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HomeMy WebLinkAbout6709_OnslowMSWLF_Phase5MWInstallationRpt_FID1833652_20240404 5400 Glenwood Ave, Suite 400 Raleigh, North Carolina 27612 tel: 919 325-3500 March 29, 2024 Mr. Ervin Lane North Carolina Department of Environmental Quality Division of Waste Management 1646 Mail Service Center Raleigh, North Carolina 27699-1646 Subject: Onslow County Subtitle D Landfill – Phase 5 Expansion Well Installation and Initial Sampling Report Facility Permit Number 6709-MSWLF-1997 Jacksonville, Onslow County, Carolina Dear Mr. Lane: CDM Smith Inc. (CDM Smith), on behalf of Onslow County (County), is submitting this Well Installation and Initial Sampling report for the Onslow County Subtitle D Landfill (Site) – Phase 5 Expansion. Groundwater and landfill gas (LFG) monitoring wells were installed at the Site in accordance with the approved Water Quality and LFG Monitoring Plans to monitor the Phase 5 expansion area. The current approved groundwater monitoring network consists of the following wells: MW-1, -1a, -2, -2a, -4, -5, -6, -7, -8, -8a, and -9. Monitoring wells MW-1 and -1a are the background wells for the Site. Following the installation of the wells, initial baseline groundwater sampling was completed. Field activities and groundwater sampling results are discussed below. Well Installation Groundwater monitoring wells MW-10, -11, and -11a and LFG monitoring wells M-9 and -10 were installed on January 30-31, 2024, by Fishburne Drilling, Inc., at the locations shown on Figure 1 using hollow-stem auger drilling techniques. Split-spoon samples were collected continuously for the first 5 feet followed by 5-foot intervals to the target depth using Standard Penetration Testing to characterize the subsurface lithology. The lithology of the soil samples was classified using the Unified Soil Classification System. Boring logs and well construction records are provided in Appendix A. All drilling equipment and tooling were decontaminated by steam cleaning prior to use and between each groundwater monitoring and LFG well. Groundwater Monitoring Well Installation Monitoring wells MW-10 and -11 were installed to depths of 20 and 17 feet below ground surface (bgs), respectively, so the screen bracketed the water table. MW-11a was installed to a depth of 35 feet bgs. Mr. Ervin Lane March 29, 2024 Page 2 The monitoring wells were constructed using 2-inch Schedule 40 polyvinyl chloride (PVC) riser flush- threaded to 10-feet of 0.010-inch mill slotted Schedule 40 PVC screen. A Number 2 standard sand pack was installed to 2-feet above the screen and a 2-foot hydrated bentonite seal was installed above the sand pack. The remainder of the borehole annulus was sealed with a bentonite-Portland cement grout mixture to land surface. Each well was completed with an above-grade locking steel protective cover, expansion plug, 2-foot by 2-foot concrete pad, identification placard, and a lock. Following installation, the monitoring wells were developed until clear to remove any suspended solids. Well development equipment was decontaminated between each well by washing it in a non-phosphate detergent solution followed by a potable water rinse, then a distilled water rinse. A well construction summary table for the new and existing groundwater monitoring wells is presented in Table 1. Each monitoring well was surveyed to State Plane Coordinates by a North Carolina registered surveyor. LFG Monitoring Well Installation LFG monitoring wells M-9 and -10 were installed to depths of 10 and 8 feet bgs, respectively. LFG monitoring well M-10 was installed at a shallower depth due to groundwater at 8 feet bgs. The monitoring wells were constructed using 2-inch Schedule 40 PVC riser flush-threaded to 5 and 3 feet of 0.010-inch mill slotted Schedule 40 PVC screen, respectively. A Number 2 standard sand pack was installed to 1-foot above the screen and a 1-foot-thick hydrated bentonite seal was installed above the sand pack. The remainder of the borehole annulus was sealed with a bentonite-Portland cement grout mixture to land surface. Each well was completed with an above-grade locking steel protective cover, expansion plug, 2-foot by 2-foot concrete pad, identification placard, and a lock. Groundwater Sampling Groundwater samples were collected from MW-10, -11, and -11a on February 22 and March 7, 2024, using disposable, laboratory decontaminated, bailers. Prior to sampling, groundwater elevations were measured at each new and existing monitoring well and are presented in Table 2. These groundwater elevations were used to construct potentiometric contours as shown on Figure 2. After the depth to groundwater was determined, three well volumes of water were removed from each well prior to sampling to provide fresh formation water within the well water column. Each well volume was measured in the field for pH, conductivity, temperature, turbidity, dissolved oxygen, and oxidation- reduction potential using a YSI-556 multi-parameter water quality meter and a HACH 2100Q turbidity meter. Water quality parameters at the time of sampling are presented in Table 2. Sampling Results Pace Analytical Services, LLC, located in Huntersville, North Carolina, analyzed the groundwater samples for North Carolina Appendix I volatile organic compounds (VOCs), 1,4-dioxane, Appendix I metals, and per- and polyfluorinated substances (PFAS). Note that VOCs and 1,4-dioxane samples were received by the laboratory outside of the required temperature during the February 2024 sampling event and were resampled on March 7, 2024. Mr. Ervin Lane March 29, 2024 Page 3 No VOCs or 1,4-dioxane were detected above the laboratory method detection limits. Chromium and vanadium were detected in samples collected from MW-11a above their respective 15A NCAC 02L .0202 (NC 2L) Groundwater Standards. No other metals were detected above the NC 2L Groundwater Standards. A summary of the sampling results and a complete summary of all detected concentrations from the existing monitoring wells from May 2012 to September 2023 is provided in Table 3. The laboratory data reports are provided in Appendix B. Note that the PFAS sample results are pending and will be submitted at a later date. Per the approved Water Quality Monitoring Plan, the installation and initial sampling of groundwater monitoring wells satisfies the groundwater criteria necessary to obtain the Permit to Operate for the Onslow County Subtitle D Landfill – Phase 5 expansion. Three additional sampling events will be completed within six months of installing the new wells and are estimated to be done in April, May, and June 2024. The LFG monitoring wells will be screened during the quarterly LFG screening event, estimated to be completed in April 2024. If you have any questions or require further explanation, do not hesitate to call me at (919) 325-3586 or by email to farleyjb@cdmsmith.com. Sincerely, Janelle Farley, P.G. CDM Smith Inc. cc: Deana P. Yitbarek, Division of Waste Management Aaron Weispfenning, CDM Smith Inc. Daniel Forbes, CDM Smith Inc. Mathew Colone, CDM Smith Inc. Jaime Harrell, Onslow County Ian Djuric, Onslow County Tables Table 1 Monitoring Well Construction Summary Onslow County Subtitle D Landfill - Phase 5 Expansion Well Installation and Initial Sampling Report 6709-MSWLF-1997 Screen Interval Filter Interval Seal Interval 6709-MSWLF-1997 MW-1 12/17/1997 34.80724 77.54568 Surficial Aquifer 15.0 5.0-15.0 3.5-15.0 2.0-3.5 2.0 6709-MSWLF-1997 MW-1a 12/17/1997 34.80720 77.54570 Surficial Aquifer 24.0 19.0-24.0 17.0-24.0 13.0-17.0 2.0 6709-MSWLF-1997 MW-2 12/18/1997 34.80450 77.54407 Surficial Aquifer 15.0 5.0-15.0 3.0-15.0 1.5-3.0 2.0 6709-MSWLF-1997 MW-2a 12/18/1997 34.80448 77.54405 Surficial Aquifer 24.0 19.0-24.0 15.0-24.0 12.0-15.0 2.0 6709-MSWLF-1997 MW-4 10/30/1998 34.80129 77.54389 Surficial Aquifer 14.0 4.0-14.0 3.0-14.0 1.5-3.0 2.0 6709-MSWLF-1997 MW-4a 10/30/1998 34.80127 77.54392 Surficial Aquifer 25.0 20.0-25.0 18.0-25.0 16.0-18.0 2.0 6709-MSWLF-1997 MW-5 10/30/1998 34.80015 77.54700 Surficial Aquifer 22.0 7.0-22.0 5.0-22.0 3.0-5.0 2.0 6709-MSWLF-1997 MW-6 10/30/1998 34.80182 77.54874 Surficial Aquifer 22.0 7.0-22.0 5.0-22.0 3.0-5.0 2.0 6709-MSWLF-1997 MW-7 4/15/2004 34.80222 77.54879 Surficial Aquifer 17.0 7.0-17.0 5.0-17.0 3.0-5.0 2.0 6709-MSWLF-1997 MW-8 5/30/2008 34.80299 77.54958 Surficial Aquifer 15.0 5.0-15.0 3.0-15.0 1.0-3.0 2.0 6709-MSWLF-1997 MW-8a 5/30/2008 34.80297 77.54961 Surficial Aquifer 23.0 18.0-23.0 16.0-25.0 14.0-16.0 2.0 6709-MSWLF-1997 MW-9 12/19/2016 34.80473 77.54981 Surficial Aquifer 15.0 5.0-15.0 3.0-15.0 1.0-3.0 2.0 6709-MSWLF-1997 MW-10 1/31/2024 34.80242 77.54172 Surficial Aquifer 20.0 10.0-20.0 8.0-20.0 6.0-8.0 2.0 6709-MSWLF-1997 MW-11 1/30/2024 34.80368 77.54026 Surficial Aquifer 17.0 7.0-17.0 5.0-17.0 3.0-5.0 2.0 6709-MSWLF-1997 MW-11a 1/30/2024 34.80368 77.54025 Surficial Aquifer 35.0 25.0-35.0 23.0-35.0 21.0-23.0 2.0 Notes: 1. TOC - Top of Casing 2. bgs - Below Ground Surface Facility Permit Number Depths (feet bgs)Total Depth (feet below TOC) Monitoring Well Diameter (inches) Monitoring Well Code Geology of Screened Interval Completion Date Latitude Longitude Page 1 of 1 March 2024 Table 2 Groundwater Elevations and Water Quality Measurements Onslow County Subtitle D Landfill - Phase 5 Expansion Well Installation and Initial Sampling Report Facility Permit Number 6709-MSWLF-1997 Facility Permit Number Monitoring Well Code TOC Elevation Ground Elevation (AMSL) Depth to Water (feet BTOC) Groundwater Elevation (AMSL) pH (S.U.) Conductivity (µS/cm) Temperature (deg. C) DO (mg/L) Turbidity (NTU) ORP (mV) 6709-MSWLF-1997 MW-1 98.94 96.06 10.04 88.90 6709-MSWLF-1997 MW-1a 98.65 95.99 10.49 88.16 6709-MSWLF-1997 MW-2 95.39 92.75 9.83 85.56 6709-MSWLF-1997 MW-2a 95.40 92.81 10.20 85.20 6709-MSWLF-1997 MW-4 94.40 92.30 6.55 87.85 6709-MSWLF-1997 MW-4a 94.54 92.30 13.78 80.76 6709-MSWLF-1997 MW-5 86.72 84.42 6.18 80.54 6709-MSWLF-1997 MW-6 86.36 83.71 6.51 79.85 6709-MSWLF-1997 MW-7 86.82 83.94 7.08 79.74 6709-MSWLF-1997 MW-8 82.25 79.40 3.58 78.67 6709-MSWLF-1997 MW-8a 81.17 79.40 6.99 74.18 6709-MSWLF-1997 MW-9 86.74 83.74 7.52 79.22 6709-MSWLF-1997 MW-10 100.71 98.05 14.27 86.44 4.73 169 16.1 5.44 3 161.7 6709-MSWLF-1997 MW-11 95.55 92.62 9.69 85.86 4.26 1 15.1 10.55 43 197.0 6709-MSWLF-1997 MW-11a 95.47 92.67 10.28 85.19 4.09 29 16.4 0.17 6 86.2 Notes: 1. MW-10 was installed on January 31, 2024. MW-11 and -11a were installed on January 30, 2024. 2. Groundwater elevations and water quality measurements were collected on February 22, 2024. 3. TOC - Top of Casing 4. AMSL - Above Mean Sea Level 5. BTOC - Below TOC 6. S.U. - Standard Units 7. µS/cm - Microsiemens per centimeter 8. DO - Dissolved Oxygen (mg/L - milligrams per liter) 9. ORP - Oxidation Reduction Potential (mV - millivolt) 10. NTU - Nephelometric Turbidity Units 11. Turbidity recorded at time of sampling. 