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Home My WebLink AboutWS-4308_13998_CA_MRP_20230829 Arcadis G&M of North Carolina, Inc. Wade I 5420 Wade Park Boulevard Suite 350 Raleigh, NC 27607 Tel 919 854 1282 Fax 919 854 5448 Ms. Christina Schroeter NCDEQ – UST Section Winston-Salem Regional Office 450 West Hanes Mill Road, Suite #300 Winston-Salem, North Carolina 27105 Subject: Groundwater Monitoring & Sampling Report – 1H2023 Former Gant Oil Company #823 4325 Old Rural Hall Rd Winston-Salem, Forsyth County, North Carolina Groundwater Incident #13998/37979 Risk Ranking: Intermediate Dear Ms. Schroeter: On behalf of Transport Pool Corporation (TPC, formerly CNL APF Partners, LP), Arcadis G&M of North Carolina, Inc. (Arcadis) is submitting the attached Groundwater Monitoring & Sampling Report – 1H2023 for the above referenced site. Please contact me at (919) 328-5605 with any questions or concerns related to the Report or this incident number. Sincerely, Arcadis G&M of North Carolina, Inc. Hardik Patel Certified Project Manager Copies: File – Former Gant Oil Company #823 (Winston-Salem, North Carolina) GE – Mr. Bob Witsell ENVIRONMENT Date: August 29, 2023 Contact: Hardik Patel Phone: 919.328.5605 Email: Hardik.Patel@arcadis.com Our ref: ARC16052.4000 30006419.4000A Transport Pool Corporation (Formerly CNL APF Partners, LP) Groundwater Monitoring and Sampling Report – 1H2023 EXPREZIT! #823 4325 Old Rural Hall Rd Winston-Salem, Forsyth County, North Carolina NCDEQ Incident #13998/37979 August 2023 Groundwater Monitoring and Sampling Report – 1H2023 arcadis.com ii CONTENTS 1.0 Site History and Characterization ........................................................................................................... 1 2.0 Free Product ........................................................................................................................................... 3 3.0 Groundwater Monitoring .......................................................................................................................... 4 3.1 Groundwater Gauging ....................................................................................................................... 4 3.2 Groundwater Sampling ..................................................................................................................... 4 3.3 Groundwater Analytical Results ........................................................................................................ 5 4.0 Site Remediation ..................................................................................................................................... 7 5.0 Conclusions and Recommendations ....................................................................................................... 8 TABLES Table 1. Monitoring Well Construction Details Table 2. Current Groundwater Elevation Data Table 3. Current Groundwater Analytical Data FIGURES Figure 1. Site Location Map Figure 2. Site Map Figure 3. Potentiometric Surface Map – June 8, 2023 Figure 4. Groundwater Analytical Data – June 7, 2022 to June 8, 2023 Figure 5. Benzene Concentration Map – June 8, 2023 APPENDICES A- Historical Groundwater Elevation Data B- Laboratory Analytical Report and Chain-of-Custody Record – June 16, 2023 C- Historical Groundwater Analytical Data Groundwater Monitoring and Sampling Report – 1H2023 arcadis.com 1 EXECUTIVE SUMMARY On behalf of Transport Pool Corporation (Formerly CNL APF Partners, LP), Arcadis G&M of North Carolina, Inc. (Arcadis) personnel performed semi-annual groundwater monitoring and sampling activities during 1H2023 at Former Gant Oil Company #823 located at 4325 Old Rural Hall Road in Winston-Salem, Forsyth County, North Carolina (the Site). The objective of the groundwater monitoring and sampling program is to confirm stable or decreasing concentrations of dissolved-phase chemicals of concern (COCs), and to maintain compliance with the North Carolina Department of Environmental Quality (NCDEQ) Underground Storage Tank (UST) Program requirements for the Site. On June 8, 2023, sixteen (16) groundwater monitoring wells (MW-3, MW-6, MW-7, MW- 8, MW-9, MW-10, MW-11, MW-12, MW-13, MW-14, MW-15, MW-16, MW-17, MW-18, MW-19 and MW-20) and four (4) deep groundwater monitoring wells (DW-1, DW-2, DW- 3, and VEW-4) were gauged to determine the depth to water (DTW) and depth to product (DTP), if present. During this monitoring event, DTW ranged from 7.95 feet below top of casing (BTOC) in monitoring well MW-8 to 22.05 feet BTOC in monitoring well MW-12. Free product was not detected at the Site during this reporting period. The observed groundwater flow direction was towards the southwest, which is consistent with historical observed groundwater flow direction. During this monitoring event, a groundwater sample was collected from groundwater monitoring well (MW-15). The maximum concentrations of dissolved-phase COCs found during the June 08, 2023 sampling event are summarized in the table below: Groundwater Monitoring and Sampling Report – 1H2023 arcadis.com 2 Maximum Groundwater Concentrations (June 8, 2023) Chemical of Concern (COC) Monitoring Well ID Concentration (µg/L) North Carolina GCL Standards Benzene MW-15 5,390 5,000 Toluene MW-15 9,330 260,000 Ethylbenzene MW-15 1,210 84,500 Xylenes MW-15 6,410 85,500 MTBE MW-15 682 20,000 Naphthalene MW-15 296 6,000 Isopropylbenzene MW-15 61.2 25,000 1,2,4- Trimethylbenzene MW-15 1,030 28,500 1,3,5- Trimethylbenzene MW-15 223 25,000 Diisopropyl Ether MW-15 184 70,000 PCE - BDL 700 TCE - BDL 3,000 EDB MW-15 BDL 50 1,2 Dichloroethane MW-15 128 400 Bromodichloromethane - BDL NSE Chloroform - BDL 70,000 n-butylbenzene - NA 6,900 Note: 1) PCE = Tetrachloroethene 2) TCE = Trichloroethene 3) MTBE = Methyl tert-butyl ether 4) EDB = Ethylene dibromide (1,2-dibromoethane) 5) NSE = No Standard Established 6) Concentrations that are Bold exceed the North Carolina Gross Contamination Levels for Groundwater (GCL) Standards 7) BDL = Below Detection Limit 8) NA = Not Analyzed Groundwater Monitoring and Sampling Report – 1H2023 arcadis.com 3 Laboratory analytical results indicate the presence of one compound above the current listed GCL Standards. Dissolved-phase concentration of benzene was detected at a concentration exceeding the North Carolina GCL Standard of 5,000 µg/L in monitoring wells MW-15 (5,390 µg/L). No other dissolved-phase COCs were detected in concentrations exceeding the applicable North Carolina GCL Standards. Overall, dissolved-phase COC concentrations have remained stable in comparison to historical groundwater analytical data. The next semi-annual groundwater monitoring and sampling event for the Site is scheduled for December 2023. All groundwater monitoring wells associated with the Site will be gauged to check for free product and to determine the potentiometric surface at the Site. Arcadis will sample groundwater monitoring well MW-15 for analysis of full list of VOC’s by Standard Method (SM) 6200B. A Semi-annual Groundwater Monitoring Report will be submitted to the NCDEQ for review and approval. Groundwater Monitoring and Sampling Report – 1H2023 arcadis.com 1 1.0 SITE HISTORY AND CHARACTERIZATION Gant Oil Company & Exprezit! Convenience Stores, LLC owned USTs which were formerly operated at the Gant Oil #823 facility located at 4325 Old Rural Hall Road in Winston Salem, North Carolina (the Site). This facility contains one permanent structure which was used as a convenience store but is now vacant. The site formerly contained (1) 7,500-gallon gasoline, (2) 3,000-gallon gasoline, (1) 4,000-gallon gasoline and (1) 2,000-gallon kerosene USTs which were used for commercial sales at this facility and removed by Gant Oil Company in October 1993. After the 1993 closure of these original USTs, Gant Oil Company installed (1) 12,000-gallon gasoline, (1) 8,000-gallon gasoline, (1) 4,000-gallon kerosene, and (1) 6,000-gallon gasoline USTs. The ownership of these USTs was transferred to Exprezit! Convenience Stores, LLC on 8/17/2001. A site location map is presented as Figure 1, and Figure 2 illustrates the layout of the site, first and second-generation UST locations, and the dispenser island locations. Exprezit! Convenience Stores, LLC employed Advanced Environmental Technologies, LLC (AET) to conduct Limited Site Assessment (LSA) and Comprehensive Site Assessment (CSA) activities in 2003 through 2004 for Incident #13998, including additional assessment activities submitted to the NCDEQ in the form of a CSA Addendum. The CSA Addendum submitted by AET identified the presence of what was believed to be two distinct source area plumes; one originating from the Gant #823 site, and the other originating to the south of the Gant site on what is the current location of a SunTrust Bank branch. AET did not identify the locations of any receptor wells within 1,000’ of the project location; however, a surface water body was identified (Leak Fork) within 500’ of the release source originating from the Gant #823 facility. The site and adjacent properties are used for commercial/residential purposes. Municipal water supply from the City of Winston Salem serves the site and is available to all properties within 1,500’. Two irrigation wells were formerly located within 250’ of the Gant source areas, side-gradient from the site. These wells were abandoned in May 2020. During UST closure operations for the second-generation USTs conducted on June 5-12, 2012, a new release was suspected at this site based on elevated PID readings observed in soil samples collected from the UST overburden and pit. This release was confirmed upon receipt of analytical results from soil samples collected during the 2012 tank closure activities. Groundwater was observed during UST excavation or during remedial activities at a depth of approximately 18’-19’ below grade. The NCDEQ assigned a new incident number for this release (#37979), and subsequently approved the over-excavation of 2,074 tons of soil to abate contaminated soils located on the Gant #823 facility. The UST owner was unresponsive in the closure of the USTs at this facility in 2012; consequently, the property owner elected to apply for Trust Fund eligibility and was subsequently granted access to reimbursement funding for the releases at this facility. As a voluntary effort to move the site towards No Further Action status, the NCDEQ approved an Electronic Preapproval Task Authorization (ePATA) for Transport Pool Corporation to proceed with completion of CSA activities. The goal of the CSA was to Groundwater Monitoring and Sampling Report – 1H2023 arcadis.com 2 delineate soil and groundwater contamination originating from the Gant #823 facility, and to ascertain whether separate down-gradient release sources are co-mingled with the Gant #823 plume. A CSA Report prepared by Enercon Services, Inc. was submitted to the NCDEQ on December 14, 2016. During the initial sampling events in 2003, GCL exceedances were noted for benzene in on-site wells MW-1, MW-2 and MW-3. At that time, Total BTEX was noted at a maximum level of 122,760 ug/l in MW-11, with benzene detected at a level of 4,590 ug/l, below its North Carolina Gross Contamination Levels (GCLs). During the February 2012 sampling event, GCL exceedances were observed in MW-11 for 6 gasoline related compounds, with a Total BTEX level of 546,700 ug/l observed in this well. During the October 2016 sampling of MW-11, the analytical laboratory noted a colorless floating layer of free product in the MW-11 sample containers, and the total BTEX concentration was noted at 3,869,000 ug/l. During the May 2017 sampling event, MW-11 was carefully gauged and found to contain 0.02’ of colorless floating free product and was not sampled for 6200B analyses. During the sampling event on October 26, 2017, the free product thickness increased to a level of 0.27’ in MW-11. Source area vertical extent well DW-1, screened from 48’ to 53’ below grade in the weathered rock aquifer, has shown a continual increase in COC concentrations, with GCL exceedances noted in this well for three compounds during the May 2017 sampling event (benzene, EDB, and 1,2-Dichloroethane). It should be noted that none of these compounds have been detected above GCLs through the history of sampling of MW-11. Further, neither EDB nor 1, 2-Dichloroethane have ever appeared in MW-11, which supports the belief that the free product and dissolved COCs in MW-11 represent a separate off-site source area. Based on evaluation of historical data and the presence of floating free product in MW- 11, the NCDEQ has determined that this free product represents a separate off-site source area for gasoline contamination. The site is situated in the Milton Belt. According to the Geological Map of North Carolina, local geology of the region is underlain with Biotite Gneiss & Schist. Weathered bedrock was encountered in some borings at depths as shallow as 12 feet below surface. The soils at the project site consist of silts, sands, and clays of varying proportions. Surface waters in the vicinity of the release area generally drain towards the west/northwest through storm sewer catch basins which empty into an unnamed intermittent stream which feeds the Leak Fork drainage system. The Leak Fork drainage system lies within the Yadkin-PeeDee River Basin. Groundwater flow at the Site is generally to the south/southwest. The Site was previously classified as High Risk based on the presence of two irrigation wells within 250’ of the site. On May 14, 2020, Arcadis personnel oversaw the abandonment of the two irrigation wells located at 4312 and 4316 Old Rural Hall Road, Winston-Salem, NC. A reduction in risk classification from “High” to “Intermediate” was approved on May 18, 2020. The new Risk Rank Abatement Score is now I134D. Groundwater Monitoring and Sampling Report – 1H2023 arcadis.com 3 Comparison of dissolved-phase COCs was subsequently changed from the North Carolina 2L Standard to the North Carolina Gross Contaminant Levels (GCLs). 