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Home My WebLink AboutWS-2275_30114_CA_MRP_20230403_Final DraftGROUNDWATER MONITORING REPORT Arlington Branco Oil Company (Incident # 30114) 270 North Main Street Jonesville, Yadkin County, North Carolina April 3, 2023 Terracon Project No. 75217015 Prepared for: North Carolina Department of Environmental Quality Division of Waste Management Raleigh, North Carolina Prepared by: Terracon Consultants, Inc. Greensboro, North Carolina Terracon Consultants, Inc. 7327-G West Friendly Avenue Greensboro, NC 27410 P 336-854-8135 F 336-365-7020 terracon.com April 3, 2023 Mr. Scott Ryals North Carolina Department of Environmental Quality Division of Waste Management 1646 Mail Service Center Raleigh, North Carolina 27699-1646 Email: scott.ryals@ncdenr.gov Re: Groundwater Monitoring Report Arlington Branco Oil Company 270 North Main Street Jonesville, Yadkin County, North Carolina UST Incident Number: 30114 Terracon Project No. 75217015 Dear Mr. Ryals: Terracon Consultants, Inc. (Terracon) is pleased to submit this Groundwater Monitoring Report for the above referenced property. This report has been prepared in general accordance with North Carolina Department of Environmental Quality (NCDEQ), UST Section Guidelines for Assessment and Corrective Action for UST Releases, dated January 19, 202,1 and Task Authorization No. TA- 03, approved on February 24, 2023. If you have any questions regarding this report or the assessment activities, please contact us at 336-854-8135. Sincerely, Terracon Consultants, Inc. F. Christopher Driscoll Edmund Woloszyn Jr. R.E.M Project Geologist Environmental Department Manager Authorized Project Reviewer Joshua A. Lopez Geophysical Group Manager Attachments Table of Contents A. SITE INFORMATION ...........................................................................................................1 B. EXECUTIVE SUMMARY .....................................................................................................2 C. SITE HISTORY AND CHARACTERIZATION ......................................................................3 C.1 Site Setting .....................................................................................................................3 C.2 Release Summary ..........................................................................................................3 C.3 Previous Investigations .................................................................................................4 C.4 Water Supply Wells ........................................................................................................8 C.5 Surface Water .................................................................................................................8 C.6 Land Use Information .....................................................................................................8 D. ASSESSMENT INFORMATION .......................................................................................9 D.1 Site Geology and Hydrogeology........................................................................................9 D.2 Sampling Activities ......................................................................................................10 D.2.1 Light Non-Aqueous Phase Liquid (LNAPL) Evaluation ................................................10 D.2.2 Groundwater Sampling Activities ................................................................................10 D.3 Analytical Results ........................................................................................................10 E. SEISMIC SURVEY ............................................................................................................11 F. CONCLUSIONS AND RECOMMENDATIONS ..................................................................12 EXHIBITS Exhibit 1: Topographic Map Exhibit 2: Site Plan Exhibit 3: Water Supply Well Location Map Exhibit 4: Groundwater Elevation Map (February 2023) Exhibit 5: Groundwater Analytical Results (February 2023) Exhibit 6A: Seismic Survey Exploration Lines Exhibit 6B: Seismic Survey Cross-Sections TABLES Table 1: Water Supply Well Information Table 2: Monitoring Well Construction Information and Historical Groundwater Elevations Table 3: Summary of Analytical Results APPENDIX Appendix A: Field Notes and Site Photographs Appendix B: Laboratory Analytical Results and Chain of Custody Form Groundwater Monitoring Report Arlington Branco - Incident No. 30114 ■ Jonesville, NC April 3, 2023 ■ Terracon Project No. 75217015 Responsive ■ Resourceful ■ Reliable 1 GROUNDWATER MONITORING REPORT A. SITE INFORMATION Date of Report: April 3, 2023 NCDEQ Incident No: 30114 Facility ID: 0-002821 Site Name: Arlington Branco Oil Company Site Location: 270 North Main Street Jonesville, Yadkin County, North Carolina Latitude / Longitude: N 36.22979 W -80.8393 UST Owner/Operator: Mr. Clay Oliver Current Property Owner: Perry and Becky Spencer 2990 Pipers Gap Mt. Airy, North Carolina 27030 Current Property Occupant: Pine Ridge Towing & Recovery 270 North Main Street Jonesville, North Carolina 28642 Consultant: Terracon Consultants, Inc. (Contact: Chris Driscoll) 7327-G West Friendly Avenue Greensboro, North Carolina 27410 (336) 365-7249 Laboratory: Pace National Center for Testing and Innovation (Pace National) 12065 Lebanon Rd Mount Juliet, Tennessee 37122 (615) 758-5858 Release Information: Release Date: Unknown, discovered 1994 Estimated Quantity: Unknown Cause of Release: UST System Currently Active Tanks: None Groundwater Monitoring Report Arlington Branco - Incident No. 30114 ■ Jonesville, NC April 3, 2023 ■ Terracon Project No. 75217015 Responsive ■ Resourceful ■ Reliable 2 I, F. Christopher Driscoll, P.G., a Licensed Geologist for Terracon Consultants, Inc., do certify that the information contained in this report is correct and accurate to the best of my knowledge. F. Christopher Driscoll, P.G. NC License No. 2695 Terracon Consultants, Inc. is licensed to practice geology/engineering in North Carolina. The certification number of the corporation is F-0869. B. EXECUTIVE SUMMARY The purpose of this report is to evaluate the likelihood of potential future impacts to Jonesville Creek from petroleum-impacted groundwater associated with an underground storage tank (UST) release at the Arlington Branco Oil Company site (Incident No. 30114). Several inactive aboveground petroleum storage tanks from past bulk petroleum operations are located in the northeastern portion of the site. Reportedly, eight former on-site USTs were removed in the early 1990s. Analytical results of soil sampling conducted beneath the former USTs indicated a petroleum release at the site in 1994. Jonesville Creek is located adjacent to the property to the west of the site. Prior sampling of surface water within Jonesville Creek dating back to 2006 has intermittently identified low levels of petroleum constituents within the creek. Terracon mobilized to the site on February 28, 2023, to collect groundwater samples from monitoring wells MW-2, MW-4, and MW-5. Upon arrival, monitoring well MW-2 was observed to be paved over with asphalt and therefore it was not sampled. After considerable effort to locate MW-5 under gravel, the monitoring well was not found and therefore it was not sampled. The property owner was present at the time of sampling and reported that MW-5 was removed from the ground during construction activities related to the road improvements on N Main Street. Prior to sample collection, Terracon gauged the groundwater elevations in the monitoring well MW-4. Depth to groundwater ranged from 15.04 feet bgs in MW-4. All wells were sampled using a submersible pump using low flow sampling techniques (i.e., <200 milliliters per minute). The groundwater samples were placed in laboratory-supplied glassware, labeled and stored in an ice-packed cooler. Based on information obtained during the completion of these assessment activities, petroleum constituents were not reported above Gross Contamination Levels (GCLs), but naphthalene was reported in well MW-4 above the 2L Standards. Terracon recommends replacing the lost monitoring wells on the site at the locations identified in the seismic survey where encountering shallow Groundwater Monitoring Report Arlington Branco - Incident No. 30114 ■ Jonesville, NC April 3, 2023 ■ Terracon Project No. 75217015 Responsive ■ Resourceful ■ Reliable 3 bedrock above the static water table is less likely. Because the well vault for MW-4 is in poor condition, the well vault should be replaced during well installation activities. Monitoring of groundwater quality should continue. C. SITE HISTORY AND CHARACTERIZATION This groundwater monitoring report was prepared for the site in response to a request by Mr. Scott Ryals, NCDEQ Incident Manager with the Division of Waste Management, State Lead Program. The purpose of this report is to determine the appropriate remediation goals at the former Arlington Branco Oil Company site located at 270 North Main Street in Jonesville, Yadkin County, North Carolina (Figures 1 and 2). The Federal/State Lead Monitoring Report was prepared in general accordance with the 15A NCAC 2L .0115 regulations and the NCDEQ UST Section Guidelines for Assessment and Corrective Action for UST Releases, dated January 19, 2021, under the supervision of Mr. F. Christopher Driscoll, a North Carolina registered Professional Geologist (North Carolina License No. 2695). C.1 Site Setting The site is a former bulk petroleum facility and gasoline filling station located at 270 North Main Street in Jonesville, North Carolina. The property, comprised of approximately 0.92 acres, contains an approximate 1,646 sq. ft. vehicle repair shop that operates as Jordan’s Pit Stop. A separate garage/shed structure and mechanic’s pit are located to the northwest of the vehicle repair shop. Several inactive aboveground petroleum storage tanks from past bulk petroleum operations are located within the northeastern portion of the site. Jonesville Creek is located on the adjacent property to the west of the site. The general site location and site layout is depicted in Figures 1 and 2. The site is bound to the southwest by Main Street (U.S. Highway 21); to the southeast and east by Dogwood Street; and to the west and northwest by Jonesville Creek. Properties to the north and east are occupied by residences while properties to the south and west are occupied by commercial businesses and residences. C.2 Release Summary According to a UST closure report completed in January 2003 by GeoScience & Technology, P.A., eight USTs were removed from the site in the early 1990s by Haynes Engineering Associates. Soil sampling by Haynes Engineering Associates (1994) and GeoScience & Technology, P.A. (2002) discovered petroleum impacts at the locations of the former USTs, the dispenser islands and product lines. A chronological summary of petroleum releases and assessment activities at the site is included in the following section of the report. Groundwater Monitoring Report Arlington Branco - Incident No. 30114 ■ Jonesville, NC April 3, 2023 ■ Terracon Project No. 75217015 Responsive ■ Resourceful ■ Reliable 4 C.3 Previous Investigations A UST Closure Report prepared by GeoScience & Technology, P.A. dated January 2003 indicates eight on-site USTs were removed in December 1992 and December 1993 by Haynes Engineering. The eight USTs consisted of two 6,000-gallon gasoline USTs, one 4,000-gallon gasoline UST, one 3,000-gallon gasoline UST, one 2,000-gallon gasoline UST, one 1,000-gallon waste oil UST, one 550-gallon kerosene UST, and one 550-gallon fuel oil UST. The UST Closure Report indicated that Haynes Engineering conducted limited soil sampling at the site in 1994; however, there are reportedly no records of the sampling activities in the NCDEQ regulatory file. GeoScience & Technology, P.A. collected soil samples in 2002 to complete the UST closure report. According to the report, the soil samples collected in 1994 indicated petroleum impacts at the locations of the former USTs. Laboratory results from the 2002 sampling event indicated petroleum constituents were detected near the dispenser islands and product lines. A Groundwater Sampling and Receptor Survey Report dated January 10, 2006, prepared by Schnabel Engineering South (Schnabel) references an incomplete Limited Site Assessment (LSA) in 2003 by GeoScience & Technology, P.A. Reportedly, GeoScience & Technology, P.A. installed two monitoring wells on the site and sampled the on-site water supply well (WSW-1). Analytical results indicated petroleum constituents were detected above the established 2L standards in the monitoring wells and six inches of LNAPL were measured in well WSW-1. The Schnabel report also referenced a groundwater sampling event conducted by Force Environmental Service Company, LLC (Force) in 2005 that reported 3.8 feet of LNAPL was measured in well MW-2. Reportedly, Force detected benzene above its Gross Contaminant Level (GCL) and multiple other petroleum constituents above the established 2L standards in well MW-1. Naphthalene and 1,2,4- trimethylbenzene were detected above their GCLs and sec-butylbenzene, 1,3,5-trimethylbenzene, and xylenes were detected above the established 2L standards in well WSW-1. Schnabel also conducted a receptor survey and identified eleven water supply wells within a 1,500-foot radius of the site. Schnabel also noted that municipal water is available to the site area. In a Monitoring Well Installation, Groundwater and Water Supply Well Sampling Report dated October 2006, Schnabel reportedly installed four additional monitoring wells (MW-3, MW-4, MW-5 and MW-6) at the site. According to the report, soil samples from borings MW-4, MW-5 and MW-6 exceeded the regulatory action level for total petroleum hydrocarbons-diesel range organics (TPH- DRO). Schnabel also reported various petroleum constituents were detected above the 2L standards in wells MW-1, MW-3, MW-5 and MW-6. LNAPL was measured in wells MW-2 (0.45 feet) and WSW-1 (0.73 feet) in August 2006. Schnabel also sampled Jonesville Creek and off-site water supply wells WSW-6 and WSW-7. Benzene was detected in well WSW-6 at a concentration of 1.1 µg/L, which slightly exceeded the established 2L standard (1.0 µg/L). A Mobile Multi-Phase Extraction (MMPE) and Groundwater Sampling Report prepared by Schnabel dated April 2007 reported that a MMPE event was performed at on-site wells MW-1, MW-2, MW-6 and WSW-1. Prior to the MMPE event, LNAPL was measured in wells MW-2, MW-6 and WSW-1. The on-site wells were sampled about one month after the completion of the MMPE event. Based Groundwater Monitoring Report Arlington Branco - Incident No. 30114 ■ Jonesville, NC April 3, 2023 ■ Terracon Project No. 75217015 Responsive ■ Resourceful ■ Reliable 5 on the results of the sampling event, LNAPL was measured in wells MW-2 and MW-6 and various petroleum constituents were detected in wells MW-1, MW-3, MW-4, MW-5 and WSW-1 at concentrations above the established 2L standards. Force performed a groundwater sampling event in September 2008 and identified multiple petroleum constituents above the established 2L standards in wells MW-1, MW-3 and WSW-1. Benzene was detected above its GCL in well MW-1. Reportedly, 0.24 feet of LNAPL was measured in well MW-2, 0.03 feet in well MW-5, and 0.89 feet in well MW-6. Only naphthalene was detected in off-site water supply well WSW-6 at an estimated concentration of 1.6 µg/L. No constituents of concern were detected in the surface water sample from Jonesville Creek. Force also conducted a groundwater sampling event in August 2009 and reported multiple petroleum constituents above the established 2L standards in wells MW-1, MW-3, MW-4, MW-5 and WSW-1. Benzene was detected above its GCL in well MW-1. Reportedly, well MW-6 contained 0.36 feet of LNAPL. According to the report, well MW-2 could not be located. No constituents of concern were detected in the surface water sample from Jonesville Creek. Force recommended abandonment of well WSW-1 and an MMPE event at wells MW-1, MW-2 and MW-6. Force completed a second MMPE event at the site in November 2009 at wells MW-1, MW-2, MW-5, and MW-6. Reportedly, 2,800 gallons of groundwater containing volatile organic compounds were removed from the wells during the MMPE event. Subsequent groundwater sampling in December 2009 indicated LNAPL measured in wells MW-2 and MW-6 at 0.01 and 0.02 feet, respectively. Dissolved-phase petroleum constituents reportedly decreased significantly in wells MW-1, MW-4, MW-5 and WSW-1. Force performed groundwater sampling events in July 2011, October 2011 and July 2012 and identified various petroleum constituents in wells MW-1, MW-2, MW-3, MW-4, MW-6 and WSW-1 above the established 2L standards. LNAPL was detected in well MW-6 in October 2011 and July 2012. A third MMPE event was conducted at the site by Schnabel in January 2013 using wells MW-1, MW-2 and MW-6. Reportedly, a total of 4,692 gallons of water with dissolved petroleum constituents were removed from the wells during the MMPE event. Subsequent groundwater sampling completed by Force in February 2013 indicated LNAPL (0.4 feet) was detected in well MW-6. Multiple petroleum constituents were detected in wells MW-1, MW-2, MW-3 and MW-5 at concentrations above the established 2L standards; however, the dissolved-phase constituent concentrations had decreased in these wells. In November 2014, Terracon performed a groundwater monitoring event at the site. Terracon sampled the six on-site groundwater monitoring wells and obtained a surface water sample from Jonesville Creek. Terracon was unable to sample the on-site water supply well (WSW-1). Petroleum constituents were not detected in Jonesville Creek above 2B surface water standards. Multiple petroleum constituents were detected in wells MW-1, MW-2, MW-3, MW-5 and MW-6 at Groundwater Monitoring Report Arlington Branco - Incident No. 30114 ■ Jonesville, NC April 3, 2023 ■ Terracon Project No. 75217015 Responsive ■ Resourceful ■ Reliable 6 concentrations that exceeded the established 2L standards. The findings of the sampling event were issued in a Federal/State-Lead Monitoring Report dated February 2, 2015. Terracon mobilized to the site in May 2015 to sample monitoring wells MW-1 through MW-6, collect a surface water sample from Jonesville Creek and sample on-site water supply well WSW-1. Multiple petroleum constituents were detected in wells MW-1, MW-2, MW-3, MW-5 and MW-6 at concentrations that exceeded the established 2L groundwater standards. Petroleum constituents were not detected in Jonesville Creek above 2B surface water standards. Benzene and naphthalene were detected in the on-site water supply well WSW-1 at concentrations above the established 2L standards. Terracon presented the sampling results to the NCDEQ in a Federal/State-Lead Monitoring Report dated June 29, 2015. In January 2016, Terracon mobilized to the site to sample monitoring wells MW-1 through MW-6, sample on-site water supply well WSW-1, and collect a surface water sample from Jonesville Creek Multiple petroleum constituents were detected in the on-site monitoring wells at concentrations that exceeded the established 2L groundwater standards. Petroleum constituents were not detected in Jonesville Creek above 2B surface water standards. Benzene and naphthalene were detected in the on-site water supply well WSW-1 at concentrations exceeding the established 2L standards. Reportedly, well WSW-1 is not being used as a source of potable water. Terracon presented the sampling results to the NCDEQ in a Federal/State-Lead Monitoring Report dated February 11, 2016. In September 2017, Terracon mobilized to the site to sample the on-site monitoring wells and collect a surface water sample from Jonesville Creek. Multiple petroleum constituents were detected in the wells at concentrations that exceeded the established 2L groundwater standards. Petroleum constituents were not detected in Jonesville Creek above 2B surface water standards. Water supply well WSW-1 was not sampled and reportedly is not being used as a source of potable water. Terracon presented the sampling results to the NCDEQ in a Federal/State-Lead Monitoring Report dated September 4, 2017. Terracon completed sampling events at the site in August 2018 and February 2019. Analytical results were broadly similar to past sampling events, with a continued downward concentration trend apparent. Petroleum constituents were not identified within Jonesville Creek in August 2018, but benzene was detected at an estimated concentration of 0.30J µg/L in the creek in February 2019. After the February 2019 event, the North Carolina Department of Transportation abandoned wells MW-1, MW-3 and MW-6 in preparation for roadwork along Main Street. In October 2021, Terracon mobilized to the site to conduct slug testing at various on-site monitoring wells to determine a site-specific hydraulic conductivity for use in a contaminant fate and transport model. During the October mobilization, sufficient water was encountered within wells MW-4 and MW-5 to complete slug tests. Review of the slug testing data upon return from the field determined that the testing at well MW-4 had not been performed correctly. The slug testing at well MW-5 indicated very fast aquifer response to the insertion and removal of the slug, such that the depth to Groundwater Monitoring Report Arlington Branco - Incident No. 30114 ■ Jonesville, NC April 3, 2023 ■ Terracon Project No. 75217015 Responsive ■ Resourceful ■ Reliable 7 water recharged to the static water level within one minute. Terracon remobilized to the site in November 2021 to complete additional slug tests. Light non- aqueous phase liquid (LNAPL) was encountered within MW-4; as such, slug testing was only completed on well MW-5. The November slug testing efforts, which included two slug-in and one slug-out tests at well MW-5, confirmed a relatively fast aquifer response. It appears likely that the unusually fast aquifer response may be due to the well screen being located in a bedrock fracture, as described below. The results of the slug testing indicated hydraulic conductivity values of approximately 113.2 and 201.3 feet per year (ft/yr) for the slug-in tests and 5,492.5 ft/yr for the slug- out test. The average hydraulic conductivity based on these data is approximately 1,935.66 ft/yr. The boring log for well MW-5 indicates the well screen (11 to 16 ft below land surface [bls]) was installed entirely within competent gneiss bedrock (10 to 16 ft bls). As such, the slug testing is representative of hydraulic conductivity within a bedrock fracture or fracture set present at well MW- 5. The calculated average hydraulic conductivity falls within the typical range of published hydraulic conductivities for fractured igneous and metamorphic rocks (approximately 0.83 to 31,039 ft/year). In a report dated December 10, 2021 (revised June 13, 2022), Terracon conducted a fate and transport model for the evaluation of petroleum constituents detected in the on-site monitoring wells to determine the potential of the constituents to migrate into Jonesville Creek. Terracon utilized available site-specific data (contaminant concentrations [from well MW-3, the closest impacted well to Jonesville Creek], hydraulic gradient, and hydraulic conductivity) to simulate natural attenuation and transport of the contaminant plume. Two different models were utilized: 1) a model simulating biodegradation through the use of 1st order decay constants for contaminants of concern (i.e. decay half-lives); and 2) a dispersion only model. Each model predicts the benzene concentration at the point of exposure would reach 190 µg/L (also above its 2B standard) in approximately four months. Historical sampling data from the surface of Jonesville Creek has not identified benzene above 0.76 µg/L dating back to 2006. Based on this discrepancy, it appears that either the average hydraulic conductivity calculated from the slug testing at well MW-5 is not representative of subsurface conditions between well MW-3 and Jonesville Creek or the waters in the creek are diluting contaminant concentrations as they enter the creek such that the resulting concentrations are well below 2B standards. Terracon completed an additional fate and transport model using contaminant concentrations from source well MW-1 from 2005. While well MW-3 is not within the release source area, it was used as the starting point for the fate and transport model and Jonesville Creek was considered the point of exposure. Both biodegradation and dispersion only predicted the benzene concentration at the point of exposure would reach 190 µg/L (above its 2B standard) within approximately four months. Historical sampling data from the surface of Jonesville Creek has not identified benzene above 0.76 µg/L dating back to 2006. Terracon also completed an additional fate and transport model using contaminant concentrations from source well MW-1 from 2005. Transport of these contaminants was modeled for 115 feet, which is the distance between wells MW-1 and MW-3. Terracon varied the hydraulic conductivity parameter within the model until the benzene concentrations calculated for well MW-3, after 14 years, approximated the Groundwater Monitoring Report Arlington Branco - Incident No. 30114 ■ Jonesville, NC April 3, 2023 ■ Terracon Project No. 75217015 Responsive ■ Resourceful ■ Reliable 8 concentration data from well MW-3 in 2019. The hydraulic conductivity that approximated the site- specific concentration data for MW-3 was 1,000 ft/year. This version of the fate and transport model indicates the steady state concentration at Jonesville Creek, 145 feet from well