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HomeMy WebLinkAboutFA-2633_29602_CA_MRP_20231012 East Coast Environmental, P.A. 3815 Junction Boulevard Raleigh, NC 27603 (919) 772-0268 Eastcoastenv.com October 12, 2023 Mr. Ken Currie NC-DEQ UST Section Fayetteville Regional Office Systel Building Suite 714 225 Green Street Fayetteville, NC 28301 Re: Groundwater Monitoring Report prepared for The Grocery Bag Highway 42 Clayton, North Carolina (Site) Incident # 29602 Dear Mr. Currie, This correspondence is to present to you one copy of the attached Groundwater Monitoring Report for your review. Should you have any questions, comments, or require additional information, please feel free to contact me at your earliest opportunity. Cordially, East Coast Environmental, P.A. Tom Will Project Manager attachment East Coast Environmental, P.A. 3815 Junction Boulevard Raleigh, NC 27603 (919) 772-0268 Eastcoastenv.com REPORT FOR GROUNDWATER MONITORING GROCERY BAG 4879-A HIGHWAY 42 EAST CLAYTON, JOHNSTON COUNTY, NORTH CAROLINA FACILITY I.D. 0-032284 GROUNDWATER INCIDENT NUMBER: 29602 October 12, 2023 Responsible Party: Grocery Bag CITGO c/o Donna Fitzgerald 4879-A Highway 42 East Clayton, North Carolina 27520 (919) 553-4088 Current Property Owner: Percy Flowers Store, LLC 4880 NC 42 East Clayton, NC 27520 (919) 553-3084 Consultant: East Coast Environmental, P.A. 3815 Junction Blvd. Raleigh, North Carolina 27603 (919) 772-0268 Release Discovery Date: September 2009 Cause of Release: Leaking flex pipe connector in 12,000 UST sump UST Sizes and Contents: (2) 8,000-Gallon Gasoline USTs, (1) 12,000-Gallon Gasoline UST Latitude: 35o 39.247’, Longitude: 78o 20.674’ Report for Groundwater Monitoring Grocery Bag Clayton, North Carolina East Coast Environmental, P.A. 3815 Junction Blvd. Raleigh, North Carolina 27603 (919) 772-0268 Fax: (919) 772-0468 2 Groundwater Monitoring Report A Title Page A.1 Site Identification Date of Report: October 12, 2023 Facility I.D.: 0-032284 UST Incident Number: 29602 Site Name: The Grocery Bag Site Address: 4879-A Highway 42 East Nearest City/Town: Clayton County: Johnston Location Method: Topographic Maps/GPS Latitude: 35 39.247’ Longitude: 78 20.674’ A.2 Contact Information UST Owner: The Grocery Bag CITGO c/o Donna Fitzgerald Address: 4879-A Highway 42 East, Clayton, NC 27520 Phone: (919) 553-4088 UST Operator: The Grocery Bag CITGO c/o Donna Fitzgerald Address: 4879-A Highway 42 East, Clayton, NC 27520 Phone: (919) 553-4088 Property Owner: Percy Flowers Store, LLC Address: 4880 NC 42 East, Clayton, NC 27520 Phone: (919) 553-3084 Property Occupants: The Grocery Bag CITGO c/o Tommy Fitzgerald Address: 4879-A Highway 42 East, Clayton, NC 27520 Phone: (919) 553-4088 Consultant/Contractor: East Coast Environmental, P.A. Address: 3815 Junction Blvd., Raleigh, NC 27603 Phone: (919) 772-0268 ______ Analytical Laboratory: Environmental Conservation Laboratories Address: 102-A Woodwinds Industrial Court, Cary, NC 27511 Phone: (919) 467-3090 ______ A.3 Release Information Date Discovered: September 2009 Estimated Quantity of Release: unknown Cause of Release: Leaking flex pipe connector in 12,000 UST sump Source of Release (e.g., Piping/UST): Piping Sizes and contents of UST system(s) from which the release occurred): (1) 12,000-gallon gasoline I, Thomas R. Will a Licensed Geologist for East Coast Environmental, P.A. do certify that the information contained in this report is correct and accurate to the best of my knowledge. East Coast Environmental, P.A. is licensed to practice geology in North Carolina. The certification number for East Coast Environmental, P.A. is C-136 Report for Groundwater Monitoring Grocery Bag Clayton, North Carolina East Coast Environmental, P.A. 3815 Junction Blvd. Raleigh, North Carolina 27603 (919) 772-0268 Fax: (919) 772-0468 3 Table of Contents A TITLE PAGE ..............................................................................................................2 A.1 SITE IDENTIFICATION ..................................................................................................2 A.2 CONTACT INFORMATION .............................................................................................2 A.3 RELEASE INFORMATION ..............................................................................................2 1.0 INTRODUCTION....................................................................................................5 1.1 PREVIOUS GROUNDWATER SAMPLING EVENTS ..........................................................6 1.1.1 Comprehensive Site Assessment ..........................................................................6 JUNE 2016 GROUNDWATER MONITORING EVENT .................................................................8 MARCH 2022 GROUNDWATER MONITORING EVENT .............................................................9 JUNE 2023 GROUNDWATER MONITORING EVENT ...............................................................10 1.2.1 Groundwater Sampling Event – September 18, 2023 .......................................10 1.2.2 Well Gauging ....................................................................................................10 1.2.3.2 Well Purging ..................................................................................................10 1.2.3.3 Groundwater Sample Collection ....................................................................11 1.2.3.4 Sample Storage and Transport .......................................................................11 1.2.3.6 Analytical Methodology ................................................................................11 1.2.2 Analytical Results – Groundwater Samples (September 18, 2023) ..................12 1.2.2.1 SM6200B ......................................................................................................12 1.2.2.2 Surface Water Sampling Results ..................................................................13 1.3 CURRENT PLUME INFORMATION ...............................................................................13 1.4 PROPOSED REMEDIAL ACTIONS ................................................................................13 1.5 GROUNDWATER CONDITIONS ...................................................................................14 1.5.1 Proximity to Potential Receptors ......................................................................14 1.5.2 Groundwater Flow ............................................................................................14 2.0 CONCLUSIONS AND RECOMMENDATIONS ...............................................15 Report for Groundwater Monitoring Grocery Bag Clayton, North Carolina East Coast Environmental, P.A. 3815 Junction Blvd. Raleigh, North Carolina 27603 (919) 772-0268 Fax: (919) 772-0468 4 APPENDICES Section A Figures Section B Tables and Charts Section C Analytical Data- September 2023 groundwater sampling event LIST OF FIGURES Figure 1 Topographic Site Location Map Figure 2 Benzene Isoconcentration Map (µg/L) – September 2023 Figure 3 Naphthalene Isoconcentration Map (µg/L) – September 2023 Figure 4 Groundwater Hydraulic Gradient Map (ft.) – September 2023 LIST OF TABLES Table 1 Analytical Data-Groundwater (µg/l) – September 2023 Table 2 Historical Analytical Data for Groundwater Samples Table 3 Groundwater Level Measurements (ft) – September 2023 Time vs. Contamination Charts (MW-1, MW-2, MW-5) Report for Groundwater Monitoring Grocery Bag Clayton, North Carolina East Coast Environmental, P.A. 3815 Junction Blvd. Raleigh, North Carolina 27603 (919) 772-0268 Fax: (919) 772-0468 5 1.0 INTRODUCTION At the request of Donna Fitzgerald of the Grocery Bag, and in accordance with the provisions of North Carolina Administrative Code, Title 15A, Subchapter 2L, Section .0110 (Monitoring), East Coast Environmental, P.A. (ECE), of Raleigh, North Carolina, has prepared this “Report for Groundwater Monitoring” for petroleum contaminated groundwater on and adjacent to the Grocery Bag (Facility ID # 0-032284); hereinafter, referred to as the Site, located at 4879-A Highway 42 East, Clayton, Wake County, North Carolina (Section A, Figure 1). A Site map (Section A, Figure 2) shows the location of the Site & the locations of all monitoring wells associated with the Site, as well as the UST locations. The Site contains three petroleum Underground Storage Tank (UST) systems that were installed for the retail sale of gasoline. The Site’s UST systems were installed during 1993 and included two 8,000- gallon gasoline tanks and one 12,000-gallon gasoline tank that are currently registered as being owned by the Grocery Bag. See Section A, Figure 2 for the Site map indicating UST system locations. ECE mobilized to the Site on September 3, 2009 for the purpose of performing a Site check. The suspected release was located on top of the 12,000-gallon tank and therefore it was determined that groundwater samples should be collected in areas as close to the tank as possible in lieu of the collection of samples adjacent to the product lines and dispensers. Analytical results for the groundwater samples submitted by ECE for laboratory analysis by EPA method 6200B detected targeted volatile organic compounds at concentrations more than their maximum allowable levels in groundwater as set forth in 15A NCAC 2L .0202. The presence of petroleum related contaminants at elevated levels indicated that a petroleum release had occurred. However, the source of the petroleum release (leaking flex connector in 12,000-gallon UST sump) was identified and repaired. After the Site Check, the Grocery Bag contracted ECE to complete a Phase I Limited Site Assessment (Phase II LSA) Report (dated December 18, 2009). The North Carolina Department of Environment and Natural Resources-Fayetteville Regional Office (NCDENR-FaRO) issued a September 29, 2014 Notice of Regulatory Requirements (NORR) letter to Mr. Tommy Fitzgerald of the Grocery Bag to comply with the requirements of 15A NCAC 2N .0706, 15A NCAC 2L .0106(c) and 2L .0106(g). Mr. Fitzgerald responded by directing ECE to complete a Comprehensive Site Assessment (CSA) report (dated December 14, 2015) that was subsequently reviewed and approved by the NC-DEQ-FaRO. After review, the NC-DEQ-FaRO requested that Mr. Fitzgerald perform a Report for Groundwater Monitoring Report for Groundwater Monitoring Grocery Bag Clayton, North Carolina East Coast Environmental, P.A. 3815 Junction Blvd. Raleigh, North Carolina 27603 (919) 772-0268 Fax: (919) 772-0468 6 that was completed during 2016. This most recent 2023 groundwater monitoring event was requested by Mr. Ken Curry of the NC-DEQ Fayetteville Regional Office in a Notice of Regulatory Requirement letter issued to Donna Fitzgerald on August 23, 2023. Currently the Site is classified as “intermediate risk” due to the presence of surface water bodies located within 500-feet of the Site in two directions. 