2.0 FREE PRODUCT Groundwater gauging activities performed on June 8, 2023 did not indicate the presence of free product at the Site or off-site. Free product has not been observed historically in any on-site monitoring well. Free product has been historically observed periodically at the following off-site location:  Groundwater monitoring well MW-11 from October 2016 to May 2018 at a maximum apparent thickness of 0.27 feet on October 26, 2017. The floating free product observed previously in MW-11 has been determined to be from an off-site source by the NCDEQ Winston-Salem Regional Office. Current and historical free product gauging information is presented in Appendix A. Groundwater Monitoring and Sampling Report – 1H2023 arcadis.com 4 3.0 GROUNDWATER MONITORING 3.1 Groundwater Gauging On June 8, 2023, Arcadis personnel completed the 1st Half 2023 groundwater monitoring and sampling event at the Site. Sixteen (16) groundwater monitoring wells (MW-3, MW- 6, MW-7, MW-8, MW-9, MW-10, MW-11, MW-12, MW-13, MW-14, MW-15, MW-16, MW- 17, MW-18, MW-19 and MW-20) and four (4) deep groundwater monitoring wells (DW-1, DW-2, DW-3 and VEW-4) were gauged to determine the depth to water (DTW) and depth to product (DTP), if present. MW-1, MW-2 and MW-4 could not be gauged because they had been destroyed for some time, and MW-9 could not be located. Gauging was conducted with an oil/water interface probe (IP) prior to purging and sampling to determine depth to bottom (DTB), DTW, and DTP, if present. The IP and attached tape, marked in 0.01-foot increments, were properly decontaminated before each use with Alconox® soap and rinsed with distilled water. The DTW was measured from the marked survey point on the top of well casing (TOC). All measurements were recorded to the nearest 0.01-foot increment. During this monitoring event, DTW ranged from 7.95 feet below top of casing (BTOC) in monitoring well MW-8 to 22.05 feet BTOC in monitoring well MW-12. Free product was not detected at the Site during this reporting period. The observed groundwater flow direction was towards the southwest, which is consistent with historical observed groundwater flow direction. Monitoring well construction details are included in Table 1. Current groundwater elevations are summarized in Table 2. Historical groundwater gauging data is provided in Appendix A. A potentiometric surface map depicting historical groundwater flow direction for June 8, 2023 is provided as Figure 3. 3.2 Groundwater Sampling On June 8, 2023, groundwater monitoring well (MW-15) was purged of stagnant water to prepare for groundwater sampling. Prior to purging, the amount of water to be removed was calculated using the following formula: 3.1415 x r2 x (TD-DTW) x 7.481 = gallons of water (1 well volume) 3.1415 x 0.1672 x (29.50 – 14.84) x 7.481 = 9.61 gallons of water at MW-15 Where: r = radius of well (in feet) TD = total depth of well (in feet) DTW = depth to water (in feet) To ensure that the water in the wells is representative of the water in the aquifer, a minimum of three well volumes were removed. Groundwater Monitoring and Sampling Report – 1H2023 arcadis.com 5 The groundwater sample obtained from the groundwater monitoring well was collected from a disposable polyethylene bailer using new nylon rope. The sample were placed in a laboratory supplied container and shipped on wet ice to Pace Analytical Services LLC. in Huntersville, North Carolina, for analysis of full list of VOC’s by Standard Method (SM) 6200B. Groundwater samples submitted for VOC’s analysis were collected in triplicate 40-milliliter volatile organic analysis (VOA) glass vials with Teflon-lined septa screw caps preserved with hydrochloric acid. The laboratory analytical report and chain-of-custody record for the June 8, 2023 groundwater sampling event is included as Appendix B. 3.3 Groundwater Analytical Results Groundwater analytical data from the June 8, 2023 groundwater sampling event indicated the following:  Dissolved-phase concentration of benzene was detected at a concentration not exceeding the North Carolina GCL Standard of 5,000 µg/L in monitoring well MW-15 (5,390 µg/L). The maximum concentrations of dissolved-phase COCs found during the June 8, 2023 sampling event are summarized in the table below: Maximum Groundwater Concentrations (June 8, 2023) Chemical of Concern (COC) Monitoring Well ID Concentration (µg/L) North Carolina GCL Standards Benzene MW-15 5,390 5,000 Toluene MW-15 9,330 260,000 Ethylbenzene MW-15 1,210 84,500 Xylenes MW-15 6,410 85,500 MTBE MW-15 682 20,000 Naphthalene MW-15 296 6,000 Isopropylbenzene MW-15 61.2 25,000 1,2,4- Trimethylbenzene MW-15 1,030 28,500 1,3,5- Trimethylbenzene MW-15 223 25,000 Diisopropyl Ether MW-15 184 70,000 PCE - BDL 700 Groundwater Monitoring and Sampling Report – 1H2023 arcadis.com 6 TCE - BDL 3,000 EDB MW-15 BDL 50 1,2 Dichloroethane MW-15 142 400 Bromodichloromethane - BDL NSE Chloroform - BDL 70,000 n-butylbenzene - NA 6,900 Note: 1) PCE = Tetrachloroethene 2) TCE = Trichloroethene 3) MTBE = Methyl tert-butyl ether 4) EDB = Ethylene dibromide (1,2-dibromoethane) 5) NSE = No Standard Established 6) Concentrations that are Bold exceed the North Carolina Gross Contamination Levels for Groundwater (GCL) Standards 7) BDL = Below Detection Limit Laboratory analytical results indicate the presence of one compound above the current listed GCL Standards. Dissolved-phase concentration of benzene was detected at a concentration exceeding the North Carolina GCL Standard of 5,000 µg/L in monitoring wells MW-15 (5,390 µg/L). No other dissolved-phase COCs were detected in concentrations exceeding the applicable North Carolina GCL Standards. Overall, dissolved-phase COC concentrations have remained stable in comparison to historical groundwater analytical data. Current analytical groundwater data can be found in Table 3. Figure 4 shows the current groundwater analytical map. Groundwater Monitoring and Sampling Report – 1H2023 arcadis.com 7 4.0 SITE REMEDIATION Remediation activities to date are summarized in chronological order in the table below: Date Activity 2003 – 2004 LSA and CSA activities were conducted for Incident #13998. Additional assessment activities were conducted and submitted to NCDEQ in the form of a CSA Addendum. Identified presence of two distinct source area plumes; one originating from the Gant #823 site, and a second originating to the south of the Gant site on what is the current location of a SunTrust Bank branch. June 5-12, 2012 During UST closure operations, a new release was suspected at this site based on elevated PID readings observed in soil samples collected from the UST overburden and pit. Incident #37979 was issued for this release. 2,074 tons of soils were excavated to abate contaminated soils. December 14, 2016 A CSA report was submitted to NCDEQ. This helped delineate soil and groundwater contamination originating from the Gant #823 facility. December 2016 – Present Groundwater Monitored Natural Attenuation has been implemented via semi-annual sampling. May 11, 2020 Arcadis personnel oversaw the completion of one (1) eight- hour Aggressive Fluid Vapor Recovery (AFVR) event utilizing groundwater monitoring wells MW-14 and MW-15. A total of 2,361-gallons of petroleum impacted groundwater was recovered and properly disposed of at the HAZ~MAT Environmental Services L.L.C. (HAZ~MAT) facility in Charlotte, North Carolina. Approximately 1.0 pound of total petroleum hydrocarbon (TPH) mass was recovered during the May 11, 2020 AFVR event. September 18, 2020 Arcadis personnel oversaw the completion of one (1) eight- hour AFVR event utilizing deep groundwater monitoring well DW-1. A total of 623-gallons of petroleum impacted groundwater was recovered and properly disposed of at the HAZ~MAT Environmental Services L.L.C. (HAZ~MAT) facility in Charlotte, North Carolina. Approximately 0.2 pound of total petroleum hydrocarbon (TPH) mass was recovered during the September 18, 2020 AFVR event. Groundwater Monitoring and Sampling Report – 1H2023 arcadis.com 8 5.0 CONCLUSIONS AND RECOMMENDATIONS Free product was not observed at the Site during the June 8, 2023 groundwater monitoring and sampling event. Dissolved-phase concentration of benzene was detected at a concentration exceeding the North Carolina GCL Standard of 5,000 µg/L in monitoring wells MW-15 (5,390 µg/L). No other dissolved-phase COCs were detected in concentrations exceeding the applicable North Carolina GCL Standards. Overall, dissolved-phase COC concentrations have remained stable in comparison to historical groundwater analytical data. The next semi-annual groundwater monitoring and sampling event for the Site is scheduled for December 2023. All groundwater monitoring wells associated with the Site will be gauged to check for free product and to determine the potentiometric surface at the Site. Arcadis will sample groundwater monitoring well MW-15 for analysis of full list of VOC’s by Standard Method (SM) 6200B. A Semi-annual Groundwater Monitoring Report will be submitted to the NCDEQ for review and approval. TABLES Table 1 Monitoring Well Construction Details Groundwater Monitoring and Sampling Report - 1H2023 Former Gant Oil Company #823 4325 Old Rural Hall Road Winston Salem, North Carolina Well ID TOC Elevation (feet) Top of Screen Elevation (feet btoc) Bottom of Screen Elevation (feet btoc) Screen Interval Aquifer Depth to Groundwater (feet btoc) Groundwater Elevation (feet) MW-1 1,005.00 990.00 975.00 15-30 Shallow Destroyed No Data MW-2 1,005.41 990.41 975.41 15-30 Shallow Destroyed No Data MW-3 1,003.83 988.83 973.83 15-30 Shallow 13.35 990.48 MW-4 1,006.90 991.90 976.90 15-30 Shallow Paved Over No Data MW-5 1,011.32 996.32 981.32 15-30 Shallow 20.67 No Data MW-6 1,008.33 993.33 978.33 15-30 Shallow 17.76 990.57 MW-7 1,008.86 993.86 978.86 15-30 Shallow 18.05 990.81 MW-8 1,002.37 987.37 972.37 15-30 Shallow 7.95 994.42 MW-9 1,001.95 991.95 976.95 10-25 Shallow Unable to Locate No Data MW-10 1,004.86 994.86 979.86 10-25 Shallow 12.74 992.12 MW-11 1,010.12 990.12 980.12 20-30 Shallow 19.42 990.70 MW-12 1,011.51 991.51 981.51 20-30 Shallow 22.05 989.46 MW-13 1,004.81 990.81 970.81 14-34 Shallow 13.33 991.48 MW-14 1,005.90 990.90 970.90 15-35 Shallow 15.20 990.70 MW-15 1,005.46 994.46 974.46 11-31 Shallow 15.03 990.43 MW-16 1,009.78 994.78 974.78 15-35 Shallow 16.06 993.72 MW-17 1,009.33 994.33 974.33 15-35 Shallow 16.20 993.13 MW-18 1,011.46 996.46 976.46 15-35 Shallow 20.52 990.94 MW-19 1,011.36 996.36 976.36 15-35 Shallow 21.17 990.19 MW-20 1,011.40 996.40 976.40 15-35 Shallow 21.88 989.52 DW-1 1,005.91 957.91 952.91 48-53 Intermediate 15.55 990.36 DW-2 1,008.65 960.65 953.65 48-55 Intermediate 14.77 993.88 DW-3 1,006.04 936.04 931.04 70-75 Intermediate 13.38 992.66 VEW-4 1,005.93 885.93 845.93 120-160 Lower 17.35 988.58 Notes: All measurements taken in feet and based on benchmark surveyed by AET, Inc. Groundwater levels measured on12/29/2022 btoc = below top of casing TOC = top of casing N/A = not available NM = not measured Page 1 of 1 Table 2 Current Groundwater Elevation Data Groundwater Monitoring and Sampling Report - 1H2023 Former Gant Oil Company #823 4325 Old Rural Hall Road Winston Salem, North Carolina 27105 Well ID Date TOC Elevation (feet) Depth to LNAPL (feet btoc) Depth to Groundwater (feet btoc) Groundwater Elevation (feet) MW-1 6/8/2023 1,005.00 NP Destroyed No Data MW-2 6/8/2023 1,005.41 NP Destroyed No Data MW-3 6/8/2023 1,003.83 NP 13.35 990.48 MW-4 6/8/2023 1,006.90 NP Paved Over No Data MW-5 6/8/2023 1,011.32 NP 20.67 No Data MW-6 6/8/2023 1,008.33 NP 17.76 990.57 MW-7 6/8/2023 1,008.86 NP 18.05 990.81 MW-8 6/8/2023 1,002.37 NP 7.95 994.42 MW-9 6/8/2023 1,001.95 NP Unable to Locate No Data MW-10 6/8/2023 1,004.86 NP 12.74 992.12 MW-11 6/8/2023 1,010.12 NP 19.42 990.70 MW-12 6/8/2023 1,011.51 NP 22.05 989.46 MW-13 6/8/2023 1,004.81 NP 13.33 991.48 MW-14 6/8/2023 1,005.90 NP 15.20 990.70 MW-15 6/8/2023 1,005.46 NP 15.03 990.43 MW-16 6/8/2023 1,009.78 NP 16.06 993.72 MW-17 6/8/2023 1,009.33 NP 16.20 993.13 MW-18 6/8/2023 1,011.46 NP 20.52 990.94 MW-19 6/8/2023 1,011.36 NP 21.17 990.19 MW-20 6/8/2023 1,011.40 NP 21.88 989.52 DW-1 6/8/2023 1,005.91 NP 15.55 990.36 DW-2 6/8/2023 1,008.65 NP 14.77 993.88 DW-3 6/8/2023 1,006.04 NP 13.38 992.66 VEW-4 6/8/2023 1,005.93 NP 17.35 988.58 Notes: All measurements taken in feet and based on benchmark surveyed by AET, Inc. TOC = top of casing LNAPL = light non-aqueous phase liquid btoc = below top of casing -- = not available NM = not measured NP = no product Page 1 of 1 Table 3 - Current Groundwater Analytical Data Former Gant Oil Company #823 4325 Old Rural Hall Road Winston-Salem, North Carolina Well ID Date Sampled Benzene (ug/l) Toluene (ug/l) Ethylbenzene (ug/l) Xylenes (ug/l) PCE (ug/l) TCE (ug/l) Naphthalene (ug/l) EDB (ug/l) 1,2 Dichloroethane (ug/l) MTBE (ug/l) 1,2,4- Trimethylbenzene (ug/l) 1,3,5- Trimethylbenzene (ug/l) 1,2- Dichloropropane Bromodichloromethane Chloroform