug/l 0// 0: 0.00 ug/l 0// 0: 0.00 ug/l 0// 0: 0.00 ug/l 0// 0: 0.00 ug/l 0// 0: 0.00 ug/l 0// 0: 0.00 ug/l 0// 0: 0.00 ug/l 0// 0: 0.00 ug/l 0// 0:.00 ug/l 0// 0: 0.00 ug/l 0// 0: 0.00 ug/l 0// 0: 0.00 ug/l 0// 0: 0.00 ug/l 0// 0: 0.00 ug/l 0// 0: 0.00 ug/l 0// 0: 0.00 ug/l 0// 0: 0.00 ug/l 0// 0: 0.00 ug/l 0// 0: 0.00 ug/l 0// 0: 0.00 ug/l 0// 0: 0.00 ug/l 0// 0: 0.00 ug/l 0// 0: 0.00 ug/l 0// 0: 0.00 ug/l 0// 0: 0.00 ug/l 0// 0: 0.00 ug/l 0// 0: 0.00 ug/l 0// 0:.00 ug/l 0// 0: 0.00 ug/l 0// 0:.00 ug/l 0// 0: 0.00 ug/l 0// 0: 0.00 ug/l 0// 0: 0.00 ug/l 0// 0: 0.00 ug/l 0// 0: 0.00 ug/l 0// 0: 0.00 ug/l 0// 0:.0 ug/l 0// 0: 0.00 ug/l 0// 0: 0.00 ug/l 0// 0: 0.00 ug/l 0// 0: Page of //0

145 Client: AECOM Project/Site:.Hampstead.EL (MD) Client Sample ID: Hanover FINAL EFF Date Collected: 0// :0 Date Received: 0// :0 Client Sample Results Method:. - Volatile Organic Compounds (GC/MS) (Continued) RL MDL Unit TestAmerica Job ID: 0-- SDG: Hanover Pike, Hampstead, MD Lab Sample ID: 0-- Tetrachloroethene 0.00 ug/l 0// 0: Toluene trans-,-dichloroethene trans-,-dichloropropene,,-trichlorobenzene,,-trichlorobenzene,,-trichloroethane,,-trichloroethane Trichloroethene Trichlorofluoromethane,,-Trichloropropane,,-Trimethylbenzene,,-Trimethylbenzene Vinyl chloride Xylenes, Total D 0.00 ug/l 0// 0: 0.00 ug/l 0// 0: 0.00 ug/l 0// 0: 0.00 ug/l 0// 0: 0.00 ug/l 0// 0: 0.00 ug/l 0// 0: 0.00 ug/l 0// 0: 0.00 ug/l 0// 0: 0.00 ug/l 0// 0: 0.00 ug/l 0// 0: 0.00 ug/l 0// 0: 0.00 ug/l 0// 0: 0.00 ug/l 0// 0:.00 ug/l 0// 0: Surrogate %Recovery Qualifier -Bromofluorobenzene (Surr) 0-0 0// 0: Dibromofluoromethane (Surr) 0-0 0// 0:,-Dichloroethane-d (Surr) // 0: Toluene-d (Surr) 0-0 0// 0: Page of //0

146 QC Sample Results Client: AECOM TestAmerica Job ID: 0-- Project/Site:.Hampstead.EL (MD) SDG: Hanover Pike, Hampstead, MD Method:. - Volatile Organic Compounds (GC/MS) Lab Sample ID: MB 0-0/ Client Sample ID: Method Blank Prep Type: Total/NA Analysis Batch: 0 MB MB RL MDL Unit D Benzene 0.00 ug/l 0// :0 Bromobenzene 0.00 ug/l 0// :0 Bromochloromethane 0.00 ug/l 0// :0 Bromodichloromethane 0.00 ug/l 0// :0 Bromoform 0.00 ug/l 0// :0 Bromomethane 0.00 ug/l 0// :0 Carbon disulfide 0.00 ug/l 0// :0 Carbon tetrachloride 0.00 ug/l 0// :0 Chlorobenzene 0.00 ug/l 0// :0 Chlorodibromomethane 0.00 ug/l 0// :0 Chloroethane 0.00 ug/l 0// :0 Chloroform 0.00 ug/l 0// :0 Chloromethane 0.00 ug/l 0// :0 -Chlorotoluene 0.00 ug/l 0// :0 -Chlorotoluene 0.00 ug/l 0// :0 cis-,-dichloroethene 0.00 ug/l 0// :0 cis-,-dichloropropene 0.00 ug/l 0// :0,-Dibromo--Chloropropane.00 ug/l 0// :0,-Dibromoethane (EDB) 0.00 ug/l 0// :0 Dibromomethane 0.00 ug/l 0// :0,-Dichlorobenzene 0.00 ug/l 0// :0,-Dichlorobenzene 0.00 ug/l 0// :0,-Dichlorobenzene 0.00 ug/l 0// :0 Dichlorodifluoromethane 0.00 ug/l 0// :0,-Dichloroethane 0.00 ug/l 0// :0,-Dichloroethane 0.00 ug/l 0// :0,-Dichloroethene 0.00 ug/l 0// :0,-Dichloropropane 0.00 ug/l 0// :0,-Dichloropropane 0.00 ug/l 0// :0,-Dichloropropane 0.00 ug/l 0// :0,-Dichloropropene 0.00 ug/l 0// :0 Diisopropyl ether 0.00 ug/l 0// :0 Ethylbenzene 0.00 ug/l 0// :0 Ethyl tert-butyl ether 0.00 ug/l 0// :0 Hexachlorobutadiene 0.00 ug/l 0// :0 Isopropylbenzene 0.00 ug/l 0// :0 Methylene Chloride.00 ug/l 0// :0 Methyl tert-butyl ether 0.00 ug/l 0// :0 Naphthalene.00 ug/l 0// :0 n-butylbenzene 0.00 ug/l 0// :0 N-Propylbenzene 0.00 ug/l 0// :0 p-isopropyltoluene 0.00 ug/l 0// :0 sec-butylbenzene 0.00 ug/l 0// :0 Styrene 0.00 ug/l 0// :0 Tert-amyl methyl ether 0.00 ug/l 0// :0 tert-butyl alcohol.0 ug/l 0// :0 tert-butylbenzene 0.00 ug/l 0// :0,,,-Tetrachloroethane 0.00 ug/l 0// :0 Page of //0

147 QC Sample Results Client: AECOM TestAmerica Job ID: 0-- Project/Site:.Hampstead.EL (MD) SDG: Hanover Pike, Hampstead, MD Method:. - Volatile Organic Compounds (GC/MS) (Continued) Lab Sample ID: MB 0-0/ Client Sample ID: Method Blank Prep Type: Total/NA Analysis Batch: 0 MB MB RL MDL Unit D,,,-Tetrachloroethane 0.00 ug/l 0// :0 Tetrachloroethene 0.00 ug/l 0// :0 Toluene 0.00 ug/l 0// :0 trans-,-dichloroethene 0.00 ug/l 0// :0 trans-,-dichloropropene 0.00 ug/l 0// :0,,-Trichlorobenzene 0.00 ug/l 0// :0,,-Trichlorobenzene 0.00 ug/l 0// :0,,-Trichloroethane 0.00 ug/l 0// :0,,-Trichloroethane 0.00 ug/l 0// :0 Trichloroethene 0.00 ug/l 0// :0 Trichlorofluoromethane 0.00 ug/l 0// :0,,-Trichloropropane 0.00 ug/l 0// :0,,-Trimethylbenzene 0.00 ug/l 0// :0,,-Trimethylbenzene 0.00 ug/l 0// :0 Vinyl chloride 0.00 ug/l 0// :0 Xylenes, Total.00 ug/l 0// :0 Surrogate %Recovery MB MB Qualifier -Bromofluorobenzene (Surr) 0-0 0// :0 Dibromofluoromethane (Surr) 0-0 0// :0,-Dichloroethane-d (Surr) 0-0 0// :0 Toluene-d (Surr) 0-0 0// :0 Lab Sample ID: LCS 0-0/ Analysis Batch: 0 Spike Added LCS LCS Client Sample ID: Lab Control Sample Prep Type: Total/NA Benzene.00. ug/l 0-0 Bromobenzene.00. ug/l 0-0 Bromochloromethane.00.0 ug/l 0-0 Bromodichloromethane ug/l 0-0 Bromoform.00.0 ug/l 0-0 Bromomethane.00. ug/l 0-0 Carbon disulfide.00. ug/l 0-0 Carbon tetrachloride.00.0 ug/l 0-0 Chlorobenzene.00. ug/l 0-0 Chlorodibromomethane.00. ug/l 0-0 Chloroethane.00.0 ug/l Chloroform.00.0 ug/l 0-0 Chloromethane.00. ug/l 0-0 -Chlorotoluene.00. ug/l 0-0 -Chlorotoluene.00. ug/l cis-,-dichloroethene.00. ug/l 0-0 cis-,-dichloropropene.00.0 ug/l 0-0,-Dibromo--Chloropropane.00. ug/l 0-0,-Dibromoethane (EDB).00.0 ug/l 0-0 Dibromomethane.00. ug/l 0-0 Unit D %Rec %Rec. Page of //0

148 QC Sample Results Client: AECOM TestAmerica Job ID: 0-- Project/Site:.Hampstead.EL (MD) SDG: Hanover Pike, Hampstead, MD Method:. - Volatile Organic Compounds (GC/MS) (Continued) Lab Sample ID: LCS 0-0/ Client Sample ID: Lab Control Sample Prep Type: Total/NA Analysis Batch: 0 Spike LCS LCS %Rec. Added Unit D %Rec,-Dichlorobenzene.00. ug/l 0-0,-Dichlorobenzene.00. ug/l 0-0,-Dichlorobenzene.00. ug/l 0-0 Dichlorodifluoromethane.00.0 ug/l 0-0,-Dichloroethane.00. ug/l 0-0,-Dichloroethane.00. ug/l 0-0,-Dichloroethene.00. ug/l 0-0,-Dichloropropane.00. ug/l 0-0,-Dichloropropane.00. ug/l 0-0,-Dichloropropane.00.0 ug/l 0 0-0,-Dichloropropene.00.0 ug/l 0-0 Diisopropyl ether.00. ug/l 0-0 Ethylbenzene.00. ug/l 0-0 Ethyl tert-butyl ether.00. ug/l 0-0 Hexachlorobutadiene.00. ug/l 0-0 Isopropylbenzene.00. ug/l 0-0 Methylene Chloride.00.0 ug/l 0-0 Methyl tert-butyl ether.00. ug/l 0-0 Naphthalene.00. ug/l 0-0 n-butylbenzene.00. ug/l 0-0 N-Propylbenzene.00. ug/l 0-0 p-isopropyltoluene.00. ug/l 0-0 sec-butylbenzene.00. ug/l 0-0 Styrene.00. ug/l 0-0 Tert-amyl methyl ether.00. ug/l 0-0 tert-butyl alcohol ug/l 0-0 tert-butylbenzene.00. ug/l 0-0,,,-Tetrachloroethane.00. ug/l 0-0,,,-Tetrachloroethane.00. ug/l 0-0 Tetrachloroethene.00.0 ug/l 0-0 Toluene.00. ug/l 0-0 trans-,-dichloroethene ug/l trans-,-dichloropropene.00. ug/l 0-0,,-Trichlorobenzene.00. ug/l 0-0,,-Trichlorobenzene.00. ug/l 0-0,,-Trichloroethane.00. ug/l 0-0,,-Trichloroethane.00. ug/l 0-0 Trichloroethene ug/l Trichlorofluoromethane.00. ug/l 0-0,,-Trichloropropane.00.0 ug/l 0-0,,-Trimethylbenzene.00.0 ug/l 0 0-0,,-Trimethylbenzene.00.0 ug/l 0-0 Vinyl chloride.00.0 ug/l Xylenes, Total.0.0 ug/l 0-0 Surrogate %Recovery LCS LCS Qualifier -Bromofluorobenzene (Surr) Dibromofluoromethane (Surr) 0-0 Page of //0

149 Client: AECOM Project/Site:.Hampstead.EL (MD) QC Sample Results Method:. - Volatile Organic Compounds (GC/MS) (Continued) Lab Sample ID: LCS 0-0/ Analysis Batch: 0 Surrogate %Recovery LCS LCS Qualifier,-Dichloroethane-d (Surr) 0-0 Toluene-d (Surr) 0-0 Lab Sample ID: LCSD 0-0/ Analysis Batch: 0 Spike Added LCSD LCSD TestAmerica Job ID: 0-- SDG: Hanover Pike, Hampstead, MD Client Sample ID: Lab Control Sample Prep Type: Total/NA Client Sample ID: Lab Control Sample Dup Prep Type: Total/NA Benzene.00.0 ug/l Bromobenzene.00. ug/l Bromochloromethane.00. ug/l Bromodichloromethane.00. ug/l Bromoform ug/l Bromomethane.00. ug/l Carbon disulfide.00. ug/l Carbon tetrachloride ug/l Chlorobenzene.00.0 ug/l Chlorodibromomethane.00.0 ug/l Chloroethane.00. ug/l Chloroform.00. ug/l Chloromethane.00. ug/l Chlorotoluene.00.0 ug/l Chlorotoluene.00. ug/l cis-,-dichloroethene.00. ug/l cis-,-dichloropropene.00. ug/l 0-0 0,-Dibromo--Chloropropane.00. ug/l ,-Dibromoethane (EDB).00. ug/l Dibromomethane.00. ug/l 0-0 0,-Dichlorobenzene.00. ug/l ,-Dichlorobenzene.00. ug/l 0-0 0,-Dichlorobenzene.00.0 ug/l Dichlorodifluoromethane.00. ug/l 0-0 0,-Dichloroethane.00. ug/l 0-0 0,-Dichloroethane.00.0 ug/l 0-0 0,-Dichloroethene ug/l 0-0 0,-Dichloropropane.00. ug/l 0-0 0,-Dichloropropane.00.0 ug/l 0-0 0,-Dichloropropane.00.0 ug/l ,-Dichloropropene.00. ug/l Diisopropyl ether.00. ug/l Ethylbenzene.00.0 ug/l Ethyl tert-butyl ether.00. ug/l Hexachlorobutadiene.00.0 ug/l Isopropylbenzene.00. ug/l Methylene Chloride.00.0 J ug/l Methyl tert-butyl ether.00.0 ug/l Naphthalene.00. ug/l n-butylbenzene.00.0 ug/l Unit D %Rec %Rec. RPD RPD Limit Page of //0

150 QC Sample Results Client: AECOM TestAmerica Job ID: 0-- Project/Site:.Hampstead.EL (MD) SDG: Hanover Pike, Hampstead, MD Method:. - Volatile Organic Compounds (GC/MS) (Continued) Lab Sample ID: LCSD 0-0/ Client Sample ID: Lab Control Sample Dup Prep Type: Total/NA Analysis Batch: 0 Spike LCSD LCSD %Rec. RPD Added Unit D %Rec RPD Limit N-Propylbenzene.00.0 ug/l p-isopropyltoluene.00.0 ug/l sec-butylbenzene.00. ug/l Styrene.00. ug/l Tert-amyl methyl ether.00. ug/l tert-butyl alcohol ug/l tert-butylbenzene.00.0 ug/l 0-0 0,,,-Tetrachloroethane.00. ug/l 0-0 0,,,-Tetrachloroethane ug/l Tetrachloroethene.00. ug/l Toluene.00.0 ug/l trans-,-dichloroethene.00. ug/l trans-,-dichloropropene.00. ug/l 0-0 0,,-Trichlorobenzene.00. ug/l 0-0 0,,-Trichlorobenzene.00. ug/l ,,-Trichloroethane.00. ug/l 0-0 0,,-Trichloroethane.00.0 ug/l Trichloroethene.00. ug/l Trichlorofluoromethane.00. ug/l 0-0 0,,-Trichloropropane.00. ug/l 0-0 0,,-Trimethylbenzene ug/l ,,-Trimethylbenzene.00.0 ug/l Vinyl chloride.00. ug/l Xylenes, Total.0.0 ug/l Surrogate LCSD LCSD %Recovery Qualifier -Bromofluorobenzene (Surr) 0-0 Dibromofluoromethane (Surr) 0-0,-Dichloroethane-d (Surr) 0-0 Toluene-d (Surr) 0-0 Page of //0

151 Client: AECOM Project/Site:.Hampstead.EL (MD) GC/MS VOA Analysis Batch: 0 QC Association Summary TestAmerica Job ID: 0-- SDG: Hanover Pike, Hampstead, MD Lab Sample ID Client Sample ID Prep Type Matrix Method Prep Batch 0-- Hanover INF Total/NA Water. 0-- Hanover GAC- EFF Total/NA 0-- Hanover GAC- EFF Total/NA 0-- Hanover FINAL EFF Total/NA MB 0-0/ Method Blank Total/NA LCS 0-0/ Lab Control Sample Total/NA LCSD 0-0/ Lab Control Sample Dup Total/NA Water. Water. Water. Water. Water. Water. Page of //0

152 Lab Chronicle Client: AECOM TestAmerica Job ID: 0-- Project/Site:.Hampstead.EL (MD) SDG: Hanover Pike, Hampstead, MD Client Sample ID: Hanover INF Lab Sample ID: 0-- Date Collected: 0// :0 Date Received: 0// :0 Prep Type Batch Type Batch Method Run Dil Factor or Analyst Total/NA Analysis. ml ml 0 0// : JJR TAL NSH Initial Amount Final Amount Batch Number Client Sample ID: Hanover GAC- EFF Lab Sample ID: 0-- Date Collected: 0// : Date Received: 0// :0 Prep Type Batch Type Batch Method Run Dil Factor or Analyst Total/NA Analysis. ml ml 0 0// : JJR TAL NSH Initial Amount Final Amount Batch Number Client Sample ID: Hanover GAC- EFF Lab Sample ID: 0-- Date Collected: 0// : Date Received: 0// :0 Prep Type Batch Type Batch Method Run Dil Factor or Analyst Total/NA Analysis. ml ml 0 0// 0: JJR TAL NSH Initial Amount Final Amount Batch Number Lab Lab Lab Client Sample ID: Hanover FINAL EFF Lab Sample ID: 0-- Date Collected: 0// :0 Date Received: 0// :0 Prep Type Batch Type Batch Method Run Dil Factor or Analyst Total/NA Analysis. ml ml 0 0// 0: JJR TAL NSH Initial Amount Final Amount Batch Number Lab Laboratory References: TAL NSH =, 0 Foster Creighton Drive, Nashville, TN 0, TEL ()-0 Page 0 of //0

153 Method Summary Client: AECOM TestAmerica Job ID: 0-- Project/Site:.Hampstead.EL (MD) SDG: Hanover Pike, Hampstead, MD Method Method Description Protocol Laboratory. Volatile Organic Compounds (GC/MS) EPA-DW TAL NSH Protocol References: EPA-DW = "Methods For The Determination Of Organic Compounds In Drinking Water", EPA/00/-/0, December And Its Supplements. Laboratory References: TAL NSH =, 0 Foster Creighton Drive, Nashville, TN 0, TEL ()-0 Page of //0

154 Accreditation/Certification Summary Client: AECOM TestAmerica Job ID: 0-- Project/Site:.Hampstead.EL (MD) SDG: Hanover Pike, Hampstead, MD Laboratory: The accreditations/certifications listed below are applicable to this report. Authority Program EPA Region Identification Number Expiration Date Maryland State Program 0-- Page of //0

155 Page of //0

156 Page of //0

157 ANALYTICAL REPORT TestAmerica Laboratories, Inc. 0 Foster Creighton Drive Nashville, TN 0 Tel: ()-0 TestAmerica Job ID: 0-- Client Project/Site:.Hampstead.EL (MD) For: AECOM 000 Virginia Manor Road Suite Beltsville, Maryland 00 Attn: Ms. Sharon Drummond Authorized for release by: //0 :: AM Leah Klingensmith, Senior Project Manager ()0-0 leah.klingensmith@testamericainc.com Designee for Jennifer Huckaba, Project Manager II ()0-0 jennifer.huckaba@testamericainc.com The test results in this report meet all 00 NELAC and 00 TNI requirements for accredited parameters, 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 Manager at the address or telephone number listed on this page. This report has been electronically signed and authorized by the signatory. Electronic signature is intended 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.

158 Client: AECOM Project/Site:.Hampstead.EL (MD) Table of Contents TestAmerica Job ID: 0-- Cover Page Table of Contents Sample Summary Case Narrative Definitions Client Sample Results QC Sample Results QC Association Chronicle Method Summary Certification Summary Chain of Custody Page of //0

159 Client: AECOM Project/Site:.Hampstead.EL (MD) Sample Summary TestAmerica Job ID: 0-- Lab Sample ID Client Sample ID Matrix Collected Received 0-- Phillips Water 0// : 0// 0: Page of //0

160 Case Narrative Client: AECOM TestAmerica Job ID: 0-- Project/Site:.Hampstead.EL (MD) Job ID: 0-- Laboratory: Narrative Comments No additional comments. Job Narrative 0-- Receipt The sample was received on //0 : AM; the sample arrived in good condition, properly preserved and, where required, on ice. The temperature of the cooler at receipt was.º C. GC/MS VOA Method(s).: The laboratory control sample (LCS) for analytical batch 0-0 recovered outside control limits for the following analytes: Bromomethane. These analytes were biased high in the LCS and were not detected in the associated samples; therefore, the data have been reported. Method(s).: The laboratory control sample duplicate (LCSD) for analytical batch 0-0 recovered outside control limits for the following analytes:,-dichloroethene,,-dichloropropane, Bromomethane and cis-,-dichloroethene. These analytes were biased high in the LCSD and were not detected in the associated samples; therefore, the data have been reported. Method(s).: The method blank for analytical batch 0-0 contained,,-trichlorobenzene above the reporting limit (RL). None of the samples associated with this method blank contained the target compound; therefore, re-extraction and/or re-analysis of samples were not performed. No additional analytical or quality issues were noted, other than those described above or in the Definitions/Glossary page. Page of //0

161 Client: AECOM Project/Site:.Hampstead.EL (MD) Definitions/Glossary TestAmerica Job ID: 0-- Qualifiers GC/MS VOA Qualifier Qualifier Description * LCS or LCSD is outside acceptance limits. Glossary Abbreviation 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 %R Percent Recovery CFL Contains Free Liquid CNF Contains No Free Liquid DER Duplicate Error Ratio (normalized absolute difference) 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 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) Page of //0

162 Client: AECOM Project/Site:.Hampstead.EL (MD) Client Sample ID: Phillips Date Collected: 0// : Date Received: 0// 0: Method:. - Volatile Organic Compounds (GC/MS) Client Sample Results RL MDL TestAmerica Job ID: 0-- Lab Sample ID: 0-- Benzene 0.00 ug/l 0// : Bromobenzene Bromochloromethane Bromodichloromethane Bromoform Bromomethane * Carbon disulfide Carbon tetrachloride Chlorobenzene Chlorodibromomethane Chloroethane Chloroform Chloromethane -Chlorotoluene -Chlorotoluene cis-,-dichloroethene * cis-,-dichloropropene,-dibromo--chloropropane,-dibromoethane (EDB) Dibromomethane,-Dichlorobenzene,-Dichlorobenzene,-Dichlorobenzene Dichlorodifluoromethane,-Dichloroethane,-Dichloroethane,-Dichloroethene *,-Dichloropropane,-Dichloropropane,-Dichloropropane *,-Dichloropropene Diisopropyl ether Ethylbenzene Ethyl tert-butyl ether Hexachlorobutadiene Isopropylbenzene Methylene Chloride Methyl tert-butyl ether Naphthalene n-butylbenzene N-Propylbenzene p-isopropyltoluene sec-butylbenzene Styrene Tert-amyl methyl ether tert-butyl alcohol tert-butylbenzene,,,-tetrachloroethane,,,-tetrachloroethane Unit D 0.00 ug/l 0// : 0.00 ug/l 0// : 0.00 ug/l 0// : 0.00 ug/l 0// : 0.00 ug/l 0// : 0.00 ug/l 0// : 0.00 ug/l 0// : 0.00 ug/l 0// : 0.00 ug/l 0// : 0.00 ug/l 0// : 0.00 ug/l 0// : 0.00 ug/l 0// : 0.00 ug/l 0// : 0.00 ug/l 0// : 0.00 ug/l 0// : 0.00 ug/l 0// :.00 ug/l 0// : 0.00 ug/l 0// : 0.00 ug/l 0// : 0.00 ug/l 0// : 0.00 ug/l 0// : 0.00 ug/l 0// : 0.00 ug/l 0// : 0.00 ug/l 0// : 0.00 ug/l 0// : 0.00 ug/l 0// : 0.00 ug/l 0// : 0.00 ug/l 0// : 0.00 ug/l 0// : 0.00 ug/l 0// : 0.00 ug/l 0// : 0.00 ug/l 0// : 0.00 ug/l 0// : 0.00 ug/l 0// : 0.00 ug/l 0// :.00 ug/l 0// : 0.00 ug/l 0// :.00 ug/l 0// : 0.00 ug/l 0// : 0.00 ug/l 0// : 0.00 ug/l 0// : 0.00 ug/l 0// : 0.00 ug/l 0// : 0.00 ug/l 0// :.0 ug/l 0// : 0.00 ug/l 0// : 0.00 ug/l 0// : 0.00 ug/l 0// : Page of //0

163 Client: AECOM Project/Site:.Hampstead.EL (MD) Client Sample ID: Phillips Date Collected: 0// : Date Received: 0// 0: Client Sample Results Method:. - Volatile Organic Compounds (GC/MS) (Continued) RL MDL Unit TestAmerica Job ID: 0-- Lab Sample ID: 0-- Tetrachloroethene 0.00 ug/l 0// : Toluene trans-,-dichloroethene trans-,-dichloropropene,,-trichlorobenzene,,-trichlorobenzene,,-trichloroethane,,-trichloroethane Trichloroethene Trichlorofluoromethane,,-Trichloropropane,,-Trimethylbenzene,,-Trimethylbenzene Vinyl chloride Xylenes, Total D 0.00 ug/l 0// : 0.00 ug/l 0// : 0.00 ug/l 0// : 0.00 ug/l 0// : 0.00 ug/l 0// : 0.00 ug/l 0// : 0.00 ug/l 0// : 0.00 ug/l 0// : 0.00 ug/l 0// : 0.00 ug/l 0// : 0.00 ug/l 0// : 0.00 ug/l 0// : 0.00 ug/l 0// :.00 ug/l 0// : Surrogate %Recovery Qualifier -Bromofluorobenzene (Surr) 0-0 0// : Dibromofluoromethane (Surr) 0-0 0// :,-Dichloroethane-d (Surr) // : Toluene-d (Surr) 0-0 0// : Page of //0

164 Client: AECOM Project/Site:.Hampstead.EL (MD) QC Sample Results Method:. - Volatile Organic Compounds (GC/MS) Lab Sample ID: MB 0-0/ Analysis Batch: 0 MB MB RL MDL TestAmerica Job ID: 0-- Client Sample ID: Method Blank Prep Type: Total/NA Benzene 0.00 ug/l 0// :0 Bromobenzene Bromochloromethane Bromodichloromethane Bromoform Bromomethane Carbon disulfide Carbon tetrachloride Chlorobenzene Chlorodibromomethane Chloroethane Chloroform Chloromethane -Chlorotoluene -Chlorotoluene cis-,-dichloroethene cis-,-dichloropropene,-dibromo--chloropropane,-dibromoethane (EDB) Dibromomethane,-Dichlorobenzene,-Dichlorobenzene,-Dichlorobenzene Dichlorodifluoromethane,-Dichloroethane,-Dichloroethane,-Dichloroethene,-Dichloropropane,-Dichloropropane,-Dichloropropane,-Dichloropropene Diisopropyl ether Ethylbenzene Ethyl tert-butyl ether Hexachlorobutadiene Isopropylbenzene Methylene Chloride Methyl tert-butyl ether Naphthalene n-butylbenzene N-Propylbenzene p-isopropyltoluene sec-butylbenzene Styrene Tert-amyl methyl ether tert-butyl alcohol tert-butylbenzene,,,-tetrachloroethane Unit D 0.00 ug/l 0// : ug/l 0// : ug/l 0// : ug/l 0// : ug/l 0// : ug/l 0// : ug/l 0// : ug/l 0// : ug/l 0// : ug/l 0// : ug/l 0// : ug/l 0// : ug/l 0// : ug/l 0// : ug/l 0// : ug/l 0// :0.00 ug/l 0// : ug/l 0// : ug/l 0// : ug/l 0// : ug/l 0// : ug/l 0// : ug/l 0// : ug/l 0// : ug/l 0// : ug/l 0// : ug/l 0// : ug/l 0// : ug/l 0// : ug/l 0// : ug/l 0// : ug/l 0// : ug/l 0// : ug/l 0// : ug/l 0// :0.00 ug/l 0// : ug/l 0// :0.00 ug/l 0// : ug/l 0// : ug/l 0// : ug/l 0// : ug/l 0// : ug/l 0// : ug/l 0// :0.0 ug/l 0// : ug/l 0// : ug/l 0// :0 Page of //0

165 Client: AECOM Project/Site:.Hampstead.EL (MD) QC Sample Results Method:. - Volatile Organic Compounds (GC/MS) (Continued) Lab Sample ID: MB 0-0/ Analysis Batch: 0 MB MB RL MDL TestAmerica Job ID: 0-- Client Sample ID: Method Blank Prep Type: Total/NA,,,-Tetrachloroethane 0.00 ug/l 0// :0 Tetrachloroethene Toluene trans-,-dichloroethene trans-,-dichloropropene,,-trichlorobenzene,,-trichlorobenzene,,-trichloroethane,,-trichloroethane Trichloroethene Trichlorofluoromethane,,-Trichloropropane,,-Trimethylbenzene,,-Trimethylbenzene Vinyl chloride Xylenes, Total Unit D 0.00 ug/l 0// : ug/l 0// : ug/l 0// : ug/l 0// : ug/l 0// : ug/l 0// : ug/l 0// : ug/l 0// : ug/l 0// : ug/l 0// : ug/l 0// : ug/l 0// : ug/l 0// : ug/l 0// :0.00 ug/l 0// :0 Surrogate %Recovery MB MB Qualifier -Bromofluorobenzene (Surr) 0-0 0// :0 Dibromofluoromethane (Surr) 0-0 0// :0,-Dichloroethane-d (Surr) 0-0 0// :0 Toluene-d (Surr) 0-0 0// :0 Lab Sample ID: LCS 0-0/ Analysis Batch: 0 Spike Added LCS LCS Client Sample ID: Lab Control Sample Prep Type: Total/NA Benzene.00. ug/l 0-0 Bromobenzene.00. ug/l 0-0 Bromochloromethane ug/l Bromodichloromethane.00. ug/l 0-0 Bromoform.00.0 ug/l Bromomethane.00. * ug/l 0-0 Carbon disulfide.00. ug/l 0-0 Carbon tetrachloride.00.0 ug/l 0-0 Chlorobenzene.00. ug/l 0-0 Chlorodibromomethane.00.0 ug/l 0-0 Chloroethane ug/l Chloroform.00. ug/l 0-0 Chloromethane.00. ug/l 0-0 -Chlorotoluene.00. ug/l 0-0 -Chlorotoluene.00.0 ug/l 0-0 cis-,-dichloroethene.00. ug/l cis-,-dichloropropene.00.0 ug/l 0-0,-Dibromo--Chloropropane.00. ug/l 0-0,-Dibromoethane (EDB).00. ug/l 0-0 Dibromomethane.00.0 ug/l 0-0 Unit D %Rec %Rec. Page of //0

