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FA-29152_48332_CA_CSA_20230131
3502 Hayes Road • Monroe, North Carolina 28110 113 West Firetower Road, Suite G • Winterville, North Carolina 28590 Phone (704) 845-4010 • (888) 870-4133 • Fax (704) 845-4012 February 6, 2023 Mr. Ken Currie NCDEQ-UST Section Fayetteville Regional Office Systel Building 225 Green Street, Suite 714 Fayetteville, NC 28301-5043 Re: Comprehensive Site Assessment Report January 2023 Breeden’s 22900 Aberdeen Road Laurinburg, Scotland County North Carolina Facility ID Number: 00-0-0000000347 Incident Number: 48332 GRI Project Number: 5991 Dear Mr. Currie, Please find attached the referenced revised, report for the abovementioned site. If you have any questions, please contact Ethan Rogerson at 704-845-4010. Sincerely, Geological Resources, Inc. Leslie Maxtone-Graham Administrative Assistant Enclosure Cc: Mr. Jimmy McDonald; Quality Oil & Gas, file 3502 Hayes Road • Monroe, North Carolina 28110 113 West Firetower Road, Suite G • Winterville, North Carolina 28590 Phone (704) 845-4010 • (888) 870-4133 • Fax (704) 845-4012 Engineering Certification: C-2727 • Geology Certification: C-127 Comprehensive Site Assessment Report January 2023 Breeden’s 66 22900 Aberdeen Road Laurinburg, Scotland County North Carolina Facility ID Number: 0-00-0000000347 Incident Number: 48332 GRI Project Number: 5991 Prepared for: Mr. Jimmy McDonald Quality Oil & Gas 203 West Broad Avenue Rockingham, North Carolina 28379 January 31, 2023 William Regenthal, P.G. Project Manager Eric M. Eubanks, P.G. Report Writer ___________________________________________________________________________________________ Prepared by: Geological Resources, Inc. Comprehensive Site Assessment Report Prepared on: January 31, 2023 Breeden’s 66 Project Manager: William Regenthal, P.G. GRI Project No. 5991 i EXECUTIVE SUMMARY The Breeden’s 66 site is an active convenience store and gasoline retail facility located at 22900 Aberdeen Road in Laurinburg, Scotland County, North Carolina. The site is covered by asphalt, concrete, and grass. There is one 4,000-gallon regular gasoline UST, one 1,500-gallon plus gasoline UST, one 1,000-gallon premium gasoline UST and two 1,000-gallon diesel USTs currently in use at the site with five associated dispensers on one dispenser island. The surrounding properties are zoned residential (R-1) and residential-agricultural (RA). On November 30, 2021, during routine compliance inspection activities, two damaged/defective UST spill buckets associated with the 1,000-gallon diesel and 1,500-gallon plus gasoline USTs, as well as a suspected release beneath the off-road diesel dispenser were reported at the site. GRI conducted a site check at the subject site on March 16 and March 17, 2022. Site Check results confirmed a release at the site and an LSA was required. A receptor survey was conducted on April 13, 2022. Five potable water supply wells were identified within a 1,500-foot radius of the site. Two of the identified water supply wells were located within a 1,000-foot radius of the site; one of the water supply wells was located within a 250-foot radius of the site. Public water is available to the subject site and to some of the surrounding properties. On April 13, 2022, one monitoring well was installed and sampled as part of the LSA activities. The site risk conditions warranted a High-Risk LSA, and three additional monitoring wells were installed and sampled on June 23, 2022. Based on the results of LSA activities, a CSA was required. Between January 3 and January 6, 2023, four Type II monitoring wells and one Type III telescoping well were installed as part of CSA activities. The contaminant concentrations of benzene, toluene, xylenes, MTBE, naphthalene, TAA, TBA, n-butylbenzene, isopropylbenzene, n-propylbenzene, 1,2,4- trimethylbenzene, 1-methylnaphthalene, lead, C5-C8 aliphatics, C9-C12 aliphatics, C9-C10 aromatics, and/or C11-C22 aromatics reported in the ground water samples collected from MW-1 and MW-3 through MW-8 exceeded the MACs. All contaminant concentrations were below the GCLs. No free product was observed at the site. During CSA activities, six soil borings were advanced to twenty-five feet BGS, and PID readings were collected every two feet. Fifteen soil samples were collected from the borings and analyzed for TPH-GRO and TPH-DRO using UVF technology. The concentrations of TPH-GRO and/or TPH-DRO reported in SB-3- 22’, SB-3-24’, and SB-5-22’ exceeded the RALs. Based on observations made during assessment activities, surficial soils observed at the site consist of various clays, silts, and sands to a depth of 55 feet. Ground water flow was generally toward the northeast. The horizontal hydraulic gradient was calculated as 0.003 ft/ft. The vertical hydraulic gradient was calculated as 0.083ft/ft downward. Rising head slug tests were conducted on MW-1, MW-8, and TW- ___________________________________________________________________________________________ Prepared by: Geological Resources, Inc. Comprehensive Site Assessment Report Prepared on: January 31, 2023 Breeden’s 66 Project Manager: William Regenthal, P.G. GRI Project No. 5991 ii 1. The average hydraulic conductivity and seepage velocity for the Type II monitoring wells were 3.053 x 10-4 feet per minute (0.4396 feet per day) and 8.792 x 10-3 feet per day (3.209 feet per year). The hydraulic conductivity and seepage velocity in the Type III monitoring were 7.378 x 10-4 feet per minute (1.062 feet per day) and 1.06 x 10-2 feet per day (3.88 feet per year), respectively. The site risk classification is determined to be high risk based on the presence of MAC exceedances and the presence of active, potable water supply wells within 1,000 feet of the source of contamination. Therefore, in order to reduce the risk classification, ground water contamination must be remediated to concentrations less than the MACs and/or the owners of the water supply wells change over to public water and the water supply well (WSW-1) within 250’ must be abandoned. GRI recommends conducting comprehensive quarterly ground water sampling events beginning in April 2023. Sampling data should be incorporated into a contaminant Fate and Transport model to make further recommendations towards incident closure. ___________________________________________________________________________________________ Prepared by: Geological