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Home My WebLink AboutRA-517_3274_CA_MRP_20200430 April 30, 2020 Mr. Mark Petermann NCDEQ, Division of Waste Management, UST Section 1646 Mail Service Center Raleigh, North Carolina 27699-1646 Reference: Groundwater Monitoring & Modeling Report – Petro Mart # 4 11455 NC Highway 15/501 North Chapel Hill, Chatham County, North Carolina NCDEQ Incident No. TF-3274 NCDEQ Contract No. N17006 ECS Project No. 49:6230-D Dear Mr. Petermann: As authorized by your acceptance of ECS Southeast, LLP (ECS) Task Authorization Request No. 5 dated March 12, 2020, ECS has completed the Groundwater Monitoring and Modeling Report for the above- referenced site. Included in this report is a description of the field activities, the results obtained, and our conclusions and recommendations. ECS appreciates the opportunity to provide our environmental consulting services to you on this project. If you have any questions concerning this report or this project, please contact us. Sincerely, ECS SOUTHEAST, LLP Samantha M. Szakasits, G.I.T. Matthew Gillis Assistant Staff Project Manager Sr. Environmental Project Manager sszakasits@ecslimited.com mgillis@ecslimited.com (919) 861-9832 (919) 861-9845 Joseph P. Nestor, P.G., P.E. Environmental Principal NC License No. 1027 jnestor@ecslimited.com (704) 280-7422 Groundwater Monitoring & Modeling Report – Petro Mart #4 11455 NC Highway 15/501 North Chapel Hill, Chatham County, North Carolina NCDEQ Incident No. TF-3274 NCDEQ Contract No. N17006 ECS Project No. 49:6230-D SITE INFORMATION Facility I.D.: 0-224946 UST Incident No.: TF-3274 Site Rank: H210A Land Use Category: Commercial Site Name and Location: Petro Mart #4 11455 NC Highway 15/501 North Chapel Hill, Chatham County, North Carolina Parcel Identification Number: 9776-23-9124 Latitude and Longitude: 35.846815 North, -79.091187 West Contacts Property Owner: Jean Williams PO Box 429 Carrboro, North Carolina 27510 (919) 929-2645 Property Owner Legal Representative: Benjamin D. Overby 522 South Lexington Ave. Burlington, NC 27216-2958 (336) 227-8851 Consultant: ECS Southeast, LLP 9001 Glenwood Avenue Raleigh, North Carolina 27617 (919) 861-9910 Attn: Matthew Gillis Laboratory: Con-Test Analytical Laboratory 39 Spruce Street East Longmeadow, MA 01028 (413) 525-2332 NC Certification No. 652 Groundwater Monitoring & Modeling Report – Petro Mart #4 11455 NC Highway 15/501 North Chapel Hill, Chatham County, North Carolina NCDEQ Incident No. TF-3274 NCDEQ Contract No. N17006 ECS Project No. 49:6230-D EXECUTIVE SUMMARY The subject site is known as the Petro Mart #4 site and is located at 11455 NC Highway 15/501 North in Chapel Hill, Chatham County, North Carolina. The subject site is further identified by Chatham County Geographic Information Systems (GIS) Parcel Identification Number (PIN) 9776-23-9124. On March 26, 2020, ECS collected a field blank and twelve (12) groundwater samples from monitoring wells MW-1 through MW-12. ECS additionally conducted hydraulic conductivity tests to determine hydraulic properties of the shallow aquifer at monitoring wells MW-3, MW-4, and MW-7. Additionally, ECS spoke with AQUA to inquire information regarding water supply well WSW-1. According the Source Water Assessment Program (SWAP) report, the water supply well is used for residential purposes, installed to a depth of 400 feet, and has a well yield of 103 gallons per minute. A review of the most recent laboratory analytical data provided by Aqua did not report volatile organic compounds (VOCs) at concentrations above the laboratory reporting limits. Based on the results of this assessment, ECS concludes the following:  The inferred groundwater flow direction is generally to the southeast across the site.  Laboratory analysis reported several targeted analytes at concentrations above their respective North Carolina 2L Groundwater Quality Standards (NC2LGWQS), but below their respective Gross Contamination Levels (GCLs) in monitoring wells MW-1 through MW-5 and MW-7 through MW-12. Benzene was reported at a concentration above its GCL in the groundwater sample collected from monitoring well MW-3. The monitoring wells exhibiting the highest concentrations of petroleum- related constituents were collected from monitoring wells MW-3, MW-4, and MW-12 (all three located near to the former UST basins).  Predictive computer modeling using conservative input values indicate that the existing plume of petroleum-related compounds are not expected to be present above laboratory reporting limits or applicable NC2LGWQS more than 300 feet from the “source area” (located near monitoring well MW-3) over a period of 100 years. Therefore, this model demonstrates nearest water supply well (WSW-1), located approximately 380 feet west and upgradient of the site, is not expected to be impacted by this release. Additionally, no water supply wells were identified downgradient of the source area within 1,000 feet of the site. Based on the results and conclusions of this assessment, ECS recommends the following:  Conducting an aggressive fluid and vapor recover (AFVR) event on monitoring well MW-3 in an effort to reduce the concentration of benzene below its GCL and conducting a groundwater sampling event approximately three weeks after the AFVR event to assess its efficiency  If funds are available, ECS recommends conducting remediation such as an injection near monitoring wells MW-3, MW-4, and MW-12 to promote the degradation of petroleum constituents in the site groundwater. Groundwater Monitoring & Modeling Report – Petro Mart #4 11455 NC Highway 15/501 North Chapel Hill, Chatham County, North Carolina NCDEQ Incident No. TF-3274 NCDEQ Contract No. N17006 ECS Project No. 49:6230-D INCIDENT RISK EVALUATION SUMMARY SOURCE INFORMATION Source, Date, and Nature of Release 1 x 2,000-gallon UST (kerosene), 1 x 3,000-gallon UST (diesel), 1 x 6,000-gallon (gasoline), and 2 x 8,000-gallon USTs (gasoline) – removed March 7, 2001 Each Known Source Removed? Yes – 5 USTs removed in March 7, 2001 Additional Sources Likely Present? Yes – current USTs – 1 x 12,000-gallon UST (gasoline), 1 x 8,000-gallon UST (gasoline), and 1 x 6,000-gallon UST (diesel) Known Sources Assessed (USTs, Piping, Dispensers)? Yes FREE PRODUCT Free Product Present? Currently, no. Historically, yes in MW-3 SITE SOIL CONDITIONS TPH Soil Data Available? Maximum concentration at site Unknown Risk-Based Soil Data Available? Yes Maximum Soil Contaminant Concentrations Aliphatics (C9-C12) at 3,080 mg/kg from SS-5B (2018) Current Extent of Soil Impact Delineated? Yes SITE GROUNDWATER CONDITIONS Average Depth to Groundwater? Approx. 30 feet below top of casing (btoc) Contaminants Present Above NC2L? Yes – Monitoring wells MW-1 through MW-4, and MW- 12 Contaminants Present Above GCLs? Yes – Monitoring well MW-3 Groundwater Plume Delineated? Yes Groundwater Plume Migrated Off-Site? No Contaminant Level Trend Stable / Decreasing RECEPTOR INFORMATION Date of Most Current Receptor Survey August 10, 2015 Potable Water-Supply Wells within 1,000’? Yes – see section on water supply well information Water Available to Properties within 1,000’? Yes Non-Potable Wells within 250’? No Site within Wellhead Protection Area? No Surface Water Bodies within 500’? No REMEDIAL ACTIVITIES Remedial activities conducted? O-Sox Remedial Device Deployment and AFVR Events VAPOR INTRUSION Dissolved Contaminants exceeding Groundwater Screening Levels for Vapors present within 5’ of Ground Surface? No Occupied Structures on the Site? Yes, Active Gas Station Groundwater Monitoring & Modeling Report – Petro Mart #4 11455 NC Highway 15/501 North Chapel Hill, Chatham County, North Carolina NCDEQ Incident No. TF-3274 NCDEQ Contract No. N17006 ECS Project No. 49:6230-D TABLE OF CONTENTS 1.0 SITE HISTORY .............................................................................................................................. 1 2.0 SITE GEOLOGY AND HYDROGEOLOGY .......................................................................................... 4 3.0 RECEPTOR INFORMATION ........................................................................................................... 4 4.0 FILE REVIEW ................................................................................................................................ 5 5.0 FIELD ACTIVITIES ......................................................................................................................... 6 6.0 LABORATORY ANALYTICAL RESULTS ............................................................................................ 7 7.0 SLUG TEST FIELD ACTIVITIES ........................................................................................................ 7 8.0 THEORETICAL VERSUS OBSERVED RATES OF GROUNDWATER TRAVEL .......................................... 9 9.0 CONTAMINANT TRANSPORT MODELING .................................................................................... 10 10.0 CONCLUSIONS .......................................................................................................................... 13 11.0 RECOMMENDATIONS ............................................................................................................... 13 FIGURES Figure 1 Site Location Map Figure 2 Aerial Site Map Figure 3 2018 Soil Sample Location Map Figure 4 Water Supply Well Location Map Figure 5 Pantry #294 Site Map Figure 6 Monitoring Well Location Map Figure 7 Groundwater Elevation Map Figure 8 Groundwater Concentration Map Figure 9 Benzene Isoconcentration Map Figure 10 MTBE Isoconcentration Map Figure 11 Fate and Transport Model Summary TABLES Table 1 UST Information Table 2 Summary of Historical Soil Sample Analytical Results Table 3 Water Supply Well Survey Table 4 Geochemical Measurements Calculations Table 5 Monitoring Well Construction and Groundwater Elevation Details Table 6 Summary of Current Groundwater Analytical Results Table 7 Summary of Historical Groundwater Analytical Results APPENDICIES Appendix A Aqua Annual Drinking Water Quality Report Appendix B Site Photographs Appendix C ECS Personnel Field Notes and Sampling Data Sheets Appendix D Laboratory Analytical Data Sheets and Chain of Custody (COC) Record Groundwater Monitoring & Modeling Report – Petro Mart #4 11455 NC Highway 15/501 North Chapel Hill, Chatham County, North Carolina NCDEQ Incident No. TF-3274 NCDEQ Contract No. N17006 ECS Project No. 49:6230-D 1 1.0 SITE HISTORY The Petro Mart #4 site is located at 11455 NC Highway 15/501 North in Chapel Hill, Chatham County, North Carolina (Figures 1 and 2). According to information provided to ECS by the North Carolina Department of Environmental Quality (NCDEQ), the site is an active gasoline station that formerly contained one 2,000-gallon kerosene UST, one 2,000-gallon diesel UST, one 6,000-gallon gasoline UST, and two 8,000-gallon gasoline USTs. The site currently contains one 12,000-gallon gasoline UST, one 8,000-gallon gasoline UST, and one 6,000 gallon diesel UST (Table 1). In August 1986, a release of approximately 25-gallons of gasoline was reported on the site. In October 1986, two monitoring wells (MW-1 and MW-2) were installed at the site to depths of 20 and 30 feet below ground surface (ft. bgs.). Laboratory analysis of soil samples collected from the monitoring well borings did not report petroleum-related contamination. The monitoring wells were determined to be dry and were not sampled. In 1987, laboratory analysis of soil samples collected by the NCDEQ reported benzene at 8.6 milligrams per kilogram (mg/kg) and methyl-ethyl ketone (MEK) at 120 mg/kg; however, the location of these soil borings is not known. In September 1994, groundwater samples were collected from five off-site water supply wells. Laboratory analysis of the groundwater samples reported methyl tert-butyl ether (MTBE) at 72 parts per billion (ppb) in the water supply well at the Park & Stay mobile home park (WSW-2) located approximately 800 feet south of the subject site. Water-supply well WSW-2 has subsequently been abandoned and the Cole Park Plaza Shopping Center has been constructed at that location. In February 1995, two monitoring wells were installed at the site. Monitoring well MW-1 was installed adjacent to the current tank basin and monitoring well MW-2 was installed on the southeast corner of the subject site. Laboratory analysis reported several targeted analytes at concentrations above their respective North Carolina 2L Groundwater Quality Standards (NC2LGWQS) in the groundwater samples collected from monitoring wells MW-1 and MW-2. In March 2001, five USTs were removed from the site. A total of eight soil samples were collected during closure activities. Laboratory analysis of seven of the eight soil samples reported total petroleum hydrocarbons (TPH) above the NCDEQ UST Sections Action Levels of 10 milligrams per kilogram (mg/kg). Monitoring wells MW-1 and MW-2 were abandoned. In December 2008, a receptor survey was conducted for the site. At that time, the site consisted of an active gasoline station (Petro Mart) and one 20,000-gallon compartmentalized UST containing regular and premium gasoline and diesel. ECS could not determine the current status of this UST. The receptor survey did not identify monitoring wells or water supply wells on the subject site. The site was determined to utilize water obtained from water supply well WSW-1 located on an off-site property approximately 350 feet west and upgradient of the site. Water supply well WSW-1 is owned by Aqua who indicated that water supply well WSW-1 is sampled regularly for VOCs. Water supply well WSW-1 is approximately 410 feet deep, has a capacity of 60 gallons per minute (gpm), and has been in service since the late 1970s. Five additional water supply wells (WSW-2, WSW-3, and WSW-5 through WSW-7) Groundwater Monitoring & Modeling Report – Petro Mart #4 11455 NC Highway 15/501 North Chapel Hill, Chatham County, North Carolina NCDEQ Incident No. TF-3274 NCDEQ Contract No. N17006 ECS Project No. 49:6230-D 2 were identified within 1,000 feet of the site. It was reported that these wells are inactive or have been abandoned. In April 2010, a review of the active UST system compliance records for the site was conducted. According to a February 2009 compliance inspection, three new USTs were installed on the site in May 2001 consisting of one 12,000-gallon gasoline, one 8,000-gallon gasoline, and one 6,000-gallon diesel UST. The inspection identified five violations consisting of the following: 1) Failure to provide secondary containment on UST systems installed or replaced after May 1, 2000 near wells and surface waters (the UST system is located within 500 feet of a public water supply well); 2) No leak detection for tanks; 3) Failure to conduct leak detection properly; 4) Failure to report a suspected release (weeps were reportedly observed beneath three of the four dispensing pumps); and, 5) Failure to investigate a suspected release. In the compliance record file, there was a response letter from the property owner (K&M Services, Inc.) regarding to the compliance report. Included in the letter were line and ELD test results, tank tightness testing results, copies of invoices for a continuous statistical leak detection system installed in the existing tank monitoring device, an invoice for seven sensors installed in sump pumps, and dispenser pans, and tank monitoring tapes. In addition, the letter indicates that all weeps beneath the dispensers had been repaired and that old filters had been removed from the containment sump. The 2010 compliance review report concluded that the UST system is in compliance and that residual soil and groundwater contamination may be present in the areas of the former UST pit and dispensing pumps. The report indicates that groundwater contamination beneath the site may be originating from an adjoining leaking UST site (Pantry #294). On April 15 and 16, 2015, ECS installed monitoring wells (MW-1 and MW-2) to depths of 55 and 54 ft. bgs, respectively. Monitoring wells MW-1 and MW-2 are located near the current UST basin. ECS collected two soil samples from each monitoring well boring at depths of 3 to 5 ft bgs (SS-1A and SS-2A) and 8 to 10 ft bgs (SS-1B and SS-2B). Soil samples SS-1A and SS-1B were collected from the boring for monitoring well MW-1 and soil samples SS-2A and SS-2B were collected from the boring for monitoring well MW-2. ECS also collected groundwater samples from monitoring wells MW-1 and MW-2. Laboratory analysis reported methylene chloride at a concentration above its Soil-to-Groundwater Maximum Soil Contamination Concentration (MSCC) in the soil sample collected from SS-2A, as shown on Table 2. Laboratory analysis reported MTBE and lead at concentrations above their respective NC2LGWQS but below their respective GCLs in the groundwater sample collected from monitoring well MW-1. Laboratory analysis reported benzene and MTBE at concentrations above their respective NC2LGWQS but below their respective GCLs in the groundwater sample collected from monitoring well MW-2. On August 10-12, 2015, ECS installed four monitoring wells (MW-3 through MW-6) to depths ranging from 46 to 52 ft. bgs. ECS collected groundwater samples from monitoring wells MW-1 and MW-2 and the four newly installed monitoring wells. On August 24, 2015, Bateman Civil Survey surveyed the site monitoring wells. Laboratory analysis reported benzene and MTBE at concentrations above their respective GCLs in Groundwater Monitoring & Modeling Report – Petro Mart #4 11455 NC Highway 15/501 North Chapel Hill, Chatham County, North Carolina NCDEQ Incident No. TF-3274 NCDEQ Contract No. N17006 ECS Project No. 49:6230-D 3 the groundwater sample collected from monitoring well MW-3, which is located adjacent to the former UST basin. Laboratory analysis reported several additional targeted analytes at concentrations above their respective NC2LGWQS but below their respective GCLs in the groundwater samples collected from monitoring wells MW-1 through MW-6. ECS conducted a receptor survey update for the subject site. ECS observed two water supply well houses (WSW-1 and WSW-6) within 500 feet of the subject site and two water supply wells (WSW-5 and WSW-7) within 1,000 feet of the subject site. ECS spoke with Ms. Shonda, a representative of Aqua who confirmed that the subject site utilizes municipal water obtained from the community water supply well (WSW-1) located approximately 350 feet west and topographically upgradient of the site. Aqua also confirmed that the community water supply well WSW-1 supplies water to the residences within Cedar Terrace. Water supply well WSW-1 is maintained by Aqua who indicated that WSW-1 is sampled regularly for VOCs. ECS spoke with Ms. Jean Williams, the owner of the properties associated with water supply wells WSW-5 through WSW-7, who confirmed that the water supply wells are active and are sampled regularly by an unknown agent. ECS was not provided with laboratory reports from this testing. On March 7, 2018, ECS collected groundwater samples from monitoring wells MW-1, MW-2, MW-4, MW-5, and MW-6. Prior to sampling, ECS gauged each monitoring well for the presence of free product. Free product was detected in monitoring well MW-3, and was therefore not sampled. The samples collected were shipped to Con-Test Analytical Laboratory for analyses for volatile organic compounds (VOCs) by SM 6200B. ECS subsequently deployed an O-Sox remedial device in monitoring well MW-4. Laboratory analysis of the groundwater samples collected from monitoring wells MW-1, MW-2, and MW-4 detected petroleum-related hydrocarbons at concentrations that exceeded their respective North Carolina 2L Groundwater Quality Standards (NC2LGWQS), but did not exceed their respective Gross Contamination Levels (GCLs). The groundwater results show similar concentrations as previous samplings events. In November 2018, ECS contracted with Quantex to advance eight soil borings to collect 24 total soil samples at depths ranging from 12 to 20 ft. bgs for risk-based analysis along the sidewalls of the investigate soil quality in the vicinity of the former UST basin (Table 2 and Figure 3). ECS also installed two groundwater monitoring wells (MW-7 and MW-8), conducted a groundwater monitoring event, and deployed an O-Sox remedial device in monitoring well MW-4. Laboratory analysis detected benzene in monitoring well MW-3 at a concentration above its respective GCL and other petroleum-related compounds were detected in monitoring wells MW-1, MW-2, and MW-4, at concentrations exceeding their respective NC2LGWQS. Laboratory analysis reported several targeted analytes at concentrations above their respective Soil-to-Water MSCCs in several soil samples collected at the site. On February 20, 2019, ECS contracted with Zebra Environmental & Industrial Services (Zebra) to conduct an Aggressive Fluid and Vapor Recovery (AFVR) event at the site using monitoring well MW-3 as an extraction point. On March 6, 2019, ECS collected a field blank and groundwater samples from monitoring wells MW-1 through MW-8. ECS deployed an O-Sox remedial device in monitoring well MW- 3. Laboratory analysis reported benzene at a concentration above its GCL in monitoring well MW-3. Laboratory analysis reported several additional targeted analytes at concentrations above their respective NC2LGWQS but below their respective GCL in the groundwater sample collected from monitoring well MW-3. Laboratory analysis reported several targeted analytes at concentrations above their respective NC2LGWQS but below their respective GCL in the groundwater sample collected from Groundwater Monitoring & Modeling Report – Petro Mart #4 11455 NC Highway 15/501 North Chapel Hill, Chatham County, North Carolina NCDEQ Incident No. TF-3274 NCDEQ Contract No. N17006 ECS Project No. 49:6230-D 4 monitoring well MW-4. On September 24 and 25, 2019, Quantex, on behalf of ECS, installed four groundwater monitoring wells: MW-9 through MW-12. Monitoring wells MW-9 and MW-10 were installed at 5186 Manns Chapel Road south of the subject site and monitor wells MW-11 and MW-12 were installed as deeper wells that are screened 10 to 15 feet deeper than adjacent wells. On October 1, 2019, ECS collected a field blank and groundwater samples from monitoring wells MW-1 through MW-12. ECS additionally contracted with KCI to surveyand tie in the four (4) newly installed monitoring wells to the existing monitoring wells. Laboratory analysis reported benzene at a concentration above its GCL in the groundwater sample collected from monitoring well MW-3 as well as several additional targeted analytes at concentrations above their respective NC2LGWQS. Laboratory analysis reported several targeted analytes at concentrations above their respective NC2LGWQS but below their respective GCL in the groundwater samples collected from monitoring wells MW-1, MW-2, MW-4, and MW-12. 2.0 SITE GEOLOGY AND HYDROGEOLOGY As determined from the USGS Topographic Map, Farrington, North Carolina Quadrangle dated 1993 (Figure 1), the site is at an approximate elevation of 550 feet above mean sea level. The subject site is situated in the Piedmont Physiographic Province. The soils encountered in this area are the residual product of in-place chemical weathering of rock presently underlying the site.. In general, shallow unconfined groundwater movement within the overlying soils is controlled largely by topographic gradients. However, as the groundwater percolates downward, it becomes controlled by the subsurface geologic conditions. Thus, the direction of groundwater movement in the deeper aquifers may not be consistent with the reflecting topography. In general, shallow unconfined groundwater movement within the overlying soils is controlled largely by topographic gradients. Recharge occurs primarily by infiltration along higher elevations and typically discharges into streams or other surface water bodies. The elevation of the shallow water table is transient and can vary with seasonal fluctuations in precipitation. Movement of shallow groundwater is generally from higher to lower elevations. 