12. (12) - Water quality measurements were not collected from MW-1 through -9 because they were not required to be sampled. --(12) --(12) --(12) --(12) --(12) --(12) --(12) --(12) --(12) --(12) --(12) --(12) 1 of 1 March 2024 Table 3a Detected Groundwater Constituents - Metals Onslow County Subtitle D Landfill - Phase 5 Expansion Well Installation and Initial Sampling Report Facility Permit Number 6709-MSWLF-1997 Mo n i t o r i n g W e l l C o d e Sa m p l e D a t e An t i m o n y Ar s e n i c Ba r i u m Be r y l l i u m Ca d m i u m Ch r o m i u m Co b a l t Co p p e r Le a d Ni c k e l Se l e n i u m Si l v e r Th a l l i u m Va n a d i u m Zi n c 1 10 700 4 2 10 1 1,000 15 100 20 20 2 7 1,000 MW-1 20-May-15 0.654J 11.1J 5.28J 5.24J 5.78J MW-1 21-Oct-15 3.25J 14.4J 5.37J 3.52J 0.968J 3.86J 7.33J MW-1 3-May-16 7.07J 2.27J 7.44JD 3.26J 25.4 MW-1 30-Aug-16 9.90J 3.14J 22.2 MW-1 dissolved 30-Aug-16 9.22J 4.20J 4.85J MW-1 16-Mar-17 12.7J 0.522J 2.94J 2.99J 3.66J 0.282J 3.08J MW-1 5-Oct-17 6.01J 0.197J 3.78J 2.77J 0.613J MW-1 22-Mar-18 7.77J MW-1 13-Dec-18 7.96J 11.4 MW-1 8-May-19 21.9 0.260J 12.1 1.63J 3.53J 2.53J 9.84J 20.3 MW-1 dissolved 8-May-19 NA NA NA NA NA 1.85J NA NA NA NA NA NA NA MW-1 19-Sep-19 15.0 5.01J 2.67J 4.26J 19.4 MW-1 dissolved 19-Sep-19 NA NA NA NA NA NA NA NA NA NA NA NA NA NA MW-1 2-Apr-20 10.1 7.06J 1.90J 5.26J 8.62J MW-1 dissolved 2-Apr-20 NA NA NA NA NA NA NA NA NA NA NA NA NA NA MW-1 15-Sep-20 15.3 1.88J MW-1 24-Mar-21 5.80J 1.58J 1.62J MW-1 14-Oct-21 11.4 1.87J MW-1 5-Apr-22 11.1 MW-1 10-Nov-22 9.2J MW-1 12-Apr-23 8.3J 1.0J MW-1 14-Sep-23 10 0.51J MW-1a 20-May-15 0.705J 4.18J 2.48J 1.47J 9.50J 12.7 MW-1a 20-Oct-15 1.18J 23.2J 4.94J 3.97J 2.29J 0.968J 2.96J 9.87J MW-1a 3-May-16 7.95J 4.29J 3.46J 11.4D 6.24J 6.44J MW-1a dup 3-May-16 8.41J 6.05J 2.10J 2.74J 6.15J MW-1a 30-Aug-16 0.360J 14.1J 7.00J 4.16J 3.65J 30.0 MW-1a dissolved 30-Aug-16 15.1J 1.60J 9.85J MW-1a 16-Mar-17 9.17J 0.559J 2.16J 3.75J 0.294J 4.82J MW-1a 4-Oct-17 5.00J 0.186J 3.56J 2.73J 0.584J 2.77J MW-1a 21-Mar-18 7.85J 2.68J MW-1a 13-Dec-18 11.6 3.97J 1.77J 2.28J 3.15J 5.91J 66.1 MW-1a dissolved 13-Dec-18 NA NA NA NA NA NA NA NA NA NA NA NA 1.49J NA MW-1a 8-May-19 16.2 0.213J 11.3 3.65J 7.07J 5.94J 15.7 15.0 MW-1a dissolved 8-May-19 NA NA NA NA NA 1.64J NA NA NA NA NA NA 5.04J NA MW-1a 19-Sep-19 2.54J 2.34J 2.96J 19.3 MW-1a dissolved 19-Sep-19 NA NA NA NA NA NA NA NA NA NA NA NA NA 1.96J NA MW-1a 2-Apr-20 9.94J 3.71J 5.82J 13.4 MW-1a dissolved 2-Apr-20 NA NA NA NA NA NA NA NA NA NA NA NA NA 2.34J NA MW-1a 15-Sep-20 14.1 2.11J 2.57J 8.46J MW-1a 24-Mar-21 4.92J 3.19J 1.48J 4.60J 4.73J MW-1a 14-Oct-21 2.79J 3.14J 3.03J 6.32J MW-1a dissolved 14-Oct-21 NA NA NA NA NA NA NA NA NA NA NA NA NA 2.11J NA MW-1a 5-Apr-22 2.90J 2.71J MW-1a 10-Nov-22 11 1.0J MW-1a 12-Apr-23 8.5J 1.9J 3.5J MW-1a 14-Sep-23 19 4.3J 0.59J 12 North Carolina 2L Page 1 of 13 March 2024 Table 3a Detected Groundwater Constituents - Metals Onslow County Subtitle D Landfill - Phase 5 Expansion Well Installation and Initial Sampling Report Facility Permit Number 6709-MSWLF-1997 Mo n i t o r i n g W e l l C o d e Sa m p l e D a t e An t i m o n y Ar s e n i c Ba r i u m Be r y l l i u m Ca d m i u m Ch r o m i u m Co b a l t Co p p e r Le a d Ni c k e l Se l e n i u m Si l v e r Th a l l i u m Va n a d i u m Zi n c 1 10 700 4 2 10 1 1,000 15 100 20 20 2 7 1,000North Carolina 2L MW-2 20-May-15 10.4J 1.78J 1.98J 2.25J 8.82J MW-2 21-Oct-15 0.476J 3.02J 3.93J 1.97J MW-2 3-May-16 12.8 46.5J 3.58J 2.04J 4.33J 7.26JD 10.1J 5.91J MW-2 29-Aug-16 16.4 28.0J 3.83J 1.28J 2.84J 0.126J 9.13J 13.0 MW-2 dissolved 29-Aug-16 8.77J 23.4J 2.52J 1.73J MW-2 16-Mar-17 9.78J 36.0J 4.59J 3.06J 0.254J 11.4J MW-2 4-Oct-17 30.7J 2.57J 1.20J 2.79J 0.452J 7.78J MW-2 21-Mar-18 32.6J 12.2 1.22J 3.62J 7.77J MW-2 13-Dec-18 14.5 7.49J 1.58J 3.01J 5.75J MW-2 dup 13-Dec-18 15.7 7.37J 2.82J 6.14J MW-2 8-May-19 21.7 2.31J 1.88J 3.27J 6.99J MW-2 dup 8-May-19 21.7 2.54J 1.49J 7.13J MW-2 18-Sep-19 31.5 2.34J 2.13J 2.13J 5.06J 2.57J 7.67J 5.09J MW-2 1-Apr-20 24.8 2.94J 5.61J 4.41J MW-2 14-Sep-20 11.7 5.92J 1.76J 6.93J 6.88J MW-2 23-Mar-21 13.4 5.54J MW-2 13-Oct-21 15.2 2.56J 2.40J MW-2 4-Apr-22 12.7 2.75J 1.80J MW-2 dup 4-Apr-22 13.1 3.62J 2.63J MW-2 10-Nov-22 11 4.5J 4.0J MW-2 dup 10-Nov-22 12 5.2J 5.0J MW-2 11-Apr-23 9.6J 4.0J 5.1J MW-2 14-Sep-23 5.6 5.4 2.2J 2.6J MW-2a 20-May-15 0.355J 255 23.2J 6.29J 2.59J 8.73J 61.7 7.40J MW-2a dup 20-May-15 0.422J 261 23.4J 6.22J 2.43J 9.40J 59.8 9.83 MW-2a 21-Oct-15 0.254J 34.1 20.3J 2.70J 1.95J 4.28J 2.53J 4.70J 13.7 MW-2a 3-May-16 71.0 23.5J 7.02J 3.33J 18.6 5.29JD 14.2J 9.44J MW-2a 30-Aug-16 26.5 28.6J 1.98J 1.94J 2.40J 0.163J 2.92J 16.9 MW-2a dissolved 30-Aug-16 21.0 30.3J 1.73J 1.56J 0.141J 2.79J MW-2a dup 30-Aug-16 25.0 28.9J 1.76J 2.31J 0.171J 2.98J 15.9 MW-2a dup dissolved 30-Aug-16 22.0 28.7J 1.71J 1.45J 0.133J 2.84J MW-2a 16-Mar-17 37.2 56.2J 0.195J 0.520J 13.2 2.49J 3.55J 28.5 4.66J 0.460J 18.8J 10.1 MW-2a 4-Oct-17 36.9 28.3J 0.216J 3.01J 25.2 4.17J 3.32J 10.6J MW-2a 22-Mar-18 23.6J 1.63J 2.22J 5.37J 2.70J 7.63J MW-2a 13-Dec-18 16.0 10.6 3.13J 1.42J 3.38J 10.2 12.1 MW-2a dissolved 13-Dec-18 NA NA NA NA NA NA NA NA NA NA NA NA MW-2a 8-May-19 20.9 2.08J 3.14J 4.04J 11.6 6.99J MW-2a dissolved 8-May-19 NA NA NA NA NA NA 2.48J NA NA NA NA NA NA 2.67J NA MW-2a 18-Sep-19 20.5 3.99J 1.79J 6.47J 17.8 11.0 MW-2a 1-Apr-20 10.3 23.1 3.79J 9.95J 7.84J 5.81J MW-2a dup 1-Apr-20 12.0 23.5 4.36J 1.62J 9.37J 11.8 10.9 MW-2a 14-Sep-20 1.31J 28.0 23.5 4.93J 1.56J 2.51J 8.86J 17.2 9.46J MW-2a 23-Mar-21 16.4 1.70J 6.70J 7.19J MW-2a dup 23-Mar-21 16.6 1.40J 6.98J 5.84J MW-2a 13-Oct-21 25.5 1.88J 1.75J 3.98J MW-2a 4-Apr-22 27.2 3.82J 3.24J MW-2a 10-Nov-22 9.8J 4.4J 3.7J 4.9J 9.1J MW-2a 11-Apr-23 25 12 4.0J 5.2J MW-2a 14-Sep-23 42 9.5 5.2 15 8.4 1.7J 8.6 86 Page 2 of 13 March 2024 Table 3a Detected Groundwater Constituents - Metals Onslow County Subtitle D Landfill - Phase 5 Expansion Well Installation and Initial Sampling Report Facility Permit Number 6709-MSWLF-1997 Mo n i t o r i n g W e l l C o d e Sa m p l e D a t e An t i m o n y Ar s e n i c Ba r i u m Be r y l l i u m Ca d m i u m Ch r o m i u m Co b a l t Co p p e r Le a d Ni c k e l Se l e n i u m Si l v e r Th a l l i u m Va n a d i u m Zi n c 1 10 700 4 2 10 1 1,000 15 100 20 20 2 7 1,000North Carolina 2L MW-3 20-May-15 8.18J 9.90J 2.06J 3.70J 2.86J 22.9J 12.5 MW-3 21-Oct-15 1.30J 2.47J 0.944J 3.85J MW-3 3-May-16 1.95J 7.18JD 2.18J 18.8 MW-3 30-Aug-16 23.6J 3.34J 1.11J 1.56J 11.6 MW-3 dissolved 30-Aug-16 2.10J MW-3 16-Mar-17 16.0 63.4J 0.982J 0.614J 59.5 7.89J 18.3 21.3 21.5J 2.10J 0.307J 92.3 69.2 MW-3 5-Oct-17 1.21J 0.236J 3.43J 3.26J 1.12J 0.498J 8.35J MW-3 22-Mar-18 7.95J 1.11J MW-3 13-Dec-18 MW-3 8-May-19 6.28J 0.364J 8.08J 2.31J 4.55J 3.58J 11.8 14.8 MW-3 dissolved 8-May-19 NA NA NA NA NA NA NA NA NA NA NA NA NA MW-3 19-Sep-19 1.83J 0.164J 7.02J 6.01J 4.55 9.38J 24.0 MW-3 dissolved 19-Sep-19 NA NA NA NA NA NA NA NA NA NA NA NA NA NA MW-3 2-Apr-20 1.89J 2.38J 2.17J 2.56 2.67J 5.76J MW-3 dissolved 2-Apr-20 NA NA NA NA NA NA NA NA NA NA NA NA NA NA MW-3 15-Sep-20 2.05 MW-3 23-Mar-21 MW-3 13-Oct-21 3.90 MW-3 dup 13-Oct-21 3.62 MW-4 20-May-15 13.5J 4.93J 3.15J 20.5J 8.24J MW-4 21-Oct-15 0.454J 6.79J 16.3J 4.39J MW-4 3-May-16 11.7J 4.81J 2.26J 9.26JD 9.76J 4.48J MW-4 30-Aug-16 7.14J 1.51J 3.23J 3.63J 19.5 MW-4 dissolved 30-Aug-16 6.83J 6.95J 3.49J MW-4 16-Mar-17 9.11J 11.2J 1.62J 3.92J 0.194J 4.11J MW-4 4-Oct-17 17.2J 3.25J 2.77J 0.503J 1.54J MW-4 22-Mar-18 12.9J 2.26J 1.75J 10.5J MW-4 dissolved 22-Mar-18 NA NA NA NA NA NA NA NA NA NA NA NA NA 8.80J NA MW-4 13-Dec-18 17.2 3.23J 6.70J 5.81J MW-4 dissolved 13-Dec-18 NA NA NA NA NA NA NA NA NA NA NA NA NA 5.57J NA MW-4 8-May-19 33.1 2.44J 1.50J 4.12J 6.30J MW-4 dissolved 8-May-19 NA NA NA NA NA NA 1.44J NA NA NA NA NA NA NA MW-4 18-Sep-19 18.0 3.28J 4.41J MW-4 2-Apr-20 11.8 1.45J 1.94J 11.2 4.78J MW-4 15-Sep-20 11.5 1.79J 1.93J 5.89J MW-4 24-Mar-21 9.97J 2.61J 5.58J 6.32J MW-4 13-Oct-21 45.6 1.62J MW-4 4-Apr-22 41.0 1.77J 2.75J 4.52J MW-4 10-Nov-22 11 4.7J 1.4J MW-4 11-Apr-23 0.39J 5.7J 2.2J 14 MW-4 14-Sep-23 2.6 11 1.7J 0.33J 1.3B,J 10 Page 3 of 13 March 2024 Table 3a Detected Groundwater Constituents - Metals Onslow County Subtitle D Landfill - Phase 5 Expansion Well Installation and Initial Sampling Report Facility Permit Number 6709-MSWLF-1997 Mo n i t o r i n g W e l l C o d e Sa m p l e D a t e An t i m o n y Ar s e n i c Ba r i u m Be r y l l i u m Ca d m i u m Ch r o m i u m Co b a l t Co p p e r Le a d Ni c k e l Se l e n i u m Si l v e r Th a l l i u m Va n a d i u m Zi n c 1 10 700 4 2 10 1 1,000 15 100 20 20 2 7 1,000North Carolina 2L MW-5 20-May-15 37.7J 0.111J 13.8 MW-5 21-Oct-15 26.9J 0.387J 9.29J MW-5 dup 21-Oct-15 12.0 26.4J 8.41J 12.0 MW-5 3-May-16 28.8J 8.27JD 1.50J 13.7 MW-5 30-Aug-16 13.8 25.0J 3.01J 0.146J 9.59J 15.0 MW-5 dissolved 30-Aug-16 31.3J 0.209J 5.30J MW-5 16-Mar-17 33.3J 3.20J 0.383J 3.15J 6.47J MW-5 4-Oct-17 44.1J 0.242J 3.11J 2.22J 4.38J 4.93J 4.53J 0.768J 6.78J 11.4 MW-5 dup 4-Oct-17 43.9J 0.125J 1.50J 3.74J 3.95J 0.693J 2.52J 7.50J MW-5 21-Mar-18 29.3J 5.33J MW-5 dup 21-Mar-18 29.7J 1.15J 5.42J MW-5 13-Dec-18 26.9 MW-5 8-May-19 31.2 2.16J 3.88J 15.8 MW-5 dissolved 8-May-19 NA NA NA NA NA NA 1.80J NA NA NA NA NA NA NA MW-5 18-Sep-19 34.5 2.22J 10.4 8.59J MW-5 dup 18-Sep-19 34.1 2.57J 7.87J 8.38J MW-5 1-Apr-20 25.4 3.55J 4.59J 28.0 5.02J MW-5 14-Sep-20 40.6 0.185J 2.12J 5.62J 8.78J 27.2 10.1 MW-5 dup 14-Sep-20 40.6 0.261J 2.40J 2.38J 9.11J 24.1 56.1 11.7 MW-5 23-Mar-21 15.5 1.43J 5.49J MW-5 13-Oct-21 26.2 MW-5 4-Apr-22 21.4 4.28J MW-5 10-Nov-22 16 1.7J MW-5 11-Apr-23 18 1.2J 2.3J MW-5 dup 11-Apr-23 18 1.8J MW-5 14-Sep-23 1.5J 21 1.3 4.4J MW-5 dup 14-Sep-23 21 1.5 0.16J 3.8J MW-6 20-May-15 14.6J 1.54J 1.10J 3.59J MW-6 21-Oct-15 14.6J 2.48J 2.01J 6.41J 9.95J MW-6 3-May-16 12.4J 2.48J 4.27J 2.31J 8.39JD 4.66J 407 MW-6 30-Aug-16 18.5J 1.66J 1.97J 3.40J 13.2 MW-6 dissolved 30-Aug-16 18.1J 2.50J MW-6 16-Mar-17 8.98J 16.9J 0.123J 5.89J 2.09J 5.06J 0.334J 9.74J 11.6 MW-6 dup 16-Mar-17 12.9 3.18J 3.51J 0.290J 5.73J 7.84J MW-6 5-Oct-17 19.9J 0.225J 3.04J 2.71J 3.59J 4.69J 0.662J 7.31J 12.1 MW-6 dissolved 5-Oct-17 NA NA NA NA NA NA 1.48J NA NA NA NA NA 0.569J 2.75J NA MW-6 22-Mar-18 13.4J 1.60J 3.70J MW-6 13-Dec-18 14.5 1.90J 3.63J MW-6 8-May-19 17.5 0.239J 4.47J 3.84J 8.10J 9.36J 18.9 MW-6 dissolved 8-May-19 NA NA NA NA NA NA NA NA NA NA NA NA 1.45J NA MW-6 19-Sep-19 19.7 2.28J 3.18J 22.6 MW-6 dissolved 19-Sep-19 NA NA NA NA NA NA NA NA NA NA NA NA 1.81J NA MW-6 1-Apr-20 18.5 1.44J 1.76J 2.44J 4.82J MW-6 15-Sep-20 26.6 2.77J 3.24J 4.65J MW-6 24-Mar-21 16.7 1.76J 4.23J 5.39J MW-6 13-Oct-21 24.9 1.77J MW-6 4-Apr-22 18.2 2.23J 8.10J 1.71J MW-6 10-Nov-22 18 2.0J 3.9J MW-6 11-Apr-23 21 2.0J 3.2J MW-6 14-Sep-23 27 1.6J 3.4J Page 4 of 13 March 2024 Table 3a Detected Groundwater Constituents - Metals Onslow County Subtitle D Landfill - Phase 5 Expansion Well Installation and Initial Sampling Report Facility Permit Number 6709-MSWLF-1997 Mo n i t o r i n g W e l l C o d e Sa m p l e D a t e An t i m o n y Ar s e n i c Ba r i u m Be r y l l i u m Ca d m i u m Ch r o m i u m Co b a l t Co p p e r Le a d Ni c k e l Se l e n i u m Si l v e r Th a l l i u m Va n a d i u m Zi n c 1 10 700 4 2 10 1 1,000 15 100 20 20 2 7 1,000North Carolina 2L MW-7 20-May-15 7.48J 43.8J 8.07J 4.21J 3.36J 0.286J 13.1J 14.8 MW-7 21-Oct-15 8.67J 31.7J 3.46J 3.21J 2.80J 0.244J 9.43J 13.5 MW-7 3-May-16 34.6J 1.84J 7.53JD 4.31J 12.7 MW-7 30-Aug-16 0.591J 45.8J 3.57J 4.38J 0.278J 3.54J 19.3 MW-7 dissolved 30-Aug-16 7.59J 31.3J 1.03J 1.90J 3.00J 0.214J 3.52J 4.98J MW-7 16-Mar-17 15.5 77.6J 0.473J 24.7 6.02J 7.75J 10.9J 0.799J 37.1 28.2 MW-7 5-Oct-17 38.6J 0.237J 2.29J 2.01J 3.26J 0.777J 4.05J MW-7 22-Mar-18 41.2J 1.60J 4.25J 4.70J MW-7 13-Dec-18 11.6 51.8 12.5 13.7 3.39J 11.3 12.4 1.87J 19.4 74.0 MW-7 dissolved 13-Dec-18 NA NA NA NA 1.77J NA NA NA NA NA 0.965J NA MW-7 8-May-19 11.6 41.4 0.176J 5.35J 5.33J 5.17J 0.590J 12.1 28.4 MW-7 dissolved 8-May-19 NA NA NA NA NA 3.81J NA NA NA NA NA 0.500J NA MW-7 19-Sep-19 33.9 3.59J 3.85J 0.494J 5.99J 47.3 MW-7 dissolved 19-Sep-19 NA NA NA NA NA NA NA NA NA NA NA 4.42J NA MW-7 2-Apr-20 45.3 1.55J 3.35J 5.78J MW-7 15-Sep-20 40.6 1.80J 4.86J 4.62J MW-7 24-Mar-21 42.2 0.575J 2.73J 19.4 