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HomeMy WebLinkAbout3603_AutenRdLF_December2022GWMR_FID1830592_20240222 SECOND SEMI-ANNUAL 2022 GROUNDWATER AND SURFACE WATER MONITORING EVENT GASTON COUNTY - CLOSED AUTEN LANDFILL GASTONIA, NORTH CAROLINA PERMIT NO.: 36-03 Prepared for: Mr. Dan Ziehm, PE Gaston County Public Works P.O. Box 1578 Gastonia, North Carolina 28053 July 24, 2023 Prepared by: _____________________________ Ross Klingman, P.G. Senior Geologist SECOND SEMI-ANNUAL 2022 GROUNDWATER AND SURFACE WATER MONITORING EVENT GASTON COUNTY - CLOSED AUTEN LANDFILL GASTONIA, NORTH CAROLINA PERMIT NO.: 36-03 TABLE OF CONTENTS 1.0 Introduction 1 2.0 Background Information 3 3.0 Groundwater and Surface Water Monitoring Activities 5 4.0 Groundwater Flow Direction 6 5.0 Groundwater and Surface Water Analytical Results 7 6.0 Conclusions 8 7.0 Recommendations 10 LIST OF FIGURES 1. Site Location Map 2. Site Layout Map 3. Shallow Groundwater Flow 4. Groundwater Analytical Results LIST OF TABLES 1. Groundwater Gauging Data 2. Field Parameter Data 3. Groundwater Analytical Results 4. Surface Water Analytical Results APPENDICES A. NCSWS Correspondence – PFAS Monitoring Requirements – March 13, 2023 & July 17, 2023 B. Laboratory Data Sheets C. Historical Groundwater Analytical Results Page | 1 SECOND SEMI-ANNUAL 2022 GROUNDWATER AND SURFACE WATER MONITORING EVENT GASTON COUNTY - CLOSED AUTEN LANDFILL GASTONIA, NORTH CAROLINA PERMIT NO.: 36-03 1.0 INTRODUCTION Buxton Environmental, Inc. (BEI) respectfully submits the methods and results of the second semi-annual 2022 groundwater and surface water monitoring activities conducted at the Gaston County - Closed Auten Landfill located along Monterey Park Drive in Gastonia, North Carolina. The purpose for conducting the assessment was to monitor groundwater, surface water and hydrogeologic conditions at the subject site. A site location map and site layout map are provided in Figures 1 and 2, respectively. The groundwater monitoring activities were conducted in general accordance with current North Carolina Department of Environmental Quality, Division of Waste Management-Solid Waste Section (NCSWS) rules and guidelines; the NCSWS groundwater and surface water sampling guidelines dated April 2008; the NCSWS letter dated September 9, 2016 concerning 14-day notification following a groundwater constituent exceedance of North Carolina Groundwater Protection Standards (NCGPSs) for the first-time; a March 23, 2017 memorandum from the NCSWS concerning routine up-keep and maintenance issues at monitoring wells; and a May 29, 2018 memorandum from the NCSWS requiring the analysis of 1,4-dioxane by EPA Method 8260 (VOCs) or EPA Method 8270 (semi-VOCs) utilizing the select ion monitoring (SIM) procedure, the discontinuation of Solid Waste Section Limits (SWSLs, minimum laboratory detection limits) and opting for EPA approved analytical methods sufficiently sensitive to quantify the presence of constituents at or below applicable standards. The NCGPSs are generally defined by the NCSWS as the most protective of the Federal Maximum Contaminant Level for Drinking Water (MCL), the North Carolina 2L Groundwater Quality Standards (2L NCGQSs), or NCGPSs established by the NCSWS (generally obtained from interim established 2L NCGQSs). The NCGPS and 2L NCGQS for non-naturally occurring constituents with no established standard is the practical quantitation limit (PQL). For naturally occurring constituents (i.e. metals), the NCGPS and the 2L NCGQS is the naturally occurring background concentration. For clarity purposes, the NCGPSs and 2L NCGQSs are essentially synonymous with each other. According to the NCGPSs and 2L NCGQSs, non- quantified J-flagged laboratory data (estimated qualified data) which are detected less than the quantifiable PQL, limit of quantitation (LOQ) or reporting limit (RL) (all synonyms) and above the method detection limit (MDL) (lowest non-quantified limits of the laboratory instrumentation) are not considered exceedances of NCGPSs or 2L NCGQSs. The NCGPSs in this report have been updated to reflect current standards issued by the NCSWS on April 11, 2022. On March 2, 2020, Mr. Ervin Lane with the NCSWS indicated that a new policy would allow permitted landfills to discontinue/reduce the required analysis of 1,4-dioxane (by EPA SIM) during routine monitoring at compliance groundwater monitor wells and surface water sample locations, if they have been below the MDL for two (2) consecutive events. On March 13, 2023, the NCSWS issued a memorandum requiring per- and polyfluoroalkyl substances (PFAS) analyses during groundwater, surface water and leachate monitoring conducted after July 1, 2023 at all landfills regulated under 15A NCAC 13B Rules for ,0601 and .0602 (all other landfills not regulated under .0531-0546 and .1600 rules); .0544 and .0545 (construction and demolition (C&D) landfills); and .1623, and .1630 - .1637 (Subtitle D lined municipal solid waste (MSW) landfills. According to the memo, PFAS include a group of manufactured compounds used in aerospace, automotive, textiles, electronics, food packaging, stain-repellent products, non-stick products and firefighting foams that do not breakdown in the environment and Page | 2 bioaccumulate in humans and animals through soil and drinking water and are linked to adverse health effects. On July 20, 2023, Mr. Perry Sugg (NCSWS Environmental Compliance Branch Head), clarified that PFAS monitoring was also required at old closed MSW landfills (this site) that fall under old NCSWS Rule .0500 that defaults to North Carolina 2L groundwater monitoring rules. Water samples should be analyzed by EPA (Draft) Method 1633 (PFAS) by a Department of Defense (DOD) accredited laboratory. The March 13, 2023 memorandum from the NCSWS regarding PFAS monitoring requirements is provided in Appendix A. On July 17, 2023, the NCSWS issued a memorandum clarifying PFAS monitoring requirements at solid waste sanitary landfills. The letter addresses landfill types that should comply; monitoring frequency (minimum of two (2) consecutive sample events, after which the data will be evaluated for future continued monitoring requirements); sampling methodology (including sampling practices and precautions to avoid equipment cross- contamination); analytical method and laboratories (EPA (Draft) Method 1633 for up to 40 PFAS compounds by a DOD accredited laboratory); monitoring locations (groundwater wells, surface water locations, underdrains and leachate); and reporting (routine report preparation and submittal, along with electronic deliverable data (EDD) requirements in the EQUIS format). The July 17, 2023 memorandum from the NCSWS clarifying PFAS monitoring requirements is provided in Appendix A. A summary of background information, and the methods, results, conclusions and recommendations of this investigation are outlined below. Page | 3 2.0 BACKGROUND INFORMATION Based on review of aerial photographs and discussions with Gaston County personnel, the subject facility operated from approximately 1963 until it closed in 1985. To comply with NCSWS guidelines, semi-annual groundwater monitoring was initiated in April 1997 at five shallow monitor wells MW-1 through MW-5. Groundwater samples have been analyzed for Appendix I volatile organic compounds (VOCs) and RCRA metals. Groundwater samples historically collected at the site indicated several VOCs and metals above the NCGPSs. Due to the presence of target constituents above the NCGPSs, the NCSWS requested that additional assessment be conducted to determine the extent of affected groundwater and the existence of surrounding water supply wells. According to a March 22, 2001 Site Assessment Activities for Auten Closed Landfill report prepared by Resolve Environmental Services, P.A., one deep monitor well MW-5A and one background monitor well MW- 6 were installed. Monitor well MW-5A was advanced adjacent to monitor well MW-5 to define the vertical extent of affected groundwater. Monitor well MW-6 was installed as a background well and was placed immediately adjacent to the former on-site landfill scale and maintenance garage along Monterey Park Drive. Groundwater samples collected at MW-5A did not indicate target constituents above the NCGPSs. Monitor well MW-6 indicated the presence of 180 micrograms per liter (ug/l) arsenic, 4,600 ug/l barium, 16 ug/l cadmium, 340 ug/l chromium, 240 ug/l lead, and 18 ug/l tetrachloroethene, which were above the NCGPSs. One water supply well was identified approximately 700 feet upgradient of the former landfill. In response to the March 2001 report, the NCSWS requested in a November 8, 2001 letter that additional assessment activities be conducted in the area of monitor well MW-6 to determine the source and extent of affected groundwater. Based on historical assessment activities, monitor well MW-6 is located hydrogeologically upgradient of the known on-site waste boundary and is immediately downgradient of a former off-site “stump dump”. The “stump dump” was not owned or operated by Gaston County. Buxton Environmental, Inc. submitted a Work Plan to Assess Affected Groundwater Detected at Monitor Well MW-6 to the NCSWS on February 8, 2002. The NCSWS approved the plan, with minor revisions outlined in their February 27, 2002 letter. From May 12 through 14, 2003, three shallow temporary monitor wells TW-1, TW-2 and TW-3 were installed along the property boundary immediately upgradient of monitor well MW-6 and downgradient of the off-site “stump-dump. The findings of this assessment are presented in a June 24, 2003 Groundwater Delineation and First Semi-Annual 2003 Groundwater and Surface Water Monitoring Event report prepared by BEI. Groundwater sample TW-2 indicated the presence of tetrachloroethene, and groundwater sample TW-3 indicated tetrachloroethene and trichloroethene above the NCGPSs. Groundwater sample TW-1 did not indicate the presence of target constituents above the NCGPSs. Based on groundwater analytical data and shallow groundwater flow direction, the former off-site “stump dump” area located upgradient and the immediate south of the site appears to be a potential source for VOC affected groundwater historically detected at monitor well MW-6. Several discarded drums and car part debris associated with the “stump dump” were also identified immediately upgradient of temporary monitor wells TW-2 and TW-3 during the May 16, 2004 sampling event. On February 12 and 13, 2018, Mr. Ross Klingman, P.G. with BEI conducted routine up-keep and maintenance at on-site monitor wells, in order to comply with the March 23, 2017 memorandum from the NCSWS. During these activities, repairs and up-keep were made at the following monitor wells: MW-1 (the lock latch was repaired, dirt and vegetation were removed from the concrete pad, a new lock was placed on the stand-up cover lid, and a well construction tag was placed on the stand-up cover); MW-2 (dirt and vegetation were removed from the concrete pad, a new expandable well cap was installed at the well head, and the original well Page | 4 construction tag was re-attached to the stand-up cover); MW-3 (dirt and vegetation were removed from the concrete pad, and the original well construction tag was re-attached to the stand-up cover); MW-4 (a well construction tag was placed on the stand-up cover and a new concrete pad was constructed around the base of the stand-up cover); MW-5 (the upper 3-feet of the PVC well casing was replaced (due to damage) and was joined to the original PVC casing with a PVC joint (no glue used) and concreted in-place around the joint), a well construction tag was placed on the stand-up cover, and a new concrete pad was constructed around the base of the stand-up cover); MW-5A (dirt and vegetation were removed from the cracked original concrete pad and a new concrete veneer was installed over the original cracked concrete pad); MW-6 (dirt and vegetation were removed from the concrete pad and a well construction tag was placed on the stand-up cover); TW-1 (dirt and vegetation were removed from the concrete pad); TW-2 (dirt and vegetation were removed from the concrete pad, a new expandable well cap was installed at the well head, and a well construction tag was placed on the stand-up cover); TW-3 (dirt and vegetation were removed from the concrete pad, and a new lock was placed on the stand-up cover lid, and a well construction tag was placed on the stand-up cover. During the well maintenance activities, the latitude and longitude at each groundwater monitor well were obtained with the “My GPS Coordinates” software, well construction information was obtained from the well tags, and the new top-of- casing elevation was determined for repaired monitor well MW-5, which are presented in Table 1. In accordance with the new NCSWS guidance regarding 1,4-dioxane (SIM) monitoring frequency, BEI recommended in the First Semi-Annual 2020 Groundwater and Surface Water Monitoring Event report dated September 8, 2020 that groundwater samples collected at monitor wells MW-1, MW-2, MW-3 and MW-4 will continue to be analyzed for 1,4-dioxane by EPA Method 8260D (SIM) until 1,4-dioxane has not been detected above the MDL for two (2) consecutive events. In addition, surface water samples Upstream and Downstream will continue to be analyzed for 1,4-dioxane by EPA 8260D (SIM) (have never indicated 1,4-dioxane above the MDL), in order to monitor on-site detections of 1,4-dioxane affected groundwater. All groundwater and surface water samples will continue to be analyzed for 1,4-dioxane (non-SIM) as part of the standard Appendix I VOC analysis (EPA Method 8260D; MDL = 13ug/l and PQL = 50 ug/l), for continued monitoring purposes. Page | 5 3.0 GROUNDWATER AND SURFACE WATER MONITORING ACTIVITIES On December 23 & 26, 2022, BEI conducted the second semi-annual 2022 groundwater and surface water monitoring event at the subject site. Groundwater monitoring activities were conducted at six (6) shallow monitor wells MW-1, MW-2, MW-3, MW-4, MW-5 and MW-6, one (1) deep monitor well MW-5A, and two (2) temporary monitor wells TW-2 and TW-3. Groundwater sampling at temporary monitor well TW-1 was unable to be conducted, due to dry conditions. During these activities, surface water samples Upstream and Downstream were also collected from Burton Branch Creek and Long Creek, respectively. Prior to conducting the sampling activities, groundwater levels were obtained from each well with a depth-to- water electrode to the nearest 0.01 foot. Following the gauging activities, each well was purged of three well bore volumes of water or until dryness with a disposable Teflon bailer attached to new nylon rope. Purge water was poured on the ground surface at respective well heads. Field parameters including pH, conductivity and temperature were collected following purging at each groundwater monitor well, and prior to sampling at each surface water sample location with a calibrated HANNA-Groline-HI9814 meter. Groundwater gauging and field parameter data are provided in Tables 1 and 2, respectively. The groundwater and surface water samples were analyzed for Appendix I VOCs by EPA Method 8260D (plus 1,4-dioxane (non-SIM)) and 8 RCRA metals by EPA Methods 6020B and 7470A. Groundwater samples collected at monitor wells MW-1, MW-2, MW-3 and MW-4 were also analyzed for 1,4-dioxane by EPA Method 8260D (SIM, to achieve the 3 ug/l LOQ/PQL/RL requirement), since 1,4-dioxane has been detected above the MDL for one or more of the past two (2) consecutive events. Surface water samples Upstream and Downstream were also analyzed for 1,4-dioxane by EPA 8260D (SIM) (have historically not indicated 1,4- dioxane above the MDL), in order to monitor on-site detections of 1,4-dioxane affected groundwater. The samples were analyzed by Pace Analytical Services, LLC (South Carolina License # 329) in West Columbia, South Carolina. The samples were collected in general accordance with NCSWS protocol, immediately poured into laboratory supplied containers, appropriately labeled (with sample identification, sample depth, date and time), placed in a cooler with wet ice, transferred to the laboratory with chain-of-custody documentation. During the groundwater sampling activities, Buxton Environmental, Inc. conducted a routine up-keep and maintenance inspection at on-site monitor wells, in order to comply with the March 23, 2017 memorandum from the NCSWS. The monitor wells were locked, appeared to be in good condition, and in compliance with NCSWS standards. Page | 6 4.0 GROUNDWATER FLOW DIRECTION Based on groundwater levels obtained on December 23 & 26, 2022 during the second semi-annual 2022 monitoring event, the general shallow groundwater flow on the western side of the site is to the north northwest toward Long Creek; and is to the east southeast and east northeast toward Long Creek and Burton Branch Creek on the eastern side of the site. Shallow groundwater flows to the north northwest, northeast and east southeast from the former off-site “stump dump” area toward the Auten Landfill. A shallow groundwater flow direction map is provided in Figure 3. A horizontal hydraulic gradient of 0.019 feet per feet (ft/ft) was observed between shallow monitor wells TW-3 and MW-2. An upward vertical hydraulic gradient of 0.009 ft/ft was observed between nested monitor wells MW-5 and MW-5A. Upward vertical hydraulic gradients are generally associated with groundwater discharge zones and downward vertical hydraulic gradients were generally associated with groundwater recharge zones. Page | 7 5.0 GROUNDWATER AND SURFACE WATER ANALYTICAL RESULTS The groundwater and surface water analytical results for the second semi-annual 2022 event are presented in Tables 3 and 4, respectively, and are illustrated in Figure 4. Laboratory data sheets are presented in Appendix B. Historical groundwater analytical results are presented in Appendix C. Groundwater samples collected at monitor wells MW-2, MW-3, MW-4 and MW-5 indicated the presence of target constituents above the NCGPSs, which are summarized below. Groundwater sample MW-2 indicated the presence of 2.7 ug/l benzene, 13 ug/l 1,4-dichlorobenzene, 170 ug/l 1,4-dioxane (non-SIM) and 110 ug/l 1,4- dioxane (SIM). Groundwater sample MW-3 indicated the presence of 2.8 ug/l benzene and 94 ug/l 1,4-dioxane (non-SIM) and 170 ug/l 1,4-dioxane (SIM). Groundwater sample MW-4 indicated the presence of 18 ug/l 1,4- dioxane (SIM). Groundwater sample MW-5 indicated the presence of 2.2 ug/l benzene and 10 ug/l 1,4- dichlorobenzene. The groundwater samples collected at monitor wells MW-1, MW-5A, MW-6, TW-2 and TW- 3 did not indicate target constituents above NCGPSs. Monitor wells MW-5, MW-5A, MW-6, TW-2 and TW-3, which had been removed from the 1,4-dioxane (SIM) monitoring schedule due to non-detects below MDLs for two (2) or more consecutive background monitoring events), did not indicate 1,4-dioxane (non-SIM) above the MDL during the second semi-annual 2022 sampling event. No target constituents were detected above NCGPSs for the first-time in any of the groundwater samples collected during the second semi-annual 2022 event, therefore, a 14-Day Notification of Groundwater Protection Standards Exceedance form is not required to be submitted to the NCSWS. The Downstream surface water sample indicated the presence of 4.4 ug/l 1,4-dioxane (SIM) above the lowest of: established North Carolina Surface Water and Wetland Standards (15A NCAC 02B) (Redbook, May 1, 2007)(NC2BRB); North Carolina 15A NCAC 02B Water Quality Standards for Surface Water (June 10, 2019) (NC2B); or North Carolina In-Steam Target Values for Surface Water (NCTSW) for Long Creek and Burton Branch Creek (Class C Water); or EPA National Recommended Water Quality Criteria for Aquatic Life and Human Health (EPAWQC), which are collectively referred to in this report as North Carolina Surface Water and Wetland Standards (NCSWWSs). The NCSWWS for 1,4-dioxane is 0.35 ug/l. The Upstream surface water sample did not indicate the presence of target constituents above the lowest of NCSWWSs. Page | 8 6.0 CONCLUSIONS On December 23 & 26, 2022, BEI conducted the second semi-annual 2022 groundwater and surface water monitoring activities at the Gaston County - Closed Auten Landfill located in Gastonia, North Carolina. A summary of the findings of this investigation is provided below. • On March 13, 2023, the NCSWS issued a memorandum requiring per- and polyfluoroalkyl substances (PFAS) analyses during groundwater, surface water and leachate monitoring conducted after July 1, 2023 at all landfills regulated under 15A NCAC 13B Rules for ,0601 and .0602 (all other landfills not regulated under .0531-0546 and .1600 rules); .0544 and .0545 (construction and demolition (C&D) landfills); and .1623, and .1630 - .1637 (Subtitle D lined municipal solid waste (MSW) landfills. According to the memo, PFAS include a group of manufactured compounds used in aerospace, automotive, textiles, electronics, food packaging, stain-repellent products, non-stick products and firefighting foams that do not breakdown in the environment and bioaccumulate in humans and animals through soil and drinking water and are linked to adverse health effects. On July 20, 2023, Mr. Perry Sugg (NCSWS Environmental Compliance Branch Head), clarified that PFAS monitoring was also required at old closed MSW landfills (this site) that fall under old NCSWS Rule .0500 that defaults to North Carolina 2L groundwater monitoring rules. Water samples should be analyzed by EPA (Draft) Method 1633 (PFAS) by a Department of Defense (DOD) accredited laboratory. • On July 17, 2023, the NCSWS issued a memorandum clarifying PFAS monitoring requirements at solid waste sanitary landfills. The letter addresses landfill types that should comply; monitoring frequency (minimum of two (2) consecutive sample events, after which the data will be evaluated for future continued monitoring requirements); sampling methodology (including sampling practices and precautions to avoid equipment cross-contamination); analytical method and laboratories (EPA (Draft) Method 1633 for up to 40 PFAS compounds by a DOD accredited laboratory); monitoring locations (groundwater wells, surface water locations, underdrains and leachate); and reporting (routine report preparation and submittal, along with electronic deliverable data (EDD) requirements in the EQUIS format). • During the sampling event, all monitor wells were locked, appeared to be in good condition and in compliance with NCSWS standards. • Shallow groundwater flow on the western side of the site is to the north northwest toward Long Creek; and is to the east southeast and east northeast toward Long Creek and Burton Branch Creek on the eastern side of the site. Shallow groundwater flows to the north northwest, northeast and east southeast from the former off-site “stump dump” area toward the Auten Landfill. A horizontal hydraulic gradient of 0.019 feet per feet (ft/ft) was observed between shallow monitor wells TW-3 and MW-2. An upward vertical hydraulic gradient of 0.009 ft/ft was observed between nested monitor wells MW-5 and MW- 5A. Upward vertical hydraulic gradients are generally associated with groundwater discharge zones and downward vertical hydraulic gradients were generally associated with groundwater recharge zones. • Groundwater samples collected at monitor wells MW-2, MW-3, MW-4 and MW-5 indicated the presence of target constituents above the NCGPSs, which are summarized below. Groundwater sample MW-2 indicated the presence of 2.7 ug/l benzene, 13 ug/l 1,4-dichlorobenzene, 170 ug/l 1,4-dioxane (non-SIM) and 110 ug/l 1,4-dioxane (SIM). Groundwater sample MW-3 indicated the presence of 2.8 ug/l benzene and 94 ug/l 1,4-dioxane (non-SIM) and 170 ug/l 1,4-dioxane (SIM). Groundwater sample MW-4 indicated the presence of 18 ug/l 1,4-dioxane (SIM). Groundwater sample MW-5 indicated the presence of 2.2 ug/l benzene and 10 ug/l 1,4-dichlorobenzene. The groundwater samples collected at monitor wells MW-1, MW-5A, MW-6, TW-2 and TW-3 did not indicate target constituents above NCGPSs. Page | 9 • Monitor wells MW-5, MW-5A, MW-6, TW-2 and TW-3, which had been removed from the 1,4- dioxane (SIM) monitoring schedule due to non-detects below MDLs for two (2) or more consecutive background monitoring events), did not indicate 1,4-dioxane (non-SIM) above the MDL during the second semi-annual 2022 sampling event. • No target constituents were detected above NCGPSs for the first-time in any of the groundwater samples collected during the second semi-annual 2022 event, therefore, a 14-Day Notification of Groundwater Protection Standards