3.0 RECEPTOR INFORMATION 3.1 Water Supply Wells On August 10, 2015, ECS conducted a receptor survey update for the subject site. ECS observed two water supply well houses (WSW-1 and WSW-6) within 500 feet of the subject site and two water supply wells (WSW- 5 and WSW-7) within 1,000 feet of the subject site (Figure 4). ECS spoke with Ms. Shonda, a representative of Aqua who confirmed that the subject site utilizes municipal water obtained from the community water supply well (WSW-1) located approximately 350 feet west and topographically upgradient of the site. Aqua also confirmed that the community water supply well WSW-1 supplies water to the residences within Cedar Terrace. Water supply well WSW-1 is maintained by Aqua who indicated Groundwater Monitoring & Modeling Report – Petro Mart #4 11455 NC Highway 15/501 North Chapel Hill, Chatham County, North Carolina NCDEQ Incident No. TF-3274 NCDEQ Contract No. N17006 ECS Project No. 49:6230-D 5 that WSW-1 is sampled regularly for VOCs. ECS spoke with Ms. Jean Williams, the owner of the properties associated with water supply wells WSW-5 through WSW-7, who confirmed that the water supply wells are active and are sampled regularly by an unknown company. ECS was not provided with laboratory reports from this testing. During the March 2019 sampling event, it appeared several residences west of the subject site appeared to be vacant and/or abandoned. 3.2 Public Water Supplies ECS contacted Chatham County Public Works Utilities and Water Division to inquire if municipal water is available for the subject site and surrounding area. According to Chatham County personnel and the Chatham County GIS website, municipal water supply lines are located on Manns Chapel Road and NC Highway 15/501 which can supply municipal water to the subject site and surrounding area. The commercial properties located east of the subject site and some residences south and west of the subject site are currently connected to the municipal water supply. 3.3 Surface Water As determined from the USGS Topographic Map, Farrington, North Carolina Quadrangle dated 1993 (Figure 1), the site is at an approximate elevation of 550 feet above mean sea level. Surface runoff on the site is generally to the southeast. 3.4 Subsurface Structures ECS did not identify subsurface structures associated with the subject site. 3.5 Land Use The subject site is developed with a commercial property and currently operates as a convenience store and gasoline station. The surrounding area is a mixture of residential and commercial properties. 3.6 Property Owners and Occupants The Chatham County GIS website was utilized to identify the adjacent property owners. The names and addresses of the owners of adjacent properties and properties located within 500 feet of the site are shown on Table 3. 4.0 FILE REVIEW A separate leaking gasoline UST site, identified as “the Pantry #294” (Incident #22718) (Facility ID #0- 021416) is located across Manns Chapel Road, approximately 270 feet south of the subject site. ECS obtained and reviewed the Withers and Ravenel (WR) May 2013 Groundwater Monitoring Report and found that WR concluded that several VOCs were identified above their respective NC2LGWQS. WR reported, “The most concentrated contaminant area appears to be around MW-3. MW-3 and deep well MW-4 were the only wells with contaminants exceeding 15A NCAC 2L groundwater standards.” Additionally, no target VOCs were detected above their respective GCL. As shown in Figure 5, off-site Groundwater Monitoring & Modeling Report – Petro Mart #4 11455 NC Highway 15/501 North Chapel Hill, Chatham County, North Carolina NCDEQ Incident No. TF-3274 NCDEQ Contract No. N17006 ECS Project No. 49:6230-D 6 monitoring wells MW-3 and deep well MW-4 associated with the Pantry #294 site are located near the eastern portion of the adjacent site. ECS determined that it is unlikely that the current and former USTs located at the Pantry #294 have impacted the subject site based on the inferred easterly flow direction from this site. 5.0 FIELD ACTIVITIES Prior to conducting field activities, ECS spoke with AQUA to inquire information regarding water supply well WSW-1. According the SWAP report, the water supply well is used for residential purposes, installed to a depth of 400 feet, and has a well yield of 103 gallons per minute. A review of the most recent laboratory analytical data provided by Aqua did not report VOCs at concentrations above the laboratory reporting limits. The Annual Drinking Water Quality Report is provided in Appendix A. Groundwater Sampling Activities On March 26, 2020, ECS collected a field blank and twelve (12) groundwater samples from monitoring wells MW-1 through MW-12. The locations of the wells are shown on Figure 6. Site photographs documenting field activities are included in Appendix B. Prior to sampling, the static groundwater elevation was measured in each monitoring well using a decontaminated water level meter. A summary of monitoring well construction details and groundwater elevation data are included on Table 4. Based on the groundwater elevations, groundwater flow was determined to be generally to the southeast as shown on Figure 7. A 2013 potentiometric flow map for the adjacent Pantry #294 site (Figure 5) depicts groundwater flow northeast. Prior to beginning groundwater sampling activities, ECS collected a field blank by pouring DI water over the water level meter probe and into the laboratory prepared sample containers. Purging and sampling were accomplished using a dedicated disposable bailer and nylon string. During purging, ECS collected geochemical measurements from the monitoring wells for each well volume purged using an YSI-556 multi-parameter meter. The geochemical measurements were recorded and shown in Table 5 as well as the monitoring well sampling forms provided in Appendix C. Immediately after collection, the groundwater samples were transferred into sample containers provided by the laboratory. The sample containers were labeled with ECS project number, sample identification, sample date and time, and requested analytical analysis. The containers were placed into protective packaging material and placed into a cooler with ice to maintain the samples at approximately 4 Celsius (C). The samples were submitted to Con-Test Analytical Laboratory, a North Carolina certified laboratory located in East Longmeadow, Massachusetts for chemical analysis for VOCs using Standard Method 6200B. ECS maintained proper chain of custody (COC) procedures throughout the sample collection and transportation process. The laboratory analytical data and the COC are included in Appendix D. Groundwater Monitoring & Modeling Report – Petro Mart #4 11455 NC Highway 15/501 North Chapel Hill, Chatham County, North Carolina NCDEQ Incident No. TF-3274 NCDEQ Contract No. N17006 ECS Project No. 49:6230-D 7 6.0 LABORATORY ANALYTICAL RESULTS Groundwater Analytical Results Laboratory analysis reported benzene (48,000 micrograms/liter [µg/L]) at a concentration above its GCL and NC2LGWQS in the groundwater samples collected from monitoring wells MW-3. Laboratory analysis reported one or more targeted analytes at concentrations above their respective NC2LGWQS but below their respective GCL in the groundwater samples collected from monitoring wells MW-1, MW-2, MW-3, MW-4, MW-7, MW-9, and MW-12. Laboratory analysis reported several additional targeted analytes at concentrations above their respective laboratory reporting limits below their respective NC2LGWQS in the groundwater samples collected from monitoring wells MW-1 through MW-5 and MW-7 through MW-12. Laboratory analysis did not report targeted analytes at concentrations above their respective laboratory reporting limits in the field blank or the groundwater sample collected from monitoring well MW-6. A summary of the current groundwater laboratory analytical results is included in Table 6 and depicted on Figure 8. Historical analytical data from groundwater assessment is included in Table 7. The laboratory data sheets and COC are included in Appendix D. Using the laboratory analytical results of the groundwater samples collected from the groundwater monitoring wells, isoconcentration maps depicting the horizontal extent for benzene and MTBE are included in Figures 9 and 10. 7.0 SLUG TEST FIELD ACTIVITIES On March 26, 2020, ECS personnel mobilized to the site to conduct hydraulic conductivity tests (i.e., slug tests) to determine hydraulic properties of the shallow aquifer at monitoring wells MW-3, MW-4, and MW-7. The slug test procedure is summarized below: 1. Measure the static water level in the well from the top of the casing using a decontaminated electronic water level meter. 2. Instantaneously insert the decontaminated slug to displace the groundwater in the respective monitoring well. Adding the cylinder causes an abrupt rise of water-level, and rapid removal of the cylinder causes an abrupt drop in water-level in the well. The “slug” is a solid PVC cylinder and is constructed of PVC tubing capped at each end and filled with sand for ballast. 3. The "slug" is introduced suddenly raising he water-level) and a series of water-level versus time measurements are made as the water-level changes toward an equilibrium situation. The measurements are collected automatically by a transducer and data-logger, usually at preprogrammed time intervals of every 10 to 30 seconds for the first 7 minutes; finishing with readings at intervals of 1 minute for 10 minutes followed by readings every 5 minutes for the last 30 minutes of the test. 4. Instantaneously remove the slug to replace the groundwater in the respective monitoring well and measuring the rising head at similar time intervals. Groundwater Monitoring & Modeling Report – Petro Mart #4 11455 NC Highway 15/501 North Chapel Hill, Chatham County, North Carolina NCDEQ Incident No. TF-3274 NCDEQ Contract No. N17006 ECS Project No. 49:6230-D 8 7.1 Slug Test Results ECS used a commercially available software program (AQTESOLV) to evaluate slug test data. The Bower-Rice Method was used to determine the hydraulic conductivity from the data collected. In the Bower-Rice Method, the ratio H/Hi is plotted versus the elapsed time (t) on a logarithmic scale where H is the drawdown at time t and Hi is the initial drawdown. The time T0 is determined from the plot as the time when H/Hi equals 0.02. ECS matched curves in the AQTESOLV program in the 20 to 30 percent range of the normalized head data to account the double straight line effect caused by rapid filter pack drainage in the initial stage of each test. The hydraulic conductivity (K) is calculated from the following equation: K r L R LT 2 02 ln where:  r is the radius of the well casing,  R is the radius of the sand pack, and  L is the length of the well screen or water column if the water is below the top of the screen. The hydraulic conductivity (K) was used to calculate the average linear groundwater velocity (v) using the following equation: v K dh dle  where:  e is the effective porosity, and  dh dl is the horizontal gradient. The test data provided strong correlation of H/Hi when plotted against time for the rising head test procedures in monitoring wells MW-3, MW-4, and MW-7. The corresponding test result plots for the three monitoring wells are included on Figure 11. The calculated hydraulic conductivity (K) rates of the in-situ soils at monitoring wells MW-3, MW-4, and MW-7 were approximately 0.1473 feet per day, 7.026 feet per day, and 0.3677 feet per day, respectively. These values were then averaged for a calculated average hydraulic conductivity of 2.51 feet per day. An estimated effective porosity of 35% was assumed based on the well logs for the site, which indicated sandy silty soils. The assumed silt porosity values found in USGS Water Supply Paper Hydrology Paper 2220 (Heath, Tenth Printing, 2004), were used in the groundwater velocity (v) calculation. Groundwater Monitoring & Modeling Report – Petro Mart #4 11455 NC Highway 15/501 North Chapel Hill, Chatham County, North Carolina NCDEQ Incident No. TF-3274 NCDEQ Contract No. N17006 ECS Project No. 49:6230-D 9 8.0 THEORETICAL VERSUS OBSERVED RATES OF GROUNDWATER TRAVEL Based on water table elevations measurements on March 26, 2020, the groundwater at the site was determined to be flowing generally to the southeast (Figure 7). 8.1 Rate Based on Rising Head Test Based on the groundwater gradient measured between monitoring wells MW-2 and MW-8 of 0.0039 feet per foot, a calculated average hydraulic conductivity of 2.51 feet/day from the slug tests conducted in monitoring wells MW-3, MW-4, and MW-7, and an assumed porosity of 35 percent for silt, the average rate of groundwater flow is estimated to be 10.2 feet per year, assuming 365 days comprise a year. This rate assumes homogenous and isotropic conditions, and that preferred pathways for transport such as fractures, foliations or dikes are not present. The field data and calculations are included on Figure 11. 8.2 Effects of Diffusion, Dispersion, and Retardation on Rate of Contaminant Movement The rate of movement of a solute (contaminant) in groundwater is not only controlled by the groundwater velocity (advective transport), but also by diffusion, mechanical dispersion, and retardation effects. Diffusion is the movement of a contaminant from areas of high concentration to areas of lower concentration. Mechanical dispersion is the mixing of the contaminated groundwater with clean water, resulting in dilution of the contaminant at the leading edge of the plume. Combined, these two processes define a parameter called hydrodynamic dispersion. Studies have shown that hydrodynamic dispersion is an important factor in the movement of contaminants where groundwater velocities are low. As the initial concentrations of contaminants increase, the effects of hydrodynamic dispersion may cause the plume front to reach some point downgradient sooner than expected had only groundwater velocity been considered. At field scales, longitudinal dispersivity may be estimated to be about one tenth of the flow length of the plume (Fetter, 1993). As contaminants travel through the aquifer, they may be adsorbed onto solid soil particles, absorbed by porous silts and clays, partitioned onto organic carbon, and undergo various chemical reactions. As a result, many contaminants may move more slowly than the groundwater which transports them; this process termed retardation. Biodegradation, dispersion, and mixing may decrease the concentration of solute in the plume, but may not slow the rate of advance of plume movement. The ratio of the groundwater velocity to the velocity of contaminant transport is defined as the retardation factor (R). For benzene, R is estimated to be 1.2 based on soil bulk density (rho), partition coefficient (Koc), and fraction organic carbon (foc). Newell and McCloud (1996) suggest retardation factors between 1 and 2 for benzene. A value of 1 for the retardation factor is conservative (i.e., contaminant moves at same rate as groundwater). The observed reduction in the concentrations of benzene as you move downgradient of the source area will cause a reduction (namely biodegradation, dispersion, and mixing) as well as diffusion. Groundwater Monitoring & Modeling Report – Petro Mart #4 11455 NC Highway 15/501 North Chapel Hill, Chatham County, North Carolina NCDEQ Incident No. TF-3274 NCDEQ Contract No. N17006 ECS Project No. 49:6230-D 10 8.3 Rate Based on Observed Conditions The benzene concentration associated with monitoring well MW-3 in March 2019 was 28,000 ug/L. The benzene concentration associated with monitoring well MW-3 increased to 48,000 ug/L between March 2019 and March 2020. This increase is potentially due to the soil contamination present at the site leaching into the groundwater; however, it was previously determined that excavation of impacted soil was not feasible to the proximity the onsite building and North Carolina Department of Transportation (NCDOT) Right-of-Way. 9.0 CONTAMINANT TRANSPORT MODELING 9.1 Empirical Modeling The observed groundwater flow data in the silt suggest an average groundwater flow velocity of 10.2 feet/year. With the assumption of a retardation factor of 1.2 for benzene, a comparative rate of flow on the order of 8.5 feet/year can be estimated for the bulk mass of the plume. Assuming no biological decay or attenuation, this suggests the benzene plume may reach the water supply well WSW-1 (380 feet west) in approximately 44.7 years if groundwater flow was towards that well. The inferred groundwater flow across the site is towards the southeast and away from WSW-1. 9.2 Solute Transport Modeling The objective of this modeling effort was to evaluate the maximum future extent and fate of benzene in the groundwater at the Petro Mart #4 site. Benzene was selected as the simulated compounds because of this presence in groundwater above the respective NC2LGWQS. The Air Force Center for Environmental Excellence (AFCEE) BIOSCREEN Natural Attenuation model was used to assess the fate and transport of dissolved benzene. This solute transport model simulates the processes of advection, dispersion, retardation, and degradation of dissolved constituents in groundwater. Conservative model assumptions and parameter values were used to provide maximum estimates of the horizontal downgradient migration distance for the constituents. Observed values of groundwater velocity, moderate retardation, and half-life parameters, and the highest benzene concentrations detected were used in order to estimate the maximum downgradient migration distance from the source area. 9.3 Conceptual Model Groundwater flow and solute transport modeling require an understanding of site specific hydrogeology, constituent transport, and reaction processes, and source area information, which are formulated into a conceptual model. A conceptual model for the Petro Mart #4 site requires the identification of the following elements of the aquifer system: hydrostratigraphy, rates and directions of groundwater flow, hydraulic properties, and source release information and constituent distribution. These characteristics are incorporated into the natural attention model to make predictions of constituent concentrations at various times at downgradient points. Groundwater Monitoring & Modeling Report – Petro Mart #4 11455 NC Highway 15/501 North Chapel Hill, Chatham County, North Carolina NCDEQ Incident No. TF-3274 NCDEQ Contract No. N17006 ECS Project No. 49:6230-D 11 Field data indicate that a medium permeability, water-table aquifer is present beneath the site. Lithologic information collected during well drilling indicates that the water-table aquifer consists of predominantly silty sand and silt. A saturated thickness of approximately 20 feet was assumed for modeling purposes. Static water level data obtained by ECS on March 26, 2020, was used to estimate groundwater flow direction. The flow direction was determined to be generally to the southeast. The average hydraulic gradient was determined to be 0.0039 feet/foot as calculated between monitoring wells MW-2 and MW-8. The average hydraulic conductivity data obtained from the rising head tests conducted in monitoring wells MW-3, MW-4, and MW-7 on March 26, 2020, indicates that the water table aquifer has an average hydraulic conductivity of 2.51 feet/day (8.85x10-4 cm/sec). Using an average gradient of 0.0038 feet/foot and an assumed porosity of 35 percent in the water table aquifer, and isotropic/homogeneous conditions, an average theoretical rate of groundwater flow in the aquifer can be estimated to be on the order of 10.2 feet/year. 9.4 Model Description and Assumptions The two-dimensional analytical solute transport model BIOSCREEN was used to simulate natural attenuation of dissolved benzene in groundwater at the site. Contaminant transport is simulated under one-dimensional horizontal groundwater flow in BIOSCREEN. The BIOSCREEN Natural Attenuation software is based on the Domenico (1987) three-dimensional analytical solute transport model. The original model assumes a fully-penetrating vertical plane source oriented perpendicular to groundwater flow, to simulate the release of contaminants to moving groundwater. In addition, the Domenico solution accounts for the effects of advective transport, three-dimensional dispersion, adsorption, and first-order decay. In BIOSCREEN, the Domenico solution has been adapted to provide three different model types representing i) transport with no decay, ii) transport with first-order decay, and iii) transport with “instantaneous” biodegradation reaction. 9.5 Model Parameters Site-specific model parameter values were used whenever possible. Conservative values from literature were used when site-specific data were not available. The source release of benzene for the model was chosen to be monitoring well MW-3 because it is the most centrally located monitoring well near of the UST basin and presents the highest benzene concentration. The model simulation was run for a 100- year time frame. The modeled reduction of benzene concentration was compared to observed concentrations from monitoring wells along the modeled plume flow path. Field data from recent site groundwater sampling of the site monitoring wells were included. Groundwater advection is the main mechanism that causes downgradient migration of dissolved constituents. As discussed above, a value of 8.85x10-4 cm/sec was used for the water table aquifer hydraulic conductivity based on observed field conditions, and a value of 0.0038 feet/foot was calculated as the horizontal hydraulic gradient. A saturated thickness of 20 feet was estimated at the site. ECS recognizes the apparent mixing of metric and English units; however, the units of the individual model input parameters are set by the model. Groundwater Monitoring & Modeling Report – Petro Mart #4 11455 NC Highway 15/501 North Chapel Hill, Chatham County, North Carolina NCDEQ Incident No. TF-3274 NCDEQ Contract No. N17006 ECS Project No. 49:6230-D 12 Adsorption of constituents onto aquifer materials, or simply dissolution, can cause the constituent plume center of mass to migrate at a fraction of the rate that groundwater moves. The modeling analysis used estimated values of 35 percent porosity (Heath, 1983 and 2004), 1.7 kilograms per liter for the aquifer soil bulk mass density, a Koc of 95 L/kg, and a foc of 1.0-E3 for benzene. An estimated retardation factor of 1.2 was used in the model. The area modeled length was 500 feet by 500 feet in width. Dispersion is an important physical process which influences the transport of dissolved constituents. For plume migration distances which are less than 1,000 feet, the longitudinal dispersivity can be estimated as one tenth the mean travel distance of the plume (Pickens and Grisak, 1981). For this site, the longitudinal dispersivity was conservatively assumed to be 10 feet, which is approximately one tenth the observed mean travel distance. The horizontal and vertical transverse dispersivity values were estimated to be one tenth and one hundredth the longitudinal dispersivity value, respectively (de Marsily, 1986). Higher transverse dispersivity values cause contaminants to disperse even farther downgradient and, therefore, conservatively overestimate the calculated migration distance. Degradation processes also affect the transport of dissolved constituents. Degradation is a general term which includes the effects of biodegradation, oxidation-reduction, and hydrolysis. Other physical processes such as volatilization and recharge dilution could also be considered degradation processes. In this model, each of these processes are lumped into one degradation rate constant. Benzene is an organic compound which is affected by degradation processes. A degradation half-life for benzene was estimated to be 1.97 years. 