MW-7 14-Oct-21 58.5 1.72J 1.54J 0.427J 5.24J 12.3 MW-7 5-Apr-22 59.1 1.67J 4.06J MW-7 10-Nov-22 56 1.8J 4.2J MW-7 12-Apr-23 78 1.8J 1.4J 6.3J MW-7 14-Sep-23 48 2.2J 2.0J 4.6J 3.4J MW-8 20-May-15 141 0.116J 1.15J 3.45J 21.3 MW-8 21-Oct-15 99.0J 2.91J 11.5 MW-8 3-May-16 12.7 170 0.124J 2.36J 3.24J 4.75J 9.84JD 4.76J 50.7 MW-8 30-Aug-16 9.42J 138 2.69J 3.12J 2.45J 4.47J 6.16J 49.3 MW-8 dissolved 30-Aug-16 110 3.20J 5.78J MW-8 16-Mar-17 9.81J 94.8J 0.184J 0.469J 4.86J 2.90J 3.15J 6.24J 0.757J 0.337J 7.38J 41.4 MW-8 5-Oct-17 0.856J 7.49J 70.7J 0.328J 1.53J 1.34J 4.36J 4.29J 0.694J 1.71J 42.2 MW-8 dissolved 5-Oct-17 NA NA NA NA NA NA NA NA NA NA NA 0.626J NA MW-8 22-Mar-18 102 3.72J 6.08J MW-8 dissolved 22-Mar-18 NA NA NA NA NA NA NA NA NA NA NA NA NA 2.91J NA MW-8 13-Dec-18 13.1 113 5.50J 8.71J 1.76J 6.86J 8.45J 10.0 113 MW-8 dissolved 13-Dec-18 NA NA NA NA NA NA NA NA NA NA NA NA MW-8 8-May-19 82.2 2.33J 4.73J 4.20J 4.52J 7.66J 42.4 MW-8 dissolved 8-May-19 NA NA NA NA NA NA 5.87J NA NA NA NA NA NA NA MW-8 19-Sep-19 94.4 1.77J 4.51J 33.9 MW-8 dissolved 19-Sep-19 NA NA NA NA NA NA NA NA NA NA NA NA NA NA MW-8 2-Apr-20 114 2.94J 2.04J 7.78J MW-8 15-Sep-20 110 2.21J 2.14J 1.90J 2.51J 3.15J 25 MW-8 24-Mar-21 90.2 0.528J MW-8 14-Oct-21 109 2.93J 23.2 MW-8 5-Apr-22 114 1.90J MW-8 10-Nov-22 100 2.9J 3.0J MW-8 12-Apr-23 140 3.9J MW-8 14-Sep-23 1.8J 120 0.16J 2.4J 9.3 0.75J 2.9J 5.4 16.0 Page 5 of 13 March 2024 Table 3a Detected Groundwater Constituents - Metals Onslow County Subtitle D Landfill - Phase 5 Expansion Well Installation and Initial Sampling Report Facility Permit Number 6709-MSWLF-1997 Mo n i t o r i n g W e l l C o d e Sa m p l e D a t e An t i m o n y Ar s e n i c Ba r i u m Be r y l l i u m Ca d m i u m Ch r o m i u m Co b a l t Co p p e r Le a d Ni c k e l Se l e n i u m Si l v e r Th a l l i u m Va n a d i u m Zi n c 1 10 700 4 2 10 1 1,000 15 100 20 20 2 7 1,000North Carolina 2L MW-8a 20-May-15 51.8J 0.217J 1.55J 5.79J MW-8a 21-Oct-15 41.7J 0.219J 6.02J MW-8a 3-May-16 61.4J 0.174J 1.53J 6.90JD 5.24J MW-8a 30-Aug-16 69.0J 0.244J 2.06J 3.55J 17.8 MW-8a dissolved 30-Aug-16 57.0J 0.137J 2.26J MW-8a 16-Mar-17 69.3J 0.393J 0.740J 2.67J 4.42J 0.317J 4.36J 9.38J MW-8a 5-Oct-17 78.9J 0.456J 3.46J 3.44J 0.679J 6.69J MW-8a 22-Mar-18 87.9J 0.358J 3.16J MW-8a dissolved 22-Mar-18 NA NA NA NA NA NA NA NA NA NA NA NA NA NA MW-8a 13-Dec-18 89.9 0.362J 3.17J 1.72J 4.37J MW-8a dissolved 13-Dec-18 NA NA NA NA NA NA NA NA NA NA NA NA NA NA MW-8a 8-May-19 89.0 0.450J 3.48J 1.42J 2.77J 7.04J 5.68J MW-8a dissolved 8-May-19 NA NA NA NA NA NA 5.87J NA NA NA NA NA NA NA MW-8a 2-Apr-20 94.7 0.327J 2.28J 3.44J 5.25I MW-8a dissolved 2-Apr-20 NA NA NA NA NA NA NA NA NA NA NA NA NA NA MW-8a 15-Sep-20 95.8 0.372J 3.10J 2.42J 5.30J MW-8a 24-Mar-21 85.5 0.219J 1.91J 3.06J 8.06J MW-8a 13-Oct-21 77.5 0.206J 2.07J 1.79J 2.96J 5.06J MW-8a 5-Apr-22 94.4 0.260J 1.93J MW-8a 10-Nov-22 78 3.0J 2.3J MW-8a 12-Apr-23 110 1.9J 3.9J 4.8J MW-8a 14-Sep-23 89 0.38J 1.6J 1.3J 3.3J 7.7J MW-9 21-Dec-16 0.39J 4.7 37 0.37J 0.87BL,J 7.3 11 2.8J 4.6 15 0.71J 0.085J 0.26J 12 18 MW-9 16-Mar-17 27.1 112 1.71 0.898J 40.7 23.7 10.6 21.6 36.3J 1.28J 0.343J 61.7 64.6 MW-9 5-Oct-17 10.9 68.3J 1.06 25.3 6.87J 9.21J 10.8 15.0J 1.33J 0.617J 41.3 20.1 MW-9 dissolved 5-Oct-17 NA NA NA NA 2.81J NA NA NA NA NA 0.660J NA MW-9 22-Mar-18 52.9J 0.351J 7.70J 8.62J 2.66J 6.01J MW-9 dissolved 22-Mar-18 NA NA NA NA NA NA 6.66J NA NA NA NA NA NA 2.38J NA MW-9 13-Dec-18 54.9 0.331J 6.76J 8.68J 1.86J 5.39J 11.3 11.0 7.97J MW-9 dissolved 13-Dec-18 NA NA NA NA NA NA 8.07J NA NA NA NA NA NA NA MW-9 8-May-19 9.70J 71.0 1.05 9.25J 6.22J 6.55J 7.97J 2.42 22.9 14.0 MW-9 dissolved 8-May-19 NA NA NA NA NA NA 8.31J NA NA NA NA NA NA NA MW-9 19-Sep-19 57.7 0.610J 1.54J 5.88J 5.43J 6.11J 8.42J 9.43J 25.1 MW-9 dissolved 19-Sep-19 NA NA NA NA NA NA 4.73J NA NA NA NA NA NA NA MW-9 2-Apr-20 57.2 0.260J 3.04J 2.76J 1.75J 4.73J 6.47J MW-9 dissolved 2-Apr-20 NA NA NA NA NA NA 2.82J NA NA NA NA NA NA NA MW-9 15-Sep-20 68.3 0.437J 1.69J 4.49J MW-9 24-Mar-21 47.5 0.165J 2.16J 2.72J MW-9 14-Oct-21 42.8 0.246J 1.56J 2.88J 4.51J MW-9 dissolved 14-Oct-21 NA NA NA NA NA NA NA NA NA NA NA NA NA NA MW-9 5-Apr-22 44.9 2.30J 1.67J 7.68J MW-9 dissolved 5-Apr-22 NA NA NA NA NA NA NA NA NA NA NA NA NA NA MW-9 10-Nov-22 49 MW-9 12-Apr-23 46 1.1J MW-9 14-Sep-23 41 0.21J 2.5J Page 6 of 13 March 2024 Table 3a Detected Groundwater Constituents - Metals Onslow County Subtitle D Landfill - Phase 5 Expansion Well Installation and Initial Sampling Report Facility Permit Number 6709-MSWLF-1997 Mo n i t o r i n g W e l l C o d e Sa m p l e D a t e An t i m o n y Ar s e n i c Ba r i u m Be r y l l i u m Ca d m i u m Ch r o m i u m Co b a l t Co p p e r Le a d Ni c k e l Se l e n i u m Si l v e r Th a l l i u m Va n a d i u m Zi n c 1 10 700 4 2 10 1 1,000 15 100 20 20 2 7 1,000North Carolina 2L MW-10 22-Feb-24 73.6 MW-11 22-Feb-24 22.4 MW-11a 22-Feb-24 20.9 19.4 7.6 6.0 9.0 8.0 48.2 Notes: 1. All units are in micrograms per liter (parts per billion). 2. ** - Indicates samples were filtered 3. dup - Duplicate Sample 4. MW-9 was installed on December 19, 2016. 5. MW-3 was abandoned on March 14, 2022, and MW-10, -11, and -11a were installed on January 30-31, 2024, as part of the Phase 5 Expansion. 6. J - Indicates the analytical result is an estimated concentration between the method detection limit and the method reporting limit. 8. R - Indicates that the analytical result is less than the Solid Waste Section Limit but greater than the laboratory reporting limit. 9. D - Indicates that the sample was analyzed at dilution. 10. Dissolved metals samples were collected to evaluate the influence of turbidity on total metal concentrations. 11. NA - Not Analyzed 12. Dissolved metals were not analyzed for the September 2023 sampling event due to laboratory error. - Concentration exceeds 15A NCAC 02L .0202 (North Carolina 2L). - Indicates the result is below the detection limit. 7. BL - Indicates that the amount detected in the method blank was greater than the method detection limit. Page 7 of 13 March 2024 Table 3b Detected Groundwater Constituents - Volatile Organic Compounds Onslow County Subtitle D Landfill - Phase 5 Expansion Well Installation and Initial Sampling Report Facility Permit Number 6709-MSWLF-1997 Mo n i t o r W e l l C o d e Sa m p l e D a t e Ac e t o n e Be n z e n e Br o m o f o r m Ca r b o n D i s u l f i d e ci s - 1 , 2 - D i c h l o r o e t h e n e Di b r o m o c h l o r o m e t h a n e Me t h y l e n e C h l o r i d e Tr i c h l o r o e t h e n e 6,000 1 4 700 70 0.4 5 3 MW-1 20-May-15 MW-1 21-Oct-15 MW-1 3-May-16 MW-1 30-Aug-16 MW-1 16-Mar-17 MW-1 5-Oct-17 MW-1 22-Mar-18 MW-1 13-Dec-18 MW-1 8-May-19 MW-1 19-Sep-19 MW-1 2-Apr-20 MW-1 15-Sep-20 MW-1 24-Mar-21 MW-1 14-Oct-21 MW-1 5-Apr-22 MW-1 10-Nov-22 MW-1 12-Apr-23 MW-1 14-Sep-23 MW-1a 20-May-15 MW-1a 20-Oct-15 0.43J MW-1a 3-May-16 MW-1a dup 3-May-16 MW-1a 30-Aug-16 MW-1a 16-Mar-17 MW-1a 4-Oct-17 MW-1a 21-Mar-18 MW-1a 13-Dec-18 MW-1a 8-May-19 MW-1a 19-Sep-19 MW-1a 2-Apr-20 MW-1a 15-Sep-20 MW-1a 24-Mar-21 MW-1a 14-Oct-21 MW-1a 5-Apr-22 MW-1a 10-Nov-22 2.7 MW-1a 12-Apr-23 MW-1a 14-Sep-23 8.8J North Carolina 2L Page 8 of 13 March 2024 Table 3b Detected Groundwater Constituents - Volatile Organic Compounds Onslow County Subtitle D Landfill - Phase 5 Expansion Well Installation and Initial Sampling Report Facility Permit Number 6709-MSWLF-1997 Mo n i t o r W e l l C o d e Sa m p l e D a t e Ac e t o n e Be n z e n e Br o m o f o r m Ca r b o n D i s u l f i d e ci s - 1 , 2 - D i c h l o r o e t h e n e Di b r o m o c h l o r o m e t h a n e Me t h y l e n e C h l o r i d e Tr i c h l o r o e t h e n e 6,000 1 4 700 70 0.4 5 3North Carolina 2L MW-2 20-May-15 46J MW-2 21-Oct-15 2.6J MW-2 3-May-16 0.40J MW-2 29-Aug-16 MW-2 16-Mar-17 0.47J MW-2 4-Oct-17 MW-2 21-Mar-18 MW-2 13-Dec-18 MW-2 dup 13-Dec-18 MW-2 8-May-19 14J MW-2 dup 8-May-19 14J MW-2 18-Sep-19 MW-2 1-Apr-20 MW-2 14-Sep-20 MW-2 23-Mar-21 MW-2 13-Oct-21 MW-2 4-Apr-22 MW-2 dup 4-Apr-22 MW-2 9-Nov-22 3.8 MW-2 dup 9-Nov-22 3.3 MW-2 11-Apr-23 MW-2 14-Sep-23 4.1J MW-2a 20-May-15 MW-2a dup 20-May-15 MW-2a 21-Oct-15 MW-2a 3-May-16 MW-2a 30-Aug-16 MW-2a dup 30-Aug-16 MW-2a 16-Mar-17 MW-2a 4-Oct-17 MW-2a 22-Mar-18 MW-2a 13-Dec-18 MW-2a 8-May-19 MW-2a 18-Sep-19 MW-2a 1-Apr-20 MW-2a dup 1-Apr-20 MW-2a 14-Sep-20 MW-2a 23-Mar-21 MW-2a dup 23-Mar-21 MW-2a 13-Oct-21 MW-2a 4-Apr-22 0.43J MW-2a 10-Nov-22 4.7 24 MW-2a 11-Apr-23 MW-2a 14-Sep-23 4.4J Page 9 of 13 March 2024 Table 3b Detected Groundwater Constituents - Volatile Organic Compounds Onslow County Subtitle D Landfill - Phase 5 Expansion Well Installation and Initial Sampling Report Facility Permit Number 6709-MSWLF-1997 Mo n i t o r W e l l C o d e Sa m p l e D a t e Ac e t o n e Be n z e n e Br o m o f o r m Ca r b o n D i s u l f i d e ci s - 1 , 2 - D i c h l o r o e t h e n e Di b r o m o c h l o r o m e t h a n e Me t h y l e n e C h l o r i d e Tr i c h l o r o e t h e n e 6,000 1 4 700 70 0.4 5 3North Carolina 2L MW-3 20-May-15 MW-3 21-Oct-15 MW-3 3-May-16 MW-3 30-Aug-16 MW-3 16-Mar-17 MW-3 5-Oct-17 MW-3 22-Mar-18 MW-3 13-Dec-18 MW-3 8-May-19 MW-3 19-Sep-19 MW-3 2-Apr-20 MW-3 15-Sep-20 MW-3 23-Mar-21 MW-3 13-Oct-21 MW-3 dup 13-Oct-21 MW-4 20-May-15 MW-4 21-Oct-15 MW-4 3-May-16 MW-4 30-Aug-16 MW-4 16-Mar-17 MW-4 4-Oct-17 MW-4 22-Mar-18 MW-4 13-Dec-18 MW-4 8-May-19 MW-4 18-Sep-19 MW-4 2-Apr-20 MW-4 15-Sep-20 MW-4 24-Mar-21 MW-4 13-Oct-21 MW-4 4-Apr-22 MW-4 9-Nov-22 MW-4 11-Apr-23 MW-4 14-Sep-23 Page 10 of 13 March 2024 Table 3b Detected Groundwater Constituents - Volatile Organic Compounds Onslow County Subtitle D Landfill - Phase 5 Expansion Well Installation and Initial Sampling Report Facility Permit Number 6709-MSWLF-1997 Mo n i t o r W e l l C o d e Sa m p l e D a t e Ac e t o n e Be n z e n e Br o m o f o r m Ca r b o n D i s u l f i d e ci s - 1 , 2 - D i c h l o r o e t h e n e Di b r o m o c h l o r o m e t h a n e Me t h y l e n e C h l o r i d e Tr i c h l o r o e t h e n e 6,000 1 4 700 70 0.4 5 3North Carolina 2L MW-5 20-May-15 MW-5 21-Oct-15 MW-5 dup 21-Oct-15 MW-5 3-May-16 MW-5 30-Aug-16 MW-5 16-Mar-17 MW-5 4-Oct-17 MW-5 dup 4-Oct-17 13J MW-5 21-Mar-18 MW-5 dup 21-Mar-18 MW-5 13-Dec-18 MW-5 8-May-19 MW-5 18-Sep-19 MW-5 dup 18-Sep-19 MW-5 1-Apr-20 MW-5 14-Sep-20 MW-5 dup 14-Sep-20 0.93J 1.1 MW-5 23-Mar-21 MW-5 13-Oct-21 MW-5 4-Apr-22 MW-5 9-Nov-22 1.2 11 MW-5 11-Apr-23 MW-5 dup 11-Apr-23 MW-5 14-Sep-23 MW-6 20-May-15 MW-6 21-Oct-15 MW-6 3-May-16 MW-6 30-Aug-16 MW-6 16-Mar-17 MW-6 dup 16-Mar-17 MW-6 5-Oct-17 MW-6 22-Mar-18 MW-6 13-Dec-18 MW-6 8-May-19 MW-6 19-Sep-19 MW-6 1-Apr-20 MW-6 15-Sep-20 MW-6 24-Mar-21 MW-6 13-Oct-21 MW-6 4-Apr-22 MW-6 10-Nov-22 2.0 MW-6 11-Apr-23 MW-6 14-Sep-23 Page 11 of 13 March 2024 Table 3b Detected Groundwater Constituents - Volatile Organic Compounds Onslow County Subtitle D Landfill - Phase 5 Expansion Well Installation and Initial Sampling Report Facility Permit Number 6709-MSWLF-1997 Mo n i t o r W e l l C o d e Sa m p l e D a t e Ac e t o n e Be n z e n e Br o m o f o r m Ca r b o n D i s u l f i d e ci s - 1 , 2 - D i c h l o r o e t h e n e Di b r o m o c h l o r o m e t h a n e Me t h y l e n e C h l o r i d e Tr i c h l o r o e t h e n e 6,000 1 4 700 70 0.4 5 3North Carolina 2L MW-7 20-May-15 MW-7 21-Oct-15 MW-7 3-May-16 MW-7 30-Aug-16 MW-7 16-Mar-17 MW-7 5-Oct-17 MW-7 22-Mar-18 MW-7 13-Dec-18 MW-7 8-May-19 MW-7 19-Sep-19 MW-7 2-Apr-20 MW-7 15-Sep-20 MW-7 24-Mar-21 MW-7 14-Oct-21 MW-7 5-Apr-22 MW-7 10-Nov-22 MW-7 12-Apr-23 MW-7 14-Sep-23 MW-8 20-May-15 MW-8 21-Oct-15 MW-8 3-May-16 MW-8 30-Aug-16 MW-8 16-Mar-17 MW-8 5-Oct-17 MW-8 22-Mar-18 MW-8 13-Dec-18 MW-8 8-May-19 MW-8 19-Sep-19 MW-8 2-Apr-20 MW-8 15-Sep-20 MW-8 24-Mar-21 MW-8 14-Oct-21 MW-8 5-Apr-22 MW-8 10-Nov-22 MW-8 12-Apr-23 MW-8 14-Sep-23 Page 12 of 13 March 2024 Table 3b Detected Groundwater Constituents - Volatile Organic Compounds Onslow County Subtitle D Landfill - Phase 5 Expansion Well Installation and Initial Sampling Report Facility Permit Number 6709-MSWLF-1997 Mo n i t o r W e l l C o d e Sa m p l e D a t e Ac e t o n e Be n z e n e Br o m o f o r m Ca r b o n D i s u l f i d e ci s - 1 , 2 - D i c h l o r o e t h e n e Di b r o m o c h l o r o m e t h a n e Me t h y l e n e C h l o r i d e Tr i c h l o r o e t h e n e 6,000 1 4 700 70 0.4 5 3North Carolina 2L MW-8a 20-May-15 MW-8a 21-Oct-15 MW-8a 3-May-16 MW-8a 30-Aug-16 MW-8a 16-Mar-17 MW-8a 5-Oct-17 MW-8a 22-Mar-18 MW-8a 13-Dec-18 MW-8a 8-May-19 MW-8a 19-Sep-19 MW-8a 2-Apr-20 MW-8a 15-Sep-20 MW-8a 24-Mar-21 MW-8a 13-Oct-21 MW-8a 5-Apr-22 MW-8a 10-Nov-22 4.3 MW-8a 12-Apr-23 MW-8a 14-Sep-23 5.0J MW-9 21-Dec-16 MW-9 16-Mar-17 MW-9 5-Oct-17 MW-9 22-Mar-18 MW-9 13-Dec-18 MW-9 8-May-19 MW-9 19-Sep-19 10J MW-9 2-Apr-20 MW-9 15-Sep-20 39 MW-9 24-Mar-21 MW-9 14-Oct-21 MW-9 5-Apr-22 MW-9 10-Nov-22 MW-9 12-Apr-23 16J MW-9 14-Sep-23 17 MW-10 7-Mar-24 MW-11 7-Mar-24 MW-11a 7-Mar-24 Notes: 1. All units are in micrograms per liter (parts per billion). 