Exceedance form is not required to be submitted to the NCSWS. • The Downstream surface water sample indicated the presence of 4.4 ug/l 1,4-dioxane (SIM), which was above the NCSWWS of 0.35 ug/l. The Upstream surface water sample did not indicate the presence of target constituents above the lowest of NCSWWSs. Page | 10 7.0 RECOMMENDATIONS Based on the findings of this assessment, Buxton Environmental, Inc. makes the following recommendations. • Semi-annual groundwater and surface water monitoring, including Appendix I VOCs, RCRA metals and 1,4-dioxane (non-SIM/SIM) analysis, should continue to be conducted at the Closed Auten Landfill. In addition, groundwater and surface water samples should be analyzed for PFAS compounds by EPA (Draft) Method 1633 by a DOD accredited laboratory for the next two (2) semi-annual monitoring events, in accordance with the March 13 and July 17, 2023 memorandums issued by the NCSWS. The next semi- annual sampling event is anticipated to be conducted in August 2023. • Groundwater samples collected at monitor wells MW-1, MW-2, MW-3 and MW-4 will continue to be analyzed for 1,4-dioxane by EPA Method 8260D (SIM) until 1,4-dioxane has not been detected above the MDL for two (2) consecutive events. In addition, surface water samples Upstream and Downstream will continue to be analyzed for 1,4-dioxane by EPA 8260D (SIM) (have never indicated 1,4-dioxane above the MDL), in order to monitor on-site detections of 1,4-dioxane affected groundwater. All groundwater and surface water samples will continue to be analyzed for 1,4-dioxane (non-SIM) as part of the standard Appendix I VOC analysis (EPA Method 8260D; MDL = 13ug/l and PQL = 50 ug/l), for continued monitoring purposes. • A copy of this report should be forwarded to the NCSWS for their review. FIGURES TABLES TABLE 1 GROUNDWATER GAUGING DATA GASTON COUNTY - CLOSED AUTEN LANDFILL (PERMIT NO.: 36-03) GASTONIA, NORTH CAROLINA DECEMBER 23 & 26, 2022 Well ID Latitude Longitude Drilling Install TD TD Screen Sand Bentonite Grout TOC DTW DTW (degrees)(degrees)Company Date BTOC (ft)BGS (ft)Depth BGS (ft)BGS (ft)BGS (ft)BGS (ft)Elevation (ft)BTOC (ft)Elevation (ft) MW-1 35.305680 -81.144728 McCall Bro.6/23/94 20.5 17.5 7.5-17.5 5-17.5 3-5 0-3 657.71 3.65 654.06 MW-2 35.306639 -81.136249 McCall Bro.6/23/94 30 27.8 12.8-27.8 11-28 9-11 0-9 660.80 15.25 645.55 MW-3 35.304881 -81.135023 McCall Bro.6/24/94 32 29.5 14.5-29.5 13.5-29.5 11.5-13.5 0-11.5 668.87 20.64 648.23 MW-4 35.302603 -81.135472 McCall Bro.6/23/94 23.5 21 6-21 4-21 2-4 0-2 662.15 10.00 652.15 MW-5 35.303087 -81.138986 McCall Bro.6/23/94 21.5 19 4-19 3-19 1-3 0-1 667.54 9.45 658.09 MW-5A 35.303115 -81.138989 Geologic Ex.8/22/00 54 50 40-50 ------668.32 9.95 658.37 MW-6 35.303861 -81.142670 Geologic Ex.2001 43 41 31-41 29-31 27-29 0-27 700.54 30.15 670.39 TW-1 35.303156 -81.143129 Probe Tech.5/12/03 37.5 35 25-35 22-35 20-22 0-20 708.75 dry dry TW-2 35.303556 -81.142316 Probe Tech.5/14/03 40.25 38 23-38 21-38 19-21 0-19 709.58 37.48 672.10 TW-3 35.383478 -81.141597 Probe Tech.5/12/03 45.5 43 33-43 31-33 29-31 0-31 715.82 34.70 681.12 Notes: Depth to water measurements collected on December 23 and 26, 2022 to nearest 0.01 foot with a depth to water electrode. TD=total depth;BTOC=below top of casing;TOC=top of casing;DTW=depth to water;ft=feet TOC elevations at MW-1, MW-2, MW-3 and MW-4 are relative to mean sea level and were surveyed by Robinson & Sawyer, Inc. on August 24, 1994. TOC elevations at MW-5A and MW-6 were determined by Resolve Environmental Services on May 3, 2001 relative to existing well elevations. TOC elevations at TW-2 and TW-3 were determined by Buxton Environmental, Inc. on May 14, 2003 relative to TOC at MW-6. TOC elevation at TW-1 was determined by Buxton Environmental, Inc. on December 4, 2003 following repairs to this well. TOC elevation at MW-5 was determined by Buxton Environmental, Inc. on June 11, 2018 relative to TOC at MW-5A, following repairs to this well. Latitude and longitude determined on February 12 & 13, 2018 with My GPS Coordinates app. TABLE 2 FIELD PARAMETER DATA GASTON COUNTY - CLOSED AUTEN LANDFILL (PERMIT NO.: 36-03) GASTONIA, NORTH CAROLINA DECEMBER 23 & 26, 2022 Sample ID Field Parameters pH (standard units)K (uS/cm)T (Celsius) MW-1 6.03 190 8.6 MW-2 6.22 1,790 12.0 MW-3 6.35 1,470 11.9 MW-4 6.58 630 13.8 MW-5 6.24 680 12.8 MW-5A 6.72 190 5.7 MW-6 5.80 140 8.9 TW-1 dry dry dry TW-2 6.83 230 10.8 TW-3 5.82 180 8.3 Upstream 6.32 120 3.7 Downstream 6.78 110 5.1 Notes: Field parameters collected on December 23 & 26, 2022 by Buxton Environmental, Inc. utilizing a calibrated HANNA Groline HI9814 meter. Field parameters at monitor wells collected after purging 3 well volumes of water or until dryness with a disposable PVC bailer and new nylon string. SU = standard units uS/cm = microsiemens per centimeter K = conductivity; T = temperature "--" = limited water TABLE 3 GROUNDWATER ANALYTICAL RESULTS GASTON COUNTY - CLOSED AUTEN LANDFILL (PERMIT NO.: 36-03) GASTONIA, NORTH CAROLINA DECEMBER 23 & 26, 2022 Sample ID LOQ MDL MW-1 MW-2 MW-3 MW-4 MW-5 MW-5A MW-6 TW-1 TW-2 TW-3 NCGPS Appendix I VOCs (EPA 8260D) Benzene 1 0.4 BDL 2.7 2.8 BDL 2.2 BDL BDL NT*BDL BDL 1 Chlorobenzene 1 0.4 BDL 17 3.8 0.49J 14 BDL BDL NT*BDL BDL 50 Chloroform 1 0.4 BDL BDL BDL BDL BDL BDL 0.53J NT*0.43J 0.41J 70 1,2-Dichlorobenzene 1 0.4 BDL 1.3 1.5 BDL 1.5 BDL BDL NT*BDL BDL 20 1,4-Dichlorobenzene 1 0.4 BDL 13 9.8 0.94J 10 BDL BDL NT*BDL BDL 6 1,4-Dioxane 1 0.4 BDL 170 94 BDL BDL BDL BDL NT*BDL BDL 3 Methylene Chloride 1 0.4 BDL BDL BDL BDL BDL BDL BDL NT*BDL 0.53J 5 Toluene 1 0.4 BDL BDL 2.1 BDL BDL BDL BDL NT*BDL BDL 600 Xylenes 1 0.4 BDL 0.6J 6.1 BDL BDL BDL BDL NT*BDL BDL 500 EPA 8260D (SIM) 1,4-Dioxane 3 1 BDL 110 170 18 NT NT NT NT*NT NT 3 RCRA Metals (EPA 6020B & 7470A) Arsenic 2 1.3 1.3J 8.7 9.5 BDL 3.3 BDL BDL NT*BDL BDL 10 Barium 5 1.3 56 470 330 66 160 120 45 NT*83 89 700 Cadmium 0.5 0.13 0.22J 0.86 0.4J 0.28J 0.15J 0.38J 0.27J NT*BDL 1.3 2 Chromium 5 1.3 7.8 2.1J 2.1J BDL BDL BDL 1.4J NT*2J 2.3J 10 Lead 1 0.25 1.5 1.1 0.32J 0.34J BDL BDL 1.4 NT*5.6 3.9 15 Mercury 0.2 0.091 BDL BDL BDL BDL BDL BDL BDL NT*BDL BDL 1 Selenium 5 1.3 BDL 6 2.3J BDL BDL BDL BDL NT*BDL BDL 20 Notes:Groundwater samples collected on December 23 & 26, 2022 and analyzed for Appendix I volatile organic compounds (VOCs) by EPA Method 8260D (plus 1,4-dioxane (non-SIM)) and RCRA metals by EPA Methods 6020B and 7470A. Samples collected at MW-1, MW-2, MW-3 and MW-4 MW-7A also analyzed for 1,4-dioxane by EPA Method 8260D (SIM). Analyses by Pace Analytical Services, LLC. (NC Certification No.: 329) in West Columbia, SC. Groundwater sample collected after purging 3 well volumes of water or until dryness with a disposable PVC bailer and new nylon string. NCGPS=North Carolina Groundwater Protection Standard (April 11, 2022)LOQ = limit of quantitation (aka: report limit (RL) or practical quantitation limit (PQL)) is the lowest quantitation limit attainable by the EPA method MDL = method detection limit is the lowest qualified limit (estimated result) attainable by the EPA method BDL = Below Detection LimitNT = not tested; NT* = not tested due to dry conditions Bold and shade denotes groundwater sample above established NCGPS (J-flagged data not considered).data presented in micrograms per liter (ug/l) B = detected in method blank J = estimated result <LOQ or PQL and >=MDL (According to NCAC Title 15A Subchapter 2L North Carolina Groundwater Quality Standards (primary standard used to establish NCGPS's) dated April 1, 2013, J-flagged groundwater data exceeding the standard does not constitute an exceedance). TABLE 4 SURFACE WATER ANALYTICAL RESULTS GASTON COUNTY - CLOSED AUTEN LANDFILL (PERMIT NO.: 36-03) GASTONIA, NORTH CAROLINA DECEMBER 26, 2022 Sample ID LOQ MDL Upstream Downstream NCSWWS Appendix I VOCs (EPA 8260D)NA NA BDL BDL NA EPA 8260D (SIM) 1,4-Dioxane 3 1 BDL 4.4 0.35 (NCTSW) RCRA Metals (EPA 6020B & 7470A) Barium 5 1.3 52 27 1,000 (NC2BRB) Chromium 5 1.3 48 11 50 (NC2BRB) Lead 1 0.25 BDL 0.6J 25 (NC2BRB) Notes: Surface water samples collected on December 26, 2022 and analyzed for Appendix I volatile organic compounds (VOCs) by EPA Method 8260D; 1-4-Dioxane by EPA Method 8260D (select ion monitoring (SIM)); and RCRA metals by EPA 6020B and 7470A. Analyses by Pace Analytical Services, LLC (NC Certification No.: 329) in West Columbia, SC. LOQ = limit of quantitation (aka: report limit (RL) or practical quantitation limit (PQL)) is the lowest quantitation limit attainable by the EPA method MDL = method detection limit is the lowest qualified limit (estimated result) attainable by the EPA method BDL = Below Detection LimitNCSWWS = lowest of: established North Carolina Surface Water and Wetland Standards (15A NCAC 02B) (Redbook, May 1, 2007)(NC2BRB); North Carolina 15A NCAC 02B Water Quality Standards for Surface Water (June 10, 2019) (NC2B); or North Carolina In-Steam Target Values for Surface Water (NCTSW) for Long Creek and Burton Branch Creek (Class C Water); or EPA National Recommended Water Quality Criteria for Aquatic Life and Human Health (EPAWQC). Criteria. VOCs = volatile organic compounds data presented in micrograms per liter (ug/l) J = estimated result <LOQ and >=MDL B = detected in method blank NA = not applicable bold and shade denotes above established NCSWWS (J-flagged data not considered since estimated) APPENDIX A. NCSWS CORRESPONDENCE PFAS MONITORING REQUIREMENTS MARCH 13, 2023 & July 17, 2023 APPENDIX B LABORATORY DATA SHEETS The electronic signature above is the equivalent of a handwritten signature. This report shall not be reproduced,except in its entirety,without the written approval of Pace Analytical Services,LLC. Pace Analytical Services,LLC (formerly Shealy Environmental Services,Inc.) 106 Vantage Point Drive West Columbia,SC 29172 Tel:803-791-9700 Fax:803-791-9111 www.pacelabs.com Report of Analysis Buxton Environmental PO Box 11550 Charlotte,NC 28220 Attention:Ross Klingman Project Name:Gaston Co -Auten Landfill Project Number:NC Permit 3603 Lot Number:XL28042 Date Completed:01/10/2023 01/19/2023 12:23 AM Approved and released by: Project Manager II:Cathy S.Dover Page 1 of 72 PACE ANALYTICAL SERVICES,LLC SC DHEC No:32010001 NELAC No:E87653 NC DENR No:329 NC Field Parameters No:5639 Pace Analytical Services,LLC (formerly Shealy Environmetal Services,Inc.) 106 Vantage Point Drive West Columbia,SC 29172 (803)791-9700 Fax (803)791-9111 www.pacelabs.com Case Narrative Buxton Environmental Lot Number:XL28042 This Report of Analysis contains the analytical result(s)for the sample(s)listed on the Sample Summary following this Case Narrative.The sample receiving date is documented in the header information associated with each sample. All results listed in this report relate only to the samples that are contained within this report.Where sampling is conducted by the client,results relate to the accuracy of the information provided,and as the samples are received. Sample receipt,sample analysis,and data review have been performed in accordance with the most current approved The NELAC Institute (TNI)standards,the Pace Analytical Services,LLC ("Pace") Laboratory Quality Manual,standard operating procedures (SOPs),and Pace policies.Any exceptions to the TNI standards,the Laboratory Quality Manual,SOPs or policies are qualified on the results page or discussed below. Pace is a TNI accredited laboratory;however,the following analyses are currently not listed on our TNI scope of accreditation:Drinking Water:VOC (excluding BTEX,MTBE,Naphthalene,&1,2- dichloroethane)EPA 524.2,E.coli and Total coliforms SM 9223 B-2004,Solid Chemical Material:TOC Walkley-Black,Biological Tissue:All,Non-Potable Water:SGT-HEM EPA 1664B,Silica EPA 200.7, Boron,Calcium,Silicon,Strontium EPA 200.8,Bicarbonate,Carbonate,and Hydroxide Alkalinity SM 2320 B-2011,SM 9221 C E-2006 &SM 9222D-2006,Strontium SW-846 6010D,VOC SM 6200 B-2011,Fecal Coliform Colilert-18. VOA 8260D Insufficient sample volume was provided to perform matrix spike/matrix spike duplicate (MS/MSD)for analytical batch 64266.An LCS/LCSD was run in lieu of an MS/MSD.Associated samples: XL28042-007 (MW-6)(Run 1)(Analysis Batch 64266) XL28042-008 (TW-2)(Run 1)(Analysis Batch 64266) XL28042-009 (TW-3)(Run 1)(Analysis Batch 64266) The laboratory control sample (LCS)and /or laboratory control sample duplicate (LCSD)for analytical batch 64266 exceeded acceptance criteria for the following analytes:Acetone,2-butanone,1,4-dioxane and 2-hexanone.These analytes were biased high and were not detected in the associated samples: XL28042-007,XL28042-008,and XL28042-009. XL28042-007 (MW-6)(Run 1)(Analysis Batch 64266) XL28042-008 (TW-2)(Run 1)(Analysis Batch 64266) XL28042-009 (TW-3)(Run 1)(Analysis Batch 64266) Insufficient sample volume was provided to perform matrix spike/matrix spike duplicate (MS/MSD)for analytical batch 64265.An LCS/LCSD was run in lieu of an MS/MSD.Associated samples: XL28042-001 (MW-1)(Run 1)(Analysis Batch 64265) XL28042-002 (MW-2)(Run 1)(Analysis Batch 64265) XL28042-003 (MW-3)(Run 1)(Analysis Batch 64265) Page 2 of 72 PACE ANALYTICAL SERVICES,LLC SC DHEC No:32010001 NELAC No:E87653 NC DENR No:329 NC Field Parameters No:5639 Pace Analytical Services,LLC (formerly Shealy Environmetal Services,Inc.) 106 Vantage Point Drive West Columbia,SC 29172 (803)791-9700 Fax (803)791-9111 www.pacelabs.com XL28042-004 (MW-4)(Run 1)(Analysis Batch 64265) XL28042-005 (MW-5)(Run 1)(Analysis Batch 64265) XL28042-006 (MW-5A)(Run 1)(Analysis Batch 64265) XL28042-010 (Upstream)(Run 1)(Analysis Batch 64265) XL28042-011 (Downstream)(Run 1)(Analysis Batch 64265) Insufficient sample volume was provided to perform matrix spike/matrix spike duplicate (MS/MSD)for analytical batch 64337.An LCS/LCSD was run in lieu of an MS/MSD.Associated sample:XL28042-003 (MW-3)(Run 2)(Analysis Batch 64337) If you have any questions regarding this report,please contact the Pace Project Manager listed on the cover page. Page 3 of 72 PACE ANALYTICAL SERVICES, LLC Sample Summary Buxton Environmental Lot Number: XL28042 Project Name: Gaston Co - Auten Landfill Project Number: NC Permit 3603 Sample Number Sample ID Matrix Date Sampled Date Received 001 12/26/2022 1300MW-1 Aqueous 12/28/2022 002 12/26/2022 1330MW-2 Aqueous 12/28/2022 003 12/26/2022 1430MW-3 Aqueous 12/28/2022 004 12/26/2022 1500MW-4 Aqueous 12/28/2022 005 12/26/2022 1530MW-5 Aqueous 12/28/2022 006 12/26/2022 1600MW-5A Aqueous 12/28/2022 007 12/23/2022 1100MW-6 Aqueous 12/28/2022 008 12/23/2022 0930TW-2 Aqueous 12/28/2022 009 12/23/2022 1100TW-3 Aqueous 12/28/2022 010 12/26/2022 1630UpstreamAqueous 12/28/2022 011 12/26/2022 1400DownstreamAqueous 12/28/2022 (11 samples) 106 Vantage Point Drive West Columbia, SC 29172 (803) 791-9700 Fax (803) 791-9111 www.pacelabs.com Pace Analytical Services, LLC (formerly Shealy Environmental Services, Inc.) Page 4 of 72 PACE ANALYTICAL SERVICES, LLC Detection Summary Buxton Environmental Lot Number: XL28042 Project Name: Gaston Co - Auten Landfill Project Number: NC Permit 3603 Sample Sample ID Matrix Parameter Method Result Q Units Page 001 MW-1 Aqueous Arsenic 6020B 1.3 J ug/L 10 001 MW-1 Aqueous Barium 6020B 56 ug/L 10 001 MW-1 Aqueous Cadmium 6020B 0.22 J ug/L 10 001 MW-1 Aqueous Chromium 6020B 7.8 ug/L 10 001 MW-1 Aqueous Lead 6020B 1.5 ug/L 10 002 MW-2 Aqueous Benzene 8260D 2.7 ug/L 11 002 MW-2 Aqueous Chlorobenzene 8260D 17 ug/L 11 002 MW-2 Aqueous 1,2-Dichlorobenzene 8260D 1.3 ug/L 11 002 MW-2 Aqueous 1,4-Dichlorobenzene 8260D 13 ug/L 11 002 MW-2 Aqueous 1,4-Dioxane 8260D 170 ug/L 11 002 MW-2 Aqueous Xylenes (total)8260D 0.60 J ug/L 12 002 MW-2 Aqueous 1,4-Dioxane 8260D (SIM)110 ug/L 13 002 MW-2 Aqueous Arsenic 6020B 8.7 ug/L 14 002 MW-2 Aqueous Barium 6020B 470 ug/L 14 002 MW-2 Aqueous Cadmium 6020B 0.86 ug/L 14 002 MW-2 Aqueous Chromium 6020B 2.1 J ug/L 14 002 MW-2 Aqueous Lead 6020B 1.1 ug/L 14 002 MW-2 Aqueous Selenium 6020B 6.0 ug/L 14 003 MW-3 Aqueous Benzene 8260D 2.8 ug/L 15 003 MW-3 Aqueous Chlorobenzene 8260D 3.8 ug/L 15 003 MW-3 Aqueous 1,2-Dichlorobenzene 8260D 1.5 ug/L 15 003 MW-3 Aqueous 1,4-Dichlorobenzene 8260D 9.8 ug/L 15 003 MW-3 Aqueous 1,4-Dioxane 8260D 94 ug/L 15 003 MW-3 Aqueous Toluene 8260D 2.1 ug/L 15 003 MW-3 Aqueous Xylenes (total)8260D 6.1 ug/L 16 003 MW-3 Aqueous 1,4-Dioxane 8260D (SIM)170 ug/L 17 003 MW-3 Aqueous Arsenic 6020B 9.5 ug/L 18 003 MW-3 Aqueous Barium 6020B 330 ug/L 18 003 MW-3 Aqueous Cadmium 6020B 0.40 J ug/L 18 003 MW-3 Aqueous Chromium 6020B 2.1 J ug/L 18 003 MW-3 Aqueous Lead 6020B 0.32 J ug/L 18 003 MW-3 Aqueous Selenium 6020B 2.3 J ug/L 18 004 MW-4 Aqueous Chlorobenzene 8260D 0.49 J ug/L 19 004 MW-4 Aqueous 1,4-Dichlorobenzene 8260D 0.94 J ug/L 19 004 MW-4 Aqueous 1,4-Dioxane 8260D (SIM)18 ug/L 21 004 MW-4 Aqueous Barium 6020B 66 ug/L 22 004 MW-4 Aqueous Cadmium 6020B 0.28 J ug/L 22 004 MW-4 Aqueous Lead 6020B 0.34 J ug/L 22 005 MW-5 Aqueous Benzene 8260D 2.2 ug/L 23 005 MW-5 Aqueous Chlorobenzene 8260D 14 ug/L 23 005 MW-5 Aqueous 1,2-Dichlorobenzene 8260D 1.5 ug/L 23 005 MW-5 Aqueous 1,4-Dichlorobenzene 8260D 10 ug/L 23 005 MW-5 Aqueous Arsenic 6020B 3.3 ug/L 25 106 Vantage Point Drive West Columbia, SC 29172 (803) 791-9700 Fax (803) 791-9111 www.pacelabs.com Pace Analytical Services, LLC (formerly Shealy Environmental Services, Inc.) Page 5 of 72 Detection Summary (Continued) Lot Number: XL28042 Sample Sample ID Matrix Parameter Method Result Q Units Page 005 MW-5 Aqueous Barium 6020B 160 ug/L 25 005 MW-5 Aqueous Cadmium 6020B 0.15 J ug/L 25 006 MW-5A Aqueous Barium 6020B 120 ug/L 28 006 MW-5A Aqueous Cadmium 6020B 0.36 J ug/L 28 007 MW-6 Aqueous Chloroform 8260D 0.53 J ug/L 29 007 MW-6 Aqueous Barium 6020B 45 ug/L 31 007 MW-6 Aqueous Cadmium 6020B 0.27 J ug/L 31 007 MW-6 Aqueous Chromium 6020B 1.4 J ug/L 31 007 MW-6 Aqueous Lead 6020B 1.4 ug/L 31 008 TW-2 Aqueous Chloroform 8260D 0.43 J ug/L 32 008 TW-2 Aqueous Barium 6020B 83 ug/L 34 008 TW-2 Aqueous Chromium 6020B 2.0 J ug/L 34 008 TW-2 Aqueous Lead 6020B 5.6 ug/L 34 009 TW-3 Aqueous Chloroform 8260D 0.41 J ug/L 35 009 TW-3 Aqueous Methylene chloride 8260D 0.53 J ug/L 35 009 TW-3 Aqueous Barium 6020B 89 ug/L 37 009 TW-3 Aqueous Cadmium 6020B 1.3 ug/L 37 009 TW-3 Aqueous Chromium 6020B 2.3 J ug/L 37 009 TW-3 Aqueous Lead 6020B 3.9 ug/L 37 010 Upstream Aqueous Barium 6020B 52 ug/L 41 010 Upstream Aqueous Chromium 6020B 48 ug/L 41 011 Downstream Aqueous 1,4-Dioxane 8260D (SIM)4.4 ug/L 44 011 Downstream Aqueous Barium 6020B 27 ug/L 45 011 Downstream Aqueous Chromium 6020B 11 ug/L 45 011 Downstream Aqueous Lead 6020B 0.60 J ug/L 45 (68 detections) 106 Vantage Point Drive West Columbia, SC 29172 (803) 791-9700 Fax (803) 791-9111 www.pacelabs.com Pace Analytical Services, LLC (formerly Shealy Environmental Services, Inc.) Page 6 of 72 Volatile Organic Compounds by GC/MS Description:Matrix: Date Received: Client:Laboratory ID: Date Sampled: Buxton Environmental MW-1 XL28042-001 12/26/2022 1300 12/28/2022 Aqueous Project Name: Gaston Co - Auten Landfill Project Number: NC Permit 3603 Run Prep Method Analytical Method Dilution Analysis Date Analyst Prep Date Batch 1 5030B 8260D 1 01/06/2023 0555 JMM2 64265 AnalyticalCAS Parameter Number Method Result Q LOQ Units Run DL Acetone 67-64-1 8260D ND 1ug/L5.020 Acrylonitrile 107-13-1 8260D ND 1ug/L0.8020 Benzene 71-43-2 8260D ND 1ug/L0.401.0 Bromochloromethane 74-97-5 8260D ND 1ug/L0.401.0 Bromodichloromethane 75-27-4 8260D ND 1ug/L0.401.0 Bromoform 75-25-2 8260D ND 1ug/L0.401.0 Bromomethane (Methyl bromide)74-83-9 8260D ND 1ug/L0.402.0 2-Butanone (MEK)78-93-3 8260D ND 1ug/L2.010 Carbon disulfide 75-15-0 8260D ND 1ug/L0.401.0 Carbon tetrachloride 56-23-5 8260D ND 1ug/L0.401.0 Chlorobenzene 108-90-7 8260D ND 1ug/L0.401.0 Chloroethane 75-00-3 8260D ND 1ug/L0.402.0 Chloroform 67-66-3 8260D ND 1ug/L0.401.0 Chloromethane (Methyl chloride)74-87-3 8260D ND 1ug/L0.501.0 1,2-Dibromo-3-chloropropane (DBCP)96-12-8 8260D ND 1ug/L0.401.0 Dibromochloromethane 124-48-1 8260D ND 1ug/L0.401.0 1,2-Dibromoethane (EDB)106-93-4 8260D ND 1ug/L0.401.0 Dibromomethane (Methylene bromide)74-95-3 8260D ND 1ug/L0.401.0 trans-1,4-Dichloro-2-butene 110-57-6 8260D ND 1ug/L0.502.0 1,2-Dichlorobenzene 95-50-1 8260D ND 1ug/L0.401.0 1,4-Dichlorobenzene 106-46-7 8260D ND 1ug/L0.401.0 1,1-Dichloroethane 75-34-3 8260D ND 1ug/L0.401.0 1,2-Dichloroethane 107-06-2 8260D ND 1ug/L0.401.0 1,1-Dichloroethene 75-35-4 8260D ND 1ug/L0.401.0 cis-1,2-Dichloroethene 156-59-2 8260D ND 1ug/L0.401.0 trans-1,2-Dichloroethene 156-60-5 8260D ND 1ug/L0.401.0 1,2-Dichloropropane 78-87-5 8260D ND 1ug/L0.401.0 cis-1,3-Dichloropropene 10061-01-5 8260D ND 1ug/L0.401.0 trans-1,3-Dichloropropene 10061-02-6 8260D ND 1ug/L0.401.0 1,4-Dioxane 123-91-1 8260D ND 1ug/L1350 Ethylbenzene 100-41-4 8260D ND 1ug/L0.401.0 2-Hexanone 591-78-6 8260D ND 1ug/L2.010 Methyl iodide (Iodomethane)74-88-4 8260D ND 1ug/L0.405.0 4-Methyl-2-pentanone 108-10-1 8260D ND 1ug/L2.010 Methylene chloride 75-09-2 8260D ND 1ug/L0.401.0 Styrene 100-42-5 8260D ND 1ug/L0.411.0 1,1,1,2-Tetrachloroethane 630-20-6 8260D ND 1ug/L0.401.0 1,1,2,2-Tetrachloroethane 79-34-5 8260D ND 1ug/L0.401.0 Tetrachloroethene 127-18-4 8260D ND 1ug/L0.401.0 Toluene 108-88-3 8260D ND 1ug/L0.401.0 1,1,1-Trichloroethane 71-55-6 8260D ND 1ug/L0.401.0 1,1,2-Trichloroethane 79-00-5 8260D ND 1ug/L0.401.0 Trichloroethene 79-01-6 8260D ND 1ug/L0.401.0 Trichlorofluoromethane 75-69-4 8260D ND 1ug/L0.401.0 J = Estimated result < LOQ and > DL_ LOQ = Limit of Quantitation B = Detected in the method blank E = Quantitation of compound exceeded the calibration range P = The RPD between two GC columns exceeds 40%ND = Not detected at or above the DL N = Recovery is out of criteria H = Out of holding time Q = Surrogate failure L = LCS/LCSD failure S = MS/MSD failure DL = Detection Limit W = Reported on wet weight basis 106 Vantage Point Drive West Columbia, SC 29172 (803) 791-9700 Fax (803) 791-9111 www.pacelabs.com Pace Analytical Services, LLC (formerly Shealy Environmental Services, Inc.) Page 7 of 72 Volatile Organic Compounds by GC/MS Description:Matrix: Date Received: Client:Laboratory ID: Date Sampled: Buxton Environmental MW-1 XL28042-001 12/26/2022 1300 12/28/2022 Aqueous Project Name: Gaston Co - Auten Landfill Project Number: NC Permit 3603 Run Prep Method Analytical Method Dilution Analysis Date Analyst Prep Date Batch 1 5030B 8260D 1 01/06/2023 0555 JMM2 64265 AnalyticalCAS Parameter Number Method Result Q LOQ Units Run DL 1,2,3-Trichloropropane 96-18-4 8260D ND 1ug/L0.401.0 Vinyl acetate 108-05-4 8260D ND 1ug/L1.25.0 Vinyl chloride 75-01-4 8260D ND 1ug/L0.401.0 Xylenes (total)1330-20-7 8260D ND 1ug/L0.401.0 AcceptanceRun 1 Surrogate Q % Recovery Limits Bromofluorobenzene 92 70-130 1,2-Dichloroethane-d4 95 70-130 Toluene-d8 96 70-130 J = Estimated result < LOQ and > DL_ LOQ = Limit of Quantitation B = Detected in the method blank E = Quantitation of compound exceeded the calibration range P = The RPD between two GC columns exceeds 40%ND = Not detected at or above the DL N = Recovery is out of criteria H = Out of holding time Q = Surrogate failure L = LCS/LCSD failure S = MS/MSD failure DL = Detection Limit W = Reported on wet weight basis 106 Vantage Point Drive West Columbia, SC 29172 (803) 791-9700 Fax (803) 791-9111 www.pacelabs.com Pace Analytical Services, LLC (formerly Shealy Environmental Services, Inc.) Page 8 of 72 Volatile Organic Compounds by GC/MS (SIM) Description:Matrix: Date Received: Client:Laboratory ID: Date Sampled: Buxton Environmental MW-1 XL28042-001 12/26/2022 1300 12/28/2022 Aqueous Project Name: Gaston Co - Auten Landfill Project Number: NC Permit 3603 Run Prep Method Analytical Method Dilution Analysis Date Analyst Prep Date Batch 1 5030B 8260D (SIM)1 01/04/2023 1841 BLM 64133 AnalyticalCAS Parameter Number Method Result Q LOQ Units Run DL 1,4-Dioxane 123-91-1 8260D (SIM)ND 1ug/L1.03.0 AcceptanceRun 1 Surrogate Q % Recovery Limits 1,2-Dichloroethane-d4 93 40-170 J = Estimated result < LOQ and > DL_ LOQ = Limit of Quantitation B = Detected in the method blank E = Quantitation of compound exceeded the calibration range P = The RPD between two GC columns exceeds 40%ND = Not detected at or above the DL N = Recovery is out of criteria H = Out of holding time Q = Surrogate failure L = LCS/LCSD failure S = MS/MSD failure DL = Detection Limit W = Reported on wet weight basis 106 Vantage Point Drive West Columbia, SC 29172 (803) 791-9700 Fax (803) 791-9111 www.pacelabs.com Pace Analytical Services, LLC (formerly Shealy Environmental Services, Inc.) Page 9 of 72 ICP-MS Description:Matrix: Date Received: Client:Laboratory ID: Date Sampled: Buxton Environmental MW-1 XL28042-001 12/26/2022 1300 12/28/2022 Aqueous Project Name: Gaston Co - Auten Landfill