cis-1,2- Dichloroethene Diisopropyl Ether (DIPE)Isopropylbenzene Methylene Chloride n- butylbenzene n- propylbenzene sec- butylbenzene Styrene tert- butylbenzene NC GCL Standard 5,000 260,000 84,500 85,500 700 3,000 6,000 50 400 20,000 28,500 25,000 600 NSE 70,000 70,000 70,000 25,000 5,000 6,900 30,000 8,500 70,000 15,000 MW-3 6/8/2023 NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS MW-7 6/8/2023 NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS MW-8 6/8/2023 NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS MW-9 6/8/2023 NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS MW-10 6/8/2023 NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS MW-13 6/8/2023 NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS MW-14 6/8/2023 NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS MW-15 6/8/2023 5,390 9,330 1,210 6,410 BDL BDL 296 BDL 128 682 1,030 223 BDL BDL BDL BDL 184 61.2 BDL NA 153 NA BDL BDL MW-16 6/8/2023 NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS MW-18 6/8/2023 NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS MW-19 6/8/2023 NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS MW-20 6/8/2023 NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS DW-1 6/8/2023 NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS DW-3 6/8/2023 NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS VEW-4 6/8/2023 NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS Notes: All results reported in micrograms per liter (ug/L) GCL Standard = NC Gross Contamination Levels for groundwater. BDL = Below Detection Limits EDB = 1,2-Dibromoethane MTBE = Methyl-tert-butyl-ether PCE = Tetrachloroethylene TCE = Trichloroethylene NS = Not Sampled N/A = Not Applicable NSE = No Standard Established Bold and shaded values exceed the GCL Standards NA = Not Analyzed FIGURES NORTH CAROLINA SOURCE: USGS 7.5 MINUTE QUADRANGLE, WALKERTOWN, NC 2016 SITE LOCATION Approximate Scale: 1 in. = 2,000 ft. 0 2,000'4,000' SITE LOCATION MAP 1 FIGURE GROUNDWATER M&S REPORT - 1H2023 FORMER GANT OIL COMPANY #823 4325 OLD RURAL HALL RD, WINSTON SALEM, NORTH CAROLINA 27105AREA LOCATION IM A G E S : N C _ W a l k e r t o w n _ 2 0 1 6 0 6 2 8 _ T M o r t h _ g e o . t i f XR E F S : PR O J E C T N A M E : -- - - C:\ U s e r s \ y m b 2 6 4 0 \ A C C D o c s \ A r c a d i s \ A U S - G E - O L D R U R A L H A L L - W I N S T O N S A L E M N o r t h C a r o l i n a \ P r o j e c t F i l e s \ 2 0 2 3 \ 0 1 - I n P r o g r e s s \ 0 1 - D W G \ G E N - F 0 1 - S I T E L O C A T I O N - 1 . d w g L A Y O U T : 1 S A V E D : 6/3 0 / 2 0 2 3 7 : 3 1 P M A C A D V E R : 24 . 1 S ( L M S T E C H ) P A G E S E T U P : -- - - P L O T S T Y L E T A B L E : PL T F U L L . C T B PL O T T E D : 6/3 0 / 2 0 2 3 7 : 4 6 P M B Y : Y M , B A B U SUNTRUSTBANK EO P EO P EO P EO P EO P EOP OLD RU R A L H A L L R D ( 6 0 ' R O W ) OLD RU R A L H A L L R D FORMER USTs STOREBLDG 4314 OLD WALKERTOWNROAD BLDG OLD W A L K E R T O W N R D ( 6 0 ' R O W ) CO N L E Y S T . RANCE TILLOTSON 4309 OLD WALKERTOWN RD FORSTYH PIN #6837-85-6247.00 LEON POLLACK 4314 OLD WALKERTOWN RD FORSTYH PIN #6837-85-7552.00 CANOPY #1 CANOPY #2 EOP FORMER PUMPS AND PIPING VEW-4DW-2 DW-1DW-3 MW-10MW-13 MW-9 MW-16 MW-20 MW-19 MW-18 MW-7 MW-6 MW-11 MW-12 MW-17 MW-15 MW-3 MW-8 MW-14 MW-4 MW-5 FIGURE GROUNDWATER M&S REPORT - 1H2023 FORMER GANT OIL COMPANY #823 4325 OLD RURAL HALL RD,WINSTON SALEM, NORTH CAROLINA 27105 2 IM A G E S : XR E F S : X - T I T L E X - B A S E M A P PR O J E C T N A M E : -- - - CIT Y : ( R e q d ) D I V / G R O U P : ( R e q d ) D B : ( R e q d ) L D : ( O p t ) P I C : ( O p t ) P M : ( R e q d ) T M : ( O p t ) L Y R : ( O p t ) O N = * ; O F F = * R E F * C:\ U s e r s \ y m b 2 6 4 0 \ A C C D o c s \ A r c a d i s \ A U S - G E - O L D R U R A L H A L L - W I N S T O N S A L E M N o r t h C a r o l i n a \ P r o j e c t F i l e s \ 2 0 2 3 \ 0 1 - I n P r o g r e s s \ 0 1 - D W G \ G E N - F 0 2 - S I T E M A P . d w g L A Y O U T : 2 S A V E D : 6/ 3 0 / 2 0 2 3 7 : 3 2 P M A C A D V E R : 24 . 1 S ( L M S T E C H ) P A G E S E T U P : -- - - P L O T S T Y L E T A B L E : -- - - P L O T T E D : 6/ 3 0 / 2 0 2 3 7:4 6 P M B Y : Y M , B A B U SITE PLAN 0 80'40' APPROXIMATE SCALE 1 in. = 40 ft. LEGEND: PROPERTY LINE PRODUCT LINE GROUNDWATER MONITOR WELL LOCATION MONITORING WELL DESTROYED/PAVED OVER DEEP MONITORING WELL LOCATION VAPOR EXTRACTION WELL LOCATION MW-18 MW-4 VEW-4 DW-3 SUNTRUSTBANK EO P EO P EO P EO P EO P EOP OLD RU R A L H A L L R D ( 6 0 ' R O W ) OLD RU R A L H A L L R D FORMER USTs STOREBLDG 4314 OLD WALKERTOWNROAD BLDG OLD W A L K E R T O W N R D ( 6 0 ' R O W ) CO N L E Y S T . RANCE TILLOTSON 4309 OLD WALKERTOWN RD FORSTYH PIN #6837-85-6247.00 LEON POLLACK 4314 OLD WALKERTOWN RD FORSTYH PIN #6837-85-7552.00 CANOPY #1 CANOPY #2 EOP FORMER PUMPS AND PIPING MW-4 MW-10 (992.12) MW-13 (991.48) MW-9 (NG) MW-20 (989.52)* MW-19 (990.19) MW-18 (990.94) MW-7 (990.81) MW-6 (990.57) DW-2 (993.88)* MW-11 (990.70) MW-12 (989.46) MW-17 (993.13)* MW-15 (990.43) MW-3(990.48) MW-8 (994.42) DW-1(990.36) DW-3 (992.66)* MW-14 (990.70)VEW-4 (988.58)* MW-5 (990.65) MW-16 (993.72)* 990.00 991.00 992.00 993.00 994.00 990.00 994.00 993. 0 0 99 2 . 0 0 99 1 . 0 0 FIGURE GROUNDWATER M&S REPORT - 1H2023 FORMER GANT OIL COMPANY #823 4325 OLD RURAL HALL RD,WINSTON SALEM, NORTH CAROLINA 27105 3 IM A G E S : XR E F S : X - T I T L E X - B A S E M A P PR O J E C T N A M E : -- - - CIT Y : ( R e q d ) D I V / G R O U P : ( R e q d ) D B : ( R e q d ) L D : ( O p t ) P I C : ( O p t ) P M : ( R e q d ) T M : ( O p t ) L Y R : ( O p t ) O N = * ; O F F = * R E F * C:\ U s e r s \ y m b 2 6 4 0 \ A C C D o c s \ A r c a d i s \ A U S - G E - O L D R U R A L H A L L - W I N S T O N S A L E M N o r t h C a r o l i n a \ P r o j e c t F i l e s \ 2 0 2 3 \ 0 1 - I n P r o g r e s s \ 0 1 - D W G \ G W M - 2 0 2 3 H 1 - F 0 3 - C O N T O U R S . d w g L A Y O U T : 3 S A V E D : 6/3 0 / 2 0 2 3 7 : 4 4 P M A C A D V E R : 24 . 1 S ( L M S T E C H ) P A G E S E T U P : --- - P L O T S T Y L E T A B L E : --- - P L O T T E D : 6/3 0 / 2 0 2 3 7 : 4 5 P M B Y : Y M , B A B U POTENTIOMETRIC SURFACE MAP JUNE 8, 2023 0 80'40' APPROXIMATE SCALE 1 in. = 40 ft. LEGEND: PROPERTY LINE PRODUCT LINE GROUNDWATER MONITOR WELL LOCATION MONITORING WELL DESTROYED/PAVED OVER GROUNDWATER ELEVATION IN FEET GROUNDWATER ELEVATION CONTOUR(DASHED WHERE INFERRED) GROUNDWATER FLOW DIRECTION FEET ABOVE MEAN SEA LEVEL NOT GAUGED WELL NOT USED IN CONTOURING MW-18 MW-4 (994.42) (FT AMSL) 994.00 (NG) * SUNTRUSTBANK EO P EO P EO P EO P EO P EOP OLD RU R A L H A L L R D ( 6 0 ' R O W ) OLD RU R A L H A L L R D FORMER USTs STOREBLDG 4314 OLD WALKERTOWNROAD BLDG OLD W A L K E R T O W N R D ( 6 0 ' R O W ) CO N L E Y S T . RANCE TILLOTSON 4309 OLD WALKERTOWN RD FORSTYH PIN #6837-85-6247.00 LEON POLLACK 4314 OLD WALKERTOWN RD FORSTYH PIN #6837-85-7552.00 CANOPY #1 CANOPY #2 EOP FORMER PUMPS AND PIPING MW-10 MW-13 MW-9 MW-16 MW-20 MW-19 MW-18 MW-7 MW-6 MW-11 MW-12 MW-17 MW-15 MW-3 MW-8 MW-14 MW-4 VEW-4DW-2 DW-1 DW-3(NS) MW-5 (NS) (NS) (NS) (NS) (NS) (NS) (NS) (NS) (NS) (NS) (NS) (NS) (NS) (NS) (NS) (NS) (NS) (NS) (NS) NOTES: 1.ALL DATA REPORTED IN MICROGRAMS PER LITER (mg/L). 2.BOLD = CONCENTRATION DETECTED ABOVE NC GCL STANDARD. 3.ALL LOCATIONS ARE APPROXIMATE. 4.(NS) = NOT SAMPLED 5.NC GCL STANDARDS = NORTH CAROLINA GROSS CONTAMINANT LEVELS FOR GROUNDWATER 6.BDL = BELOW DETECTION LIMIT 7.ANALYTICAL RESULTS ONLY SHOWN FOR WELLS THAT EXCEED GCL STANDARD. FIGURE GROUNDWATER M&S REPORT - 1H2023 FORMER GANT OIL COMPANY #823 4325 OLD RURAL HALL RD,WINSTON SALEM, NORTH CAROLINA 27105 4 IM A G E S : XR E F S : X - T I T L E X - B A S E M A P PR O J E C T N A M E : -- - - CIT Y : ( R e q d ) D I V / G R O U P : ( R e q d ) D B : ( R e q d ) L D : ( O p t ) P I C : ( O p t ) P M : ( R e q d ) T M : ( O p t ) L Y R : ( O p t ) O N = * ; O F F = * R E F * C:\ U s e r s \ y m b 2 6 4 0 \ A C C D o c s \ A r c a d i s \ A U S - G E - O L D R U R A L H A L L - W I N S T O N S A L E M N o r t h C a r o l i n a \ P r o j e c t F i l e s \ 2 0 2 3 \ 0 1 - I n P r o g r e s s \ 0 1 - D W G \ G W M - 2 0 2 3 H 1 - F 0 4 - A N A L Y T E S . d w g L A Y O U T : 4 S A V E D : 6/ 3 0 / 2 0 2 3 1 2 : 1 1 P M A C A D V E R : 24 . 1 S ( L M S T E C H ) P A G E S E T U P : --- - P L O T S T Y L E T A B L E : -- - - P L O T T E D : 6/3 0 / 2 0 2 3 7 : 4 5 P M B Y : Y M , B A B U GROUNDWATER ANALYTICAL MAP JUNE 2022 TO JUNE 2023 0 80'40' APPROXIMATE SCALE 1 in. = 40 ft. LEGEND: PROPERTY LINE PRODUCT LINE GROUNDWATER MONITOR WELL LOCATION MONITORING WELL DESTROYED/PAVED OVER DEEP MONITORING WELL LOCATION VAPOR EXTRACTION WELL LOCATION MW-18 MW-4 VEW-4 DW-3 Sample ID COC Benzene 5,000 1,2-Dibromoethane (EDB) 50 NC GCL Groundwater Standard (µg/l) MW-15 Date 6/7/2022 12/29/2022 6/8/2023 Benzene 8,330 4,760 5,390 EDB 94.1 BDL BDL SUNTRUSTBANK EO P EO P EO P EO P EO P EOP OLD RU R A L H A L L R D ( 6 0 ' R O W ) OLD RU R A L H A L L R D FORMER USTs STOREBLDG 4314 OLD WALKERTOWNROAD BLDG OLD W A L K E R T O W N R D ( 6 0 ' R O W ) CO N L E Y S T . RANCE TILLOTSON 4309 OLD WALKERTOWN RD FORSTYH PIN #6837-85-6247.00 LEON POLLACK 4314 OLD WALKERTOWN RD FORSTYH PIN #6837-85-7552.00 CANOPY #1 CANOPY #2 EOP FORMER PUMPS AND PIPING MW-4 VEW-4 (NS) DW-2 (NS) DW-1 (NS)DW-3 (NS) MW-10 (NS) MW-13 (NS) MW-9(NS) MW-16 (NS) MW-20 (NS) MW-19 (NS) MW-18 (NS) MW-7 (NS) MW-6 (NS) MW-11 (NS) MW-12(NS) MW-17(NS) MW-15 (5,390) MW-3 (NS) MW-8 (NS) MW-14 (NS) MW-5 (NS) 5,000 FIGURE GROUNDWATER M&S REPORT - 1H2023 FORMER GANT OIL COMPANY #823 4325 OLD RURAL HALL RD,WINSTON SALEM, NORTH CAROLINA 27105 5 IM A G E S : XR E F S : X - T I T L E X - B A S E M A P PR O J E C T N A M E : -- - - CIT Y : ( R e q d ) D I V / G R O U P : ( R e q d ) D B : ( R e q d ) L D : ( O p t ) P I C : ( O p t ) P M : ( R e q d ) T M : ( O p t ) L Y R : ( O p t ) O N = * ; O F F = * R E F * C:\ U s e r s \ y m b 2 6 4 0 \ A C C D o c s \ A r c a d i s \ A U S - G E - O L D R U R A L H A L L - W I N S T O N S A L E M N o r t h C a r o l i n a \ P r o j e c t F i l e s \ 2 0 2 3 \ 0 1 - I n P r o g r e s s \ 0 1 - D W G \ G W M - 2 0 2 3 H 1 - F 0 5 - B E N Z E N E . d w g L A Y O U T : 5 S A V E D : 8/1 / 2 0 2 3 1 1 : 1 1 A M A C A D V E R : 24 . 1 S ( L M S T E C H ) P A G E S E T U P : -- - - P L O T S T Y L E T A B L E : --- - P L O T T E D : 8/2 / 2 0 2 3 3 : 4 0 P M B Y : Y M , B A B U BENZENE CONCENTRATION MAP JUNE 8, 2023 0 80'40' APPROXIMATE SCALE 1 in. = 40 ft. LEGEND: PROPERTY LINE PRODUCT LINE GROUNDWATER MONITOR WELL LOCATION MONITORING WELL DESTROYED/PAVED OVER DEEP MONITORING WELL LOCATION VAPOR EXTRACTION WELL LOCATION BENZENE CONCENTRATION IN MICROGRAMS PER LITER (mg/L) ESTIMATED BENZENE ISOCONCENTRATIONCONTOUR (mg/L) (GCL STANDARD) NOT SAMPLED MW-18 MW-4 (5,390) (NS) VEW-4 DW-3 5,000 APPENDIX A Historical Groundwater Elevation Data Appendix A - Historical Groundwater Elevation DataGroundwater Monitoring and Sampling Report - 1H2023 Former Gant Oil Company #8234325 Old Rural Hall Road, Winston-Salem, North Carolina Well ID Date TOC Elevation (feet)Depth to LNAPL (feet btoc) Depth to Groundwater (feet btoc) LNAPL Thickness (feet)Groundwater Elevation (feet) 4/30-5/1/2003 1,005.00 NP 19.75 NP 985.25 5/4/2003 1,005.00 NP 19.75 NP 985.25 9/24/2003 1,005.00 NP 18.05 NP 986.95 2/27/2004 1,005.00 NP 18.03 NP 986.97 2/8/2012 1,005.00 NP 17.59 NP 987.41 10/13/2016 1,005.00 5/17/2017 1,005.00 10/25/2017 1,005.00 5/31/2018 1,005.00 5/26/2020 1,005.00 12/10/2020 1,005.00 7/16/2021 1,005.00 12/20/2021 1,005.00 6/8/2023 1,005.00 4/30-5/1/2003 1,005.22 NP 20.50 NP 984.72 5/4/2003 1,005.22 NP 20.50 NP 984.72 9/24/2003 1,005.22 NP 18.38 NP 986.84 2/27/2004 1,005.22 NP 18.41 NP 986.81 2/8/2012 1,005.22 NP 18.23 NP 986.99 10/13/2016 1,005.41 5/17/2017 1,005.41 10/25/2017 1,005.41 5/31/2018 1,005.41 5/26/2020 1,005.41 12/10/2020 1,005.41 7/16/2021 1,005.41 12/20/2021 1,005.41 6/8/2023 1,005.41 4/30-5/1/2003 1,003.72 NP 18.78 NP 984.94 5/4/2003 1,003.72 NP 18.78 NP 984.94 9/24/2003 1,003.72 NP 16.78 NP 986.94 2/27/2004 1,003.72 NP 17.03 NP 986.69 2/8/2012 1,003.72 NP 16.99 NP 986.73 10/13/2016 1,003.83 NP 15.57 NP 988.26 5/17/2017 1,003.83 NP 15.68 NP 988.15 10/25/2017 1,003.83 NP 16.45 NP 987.38 5/31/2018 1,003.83 NP 16.31 NP 987.52 6/15/2019 1,003.83 NP NM NP NM 12/4/2019 1,003.83 NP 13.35 5/26/2020 1,003.83 NP 11.75 5/31/2018 1,006.90 5/26/2020 1,006.90 12/10/2020 1,006.90 7/16/2021 1,006.90 Destroyed Destroyed Destroyed Destroyed Destroyed Paved Over Destroyed Paved Over MW-2 MW-3 MW-4 Destroyed Destroyed Destroyed Destroyed MW-1 Destroyed Paved Over Destroyed Page 1 of 6 Appendix A - Historical Groundwater Elevation DataGroundwater Monitoring and Sampling Report - 1H2023 Former Gant Oil Company #8234325 Old Rural Hall Road, Winston-Salem, North Carolina Well ID Date TOC Elevation (feet) Depth to LNAPL (feet btoc) Depth to Groundwater(feet btoc) LNAPL Thickness (feet) Groundwater Elevation (feet) 9/24/2003 1,011.86 NP 24.45 NP 987.41 2/27/2004 1,011.86 NP 24.54 NP 987.32 2/8/2012 1,011.86 NP 24.62 NP 987.24 10/13/2016 1,011.32 NP 20.87 NP 990.45 5/17/2017 1,011.32 NP 23.29 NP 988.03 10/25/2017 1,011.32 NP 23.67 NP 987.65 5/31/2018 1,011.32 NP 23.78 NP 987.54 6/15/2019 1,011.32 NP 20.60 NP 990.72 12/6/2019 1,011.32 5/26/2020 1,011.32 12/10/2020 1,011.32 7/16/2021 1,011.32 12/20/2021 1,011.32 12/4/2019 1,008.33 NP 15.40 5/26/2020 1,008.33 NP 16.70 12/10/2020 1,008.33 NP 17.25 7/16/2021 1,008.33 NP 16.35 12/20/2021 1,008.33 NP 18.25 12/6/2019 1,008.86 NP 19.20 5/26/2020 1,008.86 