1.1 Previous Groundwater Sampling Events 1.1.1 Comprehensive Site Assessment Historical groundwater sampling events occurred between March and October 2015 after the NC-DENR instructed Mr. Fitzgerald to complete a CSA. ECE mobilized to the Site on March 12-13, 2015 to install four additional permanent monitoring wells designated as MW-2, MW-3, MW-4, and MW-5 all of which were located on-Site. A summary of the well construction details is included in Section B Table 3. ECE returned to the Site on March 18, 2015 to sample the five monitoring wells installed to date for inclusion in this CSA. The groundwater samples collected from the monitoring wells were submitted for analysis by EPA Methods 6200B (volatile organic compounds), 504.1 (EDB), 3030c (total lead) and the MADEP-VPH methods. Data for the groundwater samples revealed the presence of targeted compounds in the samples collected from all five groundwater monitoring wells. Samples collected from these wells were also found to contain one or more targeted contaminants at levels above their maximum allowable concentrations in groundwater as defined by 15A NCAC 2L .0202. May 17, 2015 Groundwater Monitoring Event The next phase of groundwater sampling was conducted during May 2015 for completion of the CSA and included the installation of additional monitoring wells MW-6 and MW-7 at on-Site locations. A summary of the well construction details is included in Section B Table 3. These wells were required after reviewing the results for the March 2015 monitoring event which revealed that the groundwater contaminant plume may have migrated offsite and under NC 42 to the south. Therefore, to complete the CSA groundwater samples were subsequently collected from monitoring wells MW-6 and MW-7 after their installation. The groundwater samples collected from the monitoring wells were submitted for analysis by EPA Methods 6200B (volatile organic compounds), 504.1 (EDB), 3030c (total lead) and the MADEP-VPH method. Analytical results for the samples collected from MW-6 showed no Report for Groundwater Monitoring Grocery Bag Clayton, North Carolina East Coast Environmental, P.A. 3815 Junction Blvd. Raleigh, North Carolina 27603 (919) 772-0268 Fax: (919) 772-0468 7 contaminants targeted by any of these test methods while the samples collected from MW-7 showed numerous targeted contaminants at levels above their maximum allowable concentrations in groundwater as defined by 15A NCAC 2L .0202. The analytical results for this sampling event confirm that the groundwater contaminant plume has migrated offsite and under NC 42 to the south and defined its extent to the east. In summary, as of May 2015 data for the groundwater samples obtained from wells MW-1, MW-3, MW-4, MW-5, and MW-7 showed the presence of targeted volatile organic compounds in these samples at levels above their maximum allowable concentrations in groundwater as defined by 15A NCAC 2L .0202. Analytical results for the samples collected from MW-2 and MW-6 were all below their maximum allowable concentrations in groundwater as defined by 15A NCAC 2L .0202. September/October 2015 Groundwater Monitoring Event Th next phase of groundwater sampling was conducted during September and October 2015 for completion of the CSA and included the installation of shallow wells MW-8, MW-9 and MW-10 and deep profile well DW-1. MW-8 was installed on-Site to define the western extent of groundwater contamination while MW-9 and MW-10 were installed off-Site and south of NC 42 to define the downgradient extent of groundwater contamination. Finally, DW-1 was installed on-Site and adjacent to MW-7 at the location indicated in Figure 2 to define the horizontal and vertical extent of groundwater contamination. Therefore, to complete the CSA groundwater samples were subsequently collected from monitoring wells MW-8, MW-9, MW-10, and DW-1. The groundwater samples collected from these monitoring wells were submitted for analysis by EPA Methods 6200B (volatile organic compounds), 504.1 (EDB), 3030c (total lead) and the MADEP-VPH method. Analytical results for the groundwater samples obtained from wells MW-8 and MW-9 showed the presence of targeted volatile organic compounds in these samples at levels above their maximum allowable concentrations in groundwater as defined by 15A NCAC 2L .0202. In summary, data for the groundwater samples obtained from wells MW-1, MW-3, MW-4, MW-5, MW- 7, MW-8, and MW-9 showed the presence of volatile organic compounds in these samples at levels above their maximum allowable concentrations in groundwater as defined by 15A NCAC 2L .0202 and 10 times the 15A NCAC 2B Standards. Section B, Table 2 is a summary of the combined groundwater analytical results for all historical sampling events. Report for Groundwater Monitoring Grocery Bag Clayton, North Carolina East Coast Environmental, P.A. 3815 Junction Blvd. Raleigh, North Carolina 27603 (919) 772-0268 Fax: (919) 772-0468 8 Upon review of the data obtained by the CSA activities described above, it was evident that the horizontal and vertical extent of the groundwater contaminant plume was adequately defined to the 15A NCAC 2L standards for groundwater and 10 times the surface water standards wet forth at 15A NCAC 2B. The NC-DEQ followed up with a request to complete a monitoring event which included all the wells installed to date be performed during June 2016. June 2016 Groundwater Monitoring Event Groundwater samples were collected from monitoring wells MW-1, 3, 4, 5, 6, 7, 8, 9, 10, and DW-1 on June 13, 2016. All samples were collected using disposable PE bailers after the monitoring wells were purged of either a minimum of three volumes of water calculated to be standing in the wells or purged to dryness (whichever occurred first). Samples collected from all wells were submitted for chemical analysis by SM6200B. Results of chemical testing by SM6200B for groundwater samples collected from the monitoring wells located on and around the Site showed the presence of targeted compounds in samples retained from monitoring wells MW-1, MW-3, MW-4, MW-5, MW-7, MW-8, MW-9, and DW-1. Numerous compounds were detected at levels more than their respective Maximum Allowable Concentrations: • Benzene was present in samples from wells MW-1, MW-3, MW-4, MW-5, MW-7, MW-8, MW- 9 and DW-1 at concentrations of 62, 83, 11, 520, 1,500, 3,600, 35 and 1.8 µg/L respectively, • Ethylbenzene was found in samples from well MW-7 (1,500 µg/L), • Isopropyl benzene was shown in well MW-7 at a level of 86 µg/L, • MTBE was indicated in samples from MW-1 and MW-7 at concentrations of 30 and 120 µg/L, • n-Propyl benzene was shown in wells MW-7 and MW-8 (360 and 140 ug/L), • Naphthalene was found in samples from wells MW-1, MW-3, MW-5, MW-7, MW-8 and MW-9 at levels of 99, 16, 150, 660, 380 and 57 µg/L, respectively, • Toluene was detected in MW-7 at a level of 1,000 ug/l, • 1,3,5-Trimethylbenzene was shown present in well MW-7 (800 ug/l), • 1,2,4-Trimethylbenzene was indicated in wells MW-7 and MW-8 (3,100 and 410 ug/l), • Total Xylenes were detected in the sample from MW-7 at a level of 9,200 µg/l. Report for Groundwater Monitoring Grocery Bag Clayton, North Carolina East Coast Environmental, P.A. 3815 Junction Blvd. Raleigh, North Carolina 27603 (919) 772-0268 Fax: (919) 772-0468 9 March 2022 Groundwater Monitoring Event The March 2022 groundwater monitoring event was requested by Mr. Ken Curry of the NC-DEQ Fayetteville Regional Office in a Notice of Regulatory Requirement letter issued to Donna Fitzgerald on February 25, 2022. In response, groundwater samples were collected from monitoring wells MW-1, 2, 3, 4, 5, 7, 9 and 10 on March 14, 2022. Monitoring wells MW-6, MW-8 and DW-1 were not included because these wells had been destroyed as the result of recent road widening activities in front of the store building. The remaining wells that could be included in the sampling event were sampled using disposable PE bailers after the monitoring wells were purged of either a minimum of three volumes of water calculated to be standing in the wells or purged to dryness (whichever occurred first). Samples collected from all wells were submitted for chemical analysis by SM6200B. Results of chemical testing by SM6200B for groundwater samples collected from the monitoring wells located on and around the Site showed the presence of targeted compounds in samples retained from monitoring wells MW-1, MW-2, MW-3, MW-4, MW-5, MW-7, MW-8, and MW-9. Numerous compounds were detected at levels more than their respective Maximum Allowable Concentrations: • Benzene was present in samples from wells MW-1, MW-2, MW-3, MW-4, MW-5, MW-7, and MW-9 at concentrations of 890, 45, 11, 1.8, 200, and 360 µg/L respectively; • Ethylbenzene was found in the sample from well MW-7 (1,300 µg/L); • Isopropyl-benzene was shown in well MW-7 at a level of 87 µg/L; • MTBE was indicated in the sample from MW-7 at a concentration of 22 µg/L; • n-Propylbenzene was shown in well MW-7 (260 ug/L); • Naphthalene was found in samples from wells MW-1, MW-3, MW-4, MW-5, MW-7, and MW-9 at levels of 170, 20, 11, 150, 780 and 60 µg/L, respectively; • 1,2,4-Trimethylbenzene was indicated in well MW-7 at 1,600 ug/l; • Total Xylenes were detected in the sample from MW-7 at a level of 4,200 µg/L; • Tert-amyl Alcohol was found in samples from wells MW-1, MW-3, MW-4, MW-5, and MW-9 at levels of 1,000, 390, 820, 760, and 94 µg/L, respectively. Report for Groundwater Monitoring Grocery Bag Clayton, North Carolina East Coast Environmental, P.A. 3815 Junction Blvd. Raleigh, North Carolina 27603 (919) 772-0268 Fax: (919) 772-0468 10 June 2023 Groundwater Monitoring Event 1.2.1 Groundwater Sampling Event – September 18, 2023 As discussed previously this most recent September 2023 groundwater monitoring event was requested by Mr. Ken Curry of the NC-DEQ Fayetteville Regional Office in a Notice of Regulatory Requirement letter issued to Donna Fitzgerald on August 23, 2023. In response, groundwater samples were collected from monitoring wells MW-1, 2, 5, 9 and 10 on September 18, 2023. Monitoring wells MW-3, MW-4, MW-6, MW-7, MW-8, and DW-1 were not included because these wells had been destroyed as the result of recent road widening activities in front of the store building. The remaining wells that could be included in the sampling event were sampled using disposable PE bailers after the monitoring wells were purged of either a minimum of three volumes of water calculated to be standing in the wells or purged to dryness (whichever occurred first). Samples collected from all wells were submitted for chemical analysis by SM6200B. 1.2.2 Well Gauging Well gauging was performed to determine the groundwater elevation within each well, and for the calculation of appropriate purge volume(s) for each well prior to sampling. After decontamination utilizing an Alconox® and deionized water solution, an electronic water level indicator was lowered into each well to determine the depth to groundwater beneath the top of casing (TOC) of each well. Each well associated with the Site was gauged on September 18, 2023. Depths to groundwater ranged from 2.05 feet (ft) in MW-1 to 3.08 ft in MW-5. Based on gauged of the wells, groundwater was determined to flow from the north to the south through the Site, with a slight westerly component. Figure 4 depicts the gradient based on the September 2023 gauging event. This flow direction is in general agreement with the groundwater flow direction established during the 2015, 2016 and 2022 monitoring events 1.2.3.2 Well Purging The groundwater within each well included in this sampling event was purged of a pre-determined volume to allow for infiltration of representative groundwater, and thus collection of representative groundwater samples. All wells were purged of a minimum of three well volumes prior to sampling, unless the well was purged to a dry state prior to the removal of three volumes of water. After purging, the groundwater level within each well was allowed to recharge to within 80% of the static level initially observed before sampling of the well(s) was performed. Purging of each well was accomplished using separate disposable polyethylene (PE) bailers. Report for Groundwater Monitoring Grocery Bag Clayton, North Carolina East Coast Environmental, P.A. 3815 Junction Blvd. Raleigh, North Carolina 27603 (919) 772-0268 Fax: (919) 772-0468 11 1.2.3.3 Groundwater Sample Collection Representative groundwater samples were collected from each well targeted for sampling after proper purging and recharge of the wells. The collection of groundwater samples was performed in accordance with established EPA and North Carolina Division of Waste Management (NC-DWM) protocols for the collection of groundwater samples. ECE modeled the sampling procedures after those set forth in the “Underground Storage Tank Section Guidelines for Site Checks, Tank Closure, and Initial Response and Abatement” prepared by the NC-DEQ-UST Section. 