Project Number: NC Permit 3603 Run Prep Method Analytical Method Dilution Analysis Date Analyst Prep Date Batch 1 7470A 1 12/29/2022 1328 JAB2 12/29/2022 0950 63783 1 3005A 6020B 1 01/04/2023 2038 BNW 01/03/2023 1029 63790 AnalyticalCAS Parameter Number Method Result Q LOQ Units Run DL Arsenic 7440-38-2 6020B 1.3 J 1ug/L1.32.0 Barium 7440-39-3 6020B 56 1ug/L1.35.0 Cadmium 7440-43-9 6020B 0.22 J 1ug/L0.130.50 Chromium 7440-47-3 6020B 7.8 1ug/L1.35.0 Lead 7439-92-1 6020B 1.5 1ug/L0.251.0 Mercury 7439-97-6 7470A ND 1mg/L0.0000910.00020 Selenium 7782-49-2 6020B ND 1ug/L1.35.0 Silver 7440-22-4 6020B ND 1ug/L0.251.0 J = Estimated result < LOQ and > DL_ LOQ = Limit of Quantitation B = Detected in the method blank E = Quantitation of compound exceeded the calibration range P = The RPD between two GC columns exceeds 40%ND = Not detected at or above the DL N = Recovery is out of criteria H = Out of holding time Q = Surrogate failure L = LCS/LCSD failure S = MS/MSD failure DL = Detection Limit W = Reported on wet weight basis 106 Vantage Point Drive West Columbia, SC 29172 (803) 791-9700 Fax (803) 791-9111 www.pacelabs.com Pace Analytical Services, LLC (formerly Shealy Environmental Services, Inc.) Page 10 of 72 Volatile Organic Compounds by GC/MS Description:Matrix: Date Received: Client:Laboratory ID: Date Sampled: Buxton Environmental MW-2 XL28042-002 12/26/2022 1330 12/28/2022 Aqueous Project Name: Gaston Co - Auten Landfill Project Number: NC Permit 3603 Run Prep Method Analytical Method Dilution Analysis Date Analyst Prep Date Batch 1 5030B 8260D 1 01/06/2023 0620 JMM2 64265 AnalyticalCAS Parameter Number Method Result Q LOQ Units Run DL Acetone 67-64-1 8260D ND 1ug/L5.020 Acrylonitrile 107-13-1 8260D ND 1ug/L0.8020 Benzene 71-43-2 8260D 2.7 1ug/L0.401.0 Bromochloromethane 74-97-5 8260D ND 1ug/L0.401.0 Bromodichloromethane 75-27-4 8260D ND 1ug/L0.401.0 Bromoform 75-25-2 8260D ND 1ug/L0.401.0 Bromomethane (Methyl bromide)74-83-9 8260D ND 1ug/L0.402.0 2-Butanone (MEK)78-93-3 8260D ND 1ug/L2.010 Carbon disulfide 75-15-0 8260D ND 1ug/L0.401.0 Carbon tetrachloride 56-23-5 8260D ND 1ug/L0.401.0 Chlorobenzene 108-90-7 8260D 17 1ug/L0.401.0 Chloroethane 75-00-3 8260D ND 1ug/L0.402.0 Chloroform 67-66-3 8260D ND 1ug/L0.401.0 Chloromethane (Methyl chloride)74-87-3 8260D ND 1ug/L0.501.0 1,2-Dibromo-3-chloropropane (DBCP)96-12-8 8260D ND 1ug/L0.401.0 Dibromochloromethane 124-48-1 8260D ND 1ug/L0.401.0 1,2-Dibromoethane (EDB)106-93-4 8260D ND 1ug/L0.401.0 Dibromomethane (Methylene bromide)74-95-3 8260D ND 1ug/L0.401.0 trans-1,4-Dichloro-2-butene 110-57-6 8260D ND 1ug/L0.502.0 1,2-Dichlorobenzene 95-50-1 8260D 1.3 1ug/L0.401.0 1,4-Dichlorobenzene 106-46-7 8260D 13 1ug/L0.401.0 1,1-Dichloroethane 75-34-3 8260D ND 1ug/L0.401.0 1,2-Dichloroethane 107-06-2 8260D ND 1ug/L0.401.0 1,1-Dichloroethene 75-35-4 8260D ND 1ug/L0.401.0 cis-1,2-Dichloroethene 156-59-2 8260D ND 1ug/L0.401.0 trans-1,2-Dichloroethene 156-60-5 8260D ND 1ug/L0.401.0 1,2-Dichloropropane 78-87-5 8260D ND 1ug/L0.401.0 cis-1,3-Dichloropropene 10061-01-5 8260D ND 1ug/L0.401.0 trans-1,3-Dichloropropene 10061-02-6 8260D ND 1ug/L0.401.0 1,4-Dioxane 123-91-1 8260D 170 1ug/L1350 Ethylbenzene 100-41-4 8260D ND 1ug/L0.401.0 2-Hexanone 591-78-6 8260D ND 1ug/L2.010 Methyl iodide (Iodomethane)74-88-4 8260D ND 1ug/L0.405.0 4-Methyl-2-pentanone 108-10-1 8260D ND 1ug/L2.010 Methylene chloride 75-09-2 8260D ND 1ug/L0.401.0 Styrene 100-42-5 8260D ND 1ug/L0.411.0 1,1,1,2-Tetrachloroethane 630-20-6 8260D ND 1ug/L0.401.0 1,1,2,2-Tetrachloroethane 79-34-5 8260D ND 1ug/L0.401.0 Tetrachloroethene 127-18-4 8260D ND 1ug/L0.401.0 Toluene 108-88-3 8260D ND 1ug/L0.401.0 1,1,1-Trichloroethane 71-55-6 8260D ND 1ug/L0.401.0 1,1,2-Trichloroethane 79-00-5 8260D ND 1ug/L0.401.0 Trichloroethene 79-01-6 8260D ND 1ug/L0.401.0 Trichlorofluoromethane 75-69-4 8260D ND 1ug/L0.401.0 J = Estimated result < LOQ and > DL_ LOQ = Limit of Quantitation B = Detected in the method blank E = Quantitation of compound exceeded the calibration range P = The RPD between two GC columns exceeds 40%ND = Not detected at or above the DL N = Recovery is out of criteria H = Out of holding time Q = Surrogate failure L = LCS/LCSD failure S = MS/MSD failure DL = Detection Limit W = Reported on wet weight basis 106 Vantage Point Drive West Columbia, SC 29172 (803) 791-9700 Fax (803) 791-9111 www.pacelabs.com Pace Analytical Services, LLC (formerly Shealy Environmental Services, Inc.) Page 11 of 72 Volatile Organic Compounds by GC/MS Description:Matrix: Date Received: Client:Laboratory ID: Date Sampled: Buxton Environmental MW-2 XL28042-002 12/26/2022 1330 12/28/2022 Aqueous Project Name: Gaston Co - Auten Landfill Project Number: NC Permit 3603 Run Prep Method Analytical Method Dilution Analysis Date Analyst Prep Date Batch 1 5030B 8260D 1 01/06/2023 0620 JMM2 64265 AnalyticalCAS Parameter Number Method Result Q LOQ Units Run DL 1,2,3-Trichloropropane 96-18-4 8260D ND 1ug/L0.401.0 Vinyl acetate 108-05-4 8260D ND 1ug/L1.25.0 Vinyl chloride 75-01-4 8260D ND 1ug/L0.401.0 Xylenes (total)1330-20-7 8260D 0.60 J 1ug/L0.401.0 AcceptanceRun 1 Surrogate Q % Recovery Limits Bromofluorobenzene 95 70-130 1,2-Dichloroethane-d4 93 70-130 Toluene-d8 97 70-130 J = Estimated result < LOQ and > DL_ LOQ = Limit of Quantitation B = Detected in the method blank E = Quantitation of compound exceeded the calibration range P = The RPD between two GC columns exceeds 40%ND = Not detected at or above the DL N = Recovery is out of criteria H = Out of holding time Q = Surrogate failure L = LCS/LCSD failure S = MS/MSD failure DL = Detection Limit W = Reported on wet weight basis 106 Vantage Point Drive West Columbia, SC 29172 (803) 791-9700 Fax (803) 791-9111 www.pacelabs.com Pace Analytical Services, LLC (formerly Shealy Environmental Services, Inc.) Page 12 of 72 Volatile Organic Compounds by GC/MS (SIM) Description:Matrix: Date Received: Client:Laboratory ID: Date Sampled: Buxton Environmental MW-2 XL28042-002 12/26/2022 1330 12/28/2022 Aqueous Project Name: Gaston Co - Auten Landfill Project Number: NC Permit 3603 Run Prep Method Analytical Method Dilution Analysis Date Analyst Prep Date Batch 1 5030B 8260D (SIM)1 01/04/2023 1905 BLM 64133 AnalyticalCAS Parameter Number Method Result Q LOQ Units Run DL 1,4-Dioxane 123-91-1 8260D (SIM)110 1ug/L1.03.0 AcceptanceRun 1 Surrogate Q % Recovery Limits 1,2-Dichloroethane-d4 92 40-170 J = Estimated result < LOQ and > DL_ LOQ = Limit of Quantitation B = Detected in the method blank E = Quantitation of compound exceeded the calibration range P = The RPD between two GC columns exceeds 40%ND = Not detected at or above the DL N = Recovery is out of criteria H = Out of holding time Q = Surrogate failure L = LCS/LCSD failure S = MS/MSD failure DL = Detection Limit W = Reported on wet weight basis 106 Vantage Point Drive West Columbia, SC 29172 (803) 791-9700 Fax (803) 791-9111 www.pacelabs.com Pace Analytical Services, LLC (formerly Shealy Environmental Services, Inc.) Page 13 of 72 ICP-MS Description:Matrix: Date Received: Client:Laboratory ID: Date Sampled: Buxton Environmental MW-2 XL28042-002 12/26/2022 1330 12/28/2022 Aqueous Project Name: Gaston Co - Auten Landfill Project Number: NC Permit 3603 Run Prep Method Analytical Method Dilution Analysis Date Analyst Prep Date Batch 1 7470A 1 12/29/2022 1331 JAB2 12/29/2022 0950 63783 1 3005A 6020B 1 01/04/2023 2130 BNW 01/03/2023 1029 63790 2 3005A 6020B 5 01/05/2023 1245 BNW 01/03/2023 1029 63790 AnalyticalCAS Parameter Number Method Result Q LOQ Units Run DL Arsenic 7440-38-2 6020B 8.7 1ug/L1.32.0 Barium 7440-39-3 6020B 470 2ug/L6.325 Cadmium 7440-43-9 6020B 0.86 1ug/L0.130.50 Chromium 7440-47-3 6020B 2.1 J 1ug/L1.35.0 Lead 7439-92-1 6020B 1.1 1ug/L0.251.0 Mercury 7439-97-6 7470A ND 1mg/L0.0000910.00020 Selenium 7782-49-2 6020B 6.0 1ug/L1.35.0 Silver 7440-22-4 6020B ND 1ug/L0.251.0 J = Estimated result < LOQ and > DL_ LOQ = Limit of Quantitation B = Detected in the method blank E = Quantitation of compound exceeded the calibration range P = The RPD between two GC columns exceeds 40%ND = Not detected at or above the DL N = Recovery is out of criteria H = Out of holding time Q = Surrogate failure L = LCS/LCSD failure S = MS/MSD failure DL = Detection Limit W = Reported on wet weight basis 106 Vantage Point Drive West Columbia, SC 29172 (803) 791-9700 Fax (803) 791-9111 www.pacelabs.com Pace Analytical Services, LLC (formerly Shealy Environmental Services, Inc.) Page 14 of 72 Volatile Organic Compounds by GC/MS Description:Matrix: Date Received: Client:Laboratory ID: Date Sampled: Buxton Environmental MW-3 XL28042-003 12/26/2022 1430 12/28/2022 Aqueous Project Name: Gaston Co - Auten Landfill Project Number: NC Permit 3603 Run Prep Method Analytical Method Dilution Analysis Date Analyst Prep Date Batch 1 5030B 8260D 1 01/06/2023 0646 JMM2 64265 AnalyticalCAS Parameter Number Method Result Q LOQ Units Run DL Acetone 67-64-1 8260D ND 1ug/L5.020 Acrylonitrile 107-13-1 8260D ND 1ug/L0.8020 Benzene 71-43-2 8260D 2.8 1ug/L0.401.0 Bromochloromethane 74-97-5 8260D ND 1ug/L0.401.0 Bromodichloromethane 75-27-4 8260D ND 1ug/L0.401.0 Bromoform 75-25-2 8260D ND 1ug/L0.401.0 Bromomethane (Methyl bromide)74-83-9 8260D ND 1ug/L0.402.0 2-Butanone (MEK)78-93-3 8260D ND 1ug/L2.010 Carbon disulfide 75-15-0 8260D ND 1ug/L0.401.0 Carbon tetrachloride 56-23-5 8260D ND 1ug/L0.401.0 Chlorobenzene 108-90-7 8260D 3.8 1ug/L0.401.0 Chloroethane 75-00-3 8260D ND 1ug/L0.402.0 Chloroform 67-66-3 8260D ND 1ug/L0.401.0 Chloromethane (Methyl chloride)74-87-3 8260D ND 1ug/L0.501.0 1,2-Dibromo-3-chloropropane (DBCP)96-12-8 8260D ND 1ug/L0.401.0 Dibromochloromethane 124-48-1 8260D ND 1ug/L0.401.0 1,2-Dibromoethane (EDB)106-93-4 8260D ND 1ug/L0.401.0 Dibromomethane (Methylene bromide)74-95-3 8260D ND 1ug/L0.401.0 trans-1,4-Dichloro-2-butene 110-57-6 8260D ND 1ug/L0.502.0 1,2-Dichlorobenzene 95-50-1 8260D 1.5 1ug/L0.401.0 1,4-Dichlorobenzene 106-46-7 8260D 9.8 1ug/L0.401.0 1,1-Dichloroethane 75-34-3 8260D ND 1ug/L0.401.0 1,2-Dichloroethane 107-06-2 8260D ND 1ug/L0.401.0 1,1-Dichloroethene 75-35-4 8260D ND 1ug/L0.401.0 cis-1,2-Dichloroethene 156-59-2 8260D ND 1ug/L0.401.0 trans-1,2-Dichloroethene 156-60-5 8260D ND 1ug/L0.401.0 1,2-Dichloropropane 78-87-5 8260D ND 1ug/L0.401.0 cis-1,3-Dichloropropene 10061-01-5 8260D ND 1ug/L0.401.0 trans-1,3-Dichloropropene 10061-02-6 8260D ND 1ug/L0.401.0 1,4-Dioxane 123-91-1 8260D 94 1ug/L1350 Ethylbenzene 100-41-4 8260D ND 1ug/L0.401.0 2-Hexanone 591-78-6 8260D ND 1ug/L2.010 Methyl iodide (Iodomethane)74-88-4 8260D ND 1ug/L0.405.0 4-Methyl-2-pentanone 108-10-1 8260D ND 1ug/L2.010 Methylene chloride 75-09-2 8260D ND 1ug/L0.401.0 Styrene 100-42-5 8260D ND 1ug/L0.411.0 1,1,1,2-Tetrachloroethane 630-20-6 8260D ND 1ug/L0.401.0 1,1,2,2-Tetrachloroethane 79-34-5 8260D ND 1ug/L0.401.0 Tetrachloroethene 127-18-4 8260D ND 1ug/L0.401.0 Toluene 108-88-3 8260D 2.1 1ug/L0.401.0 1,1,1-Trichloroethane 71-55-6 8260D ND 1ug/L0.401.0 1,1,2-Trichloroethane 79-00-5 8260D ND 1ug/L0.401.0 Trichloroethene 79-01-6 8260D ND 1ug/L0.401.0 Trichlorofluoromethane 75-69-4 8260D ND 1ug/L0.401.0 J = Estimated result < LOQ and > DL_ LOQ = Limit of Quantitation B = Detected in the method blank E = Quantitation of compound exceeded the calibration range P = The RPD between two GC columns exceeds 40%ND = Not detected at or above the DL N = Recovery is out of criteria H = Out of holding time Q = Surrogate failure L = LCS/LCSD failure S = MS/MSD failure DL = Detection Limit W = Reported on wet weight basis 106 Vantage Point Drive West Columbia, SC 29172 (803) 791-9700 Fax (803) 791-9111 www.pacelabs.com Pace Analytical Services, LLC (formerly Shealy Environmental Services, Inc.) Page 15 of 72 Volatile Organic Compounds by GC/MS Description:Matrix: Date Received: Client:Laboratory ID: Date Sampled: Buxton Environmental MW-3 XL28042-003 12/26/2022 1430 12/28/2022 Aqueous Project Name: Gaston Co - Auten Landfill Project Number: NC Permit 3603 Run Prep Method Analytical Method Dilution Analysis Date Analyst Prep Date Batch 1 5030B 8260D 1 01/06/2023 0646 JMM2 64265 AnalyticalCAS Parameter Number Method Result Q LOQ Units Run DL 1,2,3-Trichloropropane 96-18-4 8260D ND 1ug/L0.401.0 Vinyl acetate 108-05-4 8260D ND 1ug/L1.25.0 Vinyl chloride 75-01-4 8260D ND 1ug/L0.401.0 Xylenes (total)1330-20-7 8260D 6.1 1ug/L0.401.0 AcceptanceRun 1 Surrogate Q % Recovery Limits Bromofluorobenzene 90 70-130 1,2-Dichloroethane-d4 90 70-130 Toluene-d8 95 70-130 J = Estimated result < LOQ and > DL_ LOQ = Limit of Quantitation B = Detected in the method blank E = Quantitation of compound exceeded the calibration range P = The RPD between two GC columns exceeds 40%ND = Not detected at or above the DL N = Recovery is out of criteria H = Out of holding time Q = Surrogate failure L = LCS/LCSD failure S = MS/MSD failure DL = Detection Limit W = Reported on wet weight basis 106 Vantage Point Drive West Columbia, SC 29172 (803) 791-9700 Fax (803) 791-9111 www.pacelabs.com Pace Analytical Services, LLC (formerly Shealy Environmental Services, Inc.) Page 16 of 72 Volatile Organic Compounds by GC/MS (SIM) Description:Matrix: Date Received: Client:Laboratory ID: Date Sampled: Buxton Environmental MW-3 XL28042-003 12/26/2022 1430 12/28/2022 Aqueous Project Name: Gaston Co - Auten Landfill Project Number: NC Permit 3603 Run Prep Method Analytical Method Dilution Analysis Date Analyst Prep Date Batch 2 5030B 8260D (SIM)5 01/06/2023 1713 JWG 64337 AnalyticalCAS Parameter Number Method Result Q LOQ Units Run DL 1,4-Dioxane 123-91-1 8260D (SIM)170 2ug/L5.015 AcceptanceRun 2 Surrogate Q % Recovery Limits 1,2-Dichloroethane-d4 93 40-170 J = Estimated result < LOQ and > DL_ LOQ = Limit of Quantitation B = Detected in the method blank E = Quantitation of compound exceeded the calibration range P = The RPD between two GC columns exceeds 40%ND = Not detected at or above the DL N = Recovery is out of criteria H = Out of holding time Q = Surrogate failure L = LCS/LCSD failure S = MS/MSD failure DL = Detection Limit W = Reported on wet weight basis 106 Vantage Point Drive West Columbia, SC 29172 (803) 791-9700 Fax (803) 791-9111 www.pacelabs.com Pace Analytical Services, LLC (formerly Shealy Environmental Services, Inc.) Page 17 of 72 ICP-MS Description:Matrix: Date Received: Client:Laboratory ID: Date Sampled: Buxton Environmental MW-3 XL28042-003 12/26/2022 1430 12/28/2022 Aqueous Project Name: Gaston Co - Auten Landfill Project Number: NC Permit 3603 Run Prep Method Analytical Method Dilution Analysis Date Analyst Prep Date Batch 1 7470A 1 12/29/2022 1334 JAB2 12/29/2022 0950 63783 1 3005A 6020B 1 01/04/2023 2141 BNW 01/03/2023 1029 63790 2 3005A 6020B 5 01/05/2023 1256 BNW 01/03/2023 1029 63790 AnalyticalCAS Parameter Number Method Result Q LOQ Units Run DL Arsenic 7440-38-2 6020B 9.5 1ug/L1.32.0 Barium 7440-39-3 6020B 330 2ug/L6.325 Cadmium 7440-43-9 6020B 0.40 J 1ug/L0.130.50 Chromium 7440-47-3 6020B 2.1 J 1ug/L1.35.0 Lead 7439-92-1 6020B 0.32 J 1ug/L0.251.0 Mercury 7439-97-6 7470A ND 1mg/L0.0000910.00020 Selenium 7782-49-2 6020B 2.3 J 1ug/L1.35.0 Silver 7440-22-4 6020B ND 1ug/L0.251.0 J = Estimated result < LOQ and > DL_ LOQ = Limit of Quantitation B = Detected in the method blank E = Quantitation of compound exceeded the calibration range P = The RPD between two GC columns exceeds 40%ND = Not detected at or above the DL N = Recovery is out of criteria H = Out of holding time Q = Surrogate failure L = LCS/LCSD failure S = MS/MSD failure DL = Detection Limit W = Reported on wet weight basis 106 Vantage Point Drive West Columbia, SC 29172 (803) 791-9700 Fax (803) 791-9111 www.pacelabs.com Pace Analytical Services, LLC (formerly Shealy Environmental Services, Inc.) Page 18 of 72 Volatile Organic Compounds by GC/MS Description:Matrix: Date Received: Client:Laboratory ID: Date Sampled: Buxton Environmental MW-4 XL28042-004 12/26/2022 1500 12/28/2022 Aqueous Project Name: Gaston Co - Auten Landfill Project Number: NC Permit 3603 Run Prep Method Analytical Method Dilution Analysis Date Analyst Prep Date Batch 1 5030B 8260D 1 01/06/2023 0712 JMM2 64265 AnalyticalCAS Parameter Number Method Result Q LOQ Units Run DL Acetone 67-64-1 8260D ND 1ug/L5.020 Acrylonitrile 107-13-1 8260D ND 1ug/L0.8020 Benzene 71-43-2 8260D ND 1ug/L0.401.0 Bromochloromethane 74-97-5 8260D ND 1ug/L0.401.0 Bromodichloromethane 75-27-4 8260D ND 1ug/L0.401.0 Bromoform 75-25-2 8260D ND 1ug/L0.401.0 Bromomethane (Methyl bromide)74-83-9 8260D ND 1ug/L0.402.0 2-Butanone (MEK)78-93-3 8260D ND 1ug/L2.010 Carbon disulfide 75-15-0 8260D ND 1ug/L0.401.0 Carbon tetrachloride 56-23-5 8260D ND 1ug/L0.401.0 Chlorobenzene 108-90-7 8260D 0.49 J 1ug/L0.401.0 Chloroethane 75-00-3 8260D ND 1ug/L0.402.0 Chloroform 67-66-3 8260D ND 1ug/L0.401.0 Chloromethane (Methyl chloride)74-87-3 8260D ND 1ug/L0.501.0 1,2-Dibromo-3-chloropropane (DBCP)96-12-8 8260D ND 1ug/L0.401.0 Dibromochloromethane 124-48-1 8260D ND 1ug/L0.401.0 1,2-Dibromoethane (EDB)106-93-4 8260D ND 1ug/L0.401.0 Dibromomethane (Methylene bromide)74-95-3 8260D ND 1ug/L0.401.0 trans-1,4-Dichloro-2-butene 110-57-6 8260D ND 1ug/L0.502.0 1,2-Dichlorobenzene 95-50-1 8260D ND 1ug/L0.401.0 1,4-Dichlorobenzene 106-46-7 8260D 0.94 J 1ug/L0.401.0 1,1-Dichloroethane 75-34-3 8260D ND 1ug/L0.401.0 1,2-Dichloroethane 107-06-2 8260D ND 1ug/L0.401.0 1,1-Dichloroethene 75-35-4 8260D ND 1ug/L0.401.0 cis-1,2-Dichloroethene 156-59-2 8260D ND 1ug/L0.401.0 trans-1,2-Dichloroethene 156-60-5 8260D ND 1ug/L0.401.0 1,2-Dichloropropane 78-87-5 8260D ND 1ug/L0.401.0 cis-1,3-Dichloropropene 10061-01-5 8260D ND 1ug/L0.401.0 trans-1,3-Dichloropropene 10061-02-6 8260D ND 1ug/L0.401.0 1,4-Dioxane 123-91-1 8260D ND 1ug/L1350 Ethylbenzene 100-41-4 8260D ND 1ug/L0.401.0 2-Hexanone 591-78-6 8260D ND 1ug/L2.010 Methyl iodide (Iodomethane)74-88-4 8260D ND 1ug/L0.405.0 4-Methyl-2-pentanone 108-10-1 8260D ND 1ug/L2.010 Methylene chloride 75-09-2 8260D ND 1ug/L0.401.0 Styrene 100-42-5 8260D ND 1ug/L0.411.0 1,1,1,2-Tetrachloroethane 630-20-6 8260D ND 1ug/L0.401.0 1,1,2,2-Tetrachloroethane 79-34-5 8260D ND 1ug/L0.401.0 Tetrachloroethene 127-18-4 8260D ND 1ug/L0.401.0 Toluene 108-88-3 8260D ND 1ug/L0.401.0 1,1,1-Trichloroethane 71-55-6 8260D ND 1ug/L0.401.0 1,1,2-Trichloroethane 79-00-5 8260D ND 1ug/L0.401.0 Trichloroethene 79-01-6 8260D ND 1ug/L0.401.0 Trichlorofluoromethane 75-69-4 8260D ND 1ug/L0.401.0 J = Estimated result < LOQ and > DL_ LOQ = Limit of Quantitation B = Detected in the method blank E = Quantitation of compound exceeded the calibration range P = The RPD between two GC columns exceeds 40%ND = Not detected at or above the DL N = Recovery is out of criteria H = Out of holding time Q = Surrogate failure L = LCS/LCSD failure S = MS/MSD failure DL = Detection Limit W = Reported on wet weight basis 106 Vantage Point Drive West Columbia, SC 29172 (803) 791-9700 Fax (803) 791-9111 www.pacelabs.com Pace Analytical Services, LLC (formerly Shealy Environmental Services, Inc.) Page 19 of 72 Volatile Organic Compounds by GC/MS Description:Matrix: Date Received: Client:Laboratory ID: Date Sampled: Buxton Environmental MW-4 XL28042-004 12/26/2022 1500 12/28/2022 Aqueous Project Name: Gaston Co - Auten Landfill Project Number: NC Permit 3603 Run Prep Method Analytical Method Dilution Analysis Date Analyst Prep Date Batch 1 5030B 8260D 1 01/06/2023 0712 JMM2 64265 AnalyticalCAS Parameter Number Method Result Q LOQ Units Run DL 1,2,3-Trichloropropane 96-18-4 8260D ND 1ug/L0.401.0 Vinyl acetate 108-05-4 8260D ND 1ug/L1.25.0 Vinyl chloride 75-01-4 8260D ND 1ug/L0.401.0 Xylenes (total)1330-20-7 8260D ND 1ug/L0.401.0 AcceptanceRun 1 Surrogate Q % Recovery Limits Bromofluorobenzene 92 70-130 1,2-Dichloroethane-d4 91 70-130 Toluene-d8 96 70-130 J = Estimated result < LOQ and > DL_ LOQ = Limit of Quantitation B = Detected in the method blank E = Quantitation of compound exceeded the calibration range P = The RPD between two GC columns exceeds 40%ND = Not detected at or above the DL N = Recovery is out of criteria H = Out of holding time Q = Surrogate failure L = LCS/LCSD failure S = MS/MSD failure DL = Detection Limit W = Reported on wet weight basis 106 Vantage Point Drive West Columbia, SC 29172 (803) 791-9700 Fax (803) 791-9111 www.pacelabs.com Pace Analytical Services, LLC (formerly Shealy Environmental Services, Inc.) Page 20 of 72 Volatile Organic Compounds by GC/MS (SIM) Description:Matrix: Date Received: Client:Laboratory ID: Date Sampled: Buxton Environmental MW-4 XL28042-004 12/26/2022 1500 12/28/2022 Aqueous Project Name: Gaston Co - Auten Landfill Project Number: NC Permit 3603 Run Prep Method Analytical Method Dilution Analysis Date Analyst Prep Date Batch 1 5030B 8260D (SIM)1 01/04/2023 1954 BLM 64133 AnalyticalCAS Parameter Number Method Result Q LOQ Units Run DL 1,4-Dioxane 123-91-1 8260D (SIM)18 1ug/L1.03.0 AcceptanceRun 1 Surrogate Q % Recovery Limits 1,2-Dichloroethane-d4 94 40-170 J = Estimated result < LOQ and > DL_ LOQ = Limit of Quantitation B = Detected in the method blank E = Quantitation of compound exceeded the calibration range P = The RPD between two GC columns exceeds 40%ND = Not detected at or above the DL N = Recovery is out of criteria H = Out of holding time Q = Surrogate failure L = LCS/LCSD failure S = MS/MSD failure DL = Detection Limit W = Reported on wet weight basis 106 Vantage Point Drive West Columbia, SC 29172 (803) 791-9700 Fax (803) 791-9111 www.pacelabs.com Pace Analytical Services, LLC (formerly Shealy Environmental Services, Inc.) Page 21 of 72 ICP-MS Description:Matrix: Date Received: Client:Laboratory ID: Date Sampled: Buxton Environmental MW-4 XL28042-004 12/26/2022 1500 12/28/2022 Aqueous Project Name: Gaston Co - Auten Landfill Project Number: NC Permit 3603 Run Prep Method Analytical Method Dilution Analysis Date Analyst Prep Date Batch 1 7470A 1 12/29/2022 1336 JAB2 12/29/2022 0950 63783 1 3005A 6020B 1 01/04/2023 2151 BNW 01/03/2023 1029 63790 AnalyticalCAS Parameter Number Method Result Q LOQ Units Run DL Arsenic 7440-38-2 6020B ND 1ug/L1.32.0 Barium 7440-39-3 6020B 66 1ug/L1.35.0 Cadmium 7440-43-9 6020B 0.28 J 1ug/L0.130.50 Chromium 7440-47-3 6020B ND 1ug/L1.35.0 Lead 7439-92-1 6020B 0.34 J 1ug/L0.251.0 Mercury 7439-97-6 7470A ND 1mg/L0.0000910.00020 Selenium 7782-49-2 6020B ND 1ug/L1.35.0 Silver 7440-22-4 6020B ND 1ug/L0.251.0 J = Estimated result < LOQ and > DL_ LOQ = Limit of Quantitation B = Detected in the method blank E = Quantitation of compound exceeded the calibration range P = The RPD between two GC columns exceeds 40%ND = Not detected at or above the DL N = Recovery is out of criteria H = Out of holding time Q = Surrogate failure L = LCS/LCSD failure S = MS/MSD failure DL = Detection Limit W = Reported on wet weight basis 106 Vantage Point Drive West Columbia, SC 29172 (803) 791-9700 Fax (803) 791-9111 www.pacelabs.com Pace Analytical Services, LLC (formerly Shealy Environmental Services, Inc.) Page 22 of 72 Volatile Organic Compounds by GC/MS Description:Matrix: Date Received: Client:Laboratory ID: Date Sampled: Buxton Environmental MW-5 XL28042-005 12/26/2022 1530 12/28/2022 Aqueous Project Name: Gaston Co - Auten Landfill Project Number: NC Permit 3603 Run Prep Method Analytical Method Dilution Analysis Date Analyst Prep Date Batch 1 5030B 8260D 1 01/06/2023 0737 JMM2 64265 AnalyticalCAS Parameter Number Method Result Q LOQ Units Run DL Acetone 67-64-1 8260D ND 1ug/L5.020 Acrylonitrile 107-13-1 8260D ND 1ug/L0.8020 Benzene 71-43-2 8260D 2.2 1ug/L0.401.0 Bromochloromethane 74-97-5 8260D ND 1ug/L0.401.0 Bromodichloromethane 75-27-4 8260D ND 1ug/L0.401.0 Bromoform 75-25-2 8260D ND 1ug/L0.401.0 Bromomethane (Methyl bromide)74-83-9 8260D ND 1ug/L0.402.0 2-Butanone (MEK)78-93-3 8260D ND 1ug/L2.010 Carbon disulfide 75-15-0 8260D ND 1ug/L0.401.0 Carbon tetrachloride 56-23-5 8260D ND 1ug/L0.401.0 Chlorobenzene 108-90-7 8260D 14 1ug/L0.401.0 Chloroethane 75-00-3 8260D ND 1ug/L0.402.0 Chloroform 67-66-3 8260D ND 1ug/L0.401.0 Chloromethane (Methyl chloride)74-87-3 8260D ND 1ug/L0.501.0 1,2-Dibromo-3-chloropropane (DBCP)96-12-8 8260D ND 1ug/L0.401.0 Dibromochloromethane 124-48-1 8260D ND 1ug/L0.401.0 1,2-Dibromoethane (EDB)106-93-4 8260D ND 1ug/L0.401.0 Dibromomethane (Methylene bromide)74-95-3 8260D ND 1ug/L0.401.0 trans-1,4-Dichloro-2-butene 110-57-6 8260D ND 1ug/L0.502.0 1,2-Dichlorobenzene 95-50-1 8260D 1.5 1ug/L0.401.0 1,4-Dichlorobenzene 106-46-7 8260D 10 1ug/L0.401.0 1,1-Dichloroethane 75-34-3 8260D ND 1ug/L0.401.0 1,2-Dichloroethane 107-06-2 8260D ND 1ug/L0.401.0 1,1-Dichloroethene 75-35-4 8260D ND 1ug/L0.401.0 cis-1,2-Dichloroethene 156-59-2 8260D ND 1ug/L0.401.0 trans-1,2-Dichloroethene 156-60-5 8260D ND 1ug/L0.401.0 1,2-Dichloropropane 78-87-5 8260D ND 1ug/L0.401.0 cis-1,3-Dichloropropene 10061-01-5 8260D ND 1ug/L0.401.0 trans-1,3-Dichloropropene 