166 Client: AECOM Project/Site:.Hampstead.EL (MD) QC Sample Results Method:. - Volatile Organic Compounds (GC/MS) (Continued) Lab Sample ID: LCS 0-0/ Analysis Batch: 0 Spike Added LCS LCS TestAmerica Job ID: 0-- Client Sample ID: Lab Control Sample Prep Type: Total/NA,-Dichlorobenzene.00. ug/l 0-0,-Dichlorobenzene.00. ug/l 0-0,-Dichlorobenzene.00. ug/l 0-0 Dichlorodifluoromethane.00. ug/l 0-0,-Dichloroethane.00. ug/l 0-0,-Dichloroethane.00. ug/l 0-0,-Dichloroethene.00. ug/l 0-0,-Dichloropropane.00. ug/l 0-0,-Dichloropropane.00. ug/l 0-0,-Dichloropropane ug/l 0 0-0,-Dichloropropene.00.0 ug/l 0-0 Diisopropyl ether.00. ug/l 0-0 Ethylbenzene.00. ug/l 0-0 Ethyl tert-butyl ether.00. ug/l 0-0 Hexachlorobutadiene.00. ug/l 0-0 Isopropylbenzene.00. ug/l 0-0 Methylene Chloride.00. ug/l 0-0 Methyl tert-butyl ether.00. ug/l 0-0 Naphthalene.00.0 ug/l 0-0 n-butylbenzene.00. ug/l 0-0 N-Propylbenzene.00.0 ug/l 0-0 p-isopropyltoluene.00. ug/l 0-0 sec-butylbenzene.00. ug/l 0-0 Styrene.00. ug/l 0-0 Tert-amyl methyl ether.00. ug/l 0-0 tert-butyl alcohol ug/l 0-0 tert-butylbenzene.00. ug/l 0-0,,,-Tetrachloroethane.00. ug/l 0-0,,,-Tetrachloroethane.00. ug/l 0-0 Tetrachloroethene.00. ug/l 0-0 Toluene.00. ug/l 0-0 trans-,-dichloroethene.00. ug/l trans-,-dichloropropene.00.0 ug/l 0-0,,-Trichlorobenzene.00. ug/l 0-0,,-Trichlorobenzene.00. ug/l 0-0,,-Trichloroethane.00. ug/l 0-0,,-Trichloroethane.00.0 ug/l 0-0 Trichloroethene.00. ug/l 0-0 Trichlorofluoromethane.00. ug/l 0-0,,-Trichloropropane.00.0 ug/l 0-0,,-Trimethylbenzene.00. ug/l 0-0,,-Trimethylbenzene.00. ug/l 0-0 Vinyl chloride.00. ug/l 0-0 Xylenes, Total.0. ug/l 0-0 Unit D %Rec %Rec. Surrogate %Recovery LCS LCS Qualifier -Bromofluorobenzene (Surr) 0-0 Dibromofluoromethane (Surr) Page of //0

167 Client: AECOM Project/Site:.Hampstead.EL (MD) QC Sample Results Method:. - Volatile Organic Compounds (GC/MS) (Continued) Lab Sample ID: LCS 0-0/ Analysis Batch: 0 Surrogate %Recovery LCS LCS Qualifier,-Dichloroethane-d (Surr) 0-0 Toluene-d (Surr) 0-0 Lab Sample ID: LCSD 0-0/ Analysis Batch: 0 Spike Added LCSD LCSD TestAmerica Job ID: 0-- Client Sample ID: Lab Control Sample Prep Type: Total/NA Client Sample ID: Lab Control Sample Dup Prep Type: Total/NA Benzene.00. ug/l Bromobenzene.00.0 ug/l Bromochloromethane.00.0 ug/l Bromodichloromethane.00. ug/l Bromoform.00. ug/l Bromomethane.00.0 * ug/l Carbon disulfide.00. ug/l Carbon tetrachloride.00.0 ug/l Chlorobenzene.00. ug/l Chlorodibromomethane.00. ug/l Chloroethane.00.0 ug/l Chloroform.00. ug/l Chloromethane.00. ug/l Chlorotoluene.00.0 ug/l Chlorotoluene.00. ug/l cis-,-dichloroethene.00. * ug/l cis-,-dichloropropene.00. ug/l 0-0 0,-Dibromo--Chloropropane.00. ug/l ,-Dibromoethane (EDB).00. ug/l Dibromomethane.00. ug/l 0-0 0,-Dichlorobenzene.00.0 ug/l 0-0 0,-Dichlorobenzene.00. ug/l ,-Dichlorobenzene.00. ug/l Dichlorodifluoromethane.00. ug/l 0-0 0,-Dichloroethane.00. ug/l 0-0 0,-Dichloroethane.00. ug/l 0-0 0,-Dichloroethene.00. * ug/l 0-0 0,-Dichloropropane.00. ug/l 0-0 0,-Dichloropropane.00. ug/l 0-0 0,-Dichloropropane.00.0 * ug/l 0-0 0,-Dichloropropene.00. ug/l Diisopropyl ether.00.0 ug/l Ethylbenzene.00. ug/l Ethyl tert-butyl ether.00. ug/l Hexachlorobutadiene.00. ug/l Isopropylbenzene.00. ug/l Methylene Chloride.00. ug/l Methyl tert-butyl ether.00. ug/l Naphthalene.00.0 ug/l n-butylbenzene.00. ug/l Unit D %Rec %Rec. RPD RPD Limit Page of //0

168 Client: AECOM Project/Site:.Hampstead.EL (MD) QC Sample Results Method:. - Volatile Organic Compounds (GC/MS) (Continued) Lab Sample ID: LCSD 0-0/ Analysis Batch: 0 Spike Added LCSD LCSD TestAmerica Job ID: 0-- Client Sample ID: Lab Control Sample Dup Prep Type: Total/NA N-Propylbenzene.00. ug/l p-isopropyltoluene.00.0 ug/l sec-butylbenzene.00. ug/l Styrene.00. ug/l Tert-amyl methyl ether.00. ug/l tert-butyl alcohol 0.0. ug/l tert-butylbenzene.00.0 ug/l 0-0 0,,,-Tetrachloroethane.00.0 ug/l 0-0 0,,,-Tetrachloroethane.00. ug/l Tetrachloroethene.00. ug/l Toluene.00.0 ug/l trans-,-dichloroethene.00. ug/l trans-,-dichloropropene.00. ug/l 0-0 0,,-Trichlorobenzene.00. ug/l 0-0 0,,-Trichlorobenzene.00. ug/l 0-0 0,,-Trichloroethane.00. ug/l ,,-Trichloroethane.00. ug/l Trichloroethene.00. ug/l Trichlorofluoromethane.00.0 ug/l 0-0 0,,-Trichloropropane.00. ug/l ,,-Trimethylbenzene.00. ug/l 0-0 0,,-Trimethylbenzene.00. ug/l Vinyl chloride.00. ug/l Xylenes, Total.0. ug/l Unit D %Rec %Rec. RPD RPD Limit Surrogate LCSD LCSD %Recovery Qualifier -Bromofluorobenzene (Surr) 0-0 Dibromofluoromethane (Surr) 0-0,-Dichloroethane-d (Surr) 0-0 Toluene-d (Surr) 0-0 Page of //0

169 Client: AECOM Project/Site:.Hampstead.EL (MD) QC Association Summary TestAmerica Job ID: 0-- GC/MS VOA Analysis Batch: 0 Lab Sample ID Client Sample ID Prep Type Matrix Method Prep Batch 0-- Phillips Total/NA Water. MB 0-0/ Method Blank Total/NA LCS 0-0/ Lab Control Sample Total/NA LCSD 0-0/ Lab Control Sample Dup Total/NA Water. Water. Water. Page of //0

170 Lab Chronicle Client: AECOM TestAmerica Job ID: 0-- Project/Site:.Hampstead.EL (MD) Client Sample ID: Phillips Lab Sample ID: 0-- Date Collected: 0// : Date Received: 0// 0: Prep Type Batch Type Batch Method Run Dil Factor or Analyst Total/NA Analysis. ml ml 0 0// : SS TAL NSH Laboratory References: Initial Amount Final Amount TAL NSH =, 0 Foster Creighton Drive, Nashville, TN 0, TEL ()-0 Batch Number Lab Page of //0

171 Client: AECOM Project/Site:.Hampstead.EL (MD) Method Summary TestAmerica Job ID: 0-- Method Method Description Protocol Laboratory. Volatile Organic Compounds (GC/MS) EPA-DW TAL NSH Protocol References: EPA-DW = "Methods For The Determination Of Organic Compounds In Drinking Water", EPA/00/-/0, December And Its Supplements. Laboratory References: TAL NSH =, 0 Foster Creighton Drive, Nashville, TN 0, TEL ()-0 Page of //0

172 Accreditation/Certification Summary Client: AECOM TestAmerica Job ID: 0-- Project/Site:.Hampstead.EL (MD) Laboratory: The accreditations/certifications listed below are applicable to this report. Authority Program EPA Region Identification Number Expiration Date Maryland State Program 0-- Page of //0

173 Page of //0

174 Page of //0

175 ANALYTICAL REPORT TestAmerica Laboratories, Inc. 0 Foster Creighton Drive Nashville, TN 0 Tel: ()-0 TestAmerica Job ID: 0-- Client Project/Site:.Hampstead.EL (MD) For: AECOM 000 Virginia Manor Road Suite Beltsville, Maryland 00 Attn: Ms. Sharon Drummond Authorized for release by: //0 :: AM Leah Klingensmith, Senior Project Manager ()0-0 leah.klingensmith@testamericainc.com Designee for Jennifer Huckaba, Project Manager II ()0-0 jennifer.huckaba@testamericainc.com The test results in this report meet all 00 NELAC and 00 TNI requirements for accredited parameters, 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 Manager at the address or telephone number listed on this page. This report has been electronically signed and authorized by the signatory. Electronic signature is intended 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.

176 Client: AECOM Project/Site:.Hampstead.EL (MD) Table of Contents TestAmerica Job ID: 0-- Cover Page Table of Contents Sample Summary Case Narrative Definitions Client Sample Results QC Sample Results QC Association Chronicle Method Summary Certification Summary Chain of Custody Page of //0

177 Client: AECOM Project/Site:.Hampstead.EL (MD) Sample Summary TestAmerica Job ID: 0-- Lab Sample ID Client Sample ID Matrix Collected Received 0-- Hanover Water 0// 0: 0// 0: Page of //0

178 Case Narrative Client: AECOM TestAmerica Job ID: 0-- Project/Site:.Hampstead.EL (MD) Job ID: 0-- Laboratory: Narrative Comments No additional comments. Job Narrative 0-- Receipt The sample was received on //0 : AM; the sample arrived in good condition, properly preserved and, where required, on ice. The temperature of the cooler at receipt was.º C. GC/MS VOA Method(s).: The laboratory control sample (LCS) for analytical batch 0-0 recovered outside control limits for the following analytes: Bromomethane. These analytes were biased high in the LCS and were not detected in the associated samples; therefore, the data have been reported. Method(s).: The laboratory control sample duplicate (LCSD) for analytical batch 0-0 recovered outside control limits for the following analytes:,-dichloroethene,,-dichloropropane, Bromomethane and cis-,-dichloroethene. These analytes were biased high in the LCSD and were not detected in the associated samples; therefore, the data have been reported. Method(s).: The method blank for analytical batch 0-0 contained,,-trichlorobenzene above the reporting limit (RL). None of the samples associated with this method blank contained the target compound; therefore, re-extraction and/or re-analysis of samples were not performed. No additional analytical or quality issues were noted, other than those described above or in the Definitions/Glossary page. Page of //0

179 Client: AECOM Project/Site:.Hampstead.EL (MD) Definitions/Glossary TestAmerica Job ID: 0-- Qualifiers GC/MS VOA Qualifier Qualifier Description * LCS or LCSD is outside acceptance limits. Glossary Abbreviation 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 %R Percent Recovery CFL Contains Free Liquid CNF Contains No Free Liquid DER Duplicate Error Ratio (normalized absolute difference) 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 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) Page of //0

180 Client: AECOM Project/Site:.Hampstead.EL (MD) Client Sample ID: Hanover Date Collected: 0// 0: Date Received: 0// 0: Method:. - Volatile Organic Compounds (GC/MS) Client Sample Results RL MDL TestAmerica Job ID: 0-- Lab Sample ID: 0-- Benzene 0.00 ug/l 0// : Bromobenzene Bromochloromethane Bromodichloromethane Bromoform Bromomethane * Carbon disulfide Carbon tetrachloride Chlorobenzene Chlorodibromomethane Chloroethane Chloroform Chloromethane -Chlorotoluene -Chlorotoluene cis-,-dichloroethene * cis-,-dichloropropene,-dibromo--chloropropane,-dibromoethane (EDB) Dibromomethane,-Dichlorobenzene,-Dichlorobenzene,-Dichlorobenzene Dichlorodifluoromethane,-Dichloroethane,-Dichloroethane,-Dichloroethene *,-Dichloropropane,-Dichloropropane,-Dichloropropane *,-Dichloropropene Diisopropyl ether Ethylbenzene Ethyl tert-butyl ether Hexachlorobutadiene Isopropylbenzene Methylene Chloride Methyl tert-butyl ether Naphthalene n-butylbenzene N-Propylbenzene p-isopropyltoluene sec-butylbenzene Styrene Tert-amyl methyl ether tert-butyl alcohol tert-butylbenzene,,,-tetrachloroethane,,,-tetrachloroethane Unit D 0.00 ug/l 0// : 0.00 ug/l 0// : 0.00 ug/l 0// : 0.00 ug/l 0// : 0.00 ug/l 0// : 0.00 ug/l 0// : 0.00 ug/l 0// : 0.00 ug/l 0// : 0.00 ug/l 0// : 0.00 ug/l 0// : 0.00 ug/l 0// : 0.00 ug/l 0// : 0.00 ug/l 0// : 0.00 ug/l 0// : 0.00 ug/l 0// : 0.00 ug/l 0// :.00 ug/l 0// : 0.00 ug/l 0// : 0.00 ug/l 0// : 0.00 ug/l 0// : 0.00 ug/l 0// : 0.00 ug/l 0// : 0.00 ug/l 0// : 0.00 ug/l 0// : 0.00 ug/l 0// : 0.00 ug/l 0// : 0.00 ug/l 0// : 0.00 ug/l 0// : 0.00 ug/l 0// : 0.00 ug/l 0// : 0.00 ug/l 0// : 0.00 ug/l 0// : 0.00 ug/l 0// : 0.00 ug/l 0// : 0.00 ug/l 0// :.00 ug/l 0// : 0.00 ug/l 0// :.00 ug/l 0// : 0.00 ug/l 0// : 0.00 ug/l 0// : 0.00 ug/l 0// : 0.00 ug/l 0// : 0.00 ug/l 0// : 0.00 ug/l 0// :.0 ug/l 0// : 0.00 ug/l 0// : 0.00 ug/l 0// : 0.00 ug/l 0// : Page of //0

181 Client: AECOM Project/Site:.Hampstead.EL (MD) Client Sample ID: Hanover Date Collected: 0// 0: Date Received: 0// 0: Client Sample Results Method:. - Volatile Organic Compounds (GC/MS) (Continued) RL MDL Unit TestAmerica Job ID: 0-- Lab Sample ID: 0-- Tetrachloroethene 0.00 ug/l 0// : Toluene trans-,-dichloroethene trans-,-dichloropropene,,-trichlorobenzene,,-trichlorobenzene,,-trichloroethane,,-trichloroethane Trichloroethene Trichlorofluoromethane,,-Trichloropropane,,-Trimethylbenzene,,-Trimethylbenzene Vinyl chloride Xylenes, Total D 0.00 ug/l 0// : 0.00 ug/l 0// : 0.00 ug/l 0// : 0.00 ug/l 0// : 0.00 ug/l 0// : 0.00 ug/l 0// : 0.00 ug/l 0// : 0.00 ug/l 0// : 0.00 ug/l 0// : 0.00 ug/l 0// : 0.00 ug/l 0// : 0.00 ug/l 0// : 0.00 ug/l 0// :.00 ug/l 0// : Surrogate %Recovery Qualifier -Bromofluorobenzene (Surr) 0-0 0// : Dibromofluoromethane (Surr) 0-0 0// :,-Dichloroethane-d (Surr) 0-0 0// : Toluene-d (Surr) 0-0 0// : Page of //0

182 Client: AECOM Project/Site:.Hampstead.EL (MD) QC Sample Results Method:. - Volatile Organic Compounds (GC/MS) Lab Sample ID: MB 0-0/ Analysis Batch: 0 MB MB RL MDL TestAmerica Job ID: 0-- Client Sample ID: Method Blank Prep Type: Total/NA Benzene 0.00 ug/l 0// :0 Bromobenzene Bromochloromethane Bromodichloromethane Bromoform Bromomethane Carbon disulfide Carbon tetrachloride Chlorobenzene Chlorodibromomethane Chloroethane Chloroform Chloromethane -Chlorotoluene -Chlorotoluene cis-,-dichloroethene cis-,-dichloropropene,-dibromo--chloropropane,-dibromoethane (EDB) Dibromomethane,-Dichlorobenzene,-Dichlorobenzene,-Dichlorobenzene Dichlorodifluoromethane,-Dichloroethane,-Dichloroethane,-Dichloroethene,-Dichloropropane,-Dichloropropane,-Dichloropropane,-Dichloropropene Diisopropyl ether Ethylbenzene Ethyl tert-butyl ether Hexachlorobutadiene Isopropylbenzene Methylene Chloride Methyl tert-butyl ether Naphthalene n-butylbenzene N-Propylbenzene p-isopropyltoluene sec-butylbenzene Styrene Tert-amyl methyl ether tert-butyl alcohol tert-butylbenzene,,,-tetrachloroethane Unit D 0.00 ug/l 0// : ug/l 0// : ug/l 0// : ug/l 0// : ug/l 0// : ug/l 0// : ug/l 0// : ug/l 0// : ug/l 0// : ug/l 0// : ug/l 0// : ug/l 0// : ug/l 0// : ug/l 0// : ug/l 0// : ug/l 0// :0.00 ug/l 0// : ug/l 0// : ug/l 0// : ug/l 0// : ug/l 0// : ug/l 0// : ug/l 0// : ug/l 0// : ug/l 0// : ug/l 0// : ug/l 0// : ug/l 0// : ug/l 0// : ug/l 0// : ug/l 0// : ug/l 0// : ug/l 0// : ug/l 0// : ug/l 0// :0.00 ug/l 0// : ug/l 0// :0.00 ug/l 0// : ug/l 0// : ug/l 0// : ug/l 0// : ug/l 0// : ug/l 0// : ug/l 0// :0.0 ug/l 0// : ug/l 0// : ug/l 0// :0 Page of //0

183 Client: AECOM Project/Site:.Hampstead.EL (MD) QC Sample Results Method:. - Volatile Organic Compounds (GC/MS) (Continued) Lab Sample ID: MB 0-0/ Analysis Batch: 0 MB MB RL MDL TestAmerica Job ID: 0-- Client Sample ID: Method Blank Prep Type: Total/NA,,,-Tetrachloroethane 0.00 ug/l 0// :0 Tetrachloroethene Toluene trans-,-dichloroethene trans-,-dichloropropene,,-trichlorobenzene,,-trichlorobenzene,,-trichloroethane,,-trichloroethane Trichloroethene Trichlorofluoromethane,,-Trichloropropane,,-Trimethylbenzene,,-Trimethylbenzene Vinyl chloride Xylenes, Total Unit D 0.00 ug/l 0// : ug/l 0// : ug/l 0// : ug/l 0// : ug/l 0// : ug/l 0// : ug/l 0// : ug/l 0// : ug/l 0// : ug/l 0// : ug/l 0// : ug/l 0// : ug/l 0// : ug/l 0// :0.00 ug/l 0// :0 Surrogate %Recovery MB MB Qualifier -Bromofluorobenzene (Surr) 0-0 0// :0 Dibromofluoromethane (Surr) 0-0 0// :0,-Dichloroethane-d (Surr) 0-0 0// :0 Toluene-d (Surr) 0-0 0// :0 Lab Sample ID: LCS 0-0/ Analysis Batch: 0 Spike Added LCS LCS Client Sample ID: Lab Control Sample Prep Type: Total/NA Benzene.00. ug/l 0-0 Bromobenzene.00. ug/l 0-0 Bromochloromethane ug/l Bromodichloromethane.00. ug/l 0-0 Bromoform.00.0 ug/l Bromomethane.00. * ug/l 0-0 Carbon disulfide.00. ug/l 0-0 Carbon tetrachloride.00.0 ug/l 0-0 Chlorobenzene.00. ug/l 0-0 Chlorodibromomethane.00.0 ug/l 0-0 Chloroethane ug/l Chloroform.00. ug/l 0-0 Chloromethane.00. ug/l 0-0 -Chlorotoluene.00. ug/l 0-0 -Chlorotoluene.00.0 ug/l 0-0 cis-,-dichloroethene.00. ug/l cis-,-dichloropropene.00.0 ug/l 0-0,-Dibromo--Chloropropane.00. ug/l 0-0,-Dibromoethane (EDB).00. ug/l 0-0 Dibromomethane.00.0 ug/l 0-0 Unit D %Rec %Rec. Page of //0

184 Client: AECOM Project/Site:.Hampstead.EL (MD) QC Sample Results Method:. - Volatile Organic Compounds (GC/MS) (Continued) Lab Sample ID: LCS 0-0/ Analysis Batch: 0 Spike Added LCS LCS TestAmerica Job ID: 0-- Client Sample ID: Lab Control Sample Prep Type: Total/NA,-Dichlorobenzene.00. ug/l 0-0,-Dichlorobenzene.00. ug/l 0-0,-Dichlorobenzene.00. ug/l 0-0 Dichlorodifluoromethane.00. ug/l 0-0,-Dichloroethane.00. ug/l 0-0,-Dichloroethane.00. ug/l 0-0,-Dichloroethene.00. ug/l 0-0,-Dichloropropane.00. ug/l 0-0,-Dichloropropane.00. ug/l 0-0,-Dichloropropane ug/l 0 0-0,-Dichloropropene.00.0 ug/l 0-0 Diisopropyl ether.00. ug/l 0-0 Ethylbenzene.00. ug/l 0-0 Ethyl tert-butyl ether.00. ug/l 0-0 Hexachlorobutadiene.00. ug/l 0-0 Isopropylbenzene.00. ug/l 0-0 Methylene Chloride.00. ug/l 0-0 Methyl tert-butyl ether.00. ug/l 0-0 Naphthalene.00.0 ug/l 0-0 n-butylbenzene.00. ug/l 0-0 N-Propylbenzene.00.0 ug/l 0-0 p-isopropyltoluene.00. ug/l 0-0 sec-butylbenzene.00. ug/l 0-0 Styrene.00. ug/l 0-0 Tert-amyl methyl ether.00. ug/l 0-0 tert-butyl alcohol ug/l 0-0 tert-butylbenzene.00. ug/l 0-0,,,-Tetrachloroethane.00. ug/l 0-0,,,-Tetrachloroethane.00. ug/l 0-0 Tetrachloroethene.00. ug/l 0-0 Toluene.00. ug/l 0-0 trans-,-dichloroethene.00. ug/l trans-,-dichloropropene.00.0 ug/l 0-0,,-Trichlorobenzene.00. ug/l 0-0,,-Trichlorobenzene.00. ug/l 0-0,,-Trichloroethane.00. ug/l 0-0,,-Trichloroethane.00.0 ug/l 0-0 Trichloroethene.00. ug/l 0-0 Trichlorofluoromethane.00. ug/l 0-0,,-Trichloropropane.00.0 ug/l 0-0,,-Trimethylbenzene.00. ug/l 0-0,,-Trimethylbenzene.00. ug/l 0-0 Vinyl chloride.00. ug/l 0-0 Xylenes, Total.0. ug/l 0-0 Unit D %Rec %Rec. Surrogate %Recovery LCS LCS Qualifier -Bromofluorobenzene (Surr) 0-0 Dibromofluoromethane (Surr) Page of //0

185 Client: AECOM Project/Site:.Hampstead.EL (MD) QC Sample Results Method:. - Volatile Organic Compounds (GC/MS) (Continued) Lab Sample ID: LCS 0-0/ Analysis Batch: 0 Surrogate %Recovery LCS LCS Qualifier,-Dichloroethane-d (Surr) 0-0 Toluene-d (Surr) 0-0 Lab Sample ID: LCSD 0-0/ Analysis Batch: 0 Spike Added LCSD LCSD TestAmerica Job ID: 0-- Client Sample ID: Lab Control Sample Prep Type: Total/NA Client Sample ID: Lab Control Sample Dup Prep Type: Total/NA Benzene.00. ug/l Bromobenzene.00.0 ug/l Bromochloromethane.00.0 ug/l Bromodichloromethane.00. ug/l Bromoform.00. ug/l Bromomethane.00.0 * ug/l Carbon disulfide.00. ug/l Carbon tetrachloride.00.0 ug/l Chlorobenzene.00. ug/l Chlorodibromomethane.00. ug/l Chloroethane.00.0 ug/l Chloroform.00. ug/l Chloromethane.00. ug/l Chlorotoluene.00.0 ug/l Chlorotoluene.00. ug/l cis-,-dichloroethene.00. * ug/l cis-,-dichloropropene.00. ug/l 0-0 0,-Dibromo--Chloropropane.00. ug/l ,-Dibromoethane (EDB).00. ug/l Dibromomethane.00. ug/l 0-0 0,-Dichlorobenzene.00.0 ug/l 0-0 0,-Dichlorobenzene.00. ug/l ,-Dichlorobenzene.00. ug/l Dichlorodifluoromethane.00. ug/l 0-0 0,-Dichloroethane.00. ug/l 0-0 0,-Dichloroethane.00. ug/l 0-0 0,-Dichloroethene.00. * ug/l 0-0 0,-Dichloropropane.00. ug/l 0-0 0,-Dichloropropane.00. ug/l 0-0 0,-Dichloropropane.00.0 * ug/l 0-0 0,-Dichloropropene.00. ug/l Diisopropyl ether.00.0 ug/l Ethylbenzene.00. ug/l Ethyl tert-butyl ether.00. ug/l Hexachlorobutadiene.00. ug/l Isopropylbenzene.00. ug/l Methylene Chloride.00. ug/l Methyl tert-butyl ether.00. ug/l Naphthalene.00.0 ug/l n-butylbenzene.00. ug/l Unit D %Rec %Rec. RPD RPD Limit Page of //0

186 Client: AECOM Project/Site:.Hampstead.EL (MD) QC Sample Results Method:. - Volatile Organic Compounds (GC/MS) (Continued) Lab Sample ID: LCSD 0-0/ Analysis Batch: 0 Spike Added LCSD LCSD TestAmerica Job ID: 0-- Client Sample ID: Lab Control Sample Dup Prep Type: Total/NA N-Propylbenzene.00. ug/l p-isopropyltoluene.00.0 ug/l sec-butylbenzene.00. ug/l Styrene.00. ug/l Tert-amyl methyl ether.00. ug/l tert-butyl alcohol 0.0. ug/l tert-butylbenzene.00.0 ug/l 0-0 0,,,-Tetrachloroethane.00.0 ug/l 0-0 0,,,-Tetrachloroethane.00. ug/l Tetrachloroethene.00. ug/l Toluene.00.0 ug/l trans-,-dichloroethene.00. ug/l trans-,-dichloropropene.00. ug/l 0-0 0,,-Trichlorobenzene.00. ug/l 0-0 0,,-Trichlorobenzene.00. ug/l 0-0 0,,-Trichloroethane.00. ug/l ,,-Trichloroethane.00. ug/l Trichloroethene.00. ug/l Trichlorofluoromethane.00.0 ug/l 0-0 0,,-Trichloropropane.00. ug/l ,,-Trimethylbenzene.00. ug/l 0-0 0,,-Trimethylbenzene.00. ug/l Vinyl chloride.00. ug/l Xylenes, Total.0. ug/l Unit D %Rec %Rec. RPD RPD Limit Surrogate LCSD LCSD %Recovery Qualifier -Bromofluorobenzene (Surr) 0-0 Dibromofluoromethane (Surr) 0-0,-Dichloroethane-d (Surr) 0-0 Toluene-d (Surr) 0-0 Page of //0

187 Client: AECOM Project/Site:.Hampstead.EL (MD) QC Association Summary TestAmerica Job ID: 0-- GC/MS VOA Analysis Batch: 0 Lab Sample ID Client Sample ID Prep Type Matrix Method Prep Batch 0-- Hanover Total/NA Water. MB 0-0/ Method Blank Total/NA LCS 0-0/ Lab Control Sample Total/NA LCSD 0-0/ Lab Control Sample Dup Total/NA Water. Water. Water. Page of //0

188 Lab Chronicle Client: AECOM TestAmerica Job ID: 0-- Project/Site:.Hampstead.EL (MD) Client Sample ID: Hanover Lab Sample ID: 0-- Date Collected: 0// 0: Date Received: 0// 0: Prep Type Batch Type Batch Method Run Dil Factor or Analyst Total/NA Analysis. ml ml 0 0// : SS TAL NSH Laboratory References: Initial Amount Final Amount TAL NSH =, 0 Foster Creighton Drive, Nashville, TN 0, TEL ()-0 Batch Number Lab Page of //0

189 Client: AECOM Project/Site:.Hampstead.EL (MD) Method Summary TestAmerica Job ID: 0-- Method Method Description Protocol Laboratory. Volatile Organic Compounds (GC/MS) EPA-DW TAL NSH Protocol References: EPA-DW = "Methods For The Determination Of Organic Compounds In Drinking Water", EPA/00/-/0, December And Its Supplements. Laboratory References: TAL NSH =, 0 Foster Creighton Drive, Nashville, TN 0, TEL ()-0 Page of //0

190 Accreditation/Certification Summary Client: AECOM TestAmerica Job ID: 0-- Project/Site:.Hampstead.EL (MD) Laboratory: The accreditations/certifications listed below are applicable to this report. Authority Program EPA Region Identification Number Expiration Date Maryland State Program 0-- Page of //0

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193 ANALYTICAL REPORT TestAmerica Laboratories, Inc. 0 Foster Creighton Drive Nashville, TN 0 Tel: ()-0 TestAmerica Job ID: 0-- Client Project/Site:.Hampstead.EL (MD) For: AECOM 000 Virginia Manor Road Suite Beltsville, Maryland 00 Attn: Ms. Sharon Drummond Authorized for release by: //0 :: AM Leah Klingensmith, Senior Project Manager ()0-0 leah.klingensmith@testamericainc.com Designee for Jennifer Huckaba, Project Manager II ()0-0 jennifer.huckaba@testamericainc.com The test results in this report meet all 00 NELAC and 00 TNI requirements for accredited parameters, 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 Manager at the address or telephone number listed on this page. This report has been electronically signed and authorized by the signatory. Electronic signature is intended 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.