2. dup - Duplicate sample 3. MW-9 was installed on December 19, 2016. 4. MW-3 was abandoned on March 14, 2022, and MW-10, -11, and -11a were installed on January 30-31, 2024, as part of the Phase 5 Expansion. 5. J - Indicates the analytical result is an estimated concentration between the method detection limit and the method reporting limit. 6. R - Indicates that the analytical result is less than the Solid Waste Section Limit but greater than the laboratory reporting limit. - Concentration exceeds 15A NCAC 02L .0202 (North Carolina 2L). - Indicates the result is below the detection limit. Page 13 of 13 March 2024 Figures Appendix A Boring Logs and Well Construction Records Project:Start Date:1/31/2024 Project No.:End Date:1/31/2024 Logged By:Total Depth:20' Location Code:Surface Casing Diameter/Depth:None Location:Well Casing Diameter/Depth:2" PVC to 10' Driller:Screen Diameter/Depth/Slot:2" PVC: 10'-20', 0.01" Drilling Rig/Method: CME-55/Hollow-Stem Auger Water Level (1/31/2024):11.75 ft BGS Depth (feet) Unified Soil Classification System Recovery (percent) SPT (blows per 6 inches) Notes: 1. BGS - Below Ground Surface 2. PVC - Polyvinyl Chloride 3. SPT - Standard Penetration Testing 21 Boring terminated at 20 feet. 16 17 18 19 20 11 Fishburne Drilling Inc. Formation Description Well Construction Permanent Above-Grade Completion with Expansion Cap 1 2 3 4 5 6 7 9 10 2" S c h e d u l e 4 0 P V C R i s e r SP #2 S a n d F i l t e r P a c k Bentonite Seal Bentonite Seal Po r t l a n d C e m e n t Po r t l a n d C e m e n t 12 13 14 15 CL 67 1-2-2-3 SAND, fine- to medium-grained, dark brown and red, very loose to loose, dry 75 Jacksonville, North Carolina MW-10 Boring Log Onslow County Subtitle D Phase 5 Expansion 272586 Logen Weber MW-10 83 1-1-1-1 CLAY, gray and light blue, very soft to soft, wet 2-3-3-3 SAND, fine- to medium-grained, dark brown, loose, dry 75 2-5-5-4 SAND, fine- to -medium grained, light brown, loose to medium, dry to wet 67 3-4-5-6 SAND, fine- to medium-grained, light brown, loose, wet #2 S a n d F i l t e r P a c k 8 2' ' S c h e d u l e 40 P V C S c r e e n 1 of 4 MW-10 Project:Start Date:1/30/2024 Project No.:End Date:1/30/2024 Logged By:Total Depth:17' Location Code:Surface Casing Diameter/Depth:None Location:Well Casing Diameter/Depth:2" PVC to 7' Driller:Screen Diameter/Depth/Slot:2" PVC: 7'-17', 0.01" Drilling Rig/Method: CME-55/Hollow-Stem Auger Water Level (1/31/2024):6.48 ft BGS Depth (feet) Unified Soil Classification System Recovery (percent) SPT (blows per 6 inches) Notes: 1. BGS - Below Ground Surface 2. PVC - Polyvinyl Chloride 3. SPT - Standard Penetration Testing Jacksonville, North Carolina #2 S a n d F i l t e r P a c k #2 S a n d F i l t e r P a c k Bentonite SealBentonite Seal Po r t l a n d Ce m e n t Po r t l a n d Ce m e n t SW SP Fishburne Drilling Inc. Formation Description Well Construction Permanent Above-Grade Completion with Expansion Cap 75 MW-11 Boring Log Onslow County Subtitle D Phase 5 Expansion 272586 Logen Weber MW-11 1 75 1-1-2-1 SAND, fine-grained, light brown, very loose, dry 2 3 75 2-3-3-2 SAND, fine-grained, dark brown and red, loose, dry to wet 4 5 6 7 67 8-12-16-24 SAND, fine- to medium-grained, dark brown, medium, wet 8 9 10 11 12 13 14 15 16 17 18 Boring terminated at 17 feet. 5-7-8-13 SAND, fine- to medium-grained, light brown, medium, wet 2" S c h e d u l e 4 0 P V C R i s e r 2'' S c h e d u l e 40 P V C S c r e e n 2 of 4 MW-11 Project:Start Date:1/30/2024 Project No.:End Date:1/30/2024 Logged By:Total Depth:35' Location Code:Surface Casing Diameter/Depth:None Location:Well Casing Diameter/Depth:2" PVC to 25' Driller:Screen Diameter/Depth/Slot:2" PVC: 25'-35', 0.01" Drilling Rig/Method: CME-55/Hollow-Stem Auger Water Level (1/31/2024):7.31 ft BGS Depth (feet) Unified Soil Classification System Recovery (percent) SPT (blows per 6 inches) Notes: 1. BGS - Below Ground Surface 2. PVC - Polyvinyl Chloride 3. SPT - Standard Penetration Testing 4. WH - Weight of Hammer 36 Boring terminated at 35 feet. 34 35 SP CL 30 31 26 27 21 28 29 22 23 24 25 14 32 33 4 5 6 12 13 SP SW 75 2-3-3-2 15 16 17 18 19 20 7 8 9 10 11 MW-11A Boring Log Onslow County Subtitle D Phase 5 Expansion 272586 Logen Weber MW-11A Jacksonville, North Carolina Fishburne Drilling Inc. Formation Description 75 1-1-2-1 SAND, fine- to medium-grained, light brown, very loose, dry Well Construction Permanent Above-Grade Completion with Expansion Cap 1 2 3 2" S c h e d u l e 4 0 P V C R i s e r 67 CLAY, trace gravel, light brown and gray, very soft, wet 75 5-7-8-13 SAND, fine- to medium-grained, light brown, medium, wet 58 2-4-2-5 SAND, fine- to medium-grained, trace gravel, light brown, loose, wet Bentonite SealBentonite Seal #2 S a n d F i l t e r P a c k #2 S a n d F i l t e r P a c k Po r t l a n d C e m e n t Po r t l a n d C e m e n t SAND, fine-grained, dark brown and red, loose, dry 67 8-12-16-24 SAND, fine- to medium-grained, dark brown, medium, dry to wet 5-5-6-6 SAND, fine- to medium-grained, trace gravel, light brown, medium, wet 83 3-6-4-3 SAND, fine- to medium-grained, trace gravel, light brown and gray, loose to medium, wet 100 WH-WH-WH-WH 2'' S c h e d u l e 40 P V C S c r e e n 3 of 4 MW-11A Project:Start Date:1/31/2024 Project No.:End Date:1/31/2024 Logged By:Total Depth:10' Location Code:Surface Casing Diameter/Depth:None Location:Well Casing Diameter/Depth:2" PVC to 5' Driller:Screen Diameter/Depth/Slot:2" PVC: 5'-10', 0.01" Drilling Rig/Method: CME-55/Hollow-Stem Auger Depth (feet) Unified Soil Classification System Recovery (percent) SPT (blows per 6 inches) Notes: 1. PVC - Polyvinyl Chloride 2. SPT - Standard Penetration Testing Project:Start Date:1/30/2024 Project No.:End Date:1/30/2024 Logged By:Total Depth:8' Location Code:Surface Casing Diameter/Depth:None Location:Well Casing Diameter/Depth:2" PVC to 5' Driller:Screen Diameter/Depth/Slot:2" PVC: 5'-8', 0.01" Drilling Rig/Method: CME-55/Hollow-Stem Auger Depth (feet) Unified Soil Classification System Recovery (percent) SPT (blows per 6 inches) Notes: 1. PVC - Polyvinyl Chloride 2. SPT - Standard Penetration Testing 9 Boring terminated at 8 feet. 67 8-12-16-24 SAND, fine- to medium-grained, dark brown, medium, dry to wet8 Formation Description Well Construction Permanent Above-Grade Completion with Expansion Cap 1 SW 75 1-1-2-1 SAND, fine-grained, light brown, very loose, dry Portland Cement 2" S c h e d u l e 4 0 P V C Ri s e r Portland Cement2 3 75 2-3-3-2 SAND, fine-grained, dark brown and red, loose, dry 4 Bentonite Seal Bentonite Seal 5 #2 S a n d F i l t e r P a c k #2 S a n d F i l t e r P a c k 6 7 SP M-10 Boring Log Onslow County Subtitle D Phase 5 Expansion 272586 Logen Weber M-10 Jacksonville, North Carolina Fishburne Drilling Inc. 3 4 5 Well Construction Permanent Above-Grade Completion with Expansion Cap 1 M-9 Boring Log Onslow County Subtitle D Phase 5 Expansion 272586 Logen Weber M-9 Jacksonville, North Carolina 2 SP SAND, fine- to medium-grained, light brown, loose to medium, dry to wet 6 7 8 9 10 Fishburne Drilling Inc. Formation Description 11 Bentonite Seal Bentonite Seal Portland Cement Portland Cement 2" S c h e d u l e 4 0 P V C R i s e r Boring terminated at 10 feet. #2 S a n d F i l t e r P a c k #2 S a n d F i l t e r P a c k 67 1-2-2-3 SAND, fine- to medium-grained, dark brown and red, very loose to loose, dry 75 2-3-3-3 SAND, fine- to medium-grained, dark brown, loose, dry 75 2-5-5-4 2' ' S c h e d u l e 40 P V C Sc r e e n 2'' S c h e d u l e 40 P V C 4 of 4 M-9 and -10 Appendix B Laboratory Analytical Data #=CL# March 04, 2024 LIMS USE: FR - MATHEW COLONE LIMS OBJECT ID: 92715119 92715119 Project: Pace Project No.: RE: Mathew Colone CDM Smith Inc. - Raleigh 5400 Glenwood Avenue Suite 400 Raleigh, NC 27612 ONSLOW COUNTY-PHASE 5 Dear Mathew Colone: Enclosed are the analytical results for sample(s) received by the laboratory on February 23, 2024. The results relate only to the samples included in this report. Results reported herein conform to the applicable TNI/NELAC Standards and the laboratory's Quality Manual, where applicable, unless otherwise noted in the body of the report. The test results provided in this final report were generated by each of the following laboratories within the Pace Network: • Pace Analytical Services - Asheville If you have any questions concerning this report, please feel free to contact me. Sincerely, Matthew Brainard matthew.brainard@pacelabs.com Project Manager 704-977-0942 Enclosures cc:Janelle Farley, CDM Smith REPORT OF LABORATORY ANALYSIS This report shall not be reproduced, except in full, without the written consent of Pace Analytical Services, LLC. Pace Analytical Services, LLC 9800 Kincey Ave. Suite 100 Huntersville, NC 28078 (704)875-9092 Page 1 of 13 #=CP# CERTIFICATIONS Pace Project No.: Project: 92715119 ONSLOW COUNTY-PHASE 5 Pace Analytical Services Asheville 2225 Riverside Drive, Asheville, NC 28804 Florida/NELAP Certification #: E87648 North Carolina Drinking Water Certification #: 37712 North Carolina Wastewater Certification #: 40 South Carolina Laboratory ID: 99030 South Carolina Certification #: 99030001 Virginia/VELAP Certification #: 460222 REPORT OF LABORATORY ANALYSIS This report shall not be reproduced, except in full, without the written consent of Pace Analytical Services, LLC. Pace Analytical Services, LLC 9800 Kincey Ave. Suite 100 Huntersville, NC 28078 (704)875-9092 Page 2 of 13 #=SA# SAMPLE ANALYTE COUNT Pace Project No.: Project: 92715119 ONSLOW COUNTY-PHASE 5 Lab ID Sample ID Method Analytes Reported LaboratoryAnalysts 92715119001 MW-10 EPA 6010D 15 PASI-ASBW 92715119002 MW-11 EPA 6010D 15 PASI-ASBW 92715119003 MW-11A EPA 6010D 15 PASI-ASBW PASI-A = Pace Analytical Services - Asheville REPORT OF LABORATORY ANALYSIS This report shall not be reproduced, except in full, without the written consent of Pace Analytical Services, LLC. Pace Analytical Services, LLC 9800 Kincey Ave. Suite 100 Huntersville, NC 28078 (704)875-9092 Page 3 of 13 #=AR# ANALYTICAL RESULTS Pace Project No.: Project: 92715119 ONSLOW COUNTY-PHASE 5 Sample:MW-10 Lab ID:92715119001 Collected:02/22/24 12:30 Received:02/23/24 13:08 Matrix:Water Parameters Results Units DF Prepared