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HomeMy WebLinkAboutRA-834_5665_CA_MRP_20231027 ENVIRONMENTAL | CIVIL | GEOTECHNICAL MONITORING REPORT OXFORD COMMONS SHOPPING CENTER 3500 N. ROXBORO STREET DURHAM, DURHAM COUNTY, NC NCDEQ INCIDENT NO. 5665 RISK CLASSIFICATION: L035E OCTOBER 27, 2023 NCDEQ CONTRACT NO. N70522-A TASK AUTHORIZATION NO. 01 CATLIN PROJECT NO. 221073 PREPARED FOR: MS. LINDA BLALOCK NCDEQ, DWM, UST SECTION 1646 MAIL SERVICE CENTER RALEIGH, NC 27699-1646 PREPARED BY: CATLIN ENGINEERS AND SCIENTISTS 220 OLD DAIRY ROAD WILMINGTON, NC 28405 (910) 452-5861 CORPORATE LICENSURE NO. FOR ENGINEERING SERVICES C-0585 CORPORATE LICENSURE NO. FOR GEOLOGY SERVICES C-118 NCDEQ; 5665_Oxford Commons Shopping Center.doc CATLIN Engineers and Scientists CATLIN Project No. 221073 October 2023 TABLE OF CONTENTS PAGE 1.0 SITE INFORMATION 1 2.0 EXECUTIVE SUMMARY 2 3.0 SCOPE OF SERVICES 2 4.0 SITE HISTORY AND CHARACTERIZATION 3 4.1 UST OWNER AND OPERATOR INFORMATION 3 4.2 UST INFORMATION 3 4.3 CONTAMINANT SOURCE INVENTORY 3 4.4 SITE CHARACTERISTICS 4 4.5 OWNERS AND OCCUPANTS OF ADJOINING/NEARBY PROPERTIES AND LAND USE 4 4.6 RECEPTOR INFORMATION 4 4.7 PREVIOUS INVESTIGATIONS AND REMEDIAL ACTIVITIES 4 5.0 REGIONAL AND SITE GEOLOGY AND HYDROGEOLOGY 5 5.1 SOIL AND BEDROCK 5 5.2 HYDROGEOLOGY 6 6.0 SITE ASSESSMENT INFORMATION 6 6.1 MONITORING WELL INSTALLATION 6 6.2 GAUGING DATA 7 6.3 SAMPLING DATA 7 6.4 SUMMARY OF GROUNDWATER INFORMATION 8 6.5 EVALUATION OF ASSESSMENT INFORMATION 9 7.0 CONCLUSIONS AND RECOMMENDATIONS 9 8.0 LIMITATIONS 10 9.0 STATEMENTS AND CERTIFICATION 11 10.0 REFERENCES 11 NCDEQ; 5665_Oxford Commons Shopping Center.doc CATLIN Engineers and Scientists CATLIN Project No. 221073 October 2023 TABLES TABLE 1 SITE HISTORY – UST AND AST SYSTEMS AND OTHER RELEASE INFORMATION TABLE 2 PUBLIC AND PRIVATE WATER SUPPLY WELLS AND OTHER RECEPTOR INFORMATION TABLE 3 WELL CONSTRUCTION AND HISTORICAL WATER LEVEL GAUGING DATA TABLE 4 SUMMARY OF GROUNDWATER LABORATORY RESULTS – STANDARD METHOD 6200B TABLE 5 SUMMARY OF HISTORICAL GROUNDWATER LABORATORY RESULTS – STANDARD METHOD 6200B FIGURES FIGURE 1 SITE VICINITY MAP FIGURE 2 POTENTIAL RECEPTOR MAP FIGURE 3 SITE MAP FIGURE 4 GROUNDWATER ELEVATION – SEPTEMBER 26, 2023 FIGURE 5 MONITORING WELL GROUNDWATER SAMPLE ANALYTICAL RESULTS – SEPTEMBER 26, 2023 APPENDICES APPENDIX A HISTORICAL DATA APPENDIX B SITE PHOTOGRAPHS APPENDIX C DAILY ACTIVITIES LOGS, FINAL TOC SURVEY, AND FIELD DATA SHEET APPENDIX D WELL LOG AND WELL CONSTRUCTION RECORD APPENDIX E LABORATORY ANALYTICAL REPORT AND CHAIN OF CUSTODY DOCUMENT NCDEQ; 5665_Oxford Commons Shopping Center.doc CATLIN Engineers and Scientists CATLIN Project No. 221073 1 October 2023 1.0 SITE INFORMATION Site Identification Date: 10/27/2023 Site Risk/Priority Rank: L035 UST Number: RA-834 Incident Number: 5665 Site Name: Oxford Commons Shopping Center Facility ID: Unknown Site Location: 3500 North Roxboro Street Nearest City/Town: Durham County: Durham Description of Geographical Data Point: Former UST basin Location Method: Google Earth Latitude (decimal degrees): 36.0359° Longitude (decimal degrees): -78.8926° Contacts Information UST Owner: Multiple Owners/Operators (See Table 1) Address: N/A Phone: N/A UST Operator: Multiple Owners/Operators (See Table 1) Address: N/A Phone: N/A Property Owner: Store Master Funding XXI, LLC Address: 8377 E. Hartford Dr., Ste. 100, Scottsdale, AZ Phone: N/A Property Occupant: Caliber Car Wash under construction Address: 3500 N. Roxboro St., Durham, NC 27704 Phone: N/A Consultant: CATLIN Engineers and Scientists Address: 220 Old Dairy Rd., Wilmington, NC 28405 Phone: (910) 452-5861 Corporate Licensure No. For Engineering Services: C-0585 Corporate Geology License No.: C-118 Analytical Laboratory: Con-Test Analytical Laboratory State Certification: NC 652, NC-DW 25703 Address: 39 Spruce St., E. Longmeadow, MA 01028 Phone: (413) 525-2332 Release Information Date Discovered: 05/13/1991 Estimated Quantity of Release: Unknown Cause of Release: Leak in the UST system Source of Release: UST system or associated fitting(s) Sizes and contents of UST system(s) from which the release occurred: • One 1,000-gallon heating oil UST • One 560-gallon heating oil AST • Two 10,000-gallon gasoline USTs • One 400-gallon gasoline UST NCDEQ; 5665_Oxford Commons Shopping Center.doc CATLIN Engineers and Scientists CATLIN Project No. 221073 2 October 2023 2.0 EXECUTIVE SUMMARY The Oxford Commons Shopping Center (Oxford Commons) site is located at 3500 N. Roxboro St., Durham, North Carolina. Four underground storage tanks (USTs) and one aboveground storage tank (AST) previously operated at the site. One 1,000-gallon heating oil UST and one 560-gallon heating oil AST, used for residential heating, were removed in January 1990. One 400-gallon gasoline and two 10,000-gallon gasoline USTs, formerly used for petroleum retail, were removed from the site in 1991. A petroleum release was discovered during tank closure activities. Currently, a Caliber Car Wash facility is being constructed on site. The purpose of this report is to document the latest monitoring well installation and groundwater sampling activities. On September 21, 2023, CATLIN Engineers and Scientists (CATLIN) personnel advanced a boring for construction of a Type II monitoring well (MW-12R) to 35 feet below land surface (BLS). On September 26, 2023, CATLIN returned to the site to gauge and sample the newly installed monitoring well MW-12R. Depth to groundwater was gauged at 26.09 feet deep. A groundwater sample was collected from MW-12R and submitted for laboratory analysis of volatile organic compounds (VOCs) per Standard Method (SM) 6200B plus ethylene dibromide (EDB), methyl tert-butyl ether (MTBE), and diisopropyl ether (DIPE). Laboratory results indicated the presence of several dissolved petroleum constituents at concentrations greater than those established in Title 15A of the North Carolina Administrative Code, Subchapter 2L, Section .0202 Groundwater Quality Standards (2L GWQS). Benzene detected above its Gross Contaminant Levels (GCL) in sample from MW-12R. Dissolved petroleum constituent concentrations appear to have decreased slightly in the samples from monitoring well MW-12 and MW-12R (which was installed to replace the damaged MW-12) since March 2022 (CATLIN, 2022). CATLIN recommends to: • Install a Provectus ORS sleeve into monitoring well MW-12R; and • Sample MW-12R approximately 4 months after installation. 3.0 SCOPE OF SERVICES The scope of services for this report was performed in general accordance with CATLIN proposal number 221073.1P, dated August 14, 2023. Services were authorized by the North Carolina Department of Environmental Quality’s (NCDEQ’s) Task Authorization (TA) #01 Change Order 01, accepted on June 22, 2023, and Contract Number N70522-A. The approved scope of services for this Task Authorization included to: • Install a replacement Type II monitoring well (MW-12R) up to 35 feet BLS; • Collect a groundwater sample from newly installed monitoring well MW-12R; NCDEQ; 5665_Oxford Commons Shopping Center.doc CATLIN Engineers and Scientists CATLIN Project No. 221073 3 October 2023 • Analyze one monitoring well sample, one equipment rinsate blank sample, and one trip blank sample per SM 6200B including EDB, MTBE, and DIPE; and • Prepare a monitoring report documenting the findings. The original TA01 (prepared on June 21, 2023 and accepted on June 22, 2023) authorized installation of a replacement well (MW-12R) to 20 feet BLS. This well was installed on August 17, 2023 but was found to be dry. The change order provided for additional footage to install a deeper well. The scope of services was conducted in general accordance with the approved TA Change Order. 4.0 SITE HISTORY AND CHARACTERIZATION The Oxford Commons site is located at 3500 N. Roxboro St., Durham, North Carolina (Figures 1 and 2). Summarized available historical sampling and gauging data are provided in Appendix A. Site photographs are presented in Appendix B. 4.1 UST OWNER AND OPERATOR INFORMATION Multiple people owned and operated the four USTs and one AST historically present on-site between 1939 and 1977. A former residential structure used one 1,000-gallon UST and one 560-gallon AST for heating oil. The 400-gallon gasoline and two 10,000-gallon gasoline USTs were operated for petroleum retail distribution (former Braggtown Amoco). The site was accepted into the North Carolina UST Section Trust Fund Branch State Lead Program in 1995 (H&H, 2020). Available information regarding UST owners and operators is presented in Table 1. 4.2 UST INFORMATION Reportedly, one 1,000-gallon heating oil UST, one 560-gallon heating oil AST, one 400-gallon gasoline UST, and two 10,000-gallon gasoline USTs were previously operated on-site. The installation dates of the tanks are unknown. The heating oil tanks, assumed to be in a similar location, were removed from the site in January 1990 and the gasoline tanks were removed in May 1991 (H&H, 2020; S&ME, 2019). Available UST and AST system information is presented in Table 1 and the approximate former UST basin locations are illustrated on Figure 3. 4.3 CONTAMINANT SOURCE INVENTORY An on-site release was discovered in 1991 during UST removal activities. Soil sample analytical results revealed total petroleum hydrocarbons (TPH) above State Action Levels (S&ME, 2019). NCDEQ; 5665_Oxford Commons Shopping Center.doc CATLIN Engineers and Scientists CATLIN Project No. 221073 4 October 2023 4.4 SITE CHARACTERISTICS The property is owned by Store Master Funding, LLC and is leased by Caliber Car Wash. Currently, the site is being redeveloped into a car washing facility. Site photographs are presented in Appendix B. 4.5 OWNERS AND OCCUPANTS OF ADJOINING/NEARBY PROPERTIES AND LAND USE Properties in the site vicinity are mostly commercial businesses. The site is bound by N. Roxboro Street to the southwest and Oxford Street to the southeast. A large parking lot associated with a shopping center is located to the northeast and various businesses are located to the northwest and south (across N. Roxboro and Oxford Streets). 4.6 RECEPTOR INFORMATION Conducting a receptor survey was outside the scope of this monitoring event. A review of historical files available on the NCDEQ Waste Management Online Database (aka Laserfiche) indicates that the last receptor survey for the Oxford Commons site was conducted in 2018 by S&ME, Inc. (S&ME). According to previous reports, municipal water is available to the site vicinity. No water supply wells have been identified within 1,500 feet of the site. One surface water body is located within 1,500 feet of the site. A retention pond is located 1,500 feet southwest from the site. Potential receptors are illustrated on Figure 2 and receptor information obtained from S&ME (2019) is shown on Table 2. 