1.2.3.4 Sample Storage and Transport All samples collected during this sampling event were properly contained in pre-washed, laboratory grade sample containers. The sample containers utilized in this sampling event were provided by Environmental Conservation Laboratories, Inc. (ENCO), a licensed analytical laboratory located in Cary, NC (NC-DWQ certification# 591). Samples collected for volatile organic analyses (SM6200B) were enclosed in 40-ml "VOAs", pre- preserved with 1:1 hydrochloric acid (HCL). The headspace was removed from the samples prior to capping. After the collection of each sample, all containers were properly labeled with the sample designation, sample date and time, and analysis requested. Information was recorded on a chain-of-custody form, identifying each sample, and the analysis (or analyses) requested for the sample(s). The samples were then placed in a cooler on ice pending delivery to the laboratory. The samples collected on September 18, 2023 were relinquished to the lab courier on September 19, 2023 with all appropriate chain-of-custody documentation. 1.2.3.6 Analytical Methodology Groundwater samples collected from the monitoring wells located on and adjacent to the Site were analyzed for petroleum hydrocarbons and related petroleum additives. Samples collected from monitoring wells sampled during the September 2023 sampling event were analyzed by SM6200B, a US Report for Groundwater Monitoring Grocery Bag Clayton, North Carolina East Coast Environmental, P.A. 3815 Junction Blvd. Raleigh, North Carolina 27603 (919) 772-0268 Fax: (919) 772-0468 12 EPA approved method for testing of groundwater samples. SM6200B targets low-boiling-point volatile petroleum hydrocarbons, such as those typical of gasoline and other light hydrocarbons. Samples retained from the pond across NC Highway 42 were also analyzed by SM6200B. The pond sample location is included in Figure 2. 1.2.2 Analytical Results – Groundwater Samples (September 18, 2023) 1.2.2.1 SM6200B Results of chemical testing by SM6200B for groundwater samples collected from the monitoring wells located on and around the Site showed the presence of targeted compounds in samples retained from monitoring wells MW-1, MW-2, MW-5, and MW-9 (Table 1). Numerous compounds were detected at levels more than their respective Maximum Allowable Concentrations: • Benzene was present in samples from wells MW-1, MW-2, and MW-5 at concentrations of 2,870, 927 and 113 µg/L respectively; • Isopropyl-ether was shown in well MW-1 at a level of 98.7 µg/L; • Naphthalene was found in samples from wells MW-1, MW-2, MW-5, and MW-9 at levels of 154, 13.5, 107 and 27.7 µg/L, respectively; • Tert-amyl Alcohol was found in samples from wells MW-1 and MW-5 at levels of 809 and 236 µg/L, respectively. Data for several samples also revealed the presence of targeted compounds at levels beneath their respective Maximum Allowable Concentrations: • Ethylbenzene - shown in MW-1, MW-2, and MW-5; • Isopropyl-benzene - found MW-5; • MTBE found in MW-5, • Toluene – found in MW-2, MW-5, and MW-9; • n-Propylbenzene - present in MW-1, MW-5, and MW-9; • Xylenes - detected in MW-1, MW-2, MW-5, and MW-9; • Tert-Butyl Alcohol shown in MW-5; Report for Groundwater Monitoring Grocery Bag Clayton, North Carolina East Coast Environmental, P.A. 3815 Junction Blvd. Raleigh, North Carolina 27603 (919) 772-0268 Fax: (919) 772-0468 13 Figures 2, and 3 show the estimated extents of benzene and naphthalene in groundwater based on the September 2023 sampling event. The laboratory analytical reports for this sampling event are presented as an attachment in Section C while a summary of the laboratory results can be found in Section B, Table 1. Section B, Table 2 includes a summary of historical analytical results for all monitoring wells associated with the Site. Three time vs. historical analytical data charts have been prepared for groundwater monitoring wells MW-1, MW-2, and MW-5. Except for the chart for MW-5, the charts for MW-1 and MW-2 indicate that overall contaminant concentrations for the September 2023 monitoring event have increased when compared to historical groundwater monitoring events completed during 2015, 2016 and 2022. The data charts are included in the back of Section B. 1.2.2.2 Surface Water Sampling Results No sample was collected from the pond located across Highway 42 for this groundwater monitoring event. 1.3 Current Plume Information Based on analytical data for the September 2023 groundwater sampling event levels of one or more compounds were present in samples collected from MW-1, MW-2, and MW-5 at levels more than their Maximum Allowable Concentrations defined by the 2L Standards. The estimated area encompassed by the extent of 2L Standard violations in the surficial aquifer based on the September 2023 groundwater data measured as much as 56,600 square feet, or 1.3 acres. Figures 2 and 3 depict the approximate lateral extent of 2L Standard violations on and in the vicinity of the Site based on the September 2023 sampling event. Contaminant concentrations detected in the wells related to the release at the site are generally are lower than those from the 2015 and 2016 sampling events. 1.4 Proposed Remedial Actions At this time there has been no Corrective Action Plan (CAP) prepared for remediation of soils and groundwater at the Site. Report for Groundwater Monitoring Grocery Bag Clayton, North Carolina East Coast Environmental, P.A. 3815 Junction Blvd. Raleigh, North Carolina 27603 (919) 772-0268 Fax: (919) 772-0468 14 1.5 Groundwater Conditions 1.5.1 Proximity to Potential Receptors There are no longer any water supply wells located within a 1,000-foot radius of the Site. However, the Site is currently classified as “intermediate risk” due to the presence of surface water bodies located within 500-feet of the Site in two directions. See Section A, Figure 1. 1.5.2 Groundwater Flow Groundwater elevation data obtained during the September 2023 sampling event showed that groundwater flows through and off the Site from north to south. This data also demonstrates that groundwater flow is generally consistent with local topography and flowing towards the pond located across NC 42 and to the southeast, south, and southwest. The gradient as modeled based on groundwater elevation measurements obtained on September 18, 2023 is depicted on Figure 4. Report for Groundwater Monitoring Grocery Bag Clayton, North Carolina East Coast Environmental, P.A. 3815 Junction Blvd. Raleigh, North Carolina 27603 (919) 772-0268 Fax: (919) 772-0468 15 2.0 CONCLUSIONS AND RECOMMENDATIONS The results of the analytical data for the September 2023 groundwater sampling event show the continued presence of targeted compounds at levels exceeding their respective Maximum Allowable Concentrations in select wells located on the Site. These compounds included: • Benzene was present in samples from wells MW-1, MW-2, and MW-5 at concentrations of 2,870, 927 and 113 µg/L respectively; • Isopropyl-ether was shown in well MW-1 at a level of 98.7 µg/L; • Naphthalene was found in samples from wells MW-1, MW-2, MW-5, and MW-9 at levels of 154, 13.5, 107 and 27.7 µg/L, respectively; • Tert-amyl Alcohol was found in samples from wells MW-1 and MW-5 at levels of 809 and 236 µg/L, respectively. The estimated area encompassed by the extent of 2L Standard violations in the surficial aquifer based on the September 2023 groundwater data measured as much as 56,600 square feet, or 1.3 acres. Figures 2 and 3 depict the approximate lateral extent of 2L Standard violations on and in the vicinity of the Site based on the September 2023 sampling event. Contaminant concentrations detected in the wells related to the release at the site are generally are lower than those from the 2015 and 2016 sampling events. Three time vs. historical analytical data charts have been prepared for groundwater monitoring wells MW-1, MW-2, and MW-5. Except for the chart for MW-5, the charts for MW-1 and MW-2 indicate that overall contaminant concentrations for the September 2023 monitoring event have increased when compared to historical groundwater monitoring events completed during 2015, 2016 and 2022. The data charts are included in the back of Section B. Groundwater elevation data obtained during the June 2016, March 2022 and September 2023 sampling events show that groundwater flows through and off the Site from north to south, with a slight easterly component. This data also demonstrates that groundwater flow is generally consistent with local topography. Recommendations Based on the results of the September 2023 sampling event ECE recommends that monitoring continue to take place on an annual basis. ECE also recommends replacing monitoring wells MW-4, MW-7 and MW-8 if the NC-DEQ considers the incident to be high enough risk. Report for Groundwater Monitoring Grocery Bag Clayton, North Carolina East Coast Environmental, P.A. 3815 Junction Blvd. Raleigh, North Carolina 27603 (919) 772-0268 Fax: (919) 772-0468 16 The next groundwater sampling event should be scheduled for September 2024. ECE appreciates the opportunity to be of assistance with this project. ECE recommends that a copy of this monitoring report be submitted to the North Carolina Department of Environment and Natural Resources, Division of Water Quality, Fayetteville Regional Office to the attention of Mr. Ken Currie. Report for Groundwater Monitoring Grocery Bag Clayton, North Carolina East Coast Environmental, P.A. 3815 Junction Blvd. Raleigh, North Carolina 27603 (919) 772-0268 Fax: (919) 772-0468 17 Section A Figures East Coast Environmental, P.A. 3815 Junction Boulevard Raleigh, North Carolina 27603 (919) 772-0268 Fax: (919) 772-0468 Figure 1 Site Location Map Grocery Bag 4879-A Highway 42 East Clayton, NC Scale:Prep. By:Rev. By:Date: NTS TRW TRW 3/31/2022 N Product Dispenser Grocery Bag East CoastEnvironmental, P.A.3815 Junction BoulevardRaleigh, North Carolina 27603(919) 772-0268 Scale:Prep. By:Rev. By:Date:1”=40'TRWTRW10/12/2023Figure 2 N 0' 100'Figure 2Benzene Groundwater Contaminant MapGrocery Bag 4879-A NC 42 Clayton, North CarolinaProduct Dispenser Locations Pond Sample Location MW-4 MW-1 1 ug/lMW-3 MW-2 MW-5 Buf f al oe RoadUST Locations MW-7 NT NT NT 113 ug/l 2,870 ug/l MW-8 MW-9 N C 4 2 NT NT ND 927 ug/l ND MW-6 1 ug/l MW-10 East CoastEnvironmental, P.A.3815 Junction BoulevardRaleigh, North Carolina 27603(919) 772-0268 Scale:Prep. By:Rev. By:Date:1”=40'TRWTRW10/13023Figure 3 N 0' 100'Figure 3Naphthalene Groundwater Contaminant MapGrocery Bag 4879-A NC 42 Clayton, North CarolinaProduct Dispenser Locations MW-10 MW-4 MW-1 MW-6 MW-3 MW-2 MW-5 Buf f al oe RoadUST Locations MW-7 NT 6 ug/lNT 107 ug/l 154 ug/l MW-8 MW-9 N C 4 2 NT NT 27.7 ug/l 13.5 ND NT6 ug/ l East CoastEnvironmental, P.A.3815 Junction BoulevardRaleigh, North Carolina 27603(919) 772-0268 Scale:Prep. By:Rev. By:Date:1”=40'TRWTRW10/13/2023Figure 5 N 0' 100'Figure 4Groundwater Hydraulic Gradient Map9-18-2023Grocery Bag NC 42 Clayton, North CarolinaProduct Dispenser Locations MW-10 MW-4 MW-1 MW-6 MW-3 MW-2 MW-5 Buf f al oe RoadUST Locations DW-1 NM NM NM 91.02 92.23 MW-8 MW-9 N C 4 2 NM NM 90.02 90.06 MW-7 Grou nd w ater Flo w 92.95 93.00 91.00 93.00 92.00 90.00 90.00 NMGroundwater FlowGr oundwa t er Fl ow92.00 91.00 Report for Groundwater Monitoring Grocery Bag Clayton, North Carolina East