NP 17.52 12/10/2020 1,008.86 NP 16.86 7/16/2021 1,008.86 NP 17.10 12/20/2021 1,008.86 NP 19.10 6/7/2022 1,008.86 NP 18.87 12/4/2019 1,002.37 NP 11.10 5/26/2020 1,002.37 NP 10.11 12/10/2020 1,002.37 NP 6.50 7/16/2021 1,002.37 NP 8.95 12/20/2021 1,002.37 NP 10.85 6/7/2022 1,002.37 NP 11.40 MW-7 Unable to locate MW-5 MW-6 Unable to locate MW-8 Unable to sample Unable to locate Unable to sample Page 2 of 6 Appendix A - Historical Groundwater Elevation DataGroundwater Monitoring and Sampling Report - 1H2023 Former Gant Oil Company #8234325 Old Rural Hall Road, Winston-Salem, North Carolina Well ID Date TOC Elevation (feet)Depth to LNAPL (feet btoc) Depth to Groundwater (feet btoc) LNAPL Thickness (feet)Groundwater Elevation (feet) 9/24/2003 1,002.72 NP 14.51 NP 988.21 2/27/2004 1,002.72 NP 14.78 NP 987.94 2/8/2012 1,002.72 NP 14.28 NP 988.44 5/17/2017 1,001.95 NP 12.65 NP 989.30 10/25/2017 1,001.95 NP 14.39 NP 987.56 10/13/2016 1,001.95 NP 13.02 NP 988.93 5/31/2018 1,001.95 NP 13.34 NP 988.61 6/15/2019 1,001.95 NP NM NP NM 12/4/2019 1,001.95 NP 9.40 5/26/2020 1,001.95 NP 7.85 12/10/2020 1,001.95 NP 7.85 7/16/2021 1,001.95 NP 6.87 12/20/2021 1,001.95 NP 10.05 12/5/2019 1,004.86 NP 12.55 5/26/2020 1,004.86 NP 10.94 12/10/2020 1,004.86 NP 10.72 7/16/2021 1,004.86 NP 10.64 12/20/2021 1,004.86 NP 13.21 6/7/2022 1,004.86 NP 12.70 12/5/2019 1,010.12 NP 20.00 5/26/2020 1,010.12 NP 19.21 12/10/2020 1,010.12 NP 18.26 7/16/2021 1,010.12 NP 18.17 12/20/2021 1,010.12 NP 19.87 6/7/2022 1,010.12 NP 20.40 12/5/2019 1,011.51 NP 22.60 5/26/2020 1,011.51 NP 20.97 12/10/2020 1,011.51 NP 21.15 7/16/2021 1,011.51 NP 20.25 12/20/2021 1,011.51 NP 22.50 6/7/2022 1,011.51 NP 22.24 MW-12 MW-11 MW-10 MW-9 Unable to locate Unable to locate Page 3 of 6 Appendix A - Historical Groundwater Elevation DataGroundwater Monitoring and Sampling Report - 1H2023 Former Gant Oil Company #8234325 Old Rural Hall Road, Winston-Salem, North Carolina Well ID Date TOC Elevation (feet) Depth to LNAPL (feet btoc) Depth to Groundwater (feet btoc) LNAPL Thickness (feet) Groundwater Elevation (feet) 10/13/2016 1,004.81 NP 15.83 NP 988.98 5/17/2017 1,004.81 NP 15.96 NP 988.85 10/25/2017 1,004.81 NP 16.97 NP 987.84 5/31/2018 1,004.81 NP 16.73 NP 988.08 6/15/2019 1,004.81 NP 13.35 NP 991.46 12/5/2019 1,004.81 NP 13.40 5/26/2020 1,004.81 NP 11.63 12/10/2020 1,004.81 NP 11.16 7/16/2021 1,004.81 NP 11.20 12/20/2021 1,004.81 NP 13.57 7/16/2021 12/20/2021 6/7/2022 12/4/2019 1,005.46 NP 14.94 5/26/2020 1,005.46 NP 13.53 7/16/2021 1,005.46 NP 13.02 12/20/2021 1,005.46 NP 15.00 6/7/2022 1,005.46 NP 14.84 12/6/2019 1,009.78 NP 19.70 5/26/2020 1,009.78 NP 18.17 12/10/2020 1,009.78 NP 17.80 7/16/2021 1,009.78 NP 16.77 12/20/2021 1,009.78 NP 20.00 6/7/2022 1,009.78 NP 19.32 MW-16 MW-14 MW-13 MW-15 Page 4 of 6 Appendix A - Historical Groundwater Elevation DataGroundwater Monitoring and Sampling Report - 1H2023 Former Gant Oil Company #8234325 Old Rural Hall Road, Winston-Salem, North Carolina Well ID Date TOC Elevation (feet) Depth to LNAPL (feet btoc) Depth to Groundwater (feet btoc) LNAPL Thickness (feet) Groundwater Elevation (feet) 10/13/2016 1,009.33 NP 20.44 NP 988.89 5/17/2017 1,009.33 NP 21.32 NP 988.01 10/25/2017 1,009.33 NP 21.58 NP 987.75 5/31/2018 1,009.33 NP 21.88 NP 987.45 6/15/2019 1,009.33 NP 18.00 NP 991.33 12/6/2019 1,009.33 NP 19.10 5/26/2020 1,009.33 NP 17.53 12/10/2020 1,009.33 NP 16.83 7/16/2021 1,009.33 NP 16.85 12/20/2021 1,009.33 NP 19.00 6/7/2022 1,009.33 NP 18.65 12/6/2019 1,011.46 NP 23.00 5/26/2020 1,011.46 NP 21.33 12/11/2020 1,011.46 NP 20.65 7/16/2021 1,011.46 NP 20.88 12/20/2021 1,011.46 NP 22.95 6/7/2022 1,011.46 NP 22.85 12/6/2019 1,011.36 NP 22.50 5/26/2020 1,011.36 NP 20.90 12/11/2020 1,011.36 NP 20.18 7/16/2021 1,011.36 NP 20.25 12/20/2021 1,011.36 NP 22.48 12/6/2019 1,011.40 NP 22.45 5/26/2020 1,011.40 NP 20.85 12/10/2020 1,011.40 NP 20.42 7/16/2021 1,011.40 NP 20.44 12/20/2021 1,011.40 NP 22.40 6/7/2022 1,011.40 NP 22.38 MW-17 MW-20 MW-19 MW-18 Page 5 of 6 Appendix A - Historical Groundwater Elevation DataGroundwater Monitoring and Sampling Report - 1H2023 Former Gant Oil Company #8234325 Old Rural Hall Road, Winston-Salem, North Carolina Well ID Date TOC Elevation (feet)Depth to LNAPL (feet btoc) Depth to Groundwater(feet btoc) LNAPL Thickness (feet)Groundwater Elevation (feet) 9/22/2003 1,006.30 NP 18.78 NP 987.52 2/27/2004 1,006.30 NP 18.93 NP 987.37 2/8/2012 1,006.30 NP 18.80 NP 987.50 5/17/2017 1,005.91 NP 17.50 NP 988.41 10/25/2017 1,005.91 NP 18.15 NP 987.76 10/13/2016 1,005.91 NP 16.86 NP 989.05 5/31/2018 1,005.91 NP 18.11 NP 987.80 6/15/2019 1,005.91 NP 15.02 NP 990.89 12/4/2019 1,005.91 NP 15.00 5/26/2020 1,005.91 NP 13.46 12/4/2019 1,008.65 NP 18.70 5/26/2020 1,008.65 NP 17.13 12/10/2020 1,008.65 NP 16.75 7/16/2021 1,008.65 NP 15.98 12/20/2021 1,008.65 NP 19.05 12/4/2019 1,006.04 NP 15.40 5/26/2020 1,006.04 NP 13.90 12/10/2020 1,006.04 NP 13.50 7/16/2021 1,006.04 NP 13.65 12/20/2021 1,006.04 NP 15.32 6/7/2022 1,006.04 NP 15.45 12/5/2019 1,005.93 NP 17.35 5/26/2020 1,005.93 NP 17.35 12/10/2020 1,005.93 NP 15.40 7/16/2021 1,005.93 NP 15.95 12/20/2021 1,005.93 NP 18.10 6/7/2022 1,005.93 NP 17.62 Notes: TOC = Top of casing btoc = below top of casing NP = No product indicated NM = not measured VEW-4 DW-3 DW-2 DW-1 Page 6 of 6 APPENDIX B Laboratory Analytical Report and Chain-of-Custody Record – June 8, 2023 #=CL# June 16, 2023 LIMS USE: FR - HARDIK PATEL LIMS OBJECT ID: 92671499 92671499 Project: Pace Project No.: RE: Hardik Patel Arcadis 5420 Wade Park Blvd Suite 350 Raleigh, NC 27607 GE OLD RURAL HALL Dear Hardik Patel: Enclosed are the analytical results for sample(s) received by the laboratory on June 08, 2023. The results relate only to the samples included in this report. Results reported herein conform to the applicable TNI/NELAC Standards and the laboratory's Quality Manual, where applicable, unless otherwise noted in the body of the report. The test results provided in this final report were generated by each of the following laboratories within the Pace Network: • Pace Analytical Services - Charlotte If you have any questions concerning this report, please feel free to contact me. Sincerely, Angela Baioni angela.baioni@pacelabs.com Project Manager (704)875-9092 Enclosures REPORT OF LABORATORY ANALYSIS This report shall not be reproduced, except in full, without the written consent of Pace Analytical Services, LLC. Pace Analytical Services, LLC 9800 Kincey Ave. Suite 100 Huntersville, NC 28078 (704)875-9092 Page 1 of 15 #=CP# CERTIFICATIONS Pace Project No.: Project: 92671499 GE OLD RURAL HALL Pace Analytical Services Charlotte South Carolina Laboratory ID: 99006 9800 Kincey Ave. Ste 100, Huntersville, NC 28078 North Carolina Drinking Water Certification #: 37706 North Carolina Field Services Certification #: 5342 North Carolina Wastewater Certification #: 12 South Carolina Laboratory ID: 99006 South Carolina Certification #: 99006001 South Carolina Drinking Water Cert. #: 99006003 Florida/NELAP Certification #: E87627 Kentucky UST Certification #: 84 Louisiana DoH Drinking Water #: LA029 Virginia/VELAP Certification #: 460221 REPORT OF LABORATORY ANALYSIS This report shall not be reproduced, except in full, without the written consent of Pace Analytical Services, LLC. Pace Analytical Services, LLC 9800 Kincey Ave. Suite 100 Huntersville, NC 28078 (704)875-9092 Page 2 of 15 #=SA# SAMPLE ANALYTE COUNT Pace Project No.: Project: 92671499 GE OLD RURAL HALL Lab ID Sample ID Method Analytes Reported LaboratoryAnalysts 92671499001 MW-15 SM 6200B 63 PASI-CSAS 92671499002 Trip Blank SM 6200B 63 PASI-CSAS PASI-C = Pace Analytical Services - Charlotte REPORT OF LABORATORY ANALYSIS This report shall not be reproduced, except in full, without the written consent of Pace Analytical Services, LLC. Pace Analytical Services, LLC 9800 Kincey Ave. Suite 100 Huntersville, NC 28078 (704)875-9092 Page 3 of 15 #=AR# ANALYTICAL RESULTS Pace Project No.: Project: 92671499 GE OLD RURAL HALL Sample:MW-15 Lab ID:92671499001 Collected:06/08/23 12:05 Received:06/08/23 15:55 Matrix:Water Parameters Results Units DF Prepared Analyzed CAS No.QualReport Limit Analytical Method: SM 6200B Pace Analytical Services - Charlotte 6200B MSV Benzene 5390 ug/L 06/14/23 20:56 71-43-225.0 50 Bromobenzene ND ug/L 06/14/23 20:56 108-86-125.0 50 Bromochloromethane ND ug/L 06/14/23 20:56 74-97-525.0 50 Bromodichloromethane ND ug/L 06/14/23 20:56 75-27-425.0 50 Bromoform ND ug/L 06/14/23 20:56 75-25-225.0 50 Bromomethane ND ug/L 06/14/23 20:56 74-83-925050 n-Butylbenzene ND ug/L 06/14/23 20:56 104-51-825.0 50 sec-Butylbenzene ND ug/L 06/14/23 20:56 135-98-825.0 50 tert-Butylbenzene ND ug/L 06/14/23 20:56 98-06-625.0 50 Carbon tetrachloride ND ug/L 06/14/23 20:56 56-23-525.0 50 Chlorobenzene ND ug/L 06/14/23 20:56 108-90-725.0 50 Chloroethane ND ug/L 06/14/23 20:56 75-00-350.0 50 Chloroform ND ug/L 06/14/23 20:56 67-66-325.0 50 Chloromethane ND ug/L 06/14/23 20:56 74-87-350.0 50 2-Chlorotoluene ND ug/L 06/14/23 20:56 95-49-825.0 50 4-Chlorotoluene ND ug/L 06/14/23 20:56 106-43-425.0 50 1,2-Dibromo-3-chloropropane ND ug/L 06/14/23 20:56 96-12-850.0 50 Dibromochloromethane ND ug/L 06/14/23 20:56 124-48-125.0 50 1,2-Dibromoethane (EDB)58.2 ug/L 06/14/23 20:56 106-93-425.0 50 Dibromomethane ND ug/L 06/14/23 20:56 74-95-325.0 50 1,2-Dichlorobenzene ND ug/L 06/14/23 20:56 95-50-125.0 50 1,3-Dichlorobenzene ND ug/L 06/14/23 20:56 541-73-125.0 50 1,4-Dichlorobenzene ND ug/L 06/14/23 20:56 106-46-725.0 50 Dichlorodifluoromethane ND ug/L 06/14/23 20:56 75-71-8 IH25.0 50 1,1-Dichloroethane ND ug/L 06/14/23 20:56 75-34-325.0 50 1,2-Dichloroethane 128 ug/L 06/14/23 20:56 107-06-225.0 50 1,1-Dichloroethene ND ug/L 06/14/23 20:56 75-35-425.0 50 cis-1,2-Dichloroethene ND ug/L 06/14/23 20:56 156-59-225.0 50 trans-1,2-Dichloroethene ND ug/L 06/14/23 20:56 156-60-525.0 50 1,2-Dichloropropane ND ug/L 06/14/23 20:56 78-87-525.0 50 1,3-Dichloropropane ND ug/L 06/14/23 20:56 142-28-925.0 50 2,2-Dichloropropane ND ug/L 06/14/23 20:56 594-20-725.0 50 1,1-Dichloropropene ND ug/L 06/14/23 20:56 563-58-625.0 50 cis-1,3-Dichloropropene ND ug/L 06/14/23 20:56 10061-01-525.0 50 trans-1,3-Dichloropropene ND ug/L 06/14/23 20:56 10061-02-625.0 50 Diisopropyl ether 184 ug/L 06/14/23 20:56 108-20-325.0 50 Ethylbenzene 1210 ug/L 06/14/23 20:56 100-41-425.0 50 Hexachloro-1,3-butadiene ND ug/L 06/14/23 20:56 87-68-310050 Isopropylbenzene (Cumene)61.2 ug/L 06/14/23 20:56 98-82-825.0 50 Methylene Chloride ND ug/L 06/14/23 20:56 75-09-210050 Methyl-tert-butyl ether 682 ug/L 06/14/23 20:56 1634-04-425.0 50 Naphthalene 296 ug/L 06/14/23 20:56 91-20-310050 n-Propylbenzene 153 ug/L 06/14/23 20:56 103-65-125.0 50 Styrene ND ug/L 06/14/23 20:56 100-42-525.0 50 1,1,1,2-Tetrachloroethane ND ug/L 06/14/23 20:56 630-20-625.0 50 1,1,2,2-Tetrachloroethane ND ug/L 06/14/23 20:56 79-34-525.0 50 REPORT OF LABORATORY ANALYSIS This report shall not be reproduced, except in full, without the written consent of Pace Analytical Services, LLC.Date: 06/16/2023 01:49 PM Pace Analytical Services, LLC 9800 Kincey Ave. Suite 100 Huntersville, NC 28078 (704)875-9092 Page 4 of 15 #=AR# ANALYTICAL RESULTS Pace Project No.: Project: 92671499 GE OLD RURAL HALL Sample:MW-15 Lab ID:92671499001 Collected:06/08/23 12:05 Received:06/08/23 15:55 Matrix:Water Parameters Results Units DF Prepared Analyzed CAS No.QualReport Limit Analytical Method: SM 6200B Pace Analytical Services - Charlotte 6200B MSV Tetrachloroethene 52.3 ug/L 06/14/23 20:56 127-18-425.0 50 Toluene 9330 ug/L 06/14/23 20:56 108-88-325.0 50 1,2,3-Trichlorobenzene ND ug/L 06/14/23 20:56 87-61-610050 1,2,4-Trichlorobenzene ND ug/L 06/14/23 20:56 120-82-110050 1,1,1-Trichloroethane ND ug/L 06/14/23 20:56 71-55-625.0 50 1,1,2-Trichloroethane ND ug/L 06/14/23 20:56 79-00-525.0 50 Trichloroethene ND ug/L 06/14/23 20:56 79-01-625.0 50 Trichlorofluoromethane ND ug/L 06/14/23 20:56 75-69-450.0 50 1,2,3-Trichloropropane ND ug/L 06/14/23 20:56 96-18-425.0 50 1,2,4-Trimethylbenzene 1030 ug/L 06/14/23 20:56 95-63-625.0 50 1,3,5-Trimethylbenzene 223 ug/L 06/14/23 20:56 108-67-825.0 50 Vinyl chloride ND ug/L 06/14/23 20:56 75-01-450.0 50 m&p-Xylene 4410 ug/L 06/14/23 20:56 179601-23-150.0 50 o-Xylene 2000 ug/L 06/14/23 20:56 95-47-625.0 50 Surrogates 1,2-Dichloroethane-d4 (S)97 %06/14/23 20:56 17060-07-070-130 50 4-Bromofluorobenzene (S)98 %06/14/23 20:56 460-00-470-130 50 Toluene-d8 (S)97 %06/14/23 20:56 2037-26-570-130 50 Sample:Trip Blank Lab ID:92671499002 Collected:06/08/23 00:00 Received:06/08/23 15:55 Matrix:Water Parameters Results Units DF Prepared Analyzed CAS No.QualReport Limit Analytical Method: SM 6200B Pace Analytical Services - Charlotte 6200B MSV Benzene ND ug/L 06/14/23 20:02 71-43-20.50 1 Bromobenzene ND ug/L 06/14/23 20:02 108-86-10.50 1 Bromochloromethane ND ug/L 06/14/23 20:02 74-97-50.50 1 Bromodichloromethane ND ug/L 06/14/23 20:02 75-27-40.50 1 Bromoform ND ug/L 06/14/23 20:02 75-25-20.50 1 Bromomethane ND ug/L 06/14/23 20:02 74-83-95.0 1 n-Butylbenzene ND ug/L 06/14/23 20:02 104-51-80.50 1 sec-Butylbenzene ND ug/L 06/14/23 20:02 135-98-80.50 1 tert-Butylbenzene ND ug/L 06/14/23 20:02 98-06-60.50 1 Carbon tetrachloride ND ug/L 06/14/23 20:02 56-23-50.50 1 Chlorobenzene ND ug/L 06/14/23 20:02 108-90-70.50 1 Chloroethane ND ug/L 06/14/23 20:02 75-00-31.0 1 Chloroform 1.5 ug/L 06/14/23 20:02 67-66-3 C00.50 1 Chloromethane ND ug/L 06/14/23 20:02 74-87-31.0 1 2-Chlorotoluene ND ug/L 06/14/23 20:02 95-49-80.50 1 4-Chlorotoluene ND ug/L 06/14/23 20:02 106-43-40.50 1 