10061-02-6 8260D ND 1ug/L0.401.0 1,4-Dioxane 123-91-1 8260D ND 1ug/L1350 Ethylbenzene 100-41-4 8260D ND 1ug/L0.401.0 2-Hexanone 591-78-6 8260D ND 1ug/L2.010 Methyl iodide (Iodomethane)74-88-4 8260D ND 1ug/L0.405.0 4-Methyl-2-pentanone 108-10-1 8260D ND 1ug/L2.010 Methylene chloride 75-09-2 8260D ND 1ug/L0.401.0 Styrene 100-42-5 8260D ND 1ug/L0.411.0 1,1,1,2-Tetrachloroethane 630-20-6 8260D ND 1ug/L0.401.0 1,1,2,2-Tetrachloroethane 79-34-5 8260D ND 1ug/L0.401.0 Tetrachloroethene 127-18-4 8260D ND 1ug/L0.401.0 Toluene 108-88-3 8260D ND 1ug/L0.401.0 1,1,1-Trichloroethane 71-55-6 8260D ND 1ug/L0.401.0 1,1,2-Trichloroethane 79-00-5 8260D ND 1ug/L0.401.0 Trichloroethene 79-01-6 8260D ND 1ug/L0.401.0 Trichlorofluoromethane 75-69-4 8260D ND 1ug/L0.401.0 J = Estimated result < LOQ and > DL_ LOQ = Limit of Quantitation B = Detected in the method blank E = Quantitation of compound exceeded the calibration range P = The RPD between two GC columns exceeds 40%ND = Not detected at or above the DL N = Recovery is out of criteria H = Out of holding time Q = Surrogate failure L = LCS/LCSD failure S = MS/MSD failure DL = Detection Limit W = Reported on wet weight basis 106 Vantage Point Drive West Columbia, SC 29172 (803) 791-9700 Fax (803) 791-9111 www.pacelabs.com Pace Analytical Services, LLC (formerly Shealy Environmental Services, Inc.) Page 23 of 72 Volatile Organic Compounds by GC/MS Description:Matrix: Date Received: Client:Laboratory ID: Date Sampled: Buxton Environmental MW-5 XL28042-005 12/26/2022 1530 12/28/2022 Aqueous Project Name: Gaston Co - Auten Landfill Project Number: NC Permit 3603 Run Prep Method Analytical Method Dilution Analysis Date Analyst Prep Date Batch 1 5030B 8260D 1 01/06/2023 0737 JMM2 64265 AnalyticalCAS Parameter Number Method Result Q LOQ Units Run DL 1,2,3-Trichloropropane 96-18-4 8260D ND 1ug/L0.401.0 Vinyl acetate 108-05-4 8260D ND 1ug/L1.25.0 Vinyl chloride 75-01-4 8260D ND 1ug/L0.401.0 Xylenes (total)1330-20-7 8260D ND 1ug/L0.401.0 AcceptanceRun 1 Surrogate Q % Recovery Limits Bromofluorobenzene 92 70-130 1,2-Dichloroethane-d4 91 70-130 Toluene-d8 95 70-130 J = Estimated result < LOQ and > DL_ LOQ = Limit of Quantitation B = Detected in the method blank E = Quantitation of compound exceeded the calibration range P = The RPD between two GC columns exceeds 40%ND = Not detected at or above the DL N = Recovery is out of criteria H = Out of holding time Q = Surrogate failure L = LCS/LCSD failure S = MS/MSD failure DL = Detection Limit W = Reported on wet weight basis 106 Vantage Point Drive West Columbia, SC 29172 (803) 791-9700 Fax (803) 791-9111 www.pacelabs.com Pace Analytical Services, LLC (formerly Shealy Environmental Services, Inc.) Page 24 of 72 ICP-MS Description:Matrix: Date Received: Client:Laboratory ID: Date Sampled: Buxton Environmental MW-5 XL28042-005 12/26/2022 1530 12/28/2022 Aqueous Project Name: Gaston Co - Auten Landfill Project Number: NC Permit 3603 Run Prep Method Analytical Method Dilution Analysis Date Analyst Prep Date Batch 1 7470A 1 12/29/2022 1339 JAB2 12/29/2022 0950 63783 1 3005A 6020B 1 01/04/2023 2202 BNW 01/03/2023 1029 63790 AnalyticalCAS Parameter Number Method Result Q LOQ Units Run DL Arsenic 7440-38-2 6020B 3.3 1ug/L1.32.0 Barium 7440-39-3 6020B 160 1ug/L1.35.0 Cadmium 7440-43-9 6020B 0.15 J 1ug/L0.130.50 Chromium 7440-47-3 6020B ND 1ug/L1.35.0 Lead 7439-92-1 6020B ND 1ug/L0.251.0 Mercury 7439-97-6 7470A ND 1mg/L0.0000910.00020 Selenium 7782-49-2 6020B ND 1ug/L1.35.0 Silver 7440-22-4 6020B ND 1ug/L0.251.0 J = Estimated result < LOQ and > DL_ LOQ = Limit of Quantitation B = Detected in the method blank E = Quantitation of compound exceeded the calibration range P = The RPD between two GC columns exceeds 40%ND = Not detected at or above the DL N = Recovery is out of criteria H = Out of holding time Q = Surrogate failure L = LCS/LCSD failure S = MS/MSD failure DL = Detection Limit W = Reported on wet weight basis 106 Vantage Point Drive West Columbia, SC 29172 (803) 791-9700 Fax (803) 791-9111 www.pacelabs.com Pace Analytical Services, LLC (formerly Shealy Environmental Services, Inc.) Page 25 of 72 Volatile Organic Compounds by GC/MS Description:Matrix: Date Received: Client:Laboratory ID: Date Sampled: Buxton Environmental MW-5A XL28042-006 12/26/2022 1600 12/28/2022 Aqueous Project Name: Gaston Co - Auten Landfill Project Number: NC Permit 3603 Run Prep Method Analytical Method Dilution Analysis Date Analyst Prep Date Batch 1 5030B 8260D 1 01/06/2023 0802 JMM2 64265 AnalyticalCAS Parameter Number Method Result Q LOQ Units Run DL Acetone 67-64-1 8260D ND 1ug/L5.020 Acrylonitrile 107-13-1 8260D ND 1ug/L0.8020 Benzene 71-43-2 8260D ND 1ug/L0.401.0 Bromochloromethane 74-97-5 8260D ND 1ug/L0.401.0 Bromodichloromethane 75-27-4 8260D ND 1ug/L0.401.0 Bromoform 75-25-2 8260D ND 1ug/L0.401.0 Bromomethane (Methyl bromide)74-83-9 8260D ND 1ug/L0.402.0 2-Butanone (MEK)78-93-3 8260D ND 1ug/L2.010 Carbon disulfide 75-15-0 8260D ND 1ug/L0.401.0 Carbon tetrachloride 56-23-5 8260D ND 1ug/L0.401.0 Chlorobenzene 108-90-7 8260D ND 1ug/L0.401.0 Chloroethane 75-00-3 8260D ND 1ug/L0.402.0 Chloroform 67-66-3 8260D ND 1ug/L0.401.0 Chloromethane (Methyl chloride)74-87-3 8260D ND 1ug/L0.501.0 1,2-Dibromo-3-chloropropane (DBCP)96-12-8 8260D ND 1ug/L0.401.0 Dibromochloromethane 124-48-1 8260D ND 1ug/L0.401.0 1,2-Dibromoethane (EDB)106-93-4 8260D ND 1ug/L0.401.0 Dibromomethane (Methylene bromide)74-95-3 8260D ND 1ug/L0.401.0 trans-1,4-Dichloro-2-butene 110-57-6 8260D ND 1ug/L0.502.0 1,2-Dichlorobenzene 95-50-1 8260D ND 1ug/L0.401.0 1,4-Dichlorobenzene 106-46-7 8260D ND 1ug/L0.401.0 1,1-Dichloroethane 75-34-3 8260D ND 1ug/L0.401.0 1,2-Dichloroethane 107-06-2 8260D ND 1ug/L0.401.0 1,1-Dichloroethene 75-35-4 8260D ND 1ug/L0.401.0 cis-1,2-Dichloroethene 156-59-2 8260D ND 1ug/L0.401.0 trans-1,2-Dichloroethene 156-60-5 8260D ND 1ug/L0.401.0 1,2-Dichloropropane 78-87-5 8260D ND 1ug/L0.401.0 cis-1,3-Dichloropropene 10061-01-5 8260D ND 1ug/L0.401.0 trans-1,3-Dichloropropene 10061-02-6 8260D ND 1ug/L0.401.0 1,4-Dioxane 123-91-1 8260D ND 1ug/L1350 Ethylbenzene 100-41-4 8260D ND 1ug/L0.401.0 2-Hexanone 591-78-6 8260D ND 1ug/L2.010 Methyl iodide (Iodomethane)74-88-4 8260D ND 1ug/L0.405.0 4-Methyl-2-pentanone 108-10-1 8260D ND 1ug/L2.010 Methylene chloride 75-09-2 8260D ND 1ug/L0.401.0 Styrene 100-42-5 8260D ND 1ug/L0.411.0 1,1,1,2-Tetrachloroethane 630-20-6 8260D ND 1ug/L0.401.0 1,1,2,2-Tetrachloroethane 79-34-5 8260D ND 1ug/L0.401.0 Tetrachloroethene 127-18-4 8260D ND 1ug/L0.401.0 Toluene 108-88-3 8260D ND 1ug/L0.401.0 1,1,1-Trichloroethane 71-55-6 8260D ND 1ug/L0.401.0 1,1,2-Trichloroethane 79-00-5 8260D ND 1ug/L0.401.0 Trichloroethene 79-01-6 8260D ND 1ug/L0.401.0 Trichlorofluoromethane 75-69-4 8260D ND 1ug/L0.401.0 J = Estimated result < LOQ and > DL_ LOQ = Limit of Quantitation B = Detected in the method blank E = Quantitation of compound exceeded the calibration range P = The RPD between two GC columns exceeds 40%ND = Not detected at or above the DL N = Recovery is out of criteria H = Out of holding time Q = Surrogate failure L = LCS/LCSD failure S = MS/MSD failure DL = Detection Limit W = Reported on wet weight basis 106 Vantage Point Drive West Columbia, SC 29172 (803) 791-9700 Fax (803) 791-9111 www.pacelabs.com Pace Analytical Services, LLC (formerly Shealy Environmental Services, Inc.) Page 26 of 72 Volatile Organic Compounds by GC/MS Description:Matrix: Date Received: Client:Laboratory ID: Date Sampled: Buxton Environmental MW-5A XL28042-006 12/26/2022 1600 12/28/2022 Aqueous Project Name: Gaston Co - Auten Landfill Project Number: NC Permit 3603 Run Prep Method Analytical Method Dilution Analysis Date Analyst Prep Date Batch 1 5030B 8260D 1 01/06/2023 0802 JMM2 64265 AnalyticalCAS Parameter Number Method Result Q LOQ Units Run DL 1,2,3-Trichloropropane 96-18-4 8260D ND 1ug/L0.401.0 Vinyl acetate 108-05-4 8260D ND 1ug/L1.25.0 Vinyl chloride 75-01-4 8260D ND 1ug/L0.401.0 Xylenes (total)1330-20-7 8260D ND 1ug/L0.401.0 AcceptanceRun 1 Surrogate Q % Recovery Limits Bromofluorobenzene 90 70-130 1,2-Dichloroethane-d4 93 70-130 Toluene-d8 94 70-130 J = Estimated result < LOQ and > DL_ LOQ = Limit of Quantitation B = Detected in the method blank E = Quantitation of compound exceeded the calibration range P = The RPD between two GC columns exceeds 40%ND = Not detected at or above the DL N = Recovery is out of criteria H = Out of holding time Q = Surrogate failure L = LCS/LCSD failure S = MS/MSD failure DL = Detection Limit W = Reported on wet weight basis 106 Vantage Point Drive West Columbia, SC 29172 (803) 791-9700 Fax (803) 791-9111 www.pacelabs.com Pace Analytical Services, LLC (formerly Shealy Environmental Services, Inc.) Page 27 of 72 ICP-MS Description:Matrix: Date Received: Client:Laboratory ID: Date Sampled: Buxton Environmental MW-5A XL28042-006 12/26/2022 1600 12/28/2022 Aqueous Project Name: Gaston Co - Auten Landfill Project Number: NC Permit 3603 Run Prep Method Analytical Method Dilution Analysis Date Analyst Prep Date Batch 1 7470A 1 12/29/2022 1342 JAB2 12/29/2022 0950 63783 1 3005A 6020B 1 01/04/2023 2233 BNW 01/03/2023 1029 63790 AnalyticalCAS Parameter Number Method Result Q LOQ Units Run DL Arsenic 7440-38-2 6020B ND 1ug/L1.32.0 Barium 7440-39-3 6020B 120 1ug/L1.35.0 Cadmium 7440-43-9 6020B 0.36 J 1ug/L0.130.50 Chromium 7440-47-3 6020B ND 1ug/L1.35.0 Lead 7439-92-1 6020B ND 1ug/L0.251.0 Mercury 7439-97-6 7470A ND 1mg/L0.0000910.00020 Selenium 7782-49-2 6020B ND 1ug/L1.35.0 Silver 7440-22-4 6020B ND 1ug/L0.251.0 J = Estimated result < LOQ and > DL_ LOQ = Limit of Quantitation B = Detected in the method blank E = Quantitation of compound exceeded the calibration range P = The RPD between two GC columns exceeds 40%ND = Not detected at or above the DL N = Recovery is out of criteria H = Out of holding time Q = Surrogate failure L = LCS/LCSD failure S = MS/MSD failure DL = Detection Limit W = Reported on wet weight basis 106 Vantage Point Drive West Columbia, SC 29172 (803) 791-9700 Fax (803) 791-9111 www.pacelabs.com Pace Analytical Services, LLC (formerly Shealy Environmental Services, Inc.) Page 28 of 72 Volatile Organic Compounds by GC/MS Description:Matrix: Date Received: Client:Laboratory ID: Date Sampled: Buxton Environmental MW-6 XL28042-007 12/23/2022 1100 12/28/2022 Aqueous Project Name: Gaston Co - Auten Landfill Project Number: NC Permit 3603 Run Prep Method Analytical Method Dilution Analysis Date Analyst Prep Date Batch 1 5030B 8260D 1 01/06/2023 0201 JMM2 64266 AnalyticalCAS Parameter Number Method Result Q LOQ Units Run DL Acetone 67-64-1 8260D ND L 1ug/L5.020 Acrylonitrile 107-13-1 8260D ND 1ug/L0.8020 Benzene 71-43-2 8260D ND 1ug/L0.401.0 Bromochloromethane 74-97-5 8260D ND 1ug/L0.401.0 Bromodichloromethane 75-27-4 8260D ND 1ug/L0.401.0 Bromoform 75-25-2 8260D ND 1ug/L0.401.0 Bromomethane (Methyl bromide)74-83-9 8260D ND 1ug/L0.402.0 2-Butanone (MEK)78-93-3 8260D ND L 1ug/L2.010 Carbon disulfide 75-15-0 8260D ND 1ug/L0.401.0 Carbon tetrachloride 56-23-5 8260D ND 1ug/L0.401.0 Chlorobenzene 108-90-7 8260D ND 1ug/L0.401.0 Chloroethane 75-00-3 8260D ND 1ug/L0.402.0 Chloroform 67-66-3 8260D 0.53 J 1ug/L0.401.0 Chloromethane (Methyl chloride)74-87-3 8260D ND 1ug/L0.501.0 1,2-Dibromo-3-chloropropane (DBCP)96-12-8 8260D ND 1ug/L0.401.0 Dibromochloromethane 124-48-1 8260D ND 1ug/L0.401.0 1,2-Dibromoethane (EDB)106-93-4 8260D ND 1ug/L0.401.0 Dibromomethane (Methylene bromide)74-95-3 8260D ND 1ug/L0.401.0 trans-1,4-Dichloro-2-butene 110-57-6 8260D ND 1ug/L0.502.0 1,2-Dichlorobenzene 95-50-1 8260D ND 1ug/L0.401.0 1,4-Dichlorobenzene 106-46-7 8260D ND 1ug/L0.401.0 1,1-Dichloroethane 75-34-3 8260D ND 1ug/L0.401.0 1,2-Dichloroethane 107-06-2 8260D ND 1ug/L0.401.0 1,1-Dichloroethene 75-35-4 8260D ND 1ug/L0.401.0 cis-1,2-Dichloroethene 156-59-2 8260D ND 1ug/L0.401.0 trans-1,2-Dichloroethene 156-60-5 8260D ND 1ug/L0.401.0 1,2-Dichloropropane 78-87-5 8260D ND 1ug/L0.401.0 cis-1,3-Dichloropropene 10061-01-5 8260D ND 1ug/L0.401.0 trans-1,3-Dichloropropene 10061-02-6 8260D ND 1ug/L0.401.0 1,4-Dioxane 123-91-1 8260D ND L 1ug/L1350 Ethylbenzene 100-41-4 8260D ND 1ug/L0.401.0 2-Hexanone 591-78-6 8260D ND L 1ug/L2.010 Methyl iodide (Iodomethane)74-88-4 8260D ND 1ug/L0.405.0 4-Methyl-2-pentanone 108-10-1 8260D ND 1ug/L2.010 Methylene chloride 75-09-2 8260D ND 1ug/L0.401.0 Styrene 100-42-5 8260D ND 1ug/L0.411.0 1,1,1,2-Tetrachloroethane 630-20-6 8260D ND 1ug/L0.401.0 1,1,2,2-Tetrachloroethane 79-34-5 8260D ND 1ug/L0.401.0 Tetrachloroethene 127-18-4 8260D ND 1ug/L0.401.0 Toluene 108-88-3 8260D ND 1ug/L0.401.0 1,1,1-Trichloroethane 71-55-6 8260D ND 1ug/L0.401.0 1,1,2-Trichloroethane 79-00-5 8260D ND 1ug/L0.401.0 Trichloroethene 79-01-6 8260D ND 1ug/L0.401.0 Trichlorofluoromethane 75-69-4 8260D ND 1ug/L0.401.0 J = Estimated result < LOQ and > DL_ LOQ = Limit of Quantitation B = Detected in the method blank E = Quantitation of compound exceeded the calibration range P = The RPD between two GC columns exceeds 40%ND = Not detected at or above the DL N = Recovery is out of criteria H = Out of holding time Q = Surrogate failure L = LCS/LCSD failure S = MS/MSD failure DL = Detection Limit W = Reported on wet weight basis 106 Vantage Point Drive West Columbia, SC 29172 (803) 791-9700 Fax (803) 791-9111 www.pacelabs.com Pace Analytical Services, LLC (formerly Shealy Environmental Services, Inc.) Page 29 of 72 Volatile Organic Compounds by GC/MS Description:Matrix: Date Received: Client:Laboratory ID: Date Sampled: Buxton Environmental MW-6 XL28042-007 12/23/2022 1100 12/28/2022 Aqueous Project Name: Gaston Co - Auten Landfill Project Number: NC Permit 3603 Run Prep Method Analytical Method Dilution Analysis Date Analyst Prep Date Batch 1 5030B 8260D 1 01/06/2023 0201 JMM2 64266 AnalyticalCAS Parameter Number Method Result Q LOQ Units Run DL 1,2,3-Trichloropropane 96-18-4 8260D ND 1ug/L0.401.0 Vinyl acetate 108-05-4 8260D ND 1ug/L1.25.0 Vinyl chloride 75-01-4 8260D ND 1ug/L0.401.0 Xylenes (total)1330-20-7 8260D ND 1ug/L0.401.0 AcceptanceRun 1 Surrogate Q % Recovery Limits Bromofluorobenzene 109 70-130 1,2-Dichloroethane-d4 109 70-130 Toluene-d8 111 70-130 J = Estimated result < LOQ and > DL_ LOQ = Limit of Quantitation B = Detected in the method blank E = Quantitation of compound exceeded the calibration range P = The RPD between two GC columns exceeds 40%ND = Not detected at or above the DL N = Recovery is out of criteria H = Out of holding time Q = Surrogate failure L = LCS/LCSD failure S = MS/MSD failure DL = Detection Limit W = Reported on wet weight basis 106 Vantage Point Drive West Columbia, SC 29172 (803) 791-9700 Fax (803) 791-9111 www.pacelabs.com Pace Analytical Services, LLC (formerly Shealy Environmental Services, Inc.) Page 30 of 72 ICP-MS Description:Matrix: Date Received: Client:Laboratory ID: Date Sampled: Buxton Environmental MW-6 XL28042-007 12/23/2022 1100 12/28/2022 Aqueous Project Name: Gaston Co - Auten Landfill Project Number: NC Permit 3603 Run Prep Method Analytical Method Dilution Analysis Date Analyst Prep Date Batch 1 7470A 1 12/29/2022 1344 JAB2 12/29/2022 0950 63783 1 3005A 6020B 1 01/04/2023 2244 BNW 01/03/2023 1029 63790 AnalyticalCAS Parameter Number Method Result Q LOQ Units Run DL Arsenic 7440-38-2 6020B ND 1ug/L1.32.0 Barium 7440-39-3 6020B 45 1ug/L1.35.0 Cadmium 7440-43-9 6020B 0.27 J 1ug/L0.130.50 Chromium 7440-47-3 6020B 1.4 J 1ug/L1.35.0 Lead 7439-92-1 6020B 1.4 1ug/L0.251.0 Mercury 7439-97-6 7470A ND 1mg/L0.0000910.00020 Selenium 7782-49-2 6020B ND 1ug/L1.35.0 Silver 7440-22-4 6020B ND 1ug/L0.251.0 J = Estimated result < LOQ and > DL_ LOQ = Limit of Quantitation B = Detected in the method blank E = Quantitation of compound exceeded the calibration range P = The RPD between two GC columns exceeds 40%ND = Not detected at or above the DL N = Recovery is out of criteria H = Out of holding time Q = Surrogate failure L = LCS/LCSD failure S = MS/MSD failure DL = Detection Limit W = Reported on wet weight basis 106 Vantage Point Drive West Columbia, SC 29172 (803) 791-9700 Fax (803) 791-9111 www.pacelabs.com Pace Analytical Services, LLC (formerly Shealy Environmental Services, Inc.) Page 31 of 72 Volatile Organic Compounds by GC/MS Description:Matrix: Date Received: Client:Laboratory ID: Date Sampled: Buxton Environmental TW-2 XL28042-008 12/23/2022 0930 12/28/2022 Aqueous Project Name: Gaston Co - Auten Landfill Project Number: NC Permit 3603 Run Prep Method Analytical Method Dilution Analysis Date Analyst Prep Date Batch 1 5030B 8260D 1 01/06/2023 0226 JMM2 64266 AnalyticalCAS Parameter Number Method Result Q LOQ Units Run DL Acetone 67-64-1 8260D ND L 1ug/L5.020 Acrylonitrile 107-13-1 8260D ND 1ug/L0.8020 Benzene 71-43-2 8260D ND 1ug/L0.401.0 Bromochloromethane 74-97-5 8260D ND 1ug/L0.401.0 Bromodichloromethane 75-27-4 8260D ND 1ug/L0.401.0 Bromoform 75-25-2 8260D ND 1ug/L0.401.0 Bromomethane (Methyl bromide)74-83-9 8260D ND 1ug/L0.402.0 2-Butanone (MEK)78-93-3 8260D ND L 1ug/L2.010 Carbon disulfide 75-15-0 8260D ND 1ug/L0.401.0 Carbon tetrachloride 56-23-5 8260D ND 1ug/L0.401.0 Chlorobenzene 108-90-7 8260D ND 1ug/L0.401.0 Chloroethane 75-00-3 8260D ND 1ug/L0.402.0 Chloroform 67-66-3 8260D 0.43 J 1ug/L0.401.0 Chloromethane (Methyl chloride)74-87-3 8260D ND 1ug/L0.501.0 1,2-Dibromo-3-chloropropane (DBCP)96-12-8 8260D ND 1ug/L0.401.0 Dibromochloromethane 124-48-1 8260D ND 1ug/L0.401.0 1,2-Dibromoethane (EDB)106-93-4 8260D ND 1ug/L0.401.0 Dibromomethane (Methylene bromide)74-95-3 8260D ND 1ug/L0.401.0 trans-1,4-Dichloro-2-butene 110-57-6 8260D ND 1ug/L0.502.0 1,2-Dichlorobenzene 95-50-1 8260D ND 1ug/L0.401.0 1,4-Dichlorobenzene 106-46-7 8260D ND 1ug/L0.401.0 1,1-Dichloroethane 75-34-3 8260D ND 1ug/L0.401.0 1,2-Dichloroethane 107-06-2 8260D ND 1ug/L0.401.0 1,1-Dichloroethene 75-35-4 8260D ND 1ug/L0.401.0 cis-1,2-Dichloroethene 156-59-2 8260D ND 1ug/L0.401.0 trans-1,2-Dichloroethene 156-60-5 8260D ND 1ug/L0.401.0 1,2-Dichloropropane 78-87-5 8260D ND 1ug/L0.401.0 cis-1,3-Dichloropropene 10061-01-5 8260D ND 1ug/L0.401.0 trans-1,3-Dichloropropene 10061-02-6 8260D ND 1ug/L0.401.0 1,4-Dioxane 123-91-1 8260D ND L 1ug/L1350 Ethylbenzene 100-41-4 8260D ND 1ug/L0.401.0 2-Hexanone 591-78-6 8260D ND L 1ug/L2.010 Methyl iodide (Iodomethane)74-88-4 8260D ND 1ug/L0.405.0 4-Methyl-2-pentanone 108-10-1 8260D ND 1ug/L2.010 Methylene chloride 75-09-2 8260D ND 1ug/L0.401.0 Styrene 100-42-5 8260D ND 1ug/L0.411.0 1,1,1,2-Tetrachloroethane 630-20-6 8260D ND 1ug/L0.401.0 1,1,2,2-Tetrachloroethane 79-34-5 8260D ND 1ug/L0.401.0 Tetrachloroethene 127-18-4 8260D ND 1ug/L0.401.0 Toluene 108-88-3 8260D ND 1ug/L0.401.0 1,1,1-Trichloroethane 71-55-6 8260D ND 1ug/L0.401.0 1,1,2-Trichloroethane 79-00-5 8260D ND 1ug/L0.401.0 Trichloroethene 79-01-6 8260D ND 1ug/L0.401.0 Trichlorofluoromethane 75-69-4 8260D ND 1ug/L0.401.0 J = Estimated result < LOQ and > DL_ LOQ = Limit of Quantitation B = Detected in the method blank E = Quantitation of compound exceeded the calibration range P = The RPD between two GC columns exceeds 40%ND = Not detected at or above the DL N = Recovery is out of criteria H = Out of holding time Q = Surrogate failure L = LCS/LCSD failure S = MS/MSD failure DL = Detection Limit W = Reported on wet weight basis 106 Vantage Point Drive West Columbia, SC 29172 (803) 791-9700 Fax (803) 791-9111 www.pacelabs.com Pace Analytical Services, LLC (formerly Shealy Environmental Services, Inc.) Page 32 of 72 Volatile Organic Compounds by GC/MS Description:Matrix: Date Received: Client:Laboratory ID: Date Sampled: Buxton Environmental TW-2 XL28042-008 12/23/2022 0930 12/28/2022 Aqueous Project Name: Gaston Co - Auten Landfill Project Number: NC Permit 3603 Run Prep Method Analytical Method Dilution Analysis Date Analyst Prep Date Batch 1 5030B 8260D 1 01/06/2023 0226 JMM2 64266 AnalyticalCAS Parameter Number Method Result Q LOQ Units Run DL 1,2,3-Trichloropropane 96-18-4 8260D ND 1ug/L0.401.0 Vinyl acetate 108-05-4 8260D ND 1ug/L1.25.0 Vinyl chloride 75-01-4 8260D ND 1ug/L0.401.0 Xylenes (total)1330-20-7 8260D ND 1ug/L0.401.0 AcceptanceRun 1 Surrogate Q % Recovery Limits Bromofluorobenzene 108 70-130 1,2-Dichloroethane-d4 108 70-130 Toluene-d8 112 70-130 J = Estimated result < LOQ and > DL_ LOQ = Limit of Quantitation B = Detected in the method blank E = Quantitation of compound exceeded the calibration range P = The RPD between two GC columns exceeds 40%ND = Not detected at or above the DL N = Recovery is out of criteria H = Out of holding time Q = Surrogate failure L = LCS/LCSD failure S = MS/MSD failure DL = Detection Limit W = Reported on wet weight basis 106 Vantage Point Drive West Columbia, SC 29172 (803) 791-9700 Fax (803) 791-9111 www.pacelabs.com Pace Analytical Services, LLC (formerly Shealy Environmental Services, Inc.) Page 33 of 72 ICP-MS Description:Matrix: Date Received: Client:Laboratory ID: Date Sampled: Buxton Environmental TW-2 XL28042-008 12/23/2022 0930 12/28/2022 Aqueous Project Name: Gaston Co - Auten Landfill Project Number: NC Permit 3603 Run Prep Method Analytical Method Dilution Analysis Date Analyst Prep Date Batch 1 7470A 1 12/29/2022 1429 JAB2 12/29/2022 0950 63783 1 3005A 6020B 1 01/04/2023 2254 BNW 01/03/2023 1029 63790 AnalyticalCAS Parameter Number Method Result Q LOQ Units Run DL Arsenic 7440-38-2 6020B ND 1ug/L1.32.0 Barium 7440-39-3 6020B 83 1ug/L1.35.0 Cadmium 7440-43-9 6020B ND 1ug/L0.130.50 Chromium 7440-47-3 6020B 2.0 J 1ug/L1.35.0 Lead 7439-92-1 6020B 5.6 1ug/L0.251.0 Mercury 7439-97-6 7470A ND 1mg/L0.0000910.00020 Selenium 7782-49-2 6020B ND 1ug/L1.35.0 Silver 7440-22-4 6020B ND 1ug/L0.251.0 J = Estimated result < LOQ and > DL_ LOQ = Limit of Quantitation B = Detected in the method blank E = Quantitation of compound exceeded the calibration range P = The RPD between two GC columns exceeds 40%ND = Not detected at or above the DL N = Recovery is out of criteria H = Out of holding time Q = Surrogate failure L = LCS/LCSD failure S = MS/MSD failure DL = Detection Limit W = Reported on wet weight basis 106 Vantage Point Drive West Columbia, SC 29172 (803) 791-9700 Fax (803) 791-9111 www.pacelabs.com Pace Analytical Services, LLC (formerly Shealy Environmental Services, Inc.) Page 34 of 72 Volatile Organic Compounds by GC/MS Description:Matrix: Date Received: Client:Laboratory ID: Date Sampled: Buxton Environmental TW-3 XL28042-009 12/23/2022 1100 12/28/2022 Aqueous Project Name: Gaston Co - Auten Landfill Project Number: NC Permit 3603 Run Prep Method Analytical Method Dilution Analysis Date Analyst Prep Date Batch 1 5030B 8260D 1 01/06/2023 0251 JMM2 64266 AnalyticalCAS Parameter Number Method Result Q LOQ Units Run DL Acetone 67-64-1 8260D ND L 1ug/L5.020 Acrylonitrile 107-13-1 8260D ND 1ug/L0.8020 Benzene 71-43-2 8260D ND 1ug/L0.401.0 Bromochloromethane 74-97-5 8260D ND 1ug/L0.401.0 Bromodichloromethane 75-27-4 8260D ND 1ug/L0.401.0 Bromoform 75-25-2 8260D ND 1ug/L0.401.0 Bromomethane (Methyl bromide)74-83-9 8260D ND 1ug/L0.402.0 2-Butanone (MEK)78-93-3 8260D ND L 1ug/L2.010 Carbon disulfide 75-15-0 8260D ND 1ug/L0.401.0 Carbon tetrachloride 56-23-5 8260D ND 1ug/L0.401.0 Chlorobenzene 108-90-7 8260D ND 1ug/L0.401.0 Chloroethane 75-00-3 8260D ND 1ug/L0.402.0 Chloroform 67-66-3 8260D 0.41 J 1ug/L0.401.0 Chloromethane (Methyl chloride)74-87-3 8260D ND 1ug/L0.501.0 1,2-Dibromo-3-chloropropane (DBCP)96-12-8 8260D ND 1ug/L0.401.0 Dibromochloromethane 124-48-1 8260D ND 1ug/L0.401.0 1,2-Dibromoethane (EDB)106-93-4 8260D ND 1ug/L0.401.0 Dibromomethane (Methylene bromide)74-95-3 8260D ND 1ug/L0.401.0 trans-1,4-Dichloro-2-butene 110-57-6 8260D ND 1ug/L0.502.0 1,2-Dichlorobenzene 95-50-1 8260D ND 1ug/L0.401.0 1,4-Dichlorobenzene 106-46-7 8260D ND 1ug/L0.401.0 1,1-Dichloroethane 75-34-3 8260D ND 1ug/L0.401.0 1,2-Dichloroethane 107-06-2 8260D ND 1ug/L0.401.0 1,1-Dichloroethene 75-35-4 8260D ND 1ug/L0.401.0 cis-1,2-Dichloroethene 156-59-2 8260D ND 1ug/L0.401.0 trans-1,2-Dichloroethene 156-60-5 8260D ND 1ug/L0.401.0 1,2-Dichloropropane 78-87-5 8260D ND 1ug/L0.401.0 cis-1,3-Dichloropropene 10061-01-5 8260D ND 1ug/L0.401.0 trans-1,3-Dichloropropene 10061-02-6 8260D ND 1ug/L0.401.0 1,4-Dioxane 123-91-1 8260D ND L 1ug/L1350 Ethylbenzene 100-41-4 8260D ND 1ug/L0.401.0 2-Hexanone 591-78-6 8260D ND L 1ug/L2.010 Methyl iodide (Iodomethane)74-88-4 8260D ND 1ug/L0.405.0 4-Methyl-2-pentanone 108-10-1 8260D ND 1ug/L2.010 Methylene chloride 75-09-2 8260D 0.53 J 1ug/L0.401.0 Styrene 100-42-5 8260D ND 1ug/L0.411.0 1,1,1,2-Tetrachloroethane 630-20-6 8260D ND 1ug/L0.401.0 1,1,2,2-Tetrachloroethane 79-34-5 8260D ND 1ug/L0.401.0 Tetrachloroethene 127-18-4 8260D ND 1ug/L0.401.0 Toluene 108-88-3 8260D ND 1ug/L0.401.0 1,1,1-Trichloroethane 71-55-6 8260D ND 1ug/L0.401.0 1,1,2-Trichloroethane 79-00-5 8260D ND 1ug/L0.401.0 Trichloroethene 79-01-6 8260D ND 1ug/L0.401.0 