Resources, Inc. Comprehensive Site Assessment Report Prepared on: January 31, 2023 Breeden’s 66 Project Manager: William Regenthal, P.G. GRI Project No. 5991 iii SITE INFORMATION 1. Site Identification ú Breeden’s 66 (Facility ID 0-00-0000000347) ú Incident Number 48332 – High Risk (H210A) ú Location of Source Area: 22900 Aberdeen Road Laurinburg, NC 27533 Scotland County 34.865101°N, 79.455527°W (Topographical Map) 2. Information about Contacts Associated with the Leaking UST System UST Owner/Operator Quality Oil & Gas 203 West Broad Avenue Rockingham, NC, 28379 jmcdonald@qualityoilandgas.com Phone: 910-997-3101 Property Owner S&H Rental, Inc. Post Office Box 2048 Raeford, NC 28376 Email: Unknown Phone: Unknown Property Occupant Breeden’s 66 22900 Aberdeen Road Laurinburg, NC 28352 E-mail: Unknown Phone: 910-276-6333 Consultant/Contractor Geological Resources, Inc. 3502 Hayes Road Monroe, NC 28110 wlr@geologicalresourcesinc.com Phone: 704-845-4010 Mobile Laboratory Geological Resources, Inc. 3502 Hayes Road Monroe, NC 28110 wlr@geologicalresourcesinc.com 704-845-4010 Analytical Laboratory Waypoint Analytical 449 Springbrook Road Charlotte, NC 28217 704-549-6364 State Certification No. 402/37735 3. Information about Release ú Release was discovered on March 18, 2022 ú An unknown amount of product was released from the UST System via the damaged/defective UST spill buckets associated with the 1,000-gallon diesel and 1,500-gallon plus gasoline USTs and the leaking off-road diesel dispenser. ú One 4,000-gallon regular gasoline, one 1,500-gallon plus gasoline, one 1,000-gallon premium gasoline and two 1,000-gallon diesel USTs are in use at the site (Tables 1 and 2). Certification: I, Samuel L. McKay, III, a Licensed Geologist for Geological Resources, Inc., do certify that the information contained in this report is correct and accurate to the best of my knowledge. Geological Resources, Inc. is licensed to practice geology and engineering in North Carolina. The certification numbers of the company are C-127 and C-2727, respectively. ___________________________________________________________________________________________ Prepared by: Geological Resources, Inc. Comprehensive Site Assessment Report Prepared on: January 31, 2023 Breeden’s 66 Project Manager: William Regenthal, P.G. GRI Project No. 5991 iv ACRONYMS ACM: Asbestos Containing Materials AFVR: Aggressive Fluid-Vapor Recovery ARR: Acknowledgement of Report Receipt AS: Air Sparging AST: Aboveground Storage Tank ASTM: American Society for Testing and Materials BGS: Below Ground Surface CAP: Corrective Action Plan CFR: Code of Federal Regulations CSA: Comprehensive Site Assessment DPE: Dual Phase Extraction DRO: Total Petroleum Hydrocarbons Diesel Range Organics DWM: Division of Waste Management DWR: Department of Water Resources EPA: Environmental Protection Agency EPH: Extractible Petroleum Hydrocarbons ESA: Environmental Site Assessment GCL: Gross Contamination Level GRI: Geological Resources, Inc. GRO: Total Petroleum Hydrocarbons Gasoline Range Organics LSA: Limited Site Assessment MAC: Maximum Allowable Concentration as specified in T15A NCAC 2L.0202 MADEP: Massachusetts Department of Environmental Protection MCC: Maximum Contaminant Concentrations MMPE: Mobile Multi-Phase Extraction NAPL: Non-Aqueous Phase Liquid, “Free Product” NCDEQ: North Carolina Department of Environmental Quality NCDOT: North Carolina Department of Transportation NFA: Notice of No Further Action NORR: Notice of Regulatory Requirements NOV: Notice of Violation NPDES: National Pollutant Discharge Elimination System NRP: Notice of Residual Petroleum O&M: Operation and Maintenance PAHs: Polynuclear Aromatic Hydrocarbons PCA: Pre-Construction Assessment RAL: Regulatory Action Level SCLs: Soil Cleanup Level SPCC: Spill Prevention Control and Countermeasures SVE: Soil Vapor Extraction SVOCs: Semi-Volatile Organic Compounds SWAP: Source Water Assessment and Protection SWPPP: Stormwater Pollution Prevention Plan TCLP: Toxicity Characteristic Leaching Procedure (EPA Method SW-846 1311) TOC: Top of Casing TPH: Total Petroleum Hydrocarbons USGS: United States Geological Survey UST: Underground Storage Tank UVF: Ultraviolet Fluorescence VOCs: Volatile Organic Compounds VPH: Volatile Petroleum Hydrocarbons ___________________________________________________________________________________________ Prepared by: Geological Resources, Inc. Comprehensive Site Assessment Report Prepared on: January 31, 2023 Breeden’s 66 Project Manager: William Regenthal, P.G. GRI Project No. 5991 TABLE OF CONTENTS EXECUTIVE SUMMARY ....................................................................................................................... i SITE INFORMATION ........................................................................................................................... iii ACRONYMS ....................................................................................................................................... iv 1.0 SITE HISTORY AND CHARACTERIZATION ...................................................................................1 2.0 RECEPTOR INFORMATION ........................................................................................................2 3.0 LAND USE ................................................................................................................................3 4.0 SOIL ASSESSMENT ...................................................................................................................3 5.0 GROUND WATER ASSESSMENT ................................................................................................4 6.0 HYDROGEOLOGIC INVESTIGATION ...........................................................................................5 7.0 REGIONAL GEOLOGY AND HYDROGEOLOGY .............................................................................6 8.0 SITE GEOLOGY AND HYDROGEOLOGY ......................................................................................6 9.0 DISCUSSION ............................................................................................................................7 10.0 CONCLUSIONS AND RECOMMENDATIONS ...............................................................................7 11.0 PUBLIC NOTICE ........................................................................................................................8 