Analyzed CAS No.QualReport Limit Analytical Method: EPA 6010D Preparation Method: EPA 3010A Pace Analytical Services - Asheville 6010 MET ICP Antimony ND ug/L 02/29/24 12:13 7440-36-002/26/24 12:155.0 1 Arsenic ND ug/L 02/28/24 16:53 7440-38-202/26/24 12:1510.0 1 Barium 73.6 ug/L 02/28/24 16:53 7440-39-302/26/24 12:155.0 1 Beryllium ND ug/L 02/28/24 16:53 7440-41-702/26/24 12:151.0 1 Cadmium ND ug/L 02/28/24 16:53 7440-43-902/26/24 12:151.0 1 Chromium ND ug/L 02/28/24 16:53 7440-47-302/26/24 12:155.0 1 Cobalt ND ug/L 02/28/24 16:53 7440-48-402/26/24 12:155.0 1 Copper ND ug/L 02/28/24 16:53 7440-50-802/26/24 12:155.0 1 Lead ND ug/L 02/28/24 16:53 7439-92-102/26/24 12:155.0 1 Nickel ND ug/L 02/28/24 16:53 7440-02-002/26/24 12:155.0 1 Selenium ND ug/L 02/28/24 16:53 7782-49-202/26/24 12:1510.0 1 Silver ND ug/L 02/28/24 16:53 7440-22-402/26/24 12:155.0 1 Thallium ND ug/L 02/28/24 16:53 7440-28-002/26/24 12:1510.0 1 Vanadium ND ug/L 02/28/24 16:53 7440-62-202/26/24 12:155.0 1 Zinc ND ug/L 02/28/24 16:53 7440-66-602/26/24 12:1510.0 1 REPORT OF LABORATORY ANALYSIS This report shall not be reproduced, except in full, without the written consent of Pace Analytical Services, LLC.Date: 03/04/2024 10:08 AM Pace Analytical Services, LLC 9800 Kincey Ave. Suite 100 Huntersville, NC 28078 (704)875-9092 Page 4 of 13 #=AR# ANALYTICAL RESULTS Pace Project No.: Project: 92715119 ONSLOW COUNTY-PHASE 5 Sample:MW-11 Lab ID:92715119002 Collected:02/22/24 15:25 Received:02/23/24 13:08 Matrix:Water Parameters Results Units DF Prepared Analyzed CAS No.QualReport Limit Analytical Method: EPA 6010D Preparation Method: EPA 3010A Pace Analytical Services - Asheville 6010 MET ICP Antimony ND ug/L 02/29/24 12:16 7440-36-002/26/24 12:155.0 1 Arsenic ND ug/L 02/28/24 16:56 7440-38-202/26/24 12:1510.0 1 Barium 22.4 ug/L 02/28/24 16:56 7440-39-302/26/24 12:155.0 1 Beryllium ND ug/L 02/28/24 16:56 7440-41-702/26/24 12:151.0 1 Cadmium ND ug/L 02/28/24 16:56 7440-43-902/26/24 12:151.0 1 Chromium ND ug/L 02/28/24 16:56 7440-47-302/26/24 12:155.0 1 Cobalt ND ug/L 02/28/24 16:56 7440-48-402/26/24 12:155.0 1 Copper ND ug/L 02/28/24 16:56 7440-50-802/26/24 12:155.0 1 Lead ND ug/L 02/28/24 16:56 7439-92-102/26/24 12:155.0 1 Nickel ND ug/L 02/28/24 16:56 7440-02-002/26/24 12:155.0 1 Selenium ND ug/L 02/28/24 16:56 7782-49-202/26/24 12:1510.0 1 Silver ND ug/L 02/28/24 16:56 7440-22-402/26/24 12:155.0 1 Thallium ND ug/L 02/28/24 16:56 7440-28-002/26/24 12:1510.0 1 Vanadium ND ug/L 02/28/24 16:56 7440-62-202/26/24 12:155.0 1 Zinc ND ug/L 02/28/24 16:56 7440-66-602/26/24 12:1510.0 1 REPORT OF LABORATORY ANALYSIS This report shall not be reproduced, except in full, without the written consent of Pace Analytical Services, LLC.Date: 03/04/2024 10:08 AM Pace Analytical Services, LLC 9800 Kincey Ave. Suite 100 Huntersville, NC 28078 (704)875-9092 Page 5 of 13 #=AR# ANALYTICAL RESULTS Pace Project No.: Project: 92715119 ONSLOW COUNTY-PHASE 5 Sample:MW-11A Lab ID:92715119003 Collected:02/22/24 15:40 Received:02/23/24 13:08 Matrix:Water Parameters Results Units DF Prepared Analyzed CAS No.QualReport Limit Analytical Method: EPA 6010D Preparation Method: EPA 3010A Pace Analytical Services - Asheville 6010 MET ICP Antimony ND ug/L 02/29/24 12:18 7440-36-002/26/24 12:155.0 1 Arsenic ND ug/L 02/28/24 16:59 7440-38-202/26/24 12:1510.0 1 Barium 20.9 ug/L 02/28/24 16:59 7440-39-302/26/24 12:155.0 1 Beryllium ND ug/L 02/28/24 16:59 7440-41-702/26/24 12:151.0 1 Cadmium ND ug/L 02/28/24 16:59 7440-43-902/26/24 12:151.0 1 Chromium 19.4 ug/L 02/28/24 16:59 7440-47-302/26/24 12:155.0 1 Cobalt ND ug/L 02/28/24 16:59 7440-48-402/26/24 12:155.0 1 Copper 7.6 ug/L 02/28/24 16:59 7440-50-802/26/24 12:155.0 1 Lead 6.0 ug/L 02/28/24 16:59 7439-92-102/26/24 12:155.0 1 Nickel 9.0 ug/L 02/28/24 16:59 7440-02-002/26/24 12:155.0 1 Selenium ND ug/L 02/28/24 16:59 7782-49-202/26/24 12:1510.0 1 Silver ND ug/L 02/28/24 16:59 7440-22-402/26/24 12:155.0 1 Thallium ND ug/L 02/28/24 16:59 7440-28-002/26/24 12:1510.0 1 Vanadium 8.0 ug/L 02/28/24 16:59 7440-62-202/26/24 12:155.0 1 Zinc 48.2 ug/L 02/28/24 16:59 7440-66-602/26/24 12:1510.0 1 REPORT OF LABORATORY ANALYSIS This report shall not be reproduced, except in full, without the written consent of Pace Analytical Services, LLC.Date: 03/04/2024 10:08 AM Pace Analytical Services, LLC 9800 Kincey Ave. Suite 100 Huntersville, NC 28078 (704)875-9092 Page 6 of 13 #=QC# QUALITY CONTROL DATA Pace Project No.: Project: 92715119 ONSLOW COUNTY-PHASE 5 Results presented on this page are in the units indicated by the "Units" column except where an alternate unit is presented to the right of the result. QC Batch: QC Batch Method: Analysis Method: Analysis Description: 834916 EPA 3010A EPA 6010D 6010 MET Laboratory:Pace Analytical Services - Asheville Associated Lab Samples:92715119001, 92715119002, 92715119003 Parameter Units Blank Result Reporting Limit Qualifiers METHOD BLANK:4313487 Associated Lab Samples:92715119001, 92715119002, 92715119003 Matrix:Water Analyzed Antimony ug/L ND 5.0 02/28/24 16:05 Arsenic ug/L ND 10.0 02/28/24 16:05 Barium ug/L ND 5.0 02/28/24 16:05 Beryllium ug/L ND 1.0 02/28/24 16:05 Cadmium ug/L ND 1.0 02/28/24 16:05 Chromium ug/L ND 5.0 02/28/24 16:05 Cobalt ug/L ND 5.0 02/28/24 16:05 Copper ug/L ND 5.0 02/28/24 16:05 Lead ug/L ND 5.0 02/28/24 16:05 Nickel ug/L ND 5.0 02/28/24 16:05 Selenium ug/L ND 10.0 02/28/24 16:05 Silver ug/L ND 5.0 02/28/24 16:05 Thallium ug/L ND 10.0 02/28/24 16:05 Vanadium ug/L ND 5.0 02/28/24 16:05 Zinc ug/L ND 10.0 02/28/24 16:05 Parameter Units LCS Result % Rec Limits Qualifiers% RecConc. 4313488LABORATORY CONTROL SAMPLE: LCSSpike Antimony ug/L 506500 101 80-120 Arsenic ug/L 495500 99 80-120 Barium ug/L 514500 103 80-120 Beryllium ug/L 487500 97 80-120 Cadmium ug/L 493500 99 80-120 Chromium ug/L 495500 99 80-120 Cobalt ug/L 495500 99 80-120 Copper ug/L 499500 100 80-120 Lead ug/L 497500 99 80-120 Nickel ug/L 495500 99 80-120 Selenium ug/L 485500 97 80-120 Silver ug/L 245250 98 80-120 Thallium ug/L 489500 98 80-120 Vanadium ug/L 493500 99 80-120 Zinc ug/L 490500 98 80-120 REPORT OF LABORATORY ANALYSIS This report shall not be reproduced, except in full, without the written consent of Pace Analytical Services, LLC.Date: 03/04/2024 10:08 AM Pace Analytical Services, LLC 9800 Kincey Ave. Suite 100 Huntersville, NC 28078 (704)875-9092 Page 7 of 13 #=QC# QUALITY CONTROL DATA Pace Project No.: Project: 92715119 ONSLOW COUNTY-PHASE 5 Results presented on this page are in the units indicated by the "Units" column except where an alternate unit is presented to the right of the result. Parameter Units MS Result % Rec Limits Qual% RecConc. 4313549MATRIX SPIKE & MATRIX SPIKE DUPLICATE: MSSpike Result 92714974002 4313550 MSD Result MSD % Rec RPD MSDMS Spike Conc. Antimony ug/L 500 108 75-125107 1500ND538534 Arsenic ug/L 500 104 75-125104 1500ND521518 Barium ug/L 500 113 75-125103 950019.6 582 533 Beryllium ug/L 500 105 75-125104 1500ND524518 Cadmium ug/L 500 104 75-125103 1500ND518513 Chromium ug/L 500 104 75-125103 1500ND521516 Cobalt ug/L 500 104 75-125103 1500ND520514 Copper ug/L 500 104 75-125101 2500201719704 Lead ug/L 500 104 75-125103 15006.7 526 521 Nickel ug/L 500 103 75-125102 1500ND519514 Selenium ug/L 500 109 75-125107 1500ND543537 Silver ug/L 250 104 75-125103 1250ND260257 Thallium ug/L 500 100 75-12599 1500ND502498 Vanadium ug/L 500 103 75-125102 1500ND517512 Zinc ug/L 500 105 75-125103 250086.3 609 599 REPORT OF LABORATORY ANALYSIS This report shall not be reproduced, except in full, without the written consent of Pace Analytical Services, LLC.Date: 03/04/2024 10:08 AM Pace Analytical Services, LLC 9800 Kincey Ave. Suite 100 Huntersville, NC 28078 (704)875-9092 Page 8 of 13 #=QL# QUALIFIERS Pace Project No.: Project: 92715119 ONSLOW COUNTY-PHASE 5 DEFINITIONS DF - Dilution Factor, if reported, represents the factor applied to the reported data due to dilution of the sample aliquot. ND - Not Detected at or above adjusted reporting limit. TNTC - Too Numerous To Count J - Estimated concentration above the adjusted method detection limit and below the adjusted reporting limit. MDL - Adjusted Method Detection Limit. PQL - Practical Quantitation Limit. RL - Reporting Limit - The lowest concentration value that meets project requirements for quantitative data with known precision and bias for a specific analyte in a specific matrix. S - Surrogate 1,2-Diphenylhydrazine decomposes to and cannot be separated from Azobenzene using Method 8270. The result for each analyte is a combined concentration. Consistent with EPA guidelines, unrounded data are displayed and have been used to calculate % recovery and RPD values. LCS(D) - Laboratory Control Sample (Duplicate) MS(D) - Matrix Spike (Duplicate) DUP - Sample Duplicate RPD - Relative Percent Difference NC - Not Calculable. SG - Silica Gel - Clean-Up U - Indicates the compound was analyzed for, but not detected. Acid preservation may not be appropriate for 2 Chloroethylvinyl ether. A separate vial preserved to a pH of 4-5 is recommended in SW846 Chapter 4 for the analysis of Acrolein and Acrylonitrile by EPA Method 8260. N-Nitrosodiphenylamine decomposes and cannot be separated from Diphenylamine using Method 8270. The result reported for each analyte is a combined concentration. Reported results are not rounded until the final step prior to reporting. Therefore, calculated parameters that are typically reported as "Total" may vary slightly from the sum of the reported component parameters. Pace Analytical is TNI accredited. Contact your Pace PM for the current list of accredited analytes. TNI - The NELAC Institute. REPORT OF LABORATORY ANALYSIS This report shall not be reproduced, except in full, without the written consent of Pace Analytical Services, LLC.Date: 03/04/2024 10:08 AM Pace Analytical Services, LLC 9800 Kincey Ave. Suite 100 Huntersville, NC 28078 (704)875-9092 Page 9 of 13 #=CR# QUALITY CONTROL DATA CROSS REFERENCE TABLE Pace Project No.: Project: 92715119 ONSLOW COUNTY-PHASE 5 Lab ID Sample ID QC Batch Method QC Batch Analytical Method Analytical Batch 92715119001 834916 835008MW-10 EPA 3010A EPA 6010D 92715119002 834916 835008MW-11 EPA 3010A EPA 6010D 92715119003 834916 835008MW-11A EPA 3010A EPA 6010D REPORT OF LABORATORY ANALYSIS This report shall not be reproduced, except in full, without the written consent of Pace Analytical Services, LLC.Date: 03/04/2024 10:08 AM Pace Analytical Services, LLC 9800 Kincey Ave. Suite 100 Huntersville, NC 28078 (704)875-9092 Page 10 of 13 Page 11 of 13 Page 12 of 13 Page 13 of 13 #=CL# March 19, 2024 LIMS USE: FR - MATHEW COLONE LIMS OBJECT ID: 92717897 92717897 Project: Pace Project No.: RE: Mathew Colone CDM Smith Inc. - Raleigh 5400 Glenwood Avenue Suite 400 Raleigh, NC 27612 Onslow-Phase 5 (resample) Dear Mathew Colone: Enclosed are the analytical results for sample(s) received by the laboratory on March 08, 2024. The results relate only to the samples included in this report. Results reported herein conform to the applicable TNI/NELAC Standards and the laboratory's Quality Manual, where applicable, unless otherwise noted in the body of the report. The test results provided in this final report were generated by each of the following laboratories within the Pace Network: • Pace Analytical Services - Charlotte If you have any questions concerning this report, please feel free to contact me. Sincerely, Matthew Brainard matthew.brainard@pacelabs.com Project Manager 704-977-0942 Enclosures cc:Janelle Farley, CDM Smith REPORT OF LABORATORY ANALYSIS This report shall not be reproduced, except in full, without