9.6 Model Results In this model, benzene is continuously released from the source area (monitoring well MW-3) and is simulated until it has naturally attenuated below its NC2LGWQS. Graphs of benzene concentrations over time with the nearest receptor point of the water supply well WSW-1 located approximately 380 feet west and, additionally, upgradient from the source are shown in Figure 4 and Figure 11. This plot shows that with no degradation, benzene will migrate more than 500 feet downgradient from the source area at concentrations above its detection limit in 100 years. The plots show that with first order decay, benzene will migrate no more than 300 feet downgradient from the source at concentration levels at concentrations above its detection limit. Instantaneous reaction shows that benzene will migrate no more than 450 feet downgradient from the source at concentration levels at concentrations above its detection limit. The modeling indicates that benzene will degrade in the groundwater before reaching the water supply wells presently identified within 1,000 feet of the site. 9.7 Model Summary The results of the groundwater flow and solute transport modeling effort indicate that the maximum distance from the source area where benzene will be above the NC2LGWQS of 1 ppm with minimal attenuation is no more than 300 feet downgradient of monitoring well MW-3 in 100 years, as shown on Figure 11. The closest active, potable water supply well (WSW-1), however, is located approximately 380 feet west and upgradient from the “source area”. Additionally, no water supply wells were identified downgradient (southeast) of the source area with 1,000 feet of the site. Groundwater Monitoring & Modeling Report – Petro Mart #4 11455 NC Highway 15/501 North Chapel Hill, Chatham County, North Carolina NCDEQ Incident No. TF-3274 NCDEQ Contract No. N17006 ECS Project No. 49:6230-D 13 10.0 CONCLUSIONS The inferred groundwater flow direction is generally to the southeast across the site. Laboratory analysis reported several targeted analytes at concentrations above their respective NC2LGWQS, but below their respective GCLs in monitoring wells MW-1 through MW-5 and MW-7 through MW-12. Benzene was reported at a concentration above its GCL in the groundwater sample collected from monitoring well MW-3. The monitoring wells exhibiting the highest concentrations of petroleum-related constituents were collected from monitoring wells MW-3, MW-4, and MW-12 (all three located near to the former UST basins). Predictive computer modeling using conservative input values indicate that the existing plume of petroleum-related compounds are not expected to be present above laboratory reporting limits or applicable NC2LGWQS more than 300 feet from the “source area” (located near monitoring well MW-3) over a period of 100 years. Therefore, this model demonstrates nearest water supply well (WSW-1), located approximately 380 feet west and upgradient of the site, is not expected to be impacted by this release. Additionally, no water supply wells were identified downgradient of the source area within 1,000 feet of the site. 11.0 RECOMMENDATIONS Based on the findings of this assessment, ECS recommends the following: Conducting an AFVR event on monitoring well MW-3 in an effort to reduce the concentration of benzene below its GCL and conducting a groundwater sampling event approximately three weeks after the AFVR event to assess its efficiency. If funds are available, ECS recommends conducting remediation such as an injection near monitoring wells MW-3, MW-4, and MW-12 to promote the degradation of petroleum constituents in the site groundwater. FIGURES SOURCE: USGS TOPOGRAPHIC MAPFARRINGTONNC QUADRANGLEDATED 1993 SCALE: 1 : 24,000 FIGURE 1SITE LOCATION MAP PETRO MART #411455 NC HWY 15/501 NORTHCHAPEL HILL, CHATHAM COUNTY, NORTH CAROLINANCDEQ INCIDENT NO. TF-3274ECS PROJECT NO. 49:6230-D SITE FIGURE 2 AERIAL SITE MAP PETRO MART #4 11455 NC HIGHWAY 15/501 NORTH CHAPEL HILL, CHATHAM COUNTY, NORTH CAROLINA NCDEQ INCIDENT NO. TF-3274 ECS PROJECT NO. 49:6230-D SOURCE: CHATHAM COUNTY GISDATED 2013 SCALE AS SHOWN Scale: 1 inch = 170 feet SITE COMMERCIAL SINGLE-FAMILY RESIDENCES SINGLE-FAMILY RESIDENCES THE PANTRY #294 SOURCE: CHATHAM COUNTY GISDATED 2017 SCALE AS SHOWN FIGURE 3 2018 SOIL SAMPLE LOCATION MAP PETRO MART #4 11455 NC HIGHWAY 15/501 NORTH CHAPEL HILL, CHATHAM COUNTY, NORTH CAROLINA NCDEQ INCIDENT NO. TF-3274 ECS PROJECT NO. 49:6230-D Scale: 1 inch = 60 feet MW-1 MW-2 MW-5MW-6 MW-3 MW-4 MW-7 MW-8 MW-6 MW-5 MW-8 MW-7 MW-4 MW-1 MW-2 MW-3 SS-1SS-2 SS-11SS-10 SS-8SS-9 SS-3SS-4SS-5 SS-7 SS-6 SS-12 LEGEND Approximate Location of Monitoring Well Approximate Location of Soil Sample Boring Approximate Location of Former USTs Approximate Location of Current USTs MW-1 SS-1 SOURCE: CHATHAM COUNTY GISDATED 2017 SCALE AS SHOWN FIGURE 4 WATER SUPPLY WELL LOCATION MAP PETRO MART #4 11455 NC HIGHWAY 15/501 NORTH CHAPEL HILL, CHATHAM COUNTY, NORTH CAROLINA NCDEQ INCIDENT NO. TF-3274 ECS PROJECT NO. 49:6230-D Scale: 1 inch = 400 feet LEGEND Approximate Location of Active Water Supply Well Approximate Location of Inactive Water Supply Well Approximate Location of Fire Hydrant WSW-1 500 ft. Radius 1,000 ft. Radius SITE WSW-1 WSW-6 WSW-7 WSW-5 WSW-5 FIGURE 5 PANTRY #294 SITE MAP PETRO MART #4 11455 NC HIGHWAY 15/501 NORTH CHAPEL HILL, CHATHAM COUNTY, NORTH CAROLINA NCDEQ INCIDENT NO. TF-3274 ECS PROJECT NO. 49:6230-D SOURCE: Withers and Ravenel (WR) May 2013 Groundwater Monitoring Report SCALE AS SHOWN SITE COMMERCIAL SINGLE-FAMILY RESIDENCES THE PANTRY 294 MW-3 MW-4 SOURCE: CHATHAM COUNTY GISDATED 2013 SCALE AS SHOWN FIGURE 6 MONITORING WELL LOCATION MAP PETRO MART #4 11455 NC HIGHWAY 15/501 NORTH CHAPEL HILL, CHATHAM COUNTY, NORTH CAROLINA NCDEQ INCIDENT NO. TF-3274 ECS PROJECT NO. 49:6230-D Scale: 1 inch = 80 feet MW-1 MW-2 LEGEND Approximate Location of Monitoring Well Approximate Location of Former USTs Approximate Location of Current USTs MW-1 MW-5MW-6 MW-3 MW-4 MW-7 MW-8 MW-11 MW-12 MW-9MW-10 SOURCE: CHATHAM COUNTY GISDATED 2013 SCALE AS SHOWN FIGURE 7 GROUNDWATER ELEVATION MAP PETRO MART #4 11455 NC HIGHWAY 15/501 NORTH CHAPEL HILL, CHATHAM COUNTY, NORTH CAROLINA NCDEQ INCIDENT NO. TF-3274 ECS PROJECT NO. 49:6230-D Scale: 1 inch = 80 feet LEGEND Approximate Location of Monitoring Well Groundwater Elevation Groundwater Contour Line Estimated Direction of Groundwater Flow NOTES:1.) Deep Monitoring Wells MW-11 and MW-12 were not used to determine groundwater flow direction. MW-1 520.85 MW-6 521.47 MW-1 520.85 MW-11* 521.33 MW-12* 521.40 MW-10 521.72 MW-7 521.73 MW-8 522.25 MW-9 521.12 MW-4 521.47 MW-5 520.91 MW-2 521.24 Approximate Location of Current USTs Approximate Location of Former USTs MW-3 521.64 SOURCE: CHATHAM COUNTY GISDATED 2013 SCALE AS SHOWN FIGURE 8 GROUNDWATER CONCENTRATION MAP PETRO MART #4 11455 NC HIGHWAY 15/501 NORTH CHAPEL HILL, CHATHAM COUNTY, NORTH CAROLINA NCDEQ INCIDENT NO. TF-3274 ECS PROJECT NO. 49:6230-D Scale: 1 inch = 80 feet MW-6 BRL MW-1 Acetone 5.2 J Methyl tert-Butyl Ether 40 LEGEND Approximate Location of Monitoring Well 3.3 Concentrations Above Laboratory Reporting Limits (µg/L) 55,000 Bold Concentrations Above NC2LGWQS (µg/L) 48,000 Bold Underlined Concentrations Above GCL (µg/L) BRL Below Reporting Limit J Estimated Concentration MW-1 MW-2 Diisopropyl Ether 6.6 Methyl tert-Butyl Ether 100 MW-10 Chloroform 7.0 MW-9 Acetone 6.5 J Methyl tert-Butyl Ether 21 MW-11 Methyl tert-Butyl Ether 5.1 MW-8 Methyl tert-Butyl Ether 4.5 MW-3 Benzene 48,000 Toluene 55,000 Ethylbenzene 4,100 Total Xylenes 21,500 Acetone 5,100 J 2-Butanone 2,000 J n-Butylbenzene 240 J Diisopropyl Ether 200 J Isopropylbenzene 700 J Methyl tert-Butyl Ether 4,800 Naphthalene 2,800 n-Propylbenzene 820 1,2,4-Trimethylbenzene 3,700 1,3,5-Trimethylbenzene 1,300 MW-4 Benzene 1,500 Toluene 49 Ethylbenzene 120 Total Xylenes 450 Acetone 24 J n-Butylbenzene 3.3 Diisopropyl Ether 65 Isopropylbenzene 10 Methyl tert-Butyl Ether 590 Naphthalene 28 n-Propylbenzene 12 1,2,4-Trimethylbenzene 67 1,3,5-Trimethylbenzene 35 MW-12 Benzene 3,700 Toluene 1,200 Ethylbenzene 370 Total Xylenes 1,380 Acetone 960 J 2-Butanone 940 Diisopropyl Ether 290 2-Hexanone 220 J Methyl tert-Butyl Ether 2,900 Naphthalene 300 n-Propylbenzene 61 1,2,4-Trimethylbenzene 230 1,3,5-Trimethylbenzene 120 MW-5 Acetone 6.2 J MW-7 Benzene 6.8 Toluene 13 Ethylbenzene 1.2 Total Xylenes 5.8 Methyl tert-Butyl Ether 6.4 n-Propylbenzene 0.90 1,2,4-Trimethylbenzene 0.75 J SOURCE: CHATHAM COUNTY GISDATED 2013 SCALE AS SHOWN FIGURE 9 BENZENE ISOCONCENTRATION MAP PETRO MART #4 11455 NC HIGHWAY 15/501 NORTH CHAPEL HILL, CHATHAM COUNTY, NORTH CAROLINA NCDEQ INCIDENT NO. TF-3274 ECS PROJECT NO. 49:6230-D Scale: 1 inch = 80 feet LEGEND Approximate Location of Monitoring Well Benzene Isoconcentration Contour (µg/L) 48,000 Underlined Concentration Above GCL 1,500 Bold Concentration Above NC2LGWQS BRL Below Reporting Limit NOTES: 1.) Deep Monitoring Wells MW-11 and MW-12 were used to determine the horizontal extent of benzene. MW-1 MW-5 BRL Approximate Location of Current USTs MW-2 BRL MW-8 BRL MW-9 BRL MW-10 BRL Approximate Location of Former USTs MW-6 BRL MW-1 BRL (10) (1) MW-11* BRL MW-3 48,000 MW-4 1,500 MW-12* 3,700 MW-7 6.8 SOURCE: CHATHAM COUNTY GISDATED 2013 SCALE AS SHOWN FIGURE 10 MTBE ISOCONCENTRATION MAP PETRO MART #4 11455 NC HIGHWAY 15/501 NORTH CHAPEL HILL, CHATHAM COUNTY, NORTH CAROLINA NCDEQ INCIDENT NO. TF-3274 ECS PROJECT NO. 49:6230-D Scale: 1 inch = 80 feet LEGEND Approximate Location of Monitoring Well MTBE Isoconcentration Contour (µg/L) 400 Bold Concentration Above NC2LGWQS BRL Below Reporting Limit NOTES: 1.) Deep Monitoring Wells MW-11 & MW-12 were used to determine the horizontal extent of MTBE. MW-1 MW-5 BRL MW-6 BRL Approximate Location of Current USTs MW-2100 MW-1 40 MW-8 4.5 MW-7 6.4 MW-3 4,800 MW-4 590 MW-11* 5.1 MW-12* 2,900 MW-9 21 MW-10 BRL Approximate Location of Former USTs SOURCE: AQTESOLV AND BIOSCREEN FIGURE 11 FATE AND TRANSPORT MODEL SUMMARY BENZENE PETRO MART #4 11455 NC HIGHWAY 15/501 NORTH CHAPEL HILL, CHATHAM COUNTY, NORTH CAROLINA NCDEQ INCIDENT NO. TF-3274 ECS PROJECT NO. 49:6230-D BENZENE TABLES UST ID Number Last Contents Previous Contents Capacity (in Gallons) Construction Details Tank Dimensions Installation Date Removal Date Status 1 Kerosene Kerosene 2,000 Unknown 12.0' x 5.33'11/10/1986 3/7/2001 Removed 2 Diesel Diesel 3,000 Unknown 12.0' x 5.33'11/10/1986 3/7/2001 Removed 3 Gasoline Gasoline 6,000 Unknown 16.16' x 8.0'11/10/1986 3/7/2001 Removed 4 Gasoline Gasoline 8,000 Unknown 20.66' x 8'11/10/1986 3/7/2001 Removed 5 Gasoline Gasoline 8,000 Unknown 20.66' x 8'11/10/1986 3/7/2001 Removed 6 Gasoline Gasoline 12,000 Unknown Unknown May 2001 Current Current 7 Gasoline Gasoline 8,000 Unknown Unknown May 2001 Current Current 8 Diesel Diesel 6,000 Unknown Unknown May 2001 Current Current Chapel Hill, Chatham County, North Carolina ECS Project No. 49:6230-D Table 1 UST Information Petro Mart #4 11455 NC Highway 15/501 North NCDEQ Incident No. 3274 PARAMETER Sample ID SS-1A SS-1B SS-2A SS-2B SS-1A SS-1B SS-2A SS-2B SS-3A SS-3B SS-4A SS-4B SS-5A SS-5B SS-6A SS-6B SS-7A SS-7B SS-8A SS-8B SS-9A SS-9B SS-10A SS-10B SS-11A SS-11B SS-12A SS-12B Collection DateSample Depth (ft bgs)3-5 8-10 3-5 8-10 11.5-13.5 18.5-19.5 14.0-15.0 18.5-19.5 14.0-15.0 18.5-19.5 14.0-15.0 18.5-19.5 13.0-14.0 18.5-19.5 8.5-9.5 18.5-19.5 8.5-9.5 18.5-19.5 8.5-9.5 18.5-19.5 14.5-15.5 18.5-19.5 9.0-13.0 18.5-19.5 4.0-14.0 18.5-19.5 9.0-10.0 18.5-19.5 PID Reading (ppm)NA NA NA NA 3.2 7.2 8.4 5.7 38.0 40.8 33.7 24.5 21.7 22.1 20.0 18.4 0.4 5.1 2.2 68.0 9.5 62.7 25.2 41.1 33.3 31.3 6.6 33.8 Benzene BRL BRL BRL BRL BRL BRL BRL BRL BRL BRL BRL 1.8 BRL 3.1 BRL 0.0064 BRL BRL BRL BRL BRL BRL BRL BRL BRL BRL BRL BRL 0.0056 18 164 n-Butylbenzene BRL BRL BRL BRL BRL BRL BRL BRL BRL 0.30 8.5 20.8 17.2 40.7 BRL 0.13 BRL BRL BRL BRL BRL BRL BRL 0.50 2.3 18.2 BRL BRL 4.3 626 16,350Methylene chloride BRL BRL 0.032 BRL BRL BRL BRL BRL BRL BRL BRL BRL BRL BRL BRL BRL BRL BRL BRL BRL BRL BRL BRL BRL BRL BRL BRL BRL 0.02 85 763Methyl-tert-butyl ether BRL BRL BRL BRL BRL BRL BRL BRL BRL BRL BRL BRL BRL BRL BRL 0.010 BRL 0.011 0.0058 0.020 BRL 0.032 BRL BRL BRL BRL BRL BRL 0.091 350 3,100sec-Butylbenzene BRL BRL BRL BRL BRL BRL BRL BRL 0.99 BRL 2.0 4.4 3.5 8.3 BRL 0.023 BRL BRL BRL BRL BRL BRL BRL BRL 0.55 4.7 BRL BRL 3.3 626 16,350IsopropylbenzeneBRLBRLBRLBRLBRLBRLBRLBRL1.7 BRL 2.8 10.6 4.8 19.8 BRL 0.024 BRL BRL BRL BRL BRL BRL BRL BRL 0.71 8.9 BRL BRL 1.7 1,564 40,880EthylbenzeneBRLBRLBRLBRLBRLBRLBRLBRL10.8 0.32 11.0 101 27.4 176 BRL 0.12 BRL BRL BRL BRL 0.0062 BRL BRL BRL 2.7 42.7 BRL BRL 4.9 1,560 40,000 p-Isopropyltoluene BRL BRL BRL BRL BRL BRL BRL 1.6 3.6 0.18 5.3 BRL 9.0 20.8 BRL 0.066 BRL BRL BRL BRL BRL BRL 0.012 BRL 1.5 11.7 BRL BRL 0.12 100 4,000 Naphthalene BRL BRL BRL BRL BRL BRL BRL 10.7 14.1 1.2 30.0 121 48.6 149 BRL BRL BRL BRL BRL 0.024 0.038 0.081 0.56 3.3 8.6 45.3 BRL 0.059 0.16 313 8,176 Acetone BRL BRL BRL BRL BRL BRL BRL 31.0 11.8 BRL BRL BRL BRL BRL BRL BRL BRL BRL BRL BRL BRL BRL BRL BRL BRL BRL BRL BRL 24 14,000 360,000n-Propylbenzene BRL BRL BRL BRL BRL BRL BRL 2.3 7.3 0.34 11.6 44.7 25.4 90.3 BRL 0.12 BRL BRL BRL BRL BRL BRL 0.0098 BRL 3.2 BRL BRL BRL 1.7 626 16,350TolueneBRLBRLBRLBRLBRLBRLBRLBRL6.9 0.20 3.0 170 16.6 245 BRL 0.11 BRL BRL BRL 0.0096 BRL 0.012 BRL BRL 0.60 22.6 BRL BRL 4.3 1,200 32,0001,2,3-Trichloropropane BRL BRL BRL BRL BRL BRL BRL BRL BRL BRL BRL BRL 3.7 BRL BRL BRL BRL BRL BRL BRL BRL BRL BRL BRL BRL BRL BRL BRL NS NS NS1,2,4-Trimethylbenzene BRL BRL BRL BRL BRL BRL BRL 21.2 59.1 3.3 100 272 182 592 BRL 0.23 BRL BRL BRL 0.0064 0.039 0.022 0.15 3.0 24.3 190 0.0073 0.0062 8.5 782 20,4401,3,5-Trimethylbenzene BRL BRL BRL BRL BRL BRL BRL 6.2 18.3 0.96 29.9 81.8 51.7 177 BRL BRL BRL BRL BRL BRL 0.010 BRL 0.036 0.80 7.4 57.7 BRL BRL 8.5 782 20,440Total Xylenes BRL BRL BRL BRL BRL BRL BRL 7.0 61.4 2.4 66.3 506 128 943 BRL BRL BRL BRL BRL BRL 0.017 0.022 0.023 0.32 15.5 234 BRL BRL 4.6 3,129 81,760 All Other VOCs BRL BRL BRL BRL BRL BRL BRL BRL BRL BRL BRL BRL BRL BRL BRL BRL BRL BRL BRL BRL BRL BRL BRL BRL BRL BRL BRL BRL 1-Methylnaphthalene NS NS NS NS BRL BRL BRL 7.1 6.0 BRL 7.8 23.5 21.5 25.2 BRL 0.51 BRL BRL BRL BRL BRL BRL BRL 1.3 1.8 11.5 BRL BRL 0.004 20 1002-Methylnaphthalene NS NS NS NS BRL BRL BRL 13.8 12.0 0.63 15.5 64.5 45.0 54.9 BRL 0.96 BRL BRL BRL BRL BRL BRL 0.73 2.6 3.8 24.6 BRL BRL 3.6 63 1,635NaphthaleneNSNSNSNSBRLBRLBRL12.2 10.3 0.63 14.3 62.7 34.4 59.6 BRL 0.44 BRL BRL BRL BRL BRL BRL BRL 1.6 3.3 24.7 BRL BRL 0.16 313 8,176PhrenantheneNSNSNSNSBRLBRLBRL0.65 BRL BRL BRL BRL BRL BRL BRL BRL BRL BRL BRL BRL BRL BRL BRL BRL BRL BRL BRL BRL 56 469 12,264All other SVOCs NS NS NS NS BRL BRL BRL BRL BRL BRL BRL BRL BRL BRL BRL BRL BRL BRL BRL BRL BRL BRL BRL BRL BRL BRL BRL BRL Aliphatics (C5-C8)NS NS NS NS BRL BRL BRL 10.3 31.9 BRL 166 736 113 573 BRL BRL BRL BRL BRL BRL BRL BRL BRL 7.6 70.7 118 BRL BRL 68 939 24,528Aliphatics (C9-C18)NS NS NS NS BRL BRL 2.8 422.1 287 6.8 576 1,353 868 1,900 BRL 5.7 BRL BRL BRL BRL BRL BRL 3.2 15.3 337 898 BRL BRL 540 1,500 40,000Aliphatics (C19-C36)NS NS NS NS BRL BRL BRL BRL BRL BRL BRL BRL BRL BRL BRL BRL BRL BRL BRL BRL BRL BRL BRL BRL BRL BRL BRL BRL Immobile 31,000 810,000Aromatics (C9-C22)NS NS NS NS BRL BRL 5.2 220.7 272 4.8 539 1,154 896 1,993 BRL BRL BRL BRL BRL BRL BRL BRL 3.4 9.8 318.2 509 BRL BRL 31 469 12,264 NOTES: Results presented in milligrams per kilogram (mg/kg), analogous to parts per million (ppm)mg/kg = Milligrams per Kilogram Underlined = Detected above the Soil-to-Water Maximum Contaminant Concentration and Residential Soil Cleanup Level Bold = Detected above the Action Level or Soil-to-Water Maximum Contaminant Concentration BRL = Below Laboratory Reporting LimitNS = Not StandardNA = Not Applicable Soil-to-Water Maximum Contaminant Concentration Residential Soil Cleanup Level Industrial/ Commercial Soil Cleanup Level Table 2 Summary of Historical Soil Analytical Results Petro Mart #4 11455 NC Highway 15/501 NorthChapel Hill, Chatham County, North CarolinaNCDEQ Incident No. 3274 ANALYTICAL RESULTS 4/15/2015 NCDEQ = North Carolina Department of Environmental Quality 11/5/2018 Volitile Petroluem Hydrocarbons (VPH) and Extractable Petroleum Hydrocarbons (EPH) by MADEP ECS Project No. 49:6230-D Volatile Organic Compounds (VOCs) by EPA Method 8260 --Semi-Volatile Organic Compounds (SVOCs) by EPA Method 8270 -- Water Supply Well ID Well Owner / Address**Well Address Well Use Well Depth (ft bgs)Type of Well Approximate Distance from Source Area of Release (ft) WSW-1 Jean Williams (AQUA) PO Box 429 Carrboro, NC 27510 Cedar Terrace Chapel Hill, NC 27514 Potable 400 Drilled Approximately 380 ft west WSW-5 Jean Williams PO Box 429 Carrboro, NC 27510 29 Cedar Lake Road Chapel Hill, NC 27514 Inactive Unknown Drilled Approximately 680 ft west WSW-6 Cheryl Curl Atwater and Toni Buck Curl 709 Reserve Estates Drive Wake Forest, NC 27586 Cedar Village Road Chapel Hill, NC 27514 Inactive Unknown Drilled Approximately 280 ft southwest WSW-7 Cheryl Curl Atwater and Toni Buck Curl 709 Reserve Estates Drive Wake Forest, NC 27587 103 Cedar Village Road Chapel Hill, NC 27514 Inactive Unknown Drilled Approximately 930 ft southwest NOTES: ** ECS confirmed ownership details via Chatham County GIS on October 10, 2019. ECS Project No. 49:6230-D Table 3 Water Supply Well Survey Petro Mart #4 11455 NC Highway 15/501 North Chapel Hill, Chatham County, North Carolina NCDEQ Incident No. TF-3274 SAMPLE ID MW-1 MW-2 MW-3 MW-4 MW-5 MW-6 MW-7 MW-8 MW-9 MW-10 MW-11 MW-12Date SampledpH 6.24 6.34 6.36 6.42 6.29 7.52 6.03 5.65 6.07 5.86 8.64 8.64 Temperature (oC)19.83 19.78 19.28 20.20 18.97 17.80 18.42 18.16 18.50 20.52 17.31 16.41 Conductivity (mS/cm)0.134 0.122 0.319 0.302 0.148 0.214 0.200 0.351 0.287 0.391 0.046 0.009Dissolved O2 (mg/L)1.72 13.19 3.36 3.57 2.01 1.63 3.45 7.25 3.97 4.52 1.70 2.13Turbidity (Observed)ST ST ST T ST NT T ST T NT NT ST NOTES:mS/cm = milliseimens per centimeter°C = degress Celsius NT= Not Turbid ST= Slightly TurbidT= Turbidmg/L= milligrams per Liter Measured using YSI model 556 Meter ECS Project No. 49:6230-D 3/26/2020 Table 4 Geochemical Measurements Petro Mart #4 11455 NC Highway 15/501 North Chapel Hill, Chatham County, North Carolina NCDEQ Incident No. 3274 Monitoring Well ID Date Measured Depth to Groundwater (ft. btoc) Date Installed Total Well Depth (ft. btoc) Screen Interval (ft. btoc) TOC Elevation* Groundwater Elevation (ft) MW-1 3/26/2020 32.58 4/15/2015 55 40-55 553.43 520.85 MW-2 3/26/2020 31.20 4/15/2015 54 39-54 552.44 521.24 MW-3 3/26/2020 31.39 8/10/2015 49 29-49 553.03 521.64 MW-4 3/26/2020 30.29 8/10/2015 46 26-46 551.76 521.47 MW-5 3/26/2020 32.49 8/10/2015 52 32-52 553.40 520.91 MW-6 3/26/2020 30.47 8/10/2015 52 32-52 551.94 521.47 MW-7 3/26/2020 32.45 11/6/2018 45 30-45 554.18 521.73 MW-8 3/26/2020 29.69 11/6/2018 45 30-45 551.94 522.25 MW-9 3/26/2020 32.45 9/24/2019 50 30-50 553.57 521.12 MW-10 3/26/2020 36.30 9/24/2019 50 30-50 558.02 521.72 MW-11 3/26/2020 32.53 9/25/2019 69 59-69 553.86 521.33 MW-12 3/26/2020 30.36 9/25/2019 66 56-66 551.76 521.40 NOTES: ft. btoc = Feet Below Top of Casing TOC = Top of Casing* = Survey performed by Bateman Civil Survey and KCI on March 6, 2019 and October 1, 2019, respectively. The site vertical datum is based on NAV88 and the horizontal datum is based on NAD83. Table 5 Monitoring Well Construction and Groundwater Elevation Details Petro Mart #4 11455 NC Highway 15/501 North Chapel Hill, Chatham County, North Carolina ECS Project No. 49:6230-D NCDEQ Incident No. 3274 Sample ID Sample Date BenzeneTolueneEthylbenzeneTotal XylenesAcetone2-Butanone (MEK)n-ButylbenzeneChloroformDiisopropyl Ether (DIPE)2-Hexanone (MBK)IsopropylbenzeneMethyl tert-Butyl Ether (MTBE)Naphthalenen-Propylbenzene1,2,4-Trimethylbenzene1,3,5-TrimethylbenzeneMW-1 3/26/2020 BRL BRL BRL BRL 5.2 J BRL BRL BRL BRL BRL BRL 40 BRL BRL BRL BRLMW-2 3/26/2020 BRL BRL BRL BRL BRL BRL BRL BRL 6.6 BRL BRL 100 BRL BRL BRL BRLMW-3 3/26/2020 48,000 55,000 4,100 21,500 5,100 J 2,000 J 240 J BRL 200 J BRL 700 J 4,800 2,800 820 3,700 1,300MW-4 3/26/2020 1,500 49 120 450 24 J BRL 3.3 BRL 65 BRL 10 590 28 12 67 35MW-5 3/26/2020 BRL BRL BRL BRL 6.2 J BRL BRL BRL BRL BRL BRL BRL BRL BRL BRL BRLMW-6 3/26/2020 BRL BRL BRL BRL BRL BRL BRL BRL BRL BRL BRL BRL BRL BRL BRL BRLMW-7 3/26/2020 6.8 13 1.2 5.8 BRL BRL BRL BRL BRL BRL BRL 6.4 BRL 0.90 0.75 J BRLMW-8 3/26/2020 BRL BRL BRL BRL BRL BRL BRL BRL BRL BRL BRL 4.5 BRL BRL BRL BRLMW-9 3/26/2020 BRL BRL BRL BRL 6.5 J BRL BRL BRL BRL BRL BRL 21 BRL BRL BRL BRLMW-10 3/26/2020 BRL BRL BRL BRL BRL BRL BRL 7.0 BRL BRL BRL BRL BRL BRL BRL BRLMW-11 3/26/2020 BRL BRL BRL BRL BRL BRL BRL BRL BRL BRL BRL 5.1 BRL BRL BRL BRL MW-12 3/26/2020 3,700 1,200 370 1,380 960 J 940 BRL BRL 290 220 J BRL 2,900 300 61 230 120 Field Blank 3/26/2020 BRL BRL BRL BRL BRL BRL BRL BRL BRL BRL BRL BRL BRL BRL BRL BRL 1 600 600 500 6,000 4,000 70 70 70 40 70 20 6 70 400 400 5,000 260,000 84,500 85,500 6,000,000 4,000,000 6,900 70,000 70,000 40,000 25,000 20,000 6,000 30,000 28,500 25,000 NOTES:NC2LGWQS = North Carolina 2L Groundwater Quality Standard as of September 18, 2014GCL = NCDEQ's Gross Contamination Levels for Groundwater as of September 18, 2014(µg/L) = Micrograms per Liter Bold = Reported above the NC2LGWQS Underline = Reported above the NC2LGWQS and GCL BRL = Below Laboratory Reporting Limit J = Estimated Concentration NCDEQ Incident No. 3274 ECS Project No. 49:6230-D Contaminant of Concern (µg/L)Analytical Method Standard Method 6200B NC2LGWQS (µg/L)GCL (µg/L) Table 6 Summary of Current Groundwater Analytical Results Petro Mart #4 11455 NC Highway 15/501 NorthChapel Hill, Chatham County, North Carolina Sample ID Date Collected BenzeneTolueneEthylbenzeneTotal XylenesAcetone2-Butanone (MEK)n-ButylbenzeneChloroform1,4-DichlorobenzeneDiisopropyl Ether (DIPE)Ethanol2-Hexanone (MBK)IsopropylbenzeneMethyl tert-Butyl Ether (MTBE)4-Methyl-2-pentanone (MIBK)Naphthalenen-PropylbenzeneStyrene1,2,4- Trimethylbenzene1,3,5-Trimethylbenzene*MW-1 2/8/1995 1,800 3,400 300 760 BRL BRL BRL BRL BRL BRL BRL BRL BRL 1,200 BRL BRL BRL BRL BRL BRL *MW-2 2/8/1995 1.0 1.6 BRL BRL BRL BRL BRL BRL BRL BRL BRL BRL BRL BRL BRL BRL BRL BRL BRL BRL4/16/2015 BRL BRL BRL BRL BRL BRL BRL BRL BRL 0.90 BRL 12,830 BRL 53.5 BRL BRL BRL BRL BRL BRL8/12/2015 BRL BRL BRL BRL BRL BRL BRL BRL BRL 1.2 BRL BRL BRL 76.5 BRL BRL BRL BRL BRL BRL 3/7/2018 BRL BRL BRL BRL BRL BRL BRL BRL BRL 0.64 BRL BRL BRL 53 BRL BRL BRL BRL BRL BRL11/5/2018 BRL BRL BRL BRL BRL BRL BRL BRL BRL BRL BRL BRL BRL 37.2 BRL BRL BRL BRL BRL BRL3/6/2019 BRL BRL BRL BRL BRL BRL BRL BRL BRL 0.43 J BRL BRL BRL 41 BRL BRL BRL BRL BRL BRL10/1/2019 BRL BRL BRL BRL BRL BRL BRL BRL BRL 0.45 J BRL BRL BRL 28 BRL BRL BRL BRL BRL BRL3/26/2020 BRL BRL BRL BRL 5.2 J BRL BRL BRL BRL BRL BRL BRL BRL 40 BRL BRL BRL BRL BRL BRL4/16/2015 73.3 0.64 2.7 83.8 BRL BRL BRL BRL BRL 17.3 BRL BRL 1.7 296 BRL BRL 1.4 BRL 6.2 BRL8/12/2015 BRL BRL BRL BRL BRL BRL BRL BRL BRL 13.5 BRL BRL BRL 250 BRL BRL BRL BRL BRL BRL3/7/2018 BRL BRL BRL BRL BRL BRL BRL BRL BRL 9.9 BRL BRL BRL 130 BRL BRL BRL BRL BRL BRL11/5/2018 BRL BRL BRL BRL BRL BRL BRL BRL BRL 6.9 BRL BRL BRL 84.4 BRL BRL BRL BRL BRL BRL3/6/2019 BRL BRL BRL BRL BRL BRL BRL BRL BRL 7.3 BRL BRL BRL 100 BRL BRL BRL BRL BRL BRL10/1/2019 BRL BRL BRL BRL BRL BRL BRL BRL BRL 7.0 BRL BRL BRL 68 BRL BRL BRL BRL BRL BRL 3/26/2020 BRL BRL BRL BRL BRL BRL BRL BRL BRL 6.6 BRL BRL BRL 100 BRL BRL BRL BRL BRL BRL8/12/2015 29,900 32,800 1,860 9,140 BRL BRL BRL BRL BRL 229 BRL BRL 50.3 22,700 BRL 733 188 34.4 1,350 3403/7/201811/5/2018 31,900 38,700 2,880 13,830 BRL BRL BRL BRL BRL 130 BRL BRL BRL 7,760 BRL 758 BRL BRL 2,150 BRL3/6/2019 28,000 43,000 3,300 16,600 10,000 J 2,700 BRL BRL BRL 290 BRL BRL 100 J 7,200 BRL 1,900 290 BRL 2,400 56010/1/2019 24,000 48,000 4,200 20,600 BRL 2,400 J BRL BRL BRL 280 BRL 810 J 140 J 3,600 BRL 2,300 J 440 BRL 2,400 7803/26/2020 48,000 55,000 4,100 21,500 5,100 J 2,000 J 240 J BRL BRL 200 J BRL BRL 700 J 4,800 BRL 2,800 820 BRL 3,700 1,3008/12/2015 1,410 1,680 98.9 2,497 BRL BRL BRL BRL BRL 296 BRL BRL BRL 4,950 BRL 26.2 7.5 BRL 306 1243/7/2018 1,200 620 74 1,730 BRL BRL BRL BRL BRL 160 BRL 320 3.6 J 2,100 47 J BRL 11 BRL 200 7411/5/2018 309 24.3 37 311 BRL BRL BRL BRL BRL 76.4 BRL BRL BRL 834 BRL 10.1 BRL BRL 47.9 BRL3/6/2019 420 4.5 J 28 271 BRL BRL BRL BRL BRL 77 BRL BRL 1.3 J 830 BRL 36 2.0 J BRL 48 20 10/1/2019 410 6.7 81 206 BRL BRL BRL BRL BRL 68 BRL BRL 3.8 J 400 BRL BRL 6.8 BRL 27 263/26/2020 1,500 49 120 450 24 J BRL 3.3 BRL BRL 65 BRL BRL 10 590 BRL 28 12 BRL 67 358/12/2015 1.3 2.8 0.53 2.55 BRL BRL BRL BRL BRL BRL BRL BRL BRL BRL BRL BRL BRL BRL BRL BRL 3/7/2018 BRL BRL BRL BRL BRL BRL BRL BRL BRL BRL BRL BRL BRL BRL BRL BRL BRL BRL BRL BRL11/5/2018 BRL BRL BRL BRL BRL BRL BRL BRL BRL BRL BRL BRL BRL BRL BRL BRL BRL BRL BRL BRL3/6/2019 BRL BRL BRL BRL BRL BRL BRL BRL BRL BRL BRL BRL BRL BRL BRL BRL BRL BRL BRL BRL10/1/2019 BRL BRL BRL BRL BRL BRL BRL BRL BRL BRL BRL BRL BRL BRL BRL BRL BRL BRL BRL BRL3/26/2020 BRL BRL BRL BRL 6.2 J BRL BRL