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HomeMy WebLinkAboutDC760001_20240719_GroundwaterMonitoringReport GROUNDWATER MONITORING REPORT FORMS DSCA ID No.: Submittal Date: Reporting Period:to Type of Report:One-Time Event Quaterly Semi-Annual Annual Groundwater Monitoring Report Forms for North Carolina Dry-Cleaning Solvent Cleanup Act Program Prepared By: Facility Name:Kizer's Automatic Self Service 133 East Taft Avenue, Asheboro, Randolph County, North Carolina 27203 2725 East Millbrook Road, Suite 121, Raleigh, North Carolina 27604 ATC Associates of North Carolina, P.C. July 19, 2024 DC760001 Nov-23 Nov-23 Table of Contents DSCA ID No.: DC760001 Form/Att . No. Check box if included Form 1 Report Summary Form 2 Quality Assurance/Quality Control Procedures Form 3 Results, Conclusions and Recommendations Att. 1 Att. 2 Att. 3 Att. 4 Att. 5 Disposal of IDW receipts from receiving facilities, or any required harzardous waste GWMR TOC Description Grooundwater Monitoring Report Attachments Groundwater Monitoring Report Forms Report Summary DSCA ID No.: DC760001 Dates samples were collected: Number of existing monitoring wells: List the sampled monitoring wells: List the sampled water supply wells: List surface water samples collected: Date analyses were performed: Were any holding times exceeded? Dates monitoring/supply wells were gauged: disposal? Average depth to groundwater: Groundwater flow direction: Was the static groundwater level above the top of the well screen in any wells? If Yes, indicate which wells: Is the aquifer: Were any existing monitoring wells damaged? If Yes, indicate which wells: Has the groundwater plume been defined? Any ongoing assessment activities? If Yes, provide details in the space below: Any ongoing remediation activites? If Yes, provide details in the space below: Any significant changes in the subsurface conditions? If Yes, provide details in the space below: 11/29/2023 and 11/30/2023 7 MW-5, MW-6, MW-7, MW-8, MW-9, MW-10S, MW-10D 12/11/2023 and 12/12/2023 Does investigation derived waste (IDW) generated during these activities still remain at the site pending GWMR Form 1 ATC is conducting interior assessment activities that include soil, groundwater, and sub-slab gas sampling in July 2024. Since 2018, a sub-slab depressurization system (SSDS) has been active at the site mitigating vapor intrusion risk in the Tranzformations, Studio J Dance Center, and Trogdon Bail Bonds tenant spaces. ATC conducts quarterly vacuum and ppbRAE measurements, quarterly depth to groundwater measurements, semi-annual sub- slab soil-gas sampling, and semi-annual indoor air sampling to verify continued effectiveness of the SSDS. N/A 10.55 The tetrachloroethylene (PCE) concentration in MW-6 was above the Title 15A NCAC 02L .0202 Groundwater Standards (2L Standards) at 0.00275 milligrams per liter (mg/L) in November 2020 and decreased to below detectable limits in November 2023. Comparatively, the PCE concentration in MW-7 was below detectable limits in November 2020 and increased to above the 2L Standards in November 2023 (0.00103 mg/L). Cis-1,2-dichloroethylene (cis-1,2-DCE) decreased to below the 2L Standards in MW- 10D. 11/29/2023 West MW-10D N/A Yes No Yes No Confined Unconfined Perched Yes No Yes No Yes No Yes No Yes No Yes No Quality Assurance/Quality Control Procedures DSCA ID No.: DC760001DC760001 Describe the specific sampling technicque employed during the collection of all ground water samples. The EPA approved method for VOC analysis used to run groundwater samples from the site is SW846 8260D. Groundwater samples are directly injected into a gas chromatograph (GC) and then introduced directly to a capillary column where they are flash evaporated for analysis. The column is temperature-programmed to separate the analytes, which are then detected with a mass spectrometer (MS) interfaced to the GC. The holding time for VOC analysis via EPA Method 8260D is 14 days from collection to analysis. GWMR Form 2 Describe the standard quality assurance/quality control (QA/QC) procedures which are practiced in order to ensure that the samples are representative of actual conditions and that analytical results are valid. Describe the EPA approved methods used to extract and analyze the samples submitted the laboratory. Reference the maximum holding time for each type of analysis performed. ATC followed standard low flow sampling procedures for volatile organic compounds (VOCs) as outlined in the current United States Environmental Protection Agency Laboratory Services and Applied Science Division (USEPA LSASD) Groundwater Sampling Operating Procedure. Groundwater samples were collected in three 40 milliliter vials preserved with hydrochloric acid and filled to zero headspace for each monitoring well. Each sample was then placed in an ice filled cooler. A chain-of-custody form was completed for the sampling event and accompanied the samples to the laboratory. Chemical analyses were performed on groundwater samples by Pace Analytical Laboratory in Mt. Juliet, Tennessee. Extractions and analyses were performed in accordance with standard EPA Method 8260D for VOCs. ATC has reviewed the laboratory report, and no quality assurance/quality control issues were identified. The data are deemed usable for the purposes of the assessment activities and conclusions documented in this submittal. Groundwater samples were collected using low flow sampling methods as outlined in the current US EPA LSASD Groundwater Sampling Operating Procedure. Well purging and sampling were completed using a peristaltic pump and the soda straw method. The polyethylene tubing was replaced at each monitoring well location prior to sampling. Field parameters, including pH, oxidation/reduction potential, conductivity, specific conductance, dissolved oxygen, and temperature, were measured every three minutes using a YSI multimeter and flow-through cell. Before obtaining a sample, field parameters were allowed to stabilize within EPA guidelines to ensure a representative groundwater sample was collected. Results, Conclusions and Recommendations DSCA ID No.: DC760001 Sampling Date Sample ID Concentration [mg/L] Sampling Date Sample ID Concentration [mg/L] 11/30/2023 MW-9 99.3 4/24/2017 MW-9 120 11/30/2023 MW-9 1.05 4/24/2017 MW-9 1.2 11/30/2023 MW-10S 0.000450J 11/30/2020 MW-10S 0.00100 11/30/2023 MW-9 0.799 4/27/2017 MW-9 0.84J 11/30/2023 MW-10S 0.000340J 11/30/2020 MW-9 0.0150 11/30/2023 MW-8 0.0195 3/29/2018 MW-10S 0.20J ATC recommends further groundwater investigation to delineate the extent of the plume, as funding allows. In the interim, ATC recommends continued monitoring and operation of the sub-slab depressurization system. cis-1,2-Dichloroethylene Benzene Naphthalene Instructions: Discuss any trends or changes noted in analytical results. Recommendations The results of recent and historical groundwater sampling events indicate a plume of groundwater impacted by PCE, trichloroethylene, cis-1,2-DCE, vinyl chloride, benzene, and naphthalene at concentrations above the 2L Standards. PCE impacts have not been adequately delineated in the shallow aquifer. The vertical extent of impacts have not been delineated as the only deep well associated with the site is impacted above 2L Standards. Based on the recent groundwater sampling event, the length of the PCE plume is approximately 340 feet and appears mostly confined to the source property and one off-source property to the south. The site has only been sampled three times and the GSI Mann-Kendall Toolkit requires a minimum of four data points to generate statistical trends; however, it appears PCE is generally stable across the site. Detected at Site To-date Conclusions Trichloroethylene GWMR Form 3 Results Maximum Concentration Detected in Groundwater Chemical Most Recent Event Tetrachloroethylene Vinyl Chloride ATTACHMENT 1 DISPOSAL DOCUMENTATION FOR INVESTIGATIVE DERIVED WASTE ANALYTICAL DATA TABLES DSCA ID No.: Submittal Date: Analytical Data Tables for North Carolina Dry-Cleaning Solvent Cleanup Act Program Prepared By: Facility Name:Kizer's Automatic Self Service 133 East Taft Avenue, Asheboro, Randolph County, North Carolina 27203 2725 East Millbrook Road, Suite 121, Raleigh, North Carolina 27604 ATC Associates of North Carolina, P.C. July 19, 2024 DC760001 Table of Contents DSCA ID No.: DC760001 Table/ Att. No. Check box if included Table 1 Site Chronology 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 Table 7 Groundwater Elevation Data Table 8 Analytical Data for Groundwater 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 Att. 1 Site map showing location(s) of soil boring(s). Att. 2 Att. 3 Soil isoconcentration maps. Att. 4 Site map showing location(s) of monitoring well(s). Att. 5 Att. 6 Groundwater gradient map for each sampling event. Att. 7 Att. 8 Att. 9 Map showing location(s) of surface water sample(s) (if applicable). Att. 10 Att. 11 Att. 12 Att. 13 Att. 14 Air and soil gas concentration map showing the concentration at each sampling point. Att. 15 Att. 16 Att. 17 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. ADT TOC Description Attachments Tables Groundwater concentration trend plots. Water Supply Well Location Map Photolog USGS Quad map with plotted water well location(s)within the 1,500 foot and 0.5 mile radii of the site (if applicable). Signed laboratory analytical reports including chain-of custody and quality assurance/quality control (QA/QC)documentation (only if not previously submitted). Soil contaminant concentration maps showing the concentration at each sampling point. Site map showing location(s) of indoor air, outdoor air, or soil gas samples. Well completion diagrams and records of construction submitted to state. 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. Surface water concentration map showing the concentration at each sampling point (if applicable). Site map showing location(s) of monitoring well(s) for natural attenuation parameters. Table 1: Site Chronology DSCA ID No.: DC760001 Chronology of Events 7/29/1998 Groundwater Management Associates submitted a Notification of Inactive Hazardous Substance or Waste Disposal Site to the North Carolina Division of Waste Management for the Hillside Shopping Center. The submitted documentation included results from installation and sampling of four temporary groundwater monitoring wells (MW-1 through MW-4) installed in April 1998. 8/30/2016 The Kizer's Automatic Self Service Laundry at the Hillside Shopping Center was accepted into the DSCA Program. 4/10/2017 - 4/13/2017 ATC supervised installation of five permanent monitoring wells (MW-5, MW-6, MW-7, MW-8, and MW-9) and advancement of six soil borings (SB-1 through SB-6). 4/24/2017 - 4/27/2017 ATC sampled monitoring wells MW-5, MW-6, MW-7, MW-8, and MW-9. ATC performed vapor intrusion assessment including collection of 8-hour indoor air samples (IA-1, IA-2, and IA-3) and two sub-slab gas samples (SS-1 and SS-2) within two tenant spaces that encompassed the former dry-cleaner footprint (Taxes, Etc. and Studio J. Dance Center). ATC also advanced two soil borings (SB-7 and SB-8) within the Taxes, Etc. and Studio J. Dance Center. A receptor survey was also performed to identify water supply wells and surface water features within 0.5 miles of the site. 5/31/2017 - 6/01/2017 ATC performed additional vapor intrusion assessment at the site. Sampling was performed inside the Taxes, Etc. and Studio J. Dance Center tenant spaces, as well as a third tenant space, Hillside Barber Shop. Indoor air samples were collected using 8-hour Summa canisters in the same three locations previously sampled in April 2017 (IA-1 through IA-3). Two additional indoor air samples (IA-4 and IA-5) were collected in the Studio J. Dance Center and a sixth sample (IA-6) was collected in the Hillside Barber Shop tenant space, all with 8-hour Summa canisters. Three sub-slab gas samples were also collected using permanent vapor pins inside the Studio J. Dance Center and Hillside Barber Shop (SS-3 through SS- 5). 3/21/2018 - 3/29/2018 ATC supervised installation of a sub-slab depressurization system (SSDS) that included two extraction points in the Taxes, Etc., one extraction point in the Studio J. Dance Center and two extraction points in the Hillside Barber Shop tenant spaces. Prior to installation of the extraction points, ATC installed four temporary vapor pins (SS-6, SS-7, SS-8 and SS- 11) and collected sub-slab gas samples from the temporary pins and one existing permanent vapor pin (SS-2). The temporary and existing vapor pins were located adjacent to the locations where extraction points would be installed. After the extraction points were installed through the slab, ATC attached a temporary high-vacuum radon fan to each extraction point and collected a high-volume sub-slab gas sample from each point with summa canisters (HVS-1 through HVS-5). ATC also installed and and collected samples from two temporary sub-pavement vapor pins (SS-9 and SS-10) to assess potential for vapor intrusion in another area of the Hillside Shopping Center building. ATC also performed additional soil and groundwater assessment. Six soil borings were advanced, including one inside the Hillside Barber Shop tenant space (SB-9), two inside the Studio J. Dance Center tenant space (SB-10 and SB-11) and three exterior borings (SB-12, SB-13 and SB-14). Two Type II groundwater monitoring wells were installed and sampled, including one shallow (MW-10S) and one deeper (MW-10D) well. 4/5/2018 ATC supervised installation of three high-vacuum radon fans, with one fan connected to the extraction point(s) in each of the three tenant spaces. 4/17/2018 ATC supervised a North Carolina licensed electrician to connect the radon fans to a permanent electrical supply, and the SSDS was placed into operation. 6/6/2018 Seven indoor air samples (IA-1 through IA-7) were collected with 8-hour summa canisters. 9/11/2018 ATC submitted an Assessment Report documenting activities performed between April 2017 and June 2018. 4/1/2019 ATC supervised the advancement of five soil borings (SB-15 through SB-19) and installation and sampling of three soil gas monitoring points (SGMP-1 through SGMP-3). 2/13/2019 Six indoor air samples (IA-1 through IA-4, IA-6, and IA-7) were collected with 8-hour summa canisters. 6/18/2019 ATC submitted a Soil and Soil Gas Sampling Report documenting April 2019 activities. 8/21/2019 Six indoor air samples (IA-1 through IA-4, IA-6, and IA-7) were collected with 8-hour summa canisters. 1/30/2020 ATC submitted an Indoor Air Sampling and Mitigation System Operation and Maintenance Report documenting 2019 indoor air sampling and SSDS operation and maintenance (O&M) activities. 2/19/2020 Five indoor air samples (IA-1 through IA-4, and IA-6) were collected with 8-hour summa canisters. 8/14/2020 Five indoor air samples (IA-1 through IA-4, and IA-6) were collected with 8-hour summa canisters. 11/30/2020 ATC sampled monitoring wells MW-5, MW-6, MW-7, MW-8, MW-9, MW-10S, and MW-10D. 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. Date ADT 1 Page 1 of 3 Table 1: Site Chronology DSCA ID No.: DC760001 Chronology of Events 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. Date ADT 1 2/8/2021 Five indoor air samples (IA-1 through IA-4, and IA-6) were collected with 8-hour summa canisters. 3/8/2021 ATC submitted a Groundwater Monitoring Report documenting the November 2020 sampling event. 3/17/2021 Three indoor air samples (IA-4, IA-5 and IA-8) were collected with 8-hour summa canisters. Depth to groundwater measurements were collected from three groundwater monitoring wells (MW-8, MW-9 and MW-10S). 3/31/2021 ATC submitted an Indoor Air Sampling and Mitigation System Operation and Maintenance Report documenting 2020 indoor air sampling and SSDS O&M activities. 4/19/2021 - 4/27/2021 Indoor air samples were collected at IA-4 using both an 8-hour summa canister and a Radiello passive sampler deployed for seven days. Permanent vapor pins were installed at six new sub-slab soil-gas sample locations (SS-12 through SS-17) and one abondoned sub-slab soil-gas sample location (SS-3) inside the building. Temporary vapor pins were installed at historical sub-pavement soil-gas sample locations SS-9 and SS-10. Photoionization detector and vacuum pressure readings were obtained from the new and four existing (SS-1, SS-5, SS-9, SS-10) vapor pins. Sub-slab soil-gas samples were collected at two interior permanent vapor pin locations (SS-3 and SS-16), and sub-pavement soil-gas samples were collected from the two exterior temporary vapor pins (SS-9 and SS-10), using 1-liter summa canisters. Depth to groundwater measurements were collected from three groundwater monitoring wells (MW-8, MW-9 and MW-10S). 5/3/2021 Two indoor air samples (IA-9 and IA-10) were collected with 8-hour summa canisters in the Taste of Asia restaurant tenant space. 7/21/2021 ATC replaced the SSDS radon fan connected to the extraction points located in the Trogdon Bail Bonds (former Hillside Barber Shop) tenant space. Depth to groundwater measurements were collected from three groundwater monitoring wells (MW-8, MW-9 and MW-10S). 8/11/2021 Five indoor air samples (IA-1 through IA-4, and IA-6) were collected with 8-hour summa canisters. 9/10/2021 ATC submitted an Indoor Air and Sub-slab Soil-gas Assessment Letter Report documenting the results of indoor air and sub-slab soil-gas sampling as well as depth to groundwater measurement activities performed between February and May 2021. 12/20/2021 - 12/21/2021 ATC supervised expansion of the SSDS to include addition of three new extractions points, one in the Trodgdon Bail Bonds tenant space (EP-6) and two in the Studio J Dance Center tenant space (EP-7 and EP-8). The new extraction points were connected to the SSDS fans tied to the original extraction points located in each tenant space. 1/12/2022 ATC supervised replacement of the SSDS radon fan connected to the extraction points located in the Studio J Dance Center tenant space 2/24/2022 ATC collected six indoor air samples with 8-hour summa canisters (IA-1, IA-4, IA-5 through IA-8) 2/25/2022 ATC measured total volatile organic compound (VOC) concentrations using a ppbRAE photoionization detector and vacuum pressures using a digital manometer at nine interior permanent vapor pins (SS-1, SS-3, SS-5 and SS-12 through SS-17). Sub-slab soil-gas samples were collected at two permanent vapor pin locations (SS-1 and SS-3) using 1-liter summa canisters. Depth to groundwater measurements were collected from three groundwater monitoring wells (MW-8, MW-9 and MW-10S). 3/11/2022 ATC supervised replacement of the SSDS radon fan connected to the extraction points located in the Tranzformations tenant space. ATC also replaced the associated vacuum sensor in the telemetry system. 5/19/2022 ATC measured total VOC concentrations using a ppbRAE photoionization detector and vacuum pressures using a digital manometer at nine interior permanent vapor pins (SS-1, SS-3, SS-5 and SS-12 through SS-17). Depth to groundwater measurements were collected from three groundwater monitoring wells (MW-8, MW-9 and MW-10S). 8/16/2022 ATC collected six indoor air samples with 8-hour summa canisters (IA-1, IA-4, IA-5 through IA-8) 8/18/2022 ATC measured VOC concentrations using a ppbRAE photoionization detector and vacuum pressures using a digital manometer at nine interior permanent vapor pins (SS-1, SS-3, SS-5 and SS-12 through SS-17). Sub-slab soil-gas samples were collected at two permanent vapor pin locations (SS-1 and SS-3) using 1-liter summa canisters. Depth to groundwater measurements were collected from three groundwater monitoring wells (MW-8, MW-9 and MW-10S). 11/17/2022 ATC measured total VOC concentrations using a ppbRAE photoionization detector and vacuum pressures using a digital manometer at nine interior permanent vapor pins (SS-1, SS-3, SS-5 and SS-12 through SS-17). Depth to groundwater measurements were collected from three groundwater monitoring wells (MW-8, MW-9 and MW-10S). 