Trichlorofluoromethane 75-69-4 8260D ND 1ug/L0.401.0 J = Estimated result < LOQ and > DL_ LOQ = Limit of Quantitation B = Detected in the method blank E = Quantitation of compound exceeded the calibration range P = The RPD between two GC columns exceeds 40%ND = Not detected at or above the DL N = Recovery is out of criteria H = Out of holding time Q = Surrogate failure L = LCS/LCSD failure S = MS/MSD failure DL = Detection Limit W = Reported on wet weight basis 106 Vantage Point Drive West Columbia, SC 29172 (803) 791-9700 Fax (803) 791-9111 www.pacelabs.com Pace Analytical Services, LLC (formerly Shealy Environmental Services, Inc.) Page 35 of 72 Volatile Organic Compounds by GC/MS Description:Matrix: Date Received: Client:Laboratory ID: Date Sampled: Buxton Environmental TW-3 XL28042-009 12/23/2022 1100 12/28/2022 Aqueous Project Name: Gaston Co - Auten Landfill Project Number: NC Permit 3603 Run Prep Method Analytical Method Dilution Analysis Date Analyst Prep Date Batch 1 5030B 8260D 1 01/06/2023 0251 JMM2 64266 AnalyticalCAS Parameter Number Method Result Q LOQ Units Run DL 1,2,3-Trichloropropane 96-18-4 8260D ND 1ug/L0.401.0 Vinyl acetate 108-05-4 8260D ND 1ug/L1.25.0 Vinyl chloride 75-01-4 8260D ND 1ug/L0.401.0 Xylenes (total)1330-20-7 8260D ND 1ug/L0.401.0 AcceptanceRun 1 Surrogate Q % Recovery Limits Bromofluorobenzene 107 70-130 1,2-Dichloroethane-d4 109 70-130 Toluene-d8 111 70-130 J = Estimated result < LOQ and > DL_ LOQ = Limit of Quantitation B = Detected in the method blank E = Quantitation of compound exceeded the calibration range P = The RPD between two GC columns exceeds 40%ND = Not detected at or above the DL N = Recovery is out of criteria H = Out of holding time Q = Surrogate failure L = LCS/LCSD failure S = MS/MSD failure DL = Detection Limit W = Reported on wet weight basis 106 Vantage Point Drive West Columbia, SC 29172 (803) 791-9700 Fax (803) 791-9111 www.pacelabs.com Pace Analytical Services, LLC (formerly Shealy Environmental Services, Inc.) Page 36 of 72 ICP-MS Description:Matrix: Date Received: Client:Laboratory ID: Date Sampled: Buxton Environmental TW-3 XL28042-009 12/23/2022 1100 12/28/2022 Aqueous Project Name: Gaston Co - Auten Landfill Project Number: NC Permit 3603 Run Prep Method Analytical Method Dilution Analysis Date Analyst Prep Date Batch 1 7470A 1 12/29/2022 1431 JAB2 12/29/2022 0950 63783 1 3005A 6020B 1 01/04/2023 2305 BNW 01/03/2023 1029 63790 AnalyticalCAS Parameter Number Method Result Q LOQ Units Run DL Arsenic 7440-38-2 6020B ND 1ug/L1.32.0 Barium 7440-39-3 6020B 89 1ug/L1.35.0 Cadmium 7440-43-9 6020B 1.3 1ug/L0.130.50 Chromium 7440-47-3 6020B 2.3 J 1ug/L1.35.0 Lead 7439-92-1 6020B 3.9 1ug/L0.251.0 Mercury 7439-97-6 7470A ND 1mg/L0.0000910.00020 Selenium 7782-49-2 6020B ND 1ug/L1.35.0 Silver 7440-22-4 6020B ND 1ug/L0.251.0 J = Estimated result < LOQ and > DL_ LOQ = Limit of Quantitation B = Detected in the method blank E = Quantitation of compound exceeded the calibration range P = The RPD between two GC columns exceeds 40%ND = Not detected at or above the DL N = Recovery is out of criteria H = Out of holding time Q = Surrogate failure L = LCS/LCSD failure S = MS/MSD failure DL = Detection Limit W = Reported on wet weight basis 106 Vantage Point Drive West Columbia, SC 29172 (803) 791-9700 Fax (803) 791-9111 www.pacelabs.com Pace Analytical Services, LLC (formerly Shealy Environmental Services, Inc.) Page 37 of 72 Volatile Organic Compounds by GC/MS Description:Matrix: Date Received: Client:Laboratory ID: Date Sampled: Buxton Environmental Upstream XL28042-010 12/26/2022 1630 12/28/2022 Aqueous Project Name: Gaston Co - Auten Landfill Project Number: NC Permit 3603 Run Prep Method Analytical Method Dilution Analysis Date Analyst Prep Date Batch 1 5030B 8260D 1 01/06/2023 0828 JMM2 64265 AnalyticalCAS Parameter Number Method Result Q LOQ Units Run DL Acetone 67-64-1 8260D ND 1ug/L5.020 Acrylonitrile 107-13-1 8260D ND 1ug/L0.8020 Benzene 71-43-2 8260D ND 1ug/L0.401.0 Bromochloromethane 74-97-5 8260D ND 1ug/L0.401.0 Bromodichloromethane 75-27-4 8260D ND 1ug/L0.401.0 Bromoform 75-25-2 8260D ND 1ug/L0.401.0 Bromomethane (Methyl bromide)74-83-9 8260D ND 1ug/L0.402.0 2-Butanone (MEK)78-93-3 8260D ND 1ug/L2.010 Carbon disulfide 75-15-0 8260D ND 1ug/L0.401.0 Carbon tetrachloride 56-23-5 8260D ND 1ug/L0.401.0 Chlorobenzene 108-90-7 8260D ND 1ug/L0.401.0 Chloroethane 75-00-3 8260D ND 1ug/L0.402.0 Chloroform 67-66-3 8260D ND 1ug/L0.401.0 Chloromethane (Methyl chloride)74-87-3 8260D ND 1ug/L0.501.0 1,2-Dibromo-3-chloropropane (DBCP)96-12-8 8260D ND 1ug/L0.401.0 Dibromochloromethane 124-48-1 8260D ND 1ug/L0.401.0 1,2-Dibromoethane (EDB)106-93-4 8260D ND 1ug/L0.401.0 Dibromomethane (Methylene bromide)74-95-3 8260D ND 1ug/L0.401.0 trans-1,4-Dichloro-2-butene 110-57-6 8260D ND 1ug/L0.502.0 1,2-Dichlorobenzene 95-50-1 8260D ND 1ug/L0.401.0 1,4-Dichlorobenzene 106-46-7 8260D ND 1ug/L0.401.0 1,1-Dichloroethane 75-34-3 8260D ND 1ug/L0.401.0 1,2-Dichloroethane 107-06-2 8260D ND 1ug/L0.401.0 1,1-Dichloroethene 75-35-4 8260D ND 1ug/L0.401.0 cis-1,2-Dichloroethene 156-59-2 8260D ND 1ug/L0.401.0 trans-1,2-Dichloroethene 156-60-5 8260D ND 1ug/L0.401.0 1,2-Dichloropropane 78-87-5 8260D ND 1ug/L0.401.0 cis-1,3-Dichloropropene 10061-01-5 8260D ND 1ug/L0.401.0 trans-1,3-Dichloropropene 10061-02-6 8260D ND 1ug/L0.401.0 1,4-Dioxane 123-91-1 8260D ND 1ug/L1350 Ethylbenzene 100-41-4 8260D ND 1ug/L0.401.0 2-Hexanone 591-78-6 8260D ND 1ug/L2.010 Methyl iodide (Iodomethane)74-88-4 8260D ND 1ug/L0.405.0 4-Methyl-2-pentanone 108-10-1 8260D ND 1ug/L2.010 Methylene chloride 75-09-2 8260D ND 1ug/L0.401.0 Styrene 100-42-5 8260D ND 1ug/L0.411.0 1,1,1,2-Tetrachloroethane 630-20-6 8260D ND 1ug/L0.401.0 1,1,2,2-Tetrachloroethane 79-34-5 8260D ND 1ug/L0.401.0 Tetrachloroethene 127-18-4 8260D ND 1ug/L0.401.0 Toluene 108-88-3 8260D ND 1ug/L0.401.0 1,1,1-Trichloroethane 71-55-6 8260D ND 1ug/L0.401.0 1,1,2-Trichloroethane 79-00-5 8260D ND 1ug/L0.401.0 Trichloroethene 79-01-6 8260D ND 1ug/L0.401.0 Trichlorofluoromethane 75-69-4 8260D ND 1ug/L0.401.0 J = Estimated result < LOQ and > DL_ LOQ = Limit of Quantitation B = Detected in the method blank E = Quantitation of compound exceeded the calibration range P = The RPD between two GC columns exceeds 40%ND = Not detected at or above the DL N = Recovery is out of criteria H = Out of holding time Q = Surrogate failure L = LCS/LCSD failure S = MS/MSD failure DL = Detection Limit W = Reported on wet weight basis 106 Vantage Point Drive West Columbia, SC 29172 (803) 791-9700 Fax (803) 791-9111 www.pacelabs.com Pace Analytical Services, LLC (formerly Shealy Environmental Services, Inc.) Page 38 of 72 Volatile Organic Compounds by GC/MS Description:Matrix: Date Received: Client:Laboratory ID: Date Sampled: Buxton Environmental Upstream XL28042-010 12/26/2022 1630 12/28/2022 Aqueous Project Name: Gaston Co - Auten Landfill Project Number: NC Permit 3603 Run Prep Method Analytical Method Dilution Analysis Date Analyst Prep Date Batch 1 5030B 8260D 1 01/06/2023 0828 JMM2 64265 AnalyticalCAS Parameter Number Method Result Q LOQ Units Run DL 1,2,3-Trichloropropane 96-18-4 8260D ND 1ug/L0.401.0 Vinyl acetate 108-05-4 8260D ND 1ug/L1.25.0 Vinyl chloride 75-01-4 8260D ND 1ug/L0.401.0 Xylenes (total)1330-20-7 8260D ND 1ug/L0.401.0 AcceptanceRun 1 Surrogate Q % Recovery Limits Bromofluorobenzene 89 70-130 1,2-Dichloroethane-d4 90 70-130 Toluene-d8 92 70-130 J = Estimated result < LOQ and > DL_ LOQ = Limit of Quantitation B = Detected in the method blank E = Quantitation of compound exceeded the calibration range P = The RPD between two GC columns exceeds 40%ND = Not detected at or above the DL N = Recovery is out of criteria H = Out of holding time Q = Surrogate failure L = LCS/LCSD failure S = MS/MSD failure DL = Detection Limit W = Reported on wet weight basis 106 Vantage Point Drive West Columbia, SC 29172 (803) 791-9700 Fax (803) 791-9111 www.pacelabs.com Pace Analytical Services, LLC (formerly Shealy Environmental Services, Inc.) Page 39 of 72 Volatile Organic Compounds by GC/MS (SIM) Description:Matrix: Date Received: Client:Laboratory ID: Date Sampled: Buxton Environmental Upstream XL28042-010 12/26/2022 1630 12/28/2022 Aqueous Project Name: Gaston Co - Auten Landfill Project Number: NC Permit 3603 Run Prep Method Analytical Method Dilution Analysis Date Analyst Prep Date Batch 1 5030B 8260D (SIM)1 01/04/2023 2018 BLM 64133 AnalyticalCAS Parameter Number Method Result Q LOQ Units Run DL 1,4-Dioxane 123-91-1 8260D (SIM)ND 1ug/L1.03.0 AcceptanceRun 1 Surrogate Q % Recovery Limits 1,2-Dichloroethane-d4 93 40-170 J = Estimated result < LOQ and > DL_ LOQ = Limit of Quantitation B = Detected in the method blank E = Quantitation of compound exceeded the calibration range P = The RPD between two GC columns exceeds 40%ND = Not detected at or above the DL N = Recovery is out of criteria H = Out of holding time Q = Surrogate failure L = LCS/LCSD failure S = MS/MSD failure DL = Detection Limit W = Reported on wet weight basis 106 Vantage Point Drive West Columbia, SC 29172 (803) 791-9700 Fax (803) 791-9111 www.pacelabs.com Pace Analytical Services, LLC (formerly Shealy Environmental Services, Inc.) Page 40 of 72 ICP-MS Description:Matrix: Date Received: Client:Laboratory ID: Date Sampled: Buxton Environmental Upstream XL28042-010 12/26/2022 1630 12/28/2022 Aqueous Project Name: Gaston Co - Auten Landfill Project Number: NC Permit 3603 Run Prep Method Analytical Method Dilution Analysis Date Analyst Prep Date Batch 1 7470A 1 12/29/2022 1434 JAB2 12/29/2022 0950 63783 1 3005A 6020B 1 01/04/2023 2315 BNW 01/03/2023 1029 63790 AnalyticalCAS Parameter Number Method Result Q LOQ Units Run DL Arsenic 7440-38-2 6020B ND 1ug/L1.32.0 Barium 7440-39-3 6020B 52 1ug/L1.35.0 Cadmium 7440-43-9 6020B ND 1ug/L0.130.50 Chromium 7440-47-3 6020B 48 1ug/L1.35.0 Lead 7439-92-1 6020B ND 1ug/L0.251.0 Mercury 7439-97-6 7470A ND 1mg/L0.0000910.00020 Selenium 7782-49-2 6020B ND 1ug/L1.35.0 Silver 7440-22-4 6020B ND 1ug/L0.251.0 J = Estimated result < LOQ and > DL_ LOQ = Limit of Quantitation B = Detected in the method blank E = Quantitation of compound exceeded the calibration range P = The RPD between two GC columns exceeds 40%ND = Not detected at or above the DL N = Recovery is out of criteria H = Out of holding time Q = Surrogate failure L = LCS/LCSD failure S = MS/MSD failure DL = Detection Limit W = Reported on wet weight basis 106 Vantage Point Drive West Columbia, SC 29172 (803) 791-9700 Fax (803) 791-9111 www.pacelabs.com Pace Analytical Services, LLC (formerly Shealy Environmental Services, Inc.) Page 41 of 72 Volatile Organic Compounds by GC/MS Description:Matrix: Date Received: Client:Laboratory ID: Date Sampled: Buxton Environmental Downstream XL28042-011 12/26/2022 1400 12/28/2022 Aqueous Project Name: Gaston Co - Auten Landfill Project Number: NC Permit 3603 Run Prep Method Analytical Method Dilution Analysis Date Analyst Prep Date Batch 1 5030B 8260D 1 01/06/2023 0853 JMM2 64265 AnalyticalCAS Parameter Number Method Result Q LOQ Units Run DL Acetone 67-64-1 8260D ND 1ug/L5.020 Acrylonitrile 107-13-1 8260D ND 1ug/L0.8020 Benzene 71-43-2 8260D ND 1ug/L0.401.0 Bromochloromethane 74-97-5 8260D ND 1ug/L0.401.0 Bromodichloromethane 75-27-4 8260D ND 1ug/L0.401.0 Bromoform 75-25-2 8260D ND 1ug/L0.401.0 Bromomethane (Methyl bromide)74-83-9 8260D ND 1ug/L0.402.0 2-Butanone (MEK)78-93-3 8260D ND 1ug/L2.010 Carbon disulfide 75-15-0 8260D ND 1ug/L0.401.0 Carbon tetrachloride 56-23-5 8260D ND 1ug/L0.401.0 Chlorobenzene 108-90-7 8260D ND 1ug/L0.401.0 Chloroethane 75-00-3 8260D ND 1ug/L0.402.0 Chloroform 67-66-3 8260D ND 1ug/L0.401.0 Chloromethane (Methyl chloride)74-87-3 8260D ND 1ug/L0.501.0 1,2-Dibromo-3-chloropropane (DBCP)96-12-8 8260D ND 1ug/L0.401.0 Dibromochloromethane 124-48-1 8260D ND 1ug/L0.401.0 1,2-Dibromoethane (EDB)106-93-4 8260D ND 1ug/L0.401.0 Dibromomethane (Methylene bromide)74-95-3 8260D ND 1ug/L0.401.0 trans-1,4-Dichloro-2-butene 110-57-6 8260D ND 1ug/L0.502.0 1,2-Dichlorobenzene 95-50-1 8260D ND 1ug/L0.401.0 1,4-Dichlorobenzene 106-46-7 8260D ND 1ug/L0.401.0 1,1-Dichloroethane 75-34-3 8260D ND 1ug/L0.401.0 1,2-Dichloroethane 107-06-2 8260D ND 1ug/L0.401.0 1,1-Dichloroethene 75-35-4 8260D ND 1ug/L0.401.0 cis-1,2-Dichloroethene 156-59-2 8260D ND 1ug/L0.401.0 trans-1,2-Dichloroethene 156-60-5 8260D ND 1ug/L0.401.0 1,2-Dichloropropane 78-87-5 8260D ND 1ug/L0.401.0 cis-1,3-Dichloropropene 10061-01-5 8260D ND 1ug/L0.401.0 trans-1,3-Dichloropropene 10061-02-6 8260D ND 1ug/L0.401.0 1,4-Dioxane 123-91-1 8260D ND 1ug/L1350 Ethylbenzene 100-41-4 8260D ND 1ug/L0.401.0 2-Hexanone 591-78-6 8260D ND 1ug/L2.010 Methyl iodide (Iodomethane)74-88-4 8260D ND 1ug/L0.405.0 4-Methyl-2-pentanone 108-10-1 8260D ND 1ug/L2.010 Methylene chloride 75-09-2 8260D ND 1ug/L0.401.0 Styrene 100-42-5 8260D ND 1ug/L0.411.0 1,1,1,2-Tetrachloroethane 630-20-6 8260D ND 1ug/L0.401.0 1,1,2,2-Tetrachloroethane 79-34-5 8260D ND 1ug/L0.401.0 Tetrachloroethene 127-18-4 8260D ND 1ug/L0.401.0 Toluene 108-88-3 8260D ND 1ug/L0.401.0 1,1,1-Trichloroethane 71-55-6 8260D ND 1ug/L0.401.0 1,1,2-Trichloroethane 79-00-5 8260D ND 1ug/L0.401.0 Trichloroethene 79-01-6 8260D ND 1ug/L0.401.0 Trichlorofluoromethane 75-69-4 8260D ND 1ug/L0.401.0 J = Estimated result < LOQ and > DL_ LOQ = Limit of Quantitation B = Detected in the method blank E = Quantitation of compound exceeded the calibration range P = The RPD between two GC columns exceeds 40%ND = Not detected at or above the DL N = Recovery is out of criteria H = Out of holding time Q = Surrogate failure L = LCS/LCSD failure S = MS/MSD failure DL = Detection Limit W = Reported on wet weight basis 106 Vantage Point Drive West Columbia, SC 29172 (803) 791-9700 Fax (803) 791-9111 www.pacelabs.com Pace Analytical Services, LLC (formerly Shealy Environmental Services, Inc.) Page 42 of 72 Volatile Organic Compounds by GC/MS Description:Matrix: Date Received: Client:Laboratory ID: Date Sampled: Buxton Environmental Downstream XL28042-011 12/26/2022 1400 12/28/2022 Aqueous Project Name: Gaston Co - Auten Landfill Project Number: NC Permit 3603 Run Prep Method Analytical Method Dilution Analysis Date Analyst Prep Date Batch 1 5030B 8260D 1 01/06/2023 0853 JMM2 64265 AnalyticalCAS Parameter Number Method Result Q LOQ Units Run DL 1,2,3-Trichloropropane 96-18-4 8260D ND 1ug/L0.401.0 Vinyl acetate 108-05-4 8260D ND 1ug/L1.25.0 Vinyl chloride 75-01-4 8260D ND 1ug/L0.401.0 Xylenes (total)1330-20-7 8260D ND 1ug/L0.401.0 AcceptanceRun 1 Surrogate Q % Recovery Limits Bromofluorobenzene 86 70-130 1,2-Dichloroethane-d4 85 70-130 Toluene-d8 91 70-130 J = Estimated result < LOQ and > DL_ LOQ = Limit of Quantitation B = Detected in the method blank E = Quantitation of compound exceeded the calibration range P = The RPD between two GC columns exceeds 40%ND = Not detected at or above the DL N = Recovery is out of criteria H = Out of holding time Q = Surrogate failure L = LCS/LCSD failure S = MS/MSD failure DL = Detection Limit W = Reported on wet weight basis 106 Vantage Point Drive West Columbia, SC 29172 (803) 791-9700 Fax (803) 791-9111 www.pacelabs.com Pace Analytical Services, LLC (formerly Shealy Environmental Services, Inc.) Page 43 of 72 Volatile Organic Compounds by GC/MS (SIM) Description:Matrix: Date Received: Client:Laboratory ID: Date Sampled: Buxton Environmental Downstream XL28042-011 12/26/2022 1400 12/28/2022 Aqueous Project Name: Gaston Co - Auten Landfill Project Number: NC Permit 3603 Run Prep Method Analytical Method Dilution Analysis Date Analyst Prep Date Batch 1 5030B 8260D (SIM)1 01/04/2023 2042 BLM 64133 AnalyticalCAS Parameter Number Method Result Q LOQ Units Run DL 1,4-Dioxane 123-91-1 8260D (SIM)4.4 1ug/L1.03.0 AcceptanceRun 1 Surrogate Q % Recovery Limits 1,2-Dichloroethane-d4 92 40-170 J = Estimated result < LOQ and > DL_ LOQ = Limit of Quantitation B = Detected in the method blank E = Quantitation of compound exceeded the calibration range P = The RPD between two GC columns exceeds 40%ND = Not detected at or above the DL N = Recovery is out of criteria H = Out of holding time Q = Surrogate failure L = LCS/LCSD failure S = MS/MSD failure DL = Detection Limit W = Reported on wet weight basis 106 Vantage Point Drive West Columbia, SC 29172 (803) 791-9700 Fax (803) 791-9111 www.pacelabs.com Pace Analytical Services, LLC (formerly Shealy Environmental Services, Inc.) Page 44 of 72 ICP-MS Description:Matrix: Date Received: Client:Laboratory ID: Date Sampled: Buxton Environmental Downstream XL28042-011 12/26/2022 1400 12/28/2022 Aqueous Project Name: Gaston Co - Auten Landfill Project Number: NC Permit 3603 Run Prep Method Analytical Method Dilution Analysis Date Analyst Prep Date Batch 1 7470A 1 12/29/2022 1437 JAB2 12/29/2022 0950 63783 1 3005A 6020B 1 01/04/2023 2326 BNW 01/03/2023 1029 63790 AnalyticalCAS Parameter Number Method Result Q LOQ Units Run DL Arsenic 7440-38-2 6020B ND 1ug/L1.32.0 Barium 7440-39-3 6020B 27 1ug/L1.35.0 Cadmium 7440-43-9 6020B ND 1ug/L0.130.50 Chromium 7440-47-3 6020B 11 1ug/L1.35.0 Lead 7439-92-1 6020B 0.60 J 1ug/L0.251.0 Mercury 7439-97-6 7470A ND 1mg/L0.0000910.00020 Selenium 7782-49-2 6020B ND 1ug/L1.35.0 Silver 7440-22-4 6020B ND 1ug/L0.251.0 J = Estimated result < LOQ and > DL_ LOQ = Limit of Quantitation B = Detected in the method blank E = Quantitation of compound exceeded the calibration range P = The RPD between two GC columns exceeds 40%ND = Not detected at or above the DL N = Recovery is out of criteria H = Out of holding time Q = Surrogate failure L = LCS/LCSD failure S = MS/MSD failure DL = Detection Limit W = Reported on wet weight basis 106 Vantage Point Drive West Columbia, SC 29172 (803) 791-9700 Fax (803) 791-9111 www.pacelabs.com Pace Analytical Services, LLC (formerly Shealy Environmental Services, Inc.) Page 45 of 72 QC Summary 106 Vantage Point Drive West Columbia, SC 29172 (803) 791-9700 Fax (803) 791-9111 www.pacelabs.com Pace Analytical Services, LLC (formerly Shealy Environmental Services, Inc.) Page 46 of 72 Volatile Organic Compounds by GC/MS (SIM) - MB Batch:Prep Method: Sample ID:YQ64133-001 64133 5030B Analytical Method:8260D (SIM) Matrix:Aqueous Parameter Result Q LOQ DL Units Analysis DateDil 1,4-Dioxane ND 01/04/2023 14113.0 1.0 ug/L1 Surrogate Q % Rec Acceptance Limit 1,2-Dichloroethane-d4 95 40-170 Note:Calculations are performed before rounding to avoid round-off errors in calculated results LOQ = Limit of Quantitation ND = Not detected at or above the DL J = Estimated result < LOQ and > DL N = Recovery is out of criteria P = The RPD between two GC columns exceeds 40% + = RPD is out of criteria _DL = Detection Limit * = RSD is out of criteria 106 Vantage Point Drive West Columbia, SC 29172 (803) 791-9700 Fax (803) 791-9111 www.pacelabs.com Pace Analytical Services, LLC (formerly Shealy Environmental Services, Inc.) Page 47 of 72 Volatile Organic Compounds by GC/MS (SIM) - LCS Batch:Prep Method: Sample ID:YQ64133-002 64133 5030B Analytical Method:8260D (SIM) Matrix:Aqueous Parameter Result Q % Rec Spike Amount Analysis Date %Rec LimitDil(ug/L)(ug/L) 1,4-Dioxane 48 01/04/2023 1257975070-1301 Surrogate Q % Rec Acceptance Limit 1,2-Dichloroethane-d4 106 40-170 Note:Calculations are performed before rounding to avoid round-off errors in calculated results LOQ = Limit of Quantitation ND = Not detected at or above the DL J = Estimated result < LOQ and > DL N = Recovery is out of criteria P = The RPD between two GC columns exceeds 40% + = RPD is out of criteria _DL = Detection Limit * = RSD is out of criteria 106 Vantage Point Drive West Columbia, SC 29172 (803) 791-9700 Fax (803) 791-9111 www.pacelabs.com Pace Analytical Services, LLC (formerly Shealy Environmental Services, Inc.) Page 48 of 72 Volatile Organic Compounds by GC/MS - MB Batch:Prep Method: Sample ID:YQ64265-001 64265 5030B Analytical Method:8260D Matrix:Aqueous Parameter Result Q LOQ DL Units Analysis DateDil Acetone ND 01/05/2023 2305205.0 ug/L1 Acrylonitrile ND 01/05/2023 2305200.80 ug/L1 Benzene ND 01/05/2023 23051.0 0.40 ug/L1 Bromochloromethane ND 01/05/2023 23051.0 0.40 ug/L1 Bromodichloromethane ND 01/05/2023 23051.0 0.40 ug/L1 Bromoform ND 01/05/2023 23051.0 0.40 ug/L1 Bromomethane (Methyl bromide)ND 01/05/2023 23052.0 0.40 ug/L1 2-Butanone (MEK)ND 01/05/2023 2305102.0 ug/L1 Carbon disulfide ND 01/05/2023 23051.0 0.40 ug/L1 Carbon tetrachloride ND 01/05/2023 23051.0 0.40 ug/L1 Chlorobenzene ND 01/05/2023 23051.0 0.40 ug/L1 Chloroethane ND 01/05/2023 23052.0 0.40 ug/L1 Chloroform ND 01/05/2023 23051.0 0.40 ug/L1 Chloromethane (Methyl chloride)ND 01/05/2023 23051.0 0.50 ug/L1 1,2-Dibromo-3-chloropropane (DBCP)ND 01/05/2023 23051.0 0.40 ug/L1 Dibromochloromethane ND 01/05/2023 23051.0 0.40 ug/L1 1,2-Dibromoethane (EDB)ND 01/05/2023 23051.0 0.40 ug/L1 Dibromomethane (Methylene bromide)ND 01/05/2023 23051.0 0.40 ug/L1 trans-1,4-Dichloro-2-butene ND 01/05/2023 23052.0 0.50 ug/L1 1,2-Dichlorobenzene ND 01/05/2023 23051.0 0.40 ug/L1 1,4-Dichlorobenzene ND 01/05/2023 23051.0 0.40 ug/L1 1,1-Dichloroethane ND 01/05/2023 23051.0 0.40 ug/L1 1,2-Dichloroethane ND 01/05/2023 23051.0 0.40 ug/L1 1,1-Dichloroethene ND 01/05/2023 23051.0 0.40 ug/L1 cis-1,2-Dichloroethene ND 01/05/2023 23051.0 0.40 ug/L1 trans-1,2-Dichloroethene ND 01/05/2023 23051.0 0.40 ug/L1 1,2-Dichloropropane ND 01/05/2023 23051.0 0.40 ug/L1 cis-1,3-Dichloropropene ND 01/05/2023 23051.0 0.40 ug/L1 trans-1,3-Dichloropropene ND 01/05/2023 23051.0 0.40 ug/L1 1,4-Dioxane ND 01/05/2023 23055013ug/L1 Ethylbenzene ND 01/05/2023 23051.0 0.40 ug/L1 2-Hexanone ND 01/05/2023 2305102.0 ug/L1 Methyl iodide (Iodomethane)ND 01/05/2023 23055.0 0.40 ug/L1 4-Methyl-2-pentanone ND 01/05/2023 2305102.0 ug/L1 Methylene chloride ND 01/05/2023 23051.0 0.40 ug/L1 Styrene ND 01/05/2023 23051.0 0.41 ug/L1 1,1,1,2-Tetrachloroethane ND 01/05/2023 23051.0 0.40 ug/L1 1,1,2,2-Tetrachloroethane ND 01/05/2023 23051.0 0.40 ug/L1 Tetrachloroethene ND 01/05/2023 23051.0 0.40 ug/L1 Toluene ND 01/05/2023 23051.0 0.40 ug/L1 1,1,1-Trichloroethane ND 01/05/2023 23051.0 0.40 ug/L1 1,1,2-Trichloroethane ND 01/05/2023 23051.0 0.40 ug/L1 Trichloroethene ND 01/05/2023 23051.0 0.40 ug/L1 Trichlorofluoromethane ND 01/05/2023 23051.0 0.40 ug/L1 Note:Calculations are performed before rounding to avoid round-off errors in calculated results LOQ = Limit of Quantitation ND = Not detected at or above the DL J = Estimated result < LOQ and > DL N = Recovery is out of criteria P = The RPD between two GC columns exceeds 40% + = RPD is out of criteria _DL = Detection Limit * = RSD is out of criteria 106 Vantage Point Drive West Columbia, SC 29172 (803) 791-9700 Fax (803) 791-9111 www.pacelabs.com Pace Analytical Services, LLC (formerly Shealy Environmental Services, Inc.) Page 49 of 72 Volatile Organic Compounds by GC/MS - MB Batch:Prep Method: Sample ID:YQ64265-001 64265 5030B Analytical Method:8260D Matrix:Aqueous Parameter Result Q LOQ DL Units Analysis DateDil 1,2,3-Trichloropropane ND 01/05/2023 23051.0 0.40 ug/L1 Vinyl acetate ND 01/05/2023 23055.0 1.2 ug/L1 Vinyl chloride ND 01/05/2023 23051.0 0.40 ug/L1 Xylenes (total)ND 01/05/2023 23051.0 0.40 ug/L1 Surrogate Q % Rec Acceptance Limit Bromofluorobenzene 94 70-130 1,2-Dichloroethane-d4 95 70-130 Toluene-d8 96 70-130 Note:Calculations are performed before rounding to avoid round-off errors in calculated results LOQ = Limit of Quantitation ND = Not detected at or above the DL J = Estimated result < LOQ and > DL N = Recovery is out of criteria P = The RPD between two GC columns exceeds 40% + = RPD is out of criteria _DL = Detection Limit * = RSD is out of criteria 106 Vantage Point Drive West Columbia, SC 29172 (803) 791-9700 Fax (803) 791-9111 www.pacelabs.com Pace Analytical Services, LLC (formerly Shealy Environmental Services, Inc.) Page 50 of 72 Volatile Organic Compounds by GC/MS - LCS Batch:Prep Method: Sample ID:YQ64265-002 64265 5030B Analytical Method:8260D Matrix:Aqueous Parameter Result Q % Rec Spike Amount Analysis Date %Rec LimitDil(ug/L)(ug/L) Acetone 130 01/05/2023 215513010060-1401 Acrylonitrile 90 01/05/2023 21559010070-1301 Benzene 49 01/05/2023 2155995070-1301 Bromochloromethane 48 01/05/2023 2155965070-1301 Bromodichloromethane 49 01/05/2023 2155995070-1301 Bromoform 42 01/05/2023 2155845070-1301 Bromomethane (Methyl bromide)55 01/05/2023 21551105070-1301 2-Butanone (MEK)99 01/05/2023 21559910070-1301 Carbon disulfide 49 01/05/2023 2155995070-1301 Carbon tetrachloride 47 01/05/2023 2155935070-1301 Chlorobenzene 50 01/05/2023 21551005070-1301 Chloroethane 52 01/05/2023 21551055070-1301 Chloroform 44 01/05/2023 2155885070-1301 Chloromethane (Methyl chloride)56 01/05/2023 21551115060-1401 1,2-Dibromo-3-chloropropane (DBCP)48 01/05/2023 2155955070-1301 Dibromochloromethane 51 01/05/2023 21551015070-1301 