BRL BRL BRL BRL BRL BRL BRL BRL BRL BRL BRL BRL BRL8/12/2015 2.4 5.2 0.76 3.7 BRL BRL BRL BRL BRL BRL BRL BRL BRL 0.76 BRL BRL BRL BRL BRL BRL3/7/2018 BRL BRL BRL BRL BRL BRL BRL BRL BRL BRL BRL BRL BRL BRL BRL BRL BRL BRL BRL BRL11/5/2018 BRL BRL BRL BRL BRL BRL BRL BRL BRL BRL BRL BRL BRL BRL BRL BRL BRL BRL BRL BRL3/6/2019 BRL BRL BRL BRL BRL BRL BRL BRL BRL BRL BRL BRL BRL BRL BRL BRL BRL BRL BRL BRL10/1/2019 BRL BRL BRL BRL BRL BRL BRL BRL BRL BRL BRL BRL BRL BRL BRL BRL BRL BRL BRL BRL3/26/2020 BRL BRL BRL BRL BRL BRL BRL BRL BRL BRL BRL BRL BRL BRL BRL BRL BRL BRL BRL BRL 11/8/2018 BRL BRL BRL BRL BRL BRL BRL BRL 0.9 BRL BRL BRL BRL 5.1 BRL BRL BRL BRL BRL BRL3/6/2019 0.17 J 0.65 BRL 0.31 J BRL BRL BRL BRL 0.50 BRL BRL BRL BRL 3.9 BRL BRL BRL BRL BRL BRL10/1/2019 BRL BRL BRL BRL BRL BRL BRL BRL BRL BRL BRL BRL BRL 2.8 BRL BRL BRL BRL BRL BRL3/26/2020 6.8 13 1.2 5.8 BRL BRL BRL BRL BRL BRL BRL BRL BRL 6.4 BRL BRL 0.90 BRL 0.75 J BRL11/8/2018 BRL BRL BRL BRL BRL BRL BRL BRL 0.57 BRL BRL BRL BRL 4.8 BRL BRL BRL BRL BRL BRL3/6/2019 BRL 0.43 J BRL BRL BRL BRL BRL BRL 0.23 J BRL BRL BRL BRL 3.6 BRL BRL BRL BRL BRL BRL 10/1/2019 BRL BRL BRL BRL BRL BRL BRL BRL BRL BRL BRL BRL BRL 2.7 BRL BRL BRL BRL BRL BRL3/26/2020 BRL BRL BRL BRL BRL BRL BRL BRL BRL BRL BRL BRL BRL 4.5 BRL BRL BRL BRL BRL BRL10/1/2019 BRL BRL BRL BRL BRL BRL BRL BRL BRL 0.21 J BRL BRL BRL 11 BRL BRL BRL BRL BRL BRL 3/26/2020 BRL BRL BRL BRL 6.5 J BRL BRL BRL BRL BRL BRL BRL BRL 21 BRL BRL BRL BRL BRL BRL10/1/2019 BRL BRL BRL BRL BRL BRL BRL 11 BRL BRL BRL BRL BRL BRL BRL BRL BRL BRL BRL BRL 3/26/2020 BRL BRL BRL BRL BRL BRL BRL 7.0 BRL BRL BRL BRL BRL BRL BRL BRL BRL BRL BRL BRL 10/1/2019 BRL 0.18 J BRL BRL BRL BRL BRL BRL BRL BRL BRL BRL BRL 2.2 BRL BRL BRL BRL BRL BRL3/26/2020 BRL BRL BRL BRL BRL BRL BRL BRL BRL BRL BRL BRL BRL 5.1 BRL BRL BRL BRL BRL BRL 10/1/2019 2,300 4,600 540 1,119 BRL BRL BRL BRL BRL 180 BRL 460 J 19 J 1,300 190 J 450 J 39 J BRL 520 1903/26/2020 3,700 1,200 370 1,380 960 J 940 BRL BRL BRL 290 BRL 220 J BRL 2,900 BRL 300 61 BRL 230 12016006005006,000 4,000 70 70 6 70 4,000 40 70 20 100 6 70 70 400 4005,000 260,000 84,500 85,500 6,000,000 4,000,000 6,900 70,000 6,000 70,000 4,000,000 40,000 25,000 20,000 100,000 6,000 30,000 70,000 28,500 25,000 NOTES:NC2LGWQS = North Carolina 2L Groundwater Quality Standard as of September 18, 2014GCL = NCDEQ's Gross Contamination Levels for Groundwater as of September 18, 2014(µg/L) = Micrograms per LiterBold = Reported above the NC2LGWQS or NCDEQ Final and Interim GWQSUnderline = Reported above the NC2LGWQS and GCLBRL = Below Laboratory Reporting Limit J = Estimated Concentration * = Monitoring wells were abandoned in March 2001^ = Deep, Type II monitoring wells MW-9 MW-3 MW-4 MW-5 MW-6 MW-7 MW-8 NC2LGWQS (µg/L)Gross Contamination Level (µg/L) Contaminant of Concern (µg/L)Analytical Method 0.36 inches of Free Product Measured MW-1 MW-2 MW-10 MW-11^ MW-12^ Table 7Summary of Historical Groundwater Analytical ResultsPetro Mart #411455 NC Highway 15/501 NorthChapel Hill, Chatham County, North Carolina Standard Method 6200B (or equivalent) NCDEQ Incident No. 3274ECS Project No. 49:6230-D APPENDIX A Annual Drinking Water Quality Report CEDAR TERRACE (0319132) PWS #NC0319132 Este informe contiene informacion muy importante sobre su agua de beber. Traduzcalo o hable con alguien que lo entienda bien. Aqua North Carolina (Aqua) is pleased to present you with the Annual Drinking Water Quality Report for 2018. This report is designed to inform you about the quality of water and the services we deliver to you every day. Our constant goal is to provide you with a safe and dependable supply of drinking water. We want you to understand the efforts we make to continually improve the water treatment process and the efforts made to protect our water resources. Aqua is committed to meet or exceed all Federal and State standards, ensuring the quality of your water. Each of our community wells has a 100 foot protected area from potential sources of contamination. Our treatment process includes disinfection at each source, corrosion control, mineral control and filtration as needed. All drinking water, including bottled water, may reasonably be expected to contain at least small amounts of some contaminants. The presence of contaminants does not necessarily indicate that the water poses a health risk. More information about contaminants and potential health effects can be obtained by calling the Environmental Protection Agency's Safe Drinking Water Hotline (1.800.426.4791). Some people may be more vulnerable to contaminants in drinking water than the general population. Immuno- compromised persons, such as persons with cancer undergoing chemotherapy, persons who have undergone organ transplants, people with HIV/AIDS or other immune system disorders, some elderly, and infants can be particularly at risk from infections. These people should seek advice about drinking water from their health care providers. For EPA/CDC guidelines on appropriate means to lessen the risk of infection by Cryptosporidium and other microbiological contaminants please call the Environmental Protection Agency's Safe Drinking Water Hotline at 1.800.426.4791. It is important to remember that the presence of these contaminants does not necessarily pose a health risk. The sources of drinking water (both tap water and bottled water) include rivers, lakes, streams, ponds, reservoirs, springs, and wells. As water travels over the surface of the land or through the ground, it dissolves naturally-occurring minerals and, in some cases, radioactive material, and can pick up substances resulting from the presence of animals or from human activity. Contaminants that may be present in source water include microbial contaminants, such as viruses and bacteria, which may come from sewage treatment plants, septic systems, agricultural livestock operations, and wildlife; inorganic contaminants, such as salts and metals, which can be naturally-occurring or result from urban stormwater runoff, industrial or domestic wastewater discharges, oil and gas production, mining, or farming; pesticides and herbicides, which may come from a variety of sources such as agriculture, urban stormwater runoff, and residential uses; organic chemical contaminants, including synthetic and volatile organic chemicals, which are by-products of industrial processes and petroleum production, and can also come from gas stations, urban stormwater runoff, and septic systems; and radioactive contaminants, which can be naturally-occurring or be the result of oil and gas production and mining activities. In order to ensure that tap water is safe to drink, EPA prescribes regulations which limit the amount of certain contaminants in water provided by public water systems. FDA regulations establish limits for contaminants in bottled water which must provide the same protection for public health. The North Carolina Department of Environment and Natural Resources (DENR), Public Water Supply (PWS) Section, Source Water Assessment Program (SWAP) conducted assessments for all drinking water sources across North Carolina. The purpose of the assessments was to determine the susceptibility of each drinking water source (well or surface water intake) to Potential Contaminant Sources (PCSs). The results of the assessment are available in SWAP Assessment Reports that include maps, background information and a relative susceptibility rating of Higher, Moderate or Lower. The relative susceptibility rating of each source for Cedar Terrace (0319132) was determined by combining the contaminant rating (number and location of PCSs within the assessment area) and the inherent vulnerability rating (i.e., characteristics or existing conditions of the well or watershed and its delineated assessment area.). The assessment findings are summarized in the table below: Susceptibility of Sources to Potential Contaminant Sources (PCSs) Source Name Susceptibility Rating SWAP Report Date WELL-1 Moderate August 2017 The complete SWAP Assessment report for Cedar Terrace (0319132) may be viewed on the Web at: https://www.ncwater.org/?page=600. Please note that because SWAP results and reports are periodically updated by the PWS Section, the results available on the web site may differ from the results that were available at the time this CCR was prepared. To obtain a printed copy of this report, please mail a written request to: Source Water Assessment Program - Report Request, 1634 Mail Service Center, Raleigh NC 27699, or email request to swap@ncdenr.gov. Please indicate your system name, PWSID and provide your name, mailing address and phone number. If you have any questions about the SWAP report, contact the Source Water Assessment staff by phone at 919.707.9098. It is important to understand that a susceptibility rating of ''higher'' does not imply poor water quality, only the systems potential to become contaminated by PCSs in the assessment area. This report shows our water quality and what it means. If you have any questions about this report, or would like to learn more about your water system, please contact our Customer Service Department at 1.877.987.2782 during the hours of 8:00 a.m. to 5:00 p.m., Monday through Friday or visit our website at www.AquaAmerica.com. Aqua routinely monitors for over 150 contaminants in your drinking water according to Federal and State laws. The attached table shows detections found for the monitoring period of January 1st to December 31st, 2018 and the last test results of contaminants that were not due to be tested in 2018. In the table you will find many terms and abbreviations you might not be familiar with. The following are terms and abbreviations used throughout this report: Action Level (AL) - The concentration of a contaminant which, if exceeded, triggers treatment or other requirements which a water system must follow. Locational Running Annual Average (LRAA) – The average of sample analytical results for samples taken at a particular monitoring location during the previous four calendar quarters under the Stage 2 Disinfectants and Disinfection Byproducts Rule. Maximum Contaminant Level (MCL) - The highest level of a contaminant that is allowed in drinking water. MCLs are set as close to the MCLGs as feasible using the best available treatment technology. MCLs are set at very stringent levels. To understand the possible health effects described for many regulated constituents, a person would have to drink 2 liters of water every day at the MCL level for a lifetime to have a one-in-a-million chance of having the described health effect. Maximum Contaminant Level Goal (MCLG) - The level of a contaminant in drinking water below which there is no known or expected risk to health. MCLGs allow for a margin of safety. Maximum Residual Disinfection Level (MRDL) – The highest level of a disinfectant allowed in drinking water. There is convincing evidence that addition of a disinfectant is necessary for control of microbial contaminants. Maximum Residual Disinfection Level Goal (MRDLG) – The level of a drinking water disinfectant below which there is no known or expected risk to health. MRDLGs do not reflect the benefits of the use of disinfectants to control microbial contaminants. Not Applicable (NA) – Information not applicable/not required for that particular water system or for that particular rule. Non-Detects (ND) - Laboratory analysis indicates that the contaminant is not present at the level of detection set for the particular methodology used. Parts per million (ppm) - One part per million corresponds to one minute in two years or a single penny in $10,000. Parts per billion (ppb) - One part per billion corresponds to one minute in 2,000 years, or a single penny in $10,000,000. Parts per trillion (ppt) or Nanograms per liter (nanograms/L) - One part per trillion corresponds to one minute in 2,000,000 years, or a single penny in $10,000,000,000 Picocuries per liter (pCi/L) - Picocuries per liter is a measure of the radioactivity in water. Treatment Technique (TT) - A required process intended to reduce the level of a contaminant in drinking water. TEST RESULTS Contaminant (Units) MCL Violation (Y/N) Your Water MCLG MCL Likely source of Contamination Microbiological Contaminants TOTAL COLIFORM Present/Absent NA NA NA TT*Naturally present in the environment * If a system collecting fewer than 40 samples per month has two or more positive samples in one month, an assessment is required. Contaminant (Date) Units MCL MCLG Highest Level Range Avg Violation Likely source of Contamination Inorganic Contaminants FLUORIDE 2016 ppm 4.00 4.00 0.26 0.26 -0.26 0.26 No Erosion of natural deposits; water additive which promotes strong teeth; discharge from fertilizer and aluminum factories Contaminant (Date) Units MCL MCLG Highest Level Range Avg Violation Likely source of Contamination Nitrate/Nitrite Contaminants NITRATE 2018 ppm 10.00 10.00 2.10 2.10 -2.10 2.10 No Runoff from fertilizer use; leaching from septic tanks, sewage; erosion of natural deposits Contaminant Year Sampled Units MRDL Violation Y/N Range Your Water (Highest RAA) MRDLG MRDL Likely source of Contamination Disinfection FREE CHLORINE 2018 ppm NO 0.8 -2.1 1.37 4 4.0 Water additive used to control microbes Contaminant (Date) Sample Date Units Your Water Number of sites found above the AL MCLG AL Likely source of Contamination Lead and Copper COPPER 2018 ppm 0.13 0 1.30 AL = 1.3 Corrosion of household plumbing systems LEAD 2018 ppb ND 0 0.00 AL = 15.0 Corrosion of household plumbing systems If present, elevated levels of lead can cause serious health problems, especially for pregnant women and young children. Lead in drinking water is primarily from materials and components associated with service lines and home plumbing. Aqua is responsible for providing high quality drinking water, but cannot control the variety of materials used in plumbing components. When your water has been sitting for several hours, you can minimize the potential for lead exposure by flushing your tap for 30 seconds to 2 minutes before using water for drinking or cooking. If you are concerned about lead in your water, you may wish to have your water tested. Information on lead in drinking water, testing methods, and steps you can take to minimize exposure is available from the Safe Drinking Water Hotline or at http://www.epa.gov/safewater/lead. APPENDIX B SITE PHOTOGRAPHS PETRO MART #4 11455 NC HIGHWAY 15/501 NORTH CHAPEL HILL, CHATHAM COUNTY NORTH CAROLINA NCDEQ INCIDENT NO. 3274 ECS PROJECT NO. 49:6230-D Photograph 1: View of the subject site. View is to the southwest. Photograph 2: View of the slug test performed on monitoring well MW-3. SITE PHOTOGRAPHS PETRO MART #4 11455 NC HIGHWAY 15/501 NORTH CHAPEL HILL, CHATHAM COUNTY NORTH CAROLINA NCDEQ INCIDENT NO. 3274 ECS PROJECT NO. 49:6230-D Photograph 3: View of monitoring well MW-1. View is to the north. Photograph 4: View of monitoring well MW-2. View is to the south. SITE PHOTOGRAPHS PETRO MART #4 11455 NC HIGHWAY 15/501 NORTH CHAPEL HILL, CHATHAM COUNTY NORTH CAROLINA NCDEQ INCIDENT NO. 3274 ECS PROJECT NO. 49:6230-D Photograph 5: View of monitoring well MW-3. View is to the west. Photograph 6: View of monitoring wells MW-4 and MW-12. View is to the south. SITE PHOTOGRAPHS PETRO MART #4 11455 NC HIGHWAY 15/501 NORTH CHAPEL HILL, CHATHAM COUNTY NORTH CAROLINA NCDEQ INCIDENT NO. 3274 ECS PROJECT NO. 49:6230-D Photograph 7: View of monitoring well MW-5. View is to the east. Photograph 8: View of monitoring well MW-6. View is to the northwest. SITE PHOTOGRAPHS PETRO MART #4 11455 NC HIGHWAY 15/501 NORTH CHAPEL HILL, CHATHAM COUNTY NORTH CAROLINA NCDEQ INCIDENT NO. 3274 ECS PROJECT NO. 49:6230-D Photograph 9: View of monitoring wells MW-7 and MW-11. View is to the southwest. Photograph 10: View of monitoring well MW-8. View is to the north. SITE PHOTOGRAPHS PETRO MART #4 11455 NC HIGHWAY 15/501 NORTH CHAPEL HILL, CHATHAM COUNTY NORTH CAROLINA NCDEQ INCIDENT NO. 3274 ECS PROJECT NO. 49:6230-D Photograph 11: View of monitoring well MW-9. View is to the northeast. Photograph 12: View of monitoring well MW-10. View is to the northeast. APPENDIX C APPENDIX D 39 Spruce Street * East Longmeadow, MA 01028 * FAX 413/525-6405 * TEL. 413/525-2332 April 2, 2020 Matt Gillis ECS Southeast - Raleigh, NC 9001 Glenwood Avenue Raleigh, NC 27617 Project Location: Chapel Hill, NC Client Job Number: Project Number: 49:6230-D Laboratory Work Order Number: 20C1270 Enclosed are results of analyses for samples received by the laboratory on March 26, 2020. If you have any questions concerning this report, please feel free to contact me. Sincerely, Kerry K. McGee Project Manager Page 1 of 49 Table of Contents Table of Contents Sample Summary 3 Hits Only Report 4 Case Narrative 7 Sample Results 8 20C1270-01 8 20C1270-02 10 20C1270-03 12 20C1270-04 14 20C1270-05 16 20C1270-06 18 20C1270-07 20 20C1270-08 22 20C1270-09 24 20C1270-10 26 20C1270-11 28 20C1270-12 30 20C1270-13 32 Sample Preparation Information 34 QC Data 35 Volatile Organic Compounds by GC/MS 35 B255276 35 B255359 39 Flag/Qualifier Summary 43 Certifications 44 Chain of Custody/Sample Receipt 46 Page 2 of 49 Table of Contents 39 Spruce Street * East Longmeadow, MA 01028 * FAX 413/525-6405 * TEL. 413/525-2332 ANALYTICAL SUMMARY 4/2/2020 ECS Southeast - Raleigh, NC 9001 Glenwood Avenue Raleigh, NC 27617 ATTN: Matt Gillis 49:6230-D 20C1270 The results of analyses performed on the following samples submitted to the CON-TEST Analytical Laboratory are found in this report. PROJECT LOCATION: PURCHASE ORDER NUMBER: PROJECT NUMBER: REPORT DATE: WORK ORDER NUMBER: FIELD SAMPLE #LAB ID:MATRIX TESTSAMPLE DESCRIPTION SUB LAB Chapel Hill, NC MW-10 20C1270-01 Ground Water SM21-22 6200B MW-9 20C1270-02 Ground Water SM21-22 6200B MW-6 20C1270-03 Ground Water SM21-22 6200B MW-5 20C1270-04 Ground Water SM21-22 6200B MW-1 20C1270-05 Ground Water SM21-22 6200B MW-2 20C1270-06 Ground Water SM21-22 6200B MW-8 20C1270-07 Ground Water SM21-22 6200B MW-11 20C1270-08 Ground Water SM21-22 6200B MW-7 20C1270-09 Ground Water SM21-22 6200B MW-12 20C1270-10 Ground Water SM21-22 6200B MW-4 20C1270-11 Ground Water SM21-22 6200B MW-3 20C1270-12 Ground Water SM21-22 6200B field blank 20C1270-13 Field Blank SM21-22 6200B [TOC_1]Sample Summary[TOC] Page 3 of 49 Table of Contents 39 Spruce Street * East Longmeadow, MA 01028 * FAX 413/525-6405 * TEL. 413/525-2332 [TOC_1]Hits Only Report[TOC]EXECUTIVE SUMMARY Client ID:Lab ID:20C1270-03MW-6 No Results Detected Client ID:Lab ID:20C1270-13field blank No Results Detected Con-Test does not accept liability for the consequences of any actions taken solely on the basis of the information provided in the Executive Summary section of this report. Users must review this report in its entirety to determine data usability and assessment. Page 4 of 49 Table of Contents 39 Spruce Street * East Longmeadow, MA 01028 * FAX 413/525-6405 * TEL. 413/525-2332 EXECUTIVE SUMMARY Client ID:Lab ID: Analyte Results/Qual RL Units Method 20C1270-01MW-10 DL Chloroform 7.0 1.0 g/L SM21-22 6200B0.17 Client ID:Lab ID: Analyte Results/Qual RL Units Method 20C1270-02MW-9 DL Acetone 6.5 50 g/L SM21-22 6200BJ3.8 Methyl tert-Butyl Ether (MTBE)21 0.50 g/L SM21-22 6200B0.25 Client ID:Lab ID: Analyte Results/Qual RL Units Method 20C1270-04MW-5 DL Acetone 6.2 50 g/L SM21-22 6200BJ3.8 Client ID:Lab ID: Analyte Results/Qual RL Units Method 20C1270-05MW-1 DL Acetone 5.2 50 g/L SM21-22 6200BJ3.8 Methyl tert-Butyl Ether (MTBE)40 0.50 g/L SM21-22 6200B0.25 Client ID:Lab ID: Analyte Results/Qual RL Units Method 20C1270-06MW-2 DL Diisopropyl Ether (DIPE)6.6 0.50 g/L SM21-22 6200B0.17 Methyl tert-Butyl Ether (MTBE)100 0.50 g/L SM21-22 6200B0.25 Client ID:Lab ID: Analyte Results/Qual RL Units Method 20C1270-07MW-8 DL Methyl tert-Butyl Ether (MTBE)4.5 0.50 g/L SM21-22 6200B0.25 Client ID:Lab ID: Analyte Results/Qual RL Units Method 20C1270-08MW-11 DL Methyl tert-Butyl Ether (MTBE)5.1 0.50 g/L SM21-22 6200B0.25 Client ID:Lab ID: Analyte Results/Qual RL Units Method 20C1270-09MW-7 DL 1,2,4-Trimethylbenzene 0.75 1.0 g/L SM21-22 6200BJ0.18 Benzene 6.8 0.50 g/L SM21-22 6200B0.18 Ethylbenzene 1.2 0.50 g/L SM21-22 6200B0.13 m+p Xylene 4.0 1.0 g/L SM21-22 6200B0.30 Methyl tert-Butyl Ether (MTBE)6.4 0.50 g/L SM21-22 6200B0.25 n-Propylbenzene 0.90 0.50 g/L SM21-22 6200B0.13 o-Xylene 1.8 0.50 g/L SM21-22 6200B0.17 Toluene 13 0.50 g/L SM21-22 6200B0.14 Page 5 of 49 Table of Contents 39 Spruce Street * East Longmeadow, MA 01028 * FAX 413/525-6405 * TEL. 413/525-2332 Client ID:Lab ID: Analyte Results/Qual RL Units Method 20C1270-10MW-12 DL 1,2,4-Trimethylbenzene 230 50 g/L SM21-22 6200B9.0 1,3,5-Trimethylbenzene 120 25 g/L SM21-22 6200B7.0 2-Butanone (MEK)940 250 g/L SM21-22 6200B97 2-Hexanone (MBK)220 250 g/L SM21-22 6200BJ76 Acetone 960 2500 g/L SM21-22 6200BJ190 Benzene 3700 25 g/L SM21-22 6200B9.0 Diisopropyl Ether (DIPE)290 25 g/L SM21-22 6200B8.5 Ethylbenzene 370 25 g/L SM21-22 6200B6.5 m+p Xylene 1000 50 g/L SM21-22 6200B15 Methyl tert-Butyl Ether (MTBE)2900 25 g/L SM21-22 6200B12 Naphthalene 300 25 g/L SM21-22 6200B16 n-Propylbenzene 61 25 g/L SM21-22 6200B6.5 o-Xylene 380 25 g/L SM21-22 6200B8.5 Toluene 1200 25 g/L SM21-22 6200B7.0 Client ID:Lab ID: Analyte Results/Qual RL Units Method 20C1270-11MW-4 DL 1,2,4-Trimethylbenzene 67 5.0 g/L SM21-22 6200B0.90 1,3,5-Trimethylbenzene 35 2.5 g/L SM21-22 6200B0.70 Acetone 24 250 g/L SM21-22 6200BJ19 Benzene 1500 50 g/L SM21-22 6200B18 Diisopropyl Ether (DIPE)65 2.5 g/L SM21-22 6200B0.85 Ethylbenzene 120 2.5 g/L SM21-22 6200B0.65 Isopropylbenzene (Cumene)10 10 g/L SM21-22 6200B0.85 m+p Xylene 380 5.0 g/L SM21-22 6200B1.5 Methyl tert-Butyl Ether (MTBE)590 2.5 g/L SM21-22 6200B1.2 Naphthalene 28 2.5 g/L SM21-22 6200B1.6 n-Butylbenzene 3.3 2.5 g/L SM21-22 6200B1.0 n-Propylbenzene 12 2.5 g/L SM21-22 6200B0.65 o-Xylene 70 2.5 g/L SM21-22 6200B0.85 Toluene 49 2.5 g/L SM21-22 6200B0.70 Client ID:Lab ID: Analyte Results/Qual RL Units Method 20C1270-12MW-3 DL 1,2,4-Trimethylbenzene 3700 500 g/L SM21-22 6200B90 1,3,5-Trimethylbenzene 1300 250 g/L SM21-22 6200B70 2-Butanone (MEK)2000 2500 g/L SM21-22 6200BJ970 Acetone 5100 25000 g/L SM21-22 6200BJ1900 Benzene 48000 250 g/L SM21-22 6200B90 Diisopropyl Ether (DIPE)200 250 g/L SM21-22 6200BJ85 Ethylbenzene 4100 250 g/L SM21-22 6200B65 Isopropylbenzene (Cumene)700 1000 g/L SM21-22 6200BJ85 m+p Xylene 15000 500 g/L SM21-22 6200B150 Methyl tert-Butyl Ether (MTBE)4800 250 g/L SM21-22 6200B120 Naphthalene 2800 250 g/L SM21-22 6200B160 n-Butylbenzene 240 250 g/L SM21-22 6200BJ100 n-Propylbenzene 820 250 g/L SM21-22 6200B65 o-Xylene 6500 250 g/L SM21-22 6200B85 Toluene 55000 250 g/L SM21-22 6200B70 Con-Test does not accept liability for the consequences of any actions taken solely on the basis of the information provided in the Executive Summary section of this report. Users must review this report in its entirety to determine data usability and assessment. Page 6 of 49 Table of Contents 39 Spruce Street * East Longmeadow, MA 01028 * FAX 413/525-6405 * TEL. 413/525-2332 CASE NARRATIVE SUMMARY All reported results are within defined laboratory quality control objectives unless listed below or otherwise qualified in this report. For method 6200B elevated reporting limit for samples 20C1270-10,11+12 due to high concentrations of target compounds. [TOC_1]Case Narrative[TOC] SM21-22 6200B Qualifications: Elevated reporting limit due to high concentration of target compounds. Analyte & Samples(s) Qualified: RL-11 20C1270-10[MW-12], 20C1270-11[MW-4], 20C1270-12[MW-3] The results of analyses reported only relate to samples submitted to the Con-Test Analytical Laboratory for testing. I certify that the analyses listed above, unless specifically listed as subcontracted, if any, were performed under my direction according to the approved methodologies listed in this document, and that based upon my inquiry of those individuals immediately responsible for obtaining the information, the material contained in this report is, to the best of my knowledge and belief, accurate and complete. Tod E. Kopyscinski Laboratory Director Page 7 of 49 Table of Contents 39 Spruce Street * East Longmeadow, MA 01028 * FAX 413/525-6405 * TEL. 413/525-2332 Date Received: 3/26/2020 Work Order: 20C1270Sample Description:Project Location: Chapel Hill, NC Sample ID: 20C1270-01 Field Sample #: MW-10 Sample