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Home My WebLink About19067_Gateway Plaza_GWReport_DC920021_20191003AECOM AECOM Technical Services of North Carolina, Inc. (919) 461-1100 tel 1600 Perimeter Park Drive, Suite 400 (919) 461-1415 fax Morrisville, NC 27560 October 3, 2019 North Carolina Department of Environmental Quality Division of Waste Management — DSCA Program 1646 Mail Service Center Raleigh, NC 27699-1646 Att: Mr. Billy Meyer DSCA Project Manager Re: Analytical Data Table Report — Monitoring Well Sampling/Well Network Update T&J Cleaners DSCA Site ID DC920021 2423 Crabtree Boulevard Raleigh, Wake County, North Carolina Dear Mr. Meyer: AECOM Technical Services of North Carolina, Inc. (includes legacy URS and herein referred to as AECOM) is pleased to provide the attached Analytical Data Table Report for recently completed monitoring well sampling and well housing modifications at the T&J Cleaners facility (site) located at 2423 Crabtree Boulevard, Raleigh, Wake County, North Carolina. This work was completed in accordance with the scope of work documented in an AECOM Assessment Cost Proposal, as approved by DSCA under State Lead Authorization for Work (SLAW) 021B on July 2, 2019. On May 29, 2019, AECOM was informed by Darin McClure of Mid -Atlantic Associates, Inc. (Mid - Atlantic), the environmental consultant for the owner of the 2423 Crabtree Boulevard property, that ongoing grading activities and parking lot modifications being completed as part of site redevelopment activities could impact the existing monitoring well network. After several phone calls to the grading contractor, AECOM met the contractor onsite on June 14, 2019, to discuss the proposed activities and what impact they would have on existing monitoring wells. While onsite, AECOM located four monitoring wells in the parking lot (MW-5, MW-12, MW-13, and DMW-18), but could not locate monitoring wells MW-6, MW-7, and MW-15, as it was evident that some construction activities and grading had already occurred in the areas where these monitoring wells were located. AECOM provided the grading contractor a copy of the monitoring well location map (included as Attachment 4), as well as GPS coordinates for the missing monitoring wells so they could attempt to locate the wells during the next phase of grading activities. The planned grading activities were slated for the week of July 8, 2019 and the grading contractor asked for the site monitoring wells located in the parking lot to be raised by at least 6 inches to accommodate new site grading elevations. AECOM and DSCA discussed the planned site grading activities (i.e., scope and schedule) and the likelihood that the missing monitoring wells would get, or already had been damaged/destroyed, as part of the site improvements. As these site monitoring wells have been sampled at least eight times over the last decade and the chlorinated solvent contaminant plume appears to be stable, optimization to the monitoring well network was proposed. Therefore, costs were provided for a licensed North Carolina driller to mobilize to the site and abandon monitoring wells MW-6, MW-7, and MW-15, if located, and modify monitoring wells MW-5, MW-12, MW-13, and DMW-18. Prior to well abandonment activities, AECOM proposed the collection of groundwater samples from all site monitoring wells for analysis of total manganese and total iron, as these constituents have not been monitored as frequently as the dissolved phase volatile organic compounds (VOC) at the site and their presence, magnitude, and distribution are important in evaluating secondary impacts to groundwater AECOM Mr. Billy Meyer T&J Cleaners — DC920021 October 3, 2019 Page 2 of 2 quality attributed to a potassium permanganate injection completed in 2015, as part of the site remediation activities. On June 26, 2019, AECOM deployed HydraSleeves in all site monitoring wells, except for monitoring wells MW-6, MW-7, MW-15, MW-16, and DMW-18, which could not be located due to parking lot construction activities. On June 28, 2019, AECOM returned to the site to complete the comprehensive groundwater gauging and sampling event for iron and manganese via the HydraSleeves previously deployed. As shown on Attachment 7, elevated iron and manganese concentrations are prevalent across the site, including upgradient monitoring wells MW-3 and MW-11, which should not have been affected by the potassium permanganate injection. Manganese and iron concentrations were the most elevated at the potassium permanganate injection area near MW-2 in the rear of the former drycleaner at 521,000 micrograms per liter (ug/L) and 105,000 ug/L, respectively. `Background" manganese concentrations at upgradient monitoring wells MW-3 and MW-I I were 55.7 and 145 ug/L, respectively, which is higher than the NC 2L Groundwater Quality Standard of 50 ug/L for manganese. Site concentrations of manganese ranged from 18.4 to 2,040 ug/L and iron concentrations ranged from 562 to 58,400 ug/L in downgradient/cross gradient shallow monitoring wells, as shown on Attachment 7. Additionally, on July 1, 2019, AECOM oversaw well repair activities by a licensed North Carolina driller of site monitoring wells MW-1R, MW-5, MW-12, MW-13, and DMW-18 to match the proposed grade of the new parking lot. Monitoring wells MW-6, MW-7, MW-15, and MW-16 are assumed to have been destroyed by parking lot renovations and could not be located for proper abandonment by a licensed driller. Documentation of the wells before and after the repairs can be found in the attached photo log, included as Attachment 17. If you have any questions or require additional information, please do not hesitate to call either Rob MacWilliams at (704) 499-4839 or Carlin Slusher at (919) 461-1341. Sincerely, AECOM TECHNICAL SERVICES OF NORTH CAROLINA, INC. Carlin E. Slusher Project Manager Enclosures Robert H. MacWilliams, PG Program Manager Analytical Data Tables for North Carolina Dry -Cleaning Solvent Cleanup Act Program Facility Name: T & J Cleaners 2423 Crabtree Boulevard, Raleigh, NC DSCA ID No.: DC920021 Submittal Date: 10/3/2019 Prepared By: AECOM Technical Services of North Carolina, Inc. Carlin Slusher and Robert H. MacWilliams, PG Table of Contents DSCA ID No.: DC920021 Table/ Aft. No. Description Check box if included Tables Table 1 Site Chronology 0 Table 2 Analytical Data for Soil ❑ Table 3 Analytical Data for Sub -slab Gas ❑ Table 4 Analytical Data for Soil Gas ❑ Table 5 Analytical Data for Indoor and Outdoor Air ❑ Table 6 Monitoring Well Construction Data 0 Table 7 Groundwater Elevation Data 0 Table 8 Analytical Data for Groundwater 0 Table 9 Analytical Data for Surface Water ❑ Table 10 Water Well(s) Survey Data ❑ Table 11 Analytical Data for Water Supply Well(s) ❑ Table 12 Analytical Data for Natural Attenuation Parameters ❑ Attachments Att. 1 Site map showing location(s) of soil boring(s). ❑ Att. 2 Soil contaminant concentration maps showing the concentration at each sampling point. ❑ Att. 3 Soil isoconcentration maps. ❑ Att. 4 Site map showing location(s) of monitoring well(s). 0 Att. 5 Well completion diagrams and records of construction submitted to state. ❑ Att. 6 Groundwater gradient map for each sampling event. 0 Att. 7 PCE concentration map showing the concentration at each sampling point and isoconcentration map. However, if there are significant plumes for other dry- cleaning contaminants, contaminant concentration maps for each chemical of concern should be included. 0 Att. 8 Groundwater concentration trend plots. ❑ Att. 9 Map showing location(s) of surface water sample(s) (if applicable). ❑ Att. 10 Surface water concentration map showing the concentration at each sampling point (if applicable). ❑ Att. 11 USGS Quad map with plotted water well location(s) within the 1,500 foot and 0.5 mile radii of the site (if applicable). ❑ Att. 12 Site map showing location(s) of monitoring well(s) for natural attenuation parameb ❑ Att. 13 Site map showing location(s) of indoor air, outdoor air, or soil gas samples. ❑ Att. 14 Air and soil gas concentration map showing the concentration at each sampling point. ❑ Att.15 Signed laboratory analytical reports including chain -of custody and quality assurance/quality control (QA/QC) documentation (only if not previously submitted). 0 Att. 16 Site Location Map 0 Att. 17 Photographic Log 0 Att. 18 ❑ Att. 19 ❑ Att. 20 ❑ Att. 21 Note: 1. All maps must include a bar scale, north arrow, site name, DSCA ID No., and date. ❑ Table 1: Site Chronology DSCA ID No.: DC920021 Chronology of Events Instructions: Brief description of all significant events that have occurred since a problem was Date suspected at the facility. Commence with the first date a problem was suspected and continue through the most recent activity described in the current report. November 2002 DL Restoration, LLC conducted a Phase I Environmental Site Assessment (ESA) at Gateway Plaza and reported stained soils in the courtyard behind the dry cleaner and noted the presence of several drums. Ed Aguirre & Associates, Inc. (Aguirre) conducted a Limited Soil & GW Assessment, which included the advancement of December 2002 five soil borings and the installation and sampling of a temporary well in the vicinity of the soil boring that had the highest PID detection. March 2003 Meredith College completes DSCA Petition Questionaire. Earth Tech installed three Type II monitoring wells (MW-1, MW-2, MW-3) and sampled MW-2 and MW-3 for VOC November 2003 analysis by SW-846 826013. A groundwater sample was not collected at MW-1 due to the well being dry. Earth Tech also collected and submitted soil samples at each well for VOC analysis. December 2003 T&J Cleaners is petitioned into the DSCA program. December 6 & 7, MacTec abandoned MW-1 and installed three Type II shallow monitoring wells (MW-1R, MW-4, MW-5). All site wells 2005 (MW-lR to MW-5) are sampled and submitted to the laboratory for VOC analysis. MacTec advanced 14 soil borings in the courtyard, three borings in front of store, and collected samples for VOC June 7-9, 2006 analysis. MacTec also installed/sampled six Type II shallow monitoring wells (MW-6 to MW-12). Three surface water samples were collected and submitted for VOC analysis (SW-1 to SW-3). January 9 to 11, 2007 MacTec installed/sampled two Type II shallow monitoring wells (MW-13, MW-14) for VOC analysis. MacTec also sampled four surface water samples (SW-1 to SW-4). March 2008 MacTec conducted pre -injection sampling at MW-1R to MW-14 for VOC analysis. MacTec installed one Type II shallow monitoring well, MW-15, and collected SW samples. April 18, 2008 MacTec resampled MW-5, MW-6, and MW-15 due to abnormal laboratory results. April 24, 2008 MacTec injected Regenesis HRC A into four injections points near MW-15. May 2008 MacTec sampled MW-15 for total organic carbon (TOC), methane, ethane, ethene (MEE), sulfate, nitrate, nitrite, iron, and manganese. June 2008 MacTec submited Injection Event Record to NCDENR Aquifer Protection Section and sampled MW-15 for TOC, MEE, sulfate, nitrate, nitrite, iron, and manganese. MacTec conducted first quarterly sampling event, which included the sampling of MW-1R to MW-15 for VOC analysis July 2008 (samples also submitted TOC, MEE, nitrate, sulfate, nitrite, iron, manganese for MW-15) and the collection of surface water samples (SW-1 to SW-4). Page 3 of 38 Table 1: Site Chronology DSCA ID No.: DC920021 Chronology of Events Date Instructions: Brief description of all significant events that have occurred since a problem was suspected at the facility. Commence with the first date a problem was suspected and continue through the most recent activity described in the current report. August 2008 MacTec samples MW-15 for TOC. September 2008 MacTec samples MW-15 for TOC. October 2008 MacTec samples MW-15 for TOC. November 2008 MacTec conducted second quarterly sampling event, which included the sampling of MW-1R to MW-15 for VOC analysis (samples also submitted TOC, MEE, nitrate, sulfate, nitrite, iron, manganese for MW-15) and the collection of surface water samples (SW-1 to SW-4). January 2009 MacTec conducted third quarterly sampling event, which included the sampling of MW-1R to MW-15 for VOC analysis (samples also submitted TOC, MEE, nitrate, sulfate, nitrite, iron, manganese for MW-15) and the collection of surface water samples (SW-1 to SW-4). February 2009 MacTec samples MW-15 for TOC. March 2009 MacTec samples MW-15 for TOC. April 28-29, 2009 MacTec conducted fourth quarterly sampling event, which included the sampling of MW-1R to MW-15 for VOC analysis (samples also submitted TOC, MEE, nitrate, sulfate, nitrite, iron, manganese for MW-15) and the collection of surface water samples (SW-1 to SW-4). January 18 to 27, 2010 URS installed two shallow Type II wells (MW-16 & MW-17) and one Type III well (DMW-18), advanced 12 soil borings, collected four surface water samples, six Henry Push Point samples, two soil gas samples, one subslab sample, and completed sitewide GW gauging/sampling/survey. July 1, 2010 URS collected five indoor air samples from adjacent tenant spaces and one ambient air sample. July 6, 2010 URS collected five subslab samples from adjacent tenant spaces. February 4 & 5, 2011 URS completed fugitive emissions study in T&J Cleaners and two adjacent tenant spaces. May 2012 T&J Cleaners vacates tenant space. August 7 & 8, 2012 URS collected four indoor air samples from adjacent tenant spaces and former dry cleaner. URS collects six additional soil samples (S13-1 to S13-6) to further delienate soil contamination. Page 4 of 38 Table 1: Site Chronology DSCA ID No.: DC920021 Chronology of Events Instructions: Brief description of all significant events that have occurred since a problem was Date suspected at the facility. Commence with the first date a problem was