194 Client: AECOM Project/Site:.Hampstead.EL (MD) Table of Contents TestAmerica Job ID: 0-- Cover Page Table of Contents Sample Summary Case Narrative Definitions Client Sample Results QC Sample Results QC Association Chronicle Method Summary Certification Summary Chain of Custody Page of //0

195 Client: AECOM Project/Site:.Hampstead.EL (MD) Sample Summary TestAmerica Job ID: 0-- Lab Sample ID Client Sample ID Matrix Collected Received 0-- Hanover Water 0// : 0// 0: Page of //0

196 Case Narrative Client: AECOM TestAmerica Job ID: 0-- Project/Site:.Hampstead.EL (MD) Job ID: 0-- Laboratory: Narrative Comments No additional comments. Job Narrative 0-- Receipt The sample was received on //0 : AM; the sample arrived in good condition, properly preserved and, where required, on ice. The temperature of the cooler at receipt was.º C. GC/MS VOA Method(s).: The laboratory control sample (LCS) for analytical batch 0-0 recovered outside control limits for the following analytes: Bromomethane. These analytes were biased high in the LCS and were not detected in the associated samples; therefore, the data have been reported. Method(s).: The laboratory control sample duplicate (LCSD) for analytical batch 0-0 recovered outside control limits for the following analytes:,-dichloroethene,,-dichloropropane, Bromomethane and cis-,-dichloroethene. These analytes were biased high in the LCSD and were not detected in the associated samples; therefore, the data have been reported. Method(s).: The method blank for analytical batch 0-0 contained,,-trichlorobenzene above the reporting limit (RL). None of the samples associated with this method blank contained the target compound; therefore, re-extraction and/or re-analysis of samples were not performed. No additional analytical or quality issues were noted, other than those described above or in the Definitions/Glossary page. Page of //0

197 Client: AECOM Project/Site:.Hampstead.EL (MD) Definitions/Glossary TestAmerica Job ID: 0-- Qualifiers GC/MS VOA Qualifier Qualifier Description * LCS or LCSD is outside acceptance limits. Glossary Abbreviation 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 %R Percent Recovery CFL Contains Free Liquid CNF Contains No Free Liquid DER Duplicate Error Ratio (normalized absolute difference) 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 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) Page of //0

198 Client: AECOM Project/Site:.Hampstead.EL (MD) Client Sample ID: Hanover Date Collected: 0// : Date Received: 0// 0: Method:. - Volatile Organic Compounds (GC/MS) Client Sample Results RL MDL TestAmerica Job ID: 0-- Lab Sample ID: 0-- Benzene 0.00 ug/l 0// :0 Bromobenzene Bromochloromethane Bromodichloromethane Bromoform Bromomethane * Carbon disulfide Carbon tetrachloride Chlorobenzene Chlorodibromomethane Chloroethane Chloroform Chloromethane -Chlorotoluene -Chlorotoluene cis-,-dichloroethene * cis-,-dichloropropene,-dibromo--chloropropane,-dibromoethane (EDB) Dibromomethane,-Dichlorobenzene,-Dichlorobenzene,-Dichlorobenzene Dichlorodifluoromethane,-Dichloroethane,-Dichloroethane,-Dichloroethene *,-Dichloropropane,-Dichloropropane,-Dichloropropane *,-Dichloropropene Diisopropyl ether Ethylbenzene Ethyl tert-butyl ether Hexachlorobutadiene Isopropylbenzene Methylene Chloride Methyl tert-butyl ether Naphthalene n-butylbenzene N-Propylbenzene p-isopropyltoluene sec-butylbenzene Styrene Tert-amyl methyl ether tert-butyl alcohol tert-butylbenzene,,,-tetrachloroethane,,,-tetrachloroethane Unit D 0.00 ug/l 0// : ug/l 0// : ug/l 0// : ug/l 0// : ug/l 0// : ug/l 0// : ug/l 0// : ug/l 0// : ug/l 0// : ug/l 0// : ug/l 0// : ug/l 0// : ug/l 0// : ug/l 0// : ug/l 0// : ug/l 0// :0.00 ug/l 0// : ug/l 0// : ug/l 0// : ug/l 0// : ug/l 0// : ug/l 0// : ug/l 0// : ug/l 0// : ug/l 0// : ug/l 0// : ug/l 0// : ug/l 0// : ug/l 0// : ug/l 0// : ug/l 0// : ug/l 0// : ug/l 0// : ug/l 0// : ug/l 0// :0.00 ug/l 0// : ug/l 0// :0.00 ug/l 0// : ug/l 0// : ug/l 0// : ug/l 0// : ug/l 0// : ug/l 0// : ug/l 0// :0.0 ug/l 0// : ug/l 0// : ug/l 0// : ug/l 0// :0 Page of //0

199 Client: AECOM Project/Site:.Hampstead.EL (MD) Client Sample ID: Hanover Date Collected: 0// : Date Received: 0// 0: Client Sample Results Method:. - Volatile Organic Compounds (GC/MS) (Continued) RL MDL Unit TestAmerica Job ID: 0-- Lab Sample ID: 0-- Tetrachloroethene 0.00 ug/l 0// :0 Toluene trans-,-dichloroethene trans-,-dichloropropene,,-trichlorobenzene,,-trichlorobenzene,,-trichloroethane,,-trichloroethane Trichloroethene Trichlorofluoromethane,,-Trichloropropane,,-Trimethylbenzene,,-Trimethylbenzene Vinyl chloride Xylenes, Total D 0.00 ug/l 0// : ug/l 0// : ug/l 0// : ug/l 0// : ug/l 0// : ug/l 0// : ug/l 0// : ug/l 0// : ug/l 0// : ug/l 0// : ug/l 0// : ug/l 0// : ug/l 0// :0.00 ug/l 0// :0 Surrogate %Recovery Qualifier -Bromofluorobenzene (Surr) 0-0 0// :0 Dibromofluoromethane (Surr) 0-0 0// :0,-Dichloroethane-d (Surr) 0-0 0// :0 Toluene-d (Surr) // :0 Page of //0

200 Client: AECOM Project/Site:.Hampstead.EL (MD) QC Sample Results Method:. - Volatile Organic Compounds (GC/MS) Lab Sample ID: MB 0-0/ Analysis Batch: 0 MB MB RL MDL TestAmerica Job ID: 0-- Client Sample ID: Method Blank Prep Type: Total/NA Benzene 0.00 ug/l 0// :0 Bromobenzene Bromochloromethane Bromodichloromethane Bromoform Bromomethane Carbon disulfide Carbon tetrachloride Chlorobenzene Chlorodibromomethane Chloroethane Chloroform Chloromethane -Chlorotoluene -Chlorotoluene cis-,-dichloroethene cis-,-dichloropropene,-dibromo--chloropropane,-dibromoethane (EDB) Dibromomethane,-Dichlorobenzene,-Dichlorobenzene,-Dichlorobenzene Dichlorodifluoromethane,-Dichloroethane,-Dichloroethane,-Dichloroethene,-Dichloropropane,-Dichloropropane,-Dichloropropane,-Dichloropropene Diisopropyl ether Ethylbenzene Ethyl tert-butyl ether Hexachlorobutadiene Isopropylbenzene Methylene Chloride Methyl tert-butyl ether Naphthalene n-butylbenzene N-Propylbenzene p-isopropyltoluene sec-butylbenzene Styrene Tert-amyl methyl ether tert-butyl alcohol tert-butylbenzene,,,-tetrachloroethane Unit D 0.00 ug/l 0// : ug/l 0// : ug/l 0// : ug/l 0// : ug/l 0// : ug/l 0// : ug/l 0// : ug/l 0// : ug/l 0// : ug/l 0// : ug/l 0// : ug/l 0// : ug/l 0// : ug/l 0// : ug/l 0// : ug/l 0// :0.00 ug/l 0// : ug/l 0// : ug/l 0// : ug/l 0// : ug/l 0// : ug/l 0// : ug/l 0// : ug/l 0// : ug/l 0// : ug/l 0// : ug/l 0// : ug/l 0// : ug/l 0// : ug/l 0// : ug/l 0// : ug/l 0// : ug/l 0// : ug/l 0// : ug/l 0// :0.00 ug/l 0// : ug/l 0// :0.00 ug/l 0// : ug/l 0// : ug/l 0// : ug/l 0// : ug/l 0// : ug/l 0// : ug/l 0// :0.0 ug/l 0// : ug/l 0// : ug/l 0// :0 Page of //0

201 Client: AECOM Project/Site:.Hampstead.EL (MD) QC Sample Results Method:. - Volatile Organic Compounds (GC/MS) (Continued) Lab Sample ID: MB 0-0/ Analysis Batch: 0 MB MB RL MDL TestAmerica Job ID: 0-- Client Sample ID: Method Blank Prep Type: Total/NA,,,-Tetrachloroethane 0.00 ug/l 0// :0 Tetrachloroethene Toluene trans-,-dichloroethene trans-,-dichloropropene,,-trichlorobenzene,,-trichlorobenzene,,-trichloroethane,,-trichloroethane Trichloroethene Trichlorofluoromethane,,-Trichloropropane,,-Trimethylbenzene,,-Trimethylbenzene Vinyl chloride Xylenes, Total Unit D 0.00 ug/l 0// : ug/l 0// : ug/l 0// : ug/l 0// : ug/l 0// : ug/l 0// : ug/l 0// : ug/l 0// : ug/l 0// : ug/l 0// : ug/l 0// : ug/l 0// : ug/l 0// : ug/l 0// :0.00 ug/l 0// :0 Surrogate %Recovery MB MB Qualifier -Bromofluorobenzene (Surr) 0-0 0// :0 Dibromofluoromethane (Surr) 0-0 0// :0,-Dichloroethane-d (Surr) 0-0 0// :0 Toluene-d (Surr) 0-0 0// :0 Lab Sample ID: LCS 0-0/ Analysis Batch: 0 Spike Added LCS LCS Client Sample ID: Lab Control Sample Prep Type: Total/NA Benzene.00. ug/l 0-0 Bromobenzene.00. ug/l 0-0 Bromochloromethane ug/l Bromodichloromethane.00. ug/l 0-0 Bromoform.00.0 ug/l Bromomethane.00. * ug/l 0-0 Carbon disulfide.00. ug/l 0-0 Carbon tetrachloride.00.0 ug/l 0-0 Chlorobenzene.00. ug/l 0-0 Chlorodibromomethane.00.0 ug/l 0-0 Chloroethane ug/l Chloroform.00. ug/l 0-0 Chloromethane.00. ug/l 0-0 -Chlorotoluene.00. ug/l 0-0 -Chlorotoluene.00.0 ug/l 0-0 cis-,-dichloroethene.00. ug/l cis-,-dichloropropene.00.0 ug/l 0-0,-Dibromo--Chloropropane.00. ug/l 0-0,-Dibromoethane (EDB).00. ug/l 0-0 Dibromomethane.00.0 ug/l 0-0 Unit D %Rec %Rec. Page of //0

202 Client: AECOM Project/Site:.Hampstead.EL (MD) QC Sample Results Method:. - Volatile Organic Compounds (GC/MS) (Continued) Lab Sample ID: LCS 0-0/ Analysis Batch: 0 Spike Added LCS LCS TestAmerica Job ID: 0-- Client Sample ID: Lab Control Sample Prep Type: Total/NA,-Dichlorobenzene.00. ug/l 0-0,-Dichlorobenzene.00. ug/l 0-0,-Dichlorobenzene.00. ug/l 0-0 Dichlorodifluoromethane.00. ug/l 0-0,-Dichloroethane.00. ug/l 0-0,-Dichloroethane.00. ug/l 0-0,-Dichloroethene.00. ug/l 0-0,-Dichloropropane.00. ug/l 0-0,-Dichloropropane.00. ug/l 0-0,-Dichloropropane ug/l 0 0-0,-Dichloropropene.00.0 ug/l 0-0 Diisopropyl ether.00. ug/l 0-0 Ethylbenzene.00. ug/l 0-0 Ethyl tert-butyl ether.00. ug/l 0-0 Hexachlorobutadiene.00. ug/l 0-0 Isopropylbenzene.00. ug/l 0-0 Methylene Chloride.00. ug/l 0-0 Methyl tert-butyl ether.00. ug/l 0-0 Naphthalene.00.0 ug/l 0-0 n-butylbenzene.00. ug/l 0-0 N-Propylbenzene.00.0 ug/l 0-0 p-isopropyltoluene.00. ug/l 0-0 sec-butylbenzene.00. ug/l 0-0 Styrene.00. ug/l 0-0 Tert-amyl methyl ether.00. ug/l 0-0 tert-butyl alcohol ug/l 0-0 tert-butylbenzene.00. ug/l 0-0,,,-Tetrachloroethane.00. ug/l 0-0,,,-Tetrachloroethane.00. ug/l 0-0 Tetrachloroethene.00. ug/l 0-0 Toluene.00. ug/l 0-0 trans-,-dichloroethene.00. ug/l trans-,-dichloropropene.00.0 ug/l 0-0,,-Trichlorobenzene.00. ug/l 0-0,,-Trichlorobenzene.00. ug/l 0-0,,-Trichloroethane.00. ug/l 0-0,,-Trichloroethane.00.0 ug/l 0-0 Trichloroethene.00. ug/l 0-0 Trichlorofluoromethane.00. ug/l 0-0,,-Trichloropropane.00.0 ug/l 0-0,,-Trimethylbenzene.00. ug/l 0-0,,-Trimethylbenzene.00. ug/l 0-0 Vinyl chloride.00. ug/l 0-0 Xylenes, Total.0. ug/l 0-0 Unit D %Rec %Rec. Surrogate %Recovery LCS LCS Qualifier -Bromofluorobenzene (Surr) 0-0 Dibromofluoromethane (Surr) Page of //0

203 Client: AECOM Project/Site:.Hampstead.EL (MD) QC Sample Results Method:. - Volatile Organic Compounds (GC/MS) (Continued) Lab Sample ID: LCS 0-0/ Analysis Batch: 0 Surrogate %Recovery LCS LCS Qualifier,-Dichloroethane-d (Surr) 0-0 Toluene-d (Surr) 0-0 Lab Sample ID: LCSD 0-0/ Analysis Batch: 0 Spike Added LCSD LCSD TestAmerica Job ID: 0-- Client Sample ID: Lab Control Sample Prep Type: Total/NA Client Sample ID: Lab Control Sample Dup Prep Type: Total/NA Benzene.00. ug/l Bromobenzene.00.0 ug/l Bromochloromethane.00.0 ug/l Bromodichloromethane.00. ug/l Bromoform.00. ug/l Bromomethane.00.0 * ug/l Carbon disulfide.00. ug/l Carbon tetrachloride.00.0 ug/l Chlorobenzene.00. ug/l Chlorodibromomethane.00. ug/l Chloroethane.00.0 ug/l Chloroform.00. ug/l Chloromethane.00. ug/l Chlorotoluene.00.0 ug/l Chlorotoluene.00. ug/l cis-,-dichloroethene.00. * ug/l cis-,-dichloropropene.00. ug/l 0-0 0,-Dibromo--Chloropropane.00. ug/l ,-Dibromoethane (EDB).00. ug/l Dibromomethane.00. ug/l 0-0 0,-Dichlorobenzene.00.0 ug/l 0-0 0,-Dichlorobenzene.00. ug/l ,-Dichlorobenzene.00. ug/l Dichlorodifluoromethane.00. ug/l 0-0 0,-Dichloroethane.00. ug/l 0-0 0,-Dichloroethane.00. ug/l 0-0 0,-Dichloroethene.00. * ug/l 0-0 0,-Dichloropropane.00. ug/l 0-0 0,-Dichloropropane.00. ug/l 0-0 0,-Dichloropropane.00.0 * ug/l 0-0 0,-Dichloropropene.00. ug/l Diisopropyl ether.00.0 ug/l Ethylbenzene.00. ug/l Ethyl tert-butyl ether.00. ug/l Hexachlorobutadiene.00. ug/l Isopropylbenzene.00. ug/l Methylene Chloride.00. ug/l Methyl tert-butyl ether.00. ug/l Naphthalene.00.0 ug/l n-butylbenzene.00. ug/l Unit D %Rec %Rec. RPD RPD Limit Page of //0

204 Client: AECOM Project/Site:.Hampstead.EL (MD) QC Sample Results Method:. - Volatile Organic Compounds (GC/MS) (Continued) Lab Sample ID: LCSD 0-0/ Analysis Batch: 0 Spike Added LCSD LCSD TestAmerica Job ID: 0-- Client Sample ID: Lab Control Sample Dup Prep Type: Total/NA N-Propylbenzene.00. ug/l p-isopropyltoluene.00.0 ug/l sec-butylbenzene.00. ug/l Styrene.00. ug/l Tert-amyl methyl ether.00. ug/l tert-butyl alcohol 0.0. ug/l tert-butylbenzene.00.0 ug/l 0-0 0,,,-Tetrachloroethane.00.0 ug/l 0-0 0,,,-Tetrachloroethane.00. ug/l Tetrachloroethene.00. ug/l Toluene.00.0 ug/l trans-,-dichloroethene.00. ug/l trans-,-dichloropropene.00. ug/l 0-0 0,,-Trichlorobenzene.00. ug/l 0-0 0,,-Trichlorobenzene.00. ug/l 0-0 0,,-Trichloroethane.00. ug/l ,,-Trichloroethane.00. ug/l Trichloroethene.00. ug/l Trichlorofluoromethane.00.0 ug/l 0-0 0,,-Trichloropropane.00. ug/l ,,-Trimethylbenzene.00. ug/l 0-0 0,,-Trimethylbenzene.00. ug/l Vinyl chloride.00. ug/l Xylenes, Total.0. ug/l Unit D %Rec %Rec. RPD RPD Limit Surrogate LCSD LCSD %Recovery Qualifier -Bromofluorobenzene (Surr) 0-0 Dibromofluoromethane (Surr) 0-0,-Dichloroethane-d (Surr) 0-0 Toluene-d (Surr) 0-0 Page of //0

205 Client: AECOM Project/Site:.Hampstead.EL (MD) QC Association Summary TestAmerica Job ID: 0-- GC/MS VOA Analysis Batch: 0 Lab Sample ID Client Sample ID Prep Type Matrix Method Prep Batch 0-- Hanover Total/NA Water. MB 0-0/ Method Blank Total/NA LCS 0-0/ Lab Control Sample Total/NA LCSD 0-0/ Lab Control Sample Dup Total/NA Water. Water. Water. Page of //0

206 Lab Chronicle Client: AECOM TestAmerica Job ID: 0-- Project/Site:.Hampstead.EL (MD) Client Sample ID: Hanover Lab Sample ID: 0-- Date Collected: 0// : Date Received: 0// 0: Prep Type Batch Type Batch Method Run Dil Factor or Analyst Total/NA Analysis. ml ml 0 0// :0 SS TAL NSH Laboratory References: Initial Amount Final Amount TAL NSH =, 0 Foster Creighton Drive, Nashville, TN 0, TEL ()-0 Batch Number Lab Page of //0

207 Client: AECOM Project/Site:.Hampstead.EL (MD) Method Summary TestAmerica Job ID: 0-- Method Method Description Protocol Laboratory. Volatile Organic Compounds (GC/MS) EPA-DW TAL NSH Protocol References: EPA-DW = "Methods For The Determination Of Organic Compounds In Drinking Water", EPA/00/-/0, December And Its Supplements. Laboratory References: TAL NSH =, 0 Foster Creighton Drive, Nashville, TN 0, TEL ()-0 Page of //0

208 Accreditation/Certification Summary Client: AECOM TestAmerica Job ID: 0-- Project/Site:.Hampstead.EL (MD) Laboratory: The accreditations/certifications listed below are applicable to this report. Authority Program EPA Region Identification Number Expiration Date Maryland State Program 0-- Page of //0

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211 ANALYTICAL REPORT TestAmerica Laboratories, Inc. 0 Foster Creighton Drive Nashville, TN 0 Tel: ()-0 TestAmerica Job ID: 0-- Client Project/Site:.Hampstead.EL (MD) For: AECOM 000 Virginia Manor Road Suite Beltsville, Maryland 00 Attn: Ms. Sharon Drummond Authorized for release by: //0 ::0 AM Leah Klingensmith, Senior Project Manager ()0-0 leah.klingensmith@testamericainc.com Designee for Jennifer Huckaba, Project Manager II ()0-0 jennifer.huckaba@testamericainc.com The test results in this report meet all 00 NELAC and 00 TNI requirements for accredited parameters, 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 Manager at the address or telephone number listed on this page. This report has been electronically signed and authorized by the signatory. Electronic signature is intended 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.

212 Client: AECOM Project/Site:.Hampstead.EL (MD) Table of Contents TestAmerica Job ID: 0-- Cover Page Table of Contents Sample Summary Case Narrative Definitions Client Sample Results QC Sample Results QC Association Chronicle Method Summary Certification Summary Chain of Custody Page of //0

213 Client: AECOM Project/Site:.Hampstead.EL (MD) Sample Summary TestAmerica Job ID: 0-- Lab Sample ID Client Sample ID Matrix Collected Received 0-- Hanover Water 0// : 0// 0: Page of //0

214 Case Narrative Client: AECOM TestAmerica Job ID: 0-- Project/Site:.Hampstead.EL (MD) Job ID: 0-- Laboratory: Narrative Comments No additional comments. Job Narrative 0-- Receipt The sample was received on //0 : AM; the sample arrived in good condition, properly preserved and, where required, on ice. The temperature of the cooler at receipt was.º C. GC/MS VOA Method(s).: The laboratory control sample (LCS) for analytical batch 0-0 recovered outside control limits for the following analytes: Bromomethane. These analytes were biased high in the LCS and were not detected in the associated samples; therefore, the data have been reported. Method(s).: The laboratory control sample duplicate (LCSD) for analytical batch 0-0 recovered outside control limits for the following analytes:,-dichloroethene,,-dichloropropane, Bromomethane and cis-,-dichloroethene. These analytes were biased high in the LCSD and were not detected in the associated samples; therefore, the data have been reported. Method(s).: The method blank for analytical batch 0-0 contained,,-trichlorobenzene above the reporting limit (RL). None of the samples associated with this method blank contained the target compound; therefore, re-extraction and/or re-analysis of samples were not performed. No additional analytical or quality issues were noted, other than those described above or in the Definitions/Glossary page. Page of //0

215 Client: AECOM Project/Site:.Hampstead.EL (MD) Definitions/Glossary TestAmerica Job ID: 0-- Qualifiers GC/MS VOA Qualifier Qualifier Description * LCS or LCSD is outside acceptance limits. Glossary Abbreviation 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 %R Percent Recovery CFL Contains Free Liquid CNF Contains No Free Liquid DER Duplicate Error Ratio (normalized absolute difference) 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 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) Page of //0

216 Client: AECOM Project/Site:.Hampstead.EL (MD) Client Sample ID: Hanover Date Collected: 0// : Date Received: 0// 0: Method:. - Volatile Organic Compounds (GC/MS) Client Sample Results RL MDL TestAmerica Job ID: 0-- Lab Sample ID: 0-- Benzene 0.00 ug/l 0// : Bromobenzene Bromochloromethane Bromodichloromethane Bromoform Bromomethane * Carbon disulfide Carbon tetrachloride Chlorobenzene Chlorodibromomethane Chloroethane Chloroform Chloromethane -Chlorotoluene -Chlorotoluene cis-,-dichloroethene * cis-,-dichloropropene,-dibromo--chloropropane,-dibromoethane (EDB) Dibromomethane,-Dichlorobenzene,-Dichlorobenzene,-Dichlorobenzene Dichlorodifluoromethane,-Dichloroethane,-Dichloroethane,-Dichloroethene *,-Dichloropropane,-Dichloropropane,-Dichloropropane *,-Dichloropropene Diisopropyl ether Ethylbenzene Ethyl tert-butyl ether Hexachlorobutadiene Isopropylbenzene Methylene Chloride Methyl tert-butyl ether Naphthalene n-butylbenzene N-Propylbenzene p-isopropyltoluene sec-butylbenzene Styrene Tert-amyl methyl ether tert-butyl alcohol tert-butylbenzene,,,-tetrachloroethane,,,-tetrachloroethane Unit D 0.00 ug/l 0// : 0.00 ug/l 0// : 0.00 ug/l 0// : 0.00 ug/l 0// : 0.00 ug/l 0// : 0.00 ug/l 0// : 0.00 ug/l 0// : 0.00 ug/l 0// : 0.00 ug/l 0// : 0.00 ug/l 0// : 0.00 ug/l 0// : 0.00 ug/l 0// : 0.00 ug/l 0// : 0.00 ug/l 0// : 0.00 ug/l 0// : 0.00 ug/l 0// :.00 ug/l 0// : 0.00 ug/l 0// : 0.00 ug/l 0// : 0.00 ug/l 0// : 0.00 ug/l 0// : 0.00 ug/l 0// : 0.00 ug/l 0// : 0.00 ug/l 0// : 0.00 ug/l 0// : 0.00 ug/l 0// : 0.00 ug/l 0// : 0.00 ug/l 0// : 0.00 ug/l 0// : 0.00 ug/l 0// : 0.00 ug/l 0// : 0.00 ug/l 0// : 0.00 ug/l 0// : 0.00 ug/l 0// : 0.00 ug/l 0// :.00 ug/l 0// : 0.00 ug/l 0// :.00 ug/l 0// : 0.00 ug/l 0// : 0.00 ug/l 0// : 0.00 ug/l 0// : 0.00 ug/l 0// : 0.00 ug/l 0// : 0.00 ug/l 0// :.0 ug/l 0// : 0.00 ug/l 0// : 0.00 ug/l 0// : 0.00 ug/l 0// : Page of //0

217 Client: AECOM Project/Site:.Hampstead.EL (MD) Client Sample ID: Hanover Date Collected: 0// : Date Received: 0// 0: Client Sample Results Method:. - Volatile Organic Compounds (GC/MS) (Continued) RL MDL Unit TestAmerica Job ID: 0-- Lab Sample ID: 0-- Tetrachloroethene 0.00 ug/l 0// : Toluene trans-,-dichloroethene trans-,-dichloropropene,,-trichlorobenzene,,-trichlorobenzene,,-trichloroethane,,-trichloroethane Trichloroethene Trichlorofluoromethane,,-Trichloropropane,,-Trimethylbenzene,,-Trimethylbenzene Vinyl chloride Xylenes, Total D 0.00 ug/l 0// : 0.00 ug/l 0// : 0.00 ug/l 0// : 0.00 ug/l 0// : 0.00 ug/l 0// : 0.00 ug/l 0// : 0.00 ug/l 0// : 0.00 ug/l 0// : 0.00 ug/l 0// : 0.00 ug/l 0// : 0.00 ug/l 0// : 0.00 ug/l 0// : 0.00 ug/l 0// :.00 ug/l 0// : Surrogate %Recovery Qualifier -Bromofluorobenzene (Surr) 0-0 0// : Dibromofluoromethane (Surr) 0-0 0// :,-Dichloroethane-d (Surr) // : Toluene-d (Surr) 0-0 0// : Page of //0

218 Client: AECOM Project/Site:.Hampstead.EL (MD) QC Sample Results Method:. - Volatile Organic Compounds (GC/MS) Lab Sample ID: MB 0-0/ Analysis Batch: 0 MB MB RL MDL TestAmerica Job ID: 0-- Client Sample ID: Method Blank Prep Type: Total/NA Benzene 0.00 ug/l 0// :0 Bromobenzene Bromochloromethane Bromodichloromethane Bromoform Bromomethane Carbon disulfide Carbon tetrachloride Chlorobenzene Chlorodibromomethane Chloroethane Chloroform Chloromethane -Chlorotoluene -Chlorotoluene cis-,-dichloroethene cis-,-dichloropropene,-dibromo--chloropropane,-dibromoethane (EDB) Dibromomethane,-Dichlorobenzene,-Dichlorobenzene,-Dichlorobenzene Dichlorodifluoromethane,-Dichloroethane,-Dichloroethane,-Dichloroethene,-Dichloropropane,-Dichloropropane,-Dichloropropane,-Dichloropropene Diisopropyl ether Ethylbenzene Ethyl tert-butyl ether Hexachlorobutadiene Isopropylbenzene Methylene Chloride Methyl tert-butyl ether Naphthalene n-butylbenzene N-Propylbenzene p-isopropyltoluene sec-butylbenzene Styrene Tert-amyl methyl ether tert-butyl alcohol tert-butylbenzene,,,-tetrachloroethane Unit D 0.00 ug/l 0// : ug/l 0// : ug/l 0// : ug/l 0// : ug/l 0// : ug/l 0// : ug/l 0// : ug/l 0// : ug/l 0// : ug/l 0// : ug/l 0// : ug/l 0// : ug/l 0// : ug/l 0// : ug/l 0// : ug/l 0// :0.00 ug/l 0// : ug/l 0// : ug/l 0// : ug/l 0// : ug/l 0// : ug/l 0// : ug/l 0// : ug/l 0// : ug/l 0// : ug/l 0// : ug/l 0// : ug/l 0// : ug/l 0// : ug/l 0// : ug/l 0// : ug/l 0// : ug/l 0// : ug/l 0// : ug/l 0// :0.00 ug/l 0// : ug/l 0// :0.00 ug/l 0// : ug/l 0// : ug/l 0// : ug/l 0// : ug/l 0// : ug/l 0// : ug/l 0// :0.0 ug/l 0// : ug/l 0// : ug/l 0// :0 Page of //0