the written consent of Pace Analytical Services, LLC. Pace Analytical Services, LLC 9800 Kincey Ave. Suite 100 Huntersville, NC 28078 (704)875-9092 Page 1 of 22 #=CP# CERTIFICATIONS Pace Project No.: Project: 92717897 Onslow-Phase 5 (resample) Pace Analytical Services Charlotte South Carolina Laboratory ID: 99006 9800 Kincey Ave. Ste 100, Huntersville, NC 28078 North Carolina Drinking Water Certification #: 37706 North Carolina Field Services Certification #: 5342 North Carolina Wastewater Certification #: 12 South Carolina Laboratory ID: 99006 South Carolina Certification #: 99006001 South Carolina Drinking Water Cert. #: 99006003 Florida/NELAP Certification #: E87627 Kentucky UST Certification #: 84 Louisiana DoH Drinking Water #: LA029 Virginia/VELAP Certification #: 460221 REPORT OF LABORATORY ANALYSIS This report shall not be reproduced, except in full, without the written consent of Pace Analytical Services, LLC. Pace Analytical Services, LLC 9800 Kincey Ave. Suite 100 Huntersville, NC 28078 (704)875-9092 Page 2 of 22 #=SA# SAMPLE ANALYTE COUNT Pace Project No.: Project: 92717897 Onslow-Phase 5 (resample) Lab ID Sample ID Method Analytes Reported LaboratoryAnalysts 92717897001 MW-10 EPA 8260D 50 PASI-CLMB EPA 8260D Mod.3 PASI-CLMB 92717897002 MW-11 EPA 8260D 50 PASI-CLMB EPA 8260D Mod.3 PASI-CLMB 92717897003 MW-11A EPA 8260D 50 PASI-CLMB EPA 8260D Mod.3 PASI-CLMB 92717897004 TRIP BLANK EPA 8260D 50 PASI-CLMB PASI-C = Pace Analytical Services - Charlotte REPORT OF LABORATORY ANALYSIS This report shall not be reproduced, except in full, without the written consent of Pace Analytical Services, LLC. Pace Analytical Services, LLC 9800 Kincey Ave. Suite 100 Huntersville, NC 28078 (704)875-9092 Page 3 of 22 #=AR# ANALYTICAL RESULTS Pace Project No.: Project: 92717897 Onslow-Phase 5 (resample) Sample:MW-10 Lab ID:92717897001 Collected:03/07/24 10:58 Received:03/08/24 10:54 Matrix:Water Parameters Results Units DF Prepared Analyzed CAS No.QualReport Limit Analytical Method: EPA 8260D Pace Analytical Services - Charlotte 8260D MSV Low Level Landfill Acetone ND ug/L 03/15/24 04:36 67-64-125.0 1 Acrylonitrile ND ug/L 03/15/24 04:36 107-13-110.0 1 Benzene ND ug/L 03/15/24 04:36 71-43-21.0 1 Bromochloromethane ND ug/L 03/15/24 04:36 74-97-51.0 1 Bromodichloromethane ND ug/L 03/15/24 04:36 75-27-41.0 1 Bromoform ND ug/L 03/15/24 04:36 75-25-21.0 1 Bromomethane ND ug/L 03/15/24 04:36 74-83-9 v22.0 1 2-Butanone (MEK)ND ug/L 03/15/24 04:36 78-93-35.0 1 Carbon disulfide ND ug/L 03/15/24 04:36 75-15-02.0 1 Carbon tetrachloride ND ug/L 03/15/24 04:36 56-23-51.0 1 Chlorobenzene ND ug/L 03/15/24 04:36 108-90-71.0 1 Chloroethane ND ug/L 03/15/24 04:36 75-00-3 v21.0 1 Chloroform ND ug/L 03/15/24 04:36 67-66-31.0 1 Chloromethane ND ug/L 03/15/24 04:36 74-87-31.0 1 Dibromochloromethane ND ug/L 03/15/24 04:36 124-48-11.0 1 Dibromomethane ND ug/L 03/15/24 04:36 74-95-31.0 1 1,2-Dichlorobenzene ND ug/L 03/15/24 04:36 95-50-11.0 1 1,4-Dichlorobenzene ND ug/L 03/15/24 04:36 106-46-71.0 1 trans-1,4-Dichloro-2-butene ND ug/L 03/15/24 04:36 110-57-61.0 1 1,1-Dichloroethane ND ug/L 03/15/24 04:36 75-34-31.0 1 1,2-Dichloroethane ND ug/L 03/15/24 04:36 107-06-21.0 1 1,1-Dichloroethene ND ug/L 03/15/24 04:36 75-35-41.0 1 cis-1,2-Dichloroethene ND ug/L 03/15/24 04:36 156-59-21.0 1 trans-1,2-Dichloroethene ND ug/L 03/15/24 04:36 156-60-51.0 1 1,2-Dichloropropane ND ug/L 03/15/24 04:36 78-87-51.0 1 cis-1,3-Dichloropropene ND ug/L 03/15/24 04:36 10061-01-51.0 1 trans-1,3-Dichloropropene ND ug/L 03/15/24 04:36 10061-02-61.0 1 Ethylbenzene ND ug/L 03/15/24 04:36 100-41-41.0 1 2-Hexanone ND ug/L 03/15/24 04:36 591-78-65.0 1 Iodomethane ND ug/L 03/15/24 04:36 74-88-420.0 1 Methylene Chloride ND ug/L 03/15/24 04:36 75-09-25.0 1 4-Methyl-2-pentanone (MIBK)ND ug/L 03/15/24 04:36 108-10-15.0 1 Styrene ND ug/L 03/15/24 04:36 100-42-51.0 1 1,1,1,2-Tetrachloroethane ND ug/L 03/15/24 04:36 630-20-61.0 1 1,1,2,2-Tetrachloroethane ND ug/L 03/15/24 04:36 79-34-51.0 1 Tetrachloroethene ND ug/L 03/15/24 04:36 127-18-41.0 1 Toluene ND ug/L 03/15/24 04:36 108-88-31.0 1 1,1,1-Trichloroethane ND ug/L 03/15/24 04:36 71-55-61.0 1 1,1,2-Trichloroethane ND ug/L 03/15/24 04:36 79-00-51.0 1 Trichloroethene ND ug/L 03/15/24 04:36 79-01-61.0 1 Trichlorofluoromethane ND ug/L 03/15/24 04:36 75-69-41.0 1 1,2,3-Trichloropropane ND ug/L 03/15/24 04:36 96-18-41.0 1 Vinyl acetate ND ug/L 03/15/24 04:36 108-05-42.0 1 Vinyl chloride ND ug/L 03/15/24 04:36 75-01-41.0 1 Xylene (Total)ND ug/L 03/15/24 04:36 1330-20-71.0 1 m&p-Xylene ND ug/L 03/15/24 04:36 179601-23-12.0 1 REPORT OF LABORATORY ANALYSIS This report shall not be reproduced, except in full, without the written consent of Pace Analytical Services, LLC.Date: 03/19/2024 12:26 PM Pace Analytical Services, LLC 9800 Kincey Ave. Suite 100 Huntersville, NC 28078 (704)875-9092 Page 4 of 22 #=AR# ANALYTICAL RESULTS Pace Project No.: Project: 92717897 Onslow-Phase 5 (resample) Sample:MW-10 Lab ID:92717897001 Collected:03/07/24 10:58 Received:03/08/24 10:54 Matrix:Water Parameters Results Units DF Prepared Analyzed CAS No.QualReport Limit Analytical Method: EPA 8260D Pace Analytical Services - Charlotte 8260D MSV Low Level Landfill o-Xylene ND ug/L 03/15/24 04:36 95-47-61.0 1 Surrogates 4-Bromofluorobenzene (S)98 %03/15/24 04:36 460-00-470-130 1 1,2-Dichloroethane-d4 (S)89 %03/15/24 04:36 17060-07-070-130 1 Toluene-d8 (S)102 %03/15/24 04:36 2037-26-570-130 1 Analytical Method: EPA 8260D Mod. Pace Analytical Services - Charlotte 8260D MSV SIM 1,4-Dioxane (p-Dioxane)ND ug/L 03/12/24 23:54 123-91-12.0 1 Surrogates 1,2-Dichloroethane-d4 (S)102 %03/12/24 23:54 17060-07-067-130 1 Toluene-d8 (S)101 %03/12/24 23:54 2037-26-570-130 1 REPORT OF LABORATORY ANALYSIS This report shall not be reproduced, except in full, without the written consent of Pace Analytical Services, LLC.Date: 03/19/2024 12:26 PM Pace Analytical Services, LLC 9800 Kincey Ave. Suite 100 Huntersville, NC 28078 (704)875-9092 Page 5 of 22 #=AR# ANALYTICAL RESULTS Pace Project No.: Project: 92717897 Onslow-Phase 5 (resample) Sample:MW-11 Lab ID:92717897002 Collected:03/07/24 12:25 Received:03/08/24 10:54 Matrix:Water Parameters Results Units DF Prepared Analyzed CAS No.QualReport Limit Analytical Method: EPA 8260D Pace Analytical Services - Charlotte 8260D MSV Low Level Landfill Acetone ND ug/L 03/15/24 04:54 67-64-125.0 1 Acrylonitrile ND ug/L 03/15/24 04:54 107-13-110.0 1 Benzene ND ug/L 03/15/24 04:54 71-43-21.0 1 Bromochloromethane ND ug/L 03/15/24 04:54 74-97-51.0 1 Bromodichloromethane ND ug/L 03/15/24 04:54 75-27-41.0 1 Bromoform ND ug/L 03/15/24 04:54 75-25-21.0 1 Bromomethane ND ug/L 03/15/24 04:54 74-83-9 v22.0 1 2-Butanone (MEK)ND ug/L 03/15/24 04:54 78-93-35.0 1 Carbon disulfide ND ug/L 03/15/24 04:54 75-15-02.0 1 Carbon tetrachloride ND ug/L 03/15/24 04:54 56-23-51.0 1 Chlorobenzene ND ug/L 03/15/24 04:54 108-90-71.0 1 Chloroethane ND ug/L 03/15/24 04:54 75-00-3 v21.0 1 Chloroform ND ug/L 03/15/24 04:54 67-66-31.0 1 Chloromethane ND ug/L 03/15/24 04:54 74-87-31.0 1 Dibromochloromethane ND ug/L 03/15/24 04:54 124-48-11.0 1 Dibromomethane ND ug/L 03/15/24 04:54 74-95-31.0 1 1,2-Dichlorobenzene ND ug/L 03/15/24 04:54 95-50-11.0 1 1,4-Dichlorobenzene ND ug/L 03/15/24 04:54 106-46-71.0 1 trans-1,4-Dichloro-2-butene ND ug/L 03/15/24 04:54 110-57-61.0 1 1,1-Dichloroethane ND ug/L 03/15/24 04:54 75-34-31.0 1 1,2-Dichloroethane ND ug/L 03/15/24 04:54 107-06-21.0 1 1,1-Dichloroethene ND ug/L 03/15/24 04:54 75-35-41.0 1 cis-1,2-Dichloroethene ND ug/L 03/15/24 04:54 156-59-21.0 1 trans-1,2-Dichloroethene ND ug/L 03/15/24 04:54 156-60-51.0 1 1,2-Dichloropropane ND ug/L 03/15/24 04:54 78-87-51.0 1 cis-1,3-Dichloropropene ND ug/L 03/15/24 04:54 10061-01-51.0 1 trans-1,3-Dichloropropene ND ug/L 03/15/24 04:54 10061-02-61.0 1 Ethylbenzene ND ug/L 03/15/24 04:54 100-41-41.0 1 2-Hexanone ND ug/L 03/15/24 04:54 591-78-65.0 1 Iodomethane ND ug/L 03/15/24 04:54 74-88-420.0 1 Methylene Chloride ND ug/L 03/15/24 04:54 75-09-25.0 1 4-Methyl-2-pentanone (MIBK)ND ug/L 03/15/24 04:54 108-10-15.0 1 Styrene ND ug/L 03/15/24 04:54 100-42-51.0 1 1,1,1,2-Tetrachloroethane ND ug/L 03/15/24 04:54 630-20-61.0 1 1,1,2,2-Tetrachloroethane ND ug/L 03/15/24 04:54 79-34-51.0 1 Tetrachloroethene ND ug/L 03/15/24 04:54 127-18-41.0 1 Toluene ND ug/L 03/15/24 04:54 108-88-31.0 1 1,1,1-Trichloroethane ND ug/L 03/15/24 04:54 71-55-61.0 1 1,1,2-Trichloroethane ND ug/L 03/15/24 04:54 79-00-51.0 1 Trichloroethene ND ug/L 03/15/24 04:54 79-01-61.0 1 Trichlorofluoromethane ND ug/L 03/15/24 04:54 75-69-41.0 1 1,2,3-Trichloropropane ND ug/L 03/15/24 04:54 96-18-41.0 1 Vinyl acetate ND ug/L 03/15/24 04:54 108-05-42.0 1 Vinyl chloride ND ug/L 03/15/24 04:54 75-01-41.0 1 Xylene (Total)ND ug/L 03/15/24 04:54 1330-20-71.0 1 m&p-Xylene ND ug/L 03/15/24 04:54 179601-23-12.0 1 REPORT OF LABORATORY ANALYSIS This report shall not be reproduced, except in full, without the written consent of Pace Analytical Services, LLC.Date: 03/19/2024 12:26 PM Pace Analytical Services, LLC 9800 Kincey Ave. Suite 100 Huntersville, NC 28078 (704)875-9092 Page 6 of 22 #=AR# ANALYTICAL RESULTS Pace Project No.: Project: 92717897 Onslow-Phase 5 (resample) Sample:MW-11 Lab ID:92717897002 Collected:03/07/24 12:25 Received:03/08/24 10:54 Matrix:Water Parameters Results Units DF Prepared Analyzed CAS No.QualReport Limit Analytical Method: EPA 8260D Pace Analytical Services - Charlotte 8260D MSV Low Level Landfill o-Xylene ND ug/L 03/15/24 04:54 95-47-61.0 1 Surrogates 4-Bromofluorobenzene (S)100 %03/15/24 04:54 460-00-470-130 1 1,2-Dichloroethane-d4 (S)91 %03/15/24 04:54 17060-07-070-130 1 Toluene-d8 (S)100 %03/15/24 04:54 2037-26-570-130 1 Analytical Method: EPA 8260D Mod. Pace Analytical Services - Charlotte 8260D MSV SIM 1,4-Dioxane (p-Dioxane)ND ug/L 03/13/24 00:59 123-91-12.0 1 Surrogates 1,2-Dichloroethane-d4 (S)102 %03/13/24 00:59 17060-07-067-130 1 Toluene-d8 (S)102 %03/13/24 00:59 2037-26-570-130 1 REPORT OF LABORATORY ANALYSIS This report shall not be reproduced, except in full, without the written consent of Pace Analytical Services, LLC.Date: 03/19/2024 12:26 PM Pace Analytical Services, LLC 9800 Kincey Ave. Suite 100 Huntersville, NC 28078 (704)875-9092 Page 7 of 22 #=AR# ANALYTICAL RESULTS Pace Project No.: Project: 92717897 Onslow-Phase 5 (resample) Sample:MW-11A Lab ID:92717897003 Collected:03/07/24 13:15 Received:03/08/24 10:54 Matrix:Water Parameters Results Units DF Prepared Analyzed CAS No.QualReport Limit Analytical Method: EPA 8260D Pace Analytical Services - Charlotte 8260D MSV Low Level Landfill Acetone ND ug/L 03/15/24 05:11 67-64-125.0 1 Acrylonitrile ND ug/L 03/15/24 05:11 107-13-110.0 1 Benzene ND ug/L 03/15/24 05:11 71-43-21.0 1 Bromochloromethane ND ug/L 03/15/24 05:11 74-97-51.0 1 Bromodichloromethane ND ug/L 03/15/24 05:11 75-27-41.0 1 Bromoform ND ug/L 03/15/24 05:11 75-25-21.0 1 Bromomethane ND ug/L 03/15/24 05:11 74-83-9 v22.0 1 2-Butanone (MEK)ND ug/L 03/15/24 05:11 78-93-35.0 1 Carbon disulfide ND ug/L 03/15/24 05:11 75-15-02.0 1 Carbon tetrachloride ND ug/L 03/15/24 05:11 56-23-51.0 1 Chlorobenzene ND ug/L 03/15/24 05:11 108-90-71.0 1 Chloroethane ND ug/L 03/15/24 05:11 75-00-3 v21.0 1 Chloroform ND ug/L 03/15/24 05:11 67-66-31.0 1 Chloromethane ND ug/L 03/15/24 05:11 74-87-31.0 1 Dibromochloromethane ND ug/L 03/15/24 05:11 124-48-11.0 1 Dibromomethane ND ug/L 03/15/24 05:11 74-95-31.0 1 1,2-Dichlorobenzene ND ug/L 03/15/24 05:11 95-50-11.0 1 1,4-Dichlorobenzene ND ug/L 03/15/24 05:11 106-46-71.0 1 trans-1,4-Dichloro-2-butene ND ug/L 03/15/24 05:11 110-57-61.0 1 1,1-Dichloroethane ND ug/L 