suspected and continue through the most recent activity described in the current report. November 9 & 13, URS completes indoor air and sub -slab vapor sampling at Arrow Pawn. 2012 December 12 & 13, URS completes site -wide gauging event, samples select monitoring wells, collects surface water samples, collects indoor 2012 air sample at former dry cleaner, and attempts to collect an off -site soil gas sample. December 21, 2012 URS collects a soil gas sample at 2424 Crabtree Boulevard. March 29, 2013 URS completes indoor air sampling at former dry cleaner and three adjacent tenant spaces. URS attempts the installation of five V temporary well points (TW-1 to TW-5) around the source area in the courtyard to April 22 & 23, 2013 evaluate the extent of grossly contaminated perched water. Groundwater samples were collected from three well points and soil samples were collected from all well points. July 14-16, 2015 URS oversees the installation of three horizontal subslab depressurization (SSD) system lines beneath the rear of the former drycleaner. July 20-23, 2015 URS oversees injection of liquid potassium permanganate in the courtyard area. Daylighting occurs in the middle of the courtyard. A total of 1,052.5 gallons of injectate slung containing 1,559 pounds of potassium permanganate are utilized. September 17-19, URS oversees application of granular potassium permanganate in the courtyard area via surficial trenching and borehole 2015 advancement to 5 feet below ground surface. A total of 2,441 pounds of potassium permanganate were applied to the trenches and boreholes. November 2015 to The SSD system equipment is delivered to the site, the system equipment pad is constructed, City of Raleigh permits are January 2016 obtained, electrical modifications are completed, and the SSD system piping is connected to the SSD equipment cabinet. February 3, 2016 The SSD system is started up. The SSD system accumulates water after a significant rain event on February 4, 2016. The flow is reduced to minimize February 4-29, 2016 water accumulation. URS oversees the modification of the SSD system piping, which included a 2-inch diameter slotted screen piping installed within the 4-inch diameter system piping to reduce the amount of sediment/fines entering the SSD system piping. All wells are redeveloped. March 3, 2016 URS oversees the completion of a comprehensive groundwater gauging event, a limited groundwater sampling event of select site wells, and waste pickup. URS also completes operation and maintenance (O&M) on the SSD system. March 8, 2016 URS performs additional O&M on the SSD system. URS attempts to collect three indoor air samples from the former dry cleaner and two adjacent tenant spaces (Shear Shack March 17, 2016 and Beauty Supply); however, an open door is observed halfway through indoor air sampling and recollection is discussed with DSCA. Page 5 of 38 Table 1: Site Chronology DSCA ID No.: DC920021 Chronology of Events Instructions: Brief description of all significant events that have occurred since a problem was Date suspected at the facility. Commence with the first date a problem was suspected and continue through the most recent activity described in the current report. March 22, 2016 URS successfully collects three 8-hour indoor air samples from the following tenant spaces: the former dry cleaner (Bid Rite Sweepstakes), Shear Shack, and Beauty Mega Store. March 31, 2016 URS performs O&M on the SSD system. April 28, 2016 URS performs O&M on the SSD system. May 4-6, 2016 URS oversees installation of new guttering in courtyard area at rear of the former dry cleaner, URS mobilizes to remove water from the SSD system, and restart the blower. June 10-14, 2016 URS performs O&M on the SSD system after removing water from the moisture separator. July 1-6, 2016 The SSD system is restarted after removing water from the moisture separator. July 18, 2016 The SSD system is restarted after removing water from the moisture separator. August 15-19, 2016 URS oversees courtyard paving to reduce the amount of water accumulation in the SSD system lines. URS performs O&M on the SSD system. September 23, 2016 URS performs O&M on the SSD system and seals a small crack in the former dry cleaner. September 26, 2016 URS collects three 8-hour indoor air samples from the following tenant spaces: the former dry cleaner (vacant), Shear Shack, and the former Beauty Mega Store (vacant). October 8, 2016 The SSD system accumulates water in the moisture separator after 12" of rain is received during a hurricane. URS will not restart the system until the former dry cleaning tenant space is occupied again, as discussed with DSCA. March 22, 2017 AECOM oversees the completion of a comprehensive groundwater gauging event and limited groundwater sampling event of select site wells. June 21, 2017 AECOM collects three 8-hour indoor air samples from the following tenant spaces: the former dry cleaner (vacant), Shear Shack, and the former Beauty Mega Store (vacant). The SSD system was not operational at this time. July 7-10, 2017 AECOM restarts the system and completes routine maintenance. July 14, 2017 AECOM completes a radius of influence and step test on the system. July 18, 2017 AECOM collects three 8-hour indoor air samples from the following tenant spaces: the former dry cleaner (vacant), Shear Shack, and the former Beauty Mega Store (vacant). The SSD system was operational at this time. AECOM collects two 8-hour indoor air samples from the following tenant spaces: the former dry cleaner (vacant) and the July 27, 2017 former Beauty Mega Store (vacant). Additionally, two subslab vapor samples are collected from beneath the former beauty supply store. The SSD system was operational at this time. Page 6 of 38 Table 1: Site Chronology DSCA ID No.: DC920021 Chronology of Events Instructions: Brief description of all significant events that have occurred since a problem was Date suspected at the facility. Commence with the first date a problem was suspected and continue through the most recent activity described in the current report. August 1, 2017 AECOM collects one 8-hour indoor air sample from the Shear Shack. The SSD system was operational at this time. November 28, 2017 AECOM collects three 8-hour indoor air samples from the following tenant spaces: the former dry cleaner (vacant), Shear Shack, and the former Beauty Mega Store (vacant). The SSD system was operational at this time. July 2017 - February Routine O&M performed on the SSD system. 2019 AECOM collects one 8-hour indoor air sample from the former drycleaner (currently Craft Habit) and collects one effluent April 3, 2019 sample (EFF-1). After sample collection, the SSD system was turned off and two Austin AirSystems HealthMate portable air filtrations units deployed in the Craft Habit tenants ace. April 24, 2019 After two weeks of air filtration unit operation, AECOM collects one 8-hour indoor air sample from the former drycleaner (currently Craft Habit) to confirm effficacy of the portable air filtration units. June 17, 2019 AECOM collects seven subslab vapor samples (SSV-1 to SSV-5 and SSV-12 to SSV-13) from various tenant spaces within the Gateway Plaza. SSV-9 not collected due to a summa canister malfunction. AECOM collects one indoor air sample from the former Shear Shack/Institute of Divine Metaphysical Research (currently June 26, 2019 Mordecai Beverage Company). AECOM deploys Hydrasleeves in all site monitoring wells, except for MW-6, MW-7, MW-15, MW-16, and DMW-18, which could not be located due to parking lot construction activities. June 28, 2019 AECOM completes a comprehensive groundwater gauging and sampling event for iron and manganese via Hydrasleeves deployed on June 26, 2019. AECOM collects five subslab vapor samples (SSV-6 to SSV-8 and SSV-10 to SSV-11) from various tenant spaces within July 1, 2019 the Gateway Plaza. Well modifications (i.e., well pad repair) completed by a NC -licensed driller at MW-1R, MW-5, MW- 12, MW-13, and DMW-18 due to parking lot construction activities. Monitoring wells MW-6, MW-7, MW-15, and MW- 16 could not be located for proper abandonment. Page 7 of 38 Table 6: Monitoring Well Construction Data DSCA ID No.: DC920021 Well ID Date Installed (mm/dd/yy) Number of Samples Well Depth [feet] Well Diameter [inch] Screen Interval [feet] Status (Active/Inactive) NW-1 11/17/03 0 15 2 5-15 Inactive NM-1R 12/6/05 12 30 2 10-30 Active NW-2 11/17/03 12 8 2 3-8 Active MW-3 11/17/03 14 25 2 10-25 Active NW-4 12/6/05 12 20 2 5-20 Active MW-5 12/6/05 13 20 2 5-20 Active MW-6 6/7/06 8 22 2 12-22 Inactive MW-7 6/7/06 10 25 2 15-25 Inactive MW-8 6/7/06 11 25 2 15-25 Active MW-9 6/8/06 11 25 2 15-25 Active NW-10 6/8/06 10 25 2 15-25 Active NW-11 6/9/06 8 50 2 30-50 Active NW-12 6/8/06 11 55 2 50-55 Active NW-13 1/11/07 11 65 2 60-65 Active MW-14 1/10/07 10 25 2 10-25 Active MW-15 3/21/08 7 22 2 12-22 Inactive MW-16 1/19/10 1 25 2 15-25 Inactive MW-17 1/20/10 3 65 2 60-65 Active DMW-18 1/20/10 2 90 2 85-90 Active TW-1 4/22/13 0 13 1 3-13 Inactive TW-2 4/22/13 1 8 1 3-8 Inactive TW-3 4/22/13 1 8 1 3-8 Inactive TW-4 4/23/13 1 8 1 3-8 Inactive TW-5 4/23/13 0 5 1 3-5 Inactive off - Page 8 of 38 Table 7: Groundwater Elevation Data DSCA ID No.: DC920021 Groundwater Sampling Point Sampling Date (mm/dd/yy) TOC Elevation [feet] Depth to Water [feet bgs] Groundwater Elevation [feet] Depth to NAPL [feet bgs] NAPL Thickness [feet] Corrected* Groundwater Elevation [feet] MW-1R 1/22/2010 207.51 18.27 189.24 NA NA 189.24 MW-1R 12/13/2012 207.51 18.65 188.86 NA NA 188.86 MW-1R 3/3/2016 207.51 17.66 189.85 NA NA 189.85 MW-1R 3/22/2017 207.51 17.84 189.67 NA NA 189.67 MW-1R 6/28/2019 207.51 16.73 190.78 NA NA 190.78 NW-2 1/22/2010 209.01 3.49 205.52 NA NA 205.52 NW-2 12/13/2012 209.01 5.05 203.96 NA NA 203.96 NW-2 3/3/2016 209.01 4.21 204.80 NA NA 204.80 NW-2 3/22/2017 209.01 Dry NW-2 6/28/2019 209.01 6.80 202.21 NA NA 202.21 MW-3 1/22/2010 208.77 18.76 190.01 NA NA 190.01 MW-3 12/13/2012 208.77 31.95 176.82 NA NA 176.82 MW-3 3/3/2016 208.77 17.18 191.59 NA NA 191.59 MW-3 3/22/2017 208.77 17.75 191.02 NA NA 191.02 MW-3 6/28/2019 208.77 15.15 193.62 NA NA 193.62 MW-4 1/22/2010 200.84 11.68 189.16 NA NA 189.16 MW-4 12/13/2012 200.84 11.78 189.06 NA NA 189.06 MW-4 3/3/2016 200.84 11.57 189.27 NA NA 189.27 MW-4 3/22/2017 200.84 11.55 189.29 NA NA 189.29 MW-4 6/28/2019 200.84 11.50 189.34 NA NA 189.34 MW-5 1/22/2010 203.45 14.70 188.75 NA NA 188.75 MW-5 12/13/2012 203.45 14.96 188.49 NA NA 188.49 MW-5 3/3/2016 203.45 14.38 189.07 NA NA 189.07 MW-5 3/22/2017 203.45 14.48 188.97 NA NA 188.97 MW-5 6/28/2019 203.45 13.98 189.47 NA NA 189.47 MW-6 1/22/2010 204.55 15.49 189.06 NA NA 189.06 MW-6 12/13/2012 204.55 15.79 188.76 NA NA 188.76 MW-6 3/3/2016 204.55 14.85 189.70 NA NA 189.70 Page 9 of 38 Table 7: Groundwater Elevation Data DSCA ID No.: DC920021 Groundwater Sampling Point Sampling Date (mm/dd/yy) TOC Elevation [feet] Depth to Water [feet bgs] Groundwater Elevation [feet] Depth to NAPL [feet bgs] NAPL Thickness [feet] Corrected* Groundwater Elevation [feet] MW-6 3/22/2017 204.55 15.15 189.40 NA NA 189.40 MW-7 1/22/2010 208.11 18.15 189.96 NA NA 189.96 MW-7 12/13/2012 208.11 19.55 188.56 NA NA 188.56 MW-7 3/3/2016 208.11 16.12 191.99 NA NA 191.99 MW-7 3/22/2017 208.11 17.20 190.91 NA NA 190.91 MW-8 1/22/2010 207.18 18.69 188.49 NA NA 188.49 MW-8 12/13/2012 207.18 20.03 187.15 NA NA 187.15 MW-8 3/3/2016 207.18 18.21 188.97 NA NA 188.97 MW-8 3/22/2017 207.18 19.28 187.90 NA NA 187.90 MW-8 6/28/2019 207.18 17.87 189.31 NA NA 189.31 MW-9 1/22/2010 201.63 13.11 188.52 NA NA 188.52 MW-9 12/13/2012 201.63 14.24 187.39 NA NA 187.39 MW-9 3/3/2016 201.63 15.32 186.31 NA NA 186.31 MW-9 3/22/2017 201.63 15.18 186.45 NA NA 186.45 MW-9 6/28/2019 201.63 13.56 188.07 NA NA 188.07 NM-10 1/22/2010 208.07 18.55 189.52 NA NA 189.52 MW-10 12/13/2012 208.07 18.87 189.2 NA NA 189.2 MW-10 3/3/2016 208.07 18.01 190.06 NA NA 190.06 MW-10 3/22/2017 208.07 18.25 189.82 NA NA 189.82 MW-10 6/28/2019 208.07 17.18 190.89 NA NA 190.89 MW-11 1/22/2010 221.54 31.34 190.2 NA NA 190.2 MW-11 12/13/2012 221.54 DRY DRY NA NA DRY MW-11 3/3/2016 221.54 29.21 192.33 NA NA 192.33 MW-11 3/22/2017 221.54 29.95 191.59 NA NA 191.59 MW-11 6/28/2019 221.54 26.75 194.79 NA NA 194.79 MW-12 1/22/2010 207.51 18.25 189.26 NA NA 189.26 NM-12 12/13/2012 207.51 18.94 188.57 NA NA 188.57 Page 10 of 38 Table 7: Groundwater Elevation Data DSCA ID No.: DC920021 Groundwater Sampling Point Sampling Date (mm/dd/yy) TOC Elevation [feet] Depth to Water [feet bgs] Groundwater Elevation [feet] Depth to NAPL [feet bgs] NAPL Thickness [feet] Corrected* Groundwater Elevation [feet] NM-12 3/3/2016 207.51 17.42 190.09 NA NA 190.09 MW-12 3/22/2017 207.51 17.80 189.71 NA NA 189.71 MW-12 6/28/2019 207.51 16.30 191.21 NA NA 191.21 MW-13 1/22/2010 203.47 14.80 188.67 NA NA 188.67 MW-13 12/13/2012 203.47 16.39 187.08 NA NA 187.08 MW-13 3/3/2016 203.47 14.56 188.91 NA NA 188.91 MW-13 3/22/2017 203.47 14.65 188.82 NA NA 188.82 MW-13 6/28/2019 203.47 14.04 189.43 NA NA 189.43 MW-14 1/22/2010 204.38 15.67 188.71 NA NA 188.71 MW-14 12/13/2012 204.38 15.96 188.42 NA NA 188.42 MW-14 3/3/2016 204.38 15.39 188.99 NA NA 188.99 MW-14 3/22/2017 204.38 15.79 188.59 NA NA 188.59 MW-14 6/28/2019 204.38 15.61 188.77 NA NA 188.77 MW-15 1/22/2010 202.45 13.21 189.24 NA NA 189.24 MW-15 12/13/2012 202.45 13.51 188.94 NA NA 188.94 MW-15 3/3/2016 202.45 12.84 189.61 NA NA 189.61 MW-15 3/22/2017 202.45 12.95 189.50 NA NA 189.50 MW-16 1/22/2010 209.09 18.85 190.24 NA NA 190.24 MW-16 12/13/2012 209.09 20.60 188.49 NA NA 188.49 MW-16 3/3/2016 209.09 16.00 193.09 NA NA 193.09 MW-16 3/22/2017 209.09 17.50 191.59 NA NA 191.59 MW-17 1/22/2010 209.95 21.93 188.02 NA NA 188.02 MW-17 12/13/2012 209.95 23.47 186.48 NA NA 186.48 MW-17 3/3/2016 209.95 22.18 187.77 NA NA 187.77 MW-17 3/22/2017 