MW-1, is 270 µg/L, which exceeds its 2B standard. While confidence in the fate and transport models based on the calculated hydraulic gradient from well MW-5 and using calculated and detected contaminant concentrations in well MW-3 is not high, the models indicate there is a risk to Jonesville Creek. Terracon mobilized to the site on August 9, 2022, to collect groundwater samples from monitoring wells MW-2 and MW-5. Approximately 0.03 feet of LNAPL was observed in MW-4. Due to observations from the previous sampling event, it was suspected that the LNAPL source was from a small surficial release from an adjacent aboveground storage tank (AST) that resulted from used oil entering the well through the well vault, which was observed to be in poor condition. Benzene and naphthalene were reported in well MW-2 above the 2L Standards. C.4 Water Supply Wells Reportedly, eleven water supply wells (WSW-1 through WSW-11) are located within 1,500 feet of the site including well WSW-1 which is located on the site. According to the current site occupant, well WSW-1 is not used as a source of potable water and the site is connected to municipal water. There are no known water supply wells located down-gradient of the site. According to information provided from earlier assessment activities, 10 of the wells including the on-site water supply well are inactive and are located on properties that are reportedly connected to municipal water. It is unknown if the property containing well WSW-5 is connected to municipal water. Well WSW-5 is located about 1,300 feet southeast of the site within a different local watershed and is not considered to be at risk of impact by the release at Arlington Branco based on distance from the site, inferred groundwater flow direction, and intervening topographic gradient. A water-supply well inventory prepared by others is presented in Table 1, and the approximate well locations are depicted on Figure 3 (identified as Figure 8 from previous reporting). C.5 Surface Water According to the USGS topographic map, the site is located within the drainage basin of the Yadkin River which is situated greater than 5,000 feet north of the site. Jonesville Creek, a tributary of the Yadkin River is located along the western property boundary of the site. Surface water features are depicted on Figure 1. C.6 Land Use Information The site is bound to the southwest by Main Street (U.S. Highway 21); to the southeast and east by Dogwood Street; and to the west and northwest by Jonesville Creek. Properties to the north and east are occupied by residences while properties to the south and west are occupied by commercial businesses and residences. Groundwater Monitoring Report Arlington Branco - Incident No. 30114 ■ Jonesville, NC April 3, 2023 ■ Terracon Project No. 75217015 Responsive ■ Resourceful ■ Reliable 9 D. ASSESSMENT INFORMATION D.1 Site Geology and Hydrogeology The following resources were reviewed to evaluate site-specific geological and hydrogeological characteristics. Elkin South Quadrangle, North Carolina, USGS 7.5-minute series topographic maps, dated 1996 (Figure 1). Geologic Map of North Carolina, dated 1985. The Geology of the Carolinas, Carolina Geological Society Fiftieth Anniversary Volume, edited by J. Wright Horton, Jr., and Victor A. Zullo, The University of Tennessee Press, dated 1991. Soil Survey of Yadkin County, North Carolina, US Department of Agriculture, Natural Resources Conservation Service, Web Soil Survey via the Internet, http://websoilsurvey.nrcs.usda.gov/app/ . The site is located within a thrust-faulted area of the Sauratown Mountains Anticlinorium in the Piedmont Physiographic Province. The Piedmont Province generally consists of low to medium elevation, rounded hills and long rolling northeast to southwest trending ridges with incised creeks and river channels. Underlying rock in the site area is described as fine-grained mica gneiss and metamorphosed granite. In-place chemical and physical weathering of parent rocks typically form residual soils in the Piedmont region. Weathering is facilitated by the presence of fractures, joints, and less resistant minerals in the rock. In areas not altered by erosion, alluvial deposition or the activities of man, the typical residual soil profile consists of clay-rich unconsolidated materials at the surface, transitioning to sandy silts and silty sands at depth. Typically, the boundary between soil and rock is not sharply defined. This transitional zone is termed “partially weathered rock” or saprolite. Information obtained from the Web Soil Survey for Yadkin County, depicts soils on the site as Fairview sandy clay loam (FdE2). In the Piedmont, groundwater generally occurs in pore spaces within soils and in the structural features present in the underlying rock (i.e. joints, fractures, and faults). Recharge to the water table is primarily by precipitation infiltrating the surficial soils and percolating downward under the influence of gravity to the water table (vadose zone). Typically, the water table is not a level surface, but a subdued reflection of the land surface. The depth to the water table is not consistent and is dependent upon several factors that include the amount of rainfall, permeability of the soil, the extent of fracturing in the underlying rock and the influences of groundwater pumping. Groundwater typically flows in directions parallel to the ground surface and under the influence of gravity, migrates to discharge points such as surface water features, the toes of slopes or natural springs. Fluctuations in the depth of the water table can be expected depending on variations in Groundwater Monitoring Report Arlington Branco - Incident No. 30114 ■ Jonesville, NC April 3, 2023 ■ Terracon Project No. 75217015 Responsive ■ Resourceful ■ Reliable 10 precipitation, surface water run-off and other factors not evident at the time of our subsurface exploration. Normally, the highest levels of the water table occur in late winter and spring and the lowest levels occur in the late summer and fall. Based on the groundwater elevation data gathered during this sampling event, groundwater is expected to flow to the west from the site. D.2 Sampling Activities Terracon mobilized to the site on February 28, 2023, to collect groundwater samples from monitoring wells MW-2, MW-4, and MW-5. Upon arrival, monitoring well MW-2 was observed to be paved over with asphalt and therefore it was not sampled. After considerable effort to locate MW-5 under gravel and a parked vehicle, it was not found and therefore it was not sampled. The property owner was present at the time of sampling and reported that MW-5 was removed from the ground during construction activities related to the road improvements on N Main Street. The approximate locations of the wells are shown on the Site Diagram (Exhibit 2). Field notes and site photographs are included in Appendix A. D.2.1 Light Non-Aqueous Phase Liquid (LNAPL) Evaluation LNAPL was not detected in on-site monitoring wells. D.2.2 Groundwater Sampling Activities Prior to sample collection, Terracon gauged the groundwater elevations in the monitoring well MW- 4. Depth to groundwater ranged from 15.04 feet bgs in MW-4. Current and historical groundwater elevation measurements are provided in Table 2. Based on historical groundwater elevations, shallow groundwater is estimated to flow to the south-southeast. (Exhibit 4). All wells were sampled using a peristaltic pump using low flow sampling techniques (i.e., <200 milliliters per minute). Field parameters consisting of pH, temperature, oxidation-reduction potential, and conductivity were measured at each of the well locations. The groundwater samples were placed in laboratory-supplied glassware, labeled and stored in an ice-packed cooler. The samples, along with chain-of-custody documentation, were delivered to Pace National in Mount Juliet, Tennessee for analysis of VOCs by EPA Method 6200B including MTBE, EDB, and IPE. D.3 Analytical Results The groundwater sample from MW-4 contained naphthalene (128 µg/L) at a concentration exceeding the 2L Standard, with other constituents below the 2L Standards but above MDLs. The groundwater analytical results from the monitoring wells are summarized in Table 3. The analytical results are also depicted on Exhibit 5. Copies of the laboratory analytical reports are provided in Appendix C. Groundwater Monitoring Report Arlington Branco - Incident No. 30114 ■ Jonesville, NC April 3, 2023 ■ Terracon Project No. 75217015 Responsive ■ Resourceful ■ Reliable 11 E. SEISMIC SURVEY The geophysical exploration was conducted as follows: ◼ Terracon completed three seismic arrays across the site where the former monitoring wells MW-1, MW-3, and MW-6 were located (Exhibit 6A). ◼ For each location, a linear array of twenty-four 4.5-Hz seismic sensors (geophones) were connected to a seismograph at a fixed spacing. Multiple sets of 24 geophones were setup to conduct longer arrays using a roll-along method, where needed. The following types of seismic data were recorded: ◼ Multi-channel Analysis of Surface Waves (MASW) data was collected and involves utilizing seismic source shot taken at multiple locations along each array using an instrumented sledgehammer and strike plate. The data was recorded on a laptop using Geometrics Seismodule Controller software and returned to the office for analysis utilizing SurfSeis software, engineered by the Kansas Geological Survey. Following data processing, the data was contoured and plotted using Golden Software Surfer software. The data was processed using dispersion analysis software that extracts the fundamental-mode dispersion curve(s). The curves are inverted and modeled to yield a 1D shear-wave velocity profile along the array for a corresponding depth. Using a roll-along setup and subsets of geophones, many 1D profiles are created along an array and then combined to yield a 2D profile. We based our interpretations on the stratum layers identified based on our knowledge of the site. We identified for our analyses the top of rock to correlate to shear wave velocities identified as greater than approximately 1,300 feet per second (fps). Seismic survey cross sections are displayed in Exhibit 6B. Below is a summary of our findings based on these values: ◼ Rock Locations: In general, rock was identified at depths between approximately 5 to 35 feet below the existing grade across the site. A large shallow pinnacle of rock was identified on the southeast side of the site where MW-6 was previously located. Rock generally slopes towards the northwest towards Jonesville Creek. ◼ Groundwater: Based on previous environmental groundwater monitoring reports, the depth of groundwater appears to follow the slope of rock and ranges between approximately 10 to 14 feet in depth. ◼ Monitoring Well Locations: Based on the depth to groundwater and rock, Terracon identified three areas to place replacement monitoring wells. On Line 1, an area of deeper rock is located between approximately 35 to 46 feet and would allow for a monitoring well drilled to at least 20 feet in depth without likely encountering bedrock. On Line 2, an area of deeper rock is located approximately between 48 to 132 feet and would allow for a monitoring well drilled to at least 28 feet in depth without likely encountering bedrock. On Line 3, an area of relatively deeper rock is Groundwater Monitoring Report Arlington Branco - Incident No. 30114 ■ Jonesville, NC April 3, 2023 ■ Terracon Project No. 75217015 Responsive ■ Resourceful ■ Reliable 12 located between 15 to 26 feet bgs and would allow for a monitoring well drilled to at least 16 feet in depth without likely encountering bedrock. Limitations - It should be noted that, as with any geophysical testing method, these processes rely on instrument signals to indicate physical conditions in the field. Signal information can be affected by on-site conditions beyond the control of the operator. Interpretation of those signals is based on a combination of known factors combined with the experience of the operator and geophysicist evaluating the results. Utilizing conventional observation, sampling and testing (“truthing”) of select areas is recommended to confirm the results from the geophysical surveys. As with all geophysical methods, the geophysical results provide a level of confidence but should not be considered absolute. F. CONCLUSIONS AND RECOMMENDATIONS Based on information obtained during the completion of these assessment activities, Terracon provides the following findings and conclusions. ◼ Based on historical water level measurements, groundwater flow is calculated to be towards the south-southeast. ◼ Petroleum constituents were not reported above Gross Contamination Levels (GCLs). ◼ Naphthalene was reported in well MW-4 above the 2L Standards. ◼ Based on the results of the seismic survey, approximate