219 Client: AECOM Project/Site:.Hampstead.EL (MD) QC Sample Results Method:. - Volatile Organic Compounds (GC/MS) (Continued) Lab Sample ID: MB 0-0/ Analysis Batch: 0 MB MB RL MDL TestAmerica Job ID: 0-- Client Sample ID: Method Blank Prep Type: Total/NA,,,-Tetrachloroethane 0.00 ug/l 0// :0 Tetrachloroethene Toluene trans-,-dichloroethene trans-,-dichloropropene,,-trichlorobenzene,,-trichlorobenzene,,-trichloroethane,,-trichloroethane Trichloroethene Trichlorofluoromethane,,-Trichloropropane,,-Trimethylbenzene,,-Trimethylbenzene Vinyl chloride Xylenes, Total Unit D 0.00 ug/l 0// : ug/l 0// : ug/l 0// : ug/l 0// : ug/l 0// : ug/l 0// : ug/l 0// : ug/l 0// : ug/l 0// : ug/l 0// : ug/l 0// : ug/l 0// : ug/l 0// : ug/l 0// :0.00 ug/l 0// :0 Surrogate %Recovery MB MB Qualifier -Bromofluorobenzene (Surr) 0-0 0// :0 Dibromofluoromethane (Surr) 0-0 0// :0,-Dichloroethane-d (Surr) 0-0 0// :0 Toluene-d (Surr) 0-0 0// :0 Lab Sample ID: LCS 0-0/ Analysis Batch: 0 Spike Added LCS LCS Client Sample ID: Lab Control Sample Prep Type: Total/NA Benzene.00. ug/l 0-0 Bromobenzene.00. ug/l 0-0 Bromochloromethane ug/l Bromodichloromethane.00. ug/l 0-0 Bromoform.00.0 ug/l Bromomethane.00. * ug/l 0-0 Carbon disulfide.00. ug/l 0-0 Carbon tetrachloride.00.0 ug/l 0-0 Chlorobenzene.00. ug/l 0-0 Chlorodibromomethane.00.0 ug/l 0-0 Chloroethane ug/l Chloroform.00. ug/l 0-0 Chloromethane.00. ug/l 0-0 -Chlorotoluene.00. ug/l 0-0 -Chlorotoluene.00.0 ug/l 0-0 cis-,-dichloroethene.00. ug/l cis-,-dichloropropene.00.0 ug/l 0-0,-Dibromo--Chloropropane.00. ug/l 0-0,-Dibromoethane (EDB).00. ug/l 0-0 Dibromomethane.00.0 ug/l 0-0 Unit D %Rec %Rec. Page of //0

220 Client: AECOM Project/Site:.Hampstead.EL (MD) QC Sample Results Method:. - Volatile Organic Compounds (GC/MS) (Continued) Lab Sample ID: LCS 0-0/ Analysis Batch: 0 Spike Added LCS LCS TestAmerica Job ID: 0-- Client Sample ID: Lab Control Sample Prep Type: Total/NA,-Dichlorobenzene.00. ug/l 0-0,-Dichlorobenzene.00. ug/l 0-0,-Dichlorobenzene.00. ug/l 0-0 Dichlorodifluoromethane.00. ug/l 0-0,-Dichloroethane.00. ug/l 0-0,-Dichloroethane.00. ug/l 0-0,-Dichloroethene.00. ug/l 0-0,-Dichloropropane.00. ug/l 0-0,-Dichloropropane.00. ug/l 0-0,-Dichloropropane ug/l 0 0-0,-Dichloropropene.00.0 ug/l 0-0 Diisopropyl ether.00. ug/l 0-0 Ethylbenzene.00. ug/l 0-0 Ethyl tert-butyl ether.00. ug/l 0-0 Hexachlorobutadiene.00. ug/l 0-0 Isopropylbenzene.00. ug/l 0-0 Methylene Chloride.00. ug/l 0-0 Methyl tert-butyl ether.00. ug/l 0-0 Naphthalene.00.0 ug/l 0-0 n-butylbenzene.00. ug/l 0-0 N-Propylbenzene.00.0 ug/l 0-0 p-isopropyltoluene.00. ug/l 0-0 sec-butylbenzene.00. ug/l 0-0 Styrene.00. ug/l 0-0 Tert-amyl methyl ether.00. ug/l 0-0 tert-butyl alcohol ug/l 0-0 tert-butylbenzene.00. ug/l 0-0,,,-Tetrachloroethane.00. ug/l 0-0,,,-Tetrachloroethane.00. ug/l 0-0 Tetrachloroethene.00. ug/l 0-0 Toluene.00. ug/l 0-0 trans-,-dichloroethene.00. ug/l trans-,-dichloropropene.00.0 ug/l 0-0,,-Trichlorobenzene.00. ug/l 0-0,,-Trichlorobenzene.00. ug/l 0-0,,-Trichloroethane.00. ug/l 0-0,,-Trichloroethane.00.0 ug/l 0-0 Trichloroethene.00. ug/l 0-0 Trichlorofluoromethane.00. ug/l 0-0,,-Trichloropropane.00.0 ug/l 0-0,,-Trimethylbenzene.00. ug/l 0-0,,-Trimethylbenzene.00. ug/l 0-0 Vinyl chloride.00. ug/l 0-0 Xylenes, Total.0. ug/l 0-0 Unit D %Rec %Rec. Surrogate %Recovery LCS LCS Qualifier -Bromofluorobenzene (Surr) 0-0 Dibromofluoromethane (Surr) Page of //0

221 Client: AECOM Project/Site:.Hampstead.EL (MD) QC Sample Results Method:. - Volatile Organic Compounds (GC/MS) (Continued) Lab Sample ID: LCS 0-0/ Analysis Batch: 0 Surrogate %Recovery LCS LCS Qualifier,-Dichloroethane-d (Surr) 0-0 Toluene-d (Surr) 0-0 Lab Sample ID: LCSD 0-0/ Analysis Batch: 0 Spike Added LCSD LCSD TestAmerica Job ID: 0-- Client Sample ID: Lab Control Sample Prep Type: Total/NA Client Sample ID: Lab Control Sample Dup Prep Type: Total/NA Benzene.00. ug/l Bromobenzene.00.0 ug/l Bromochloromethane.00.0 ug/l Bromodichloromethane.00. ug/l Bromoform.00. ug/l Bromomethane.00.0 * ug/l Carbon disulfide.00. ug/l Carbon tetrachloride.00.0 ug/l Chlorobenzene.00. ug/l Chlorodibromomethane.00. ug/l Chloroethane.00.0 ug/l Chloroform.00. ug/l Chloromethane.00. ug/l Chlorotoluene.00.0 ug/l Chlorotoluene.00. ug/l cis-,-dichloroethene.00. * ug/l cis-,-dichloropropene.00. ug/l 0-0 0,-Dibromo--Chloropropane.00. ug/l ,-Dibromoethane (EDB).00. ug/l Dibromomethane.00. ug/l 0-0 0,-Dichlorobenzene.00.0 ug/l 0-0 0,-Dichlorobenzene.00. ug/l ,-Dichlorobenzene.00. ug/l Dichlorodifluoromethane.00. ug/l 0-0 0,-Dichloroethane.00. ug/l 0-0 0,-Dichloroethane.00. ug/l 0-0 0,-Dichloroethene.00. * ug/l 0-0 0,-Dichloropropane.00. ug/l 0-0 0,-Dichloropropane.00. ug/l 0-0 0,-Dichloropropane.00.0 * ug/l 0-0 0,-Dichloropropene.00. ug/l Diisopropyl ether.00.0 ug/l Ethylbenzene.00. ug/l Ethyl tert-butyl ether.00. ug/l Hexachlorobutadiene.00. ug/l Isopropylbenzene.00. ug/l Methylene Chloride.00. ug/l Methyl tert-butyl ether.00. ug/l Naphthalene.00.0 ug/l n-butylbenzene.00. ug/l Unit D %Rec %Rec. RPD RPD Limit Page of //0

222 Client: AECOM Project/Site:.Hampstead.EL (MD) QC Sample Results Method:. - Volatile Organic Compounds (GC/MS) (Continued) Lab Sample ID: LCSD 0-0/ Analysis Batch: 0 Spike Added LCSD LCSD TestAmerica Job ID: 0-- Client Sample ID: Lab Control Sample Dup Prep Type: Total/NA N-Propylbenzene.00. ug/l p-isopropyltoluene.00.0 ug/l sec-butylbenzene.00. ug/l Styrene.00. ug/l Tert-amyl methyl ether.00. ug/l tert-butyl alcohol 0.0. ug/l tert-butylbenzene.00.0 ug/l 0-0 0,,,-Tetrachloroethane.00.0 ug/l 0-0 0,,,-Tetrachloroethane.00. ug/l Tetrachloroethene.00. ug/l Toluene.00.0 ug/l trans-,-dichloroethene.00. ug/l trans-,-dichloropropene.00. ug/l 0-0 0,,-Trichlorobenzene.00. ug/l 0-0 0,,-Trichlorobenzene.00. ug/l 0-0 0,,-Trichloroethane.00. ug/l ,,-Trichloroethane.00. ug/l Trichloroethene.00. ug/l Trichlorofluoromethane.00.0 ug/l 0-0 0,,-Trichloropropane.00. ug/l ,,-Trimethylbenzene.00. ug/l 0-0 0,,-Trimethylbenzene.00. ug/l Vinyl chloride.00. ug/l Xylenes, Total.0. ug/l Unit D %Rec %Rec. RPD RPD Limit Surrogate LCSD LCSD %Recovery Qualifier -Bromofluorobenzene (Surr) 0-0 Dibromofluoromethane (Surr) 0-0,-Dichloroethane-d (Surr) 0-0 Toluene-d (Surr) 0-0 Page of //0

223 Client: AECOM Project/Site:.Hampstead.EL (MD) QC Association Summary TestAmerica Job ID: 0-- GC/MS VOA Analysis Batch: 0 Lab Sample ID Client Sample ID Prep Type Matrix Method Prep Batch 0-- Hanover Total/NA Water. MB 0-0/ Method Blank Total/NA LCS 0-0/ Lab Control Sample Total/NA LCSD 0-0/ Lab Control Sample Dup Total/NA Water. Water. Water. Page of //0

224 Lab Chronicle Client: AECOM TestAmerica Job ID: 0-- Project/Site:.Hampstead.EL (MD) Client Sample ID: Hanover Lab Sample ID: 0-- Date Collected: 0// : Date Received: 0// 0: Prep Type Batch Type Batch Method Run Dil Factor or Analyst Total/NA Analysis. ml ml 0 0// : SS TAL NSH Laboratory References: Initial Amount Final Amount TAL NSH =, 0 Foster Creighton Drive, Nashville, TN 0, TEL ()-0 Batch Number Lab Page of //0

225 Client: AECOM Project/Site:.Hampstead.EL (MD) Method Summary TestAmerica Job ID: 0-- Method Method Description Protocol Laboratory. Volatile Organic Compounds (GC/MS) EPA-DW TAL NSH Protocol References: EPA-DW = "Methods For The Determination Of Organic Compounds In Drinking Water", EPA/00/-/0, December And Its Supplements. Laboratory References: TAL NSH =, 0 Foster Creighton Drive, Nashville, TN 0, TEL ()-0 Page of //0

226 Accreditation/Certification Summary Client: AECOM TestAmerica Job ID: 0-- Project/Site:.Hampstead.EL (MD) Laboratory: The accreditations/certifications listed below are applicable to this report. Authority Program EPA Region Identification Number Expiration Date Maryland State Program 0-- Page of //0

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229 ANALYTICAL REPORT TestAmerica Laboratories, Inc. 0 Foster Creighton Drive Nashville, TN 0 Tel: ()-0 TestAmerica Job ID: 0-- Client Project/Site:.Hampstead.EL (MD) For: AECOM 000 Virginia Manor Road Suite Beltsville, Maryland 00 Attn: Ms. Sharon Drummond Authorized for release by: //0 :: AM Leah Klingensmith, Senior Project Manager ()0-0 leah.klingensmith@testamericainc.com Designee for Jennifer Huckaba, Project Manager II ()0-0 jennifer.huckaba@testamericainc.com The test results in this report meet all 00 NELAC and 00 TNI requirements for accredited parameters, 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 Manager at the address or telephone number listed on this page. This report has been electronically signed and authorized by the signatory. Electronic signature is intended 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.

230 Client: AECOM Project/Site:.Hampstead.EL (MD) Table of Contents TestAmerica Job ID: 0-- Cover Page Table of Contents Sample Summary Case Narrative Definitions Client Sample Results QC Sample Results QC Association Chronicle Method Summary Certification Summary Chain of Custody Page of //0

231 Client: AECOM Project/Site:.Hampstead.EL (MD) Sample Summary TestAmerica Job ID: 0-- Lab Sample ID Client Sample ID Matrix Collected Received Hanover Water 0// : 0// 0: Page of //0

232 Case Narrative Client: AECOM TestAmerica Job ID: 0-- Project/Site:.Hampstead.EL (MD) Job ID: 0-- Laboratory: Narrative Comments No additional comments. Job Narrative 0-- Receipt The sample was received on //0 : AM; the sample arrived in good condition, properly preserved and, where required, on ice. The temperature of the cooler at receipt was.º C. GC/MS VOA Method(s).: The laboratory control sample (LCS) for analytical batch 0-0 recovered outside control limits for the following analytes: Bromomethane. These analytes were biased high in the LCS and were not detected in the associated samples; therefore, the data have been reported. Method(s).: The laboratory control sample duplicate (LCSD) for analytical batch 0-0 recovered outside control limits for the following analytes:,-dichloroethene,,-dichloropropane, Bromomethane and cis-,-dichloroethene. These analytes were biased high in the LCSD and were not detected in the associated samples; therefore, the data have been reported. Method(s).: The method blank for analytical batch 0-0 contained,,-trichlorobenzene above the reporting limit (RL). None of the samples associated with this method blank contained the target compound; therefore, re-extraction and/or re-analysis of samples were not performed. No additional analytical or quality issues were noted, other than those described above or in the Definitions/Glossary page. Page of //0

233 Client: AECOM Project/Site:.Hampstead.EL (MD) Definitions/Glossary TestAmerica Job ID: 0-- Qualifiers GC/MS VOA Qualifier Qualifier Description * LCS or LCSD is outside acceptance limits. Glossary Abbreviation 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 %R Percent Recovery CFL Contains Free Liquid CNF Contains No Free Liquid DER Duplicate Error Ratio (normalized absolute difference) 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 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) Page of //0

234 Client: AECOM Project/Site:.Hampstead.EL (MD) Client Sample ID: 0 Hanover Date Collected: 0// : Date Received: 0// 0: Method:. - Volatile Organic Compounds (GC/MS) Client Sample Results RL MDL TestAmerica Job ID: 0-- Lab Sample ID: 0-- Benzene 0.00 ug/l 0// :0 Bromobenzene Bromochloromethane Bromodichloromethane Bromoform Bromomethane * Carbon disulfide Carbon tetrachloride Chlorobenzene Chlorodibromomethane Chloroethane Chloroform Chloromethane -Chlorotoluene -Chlorotoluene cis-,-dichloroethene * cis-,-dichloropropene,-dibromo--chloropropane,-dibromoethane (EDB) Dibromomethane,-Dichlorobenzene,-Dichlorobenzene,-Dichlorobenzene Dichlorodifluoromethane,-Dichloroethane,-Dichloroethane,-Dichloroethene *,-Dichloropropane,-Dichloropropane,-Dichloropropane *,-Dichloropropene Diisopropyl ether Ethylbenzene Ethyl tert-butyl ether Hexachlorobutadiene Isopropylbenzene Methylene Chloride Methyl tert-butyl ether Naphthalene n-butylbenzene N-Propylbenzene p-isopropyltoluene sec-butylbenzene Styrene Tert-amyl methyl ether tert-butyl alcohol tert-butylbenzene,,,-tetrachloroethane,,,-tetrachloroethane Unit D 0.00 ug/l 0// : ug/l 0// : ug/l 0// : ug/l 0// : ug/l 0// : ug/l 0// : ug/l 0// : ug/l 0// : ug/l 0// : ug/l 0// : ug/l 0// : ug/l 0// : ug/l 0// : ug/l 0// : ug/l 0// : ug/l 0// :0.00 ug/l 0// : ug/l 0// : ug/l 0// : ug/l 0// : ug/l 0// : ug/l 0// : ug/l 0// : ug/l 0// : ug/l 0// : ug/l 0// : ug/l 0// : ug/l 0// : ug/l 0// : ug/l 0// : ug/l 0// : ug/l 0// : ug/l 0// : ug/l 0// : ug/l 0// :0.00 ug/l 0// : ug/l 0// :0.00 ug/l 0// : ug/l 0// : ug/l 0// : ug/l 0// : ug/l 0// : ug/l 0// : ug/l 0// :0.0 ug/l 0// : ug/l 0// : ug/l 0// : ug/l 0// :0 Page of //0

235 Client: AECOM Project/Site:.Hampstead.EL (MD) Client Sample ID: 0 Hanover Date Collected: 0// : Date Received: 0// 0: Client Sample Results Method:. - Volatile Organic Compounds (GC/MS) (Continued) RL MDL Unit TestAmerica Job ID: 0-- Lab Sample ID: 0-- Tetrachloroethene 0.00 ug/l 0// :0 Toluene trans-,-dichloroethene trans-,-dichloropropene,,-trichlorobenzene,,-trichlorobenzene,,-trichloroethane,,-trichloroethane Trichloroethene Trichlorofluoromethane,,-Trichloropropane,,-Trimethylbenzene,,-Trimethylbenzene Vinyl chloride Xylenes, Total D 0.00 ug/l 0// : ug/l 0// : ug/l 0// : ug/l 0// : ug/l 0// : ug/l 0// : ug/l 0// : ug/l 0// : ug/l 0// : ug/l 0// : ug/l 0// : ug/l 0// : ug/l 0// :0.00 ug/l 0// :0 Surrogate %Recovery Qualifier -Bromofluorobenzene (Surr) 0-0 0// :0 Dibromofluoromethane (Surr) 0-0 0// :0,-Dichloroethane-d (Surr) 0-0 0// :0 Toluene-d (Surr) 0-0 0// :0 Page of //0

236 Client: AECOM Project/Site:.Hampstead.EL (MD) QC Sample Results Method:. - Volatile Organic Compounds (GC/MS) Lab Sample ID: MB 0-0/ Analysis Batch: 0 MB MB RL MDL TestAmerica Job ID: 0-- Client Sample ID: Method Blank Prep Type: Total/NA Benzene 0.00 ug/l 0// :0 Bromobenzene Bromochloromethane Bromodichloromethane Bromoform Bromomethane Carbon disulfide Carbon tetrachloride Chlorobenzene Chlorodibromomethane Chloroethane Chloroform Chloromethane -Chlorotoluene -Chlorotoluene cis-,-dichloroethene cis-,-dichloropropene,-dibromo--chloropropane,-dibromoethane (EDB) Dibromomethane,-Dichlorobenzene,-Dichlorobenzene,-Dichlorobenzene Dichlorodifluoromethane,-Dichloroethane,-Dichloroethane,-Dichloroethene,-Dichloropropane,-Dichloropropane,-Dichloropropane,-Dichloropropene Diisopropyl ether Ethylbenzene Ethyl tert-butyl ether Hexachlorobutadiene Isopropylbenzene Methylene Chloride Methyl tert-butyl ether Naphthalene n-butylbenzene N-Propylbenzene p-isopropyltoluene sec-butylbenzene Styrene Tert-amyl methyl ether tert-butyl alcohol tert-butylbenzene,,,-tetrachloroethane Unit D 0.00 ug/l 0// : ug/l 0// : ug/l 0// : ug/l 0// : ug/l 0// : ug/l 0// : ug/l 0// : ug/l 0// : ug/l 0// : ug/l 0// : ug/l 0// : ug/l 0// : ug/l 0// : ug/l 0// : ug/l 0// : ug/l 0// :0.00 ug/l 0// : ug/l 0// : ug/l 0// : ug/l 0// : ug/l 0// : ug/l 0// : ug/l 0// : ug/l 0// : ug/l 0// : ug/l 0// : ug/l 0// : ug/l 0// : ug/l 0// : ug/l 0// : ug/l 0// : ug/l 0// : ug/l 0// : ug/l 0// : ug/l 0// :0.00 ug/l 0// : ug/l 0// :0.00 ug/l 0// : ug/l 0// : ug/l 0// : ug/l 0// : ug/l 0// : ug/l 0// : ug/l 0// :0.0 ug/l 0// : ug/l 0// : ug/l 0// :0 Page of //0

237 Client: AECOM Project/Site:.Hampstead.EL (MD) QC Sample Results Method:. - Volatile Organic Compounds (GC/MS) (Continued) Lab Sample ID: MB 0-0/ Analysis Batch: 0 MB MB RL MDL TestAmerica Job ID: 0-- Client Sample ID: Method Blank Prep Type: Total/NA,,,-Tetrachloroethane 0.00 ug/l 0// :0 Tetrachloroethene Toluene trans-,-dichloroethene trans-,-dichloropropene,,-trichlorobenzene,,-trichlorobenzene,,-trichloroethane,,-trichloroethane Trichloroethene Trichlorofluoromethane,,-Trichloropropane,,-Trimethylbenzene,,-Trimethylbenzene Vinyl chloride Xylenes, Total Unit D 0.00 ug/l 0// : ug/l 0// : ug/l 0// : ug/l 0// : ug/l 0// : ug/l 0// : ug/l 0// : ug/l 0// : ug/l 0// : ug/l 0// : ug/l 0// : ug/l 0// : ug/l 0// : ug/l 0// :0.00 ug/l 0// :0 Surrogate %Recovery MB MB Qualifier -Bromofluorobenzene (Surr) 0-0 0// :0 Dibromofluoromethane (Surr) 0-0 0// :0,-Dichloroethane-d (Surr) 0-0 0// :0 Toluene-d (Surr) 0-0 0// :0 Lab Sample ID: LCS 0-0/ Analysis Batch: 0 Spike Added LCS LCS Client Sample ID: Lab Control Sample Prep Type: Total/NA Benzene.00. ug/l 0-0 Bromobenzene.00. ug/l 0-0 Bromochloromethane ug/l Bromodichloromethane.00. ug/l 0-0 Bromoform.00.0 ug/l Bromomethane.00. * ug/l 0-0 Carbon disulfide.00. ug/l 0-0 Carbon tetrachloride.00.0 ug/l 0-0 Chlorobenzene.00. ug/l 0-0 Chlorodibromomethane.00.0 ug/l 0-0 Chloroethane ug/l Chloroform.00. ug/l 0-0 Chloromethane.00. ug/l 0-0 -Chlorotoluene.00. ug/l 0-0 -Chlorotoluene.00.0 ug/l 0-0 cis-,-dichloroethene.00. ug/l cis-,-dichloropropene.00.0 ug/l 0-0,-Dibromo--Chloropropane.00. ug/l 0-0,-Dibromoethane (EDB).00. ug/l 0-0 Dibromomethane.00.0 ug/l 0-0 Unit D %Rec %Rec. Page of //0

238 Client: AECOM Project/Site:.Hampstead.EL (MD) QC Sample Results Method:. - Volatile Organic Compounds (GC/MS) (Continued) Lab Sample ID: LCS 0-0/ Analysis Batch: 0 Spike Added LCS LCS TestAmerica Job ID: 0-- Client Sample ID: Lab Control Sample Prep Type: Total/NA,-Dichlorobenzene.00. ug/l 0-0,-Dichlorobenzene.00. ug/l 0-0,-Dichlorobenzene.00. ug/l 0-0 Dichlorodifluoromethane.00. ug/l 0-0,-Dichloroethane.00. ug/l 0-0,-Dichloroethane.00. ug/l 0-0,-Dichloroethene.00. ug/l 0-0,-Dichloropropane.00. ug/l 0-0,-Dichloropropane.00. ug/l 0-0,-Dichloropropane ug/l 0 0-0,-Dichloropropene.00.0 ug/l 0-0 Diisopropyl ether.00. ug/l 0-0 Ethylbenzene.00. ug/l 0-0 Ethyl tert-butyl ether.00. ug/l 0-0 Hexachlorobutadiene.00. ug/l 0-0 Isopropylbenzene.00. ug/l 0-0 Methylene Chloride.00. ug/l 0-0 Methyl tert-butyl ether.00. ug/l 0-0 Naphthalene.00.0 ug/l 0-0 n-butylbenzene.00. ug/l 0-0 N-Propylbenzene.00.0 ug/l 0-0 p-isopropyltoluene.00. ug/l 0-0 sec-butylbenzene.00. ug/l 0-0 Styrene.00. ug/l 0-0 Tert-amyl methyl ether.00. ug/l 0-0 tert-butyl alcohol ug/l 0-0 tert-butylbenzene.00. ug/l 0-0,,,-Tetrachloroethane.00. ug/l 0-0,,,-Tetrachloroethane.00. ug/l 0-0 Tetrachloroethene.00. ug/l 0-0 Toluene.00. ug/l 0-0 trans-,-dichloroethene.00. ug/l trans-,-dichloropropene.00.0 ug/l 0-0,,-Trichlorobenzene.00. ug/l 0-0,,-Trichlorobenzene.00. ug/l 0-0,,-Trichloroethane.00. ug/l 0-0,,-Trichloroethane.00.0 ug/l 0-0 Trichloroethene.00. ug/l 0-0 Trichlorofluoromethane.00. ug/l 0-0,,-Trichloropropane.00.0 ug/l 0-0,,-Trimethylbenzene.00. ug/l 0-0,,-Trimethylbenzene.00. ug/l 0-0 Vinyl chloride.00. ug/l 0-0 Xylenes, Total.0. ug/l 0-0 Unit D %Rec %Rec. Surrogate %Recovery LCS LCS Qualifier -Bromofluorobenzene (Surr) 0-0 Dibromofluoromethane (Surr) Page of //0

239 Client: AECOM Project/Site:.Hampstead.EL (MD) QC Sample Results Method:. - Volatile Organic Compounds (GC/MS) (Continued) Lab Sample ID: LCS 0-0/ Analysis Batch: 0 Surrogate %Recovery LCS LCS Qualifier,-Dichloroethane-d (Surr) 0-0 Toluene-d (Surr) 0-0 Lab Sample ID: LCSD 0-0/ Analysis Batch: 0 Spike Added LCSD LCSD TestAmerica Job ID: 0-- Client Sample ID: Lab Control Sample Prep Type: Total/NA Client Sample ID: Lab Control Sample Dup Prep Type: Total/NA Benzene.00. ug/l Bromobenzene.00.0 ug/l Bromochloromethane.00.0 ug/l Bromodichloromethane.00. ug/l Bromoform.00. ug/l Bromomethane.00.0 * ug/l Carbon disulfide.00. ug/l Carbon tetrachloride.00.0 ug/l Chlorobenzene.00. ug/l Chlorodibromomethane.00. ug/l Chloroethane.00.0 ug/l Chloroform.00. ug/l Chloromethane.00. ug/l Chlorotoluene.00.0 ug/l Chlorotoluene.00. ug/l cis-,-dichloroethene.00. * ug/l cis-,-dichloropropene.00. ug/l 0-0 0,-Dibromo--Chloropropane.00. ug/l ,-Dibromoethane (EDB).00. ug/l Dibromomethane.00. ug/l 0-0 0,-Dichlorobenzene.00.0 ug/l 0-0 0,-Dichlorobenzene.00. ug/l ,-Dichlorobenzene.00. ug/l Dichlorodifluoromethane.00. ug/l 0-0 0,-Dichloroethane.00. ug/l 0-0 0,-Dichloroethane.00. ug/l 0-0 0,-Dichloroethene.00. * ug/l 0-0 0,-Dichloropropane.00. ug/l 0-0 0,-Dichloropropane.00. ug/l 0-0 0,-Dichloropropane.00.0 * ug/l 0-0 0,-Dichloropropene.00. ug/l Diisopropyl ether.00.0 ug/l Ethylbenzene.00. ug/l Ethyl tert-butyl ether.00. ug/l Hexachlorobutadiene.00. ug/l Isopropylbenzene.00. ug/l Methylene Chloride.00. ug/l Methyl tert-butyl ether.00. ug/l Naphthalene.00.0 ug/l n-butylbenzene.00. ug/l Unit D %Rec %Rec. RPD RPD Limit Page of //0

240 Client: AECOM Project/Site:.Hampstead.EL (MD) QC Sample Results Method:. - Volatile Organic Compounds (GC/MS) (Continued) Lab Sample ID: LCSD 0-0/ Analysis Batch: 0 Spike Added LCSD LCSD TestAmerica Job ID: 0-- Client Sample ID: Lab Control Sample Dup Prep Type: Total/NA N-Propylbenzene.00. ug/l p-isopropyltoluene.00.0 ug/l sec-butylbenzene.00. ug/l Styrene.00. ug/l Tert-amyl methyl ether.00. ug/l tert-butyl alcohol 0.0. ug/l tert-butylbenzene.00.0 ug/l 0-0 0,,,-Tetrachloroethane.00.0 ug/l 0-0 0,,,-Tetrachloroethane.00. ug/l Tetrachloroethene.00. ug/l Toluene.00.0 ug/l trans-,-dichloroethene.00. ug/l trans-,-dichloropropene.00. ug/l 0-0 0,,-Trichlorobenzene.00. ug/l 0-0 0,,-Trichlorobenzene.00. ug/l 0-0 0,,-Trichloroethane.00. ug/l ,,-Trichloroethane.00. ug/l Trichloroethene.00. ug/l Trichlorofluoromethane.00.0 ug/l 0-0 0,,-Trichloropropane.00. ug/l ,,-Trimethylbenzene.00. ug/l 0-0 0,,-Trimethylbenzene.00. ug/l Vinyl chloride.00. ug/l Xylenes, Total.0. ug/l Unit D %Rec %Rec. RPD RPD Limit Surrogate LCSD LCSD %Recovery Qualifier -Bromofluorobenzene (Surr) 0-0 Dibromofluoromethane (Surr) 0-0,-Dichloroethane-d (Surr) 0-0 Toluene-d (Surr) 0-0 Page of //0

241 Client: AECOM Project/Site:.Hampstead.EL (MD) QC Association Summary TestAmerica Job ID: 0-- GC/MS VOA Analysis Batch: 0 Lab Sample ID Client Sample ID Prep Type Matrix Method Prep Batch Hanover Total/NA Water. MB 0-0/ Method Blank Total/NA LCS 0-0/ Lab Control Sample Total/NA LCSD 0-0/ Lab Control Sample Dup Total/NA Water. Water. Water. Page of //0

242 Lab Chronicle Client: AECOM TestAmerica Job ID: 0-- Project/Site:.Hampstead.EL (MD) Client Sample ID: 0 Hanover Lab Sample ID: 0-- Date Collected: 0// : Date Received: 0// 0: Prep Type Batch Type Batch Method Run Dil Factor or Analyst Total/NA Analysis. ml ml 0 0// :0 SS TAL NSH Laboratory References: Initial Amount Final Amount TAL NSH =, 0 Foster Creighton Drive, Nashville, TN 0, TEL ()-0 Batch Number Lab Page of //0

243 Client: AECOM Project/Site:.Hampstead.EL (MD) Method Summary TestAmerica Job ID: 0-- Method Method Description Protocol Laboratory. Volatile Organic Compounds (GC/MS) EPA-DW TAL NSH Protocol References: EPA-DW = "Methods For The Determination Of Organic Compounds In Drinking Water", EPA/00/-/0, December And Its Supplements. Laboratory References: TAL NSH =, 0 Foster Creighton Drive, Nashville, TN 0, TEL ()-0 Page of //0

244 Accreditation/Certification Summary Client: AECOM TestAmerica Job ID: 0-- Project/Site:.Hampstead.EL (MD) Laboratory: The accreditations/certifications listed below are applicable to this report. Authority Program EPA Region Identification Number Expiration Date Maryland State Program 0-- Page of //0

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247 ANALYTICAL REPORT TestAmerica Laboratories, Inc. 0 Foster Creighton Drive Nashville, TN 0 Tel: ()-0 TestAmerica Job ID: 0-0- Client Project/Site:.Hampstead.EL (MD) For: AECOM 000 Virginia Manor Road Suite Beltsville, Maryland 00 Attn: Ms. Sharon Drummond Authorized for release by: //0 :: PM Leah Klingensmith, Senior Project Manager ()0-0 leah.klingensmith@testamericainc.com Designee for Jennifer Huckaba, Project Manager II ()0-0 jennifer.huckaba@testamericainc.com The test results in this report meet all 00 NELAC and 00 TNI requirements for accredited parameters, 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 Manager at the address or telephone number listed on this page. This report has been electronically signed and authorized by the signatory. Electronic signature is intended 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.