4.7 PREVIOUS INVESTIGATIONS AND REMEDIAL ACTIVITIES Historical files available on Laserfiche do not fully detail the site history. A summary of on-site investigations and remedial activities indicated in previous reports is provided herein. The release was discovered in 1991 during UST closure activities when staining and a petroleum odor were observed in the excavated soils (S&ME, 2019). Testing of the soil samples obtained during UST excavation activities revealed TPH gasoline range organics (GRO) up to 2,000 milligrams per kilogram (mg/kg) (S&ME, 2011). Environmental Investigation, P.A. (EI) conducted Comprehensive Site Assessment (CSA) activities in 1994. Soil samples obtained from near the tank pit reportedly contained TPH GRO and diesel range organics (DRO) above the State Action Levels. EI estimated there was approximately 1,461 cubic yards of impacted soil in the vicinities of the former fuel dispenser NCDEQ; 5665_Oxford Commons Shopping Center.doc CATLIN Engineers and Scientists CATLIN Project No. 221073 5 October 2023 island and UST basins at depths generally between six and 17 feet BLS. Five of the soil borings were later converted into monitoring wells (S&ME, 2019). S&ME, Inc. conducted multiple monitoring events in 2011, 2018, and 2019. Groundwater analytical results reported persistent contaminant concentrations above 2L GWQS in monitoring wells MW-9, MW-10, and MW-12. Benzene was reported up to 11,000 micrograms per liter (µg/L) in samples from MW-12, significantly over the GCL of 5,000 µg/L. During the sampling events, targeted analytes were not detected over their 2L GWQS in samples from MW-2, MW-3, MW-5, MW-8, MW-10D, or MW-11 (S&ME, 2019). A Limited Site Assessment (LSA) dated May 12, 2020 was submitted by Hart & Hickman (H&H). Soil assessment and vapor intrusion activities were conducted at the site as part of the LSA investigation. Semi-VOCs (SVOCs) were detected above the method detection limits (MDLs) but below Residential Maximum Soil Contaminant Concentrations (MSCCs). Low levels of metals were detected in the soil samples but were within limits of estimated background levels. Analysis of soil gas samples revealed no compounds exceeded the Non-Residential Soil Gas Screening Levels and risk calculations indicated an acceptable risk of soil gas to indoor air vapor intrusion for non-residential workers (H&H, 2020). CATLIN conducted a groundwater sampling event in March 2022. Samples were collected from monitoring wells MW-2, MW-4, MW-5, MW-9, MW-10, MW-10D, and MW-12. Multiple VOCs were detected in the MW-10, MW-10D, and MW-12 samples at concentrations above 2L GWQS. Benzene was also detected above its GCL in the sample from MW-12. Due to the location of MW-10 and MW-10D and on-going site construction, these wells were abandoned (CATLIN, 2022). In February 2023, CATLIN attempted to sample monitoring well MW-12. However, it was discovered that MW-12 (and MW-1) were destroyed during construction and landscaping (CATLIN, 2023). Summarized available historical sampling and gauging data conducted by others are provided in Appendix A. 5.0 REGIONAL AND SITE GEOLOGY AND HYDROGEOLOGY 5.1 SOIL AND BEDROCK As defined in the Geologic Map of North Carolina, published by the North Carolina Department of Natural Resources and Community Development (1985), the site lies within the Piedmont physiographic province. NCDEQ; 5665_Oxford Commons Shopping Center.doc CATLIN Engineers and Scientists CATLIN Project No. 221073 6 October 2023 The site is underlain by the Diabase formation within the Triassic Basins and Durham-Sanford Subbasins. According to the 1985 Geologic Map of North Carolina, intrusive rocks crop out in the site area. Boring logs prepared by Wilson Engineering Associates, Inc. (WAE) (1991) indicate that silty clay is present to approximately five feet BLS. Sandy silt was encountered from approximately 5 to 15 feet BLS. Weathered siltstone was observed below 15 BLS. Boring logs prepared by CATLIN for monitoring well MW-12R indicate that orange-tan sandy silt is present to approximately six feet BLS, and gray-dark gray silt is present from 6-35 feet BLS. The boring log from MW-12R is included in Appendix D. 5.2 HYDROGEOLOGY Groundwater - The 2020 Visual Hydrogeologic Framework (VHF) – North Carolina Hydrogeological Database did not identify sufficient boreholes near the site to draw a cross-section. Surface Water – One surface water body is located within 1,500 feet of the site. A retention pond (made from a former rock quarry) is located 1,500 feet southwest from the site. 6.0 SITE ASSESSMENT INFORMATION CATLIN conducted field activities in general accordance with the approved TA. Each day upon arrival at the site, safety briefings were conducted and potential hazards were evaluated before beginning field work. Daily Activities Logs are included in Appendix C. Photographs from the site visits are included in Appendix B. Well locations and site features are shown on Figure 3 and well construction details are presented in Table 3. 6.1 MONITORING WELL INSTALLATION On September 21, 2023, a boring was advanced to 35 feet BLS for monitoring well construction by a North Carolina Certified Well Contractor, utilizing hollow stem augers and a B-57 Mobil drill rig. Cuttings generated during drilling activities were spread on-site. The well (MW-12R) was constructed of new, threaded PVC casing and screen. No glues or cements were used in joining PVC components. New nitrile gloves were worn while handling all well materials. The monitoring well was constructed with a pointed PVC sediment trap, 15 feet of 2-inch diameter, 0.010-inch slotted PVC well screen and approximately 20 feet of 2-inch diameter solid PVC riser to the surface. The annular space was filled with coarse sand pack to approximately two feet above the well screen and bentonite chips from 16 to 18 feet BLS. The bentonite chips were poured NCDEQ; 5665_Oxford Commons Shopping Center.doc CATLIN Engineers and Scientists CATLIN Project No. 221073 7 October 2023 from the surface while simultaneously pouring water to facilitate hydration. Grout was installed to within one foot of the ground surface. The well was finished with concrete to just below the surface. The well was completed with a locking well cap, a flush-mount steel wellhead, and a concrete pad. The top of casing (TOC) elevation was surveyed in reference to a known well elevation (MW-09) using traditional rod and level techniques. Monitoring well construction information is summarized in Table 3 and a site map with monitoring well location is illustrated on Figure 3. Site photographs are presented in Appendix B. The final TOC survey is included in Appendix C. The well log and Well Construction Record were submitted to the NCDEQ Division of Water Quality and copies are provided in Appendix D. 6.2 GAUGING DATA Historically, depth to water has ranged from 2.78 feet below top of casing (BTOC) (MW-8) to 24.60 feet BTOC (MW-12). Groundwater flow direction has been previously illustrated towards the northeast (S&ME, 2019). During the September 2023 sampling event, CATLIN personnel measured the depth to water in MW-12R using an electronic water interface probe. To prevent cross contamination, the probe and cabling were decontaminated according to manufacturer’s recommendations after use in the well. Gauging data was recorded on an electronic groundwater sampling form using a tablet device. Gauging procedures were performed in general accordance with North Carolina Department of Environmental and Natural Resources (NCDENR) and NCDEQ Guidelines, and Environmental Protection Agency (EPA) Region 4 Operating Procedures. Depth to water in MW-12R was gauged at 26.09 BTOC. Groundwater flow direction was not able to be calculated due to a lack of data points, but historically has been shown to be toward the north. Monitoring well gauging results for events conducted by CATLIN are presented in Table 3. Groundwater elevation is illustrated on Figure 4 and the field data sheet is provided in Appendix C. 6.3 SAMPLING DATA Following gauging, the monitoring well was sampled in general accordance with NCDENR and NCDEQ Guidelines and EPA Region 4 Operating Procedures. Monitoring well MW-12R was not developed after installation, so five well volumes were removed prior to sampling. The well was bailed dry several times during purging and the groundwater recharge rate was extremely slow. Significant time was allowed after development for water to accumulate in the well. Because of the development and subsequent slow recharge rate, monitoring well groundwater field parameter data were not NCDEQ; 5665_Oxford Commons Shopping Center.doc CATLIN Engineers and Scientists CATLIN Project No. 221073 8 October 2023 collected for this well. A copy of the field data sheet is available in Appendix C. After five well volumes were removed (and the well was bailed dry several times) and sufficient volume recharged, a groundwater sample was collected from the well and poured directly into appropriate, laboratory-provided, pre-preserved glassware, labeled, and placed on ice in an insulated cooler. A laboratory-provided trip blank was maintained in the cooler for the duration of the event. To verify that sampling equipment was decontaminated sufficiently, an equipment rinsate blank sample was collected from the electronic probe. Clean distilled water was allowed to cascade down the electronic probe and into appropriate laboratory-provided, pre-preserved glassware. The glassware was labeled and placed on ice in an insulated cooler. The monitoring well sample, equipment rinsate blank, and a laboratory-provided trip blank were submitted to Con-Test Analytical Laboratory (Certification NC 652 and NC-DW 25703) in East Longmeadow, Massachusetts, under proper chain of custody (COC) protocol and analyzed per SM 6200B including EDB, MTBE, and DIPE. 6.4 SUMMARY OF GROUNDWATER INFORMATION Historically, samples from monitoring wells MW-9, MW-10, and MW-12 have contained the highest petroleum constituent concentrations. During the previous sampling event conducted by CATLIN (2022), samples from MW-10 and MW-12 contained multiple VOCs at concentrations above the 2L GWQS. Additionally, the sample from MW-12 had a benzene concentration which exceeded its GCL. Summarized available historical sampling and gauging data collected by others are provided in Appendix A. The latest groundwater sampling laboratory results for SM 6200B analysis are summarized in Table 4. Historical results for events conducted by CATLIN are in Table 5. Monitoring well sample analytical results are illustrated on Figure 5. A copy of the complete laboratory reports and COC documentation are in Appendix E. Monitoring Wells During the September 2023 monitoring event, one monitoring well groundwater sample (MW-12R) was collected and submitted for analysis via SM 6200B including EDB, MTBE, and DIPE. Laboratory analysis detected several constituents above their 2L GWQS in the sample. Estimated concentrations (“J”-values) of several analytes were detected above their respective MDLs but below their 2L GWQS, and benzene was detected at a concentration above its GCL. NCDEQ; 5665_Oxford Commons Shopping Center.doc CATLIN Engineers and Scientists CATLIN Project No. 221073 9 October 2023 Equipment Rinsate Blank and Trip Blank One equipment rinsate blank and one laboratory-provided trip blank were submitted for analysis per SM 6200B including EDB, MTBE, and DIPE. Concentrations of bromodichloromethane and chloroform were detected in the equipment blank (EB) above their MDLs; a 2L GWQS has not been established for bromodichloromethane and the chloroform detection was significantly below its 2L GWQS. No additional targeted analytes were detected in either sample. 