Matrix: Ground Water Sampled: 3/26/2020 12:35 [TOC_2]20C1270-01[TOC] AnalystAnalyzedDilutionFlag/QualRLResultsAnalyte Date/Time DL Units Date PreparedMethod Volatile Organic Compounds by GC/MS ND 50 3/30/20 12:02 MFFg/L3.8 3/30/20SM21-22 6200B1Acetone ND 0.50 3/30/20 12:02 MFFg/L0.18 3/30/20SM21-22 6200B1Benzene ND 0.50 3/30/20 12:02 MFFg/L0.15 3/30/20SM21-22 6200B1Bromobenzene ND 0.50 3/30/20 12:02 MFFg/L0.32 3/30/20SM21-22 6200B1Bromochloromethane ND 0.50 3/30/20 12:02 MFFg/L0.16 3/30/20SM21-22 6200B1Bromodichloromethane ND 0.50 3/30/20 12:02 MFFg/L0.46 3/30/20SM21-22 6200B1Bromoform ND 2.0 3/30/20 12:02 MFFg/L0.78 3/30/20SM21-22 6200B1Bromomethane ND 5.0 3/30/20 12:02 MFFg/L1.9 3/30/20SM21-22 6200B12-Butanone (MEK) ND 0.50 3/30/20 12:02 MFFg/L0.21 3/30/20SM21-22 6200B1n-Butylbenzene ND 0.50 3/30/20 12:02 MFFg/L0.16 3/30/20SM21-22 6200B1sec-Butylbenzene ND 0.50 3/30/20 12:02 MFFg/L0.17 3/30/20SM21-22 6200B1tert-Butylbenzene ND 0.50 3/30/20 12:02 MFFg/L0.11 3/30/20SM21-22 6200B1Carbon Tetrachloride ND 0.50 3/30/20 12:02 MFFg/L0.15 3/30/20SM21-22 6200B1Chlorobenzene ND 50 3/30/20 12:02 MFFg/L11 3/30/20SM21-22 6200B1Ethanol ND 0.50 3/30/20 12:02 MFFg/L0.21 3/30/20SM21-22 6200B1Chlorodibromomethane ND 0.50 3/30/20 12:02 MFFg/L0.35 3/30/20SM21-22 6200B1Chloroethane 7.0 1.0 3/30/20 12:02 MFFg/L0.17 3/30/20SM21-22 6200B1Chloroform ND 0.60 3/30/20 12:02 MFFg/L0.45 3/30/20SM21-22 6200B1Chloromethane ND 0.50 3/30/20 12:02 MFFg/L0.12 3/30/20SM21-22 6200B12-Chlorotoluene ND 0.50 3/30/20 12:02 MFFg/L0.14 3/30/20SM21-22 6200B14-Chlorotoluene ND 0.50 3/30/20 12:02 MFFg/L0.19 3/30/20SM21-22 6200B11,2-Dibromoethane (EDB) ND 0.50 3/30/20 12:02 MFFg/L0.16 3/30/20SM21-22 6200B11,2-Dichlorobenzene ND 0.50 3/30/20 12:02 MFFg/L0.12 3/30/20SM21-22 6200B11,3-Dichlorobenzene ND 0.50 3/30/20 12:02 MFFg/L0.13 3/30/20SM21-22 6200B11,4-Dichlorobenzene ND 0.50 3/30/20 12:02 MFFg/L0.26 3/30/20SM21-22 6200B1Dichlorodifluoromethane (Freon 12) ND 0.50 3/30/20 12:02 MFFg/L0.16 3/30/20SM21-22 6200B11,1-Dichloroethane ND 0.50 3/30/20 12:02 MFFg/L0.41 3/30/20SM21-22 6200B11,2-Dichloroethane ND 0.50 3/30/20 12:02 MFFg/L0.32 3/30/20SM21-22 6200B11,1-Dichloroethylene ND 0.50 3/30/20 12:02 MFFg/L0.13 3/30/20SM21-22 6200B1cis-1,2-Dichloroethylene ND 0.50 3/30/20 12:02 MFFg/L0.31 3/30/20SM21-22 6200B1trans-1,2-Dichloroethylene ND 0.50 3/30/20 12:02 MFFg/L0.20 3/30/20SM21-22 6200B11,2-Dichloropropane ND 0.50 3/30/20 12:02 MFFg/L0.11 3/30/20SM21-22 6200B11,3-Dichloropropane ND 0.50 3/30/20 12:02 MFFg/L0.20 3/30/20SM21-22 6200B12,2-Dichloropropane ND 0.50 3/30/20 12:02 MFFg/L0.16 3/30/20SM21-22 6200B11,1-Dichloropropene ND 0.50 3/30/20 12:02 MFFg/L0.13 3/30/20SM21-22 6200B1cis-1,3-Dichloropropene ND 0.50 3/30/20 12:02 MFFg/L0.23 3/30/20SM21-22 6200B1trans-1,3-Dichloropropene ND 0.50 3/30/20 12:02 MFFg/L0.17 3/30/20SM21-22 6200B1Diisopropyl Ether (DIPE) ND 0.50 3/30/20 12:02 MFFg/L0.13 3/30/20SM21-22 6200B1Ethylbenzene ND 5.0 3/30/20 12:02 MFFg/L1.5 3/30/20SM21-22 6200B12-Hexanone (MBK) ND 2.0 3/30/20 12:02 MFFg/L0.17 3/30/20SM21-22 6200B1Isopropylbenzene (Cumene) ND 0.50 3/30/20 12:02 MFFg/L0.20 3/30/20SM21-22 6200B1p-Isopropyltoluene (p-Cymene) ND 0.50 3/30/20 12:02 MFFg/L0.25 3/30/20SM21-22 6200B1Methyl tert-Butyl Ether (MTBE) ND 5.0 3/30/20 12:02 MFFg/L0.34 3/30/20SM21-22 6200B1Methylene Chloride ND 5.0 3/30/20 12:02 MFFg/L1.7 3/30/20SM21-22 6200B14-Methyl-2-pentanone (MIBK) [TOC_1]Sample Results[TOC] Page 8 of 49 Table of Contents 39 Spruce Street * East Longmeadow, MA 01028 * FAX 413/525-6405 * TEL. 413/525-2332 Date Received: 3/26/2020 Work Order: 20C1270Sample Description:Project Location: Chapel Hill, NC Sample ID: 20C1270-01 Field Sample #: MW-10 Sample Matrix: Ground Water Sampled: 3/26/2020 12:35 AnalystAnalyzedDilutionFlag/QualRLResultsAnalyte Date/Time DL Units Date PreparedMethod Volatile Organic Compounds by GC/MS ND 0.50 3/30/20 12:02 MFFg/L0.31 3/30/20SM21-22 6200B1Naphthalene ND 0.50 3/30/20 12:02 MFFg/L0.13 3/30/20SM21-22 6200B1n-Propylbenzene ND 0.50 3/30/20 12:02 MFFg/L0.11 3/30/20SM21-22 6200B1Styrene ND 0.50 3/30/20 12:02 MFFg/L0.22 3/30/20SM21-22 6200B11,1,2,2-Tetrachloroethane ND 0.50 3/30/20 12:02 MFFg/L0.18 3/30/20SM21-22 6200B1Tetrachloroethylene ND 0.50 3/30/20 12:02 MFFg/L0.14 3/30/20SM21-22 6200B1Toluene ND 1.0 3/30/20 12:02 MFFg/L0.57 3/30/20SM21-22 6200B11,2,3-Trichlorobenzene ND 1.0 3/30/20 12:02 MFFg/L0.40 3/30/20SM21-22 6200B11,2,4-Trichlorobenzene ND 0.50 3/30/20 12:02 MFFg/L0.20 3/30/20SM21-22 6200B11,1,1-Trichloroethane ND 0.50 3/30/20 12:02 MFFg/L0.16 3/30/20SM21-22 6200B11,1,2-Trichloroethane ND 0.50 3/30/20 12:02 MFFg/L0.24 3/30/20SM21-22 6200B1Trichloroethylene ND 0.50 3/30/20 12:02 MFFg/L0.33 3/30/20SM21-22 6200B1Trichlorofluoromethane (Freon 11) ND 0.50 3/30/20 12:02 MFFg/L0.25 3/30/20SM21-22 6200B11,2,3-Trichloropropane ND 1.0 3/30/20 12:02 MFFg/L0.18 3/30/20SM21-22 6200B11,2,4-Trimethylbenzene ND 0.50 3/30/20 12:02 MFFg/L0.14 3/30/20SM21-22 6200B11,3,5-Trimethylbenzene ND 20 3/30/20 12:02 MFFg/L10 3/30/20SM21-22 6200B1Vinyl Acetate ND 0.50 3/30/20 12:02 MFFg/L0.45 3/30/20SM21-22 6200B1Vinyl Chloride ND 1.0 3/30/20 12:02 MFFg/L0.30 3/30/20SM21-22 6200B1m+p Xylene ND 0.50 3/30/20 12:02 MFFg/L0.17 3/30/20SM21-22 6200B1o-Xylene Surrogates % Recovery Recovery Limits Flag/Qual 1,2-Dichloroethane-d4 112 3/30/20 12:0270-130 Toluene-d8 93.6 3/30/20 12:0270-130 4-Bromofluorobenzene 86.8 3/30/20 12:0270-130 Page 9 of 49 Table of Contents 39 Spruce Street * East Longmeadow, MA 01028 * FAX 413/525-6405 * TEL. 413/525-2332 Date Received: 3/26/2020 Work Order: 20C1270Sample Description:Project Location: Chapel Hill, NC Sample ID: 20C1270-02 Field Sample #: MW-9 Sample Matrix: Ground Water Sampled: 3/26/2020 12:40 [TOC_2]20C1270-02[TOC] AnalystAnalyzedDilutionFlag/QualRLResultsAnalyte Date/Time DL Units Date PreparedMethod Volatile Organic Compounds by GC/MS 6.5 50 3/30/20 12:26 MFFg/L3.8 3/30/20SM21-22 6200B1JAcetone ND 0.50 3/30/20 12:26 MFFg/L0.18 3/30/20SM21-22 6200B1Benzene ND 0.50 3/30/20 12:26 MFFg/L0.15 3/30/20SM21-22 6200B1Bromobenzene ND 0.50 3/30/20 12:26 MFFg/L0.32 3/30/20SM21-22 6200B1Bromochloromethane ND 0.50 3/30/20 12:26 MFFg/L0.16 3/30/20SM21-22 6200B1Bromodichloromethane ND 0.50 3/30/20 12:26 MFFg/L0.46 3/30/20SM21-22 6200B1Bromoform ND 2.0 3/30/20 12:26 MFFg/L0.78 3/30/20SM21-22 6200B1Bromomethane ND 5.0 3/30/20 12:26 MFFg/L1.9 3/30/20SM21-22 6200B12-Butanone (MEK) ND 0.50 3/30/20 12:26 MFFg/L0.21 3/30/20SM21-22 6200B1n-Butylbenzene ND 0.50 3/30/20 12:26 MFFg/L0.16 3/30/20SM21-22 6200B1sec-Butylbenzene ND 0.50 3/30/20 12:26 MFFg/L0.17 3/30/20SM21-22 6200B1tert-Butylbenzene ND 0.50 3/30/20 12:26 MFFg/L0.11 3/30/20SM21-22 6200B1Carbon Tetrachloride ND 0.50 3/30/20 12:26 MFFg/L0.15 3/30/20SM21-22 6200B1Chlorobenzene ND 50 3/30/20 12:26 MFFg/L11 3/30/20SM21-22 6200B1Ethanol ND 0.50 3/30/20 12:26 MFFg/L0.21 3/30/20SM21-22 6200B1Chlorodibromomethane ND 0.50 3/30/20 12:26 MFFg/L0.35 3/30/20SM21-22 6200B1Chloroethane ND 1.0 3/30/20 12:26 MFFg/L0.17 3/30/20SM21-22 6200B1Chloroform ND 0.60 3/30/20 12:26 MFFg/L0.45 3/30/20SM21-22 6200B1Chloromethane ND 0.50 3/30/20 12:26 MFFg/L0.12 3/30/20SM21-22 6200B12-Chlorotoluene ND 0.50 3/30/20 12:26 MFFg/L0.14 3/30/20SM21-22 6200B14-Chlorotoluene ND 0.50 3/30/20 12:26 MFFg/L0.19 3/30/20SM21-22 6200B11,2-Dibromoethane (EDB) ND 0.50 3/30/20 12:26 MFFg/L0.16 3/30/20SM21-22 6200B11,2-Dichlorobenzene ND 0.50 3/30/20 12:26 MFFg/L0.12 3/30/20SM21-22 6200B11,3-Dichlorobenzene ND 0.50 3/30/20 12:26 MFFg/L0.13 3/30/20SM21-22 6200B11,4-Dichlorobenzene ND 0.50 3/30/20 12:26 MFFg/L0.26 3/30/20SM21-22 6200B1Dichlorodifluoromethane (Freon 12) ND 0.50 3/30/20 12:26 MFFg/L0.16 3/30/20SM21-22 6200B11,1-Dichloroethane ND 0.50 3/30/20 12:26 MFFg/L0.41 3/30/20SM21-22 6200B11,2-Dichloroethane ND 0.50 3/30/20 12:26 MFFg/L0.32 3/30/20SM21-22 6200B11,1-Dichloroethylene ND 0.50 3/30/20 12:26 MFFg/L0.13 3/30/20SM21-22 6200B1cis-1,2-Dichloroethylene ND 0.50 3/30/20 12:26 MFFg/L0.31 3/30/20SM21-22 6200B1trans-1,2-Dichloroethylene ND 0.50 3/30/20 12:26 MFFg/L0.20 3/30/20SM21-22 6200B11,2-Dichloropropane ND 0.50 3/30/20 12:26 MFFg/L0.11 3/30/20SM21-22 6200B11,3-Dichloropropane ND 0.50 3/30/20 12:26 MFFg/L0.20 3/30/20SM21-22 6200B12,2-Dichloropropane ND 0.50 3/30/20 12:26 MFFg/L0.16 3/30/20SM21-22 6200B11,1-Dichloropropene ND 0.50 3/30/20 12:26 MFFg/L0.13 3/30/20SM21-22 6200B1cis-1,3-Dichloropropene ND 0.50 3/30/20 12:26 MFFg/L0.23 3/30/20SM21-22 6200B1trans-1,3-Dichloropropene ND 0.50 3/30/20 12:26 MFFg/L0.17 3/30/20SM21-22 6200B1Diisopropyl Ether (DIPE) ND 0.50 3/30/20 12:26 MFFg/L0.13 3/30/20SM21-22 6200B1Ethylbenzene ND 5.0 3/30/20 12:26 MFFg/L1.5 3/30/20SM21-22 6200B12-Hexanone (MBK) ND 2.0 3/30/20 12:26 MFFg/L0.17 3/30/20SM21-22 6200B1Isopropylbenzene (Cumene) ND 0.50 3/30/20 12:26 MFFg/L0.20 3/30/20SM21-22 6200B1p-Isopropyltoluene (p-Cymene) 21 0.50 3/30/20 12:26 MFFg/L0.25 3/30/20SM21-22 6200B1Methyl tert-Butyl Ether (MTBE) ND 5.0 3/30/20 12:26 MFFg/L0.34 3/30/20SM21-22 6200B1Methylene Chloride ND 5.0 3/30/20 12:26 MFFg/L1.7 3/30/20SM21-22 6200B14-Methyl-2-pentanone (MIBK) Page 10 of 49 Table of Contents 39 Spruce Street * East Longmeadow, MA 01028 * FAX 413/525-6405 * TEL. 413/525-2332 Date Received: 3/26/2020 Work Order: 20C1270Sample Description:Project Location: Chapel Hill, NC Sample ID: 20C1270-02 Field Sample #: MW-9 Sample Matrix: Ground Water Sampled: 3/26/2020 12:40 AnalystAnalyzedDilutionFlag/QualRLResultsAnalyte Date/Time DL Units Date PreparedMethod Volatile Organic Compounds by GC/MS ND 0.50 3/30/20 12:26 MFFg/L0.31 3/30/20SM21-22 6200B1Naphthalene ND 0.50 3/30/20 12:26 MFFg/L0.13 3/30/20SM21-22 6200B1n-Propylbenzene ND 0.50 3/30/20 12:26 MFFg/L0.11 3/30/20SM21-22 6200B1Styrene ND 0.50 3/30/20 12:26 MFFg/L0.22 3/30/20SM21-22 6200B11,1,2,2-Tetrachloroethane ND 0.50 3/30/20 12:26 MFFg/L0.18 3/30/20SM21-22 6200B1Tetrachloroethylene ND 0.50 3/30/20 12:26 MFFg/L0.14 3/30/20SM21-22 6200B1Toluene ND 1.0 3/30/20 12:26 MFFg/L0.57 3/30/20SM21-22 6200B11,2,3-Trichlorobenzene ND 1.0 3/30/20 12:26 MFFg/L0.40 3/30/20SM21-22 6200B11,2,4-Trichlorobenzene ND 0.50 3/30/20 12:26 MFFg/L0.20 3/30/20SM21-22 6200B11,1,1-Trichloroethane ND 0.50 3/30/20 12:26 MFFg/L0.16 3/30/20SM21-22 6200B11,1,2-Trichloroethane ND 0.50 3/30/20 12:26 MFFg/L0.24 3/30/20SM21-22 6200B1Trichloroethylene ND 0.50 3/30/20 12:26 MFFg/L0.33 3/30/20SM21-22 6200B1Trichlorofluoromethane (Freon 11) ND 0.50 3/30/20 12:26 MFFg/L0.25 3/30/20SM21-22 6200B11,2,3-Trichloropropane ND 1.0 3/30/20 12:26 MFFg/L0.18 3/30/20SM21-22 6200B11,2,4-Trimethylbenzene ND 0.50 3/30/20 12:26 MFFg/L0.14 3/30/20SM21-22 6200B11,3,5-Trimethylbenzene ND 20 3/30/20 12:26 MFFg/L10 3/30/20SM21-22 6200B1Vinyl Acetate ND 0.50 3/30/20 12:26 MFFg/L0.45 3/30/20SM21-22 6200B1Vinyl Chloride ND 1.0 3/30/20 12:26 MFFg/L0.30 3/30/20SM21-22 6200B1m+p Xylene ND 0.50 3/30/20 12:26 MFFg/L0.17 3/30/20SM21-22 6200B1o-Xylene Surrogates % Recovery Recovery Limits Flag/Qual 1,2-Dichloroethane-d4 116 3/30/20 12:2670-130 Toluene-d8 95.7 3/30/20 12:2670-130 4-Bromofluorobenzene 86.6 3/30/20 12:2670-130 Page 11 of 49 Table of Contents 39 Spruce Street * East Longmeadow, MA 01028 * FAX 413/525-6405 * TEL. 413/525-2332 Date Received: 3/26/2020 Work Order: 20C1270Sample Description:Project Location: Chapel Hill, NC Sample ID: 20C1270-03 Field Sample #: MW-6 Sample Matrix: Ground Water Sampled: 3/26/2020 12:48 [TOC_2]20C1270-03[TOC] AnalystAnalyzedDilutionFlag/QualRLResultsAnalyte Date/Time DL Units Date PreparedMethod Volatile Organic Compounds by GC/MS ND 50 3/30/20 12:49 MFFg/L3.8 3/30/20SM21-22 6200B1Acetone ND 0.50 3/30/20 12:49 MFFg/L0.18 3/30/20SM21-22 6200B1Benzene ND 0.50 3/30/20 12:49 MFFg/L0.15 3/30/20SM21-22 6200B1Bromobenzene ND 0.50 3/30/20 12:49 MFFg/L0.32 3/30/20SM21-22 6200B1Bromochloromethane ND 0.50 3/30/20 12:49 MFFg/L0.16 3/30/20SM21-22 6200B1Bromodichloromethane ND 0.50 3/30/20 12:49 MFFg/L0.46 3/30/20SM21-22 6200B1Bromoform ND 2.0 3/30/20 12:49 MFFg/L0.78 3/30/20SM21-22 6200B1Bromomethane ND 5.0 3/30/20 12:49 MFFg/L1.9 3/30/20SM21-22 6200B12-Butanone (MEK) ND 0.50 3/30/20 12:49 MFFg/L0.21 3/30/20SM21-22 6200B1n-Butylbenzene ND 0.50 3/30/20 12:49 MFFg/L0.16 3/30/20SM21-22 6200B1sec-Butylbenzene ND 0.50 3/30/20 12:49 MFFg/L0.17 3/30/20SM21-22 6200B1tert-Butylbenzene ND 0.50 3/30/20 12:49 MFFg/L0.11 3/30/20SM21-22 6200B1Carbon Tetrachloride ND 0.50 3/30/20 12:49 MFFg/L0.15 3/30/20SM21-22 6200B1Chlorobenzene ND 50 3/30/20 12:49 MFFg/L11 3/30/20SM21-22 6200B1Ethanol ND 0.50 3/30/20 12:49 MFFg/L0.21 3/30/20SM21-22 6200B1Chlorodibromomethane ND 0.50 3/30/20 12:49 MFFg/L0.35 3/30/20SM21-22 6200B1Chloroethane ND 1.0 3/30/20 12:49 MFFg/L0.17 3/30/20SM21-22 6200B1Chloroform ND 0.60 3/30/20 12:49 MFFg/L0.45 3/30/20SM21-22 6200B1Chloromethane ND 0.50 3/30/20 12:49 MFFg/L0.12 3/30/20SM21-22 6200B12-Chlorotoluene ND 0.50 3/30/20 12:49 MFFg/L0.14 3/30/20SM21-22 6200B14-Chlorotoluene ND 0.50 3/30/20 12:49 MFFg/L0.19 3/30/20SM21-22 6200B11,2-Dibromoethane (EDB) ND 0.50 3/30/20 12:49 MFFg/L0.16 3/30/20SM21-22 6200B11,2-Dichlorobenzene ND 0.50 3/30/20 12:49 MFFg/L0.12 3/30/20SM21-22 6200B11,3-Dichlorobenzene ND 0.50 3/30/20 12:49 MFFg/L0.13 3/30/20SM21-22 6200B11,4-Dichlorobenzene ND 0.50 3/30/20 12:49 MFFg/L0.26 3/30/20SM21-22 6200B1Dichlorodifluoromethane (Freon 12) ND 0.50 3/30/20 12:49 MFFg/L0.16 3/30/20SM21-22 6200B11,1-Dichloroethane ND 0.50 3/30/20 12:49 MFFg/L0.41 3/30/20SM21-22 6200B11,2-Dichloroethane ND 0.50 3/30/20 12:49 MFFg/L0.32 3/30/20SM21-22 6200B11,1-Dichloroethylene ND 0.50 3/30/20 12:49 MFFg/L0.13 3/30/20SM21-22 6200B1cis-1,2-Dichloroethylene ND 0.50 3/30/20 12:49 MFFg/L0.31 3/30/20SM21-22 6200B1trans-1,2-Dichloroethylene ND 0.50 3/30/20 12:49 MFFg/L0.20 3/30/20SM21-22 6200B11,2-Dichloropropane ND 0.50 3/30/20 12:49 MFFg/L0.11 3/30/20SM21-22 6200B11,3-Dichloropropane ND 0.50 3/30/20 12:49 MFFg/L0.20 3/30/20SM21-22 6200B12,2-Dichloropropane ND 0.50 3/30/20 12:49 MFFg/L0.16 3/30/20SM21-22 6200B11,1-Dichloropropene ND 0.50 3/30/20 12:49 MFFg/L0.13 3/30/20SM21-22 6200B1cis-1,3-Dichloropropene ND 0.50 3/30/20 12:49 MFFg/L0.23 3/30/20SM21-22 6200B1trans-1,3-Dichloropropene ND 0.50 3/30/20 12:49 MFFg/L0.17 3/30/20SM21-22 6200B1Diisopropyl Ether (DIPE) ND 0.50 3/30/20 12:49 MFFg/L0.13 3/30/20SM21-22 6200B1Ethylbenzene ND 5.0 3/30/20 12:49 MFFg/L1.5 3/30/20SM21-22 6200B12-Hexanone (MBK) ND 2.0 3/30/20 12:49 MFFg/L0.17 3/30/20SM21-22 6200B1Isopropylbenzene (Cumene) ND 0.50 3/30/20 12:49 MFFg/L0.20 3/30/20SM21-22 6200B1p-Isopropyltoluene (p-Cymene) ND 0.50 3/30/20 12:49 MFFg/L0.25 3/30/20SM21-22 6200B1Methyl tert-Butyl Ether (MTBE) ND 5.0 3/30/20 12:49 MFFg/L0.34 3/30/20SM21-22 6200B1Methylene Chloride ND 5.0 3/30/20 12:49 MFFg/L1.7 3/30/20SM21-22 6200B14-Methyl-2-pentanone (MIBK) Page 12 of 49 Table of Contents 39 Spruce Street * East Longmeadow, MA 01028 * FAX 413/525-6405 * TEL. 413/525-2332 Date Received: 3/26/2020 Work Order: 20C1270Sample Description:Project Location: Chapel Hill, NC Sample ID: 20C1270-03 Field Sample #: MW-6 Sample Matrix: Ground Water Sampled: 3/26/2020 12:48 AnalystAnalyzedDilutionFlag/QualRLResultsAnalyte Date/Time DL Units Date PreparedMethod Volatile Organic Compounds by GC/MS ND 0.50 3/30/20 12:49 MFFg/L0.31 3/30/20SM21-22 6200B1Naphthalene ND 0.50 3/30/20 12:49 MFFg/L0.13 3/30/20SM21-22 6200B1n-Propylbenzene ND 0.50 3/30/20 12:49 MFFg/L0.11 3/30/20SM21-22 6200B1Styrene ND 0.50 3/30/20 12:49 MFFg/L0.22 3/30/20SM21-22 6200B11,1,2,2-Tetrachloroethane ND 0.50 3/30/20 12:49 MFFg/L0.18 3/30/20SM21-22 6200B1Tetrachloroethylene ND 0.50 3/30/20 12:49 MFFg/L0.14 3/30/20SM21-22 6200B1Toluene ND 1.0 3/30/20 12:49 MFFg/L0.57 3/30/20SM21-22 6200B11,2,3-Trichlorobenzene ND 1.0 3/30/20 12:49 MFFg/L0.40 3/30/20SM21-22 6200B11,2,4-Trichlorobenzene ND 0.50 3/30/20 12:49 MFFg/L0.20 3/30/20SM21-22 6200B11,1,1-Trichloroethane ND 0.50 3/30/20 12:49 MFFg/L0.16 3/30/20SM21-22 6200B11,1,2-Trichloroethane ND 0.50 3/30/20 12:49 MFFg/L0.24 3/30/20SM21-22 6200B1Trichloroethylene ND 0.50 3/30/20 12:49 MFFg/L0.33 3/30/20SM21-22 6200B1Trichlorofluoromethane (Freon 11) ND 0.50 3/30/20 12:49 MFFg/L0.25 3/30/20SM21-22 6200B11,2,3-Trichloropropane ND 1.0 3/30/20 12:49 MFFg/L0.18 3/30/20SM21-22 6200B11,2,4-Trimethylbenzene ND 0.50 3/30/20 12:49 MFFg/L0.14 3/30/20SM21-22 6200B11,3,5-Trimethylbenzene ND 20 3/30/20 12:49 MFFg/L10 3/30/20SM21-22 6200B1Vinyl Acetate ND 0.50 3/30/20 12:49 MFFg/L0.45 3/30/20SM21-22 6200B1Vinyl Chloride ND 1.0 3/30/20 12:49 MFFg/L0.30 3/30/20SM21-22 6200B1m+p Xylene ND 0.50 3/30/20 12:49 MFFg/L0.17 3/30/20SM21-22 6200B1o-Xylene Surrogates % Recovery Recovery Limits Flag/Qual 1,2-Dichloroethane-d4 116 3/30/20 12:4970-130 Toluene-d8 94.5 3/30/20 12:4970-130 4-Bromofluorobenzene 84.8 3/30/20 12:4970-130 Page 13 of 49 Table of Contents 39 Spruce Street * East Longmeadow, MA 01028 * FAX 413/525-6405 * TEL. 413/525-2332 Date Received: 3/26/2020 Work Order: 20C1270Sample Description:Project Location: Chapel Hill, NC Sample ID: 20C1270-04 Field Sample #: MW-5 Sample Matrix: Ground Water Sampled: 3/26/2020 12:53 [TOC_2]20C1270-04[TOC] AnalystAnalyzedDilutionFlag/QualRLResultsAnalyte Date/Time DL Units Date PreparedMethod Volatile Organic Compounds by GC/MS 6.2 50 3/30/20 13:13 MFFg/L3.8 3/30/20SM21-22 6200B1JAcetone ND 0.50 3/30/20 13:13 MFFg/L0.18 3/30/20SM21-22 6200B1Benzene ND 0.50 3/30/20 13:13 MFFg/L0.15 3/30/20SM21-22 6200B1Bromobenzene ND 0.50 3/30/20 13:13 MFFg/L0.32 3/30/20SM21-22 6200B1Bromochloromethane ND 0.50 3/30/20 13:13 MFFg/L0.16 3/30/20SM21-22 6200B1Bromodichloromethane ND 0.50 3/30/20 13:13 MFFg/L0.46 3/30/20SM21-22 6200B1Bromoform ND 2.0 3/30/20 13:13 MFFg/L0.78 3/30/20SM21-22 6200B1Bromomethane ND 5.0 3/30/20 13:13 MFFg/L1.9 3/30/20SM21-22 6200B12-Butanone (MEK) ND 0.50 3/30/20 13:13 MFFg/L0.21 3/30/20SM21-22 6200B1n-Butylbenzene ND 0.50 3/30/20 13:13 MFFg/L0.16 3/30/20SM21-22 6200B1sec-Butylbenzene ND 0.50 3/30/20 13:13 MFFg/L0.17 3/30/20SM21-22 6200B1tert-Butylbenzene ND 0.50 3/30/20 13:13 MFFg/L0.11 3/30/20SM21-22 6200B1Carbon Tetrachloride ND 0.50 3/30/20 13:13 MFFg/L0.15 3/30/20SM21-22 6200B1Chlorobenzene ND 50 3/30/20 13:13 MFFg/L11 3/30/20SM21-22 6200B1Ethanol ND 0.50 3/30/20 13:13 MFFg/L0.21 3/30/20SM21-22 6200B1Chlorodibromomethane ND 0.50 3/30/20 13:13 MFFg/L0.35 3/30/20SM21-22 6200B1Chloroethane ND 1.0 3/30/20 13:13 MFFg/L0.17 3/30/20SM21-22 6200B1Chloroform ND 0.60 3/30/20 13:13 MFFg/L0.45 3/30/20SM21-22 6200B1Chloromethane ND 0.50 3/30/20 13:13 MFFg/L0.12 3/30/20SM21-22 6200B12-Chlorotoluene ND 0.50 3/30/20 13:13 MFFg/L0.14 3/30/20SM21-22 6200B14-Chlorotoluene ND 0.50 3/30/20 13:13 MFFg/L0.19 3/30/20SM21-22 6200B11,2-Dibromoethane (EDB) ND 0.50 3/30/20 13:13 MFFg/L0.16 3/30/20SM21-22 6200B11,2-Dichlorobenzene ND 0.50 3/30/20 13:13 MFFg/L0.12 3/30/20SM21-22 6200B11,3-Dichlorobenzene ND 0.50 3/30/20 13:13 MFFg/L0.13 3/30/20SM21-22 6200B11,4-Dichlorobenzene ND 0.50 3/30/20 13:13 MFFg/L0.26 3/30/20SM21-22 6200B1Dichlorodifluoromethane (Freon 12) ND 0.50 3/30/20 13:13 MFFg/L0.16 3/30/20SM21-22 6200B11,1-Dichloroethane ND 0.50 3/30/20 13:13 MFFg/L0.41 3/30/20SM21-22 6200B11,2-Dichloroethane ND 0.50 3/30/20 13:13 MFFg/L0.32 3/30/20SM21-22 6200B11,1-Dichloroethylene ND 0.50 3/30/20 13:13 MFFg/L0.13 3/30/20SM21-22 6200B1cis-1,2-Dichloroethylene ND 0.50 3/30/20 13:13 MFFg/L0.31 3/30/20SM21-22 6200B1trans-1,2-Dichloroethylene ND 0.50 3/30/20 13:13 MFFg/L0.20 3/30/20SM21-22 6200B11,2-Dichloropropane ND 0.50 3/30/20 13:13 MFFg/L0.11 3/30/20SM21-22 6200B11,3-Dichloropropane ND 0.50 3/30/20 13:13 MFFg/L0.20 3/30/20SM21-22 6200B12,2-Dichloropropane ND 0.50 3/30/20 13:13 MFFg/L0.16 3/30/20SM21-22 6200B11,1-Dichloropropene ND 0.50 3/30/20 13:13 MFFg/L0.13 3/30/20SM21-22 6200B1cis-1,3-Dichloropropene ND 0.50 3/30/20 13:13 MFFg/L0.23 3/30/20SM21-22 6200B1trans-1,3-Dichloropropene ND 0.50 3/30/20 13:13 MFFg/L0.17 3/30/20SM21-22 6200B1Diisopropyl Ether (DIPE) ND 0.50 3/30/20 13:13 MFFg/L0.13 3/30/20SM21-22 6200B1Ethylbenzene ND 5.0 3/30/20 13:13 MFFg/L1.5 3/30/20SM21-22 6200B12-Hexanone (MBK) ND 2.0 3/30/20 13:13 MFFg/L0.17 3/30/20SM21-22 6200B1Isopropylbenzene (Cumene) ND 0.50 3/30/20 13:13 MFFg/L0.20 3/30/20SM21-22 6200B1p-Isopropyltoluene (p-Cymene) ND 0.50 3/30/20 13:13 MFFg/L0.25 3/30/20SM21-22 6200B1Methyl tert-Butyl Ether (MTBE) ND 5.0 3/30/20 13:13 MFFg/L0.34 3/30/20SM21-22 6200B1Methylene Chloride ND 5.0 3/30/20 13:13 MFFg/L1.7 3/30/20SM21-22 6200B14-Methyl-2-pentanone (MIBK) Page 14 of 49 Table of Contents 39 Spruce Street * East Longmeadow, MA 01028 * FAX 413/525-6405 * TEL. 413/525-2332 Date Received: 3/26/2020 Work Order: 20C1270Sample Description:Project Location: Chapel Hill, NC Sample ID: 20C1270-04 Field Sample #: MW-5 Sample Matrix: Ground Water Sampled: 3/26/2020 12:53 AnalystAnalyzedDilutionFlag/QualRLResultsAnalyte Date/Time DL Units Date PreparedMethod Volatile Organic Compounds by GC/MS ND 0.50 3/30/20 13:13 MFFg/L0.31 3/30/20SM21-22 6200B1Naphthalene ND 0.50 3/30/20 13:13 MFFg/L0.13 3/30/20SM21-22 6200B1n-Propylbenzene ND 0.50 3/30/20 13:13 MFFg/L0.11 3/30/20SM21-22 6200B1Styrene ND 0.50 3/30/20 13:13 MFFg/L0.22 3/30/20SM21-22 6200B11,1,2,2-Tetrachloroethane ND 0.50 3/30/20 13:13 MFFg/L0.18 3/30/20SM21-22 6200B1Tetrachloroethylene ND 0.50 3/30/20 13:13 MFFg/L0.14 3/30/20SM21-22 6200B1Toluene ND 1.0 3/30/20 13:13 MFFg/L0.57 3/30/20SM21-22 6200B11,2,3-Trichlorobenzene ND 1.0 3/30/20 13:13 MFFg/L0.40 3/30/20SM21-22 6200B11,2,4-Trichlorobenzene ND 0.50 3/30/20 13:13 MFFg/L0.20 3/30/20SM21-22 6200B11,1,1-Trichloroethane ND 0.50 3/30/20 13:13 MFFg/L0.16 3/30/20SM21-22 6200B11,1,2-Trichloroethane ND 0.50 3/30/20 13:13 MFFg/L0.24 3/30/20SM21-22 6200B1Trichloroethylene ND 0.50 3/30/20 13:13 MFFg/L0.33 3/30/20SM21-22 6200B1Trichlorofluoromethane (Freon 11) ND 0.50 3/30/20 13:13 MFFg/L0.25 3/30/20SM21-22 6200B11,2,3-Trichloropropane ND 1.0 3/30/20 13:13 MFFg/L0.18 3/30/20SM21-22 6200B11,2,4-Trimethylbenzene ND 0.50 3/30/20 13:13 MFFg/L0.14 3/30/20SM21-22 6200B11,3,5-Trimethylbenzene ND 20 3/30/20 13:13 MFFg/L10 3/30/20SM21-22 6200B1Vinyl Acetate ND 0.50 3/30/20 13:13 MFFg/L0.45 3/30/20SM21-22 6200B1Vinyl Chloride ND 1.0 3/30/20 13:13 MFFg/L0.30 3/30/20SM21-22 6200B1m+p Xylene ND 0.50 3/30/20 13:13 MFFg/L0.17 3/30/20SM21-22 6200B1o-Xylene Surrogates % Recovery Recovery Limits Flag/Qual 1,2-Dichloroethane-d4 114 3/30/20 13:1370-130 Toluene-d8 94.3 3/30/20 13:1370-130 4-Bromofluorobenzene 89.6 3/30/20 13:1370-130 Page 15 of 49 Table of Contents 39 Spruce Street * East Longmeadow, MA 01028 * FAX 413/525-6405 * TEL. 413/525-2332 Date Received: 3/26/2020 Work Order: 20C1270Sample Description:Project Location: Chapel Hill, NC Sample ID: 20C1270-05 Field Sample #: MW-1 Sample Matrix: Ground Water Sampled: 3/26/2020 13:35 [TOC_2]20C1270-05[TOC] AnalystAnalyzedDilutionFlag/QualRLResultsAnalyte Date/Time DL Units Date PreparedMethod Volatile Organic Compounds by GC/MS 5.2 50 3/30/20 13:36 MFFg/L3.8 3/30/20SM21-22 6200B1JAcetone ND 0.50 3/30/20 13:36 MFFg/L0.18 3/30/20SM21-22 6200B1Benzene ND 0.50 3/30/20 13:36 MFFg/L0.15 3/30/20SM21-22 6200B1Bromobenzene ND 0.50 3/30/20 13:36 MFFg/L0.32 3/30/20SM21-22 6200B1Bromochloromethane ND 0.50 3/30/20 13:36 MFFg/L0.16 3/30/20SM21-22 6200B1Bromodichloromethane ND 0.50 3/30/20 13:36 MFFg/L0.46 3/30/20SM21-22 6200B1Bromoform ND 2.0 3/30/20 13:36 MFFg/L0.78 3/30/20SM21-22 6200B1Bromomethane ND 5.0 3/30/20 13:36 MFFg/L1.9 3/30/20SM21-22 6200B12-Butanone (MEK) ND 0.50 3/30/20 13:36 MFFg/L0.21 3/30/20SM21-22 6200B1n-Butylbenzene ND 0.50 3/30/20 13:36 MFFg/L0.16 3/30/20SM21-22 6200B1sec-Butylbenzene ND 0.50 3/30/20 13:36 MFFg/L0.17 3/30/20SM21-22 6200B1tert-Butylbenzene ND 0.50 3/30/20 13:36 MFFg/L0.11 3/30/20SM21-22 6200B1Carbon Tetrachloride ND 0.50 3/30/20 13:36 MFFg/L0.15 3/30/20SM21-22 6200B1Chlorobenzene ND 50 3/30/20 13:36 MFFg/L11 3/30/20SM21-22 6200B1Ethanol ND 0.50 3/30/20 13:36 MFFg/L0.21 3/30/20SM21-22 6200B1Chlorodibromomethane ND 0.50 3/30/20 13:36 MFFg/L0.35 3/30/20SM21-22 6200B1Chloroethane ND 1.0 3/30/20 13:36 MFFg/L0.17 3/30/20SM21-22 6200B1Chloroform ND 0.60 3/30/20 13:36 MFFg/L0.45 3/30/20SM21-22 6200B1Chloromethane ND 0.50 3/30/20 13:36 MFFg/L0.12 3/30/20SM21-22 6200B12-Chlorotoluene ND 0.50 3/30/20 13:36 MFFg/L0.14 3/30/20SM21-22 6200B14-Chlorotoluene ND 0.50 3/30/20 13:36 MFFg/L0.19 3/30/20SM21-22 6200B11,2-Dibromoethane (EDB) ND 0.50 3/30/20 13:36 MFFg/L0.16 3/30/20SM21-22 6200B11,2-Dichlorobenzene ND 0.50 3/30/20 13:36 MFFg/L0.12 3/30/20SM21-22 6200B11,3-Dichlorobenzene ND 0.50 3/30/20 13:36 MFFg/L0.13 3/30/20SM21-22 6200B11,4-Dichlorobenzene ND 0.50 3/30/20 13:36 MFFg/L0.26 3/30/20SM21-22 6200B1Dichlorodifluoromethane (Freon 12) ND 0.50 