12.0 LIMITATIONS ...........................................................................................................................8 13.0 REFERENCES ............................................................................................................................8 FIGURES Figure 1: Site Location Map Figure 2: Site Map Figure 3A: Site Vicinity Map Figure 3B: Zoning Map Figure 4: Soil Quality Map Figure 5: Cross-Section A-A’ Figure 6: Cross-Section B-B’ Figure 7: Ground Water Quality Map Figure 8: Benzene Isoconcentration Map Figure 9: Toluene Isoconcentration Map Figure 10: Xylenes Isoconcentration Map Figure 11: MTBE Isoconcentration Map Figure 12: Naphthalene Isoconcentration Map Figure 13: Water Table Surface Map TABLES Table 1: UST Owner and Operator Information Table 2: UST System Information Table 3: Water Supply Well Information Table 4: Adjacent Property Owner Information Table 5: Land Use Information ___________________________________________________________________________________________ Prepared by: Geological Resources, Inc. Comprehensive Site Assessment Report Prepared on: January 31, 2023 Breeden’s 66 Project Manager: William Regenthal, P.G. GRI Project No. 5991 Table 6: Summary of Soil Sample Analytical Results Table 7: Summary of Ground Water Sample Analytical Results Table 8: Well Construction and Gauging Information Table 9: Summary of Slug Test Analyses APPENDICES Appendix A: State Correspondence Appendix B: Site-Specific Health and Safety Plan Appendix C: UVF Analytical Report Appendix D: RTEs, Well Permits, Well Construction Records, and Subsurface Logs Appendix E: Laboratory Analytical Report Appendix F: Slug Test Data Appendix G: Public Notification ___________________________________________________________________________________________ Prepared by: Geological Resources, Inc. Comprehensive Site Assessment Report Prepared on: January 31, 2023 Breeden’s 66 Project Manager: William Regenthal, P.G. GRI Project No. 5991 1 1.0 SITE HISTORY AND CHARACTERIZATION GRI presents the results of the January 2023 CSA activities at the Breeden’s 66 site, located at 22900 Aberdeen Road in Laurinburg, Scotland County, North Carolina. A topographic map showing the general site location and the surrounding area is included as Figure 1. These activities were conducted in accordance with GRI Proposal No 22-569, which was submitted to the NCDEQ on August 12, 2022, and was approved as Task Authorization Number 48332-1 on August 17, 2022. Two change orders were submitted to NCDEQ on October 11, 2022, and November 11, 2022, and were approved as Task Authorization Numbers 48332-001.1 and 48332-001.2 on October 21, 2022 and November 14, 2022, respectively. State correspondence is included as Appendix A. The site is currently owned and operated by S&H Rental, Inc. as a petroleum retail facility. One 4,000- gallon regular gasoline, one 1,500-gallon plus gasoline, one 1,000-gallon premium gasoline and two 1,000- gallon diesel USTs are currently in use at the site with one associated dispenser island. UST owner/operator information and UST system information are included as Tables 1 and 2, respectively. The Registered Tank Report is shown below: On November 30, 2021, during routine compliance inspection activities, two damaged/defective UST spill buckets associated with the 1,000-gallon diesel and 1,500-gallon plus gasoline USTs, as well as a suspected release beneath the off-road diesel dispenser were reported at the site. On March 16 and 17, 2022, GRI conducted a site check at the subject site. Three soil samples were collected adjacent to the defective spill buckets and from beneath the diesel dispenser. Concentrations of GRO and DRO that exceeded the ___________________________________________________________________________________________ Prepared by: Geological Resources, Inc. Comprehensive Site Assessment Report Prepared on: January 31, 2023 Breeden’s 66 Project Manager: William Regenthal, P.G. GRI Project No. 5991 2 RALs were reported in the soil sample (ORD-1) collected from beneath the diesel dispenser. Site Check results confirmed a release at the site and an LSA was required by NCDEQ. On April 13, 2022, one monitoring well (MW-1) was installed adjacent to the UST basin. Two soil samples were collected at 5 and 15 feet BGS during the installation of MW-1. No concentrations of requested method constituents that exceeded the MCCs were reported in the soil samples collected from MW-1. On April 13, 2022, a ground water sample was collected from MW-1. Contaminant concentrations of benzene, MTBE, naphthalene, TAA, 1-methylnaphthalene, lead, C5-C8 aliphatics, and C9-C10 aromatics that exceeded the MACs were reported in the ground water sample collected from MW-1. Three additional Type II monitoring wells (MW-2 through MW-4) were installed, gauged, and sampled on June 23, 2022 as part of High-Risk LSA activities. Contaminant concentrations of benzene, toluene, ethylbenzene, xylenes, MTBE, naphthalene, isopropylbenzene, n-propylbenzene, 1,2,4-trimethylbenzene, 1,3,5-trimethylbenzene, EDB, 1-methylnaphthalene, 2-methylnaphthalene, C5-C8 aliphatics, C9-C12 aliphatics, C9-C10 aromatics, C9-C18 aliphatics, and/or C11-C22 aromatics exceeded the MACs in the ground water samples collected from MW-2 through MW-4. All contaminant concentrations were below the GCLs. Based on the results of LSA activities, a CSA was required. Between January 3 and January 6, 2023, four additional Type II monitoring wells (MW-5 through MW-8) and one Type III telescoping well (TW-1) were installed as part of CSA activities. The contaminant concentrations of benzene, toluene, xylenes, MTBE, naphthalene, TAA, TBA, n-butylbenzene, isopropylbenzene, n-propylbenzene, 1,2,4-trimethylbenzene, 1-methylnaphthalene, lead, C5-C8 aliphatics, C9-C12 aliphatics, C9-C10 aromatics, and/or C11-C22 aromatics reported in the ground water samples collected from MW-1 and MW-3 through MW-8 exceeded the MACs. All contaminant concentrations were below the GCLs. No free product was observed at the site. During CSA activities, six soil borings (SB-1 through SB-6) were advanced to twenty-five feet BGS, and PID readings were collected every two feet. Fifteen soil samples (SB-2-16’, SB-2-18’, SB-2-20’, SB-2-24’, SB-3- 8’, SB-3-14’, SB-3-16’, SB-3-18’, SB-3-22’, SB-3-24’, SB-4-22’, SB-4-24’, SB-5-18’, SB-5-22’, and SB-5-24’) were collected from the