2/21/2023 ATC collected four indoor air samples with 8-hour summa canisters (IA-1, IA-4, IA-5 and IA-8) Page 2 of 3 Table 1: Site Chronology DSCA ID No.: DC760001 Chronology of Events 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. Date ADT 1 2/22/2023 ATC measured total VOC concentrations using a ppbRAE photoionization detector and vacuum pressures using a digital manometer at nine interior permanent vapor pins (SS-1, SS-3, SS-5 and SS-12 through SS-17). A sub-slab soil-gas sample was collected at one permanent vapor pin location (SS-1) using a 1-liter summa canister. It was intended to collect a sub- slab soil-gas sample form SS-3, but the sample could not be collected due to equipment failure. Depth to groundwater measurements were collected from three groundwater monitoring wells (MW-8, MW-9 and MW-10S). 5/25/2023 ATC measured total VOC concentrations using a ppbRAE photoionization detector and vacuum pressures using a digital manometer at nine interior permanent vapor pins (SS-1, SS-3, SS-5 and SS-12 through SS-17). Depth to groundwater measurements were collected from three groundwater monitoring wells (MW-8, MW-9 and MW-10S). 6/30/2023 ATC submitted an Indoor Air Sampling and Mitigation System Operation and Maintenance Report documenting activities performed in 2022. 7/18/2023 ATC mobilized to the site to inspect railroad drainage ditches for water flow and potential sampling locations. 8/16/2023 ATC collected four indoor air samples with 8-hour summa canisters (IA-1, IA-4, IA-5 and IA-8) 8/17/2023 ATC measured VOC concentrations using a ppbRAE photoionization detector and vacuum pressures using a digital manometer at nine interior permanent vapor pins (SS-1, SS-3, SS-5 and SS-12 through SS-17). Sub-slab soil-gas samples were collected at two permanent vapor pin locations (SS-1 and SS-14) using 1-liter summa canisters. Depth to groundwater measurements were collected from three groundwater monitoring wells (MW-8, MW-9 and MW-10S). 11/29-30/2023 ATC measured total VOC concentrations using a ppbRAE photoionization detector and vacuum pressures using a digital manometer at nine interior permanent vapor pins (SS-1, SS-3, SS-5 and SS-12 through SS-17). Depth to groundwater measurements and groundwater samples were collected from seven groundwater monitoring wells (MW-5, MW-6, MW-7, MW-8, MW-9, MW-10S, and MW-10D). 2/28/2024 ATC collected four indoor air samples with 8-hour summa canisters (IA-1, IA-4, IA-5 and IA-8) 2/29/2024 ATC measured VOC concentrations using a ppbRAE photoionization detector and vacuum pressures using a digital manometer at nine interior permanent vapor pins (SS-1, SS-3, SS-5 and SS-12 through SS-17). Sub-slab soil-gas samples were collected at two permanent vapor pin locations (SS-1 and SS-14) using 1-liter summa canisters. Depth to groundwater measurements were collected from three groundwater monitoring wells (MW-8, MW-9 and MW-10S). 3/8/2024 ATC submitted an Indoor Air Sampling and Mitigation System Operation and Maintenance Report documenting activities performed in 2023. Page 3 of 3 Table 2: Analytical Data for Soil DSCA ID No.: DC760001 Be n z e n e ci s - 1 , 2 - D i c h l o r o e t h y l e n e Et h y l b e n z e n e Me t h y l t e r t - b u t y l e t h e r (M T B E ) Na p h t h a l e n e Te t r a c h l o r o e t h y l e n e To l u e n e tr a n s - 1 , 2 - D i c h l o r o e t h y l e n e Tr i c h l o r o e t h y l e n e Vi n y l c h l o r i d e Xy l e n e s ( t o t a l ) 0.01 0.41 6.1 0.09 0.39 0.0063 8.3 0.62 0.021 0.00021 9.9 SB-1 1 04/12/17 <0.00084 <0.00096 <0.00096 <0.0011 <0.00084 11 <0.00096 <0.0011 <0.0012 <0.0013 <0.00284 SB-1 4 04/12/17 <53 <65 <57 <40 <53 36,000 <75 <66 <88 <58 <167 SB-2 1 04/12/17 <0.00089 <0.0010 <0.0010 <0.0011 <0.00089 0.028 <0.0010 <0.0011 <0.0013 <0.0014 <0.00309 SB-2 6***04/12/17 <0.00067 0.0023 <0.00076 <0.00086 <0.00067 0.12 <0.00076 <0.00086 0.0024 <0.0010 <0.00227 SB-3 3 04/12/17 <0.00078 <0.00089 <0.00089 <0.0010 <0.00078 0.0043 <0.00089 <0.0010 <0.0011 <0.0012 <0.00268 SB-3 5***04/12/17 <0.021 0.26 <0.023 <0.016 <0.021 4.5 <0.030 <0.026 0.14J <0.023 <0.068 SB-4 1 04/12/17 <0.00074 <0.00085 <0.00085 <0.00095 <0.00074 0.0019J <0.00085 <0.00095 <0.0011 <0.0012 <0.00254 SB-4 6***04/12/17 <0.00071 <0.00082 <0.00082 <0.00092 <0.00071 <0.0013 <0.00082 <0.00092 <0.0010 <0.0011 <0.00241 SB-5 1 04/12/17 <0.00080 <0.00091 <0.00091 <0.0010 <0.00080 <0.0015 <0.00091 <0.0010 <0.0011 <0.0013 <0.0027 SB-5 6***04/12/17 <0.00077 <0.00088 <0.00088 <0.00099 <0.00077 <0.0014 <0.00088 <0.00099 <0.0011 <0.0012 <0.00267 SB-6 2 04/12/17 <0.00073 <0.00084 <0.00084 <0.00094 <0.00073 0.0015J <0.00084 <0.00094 <0.0010 <0.0011 <0.00253 SB-6 6***04/12/17 <0.00094 <0.0011 <0.0011 <0.0012 <0.00094 <0.0017 <0.0011 <0.0012 <0.0013 <0.0015 <0.00324 SB-7 1 04/26/17 <0.00077 <0.00088 <0.00088 <0.0010 <0.00077 0.059 <0.00088 <0.0010 <0.0011 <0.0012 <0.00267 SB-7 3 04/26/17 <0.00074 <0.00085 <0.00085 <0.00096 <0.00074 0.061 <0.00085 <0.00096 <0.0011 <0.0012 <0.00254 SB-8 1 04/26/17 <0.00070 <0.00080 <0.00080 <0.00090 <0.00070 0.036 <0.00080 <0.00090 <0.0010 <0.0011 <0.0024 SB-8 3 04/26/17 <0.00087 <0.00099 <0.00099 <0.0011 <0.00087 0.01 <0.00099 <0.0011 <0.0012 <0.0014 <0.00297 SB-9 1 03/21/18 <0.0023 <0.0023 <0.0023 <0.0045 <0.0045 0.089 <0.0023 <0.0023 <0.0023 <0.011 <0.0068 SB-9 3 03/21/18 <0.0024 <0.0024 <0.0024 <0.0048 <0.0048 0.39 <0.0024 <0.0024 <0.0024 <0.012 <0.0072 SB-10 1 03/21/18 <0.0022 <0.0022 <0.0022 <0.0044 <0.0044 <0.0022 <0.0022 <0.0022 <0.0022 <0.011 <0.0066 SB-10 3 03/21/18 <0.0025 <0.0025 <0.0025 <0.0050 <0.0050 <0.0025 <0.0025 <0.0025 <0.0025 <0.012 <0.0075 NCDEQ PSRG (Feb. 2024) Sa m p l e I D Sa m p l i n g D a t e ( m m / d d / y y ) De p t h [f e e t b g s ] [mg/kg] ADT 2 Page 1 of 4 Table 2: Analytical Data for Soil DSCA ID No.: DC760001 Be n z e n e ci s - 1 , 2 - D i c h l o r o e t h y l e n e Et h y l b e n z e n e Me t h y l t e r t - b u t y l e t h e r (M T B E ) Na p h t h a l e n e Te t r a c h l o r o e t h y l e n e To l u e n e tr a n s - 1 , 2 - D i c h l o r o e t h y l e n e Tr i c h l o r o e t h y l e n e Vi n y l c h l o r i d e Xy l e n e s ( t o t a l ) 0.01 0.41 6.1 0.09 0.39 0.0063 8.3 0.62 0.021 0.00021 9.9NCDEQ PSRG (Feb. 2024) Sa m p l e I D Sa m p l i n g D a t e ( m m / d d / y y ) De p t h [f e e t b g s ] [mg/kg] ADT 2 SB-11 1 03/21/18 <0.0022 <0.0022 <0.0022 <0.0045 <0.0045 0.055 <0.0022 <0.0022 <0.0022 <0.011 <0.0067 SB-11 3 03/21/18 <0.0026 <0.0026 <0.0026 <0.0052 <0.0052 <0.0026 <0.0026 <0.0026 <0.0026 <0.013 <0.0078 SB-12 2 03/21/18 <0.0025 <0.0025 <0.0025 <0.0051 <0.0051 <0.0025 <0.0025 <0.0025 <0.0025 <0.013 <0.0076 SB-12 3 03/21/18 <0.0024 <0.0024 <0.0024 <0.0049 <0.0049 <0.0024 <0.0024 <0.0024 <0.0024 <0.012 <0.0073 SB-13*1 03/27/18 <0.0024 <0.0024 <0.0024 <0.0049 <0.0049 0.037 <0.0024 <0.0024 <0.0024 <0.012 <0.0073 SB-13*7 03/27/18 <0.0026 0.0055 <0.0026 <0.0051 <0.0051 1.2 <0.0026 <0.0026 0.0041 <0.013 <0.0077 SB-14*1 03/27/18 <0.0028 <0.0028 <0.0028 <0.0055 <0.0055 0.017 <0.0028 <0.0028 <0.0028 <0.014 <0.0083 SB-14*7 03/27/18 <0.0027 0.0013J <0.0027 <0.0054 <0.0054 0.092 <0.0027 <0.0027 0.0041 <0.014 <0.0081 SB-15**1 04/01/19 <0.00139 <0.00347 <0.00347 <0.00139 0.00555BJ 0.00377 <0.00695 <0.00695 <0.00139 <0.00347 <0.00903 SB-15**3 04/01/19 <0.00139 <0.00347 <0.00347 <0.00139 <0.0174 0.00105J <0.00694 <0.00694 <0.00139 <0.00347 <0.00903 SB-16**1 04/01/19 <0.00126 <0.00314 <0.00314 <0.00126 <0.0157 <0.00314 <0.00628 <0.00628 <0.00126 <0.00314 <0.00816 SB-16**3 04/01/19 <0.00136 <0.00341 <0.00341 <0.00136 <0.0171 <0.00341 <0.00682 <0.00682 <0.00136 <0.00341 <0.00887 SB-17 5 04/01/19 <0.00140 <0.00350 <0.00350 <0.00140 <0.0175 0.814 <0.00700 <0.00700 0.000705J <0.00350 <0.00910 SB-18 3 04/01/19 <0.00125 0.0634 <0.00312 <0.00125 <0.0156 5.57 <0.00624 <0.00624 0.0440 <0.00312 <0.00811 SB-19 5 04/01/19 <0.00153 <0.00381 <0.00381 <0.00153 <0.0191 2.23 <0.00763 <0.00763 0.00905 <0.00381 <0.00992 5.) NCDEQ PSRG: North Carolina Department of Environmental Quality, Preliminary Soil Remediation Goal (Feb. 2023), lower of the Residential and Protection of Groundwater PSRG used. Concentrations above NCDEQ PSRG are BOLD. 6.) ***: Potentially collected below the seasonal high water table. 4.) J: Estimated concentration between the laboratory method detection and reporting limits. Notes: 2.) *: Borings were located east of a retaining wall, and the ground elevation at the boring locations was approximately four feet higher than the adjacent pavement to the west of the retaining wall. 1.) <X: Below laboratory quantitation limit of X 3.) **: Borings were located east of a retaining wall, and the ground elevation at the boring locations was approximately fifteen feet higher than the adjacent pavement to the west of the retaining wall. Page 2 of 4 Table 2(1): Analytical Data for Soil (User Specified Chemicals) DSCA ID No.: DC760001 Ac e t o n e Ch l o r o f o r m Is o p r o p y l b e n z e n e 2- B u t a n o n e ( M E K ) 1, 2 , 4 - T r i m e t h y l b e n z e n e 1, 3 , 5 - T r i m e t h y l b e n z e n e 25 0.34 2.3 17 12 11 SB-1 1 04/12/17 <0.12 <0.0048 <0.0024 <0.048 <0.0024 <0.0024 SB-1 4 04/12/17 <22,000 <880 <440 <8800 <440 <440 SB-2 1 04/12/17 <0.13 <0.0051 <0.0025 <0.051 <0.0025 <0.0025 SB-2 6**04/12/17 <0.095 <0.0038 <0.0019 <0.038 <0.0019 <0.0019 SB-3 3 04/12/17 <0.11 <0.0045 <0.0022 <0.045 <0.0022 <0.0022 SB-3 5**04/12/17 <8.8 <0.35 <0.18 <3.5 <0.18 <0.18 SB-4 1 04/12/17 <0.11 <0.0042 <0.0021 <0.042 <0.0021 <0.0021 SB-4 6**04/12/17 <0.10 <0.0041 <0.0020 <0.041 <0.0020 <0.0020 SB-5 1 04/12/17 <0.11 <0.0045 <0.0023 <0.045 <0.0023 <0.0023 SB-5 6**04/12/17 <0.11 <0.0044 <0.0022 <0.044 <0.0022 <0.0022 SB-6 2 04/12/17 <0.10 <0.0042 <0.0021 <0.042 <0.0021 <0.0021 SB-6 6**04/12/17 <0.13 <0.0053 <0.0027 <0.053 <0.0027 <0.0027 SB-7 1 04/26/17 <0.11 <0.0044 <0.0022 <0.044 <0.0022 <0.0022 SB-7 3 04/26/17 <0.11 <0.0043 <0.0021 <0.043 <0.0021 <0.0021 SB-8 1 04/26/17 <0.10 <0.0040 <0.0020 <0.040 <0.0020 <0.0020 SB-8 3 04/26/17 <0.12 <0.0050 <0.0025 <0.050 <0.0025 <0.0025 SB-9 1 03/21/18 0.036J <0.0045 <0.0023 <0.045 <0.0023 <0.0023 SB-9 3 03/21/18 <0.12 <0.0048 <0.0024 <0.048 <0.0024 <0.0024 SB-10 1 03/21/18 <0.11 <0.0044 <0.0022 <0.044 <0.0022 <0.0022 SB-10 3 03/21/18 <0.12 <0.0050 <0.0025 <0.050 <0.0025 <0.0025 NCDEQ PSRG (Feb. 2024) [mg/kg]Sa m p l e I D De p t h [f e e t b g s ] Sa m p l i n g D a t e ( m m / d d / y y ) ADT 2(1) Page 3 of 4 Table 2(1): Analytical Data for Soil (User Specified Chemicals) DSCA ID No.: DC760001 Ac e t o n e Ch l o r o f o r m Is o p r o p y l b e n z e n e 2- B u t a n o n e ( M E K ) 1, 2 , 4 - T r i m e t h y l b e n z e n e 1, 3 , 5 - T r i m e t h y l b e n z e n e 25 0.34 2.3 17 12 11NCDEQ PSRG (Feb. 2024) [mg/kg]Sa m p l e I D De p t h [f e e t b g s ] Sa m p l i n g D a t e ( m m / d d / y y ) ADT 2(1) SB-11 1 03/21/18 <0.11 <0.0045 <0.0022 <0.045 <0.0022 <0.0022 SB-11 3 03/21/18 <0.13 <0.0052 <0.0026 <0.052 <0.0026 <0.0026 SB-12 2 03/21/18 <0.13 <0.0051 <0.0025 <0.051 <0.0025 <0.0025 SB-12 3 03/21/18 <0.12 <0.0049 <0.0024 <0.049 <0.0024 <0.0024 SB-13*1 03/27/18 <0.12 <0.0049 <0.0024 <0.049 <0.0024 <0.0024 SB-13*7 03/27/18 <0.13 <0.0051 <0.0026 <0.051 <0.0026 <0.0026 SB-14*1 03/27/18 <0.14 <0.0055 <0.0028 <0.055 <0.0028 <0.0028 SB-14*7 03/27/18 <0.14 <0.0054 <0.0027 <0.054 <0.0027 <0.0027 SB-15 1 04/01/19 <0.0347 <0.00347 <0.00347 <0.00347 0.00652J 0.00170J SB-15 3 04/01/19 <0.0347 0.00102J 0.00131J 0.0211J 0.00328J <0.00694 SB-16 1 04/01/19 <0.0314 <0.00314 <0.00314 0.0190J 0.00251J <0.00628 SB-16 3 04/01/19 <0.0341 <0.00341 <0.00341 <0.00341 <0.00682 <0.00682 SB-17 5 04/01/19 <0.0350 <0.00350 <0.00350 <0.00350 <0.00700 <0.00700 SB-18 3 04/01/19 0.0225J <0.00312 <0.00312 <0.00312 <0.00624 <0.00624 SB-19 5 04/01/19 0.0234J <0.00381 <0.00381 <0.00381 <0.00763 <0.00763 Notes: 1.) <X: Below laboratory quantitation limit of X 2.) *: Borings were located east of a retaining wall, and the ground elevation at the boring locations was approximately four feet higher than the adjacent pavement to the west of the retaining wall. 4.) J: Estimated concentration between the laboratory method detection and reporting limits. 5.) NCDEQ PSRG: North Carolina Department of Environmental Quality, Preliminary Soil Remediation Goal (Feb. 2024), lower of the Residential and Protection of Groundwater PSRG used. Concentrations above NCDEQ PSRG are BOLD. 6.) ***: Potentially collected below the water table. 3.) **: Borings were located east of a retaining wall, and the ground elevation at the boring locations was approximately fifteen feet higher than the adjacent pavement to the west of the retaining wall. Page 4 of 4 Table 3: Analytical Data for Sub-slab Gas DSCA ID No.: DC760001 Be n z e n e ci s - 1 , 2 - D i c h l o r o e t h y l e n e Et h y l b e n z e n e Me t h y l t e r t - b u t y l e t h e r (M T B E ) Na p h t h a l e n e Te t r a c h l o r o e t h y l e n e To l u e n e tr a n s - 1 , 2 - D i c h l o r o e t h y l e n e Tr i c h l o r o e t h y l e n e Vi n y l c h l o r i d e Xy l e n e s ( t o t a l ) 160 3,500 490 4,700 36 3,500 440,000 3,500 180 280 8,800 G 04/26/17 NA <320 NA NA NA 960,000 NA <320 870 <200 NA G 02/25/22*NA <200 NA NA NA 67,000 NA <200 <270 <130 NA G 08/18/22*NA <120 NA NA NA 46,000 NA <120 <160 <76 NA G 02/22/23*NA 1.16 NA NA NA 75,411 NA <0.369 22.3 <0.223 NA G 08/17/23*NA <3.7 NA NA NA 680 NA <3.7 <5.1 <2.4 NA G 04/26/17 NA 770 NA NA NA 970,000 NA <320 9,700 <200 NA G 03/25/18 NA 700 NA NA NA 380,000 NA <500 7,900 <50 NA HVS-4 0 6 G 03/25/18 NA <14.3 NA NA NA 4,462 NA <14.4 <19.8 <8.96 NA G 06/01/17 NA <500 NA NA NA 890,000 NA <500 2,500 <50 NA G 04/26/21*NA <37 NA NA NA 14,000 NA <37 <50 <24 NA G 02/25/22*NA <23 NA NA NA 8,900 NA <23 <32 <15 NA G 08/18/22*NA <17 NA NA NA 8,100 NA <17 <23 <11 NA SS-4 4 4 G 06/01/17 NA <4.0 NA NA NA 280 NA <8.0 <5.5 <2.6 NA SS-5 6 6 G 06/01/17 NA <20 NA NA NA 16,000 NA <40 91 <13 NA SS-6 6 6 G 03/21/18 NA 14,000 NA NA NA 12,000,000 NA <500 270,000 <50 NA HVS-1 0 6 G 03/25/18 NA 26.3J NA NA NA 54,667 NA <29.6 189 <18.4 NA SS-7 6 6 G 03/21/18 NA <10,000 NA NA NA 380,000 NA <10,000 3,400 <1,000 NA HVS-2 0 6 G 03/25/18 NA 42.9 NA NA NA 32,505 NA <29.1 268 <18.0 NA SS-8 6 6 G 03/23/18 NA <10,000 NA NA NA 8,600,000 NA <10,000 2,300 <1,000 NA HVS-3 0 6 G 03/25/18 NA <28.7 NA NA NA 19,814 NA <28.9 <39.6 <17.9 NA SS-11 6 6 G 03/23/18 NA <20 NA NA NA 7,400 NA <40 180 <13 NA SS-1 SS-3 SS-2 4 4 66 44 Sa m p l e I D Sa m p l i n g D a t e ( m m / d d / y y ) De p t h [i n c h e s b g s ] Sl a b T h i c k n e s s [i n c h e s ] Sa m p l i n g D u r a t i o n 1 NCDEQ Non-Residential VISL (Feb. 2024) [µg/m3] ADT 3 Page 1 of 2 Table 3: Analytical Data for Sub-slab Gas DSCA ID No.: DC760001 Be n z e n e ci s - 1 , 2 - D i c h l o r o e t h y l e n e Et h y l b e n z e n e Me t h y l t e r t - b u t y l e t h e r (M T B E ) Na p h t h a l e n e Te t r a c h l o r o e t h y l e n e To l u e n e tr a n s - 1 , 2 - D i c h l o r o e t h y l e n e Tr i c h l o r o e t h y l e n e Vi n y l c h l o r i d e Xy l e n e s ( t o t a l ) 160 3,500 490 4,700 36 3,500 440,000 3,500 180 280 8,800 Sa m p l e I D Sa m p l i n g D a t e ( m m / d d / y y ) De p t h [i n c h e s b g s ] Sl a b T h i c k n e s s [i n c h e s ] Sa m p l i n g D u r a t i o n 1 NCDEQ Non-Residential VISL (Feb. 2024) [µg/m3] ADT 3 HVS-5 0 6 G 03/25/18 NA 16.7 NA NA NA 2,800 NA <2.96 59 <1.84 NA SS-14 4 4 G 08/17/23*NA <37 NA NA NA 14,000 NA <37 <51 <24 NA SS-16 6 6 G 04/26/21*NA <75 NA NA NA 28,000 NA <75 250 <48 NA 1 Indicate "G" for grab sample or for longer samples indicate the number of hours followed by "h". 2 NA = Not Applicable NCDEQ Non-Residential VISL: North Carolina Department of Environmental Quality, Non-residential Vapor Intrusion Screening Levels for Sub-slab and Exterior Soil Gas (Feb. 2024) *Sample collected while sub-slab depressurization system was active. SS-6 was installed, sampled, and abandoned in the location of HVS-1 prior to extraction point installation. SS-7 was installed, sampled, and abandoned in the location of HVS-2 prior to extraction point installation. SS-8 was installed, sampled, and abandoned in the location of HVS-3 prior to extraction point installation. SS-2 was sampled on 3/25/2018 and abandoned in the location of HVS-4 prior to extraction point installation SS-11 was installed, sampled, and abandoned in the location of HVS-5 prior to extraction point installation. Page 2 of 2 Table 4: Analytical Data for Soil Gas DSCA ID No.: DC760001 Be n z e n e ci s - 1 , 2 - D i c h l o r o e t h y l e n e Et h y l b e n z e n e Me t h y l t e r t - b u t y l e t h e r (M T B E ) Na p h t h a l e n e Te t r a c h l o r o e t h y l e n e To l u e n e tr a n s - 1 , 2 - D i c h l o r o e t h y l e n e Tr i c h l o r o e t h y l e n e Vi n y l c h l o r i d e Xy l e n e s ( t o t a l ) 12 280 37 360 2.8 280 35,000 280 14 5.6 700 0.5 G 03/23/18 NA <8.0 NA NA NA 1,000 NA <16 11 <5.2 NA 0.5 G 04/26/21 NA 8.3 NA NA NA 830 NA <3.9 14 <2.5 NA 0.5 G 03/23/18 NA <4.0 NA NA NA 200 NA <8.0 <5.5 <2.6 NA 0.5 G 04/26/21 NA <3.8 NA NA NA 250 NA <3.8 <5.1 <2.4 NA SGMP-1 10 G 04/01/19 NA <4.0 NA NA NA 48 NA <8.0 <5.5 <2.6 NA SGMP-2 10 G 04/01/19 NA <4.0 NA NA NA 81 NA <8.0 <5.5 <2.6 NA SGMP-3 10 G 04/01/19 NA <4.0 NA NA NA 310 NA <8.0 <5.5 <2.6 NA NCDEQ Residential VISL = North Carolina Department of Environmental Quality Residential Vapor Intrusion Screening Levels for Sub-slab and exterior soil gas (Feb. 2024) <X: Below laboratory quantitation limit of X NA = Not Analyzed NE= Not Established Sa m p l e D u r a t i o n 1 1 Indicate "G" for grab sample or for longer samples indicate the number of hours followed by "h" Sa m p l e I D Sa m p l i n g D a t e ( m m / d d / y y ) De p t h [f e e t b g s ] [µg/m3] NCDEQ Residential VISL (Feb. 2024) SS-9 SS-10 ADT 4 Page 1 of 1 Table 5: Analytical Data for Indoor and Outdoor Air DSCA ID No.: DC760001 Be n z e n e ci s - 1 , 2 - D i c h l o r o e t h y l e n e Et h y l b e n z e n e Me t h y l t e r t - b u t y l e t h e r (M T B E ) Na p h t h a l e n e Te t r a c h l o r o e t h y l e n e To l u e n e tr a n s - 1 , 2 - D i c h l o r o e t h y l e n e Tr i c h l o r o e t h y l e n e Vi n y l c h l o r i d e Xy l e n e s ( t o t a l ) 1.6 35 4.9 47 0.36 35 4,400 35 1.8 2.8 88 4/25/2017 F SU 8h NA <0.269 NA NA NA 381 NA 0.248J 0.659 <0.169 NA 5/31/2017 F SU 8h NA <0.163 NA NA NA 67.7 NA <0.164 <0.225 <0.102 NA 6/6/2018*F SU 8h NA <0.281 NA NA NA 19 NA <0.284 <0.388 <0.176 NA 2/13/2019*F SU 8h NA 0.535 NA NA NA 33 NA <0.187 0.288 <0.119 NA 8/21/2019*F SU 8h NA <0.185 NA NA NA 4.34 NA <0.188 <0.250 <0.119 NA 2/19/2020*F SU 8h NA <0.186 NA NA NA 45.6 NA <0.188 0.824 <0.120 NA 8/14/2020*F SU 8h NA <0.0793 NA NA NA 6.52 NA 0.176 <0.107 <0.0511 NA 2/8/2021*F SU 8h NA 1.82 NA NA NA 80.1 NA <0.0793 1.11 <0.0511 NA 8/11/2021*F SU 8h NA <0.12 NA NA NA 15 NA <0.59 <0.16 <0.038 NA 2/24/2022*F SU 8h NA 0.26 NA NA NA 74 NA <0.59 1.6 <0.038 NA 8/16/2022*F SU 8h NA <0.12 NA NA NA 10 NA <0.60 <0.16 <0.038 NA 2/21/2023*F SU 8h NA <0.190 NA NA NA 29.2 NA <0.192 0.403 <0.121 NA 8/16/2023*F SU 8h NA <0.11 NA NA NA 18 NA <0.57 <0.16 <0.037 NA 4/25/2017 F SU 8h NA <0.268 NA NA NA 866 NA 0.244J 0.594 <0.168 NA 5/31/2017 F SU 8h NA <0.173 NA NA NA 114 NA <0.174 0.224J <0.108 NA 6/6/2018*F SU 8h NA <0.282 NA NA NA 19.6 NA <0.285 <0.39 <0.177 NA 2/13/2019*F SU 8h NA 0.412 NA NA NA 18.5 NA <0.186 0.240J <0.118 NA 8/21/2019*F SU 8h NA <0.184 NA NA NA 9.16 NA <0.186 <0.249 <0.118 NA 2/19/2020*F SU 8h NA 0.291m NA NA NA 25.7 NA <0.186 0.394 0.979 NA 8/14/2020*F SU 8h NA <0.0793 NA NA NA 8.62 NA 0.179 <0.107 <0.0511 NA 2/8/2021*F SU 8h NA 1.35 NA NA NA 46.6 NA <0.0793 3.25 <0.0511 NA 8/11/2021*F SU 8h NA <0.12 NA NA NA 17 NA <0.59 0.26 <0.038 NA [µg/m3]Sa m p l e L o c a t i o n 1 Sa m p l i n g D u r a t i o n 3 Sa m p l i n g M e t h o d 2 NCDEQ Non-Residential VISL (Feb. 2024) Sa m p l e I D Sa m p l i n g D a t e ( m m / d d / y y ) IA-2 IA-1 ADT 5(1) Page 1 of 6 Table 5: Analytical Data for Indoor and Outdoor Air DSCA ID No.: DC760001 Be n z e n e ci s - 1 , 2 - D i c h l o r o e t h y l e n e Et h y l b e n z e n e Me t h y l t e r t - b u t y l e t h e r (M T B E ) Na p h t h a l e n e Te t r a c h l o r o e t h y l e n e To l u e n e tr a n s - 1 , 2 - D i c h l o r o e t h y l e n e Tr i c h l o r o e t h y l e n e Vi n y l c h l o r i d e Xy l e n e s ( t o t a l ) 1.6 35 4.9 47 0.36 35 4,400 35 1.8 2.8 88 [µg/m3]Sa m p l e L o c a t i o n 1 Sa m p l i n g D u r a t i o n 3 Sa m p l i n g M e t h o d 2 NCDEQ Non-Residential VISL (Feb. 2024) Sa m p l e I D Sa m p l i n g D a t e ( m m / d d / y y ) ADT 5(1) 4/25/2017 AD SU 8h NA <0.277 NA NA NA 237 NA 0.462 1.38 <0.173 NA 5/31/2017 AD SU 8h NA <0.200 NA NA NA 43.4 NA <0.202 0.345 <0.125 NA 6/6/2018*AD SU 8h NA <0.277 NA NA NA 37.7 NA <0.28 0.887 <0.173 NA 2/13/2019*AD SU 8h NA <0.187 NA NA