1,2-Dibromoethane (EDB)51 01/05/2023 21551025070-1301 Dibromomethane (Methylene bromide)50 01/05/2023 21551005070-1301 trans-1,4-Dichloro-2-butene 41 01/05/2023 2155825070-1301 1,2-Dichlorobenzene 52 01/05/2023 21551045070-1301 1,4-Dichlorobenzene 50 01/05/2023 2155995070-1301 1,1-Dichloroethane 45 01/05/2023 2155905070-1301 1,2-Dichloroethane 50 01/05/2023 21551005070-1301 1,1-Dichloroethene 49 01/05/2023 2155985070-1301 cis-1,2-Dichloroethene 45 01/05/2023 2155905070-1301 trans-1,2-Dichloroethene 46 01/05/2023 2155925070-1301 1,2-Dichloropropane 48 01/05/2023 2155975070-1301 cis-1,3-Dichloropropene 51 01/05/2023 21551015070-1301 trans-1,3-Dichloropropene 51 01/05/2023 21551035070-1301 1,4-Dioxane 440 01/05/2023 21558750060-1401 Ethylbenzene 53 01/05/2023 21551065070-1301 2-Hexanone 100 01/05/2023 215510410070-1301 Methyl iodide (Iodomethane)52 01/05/2023 21551055070-1301 4-Methyl-2-pentanone 99 01/05/2023 21559910070-1301 Methylene chloride 47 01/05/2023 2155955070-1301 Styrene 50 01/05/2023 21551005070-1301 1,1,1,2-Tetrachloroethane 52 01/05/2023 21551045070-1301 1,1,2,2-Tetrachloroethane 49 01/05/2023 2155985070-1301 Tetrachloroethene 50 01/05/2023 21551015070-1301 Toluene 51 01/05/2023 21551025070-1301 1,1,1-Trichloroethane 48 01/05/2023 2155965070-1301 1,1,2-Trichloroethane 52 01/05/2023 21551045070-1301 Trichloroethene 52 01/05/2023 21551055070-1301 Trichlorofluoromethane 54 01/05/2023 21551095070-1301 Note:Calculations are performed before rounding to avoid round-off errors in calculated results LOQ = Limit of Quantitation ND = Not detected at or above the DL J = Estimated result < LOQ and > DL N = Recovery is out of criteria P = The RPD between two GC columns exceeds 40% + = RPD is out of criteria _DL = Detection Limit * = RSD is out of criteria 106 Vantage Point Drive West Columbia, SC 29172 (803) 791-9700 Fax (803) 791-9111 www.pacelabs.com Pace Analytical Services, LLC (formerly Shealy Environmental Services, Inc.) Page 51 of 72 Volatile Organic Compounds by GC/MS - LCS Batch:Prep Method: Sample ID:YQ64265-002 64265 5030B Analytical Method:8260D Matrix:Aqueous Parameter Result Q % Rec Spike Amount Analysis Date %Rec LimitDil(ug/L)(ug/L) 1,2,3-Trichloropropane 48 01/05/2023 2155965070-1301 Vinyl acetate 38 01/05/2023 2155755060-1401 Vinyl chloride 52 01/05/2023 21551055070-1301 Xylenes (total)100 01/05/2023 215510110070-1301 Surrogate Q % Rec Acceptance Limit Bromofluorobenzene 94 70-130 1,2-Dichloroethane-d4 90 70-130 Toluene-d8 92 70-130 Note:Calculations are performed before rounding to avoid round-off errors in calculated results LOQ = Limit of Quantitation ND = Not detected at or above the DL J = Estimated result < LOQ and > DL N = Recovery is out of criteria P = The RPD between two GC columns exceeds 40% + = RPD is out of criteria _DL = Detection Limit * = RSD is out of criteria 106 Vantage Point Drive West Columbia, SC 29172 (803) 791-9700 Fax (803) 791-9111 www.pacelabs.com Pace Analytical Services, LLC (formerly Shealy Environmental Services, Inc.) Page 52 of 72 Volatile Organic Compounds by GC/MS - LCSD Batch:Prep Method: Sample ID:YQ64265-003 64265 5030B Analytical Method:8260D Matrix:Aqueous Parameter Result Q % Rec Spike Amount Analysis Date% RPD %Rec Limit % RPD LimitDil(ug/L)(ug/L) Acetone 110 01/06/2023 013111310060-14014 201 Acrylonitrile 79 01/06/2023 01317910070-13013 201 Benzene 48 01/06/2023 0131975070-1301.9 201 Bromochloromethane 45 01/06/2023 0131895070-1307.3 201 Bromodichloromethane 48 01/06/2023 0131965070-1303.4 201 Bromoform 43 01/06/2023 0131855070-1301.9 201 Bromomethane (Methyl bromide)57 01/06/2023 01311145070-1303.8 201 2-Butanone (MEK)92 01/06/2023 01319210070-1307.6 201 Carbon disulfide 44 01/06/2023 0131895070-13011 201 Carbon tetrachloride 43 01/06/2023 0131875070-1307.4 201 Chlorobenzene 50 01/06/2023 0131995070-1300.69 201 Chloroethane 53 01/06/2023 01311055070-1300.26 201 Chloroform 42 01/06/2023 0131845070-1303.7 201 Chloromethane (Methyl chloride)58 01/06/2023 01311175060-1404.4 201 1,2-Dibromo-3-chloropropane (DBCP)47 01/06/2023 0131945070-1301.6 201 Dibromochloromethane 51 01/06/2023 01311015070-1300.16 201 1,2-Dibromoethane (EDB)51 01/06/2023 01311025070-1300.28 201 Dibromomethane (Methylene bromide)49 01/06/2023 0131975070-1303.4 201 trans-1,4-Dichloro-2-butene 41 01/06/2023 0131835070-1300.82 201 1,2-Dichlorobenzene 52 01/06/2023 01311045070-1300.062 201 1,4-Dichlorobenzene 49 01/06/2023 0131995070-1300.82 201 1,1-Dichloroethane 43 01/06/2023 0131865070-1304.5 201 1,2-Dichloroethane 48 01/06/2023 0131975070-1303.1 201 1,1-Dichloroethene 43 01/06/2023 0131865070-13014 201 cis-1,2-Dichloroethene 43 01/06/2023 0131875070-1304.1 201 trans-1,2-Dichloroethene 43 01/06/2023 0131865070-1306.8 201 1,2-Dichloropropane 47 01/06/2023 0131935070-1303.8 201 cis-1,3-Dichloropropene 49 01/06/2023 0131985070-1303.6 201 trans-1,3-Dichloropropene 51 01/06/2023 01311015070-1301.6 201 1,4-Dioxane 350 01/06/2023 0131+70500 60-14021 201 Ethylbenzene 52 01/06/2023 01311035070-1302.7 201 2-Hexanone 100 01/06/2023 013110310070-1300.53 201 Methyl iodide (Iodomethane)47 01/06/2023 0131955070-13010 201 4-Methyl-2-pentanone 93 01/06/2023 01319310070-1305.8 201 Methylene chloride 43 01/06/2023 0131855070-13010 201 Styrene 50 01/06/2023 01311005070-1300.15 201 1,1,1,2-Tetrachloroethane 51 01/06/2023 01311025070-1301.4 201 1,1,2,2-Tetrachloroethane 49 01/06/2023 0131975070-1300.48 201 Tetrachloroethene 49 01/06/2023 0131985070-1303.3 201 Toluene 50 01/06/2023 01311005070-1301.5 201 1,1,1-Trichloroethane 43 01/06/2023 0131855070-13012 201 1,1,2-Trichloroethane 52 01/06/2023 01311055070-1300.13 201 Trichloroethene 50 01/06/2023 01311005070-1304.4 201 Trichlorofluoromethane 51 01/06/2023 01311015070-1306.9 201 Note:Calculations are performed before rounding to avoid round-off errors in calculated results LOQ = Limit of Quantitation ND = Not detected at or above the DL J = Estimated result < LOQ and > DL N = Recovery is out of criteria P = The RPD between two GC columns exceeds 40% + = RPD is out of criteria _DL = Detection Limit * = RSD is out of criteria 106 Vantage Point Drive West Columbia, SC 29172 (803) 791-9700 Fax (803) 791-9111 www.pacelabs.com Pace Analytical Services, LLC (formerly Shealy Environmental Services, Inc.) Page 53 of 72 Volatile Organic Compounds by GC/MS - LCSD Batch:Prep Method: Sample ID:YQ64265-003 64265 5030B Analytical Method:8260D Matrix:Aqueous Parameter Result Q % Rec Spike Amount Analysis Date% RPD %Rec Limit % RPD LimitDil(ug/L)(ug/L) 1,2,3-Trichloropropane 49 01/06/2023 0131985070-1302.1 201 Vinyl acetate 37 01/06/2023 0131745060-1401.0 201 Vinyl chloride 53 01/06/2023 01311075070-1301.6 201 Xylenes (total)100 01/06/2023 013110110070-1300.29 201 Surrogate Q % Rec Acceptance Limit Bromofluorobenzene 93 70-130 1,2-Dichloroethane-d4 93 70-130 Toluene-d8 93 70-130 Note:Calculations are performed before rounding to avoid round-off errors in calculated results LOQ = Limit of Quantitation ND = Not detected at or above the DL J = Estimated result < LOQ and > DL N = Recovery is out of criteria P = The RPD between two GC columns exceeds 40% + = RPD is out of criteria _DL = Detection Limit * = RSD is out of criteria 106 Vantage Point Drive West Columbia, SC 29172 (803) 791-9700 Fax (803) 791-9111 www.pacelabs.com Pace Analytical Services, LLC (formerly Shealy Environmental Services, Inc.) Page 54 of 72 Volatile Organic Compounds by GC/MS - MB Batch:Prep Method: Sample ID:YQ64266-001 64266 5030B Analytical Method:8260D Matrix:Aqueous Parameter Result Q LOQ DL Units Analysis DateDil Acetone ND 01/06/2023 0022205.0 ug/L1 Acrylonitrile ND 01/06/2023 0022200.80 ug/L1 Benzene ND 01/06/2023 00221.0 0.40 ug/L1 Bromochloromethane ND 01/06/2023 00221.0 0.40 ug/L1 Bromodichloromethane ND 01/06/2023 00221.0 0.40 ug/L1 Bromoform ND 01/06/2023 00221.0 0.40 ug/L1 Bromomethane (Methyl bromide)ND 01/06/2023 00222.0 0.40 ug/L1 2-Butanone (MEK)ND 01/06/2023 0022102.0 ug/L1 Carbon disulfide ND 01/06/2023 00221.0 0.40 ug/L1 Carbon tetrachloride ND 01/06/2023 00221.0 0.40 ug/L1 Chlorobenzene ND 01/06/2023 00221.0 0.40 ug/L1 Chloroethane ND 01/06/2023 00222.0 0.40 ug/L1 Chloroform ND 01/06/2023 00221.0 0.40 ug/L1 Chloromethane (Methyl chloride)ND 01/06/2023 00221.0 0.50 ug/L1 1,2-Dibromo-3-chloropropane (DBCP)ND 01/06/2023 00221.0 0.40 ug/L1 Dibromochloromethane ND 01/06/2023 00221.0 0.40 ug/L1 1,2-Dibromoethane (EDB)ND 01/06/2023 00221.0 0.40 ug/L1 Dibromomethane (Methylene bromide)ND 01/06/2023 00221.0 0.40 ug/L1 trans-1,4-Dichloro-2-butene ND 01/06/2023 00222.0 0.50 ug/L1 1,2-Dichlorobenzene ND 01/06/2023 00221.0 0.40 ug/L1 1,4-Dichlorobenzene ND 01/06/2023 00221.0 0.40 ug/L1 1,1-Dichloroethane ND 01/06/2023 00221.0 0.40 ug/L1 1,2-Dichloroethane ND 01/06/2023 00221.0 0.40 ug/L1 1,1-Dichloroethene ND 01/06/2023 00221.0 0.40 ug/L1 cis-1,2-Dichloroethene ND 01/06/2023 00221.0 0.40 ug/L1 trans-1,2-Dichloroethene ND 01/06/2023 00221.0 0.40 ug/L1 1,2-Dichloropropane ND 01/06/2023 00221.0 0.40 ug/L1 cis-1,3-Dichloropropene ND 01/06/2023 00221.0 0.40 ug/L1 trans-1,3-Dichloropropene ND 01/06/2023 00221.0 0.40 ug/L1 1,4-Dioxane ND 01/06/2023 00225013ug/L1 Ethylbenzene ND 01/06/2023 00221.0 0.40 ug/L1 2-Hexanone ND 01/06/2023 0022102.0 ug/L1 Methyl iodide (Iodomethane)ND 01/06/2023 00225.0 0.40 ug/L1 4-Methyl-2-pentanone ND 01/06/2023 0022102.0 ug/L1 Methylene chloride ND 01/06/2023 00221.0 0.40 ug/L1 Styrene ND 01/06/2023 00221.0 0.41 ug/L1 1,1,1,2-Tetrachloroethane ND 01/06/2023 00221.0 0.40 ug/L1 1,1,2,2-Tetrachloroethane ND 01/06/2023 00221.0 0.40 ug/L1 Tetrachloroethene ND 01/06/2023 00221.0 0.40 ug/L1 Toluene ND 01/06/2023 00221.0 0.40 ug/L1 1,1,1-Trichloroethane ND 01/06/2023 00221.0 0.40 ug/L1 1,1,2-Trichloroethane ND 01/06/2023 00221.0 0.40 ug/L1 Trichloroethene ND 01/06/2023 00221.0 0.40 ug/L1 Trichlorofluoromethane ND 01/06/2023 00221.0 0.40 ug/L1 Note:Calculations are performed before rounding to avoid round-off errors in calculated results LOQ = Limit of Quantitation ND = Not detected at or above the DL J = Estimated result < LOQ and > DL N = Recovery is out of criteria P = The RPD between two GC columns exceeds 40% + = RPD is out of criteria _DL = Detection Limit * = RSD is out of criteria 106 Vantage Point Drive West Columbia, SC 29172 (803) 791-9700 Fax (803) 791-9111 www.pacelabs.com Pace Analytical Services, LLC (formerly Shealy Environmental Services, Inc.) Page 55 of 72 Volatile Organic Compounds by GC/MS - MB Batch:Prep Method: Sample ID:YQ64266-001 64266 5030B Analytical Method:8260D Matrix:Aqueous Parameter Result Q LOQ DL Units Analysis DateDil 1,2,3-Trichloropropane ND 01/06/2023 00221.0 0.40 ug/L1 Vinyl acetate ND 01/06/2023 00225.0 1.2 ug/L1 Vinyl chloride ND 01/06/2023 00221.0 0.40 ug/L1 Xylenes (total)ND 01/06/2023 00221.0 0.40 ug/L1 Surrogate Q % Rec Acceptance Limit Bromofluorobenzene 105 70-130 1,2-Dichloroethane-d4 111 70-130 Toluene-d8 111 70-130 Note:Calculations are performed before rounding to avoid round-off errors in calculated results LOQ = Limit of Quantitation ND = Not detected at or above the DL J = Estimated result < LOQ and > DL N = Recovery is out of criteria P = The RPD between two GC columns exceeds 40% + = RPD is out of criteria _DL = Detection Limit * = RSD is out of criteria 106 Vantage Point Drive West Columbia, SC 29172 (803) 791-9700 Fax (803) 791-9111 www.pacelabs.com Pace Analytical Services, LLC (formerly Shealy Environmental Services, Inc.) Page 56 of 72 Volatile Organic Compounds by GC/MS - LCS Batch:Prep Method: Sample ID:YQ64266-002 64266 5030B Analytical Method:8260D Matrix:Aqueous Parameter Result Q % Rec Spike Amount Analysis Date %Rec LimitDil(ug/L)(ug/L) Acetone 190 01/05/2023 2141N18610060-1401 Acrylonitrile 99 01/05/2023 21419910070-1301 Benzene 46 01/05/2023 2141935070-1301 Bromochloromethane 46 01/05/2023 2141925070-1301 Bromodichloromethane 46 01/05/2023 2141915070-1301 Bromoform 44 01/05/2023 2141895070-1301 Bromomethane (Methyl bromide)53 01/05/2023 21411075070-1301 2-Butanone (MEK)140 01/05/2023 2141N13810070-1301 Carbon disulfide 49 01/05/2023 2141995070-1301 Carbon tetrachloride 46 01/05/2023 2141935070-1301 Chlorobenzene 48 01/05/2023 2141955070-1301 Chloroethane 48 01/05/2023 2141965070-1301 Chloroform 45 01/05/2023 2141915070-1301 Chloromethane (Methyl chloride)49 01/05/2023 2141985060-1401 1,2-Dibromo-3-chloropropane (DBCP)46 01/05/2023 2141935070-1301 Dibromochloromethane 45 01/05/2023 2141915070-1301 1,2-Dibromoethane (EDB)47 01/05/2023 2141955070-1301 Dibromomethane (Methylene bromide)49 01/05/2023 2141985070-1301 trans-1,4-Dichloro-2-butene 51 01/05/2023 21411015070-1301 1,2-Dichlorobenzene 50 01/05/2023 21411005070-1301 1,4-Dichlorobenzene 49 01/05/2023 2141995070-1301 1,1-Dichloroethane 49 01/05/2023 2141975070-1301 1,2-Dichloroethane 50 01/05/2023 21411005070-1301 1,1-Dichloroethene 45 01/05/2023 2141905070-1301 cis-1,2-Dichloroethene 48 01/05/2023 2141965070-1301 trans-1,2-Dichloroethene 48 01/05/2023 2141965070-1301 1,2-Dichloropropane 49 01/05/2023 2141985070-1301 cis-1,3-Dichloropropene 48 01/05/2023 2141965070-1301 trans-1,3-Dichloropropene 49 01/05/2023 2141975070-1301 1,4-Dioxane 870 01/05/2023 2141N17550060-1401 Ethylbenzene 49 01/05/2023 2141975070-1301 2-Hexanone 130 01/05/2023 2141N13410070-1301 Methyl iodide (Iodomethane)48 01/05/2023 2141975070-1301 4-Methyl-2-pentanone 100 01/05/2023 214110010070-1301 Methylene chloride 49 01/05/2023 2141985070-1301 Styrene 48 01/05/2023 2141965070-1301 1,1,1,2-Tetrachloroethane 47 01/05/2023 2141945070-1301 1,1,2,2-Tetrachloroethane 49 01/05/2023 2141985070-1301 Tetrachloroethene 46 01/05/2023 2141925070-1301 Toluene 48 01/05/2023 2141965070-1301 1,1,1-Trichloroethane 46 01/05/2023 2141915070-1301 1,1,2-Trichloroethane 48 01/05/2023 2141965070-1301 Trichloroethene 46 01/05/2023 2141915070-1301 Trichlorofluoromethane 52 01/05/2023 21411045070-1301 Note:Calculations are performed before rounding to avoid round-off errors in calculated results LOQ = Limit of Quantitation ND = Not detected at or above the DL J = Estimated result < LOQ and > DL N = Recovery is out of criteria P = The RPD between two GC columns exceeds 40% + = RPD is out of criteria _DL = Detection Limit * = RSD is out of criteria 106 Vantage Point Drive West Columbia, SC 29172 (803) 791-9700 Fax (803) 791-9111 www.pacelabs.com Pace Analytical Services, LLC (formerly Shealy Environmental Services, Inc.) Page 57 of 72 Volatile Organic Compounds by GC/MS - LCS Batch:Prep Method: Sample ID:YQ64266-002 64266 5030B Analytical Method:8260D Matrix:Aqueous Parameter Result Q % Rec Spike Amount Analysis Date %Rec LimitDil(ug/L)(ug/L) 1,2,3-Trichloropropane 49 01/05/2023 2141995070-1301 Vinyl acetate 46 01/05/2023 2141915060-1401 Vinyl chloride 53 01/05/2023 21411065070-1301 Xylenes (total)94 01/05/2023 21419410070-1301 Surrogate Q % Rec Acceptance Limit Bromofluorobenzene 93 70-130 1,2-Dichloroethane-d4 90 70-130 Toluene-d8 94 70-130 Note:Calculations are performed before rounding to avoid round-off errors in calculated results LOQ = Limit of Quantitation ND = Not detected at or above the DL J = Estimated result < LOQ and > DL N = Recovery is out of criteria P = The RPD between two GC columns exceeds 40% + = RPD is out of criteria _DL = Detection Limit * = RSD is out of criteria 106 Vantage Point Drive West Columbia, SC 29172 (803) 791-9700 Fax (803) 791-9111 www.pacelabs.com Pace Analytical Services, LLC (formerly Shealy Environmental Services, Inc.) Page 58 of 72 Volatile Organic Compounds by GC/MS - LCSD Batch:Prep Method: Sample ID:YQ64266-003 64266 5030B Analytical Method:8260D Matrix:Aqueous Parameter Result Q % Rec Spike Amount Analysis Date% RPD %Rec Limit % RPD LimitDil(ug/L)(ug/L) Acetone 170 01/06/2023 0047N17210060-1407.5 201 Acrylonitrile 100 01/06/2023 004710510070-1305.1 201 Benzene 48 01/06/2023 0047965070-1303.2 201 Bromochloromethane 48 01/06/2023 0047965070-1304.2 201 Bromodichloromethane 46 01/06/2023 0047935070-1301.7 201 Bromoform 44 01/06/2023 0047885070-1300.93 201 Bromomethane (Methyl bromide)55 01/06/2023 00471105070-1303.4 201 2-Butanone (MEK)140 01/06/2023 0047N13810070-1300.38 201 Carbon disulfide 50 01/06/2023 00471015070-1302.1 201 Carbon tetrachloride 49 01/06/2023 0047975070-1304.7 201 Chlorobenzene 48 01/06/2023 0047965070-1300.90 201 Chloroethane 48 01/06/2023 0047965070-1300.65 201 Chloroform 47 01/06/2023 0047945070-1304.1 201 Chloromethane (Methyl chloride)49 01/06/2023 0047995060-1400.20 201 1,2-Dibromo-3-chloropropane (DBCP)44 01/06/2023 0047885070-1305.9 201 Dibromochloromethane 46 01/06/2023 0047925070-1300.91 201 1,2-Dibromoethane (EDB)48 01/06/2023 0047955070-1300.44 201 Dibromomethane (Methylene bromide)50 01/06/2023 00471015070-1303.4 201 trans-1,4-Dichloro-2-butene 40 01/06/2023 0047+8050 70-13024 201 1,2-Dichlorobenzene 48 01/06/2023 0047975070-1303.9 201 1,4-Dichlorobenzene 47 01/06/2023 0047955070-1304.4 201 1,1-Dichloroethane 51 01/06/2023 00471015070-1303.9 201 1,2-Dichloroethane 52 01/06/2023 00471045070-1303.2 201 1,1-Dichloroethene 47 01/06/2023 0047935070-1303.8 201 cis-1,2-Dichloroethene 49 01/06/2023 0047995070-1302.7 201 trans-1,2-Dichloroethene 50 01/06/2023 0047995070-1303.0 201 1,2-Dichloropropane 50 01/06/2023 00471005070-1301.8 201 cis-1,3-Dichloropropene 49 01/06/2023 0047985070-1301.4 201 trans-1,3-Dichloropropene 47 01/06/2023 0047955070-1302.4 201 1,4-Dioxane 790 01/06/2023 0047N15750060-14011 201 Ethylbenzene 48 01/06/2023 0047965070-1300.77 201 2-Hexanone 130 01/06/2023 0047N13110070-1302.1 201 Methyl iodide (Iodomethane)50 01/06/2023 00471005070-1303.3 201 4-Methyl-2-pentanone 100 01/06/2023 004710010070-1300.49 201 Methylene chloride 51 01/06/2023 00471025070-1304.0 201 Styrene 48 01/06/2023 0047965070-1300.51 201 1,1,1,2-Tetrachloroethane 47 01/06/2023 0047955070-1300.59 201 1,1,2,2-Tetrachloroethane 48 01/06/2023 0047955070-1302.8 201 Tetrachloroethene 47 01/06/2023 0047935070-1301.8 201 Toluene 49 01/06/2023 0047975070-1300.93 201 1,1,1-Trichloroethane 48 01/06/2023 0047965070-1305.0 201 1,1,2-Trichloroethane 48 01/06/2023 0047975070-1300.44 201 Trichloroethene 47 01/06/2023 0047945070-1303.5 201 Trichlorofluoromethane 52 01/06/2023 00471035070-1300.72 201 Note:Calculations are performed before rounding to avoid round-off errors in calculated results LOQ = Limit of Quantitation ND = Not detected at or above the DL J = Estimated result < LOQ and > DL N = Recovery is out of criteria P = The RPD between two GC columns exceeds 40% + = RPD is out of criteria _DL = Detection Limit * = RSD is out of criteria 106 Vantage Point Drive West Columbia, SC 29172 (803) 791-9700 Fax (803) 791-9111 www.pacelabs.com Pace Analytical Services, LLC (formerly Shealy Environmental Services, Inc.) Page 59 of 72 Volatile Organic Compounds by GC/MS - LCSD Batch:Prep Method: Sample ID:YQ64266-003 64266 5030B Analytical Method:8260D Matrix:Aqueous Parameter Result Q % Rec Spike Amount Analysis Date% RPD %Rec Limit % RPD LimitDil(ug/L)(ug/L) 1,2,3-Trichloropropane 47 01/06/2023 0047945070-1305.6 201 Vinyl acetate 44 01/06/2023 0047875060-1404.9 201 Vinyl chloride 51 01/06/2023 00471025070-1303.0 201 Xylenes (total)93 01/06/2023 00479310070-1301.4 201 Surrogate Q % Rec Acceptance Limit Bromofluorobenzene 93 70-130 1,2-Dichloroethane-d4 93 70-130 Toluene-d8 93 70-130 Note:Calculations are performed before rounding to avoid round-off errors in calculated results LOQ = Limit of Quantitation ND = Not detected at or above the DL J = Estimated result < LOQ and > DL N = Recovery is out of criteria P = The RPD between two GC columns exceeds 40% + = RPD is out of criteria _DL = Detection Limit * = RSD is out of criteria 106 Vantage Point Drive West Columbia, SC 29172 (803) 791-9700 Fax (803) 791-9111 www.pacelabs.com Pace Analytical Services, LLC (formerly Shealy Environmental Services, Inc.) Page 60 of 72 Volatile Organic Compounds by GC/MS (SIM) - MB Batch:Prep Method: Sample ID:YQ64337-001 64337 5030B Analytical Method:8260D (SIM) Matrix:Aqueous Parameter Result Q LOQ DL Units Analysis DateDil 1,4-Dioxane ND 01/06/2023 15513.0 1.0 ug/L1 Surrogate Q % Rec Acceptance Limit 1,2-Dichloroethane-d4 93 40-170 Note:Calculations are performed before rounding to avoid round-off errors in calculated results LOQ = Limit of Quantitation ND = Not detected at or above the DL J = Estimated result < LOQ and > DL N = Recovery is out of criteria P = The RPD between two GC columns exceeds 40% + = RPD is out of criteria _DL = Detection Limit * = RSD is out of criteria 106 Vantage Point Drive West Columbia, SC 29172 (803) 791-9700 Fax (803) 791-9111 www.pacelabs.com Pace Analytical Services, LLC (formerly Shealy Environmental Services, Inc.) Page 61 of 72 Volatile Organic Compounds by GC/MS (SIM) - LCS Batch:Prep Method: Sample ID:YQ64337-002 64337 5030B Analytical Method:8260D (SIM) Matrix:Aqueous Parameter Result Q % Rec Spike Amount Analysis Date %Rec LimitDil(ug/L)(ug/L) 1,4-Dioxane 51 01/06/2023 13491025070-1301 Surrogate Q % Rec Acceptance Limit 1,2-Dichloroethane-d4 107 40-170 Note:Calculations are performed before rounding to avoid round-off errors in calculated results LOQ = Limit of Quantitation ND = Not detected at or above the DL J = Estimated result < LOQ and > DL N = Recovery is out of criteria P = The RPD between two GC columns exceeds 40% + = RPD is out of criteria _DL = Detection Limit * = RSD is out of criteria 106 Vantage Point Drive West Columbia, SC 29172 (803) 791-9700 Fax (803) 791-9111 www.pacelabs.com Pace Analytical Services, LLC (formerly Shealy Environmental Services, Inc.) Page 62 of 72 Volatile Organic Compounds by GC/MS (SIM) - LCSD Batch:Prep Method: Sample ID:YQ64337-003 64337 5030B Analytical Method:8260D (SIM) Matrix:Aqueous Parameter Result Q % Rec Spike Amount Analysis Date% RPD %Rec Limit % RPD LimitDil(ug/L)(ug/L) 1,4-Dioxane 46 01/06/2023 1414915070-13011 201 Surrogate Q % Rec Acceptance Limit 1,2-Dichloroethane-d4 99 40-170 Note:Calculations are performed before rounding to avoid round-off errors in calculated results LOQ = Limit of Quantitation ND = Not detected at or above the DL J = Estimated result < LOQ and > DL N = Recovery is out of criteria P = The RPD between two GC columns exceeds 40% + = RPD is out of criteria _DL = Detection Limit * = RSD is out of criteria 106 Vantage Point Drive West Columbia, SC 29172 (803) 791-9700 Fax (803) 791-9111 www.pacelabs.com Pace Analytical Services, LLC (formerly Shealy Environmental Services, Inc.) Page 63 of 72 ICP-MS - MB Batch:Prep Method: Prep Date: Sample ID:XQ63790-001 63790 3005A 01/03/2023 1029Analytical Method:6020B Matrix:Aqueous Parameter Result Q LOQ DL Units Analysis DateDil Arsenic ND 01/04/2023 18122.0 1.3 ug/L1 Barium ND 01/04/2023 18125.0 1.3 ug/L1 Cadmium ND 01/04/2023 18120.50 0.13 ug/L1 Chromium ND 01/04/2023 18125.0 1.3 ug/L1 Lead ND 01/04/2023 18121.0 0.25 ug/L1 Selenium ND 01/04/2023 18125.0 1.3 ug/L1 Silver ND 01/04/2023 18121.0 0.25 ug/L1 Note:Calculations are performed before rounding to avoid round-off errors in calculated results LOQ = Limit of Quantitation ND = Not detected at or above the DL J = Estimated result < LOQ and > DL N = Recovery is out of criteria P = The RPD between two GC columns exceeds 40% + = RPD is out of criteria _DL = Detection Limit * = RSD is out of criteria 106 Vantage Point Drive West Columbia, SC 29172 (803) 791-9700 Fax (803) 791-9111 www.pacelabs.com Pace Analytical Services, LLC (formerly Shealy Environmental Services, Inc.) Page 64 of 72 ICP-MS - LCS Batch:Prep Method: Prep Date: Sample ID:XQ63790-002 63790 3005A 01/03/2023 1029Analytical Method:6020B Matrix:Aqueous Parameter Result Q % Rec Spike Amount Analysis Date %Rec LimitDil(ug/L)(ug/L) Arsenic 91 01/04/2023 18229110080-1201 Barium 92 01/04/2023 18229210080-1201 Cadmium 100 01/04/2023 182210310080-1201 Chromium 100 01/04/2023 182210010080-1201 Lead 110 01/04/2023 182210710080-1201 Selenium 88 01/04/2023 18228810080-1201 Silver 95 01/04/2023 18229510080-1201 Note:Calculations are performed before rounding to avoid round-off errors in calculated results LOQ = Limit of Quantitation ND = Not detected at or above the DL J = Estimated result < LOQ and > DL N = Recovery is out of criteria P = The RPD between two GC columns exceeds 40% + = RPD is out of criteria _DL = Detection Limit * = RSD is out of criteria 106 Vantage Point Drive West Columbia, SC 29172 (803) 791-9700 Fax (803) 791-9111 www.pacelabs.com Pace Analytical Services, LLC (formerly Shealy Environmental Services, Inc.) Page 65 of 72 ICP-MS - MS Batch:Prep Method: Prep Date: Sample ID:XL28042-001MS 63790 3005A 01/03/2023 1029Analytical Method:6020B Matrix:Aqueous Parameter Result Q % Rec Spike Amount Analysis Date %Rec Limit Sample Amount Dil(ug/L)(ug/L)(ug/L) Arsenic 98 01/04/2023 20499710075-1251.3 1 Barium 150 01/04/2023 