6.5 EVALUATION OF ASSESSMENT INFORMATION Extent of Contamination Several petroleum constituents were detected above their respective 2L GWQS in samples from MW-12R. Additionally, benzene was reported above GCL in this sample. A summary of monitoring well groundwater sample analytical results is illustrated on Figure 5. The dissolved phase contaminant plume is horizontally delineated to the east and west, but not the north or south. The plume has not been vertically delineated in the vicinity of MW-12R. The highest dissolved phase concentrations of petroleum compounds have historically been reported in samples from MW-9, MW-10, and MW-12. The concentrations in samples obtained by CATLIN from MW-12 and MW-12R appear to have decreased very slightly since the last sampling event conducted in March 2022 (CATLIN, 2022). Cleanup Levels Achieved Soil – Soil samples obtained in 2020 indicate that VOC concentrations are below Residential MSCCs, with the exception of benzo(a)pyrene, which was detected about the Residential MSCC in the SB-1 sample (H&H, 2020). Groundwater – Groundwater contaminant concentrations are above 2L GWQS and benzene is above GCL at the site. LNAPL – LNAPL has not been historically observed at the site. 7.0 CONCLUSIONS AND RECOMMENDATIONS Conclusions Groundwater monitoring findings for this period are summarized below: • Monitoring well MW-12R was reinstalled to 35 feet BLS; • Groundwater sample analytical results revealed multiple targeted analytes above their 2L GWQS in samples collected from monitoring well MW-12R. NCDEQ; 5665_Oxford Commons Shopping Center.doc CATLIN Engineers and Scientists CATLIN Project No. 221073 10 October 2023 • Benzene was detected above its GCL in the MW-12R sample. • Groundwater flow direction was not able to be calculated due to a lack of data points, but historical groundwater flow direction has been toward the north. Recommendations CATLIN recommends to: • Install a Provectus ORS sleeve into monitoring well MW-12R; and • Sample MW-12R approximately 4 months after installation. 8.0 LIMITATIONS The groundwater samples analyzed as part of this investigation only provide isolated data points and may not represent conditions at every location in the project area. Analyses and conclusions of this report, being based on interpolation between data points at the project area, may not be completely representative of all site conditions. Conclusions and recommendations of this investigation and report are based on the best available data in an effort to comply with current regulatory requirements. NCDEQ; 5665_Oxford Commons Shopping Center CATLIN Engineers and Scientists CATLIN Project No. 221073 11 October 2023 9.0 STATEMENTS AND CERTIFICATION 1 Enter the date the monitoring report was due. October 27, 2023 Will this report be submitted after the established due date? NO 2 Was any required information from the above template missing from this report? YES No cross sections are provided. Adequate subsurface information is not available. 3 If applicable, will any of the proposed attenuation milestones under the schedule approved in the Corrective Action Plan not be met? NA No CAP has been submitted for this site. 4 Does any known or suspected source zone soil contamination or free product remain outside of the assessed area that could be inhibiting natural attenuation? NO 5 Has there been an unexpected increase in contaminant mass sufficient to suggest a potential new release from a separate onsite or offsite source? NO 6 Certification: I, Sean J. O’Neil, a Licensed Engineer for CATLIN Engineers and Scientists, do certify that the information contained in this report is correct and accurate to the best of my knowledge. CATLIN Engineers and Scientists is licensed to practice engineering in North Carolina. The certification number of the company or corporation is C-0585. 10.0 REFERENCES CATLIN Engineers and Scientists, Monitoring Report, Oxford Commons Shopping Center, 3500 N. Roxboro Street, Durham, Durham County, North Carolina, NCDEQ Incident No. 5665, Risk Classification: L035E, May 13, 2022. CATLIN Engineers and Scientists, Letter Report, Oxford Commons Shopping Center, 3500 N. Roxboro Street, Durham, NC 27704, Incident Number: 5665, Risk Classification: L035E, CATLIN Project No. 221073, February 21, 2023. Hart & Hickman Smarter Environmental Solutions, Limited Site Assessment Report, Former Braggtown Amoco Property, 3404 North Roxboro Street, Durham, North Carolina, UST Incident No. 5665, H&H Job No. TDL-001, May 12, 2020. Horton, J. Wright, Jr. and Victor A. Zullo, An Introduction to the Geology of the Carolinas: The Geology of the Carolinas, pp 1-11. NCDEQ; 5665_Oxford Commons Shopping Center.doc CATLIN Engineers and Scientists CATLIN Project No. 221073 12 October 2023 NCDEQ, UST Section, North Carolina Department of Environmental Quality, Division of Waste Management, Corrective Action Guidelines, January 19, 2021. NCDENR, UST Section, North Carolina Department of Environment and Natural Resources, Division of Waste Management, Guidelines for Sampling, December 1, 2013. NCDEQ, UST Section, North Carolina Department of Environmental Quality, Division of Waste Management, Guidelines for Site Checks, Tank Closure, and Initial Response and Abatement, January 19, 2021. North Carolina Department of Natural Resources and Community Development, Geological Map of North Carolina, 1985. S&ME, Inc., Groundwater Monitoring Report, Oxford Commons Shopping Center, North Roxboro Road and Old Oxford Highway, Durham, Durham County, North Carolina, NCDENR Incident No. 5665, December 8, 2011. S&ME, Inc., Groundwater Monitoring, Site Reconnaissance, and Receptor Survey Report, Oxford Commons Shopping Center, Incident No. 5665, 3500 N. Roxboro Street, Durham, Durham County, NC, S&ME Project No. 4305-18-095, February 25, 2019. S&ME, Inc., Groundwater Monitoring Report, Oxford Commons Shopping Center TF-5665, 3500 N. Roxboro Street, Durham, Durham County, North Carolina, S&ME Project No. 4305-18-095B, November 6, 2019. U.S. EPA, Region 4, U.S. Environmental Protection Agency, Science and Ecosystem Support Division, Athens Georgia, Operating Procedure – Field Equipment Cleaning and Decontamination at the FEC, Striggow, B., U.S. EPA Report No. SESDPROC-206-R3, Effective Date December 18, 2015. U.S. Environmental Protection Agency, Science and Ecosystem Support Division, Athens Georgia, Operating Procedure – Groundwater Level and Well Depth Measurement, Striggow, B., U.S. EPA Report No. SESDPROC-105-R3, Effective Date November 3, 2016. U.S. EPA, Region 4, U.S. Environmental Protection Agency, Science and Ecosystem Support Division, Athens Georgia, Operating Procedure – Groundwater Sampling, Striggow, B., U.S. EPA Report No. SESDPROC-301-R4, Effective Date April 26, 2017. U.S. EPA, Region 4, U.S. Environmental Protection Agency, Science and Ecosystem Support Division, Athens Georgia, Operating Procedure – In Situ Water Quality Monitoring, Chief, Field Services Branch, U.S. EPA Report No. SESDPROC-111-R4, Effective Date March 14, 2018. Wilson Engineering Associates, Inc., Report of Subsurface Exploration and Site Characterization Study, Burger King Restaurant Site, Oxford Commons Shopping Center, Roxboro Road in Durham, North Carolina, February 12, 1991. NCDEQ; 5665_Oxford Commons Shopping Center.doc CATLIN Engineers and Scientists CATLIN Project No. 221073 October 2023 TABLES Page 1 of 1 TABLE 1 SITE HISTORY — UST AND AST SYSTEMS AND OTHER RELEASE INFORMATION Incident Name and No.: Oxford Commons Shopping Center - 5665 UST ID Number Dates of Ownership/ Operation Last Contents Previous Contents Capacity (gal) Construction Details Tank Dimensions Installation Date Date Removed (mm/dd/yy) A Heating Oil Heating Oil 1,000 Steel Unknown Unknown 01/xx/90 1*Gasoline Gasoline 10,000 Steel Unknown Unknown 05/13/91 2*Gasoline Gasoline 10,000 Steel Unknown Unknown 05/13/91 3 Gasoline Gasoline 400 Steel Unknown Unknown 05/13/91 AST ID Number Dates of Ownership/ Operation Last Contents Previous Contents Capacity (gal) Construction Details Tank Dimensions Installation Date Date Removed (mm/dd/yy) B Unknown Heating Oil Heating Oil 560 Steel Unknown Unknown 01/xx/90 Incident Number Material Released Date Release Discovered (mm/dd/yy) 5665 Gasoline 05/13/91 Information obtained from Hart & Hickman (2020) and S&ME (2019). * = Tank system was associated with the release. gal = gallons Name of Owner/ Operator 1939-1977 Description of the Release Soil contamination was observed during UST excavation on May 13, 1991. George Belvin (1939-1971); W.P. Belvin (1971-1974); Bob Brisby (1974-1975); Lonnie Hunter (1975-1977) Name of Owner/ Operator Unknown NCDEQ; 5665_Oxford Commons Shopping Center.xlsx; T1_Site History CATLIN Project No. 221073 CATLIN Engineers and Scientists October 2023 Page 1 of 1 TABLE 2 Incident Name and No.: Oxford Commons Shopping Center - 5665 Well ID Property Address Durham County PIN Number Owner Name (Last, First MI) Owner Mailing Address Well Use Distance/ Direction from Source Area (ft.) Comment Receptor ID Location Contact Distance/ Direction from Source Area (ft.) Pond North of Site —1,400 / NNE Water supply well information obtained from S&ME (2019). Surface water information from observations on Google Earth, image taken 3/9/21. ft. = feet Description Large retention pond No receptors were identified within 1,500 ft. PUBLIC AND PRIVATE WATER SUPPLY WELLS AND OTHER RECEPTOR INFORMATION NCDEQ; 5665_Oxford Commons Shopping Center.xlsx; T2_Receptor Info CATLIN Project No. 221073 CATLIN Engineers and Scientists October 2023 Page 1 of 1 TABLE 3 WELL CONSTRUCTION AND HISTORICAL WATER LEVEL GAUGING DATA Incident Name and No.: Oxford Commons Shopping Center - 5665 Well ID Date Installed (mm/dd/yy)* Date Water Level Measured (mm/dd/yy) Well Diameter (inches) Well Casing Depth (ft. BLS)* Screened Interval (x to y ft. BLS)* Bottom of Well (ft. BLS)* Top of Casing Elevation* (ft.) Free-Phase Product Thickness** Depth to Groundwater from Top of Casing (ft.) Groundwater Elevation (ft.)Comments MW-1 05/13/91 NM 2.0 4.0 4.0-19.0 19.0 NM Not requested MW-2 05/14/91 03/28/22 2.0 3.0 3.0-15.0 15.0 94.08 NMT 7.10 86.98 MW-3 05/14/91 NM 2.0 4.5 4.5-19.5 19.5 91.22 Not requested MW-4 05/14/91 03/28/22 2.0 4.0 4.0-19.0 19.0 95.15 NMT 10.71 84.44 MW-5 05/14/91 03/28/22 2.0 4.0 4.0-19.0 19.0 90.91 NMT 11.23 79.68 MW-6 06/29/93 NM 2.0 5.0 5.0-15.0 15.0 106.53 Not requested MW-7 06/29/93 NM 2.0 5.0 5.0-15.0 15.0 NM Not requested MW-8 06/29/93 NM 2.0 7.0 7.0-22.0 22.0 109.68 Not requested MW-9 07/30/94 03/28/22 2.0 19.5 19.5-34.5 34.5 106.36 NMT 20.67 85.69 MW-10 07/13/94 03/23/22 2.0 5.0 5.0-25.0 25.0 100.00 NMT 10.34 89.66 MW-10D 08/01/94 03/23/22 6.0 57.0 57.0-65.0 65.0 97.13 NMT 11.43 85.70 Deep well; Ɨ MW-11 08/01/94 NM 2.0 5.0 5.0-20.0 20.0 91.79 Not requested MW-12 08/01/94 03/28/22 2.0 19.5 19.5-34.5 34.5 111.57 NMT 20.51 91.06 MW-12R 09/21/23 09/26/23 2.0 20.0 20.0-35.0 35.0 106.85 NMT 26.09 80.76 NM = Not Measured NMT = No Measurable Thickness Ɨ = Water level was measured above the screened interval. ** = if free-phase product is present in a well, ground water elevation should be calculated by : [top of casing elevation - depth to water]+ [free product thickness x specific gravity of the fuel type] * = Data obtained from S&ME (2019). ft. BLS = feet Below Land Surface NM NM NM NM Destroyed NM NCDEQ; 5665_Oxford Commons Shopping Center.xlsx; T3_Well Construction & Gauging CATLIN Project No. 221073 CATLIN Engineers and Scientists October 2023 Page 1 of 1 TABLE 4 SUMMARY OF GROUNDWATER LABORATORY RESULTS — STANDARD METHOD 6200B Incident Name and No.: Oxford Commons Shopping Center - 5665 Date Collected (mm/dd/yy) 09/26/23 6,800 <3.9 11 J 6.2 J <3.5 7.0 J 420 50 3.8 J 250 120 690 360 110 823 BMDL 09/26/23 <0.18 0.57 <0.15 <0.13 1.7 <0.20 <0.22 <0.15 <0.13 <0.38 <0.12 <0.22 <0.20 <0.15 <0.73 BMDL 09/26/23 <0.18 <0.16 <0.15 <0.13 <0.14 <0.20 <0.22 <0.15 <0.13 <0.38 <0.12 <0.22 <0.20 <0.15 <0.73 BMDL All results in micrograms per