NA 9.28 NA <0.189 0.309 <0.120 NA 8/21/2019*AD SU 8h NA <0.185 NA NA NA 6.11 NA <0.187 <0.250 <0.119 NA 2/19/2020*AD SU 8h NA 0.534m NA NA NA 14.8 NA <0.186 0.407 <0.118 NA 8/14/2020*AD SU 8h NA <0.0793 NA NA NA 25.4 NA 0.563 0.814 <0.0511 NA 2/8/2021*AD SU 8h NA 0.448 NA NA NA 15.5 NA 0.0919 0.444 <0.0511 NA 8/11/2021*AD SU 8h NA <0.11 NA NA NA 4.5 NA <0.55 <0.15 <0.035 NA 5/31/2017 F SU 8h NA <0.185 NA NA NA 60.5 NA <0.187 <0.256 <0.116 NA 6/6/2018*F SU 8h NA <0.279 NA NA NA 17.9 NA <0.281 <0.385 <0.174 NA 2/13/2019*F SU 8h NA 1.26 NA NA NA 42.8 NA <0.187 0.657 <0.119 NA 8/21/2019*F SU 8h NA <0.184 NA NA NA 7.21 NA <0.186 <0.248 <0.118 NA 2/19/2020*F SU 8h NA 0.564m NA NA NA 35.9 NA <0.185 0.778 <0.118 NA 8/14/2020*F SU 8h NA <0.0793 NA NA NA 7.26 NA 0.248 <0.107 <0.0511 NA 2/8/2021*F SU 8h NA 4.48 NA NA NA 132 NA <0.0793 2.49 <0.0511 NA 3/17/2021*F SU 8h NA 10.2 NA NA NA 633 NA 0.192m 7.01 0.174 NA 4/19/2021*F SU 8h NA 3.74 NA NA NA 95.8 NA 0.46 3.1 0.146 NA 4/19/2021*F P 7d NA 5.54C NA NA NA 79.6 NA 0.181mC 2.58 <0.0806 NA 8/11/2021*F P 7d NA <0.12 NA NA NA 11 NA <0.58 <0.16 <0.037 NA 2/24/2022*F SU 8h NA 0.26 NA NA NA 50 NA <0.58 0.61 <0.037 NA 8/16/2022*F SU 8h NA <0.14 NA NA NA 9.6 NA <0.71 <0.19 <0.046 NA 2/21/2023*F SU 8h NA <0.188 NA NA NA 18.4 NA <0.190 0.308 <0.120 NA 8/16/2023*F SU 8h NA <0.11 NA NA NA 16 NA <0.56 <0.15 <0.036 NA IA-3 IA-4 Page 2 of 6 Table 5: Analytical Data for Indoor and Outdoor Air DSCA ID No.: DC760001 Be n z e n e ci s - 1 , 2 - D i c h l o r o e t h y l e n e Et h y l b e n z e n e Me t h y l t e r t - b u t y l e t h e r (M T B E ) Na p h t h a l e n e Te t r a c h l o r o e t h y l e n e To l u e n e tr a n s - 1 , 2 - D i c h l o r o e t h y l e n e Tr i c h l o r o e t h y l e n e Vi n y l c h l o r i d e Xy l e n e s ( t o t a l ) 1.6 35 4.9 47 0.36 35 4,400 35 1.8 2.8 88 [µg/m3]Sa m p l e L o c a t i o n 1 Sa m p l i n g D u r a t i o n 3 Sa m p l i n g M e t h o d 2 NCDEQ Non-Residential VISL (Feb. 2024) Sa m p l e I D Sa m p l i n g D a t e ( m m / d d / y y ) ADT 5(1) 5/31/2017 F SU 8h NA <0.184 NA NA NA 67.0 NA <0.185 <0.254 <0.115 NA 6/6/2018*F SU 8h NA <0.289 NA NA NA 20.8 NA <0.292 <0.4 <0.181 NA 3/17/2021*F SU 8h NA 7.57m NA NA NA 508 NA 0.170J 4.59 0.150 NA 2/24/2022*F SU 8h NA 0.20 NA NA NA 53 NA <0.58 0.75 <0.037 NA 8/16/2022*F SU 8h NA <0.12 NA NA NA 12 NA <0.59 <0.16 <0.038 NA 2/21/2023*F SU 8h NA <0.188 NA NA NA 21.9 NA <0.190 0.311 <0.120 NA 8/16/2023*F SU 8h NA <0.11 NA NA NA 18 NA <0.54 <0.15 <0.035 NA 5/31/2017 AD SU 8h NA <0.192 NA NA NA 116 NA <0.194 0.618 <0.120 NA 6/6/2018*AD SU 8h NA <0.284 NA NA NA 9.14 NA <0.287 <0.393 <0.178 NA 2/13/2019*AD SU 8h NA <0.185 NA NA NA 4.16 NA <0.187 <0.250 <0.119 NA 8/21/2019*AD SU 8h NA <0.182 NA NA NA 5.46 NA <0.185 <0.246 <0.117 NA 2/19/2020*AD SU 8h NA <0.186 NA NA NA 6.07 NA 0.232 <0.251 <0.120 NA 8/14/2020*AD SU 8h NA <0.0793 NA NA NA 5.11 NA 0.741 <0.107 <0.0511 NA 2/8/2021*AD SU 8h NA 0.797 NA NA NA 23.7 NA 0.216 2.84 <0.0511 NA 8/11/2021*AD SU 8h NA <0.12 NA NA NA 4.9 NA <0.59 <0.16 <0.038 NA 2/24/2022*AD SU 8h NA <0.11 NA NA NA 8.7 NA <0.57 <0.15 <0.036 NA 8/16/2022*AD SU 8h NA <0.12 NA NA NA 0.90 NA <0.59 <0.16 <0.038 NA 6/6/2018*AD SU 8h NA <0.27 NA NA NA 36.9 NA <0.272 0.822 <0.169 NA 2/13/2019*AD SU 8h NA <0.185 NA NA NA 9.07 NA <0.188 0.331 <0.119 NA 8/21/2019*AD SU 8h NA <0.185 NA NA NA 5.65 NA <0.187 <0.249 <0.119 NA 2/24/2022*AD SU 8h NA <0.24 NA NA NA 8.1 NA <1.2 <0.32 <0.076 NA 8/16/2022*AD SU 8h NA <0.12 NA NA NA 0.76 NA <0.58 0.31 <0.037 NA 3/17/2021*F SU 8h NA 7.57 NA NA NA 501 NA 0.207m 4.52 0.147 NA 2/24/2022*F SU 8h NA 0.22 NA NA NA 60 NA <0.64 1.0 <0.041 NA 8/16/2022*F SU 8h NA <0.11 NA NA NA 10 NA <0.56 <0.15 <0.036 NA 2/21/2023*F SU 8h NA <0.195 NA NA NA 18.0m NA <0.197 0.262J <0.124 NA 8/16/2023*F SU 8h NA <0.11 NA NA NA 18 NA <0.57 <0.16 <0.037 NA IA-5 IA-8 IA-7 IA-6 Page 3 of 6 Table 5: Analytical Data for Indoor and Outdoor Air DSCA ID No.: DC760001 Be n z e n e ci s - 1 , 2 - D i c h l o r o e t h y l e n e Et h y l b e n z e n e Me t h y l t e r t - b u t y l e t h e r (M T B E ) Na p h t h a l e n e Te t r a c h l o r o e t h y l e n e To l u e n e tr a n s - 1 , 2 - D i c h l o r o e t h y l e n e Tr i c h l o r o e t h y l e n e Vi n y l c h l o r i d e Xy l e n e s ( t o t a l ) 1.6 35 4.9 47 0.36 35 4,400 35 1.8 2.8 88 [µg/m3]Sa m p l e L o c a t i o n 1 Sa m p l i n g D u r a t i o n 3 Sa m p l i n g M e t h o d 2 NCDEQ Non-Residential VISL (Feb. 2024) Sa m p l e I D Sa m p l i n g D a t e ( m m / d d / y y ) ADT 5(1) IA-9 5/3/2021*AD SU 8h NA <0.193 NA NA NA 9.53 NA <0.194 0.261 <0.123 NA IA-10 5/3/2021*AD SU 8h NA <0.187 NA NA NA 9.42 NA <0.189 <0.254 <0.119 NA Notes: 1 Indicate "F" for former or current dry-cleaning facility, "AD" for adjacent space, "R" for residence, "C" for commercial not adjacent space. If sample was taken outdoors, leave blank. 2 Indicate "SU" for summa canister, "FC" for flux chambers, "T" for tedlar bags, "P" for passive samplers, "O" for other. 3 Indicate "8h" for 8-hour, "24h" for 24-hour, "G" for grab sample, for other hours indicate the number of hours followed by "h" or "d" for days. NCDEQ Non-Residential VISL = North Carolina Department of Environmental Quality Non-Residential Vapor Intrusion Screening Level for Indoor Air (Feb. 2024) *Sample collected while sub-slab depressurization system was active. m = Manual integration. C = Estimated flow rate J = Estimated concentration between the method detection limit and quantitation limit. Page 4 of 6 Table 5(2): Additional Data for Indoor and Outdoor Air DSCA ID No.: DC760001 Is dry-cleaning facility at the site: Operating Pick-up Only Abandoned If facility is operating, solvents used are: Perc Petroleum Green Earth Other For the active or former dry-cleaning space, describe the type and location of the air handling/HVAC unit (for example - a shared unit supplying two adjacent spaces; unit located on the roof): Studio J Dance Center has an individual roof mounted HVAC unit. For any other indoor spaces tested, describe the type and location of the air handling/HVAC unit (for example - a shared unit supplying two adjacent spaces; unit located on the roof): Tranzformations (formerly Taxes Etc. Inc.) has an individual roof mounted HVAC unit. Trogdon Bail Bonds (formerly Hillside Barber Shop) has an individual roof-mounted HVAC unit. Taste of Asia has an individual roof-mounted HVAC unit. For any indoor air spaces tested, describe the current use of the space (for example - an ABC liquor store adjacent to the dry-cleaner, a residence approximately 200 feet from the dry-cleaner, etc.): IA-1 is located in the middle of the main dance room in Studio J Dance Center. The main dance room is directly where the abandoned dry-cleaner used to be. IA-2 is located in the storage closet directly adjacent to the main dance room. IA-4 is located on the east side of the second dance room in Studio J Dance Center. IA-5 is located in the office space for the dance studio. IA-8 was located in the hallway between the two dance rooms. IA-3 and IA-7 are located in Tranzformations (formerly Taxes Etc. Inc.), which is directly adjacent to Studio J Dance Center in the Hillside Shopping Center strip mall. IA-6 is located in Trogdon Bail Bonds (formerly Hillside Barber Shop), which is directly adjacent to Studio J Dance Center in the Hillside Shopping Center strip mall. IA-9 and IA-10 are located in the Taste of Asia, a restaurant, which is located directly adjacent to Studio J. Dance Center in the Hillside Shopping Center strip mall. ADT 5(2) Page 5 of 6 Table 5(3): Additional Data for Indoor and Outdoor Air DSCA ID No.: DC760001 Sample ID Name and Address for Sampling Location Property Owner Name, Address, and Phone Number Tenant Name, Address, and Phone Number Taste of Asia 127 East Taft Ave., Asheboro, NC 27203 (336) 626-7578 IA-10 Taste of Asia 127 East Taft Ave. Asheboro, NC 27203 Hillside Shopping Center, LLC Attn: Scott Soule, 1013 South Fayetteville Street, Asheboro, NC 27203 (336) 302-1775 Taste of Asia 127 East Taft Ave., Asheboro, NC 27203 (336) 626-7578 Laura Thornburg 129 East Taft Ave., Asheboro, NC 27203 (336) 302-1072 Laura Thornburg 129 East Taft Ave., Asheboro, NC 27203 (336) 302-1072 IA-1 Studio J Dance Center 129 East Taft Ave. Asheboro, NC 27203 Hillside Shopping Center, LLC Attn: Scott Soule, 1013 South Fayetteville Street, Asheboro, NC 27203 (336) 302-1775 Laura Thornburg 129 East Taft Ave., Asheboro, NC 27203 (336) 302-1072 IA-3 Tranzformations (formerly Taxes Etc. Inc.) 133 East Taft Ave. Asheboro NC 27203 Hillside Shopping Center, LLC Attn: Scott Soule, 1013 South Fayetteville Street, Asheboro, NC 27203 (336) 302-1775 Stephanie Johnson 133 East Taft Ave., Asheboro NC 27203 (336) 736-9428 IA-4 Studio J Dance Center 129 East Taft Ave. Asheboro, NC 27203 Hillside Shopping Center, LLC Attn: Scott Soule, 1013 South Fayetteville Street, Asheboro, NC 27203 (336) 302-1775 Laura Thornburg 129 East Taft Ave., Asheboro, NC 27203 (336) 302-1072 IA-2 Studio J Dance Center 129 East Taft Ave. Asheboro, NC 27203 Hillside Shopping Center, LLC Attn: Scott Soule, 1013 South Fayetteville Street, Asheboro, NC 27203 (336) 302-1775 Laura Thornburg 129 East Taft Ave., Asheboro, NC 27203 (336) 302-1072 IA-6 Dexter Trogdon 131 East Taft Ave., Asheboro, NC 27203 (336) 633-1000 IA-7 Tranzformations (formerly Taxes Etc. Inc.) 133 East Taft Ave. Asheboro NC 27203 Hillside Shopping Center, LLC Attn: Scott Soule, 1013 South Fayetteville Street, Asheboro, NC 27203 (336) 302-1775 Stephanie Johnson 133 East Taft Ave., Asheboro NC 27203 (336) 736-9428 IA-5 Studio J Dance Center 129 East Taft Ave. Asheboro, NC 27203 Hillside Shopping Center, LLC Attn: Scott Soule, 1013 South Fayetteville Street, Asheboro, NC 27203 (336) 302-1775 IA-8 Studio J Dance Center 129 East Taft Ave. Asheboro, NC 27203 Trogdon Bail Bonds (formerly Hillside Barber Shop) 131 East Taft Ave. Asheboro, NC 27203 Hillside Shopping Center, LLC Attn: Scott Soule, 1013 South Fayetteville Street, Asheboro, NC 27203 (336) 302-1775 Hillside Shopping Center, LLC Attn: Scott Soule, 1013 South Fayetteville Street, Asheboro, NC 27203 (336) 302-1775 IA-9 Taste of Asia 127 East Taft Ave. Asheboro, NC 27203 Hillside Shopping Center, LLC Attn: Scott Soule, 1013 South Fayetteville Street, Asheboro, NC 27203 (336) 302-1775 ADT 5(3) Page 6 of 6 Table 6: Monitoring Well Construction Data DSCA ID No.: DC760001 Well ID Date Installed (mm/dd/yy)Number of Samples Well Depth [feet] Well Diameter [inch] Screen Interval [feet] Status (Active/Inactive) MW-5 04/10/17 3 20 2 5-20 Active MW-6 04/10/17 3 21 2 6-21 Active MW-7 04/11/17 3 15 2 5-15 Active MW-8 04/11/17 3 20 2 5-20 Active MW-9 04/11/17 3 20 2 5-20 Active MW-10S 03/27/18 3 19 2 4-19 Active MW-10D 03/27/18 3 65 2 60-65 Active Note: Well identification numbers MW-1 through MW-4 were previously used at the site for temporary monitoring wells installed and sampled in 1998. ADT 6 Page 1 of 1 Table 7: Groundwater Elevation Data DSCA ID No.: DC760001 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] 04/24/17 4.12 84.00 NA NA NA 03/29/18 4.18 83.94 NA NA NA 11/30/20 4.60 83.52 NA NA NA 11/29/23 6.97 81.15 NA NA NA 04/24/17 5.22 84.52 NA NA NA 03/29/18 5.11 84.63 NA NA NA 11/30/20 5.09 84.65 NA NA NA 11/29/23 7.44 82.30 NA NA NA 04/24/17 7.93 89.84 NA NA NA 03/29/18 8.09 89.68 NA NA NA 11/30/20 4.55 93.22 NA NA NA 11/29/23 12.18 85.59 NA NA NA 04/24/17 8.81 91.19 NA NA NA 03/29/18 8.70 91.30 NA NA NA 11/30/20 6.32 93.68 NA NA NA 03/17/21*2.82 97.18 NA NA NA 04/19/21*2.72 97.28 NA NA NA 07/21/21*6.38 93.62 NA NA NA 02/25/22*6.60 93.40 NA NA NA 05/19/22*5.69 94.31 NA NA NA 08/18/22*10.84 89.16 NA NA NA 11/17/22*12.99 87.01 NA NA NA 02/22/23*6.67 93.33 NA NA NA 5/25/2023*5.75 94.25 NA NA NA 8/17/2023*9.08 90.92 NA NA NA 11/29/23 12.89 87.11 NA NA NA 04/24/17 5.65 94.75 NA NA NA 03/29/18 5.67 94.73 NA NA NA 11/30/20 4.34 96.06 NA NA NA 03/17/21*ATOC NM NA NA NA 04/19/21*ATOC NM NA NA NA 07/21/21*2.29 98.11 NA NA NA 02/25/22*4.28 96.12 NA NA NA 05/19/22*3.44 96.96 NA NA NA 08/18/22*10.22 90.18 NA NA NA 11/17/22*12.89 87.51 NA NA NA 02/22/23*4.00 96.40 NA NA NA 5/25/2023*3.63 96.77 NA NA NA 8/17/2023*8.03 92.37 NA NA NA 11/29/23 11.81 88.59 NA NA NA MW-8 100.00 MW-9 100.40 MW-5 88.12 MW-6 89.74 MW-7 97.77 ADT 7 Page 1 of 2 Table 7: Groundwater Elevation Data DSCA ID No.: DC760001 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] ADT 7 03/29/18 6.50 94.43 NA NA NA 11/30/20 5.44 95.49 NA NA NA 03/17/21*3.19 97.74 NA NA NA 04/19/21*2.23 98.70 NA NA NA 07/21/21*3.98 96.95 NA NA NA 02/25/22*3.97 96.96 NA NA NA 05/19/22*4.11 96.82 NA NA NA 08/18/22*5.36 95.57 NA NA NA 11/17/22*11.69 89.24 NA NA NA 02/22/23*8.19 92.74 NA NA NA 5/25/2023*7.66 93.27 NA NA NA 8/17/2023*7.94 92.99 NA NA NA 11/29/23 11.07 89.86 NA NA NA 03/29/18 6.04 94.78 NA NA NA 11/30/20 5.04 95.78 NA NA NA 11/29/23 11.52 89.30 NA NA NA NA = Not applicable, NAPL not observed. * = Depth to water measurement only. Well was not sampled for laboratory analysis. ATOC = Water level above top of well casing. NM = Groundwater elevation not measured. MW-10D 100.82 MW-10S 100.93 Page 2 of 2 Table 8: Analytical Data for Groundwater DSCA ID No.: DC760001 Be n z e n e ci s - 1 , 2 - D i c h l o r o e t h y l e n e Et h y l b e n z e n e Me t h y l t e r t - b u t y l e t h e r (M T B E ) Na p h t h a l e n e Te t r a c h l o r o e t h y l e n e To l u e n e tr a n s - 1 , 2 - D i c h l o r o e t h y l e n e Tr i c h l o r o e t h y l e n e Vi n y l c h l o r i d e Xy l e n e s ( t o t a l ) Ch l o r o f o r m 1, 1 - D i c h l o r o e t h e n e Di i s o p r o p y l E t h e r ( D I P E ) n- P r o p y l b e n z e n e 1, 2 , 3 - T r i m e t h y l b e n z e n e 0.001 0.07 0.6 0.02 0.006 0.0007 0.6 0.1 0.003 0.00003 0.5 0.07 0.350 0.07 0.07 NE 04/24/17 <0.0010 <0.0010 <0.0010 <0.0010 <0.0050 0.0024 <0.0010 <0.0010 <0.0010 <0.0020 <0.0030 <0.0020 <0.00021 <0.00050 <0.00013 NA 11/30/20 <0.000500 <0.000500 <0.000500 <0.000500 <0.00250 <0.000500 <0.000500 <0.000500 <0.000500 <0.000500 <0.00150 <0.000500 <0.000500 <0.000500 <0.000500 <0.000500 11/29/23 <0.000500 <0.000500 <0.000500 <0.000500 <0.00250 <0.000500 <0.000500 <0.000500 <0.000500 <0.000500 <0.00150 <0.000500 <0.000500 <0.000500 <0.000500 <0.000500 04/24/17 <0.0010 <0.0010 <0.0010 <0.0010 <0.0050 0.018 <0.0010 <0.0010 0.00021J <0.0020 <0.0030 <0.0020 <0.00021 0.00086 <0.00013 NA 11/30/20 <0.000500 0.00121 <0.000500 <0.000500 <0.00250 0.00275 <0.000500 <0.000500 0.00160 <0.000500 <0.00150 <0.000500 <0.000500 0.00307 <0.000500 <0.000500 11/29/23 <0.000500 0.00104 <0.000500 <0.000500 <0.00250 <0.000500 <0.000500 <0.000500 <0.000500 <0.000500 <0.00150 <0.000500 <0.000500 0.00653 <0.000500 <0.000500 04/24/17 <0.0010 <0.0010 <0.0010 <0.0010 <0.0050 0.014 <0.0010 <0.0010 <0.0010 <0.0020 <0.0030 <0.0020 <0.00021 <0.00050 <0.00013 NA 11/30/20 <0.000500 <0.000500 <0.000500 <0.000500 <0.00250 <0.000500 <0.000500 <0.000500 <0.000500 <0.000500 <0.00150 <0.000500 <0.000500 <0.000500 <0.000500 <0.000500 11/29/23 <0.000500 <0.000500 <0.000500 <0.000500 <0.00250 0.00103 <0.000500 <0.000500 <0.000500 <0.000500 <0.00150 <0.000500 <0.000500 <0.000500 <0.000500 <0.000500 04/24/17 <0.0010 <0.0010 <0.0010 <0.0010 <0.0050 0.091 <0.0010 <0.0010 0.00069J <0.0020 <0.0030 0.00074J <0.00021 <0.00050 <0.00013 NA 11/30/20 <0.000500 <0.000500 <0.000500 <0.000500 <0.00250 0.0367 <0.000500 <0.000500 0.000196J <0.000500 <0.00150 0.000272J <0.000500 <0.000500 <0.000500 <0.000500 11/30/23 <0.00250 <0.00250 0.000960J <0.00250 0.0195 0.0772 <0.00250 <0.00250 <0.00250 <0.00250 <0.00750 <0.00250 <0.00250 <0.00250 0.00158J 0.000865J 04/24/17 <1.0 0.84J <1.0 <1.0 <5.0 120 <1.0 <1.0 1.2 <2.0 <3.0 <2.0 <0.21 <0.50 <0.13 NA 11/30/20 0.0150 0.816 <0.0125 <0.0125 <0.0625 102 <0.0125 <0.0125 0.975 <0.0125 <0.0375 0.0188 0.142 <0.0125 <0.0125 <0.0125 11/30/23 <0.500 0.799 <0.500 <0.500 <2.50 99.3 <0.500 <0.500 1.050 <0.500 <1.50 <0.500 <0.500 <0.500 <0.500 <0.500 03/29/18 <0.50 <0.50 <0.50 <0.50 0.20J 24 <0.50 <0.50 <0.50 <1.0 <1.5 <1.0 <0.10 <0.25 <0.50 NA 11/30/20 0.000156J 0.268 <0.000500 <0.000500 <0.00250 3.140 <0.000500 <0.000500 0.0503 0.00100 <0.00150 <0.000500 0.000199J <0.000500 <0.000500 <0.000500 11/30/23 0.000340J 0.0709 <0.000500 <0.000500 <0.00250 6.380 <0.000500 <0.000500 0.0665 0.000450J <0.00150 0.000210J 0.000215J <0.000500 <0.000500 <0.000500 03/29/18 <0.010 <0.010 <0.010 <0.010 <0.020 0.41 <0.010 <0.010 <0.010 <0.020 <0.03 <0.020 <0.0021 <0.0050 <0.010 NA 11/30/20 <0.000500 0.0890 <0.000500 <0.000500 <0.00250 0.349 <0.000500 <0.000500 0.00384 <0.000500 <0.00150 0.000133J 0.000303J <0.000500 <0.000500 <0.000500 11/30/23 <0.000500 0.0611 <0.000500 <0.000500 <0.00250 0.384 <0.000500 0.000420J 0.00891 <0.000500 <0.00150 0.000134J 0.000484J <0.000500 <0.000500 <0.000500 Well identification numbers MW-1 through MW-4 were previously used at the site for temporary monitoring wells installed and sampled in 1998. NC 2L Standard = North Carolina groundwater standards as per 15A NCAC 2L .0202 (April 2022). <X: Below laboratory quantitation limit of X. J = Estimated concentration between the method detection limit and quantitation limit. NE - Not Established. NA = Not Analyzed. MW-7 MW-6 MW-5 MW-10D MW-10S MW-9 MW-8 NC 2L Standard Gr o u n d w a t e r S a m p l i n g P o i n t Sa m p l i n g D a t e ( m m / d d / y y ) [mg/L] ADT 8 Page 1 of 1 Table 10: Water Well(s) Survey Data DSCA ID No.: DC760001 Ref. No./ Well ID Sampling Location Name and Address Property Owner Name, Address, and Phone Number Tenant Name, Address, and Phone Number Distance from Source [feet] Well Depth [feet] Screen Interval [feet] Use of Well Source of Well Identification Direction (downgradient, upgradient, etc., to source area) Status (Active/ Inactive) WSW-1 1118 Oakdale St, Asheboro NC 27203 Mark D Clifton and Sherry C Samuelson 1118 Oakdale St, Asheboro, NC 27203 Mark D Clifton and Sherry C Samuelson 1118 Oakdale St, Asheboro, NC 27203 334 Unknown Unknown Unknown - property has city water account Visual Crossgradient Unknown WSW-2 1119 Oakdale St, Asheboro NC 27203 Hurleen I Maffett 1119 Oakdale St, Asheboro, NC 27203 Hurleen I Maffett 1119 Oakdale St, Asheboro, NC 27203 543 Unknown Unknown Unknown - property has city water account Visual Upgradient Unknown WSW-3 214 E Walker Ave, Asheboro NC 27203 Max G Bell 214 E Walker Ave, Asheboro, NC 27203 Max G Bell 214 E Walker Ave, Asheboro, NC 27203 860 Unknown Unknown Unknown - property has city water account Suspected well based on visual observation Upgradient Unknown WSW-4 1013 S Cox St, Asheboro NC 27203 Ruby Foster 1013 S Cox St, Asheboro, NC 27203 Ruby Foster 1013 S Cox St, Asheboro, NC 27203 445 Unknown Unknown Unknown - property has city water account Visual Upgradient Unknown WSW-5 304 Stowe Ave, Asheboro NC 27203 Timothy T and Emily N Teague 304 Stowe Ave, Asheboro, NC 27203 Timothy T and Emily N Teague 304 Stowe Ave, Asheboro, NC 27203 681 Unknown Unknown Unknown - property has city water account Visual Upgradient Unknown WSW-6 451 Lindsey Ave, Asheboro NC 27203 Jane D White 451 Lindsey Ave, Asheboro, NC 27203 Jane D White 451 Lindsey Ave, Asheboro, NC 27203 1,105 Unknown Unknown Unknown - property has city water account Visual Upgradient Unknown WSW-7 903 Center St, Asheboro NC 27203 Robert L Culpepper 1118 Oakdale St, Asheboro, NC 27203 Unknown 1,339 Unknown Unknown Unknown - property has city water account Suspected well based on visual observation Upgradient Unknown WSW-8 832 Center St, Asheboro NC 27203 Alisa Gale Routh 140 Idlewild Dr, Randleman, NC 27317 Unknown 1,623 Unknown Unknown Unknown - property has city water account Visual Upgradient Unknown WSW-9 325 Silver Ave, Asheboro NC 27203 Yvonne L Wright 460 E Franklinville St, Staley, NC 27355 Unknown 2,432 Unknown Unknown Unknown - property has city water account Visual Upgradient Unknown WSW-10 522 Stowe Ave, Asheboro NC 27203 Charles E and Junia Apple 522 Stowe Ave, Asheboro, NC 27203 Charles E and Junia Apple 522 Stowe Ave, Asheboro, NC 27203 2,039 Unknown Unknown Unknown - property has city water account Visual Upgradient Unknown WSW-11 1024 Cliff Rd, Asheboro NC 27203 Carolyn N Steele P O Box 356, Toast, NC 27049 Unknown 2,222 Unknown Unknown Unknown - property has city water account Visual Upgradient Unknown WSW-12 939 Cliff Rd, Asheboro NC 27203 Pattie Stepback and Braxton Lovette 9948 Domingo Dr, Brooksville, FL 34601 Unknown 2,443 Unknown Unknown Unknown - property has city water