bedrock depths range from 5 feet bgs to 35 feet bgs across the site along the survey lines. Areas along the seismic survey lines where groundwater is above bedrock were identified. Based on the data presented in this Subsequent Monitoring report, Terracon recommends the following activities be completed at the site: ◼ Reinstall wells MW-1, MW-3 and MW-6 in locations identified by the seismic survey results where shallow bedrock is less likely to be encountered above the water table. ◼ Repair or replace the deteriorated well vault for monitoring well MW-4. ◼ Attempt to locate MW-5 with a metal detector to confirm whether it was destroyed during construction activities. ◼ Secure an abandonment agreement for on-site water supply well WSW-1 and abandon the on-site well. ◼ Continue monitoring of groundwater quality at the site once wells have been replaced. EXHIBITS TOPOGRAPHIC MAP IMAGE COURTESY OF THE U.S. GEOLOGICAL SURVEY QUADRANGLES INCLUDE: ELKIN SOUTH, NC (1/1/1996). TOPOGRAPHIC MAP 7327 W Friendly Ave Ste G Greensboro, NC 27410-6253 75217015 DIAGRAM IS FOR GENERAL LOCATION ONLY, AND IS NOT INTENDED FOR CONSTRUCTION PURPOSES Project Manager: Drawn by: Checked by: Approved by: FCD EW EW FCD Arlington March 2023 Project No. File Name: Date: 1 Exhibit 1”=2,000’ Scale: APPROXIMATE SITE BOUNDARY Arlington Branco Oil Company (Incident #30114) 270 North Main Street Jonesville, NC 2 Exhibit DIAGRAM IS FOR GENERAL LOCATION ONLY, AND IS NOT INTENDED FOR CONSTRUCTION PURPOSES 7327-G West Friendly Ave. Greensboro, NC 27410 SITE PLANProject Manager: Drawn by: Checked by: Approved by: FCD Project No. File Name: Date: Scale: 75217015 FCD EW Arlington BrancoEW AS SHOWN Arlington Branco Oil Company (Incident #30114) 270 North Main Street Jonesville, NC RESIDENTIAL MAIN STREET WOODED GARAGE MECHANICS PIT SHED ARLINGTON BRANCO OIL COMPANY STEEP SLOPE STEEP SLOPE CONCRETE WALL FORMER UST BASIN FORMER DISPENSERSFORMER UST FORMER USTs FORMER DISPENSER MW-3 (Lost) MW-4 MW-1 (Lost) MW-2 (Lost) MW-6 (Lost) MW-5 (Lost) WSW-1 approximate site boundary water supply well groundwater monitoring well March 2023 lost monitoring well BRIDGE 30 600 FEET 3 Exhibit DIAGRAM IS FOR GENERAL LOCATION ONLY, AND IS NOT INTENDED FOR CONSTRUCTION PURPOSES WATER SUPPLY WELL LOCATION MAP Arlington Branco Oil Company (Incident #30114) 270 North Main Street Jonesville, NC 1,000 ft. Radius (from release location) 1 2 4 5 3 6 8 9 7 11 10 NUMBER CORRESPONDS WITH WATER SUPPLY WELL INFORMATION LISTED IN TABLE 1 approximate site boundary 7327-G West Friendly Ave. Greensboro, NC 27410 Project Manager: Drawn by: Checked by: Approved by: FCD Project No. File Name: Date: Scale: 75217015 FCD EW Arlington BrancoEW AS SHOWN March 2023 5000FEET 4 Exhibit DIAGRAM IS FOR GENERAL LOCATION ONLY, AND IS NOT INTENDED FOR CONSTRUCTION PURPOSES GROUNDWATER ELEVATION MAP Arlington Branco Oil Company (Incident #30114) 270 North Main Street Jonesville, NC RESIDENTIAL MAIN STREET WOODED GARAGE MECHANICS PIT SHED MW-3 (Lost) MW-4 MW-1 (Lost)MW-2 (Lost)MW-6 (Lost) MW-5 (Lost) 86.53’ WSW-1 approximate site boundary water supply well groundwater monitoring well CONCRETE WALL 7327-G West Friendly Ave. Greensboro, NC 27410 Project Manager: Drawn by: Checked by: Approved by: FCD Project No. File Name: Date: Scale: 75217015 FCD EW Arlington BrancoEW AS SHOWN March 2023 lost monitoring well FORMER UST BASIN FORMER DISPENSERS FORMER UST FORMER USTs FORMER DISPENSER BRIDGE 30 600 FEET 5 Exhibit DIAGRAM IS FOR GENERAL LOCATION ONLY, AND IS NOT INTENDED FOR CONSTRUCTION PURPOSES GROUNDWATER ANALYTICAL RESULTS Arlington Branco Oil Company (Incident #30114) 270 North Main Street Jonesville, NC RESIDENTIAL MAIN STREET WOODED GARAGE MECHANICS PIT SHED ARLINGTON BRANCO OIL COMPANY BRIDGE MW-3 (Lost) MW-4 MW-1 (Lost) MW-2 (Lost) MW-6 (Lost) MW-5 (Lost) WSW-1 approximate site boundary water supply well groundwater monitoring well Sample ID: MW-4Groundwater Sample 6200 –Ethylbenzene: 35.9µg/L Naphthalene: 128 µg/L Toluene: 60.2 µg/L 1,2,4-Trimethylbenzene: 119 µg/L1,3,5-Trimethylbenzene: 32..1 µg/L Total Xylenes: 385 µg/L *Values above 2L Standards are in bold CONCRETE WALL 7327-G West Friendly Ave. Greensboro, NC 27410 Project Manager: Drawn by: Checked by: Approved by: FCD Project No. File Name: Date: Scale: 75217015 FCD EW Arlington BrancoEW AS SHOWN March 2023 lost monitoring well FORMER UST BASIN FORMER DISPENSERS FORMER UST FORMER USTs FORMER DISPENSER 30 600 FEET 6A Exhibit DIAGRAM IS FOR GENERAL LOCATION ONLY, AND IS NOT INTENDED FOR CONSTRUCTION PURPOSES SEISMIC SURVEY EXPLORATION LINES Arlington Branco Oil Company (INCIDENT #30114) 270 North Main Street Jonesville, NC7327-G West Friendly Ave. Greensboro, NC 27410 Project Manager: Drawn by: Checked by: Approved by: FCD Project No. File Name: Date: Scale: 75217015 JL EW Arlington BrancoEW March 2023 As Shown 6B Exhibit DIAGRAM IS FOR GENERAL LOCATION ONLY, AND IS NOT INTENDED FOR CONSTRUCTION PURPOSES SEISMIC SURVEY CROSS-SECTIONS Arlington Branco Oil Company (INCIDENT #30114) 270 North Main Street Jonesville, NC7327-G West Friendly Ave. Greensboro, NC 27410 Project Manager: Drawn by: Checked by: Approved by: FCD Project No. File Name: Date: Scale: 75217015 JL EW Arlington BrancoEW March 2023 As Shown TABLES TABLE 1 Water Supply Well Information Arlington Branco Oil Company Jonesville, North Carolina Terracon Project No. 75217015 NCDEQ Incident No. 30114 Well No.Property Owner Mailing Address Property Address Distance and Direction from source area Well Status Municpal Water Parcel No.Notes WSW-1 Gilbert & Glenda Nance 5608 Bethel Road Jonesville, NC 28642 270 North Main Street Jonesville, NC 28642 Site Inactive Yes 495008776511 Well inactive, no power to the well. WSW-2 Myers Ventures 5115 Jordan Myers Drive Hamptonville, NC 28020 106 Center Street Jonesville, NC 28642 1,900 feet southeast Potable Yes 495000964765 WSW-3 Ruth & Jackie Henderson 1400 Old Stage Road Yadkinville, NC 27055 214 South Jonesville Boulevard Jonesville, NC 28642 1,100 feet north Inactive Yes 495008789665 WSW-4 Jerry Brown 304 Haywood Street Jonesville, NC 28642 304 Haywood Street Jonesville, NC 28642 1,410 feet southeast Inactive Yes 495012861292 WSW-5 Dawn & James Waugh 144 Queensbury Road Winston Salem, NC 27104 220 Old Street Jonesville, NC 28642 1,315 feet southeast Inactive Unknown 495012865523 WSW-6 Christopher Reavis 2109 Buck Shoals Road Hamptonville, NC 27020 110 Pardue Street Jonesville, NC 28642 480 feet south Inactive Yes 495012776010 WSW-7 Ronald & Susan Childress 1220 Peanut Lane Yadkinville, NC 27055 247 North Main Street Jonesville, NC 28642 420 feet southeast Inactive Yes 495012778141 WSW-8 Loraine & John Hamby 119 Pickett Street Jonesville, NC 28642 119 Pickett Street Jonesville, NC 28642 735 feet east Inactive Yes 4950873588 WSW-9 Pamela Rumple 400 Wilkes Street Elkin, NC 28621 158 North Main Street Jonesville, NC 28642 940 feet east Inactive Yes 495012874290 WSW-10 Alejandra & Pena Solorzano 116 Vestal Avenue Jonesville, NC 28642 116 Vestal Avenue Jonesville, NC 28642 1,130 feet east Abandoned Yes 495008877682 WSW-11 Bobby & Brittany Young 128 Hillcrest Street Jonesville, NC 28642 128 Hillcrest Street Jonesville, NC 28642 1,150 feet northwest Inactive Yes 495007688450 TABLE 2 Monitoring Well Construction Informationand Historical Groundwater Elevations Arlington Branco Oil Company Jonesville, North Carolina Terracon Project No. 75217015 NCDEQ Incident No. 30114 Well ID DateInstalled Date WaterLevelMeasured Bottom ofWell (ft.BGS) Top ofCasingElevation(ft.) Depth toWater fromTop of Casing(ft.) LNAPLThickness (ft)GroundwaterElevation (ft.)Comments 12/1/2005 13.49 -86.51 9/14/2006 13.43 -86.57 3/20/2007 12.74 -87.269/10/2008 14.26 -85.74 12/9/2009 14.82 -85.18 7/17/2009 13.60 -86.40 7/13/2011 13.66 -86.3410/19/2011 13.50 -86.50 7/19/2012 13.21 -86.79 2/14/2013 12.66 -87.34 11/11/2014 13.54 -86.46 5/29/2015 15.99 -84.01 1/8/2016 12.16 -87.84 8/31/2017 13.90 -86.10 8/23/2018 12.03 -87.97 2/5/2019 10.56 -89.44 12/1/2005 11.47 1.10 -9/14/2006 13.60 0.17 - 2/7/2007 -0.09 - 3/20/2007 12.80 0.20 - 9/10/2008 14.51 0.24 - 12/9/2009 12.07 0.01 - 7/17/2009 --- 7/13/2011 13.80 -86.89 10/19/2011 13.97 -86.72 7/19/2012 13.13 -87.562/14/2013 12.67 -88.02 11/11/2014 13.74 -86.95 5/29/2015 14.95 -85.74 1/8/2016 ---8/31/2017 14.14 -86.55 8/23/2018 11.82 -88.87 2/5/2019 10.19 -90.50 8/9/2022 11.88 88.812/28/2023 9/14/2006 14.66 -85.88 3/20/2007 14.73 -85.81 9/10/2008 15.55 -84.9912/9/2009 13.67 -86.87 7/17/2009 15.25 -85.29 7/13/2011 15.16 -85.38 10/19/2011 15.06 -85.487/19/2012 15.01 -85.53 2/14/2013 14.75 -85.79 11/11/2014 14.94 -85.60 5/29/2015 15.06 -85.48 1/8/2016 14.64 -85.90 8/31/2017 15.28 -85.26 8/23/2018 14.42 -86.12 2/5/2019 14.52 -86.02 9/14/2006 7.46 -94.113/20/2007 15.20 -86.37 9/10/2008 16.62 -84.95 12/9/2009 16.25 -85.32 7/17/2009 16.20 -85.377/13/2011 16.06 -85.51 10/19/2011 16.02 -85.55 7/19/2012 15.69 -85.88 2/14/2013 15.10 -86.4711/11/2014 15.49 -86.08 5/29/2015 15.71 -85.86 1/8/2016 14.57 -87.00 8/31/2017 16.03 -85.548/23/2018 14.20 -87.37 2/5/2019 13.10 -88.47 8/9/2022 15.51 0.03 86.09 2/28/2023 15.04 -86.53 9/14/2006 14.37 -87.64 3/20/2007 13.95 -88.06 9/10/2008 15.71 0.03 - 12/9/2009 13.61 -88.40 7/17/2009 14.44 -87.57 7/13/2011 15.97 -86.04 10/19/2011 15.15 -86.86 7/19/2012 14.24 -87.772/14/2013 13.64 -88.37 11/11/2014 14.92 -87.09 5/29/2015 14.98 -87.03 1/8/2016 13.11 -88.908/31/2017 --- 8/23/2018 12.89 -89.12 2/5/2019 10.09 -91.92 8/9/2022 12.37 -89.642/28/2023 9/14/2006 13.47 -87.37 2/7/2007 -0.96 - 3/20/2007 13.18 0.18 - 9/10/2008 15.19 0.89 -12/9/2009 14.12 0.02 - 7/17/2009 13.98 0.36 - 7/13/2011 14.03 -86.81 10/19/2011 16.40 Unknown - 7/19/2012 13.51 0.03 - 2/14/2013 13.11 0.04 - 11/11/2014 14.12 -86.72 5/29/2015 14.12 -86.72 1/8/2016 12.53 0.02 88.338/31/2017 14.45 -86.39 8/23/2018 12.40 -88.44 2/5/2019 11.77 -89.07 Well reportedly abandonedin 2022 aspart ofNCDOT activities. 102.0116.009/14/2006MW-5 Well Abandoned MW-6 9/14/2006 20.00 100.84 Well abandoned on February 26, 2018 as part of NCDOTactivities. MW-1 Unknown 17.00 100.00 Well abandoned on February 26, 2018 aspart ofNCDOT activities. MW-2 Unknown 15.00 100.69 Well abandoned in 2022 as part ofNCDOTactivities. Well Abandoned 8/03/2006 19.00 100.54 Wellabandonedon February26, 2018 as part of NCDOT activities. MW-3 22.00 101.579/14/2006MW-4 TABLE 3 Summary of Analytical Results Arlington Branco Oil Company Jonesville, North Carolina Terracon Project No. 75217015 NCDEQ Incident No. 30114 Well/Sample I.D. Date Collected (mm/dd/yy) 12/01/2005 9,200 <100 <100 ND NA ND <100 2,700 <100 ND 4,200 ND 1,100 220 ND 11,000 1,900 450 10,100 8/03/2006 9,700 ND ND ND NA ND NA 2,800 79 ND NA ND 760 250 ND 9,000 1,900 530 10,400 3/20/2007 7,000 ND ND ND NA ND 190 3,700 130 ND 2,600 ND 100 460 ND 15,000 3,600 960 16,000 9/10/2008 6,990 134 ND ND NA ND 161 2,590 85.2 ND 2,390 ND 760 269 ND 1,680 1,780 478 5,882 7/17/2009 7,940 <250 <250 ND NA ND 340 3,740 <250 NA 5,230 ND 1,000 524 <250 5,110 3,710 939 12,990 12/09/2009 2,890 <25 <25 ND NA ND 93.2 2,780 119 NA 1,250 ND 992 364 <25 5,920 3,250 859 13,650 7/13/2011 6,600 350 <11 ND NA ND 130 5,300 280 <0.059 1,600 ND 2,200 1,200 <6.8 2,400 7,200 2,200 15,000 10/19/2011 7,400 <100 <100 ND NA ND 140 4,500 <100 NA 1,900 ND 2,300 390 <100 1,700 4,200 1,200 13,000 7/19/2012 6,100 <250 <250 ND NA ND <250 4,000 <250 <250 1,900 ND 1,500 580 <250 1,400 3,800 1,100 12,000 2/14/2013 2,400 <25 <25 ND NA ND 94.8 3,340 179 NA 1,380 ND 1,330 463 <25 2,840 3,570 1,100 13,230 11/11/2014 2,830 <12.5 <12.5 <25 <25 <12.5 <12.5 4,510 300 NA 1,050 ND 2,630 1,160 <12.5 465 7,370 2,400 12,622 5/29/2015 2,850 <12.5 <12.5 <25 <25 <12.5 107 2,950 107 NA 1,120 ND 1,020 342 <12.5 447 2,410 700 7,792.6 1/8/2016 2,230 <6.2 70 <12.5 <12.5 9.0J 90 4,130 251 NA 963 ND 2,040 940 <6.2 432 5,380 1,900 9,598 8/31/2017 2,280 <10.0 69.6 <10.0 <12.5 12.2J 83.6 3,340 162 NA 866 ND 1,530 605 <10.0 374 3,780 1,140 8,760 8/23/2018 1,710 <10.0 <10.0 <20.0 <20.0 <10.0 18.3J 3,500 125 NA 652 <40.0 1,270 502 <10.0 212 3,800 1,040 9,966 2/5/2019 2,600 107 <25.0 <50.0 <50.0 <25.0 98.6 2,910 141 NA 622 <100 1,380 <25.0 <25.0 760 3,900 1,090 11,660 12/01/2005 8/03/06 9/14/06 2/07/2007 3/20/2007 9/10/2008 7/17/2009 12/09/2009 7/13/2011 4,100 730 <27 ND NA ND <21 2,900 <17 <0.059 4,000 ND 3,800 1,300 300 15,000 17,000 4,500 19,000 10/19/2011 4,400 <200 <200 ND NA ND <200 2,700 <200 NA 3,400 ND 730 <200 <200 20,000 3,100 800 16,000 7/19/2012 4,000 <250 <250 ND NA ND <250 2,800 <250 <250 2,300 ND 1,300 490 1,200 12,000 4,200 1,100 16,000 2/14/2013 1,060 <25 <25 ND NA ND 35.1 1,270 135 NA 852 ND 877 253 <25 4,660 2,710 729 9,980 11/11/2014 987 397 <12.5 <25 <25 <12.5 <12.5 2,080 195 NA 900 ND 1,020 715 75.7 6,070 5,690 1,780 12,320 5/29/2015 1,510 <12.5 2,740 <25 <25 <12.5 72.2 1,450 89.8 NA 1,700 ND 531 290 44.8 6,050 2,480 703 8,160 1/8/2016 8/31/2017 972 <10.0 2,740 <20.0 <20.0 <10.0 25.5 1,250 102 NA 