03/15/24 05:11 75-34-31.0 1 1,2-Dichloroethane ND ug/L 03/15/24 05:11 107-06-21.0 1 1,1-Dichloroethene ND ug/L 03/15/24 05:11 75-35-41.0 1 cis-1,2-Dichloroethene ND ug/L 03/15/24 05:11 156-59-21.0 1 trans-1,2-Dichloroethene ND ug/L 03/15/24 05:11 156-60-51.0 1 1,2-Dichloropropane ND ug/L 03/15/24 05:11 78-87-51.0 1 cis-1,3-Dichloropropene ND ug/L 03/15/24 05:11 10061-01-51.0 1 trans-1,3-Dichloropropene ND ug/L 03/15/24 05:11 10061-02-61.0 1 Ethylbenzene ND ug/L 03/15/24 05:11 100-41-41.0 1 2-Hexanone ND ug/L 03/15/24 05:11 591-78-65.0 1 Iodomethane ND ug/L 03/15/24 05:11 74-88-420.0 1 Methylene Chloride ND ug/L 03/15/24 05:11 75-09-25.0 1 4-Methyl-2-pentanone (MIBK)ND ug/L 03/15/24 05:11 108-10-15.0 1 Styrene ND ug/L 03/15/24 05:11 100-42-51.0 1 1,1,1,2-Tetrachloroethane ND ug/L 03/15/24 05:11 630-20-61.0 1 1,1,2,2-Tetrachloroethane ND ug/L 03/15/24 05:11 79-34-51.0 1 Tetrachloroethene ND ug/L 03/15/24 05:11 127-18-41.0 1 Toluene ND ug/L 03/15/24 05:11 108-88-31.0 1 1,1,1-Trichloroethane ND ug/L 03/15/24 05:11 71-55-61.0 1 1,1,2-Trichloroethane ND ug/L 03/15/24 05:11 79-00-51.0 1 Trichloroethene ND ug/L 03/15/24 05:11 79-01-61.0 1 Trichlorofluoromethane ND ug/L 03/15/24 05:11 75-69-41.0 1 1,2,3-Trichloropropane ND ug/L 03/15/24 05:11 96-18-41.0 1 Vinyl acetate ND ug/L 03/15/24 05:11 108-05-42.0 1 Vinyl chloride ND ug/L 03/15/24 05:11 75-01-41.0 1 Xylene (Total)ND ug/L 03/15/24 05:11 1330-20-71.0 1 m&p-Xylene ND ug/L 03/15/24 05:11 179601-23-12.0 1 REPORT OF LABORATORY ANALYSIS This report shall not be reproduced, except in full, without the written consent of Pace Analytical Services, LLC.Date: 03/19/2024 12:26 PM Pace Analytical Services, LLC 9800 Kincey Ave. Suite 100 Huntersville, NC 28078 (704)875-9092 Page 8 of 22 #=AR# ANALYTICAL RESULTS Pace Project No.: Project: 92717897 Onslow-Phase 5 (resample) Sample:MW-11A Lab ID:92717897003 Collected:03/07/24 13:15 Received:03/08/24 10:54 Matrix:Water Parameters Results Units DF Prepared Analyzed CAS No.QualReport Limit Analytical Method: EPA 8260D Pace Analytical Services - Charlotte 8260D MSV Low Level Landfill o-Xylene ND ug/L 03/15/24 05:11 95-47-61.0 1 Surrogates 4-Bromofluorobenzene (S)100 %03/15/24 05:11 460-00-470-130 1 1,2-Dichloroethane-d4 (S)88 %03/15/24 05:11 17060-07-070-130 1 Toluene-d8 (S)101 %03/15/24 05:11 2037-26-570-130 1 Analytical Method: EPA 8260D Mod. Pace Analytical Services - Charlotte 8260D MSV SIM 1,4-Dioxane (p-Dioxane)ND ug/L 03/13/24 01:42 123-91-12.0 1 Surrogates 1,2-Dichloroethane-d4 (S)99 %03/13/24 01:42 17060-07-067-130 1 Toluene-d8 (S)99 %03/13/24 01:42 2037-26-570-130 1 REPORT OF LABORATORY ANALYSIS This report shall not be reproduced, except in full, without the written consent of Pace Analytical Services, LLC.Date: 03/19/2024 12:26 PM Pace Analytical Services, LLC 9800 Kincey Ave. Suite 100 Huntersville, NC 28078 (704)875-9092 Page 9 of 22 #=AR# ANALYTICAL RESULTS Pace Project No.: Project: 92717897 Onslow-Phase 5 (resample) Sample:TRIP BLANK Lab ID:92717897004 Collected:03/07/24 00:00 Received:03/08/24 10:54 Matrix:Water Parameters Results Units DF Prepared Analyzed CAS No.QualReport Limit Analytical Method: EPA 8260D Pace Analytical Services - Charlotte 8260D MSV Low Level Landfill Acetone ND ug/L 03/15/24 01:20 67-64-125.0 1 Acrylonitrile ND ug/L 03/15/24 01:20 107-13-110.0 1 Benzene ND ug/L 03/15/24 01:20 71-43-21.0 1 Bromochloromethane ND ug/L 03/15/24 01:20 74-97-51.0 1 Bromodichloromethane ND ug/L 03/15/24 01:20 75-27-41.0 1 Bromoform ND ug/L 03/15/24 01:20 75-25-21.0 1 Bromomethane ND ug/L 03/15/24 01:20 74-83-9 v22.0 1 2-Butanone (MEK)ND ug/L 03/15/24 01:20 78-93-35.0 1 Carbon disulfide ND ug/L 03/15/24 01:20 75-15-02.0 1 Carbon tetrachloride ND ug/L 03/15/24 01:20 56-23-51.0 1 Chlorobenzene ND ug/L 03/15/24 01:20 108-90-71.0 1 Chloroethane ND ug/L 03/15/24 01:20 75-00-3 v21.0 1 Chloroform ND ug/L 03/15/24 01:20 67-66-31.0 1 Chloromethane ND ug/L 03/15/24 01:20 74-87-31.0 1 Dibromochloromethane ND ug/L 03/15/24 01:20 124-48-11.0 1 Dibromomethane ND ug/L 03/15/24 01:20 74-95-31.0 1 1,2-Dichlorobenzene ND ug/L 03/15/24 01:20 95-50-11.0 1 1,4-Dichlorobenzene ND ug/L 03/15/24 01:20 106-46-71.0 1 trans-1,4-Dichloro-2-butene ND ug/L 03/15/24 01:20 110-57-61.0 1 1,1-Dichloroethane ND ug/L 03/15/24 01:20 75-34-31.0 1 1,2-Dichloroethane ND ug/L 03/15/24 01:20 107-06-21.0 1 1,1-Dichloroethene ND ug/L 03/15/24 01:20 75-35-41.0 1 cis-1,2-Dichloroethene ND ug/L 03/15/24 01:20 156-59-21.0 1 trans-1,2-Dichloroethene ND ug/L 03/15/24 01:20 156-60-51.0 1 1,2-Dichloropropane ND ug/L 03/15/24 01:20 78-87-51.0 1 cis-1,3-Dichloropropene ND ug/L 03/15/24 01:20 10061-01-51.0 1 trans-1,3-Dichloropropene ND ug/L 03/15/24 01:20 10061-02-61.0 1 Ethylbenzene ND ug/L 03/15/24 01:20 100-41-41.0 1 2-Hexanone ND ug/L 03/15/24 01:20 591-78-65.0 1 Iodomethane ND ug/L 03/15/24 01:20 74-88-420.0 1 Methylene Chloride ND ug/L 03/15/24 01:20 75-09-25.0 1 4-Methyl-2-pentanone (MIBK)ND ug/L 03/15/24 01:20 108-10-15.0 1 Styrene ND ug/L 03/15/24 01:20 100-42-51.0 1 1,1,1,2-Tetrachloroethane ND ug/L 03/15/24 01:20 630-20-61.0 1 1,1,2,2-Tetrachloroethane ND ug/L 03/15/24 01:20 79-34-51.0 1 Tetrachloroethene ND ug/L 03/15/24 01:20 127-18-41.0 1 Toluene ND ug/L 03/15/24 01:20 108-88-31.0 1 1,1,1-Trichloroethane ND ug/L 03/15/24 01:20 71-55-61.0 1 1,1,2-Trichloroethane ND ug/L 03/15/24 01:20 79-00-51.0 1 Trichloroethene ND ug/L 03/15/24 01:20 79-01-61.0 1 Trichlorofluoromethane ND ug/L 03/15/24 01:20 75-69-41.0 1 1,2,3-Trichloropropane ND ug/L 03/15/24 01:20 96-18-41.0 1 Vinyl acetate ND ug/L 03/15/24 01:20 108-05-42.0 1 Vinyl chloride ND ug/L 03/15/24 01:20 75-01-41.0 1 Xylene (Total)ND ug/L 03/15/24 01:20 1330-20-71.0 1 m&p-Xylene ND ug/L 03/15/24 01:20 179601-23-12.0 1 REPORT OF LABORATORY ANALYSIS This report shall not be reproduced, except in full, without the written consent of Pace Analytical Services, LLC.Date: 03/19/2024 12:26 PM Pace Analytical Services, LLC 9800 Kincey Ave. Suite 100 Huntersville, NC 28078 (704)875-9092 Page 10 of 22 #=AR# ANALYTICAL RESULTS Pace Project No.: Project: 92717897 Onslow-Phase 5 (resample) Sample:TRIP BLANK Lab ID:92717897004 Collected:03/07/24 00:00 Received:03/08/24 10:54 Matrix:Water Parameters Results Units DF Prepared Analyzed CAS No.QualReport Limit Analytical Method: EPA 8260D Pace Analytical Services - Charlotte 8260D MSV Low Level Landfill o-Xylene ND ug/L 03/15/24 01:20 95-47-61.0 1 Surrogates 4-Bromofluorobenzene (S)100 %03/15/24 01:20 460-00-470-130 1 1,2-Dichloroethane-d4 (S)87 %03/15/24 01:20 17060-07-070-130 1 Toluene-d8 (S)101 %03/15/24 01:20 2037-26-570-130 1 REPORT OF LABORATORY ANALYSIS This report shall not be reproduced, except in full, without the written consent of Pace Analytical Services, LLC.Date: 03/19/2024 12:26 PM Pace Analytical Services, LLC 9800 Kincey Ave. Suite 100 Huntersville, NC 28078 (704)875-9092 Page 11 of 22 #=QC# QUALITY CONTROL DATA Pace Project No.: Project: 92717897 Onslow-Phase 5 (resample) Results presented on this page are in the units indicated by the "Units" column except where an alternate unit is presented to the right of the result. QC Batch: QC Batch Method: Analysis Method: Analysis Description: 838756 EPA 8260D EPA 8260D 8260D MSV Low Level Landfill Laboratory:Pace Analytical Services - Charlotte Associated Lab Samples:92717897001, 92717897002, 92717897003, 92717897004 Parameter Units Blank Result Reporting Limit Qualifiers METHOD BLANK:4332552 Associated Lab Samples:92717897001, 92717897002, 92717897003, 92717897004 Matrix:Water Analyzed 1,1,1,2-Tetrachloroethane ug/L ND 1.0 03/15/24 00:45 1,1,1-Trichloroethane ug/L ND 1.0 03/15/24 00:45 1,1,2,2-Tetrachloroethane ug/L ND 1.0 03/15/24 00:45 1,1,2-Trichloroethane ug/L ND 1.0 03/15/24 00:45 1,1-Dichloroethane ug/L ND 1.0 03/15/24 00:45 1,1-Dichloroethene ug/L ND 1.0 03/15/24 00:45 1,2,3-Trichloropropane ug/L ND 1.0 03/15/24 00:45 1,2-Dichlorobenzene ug/L ND 1.0 03/15/24 00:45 1,2-Dichloroethane ug/L ND 1.0 03/15/24 00:45 1,2-Dichloropropane ug/L ND 1.0 03/15/24 00:45 1,4-Dichlorobenzene ug/L ND 1.0 03/15/24 00:45 2-Butanone (MEK)ug/L ND 5.0 03/15/24 00:45 2-Hexanone ug/L ND 5.0 03/15/24 00:45 4-Methyl-2-pentanone (MIBK)ug/L ND 5.0 03/15/24 00:45 Acetone ug/L ND 25.0 03/15/24 00:45 Acrylonitrile ug/L ND 10.0 03/15/24 00:45 Benzene ug/L ND 1.0 03/15/24 00:45 Bromochloromethane ug/L ND 1.0 03/15/24 00:45 Bromodichloromethane ug/L ND 1.0 03/15/24 00:45 Bromoform ug/L ND 1.0 03/15/24 00:45 Bromomethane ug/L ND 2.0 v203/15/24 00:45 Carbon disulfide ug/L ND 2.0 03/15/24 00:45 Carbon tetrachloride ug/L ND 1.0 03/15/24 00:45 Chlorobenzene ug/L ND 1.0 03/15/24 00:45 Chloroethane ug/L ND 1.0 v203/15/24 00:45 Chloroform ug/L ND 1.0 03/15/24 00:45 Chloromethane ug/L ND 1.0 03/15/24 00:45 cis-1,2-Dichloroethene ug/L ND 1.0 03/15/24 00:45 cis-1,3-Dichloropropene ug/L ND 1.0 03/15/24 00:45 Dibromochloromethane ug/L ND 1.0 03/15/24 00:45 Dibromomethane ug/L ND 1.0 03/15/24 00:45 Ethylbenzene ug/L ND 1.0 03/15/24 00:45 Iodomethane ug/L ND 20.0 03/15/24 00:45 m&p-Xylene ug/L ND 2.0 03/15/24 00:45 Methylene Chloride ug/L ND 5.0 03/15/24 00:45 o-Xylene ug/L ND 1.0 03/15/24 00:45 Styrene ug/L ND 1.0 03/15/24 00:45 Tetrachloroethene ug/L ND 1.0 03/15/24 00:45 Toluene ug/L ND 1.0 03/15/24 00:45 trans-1,2-Dichloroethene ug/L ND 1.0 03/15/24 00:45 REPORT OF LABORATORY ANALYSIS This report shall not be reproduced, except in full, without the written consent of Pace Analytical Services, LLC.Date: 03/19/2024 12:26 PM Pace Analytical Services, LLC 9800 Kincey Ave. Suite 100 Huntersville, NC 28078 (704)875-9092 Page 12 of 22 #=QC# QUALITY CONTROL DATA Pace Project No.: Project: 92717897 Onslow-Phase 5 (resample) Results presented on this page are in the units indicated by the "Units" column except where an alternate unit is presented to the right of the result. Parameter Units Blank Result Reporting Limit Qualifiers METHOD BLANK:4332552 Associated Lab Samples:92717897001, 92717897002, 92717897003, 92717897004 Matrix:Water Analyzed trans-1,3-Dichloropropene ug/L ND 1.0 03/15/24 00:45 trans-1,4-Dichloro-2-butene ug/L ND 1.0 03/15/24 00:45 Trichloroethene ug/L ND 1.0 03/15/24 00:45 Trichlorofluoromethane ug/L ND 1.0 03/15/24 00:45 Vinyl acetate ug/L ND 2.0 03/15/24 00:45 Vinyl chloride ug/L ND 1.0 03/15/24 00:45 Xylene (Total)ug/L ND 1.0 03/15/24 00:45 1,2-Dichloroethane-d4 (S)%88 70-130 03/15/24 00:45 4-Bromofluorobenzene (S)%98 70-130 03/15/24 00:45 Toluene-d8 (S)%102 70-130 03/15/24 00:45 Parameter Units LCS Result % Rec Limits Qualifiers% RecConc. 4332553LABORATORY CONTROL SAMPLE: LCSSpike 1,1,1,2-Tetrachloroethane ug/L 18.620 93 70-130 1,1,1-Trichloroethane ug/L 18.520 92 70-130 1,1,2,2-Tetrachloroethane ug/L 17.720 89 70-130 1,1,2-Trichloroethane ug/L 18.520 92 70-130 1,1-Dichloroethane ug/L 18.620 93 70-130 1,1-Dichloroethene ug/L 17.920 89 69-131 1,2,3-Trichloropropane ug/L 18.520 93 70-130 1,2-Dichlorobenzene ug/L 19.620 98 70-130 1,2-Dichloroethane ug/L 18.220 91 70-130 1,2-Dichloropropane ug/L 18.820 94 70-130 1,4-Dichlorobenzene ug/L 18.920 94 70-130 2-Butanone (MEK)ug/L 33.240 83 67-133 2-Hexanone ug/L 35.340 88 70-133 4-Methyl-2-pentanone (MIBK)ug/L 35.040 88 70-130 Acetone ug/L 33.140 83 67-130 Acrylonitrile ug/L 87.0100 87 70-130 Benzene ug/L 19.620 98 70-130 Bromochloromethane ug/L 18.820 94 70-130 Bromodichloromethane ug/L 17.920 90 70-130 Bromoform ug/L 17.920 89 70-133 Bromomethane ug/L 14.9 v3207441-148 Carbon disulfide ug/L 18.920 94 70-131 Carbon tetrachloride ug/L 19.520 97 70-130 Chlorobenzene ug/L 19.020 95 70-130 Chloroethane ug/L 15.3 v3207741-157 Chloroform ug/L 17.720 88 70-130 Chloromethane ug/L 18.120 91 59-141 cis-1,2-Dichloroethene ug/L 17.920 89 70-130 cis-1,3-Dichloropropene ug/L 19.020 95 70-130 Dibromochloromethane ug/L 18.320 91 70-130 REPORT OF LABORATORY ANALYSIS This report shall not be reproduced, except in full, without the written consent of Pace Analytical Services, LLC.Date: 03/19/2024 12:26 PM Pace Analytical Services, LLC 9800 Kincey Ave. Suite 100 Huntersville, NC 28078 (704)875-9092 Page 13 of 22 #=QC# QUALITY CONTROL DATA Pace Project No.: Project: 92717897 Onslow-Phase 5 (resample) Results presented on this page are in the units indicated by the "Units" column except where an alternate unit is presented to the right of the result. Parameter Units LCS Result % Rec Limits Qualifiers% RecConc. 