account Visual Upgradient Unknown ADT 10 Page 1 of 1 Table 12: Analytical Data for Natural Attenuation Parameters DSCA ID No.: DC760001 Sa m p l i n g D a t e ( m m / d d / y y ) Di s s o l v e d o x y g e n ( D O ) Ni t r a t e Su l f a t e Ma j o r C a t i o n s Me t h a n e Fe r r o u s I r o n Ox i d a t i o n r e d u c t i o n po t e n t i a l ( O R P ) Al k a l i n i t y Ch l o r i d e ( o p t i o n a l ) Co n d u c t i v i t y pH Te m p e r a t u r e To t a l o r g a n i c c a r b o n ( T O C ) Et h a n e Et h e n e Units mg/L mg/L mg/L mg/L mg/L mg/L mV mg/L mg/L μs/cm2 std unit ° C mg/L mg/L mg/L 04/24/17 4.31 NA NA NA NA NA 182.5 NA NA 329.0 6.90 17.27 NA NA NA 11/30/20 2.03 NA NA NA NA NA 176.4 NA NA 298.3 7.56 21.9 NA NA NA 11/29/23 3.72 NA NA NA NA NA 158.6 NA NA 172.1 7.02 16.1 NA NA NA 04/24/17 4.16 NA NA NA NA NA 184.3 NA NA 672.0 6.70 18.02 NA NA NA 11/30/20 0.22 NA NA NA NA NA -29.8 NA NA 540 7.07 21.9 NA NA NA 11/29/23 0.42 NA NA NA NA NA -54.8 NA NA 466 6.67 12.2 NA NA NA 04/24/17 4.75 NA NA NA NA NA 190.0 NA NA 516.0 6.40 16.98 NA NA NA 11/30/20 3.02 NA NA NA NA NA 169.7 NA NA 268.4 6.92 20.4 NA NA NA 11/29/23 0.98 NA NA NA NA NA 211.0 NA NA 270.2 6.37 16.7 NA NA NA 04/24/17 5.12 NA NA NA NA NA 197.4 NA NA 263.0 6.00 18.77 NA NA NA 11/30/20 3.00 NA NA NA NA NA 115.6 NA NA 584 6.53 22.8 NA NA NA 11/30/23 1.21 NA NA NA NA NA 237.0 NA NA 344.5 5.92 18.0 NA NA NA 04/24/17 6.39 NA NA NA NA NA 215.7 NA NA 165.0 5.50 16.77 NA NA NA 11/30/20 0.54 NA NA NA NA NA 184.2 NA NA 208.7 5.83 18.7 NA NA NA 11/30/23 1.21 NA NA NA NA NA 299.0 NA NA 151.0 5.25 18.2 NA NA NA 03/29/18 8.18 NA NA NA NA NA 171.6 NA NA 85.2 5.77 19.40 NA NA NA 11/30/20 0.33 NA NA NA NA NA 167.2 NA NA 193.4 5.73 19.7 NA NA NA 11/30/23 0.30 NA NA NA NA NA 301.5 NA NA 118.2 5.12 19.5 NA NA NA 03/29/18 2.44 NA NA NA NA NA 97.6 NA NA 90.5 6.08 21.30 NA NA NA 11/30/20 2.25 NA NA NA NA NA 106.4 NA NA 108.1 6.85 18.7 NA NA NA 11/30/23 2.02 NA NA NA NA NA 220.2 NA NA 75.2 6.26 19.6 NA NA NA NA = Not Applicable. MW-9 MW-10S MW-10D Sa m p l e I D MW-5 MW-6 MW-7 MW-8 ADT 12 Page 1 of 1 HILLSIDE SHOPPING CENTER BUILDING FAMILY FIRST HOME CARE COMMUNITY ONE BANK HOME PLATE MOTORS AUTO XCHANGE MW-5 MW-6 MW-7 MW-8 MW-9 MW-10D MW-10S APPROXIMATE LOCATIONOF COIN OPERATED DRY-CLEANING MACHINE W W W W W W W W W W W W 840 85 0 850 86 0 86 0 87 0 87 0 84 2 842 842 84 4 84 4 844 84 6 846 84 8 848 852 852 85 4 854 856 85 6 85 8 85 8 86 2 86 2 86 4 86 4 866 86 6 86 8 86 8 87 2 LEGEND: MONITORING WELLMW-5 Well Identification EXTERIOR BUILDING WALLS ESTIMATED FOOTPRINT OF FORMER DRY-CLEANER RANDOLPH COUNTY PARCELS EDGE OF PAVEMENT W W W RETAINING WALL SOURCE PROPERTY LINE 850 TOPOGRAPHIC LINE SCALE: 1" = 60' 200 40 60 N Attachement: Dr a w i n g F i l e : Pro j e c t N u m b e r : Ck d . B y : Drn . B y : Ap p ' d B y : Ck d . D a t e : Scale: Date: C: \ U S E R S \ E C H O . M I L A N U K \ O N E A T L A S \ D I G I T A L S E R V I C E S - F I L E S E R V E R \ 2 0 2 4 \ C A D D E P A R T M E N T \ N C D E Q - D W M - D S C A P R O G R A M \ 7 6 - 0 0 0 1 K I Z E R ' S A U T O M A T I C \ D C 7 6 0 1 S L 1 6 - S I T E . D W G , AT T 4 SI T E M A P 07/17/2024 SE E L O W E R L E F T KI Z E R ' S A U T O M A T I C S E L F S E R V I C E 13 3 E A S T T A F T A V E N U E AS H E B O R O , R A N D O L P H C O U N T Y , N O R T H C A R O L I N A DC 7 6 0 1 S L 1 6 AS SHOWN EM NK 4 NO T E S : 1. Fe a t u r e s s h o w n a r e n o t a n a u t h o r i t a t i v e l o c a t i o n , n o r a r e t h e y p r e s e n t e d to a s t a t e d a c c u r a c y . CO O R D I N A T E S Y S T E M : NA D 1 9 8 3 N O R T H C A R O L I N A S T A T E P L A N E F I P S 3 2 0 0 , U S S U R V E Y F E E T DS C A S I T E I D : DC 7 6 0 0 0 1 SCALE: 1" = 60' 200 40 60 N HILLSIDE SHOPPING CENTER BUILDING FAMILY FIRST HOME CARE COMMUNITY ONE BANK HOME PLATE MOTORS AUTO XCHANGE W W W W W W W W W W W W MW-5 MW-6 MW-7 MW-8 MW-9 MW-10D MW-10S APPROXIMATE LOCATIONOF COIN OPERATED DRY-CLEANING MACHINE 81.15 82.30 85.59 87.11 88.59 89.30* 89.86 LEGEND: EXTERIOR BUILDING WALLS ESTIMATED FOOTPRINT OF FORMER DRY-CLEANER RANDOLPH COUNTY PARCELS EDGE OF PAVEMENT W W W RETAINING WALL SOURCE PROPERTY LINE MW-2 737.64 MONITORING WELL Well Identification Relative Groundwater Elevation (ft) 81.0 GROUNDWATER ELEVATION CONTOUR (DASHED WHERE INFERRED) (ft) GROUNDWATER FLOW DIRECTION 82.0 83.0 84.0 85.0 86.0 87.0 88.0 89.0 Attachement: Dr a w i n g F i l e : Pro j e c t N u m b e r : Ck d . B y : Drn . B y : Ap p ' d B y : Ck d . D a t e : Scale: Date: C: \ U S E R S \ P H I L I P . H I N E S \ O N E A T L A S \ D I G I T A L S E R V I C E S - F I L E S E R V E R \ 2 0 2 4 \ C A D D E P A R T M E N T \ N C D E Q - D W M - D S C A P R O G R A M \ 7 6 - 0 0 0 1 K I Z E R ' S A U T O M A T I C \ D C 7 6 0 1 S L 1 6 - P O T . D W G , AT T 6 GR O U N D W A T E R E L E V A T I O N C O N T O U R M A P 01/30/2024 SE E L O W E R L E F T KI Z E R ' S A U T O M A T I C S E L F S E R V I C E 13 3 E A S T T A F T A V E N U E AS H E B O R O , R A N D O L P H C O U N T Y , N O R T H C A R O L I N A DC 7 6 0 1 S L 1 6 AS SHOWN PH JR 6 NO T E S : 1. Fe a t u r e s s h o w n a r e n o t a n a u t h o r i t a t i v e l o c a t i o n , n o r a r e t h e y p r e s e n t e d to a s t a t e d a c c u r a c y . 2. Gr o u n d w a t e r e l e v a t i o n m e a s u r e d o n 1 1 / 2 9 / 2 0 2 3 . 3. * = M W - 1 0 D w a s e x c l u d e d f r o m c o n t o u r s . CO O R D I N A T E S Y S T E M : NA D 1 9 8 3 N O R T H C A R O L I N A S T A T E P L A N E F I P S 3 2 0 0 , U S S U R V E Y F E E T DS C A S I T E I D : DC 7 6 0 0 0 1 SCALE: 1" = 60' 200 40 60 N HILLSIDE SHOPPING CENTER BUILDING FAMILY FIRST HOME CARE COMMUNITY ONE BANK HOME PLATE MOTORS AUTO XCHANGE W W W W W W W W W W W W MW-5 MW-6 MW-7 MW-8 MW-9 MW-10D MW-10S APPROXIMATE LOCATION OF COIN OPERATED DRY-CLEANING MACHINE LEGEND: MONITORING WELLMW-5 Well Identification EXTERIOR BUILDING WALLS ESTIMATED FOOTPRINT OF FORMER DRY-CLEANER RANDOLPH COUNTY PARCELS EDGE OF PAVEMENT W W W RETAINING WALL SOURCE PROPERTY LINE PCE ISOCONCENTRATION CONTOUR (DASHED WHERE INFERRED) (mg/L)0.07 0.0007 0.007 0.07 0.7 7 70 Attachement: Dr a w i n g F i l e : Pro j e c t N u m b e r : Ck d . B y : Drn . B y : Ap p ' d B y : Ck d . D a t e : Scale: Date: C: \ U S E R S \ P H I L I P . H I N E S \ O N E A T L A S \ D I G I T A L S E R V I C E S - F I L E S E R V E R \ 2 0 2 4 \ C A D D E P A R T M E N T \ N C D E Q - D W M - D S C A P R O G R A M \ 7 6 - 0 0 0 1 K I Z E R ' S A U T O M A T I C \ D C 7 6 0 1 S L 1 6 - G W . D W G , AT T 7 GR O U N D W A T E R A N A L Y T I C A L M A P 01/30/2024 SE E L O W E R L E F T KI Z E R ' S A U T O M A T I C S E L F S E R V I C E 13 3 E A S T T A F T A V E N U E AS H E B O R O , R A N D O L P H C O U N T Y , N O R T H C A R O L I N A DC 7 6 0 1 S L 1 6 AS SHOWN PH JR 7 NO T E S : 1. Fe a t u r e s s h o w n a r e n o t a n a u t h o r i t a t i v e l o c a t i o n , n o r a r e t h e y p r e s e n t e d to a s t a t e d a c c u r a c y . 2. Gr o u n d w a t e r s a m p l e s c o l l e c t e d o n 1 1 / 2 9 - 3 0 / 2 0 2 3 . 3. * = M W - 1 0 D w a s e x c l u d e d f r o m c o n t o u r s . 4. Fig u r e d e p i c t s o n l y c o n t a m i n a n t s d e t e c t e d a t c o n c e n t r a t i o n s a b o v e 15 A N C A C 2 L G r o u n d w a t e r S t a n d a r d s . CO O R D I N A T E S Y S T E M : NA D 1 9 8 3 N O R T H C A R O L I N A S T A T E P L A N E F I P S 3 2 0 0 , U S S U R V E Y F E E T DS C A S I T E I D : DC 7 6 0 0 0 1 ATTACHMENT 8 GROUNDWATER CONCENTRATION TREND PLOTS Evaluation Date:Job ID: Facility Name:Constituent: Conducted By:Concentration Units:mg/L Sampling Point ID:PCE Sampling Sampling Event Date 1 24-Apr-17 0.0024 2 30-Nov-20 0.00025 3 30-Nov-23 0.00025 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 Coefficient of Variation:1.28 Mann-Kendall Statistic (S):-2 Confidence Factor: Concentration Trend: Notes: 1.At least four independent sampling events per well are required for calculating the trend. Methodology is valid for 4 to 40 samples. 2.Confidence in Trend = Confidence (in percent) that constituent concentration is increasing (S>0) or decreasing (S<0): >95% = Increasing or Decreasing; ≥ 90% = Probably Increasing or Probably Decreasing; < 90% and S>0 = No Trend; < 90%, S≤0, and COV ≥ 1 = No Trend; < 90% and COV < 1 = Stable. 3.Methodology based on "MAROS: A Decision Support System for Optimizing Monitoring Plans", J.J. Aziz, M. Ling, H.S. Rifai, C.J. Newell, and J.R. Gonzales, Ground Water, 41(3):355-367, 2003. 4.Not detected. Value represents 1/2 of the laboratory reporting limit. DISCLAIMER: The GSI Mann-Kendall Toolkit is available "as is". Considerable care has been exercised in preparing this software product; however, no party, including without limitation GSI Environmental Inc., makes any representation or warranty regarding the accuracy, correctness, or completeness of the information contained herein, and no such party shall be liable for any direct, indirect, consequential, incidental or other damages resulting from the use of this product or the information contained herein. Information in this publication is subject to change without notice. GSI Environmental Inc., disclaims any responsibility or obligation to update the information contained herein. MW-5 CONCENTRATION (mg/L) GSI Environmental Inc., www.gsi-net.com GSI MANN-KENDALL TOOLKIT for Constituent Trend Analysis 17-Jul-24 DC760001 Kizer's Automatic Self Service MW-5 Larry George 0.0001 0.001 0.01 0.1 1 05/16 09/17 02/19 06/20 10/21 03/23 07/24 Co n c e n t r a t i o n ( m g / L ) Sampling Date PCE PCE Evaluation Date:Job ID: Facility Name:Constituent: Conducted By:Concentration Units:mg/L Sampling Point ID:PCE TCE cis-1,2-DCE Sampling Sampling Event Date 1 24-Apr-17 0.018 0.00021 0.0005 2 30-Nov-20 0.00275 0.0016 0.00121 3 30-Nov-23 0.00025 0.00025 0.00104 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 Coefficient of Variation:1.37 1.15 0.40 Mann-Kendall Statistic (S):-3 1 1 Confidence Factor: Concentration Trend: Notes: 1.At least four independent sampling events per well are required for calculating the trend. Methodology is valid for 4 to 40 samples. 2.Confidence in Trend = Confidence (in percent) that constituent concentration is increasing (S>0) or decreasing (S<0): >95% = Increasing or Decreasing; ≥ 90% = Probably Increasing or Probably Decreasing; < 90% and S>0 = No Trend; < 90%, S≤0, and COV ≥ 1 = No Trend; < 90% and COV < 1 = Stable. 3.Methodology based on "MAROS: A Decision Support System for Optimizing Monitoring Plans", J.J. Aziz, M. Ling, H.S. Rifai, C.J. Newell, and J.R. Gonzales, Ground Water, 41(3):355-367, 2003. 4.Not detected. Value represents 1/2 of the laboratory reporting limit. DISCLAIMER: The GSI Mann-Kendall Toolkit is available "as is". Considerable care has been exercised in preparing this software product; however, no party, including without limitation GSI Environmental Inc., makes any representation or warranty regarding the accuracy, correctness, or completeness of the information contained herein, and no such party shall be liable for any direct, indirect, consequential, incidental or other damages resulting from the use of this product or the information contained herein. Information in this publication is subject to change without notice. GSI Environmental Inc., disclaims any responsibility or obligation to update the information contained herein. MW-6 CONCENTRATION (mg/L) GSI Environmental Inc., www.gsi-net.com GSI MANN-KENDALL TOOLKIT for Constituent Trend Analysis 17-Jul-24 DC760001 Kizer's Automatic Self Service MW-6 Larry George 0.0001 0.001 0.01 0.1 1 05/16 09/17 02/19 06/20 10/21 03/23 07/24 Co n c e n t r a t i o n ( m g / L ) Sampling Date PCE TCE cis-1,2-DCE Evaluation Date:Job ID: Facility Name:Constituent: Conducted By:Concentration Units:mg/L Sampling Point ID:PCE Sampling Sampling Event Date 1 24-Apr-17 0.014 2 30-Nov-20 0.00025 3 30-Nov-23 0.00103 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 Coefficient of Variation:1.52 Mann-Kendall Statistic (S):-1 Confidence Factor: Concentration Trend: Notes: 1.At least four independent sampling events per well are required for calculating the trend. Methodology is valid for 4 to 40 samples. 2.Confidence in Trend = Confidence (in percent) that constituent concentration is increasing (S>0) or decreasing (S<0): >95% = Increasing or Decreasing; ≥ 90% = Probably Increasing or Probably Decreasing; < 90% and S>0 = No Trend; < 90%, S≤0, and COV ≥ 1 = No Trend; < 90% and COV < 1 = Stable. 3.Methodology based on "MAROS: A Decision Support System for Optimizing Monitoring Plans", J.J. Aziz, M. Ling, H.S. Rifai, C.J. Newell, and J.R. Gonzales, Ground Water, 41(3):355-367, 2003. 4.Not detected. Value represents 1/2 of the laboratory reporting limit. DISCLAIMER: The GSI Mann-Kendall Toolkit is available "as is". Considerable care has been exercised in preparing this software product; however, no party, including without limitation GSI Environmental Inc., makes any representation or warranty regarding the accuracy, correctness, or completeness of the information contained herein, and no such party shall be liable for any direct, indirect, consequential, incidental or other damages resulting from the use of this product or the information contained herein. Information in this publication is subject to change without notice. GSI Environmental Inc., disclaims any responsibility or obligation to update the information contained herein. MW-7 CONCENTRATION (mg/L) GSI Environmental Inc., www.gsi-net.com GSI MANN-KENDALL TOOLKIT for Constituent Trend Analysis 17-Jul-24 DC760001 Kizer's Automatic Self Service MW-7 Larry George 0.0001 0.001 0.01 0.1 1 05/16 09/17 02/19 06/20 10/21 03/23 07/24 Co n c e n t r a t i o n ( m g / L ) Sampling Date PCE PCE Evaluation Date:Job ID: Facility Name:Constituent: Conducted By:Concentration Units:mg/L Sampling Point ID:PCE TCE Naphthalene Sampling Sampling Event Date 1 24-Apr-17 0.091 0.00069 0.0025 2 30-Nov-20 0.0367 0.000196 0.00125 3 30-Nov-23 0.0772 0.00125 0.195 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 Coefficient of Variation:0.41 0.74 1.68 Mann-Kendall Statistic (S):-1 1 1 Confidence Factor: Concentration Trend: Notes: 1.At least four independent sampling events per well are required for calculating the trend. Methodology is valid for 4 to 40 samples. 2.Confidence in Trend = Confidence (in percent) that constituent concentration is increasing (S>0) or decreasing (S<0): >95% = Increasing or Decreasing; ≥ 90% = Probably Increasing or Probably Decreasing; < 90% and S>0 = No Trend; < 90%, S≤0, and COV ≥ 1 = No Trend; < 90% and COV < 1 = Stable. 3.Methodology based on "MAROS: A Decision Support System for Optimizing Monitoring Plans", J.J. Aziz, M. Ling, H.S. Rifai, C.J. Newell, and J.R. Gonzales, Ground Water, 41(3):355-367, 2003. 4.Not detected. Value represents 1/2 of the laboratory reporting limit. DISCLAIMER: The GSI Mann-Kendall Toolkit is available "as is". Considerable care has been exercised in preparing this software product; however, no party, including without limitation GSI Environmental Inc., makes any representation or warranty regarding the accuracy, correctness, or completeness of the information contained herein, and no such party shall be liable for any direct, indirect, consequential, incidental or other damages resulting from the use of this product or the information contained herein. Information in this publication is subject to change without notice. GSI Environmental Inc., disclaims any responsibility or obligation to update the information contained herein. MW-8 CONCENTRATION (mg/L) GSI Environmental Inc., www.gsi-net.com GSI MANN-KENDALL TOOLKIT for Constituent Trend Analysis 17-Jul-24 DC760001 Kizer's Automatic Self Service MW-8 Larry George 0.0001 0.001 0.01 0.1 1 05/16 09/17 02/19 06/20 10/21 03/23 07/24 Co n c e n t r a t i o n ( m g / L ) Sampling Date PCE TCE Naphthalene Evaluation Date:Job ID: Facility Name:Constituent: Conducted By:Concentration Units:mg/L Sampling Point ID:PCE TCE cis-1,2-DCE Benzene Sampling Sampling Event Date 1 24-Apr-17 120 1.2 0.844 0.5 2 30-Nov-20 102 0.975 0.816 0.150 3 30-Nov-23 99.3 1.050 0.799 0.250 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 Coefficient of Variation:0.11 0.11 0.03 0.60 Mann-Kendall Statistic (S):-3 -1 -3 -1 Confidence Factor: Concentration Trend: Notes: 1.At least four independent sampling events per well are required for calculating the trend. Methodology is valid for 4 to 40 samples. 2.Confidence in Trend = Confidence (in percent) that constituent concentration is increasing (S>0) or decreasing (S<0): >95% = Increasing or Decreasing; ≥ 90% = Probably Increasing or Probably Decreasing; < 90% and S>0 = No Trend; < 90%, S≤0, and COV ≥ 1 = No Trend; < 90% and COV < 1 = Stable. 3.Methodology based on "MAROS: A Decision Support System for Optimizing Monitoring Plans", J.J. Aziz, M. Ling, H.S. Rifai, C.J. Newell, and J.R. Gonzales, Ground Water, 41(3):355-367, 2003. 4.Not detected. Value represents 1/2 of the laboratory reporting limit. DISCLAIMER: The GSI Mann-Kendall Toolkit is available "as is". Considerable care has been exercised in preparing this software product; however, no party, including without limitation GSI Environmental Inc., makes any representation or warranty regarding the accuracy, correctness, or completeness of the information contained herein, and no such party shall be liable for any direct, indirect, consequential, incidental or other damages resulting from the use of this product or the information contained herein. Information in this publication is subject to change without notice. GSI Environmental Inc., disclaims any responsibility or obligation to update the information contained herein. GSI Environmental Inc., www.gsi-net.com MW-9 CONCENTRATION (mg/L) 17-Jul-24 Kizer's Automatic Self Service MW-9 GSI MANN-KENDALL TOOLKIT for Constituent Trend Analysis Larry George DC760001 0.1 1 10 100 1000 05/16 09/17 02/19 06/20 10/21 03/23 07/24 Co n c e n t r a t i o n ( m g / L ) Sampling Date PCE TCE cis-1,2-DCE Benzene Evaluation Date:Job ID: Facility Name:Constituent: Conducted By:Concentration Units:mg/L Sampling Point ID:PCE TCE cis-1,2-DCE Vinyl Chloride Naphthalene Sampling Sampling Event Date 1 29-Mar-18 24 0.25 0.25 0.50 0.20 2 30-Nov-20 3.140 0.0503 0.268 0.00100 0.00125 3 30-Nov-23 6.380 0.665 0.0709 0.000450 0.00125 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 Coefficient of Variation:1.00 0.97 0.56 1.72 1.70 Mann-Kendall Statistic (S):-1 1 -1 -3 -2 Confidence Factor: Concentration Trend: Notes: 1.At least four independent sampling events per well are required for calculating the trend. Methodology is valid for 4 to 40 samples. 2.Confidence in Trend = Confidence (in percent) that constituent concentration is increasing (S>0) or decreasing (S<0): >95% = Increasing or Decreasing; ≥ 90% = Probably Increasing or Probably Decreasing; < 90% and S>0 = No Trend; < 90%, S≤0, and COV ≥ 1 = No Trend; < 90% and COV < 1 = Stable. 3.Methodology based on "MAROS: A Decision Support System for Optimizing Monitoring Plans", J.J. Aziz, M. Ling, H.S. Rifai, C.J. Newell, and J.R. Gonzales, Ground Water, 41(3):355-367, 2003. 4.Not detected. Value represents 1/2 of the laboratory reporting limit. DISCLAIMER: The GSI Mann-Kendall Toolkit is available "as is". Considerable care has been exercised in preparing this software product; however, no party, including without limitation GSI Environmental Inc., makes any representation or warranty regarding the accuracy, correctness, or completeness of the information contained herein, and no such party shall be liable for any direct, indirect, consequential, incidental or other damages resulting from the use of this product or the information contained herein. Information in this publication is subject to change without notice. GSI Environmental Inc., disclaims any responsibility or obligation to update the information contained herein. MW-10S CONCENTRATION (mg/L) GSI Environmental Inc., www.gsi-net.com GSI MANN-KENDALL TOOLKIT for Constituent Trend Analysis 17-Jul-24 DC760001 Kizer's Automatic Self Service MW-10S Larry George 0.0001 0.001 0.01 0.1 1 10 100 09/17 02/19 06/20 10/21 03/23 07/24 Co n c e n t r a t i o n ( m g / L ) Sampling Date PCE TCE cis-1,2-DCE Vinyl Chloride Naphthalene Evaluation Date:Job ID: Facility Name:Constituent: Conducted By:Concentration Units:mg/L Sampling Point ID:PCE TCE cis-1,2-DCE Sampling Sampling Event Date 1 29-Mar-18 0.41 0.005 0.005 2 30-Nov-20 0.349 0.00384 0.0890 3 30-Nov-23 0.384 0.00891 0.0611 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 Coefficient of Variation:0.08 0.45 0.83 Mann-Kendall Statistic (S):-1 1 1 Confidence Factor: Concentration Trend: Notes: 1.At least four independent sampling events per well are required for calculating the trend. Methodology is valid for 4 to 40 samples. 