430 ND 545 389 32.8 4,060 3,190 903 6,790 8/23/2018 476 <5.0 <5.0 <10.0 <10.0 <5.0 <5.0 754 70.4 NA 93.1 <20.0 346 <5.0 <5.0 1,480 2,420 <5.0 4,360 2/5/2019 48.1 44 <1.2 <2.5 <2.5 <1.2 <1.2 150 23.6 NA 6 <5.0 124 <1.2 <1.2 174 790 <1.2 624 8/9/2022 32.9 15.6 7.1 <5.00 <2.50 <1.00 <1.00 106 15.8 15.2 <1.00 <5.00 45.4 68.6 <1.00 190 339 92.1 376 2/28/2023 1 70 70 3,000 3 0.4 70 600 70 25 20 5 6 70 70 600 400 400 500 5,000 6,900 8,500 NE 3,000 400 70,000 84,500 25,000 11,700 20,000 5,000 6,000 30,000 70,000 260,000 28,500 25,000 85,500ND denotes not detected (Detection limits are unknown for sampling conducted prior to Terracon's involvement with the site.) <- denotes less than method detection limit J indicates estimated value NS denotes not sampled. NA denotes not analyzed. NR denotes not reported. Bold denotes levels above the 2L standard. Bold and gray shading denotes levels above the GCL. 2L Standard (ug/L)GCL (ug/L) MW-1 MW-2 Analytical Method BenzeneDiisopropyl Ether(IPE)Styrenen-ButylbenzeneContaminant of Concern → 6200B Chloromethanesec-ButylbenzeneXylenes (Total)EthylbenzeneIsopropylbenzenep-Isopropyltoluene1,3,5-Trimethylbenzene1,2-Dichloroethane1,2,4-Trimethylbenzenen-PropylbenzeneMethylene ChlorideChloroethaneNot Sampled Not Sampled-LNAPL Not Sampled-LNAPL Not Sampled - Well AbandonedMethyl tert-butylether (MTBE)NaphthaleneTolueneNot Sampled-LNAPL Not Sampled Not Sampled-LNAPL Not Sampled-LNAPL Not Sampled-LNAPL Not Sampled-LNAPL 1 of 5 TABLE 3 Summary of Analytical Results Arlington Branco Oil Company Jonesville, North Carolina Terracon Project No. 75217015 NCDEQ Incident No. 30114 Well/Sample I.D. Date Collected (mm/dd/yy) Analytical Method BenzeneDiisopropyl Ether(IPE)Styrenen-ButylbenzeneContaminant of Concern → 6200B Chloromethanesec-ButylbenzeneXylenes (Total)EthylbenzeneIsopropylbenzenep-Isopropyltoluene1,3,5-Trimethylbenzene1,2-Dichloroethane1,2,4-Trimethylbenzenen-PropylbenzeneMethylene ChlorideChloroethaneMethyl tert-butylether (MTBE)NaphthaleneToluene8/03/2006 740 ND ND ND ND ND NA 3.5 6.7 ND NA ND 57 17 ND 4.4 ND ND 43.8 3/20/2007 860 ND ND ND ND ND 84 9.4 7.9 ND 9.3 ND 38 18 ND 6.5 4.7 ND 54 9/10/2008 1,070 ND ND ND ND ND 94.2 1.8 4.7 ND 6.4 ND 35.5 8.4 ND 4.7 2.3 ND 41 7/17/2009 1,330 <5.0 <5 ND <5 ND 149 13.5 9.3 NA 14.5 ND 50.4 18.8 <5 9.3 12.7 <5 75.7 12/09/2009 862 <5 <5 ND <5 ND 115 <5 7.5 NA 14 ND 52.4 17.4 <5 6.3 <5 <5 52 7/13/2011 720 1.9 0.8 ND <0.032 ND 68 3.3 11 <0.059 4.2 ND 70 22 <0.034 12 3 0.94 71 10/19/2011 1,600 1.9 0.77 ND <0.5 ND 140 4.4 16 NA 3.8 ND 100 31 <0.5 9 1 0.6 92 7/19/2012 1,400 2.9 1.8 ND <0.5 ND 150 2.8 13 <0.5 3.5 ND 95 27 <0.5 5.5 1.5 0.62 53 2/14/2013 923 <2.5 <2.5 ND <5 ND 124 3.6 13.1 NA 2.8 ND 63.9 18.1 <2.5 4 8.6 3.3 39.8 11/11/2014 953 <2.5 <2.5 <25 <5 <12.5 108 <2.5 7.8 NA <2.5 ND 66.4 16.9 <2.5 11.8 6.5 <2.5 41.7 5/29/2015 723 <2.5 <2.5 <5 <5 <2.5 101 3.1J 7.3 NA <2.5 ND 58.6 13.7 <2.5 <2.5 5.2 <2.5 32.2J 1/8/2016 782 <1.2 <1.2 <2.5 <2.5 <1.2 126 2.1J 9.0 NA 3.4 ND 69.2 18.7 <1.2 4.6 <1.2 3 27.8 8/31/2017 894 <1.2 <1.2 <2.5 <2.5 <1.2 106 2.9 10 NA <1.2 ND 75.9 20.4 <1.2 7.1 2.7 <1.2 32.9 8/23/2018 701 <1.0 <1.0 <2.0 <2.0 <1.0 92.5 <1.0 6.3 NA <1.0 20.5 48.3 10.5 <1.0 1.2J <1.0 <1.0 10.8 2/5/2019 581 <1.0 <1.0 <2.0 <2.0 <1.0 78.3 3.8 8.2 NA <1.0 <4.0 44.3 14.8 <1.0 4.3 1.6J <1.0 27.4 9/14/2006 ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND 3/20/2007 3 ND ND ND ND ND 0.72 14 0.93 ND ND ND 25 ND ND 1.4 120 37 143 9/10/2008 ND ND ND ND ND ND 0.6 ND ND ND ND ND ND ND ND ND ND ND ND 7/17/2009 1.9 <0.5 <0.5 ND <0.5 ND <0.5 <0.5 <0.5 NA <0.5 ND <2 <0.5 <0.5 <0.5 2.9 1 0.56 12/09/2009 <0.5 <0.5 <0.5 ND <0.5 ND <0.5 <0.5 <0.5 NA <0.5 ND <2 <0.5 <0.5 <0.5 <0.5 <0.5 <1.5 7/13/2011 <0.054 <0.059 <0.054 ND 1.5 ND <0.042 <0.054 <0.034 <0.059 <0.056 ND 6.9 <0.059 <0.034 1.1 0.56 <0.038 0.79J 10/19/2011 <0.5 <0.5 <0.5 ND <0.5 ND <0.5 <0.5 <0.5 NA <0.5 ND <1 <0.5 <0.5 <0.5 <0.5 <0.5 <1.5 7/19/2012 <0.5 <0.5 <0.5 ND <0.5 ND <0.5 <0.5 <0.5 <0.5 <0.5 ND <1 <0.5 <0.5 <0.5 <0.5 <0.5 <1.5 2/14/2013 <0.5 <0.5 <0.5 ND <1 ND <0.5 <0.5 <0.5 NA <0.5 ND <2 <0..5 <0.5 <0.5 <0.5 <0.5 <1.5 11/11/2014 <0.25 <0.25 <0.25 <25 <0.5 <12.5 <0.25 <0.25 <0.25 NA <0.25 ND <1 <0.25 <0.25 <0.25 <0.25 <0.25 <0.5 5/29/2015 <0.25 <0.25 <0.25 <0.5 <0.5 <0.5 <0.25 <0.25 <0.25 NA <0.25 ND <1 <0.25 <0.25 <0.25 <0.25 <0.25 <0.25 1/8/2016 <0.5 <0.5 <0.5 <0.5 <0.5 <0.5 <0.5 <0.5 <0.5 NA <0.5 ND 1.3J <0.5 <0.5 <0.5 3.7 <0.5 <0.5 8/31/2017 0.72 <0.25 <0.25 <0.5 <0.5 <0.25 <0.25 2.2 2.9 NA <0.5 ND 3.1 4.8 <0.25 <0.25 93.5 <0.5 2.3 8/23/2018 <0.25 <0.25 <0.25 <0.5 <0.5 <0.25 <0.25 <0.25 <0.25 NA <0.25 <1.0 <1.0 <0.25 <0.25 <0.25 <0.25 <0.25 <0.25 2/5/2019 <0.25 <0.25 <0.25 <0.5 <0.5 <0.25 <0.25 1.5 3.3 NA <0.25 <1.0 8.7 3.1 <0.25 <0.25 11.9 4.7 1.65J 8/9/2022 2/28/2023 <10.0 <10.0 <10.0 <50.0 <25.0 <10.0 <10.0 35.9 <10.0 <10.0 <10.0 <50.0 128 <10.0 <10.0 60.2 119 32.1 385 1 70 70 3,000 3 0.4 70 600 70 25 20 5 6 70 70 600 400 400 500 5,000 6,900 8,500 NE 3,000 400 70,000 84,500 25,000 11,700 20,000 5,000 6,000 30,000 70,000 260,000 28,500 25,000 85,500ND denotes not detected (Detection limits are unknown for sampling conducted prior to Terracon's involvement with the site.) <- denotes less than method detection limit J indicates estimated value NS denotes not sampled. NA denotes not analyzed. NR denotes not reported.Bold denotes levels above the 2L standard. Bold and gray shading denotes levels above the GCL. MW-3 2L Standard (ug/L) MW-4 Not Sampled-LNAPL (Suspected from nearby AST release) GCL (ug/L) 2 of 5 TABLE 3 Summary of Analytical Results Arlington Branco Oil Company Jonesville, North Carolina Terracon Project No. 75217015 NCDEQ Incident No. 30114 Well/Sample I.D. Date Collected (mm/dd/yy) Analytical Method BenzeneDiisopropyl Ether(IPE)Styrenen-ButylbenzeneContaminant of Concern → 6200B Chloromethanesec-ButylbenzeneXylenes (Total)EthylbenzeneIsopropylbenzenep-Isopropyltoluene1,3,5-Trimethylbenzene1,2-Dichloroethane1,2,4-Trimethylbenzenen-PropylbenzeneMethylene ChlorideChloroethaneMethyl tert-butylether (MTBE)NaphthaleneToluene9/14/2006 290 ND ND ND NA ND ND 300 31 ND 120 ND 210 140 ND 900 1,000 270 1,600 3/20/2007 34 26 ND ND NA ND ND ND 30 26 15 ND 110 94 3.5J 66 800 140 540 9/10/2008 7/17/2009 230 <2.5 <2.5 ND NA ND 4.9 294 47.8 NA 56.3 ND 320 164 7.8 409 1,190 340 1,743 12/09/2009 16.7 36.3 <2.5 ND NA ND <2.5 13.9 17 NA 3.3 ND 82.5 36.1 <2.5 11.6 483 87.9 172.9 7/13/2011 10/19/2011 350 25 7.6 ND NA ND <0.5 160 24 NA 72 ND 80 57 <0.5 140 610 82 630 7/19/2012 35 31 11 ND NA ND <0.5 11 19 2.2 <1 ND 36 27 2.6 11 230 22 56 2/14/2013 7.7 <1.2 <1.2 ND NA ND <1.2 5.9 9.4 NA <1.2 ND 28.8 14.2 <1.2 3.1 131 16.3 44.1 11/11/2014 8.5 16.1 5.4 <25 <0.5 <12.5 <0.25 21.6 14.1 NA 0.73 ND 35.6 46 <0.25 9 182 39.9 60.7 5/29/2015 3.5 10.3 <0.25 <0.5 <0.5 <0.25 <0.25 18.8 10.7 NA <0.25 ND 28.7 33.3 <0.25 7.1 146 29.2 51.1 1/8/2016 1.4 <0.5 2 <0.5 <0.5 <0.5 <0.5 3 2 NA <0.5 ND 6.7 6.6 <0.5 1 58.9 10.6 10.1 8/31/2017 8/23/2018 <0.25 <0.25 <0.25 <0.5 <0.5 <0.25 <0.25 1.3 1.4 NA <0.25 <1.0 3.6 8.6 <0.25 <0.25 32.4 0.86 1.1 2/5/2019 <0.25 <0.25 <0.25 <0.5 <0.5 <0.25 <0.25 <0.25 <0.25 NA <0.25 <1.0 1.8J 0.71 <0.25 <0.25 <0.25 <0.25 <0.5 8/9/2022 <1.00 2.13 1.34 <5.00 <2.50 <1.00 <1.00 1.78 1.22 <1.00 <1.00 <5.00 <5.00 5.17 <1.00 8.64 13.7 <1.00 1.49 2/28/20239/14/2006 3,400 <250 <250 NA <250 4,100 <250 ND <250 ND 2,000 720 ND 30,000 5,600 1,600 19,000 2/07/2007 3/20/2007 9/10/2008 7/17/2009 12/9/2009 7/13/2011 410 <12 <11 NA <8.4 3,200 <6.8 <0.059 <11 ND 1,700 460 220 14,000 4,300 1,100 17,000 10/19/2011 7/19/2012 2/14/2013 11/11/2014 48.8 226 <12.5 <25 <25 <12.5 <12.5 2,390 157 NA <12.5 ND 1,680 609 95.2 4,730 4,870 1,440 11,890 5/29/2015 50.1 <12.5 <12.5 <25 <25 <12.5 <12.5 2,530 123 NA <12.5 ND 1,260 412 109 6,640 3,250 897 11,450 1/8/2016 8/31/2017 52.8 <10.0 <10.0 <20.0 <20.0 <10.0 <10.0 2,210 74 NA <10.0 ND 927 225 101 5,450 2,090 <10.0 10,330 8/23/2018 68.4 <6.2 <6.2 <12.5 <12.5 <6.2 <6.2 2,580 99.1 NA 12.7 <25.0 1,000 <6.2 76.1 3,990 3,520 <6.2 11,770 2/5/2019 <6.2 <6.2 <6.2 <12.5 <12.5 <6.2 <6.2 2,280 90.2 NA <6.2 <25.0 930 309 90.9 3,250 2,660 705 9,920 1 70 70 3,000 3 0.4 70 600 70 25 20 5 6 70 70 600 400 400 500 5,000 6,900 8,500 NE 3,000 400 70,000 84,500 25,000 11,700 20,000 5,000 6,000 30,000 70,000 260,000 28,500 25,000 85,500 ND denotes not detected (Detection limits are unknown for sampling conducted prior to Terracon's involvement with the site.) <- denotes less than method detection limit J indicates estimated value NS denotes not sampled. NA denotes not analyzed. NR denotes not reported. Bold denotes levels above the 2L standard. Bold and gray shading denotes levels above the GCL. Not Sampled-LNAPL MW-6 Not Sampled-LNAPL Not Sampled-LNAPL Not Sampled-LNAPL Not Sampled-LNAPL Not Sampled-LNAPL Not Sampled-LNAPL Not Sampled-LNAPL Not Sampled Not Analyzed-Glassware Broke During Transit Not Sampled - Well Abandoned 2L Standard (ug/L) GCL (ug/L) MW-5 Not Sampled-LNAPL Not Sampled-LNAPL 3 of 5 TABLE 3 Summary of Analytical Results Arlington Branco Oil Company Jonesville, North Carolina Terracon Project No. 75217015 NCDEQ Incident No. 30114 Well/Sample I.D. Date Collected (mm/dd/yy) Analytical Method BenzeneDiisopropyl Ether(IPE)Styrenen-ButylbenzeneContaminant of Concern → 6200B Chloromethanesec-ButylbenzeneXylenes (Total)EthylbenzeneIsopropylbenzenep-Isopropyltoluene1,3,5-Trimethylbenzene1,2-Dichloroethane1,2,4-Trimethylbenzenen-PropylbenzeneMethylene ChlorideChloroethaneMethyl tert-butylether (MTBE)NaphthaleneToluene9/14/2006 ND ND ND ND NA ND ND ND ND ND ND ND ND ND ND ND ND ND ND 9/10/2008 <0.5 <0.5 <0.5 ND NA ND <0.5 <0.5 <0.5 <0.5 <0.5 ND <0.5 <0.5 <0.5 <0.5 <0.5 <0.5 <1.5 7/17/2009 <0.5 <0.5 <0.5 ND NA ND <0.5 <0.5 <0.5 NA <0.5 ND <2 <0.5 <0.5 <0.5 <0.5 <0.5 <1.5 12/9/2009 7/13/2011 0.58 <0.059 <0.054 ND NA ND <0.042 <0.054 <0.034 <0.059 <0.056 ND 3.5 <0.059 <0.034 0.85 <0.038 <0.038 0.84J 10/19/2011 0.76 <0.5 <0.5 ND NA ND <0.5 0.52 <0.5 <0.5 0.65J ND 0.59J <0.5 <0.5 <0.5 0.91 <0.5 1.4J 7/19/2012 2/14/2013 11/11/2014 <0.25 <0.25 <0.25 <25 <0.50 <12.5 <0.25 <0.25 <0.25 NA <0.25 ND <1 <0.25 <0.25 <0.25 <0.25 <0.25 <0.25 5/29/2015 <0.25 <0.25 <0.25 <0.5 <0.5 <0.5 <0.25 <0.25 <0.25 NA <0.25 ND <1 <0.25 <0.25 <0.25 <0.25 <0.25 <0.25 1/8/2016 0.49J <0.5 <0.5 <0.5 <0.5 <0.5 <0.5 <0.5 <0.5 NA 0.27J ND <1 <0.5 <0.5 <0.5 <0.5 <0.5 <0.5 8/31/2017 <0.25 <0.25 <0.25 <0.5 <0.5 <0.25 <0.25 <0.25 <0.25 NA <0.25 ND <0.25 <0.25 <0.25 <0.25 <0.25 <0.25 <0.25 8/23/2018 <0.25 <0.25 <0.25 <0.5 <0.5 <0.25 <0.25 <0.25 <0.25 NA <0.25 ND <0.25 <0.25 <0.25 <0.25 <0.25 <0.25 <0.25 2/5/2019 0.30J <0.25 <0.25 <0.5 <0.5 <0.25 <0.25 <0.25 <0.25 NA <0.25 <1.0 <1.0 <0.25 <0.25 <0.25 <0.25 <0.25 <0.5 12/1/2005 <250 <250 1,600 ND NA ND <250 <250 <250 NA <250 ND 18,000 <250 NA <250 76,000 12,000 15,600 8/3/2006 9/14/2006 2/7/2007 3/20/2007 19,000 <250 210J ND NA ND 2,100 7,400 310 ND 12,000 ND 3,100 100 NA 56,000 9,000 2,500 40,000 9/10/2008 10.1 <0.5 <0.5 ND NA ND <0.5 63.7 8.3 <0.5 1.6 ND 36.6 26.3 <0.5 10.6 103 45.9 62.5 7/17/2009 19.2 <2.5 <2.5 ND NA ND <2.5 260 27.7 NA 3.3 ND 227 90.5 <2.5 47 567 161 551.7 12/9/2009 14.2 43.2 <2.5 ND NA ND <2.5 289 36.8 NA <2.5 ND 197 113 <2.5 43.9 655 183 566.3 7/13/2011 8.8 7.7 4.7 ND NA ND <0.042 140 26 2.6 <0.056 ND 92 84 0.74 21 390 120 210 10/19/2011 12 9 4.3 ND NA ND <0.5 190 29 NA <1 ND 120 91 <0.5 27 380 120 260 7/19/2012 8.6 7.9 5.4 ND NA ND <0.5 200 23 3.5 <1 ND 150 80 <0.5 16 450 110 220.0 2/14/2013 11/11/2014 5/29/2015 4 <0.25 <0.25 <0.5 <0.5 <0.5 <0.25 55.5 9.9 NA 0.29J ND 43.8 25.7 <0.25 6.6 226 26.9 63.9 1/8/2016 41.3 <0.5 6 0.55J <0.5 <0.5 2 248.0 32.6 NA 6 ND 141.0 96.2 <0.5 37.4 489 158.0 381.3 8/31/2017 1 70 70 3,000 3 0.4 70 600 70 25 20 5 6 70 70 600 400 400 500 5,000 6,900 8,500 NE 3,000 400 70,000 84,500 25,000 11,700 20,000 5,000 6,000 30,000 70,000 260,000 28,500 25,000 85,500 ND denotes not detected (Detection limits are unknown for sampling conducted prior to Terracon's involvement with the site.) <- denotes less than method detection limit J indicates estimated value NS denotes not sampled. NA denotes not analyzed. NR denotes not reported. Bold denotes levels above the 2L standard. Bold and gray shading denotes levels above the GCL. Not Sampled-LNAPL Not Sampled Creek Not Sampled Not Sampled-LNAPL Not Sampled-LNAPL Not Sampled Not Sampled 2L Standard (ug/L) GCL (ug/L) WSW-1 Not Sampled Not Sampled 4 of 5 TABLE 3 Summary of Analytical Results Arlington Branco Oil Company Jonesville, North Carolina Terracon Project No. 75217015 NCDEQ Incident No. 30114 Well/Sample I.D. Date Collected (mm/dd/yy) Analytical Method BenzeneDiisopropyl Ether(IPE)Styrenen-ButylbenzeneContaminant of Concern → 6200B Chloromethanesec-ButylbenzeneXylenes (Total)EthylbenzeneIsopropylbenzenep-Isopropyltoluene1,3,5-Trimethylbenzene1,2-Dichloroethane1,2,4-Trimethylbenzenen-PropylbenzeneMethylene ChlorideChloroethaneMethyl tert-butylether (MTBE)NaphthaleneToluene8/3/2006 1.1 ND ND NA NA ND ND ND