1,2-Dibromo-3-chloropropane ND ug/L 06/14/23 20:02 96-12-81.0 1 Dibromochloromethane ND ug/L 06/14/23 20:02 124-48-10.50 1 1,2-Dibromoethane (EDB)ND ug/L 06/14/23 20:02 106-93-40.50 1 Dibromomethane ND ug/L 06/14/23 20:02 74-95-30.50 1 REPORT OF LABORATORY ANALYSIS This report shall not be reproduced, except in full, without the written consent of Pace Analytical Services, LLC.Date: 06/16/2023 01:49 PM Pace Analytical Services, LLC 9800 Kincey Ave. Suite 100 Huntersville, NC 28078 (704)875-9092 Page 5 of 15 #=AR# ANALYTICAL RESULTS Pace Project No.: Project: 92671499 GE OLD RURAL HALL Sample:Trip Blank Lab ID:92671499002 Collected:06/08/23 00:00 Received:06/08/23 15:55 Matrix:Water Parameters Results Units DF Prepared Analyzed CAS No.QualReport Limit Analytical Method: SM 6200B Pace Analytical Services - Charlotte 6200B MSV 1,2-Dichlorobenzene ND ug/L 06/14/23 20:02 95-50-10.50 1 1,3-Dichlorobenzene ND ug/L 06/14/23 20:02 541-73-10.50 1 1,4-Dichlorobenzene ND ug/L 06/14/23 20:02 106-46-70.50 1 Dichlorodifluoromethane ND ug/L 06/14/23 20:02 75-71-8 IH0.50 1 1,1-Dichloroethane ND ug/L 06/14/23 20:02 75-34-30.50 1 1,2-Dichloroethane ND ug/L 06/14/23 20:02 107-06-20.50 1 1,1-Dichloroethene ND ug/L 06/14/23 20:02 75-35-40.50 1 cis-1,2-Dichloroethene ND ug/L 06/14/23 20:02 156-59-20.50 1 trans-1,2-Dichloroethene ND ug/L 06/14/23 20:02 156-60-50.50 1 1,2-Dichloropropane ND ug/L 06/14/23 20:02 78-87-50.50 1 1,3-Dichloropropane ND ug/L 06/14/23 20:02 142-28-90.50 1 2,2-Dichloropropane ND ug/L 06/14/23 20:02 594-20-70.50 1 1,1-Dichloropropene ND ug/L 06/14/23 20:02 563-58-60.50 1 cis-1,3-Dichloropropene ND ug/L 06/14/23 20:02 10061-01-50.50 1 trans-1,3-Dichloropropene ND ug/L 06/14/23 20:02 10061-02-60.50 1 Diisopropyl ether ND ug/L 06/14/23 20:02 108-20-30.50 1 Ethylbenzene ND ug/L 06/14/23 20:02 100-41-40.50 1 Hexachloro-1,3-butadiene ND ug/L 06/14/23 20:02 87-68-32.0 1 Isopropylbenzene (Cumene)ND ug/L 06/14/23 20:02 98-82-80.50 1 Methylene Chloride ND ug/L 06/14/23 20:02 75-09-22.0 1 Methyl-tert-butyl ether ND ug/L 06/14/23 20:02 1634-04-40.50 1 Naphthalene ND ug/L 06/14/23 20:02 91-20-32.0 1 n-Propylbenzene ND ug/L 06/14/23 20:02 103-65-10.50 1 Styrene ND ug/L 06/14/23 20:02 100-42-50.50 1 1,1,1,2-Tetrachloroethane ND ug/L 06/14/23 20:02 630-20-60.50 1 1,1,2,2-Tetrachloroethane ND ug/L 06/14/23 20:02 79-34-50.50 1 Tetrachloroethene ND ug/L 06/14/23 20:02 127-18-40.50 1 Toluene ND ug/L 06/14/23 20:02 108-88-30.50 1 1,2,3-Trichlorobenzene ND ug/L 06/14/23 20:02 87-61-62.0 1 1,2,4-Trichlorobenzene ND ug/L 06/14/23 20:02 120-82-12.0 1 1,1,1-Trichloroethane ND ug/L 06/14/23 20:02 71-55-60.50 1 1,1,2-Trichloroethane ND ug/L 06/14/23 20:02 79-00-50.50 1 Trichloroethene ND ug/L 06/14/23 20:02 79-01-60.50 1 Trichlorofluoromethane ND ug/L 06/14/23 20:02 75-69-41.0 1 1,2,3-Trichloropropane ND ug/L 06/14/23 20:02 96-18-40.50 1 1,2,4-Trimethylbenzene ND ug/L 06/14/23 20:02 95-63-60.50 1 1,3,5-Trimethylbenzene ND ug/L 06/14/23 20:02 108-67-80.50 1 Vinyl chloride ND ug/L 06/14/23 20:02 75-01-41.0 1 m&p-Xylene ND ug/L 06/14/23 20:02 179601-23-11.0 1 o-Xylene ND ug/L 06/14/23 20:02 95-47-60.50 1 Surrogates 1,2-Dichloroethane-d4 (S)97 %06/14/23 20:02 17060-07-070-130 1 4-Bromofluorobenzene (S)98 %06/14/23 20:02 460-00-470-130 1 Toluene-d8 (S)99 %06/14/23 20:02 2037-26-570-130 1 REPORT OF LABORATORY ANALYSIS This report shall not be reproduced, except in full, without the written consent of Pace Analytical Services, LLC.Date: 06/16/2023 01:49 PM Pace Analytical Services, LLC 9800 Kincey Ave. Suite 100 Huntersville, NC 28078 (704)875-9092 Page 6 of 15 #=QC# QUALITY CONTROL DATA Pace Project No.: Project: 92671499 GE OLD RURAL HALL Results presented on this page are in the units indicated by the "Units" column except where an alternate unit is presented to the right of the result. QC Batch: QC Batch Method: Analysis Method: Analysis Description: 780528 SM 6200B SM 6200B 6200B MSV Laboratory:Pace Analytical Services - Charlotte Associated Lab Samples:92671499001, 92671499002 Parameter Units Blank Result Reporting Limit Qualifiers METHOD BLANK:4049079 Associated Lab Samples:92671499001, 92671499002 Matrix:Water Analyzed 1,1,1,2-Tetrachloroethane ug/L ND 0.50 06/14/23 19:08 1,1,1-Trichloroethane ug/L ND 0.50 06/14/23 19:08 1,1,2,2-Tetrachloroethane ug/L ND 0.50 06/14/23 19:08 1,1,2-Trichloroethane ug/L ND 0.50 06/14/23 19:08 1,1-Dichloroethane ug/L ND 0.50 06/14/23 19:08 1,1-Dichloroethene ug/L ND 0.50 06/14/23 19:08 1,1-Dichloropropene ug/L ND 0.50 06/14/23 19:08 1,2,3-Trichlorobenzene ug/L ND 2.0 06/14/23 19:08 1,2,3-Trichloropropane ug/L ND 0.50 06/14/23 19:08 1,2,4-Trichlorobenzene ug/L ND 2.0 06/14/23 19:08 1,2,4-Trimethylbenzene ug/L ND 0.50 06/14/23 19:08 1,2-Dibromo-3-chloropropane ug/L ND 1.0 06/14/23 19:08 1,2-Dibromoethane (EDB)ug/L ND 0.50 06/14/23 19:08 1,2-Dichlorobenzene ug/L ND 0.50 06/14/23 19:08 1,2-Dichloroethane ug/L ND 0.50 06/14/23 19:08 1,2-Dichloropropane ug/L ND 0.50 06/14/23 19:08 1,3,5-Trimethylbenzene ug/L ND 0.50 06/14/23 19:08 1,3-Dichlorobenzene ug/L ND 0.50 06/14/23 19:08 1,3-Dichloropropane ug/L ND 0.50 06/14/23 19:08 1,4-Dichlorobenzene ug/L ND 0.50 06/14/23 19:08 2,2-Dichloropropane ug/L ND 0.50 06/14/23 19:08 2-Chlorotoluene ug/L ND 0.50 06/14/23 19:08 4-Chlorotoluene ug/L ND 0.50 06/14/23 19:08 Benzene ug/L ND 0.50 06/14/23 19:08 Bromobenzene ug/L ND 0.50 06/14/23 19:08 Bromochloromethane ug/L ND 0.50 06/14/23 19:08 Bromodichloromethane ug/L ND 0.50 06/14/23 19:08 Bromoform ug/L ND 0.50 06/14/23 19:08 Bromomethane ug/L ND 5.0 06/14/23 19:08 Carbon tetrachloride ug/L ND 0.50 06/14/23 19:08 Chlorobenzene ug/L ND 0.50 06/14/23 19:08 Chloroethane ug/L ND 1.0 06/14/23 19:08 Chloroform ug/L ND 0.50 06/14/23 19:08 Chloromethane ug/L ND 1.0 06/14/23 19:08 cis-1,2-Dichloroethene ug/L ND 0.50 06/14/23 19:08 cis-1,3-Dichloropropene ug/L ND 0.50 06/14/23 19:08 Dibromochloromethane ug/L ND 0.50 06/14/23 19:08 Dibromomethane ug/L ND 0.50 06/14/23 19:08 Dichlorodifluoromethane ug/L ND 0.50 IH06/14/23 19:08 Diisopropyl ether ug/L ND 0.50 06/14/23 19:08 REPORT OF LABORATORY ANALYSIS This report shall not be reproduced, except in full, without the written consent of Pace Analytical Services, LLC.Date: 06/16/2023 01:49 PM Pace Analytical Services, LLC 9800 Kincey Ave. Suite 100 Huntersville, NC 28078 (704)875-9092 Page 7 of 15 #=QC# QUALITY CONTROL DATA Pace Project No.: Project: 92671499 GE OLD RURAL HALL Results presented on this page are in the units indicated by the "Units" column except where an alternate unit is presented to the right of the result. Parameter Units Blank Result Reporting Limit Qualifiers METHOD BLANK:4049079 Associated Lab Samples:92671499001, 92671499002 Matrix:Water Analyzed Ethylbenzene ug/L ND 0.50 06/14/23 19:08 Hexachloro-1,3-butadiene ug/L ND 2.0 06/14/23 19:08 Isopropylbenzene (Cumene)ug/L ND 0.50 06/14/23 19:08 m&p-Xylene ug/L ND 1.0 06/14/23 19:08 Methyl-tert-butyl ether ug/L ND 0.50 06/14/23 19:08 Methylene Chloride ug/L ND 2.0 06/14/23 19:08 n-Butylbenzene ug/L ND 0.50 06/14/23 19:08 n-Propylbenzene ug/L ND 0.50 06/14/23 19:08 Naphthalene ug/L ND 2.0 06/14/23 19:08 o-Xylene ug/L ND 0.50 06/14/23 19:08 sec-Butylbenzene ug/L ND 0.50 06/14/23 19:08 Styrene ug/L ND 0.50 06/14/23 19:08 tert-Butylbenzene ug/L ND 0.50 06/14/23 19:08 Tetrachloroethene ug/L ND 0.50 06/14/23 19:08 Toluene ug/L ND 0.50 06/14/23 19:08 trans-1,2-Dichloroethene ug/L ND 0.50 06/14/23 19:08 trans-1,3-Dichloropropene ug/L ND 0.50 06/14/23 19:08 Trichloroethene ug/L ND 0.50 06/14/23 19:08 Trichlorofluoromethane ug/L ND 1.0 06/14/23 19:08 Vinyl chloride ug/L ND 1.0 06/14/23 19:08 1,2-Dichloroethane-d4 (S)%96 70-130 06/14/23 19:08 4-Bromofluorobenzene (S)%97 70-130 06/14/23 19:08 Toluene-d8 (S)%99 70-130 06/14/23 19:08 Parameter Units LCS Result % Rec Limits Qualifiers% RecConc. 4049080LABORATORY CONTROL SAMPLE: LCSSpike 1,1,1,2-Tetrachloroethane ug/L 20.320 101 60-140 1,1,1-Trichloroethane ug/L 20.020 100 60-140 1,1,2,2-Tetrachloroethane ug/L 20.020 100 60-140 1,1,2-Trichloroethane ug/L 20.320 102 60-140 1,1-Dichloroethane ug/L 20.120 101 60-140 1,1-Dichloroethene ug/L 21.820 109 60-140 1,1-Dichloropropene ug/L 21.120 105 60-140 1,2,3-Trichlorobenzene ug/L 20.820 104 60-140 1,2,3-Trichloropropane ug/L 18.820 94 60-140 1,2,4-Trichlorobenzene ug/L 20.820 104 60-140 1,2,4-Trimethylbenzene ug/L 21.020 105 60-140 1,2-Dibromo-3-chloropropane ug/L 19.920 100 60-140 1,2-Dibromoethane (EDB)ug/L 21.120 106 60-140 1,2-Dichlorobenzene ug/L 20.220 101 60-140 1,2-Dichloroethane ug/L 20.020 100 60-140 1,2-Dichloropropane ug/L 20.620 103 60-140 1,3,5-Trimethylbenzene ug/L 20.320 101 60-140 REPORT OF LABORATORY ANALYSIS This report shall not be reproduced, except in full, without the written consent of Pace Analytical Services, LLC.Date: 06/16/2023 01:49 PM Pace Analytical Services, LLC 9800 Kincey Ave. Suite 100 Huntersville, NC 28078 (704)875-9092 Page 8 of 15 #=QC# QUALITY CONTROL DATA Pace Project No.: Project: 92671499 GE OLD RURAL HALL Results presented on this page are in the units indicated by the "Units" column except where an alternate unit is presented to the right of the result. Parameter Units LCS Result % Rec Limits Qualifiers% RecConc. 4049080LABORATORY CONTROL SAMPLE: LCSSpike 1,3-Dichlorobenzene ug/L 19.920 99 60-140 1,3-Dichloropropane ug/L 19.620 98 60-140 1,4-Dichlorobenzene ug/L 19.420 97 60-140 2,2-Dichloropropane ug/L 19.520 98 60-140 2-Chlorotoluene ug/L 19.520 98 60-140 4-Chlorotoluene ug/L 20.420 102 60-140 Benzene ug/L 20.120 101 60-140 Bromobenzene ug/L 19.820 99 60-140 Bromochloromethane ug/L 20.120 100 60-140 Bromodichloromethane ug/L 19.520 97 60-140 Bromoform ug/L 19.120 96 60-140 Bromomethane ug/L 17.920 89 60-140 Carbon tetrachloride ug/L 20.120 100 60-140 Chlorobenzene ug/L 19.920 100 60-140 Chloroethane ug/L 20.220 101 60-140 Chloroform ug/L 19.520 97 60-140 Chloromethane ug/L 20.120 100 60-140 cis-1,2-Dichloroethene ug/L 20.320 101 60-140 cis-1,3-Dichloropropene ug/L 20.620 103 60-140 Dibromochloromethane ug/L 20.720 104 60-140 Dibromomethane ug/L 21.920 109 60-140 Dichlorodifluoromethane ug/L 26.0 IH2013060-140 Diisopropyl ether ug/L 20.020 100 60-140 Ethylbenzene ug/L 19.520 98 60-140 Hexachloro-1,3-butadiene ug/L 20.720 103 60-140 Isopropylbenzene (Cumene)ug/L 20.420 102 60-140 m&p-Xylene ug/L 39.740 99 60-140 Methyl-tert-butyl ether ug/L 19.620 98 60-140 Methylene Chloride ug/L 19.320 96 60-140 n-Butylbenzene ug/L 20.320 101 60-140 n-Propylbenzene ug/L 19.620 98 60-140 Naphthalene ug/L 22.320 111 60-140 o-Xylene ug/L 20.120 101 60-140 sec-Butylbenzene ug/L 19.920 99 60-140 Styrene ug/L 21.320 107 60-140 tert-Butylbenzene ug/L 16.320 82 60-140 Tetrachloroethene ug/L 19.120 95 60-140 Toluene ug/L 19.020 95 60-140 trans-1,2-Dichloroethene ug/L 21.020 105 60-140 trans-1,3-Dichloropropene ug/L 20.420 102 60-140 Trichloroethene ug/L 20.220 101 60-140 Trichlorofluoromethane ug/L 20.320 101 60-140 Vinyl chloride ug/L 18.420 92 60-140 1,2-Dichloroethane-d4 (S)%97 70-130 4-Bromofluorobenzene (S)%101 70-130 Toluene-d8 (S)%97 70-130 REPORT OF LABORATORY ANALYSIS This report shall not be reproduced, except in full, without the written consent of Pace Analytical Services, LLC.Date: 06/16/2023 01:49 PM Pace Analytical Services, LLC 9800 Kincey Ave. Suite 100 Huntersville, NC 28078 (704)875-9092 Page 9 of 15 #=QC# QUALITY CONTROL DATA Pace Project No.: Project: 92671499 GE OLD RURAL HALL Results presented on this page are in the units indicated by the "Units" column except where an alternate unit is presented to the right of the result. Parameter Units MS Result % Rec Limits Qual% RecConc. 4049081MATRIX SPIKE & MATRIX SPIKE DUPLICATE: MSSpike Result 92671858007 4049082 MSD Result MSD % Rec RPD MSDMS Spike Conc. 1,1,1,2-Tetrachloroethane ug/L 20 119 60-140116 220ND23.7 23.2 1,1,1-Trichloroethane ug/L 20 121 60-140119 220ND24.2 23.7 1,1,2,2-Tetrachloroethane ug/L 20 111 60-140110 120ND22.2 21.9 1,1,2-Trichloroethane ug/L 20 112 60-140110 220ND22.5 22.1 1,1-Dichloroethane ug/L 20 117 60-140113 320ND23.3 22.6 1,1-Dichloroethene ug/L 20 137 60-140133 320ND27.5 26.6 1,1-Dichloropropene ug/L 20 133 60-140128 320ND26.5 25.7 1,2,3-Trichlorobenzene ug/L 20 123 60-140118 420ND24.6 23.6 1,2,3-Trichloropropane ug/L 20 104 60-140102 220ND20.8 20.4 1,2,4-Trichlorobenzene ug/L 20 124 60-140118 520ND24.7 23.5 1,2,4-Trimethylbenzene ug/L 20 124 60-140117 620ND24.8 23.4 1,2-Dibromo-3-chloropropane ug/L 20 109 60-140108 020ND21.7 21.6 1,2-Dibromoethane (EDB)ug/L 20 117 60-140115 220ND23.4 22.9 1,2-Dichlorobenzene ug/L 20 118 60-140111 620ND23.5 22.3 1,2-Dichloroethane ug/L 20 110 60-140109 020ND22.0 21.9 1,2-Dichloropropane ug/L 20 117 60-140117 120ND23.4 23.3 1,3,5-Trimethylbenzene ug/L 20 121 60-140116 420ND24.3 23.2 1,3-Dichlorobenzene ug/L 20 118 60-140112 520ND23.6 22.4 1,3-Dichloropropane ug/L 20 111 60-140110 120ND22.2 22.0 1,4-Dichlorobenzene ug/L 20 114 60-140109 420ND22.9 21.9 2,2-Dichloropropane ug/L 20 123 60-140119 320ND24.6 23.9 2-Chlorotoluene ug/L 20 115 60-140109 520ND22.9 21.9 4-Chlorotoluene ug/L 20 120 60-140113 520ND23.9 22.7 Benzene ug/L 20 120 60-140116 420ND24.0 23.2 Bromobenzene ug/L 20 113 60-140111 220ND22.6 22.2 Bromochloromethane ug/L 20 112 60-140111 120ND22.5 22.2 Bromodichloromethane ug/L 20 113 60-140110 320ND22.6 21.9 Bromoform ug/L 20 105 60-140105 020ND21.1 21.0 Bromomethane ug/L 20 98 60-14098 020ND19.7 19.6 Carbon tetrachloride ug/L 20 128 60-140124 420ND25.7 24.8 Chlorobenzene ug/L 20 116 60-140113 220ND23.1 22.6 Chloroethane ug/L 20 122 60-140119 320ND24.5 23.7 Chloroform ug/L 20 110 60-140111 120ND22.0 22.2 Chloromethane ug/L 20 116 60-140113 320ND23.2 22.5 cis-1,2-Dichloroethene ug/L 20 115 60-140114 220ND23.1 22.7 cis-1,3-Dichloropropene ug/L 20 115 60-140113 220ND23.1 22.5 Dibromochloromethane ug/L 20 120 60-140116 320ND23.9 23.3 Dibromomethane ug/L 20 121 60-140119 220ND24.3 23.8 Dichlorodifluoromethane ug/L IH,M12016560-140161 220ND33.0 32.2 Diisopropyl ether ug/L 20 111 60-140109 120ND22.2 21.9 Ethylbenzene ug/L 20 116 60-140112 320ND23.3 22.5 Hexachloro-1,3-butadiene ug/L M12014360-140133 820ND28.7 26.6 Isopropylbenzene (Cumene)ug/L 20 124 60-140120 320ND24.8 24.0 m&p-Xylene ug/L 40 118 60-140115 240ND47.1 46.1 Methyl-tert-butyl ether ug/L 20 105 60-140104 120ND21.0 20.9 Methylene Chloride ug/L 20 110 60-140107 320ND22.1 21.3 REPORT OF LABORATORY ANALYSIS This report shall not be reproduced, except in full, without the written consent of Pace Analytical Services, LLC.Date: 06/16/2023 01:49 PM Pace Analytical Services, LLC 9800 Kincey Ave. Suite 100 Huntersville, NC 28078 (704)875-9092 Page 10 of 15 #=QC# QUALITY CONTROL DATA Pace Project No.: Project: 92671499 GE OLD RURAL HALL Results presented on this page are in the units indicated by the "Units" column except where an alternate unit is presented to the right of the result. Parameter Units MS Result % Rec Limits Qual% RecConc. 