20499610075-125561 Cadmium 100 01/04/2023 204910210075-1250.22 1 Chromium 99 01/04/2023 20499110075-1257.8 1 Lead 100 01/04/2023 20499910075-1251.5 1 Selenium 96 01/04/2023 20499610075-125ND1 Silver 93 01/04/2023 20499310075-125ND1 Note:Calculations are performed before rounding to avoid round-off errors in calculated results LOQ = Limit of Quantitation ND = Not detected at or above the DL J = Estimated result < LOQ and > DL N = Recovery is out of criteria P = The RPD between two GC columns exceeds 40% + = RPD is out of criteria _DL = Detection Limit * = RSD is out of criteria 106 Vantage Point Drive West Columbia, SC 29172 (803) 791-9700 Fax (803) 791-9111 www.pacelabs.com Pace Analytical Services, LLC (formerly Shealy Environmental Services, Inc.) Page 66 of 72 ICP-MS - MSD Batch:Prep Method: Prep Date: Sample ID:XL28042-001MD 63790 3005A 01/03/2023 1029Analytical Method:6020B Matrix:Aqueous Parameter Result Q % Rec Spike Amount Analysis Date% RPD %Rec Limit % RPD Limit Sample Amount Dil(ug/L)(ug/L)(ug/L) Arsenic 98 01/04/2023 20599710075-1250.36 201.3 1 Barium 160 01/04/2023 205910010075-1252.3 20561 Cadmium 100 01/04/2023 205910110075-1251.3 200.22 1 Chromium 99 01/04/2023 20599110075-1250.14 207.8 1 Lead 100 01/04/2023 205910010075-1250.81 201.5 1 Selenium 97 01/04/2023 20599710075-1250.87 20ND1 Silver 94 01/04/2023 20599410075-1251.2 20ND1 Note:Calculations are performed before rounding to avoid round-off errors in calculated results LOQ = Limit of Quantitation ND = Not detected at or above the DL J = Estimated result < LOQ and > DL N = Recovery is out of criteria P = The RPD between two GC columns exceeds 40% + = RPD is out of criteria _DL = Detection Limit * = RSD is out of criteria 106 Vantage Point Drive West Columbia, SC 29172 (803) 791-9700 Fax (803) 791-9111 www.pacelabs.com Pace Analytical Services, LLC (formerly Shealy Environmental Services, Inc.) Page 67 of 72 ICP-MS - MB Batch:Prep Method: Prep Date: Sample ID:XQ63783-001 63783 12/29/2022 0950Analytical Method:7470A Matrix:Aqueous Parameter Result Q LOQ DL Units Analysis DateDil Mercury ND 12/29/2022 12510.00020 0.000091 mg/L1 Note:Calculations are performed before rounding to avoid round-off errors in calculated results LOQ = Limit of Quantitation ND = Not detected at or above the DL J = Estimated result < LOQ and > DL N = Recovery is out of criteria P = The RPD between two GC columns exceeds 40% + = RPD is out of criteria _DL = Detection Limit * = RSD is out of criteria 106 Vantage Point Drive West Columbia, SC 29172 (803) 791-9700 Fax (803) 791-9111 www.pacelabs.com Pace Analytical Services, LLC (formerly Shealy Environmental Services, Inc.) Page 68 of 72 ICP-MS - LCS Batch:Prep Method: Prep Date: Sample ID:XQ63783-002 63783 12/29/2022 0950Analytical Method:7470A Matrix:Aqueous Parameter Result Q % Rec Spike Amount Analysis Date %Rec LimitDil(mg/L)(mg/L) Mercury 0.0019 12/29/2022 1253970.0020 80-1201 Note:Calculations are performed before rounding to avoid round-off errors in calculated results LOQ = Limit of Quantitation ND = Not detected at or above the DL J = Estimated result < LOQ and > DL N = Recovery is out of criteria P = The RPD between two GC columns exceeds 40% + = RPD is out of criteria _DL = Detection Limit * = RSD is out of criteria 106 Vantage Point Drive West Columbia, SC 29172 (803) 791-9700 Fax (803) 791-9111 www.pacelabs.com Pace Analytical Services, LLC (formerly Shealy Environmental Services, Inc.) Page 69 of 72 Chain of Custody and Miscellaneous Documents 106 Vantage Point Drive West Columbia, SC 29172 (803) 791-9700 Fax (803) 791-9111 www.pacelabs.com Pace Analytical Services, LLC (formerly Shealy Environmental Services, Inc.) Page 70 of 72 PACE ANALYTICAL SERVICES, LLC 106 Vantage Point Drive West Columbia, SC 29172 (803) 791-9700 Fax (803) 791-9111 www.pacelabs.com Pace Analytical Services, LLC (formerly Shealy Environmental Services, Inc.) Page 71 of 72 PACE ANALYTICAL SERVICES, LLC 106 Vantage Point Drive West Columbia, SC 29172 (803) 791-9700 Fax (803) 791-9111 www.pacelabs.com Pace Analytical Services, LLC (formerly Shealy Environmental Services, Inc.) Page 72 of 72 APPENDIX C HISTORICAL GROUNDWATER ANALYTICAL RESULTS MW-1 HISTORICAL GROUNDWATER ANALYTICAL RESULTS GASTON COUNTY - CLOSED AUTEN LANDFILL GASTONIA, NORTH CAROLINA Date 4/97 9/97 4/98 9/98 4/99 9/99 5/00 10/00 5/01 12/01 7/02 12/02 5/03 11/03 5/04 11/04 4/05 11/05 5/06 11/06 6/07 11/07 6/08 11/08 6/09 1/22 4/10 11/10 5/11 11/11 5/12 12/12 5/13 12/13 5/14 12/14 5/15 12/15 5/16 11/16 7/17 11/17 5/18 11/18 5/19 11/19 7/20 12/20 8/21 12/21 8/22 12/22 NCGPS Appendix I VOCs Acetone BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL 3.3BJ BDL BDL BDL BDL 12J 10J BDL BDL BDL BDL BDL BDL BDL BDL BDL 3.3J 3.2J BDL 3.3J 2J 3.3J BDL BDL BDL BDL BDL BDL BDL BDL BDL 6,000 CD BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL 2.5 BDL BDL 0.34J BDL BDL BDL BDL 1.3 0.22J BDL BDL BDL 0.1J BDL 0.19J BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL 700 CB BDL BDL 13 7.2 16 20 26 18 17 11.5 14.6 5 8 5 5.5 12 2 6.2 13 BDL 14 3.8 3.5 1 15 0.82J BDL 6 0.93J BDL 0.33J 2.6 BDL 11 BDL 1.4 BDL BDL 0.23J BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL 1.1 BDL BDL 50 1,2-DCB BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL 0.54J BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL 20 1,4-DCB BDL BDL BDL BDL 6 8 BDL BDL BDL 4.2 4.9 2.4 2.7 BDL 1.6 2.8 BDL 1.2 3.4 BDL 2.6 0.82J 1.1 0.57J 1.2 BDL BDL 1.4 0.39J BDL BDL 1.9 BDL 1.9 BDL BDL BDL BDL BDL 0.55J BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL 6 cis-1,2-DCE BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL 2.1 BDL 1.4 BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL 0.12J BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL 70 EB BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL 0.42J BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL 600 Toluene BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL 1 BDL BDL 0.52J BDL BDL BDL 0.49J BDL 7.7 BDL 0.89J BDL BDL 1.4 BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL 600 VC BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL 4 BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL 0.03 EPA 8260 (SIM) 1,4-Dioxane NT NT NT NT NT NT NT NT NT NT NT NT NT NT NT NT NT NT NT NT NT NT NT NT NT NT NT NT NT NT NT NT NT NT NT NT NT NT NT NT NT NT NT BDL 3.4 BDL 6.2 3.4 2.3J 15 5.6 BDL 3 RCRA Metals Arsenic BDL 6 BDL BDL BDL BDL 16 30 BDL BDL BDL BDL 14 6.1 8.4 BDL 6.3 6 BDL BDL 4.1J BDL BDL BDL 7J BDL BDL 5.9J 9.3BJ 6.7J 6.8J 4J BDL 4.7J 8.6J BDL 2.6J 2.4J 1.8 2.3 4.3 3.7 2.8 2.4 2.3 2.1 2.2 2.5 20 BDL BDL 1.3J 10 Barium 510 1800 490 1100 BDL 540 840 1000 BDL 335 384 190 200 230 380 320 140 400 390 120 240 170 170 74 170 92 140 330 240 95 90 230 110 210 140 180 120 87 100 260 90 120 93 94 140 110 150 85 120 120 130 56 700 Cadmium 2 6 3 5.3 1 5 16 10 2 BDL BDL BDL BDL BDL BDL BDL BDL BDL 1.2 BDL BDL BDL BDL BDL BDL BDL BDL 1J BDL 0.68J 0.99J BDL BDL BDL BDL BDL 0.7J BDL 0.31 0.42 0.17J BDL 0.27J0.75J BDL 0.85 0.39j 0.16J0.24J0.16J BDL 0.22J 2 Chromium 32 54 27 48 BDL 22 45 82 14 BDL 9 BDL BDL 14 28 11 BDL 15 12 BDL 14 2.3J BDL BDL BDL BDL BDL 20 13 BDL BDL 2.1BJ BDL BDL BDL 2.5J 1.1J 1.7J 0.87J 2J 1.8 2.4J 2.4J 1.7 BDL BDL BDL BDL BDL BDL BDL 7.8 10 Lead 35 43 41 49 BDL 21 53 96 BDL BDL 5 BDL 120 36 48 18 11 19 860 450 160 40 500 530 82 20 29 140 75 19 9.6J 2.4J 9.1J BDL 4.4BJ 5.5J 7.6J 7.1J 3.7 4 1.3 2.7 3.6 3 0.54J0.82J 0.8J 1.7 1.2 0.51J0.51J 1.5 15 Selenium BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL 5 BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL 7.3BJ BDL 4.9J BDL 3.8J BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL 20 Silver BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL0.74BJBDL 1.2J BDL BDL 1.1 BDL BDL 2.6J BDL BDL BDL BDL BDL BDL BDL BDL 3.1BJ BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL 20 Mercury BDL BDL BDL 1 BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL .053J 0.19 .082J 0.2 BDL BDL .055BJ .016J .087BJ .022J BDL BDL BDL BDL BDL BDL BDL BDL0.22B BDL 0.17J BDL BDL BDL BDL BDL 1 Notes: Groundwater samples collected on above listed dates and analyzed for Appendix I VOC's and RCRA metals; and 1-4-dioxane by EPA Method 8260D (select ion monitoring (SIM)) starting on November 13, 2018. BDL = below detection limit; NT = not tested NCGPS = North Carolina Groundwater Protection Standard VOCs = volatile organic compounds CD = carbon disulfide; CB = chlorobenzene; DCB = dichlorobenzene; DCE = dichloroethene; EB = ethlbenzene; VC = vinyl chloride bold and shade denotes above NCGPS data presented in micrograms per liter (ug/l) B = detected in method blank J = estimated result <PQL and >=MDL rk:table:authistgw.mw1 MW-2 HISTORICAL GROUNDWATER ANALYTICAL RESULTS GASTON COUNTY - CLOSED AUTEN LANDFILL GASTONIA, NORTH CAROLINA Date 4/97 9/97 4/98 9/98 4/99 9/99 5/00 10/00 5/01 12/01 7/02 12/02 5/03 11/03 5/04 11/04 4/05 11/05 5/06 11/06 6/07 11/07 6/08 11/08 6/09 11/09 4/10 11/10 5/11 11/11 5/12 12/12 5/13 12/13 5/14 12/14 5/15 12/15 5/16 11/16 7/17 11/17 5/18 11/18 5/19 11/19 7/20 12/20 8/21 12/21 8/22 12/22 NCGPS Appendix I VOCs Acetone BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL 30 BDL 8.5J 4.9BJ BDL 10J BDL 9.6J 17J 13J BDL 12J 6.7J BDL BDL BDL 7.9J BDL 7.8J 5.9J 8J BDL BDL 2.1J 3.4J 5.2 2.5J BDL BDL BDL BDL BDL BDL BDL 6,000 Benzene 5 BDL BDL BDL BDL 5 BDL BDL BDL 3.5 4.0 3.8 3.4 2.2 4.2 3.1 3.2 2.6 3.0 2.9 2.4 2.6 3.1 3.4 2.6 3.1 3.1 3.5 2.7 2.8 2.9 3.3 3.0 2.5 3.1 2.8 3.1 2.6 2.3 2.9 3.2 3.2 3.0 3.2 2.1 2.4 3.6 3.9 3.7 3.3 3.8 2.7 1 2-ButanoneBDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL 4J 3.1J 4.4J BDL BDL BDL BDL 4,000 CD 29 14 BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL 4 1.5 BDL BDL BDL BDL BDL BDL 0.42J BDL BDL BDL BDL 0.97J BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL 700 CB BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL 7.7 9 9.5 9.3 16 24 17 50 CA BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL 3 BDL BDL BDL BDL BDL BDL BDL BDL 0.68J BDL BDL 2.1 1J 0.97J BDL BDL 0.63J 0.72J 0.48J 0.54J 0.53J BDL BDL BDL 0.63J 0.4J BDL BDL BDL BDL 0.6 0.41J 0.49J 0.84J BDL 0.55J BDL 0.61J BDL 3,000 CM BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL 0.29J 0.22J BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL 3 1,2-DCB BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL 1.5 BDL BDL 1.2 1 BDL BDL 1.3 1.1 0.84J 0.89J 1.4 1.7 BDL BDL 0.88J 1.1 1 1.6 1.3 1.3 1.1 0.87J 1.2 0.88J 1.6 0.85J 0.9J 0.97J 2 1.6 1.5 0.8 0.52J 0.71J 0.8J 0.93J 0.76J 1.3 1.7 1.3 20 1,4-DCB 20 19 19 16 26 28 24 20 24 23.9 23.5 21 11 12 17 16 14 16 19 17 16 15 19 21 18 12 13 18 14 19 19 20 15 15 17 15 18 14 14 14 20 19 17 12 10 12 13 12 12 15 17 13 6 1,1-DCA BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL 1.3 BDL BDL BDL BDL BDL BDL BDL 0.64J 0.43J 0.39J 0.64J BDL 0.73J 0.7J 0.84J 0.48J 0.52J 0.5J 0.38J 0.45J 0.34J 0.57J 0.27J 0.33J 0.32 0.43J BDL BDL BDL BDL 0.36J 0.41J BDL 0.42J BDL BDL BDL 0.57J BDL 6 1,2-DCP BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL 0.78J 0.52J 0.4J 0.52J BDL 0.56J 0.77J 1 0.44J 0.43J 0.54J 0.39J 0.58J 0.53J 0.52J 0.31J BDL 0.38J 0.6J BDL BDL BDL BDL 0.41J 0.47J BDL BDL BDL BDL BDL BDL BDL 0.6 cis-1,2-DCE 9.2 12 BDL 8.5 BDL 11 BDL 6 BDL BDL BDL 2 26 5 3.3 8.4 13 6.7 2.1 BDL 3.9 2 1 1.2 7.5 5.7 13 4.3 7.8 3 3.7 0.82J 14 6.3 3.8 2.3 1.7 2.5 4 1.6 BDL BDL 0.41J 6.9 6.1 2.6 2.1 0.94J BDL BDL BDL BDL 70 1,4-Dioxane NT NT NT NT NT NT NT NT NT NT NT NT NT NT NT NT NT NT NT NT NT NT NT NT NT NT NT NT NT NT NT NT NT NT NT NT NT NT NT NT NT NT NT 160 35J 88 33J 100J 61 170 180 170 3 EB BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL 4 BDL BDL BDL 2.4 BDL 2.5 BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL 600 MC BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL 0.79BJ BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL 5 4-M-2-P BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL 0.4J BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL 100 Styrene BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL 0.23J BDL 0.12J BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL 70 Toluene BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL 0.38J 0.36J 0.44J 0.4J 0.59J 0.37J 0.56J BDL 0.34J 0.35J 0.33J 0.4J 0.35J BDL 0.45J 0.4J 0.47J 0.3J 0.3J BDL BDL BDL BDL 0.31J 0.45J BDL 0.43J 0.62J BDL BDL BDL BDL 600 TCE BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL 0.22J BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL 3 VC BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL 6.7 3.9 2.2 2.5 BDL 2.2 BDL BDL 1.4 0.88J 0.77J 0.42J BDL 1.2 2.2 0.22J 0.98J 0.46J 0.55J 0.22J 1.6 1.3 1.3 BDL 0.48J 0.71J 0.92J BDL BDL BDL 1.5 1.9 1.3 0.82J 1.1 BDL 0.56J BDL BDL BDL 0.03 Xylenes BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL 2.5 BDL BDL BDL BDL BDL BDL 1.1 BDL 0.71J 0.6J 2.2 BDL 0.62J BDL 1.2 BDL 1.1 0.57J 0.69J 0.94J 0.36J BDL 0.76J 0.9J 1.1 0.76 0.44J 0.75J 1.1 0.68J 0.9J 0.36J BDL 0.66J 0.58J 0.7J 0.54J 0.84J 0.78J 0.6J 500 EPA 8260 (SIM) 1,4-Dioxane NT NT NT NT NT NT NT NT NT NT NT NT NT NT NT NT NT NT NT NT NT NT NT NT NT NT NT NT NT NT NT NT NT NT NT NT NT NT NT NT NT NT NT 100 40 110 88 130 76 170 220 110 3 RCRA Metals Arsenic 7 BDL BDL 6.5 BDL BDL BDL BDL BDL BDL 12 BDL 14 BDL 7.6 5.2 9.8 12 7.8 13 7.9 12 11 11 15 4.5J 8.5J 8.6BJ 25B 12 8J 7J 16 18 23B 11 12 12J 9 9.9 16 10 14 12 9.2 10 9.6 11 8.3 9.3 9.8 8.7 10 Barium 1100 1000 1600 1000 590 800 BDL BDL BDL 609 686 720 120 720 780 610 600 590 670 910 480 51 650 580 460 450 560 510 600 470 600 490 560 380 490 420 590 500 410 470 530 550 620 440 360 440 390 460 420 450 530 470 700 Cadmium 14 15 2 3.5 BDL 6 12 3 1 BDL 4 BDL BDL BDL 2.3 BDL BDL BDL BDL BDL BDL BDL BDL 0.94J BDL 0.73J BDL BDL BDL BDL 2.1 BDL 2.1 BDL BDL BDL 1J 0.6J 0.61 0.55 BDL 0.33J 0.71 0.53J 0.25J 0.25J 0.26J 0.25J 0.3J BDL 0.17J 0.86 2 Chromium 25 83 44 20 BDL 10 BDL BDL BDL BDL 6 BDL BDL BDL 11 BDL BDL BDL BDL 7.1 BDL BDL BDL BDL BDL 2.1J BDL BDL 2.1J BDL BDL BDL BDL BDL BDL BDL 0.74J 0.79J BDL BDL BDL BDL 1.4J 0.57J BDL BDL 1.9J BDL BDL BDL BDL 2.1J 10 Lead 30 54 49 180 BDL BDL BDL BDL BDL BDL 6 BDL BDL BDL BDL 10 BDL 5.8 BDL 7 BDL BDL 8.9 14 10 4.4J BDL BDL BDL BDL 2.6J BDL 44 BDL BDL 6.8J BDL BDL BDL 0.2J BDL BDL 0.48J 0.12J BDL BDL BDL 0.25J BDL BDL BDL 1.1 15 Mercury BDL BDL BDL 1.4 BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL 0.061J0.089J BDL BDL 0.043J0.22B BDL BDL BDL BDL BDL 0.091J BDL BDL BDL0.13BJ BDL 0.19J BDL BDL BDL BDL BDL 1 Selenium BDL BDL BDL BDL BDL BDL BDL BDL BDL 6 BDL 17 BDL 17 BDL BDL BDL BDL BDL BDL BDL BDL BDL 8.8 BDL BDL 2.8BJ BDL 15 BDL 3.5J BDL BDL BDL BDL BDL BDL BDL BDL 1.6 19 BDL BDL BDL BDL 1.6J 2.6J 3.7J 1.3J 5.7 12 6 20 Silver BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL 4.7J BDL 0.62J BDL 4.6J BDL BDL 4.1J BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL 20 Notes: Groundwater samples collected on above listed dates and analyzed for Appendix I VOC's and RCRA metals; and 1-4-dioxane by EPA Method 8260D (select ion monitoring (SIM)) starting on November 13, 2018. BDL = below detection limit; NT = not tested NCGPS = North Carolina Groundwater Protection Standard VOCs=volatile organic compounds;CB = chlorobenzene; CA = chloroethane; CD = carbon disulfide;CM = chloromethane; DCB=dichlorobenzene;DCP=dichloropropane; DCA=dichloroethane; DCE=dichloroethene; EB = etylbenzene; MC=methylene chloride; 4-M-2-P=4-methyl-2-pentanone; TCE = trichloroethene; VC = vinyl chloride bold and shade denotes above NCGPS data presented in micrograms per liter (ug/l) B = detected in method blank J = estimated result <PQL and >=MDL MW-3 HISTORICAL GROUNDWATER ANALYTICAL RESULTS GASTON COUNTY - CLOSED AUTEN LANDFILL GASTONIA, NORTH CAROLINA Date 4/97 9/97 4/98 9/98 4/99 9/99 5/00 10/00 5/01 12/01 7/02 12/02 5/03 11/03 5/04 11/04 4/05 11/05 5/06 11/06 6/07 11/07 6/08 11/08 6/09 11/09 4/10 11/10 5/11 11/11 5/12 12/12 5/13 12/13 5/14 12/14 5/15 12/15 5/16 11/16 7/17 11/17 5/18 11/18 5/19 11/19 7/20 12/20 8/21 12/21 8/22 12/22 NCGPS Appendix I VOCs Acetone BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL 2.2J 3.7BJ BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL 2.4J BDL BDL 2.2J BDL 4.2J 5.7 BDL BDL BDL BDL BDL BDL BDL BDL 6,000 Benzene BDL BDL BDL BDL BDL BDL BDL BDL BDL 3.9 2 1.6 BDL BDL 1.2 1.4 BDL 1.4 1.5 1.3 1.4 2.1 1.1 1.5 BDL 1.5 1.6 2.7 1.3 3.6 1.7 3.1 1.7 1.3 1.8 1.4 1.5 1.6 2.0 2.8 1.3 2.6 1.4 1.8 1.5 1.5 1.7 0.76J 0.7J 1.8 2.3 2.8 1 BF BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL 0.38J BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL 4 CD BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL 1 1.6 BDL BDL BDL BDL BDL BDL BDL 0.62J BDL BDL BDL BDL 0.87J BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL 700 CB BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL 0.96J 1.1 0.5J BDL BDL 0.92J 1.1 2.2 0.69J 3.5 1.4 2.9 1.2 0.87J 1.5 1.1 1.2 0.95J BDL 2.7 1 3.6 1.5 2 BDL 2.3 1.8 0.77J 0.79J 2.6 1.7 3.8 50 1,2-DCB BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL 1.7 BDL 1 BDL BDL BDL BDL BDL BDL BDL 0.85J BDL 1.5 BDL 0.38J BDL BDL BDL BDL BDL 0.78J BDL 1.5 20 1,4-DCB BDL BDL BDL BDL BDL BDL BDL BDL BDL 4.2 BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL 1.2 BDL 1.2 BDL BDL BDL 2 BDL 9.6 0.46J 6.1 0.67J 0.37J 0.66J 0.45J 0.46J 0.86J 0.77J 4.9 0.57J 9.1 2.1 2.8 0.63J 2.5 0.87J BDL BDL 4.6 1.5 9.8 6 1,1-DCA BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL 0.17J 0.2J BDL 0.17J BDL BDL BDL 0.24J BDL 0.59J BDL 0.37J 0.18J BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL 6 cis-1,2-DCE 13 10 BDL 8.1 9 17 9 16 12 24.6 10.2 6.4 2.8 1.8 8.1 5.6 2.9 5.7 6.1 1.7 4.2 4.8 1.3 0.91J 0.95J 0.66J 2.4 0.65J 0.44J 0.9J 1.1 BDL 0.65J 0.16J 0.97J 0.37J BDL BDL 0.62J BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL 70 1,4-Dioxane NT NT NT NT NT NT NT NT NT NT NT NT NT NT NT NT NT NT NT NT NT NT NT NT NT NT NT NT NT NT NT NT NT NT NT NT NT NT NT NT NT NT NT 42J BDL 21J BDL BDL BDL 48J BDL 94.0 3 Toluene BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL 0.2J BDL BDL BDL BDL BDL BDL BDL 0.56J BDL 0.86J BDL BDL BDL BDL BDL BDL BDL 0.46J BDL 0.62J BDL 0.33J BDL BDL BDL BDL BDL 0.53J 0.5J 2.1 600 VC BDL BDL BDL BDL BDL BDL BDL BDL BDL 10.8 7.4 BDL BDL BDL 2.2 BDL BDL 2.4 BDL BDL 1.8 2.3 BDL 0.88J BDL 0.75J 1.1 BDL 0.35J 0.61J 0.85J BDL 0.6J BDL 0.6J BDL BDL BDL 0.55J BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL 0.03 Xylenes BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL 0.45J BDL BDL BDL BDL BDL BDL BDL 3.3 BDL 1.7 BDL BDL BDL BDL BDL 0.39J BDL 3.8 BDL 4.4 BDL 0.97J BDL BDL BDL BDL BDL BDL 0.42J 6.1 500 EPA 8260 (SIM) 1,4-Dioxane NT NT NT NT NT NT NT NT NT NT NT NT NT NT NT NT NT NT NT NT NT NT NT NT NT NT NT NT NT NT NT NT NT NT NT NT NT NT NT NT NT NT NT 26 4.8 10 3 3.1 6.5 67 13 170 3 RCRA Metals Arsenic BDL 5 BDL BDL BDL BDL 16 BDL BDL BDL BDL BDL 23 43 29 77 11 44 31 15 78 200 5.8 BDL 25 6.5J BDL BDL 22B BDL 14 BDL 22 16 BDL 6.7J 5.1J 5.5J 3.5 5 4.2 6.3 3.1 5.1 3.9 3.6 4.4 3.8 3.4 16 4.8 9.5 10 Barium 420 350 380 BDL BDL BDL 680 BDL BDL 213 73 110 81 700 390 740 120 380 390 200 260 820 63 65 73 82 57 80 65 210 71 180 83 56 62 60 67 78 50 170 59 270 70 110 51 110 51 59 52 170 140 330 700 Cadmium BDL 2 BDL BDL 2 3 17 BDL BDL BDL 1 BDL BDL BDL 3.6 BDL BDL BDL BDL BDL BDL BDL BDL 1.2J 0.88J 0.96J BDL BDL BDL BDL BDL BDL 1.3J BDL BDL BDL 1.3J 1J 0.93 0.64 0.13J 0.23J 0.19J 0.5J 0.27J BDL 0.77 0.61 0.15J 0.54 BDL 0.4J 2 Chromium 31 25 27 41 BDL 13 50 BDL BDL BDL BDL BDL BDL 50 31 53 BDL 29 30 12 22 63 BDL BDL 3.9J 3.7J BDL BDL BDL BDL BDL 2.4BJ BDL BDL BDL BDL 0.95J BDL BDL 0.82J BDL BDL BDL 0.43J BDL BDL BDL BDL BDL 1.4J BDL 2.1J 10 Lead 20 20 24 23 BDL BDL 44 BDL BDL BDL BDL BDL BDL 28 15 43 BDL 25 13 6.5 14 14 BDL 10 12 3.6J 5.8J BDL BDL BDL BDL BDL 71 BDL BDL 10 BDL BDL BDL 0.77J BDL 0.37J BDL 0.16J BDL BDL BDL BDL BDL 0.66J BDL 0.32J 15 Mercury BDL BDL BDL 3.1 BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL 0.088J BDL BDL .069BJ 0.02J 0.14B BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL 1 Selenium BDL BDL BDL BDL BDL BDL BDL BDL BDL 6 BDL 19 BDL 9.4 BDL BDL BDL BDL 6.3 BDL BDL 6.1B BDL 17 BDL 12 3.5BJ BDL 20 BDL BDL 4.7J BJ BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL 1.5J BDL 2.3J 20 Silver BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL 2.2J BDL 0.84J 1.6J BDL BDL BDL 21 BDL 1.3J BDL BDL BDL BDL BDL 3.2J BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL 20 Notes: Groundwater samples collected on above listed dates and analyzed for Appendix I VOC's and RCRA metals; and 1-4-dioxane by EPA Method 8260D (select ion monitoring (SIM)) starting on November 13, 2018. BDL = below detection limit; NT = not tested VOCs = volatile organic compounds BF = bromoform; CD = carbon disulfide; CB = chlorobenzene; DCB = dichlorobenzene; DCA = dichloroethane; DCE = dichloroethene; VC = vinyl chloride bold and shade denotes above NCGPS data presented in micrograms per liter (ug/l) B = detected in method blank J = estimated result <PQL and >=MDL MW-4 HISTORICAL GROUNDWATER ANALYTICAL RESULTS GASTON COUNTY - CLOSED AUTEN LANDFILL GASTONIA, NORTH CAROLINA Date 4/97 9/97 4/98 9/98 4/99 9/99 5/00 10/00 5/01 12/01 7/02 12/02 5/03 11/03 5/04 11/04 4/05 11/05 5/06 11/06 6/07 11/07 6/08 11/08 6/09 11/09 4/10 11/10 5/11 11/11 5/12 12/12 5/13 12/13 5/14 12/14 5/15 12/15 5/16 11/16 7/17 11/17 5/18 11/18 5/19 11/19 7/20 12/20 8/21 12/21 8/22 12/22 NCGPS Appendix I VOCs Acetone BDL BDL 450 BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL 1.2J 3BJ BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL 2.6J BDL BDL BDL BDL BDL BDL BDL BDL BDL 6,000 Benzene BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL 0.64J 0.43J 0.41J 0.56J BDL 0.39J 0.22J 0.59J 0.28J 0.25J 0.23J 0.23J BDL 0.23J 0.13J BDL BDL BDL 0.25J BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL 1 Bromoform BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL 0.4J 0.42J BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL 4 CD BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL 0.2J BDL BDL BDL BDL 0.25J BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL 700 CB BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL 0.55J 0.5J 0.38J BDL BDL 0.55J 0.42J 0.98J 0.46J 0.79J 0.43J 1 BDL 0.64J 0.45J 0.65J 0.72J 0.58J BDL 0.85J 0.89J 1.1 0.44J 0.5 BDL 0.8J 0.63J 0.7J 1.1 1.6 BDL 0.49J 50 1,4-DCB BDL BDL BDL 9 BDL 6 BDL BDL BDL BDL BDL BDL 1.7 BDL BDL 1.2 BDL 1.3 BDL BDL 0.53J 1.3 0.86J 0.91J BDL BDL BDL 1.3 0.84J 1.2 0.36J BDL 0.47J 0.51J 0.44J 0.79J 0.59J 0.96J 0.45J 1.5 0.8J 1 0.68J 0.92 BDL 1 BDL 1 0.65J 1.3 BDL 0.94J 6 1,1-DCA BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL 0.18J 0.24J 0.16J 0.21J BDL 0.24J BDL 0.19J BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL 6 1,2-DCA 5.1 BDL BDL 24 BDL 7 BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL 0.6 cis-1,2-DCE 8.4 6 BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL 1.2 BDL BDL BDL BDL 0.21J 1.1 0.45J 0.41J BDL 0.58J BDL 0.37J 0.2J BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL 22J BDL BDL 70 1,4-Dioxane NT NT NT NT NT NT NT NT NT NT NT NT NT NT NT NT NT NT NT NT NT NT NT NT NT NT NT NT NT NT NT NT NT NT NT NT NT NT NT NT NT NT NT BDL BDL 18J BDL 14J 13J BDL BDL BDL 3 Toluene BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL 12 BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL 600 VC BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL 0.17J 0.41J 0.28J BDL BDL BDL BDL BDL 0.32J 0.41J 0.14J BDL 0.18J BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL 0.03 EPA 8260 (SIM) 1,4-Dioxane NT NT NT NT NT NT NT NT NT NT NT NT NT NT NT NT NT NT NT NT NT NT NT NT NT NT NT NT NT NT NT NT NT NT NT NT NT NT NT NT NT NT NT 21 8.2 22 3.6 19 17 35 3.8 18 3 RCRA Metals Arsenic BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL 9 6.5 BDL BDL 6.7 BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL 7.6BJ BDL BDL BDL 8.9J BDL 4.8BJ BDL BDL 2.3J 1.8 0.65J BDL BDL 4.1 2.7 3.3 4.1 19 5.1 3.8 1.4J BDL BDL 10 Barium 1500 490 160 2400 BDL BDL BDL BDL BDL 79 65 80 91 200 270 310 120 150 120 220 54 77 62 77 170 160 74 70 70 72 95 72 200 84 120 100 130 70 130 100 55 68 200 71 110 160 480 160 200 82 91 66 700 Cadmium 14 4 BDL 1.7 2 2 2 2 BDL BDL 1 BDL BDL BDL BDL 1.1 3.4 BDL BDL 1.2 1.3J 1.9J BDL 3.3 2.5 6.3 BDL 1.2J BDL 1.3J 1.3J 1.2J 9.8 0.81J 0.6J 1.3J 1.4J 0.9J 1.5 1.2 0.33J 2.3 3.4 1.6 1.6 3.6 5.6 1.5 1.6 1 0.41J 0.28J 2 Chromium 150 44 6 15 BDL 10 BDL BDL BDL BDL BDL BDL BDL 18 26 27 BDL 9.6 5.8 21 3J BDL 3.3 BDL 14 12 2.6J BDL BDL BDL BDL 2.1BJ 17 BDL 3.1J BDL 8.8 1.7J 10 2.2J BDL BDL 14 4.3 6.2 9.8 9.1 2.7BJ BDL BDL BDL BDL 10 Lead 110 32 13 27 BDL 10 BDL BDL BDL BDL BDL BDL BDL 5.2 14 16 3.8 BDL 3.8 