2.Confidence in Trend = Confidence (in percent) that constituent concentration is increasing (S>0) or decreasing (S<0): >95% = Increasing or Decreasing; ≥ 90% = Probably Increasing or Probably Decreasing; < 90% and S>0 = No Trend; < 90%, S≤0, and COV ≥ 1 = No Trend; < 90% and COV < 1 = Stable. 3.Methodology based on "MAROS: A Decision Support System for Optimizing Monitoring Plans", J.J. Aziz, M. Ling, H.S. Rifai, C.J. Newell, and J.R. Gonzales, Ground Water, 41(3):355-367, 2003. 4.Not dectected. Value represents 1/2 of the laboratory reporting limit. DISCLAIMER: The GSI Mann-Kendall Toolkit is available "as is". Considerable care has been exercised in preparing this software product; however, no party, including without limitation GSI Environmental Inc., makes any representation or warranty regarding the accuracy, correctness, or completeness of the information contained herein, and no such party shall be liable for any direct, indirect, consequential, incidental or other damages resulting from the use of this product or the information contained herein. Information in this publication is subject to change without notice. GSI Environmental Inc., disclaims any responsibility or obligation to update the information contained herein. MW-10D CONCENTRATION (mg/L) GSI Environmental Inc., www.gsi-net.com GSI MANN-KENDALL TOOLKIT for Constituent Trend Analysis 17-Jul-24 DC760001 Kizer's Automatic Self Service MW-10D Larry George 0.001 0.01 0.1 1 09/17 02/19 06/20 10/21 03/23 07/24 Co n c e n t r a t i o n ( m g / L ) Sampling Date PCE TCE cis-1,2-DCE LEGEND: SITE PROPERTY LINE NOTE: ALL LOCATIONS ARE APPROXIMATE CONCENTRATION DATA ARE IN UNITS OF MICROGRAMS PER CUBIC METER (µg/m3). BOLD = EXCEEDS THE TARGET CUMULATIVE CARCINOGENIC RISK OF 1E-04 AND/OR CUMULATIVE NON-CARCINOGENIC RISK OF 1. RANDOLPH COUNTY PARCEL LINE SGMP-1 SOIL-GAS MONITORING POINT Sample Identification EXTERIOR BUILDING WALLS DEMISING BUILDING WALLS INTERIOR TENANT WALLS EDGE OF PAVEMENT ESTIMATED FOOTPRINT OF FORMER DRY CLEANER APPROXIMATE LOCATION OF COINOPERATED DRY-CLEANING MACHINE SGMP-1 SGMP-2 SGMP-3 10 SCALE: 1" = 30' 0 20 30 N HILLSIDESHOPPING CENTER BUILDING STUDIO J.DANCE CENTER BUILDINGOVERHANG TROGDONBAIL BONDS STORAGE TRANZFORMATIONS SHED RESIDENTIAL RESIDENTIAL RESIDENTIAL Figure: Dr a w i n g F i l e : Pro j e c t N u m b e r : Ck d . B y : Drn . B y : Ap p ' d B y : Ck d . D a t e : Scale: Date: OF F - S O U R C E S O I L - G A S A N A L Y T I C A L M A P KI Z E R ' S A U T O M A T I C S E L F S E R V I C E 13 3 E A S T T A F T A V E N U E AS H B O R O , R A N D O L P H C O U N T Y , N O R T H C A R O L I N A DC 7 6 0 1 S L 1 6 AS SHOWN EM NK 13/14A NO T E S : 1. Fe a t u r e s s h o w n a r e n o t a n a u t h o r i t a t i v e l o c a t i o n , n o r a r e t h e y p r e s e n t e d to a s t a t e d a c c u r a c y . CO O R D I N A T E S Y S T E M : NA D 1 9 8 3 N O R T H C A R O L I N A S T A T E P L A N E F I P S 3 2 0 0 , U S S U R V E Y F E E T 07/17/2024 SE E L O W E R L E F T STUDIO J. DANCE CENTER TASTE OF ASIA BUILDING OVERHANG STORAGE SHED HVS-4 LEGEND: EXTERIOR BUILDING WALLS INTERIOR TENANT WALLS DEMISING WALLS ESTIMATED FOOTPRINT OF FORMER DRY-CLEANER RANDOLPH COUNTY PARCELS EDGE OF PAVEMENT Sample Identification SUB-SLAB DEPRESSURIZATION SYSTEM SUB-SLAB DEPRESSURIZATION SYSTEM FAN IA-4 IA-6 IA-7 IA-2 IA-1 SINK NOTE: ·CONCENTRATION DATA ARE IN UNITS OF MICROGRAMS PER CUBIC METER. · : EXCEEDS THE TARGET RESIDENTIAL CUMULATIVE CARCINOGENIC RISK OF 1E-04 AND/OR HAZARD INDEX RISK OF 1. · : EXCEEDS THE TARGET NON-RESIDENTIAL CUMULATIVE CARCINOGENIC RISK OF 1E-04 AND/OR HAZARD INDEX RISK OF 1. ·J = ESTIMATED CONCENTRATION BETWEEN THE LABORATORY METHOD DETECTION LIMIT AND THE LABORATORY REPORTING LIMIT. ·<X = CONCENTRATION IS BELOW THE LABORATORY REPORTING LIMIT OF X ·* = SAMPLE COLLECTED WHILE SUB-SLAB DEPRESSURIZATION SYSTEM WAS ACTIVE. ·m = MANUAL INTEGRATION ·C = ESTIMATED FLOW RATE ·ALL SAMPLES COLLECTED OVER AN 8-HOUR TIME PERIOD, UNLESS OTHERWISE NOTED. ·SAMPLE LOCATION COLORATION REFLECTS RISK BASED ON MOST-RECENT SAMPLING IA-1IA-1 INDOOR AIR LOCATION NO CURRENT RISK EXCEEDANCES Sample Identification IA-10 IA-9 IA-5 IA-8 MW-8 MW-9 MW-10D MW-10S MONITORING WELL Well Identification MW-8 SUB-SLAB DEPRESSURIZATION SYSTEM EXTRACTION POINT - RESIDENTIAL RISK EXCEEDANCES Sample Identification SUB-SLAB DEPRESSURIZATION SYSTEM EXTRACTION POINT - NON-RESIDENTIAL RISK EXCEEDANCES Sample Identification HVS-5 HVS-3 EP-6 EP-8 EP-7 EP-6 SS-5 SS-10 SS-9 SS-1 SS-16 NS NS NS NS IA-3 SS-15 SS-14 NS NS NS NS SS-17 SS-12 SS-13 SUB-SLAB GAS LOCATION NON-RESIDENTIAL RISK EXCEEDANCES Sample Identification SUB-SLAB GAS LOCATION NO HISTORICAL SAMPLING Sample Identification SS-1 SUB-SLAB GAS LOCATION RESIDENTIAL RISK EXCEEDANCES Sample Identification SS-3 SS-10 Sample Identification SUB-SLAB/SUB-PAVEMENT GAS LOCATION NO CURRENT RISK EXCEEDANCES NSSS-15 SS-4 SS-2SS-3 SS7/ HVS-2 SS6/ HVS-1 SS8/ HVS-3 SS11/ HVS-5 DESTROYED SUB SLAB GAS LOCATION SS-2 Sample Identification EXTRACTION POINT - NO HISTORICAL LABORATORY ANALYTICAL DATA SCALE: 1" = 20' 0 5 10 15 20 N Figure: Dra w i n g F i l e : Pr o j e c t N u m b e r : Ck d . B y : Dr n . B y : Ap p ' d B y : Ck d . D a t e : Scale: Date: C: \ U S E R S \ E C H O . M I L A N U K \ O N E A T L A S \ D I G I T A L S E R V I C E S - F I L E S E R V E R \ 2 0 2 4 \ C A D D E P A R T M E N T \ N C D E Q - D W M - D S C A P R O G R A M \ 7 6 - 0 0 0 1 K I Z E R ' S A U T O M A T I C \ D C 7 6 0 1 S L 1 6 - I A . D W G , AT T 1 3 . 1 4 B IN D O O R A I R A N A L Y T I C A L M A P NO T E S : 1. Fe a t u r e s s h o w n a r e n o t a n a u t h o r i t a t i v e l o c a t i o n , n o r a r e t h e y p r e s e n t e d to a s t a t e d a c c u r a c y . 2. Da t a t a b l e s o n l y i n c l u d e d a t e f r o m 2 0 1 9 t o p r e s e n t . CO O R D I N A T E S Y S T E M : NA D 1 9 8 3 N O R T H C A R O L I N A S T A T E P L A N E F I P S 3 2 0 0 , U S S U R V E Y F E E T DS C A S i t e I D : DC 7 6 0 0 0 1 7/24 SE E L O W E R L E F T KI Z E R ' S A U T O M A T I C S E L F S E R V I C E L A U N D R Y 13 3 E A S T T A F T A V E N U E AS H E B O R O , R A N D O L P H C O U N T Y , N O R T H C A R O L I N A DC 7 6 0 1 S L 1 6 AS SHOWN EM NK 13/14B MW-8 APPROXIMATE LOCATION OF COIN OPERATED DRY-CLEANING MACHINE SS-4 SS-2 SINK LEGEND: EXTERIOR BUILDING WALLS INTERIOR TENANT WALLS DEMISING WALLS ESTIMATED FOOTPRINT OF FORMER DRY-CLEANER RANDOLPH COUNTY PARCELS EDGE OF PAVEMENT SUB-SLAB DEPRESSURIZATION SYSTEM FAN SS-3 SS-5 SS-10 SS-9 HVS-4SS-6/ HVS-1 SS-7/ HVS-2 SS-8/ HVS-3 SS-1 SS-11/ HVS-5 SS-16 NS NS NS NS MW-9 MW-10D MW-10S IA-4 IA-7 IA-2 IA-5 IA-8 IA-3 SS-15 SS-14 SS-17 SS-12 SS-13 Sample Identification SUB-SLAB DEPRESSURIZATION SYSTEM IA-1IA-1 INDOOR AIR LOCATION NO CURRENT RISK EXCEEDANCES Sample Identification MONITORING WELL Well Identification MW-8 SUB-SLAB DEPRESSURIZATION SYSTEM EXTRACTION POINT - RESIDENTIAL RISK EXCEEDANCES Sample Identification SUB-SLAB DEPRESSURIZATION SYSTEM EXTRACTION POINT - NON-RESIDENTIAL RISK EXCEEDANCES Sample Identification HVS-5 HVS-3 EP-6NS SUB-SLAB GAS LOCATION NON-RESIDENTIAL RISK EXCEEDANCES Sample Identification SUB-SLAB GAS LOCATION NO HISTORICAL SAMPLING Sample Identification SS-1 SUB-SLAB GAS LOCATION RESIDENTIAL RISK EXCEEDANCES Sample Identification SS-16 SS-10 Sample Identification SUB-SLAB/SUB-PAVEMNT GAS LOCATION NO CURRENT RISK EXCEEDANCES NSSS-15 NOTE: ·CONCENTRATION DATA ARE IN UNITS OF MICROGRAMS PER CUBIC METER. · : EXCEEDS THE TARGET RESIDENTIAL CUMULATIVE CARCINOGENIC RISK OF 1E-04 AND/OR HAZARD INDEX RISK OF 1. · : EXCEEDS THE TARGET NON-RESIDENTIAL CUMULATIVE CARCINOGENIC RISK OF 1E-04 AND/OR HAZARD INDEX RISK OF 1. ·J = ESTIMATED CONCENTRATION BETWEEN THE LABORATORY METHOD DETECTION LIMIT AND THE LABORATORY REPORTING LIMIT. ·<X = CONCENTRATION IS BELOW THE LABORATORY REPORTING LIMIT OF X ·* = SAMPLE COLLECTED WHILE SUB-SLAB DEPRESSURIZATION SYSTEM WAS ACTIVE. ·SAMPLE LOCATION COLORATION REFLECTS RISK BASED ON MOST-RECENT SAMPLING EP-8 EP-7 EP-6 NS NS NS IA-6 DESTROYED SUB SLAB GAS LOCATION Sample Identification SS-4 EXTRACTION POINT - NO HISTORICAL LABORATORY ANALYTICAL DATA IA-1IA-10 IA-9 SCALE: 1" = 20' 0 5 10 15 20 N Figure: Dra w i n g F i l e : Pr o j e c t N u m b e r : Ck d . B y : Dr n . B y : Ap p ' d B y : Ck d . D a t e : Scale: Date: C: \ U S E R S \ E C H O . M I L A N U K \ O N E A T L A S \ D I G I T A L S E R V I C E S - F I L E S E R V E R \ 2 0 2 4 \ C A D D E P A R T M E N T \ N C D E Q - D W M - D S C A P R O G R A M \ 7 6 - 0 0 0 1 K I Z E R ' S A U T O M A T I C \ D C 7 6 0 1 S L 1 6 - S S . D W G , AT T 1 3 . 1 4 C SU B - S L A B A N D S U B - P A V E M E N T G A S AN A L Y T I C A L M A P 7/24 SE E L O W E R L E F T KI Z E R ' S A U T O M A T I C S E L F S E R V I C E L A U N D R Y 13 3 E A S T T A F T A V E N U E AS H E B O R O , R A N D O L P H C O U N T Y , N O R T H C A R O L I N A DC 7 6 0 1 S L 1 6 AS SHOWN EM NK 13/14C NO T E S : 1. Fe a t u r e s s h o w n a r e n o t a n a u t h o r i t a t i v e l o c a t i o n , n o r a r e t h e y p r e s e n t e d to a s t a t e d a c c u r a c y . CO O R D I N A T E S Y S T E M : NA D 1 9 8 3 N O R T H C A R O L I N A S T A T E P L A N E F I P S 3 2 0 0 , U S S U R V E Y F E E T DS C A S i t e I D : DC 7 6 0 0 0 1 ATTACHMENT 15 LABORATORY ANALYTICAL REPORT ANALYTICAL REPORT December 12, 2023 ATC Group Services LLC Sample Delivery Group:L1684381 Samples Received:12/05/2023 Project Number: Description:Kizer's Automatic Self Service Report To:Larry George 2725 E. Millbrook Road, Ste 121 Raleigh, NC 27604 Entire Report Reviewed By: December 12, 2023 [Preliminary Report] Heather J Wagner Project Manager Results relate only to the items tested or calibrated and are reported as rounded values. This test report shall not be reproduced, except in full, without written approval of the laboratory. Where applicable, sampling conducted by Pace Analytical National is performed per guidance provided in laboratory standard operating procedures ENV-SOP-MTJL-0067 and ENV-SOP-MTJL-0068. Where sampling conducted by the customer, results relate to the accuracy of the information provided, and as the samples are received. Pace Analytical National 12065 Lebanon Rd Mount Juliet, TN 37122 615-758-5858 800-767-5859 www.pacenational.com 1 Cp 2Tc 3Ss 4Cn 5Sr 6Qc 7Gl 8Al 9Sc ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE: ATC Group Services LLC L1684381 12/12/23 16:54 1 of 29 December 14, 2023 Heather J Wagner Project Manager ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE: ATC Group Services LLC L1684381 12/14/23 00:11 1 of 29 TABLE OF CONTENTS Cp: Cover Page 1 Tc: Table of Contents 2 Ss: Sample Summary 3 Cn: Case Narrative 4 Sr: Sample Results 5 MW-5 L1684381-01 5 MW-6 L1684381-02 7 MW-7 L1684381-03 9 MW-8 L1684381-04 11 MW-9 L1684381-05 13 MW-10S L1684381-06 15 MW-10D L1684381-07 17 Qc: Quality Control Summary 19 Volatile Organic Compounds (GC/MS) by Method 8260D 19 Gl: Glossary of Terms 27 Al: Accreditations & Locations 28 Sc: Sample Chain of Custody 29 1 Cp 2Tc 3Ss 4Cn 5Sr 6Qc 7Gl 8Al 9Sc ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE: ATC Group Services LLC L1684381 12/12/23 16:54 2 of 29 ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE: ATC Group Services LLC L1684381 12/14/23 00:11 2 of 29 SAMPLE SUMMARY Collected by Collected date/time Received date/time MW-5 L1684381-01 GW Nick Kramer 11/29/23 15:55 12/05/23 09:00 Method Batch Dilution Preparation Analysis Analyst Location date/time date/time Volatile Organic Compounds (GC/MS) by Method 8260D WG2186772 1 12/11/23 00:34 12/11/23 00:34 ACG Mt. Juliet, TN Collected by Collected date/time Received date/time MW-6 L1684381-02 GW Nick Kramer 11/29/23 16:20 12/05/23 09:00 Method Batch Dilution Preparation Analysis Analyst Location date/time date/time Volatile Organic Compounds (GC/MS) by Method 8260D WG2186772 1 12/11/23 00:53 12/11/23 00:53 ACG Mt. Juliet, TN Collected by Collected date/time Received date/time MW-7 L1684381-03 GW Nick Kramer 11/29/23 15:15 12/05/23 09:00 Method Batch Dilution Preparation Analysis Analyst Location date/time date/time Volatile Organic Compounds (GC/MS) by Method 8260D WG2186772 1 12/11/23 01:13 12/11/23 01:13 ACG Mt. Juliet, TN Collected by Collected date/time Received date/time MW-8 L1684381-04 GW Nick Kramer 11/30/23 09:40 12/05/23 09:00 Method Batch Dilution Preparation Analysis Analyst Location date/time date/time Volatile Organic Compounds (GC/MS) by Method 8260D WG2187274 5 12/12/23 01:21 12/12/23 01:21 JBE Mt. Juliet, TN Collected by Collected date/time Received date/time MW-9 L1684381-05 GW Nick Kramer 11/30/23 11:07 12/05/23 09:00 Method Batch Dilution Preparation Analysis Analyst Location date/time date/time Volatile Organic Compounds (GC/MS) by Method 8260D WG2186772 1000 12/11/23 04:51 12/11/23 04:51 ACG Mt. Juliet, TN Collected by Collected date/time Received date/time MW-10S L1684381-06 GW Nick Kramer 11/30/23 10:40 12/05/23 09:00 Method Batch Dilution Preparation Analysis Analyst Location date/time date/time Volatile Organic Compounds (GC/MS) by Method 8260D WG2186772 1 12/11/23 01:33 12/11/23 01:33 ACG Mt. Juliet, TN Volatile Organic Compounds (GC/MS) by Method 8260D WG2187274 100 12/12/23 01:40 12/12/23 01:40 JBE Mt. Juliet, TN Collected by Collected date/time Received date/time MW-10D L1684381-07 GW Nick Kramer 11/30/23 10:15 12/05/23 09:00 Method Batch Dilution Preparation Analysis Analyst Location date/time date/time Volatile Organic Compounds (GC/MS) by Method 8260D WG2186772 1 12/11/23 01:53 12/11/23 01:53 ACG Mt. Juliet, TN Volatile Organic Compounds (GC/MS) by Method 8260D WG2187274 20 12/12/23 01:59 12/12/23 01:59 JBE Mt. Juliet, TN 1 Cp 2Tc 3Ss 4Cn 5Sr 6Qc 7Gl 8Al 9Sc ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE: ATC Group Services LLC L1684381 12/12/23 16:54 3 of 29 ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE: ATC Group Services LLC L1684381 12/14/23 00:11 3 of 29 CASE NARRATIVE All sample aliquots were received at the correct temperature, in the proper containers, with the appropriate preservatives, and within method specified holding times, unless qualified or notated within the report. Where applicable, all MDL (LOD) and RDL (LOQ) values reported for environmental samples have been corrected for the dilution factor used in the analysis. All Method and Batch Quality Control are within established criteria except where addressed in this case narrative, a non-conformance form or properly qualified within the sample results. By my digital signature below, I affirm to the best of my knowledge, all problems/anomalies observed by the laboratory as having the potential to affect the quality of the data have been identified by the laboratory, and no information or data have been knowingly withheld that would affect the quality of the data. [Preliminary Report] Heather J Wagner Project Manager 1 Cp 2Tc 3Ss 4Cn 5Sr 6Qc 7Gl 8Al 9Sc ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE: ATC Group Services LLC L1684381 12/12/23 16:54 4 of 29 Heather J Wagner Project Manager ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE: ATC Group Services LLC L1684381 12/14/23 00:11 4 of 29 SAMPLE RESULTS - 01 L1684381 MW-5 Collected date/time: 11/29/23 15:55 Volatile Organic Compounds (GC/MS) by Method 8260D Result Qualifier MDL RDL Dilution Analysis Batch Analyte ug/l ug/l ug/l date / time Acetone U C3 11.3 25.0 1 12/11/2023 00:34 WG2186772 Acrylonitrile U 0.671 5.00 1 12/11/2023 00:34 WG2186772 Benzene U 0.0941 0.500 1 12/11/2023 00:34 WG2186772 Bromobenzene U 0.118 0.500 1 12/11/2023 00:34 WG2186772 Bromodichloromethane U 0.136 0.500 1 12/11/2023 00:34 WG2186772 Bromochloromethane U 0.128 0.500 1 12/11/2023 00:34 WG2186772 Bromoform U 0.129 0.500 1 12/11/2023 00:34 WG2186772 Bromomethane U 0.605 2.50 1 12/11/2023 00:34 WG2186772 n-Butylbenzene U 0.157 0.500 1 12/11/2023 00:34 WG2186772 sec-Butylbenzene U 0.125 0.500 1 12/11/2023 00:34 WG2186772 tert-Butylbenzene U 0.127 0.500 1 12/11/2023 00:34 WG2186772 Carbon disulfide U 0.0962 0.500 1 12/11/2023 00:34 WG2186772 Carbon tetrachloride U 0.128 0.500 1 12/11/2023 00:34 WG2186772 Chlorobenzene U 0.117 0.500 1 12/11/2023 00:34 WG2186772 Chlorodibromomethane U 0.140 0.500 1 12/11/2023 00:34 WG2186772 Chloroethane U C3 0.192 2.50 1 12/11/2023 00:34 WG2186772 Chloroform U 0.111 0.500 1 12/11/2023 00:34 WG2186772 Chloromethane U 0.960 1.25 1 12/11/2023 00:34 WG2186772 2-Chlorotoluene U 0.106 0.500 1 12/11/2023 00:34 WG2186772 4-Chlorotoluene U 0.114 0.500 1 12/11/2023 00:34 WG2186772 1,2-Dibromo-3-Chloropropane U 0.276 2.50 1 12/11/2023 00:34 WG2186772 1,2-Dibromoethane U 0.126 0.500 1 12/11/2023 00:34 WG2186772 Dibromomethane U 0.122 0.500 1 12/11/2023 00:34 WG2186772 1,2-Dichlorobenzene U 0.107 0.500 1 12/11/2023 00:34 WG2186772 1,3-Dichlorobenzene U 0.299 0.500 1 12/11/2023 00:34 WG2186772 1,4-Dichlorobenzene U 0.120 0.500 1 12/11/2023 00:34 WG2186772 Dichlorodifluoromethane U 0.374 2.50 1 12/11/2023 00:34 WG2186772 1,1-Dichloroethane U 0.100 0.500 1 12/11/2023 00:34 WG2186772 1,2-Dichloroethane U 0.0819 0.500 1 12/11/2023 00:34 WG2186772 1,1-Dichloroethene U 0.188 0.500 1 12/11/2023 00:34 WG2186772 cis-1,2-Dichloroethene U 0.126 0.500 1 12/11/2023 00:34 WG2186772 trans-1,2-Dichloroethene U 0.149 0.500 1 12/11/2023 00:34 WG2186772 1,2-Dichloropropane U 0.149 0.500 1 12/11/2023 00:34 WG2186772 1,1-Dichloropropene U 0.142 0.500 1 12/11/2023 00:34 WG2186772 1,3-Dichloropropane U 0.109 1.00 1 12/11/2023 00:34 WG2186772 cis-1,3-Dichloropropene U 0.111 0.500 1 12/11/2023 00:34 WG2186772 trans-1,3-Dichloropropene U 0.118 0.500 1 12/11/2023 00:34 WG2186772 trans-1,4-Dichloro-2-butene U C3 0.467 5.00 1 12/11/2023 00:34 WG2186772 2,2-Dichloropropane U 0.161 0.500 1 12/11/2023 00:34 WG2186772 Di-isopropyl ether U 0.105 0.500 1 12/11/2023 00:34 WG2186772 Ethylbenzene U 0.137 0.500 1 12/11/2023 00:34 WG2186772 Hexachloro-1,3-butadiene U J4 0.337 1.00 1 12/11/2023 00:34 WG2186772 2-Hexanone U 0.787 5.00 1 12/11/2023 00:34 WG2186772 n-Hexane U 0.749 5.00 1 12/11/2023 00:34 WG2186772 Iodomethane U 0.554 5.00 1 12/11/2023 00:34 WG2186772 Isopropylbenzene U 0.105 0.500 1 12/11/2023 00:34 WG2186772 p-Isopropyltoluene U 0.120 0.500 1 12/11/2023 00:34 WG2186772 2-Butanone (MEK)U 1.19 5.00 1 12/11/2023 00:34 WG2186772 Methylene Chloride U 0.430 2.50 1 12/11/2023 00:34 WG2186772 4-Methyl-2-pentanone (MIBK)U 0.478 5.00 1 12/11/2023 00:34 WG2186772 Methyl tert-butyl ether U 0.101 0.500 1 12/11/2023 00:34 WG2186772 Naphthalene U 0.174 2.50 1 12/11/2023 00:34 WG2186772 n-Propylbenzene U 0.0993 0.500 1 12/11/2023 00:34 WG2186772 Styrene U 0.118 0.500 1 12/11/2023 00:34 WG2186772 1,1,1,2-Tetrachloroethane U 0.147 0.500 1 12/11/2023 00:34 WG2186772 1,1,2,2-Tetrachloroethane U 0.133 0.500 1 12/11/2023 00:34 WG2186772 1 Cp 2Tc 3Ss 4Cn 5Sr 6Qc 7Gl 8Al 9Sc ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE: ATC Group Services LLC L1684381 12/12/23 16:54 5 of 29 ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE: ATC Group Services LLC L1684381 12/14/23 00:11 5 of 29 SAMPLE RESULTS - 01 L1684381 MW-5 Collected date/time: 11/29/23 15:55 Volatile Organic Compounds (GC/MS) by Method 8260D Result Qualifier MDL RDL Dilution Analysis Batch Analyte ug/l ug/l ug/l date / time 1,1,2-Trichlorotrifluoroethane U 0.180 0.500 1 12/11/2023 00:34 WG2186772 Tetrachloroethene U 0.300 0.500 1 12/11/2023 00:34 WG2186772 Toluene U 0.278 0.500 1 12/11/2023 00:34 WG2186772 1,2,3-Trichlorobenzene U 0.164 0.500 1 12/11/2023 00:34 WG2186772 1,2,4-Trichlorobenzene U 0.481 1.00 1 12/11/2023 00:34 WG2186772 1,1,1-Trichloroethane U 0.149 0.500 1 12/11/2023 00:34 WG2186772 1,1,2-Trichloroethane U 0.158 0.500 1 12/11/2023 00:34 WG2186772 Trichloroethene U 0.190 0.500 1 12/11/2023 00:34 WG2186772 Trichlorofluoromethane U 0.160 2.50 1 12/11/2023 00:34 WG2186772 1,2,3-Trichloropropane U 0.237 2.50 1 12/11/2023 00:34 WG2186772 1,2,4-Trimethylbenzene U 0.322 0.500 1 12/11/2023 00:34 WG2186772 1,2,3-Trimethylbenzene U 0.104 0.500 