4049081MATRIX SPIKE & MATRIX SPIKE DUPLICATE: MSSpike Result 92671858007 4049082 MSD Result MSD % Rec RPD MSDMS Spike Conc. n-Butylbenzene ug/L 20 131 60-140122 720ND26.2 24.4 n-Propylbenzene ug/L 20 119 60-140112 620ND23.8 22.4 Naphthalene ug/L 20 121 60-140116 420ND24.2 23.3 o-Xylene ug/L 20 117 60-140114 220ND23.3 22.8 sec-Butylbenzene ug/L 20 127 60-140118 720ND25.4 23.7 Styrene ug/L 20 121 60-140121 020ND24.3 24.2 tert-Butylbenzene ug/L 20 102 60-14096 720ND20.4 19.1 Tetrachloroethene ug/L 20 121 60-140117 320ND24.2 23.4 Toluene ug/L 20 113 60-140109 320ND22.6 21.8 trans-1,2-Dichloroethene ug/L 20 127 60-140122 420ND25.4 24.3 trans-1,3-Dichloropropene ug/L 20 115 60-140114 120ND22.9 22.8 Trichloroethene ug/L 20 123 60-140120 320ND24.6 24.0 Trichlorofluoromethane ug/L 20 139 60-140133 420ND27.8 26.7 Vinyl chloride ug/L 20 116 60-140110 520ND23.3 22.1 1,2-Dichloroethane-d4 (S)%94 70-13095 4-Bromofluorobenzene (S)%99 70-13099 Toluene-d8 (S)%97 70-13095 REPORT OF LABORATORY ANALYSIS This report shall not be reproduced, except in full, without the written consent of Pace Analytical Services, LLC.Date: 06/16/2023 01:49 PM Pace Analytical Services, LLC 9800 Kincey Ave. Suite 100 Huntersville, NC 28078 (704)875-9092 Page 11 of 15 #=QL# QUALIFIERS Pace Project No.: Project: 92671499 GE OLD RURAL HALL DEFINITIONS DF - Dilution Factor, if reported, represents the factor applied to the reported data due to dilution of the sample aliquot. ND - Not Detected at or above adjusted reporting limit. TNTC - Too Numerous To Count J - Estimated concentration above the adjusted method detection limit and below the adjusted reporting limit. MDL - Adjusted Method Detection Limit. PQL - Practical Quantitation Limit. RL - Reporting Limit - The lowest concentration value that meets project requirements for quantitative data with known precision and bias for a specific analyte in a specific matrix. S - Surrogate 1,2-Diphenylhydrazine decomposes to and cannot be separated from Azobenzene using Method 8270. The result for each analyte is a combined concentration. Consistent with EPA guidelines, unrounded data are displayed and have been used to calculate % recovery and RPD values. LCS(D) - Laboratory Control Sample (Duplicate) MS(D) - Matrix Spike (Duplicate) DUP - Sample Duplicate RPD - Relative Percent Difference NC - Not Calculable. SG - Silica Gel - Clean-Up U - Indicates the compound was analyzed for, but not detected. Acid preservation may not be appropriate for 2 Chloroethylvinyl ether. A separate vial preserved to a pH of 4-5 is recommended in SW846 Chapter 4 for the analysis of Acrolein and Acrylonitrile by EPA Method 8260. N-Nitrosodiphenylamine decomposes and cannot be separated from Diphenylamine using Method 8270. The result reported for each analyte is a combined concentration. Reported results are not rounded until the final step prior to reporting. Therefore, calculated parameters that are typically reported as "Total" may vary slightly from the sum of the reported component parameters. Pace Analytical is TNI accredited. Contact your Pace PM for the current list of accredited analytes. TNI - The NELAC Institute. ANALYTE QUALIFIERS Result confirmed by second analysis.C0 This analyte exceeded secondary source verification criteria high for the initial calibration. The reported results should be considered an estimated value.IH Matrix spike recovery exceeded QC limits. Batch accepted based on laboratory control sample (LCS) recovery.M1 REPORT OF LABORATORY ANALYSIS This report shall not be reproduced, except in full, without the written consent of Pace Analytical Services, LLC.Date: 06/16/2023 01:49 PM Pace Analytical Services, LLC 9800 Kincey Ave. Suite 100 Huntersville, NC 28078 (704)875-9092 Page 12 of 15 #=CR# QUALITY CONTROL DATA CROSS REFERENCE TABLE Pace Project No.: Project: 92671499 GE OLD RURAL HALL Lab ID Sample ID QC Batch Method QC Batch Analytical Method Analytical Batch 92671499001 780528MW-15 SM 6200B 92671499002 780528Trip Blank SM 6200B REPORT OF LABORATORY ANALYSIS This report shall not be reproduced, except in full, without the written consent of Pace Analytical Services, LLC.Date: 06/16/2023 01:49 PM Pace Analytical Services, LLC 9800 Kincey Ave. Suite 100 Huntersville, NC 28078 (704)875-9092 Page 13 of 15 Page 14 of 15 Page 15 of 15 APPENDIX C Historical Groundwater Analytical Data Appendix C1 - Groundwater Analytical Data Groundwater Monitoring and Sampling Report - 1H2023 Former Gant Oil Company #823 4325 Old Rural Hall Road, Winston-Salem, North Carolina Well ID Date Sampled Benzene (ug/l) Toluene (ug/l) Ethylbenzene (ug/l) Xylenes (ug/l) TOTAL BTEX (ug/l) PCE (ug/l) TCE (ug/l) Naphthalene (ug/l) EDB (ug/l) 1,2 Dichloroethane (ug/l) MTBE (ug/l) 1,2,4- Trimethylbenze (ug/l) 1,3,5- Trimethylbenze (ug/l) NC GCL Standard 5,000 260,000 84,500 85,500 N/A 700 3,000 6,000 50 400 20,000 28,500 25,000 5/4/2003 6,510 11,100 1,350 7,330 26,290 BDL BDL 263 34.6 <5 2,000 1,030 295 9/24/2003 6,380 10,300 1,320 7,490 25,490 NA NA 319 71.2 699 2,310 1,160 480 2/8/2012 370 430 470 2,800 4,070 BDL BDL 540 BDL 28 2,500 1,500 650 5/4/2003 17,600 38,600 3,210 18,190 77,600 BDL BDL 159 224 <5 4,160 1,720 671 9/24/2003 16,400 39,800 3,420 18,900 78,520 NA NA 555 148 472 4,070 1,650 579 2/8/2012 5,300 41,000 4,800 27,000 78,100 BDL BDL 750 BDL BDL BDL 3,100 820 5/4/2003 3,570 16,500 2,600 12,980 35,650 NA NA 146 8.2 <10 <10 2,280 721 9/24/2003 5,260 26,800 3,750 19,170 54,980 BDL BDL 578 16.8 BDL BDL 3,020 723 2/8/2012 310 10,000 2,900 16,000 29,210 1,200 91 670 BDL BDL BDL 2,900 680 10/13/2016 81.3 5,680 2,850 13,650 22,261.3 261 163 595 BDL BDL BDL 2,720 653 5/17/2017 34.8 2,090 1,500 7,710 11,335 665 220 519 BDL BDL BDL 1,600 BDL 10/26/2017 110 6,100 4,000 19,000 29,210 120 90 890 BDL BDL BDL 4,000 840 5/31/2018 42 2,100 1,400 7,300 10,842 600 200 600 BDL BDL BDL 1,500 640 12/4/2019 33.5 2,280 2,060 10,600 14,974 48.7 29.1 607 BDL BDL BDL 2,580 BDL 5/27/2020 BDL 1,140 1,460 8,760 11,360 80.4 46 501 BDL BDL BDL 2,090 BDL 12/10/2020 BDL 1,030 1,360 7,600 9,990 378 39.2 485 BDL BDL BDL 1,900 BDL 9/24/2003 BDL BDL BDL BDL 0 BDL BDL 1.1 BDL BDL BDL <1 <1 2/8/2012 BDL BDL BDL BDL 0 320 1.4 BDL BDL BDL BDL BDL BDL 9/24/2003 BDL BDL BDL BDL 0 BDL BDL <1 BDL BDL BDL <1 <1 2/8/2012 BDL BDL BDL BDL 0 150 0.57 BDL BDL BDL BDL BDL BDL 10/13/2016 BDL BDL BDL BDL 0 7.3 BDL BDL BDL BDL BDL BDL BDL 5/17/2017 BDL BDL BDL BDL 0 7 BDL BDL BDL BDL BDL BDL BDL 10/26/2017 BDL BDL BDL BDL 0 8.3 BDL BDL BDL BDL BDL BDL BDL 5/31/2018 BDL BDL BDL BDL 0 28 BDL BDL BDL BDL BDL BDL BDL 6/15/2019 BDL BDL BDL BDL BDL BDL 11 BDL BDL BDL BDL BDL BDL 9/24/2003 866 13 338 1,359 2,576 BDL BDL 22.9 BDL BDL 211 460 77.4 2/8/2012 300 2.8 200 580 1,083 BDL BDL 53 BDL BDL 5.7 360 95 10/13/2016 72.6 0.84 74 224.1 371 BDL BDL 50 BDL BDL 53.6 185 60 5/17/2017 519 5.4 48.9 91 665 BDL BDL 36 BDL 2.5 668 55 29.7 10/26/2017 260 1 130 170 561 BDL BDL 13 BDL BDL 43 76 49 5/31/2018 82 2 25 130 239 BDL BDL 1.6 BDL BDL 4.8 19 17 9/24/2003 138 39 140 900 1,217 BDL BDL 104 BDL BDL BDL 663 168 2/8/2012 3.8 7.9 23 690 725 BDL BDL 190 BDL BDL BDL 1,000 310 10/13/2016 BDL 6.3 21.6 482 510 BDL BDL 111 BDL BDL BDL 700 251 5/17/2017 2.6 4.6 16.4 528 552 BDL BDL 115 BDL BDL BDL 801 BDL 10/26/2017 BDL 2 14 1,100 1,116 BDL BDL 140 BDL BDL BDL 550 830 5/31/2018 1 1 9 370 381 BDL BDL 82 BDL BDL BDL 500 190 6/15/2019 BDL BDL 4.3 136.2 140.5 BDL BDL 31.3 BDL BDL BDL 163 62.5 12/6/2019 BDL BDL 7 189.9 196.9 BDL BDL 27.1 BDL BDL BDL 183 86.5 5/27/2020 BDL BDL 8.8 146.2 155 BDL BDL 57.4 BDL BDL BDL 203 BDL 12/10/2020 BDL BDL 8 143.2 151 BDL BDL 42.4 BDL BDL BDL 183 BDL 9/24/2003 BDL BDL BDL BDL 0 BDL BDL <1 BDL BDL BDL <1 <1 2/8/2012 BDL BDL BDL BDL 0 BDL BDL BDL BDL BDL BDL BDL BDL 10/13/2016 BDL BDL BDL BDL 0 BDL BDL BDL BDL BDL BDL BDL BDL 5/17/2017 BDL BDL BDL BDL 0 BDL BDL BDL BDL BDL BDL BDL BDL 10/26/2017 BDL BDL BDL BDL 0 BDL BDL BDL BDL BDL BDL BDL BDL 5/31/2018 BDL BDL BDL BDL 0 BDL BDL BDL BDL BDL BDL BDL BDL 12/4/2019 BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL MW-1 MW-2 MW-4 MW-7 MW-5 MW-3 MW-6 MW-8 Appendix C1 - Groundwater Analytical Data Groundwater Monitoring and Sampling Report - 1H2023 Former Gant Oil Company #823 4325 Old Rural Hall Road, Winston-Salem, North Carolina Well ID Date Sampled Benzene (ug/l) Toluene (ug/l) Ethylbenzene (ug/l) Xylenes (ug/l) TOTAL BTEX (ug/l) PCE (ug/l) TCE (ug/l) Naphthalene (ug/l) EDB (ug/l) 1,2 Dichloroethane (ug/l) MTBE (ug/l) 1,2,4- Trimethylbenze (ug/l) 1,3,5- Trimethylbenze (ug/l) NC GCL Standard 5,000 260,000 84,500 85,500 N/A 700 3,000 6,000 50 400 20,000 28,500 25,000 9/24/2003 BDL BDL BDL BDL 0 BDL BDL 5.8 BDL BDL 19.4 2.6 <1 2/8/2012 BDL BDL BDL BDL 0 7.2 BDL BDL BDL BDL BDL BDL BDL 10/13/2016 BDL BDL BDL BDL 0 6.8 8.3 BDL BDL BDL BDL BDL BDL 5/17/2017 BDL BDL BDL BDL 0 22.2 BDL BDL BDL BDL BDL BDL BDL 10/26/2017 BDL BDL BDL BDL 0 19 BDL BDL BDL BDL BDL BDL BDL 5/31/2018 BDL BDL BDL BDL 0 21 BDL BDL BDL BDL BDL BDL BDL 12/4/2019 BDL BDL BDL BDL BDL 3.6 BDL BDL BDL BDL BDL BDL BDL 5/29/2020 BDL BDL BDL BDL BDL 2.3 BDL BDL BDL BDL BDL BDL BDL 9/24/2003 <1 <1 <1 <3 BDL NA NA <1 <1 <1 <1 <1 <1 2/8/2012 BDL BDL BDL BDL 0 40 BDL BDL BDL BDL BDL BDL BDL 10/13/2016 BDL BDL BDL BDL 0 4.3 BDL BDL BDL BDL BDL BDL BDL 5/17/2017 BDL BDL BDL BDL 0 2.7 BDL BDL BDL BDL BDL BDL BDL 10/26/2017 BDL BDL BDL BDL 0 4 BDL BDL BDL BDL BDL BDL BDL 5/31/2018 BDL BDL BDL BDL 0 3.2 BDL BDL BDL BDL BDL BDL BDL 12/5/2019 BDL BDL BDL BDL BDL 1.2 BDL BDL BDL BDL BDL BDL BDL 5/29/2020 BDL BDL BDL BDL 1.4 BDL BDL BDL BDL BDL BDL BDL 9/24/2003 4,590 102,000 2,820 13,350 122,760 BDL BDL BDL BDL BDL BDL BDL BDL 2/25/2004 4,590 102,000 2,820 13,350 122,760 NA NA 326 <100 <100 <100 1,040 302 2/8/2012 2,700 300,000 34,000 210,000 546,700 BDL BDL 87,000 BDL BDL BDL 370,000 95,000 10/13/2016 BDL 1,600,000 365,000 1,904,000 3,869,000 BDL BDL BDL BDL BDL BDL 673,000 BDL 5/17/2017 9/24/2003 1,160 9,320 1,160 5,830 17,470 BDL BDL NA BDL BDL BDL NA NA 2/25/2004 1,160 9,320 1,160 5,830 17,470 NA NA 161 <10 <10 <10 723 137 2/8/2012 800 5,100 1,000 5,700 12,600 BDL BDL 130 BDL BDL BDL 810 130 10/13/2016 19 153 130 483 845 BDL BDL 16.4 BDL BDL BDL 92 81 5/17/2017 312 2,000 621 2,557 5,490 BDL BDL 70.7 BDL BDL BDL 370 163 10/26/2017 29 16 57 130 232 BDL BDL 18 BDL 0.53 BDL 50 97 5/31/2018 170 350 340 970 1,830 BDL BDL 39 BDL BDL BDL 190 130 10/13/2016 133 192 102 313 740 12 BDL 69.3 BDL 14.4 1,360 83.1 38.9 5/17/2017 140 628 182 955 1,905 11.6 BDL 174 BDL 11.9 1,070 233 BDL 10/26/2017 240 2,300 590 4,000 7,130 19 BDL 360 BDL 13 1,500 720 250 5/31/2018 49 54 65 280 448 7.4 1.2 66 BDL 5.4 800 87 30 6/15/2019 2.7 11.8 14.1 91.3 119.9 12.3 BDL 11.6 BDL 2.1 175 31.1 13.6 12/5/2019 7.6 173 80.5 466 727.1 9.8 BDL 51.9 BDL 1.5 160 141 51.8 5/29/2020 BDL 24 18.1 106.9 149 13.1 BDL 11.1 BDL 0.57 44.3 39.2 BDL 12/10/2020 1.6 98.5 64.4 398 563 9.3 BDL 34.6 BDL BDL 34.7 130 42.3 10/13/2016 5,980 26,600 2,540 15,330 50,450 BDL BDL 752 BDL BDL BDL 2,210 573 5/17/2017 1,390 9,960 2,110 13,330 26,790 BDL BDL 837 BDL BDL 68.3 2,500 BDL 10/26/2017 3,100 19,000 2,600 17,000 41,700 BDL BDL 720 BDL BDL 260 3,300 960 5/31/2018 4,500 28,000 3,300 21,000 56,800 BDL BDL 880 BDL BDL 260 3,000 820 6/15/2019 2,960 14,500 1,920 12,510 31,890 BDL BDL 574 BDL BDL 541 2,160 616 12/4/2019 3,100 14,800 1,850 12,540 32,290 BDL BDL 698 BDL BDL 829 2,300 629 5/27/2020 3,320 13,500 1,800 11,890 30,510 BDL BDL 602 BDL BDL 999 2,130 BDL 12/11/2020 4,040 14,300 1,980 13,120 33,440 BDL BDL 719 BDL 68.6 1,570 2,240 619 MW-11 MW-9 MW-10 NOT SAMPLED DUE TO PRESENCE OF PRODUCT MW-13 MW-14 MW-12 Appendix C1 - Groundwater Analytical Data Groundwater Monitoring and Sampling Report - 1H2023 Former Gant Oil Company #823 4325 Old Rural Hall Road, Winston-Salem, North Carolina Well ID Date Sampled Benzene (ug/l) Toluene (ug/l) Ethylbenzene (ug/l) Xylenes (ug/l) TOTAL BTEX (ug/l) PCE (ug/l) TCE (ug/l) Naphthalene (ug/l) EDB (ug/l) 1,2 Dichloroethane (ug/l) MTBE (ug/l) 1,2,4- Trimethylbenze (ug/l) 1,3,5- Trimethylbenze (ug/l) NC GCL Standard 5,000 260,000 84,500 85,500 N/A 700 3,000 6,000 50 400 20,000 28,500 25,000 10/13/2016 10,400 41,200 6,160 33,200 90,960 BDL BDL 4,190 BDL BDL BDL 23,900 3,230 5/17/2017 1,460 5,440 2,220 11,540 