Coast Environmental, P.A. 3815 Junction Blvd. Raleigh, North Carolina 27603 (919) 772-0268 Fax: (919) 772-0468 18 Section B Tables and Charts Table 1 Analytical Data for Groundwater Samples - 9/18/2023 Grocery Bag NC-DEQ Incident # 29602 4879-A Highway 42 East Clayton, Johnston County, North Carolina Well ID Sample Date Sample ID BenzeneIsopropyl EtherEthylbenzeneIsopropyl BenzeneMTBE4 isopropy toluenen-Propyl BenzeneNaphthaleneToluene1,2,4 Trimethylbenzene1,3,5 Trimethylbenzene Total XylenesSec Butyl BenzeneMW-1 9/18/2023 MW-1 2,870 98.7 165 39.8J ND ND 62.1 154 ND ND ND 383 ND MW-2 9/18/2023 MW-2 927 24.9 61.6 ND ND ND ND 13.5J 305 ND ND 301 ND MW-3 NT NT NT NT NT NT NT NT NT NT NT NT NT MW-4 NT NT NT NT NT NT NT NT NT NT NT NT NT MW-5 9/18/2023 MW-5 113 ND 24.5 22.1 5.2 ND 33.2 107 2.92J ND ND 9.42 2.62J MW-6 NT NT NT NT NT NT NT NT NT NT NT NT NT MW-7 NT NT NT NT NT NT NT NT NT NT NT NT NT MW-8 NT NT NT NT NT NT NT NT NT NT NT NT NT MW-9 9/18/2023 MW-9 ND ND ND 5.59J ND ND 4.66J 27.7 0.94 ND ND 1.9 ND MW-10 9/18/2023 MW-10 ND ND ND ND ND ND ND ND ND ND ND ND 1.6 DW-1 NT NT NT NT NT NT NT NT NT NT NT NT NT Pond NT NT NT NT NT NT NT NT NT NT NT NT NT 1 70 600 70 20 25 70 6 600 400 400 500 70 5,000 70,000 84,500 25,000 20,000 11,700 30,000 6,000 260,000 28,500 24,100 85,500 8800 2L Standard (ug/l) SM6200B Compound NameAnalytical Method > GCL (ug/l) BOLD Values Exceed NC 2L Standard for Compound Shown All data shown in µg/L ND = Not Detected J = Estimated Concentration D = Sample Diluted for Analysis Table 1 Analytical Data for Groundwater Samples - 9/18/2023 Grocery Bag NC-DEQ Incident # 29602 4879-A Highway 42 East Clayton, Johnston County, North Carolina Well ID Sample Date Sample ID Tert-Amyl Alcohol Tert Butyl Alcohol Tert Butyl Ethyl EtherTert Amyl Methyl EtherMW-1 9/18/2023 MW-1 809J ND ND ND MW-2 9/18/2023 MW-2 ND ND ND ND MW-3 NT NT NT NT MW-4 NT NT ND ND MW-5 9/18/2023 MW-5 236 328 ND ND MW-6 NT NT NT NT MW-7 NT NT NT NT MW-8 NT NT NT NT MW-9 9/18/2023 MW-9 ND ND ND ND MW-10 9/18/2023 MW-10 ND ND ND ND DW-1 NT NT NT NT Pond 3/14/2022 Pond ND ND ND 40 NRS NRS 40,000 NRS NRS Analytical Method >SM6200B Compound Name D = Sample Diluted for Analysis BOLD Values Exceed NC 2L Standard for Compound Shown 2L Standard (ug/l) GCL (ug/l) All data shown in µg/L ND = Not Detected J = Estimated Concentration Table 2 Historical Analytical Data for Groundwater Samples Grocery Bag NC-DEQ Incident # 29602 4879-A Highway 42 East Clayton, Johnston County, North Carolina EPA 504.1 EPA- 3030C Well ID Sample Date Sample ID 1,2-DibromoethaneBenzene1,2-DichloroethaneEthylbenzeneIsopropyl BenzeneMTBE4-isopropyltolueneN-Butylbenzenen-Propyl BenzeneNaphthaleneToluene1,3,5-Trimethylbenzene1,2,4-TrimethylbenzeneTotal XylenesChloroformTotal LeadC5-C8 AliphaticsC9-C12 AliphaticsC9-C10 Aromatics3/18/2015 MW-1 ND 99 ND 84 16 46 ND ND 35 200 5.8 2.5 22 41 ND ND 270 1,260 ND 6/13/2016 NT 62 ND 47 7.5 30 ND ND ND 99 11 2.2 15 ND ND ND NT NT NT 3/14/2022 NT 890 ND 43 44 11 ND ND 64 170 15 16 1.8 31 ND NT NT NT NT 9/18/2023 NT 2870 ND 165 39.8J ND ND ND 62.1 154 ND ND ND 383 ND NT NT NT NT 3/18/2015 ND 0.83 ND 1.4 0.7 5 ND ND 0.65 6 0.56 1.8 10 12 ND ND 30.3 46.4 11 6/13/2016 NT ND ND ND ND 4.9 ND ND ND ND ND 0.56 2.6 ND ND ND NT NT NT 3/14/2022 ND 45 ND 16 1.3 1.5 ND ND 1.2 1.3 1.2 2.3 3.9 33 ND NT NT NT NT 9/18/2023 ND 927 ND 61.6 ND ND ND ND ND 13.5J 305 ND ND 301 ND NT NT NT NT 3/18/2015 ND 160 ND 51 4.3 18 ND ND 2.6 14 2.9 9.8 52 420 ND ND 359 751 56 6/13/2016 NT 83 ND 31 ND 14 ND ND 2.4 16 ND 4.8 19 70 ND ND NT NT NT 3/14/2022 NT 45 ND 3 0.68 7.8 ND ND ND 20 ND 0.62 1.9 3.2 ND NT NT NT NT 9/18/2023 NT NT NT NT NT NT NT NT NT NT NT NT NT NT NT NT NT NT NT 3/18/2015 ND 17 ND ND ND 7.6 ND ND ND 2.6 ND 4.8 22 300 ND ND 340 470 30 6/13/2015 NT 11 ND 1.7 1.1 7.2 ND ND ND 5.8 0.65 ND ND 18 ND ND NT NT NT 3/14/2022 NT 1.8 ND ND 1.1 ND ND ND ND 11 ND ND ND 1.4 ND NT NT NT NT 9/18/2023 NT NT NT NT NT NT NT NT NT NT NT NT NT NT NT NT NT NT NT 3/18/2015 ND 1,200 ND ND 130 43 ND ND 290 360 1,500 540 2,400 6,700 ND ND 5,400 19,400 3,600 6/13/2016 NT 520 ND 380 30 19 ND ND 75 150 49 72 320 410 ND ND NT NT NT 3/14/2022 NT 200 ND 68 42 7.7 2.5 ND 78 150 14 6 26 67 ND NT NT NT NT 9/18/2023 NT 113 ND 24.5 22.1 5.2 ND ND 33.2 107 2.92J ND ND 9.42 ND NT NT NT NT MW-2 MW-2 MW-4 MW-5 MW-3MW-3 MW-4 MW-5 MADEP-VPH Compound Name Analytical Method > MW-1 Table 2 Historical Analytical Data for Groundwater Samples Grocery Bag NC-DEQ Incident # 29602 4879-A Highway 42 East Clayton, Johnston County, North Carolina Well ID Sample Date Sample ID 1,2-DibromoethaneBenzene1,2-DichloroethaneEthylbenzeneIsopropyl BenzeneMTBE4-isopropyltolueneN-Butylbenzenen-Propyl BenzeneNaphthaleneToluene1,3,5-Trimethylbenzene1,2,4-TrimethylbenzeneTotal XylenesChloroformTotal LeadC5-C8 AliphaticsC9-C12 AliphaticsC9-C10 Aromatics5/17/2015 ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND 6/13/2016 NT ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND NT NT NT 3/14/2022 NT NT NT NT NT NT NT NT NT NT NT NT NT NT NT NT NT NT NT 9/18/2023 NT NT NT NT NT NT NT NT NT NT NT NT NT NT NT NT NT NT NT 5/17/2015 ND 680 ND 1,700 140 84 ND ND 440 830 1,400 1,300 4,500 12,000 ND ND 4,490 18,900 14,000 6/13/2016 NT 1,500 ND 1,500 86 120 ND ND 360 660 1,000 800 3,100 9,200 ND ND NT NT NT 3/14/2022 NT 360 ND 1,300 87 22 ND ND 260 780 350 380 1,600 4,200 ND NT NT NT NT 9/18/2023 NT NT NT NT NT NT NT NT NT NT NT NT NT NT NT NT NT NT NT 9/9/2015 ND 3,200 ND 540 49 930 ND ND 110 450 59 130 480 620 ND ND 176 201 530 6/13/2016 NT 3,600 ND 480 38 ND ND ND 140 380 54 94 410 470 ND ND NT NT NT 3/14/2022 NT NT NT NT NT NT NT NT NT NT NT NT NT NT NT NT NT NT NT 9/18/2023 NT NT NT NT NT NT NT NT NT NT NT NT NT NT NT NT NT NT NT 9/9/2015 ND 8.5 ND 2 20 16 ND ND 33 120 2.7 3.6 ND 16 ND ND 6,040 2,070 2,200 6/13/2016 ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND NT 3/14/2022 NT ND ND 0.73 8.2 4.3 ND ND 10 60 0.94 ND ND 1.9 ND NT NT NT NT 9/18/2023 NT ND ND ND 5.59J ND ND ND 4.66J 27.7 ND ND ND ND ND NT NT NT NT 9/9/2015 ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND 5.6 6/13/2016 NT ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND NT NT NT 3/14/2022 NT ND ND ND ND ND ND ND ND ND ND ND ND ND ND NT NT NT NT 9/18/2023 NT ND ND ND ND ND ND ND ND ND ND ND ND ND ND NT NT NT NT 10/29/2015 ND ND ND ND ND ND ND ND ND ND ND ND 0.43 ND ND ND ND ND ND 6/13/2016 ND 1.8 ND ND 0.49 0.59 ND ND ND 2.4 ND ND 1.1 0.47 ND ND NT NT NT 3/14/2022 NT NT NT NT NT NT NT NT NT NT NT NT NT NT NT NT NT NT NT MW-10 MW-7 MW-9 MW-7 MW-6 MW-8 DW-1 DW-1 MW-9 MW-6 MW-8 MW-10 Table 2 Historical Analytical Data for Groundwater Samples Grocery Bag NC-DEQ Incident # 29602 4879-A Highway 42 East Clayton, Johnston County, North Carolina Well ID Sample Date Sample ID 1,2-DibromoethaneBenzene1,2-DichloroethaneEthylbenzeneIsopropyl BenzeneMTBE4-isopropyltolueneN-Butylbenzenen-Propyl BenzeneNaphthaleneToluene1,3,5-Trimethylbenzene1,2,4-TrimethylbenzeneTotal XylenesChloroformTotal LeadC5-C8 AliphaticsC9-C12 AliphaticsC9-C10 Aromatics10/29/2015 NT ND ND ND ND ND ND ND ND ND ND ND ND ND ND NT NT NT NT 6/13/2016 ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND 3/14/2022 NT ND ND ND ND ND ND ND ND ND ND ND ND ND 0.93 J NT NT NT NT 0.02 1 0.4 600 70 20 25 70 70 6 600 400 400 500 70 15 400 700 200 50 5,000 400 84,500 25,000 20,000 11,700 6,900 30,000 6,000 260,000 25,000 28,500 85,500 70000 15000 NRS NRS NRS NRS Denotes "No Regulatory Standard Established Shaded Values Exceed NCGross Contaminant Concentration for Compound Shown D = Sample Diluted for Analysis NT = Not Tested J = Estimated Concentration BOLD Values Exceed NC 2L Standard for Compound Shown All data shown in µg/L ND = Not Detected 2L Standard (ug/l) Pond GCL (ug/l) Pond Table 3 Groundwater Elevations - September 18, 2023 Grocery Bag NC-DEQ Incident # 29602 4879-A Highway 42 East Clayton, Johnston County, North Carolina Well ID Date Installed Well Casing Depth (ft) Screened Interval (ft) Well Depth (ft) Top of Casing Elevation(ft)Depth to Water (ft)Groundwater Elevation (ft) MW-1 11/2/2009 0-3 3 - 10 -10 94.28 2.05 92.23 MW-2 3/17/2015 0-5 5 - 15 -15 95.08 2.2 92.95 MW-3 3/17/2015 0-5 5 - 15 -15 92.68 92.68 MW-4 3/18/2015 0-5 5 - 15 -15 93.42 93.42 MW-5 3/18/2015 0-5 5 - 15 -15 94.82 3.8 91.02 MW-6 5/17/2015 0-5 5 - 15 -15 93.16 93.16 MW-7 5/17/2015 0-3 3 - 13 -13 94.48 94.48 MW-8 9/2/2015 0-5 5 - 15 -15 94.13 94.13 MW-9 9/2/2015 0-3 3 - 13 -13 92.8 2.78 90.02 MW-10 9/2/2015 0-3 3 - 13 -13 92.46 2.4 90.06 DW-1 10/22/2015 0-30 3 0- 40 -40 94.46 94.46 276 150 990 3,414 0 500 1,000 1,500 2,000 2,500 3,000 3,500 4,000 3/18/2015 6/13/2016 3/14/2022 9/18/2023Concentration (ug/l)Sample Date Grocery Bag Total BTEX + MTBE Concentrations MW-1 652 198 85 1594 0 200 400 600 800 1,000 1,200 1,400 1,600 1,800 3/18/2015 6/13/2016 3/14/2022 9/18/2023Concentration (ug/l)Sample Date Grocery Bag Total BTEX + MTBE Concentrations MW-2 10,543 1378 357 154 0 2,000 4,000 6,000 8,000 10,000 12,000 3/18/2015 6/13/2016 3/14/2022 9/18/2023Concentration (ug/l)Sample Date Grocery Bag Total BTEX + MTBE Concentrations MW-5 Report for Groundwater Monitoring Grocery Bag Clayton, North Carolina East Coast Environmental, P.A. 3815 Junction Blvd. Raleigh, North Carolina 27603 (919) 772-0268 Fax: (919) 772-0468 19 Section C Analytical Data September 2023 Groundwater Sampling Event ANALYTICAL REPORT PREPARED FOR Attn: Tom Will East Coast Environmental 3815 Junction Blvd Raleigh, North Carolina 27603 Generated 10/6/2023 9:30:09 AM JOB DESCRIPTION Grocery Bag JOB NUMBER 752-11689-1 See page two for job notes and contact information. Cary NC 27511 102-A Woodwinds Industrial Court Eurofins Raleigh Page 1 of 31 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 Eurofins Raleigh Eurofins Savannah is a laboratory within Eurofins Environment Testing Southeast, LLC, a company within Eurofins Environment Testing Group of Companies Job Notes This report may not be reproduced except in full, and with written approval from the laboratory. The results relate only to the samples tested. For questions please contact the Project Manager at the e-mail address or telephone number listed on this page. The test results in this report relate only to the samples as received by the laboratory and will meet all requirements of the methodology, with any exceptions noted. This report shall not be reproduced except in full, without the express written approval of the laboratory. All questions should be directed to the Eurofins Environment Testing Southeast, LLC Project Manager. Authorization Generated 10/6/2023 9:30:09 AM Authorized for release by John Andros, Project Manager I John.Andros@et.eurofinsus.com (404)944-4744 Page 2 of 31 10/6/2023 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 Table of Contents Client: East Coast Environmental Project/Site: Grocery Bag Laboratory Job ID: 752-11689-1 Page 3 of 31 Eurofins Raleigh10/6/2023 Cover Page . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1 Table of Contents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3 Definitions/Glossary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4 Case Narrative . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5 Detection Summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6 Client Sample Results . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7 Surrogate Summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .17 QC Sample Results . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .18 QC Association Summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .25 Lab Chronicle . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .26 Certification Summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .27 Method Summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .28 Sample Summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .29 Chain of Custody . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .30 Receipt Checklists . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .31 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 Definitions/Glossary Job ID: 752-11689-1Client: East Coast Environmental Project/Site: Grocery Bag Qualifiers GC/MS VOA Qualifier Description J Result is less than the RL but greater than or equal to the MDL and the concentration is an approximate value. Qualifier Glossary These commonly used abbreviations may or may not be present in this report. ¤Listed under the "D" column to designate that the result is reported on a dry weight basis Abbreviation %R Percent Recovery CFL Contains Free Liquid CFU Colony Forming Unit CNF Contains No Free Liquid DER Duplicate Error Ratio (normalized absolute difference) Dil Fac Dilution Factor DL Detection Limit (DoD/DOE) DL, RA, RE, IN Indicates a Dilution, Re-analysis, Re-extraction, or additional Initial metals/anion analysis of the sample DLC Decision Level Concentration (Radiochemistry) EDL Estimated Detection Limit (Dioxin) LOD Limit of Detection (DoD/DOE) LOQ Limit of Quantitation (DoD/DOE) MCL EPA recommended "Maximum Contaminant Level" MDA Minimum Detectable Activity (Radiochemistry) MDC Minimum Detectable Concentration (Radiochemistry) MDL Method Detection Limit ML Minimum Level (Dioxin) MPN Most Probable Number MQL Method Quantitation Limit NC Not Calculated ND Not Detected at the reporting limit (or MDL or EDL if shown) NEG Negative / Absent POS Positive / Present PQL Practical Quantitation Limit PRES Presumptive QC Quality Control RER Relative Error Ratio (Radiochemistry) RL Reporting Limit or Requested Limit (Radiochemistry) RPD Relative Percent Difference, a measure of the relative difference between two points TEF Toxicity Equivalent Factor (Dioxin) TEQ Toxicity Equivalent Quotient (Dioxin) TNTC Too Numerous To Count Eurofins Raleigh Page 4 of 31 10/6/2023 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 Case Narrative Client: East Coast Environmental Job ID: 752-11689-1 Project/Site: Grocery Bag Job ID: 752-11689-1 Laboratory: Eurofins Raleigh Narrative Job Narrative 752-11689-1 Receipt The samples were received on 9/19/2023 1:20 PM. Unless otherwise noted below, the samples arrived in good condition, and, where required, properly preserved and on ice. The temperature of the cooler at receipt time was 1.8°C GC/MS VOA No additional analytical or quality issues were noted, other than those described above or in the Definitions/ Glossary page. Eurofins RaleighPage 5 of 31 10/6/2023 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 Detection Summary Job ID: 752-11689-1Client: East Coast Environmental Project/Site: Grocery Bag Client Sample ID: MW-1 Lab Sample ID: 752-11689-1 Isopropyl ether RL 50.0 ug/L MDL 10.5 Analyte Result Qualifier Unit Dil Fac D Method Prep Type Total/NA5098.7 SM6200-B Benzene 50.0 ug/L2.50 Total/NA502870SM6200-B Ethylbenzene 50.0 ug/L5.00 Total/NA50165SM6200-B m,p-Xylenes 100 ug/L9.00 Total/NA50300SM6200-B o-Xylene 50.0 ug/L4.40 Total/NA5083.0 SM6200-B N-Propylbenzene 50.0 ug/L3.65 Total/NA5062.1 SM6200-B Isopropylbenzene 50.0 ug/L6.50 Total/NA5039.8 J SM6200-B Xylenes, Total 50.0 ug/L11.0 Total/NA50383SM6200-B Naphthalene 50.0 ug/L4.30 Total/NA50154SM6200-B tert-Amyl alcohol 1000 ug/L125 Total/NA50809JSM6200-B Client Sample ID: MW-2 Lab Sample ID: 752-11689-2 Isopropyl ether RL 20.0 ug/L MDL 4.20 Analyte Result Qualifier Unit Dil Fac D Method Prep Type Total/NA2024.9 SM6200-B Benzene 20.0 ug/L1.00 Total/NA20927SM6200-B Toluene 20.0 ug/L1.06 Total/NA20305SM6200-B Ethylbenzene 20.0 ug/L2.00 Total/NA2061.6 SM6200-B m,p-Xylenes 40.0 ug/L3.60 Total/NA20181SM6200-B o-Xylene 20.0 ug/L1.76 Total/NA20120SM6200-B Xylenes, Total 20.0 ug/L4.40 Total/NA20301SM6200-B Naphthalene 20.0 ug/L1.72 Total/NA2013.5 J SM6200-B Client Sample ID: MW-5 Lab Sample ID: 752-11689-3 Methyl tert-butyl ether RL 5.00 ug/L MDL 0.600 Analyte Result Qualifier Unit Dil Fac D Method Prep Type Total/NA55.20 SM6200-B Benzene 5.00 ug/L0.250 Total/NA5113SM6200-B Toluene 5.00 ug/L0.265 Total/NA52.92 J SM6200-B Ethylbenzene 5.00 ug/L0.500 Total/NA524.5 SM6200-B m,p-Xylenes 10.0 ug/L0.900 Total/NA59.42 J SM6200-B N-Propylbenzene 5.00 ug/L0.365 Total/NA533.2 SM6200-B sec-Butylbenzene 5.00 ug/L0.265 Total/NA52.62 J SM6200-B Isopropylbenzene 5.00 ug/L0.650 Total/NA522.1 SM6200-B Xylenes, Total 5.00 ug/L1.10 Total/NA59.42 SM6200-B Naphthalene 5.00 ug/L0.430 Total/NA5107SM6200-B tert-Amyl alcohol 100 ug/L12.5 Total/NA5236SM6200-B tert-Butyl alcohol 100 ug/L17.0 Total/NA5328SM6200-B Client Sample ID: MW-9 Lab Sample ID: 752-11689-4 N-Propylbenzene RL 10.0 ug/L MDL 0.730 Analyte Result Qualifier Unit Dil Fac D Method Prep Type Total/NA10J4.66 SM6200-B Isopropylbenzene 10.0 ug/L1.30 Total/NA105.59 J SM6200-B Naphthalene 10.0 ug/L0.860 Total/NA1027.7 SM6200-B tert-Amyl alcohol 200 ug/L25.0 Total/NA1096.9 J SM6200-B Client Sample ID: MW-10 Lab Sample ID: 752-11689-5 No Detections. Eurofins Raleigh This Detection Summary does not include radiochemical test results. Page 6 of 31 10/6/2023 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 Client Sample Results Job ID: 752-11689-1Client: East Coast Environmental Project/Site: Grocery Bag Lab Sample ID: 752-11689-1Client Sample ID: MW-1 Matrix: WaterDate Collected: 09/18/23 15:00 Date Received: 09/19/23 13:20 Method: SM6200-B - Volatile Organic Compounds RL MDL ND 50.0 4.55 ug/L 10/02/23 19:50 50 Analyte Dil FacAnalyzedPreparedUnitDResultQualifier Dichlorodifluoromethane 50.0 2.50 ug/L 10/02/23 19:50 50NDChloromethane 50.0 4.15 ug/L 10/02/23 19:50 50NDVinyl chloride 50.0 14.0 ug/L 10/02/23 19:50 50NDBromomethane 50.0 9.00 ug/L 10/02/23 19:50 50NDChloroethane 50.0 7.50 ug/L 10/02/23 19:50 50NDTrichlorofluoromethane 50.0 7.50 ug/L 10/02/23 19:50 50ND1,1-Dichloroethene 100 3.50 ug/L 10/02/23 19:50 50NDMethylene Chloride 50.0 6.00 ug/L 10/02/23 19:50 50NDMethyl tert-butyl ether 50.0 5.50 ug/L 10/02/23 19:50 50NDtrans-1,2-Dichloroethene 50.0 2.50 ug/L 10/02/23 19:50 50ND1,1-Dichloroethane 50.0 10.5 ug/L 10/02/23 19:50 5098.7Isopropyl ether 50.0 3.75 ug/L 10/02/23 19:50 50NDcis-1,2-Dichloroethene 50.0 6.00 ug/L 10/02/23 19:50 50ND2,2-Dichloropropane 50.0 5.50 ug/L 10/02/23 19:50 50NDBromochloromethane 50.0 4.15 ug/L 10/02/23 19:50 50NDChloroform 50.0 7.50 ug/L 10/02/23 19:50 50ND1,1,1-Trichloroethane 50.0 3.15 ug/L 10/02/23 19:50 50ND1,1-Dichloropropene 50.0 4.10 ug/L 10/02/23 19:50 50NDCarbon tetrachloride 50.0 4.10 ug/L 10/02/23 19:50 50ND1,2-Dichloroethane 50.0 2.50 ug/L 10/02/23 19:50 502870Benzene 50.0 6.50 ug/L 10/02/23 19:50 50NDTrichloroethene 50.0 4.90 ug/L 10/02/23 19:50 50ND1,2-Dichloropropane 50.0 6.50 ug/L 10/02/23 19:50 50NDDibromomethane 50.0 5.00 ug/L 10/02/23 19:50 50NDBromodichloromethane 50.0 3.65 ug/L 10/02/23 19:50 50NDcis-1,3-Dichloropropene 50.0 2.65 ug/L 10/02/23 19:50 50NDToluene 50.0 4.00 ug/L 10/02/23 19:50 50NDtrans-1,3-Dichloropropene 50.0 3.40 ug/L 10/02/23 19:50 50ND1,1,2-Trichloroethane 50.0 7.50 ug/L 10/02/23 19:50 50ND1,3-Dichloropropane 50.0 4.95 ug/L 10/02/23 19:50 50NDTetrachloroethene 50.0 3.35 ug/L 10/02/23 19:50 50NDDibromochloromethane 50.0 21.0 ug/L 10/02/23 19:50 50ND1,2-Dibromoethane 50.0 3.45 ug/L 10/02/23 19:50 50NDChlorobenzene 50.0 4.55 ug/L 10/02/23 19:50 50ND1,1,1,2-Tetrachloroethane 5000 1300 ug/L 10/02/23 19:50 50NDEthanol 50.0 5.00 ug/L 10/02/23 19:50 50165Ethylbenzene 50.0 17.5 ug/L 10/02/23 19:50 50NDFreon 113 100 9.00 ug/L 10/02/23 19:50 50300m,p-Xylenes 50.0 4.40 ug/L 10/02/23 19:50 5083.0o-Xylene 50.0 4.10 ug/L 10/02/23 19:50 50NDStyrene 50.0 10.0 ug/L 10/02/23 19:50 50NDBromoform 50.0 3.30 ug/L 10/02/23 19:50 50ND4-Isopropyltoluene 50.0 4.25 ug/L 10/02/23 19:50 50ND1,1,2,2-Tetrachloroethane 50.0 6.50 ug/L 10/02/23 19:50 50NDBromobenzene 50.0 7.50 ug/L 10/02/23 19:50 50ND1,2,3-Trichloropropane 50.0 3.65 ug/L 10/02/23 19:50 5062.1N-Propylbenzene 50.0 5.00 ug/L 10/02/23 19:50 50ND2-Chlorotoluene 50.0 5.00 ug/L 10/02/23 19:50 50ND1,3,5-Trimethylbenzene Eurofins Raleigh Page 7 of 31 10/6/2023 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 Client Sample Results Job ID: 752-11689-1Client: East Coast Environmental Project/Site: Grocery Bag Lab Sample ID: 752-11689-1Client Sample ID: MW-1 Matrix: WaterDate Collected: 09/18/23 15:00 Date Received: 09/19/23 13:20 Method: SM6200-B - Volatile Organic Compounds (Continued) RL MDL ND 50.0 5.00 ug/L 10/02/23 19:50 50 Analyte Dil FacAnalyzedPreparedUnitDResultQualifier 4-Chlorotoluene 50.0 4.70 ug/L 10/02/23 19:50 50NDtert-Butylbenzene 50.0 3.35 ug/L 10/02/23 19:50 50ND1,2,4-Trimethylbenzene 50.0 2.65 ug/L 10/02/23 19:50 50NDsec-Butylbenzene 50.0 4.60 ug/L 10/02/23 19:50 50ND1,3-Dichlorobenzene 50.0 6.50 ug/L 10/02/23 19:50 5039.8 JIsopropylbenzene 50.0 5.00 ug/L 10/02/23 19:50 50ND1,4-Dichlorobenzene 50.0 3.70 ug/L 10/02/23 19:50 50NDn-Butylbenzene 50.0 2.60 ug/L 10/02/23 19:50 50ND1,2-Dichlorobenzene 50.0 24.0 ug/L 10/02/23 19:50 50ND1,2-Dibromo-3-Chloropropane 50.0 4.85 ug/L 10/02/23 19:50 50ND1,2,4-Trichlorobenzene 50.0 7.50 ug/L 10/02/23 19:50 50NDHexachlorobutadiene 50.0 11.0 ug/L 10/02/23 19:50 50383Xylenes, Total 50.0 12.5 ug/L 10/02/23 19:50 50ND1,2,3-Trichlorobenzene 50.0 4.30 ug/L 10/02/23 19:50 50154Naphthalene 250 16.0 ug/L 10/02/23 19:50 50NDtert-Butyl Formate 50.0 18.5 ug/L 10/02/23 19:50 50NDTert-butyl ethyl ether 500 10.5 ug/L 10/02/23 19:50 50NDTert-amyl methyl ether 1000 125 ug/L 10/02/23 19:50 50809Jtert-Amyl alcohol 1000 170 ug/L 10/02/23 19:50 50NDtert-Butyl alcohol Toluene-d8 (Surr)102 70-130 10/02/23 19:50 50 Surrogate Dil FacAnalyzedPreparedQualifierLimits%Recovery 4-Bromofluorobenzene (Surr)103 10/02/23 19:50 5070-130 Dibromofluoromethane (Surr)98 10/02/23 19:50 5070-130 Eurofins Raleigh Page 8 of 31 10/6/2023 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 Client Sample Results Job ID: 752-11689-1Client: East Coast Environmental Project/Site: Grocery Bag Lab Sample ID: 752-11689-2Client Sample ID: MW-2 Matrix: WaterDate Collected: 09/18/23 15:15 Date Received: 09/19/23 13:20 Method: SM6200-B - Volatile Organic Compounds RL MDL ND 20.0 1.82 ug/L 10/02/23 20:20 20 Analyte Dil FacAnalyzedPreparedUnitDResultQualifier Dichlorodifluoromethane 20.0 1.00 ug/L 10/02/23 20:20 20NDChloromethane 20.0 1.66 ug/L 10/02/23 20:20 20NDVinyl chloride 20.0 5.60 ug/L 10/02/23 20:20 20NDBromomethane 20.0 3.60 ug/L 10/02/23 20:20 20NDChloroethane 20.0 3.00 ug/L 10/02/23 20:20 20NDTrichlorofluoromethane 20.0 3.00 ug/L 10/02/23 20:20 20ND1,1-Dichloroethene 40.0 1.40 ug/L 10/02/23 20:20 20NDMethylene Chloride 20.0 2.40 ug/L 10/02/23 20:20 20NDMethyl tert-butyl ether 20.0 2.20 ug/L 10/02/23 20:20 20NDtrans-1,2-Dichloroethene 20.0 1.00 ug/L 10/02/23 20:20 20ND1,1-Dichloroethane 20.0 4.20 ug/L 10/02/23 20:20 2024.9Isopropyl ether 20.0 1.50 ug/L 10/02/23 20:20 20NDcis-1,2-Dichloroethene 20.0 2.40 ug/L 10/02/23 20:20 20ND2,2-Dichloropropane 20.0 2.20 ug/L 10/02/23 20:20 20NDBromochloromethane 20.0 1.66 ug/L 10/02/23 20:20 20NDChloroform 20.0 3.00 ug/L 10/02/23 20:20 20ND1,1,1-Trichloroethane 20.0 1.26 ug/L 10/02/23 20:20 20ND1,1-Dichloropropene 20.0 1.64 ug/L 10/02/23 20:20 20NDCarbon tetrachloride 20.0 1.64 ug/L 10/02/23 20:20 20ND1,2-Dichloroethane 20.0 1.00 ug/L 10/02/23 20:20 20927Benzene 20.0 2.60 ug/L 10/02/23 20:20 20NDTrichloroethene 20.0 1.96 ug/L 10/02/23 20:20 20ND1,2-Dichloropropane 20.0 2.60 ug/L 10/02/23 20:20 20NDDibromomethane 20.0 2.00 ug/L 10/02/23 20:20 20NDBromodichloromethane 20.0 1.46 ug/L 10/02/23 20:20 20NDcis-1,3-Dichloropropene 20.0 1.06 ug/L 10/02/23 20:20 20305Toluene 20.0 1.60 ug/L 10/02/23 20:20 20NDtrans-1,3-Dichloropropene 20.0 1.36 ug/L 10/02/23 20:20 20ND1,1,2-Trichloroethane 20.0 3.00 ug/L 10/02/23 20:20 