borings and analyzed for TPH-GRO and TPH-DRO using UVF technology. The concentrations of TPH-GRO and/or TPH-DRO reported in SB-3-22’, SB-3-24’, and SB-5-22’ exceeded the RALs. A Site Map showing the locations of the monitoring wells and the structures on-site is included as Figure 2. A copy of the site-specific Health and Safety Plan is included as Appendix B. 2.0 RECEPTOR INFORMATION Water Supply Wells: According to the information determined during receptor survey activities conducted on April 13, 2022, five potable water supply wells were identified within 1,500 feet of the site. Of the identified water supply wells, two of the wells were located within a 1,000-foot radius of the site, and one of the wells was located within a 250-foot radius of the site. A table summarizing the Water Supply Well owner information is included as Table 3. A Site Vicinity Map showing the locations of the water supply wells is included as Figure 3A. ___________________________________________________________________________________________ Prepared by: Geological Resources, Inc. Comprehensive Site Assessment Report Prepared on: January 31, 2023 Breeden’s 66 Project Manager: William Regenthal, P.G. GRI Project No. 5991 3 Public Water Supplies: Municipal water is available to the site and some of the surrounding properties. Water lines run along Aberdeen Road and Monroe Road. Public water is supplied by the Laurinburg Public Works. Surface Water: No surface waters were identified within 1,000’ of the site. Wellhead Protection Areas: On April 28, 2022, GRI personnel accessed the NCDEQ SWAP Program’s website to identify wellhead protection areas in the vicinity of the subject site. The site is not located within a wellhead protection area. Deep Aquifers in the Coastal Plain Physiographic Region: The site is in the Coastal Plain Physiographic Region. The surficial aquifer in the vicinity of the site is relatively thin and is underlain by the Black Creek confining unit and Black Creek aquifer, respectively. Subsurface Structures: No structures with basements were observed in the vicinity of the source area. The water main and other underground utilities run along Aberdeen Road and Monroe Road. 3.0 LAND USE The site is currently occupied by an active petroleum retail facility and convenience store. The closest primary residence is 22920 Aberdeen Road located approximately 115 feet northwest of the site. Cool Spring Methodist Church is located at 16301 Scotch Grove Road, approximately 5,220 feet southeast of the source area at the site. The adjoining properties are residential and agricultural. According to the Scotland County Official property cards, the surrounding areas are zoned residential (R-1) and residential agricultural (RA). Adjacent property owner information and land use information have been summarized in Tables 4 and 5. Land use and zoning information is presented on Figure 3B. 4.0 SOIL ASSESSMENT On November 30, 2021, two damaged/defective UST spill buckets associated with the 1,000-gallon diesel and 1,500-gallon plus gasoline USTs, as well as a suspected release beneath the off-road diesel dispenser were reported at the site. GRI conducted a site check at the subject site on March 16 and March 17, 2022. Two soil samples (Blue-3’ and Yellow-3’) were collected approximately 3 feet BGS adjacent to the non- passing spill buckets and one soil sample (ORD-1) was collected beneath the off-road diesel dispenser. Concentrations of GRO and DRO that exceeded the RALs were reported in the soil sample collected from ORD-1. On April 13, 2022, during the installation of MW-1, two soil samples (MW-1-5’ and MW-1-15’) were collected at 5 and 15 feet BGS, respectively, and were submitted for laboratory analyses of VOCs using EPA Method 8260, SVOCs using EPA Method 8270, and VPH and EPH by the MADEP Methods. The ___________________________________________________________________________________________ Prepared by: Geological Resources, Inc. Comprehensive Site Assessment Report Prepared on: January 31, 2023 Breeden’s 66 Project Manager: William Regenthal, P.G. GRI Project No. 5991 4 reported contaminant concentrations did not exceed the soil-to-water MCCs for the submitted soil samples. During CSA activities, six soil borings (SB-1 through SB-6) were advanced to twenty-five feet BGS, and PID readings were collected every two feet. Fifteen soil samples (SB-2-16’, SB-2-18’, SB-2-20’, SB-2-24’, SB-3- 8’, SB-3-14’, SB-3-16’, SB-3-18’, SB-3-22’, SB-3-24’, SB-4-22’, SB-4-24’, SB-5-18’, SB-5-22’, and SB-5-24’) were collected from the borings and analyzed for TPH-GRO and TPH-DRO using UVF technology. The concentrations of TPH-GRO and/or TPH-DRO reported in SB-3-22’, SB-3-24’, and SB-5-22’ exceeded the RALs. The soil sampling analytical results are presented in Table 6. A Soil Quality Map with the results of the soil sampling in January 2023 is included as Figure 4. The UVF Analytical report is included as Appendix C. A summary of the soil sampling data from the January 2023 CSA activities is shown below: Sample ID Sample Depth (ft-BGS) PID Reading Gasoline-Range TPH Diesel-Range TPH RAL (mg/kg) NE 50 100 SB-2-16' 16 1.0 11.6 5.4 SB-2-18' 18 5.0 <20 4.4 SB-2-20' 20 1.0 <20 4.4 SB-2-24' 24 1.0 24.8 4.0 SB-3-8' 8 1.0 21.6 4.4 SB-3-14' 14 3.0 <10 2.8 SB-3-16' 16 5.0 24.2 4.8 SB-3-18' 18 3.0 <20 5.2 SB-3-22' 22 26.0 641 259 SB-3-24' 24 34.0 79.2 20.8 SB-4-22' 22 4.0 <20 4.0 SB-4-24' 24 3.0 27.6 4.0 SB-5-18' 18 3.0 11.6 2.0 SB-5-22' 22 27.0 78.4 83.6 SB-5-24' 24 38.0 10.2 3.2 5.0 GROUND WATER ASSESSMENT On April 13, 2022, one monitoring well (MW-1) was installed adjacent to the UST basin. Based on the analytical results from the ground water sample collected from MW-1, a High-Risk LSA was required. Three additional Type II monitoring wells (MW-2 through MW-4) were installed, gauged, and sampled on June 23, 2022. Based on the results of LSA activities, additional assessment was required. Between January 3 and January 6, 2023, four additional Type II monitoring wells (MW-5 through MW-8) and one Type III telescoping well (TW-1) were installed as part of CSA activities. Monitoring wells MW-5 through MW-8 were each installed to total depth of 25 feet BGS with a 15-foot screened interval for each well. Telescoping well TW-1 was installed to a total depth of 55 feet BGS with a 5-foot screened interval. ___________________________________________________________________________________________ Prepared by: Geological Resources, Inc. Comprehensive Site Assessment Report Prepared on: January 31, 2023 Breeden’s 66 Project Manager: William Regenthal, P.G. GRI Project No. 5991 5 On January 10, 2023, all wells were gauged, purged, and sampled. The contaminant concentrations of benzene, toluene, xylenes, MTBE, naphthalene, TAA, TBA, n-butylbenzene, isopropylbenzene, n- propylbenzene, 1,2,4-trimethylbenzene, 1-methylnaphthalene, lead, C5-C8 aliphatics, C9-C12 aliphatics, C9-C10 aromatics, and/or C11-C22 aromatics reported in the ground water samples collected from MW- 1 and MW-3 through MW-8 exceeded the MACs. Water supply well WSW-1 could not be sampled because the electricity was cut off and the well was not operating. All contaminant concentrations were below the GCLs. No free product was observed at the site. Based on correspondence with NCDEQ dated January 30, 2023, it was determined that no additional delineation is required at this time. A summary of the January 10, 2023 ground water analytical data is shown below: Contaminant of Concern Benzene Toluene Ethylbenzene Xylenes MTBE Naphthalene Well ID MACs (μg/l) 1 600 600 500 20 6 GCL (μg/l) 5,000 260,000 80,000 50,000 20,000 6,000 MW-1 550 362 361 1,360 864 40.5 MW-2 0.239 J <0.220 <0.170 <0.210 <0.140 <0.470 MW-3 168 1,910 522 2,860 43.3 65 MW-4 0.64 <0.220 <0.170 <0.210 249 <0.470 MW-5 14.6 62.8 68.3 413 15.6 25.5 MW-6 26.0 148.0 48.9 206 38.9 13.5 MW-7 382 2,130 448 2,620 440 157 MW-8 2.28 4.2 4.8 20.7 0.228 J <0.470 TW-1 0.57 0.7 0.473 J 2.03 0.972 J <0.470 All samples were collected in accordance with the NCDEQ guidelines. Clean, disposable bailers and nitrile gloves were used for the collection of the ground water samples. The samples were collected in laboratory supplied containers and shipped to the laboratory in a cooler following proper chain-of-custody procedures. A laboratory supplied trip blank was included in the sample cooler. No detectable concentrations of requested method constituents were reported in the trip blank. The locations of the monitoring wells are shown on Figure 2. The RTEs, well permits, well construction records, and boring logs for the monitoring wells installed during CSA activities are included as Appendix D. Cross sections A-A’ and B-B’ are included as Figures 5 and 6; the lines of cross section are included on Figure 2. A Ground Water Quality Map for the January 2023 ground water sampling event in association with the CSA activities is included as Figure 7. Contaminant-specific isoconcentration maps for benzene, toluene, xylenes, MTBE, and naphthalene are included as Figures 8-13, respectively. A summary of laboratory analyses for the ground water samples collected during CSA activities is included as Table 7. A complete copy of the laboratory report for the ground water samples is included as Appendix E. 6.0 HYDROGEOLOGIC INVESTIGATION ___________________________________________________________________________________________ Prepared by: Geological Resources, Inc. Comprehensive Site Assessment Report Prepared on: January 31, 2023 Breeden’s 66 Project Manager: William Regenthal, P.G. GRI Project No. 5991 6 The depths to ground water in the Type II monitoring wells (MW-1 through MW-8) measured on January 10, 2023, ranged from 17.93 to 20.54 feet below the tops of well casings. Ground water elevations at the site, based on an assumed datum of 100.00 feet assigned to MW-1, ranged from 80.15 to 80.44 feet. Based on this information, the ground water flow direction was generally toward the northeast. The horizontal hydraulic gradient across the site was approximately 0.003 feet per foot. The vertical hydraulic gradient calculated for paired wells MW-1/TW-1 was approximately 0.083 feet per foot in the downward direction. A summary of ground water elevation data obtained during assessment activities to date is presented in Table 8. A Water Table Surface Map based on the January 10, 2023 gauging data is included as Figure 13. Rising head slug tests were conducted in MW-1, MW-8, and TW-1 on January 10, 2023. Hydraulic conductivities in the Type II monitoring wells, calculated using the Bouwer and Rice method, ranged from 3.565 x 10-5 feet per minute (0.0513 feet per day) to 5.749 x 10-4 feet per minute (0.8279 feet per day). The average hydraulic conductivity was 3.053 x 10-4 feet per minute (0.4396 feet per day). Seepage velocities, calculated using the equation V = K(dh/dl)/ne, ranged from 1.03 x 10-3 to 1.66 x 10-2 feet per day (0.375 to 6.04 feet per year). The average seepage velocity was 8.792 x 10-3 feet per day (3.209 feet per year). The hydraulic conductivity in the Type III monitoring well calculated using the Bouwer and Rice method was 7.378 x 10-4 feet per minute (1.062 feet per day). The seepage velocity calculated for the Type III monitoring well was 1.06 x 10-2 feet per day (3.88 feet per year). A summary of the results of slug test analyses is presented in Table 9. Calculations and raw data from the slug tests are included as Appendix F. 7.0 REGIONAL GEOLOGY AND HYDROGEOLOGY According to the 1985 Geologic Map of North Carolina, the site is in the Middendorf Formation. This formation is generally described as coarse detrital sand, sandstone, and mudstone. No bedrock was encountered during monitoring well installation activities. 8.0 SITE GEOLOGY AND HYDROGEOLOGY Based on observations made during assessment activities, surficial soils observed at the site consist of various clays, silts, and sands to 55 feet BGS. A summary of the current ground water gauging data is shown below: Well ID Screened Interval (x to y ft. BGS) Bottom of Well (ft. BGS) Top of Casing Elevation (ft.) Depth to Water from Top of Casing (feet) Free Product Thickness (ft.) Ground Water Elevation (ft.) MW-1 10 - 25 25 100.00 19.58 --- 80.42 MW-2 10 - 25 25 100.98 20.54 --- 80.44 MW-3 10 - 25 25 99.50 19.20 --- 80.30 MW-4 10 - 25 25 100.50 20.07 --- 80.43 MW-5 10 - 25 25 99.13 18.90 --- 80.23 MW-6 10 - 25 25 98.41 18.24 --- 80.17 MW-7 10 - 25 25 98.08 17.93 --- 80.15 MW-8 10 - 25 25 99.98 19.65 --- 80.33 ___________________________________________________________________________________________ Prepared by: Geological Resources, Inc. Comprehensive Site Assessment Report Prepared on: January 31, 2023 Breeden’s 66 Project Manager: William Regenthal, P.G. GRI Project No. 5991 7 TW-1 50 – 55 55 99.81 22.15 --- 77.66 On January 10, 2023, monitoring wells MW-1 through MW-8 and TW-1 were gauged, purged, and sampled. Depths to ground water in the Type II monitoring wells ranged from 17.93 to 20.54 feet below the tops of well casings. Ground water elevations at the site, based on an assumed datum of 100.00 feet assigned to MW-1, ranged from 80.15 to 80.44 feet. Ground water flow was generally toward the northeast. 