248 Client: AECOM Project/Site:.Hampstead.EL (MD) Table of Contents TestAmerica Job ID: 0-0- Cover Page Table of Contents Sample Summary Case Narrative Definitions Client Sample Results QC Sample Results QC Association Chronicle Method Summary Certification Summary Chain of Custody Page of //0

249 Client: AECOM Project/Site:.Hampstead.EL (MD) Sample Summary TestAmerica Job ID: 0-0- Lab Sample ID Client Sample ID Matrix Collected Received 0-0- Hanover Pike Water 0/0/ : 0/0/ : Page of //0

250 Case Narrative Client: AECOM TestAmerica Job ID: 0-0- Project/Site:.Hampstead.EL (MD) Job ID: 0-0- Laboratory: Narrative Comments No additional comments. Job Narrative 0-0- Receipt The sample was received on //0 : AM; the sample arrived in good condition, properly preserved and, where required, on ice. The temperature of the cooler at receipt was.º C. GC/MS VOA Method(s).: The laboratory control sample (LCS) and / or laboratory control sample duplicate (LCSD) for analytical batch 0- recovered outside control limits for the following analytes: Bromomethane and Naphthalene. These analytes were biased high in the LCS and were not detected in the associated samples; therefore, the data have been reported. No additional analytical or quality issues were noted, other than those described above or in the Definitions/Glossary page. Page of //0

251 Client: AECOM Project/Site:.Hampstead.EL (MD) Definitions/Glossary TestAmerica Job ID: 0-0- Qualifiers GC/MS VOA Qualifier Qualifier Description * LCS or LCSD is outside acceptance limits. Glossary Abbreviation 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 %R Percent Recovery CFL Contains Free Liquid CNF Contains No Free Liquid DER Duplicate Error Ratio (normalized absolute difference) 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 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) Page of //0

252 Client: AECOM Project/Site:.Hampstead.EL (MD) Client Sample ID: Hanover Pike Date Collected: 0/0/ : Date Received: 0/0/ : Method:. - Volatile Organic Compounds (GC/MS) Client Sample Results RL MDL TestAmerica Job ID: 0-0- Lab Sample ID: 0-0- Benzene 0.00 ug/l 0/0/ : Bromobenzene Bromochloromethane Bromodichloromethane Bromoform Bromomethane * Carbon disulfide Carbon tetrachloride Chlorobenzene Chlorodibromomethane Chloroethane Chloroform Chloromethane -Chlorotoluene -Chlorotoluene cis-,-dichloroethene cis-,-dichloropropene,-dibromo--chloropropane,-dibromoethane (EDB) Dibromomethane,-Dichlorobenzene,-Dichlorobenzene,-Dichlorobenzene Dichlorodifluoromethane,-Dichloroethane,-Dichloroethane,-Dichloroethene,-Dichloropropane,-Dichloropropane,-Dichloropropane,-Dichloropropene Diisopropyl ether Ethylbenzene Ethyl tert-butyl ether Hexachlorobutadiene Isopropylbenzene Methylene Chloride Methyl tert-butyl ether Naphthalene * n-butylbenzene N-Propylbenzene p-isopropyltoluene sec-butylbenzene Styrene Tert-amyl methyl ether tert-butyl alcohol tert-butylbenzene,,,-tetrachloroethane,,,-tetrachloroethane Unit D 0.00 ug/l 0/0/ : 0.00 ug/l 0/0/ : 0.00 ug/l 0/0/ : 0.00 ug/l 0/0/ : 0.00 ug/l 0/0/ : 0.00 ug/l 0/0/ : 0.00 ug/l 0/0/ : 0.00 ug/l 0/0/ : 0.00 ug/l 0/0/ : 0.00 ug/l 0/0/ : 0.00 ug/l 0/0/ : 0.00 ug/l 0/0/ : 0.00 ug/l 0/0/ : 0.00 ug/l 0/0/ : 0.00 ug/l 0/0/ : 0.00 ug/l 0/0/ :.00 ug/l 0/0/ : 0.00 ug/l 0/0/ : 0.00 ug/l 0/0/ : 0.00 ug/l 0/0/ : 0.00 ug/l 0/0/ : 0.00 ug/l 0/0/ : 0.00 ug/l 0/0/ : 0.00 ug/l 0/0/ : 0.00 ug/l 0/0/ : 0.00 ug/l 0/0/ : 0.00 ug/l 0/0/ : 0.00 ug/l 0/0/ : 0.00 ug/l 0/0/ : 0.00 ug/l 0/0/ : 0.00 ug/l 0/0/ : 0.00 ug/l 0/0/ : 0.00 ug/l 0/0/ : 0.00 ug/l 0/0/ : 0.00 ug/l 0/0/ :.00 ug/l 0/0/ : 0.00 ug/l 0/0/ :.00 ug/l 0/0/ : 0.00 ug/l 0/0/ : 0.00 ug/l 0/0/ : 0.00 ug/l 0/0/ : 0.00 ug/l 0/0/ : 0.00 ug/l 0/0/ : 0.00 ug/l 0/0/ :.0 ug/l 0/0/ : 0.00 ug/l 0/0/ : 0.00 ug/l 0/0/ : 0.00 ug/l 0/0/ : Page of //0

253 Client: AECOM Project/Site:.Hampstead.EL (MD) Client Sample ID: Hanover Pike Date Collected: 0/0/ : Date Received: 0/0/ : Client Sample Results Method:. - Volatile Organic Compounds (GC/MS) (Continued) RL MDL Unit TestAmerica Job ID: 0-0- Lab Sample ID: 0-0- Tetrachloroethene 0.00 ug/l 0/0/ : Toluene trans-,-dichloroethene trans-,-dichloropropene,,-trichlorobenzene,,-trichlorobenzene,,-trichloroethane,,-trichloroethane Trichloroethene Trichlorofluoromethane,,-Trichloropropane,,-Trimethylbenzene,,-Trimethylbenzene Vinyl chloride Xylenes, Total D 0.00 ug/l 0/0/ : 0.00 ug/l 0/0/ : 0.00 ug/l 0/0/ : 0.00 ug/l 0/0/ : 0.00 ug/l 0/0/ : 0.00 ug/l 0/0/ : 0.00 ug/l 0/0/ : 0.00 ug/l 0/0/ : 0.00 ug/l 0/0/ : 0.00 ug/l 0/0/ : 0.00 ug/l 0/0/ : 0.00 ug/l 0/0/ : 0.00 ug/l 0/0/ :.00 ug/l 0/0/ : Surrogate %Recovery Qualifier -Bromofluorobenzene (Surr) 0-0 0/0/ : Dibromofluoromethane (Surr) 0-0 0/0/ :,-Dichloroethane-d (Surr) 0-0 0/0/ : Toluene-d (Surr) 0-0 0/0/ : Page of //0

254 Client: AECOM Project/Site:.Hampstead.EL (MD) QC Sample Results Method:. - Volatile Organic Compounds (GC/MS) Lab Sample ID: MB 0-/ Analysis Batch: MB MB RL MDL TestAmerica Job ID: 0-0- Client Sample ID: Method Blank Prep Type: Total/NA Benzene 0.00 ug/l 0/0/ : Bromobenzene Bromochloromethane Bromodichloromethane Bromoform Bromomethane Carbon disulfide Carbon tetrachloride Chlorobenzene Chlorodibromomethane Chloroethane Chloroform Chloromethane -Chlorotoluene -Chlorotoluene cis-,-dichloroethene cis-,-dichloropropene,-dibromo--chloropropane,-dibromoethane (EDB) Dibromomethane,-Dichlorobenzene,-Dichlorobenzene,-Dichlorobenzene Dichlorodifluoromethane,-Dichloroethane,-Dichloroethane,-Dichloroethene,-Dichloropropane,-Dichloropropane,-Dichloropropane,-Dichloropropene Diisopropyl ether Ethylbenzene Ethyl tert-butyl ether Hexachlorobutadiene Isopropylbenzene Methylene Chloride Methyl tert-butyl ether Naphthalene n-butylbenzene N-Propylbenzene p-isopropyltoluene sec-butylbenzene Styrene Tert-amyl methyl ether tert-butyl alcohol tert-butylbenzene,,,-tetrachloroethane Unit D 0.00 ug/l 0/0/ : 0.00 ug/l 0/0/ : 0.00 ug/l 0/0/ : 0.00 ug/l 0/0/ : 0.00 ug/l 0/0/ : 0.00 ug/l 0/0/ : 0.00 ug/l 0/0/ : 0.00 ug/l 0/0/ : 0.00 ug/l 0/0/ : 0.00 ug/l 0/0/ : 0.00 ug/l 0/0/ : 0.00 ug/l 0/0/ : 0.00 ug/l 0/0/ : 0.00 ug/l 0/0/ : 0.00 ug/l 0/0/ : 0.00 ug/l 0/0/ :.00 ug/l 0/0/ : 0.00 ug/l 0/0/ : 0.00 ug/l 0/0/ : 0.00 ug/l 0/0/ : 0.00 ug/l 0/0/ : 0.00 ug/l 0/0/ : 0.00 ug/l 0/0/ : 0.00 ug/l 0/0/ : 0.00 ug/l 0/0/ : 0.00 ug/l 0/0/ : 0.00 ug/l 0/0/ : 0.00 ug/l 0/0/ : 0.00 ug/l 0/0/ : 0.00 ug/l 0/0/ : 0.00 ug/l 0/0/ : 0.00 ug/l 0/0/ : 0.00 ug/l 0/0/ : 0.00 ug/l 0/0/ : 0.00 ug/l 0/0/ :.00 ug/l 0/0/ : 0.00 ug/l 0/0/ :.00 ug/l 0/0/ : 0.00 ug/l 0/0/ : 0.00 ug/l 0/0/ : 0.00 ug/l 0/0/ : 0.00 ug/l 0/0/ : 0.00 ug/l 0/0/ : 0.00 ug/l 0/0/ :.0 ug/l 0/0/ : 0.00 ug/l 0/0/ : 0.00 ug/l 0/0/ : Page of //0

255 Client: AECOM Project/Site:.Hampstead.EL (MD) QC Sample Results Method:. - Volatile Organic Compounds (GC/MS) (Continued) Lab Sample ID: MB 0-/ Analysis Batch: MB MB RL MDL TestAmerica Job ID: 0-0- Client Sample ID: Method Blank Prep Type: Total/NA,,,-Tetrachloroethane 0.00 ug/l 0/0/ : Tetrachloroethene Toluene trans-,-dichloroethene trans-,-dichloropropene,,-trichlorobenzene,,-trichlorobenzene,,-trichloroethane,,-trichloroethane Trichloroethene Trichlorofluoromethane,,-Trichloropropane,,-Trimethylbenzene,,-Trimethylbenzene Vinyl chloride Xylenes, Total Unit D 0.00 ug/l 0/0/ : 0.00 ug/l 0/0/ : 0.00 ug/l 0/0/ : 0.00 ug/l 0/0/ : 0.00 ug/l 0/0/ : 0.00 ug/l 0/0/ : 0.00 ug/l 0/0/ : 0.00 ug/l 0/0/ : 0.00 ug/l 0/0/ : 0.00 ug/l 0/0/ : 0.00 ug/l 0/0/ : 0.00 ug/l 0/0/ : 0.00 ug/l 0/0/ : 0.00 ug/l 0/0/ :.00 ug/l 0/0/ : Surrogate %Recovery MB MB Qualifier -Bromofluorobenzene (Surr) 0-0 0/0/ : Dibromofluoromethane (Surr) 0-0 0/0/ :,-Dichloroethane-d (Surr) 0-0 0/0/ : Toluene-d (Surr) /0/ : Lab Sample ID: LCS 0-/ Analysis Batch: Spike Added LCS LCS Client Sample ID: Lab Control Sample Prep Type: Total/NA Benzene.00.0 ug/l 0-0 Bromobenzene.00. ug/l 0-0 Bromochloromethane.00. ug/l 0-0 Bromodichloromethane.00. ug/l 0-0 Bromoform.00. ug/l 0-0 Bromomethane.00. * ug/l 0-0 Carbon disulfide.00. ug/l 0-0 Carbon tetrachloride.00.0 ug/l 0-0 Chlorobenzene.00. ug/l 0-0 Chlorodibromomethane.00. ug/l Chloroethane.00. ug/l 0-0 Chloroform.00. ug/l 0-0 Chloromethane.00. ug/l 0-0 -Chlorotoluene.00. ug/l 0-0 -Chlorotoluene.00. ug/l 0-0 cis-,-dichloroethene.00. ug/l 0-0 cis-,-dichloropropene.00.0 ug/l 0-0,-Dibromo--Chloropropane ug/l 0 0-0,-Dibromoethane (EDB).00. ug/l 0-0 Dibromomethane.00. ug/l 0-0 Unit D %Rec %Rec. Page of //0

256 Client: AECOM Project/Site:.Hampstead.EL (MD) QC Sample Results Method:. - Volatile Organic Compounds (GC/MS) (Continued) Lab Sample ID: LCS 0-/ Analysis Batch: Spike Added LCS LCS TestAmerica Job ID: 0-0- Client Sample ID: Lab Control Sample Prep Type: Total/NA,-Dichlorobenzene.00. ug/l 0-0,-Dichlorobenzene.00. ug/l 0-0,-Dichlorobenzene.00. ug/l 0-0 Dichlorodifluoromethane.00. ug/l 0-0,-Dichloroethane.00.0 ug/l 0-0,-Dichloroethane.00. ug/l 0-0,-Dichloroethene.00. ug/l 0-0,-Dichloropropane.00. ug/l 0-0,-Dichloropropane.00. ug/l 0-0,-Dichloropropane.00.0 ug/l 0-0,-Dichloropropene.00.0 ug/l 0-0 Diisopropyl ether.00. ug/l 0-0 Ethylbenzene.00.0 ug/l 0-0 Ethyl tert-butyl ether.00. ug/l 0-0 Hexachlorobutadiene.00.0 ug/l 0-0 Isopropylbenzene.00. ug/l 0-0 Methylene Chloride.00. ug/l 0-0 Methyl tert-butyl ether.00.0 ug/l 0-0 Naphthalene.00. * ug/l 0-0 n-butylbenzene.00. ug/l 0-0 N-Propylbenzene.00. ug/l 0-0 p-isopropyltoluene.00.0 ug/l 0-0 sec-butylbenzene.00. ug/l 0-0 Styrene.00. ug/l 0-0 Tert-amyl methyl ether.00. ug/l 0-0 tert-butyl alcohol 0.0. ug/l 0-0 tert-butylbenzene.00. ug/l 0-0,,,-Tetrachloroethane.00.0 ug/l 0-0,,,-Tetrachloroethane.00.0 ug/l 0-0 Tetrachloroethene.00. ug/l 0-0 Toluene.00. ug/l trans-,-dichloroethene.00. ug/l 0-0 trans-,-dichloropropene.00.0 ug/l 0-0,,-Trichlorobenzene.00.0 ug/l 0-0,,-Trichlorobenzene.00. ug/l 0-0,,-Trichloroethane.00. ug/l 0-0,,-Trichloroethane.00.0 ug/l Trichloroethene.00.0 ug/l 0-0 Trichlorofluoromethane.00.0 ug/l 0-0,,-Trichloropropane.00. ug/l 0-0,,-Trimethylbenzene.00. ug/l 0-0,,-Trimethylbenzene.00. ug/l 0-0 Vinyl chloride.00. ug/l 0-0 Xylenes, Total.0. ug/l 0-0 Unit D %Rec %Rec. Surrogate %Recovery LCS LCS Qualifier -Bromofluorobenzene (Surr) 0-0 Dibromofluoromethane (Surr) 0-0 Page of //0

257 Client: AECOM Project/Site:.Hampstead.EL (MD) QC Sample Results Method:. - Volatile Organic Compounds (GC/MS) (Continued) Lab Sample ID: LCS 0-/ Analysis Batch: Surrogate %Recovery LCS LCS Qualifier,-Dichloroethane-d (Surr) 0-0 Toluene-d (Surr) Lab Sample ID: LCSD 0-/ Analysis Batch: Spike Added LCSD LCSD TestAmerica Job ID: 0-0- Client Sample ID: Lab Control Sample Prep Type: Total/NA Client Sample ID: Lab Control Sample Dup Prep Type: Total/NA Benzene.00.0 ug/l Bromobenzene.00. ug/l Bromochloromethane.00. ug/l Bromodichloromethane.00.0 ug/l Bromoform.00.0 ug/l Bromomethane.00. * ug/l Carbon disulfide.00. ug/l Carbon tetrachloride.00. ug/l Chlorobenzene.00. ug/l Chlorodibromomethane.00.0 ug/l Chloroethane.00. ug/l Chloroform.00. ug/l Chloromethane.00.0 ug/l Chlorotoluene.00. ug/l Chlorotoluene.00. ug/l cis-,-dichloroethene.00. ug/l cis-,-dichloropropene.00. ug/l 0-0 0,-Dibromo--Chloropropane.00. ug/l 0-0 0,-Dibromoethane (EDB).00. ug/l Dibromomethane.00. ug/l ,-Dichlorobenzene.00. ug/l 0-0 0,-Dichlorobenzene.00. ug/l 0-0 0,-Dichlorobenzene.00. ug/l Dichlorodifluoromethane.00. ug/l 0-0 0,-Dichloroethane.00. ug/l 0-0 0,-Dichloroethane.00.0 ug/l 0-0 0,-Dichloroethene.00. ug/l 0-0 0,-Dichloropropane.00.0 ug/l 0-0 0,-Dichloropropane.00. ug/l 0-0 0,-Dichloropropane.00. ug/l 0-0 0,-Dichloropropene.00. ug/l Diisopropyl ether.00.0 ug/l Ethylbenzene.00.0 ug/l Ethyl tert-butyl ether.00. ug/l Hexachlorobutadiene.00. ug/l Isopropylbenzene.00. ug/l Methylene Chloride.00.0 ug/l Methyl tert-butyl ether.00.0 ug/l Naphthalene.00. ug/l n-butylbenzene.00.0 ug/l Unit D %Rec %Rec. RPD RPD Limit Page of //0

258 Client: AECOM Project/Site:.Hampstead.EL (MD) QC Sample Results Method:. - Volatile Organic Compounds (GC/MS) (Continued) Lab Sample ID: LCSD 0-/ Analysis Batch: Spike Added LCSD LCSD TestAmerica Job ID: 0-0- Client Sample ID: Lab Control Sample Dup Prep Type: Total/NA N-Propylbenzene.00. ug/l p-isopropyltoluene.00. ug/l sec-butylbenzene.00.0 ug/l Styrene.00. ug/l Tert-amyl methyl ether.00. ug/l tert-butyl alcohol 0.0. ug/l tert-butylbenzene.00. ug/l 0-0 0,,,-Tetrachloroethane.00. ug/l 0-0 0,,,-Tetrachloroethane.00. ug/l Tetrachloroethene.00. ug/l Toluene.00. ug/l trans-,-dichloroethene.00. ug/l trans-,-dichloropropene.00. ug/l ,,-Trichlorobenzene.00. ug/l 0-0 0,,-Trichlorobenzene.00. ug/l 0-0 0,,-Trichloroethane.00. ug/l 0-0 0,,-Trichloroethane.00. ug/l Trichloroethene.00. ug/l Trichlorofluoromethane.00. ug/l 0-0 0,,-Trichloropropane.00. ug/l 0-0 0,,-Trimethylbenzene.00. ug/l 0-0 0,,-Trimethylbenzene.00. ug/l Vinyl chloride.00. ug/l Xylenes, Total.0. ug/l Unit D %Rec %Rec. RPD RPD Limit Surrogate LCSD LCSD %Recovery Qualifier -Bromofluorobenzene (Surr) 0-0 Dibromofluoromethane (Surr) 0-0,-Dichloroethane-d (Surr) 0-0 Toluene-d (Surr) 0-0 Page of //0

259 Client: AECOM Project/Site:.Hampstead.EL (MD) QC Association Summary TestAmerica Job ID: 0-0- GC/MS VOA Analysis Batch: Lab Sample ID Client Sample ID Prep Type Matrix Method Prep Batch 0-0- Hanover Pike Total/NA Water. MB 0-/ Method Blank Total/NA LCS 0-/ Lab Control Sample Total/NA LCSD 0-/ Lab Control Sample Dup Total/NA Water. Water. Water. Page of //0

260 Lab Chronicle Client: AECOM TestAmerica Job ID: 0-0- Project/Site:.Hampstead.EL (MD) Client Sample ID: Hanover Pike Lab Sample ID: 0-0- Date Collected: 0/0/ : Date Received: 0/0/ : Prep Type Batch Type Batch Method Run Dil Factor or Analyst Total/NA Analysis. ml ml 0/0/ : NC TAL NSH Laboratory References: Initial Amount Final Amount TAL NSH =, 0 Foster Creighton Drive, Nashville, TN 0, TEL ()-0 Batch Number Lab Page of //0

261 Client: AECOM Project/Site:.Hampstead.EL (MD) Method Summary TestAmerica Job ID: 0-0- Method Method Description Protocol Laboratory. Volatile Organic Compounds (GC/MS) EPA-DW TAL NSH Protocol References: EPA-DW = "Methods For The Determination Of Organic Compounds In Drinking Water", EPA/00/-/0, December And Its Supplements. Laboratory References: TAL NSH =, 0 Foster Creighton Drive, Nashville, TN 0, TEL ()-0 Page of //0

262 Accreditation/Certification Summary Client: AECOM TestAmerica Job ID: 0-0- Project/Site:.Hampstead.EL (MD) Laboratory: Unless otherwise noted, all analytes for this laboratory were covered under each accreditation/certification below. Authority Program EPA Region Identification Number Expiration Date Maryland State Program 0-- The following analytes are included in this report, but accreditation/certification is not offered by the governing authority: Analysis Method Prep Method Matrix. Water,,,-Tetrachloroethane. Water,,,-Tetrachloroethane. Water,-Dichloroethane. Water,-Dichloropropene. Water,,-Trichlorobenzene. Water,,-Trichloropropane. Water,,-Trimethylbenzene. Water,-Dibromo--Chloropropane. Water,-Dibromoethane (EDB). Water,,-Trimethylbenzene. Water,-Dichlorobenzene. Water,-Dichloropropane. Water,-Dichloropropane. Water -Chlorotoluene. Water -Chlorotoluene. Water Bromobenzene. Water Bromochloromethane. Water Bromomethane. Water Carbon disulfide. Water Chloroethane. Water Chloromethane. Water cis-,-dichloropropene. Water Dibromomethane. Water Dichlorodifluoromethane. Water Diisopropyl ether. Water Ethyl tert-butyl ether. Water Hexachlorobutadiene. Water Isopropylbenzene. Water Methyl tert-butyl ether. Water Naphthalene. Water n-butylbenzene. Water N-Propylbenzene. Water p-isopropyltoluene. Water sec-butylbenzene. Water Tert-amyl methyl ether. Water tert-butyl alcohol. Water tert-butylbenzene. Water trans-,-dichloropropene. Water Trichlorofluoromethane Page of //0

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264 Page of //0

265 ANALYTICAL REPORT TestAmerica Laboratories, Inc. 0 Foster Creighton Drive Nashville, TN 0 Tel: ()-0 TestAmerica Job ID: 0-- TestAmerica SDG: Hanover Pike, Hampstead, MD Client Project/Site:.Hampstead.EL (MD) For: AECOM 000 Virginia Manor Road Suite Beltsville, Maryland 00 Attn: Mr. John Canzeri Authorized for release by: //0 :: PM Jennifer Huckaba, Project Manager II ()0-0 jennifer.huckaba@testamericainc.com The test results in this report meet all 00 NELAC and 00 TNI requirements for accredited parameters, 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 Manager at the address or telephone number listed on this page. This report has been electronically signed and authorized by the signatory. Electronic signature is intended 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.

266 Client: AECOM Project/Site:.Hampstead.EL (MD) Table of Contents TestAmerica Job ID: 0-- SDG: Hanover Pike, Hampstead, MD Cover Page Table of Contents Sample Summary Case Narrative Definitions Client Sample Results QC Association Chronicle Method Summary Certification Summary Chain of Custody Page of //0

267 Sample Summary Client: AECOM TestAmerica Job ID: 0-- Project/Site:.Hampstead.EL (MD) SDG: Hanover Pike, Hampstead, MD Lab Sample ID Client Sample ID Matrix Collected Received 0-- Hanover INF Water 0// :0 0// :0 0-- Hanover GAC- EFF Water 0// : 0// :0 0-- Hanover GAC- EFF Water 0// : 0// :0 0-- Hanover FINAL EFF (GAC FINAL) Water 0// : 0// :0 Page of //0

268 Case Narrative Client: AECOM TestAmerica Job ID: 0-- Project/Site:.Hampstead.EL (MD) SDG: Hanover Pike, Hampstead, MD Job ID: 0-- Laboratory: Narrative Comments No additional comments. Job Narrative 0-- Receipt The samples were received on //0 :0 AM; the samples arrived in good condition, properly preserved and, where required, on ice. The temperature of the cooler at receipt was.º C. GC/MS VOA Method(s).: The laboratory control sample (LCS) and laboratory control sample duplicate (LCSD) for analytical batch 0- recovered outside control limits for the following analytes: Methylene Chloride. These analytes were biased high in the LCS and were not detected in the associated samples; therefore, the data have been reported. No additional analytical or quality issues were noted, other than those described above or in the Definitions/Glossary page. Page of //0

269 Definitions/Glossary Client: AECOM TestAmerica Job ID: 0-- Project/Site:.Hampstead.EL (MD) SDG: Hanover Pike, Hampstead, MD Qualifiers GC/MS VOA Qualifier Qualifier Description * LCS or LCSD is outside acceptance limits. Glossary Abbreviation 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 %R Percent Recovery CFL Contains Free Liquid CNF Contains No Free Liquid DER Duplicate Error Ratio (normalized absolute difference) 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 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) Page of //0

270 Client: AECOM Project/Site:.Hampstead.EL (MD) Client Sample ID: Hanover INF Date Collected: 0// :0 Date Received: 0// :0 Method:. - Volatile Organic Compounds (GC/MS) Client Sample Results RL MDL TestAmerica Job ID: 0-- SDG: Hanover Pike, Hampstead, MD Lab Sample ID: 0-- Benzene 0.00 ug/l 0// : Bromobenzene Bromochloromethane Bromodichloromethane Bromoform Bromomethane Carbon disulfide Carbon tetrachloride Chlorobenzene Chlorodibromomethane Chloroethane Chloroform Chloromethane -Chlorotoluene -Chlorotoluene cis-,-dichloroethene cis-,-dichloropropene,-dibromo--chloropropane,-dibromoethane (EDB) Dibromomethane,-Dichlorobenzene,-Dichlorobenzene,-Dichlorobenzene Dichlorodifluoromethane,-Dichloroethane,-Dichloroethane,-Dichloroethene,-Dichloropropane,-Dichloropropane,-Dichloropropane,-Dichloropropene Diisopropyl ether Ethylbenzene Ethyl tert-butyl ether Hexachlorobutadiene Isopropylbenzene Methylene Chloride * Methyl tert-butyl ether Naphthalene n-butylbenzene N-Propylbenzene p-isopropyltoluene sec-butylbenzene Styrene Tert-amyl methyl ether tert-butyl alcohol tert-butylbenzene,,,-tetrachloroethane,,,-tetrachloroethane Unit D 0.00 ug/l 0// : 0.00 ug/l 0// : 0.00 ug/l 0// : 0.00 ug/l 0// : 0.00 ug/l 0// : 0.00 ug/l 0// : 0.00 ug/l 0// : 0.00 ug/l 0// : 0.00 ug/l 0// : 0.00 ug/l 0// : 0.00 ug/l 0// : 0.00 ug/l 0// : 0.00 ug/l 0// : 0.00 ug/l 0// : 0.00 ug/l 0// : 0.00 ug/l 0// :.00 ug/l 0// : 0.00 ug/l 0// : 0.00 ug/l 0// : 0.00 ug/l 0// : 0.00 ug/l 0// : 0.00 ug/l 0// : 0.00 ug/l 0// : 0.00 ug/l 0// : 0.00 ug/l 0// : 0.00 ug/l 0// : 0.00 ug/l 0// : 0.00 ug/l 0// : 0.00 ug/l 0// : 0.00 ug/l 0// : 0.00 ug/l 0// : 0.00 ug/l 0// : 0.00 ug/l 0// : 0.00 ug/l 0// : 0.00 ug/l 0// :.00 ug/l 0// : 0.00 ug/l 0// :.00 ug/l 0// : 0.00 ug/l 0// : 0.00 ug/l 0// : 0.00 ug/l 0// : 0.00 ug/l 0// : 0.00 ug/l 0// : 0.00 ug/l 0// :.0 ug/l 0// : 0.00 ug/l 0// : 0.00 ug/l 0// : 0.00 ug/l 0// : Page of //0

271 Client: AECOM Project/Site:.Hampstead.EL (MD) Client Sample ID: Hanover INF Date Collected: 0// :0 Date Received: 0// :0 Client Sample Results Method:. - Volatile Organic Compounds (GC/MS) (Continued) RL MDL Unit TestAmerica Job ID: 0-- SDG: Hanover Pike, Hampstead, MD Lab Sample ID: 0-- Tetrachloroethene 0.00 ug/l 0// : Toluene trans-,-dichloroethene trans-,-dichloropropene,,-trichlorobenzene,,-trichlorobenzene,,-trichloroethane,,-trichloroethane Trichloroethene Trichlorofluoromethane,,-Trichloropropane,,-Trimethylbenzene,,-Trimethylbenzene Vinyl chloride Xylenes, Total D 0.00 ug/l 0// : 0.00 ug/l 0// : 0.00 ug/l 0// : 0.00 ug/l 0// : 0.00 ug/l 0// : 0.00 ug/l 0// : 0.00 ug/l 0// : 0.00 ug/l 0// : 0.00 ug/l 0// : 0.00 ug/l 0// : 0.00 ug/l 0// : 0.00 ug/l 0// : 0.00 ug/l 0// :.00 ug/l 0// : Surrogate %Recovery Qualifier -Bromofluorobenzene (Surr) 0-0 0// : Dibromofluoromethane (Surr) 0-0 0// :,-Dichloroethane-d (Surr) 0-0 0// : Toluene-d (Surr) 0-0 0// : Page of //0