3/30/20 13:36 MFFg/L0.16 3/30/20SM21-22 6200B11,1-Dichloroethane ND 0.50 3/30/20 13:36 MFFg/L0.41 3/30/20SM21-22 6200B11,2-Dichloroethane ND 0.50 3/30/20 13:36 MFFg/L0.32 3/30/20SM21-22 6200B11,1-Dichloroethylene ND 0.50 3/30/20 13:36 MFFg/L0.13 3/30/20SM21-22 6200B1cis-1,2-Dichloroethylene ND 0.50 3/30/20 13:36 MFFg/L0.31 3/30/20SM21-22 6200B1trans-1,2-Dichloroethylene ND 0.50 3/30/20 13:36 MFFg/L0.20 3/30/20SM21-22 6200B11,2-Dichloropropane ND 0.50 3/30/20 13:36 MFFg/L0.11 3/30/20SM21-22 6200B11,3-Dichloropropane ND 0.50 3/30/20 13:36 MFFg/L0.20 3/30/20SM21-22 6200B12,2-Dichloropropane ND 0.50 3/30/20 13:36 MFFg/L0.16 3/30/20SM21-22 6200B11,1-Dichloropropene ND 0.50 3/30/20 13:36 MFFg/L0.13 3/30/20SM21-22 6200B1cis-1,3-Dichloropropene ND 0.50 3/30/20 13:36 MFFg/L0.23 3/30/20SM21-22 6200B1trans-1,3-Dichloropropene ND 0.50 3/30/20 13:36 MFFg/L0.17 3/30/20SM21-22 6200B1Diisopropyl Ether (DIPE) ND 0.50 3/30/20 13:36 MFFg/L0.13 3/30/20SM21-22 6200B1Ethylbenzene ND 5.0 3/30/20 13:36 MFFg/L1.5 3/30/20SM21-22 6200B12-Hexanone (MBK) ND 2.0 3/30/20 13:36 MFFg/L0.17 3/30/20SM21-22 6200B1Isopropylbenzene (Cumene) ND 0.50 3/30/20 13:36 MFFg/L0.20 3/30/20SM21-22 6200B1p-Isopropyltoluene (p-Cymene) 40 0.50 3/30/20 13:36 MFFg/L0.25 3/30/20SM21-22 6200B1Methyl tert-Butyl Ether (MTBE) ND 5.0 3/30/20 13:36 MFFg/L0.34 3/30/20SM21-22 6200B1Methylene Chloride ND 5.0 3/30/20 13:36 MFFg/L1.7 3/30/20SM21-22 6200B14-Methyl-2-pentanone (MIBK) Page 16 of 49 Table of Contents 39 Spruce Street * East Longmeadow, MA 01028 * FAX 413/525-6405 * TEL. 413/525-2332 Date Received: 3/26/2020 Work Order: 20C1270Sample Description:Project Location: Chapel Hill, NC Sample ID: 20C1270-05 Field Sample #: MW-1 Sample Matrix: Ground Water Sampled: 3/26/2020 13:35 AnalystAnalyzedDilutionFlag/QualRLResultsAnalyte Date/Time DL Units Date PreparedMethod Volatile Organic Compounds by GC/MS ND 0.50 3/30/20 13:36 MFFg/L0.31 3/30/20SM21-22 6200B1Naphthalene ND 0.50 3/30/20 13:36 MFFg/L0.13 3/30/20SM21-22 6200B1n-Propylbenzene ND 0.50 3/30/20 13:36 MFFg/L0.11 3/30/20SM21-22 6200B1Styrene ND 0.50 3/30/20 13:36 MFFg/L0.22 3/30/20SM21-22 6200B11,1,2,2-Tetrachloroethane ND 0.50 3/30/20 13:36 MFFg/L0.18 3/30/20SM21-22 6200B1Tetrachloroethylene ND 0.50 3/30/20 13:36 MFFg/L0.14 3/30/20SM21-22 6200B1Toluene ND 1.0 3/30/20 13:36 MFFg/L0.57 3/30/20SM21-22 6200B11,2,3-Trichlorobenzene ND 1.0 3/30/20 13:36 MFFg/L0.40 3/30/20SM21-22 6200B11,2,4-Trichlorobenzene ND 0.50 3/30/20 13:36 MFFg/L0.20 3/30/20SM21-22 6200B11,1,1-Trichloroethane ND 0.50 3/30/20 13:36 MFFg/L0.16 3/30/20SM21-22 6200B11,1,2-Trichloroethane ND 0.50 3/30/20 13:36 MFFg/L0.24 3/30/20SM21-22 6200B1Trichloroethylene ND 0.50 3/30/20 13:36 MFFg/L0.33 3/30/20SM21-22 6200B1Trichlorofluoromethane (Freon 11) ND 0.50 3/30/20 13:36 MFFg/L0.25 3/30/20SM21-22 6200B11,2,3-Trichloropropane ND 1.0 3/30/20 13:36 MFFg/L0.18 3/30/20SM21-22 6200B11,2,4-Trimethylbenzene ND 0.50 3/30/20 13:36 MFFg/L0.14 3/30/20SM21-22 6200B11,3,5-Trimethylbenzene ND 20 3/30/20 13:36 MFFg/L10 3/30/20SM21-22 6200B1Vinyl Acetate ND 0.50 3/30/20 13:36 MFFg/L0.45 3/30/20SM21-22 6200B1Vinyl Chloride ND 1.0 3/30/20 13:36 MFFg/L0.30 3/30/20SM21-22 6200B1m+p Xylene ND 0.50 3/30/20 13:36 MFFg/L0.17 3/30/20SM21-22 6200B1o-Xylene Surrogates % Recovery Recovery Limits Flag/Qual 1,2-Dichloroethane-d4 116 3/30/20 13:3670-130 Toluene-d8 95.6 3/30/20 13:3670-130 4-Bromofluorobenzene 87.2 3/30/20 13:3670-130 Page 17 of 49 Table of Contents 39 Spruce Street * East Longmeadow, MA 01028 * FAX 413/525-6405 * TEL. 413/525-2332 Date Received: 3/26/2020 Work Order: 20C1270Sample Description:Project Location: Chapel Hill, NC Sample ID: 20C1270-06 Field Sample #: MW-2 Sample Matrix: Ground Water Sampled: 3/26/2020 14:13 [TOC_2]20C1270-06[TOC] AnalystAnalyzedDilutionFlag/QualRLResultsAnalyte Date/Time DL Units Date PreparedMethod Volatile Organic Compounds by GC/MS ND 50 3/30/20 14:00 MFFg/L3.8 3/30/20SM21-22 6200B1Acetone ND 0.50 3/30/20 14:00 MFFg/L0.18 3/30/20SM21-22 6200B1Benzene ND 0.50 3/30/20 14:00 MFFg/L0.15 3/30/20SM21-22 6200B1Bromobenzene ND 0.50 3/30/20 14:00 MFFg/L0.32 3/30/20SM21-22 6200B1Bromochloromethane ND 0.50 3/30/20 14:00 MFFg/L0.16 3/30/20SM21-22 6200B1Bromodichloromethane ND 0.50 3/30/20 14:00 MFFg/L0.46 3/30/20SM21-22 6200B1Bromoform ND 2.0 3/30/20 14:00 MFFg/L0.78 3/30/20SM21-22 6200B1Bromomethane ND 5.0 3/30/20 14:00 MFFg/L1.9 3/30/20SM21-22 6200B12-Butanone (MEK) ND 0.50 3/30/20 14:00 MFFg/L0.21 3/30/20SM21-22 6200B1n-Butylbenzene ND 0.50 3/30/20 14:00 MFFg/L0.16 3/30/20SM21-22 6200B1sec-Butylbenzene ND 0.50 3/30/20 14:00 MFFg/L0.17 3/30/20SM21-22 6200B1tert-Butylbenzene ND 0.50 3/30/20 14:00 MFFg/L0.11 3/30/20SM21-22 6200B1Carbon Tetrachloride ND 0.50 3/30/20 14:00 MFFg/L0.15 3/30/20SM21-22 6200B1Chlorobenzene ND 50 3/30/20 14:00 MFFg/L11 3/30/20SM21-22 6200B1Ethanol ND 0.50 3/30/20 14:00 MFFg/L0.21 3/30/20SM21-22 6200B1Chlorodibromomethane ND 0.50 3/30/20 14:00 MFFg/L0.35 3/30/20SM21-22 6200B1Chloroethane ND 1.0 3/30/20 14:00 MFFg/L0.17 3/30/20SM21-22 6200B1Chloroform ND 0.60 3/30/20 14:00 MFFg/L0.45 3/30/20SM21-22 6200B1Chloromethane ND 0.50 3/30/20 14:00 MFFg/L0.12 3/30/20SM21-22 6200B12-Chlorotoluene ND 0.50 3/30/20 14:00 MFFg/L0.14 3/30/20SM21-22 6200B14-Chlorotoluene ND 0.50 3/30/20 14:00 MFFg/L0.19 3/30/20SM21-22 6200B11,2-Dibromoethane (EDB) ND 0.50 3/30/20 14:00 MFFg/L0.16 3/30/20SM21-22 6200B11,2-Dichlorobenzene ND 0.50 3/30/20 14:00 MFFg/L0.12 3/30/20SM21-22 6200B11,3-Dichlorobenzene ND 0.50 3/30/20 14:00 MFFg/L0.13 3/30/20SM21-22 6200B11,4-Dichlorobenzene ND 0.50 3/30/20 14:00 MFFg/L0.26 3/30/20SM21-22 6200B1Dichlorodifluoromethane (Freon 12) ND 0.50 3/30/20 14:00 MFFg/L0.16 3/30/20SM21-22 6200B11,1-Dichloroethane ND 0.50 3/30/20 14:00 MFFg/L0.41 3/30/20SM21-22 6200B11,2-Dichloroethane ND 0.50 3/30/20 14:00 MFFg/L0.32 3/30/20SM21-22 6200B11,1-Dichloroethylene ND 0.50 3/30/20 14:00 MFFg/L0.13 3/30/20SM21-22 6200B1cis-1,2-Dichloroethylene ND 0.50 3/30/20 14:00 MFFg/L0.31 3/30/20SM21-22 6200B1trans-1,2-Dichloroethylene ND 0.50 3/30/20 14:00 MFFg/L0.20 3/30/20SM21-22 6200B11,2-Dichloropropane ND 0.50 3/30/20 14:00 MFFg/L0.11 3/30/20SM21-22 6200B11,3-Dichloropropane ND 0.50 3/30/20 14:00 MFFg/L0.20 3/30/20SM21-22 6200B12,2-Dichloropropane ND 0.50 3/30/20 14:00 MFFg/L0.16 3/30/20SM21-22 6200B11,1-Dichloropropene ND 0.50 3/30/20 14:00 MFFg/L0.13 3/30/20SM21-22 6200B1cis-1,3-Dichloropropene ND 0.50 3/30/20 14:00 MFFg/L0.23 3/30/20SM21-22 6200B1trans-1,3-Dichloropropene 6.6 0.50 3/30/20 14:00 MFFg/L0.17 3/30/20SM21-22 6200B1Diisopropyl Ether (DIPE) ND 0.50 3/30/20 14:00 MFFg/L0.13 3/30/20SM21-22 6200B1Ethylbenzene ND 5.0 3/30/20 14:00 MFFg/L1.5 3/30/20SM21-22 6200B12-Hexanone (MBK) ND 2.0 3/30/20 14:00 MFFg/L0.17 3/30/20SM21-22 6200B1Isopropylbenzene (Cumene) ND 0.50 3/30/20 14:00 MFFg/L0.20 3/30/20SM21-22 6200B1p-Isopropyltoluene (p-Cymene) 100 0.50 3/30/20 14:00 MFFg/L0.25 3/30/20SM21-22 6200B1Methyl tert-Butyl Ether (MTBE) ND 5.0 3/30/20 14:00 MFFg/L0.34 3/30/20SM21-22 6200B1Methylene Chloride ND 5.0 3/30/20 14:00 MFFg/L1.7 3/30/20SM21-22 6200B14-Methyl-2-pentanone (MIBK) Page 18 of 49 Table of Contents 39 Spruce Street * East Longmeadow, MA 01028 * FAX 413/525-6405 * TEL. 413/525-2332 Date Received: 3/26/2020 Work Order: 20C1270Sample Description:Project Location: Chapel Hill, NC Sample ID: 20C1270-06 Field Sample #: MW-2 Sample Matrix: Ground Water Sampled: 3/26/2020 14:13 AnalystAnalyzedDilutionFlag/QualRLResultsAnalyte Date/Time DL Units Date PreparedMethod Volatile Organic Compounds by GC/MS ND 0.50 3/30/20 14:00 MFFg/L0.31 3/30/20SM21-22 6200B1Naphthalene ND 0.50 3/30/20 14:00 MFFg/L0.13 3/30/20SM21-22 6200B1n-Propylbenzene ND 0.50 3/30/20 14:00 MFFg/L0.11 3/30/20SM21-22 6200B1Styrene ND 0.50 3/30/20 14:00 MFFg/L0.22 3/30/20SM21-22 6200B11,1,2,2-Tetrachloroethane ND 0.50 3/30/20 14:00 MFFg/L0.18 3/30/20SM21-22 6200B1Tetrachloroethylene ND 0.50 3/30/20 14:00 MFFg/L0.14 3/30/20SM21-22 6200B1Toluene ND 1.0 3/30/20 14:00 MFFg/L0.57 3/30/20SM21-22 6200B11,2,3-Trichlorobenzene ND 1.0 3/30/20 14:00 MFFg/L0.40 3/30/20SM21-22 6200B11,2,4-Trichlorobenzene ND 0.50 3/30/20 14:00 MFFg/L0.20 3/30/20SM21-22 6200B11,1,1-Trichloroethane ND 0.50 3/30/20 14:00 MFFg/L0.16 3/30/20SM21-22 6200B11,1,2-Trichloroethane ND 0.50 3/30/20 14:00 MFFg/L0.24 3/30/20SM21-22 6200B1Trichloroethylene ND 0.50 3/30/20 14:00 MFFg/L0.33 3/30/20SM21-22 6200B1Trichlorofluoromethane (Freon 11) ND 0.50 3/30/20 14:00 MFFg/L0.25 3/30/20SM21-22 6200B11,2,3-Trichloropropane ND 1.0 3/30/20 14:00 MFFg/L0.18 3/30/20SM21-22 6200B11,2,4-Trimethylbenzene ND 0.50 3/30/20 14:00 MFFg/L0.14 3/30/20SM21-22 6200B11,3,5-Trimethylbenzene ND 20 3/30/20 14:00 MFFg/L10 3/30/20SM21-22 6200B1Vinyl Acetate ND 0.50 3/30/20 14:00 MFFg/L0.45 3/30/20SM21-22 6200B1Vinyl Chloride ND 1.0 3/30/20 14:00 MFFg/L0.30 3/30/20SM21-22 6200B1m+p Xylene ND 0.50 3/30/20 14:00 MFFg/L0.17 3/30/20SM21-22 6200B1o-Xylene Surrogates % Recovery Recovery Limits Flag/Qual 1,2-Dichloroethane-d4 111 3/30/20 14:0070-130 Toluene-d8 93.4 3/30/20 14:0070-130 4-Bromofluorobenzene 87.6 3/30/20 14:0070-130 Page 19 of 49 Table of Contents 39 Spruce Street * East Longmeadow, MA 01028 * FAX 413/525-6405 * TEL. 413/525-2332 Date Received: 3/26/2020 Work Order: 20C1270Sample Description:Project Location: Chapel Hill, NC Sample ID: 20C1270-07 Field Sample #: MW-8 Sample Matrix: Ground Water Sampled: 3/26/2020 14:50 [TOC_2]20C1270-07[TOC] AnalystAnalyzedDilutionFlag/QualRLResultsAnalyte Date/Time DL Units Date PreparedMethod Volatile Organic Compounds by GC/MS ND 50 3/30/20 14:23 MFFg/L3.8 3/30/20SM21-22 6200B1Acetone ND 0.50 3/30/20 14:23 MFFg/L0.18 3/30/20SM21-22 6200B1Benzene ND 0.50 3/30/20 14:23 MFFg/L0.15 3/30/20SM21-22 6200B1Bromobenzene ND 0.50 3/30/20 14:23 MFFg/L0.32 3/30/20SM21-22 6200B1Bromochloromethane ND 0.50 3/30/20 14:23 MFFg/L0.16 3/30/20SM21-22 6200B1Bromodichloromethane ND 0.50 3/30/20 14:23 MFFg/L0.46 3/30/20SM21-22 6200B1Bromoform ND 2.0 3/30/20 14:23 MFFg/L0.78 3/30/20SM21-22 6200B1Bromomethane ND 5.0 3/30/20 14:23 MFFg/L1.9 3/30/20SM21-22 6200B12-Butanone (MEK) ND 0.50 3/30/20 14:23 MFFg/L0.21 3/30/20SM21-22 6200B1n-Butylbenzene ND 0.50 3/30/20 14:23 MFFg/L0.16 3/30/20SM21-22 6200B1sec-Butylbenzene ND 0.50 3/30/20 14:23 MFFg/L0.17 3/30/20SM21-22 6200B1tert-Butylbenzene ND 0.50 3/30/20 14:23 MFFg/L0.11 3/30/20SM21-22 6200B1Carbon Tetrachloride ND 0.50 3/30/20 14:23 MFFg/L0.15 3/30/20SM21-22 6200B1Chlorobenzene ND 50 3/30/20 14:23 MFFg/L11 3/30/20SM21-22 6200B1Ethanol ND 0.50 3/30/20 14:23 MFFg/L0.21 3/30/20SM21-22 6200B1Chlorodibromomethane ND 0.50 3/30/20 14:23 MFFg/L0.35 3/30/20SM21-22 6200B1Chloroethane ND 1.0 3/30/20 14:23 MFFg/L0.17 3/30/20SM21-22 6200B1Chloroform ND 0.60 3/30/20 14:23 MFFg/L0.45 3/30/20SM21-22 6200B1Chloromethane ND 0.50 3/30/20 14:23 MFFg/L0.12 3/30/20SM21-22 6200B12-Chlorotoluene ND 0.50 3/30/20 14:23 MFFg/L0.14 3/30/20SM21-22 6200B14-Chlorotoluene ND 0.50 3/30/20 14:23 MFFg/L0.19 3/30/20SM21-22 6200B11,2-Dibromoethane (EDB) ND 0.50 3/30/20 14:23 MFFg/L0.16 3/30/20SM21-22 6200B11,2-Dichlorobenzene ND 0.50 3/30/20 14:23 MFFg/L0.12 3/30/20SM21-22 6200B11,3-Dichlorobenzene ND 0.50 3/30/20 14:23 MFFg/L0.13 3/30/20SM21-22 6200B11,4-Dichlorobenzene ND 0.50 3/30/20 14:23 MFFg/L0.26 3/30/20SM21-22 6200B1Dichlorodifluoromethane (Freon 12) ND 0.50 3/30/20 14:23 MFFg/L0.16 3/30/20SM21-22 6200B11,1-Dichloroethane ND 0.50 3/30/20 14:23 MFFg/L0.41 3/30/20SM21-22 6200B11,2-Dichloroethane ND 0.50 3/30/20 14:23 MFFg/L0.32 3/30/20SM21-22 6200B11,1-Dichloroethylene ND 0.50 3/30/20 14:23 MFFg/L0.13 3/30/20SM21-22 6200B1cis-1,2-Dichloroethylene ND 0.50 3/30/20 14:23 MFFg/L0.31 3/30/20SM21-22 6200B1trans-1,2-Dichloroethylene ND 0.50 3/30/20 14:23 MFFg/L0.20 3/30/20SM21-22 6200B11,2-Dichloropropane ND 0.50 3/30/20 14:23 MFFg/L0.11 3/30/20SM21-22 6200B11,3-Dichloropropane ND 0.50 3/30/20 14:23 MFFg/L0.20 3/30/20SM21-22 6200B12,2-Dichloropropane ND 0.50 3/30/20 14:23 MFFg/L0.16 3/30/20SM21-22 6200B11,1-Dichloropropene ND 0.50 3/30/20 14:23 MFFg/L0.13 3/30/20SM21-22 6200B1cis-1,3-Dichloropropene ND 0.50 3/30/20 14:23 MFFg/L0.23 3/30/20SM21-22 6200B1trans-1,3-Dichloropropene ND 0.50 3/30/20 14:23 MFFg/L0.17 3/30/20SM21-22 6200B1Diisopropyl Ether (DIPE) ND 0.50 3/30/20 14:23 MFFg/L0.13 3/30/20SM21-22 6200B1Ethylbenzene ND 5.0 3/30/20 14:23 MFFg/L1.5 3/30/20SM21-22 6200B12-Hexanone (MBK) ND 2.0 3/30/20 14:23 MFFg/L0.17 3/30/20SM21-22 6200B1Isopropylbenzene (Cumene) ND 0.50 3/30/20 14:23 MFFg/L0.20 3/30/20SM21-22 6200B1p-Isopropyltoluene (p-Cymene) 4.5 0.50 3/30/20 14:23 MFFg/L0.25 3/30/20SM21-22 6200B1Methyl tert-Butyl Ether (MTBE) ND 5.0 3/30/20 14:23 MFFg/L0.34 3/30/20SM21-22 6200B1Methylene Chloride ND 5.0 3/30/20 14:23 MFFg/L1.7 3/30/20SM21-22 6200B14-Methyl-2-pentanone (MIBK) Page 20 of 49 Table of Contents 39 Spruce Street * East Longmeadow, MA 01028 * FAX 413/525-6405 * TEL. 413/525-2332 Date Received: 3/26/2020 Work Order: 20C1270Sample Description:Project Location: Chapel Hill, NC Sample ID: 20C1270-07 Field Sample #: MW-8 Sample Matrix: Ground Water Sampled: 3/26/2020 14:50 AnalystAnalyzedDilutionFlag/QualRLResultsAnalyte Date/Time DL Units Date PreparedMethod Volatile Organic Compounds by GC/MS ND 0.50 3/30/20 14:23 MFFg/L0.31 3/30/20SM21-22 6200B1Naphthalene ND 0.50 3/30/20 14:23 MFFg/L0.13 3/30/20SM21-22 6200B1n-Propylbenzene ND 0.50 3/30/20 14:23 MFFg/L0.11 3/30/20SM21-22 6200B1Styrene ND 0.50 3/30/20 14:23 MFFg/L0.22 3/30/20SM21-22 6200B11,1,2,2-Tetrachloroethane ND 0.50 3/30/20 14:23 MFFg/L0.18 3/30/20SM21-22 6200B1Tetrachloroethylene ND 0.50 3/30/20 14:23 MFFg/L0.14 3/30/20SM21-22 6200B1Toluene ND 1.0 3/30/20 14:23 MFFg/L0.57 3/30/20SM21-22 6200B11,2,3-Trichlorobenzene ND 1.0 3/30/20 14:23 MFFg/L0.40 3/30/20SM21-22 6200B11,2,4-Trichlorobenzene ND 0.50 3/30/20 14:23 MFFg/L0.20 3/30/20SM21-22 6200B11,1,1-Trichloroethane ND 0.50 3/30/20 14:23 MFFg/L0.16 3/30/20SM21-22 6200B11,1,2-Trichloroethane ND 0.50 3/30/20 14:23 MFFg/L0.24 3/30/20SM21-22 6200B1Trichloroethylene ND 0.50 3/30/20 14:23 MFFg/L0.33 3/30/20SM21-22 6200B1Trichlorofluoromethane (Freon 11) ND 0.50 3/30/20 14:23 MFFg/L0.25 3/30/20SM21-22 6200B11,2,3-Trichloropropane ND 1.0 3/30/20 14:23 MFFg/L0.18 3/30/20SM21-22 6200B11,2,4-Trimethylbenzene ND 0.50 3/30/20 14:23 MFFg/L0.14 3/30/20SM21-22 6200B11,3,5-Trimethylbenzene ND 20 3/30/20 14:23 MFFg/L10 3/30/20SM21-22 6200B1Vinyl Acetate ND 0.50 3/30/20 14:23 MFFg/L0.45 3/30/20SM21-22 6200B1Vinyl Chloride ND 1.0 3/30/20 14:23 MFFg/L0.30 3/30/20SM21-22 6200B1m+p Xylene ND 0.50 3/30/20 14:23 MFFg/L0.17 3/30/20SM21-22 6200B1o-Xylene Surrogates % Recovery Recovery Limits Flag/Qual 1,2-Dichloroethane-d4 116 3/30/20 14:2370-130 Toluene-d8 95.7 3/30/20 14:2370-130 4-Bromofluorobenzene 85.5 3/30/20 14:2370-130 Page 21 of 49 Table of Contents 39 Spruce Street * East Longmeadow, MA 01028 * FAX 413/525-6405 * TEL. 413/525-2332 Date Received: 3/26/2020 Work Order: 20C1270Sample Description:Project Location: Chapel Hill, NC Sample ID: 20C1270-08 Field Sample #: MW-11 Sample Matrix: Ground Water Sampled: 3/26/2020 15:12 [TOC_2]20C1270-08[TOC] AnalystAnalyzedDilutionFlag/QualRLResultsAnalyte Date/Time DL Units Date PreparedMethod Volatile Organic Compounds by GC/MS ND 50 3/30/20 14:47 MFFg/L3.8 3/30/20SM21-22 6200B1Acetone ND 0.50 3/30/20 14:47 MFFg/L0.18 3/30/20SM21-22 6200B1Benzene ND 0.50 3/30/20 14:47 MFFg/L0.15 3/30/20SM21-22 6200B1Bromobenzene ND 0.50 3/30/20 14:47 MFFg/L0.32 3/30/20SM21-22 6200B1Bromochloromethane ND 0.50 3/30/20 14:47 MFFg/L0.16 3/30/20SM21-22 6200B1Bromodichloromethane ND 0.50 3/30/20 14:47 MFFg/L0.46 3/30/20SM21-22 6200B1Bromoform ND 2.0 3/30/20 14:47 MFFg/L0.78 3/30/20SM21-22 6200B1Bromomethane ND 5.0 3/30/20 14:47 MFFg/L1.9 3/30/20SM21-22 6200B12-Butanone (MEK) ND 0.50 3/30/20 14:47 MFFg/L0.21 3/30/20SM21-22 6200B1n-Butylbenzene ND 0.50 3/30/20 14:47 MFFg/L0.16 3/30/20SM21-22 6200B1sec-Butylbenzene ND 0.50 3/30/20 14:47 MFFg/L0.17 3/30/20SM21-22 6200B1tert-Butylbenzene ND 0.50 3/30/20 14:47 MFFg/L0.11 3/30/20SM21-22 6200B1Carbon Tetrachloride ND 0.50 3/30/20 14:47 MFFg/L0.15 3/30/20SM21-22 6200B1Chlorobenzene ND 50 3/30/20 14:47 MFFg/L11 3/30/20SM21-22 6200B1Ethanol ND 0.50 3/30/20 14:47 MFFg/L0.21 3/30/20SM21-22 6200B1Chlorodibromomethane ND 0.50 3/30/20 14:47 MFFg/L0.35 3/30/20SM21-22 6200B1Chloroethane ND 1.0 3/30/20 14:47 MFFg/L0.17 3/30/20SM21-22 6200B1Chloroform ND 0.60 3/30/20 14:47 MFFg/L0.45 3/30/20SM21-22 6200B1Chloromethane ND 0.50 3/30/20 14:47 MFFg/L0.12 3/30/20SM21-22 6200B12-Chlorotoluene ND 0.50 3/30/20 14:47 MFFg/L0.14 3/30/20SM21-22 6200B14-Chlorotoluene ND 0.50 3/30/20 14:47 MFFg/L0.19 3/30/20SM21-22 6200B11,2-Dibromoethane (EDB) ND 0.50 3/30/20 14:47 MFFg/L0.16 3/30/20SM21-22 6200B11,2-Dichlorobenzene ND 0.50 3/30/20 14:47 MFFg/L0.12 3/30/20SM21-22 6200B11,3-Dichlorobenzene ND 0.50 3/30/20 14:47 MFFg/L0.13 3/30/20SM21-22 6200B11,4-Dichlorobenzene ND 0.50 3/30/20 14:47 MFFg/L0.26 3/30/20SM21-22 6200B1Dichlorodifluoromethane (Freon 12) ND 0.50 3/30/20 14:47 MFFg/L0.16 3/30/20SM21-22 6200B11,1-Dichloroethane ND 0.50 3/30/20 14:47 MFFg/L0.41 3/30/20SM21-22 6200B11,2-Dichloroethane ND 0.50 3/30/20 14:47 MFFg/L0.32 3/30/20SM21-22 6200B11,1-Dichloroethylene ND 0.50 3/30/20 14:47 MFFg/L0.13 3/30/20SM21-22 6200B1cis-1,2-Dichloroethylene ND 0.50 3/30/20 14:47 MFFg/L0.31 3/30/20SM21-22 6200B1trans-1,2-Dichloroethylene ND 0.50 3/30/20 14:47 MFFg/L0.20 3/30/20SM21-22 6200B11,2-Dichloropropane ND 0.50 3/30/20 14:47 MFFg/L0.11 3/30/20SM21-22 6200B11,3-Dichloropropane ND 0.50 3/30/20 14:47 MFFg/L0.20 3/30/20SM21-22 6200B12,2-Dichloropropane ND 0.50 3/30/20 14:47 MFFg/L0.16 3/30/20SM21-22 6200B11,1-Dichloropropene ND 0.50 3/30/20 14:47 MFFg/L0.13 3/30/20SM21-22 6200B1cis-1,3-Dichloropropene ND 0.50 3/30/20 14:47 MFFg/L0.23 3/30/20SM21-22 6200B1trans-1,3-Dichloropropene ND 0.50 3/30/20 14:47 MFFg/L0.17 3/30/20SM21-22 6200B1Diisopropyl Ether (DIPE) ND 0.50 3/30/20 14:47 MFFg/L0.13 3/30/20SM21-22 6200B1Ethylbenzene ND 5.0 3/30/20 14:47 MFFg/L1.5 3/30/20SM21-22 6200B12-Hexanone (MBK) ND 2.0 3/30/20 14:47 MFFg/L0.17 3/30/20SM21-22 6200B1Isopropylbenzene (Cumene) ND 0.50 3/30/20 14:47 MFFg/L0.20 3/30/20SM21-22 6200B1p-Isopropyltoluene (p-Cymene) 5.1 0.50 3/30/20 14:47 MFFg/L0.25 3/30/20SM21-22 6200B1Methyl tert-Butyl Ether (MTBE) ND 5.0 3/30/20 14:47 MFFg/L0.34 3/30/20SM21-22 6200B1Methylene Chloride ND 5.0 3/30/20 14:47 MFFg/L1.7 3/30/20SM21-22 6200B14-Methyl-2-pentanone (MIBK) Page 22 of 49 Table of Contents 39 Spruce Street * East Longmeadow, MA 01028 * FAX 413/525-6405 * TEL. 413/525-2332 Date Received: 3/26/2020 Work Order: 20C1270Sample Description:Project Location: Chapel Hill, NC Sample ID: 20C1270-08 Field Sample #: MW-11 Sample Matrix: Ground Water Sampled: 3/26/2020 15:12 AnalystAnalyzedDilutionFlag/QualRLResultsAnalyte Date/Time DL Units Date PreparedMethod Volatile Organic Compounds by GC/MS ND 0.50 3/30/20 14:47 MFFg/L0.31 3/30/20SM21-22 6200B1Naphthalene ND 0.50 3/30/20 14:47 MFFg/L0.13 3/30/20SM21-22 6200B1n-Propylbenzene ND 0.50 3/30/20 14:47 MFFg/L0.11 3/30/20SM21-22 6200B1Styrene ND 0.50 3/30/20 14:47 MFFg/L0.22 3/30/20SM21-22 6200B11,1,2,2-Tetrachloroethane ND 0.50 3/30/20 14:47 MFFg/L0.18 3/30/20SM21-22 6200B1Tetrachloroethylene ND 0.50 3/30/20 14:47 MFFg/L0.14 3/30/20SM21-22 6200B1Toluene ND 1.0 3/30/20 14:47 MFFg/L0.57 3/30/20SM21-22 6200B11,2,3-Trichlorobenzene ND 1.0 3/30/20 14:47 MFFg/L0.40 3/30/20SM21-22 6200B11,2,4-Trichlorobenzene ND 0.50 3/30/20 14:47 MFFg/L0.20 3/30/20SM21-22 6200B11,1,1-Trichloroethane ND 0.50 3/30/20 14:47 MFFg/L0.16 3/30/20SM21-22 6200B11,1,2-Trichloroethane ND 0.50 3/30/20 14:47 MFFg/L0.24 3/30/20SM21-22 6200B1Trichloroethylene ND 0.50 3/30/20 14:47 MFFg/L0.33 3/30/20SM21-22 6200B1Trichlorofluoromethane (Freon 11) ND 0.50 3/30/20 14:47 MFFg/L0.25 3/30/20SM21-22 6200B11,2,3-Trichloropropane ND 1.0 3/30/20 14:47 MFFg/L0.18 3/30/20SM21-22 6200B11,2,4-Trimethylbenzene ND 0.50 3/30/20 14:47 MFFg/L0.14 3/30/20SM21-22 6200B11,3,5-Trimethylbenzene ND 20 3/30/20 14:47 MFFg/L10 3/30/20SM21-22 6200B1Vinyl Acetate ND 0.50 3/30/20 14:47 MFFg/L0.45 3/30/20SM21-22 6200B1Vinyl Chloride ND 1.0 3/30/20 14:47 MFFg/L0.30 3/30/20SM21-22 6200B1m+p Xylene ND 0.50 3/30/20 14:47 MFFg/L0.17 3/30/20SM21-22 6200B1o-Xylene Surrogates % Recovery Recovery Limits Flag/Qual 1,2-Dichloroethane-d4 116 3/30/20 14:4770-130 Toluene-d8 96.0 3/30/20 14:4770-130 4-Bromofluorobenzene 88.4 3/30/20 14:4770-130 Page 23 of 49 Table of Contents 39 Spruce Street * East Longmeadow, MA 01028 * FAX 413/525-6405 * TEL. 413/525-2332 Date Received: 3/26/2020 Work Order: 20C1270Sample Description:Project Location: Chapel Hill, NC Sample ID: 20C1270-09 Field Sample #: MW-7 Sample Matrix: Ground Water Sampled: 3/26/2020 15:35 [TOC_2]20C1270-09[TOC] AnalystAnalyzedDilutionFlag/QualRLResultsAnalyte Date/Time DL Units Date PreparedMethod Volatile Organic Compounds by GC/MS ND 50 3/30/20 15:11 MFFg/L3.8 3/30/20SM21-22 6200B1Acetone 6.8 0.50 3/30/20 15:11 MFFg/L0.18 3/30/20SM21-22 6200B1Benzene ND 0.50 3/30/20 15:11 MFFg/L0.15 3/30/20SM21-22 6200B1Bromobenzene ND 0.50 3/30/20 15:11 MFFg/L0.32 3/30/20SM21-22 6200B1Bromochloromethane ND 0.50 3/30/20 15:11 MFFg/L0.16 3/30/20SM21-22 6200B1Bromodichloromethane ND 0.50 3/30/20 15:11 MFFg/L0.46 3/30/20SM21-22 6200B1Bromoform ND 2.0 3/30/20 15:11 MFFg/L0.78 3/30/20SM21-22 6200B1Bromomethane ND 5.0 3/30/20 15:11 MFFg/L1.9 3/30/20SM21-22 6200B12-Butanone (MEK) ND 0.50 3/30/20 15:11 MFFg/L0.21 3/30/20SM21-22 6200B1n-Butylbenzene ND 0.50 3/30/20 15:11 MFFg/L0.16 3/30/20SM21-22 6200B1sec-Butylbenzene ND 0.50 3/30/20 15:11 MFFg/L0.17 3/30/20SM21-22 6200B1tert-Butylbenzene ND 0.50 3/30/20 15:11 MFFg/L0.11 3/30/20SM21-22 6200B1Carbon Tetrachloride ND 0.50 3/30/20 15:11 MFFg/L0.15 3/30/20SM21-22 6200B1Chlorobenzene ND 50 3/30/20 15:11 MFFg/L11 3/30/20SM21-22 6200B1Ethanol ND 0.50 3/30/20 15:11 MFFg/L0.21 3/30/20SM21-22 6200B1Chlorodibromomethane ND 0.50 3/30/20 15:11 MFFg/L0.35 3/30/20SM21-22 6200B1Chloroethane ND 1.0 3/30/20 15:11 MFFg/L0.17 3/30/20SM21-22 6200B1Chloroform ND 0.60 3/30/20 15:11 MFFg/L0.45 3/30/20SM21-22 6200B1Chloromethane ND 0.50 3/30/20 15:11 MFFg/L0.12 3/30/20SM21-22 6200B12-Chlorotoluene ND 0.50 3/30/20 15:11 MFFg/L0.14 3/30/20SM21-22 6200B14-Chlorotoluene ND 0.50 3/30/20 15:11 MFFg/L0.19 3/30/20SM21-22 6200B11,2-Dibromoethane (EDB) ND 0.50 3/30/20 15:11 MFFg/L0.16 3/30/20SM21-22 6200B11,2-Dichlorobenzene ND 0.50 3/30/20 15:11 MFFg/L0.12 3/30/20SM21-22 6200B11,3-Dichlorobenzene ND 0.50 3/30/20 15:11 MFFg/L0.13 3/30/20SM21-22 6200B11,4-Dichlorobenzene ND 0.50 3/30/20 15:11 MFFg/L0.26 3/30/20SM21-22 6200B1Dichlorodifluoromethane (Freon 12) ND 0.50 3/30/20 15:11 MFFg/L0.16 3/30/20SM21-22 6200B11,1-Dichloroethane ND 0.50 3/30/20 15:11 MFFg/L0.41 3/30/20SM21-22 6200B11,2-Dichloroethane ND 0.50 3/30/20 15:11 MFFg/L0.32 3/30/20SM21-22 6200B11,1-Dichloroethylene ND 0.50 3/30/20 15:11 MFFg/L0.13 3/30/20SM21-22 6200B1cis-1,2-Dichloroethylene ND 0.50 3/30/20 15:11 MFFg/L0.31 3/30/20SM21-22 6200B1trans-1,2-Dichloroethylene ND 0.50 3/30/20 15:11 MFFg/L0.20 3/30/20SM21-22 6200B11,2-Dichloropropane ND 0.50 3/30/20 15:11 MFFg/L0.11 3/30/20SM21-22 6200B11,3-Dichloropropane ND 0.50 3/30/20 15:11 MFFg/L0.20 3/30/20SM21-22 6200B12,2-Dichloropropane ND 0.50 3/30/20 15:11 MFFg/L0.16 3/30/20SM21-22 6200B11,1-Dichloropropene ND 0.50 3/30/20 15:11 MFFg/L0.13 3/30/20SM21-22 6200B1cis-1,3-Dichloropropene ND 0.50 3/30/20 15:11 MFFg/L0.23 3/30/20SM21-22 6200B1trans-1,3-Dichloropropene ND 0.50 3/30/20 15:11 MFFg/L0.17 3/30/20SM21-22 6200B1Diisopropyl Ether (DIPE) 1.2 0.50 3/30/20 15:11 MFFg/L0.13 3/30/20SM21-22 6200B1Ethylbenzene ND 5.0 3/30/20 15:11 MFFg/L1.5 3/30/20SM21-22 6200B12-Hexanone (MBK) ND 2.0 3/30/20 15:11 MFFg/L0.17 3/30/20SM21-22 6200B1Isopropylbenzene (Cumene) ND 0.50 3/30/20 15:11 MFFg/L0.20 3/30/20SM21-22 6200B1p-Isopropyltoluene (p-Cymene) 6.4 0.50 3/30/20 15:11 MFFg/L0.25 3/30/20SM21-22 6200B1Methyl tert-Butyl Ether (MTBE) ND 5.0 3/30/20 15:11 MFFg/L0.34 3/30/20SM21-22 6200B1Methylene Chloride ND 5.0 3/30/20 15:11 MFFg/L1.7 3/30/20SM21-22 6200B14-Methyl-2-pentanone (MIBK) Page 24 of 49 Table of Contents 39 Spruce Street * East Longmeadow, MA 01028 * FAX 413/525-6405 * TEL. 413/525-2332 Date Received: 3/26/2020 Work Order: 20C1270Sample Description:Project Location: Chapel Hill, NC Sample ID: 20C1270-09 Field Sample #: MW-7 Sample Matrix: Ground Water Sampled: 3/26/2020 15:35 AnalystAnalyzedDilutionFlag/QualRLResultsAnalyte Date/Time DL Units Date PreparedMethod Volatile Organic Compounds by GC/MS ND 0.50 3/30/20 15:11 MFFg/L0.31 3/30/20SM21-22 6200B1Naphthalene 0.90 0.50 3/30/20 15:11 MFFg/L0.13 