209.95 22.97 186.98 NA NA 186.98 MW-17 6/28/2019 209.95 22.18 187.77 NA NA 187.77 DMW-18 1/27/2010 207.54 18.47 189.07 NA NA 189.07 Page 11 of 38 Table 7: Groundwater Elevation Data DSCA ID No.: DC920021 Groundwater Sampling Point Sampling Date (mm/dd/yy) TOC Elevation [feet] Depth to Water [feet bgs] Groundwater Elevation [feet] Depth to NAPL [feet bgs] NAPL Thickness [feet] Corrected* Groundwater Elevation [feet] DMW-18 12/13/2012 207.54 18.82 188.72 NA NA 188.72 DMW-18 3/3/2016 207.54 17.92 189.62 NA NA 189.62 DMW-18 3/22/2017 207.54 18.15 189.39 NA NA 189.39 TW-1 4/23/2013 NS Dry NA NA NA NA TW-2 4/23/2013 NS 6.16 NA NA NA NA TW-3 4/23/2013 NS 4.86 NA NA NA NA TW-4 4/23/2013 NS 6.38 NA NA NA NA TW-5 4/23/2013 NS Dry NA NA NA NA *NS - Not Surveyed Page 12 of 38 Table 8: Analytical Data for Groundwater DSCA ID No.: DC920021 O O � O O O O Z > I>C N N U I I I N I [mg/L] t7 TMW-1 12/17/2002 <10 <10 <10 <10 <50 170 <50 <10 <10 <10 <30 <10 NA <10 <10 NA <10 <10 <10 <10 MW-1R 12/7/2005 <0.005 0.788 <0.005 NA NA 0.906 <0.005 0.0075 1.21 0.221 <0.005 <0.005 <0.050 <0.005 <0.010 <0.100 <0.005 <0.005 <0.005 <0.005 MW-1R 6/9/2006 <0.125 1.49 <0.125 <0.125 <0.125 1.61 <0.125 <0.125 2.58 0.319 <0.375 <0.125 <0.625 <0.125 <0.125 <3.130 <0.125 <0.125 <0.125 <0.125 0004 0.0004 0.0004 0.0004 0.0003 MW-1R 3/21/2008 <0.001 1.1 <0.001 <0.001 <0.001 0.61 0.01 1.6 0.27 0.027 <0.001 <0.005 <0.001 <0.001 <0.001 <0.001 J 4 J 6 J 2 J MW-1R 7/24/2008 <0.020 0.52 <0.020 <0.020 <0.020 0.049 <0.020 <0.020 0.84 0.085 <0.020 <0.020 <0.100 <0.020 <0.020 <0.100 <0.020 <0.020 <0.020 <0.020 MW-1R 11/6/2008 <0.020 0.76 <0.020 <0.020 <0.020 0.024 <0.020 <0.020 0.65 0.16 <0.020 <0.020 <0.100 <0.020 <0.020 <0.100 <0.020 <0.020 <0.020 <0.020 0.0071 MW-1R 1/27/2009 <0.010 0.9 <0.010 <0.010 <0.010 0.12 <0.010 1.1 0.18 <0.010 <0.010 <0.050 <0.010 <0.010 <0.050 <0.010 <0.010 <0.010 <0.010 MW-1R 4/29/2009 <0.010 0.64 <0.010 <0.010 <0.010 0.06 <0.010 <0.010 0.21 0.069 <0.010 <0.010 <0.050 <0.010 <0.010 <0.050 <0.010 <0.010 <0.010 <0.010 0.0081 MW-1R 1/22/2010 <0.010 2 <0.010 <0.010 <0.010 0.2 <0.010 0.28 0.19 <0.010 <0.010 <0.050 <0.010 <0.010 <0.050 <0.010 <0.010 <0.010 <0.010 < < < < < 0.0007 < < < < < < < < < < MW-1R 12/13/2012 0.18 0.0089 0.02 0.065 0.0010 0.0010 0.0010 0.0010 0.0010 6 J 0.0030 0.0010 0.0050 0.0010 0.0010 0.0050 0.0010 0.0010 0.0010 0.0010 MW-1R 3/3/2016 < 0.64 < < < 0.052 < 0.0037 0.16 0.19 < < < < < < < < 0.0017 < 0.00101 0.0010 10.0010 0.0010 1 0.0010 0.0030 10.0010 0.0050 10.0010 0.0010 10.0050 0.0010 10.0010 0.0010 0.0077 0.0067 MW-1R 3/22/2017 < 0.010 3.1 <0.010 <0.010 <0.010 0.67 < 0.010 0.78 0.13 < 0.030 < 0.010 < 0.050 < 0.010 < 0.010 < 0.050 < 0.010 < 0.010 < 0.010 MW-1R 6/28/2019 NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA MW-2 11/18/2003 <0.8 <0.8 <0.8 <0.8 <0.8 15 <0.8 <0.8 0.95 <0.8 <2.4 <0.8 <4.0 <0.8 <0.8 <20 <0.8 <0.8 <0.8 <0.8 MW-2 5/2/2005 NA <2 <2 NA NA 190 <2 <2 <2 <2 <6 <2 <10 <2 <4 <10 <2 NA NA <2 Page 13 of 38 Table 8: Analytical Data for Groundwater DSCA ID No.: DC920021 O O � O O O O V Z > I>C N N U I I I N I [mg/L] t7 MW-2 12/7/2005 <0.005 0.062 0.023 NA NA 681 <0.005 <0.005 4.7 <0.01 0.018 0.013 <0.050 <0.005 <0.010 <0.100 <0.005 <0.005 <0.005 <0.005 MW-2 6/9/2006 <2 <2 <2 <2 <2 89.1 <2 <2 <2 <2 <6 <2 <10 <2 <2 <50 <2 <2 <2 <2 MW-2 3/21/2008 <0.500 <0.500 <0.500 <0.500 <0.500 100 <0.500 <0.500 0.180 J <0.500 <0.500 <0.500 <2.5 <0.500 <0.500 <2.5 <0.500 <0.500 <0.500 <0.500 MW-2 7/24/2008 <1.0 <1.0 <1.0 <1.0 <1.0 97 <1.0 <1.0 <1.0 <1.0 <1.0 <1.0 <5.0 <1.0 <1.0 <5.0 <1.0 <1.0 <1.0 <1.0 MW-2 11/6/2008 <1.00 <1.00 <1.00 <1.00 <1.00 93 <1.00 <1.00 <1.00 <1.00 <1.00 <1.00 <5.00 <1.00 <1.00 <5.00 <1.00 <1.00 <1.00 <1.00 MW-2 1/27/2009 <1.00 <1.00 <1.00 <1.00 <1.00 150 <1.00 <1.00 0.430 J <1.00 <1.00 <1.00 <5.00 <1.00 <1.00 <5.00 <1.00 <1.00 <1.00 <1.00 MW-2 4/29/2009 <2.0 <2.0 <2.0 <2.0 <2.0 120 <2.0 <2.0 <2.0 <2.0 <2.0 <2.0 <10 <2.0 <2.0 <10 <2.0 <2.0 <2.0 <2.0 MW-2 1/22/2010 < 1.0 < 1.0 < 1.0 < 1.0 < 1.0 250 < 1.0 < 1.0 < 1.0 < 1.0 < 1.0 < 1.0 < 5.0 < 1.0 < 1.0 < 5.0 < 1.0 < 1.0 < 1.0 < 1.0 MW-2 12/12/2012 <2.0 <2.0 <2.0 <2.0 <2.0 88 <2.0 <2.0 <2.0 <2.0 <6.0 <2.0 <10.0 <2.0 <2.0 <10.0 <2.0 <2.0 <2.0 <2.0 MW-2 3/3/2016 <0.10 <0.10 <0.10 <0.10 <0.10 0.063J <0.10 <0.10 <0.10 <0.10 <0.30 <0.10 <0.50 <0.10 <0.10 <0.50 <0.10 <0.10 <0.10 <0.10 MW-2 6/28/2019 NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.003 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 MW-3 11/18/2003 <0.005 <0.025 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 MW-3 5/2/2005 NA <0.001 <0.001 NA NA <0.003 <0.001 <0.001 <0.001 <0.001 <0.003 <0.001 <0.020 <0.001 <0.002 <0.020 <0.001 NA NA <0.001 MW-3 12/7/2005 <0.005 <0.005 <0.005 NA NA 0.037 <0.005 <0.005 <0.005 <0.01 <0.005 <0.005 <0.050 <0.005 <0.010 <0.100 <0.005 <0.005 <0.005 <0.005 MW-3 6/9/2006 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.003 <0.001 <0.005 <0.001 <0.001 <0.025 <0.001 <0.001 <0.001 <0.001 0.0007 MW-3 3/21/2008 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.005 <0.001 <0.001 <0.005 <0.001 <0.001 <0.001 <0.001 91 Page 14 of 38 Table 8: Analytical Data for Groundwater DSCA ID No.: DC920021 O O � O O O O V Z > N N U I I I N I [mg/L] t7 0.0007 MW-3 7/24/2008 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.005 <0.001 <0.001 <0.005 <0.001 <0.001 <0.001 <0.001 91 0.0005 MW-3 11/6/2008 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.005 <0.001 <0.001 <0.005 <0.001 <0.001 <0.001 <0.001 0.0008 MW-3 1/27/2009 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.005 <0.001 <0.001 <0.005 <0.001 <0.001 <0.001 <0.001 0.0008 MW-3 4/29/2009 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.005 <0.001 <0.001 <0.005 <0.001 <0.001 <0.001 <0.001 < < < < < 0.0007 < < < < < < < < < < < < < < MW-3 1/22/2010 0.0010 0.0010 0.0010 0.0010 0.0010 4 J 0.0010 0.0010 0.0010 0.0010 0.0010 0.0010 0.0050 0.0010 0.0010 0.0050 0.0010 0.0010 0.0010 0.0010 MW-3 12/13/2012 < < < < < < < < < < < < < < < < < < < < 0.0010 0.0010 0.0010 0.0010 0.0010 0.0010 0.0010 0.0010 0.0010 0.0010 0.0030 0.0010 0.0050 0.0010 0.0010 0.0050 0.0010 0.0010 0.0010 0.0010 MW-3 3/3/2016 < < < < < < < < < < < < < < < < < < < < 0.0010 0.0010 0.0010 0.0010 0.0010 0.0010 0.0010 0.0010 0.0010 0.0010 0.0030 0.0010 0.0050 0.0010 0.0010 0.0050 0.0010 0.0010 0.0010 0.0010 < < < < < 0.0009 < < < < < < < < < < < < < < MW-3 3/22/2017 0.0010 0.0010 0.0010 0.0010 0.0010 4 J 0.0010 0.0010 0.0010 0.0010 0.0030 0.0010 0.0050 0.0010 0.0010 0.0050 0.0010 0.0010 0.0010 0.0010 MW-3 6/28/2019 NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA MW-4 12/7/2005 <0.005 <0.005 <0.005 NA NA <0.005 <0.005 <0.005 <0.005 <0.01 <0.005 <0.005 <0.050 <0.005 <0.010 <0.100 <0.005 <0.005 <0.005 <0.005 MW-4 6/9/2006 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.003 <0.001 <0.005 <0.001 <0.001 <0.025 <0.001 <0.001 <0.001 <0.001 MW-4 3/21/2008 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.005 <0.001 <0.001 <0.005 <0.001 <0.001 <0.001 <0.001 MW-4 7/24/2008 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.005 <0.001 <0.001 <0.005 <0.001 <0.001 <0.001 <0.001 MW-4 11/6/2008 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.005 <0.001 <0.001 <0.005 <0.001 <0.001 <0.001 <0.001 MW-4 1/27/2009 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.005 <0.001 <0.001 <0.005 <0.001 <0.001 <0.001 <0.001 MW-4 4/28/2009 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.005 <0.001 <0.001 <0.005 <0.001 <0.001 <0.001 <0.001 Page 15 of 38 Table 8: Analytical Data for Groundwater DSCA ID No.: DC920021 O O � O O O O V Z > I>C N N U I I I N I [mg/L] t7 MW-4 1/22/2010 < < < < < 0.0019 < < < < < < < < < < < < < < 0.0010 0.0010 0.0010 0.0010 0.0010 0.0010 0.0010 0.0010 0.0010 0.0010 0.0010 0.0050 0.0010 0.0010 0.0050 0.0010 0.0010 0.0010 0.0010 MW-4 12/13/2012 < < < < < < < < < < < < < < < < < < < < 0.0010 0.0010 0.0010 0.0010 0.0010 0.0010 0.0010 0.0010 0.0010 0.0010 0.0030 0.0010 0.0050 0.0010 0.0010 0.0050 0.0010 0.0010 0.0010 0.0010 MW-4 3/3/2016 < < < < < < < < < < < < < < < < < < < < 0.0010 10.0010 0.0010 0.0010 0.0010 0.0010 0.0010 0.0010 0.0010 0.0010 0.0030 0.0010 0.0050 0.0010 0.0010 0.0050 0.0010 0.0010 0.0010 0.0010 MW-4 3/22/2017 < < < < < < < < < < < < < < < < < < < < 0.0010 0.0010 0.0010 0.0010 0.0010 0.0010 0.0010 0.0010 0.0010 0.0010 0.0030 0.0010 0.0050 0.0010 0.0010 0.0050 0.0010 0.0010 0.0010 0.0010 MW-4 6/28/2019 NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA MW-5 12/7/2005 <0.005 1.87 <0.005 NA NA 1.53 <0.005 0.105 1.65 0.152 <0.005 <0.005 <0.050 <0.005 <0.010 <0.100 <0.005 <0.005 <0.005 <0.005 MW-5 6/9/2006 <0.125 2.12 <0.125 <0.125 <0.125 1.42 <0.125 <0.125 1.68 0.139 <.375 <0.125 <0.625 <0.125 <0.125 <3.130 <0.125 <0.125 <0.125 <0.125 MW-5 3/21/2008 <0.001 1.2 <0.001 <0.001 <0.001 0.045 <0.001 0.069 0.079 0.16 <0.001 <0.001 <0.005 <0.001 <0.001 <0.005 <0.001 <0.001 <0.001 <0.001 MW-5 4/14/2008 <0.020 0.94 <0.020 <0.020 <0.020 0.037 <0.020 0.052 0.05 0.093 <0.020 <0.020 <0.100 <0.020 <0.020 <0.100 <0.020 <0.020 <0.020 <0.020 0.0085 MW-5 7/24/2008 <0.010 0.43 <0.010 <0.010 <0.010 0.085 <0.010 0.094 0.032 <0.010 <0.010 <0.050 <0.010 <0.010 <0.050 <0.010 <0.010 <0.010 <0.010 MW-5 11/6/2008 <0.010 0.65 <0.010 <0.010 <0.010 0.05 <0.010 0.033 0.066 0.17 <0.010 <0.010 <0.050 <0.010 <0.010 <0.050 <0.010 <0.010 <0.010 <0.010 MW-5 1/27/2009 <0.010 0.73 <0.010 <0.010 <0.010 0.079 <0.010 0.031 0.092 0.12 <0.010 <0.010 <0.050 <0.010 <0.010 <0.050 <0.010 <0.010 <0.010 <0.010 MW-5 4/28/2009 <0.010 0.73 <0.010 <0.010 <0.010 0.24 <0.010 0.023 0.23 0.099 <0.010 <0.010 <0.050 <0.010 <0.010 <0.050 <0.010 <0.010 <0.010 <0.010 MW-5 1/22/2010 < 1.2 < < < 0.11 < 0.033 0.15 0.23 < < <0.025 < < <0.025 < < < < 0.0050 0.0050 0.0050 0.0050 0.0050 0.0050 0.0050 0.0050 0.0050 0.0050 0.0050 0.0050 0.0050 MW-5 12/12/2012 < 0.17 < < < 0.0031 < 0.0075 0.0081 0.055 < < < < < < < < < < 0.0010 0.0010 0.0010 0.0010 0.0010 0.0030 0.0010 0.0050 0.0010 0.0010 0.0050 0.0010 0.0010 0.0010 0.0010 MW-5 3/3/2016 < 0.56 < < < 0.18 < 0.015 0.2 0.28 < < < < < < < < 0.003 < 10.00101 0.0010 10.0010 10.0010 1 10.00101 0.0030 10.0010 10.0050 10.0010 10.0010 10.0050 10.0010 10.0010 1 0.0010 Page 16 of 38 Table 8: Analytical Data for Groundwater DSCA ID No.: DC920021 O O � O O O O V Z > I>C N N U I I I N I [mg/L] t7 < < < < < < < < < < < 0.0034 < < MW-5 3/22/2017 0.86 0.074 0.014 0.088 0.6 < 0.015 0.0050 0.0050 0.0050 0.0050 0.0050 0.0050 0.0250 0.0050 0.0050 0.0250 0.0050 J 0.0050 0.0050 MW-5 6/28/2019 NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA MW-6 6/9/2006 <0.125 1.17 <0.125 <0.125 <0.125 1.61 <0.125 <0.125 1.41 <0.125 <.375 <0.125 <0.625 <0.125 <0.125 <3.130 <0.125 <0.125 <0.125 <0.125 MW-6 3/21/2008 <0.001 0.072 <0.001 <0.001 <0.001 0.025 <0.001 <0.001 0.056 0.018 <0.001 <0.001 <0.005 <0.001 <0.001 <0.005 <0.001 <0.001 <0.001 <0.001 MW-6 4/14/2008 <0.010 0.36 <0.010 <0.010 <0.010 0.11 <0.010 <0.010 0.25 0.053 <0.010 <0.010 <0.050 <0.010 <0.010 <0.050 <0.010 <0.010 <0.010 <0.010 MW-6 7/24/2008 <0.005 0.34 <0.005 <0.005 <0.005 0.064 <0.005 <0.005 0.3 0.05 <0.005 <0.005 <0.025 <0.005 <0.005 <0.025 <0.005 <0.005 <0.005 <0.005 MW-6 11/6/2008 <0.005 0.66 <0.005 <0.005 <0.005 0.12 <0.005 0.004 J 0.47 0.082 <0.005 <0.005 <0.025 <0.005 <0.005 <0.025 <0.005 <0.005 <0.005 <0.005 MW-6 1/27/2009 <0.010 0.3 <0.010 <0.010 <0.010 0.05 <0.010 <0.010 0.14 0.034 <0.010 <0.010 <0.050 <0.010 <0.010 <0.050 <0.010 <0.010 <0.010 <0.010 0.0033 MW-6 4/29/2009 <0.005 0.56 <0.005 <0.005 <0.005 0.13 <0.005 0.42 0.056 <0.005 <0.005 <0.025 <0.005 <0.005 <0.025 <0.005 <0.005 <0.005 <0.005 < < 0.0008 < < < < < < < < < < < < < MW-6 1/22/2010 0.073 0.0052 0.0093 0.022 0.0010 0.0010 2 J 0.0010 0.0010 0.0010 0.0010 0.0010 0.0050 0.0010 0.0010 0.0050 0.0010 0.0010 0.0010 0.0010 MW-7 6/9/2006 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.003 <0.001 <0.005 <0.001 <0.001 <0.025 <0.001 <0.001 <0.001 <0.001 MW-7 3/21/2008 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.005 <0.001 <0.001 <0.005 <0.001 <0.001 <0.001 <0.001 MW-7 7/24/2008 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.005 <0.001 <0.001 <0.005 <0.001 <0.001 <0.001 <0.001 MW-7 11/6/2008 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.005 <0.001 <0.001 <0.005 <0.001 <0.001 <0.001 <0.001 MW-7 1/27/2009 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.005 <0.001 <0.001 <0.005 <0.001 <0.001 <0.001 <0.001 Page 17 of 38 Table 8: Analytical Data for Groundwater DSCA ID No.: DC920021 O O � O O O O V Z > I>C N N U I I I N I [mg/L] t7 MW-7 4/29/2009 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.005 <0.001 <0.001 <0.005 <0.001 <0.001 <0.001 <0.001 MW-7 1/22/2010 < < < < < < < < < < < < < < < < < < < < 0.0010 0.0010 0.0010 0.0010 0.0010 0.0010 0.0010 0.0010 0.0010 0.0010 0.0010 0.0010 0.0050 0.0010 0.0010 0.0050 0.0010 0.0010 0.0010 0.0010 MW-7 12/13/2012 < < < < < < < < < < < < < < < < < < < < 0.0010 0.0010 0.0010 0.0010 0.0010 0.0010 0.0010 10.0010 0.0010 0.0010 0.0030 0.0010 0.0050 0.0010 0.0010 0.0050 0.0010 0.0010 0.0010 10.0010 MW-7 3/3/2016 < < < < < < < < < 0.0019 < < < < < < < < < < 1 0.0010 0.0010 0.0010 0.0010 0.0010 0.0010 0.0010 0.0010 0.0010 0.0030 0.0010 0.0050 0.0010 0.0010 0.0050 0.0010 0.0010 0.0010 0.0010 MW-7 3/22/2017 < < < < < < < < < < < < < < < < < < < < 0.0010 0.0010 0.0010 0.0010 0.0010 0.0010 0.0010 0.0010 0.0010 0.0010 0.0030 0.0010 0.0050 0.0010 0.0010 0.0050 0.0010 0.0010 0.0010 0.0010 MW-8 6/9/2006 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 0.0024 <0.003 <0.001 <0.005 <0.001 <0.001 <0.025 <0.001 <0.001 <0.001 <0.001 MW-8 3/21/2008 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 0.0023 <0.001 <0.001 <0.005 <0.001 <0.001 <0.005 <0.001 <0.001 <0.001 <0.001 MW-8 7/24/2008 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.005 <0.001 <0.001 <0.005 <0.001 <0.001 <0.001 <0.001 MW-8 11/6/2008 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.005 <0.001 <0.001 <0.005 <0.001 <0.001 <0.001 <0.001 MW-8 1/27/2009 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 0.0014 <0.001 <0.001 <0.005 <0.001 <0.001 <0.005 <0.001 <0.001 <0.001 <0.001 MW-8 4/28/2009 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.005 <0.001 <0.001 <0.005 <0.001 <0.001 <0.001 <0.001 < < < < < < < < < 0.0009 < < < < < < < < < < MW-8 1/22/2010 0.0010 0.0010 0.0010 0.0010 0.0010 0.0010 0.0010 0.0010 0.0010 6 J 0.0010 0.0010 0.0050 0.0010 0.0010 0.0050 0.0010 0.0010 0.0010 0.0010 < < < < < < < < < 0.0006 < < < < < < < < < < MW-8 12/12/2012 1 0.0010 0.0010 0.0010 0.0010 0.0010 0.0010 0.0010 0.0010 0.0010 6 J 0.0030 0.0010 0.0050 0.0010 0.0010 0.0050 0.0010 0.0010 0.0010 0.0010 < 0.0004 < < < < < < < < < < < < < < < < MW-8 3/3/2016 0.0013 0.0065 0.0010 7 J 0.0010 0.0010 0.0010 0.0010 0.0010 0.0010 0.0030 10.0010 0.0050 0.0010 0.0010 10.0050 0.0010 10.0010 0.0010 0.0010 < 0.0009 < < < < < < < < < < < < < < < < MW-8 3/22/2017 0.0015 0.01 0.0010 2 J 0.0010 0.0010 0.0010 0.0010 0.0010 0.0010 0.0030 0.0010 0.0050 0.0010 0.0010 0.0050 0.0010 0.0010 0.0010 0.0010 MW-8 6/28/2019 NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA Page 18 of 38 Table 8: Analytical Data for Groundwater DSCA ID No.: DC920021 O O � O O O O V Z > I>C N N U I I I N I [mg/L] t7 MW-9 6/9/2006 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.003 <0.001 <0.005 <0.001 <0.001 <0.025 <0.001 <0.001 <0.001 <0.001 0.0005 MW-9 3/21/2008 <0.001 <0.001 <0.001 <0.001 0.0016 <0.001 <0.001 0.0018 <0.001 <0.001 <0.001 <0.005 <0.001 <0.001 <0.005 <0.001 <0.001 <0.001 <0.001 MW-9 7/24/2008 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.005 <0.001 <0.001 <0.005 <0.001 <0.001 <0.001 <0.001 MW-9 11/6/2008 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.005 <0.001 <0.001 <0.005 <0.001 <0.001 <0.001 <0.001 MW-9 1/27/2009 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.005 <0.001 <0.001 <0.005 <0.001 <0.001 <0.001 <0.001 MW-9 4/28/2009 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.005 <0.001 <0.001 <0.005 <0.001 <0.001 <0.001 <0.001 MW-9 1/22/2010 < < < < < < < < < < < < < < < < < < < < 0.0010 0.0010 0.0010 0.0010 0.0010 0.0010 0.0010 0.0010 0.0010 0.0010 0.0010 0.0010 0.0050 0.0010 0.0010 0.0050 0.0010 0.0010 0.0010 0.0010 MW-9 12/12/2012 < < < < < < < < < < < < < < < < < < < < 0.0010 0.0010 0.0010 0.0010 0.0010 0.0010 0.0010 0.0010 0.0010 0.0010 0.0030 0.0010 0.0050 0.0010 0.0010 0.0050 0.0010 0.0010 0.0010 0.0010 MW-9 3/3/2016 < < < < < < < < < < < < < < < < < < < < 0.0010 0.0010 0.0010 0.0010 0.0010 0.0010 0.0010 0.0010 0.0010 0.0010 0.0030 0.0010 0.0050 0.0010 0.0010 0.0050 0.0010 0.0010 0.0010 0.0010 MW-9 3/22/2017 < < < < < < < < < < < < < < < < < < < < 0.0010 0.0010 0.0010 0.0010 0.0010 0.0010 0.0010 0.0010 0.0010 0.0010 0.0030 0.0010 0.0050 0.0010 0.0010 0.0050 0.0010 0.0010 0.0010 0.0010 MW-9 6/28/2019 NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA MW-10 6/9/2006 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 0.0025 <0.003 <0.001 <0.005 <0.001 <0.001 <0.025 <0.001 <0.001 <0.001 <0.001 MW-10 3/21/2008 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 0.0016 <0.001 <0.001 <0.005 <0.001 <0.001 <0.005 <0.001 <0.001 <0.001 <0.001 MW-10 7/24/2008 <0.001 0.0012 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.005 <0.001 <0.001 <0.005 <0.001 <0.001 <0.001 <0.001 MW-10 11/6/2008 <0.001 0.0047 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 0.0034 <0.001 <0.001 <0.005 <0.001 <0.001 <0.005 <0.001 <0.001 <0.001 <0.001 Page 19 of 38 Table 8: Analytical Data for Groundwater DSCA ID No.: DC920021 O O � O O O O V Z > I>C N N U I I I N I [mg/L] t7 MW-10 1/27/2009 <0.001 0.0066 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 0.0042 <0.001 <0.001 <0.005 <0.001 <0.001 <0.005 <0.001 <0.001 <0.001 <0.001 MW-10 4/28/2009 <0.001 0.0052 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 0.0029 <0.001 <0.001 <0.005 <0.001 <0.001 <0.005 <0.001 <0.001 <0.001 <0.001 MW-10 1/22/2010 < 0.0084 < < < < < < < 0.0064 < < < < < < < < < < 0.00101 0.0010 0.0010 0.0010 0.0010 0.0010 0.0010 0.00101 0.0010 0.0010 0.0050 0.0010 0.0010 0.0050 0.0010 0.0010 0.0010 0.0010 < < < < < < < < < 0.0005 < < < < < < < < < < MW-10 3/3/2016 0.0010 0.0010 0.0010 0.0010 0.0010 0.0010 0.0010 0.0010 0.0010 0 J 0.0030 0.0010 0.0050 0.0010 0.0010 0.0050 0.0010 0.0010 0.0010 0.0010 MW-10 3/22/2017 < < < < < < < < < < < < < < < < < < < < 0.0010 0.0010 0.0010 0.0010 0.0010 0.0010 0.0010 0.0010 0.0010 0.0010 0.0030 0.0010 0.0050 0.0010 0.0010 0.0050 0.0010 0.0010 0.0010 0.0010 MW-10 6/28/2019 NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA MW-11 6/9/2006 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.003 <0.001 <0.005 <0.001 <0.001 <0.025 <0.001 <0.001 <0.001 <0.001 MW-11 3/21/2008 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.005 <0.001 <0.001 <0.005 <0.001 <0.001 <0.001 <0.001 MW-11 7/24/2008 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.005 <0.001 <0.001 <0.005 <0.001 <0.001 <0.001 <0.001 MW-11 11/6/2008 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.005 <0.001 <0.001 <0.005 <0.001 <0.001 <0.001 <0.001 MW-11 1/27/2009 <0.001 <0.001 <0.001 <0.001 <0.001 0.0011 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.005 <0.001 <0.001 <0.005 <0.001 <0.001 <0.001 <0.001 MW-11 4/28/2009 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.005 <0.001 <0.001 <0.005 <0.001 <0.001 <0.001 <0.001 MW-11 1/22/2010 < < < < < < < < < < < < < < < < < < < < 0.0010 0.0010 0.0010 0.0010 0.0010 0.0010 0.0010 0.0010 0.0010 0.0010 0.0010 0.0010 0.0050 0.0010 0.0010 0.0050 0.0010 0.0010 0.0010 0.0010 MW-11 6/28/2019 NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA MW-12 6/9/2006 <0.04 0.0572 <0.04 <0.04 <0.04 0.48 <0.04 <0.04 0.117 <0.04 <0.12 <0.04 <0.20 <0.04 <0.04 <1.0 <0.04 <0.04 <0.04 <0.04 Page 20 of 38 Table 8: Analytical Data for Groundwater DSCA ID No.: DC920021 O O � O O O O V Z > I>C N N U I I I N I [mg/L] t7 <0.050 <0.050 <0.050 <0.050 <0.050 <0.050 <0.050 <0.050 <0.050 <0.050 <0.050 <0.050 <0.050 <0.050 <0.050 MW-12 3/21/2008 0.25 5.2 0.95 <0.250 <0.250 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 MW-12 7/24/2008 <0.050 0.14 <0.050 <0.050 <0.050 3.2 <0.050 <0.050 0.47 <0.050 <0.050 <0.050 <0.25 <0.050 <0.050 <0.25 <0.050 <0.050 <0.050 <0.050 MW-12 11/6/2008 <0.020 0.1 <0.020 <0.020 <0.020 1.7 <0.020 <0.020 0.27 <0.020 <0.020 <0.020 <0.100 <0.020 <0.020 <0.100 <0.020 <0.020 <0.020 <0.020 MW-12 1/27/2009 <0.020 0.11 <0.020 <0.020 <0.020 1.7 <0.020 <0.020 0.24 <0.020 <0.020 <0.020 <0.100 <0.020 <0.020 <0.100 <0.020 <0.020 <0.020 <0.020 MW-12 4/29/2009 <0.020 0.14 <0.020 <0.020 <0.020 2.9 <0.020 <0.020 0.37 <0.020 <0.020 <0.020 <0.1 <0.020 <0.020 <0.1 <0.020 <0.020 <0.020 <0.020 MW-12 1/22/2010 <0.010 0.18 <0.010 <0.010 <0.010 3.1 <0.010 <0.010 0.42 <0.010 <0.010 <0.010 <0.050 <0.010 <0.010 <0.050 <0.010 <0.010 <0.010 <0.010 MW-12 12/12/2012 < 0.020 0.54 < 0.020 < 0.020 < 0.020 8.2 < 0.020 < 0.020 1.5 0.011 J < 0.060 < 0.020 < 0.10 < 0.020 < 0.020 < 0.10 < 0.020 < 0.020 < 0.020 < 0.020 MW-12 3/3/2016 < 0.2 < < < 1.8 < < 0.35 < < 0.015 < < < < < < < < < 0.0050 0.0050 0.0050 0.0050 0.0050 0.0050 0.0050 0.0050 0.0250 0.0050 0.0050 0.0250 0.0050 0.0050 0.0050 0.0050 < < < < < 0.0005 < < < < < < < < < < < MW-12 3/22/2017 0.16 0.28 0.1 0.0010 0.0010 0.0010 0.0010 0.0010 7 J 0.0010 0.0030 0.0010 0.0050 0.0010 0.0010 0.0050 0.0010 0.0010 0.0010 0.0010 MW-12 6/28/2019 NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA MW-13 1/12/2007 <0.04 <0.04 <0.04 <0.04 <0.04 0.885 <0.04 <0.04 0.04 <0.04 <0.12 <0.04 <0.20 <0.04 <0.04 <1.0 <0.04 <0.04 <0.04 <0.04 MW-13 3/21/2008 <0.001 0.03 <0.001 <0.001 <0.001 0.91 <0.001 <0.001 0.07 <0.001 <0.001 <0.001 <0.005 <0.001 <0.001 <0.005 <0.001 <0.001 <0.001 <0.001 MW-13 7/24/2008 <0.050 <0.050 <0.050 <0.050 <0.050 1.1 <0.050 <0.050 0.038 <0.050 <0.050 <0.050 <0.25 <0.050 <0.050 <0.25 <0.050 <0.050 <0.050 <0.050 MW-13 11/6/2008 <0.010 0.091 <0.010 <0.010 <0.010 0.66 <0.010 <0.010 0.037 <0.010 <0.010 <0.010 <0.050 <0.010 <0.010 <0.050 <0.010 <0.010 <0.010 <0.010 MW-13 1/27/2009 <0.010 0.083 <0.010 <0.010 <0.010 0.86 <0.010 <0.010 0.045 <0.010 <0.010 <0.010 <0.050 <0.010 <0.010 <0.050 <0.010 <0.010 <0.010 <0.010 Page 21 of 38 Table 8: Analytical Data for Groundwater DSCA ID No.: DC920021 O O � O O O O V Z > N N U I I I N I [mg/L] t7 MW-13 4/28/2009 <0.010 0.02 <0.010 <0.010 <0.010 0.91 <0.010 <0.010 0.046 <0.010 <0.010 <0.010 <0.050 <0.010 <0.010 <0.050 <0.010 <0.010 <0.010 <0.010 MW-13 1/22/2010 < 0.021 < < < 0.94 < < 0.052 < < < <0.025 < < <0.025 < < < < 0.0050 0.0050 0.0050 0.0050 0.0050 0.0050 0.0050 0.0050 0.0050 0.0050 0.0050 0.0050 0.0050 0.0050 0.0050 MW-13 12/12/2012 < 0.0093 < < < 0.53 < < 0.026 < < < < 0.010 < < < 0.010 < < < < 0.0020 0.0020 0.0020 0.0020 1 0.0020 0.0020 0.0020 0.0060 0.0020 0.0020 0.0020 0.0020 0.0020 0.0020 0.0020 MW-13 3/3/2016 < 0.007 < < < 0.31 < < 0.014 < < < < < < < < < < < 0.0010 0.0010 0.0010 0.0010 0.0010 0.0010 0.0010 0.0030 0.0010 0.0050 0.0010 0.0010 0.0050 0.0010 10.0010 0.0010 0.0010 MW-13 3/22/2017 < 0.02 < < < 0.35 < < 0.04 < < < < < < < < < < < 0.0010 0.0010 0.0010 0.0010 0.0010 0.0010 0.0010 0.0030 0.0010 0.0050 0.0010 0.0010 0.0050 0.0010 0.0010 0.0010 0.0010 MW-13 6/28/2019 NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA MW-14 1/10/2007 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.003 <0.001 <0.005 <0.001 <0.001 <0.025 <0.001 <0.001 <0.001 <0.001 0.0 3 MW-14 3/21/2008 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.005 <0.001 <0.001 <0.005 <0.001 <0.001 <0.001 <0.001 J MW-14 7/24/2008 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.005 <0.001 <0.001 <0.005 <0.001 <0.001 <0.001 <0.001 MW-14 11/6/2008 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.005 <0.001 <0.001 <0.005 <0.001 <0.001 <0.001 <0.001 MW-14 1/27/2009 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.005 <0.001 <0.001 <0.005 <0.001 <0.001 <0.001 <0.001 MW-14 4/28/2009 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.005 <0.001 <0.001 <0.005 <0.001 <0.001 <0.001 <0.001 MW-14 1/22/2010 < < < < < < < < < < < < < < < < < < < < 0.0010 0.0010 0.0010 0.0010 0.0010 0.0010 0.0010 0.0010 0.0010 0.0010 0.0010 0.0010 0.0050 0.0010 0.0010 0.0050 0.0010 0.0010 0.0010 0.0010 MW-14 3/3/2016 < < < < < < < < < < < < < < < < < < < < 0.0010 0.0010 0.0010 0.0010 0.0010 0.0010 0.0010 0.0010 0.0010 0.0010 0.0030 0.0010 0.0050 0.0010 0.0010 0.0050 0.0010 0.0010 0.0010 0.0010 Page 22 of 38 Table 8: Analytical Data for Groundwater DSCA ID No.: DC920021 O O � O O O O V Z > I>C N N U I I I N I [mg/L] t7 MW-14 3/22/2017 < < < < < < < < < < < < < < < < < < < < 0.0010 0.0010 0.0010 0.0010 0.0010 0.0010 0.0010 0.0010 0.0010 0.0010 0.0030 0.0010 0.0050 0.0010 0.0010 0.0050 0.0010 0.0010 0.0010 0.0010 MW-14 6/28/2019 NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA MW-15 3/21/2008 <0.050 2.3 <0.050 <0.050 <0.050 3 <0.050 <0.050 2.6 0.42 <0.050 <0.050 <0.25 <0.050 <0.050 <0.25 <0.050 <0.050 <0.050 <0.050 MW-15 4/14/2008 <0.050 1.5 <0.050 <0.050 <0.050 2.4 <0.050 0.032 J 1.5 0.23 <0.050 <0.050 <0.25 <0.050 0.058 <0.25 <0.050 <0.050 <0.050 <0.050 MW-15 7/24/2008 <0.010 0.81 <0.010 <0.010 <0.010 0.24 <0.010 <0.010 0.19 0.045 <0.010 <0.010 <0.050 <0.010 <0.010 0.040 J <0.010 <0.010 <0.010 <0.010 MW-15 11/6/2008 <0.010 0.32 <0.010 <0.010 <0.010 0.13 <0.010 0.012 0.2 0.33 <0.010 <0.010 <0.050 <0.010 <0.010 <0.050 <0.010 <0.010 <0.010 <0.010 MW-15 1/27/2009 <0.010 0.25 <0.010 <0.010 <0.010 0.076 <0.010 0.01 0.13 0.35 <0.010 <0.010 <0.050 <0.010 <0.010 <0.050 <0.010 <0.010 <0.010 <0.010 0.0028 0.0037 MW-15 4/29/2009 <0.005 0.045 <0.005 <0.005 <0.005 <0.005 0.006 0.23 <0.005 <0.005 <0.025 <0.005 <0.005 <0.025 <0.005 <0.005 <0.005 <0.005 < < 0.0004 < < < < < < < < < < < < < < MW-15 1/22/2010 0.0084 0.002 0.12 0.0010 0.0010 6 J 0.0010 0.0010 0.0010 0.0010 0.0010 0.0010 0.0050 0.0010 0.0010 0.0050 0.0010 0.0010 0.0010 0.0010 MW-16 1/22/2010 < < < < < < < < < < < < < < < < < < < < 0.0010 0.0010 0.0010 0.0010 0.0010 0.0010 0.0010 0.0010 0.0010 0.0010 0.0010 0.0010 0.0050 0.0010 0.0010 0.0050 0.0010 0.0010 0.0010 0.0010 MW-17 1/22/2010 < < < < < < < < < < < < < < < < < < < < 0.0010 0.0010 0.0010 0.0010 0.0010 0.0010 0.0010 0.0010 0.0010 0.0010 0.0010 0.0010 0.0050 0.0010 0.0010 0.0050 0.0010 0.0010 0.0010 0.0010 MW-17 12/12/2012 < < < < < < < < < < < < < < < < < < < < 0.0010 0.0010 0.0010 0.0010 0.0010 0.0010 0.0010 0.0010 0.0010 0.0010 0.0030 0.0010 0.0050 0.0010 0.0010 0.0050 0.0010 0.0010 0.0010 0.0010 Page 23 of 38 Table 8: Analytical Data for Groundwater DSCA ID No.: DC920021 O O � O O V Z > I>C N N U I I I N I [mg/L] t7 MW-17 6/28/2019 NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA DMW-18 1/27/2010 < 0.013 < < < 0.24 < < 0.022 < < < < < < < < < < < 0.0010 0.0010 0.0010 0.0010 0.0010 0.0010 0.0010 0.0010 0.0010 0.0050 0.0010 0.0010 0.0050 0.0010 0.0010 0.0010 0.0010 < < < < < 0.0007 < < < < < < < < < < < DMW-18 12/13/2012 0.046 0.76 0.099 0.0010 0.0010 0.0010 0.0010 0.0010 4 J 0.0010 0.0030 0.0010 0.0050 0.0010 0.0010 0.0050 0.0010 0.0010 0.0010 0.0010 < < < 0.0009 < < < < < < < 0.0004 TW-2 4/23/2013 2.1 0.001 0.051 0.066 0.62 0.12 0.005 0.0029 0.0010 0.0010 0.0010 2 J 0.0010 0.0050 0.0010 0.0010 0.0050 0.0010 0.0010 11 < < < < 0.0005 < < < < < < < 0.0009 < TW-3 4/23/2013 0.16 0.1 0.0074 0.0065 0.18 0.056 0.0010 0.0010 0.0010 0.0010 6 J 0.0010 0.0050 0.0010 0.0010 0.0050 0.0010 0.0010 0 J 0.0010 < < < < < < 0.0005 TW-4 4/23/2013 1.2 0.014 0.0011 200 0.014 12 0.002 0.038 0.0036 0.0021 0.042 0.011 0.007 0.0010 0.0010 0.0010 0.0050 0.0010 0.0050 5 J < < < < < 0.0008 < < < < < < < < < < < < < < HPP-1 1/20/2010 0.0010 0.0010 0.0010 0.0010 0.0010 3 J 0.0010 0.0010 0.0010 0.0010 0.0010 0.0010 0.0050 0.0010 0.0010 0.0050 0.0010 0.0010 0.0010 0.0010 HPP-2 1/20/2010 < < < < < < < < < < < < < < < < < < < < 