272 Client: AECOM Project/Site:.Hampstead.EL (MD) Client Sample ID: Hanover GAC- EFF Date Collected: 0// : Date Received: 0// :0 Method:. - Volatile Organic Compounds (GC/MS) Client Sample Results RL MDL TestAmerica Job ID: 0-- SDG: Hanover Pike, Hampstead, MD Lab Sample ID: 0-- Benzene 0.00 ug/l 0// : Bromobenzene Bromochloromethane Bromodichloromethane Bromoform Bromomethane Carbon disulfide Carbon tetrachloride Chlorobenzene Chlorodibromomethane Chloroethane Chloroform Chloromethane -Chlorotoluene -Chlorotoluene cis-,-dichloroethene cis-,-dichloropropene,-dibromo--chloropropane,-dibromoethane (EDB) Dibromomethane,-Dichlorobenzene,-Dichlorobenzene,-Dichlorobenzene Dichlorodifluoromethane,-Dichloroethane,-Dichloroethane,-Dichloroethene,-Dichloropropane,-Dichloropropane,-Dichloropropane,-Dichloropropene Diisopropyl ether Ethylbenzene Ethyl tert-butyl ether Hexachlorobutadiene Isopropylbenzene Methylene Chloride * Methyl tert-butyl ether. Naphthalene n-butylbenzene N-Propylbenzene p-isopropyltoluene sec-butylbenzene Styrene Tert-amyl methyl ether tert-butyl alcohol tert-butylbenzene,,,-tetrachloroethane,,,-tetrachloroethane Unit D 0.00 ug/l 0// : 0.00 ug/l 0// : 0.00 ug/l 0// : 0.00 ug/l 0// : 0.00 ug/l 0// : 0.00 ug/l 0// : 0.00 ug/l 0// : 0.00 ug/l 0// : 0.00 ug/l 0// : 0.00 ug/l 0// : 0.00 ug/l 0// : 0.00 ug/l 0// : 0.00 ug/l 0// : 0.00 ug/l 0// : 0.00 ug/l 0// : 0.00 ug/l 0// :.00 ug/l 0// : 0.00 ug/l 0// : 0.00 ug/l 0// : 0.00 ug/l 0// : 0.00 ug/l 0// : 0.00 ug/l 0// : 0.00 ug/l 0// : 0.00 ug/l 0// : 0.00 ug/l 0// : 0.00 ug/l 0// : 0.00 ug/l 0// : 0.00 ug/l 0// : 0.00 ug/l 0// : 0.00 ug/l 0// : 0.00 ug/l 0// : 0.00 ug/l 0// : 0.00 ug/l 0// : 0.00 ug/l 0// : 0.00 ug/l 0// :.00 ug/l 0// : 0.00 ug/l 0// :.00 ug/l 0// : 0.00 ug/l 0// : 0.00 ug/l 0// : 0.00 ug/l 0// : 0.00 ug/l 0// : 0.00 ug/l 0// : 0.00 ug/l 0// :.0 ug/l 0// : 0.00 ug/l 0// : 0.00 ug/l 0// : 0.00 ug/l 0// : Page of //0

273 Client: AECOM Project/Site:.Hampstead.EL (MD) Client Sample ID: Hanover GAC- EFF Date Collected: 0// : Date Received: 0// :0 Client Sample Results Method:. - Volatile Organic Compounds (GC/MS) (Continued) RL MDL Unit TestAmerica Job ID: 0-- SDG: Hanover Pike, Hampstead, MD Lab Sample ID: 0-- Tetrachloroethene 0.00 ug/l 0// : Toluene trans-,-dichloroethene trans-,-dichloropropene,,-trichlorobenzene,,-trichlorobenzene,,-trichloroethane,,-trichloroethane Trichloroethene Trichlorofluoromethane,,-Trichloropropane,,-Trimethylbenzene,,-Trimethylbenzene Vinyl chloride Xylenes, Total D 0.00 ug/l 0// : 0.00 ug/l 0// : 0.00 ug/l 0// : 0.00 ug/l 0// : 0.00 ug/l 0// : 0.00 ug/l 0// : 0.00 ug/l 0// : 0.00 ug/l 0// : 0.00 ug/l 0// : 0.00 ug/l 0// : 0.00 ug/l 0// : 0.00 ug/l 0// : 0.00 ug/l 0// :.00 ug/l 0// : Surrogate %Recovery Qualifier -Bromofluorobenzene (Surr) 0-0 0// : Dibromofluoromethane (Surr) 0-0 0// :,-Dichloroethane-d (Surr) 0-0 0// : Toluene-d (Surr) 0-0 0// : Page of //0

274 Client: AECOM Project/Site:.Hampstead.EL (MD) Client Sample ID: Hanover GAC- EFF Date Collected: 0// : Date Received: 0// :0 Method:. - Volatile Organic Compounds (GC/MS) Client Sample Results RL MDL TestAmerica Job ID: 0-- SDG: Hanover Pike, Hampstead, MD Lab Sample ID: 0-- Benzene 0.00 ug/l 0// : Bromobenzene Bromochloromethane Bromodichloromethane Bromoform Bromomethane Carbon disulfide Carbon tetrachloride Chlorobenzene Chlorodibromomethane Chloroethane Chloroform Chloromethane -Chlorotoluene -Chlorotoluene cis-,-dichloroethene cis-,-dichloropropene,-dibromo--chloropropane,-dibromoethane (EDB) Dibromomethane,-Dichlorobenzene,-Dichlorobenzene,-Dichlorobenzene Dichlorodifluoromethane,-Dichloroethane,-Dichloroethane,-Dichloroethene,-Dichloropropane,-Dichloropropane,-Dichloropropane,-Dichloropropene Diisopropyl ether Ethylbenzene Ethyl tert-butyl ether Hexachlorobutadiene Isopropylbenzene Methylene Chloride * Methyl tert-butyl ether Naphthalene n-butylbenzene N-Propylbenzene p-isopropyltoluene sec-butylbenzene Styrene Tert-amyl methyl ether tert-butyl alcohol tert-butylbenzene,,,-tetrachloroethane,,,-tetrachloroethane Unit D 0.00 ug/l 0// : 0.00 ug/l 0// : 0.00 ug/l 0// : 0.00 ug/l 0// : 0.00 ug/l 0// : 0.00 ug/l 0// : 0.00 ug/l 0// : 0.00 ug/l 0// : 0.00 ug/l 0// : 0.00 ug/l 0// : 0.00 ug/l 0// : 0.00 ug/l 0// : 0.00 ug/l 0// : 0.00 ug/l 0// : 0.00 ug/l 0// : 0.00 ug/l 0// :.00 ug/l 0// : 0.00 ug/l 0// : 0.00 ug/l 0// : 0.00 ug/l 0// : 0.00 ug/l 0// : 0.00 ug/l 0// : 0.00 ug/l 0// : 0.00 ug/l 0// : 0.00 ug/l 0// : 0.00 ug/l 0// : 0.00 ug/l 0// : 0.00 ug/l 0// : 0.00 ug/l 0// : 0.00 ug/l 0// : 0.00 ug/l 0// : 0.00 ug/l 0// : 0.00 ug/l 0// : 0.00 ug/l 0// : 0.00 ug/l 0// :.00 ug/l 0// : 0.00 ug/l 0// :.00 ug/l 0// : 0.00 ug/l 0// : 0.00 ug/l 0// : 0.00 ug/l 0// : 0.00 ug/l 0// : 0.00 ug/l 0// : 0.00 ug/l 0// :.0 ug/l 0// : 0.00 ug/l 0// : 0.00 ug/l 0// : 0.00 ug/l 0// : Page of //0

275 Client: AECOM Project/Site:.Hampstead.EL (MD) Client Sample ID: Hanover GAC- EFF Date Collected: 0// : Date Received: 0// :0 Client Sample Results Method:. - Volatile Organic Compounds (GC/MS) (Continued) RL MDL Unit TestAmerica Job ID: 0-- SDG: Hanover Pike, Hampstead, MD Lab Sample ID: 0-- Tetrachloroethene 0.00 ug/l 0// : Toluene trans-,-dichloroethene trans-,-dichloropropene,,-trichlorobenzene,,-trichlorobenzene,,-trichloroethane,,-trichloroethane Trichloroethene Trichlorofluoromethane,,-Trichloropropane,,-Trimethylbenzene,,-Trimethylbenzene Vinyl chloride Xylenes, Total D 0.00 ug/l 0// : 0.00 ug/l 0// : 0.00 ug/l 0// : 0.00 ug/l 0// : 0.00 ug/l 0// : 0.00 ug/l 0// : 0.00 ug/l 0// : 0.00 ug/l 0// : 0.00 ug/l 0// : 0.00 ug/l 0// : 0.00 ug/l 0// : 0.00 ug/l 0// : 0.00 ug/l 0// :.00 ug/l 0// : Surrogate %Recovery Qualifier -Bromofluorobenzene (Surr) 0-0 0// : Dibromofluoromethane (Surr) 0-0 0// :,-Dichloroethane-d (Surr) 0-0 0// : Toluene-d (Surr) 0-0 0// : Page of //0

276 Client: AECOM Project/Site:.Hampstead.EL (MD) Client Sample Results Client Sample ID: Hanover FINAL EFF (GAC FINAL) Date Collected: 0// : Date Received: 0// :0 Method:. - Volatile Organic Compounds (GC/MS) RL MDL TestAmerica Job ID: 0-- SDG: Hanover Pike, Hampstead, MD Lab Sample ID: 0-- Benzene 0.00 ug/l 0// : Bromobenzene Bromochloromethane Bromodichloromethane Bromoform Bromomethane Carbon disulfide Carbon tetrachloride Chlorobenzene Chlorodibromomethane Chloroethane Chloroform Chloromethane -Chlorotoluene -Chlorotoluene cis-,-dichloroethene cis-,-dichloropropene,-dibromo--chloropropane,-dibromoethane (EDB) Dibromomethane,-Dichlorobenzene,-Dichlorobenzene,-Dichlorobenzene Dichlorodifluoromethane,-Dichloroethane,-Dichloroethane,-Dichloroethene,-Dichloropropane,-Dichloropropane,-Dichloropropane,-Dichloropropene Diisopropyl ether Ethylbenzene Ethyl tert-butyl ether Hexachlorobutadiene Isopropylbenzene Methylene Chloride * Methyl tert-butyl ether Naphthalene n-butylbenzene N-Propylbenzene p-isopropyltoluene sec-butylbenzene Styrene Tert-amyl methyl ether tert-butyl alcohol tert-butylbenzene,,,-tetrachloroethane,,,-tetrachloroethane Unit D 0.00 ug/l 0// : 0.00 ug/l 0// : 0.00 ug/l 0// : 0.00 ug/l 0// : 0.00 ug/l 0// : 0.00 ug/l 0// : 0.00 ug/l 0// : 0.00 ug/l 0// : 0.00 ug/l 0// : 0.00 ug/l 0// : 0.00 ug/l 0// : 0.00 ug/l 0// : 0.00 ug/l 0// : 0.00 ug/l 0// : 0.00 ug/l 0// : 0.00 ug/l 0// :.00 ug/l 0// : 0.00 ug/l 0// : 0.00 ug/l 0// : 0.00 ug/l 0// : 0.00 ug/l 0// : 0.00 ug/l 0// : 0.00 ug/l 0// : 0.00 ug/l 0// : 0.00 ug/l 0// : 0.00 ug/l 0// : 0.00 ug/l 0// : 0.00 ug/l 0// : 0.00 ug/l 0// : 0.00 ug/l 0// : 0.00 ug/l 0// : 0.00 ug/l 0// : 0.00 ug/l 0// : 0.00 ug/l 0// : 0.00 ug/l 0// :.00 ug/l 0// : 0.00 ug/l 0// :.00 ug/l 0// : 0.00 ug/l 0// : 0.00 ug/l 0// : 0.00 ug/l 0// : 0.00 ug/l 0// : 0.00 ug/l 0// : 0.00 ug/l 0// :.0 ug/l 0// : 0.00 ug/l 0// : 0.00 ug/l 0// : 0.00 ug/l 0// : Page of //0

277 Client: AECOM Project/Site:.Hampstead.EL (MD) Client Sample Results Client Sample ID: Hanover FINAL EFF (GAC FINAL) Date Collected: 0// : Date Received: 0// :0 Method:. - Volatile Organic Compounds (GC/MS) (Continued) RL MDL Unit TestAmerica Job ID: 0-- SDG: Hanover Pike, Hampstead, MD Lab Sample ID: 0-- Tetrachloroethene 0.00 ug/l 0// : Toluene trans-,-dichloroethene trans-,-dichloropropene,,-trichlorobenzene,,-trichlorobenzene,,-trichloroethane,,-trichloroethane Trichloroethene Trichlorofluoromethane,,-Trichloropropane,,-Trimethylbenzene,,-Trimethylbenzene Vinyl chloride Xylenes, Total D 0.00 ug/l 0// : 0.00 ug/l 0// : 0.00 ug/l 0// : 0.00 ug/l 0// : 0.00 ug/l 0// : 0.00 ug/l 0// : 0.00 ug/l 0// : 0.00 ug/l 0// : 0.00 ug/l 0// : 0.00 ug/l 0// : 0.00 ug/l 0// : 0.00 ug/l 0// : 0.00 ug/l 0// :.00 ug/l 0// : Surrogate %Recovery Qualifier -Bromofluorobenzene (Surr) 0-0 0// : Dibromofluoromethane (Surr) 0-0 0// :,-Dichloroethane-d (Surr) 0-0 0// : Toluene-d (Surr) 0-0 0// : Page of //0

278 Client: AECOM Project/Site:.Hampstead.EL (MD) GC/MS VOA Analysis Batch: QC Association Summary TestAmerica Job ID: 0-- SDG: Hanover Pike, Hampstead, MD Lab Sample ID Client Sample ID Prep Type Matrix Method Prep Batch 0-- Hanover INF Total/NA Water. 0-- Hanover GAC- EFF Total/NA 0-- Hanover GAC- EFF Total/NA 0-- Hanover FINAL EFF (GAC FINAL) Total/NA Water. Water. Water. Page of //0

279 Lab Chronicle Client: AECOM TestAmerica Job ID: 0-- Project/Site:.Hampstead.EL (MD) SDG: Hanover Pike, Hampstead, MD Client Sample ID: Hanover INF Lab Sample ID: 0-- Date Collected: 0// :0 Date Received: 0// :0 Prep Type Batch Type Batch Method Run Dil Factor or Analyst Total/NA Analysis. ml ml 0// : RP TAL NSH Initial Amount Final Amount Batch Number Client Sample ID: Hanover GAC- EFF Lab Sample ID: 0-- Date Collected: 0// : Date Received: 0// :0 Prep Type Batch Type Batch Method Run Dil Factor or Analyst Total/NA Analysis. ml ml 0// : RP TAL NSH Initial Amount Final Amount Batch Number Client Sample ID: Hanover GAC- EFF Lab Sample ID: 0-- Date Collected: 0// : Date Received: 0// :0 Lab Lab Batch Batch Dil Initial Final Batch Prep Type Type Method Run Factor Amount Amount Number or Analyst Lab Total/NA Analysis. ml ml 0// : RP TAL NSH Client Sample ID: Hanover FINAL EFF (GAC FINAL) Lab Sample ID: 0-- Date Collected: 0// : Date Received: 0// :0 Prep Type Batch Type Batch Method Run Dil Factor or Analyst Total/NA Analysis. ml ml 0// : RP TAL NSH Initial Amount Final Amount Batch Number Lab Laboratory References: TAL NSH =, 0 Foster Creighton Drive, Nashville, TN 0, TEL ()-0 Page of //0

280 Method Summary Client: AECOM TestAmerica Job ID: 0-- Project/Site:.Hampstead.EL (MD) SDG: Hanover Pike, Hampstead, MD Method Method Description Protocol Laboratory. Volatile Organic Compounds (GC/MS) EPA-DW TAL NSH Protocol References: EPA-DW = "Methods For The Determination Of Organic Compounds In Drinking Water", EPA/00/-/0, December And Its Supplements. Laboratory References: TAL NSH =, 0 Foster Creighton Drive, Nashville, TN 0, TEL ()-0 Page of //0

281 Accreditation/Certification Summary Client: AECOM TestAmerica Job ID: 0-- Project/Site:.Hampstead.EL (MD) SDG: Hanover Pike, Hampstead, MD Laboratory: Unless otherwise noted, all analytes for this laboratory were covered under each accreditation/certification below. Authority Program EPA Region Identification Number Expiration Date Maryland State Program 0-- 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. Water,,,-Tetrachloroethane. Water,,,-Tetrachloroethane. Water,-Dichloroethane. Water,-Dichloropropene. Water,,-Trichlorobenzene. Water,,-Trichloropropane. Water,,-Trimethylbenzene. Water,-Dibromo--Chloropropane. Water,-Dibromoethane (EDB). Water,,-Trimethylbenzene. Water,-Dichlorobenzene. Water,-Dichloropropane. Water,-Dichloropropane. Water -Chlorotoluene. Water -Chlorotoluene. Water Bromobenzene. Water Bromochloromethane. Water Bromomethane. Water Carbon disulfide. Water Chloroethane. Water Chloromethane. Water cis-,-dichloropropene. Water Dibromomethane. Water Dichlorodifluoromethane. Water Diisopropyl ether. Water Ethyl tert-butyl ether. Water Hexachlorobutadiene. Water Isopropylbenzene. Water Methyl tert-butyl ether. Water Naphthalene. Water n-butylbenzene. Water N-Propylbenzene. Water p-isopropyltoluene. Water sec-butylbenzene. Water Tert-amyl methyl ether. Water tert-butyl alcohol. Water tert-butylbenzene. Water trans-,-dichloropropene. Water Trichlorofluoromethane Page of //0

282 Page of //0

283 Page of //0

284 ATTACHMENT D Residential Treatment System Influent MTBE Concentrations Over Time

285 Potable Carbon Treatment System Influent MTBE Concentrations Over Time Hanover Pike, Hampstead, MD,00 Remediation System Activated on October, 0 MTBE,000 Concentration (ug/l),00, // // // // // // // // // // // Date

286 ATTACHMENT E Groundwater Drawdown Graphs (Pumping Wells)

287 August, 0, AECOM deactivated the remediation system MW- Depth To Water Over Time Depth to Water (feet) Groundwater Remediation System Activated // February, 0 Began deactivating and reactivating MW- and MW- pumps for two week periods //0 //0 //0 //0 //0 //0 /0/0 //0 //0 MW- MW- and MW- Deactivated MW- and MW- Reactivated Automated Pulsing in MW- and MW- Initiated System Deactivated and Began Rebound Assessment Date

288 MW- Depth to Water Over Time Groundwater Remediation System Activated (//) August, 0, AECOM deactivated the remediation system Depth to Water (feet) February, 0 Began deactivating and reactivating MW- and MW- pumps for two week periods // // // // // // /0/ // // MW- MW- and MW- Deactivated MW- and MW- Reactivated Automated Pulsing in MW- and MW- Initiated System Deactivated and Began Rebound Assessment Date

289 MW- Depth to Water Over Time Depth to Water (feet) Groundwater Remediation System Activated (//) August, 0, AECOM deactivated the remediation system February, 0 Began deactivating and reactivating MW- and MW- pumps for two week periods // // // // // // /0/ // // MW- MW- and MW- Deactivated MW- and MW- Reactivated Automated Pulsing in MW- and MW- Initiated System Deactivated and Began Rebound Assessment Date

290 ATTACHMENT F Groundwater Treatment System Laboratory Reports

291 ANALYTICAL REPORT TestAmerica Laboratories, Inc. 0 Foster Creighton Drive Nashville, TN 0 Tel: ()-0 TestAmerica Job ID: 0-- TestAmerica SDG: Hanover Pike, Hampstead, MD Client Project/Site:.Hampstead.EL (MD) For: AECOM 000 Virginia Manor Road Suite Beltsville, Maryland 00 Attn: Mr. John Canzeri Authorized for release by: //0 :: AM Leah Klingensmith, Senior Project Manager ()0-0 leah.klingensmith@testamericainc.com Designee for Jennifer Huckaba, Project Manager II ()0-0 jennifer.huckaba@testamericainc.com The test results in this report meet all 00 NELAC and 00 TNI requirements for accredited parameters, 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 Manager at the address or telephone number listed on this page. This report has been electronically signed and authorized by the signatory. Electronic signature is intended 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.

292 Client: AECOM Project/Site:.Hampstead.EL (MD) Table of Contents TestAmerica Job ID: 0-- SDG: Hanover Pike, Hampstead, MD Cover Page Table of Contents Sample Summary Case Narrative Definitions Client Sample Results QC Sample Results QC Association Chronicle Method Summary Certification Summary Chain of Custody Page of //0

293 Sample Summary Client: AECOM TestAmerica Job ID: 0-- Project/Site:.Hampstead.EL (MD) SDG: Hanover Pike, Hampstead, MD Lab Sample ID Client Sample ID Matrix Collected Received 0-- A/S INF Water 0// :0 0// :0 0-- A/S EFF Water 0// : 0// :0 0-- GAC- EFF Water 0// :0 0// :0 0-- GAC- Final Water 0// : 0// :0 0-- MW Water 0// :00 0// :0 0-- MW Water 0// :0 0// :0 0-- MW Water 0// : 0// :0 Page of //0

294 Case Narrative Client: AECOM TestAmerica Job ID: 0-- Project/Site:.Hampstead.EL (MD) SDG: Hanover Pike, Hampstead, MD Job ID: 0-- Laboratory: Narrative Comments No additional comments. Job Narrative 0-- Receipt The samples were received on //0 :0 AM; the samples arrived in good condition, properly preserved and, where required, on ice. The temperature of the cooler at receipt was.º C. GC/MS VOA No analytical or quality issues were noted, other than those described in the Definitions/Glossary page. GC VOA No analytical or quality issues were noted, other than those described in the Definitions/Glossary page. VOA Prep No analytical or quality issues were noted, other than those described in the Definitions/Glossary page. Page of //0

295 Definitions/Glossary Client: AECOM TestAmerica Job ID: 0-- Project/Site:.Hampstead.EL (MD) SDG: Hanover Pike, Hampstead, MD Glossary Abbreviation 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 %R Percent Recovery CFL Contains Free Liquid CNF Contains No Free Liquid DER Duplicate Error Ratio (normalized absolute difference) 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 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) Page of //0

296 Client: AECOM Project/Site:.Hampstead.EL (MD) Client Sample ID: A/S INF Date Collected: 0// :0 Date Received: 0// :0 Method: 0B - Volatile Organic Compounds (GC/MS) Client Sample Results RL MDL TestAmerica Job ID: 0-- SDG: Hanover Pike, Hampstead, MD Lab Sample ID: 0-- Benzene.00 ug/l 0/0/ 0:0 Ethylbenzene Methyl tert-butyl ether. Toluene Xylenes, Total Surrogate %Recovery Qualifier Unit D.00 ug/l 0/0/ 0:0.00 ug/l 0/0/ 0:0.00 ug/l 0/0/ 0:0.00 ug/l 0/0/ 0:0 Dibromofluoromethane (Surr) 0-0 0/0/ 0:0 Toluene-d (Surr) 0-0 0/0/ 0:0,-Dichloroethane-d (Surr) 0-0 0/0/ 0:0 -Bromofluorobenzene (Surr) 0-0 0/0/ 0:0 Method: 0C - Nonhalogenated Organics using GC/FID -Modified (Gasoline Range Organics) RL MDL Unit D Gasoline Range Organics [C - C] 0 ug/l 0// : Surrogate %Recovery Qualifier a,a,a-trifluorotoluene // : Page of //0

297 Client: AECOM Project/Site:.Hampstead.EL (MD) Client Sample ID: A/S EFF Date Collected: 0// : Date Received: 0// :0 Method: 0B - Volatile Organic Compounds (GC/MS) Client Sample Results RL MDL TestAmerica Job ID: 0-- SDG: Hanover Pike, Hampstead, MD Lab Sample ID: 0-- Benzene.00 ug/l 0/0/ 0: Ethylbenzene Methyl tert-butyl ether Toluene Xylenes, Total Surrogate %Recovery Qualifier Unit D.00 ug/l 0/0/ 0:.00 ug/l 0/0/ 0:.00 ug/l 0/0/ 0:.00 ug/l 0/0/ 0: Dibromofluoromethane (Surr) 0-0 0/0/ 0: Toluene-d (Surr) 0-0 0/0/ 0:,-Dichloroethane-d (Surr) 0-0 0/0/ 0: -Bromofluorobenzene (Surr) 0-0 0/0/ 0: Method: 0C - Nonhalogenated Organics using GC/FID -Modified (Gasoline Range Organics) RL MDL Unit D Gasoline Range Organics [C - C] 0 ug/l 0// : Surrogate %Recovery Qualifier a,a,a-trifluorotoluene // : Page of //0

298 Client: AECOM Project/Site:.Hampstead.EL (MD) Client Sample ID: GAC- EFF Date Collected: 0// :0 Date Received: 0// :0 Method: 0B - Volatile Organic Compounds (GC/MS) Client Sample Results RL MDL TestAmerica Job ID: 0-- SDG: Hanover Pike, Hampstead, MD Lab Sample ID: 0-- Benzene.00 ug/l 0/0/ 0: Ethylbenzene Methyl tert-butyl ether Toluene Xylenes, Total Surrogate %Recovery Qualifier Unit D.00 ug/l 0/0/ 0:.00 ug/l 0/0/ 0:.00 ug/l 0/0/ 0:.00 ug/l 0/0/ 0: Dibromofluoromethane (Surr) 0-0 0/0/ 0: Toluene-d (Surr) 0-0 0/0/ 0:,-Dichloroethane-d (Surr) 0-0 0/0/ 0: -Bromofluorobenzene (Surr) 0-0 0/0/ 0: Method: 0C - Nonhalogenated Organics using GC/FID -Modified (Gasoline Range Organics) RL MDL Unit D Gasoline Range Organics [C - C] 0 ug/l 0// : Surrogate %Recovery Qualifier a,a,a-trifluorotoluene // : Page of //0

299 Client: AECOM Project/Site:.Hampstead.EL (MD) Client Sample ID: GAC- Final Date Collected: 0// : Date Received: 0// :0 Method: 0B - Volatile Organic Compounds (GC/MS) Client Sample Results RL MDL TestAmerica Job ID: 0-- SDG: Hanover Pike, Hampstead, MD Lab Sample ID: 0-- Benzene.00 ug/l 0/0/ 0: Ethylbenzene Methyl tert-butyl ether Toluene Xylenes, Total Surrogate %Recovery Qualifier Unit D.00 ug/l 0/0/ 0:.00 ug/l 0/0/ 0:.00 ug/l 0/0/ 0:.00 ug/l 0/0/ 0: Dibromofluoromethane (Surr) 0-0 0/0/ 0: Toluene-d (Surr) 0-0 0/0/ 0:,-Dichloroethane-d (Surr) 0-0 0/0/ 0: -Bromofluorobenzene (Surr) 0-0 0/0/ 0: Method: 0C - Nonhalogenated Organics using GC/FID -Modified (Gasoline Range Organics) RL MDL Unit D Gasoline Range Organics [C - C] 0 ug/l 0// 0:0 Surrogate %Recovery Qualifier a,a,a-trifluorotoluene 0-0 0// 0:0 Page of //0

300 Client: AECOM Project/Site:.Hampstead.EL (MD) Client Sample ID: MW Date Collected: 0// :00 Date Received: 0// :0 Method: 0B - Volatile Organic Compounds (GC/MS) Client Sample Results RL MDL TestAmerica Job ID: 0-- SDG: Hanover Pike, Hampstead, MD Lab Sample ID: 0-- Benzene.00 ug/l 0/0/ 0: Ethylbenzene Methyl tert-butyl ether. Toluene Xylenes, Total Surrogate %Recovery Qualifier Unit D.00 ug/l 0/0/ 0:.00 ug/l 0/0/ 0:.00 ug/l 0/0/ 0:.00 ug/l 0/0/ 0: Dibromofluoromethane (Surr) 0-0 0/0/ 0: Toluene-d (Surr) 0-0 0/0/ 0:,-Dichloroethane-d (Surr) 0-0 0/0/ 0: -Bromofluorobenzene (Surr) 0-0 0/0/ 0: Method: 0C - Nonhalogenated Organics using GC/FID -Modified (Gasoline Range Organics) RL MDL Unit D Gasoline Range Organics [C - C] 0 ug/l 0// 0: Surrogate %Recovery Qualifier a,a,a-trifluorotoluene 0-0 0// 0: Page of //0

301 Client: AECOM Project/Site:.Hampstead.EL (MD) Client Sample ID: MW Date Collected: 0// :0 Date Received: 0// :0 Method: 0B - Volatile Organic Compounds (GC/MS) Client Sample Results RL MDL TestAmerica Job ID: 0-- SDG: Hanover Pike, Hampstead, MD Lab Sample ID: 0-- Benzene.00 ug/l 0/0/ 0: Ethylbenzene Methyl tert-butyl ether. Toluene Xylenes, Total Surrogate %Recovery Qualifier Unit D.00 ug/l 0/0/ 0:.00 ug/l 0/0/ 0:.00 ug/l 0/0/ 0:.00 ug/l 0/0/ 0: Dibromofluoromethane (Surr) 0-0 0/0/ 0: Toluene-d (Surr) 0-0 0/0/ 0:,-Dichloroethane-d (Surr) 0-0 0/0/ 0: -Bromofluorobenzene (Surr) 0-0 0/0/ 0: Method: 0C - Nonhalogenated Organics using GC/FID -Modified (Gasoline Range Organics) RL MDL Unit D Gasoline Range Organics [C - C] 0 ug/l 0// :0 Surrogate %Recovery Qualifier a,a,a-trifluorotoluene 0-0 0// :0 Page of //0

302 Client: AECOM Project/Site:.Hampstead.EL (MD) Client Sample ID: MW Date Collected: 0// : Date Received: 0// :0 Method: 0B - Volatile Organic Compounds (GC/MS) Client Sample Results RL MDL TestAmerica Job ID: 0-- SDG: Hanover Pike, Hampstead, MD Lab Sample ID: 0-- Benzene.00 ug/l 0/0/ :0 Ethylbenzene Methyl tert-butyl ether Toluene Xylenes, Total Surrogate %Recovery Qualifier Unit D.00 ug/l 0/0/ :0.00 ug/l 0/0/ :0.00 ug/l 0/0/ :0.00 ug/l 0/0/ :0 Dibromofluoromethane (Surr) 0-0 0/0/ :0 Toluene-d (Surr) 0-0 0/0/ :0,-Dichloroethane-d (Surr) 0-0 0/0/ :0 -Bromofluorobenzene (Surr) 0-0 0/0/ :0 Method: 0C - Nonhalogenated Organics using GC/FID -Modified (Gasoline Range Organics) RL MDL Unit D Gasoline Range Organics [C - C] 0 ug/l 0// : Surrogate %Recovery Qualifier a,a,a-trifluorotoluene 0-0 0// : Page of //0