1 12/11/2023 00:34 WG2186772 1,3,5-Trimethylbenzene U 0.104 0.500 1 12/11/2023 00:34 WG2186772 Vinyl acetate U 0.692 5.00 1 12/11/2023 00:34 WG2186772 Vinyl chloride U C3 0.234 0.500 1 12/11/2023 00:34 WG2186772 Xylenes, Total U 0.174 1.50 1 12/11/2023 00:34 WG2186772 (S) Toluene-d8 106 80.0-120 12/11/2023 00:34 WG2186772 (S) 4-Bromofluorobenzene 102 77.0-126 12/11/2023 00:34 WG2186772 (S) 1,2-Dichloroethane-d4 90.3 70.0-130 12/11/2023 00:34 WG2186772 1 Cp 2Tc 3Ss 4Cn 5Sr 6Qc 7Gl 8Al 9Sc ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE: ATC Group Services LLC L1684381 12/12/23 16:54 6 of 29 ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE: ATC Group Services LLC L1684381 12/14/23 00:11 6 of 29 SAMPLE RESULTS - 02 L1684381 MW-6 Collected date/time: 11/29/23 16:20 Volatile Organic Compounds (GC/MS) by Method 8260D Result Qualifier MDL RDL Dilution Analysis Batch Analyte ug/l ug/l ug/l date / time Acetone U C3 11.3 25.0 1 12/11/2023 00:53 WG2186772 Acrylonitrile U 0.671 5.00 1 12/11/2023 00:53 WG2186772 Benzene U 0.0941 0.500 1 12/11/2023 00:53 WG2186772 Bromobenzene U 0.118 0.500 1 12/11/2023 00:53 WG2186772 Bromodichloromethane U 0.136 0.500 1 12/11/2023 00:53 WG2186772 Bromochloromethane U 0.128 0.500 1 12/11/2023 00:53 WG2186772 Bromoform U 0.129 0.500 1 12/11/2023 00:53 WG2186772 Bromomethane U 0.605 2.50 1 12/11/2023 00:53 WG2186772 n-Butylbenzene U 0.157 0.500 1 12/11/2023 00:53 WG2186772 sec-Butylbenzene U 0.125 0.500 1 12/11/2023 00:53 WG2186772 tert-Butylbenzene U 0.127 0.500 1 12/11/2023 00:53 WG2186772 Carbon disulfide U 0.0962 0.500 1 12/11/2023 00:53 WG2186772 Carbon tetrachloride U 0.128 0.500 1 12/11/2023 00:53 WG2186772 Chlorobenzene U 0.117 0.500 1 12/11/2023 00:53 WG2186772 Chlorodibromomethane U 0.140 0.500 1 12/11/2023 00:53 WG2186772 Chloroethane U C3 0.192 2.50 1 12/11/2023 00:53 WG2186772 Chloroform U 0.111 0.500 1 12/11/2023 00:53 WG2186772 Chloromethane U 0.960 1.25 1 12/11/2023 00:53 WG2186772 2-Chlorotoluene U 0.106 0.500 1 12/11/2023 00:53 WG2186772 4-Chlorotoluene U 0.114 0.500 1 12/11/2023 00:53 WG2186772 1,2-Dibromo-3-Chloropropane U 0.276 2.50 1 12/11/2023 00:53 WG2186772 1,2-Dibromoethane U 0.126 0.500 1 12/11/2023 00:53 WG2186772 Dibromomethane U 0.122 0.500 1 12/11/2023 00:53 WG2186772 1,2-Dichlorobenzene U 0.107 0.500 1 12/11/2023 00:53 WG2186772 1,3-Dichlorobenzene U 0.299 0.500 1 12/11/2023 00:53 WG2186772 1,4-Dichlorobenzene U 0.120 0.500 1 12/11/2023 00:53 WG2186772 Dichlorodifluoromethane U 0.374 2.50 1 12/11/2023 00:53 WG2186772 1,1-Dichloroethane U 0.100 0.500 1 12/11/2023 00:53 WG2186772 1,2-Dichloroethane U 0.0819 0.500 1 12/11/2023 00:53 WG2186772 1,1-Dichloroethene U 0.188 0.500 1 12/11/2023 00:53 WG2186772 cis-1,2-Dichloroethene 1.04 0.126 0.500 1 12/11/2023 00:53 WG2186772 trans-1,2-Dichloroethene U 0.149 0.500 1 12/11/2023 00:53 WG2186772 1,2-Dichloropropane U 0.149 0.500 1 12/11/2023 00:53 WG2186772 1,1-Dichloropropene U 0.142 0.500 1 12/11/2023 00:53 WG2186772 1,3-Dichloropropane U 0.109 1.00 1 12/11/2023 00:53 WG2186772 cis-1,3-Dichloropropene U 0.111 0.500 1 12/11/2023 00:53 WG2186772 trans-1,3-Dichloropropene U 0.118 0.500 1 12/11/2023 00:53 WG2186772 trans-1,4-Dichloro-2-butene U C3 0.467 5.00 1 12/11/2023 00:53 WG2186772 2,2-Dichloropropane U 0.161 0.500 1 12/11/2023 00:53 WG2186772 Di-isopropyl ether 6.53 0.105 0.500 1 12/11/2023 00:53 WG2186772 Ethylbenzene U 0.137 0.500 1 12/11/2023 00:53 WG2186772 Hexachloro-1,3-butadiene U J4 0.337 1.00 1 12/11/2023 00:53 WG2186772 2-Hexanone U 0.787 5.00 1 12/11/2023 00:53 WG2186772 n-Hexane U 0.749 5.00 1 12/11/2023 00:53 WG2186772 Iodomethane U 0.554 5.00 1 12/11/2023 00:53 WG2186772 Isopropylbenzene U 0.105 0.500 1 12/11/2023 00:53 WG2186772 p-Isopropyltoluene U 0.120 0.500 1 12/11/2023 00:53 WG2186772 2-Butanone (MEK)U 1.19 5.00 1 12/11/2023 00:53 WG2186772 Methylene Chloride U 0.430 2.50 1 12/11/2023 00:53 WG2186772 4-Methyl-2-pentanone (MIBK)U 0.478 5.00 1 12/11/2023 00:53 WG2186772 Methyl tert-butyl ether U 0.101 0.500 1 12/11/2023 00:53 WG2186772 Naphthalene U 0.174 2.50 1 12/11/2023 00:53 WG2186772 n-Propylbenzene U 0.0993 0.500 1 12/11/2023 00:53 WG2186772 Styrene U 0.118 0.500 1 12/11/2023 00:53 WG2186772 1,1,1,2-Tetrachloroethane U 0.147 0.500 1 12/11/2023 00:53 WG2186772 1,1,2,2-Tetrachloroethane U 0.133 0.500 1 12/11/2023 00:53 WG2186772 1 Cp 2Tc 3Ss 4Cn 5Sr 6Qc 7Gl 8Al 9Sc ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE: ATC Group Services LLC L1684381 12/12/23 16:54 7 of 29 ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE: ATC Group Services LLC L1684381 12/14/23 00:11 7 of 29 SAMPLE RESULTS - 02 L1684381 MW-6 Collected date/time: 11/29/23 16:20 Volatile Organic Compounds (GC/MS) by Method 8260D Result Qualifier MDL RDL Dilution Analysis Batch Analyte ug/l ug/l ug/l date / time 1,1,2-Trichlorotrifluoroethane U 0.180 0.500 1 12/11/2023 00:53 WG2186772 Tetrachloroethene U 0.300 0.500 1 12/11/2023 00:53 WG2186772 Toluene U 0.278 0.500 1 12/11/2023 00:53 WG2186772 1,2,3-Trichlorobenzene U 0.164 0.500 1 12/11/2023 00:53 WG2186772 1,2,4-Trichlorobenzene U 0.481 1.00 1 12/11/2023 00:53 WG2186772 1,1,1-Trichloroethane U 0.149 0.500 1 12/11/2023 00:53 WG2186772 1,1,2-Trichloroethane U 0.158 0.500 1 12/11/2023 00:53 WG2186772 Trichloroethene U 0.190 0.500 1 12/11/2023 00:53 WG2186772 Trichlorofluoromethane U 0.160 2.50 1 12/11/2023 00:53 WG2186772 1,2,3-Trichloropropane U 0.237 2.50 1 12/11/2023 00:53 WG2186772 1,2,4-Trimethylbenzene U 0.322 0.500 1 12/11/2023 00:53 WG2186772 1,2,3-Trimethylbenzene U 0.104 0.500 1 12/11/2023 00:53 WG2186772 1,3,5-Trimethylbenzene U 0.104 0.500 1 12/11/2023 00:53 WG2186772 Vinyl acetate U 0.692 5.00 1 12/11/2023 00:53 WG2186772 Vinyl chloride U C3 0.234 0.500 1 12/11/2023 00:53 WG2186772 Xylenes, Total U 0.174 1.50 1 12/11/2023 00:53 WG2186772 (S) Toluene-d8 106 80.0-120 12/11/2023 00:53 WG2186772 (S) 4-Bromofluorobenzene 99.0 77.0-126 12/11/2023 00:53 WG2186772 (S) 1,2-Dichloroethane-d4 85.1 70.0-130 12/11/2023 00:53 WG2186772 1 Cp 2Tc 3Ss 4Cn 5Sr 6Qc 7Gl 8Al 9Sc ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE: ATC Group Services LLC L1684381 12/12/23 16:54 8 of 29 ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE: ATC Group Services LLC L1684381 12/14/23 00:11 8 of 29 SAMPLE RESULTS - 03 L1684381 MW-7 Collected date/time: 11/29/23 15:15 Volatile Organic Compounds (GC/MS) by Method 8260D Result Qualifier MDL RDL Dilution Analysis Batch Analyte ug/l ug/l ug/l date / time Acetone U C3 11.3 25.0 1 12/11/2023 01:13 WG2186772 Acrylonitrile U 0.671 5.00 1 12/11/2023 01:13 WG2186772 Benzene U 0.0941 0.500 1 12/11/2023 01:13 WG2186772 Bromobenzene U 0.118 0.500 1 12/11/2023 01:13 WG2186772 Bromodichloromethane U 0.136 0.500 1 12/11/2023 01:13 WG2186772 Bromochloromethane U 0.128 0.500 1 12/11/2023 01:13 WG2186772 Bromoform U 0.129 0.500 1 12/11/2023 01:13 WG2186772 Bromomethane U 0.605 2.50 1 12/11/2023 01:13 WG2186772 n-Butylbenzene U 0.157 0.500 1 12/11/2023 01:13 WG2186772 sec-Butylbenzene U 0.125 0.500 1 12/11/2023 01:13 WG2186772 tert-Butylbenzene U 0.127 0.500 1 12/11/2023 01:13 WG2186772 Carbon disulfide U 0.0962 0.500 1 12/11/2023 01:13 WG2186772 Carbon tetrachloride U 0.128 0.500 1 12/11/2023 01:13 WG2186772 Chlorobenzene U 0.117 0.500 1 12/11/2023 01:13 WG2186772 Chlorodibromomethane U 0.140 0.500 1 12/11/2023 01:13 WG2186772 Chloroethane U C3 0.192 2.50 1 12/11/2023 01:13 WG2186772 Chloroform U 0.111 0.500 1 12/11/2023 01:13 WG2186772 Chloromethane U 0.960 1.25 1 12/11/2023 01:13 WG2186772 2-Chlorotoluene U 0.106 0.500 1 12/11/2023 01:13 WG2186772 4-Chlorotoluene U 0.114 0.500 1 12/11/2023 01:13 WG2186772 1,2-Dibromo-3-Chloropropane U 0.276 2.50 1 12/11/2023 01:13 WG2186772 1,2-Dibromoethane U 0.126 0.500 1 12/11/2023 01:13 WG2186772 Dibromomethane U 0.122 0.500 1 12/11/2023 01:13 WG2186772 1,2-Dichlorobenzene U 0.107 0.500 1 12/11/2023 01:13 WG2186772 1,3-Dichlorobenzene U 0.299 0.500 1 12/11/2023 01:13 WG2186772 1,4-Dichlorobenzene U 0.120 0.500 1 12/11/2023 01:13 WG2186772 Dichlorodifluoromethane U 0.374 2.50 1 12/11/2023 01:13 WG2186772 1,1-Dichloroethane U 0.100 0.500 1 12/11/2023 01:13 WG2186772 1,2-Dichloroethane U 0.0819 0.500 1 12/11/2023 01:13 WG2186772 1,1-Dichloroethene U 0.188 0.500 1 12/11/2023 01:13 WG2186772 cis-1,2-Dichloroethene U 0.126 0.500 1 12/11/2023 01:13 WG2186772 trans-1,2-Dichloroethene U 0.149 0.500 1 12/11/2023 01:13 WG2186772 1,2-Dichloropropane U 0.149 0.500 1 12/11/2023 01:13 WG2186772 1,1-Dichloropropene U 0.142 0.500 1 12/11/2023 01:13 WG2186772 1,3-Dichloropropane U 0.109 1.00 1 12/11/2023 01:13 WG2186772 cis-1,3-Dichloropropene U 0.111 0.500 1 12/11/2023 01:13 WG2186772 trans-1,3-Dichloropropene U 0.118 0.500 1 12/11/2023 01:13 WG2186772 trans-1,4-Dichloro-2-butene U C3 0.467 5.00 1 12/11/2023 01:13 WG2186772 2,2-Dichloropropane U 0.161 0.500 1 12/11/2023 01:13 WG2186772 Di-isopropyl ether U 0.105 0.500 1 12/11/2023 01:13 WG2186772 Ethylbenzene U 0.137 0.500 1 12/11/2023 01:13 WG2186772 Hexachloro-1,3-butadiene U J4 0.337 1.00 1 12/11/2023 01:13 WG2186772 2-Hexanone U 0.787 5.00 1 12/11/2023 01:13 WG2186772 n-Hexane U 0.749 5.00 1 12/11/2023 01:13 WG2186772 Iodomethane U 0.554 5.00 1 12/11/2023 01:13 WG2186772 Isopropylbenzene U 0.105 0.500 1 12/11/2023 01:13 WG2186772 p-Isopropyltoluene U 0.120 0.500 1 12/11/2023 01:13 WG2186772 2-Butanone (MEK)U 1.19 5.00 1 12/11/2023 01:13 WG2186772 Methylene Chloride U 0.430 2.50 1 12/11/2023 01:13 WG2186772 4-Methyl-2-pentanone (MIBK)U 0.478 5.00 1 12/11/2023 01:13 WG2186772 Methyl tert-butyl ether U 0.101 0.500 1 12/11/2023 01:13 WG2186772 Naphthalene U 0.174 2.50 1 12/11/2023 01:13 WG2186772 n-Propylbenzene U 0.0993 0.500 1 12/11/2023 01:13 WG2186772 Styrene U 0.118 0.500 1 12/11/2023 01:13 WG2186772 1,1,1,2-Tetrachloroethane U 0.147 0.500 1 12/11/2023 01:13 WG2186772 1,1,2,2-Tetrachloroethane U 0.133 0.500 1 12/11/2023 01:13 WG2186772 1 Cp 2Tc 3Ss 4Cn 5Sr 6Qc 7Gl 8Al 9Sc ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE: ATC Group Services LLC L1684381 12/12/23 16:54 9 of 29 ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE: ATC Group Services LLC L1684381 12/14/23 00:11 9 of 29 SAMPLE RESULTS - 03 L1684381 MW-7 Collected date/time: 11/29/23 15:15 Volatile Organic Compounds (GC/MS) by Method 8260D Result Qualifier MDL RDL Dilution Analysis Batch Analyte ug/l ug/l ug/l date / time 1,1,2-Trichlorotrifluoroethane U 0.180 0.500 1 12/11/2023 01:13 WG2186772 Tetrachloroethene 1.03 0.300 0.500 1 12/11/2023 01:13 WG2186772 Toluene U 0.278 0.500 1 12/11/2023 01:13 WG2186772 1,2,3-Trichlorobenzene U 0.164 0.500 1 12/11/2023 01:13 WG2186772 1,2,4-Trichlorobenzene U 0.481 1.00 1 12/11/2023 01:13 WG2186772 1,1,1-Trichloroethane U 0.149 0.500 1 12/11/2023 01:13 WG2186772 1,1,2-Trichloroethane U 0.158 0.500 1 12/11/2023 01:13 WG2186772 Trichloroethene U 0.190 0.500 1 12/11/2023 01:13 WG2186772 Trichlorofluoromethane U 0.160 2.50 1 12/11/2023 01:13 WG2186772 1,2,3-Trichloropropane U 0.237 2.50 1 12/11/2023 01:13 WG2186772 1,2,4-Trimethylbenzene U 0.322 0.500 1 12/11/2023 01:13 WG2186772 1,2,3-Trimethylbenzene U 0.104 0.500 1 12/11/2023 01:13 WG2186772 1,3,5-Trimethylbenzene U 0.104 0.500 1 12/11/2023 01:13 WG2186772 Vinyl acetate U 0.692 5.00 1 12/11/2023 01:13 WG2186772 Vinyl chloride U C3 0.234 0.500 1 12/11/2023 01:13 WG2186772 Xylenes, Total U 0.174 1.50 1 12/11/2023 01:13 WG2186772 (S) Toluene-d8 107 80.0-120 12/11/2023 01:13 WG2186772 (S) 4-Bromofluorobenzene 99.9 77.0-126 12/11/2023 01:13 WG2186772 (S) 1,2-Dichloroethane-d4 89.7 70.0-130 12/11/2023 01:13 WG2186772 1 Cp 2Tc 3Ss 4Cn 5Sr 6Qc 7Gl 8Al 9Sc ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE: ATC Group Services LLC L1684381 12/12/23 16:54 10 of 29 ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE: ATC Group Services LLC L1684381 12/14/23 00:11 10 of 29 SAMPLE RESULTS - 04 L1684381 MW-8 Collected date/time: 11/30/23 09:40 Volatile Organic Compounds (GC/MS) by Method 8260D Result Qualifier MDL RDL Dilution Analysis Batch Analyte ug/l ug/l ug/l date / time Acetone U 56.5 125 5 12/12/2023 01:21 WG2187274 Acrylonitrile U 3.36 25.0 5 12/12/2023 01:21 WG2187274 Benzene U 0.471 2.50 5 12/12/2023 01:21 WG2187274 Bromobenzene U 0.590 2.50 5 12/12/2023 01:21 WG2187274 Bromodichloromethane U 0.680 2.50 5 12/12/2023 01:21 WG2187274 Bromochloromethane U 0.640 2.50 5 12/12/2023 01:21 WG2187274 Bromoform U 0.645 2.50 5 12/12/2023 01:21 WG2187274 Bromomethane U 3.03 12.5 5 12/12/2023 01:21 WG2187274 n-Butylbenzene U 0.785 2.50 5 12/12/2023 01:21 WG2187274 sec-Butylbenzene U 0.625 2.50 5 12/12/2023 01:21 WG2187274 tert-Butylbenzene U 0.635 2.50 5 12/12/2023 01:21 WG2187274 Carbon disulfide U 0.481 2.50 5 12/12/2023 01:21 WG2187274 Carbon tetrachloride U 0.640 2.50 5 12/12/2023 01:21 WG2187274 Chlorobenzene U 0.585 2.50 5 12/12/2023 01:21 WG2187274 Chlorodibromomethane U 0.700 2.50 5 12/12/2023 01:21 WG2187274 Chloroethane U C3 0.960 12.5 5 12/12/2023 01:21 WG2187274 Chloroform U 0.555 2.50 5 12/12/2023 01:21 WG2187274 Chloromethane U 4.80 6.25 5 12/12/2023 01:21 WG2187274 2-Chlorotoluene U 0.530 2.50 5 12/12/2023 01:21 WG2187274 4-Chlorotoluene U 0.570 2.50 5 12/12/2023 01:21 WG2187274 1,2-Dibromo-3-Chloropropane U 1.38 12.5 5 12/12/2023 01:21 WG2187274 1,2-Dibromoethane U 0.630 2.50 5 12/12/2023 01:21 WG2187274 Dibromomethane U 0.610 2.50 5 12/12/2023 01:21 WG2187274 1,2-Dichlorobenzene U 0.535 2.50 5 12/12/2023 01:21 WG2187274 1,3-Dichlorobenzene U 1.49 2.50 5 12/12/2023 01:21 WG2187274 1,4-Dichlorobenzene U 0.600 2.50 5 12/12/2023 01:21 WG2187274 Dichlorodifluoromethane U C3 1.87 12.5 5 12/12/2023 01:21 WG2187274 1,1-Dichloroethane U 0.500 2.50 5 12/12/2023 01:21 WG2187274 1,2-Dichloroethane U 0.409 2.50 5 12/12/2023 01:21 WG2187274 1,1-Dichloroethene U 0.940 2.50 5 12/12/2023 01:21 WG2187274 cis-1,2-Dichloroethene U 0.630 2.50 5 12/12/2023 01:21 WG2187274 trans-1,2-Dichloroethene U 0.745 2.50 5 12/12/2023 01:21 WG2187274 1,2-Dichloropropane U 0.745 2.50 5 12/12/2023 01:21 WG2187274 1,1-Dichloropropene U 0.710 2.50 5 12/12/2023 01:21 WG2187274 1,3-Dichloropropane U 0.545 5.00 5 12/12/2023 01:21 WG2187274 cis-1,3-Dichloropropene U 0.555 2.50 5 12/12/2023 01:21 WG2187274 trans-1,3-Dichloropropene U 0.590 2.50 5 12/12/2023 01:21 WG2187274 trans-1,4-Dichloro-2-butene U 2.34 25.0 5 12/12/2023 01:21 WG2187274 2,2-Dichloropropane U 0.805 2.50 5 12/12/2023 01:21 WG2187274 Di-isopropyl ether U 0.525 2.50 5 12/12/2023 01:21 WG2187274 Ethylbenzene 0.960 J 0.685 2.50 5 12/12/2023 01:21 WG2187274 Hexachloro-1,3-butadiene U 1.69 5.00 5 12/12/2023 01:21 WG2187274 2-Hexanone U 3.94 25.0 5 12/12/2023 01:21 WG2187274 n-Hexane U C3 3.74 25.0 5 12/12/2023 01:21 WG2187274 Iodomethane U 2.77 25.0 5 12/12/2023 01:21 WG2187274 Isopropylbenzene U 0.525 2.50 5 12/12/2023 01:21 WG2187274 p-Isopropyltoluene U 0.600 2.50 5 12/12/2023 01:21 WG2187274 2-Butanone (MEK)U 5.95 25.0 5 12/12/2023 01:21 WG2187274 Methylene Chloride U 2.15 12.5 5 12/12/2023 01:21 WG2187274 4-Methyl-2-pentanone (MIBK)U 2.39 25.0 5 12/12/2023 01:21 WG2187274 Methyl tert-butyl ether U 0.505 2.50 5 12/12/2023 01:21 WG2187274 Naphthalene 19.5 0.870 12.5 5 12/12/2023 01:21 WG2187274 n-Propylbenzene 1.58 J 0.497 2.50 5 12/12/2023 01:21 WG2187274 Styrene U 0.590 2.50 5 12/12/2023 01:21 WG2187274 1,1,1,2-Tetrachloroethane U 0.735 2.50 5 12/12/2023 01:21 WG2187274 1,1,2,2-Tetrachloroethane U 0.665 2.50 5 12/12/2023 01:21 WG2187274 1 Cp 2Tc 3Ss 4Cn 5Sr 6Qc 7Gl 8Al 9Sc ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE: ATC Group Services LLC L1684381 12/12/23 16:54 11 of 29 ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE: ATC Group Services LLC L1684381 12/14/23 00:11 11 of 29 SAMPLE RESULTS - 04 L1684381 MW-8 Collected date/time: 11/30/23 09:40 Volatile Organic Compounds (GC/MS) by Method 8260D Result Qualifier MDL RDL Dilution Analysis Batch Analyte ug/l ug/l ug/l date / time 1,1,2-Trichlorotrifluoroethane U C3 0.900 2.50 5 12/12/2023 01:21 WG2187274 Tetrachloroethene 77.2 1.50 2.50 5 12/12/2023 01:21 WG2187274 Toluene U 1.39 2.50 5 12/12/2023 01:21 WG2187274 1,2,3-Trichlorobenzene U 0.820 2.50 5 12/12/2023 01:21 WG2187274 1,2,4-Trichlorobenzene U 2.41 5.00 5 12/12/2023 01:21 WG2187274 1,1,1-Trichloroethane U 0.745 2.50 5 12/12/2023 01:21 WG2187274 1,1,2-Trichloroethane U 0.790 2.50 5 12/12/2023 01:21 WG2187274 Trichloroethene U 0.950 2.50 5 12/12/2023 01:21 WG2187274 Trichlorofluoromethane U 0.800 12.5 5 12/12/2023 01:21 WG2187274 1,2,3-Trichloropropane U 1.19 12.5 5 12/12/2023 01:21 WG2187274 1,2,4-Trimethylbenzene U 1.61 2.50 5 12/12/2023 01:21 WG2187274 1,2,3-Trimethylbenzene 0.865 J 0.520 2.50 5 12/12/2023 01:21 WG2187274 1,3,5-Trimethylbenzene U 0.520 2.50 5 12/12/2023 01:21 WG2187274 Vinyl acetate U 3.46 25.0 5 12/12/2023 01:21 WG2187274 Vinyl chloride U 1.17 2.50 5 12/12/2023 01:21 WG2187274 Xylenes, Total U 0.870 7.50 5 12/12/2023 01:21 WG2187274 (S) Toluene-d8 110 80.0-120 12/12/2023 01:21 WG2187274 (S) 4-Bromofluorobenzene 101 77.0-126 12/12/2023 01:21 WG2187274 (S) 1,2-Dichloroethane-d4 93.1 70.0-130 12/12/2023 01:21 WG2187274 1 Cp 2Tc 3Ss 4Cn 5Sr 6Qc 7Gl 8Al 9Sc ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE: ATC Group Services LLC L1684381 12/12/23 16:54 12 of 29 ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE: ATC Group Services LLC L1684381 12/14/23 00:11 12 of 29 SAMPLE RESULTS - 05 L1684381 MW-9 Collected date/time: 11/30/23 11:07 Volatile Organic Compounds (GC/MS) by Method 8260D Result Qualifier MDL RDL Dilution Analysis Batch Analyte ug/l ug/l ug/l date / time Acetone U C3 11300 25000 1000 12/11/2023 04:51 WG2186772 Acrylonitrile U 671 5000 1000 12/11/2023 04:51 WG2186772 Benzene U 94.1 500 1000 12/11/2023 04:51 WG2186772 Bromobenzene U 118 500 1000 12/11/2023 04:51 WG2186772 Bromodichloromethane U 136 500 1000 12/11/2023 04:51 WG2186772 Bromochloromethane U 128 500 1000 12/11/2023 04:51 WG2186772 Bromoform U 129 500 1000 12/11/2023 04:51 WG2186772 Bromomethane U 605 2500 1000 12/11/2023 04:51 WG2186772 n-Butylbenzene U 157 500 1000 12/11/2023 04:51 WG2186772 sec-Butylbenzene U 125 500 1000 12/11/2023 04:51 WG2186772 tert-Butylbenzene U 127 500 1000 12/11/2023 04:51 WG2186772 Carbon disulfide U 96.2 500 1000 12/11/2023 04:51 WG2186772 Carbon tetrachloride U 128 500 1000 12/11/2023 04:51 WG2186772 Chlorobenzene U 117 500 1000 12/11/2023 04:51 WG2186772 Chlorodibromomethane U 140 500 1000 12/11/2023 04:51 WG2186772 Chloroethane U C3 192 2500 1000 12/11/2023 04:51 WG2186772 Chloroform U 111 500 1000 12/11/2023 04:51 WG2186772 Chloromethane U 960 1250 1000 12/11/2023 04:51 WG2186772 2-Chlorotoluene U 106 500 1000 12/11/2023 04:51 WG2186772 4-Chlorotoluene U 114 500 1000 12/11/2023 04:51 WG2186772 1,2-Dibromo-3-Chloropropane U 276 2500 1000 12/11/2023 04:51 WG2186772 1,2-Dibromoethane U 126 500 1000 12/11/2023 04:51 WG2186772 Dibromomethane U 122 500 1000 12/11/2023 04:51 WG2186772 1,2-Dichlorobenzene U 107 500 1000 12/11/2023 04:51 WG2186772 1,3-Dichlorobenzene U 299 500 1000 12/11/2023 04:51 WG2186772 1,4-Dichlorobenzene U 120 500 1000 12/11/2023 04:51 WG2186772 Dichlorodifluoromethane U 374 2500 1000 12/11/2023 04:51 WG2186772 1,1-Dichloroethane U 100 500 1000 12/11/2023 04:51 WG2186772 1,2-Dichloroethane U 81.9 500 1000 12/11/2023 04:51 WG2186772 1,1-Dichloroethene U 188 500 1000 12/11/2023 04:51 WG2186772 cis-1,2-Dichloroethene 799 126 500 1000 12/11/2023 04:51 WG2186772 trans-1,2-Dichloroethene U 149 500 1000 12/11/2023 04:51 WG2186772 1,2-Dichloropropane U 149 500 1000 12/11/2023 04:51 WG2186772 1,1-Dichloropropene U 142 500 1000 12/11/2023 04:51 WG2186772 1,3-Dichloropropane U 109 1000 1000 12/11/2023 04:51 WG2186772 cis-1,3-Dichloropropene U 111 500 1000 12/11/2023 04:51 WG2186772 trans-1,3-Dichloropropene U 118 500 1000 12/11/2023 04:51 WG2186772 trans-1,4-Dichloro-2-butene U C3 467 5000 1000 12/11/2023 04:51 WG2186772 2,2-Dichloropropane U 161 500 1000 12/11/2023 04:51 WG2186772 Di-isopropyl ether U 105 500 1000 12/11/2023 04:51 WG2186772 Ethylbenzene U 137 500 1000 12/11/2023 04:51 WG2186772 Hexachloro-1,3-butadiene U J4 337 1000 1000 12/11/2023 04:51 WG2186772 2-Hexanone U 787 5000 1000 12/11/2023 04:51 WG2186772 n-Hexane U 749 5000 1000 12/11/2023 04:51 WG2186772 Iodomethane U 554 5000 1000 12/11/2023 04:51 WG2186772 Isopropylbenzene U 105 500 1000 12/11/2023 04:51 WG2186772 p-Isopropyltoluene U 120 500 1000 12/11/2023 04:51 WG2186772 2-Butanone (MEK)U 1190 5000 1000 12/11/2023 04:51 WG2186772 Methylene Chloride U 430 2500 1000 12/11/2023 04:51 WG2186772 4-Methyl-2-pentanone (MIBK)U 478 5000 1000 12/11/2023 