0.0010 0.0010 0.0010 0.0010 0.0010 0.0010 0.0010 0.0010 0.0010 0.0010 0.0010 0.0010 0.0050 0.0010 0.0010 0.0050 0.0010 0.0010 0.0010 0.0010 HPP-3 1/20/2010 < 0.0028 < < < 0.0036 < < 0.0013 < < < < < < < < < < < 0.0010 0.0010 0.0010 0.0010 0.0010 0.0010 0.0010 0.0010 0.0010 0.0050 0.0010 0.0010 0.0050 0.0010 0.0010 0.0010 0.0010 HPP-4 1/20/2010 < < < < < < < < < < < < < < < < < < < < 0.0010 0.0010 0.0010 0.0010 0.0010 0.0010 0.0010 0.0010 0.0010 0.0010 0.0010 0.0010 0.0050 0.0010 0.0010 0.0050 0.0010 0.0010 0.0010 0.0010 < 0.0005 < < < < < 0.0004 < < < < < < < < < < < HPP-5 1/20/2010 0.0027 0.0010 6 J 0.0010 0.0010 0.0010 0.0010 0.0010 3 J 0.0010 0.0010 0.0010 0.0050 0.0010 0.0010 0.0050 0.0010 0.0010 0.0010 0.0010 HPP-6 1/20/2010 < 0.0067 < < < 0.18 < < 0.014 < < < < < < < < < < < 0.0010 0.0010 0.0010 0.0010 0.0010 0.0010 0.0010 0.0010 0.0010 0.0050 0.0010 0.0010 0.0050 0.0010 0.0010 0.0010 0.0010 Page 24 of 38 Tale e Analytical Data for Groundwater OSCAI No: DC9 0 21 \ \ k 4 \ § ) f A ° = ƒ z e e /I \ IkI u I± & [g/L] ± z no Table 8(1): Analytical Data for Groundwater (User Specified Chemicals) DSCA ID No.: DC920021 a � w � N 00 00 N 47 V] N A H a o a o � > a o 0 o 0 o � A J A o o Ste" N m - i= 7 2 U O a+ U cC I U I u I U O o 1mg/Ll t7 TMW-1 12/17/2002 <10 <10 <10 <10 <10 <10 NA <10 <50 <10 <10 <10 NA NA MW-1R 12/7/2005 <0.005 <0.005 <0.005 <0.005 <0.005 <0.005 <0.005 <0.005 <0.100 <0.005 <0.005 <0.005 NA NA MW-1R 6/9/2006 <0.125 <0.125 <0.125 <0.125 <0.125 <0.125 <0.125 <0.125 <3.130 <0.125 <0.125 <0.125 NA NA MW-1R 3/21/2008 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.005 <0.001 <0.001 <0.001 NA NA MW-1R 7/24/2008 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.500 <0.020 <0.020 <0.020 NA NA MW-1R 11/6/2008 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.100 <0.020 <0.020 <0.020 NA NA MW-1R 1/27/2009 <0.010 <0.010 <0.010 <0.010 <0.010 <0.010 <0.010 <0.010 <0.050 <0.010 <0.010 <0.010 NA NA MW-1R 4/29/2009 <0.010 <0.010 <0.010 <0.010 <0.010 <0.010 <0.010 <0.010 <0.050 <0.010 <0.010 <0.010 NA NA MW-1R 1/22/2010 < 0.010 < 0.010 < 0.010 < 0.010 < 0.010 < 0.010 < 0.010 < 0.010 < 0.050 < 0.0 10 < 0.010 < 0.010 NA NA MWAR 12/13/2012 < < < < < < < < < < < < NA NA 0.0010 0.0010 0.0010 0.0010 0.0010 0.0010 0.0010 0.0010 0.0050 0.0010 0.0010 0.0010 MW-1R 3/3/2016 < < < < < < < < < < < < NA 436 0.0010 0.0010 0.0010 0.0010 0.0010 0.0010 0.0010 0.0010 0.0050 0.0010 0.0010 0.0010 MW-1R 3/3/2016 <0.010 <0.010 <0.010 <0.010 <0.010 <0.010 <0.010 <0.010 <0.20 <0.010 <0.010 <0.010 NA 0.382 MW-1R 6/28/2019 NA NA NA NA NA NA NA NA NA NA NA NA 22.7 0.653 MW-2 11/18/2003 <0.8 <0.8 <0.8 <0.8 <0.8 <0.8 <0.8 <0.8 <4.0 <0.8 <0.8 <0.8 NA NA MW-2 5/2/2005 <2 <2 NA NA <2 NA NA NA NA NA NA <2 NA NA Pabc 26 of 38 Table 8(1): Analytical Data for Groundwater (User Specified Chemicals) DSCA ID No.: DC920021 a � w � N 00 00 N 47 V] N A H a o a o � > a o 0 o 0 o � A J A o o Ste" N m - i= 7 2 U O a+ U cC I U I u I U O o 1mg/Ll t7 MW-2 12/7/2005 <0.005 <0.005 <0.005 <0.005 <0.005 <0.005 <0.005 <0.005 <0.100 <0.005 <0.005 <0.005 NA NA MW-2 6/9/2006 <2 <2 <2 <2 <2 <2 <2 <2 <50 <2 <2 <2 NA NA MW-2 3/21/2008 <0.500 <0.500 <0.500 <0.500 <0.500 <0.500 <0.500 <0.500 <0.500 <0.500 <0.500 <0.500 NA NA MW-2 7/24/2008 <1.0 <1.0 <1.0 <1.0 <1.0 <1.0 <1.0 <1.0 <5.0 <1.0 <1.0 <1.0 NA NA MW-2 11/6/2008 <1.00 <1.00 <1.00 <1.00 <1.00 <1.00 <1.00 <1.00 <5.00 <1.00 <1.00 <1.00 NA NA MW-2 1/27/2009 <1.00 <1.00 <1.00 <1.00 <1.00 <1.00 <1.00 <1.00 <5.00 <1.00 <1.00 <1.00 NA NA MW-2 4/29/2009 <2.0 <2.0 <2.0 <2.0 <2.0 <2.0 <2.0 <2.0 <10 <2.0 <2.0 <2.0 NA NA MW-2 1/22/2010 < 1.0 < 1.0 < 1.0 < 1.0 < 1.0 < 1.0 < 1.0 < 1.0 < 5.0 < 1.0 < 1.0 < 1.0 NA NA MW-2 12/12/2012 < 2.0 < 2.0 < 2.0 < 2.0 < 2.0 < 2.0 < 2.0 < 2.0 < 10 < 2.0 < 2.0 < 2.0 NA NA MW-2 3/3/2016 < 0.10 < 0.10 < 0.10 < 0.10 < 0.10 < 0.10 < 0.10 < 0.10 < 0.50 0.13 0.8 < 0.10 NA 1,320 MW-2 6/28/2019 NA NA NA NA NA NA NA NA NA NA NA NA 105 521 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.005 <0.001 <0.001 <0.001 MW-3 11/18/2003 NA NA 0 0 0 0 0 0 0 0 0 0 0 0 MW-3 5/2/2005 <0.001 <0.001 NA NA <0.001 NA NA NA NA NA NA <0.001 NA NA MW-3 12/7/2005 <0.005 <0.005 <0.005 <0.005 <0.005 <0.005 <0.005 <0.005 <0.100 <0.005 <0.005 <0.005 NA NA MW-3 6/9/2006 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.005 <0.001 <0.001 <0.001 NA NA MW-3 3/21/2008 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.025 <0.001 <0.001 <0.001 NA NA Pabc 27 of 38 Table 8(1): Analytical Data for Groundwater (User Specified Chemicals) DSCA ID No.: DC920021 a � w � N 00 00 N 47 V] N A H o a > o w o 0 o � Ste" N m - i= 7 U O = S a+ r U cC U I u I U O o 1mg/Ll t7 MW-3 7/24/2008 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.005 <0.001 <0.001 <0.001 NA NA MW-3 11/6/2008 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.005 <0.001 <0.001 <0.001 NA NA MW-3 1/27/2009 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.005 <0.001 <0.001 <0.001 NA NA MW-3 4/29/2009 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.005 <0.001 <0.001 <0.001 NA NA MW-3 1/22/2010 < < < < < < < < < < < < NA NA 0.0010 0.0010 0.0010 0.0010 0.0010 0.0010 0.0010 0.0010 0.0050 0.0010 0.0010 0.0010 MW-3 12/13/2012 < < < < < < < < < < < < NA NA 0.0010 0.0010 0.0010 0.0010 0.0010 0.0010 0.0010 0.0010 0.0050 0.0010 0.0010 0.0010 MW-3 3/3/2016 < < < < < < < < < < < < NA NA 0.0010 0.0010 0.0010 0.0010 0.0010 0.0010 0.0010 0.0010 0.0050 0.0010 0.0010 0.0010 MW-3 3/3/2016 < < < < < < < < < 0.020 < < < NA 0.0534 0.0010 0.0010 0.0010 0.0010 0.0010 0.0010 0.0010 0.0010 0.0010 0.0010 0.0010 MW-3 6/28/2019 NA NA NA NA NA NA NA NA NA NA NA NA 2.66 0.0557 MW-4 12/7/2005 <0.005 <0.005 <0.005 <0.005 <0.005 <0.005 <0.005 <0.005 <0.100 <0.005 <0.005 <0.005 NA NA MW-4 6/9/2006 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.005 <0.001 <0.001 <0.001 NA NA MW-4 3/21/2008 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.005 <0.001 <0.001 <0.001 NA NA MW-4 7/24/2008 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.005 <0.001 <0.001 <0.001 NA NA MW-4 11/6/2008 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.005 <0.001 <0.001 <0.001 NA NA MW-4 1/27/2009 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.005 <0.001 <0.001 <0.001 NA NA MW-4 4/28/2009 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.005 <0.001 <0.001 <0.001 NA NA Page 28 of 38 Table 8(1): Analytical Data for Groundwater (User Specified Chemicals) DSCA ID No.: DC920021 a � w � N 00 00 N 47 V] N A H o a > o w o 0 o � Ste" N m - i= 7 U O = S a+ r U cC U I u I U O o 1mg/Ll t7 MW-4 1/22/2010 < < < < < < < < < < < < NA NA 0.0010 0.0010 0.0010 0.0010 0.0010 0.0010 0.0010 0.0010 0.0050 0.0010 0.0010 0.0010 MW-4 12/13/2012 < < < < < < < < < < < < NA NA 0.0010 0.0010 0.0010 0.0010 0.0010 0.0010 0.0010 0.0010 0.0050 0.0010 0.0010 0.0010 MW-4 3/3/2016 < < < < < < < < < < < < NA NA 0.0010 10.0010 0.0010 0.0010 0.0010 0.0010 0.0010 0.0010 0.0050 0.0010 0.0010 0.0010 MW-4 3/3/2016 < < < < < < < < < 0.020 < < < NA NA 0.0010 0.0010 0.0010 0.0010 0.0010 0.0010 0.0010 0.0010 0.0010 0.0010 0.0010 MW-4 6/28/2019 NA NA NA NA NA NA NA NA NA NA NA NA 58.4 0.964 MW-5 12/7/2005 <0.005 <0.005 <0.005 <0.005 <0.005 <0.005 <0.005 <0.005 <0.100 <0.005 <0.005 <0.005 NA NA MW-5 6/9/2006 <0.125 <0.125 <0.125 <0.125 <0.125 <0.125 <0.125 <0.125 <0.625 <0.125 <0.125 <0.125 NA NA MW-5 3/21/2008 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.005 <0.001 <0.001 <0.001 NA NA MW-5 4/14/2008 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.005 <0.020 <0.020 <0.020 NA NA MW-5 7/24/2008 <0.010 <0.010 <0.010 <0.010 <0.010 <0.010 <0.010 <0.010 <0.050 <0.010 <0.010 <0.010 NA NA MW-5 11/6/2008 <0.010 <0.010 <0.010 <0.010 <0.010 <0.010 <0.010 <0.010 <0.050 <0.010 <0.010 <0.010 NA NA MW-5 1/27/2009 <0.010 <0.010 <0.010 <0.010 <0.010 <0.010 <0.010 <0.010 <0.050 <0.010 <0.010 <0.010 NA NA MW-5 4/28/2009 <0.010 <0.010 <0.010 <0.010 <0.010 <0.010 <0.010 <0.010 <0.050 <0.010 <0.010 <0.010 NA NA MW-5 1/22/2010 < < < < < < < < < < < < NA NA 0.0050 10.0050 0.0050 10.0050 0.0050 10.0050 0.0050 10.0050 0.0250 10.0050 0.0050 10.0050 MW-5 12/12/2012 < < < < < < < < < < < < NA NA 0.0010 0.0010 0.0010 0.0010 0.0010 0.0010 0.0010 0.0010 0.0050 0.0010 0.0010 0.0010 0.0004 < < < < < < < < < < < MW-5 3/3/2016 NA 0.798 1 J 0.0010 0.0010 0.0010 0.0010 0.0010 0.0010 0.0010 0.0050 0.0010 0.0010 0.0010 Page 29 of 38 Table 8(1): Analytical Data for Groundwater (User Specified Chemicals) DSCA ID No.: DC920021 a � w � N 00 00 N 47 V] N A H a o a o � > a o 0 o 0 o � A J A o o Ste" N m - i= 7 2 U O a+ U cC I U I u I U O o 1mg/Ll t7 MW-5 3/22/2017 < 0.10 0.011 NA 0.907 0.0050 0.0050 0.0050 0.0050 0.0050 0.0050 0.0050 0.0050 0.0050 0.0050 MW-5 6/28/2019 NA NA NA NA NA NA NA NA NA NA NA NA 31 1.77 MW-6 6/9/2006 <0.125 <0.125 <0.125 <0.125 <0.125 <0.125 <0.125 <0.125 <0.625 <0.125 <0.125 <0.125 NA NA MW-6 3/21/2008 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.005 <0.001 <0.001 <0.001 NA NA MW-6 4/14/2008 <0.010 <0.010 <0.010 <0.010 <0.010 <0.010 <0.010 <0.010 <0.250 <0.010 <0.010 <0.010 NA NA MW-6 7/24/2008 <0.005 <0.005 <0.005 <0.005 <0.005 <0.005 <0.005 <0.005 <0.025 <0.005 <0.005 <0.005 NA NA MW-6 11/6/2008 <0.005 <0.005 <0.005 <0.005 <0.005 <0.005 <0.005 <0.005 <0.025 <0.005 <0.005 <0.005 NA NA MW-6 1/27/2009 <0.010 <0.010 <0.010 <0.010 <0.010 <0.010 <0.010 <0.010 <0.050 <0.010 <0.010 <0.010 NA NA MW-6 4/29/2009 <0.005 <0.005 <0.005 <0.005 <0.005 <0.005 <0.005 <0.005 <0.025 <0.005 <0.005 <0.005 NA NA MW-6 1/22/2010 < < < < < < < < < < < < NA NA 0.0010 0.0010 0.0010 0.0010 0.0010 0.0010 0.0010 0.0010 0.0050 0.0010 0.0010 0.0010 MW-7 6/9/2006 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.005 <0.001 <0.001 <0.001 NA NA MW-7 3/21/2008 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.005 <0.001 <0.001 <0.001 NA NA MW-7 7/24/2008 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.005 <0.001 <0.001 <0.001 NA NA MW-7 11/6/2008 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.005 <0.001 <0.001 <0.001 NA NA MW-7 1/27/2009 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.005 <0.001 <0.001 <0.001 NA NA Pabc 30 of 38 Table 8(1): Analytical Data for Groundwater (User Specified Chemicals) DSCA ID No.: DC920021 a � w � N 00 00 N 47 V] N A H a. o a o � > a. o 0 0 o � A J A o o Ste" N m - i= 7 2 U O = S a+ r U cC U I u I U O o 1mg/Ll t7 MW-7 4/29/2009 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.005 <0.001 <0.001 <0.001 NA NA MW-7 1/22/2010 < < < < < < < < < < < < NA NA 0.0010 0.0010 0.0010 0.0010 0.0010 0.0010 0.0010 0.0010 0.0050 0.0010 0.0010 0.0010 MW-7 12/13/2012 < < < < < < < < < < < < NA NA 0.0010 0.0010 0.0010 0.0010 0.0010 0.0010 0.0010 0.0010 0.0050 0.0010 0.0010 0.0010 MW-7 3/3/2016 < < < < < < < < < < < < NA NA 0.0010 10.0010 0.0010 10.0010 0.0010 10.0010 0.0010 10.0010 0.0050 10.0010 0.0010 10.0010 MW-7 3/22/2017 < < < < < < < < < 0.020 < < < NA NA 0.0010 0.0010 0.0010 0.0010 0.0010 0.0010 0.0010 0.0010 0.0010 0.0010 0.0010 MW-8 6/9/2006 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.005 <0.001 <0.001 <0.001 NA NA MW-8 3/21/2008 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.005 <0.001 <0.001 <0.001 NA NA MW-8 7/24/2008 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.005 <0.001 <0.001 <0.001 NA NA MW-8 11/6/2008 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.005 <0.001 <0.001 <0.001 NA NA MW-8 1/27/2009 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.005 <0.001 <0.001 <0.001 NA NA MW-8 4/28/2009 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.005 <0.001 <0.001 <0.001 NA NA MW-8 1/22/2010 < < < < < < < < < < < < NA NA 0.0010 0.0010 0.0010 0.0010 0.0010 0.0010 0.0010 0.0010 0.0050 0.0010 0.0010 0.0010 MW-8 12/12/2012 < < < < < < < < < < < < NA NA 0.0010 0.0010 0.0010 0.0010 0.0010 0.0010 0.0010 0.0010 0.0050 0.0010 0.0010 0.0010 MW-8 3/3/2016 < < < < < < < < < < < < NA NA 0.0010 10.0010 0.0010 10.0010 0.0010 10.0010 0.0010 10.0010 0.0050 10.0010 0.0010 10.0010 MW-8 3/22/2017 < < < < < < < < < 0.020 < < < NA NA 0.0010 0.0010 0.0010 0.0010 0.0010 0.0010 0.0010 0.0010 0.0010 0.0010 0.0010 MW-8 6/28/2019 NA NA NA NA NA NA NA NA NA NA NA NA 1.09 0.299 Pabc 31 of 38 Table 8(1): Analytical Data for Groundwater (User Specified Chemicals) DSCA ID No.: DC920021 a � w � N 00 00 N 47 V] N A H a o a o � > a o 0 o 0 o � A J A o o Ste" N m - i= 7 2 U O a+ U cC I U I u I U O o 1mg/Ll t7 MW-9 6/9/2006 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.005 <0.001 <0.001 <0.001 NA NA MW-9 3/21/2008 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.005 <0.001 <0.001 <0.001 NA NA MW-9 7/24/2008 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.005 <0.001 <0.001 <0.001 NA NA MW-9 11/6/2008 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.005 <0.001 <0.001 <0.001 NA NA MW-9 1/27/2009 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.005 <0.001 <0.001 <0.001 NA NA MW-9 4/28/2009 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.005 <0.001 <0.001 <0.001 NA NA MW-9 1/22/2010 < < < < < < < < < < < < NA NA 0.0010 0.0010 0.0010 0.0010 0.0010 0.0010 0.0010 0.0010 0.0050 10.0010 0.0010 0.0010 MW-9 12/12/2012 < < < < < < < < < < < < NA NA 0.0010 0.0010 0.0010 0.0010 0.0010 0.0010 0.0010 0.0010 0.0050 0.0010 0.0010 0.0010 MW-9 3/3/2016 < < < < < < < < < < < < NA NA 0.0010 0.0010 0.0010 0.0010 0.0010 0.0010 0.0010 0.0010 0.0050 0.0010 0.0010 0.0010 MW-9 3/22/2017 < < < < < < < < < 0.020 < < < NA NA 0.0010 0.0010 0.0010 10.0010 0.0010 10.0010 0.0010 10.0010 0.0010 0.0010 0.0010 MW-9 6/28/2019 NA NA NA NA NA NA NA NA NA NA NA NA 52.6 2.04 MW-10 6/9/2006 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.005 <0.001 <0.001 <0.001 NA NA MW-10 3/21/2008 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.005 <0.001 <0.001 <0.001 NA NA MW-10 7/24/2008 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.005 <0.001 <0.001 <0.001 NA NA MW-10 11/6/2008 