9.0 DISCUSSION On November 30, 2021, two damaged/defective UST spill buckets associated with the 1,000-gallon diesel and 1,500-gallon plus gasoline USTs, as well as a suspected release beneath the off-road diesel dispenser were reported at the site. GRI conducted a site check at the subject site on March 16 and March 17, 2022, and a release was confirmed on March 18, 2022. To date, eight Type II monitoring wells and one telescoping well have been installed to determine the horizontal and vertical extent of the release. No free product has been observed at the site. All contaminant concentrations are below the GCLs. Based on NCDEQ correspondence dating January 30, 2023, it was determined that the contaminant plume is sufficiently delineated. The risk ranking for the site has been established as High based on MAC exceedances and the presence of active, potable water supply wells within 1,000 feet of the source of contamination. In order to reduce the risk classification, ground water contamination must be remediated to concentrations less than the MACs or the owners of the water supply wells change over to public water and the water supply well (WSW-1) within 250’ must be abandoned. It appears that the plume of contamination is migrating to the northeast, away from all identified water supply wells. GRI recommends conducting comprehensive quarterly ground water sampling events beginning in April 2023. Sampling data can be incorporated into a contaminant Fate and Transport model to make further recommendations towards incident closure. 10.0 CONCLUSIONS AND RECOMMENDATIONS · Ground water elevations at the site, based on an assumed datum of 100.00 feet assigned to MW- 1, ranged from 80.15 to 80.44 feet. Based on this information, the ground water flow direction was generally toward the northeast, away from all identified water supply wells. The horizontal hydraulic gradient across the site was approximately 0.003 feet per foot. The vertical hydraulic gradient calculated for paired wells MW-1/TW-1 was approximately 0.083 feet per foot in the downward direction. · During CSA activities, six soil borings (SB-1 through SB-6) were advanced to twenty-five feet BGS. The concentrations of GRO and/or DRO reported in SB-3-22’, SB-3-24’, and SB-5-22’ exceeded the RALs. · Between January 3 and January 6, 2023, four additional Type II monitoring wells (MW-5 through MW-8) and one Type III telescoping well (TW-1) were installed at the site. · The contaminant concentrations of benzene, toluene, xylenes, MTBE, naphthalene, TAA, TBA, n- butylbenzene, isopropylbenzene, n-propylbenzene, 1,2,4-trimethylbenzene, 1- ___________________________________________________________________________________________ Prepared by: Geological Resources, Inc. Comprehensive Site Assessment Report Prepared on: January 31, 2023 Breeden’s 66 Project Manager: William Regenthal, P.G. GRI Project No. 5991 8 methylnaphthalene, lead, C5-C8 aliphatics, C9-C12 aliphatics, C9-C10 aromatics, and/or C11-C22 aromatics reported in the ground water samples collected from MW-1 and MW-3 through MW-8 exceeded the MACs. All contaminant concentrations were below the GCLs. No free product was observed at the site. · The ground water contaminant plume is defined vertically, as well as horizontally to the west; however, the NCDEQ Incident Manager has determined it to be sufficiently delineated for the site-specific cleanup goals. · Based on this site assessment, the site risk classification should remain High. · GRI recommends conducting comprehensive quarterly ground water sampling events beginning in April 2023. Sampling data can be incorporated into a contaminant Fate and Transport model to make further recommendations towards incident closure. 11.0 PUBLIC NOTICE Copies of the applicable portions of this CSA report have been forwarded to the appropriate local officials by certified mail. Copies of the cover letters are included in Appendix G. 12.0 LIMITATIONS This report has been prepared for the exclusive use of Quality Oil and Gas for specific application to the referenced site in Scotland County, North Carolina. The assessment was conducted based on the scope of work and level of effort desired by the NCDEQ and with resources adequate only for that scope of work. Our findings have been developed in accordance with generally accepted standards of environmental practices in the State of North Carolina, available information, and our professional judgment. No other warranty is expressed or implied. The data that is presented in this report is indicative of conditions that existed at the precise locations sampled and at the time the samples were collected. In addition, the data obtained from samples would be interpreted as being meaningful with respect to parameters indicated in the laboratory report. No additional information can logically be inferred from this data. 13.0 REFERENCES Bouwer, H., 1989, The Bouwer and Rice slug test - an update, Ground Water, vol.27, no. 3, pp.304-309 Bouwer, H. and R.C. Rice, 1976, A slug test method for determining hydraulic conductivity of unconfined aquifers with completely or partially penetrating wells, Water Resources Research, vol. 12, no.3, pp. 423-428 Department of Natural Resources and Community Development, 1985, Geologic Map of North Carolina, 1 sheet Fetter, C. W., 1988, Applied Hydrogeology, Second Edition, Macmillan Publishing Company, 592 p. North Carolina Department of Environment and Natural Resources, 2000, Ground Water Section Guidelines for the Investigation and Remediation of Soil and Ground Water, 79 p. North Carolina Department of Environmental Quality, Division of Waste Management – UST Section Assessment Guidelines: Petroleum and Hazardous Substances UST Releases; Petroleum Non-UST Releases, January 19, 2021 Version ___________________________________________________________________________________________ Prepared by: Geological Resources, Inc. Comprehensive Site Assessment Report Prepared on: January 31, 2023 Breeden’s 66 Project Manager: William