303 Client: AECOM Project/Site:.Hampstead.EL (MD) QC Sample Results Method: 0B - Volatile Organic Compounds (GC/MS) Lab Sample ID: MB 0-0/ Analysis Batch: 0 MB MB RL MDL TestAmerica Job ID: 0-- SDG: Hanover Pike, Hampstead, MD Client Sample ID: Method Blank Prep Type: Total/NA Benzene.00 ug/l 0/0/ 0:0 Ethylbenzene Methyl tert-butyl ether Toluene Xylenes, Total Surrogate %Recovery Unit D.00 ug/l 0/0/ 0:0.00 ug/l 0/0/ 0:0.00 ug/l 0/0/ 0:0.00 ug/l 0/0/ 0:0 MB MB Qualifier Dibromofluoromethane (Surr) 0-0 0/0/ 0:0 Toluene-d (Surr) 0-0 0/0/ 0:0,-Dichloroethane-d (Surr) 0-0 0/0/ 0:0 -Bromofluorobenzene (Surr) 0-0 0/0/ 0:0 Lab Sample ID: LCS 0-0/ Analysis Batch: 0 Spike Added LCS LCS Client Sample ID: Lab Control Sample Prep Type: Total/NA Benzene 0.0. ug/l 0-0 Ethylbenzene 0.0. ug/l 0-0 Methyl tert-butyl ether 0.0. ug/l 0-0 Toluene ug/l 0-0 Xylenes, Total 0.0. ug/l 0 - Unit D %Rec %Rec. Surrogate %Recovery LCS LCS Qualifier Dibromofluoromethane (Surr) 0-0 Toluene-d (Surr) 0-0,-Dichloroethane-d (Surr) 0-0 -Bromofluorobenzene (Surr) 0-0 Lab Sample ID: LCSD 0-0/ Analysis Batch: 0 Spike Added LCSD LCSD Client Sample ID: Lab Control Sample Dup Prep Type: Total/NA Benzene 0.0. ug/l 0-0 Ethylbenzene 0.0. ug/l Methyl tert-butyl ether ug/l 0-0 Toluene 0.0. ug/l 0-0 Xylenes, Total ug/l 0 - Surrogate LCSD LCSD %Recovery Qualifier Dibromofluoromethane (Surr) 0-0 Toluene-d (Surr) 0-0,-Dichloroethane-d (Surr) 0-0 -Bromofluorobenzene (Surr) 0-0 Unit D %Rec %Rec. RPD RPD Limit Page of //0

304 Client: AECOM Project/Site:.Hampstead.EL (MD) QC Sample Results Method: 0B - Volatile Organic Compounds (GC/MS) (Continued) Lab Sample ID: 0-- MS Analysis Batch: 0 Sample Sample Result Qualifier Spike Added MS MS TestAmerica Job ID: 0-- SDG: Hanover Pike, Hampstead, MD Client Sample ID: GAC- Final Prep Type: Total/NA Benzene 0.0. ug/l - Ethylbenzene 0.0. ug/l - Methyl tert-butyl ether 0.0. ug/l - Toluene 0.0. ug/l - Xylenes, Total ug/l - Surrogate %Recovery MS MS Qualifier Dibromofluoromethane (Surr) 0-0 Toluene-d (Surr) 0-0,-Dichloroethane-d (Surr) 0-0 -Bromofluorobenzene (Surr) 0-0 Lab Sample ID: 0-- MSD Analysis Batch: 0 Sample Sample Result Qualifier Spike Added MSD MSD Unit D %Rec %Rec. Client Sample ID: GAC- Final Prep Type: Total/NA Benzene 0.0. ug/l - Ethylbenzene 0.0. ug/l - Methyl tert-butyl ether 0.0. ug/l - Toluene ug/l - Xylenes, Total 0.0. ug/l - Unit D %Rec %Rec. RPD RPD Limit Surrogate %Recovery MSD MSD Qualifier Dibromofluoromethane (Surr) 0-0 Toluene-d (Surr) 0-0,-Dichloroethane-d (Surr) 0-0 -Bromofluorobenzene (Surr) 0-0 Method: 0C - Nonhalogenated Organics using GC/FID -Modified (Gasoline Range Organics) Lab Sample ID: MB 0-0/ Analysis Batch: 0 MB MB RL MDL Client Sample ID: Method Blank Prep Type: Total/NA Gasoline Range Organics [C - C] 0 ug/l 0// : Surrogate %Recovery MB MB Qualifier a,a,a-trifluorotoluene 0-0 0// : Unit D Page of //0

305 Client: AECOM Project/Site:.Hampstead.EL (MD) QC Sample Results TestAmerica Job ID: 0-- SDG: Hanover Pike, Hampstead, MD Method: 0C - Nonhalogenated Organics using GC/FID -Modified (Gasoline Range Organics) (Continued) Lab Sample ID: LCS 0-0/ Analysis Batch: 0 Gasoline Range Organics [C - C] Surrogate %Recovery LCS LCS Qualifier Spike Added a,a,a-trifluorotoluene 0-0 Lab Sample ID: LCSD 0-0/ Analysis Batch: 0 Gasoline Range Organics [C - C] Surrogate LCSD LCSD %Recovery Qualifier LCS LCS Unit Client Sample ID: Lab Control Sample Prep Type: Total/NA 00 ug/l - 0 Spike Added a,a,a-trifluorotoluene 0-0 LCSD LCSD D %Rec %Rec. Client Sample ID: Lab Control Sample Dup Prep Type: Total/NA Unit 00 0 ug/l - 0 D %Rec %Rec. RPD RPD Limit Lab Sample ID: 0-- MS Analysis Batch: 0 Sample Sample Gasoline Range Organics [C - C] Surrogate Result %Recovery Qualifier Spike Added a,a,a-trifluorotoluene Gasoline Range Organics [C - C] MS MS Client Sample ID: GAC- EFF Prep Type: Total/NA 00. ug/l - MS MS Qualifier Lab Sample ID: 0-- MSD Analysis Batch: 0 Sample Sample Surrogate Result %Recovery Qualifier Spike Added a,a,a-trifluorotoluene 0-0 MSD MSD Unit D %Rec %Rec. Client Sample ID: GAC- EFF Prep Type: Total/NA 00 ug/l - MSD MSD Qualifier Unit D %Rec %Rec. RPD RPD Limit Page of //0

306 QC Association Summary Client: AECOM TestAmerica Job ID: 0-- Project/Site:.Hampstead.EL (MD) SDG: Hanover Pike, Hampstead, MD GC/MS VOA Analysis Batch: 0 Lab Sample ID Client Sample ID Prep Type Matrix Method Prep Batch 0-- A/S INF Total/NA Water 0B 0-- A/S EFF Total/NA Water 0B 0-- GAC- EFF Total/NA Water 0B 0-- GAC- Final Total/NA Water 0B 0-- MW Total/NA Water 0B 0-- MW Total/NA Water 0B 0-- MW Total/NA Water 0B MB 0-0/ Method Blank Total/NA Water 0B LCS 0-0/ Lab Control Sample Total/NA Water 0B LCSD 0-0/ Lab Control Sample Dup Total/NA Water 0B 0-- MS GAC- Final Total/NA Water 0B 0-- MSD GAC- Final Total/NA Water 0B GC VOA Analysis Batch: 0 Lab Sample ID Client Sample ID Prep Type Matrix Method Prep Batch 0-- A/S INF Total/NA Water 0C 0-- A/S EFF Total/NA Water 0C 0-- GAC- EFF Total/NA Water 0C 0-- GAC- Final Total/NA Water 0C 0-- MW Total/NA Water 0C 0-- MW Total/NA Water 0C 0-- MW Total/NA Water 0C MB 0-0/ Method Blank Total/NA Water 0C LCS 0-0/ Lab Control Sample Total/NA Water 0C LCSD 0-0/ Lab Control Sample Dup Total/NA Water 0C 0-- MS GAC- EFF Total/NA Water 0C 0-- MSD GAC- EFF Total/NA Water 0C Page of //0

307 Lab Chronicle Client: AECOM TestAmerica Job ID: 0-- Project/Site:.Hampstead.EL (MD) SDG: Hanover Pike, Hampstead, MD Client Sample ID: A/S INF Lab Sample ID: 0-- Date Collected: 0// :0 Date Received: 0// :0 Prep Type Batch Type Batch Method Run Dil Factor or Analyst Total/NA Analysis 0B ml ml 0 0/0/ 0:0 JJR TAL NSH Initial Amount Final Amount Batch Number Total/NA Analysis 0C ml ml 0 0// : SS TAL NSH Client Sample ID: A/S EFF Lab Sample ID: 0-- Date Collected: 0// : Date Received: 0// :0 Prep Type Batch Type Batch Method Run Dil Factor or Analyst Total/NA Analysis 0B ml ml 0 0/0/ 0: JJR TAL NSH Initial Amount Final Amount Batch Number Total/NA Analysis 0C ml ml 0 0// : SS TAL NSH Client Sample ID: GAC- EFF Lab Sample ID: 0-- Date Collected: 0// :0 Date Received: 0// :0 Lab Lab Prep Type Batch Type Batch Method Run Dil Factor or Analyst Total/NA Analysis 0B ml ml 0 0/0/ 0: JJR TAL NSH Initial Amount Final Amount Batch Number Total/NA Analysis 0C ml ml 0 0// : SS TAL NSH Lab Client Sample ID: GAC- Final Lab Sample ID: 0-- Date Collected: 0// : Date Received: 0// :0 Prep Type Batch Type Batch Method Run Dil Factor or Analyst Total/NA Analysis 0B ml ml 0 0/0/ 0: JJR TAL NSH Initial Amount Final Amount Batch Number Total/NA Analysis 0C ml ml 0 0// 0:0 SS TAL NSH Lab Client Sample ID: MW Lab Sample ID: 0-- Date Collected: 0// :00 Date Received: 0// :0 Prep Type Batch Type Batch Method Run Dil Factor or Analyst Total/NA Analysis 0B ml ml 0 0/0/ 0: JJR TAL NSH Initial Amount Final Amount Batch Number Total/NA Analysis 0C ml ml 0 0// 0: SS TAL NSH Lab Client Sample ID: MW Lab Sample ID: 0-- Date Collected: 0// :0 Date Received: 0// :0 Prep Type Batch Type Batch Method Run Dil Factor or Analyst Total/NA Analysis 0B ml ml 0 0/0/ 0: JJR TAL NSH Initial Amount Final Amount Batch Number Lab Page of //0

308 Lab Chronicle Client: AECOM TestAmerica Job ID: 0-- Project/Site:.Hampstead.EL (MD) SDG: Hanover Pike, Hampstead, MD Client Sample ID: MW Lab Sample ID: 0-- Date Collected: 0// :0 Date Received: 0// :0 Prep Type Batch Type Batch Method Run Dil Factor or Analyst Total/NA Analysis 0C ml ml 0 0// :0 SS TAL NSH Initial Amount Final Amount Batch Number Client Sample ID: MW Lab Sample ID: 0-- Date Collected: 0// : Date Received: 0// :0 Prep Type Batch Type Batch Method Run Dil Factor or Analyst Total/NA Analysis 0B ml ml 0 0/0/ :0 JJR TAL NSH Initial Amount Final Amount Batch Number Total/NA Analysis 0C ml ml 0 0// : SS TAL NSH Laboratory References: TAL NSH =, 0 Foster Creighton Drive, Nashville, TN 0, TEL ()-0 Lab Lab Page of //0

309 Client: AECOM Project/Site:.Hampstead.EL (MD) Method Summary TestAmerica Job ID: 0-- SDG: Hanover Pike, Hampstead, MD Method Method Description Protocol Laboratory 0B Volatile Organic Compounds (GC/MS) SW TAL NSH 0C Nonhalogenated Organics using GC/FID -Modified (Gasoline Range Organics) SW TAL NSH 00B Purge and Trap SW TAL NSH Protocol References: SW = "Test Methods For Evaluating Solid Waste, Physical/Chemical Methods", Third Edition, November And Its Updates. Laboratory References: TAL NSH =, 0 Foster Creighton Drive, Nashville, TN 0, TEL ()-0 Page of //0

310 Accreditation/Certification Summary Client: AECOM TestAmerica Job ID: 0-- Project/Site:.Hampstead.EL (MD) SDG: Hanover Pike, Hampstead, MD Laboratory: Unless otherwise noted, all analytes for this laboratory were covered under each accreditation/certification below. Authority Program EPA Region Identification Number Expiration Date Maryland State Program 0-- The following analytes are included in this report, but accreditation/certification is not offered by the governing authority: Analysis Method Prep Method Matrix 0C Water Gasoline Range Organics [C - C] 0B Water Benzene 0B Water Ethylbenzene 0B Water Methyl tert-butyl ether 0B Water Toluene 0B Water Xylenes, Total Page 0 of //0

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313 ANALYTICAL REPORT TestAmerica Laboratories, Inc. 0 Foster Creighton Drive Nashville, TN 0 Tel: ()-0 TestAmerica Job ID: 0-- TestAmerica SDG: Hanover Pike, Hampstead, MD Client Project/Site:.Hampstead.EL (MD) For: AECOM 000 Virginia Manor Road Suite Beltsville, Maryland 00 Attn: Mr. John Canzeri Authorized for release by: //0 ::0 PM Leah Klingensmith, Senior Project Manager ()0-0 leah.klingensmith@testamericainc.com Designee for Jennifer Huckaba, Project Manager II ()0-0 jennifer.huckaba@testamericainc.com The test results in this report meet all 00 NELAC and 00 TNI requirements for accredited parameters, 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 Manager at the address or telephone number listed on this page. This report has been electronically signed and authorized by the signatory. Electronic signature is intended 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.

314 Client: AECOM Project/Site:.Hampstead.EL (MD) Table of Contents TestAmerica Job ID: 0-- SDG: Hanover Pike, Hampstead, MD Cover Page Table of Contents Sample Summary Case Narrative Definitions Client Sample Results QC Sample Results QC Association Chronicle Method Summary Certification Summary Chain of Custody Page of //0

315 Sample Summary Client: AECOM TestAmerica Job ID: 0-- Project/Site:.Hampstead.EL (MD) SDG: Hanover Pike, Hampstead, MD Lab Sample ID Client Sample ID Matrix Collected Received 0-- A/S INF Water 0/0/ :0 0/0/ : A/S EFF Water 0/0/ : 0/0/ : GAC- EFF Water 0/0/ : 0/0/ : GAC- FINAL Water 0/0/ :0 0/0/ : MW Water 0/0/ : 0/0/ : MW Water 0/0/ : 0/0/ : MW Water 0/0/ :0 0/0/ :00 Page of //0

316 Case Narrative Client: AECOM TestAmerica Job ID: 0-- Project/Site:.Hampstead.EL (MD) SDG: Hanover Pike, Hampstead, MD Job ID: 0-- Laboratory: Narrative Comments No additional comments. Job Narrative 0-- Receipt The samples were received on //0 :00 AM; the samples arrived in good condition, properly preserved and, where required, on ice. The temperature of the cooler at receipt was.º C. GC/MS VOA No analytical or quality issues were noted, other than those described in the Definitions/Glossary page. GC VOA No analytical or quality issues were noted, other than those described in the Definitions/Glossary page. VOA Prep No analytical or quality issues were noted, other than those described in the Definitions/Glossary page. Page of //0

317 Definitions/Glossary Client: AECOM TestAmerica Job ID: 0-- Project/Site:.Hampstead.EL (MD) SDG: Hanover Pike, Hampstead, MD Glossary Abbreviation 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 %R Percent Recovery CFL Contains Free Liquid CNF Contains No Free Liquid DER Duplicate Error Ratio (normalized absolute difference) 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 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) Page of //0

318 Client: AECOM Project/Site:.Hampstead.EL (MD) Client Sample ID: A/S INF Date Collected: 0/0/ :0 Date Received: 0/0/ :00 Method: 0B - Volatile Organic Compounds (GC/MS) Client Sample Results RL MDL TestAmerica Job ID: 0-- SDG: Hanover Pike, Hampstead, MD Lab Sample ID: 0-- Benzene.00 ug/l 0/0/ 0: Ethylbenzene Methyl tert-butyl ether. Toluene Xylenes, Total Surrogate %Recovery Qualifier Unit D.00 ug/l 0/0/ 0:.00 ug/l 0/0/ 0:.00 ug/l 0/0/ 0:.00 ug/l 0/0/ 0: Dibromofluoromethane (Surr) 0-0 0/0/ 0: Toluene-d (Surr) 0-0 0/0/ 0:,-Dichloroethane-d (Surr) 0-0 0/0/ 0: -Bromofluorobenzene (Surr) 0-0 0/0/ 0: Method: 0C - Nonhalogenated Organics using GC/FID -Modified (Gasoline Range Organics) RL MDL Unit D Gasoline Range Organics [C - C] 0 ug/l 0/0/ : Surrogate %Recovery Qualifier a,a,a-trifluorotoluene /0/ : Page of //0

319 Client: AECOM Project/Site:.Hampstead.EL (MD) Client Sample ID: A/S EFF Date Collected: 0/0/ : Date Received: 0/0/ :00 Method: 0B - Volatile Organic Compounds (GC/MS) Client Sample Results RL MDL TestAmerica Job ID: 0-- SDG: Hanover Pike, Hampstead, MD Lab Sample ID: 0-- Benzene.00 ug/l 0/0/ 0:0 Ethylbenzene Methyl tert-butyl ether Toluene Xylenes, Total Surrogate %Recovery Qualifier Unit D.00 ug/l 0/0/ 0:0.00 ug/l 0/0/ 0:0.00 ug/l 0/0/ 0:0.00 ug/l 0/0/ 0:0 Dibromofluoromethane (Surr) 0-0 0/0/ 0:0 Toluene-d (Surr) 0-0 0/0/ 0:0,-Dichloroethane-d (Surr) 0-0 0/0/ 0:0 -Bromofluorobenzene (Surr) 0-0 0/0/ 0:0 Method: 0C - Nonhalogenated Organics using GC/FID -Modified (Gasoline Range Organics) RL MDL Unit D Gasoline Range Organics [C - C] 0 ug/l 0/0/ : Surrogate %Recovery Qualifier a,a,a-trifluorotoluene 0-0 0/0/ : Page of //0

320 Client: AECOM Project/Site:.Hampstead.EL (MD) Client Sample ID: GAC- EFF Date Collected: 0/0/ : Date Received: 0/0/ :00 Method: 0B - Volatile Organic Compounds (GC/MS) Client Sample Results RL MDL TestAmerica Job ID: 0-- SDG: Hanover Pike, Hampstead, MD Lab Sample ID: 0-- Benzene.00 ug/l 0/0/ 0: Ethylbenzene Methyl tert-butyl ether Toluene Xylenes, Total Surrogate %Recovery Qualifier Unit D.00 ug/l 0/0/ 0:.00 ug/l 0/0/ 0:.00 ug/l 0/0/ 0:.00 ug/l 0/0/ 0: Dibromofluoromethane (Surr) 0-0 0/0/ 0: Toluene-d (Surr) /0/ 0:,-Dichloroethane-d (Surr) 0-0 0/0/ 0: -Bromofluorobenzene (Surr) 0-0 0/0/ 0: Method: 0C - Nonhalogenated Organics using GC/FID -Modified (Gasoline Range Organics) RL MDL Unit D Gasoline Range Organics [C - C] 0 ug/l 0/0/ : Surrogate %Recovery Qualifier a,a,a-trifluorotoluene 0-0 0/0/ : Page of //0

321 Client: AECOM Project/Site:.Hampstead.EL (MD) Client Sample ID: GAC- FINAL Date Collected: 0/0/ :0 Date Received: 0/0/ :00 Method: 0B - Volatile Organic Compounds (GC/MS) Client Sample Results RL MDL TestAmerica Job ID: 0-- SDG: Hanover Pike, Hampstead, MD Lab Sample ID: 0-- Benzene.00 ug/l 0/0/ 0: Ethylbenzene Methyl tert-butyl ether Toluene Xylenes, Total Surrogate %Recovery Qualifier Unit D.00 ug/l 0/0/ 0:.00 ug/l 0/0/ 0:.00 ug/l 0/0/ 0:.00 ug/l 0/0/ 0: Dibromofluoromethane (Surr) 0-0 0/0/ 0: Toluene-d (Surr) 0-0 0/0/ 0:,-Dichloroethane-d (Surr) 0-0 0/0/ 0: -Bromofluorobenzene (Surr) 0-0 0/0/ 0: Method: 0C - Nonhalogenated Organics using GC/FID -Modified (Gasoline Range Organics) RL MDL Unit D Gasoline Range Organics [C - C] 0 ug/l 0/0/ : Surrogate %Recovery Qualifier a,a,a-trifluorotoluene 0-0 0/0/ : Page of //0

322 Client: AECOM Project/Site:.Hampstead.EL (MD) Client Sample ID: MW Date Collected: 0/0/ : Date Received: 0/0/ :00 Method: 0B - Volatile Organic Compounds (GC/MS) Client Sample Results RL MDL TestAmerica Job ID: 0-- SDG: Hanover Pike, Hampstead, MD Lab Sample ID: 0-- Benzene.00 ug/l 0/0/ 0:0 Ethylbenzene Methyl tert-butyl ether. Toluene Xylenes, Total Surrogate %Recovery Qualifier Unit D.00 ug/l 0/0/ 0:0.00 ug/l 0/0/ 0:0.00 ug/l 0/0/ 0:0.00 ug/l 0/0/ 0:0 Dibromofluoromethane (Surr) 0-0 0/0/ 0:0 Toluene-d (Surr) 0-0 0/0/ 0:0,-Dichloroethane-d (Surr) 0-0 0/0/ 0:0 -Bromofluorobenzene (Surr) 0-0 0/0/ 0:0 Method: 0C - Nonhalogenated Organics using GC/FID -Modified (Gasoline Range Organics) RL MDL Unit D Gasoline Range Organics [C - C] 0 ug/l 0/0/ : Surrogate %Recovery Qualifier a,a,a-trifluorotoluene 0-0 0/0/ : Page of //0

323 Client: AECOM Project/Site:.Hampstead.EL (MD) Client Sample ID: MW Date Collected: 0/0/ : Date Received: 0/0/ :00 Method: 0B - Volatile Organic Compounds (GC/MS) Client Sample Results RL MDL TestAmerica Job ID: 0-- SDG: Hanover Pike, Hampstead, MD Lab Sample ID: 0-- Benzene.00 ug/l 0/0/ 0: Ethylbenzene Methyl tert-butyl ether. Toluene Xylenes, Total Surrogate %Recovery Qualifier Unit D.00 ug/l 0/0/ 0:.00 ug/l 0/0/ 0:.00 ug/l 0/0/ 0:.00 ug/l 0/0/ 0: Dibromofluoromethane (Surr) 0-0 0/0/ 0: Toluene-d (Surr) 0-0 0/0/ 0:,-Dichloroethane-d (Surr) 0-0 0/0/ 0: -Bromofluorobenzene (Surr) /0/ 0: Method: 0C - Nonhalogenated Organics using GC/FID -Modified (Gasoline Range Organics) RL MDL Unit D Gasoline Range Organics [C - C] 0 ug/l 0/0/ :0 Surrogate %Recovery Qualifier a,a,a-trifluorotoluene 0-0 0/0/ :0 Page of //0

324 Client: AECOM Project/Site:.Hampstead.EL (MD) Client Sample ID: MW Date Collected: 0/0/ :0 Date Received: 0/0/ :00 Method: 0B - Volatile Organic Compounds (GC/MS) Client Sample Results RL MDL TestAmerica Job ID: 0-- SDG: Hanover Pike, Hampstead, MD Lab Sample ID: 0-- Benzene.00 ug/l 0/0/ 0: Ethylbenzene Methyl tert-butyl ether Toluene Xylenes, Total Surrogate %Recovery Qualifier Unit D.00 ug/l 0/0/ 0:.00 ug/l 0/0/ 0:.00 ug/l 0/0/ 0:.00 ug/l 0/0/ 0: Dibromofluoromethane (Surr) 0-0 0/0/ 0: Toluene-d (Surr) 0-0 0/0/ 0:,-Dichloroethane-d (Surr) 0-0 0/0/ 0: -Bromofluorobenzene (Surr) /0/ 0: Method: 0C - Nonhalogenated Organics using GC/FID -Modified (Gasoline Range Organics) RL MDL Unit D Gasoline Range Organics [C - C] 0 ug/l 0/0/ :0 Surrogate %Recovery Qualifier a,a,a-trifluorotoluene 0-0 0/0/ :0 Page of //0

325 Client: AECOM Project/Site:.Hampstead.EL (MD) QC Sample Results Method: 0B - Volatile Organic Compounds (GC/MS) Lab Sample ID: MB 0-/ Analysis Batch: MB MB RL MDL TestAmerica Job ID: 0-- SDG: Hanover Pike, Hampstead, MD Client Sample ID: Method Blank Prep Type: Total/NA Benzene.00 ug/l 0/0/ 0:0 Ethylbenzene Methyl tert-butyl ether Toluene Xylenes, Total Surrogate %Recovery Unit D.00 ug/l 0/0/ 0:0.00 ug/l 0/0/ 0:0.00 ug/l 0/0/ 0:0.00 ug/l 0/0/ 0:0 MB MB Qualifier Dibromofluoromethane (Surr) 0-0 0/0/ 0:0 Toluene-d (Surr) 0-0 0/0/ 0:0,-Dichloroethane-d (Surr) 0-0 0/0/ 0:0 -Bromofluorobenzene (Surr) 0-0 0/0/ 0:0 Lab Sample ID: LCS 0-/ Analysis Batch: Spike Added LCS LCS Client Sample ID: Lab Control Sample Prep Type: Total/NA Benzene 0.0. ug/l 0-0 Ethylbenzene ug/l 0-0 Methyl tert-butyl ether 0.0. ug/l 0-0 Toluene 0.0. ug/l 0-0 Xylenes, Total 0. ug/l 0 - Unit D %Rec %Rec. Surrogate %Recovery LCS LCS Qualifier Dibromofluoromethane (Surr) 0-0 Toluene-d (Surr) 0-0,-Dichloroethane-d (Surr) 0-0 -Bromofluorobenzene (Surr) 0-0 Lab Sample ID: LCSD 0-/ Analysis Batch: Spike Added LCSD LCSD Client Sample ID: Lab Control Sample Dup Prep Type: Total/NA Benzene 0.0. ug/l 0-0 Ethylbenzene 0.0. ug/l Methyl tert-butyl ether 0.0. ug/l 0-0 Toluene 0.0. ug/l Xylenes, Total 0. ug/l 0 - Surrogate LCSD LCSD %Recovery Qualifier Dibromofluoromethane (Surr) 0-0 Toluene-d (Surr) 0-0,-Dichloroethane-d (Surr) 0-0 -Bromofluorobenzene (Surr) 0-0 Unit D %Rec %Rec. RPD RPD Limit Page of //0

326 Client: AECOM Project/Site:.Hampstead.EL (MD) QC Sample Results Method: 0B - Volatile Organic Compounds (GC/MS) (Continued) Lab Sample ID: 0--D- MS Analysis Batch: Sample Sample Result Qualifier Spike Added MS MS TestAmerica Job ID: 0-- SDG: Hanover Pike, Hampstead, MD Client Sample ID: Matrix Spike Prep Type: Total/NA Benzene 0.0. ug/l - Ethylbenzene 0.0. ug/l - Methyl tert-butyl ether ug/l 0 - Toluene 0.0. ug/l - Xylenes, Total 0. ug/l - Surrogate %Recovery MS MS Qualifier Dibromofluoromethane (Surr) 0-0 Toluene-d (Surr) 0-0,-Dichloroethane-d (Surr) 0-0 -Bromofluorobenzene (Surr) 0-0 Lab Sample ID: 0--E- MSD Analysis Batch: Sample Sample Result Qualifier Spike Added MSD MSD Unit D %Rec %Rec. Client Sample ID: Matrix Spike Duplicate Prep Type: Total/NA Benzene 0.0. ug/l - Ethylbenzene 0.0. ug/l - Methyl tert-butyl ether 0.0. ug/l - Toluene 0.0. ug/l - 0 Xylenes, Total 0. ug/l - Unit D %Rec %Rec. RPD RPD Limit Surrogate %Recovery MSD MSD Qualifier Dibromofluoromethane (Surr) 0-0 Toluene-d (Surr) 0-0,-Dichloroethane-d (Surr) 0-0 -Bromofluorobenzene (Surr) 0-0 Method: 0C - Nonhalogenated Organics using GC/FID -Modified (Gasoline Range Organics) Lab Sample ID: MB 0-/ Analysis Batch: MB MB RL MDL Client Sample ID: Method Blank Prep Type: Total/NA Gasoline Range Organics [C - C] 0 ug/l 0/0/ : Surrogate %Recovery MB MB Qualifier a,a,a-trifluorotoluene 0-0 0/0/ : Unit D Page of //0

327 Client: AECOM Project/Site:.Hampstead.EL (MD) QC Sample Results TestAmerica Job ID: 0-- SDG: Hanover Pike, Hampstead, MD Method: 0C - Nonhalogenated Organics using GC/FID -Modified (Gasoline Range Organics) (Continued) Lab Sample ID: LCS 0-/ Analysis Batch: Gasoline Range Organics [C - C] Surrogate %Recovery LCS LCS Qualifier Spike Added a,a,a-trifluorotoluene 0-0 Lab Sample ID: LCSD 0-/ Analysis Batch: Gasoline Range Organics [C - C] Surrogate LCSD LCSD %Recovery Qualifier LCS LCS Unit Client Sample ID: Lab Control Sample Prep Type: Total/NA 00 ug/l - 0 Spike Added a,a,a-trifluorotoluene 0-0 LCSD LCSD D %Rec %Rec. Client Sample ID: Lab Control Sample Dup Prep Type: Total/NA Unit 00 ug/l - 0 D %Rec %Rec. RPD RPD Limit Lab Sample ID: 0-- MS Analysis Batch: Sample Sample Gasoline Range Organics [C - C] Surrogate Result %Recovery Qualifier Spike Added a,a,a-trifluorotoluene 0-0 Gasoline Range Organics [C - C] MS MS Client Sample ID: GAC- EFF Prep Type: Total/NA 00 ug/l - MS MS Qualifier Lab Sample ID: 0-- MSD Analysis Batch: Sample Sample Surrogate Result %Recovery Qualifier Spike Added a,a,a-trifluorotoluene 0-0 MSD MSD Unit D %Rec %Rec. Client Sample ID: GAC- EFF Prep Type: Total/NA 00. ug/l - MSD MSD Qualifier Unit D %Rec %Rec. RPD RPD Limit Page of //0