NA ND ND NA ND ND ND ND 3/20/2007 ND ND ND NA ND ND ND ND ND 1.6J ND NA ND ND ND ND 9/10/2008 <0.5 <0.5 <0.5 NA <0.5 <0.5 <0.5 <0.5 <0.5 <2 <0.5 <0.5 <0.5 <0.5 <0.5 <1.5 11/11/2014 5/29/2015 1/8/2016 8/31/20178/3/2006 ND ND ND NA NA ND ND ND NA ND ND ND ND ND ND ND 3/20/2007 ND ND ND NA ND ND ND ND ND ND ND NA ND ND ND ND 9/10/2008 <0.5 <0.5 <0.5 NA <0.5 <0.5 <0.5 <0.5 <0.5 <2 <0.5 <0.5 <0.5 <0.5 <0.5 <1.5 11/11/2014 5/29/2015 1/8/2016 8/31/2017 1 70 70 3,000 3 0.4 70 600 70 25 20 5 6 70 70 600 400 400 500 5,000 6,900 8,500 NE 3,000 400 70,000 84,500 25,000 11,700 20,000 5,000 6,000 30,000 70,000 260,000 28,500 25,000 85,500ND denotes not detected (Detection limits are unknown for sampling conducted prior to Terracon's involvement with the site.) <- denotes less than method detection limit J indicates estimated value NS denotes not sampled. NA denotes not analyzed. NR denotes not reported. Bold denotes levels above the 2L standard. Bold and gray shading denotes levels above the GCL. GCL (ug/L)2L Standard (ug/L) WSW-7 WSW-6 Not Sampled Not Sampled Not Sampled Not Sampled Not Sampled Not Sampled Not Sampled Not Sampled 5 of 5 APPENDIX A FIELD NOTES AND SITE PHOTOGRAPHS APPENDIX B LABORATORY ANALYTICAL RESULTS AND CHAIN-OF-CUSTODY FORMS ANALYTICAL REPORT March 03, 2023 Terracon - Greensboro, NC Sample Delivery Group:L1590579 Samples Received:03/01/2023 Project Number:75217015 Description:Arlington Branco Oil Company 75217015 Site:75217015 Report To:Chris Driscoll 7327-G, West Friendly Ave Greensboro, NC 27410 Entire Report Reviewed By: March 03, 2023 [Preliminary Report] Heather J Wagner Project Manager Results relate only to the items tested or calibrated and are reported as rounded values. This test report shall not be reproduced, except in full, without written approval of the laboratory. Where applicable, sampling conducted by Pace Analytical National is performed per guidance provided in laboratory standard operating procedures ENV-SOP-MTJL-0067 and ENV-SOP-MTJL-0068. Where sampling conducted by the customer, results relate to the accuracy of the information provided, and as the samples are received. Pace Analytical National 12065 Lebanon Rd Mount Juliet, TN 37122 615-758-5858 800-767-5859 www.pacenational.com 1 Cp 2Tc 3Ss 4Cn 5Sr 6Qc 7Gl 8Al 9Sc ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE: Terracon - Greensboro, NC 75217015 L1590579 03/03/23 16:54 1 of 19 March 03, 2023 Heather J Wagner Project Manager ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE: Terracon - Greensboro, NC 75217015 L1590579 03/03/23 17:26 1 of 19 TABLE OF CONTENTS Cp: Cover Page 1 Tc: Table of Contents 2 Ss: Sample Summary 3 Cn: Case Narrative 4 Sr: Sample Results 5 MW-4 L1590579-01 5 FB-1 L1590579-02 7 Qc: Quality Control Summary 9 Volatile Organic Compounds (GC/MS) by Method 6200B-2011 9 Gl: Glossary of Terms 17 Al: Accreditations & Locations 18 Sc: Sample Chain of Custody 19 1 Cp 2Tc 3Ss 4Cn 5Sr 6Qc 7Gl 8Al 9Sc ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE: Terracon - Greensboro, NC 75217015 L1590579 03/03/23 16:54 2 of 19 ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE: Terracon - Greensboro, NC 75217015 L1590579 03/03/23 17:26 2 of 19 SAMPLE SUMMARY Collected by Collected date/time Received date/time MW-4 L1590579-01 GW Chad H 02/28/23 11:45 03/01/23 09:00 Method Batch Dilution Preparation Analysis Analyst Location date/time date/time Volatile Organic Compounds (GC/MS) by Method 6200B-2011 WG2015759 10 03/03/23 16:01 03/03/23 16:01 JAH Mt. Juliet, TN Collected by Collected date/time Received date/time FB-1 L1590579-02 GW Chad H 02/28/23 15:00 03/01/23 09:00 Method Batch Dilution Preparation Analysis Analyst Location date/time date/time Volatile Organic Compounds (GC/MS) by Method 6200B-2011 WG2015269 1 03/02/23 04:24 03/02/23 04:24 JHH Mt. Juliet, TN Volatile Organic Compounds (GC/MS) by Method 6200B-2011 WG2015759 1 03/03/23 13:57 03/03/23 13:57 JAH Mt. Juliet, TN 1 Cp 2Tc 3Ss 4Cn 5Sr 6Qc 7Gl 8Al 9Sc ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE: Terracon - Greensboro, NC 75217015 L1590579 03/03/23 16:54 3 of 19 ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE: Terracon - Greensboro, NC 75217015 L1590579 03/03/23 17:26 3 of 19 CASE NARRATIVE All sample aliquots were received at the correct temperature, in the proper containers, with the appropriate preservatives, and within method specified holding times, unless qualified or notated within the report. Where applicable, all MDL (LOD) and RDL (LOQ) values reported for environmental samples have been corrected for the dilution factor used in the analysis. All Method and Batch Quality Control are within established criteria except where addressed in this case narrative, a non-conformance form or properly qualified within the sample results. By my digital signature below, I affirm to the best of my knowledge, all problems/anomalies observed by the laboratory as having the potential to affect the quality of the data have been identified by the laboratory, and no information or data have been knowingly withheld that would affect the quality of the data. [Preliminary Report] Heather J Wagner Project Manager 1 Cp 2Tc 3Ss 4Cn 5Sr 6Qc 7Gl 8Al 9Sc ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE: Terracon - Greensboro, NC 75217015 L1590579 03/03/23 16:54 4 of 19 Heather J Wagner Project Manager ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE: Terracon - Greensboro, NC 75217015 L1590579 03/03/23 17:26 4 of 19 SAMPLE RESULTS - 01 L1590579 MW-4 Collected date/time: 02/28/23 11:45 Volatile Organic Compounds (GC/MS) by Method 6200B-2011 Result Qualifier RDL Dilution Analysis Batch Analyte ug/l ug/l date / time Acetone ND 500 10 03/03/2023 16:01 WG2015759 Acrolein ND 500 10 03/03/2023 16:01 WG2015759 Acrylonitrile ND 100 10 03/03/2023 16:01 WG2015759 Benzene ND 10.0 10 03/03/2023 16:01 WG2015759 Bromobenzene ND 10.0 10 03/03/2023 16:01 WG2015759 Bromodichloromethane ND 10.0 10 03/03/2023 16:01 WG2015759 Bromoform ND 10.0 10 03/03/2023 16:01 WG2015759 Bromomethane ND 50.0 10 03/03/2023 16:01 WG2015759 n-Butylbenzene ND 10.0 10 03/03/2023 16:01 WG2015759 sec-Butylbenzene ND 10.0 10 03/03/2023 16:01 WG2015759 tert-Butylbenzene ND 10.0 10 03/03/2023 16:01 WG2015759 Carbon tetrachloride ND 10.0 10 03/03/2023 16:01 WG2015759 Chlorobenzene ND 10.0 10 03/03/2023 16:01 WG2015759 Chlorodibromomethane ND 10.0 10 03/03/2023 16:01 WG2015759 Chloroethane ND 50.0 10 03/03/2023 16:01 WG2015759 Chloroform ND 50.0 10 03/03/2023 16:01 WG2015759 Chloromethane ND 25.0 10 03/03/2023 16:01 WG2015759 2-Chlorotoluene ND 10.0 10 03/03/2023 16:01 WG2015759 4-Chlorotoluene ND 10.0 10 03/03/2023 16:01 WG2015759 1,2-Dibromo-3-Chloropropane ND 50.0 10 03/03/2023 16:01 WG2015759 1,2-Dibromoethane ND 10.0 10 03/03/2023 16:01 WG2015759 Dibromomethane ND 10.0 10 03/03/2023 16:01 WG2015759 1,2-Dichlorobenzene ND 10.0 10 03/03/2023 16:01 WG2015759 1,3-Dichlorobenzene ND 10.0 10 03/03/2023 16:01 WG2015759 1,4-Dichlorobenzene ND 10.0 10 03/03/2023 16:01 WG2015759 Dichlorodifluoromethane ND 50.0 10 03/03/2023 16:01 WG2015759 1,1-Dichloroethane ND 10.0 10 03/03/2023 16:01 WG2015759 1,2-Dichloroethane ND 10.0 10 03/03/2023 16:01 WG2015759 1,1-Dichloroethene ND 10.0 10 03/03/2023 16:01 WG2015759 cis-1,2-Dichloroethene ND 10.0 10 03/03/2023 16:01 WG2015759 trans-1,2-Dichloroethene ND 10.0 10 03/03/2023 16:01 WG2015759 1,2-Dichloropropane ND 10.0 10 03/03/2023 16:01 WG2015759 1,1-Dichloropropene ND 10.0 10 03/03/2023 16:01 WG2015759 1,3-Dichloropropane ND 10.0 10 03/03/2023 16:01 WG2015759 2,2-Dichloropropane ND 10.0 10 03/03/2023 16:01 WG2015759 Di-isopropyl ether ND 10.0 10 03/03/2023 16:01 WG2015759 Ethylbenzene 35.9 10.0 10 03/03/2023 16:01 WG2015759 Hexachloro-1,3-butadiene ND 10.0 10 03/03/2023 16:01 WG2015759 Isopropylbenzene ND 10.0 10 03/03/2023 16:01 WG2015759 p-Isopropyltoluene ND 10.0 10 03/03/2023 16:01 WG2015759 2-Butanone (MEK)ND 100 10 03/03/2023 16:01 WG2015759 Methylene Chloride ND 50.0 10 03/03/2023 16:01 WG2015759 4-Methyl-2-pentanone (MIBK)ND 100 10 03/03/2023 16:01 WG2015759 Methyl tert-butyl ether ND 10.0 10 03/03/2023 16:01 WG2015759 Naphthalene 128 50.0 10 03/03/2023 16:01 WG2015759 n-Propylbenzene ND 10.0 10 03/03/2023 16:01 WG2015759 Styrene ND 10.0 10 03/03/2023 16:01 WG2015759 1,1,1,2-Tetrachloroethane ND 10.0 10 03/03/2023 16:01 WG2015759 1,1,2,2-Tetrachloroethane ND 10.0 10 03/03/2023 16:01 WG2015759 Tetrachloroethene ND 10.0 10 03/03/2023 16:01 WG2015759 Toluene 60.2 10.0 10 03/03/2023 16:01 WG2015759 1,2,3-Trichlorobenzene ND 10.0 10 03/03/2023 16:01 WG2015759 1,2,4-Trichlorobenzene ND 10.0 10 03/03/2023 16:01 WG2015759 1,1,1-Trichloroethane ND 10.0 10 03/03/2023 16:01 WG2015759 1,1,2-Trichloroethane ND 10.0 10 03/03/2023 16:01 WG2015759 Trichloroethene ND 10.0 10 03/03/2023 16:01 WG2015759 1 Cp 2Tc 3Ss 4Cn 5Sr 6Qc 7Gl 8Al 9Sc ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE: Terracon - Greensboro, NC 75217015 L1590579 03/03/23 16:54 5 of 19 ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE: Terracon - Greensboro, NC 75217015 L1590579 03/03/23 17:26 5 of 19 SAMPLE RESULTS - 01 L1590579 MW-4 Collected date/time: 02/28/23 11:45 Volatile Organic Compounds (GC/MS) by Method 6200B-2011 Result Qualifier RDL Dilution Analysis Batch Analyte ug/l ug/l date / time Trichlorofluoromethane ND 50.0 10 03/03/2023 16:01 WG2015759 1,2,3-Trichloropropane ND 25.0 10 03/03/2023 16:01 WG2015759 1,2,4-Trimethylbenzene 119 10.0 10 03/03/2023 16:01 WG2015759 1,3,5-Trimethylbenzene 32.1 10.0 10 03/03/2023 16:01 WG2015759 Vinyl chloride ND 10.0 10 03/03/2023 16:01 WG2015759 o-Xylene 151 10.0 10 03/03/2023 16:01 WG2015759 m&p-Xylenes 234 20.0 10 03/03/2023 16:01 WG2015759 (S) Toluene-d8 109 80.0-120 03/03/2023 16:01 WG2015759 (S) 4-Bromofluorobenzene 114 77.0-126 03/03/2023 16:01 WG2015759 (S) 1,2-Dichloroethane-d4 102 70.0-130 03/03/2023 16:01 WG2015759 1 Cp 2Tc 3Ss 4Cn 5Sr 6Qc 7Gl 8Al 9Sc ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE: Terracon - Greensboro, NC 75217015 L1590579 03/03/23 16:54 6 of 19 ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE: Terracon - Greensboro, NC 75217015 L1590579 03/03/23 17:26 6 of 19 SAMPLE RESULTS - 02 L1590579 FB-1 Collected date/time: 02/28/23 15:00 Volatile Organic Compounds (GC/MS) by Method 6200B-2011 Result Qualifier RDL Dilution Analysis Batch Analyte ug/l ug/l date / time Acetone ND 50.0 1 03/02/2023 04:24 WG2015269 Acrolein ND 50.0 1 03/02/2023 04:24 WG2015269 Acrylonitrile ND 10.0 1 03/02/2023 04:24 WG2015269 Benzene ND 1.00 1 03/02/2023 04:24 WG2015269 Bromobenzene ND 1.00 1 03/02/2023 04:24 WG2015269 Bromodichloromethane ND 1.00 1 03/02/2023 04:24 WG2015269 Bromoform ND 1.00 1 03/02/2023 04:24 WG2015269 Bromomethane ND 5.00 1 03/02/2023 04:24 WG2015269 n-Butylbenzene ND 1.00 1 03/02/2023 04:24 WG2015269 sec-Butylbenzene ND 1.00 1 03/02/2023 04:24 WG2015269 tert-Butylbenzene ND 1.00 1 03/02/2023 04:24 WG2015269 Carbon tetrachloride ND 1.00 1 03/02/2023 04:24 WG2015269 Chlorobenzene ND 1.00 1 03/02/2023 04:24 WG2015269 Chlorodibromomethane ND 1.00 1 03/02/2023 04:24 WG2015269 Chloroethane ND 5.00 1 03/02/2023 04:24 WG2015269 Chloroform ND 5.00 1 03/02/2023 04:24 WG2015269 Chloromethane ND 2.50 1 03/03/2023 13:57 WG2015759 2-Chlorotoluene ND 1.00 1 03/02/2023 04:24 WG2015269 4-Chlorotoluene ND 1.00 1 03/02/2023 04:24 WG2015269 1,2-Dibromo-3-Chloropropane ND 5.00 1 03/02/2023 04:24 WG2015269 1,2-Dibromoethane ND 1.00 1 03/02/2023 04:24 WG2015269 Dibromomethane ND 1.00 1 03/02/2023 04:24 WG2015269 1,2-Dichlorobenzene ND 1.00 1 03/02/2023 04:24 WG2015269 1,3-Dichlorobenzene ND 1.00 1 03/02/2023 04:24 WG2015269 1,4-Dichlorobenzene ND 1.00 1 03/02/2023 04:24 WG2015269 Dichlorodifluoromethane ND J3 5.00 1 03/02/2023 04:24 WG2015269 1,1-Dichloroethane ND 1.00 1 03/02/2023 04:24 WG2015269 1,2-Dichloroethane ND 1.00 1 03/02/2023 04:24 WG2015269 1,1-Dichloroethene ND 1.00 1 03/02/2023 04:24 WG2015269 cis-1,2-Dichloroethene ND 1.00 1 03/02/2023 04:24 WG2015269 trans-1,2-Dichloroethene ND 1.00 1 03/02/2023 04:24 WG2015269 1,2-Dichloropropane ND 1.00 1 03/02/2023 04:24 WG2015269 1,1-Dichloropropene ND 1.00 1 03/02/2023 04:24 WG2015269 1,3-Dichloropropane ND 1.00 1 03/02/2023 04:24 WG2015269 2,2-Dichloropropane ND 1.00 1 03/02/2023 04:24 WG2015269 Di-isopropyl ether ND 1.00 1 03/02/2023 04:24 WG2015269 Ethylbenzene ND 1.00 1 03/02/2023 04:24 WG2015269 Hexachloro-1,3-butadiene ND 1.00 1 03/02/2023 04:24 WG2015269 Isopropylbenzene ND 1.00 1 03/02/2023 04:24 WG2015269 p-Isopropyltoluene ND 1.00 1 03/02/2023 04:24 WG2015269 2-Butanone (MEK)ND 10.0 1 03/02/2023 04:24 WG2015269 Methylene Chloride ND 5.00 1 03/02/2023 04:24 WG2015269 4-Methyl-2-pentanone (MIBK)ND 10.0 1 03/02/2023 04:24 WG2015269 Methyl tert-butyl ether ND 1.00 1 03/02/2023 04:24 WG2015269 Naphthalene ND 5.00 1 03/02/2023 04:24 WG2015269 n-Propylbenzene ND 1.00 1 03/02/2023 04:24 WG2015269 Styrene ND 1.00 1 03/02/2023 04:24 WG2015269 1,1,1,2-Tetrachloroethane ND 