liter (µg/L). BMDL = Below Method Detection Limit (refer to analytical report for a complete list of analytes and detection limits) EQ = Equipment GCL = Gross Contaminant Level 2L GWQS = NCAC T15A:02L Groundwater Quality Standards NE = Not Established Bold results indicate concentrations above 2L GWQS. Shaded results indicate concentrations above GCL. < = Less than method detection limit J = Detected but below the Reporting Limit (lowest calibration standard); result is an estimated concentration (CLP J-Flag). Well/ Sample ID MW-12R sec-ButylbenzeneContaminant of Concern BenzeneBromodichloromethane n-ButylbenzeneAll Other SM 6200B AnalytesChloroformDiisopropyl Ether (DIPE)EthylbenzeneIsopropylbenzene (Cumene)p-Isopropyltoluene(p-Cymene)Naphthalene n-PropylbenzeneToluene1,2,4-Trimethylbenzene1,3,5-TrimethylbenzeneTotal Xylenes70,000 70 EQ Blank / EB Trip Blank / TB GCL (µg/L) 2L GWQS (µg/L) 5,000 1 NE NE 5,900 70 8,800 70 70,000 70 28,500 400 24,100 400 50,000 500 Varies Varies 80,000 600 30,500 70 11,700 25 6,000 6 26,100 70 260,000 600 NCDEQ; 5665_Oxford Commons Shopping Center.xlsx; T4_GW Results CATLIN Project No. 221073 CATLIN Engineers and Scientists October 2023 Page 1 of 1 TABLE 5 SUMMARY OF HISTORICAL GROUNDWATER LABORATORY RESULTS — STANDARD METHOD 6200B Incident Name and No.: Oxford Commons Shopping Center - 5665 Date Collected 03/28/22 <2.0 <0.20 <1.6 <0.15 <0.11 <0.13 <0.13 <0.21 <0.11 <0.097 <0.24 <0.086 <0.22 <0.20 <0.11 <0.69 BMDL 03/28/22 <4.1 <0.40 <3.2 <0.30 <0.22 <0.26 <0.26 <0.43 <0.22 <0.19 <0.49 <0.17 <0.45 <0.40 <0.23 <1.38 BMDL 03/28/22 <2.0 <0.20 <1.6 <0.15 <0.11 <0.13 <0.13 <0.21 <0.11 <0.097 <0.24 <0.086 <0.22 <0.20 <0.11 <0.69 BMDL 03/28/22 48 J <0.20 <1.6 <0.15 <0.11 <0.13 <0.13 0.26 J 0.26 J <0.097 <0.24 0.39 J <0.22 <0.20 <0.11 <0.74 J*BMDL 03/23/22 <1,000 3,700 <810 <76 ƚ <55 <64 <64 1,600 75 J <49 ƚ <120 ƚ 260 78,000 2,400 780 8,600 BMDL 03/23/22 <2.0 4.5 <1.6 0.91 0.36 J 0.15 J 0.23 J 11 0.82 0.13 J 1.0 3.5 160 28 9.2 62 BMDL 03/28/22 260 J 7,000 280 J <15 <11 <13 <13 560 53 <9.7 260 130 820 390 100 1,158 BMDL 09/26/23 <50 6,800 <42 11 J 6.2 J <3.5 7.0 J 420 50 3.8 J 250 120 690 360 110 823 BMDL All results in micrograms per liter (µg/L). BMDL = Below Method Detection Limit (refer to analytical report for a complete list of analytes and detection limits) GCL = Gross Contaminant Level 2L GWQS = NCAC T15A:02L Groundwater Quality Standards Bold results indicate concentrations above 2L GWQS. Shaded results indicate concentrations above GCL. < = Less than method detection limit ƚ = The method detection limit is above the 2L GWQS. * = The value represents the sum of the reported practical quantitation limit of one analyte and the detected concentration of the other analyte. J = Detected but below the Reporting Limit (lowest calibration standard); result is an estimated concentration (CLP J-Flag).All Other SM 6200B Analytestert-Butylbenzene Diisopropyl Ether (DIPE)EthylbenzeneIsopropylbenzene (Cumene)p-Isopropyltoluene(p-Cymene)Naphthalene MW-2 MW-4 MW-5 MW-9 Total Xylenesn-PropylbenzeneToluene1,2,4-Trimethylbenzene1,3,5-TrimethylbenzeneContaminant of Concern AcetoneBenzene2-Butanone (MEK)n-Butylbenzenesec-ButylbenzeneWell/ Sample ID MW-10 80,000 600 MW-12 MW-12R GCL (µg/L) 2L GWQS (µg/L) 6,000,000 6,000 5,000 1 4,000,000 4,000 5,900 70 8,800 70 14,750 70 70,000 70 MW-10D 24,100 400 50,000 500 Varies Varies 30,500 70 11,700 25 6,000 6 26,100 70 260,000 600 28,500 400 NCDEQ; 5665_Oxford Commons Shopping Center.xlsx; T5_Historical GW CATLIN Project No. 221073 CATLIN Engineers and Scientists October 2023 NCDEQ; 5665_Oxford Commons Shopping Center.doc CATLIN Engineers and Scientists CATLIN Project No. 221073 October 2023 FIGURES FIGUREPROJECTTITLE 1SITE VICINITY MAP SITE LOCATION R O X B ORO S T OLD OXFORD STINTERSTATE 85 Copyright:© 2013 National Geographic Society, i-cubed 2,000 0 2,000 4,0001,000 Feet ³ OXFORD COMMONS SHOPPING CENTER3500 N ROXBORO STDURHAM, NC INCIDENT NO.JOB NO.DATE SCALE DRAWN BY/CHECKED BY5665221073OCT 2023 AS SHOWN KMC/SJO FIGUREPROJECTTITLE 2POTENTIAL RECEPTOR MAP SITE LOCATION ROXBORO ST O L D O X F O R D S T1 ,5 0 0 F EET RADIUS 500FE E T RADIUS POND Source: Esri, Maxar, Earthstar Geographics, and the GIS User Community 500 0 500 1,000250 Feet ³ OXFORD COMMONS SHOPPING CENTER3500 N ROXBORO STDURHAM, NC INCIDENT NO.JOB NO.DATE SCALE DRAWN BY/CHECKED BY5665221073OCT 2023 AS SHOWN KMC/SJO FIGUREPROJECTTITLE 3SITE MAP !? !? !?!?!? !? !?!? !> !> !> !> !> !> !> !? !> !? !(>!> !? !? !> !> !>!> !> !>!>!> !? !> !> !> !> !>!> !>!> !> !> !> !> ROXBORO ST O L D O X F O R D S T MW-6 MW-12MW-9 MW-1 MW-10*MW-10D* MW-2 MW-5 MW-7 MW-8 MW-4 MW-3 MW-11 APPROXIMATE LOCATION OF FORMER UST BASIN APPROXIMATE LOCATION OF FORMER DISPENSER ISLAND MW-12R** APPROXIMATE LOCATION OF FORMER 1,000-GAL.HEATING OIL UST Source: Esri, Maxar, Earthstar Geographics, and the GIS User Community 120 0 120 24060 Feet ³ OXFORD COMMONS SHOPPING CENTER3500 N ROXBORO STDURHAM, NC INCIDENT NO.JOB NO.DATE SCALE DRAWN BY/CHECKED BY5665221073OCT 2023 AS SHOWN KMC/SJO NOTES: 1. Well and tank locations were obtained from previous reportsprepared by other consultants and are approximate.2. The location of the former AST system is unknown.3. * = Well abandoned by CATLIN on 03/25/2022.4. ** = Well installed by CATLIN on 09/21/2023. Parcel Boundary Monitoring Well(Type II)!> Approximate Location of Former UST System Abandoned Monitoring Well (Deep)!(> LEGEND Destroyed Monitoring Well (Type II)!>Abandoned Monitoring Well (Type II)!> FIGUREPROJECTTITLE 4GROUNDWATER ELEVATION –SEPTEMBER 26, 2023 !> !> !> !> !> !> !> !> !> !> !>!> !> !>!>!> !> !> !> !> !> !>!> !> !> !> !> < < < < < < < < < < < < < < < < < < < ROXBORO ST O LD O X F O R D S T MW-6 MW-9 MW-2 MW-5 MW-8 MW-4 MW-3 MW-11 MW-12R(80.76) Source: Esri, Maxar, Earthstar Geographics, and the GIS User Community 120 0 120 24060 Feet ³ OXFORD COMMONS SHOPPING CENTER3500 N ROXBORO STDURHAM, NC INCIDENT NO.JOB NO.DATE SCALE DRAWN BY/CHECKED BY5665221073OCT 2023 AS SHOWN KMC/SJO Parcel Boundary Gauged Monitoring Well (Type II)!> Approximate Location of Former UST System LEGEND Groundwater Elevation (Feet) Historical GroundwaterFlow Direction <(##) Monitoring Well(Type II)!> NOTES:1. Well and tank locations were obtained from previous reportsprepared by other consultants and are approximate.2. The location of the former AST system is unknown. FIGUREPROJECTTITLE 5 MONITORING WELLGROUNDWATER SAMPLEANALYTICAL RESULTS –SEPTEMBER 26, 2023 !> !> !> !> !> !> !> !> !> !> !>!> !> !>!>!> !> !> !> !> !> !>!> !> !> !> !> ROXBORO ST O L D O X F O R D S TMW-6 MW-9 MW-2 MW-5 MW-8 MW-4 MW-3 MW-11 MW-12R Source: Esri, Maxar, Earthstar Geographics, and the GIS User Community 120 0 120 24060 Feet ³ OXFORD COMMONS SHOPPING CENTER3500 N ROXBORO STDURHAM, NC INCIDENT NO.JOB NO.DATE SCALE DRAWN BY/CHECKED BY5665221073OCT 2023 AS SHOWN KMC/SJO Parcel Boundary Sampled Monitoring Well (Type II)!> Approximate Location of Former UST System LEGEND Monitoring Well(Type II)!> NOTES:1. Well and tank locations were obtained from previous reportsprepared by other consultants and are approximate.2. The location of the former AST system is unknown. Incident Name and No.: Oxford Commons Shopping Center - 5665 DateCollected 09/26/23 6,800 250 120 690 823 All results in micrograms per liter (µg/L).Bold results are above 2L GWQS. Refer to Table 4 for all results and notes. Shaded results are above GCL.Total Xylenes50,0005005,0001BenzeneSUMMARY OF GROUNDWATER LABORATORY RESULTS - STANDARD METHOD 6200B GCL (µg/L)2L GWQS (µg/L) 6,0006 260,000600Naphthalene n-PropylbenzeneTolueneContaminant of Concern MW-12R Well/ SampleID 26,10070 NCDEQ; 5665_Oxford Commons Shopping Center.doc CATLIN Engineers and Scientists CATLIN Project No. 221073 October 2023 APPENDICES NCDEQ; 5665_Oxford Commons Shopping Center.doc CATLIN Engineers and Scientists CATLIN Project No. 221073 October 2023 APPENDIX A HISTORICAL DATA SVOCs by EPA Method 6100 PB by EPA Method 3030C or 200.7 Well ID Date Collected Acetonep-Isopropyltoluene5/15/1991 BDL 9,200 2,400 NA NA NA NA NA NA BDL NA NA 4,100 NA NA NA 11,000 NA NA NA 10/4/2011 5/1/2018 7/1/2019 5/15/1991 BDL 500 BDL NA NA NA NA NA NA BDL NA BDL NA BDL NA NA BDL BDL NA NA 7/1/1993 BDL BDL BDL NA NA BDL NA NA NA BDL NA BDL NA BDL NA NA BDL NA 200 NA 9/18/1994 BDL BDL BDL NA NA BDL NA NA NA BDL BDL BDL NA BDL BDL BDL BDL NA NA BDL 10/4/2011 BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL NA NA 5/1/2018 BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL NA NA 7/1/2019 9.9 J BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL NA NA 5/15/1991 BDL BDL BDL NA NA NA NA NA NA BDL NA BDL NA BDL NA NA BDL NA NA NA 7/1/1993 BDL 8.0 42.0 NA NA 11 NA NA NA BDL NA 1.0 NA 6.0 NA NA 26 NA NA NA 9/18/1994 BDL BDL BDL NA NA BDL NA NA NA BDL BDL BDL NA BDL BDL BDL 3.3 NA NA BDL 10/4/2011 BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL NA NA 5/1/2018 BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL NA NA 7/1/2019 7.5 J BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL NA NA 5/15/1991 BDL 24 247 NA NA NA NA NA NA BDL NA 38 NA BDL NA NA 850 14 NA NA 7/1/1993 BDL BDL 12 NA NA BDL NA NA NA BDL NA BDL NA BDL NA NA 25 NA NA NA 9/18/1994 BDL 6.67 BDL NA NA BDL NA NA NA BDL BDL BDL NA BDL BDL BDL 3.3 NA NA 11 10/4/2011 BDL 3.6 3.9 2.8 BDL BDL BDL 4.2 1.5 BDL 1.6 BDL BDL BDL BDL BDL BDL BDL NA NA 5/1/2018 BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL NA NA 7/1/2019 6.2 J BDL 0.14 J BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL NA NA 5/15/1991 BDL BDL BDL NA NA NA NA NA NA BDL NA BDL NA BDL NA NA BDL BDL NA NA 7/1/1993 BDL BDL BDL NA NA BDL NA NA NA BDL NA BDL NA BDL NA NA BDL NA NA NA 9/18/1994 BDL BDL BDL NA NA BDL NA NA NA BDL BDL BDL NA BDL BDL BDL 3.3 NA NA BDL 10/4/2011 BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL NA NA 5/1/2018 BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL NA NA 7/1/2019 BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL NA NA 7/1/1993 10/4/2011 5/1/2018 7/1/2019 7/1/1993 BDL BDL BDL NA NA BDL NA NA NA BDL NA BDL NA BDL NA NA BDL NA NA NA 10/4/2011 7/1/1993 BDL BDL BDL NA NA BDL NA NA NA BDL NA BDL NA BDL NA NA BDL NA NA NA 9/18/1994 BDL BDL BDL NA NA BDL NA NA NA BDL BDL BDL NA BDL BDL BDL BDL NA NA BDL 10/4/2011 BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL NA NA 5/1/2018 BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL NA NA 7/1/2019 BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL NA NA 9/18/1994 BDL 294 133.0 NA NA 48.1 NA NA NA BDL BDL BDL NA 147 BDL BDL 108 NA NA NA 10/4/2011 BDL 12 9.0 4.3 BDL 5.3 0.83 5.3 1.2 BDL BDL BDL BDL 31 27 6.8 76 BDL NA NA 5/1/2018 BDL 0.12 J 3.4 0.44 BDL 0.88 J 0.28 J 1.3 0.15 J BDL BDL BDL BDL 0.47 J 6.7 1.7 8.7 BDL NA NA 7/1/2019 8.8 J 13 91 8.2 BDL 37 3.6 25 1.4 0.64 BDL BDL BDL 4.3 140 24 156 BDL NA NA 9/18/1994 BDL 2,580 12,700 NA NA 95 NA NA NA BDL BDL BDL NA 823 BDL BDL 2,230 NA NA 15 10/4/2011 BDL 4,300 310 56 86 200 BDL 130 BDL BDL 42 BDL BDL 6,900 470 92 1,100 BDL NA NA 5/1/2018* BDL 5,400 410 81 BDL 340 J 19 J 230 13 J BDL 26 J BDL BDL 8,800 530 110 1,400 BDL NA NA 7/1/2019* BDL 3,100 400 40 BDL 190 21 120 7.4 J BDL 14 BDL BDL 15,000 610 170 2,050 BDL NA NA 10/11/2019 * BDL 4,600 650 66 BDL 470 J BDL 190 BDL BDL 22 J BDL BDL 9,500 720 240 2,860 BDL NA NA 9/18/1994 BDL BDL BDL NA NA BDL NA NA NA BDL BDL BDL NA BDL BDL BDL BDL NA NA 71 10/4/2011 BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL 4.5 BDL BDL BDL BDL BDL BDL BDL NA NA 5/1/2018 BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL 0.42 J BDL BDL BDL BDL BDL BDL BDL NA NA 7/1/2019 4.4 J BDL BDL BDL BDL BDL BDL BDL BDL BDL 0.76 BDL BDL BDL BDL BDL BDL BDL NA NA 9/18/1994 BDL BDL BDL NA NA BDL NA NA NA BDL BDL BDL NA BDL BDL BDL BDL NA NA 13 10/4/2011 BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL 0.84 BDL BDL BDL BDL NA NA 5/1/2018 BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL NA NA 7/1/2019 5.9 J BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL NA NA 9/18/1994 BDL 1,620 377 NA NA 59.5 NA NA NA BDL 284 769 NA 121 448 223 1,350 NA NA 24 10/4/2011 BDL 11,000 730 65 BDL 360 BDL 130 BDL BDL 130 BDL BDL 440 670 150 1,500 BDL NA NA 5/1/2018* BDL 5,100 570 42 J BDL 210 J BDL 91 BDL BDL BDL BDL BDL 390 970 240 1,453 BDL NA NA 7/1/2019* BDL 4,800 720 55 BDL 380 21 140 6.0 7.0 20 BDL BDL 430 830 210 1,355 BDL NA NA 10/11/2019 * BDL 5,500 760 59 BDL 330 13 J 140 9.0 J BDL 18 J BDL BDL 560 790 240 1,370 BDL NA NA 6,000 1 600 70 100 6 70 70 70 25 70 20 5 600 400 400 500 0.02 200 15 6,000,000 5,000 84,500 25,000 100,000 6,000 6,900 30,000 8,500 11,700 70,000 20,000 5,000 260,000 28,500 25,000 85,500 50 200 15,000 Notes: Analytes that are not shown for the method were not detected. Concentrations are reported in micrograms per liter (µg/L). September 18, 1994 groundwater analytical data contained within Environmental Investigations, P.A. Comprehensive Site Assessment Report dated March, 1995 * Indicates sample was run at a dilution. 