328 QC Association Summary Client: AECOM TestAmerica Job ID: 0-- Project/Site:.Hampstead.EL (MD) SDG: Hanover Pike, Hampstead, MD GC/MS VOA Analysis Batch: Lab Sample ID Client Sample ID Prep Type Matrix Method Prep Batch 0-- A/S INF Total/NA Water 0B 0-- A/S EFF Total/NA Water 0B 0-- GAC- EFF Total/NA Water 0B 0-- GAC- FINAL Total/NA Water 0B 0-- MW Total/NA Water 0B 0-- MW Total/NA Water 0B 0-- MW Total/NA Water 0B MB 0-/ Method Blank Total/NA Water 0B LCS 0-/ Lab Control Sample Total/NA Water 0B LCSD 0-/ Lab Control Sample Dup Total/NA Water 0B 0--D- MS Matrix Spike Total/NA Water 0B 0--E- MSD Matrix Spike Duplicate Total/NA Water 0B GC VOA Analysis Batch: Lab Sample ID Client Sample ID Prep Type Matrix Method Prep Batch 0-- A/S INF Total/NA Water 0C 0-- A/S EFF Total/NA Water 0C 0-- GAC- EFF Total/NA Water 0C 0-- GAC- FINAL Total/NA Water 0C 0-- MW Total/NA Water 0C 0-- MW Total/NA Water 0C 0-- MW Total/NA Water 0C MB 0-/ Method Blank Total/NA Water 0C LCS 0-/ Lab Control Sample Total/NA Water 0C LCSD 0-/ Lab Control Sample Dup Total/NA Water 0C 0-- MS GAC- EFF Total/NA Water 0C 0-- MSD GAC- EFF Total/NA Water 0C Page of //0

329 Lab Chronicle Client: AECOM TestAmerica Job ID: 0-- Project/Site:.Hampstead.EL (MD) SDG: Hanover Pike, Hampstead, MD Client Sample ID: A/S INF Lab Sample ID: 0-- Date Collected: 0/0/ :0 Date Received: 0/0/ :00 Prep Type Batch Type Batch Method Run Dil Factor or Analyst Total/NA Analysis 0B ml ml 0/0/ 0: SS TAL NSH Initial Amount Final Amount Batch Number Total/NA Analysis 0C ml ml 0/0/ : AK TAL NSH Client Sample ID: A/S EFF Lab Sample ID: 0-- Date Collected: 0/0/ : Date Received: 0/0/ :00 Prep Type Batch Type Batch Method Run Dil Factor or Analyst Total/NA Analysis 0B ml ml 0/0/ 0:0 SS TAL NSH Initial Amount Final Amount Batch Number Total/NA Analysis 0C ml ml 0/0/ : AK TAL NSH Client Sample ID: GAC- EFF Lab Sample ID: 0-- Date Collected: 0/0/ : Date Received: 0/0/ :00 Lab Lab Prep Type Batch Type Batch Method Run Dil Factor or Analyst Total/NA Analysis 0B ml ml 0/0/ 0: SS TAL NSH Initial Amount Final Amount Batch Number Total/NA Analysis 0C ml ml 0/0/ : AK TAL NSH Lab Client Sample ID: GAC- FINAL Lab Sample ID: 0-- Date Collected: 0/0/ :0 Date Received: 0/0/ :00 Prep Type Batch Type Batch Method Run Dil Factor or Analyst Total/NA Analysis 0B ml ml 0/0/ 0: SS TAL NSH Initial Amount Final Amount Batch Number Total/NA Analysis 0C ml ml 0/0/ : AK TAL NSH Lab Client Sample ID: MW Lab Sample ID: 0-- Date Collected: 0/0/ : Date Received: 0/0/ :00 Prep Type Batch Type Batch Method Run Dil Factor or Analyst Total/NA Analysis 0B ml ml 0/0/ 0:0 SS TAL NSH Initial Amount Final Amount Batch Number Total/NA Analysis 0C ml ml 0/0/ : AK TAL NSH Lab Client Sample ID: MW Lab Sample ID: 0-- Date Collected: 0/0/ : Date Received: 0/0/ :00 Prep Type Batch Type Batch Method Run Dil Factor or Analyst Total/NA Analysis 0B ml ml 0/0/ 0: SS TAL NSH Initial Amount Final Amount Batch Number Lab Page of //0

330 Lab Chronicle Client: AECOM TestAmerica Job ID: 0-- Project/Site:.Hampstead.EL (MD) SDG: Hanover Pike, Hampstead, MD Client Sample ID: MW Lab Sample ID: 0-- Date Collected: 0/0/ : Date Received: 0/0/ :00 Prep Type Batch Type Batch Method Run Dil Factor or Analyst Total/NA Analysis 0C ml ml 0/0/ :0 AK TAL NSH Initial Amount Final Amount Batch Number Client Sample ID: MW Lab Sample ID: 0-- Date Collected: 0/0/ :0 Date Received: 0/0/ :00 Prep Type Batch Type Batch Method Run Dil Factor or Analyst Total/NA Analysis 0B ml ml 0/0/ 0: SS TAL NSH Initial Amount Final Amount Batch Number Total/NA Analysis 0C ml ml 0/0/ :0 AK TAL NSH Laboratory References: TAL NSH =, 0 Foster Creighton Drive, Nashville, TN 0, TEL ()-0 Lab Lab Page of //0

331 Client: AECOM Project/Site:.Hampstead.EL (MD) Method Summary TestAmerica Job ID: 0-- SDG: Hanover Pike, Hampstead, MD Method Method Description Protocol Laboratory 0B Volatile Organic Compounds (GC/MS) SW TAL NSH 0C Nonhalogenated Organics using GC/FID -Modified (Gasoline Range Organics) SW TAL NSH 00B Purge and Trap SW TAL NSH Protocol References: SW = "Test Methods For Evaluating Solid Waste, Physical/Chemical Methods", Third Edition, November And Its Updates. Laboratory References: TAL NSH =, 0 Foster Creighton Drive, Nashville, TN 0, TEL ()-0 Page of //0

332 Accreditation/Certification Summary Client: AECOM TestAmerica Job ID: 0-- Project/Site:.Hampstead.EL (MD) SDG: Hanover Pike, Hampstead, MD Laboratory: All 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 ALA ISO/IEC Alaska (UST) State Program UST * Arizona State Program AZ Arkansas DEQ State Program California State Program -- Connecticut State Program PH Florida NELAP E 0-0- Georgia State Program NA: NELAP & ALA -- Illinois NELAP Iowa State Program Kansas NELAP E- -- Kentucky (UST) State Program 0-0- Kentucky (WW) State Program Louisiana NELAP Maine State Program TN Maryland State Program 0-- Massachusetts State Program M-TN Minnesota NELAP Mississippi State Program N/A 0-0- Montana (UST) State Program NA 0--0 Nevada State Program TN New Hampshire NELAP -0- New Jersey NELAP TN 0-0- New York NELAP 0-- North Carolina (WW/SW) State Program -- North Dakota State Program R * Ohio VAP State Program CL Oklahoma State Program 0-- Oregon NELAP TN Pennsylvania NELAP Rhode Island State Program LAO00-0- South Carolina State Program 00 (00) 0-- Tennessee State Program Texas NELAP T USDA Federal P Utah NELAP TN * Virginia NELAP Washington State Program C 0-- West Virginia DEP State Program 0-- Wisconsin State Program Wyoming (UST) ALA.0 -- * Accreditation/Certification renewal pending - accreditation/certification considered valid. Page 0 of //0

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335 ANALYTICAL REPORT TestAmerica Laboratories, Inc. 0 Foster Creighton Drive Nashville, TN 0 Tel: ()-0 TestAmerica Job ID: 0-0- TestAmerica SDG: Hanover Pike, Hampstead, MD Client Project/Site:.Hampstead.EL (MD) For: AECOM 000 Virginia Manor Road Suite Beltsville, Maryland 00 Attn: Mr. John Canzeri Authorized for release by: //0 ::0 PM Jennifer Huckaba, Project Manager II ()0-0 jennifer.huckaba@testamericainc.com The test results in this report meet all 00 NELAC and 00 TNI requirements for accredited parameters, 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 Manager at the address or telephone number listed on this page. This report has been electronically signed and authorized by the signatory. Electronic signature is intended 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.

336 Client: AECOM Project/Site:.Hampstead.EL (MD) Table of Contents TestAmerica Job ID: 0-0- SDG: Hanover Pike, Hampstead, MD Cover Page Table of Contents Sample Summary Case Narrative Definitions Client Sample Results QC Sample Results QC Association Chronicle Method Summary Certification Summary Chain of Custody Page of //0

337 Sample Summary Client: AECOM TestAmerica Job ID: 0-0- Project/Site:.Hampstead.EL (MD) SDG: Hanover Pike, Hampstead, MD Lab Sample ID Client Sample ID Matrix Collected Received 0-0- A/S INF Water 0// : 0// 0: 0-0- A/S EFF Water 0// : 0// 0: 0-0- GAC- EFF Water 0// :0 0// 0: 0-0- GAC- FINAL Water 0// : 0// 0: 0-0- MW Water 0// : 0// 0: 0-0- MW Water 0// : 0// 0: 0-0- MW Water 0// :0 0// 0: Page of //0

338 Case Narrative Client: AECOM TestAmerica Job ID: 0-0- Project/Site:.Hampstead.EL (MD) SDG: Hanover Pike, Hampstead, MD Job ID: 0-0- Laboratory: Narrative Comments No additional comments. Job Narrative 0-0- Receipt The samples were received on //0 : AM; the samples arrived in good condition, properly preserved and, where required, on ice. The temperature of the cooler at receipt was.º C. GC/MS VOA No analytical or quality issues were noted, other than those described in the Definitions/Glossary page. GC VOA No analytical or quality issues were noted, other than those described in the Definitions/Glossary page. VOA Prep No analytical or quality issues were noted, other than those described in the Definitions/Glossary page. Page of //0

339 Definitions/Glossary Client: AECOM TestAmerica Job ID: 0-0- Project/Site:.Hampstead.EL (MD) SDG: Hanover Pike, Hampstead, MD Glossary Abbreviation 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 %R Percent Recovery CFL Contains Free Liquid CNF Contains No Free Liquid DER Duplicate Error Ratio (normalized absolute difference) 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 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) Page of //0

340 Client: AECOM Project/Site:.Hampstead.EL (MD) Client Sample ID: A/S INF Date Collected: 0// : Date Received: 0// 0: Method: 0B - Volatile Organic Compounds (GC/MS) Client Sample Results RL MDL TestAmerica Job ID: 0-0- SDG: Hanover Pike, Hampstead, MD Lab Sample ID: 0-0- Benzene.00 ug/l 0// 0: Ethylbenzene Methyl tert-butyl ether.0 Toluene Xylenes, Total Surrogate %Recovery Qualifier Unit D.00 ug/l 0// 0:.00 ug/l 0// 0:.00 ug/l 0// 0:.00 ug/l 0// 0: Dibromofluoromethane (Surr) // 0: Toluene-d (Surr) 0-0 0// 0:,-Dichloroethane-d (Surr) 0-0 0// 0: -Bromofluorobenzene (Surr) 0-0 0// 0: Method: 0C - Nonhalogenated Organics using GC/FID -Modified (Gasoline Range Organics) RL MDL Unit D Gasoline Range Organics [C - C] 0 ug/l 0// : Surrogate %Recovery Qualifier a,a,a-trifluorotoluene 0-0 0// : Page of //0

341 Client: AECOM Project/Site:.Hampstead.EL (MD) Client Sample ID: A/S EFF Date Collected: 0// : Date Received: 0// 0: Method: 0B - Volatile Organic Compounds (GC/MS) Client Sample Results RL MDL TestAmerica Job ID: 0-0- SDG: Hanover Pike, Hampstead, MD Lab Sample ID: 0-0- Benzene.00 ug/l 0// 0:0 Ethylbenzene Methyl tert-butyl ether Toluene Xylenes, Total Surrogate %Recovery Qualifier Unit D.00 ug/l 0// 0:0.00 ug/l 0// 0:0.00 ug/l 0// 0:0.00 ug/l 0// 0:0 Dibromofluoromethane (Surr) 0-0 0// 0:0 Toluene-d (Surr) 0-0 0// 0:0,-Dichloroethane-d (Surr) 0-0 0// 0:0 -Bromofluorobenzene (Surr) 0-0 0// 0:0 Method: 0C - Nonhalogenated Organics using GC/FID -Modified (Gasoline Range Organics) RL MDL Unit D Gasoline Range Organics [C - C] 0 ug/l 0// 0: Surrogate %Recovery Qualifier a,a,a-trifluorotoluene 0-0 0// 0: Page of //0

342 Client: AECOM Project/Site:.Hampstead.EL (MD) Client Sample ID: GAC- EFF Date Collected: 0// :0 Date Received: 0// 0: Method: 0B - Volatile Organic Compounds (GC/MS) Client Sample Results RL MDL TestAmerica Job ID: 0-0- SDG: Hanover Pike, Hampstead, MD Lab Sample ID: 0-0- Benzene.00 ug/l 0// 0: Ethylbenzene Methyl tert-butyl ether Toluene Xylenes, Total Surrogate %Recovery Qualifier Unit D.00 ug/l 0// 0:.00 ug/l 0// 0:.00 ug/l 0// 0:.00 ug/l 0// 0: Dibromofluoromethane (Surr) 0-0 0// 0: Toluene-d (Surr) 0-0 0// 0:,-Dichloroethane-d (Surr) 0-0 0// 0: -Bromofluorobenzene (Surr) 0-0 0// 0: Method: 0C - Nonhalogenated Organics using GC/FID -Modified (Gasoline Range Organics) RL MDL Unit D Gasoline Range Organics [C - C] 0 ug/l 0// 0: Surrogate %Recovery Qualifier a,a,a-trifluorotoluene 0-0 0// 0: Page of //0

343 Client: AECOM Project/Site:.Hampstead.EL (MD) Client Sample ID: GAC- FINAL Date Collected: 0// : Date Received: 0// 0: Method: 0B - Volatile Organic Compounds (GC/MS) Client Sample Results RL MDL TestAmerica Job ID: 0-0- SDG: Hanover Pike, Hampstead, MD Lab Sample ID: 0-0- Benzene.00 ug/l 0// 0: Ethylbenzene Methyl tert-butyl ether Toluene Xylenes, Total Surrogate %Recovery Qualifier Unit D.00 ug/l 0// 0:.00 ug/l 0// 0:.00 ug/l 0// 0:.00 ug/l 0// 0: Dibromofluoromethane (Surr) 0-0 0// 0: Toluene-d (Surr) 0-0 0// 0:,-Dichloroethane-d (Surr) 0-0 0// 0: -Bromofluorobenzene (Surr) 0-0 0// 0: Method: 0C - Nonhalogenated Organics using GC/FID -Modified (Gasoline Range Organics) RL MDL Unit D Gasoline Range Organics [C - C] 0 ug/l 0// : Surrogate %Recovery Qualifier a,a,a-trifluorotoluene // : Page of //0

344 Client: AECOM Project/Site:.Hampstead.EL (MD) Client Sample ID: MW Date Collected: 0// : Date Received: 0// 0: Method: 0B - Volatile Organic Compounds (GC/MS) Client Sample Results RL MDL TestAmerica Job ID: 0-0- SDG: Hanover Pike, Hampstead, MD Lab Sample ID: 0-0- Benzene.00 ug/l 0// 0: Ethylbenzene Methyl tert-butyl ether. Toluene Xylenes, Total Surrogate %Recovery Qualifier Unit D.00 ug/l 0// 0:.00 ug/l 0// 0:.00 ug/l 0// 0:.00 ug/l 0// 0: Dibromofluoromethane (Surr) 0-0 0// 0: Toluene-d (Surr) 0-0 0// 0:,-Dichloroethane-d (Surr) // 0: -Bromofluorobenzene (Surr) 0-0 0// 0: Method: 0C - Nonhalogenated Organics using GC/FID -Modified (Gasoline Range Organics) RL MDL Unit D Gasoline Range Organics [C - C] 0 ug/l 0// : Surrogate %Recovery Qualifier a,a,a-trifluorotoluene 0-0 0// : Page of //0

345 Client: AECOM Project/Site:.Hampstead.EL (MD) Client Sample ID: MW Date Collected: 0// : Date Received: 0// 0: Method: 0B - Volatile Organic Compounds (GC/MS) Client Sample Results RL MDL TestAmerica Job ID: 0-0- SDG: Hanover Pike, Hampstead, MD Lab Sample ID: 0-0- Benzene.00 ug/l 0// 0: Ethylbenzene Methyl tert-butyl ether. Toluene Xylenes, Total Surrogate %Recovery Qualifier Unit D.00 ug/l 0// 0:.00 ug/l 0// 0:.00 ug/l 0// 0:.00 ug/l 0// 0: Dibromofluoromethane (Surr) 0-0 0// 0: Toluene-d (Surr) 0-0 0// 0:,-Dichloroethane-d (Surr) 0-0 0// 0: -Bromofluorobenzene (Surr) 0-0 0// 0: Method: 0C - Nonhalogenated Organics using GC/FID -Modified (Gasoline Range Organics) RL MDL Unit D Gasoline Range Organics [C - C] 0 ug/l 0// 00:0 Surrogate %Recovery Qualifier a,a,a-trifluorotoluene 0-0 0// 00:0 Page of //0

346 Client: AECOM Project/Site:.Hampstead.EL (MD) Client Sample ID: MW Date Collected: 0// :0 Date Received: 0// 0: Method: 0B - Volatile Organic Compounds (GC/MS) Client Sample Results RL MDL TestAmerica Job ID: 0-0- SDG: Hanover Pike, Hampstead, MD Lab Sample ID: 0-0- Benzene.00 ug/l 0// 0: Ethylbenzene Methyl tert-butyl ether Toluene Xylenes, Total Surrogate %Recovery Qualifier Unit D.00 ug/l 0// 0:.00 ug/l 0// 0:.00 ug/l 0// 0:.00 ug/l 0// 0: Dibromofluoromethane (Surr) // 0: Toluene-d (Surr) 0-0 0// 0:,-Dichloroethane-d (Surr) 0-0 0// 0: -Bromofluorobenzene (Surr) 0-0 0// 0: Method: 0C - Nonhalogenated Organics using GC/FID -Modified (Gasoline Range Organics) RL MDL Unit D Gasoline Range Organics [C - C] 0 ug/l 0// 0:0 Surrogate %Recovery Qualifier a,a,a-trifluorotoluene // 0:0 Page of //0

347 Client: AECOM Project/Site:.Hampstead.EL (MD) QC Sample Results Method: 0B - Volatile Organic Compounds (GC/MS) Lab Sample ID: MB 0-0/ Analysis Batch: 0 MB MB RL MDL TestAmerica Job ID: 0-0- SDG: Hanover Pike, Hampstead, MD Client Sample ID: Method Blank Prep Type: Total/NA Benzene.00 ug/l 0// 0: Ethylbenzene Methyl tert-butyl ether Toluene Xylenes, Total Surrogate %Recovery Unit D.00 ug/l 0// 0:.00 ug/l 0// 0:.00 ug/l 0// 0:.00 ug/l 0// 0: MB MB Qualifier Dibromofluoromethane (Surr) 0-0 0// 0: Toluene-d (Surr) 0-0 0// 0:,-Dichloroethane-d (Surr) 0-0 0// 0: -Bromofluorobenzene (Surr) 0-0 0// 0: Lab Sample ID: LCS 0-0/ Analysis Batch: 0 Spike Added LCS LCS Client Sample ID: Lab Control Sample Prep Type: Total/NA Benzene 0.0. ug/l 0-0 Ethylbenzene 0.0. ug/l 0-0 Methyl tert-butyl ether 0.0. ug/l 0-0 Toluene ug/l 0-0 Xylenes, Total 0. ug/l 0 - Unit D %Rec %Rec. Surrogate %Recovery LCS LCS Qualifier Dibromofluoromethane (Surr) 0-0 Toluene-d (Surr) 0-0,-Dichloroethane-d (Surr) 0-0 -Bromofluorobenzene (Surr) 0-0 Lab Sample ID: LCSD 0-0/ Analysis Batch: 0 Spike Added LCSD LCSD Client Sample ID: Lab Control Sample Dup Prep Type: Total/NA Benzene 0.0. ug/l 0-0 Ethylbenzene ug/l 0-0 Methyl tert-butyl ether ug/l 0-0 Toluene 0.0. ug/l 0-0 Xylenes, Total 0. ug/l 0 - Surrogate LCSD LCSD %Recovery Qualifier Dibromofluoromethane (Surr) 0-0 Toluene-d (Surr) 0-0,-Dichloroethane-d (Surr) 0-0 -Bromofluorobenzene (Surr) 0-0 Unit D %Rec %Rec. RPD RPD Limit Page of //0

348 Client: AECOM Project/Site:.Hampstead.EL (MD) QC Sample Results Method: 0B - Volatile Organic Compounds (GC/MS) (Continued) Lab Sample ID: 0-0- MS Analysis Batch: 0 Sample Sample Result Qualifier Spike Added MS MS TestAmerica Job ID: 0-0- SDG: Hanover Pike, Hampstead, MD Client Sample ID: GAC- EFF Prep Type: Total/NA Benzene 0.0. ug/l - Ethylbenzene 0.0. ug/l - Methyl tert-butyl ether 0.0. ug/l - Toluene ug/l - Xylenes, Total 0. ug/l - Surrogate %Recovery MS MS Qualifier Dibromofluoromethane (Surr) 0-0 Toluene-d (Surr) 0-0,-Dichloroethane-d (Surr) 0-0 -Bromofluorobenzene (Surr) 0-0 Lab Sample ID: 0-0- MSD Analysis Batch: 0 Sample Sample Result Qualifier Spike Added MSD MSD Unit D %Rec %Rec. Client Sample ID: GAC- EFF Prep Type: Total/NA Benzene 0.0. ug/l - 0 Ethylbenzene 0.0. ug/l - 0 Methyl tert-butyl ether 0.0. ug/l - 0 Toluene 0.0. ug/l - Xylenes, Total 0. ug/l - 0 Unit D %Rec %Rec. RPD RPD Limit Surrogate %Recovery MSD MSD Qualifier Dibromofluoromethane (Surr) Toluene-d (Surr) 0-0,-Dichloroethane-d (Surr) 0-0 -Bromofluorobenzene (Surr) 0-0 Method: 0C - Nonhalogenated Organics using GC/FID -Modified (Gasoline Range Organics) Lab Sample ID: MB 0-/ Analysis Batch: MB MB RL MDL Client Sample ID: Method Blank Prep Type: Total/NA Gasoline Range Organics [C - C] 0 ug/l 0// : Surrogate %Recovery MB MB Qualifier a,a,a-trifluorotoluene 0-0 0// : Unit D Page of //0

349 Client: AECOM Project/Site:.Hampstead.EL (MD) QC Sample Results TestAmerica Job ID: 0-0- SDG: Hanover Pike, Hampstead, MD Method: 0C - Nonhalogenated Organics using GC/FID -Modified (Gasoline Range Organics) (Continued) Lab Sample ID: LCS 0-/ Analysis Batch: Gasoline Range Organics [C - C] Surrogate %Recovery LCS LCS Qualifier Spike Added a,a,a-trifluorotoluene 0-0 Lab Sample ID: LCSD 0-/ Analysis Batch: Gasoline Range Organics [C - C] Surrogate LCSD LCSD %Recovery Qualifier LCS LCS Unit Client Sample ID: Lab Control Sample Prep Type: Total/NA 00 ug/l - 0 Spike Added a,a,a-trifluorotoluene 0-0 LCSD LCSD D %Rec %Rec. Client Sample ID: Lab Control Sample Dup Prep Type: Total/NA Unit 00 ug/l - 0 D %Rec %Rec. RPD RPD Limit Lab Sample ID: 0-0- MS Analysis Batch: Sample Sample Gasoline Range Organics [C - C] Surrogate Result %Recovery Qualifier Spike Added a,a,a-trifluorotoluene 0-0 Gasoline Range Organics [C - C] MS MS Client Sample ID: GAC- EFF Prep Type: Total/NA 00. ug/l - MS MS Qualifier Lab Sample ID: 0-0- MSD Analysis Batch: Sample Sample Surrogate Result %Recovery Qualifier Spike Added a,a,a-trifluorotoluene 0-0 MSD MSD Unit D %Rec %Rec. Client Sample ID: GAC- EFF Prep Type: Total/NA 00 0 ug/l - MSD MSD Qualifier Unit D %Rec %Rec. RPD RPD Limit Page of //0

350 QC Association Summary Client: AECOM TestAmerica Job ID: 0-0- Project/Site:.Hampstead.EL (MD) SDG: Hanover Pike, Hampstead, MD GC/MS VOA Analysis Batch: 0 Lab Sample ID Client Sample ID Prep Type Matrix Method Prep Batch 0-0- A/S INF Total/NA Water 0B 0-0- A/S EFF Total/NA Water 0B 0-0- GAC- EFF Total/NA Water 0B 0-0- GAC- FINAL Total/NA Water 0B 0-0- MW Total/NA Water 0B 0-0- MW Total/NA Water 0B 0-0- MW Total/NA Water 0B MB 0-0/ Method Blank Total/NA Water 0B LCS 0-0/ Lab Control Sample Total/NA Water 0B LCSD 0-0/ Lab Control Sample Dup Total/NA Water 0B 0-0- MS GAC- EFF Total/NA Water 0B 0-0- MSD GAC- EFF Total/NA Water 0B GC VOA Analysis Batch: Lab Sample ID Client Sample ID Prep Type Matrix Method Prep Batch 0-0- A/S INF Total/NA Water 0C 0-0- A/S EFF Total/NA Water 0C 0-0- GAC- EFF Total/NA Water 0C 0-0- GAC- FINAL Total/NA Water 0C 0-0- MW Total/NA Water 0C 0-0- MW Total/NA Water 0C 0-0- MW Total/NA Water 0C MB 0-/ Method Blank Total/NA Water 0C LCS 0-/ Lab Control Sample Total/NA Water 0C LCSD 0-/ Lab Control Sample Dup Total/NA Water 0C 0-0- MS GAC- EFF Total/NA Water 0C 0-0- MSD GAC- EFF Total/NA Water 0C Page of //0

351 Lab Chronicle Client: AECOM TestAmerica Job ID: 0-0- Project/Site:.Hampstead.EL (MD) SDG: Hanover Pike, Hampstead, MD Client Sample ID: A/S INF Lab Sample ID: 0-0- Date Collected: 0// : Date Received: 0// 0: Prep Type Batch Type Batch Method Run Dil Factor or Analyst Total/NA Analysis 0B ml ml 0 0// 0: RP TAL NSH Initial Amount Final Amount Batch Number Total/NA Analysis 0C ml ml 0// : SS TAL NSH Client Sample ID: A/S EFF Lab Sample ID: 0-0- Date Collected: 0// : Date Received: 0// 0: Prep Type Batch Type Batch Method Run Dil Factor or Analyst Total/NA Analysis 0B ml ml 0 0// 0:0 RP TAL NSH Initial Amount Final Amount Batch Number Total/NA Analysis 0C ml ml 0// 0: SS TAL NSH Client Sample ID: GAC- EFF Lab Sample ID: 0-0- Date Collected: 0// :0 Date Received: 0// 0: Lab Lab Prep Type Batch Type Batch Method Run Dil Factor or Analyst Total/NA Analysis 0B ml ml 0 0// 0: RP TAL NSH Initial Amount Final Amount Batch Number Total/NA Analysis 0C ml ml 0// 0: SS TAL NSH Lab Client Sample ID: GAC- FINAL Lab Sample ID: 0-0- Date Collected: 0// : Date Received: 0// 0: Prep Type Batch Type Batch Method Run Dil Factor or Analyst Total/NA Analysis 0B ml ml 0 0// 0: RP TAL NSH Initial Amount Final Amount Batch Number Total/NA Analysis 0C ml ml 0// : SS TAL NSH Lab Client Sample ID: MW Lab Sample ID: 0-0- Date Collected: 0// : Date Received: 0// 0: Prep Type Batch Type Batch Method Run Dil Factor or Analyst Total/NA Analysis 0B ml ml 0 0// 0: RP TAL NSH Initial Amount Final Amount Batch Number Total/NA Analysis 0C ml ml 0// : SS TAL NSH Lab Client Sample ID: MW Lab Sample ID: 0-0- Date Collected: 0// : Date Received: 0// 0: Prep Type Batch Type Batch Method Run Dil Factor or Analyst Total/NA Analysis 0B ml ml 0 0// 0: RP TAL NSH Initial Amount Final Amount Batch Number Lab Page of //0

352 Lab Chronicle Client: AECOM TestAmerica Job ID: 0-0- Project/Site:.Hampstead.EL (MD) SDG: Hanover Pike, Hampstead, MD Client Sample ID: MW Lab Sample ID: 0-0- Date Collected: 0// : Date Received: 0// 0: Prep Type Batch Type Batch Method Run Dil Factor or Analyst Total/NA Analysis 0C ml ml 0// 00:0 SS TAL NSH Initial Amount Final Amount Batch Number Client Sample ID: MW Lab Sample ID: 0-0- Date Collected: 0// :0 Date Received: 0// 0: Prep Type Batch Type Batch Method Run Dil Factor or Analyst Total/NA Analysis 0B ml ml 0 0// 0: RP TAL NSH Initial Amount Final Amount Batch Number Total/NA Analysis 0C ml ml 0// 0:0 SS TAL NSH Laboratory References: TAL NSH =, 0 Foster Creighton Drive, Nashville, TN 0, TEL ()-0 Lab Lab Page of //0

353 Client: AECOM Project/Site:.Hampstead.EL (MD) Method Summary TestAmerica Job ID: 0-0- SDG: Hanover Pike, Hampstead, MD Method Method Description Protocol Laboratory 0B Volatile Organic Compounds (GC/MS) SW TAL NSH 0C Nonhalogenated Organics using GC/FID -Modified (Gasoline Range Organics) SW TAL NSH 00B Purge and Trap SW TAL NSH Protocol References: SW = "Test Methods For Evaluating Solid Waste, Physical/Chemical Methods", Third Edition, November And Its Updates. Laboratory References: TAL NSH =, 0 Foster Creighton Drive, Nashville, TN 0, TEL ()-0 Page of //0

354 Accreditation/Certification Summary Client: AECOM TestAmerica Job ID: 0-0- Project/Site:.Hampstead.EL (MD) SDG: Hanover Pike, Hampstead, MD Laboratory: Unless otherwise noted, all analytes for this laboratory were covered under each accreditation/certification below. Authority Program EPA Region Identification Number Expiration Date Maryland State Program 0-- The following analytes are included in this report, but accreditation/certification is not offered by the governing authority: Analysis Method Prep Method Matrix 0C Water Gasoline Range Organics [C - C] 0B Water Benzene 0B Water Ethylbenzene 0B Water Methyl tert-butyl ether 0B Water Toluene 0B Water Xylenes, Total Page 0 of //0

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