20ND1,3-Dichloropropane 20.0 1.98 ug/L 10/02/23 20:20 20NDTetrachloroethene 20.0 1.34 ug/L 10/02/23 20:20 20NDDibromochloromethane 20.0 8.40 ug/L 10/02/23 20:20 20ND1,2-Dibromoethane 20.0 1.38 ug/L 10/02/23 20:20 20NDChlorobenzene 20.0 1.82 ug/L 10/02/23 20:20 20ND1,1,1,2-Tetrachloroethane 2000 520 ug/L 10/02/23 20:20 20NDEthanol 20.0 2.00 ug/L 10/02/23 20:20 2061.6Ethylbenzene 20.0 7.00 ug/L 10/02/23 20:20 20NDFreon 113 40.0 3.60 ug/L 10/02/23 20:20 20181m,p-Xylenes 20.0 1.76 ug/L 10/02/23 20:20 20120o-Xylene 20.0 1.64 ug/L 10/02/23 20:20 20NDStyrene 20.0 4.00 ug/L 10/02/23 20:20 20NDBromoform 20.0 1.32 ug/L 10/02/23 20:20 20ND4-Isopropyltoluene 20.0 1.70 ug/L 10/02/23 20:20 20ND1,1,2,2-Tetrachloroethane 20.0 2.60 ug/L 10/02/23 20:20 20NDBromobenzene 20.0 3.00 ug/L 10/02/23 20:20 20ND1,2,3-Trichloropropane 20.0 1.46 ug/L 10/02/23 20:20 20NDN-Propylbenzene 20.0 2.00 ug/L 10/02/23 20:20 20ND2-Chlorotoluene 20.0 2.00 ug/L 10/02/23 20:20 20ND1,3,5-Trimethylbenzene Eurofins Raleigh Page 9 of 31 10/6/2023 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 Client Sample Results Job ID: 752-11689-1Client: East Coast Environmental Project/Site: Grocery Bag Lab Sample ID: 752-11689-2Client Sample ID: MW-2 Matrix: WaterDate Collected: 09/18/23 15:15 Date Received: 09/19/23 13:20 Method: SM6200-B - Volatile Organic Compounds (Continued) RL MDL ND 20.0 2.00 ug/L 10/02/23 20:20 20 Analyte Dil FacAnalyzedPreparedUnitDResultQualifier 4-Chlorotoluene 20.0 1.88 ug/L 10/02/23 20:20 20NDtert-Butylbenzene 20.0 1.34 ug/L 10/02/23 20:20 20ND1,2,4-Trimethylbenzene 20.0 1.06 ug/L 10/02/23 20:20 20NDsec-Butylbenzene 20.0 1.84 ug/L 10/02/23 20:20 20ND1,3-Dichlorobenzene 20.0 2.60 ug/L 10/02/23 20:20 20NDIsopropylbenzene 20.0 2.00 ug/L 10/02/23 20:20 20ND1,4-Dichlorobenzene 20.0 1.48 ug/L 10/02/23 20:20 20NDn-Butylbenzene 20.0 1.04 ug/L 10/02/23 20:20 20ND1,2-Dichlorobenzene 20.0 9.60 ug/L 10/02/23 20:20 20ND1,2-Dibromo-3-Chloropropane 20.0 1.94 ug/L 10/02/23 20:20 20ND1,2,4-Trichlorobenzene 20.0 3.00 ug/L 10/02/23 20:20 20NDHexachlorobutadiene 20.0 4.40 ug/L 10/02/23 20:20 20301Xylenes, Total 20.0 5.00 ug/L 10/02/23 20:20 20ND1,2,3-Trichlorobenzene 20.0 1.72 ug/L 10/02/23 20:20 2013.5 JNaphthalene 100 6.40 ug/L 10/02/23 20:20 20NDtert-Butyl Formate 20.0 7.40 ug/L 10/02/23 20:20 20NDTert-butyl ethyl ether 200 4.20 ug/L 10/02/23 20:20 20NDTert-amyl methyl ether 400 50.0 ug/L 10/02/23 20:20 20NDtert-Amyl alcohol 400 68.0 ug/L 10/02/23 20:20 20NDtert-Butyl alcohol Toluene-d8 (Surr)96 70-130 10/02/23 20:20 20 Surrogate Dil FacAnalyzedPreparedQualifierLimits%Recovery 4-Bromofluorobenzene (Surr)104 10/02/23 20:20 2070-130 Dibromofluoromethane (Surr)99 10/02/23 20:20 2070-130 Eurofins Raleigh Page 10 of 31 10/6/2023 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 Client Sample Results Job ID: 752-11689-1Client: East Coast Environmental Project/Site: Grocery Bag Lab Sample ID: 752-11689-3Client Sample ID: MW-5 Matrix: WaterDate Collected: 09/18/23 15:30 Date Received: 09/19/23 13:20 Method: SM6200-B - Volatile Organic Compounds RL MDL ND 5.00 0.455 ug/L 10/02/23 20:49 5 Analyte Dil FacAnalyzedPreparedUnitDResultQualifier Dichlorodifluoromethane 5.00 0.250 ug/L 10/02/23 20:49 5NDChloromethane 5.00 0.415 ug/L 10/02/23 20:49 5NDVinyl chloride 5.00 1.40 ug/L 10/02/23 20:49 5NDBromomethane 5.00 0.900 ug/L 10/02/23 20:49 5NDChloroethane 5.00 0.750 ug/L 10/02/23 20:49 5NDTrichlorofluoromethane 5.00 0.750 ug/L 10/02/23 20:49 5ND1,1-Dichloroethene 10.0 0.350 ug/L 10/02/23 20:49 5NDMethylene Chloride 5.00 0.600 ug/L 10/02/23 20:49 55.20Methyl tert-butyl ether 5.00 0.550 ug/L 10/02/23 20:49 5NDtrans-1,2-Dichloroethene 5.00 0.250 ug/L 10/02/23 20:49 5ND1,1-Dichloroethane 5.00 1.05 ug/L 10/02/23 20:49 5NDIsopropyl ether 5.00 0.375 ug/L 10/02/23 20:49 5NDcis-1,2-Dichloroethene 5.00 0.600 ug/L 10/02/23 20:49 5ND2,2-Dichloropropane 5.00 0.550 ug/L 10/02/23 20:49 5NDBromochloromethane 5.00 0.415 ug/L 10/02/23 20:49 5NDChloroform 5.00 0.750 ug/L 10/02/23 20:49 5ND1,1,1-Trichloroethane 5.00 0.315 ug/L 10/02/23 20:49 5ND1,1-Dichloropropene 5.00 0.410 ug/L 10/02/23 20:49 5NDCarbon tetrachloride 5.00 0.410 ug/L 10/02/23 20:49 5ND1,2-Dichloroethane 5.00 0.250 ug/L 10/02/23 20:49 5113Benzene 5.00 0.650 ug/L 10/02/23 20:49 5NDTrichloroethene 5.00 0.490 ug/L 10/02/23 20:49 5ND1,2-Dichloropropane 5.00 0.650 ug/L 10/02/23 20:49 5NDDibromomethane 5.00 0.500 ug/L 10/02/23 20:49 5NDBromodichloromethane 5.00 0.365 ug/L 10/02/23 20:49 5NDcis-1,3-Dichloropropene 5.00 0.265 ug/L 10/02/23 20:49 52.92 JToluene 5.00 0.400 ug/L 10/02/23 20:49 5NDtrans-1,3-Dichloropropene 5.00 0.340 ug/L 10/02/23 20:49 5ND1,1,2-Trichloroethane 5.00 0.750 ug/L 10/02/23 20:49 5ND1,3-Dichloropropane 5.00 0.495 ug/L 10/02/23 20:49 5NDTetrachloroethene 5.00 0.335 ug/L 10/02/23 20:49 5NDDibromochloromethane 5.00 2.10 ug/L 10/02/23 20:49 5ND1,2-Dibromoethane 5.00 0.345 ug/L 10/02/23 20:49 5NDChlorobenzene 5.00 0.455 ug/L 10/02/23 20:49 5ND1,1,1,2-Tetrachloroethane 500 130 ug/L 10/02/23 20:49 5NDEthanol 5.00 0.500 ug/L 10/02/23 20:49 524.5Ethylbenzene 5.00 1.75 ug/L 10/02/23 20:49 5NDFreon 113 10.0 0.900 ug/L 10/02/23 20:49 59.42 Jm,p-Xylenes 5.00 0.440 ug/L 10/02/23 20:49 5NDo-Xylene 5.00 0.410 ug/L 10/02/23 20:49 5NDStyrene 5.00 1.00 ug/L 10/02/23 20:49 5NDBromoform 5.00 0.330 ug/L 10/02/23 20:49 5ND4-Isopropyltoluene 5.00 0.425 ug/L 10/02/23 20:49 5ND1,1,2,2-Tetrachloroethane 5.00 0.650 ug/L 10/02/23 20:49 5NDBromobenzene 5.00 0.750 ug/L 10/02/23 20:49 5ND1,2,3-Trichloropropane 5.00 0.365 ug/L 10/02/23 20:49 533.2N-Propylbenzene 5.00 0.500 ug/L 10/02/23 20:49 5ND2-Chlorotoluene 5.00 0.500 ug/L 10/02/23 20:49 5ND1,3,5-Trimethylbenzene Eurofins Raleigh Page 11 of 31 10/6/2023 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 Client Sample Results Job ID: 752-11689-1Client: East Coast Environmental Project/Site: Grocery Bag Lab Sample ID: 752-11689-3Client Sample ID: MW-5 Matrix: WaterDate Collected: 09/18/23 15:30 Date Received: 09/19/23 13:20 Method: SM6200-B - Volatile Organic Compounds (Continued) RL MDL ND 5.00 0.500 ug/L 10/02/23 20:49 5 Analyte Dil FacAnalyzedPreparedUnitDResultQualifier 4-Chlorotoluene 5.00 0.470 ug/L 10/02/23 20:49 5NDtert-Butylbenzene 5.00 0.335 ug/L 10/02/23 20:49 5ND1,2,4-Trimethylbenzene 5.00 0.265 ug/L 10/02/23 20:49 52.62 Jsec-Butylbenzene 5.00 0.460 ug/L 10/02/23 20:49 5ND1,3-Dichlorobenzene 5.00 0.650 ug/L 10/02/23 20:49 522.1Isopropylbenzene 5.00 0.500 ug/L 10/02/23 20:49 5ND1,4-Dichlorobenzene 5.00 0.370 ug/L 10/02/23 20:49 5NDn-Butylbenzene 5.00 0.260 ug/L 10/02/23 20:49 5ND1,2-Dichlorobenzene 5.00 2.40 ug/L 10/02/23 20:49 5ND1,2-Dibromo-3-Chloropropane 5.00 0.485 ug/L 10/02/23 20:49 5ND1,2,4-Trichlorobenzene 5.00 0.750 ug/L 10/02/23 20:49 5NDHexachlorobutadiene 5.00 1.10 ug/L 10/02/23 20:49 59.42Xylenes, Total 5.00 1.25 ug/L 10/02/23 20:49 5ND1,2,3-Trichlorobenzene 5.00 0.430 ug/L 10/02/23 20:49 5107Naphthalene 25.0 1.60 ug/L 10/02/23 20:49 5NDtert-Butyl Formate 5.00 1.85 ug/L 10/02/23 20:49 5NDTert-butyl ethyl ether 50.0 1.05 ug/L 10/02/23 20:49 5NDTert-amyl methyl ether 100 12.5 ug/L 10/02/23 20:49 5236tert-Amyl alcohol 100 17.0 ug/L 10/02/23 20:49 5328tert-Butyl alcohol Toluene-d8 (Surr)101 70-130 10/02/23 20:49 5 Surrogate Dil FacAnalyzedPreparedQualifierLimits%Recovery 4-Bromofluorobenzene (Surr)105 10/02/23 20:49 570-130 Dibromofluoromethane (Surr)101 10/02/23 20:49 570-130 Eurofins Raleigh Page 12 of 31 10/6/2023 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 Client Sample Results Job ID: 752-11689-1Client: East Coast Environmental Project/Site: Grocery Bag Lab Sample ID: 752-11689-4Client Sample ID: MW-9 Matrix: WaterDate Collected: 09/18/23 13:45 Date Received: 09/19/23 13:20 Method: SM6200-B - Volatile Organic Compounds RL MDL ND 10.0 0.910 ug/L 10/02/23 21:19 10 Analyte Dil FacAnalyzedPreparedUnitDResultQualifier Dichlorodifluoromethane 10.0 0.500 ug/L 10/02/23 21:19 10NDChloromethane 10.0 0.830 ug/L 10/02/23 21:19 10NDVinyl chloride 10.0 2.80 ug/L 10/02/23 21:19 10NDBromomethane 10.0 1.80 ug/L 10/02/23 21:19 10NDChloroethane 10.0 1.50 ug/L 10/02/23 21:19 10NDTrichlorofluoromethane 10.0 1.50 ug/L 10/02/23 21:19 10ND1,1-Dichloroethene 20.0 0.700 ug/L 10/02/23 21:19 10NDMethylene Chloride 10.0 1.20 ug/L 10/02/23 21:19 10NDMethyl tert-butyl ether 10.0 1.10 ug/L 10/02/23 21:19 10NDtrans-1,2-Dichloroethene 10.0 0.500 ug/L 10/02/23 21:19 10ND1,1-Dichloroethane 10.0 2.10 ug/L 10/02/23 21:19 10NDIsopropyl ether 10.0 0.750 ug/L 10/02/23 21:19 10NDcis-1,2-Dichloroethene 10.0 1.20 ug/L 10/02/23 21:19 10ND2,2-Dichloropropane 10.0 1.10 ug/L 10/02/23 21:19 10NDBromochloromethane 10.0 0.830 ug/L 10/02/23 21:19 10NDChloroform 10.0 1.50 ug/L 10/02/23 21:19 10ND1,1,1-Trichloroethane 10.0 0.630 ug/L 10/02/23 21:19 10ND1,1-Dichloropropene 10.0 0.820 ug/L 10/02/23 21:19 10NDCarbon tetrachloride 10.0 0.820 ug/L 10/02/23 21:19 10ND1,2-Dichloroethane 10.0 0.500 ug/L 10/02/23 21:19 10NDBenzene 10.0 1.30 ug/L 10/02/23 21:19 10NDTrichloroethene 10.0 0.980 ug/L 10/02/23 21:19 10ND1,2-Dichloropropane 10.0 1.30 ug/L 10/02/23 21:19 10NDDibromomethane 10.0 1.00 ug/L 10/02/23 21:19 10NDBromodichloromethane 10.0 0.730 ug/L 10/02/23 21:19 10NDcis-1,3-Dichloropropene 10.0 0.530 ug/L 10/02/23 21:19 10NDToluene 10.0 0.800 ug/L 10/02/23 21:19 10NDtrans-1,3-Dichloropropene 10.0 0.680 ug/L 10/02/23 21:19 10ND1,1,2-Trichloroethane 10.0 1.50 ug/L 10/02/23 21:19 10ND1,3-Dichloropropane 10.0 0.990 ug/L 10/02/23 21:19 10NDTetrachloroethene 10.0 0.670 ug/L 10/02/23 21:19 10NDDibromochloromethane 10.0 4.20 ug/L 10/02/23 21:19 10ND1,2-Dibromoethane 10.0 0.690 ug/L 10/02/23 21:19 10NDChlorobenzene 10.0 0.910 ug/L 10/02/23 21:19 10ND1,1,1,2-Tetrachloroethane 1000 260 ug/L 10/02/23 21:19 10NDEthanol 10.0 1.00 ug/L 10/02/23 21:19 10NDEthylbenzene 10.0 3.50 ug/L 10/02/23 21:19 10NDFreon 113 20.0 1.80 ug/L 10/02/23 21:19 10NDm,p-Xylenes 10.0 0.880 ug/L 10/02/23 21:19 10NDo-Xylene 10.0 0.820 ug/L 10/02/23 21:19 10NDStyrene 10.0 2.00 ug/L 10/02/23 21:19 10NDBromoform 10.0 0.660 ug/L 10/02/23 21:19 10ND4-Isopropyltoluene 10.0 0.850 ug/L 10/02/23 21:19 10ND1,1,2,2-Tetrachloroethane 10.0 1.30 ug/L 10/02/23 21:19 10NDBromobenzene 10.0 1.50 ug/L 10/02/23 21:19 10ND1,2,3-Trichloropropane 10.0 0.730 ug/L 10/02/23 21:19 104.66 JN-Propylbenzene 10.0 1.00 ug/L 10/02/23 21:19 10ND2-Chlorotoluene 10.0 1.00 ug/L 10/02/23 21:19 10ND1,3,5-Trimethylbenzene Eurofins Raleigh Page 13 of 31 10/6/2023 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 Client Sample Results Job ID: 752-11689-1Client: East Coast Environmental Project/Site: Grocery Bag Lab Sample ID: 752-11689-4Client Sample ID: MW-9 Matrix: WaterDate Collected: 09/18/23 13:45 Date Received: 09/19/23 13:20 Method: SM6200-B - Volatile Organic Compounds (Continued) RL MDL ND 10.0 1.00 ug/L 10/02/23 21:19 10 Analyte Dil FacAnalyzedPreparedUnitDResultQualifier 4-Chlorotoluene 10.0 0.940 ug/L 10/02/23 21:19 10NDtert-Butylbenzene 10.0 0.670 ug/L 10/02/23 21:19 10ND1,2,4-Trimethylbenzene 10.0 0.530 ug/L 10/02/23 21:19 10NDsec-Butylbenzene 10.0 0.920 ug/L 10/02/23 21:19 10ND1,3-Dichlorobenzene 10.0 1.30 ug/L 10/02/23 21:19 105.59 JIsopropylbenzene 10.0 1.00 ug/L 10/02/23 21:19 10ND1,4-Dichlorobenzene 10.0 0.740 ug/L 10/02/23 21:19 10NDn-Butylbenzene 10.0 0.520 ug/L 10/02/23 21:19 10ND1,2-Dichlorobenzene 10.0 4.80 ug/L 10/02/23 21:19 10ND1,2-Dibromo-3-Chloropropane 10.0 0.970 ug/L 10/02/23 21:19 10ND1,2,4-Trichlorobenzene 10.0 1.50 ug/L 10/02/23 21:19 10NDHexachlorobutadiene 10.0 2.20 ug/L 10/02/23 21:19 10NDXylenes, Total 10.0 2.50 ug/L 10/02/23 21:19 10ND1,2,3-Trichlorobenzene 10.0 0.860 ug/L 10/02/23 21:19 1027.7Naphthalene 50.0 3.20 ug/L 10/02/23 21:19 10NDtert-Butyl Formate 10.0 3.70 ug/L 10/02/23 21:19 10NDTert-butyl ethyl ether 100 2.10 ug/L 10/02/23 21:19 10NDTert-amyl methyl ether 200 25.0 ug/L 10/02/23 21:19 1096.9 