3/30/20SM21-22 6200B1n-Propylbenzene ND 0.50 3/30/20 15:11 MFFg/L0.11 3/30/20SM21-22 6200B1Styrene ND 0.50 3/30/20 15:11 MFFg/L0.22 3/30/20SM21-22 6200B11,1,2,2-Tetrachloroethane ND 0.50 3/30/20 15:11 MFFg/L0.18 3/30/20SM21-22 6200B1Tetrachloroethylene 13 0.50 3/30/20 15:11 MFFg/L0.14 3/30/20SM21-22 6200B1Toluene ND 1.0 3/30/20 15:11 MFFg/L0.57 3/30/20SM21-22 6200B11,2,3-Trichlorobenzene ND 1.0 3/30/20 15:11 MFFg/L0.40 3/30/20SM21-22 6200B11,2,4-Trichlorobenzene ND 0.50 3/30/20 15:11 MFFg/L0.20 3/30/20SM21-22 6200B11,1,1-Trichloroethane ND 0.50 3/30/20 15:11 MFFg/L0.16 3/30/20SM21-22 6200B11,1,2-Trichloroethane ND 0.50 3/30/20 15:11 MFFg/L0.24 3/30/20SM21-22 6200B1Trichloroethylene ND 0.50 3/30/20 15:11 MFFg/L0.33 3/30/20SM21-22 6200B1Trichlorofluoromethane (Freon 11) ND 0.50 3/30/20 15:11 MFFg/L0.25 3/30/20SM21-22 6200B11,2,3-Trichloropropane 0.75 1.0 3/30/20 15:11 MFFg/L0.18 3/30/20SM21-22 6200B1J1,2,4-Trimethylbenzene ND 0.50 3/30/20 15:11 MFFg/L0.14 3/30/20SM21-22 6200B11,3,5-Trimethylbenzene ND 20 3/30/20 15:11 MFFg/L10 3/30/20SM21-22 6200B1Vinyl Acetate ND 0.50 3/30/20 15:11 MFFg/L0.45 3/30/20SM21-22 6200B1Vinyl Chloride 4.0 1.0 3/30/20 15:11 MFFg/L0.30 3/30/20SM21-22 6200B1m+p Xylene 1.8 0.50 3/30/20 15:11 MFFg/L0.17 3/30/20SM21-22 6200B1o-Xylene Surrogates % Recovery Recovery Limits Flag/Qual 1,2-Dichloroethane-d4 119 3/30/20 15:1170-130 Toluene-d8 94.6 3/30/20 15:1170-130 4-Bromofluorobenzene 88.9 3/30/20 15:1170-130 Page 25 of 49 Table of Contents 39 Spruce Street * East Longmeadow, MA 01028 * FAX 413/525-6405 * TEL. 413/525-2332 Date Received: 3/26/2020 Work Order: 20C1270Sample Description:Project Location: Chapel Hill, NC Sample ID: 20C1270-10 Field Sample #: MW-12 Sample Matrix: Ground Water Sampled: 3/26/2020 16:13 [TOC_2]20C1270-10[TOC] AnalystAnalyzedDilutionFlag/QualRLResultsAnalyte Date/Time DL Units Date PreparedMethod Sample Flags: RL-11 Volatile Organic Compounds by GC/MS 960 2500 3/31/20 21:42 MFFg/L190 3/31/20SM21-22 6200B50JAcetone 3700 25 3/31/20 21:42 MFFg/L9.0 3/31/20SM21-22 6200B50Benzene ND 25 3/31/20 21:42 MFFg/L7.5 3/31/20SM21-22 6200B50Bromobenzene ND 25 3/31/20 21:42 MFFg/L16 3/31/20SM21-22 6200B50Bromochloromethane ND 25 3/31/20 21:42 MFFg/L8.0 3/31/20SM21-22 6200B50Bromodichloromethane ND 25 3/31/20 21:42 MFFg/L23 3/31/20SM21-22 6200B50Bromoform ND 100 3/31/20 21:42 MFFg/L39 3/31/20SM21-22 6200B50Bromomethane 940 250 3/31/20 21:42 MFFg/L97 3/31/20SM21-22 6200B502-Butanone (MEK) ND 25 3/31/20 21:42 MFFg/L10 3/31/20SM21-22 6200B50n-Butylbenzene ND 25 3/31/20 21:42 MFFg/L8.0 3/31/20SM21-22 6200B50sec-Butylbenzene ND 25 3/31/20 21:42 MFFg/L8.5 3/31/20SM21-22 6200B50tert-Butylbenzene ND 25 3/31/20 21:42 MFFg/L5.5 3/31/20SM21-22 6200B50Carbon Tetrachloride ND 25 3/31/20 21:42 MFFg/L7.5 3/31/20SM21-22 6200B50Chlorobenzene ND 2500 3/31/20 21:42 MFFg/L530 3/31/20SM21-22 6200B50Ethanol ND 25 3/31/20 21:42 MFFg/L10 3/31/20SM21-22 6200B50Chlorodibromomethane ND 25 3/31/20 21:42 MFFg/L18 3/31/20SM21-22 6200B50Chloroethane ND 50 3/31/20 21:42 MFFg/L8.5 3/31/20SM21-22 6200B50Chloroform ND 30 3/31/20 21:42 MFFg/L22 3/31/20SM21-22 6200B50Chloromethane ND 25 3/31/20 21:42 MFFg/L6.0 3/31/20SM21-22 6200B502-Chlorotoluene ND 25 3/31/20 21:42 MFFg/L7.0 3/31/20SM21-22 6200B504-Chlorotoluene ND 25 3/31/20 21:42 MFFg/L9.5 3/31/20SM21-22 6200B501,2-Dibromoethane (EDB) ND 25 3/31/20 21:42 MFFg/L8.0 3/31/20SM21-22 6200B501,2-Dichlorobenzene ND 25 3/31/20 21:42 MFFg/L6.0 3/31/20SM21-22 6200B501,3-Dichlorobenzene ND 25 3/31/20 21:42 MFFg/L6.5 3/31/20SM21-22 6200B501,4-Dichlorobenzene ND 25 3/31/20 21:42 MFFg/L13 3/31/20SM21-22 6200B50Dichlorodifluoromethane (Freon 12) ND 25 3/31/20 21:42 MFFg/L8.0 3/31/20SM21-22 6200B501,1-Dichloroethane ND 25 3/31/20 21:42 MFFg/L20 3/31/20SM21-22 6200B501,2-Dichloroethane ND 25 3/31/20 21:42 MFFg/L16 3/31/20SM21-22 6200B501,1-Dichloroethylene ND 25 3/31/20 21:42 MFFg/L6.5 3/31/20SM21-22 6200B50cis-1,2-Dichloroethylene ND 25 3/31/20 21:42 MFFg/L16 3/31/20SM21-22 6200B50trans-1,2-Dichloroethylene ND 25 3/31/20 21:42 MFFg/L10 3/31/20SM21-22 6200B501,2-Dichloropropane ND 25 3/31/20 21:42 MFFg/L5.5 3/31/20SM21-22 6200B501,3-Dichloropropane ND 25 3/31/20 21:42 MFFg/L10 3/31/20SM21-22 6200B502,2-Dichloropropane ND 25 3/31/20 21:42 MFFg/L8.0 3/31/20SM21-22 6200B501,1-Dichloropropene ND 25 3/31/20 21:42 MFFg/L6.5 3/31/20SM21-22 6200B50cis-1,3-Dichloropropene ND 25 3/31/20 21:42 MFFg/L12 3/31/20SM21-22 6200B50trans-1,3-Dichloropropene 290 25 3/31/20 21:42 MFFg/L8.5 3/31/20SM21-22 6200B50Diisopropyl Ether (DIPE) 370 25 3/31/20 21:42 MFFg/L6.5 3/31/20SM21-22 6200B50Ethylbenzene 220 250 3/31/20 21:42 MFFg/L76 3/31/20SM21-22 6200B50J2-Hexanone (MBK) ND 100 3/31/20 21:42 MFFg/L8.5 3/31/20SM21-22 6200B50Isopropylbenzene (Cumene) ND 25 3/31/20 21:42 MFFg/L10 3/31/20SM21-22 6200B50p-Isopropyltoluene (p-Cymene) 2900 25 3/31/20 21:42 MFFg/L12 3/31/20SM21-22 6200B50Methyl tert-Butyl Ether (MTBE) ND 250 3/31/20 21:42 MFFg/L17 3/31/20SM21-22 6200B50Methylene Chloride ND 250 3/31/20 21:42 MFFg/L84 3/31/20SM21-22 6200B504-Methyl-2-pentanone (MIBK) Page 26 of 49 Table of Contents 39 Spruce Street * East Longmeadow, MA 01028 * FAX 413/525-6405 * TEL. 413/525-2332 Date Received: 3/26/2020 Work Order: 20C1270Sample Description:Project Location: Chapel Hill, NC Sample ID: 20C1270-10 Field Sample #: MW-12 Sample Matrix: Ground Water Sampled: 3/26/2020 16:13 AnalystAnalyzedDilutionFlag/QualRLResultsAnalyte Date/Time DL Units Date PreparedMethod Sample Flags: RL-11 Volatile Organic Compounds by GC/MS 300 25 3/31/20 21:42 MFFg/L16 3/31/20SM21-22 6200B50Naphthalene 61 25 3/31/20 21:42 MFFg/L6.5 3/31/20SM21-22 6200B50n-Propylbenzene ND 25 3/31/20 21:42 MFFg/L5.5 3/31/20SM21-22 6200B50Styrene ND 25 3/31/20 21:42 MFFg/L11 3/31/20SM21-22 6200B501,1,2,2-Tetrachloroethane ND 25 3/31/20 21:42 MFFg/L9.0 3/31/20SM21-22 6200B50Tetrachloroethylene 1200 25 3/31/20 21:42 MFFg/L7.0 3/31/20SM21-22 6200B50Toluene ND 50 3/31/20 21:42 MFFg/L28 3/31/20SM21-22 6200B501,2,3-Trichlorobenzene ND 50 3/31/20 21:42 MFFg/L20 3/31/20SM21-22 6200B501,2,4-Trichlorobenzene ND 25 3/31/20 21:42 MFFg/L10 3/31/20SM21-22 6200B501,1,1-Trichloroethane ND 25 3/31/20 21:42 MFFg/L8.0 3/31/20SM21-22 6200B501,1,2-Trichloroethane ND 25 3/31/20 21:42 MFFg/L12 3/31/20SM21-22 6200B50Trichloroethylene ND 25 3/31/20 21:42 MFFg/L16 3/31/20SM21-22 6200B50Trichlorofluoromethane (Freon 11) ND 25 3/31/20 21:42 MFFg/L12 3/31/20SM21-22 6200B501,2,3-Trichloropropane 230 50 3/31/20 21:42 MFFg/L9.0 3/31/20SM21-22 6200B501,2,4-Trimethylbenzene 120 25 3/31/20 21:42 MFFg/L7.0 3/31/20SM21-22 6200B501,3,5-Trimethylbenzene ND 1000 3/31/20 21:42 MFFg/L510 3/31/20SM21-22 6200B50Vinyl Acetate ND 25 3/31/20 21:42 MFFg/L22 3/31/20SM21-22 6200B50Vinyl Chloride 1000 50 3/31/20 21:42 MFFg/L15 3/31/20SM21-22 6200B50m+p Xylene 380 25 3/31/20 21:42 MFFg/L8.5 3/31/20SM21-22 6200B50o-Xylene Surrogates % Recovery Recovery Limits Flag/Qual 1,2-Dichloroethane-d4 129 3/31/20 21:4270-130 Toluene-d8 96.0 3/31/20 21:4270-130 4-Bromofluorobenzene 91.6 3/31/20 21:4270-130 Page 27 of 49 Table of Contents 39 Spruce Street * East Longmeadow, MA 01028 * FAX 413/525-6405 * TEL. 413/525-2332 Date Received: 3/26/2020 Work Order: 20C1270Sample Description:Project Location: Chapel Hill, NC Sample ID: 20C1270-11 Field Sample #: MW-4 Sample Matrix: Ground Water Sampled: 3/26/2020 16:38 [TOC_2]20C1270-11[TOC] AnalystAnalyzedDilutionFlag/QualRLResultsAnalyte Date/Time DL Units Date PreparedMethod Sample Flags: RL-11 Volatile Organic Compounds by GC/MS 24 250 3/30/20 18:20 MFFg/L19 3/30/20SM21-22 6200B5JAcetone 1500 50 3/31/20 15:39 MFFg/L18 3/30/20SM21-22 6200B100Benzene ND 2.5 3/30/20 18:20 MFFg/L0.75 3/30/20SM21-22 6200B5Bromobenzene ND 2.5 3/30/20 18:20 MFFg/L1.6 3/30/20SM21-22 6200B5Bromochloromethane ND 2.5 3/30/20 18:20 MFFg/L0.80 3/30/20SM21-22 6200B5Bromodichloromethane ND 2.5 3/30/20 18:20 MFFg/L2.3 3/30/20SM21-22 6200B5Bromoform ND 10 3/30/20 18:20 MFFg/L3.9 3/30/20SM21-22 6200B5Bromomethane ND 25 3/30/20 18:20 MFFg/L9.7 3/30/20SM21-22 6200B52-Butanone (MEK) 3.3 2.5 3/30/20 18:20 MFFg/L1.0 3/30/20SM21-22 6200B5n-Butylbenzene ND 2.5 3/30/20 18:20 MFFg/L0.80 3/30/20SM21-22 6200B5sec-Butylbenzene ND 2.5 3/30/20 18:20 MFFg/L0.85 3/30/20SM21-22 6200B5tert-Butylbenzene ND 2.5 3/30/20 18:20 MFFg/L0.55 3/30/20SM21-22 6200B5Carbon Tetrachloride ND 2.5 3/30/20 18:20 MFFg/L0.75 3/30/20SM21-22 6200B5Chlorobenzene ND 250 3/30/20 18:20 MFFg/L53 3/30/20SM21-22 6200B5Ethanol ND 2.5 3/30/20 18:20 MFFg/L1.0 3/30/20SM21-22 6200B5Chlorodibromomethane ND 2.5 3/30/20 18:20 MFFg/L1.8 3/30/20SM21-22 6200B5Chloroethane ND 5.0 3/30/20 18:20 MFFg/L0.85 3/30/20SM21-22 6200B5Chloroform ND 3.0 3/30/20 18:20 MFFg/L2.2 3/30/20SM21-22 6200B5Chloromethane ND 2.5 3/30/20 18:20 MFFg/L0.60 3/30/20SM21-22 6200B52-Chlorotoluene ND 2.5 3/30/20 18:20 MFFg/L0.70 3/30/20SM21-22 6200B54-Chlorotoluene ND 2.5 3/30/20 18:20 MFFg/L0.95 3/30/20SM21-22 6200B51,2-Dibromoethane (EDB) ND 2.5 3/30/20 18:20 MFFg/L0.80 3/30/20SM21-22 6200B51,2-Dichlorobenzene ND 2.5 3/30/20 18:20 MFFg/L0.60 3/30/20SM21-22 6200B51,3-Dichlorobenzene ND 2.5 3/30/20 18:20 MFFg/L0.65 3/30/20SM21-22 6200B51,4-Dichlorobenzene ND 2.5 3/30/20 18:20 MFFg/L1.3 3/30/20SM21-22 6200B5Dichlorodifluoromethane (Freon 12) ND 2.5 3/30/20 18:20 MFFg/L0.80 3/30/20SM21-22 6200B51,1-Dichloroethane ND 2.5 3/30/20 18:20 MFFg/L2.0 3/30/20SM21-22 6200B51,2-Dichloroethane ND 2.5 3/30/20 18:20 MFFg/L1.6 3/30/20SM21-22 6200B51,1-Dichloroethylene ND 2.5 3/30/20 18:20 MFFg/L0.65 3/30/20SM21-22 6200B5cis-1,2-Dichloroethylene ND 2.5 3/30/20 18:20 MFFg/L1.6 3/30/20SM21-22 6200B5trans-1,2-Dichloroethylene ND 2.5 3/30/20 18:20 MFFg/L1.0 3/30/20SM21-22 6200B51,2-Dichloropropane ND 2.5 3/30/20 18:20 MFFg/L0.55 3/30/20SM21-22 6200B51,3-Dichloropropane ND 2.5 3/30/20 18:20 MFFg/L1.0 3/30/20SM21-22 6200B52,2-Dichloropropane ND 2.5 3/30/20 18:20 MFFg/L0.80 3/30/20SM21-22 6200B51,1-Dichloropropene ND 2.5 3/30/20 18:20 MFFg/L0.65 3/30/20SM21-22 6200B5cis-1,3-Dichloropropene ND 2.5 3/30/20 18:20 MFFg/L1.2 3/30/20SM21-22 6200B5trans-1,3-Dichloropropene 65 2.5 3/30/20 18:20 MFFg/L0.85 3/30/20SM21-22 6200B5Diisopropyl Ether (DIPE) 120 2.5 3/30/20 18:20 MFFg/L0.65 3/30/20SM21-22 6200B5Ethylbenzene ND 25 3/30/20 18:20 MFFg/L7.6 3/30/20SM21-22 6200B52-Hexanone (MBK) 10 10 3/30/20 18:20 MFFg/L0.85 3/30/20SM21-22 6200B5Isopropylbenzene (Cumene) ND 2.5 3/30/20 18:20 MFFg/L1.0 3/30/20SM21-22 6200B5p-Isopropyltoluene (p-Cymene) 590 2.5 3/30/20 18:20 MFFg/L1.2 3/30/20SM21-22 6200B5Methyl tert-Butyl Ether (MTBE) ND 25 3/30/20 18:20 MFFg/L1.7 3/30/20SM21-22 6200B5Methylene Chloride ND 25 3/30/20 18:20 MFFg/L8.4 3/30/20SM21-22 6200B54-Methyl-2-pentanone (MIBK) Page 28 of 49 Table of Contents 39 Spruce Street * East Longmeadow, MA 01028 * FAX 413/525-6405 * TEL. 413/525-2332 Date Received: 3/26/2020 Work Order: 20C1270Sample Description:Project Location: Chapel Hill, NC Sample ID: 20C1270-11 Field Sample #: MW-4 Sample Matrix: Ground Water Sampled: 3/26/2020 16:38 AnalystAnalyzedDilutionFlag/QualRLResultsAnalyte Date/Time DL Units Date PreparedMethod Sample Flags: RL-11 Volatile Organic Compounds by GC/MS 28 2.5 3/30/20 18:20 MFFg/L1.6 3/30/20SM21-22 6200B5Naphthalene 12 2.5 3/30/20 18:20 MFFg/L0.65 3/30/20SM21-22 6200B5n-Propylbenzene ND 2.5 3/30/20 18:20 MFFg/L0.55 3/30/20SM21-22 6200B5Styrene ND 2.5 3/30/20 18:20 MFFg/L1.1 3/30/20SM21-22 6200B51,1,2,2-Tetrachloroethane ND 2.5 3/30/20 18:20 MFFg/L0.90 3/30/20SM21-22 6200B5Tetrachloroethylene 49 2.5 3/30/20 18:20 MFFg/L0.70 3/30/20SM21-22 6200B5Toluene ND 5.0 3/30/20 18:20 MFFg/L2.8 3/30/20SM21-22 6200B51,2,3-Trichlorobenzene ND 5.0 3/30/20 18:20 MFFg/L2.0 3/30/20SM21-22 6200B51,2,4-Trichlorobenzene ND 2.5 3/30/20 18:20 MFFg/L1.0 3/30/20SM21-22 6200B51,1,1-Trichloroethane ND 2.5 3/30/20 18:20 MFFg/L0.80 3/30/20SM21-22 6200B51,1,2-Trichloroethane ND 2.5 3/30/20 18:20 MFFg/L1.2 3/30/20SM21-22 6200B5Trichloroethylene ND 2.5 3/30/20 18:20 MFFg/L1.6 3/30/20SM21-22 6200B5Trichlorofluoromethane (Freon 11) ND 2.5 3/30/20 18:20 MFFg/L1.2 3/30/20SM21-22 6200B51,2,3-Trichloropropane 67 5.0 3/30/20 18:20 MFFg/L0.90 3/30/20SM21-22 6200B51,2,4-Trimethylbenzene 35 2.5 3/30/20 18:20 MFFg/L0.70 3/30/20SM21-22 6200B51,3,5-Trimethylbenzene ND 100 3/30/20 18:20 MFFg/L51 3/30/20SM21-22 6200B5Vinyl Acetate ND 2.5 3/30/20 18:20 MFFg/L2.2 3/30/20SM21-22 6200B5Vinyl Chloride 380 5.0 3/30/20 18:20 MFFg/L1.5 3/30/20SM21-22 6200B5m+p Xylene 70 2.5 3/30/20 18:20 MFFg/L0.85 3/30/20SM21-22 6200B5o-Xylene Surrogates % Recovery Recovery Limits Flag/Qual 1,2-Dichloroethane-d4 104 3/30/20 18:2070-130 1,2-Dichloroethane-d4 130 3/31/20 15:3970-130 Toluene-d8 96.2 3/31/20 15:3970-130 Toluene-d8 94.3 3/30/20 18:2070-130 4-Bromofluorobenzene 88.5 3/31/20 15:3970-130 4-Bromofluorobenzene 99.4 3/30/20 18:2070-130 Page 29 of 49 Table of Contents 39 Spruce Street * East Longmeadow, MA 01028 * FAX 413/525-6405 * TEL. 413/525-2332 Date Received: 3/26/2020 Work Order: 20C1270Sample Description:Project Location: Chapel Hill, NC Sample ID: 20C1270-12 Field Sample #: MW-3 Sample Matrix: Ground Water Sampled: 3/26/2020 17:00 [TOC_2]20C1270-12[TOC] AnalystAnalyzedDilutionFlag/QualRLResultsAnalyte Date/Time DL Units Date PreparedMethod Sample Flags: RL-11 Volatile Organic Compounds by GC/MS 5100 25000 3/30/20 18:44 MFFg/L1900 3/30/20SM21-22 6200B500JAcetone 48000 250 3/30/20 18:44 MFFg/L90 3/30/20SM21-22 6200B500Benzene ND 250 3/30/20 18:44 MFFg/L75 3/30/20SM21-22 6200B500Bromobenzene ND 250 3/30/20 18:44 MFFg/L160 3/30/20SM21-22 6200B500Bromochloromethane ND 250 3/30/20 18:44 MFFg/L80 3/30/20SM21-22 6200B500Bromodichloromethane ND 250 3/30/20 18:44 MFFg/L230 3/30/20SM21-22 6200B500Bromoform ND 1000 3/30/20 18:44 MFFg/L390 3/30/20SM21-22 6200B500Bromomethane 2000 2500 3/30/20 18:44 MFFg/L970 3/30/20SM21-22 6200B500J2-Butanone (MEK) 240 250 3/30/20 18:44 MFFg/L100 3/30/20SM21-22 6200B500Jn-Butylbenzene ND 250 3/30/20 18:44 MFFg/L80 3/30/20SM21-22 6200B500sec-Butylbenzene ND 250 3/30/20 18:44 MFFg/L85 3/30/20SM21-22 6200B500tert-Butylbenzene ND 250 3/30/20 18:44 MFFg/L55 3/30/20SM21-22 6200B500Carbon Tetrachloride ND 250 3/30/20 18:44 MFFg/L75 3/30/20SM21-22 6200B500Chlorobenzene ND 25000 3/30/20 18:44 MFFg/L5300 3/30/20SM21-22 6200B500Ethanol ND 250 3/30/20 18:44 MFFg/L100 3/30/20SM21-22 6200B500Chlorodibromomethane ND 250 3/30/20 18:44 MFFg/L180 3/30/20SM21-22 6200B500Chloroethane ND 500 3/30/20 18:44 MFFg/L85 3/30/20SM21-22 6200B500Chloroform ND 300 3/30/20 18:44 MFFg/L220 3/30/20SM21-22 6200B500Chloromethane ND 250 3/30/20 18:44 MFFg/L60 3/30/20SM21-22 6200B5002-Chlorotoluene ND 250 3/30/20 18:44 MFFg/L70 3/30/20SM21-22 6200B5004-Chlorotoluene ND 250 3/30/20 18:44 MFFg/L95 3/30/20SM21-22 6200B5001,2-Dibromoethane (EDB) ND 250 3/30/20 18:44 MFFg/L80 3/30/20SM21-22 6200B5001,2-Dichlorobenzene ND 250 3/30/20 18:44 MFFg/L60 3/30/20SM21-22 6200B5001,3-Dichlorobenzene ND 250 3/30/20 18:44 MFFg/L65 3/30/20SM21-22 6200B5001,4-Dichlorobenzene ND 250 3/30/20 18:44 MFFg/L130 3/30/20SM21-22 6200B500Dichlorodifluoromethane (Freon 12) ND 250 3/30/20 18:44 MFFg/L80 3/30/20SM21-22 6200B5001,1-Dichloroethane ND 250 3/30/20 18:44 MFFg/L200 3/30/20SM21-22 6200B5001,2-Dichloroethane ND 250 3/30/20 18:44 MFFg/L160 3/30/20SM21-22 6200B5001,1-Dichloroethylene ND 250 3/30/20 18:44 MFFg/L65 3/30/20SM21-22 6200B500cis-1,2-Dichloroethylene ND 250 3/30/20 18:44 MFFg/L160 3/30/20SM21-22 6200B500trans-1,2-Dichloroethylene ND 250 3/30/20 18:44 MFFg/L100 3/30/20SM21-22 6200B5001,2-Dichloropropane ND 250 3/30/20 18:44 MFFg/L55 3/30/20SM21-22 6200B5001,3-Dichloropropane ND 250 3/30/20 18:44 MFFg/L100 3/30/20SM21-22 6200B5002,2-Dichloropropane ND 250 3/30/20 18:44 MFFg/L80 3/30/20SM21-22 6200B5001,1-Dichloropropene ND 250 3/30/20 18:44 MFFg/L65 3/30/20SM21-22 6200B500cis-1,3-Dichloropropene ND 250 3/30/20 18:44 MFFg/L120 3/30/20SM21-22 6200B500trans-1,3-Dichloropropene 200 250 3/30/20 18:44 MFFg/L85 3/30/20SM21-22 6200B500JDiisopropyl Ether (DIPE) 4100 250 3/30/20 18:44 MFFg/L65 3/30/20SM21-22 6200B500Ethylbenzene ND 2500 3/30/20 18:44 MFFg/L760 3/30/20SM21-22 6200B5002-Hexanone (MBK) 700 1000 3/30/20 18:44 MFFg/L85 3/30/20SM21-22 6200B500JIsopropylbenzene (Cumene) ND 250 3/30/20 18:44 MFFg/L100 3/30/20SM21-22 6200B500p-Isopropyltoluene (p-Cymene) 4800 250 3/30/20 18:44 MFFg/L120 3/30/20SM21-22 6200B500Methyl tert-Butyl Ether (MTBE) ND 2500 3/30/20 18:44 MFFg/L170 3/30/20SM21-22 6200B500Methylene Chloride ND 2500 3/30/20 18:44 MFFg/L840 3/30/20SM21-22 6200B5004-Methyl-2-pentanone (MIBK) Page 30 of 49 Table of Contents 39 Spruce Street * East Longmeadow, MA 01028 * FAX 413/525-6405 * TEL. 413/525-2332 Date Received: 3/26/2020 Work Order: 20C1270Sample Description:Project Location: Chapel Hill, NC Sample ID: 20C1270-12 Field Sample #: MW-3 Sample Matrix: Ground Water Sampled: 3/26/2020 17:00 AnalystAnalyzedDilutionFlag/QualRLResultsAnalyte Date/Time DL Units Date PreparedMethod Sample Flags: RL-11 Volatile Organic Compounds by GC/MS 2800 250 3/30/20 18:44 MFFg/L160 3/30/20SM21-22 6200B500Naphthalene 820 250 3/30/20 18:44 MFFg/L65 3/30/20SM21-22 6200B500n-Propylbenzene ND 250 3/30/20 18:44 MFFg/L55 3/30/20SM21-22 6200B500Styrene ND 250 3/30/20 18:44 MFFg/L110 3/30/20SM21-22 6200B5001,1,2,2-Tetrachloroethane ND 250 3/30/20 18:44 MFFg/L90 3/30/20SM21-22 6200B500Tetrachloroethylene 55000 250 3/30/20 18:44 MFFg/L70 3/30/20SM21-22 6200B500Toluene ND 500 3/30/20 18:44 MFFg/L280 3/30/20SM21-22 6200B5001,2,3-Trichlorobenzene ND 500 3/30/20 18:44 MFFg/L200 3/30/20SM21-22 6200B5001,2,4-Trichlorobenzene ND 250 3/30/20 18:44 MFFg/L100 3/30/20SM21-22 6200B5001,1,1-Trichloroethane ND 250 3/30/20 18:44 MFFg/L80 3/30/20SM21-22 6200B5001,1,2-Trichloroethane ND 250 3/30/20 18:44 MFFg/L120 3/30/20SM21-22 6200B500Trichloroethylene ND 250 3/30/20 18:44 MFFg/L160 3/30/20SM21-22 6200B500Trichlorofluoromethane (Freon 11) ND 250 3/30/20 18:44 MFFg/L120 3/30/20SM21-22 6200B5001,2,3-Trichloropropane 3700 500 3/30/20 18:44 MFFg/L90 3/30/20SM21-22 6200B5001,2,4-Trimethylbenzene 1300 250 3/30/20 18:44 MFFg/L70 3/30/20SM21-22 6200B5001,3,5-Trimethylbenzene ND 10000 3/30/20 18:44 MFFg/L5100 3/30/20SM21-22 6200B500Vinyl Acetate ND 250 3/30/20 18:44 MFFg/L220 3/30/20SM21-22 6200B500Vinyl Chloride 15000 500 3/30/20 18:44 MFFg/L150 3/30/20SM21-22 6200B500m+p Xylene 6500 250 3/30/20 18:44 MFFg/L85 3/30/20SM21-22 6200B500o-Xylene Surrogates % Recovery Recovery Limits Flag/Qual 1,2-Dichloroethane-d4 106 3/30/20 18:4470-130 Toluene-d8 93.2 3/30/20 18:4470-130 4-Bromofluorobenzene 93.8 3/30/20 18:4470-130 Page 31 of 49 Table of Contents 39 Spruce Street * East Longmeadow, MA 01028 * FAX 413/525-6405 * TEL. 413/525-2332 Date Received: 3/26/2020 Work Order: 20C1270Sample Description:Project Location: Chapel Hill, NC Sample ID: 20C1270-13 Field Sample #: field blank Sample Matrix: Field Blank Sampled: 3/26/2020 17:20 [TOC_2]20C1270-13[TOC] AnalystAnalyzedDilutionFlag/QualRLResultsAnalyte Date/Time DL Units Date PreparedMethod Volatile Organic Compounds by GC/MS ND 50 3/30/20 11:39 MFFg/L3.8 3/30/20SM21-22 6200B1Acetone ND 0.50 3/30/20 11:39 MFFg/L0.18 3/30/20SM21-22 6200B1Benzene ND 0.50 3/30/20 11:39 MFFg/L0.15 3/30/20SM21-22 6200B1Bromobenzene ND 0.50 3/30/20 11:39 MFFg/L0.32 3/30/20SM21-22 6200B1Bromochloromethane ND 0.50 3/30/20 11:39 MFFg/L0.16 3/30/20SM21-22 6200B1Bromodichloromethane ND 0.50 3/30/20 11:39 MFFg/L0.46 3/30/20SM21-22 6200B1Bromoform ND 2.0 3/30/20 11:39 MFFg/L0.78 3/30/20SM21-22 6200B1Bromomethane ND 5.0 3/30/20 11:39 MFFg/L1.9 3/30/20SM21-22 6200B12-Butanone (MEK) ND 0.50 3/30/20 11:39 MFFg/L0.21 3/30/20SM21-22 6200B1n-Butylbenzene ND 0.50 3/30/20 11:39 MFFg/L0.16 3/30/20SM21-22 6200B1sec-Butylbenzene ND 0.50 3/30/20 11:39 MFFg/L0.17 3/30/20SM21-22 6200B1tert-Butylbenzene ND 0.50 3/30/20 11:39 MFFg/L0.11 3/30/20SM21-22 6200B1Carbon Tetrachloride ND 0.50 3/30/20 11:39 MFFg/L0.15 3/30/20SM21-22 6200B1Chlorobenzene ND 50 3/30/20 11:39 MFFg/L11 3/30/20SM21-22 6200B1Ethanol ND 0.50 3/30/20 11:39 MFFg/L0.21 3/30/20SM21-22 6200B1Chlorodibromomethane ND 0.50 3/30/20 11:39 MFFg/L0.35 3/30/20SM21-22 6200B1Chloroethane ND 1.0 3/30/20 11:39 MFFg/L0.17 3/30/20SM21-22 6200B1Chloroform ND 0.60 3/30/20 11:39 MFFg/L0.45 3/30/20SM21-22 6200B1Chloromethane ND 0.50 3/30/20 11:39 MFFg/L0.12 3/30/20SM21-22 6200B12-Chlorotoluene ND 0.50 3/30/20 11:39 MFFg/L0.14 3/30/20SM21-22 6200B14-Chlorotoluene ND 0.50 3/30/20 11:39 MFFg/L0.19 3/30/20SM21-22 6200B11,2-Dibromoethane (EDB) ND 0.50 3/30/20 11:39 MFFg/L0.16 3/30/20SM21-22 6200B11,2-Dichlorobenzene ND 0.50 3/30/20 11:39 MFFg/L0.12 3/30/20SM21-22 6200B11,3-Dichlorobenzene ND 0.50 3/30/20 11:39 MFFg/L0.13 3/30/20SM21-22 6200B11,4-Dichlorobenzene ND 0.50 3/30/20 11:39 MFFg/L0.26 3/30/20SM21-22 6200B1Dichlorodifluoromethane (Freon 12) ND 0.50 3/30/20 11:39 MFFg/L0.16 3/30/20SM21-22 6200B11,1-Dichloroethane ND 0.50 3/30/20 11:39 MFFg/L0.41 3/30/20SM21-22 6200B11,2-Dichloroethane ND 0.50 3/30/20 11:39 MFFg/L0.32 3/30/20SM21-22 6200B11,1-Dichloroethylene ND 0.50 3/30/20 11:39 MFFg/L0.13 3/30/20SM21-22 6200B1cis-1,2-Dichloroethylene ND 0.50 3/30/20 11:39 MFFg/L0.31 3/30/20SM21-22 6200B1trans-1,2-Dichloroethylene ND 0.50 3/30/20 11:39 MFFg/L0.20 3/30/20SM21-22 6200B11,2-Dichloropropane ND 0.50 3/30/20 11:39 MFFg/L0.11 3/30/20SM21-22 6200B11,3-Dichloropropane ND 0.50 3/30/20 11:39 MFFg/L0.20 3/30/20SM21-22 6200B12,2-Dichloropropane ND 0.50 3/30/20 11:39 MFFg/L0.16 3/30/20SM21-22 6200B11,1-Dichloropropene ND 0.50 3/30/20 11:39 MFFg/L0.13 3/30/20SM21-22 6200B1cis-1,3-Dichloropropene ND 0.50 3/30/20 11:39 MFFg/L0.23 3/30/20SM21-22 6200B1trans-1,3-Dichloropropene ND 0.50 3/30/20 11:39 MFFg/L0.17 3/30/20SM21-22 6200B1Diisopropyl Ether (DIPE) ND 0.50 3/30/20 11:39 MFFg/L0.13 3/30/20SM21-22 6200B1Ethylbenzene ND 5.0 3/30/20 11:39 MFFg/L1.5 3/30/20SM21-22 6200B12-Hexanone (MBK) ND 2.0 3/30/20 11:39 MFFg/L0.17 3/30/20SM21-22 6200B1Isopropylbenzene (Cumene) ND 0.50 3/30/20 11:39 MFFg/L0.20 3/30/20SM21-22 6200B1p-Isopropyltoluene (p-Cymene) ND 0.50 3/30/20 11:39 MFFg/L0.25 3/30/20SM21-22 6200B1Methyl tert-Butyl Ether (MTBE) ND 5.0 3/30/20 11:39 MFFg/L0.34 3/30/20SM21-22 6200B1Methylene Chloride ND 5.0 3/30/20 11:39 MFFg/L1.7 3/30/20SM21-22 6200B14-Methyl-2-pentanone (MIBK) Page 32 of 49 Table of Contents 39 Spruce Street * East Longmeadow, MA 01028 * FAX 413/525-6405 * TEL. 413/525-2332 Date Received: 3/26/2020 Work Order: 20C1270Sample Description:Project Location: Chapel Hill, NC Sample ID: 20C1270-13 Field Sample #: field blank Sample Matrix: Field Blank Sampled: 3/26/2020 17:20 AnalystAnalyzedDilutionFlag/QualRLResultsAnalyte Date/Time DL Units Date PreparedMethod Volatile Organic Compounds by GC/MS ND 0.50 3/30/20 11:39 MFFg/L0.31 3/30/20SM21-22 6200B1Naphthalene ND 0.50 3/30/20 11:39 MFFg/L0.13 3/30/20SM21-22 6200B1n-Propylbenzene ND 0.50 3/30/20 11:39 MFFg/L0.11 3/30/20SM21-22 6200B1Styrene ND 0.50 3/30/20 11:39 MFFg/L0.22 3/30/20SM21-22 6200B11,1,2,2-Tetrachloroethane ND 0.50 3/30/20 11:39 MFFg/L0.18 3/30/20SM21-22 6200B1Tetrachloroethylene ND 0.50 3/30/20 11:39 MFFg/L0.14 3/30/20SM21-22 6200B1Toluene ND 1.0 3/30/20 11:39 MFFg/L0.57 3/30/20SM21-22 6200B11,2,3-Trichlorobenzene ND 1.0 3/30/20 11:39 MFFg/L0.40 3/30/20SM21-22 6200B11,2,4-Trichlorobenzene ND 0.50 3/30/20 11:39 MFFg/L0.20 3/30/20SM21-22 6200B11,1,1-Trichloroethane ND 0.50 3/30/20 11:39 MFFg/L0.16 3/30/20SM21-22 6200B11,1,2-Trichloroethane ND 0.50 3/30/20 11:39 MFFg/L0.24 3/30/20SM21-22 6200B1Trichloroethylene ND 0.50 3/30/20 11:39 MFFg/L0.33 3/30/20SM21-22 6200B1Trichlorofluoromethane (Freon 11) ND 0.50 3/30/20 11:39 MFFg/L0.25 3/30/20SM21-22 6200B11,2,3-Trichloropropane ND 1.0 3/30/20 11:39 MFFg/L0.18 3/30/20SM21-22 6200B11,2,4-Trimethylbenzene ND 0.50 3/30/20 11:39 MFFg/L0.14 3/30/20SM21-22 6200B11,3,5-Trimethylbenzene ND 20 3/30/20 11:39 MFFg/L10 3/30/20SM21-22 6200B1Vinyl Acetate ND 0.50 3/30/20 11:39 MFFg/L0.45 3/30/20SM21-22 6200B1Vinyl Chloride ND 1.0 3/30/20 11:39 MFFg/L0.30 3/30/20SM21-22 6200B1m+p Xylene ND 0.50 3/30/20 11:39 MFFg/L0.17 3/30/20SM21-22 6200B1o-Xylene Surrogates % Recovery Recovery Limits Flag/Qual 1,2-Dichloroethane-d4 113 3/30/20 11:3970-130 Toluene-d8 95.3 3/30/20 11:3970-130 4-Bromofluorobenzene 86.4 3/30/20 11:3970-130 Page 33 of 49 Table of Contents 39 Spruce Street * East Longmeadow, MA 01028 * FAX 413/525-6405 * TEL. 413/525-2332 Sample Extraction Data Prep Method: SW-846 5030B-SM21-22 6200B Lab Number [Field ID]Batch DateInitial [mL]Final [mL] B255276 03/30/2055.0020C1270-01 [MW-10] B255276 03/30/2055.0020C1270-02 [MW-9] B255276 03/30/2055.0020C1270-03 [MW-6] B255276 03/30/2055.0020C1270-04 [MW-5] B255276 