1.00 1 03/02/2023 04:24 WG2015269 1,1,2,2-Tetrachloroethane ND 1.00 1 03/02/2023 04:24 WG2015269 Tetrachloroethene ND 1.00 1 03/02/2023 04:24 WG2015269 Toluene ND 1.00 1 03/02/2023 04:24 WG2015269 1,2,3-Trichlorobenzene ND 1.00 1 03/02/2023 04:24 WG2015269 1,2,4-Trichlorobenzene ND 1.00 1 03/02/2023 04:24 WG2015269 1,1,1-Trichloroethane ND 1.00 1 03/02/2023 04:24 WG2015269 1,1,2-Trichloroethane ND 1.00 1 03/02/2023 04:24 WG2015269 Trichloroethene ND 1.00 1 03/02/2023 04:24 WG2015269 1 Cp 2Tc 3Ss 4Cn 5Sr 6Qc 7Gl 8Al 9Sc ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE: Terracon - Greensboro, NC 75217015 L1590579 03/03/23 16:54 7 of 19 ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE: Terracon - Greensboro, NC 75217015 L1590579 03/03/23 17:26 7 of 19 SAMPLE RESULTS - 02 L1590579 FB-1 Collected date/time: 02/28/23 15:00 Volatile Organic Compounds (GC/MS) by Method 6200B-2011 Result Qualifier RDL Dilution Analysis Batch Analyte ug/l ug/l date / time Trichlorofluoromethane ND J3 5.00 1 03/02/2023 04:24 WG2015269 1,2,3-Trichloropropane ND 2.50 1 03/02/2023 04:24 WG2015269 1,2,4-Trimethylbenzene ND 1.00 1 03/02/2023 04:24 WG2015269 1,3,5-Trimethylbenzene ND 1.00 1 03/02/2023 04:24 WG2015269 Vinyl chloride ND 1.00 1 03/02/2023 04:24 WG2015269 o-Xylene ND 1.00 1 03/02/2023 04:24 WG2015269 m&p-Xylenes ND 2.00 1 03/02/2023 04:24 WG2015269 (S) Toluene-d8 111 80.0-120 03/02/2023 04:24 WG2015269 (S) Toluene-d8 112 80.0-120 03/03/2023 13:57 WG2015759 (S) 4-Bromofluorobenzene 105 77.0-126 03/02/2023 04:24 WG2015269 (S) 4-Bromofluorobenzene 111 77.0-126 03/03/2023 13:57 WG2015759 (S) 1,2-Dichloroethane-d4 103 70.0-130 03/02/2023 04:24 WG2015269 (S) 1,2-Dichloroethane-d4 100 70.0-130 03/03/2023 13:57 WG2015759 1 Cp 2Tc 3Ss 4Cn 5Sr 6Qc 7Gl 8Al 9Sc ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE: Terracon - Greensboro, NC 75217015 L1590579 03/03/23 16:54 8 of 19 ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE: Terracon - Greensboro, NC 75217015 L1590579 03/03/23 17:26 8 of 19 QUALITY CONTROL SUMMARYWG2015269 Volatile Organic Compounds (GC/MS) by Method 6200B-2011 L1590579-02 Method Blank (MB) (MB) R3896514-3 03/01/23 22:51 MB Result MB Qualifier MB MDL MB RDL Analyte ug/l ug/l ug/l Acetone U 11.3 50.0 Acrolein U 2.54 50.0 Acrylonitrile U 0.671 10.0 Benzene U 0.0941 1.00 Bromobenzene U 0.118 1.00 Bromodichloromethane U 0.136 1.00 Bromoform U 0.129 1.00 Bromomethane U 0.605 5.00 n-Butylbenzene U 0.157 1.00 sec-Butylbenzene U 0.125 1.00 tert-Butylbenzene U 0.127 1.00 Carbon tetrachloride U 0.128 1.00 Chlorobenzene U 0.116 1.00 Chlorodibromomethane U 0.140 1.00 Chloroethane U 0.192 5.00 Chloroform U 0.111 5.00 2-Chlorotoluene U 0.106 1.00 4-Chlorotoluene U 0.114 1.00 1,2-Dibromo-3-Chloropropane U 0.276 5.00 1,2-Dibromoethane U 0.126 1.00 Dibromomethane U 0.122 1.00 1,2-Dichlorobenzene U 0.107 1.00 1,3-Dichlorobenzene U 0.110 1.00 1,4-Dichlorobenzene U 0.120 1.00 Dichlorodifluoromethane U 0.374 5.00 1,1-Dichloroethane U 0.100 1.00 1,2-Dichloroethane U 0.0819 1.00 1,1-Dichloroethene U 0.188 1.00 cis-1,2-Dichloroethene U 0.126 1.00 trans-1,2-Dichloroethene U 0.149 1.00 1,2-Dichloropropane U 0.149 1.00 1,1-Dichloropropene U 0.142 1.00 1,3-Dichloropropane U 0.110 1.00 2,2-Dichloropropane U 0.161 1.00 Di-isopropyl ether U 0.105 1.00 Ethylbenzene U 0.137 1.00 Hexachloro-1,3-butadiene U 0.337 1.00 Isopropylbenzene U 0.105 1.00 p-Isopropyltoluene U 0.120 1.00 2-Butanone (MEK)U 1.19 10.0 1 Cp 2Tc 3Ss 4Cn 5Sr 6Qc 7Gl 8Al 9Sc ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE: Terracon - Greensboro, NC 75217015 L1590579 03/03/23 16:54 9 of 19 ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE: Terracon - Greensboro, NC 75217015 L1590579 03/03/23 17:26 9 of 19 QUALITY CONTROL SUMMARYWG2015269 Volatile Organic Compounds (GC/MS) by Method 6200B-2011 L1590579-02 Method Blank (MB) (MB) R3896514-3 03/01/23 22:51 MB Result MB Qualifier MB MDL MB RDL Analyte ug/l ug/l ug/l Methylene Chloride U 0.430 5.00 4-Methyl-2-pentanone (MIBK)U 0.478 10.0 Methyl tert-butyl ether U 0.101 1.00 Naphthalene U 1.00 5.00 n-Propylbenzene U 0.0993 1.00 Styrene U 0.118 1.00 1,1,1,2-Tetrachloroethane U 0.147 1.00 1,1,2,2-Tetrachloroethane U 0.133 1.00 Tetrachloroethene U 0.300 1.00 Toluene U 0.278 1.00 1,2,3-Trichlorobenzene U 0.230 1.00 1,2,4-Trichlorobenzene U 0.481 1.00 1,1,1-Trichloroethane U 0.149 1.00 1,1,2-Trichloroethane U 0.158 1.00 Trichloroethene U 0.190 1.00 Trichlorofluoromethane U 0.160 5.00 1,2,3-Trichloropropane U 0.237 2.50 1,2,4-Trimethylbenzene U 0.322 1.00 1,3,5-Trimethylbenzene U 0.104 1.00 Vinyl chloride U 0.234 1.00 o-Xylene U 0.174 1.00 m&p-Xylenes U 0.430 2.00 (S) Toluene-d8 110 80.0-120 (S) 4-Bromofluorobenzene 107 77.0-126 (S) 1,2-Dichloroethane-d4 98.3 70.0-130 Laboratory Control Sample (LCS) • Laboratory Control Sample Duplicate (LCSD) (LCS) R3896514-1 03/01/23 20:08 • (LCSD) R3896514-2 03/01/23 20:29 Spike Amount LCS Result LCSD Result LCS Rec.LCSD Rec.Rec. Limits LCS Qualifier LCSD Qualifier RPD RPD Limits Analyte ug/l ug/l ug/l %%%%% Acetone 25.0 21.1 18.2 84.4 72.8 19.0-160 14.8 27 Acrolein 25.0 20.8 21.2 83.2 84.8 10.0-160 1.90 26 Acrylonitrile 25.0 23.0 19.9 92.0 79.6 55.0-149 14.5 20 Benzene 5.00 5.30 4.69 106 93.8 70.0-123 12.2 20 Bromobenzene 5.00 4.83 4.60 96.6 92.0 73.0-121 4.88 20 Bromodichloromethane 5.00 4.79 4.73 95.8 94.6 75.0-120 1.26 20 Bromoform 5.00 4.95 4.94 99.0 98.8 68.0-132 0.202 20 Bromomethane 5.00 5.76 5.49 115 110 10.0-160 4.80 25 1 Cp 2Tc 3Ss 4Cn 5Sr 6Qc 7Gl 8Al 9Sc ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE: Terracon - Greensboro, NC 75217015 L1590579 03/03/23 16:54 10 of 19 ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE: Terracon - Greensboro, NC 75217015 L1590579 03/03/23 17:26 10 of 19 QUALITY CONTROL SUMMARYWG2015269 Volatile Organic Compounds (GC/MS) by Method 6200B-2011 L1590579-02 Laboratory Control Sample (LCS) • Laboratory Control Sample Duplicate (LCSD) (LCS) R3896514-1 03/01/23 20:08 • (LCSD) R3896514-2 03/01/23 20:29 Spike Amount LCS Result LCSD Result LCS Rec.LCSD Rec.Rec. Limits LCS Qualifier LCSD Qualifier RPD RPD Limits Analyte ug/l ug/l ug/l %%%%% n-Butylbenzene 5.00 4.94 4.43 98.8 88.6 73.0-125 10.9 20 sec-Butylbenzene 5.00 5.09 4.75 102 95.0 75.0-125 6.91 20 tert-Butylbenzene 5.00 5.15 4.73 103 94.6 76.0-124 8.50 20 Carbon tetrachloride 5.00 5.37 4.81 107 96.2 68.0-126 11.0 20 Chlorobenzene 5.00 5.26 5.06 105 101 80.0-121 3.88 20 Chlorodibromomethane 5.00 4.80 4.83 96.0 96.6 77.0-125 0.623 20 Chloroethane 5.00 6.08 5.50 122 110 47.0-150 10.0 20 Chloroform 5.00 5.20 4.67 104 93.4 73.0-120 10.7 20 2-Chlorotoluene 5.00 5.08 4.72 102 94.4 76.0-123 7.35 20 4-Chlorotoluene 5.00 5.11 4.50 102 90.0 75.0-122 12.7 20 1,2-Dibromo-3-Chloropropane 5.00 4.78 4.69 95.6 93.8 58.0-134 1.90 20 1,2-Dibromoethane 5.00 4.96 5.16 99.2 103 80.0-122 3.95 20 Dibromomethane 5.00 4.75 4.61 95.0 92.2 80.0-120 2.99 20 1,2-Dichlorobenzene 5.00 5.05 4.75 101 95.0 79.0-121 6.12 20 1,3-Dichlorobenzene 5.00 4.93 4.80 98.6 96.0 79.0-120 2.67 20 1,4-Dichlorobenzene 5.00 5.04 5.08 101 102 79.0-120 0.791 20 Dichlorodifluoromethane 5.00 5.32 4.14 106 82.8 51.0-149 J3 24.9 20 1,1-Dichloroethane 5.00 5.36 4.65 107 93.0 70.0-126 14.2 20 1,2-Dichloroethane 5.00 4.80 4.64 96.0 92.8 70.0-128 3.39 20 1,1-Dichloroethene 5.00 5.77 4.94 115 98.8 71.0-124 15.5 20 cis-1,2-Dichloroethene 5.00 5.60 4.98 112 99.6 73.0-120 11.7 20 trans-1,2-Dichloroethene 5.00 5.65 5.09 113 102 73.0-120 10.4 20 1,2-Dichloropropane 5.00 4.72 4.54 94.4 90.8 77.0-125 3.89 20 1,1-Dichloropropene 5.00 5.43 4.73 109 94.6 74.0-126 13.8 20 1,3-Dichloropropane 5.00 4.76 4.84 95.2 96.8 80.0-120 1.67 20 2,2-Dichloropropane 5.00 5.36 5.11 107 102 58.0-130 4.78 20 Di-isopropyl ether 5.00 4.39 4.23 87.8 84.6 58.0-138 3.71 20 Ethylbenzene 5.00 5.12 4.79 102 95.8 79.0-123 6.66 20 Hexachloro-1,3-butadiene 5.00 5.52 5.43 110 109 54.0-138 1.64 20 Isopropylbenzene 5.00 5.42 4.88 108 97.6 76.0-127 10.5 20 p-Isopropyltoluene 5.00 5.35 4.96 107 99.2 76.0-125 7.57 20 2-Butanone (MEK)25.0 20.8 19.7 83.2 78.8 44.0-160 5.43 20 Methylene Chloride 5.00 5.27 4.91 105 98.2 67.0-120 7.07 20 4-Methyl-2-pentanone (MIBK)25.0 20.5 21.0 82.0 84.0 68.0-142 2.41 20 Methyl tert-butyl ether 5.00 5.21 4.89 104 97.8 68.0-125 6.34 20 Naphthalene 5.00 3.84 3.94 76.8 78.8 54.0-135 2.57 20 n-Propylbenzene 5.00 4.98 4.60 99.6 92.0 77.0-124 7.93 20 Styrene 5.00 4.99 5.17 99.8 103 73.0-130 3.54 20 1,1,1,2-Tetrachloroethane 5.00 5.14 5.13 103 103 75.0-125 0.195 20 1,1,2,2-Tetrachloroethane 5.00 4.73 4.32 94.6 86.4 65.0-130 9.06 20 1 Cp 2Tc 3Ss 4Cn 5Sr 6Qc 7Gl 8Al 9Sc ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE: Terracon - Greensboro, NC 75217015 L1590579 03/03/23 16:54 11 of 19 ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE: Terracon - Greensboro, NC 75217015 L1590579 03/03/23 17:26 11 of 19 QUALITY CONTROL SUMMARYWG2015269 Volatile Organic Compounds (GC/MS) by Method 6200B-2011 L1590579-02 Laboratory Control Sample (LCS) • Laboratory Control Sample Duplicate (LCSD) (LCS) R3896514-1 03/01/23 20:08 • (LCSD) R3896514-2 03/01/23 20:29 Spike Amount LCS Result LCSD Result LCS Rec.LCSD Rec.Rec. Limits LCS Qualifier LCSD Qualifier RPD RPD Limits Analyte ug/l ug/l ug/l %%%%% Tetrachloroethene 5.00 5.32 4.88 106 97.6 72.0-132 8.63 20 Toluene 5.00 5.41 4.94 108 98.8 79.0-120 9.08 20 1,2,3-Trichlorobenzene 5.00 4.38 4.27 87.6 85.4 50.0-138 2.54 20 1,2,4-Trichlorobenzene 5.00 4.50 4.55 90.0 91.0 57.0-137 1.10 20 1,1,1-Trichloroethane 5.00 5.57 4.64 111 92.8 73.0-124 18.2 20 1,1,2-Trichloroethane 5.00 4.90 4.80 98.0 96.0 80.0-120 2.06 20 Trichloroethene 5.00 5.31 5.05 106 101 78.0-124 5.02 20 Trichlorofluoromethane 5.00 5.68 4.33 114 86.6 59.0-147 J3 27.0 20 1,2,3-Trichloropropane 5.00 5.08 4.82 102 96.4 73.0-130 5.25 20 1,2,4-Trimethylbenzene 5.00 5.11 4.84 102 96.8 76.0-121 5.43 20 1,3,5-Trimethylbenzene 5.00 5.27 4.73 105 94.6 76.0-122 10.8 20 Vinyl chloride 5.00 5.50 4.80 110 96.0 67.0-131 13.6 20 o-Xylene 5.00 5.22 4.94 104 98.8 80.0-122 5.51 20 m&p-Xylenes 10.0 10.6 9.86 106 98.6 80.0-122 7.23 20 (S) Toluene-d8 106 110 80.0-120 (S) 4-Bromofluorobenzene 104 109 77.0-126 (S) 1,2-Dichloroethane-d4 103 99.7 70.0-130 1 Cp 2Tc 3Ss 4Cn 5Sr 6Qc 7Gl 8Al 9Sc ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE: Terracon - Greensboro, NC 75217015 L1590579 03/03/23 16:54 12 of 19 ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE: Terracon - Greensboro, NC 75217015 L1590579 03/03/23 17:26 12 of 19 QUALITY CONTROL SUMMARYWG2015759 Volatile Organic Compounds (GC/MS) by Method 6200B-2011 L1590579-01,02 Method Blank (MB) (MB) R3897146-4 03/03/23 10:38 MB Result MB Qualifier MB MDL MB RDL Analyte ug/l ug/l ug/l Acetone U 11.3 50.0 Acrolein U 2.54 50.0 Acrylonitrile U 0.671 10.0 Benzene U 0.0941 1.00 Bromobenzene U 0.118 1.00 Bromodichloromethane U 0.136 1.00 Bromoform U 0.129 1.00 Bromomethane U 0.605 5.00 n-Butylbenzene U 0.157 1.00 sec-Butylbenzene U 0.125 1.00 tert-Butylbenzene U 0.127 1.00 Carbon tetrachloride U 0.128 1.00 Chlorobenzene U 0.116 1.00 Chlorodibromomethane U 0.140 1.00 Chloroethane U 0.192 5.00 Chloroform U 0.111 5.00 Chloromethane U 0.960 2.50 2-Chlorotoluene U 0.106 1.00 4-Chlorotoluene U 0.114 1.00 1,2-Dibromo-3-Chloropropane U 0.276 5.00 1,2-Dibromoethane U 0.126 1.00 Dibromomethane U 0.122 1.00 1,2-Dichlorobenzene U 0.107 1.00 1,3-Dichlorobenzene U 0.110 1.00 1,4-Dichlorobenzene U 0.120 1.00 Dichlorodifluoromethane U 0.374 5.00 1,1-Dichloroethane U 0.100 1.00 1,2-Dichloroethane U 0.0819 1.00 1,1-Dichloroethene U 0.188 1.00 cis-1,2-Dichloroethene U 0.126 1.00 trans-1,2-Dichloroethene U 0.149 1.00 1,2-Dichloropropane U 0.149 1.00 1,1-Dichloropropene U 0.142 1.00 1,3-Dichloropropane U 0.110 1.00 2,2-Dichloropropane U 0.161 1.00 Di-isopropyl ether U 0.105 1.00 Ethylbenzene U 0.137 1.00 Hexachloro-1,3-butadiene U 0.337 1.00 Isopropylbenzene U 0.105 1.00 p-Isopropyltoluene U 0.120 1.00 1 Cp 2Tc 3Ss 4Cn 5Sr 6Qc 7Gl 8Al 9Sc ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE: Terracon - Greensboro, NC 75217015 L1590579 03/03/23 16:54 13 of 19 ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE: Terracon - Greensboro, NC 75217015 L1590579 03/03/23 17:26 13 of 19 QUALITY CONTROL SUMMARYWG2015759 Volatile Organic Compounds (GC/MS) by Method 6200B-2011 L1590579-01,02 Method Blank (MB) (MB) R3897146-4 03/03/23 10:38 MB Result MB Qualifier MB MDL MB RDL Analyte ug/l ug/l ug/l 2-Butanone (MEK)U 1.19 10.0 Methylene Chloride U 0.430 5.00 4-Methyl-2-pentanone (MIBK)U 0.478 10.0 Methyl tert-butyl ether U 0.101 1.00 Naphthalene U 1.00 5.00 n-Propylbenzene U 0.0993 1.00 Styrene U 0.118 1.00 1,1,1,2-Tetrachloroethane U 0.147 1.00 1,1,2,2-Tetrachloroethane U 0.133 1.00 Tetrachloroethene U 0.300 1.00 Toluene U 0.278 1.00 1,2,3-Trichlorobenzene U 0.230 1.00 1,2,4-Trichlorobenzene U 0.481 1.00 1,1,1-Trichloroethane U 0.149 1.00 1,1,2-Trichloroethane U 0.158 1.00 Trichloroethene U 0.190 1.00 Trichlorofluoromethane U 0.160 5.00 1,2,3-Trichloropropane U 0.237 2.50 