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.005 <0.001 <0.001 <0.001 NA NA Pabc 32 of 38 Table 8(1): Analytical Data for Groundwater (User Specified Chemicals) DSCA ID No.: DC920021 a � w � N 00 00 N 47 V] N A H a. o a o � > a. o 0 0 o � A J A o o Ste" N m - i= 7 2 U O a+ U cC I U I u I U O o 1mg/Ll t7 MW-10 1/27/2009 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.005 <0.001 <0.001 <0.001 NA NA MW-10 4/28/2009 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.005 <0.001 <0.001 <0.001 NA NA MW-10 1/22/2010 < < < < < < < < < < < < NA NA 0.0010 0.0010 0.0010 0.0010 0.0010 0.0010 0.0010 0.0010 0.0050 0.0010 0.0010 0.0010 MW-10 3/3/2016 < < < < < < < < < < < < NA NA 0.0010 10.0010 0.0010 10.0010 0.0010 10.0010 0.0010 10.0010 0.0050 10.0010 0.0010 10.0010 MW-10 3/22/2017 < < < < < < < < < 0.020 < < < NA NA 0.0010 0.0010 0.0010 0.0010 0.0010 0.0010 0.0010 0.0010 0.0010 0.0010 0.0010 MW-10 6/8/2019 NA NA NA NA NA NA NA NA NA NA NA NA 0.562 0.0184 MW-11 6/9/2006 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.005 <0.001 <0.001 <0.001 NA NA MW-11 3/21/2008 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.005 <0.001 <0.001 <0.001 NA NA MW-11 7/24/2008 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.005 <0.001 <0.001 <0.001 NA NA MW-11 11/6/2008 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.005 <0.001 <0.001 <0.001 NA NA MW-11 1/27/2009 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.005 <0.001 <0.001 <0.001 NA NA MW-11 4/28/2009 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.005 <0.001 <0.001 <0.001 NA NA MW-11 1/22/2010 < < < < < < < < < < < < NA NA 0.0010 0.0010 0.0010 0.0010 0.0010 0.0010 0.0010 0.0010 0.0050 0.0010 0.0010 0.0010 MW-11 6/28/2019 NA NA NA NA NA NA NA NA NA NA NA NA 2.12 0.145 MW-12 6/9/2006 <0.04 <0.04 <0.04 <0.04 <0.04 <0.04 <0.04 <0.04 <0.20 <0.04 <0.04 <0.04 NA NA Pabc 33 of 38 Table 8(1): Analytical Data for Groundwater (User Specified Chemicals) DSCA ID No.: DC920021 a � w � N 00 00 N 47 V] N A H a o a o � > a o 0 0 o o � A J A o o Ste" N m - i= 7 ,2 U I U I u I U O o 1mg/Ll t7 <0.050 <0.050 <0.050 <0.050 <0.050 <0.050 <0.050 <0.050 <0.250 <0.050 <0.050 <0.050 MW-12 3/21/2008 NA NA 0 0 0 0 0 0 0 0 0 0 0 0 MW-12 7/24/2008 <0.050 <0.050 <0.050 <0.050 <0.050 <0.050 <0.050 <0.050 <0.250 <0.050 <0.050 <0.050 NA NA MW-12 11/6/2008 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.100 <0.020 <0.020 <0.020 NA NA MW-12 1/27/2009 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.100 <0.020 <0.020 <0.020 NA NA MW-12 4/29/2009 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.020 <0.100 <0.020 <0.020 <0.020 NA NA MW-12 1/22/2010 < 0.010 < 0.010 < 0.010 < 0.010 < 0.010 < 0.010 < 0.010 < 0.010 < 0.050 < 0.010 < 0.010 < 0.010 NA NA MW-12 12/12/2012 < 0.020 < 0.020 < 0.020 < 0.020 < 0.020 < 0.020 < 0.020 < 0.020 < 0.10 < 0.020 < 0.020 < 0.020 NA NA MW-12 3/3/2016 < < < < < < < < < < < < NA NA 0.0050 0.0050 0.0050 0.0050 0.0050 0.0050 0.0050 0.0050 0.0250 0.0050 0.0050 0.0050 < < < < < < < < < 0.0006 < MW-12 3/22/2017 < 0.020 NA NA 0.0010 0.0010 0.0010 0.0010 0.0010 0.0010 0.0010 0.0010 0.0010 11 0.0010 MW-12 6/28/2019 NA NA NA NA NA NA NA NA NA NA NA NA 0.105 0.0127 MW-13 1/12/2007 <0.04 <0.04 <0.04 <0.04 <0.04 <0.04 <0.04 <0.04 <0.20 <0.04 <0.04 <0.04 NA NA MW-13 3/21/2008 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.005 <0.001 <0.001 <0.001 NA NA MW-13 7/24/2008 <0.050 <0.050 <0.050 <0.050 <0.050 <0.050 <0.050 <0.050 <0.250 <0.050 <0.050 <0.050 NA NA MW-13 11/6/2008 <0.010 <0.010 <0.010 <0.010 <0.010 <0.010 <0.010 <0.010 <0.050 <0.010 <0.010 <0.010 NA NA MW-13 1/27/2009 <0.010 <0.010 <0.010 <0.010 <0.010 <0.010 <0.010 <0.010 <0.050 <0.010 <0.010 <0.010 NA NA Pabc 34 of 38 Table 8(1): Analytical Data for Groundwater (User Specified Chemicals) DSCA ID No.: DC920021 a � w � N 00 00 N 47 V] N A H o a > o w o 0 o � Ste" N m - i= 7 U O a+ U cC I U I u I U O o 1mg/Ll t7 MW-13 4/28/2009 <0.010 <0.010 <0.010 <0.010 <0.010 <0.010 <0.010 <0.010 <0.050 <0.010 <0.010 <0.010 NA NA MW-13 1/22/2010 < < < < < < < < < < < < NA NA 0.0050 0.0050 0.0050 0.0050 0.0050 0.0050 0.0050 0.0050 0.0250 0.0050 0.0050 0.0050 MW-13 12/12/2012 < < < < < < < < < 0.010 < < < NA NA 0.0020 0.0020 0.0020 0.0020 0.0020 0.0020 0.0020 0.0020 0.0020 0.0020 0.0020 MW-13 3/3/2016 < < < < < < < < < < < < NA NA 0.0010 0.0010 0.0010 0.0010 0.0010 0.0010 0.0010 0.0010 0.0050 0.0010 0.0010 0.0010 < < < < < < < < < 0.0009 < MW-13 3/22/2017 < 0.020 NA NA 0.0010 0.0010 0.0010 0.0010 0.0010 0.0010 0.0010 0.0010 0.0010 3 J 0.0010 MW-13 6/28/2019 NA NA NA NA NA NA NA NA NA NA NA NA 10.8 0.249 MW-14 1/10/2007 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.005 <0.001 <0.001 <0.001 NA NA MW-14 3/21/2008 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.005 <0.001 <0.001 <0.001 NA NA MW-14 7/24/2008 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.005 <0.001 <0.001 <0.001 NA NA MW-14 11/6/2008 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.005 <0.001 <0.001 <0.001 NA NA MW-14 1/27/2009 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.005 <0.001 <0.001 <0.001 NA NA MW-14 4/28/2009 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.005 <0.001 <0.001 <0.001 NA NA MW-14 1/22/2010 < < < < < < < < < < < < NA NA 0.0010 0.0010 0.0010 0.0010 0.0010 0.0010 0.0010 0.0010 0.0050 0.0010 0.0010 0.0010 MW-14 3/3/2016 < < < < < < < < < < < < < NA NA 0.0010 0.0010 0.0010 0.0010 0.0010 0.0010 0.0010 0.0010 0.0050 0.0010 0.0010 0. Page 35 of 38 Table 8(1): Analytical Data for Groundwater (User Specified Chemicals) DSCA ID No.: DC920021 a � w � N 00 00 N 47 V] N A H o a > o w o 0 o � Ste" N m - i= 7 U O a+ U cC I U I u I U O o 1mg/Ll t7 MW-14 3/22/2017 < < < < < < < < < 0.020 < < < NA NA 0.0010 0.0010 0.0010 0.0010 0.0010 0.0010 0.0010 0.0010 0.0010 0. 00 10 0.0010 MW-14 6/28/2019 NA NA NA NA NA NA NA NA NA NA 0.64 NA 4.55 0.64 MW-15 3/21/2008 <0.050 <0.050 <0.050 <0.050 <0.050 <0.050 <0.050 <0.050 <0.250 <0.050 <0.050 <0.050 NA NA MW-15 4/14/2008 <0.050 <0.050 <0.050 <0.050 <0.050 <0.050 <0.050 <0.050 <2.50 <0.050 <0.050 <0.050 NA NA MW-15 7/24/2008 <0.010 <0.010 <0.010 <0.010 <0.010 <0.010 <0.010 <0.010 <0.050 <0.010 <0.010 <0.010 NA NA MW-15 11/6/2008 <0.010 <0.010 <0.010 <0.010 <0.010 <0.010 <0.010 <0.010 <0.050 <0.010 <0.010 <0.010 NA NA MW-15 1/27/2009 <0.010 <0.010 <0.010 <0.010 <0.010 <0.010 <0.010 <0.010 <0.050 <0.010 <0.010 <0.010 NA NA MW-15 4/29/2009 <0.005 <0.005 <0.005 <0.005 <0.005 <0.005 <0.005 <0.005 <0.025 <0.005 <0.005 <0.005 NA NA MW-15 1/22/2010 < < < < < < < < < < < < NA NA 0.0010 0.0010 0.0010 0.0010 0.0010 0.0010 0.0010 0.0010 0.0050 0.0010 0.0010 0.0010 MW-16 1/22/2010 < < < < < < < < < < < < NA NA 0.0010 0.0010 0.0010 0.0010 0.0010 0.0010 0.0010 0.0010 0.0050 0.0010 0.0010 0.0010 MW-17 1/22/2010 < < < < < < < < < < < < NA NA 0.0010 0.0010 0.0010 0.0010 0.0010 0.0010 0.0010 0.0010 0.0050 0.0010 0.0010 0.0010 MW-17 12/12/2012 < < < < < < < < < < < < NA NA 0.0010 0.0010 0.0010 0.0010 0.0010 0.0010 0.0010 0.0010 0.0050 0.0010 0.0010 0.0010 Page 36 of 38 Table 8(1): Analytical Data for Groundwater (User Specified Chemicals) DSCA ID No.: DC920021 a � w � N 00 00 N 47 V] N A H o a > o w o 0 o � Ste" N m - i= 7 U O a+ U cC I U I u I U O o 1mg/Ll t7 MW-17 6/28/2019 NA NA NA NA NA NA NA NA NA NA NA NA 9.51 0.279 DMW-18 1/27/2010 < < < < < < < < < < < < NA NA 0.0010 0.0010 0.0010 0.0010 0.0010 0.0010 0.0010 0.0010 0.0050 0.0010 0.0010 0.0010 DMW-18 12/13/2012 < < < < < < < < < < < < NA NA 0.0010 0.0010 0.0010 0.0010 0.0010 0.0010 0.0010 0.0010 0.0050 0.0010 0.0010 0.0010 < < < 0.0004 < < < < < < < < TW-2 4/23/2013 NA NA 0.0010 0.0010 0.0010 7 J 0.0010 0.0010 0.0010 0.0010 0.0050 0.0010 0.0010 0.0010 TW-3 4/23/2013 < < < < < < < < < < < < NA NA 0.0010 0.0010 0.0010 0.0010 0.0010 0.0010 0.0010 0.0010 0.0050 0.0010 0.0010 0.0010 0.0006 0.0009 0.0004 < < < < TW-4 4/23/2013 0.0036 0.003 0.0021 0.0018 0.0011 NA NA 2 J 61 6 J 0.0050 0.0010 0.0010 0.0010 HPP-1 1/20/2010 < < < < < < < < < < < < NA NA 0.0010 0.0010 0.0010 0.0010 0.0010 0.0010 0.0010 0.0010 0.0050 0.0010 0.0010 0.0010 HPP-2 1/20/2010 < < < < < < < < < < < < NA NA 0.0010 0.0010 0.0010 0.0010 0.0010 0.0010 0.0010 0.0010 0.0050 0.0010 0.0010 0.0010 HPP-3 1/20/2010 < < < < < < < < < < < < NA NA 0.0010 0.0010 0.0010 0.0010 0.0010 0.0010 0.0010 0.0010 0.0050 0.0010 0.0010 0.0010 HPP-4 1/20/2010 < < < < < < < < < < < < NA NA 0.0010 0.0010 0.0010 0.0010 0.0010 0.0010 0.0010 0.0010 0.0050 0.0010 0.0010 0.0010 HPP-5 1/20/2010 < < < < < < < < < < < < NA NA 0.0010 0.0010 0.0010 0.0010 0.0010 0.0010 0.0010 0.0010 0.0050 0.0010 0.0010 0.0010 HPP-6 1/20/2010 < < < < < < < < < < < < NA NA 0.0010 0.0010 0.0010 0.0010 0.0010 0.0010 0.0010 0.0010 0.0050 0.0010 0.0010 0.0010 Page 37 of 38 Table Rg:Analyfcal Data for Groundwater (User Specified Chemicals) ■ OSCAI No.: Or9021 \ & ( ƒ g ƒ 0 \ ( @ § ) z 0 ( 0 § / 2 % \ \ j / \ 2 2 Lg/L] / ) ATTACHMENT 4 MONITORING WELL LOCATION MAP LEGEND tax Monitoring Well Location l9 Intemediate/Deep Monitoring Well Location Well Destroyed by Site Activities F�r --- Surface Water Feature lot r �r M -. or ,r MW / -13 K..� MWe150 MW-8 ^, MW-6 RS. • s, MW-17� x6 NIN' 7 M14'-10 MW-1 R DMN'-I S& �- fO�f1P MW-2 F' MW-3 �. A1♦P�. r �� MW-It MW 6� i �etlip r d� 4� V N � � 0 0 0 0 a a a 0 120 E . APPROX. SCALE, I1. sa ATT. 4 ATTACHMENT 6 GROUNDWATER CONTOUR MAP LEGEND Monitoring Well Location, Identification MW-1 and Relative Groundwater Elevation (ft) 188.77 • Intermediate Monitoring Well Location, DMW-1 Identification and Relative Groundwater 189.43 Elevation (ft) • Monitoring Well Location and Identification (missing) (202.21) Groundwater elevation not used in contouring - Potentiometric Surface Contour (ft/msl) Inferred Groundwater Flow Direction Surface Water Feature '♦ r � I •, `� �q` fir'- '1 �_ ; rOIN � 'Q l y S !Y-.fir' X j yNUH a #+ F -` ' f • '�.{ 5} k ry *'{ ' +••, Nei ,�•,�--� f .•; *'',, ..�r +�. 1 .fit t ; { , �Ilt Ik- kr 4 + 4 I P" , r 9"' f 3t' o . M1f � MW- / .f. 2 C W W~ N of 13 1 { 1 �}T' {x ' Ti =e5Oao 189.43. w.Y t* '' o�o�� y� 4 • •s. u o ¢ iZ 1VIW MW�15 MW 8 ti �+ 4 a z LL ' � ' �; � � , 1 �`• tax- � 189.34 h 189.31 di1, MW-6 �,, �` .4 I \ J , . oe r, -1ofbI 'ed Grouts ater ... Flow Direion-•' 1Y M1 - . pp I MW-7 t li l !i 190.8 90.LLI { }t MW-11 193TA MW 6 - 7t a[ 94.79 Y od y 19_ S r k W cFi �o +' { t'•- �h �_ 4 . 4 i p'r SHEET: ._ } ' + ' ."I-�%*,�,s { { t,' �Y r1► ► ' APPROX. SCALE, ft. ATT. 6 ATTACHMENT 7 GROUNDWATER CONCENTRATION MAP r MW-5 (3/22/17) 5 ' . * i LEGEND C� PCE - 74 ug/1 MW-14 (3/22/17 MW-13 (3/22/17) MW-9 (3/22/17) t "� 1 MW-12 (3/22/17) MW-7 (3/22/17 MW-8 (3/22/17� Monitoring Well Location v� t-. TCE - 88 u 1 1 ® g -� BDL PCE - 350 ug/1 PCE - 280 u /1 BDL rCd cis-1,2-DCE - 860 ug/1 TCE - 40 u /1 g BDL PCE - LS ug/1 ,� > N g TCE - 100 u /1 Intermediate/Dee Monitoring Well O trans-,2-DCE - 14 u /I � MW-14 (6/28/191 g cis-1,2-DCE - 0.92 J ug/1 MW-9 (6/28/19) p g 1 g cis-1,2-DCE - 20 ug/1 cis-1,2-DCE - 160 ug/1 VC - 10 ug/I Iron - 52,600 u 1 Location VC - 600 ug/1 Iron - 4,550 ug/1 Chloroform - 0.93 J u /1 � N 1° g trans- - 0.57 J ug/1 Manganese - 2,040 a /I " 1 OVO1 1,1-DCE - 3.4 J ug/1 Manganese - 640 ug/1 MW-8 (6/28/191 g Well Destroyed b Site Activities MW-13 (6/28/19) Chloroform - 0.61 J ug/I Y Y O .=ZU Chloroethane - 11 ug/1 Iron - 1,090 ug/1 r Manganese - 907 u /1 Iron - 10,800 ug/1 MW-12 (6/28/19) BDL Below Laborato Detection Limits N g g * } Manganese - 299 ug/1 r1 � 6'.C' Manganese - 249 ug/1 Iron - 105 ug/1 $. MW-5 (6/28/19)` J Estimated Value GNU[.• G� Manganese - 12.7 ug/1 ay. , N Iron - 31,000 ug/1 ug/1 micrograms per liter $.., �� C/1 Manganese - 1,770 ug/1 / — Potentiometric Surface Contour (ft) U�� 7 — Inferred Groundwater Flow Direction 'd N / 4 Q MW-15 (1/22/10) !' _ — Surface Water Feature N + - cis-1,2-DCE - 8.4 ug/1 .. ; O 0 trans- l,0 ug/1 2-DCE - 2 ug/1 + C - 12+ - I Area of 2L Standard Exceedance V MTBE - 0.46 J ug/1 ,. %+ _ t Red highlighted text indicates concentrations . above 2L Standards. t / ' MW-17 (12/12/12) MW-6 (1/22/101 1j }w BDL �k PCE - Tetrachloroethene o PCE - 5.2 ug/1 A. , TCE Trichloroethene > ~ TCE - 9.3 ug/1 , MW-17 (6/28/19) cis-1,2-DCE - cis-1,2-Dichloroethene w z d cis-1,2-DCE - 73 ug/1 / Iron - 9,510 ug/l trans-1,2-DCE - trans-1,2-Dichloroethene z N m o VC - 22 ug/I / , ` Manganese - 279 ug/1 VC - Vinyl Chloride z zi 3 Z 4 0 MTBE - 0.82 J ug/1 1,1-DCE - 1, 1 -Dichloroethene w a � w + ' MTBE -Methyl tert-butyl ether ; o 0 o MW-4 (3/22/171 - �� a z LL BDL y MW-4 (6/28/19) di 1 Iron - 58,400 ug/1 Manganese - 964 ug/1 DMW-18 (12/13/12) •- r' PCE - 760 ug/1 TCE - 99 ug/1 cis-1,2-DCE - 46 ug/1 trans-1,2-DCE - 0.74 J ug/I j F. \ N F MW-10 (3/22/17)� BDL x MW-10 (6/28/19) f"� +y Iron - 562 ug/1 f Manganese - 18.4 ug/1 / i rep f _ i •. � i �I r a MW-1R (3/22/17) PCE - 670 ug/1 TCE - 780 ug/1 r A cis-1,2-DCE - 3100 ug/1� trans-1,2-DCE - 7.7 ug/1 J VC - 130 ug/1 L DCE-6.7Jug1 -r' , Manganese - 382 ug/1 MW-1R(6/28/19) " — MW-2(3/3/16) rn rn Iron - 22,700 ug/1 P 63 J u /1 tt �" ti r` CD 0 Manganese - 653 ug/1 g r o 0 Carbon te3iaehloride - 130 ug/1 MW-3 (3/22/17) Chloroform - 800 ug/1 "1. N rn rn � � - MW-11 (1/22/10) \ MW-16 (1/22/10) BDL PCE - 0.94 J ug/1 Acetone - 6,600 ug/1 Manganese - 53.4 ug/I Manganese - 11320,000 ug/1 BDL A . ? 4 MW-11 (6/28/19) — o •' MW-3 6/28/19 MW-2 (6/28/19) ' x Iron - 2,120 ug/1 ( 1 _ Q 120 = Iron - 2,660 ug/1 Iron - 105,000 ug/1 • Manganese - 145 ug/1 Manganese - 55.7 ug/1 Manganese - 521,000 ug/1 '1N ► I APPROX. SCALE, ft. ATT. 7 ATTACHMENT 15 ANALYTICAL DATA 2�SENCO Laboratories 9g Accurate. Timely. Respousive. luuavative. 