2L Standard: North Carolina Groundwater Quality Standards: 15A NCAC 2L.0202 Concentrations exceeding the 2L Standards are shown in Shaded and BOLD fields. Concentrations exceeding the laboratory's reporting limits are shown in BOLD fields. Concentrations exceeding the Gross Contamination Levels are shown in Underlined, Shaded, and BOLD fields. NA: Not Analyzed J: Detected but below the Reporting Limit (lowest calibration standard); result is an estimated concentration. MW-12 MW-10 Monitor Well Destroyed Monitor Well Not Located Monitor Well Not Located Monitor Well Dry - Not Sampled Monitor Well Dry - Not Sampled MW-8 MW-7 MW-6 MW-11 MW-10D MW-9 Analytical Method → TABLE 4 S&ME Project No. 4305-18-095B 3500 N. Roxboro Street, Durham, Durham County, North Carolina Oxford Commons Shopping Center (Incident No. TF-5665, UST No. RA-834) SUMMARY OF GROUNDWATER SAMPLING RESULTS Volatile Organic Compounds (VOCs) by EPA Method 6200B (µg/L)TolueneTotal XylenesMW-5 MW-4 MW-3 MW-2 MW-1 Methyl Isobutyl KetoneBenzenesec-Butlybenzenen-Butylbenzenen-PropylbenzeneMonitor Well Not Located 2L Standard Gross Contamination Level methylene chlorideMonitor Well Dry - Not Sampled Benzo(g,h,i) PeryleneLeadContaminant of Concern →Isopropylbenzene Methyl-tert-butyl ether1,2,4-Trimethylbenzene1,2-Dibromoethane (EDB)1,3,5-TrimethylbenzeneEthylbenzeneMonitor Well Dry - Not Sampleddiisopropyl ether (IPE)NaphthaleneAPPENDIX A HISTORICAL DATA- S&ME (2019) NCDEQ; 5665_Oxford Commons Shopping Center CATLIN Project No. 221073 CATLIN Engineers and Scientists October 2023 NCDEQ; 5665_Oxford Commons Shopping Center.doc CATLIN Engineers and Scientists CATLIN Project No. 221073 October 2023 APPENDIX B SITE PHOTOGRAPHS APPENDIX B SITE PHOTOGRAPHS – SEPTEMBER 21, 2023 NCDEQ; 5665_Oxford Commons Shopping Center CATLIN Engineers and Scientists CATLIN Project No. 221073 October 2023 View of installation of MW-12R, facing northwest. View of completed MW-12R, facing southeast. APPENDIX B SITE PHOTOGRAPHS – SEPTEMBER 26, 2023 NCDEQ; 5665_Oxford Commons Shopping Center CATLIN Engineers and Scientists CATLIN Project No. 221073 October 2023 View of the Oxford Commons Site, facing north (MW-12R in the foreground). View of MW-12R. NCDEQ; 5665_Oxford Commons Shopping Center.doc CATLIN Engineers and Scientists CATLIN Project No. 221073 October 2023 APPENDIX C DAILY ACTIVITIES LOGS, FINAL TOC SURVEY, AND FIELD DATA SHEET Page 1 of 1 CLIENT'S CATLIN NAME:PROJECT: CATLIN PROJECT #:PHASE: INSTRUMENT #: ELEVATION (TBM):DATE:9/21/2023 ROD #:UNITS (FT./M): FEET TOP BOTTOM4.444.174.383.264.444.17 FIELD NOTES BY:DATE:9/21/2023 INSTRUMENT BY: NOTES REDUCED BY:DATE:10/11/2023 ROD PERSON: HI - (-) = ELEV.* A sketch must be provided with the level notes. T PARK G HILL 0.00 (+) = MID at TBM or BM (TOP - BOTTOM) * 100 = DISTANCE TBM + (+) = HI (TOP + BOTTOM)/2 = MID (-) 110.67 0.00 30 0 110.67 29 0 28 0 110.67 0.00 0.00 27 0 110.67 0.00 110.67 0.00 26 0 110.67 25 0 24 0 110.67 0.00 0.00 23 0 110.67 0.00 110.67 0.00 22 0 110.67 21 0 20 0 110.67 0.00 0.00 19 0 110.67 0.00 110.67 0.00 18 0 110.67 17 0 16 0 110.67 0.00 0.00 15 0 110.67 0.00 110.67 0.00 14 0 110.67 13 0 12 0 110.67 0.00 0.00 11 0 110.67 0.00 110.67 0.00 10 0 110.67 9 0 8 0 110.67 0.00 0.00 7 0 110.67 0.00 110.67 0.00 6 0 110.67 5 0 MW-9 4 0 110.67 0.00 3.82 MW-12R 3 0 27 4.31 106.36 4.31 106.36 4.31 MW-9 2 243 112 3.82 106.85 HI ELEV. (feet)CHECK (T+B)/2 NOTES 1 0 27 4.31 110.67 106.36 POINT ANGLE (degrees) DISTANCE (feet)MID (-)(+) REDUCED LEVEL NOTES NCDEQ - SLP Oxford Commons Shopping Center 221073 BENCH MARK DESC.:MW-09 CATLIN PROJECT:SAMPLED BY: CATLIN PROJECT # :DATE SAMPLED: CLIENT'S NAME: MW-12R 8.91 26.09 1.454 NMT 4.362 35 7.271 2 Method:Bailer Purge Start Time:11:20 Required Bails for 3 Well Volumes:19 Purge Stop Time:12:25 Required Bails for 5 Well Volumes:31 Was Well Purged Dry?Yes Number of Bails Removed:42 Sample Time:15:16 Groundwater Removed (gal):10.1 Equipment Used: Time pH (Standard Units) ORP (mV) Specific Cond. (µS/cm) Dissolved Oxygen (mg/L) Temperature (Co) Laboratory:Con-Test Analysis: Depth to Water (ft below TOC)One Well Volume (gal) GROUNDWATER SAMPLING FORM Oxford Commons Shopping Cntr Sandy Miller 221073.01 9/26/2023 NCDEQ - SLP, L. Blalock Monitoring Well Information Well Data Volume of Groundwater in Well Well ID Water Column (ft below TOC) 6200B Depth to Product (ft below TOC)Three Well Volumes (gal) Total Well Depth (ft)Five Well Volumes (gal) Well Diameter (inches) Purging Information Information Geochemical Parameters Aqua Troll 600 Turbidity and Additional Sampling Notes Well was not developed at the time of installation. Five well volumes (42 bails) were removed and well went dry twice. Extremely slow recharge. Upon return, the well was sampled without further purging. No VuSitu data available. Water highly turbid, gray, silty with mild HCO. Cleared up slightly and then settled out prior to sampling. Laboratory Analysis Information NCDEQ; 5665_Oxford Commons Shopping Center.doc CATLIN Engineers and Scientists CATLIN Project No. 221073 October 2023 APPENDIX D WELL LOG AND WELL CONSTRUCTION RECORD 07/14/23 H.S. AUGERS 3323A 29.19 MW-12R 36.035065 T. Jason White -78.892238 DURHAM 1 X 10/24/2023 8.25 Surface Pour CATLIN Engineers and Scientists X 2 Slot .010 3500 N. Roxboro st, Durham, NC Bent. Pellets18 20 Concrete N/A 18 35 Surface Pour#2 Medium Sand 35.0 X 16 16 0.5 20 35 PVC 20 Sch. 40 Surface Pour 0 Sch. 40 PVC If this is a repair, fill out known well construction information and explain the nature ofthe repair under #21 remarks section or on the back of this form. 12. Well construction method: (i.e. auger, rotary, cable, direct push, etc.) 13a. Yield (gpm) FOR WATER SUPPLY WELLS ONLY: Method of test: Amount: For Internal Use ONLY: 14. WATER ZONES FROM Facility ID# (if applicable) Physical Address, City, and Zip County Parcel Identification No. (PIN) (if well field, one lat/long is sufficient) N 6. Is (are) the well(s): Yes TemporaryPermanent or or No7. Is this a repair to an existing well: 8. Number of wells constructed: For multiple injection or non-water supply wells ONLY with the same construction, youcan submit one form. 9. Total well depth below land surface: For multiple wells list all depths in different (example- 3@200' and 2@100') W (ft.)10. Static water level below top of casing: If water level is above casing, use "+" 11. Borehole diameter: MATERIAL FROM Residential Water Supply (shared) Adapted from Form GW-1 ft. ft. ft. ft. ft.ft. ft. ft. ft. ft. ft. ft. (ft.) (in.) ft. ft.ft. ft. ft. ft. in. in. ft. ft. ft. ft. ft. ft. 13b. Disinfection type: 22. Certification: Revised 2-22-2016 ft.NCDEQ - Oxford Commons TO DIAMETER THICKNESS MATERIAL FROM17. SCREEN DIAMETER SLOT SIZE MATERIALTHICKNESS FROM TO MATERIAL ft. ft. ft. ft. FROM TO 18. GROUT MATERIAL 19. SAND/GRAVEL PACK (if applicable) 1. Well Contractor Information: This form can be used for single or multiple wells Well Contractor Name TO DESCRIPTION FROM TO 24c. For Water Sypply & Injection Wells:Also submit one copy of this form within 30 days of completion of wellconstruction to the county health department of the county where constructed. DIAMETER THICKNESS FROM TO DESCRIPTION (color, hardness, soil/rock type, grain size, etc.) 21. REMARKS 20. DRILLING LOG (attach additional sheets if necessary) 5b. Latitude and Longitude in degrees/minutes/seconds or decimal degrees: Signature of Certified Well Contractor Date 24a. For All Wells: Submit this form within 30 days of completion of wellconstruction to the following: SUBMITTAL INSTRUCTIONS Division of Water Resources, Information Processing Unit,1617 Mail Service Center, Raleigh, NC 27699-1617 Division of Water Resources, Underground Injection Control Program,1636 Mail Service Center, Raleigh, NC 27699-1636 16. OUTER CASING (for multi-cased wells) OR LINER (if applicable) North Carolina Department of Environment and Natural Resources - Division of Water Resources 24b. For Injection Wells ONLY: In addition to sending the form to theaddress in 24a above, also submit a copy of this form within 30 days ofcompletion of well construction to the following: WELL CONSTRUCTION RECORD 23. Site diagram or additional well details: Aquifer Recharge Groundwater Remediation Stormwater Drainage Aquifer Storage and Recovery Aquifer Test Experimental Technology Geothermal (Closed Loop)Tracer Other (explain under #21 Remarks) 4. Date Well(s) Completed: 5a. Well Location: Well ID#: Facility/Owner Name NC Well Contractor Certification Number Company Name 2. Well Construction Permit #:List all applicable well permits (i.e. County, State, Variance, Injection, etc.) 3. Well Use (check well use): Water Supply Well: Agricultural Non-Water Supply Well: Monitoring Geothermal (Heating/Cooling Supply) Industrial/Commercial Irrigation 15. INNER CASING OR TUBING (geothermal closed-loop) Municipal/Public Residential Water Supply (single) ft. ft. ft. ft. ft. ft. ft. ft. ft. TO EMPLACEMENT METHOD & AMOUNT in. in. in. EMPLACEMENT METHOD Recovery Injection Well: You may use the back of this page to provide additional well site details or well construction details. You may also attach additional pages if necessary. By signing this form, I hereby certify that the well(s) was (were) constructed in accordance with15A NCAC 02C .0100 or 15A NCAC 02C .0200 Well Construction Standards and that a copy of this record has been provided to the well owner. Geothermal (Heating/Cooling Return) Salinity Barrier Subsidence Control SEE ATTAC H E D 35.0 0.0 5.0 10.0 15.0 20.0 25.0 30.0 B B B B B B B G G G G G G G A A A A A A A R R R R R R R 35.0 0.0 35.0 20.0 16.0 18.0 35.020" Sch. 40 PVC2" Slot .010Sch. 40 PVC6.0 17.0 35.0 6.0 17.0 (ML) - Orange tan, Sandy SILT w/tr. clay. Dry No HCO (ML) - Gray, SILT w/low elasticity. Dry. Slight HCO (MH) - Dark gray, SILT w/high elasticity. Moist. High HCO BORING TERMINATED AT DEPTH 35.0 ft DEPTH 1 35.0 35.0 0 HOUR DTW: 24 HOUR DTW:END DATE:07/14/23 METHOD:H.S. AUGERS COUNTY:DURHAM T.O.C. ELEV.: TOTAL DEPTH: WELL DEPTH: NC SHEET N/A 29.2 OF1 BLOW COUNT 0.5ft START DATE:07/14/23 0.5ft WELL ID: STATE: MW-12RNORTHING: LOGGED BY: DRILLER: CREW: 0.5ft0.5ft EASTING: PROJECT NO.:221073.01 SYSTEM: NCDEQ Oxford CommonsPROJECT:T. Park T. Jason White S. Pugh LOCATION:Durham VERT. DATUM: DRILL MACHINE:CAT1314 CME-45B 86.7% 04/05/2023 ENVIRONMENTAL, CIVILGEOTECHNICAL Wilmington, Raleigh, Washington,Charleston CATLIN BORING LOG 221073.01 NCDEQSLP OXFORD COMMONS GINT.GPJ CATLIN.GDT 10/19/23Portland Cement Bentonite Pellets #2 Medium Sand 0.0 WELL LOG WELL DETAIL SOIL AND ROCK DESCRIPTIONLAB.DEPTH MOIS 0.0 LOG Land Surface OVA (ppm) Wilmington, NC221073.01 NCDEQ; 5665_Oxford Commons Shopping Center.doc CATLIN Engineers and Scientists CATLIN Project No. 221073 October 2023 APPENDIX E LABORATORY ANALYTICAL REPORT AND CHAIN OF CUSTODY DOCUMENT 39 Spruce Street * East Longmeadow, MA 01028 * FAX 413/525-6405 * TEL. 413/525-2332 October 10, 2023 Sean O’Neil CATLIN Engineers & Scientists 1044 Washington Street Raleigh, NC 27605 Project Location: Durham, NC Client Job Number: Project Number: 221073.01 Laboratory Work Order Number: 23I3819 Enclosed are results of analyses for samples as received by the laboratory on September 28, 2023. If you have any questions concerning this report, please feel free to contact me. Sincerely, Kaitlyn A. Feliciano Project Manager Table of Contents Sample Summary 3 Hits Only Report 4 Case Narrative 6 Sample Results 7 23I3819-01 7 23I3819-02 9 23I3819-03 11 Sample Preparation Information 13 QC Data 14 Volatile Organic Compounds by GC/MS 14 B353599 14 Flag/Qualifier Summary 18 Certifications 19 Chain of Custody/Sample Receipt 21 39 Spruce Street * East Longmeadow, MA 01028 * FAX 413/525-6405 * TEL. 413/525-2332 ANALYTICAL SUMMARY 10/10/2023 CATLIN Engineers & Scientists 1044 Washington Street Raleigh, NC 27605 ATTN: Sean O’Neil 221073.01 23I3819 The results of analyses performed on the following samples submitted to the CON-TEST Analytical Laboratory are found in this report. PROJECT LOCATION: PURCHASE ORDER NUMBER: PROJECT NUMBER: REPORT DATE: WORK ORDER NUMBER: FIELD SAMPLE #LAB ID:MATRIX TESTSAMPLE DESCRIPTION SUB LAB Durham, NC 230926-3 MW-12R 23I3819-01 Ground Water SM21-23 6200B EB 23I3819-02 Equipment Blank Water SM21-23 6200B TB 23I3819-03 Trip Blank Water SM21-23 6200B [TOC_1]Sample Summary[TOC] 39 Spruce Street * East Longmeadow, MA 01028 * FAX 413/525-6405 * TEL. 413/525-2332 [TOC_1]Hits Only Report[TOC]EXECUTIVE SUMMARY Client ID:Lab ID:23I3819-03TB No Results Detected Con-Test does not accept liability for the consequences of any actions taken solely on the basis of the information provided in the Executive Summary section of this report. Users must review this report in its entirety to determine data usability and assessment. 39 Spruce Street * East Longmeadow, MA 01028 * FAX 413/525-6405 * TEL. 413/525-2332 EXECUTIVE SUMMARY Client ID:Lab ID: Analyte Results/Qual RL Units Method 23I3819-01MW-12R DL 1,2,4-Trimethylbenzene 360 12 g/L SM21-23 6200B5.0 1,3,5-Trimethylbenzene 110 12 g/L SM21-23 6200B3.7 Benzene 6800 250 g/L SM21-23 6200B92 Diisopropyl Ether (DIPE)7.0 12 g/L SM21-23 6200BJ5.0 Ethylbenzene 420 12 g/L SM21-23 6200B5.5 Isopropylbenzene (Cumene)50 12 g/L SM21-23 6200B3.8 m+p Xylene 750 25 g/L SM21-23 6200B12 Naphthalene 250 12 g/L SM21-23 6200B9.5 n-Butylbenzene 11 12 g/L SM21-23 6200BJ3.7 n-Propylbenzene 120 12 g/L SM21-23 6200B3.1 o-Xylene 73 12 g/L SM21-23 6200B6.1 p-Isopropyltoluene (p-Cymene)3.8 12 g/L SM21-23 6200BJ3.2 sec-Butylbenzene 6.2 12 g/L SM21-23 6200BJ3.2 Toluene 690 12 g/L SM21-23 6200B5.6 Client ID:Lab ID: Analyte Results/Qual RL Units Method 23I3819-02EB DL Bromodichloromethane 0.57 0.50 g/L SM21-23 6200B0.16 Chloroform 1.7 0.50 g/L SM21-23 6200B0.14 Con-Test does not accept liability for the consequences of any actions taken solely on the basis of the information provided in the Executive Summary section of this report. Users must review this report in its entirety to determine data usability and assessment. 39 Spruce Street * East Longmeadow, MA 01028 * FAX 413/525-6405 * TEL. 413/525-2332 CASE NARRATIVE SUMMARY All reported results are within defined laboratory quality control objectives unless listed below or otherwise qualified in this report. For method 6200B elevated reporting limits for sample 23I3819-01 due to high concentrations of target compounds. [TOC_1]Case Narrative[TOC] SM21-23 6200B Qualifications: Elevated reporting limit due to high concentration of target compounds. Analyte & Samples(s) Qualified: RL-11 23I3819-01[MW-12R] The results of analyses reported only relate to samples submitted to the Con-Test Analytical Laboratory for testing. I certify that the analyses listed above, unless specifically listed as subcontracted, if any, were performed under my direction according to the approved methodologies listed in this document, and that based upon my inquiry of those individuals immediately responsible for obtaining the information, the material contained in this report is, to the best of my knowledge and belief, accurate and complete. Lisa A. Worthington Technical Representative 39 Spruce Street * East Longmeadow, MA 01028 * FAX 413/525-6405 * TEL. 413/525-2332 Date Received: 9/28/2023 Work Order: 23I3819Sample Description:Project Location: Durham, NC Sample ID: 23I3819-01 Field Sample #: MW-12R Sample Matrix: Ground Water Sampled: 9/26/2023 15:16 [TOC_2]23I3819-01[TOC] AnalystAnalyzedDilutionFlag/QualRLResultsAnalyte Date/Time DL Units Date PreparedMethod Sample Flags: RL-11 Volatile Organic Compounds by GC/MS ND 1200 10/3/23 5:10 EEHg/L50 10/2/23SM21-23 6200B25Acetone 6800 250 10/3/23 6:50 EEHg/L92 10/2/23SM21-23 6200B500Benzene ND 12 10/3/23 5:10 EEHg/L3.7 10/2/23SM21-23 6200B25Bromobenzene ND 12 10/3/23 5:10 EEHg/L7.1 10/2/23SM21-23 6200B25Bromochloromethane ND 12 10/3/23 5:10 EEHg/L3.9 10/2/23SM21-23 6200B25Bromodichloromethane ND 12 10/3/23 5:10 EEHg/L10 10/2/23SM21-23 6200B25Bromoform ND 50 10/3/23 5:10 EEHg/L33 10/2/23SM21-23 6200B25Bromomethane ND 120 10/3/23 5:10 EEHg/L42 10/2/23SM21-23 6200B252-Butanone (MEK) 11 12 10/3/23 5:10 EEHg/L3.7 10/2/23SM21-23 6200B25Jn-Butylbenzene 6.2 12 10/3/23 5:10 EEHg/L3.2 10/2/23SM21-23 6200B25Jsec-Butylbenzene ND 12 10/3/23 5:10 EEHg/L3.5 10/2/23SM21-23 6200B25tert-Butylbenzene ND 25 10/3/23 5:10 EEHg/L4.1 10/2/23SM21-23 6200B25Carbon Tetrachloride ND 12 10/3/23 5:10 EEHg/L3.0 10/2/23SM21-23 6200B25Chlorobenzene ND 1200 10/3/23 5:10 EEHg/L510 10/2/23SM21-23 6200B25Ethanol ND 12 10/3/23 5:10 EEHg/L5.0 10/2/23SM21-23 6200B25Chlorodibromomethane ND 12 10/3/23 5:10 EEHg/L8.6 10/2/23SM21-23 6200B25Chloroethane ND 12 10/3/23 5:10 EEHg/L3.5 10/2/23SM21-23 6200B25Chloroform ND 15 10/3/23 5:10 EEHg/L13 10/2/23SM21-23 6200B25Chloromethane ND 12 10/3/23 5:10 EEHg/L3.9 10/2/23SM21-23 6200B252-Chlorotoluene ND 12 10/3/23 5:10 EEHg/L3.8 10/2/23SM21-23 6200B254-Chlorotoluene ND 12 10/3/23 5:10 EEHg/L4.0 10/2/23SM21-23 6200B251,2-Dibromoethane (EDB) ND 12 10/3/23 5:10 EEHg/L3.2 10/2/23SM21-23 6200B251,2-Dichlorobenzene ND 12 10/3/23 5:10 EEHg/L3.4 10/2/23SM21-23 6200B251,3-Dichlorobenzene ND 12 10/3/23 5:10 EEHg/L3.2 10/2/23SM21-23 6200B251,4-Dichlorobenzene ND 12 10/3/23 5:10 EEHg/L4.0 10/2/23SM21-23 6200B25Dichlorodifluoromethane (Freon 12) ND 12 10/3/23 5:10 EEHg/L3.4 10/2/23SM21-23 6200B251,1-Dichloroethane ND 25 10/3/23 5:10 EEHg/L7.6 10/2/23SM21-23 6200B251,2-Dichloroethane ND 12 10/3/23 5:10 EEHg/L3.5 10/2/23SM21-23 6200B251,1-Dichloroethylene ND 12 10/3/23 5:10 EEHg/L3.5 10/2/23SM21-23 6200B25cis-1,2-Dichloroethylene ND 12 10/3/23 5:10 EEHg/L4.3 10/2/23SM21-23 6200B25trans-1,2-Dichloroethylene ND 12 10/3/23 5:10 EEHg/L4.8 10/2/23SM21-23 6200B251,2-Dichloropropane ND 12 10/3/23 5:10 EEHg/L2.9 10/2/23SM21-23 6200B251,3-Dichloropropane ND 12 10/3/23 5:10 EEHg/L8.7 10/2/23SM21-23 6200B252,2-Dichloropropane ND 12 10/3/23 5:10 EEHg/L3.7 10/2/23SM21-23 6200B251,1-Dichloropropene ND 12 10/3/23 5:10 EEHg/L4.1 10/2/23SM21-23 6200B25cis-1,3-Dichloropropene ND 12 10/3/23 5:10 EEHg/L3.5 10/2/23SM21-23 6200B25trans-1,3-Dichloropropene 7.0 12 10/3/23 5:10 EEHg/L5.0 10/2/23SM21-23 6200B25JDiisopropyl Ether (DIPE) 420 12 10/3/23 5:10 EEHg/L5.5 10/2/23SM21-23 6200B25Ethylbenzene ND 120 10/3/23 5:10 EEHg/L30 10/2/23SM21-23 6200B252-Hexanone (MBK) 50 12 10/3/23 5:10 EEHg/L3.8 10/2/23SM21-23 6200B25Isopropylbenzene (Cumene) 3.8 12 10/3/23 5:10 EEHg/L3.2 10/2/23SM21-23 6200B25Jp-Isopropyltoluene (p-Cymene) ND 12 10/3/23 5:10 EEHg/L4.3 10/2/23SM21-23 6200B25Methyl tert-Butyl Ether (MTBE) ND 120 10/3/23 5:10 EEHg/L4.4 10/2/23SM21-23 6200B25Methylene Chloride ND 120 10/3/23 5:10 EEHg/L33 10/2/23SM21-23 6200B254-Methyl-2-pentanone (MIBK) [TOC_1]Sample Results[TOC] 39 Spruce Street * East Longmeadow, MA 01028 * FAX 413/525-6405 * TEL. 413/525-2332 Date Received: 9/28/2023 Work Order: 23I3819Sample Description:Project Location: Durham, NC Sample ID: 23I3819-01 Field Sample #: MW-12R Sample Matrix: Ground Water Sampled: 9/26/2023 15:16 AnalystAnalyzedDilutionFlag/QualRLResultsAnalyte Date/Time DL Units Date PreparedMethod Sample Flags: RL-11 Volatile Organic Compounds by GC/MS 250 12 10/3/23 5:10 EEHg/L9.5 10/2/23SM21-23 6200B25Naphthalene 120 12 10/3/23 5:10 EEHg/L3.1 10/2/23SM21-23 6200B25n-Propylbenzene ND 12 10/3/23 5:10 EEHg/L3.8 10/2/23SM21-23 6200B25Styrene ND 12 10/3/23 5:10 EEHg/L3.4 10/2/23SM21-23 6200B251,1,2,2-Tetrachloroethane ND 12 10/3/23 5:10 EEHg/L4.2 10/2/23SM21-23 6200B25Tetrachloroethylene 690 12 10/3/23 5:10 EEHg/L5.6 10/2/23SM21-23 6200B25Toluene ND 25 10/3/23 5:10 EEHg/L8.6 10/2/23SM21-23 6200B251,2,3-Trichlorobenzene ND 12 10/3/23 5:10 EEHg/L7.5 10/2/23SM21-23 6200B251,2,4-Trichlorobenzene ND 12 10/3/23 5:10 EEHg/L3.7 10/2/23SM21-23 6200B251,1,1-Trichloroethane ND 12 10/3/23 5:10 EEHg/L4.8 10/2/23SM21-23 6200B251,1,2-Trichloroethane ND 12 10/3/23 5:10 EEHg/L4.4 10/2/23SM21-23 6200B25Trichloroethylene ND 12 10/3/23 5:10 EEHg/L3.9 10/2/23SM21-23 6200B25Trichlorofluoromethane (Freon 11) ND 12 10/3/23 5:10 EEHg/L6.9 10/2/23SM21-23 6200B251,2,3-Trichloropropane 360 12 10/3/23 5:10 EEHg/L5.0 10/2/23SM21-23 6200B251,2,4-Trimethylbenzene 110 12 10/3/23 5:10 EEHg/L3.7 10/2/23SM21-23 6200B251,3,5-Trimethylbenzene ND 500 10/3/23 5:10 EEHg/L42 10/2/23SM21-23 6200B25Vinyl Acetate ND 12 10/3/23 5:10 EEHg/L5.9 10/2/23SM21-23 6200B25Vinyl Chloride 750 25 10/3/23 5:10 EEHg/L12 10/2/23SM21-23 6200B25m+p Xylene 73 12 10/3/23 5:10 EEHg/L6.1 10/2/23SM21-23 6200B25o-Xylene Surrogates % Recovery Recovery Limits Flag/Qual 1,2-Dichloroethane-d4 96.8 10/3/23 5:1070-130 1,2-Dichloroethane-d4 98.6 10/3/23 6:5070-130 Toluene-d8 103 10/3/23 6:5070-130 Toluene-d8 104 10/3/23 5:1070-130 4-Bromofluorobenzene 106 10/3/23 5:1070-130 4-Bromofluorobenzene 102 10/3/23 6:5070-130 39 Spruce Street * East Longmeadow, MA 01028 * FAX 413/525-6405 * TEL. 413/525-2332 Date Received: 9/28/2023 Work Order: 23I3819Sample Description:Project Location: Durham, NC Sample ID: 23I3819-02 Field Sample #: EB Sample Matrix: Equipment Blank Water Sampled: 9/26/2023 15:40 [TOC_2]23I3819-02[TOC] AnalystAnalyzedDilutionFlag/QualRLResultsAnalyte Date/Time DL Units Date PreparedMethod Volatile Organic Compounds by GC/MS ND 50 10/3/23 0:36 EEHg/L2.0 10/2/23SM21-23 6200B1Acetone ND 0.50 10/3/23 0:36 EEHg/L0.18 10/2/23SM21-23 6200B1Benzene ND 0.50 10/3/23 0:36 EEHg/L0.15 10/2/23SM21-23 6200B1Bromobenzene ND 0.50 10/3/23 0:36 EEHg/L0.28 10/2/23SM21-23 6200B1Bromochloromethane 0.57 0.50 10/3/23 0:36 EEHg/L0.16 10/2/23SM21-23 6200B1Bromodichloromethane ND 0.50 10/3/23 0:36 EEHg/L0.41 10/2/23SM21-23 6200B1Bromoform ND 2.0 10/3/23 0:36 EEHg/L1.3 10/2/23SM21-23 6200B1Bromomethane ND 5.0 10/3/23 0:36 EEHg/L1.7 10/2/23SM21-23 6200B12-Butanone (MEK) ND 0.50 10/3/23 0:36 