20,660 BDL BDL 1,130 34.1 38.4 BDL 7,580 2,280 10/26/2017 6,500 9,900 1,800 9,400 27,600 BDL BDL 750 44 43 70 3,500 950 5/31/2018 8,900 25,000 2,700 14,000 50,600 BDL BDL 500 150 160 520 2,600 700 6/15/2019 135 297 58.8 350 840.8 BDL BDL 20.8 1.9 6.3 19.4 104 29.3 12/4/2019 4470 11500 1150 6210 23,330 BDL BDL 281 60 95.5 288 912 BDL 5/27/2020 1,750 3,720 485 3,420 9,375 BDL BDL 203 19.4 44.2 160 794 BDL 12/10/2020 6,170 14,000 1,520 8,310 30,000 BDL BDL 325 BDL 176 621 1,250 338 7/16/2021 6,770 14,500 1,620 8,400 31,290 NA NA 357 77.2 178 807 1,250 BDL 12/20/2021 6,460 17,900 1,720 9,150 35,230 BDL BDL BDL BDL BDL BDL 1,210 341 6/7/2022 8,330 18,900 2,000 10,430 39,660 BDL BDL 469 94.1 158 896 1,510 355 12/29/2022 4,760 9,570 1,380 7,360 23,070 BDL BDL 354 BDL 142 837 BDL BDL 6/8/2023 5,390 9,330 1,210 6,410 22,340 BDL BDL 296 BDL 128 682 1,030 223 10/13/2016 BDL BDL BDL BDL 0 408 4.1 BDL BDL 8.9 BDL BDL BDL 5/17/2017 BDL BDL BDL BDL 0 303 2.6 BDL BDL BDL BDL BDL BDL 10/26/2017 BDL BDL BDL BDL 0 560 4.9 BDL BDL BDL BDL BDL BDL 5/31/2018 BDL BDL BDL BDL 0 230 2.3 BDL BDL BDL BDL BDL BDL 12/6/2019 BDL BDL BDL BDL BDL 10.5 BDL BDL BDL BDL BDL BDL BDL 5/27/2020 BDL BDL BDL BDL BDL 14.3 BDL BDL BDL BDL BDL BDL BDL 10/13/2016 3,050 1,300 959 5,638 10,947 13.7 BDL 353 BDL 16.4 BDL 1,340 279 5/17/2017 1,690 420 456 2,779 5,345 35.5 10.4 180 BDL 9.6 1,760 714 BDL 10/26/2017 1,400 170 250 2,100 3,920 44 12 120 BDL 5.5 2,200 530 120 5/31/2018 2,100 460 300 3,400 6,260 18 13 130 BDL 7.5 2,100 710 160 10/13/2016 1,520 9,640 1,030 5,320 17,510 32.7 BDL 192 BDL BDL 1,620 1,140 230 5/17/2017 2,140 23,400 1,430 7,550 34,520 BDL BDL 309 BDL BDL 1,450 1,420 BDL 10/26/2017 1,700 6,000 620 3,700 12,020 33 BDL 130 BDL 30 2,700 710 140 5/31/2018 3,300 5,800 760 4,800 14,660 70 BDL 190 BDL 20 6,600 1,200 210 6/15/2019 2,110 4,080 663 3,576 10,429 BDL BDL 137 BDL 38.8 5,530 792 BDL 12/6/2019 2,620 19,700 1650 8,700 32,670 BDL BDL 386 BDL BDL 5,690 1660 390 5/29/2020 2,690 10,400 1,060 5,600 19,750 BDL BDL 277 BDL BDL 6,340 1,220 BDL 12/11/2020 2,770 20,300 1,850 9,510 34,430 BDL BDL 346 BDL BDL 5,740 1,600 375 10/13/2016 5.1 61.5 153 1,934 2,154 181 BDL 194 BDL BDL BDL 1,320 453 5/17/2017 6 19 27 848 900 102 BDL 109 BDL BDL BDL 881 228 10/26/2017 30 2,700 1,600 9,900 14,230 100 BDL 430 BDL BDL BDL 3,100 830 5/31/2018 14 1,500 1,500 9,300 12,314 85 BDL 380 BDL BDL BDL 3,200 850 6/15/2019 24.7 1,060 1,010 6,360 8,455 71.6 BDL 367 BDL BDL BDL 2,170 729 12/6/2019 338 19,900 1,950 10,070 32,258 BDL BDL BDL BDL BDL BDL 1,830 563 5/29/2020 117 7,400 1,490 7,190 16,197 27.6 BDL 335 BDL BDL BDL 1,880 669 12/11/2020 397 30,900 2,910 15,830 50,037 BDL BDL 452 BDL BDL BDL 2,280 699 10/13/2016 BDL BDL BDL BDL 0 19.3 BDL BDL BDL BDL BDL BDL BDL 5/17/2017 BDL BDL BDL BDL 0 16.9 BDL BDL BDL BDL BDL BDL BDL 10/26/2017 BDL BDL BDL BDL 0 21 BDL BDL BDL BDL BDL BDL BDL 5/31/2018 BDL BDL BDL BDL 0 15 BDL BDL BDL BDL BDL BDL BDL 6/15/2019 BDL 2.6 2.3 15.9 20.8 9.5 BDL 2.9 BDL BDL BDL 6.9 BDL 12/6/2019 BDL BDL BDL BDL BDL 16.9 BDL BDL BDL BDL BDL BDL BDL 5/29/2020 BDL BDL BDL BDL BDL 18 BDL BDL BDL BDL BDL BDL BDL MW-18 MW-15 MW-16 MW-17 MW-19 MW-20 Appendix C1 - Groundwater Analytical Data Groundwater Monitoring and Sampling Report - 1H2023 Former Gant Oil Company #823 4325 Old Rural Hall Road, Winston-Salem, North Carolina Well ID Date Sampled Benzene (ug/l) Toluene (ug/l) Ethylbenzene (ug/l) Xylenes (ug/l) TOTAL BTEX (ug/l) PCE (ug/l) TCE (ug/l) Naphthalene (ug/l) EDB (ug/l) 1,2 Dichloroethane (ug/l) MTBE (ug/l) 1,2,4- Trimethylbenze (ug/l) 1,3,5- Trimethylbenze (ug/l) NC GCL Standard 5,000 260,000 84,500 85,500 N/A 700 3,000 6,000 50 400 20,000 28,500 25,000 9/24/2003 599 294 25.5 287 1,206 BDL BDL 15.1 BDL 60.5 34.2 26.9 2.6 2/8/2012 6,800 6,800 1,200 5,700 20,500 BDL BDL 310 BDL 260 70 870 220 10/13/2016 5,410 5,960 893 5,290 17,553 BDL BDL 370 BDL 561 1,720 869 224 5/17/2017 7,670 12,000 1,120 5,990 26,780 BDL BDL 365 56 509 2,830 730 BDL 10/25/2017 13,000 18,000 1,700 9,800 42,500 BDL BDL 400 BDL 1,000 6,400 1,100 270 6/1/2018 8,800 16,000 940 9,100 34,840 BDL BDL 360 80 1,100 7,300 990 300 6/15/2019 7,900 10,900 1,270 6,750 26,820 BDL BDL 265 BDL 588 2,760 896 236 12/4/2019 7,680 10,600 1,390 7,480 27,150 BDL BDL 312 BDL 605 2,830 1010 253 5/29/2020 6,050 8,210 1,060 5,530 20,850 BDL BDL 270 33.6 401 1,680 851 BDL 12/11/2020 6,700 9,510 1,140 6,170 23,520 BDL BDL 283 BDL 514 2,620 749 202 7/16/2021 BDL BDL BDL BDL BDL NA NA BDL BDL BDL BDL BDL BDL 12/20/2021 2,430 3,720 296 2,168 8,614 BDL BDL BDL BDL 323 1,590 235 BDL 9/24/2003 87 BDL BDL 77 164 BDL BDL BDL BDL 106 19.1 BDL BDL 2/28/2004 87.2 <1.0 <1.0 77 164.2 NA NA NA 0.23 106 19.1 NA NA 2/8/2012 37 BDL BDL 1,000 1,037 BDL BDL BDL BDL 38 BDL BDL BDL 10/13/2016 BDL BDL BDL BDL 0 BDL BDL BDL BDL BDL 10.8 BDL BDL 5/17/2017 462 83 41 381 966 36.8 5.5 39.2 BDL 14.9 537 83 BDL 10/25/2017 710 4 38 300 1,052 6 2.3 50 BDL 24 840 110 47 6/1/2018 BDL BDL BDL BDL 0 1 BDL BDL BDL BDL 10.8 BDL BDL 6/15/2019 BDL 0.61 BDL 1.1 1.71 BDL BDL BDL BDL BDL 0.74 0.77 BDL 9/24/2003 94 184 21 125 424 BDL BDL BDL BDL 110 27.9 BDL BDL 2/27/2004 93.5 184 20.8 125.3 423.6 NA NA NA 0.18 110 27.9 NA NA 2/8/2012 400 BDL 6.9 BDL 407 3.8 BDL 18 BDL 21 BDL 50 BDL 10/13/2016 110 0.84 2.5 BDL 113 1.3 BDL 11.4 BDL 9.2 BDL 25.2 5 5/17/2017 104 BDL 3 128 235 2.6 BDL 7.2 BDL 9.2 BDL 18 5 10/25/2017 770 1 17 130 918 BDL BDL 41 BDL 41 0.65 93 16 6/1/2018 960 2,300 130 3,900 7,290 BDL BDL 230 BDL 49 13 620 190 6/15/2019 637 218 68.8 606 1529.8 BDL BDL 50.2 BDL 32.5 BDL 152 38.2 12/4/2019 7 0.83 BDL BDL 7.83 BDL BDL BDL BDL BDL BDL 2.5 0.69 5/29/2020 BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL 10/13/2016 BDL BDL BDL BDL 0 46.6 7.8 BDL BDL BDL BDL BDL BDL 5/17/2017 BDL BDL BDL BDL 0 33.6 5.5 BDL BDL BDL BDL BDL BDL 10/25/2017 BDL BDL BDL BDL 0 66 9.6 BDL BDL BDL BDL BDL BDL 6/1/2018 BDL BDL BDL BDL 0 4.1 0.5 BDL BDL BDL BDL BDL BDL 6/15/2019 0.57 1.1 BDL BDL 1.67 9.9 2.7 BDL BDL BDL BDL BDL BDL 12/5/2019 16.6 BDL BDL BDL 16.6 1.8 BDL BDL BDL BDL BDL BDL BDL 5/27/2020 BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL Notes: EDB = 1,2-Dibromoethane MTBE = Methyl-tert-butyl-ether PCE = Tetrachloroethylene TCE = Trichloroethylene N/A = Not Applicable Bold and Highlighted values exceed the GCL Standards NSE = No Standard Established All results reported in micrograms per liter (ug/l) GCL Standard = NC Gross Contamination Levels for groundwater. BDL = Below Detection Limits NA = Not Analyzed DW-1 VEW-4 DW-2 DW-3 Appendix C2 - Groundwater Analytical Data Groundwater Monitoring and Sampling Report - 1H2023 Former Gant Oil Company #823 4325 Old Rural Hall Road, Winston-Salem, North Carolina Well ID Date Sampled 1,2- Dichloropropane Acetone Bromodichlorom ethane Chloroform cis-1,2- Dichloroethene Diisopropyl Ether (DIPE)Isopropylbenzene Lead (3030C)Methyl Butyl Ketone Methyl Ethyl Ketone Methyl Isobutyl Ketone NC GCL Standard 600 600,000 NSE 70,000 70,000 70,000 25,000 15,000 NSE 4,000,000 100,000 5/4/2003 NA 2,940 NA <5 NA NA 68.9 <5 NA NA NA 9/24/2003 NA 2,820 NA <10 NA NA 100 6.9 NA NA NA 2/8/2012 NA NA NA BDL NA 100 96 BDL 38 120 56 5/4/2003 NA <200 NA <20 NA NA 162 <5 NA NA NA 9/24/2003 NA <200 NA <20 NA NA 131 7.45 NA NA NA 2/8/2012 NA NA NA BDL NA BDL BDL BDL BDL BDL BDL 5/4/2003 NA <100 NA <10 NA NA 189 <5 NA NA NA 9/24/2003 NA <200 NA <20 NA NA 158 NA NA NA NA 2/8/2012 NA NA NA BDL NA BDL 140 BDL 77 BDL BDL 10/13/2016 NA NA NA BDL NA BDL 129 75.3 NA NA NA 5/17/2017 NA NA NA NA NA BDL 84.1 NA NA NA NA 10/26/2017 NA BDL NA NA NA NA 200 NA 110 NA 38 5/31/2018 NA BDL NA BDL NA BDL 140 NA 70 NA BDL 6/15/2019 NA NA NA NA NA NA NA NA NA NA NA 12/4/2019 BDL NA BDL BDL BDL BDL 128 NA NA NA NA 5/27/2020 BDL NA BDL BDL BDL BDL 103 NA NA NA NA 12/10/2020 BDL NA BDL BDL BDL BDL 97.6 NA NA NA NA 9/24/2003 NA <10 NA 1.2 NA NA <1 NA NA NA NA 2/8/2012 NA NA NA 0.96 NA BDL BDL BDL BDL BDL BDL 9/24/2003 NA 14.2 NA <1 NA NA <1 NA NA NA NA 2/8/2012 NA NA NA 0.26 NA BDL BDL BDL BDL BDL BDL 10/13/2016 NA NA NA BDL NA BDL BDL 16.6 NA NA NA 5/17/2017 NA NA NA NA NA BDL BDL NA NA NA NA 10/26/2017 NA BDL NA NA NA NA BDL NA BDL NA BDL 5/31/2018 NA BDL NA BDL NA BDL BDL NA BDL NA BDL 6/15/2019 BDL NA BDL BDL BDL BDL BDL NA NA NA NA 9/24/2003 NA <10 NA <1 NA NA 23.4 NA NA NA NA 2/8/2012 NA NA NA BDL NA BDL 25 BDL BDL BDL BDL 10/13/2016 NA NA NA BDL NA 3.9 BDL 62.6 NA NA NA 5/17/2017 NA NA NA NA NA 24.8 11.4 NA NA NA NA 10/26/2017 NA BDL NA NA NA NA 23 NA BDL NA 2 5/31/2018 NA 23 NA BDL NA BDL 1.7 NA 1.5 NA 2.9 9/24/2003 NA 150 NA <1 NA NA 42 NA NA NA NA 2/8/2012 NA NA NA BDL NA BDL 27 BDL BDL BDL BDL 10/13/2016 NA NA NA BDL NA BDL 23.5 21.2 NA NA NA 5/17/2017 NA NA NA NA NA BDL 31.4 NA NA NA NA 10/26/2017 NA 22 NA NA NA NA 76 NA BDL NA BDL 5/31/2018 NA 23 NA BDL NA BDL 17 NA BDL NA 1.6 6/15/2019 BDL NA BDL BDL BDL BDL 6.6 NA NA NA NA 12/6/2019 BDL NA BDL BDL BDL BDL 7.7 NA NA NA NA 5/27/2020 BDL NA BDL BDL BDL BDL 9.5 NA NA NA NA 12/10/2020 BDL NA BDL BDL BDL BDL 9.7 NA NA NA NA 9/24/2003 NA <10 NA <1 NA NA <1 NA NA NA NA 2/8/2012 NA NA NA NA NA NA NA BDL NA NA NA 10/13/2016 NA NA NA BDL NA BDL BDL BDL NA NA NA 5/17/2017 NA NA NA NA NA BDL BDL NA NA NA NA 10/26/2017 NA BDL NA NA NA NA BDL NA BDL NA BDL 5/31/2018 NA BDL NA BDL NA BDL BDL NA BDL NA BDL 12/4/2019 BDL NA BDL BDL BDL BDL BDL NA NA NA NA MW-1 MW-2 MW-3 MW-4 MW-7 MW-5 MW-6 MW-8 Appendix C2 - Groundwater Analytical Data Groundwater Monitoring and Sampling Report - 1H2023 Former Gant Oil Company #823 4325 Old Rural Hall Road, Winston-Salem, North Carolina Well ID Date Sampled 1,2- Dichloropropane Acetone Bromodichlorom ethane Chloroform cis-1,2- Dichloroethene Diisopropyl Ether (DIPE)Isopropylbenzene Lead (3030C)Methyl Butyl Ketone Methyl Ethyl Ketone Methyl Isobutyl Ketone NC GCL Standard 600 600,000 NSE 70,000 70,000 70,000 25,000 15,000 NSE 4,000,000 100,000 9/24/2003 NA 76.2 NA <1 NA NA <1 NA NA NA NA 2/8/2012 NA NA NA BDL NA BDL BDL BDL BDL BDL BDL 10/13/2016 NA NA NA BDL 0.93 BDL BDL 175 NA NA NA 5/17/2017 NA NA NA NA NA BDL BDL NA NA NA NA 10/26/2017 NA BDL NA NA NA NA BDL NA BDL NA BDL 5/31/2018 NA BDL NA BDL BDL BDL BDL NA BDL NA BDL 12/4/2019 BDL NA BDL BDL BDL BDL BDL NA NA NA NA 5/29/2020 BDL NA BDL BDL BDL BDL BDL NA NA NA NA 9/24/2003 NA <10 NA <1 NA NA <1 <5 NA NA NA 2/8/2012 NA NA NA BDL NA BDL BDL BDL BDL BDL BDL 10/13/2016 NA NA NA BDL BDL BDL BDL 5.1 NA NA NA 5/17/2017 NA NA NA NA NA BDL BDL NA NA NA NA 10/26/2017 NA 5 NA NA NA NA BDL NA BDL NA BDL 5/31/2018 NA 5 NA BDL BDL BDL BDL NA BDL NA BDL 12/5/2019 BDL NA BDL BDL BDL BDL BDL NA NA NA NA 5/29/2020 BDL NA BDL BDL BDL BDL BDL NA NA NA NA 9/24/2003 NA NA NA NA NA NA NA NA NA NA NA 2/25/2004 NA <1000 NA NA NA NA <100 <5 NA NA NA 2/8/2012 NA NA NA NA NA BDL 4,300 BDL BDL NA BDL 10/13/2016 NA NA NA BDL BDL BDL BDL BDL NA NA NA 9/24/2003 NA NA NA NA NA NA NA NA NA NA NA 2/25/2004 NA 300 NA NA NA NA <10 <5 NA NA NA 2/8/2012 NA NA NA NA NA BDL BDL BDL 180 BDL 130 10/13/2016 NA NA NA BDL BDL BDL 9.7 182 NA NA NA 5/17/2017 NA NA NA NA NA BDL 23.7 NA NA NA NA 10/26/2017 NA BDL NA NA NA NA 13 NA 1.3 NA 7.8 5/31/2018 NA BDL NA BDL BDL BDL 19 NA BDL NA 11 10/13/2016 NA NA NA BDL BDL 77.7 18.3 9.5 NA NA NA 5/17/2017 NA NA NA NA NA 59 26.7 NA NA NA NA 10/26/2017 NA 84 NA NA NA NA 53 NA 38 NA 27 5/31/2018 NA 15 NA BDL 1.8 38 38 NA 3.2 NA 4.1 6/15/2019 BDL NA BDL BDL BDL 7 4 NA NA NA NA 12/5/2019 BDL NA BDL BDL BDL BDL 11 NA NA NA NA 5/29/2020 BDL NA BDL BDL BDL 2 3.0 NA NA NA NA 12/10/2020 BDL NA BDL BDL BDL BDL 9.1 NA NA NA NA 10/13/2016 NA NA NA NA NA BDL BDL 30.9 NA NA NA 5/17/2017 NA NA NA NA NA BDL 108 NA NA NA NA 10/26/2017 NA NA NA NA NA NA 160 NA BDL NA BDL 5/31/2018 NA BDL BDL BDL BDL BDL 160 NA 75 BDL BDL 6/15/2019 BDL NA BDL BDL BDL BDL 104 NA NA NA NA 12/4/2019 BDL NA BDL BDL BDL 58.6 102 NA NA NA NA 5/27/2020 BDL NA BDL BDL BDL 90.4 101 NA NA NA NA 12/11/2020 BDL NA BDL BDL BDL 156 107 NA NA NA NA MW-9 MW-10 MW-11 MW-12 MW-13 MW-14 Appendix C2 - Groundwater Analytical Data Groundwater Monitoring and Sampling Report - 1H2023 Former Gant Oil Company #823 4325 Old Rural Hall Road, Winston-Salem, North Carolina Well ID Date Sampled 1,2- Dichloropropane Acetone Bromodichlorom ethane Chloroform cis-1,2- Dichloroethene Diisopropyl Ether (DIPE)Isopropylbenzene Lead (3030C)Methyl Butyl Ketone Methyl Ethyl Ketone Methyl Isobutyl Ketone NC GCL Standard 600 600,000 NSE 70,000 70,000 70,000 25,000 15,000 NSE 4,000,000 100,000 10/13/2016 NA NA NA NA NA BDL BDL 10.1 NA NA NA 5/17/2017 NA NA NA NA NA 49.8 375 NA NA NA NA 10/26/2017 NA NA NA NA NA NA 240 NA 51 NA 29 5/31/2018 NA 1,500 BDL BDL BDL 210 140 NA 280 670 140 6/15/2019 BDL NA BDL BDL BDL 8.2 4.3 NA NA NA NA 12/4/2019 BDL NA BDL BDL BDL 130.0 BDL NA NA NA NA 5/27/2020 BDL NA BDL BDL BDL 73 33.6 NA NA NA NA 12/10/2020 BDL NA BDL BDL BDL 258 82.7 NA NA NA NA 7/16/2021 BDL NA BDL BDL BDL 267 79.2 NA NA NA NA 12/20/2021 BDL NA BDL BDL BDL BDL BDL NA NA NA NA 6/7/2022 BDL NA BDL BDL BDL 244 93.2 NA NA NA NA 12/29/2022 BDL 1,360 BDL BDL BDL 208 BDL NA NA NA NA 6/8/2023 BDL NA BDL BDL BDL 184 61.2 NA NA NA NA 10/13/2016 BDL NA NA NA NA BDL BDL 110 NA NA NA 5/17/2017 NA NA NA NA NA BDL BDL NA NA NA NA 10/26/2017 NA NA NA NA NA NA BDL NA BDL NA BDL 5/31/2018 NA BDL 3.1 24 4 BDL BDL NA BDL BDL BDL 12/6/2019 BDL NA 3.7 28 BDL BDL BDL NA NA NA NA 5/27/2020 BDL NA 2.3 17.4 BDL BDL BDL NA NA NA NA 10/13/2016 NA NA NA NA NA 117 54 BDL NA NA NA 5/17/2017 NA NA NA NA NA 76.9 29 NA NA NA NA 10/26/2017 NA NA NA NA NA NA 19 NA BDL NA BDL 5/31/2018 NA BDL BDL BDL BDL 76 26 NA 11 BDL 15 10/13/2016 NA