Regenthal, P.G. GRI Project No. 5991 9 Site Check Report, Breeden’s 66, Geological Resources, Inc., March 23, 2022 Limited Site Assessment Report, Breeden’s 66, Geological Resources, Inc., July 19, 2022 FIGURES SITE LOCATION Figure 1 Site Location Breeden’s 66 22900 Aberdeen Road Laurinburg, North Carolina Scotland County Incident No. 48332 GRI Project No. 5991 500 M 2000 FT Date: 07/20/2022 Location: 34.865101° N -79.455527° W D a d "J "J "J "J "J SITE 020316 01001 020314 01024 020322 01033 020314 01033 020314 01034 020314 01036020314 01037020314 0103401 WSW-5 WSW-4 WSW-3 WSW-2 WSW-1 Sources: Esri, HERE, Garmin, USGS, Intermap, INCREMENT P, NRCan, Esri Japan, METI, Esri China (Hong Kong), Esri Korea, Esri (Thailand), NGCC, © OpenStreetMap contributors, and the GIS User Community ³ 0 300150 Feet 1 inch = 300 feet BREEDEN'S 66 22900 ABERDEEN ROAD LAURINBURG, SCOTLAND COUNTY NORTH CAROLINA INCIDENT NO. 48332 GRI NO. 5991 PREPARED BY: GEOLOGICAL RESOURCES, INC. APRIL 8, 2022 1,500-FOOT RADIUS 1,000-FOOT RADIUS 250-FOOT RADIUS 500-FOOT RADIUS LEGEND "J Water Supply Well ncrivers Well Owners and Adjacent Properties nc_scotland_parcels_poly FIGURE 3A:SITE VICINITY MAP "J "J "J "J "J SITE WSW-5 WSW-4 WSW-3 WSW-2 WSW-1 Sources: Esri, HERE, Garmin, USGS, Intermap, INCREMENT P, NRCan, Esri Japan, METI, Esri China (Hong Kong), Esri Korea, Esri (Thailand), NGCC, © OpenStreetMap contributors, and the GIS User Community ³ 0 300150 Feet 1 inch = 300 feet FIGURE 3B: ZONING MAP BREEDEN'S 66 22900 ABERDEEN ROAD LAURINBURG, SCOTLAND COUNTY NORTH CAROLINA INCIDENT NO. 48332 GRI NO. 5991 PREPARED BY: GEOLOGICAL RESOURCES, INC. APRIL 8, 2022 1,500-FOOT RADIUS 1,000-FOOT RADIUS 250-FOOT RADIUS 500-FOOT RADIUS LEGEND "J Water Supply Well ncrivers ZONING - R1 ZONING - RA nc_scotland_parcels_poly TABLES UST ID Number 1-5 Facility ID Number Owner or Operator? Owner TABLE 1 UST OWNER/OPERATOR INFORMATION BREEDEN'S 66 (INCIDENT NO. 48332) 00-0-000000347 Address Telephone Number 203 West Broad Avenue, Rockingham, NC 28379 910-997-3101 Name of Owner or Operator Dates of Ownership / Operation 4/4/1968 - CurrentQuality Oil Company Page 1 of 1 Date: 04/28/2022 Facility ID #: 00-0-000000347 Was Release Associated with UST System? (Yes / No) 5 Off-Road Diesel 1,000 4/4/1968 Single Wall Steel 46" x 12' Single Wall FRP Current Yes 4 Diesel 1,000 4/4/1968 Single Wall Steel 46" x 12' Single Wall FRP Current No 3 Gasoline 1,500 4/4/1968 Single Wall Steel 64" x 9' Single Wall FRP Current No 2 Gasoline 1,000 4/4/1968 Single Wall Steel 46" x 12' Single Wall FRP Current No 1 Gasoline 4,000 4/4/1968 Single Wall Steel 64" x 24' Single Wall FRP Current No UST ID No. TABLE 2 UST SYSTEM INFORMATION BREEDEN'S 66 (INCIDENT NO. 48332) Tank Dimensions Description of Associated Product Piping and Pumps Status of UST Current or Most Recent Contents Capacity (gallons) Date Installed Construction Details Page 1 of 1 Well ID. Parcel ID No. Well Owner Mailing Address Well Address Well Status (Active/In-Active) Well Use (Potable / Non- Potable etc.) Municpal Water Available Yes/No Connected to Municipal Water Yes/No Distance from source area of release (ft.) WSW-1 020314 01034 David Breeden 22920 Aberdeen Road, Laurinburg, NC 28352 22920 Aberdeen Road, Laurinburg, NC 28352 In-Active Non-Potable Yes Yes ~180 NW WSW-2 020314 01033 Janet Stack 15900 Monroe Road Laurinburg, NC 28352 15900 Monroe Road Laurinburg, NC 28352 Active Potable Yes No ~460 W WSW-3 020314 01036 Harry E Clark 15825 Monroe Road Laurinburg, NC 28352 15825 Monroe Road Laurinburg, NC 28352 Active Potable No No ~1,060 NW WSW-4 020314 01037 Sharon Monroe 15781 Monroe Road Laurinburg, NC 28352 15781 Monroe Road Laurinburg, NC 28352 Active Potable No No ~1,120 NW WSW-5 020322 01033 Thomas C Tapp Patricia McMillan Tapp 23040 Aberdeen Road Laurinburg, NC 28352 23040 Aberdeen Road Laurinburg, NC 28352 Active Potable No No ~1,070 NW Notes: • Receptors are shown on Figure 3A. • N/A: Not Applicable. TABLE 3 RECEPTOR INFORMATION BREEDEN'S 66 (INCIDENT NO. 48332) Date: 04/28/22 Well Construction Details (Depth, Screened Interval, Type of Well, ect.) Facility ID #: 00-0-000000347 Unknown Unknown Unknown Unknown Unknown Page 1 of 1 Date: 04/28/22 Facility ID #: 00-0-000000347 PIN Number Property Owner Name Property Owner Address 020314 0103401 (site)S & H Rental Inc. P.O. Box 2048 Raeford, NC 28376 020314 01034 020314 01039 020314 01033 Janet Stack 15900 Monroe Road Laurinburg, NC 28352 020314 01024 020316 01001 Note: • Properties are keyed to Figure 3a. TABLE 4 ADJACENT PROPERTY OWNER INFORMATION BREEDEN'S 66 (INCIDENT NO. 48332) Howell Land Co. 2 LLC.P.O. Box 1151, Laurinburg, NC 28353 David Breeden 22900 Aberdeen Road Laurinburg, NC 28352 Page 1 of 1 Date: 07/19/22 Map ID No. Land Use Feature Zoning Description Address Distance from Source Area (feet) N/A RA Residential Agricultural N/A ~50 N/A R-1 Residential 15900 Monroe Road, Laurinburg, NC 28355 ~1,030 Note: • Properties are keyed to Figure 3B. TABLE 5 LAND USE INFORMATION BREEDEN'S 66 (INCIDENT NO. 48332) Facility ID #: 00-0-000000347 Page 1 of 1 Date: 01/30/2023 UVF UVF Sample IDDate Collected (mm/dd/yy)Sample Depth(ft-BGS)Gasoline-Range TPHDiesel-Range TPHBenzeneMTBE2-Butanone (MEK)50 100 NE NE NE NE NE 0.0072 0.085 16 NE NE 12 156 9,380 ORD-1 03/16/22 1 1,864 1,820 NR NR NR Yellow-3'03/17/22 3 13.2 18 NR NR NR Blue-3'03/17/22 3 14 36 NR NR NR MW-1-5'04/13/22 5 NR NR <0.0013 <0.0077 <0.0011 MW-1-15'04/13/22 15 NR NR 0.0020 J 0.0124 J 0.0071 SB-2-16'01/05/23 16 11.6 5.4 NR NR NR SB-2-18'01/05/23 18 <20 4.4 NR NR NR SB-2-20'01/05/23 20 <20 4.4 NR NR NR SB-2-24'01/05/23 24 24.8 4.0 NR NR NR SB-3-8'01/05/23 8 21.6 4.4 NR NR NR SB-3-14'01/05/23 14 <10 2.8 NR NR NR SB-3-16'01/05/23 16 24.2 4.8 NR NR NR SB-3-18'01/05/23 18 <20 5.2 NR NR NR SB-3-22'01/05/23 22 641 259 NR NR NR SB-3-24'01/05/23 24 79.2 20.8 NR NR NR SB-4-22'01/05/23 22 <20 4.0 NR NR NR SB-4-24'01/05/23 24 27.6 4.0 NR NR NR SB-5-18'01/05/23 18 11.6 2.0 NR NR NR SB-5-22'01/05/23 22 78.4 83.6 NR NR NR SB-5-24' 01/05/23 24 10.2 3.2 NR NR NR Notes: • UVF: Ultraviolet Fluorescent technology • Results reported in mg/kg (milligrams per kilograms) • ft-BGS: feet below ground surface. • RAL: Regulatory Action Level. • MCCs: Maximum Contaminant Concentrations (soil). • SCLs: Soil Cleanup Levels. • < : Less than the method detection limit specified in the laboratory report • Concentrations in bold face type indicate the