4332553LABORATORY CONTROL SAMPLE: LCSSpike Dibromomethane ug/L 18.520 93 70-130 Ethylbenzene ug/L 19.720 98 70-130 Iodomethane ug/L 37.240 93 57-140 m&p-Xylene ug/L 39.140 98 70-130 Methylene Chloride ug/L 18.320 92 62-130 o-Xylene ug/L 19.220 96 70-130 Styrene ug/L 18.920 95 70-130 Tetrachloroethene ug/L 19.520 97 70-130 Toluene ug/L 19.020 95 70-130 trans-1,2-Dichloroethene ug/L 18.120 91 70-130 trans-1,3-Dichloropropene ug/L 19.020 95 70-130 trans-1,4-Dichloro-2-butene ug/L 17.520 87 57-149 Trichloroethene ug/L 20.020 100 70-130 Trichlorofluoromethane ug/L 18.120 90 57-130 Vinyl acetate ug/L 34.640 87 70-141 Vinyl chloride ug/L 18.420 92 66-140 Xylene (Total)ug/L 58.360 97 70-130 1,2-Dichloroethane-d4 (S)%94 70-130 4-Bromofluorobenzene (S)%99 70-130 Toluene-d8 (S)%97 70-130 Parameter Units MS Result % Rec Limits Qualifiers% RecConc. 4332554MATRIX SPIKE SAMPLE: MSSpike Result 92718464001 1,1,1,2-Tetrachloroethane ug/L 21.720 108 70-146ND 1,1,1-Trichloroethane ug/L 21.920 109 70-150ND 1,1,2,2-Tetrachloroethane ug/L 20.120 100 66-144ND 1,1,2-Trichloroethane ug/L 20.720 103 70-142ND 1,1-Dichloroethane ug/L 21.020 105 68-150ND 1,1-Dichloroethene ug/L 21.520 108 64-162ND 1,2,3-Trichloropropane ug/L 20.820 104 66-144ND 1,2-Dichlorobenzene ug/L 21.220 106 70-142ND 1,2-Dichloroethane ug/L 20.420 102 68-145ND 1,2-Dichloropropane ug/L 21.520 108 70-144ND 1,4-Dichlorobenzene ug/L 21.320 106 70-140ND 2-Butanone (MEK)ug/L 36.9 v3409257-156ND 2-Hexanone ug/L 40.940 102 62-153ND 4-Methyl-2-pentanone (MIBK)ug/L 39.040 97 65-144ND Acetone ug/L 38.8 v3409749-162ND Acrylonitrile ug/L 96.6100 97 59-155ND Benzene ug/L 22.520 113 68-144ND Bromochloromethane ug/L 20.820 104 70-148ND Bromodichloromethane ug/L 20.220 101 70-141ND Bromoform ug/L 19.520 98 59-144ND Bromomethane ug/L 19.2 v3209623-190ND REPORT OF LABORATORY ANALYSIS This report shall not be reproduced, except in full, without the written consent of Pace Analytical Services, LLC.Date: 03/19/2024 12:26 PM Pace Analytical Services, LLC 9800 Kincey Ave. Suite 100 Huntersville, NC 28078 (704)875-9092 Page 14 of 22 #=QC# QUALITY CONTROL DATA Pace Project No.: Project: 92717897 Onslow-Phase 5 (resample) Results presented on this page are in the units indicated by the "Units" column except where an alternate unit is presented to the right of the result. Parameter Units MS Result % Rec Limits Qualifiers% RecConc. 4332554MATRIX SPIKE SAMPLE: MSSpike Result 92718464001 Carbon disulfide ug/L 22.520 113 64-160ND Carbon tetrachloride ug/L 23.620 118 70-147ND Chlorobenzene ug/L 22.120 110 70-143ND Chloroethane ug/L 18.4 v3209255-190ND Chloroform ug/L 19.820 99 67-148ND Chloromethane ug/L 21.520 107 38-180ND cis-1,2-Dichloroethene ug/L 20.520 103 67-151ND cis-1,3-Dichloropropene ug/L 21.520 107 70-142ND Dibromochloromethane ug/L 20.220 101 68-140ND Dibromomethane ug/L 20.920 104 70-142ND Ethylbenzene ug/L 22.620 113 70-145ND Iodomethane ug/L 42.140 105 37-160ND m&p-Xylene ug/L 44.340 111 70-148ND Methylene Chloride ug/L 19.620 98 54-149ND o-Xylene ug/L 21.920 109 70-145ND Styrene ug/L 21.320 107 70-147ND Tetrachloroethene ug/L 22.520 112 70-145ND Toluene ug/L 22.020 110 65-146ND trans-1,2-Dichloroethene ug/L 21.320 106 69-155ND trans-1,3-Dichloropropene ug/L 21.620 108 70-142ND trans-1,4-Dichloro-2-butene ug/L 17.320 86 39-149ND Trichloroethene ug/L 23.220 116 70-152ND Trichlorofluoromethane ug/L 21.820 109 60-158ND Vinyl acetate ug/L 39.140 98 56-157ND Vinyl chloride ug/L 22.620 113 51-178ND Xylene (Total)ug/L 66.260 110 70-146ND 1,2-Dichloroethane-d4 (S)%96 70-130 4-Bromofluorobenzene (S)%100 70-130 Toluene-d8 (S)%99 70-130 Parameter Units Dup Result QualifiersRPDResult 92718464003 4332555SAMPLE DUPLICATE: 1,1,1,2-Tetrachloroethane ug/L NDND 1,1,1-Trichloroethane ug/L NDND 1,1,2,2-Tetrachloroethane ug/L NDND 1,1,2-Trichloroethane ug/L NDND 1,1-Dichloroethane ug/L NDND 1,1-Dichloroethene ug/L NDND 1,2,3-Trichloropropane ug/L NDND 1,2-Dichlorobenzene ug/L NDND 1,2-Dichloroethane ug/L NDND 1,2-Dichloropropane ug/L NDND 1,4-Dichlorobenzene ug/L NDND 2-Butanone (MEK)ug/L ND v2ND REPORT OF LABORATORY ANALYSIS This report shall not be reproduced, except in full, without the written consent of Pace Analytical Services, LLC.Date: 03/19/2024 12:26 PM Pace Analytical Services, LLC 9800 Kincey Ave. Suite 100 Huntersville, NC 28078 (704)875-9092 Page 15 of 22 #=QC# QUALITY CONTROL DATA Pace Project No.: Project: 92717897 Onslow-Phase 5 (resample) Results presented on this page are in the units indicated by the "Units" column except where an alternate unit is presented to the right of the result. Parameter Units Dup Result QualifiersRPDResult 92718464003 4332555SAMPLE DUPLICATE: 2-Hexanone ug/L NDND 4-Methyl-2-pentanone (MIBK)ug/L NDND Acetone ug/L ND v2ND Acrylonitrile ug/L NDND Benzene ug/L NDND Bromochloromethane ug/L NDND Bromodichloromethane ug/L NDND Bromoform ug/L NDND Bromomethane ug/L ND v2ND Carbon disulfide ug/L NDND Carbon tetrachloride ug/L NDND Chlorobenzene ug/L NDND Chloroethane ug/L ND v2ND Chloroform ug/L NDND Chloromethane ug/L NDND cis-1,2-Dichloroethene ug/L NDND cis-1,3-Dichloropropene ug/L NDND Dibromochloromethane ug/L NDND Dibromomethane ug/L NDND Ethylbenzene ug/L NDND Iodomethane ug/L NDND m&p-Xylene ug/L NDND Methylene Chloride ug/L NDND o-Xylene ug/L NDND Styrene ug/L NDND Tetrachloroethene ug/L NDND Toluene ug/L NDND trans-1,2-Dichloroethene ug/L NDND trans-1,3-Dichloropropene ug/L NDND trans-1,4-Dichloro-2-butene ug/L NDND Trichloroethene ug/L NDND Trichlorofluoromethane ug/L NDND Vinyl acetate ug/L NDND Vinyl chloride ug/L NDND Xylene (Total)ug/L NDND 1,2-Dichloroethane-d4 (S)%9087 4-Bromofluorobenzene (S)%9899 Toluene-d8 (S)%101101 REPORT OF LABORATORY ANALYSIS This report shall not be reproduced, except in full, without the written consent of Pace Analytical Services, LLC.Date: 03/19/2024 12:26 PM Pace Analytical Services, LLC 9800 Kincey Ave. Suite 100 Huntersville, NC 28078 (704)875-9092 Page 16 of 22 #=QC# QUALITY CONTROL DATA Pace Project No.: Project: 92717897 Onslow-Phase 5 (resample) Results presented on this page are in the units indicated by the "Units" column except where an alternate unit is presented to the right of the result. QC Batch: QC Batch Method: Analysis Method: Analysis Description: 838484 EPA 8260D Mod. EPA 8260D Mod. 8260D MSV SIM Laboratory:Pace Analytical Services - Charlotte Associated Lab Samples:92717897001, 92717897002, 92717897003 Parameter Units Blank Result Reporting Limit Qualifiers METHOD BLANK:4331154 Associated Lab Samples:92717897001, 92717897002, 92717897003 Matrix:Water Analyzed 1,4-Dioxane (p-Dioxane)ug/L ND 2.0 03/12/24 17:25 1,2-Dichloroethane-d4 (S)%106 67-130 03/12/24 17:25 Toluene-d8 (S)%105 70-130 03/12/24 17:25 Parameter Units LCS Result % Rec Limits Qualifiers% RecConc. 4331155LABORATORY CONTROL SAMPLE: LCSSpike 1,4-Dioxane (p-Dioxane)ug/L 19.320 97 70-130 1,2-Dichloroethane-d4 (S)%102 67-130 Toluene-d8 (S)%105 70-130 Parameter Units MS Result % Rec Limits Qual% RecConc. 4331156MATRIX SPIKE & MATRIX SPIKE DUPLICATE: MSSpike Result 92717897001 4331157 MSD Result MSD % Rec RPD MSDMS Spike Conc. 1,4-Dioxane (p-Dioxane)ug/L 20 100 55-137102 320ND19.9 20.5 1,2-Dichloroethane-d4 (S)%100 67-130100 Toluene-d8 (S)%100 70-13099 REPORT OF LABORATORY ANALYSIS This report shall not be reproduced, except in full, without the written consent of Pace Analytical Services, LLC.Date: 03/19/2024 12:26 PM Pace Analytical Services, LLC 9800 Kincey Ave. Suite 100 Huntersville, NC 28078 (704)875-9092 Page 17 of 22 #=QL# QUALIFIERS Pace Project No.: Project: 92717897 Onslow-Phase 5 (resample) DEFINITIONS DF - Dilution Factor, if reported, represents the factor applied to the reported data due to dilution of the sample aliquot. ND - Not Detected at or above adjusted reporting limit. TNTC - Too Numerous To Count J - Estimated concentration above the adjusted method detection limit and below the adjusted reporting limit. MDL - Adjusted Method Detection Limit. PQL - Practical Quantitation Limit. RL - Reporting Limit - The lowest concentration value that meets project requirements for quantitative data with known precision and bias for a specific analyte in a specific matrix. S - Surrogate 1,2-Diphenylhydrazine decomposes to and cannot be separated from Azobenzene using Method 8270. The result for each analyte is a combined concentration. Consistent with EPA guidelines, unrounded data are displayed and have been used to calculate % recovery and RPD values. LCS(D) - Laboratory Control Sample (Duplicate) MS(D) - Matrix Spike (Duplicate) DUP - Sample Duplicate RPD - Relative Percent Difference NC - Not Calculable. SG - Silica Gel - Clean-Up U - Indicates the compound was analyzed for, but not detected. Acid preservation may not be appropriate for 2 Chloroethylvinyl ether. A separate vial preserved to a pH of 4-5 is recommended in SW846 Chapter 4 for the analysis of Acrolein and Acrylonitrile by EPA Method 8260. N-Nitrosodiphenylamine decomposes and cannot be separated from Diphenylamine using Method 8270. The result reported for each analyte is a combined concentration. Reported results are not rounded until the final step prior to reporting. Therefore, calculated parameters that are typically reported as "Total" may vary slightly from the sum of the reported component parameters. Pace Analytical is TNI accredited. Contact your Pace PM for the current list of accredited analytes. TNI - The NELAC Institute. ANALYTE QUALIFIERS The continuing calibration verification was below the method acceptance limit. The analyte was not detected in the associated samples and the sensitivity of the instrument was verified with a reporting limit check standard.v2 The continuing calibration verification was below the method acceptance limit. Any detection for the analyte in the associated samples may have low bias.v3 REPORT OF LABORATORY ANALYSIS This report shall not be reproduced, except in full, without the written consent of Pace Analytical Services, LLC.Date: 03/19/2024 12:26 PM Pace Analytical Services, LLC 9800 Kincey Ave. Suite 100 Huntersville, NC 28078 (704)875-9092 Page 18 of 22 #=CR# QUALITY CONTROL DATA CROSS REFERENCE TABLE Pace Project No.: Project: 92717897 Onslow-Phase 5 (resample) Lab ID Sample ID QC Batch Method QC Batch Analytical Method Analytical Batch 92717897001 838756MW-10 EPA 8260D 92717897002 838756MW-11 EPA 8260D 92717897003 838756MW-11A EPA 8260D 92717897004 838756TRIP BLANK EPA 8260D 92717897001 838484MW-10 EPA 8260D Mod. 92717897002 838484MW-11 EPA 8260D Mod. 92717897003 838484MW-11A EPA 8260D Mod. REPORT OF LABORATORY ANALYSIS This report shall not be reproduced, except in full, without the written consent of Pace Analytical Services, LLC.Date: 03/19/2024 12:26 PM Pace Analytical Services, LLC 9800 Kincey Ave. Suite 100 Huntersville, NC 28078 (704)875-9092 Page 19 of 22 Page 20 of 22 Page 21 of 22 Page 22 of 22