NA NA NA NA 112 56.6 234 NA NA NA 5/17/2017 NA NA NA NA NA 101 71.8 NA NA NA NA 10/26/2017 NA NA NA NA NA NA 39 NA 23 NA BDL 5/31/2018 NA 56 BDL BDL BDL 250 53 NA 24 BDL 26 6/15/2019 BDL NA BDL BDL BDL 216 41.1 NA NA NA NA 12/6/2019 BDL NA BDL BDL BDL 181 70.3 NA NA NA NA 5/29/2020 BDL NA BDL BDL BDL 226 58.1 NA NA NA NA 12/11/2020 BDL NA BDL BDL BDL 195 83.5 NA NA NA NA 10/13/2016 NA NA NA NA NA BDL 60 BDL NA NA NA 5/17/2017 NA NA NA NA NA BDL 41.4 NA NA NA NA 10/26/2017 NA 71 NA NA NA NA 110 NA 22 NA 18 5/31/2018 NA 57 NA NA BDL BDL 110 NA 25 BDL 30 6/15/2019 BDL NA BDL BDL BDL BDL 86.8 NA NA NA NA 12/6/2019 BDL NA BDL BDL BDL BDL BDL NA NA NA NA 5/29/2020 BDL NA BDL BDL BDL BDL 75.5 NA NA NA NA 12/11/2020 BDL NA BDL BDL BDL BDL BDL NA NA NA NA 10/13/2016 NA NA NA NA NA BDL BDL BDL NA NA NA 5/17/2017 NA NA NA NA NA BDL BDL NA NA NA NA 10/26/2017 NA BDL NA NA NA NA BDL NA BDL NA BDL 5/31/2018 NA BDL NA NA BDL BDL BDL NA BDL BDL BDL 6/15/2019 BDL NA BDL BDL BDL BDL BDL NA NA NA NA 12/6/2019 BDL NA BDL BDL BDL BDL BDL NA NA NA NA 5/29/2020 BDL NA BDL BDL BDL BDL BDL NA NA NA NA MW-19 MW-20 MW-15 MW-18 MW-16 MW-17 Appendix C2 - Groundwater Analytical Data Groundwater Monitoring and Sampling Report - 1H2023 Former Gant Oil Company #823 4325 Old Rural Hall Road, Winston-Salem, North Carolina Well ID Date Sampled 1,2- Dichloropropane Acetone Bromodichlorom ethane Chloroform cis-1,2- Dichloroethene Diisopropyl Ether (DIPE)Isopropylbenzene Lead (3030C)Methyl Butyl Ketone Methyl Ethyl Ketone Methyl Isobutyl Ketone NC GCL Standard 600 600,000 NSE 70,000 70,000 70,000 25,000 15,000 NSE 4,000,000 100,000 9/24/2003 NA 54.8 NA 1.7 NA NA 3 NA NA NA NA 2/8/2012 NA NA NA NA NA 220 61 BDL BDL NA 48 10/13/2016 NA NA NA NA NA 798 44 10.9 NA NA NA 5/17/2017 NA NA NA NA NA 665 52.2 NA NA NA NA 10/25/2017 NA 770 NA NA NA NA 71 NA 140 NA 160 6/1/2018 NA 950 NA NA BDL 1,400 37 NA 170 660 160 6/15/2019 BDL NA BDL BDL BDL 839 59.3 NA NA NA NA 12/4/2019 BDL NA BDL BDL BDL 770 68.3 NA NA NA NA 5/29/2020 BDL NA BDL BDL BDL 636 59.7 NA NA NA NA 12/11/2020 BDL NA BDL BDL BDL 761 58.3 NA NA NA NA 7/16/2021 BDL NA BDL BDL BDL 761 BDL NA NA NA NA 12/20/2021 BDL NA BDL BDL BDL 474 BDL NA NA NA NA 9/24/2003 NA NA NA NA NA NA NA NA NA NA NA 2/28/2004 NA NA NA NA NA NA 9.9 <5 NA NA NA 2/8/2012 NA NA NA NA NA 94 BDL BDL BDL NA BDL 10/13/2016 NA NA NA NA NA 0.95 BDL 10.2 NA NA NA 5/17/2017 NA NA NA NA NA 40.5 6.6 NA NA NA NA 10/25/2017 NA BDL NA NA NA NA 9.4 NA BDL NA BDL 6/1/2018 NA BDL NA NA BDL BDL BDL NA BDL BDL BDL 6/15/2019 BDL NA BDL BDL BDL BDL BDL NA NA NA NA 9/24/2003 NA NA NA NA NA NA NA NA NA NA NA 2/27/2004 NA NA NA NA NA NA 3.2 <5 NA NA NA 2/8/2012 NA NA NA NA NA 5.2 4.5 BDL BDL NA BDL 10/13/2016 NA NA NA NA NA 2.5 BDL BDL NA NA NA 5/17/2017 NA NA NA NA NA 1.7 1.6 NA NA NA NA 10/25/2017 NA BDL NA NA NA NA 7.7 NA BDL NA BDL 6/1/2018 NA BDL NA NA BDL 18 10 NA BDL BDL BDL 6/15/2019 BDL NA BDL BDL BDL 7.8 11.2 NA NA NA NA 12/4/2019 BDL NA BDL BDL BDL BDL BDL NA NA NA NA 5/29/2020 BDL NA BDL BDL BDL BDL BDL NA NA NA NA 10/13/2016 0.58 NA NA NA NA BDL BDL BDL NA NA NA 5/17/2017 0.52 NA NA NA 5 BDL BDL NA NA NA NA 10/25/2017 NA NA NA NA NA NA BDL NA NA NA NA 6/1/2018 BDL 5.5 NA NA BDL BDL BDL NA NA NA NA 6/15/2019 BDL NA BDL BDL 1.6 BDL BDL NA NA NA NA 12/5/2019 BDL NA BDL BDL BDL BDL BDL NA NA NA NA 5/27/2020 BDL NA BDL BDL BDL BDL BDL NA NA NA NA Notes: All results reported in micrograms per liter (ug/l) GCL Standard = NC Gross Contamination Levels for groundwater. BDL = Below Detection Limits Bold values exceed the GCL Standards NSE = No Standard Established NA = Not Analyzed DW-1 DW-3 VEW-4 DW-2 Appendix C3 - Groundwater Analytical Data Groundwater Monitoring and Sampling Report - 1H2023 Former Gant Oil Company #823 4325 Old Rural Hall Road, Winston-Salem, North Carolina Well ID Date Sampled Methylene Chloride n-butylbenzene n-propylbenzene p- Isopropyltoluene 2-Hexanone sec- butylbenzene Styrene tert- butylbenzene Isopropyl Ether Carbon disulfide NC GCL Standard 5,000 6,900 30,000 NSE 28,000 8,500 70,000 15,000 70,000 410 5/4/2003 NA 22.9 146 NA 243 6.4 NA NA 1,110 <5 9/24/2003 NA 42.7 231 NA 276 10.4 NA NA NA <10 2/8/2012 NA 44 210 29 NA 20 BDL NA NA NA 5/4/2003 NA 58.1 352 NA <100 <20 NA NA 222 <20 9/24/2003 NA 42.4 276 NA <100 <20 NA NA NA <20 2/8/2012 NA BDL 460 BDL NA BDL BDL NA NA NA 5/4/2003 NA 82.7 472 NA <50 27.1 NA NA 22.9 <10 9/24/2003 NA 89.9 411 NA 423 <20 NA NA NA <20 2/8/2012 NA 59 380 BDL NA BDL BDL NA NA NA 10/13/2016 NA BDL 374 BDL NA BDL BDL NA NA NA 5/17/2017 NA BDL NA NA NA NA NA NA NA NA 10/26/2017 NA NA NA NA NA 34 16 BDL NA NA 5/31/2018 NA 63 370 13 NA 23 13 BDL NA NA 12/4/2019 BDL BDL BDL NA NA BDL BDL BDL BDL NA 5/27/2020 BDL BDL BDL NA NA BDL BDL BDL NA NA 12/10/2020 BDL BDL BDL NA NA BDL BDL BDL NA NA 9/24/2003 NA <1 <1 NA <5 <1 NA NA NA <1 2/8/2012 NA BDL BDL BDL NA BDL BDL NA NA NA 9/24/2003 NA <1 <1 NA <5 <1 NA NA NA <1 2/8/2012 NA BDL BDL BDL NA BDL BDL NA NA NA 10/13/2016 NA BDL BDL BDL NA BDL BDL NA NA NA 5/17/2017 NA BDL NA NA NA NA NA NA NA NA 10/26/2017 NA NA NA NA NA BDL BDL BDL NA NA 5/31/2018 NA BDL BDL BDL NA BDL BDL BDL NA NA 6/15/2019 BDL BDL BDL NA NA BDL BDL BDL BDL NA 9/24/2003 NA 10.5 32.1 NA NA 5.6 NA NA NA <1 2/8/2012 NA 8.3 43 NA NA 9.3 BDL NA NA NA 10/13/2016 NA BDL 25.9 NA NA 8.9 BDL NA NA NA 5/17/2017 NA BDL NA NA NA NA NA NA NA NA 10/26/2017 NA NA NA NA NA 5.5 BDL BDL NA NA 5/31/2018 NA BDL 1.7 NA NA 0.56 BDL BDL NA NA 9/24/2003 NA 36.4 67.4 NA NA 26 NA NA NA <1 2/8/2012 NA 36 50 NA NA 46 BDL NA NA NA 10/13/2016 NA BDL 48.3 NA NA 30.6 BDL NA NA NA 5/17/2017 NA BDL NA NA NA NA NA NA NA NA 10/26/2017 NA NA NA NA NA 160 BDL 12 NA NA 5/31/2018 NA 24 27 NA NA 15 BDL 1.6 NA NA 6/15/2019 BDL BDL BDL NA NA BDL BDL BDL BDL NA 12/6/2019 BDL BDL BDL NA NA BDL BDL BDL BDL NA 5/27/2020 BDL BDL BDL NA NA BDL BDL BDL NA NA 12/10/2020 BDL BDL BDL NA NA BDL BDL BDL NA NA 9/24/2003 NA <1 <1 NA NA <1 NA NA NA <1 2/8/2012 NA NA NA NA NA NA NA NA NA NA 10/13/2016 NA BDL BDL NA NA BDL BDL NA NA NA 5/17/2017 NA BDL NA NA NA NA NA NA NA NA 10/26/2017 NA NA NA NA NA BDL BDL BDL NA NA 5/31/2018 NA BDL BDL NA NA BDL BDL BDL NA NA 12/4/2019 BDL BDL BDL NA NA BDL BDL BDL BDL NA MW-1 MW-2 MW-4 MW-6 MW-5 MW-3 MW-7 MW-8 Appendix C3 - Groundwater Analytical Data Groundwater Monitoring and Sampling Report - 1H2023 Former Gant Oil Company #823 4325 Old Rural Hall Road, Winston-Salem, North Carolina Well ID Date Sampled Methylene Chloride n-butylbenzene n-propylbenzene p- Isopropyltoluene 2-Hexanone sec- butylbenzene Styrene tert- butylbenzene Isopropyl Ether Carbon disulfide NC GCL Standard 5,000 6,900 30,000 NSE 28,000 8,500 70,000 15,000 70,000 410 9/24/2003 NA <1 <1 NA NA <1 NA NA NA <1 2/8/2012 NA BDL BDL NA NA BDL BDL NA NA NA 10/13/2016 NA BDL BDL NA NA BDL NA NA NA NA 5/17/2017 NA BDL NA NA NA NA NA NA NA NA 10/26/2017 NA NA NA NA NA BDL NA NA NA NA 5/31/2018 NA BDL BDL NA NA BDL NA NA NA NA 12/4/2019 BDL BDL BDL NA NA BDL BDL BDL BDL NA 5/29/2020 BDL BDL BDL NA NA BDL BDL BDL NA NA 9/24/2003 NA <1 <1 NA NA <1 NA NA NA <1 2/8/2012 NA BDL BDL NA NA BDL BDL NA NA NA 10/13/2016 NA BDL BDL NA NA BDL NA NA NA NA 5/17/2017 NA BDL NA NA NA NA NA NA NA NA 10/26/2017 NA NA NA NA NA BDL NA NA NA NA 5/31/2018 NA BDL BDL NA NA BDL NA NA NA NA 12/5/2019 BDL BDL BDL NA NA BDL BDL BDL BDL NA 5/29/2020 BDL BDL BDL NA NA BDL BDL BDL NA NA 9/24/2003 NA NA NA NA NA NA NA NA NA NA 2/25/2004 NA NA NA NA NA NA NA NA NA <100 2/8/2012 NA 10,000 27,000 NA NA 5,200 BDL NA NA NA 10/13/2016 NA BDL BDL NA NA BDL NA NA NA NA 9/24/2003 NA NA NA NA NA NA NA NA NA NA 2/25/2004 NA NA NA NA NA NA NA NA NA <10 2/8/2012 NA BDL 98 NA NA BDL BDL NA NA NA 10/13/2016 NA BDL 16.9 NA NA BDL NA NA NA NA 5/17/2017 NA BDL NA NA NA NA NA NA NA NA 10/26/2017 NA NA NA NA NA 2.5 NA NA NA NA 5/31/2018 NA BDL 36 NA NA 15 NA NA NA NA 10/13/2016 NA BDL 24.3 NA NA BDL NA NA NA NA 5/17/2017 NA BDL NA NA NA NA NA NA NA NA 10/26/2017 NA NA NA NA NA 6.9 NA NA NA NA 5/31/2018 NA 9 18 NA NA 3.5 NA NA NA NA 6/15/2019 BDL BDL 5.2 NA NA BDL BDL BDL 6.8 NA 12/5/2019 BDL 5 23.7 NA NA BDL BDL BDL BDL NA 5/29/2020 BDL BDL BDL NA NA BDL BDL BDL NA NA 12/10/2020 BDL BDL BDL NA NA BDL BDL BDL NA NA 10/13/2016 519 BDL 305 NA NA BDL BDL NA NA NA 5/17/2017 NA BDL NA NA NA NA NA NA NA NA 10/26/2017 NA NA NA NA NA BDL BDL NA NA NA 5/31/2018 BDL BDL 390 NA NA 140 BDL NA NA NA 6/15/2019 BDL BDL 252 NA NA BDL BDL BDL BDL NA 12/4/2019 BDL BDL 259 NA NA BDL BDL BDL 58.6 NA 5/27/2020 BDL BDL BDL NA NA BDL BDL BDL NA NA 12/11/2020 BDL BDL BDL NA NA BDL BDL BDL NA NA MW-14 MW-13 MW-9 MW-10 MW-11 MW-12 Appendix C3 - Groundwater Analytical Data Groundwater Monitoring and Sampling Report - 1H2023 Former Gant Oil Company #823 4325 Old Rural Hall Road, Winston-Salem, North Carolina Well ID Date Sampled Methylene Chloride n-butylbenzene n-propylbenzene p- Isopropyltoluene 2-Hexanone sec- butylbenzene Styrene tert- butylbenzene Isopropyl Ether Carbon disulfide NC GCL Standard 5,000 6,900 30,000 NSE 28,000 8,500 70,000 15,000 70,000 410 10/13/2016 BDL BDL 1,660 NA NA BDL BDL NA NA NA 5/17/2017 NA BDL NA NA NA NA NA NA NA NA 10/26/2017 NA NA NA NA NA 82 25 NA NA NA 5/31/2018 BDL 51 390 NA NA 150 BDL NA NA NA 6/15/2019 BDL BDL 10.2 NA NA BDL BDL BDL 8.2 NA 12/4/2019 BDL BDL BDL NA NA BDL BDL BDL 130 NA 5/27/2020 BDL BDL BDL NA NA BDL BDL BDL NA NA 12/10/2020 BDL BDL BDL NA NA BDL BDL BDL NA NA 7/16/2021 BDL BDL BDL NA NA BDL BDL BDL NA NA 12/20/2021 BDL BDL BDL NA NA BDL BDL BDL NA NA 6/7/2022 BDL BDL 227 NA NA BDL BDL BDL NA NA 12/29/2022 BDL BDL NA NA NA NA BDL NA NA NA 6/8/2023 BDL BDL 153 NA NA NA BDL NA NA NA 10/13/2016 BDL BDL BDL NA NA BDL BDL NA NA NA 5/17/2017 NA BDL NA NA NA NA NA NA NA NA 10/26/2017 NA NA NA NA NA BDL BDL NA NA NA 5/31/2018 BDL BDL BDL NA NA BDL BDL NA NA NA 12/6/2019 BDL BDL BDL NA NA BDL BDL BDL BDL NA 5/27/2020 BDL BDL BDL NA NA BDL BDL BDL NA NA 10/13/2016 BDL BDL 127 NA NA BDL BDL NA NA NA 5/17/2017 NA BDL NA NA NA NA NA NA NA NA 10/26/2017 NA NA NA NA NA BDL BDL NA NA NA 5/31/2018 BDL 8.3 44 NA NA 16 BDL NA NA NA 10/13/2016 106 BDL 161 NA NA BDL BDL NA NA NA 5/17/2017 NA BDL NA NA NA NA NA NA NA NA 10/26/2017 NA NA NA NA NA 5.1 8.5 NA NA NA 5/31/2018 BDL 31 140 NA NA 23 BDL NA NA NA 6/15/2019 BDL BDL BDL NA NA BDL BDL BDL 216 NA 12/6/2019 BDL BDL 224 NA NA BDL BDL BDL 181 NA 5/29/2020 BDL BDL BDL NA NA BDL BDL BDL NA NA 12/11/2020 BDL BDL BDL NA NA BDL BDL BDL NA NA 10/13/2016 NA BDL 64.3 NA NA BDL BDL NA NA NA 5/17/2017 NA 16.8 NA NA NA NA NA NA NA NA 10/26/2017 NA NA NA NA NA 14 BDL NA NA NA 5/31/2018 NA BDL 220 NA NA 24 BDL NA NA NA 6/15/2019 BDL BDL BDL NA NA BDL BDL BDL BDL NA 12/6/2019 BDL BDL BDL NA NA BDL BDL BDL BDL NA 5/29/2020 BDL BDL BDL NA NA BDL BDL BDL NA NA 12/11/2020 BDL BDL 273 NA NA BDL BDL BDL NA NA 10/13/2016 NA BDL BDL NA NA BDL BDL NA NA NA 5/17/2017 NA BDL NA NA NA NA NA NA NA NA 10/26/2017 NA NA NA NA NA BDL BDL NA NA NA 5/31/2018 NA BDL BDL NA NA BDL BDL NA NA NA 6/15/2019 BDL BDL BDL NA NA BDL BDL BDL BDL NA 12/6/2019 BDL BDL BDL NA NA BDL BDL BDL BDL NA 5/29/2020 BDL BDL BDL NA NA BDL BDL BDL NA NA MW-15 MW-20 MW-18 MW-19 MW-16 MW-17 Appendix C3 - Groundwater Analytical Data Groundwater Monitoring and Sampling Report - 1H2023 Former Gant Oil Company #823 4325 Old Rural Hall Road, Winston-Salem, North Carolina Well ID Date Sampled Methylene Chloride n-butylbenzene n-propylbenzene p- Isopropyltoluene 2-Hexanone sec- butylbenzene Styrene tert- butylbenzene Isopropyl Ether Carbon disulfide NC GCL Standard 5,000 6,900 30,000 NSE 28,000 8,500 70,000 15,000 70,000 410 9/24/2003 NA <1 3.1 NA NA <1 NA NA NA 1.9 2/8/2012 NA BDL 120 NA NA BDL BDL NA NA NA 10/13/2016 NA BDL 92.4 NA NA BDL BDL NA NA NA 5/17/2017 NA BDL NA NA NA NA NA NA NA NA 10/25/2017 NA NA NA NA NA BDL BDL NA NA NA 6/1/2018 NA BDL 43 NA NA BDL BDL NA NA NA 6/15/2019 BDL BDL 136 NA NA BDL BDL BDL 839 NA 12/4/2019 BDL BDL 165 NA NA BDL BDL BDL 770 NA 5/29/2020 BDL 25.2 BDL NA NA BDL BDL BDL NA NA 12/11/2020 BDL BDL 134 NA NA BDL BDL BDL NA NA 7/16/2021 BDL BDL BDL NA NA BDL BDL BDL NA NA 12/20/2021 BDL BDL BDL NA NA BDL BDL BDL NA NA 9/24/2003 NA NA NA NA NA NA NA NA NA NA 2/28/2004 NA NA NA NA NA NA NA NA NA NA 2/8/2012 NA BDL BDL NA NA BDL BDL NA NA NA 10/13/2016 NA BDL BDL NA NA BDL BDL NA NA NA 5/17/2017 NA BDL NA NA NA NA NA NA NA NA 10/25/2017 NA NA NA NA NA 1.6 BDL NA NA NA 6/1/2018 NA BDL BDL NA NA BDL BDL NA NA NA 6/15/2019 BDL BDL BDL NA NA BDL BDL BDL BDL NA 2/8/2012 NA 3.7 3 NA NA BDL BDL NA NA NA 10/13/2016 NA BDL 1.1 NA NA BDL BDL NA NA NA 5/17/2017 NA BDL NA NA NA NA NA NA NA NA 10/25/2017 NA NA NA NA NA 0.58 BDL NA NA NA 6/1/2018 NA BDL 13 NA NA BDL BDL NA NA NA 6/15/2019 BDL BDL 14.6 NA NA BDL BDL BDL 7.8 NA 12/4/2019 BDL BDL BDL NA NA BDL BDL BDL BDL NA 5/29/2020 BDL BDL BDL NA NA BDL BDL BDL NA NA 10/13/2016 NA BDL BDL NA NA BDL 6.4 NA NA NA 5/17/2017 NA BDL NA NA NA NA NA NA NA NA 10/25/2017 NA NA NA NA NA BDL NA NA NA NA 6/1/2018 NA BDL BDL NA NA BDL NA NA NA NA 6/15/2019 BDL BDL BDL NA NA BDL BDL BDL BDL NA 12/5/2019 BDL BDL BDL NA NA BDL BDL BDL BDL NA 5/27/2020 BDL BDL BDL NA NA BDL BDL BDL NA NA Notes: All results reported in micrograms per liter (ug/l) 2L Standard = NCAC listed 2L Standard for groundwater. GCL Standard = NC Gross Contamination Levels for groundwater. BDL = Below Detection Limits Bold and Highlighted values exceed the GCL Standards NSE = No Standard Established VEW-4 DW-3 DW-1 DW-2 NA = Not Analyzed Arcadis G&M of North Carolina, Inc. 5420 Wade Park Blvd, Suite 350 Raleigh, North Carolina 27607 Tel 919 854 1282 Fax 919 854 5448 www.arcadis.com