EEHg/L0.15 10/2/23SM21-23 6200B1n-Butylbenzene ND 0.50 10/3/23 0:36 EEHg/L0.13 10/2/23SM21-23 6200B1sec-Butylbenzene ND 0.50 10/3/23 0:36 EEHg/L0.14 10/2/23SM21-23 6200B1tert-Butylbenzene ND 1.0 10/3/23 0:36 EEHg/L0.16 10/2/23SM21-23 6200B1Carbon Tetrachloride ND 0.50 10/3/23 0:36 EEHg/L0.12 10/2/23SM21-23 6200B1Chlorobenzene ND 50 10/3/23 0:36 EEHg/L20 10/2/23SM21-23 6200B1Ethanol ND 0.50 10/3/23 0:36 EEHg/L0.20 10/2/23SM21-23 6200B1Chlorodibromomethane ND 0.50 10/3/23 0:36 EEHg/L0.34 10/2/23SM21-23 6200B1Chloroethane 1.7 0.50 10/3/23 0:36 EEHg/L0.14 10/2/23SM21-23 6200B1Chloroform ND 0.60 10/3/23 0:36 EEHg/L0.50 10/2/23SM21-23 6200B1Chloromethane ND 0.50 10/3/23 0:36 EEHg/L0.15 10/2/23SM21-23 6200B12-Chlorotoluene ND 0.50 10/3/23 0:36 EEHg/L0.15 10/2/23SM21-23 6200B14-Chlorotoluene ND 0.50 10/3/23 0:36 EEHg/L0.16 10/2/23SM21-23 6200B11,2-Dibromoethane (EDB) ND 0.50 10/3/23 0:36 EEHg/L0.13 10/2/23SM21-23 6200B11,2-Dichlorobenzene ND 0.50 10/3/23 0:36 EEHg/L0.14 10/2/23SM21-23 6200B11,3-Dichlorobenzene ND 0.50 10/3/23 0:36 EEHg/L0.13 10/2/23SM21-23 6200B11,4-Dichlorobenzene ND 0.50 10/3/23 0:36 EEHg/L0.16 10/2/23SM21-23 6200B1Dichlorodifluoromethane (Freon 12) ND 0.50 10/3/23 0:36 EEHg/L0.14 10/2/23SM21-23 6200B11,1-Dichloroethane ND 1.0 10/3/23 0:36 EEHg/L0.30 10/2/23SM21-23 6200B11,2-Dichloroethane ND 0.50 10/3/23 0:36 EEHg/L0.14 10/2/23SM21-23 6200B11,1-Dichloroethylene ND 0.50 10/3/23 0:36 EEHg/L0.14 10/2/23SM21-23 6200B1cis-1,2-Dichloroethylene ND 0.50 10/3/23 0:36 EEHg/L0.17 10/2/23SM21-23 6200B1trans-1,2-Dichloroethylene ND 0.50 10/3/23 0:36 EEHg/L0.19 10/2/23SM21-23 6200B11,2-Dichloropropane ND 0.50 10/3/23 0:36 EEHg/L0.12 10/2/23SM21-23 6200B11,3-Dichloropropane ND 0.50 10/3/23 0:36 EEHg/L0.35 10/2/23SM21-23 6200B12,2-Dichloropropane ND 0.50 10/3/23 0:36 EEHg/L0.15 10/2/23SM21-23 6200B11,1-Dichloropropene ND 0.50 10/3/23 0:36 EEHg/L0.16 10/2/23SM21-23 6200B1cis-1,3-Dichloropropene ND 0.50 10/3/23 0:36 EEHg/L0.14 10/2/23SM21-23 6200B1trans-1,3-Dichloropropene ND 0.50 10/3/23 0:36 EEHg/L0.20 10/2/23SM21-23 6200B1Diisopropyl Ether (DIPE) ND 0.50 10/3/23 0:36 EEHg/L0.22 10/2/23SM21-23 6200B1Ethylbenzene ND 5.0 10/3/23 0:36 EEHg/L1.2 10/2/23SM21-23 6200B12-Hexanone (MBK) ND 0.50 10/3/23 0:36 EEHg/L0.15 10/2/23SM21-23 6200B1Isopropylbenzene (Cumene) ND 0.50 10/3/23 0:36 EEHg/L0.13 10/2/23SM21-23 6200B1p-Isopropyltoluene (p-Cymene) ND 0.50 10/3/23 0:36 EEHg/L0.17 10/2/23SM21-23 6200B1Methyl tert-Butyl Ether (MTBE) ND 5.0 10/3/23 0:36 EEHg/L0.18 10/2/23SM21-23 6200B1Methylene Chloride ND 5.0 10/3/23 0:36 EEHg/L1.3 10/2/23SM21-23 6200B14-Methyl-2-pentanone (MIBK) 39 Spruce Street * East Longmeadow, MA 01028 * FAX 413/525-6405 * TEL. 413/525-2332 Date Received: 9/28/2023 Work Order: 23I3819Sample Description:Project Location: Durham, NC Sample ID: 23I3819-02 Field Sample #: EB Sample Matrix: Equipment Blank Water Sampled: 9/26/2023 15:40 AnalystAnalyzedDilutionFlag/QualRLResultsAnalyte Date/Time DL Units Date PreparedMethod Volatile Organic Compounds by GC/MS ND 0.50 10/3/23 0:36 EEHg/L0.38 10/2/23SM21-23 6200B1Naphthalene ND 0.50 10/3/23 0:36 EEHg/L0.12 10/2/23SM21-23 6200B1n-Propylbenzene ND 0.50 10/3/23 0:36 EEHg/L0.15 10/2/23SM21-23 6200B1Styrene ND 0.50 10/3/23 0:36 EEHg/L0.14 10/2/23SM21-23 6200B11,1,2,2-Tetrachloroethane ND 0.50 10/3/23 0:36 EEHg/L0.17 10/2/23SM21-23 6200B1Tetrachloroethylene ND 0.50 10/3/23 0:36 EEHg/L0.22 10/2/23SM21-23 6200B1Toluene ND 1.0 10/3/23 0:36 EEHg/L0.34 10/2/23SM21-23 6200B11,2,3-Trichlorobenzene ND 0.50 10/3/23 0:36 EEHg/L0.30 10/2/23SM21-23 6200B11,2,4-Trichlorobenzene ND 0.50 10/3/23 0:36 EEHg/L0.15 10/2/23SM21-23 6200B11,1,1-Trichloroethane ND 0.50 10/3/23 0:36 EEHg/L0.19 10/2/23SM21-23 6200B11,1,2-Trichloroethane ND 0.50 10/3/23 0:36 EEHg/L0.17 10/2/23SM21-23 6200B1Trichloroethylene ND 0.50 10/3/23 0:36 EEHg/L0.15 10/2/23SM21-23 6200B1Trichlorofluoromethane (Freon 11) ND 0.50 10/3/23 0:36 EEHg/L0.28 10/2/23SM21-23 6200B11,2,3-Trichloropropane ND 0.50 10/3/23 0:36 EEHg/L0.20 10/2/23SM21-23 6200B11,2,4-Trimethylbenzene ND 0.50 10/3/23 0:36 EEHg/L0.15 10/2/23SM21-23 6200B11,3,5-Trimethylbenzene ND 20 10/3/23 0:36 EEHg/L1.7 10/2/23SM21-23 6200B1Vinyl Acetate ND 0.50 10/3/23 0:36 EEHg/L0.24 10/2/23SM21-23 6200B1Vinyl Chloride ND 1.0 10/3/23 0:36 EEHg/L0.49 10/2/23SM21-23 6200B1m+p Xylene ND 0.50 10/3/23 0:36 EEHg/L0.24 10/2/23SM21-23 6200B1o-Xylene Surrogates % Recovery Recovery Limits Flag/Qual 1,2-Dichloroethane-d4 99.8 10/3/23 0:3670-130 Toluene-d8 104 10/3/23 0:3670-130 4-Bromofluorobenzene 102 10/3/23 0:3670-130 39 Spruce Street * East Longmeadow, MA 01028 * FAX 413/525-6405 * TEL. 413/525-2332 Date Received: 9/28/2023 Work Order: 23I3819Sample Description:Project Location: Durham, NC Sample ID: 23I3819-03 Field Sample #: TB Sample Matrix: Trip Blank Water Sampled: 9/26/2023 00:00 [TOC_2]23I3819-03[TOC] AnalystAnalyzedDilutionFlag/QualRLResultsAnalyte Date/Time DL Units Date PreparedMethod Volatile Organic Compounds by GC/MS ND 50 10/3/23 1:04 EEHg/L2.0 10/2/23SM21-23 6200B1Acetone ND 0.50 10/3/23 1:04 EEHg/L0.18 10/2/23SM21-23 6200B1Benzene ND 0.50 10/3/23 1:04 EEHg/L0.15 10/2/23SM21-23 6200B1Bromobenzene ND 0.50 10/3/23 1:04 EEHg/L0.28 10/2/23SM21-23 6200B1Bromochloromethane ND 0.50 10/3/23 1:04 EEHg/L0.16 10/2/23SM21-23 6200B1Bromodichloromethane ND 0.50 10/3/23 1:04 EEHg/L0.41 10/2/23SM21-23 6200B1Bromoform ND 2.0 10/3/23 1:04 EEHg/L1.3 10/2/23SM21-23 6200B1Bromomethane ND 5.0 10/3/23 1:04 EEHg/L1.7 10/2/23SM21-23 6200B12-Butanone (MEK) ND 0.50 10/3/23 1:04 EEHg/L0.15 10/2/23SM21-23 6200B1n-Butylbenzene ND 0.50 10/3/23 1:04 EEHg/L0.13 10/2/23SM21-23 6200B1sec-Butylbenzene ND 0.50 10/3/23 1:04 EEHg/L0.14 10/2/23SM21-23 6200B1tert-Butylbenzene ND 1.0 10/3/23 1:04 EEHg/L0.16 10/2/23SM21-23 6200B1Carbon Tetrachloride ND 0.50 10/3/23 1:04 EEHg/L0.12 10/2/23SM21-23 6200B1Chlorobenzene ND 50 10/3/23 1:04 EEHg/L20 10/2/23SM21-23 6200B1Ethanol ND 0.50 10/3/23 1:04 EEHg/L0.20 10/2/23SM21-23 6200B1Chlorodibromomethane ND 0.50 10/3/23 1:04 EEHg/L0.34 10/2/23SM21-23 6200B1Chloroethane ND 0.50 10/3/23 1:04 EEHg/L0.14 10/2/23SM21-23 6200B1Chloroform ND 0.60 10/3/23 1:04 EEHg/L0.50 10/2/23SM21-23 6200B1Chloromethane ND 0.50 10/3/23 1:04 EEHg/L0.15 10/2/23SM21-23 6200B12-Chlorotoluene ND 0.50 10/3/23 1:04 EEHg/L0.15 10/2/23SM21-23 6200B14-Chlorotoluene ND 0.50 10/3/23 1:04 EEHg/L0.16 10/2/23SM21-23 6200B11,2-Dibromoethane (EDB) ND 0.50 10/3/23 1:04 EEHg/L0.13 10/2/23SM21-23 6200B11,2-Dichlorobenzene ND 0.50 10/3/23 1:04 EEHg/L0.14 10/2/23SM21-23 6200B11,3-Dichlorobenzene ND 0.50 10/3/23 1:04 EEHg/L0.13 10/2/23SM21-23 6200B11,4-Dichlorobenzene ND 0.50 10/3/23 1:04 EEHg/L0.16 10/2/23SM21-23 6200B1Dichlorodifluoromethane (Freon 12) ND 0.50 10/3/23 1:04 EEHg/L0.14 10/2/23SM21-23 6200B11,1-Dichloroethane ND 1.0 10/3/23 1:04 EEHg/L0.30 10/2/23SM21-23 6200B11,2-Dichloroethane ND 0.50 10/3/23 1:04 EEHg/L0.14 10/2/23SM21-23 6200B11,1-Dichloroethylene ND 0.50 10/3/23 1:04 EEHg/L0.14 10/2/23SM21-23 6200B1cis-1,2-Dichloroethylene ND 0.50 10/3/23 1:04 EEHg/L0.17 10/2/23SM21-23 6200B1trans-1,2-Dichloroethylene ND 0.50 10/3/23 1:04 EEHg/L0.19 10/2/23SM21-23 6200B11,2-Dichloropropane ND 0.50 10/3/23 1:04 EEHg/L0.12 10/2/23SM21-23 6200B11,3-Dichloropropane ND 0.50 10/3/23 1:04 EEHg/L0.35 10/2/23SM21-23 6200B12,2-Dichloropropane ND 0.50 10/3/23 1:04 EEHg/L0.15 10/2/23SM21-23 6200B11,1-Dichloropropene ND 0.50 10/3/23 1:04 EEHg/L0.16 10/2/23SM21-23 6200B1cis-1,3-Dichloropropene ND 0.50 10/3/23 1:04 EEHg/L0.14 10/2/23SM21-23 6200B1trans-1,3-Dichloropropene ND 0.50 10/3/23 1:04 EEHg/L0.20 10/2/23SM21-23 6200B1Diisopropyl Ether (DIPE) ND 0.50 10/3/23 1:04 EEHg/L0.22 10/2/23SM21-23 6200B1Ethylbenzene ND 5.0 10/3/23 1:04 EEHg/L1.2 10/2/23SM21-23 6200B12-Hexanone (MBK) ND 0.50 10/3/23 1:04 EEHg/L0.15 10/2/23SM21-23 6200B1Isopropylbenzene (Cumene) ND 0.50 10/3/23 1:04 EEHg/L0.13 10/2/23SM21-23 6200B1p-Isopropyltoluene (p-Cymene) ND 0.50 10/3/23 1:04 EEHg/L0.17 10/2/23SM21-23 6200B1Methyl tert-Butyl Ether (MTBE) ND 5.0 10/3/23 1:04 EEHg/L0.18 10/2/23SM21-23 6200B1Methylene Chloride ND 5.0 10/3/23 1:04 EEHg/L1.3 10/2/23SM21-23 6200B14-Methyl-2-pentanone (MIBK) 39 Spruce Street * East Longmeadow, MA 01028 * FAX 413/525-6405 * TEL. 413/525-2332 Date Received: 9/28/2023 Work Order: 23I3819Sample Description:Project Location: Durham, NC Sample ID: 23I3819-03 Field Sample #: TB Sample Matrix: Trip Blank Water Sampled: 9/26/2023 00:00 AnalystAnalyzedDilutionFlag/QualRLResultsAnalyte Date/Time DL Units Date PreparedMethod Volatile Organic Compounds by GC/MS ND 0.50 10/3/23 1:04 EEHg/L0.38 10/2/23SM21-23 6200B1Naphthalene ND 0.50 10/3/23 1:04 EEHg/L0.12 10/2/23SM21-23 6200B1n-Propylbenzene ND 0.50 10/3/23 1:04 EEHg/L0.15 10/2/23SM21-23 6200B1Styrene ND 0.50 10/3/23 1:04 EEHg/L0.14 10/2/23SM21-23 6200B11,1,2,2-Tetrachloroethane ND 0.50 10/3/23 1:04 EEHg/L0.17 10/2/23SM21-23 6200B1Tetrachloroethylene ND 0.50 10/3/23 1:04 EEHg/L0.22 10/2/23SM21-23 6200B1Toluene ND 1.0 10/3/23 1:04 EEHg/L0.34 10/2/23SM21-23 6200B11,2,3-Trichlorobenzene ND 0.50 10/3/23 1:04 EEHg/L0.30 10/2/23SM21-23 6200B11,2,4-Trichlorobenzene ND 0.50 10/3/23 1:04 EEHg/L0.15 10/2/23SM21-23 6200B11,1,1-Trichloroethane ND 0.50 10/3/23 1:04 EEHg/L0.19 10/2/23SM21-23 6200B11,1,2-Trichloroethane ND 0.50 10/3/23 1:04 EEHg/L0.17 10/2/23SM21-23 6200B1Trichloroethylene ND 0.50 10/3/23 1:04 EEHg/L0.15 10/2/23SM21-23 6200B1Trichlorofluoromethane (Freon 11) ND 0.50 10/3/23 1:04 EEHg/L0.28 10/2/23SM21-23 6200B11,2,3-Trichloropropane ND 0.50 10/3/23 1:04 EEHg/L0.20 10/2/23SM21-23 6200B11,2,4-Trimethylbenzene ND 0.50 10/3/23 1:04 EEHg/L0.15 10/2/23SM21-23 6200B11,3,5-Trimethylbenzene ND 20 10/3/23 1:04 EEHg/L1.7 10/2/23SM21-23 6200B1Vinyl Acetate ND 0.50 10/3/23 1:04 EEHg/L0.24 10/2/23SM21-23 6200B1Vinyl Chloride ND 1.0 10/3/23 1:04 EEHg/L0.49 10/2/23SM21-23 6200B1m+p Xylene ND 0.50 10/3/23 1:04 EEHg/L0.24 10/2/23SM21-23 6200B1o-Xylene Surrogates % Recovery Recovery Limits Flag/Qual 1,2-Dichloroethane-d4 102 10/3/23 1:0470-130 Toluene-d8 104 10/3/23 1:0470-130 4-Bromofluorobenzene 104 10/3/23 1:0470-130 39 Spruce Street * East Longmeadow, MA 01028 * FAX 413/525-6405 * TEL. 413/525-2332 Sample Extraction Data Prep Method: SW-846 5030B-SM21-23 6200B Lab Number [Field ID]Batch DateInitial [mL]Final [mL] B353599 10/02/230.2 5.0023I3819-01 [MW-12R] B353599 10/02/230.01 5.0023I3819-01RE1 [MW-12R] B353599 10/02/235 5.0023I3819-02 [EB] B353599 10/02/235 5.0023I3819-03 [TB] [TOC_1]Sample Preparation Information[TOC] 39 Spruce Street * East Longmeadow, MA 01028 * FAX 413/525-6405 * TEL. 413/525-2332 Result Limit Reporting Units Level Spike Result Source %REC %REC Limits RPD RPD Limit Notes Analyte Volatile Organic Compounds by GC/MS - Quality Control QUALITY CONTROL [TOC_2]Volatile Organic Compounds by GC/MS[TOC] Batch B353599 - SW-846 5030B [TOC_3]B353599[TOC] Blank (B353599-BLK1) Prepared & Analyzed: 10/02/23 Acetone g/L50ND Benzene g/L0.50ND Bromobenzene g/L0.50ND Bromochloromethane g/L0.50ND Bromodichloromethane g/L0.50ND Bromoform g/L0.50ND Bromomethane g/L2.0ND 2-Butanone (MEK)g/L5.0ND n-Butylbenzene g/L0.50ND sec-Butylbenzene g/L0.50ND tert-Butylbenzene g/L0.50ND Carbon Tetrachloride g/L0.50ND Chlorobenzene g/L0.50ND Ethanol g/L50ND Chlorodibromomethane g/L0.50ND Chloroethane g/L0.50ND Chloroform g/L0.50ND Chloromethane g/L0.60ND 2-Chlorotoluene g/L0.50ND 4-Chlorotoluene g/L0.50ND 1,2-Dibromoethane (EDB)g/L0.50ND 1,2-Dichlorobenzene g/L0.50ND 1,3-Dichlorobenzene g/L0.50ND 1,4-Dichlorobenzene g/L0.50ND Dichlorodifluoromethane (Freon 12)g/L0.50ND 1,1-Dichloroethane g/L0.50ND 1,2-Dichloroethane g/L0.50ND 1,1-Dichloroethylene g/L0.50ND