102-A Woodwinds Industrial Court Cary NC, 27511 Phone: 919.467.3090 FAX: 919.467.3515 Tuesday, July 2, 2019 URS - Charlotte (UR004) Attn: Carlin Slusher 1600 Perimeter Park Dr S-400 Morrisville, NC 27560 RE: Laboratory Results for Project Number: 92-0021 T&J Cleaners/, Project Name/Desc: DSCA ENCO Workorder(s): CC10460 Dear Carlin Slusher, Enclosed is a copy of your laboratory report for test samples received by our laboratory on Friday, June 28, 2019. Unless otherwise noted in an attached project narrative, all samples were received in acceptable condition and processed in accordance with the referenced methods/procedures. Results for these procedures apply only to the samples as submitted. The analytical results contained in this report are in compliance with NELAC standards, except as noted in the project narrative if applicable. This report shall not be reproduced except in full, without the written approval of the Laboratory. This report contains only those analyses performed by Environmental Conservation Laboratories. Unless otherwise noted, all analyses were performed at ENCO Cary. Data from outside organizations will be reported under separate cover. If you have any questions or require further information, please do not hesitate to contact me. Sincerely, Stephanie Franz Project Manager Enclosure(s) FINAL This report relates only to the sample as received by the laboratory, and may only be reproduced in full. I Page 1 of 13 PROJECT NARRATIVE Date: 02 July 2019 Client: URS - Charlotte (UR004) Project: DSCA Lab ID: CC10460 Overview (� �Eo www.encolabs.com Environmental Conservation Laboratories, Inc. (ENCO) analyzed all submitted samples in accordance with the methods referenced in the laboratory report. Any particular difficulties encountered during sample handling by ENCO are discussed in the QC Remarks section below. Quality Control Samples No Comments Quality Control Remarks No Comments Other Comments It was noted and agreed that as a matter of policy, ENCO controls QC batches based upon the recoveries of our standard/routine shortlist of reported QC analytes, regardless of the reporting list requested. However, all QC batches are approved based on the requirements and recommendations of the reported methods. The analytical data presented in this report are consistent with the methods as referenced in the analytical report. Any exceptions or deviations are noted in the QC remarks section of this narrative or in the Flags/Notes and Definitions section of the report. Released By: Environmental Conservation Laboratories, Inc. Stephanie Franz Project Manager FINAL This report relates only to the sample as received by the laboratory, and may only be reproduced in full. I Page 2 of 1 3 (� �Eo www.encolabs.com SAMPLE SUMMARY/LABORATORY CHRONICLE Client ID: MW-10 Lab ID: CC10460-01 Sampled: 06/28/19 09:40 Received: 06/28/19 13:58 Parameter EPA 6010D Preparation EPA 3005A Hold Date/Time(s) 12/25/19 Prep Date/Time(s) 07/01/19 08:18 Analysis Date/Time(s) 07/02/19 10:28 Client ID: MW-11 Lab ID: CC10460-02 Sampled: 06/28/19 09:55 Received: 06/28/19 13:58 Parameter EPA 6010D Preparation EPA 3005A Hold Date/Time(s) 12/25/19 Prep Date/Time(s) 07/01/19 08:18 Analysis Date/Time(s) 07/02/19 10:31 Client ID: MW-4 Lab ID: CC10460-03 Sampled: 06/28/19 10:15 Received: 06/28/19 13:58 Parameter EPA 6010D Preparation EPA 3005A Hold Date/Time(s) 12/25/19 Prep Date/Time(s) 07/01/19 08:18 Analysis Date/Time(s) 07/02/19 10:34 Client ID: MW-5 Lab ID: CC10460-04 Sampled: 06/28/19 10:25 Received: 06/28/19 13:58 Parameter EPA 6010D Preparation EPA 3005A Hold Date/Time(s) 12/25/19 Prep Date/Time(s) 07/01/19 08:18 Analysis Date/Time(s) 07/02/19 10:36 Client ID: MW-13 Lab ID: CC10460-05 Sampled: 06/28/19 10:35 Received: 06/28/19 13:58 Parameter EPA 6010D Preparation EPA 3005A Hold Date/Time(sl 12/25/19 Prep Date/Time(s) 07/01/19 08:18 Analysis Date/Time(s) 07/02/19 10:39 Client ID: MW-14 Lab ID: CC10460-06 Sampled: 06/28/19 10:45 Received: 06/28/19 13:58 Parameter EPA 6010D Preparation EPA 3005A Hold Date/Time(s) 12/25/19 Prep Date/Time(s) 07/01/19 08:18 Analysis Date/Time(s) 07/02/19 10:41 Client ID: MW-8 Lab ID: CC10460-07 Sampled: 06/28/19 10:55 Received: 06/28/19 13:58 Parameter EPA 6010D Preparation EPA 3005A Hold Date/Time(s) 12/25/19 Prep Date/Time(s) 07/01/19 08:18 Analysis Date/Time(s) 07/02/19 10:44 Client ID: MW-17 Lab ID: CC10460-08 Sampled: 06/28/19 11:05 Received: 06/28/19 13:58 Parameter EPA 6010D Preparation EPA 3005A Hold Date/Time(s) 12/25/19 Prep Date/Time(s) 07/01/19 08:18 Analysis Date/Time(s) 07/02/19 10:54 Client ID: MW-9 Lab ID: CC10460-09 Sampled: 06/28/19 11:20 Received: 06/28/19 13:58 Parameter EPA 6010D Preparation EPA 3005A Hold Date/Time(s) 12/25/19 Prep Date/Time(s) 07/01/19 08:18 Analysis Date/Time(s) 07/02/19 10:56 Client ID: MW-3 Lab ID: CC10460-10 Sampled: 06/28/19 11:40 Received: 06/28/19 13:58 Parameter EPA 6010D Preparation EPA 3005A Hold Date/Time(s) 12/25/19 Prep Date/Time(s) 07/01/19 08:18 Analysis Date/Time(s) 07/02/19 10:59 Client ID: MW-2 Lab ID: CC10460-11 Sampled: 06/28/19 11:50 Received: 06/28/19 13:58 Parameter EPA 6010D Preparation EPA 3005A Hold Date/Time(s) 12/25/19 Prep Date/Time(s) 07/01/19 08:18 Analysis Date/Time(s) 07/02/19 11:02 Client ID: MW-2 Lab ID: CC10460-11RE3 Sampled: 06/28/19 11:50 Received: 06/28/19 13:58 Parameter EPA 6010D Preparation EPA 3005A Hold Date/Time(s) 12/25/19 Prep Date/Time(s) 07/01/19 08:18 Analysis Date/Time(s) 07/02/19 15:00 Client ID: MW-111 Lab ID: CC10460-12 Sampled: 06/28/19 12:05 Received: 06/28/19 13:58 Parameter EPA 6010D Preparation EPA 3005A Hold Date/Time(s) 12/25/19 Prep Date/Time(s) 07/01/19 08:18 Analysis Date/Time(s) 07/02/19 11:04 Client ID: MW-12 Lab ID: CC10460-13 Sampled: 06/28/19 12:15 Received: 06/28/19 13:58 Parameter EPA 6010D Preparation EPA 3005A Hold Date/Time(s) 12/25/19 Prep Date/Time(s) 07/01/19 08:18 Analysis Date/Time(s) 07/02/19 11:07 FINAL This report relates only to the sample as received by the laboratory, and may only be reproduced in full. I Page 3 Of 13 (� �Eo www.encolabs.com SAMPLE DETECTION SUMMARY Client ID: MW-30 Lab ID: CC10460-01 Anala Results Flag MDL POLL Units Method Notes Iron - Total 562 22.0 50.0 ug/L EPA 6010D Manganese - Total 18.4 1.50 10.0 ug/L EPA 6010D Client ID: MW-11 Lab ID: CC10460-02 Anala Results Flag MDL POLL Units Method Notes Iron - Total 2120 22.0 50.0 ug/L EPA 6010D Manganese - Total 145 1.50 10.0 ua/L EPA 6010D I Client ID: MW-4 Lab ID: CC10460-03 Anala Results Flag MDL POLL Units Method Notes Iron - Total 58400 22.0 50.0 ug/L EPA 6010D Manganese - Total 964 1.50 10.0 ug/L EPA 6010D Client ID: MW-5 Lab ID: CC10460-04 Anala Results Flag MDL POLL Units Method Notes Iron - Total 31000 22.0 50.0 ug/L EPA 6010D Manganese - Total 1770 1.50 10.0 ug/L EPA 6010D Client ID: MW-13 Lab ID: CC10460-05 Anala Results Flag MDL POLL Units Method Notes Iron - Total 10800 22.0 50.0 ug/L EPA 6010D Manganese - Total 249 1.50 10.0 ug/L EPA 6010D Client ID: MW-14 Lab ID: CC10460-06 Anala Results Flag MDL POLL Units Method Notes Iron - Total 4550 22.0 50.0 ug/L EPA 6010D Manganese - Total 640 1.50 10.0 ug/L EPA 6010D Client ID: MW-8 Lab ID: CC10460-07 Anala Results Flag MDL POLL Units Method Notes Iron - Total 1090 22.0 50.0 ug/L EPA 6010D Manganese - Total 299 1.50 10.0 ug/L EPA 6010D Client ID: MW-17 Lab ID: CC10460-08 Anala Results Flag MDL POLL Units Method Notes Iron - Total 9510 22.0 50.0 ug/L EPA 6010D Manganese - Total 279 1.50 10.0 ug/L EPA 6010D Client ID: MW-9 Lab ID: CC10460-09 Anala Results Flag MDL POLL Units Method Notes Iron - Total 52600 22.0 50.0 ug/L EPA 6010D Manganese - Total 2040 1.50 10.0 ug/L EPA 6010D Client ID: MW-3 Lab ID: CC10460-10 Anala Results Flag MDL POLL Units Method Notes Iron - Total 2660 22.0 50.0 ug/L EPA 6010D Manganese - Total 55.7 1.50 10.0 uo/L EPA 6010D I Client ID: MW-2 Lab ID: CC10460-11 Anala Results Flag MDL POLL Units Method Notes Iron - Total 105000 22.0 50.0 ug/L EPA 6010D Client ID: MW-2 Lab ID: CC10460-11RE3 Anala Results Flag MDL POLL Units Method Notes Manganese- Total 521000 D 150 1000 ug/L EPA 6010D Client ID: MW-1R Lab ID: CC10460-12 Anala Results Flag MDL POLL Units Method Notes Iron - Total 22700 22.0 50.0 ug/L EPA 6010D Manganese - Total 653 1.50 10.0 ug/L EPA 6010D Client ID: MW-12 Lab ID: CC10460-13 Anala Results Flag MDL POLL Units Method Notes Iron - Total 105 22.0 50.0 ug/L EPA 6010D Manganese - Total 12.7 1.50 10.0 ug/L EPA 6010D FINAL This report relates only to the sample as received by the laboratory, and may only be reproduced in full. I Page 4 Of 13 (� �Eo www.encolabs.com ANALYTICAL RESULTS Description: MW-10 Lab Sample ID:CC10460-01 Received: 06/28/19 13:58 Matrix: Ground Water Sampled: 06/28/19 09:40 Work Order: CC10460 Project: DSCA Sampled By:Adam Cox Metals (total recoverable) by EPA 6000/7000 Series Methods ^ - ENCO Cary certified analyte [NC 591] Analyte rCAS Numberl Results Flao Units DF MDL P L Batch Method Analyzed I;Y Notes Iron [7439-89-6]^ 562 ug/L 1 22.0 50.0 9GO1004 EPA 6010D 07/02/19 10:28 JDH Manganese [7439-96-5]^ 18.4 ug/L 1 1.50 10.0 9GO1004 EPA 6010D 07/02/19 10:28 JDH Description: MW-11 Lab Sample ID:CC10460-02 Received: 06/28/19 13:58 Matrix: Ground Water Sampled: 06/28/19 09:55 Work Order: CC10460 Project: DSCA Sampled By: Adam Cox Metals (total recoverable) by EPA 6000/7000 Series Methods ^ - ENCO Cary certified analyte [NC 591] Analyte rCAS Numberl Results Flaa Units DF MDL P L Batch Method Analyzed By Notes Iron [7439-89-6]^ 2120 ug/L 1 22.0 50.0 9GO1004 EPA 6010D 07/02/19 10:31 JDH Manganese [7439-96-5]^ 145 ug/L 1 1.50 10.0 9GO1004 EPA 6010D 07/02/19 10:31 JDH Description: MW-4 Lab Sample ID:CC10460-03 Received: 06/28/19 13:58 Matrix: Ground Water Sampled: 06/28/19 10:15 Work Order: CC10460 Project: DSCA Sampled By:Adam Cox Metals (total recoverable) by EPA 6000/7000 Series Methods ^ - ENCO Cary certified analyte [NC 591] Analyte rCAS Numberl Results Flaa Units DF MDL PQL Batch Method Analyzed By Notes Iron [7439-89-6]^ 58400 ug/L 1 22.0 50.0 9GO1004 EPA 6010D 07/02/19 10:34 JDH Manganese [7439-96-5]^ 964 ug/L 1 1.50 10.0 9GO1004 EPA 6010D 07/02/19 10:34 JDH Description: MW-5 Lab Sample ID:CC10460-04 Received: 06/28/19 13:58 Matrix: Ground Water Sampled: 06/28/19 10:25 Work Order: CC10460 Project: DSCA Sampled By:Adam Cox (Metals (total recoverable) by EPA 6000/7000 Series Methods ^ - ENCO Cary certified analyte [NC 591] Analyte rCAS Numberl Results Flao Units DF MDL PQL Batch Method Analyzed By Notes Iron [7439-89-6]^ 31000 ug/L 1 22.0 50.0 9GO1004 EPA 6010D 07/02/19 10:36 JDH Manganese [7439-96-5]^ 1770 ug/L 1 1.50 10.0 9GO1004 EPA 6010D 07/02/19 10:36 JDH Description: MW-13 Lab Sample ID:CC10460-05 Received: 06/28/19 13:58 Matrix: Ground Water Sampled: 06/28/19 10:35 Work Order: CC10460 Project: DSCA Sampled By: Adam Cox Metals (total recoverable) by EPA 6000/7000 Series Methods ^ - ENCO Cary certified analyte [NC 591] Analyte rCAS Numberl Results Flaa Units DF MDL PQL Batch Method Analyzed Iy Notes Iron [7439-89-6]^ 10800 ug/L 1 22.0 50.0 9GO1004 EPA 6010D 07/02/19 10:39 JDH Manganese [7439-96-5]^ 249 ug/L 1 1.50 10.0 9GO1004 EPA 6010D 07/02/19 10:39 JDH FINAL This report relates only to the sample as received by the laboratory, and may only be reproduced in full. I Page 5 Of 13 (� �Eo www.encolabs.com ANALYTICAL RESULTS Description: MW-14 Lab Sample ID:CC10460-06 Received: 06/28/19 13:58 Matrix: Ground Water Sampled: 06/28/19 10:45 Work Order: CC10460 Project: DSCA Sampled By:Adam Cox Metals (total recoverable) by EPA 6000/7000 Series Methods ^ - ENCO Cary certified analyte [NC 591] Analyte rCAS Numberl Results Flao Units DF MDL P L Batch Method Analyzed I;Y Notes Iron [7439-89-6]^ 4550 ug/L 1 22.0 50.0 9GO1004 EPA 6010D 07/02/19 10:41 JDH Manganese [7439-96-5]^ 640 ug/L 1 1.50 10.0 9GO1004 EPA 6010D 07/02/19 10:41 JDH Description: MW-8 Lab Sample ID:CC10460-07 Received: 06/28/19 13:58 Matrix: Ground Water Sampled: 06/28/19 10:55 Work Order: CC10460 Project: DSCA Sampled By: Adam Cox Metals (total recoverable) by EPA 6000/7000 Series Methods ^ - ENCO Cary certified analyte [NC 591] Analyte rCAS Numberl Results Flaa Units DF MDL P L Batch Method Analyzed By Notes Iron [7439-89-6]^ 1090 ug/L 1 22.0 50.0 9GO1004 EPA 6010D 07/02/19 10:44 JDH Manganese [7439-96-5]^ 299 ug/L 1 1.50 10.0 9GO1004 EPA 6010D 07/02/19 10:44 JDH Description: MW-17 Lab Sample ID:CC10460-08 Received: 06/28/19 13:58 Matrix: Ground Water Sampled: 06/28/19 11:05 Work Order: CC10460 Project: DSCA Sampled By:Adam Cox Metals (total recoverable) by EPA 6000/7000 Series Methods ^ - ENCO Cary certified analyte [NC 591] Analyte rCAS Numberl Results Flaa Units DF MDL PQL Batch Method Analyzed By Notes Iron [7439-89-6]^ 9510 ug/L 1 22.0 50.0 9GO1004 EPA 6010D 07/02/19 10:54 JDH Manganese [7439-96-5]^ 279 ug/L 1 1.50 10.0 9GO1004 EPA 6010D 07/02/19 10:54 JDH Description: MW-9 Lab Sample ID:CC10460-09 Received: 06/28/19 13:58 Matrix: Ground Water Sampled: 06/28/19 11:20 Work Order: CC10460 Project: DSCA Sampled By:Adam Cox (Metals (total recoverable) by EPA 6000/7000 Series Methods ^ - ENCO Cary certified analyte [NC 591] Analyte rCAS Numberl Results Flao Units DF MDL PQL Batch Method Analyzed By Notes Iron [7439-89-6]^ 52600 ug/L 1 22.0 50.0 9GO1004 EPA 6010D 07/02/19 10:56 JDH Manganese [7439-96-5]^ 2040 ug/L 1 1.50 10.0 9GO1004 EPA 6010D 07/02/19 10:56 JDH Description: MW-3 Lab Sample ID:CC10460-10 Received: 06/28/19 13:58 Matrix: Ground Water Sampled: 06/28/19 11:40 Work Order: CC10460 Project: DSCA Sampled By: Adam Cox Metals (total recoverable) by EPA 6000/7000 Series Methods ^ - ENCO Cary certified analyte [NC 591] Analyte rCAS Numberl Results Flaa Units DF MDL PQL Batch Method Analyzed Iy Notes Iron [7439-89-6]^ 2660 ug/L 1 22.0 50.0 9GO1004 EPA 6010D 07/02/19 10:59 JDH Manganese [7439-96-5]^ 55.7 ug/L 1 1.50 10.0 9GO1004 EPA 6010D 07/02/19 10:59 JDH FINAL This report relates only to the sample as received by the laboratory, and may only be reproduced in full. I Page 6 Of 13 (� �Eo www.encolabs.com ANALYTICAL RESULTS Description: MW-2 Lab Sample ID:CC10460-11 Received: 06/28/19 13:58 Matrix: Ground Water Sampled: 06/28/19 11:50 Work