reported concentrations exceeded the soil-to-water MCCs. • Concentrations in italics indicate reported concentration exceeded the residential SCLs. • NE: Not Established • NR: Not Requested. RAL (mg/kg) Soil to Water MCC (mg/kg) Residential SCLs (mg/kg) TABLE 6 SUMMARY OF SOIL SAMPLE ANALYTICAL RESULTS BREEDEN'S 66 (INCIDENT NO. 48332) Analytical Method 8260 Facility ID #: 00-0-000000347 Page 1 of 1 Date: 01/30/2023 EPA 504.1 EPA 6010 Well ID Date Sampled (mm/dd/yy) 1 600 600 500 20 6 40 10 70 70 70 400 400 0.02 1 30 15 400 700 200 700 10,000 200 5,000 260,000 80,000 50,000 20,000 6,000 40,000 10,000 5,900 30,500 26,100 28,500 24,100 50 1,000 12,000 15,000 NE NE NE NE NE NE 04/13/22 303 180 170 420 419 27.9 266 <20 6.2 16.9 33.6 120 70.2 <0.018 3.9 J 7.4 212 662 61.5 J 365 <50 <50 172 J 01/10/23 550 362 361 1,360 864 40.5 1,350 187 9.97 22.2 40.6 343 150 NR NR NR NR NR NR NR NR NR NR 06/23/22 <0.180 <0.220 <0.170 <0.210 <0.140 <0.470 <1.90 <1.60 <0.180 <0.180 <0.190 <0.190 <0.180 0.0219 <1.27 <7.96 0.049 <11.5 <25.8 <4.02 <38.1 <168 <82.7 01/10/23 0.239 J <0.220 <0.170 <0.210 <0.140 <0.470 <1.90 6.00 J <0.180 <0.180 <0.190 <0.190 <0.180 NR NR NR NR NR NR NR NR NR NR 06/23/22 587 15,500 3,680 20,000 111 851 <190 <160 61.3 251 760 5,520 1,550 0.0360 66.5 132 0.269 23,400 15,900 12,400 783 <177 771 01/10/23 168 1,910 522 2,860 43.3 65 76.1 18.6 81.8 34.3 92.3 810 251 NR NR NR NR NR NR NR NR NR NR 06/23/22 2.08 52.6 17.8 102 175 <0.470 <1.90 <1.60 1.25 1.99 6.98 52.9 15.5 0.0407 1.64 J <8.51 0.022 412 332 429 <36.4 <160 <79.1 01/10/23 0.64 <0.220 <0.170 <0.210 249 <0.470 68.8 15.6 <0.180 <0.180 <0.190 <0.190 <0.180 NR NR NR NR NR NR NR NR NR NR MW-5 01/10/23 14.6 62.8 68.3 413 15.6 25.5 98.2 88.6 2.1 4.67 8.63 109 28.9 <0.00337 2.63 5.05 <10.0 545 644 475 NA*NA*NA* MW-6 01/10/23 26.0 148.0 48.9 206 38.9 13.5 71.8 15.7 0.319 J 3.90 4.60 44.7 9.10 <0.00342 <1.26 1.53 J 18.9 266 189 114 <29.4 <129 <63.6 MW-7 01/10/23 382 2,130 448 2,620 440 157 532 J 139 4.96 19.1 37.4 594 171 0.0133 JQ 8.67 15.3 <10.0 1,550 1,060 1,240 58.1 J <124 208 MW-8 01/10/23 2.28 4.2 4.8 20.7 0.228 J <0.470 <1.90 4.44 J <0.180 0.364 J 0.89 5.61 2.30 <0.00333 <1.17 <0.682 34.8 <11.5 55.3 J 13.6 J NA*NA*NA* TW-1 01/10/23 0.57 0.7 0.473 J 2.03 0.972 J <0.470 3.08 J 5.47 J <0.180 <0.180 <0.190 0.918 0.305 J <0.00343 <1.26 <0.735 <10.0 <11.5 <25.8 <4.02 <29.1 <128 <63.2 06/23/22 <0.180 <0.220 <0.170 <0.210 <0.140 <0.470 NR NA <0.180 <0.180 <0.190 <0.190 <0.180 NR NR NR NR NR NR NR NR NR NR 01/10/23 <0.180 <0.220 <0.170 <0.210 <0.140 <0.470 <1.90 <1.60 <0.180 <0.180 <0.190 <0.190 <0.180 NR NR NR NR NR NR NR NR NR NR Notes: • Results reported in micrograms per liter (µg/l). • MAC: Maximum Allowable Concentration as specified in T15A NCAC 2L.0202. • 2B Standard: North Carolina surface water standards for Class C waters specified in T15A NCAC 2B.0200 or EPA Nathional Criteria. • < : Less than the method detection limit specified in the laboratory report. • GCL: Gross contamination level. • Concentrations in bold face type indicate the reported contaminant concentration exceeded the MAC. • Results in italics indicate the reported contaminant concentration exceeded the GCL. • J: Estimated value. • J: Relative percent difference >40% dual column results. • NE: Not established. • NA: Not analyzed. • NR: Not reported. • Refer to laboratory report for other detectable concentrations which did not exceed the MAC. • *Analysis of MADEP EPH was not performed on the ground water samples collected on 01/10/23 from MW-5 and MW-8 due to limited volume. GCL (μg/l)MTBENaphthaleneContaminant of Concern MAC (μg/l)1-Methylnaphthalenetert-Amyl alcohol(TAA)BenzeneTolueneEthylbenzene1,3,5-Trimethylbenzene1,2,4-TrimethylbenzeneEDBn-PropylbenzeneIsopropylbenzenetert-Butyl alcohol(TBA)n-ButylbenzeneMADEP EPH C9-C18 AliphaticsC19-C36 AliphaticsC11-C22 AromaticsTABLE 7 SUMMARY OF GROUND WATER SAMPLE ANALYTICAL RESULTS BREEDEN'S 66 (INCIDENT NO. 48332) Facility ID #: 00-0-000000347 XylenesC9-C10 AromaticsC9-C12 AliphaticsAnalytical Method MADEP VPHEPA 625.1 LeadC5-C8 Aliphatics2-MethylnaphthaleneEPA 6200B MW-1 MW-2 MW-3 MW-4 Trip Blank Page 1 of 1 Date: 01/26/23 Well ID Date Installed (mm/dd/yy) Date Water Level Measured (mm/dd/yy) Well Casing Depth (ft. BGS) Screened Interval (x to y ft. BGS) Bottom of Well (ft. BGS) Top of Casing Elevation (ft.) Depth to Water from Top of Casing (ft.) Free Product Thickness (ft.) Groundwater Elevation (ft.) Comments 04/13/22 16.79 ---83.21 06/23/22 17.53 ---82.47 01/10/23 19.58 ---80.42 06/23/22 19.03 ---81.95 01/10/23 20.54 ---80.44 06/23/22 17.72 ---81.78 01/10/23 19.20 ---80.30 06/23/22 18.41 ---82.09 01/10/23 20.07 ---80.43 MW-5 01/03/23 01/10/23 10 10-25 25 99.13 18.90 ---80.23 MW-6 01/04/23 01/10/23 10 10-25 25 98.41 18.24 ---80.17 MW-7 01/04/23 01/10/23 10 10-25 25 98.08 17.93 ---80.15 MW-8 01/05/23 01/10/23 10 10-25 25 99.98 19.65 ---80.33 TW-1 01/06/23 01/10/23 10 50-55 55 99.81 22.15 ---77.66 Notes: • ft BGS : feet below ground surface. • NA: Not available. • NM: Not measured. 10 10 10 04/13/22 06/23/22 06/23/22 100.50 100.00 100.98 99.50 10-25 10-25 10-25 10-25 25 25 25 25MW-4 06/23/22 MW-1 MW-2 MW-3 TABLE 8 WELL CONSTRUCTION AND GAUGING INFORMATION BREEDEN'S 66 (INCIDENT NO. 48332) Facility ID #: 00-0-000000347 10 Page 1 of 1 Facility ID#: 0-000347 ft/min ft/day ft/day ft/year MW-1 3.565E-05 5.134E-02 1.03E-03 3.75E-01 MW-8 5.749E-04 8.279E-01 1.66E-02 6.04E+00 Averages 3.053E-04 4.396E-01 8.792E-03 3.209E+00 TW-1 7.378E-04 1.062E+00 1.06E-02 3.88E+00 Note: Seepage velocities calculated using the equation v = K(dh/dl)/ne , where: K = hydraulic conductivity ne = effective porosity = 0.15 for the Type II wells; 0.30 for Type III well dh/dl = hydraulic gradient = 0.003 ft/ft TABLE 9 SUMMARY OF SLUG TEST ANALYSES BREEDEN'S 66 (INCIDENT NO. 48332) Date : 01/30/23 Well Hydraulic Conductivity (K)Seepage Velocity (v) Page 1 of 1 APPENDICES APPENDIX A State Correspondence 5991 Received AUG 18 2022 5991 Received OCT 24 202 5991 Received NOV 15 2022 APPENDIX B Site-Specific Health and Safety Plan 1 GEOLOGICAL RESOURCES, INC. Site Specific Health and Safety Plan 1.0 General Information: a. Project name: Breeden’s 66 b. Location: 22900 Aberdeen Road, Laurinburg, Scotland County c. GRI Job #: 5991 2.0 Project Organization: a. Site Supervisor/H&S Officer: b. Project Manager: William Regenthal c. Subcontractor(s): 3.0 Safety Plan Preparation: a. Prepared by &