cis-1,2-Dichloroethylene g/L0.50ND trans-1,2-Dichloroethylene g/L0.50ND 1,2-Dichloropropane g/L0.50ND 1,3-Dichloropropane g/L0.50ND 2,2-Dichloropropane g/L0.50ND 1,1-Dichloropropene g/L0.50ND cis-1,3-Dichloropropene g/L0.50ND trans-1,3-Dichloropropene g/L0.50ND Diisopropyl Ether (DIPE)g/L0.50ND Ethylbenzene g/L0.50ND 2-Hexanone (MBK)g/L5.0ND Isopropylbenzene (Cumene)g/L0.50ND p-Isopropyltoluene (p-Cymene)g/L0.50ND Methyl tert-Butyl Ether (MTBE)g/L0.50ND Methylene Chloride g/L5.0ND 4-Methyl-2-pentanone (MIBK)g/L5.0ND Naphthalene g/L0.50ND n-Propylbenzene g/L0.50ND Styrene g/L0.50ND 1,1,2,2-Tetrachloroethane g/L0.50ND Tetrachloroethylene g/L0.50ND Toluene g/L0.50ND 1,2,3-Trichlorobenzene g/L1.0ND 1,2,4-Trichlorobenzene g/L0.50ND [TOC_1]QC Data[TOC] 39 Spruce Street * East Longmeadow, MA 01028 * FAX 413/525-6405 * TEL. 413/525-2332 Result Limit Reporting Units Level Spike Result Source %REC %REC Limits RPD RPD Limit Notes Analyte Volatile Organic Compounds by GC/MS - Quality Control QUALITY CONTROL Batch B353599 - SW-846 5030B Blank (B353599-BLK1) Prepared & Analyzed: 10/02/23 1,1,1-Trichloroethane g/L0.50ND 1,1,2-Trichloroethane g/L0.50ND Trichloroethylene g/L0.50ND Trichlorofluoromethane (Freon 11)g/L0.50ND 1,2,3-Trichloropropane g/L0.50ND 1,2,4-Trimethylbenzene g/L0.50ND 1,3,5-Trimethylbenzene g/L0.50ND Vinyl Acetate g/L20ND Vinyl Chloride g/L0.50ND m+p Xylene g/L1.0ND o-Xylene g/L0.50ND g/L 25.0 70-130Surrogate: 1,2-Dichloroethane-d4 10025.1 g/L 25.0 70-130Surrogate: Toluene-d8 10426.0 g/L 25.0 70-130Surrogate: 4-Bromofluorobenzene 10325.7 LCS (B353599-BS1) Prepared & Analyzed: 10/02/23 Acetone g/L50 100 70-130103103 Benzene g/L0.50 10.0 70-13010510.5 Bromobenzene g/L0.50 10.0 70-13010010.0 Bromochloromethane g/L0.50 10.0 70-13011311.3 Bromodichloromethane g/L0.50 10.0 70-13010510.5 Bromoform g/L0.50 10.0 70-13010110.1 Bromomethane g/L2.0 10.0 60-14010510.5 2-Butanone (MEK)g/L5.0 100 70-130111111 n-Butylbenzene g/L0.50 10.0 70-13088.48.84 sec-Butylbenzene g/L0.50 10.0 70-13087.58.75 tert-Butylbenzene g/L0.50 10.0 70-13085.68.56 Carbon Tetrachloride g/L0.50 10.0 70-13011611.6 Chlorobenzene g/L0.50 10.0 70-13099.09.90 Ethanol g/L50 100 70-13076.376.3 Chlorodibromomethane g/L0.50 10.0 70-13010710.7 Chloroethane g/L0.50 10.0 60-14011511.5 Chloroform g/L0.50 10.0 70-13010110.1 Chloromethane g/L0.60 10.0 60-14066.46.64 2-Chlorotoluene g/L0.50 10.0 70-13090.99.09 4-Chlorotoluene g/L0.50 10.0 70-13010210.2 1,2-Dibromoethane (EDB)g/L0.50 10.0 70-13010910.9 1,2-Dichlorobenzene g/L0.50 10.0 70-13092.99.29 1,3-Dichlorobenzene g/L0.50 10.0 70-13091.69.16 1,4-Dichlorobenzene g/L0.50 10.0 70-13089.68.96 Dichlorodifluoromethane (Freon 12)g/L0.50 10.0 60-14090.49.04 1,1-Dichloroethane g/L0.50 10.0 70-13099.59.95 1,2-Dichloroethane g/L0.50 10.0 70-13093.09.30 1,1-Dichloroethylene g/L0.50 10.0 70-13086.88.68 cis-1,2-Dichloroethylene g/L0.50 10.0 70-13010110.1 trans-1,2-Dichloroethylene g/L0.50 10.0 70-13096.49.64 1,2-Dichloropropane g/L0.50 10.0 70-13010310.3 1,3-Dichloropropane g/L0.50 10.0 70-13010910.9 2,2-Dichloropropane g/L0.50 10.0 70-13092.19.21 1,1-Dichloropropene g/L0.50 10.0 70-13098.79.87 cis-1,3-Dichloropropene g/L0.50 10.0 70-13010210.2 trans-1,3-Dichloropropene g/L0.50 10.0 70-13010210.2 39 Spruce Street * East Longmeadow, MA 01028 * FAX 413/525-6405 * TEL. 413/525-2332 Result Limit Reporting Units Level Spike Result Source %REC %REC Limits RPD RPD Limit Notes Analyte Volatile Organic Compounds by GC/MS - Quality Control QUALITY CONTROL Batch B353599 - SW-846 5030B LCS (B353599-BS1) Prepared & Analyzed: 10/02/23 Diisopropyl Ether (DIPE)g/L0.50 10.0 70-13010610.6 Ethylbenzene g/L0.50 10.0 70-13094.29.42 2-Hexanone (MBK)g/L5.0 100 70-130110110 Isopropylbenzene (Cumene)g/L0.50 10.0 70-13097.79.77 p-Isopropyltoluene (p-Cymene)g/L0.50 10.0 70-13088.58.85 Methyl tert-Butyl Ether (MTBE)g/L0.50 10.0 70-13010710.7 Methylene Chloride g/L5.0 10.0 70-13092.79.27 4-Methyl-2-pentanone (MIBK)g/L5.0 100 70-130107107 Naphthalene g/L0.50 10.0 70-13091.89.18 n-Propylbenzene g/L0.50 10.0 70-13097.29.72 Styrene g/L0.50 10.0 70-13098.69.86 1,1,2,2-Tetrachloroethane g/L0.50 10.0 70-13098.99.89 Tetrachloroethylene g/L0.50 10.0 70-13099.49.94 Toluene g/L0.50 10.0 70-13099.19.91 1,2,3-Trichlorobenzene g/L1.0 10.0 70-13091.19.11 1,2,4-Trichlorobenzene g/L0.50 10.0 70-13086.58.65 1,1,1-Trichloroethane g/L0.50 10.0 70-13099.19.91 1,1,2-Trichloroethane g/L0.50 10.0 70-13010910.9 Trichloroethylene g/L0.50 10.0 70-13010010.0 Trichlorofluoromethane (Freon 11)g/L0.50 10.0 70-13094.79.47 1,2,3-Trichloropropane g/L0.50 10.0 70-13010610.6 1,2,4-Trimethylbenzene g/L0.50 10.0 70-13087.88.78 1,3,5-Trimethylbenzene g/L0.50 10.0 70-13097.59.75 Vinyl Acetate g/L20 100 70-13074.874.8 Vinyl Chloride g/L0.50 10.0 60-14077.57.75 m+p Xylene g/L1.0 20.0 70-13098.419.7 o-Xylene g/L0.50 10.0 70-13010210.2 g/L 25.0 70-130Surrogate: 1,2-Dichloroethane-d4 10025.0 g/L 25.0 70-130Surrogate: Toluene-d8 10325.7 g/L 25.0 70-130Surrogate: 4-Bromofluorobenzene 10726.7 LCS Dup (B353599-BSD1) Prepared & Analyzed: 10/02/23 Acetone g/L50 100 2570-13098.9 3.6998.9 Benzene g/L0.50 10.0 2570-130110 4.7511.0 Bromobenzene g/L0.50 10.0 2570-130105 4.7710.5 Bromochloromethane g/L0.50 10.0 2570-130117 3.3111.7 Bromodichloromethane g/L0.50 10.0 2570-130108 3.3710.8 Bromoform g/L0.50 10.0 2570-130103 1.6710.3 Bromomethane g/L2.0 10.0 2560-140108 2.6410.8 2-Butanone (MEK)g/L5.0 100 2570-130112 0.701112 n-Butylbenzene g/L0.50 10.0 2570-13089.4 1.128.94 sec-Butylbenzene g/L0.50 10.0 2570-13090.9 3.819.09 tert-Butylbenzene g/L0.50 10.0 2570-13087.1 1.748.71 Carbon Tetrachloride g/L0.50 10.0 2570-130120 2.8012.0 Chlorobenzene g/L0.50 10.0 2570-130102 2.6910.2 Ethanol g/L50 100 2570-13080.9 5.8980.9 Chlorodibromomethane g/L0.50 10.0 2570-130114 6.0611.4 Chloroethane g/L0.50 10.0 2560-140118 2.6511.8 Chloroform g/L0.50 10.0 2570-130105 3.5010.5 Chloromethane g/L0.60 10.0 2560-14075.1 12.37.51 2-Chlorotoluene g/L0.50 10.0 2570-13095.3 4.739.53 4-Chlorotoluene g/L0.50 10.0 2570-130106 3.8510.6 39 Spruce Street * East Longmeadow, MA 01028 * FAX 413/525-6405 * TEL. 413/525-2332 Result Limit Reporting Units Level Spike Result Source %REC %REC Limits RPD RPD Limit Notes Analyte Volatile Organic Compounds by GC/MS - Quality Control QUALITY CONTROL Batch B353599 - SW-846 5030B LCS Dup (B353599-BSD1) Prepared & Analyzed: 10/02/23 1,2-Dibromoethane (EDB)g/L0.50 10.0 2570-130113 3.2411.3 1,2-Dichlorobenzene g/L0.50 10.0 2570-13092.7 0.2169.27 1,3-Dichlorobenzene g/L0.50 10.0 2570-13095.2 3.859.52 1,4-Dichlorobenzene g/L0.50 10.0 2570-13092.7 3.409.27 Dichlorodifluoromethane (Freon 12)g/L0.50 10.0 2560-14092.8 2.629.28 1,1-Dichloroethane g/L0.50 10.0 2570-130104 4.6110.4 1,2-Dichloroethane g/L0.50 10.0 2570-13094.7 1.819.47 1,1-Dichloroethylene g/L0.50 10.0 2570-13088.5 1.948.85 cis-1,2-Dichloroethylene g/L0.50 10.0 2570-130104 3.4210.4 trans-1,2-Dichloroethylene g/L0.50 10.0 2570-13097.0 0.6209.70 1,2-Dichloropropane g/L0.50 10.0 2570-130107 3.7110.7 1,3-Dichloropropane g/L0.50 10.0 2570-130111 1.2711.1 2,2-Dichloropropane g/L0.50 10.0 2570-13094.7 2.789.47 1,1-Dichloropropene g/L0.50 10.0 2570-130102 3.5810.2 cis-1,3-Dichloropropene g/L0.50 10.0 2570-130108 5.8210.8 trans-1,3-Dichloropropene g/L0.50 10.0 2570-130106 3.8410.6 Diisopropyl Ether (DIPE)g/L0.50 10.0 2570-130108 1.8810.8 Ethylbenzene g/L0.50 10.0 2570-13095.9 1.799.59 2-Hexanone (MBK)g/L5.0 100 2570-130109 0.830109 Isopropylbenzene (Cumene)g/L0.50 10.0 2570-130102 4.0110.2 p-Isopropyltoluene (p-Cymene)g/L0.50 10.0 2570-13091.4 3.229.14 Methyl tert-Butyl Ether (MTBE)g/L0.50 10.0 2570-130107 0.74810.7 Methylene Chloride g/L5.0 10.0 2570-13095.7 3.189.57 4-Methyl-2-pentanone (MIBK)g/L5.0 100 2570-130111 3.05111 Naphthalene g/L0.50 10.0 2570-13094.1 2.479.41 n-Propylbenzene g/L0.50 10.0 2570-130102 4.5210.2 Styrene g/L0.50 10.0 2570-130102 3.1910.2 1,1,2,2-Tetrachloroethane g/L0.50 10.0 2570-130103 4.3510.3 Tetrachloroethylene g/L0.50 10.0 2570-130105 5.7610.5 Toluene g/L0.50 10.0 2570-130104 4.4410.4 1,2,3-Trichlorobenzene g/L1.0 10.0 2570-13095.9 5.139.59 1,2,4-Trichlorobenzene g/L0.50 10.0 2570-13089.6 3.528.96 1,1,1-Trichloroethane g/L0.50 10.0 2570-130103 4.1510.3 1,1,2-Trichloroethane g/L0.50 10.0 2570-130114 3.9511.4 Trichloroethylene g/L0.50 10.0 2570-130110 9.3111.0 Trichlorofluoromethane (Freon 11)g/L0.50 10.0 2570-13097.9 3.329.79 1,2,3-Trichloropropane g/L0.50 10.0 2570-130107 0.93810.7 1,2,4-Trimethylbenzene g/L0.50 10.0 2570-13090.5 3.039.05 1,3,5-Trimethylbenzene g/L0.50 10.0 2570-130102 4.8010.2 Vinyl Acetate g/L20 100 2570-13082.3 9.5582.3 Vinyl Chloride g/L0.50 10.0 2560-14075.4 2.757.54 m+p Xylene g/L1.0 20.0 2570-130101 2.5620.2 o-Xylene g/L0.50 10.0 2570-130104 2.6210.4 g/L 25.0 70-130Surrogate: 1,2-Dichloroethane-d4 10225.4 g/L 25.0 70-130Surrogate: Toluene-d8 10426.1 g/L 25.0 70-130Surrogate: 4-Bromofluorobenzene 10927.3 39 Spruce Street * East Longmeadow, MA 01028 * FAX 413/525-6405 * TEL. 413/525-2332 *QC result is outside of established limits. Wide recovery limits established for difficult compound. Wide RPD limits established for difficult compound. #Data exceeded client recommended or regulatory level Percent recoveries and relative percent differences (RPDs) are determined by the software using values in the calculation which have not been rounded. No results have been blank subtracted unless specified in the case narrative section. FLAG/QUALIFIER SUMMARY Detected but below the Reporting Limit (lowest calibration standard); therefore, result is an estimated concentration (CLP J-Flag). J Elevated reporting limit due to high concentration of target compounds.RL-11 [TOC_1]Flag/Qualifier Summary[TOC] 39 Spruce Street * East Longmeadow, MA 01028 * FAX 413/525-6405 * TEL. 413/525-2332 CertificationsAnalyte CERTIFICATIONS Certified Analyses included in this Report SM21-23 6200B in Water NCAcetone NCBenzene NCBromobenzene NCBromochloromethane NCBromodichloromethane NCBromoform NCBromomethane NC2-Butanone (MEK) NCn-Butylbenzene NCsec-Butylbenzene NCtert-Butylbenzene NCCarbon Tetrachloride NCChlorobenzene NCEthanol NCChlorodibromomethane NCChloroethane NCChloroform NCChloromethane NC2-Chlorotoluene NC4-Chlorotoluene NC1,2-Dibromoethane (EDB) NC1,2-Dichlorobenzene NC1,3-Dichlorobenzene NC1,4-Dichlorobenzene NCDichlorodifluoromethane (Freon 12) NC1,1-Dichloroethane NC1,2-Dichloroethane NC1,1-Dichloroethylene NCcis-1,2-Dichloroethylene NCtrans-1,2-Dichloroethylene NC1,2-Dichloropropane NC1,3-Dichloropropane NC2,2-Dichloropropane NC1,1-Dichloropropene NCcis-1,3-Dichloropropene NCtrans-1,3-Dichloropropene NCDiisopropyl Ether (DIPE) NCEthylbenzene NC2-Hexanone (MBK) NCIsopropylbenzene (Cumene) NCp-Isopropyltoluene (p-Cymene) NCMethyl tert-Butyl Ether (MTBE) NCMethylene Chloride NC4-Methyl-2-pentanone (MIBK) NCNaphthalene NCn-Propylbenzene NCStyrene [TOC_1]Certifications[TOC] 39 Spruce Street * East Longmeadow, MA 01028 * FAX 413/525-6405 * TEL. 413/525-2332 CertificationsAnalyte CERTIFICATIONS Certified Analyses included in this Report SM21-23 6200B in Water NC1,1,2,2-Tetrachloroethane NCTetrachloroethylene NCToluene NC1,2,3-Trichlorobenzene NC1,2,4-Trichlorobenzene NC1,1,1-Trichloroethane NC1,1,2-Trichloroethane NCTrichloroethylene NCTrichlorofluoromethane (Freon 11) NC1,2,3-Trichloropropane NC1,2,4-Trimethylbenzene NC1,3,5-Trimethylbenzene NCVinyl Acetate NCVinyl Chloride NCm+p Xylene NCo-Xylene The CON-TEST Environmental Laboratory operates under the following certifications and accreditations: Code Description Number Expires 652North Carolina Div. of Water QualityNC 12/31/2023 6200B