Order: CC10460 Project: DSCA Sampled By:Adam Cox Metals (total recoverable) by EPA 6000/7000 Series Methods ^ - ENCO Cary certified analyte [NC 591] Analyte rCAS Numberl Results Flao Units DF MDL P L Batch Method Analyzed I;Y Notes Iron [7439-89-6]^ 105000 ug/L 1 22.0 50.0 9GO1004 EPA 6010D 07/02/19 11:02 3DH Manganese [7439-96-5]^ 521000 D ug/L 100 150 1000 9GO1004 EPA 6010D 07/02/19 15:00 ]DH Description: MW-1R Lab Sample ID:CC10460-12 Received: 06/28/19 13:58 Matrix: Ground Water Sampled: 06/28/19 12:05 Work Order: CC10460 Project: DSCA Sampled By: Adam Cox Metals (total recoverable) by EPA 6000/7000 Series Methods ^ - ENCO Cary certified analyte [NC 591] Analyte rCAS Numberl Results Flaa Units DF MDL P L Batch Method Analyzed By Notes Iron [7439-89-6]^ 22700 ug/L 1 22.0 50.0 9GO1004 EPA 6010D 07/02/19 11:04 ]DH Manganese [7439-96-5]^ 653 ug/L 1 1.50 10.0 9GO1004 EPA 6010D 07/02/19 11:04 ]DH Description: MW-12 Lab Sample ID:CC10460-13 Received: 06/28/19 13:58 Matrix: Ground Water Sampled: 06/28/19 12:15 Work Order: CC10460 Project: DSCA Sampled By:Adam Cox Metals (total recoverable) by EPA 6000/7000 Series Methods ^ - ENCO Cary certified analyte [NC 591] Analyte rCAS Numberl Results Flaa Units DF MDL PQL Batch Method Analyzed By Notes Iron [7439-89-6]^ 105 ug/L 1 22.0 50.0 9GO1004 EPA 6010D 07/02/19 11:07 JDH Manganese [7439-96-5]^ 12.7 ug/L 1 1.50 10.0 9GO1004 EPA 6010D 07/02/19 11:07 JDH FINAL This report relates only to the sample as received by the laboratory, and may only be reproduced in full. I Page 7 Of 13 (� �Eo www.encolabs.com QUALITY CONTROL DATA Metals (total recoverable) by EPA 6000/7000 Series Methods - Quality Control Batch 9G01004 - EPA 3005A Blank (9G03004-BLK3) Prepared: 07/01/2019 08:18 Analyzed: 07/02/2019 09:46 Spike Source %REC RPD Analvte Result Flaq Q Units Level Result %REC Limits RPD Limit Notes Iron 22.0 U 50.0 ug/L Manganese 1.50 U 10.0 ug/L LCS (9G03004-BS1) Prepared: 07/01/2019 08:18 Analyzed: 07/02/2019 09:52 Spike Source %REC RPD Analvte Result Flaq POL Units Level Result %REC Limits RPD Limit Notes Iron 994 50.0 ug/L 1000 99 80-120 Manganese 202 10.0 ug/L 200 101 80-120 Matrix Spike (9G03004-MS1) Prepared: 07/01/2019 08:18 Analyzed: 07/02/2019 09:55 Source: CC09943-02 Spike Source %REC RPD Analvte Result Flaq POL Units Level Result %REC Limits RPD Limit Notes Iron 3420 50.0 ug/L 1000 2440 98 75-125 Manganese 1020 10.0 ug/L 200 817 101 75-125 Matrix Spike Dup (9G01004-MSD1) Prepared: 07/01/2019 08:18 Analyzed: 07/02/2019 09:57 Source: CC09943-02 Spike Source %REC RPD Analvte Result Flaq POL Units Level Result %REC Limits RPD Limit Notes Iron 3420 50.0 ug/L 1000 2440 98 75-125 0.03 20 Manganese 1020 10.0 ug/L 200 817 101 75-125 0.08 20 Post Spike (9G01004-PSI) Prepared: 07/01/2019 08:18 Analyzed: 07/02/2019 09:59 111 Source: CC09943-02 Analvte Iron Manganese Spike Result Flaq POL Units Level 3.51 0.0500 mg/L 1.00 1.04 0.0100 mg/L 0.200 Source %REC Result %REC Limits RPD 2.44 106 80-120 0.817 110 80-120 RPD Limit Notes FINAL This report relates only to the sample as received by the laboratory, and may only be reproduced in full. I Page 8 Of 13 (� �Eo www.encolabs.com FLAGS/NOTES AND DEFINITIONS B The analyte was detected in the associated method blank. D The sample was analyzed at dilution. J The reported value is between the laboratory method detection limit (MDL) and the laboratory method reporting limit (MRL), adjusted for actual sample preparation data and moisture content, where applicable. U The analyte was analyzed for but not detected to the level shown, adjusted for actual sample preparation data and moisture content, where applicable. E The concentration indicated for this analyte is an estimated value above the calibration range of the instrument. This value is considered an estimate. MRL Method Reporting Limit. The MRL is roughly equivalent to the practical quantitation limit (PQL) and is based on the low point of the calibration curve, when applicable, sample preparation factor, dilution factor, and, in the case of soil samples, moisture content. PQL PQL: Practical Quantitation Limit. The PQL presented is the laboratory MRL. N The analysis indicates the presence of an analyte for which there is presumptive evidence (85% or greater confidence) to make a "tentative identification". P Greater than 25% concentration difference was observed between the primary and secondary GC column. The lower concentration is reported. [CALC] Calculated analyte - MDL/MRL reported to the highest reporting limit of the component analyses. FINAL This report relates only to the sample as received by the laboratory, and may only be reproduced in full. I Page 9 of 13 m 0 c n m N O 0 O J m co m 0 m qD � W .. 3 m m C m _ 3 m m a" m z 0 0 y N � m y m m ' a o 8 T y C F m � o O " 3 a 3 o 3 m m c 0- v D } m a co D a c m 3 N O �m o 0 C O x 3 CD a co co J D r a yr 0 3 3 3 m CD m G G. F co w 0 t O 'o 0 n� fD m w 0 Q m o O � 3 33 C 7 0 CD a a� �n_I �4i\p Q I CD I t I I a � p a a n m d J -TT / 0 !' r' !z z z ! E Cz) V1C 2 R z V� � � z �x 0 o m J �► � � � � ..i .i �► J �► J j' yF y O0 n X X X. X X X �.x X X X X X v tk 7 D v U 2 n O 7 N Cz cC m C) �� v jo cog Z ' a n m N N x n m a Z J o = (,J CD 0 0 I;o 00 .�- 0 v N o C x Z r 0 v 1+ N iv � L CD �! co c A O O I N n 0 0 r) N � m T r w 'm_ A Vl W D O '0 D r Q N c A a ='' > CL� 00 C�3 0 305 o > c m gy/ 07 co N ( ) cr fD irJ N TCD> x o Q ( K <, (D 4 r m o m c !n m N o �I I I m n � I c Fe,Mn m N w D 4 Z I 0 I I C. O O G n � c s o m A V � I N r cn CD0 g " a cc 3 m D C N N (D i \ X CD o m N O CD m c (' 4 Q —' OL N m 7 O CD Q O a y m = w �; 0 w ® Page 10 of 13 o;i x' N cc a m N a 0 G J. J f0C m N R O m m p D m 3 c � N c C a m m O N y y m m 6 �a o 3 m a) v � J � v m tv 0 o W iJo a c m m N v 6^� 3 T g m J m J m J 9° R 3 0 °�° m < J M m a m 3 m3 0 (m m j m m o. m W a � ,^ W � fO 0 a ;o D -. n o i N i 'fl w m Q D CD 3 3 rl CD w _I Q m i m 3 0 m a d x n � o 0 N r x x x x x x Ix T Z 7 H m m m_ Da (� v v -4 ^^n `ly co m C.mJ- m O w m N T` n N � ? m Z COD o w n OS O O J N C c O C N� N L O CD O N C. w m I A NA (A co ) CD '�D 0 � OID �» :O . pX' 0 m w O - 1 o C7 3 C) 7 Ci 3 O 3 0 :3 a5 > 3 m 01 0p N ♦r I fD � as � I (D m w o�Di n� VCDN `V �� m 5 J r m y NRL m o 3 m � m m N_ O Fe,Mn w n v 0 CD 1 0 3CD .p MC T N 0 co c c Z O m w CD c (D y N CD :3 W C c a y N 3 0 �« d� w CD Page 11 of 13 Sample Preservation Verification ENC• Cary Work Order: CC10460 Client: URS - Charlotte (UR004) Logged In: 28-Jun-19 15:37 EI�I Project: DSCA Project #: 92-0021 T&J Cleaners/ _ Logged By: John C King Preservation Check Performed By: t Date/Time:�6noo CC10460-01 Cont Type Pres (pH) Requirement pH Checked / In Control pH Adjusted DateTme Adjusted Reagent Used/Comments A 250mLP+HNO3 <2 Y�/ N / NA Y / (Nj / NA CC10460-02 Cont Type Pres (pH) pH Checked ! pH Adjusted DatelTime Reagent Used/Comments Requirement In Control Adjusted A 250mLP+HNO3 <2 Y / N / NA Y / N / NA C C 10460-03 Cont 'Pe Pres (pH) Requirement pH Checked / In Control pH Adjusted Date/TimeReagent Adjusted Used/Comments A 250mLP+HNO3 <2 Y / N / NA Y / N / NA CC10460-04 Cont Type Pres (pH) Requirement pH Checked / I In Control pH Adjusted Date/Time I Adjusted Reagent Used/Comments A 250mLP+HNO3 <2 / N / NA I Y / (q/ NA CC10460-05 Cont Type .� Pres (pH) Requirement pH Checked / In Control pH Adjusted DateTme Adjusted Reagent Used/Comments A 250mLP+HNO3 <2 / N / NA Y / / NA CC10460-06 Cont Type Pres (pH) pH Checked / pH Adjusted DateTme Reagent Used/Comments Requirement In Control Adjusted A 250mLP+HNO3 <2 ;J / N / NA I Y / N / NA CC10460-07 Cont Type Pres (pH) Requirement 1pH Checked / In Control pH Adjusted Date/Time Adjusted Reagent Used/Comments A 250mLP+HNO3 <2 / N / NA I Y / "N / NA CC10460-08 Cont Type Pres {pH) Requirement pH Checked / In Control pH Adjusted DateTme Adjusted Reagent Used/Comments A 250mLP+HNO3 <2 Y / N / NA Y / 6 / NA CC10460-09 Cont Type Pres (pH) Requirement pH Checked / I In Control pH Adjusted Date/Time Adjusted Reagent Used/Comments A 250mLP+HNO3 <2 Y / N / NA I Y / N / NA Page 12 of 13 C:\ELMNT\Print\wko_PreservationCheck.rpt age 1 Sample Preservation Verification ENCO Cary Work Order: CC10460 Client: URS - Charlotte (UR004) Logged In: 28-Jun-19 15:37 Preservation Check Performed By: CC10460-10 Project: DSCA Project #: 92-0021 T&J Cleaners/ Logged By: John C King Date/Time: � Cont Type �'� �r� Pres (pH) Requirement pH Checked / In Control pH Adjusted DateMme Adjusted Reagent Used/Comments A 250mLP+HNO3 <2 Y / N / NA Y / ,N / NA CC10460-11 Cont Type Pres (pH) JpH Requirement Checked / In Control pH Adjusted DateMme Adjusted Reagent Used/Comments A 250mLP+HNO3 <2 r / N / NA I Y /, / NA CC10460-12 Cont T e Pres (pH) pH Checked / I pH Adjusted DateMme Reagent Used/Comments � P L o , � :P � ., x< quirement In Control Adjusted A 250mLP+HNO3 <2 Y / N / NA Y / N / NA CC10460-13 Cont Type Pres (pH) Requirement pH Checked ! In Control pH Adjusted Date/Time Adjusted Reagent Used/Comments A 250mLP+HNO3 <2 / N / NA Y / / NA Rea ent Name ID 1 2 pH Strip ID: Lyz;,w Rea ent Name ID 3 4 Rea ent Name ID 5 6 C:\ELMNT\Print\wko_Preservation Check. rpt Page 13 of 13 age 2 ATTACHMENT 16 SITE LOCATION MAP I �Js73 � - t � -r �• - . • {.'.. . } 4 Ldkb Pift - '•' - a'� ] i 'r I • IS II IF. w�� 4 I4 ■ x� � •.I. _ f - � fix'• 4/y ' y '• F' .� t SITE 411 - a? . 0 r� i •. 1��}nn�5+ a �t } ��k� J2'll�. �_ � -�.I'-r� �� .. T � f•• } �� i ;y • h r �., :rf,t .* ••--- � � a + ; - -_ Y ''fir -- '- '�.. miF- Reference: 7.5 Minute USGS Topographic Map: Raleigh East, North Carolina (1998) LID Site Location Map m 595 CARNEGIE BLVC, SUITE 3T0 T&J Cleaners N N AiIJ _ TELCHARLOTTE,NC20209 D_EoD Q� 2423 Crabtree Boulevard w x ' oo m TEL (TOd) 553-6150 a' J S (n i M FAX: (704)553-6151 �rwmwl+lOwllry U Raleigh, North Carolina SHEEI DSCA Site ID #DC920021 ATT. 16 ATTACHMENT 17 PHOTOGRAPHIC DOCUMENTATION AECOM PHOTOGRAPHIC LOG Site Name: Site Location: DSCA Site No. T&J Cleaners 2423 Crabtree Boulevard, Raleigh, NC DC920021 Photo No. Date: 6/26/19South West Elevation Direction Photo Taken: ® 59°NE (T) OO 35°48-22"N, 78°36-51"W ±16.4ft A 188ft Northeast — ;R jj Description: General overview of w MW-5 and MW-13 during site construction activities. '•, �' � � *u R .,� " _ Photo No. Date: 2 6/26/19 Direction Photo Taken: North Description: General overview of MW-5 during site construction activities cy' .e, r--i �, i�o; -« �t.� ,tea ~- ►+F .. .e ,� 0 355°N (T) Q 35°48-22"N, 78°36-51"W ±16.4ft A 179ft 4 .�y4¢r A=COM PHOTOGRAPHIC LOG Site Name: Site Location: DSCA Site No. T&J Cleaners 2423 Crabtree Boulevard, Raleigh, NC DC920021 Photo No. Date: 3 6/26/19 0 297°NW (T) O 35'48'22"N, 78'36'51"W ±16.4ft ♦ 196ft Direction Photo Taken: Pam,` NA r Yr r ., Description:` View of MW-5 with well vault lid removed. y.d `r FF X ........... Photo No. 4 Date: 6/26/19 East Elevation 0 285°W (T) O 35°48'22°N, 78°36'51"W ±16.4ft A 191ft Direction Photo Taken: NA' g` Description: Closeup view of MW-5 well cap and well vault area. K r? A=COM PHOTOGRAPHIC LOG Site Name: Site Location: DSCA Site No. T&J Cleaners 2423 Crabtree Boulevard, Raleigh, NC DC920021 Photo No. Date: 5 6/26/19 South West Elevation Direction Photo Taken: 0 35°NE (T) O 35048'19"N, 78°36'50"W ±16.4ft A 225ft Northeast Description: Northeastern view of MW-12 during site y + construction activities. Ly ., Matt. Photo No. Date: 6 6/26/19 Direction Photo Taken: South Description: Southern view of MW- 12 during site construction activities. 0183°S (T) O 35°48'19"N, 78°36'49"W ±16.4ft A 235ft _..r...,.� s A=COM PHOTOGRAPHIC LOG Site Name: Site Location: DSCA Site No. T&J Cleaners 2423 Crabtree Boulevard, Raleigh, NC DC920021 Photo No. Date: 7 6/17/19 South West Elevation Direction Photo Taken: 0 250NE (T) O 35048'22"N, 78°36'51"W ±16.4ft A 176ft NA'" ` Description:, Overview of MW-12 -•\� during site construction ; ; - _ K , Y activities. _ 1_ • -4 Lx .' Photo No. Date: 8 6/26/19 Direction Photo Taken: NA Description: Overview of MW-12 during site construction activities. 0 25°NE (T) OO 35048'22"N, 78°36'51"W +16.4ft A 176ft 5 k A=COM Site Name: T&J Cleaners Photo No. Date: 9 7/1/19 Direction Photo Taken: South Description: Overview of area containing DMW-18 and MW-12 during repair activities. Site Location: PHOTOGRAPHIC LOG DSCA Site No. 2423 Crabtree Boulevard, Raleigh, NC I DC920021 _ .7- - y Ua r Photo No. Date: 10 7/1/19' Direction Photo Taken: A=COM Site Name: T&J Cleaners Photo No. Date: 11 7/1/19 Direction Photo Taken: North Description: Overview of DMW-18 and MW-12 after well pad repairs were completed. Site Location: 2423 Crabtree Boulevard, Raleigh, NC PHOTOGRAPHIC LOG DSCA Site No. DC920021 0M Photo No. Date:+ 12 7/1/19 x�� - RA Direction Photo } Taken: NA Description:- ', Close up view of MW- 1 R after well pad repairs. r s .r' AECOM PHOTOGRAPHIC LOG Site Name: Site Location: DSCA Site No. T&J Cleaners 2423 Crabtree Boulevard, Raleigh, NC DC920021 Photo No. Date: 13 7/1 /19 Direction Photo Taken: West 7 Description: General overview of .<• > MW-1 R after well pad „.. repairs. m. - A -- Photo No. Date: 14 7/1/19 Direction Photo Taken: Northwest Description: Overview of MW-5 and MW-13 prior to well pad repairs. I AECOM Site Name: T&J Cleaners Photo No. Date: 15 7/1/19 Direction Photo Taken: Northwest Description: Overview of MW-5 and MW-13 after well pad repairs Site Location: 2423 Crabtree Boulevard, Raleigh, NC PHOTOGRAPHIC LOG DSCA Site No. DC920021 Photo No. Date:qW 16 7/1 /19 - Z Direction Photo r Taken: a i NA- k Description: --�` Closeup view of MW-12 /✓.= ,7` f after well pad repairs. a. t is- AECOM PHOTOGRAPHIC LOG Site Name: Site Location: DSCA Site No. T&J Cleaners 2423 Crabtree Boulevard, Raleigh, NC DC920021 Photo No. Date: 4_ _ 17 7i1i19 Direction Photo Taken: NA , ' ,�...v. %-, f • t �� Description: Closeup view of DMW- 18 after well pad repairs r z have been completed. �T`` .. 'IVA1