04:51 WG2186772 Methyl tert-butyl ether U 101 500 1000 12/11/2023 04:51 WG2186772 Naphthalene U 174 2500 1000 12/11/2023 04:51 WG2186772 n-Propylbenzene U 99.3 500 1000 12/11/2023 04:51 WG2186772 Styrene U 118 500 1000 12/11/2023 04:51 WG2186772 1,1,1,2-Tetrachloroethane U 147 500 1000 12/11/2023 04:51 WG2186772 1,1,2,2-Tetrachloroethane U 133 500 1000 12/11/2023 04:51 WG2186772 1 Cp 2Tc 3Ss 4Cn 5Sr 6Qc 7Gl 8Al 9Sc ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE: ATC Group Services LLC L1684381 12/12/23 16:54 13 of 29 ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE: ATC Group Services LLC L1684381 12/14/23 00:11 13 of 29 SAMPLE RESULTS - 05 L1684381 MW-9 Collected date/time: 11/30/23 11:07 Volatile Organic Compounds (GC/MS) by Method 8260D Result Qualifier MDL RDL Dilution Analysis Batch Analyte ug/l ug/l ug/l date / time 1,1,2-Trichlorotrifluoroethane U 180 500 1000 12/11/2023 04:51 WG2186772 Tetrachloroethene 99300 300 500 1000 12/11/2023 04:51 WG2186772 Toluene U 278 500 1000 12/11/2023 04:51 WG2186772 1,2,3-Trichlorobenzene U 164 500 1000 12/11/2023 04:51 WG2186772 1,2,4-Trichlorobenzene U 481 1000 1000 12/11/2023 04:51 WG2186772 1,1,1-Trichloroethane U 149 500 1000 12/11/2023 04:51 WG2186772 1,1,2-Trichloroethane U 158 500 1000 12/11/2023 04:51 WG2186772 Trichloroethene 1050 190 500 1000 12/11/2023 04:51 WG2186772 Trichlorofluoromethane U 160 2500 1000 12/11/2023 04:51 WG2186772 1,2,3-Trichloropropane U 237 2500 1000 12/11/2023 04:51 WG2186772 1,2,4-Trimethylbenzene U 322 500 1000 12/11/2023 04:51 WG2186772 1,2,3-Trimethylbenzene U 104 500 1000 12/11/2023 04:51 WG2186772 1,3,5-Trimethylbenzene U 104 500 1000 12/11/2023 04:51 WG2186772 Vinyl acetate U 692 5000 1000 12/11/2023 04:51 WG2186772 Vinyl chloride U C3 234 500 1000 12/11/2023 04:51 WG2186772 Xylenes, Total U 174 1500 1000 12/11/2023 04:51 WG2186772 (S) Toluene-d8 106 80.0-120 12/11/2023 04:51 WG2186772 (S) 4-Bromofluorobenzene 99.6 77.0-126 12/11/2023 04:51 WG2186772 (S) 1,2-Dichloroethane-d4 92.3 70.0-130 12/11/2023 04:51 WG2186772 1 Cp 2Tc 3Ss 4Cn 5Sr 6Qc 7Gl 8Al 9Sc ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE: ATC Group Services LLC L1684381 12/12/23 16:54 14 of 29 ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE: ATC Group Services LLC L1684381 12/14/23 00:11 14 of 29 SAMPLE RESULTS - 06 L1684381 MW-10S Collected date/time: 11/30/23 10:40 Volatile Organic Compounds (GC/MS) by Method 8260D Result Qualifier MDL RDL Dilution Analysis Batch Analyte ug/l ug/l ug/l date / time Acetone U C3 11.3 25.0 1 12/11/2023 01:33 WG2186772 Acrylonitrile U 0.671 5.00 1 12/11/2023 01:33 WG2186772 Benzene 0.340 J 0.0941 0.500 1 12/11/2023 01:33 WG2186772 Bromobenzene U 0.118 0.500 1 12/11/2023 01:33 WG2186772 Bromodichloromethane U 0.136 0.500 1 12/11/2023 01:33 WG2186772 Bromochloromethane U 0.128 0.500 1 12/11/2023 01:33 WG2186772 Bromoform U 0.129 0.500 1 12/11/2023 01:33 WG2186772 Bromomethane U 0.605 2.50 1 12/11/2023 01:33 WG2186772 n-Butylbenzene U 0.157 0.500 1 12/11/2023 01:33 WG2186772 sec-Butylbenzene U 0.125 0.500 1 12/11/2023 01:33 WG2186772 tert-Butylbenzene U 0.127 0.500 1 12/11/2023 01:33 WG2186772 Carbon disulfide U 0.0962 0.500 1 12/11/2023 01:33 WG2186772 Carbon tetrachloride U 0.128 0.500 1 12/11/2023 01:33 WG2186772 Chlorobenzene U 0.117 0.500 1 12/11/2023 01:33 WG2186772 Chlorodibromomethane U 0.140 0.500 1 12/11/2023 01:33 WG2186772 Chloroethane U C3 0.192 2.50 1 12/11/2023 01:33 WG2186772 Chloroform 0.210 J 0.111 0.500 1 12/11/2023 01:33 WG2186772 Chloromethane U 0.960 1.25 1 12/11/2023 01:33 WG2186772 2-Chlorotoluene U 0.106 0.500 1 12/11/2023 01:33 WG2186772 4-Chlorotoluene U 0.114 0.500 1 12/11/2023 01:33 WG2186772 1,2-Dibromo-3-Chloropropane U 0.276 2.50 1 12/11/2023 01:33 WG2186772 1,2-Dibromoethane U 0.126 0.500 1 12/11/2023 01:33 WG2186772 Dibromomethane U 0.122 0.500 1 12/11/2023 01:33 WG2186772 1,2-Dichlorobenzene U 0.107 0.500 1 12/11/2023 01:33 WG2186772 1,3-Dichlorobenzene U 0.299 0.500 1 12/11/2023 01:33 WG2186772 1,4-Dichlorobenzene U 0.120 0.500 1 12/11/2023 01:33 WG2186772 Dichlorodifluoromethane U 0.374 2.50 1 12/11/2023 01:33 WG2186772 1,1-Dichloroethane U 0.100 0.500 1 12/11/2023 01:33 WG2186772 1,2-Dichloroethane U 0.0819 0.500 1 12/11/2023 01:33 WG2186772 1,1-Dichloroethene 0.215 J 0.188 0.500 1 12/11/2023 01:33 WG2186772 cis-1,2-Dichloroethene 70.9 0.126 0.500 1 12/11/2023 01:33 WG2186772 trans-1,2-Dichloroethene U 0.149 0.500 1 12/11/2023 01:33 WG2186772 1,2-Dichloropropane U 0.149 0.500 1 12/11/2023 01:33 WG2186772 1,1-Dichloropropene U 0.142 0.500 1 12/11/2023 01:33 WG2186772 1,3-Dichloropropane U 0.109 1.00 1 12/11/2023 01:33 WG2186772 cis-1,3-Dichloropropene U 0.111 0.500 1 12/11/2023 01:33 WG2186772 trans-1,3-Dichloropropene U 0.118 0.500 1 12/11/2023 01:33 WG2186772 trans-1,4-Dichloro-2-butene U C3 0.467 5.00 1 12/11/2023 01:33 WG2186772 2,2-Dichloropropane U 0.161 0.500 1 12/11/2023 01:33 WG2186772 Di-isopropyl ether U 0.105 0.500 1 12/11/2023 01:33 WG2186772 Ethylbenzene U 0.137 0.500 1 12/11/2023 01:33 WG2186772 Hexachloro-1,3-butadiene U J4 0.337 1.00 1 12/11/2023 01:33 WG2186772 2-Hexanone U 0.787 5.00 1 12/11/2023 01:33 WG2186772 n-Hexane U 0.749 5.00 1 12/11/2023 01:33 WG2186772 Iodomethane U 0.554 5.00 1 12/11/2023 01:33 WG2186772 Isopropylbenzene U 0.105 0.500 1 12/11/2023 01:33 WG2186772 p-Isopropyltoluene U 0.120 0.500 1 12/11/2023 01:33 WG2186772 2-Butanone (MEK)U 1.19 5.00 1 12/11/2023 01:33 WG2186772 Methylene Chloride U 0.430 2.50 1 12/11/2023 01:33 WG2186772 4-Methyl-2-pentanone (MIBK)U 0.478 5.00 1 12/11/2023 01:33 WG2186772 Methyl tert-butyl ether U 0.101 0.500 1 12/11/2023 01:33 WG2186772 Naphthalene U 0.174 2.50 1 12/11/2023 01:33 WG2186772 n-Propylbenzene U 0.0993 0.500 1 12/11/2023 01:33 WG2186772 Styrene U 0.118 0.500 1 12/11/2023 01:33 WG2186772 1,1,1,2-Tetrachloroethane U 0.147 0.500 1 12/11/2023 01:33 WG2186772 1,1,2,2-Tetrachloroethane U 0.133 0.500 1 12/11/2023 01:33 WG2186772 1 Cp 2Tc 3Ss 4Cn 5Sr 6Qc 7Gl 8Al 9Sc ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE: ATC Group Services LLC L1684381 12/12/23 16:54 15 of 29 ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE: ATC Group Services LLC L1684381 12/14/23 00:11 15 of 29 SAMPLE RESULTS - 06 L1684381 MW-10S Collected date/time: 11/30/23 10:40 Volatile Organic Compounds (GC/MS) by Method 8260D Result Qualifier MDL RDL Dilution Analysis Batch Analyte ug/l ug/l ug/l date / time 1,1,2-Trichlorotrifluoroethane U 0.180 0.500 1 12/11/2023 01:33 WG2186772 Tetrachloroethene 6380 30.0 50.0 100 12/12/2023 01:40 WG2187274 Toluene U 0.278 0.500 1 12/11/2023 01:33 WG2186772 1,2,3-Trichlorobenzene U 0.164 0.500 1 12/11/2023 01:33 WG2186772 1,2,4-Trichlorobenzene U 0.481 1.00 1 12/11/2023 01:33 WG2186772 1,1,1-Trichloroethane U 0.149 0.500 1 12/11/2023 01:33 WG2186772 1,1,2-Trichloroethane U 0.158 0.500 1 12/11/2023 01:33 WG2186772 Trichloroethene 66.5 0.190 0.500 1 12/11/2023 01:33 WG2186772 Trichlorofluoromethane U 0.160 2.50 1 12/11/2023 01:33 WG2186772 1,2,3-Trichloropropane U 0.237 2.50 1 12/11/2023 01:33 WG2186772 1,2,4-Trimethylbenzene U 0.322 0.500 1 12/11/2023 01:33 WG2186772 1,2,3-Trimethylbenzene U 0.104 0.500 1 12/11/2023 01:33 WG2186772 1,3,5-Trimethylbenzene U 0.104 0.500 1 12/11/2023 01:33 WG2186772 Vinyl acetate U 0.692 5.00 1 12/11/2023 01:33 WG2186772 Vinyl chloride 0.450 C3 J 0.234 0.500 1 12/11/2023 01:33 WG2186772 Xylenes, Total U 0.174 1.50 1 12/11/2023 01:33 WG2186772 (S) Toluene-d8 106 80.0-120 12/11/2023 01:33 WG2186772 (S) Toluene-d8 102 80.0-120 12/12/2023 01:40 WG2187274 (S) 4-Bromofluorobenzene 98.1 77.0-126 12/11/2023 01:33 WG2186772 (S) 4-Bromofluorobenzene 97.1 77.0-126 12/12/2023 01:40 WG2187274 (S) 1,2-Dichloroethane-d4 88.1 70.0-130 12/11/2023 01:33 WG2186772 (S) 1,2-Dichloroethane-d4 93.9 70.0-130 12/12/2023 01:40 WG2187274 1 Cp 2Tc 3Ss 4Cn 5Sr 6Qc 7Gl 8Al 9Sc ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE: ATC Group Services LLC L1684381 12/12/23 16:54 16 of 29 ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE: ATC Group Services LLC L1684381 12/14/23 00:11 16 of 29 SAMPLE RESULTS - 07 L1684381 MW-10D Collected date/time: 11/30/23 10:15 Volatile Organic Compounds (GC/MS) by Method 8260D Result Qualifier MDL RDL Dilution Analysis Batch Analyte ug/l ug/l ug/l date / time Acetone U C3 11.3 25.0 1 12/11/2023 01:53 WG2186772 Acrylonitrile U 0.671 5.00 1 12/11/2023 01:53 WG2186772 Benzene U 0.0941 0.500 1 12/11/2023 01:53 WG2186772 Bromobenzene U 0.118 0.500 1 12/11/2023 01:53 WG2186772 Bromodichloromethane U 0.136 0.500 1 12/11/2023 01:53 WG2186772 Bromochloromethane U 0.128 0.500 1 12/11/2023 01:53 WG2186772 Bromoform U 0.129 0.500 1 12/11/2023 01:53 WG2186772 Bromomethane U 0.605 2.50 1 12/11/2023 01:53 WG2186772 n-Butylbenzene U 0.157 0.500 1 12/11/2023 01:53 WG2186772 sec-Butylbenzene U 0.125 0.500 1 12/11/2023 01:53 WG2186772 tert-Butylbenzene U 0.127 0.500 1 12/11/2023 01:53 WG2186772 Carbon disulfide U 0.0962 0.500 1 12/11/2023 01:53 WG2186772 Carbon tetrachloride U 0.128 0.500 1 12/11/2023 01:53 WG2186772 Chlorobenzene U 0.117 0.500 1 12/11/2023 01:53 WG2186772 Chlorodibromomethane U 0.140 0.500 1 12/11/2023 01:53 WG2186772 Chloroethane U C3 0.192 2.50 1 12/11/2023 01:53 WG2186772 Chloroform 0.134 J 0.111 0.500 1 12/11/2023 01:53 WG2186772 Chloromethane U 0.960 1.25 1 12/11/2023 01:53 WG2186772 2-Chlorotoluene U 0.106 0.500 1 12/11/2023 01:53 WG2186772 4-Chlorotoluene U 0.114 0.500 1 12/11/2023 01:53 WG2186772 1,2-Dibromo-3-Chloropropane U 0.276 2.50 1 12/11/2023 01:53 WG2186772 1,2-Dibromoethane U 0.126 0.500 1 12/11/2023 01:53 WG2186772 Dibromomethane U 0.122 0.500 1 12/11/2023 01:53 WG2186772 1,2-Dichlorobenzene U 0.107 0.500 1 12/11/2023 01:53 WG2186772 1,3-Dichlorobenzene U 0.299 0.500 1 12/11/2023 01:53 WG2186772 1,4-Dichlorobenzene U 0.120 0.500 1 12/11/2023 01:53 WG2186772 Dichlorodifluoromethane U 0.374 2.50 1 12/11/2023 01:53 WG2186772 1,1-Dichloroethane U 0.100 0.500 1 12/11/2023 01:53 WG2186772 1,2-Dichloroethane U 0.0819 0.500 1 12/11/2023 01:53 WG2186772 1,1-Dichloroethene 0.484 J 0.188 0.500 1 12/11/2023 01:53 WG2186772 cis-1,2-Dichloroethene 61.1 0.126 0.500 1 12/11/2023 01:53 WG2186772 trans-1,2-Dichloroethene 0.420 J 0.149 0.500 1 12/11/2023 01:53 WG2186772 1,2-Dichloropropane U 0.149 0.500 1 12/11/2023 01:53 WG2186772 1,1-Dichloropropene U 0.142 0.500 1 12/11/2023 01:53 WG2186772 1,3-Dichloropropane U 0.109 1.00 1 12/11/2023 01:53 WG2186772 cis-1,3-Dichloropropene U 0.111 0.500 1 12/11/2023 01:53 WG2186772 trans-1,3-Dichloropropene U 0.118 0.500 1 12/11/2023 01:53 WG2186772 trans-1,4-Dichloro-2-butene U C3 0.467 5.00 1 12/11/2023 01:53 WG2186772 2,2-Dichloropropane U 0.161 0.500 1 12/11/2023 01:53 WG2186772 Di-isopropyl ether U 0.105 0.500 1 12/11/2023 01:53 WG2186772 Ethylbenzene U 0.137 0.500 1 12/11/2023 01:53 WG2186772 Hexachloro-1,3-butadiene U J4 0.337 1.00 1 12/11/2023 01:53 WG2186772 2-Hexanone U 0.787 5.00 1 12/11/2023 01:53 WG2186772 n-Hexane U 0.749 5.00 1 12/11/2023 01:53 WG2186772 Iodomethane U 0.554 5.00 1 12/11/2023 01:53 WG2186772 Isopropylbenzene U 0.105 0.500 1 12/11/2023 01:53 WG2186772 p-Isopropyltoluene U 0.120 0.500 1 12/11/2023 01:53 WG2186772 2-Butanone (MEK)U 1.19 5.00 1 12/11/2023 01:53 WG2186772 Methylene Chloride U 0.430 2.50 1 12/11/2023 01:53 WG2186772 4-Methyl-2-pentanone (MIBK)U 0.478 5.00 1 12/11/2023 01:53 WG2186772 Methyl tert-butyl ether U 0.101 0.500 1 12/11/2023 01:53 WG2186772 Naphthalene U 0.174 2.50 1 12/11/2023 01:53 WG2186772 n-Propylbenzene U 0.0993 0.500 1 12/11/2023 01:53 WG2186772 Styrene U 0.118 0.500 1 12/11/2023 01:53 WG2186772 1,1,1,2-Tetrachloroethane U 0.147 0.500 1 12/11/2023 01:53 WG2186772 1,1,2,2-Tetrachloroethane U 0.133 0.500 1 12/11/2023 01:53 WG2186772 1 Cp 2Tc 3Ss 4Cn 5Sr 6Qc 7Gl 8Al 9Sc ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE: ATC Group Services LLC L1684381 12/12/23 16:54 17 of 29 ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE: ATC Group Services LLC L1684381 12/14/23 00:11 17 of 29 SAMPLE RESULTS - 07 L1684381 MW-10D Collected date/time: 11/30/23 10:15 Volatile Organic Compounds (GC/MS) by Method 8260D Result Qualifier MDL RDL Dilution Analysis Batch Analyte ug/l ug/l ug/l date / time 1,1,2-Trichlorotrifluoroethane U 0.180 0.500 1 12/11/2023 01:53 WG2186772 Tetrachloroethene 384 6.00 10.0 20 12/12/2023 01:59 WG2187274 Toluene U 0.278 0.500 1 12/11/2023 01:53 WG2186772 1,2,3-Trichlorobenzene U 0.164 0.500 1 12/11/2023 01:53 WG2186772 1,2,4-Trichlorobenzene U 0.481 1.00 1 12/11/2023 01:53 WG2186772 1,1,1-Trichloroethane U 0.149 0.500 1 12/11/2023 01:53 WG2186772 1,1,2-Trichloroethane U 0.158 0.500 1 12/11/2023 01:53 WG2186772 Trichloroethene 8.91 0.190 0.500 1 12/11/2023 01:53 WG2186772 Trichlorofluoromethane U 0.160 2.50 1 12/11/2023 01:53 WG2186772 1,2,3-Trichloropropane U 0.237 2.50 1 12/11/2023 01:53 WG2186772 1,2,4-Trimethylbenzene U 0.322 0.500 1 12/11/2023 01:53 WG2186772 1,2,3-Trimethylbenzene U 0.104 0.500 1 12/11/2023 01:53 WG2186772 1,3,5-Trimethylbenzene U 0.104 0.500 1 12/11/2023 01:53 WG2186772 Vinyl acetate U 0.692 5.00 1 12/11/2023 01:53 WG2186772 Vinyl chloride U C3 0.234 0.500 1 12/11/2023 01:53 WG2186772 Xylenes, Total U 0.174 1.50 1 12/11/2023 01:53 WG2186772 (S) Toluene-d8 105 80.0-120 12/11/2023 01:53 WG2186772 (S) Toluene-d8 102 80.0-120 12/12/2023 01:59 WG2187274 (S) 4-Bromofluorobenzene 101 77.0-126 12/11/2023 01:53 WG2186772 (S) 4-Bromofluorobenzene 99.1 77.0-126 12/12/2023 01:59 WG2187274 (S) 1,2-Dichloroethane-d4 91.0 70.0-130 12/11/2023 01:53 WG2186772 (S) 1,2-Dichloroethane-d4 91.5 70.0-130 12/12/2023 01:59 WG2187274 1 Cp 2Tc 3Ss 4Cn 5Sr 6Qc 7Gl 8Al 9Sc ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE: ATC Group Services LLC L1684381 12/12/23 16:54 18 of 29 ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE: ATC Group Services LLC L1684381 12/14/23 00:11 18 of 29 QUALITY CONTROL SUMMARYWG2186772 Volatile Organic Compounds (GC/MS) by Method 8260D L1684381-01,02,03,05,06,07 Method Blank (MB) (MB) R4010887-3 12/10/23 19:13 MB Result MB Qualifier MB MDL MB RDL Analyte ug/l ug/l ug/l Acetone U 11.3 25.0 Acrylonitrile U 0.671 5.00 Benzene U 0.0941 0.500 Bromobenzene U 0.118 0.500 Bromodichloromethane U 0.136 0.500 Bromochloromethane U 0.128 0.500 Bromoform U 0.129 0.500 Bromomethane U 0.605 2.50 n-Butylbenzene U 0.157 0.500 sec-Butylbenzene U 0.125 0.500 tert-Butylbenzene U 0.127 0.500 Carbon disulfide U 0.0962 0.500 Carbon tetrachloride U 0.128 0.500 Chlorobenzene U 0.117 0.500 Chlorodibromomethane U 0.140 0.500 Chloroethane U 0.192 2.50 Chloroform U 0.111 0.500 Chloromethane U 0.960 1.25 2-Chlorotoluene U 0.106 0.500 4-Chlorotoluene U 0.114 0.500 1,2-Dibromo-3-Chloropropane U 0.276 2.50 1,2-Dibromoethane U 0.126 0.500 Dibromomethane U 0.122 0.500 1,2-Dichlorobenzene U 0.107 0.500 1,3-Dichlorobenzene U 0.299 0.500 1,4-Dichlorobenzene U 0.120 0.500 Dichlorodifluoromethane U 0.374 2.50 1,1-Dichloroethane U 0.100 0.500 1,2-Dichloroethane U 0.0819 0.500 1,1-Dichloroethene U 0.188 0.500 cis-1,2-Dichloroethene U 0.126 0.500 trans-1,2-Dichloroethene U 0.149 0.500 1,2-Dichloropropane U 0.149 0.500 1,1-Dichloropropene U 0.142 0.500 1,3-Dichloropropane U 0.109 1.00 cis-1,3-Dichloropropene U 0.111 0.500 trans-1,3-Dichloropropene U 0.118 0.500 trans-1,4-Dichloro-2-butene U 0.467 5.00 2,2-Dichloropropane U 0.161 0.500 Di-isopropyl ether U 0.105 0.500 1 Cp 2Tc 3Ss 4Cn 5Sr 6Qc 7Gl 8Al 9Sc ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE: ATC Group Services LLC L1684381 12/12/23 16:54 19 of 29 ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE: ATC Group Services LLC L1684381 12/14/23 00:11 19 of 29 QUALITY CONTROL SUMMARYWG2186772 Volatile Organic Compounds (GC/MS) by Method 8260D L1684381-01,02,03,05,06,07 Method Blank (MB) (MB) R4010887-3 12/10/23 19:13 MB Result MB Qualifier MB MDL MB RDL Analyte ug/l ug/l ug/l Ethylbenzene U 0.137 0.500 Hexachloro-1,3-butadiene U 0.337 1.00 2-Hexanone U 0.787 5.00 n-Hexane U 0.749 5.00 Iodomethane U 0.554 5.00 Isopropylbenzene U 0.105 0.500 p-Isopropyltoluene U 0.120 0.500 2-Butanone (MEK)U 1.19 5.00 Methylene Chloride U 0.430 2.50 4-Methyl-2-pentanone (MIBK)U 0.478 5.00 Methyl tert-butyl ether U 0.101 0.500 Naphthalene U 0.174 2.50 n-Propylbenzene U 0.0993 0.500 Styrene U 0.118 0.500 1,1,1,2-Tetrachloroethane U 0.147 0.500 1,1,2,2-Tetrachloroethane U 0.133 0.500 1,1,2-Trichlorotrifluoroethane U 0.180 0.500 Tetrachloroethene U 0.300 0.500 Toluene U 0.278 0.500 1,2,3-Trichlorobenzene U 0.164 0.500 1,2,4-Trichlorobenzene U 0.481 1.00 1,1,1-Trichloroethane U 0.149 0.500 1,1,2-Trichloroethane U 0.158 0.500 Trichloroethene U 0.190 0.500 Trichlorofluoromethane U 0.160 2.50 1,2,3-Trichloropropane U 0.237 2.50 1,2,4-Trimethylbenzene U 0.322 0.500 1,2,3-Trimethylbenzene U 0.104 0.500 1,3,5-Trimethylbenzene U 0.104 0.500 Vinyl acetate U 0.692 5.00 Vinyl chloride U 0.234 0.500 Xylenes, Total U 0.174 1.50 (S) Toluene-d8 105 80.0-120 (S) 4-Bromofluorobenzene 101 77.0-126 (S) 1,2-Dichloroethane-d4 90.4 70.0-130 1 Cp 2Tc 3Ss 4Cn 5Sr 6Qc 7Gl 8Al 9Sc ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE: ATC Group Services LLC L1684381 12/12/23 16:54 20 of 29 ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE: ATC Group Services LLC L1684381 12/14/23 00:11 20 of 29 QUALITY CONTROL SUMMARYWG2186772 Volatile Organic Compounds (GC/MS) by Method 8260D L1684381-01,02,03,05,06,07 Laboratory Control Sample (LCS) • Laboratory Control Sample Duplicate (LCSD) (LCS) R4010887-1 12/10/23 18:14 • (LCSD) R4010887-2 12/10/23 18:33 Spike Amount LCS Result LCSD Result LCS Rec.LCSD Rec.Rec. Limits LCS Qualifier LCSD Qualifier RPD RPD Limits Analyte ug/l ug/l ug/l %%%%% Acetone 25.0 18.2 17.6 72.8 70.4 19.0-160 3.35 27 Acrylonitrile 25.0 25.6 25.6 102 102 55.0-149 0.000 20 Benzene 5.00 5.40 5.05 108 101 70.0-123 6.70 20 Bromobenzene 5.00 5.21 5.20 104 104 73.0-121 0.192 20 Bromodichloromethane 5.00 5.48 4.95 110 99.0 75.0-120 10.2 20 Bromochloromethane 5.00 5.55 5.68 111 114 76.0-122 2.32 20 Bromoform 5.00 5.51 5.29 110 106 68.0-132 4.07 20 Bromomethane 5.00 4.35 4.01 87.0 80.2 10.0-160 8.13 25 n-Butylbenzene 5.00 4.64 4.58 92.8 91.6 73.0-125 1.30 20 sec-Butylbenzene 5.00 5.21 4.99 104 99.8 75.0-125 4.31 20 tert-Butylbenzene 5.00 5.16 4.92 103 98.4 76.0-124 4.76 20 Carbon disulfide 5.00 4.50 4.91 90.0 98.2 61.0-128 8.71 20 Carbon tetrachloride 5.00 5.12 5.06 102 101 68.0-126 1.18 20 Chlorobenzene 5.00 5.48 5.37 110 107 80.0-121 2.03 20 Chlorodibromomethane 5.00 5.31 5.42 106 108 77.0-125 2.05 20 Chloroethane 5.00 3.49 3.32 69.8 66.4 47.0-150 4.99 20 Chloroform 5.00 5.03 4.57 101 91.4 73.0-120 9.58 20 Chloromethane 5.00 4.03 3.76 80.6 75.2 41.0-142 6.93 20 2-Chlorotoluene 5.00 5.73 5.19 115 104 76.0-123 9.89 20 4-Chlorotoluene 5.00 4.78 4.46 95.6 89.2 75.0-122 6.93 20 1,2-Dibromo-3-Chloropropane 5.00 4.70 4.85 94.0 97.0 58.0-134 3.14 20 1,2-Dibromoethane 5.00 5.68 5.68 114 114 80.0-122 0.000 20 Dibromomethane 5.00 5.08 5.14 102 103 80.0-120 1.17 20 1,2-Dichlorobenzene 5.00 5.54 5.55 111 111 79.0-121 0.180 20 1,3-Dichlorobenzene 5.00 5.60 5.37 112 107 79.0-120 4.19 20 1,4-Dichlorobenzene 5.00 5.10 4.57 102 91.4 79.0-120 11.0 20 Dichlorodifluoromethane 5.00 5.05 4.31 101 86.2 51.0-149 15.8 20 1,1-Dichloroethane 5.00 5.21 4.72 104 94.4 70.0-126 9.87 20 1,2-Dichloroethane 5.00 4.71 4.53 94.2 90.6 70.0-128 3.90 20 1,1-Dichloroethene 5.00 5.13 5.15 103 103 71.0-124 0.389 20 cis-1,2-Dichloroethene 5.00 5.59 5.28 112 106 73.0-120 5.70 20 trans-1,2-Dichloroethene 5.00 5.56 5.30 111 106 73.0-120 4.79 20 1,2-Dichloropropane 5.00 4.80 4.50 96.0 90.0 77.0-125 6.45 20 1,1-Dichloropropene 5.00 5.26 4.96 105 99.2 74.0-126 5.87 20 1,3-Dichloropropane 5.00 5.20 5.32 104 106 80.0-120 2.28 20 cis-1,3-Dichloropropene 5.00 4.82 4.78 96.4 95.6 80.0-123 0.833 20 trans-1,3-Dichloropropene 5.00 4.35 4.39 87.0 87.8 78.0-124 0.915 20 trans-1,4-Dichloro-2-butene 5.00 2.95 2.51 59.0 50.2 33.0-144 16.1 20 2,2-Dichloropropane 5.00 4.83 4.85 96.6 97.0 58.0-130 0.413 20 Di-isopropyl ether 5.00 4.88 4.65 97.6 93.0 58.0-138 4.83 20 1 Cp 2Tc 3Ss 4Cn 5Sr 6Qc 7Gl 8Al 9Sc ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE: ATC Group Services LLC L1684381 12/12/23 16:54 21 of 29 ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE: ATC Group Services LLC L1684381 12/14/23 00:11 21 of 29 QUALITY CONTROL SUMMARYWG2186772 Volatile Organic Compounds (GC/MS) by Method 8260D L1684381-01,02,03,05,06,07 Laboratory Control Sample (LCS) • Laboratory Control Sample Duplicate (LCSD) (LCS) R4010887-1 12/10/23 18:14 • (LCSD) R4010887-2 12/10/23 18:33 Spike Amount