03/30/2055.0020C1270-05 [MW-1] B255276 03/30/2055.0020C1270-06 [MW-2] B255276 03/30/2055.0020C1270-07 [MW-8] B255276 03/30/2055.0020C1270-08 [MW-11] B255276 03/30/2055.0020C1270-09 [MW-7] B255276 03/30/2015.0020C1270-11 [MW-4] B255276 03/30/200.01 5.0020C1270-12 [MW-3] B255276 03/30/2055.0020C1270-13 [field blank] Prep Method: SW-846 5030B-SM21-22 6200B Lab Number [Field ID]Batch DateInitial [mL]Final [mL] B255359 03/31/200.1 5.0020C1270-10 [MW-12] B255359 03/30/200.05 5.0020C1270-11RE1 [MW-4] [TOC_1]Sample Preparation Information[TOC] Page 34 of 49 Table of Contents 39 Spruce Street * East Longmeadow, MA 01028 * FAX 413/525-6405 * TEL. 413/525-2332 Result Limit Reporting Units Level Spike Result Source %REC %REC Limits RPD RPD Limit Notes Analyte Volatile Organic Compounds by GC/MS - Quality Control QUALITY CONTROL [TOC_2]Volatile Organic Compounds by GC/MS[TOC] Batch B255276 - SW-846 5030B [TOC_3]B255276[TOC] Blank (B255276-BLK1) Prepared & Analyzed: 03/30/20 Acetone g/L50ND Benzene g/L0.50ND Bromobenzene g/L0.50ND Bromochloromethane g/L0.50ND Bromodichloromethane g/L0.50ND Bromoform g/L0.50ND Bromomethane g/L1.0ND 2-Butanone (MEK)g/L5.0ND n-Butylbenzene g/L0.50ND sec-Butylbenzene g/L0.50ND tert-Butylbenzene g/L0.50ND Carbon Tetrachloride g/L0.50ND Chlorobenzene g/L0.50ND Ethanol g/L50ND Chlorodibromomethane g/L0.50ND Chloroethane g/L0.50ND Chloroform g/L0.50ND Chloromethane g/L0.60ND 2-Chlorotoluene g/L0.50ND 4-Chlorotoluene g/L0.50ND 1,2-Dibromoethane (EDB)g/L0.50ND 1,2-Dichlorobenzene g/L0.50ND 1,3-Dichlorobenzene g/L0.50ND 1,4-Dichlorobenzene g/L0.50ND Dichlorodifluoromethane (Freon 12)g/L0.50ND 1,1-Dichloroethane g/L0.50ND 1,2-Dichloroethane g/L0.50ND 1,1-Dichloroethylene g/L0.50ND cis-1,2-Dichloroethylene g/L0.50ND trans-1,2-Dichloroethylene g/L0.50ND 1,2-Dichloropropane g/L0.50ND 1,3-Dichloropropane g/L0.50ND 2,2-Dichloropropane g/L0.50ND 1,1-Dichloropropene g/L0.50ND cis-1,3-Dichloropropene g/L0.50ND trans-1,3-Dichloropropene g/L0.50ND Diisopropyl Ether (DIPE)g/L0.50ND Ethylbenzene g/L0.50ND 2-Hexanone (MBK)g/L5.0ND Isopropylbenzene (Cumene)g/L0.50ND p-Isopropyltoluene (p-Cymene)g/L0.50ND Methyl tert-Butyl Ether (MTBE)g/L0.50ND Methylene Chloride g/L5.0ND 4-Methyl-2-pentanone (MIBK)g/L5.0ND Naphthalene g/L0.50ND n-Propylbenzene g/L0.50ND Styrene g/L0.50ND 1,1,2,2-Tetrachloroethane g/L0.50ND Tetrachloroethylene g/L0.50ND Toluene g/L0.50ND 1,2,3-Trichlorobenzene g/L1.0ND 1,2,4-Trichlorobenzene g/L0.50ND [TOC_1]QC Data[TOC] Page 35 of 49 Table of Contents 39 Spruce Street * East Longmeadow, MA 01028 * FAX 413/525-6405 * TEL. 413/525-2332 Result Limit Reporting Units Level Spike Result Source %REC %REC Limits RPD RPD Limit Notes Analyte Volatile Organic Compounds by GC/MS - Quality Control QUALITY CONTROL Batch B255276 - SW-846 5030B Blank (B255276-BLK1) Prepared & Analyzed: 03/30/20 1,1,1-Trichloroethane g/L0.50ND 1,1,2-Trichloroethane g/L0.50ND Trichloroethylene g/L0.50ND Trichlorofluoromethane (Freon 11)g/L0.50ND 1,2,3-Trichloropropane g/L0.50ND 1,2,4-Trimethylbenzene g/L0.50ND 1,3,5-Trimethylbenzene g/L0.50ND Vinyl Acetate g/L20ND Vinyl Chloride g/L0.50ND m+p Xylene g/L1.0ND o-Xylene g/L0.50ND g/L 25.0 70-130Surrogate: 1,2-Dichloroethane-d4 11528.8 g/L 25.0 70-130Surrogate: Toluene-d8 94.823.7 g/L 25.0 70-130Surrogate: 4-Bromofluorobenzene 88.422.1 LCS (B255276-BS1) Prepared & Analyzed: 03/30/20 Acetone g/L50 100 70-130101101 Benzene g/L0.50 10.0 70-13012212.2 Bromobenzene g/L0.50 10.0 70-13099.19.91 Bromochloromethane g/L0.50 10.0 70-13012512.5 Bromodichloromethane g/L0.50 10.0 70-13095.59.55 Bromoform g/L0.50 10.0 70-13092.89.28 Bromomethane g/L1.0 10.0 60-14012212.2 2-Butanone (MEK)g/L5.0 100 70-130120120 n-Butylbenzene g/L0.50 10.0 70-13010910.9 sec-Butylbenzene g/L0.50 10.0 70-13010610.6 tert-Butylbenzene g/L0.50 10.0 70-13010010.0 Carbon Tetrachloride g/L0.50 10.0 70-13094.99.49 Chlorobenzene g/L0.50 10.0 70-13010110.1 Ethanol g/L50 100 70-13097.797.7 Chlorodibromomethane g/L0.50 10.0 70-13092.99.29 Chloroethane g/L0.50 10.0 60-14094.29.42 Chloroform g/L0.50 10.0 70-13011011.0 Chloromethane g/L0.60 10.0 60-14011311.3 2-Chlorotoluene g/L0.50 10.0 70-13010310.3 4-Chlorotoluene g/L0.50 10.0 70-13010810.8 1,2-Dibromoethane (EDB)g/L0.50 10.0 70-13010110.1 1,2-Dichlorobenzene g/L0.50 10.0 70-13010110.1 1,3-Dichlorobenzene g/L0.50 10.0 70-13010610.6 1,4-Dichlorobenzene g/L0.50 10.0 70-13099.59.95 Dichlorodifluoromethane (Freon 12)g/L0.50 10.0 60-14074.47.44 1,1-Dichloroethane g/L0.50 10.0 70-13011611.6 1,2-Dichloroethane g/L0.50 10.0 70-13088.48.84 1,1-Dichloroethylene g/L0.50 10.0 70-13010410.4 cis-1,2-Dichloroethylene g/L0.50 10.0 70-13010910.9 trans-1,2-Dichloroethylene g/L0.50 10.0 70-13010310.3 1,2-Dichloropropane g/L0.50 10.0 70-13011011.0 1,3-Dichloropropane g/L0.50 10.0 70-13098.59.85 2,2-Dichloropropane g/L0.50 10.0 70-13011011.0 1,1-Dichloropropene g/L0.50 10.0 70-13010810.8 cis-1,3-Dichloropropene g/L0.50 10.0 70-13010210.2 trans-1,3-Dichloropropene g/L0.50 10.0 70-13095.49.54 Page 36 of 49 Table of Contents 39 Spruce Street * East Longmeadow, MA 01028 * FAX 413/525-6405 * TEL. 413/525-2332 Result Limit Reporting Units Level Spike Result Source %REC %REC Limits RPD RPD Limit Notes Analyte Volatile Organic Compounds by GC/MS - Quality Control QUALITY CONTROL Batch B255276 - SW-846 5030B LCS (B255276-BS1) Prepared & Analyzed: 03/30/20 Diisopropyl Ether (DIPE)g/L0.50 10.0 70-13011911.9 Ethylbenzene g/L0.50 10.0 70-13098.69.86 2-Hexanone (MBK)g/L5.0 100 70-130102102 Isopropylbenzene (Cumene)g/L0.50 10.0 70-13091.69.16 p-Isopropyltoluene (p-Cymene)g/L0.50 10.0 70-13094.49.44 Methyl tert-Butyl Ether (MTBE)g/L0.50 10.0 70-13010210.2 Methylene Chloride g/L5.0 10.0 70-13011311.3 4-Methyl-2-pentanone (MIBK)g/L5.0 100 70-130107107 Naphthalene g/L0.50 10.0 70-13011211.2 n-Propylbenzene g/L0.50 10.0 70-13098.29.82 Styrene g/L0.50 10.0 70-13095.59.55 1,1,2,2-Tetrachloroethane g/L0.50 10.0 70-13011011.0 Tetrachloroethylene g/L0.50 10.0 70-13098.79.87 Toluene g/L0.50 10.0 70-13010310.3 1,2,3-Trichlorobenzene g/L1.0 10.0 70-13010610.6 1,2,4-Trichlorobenzene g/L0.50 10.0 70-13010210.2 1,1,1-Trichloroethane g/L0.50 10.0 70-13010310.3 1,1,2-Trichloroethane g/L0.50 10.0 70-13010210.2 Trichloroethylene g/L0.50 10.0 70-13094.99.49 Trichlorofluoromethane (Freon 11)g/L0.50 10.0 70-13086.58.65 1,2,3-Trichloropropane g/L0.50 10.0 70-13010310.3 1,2,4-Trimethylbenzene g/L0.50 10.0 70-13098.79.87 1,3,5-Trimethylbenzene g/L0.50 10.0 70-13093.59.35 Vinyl Acetate g/L20 100 70-130117117 Vinyl Chloride g/L0.50 10.0 60-14096.79.67 m+p Xylene g/L1.0 20.0 70-13010120.2 o-Xylene g/L0.50 10.0 70-13097.39.73 g/L 25.0 70-130Surrogate: 1,2-Dichloroethane-d4 98.324.6 g/L 25.0 70-130Surrogate: Toluene-d8 10325.8 g/L 25.0 70-130Surrogate: 4-Bromofluorobenzene 99.824.9 LCS Dup (B255276-BSD1) Prepared & Analyzed: 03/30/20 Acetone g/L50 100 2570-13091.2 9.9491.2 Benzene g/L0.50 10.0 2570-130118 2.9211.8 Bromobenzene g/L0.50 10.0 2570-130101 2.0010.1 Bromochloromethane g/L0.50 10.0 2570-130122 2.8312.2 Bromodichloromethane g/L0.50 10.0 2570-13094.6 0.9479.46 Bromoform g/L0.50 10.0 2570-13092.8 0.009.28 Bromomethane g/L1.0 10.0 2560-140110 10.911.0 2-Butanone (MEK)g/L5.0 100 2570-130116 3.79116 n-Butylbenzene g/L0.50 10.0 2570-130105 4.1110.5 sec-Butylbenzene g/L0.50 10.0 2570-130104 1.7210.4 tert-Butylbenzene g/L0.50 10.0 2570-13097.2 3.149.72 Carbon Tetrachloride g/L0.50 10.0 2570-13097.1 2.299.71 Chlorobenzene g/L0.50 10.0 2570-130100 0.69410.0 Ethanol g/L50 100 2570-13096.2 1.6096.2 Chlorodibromomethane g/L0.50 10.0 2570-13089.9 3.288.99 Chloroethane g/L0.50 10.0 2560-14096.9 2.839.69 Chloroform g/L0.50 10.0 2570-130109 0.73010.9 Chloromethane g/L0.60 10.0 2560-140113 0.088711.3 2-Chlorotoluene g/L0.50 10.0 2570-130103 0.48510.3 4-Chlorotoluene g/L0.50 10.0 2570-130107 1.3010.7 Page 37 of 49 Table of Contents 39 Spruce Street * East Longmeadow, MA 01028 * FAX 413/525-6405 * TEL. 413/525-2332 Result Limit Reporting Units Level Spike Result Source %REC %REC Limits RPD RPD Limit Notes Analyte Volatile Organic Compounds by GC/MS - Quality Control QUALITY CONTROL Batch B255276 - SW-846 5030B LCS Dup (B255276-BSD1) Prepared & Analyzed: 03/30/20 1,2-Dibromoethane (EDB)g/L0.50 10.0 2570-13097.5 3.639.75 1,2-Dichlorobenzene g/L0.50 10.0 2570-13098.5 2.219.85 1,3-Dichlorobenzene g/L0.50 10.0 2570-130102 3.9510.2 1,4-Dichlorobenzene g/L0.50 10.0 2570-130101 1.3010.1 Dichlorodifluoromethane (Freon 12)g/L0.50 10.0 2560-14074.1 0.4047.41 1,1-Dichloroethane g/L0.50 10.0 2570-130120 3.4712.0 1,2-Dichloroethane g/L0.50 10.0 2570-13084.6 4.398.46 1,1-Dichloroethylene g/L0.50 10.0 2570-130102 2.3210.2 cis-1,2-Dichloroethylene g/L0.50 10.0 2570-130113 3.7811.3 trans-1,2-Dichloroethylene g/L0.50 10.0 2570-130107 3.7310.7 1,2-Dichloropropane g/L0.50 10.0 2570-130104 6.1610.4 1,3-Dichloropropane g/L0.50 10.0 2570-13099.0 0.5069.90 2,2-Dichloropropane g/L0.50 10.0 2570-130112 1.4411.2 1,1-Dichloropropene g/L0.50 10.0 2570-130110 2.0211.0 cis-1,3-Dichloropropene g/L0.50 10.0 2570-130102 0.49010.2 trans-1,3-Dichloropropene g/L0.50 10.0 2570-13094.9 0.5259.49 Diisopropyl Ether (DIPE)g/L0.50 10.0 2570-130118 1.5211.8 Ethylbenzene g/L0.50 10.0 2570-13099.6 1.019.96 2-Hexanone (MBK)g/L5.0 100 2570-13092.2 10.692.2 Isopropylbenzene (Cumene)g/L0.50 10.0 2570-13092.2 0.6539.22 p-Isopropyltoluene (p-Cymene)g/L0.50 10.0 2570-13091.9 2.689.19 Methyl tert-Butyl Ether (MTBE)g/L0.50 10.0 2570-130105 2.8910.5 Methylene Chloride g/L5.0 10.0 2570-130110 2.6911.0 4-Methyl-2-pentanone (MIBK)g/L5.0 100 2570-13098.7 8.3298.7 Naphthalene g/L0.50 10.0 2570-130105 6.0710.5 n-Propylbenzene g/L0.50 10.0 2570-13098.0 0.2049.80 Styrene g/L0.50 10.0 2570-13094.3 1.269.43 1,1,2,2-Tetrachloroethane g/L0.50 10.0 2570-130103 6.7710.3 Tetrachloroethylene g/L0.50 10.0 2570-13098.2 0.5089.82 Toluene g/L0.50 10.0 2570-130105 1.8310.5 1,2,3-Trichlorobenzene g/L1.0 10.0 2570-130102 3.6510.2 1,2,4-Trichlorobenzene g/L0.50 10.0 2570-13092.9 8.959.29 1,1,1-Trichloroethane g/L0.50 10.0 2570-130100 2.6510.0 1,1,2-Trichloroethane g/L0.50 10.0 2570-13096.8 5.239.68 Trichloroethylene g/L0.50 10.0 2570-13092.0 3.109.20 Trichlorofluoromethane (Freon 11)g/L0.50 10.0 2570-13087.9 1.618.79 1,2,3-Trichloropropane g/L0.50 10.0 2570-130104 0.38610.4 1,2,4-Trimethylbenzene g/L0.50 10.0 2570-13096.8 1.949.68 1,3,5-Trimethylbenzene g/L0.50 10.0 2570-13092.4 1.189.24 Vinyl Acetate g/L20 100 2570-130116 0.592116 Vinyl Chloride g/L0.50 10.0 2560-14099.4 2.759.94 m+p Xylene g/L1.0 20.0 2570-130103 1.9120.6 o-Xylene g/L0.50 10.0 2570-13095.2 2.189.52 g/L 25.0 70-130Surrogate: 1,2-Dichloroethane-d4 99.524.9 g/L 25.0 70-130Surrogate: Toluene-d8 10325.7 g/L 25.0 70-130Surrogate: 4-Bromofluorobenzene 10025.1 Page 38 of 49 Table of Contents 39 Spruce Street * East Longmeadow, MA 01028 * FAX 413/525-6405 * TEL. 413/525-2332 Result Limit Reporting Units Level Spike Result Source %REC %REC Limits RPD RPD Limit Notes Analyte Volatile Organic Compounds by GC/MS - Quality Control QUALITY CONTROL Batch B255359 - SW-846 5030B [TOC_3]B255359[TOC] Blank (B255359-BLK1) Prepared & Analyzed: 03/31/20 Acetone g/L50ND Benzene g/L0.50ND Bromobenzene g/L0.50ND Bromochloromethane g/L0.50ND Bromodichloromethane g/L0.50ND Bromoform g/L0.50ND Bromomethane g/L1.0ND 2-Butanone (MEK)g/L5.0ND n-Butylbenzene g/L0.50ND sec-Butylbenzene g/L0.50ND tert-Butylbenzene g/L0.50ND Carbon Tetrachloride g/L0.50ND Chlorobenzene g/L0.50ND Ethanol g/L50ND Chlorodibromomethane g/L0.50ND Chloroethane g/L0.50ND Chloroform g/L0.50ND Chloromethane g/L0.60ND 2-Chlorotoluene g/L0.50ND 4-Chlorotoluene g/L0.50ND 1,2-Dibromoethane (EDB)g/L0.50ND 1,2-Dichlorobenzene g/L0.50ND 1,3-Dichlorobenzene g/L0.50ND 1,4-Dichlorobenzene g/L0.50ND Dichlorodifluoromethane (Freon 12)g/L0.50ND 1,1-Dichloroethane g/L0.50ND 1,2-Dichloroethane g/L0.50ND 1,1-Dichloroethylene g/L0.50ND cis-1,2-Dichloroethylene g/L0.50ND trans-1,2-Dichloroethylene g/L0.50ND 1,2-Dichloropropane g/L0.50ND 1,3-Dichloropropane g/L0.50ND 2,2-Dichloropropane g/L0.50ND 1,1-Dichloropropene g/L0.50ND cis-1,3-Dichloropropene g/L0.50ND trans-1,3-Dichloropropene g/L0.50ND Diisopropyl Ether (DIPE)g/L0.50ND Ethylbenzene g/L0.50ND 2-Hexanone (MBK)g/L5.0ND Isopropylbenzene (Cumene)g/L0.50ND p-Isopropyltoluene (p-Cymene)g/L0.50ND Methyl tert-Butyl Ether (MTBE)g/L0.50ND Methylene Chloride g/L5.0ND 4-Methyl-2-pentanone (MIBK)g/L5.0ND Naphthalene g/L0.50ND n-Propylbenzene g/L0.50ND Styrene g/L0.50ND 1,1,2,2-Tetrachloroethane g/L0.50ND Tetrachloroethylene g/L0.50ND Toluene g/L0.50ND 1,2,3-Trichlorobenzene g/L1.0ND 1,2,4-Trichlorobenzene g/L0.50ND Page 39 of 49 Table of Contents 39 Spruce Street * East Longmeadow, MA 01028 * FAX 413/525-6405 * TEL. 413/525-2332 Result Limit Reporting Units Level Spike Result Source %REC %REC Limits RPD RPD Limit Notes Analyte Volatile Organic Compounds by GC/MS - Quality Control QUALITY CONTROL Batch B255359 - SW-846 5030B Blank (B255359-BLK1) Prepared & Analyzed: 03/31/20 1,1,1-Trichloroethane g/L0.50ND 1,1,2-Trichloroethane g/L0.50ND Trichloroethylene g/L0.50ND Trichlorofluoromethane (Freon 11)g/L0.50ND 1,2,3-Trichloropropane g/L0.50ND 1,2,4-Trimethylbenzene g/L0.50ND 1,3,5-Trimethylbenzene g/L0.50ND Vinyl Acetate g/L20ND Vinyl Chloride g/L0.50ND m+p Xylene g/L1.0ND o-Xylene g/L0.50ND g/L 25.0 70-130Surrogate: 1,2-Dichloroethane-d4 12030.1 g/L 25.0 70-130Surrogate: Toluene-d8 94.923.7 g/L 25.0 70-130Surrogate: 4-Bromofluorobenzene 85.221.3 LCS (B255359-BS1) Prepared & Analyzed: 03/31/20 Acetone g/L50 100 70-13098.798.7 Benzene g/L0.50 10.0 70-13012612.6 Bromobenzene g/L0.50 10.0 70-13010310.3 Bromochloromethane g/L0.50 10.0 70-13012212.2 Bromodichloromethane g/L0.50 10.0 70-13093.09.30 Bromoform g/L0.50 10.0 70-13088.88.88 Bromomethane g/L1.0 10.0 60-14013213.2 2-Butanone (MEK)g/L5.0 100 70-130124124 n-Butylbenzene g/L0.50 10.0 70-13011911.9 sec-Butylbenzene g/L0.50 10.0 70-13011611.6 tert-Butylbenzene g/L0.50 10.0 70-13011111.1 Carbon Tetrachloride g/L0.50 10.0 70-13097.19.71 Chlorobenzene g/L0.50 10.0 70-13010310.3 Ethanol g/L50 100 70-13095.495.4 Chlorodibromomethane g/L0.50 10.0 70-13087.68.76 Chloroethane g/L0.50 10.0 60-14010610.6 Chloroform g/L0.50 10.0 70-13011411.4 Chloromethane g/L0.60 10.0 60-14012912.9 2-Chlorotoluene g/L0.50 10.0 70-13011211.2 4-Chlorotoluene g/L0.50 10.0 70-13010910.9 1,2-Dibromoethane (EDB)g/L0.50 10.0 70-13099.39.93 1,2-Dichlorobenzene g/L0.50 10.0 70-13010610.6 1,3-Dichlorobenzene g/L0.50 10.0 70-13011011.0 1,4-Dichlorobenzene g/L0.50 10.0 70-13010010.0 Dichlorodifluoromethane (Freon 12)g/L0.50 10.0 60-14085.88.58 1,1-Dichloroethane g/L0.50 10.0 70-13011511.5 1,2-Dichloroethane g/L0.50 10.0 70-13082.88.28 1,1-Dichloroethylene g/L0.50 10.0 70-13011111.1 cis-1,2-Dichloroethylene g/L0.50 10.0 70-13012212.2 trans-1,2-Dichloroethylene g/L0.50 10.0 70-13011111.1 1,2-Dichloropropane g/L0.50 10.0 70-13010910.9 1,3-Dichloropropane g/L0.50 10.0 70-13010310.3 2,2-Dichloropropane g/L0.50 10.0 70-13011111.1 1,1-Dichloropropene g/L0.50 10.0 70-13011511.5 cis-1,3-Dichloropropene g/L0.50 10.0 70-13010410.4 trans-1,3-Dichloropropene g/L0.50 10.0 70-13096.59.65 Page 40 of 49 Table of Contents 39 Spruce Street * East Longmeadow, MA 01028 * FAX 413/525-6405 * TEL. 413/525-2332 Result Limit Reporting Units Level Spike Result Source %REC %REC Limits RPD RPD Limit Notes Analyte Volatile Organic Compounds by GC/MS - Quality Control QUALITY CONTROL Batch B255359 - SW-846 5030B LCS (B255359-BS1) Prepared & Analyzed: 03/31/20 Diisopropyl Ether (DIPE)g/L0.50 10.0 70-13012412.4 Ethylbenzene g/L0.50 10.0 70-13010910.9 2-Hexanone (MBK)g/L5.0 100 70-13098.198.1 Isopropylbenzene (Cumene)g/L0.50 10.0 70-13097.89.78 p-Isopropyltoluene (p-Cymene)g/L0.50 10.0 70-13010210.2 Methyl tert-Butyl Ether (MTBE)g/L0.50 10.0 70-13010710.7 Methylene Chloride g/L5.0 10.0 70-13012512.5 4-Methyl-2-pentanone (MIBK)g/L5.0 100 70-130103103 Naphthalene g/L0.50 10.0 70-13011411.4 n-Propylbenzene g/L0.50 10.0 70-13010710.7 Styrene g/L0.50 10.0 70-13010010.0 1,1,2,2-Tetrachloroethane g/L0.50 10.0 70-13010410.4 Tetrachloroethylene g/L0.50 10.0 70-13098.89.88 Toluene g/L0.50 10.0 70-13010810.8 1,2,3-Trichlorobenzene g/L1.0 10.0 70-13011011.0 1,2,4-Trichlorobenzene g/L0.50 10.0 70-13010410.4 1,1,1-Trichloroethane g/L0.50 10.0 70-13010410.4 1,1,2-Trichloroethane g/L0.50 10.0 70-13096.99.69 Trichloroethylene g/L0.50 10.0 70-13099.59.95 Trichlorofluoromethane (Freon 11)g/L0.50 10.0 70-13093.99.39 1,2,3-Trichloropropane g/L0.50 10.0 70-13010410.4 1,2,4-Trimethylbenzene g/L0.50 10.0 70-13010810.8 1,3,5-Trimethylbenzene g/L0.50 10.0 70-13099.59.95 Vinyl Acetate g/L20 100 70-130121121 Vinyl Chloride g/L0.50 10.0 60-14011011.0 m+p Xylene g/L1.0 20.0 70-13011022.0 o-Xylene g/L0.50 10.0 70-13010710.7 g/L 25.0 70-130Surrogate: 1,2-Dichloroethane-d4 98.224.5 g/L 25.0 70-130Surrogate: Toluene-d8 10125.2 g/L 25.0 70-130Surrogate: 4-Bromofluorobenzene 10225.4 LCS Dup (B255359-BSD1) Prepared & Analyzed: 03/31/20 Acetone g/L50 100 2570-130101 2.14101 Benzene g/L0.50 10.0 2570-130125 0.55812.5 Bromobenzene g/L0.50 10.0 2570-130103 0.68010.3 Bromochloromethane g/L0.50 10.0 2570-130118 3.0811.8 Bromodichloromethane g/L0.50 10.0 2570-13091.5 1.639.15 Bromoform g/L0.50 10.0 2570-13085.8 3.448.58 Bromomethane g/L1.0 10.0 2560-140125 5.5112.5 2-Butanone (MEK)g/L5.0 100 2570-130126 1.57126 n-Butylbenzene g/L0.50 10.0 2570-130118 1.2711.8 sec-Butylbenzene g/L0.50 10.0 2570-130113 3.0611.3 tert-Butylbenzene g/L0.50 10.0 2570-130104 6.2210.4 Carbon Tetrachloride g/L0.50 10.0 2570-13093.8 3.469.38 Chlorobenzene g/L0.50 10.0 2570-130102 0.68510.2 Ethanol g/L50 100 2570-13081.4 15.881.4 Chlorodibromomethane g/L0.50 10.0 2570-13087.9 0.3428.79 Chloroethane g/L0.50 10.0 2560-140106 0.66010.6 Chloroform g/L0.50 10.0 2570-130109 4.8310.9 Chloromethane g/L0.60 10.0 2560-140128 1.0112.8 2-Chlorotoluene g/L0.50 10.0 2570-130104 7.6210.4 4-Chlorotoluene g/L0.50 10.0 2570-130105 3.2710.5 Page 41 of 49 Table of Contents 39 Spruce Street * East Longmeadow, MA 01028 * FAX 413/525-6405 * TEL. 413/525-2332 Result Limit Reporting Units Level Spike Result Source %REC %REC Limits RPD RPD Limit Notes Analyte Volatile Organic Compounds by GC/MS - Quality Control QUALITY CONTROL Batch B255359 - SW-846 5030B LCS Dup (B255359-BSD1) Prepared & Analyzed: 03/31/20 1,2-Dibromoethane (EDB)g/L0.50 10.0 2570-13098.2 1.119.82 1,2-Dichlorobenzene g/L0.50 10.0 2570-130102 3.3710.2 1,3-Dichlorobenzene g/L0.50 10.0 2570-130107 2.6810.7 1,4-Dichlorobenzene g/L0.50 10.0 2570-130102 1.9710.2 Dichlorodifluoromethane (Freon 12)g/L0.50 10.0 2560-14085.4 0.4678.54 1,1-Dichloroethane g/L0.50 10.0 2570-130120 4.4112.0 1,2-Dichloroethane g/L0.50 10.0 2570-13085.5 3.218.55 1,1-Dichloroethylene g/L0.50 10.0 2570-130111 0.54111.1 cis-1,2-Dichloroethylene g/L0.50 10.0 2570-130120 1.8212.0 trans-1,2-Dichloroethylene g/L0.50 10.0 2570-130118 6.9011.8 1,2-Dichloropropane g/L0.50 10.0 2570-130109 0.091710.9 1,3-Dichloropropane g/L0.50 10.0 2570-130102 0.68410.2 2,2-Dichloropropane g/L0.50 10.0 2570-130111 0.36111.1 1,1-Dichloropropene g/L0.50 10.0 2570-130122 5.9112.2 cis-1,3-Dichloropropene g/L0.50 10.0 2570-130105 0.85910.5 trans-1,3-Dichloropropene g/L0.50 10.0 2570-130100 4.0610.0 Diisopropyl Ether (DIPE)g/L0.50 10.0 2570-130125 0.96612.5 Ethylbenzene g/L0.50 10.0 2570-130102 6.1510.2 2-Hexanone (MBK)g/L5.0 100 2570-130103 4.48103 Isopropylbenzene (Cumene)g/L0.50 10.0 2570-13094.9 3.019.49 p-Isopropyltoluene (p-Cymene)g/L0.50 10.0 2570-13099.4 2.889.94 Methyl tert-Butyl Ether (MTBE)g/L0.50 10.0 2570-130108 0.65010.8 Methylene Chloride g/L5.0 10.0 2570-130122 2.5112.2 4-Methyl-2-pentanone (MIBK)g/L5.0 100 2570-130108 4.47108 Naphthalene g/L0.50 10.0 2570-130111 2.9411.1 n-Propylbenzene g/L0.50 10.0 2570-130103 3.8210.3 Styrene g/L0.50 10.0 2570-13096.6 3.969.66 1,1,2,2-Tetrachloroethane g/L0.50 10.0 2570-130102 1.6510.2 Tetrachloroethylene g/L0.50 10.0 2570-13097.3 1.539.73 Toluene g/L0.50 10.0 2570-130108 0.18510.8 1,2,3-Trichlorobenzene g/L1.0 10.0 2570-130102 7.1810.2 1,2,4-Trichlorobenzene g/L0.50 10.0 2570-130103 0.96310.3 1,1,1-Trichloroethane g/L0.50 10.0 2570-13098.3 5.739.83 1,1,2-Trichloroethane g/L0.50 10.0 2570-130103 5.7110.3 Trichloroethylene g/L0.50 10.0 2570-13096.3 3.279.63 Trichlorofluoromethane (Freon 11)g/L0.50 10.0 2570-13096.7 2.949.67 1,2,3-Trichloropropane g/L0.50 10.0 2570-130105 0.66810.5 1,2,4-Trimethylbenzene g/L0.50 10.0 2570-130105 2.7210.5 1,3,5-Trimethylbenzene g/L0.50 10.0 2570-13095.4 4.219.54 Vinyl Acetate g/L20 100 2570-130125 2.72125 Vinyl Chloride g/L0.50 10.0 2560-140111 0.54411.1 m+p Xylene g/L1.0 20.0 2570-130105 4.5521.0 o-Xylene g/L0.50 10.0 2570-130100 6.2810.0 g/L 25.0 70-130Surrogate: 1,2-Dichloroethane-d4 97.024.2 g/L 25.0 70-130Surrogate: Toluene-d8 10225.5 g/L 25.0 70-130Surrogate: 4-Bromofluorobenzene 98.524.6 Page 42 of 49 Table of Contents 39 Spruce Street * East Longmeadow, MA 01028 * FAX 413/525-6405 * TEL. 413/525-2332 *QC result is outside of established limits. Wide recovery limits established for difficult compound. Wide RPD limits established for difficult compound. #Data exceeded client recommended or regulatory level Percent recoveries and relative percent differences (RPDs) are determined by the software using values in the calculation which have not been rounded. No results have been blank subtracted unless specified in the case narrative section. FLAG/QUALIFIER SUMMARY Detected but below the Reporting Limit (lowest calibration standard); therefore, result is an estimated concentration (CLP J-Flag). J Elevated reporting limit due to high concentration of target compounds.RL-11 [TOC_1]Flag/Qualifier Summary[TOC] Page 43 of 49 Table of Contents 39 Spruce Street * East Longmeadow, MA 01028 * FAX 413/525-6405 * TEL. 413/525-2332 CertificationsAnalyte CERTIFICATIONS Certified Analyses included in this Report SM21-22 6200B in Water NCAcetone NCBenzene NCBromobenzene NCBromochloromethane NCBromodichloromethane NCBromoform NCBromomethane NC2-Butanone (MEK) NCn-Butylbenzene NCsec-Butylbenzene NCtert-Butylbenzene NCCarbon Tetrachloride NCChlorobenzene NCEthanol NCChlorodibromomethane NCChloroethane NCChloroform NCChloromethane NC2-Chlorotoluene NC4-Chlorotoluene NC1,2-Dibromoethane (EDB) NC1,2-Dichlorobenzene NC1,3-Dichlorobenzene NC1,4-Dichlorobenzene NCDichlorodifluoromethane (Freon 12) NC1,1-Dichloroethane NC1,2-Dichloroethane NC1,1-Dichloroethylene NCcis-1,2-Dichloroethylene NCtrans-1,2-Dichloroethylene NC1,2-Dichloropropane NC1,3-Dichloropropane NC2,2-Dichloropropane NC1,1-Dichloropropene NCcis-1,3-Dichloropropene NCtrans-1,3-Dichloropropene NCDiisopropyl Ether (DIPE) NCEthylbenzene NC2-Hexanone (MBK) NCIsopropylbenzene (Cumene) NCp-Isopropyltoluene (p-Cymene) NCMethyl tert-Butyl Ether (MTBE) NCMethylene Chloride NC4-Methyl-2-pentanone (MIBK) NCNaphthalene NCn-Propylbenzene NCStyrene [TOC_1]Certifications[TOC] Page 44 of 49 Table of Contents 39 Spruce Street * East Longmeadow, MA 01028 * FAX 413/525-6405 * TEL. 413/525-2332 CertificationsAnalyte CERTIFICATIONS Certified Analyses included in this Report SM21-22 6200B in Water NC1,1,2,2-Tetrachloroethane NCTetrachloroethylene NCToluene NC1,2,3-Trichlorobenzene NC1,2,4-Trichlorobenzene NC1,1,1-Trichloroethane NC1,1,2-Trichloroethane NCTrichloroethylene NCTrichlorofluoromethane (Freon 11) NC1,2,3-Trichloropropane NC1,2,4-Trimethylbenzene NC1,3,5-Trimethylbenzene NCVinyl Acetate NCVinyl Chloride NCm+p Xylene NCo-Xylene The CON-TEST Environmental Laboratory operates under the following certifications and accreditations: Code Description Number Expires 100033AIHA-LAP, LLC - ISO17025:2017AIHA 03/1/2022 M-MA100Massachusetts DEPMA 06/30/2020 PH-0567Connecticut Department of Publilc HealthCT 09/30/2021 10899 NELAPNew York State Department of HealthNY 04/1/2021 2516 NELAPNew Hampshire Environmental LabNH-S 02/5/2021 LAO00112Rhode Island Department of HealthRI 12/30/2020 652North Carolina Div. of Water QualityNC 12/31/2020 MA007 NELAPNew Jersey DEPNJ 06/30/2020 E871027 NELAPFlorida Department of HealthFL 06/30/2020 LL015036Vermont Department of Health Lead LaboratoryVT 07/30/2020 2011028State of MaineME 06/9/2021 460217Commonwealth of VirginiaVA 12/14/2020 2557 NELAPNew Hampshire Environmental LabNH-P 09/6/2020 VT-255716Vermont Department of Health Drinking WaterVT-DW 06/12/2020 25703North Carolina Department of HealthNC-DW 07/31/2020 68-05812Commonwealth of Pennsylvania DEPPA 06/30/2020 Page 45 of 49 Table of Contents Page 46 of 49 Table of Contents Page 47 of 49 Table of Contents Page 48 of 49 Table of Contents Page 49 of 49 Table of Contents