8.5 BDL BDL BDL 5.8 18 7.5J BDL BDL BDL 2.6J BDL 2.9J 55 BDL 9BJ 3.2J 7.7J BDL BDL 1.5 0.27J 0.62J 7.7 1.9 3.8 9.1 3.5 1.8 0.94J 0.62J 0.34J 0.34J 15 Mercury BDL BDL BDL 2.1 BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL 0.056J BDL BDL BDL BDL BDL .067J BDL BDL .048BJ .018J .022BJ.016J BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL 1 Selenium BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL 4.8J BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL 20 Silver BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL 1.5BJ BDL 1.4J 0.53J BDL 5.7 BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL 20 Notes: Groundwater samples collected on above listed dates and analyzed for Appendix I VOC's and RCRA metals; and 1-4-dioxane by EPA Method 8260D (select ion monitoring (SIM)) starting on November 13, 2018. BDL = below detection limit; NT = not tested NCGPS = North Carolina Groundwater Protection Standard VOCs = volatile organic compounds; CD = carbon disulfide; CB = chlorobenzene; DCB = dichlorobenzene; DCA =dichloroethane; DCE =dichloroethene; VC = vinyl chloride bold and shade denotes above NCGPS data presented in micrograms per liter (ug/l) B = detected in method blank J = estimated result <PQL and >=MDL MW-5 HISTORICAL GROUNDWATER ANALYTICAL RESULTS GASTON COUNTY - CLOSED AUTEN LANDFILL GASTONIA, NORTH CAROLINA Date 4/97 9/97 4/98 9/98 4/99 9/99 5/00 10/00 5/01 12/01 7/02 12/02 5/03 11/03 5/04 11/04 4/05 11/05 5/06 11/06 6/07 11/07 6/08 11/08 6/09 11/09 4/10 11/10 5/11 11/11 5/12 12/12 5/13 12/13 5/14 12/14 5/15 12/15 5/16 11/16 7/17 11/17 5/18 11/18 5/19 11/19 7/20 12/20 8/21 12/21 8/22 12/22 NCGPS Appendix I VOCs Acetone BDL BDL BDL BDL 29 BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL 2.8J 4BJ BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL 2.3J 3.6J BDL 2J 5.8J 10J 7.4 5.5J BDL BDL BDL BDL BDL BDL BDL 6,000 Benzene 8.2 BDL BDL BDL 8 BDL 9 BDL 6 BDL BDL 3.4 8.5 BDL 4.7 2.4 3.1 1.6 3 2 4 0.69J 3.6 2.4 5 2.9 6.1 3.4 4.5 2.6 2.9 1.4 2.1 2.4 5.1 3.2 3.8 3.4 3.1 2.8 3.4 1.9 1.4 2 5.4 3.7 5.5 4 3.4 2.2 2.6 2.2 1 CD 5.9 9.4 BDL BDL 13 BDL BDL 39 BDL BDL 4.1 BDL 3.9 BDL BDL BDL BDL BDL BDL BDL 0.67J BDL BDL BDL BDL 1.5 BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL 700 CB 8.3 6.1 13 BDL 17 BDL 20 6 22 BDL 3.7 6.7 15 2.1 18 13 9 11 12 15 18 2.3 10 10 12 10 15 18 14 13 14 7 16 12 19 11 13 12 17 12 16 9.4 5.2 8.9 19 15 20 22 17 9.8 15 14 50 CA BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL 0.71J BDL BDL BDL 2.7 1.3J 1.9J 0.47J 1.3J 1.1J 0.8J BDL 0.66J 0.77J 1.5J BDL 0.8J 0.72J BDL BDL BDL0.44J BDL BDL 0.53J 0.44J 0.77J BDL 0.41J BDL 0.47J BDL 3,000 CM BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL 0.48J BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL 3 1,2-DCB 5.8 BDL 7.6 BDL 7 BDL BDL BDL 6.9 BDL BDL 1.4 4.6 BDL 5.1 4.2 4.7 5.5 3 4.9 5 0.56J 2.9 3.1 3 1.1 3.7 4.4 3.1 3.7 3.4 1.5 3.8 2.4 4.7 2.7 4.5 2.8 2.8 1.7 3 1.6 0.71J 1.3 2.8 2.4 3.3 3.2 1.6 1.1 1.4 1.5 20 1,4-DCB 31 16 45 BDL 39 6 48 8 36 2.8 6.2 8.8 30 6.6 25 BDL 26 32 18 22 24 5.2 16 18 30 29 25 23 18 20 17 9.2 17 12 23 17 25 17 14 12 17 10 4.2 7.9 19 16 20 15 9.9 9.5 9.5 10 6 1,1-DCA BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL 1.2 BDL 1.4 BDL 1.1 BDL BDL BDL 0.97J BDL 0.43J 0.35J BDL 0.48J 0.69J 0.46J 0.41J 0.27J 0.34J 0.14J 0.27J BDL 0.47J 0.22J BDL 0.45J 0.39J BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL 6 1,2-DCA 19 15 17 BDL 14 7 7 7 5.2 BDL BDL BDL BDL 3.2 1.3 1.6 BDL BDL 1.7 BDL 1.2 BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL 0.4 cis-1,2-DCE 11 6.7 5.4 BDL 6 BDL BDL 5 BDL BDL BDL BDL 3.2 1.8 1.9 2.1 1.4 1.9 2.1 1.2 2.4 1.2 0.65J 0.85J BDL 0.97J 0.56J 1.5 0.38J 0.42J 0.32J 0.34J 0.37J 0.76J 0.83J BDL 0.65J 0.47J 0.54J 0.85J BDL BDL BDL BDL 0.74J 0.76J 0.51J BDL 0.49J 0.53J 0.45J BDL 70 Styrene BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL 0.17J BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL 70 Toluene BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL 0.32J BDL BDL BDL 0.47J 0.47J BDL BDL BDL BDL BDL BDL BDL 0.36J 0.44J BDL 0.45J 0.3J 0.41J BDL BDL BDL BDL 3.4 0.88J 0.85J 0.65J 0.44J BDL BDL BDL BDL 600 TCE BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL 0.2J BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL 3 VC BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL 1.2 0.41J 1.1 0.71J BDL 0.53J 0.73J BDL 0.55J 0.32J 0.44J 0.22J 0.61J 0.69J 0.73J BDL BDL BDL 0.56J BDL BDL BDL BDL BDL BDL BDL 0.46J BDL BDL BDL BDL BDL 0.03 Xylenes BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL 2.3 BDL 2.3 BDL BDL BDL BDL BDL BDL 0.32J BDL BDL BDL 0.41J BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL 500 EPA 8260 (SIM) 1,4-Dioxane NT NT NT NT NT NT NT NT NT NT NT NT NT NT NT NT NT NT NT NT NT NT NT NT NT NT NT NT NT NT NT NT NT NT NT NT NT NT NT NT NT NT NT BDL BDL BDL NT NT NT NT NT NT 3 RCRA Metals Arsenic BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL 17 9.8 6.5 BDL BDL 6.6 BDL 7.3 5.8 12 4.6J 4.5J 16 5.6J 4.9J BDL 16B 17 23 BDL 16 8J 7.9BJ BDL 2.2J 3.3J 2.7 3 3.3 4.9 2.1 1.3 2.2 2.7 4.1 4 3 2.2 4 3.3 10 Barium 240 510 450 620 BDL 620 BDL BDL BDL 75 97 120 91 180 520 310 300 280 250 320 240 300 180 150 200 320 300 180 220 190 220 160 230 160 220 190 210 160 140 160 170 190 73 130 160 200 170 200 200 220 160 160 700 Cadmium BDL 4 2 1 3 6 2 2 BDL BDL BDL BDL BDL BDL 2.2 2.8 BDL BDL BDL BDL BDL 1.2J BDL 0.64J BDL 2 BDL BDL BDL BDL BDL BDL 1.2J BDL BDL BDL 0.9J BDL 0.12 0.32 BDL 3.8 0.96 0.34J 0.34J 0.13J 0.45J 0.68 0.18J 0.52 0.59 0.15J 2 Chromium BDL 10 3 35 BDL 14 BDL BDL BDL BDL BDL 12 BDL BDL 11 BDL BDL 5.9 BDL BDL 4.3J 6.3 BDL BDL BDL 5.2 BDL BDL BDL BDL BDL 2.1BJ BDL BDL BDL BDL 0.95J BDL 0.81J BDL BDL 2.1J BDL 1.4J BDL BDL BDL BDL BDL BDL BDL BDL 10 Lead 7 28 22 26 23 24 BDL BDL BDL BDL BDL BDL BDL BDL 12 7.4 BDL 10 BDL BDL 2.6J BDL 8.6 8.1 8.1BJ 10 4.5J BDL BDL BDL BDL BDL 49 BDL BDL 7.2J BDL BDL 0.29J 0.49J BDL 1.3 0.8J 0.43J 0.28J BDL BDL 0.3J BDL BDL 1.3 BDL 15 Mercury BDL BDL BDL 1.2 BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL .076J BDL BDL .035BJBDL .076BJ .019J BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL 1 Selenium BDL BDL BDL BDL BDL BDL BDL BDL 36 12 9 15 BDL 14 9.5 BDL BDL BDL 5.2 BDL BDL BDL BDL 14 BDL 5 BDL BDL 18 BDL BDL BDL BDL BDL 3.4J BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL 20 Silver BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL 4.6J BDL 0.65J BDL BDL BDL BDL 18 BDL BDL BDL BDL 0.81J BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL 20 Notes: Groundwater samples collected on above listed dates and analyzed for Appendix I VOC's and RCRA metals; and 1-4-dioxane by EPA Method 8260D (select ion monitoring (SIM)) November 2018 to 2019. BDL = below detection limit; NT = not tested NCGPS = North Carolina Groundwater Protection Standard VOCs = volatile organic compounds; CD = carbon disulfide; CB = chlorobenzene; CA = chloroethane; CM = chloromethane; DCB = dichlorobenzene; DCA = dichloroethane; DCE = dichloroethene; TCE = trichloroethene; VC = vinyl chloride bold and shade denotes above NCGPS data presented in micrograms per liter (ug/l) B = detected in method blank J = estimated result <PQL and >=MDL MW-5A HISTORICAL GROUNDWATER ANALYTICAL RESULTS GASTON COUNTY - CLOSED AUTEN LANDFILL GASTONIA, NORTH CAROLINA Date 10/00 5/01 12/01 7/02 12/02 5/03 11/03 5/04 11/04 4/05 11/05 5/06 11/06 6/07 11/07 6/08 11/08 6/09 11/09 4/10 11/10 5/11 11/11 5/12 12/12 5/13 12/13 5/14 12/14 5/15 12/15 5/16 11/16 7/17 11/17 5/18 11/18 5/19 11/19 7/20 12/20 8/21 12/21 8/22 12/22 NCGPS Appendix I VOCs Acetone BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL 1.9J 2.8BJ BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL 2.9J BDL BDL BDL BDL 6.2J BDL BDL BDL BDL 6,000 Bromoform BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL 0.38J BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL 4 Carbon Disulfide BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL 0.16J BDL BDL BDL BDL 1.6 BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL 700 Chloroform BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL 0.18J BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL 70 Bromoform BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL 3.8 BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL 4 1,4-DCB BDL BDL BDL BDL BDL 1.2 BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL 6 Methyl Iodide BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL 0.51J 0.34J BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL NS EPA 8260 (SIM) 1,4-Dioxane NT NT NT NT NT NT NT NT NT NT NT NT NT NT NT NT NT NT NT NT NT NT NT NT NT NT NT NT NT NT NT NT NT NT NT NT BDL BDL BDL NT NT NT NT NT NT 3 RCRA Metals Arsenic BDL BDL BDL BDL BDL 5.4 BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL 8.7BJ 5.7J BDL BDL BDL 5.6J 5.9BJ BDL BDL BDL 0.26J BDL BDL BDL BDL 0.22J BDL BDL BDL BDL BDL BDL BDL BDL 10 Barium BDL BDL 59 60 100 140 130 140 120 170 110 150 140 160 82 87 76 120 92 140 95 140 85 120 71 150 93 130 110 150 120 130 92 160 85 77 120 130 120 120 140 130 110 120 120 700 Cadmium 2 BDL BDL BDL BDL BDL BDL BDL BDL 1.1 BDL BDL BDL BDL BDL 2.2 BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL 0.6J 0.8 4.2 BDL 0.15J 0.34J 0.14J BDL BDL 0.2J 0.16J 0.18J 0.34J 0.83 0.38J 2 Chromium BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL 0.84J BDL BDL BDL 0.57J BDL BDL BDL BDL BDL BDL BDL BDL 10 Lead BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL 2.6J 5.3 4.2 6BJ 3.1J BDL BDL 4.8J 6.8J BDL BDL 13 BDL 2.8BJ BDL BDL 0.97J 0.15J 1.1 BDL BDL BDL 0.46J BDL BDL BDL BDL BDL BDL BDL BDL 15 Mercury BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL 0.15 BDL BDL BDL BDL .066BJ .058J .073BJ BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL 1 Selenium BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL 7.2BJ BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL 20 Silver BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL 0.81BJ BDL 0.96J BDL BDL 1.2 BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL 20 Notes: Groundwater samples collected on above listed dates and analyzed for Appendix I VOC's and RCRA metals; and 1-4-dioxane by EPA Method 8260D (select ion monitoring (SIM)) November 2018 to 2019. BDL = below detection limit; NT = not tested NCGPS = North Carolina Groundwater Protection Standard VOCs = volatile organic compounds; DCB = dichlorobenzene bold and shade denotes above NCGPS data presented in micrograms per liter (ug/l) B = detected in method blank J = estimated result <PQL and >=MDL rk:table:authistgw.mw5A MW-6 HISTORICAL GROUNDWATER ANALYTICAL RESULTS GASTON COUNTY - CLOSED AUTEN LANDFILL GASTONIA, NORTH CAROLINA Date 10/00 5/01 12/01 7/02 12/02 5/03 11/03 5/04 11/04 4/05 11/05 5/06 11/06 6/07 11/07 6/08 11/08 6/09 11/09 4/10 11/10 5/11 11/11 5/12 12/12 5/13 12/13 5/14 12/14 5/15 12/15 5/16 11/16 7/17 11/17 5/18 11/18 5/19 11/19 7/20 12/20 8/21 12/21 8/22 12/22 NCGPS Appendix I VOCs Carbon Disulfide BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL 1.1 BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL 700 Chloroform BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL 0.42J 0.53J 70 1,1-Dichloroethane BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL 0.18J BDL 0.37J 0.32J 0.35J 0.28J 0.16J 0.19J 0.13J 0.17J BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL 6 cis-1,2-Dichloroethene BDL BDL BDL BDL BDL BDL BDL 2 1.3 BDL BDL BDL BDL BDL 0.59J 0.56J 1.3 2.2 2.7 2.7 2.7 1.7 0.79J 0.78J 0.49J 0.48J 0.73J 0.69J 0.45J 0.19J 0.33J 0.26J BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL 70 2-Hexanone BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL 1.4J BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL 280 Tetrachloroethene 18 6.9 6 3.4 4.6 BDL BDL 4.9 4.1 2.8 3.8 3.5 3.4 BDL 3.2 3.5 4.2 5.8 5.7 5.4 3.4 3.7 3.6 3.2 2.9 3 2.7 1.3 1.3 1.9 1.8 0.78J 1.4 1.3 1.4 1.4 2.4 BDL 0.53J 0.53J 0.47J BDL BDL BDL BDL 0.7 Trichloroethene BDL BDL BDL BDL BDL BDL BDL 1.3 BDL BDL BDL BDL BDL BDL 0.37J 0.46J 0.72J 1.2 1.3 1.3 BDL 0.65J 0.51J 0.43J 0.32J 0.3J 0.32J BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL 3 EPA 8260 (SIM) 1,4-Dioxane NT NT NT NT NT NT NT NT NT NT NT NT NT NT NT NT NT NT NT NT NT NT NT NT NT NT NT NT NT NT NT NT NT NT NT NT BDL BDL BDL NT NT NT NT NT NT 3 RCRA Metals Arsenic 180 BDL 15 54 BDL BDL 21 29 24 BDL 33 22 24 BDL BDL BDL 4.7J BDL BDL BDL BDL 5.4BJ 13 BDL BDL 4.5J BDL 6.4BJ BDL BDL BDL BDL 0.26J BDL BDL BDL 0.29J BDL BDL BDL BDL BDL BDL BDL BDL 10 Barium 4,600 BDL 504 1,720 48 120 820 1,500 1,700 540 1,700 1,300 1,400 65 51 65 210 66 61 84 49 40 73 44 50 47 53 45 43 47 57 62 51 46 45 36 52 BDL 49 42 43 52 39 40 45 700 Cadmium 16 BDL BDL 3 BDL BDL BDL 6 BDL BDL BDL BDL BDL BDL BDL BDL 2.7 1.4J BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL 0.3 0.52 BDL 0.15J 3.7 0.77J 0.43J 0.51 0.59 0.36J BDL 0.19J 0.18J 0.27J 2 Chromium 340 BDL 44 134 BDL BDL 59 130 110 10 120 97 120 4.1J BDL 2.8J 15 3.4J BDL 4.5J BDL BDL 3.3J BDL BDL BDL BDL BDL BDL BDL 1.9J 2J 1.1J BDL BDL BDL 1.9J 1.9J BDL 8.6 BDL BDL 0.68J BDL 1.4J 10 Lead 240 BDL 10 61 BDL BDL 24 41 62 11 60 41 61 8.5 BDL 6.2 19 9.8B 2J 6.7J 2.1BJ BDL BDL BDL BDL 28 9.6J BDL BDL BDL BDL 0.93J 1.6 0.84J BDL 0.56J 2.7 0.6J 0.32J 6.9 4.1 BDL BDL 0.66J 1.4 15 Mercury BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL 0.062J BDL BDL BDL BDL BDL BDL 0.02BJBDL BDL 0.017J BDL BDL BDL BDL BDL BDL BDL BDL 0.1BJ BDL BDL BDL BDL BDL BDL BDL 1 Selenium BDL BDL BDL BDL BDL BDL 10 BDL BDL BDL BDL 7.1 BDL BDL 3.2BJ 0.54J 3.7J 2.6 BDL 7.5BJ BDL BDL BDL 3.7J BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL 20 Silver BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL 1.1J BDL BDL BDL BDL 0.9J BDL BDL BDL BDL BDL BDL 0.4J BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL 20 Notes: Groundwater samples collected on above listed dates and analyzed for Appendix I VOC's and RCRA metals; and 1-4-dioxane by EPA Method 8260D (select ion monitoring (SIM)) November 2018 to 2019. BDL = below detection limit; NT = not tested NCGPS = North Carolina Groundwater Protection Standard VOCs = volatile organic compounds bold and shade denotes above NCGPS data presented in micrograms per liter (ug/l) B = detected in method blank J = estimated result <PQL and >=MDL TW-1 HISTORICAL GROUNDWATER ANALYTICAL RESULTS GASTON COUNTY - CLOSED AUTEN LANDFILL GASTONIA, NORTH CAROLINA Date 5/03 11/03 5/04 11/04 4/05 11/05 5/06 11/06 6/07 11/07 6/08 11/08 6/09 11/09 4/10 11/10 5/11 11/11 5/12 12/12 5/13 12/13 5/14 12/14 5/15 12/15 5/16 11/16 7/17 11/17 5/18 11/18 5/19 11/19 7/20 12/20 8/21 12/21 8/22 NCGPS Appendix I VOCs Tetrachloroethene BDL BDL BDL BDL BDL NT NT NT 0.19J NT NT NT NT NT 0.58J NT NT NT NT NT NT NT BDL BDL BDL NT BDL NT NT NT NT NT BDL BDL BDL BDL BDL BDL NT 0.7 Toluene BDL 170 BDL BDL BDL NT NT NT BDL NT NT NT NT NT BDL NT NT NT NT NT NT NT 0.23J BDL BDL NT BDL NT NT NT NT NT BDL BDL BDL BDL BDL BDL NT 600 EPA 8260 (SIM) 1,4-Dioxane NT NT NT NT NT NT NT NT NT NT NT NT NT NT NT NT NT NT NT NT NT NT NT NT NT NT NT NT NT NT NT NT BDL BDL NT NT NT NT NT 3 RCRA Metals Arsenic BDL 14 BDL 15 BDL NT NT NT 24J NT NT NT NT NT 5.1J NT NT NT NT NT NT NT 30B NT NT NT BDL NT NT NT NT NT BDL 8.1 BDL BDL 1.4J 3.4 NT 10 Barium 180 940 120 980 400 NT NT NT 8,200 NT NT NT NT NT 1,700 NT NT NT NT NT NT NT 2,700 NT NT NT 1,500 NT NT NT NT NT 130 430 140 66 250 270 NT 700 Cadmium BDL BDL BDL BDL BDL NT NT NT 9.8J NT NT NT NT NT BDL NT NT NT NT NT NT NT BDL NT NT NT 0.98J NT NT NT NT NT 2.6 1.4 0.54 0.33J 0.59 2.1 NT 2 Chromium BDL 46 BDL 28 2.2 NT NT NT 240 NT NT NT NT NT 39 NT NT NT NT NT NT NT 100 NT NT NT 39J NT NT NT NT NT 5.6 14 2.9J 3.2 3.2J 10 NT 10 Lead 3.1 60 BDL 370 170 NT NT NT 5,200 NT NT NT NT NT 390 NT NT NT NT NT NT NT 220B NT NT NT 150 NT NT NT NT NT 15 1,100 27 BDL 70 390 NT 15 Mercury BDL BDL BDL BDL BDL NT NT NT 0.071J NT NT NT NT NT BDL NT NT NT NT NT NT NT BDL NT NT NT BDL NT NT NT NT NT BDL BDL BDL BDL BDL BDL NT 1 Silver BDL BDL BDL BDL BDL NT NT NT 8.6BJ NT NT NT NT NT BDL NT NT NT NT NT NT NT BDL NT NT NT BDL NT NT NT NT NT BDL 0.25J BDL BDL BDL BDL NT 20 Selenium BDL 6.9 BDL BDL BDL NT NT NT 25 NT NT NT NT NT 4.8BJ NT NT NT NT NT NT NT BDL NT NT NT BDL NT NT NT NT NT BDL 5.4 1.6J BDL 2.2J 3.6J NT 20 Notes: Groundwater samples collected on above listed dates and analyzed for Appendix I VOC's and RCRA metals; and 1-4-dioxane by EPA Method 8260D (select ion monitoring (SIM)) starting on November 2018 to 2019. BDL = below detection limit; NT = not tested NCGPS = North Carolina Groundwater Protection Standard VOCs = volatile organic compounds bold and shade denotes above NCGPS NT = not tested (TW-1 was dry and unable to be sampled) data presented in micrograms per liter (ug/l) B = detected in method blank J = estimated result <PQL and >=MDL rk:table:authistgw.tw1 TW-2 HISTORICAL GROUNDWATER ANALYTICAL RESULTS GASTON COUNTY - CLOSED AUTEN LANDFILL GASTONIA, NORTH CAROLINA Date 5/03 11/03 5/04 11/04 4/05 11/05 5/06 11/06 6/07 11/07 6/08 11/08 6/09 11/09 4/10 11/10 5/11 11/11 5/12 12/12 5/13 12/13 5/14 12/14 5/15 12/15 5/16 11/16 7/17 11/17 5/18 11/18 5/19 11/19 7/20 12/20 8/21 12/21 8/22 12/22 NCGPS Appendix I VOCs Acetone BDL BDL BDL BDL BDL BDL BDL BDL BDL 2.9BJ BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL 5.3J BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL 6,000 Carbon Disulfide BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL 0.64J BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL 700 Chloroform BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL 0.34J 0.47J 0.65J 0.58J 0.73J BDL 0.55J 0.52J 0.31J 0.47J 0.5J 0.59J 0.67J 0.62 BDL BDL BDL BDL BDL BDL 0.77J 0.43J 70 Chloromethane BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL 0.27J BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL 3 cis-1,2-Dichloroethene BDL BDL BDL BDL BDL BDL BDL BDL BDL 0.59J BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL 70 4-Methyl-2-Pentanone BDL BDL BDL BDL BDL BDL BDL BDL BDL 0.57J BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL 100 Tetrachloroethene 2 BDL 2.7 3.6 2.7 6.2 6.6 7.2 6.4 6.8 4.1 2 4 1.7 1.3 0.63J 1.8 2.1 1.6 0.54J 0.25J 0.53J BDL 0.99J 1.1 1.1 0.62J 0.76J 0.75J 0.73J BDL BDL BDL BDL BDL BDL BDL 0.48J 0.48J BDL 0.7 EPA 8260 (SIM) 1,4-Dioxane NT NT NT NT NT NT NT NT NT NT NT NT NT NT NT NT NT NT NT NT NT NT NT NT NT NT NT NT NT NT NT BDL BDL BDL NT NT NT NT NT NT 3 RCRA Metals Arsenic BDL BDL BDL 7.4 BDL 14 BDL 19 BDL BDL BDL 68 BDL BDL BDL BDL 9.2BJ BDL BDL 8.1J BDL BDL 5.5BJ 4.2J 5.3J BDL 0.38J 0.28J BDL BDL 2 8.1 BDL BDL BDL BDL BDL BDL BDL BDL 10 Barium 210 76 240 1,200 880 1,300 100 2,600 120 220 190 7,000 81 180 110 170 130 120 180 690 110 110 210 120 350 190 200 120 140 170 600 1,300 230 91 64 130 69 71 91 83 700 Cadmium BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL 6.4 BDL BDL BDL BDL BDL BDL 1.3J BDL BDL BDL BDL BDL BDL 9.8J 0.48 3.4 0.42J 0.36J 2.4 1.4 0.8 1.4 0.25J 0.21J 0.18J 0.22J 0.15J BDL 2 Chromium 7.2 BDL 18 66 BDL 83 BDL 180 7.1 12 6.2 490 BDL 5.6 3.7J 3J 4.6J 3.7J 9.5 44B 3.4J 4.8J 9.9 5.7 22 BDL 12 4.4J 6.1 7.7 38 120 12 3.6J 1.3J 4.6BJ BDL BDL 1.7J 2J 10 Lead 7.2 BDL 5.7 31 9.1 30 BDL 58 3.8 BDL 8.9 200 5.8BJ 6.2J 2.2J BDL 6.5J 5.4J 6.2J 18 40 8.5J 3.8BJ 4.9J 10 8.1J 4.2 1 2.2 2.8 17 49 4.1 2.2 BDL 1.3 BDL BDL 0.6J 5.6 15 Mercury BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL 0.073J BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL .054BJ 0.02J BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL 1 Selenium BDL BDL BDL BDL BDL BDL BDL BDL BDL 4.4BJ BDL 44 3.1J 3.5J 5.4BJ BDL 7.9J 3.5BJ BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL 3.9J BDL BDL BDL BDL BDL BDL BDL BDL 20 Silver BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL 23 BDL BDL BDL BDL 1.1J BDL BDL BDL BDL 0.48J BDL BDL BDL BDL BDL BDL BDL BDL 0.37J 1.1J BDL BDL BDL BDL BDL BDL BDL BDL 20 Notes: Groundwater samples collected on above listed dates and analyzed for Appendix I VOC's and RCRA metals; and 1-4-dioxane by EPA Method 8260B (select ion monitoring (SIM)) November 2018 to 2019. BDL = below detection limit; NT = not tested NCGPS = North Carolina Groundwater Protection Standard VOCs = volatile organic compounds bold and shade denotes above NCGPS data presented in micrograms per liter (ug/l) B = detected in method blank J = estimated result <PQL and >=MDL rk:table:authistgw.tw2 TW-3 HISTORICAL GROUNDWATER ANALYTICAL RESULTS GASTON COUNTY - CLOSED AUTEN LANDFILL GASTONIA, NORTH CAROLINA Date 5/03 11/03 5/04 11/04 4/05 11/05 5/06 11/06 6/07 11/07 6/08 11/08 6/09 11/09 4/10 11/10 5/11 11/11 5/12 12/12 5/13 12/13 5/14 12/14 5/15 12/15 5/16 11/16 7/17 11/17 5/18 11/18 5/19 11/19 7/20 12/20 8/21 12/21 8/22 12/22 NCGPS Appendix I VOCs Acetone BDL BDL BDL BDL BDL BDL BDL BDL BDL 6.3BJ BDL BDL NT NT 27 6.8J BDL BDL BDL BDL BDL BDL BDL BDL BDL 2.1J BDL BDL BDL BDL 6.6BJ BDL BDL BDL BDL BDL BDL BDL BDL BDL 6,000 2-Butanone BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL NT NT 6.8J BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL 4,000 Carbon Disulfide BDL BDL BDL BDL BDL 1.5 BDL BDL BDL BDL BDL BDL NT NT BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL 700 Chloroethane BDL BDL BDL BDL BDL BDL BDL BDL BDL 1.1J BDL BDL NT NT BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL 3,000 Chloroform BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL NT NT BDL BDL BDL 0.34J BDL 0.4J 0.47J BDL BDL 0.35J 0.46J 0.47J BDL BDL BDL BDL 0.47J 0.42J BDL BDL BDL BDL BDL 0.42J 0.72J 0.41J 70 1,1-Dichloroethane BDL 1 1.6 1.4 1.1 BDL BDL BDL BDL 0.15J 0.13J 0.15J NT NT 0.22J 0.13J BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL 6 cis-1,2-Dichloroethene 6.8 33 11 6.7 4 BDL BDL BDL BDL BDL BDL BDL NT NT BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL 70 2-Hexanone BDL BDL BDL BDL BDL BDL BDL BDL BDL 0.4J BDL 0.27J NT NT 0.92J BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL 280 Methylene Chloride BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL NT NT BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL 0.53J 5 4-Methyl-2-Pentanone BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL NT NT 0.4J BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL 100 Tetrachloroethene 6 16 10 10 7.9 4 3.7 1.9 BDL 3 2.2 2.1 NT NT 2 0.21J 0.71J 0.96J 1.8 0.66J 1.4 2.5 3.2 2.2 1.9 0.82J 2.3 0.53J BDL BDL BDL BDL 0.95J 0.82J 1 0.82J 0.91J BDL BDL BDL 0.7 Toluene BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL NT NT BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL 1.9 BDL BDL BDL 600 Trichloroethene 3.4 12 4.2 2.7 1.7 BDL BDL BDL BDL BDL BDL BDL NT NT BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL 3.0 EPA 8260 (SIM) 1,4-Dioxane NT NT NT NT NT NT NT NT NT NT NT NT NT NT NT NT NT NT NT NT NT NT NT NT NT NT NT NT NT NT NT BDL BDL BDL NT NT NT NT NT NT 3 RCRA Metals Arsenic BDL BDL BDL BDL 5.3 9 15 11 4.1J BDL 8.3 4.4 NT NT 4.9J 9.1BJ 7.4BJ BDL 11 15 7.2J 6J 5.3BJ 12 12 13J BDL BDL BDL BDL 2.9 1.5 BDL BDL BDL BDL BDL BDL BDL BDL 10 Barium 220 490 210 180 510 500 1,200 800 240 280 560 410 NT NT 620 380 280 310 250 2,300 790 430 330 400 510 560 580 140 660 870 1,100 260 280 130 240 170 260 190 120 89 700 Cadmium BDL BDL BDL 1.4 11 1.4 4.8 3.5 3 2.3 2.8 2.1 NT NT 1.7J 1.3J 9.5 3.9 9.1 14 17 4.5 1.5J 1.4J 2.7 1.8J 1.4 3.9 0.91 3.8 20 24 4.1 5.2 14 2.4 7.7 3.5 2.8 1.3 2 Chromium BDL 11 6.2 5.6 5.3 23 62 46 9.8 1.5 30 20 NT NT 15 11 13 12 12 85B 32 26 12 21 29 61 23 5.3 69 50 73 15 9.7 BDL 4.4J 1.7BJ 1.7J 7.8 3.4J 2.3J 10 Lead BDL BDL BDL 8.2 4.3 13 39 24 5 7 29 21 NT NT 9.2J 8.3BJ 3.8J 6.7J 5.9J BDL BDL 21 10B 27 51 29 15 5 26 33 60 11 6 2 38 1 2.1 78 2.5 3.9 15 Mercury BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL 0.063J NT NT BDL BDL BDL BDL BDL BDL 0.038BJBDL0.099BJ0.025J BDL BDL BDL BDL BDL BDL BDL BDL 0.11BJ BDL 0.1J BDL BDL BDL BDL BDL 1 Selenium BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL 3.4J NT NT BDL BDL 4.8J BDL BDL BDL 3.3J BDL BDL BDL BDL BDL BDL BDL 4.4J 4.4J 1.5J 0.94J BDL BDL BDL BDL BDL BDL BDL BDL 20 Silver BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL 0.43J NT NT BDL BDL 2J BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL 0.26J 0.082J BDL BDL BDL BDL BDL BDL BDL BDL 20 Notes: Groundwater samples collected on above listed dates and analyzed for Appendix I VOC's and RCRA metals; and 1-4-dioxane by EPA Method 8260D (select ion monitoring (SIM)) November 2018 to 2019. BDL = below detection limit; NT = not tested NCGPS = North Carolina Groundwater Protection Standard VOCs = volatile organic compounds bold and shade denotes above NCGPS data presented in micrograms per liter (ug/l) B = detected in method blank J = estimated result <PQL and >=MDL