LCS Result LCSD Result LCS Rec.LCSD Rec.Rec. Limits LCS Qualifier LCSD Qualifier RPD RPD Limits Analyte ug/l ug/l ug/l %%%%% Ethylbenzene 5.00 5.62 5.29 112 106 79.0-123 6.05 20 Hexachloro-1,3-butadiene 5.00 7.19 6.68 144 134 54.0-138 J4 7.35 20 2-Hexanone 25.0 23.9 24.3 95.6 97.2 67.0-149 1.66 20 n-Hexane 5.00 4.72 4.65 94.4 93.0 57.0-133 1.49 20 Iodomethane 25.0 27.9 25.8 112 103 33.0-147 7.82 26 Isopropylbenzene 5.00 5.91 5.76 118 115 76.0-127 2.57 20 p-Isopropyltoluene 5.00 5.61 5.47 112 109 76.0-125 2.53 20 2-Butanone (MEK)25.0 24.5 23.1 98.0 92.4 44.0-160 5.88 20 Methylene Chloride 5.00 4.94 4.49 98.8 89.8 67.0-120 9.54 20 4-Methyl-2-pentanone (MIBK)25.0 26.4 26.5 106 106 68.0-142 0.378 20 Methyl tert-butyl ether 5.00 5.31 5.23 106 105 68.0-125 1.52 20 Naphthalene 5.00 4.17 4.48 83.4 89.6 54.0-135 7.17 20 n-Propylbenzene 5.00 4.97 4.74 99.4 94.8 77.0-124 4.74 20 Styrene 5.00 4.90 4.40 98.0 88.0 73.0-130 10.8 20 1,1,1,2-Tetrachloroethane 5.00 5.44 5.27 109 105 75.0-125 3.17 20 1,1,2,2-Tetrachloroethane 5.00 4.40 4.37 88.0 87.4 65.0-130 0.684 20 1,1,2-Trichlorotrifluoroethane 5.00 4.81 4.86 96.2 97.2 69.0-132 1.03 20 Tetrachloroethene 5.00 5.79 6.00 116 120 72.0-132 3.56 20 Toluene 5.00 5.36 5.16 107 103 79.0-120 3.80 20 1,2,3-Trichlorobenzene 5.00 6.20 5.99 124 120 50.0-138 3.45 20 1,2,4-Trichlorobenzene 5.00 4.94 4.88 98.8 97.6 57.0-137 1.22 20 1,1,1-Trichloroethane 5.00 5.32 5.30 106 106 73.0-124 0.377 20 1,1,2-Trichloroethane 5.00 5.33 5.32 107 106 80.0-120 0.188 20 Trichloroethene 5.00 5.69 5.44 114 109 78.0-124 4.49 20 Trichlorofluoromethane 5.00 4.28 4.60 85.6 92.0 59.0-147 7.21 20 1,2,3-Trichloropropane 5.00 4.92 4.76 98.4 95.2 73.0-130 3.31 20 1,2,4-Trimethylbenzene 5.00 5.28 5.18 106 104 76.0-121 1.91 20 1,2,3-Trimethylbenzene 5.00 5.34 5.09 107 102 77.0-120 4.79 20 1,3,5-Trimethylbenzene 5.00 4.88 4.60 97.6 92.0 76.0-122 5.91 20 Vinyl acetate 25.0 25.7 25.1 103 100 11.0-160 2.36 20 Vinyl chloride 5.00 3.97 3.88 79.4 77.6 67.0-131 2.29 20 Xylenes, Total 15.0 18.2 17.5 121 117 79.0-123 3.92 20 (S) Toluene-d8 100 105 80.0-120 (S) 4-Bromofluorobenzene 105 106 77.0-126 (S) 1,2-Dichloroethane-d4 89.5 89.9 70.0-130 1 Cp 2Tc 3Ss 4Cn 5Sr 6Qc 7Gl 8Al 9Sc ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE: ATC Group Services LLC L1684381 12/12/23 16:54 22 of 29 ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE: ATC Group Services LLC L1684381 12/14/23 00:11 22 of 29 QUALITY CONTROL SUMMARYWG2187274 Volatile Organic Compounds (GC/MS) by Method 8260D L1684381-04,06,07 Method Blank (MB) (MB) R4011397-2 12/11/23 17:05 MB Result MB Qualifier MB MDL MB RDL Analyte ug/l ug/l ug/l Acetone U 11.3 25.0 Acrylonitrile U 0.671 5.00 Benzene U 0.0941 0.500 Bromobenzene U 0.118 0.500 Bromodichloromethane U 0.136 0.500 Bromochloromethane U 0.128 0.500 Bromoform U 0.129 0.500 Bromomethane U 0.605 2.50 n-Butylbenzene U 0.157 0.500 sec-Butylbenzene U 0.125 0.500 tert-Butylbenzene U 0.127 0.500 Carbon disulfide U 0.0962 0.500 Carbon tetrachloride U 0.128 0.500 Chlorobenzene U 0.117 0.500 Chlorodibromomethane U 0.140 0.500 Chloroethane U 0.192 2.50 Chloroform U 0.111 0.500 Chloromethane U 0.960 1.25 2-Chlorotoluene U 0.106 0.500 4-Chlorotoluene U 0.114 0.500 1,2-Dibromo-3-Chloropropane U 0.276 2.50 1,2-Dibromoethane U 0.126 0.500 Dibromomethane U 0.122 0.500 1,2-Dichlorobenzene U 0.107 0.500 1,3-Dichlorobenzene U 0.299 0.500 1,4-Dichlorobenzene U 0.120 0.500 Dichlorodifluoromethane U 0.374 2.50 1,1-Dichloroethane U 0.100 0.500 1,2-Dichloroethane U 0.0819 0.500 1,1-Dichloroethene U 0.188 0.500 cis-1,2-Dichloroethene U 0.126 0.500 trans-1,2-Dichloroethene U 0.149 0.500 1,2-Dichloropropane U 0.149 0.500 1,1-Dichloropropene U 0.142 0.500 1,3-Dichloropropane U 0.109 1.00 cis-1,3-Dichloropropene U 0.111 0.500 trans-1,3-Dichloropropene U 0.118 0.500 trans-1,4-Dichloro-2-butene U 0.467 5.00 2,2-Dichloropropane U 0.161 0.500 Di-isopropyl ether U 0.105 0.500 1 Cp 2Tc 3Ss 4Cn 5Sr 6Qc 7Gl 8Al 9Sc ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE: ATC Group Services LLC L1684381 12/12/23 16:54 23 of 29 ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE: ATC Group Services LLC L1684381 12/14/23 00:11 23 of 29 QUALITY CONTROL SUMMARYWG2187274 Volatile Organic Compounds (GC/MS) by Method 8260D L1684381-04,06,07 Method Blank (MB) (MB) R4011397-2 12/11/23 17:05 MB Result MB Qualifier MB MDL MB RDL Analyte ug/l ug/l ug/l Ethylbenzene U 0.137 0.500 Hexachloro-1,3-butadiene U 0.337 1.00 2-Hexanone U 0.787 5.00 n-Hexane U 0.749 5.00 Iodomethane U 0.554 5.00 Isopropylbenzene U 0.105 0.500 p-Isopropyltoluene U 0.120 0.500 2-Butanone (MEK)U 1.19 5.00 Methylene Chloride U 0.430 2.50 4-Methyl-2-pentanone (MIBK)U 0.478 5.00 Methyl tert-butyl ether U 0.101 0.500 Naphthalene U 0.174 2.50 n-Propylbenzene U 0.0993 0.500 Styrene U 0.118 0.500 1,1,1,2-Tetrachloroethane U 0.147 0.500 1,1,2,2-Tetrachloroethane U 0.133 0.500 1,1,2-Trichlorotrifluoroethane U 0.180 0.500 Tetrachloroethene U 0.300 0.500 Toluene U 0.278 0.500 1,2,3-Trichlorobenzene U 0.164 0.500 1,2,4-Trichlorobenzene U 0.481 1.00 1,1,1-Trichloroethane U 0.149 0.500 1,1,2-Trichloroethane U 0.158 0.500 Trichloroethene U 0.190 0.500 Trichlorofluoromethane U 0.160 2.50 1,2,3-Trichloropropane U 0.237 2.50 1,2,4-Trimethylbenzene U 0.322 0.500 1,2,3-Trimethylbenzene U 0.104 0.500 1,3,5-Trimethylbenzene U 0.104 0.500 Vinyl acetate U 0.692 5.00 Vinyl chloride U 0.234 0.500 Xylenes, Total U 0.174 1.50 (S) Toluene-d8 101 80.0-120 (S) 4-Bromofluorobenzene 98.3 77.0-126 (S) 1,2-Dichloroethane-d4 90.0 70.0-130 1 Cp 2Tc 3Ss 4Cn 5Sr 6Qc 7Gl 8Al 9Sc ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE: ATC Group Services LLC L1684381 12/12/23 16:54 24 of 29 ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE: ATC Group Services LLC L1684381 12/14/23 00:11 24 of 29 QUALITY CONTROL SUMMARYWG2187274 Volatile Organic Compounds (GC/MS) by Method 8260D L1684381-04,06,07 Laboratory Control Sample (LCS) (LCS) R4011397-1 12/11/23 16:26 Spike Amount LCS Result LCS Rec.Rec. Limits LCS Qualifier Analyte ug/l ug/l %% Acetone 25.0 20.1 80.4 19.0-160 Acrylonitrile 25.0 24.9 99.6 55.0-149 Benzene 5.00 4.91 98.2 70.0-123 Bromobenzene 5.00 4.73 94.6 73.0-121 Bromodichloromethane 5.00 4.52 90.4 75.0-120 Bromochloromethane 5.00 4.84 96.8 76.0-122 Bromoform 5.00 5.17 103 68.0-132 Bromomethane 5.00 4.23 84.6 10.0-160 n-Butylbenzene 5.00 4.97 99.4 73.0-125 sec-Butylbenzene 5.00 4.52 90.4 75.0-125 tert-Butylbenzene 5.00 5.36 107 76.0-124 Carbon disulfide 5.00 4.19 83.8 61.0-128 Carbon tetrachloride 5.00 4.71 94.2 68.0-126 Chlorobenzene 5.00 4.95 99.0 80.0-121 Chlorodibromomethane 5.00 5.07 101 77.0-125 Chloroethane 5.00 3.73 74.6 47.0-150 Chloroform 5.00 4.68 93.6 73.0-120 Chloromethane 5.00 4.10 82.0 41.0-142 2-Chlorotoluene 5.00 4.67 93.4 76.0-123 4-Chlorotoluene 5.00 4.80 96.0 75.0-122 1,2-Dibromo-3-Chloropropane 5.00 4.40 88.0 58.0-134 1,2-Dibromoethane 5.00 4.81 96.2 80.0-122 Dibromomethane 5.00 4.49 89.8 80.0-120 1,2-Dichlorobenzene 5.00 4.73 94.6 79.0-121 1,3-Dichlorobenzene 5.00 4.91 98.2 79.0-120 1,4-Dichlorobenzene 5.00 4.74 94.8 79.0-120 Dichlorodifluoromethane 5.00 3.54 70.8 51.0-149 1,1-Dichloroethane 5.00 4.61 92.2 70.0-126 1,2-Dichloroethane 5.00 4.47 89.4 70.0-128 1,1-Dichloroethene 5.00 4.39 87.8 71.0-124 cis-1,2-Dichloroethene 5.00 4.40 88.0 73.0-120 trans-1,2-Dichloroethene 5.00 4.47 89.4 73.0-120 1,2-Dichloropropane 5.00 4.92 98.4 77.0-125 1,1-Dichloropropene 5.00 4.77 95.4 74.0-126 1,3-Dichloropropane 5.00 5.00 100 80.0-120 cis-1,3-Dichloropropene 5.00 4.40 88.0 80.0-123 trans-1,3-Dichloropropene 5.00 4.81 96.2 78.0-124 trans-1,4-Dichloro-2-butene 5.00 5.72 114 33.0-144 2,2-Dichloropropane 5.00 4.93 98.6 58.0-130 Di-isopropyl ether 5.00 4.63 92.6 58.0-138 1 Cp 2Tc 3Ss 4Cn 5Sr 6Qc 7Gl 8Al 9Sc ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE: ATC Group Services LLC L1684381 12/12/23 16:54 25 of 29 ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE: ATC Group Services LLC L1684381 12/14/23 00:11 25 of 29 QUALITY CONTROL SUMMARYWG2187274 Volatile Organic Compounds (GC/MS) by Method 8260D L1684381-04,06,07 Laboratory Control Sample (LCS) (LCS) R4011397-1 12/11/23 16:26 Spike Amount LCS Result LCS Rec.Rec. Limits LCS Qualifier Analyte ug/l ug/l %% Ethylbenzene 5.00 4.95 99.0 79.0-123 Hexachloro-1,3-butadiene 5.00 5.84 117 54.0-138 2-Hexanone 25.0 23.4 93.6 67.0-149 n-Hexane 5.00 3.86 77.2 57.0-133 Iodomethane 25.0 20.4 81.6 33.0-147 Isopropylbenzene 5.00 5.21 104 76.0-127 p-Isopropyltoluene 5.00 4.69 93.8 76.0-125 2-Butanone (MEK)25.0 23.8 95.2 44.0-160 Methylene Chloride 5.00 4.21 84.2 67.0-120 4-Methyl-2-pentanone (MIBK)25.0 24.6 98.4 68.0-142 Methyl tert-butyl ether 5.00 4.46 89.2 68.0-125 Naphthalene 5.00 5.30 106 54.0-135 n-Propylbenzene 5.00 4.74 94.8 77.0-124 Styrene 5.00 5.15 103 73.0-130 1,1,1,2-Tetrachloroethane 5.00 5.17 103 75.0-125 1,1,2,2-Tetrachloroethane 5.00 4.65 93.0 65.0-130 1,1,2-Trichlorotrifluoroethane 5.00 3.94 78.8 69.0-132 Tetrachloroethene 5.00 5.15 103 72.0-132 Toluene 5.00 4.90 98.0 79.0-120 1,2,3-Trichlorobenzene 5.00 5.07 101 50.0-138 1,2,4-Trichlorobenzene 5.00 5.13 103 57.0-137 1,1,1-Trichloroethane 5.00 4.50 90.0 73.0-124 1,1,2-Trichloroethane 5.00 5.10 102 80.0-120 Trichloroethene 5.00 4.77 95.4 78.0-124 Trichlorofluoromethane 5.00 4.31 86.2 59.0-147 1,2,3-Trichloropropane 5.00 4.47 89.4 73.0-130 1,2,4-Trimethylbenzene 5.00 4.77 95.4 76.0-121 1,2,3-Trimethylbenzene 5.00 4.63 92.6 77.0-120 1,3,5-Trimethylbenzene 5.00 4.64 92.8 76.0-122 Vinyl acetate 25.0 23.6 94.4 11.0-160 Vinyl chloride 5.00 4.19 83.8 67.0-131 Xylenes, Total 15.0 15.0 100 79.0-123 (S) Toluene-d8 97.9 80.0-120 (S) 4-Bromofluorobenzene 106 77.0-126 (S) 1,2-Dichloroethane-d4 101 70.0-130 1 Cp 2Tc 3Ss 4Cn 5Sr 6Qc 7Gl 8Al 9Sc ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE: ATC Group Services LLC L1684381 12/12/23 16:54 26 of 29 ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE: ATC Group Services LLC L1684381 12/14/23 00:11 26 of 29 GLOSSARY OF TERMS Guide to Reading and Understanding Your Laboratory Report The information below is designed to better explain the various terms used in your report of analytical results from the Laboratory. This is not intended as a comprehensive explanation, and if you have additional questions please contact your project representative. Results Disclaimer - Information that may be provided by the customer, and contained within this report, include Permit Limits, Project Name, Sample ID, Sample Matrix, Sample Preservation, Field Blanks, Field Spikes, Field Duplicates, On-Site Data, Sampling Collection Dates/Times, and Sampling Location. Results relate to the accuracy of this information provided, and as the samples are received. Abbreviations and Definitions MDL Method Detection Limit. RDL Reported Detection Limit. Rec.Recovery. RPD Relative Percent Difference. SDG Sample Delivery Group. (S)Surrogate (Surrogate Standard) - Analytes added to every blank, sample, Laboratory Control Sample/Duplicate and Matrix Spike/Duplicate; used to evaluate analytical efficiency by measuring recovery. Surrogates are not expected to be detected in all environmental media. U Not detected at the Reporting Limit (or MDL where applicable). Analyte The name of the particular compound or analysis performed. Some Analyses and Methods will have multiple analytes reported. Dilution If the sample matrix contains an interfering material, the sample preparation volume or weight values differ from the standard, or if concentrations of analytes in the sample are higher than the highest limit of concentration that the laboratory can accurately report, the sample may be diluted for analysis. If a value different than 1 is used in this field, the result reported has already been corrected for this factor. Limits These are the target % recovery ranges or % difference value that the laboratory has historically determined as normal for the method and analyte being reported. Successful QC Sample analysis will target all analytes recovered or duplicated within these ranges. Qualifier This column provides a letter and/or number designation that corresponds to additional information concerning the result reported. If a Qualifier is present, a definition per Qualifier is provided within the Glossary and Definitions page and potentially a discussion of possible implications of the Qualifier in the Case Narrative if applicable. Result The actual analytical final result (corrected for any sample specific characteristics) reported for your sample. If there was no measurable result returned for a specific analyte, the result in this column may state “ND” (Not Detected) or “BDL” (Below Detectable Levels). The information in the results column should always be accompanied by either an MDL (Method Detection Limit) or RDL (Reporting Detection Limit) that defines the lowest value that the laboratory could detect or report for this analyte. Uncertainty (Radiochemistry)Confidence level of 2 sigma. Case Narrative (Cn) A brief discussion about the included sample results, including a discussion of any non-conformances to protocol observed either at sample receipt by the laboratory from the field or during the analytical process. If present, there will be a section in the Case Narrative to discuss the meaning of any data qualifiers used in the report. Quality Control Summary (Qc) This section of the report includes the results of the laboratory quality control analyses required by procedure or analytical methods to assist in evaluating the validity of the results reported for your samples. These analyses are not being performed on your samples typically, but on laboratory generated material. Sample Chain of Custody (Sc) This is the document created in the field when your samples were initially collected. This is used to verify the time and date of collection, the person collecting the samples, and the analyses that the laboratory is requested to perform. This chain of custody also documents all persons (excluding commercial shippers) that have had control or possession of the samples from the time of collection until delivery to the laboratory for analysis. Sample Results (Sr) This section of your report will provide the results of all testing performed on your samples. These results are provided by sample ID and are separated by the analyses performed on each sample. The header line of each analysis section for each sample will provide the name and method number for the analysis reported. Sample Summary (Ss)This section of the Analytical Report defines the specific analyses performed for each sample ID, including the dates and times of preparation and/or analysis. Qualifier Description C3 The reported concentration is an estimate. The continuing calibration standard associated with this data responded low. Method sensitivity check is acceptable. J The identification of the analyte is acceptable; the reported value is an estimate. J4 The associated batch QC was outside the established quality control range for accuracy. 1 Cp 2Tc 3Ss 4Cn 5Sr 6Qc 7Gl 8Al 9Sc ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE: ATC Group Services LLC L1684381 12/12/23 16:54 27 of 29 ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE: ATC Group Services LLC L1684381 12/14/23 00:11 27 of 29 Pace Analytical National 12065 Lebanon Rd Mount Juliet, TN 37122 Alabama 40660 Nebraska NE-OS-15-05 Alaska 17-026 Nevada TN000032021-1 Arizona AZ0612 New Hampshire 2975 Arkansas 88-0469 New Jersey–NELAP TN002 California 2932 New Mexico ¹TN00003 Colorado TN00003 New York 11742 Connecticut PH-0197 North Carolina Env375 Florida E87487 North Carolina ¹DW21704 Georgia NELAP North Carolina ³41 Georgia ¹923 North Dakota R-140 Idaho TN00003 Ohio–VAP CL0069 Illinois 200008 Oklahoma 9915 Indiana C-TN-01 Oregon TN200002 Iowa 364 Pennsylvania 68-02979 Kansas E-10277 Rhode Island LAO00356 Kentucky ¹ ⁶KY90010 South Carolina 84004002 Kentucky ²16 South Dakota n/a Louisiana AI30792 Tennessee ¹ ⁴2006 Louisiana LA018 Texas T104704245-20-18 Maine TN00003 Texas ⁵LAB0152 Maryland 324 Utah TN000032021-11 Massachusetts M-TN003 Vermont VT2006 Michigan 9958 Virginia 110033 Minnesota 047-999-395 Washington C847 Mississippi TN00003 West Virginia 233 Missouri 340 Wisconsin 998093910 Montana CERT0086 Wyoming A2LA A2LA – ISO 17025 1461.01 AIHA-LAP,LLC EMLAP 100789 A2LA – ISO 17025 ⁵1461.02 DOD 1461.01 Canada 1461.01 USDA P330-15-00234 EPA–Crypto TN00003 ACCREDITATIONS & LOCATIONS ¹ Drinking Water ² Underground Storage Tanks ³ Aquatic Toxicity ⁴ Chemical/Microbiological ⁵ Mold ⁶ Wastewater n/a Accreditation not applicable * Not all certifications held by the laboratory are applicable to the results reported in the attached report. * Accreditation is only applicable to the test methods specified on each scope of accreditation held by Pace Analytical. 1 Cp 2Tc 3Ss 4Cn 5Sr 6Qc 7Gl 8Al 9Sc ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE: ATC Group Services LLC L1684381 12/12/23 16:54 28 of 29 ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE: ATC Group Services LLC L1684381 12/14/23 00:11 28 of 29 ATTACHMENT 16 WATER SUPPLY WELL LOCATION MAP SO U T H F A Y E T T E V I L L E S T R E E T LEGEND: NOTE: ALL LOCATIONS ARE APPROXIMATE WATER SUPPLY WELL Well Identification 0.5 MILE RADIUS WSW-1 WSW-3 WSW-2 WSW-4 WSW-5 WSW-6 WSW-10 WSW-11 WSW-12 WSW-7 WSW-8 WSW-9 1,500 FT. RADIUS 600400200 SCALE: 1" = 600' 0 N WSW-1 SITE SO U T H C O X S T R E E T WEST WALKER AVENUE EAST DI X I E D R I V E WESEAST DORSETT AVENUE SO U T H P A R K S T R E E T COOP E R S T R E E T ALB E M A R L E R O A D TELEPHONE AVENUE ATLANTIC AVENUECOUNTRY CLUB DRIVE LINDSEY AVENUE STOWE AVENUE CE N T E R S T R E E T OA K L A N D S T R E E T GL E N W O O D R O A D SO U T H C H U R C H S T R E E T HA M M E R A V E N U E SOU T H M A I N S T R E E T GR E E N S B O R O S T R E E T ARMFIELD AVENUE SPENCER AVENUE LE E S T R E E T DELLWOOD AVENUE UW H A R R I E S T R E E T WILLIAM AVENUE BRITT AVENUE DELLWOOD AVENUE ST R A I G H T S T R E E T RICH AVENUE SILVER AVENUE EAST KIVETT STREET Project Number: Date: Drn. By:Ckd. By: Figure: Scale: 07/18/2024 C: \ U S E R S \ E C H O . M I L A N U K \ O N E A T L A S \ D I G I T A L S E R V I C E S - F I L E S E R V E R \ 2 0 2 4 \ C A D D E P A R T M E N T \ N C D E Q - D W M - D S C A P R O G R A M \ 7 6 - 0 0 0 1 K I Z E R ' S A U T O M A T I C \ D C 7 6 0 1 S L 1 6 - W S W . D W G , AT T 1 6 KI Z E R ' S A U T O M A T I C S E L F S E R V I C E 13 3 T A F T A V E N U E AS H E B O R O , R A N D O L P H C O U N T Y , N O R T H C A R O L I N A DC7601SL16 EM NK AS SHOWN 16 WA T E R S U P P L Y W E L L L O C A T I O N M A P ATTACHMENT 17 PHOTOGRAPH LOG ATC Group Services LLC 2725 E. Millbrook Road, Suite 121 Raleigh, NC 27604 (919) 871-0999 PHOTOGRAPHS PROJECT NO: DC7601SL16 REVIEWED BY: LG SCALE: NTS DATE: 11/2023 PHOTO 1: Front of former dry-cleaning facility, facing northwest. Kizer’s Automatic Self Service 133 E. Taft Avenue Asheboro, Randolph County, North Carolina DSCA Site ID DC760001 PHOTO 2: Rear side of former dry-cleaning facility, facing southwest. ATC Group Services LLC 2725 E. Millbrook Road, Suite 121 Raleigh, NC 27604 (919) 871-0999 PHOTOGRAPHS PROJECT NO: DC7601SL16 REVIEWED BY: LG SCALE: NTS DATE: 11/2023 PHOTO 3: A view of the former dry-cleaning facility multi-tenant building, facing northeast. Kizer’s Automatic Self Service 133 E. Taft Avenue Asheboro, Randolph County, North Carolina DSCA Site ID DC760001 PHOTO 4: Monitoring well MW-5. ATC Group Services LLC 2725 E. Millbrook Road, Suite 121 Raleigh, NC 27604 (919) 871-0999 PHOTOGRAPHS PROJECT NO: DC7601SL16 REVIEWED BY: LG SCALE: NTS DATE: 11/2023 PHOTO 5: Monitoring MW-6. Kizer’s Automatic Self Service 133 E. Taft Avenue Asheboro, Randolph County, North Carolina DSCA Site ID DC760001 PHOTO 6: Monitoring well MW-7 ATC Group Services LLC 2725 E. Millbrook Road, Suite 121 Raleigh, NC 27604 (919) 871-0999 PHOTOGRAPHS PROJECT NO: DC7601SL16 REVIEWED BY: LG SCALE: NTS DATE: 11/2023 PHOTO 7: Monitoring well MW-8. Kizer’s Automatic Self Service 133 E. Taft Avenue Asheboro, Randolph County, North Carolina DSCA Site ID DC760001 PHOTO 8: Monitoring well MW-9. ATC Group Services LLC 2725 E. Millbrook Road, Suite 121 Raleigh, NC 27604 (919) 871-0999 PHOTOGRAPHS PROJECT NO: DC7601SL16 REVIEWED BY: LG SCALE: NTS DATE: 11/2023 PHOTO 9: Monitoring well MW-10S. Kizer’s Automatic Self Service 133 E. Taft Avenue Asheboro, Randolph County, North Carolina DSCA Site ID DC760001 PHOTO 10: Monitoring well MW-10D.