1,2,4-Trimethylbenzene U 0.322 1.00 1,3,5-Trimethylbenzene U 0.104 1.00 Vinyl chloride U 0.234 1.00 o-Xylene U 0.174 1.00 m&p-Xylenes U 0.430 2.00 (S) Toluene-d8 109 80.0-120 (S) 4-Bromofluorobenzene 110 77.0-126 (S) 1,2-Dichloroethane-d4 98.3 70.0-130 Laboratory Control Sample (LCS) • Laboratory Control Sample Duplicate (LCSD) (LCS) R3897146-1 03/03/23 08:55 • (LCSD) R3897146-2 03/03/23 09:16 Spike Amount LCS Result LCSD Result LCS Rec.LCSD Rec.Rec. Limits LCS Qualifier LCSD Qualifier RPD RPD Limits Analyte ug/l ug/l ug/l %%%%% Acetone 25.0 24.4 23.8 97.6 95.2 19.0-160 2.49 27 Acrolein 25.0 24.9 24.6 99.6 98.4 10.0-160 1.21 26 Acrylonitrile 25.0 27.0 25.1 108 100 55.0-149 7.29 20 Benzene 5.00 5.48 5.42 110 108 70.0-123 1.10 20 Bromobenzene 5.00 4.67 4.87 93.4 97.4 73.0-121 4.19 20 Bromodichloromethane 5.00 5.44 5.15 109 103 75.0-120 5.48 20 Bromoform 5.00 5.00 5.37 100 107 68.0-132 7.14 20 1 Cp 2Tc 3Ss 4Cn 5Sr 6Qc 7Gl 8Al 9Sc ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE: Terracon - Greensboro, NC 75217015 L1590579 03/03/23 16:54 14 of 19 ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE: Terracon - Greensboro, NC 75217015 L1590579 03/03/23 17:26 14 of 19 QUALITY CONTROL SUMMARYWG2015759 Volatile Organic Compounds (GC/MS) by Method 6200B-2011 L1590579-01,02 Laboratory Control Sample (LCS) • Laboratory Control Sample Duplicate (LCSD) (LCS) R3897146-1 03/03/23 08:55 • (LCSD) R3897146-2 03/03/23 09:16 Spike Amount LCS Result LCSD Result LCS Rec.LCSD Rec.Rec. Limits LCS Qualifier LCSD Qualifier RPD RPD Limits Analyte ug/l ug/l ug/l %%%%% Bromomethane 5.00 4.78 5.19 95.6 104 10.0-160 8.22 25 n-Butylbenzene 5.00 4.81 5.20 96.2 104 73.0-125 7.79 20 sec-Butylbenzene 5.00 5.03 5.15 101 103 75.0-125 2.36 20 tert-Butylbenzene 5.00 4.95 5.07 99.0 101 76.0-124 2.40 20 Carbon tetrachloride 5.00 5.22 5.48 104 110 68.0-126 4.86 20 Chlorobenzene 5.00 5.64 5.56 113 111 80.0-121 1.43 20 Chlorodibromomethane 5.00 5.31 5.45 106 109 77.0-125 2.60 20 Chloroethane 5.00 6.28 6.81 126 136 47.0-150 8.10 20 Chloroform 5.00 5.63 5.30 113 106 73.0-120 6.04 20 Chloromethane 5.00 5.29 5.69 106 114 41.0-142 7.29 20 2-Chlorotoluene 5.00 4.80 4.94 96.0 98.8 76.0-123 2.87 20 4-Chlorotoluene 5.00 4.97 4.97 99.4 99.4 75.0-122 0.000 20 1,2-Dibromo-3-Chloropropane 5.00 4.27 4.32 85.4 86.4 58.0-134 1.16 20 1,2-Dibromoethane 5.00 5.27 5.19 105 104 80.0-122 1.53 20 Dibromomethane 5.00 5.67 5.29 113 106 80.0-120 6.93 20 1,2-Dichlorobenzene 5.00 4.86 5.34 97.2 107 79.0-121 9.41 20 1,3-Dichlorobenzene 5.00 4.92 5.22 98.4 104 79.0-120 5.92 20 1,4-Dichlorobenzene 5.00 4.68 5.15 93.6 103 79.0-120 9.56 20 Dichlorodifluoromethane 5.00 5.14 5.55 103 111 51.0-149 7.67 20 1,1-Dichloroethane 5.00 5.59 5.41 112 108 70.0-126 3.27 20 1,2-Dichloroethane 5.00 5.24 5.19 105 104 70.0-128 0.959 20 1,1-Dichloroethene 5.00 5.04 5.23 101 105 71.0-124 3.70 20 cis-1,2-Dichloroethene 5.00 5.13 5.11 103 102 73.0-120 0.391 20 trans-1,2-Dichloroethene 5.00 5.32 5.32 106 106 73.0-120 0.000 20 1,2-Dichloropropane 5.00 5.65 5.59 113 112 77.0-125 1.07 20 1,1-Dichloropropene 5.00 5.28 5.49 106 110 74.0-126 3.90 20 1,3-Dichloropropane 5.00 5.24 5.39 105 108 80.0-120 2.82 20 2,2-Dichloropropane 5.00 6.04 6.17 121 123 58.0-130 2.13 20 Di-isopropyl ether 5.00 5.57 5.46 111 109 58.0-138 1.99 20 Ethylbenzene 5.00 5.57 5.51 111 110 79.0-123 1.08 20 Hexachloro-1,3-butadiene 5.00 5.22 5.97 104 119 54.0-138 13.4 20 Isopropylbenzene 5.00 5.42 5.54 108 111 76.0-127 2.19 20 p-Isopropyltoluene 5.00 5.08 5.45 102 109 76.0-125 7.03 20 2-Butanone (MEK)25.0 24.8 22.4 99.2 89.6 44.0-160 10.2 20 Methylene Chloride 5.00 5.50 5.33 110 107 67.0-120 3.14 20 4-Methyl-2-pentanone (MIBK)25.0 26.5 26.2 106 105 68.0-142 1.14 20 Methyl tert-butyl ether 5.00 5.42 5.50 108 110 68.0-125 1.47 20 Naphthalene 5.00 4.20 4.41 84.0 88.2 54.0-135 4.88 20 n-Propylbenzene 5.00 4.80 5.08 96.0 102 77.0-124 5.67 20 Styrene 5.00 5.35 5.34 107 107 73.0-130 0.187 20 1 Cp 2Tc 3Ss 4Cn 5Sr 6Qc 7Gl 8Al 9Sc ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE: Terracon - Greensboro, NC 75217015 L1590579 03/03/23 16:54 15 of 19 ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE: Terracon - Greensboro, NC 75217015 L1590579 03/03/23 17:26 15 of 19 QUALITY CONTROL SUMMARYWG2015759 Volatile Organic Compounds (GC/MS) by Method 6200B-2011 L1590579-01,02 Laboratory Control Sample (LCS) • Laboratory Control Sample Duplicate (LCSD) (LCS) R3897146-1 03/03/23 08:55 • (LCSD) R3897146-2 03/03/23 09:16 Spike Amount LCS Result LCSD Result LCS Rec.LCSD Rec.Rec. Limits LCS Qualifier LCSD Qualifier RPD RPD Limits Analyte ug/l ug/l ug/l %%%%% 1,1,1,2-Tetrachloroethane 5.00 5.08 5.25 102 105 75.0-125 3.29 20 1,1,2,2-Tetrachloroethane 5.00 4.69 4.80 93.8 96.0 65.0-130 2.32 20 Tetrachloroethene 5.00 5.33 5.74 107 115 72.0-132 7.41 20 Toluene 5.00 5.47 5.22 109 104 79.0-120 4.68 20 1,2,3-Trichlorobenzene 5.00 4.70 5.73 94.0 115 50.0-138 19.8 20 1,2,4-Trichlorobenzene 5.00 4.97 5.36 99.4 107 57.0-137 7.55 20 1,1,1-Trichloroethane 5.00 5.42 5.60 108 112 73.0-124 3.27 20 1,1,2-Trichloroethane 5.00 4.99 5.15 99.8 103 80.0-120 3.16 20 Trichloroethene 5.00 5.60 5.38 112 108 78.0-124 4.01 20 Trichlorofluoromethane 5.00 5.22 5.54 104 111 59.0-147 5.95 20 1,2,3-Trichloropropane 5.00 4.67 4.83 93.4 96.6 73.0-130 3.37 20 1,2,4-Trimethylbenzene 5.00 4.79 5.29 95.8 106 76.0-121 9.92 20 1,3,5-Trimethylbenzene 5.00 5.02 5.23 100 105 76.0-122 4.10 20 Vinyl chloride 5.00 5.94 6.07 119 121 67.0-131 2.16 20 o-Xylene 5.00 5.43 5.51 109 110 80.0-122 1.46 20 m&p-Xylenes 10.0 11.2 10.9 112 109 80.0-122 2.71 20 (S) Toluene-d8 109 107 80.0-120 (S) 4-Bromofluorobenzene 108 109 77.0-126 (S) 1,2-Dichloroethane-d4 98.4 102 70.0-130 1 Cp 2Tc 3Ss 4Cn 5Sr 6Qc 7Gl 8Al 9Sc ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE: Terracon - Greensboro, NC 75217015 L1590579 03/03/23 16:54 16 of 19 ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE: Terracon - Greensboro, NC 75217015 L1590579 03/03/23 17:26 16 of 19 GLOSSARY OF TERMS Guide to Reading and Understanding Your Laboratory Report The information below is designed to better explain the various terms used in your report of analytical results from the Laboratory. This is not intended as a comprehensive explanation, and if you have additional questions please contact your project representative. Results Disclaimer - Information that may be provided by the customer, and contained within this report, include Permit Limits, Project Name, Sample ID, Sample Matrix, Sample Preservation, Field Blanks, Field Spikes, Field Duplicates, On-Site Data, Sampling Collection Dates/Times, and Sampling Location. Results relate to the accuracy of this information provided, and as the samples are received. Abbreviations and Definitions MDL Method Detection Limit. ND Not detected at the Reporting Limit (or MDL where applicable). RDL Reported Detection Limit. Rec.Recovery. RPD Relative Percent Difference. SDG Sample Delivery Group. (S) Surrogate (Surrogate Standard) - Analytes added to every blank, sample, Laboratory Control Sample/Duplicate and Matrix Spike/Duplicate; used to evaluate analytical efficiency by measuring recovery. Surrogates are not expected to be detected in all environmental media. U Not detected at the Reporting Limit (or MDL where applicable). Analyte The name of the particular compound or analysis performed. Some Analyses and Methods will have multiple analytes reported. Dilution If the sample matrix contains an interfering material, the sample preparation volume or weight values differ from the standard, or if concentrations of analytes in the sample are higher than the highest limit of concentration that the laboratory can accurately report, the sample may be diluted for analysis. If a value different than 1 is used in this field, the result reported has already been corrected for this factor. Limits These are the target % recovery ranges or % difference value that the laboratory has historically determined as normal for the method and analyte being reported. Successful QC Sample analysis will target all analytes recovered or duplicated within these ranges. Qualifier This column provides a letter and/or number designation that corresponds to additional information concerning the result reported. If a Qualifier is present, a definition per Qualifier is provided within the Glossary and Definitions page and potentially a discussion of possible implications of the Qualifier in the Case Narrative if applicable. Result The actual analytical final result (corrected for any sample specific characteristics) reported for your sample. If there was no measurable result returned for a specific analyte, the result in this column may state “ND” (Not Detected) or “BDL” (Below Detectable Levels). The information in the results column should always be accompanied by either an MDL (Method Detection Limit) or RDL (Reporting Detection Limit) that defines the lowest value that the laboratory could detect or report for this analyte. Uncertainty (Radiochemistry)Confidence level of 2 sigma. Case Narrative (Cn) A brief discussion about the included sample results, including a discussion of any non-conformances to protocol observed either at sample receipt by the laboratory from the field or during the analytical process. If present, there will be a section in the Case Narrative to discuss the meaning of any data qualifiers used in the report. Quality Control Summary (Qc) This section of the report includes the results of the laboratory quality control analyses required by procedure or analytical methods to assist in evaluating the validity of the results reported for your samples. These analyses are not being performed on your samples typically, but on laboratory generated material. Sample Chain of Custody (Sc) This is the document created in the field when your samples were initially collected. This is used to verify the time and date of collection, the person collecting the samples, and the analyses that the laboratory is requested to perform. This chain of custody also documents all persons (excluding commercial shippers) that have had control or possession of the samples from the time of collection until delivery to the laboratory for analysis. Sample Results (Sr) This section of your report will provide the results of all testing performed on your samples. These results are provided by sample ID and are separated by the analyses performed on each sample. The header line of each analysis section for each sample will provide the name and method number for the analysis reported. Sample Summary (Ss)This section of the Analytical Report defines the specific analyses performed for each sample ID, including the dates and times of preparation and/or analysis. Qualifier Description J3 The associated batch QC was outside the established quality control range for precision. 1 Cp 2Tc 3Ss 4Cn 5Sr 6Qc 7Gl 8Al 9Sc ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE: Terracon - Greensboro, NC 75217015 L1590579 03/03/23 16:54 17 of 19 ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE: Terracon - Greensboro, NC 75217015 L1590579 03/03/23 17:26 17 of 19 Pace Analytical National 12065 Lebanon Rd Mount Juliet, TN 37122 Alabama 40660 Nebraska NE-OS-15-05 Alaska 17-026 Nevada TN000032021-1 Arizona AZ0612 New Hampshire 2975 Arkansas 88-0469 New Jersey–NELAP TN002 California 2932 New Mexico ¹TN00003 Colorado TN00003 New York 11742 Connecticut PH-0197 North Carolina Env375 Florida E87487 North Carolina ¹DW21704 Georgia NELAP North Carolina ³41 Georgia ¹923 North Dakota R-140 Idaho TN00003 Ohio–VAP CL0069 Illinois 200008 Oklahoma 9915 Indiana C-TN-01 Oregon TN200002 Iowa 364 Pennsylvania 68-02979 Kansas E-10277 Rhode Island LAO00356 Kentucky ¹ ⁶KY90010 South Carolina 84004002 Kentucky ²16 South Dakota n/a Louisiana AI30792 Tennessee ¹ ⁴2006 Louisiana LA018 Texas T104704245-20-18 Maine TN00003 Texas ⁵LAB0152 Maryland 324 Utah TN000032021-11 Massachusetts M-TN003 Vermont VT2006 Michigan 9958 Virginia 110033 Minnesota 047-999-395 Washington C847 Mississippi TN00003 West Virginia 233 Missouri 340 Wisconsin 998093910 Montana CERT0086 Wyoming A2LA A2LA – ISO 17025 1461.01 AIHA-LAP,LLC EMLAP 100789 A2LA – ISO 17025 ⁵1461.02 DOD 1461.01 Canada 1461.01 USDA P330-15-00234 EPA–Crypto TN00003 ACCREDITATIONS & LOCATIONS ¹ Drinking Water ² Underground Storage Tanks ³ Aquatic Toxicity ⁴ Chemical/Microbiological ⁵ Mold ⁶ Wastewater n/a Accreditation not applicable * Not all certifications held by the laboratory are applicable to the results reported in the attached report. * Accreditation is only applicable to the test methods specified on each scope of accreditation held by Pace Analytical. 1 Cp 2Tc 3Ss 4Cn 5Sr 6Qc 7Gl 8Al 9Sc ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE: Terracon - Greensboro, NC 75217015 L1590579 03/03/23 16:54 18 of 19 ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE: Terracon - Greensboro, NC 75217015 L1590579 03/03/23 17:26 18 of 19