Jtert-Amyl alcohol 200 34.0 ug/L 10/02/23 21:19 10NDtert-Butyl alcohol Toluene-d8 (Surr)94 70-130 10/02/23 21:19 10 Surrogate Dil FacAnalyzedPreparedQualifierLimits%Recovery 4-Bromofluorobenzene (Surr)104 10/02/23 21:19 1070-130 Dibromofluoromethane (Surr)106 10/02/23 21:19 1070-130 Eurofins Raleigh Page 14 of 31 10/6/2023 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 Client Sample Results Job ID: 752-11689-1Client: East Coast Environmental Project/Site: Grocery Bag Lab Sample ID: 752-11689-5Client Sample ID: MW-10 Matrix: WaterDate Collected: 09/18/23 14:00 Date Received: 09/19/23 13:20 Method: SM6200-B - Volatile Organic Compounds RL MDL ND 1.00 0.0910 ug/L 10/02/23 19:21 1 Analyte Dil FacAnalyzedPreparedUnitDResultQualifier Dichlorodifluoromethane 1.00 0.0500 ug/L 10/02/23 19:21 1NDChloromethane 1.00 0.0830 ug/L 10/02/23 19:21 1NDVinyl chloride 1.00 0.280 ug/L 10/02/23 19:21 1NDBromomethane 1.00 0.180 ug/L 10/02/23 19:21 1NDChloroethane 1.00 0.150 ug/L 10/02/23 19:21 1NDTrichlorofluoromethane 1.00 0.150 ug/L 10/02/23 19:21 1ND1,1-Dichloroethene 2.00 0.0700 ug/L 10/02/23 19:21 1NDMethylene Chloride 1.00 0.120 ug/L 10/02/23 19:21 1NDMethyl tert-butyl ether 1.00 0.110 ug/L 10/02/23 19:21 1NDtrans-1,2-Dichloroethene 1.00 0.0500 ug/L 10/02/23 19:21 1ND1,1-Dichloroethane 1.00 0.210 ug/L 10/02/23 19:21 1NDIsopropyl ether 1.00 0.0750 ug/L 10/02/23 19:21 1NDcis-1,2-Dichloroethene 1.00 0.120 ug/L 10/02/23 19:21 1ND2,2-Dichloropropane 1.00 0.110 ug/L 10/02/23 19:21 1NDBromochloromethane 1.00 0.0830 ug/L 10/02/23 19:21 1NDChloroform 1.00 0.150 ug/L 10/02/23 19:21 1ND1,1,1-Trichloroethane 1.00 0.0630 ug/L 10/02/23 19:21 1ND1,1-Dichloropropene 1.00 0.0820 ug/L 10/02/23 19:21 1NDCarbon tetrachloride 1.00 0.0820 ug/L 10/02/23 19:21 1ND1,2-Dichloroethane 1.00 0.0500 ug/L 10/02/23 19:21 1NDBenzene 1.00 0.130 ug/L 10/02/23 19:21 1NDTrichloroethene 1.00 0.0980 ug/L 10/02/23 19:21 1ND1,2-Dichloropropane 1.00 0.130 ug/L 10/02/23 19:21 1NDDibromomethane 1.00 0.100 ug/L 10/02/23 19:21 1NDBromodichloromethane 1.00 0.0730 ug/L 10/02/23 19:21 1NDcis-1,3-Dichloropropene 1.00 0.0530 ug/L 10/02/23 19:21 1NDToluene 1.00 0.0800 ug/L 10/02/23 19:21 1NDtrans-1,3-Dichloropropene 1.00 0.0680 ug/L 10/02/23 19:21 1ND1,1,2-Trichloroethane 1.00 0.150 ug/L 10/02/23 19:21 1ND1,3-Dichloropropane 1.00 0.0990 ug/L 10/02/23 19:21 1NDTetrachloroethene 1.00 0.0670 ug/L 10/02/23 19:21 1NDDibromochloromethane 1.00 0.420 ug/L 10/02/23 19:21 1ND1,2-Dibromoethane 1.00 0.0690 ug/L 10/02/23 19:21 1NDChlorobenzene 1.00 0.0910 ug/L 10/02/23 19:21 1ND1,1,1,2-Tetrachloroethane 100 26.0 ug/L 10/02/23 19:21 1NDEthanol 1.00 0.100 ug/L 10/02/23 19:21 1NDEthylbenzene 1.00 0.350 ug/L 10/02/23 19:21 1NDFreon 113 2.00 0.180 ug/L 10/02/23 19:21 1NDm,p-Xylenes 1.00 0.0880 ug/L 10/02/23 19:21 1NDo-Xylene 1.00 0.0820 ug/L 10/02/23 19:21 1NDStyrene 1.00 0.200 ug/L 10/02/23 19:21 1NDBromoform 1.00 0.0660 ug/L 10/02/23 19:21 1ND4-Isopropyltoluene 1.00 0.0850 ug/L 10/02/23 19:21 1ND1,1,2,2-Tetrachloroethane 1.00 0.130 ug/L 10/02/23 19:21 1NDBromobenzene 1.00 0.150 ug/L 10/02/23 19:21 1ND1,2,3-Trichloropropane 1.00 0.0730 ug/L 10/02/23 19:21 1NDN-Propylbenzene 1.00 0.100 ug/L 10/02/23 19:21 1ND2-Chlorotoluene 1.00 0.100 ug/L 10/02/23 19:21 1ND1,3,5-Trimethylbenzene Eurofins Raleigh Page 15 of 31 10/6/2023 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 Client Sample Results Job ID: 752-11689-1Client: East Coast Environmental Project/Site: Grocery Bag Lab Sample ID: 752-11689-5Client Sample ID: MW-10 Matrix: WaterDate Collected: 09/18/23 14:00 Date Received: 09/19/23 13:20 Method: SM6200-B - Volatile Organic Compounds (Continued) RL MDL ND 1.00 0.100 ug/L 10/02/23 19:21 1 Analyte Dil FacAnalyzedPreparedUnitDResultQualifier 4-Chlorotoluene 1.00 0.0940 ug/L 10/02/23 19:21 1NDtert-Butylbenzene 1.00 0.0670 ug/L 10/02/23 19:21 1ND1,2,4-Trimethylbenzene 1.00 0.0530 ug/L 10/02/23 19:21 1NDsec-Butylbenzene 1.00 0.0920 ug/L 10/02/23 19:21 1ND1,3-Dichlorobenzene 1.00 0.130 ug/L 10/02/23 19:21 1NDIsopropylbenzene 1.00 0.100 ug/L 10/02/23 19:21 1ND1,4-Dichlorobenzene 1.00 0.0740 ug/L 10/02/23 19:21 1NDn-Butylbenzene 1.00 0.0520 ug/L 10/02/23 19:21 1ND1,2-Dichlorobenzene 1.00 0.480 ug/L 10/02/23 19:21 1ND1,2-Dibromo-3-Chloropropane 1.00 0.0970 ug/L 10/02/23 19:21 1ND1,2,4-Trichlorobenzene 1.00 0.150 ug/L 10/02/23 19:21 1NDHexachlorobutadiene 1.00 0.220 ug/L 10/02/23 19:21 1NDXylenes, Total 1.00 0.250 ug/L 10/02/23 19:21 1ND1,2,3-Trichlorobenzene 1.00 0.0860 ug/L 10/02/23 19:21 1NDNaphthalene 5.00 0.320 ug/L 10/02/23 19:21 1NDtert-Butyl Formate 1.00 0.370 ug/L 10/02/23 19:21 1NDTert-butyl ethyl ether 10.0 0.210 ug/L 10/02/23 19:21 1NDTert-amyl methyl ether 20.0 2.50 ug/L 10/02/23 19:21 1NDtert-Amyl alcohol 20.0 3.40 ug/L 10/02/23 19:21 1NDtert-Butyl alcohol Toluene-d8 (Surr)98 70-130 10/02/23 19:21 1 Surrogate Dil FacAnalyzedPreparedQualifierLimits%Recovery 4-Bromofluorobenzene (Surr)104 10/02/23 19:21 170-130 Dibromofluoromethane (Surr)102 10/02/23 19:21 170-130 Eurofins Raleigh Page 16 of 31 10/6/2023 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 Surrogate Summary Job ID: 752-11689-1Client: East Coast Environmental Project/Site: Grocery Bag Method: SM6200-B - Volatile Organic Compounds Prep Type: Total/NAMatrix: Water Lab Sample ID Client Sample ID (70-130)(70-130)(70-130) TOL BFB DBFM 102 103 98752-11689-1 Percent Surrogate Recovery (Acceptance Limits) MW-1 96 104 99752-11689-2 MW-2 101 105 101752-11689-3 MW-5 94 104 106752-11689-4 MW-9 98 104 102752-11689-5 MW-10 98 101 109LCS 752-4657/6 Lab Control Sample 95 101 99LCS 752-4657/8 Lab Control Sample 96 102 99LCSD 752-4657/7 Lab Control Sample Dup 100 99 103MB 752-4657/10 Method Blank 98 102 103MRL 752-4657/17 Lab Control Sample 98 106 105MRL 752-4657/5 Lab Control Sample Surrogate Legend TOL = Toluene-d8 (Surr) BFB = 4-Bromofluorobenzene (Surr) DBFM = Dibromofluoromethane (Surr) Eurofins Raleigh Page 17 of 31 10/6/2023 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 QC Sample Results Job ID: 752-11689-1Client: East Coast Environmental Project/Site: Grocery Bag Method: SM6200-B - Volatile Organic Compounds Client Sample ID: Method BlankLab Sample ID: MB 752-4657/10 Matrix: Water Prep Type: Total/NA Analysis Batch: 4657 RL MDL Dichlorodifluoromethane ND 1.00 0.0910 ug/L 10/02/23 18:51 1 MB MB Analyte Dil FacAnalyzedPreparedDUnitResultQualifier ND 0.05001.00 ug/L 10/02/23 18:51 1Chloromethane ND 0.08301.00 ug/L 10/02/23 18:51 1Vinyl chloride ND 0.2801.00 ug/L 10/02/23 18:51 1Bromomethane ND 0.1801.00 ug/L 10/02/23 18:51 1Chloroethane ND 0.1501.00 ug/L 10/02/23 18:51 1Trichlorofluoromethane ND 0.1501.00 ug/L 10/02/23 18:51 11,1-Dichloroethene 0.1148 J 0.07002.00 ug/L 10/02/23 18:51 1Methylene Chloride ND 0.1201.00 ug/L 10/02/23 18:51 1Methyl tert-butyl ether ND 0.1101.00 ug/L 10/02/23 18:51 1trans-1,2-Dichloroethene ND 0.05001.00 ug/L 10/02/23 18:51 11,1-Dichloroethane ND 0.2101.00 ug/L 10/02/23 18:51 1Isopropyl ether ND 0.07501.00 ug/L 10/02/23 18:51 1cis-1,2-Dichloroethene ND 0.1201.00 ug/L 10/02/23 18:51 12,2-Dichloropropane ND 0.1101.00 ug/L 10/02/23 18:51 1Bromochloromethane ND 0.08301.00 ug/L 10/02/23 18:51 1Chloroform ND 0.1501.00 ug/L 10/02/23 18:51 11,1,1-Trichloroethane ND 0.06301.00 ug/L 10/02/23 18:51 11,1-Dichloropropene ND 0.08201.00 ug/L 10/02/23 18:51 1Carbon tetrachloride ND 0.08201.00 ug/L 10/02/23 18:51 11,2-Dichloroethane ND 0.05001.00 ug/L 10/02/23 18:51 1Benzene ND 0.1301.00 ug/L 10/02/23 18:51 1Trichloroethene ND 0.09801.00 ug/L 10/02/23 18:51 11,2-Dichloropropane ND 0.1301.00 ug/L 10/02/23 18:51 1Dibromomethane ND 0.1001.00 ug/L 10/02/23 18:51 1Bromodichloromethane ND 0.07301.00 ug/L 10/02/23 18:51 1cis-1,3-Dichloropropene ND 0.05301.00 ug/L 10/02/23 18:51 1Toluene ND 0.08001.00 ug/L 10/02/23 18:51 1trans-1,3-Dichloropropene ND 0.06801.00 ug/L 10/02/23 18:51 11,1,2-Trichloroethane ND 0.1501.00 ug/L 10/02/23 18:51 11,3-Dichloropropane ND 0.09901.00 ug/L 10/02/23 18:51 1Tetrachloroethene ND 0.06701.00 ug/L 10/02/23 18:51 1Dibromochloromethane ND 0.4201.00 ug/L 10/02/23 18:51 11,2-Dibromoethane ND 0.06901.00 ug/L 10/02/23 18:51 1Chlorobenzene ND 0.09101.00 ug/L 10/02/23 18:51 11,1,1,2-Tetrachloroethane ND 26.0100 ug/L 10/02/23 18:51 1Ethanol ND 0.1001.00 ug/L 10/02/23 18:51 1Ethylbenzene ND 0.3501.00 ug/L 10/02/23 18:51 1Freon 113 ND 0.1802.00 ug/L 10/02/23 18:51 1m,p-Xylenes ND 0.08801.00 ug/L 10/02/23 18:51 1o-Xylene ND 0.08201.00 ug/L 10/02/23 18:51 1Styrene ND 0.2001.00 ug/L 10/02/23 18:51 1Bromoform ND 0.06601.00 ug/L 10/02/23 18:51 14-Isopropyltoluene ND 0.08501.00 ug/L 10/02/23 18:51 11,1,2,2-Tetrachloroethane ND 0.1301.00 ug/L 10/02/23 18:51 1Bromobenzene ND 0.1501.00 ug/L 10/02/23 18:51 11,2,3-Trichloropropane ND 0.07301.00 ug/L 10/02/23 18:51 1N-Propylbenzene ND 0.1001.00 ug/L 10/02/23 18:51 12-Chlorotoluene Eurofins Raleigh Page 18 of 31 10/6/2023 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 QC Sample Results Job ID: 752-11689-1Client: East Coast Environmental Project/Site: Grocery Bag Method: SM6200-B - Volatile Organic Compounds (Continued) Client Sample ID: Method BlankLab Sample ID: MB 752-4657/10 Matrix: Water Prep Type: Total/NA Analysis Batch: 4657 RL MDL 1,3,5-Trimethylbenzene ND 1.00 0.100 ug/L 10/02/23 18:51 1 MB MB Analyte Dil FacAnalyzedPreparedDUnitResultQualifier ND 0.1001.00 ug/L 10/02/23 18:51 14-Chlorotoluene ND 0.09401.00 ug/L 10/02/23 18:51 1tert-Butylbenzene ND 0.06701.00 ug/L 10/02/23 18:51 11,2,4-Trimethylbenzene ND 0.05301.00 ug/L 10/02/23 18:51 1sec-Butylbenzene ND 0.09201.00 ug/L 10/02/23 18:51 11,3-Dichlorobenzene ND 0.1301.00 ug/L 10/02/23 18:51 1Isopropylbenzene ND 0.1001.00 ug/L 10/02/23 18:51 11,4-Dichlorobenzene ND 0.07401.00 ug/L 10/02/23 18:51 1n-Butylbenzene ND 0.05201.00 ug/L 10/02/23 18:51 11,2-Dichlorobenzene ND 0.4801.00 ug/L 10/02/23 18:51 11,2-Dibromo-3-Chloropropane ND 0.09701.00 ug/L 10/02/23 18:51 11,2,4-Trichlorobenzene ND 0.1501.00 ug/L 10/02/23 18:51 1Hexachlorobutadiene ND 0.2201.00 ug/L 10/02/23 18:51 1Xylenes, Total ND 0.2501.00 ug/L 10/02/23 18:51 11,2,3-Trichlorobenzene ND 0.08601.00 ug/L 10/02/23 18:51 1Naphthalene ND 0.3205.00 ug/L 10/02/23 18:51 1tert-Butyl Formate ND 0.3701.00 ug/L 10/02/23 18:51 1Tert-butyl ethyl ether ND 0.21010.0 ug/L 10/02/23 18:51 1Tert-amyl methyl ether ND 2.5020.0 ug/L 10/02/23 18:51 1tert-Amyl alcohol ND 3.4020.0 ug/L 10/02/23 18:51 1tert-Butyl alcohol Toluene-d8 (Surr)100 70-130 10/02/23 18:51 1 MB MB Surrogate Dil FacPreparedAnalyzedQualifierLimits%Recovery 99 10/02/23 18:51 14-Bromofluorobenzene (Surr)70-130 103 10/02/23 18:51 1Dibromofluoromethane (Surr)70-130 Client Sample ID: Lab Control SampleLab Sample ID: LCS 752-4657/6 Matrix: Water Prep Type: Total/NA Analysis Batch: 4657 Dichlorodifluoromethane 20.0 22.54 ug/L 113 60 -140 Analyte LCS LCS DUnitResultQualifier %Rec Spike Added %Rec Limits Chloromethane 20.0 18.55 ug/L 93 60 -140 Vinyl chloride 20.0 17.84 ug/L 89 60 -140 Bromomethane 20.0 16.15 ug/L 81 60 -140 Chloroethane 20.0 20.14 ug/L 101 60 -140 Trichlorofluoromethane 20.0 23.33 ug/L 117 60 -140 1,1-Dichloroethene 20.0 20.68 ug/L 103 70 -130 Methylene Chloride 20.0 20.97 ug/L 105 70 -130 Methyl tert-butyl ether 20.0 20.71 ug/L 104 70 -130 trans-1,2-Dichloroethene 20.0 20.18 ug/L 101 70 -130 1,1-Dichloroethane 20.0 20.28 ug/L 101 70 -130 Isopropyl ether 20.0 21.41 ug/L 107 70 -130 cis-1,2-Dichloroethene 20.0 20.37 ug/L 102 70 -130 2,2-Dichloropropane 20.0 21.28 ug/L 106 70 -130 Bromochloromethane 20.0 19.56 ug/L 98 70 -130 Chloroform 20.0 18.92 ug/L 95 70 -130 Eurofins Raleigh Page 19 of 31 10/6/2023 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 QC Sample Results Job ID: 752-11689-1Client: East Coast Environmental Project/Site: Grocery Bag Method: SM6200-B - Volatile Organic Compounds (Continued) Client Sample ID: Lab Control SampleLab Sample ID: LCS 752-4657/6 Matrix: Water Prep Type: Total/NA Analysis Batch: 4657 1,1,1-Trichloroethane 20.0 20.58 ug/L 103 70 -130 Analyte LCS LCS DUnitResultQualifier %Rec Spike Added %Rec Limits 1,1-Dichloropropene 20.0 19.32 ug/L 97 70 -130 Carbon tetrachloride 20.0 20.15 ug/L 101 70 -130 1,2-Dichloroethane 20.0 18.40 ug/L 92 70 -130 Benzene 20.0 18.70 ug/L 94 70 -130 Trichloroethene 20.0 17.63 ug/L 88 70 -130 1,2-Dichloropropane 20.0 19.54 ug/L 98 70 -130 Dibromomethane 20.0 18.01 ug/L 90 70 -130 Bromodichloromethane 20.0 19.23 ug/L 96 70 -130 cis-1,3-Dichloropropene 20.0 18.45 ug/L 92 70 -130 Toluene 20.0 17.73 ug/L 89 70 -130 trans-1,3-Dichloropropene 20.0 19.86 ug/L 99 70 -130 1,1,2-Trichloroethane 20.0 17.59 ug/L 88 70 -130 1,3-Dichloropropane 20.0 17.66 ug/L 88 70 -130 Tetrachloroethene 20.0 19.03 ug/L 95 70 -130 Dibromochloromethane 20.0 18.47 ug/L 92 70 -130 1,2-Dibromoethane 20.0 18.15 ug/L 91 70 -130 Chlorobenzene 20.0 18.46 ug/L 92 70 -130 1,1,1,2-Tetrachloroethane 20.0 20.58 ug/L 103 70 -130 Ethanol 100 100.9 ug/L 101 70 -130 Ethylbenzene 20.0 17.58 ug/L 88 70 -130 Freon 113 40.0 45.91 ug/L 115 70 -130 m,p-Xylenes 40.0 36.42 ug/L 91 70 -130 o-Xylene 20.0 17.67 ug/L 88 70 -130 Styrene 20.0 17.86 ug/L 89 70 -130 Bromoform 20.0 21.26 ug/L 106 70 -130 4-Isopropyltoluene 20.0 19.38 ug/L 97 70 -130 1,1,2,2-Tetrachloroethane 20.0 18.75 ug/L 94 70 -130 Bromobenzene 20.0 16.68 ug/L 83 70 -130 1,2,3-Trichloropropane 20.0 18.49 ug/L 92 70 -130 N-Propylbenzene 20.0 18.15 ug/L 91 70 -130 2-Chlorotoluene 20.0 18.27 ug/L 91 70 -130 1,3,5-Trimethylbenzene 20.0 17.89 ug/L 89 70 -130 4-Chlorotoluene 20.0 18.89 ug/L 94 70 -130 tert-Butylbenzene 20.0 19.89 ug/L 99 70 -130 1,2,4-Trimethylbenzene 20.0 19.35 ug/L 97 70 -130 sec-Butylbenzene 20.0 19.33 ug/L 97 70 -130 1,3-Dichlorobenzene 20.0 18.38 ug/L 92 70 -130 Isopropylbenzene 20.0 18.16 ug/L 91 70 -130 1,4-Dichlorobenzene 20.0 19.34 ug/L 97 70 -130 n-Butylbenzene 20.0 18.12 ug/L 91 70 -130 1,2-Dichlorobenzene 20.0 19.05 ug/L 95 70 -130 1,2-Dibromo-3-Chloropropane 20.0 20.22 ug/L 101 70 -130 1,2,4-Trichlorobenzene 20.0 18.43 ug/L 92 70 -130 Hexachlorobutadiene 20.0 16.33 ug/L 82 70 -130 Xylenes, Total 60.0 54.09 ug/L 90 70 -130 1,2,3-Trichlorobenzene 20.0 18.67 ug/L 93 70 -130 Naphthalene 20.0 18.83 ug/L 94 70 -130 Eurofins Raleigh Page 20 of 31 10/6/2023 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 QC Sample Results Job ID: 752-11689-1Client: East Coast Environmental Project/Site: Grocery Bag Method: SM6200-B - Volatile Organic Compounds (Continued) Client Sample ID: Lab Control SampleLab Sample ID: LCS 752-4657/6 Matrix: Water Prep Type: Total/NA Analysis Batch: 4657 Toluene-d8 (Surr)70 -130 Surrogate 98 LCS LCS Qualifier Limits%Recovery 1014-Bromofluorobenzene (Surr)70 -130 109Dibromofluoromethane (Surr)70 -130 Client Sample ID: Lab Control SampleLab Sample ID: LCS 752-4657/8 Matrix: Water Prep Type: Total/NA Analysis Batch: 4657 tert-Butyl Formate 20.0 23.69 ug/L 118 70 -130 Analyte LCS LCS DUnitResultQualifier %Rec Spike Added %Rec Limits Tert-butyl ethyl ether 20.0 17.74 ug/L 89 70 -130 Tert-amyl methyl ether 20.0 18.15 ug/L 91 70 -130 tert-Amyl alcohol 200 157.0 ug/L 78 70 -130 tert-Butyl alcohol 200 158.2 ug/L 79 70 -130 Toluene-d8 (Surr)70 -130 Surrogate 95 LCS LCS Qualifier Limits%Recovery 1014-Bromofluorobenzene (Surr)70 -130 99Dibromofluoromethane (Surr)70 -130 Client Sample ID: Lab Control Sample DupLab Sample ID: LCSD 752-4657/7 Matrix: Water Prep Type: Total/NA Analysis Batch: 4657 Dichlorodifluoromethane 20.0 20.18 ug/L 101 60 -140 11 Analyte LCSD LCSD DUnitResultQualifier %Rec Spike Added %Rec Limits LimitRPD RPD Chloromethane 20.0 16.53 ug/L 83 60 -140 12 Vinyl chloride 20.0 17.48 ug/L 87 60 -140 2 Bromomethane 20.0 15.98 ug/L 80 60 -140 1 Chloroethane 20.0 19.08 ug/L 95 60 -140 5 Trichlorofluoromethane 20.0 21.98 ug/L 110 60 -140 6 1,1-Dichloroethene 20.0 19.19 ug/L 96 70 -130 7 Methylene Chloride 20.0 19.88 ug/L 99 70 -130 5 Methyl tert-butyl ether 20.0 20.37 ug/L 102 70 -130 2 trans-1,2-Dichloroethene 20.0 18.85 ug/L 94 70 -130 7 1,1-Dichloroethane 20.0 18.37 ug/L 92 70 -130 10 Isopropyl ether 20.0 20.81 ug/L 104 70 -130 3 cis-1,2-Dichloroethene 20.0 19.35 ug/L 97 70 -130 5 2,2-Dichloropropane 20.0 18.60 ug/L 93 70 -130 13 Bromochloromethane 20.0 19.94 ug/L 100 70 -130 2 Chloroform 20.0 18.89 ug/L 94 70 -130 0 1,1,1-Trichloroethane 20.0 18.73 ug/L 94 70 -130 9 1,1-Dichloropropene 20.0 18.90 ug/L 95 70 -130 2 Carbon tetrachloride 20.0 18.29 ug/L 91 70 -130 10 1,2-Dichloroethane 20.0 19.25 ug/L 96 70 -130 5 Benzene 20.0 18.30 ug/L 92 70 -130 2 Trichloroethene 20.0 17.79 ug/L 89 70 -130 1 1,2-Dichloropropane 20.0 19.47 ug/L 97 70 -130 0 Eurofins Raleigh Page 21 of 31 10/6/2023 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 QC Sample Results Job ID: 752-11689-1Client: East Coast Environmental Project/Site: Grocery Bag Method: SM6200-B - Volatile Organic Compounds (Continued) Client Sample ID: Lab Control Sample DupLab Sample ID: LCSD 752-4657/7 Matrix: Water Prep Type: Total/NA Analysis Batch: 4657 Dibromomethane 20.0 18.66 ug/L 93 70 -130 4 Analyte LCSD LCSD DUnitResultQualifier %Rec Spike Added %Rec Limits LimitRPD RPD Bromodichloromethane 20.0 17.77 ug/L 89 70 -130 8 cis-1,3-Dichloropropene 20.0 19.08 ug/L 95 70 -130 3 Toluene 20.0 16.57 ug/L 83 70 -130 7 trans-1,3-Dichloropropene 20.0 18.46 ug/L 92 70 -130 7 1,1,2-Trichloroethane 20.0 16.18 ug/L 81 70 -130 8 1,3-Dichloropropane 20.0 17.27 ug/L 86 70 -130 2 Tetrachloroethene 20.0 16.81 ug/L 84 70 -130 12 Dibromochloromethane 20.0 17.89 ug/L 89 70 -130 3 1,2-Dibromoethane 20.0 17.45 ug/L 87 70 -130 4 Chlorobenzene 20.0 17.19 ug/L 86 70 -130 7 1,1,1,2-Tetrachloroethane 20.0 17.18 ug/L 86 70 -130 18 Ethanol 100 116.5 ug/L 117 70 -130 14 Ethylbenzene 20.0 16.97 ug/L 85 70 -130 4 Freon 113 40.0 43.79 ug/L 109 70 -130 5 m,p-Xylenes 40.0 34.90 ug/L 87 70 -130 4 o-Xylene 20.0 16.76 ug/L 84 70 -130 5 Styrene 20.0 16.92 ug/L 85 70 -130 5 Bromoform 20.0 20.77 ug/L 104 70 -130 2 4-Isopropyltoluene 20.0 19.55 ug/L 98 70 -130 1 1,1,2,2-Tetrachloroethane 20.0 17.48 ug/L 87 70 -130 7 Bromobenzene 20.0 16.46 ug/L 82 70 -130 1 1,2,3-Trichloropropane 20.0 16.15 ug/L 81 70 -130 14 N-Propylbenzene 20.0 17.15 ug/L 86 70 -130 6 2-Chlorotoluene 20.0 18.55 ug/L 93 70 -130 2 1,3,5-Trimethylbenzene 20.0 17.08 ug/L 85 70 -130 5 4-Chlorotoluene 20.0 17.25 ug/L 86 70 -130 9 tert-Butylbenzene 20.0 20.93 ug/L 105 70 -130 5 1,2,4-Trimethylbenzene 20.0 18.40 ug/L 92 70 -130 5 sec-Butylbenzene 20.0 18.70 ug/L 94 70 -130 3 1,3-Dichlorobenzene 20.0 18.80 ug/L 94 70 -130 2 Isopropylbenzene 20.0 16.61 ug/L 83 70 -130 9 1,4-Dichlorobenzene 20.0 18.89 ug/L 94 70 -130 2 n-Butylbenzene 20.0 17.15 ug/L 86 70 -130 6 1,2-Dichlorobenzene 20.0 19.04 ug/L 95 70 -130 0 1,2-Dibromo-3-Chloropropane 20.0 18.35 ug/L 92 70 -130 10 1,2,4-Trichlorobenzene 20.0 19.09 ug/L 95 70 -130 4 Hexachlorobutadiene 20.0 17.56 ug/L 88 70 -130 7 Xylenes, Total 60.0 51.66 ug/L 86 70 -130 5 1,2,3-Trichlorobenzene 20.0 18.33 ug/L 92 70 -130 2 Naphthalene 20.0 19.14 ug/L 96 70 -130 2 Toluene-d8 (Surr)70 -130 Surrogate 96 LCSD LCSD Qualifier Limits%Recovery 1024-Bromofluorobenzene (Surr)70 -130 99Dibromofluoromethane (Surr)70 -130 Eurofins Raleigh Page 22 of 31 10/6/2023 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 QC Sample Results Job ID: 752-11689-1Client: East Coast Environmental Project/Site: Grocery Bag Method: SM6200-B - Volatile Organic Compounds (Continued) Client Sample ID: Lab Control SampleLab Sample ID: MRL 752-4657/17 Matrix: Water Prep Type: Total/NA Analysis Batch: 4657 tert-Butyl Formate 1.00 1.339 J ug/L 134 Analyte MRL MRL DUnitResultQualifier %Rec Spike Added %Rec Limits Tert-butyl ethyl ether 1.00 0.9889 J ug/L 99 Tert-amyl methyl ether 1.00 0.8696 J ug/L 87 tert-Amyl alcohol 10.0 3.590 J ug/L 36 tert-Butyl alcohol 10.0 8.885 J ug/L 89 Toluene-d8 (Surr)70 -130 Surrogate 98 MRL MRL Qualifier Limits%Recovery 1024-Bromofluorobenzene (Surr)70 -130 103Dibromofluoromethane (Surr)70 -130 Client Sample ID: Lab Control SampleLab Sample ID: MRL 752-4657/5 Matrix: Water Prep Type: Total/NA Analysis Batch: 4657 Dichlorodifluoromethane 1.00 ND ug/L 0 Analyte MRL MRL DUnitResultQualifier %Rec Spike Added %Rec Limits Chloromethane 1.00 0.2676 J ug/L 27 Vinyl chloride 1.00 0.4366 J ug/L 44 Bromomethane 1.00 0.3322 J ug/L 33 Chloroethane 1.00 0.3095 J ug/L 31 Trichlorofluoromethane 1.00 0.5594 J ug/L 56 1,1-Dichloroethene 1.00 1.083 ug/L 108 Methylene Chloride 1.00 0.7448 J ug/L 74 Methyl tert-butyl ether 1.00 1.134 ug/L 113 trans-1,2-Dichloroethene 1.00 0.4670 J ug/L 47 1,1-Dichloroethane 1.00 1.099 ug/L 110 Isopropyl ether 1.00 1.218 ug/L 122 cis-1,2-Dichloroethene 1.00 1.156 ug/L 116 2,2-Dichloropropane 1.00 1.664 ug/L 166 Bromochloromethane 1.00 0.9298 J ug/L 93 Chloroform 1.00 1.010 ug/L 101 1,1,1-Trichloroethane 1.00 1.167 ug/L 117 1,1-Dichloropropene 1.00 1.089 ug/L 109 Carbon tetrachloride 1.00 0.7652 J ug/L 77 1,2-Dichloroethane 1.00 0.8183 J ug/L 82 Benzene 1.00 1.097 ug/L 110 Trichloroethene 1.00 1.386 ug/L 139 1,2-Dichloropropane 1.00 1.129 ug/L 113 Dibromomethane 1.00 1.284 ug/L 128 Bromodichloromethane 1.00 0.7803 J ug/L 78 cis-1,3-Dichloropropene 1.00 1.152 ug/L 115 Toluene 1.00 1.064 ug/L 106 trans-1,3-Dichloropropene 1.00 0.9698 J ug/L 97 1,1,2-Trichloroethane 1.00 1.126 ug/L 113 1,3-Dichloropropane 1.00 1.315 ug/L 132 Tetrachloroethene 1.00 0.8893 J ug/L 89 Dibromochloromethane 1.00 0.6990 J ug/L 70 Eurofins Raleigh Page 23 of 31 10/6/2023 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 QC Sample Results Job ID: 752-11689-1Client: East Coast Environmental Project/Site: Grocery Bag Method: SM6200-B - Volatile Organic Compounds (Continued) Client Sample ID: Lab Control SampleLab Sample ID: MRL 752-4657/5 Matrix: Water Prep Type: Total/NA Analysis Batch: 4657 1,2-Dibromoethane 1.00 1.166 ug/L 117 Analyte MRL MRL DUnitResultQualifier %Rec Spike Added %Rec Limits Chlorobenzene 1.00 0.9994 J ug/L 100 1,1,1,2-Tetrachloroethane 1.00 1.002 ug/L 100 Ethanol 20.0 41.53 J ug/L 208 Ethylbenzene 1.00 0.9230 J ug/L 92 Freon 113 1.00 1.503 ug/L 150 m,p-Xylenes 2.00 2.169 ug/L 108 o-Xylene 1.00 0.9597 J ug/L 96 Styrene 1.00 1.021 ug/L 102 Bromoform 1.00 1.176 ug/L 118 4-Isopropyltoluene 1.00 0.9235 J ug/L 92 1,1,2,2-Tetrachloroethane 1.00 1.020 ug/L 102 Bromobenzene 1.00 0.9978 J ug/L 100 1,2,3-Trichloropropane 1.00 0.4417 J ug/L 44 N-Propylbenzene 1.00 1.060 ug/L 106 2-Chlorotoluene 1.00 1.082 ug/L 108 1,3,5-Trimethylbenzene 1.00 0.7768 J ug/L 78 4-Chlorotoluene 1.00 1.256 ug/L 126 tert-Butylbenzene 1.00 1.029 ug/L 103 1,2,4-Trimethylbenzene 1.00 1.008 ug/L 101 sec-Butylbenzene 1.00 0.8660 J ug/L 87 1,3-Dichlorobenzene 1.00 0.9078 J ug/L 91 Isopropylbenzene 1.00 1.025 ug/L 102 1,4-Dichlorobenzene 1.00 1.154 ug/L 115 n-Butylbenzene 1.00 0.8077 J ug/L 81 1,2-Dichlorobenzene 1.00 1.017 ug/L 102 1,2-Dibromo-3-Chloropropane 1.00 1.282 ug/L 128 1,2,4-Trichlorobenzene 1.00 1.406 ug/L 141 Hexachlorobutadiene 1.00 1.236 ug/L 124 Xylenes, Total 3.00 3.129 ug/L 104 1,2,3-Trichlorobenzene 1.00 1.099 ug/L 110 Naphthalene 1.00 1.039 ug/L 104 Toluene-d8 (Surr)70 -130 Surrogate 98 MRL MRL Qualifier Limits%Recovery 1064-Bromofluorobenzene (Surr)70 -130 105Dibromofluoromethane (Surr)70 -130 Eurofins Raleigh Page 24 of 31 10/6/2023 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 QC Association Summary Job ID: 752-11689-1Client: East Coast Environmental Project/Site: Grocery Bag GC/MS VOA Analysis Batch: 4657 Lab Sample ID Client Sample ID Prep Type Matrix Method Prep Batch Water SM6200-B752-11689-1 MW-1 Total/NA Water SM6200-B752-11689-2 MW-2 Total/NA Water SM6200-B752-11689-3 MW-5 Total/NA Water SM6200-B752-11689-4 MW-9 Total/NA Water SM6200-B752-11689-5 MW-10 Total/NA Water SM6200-BMB 752-4657/10 Method Blank Total/NA Water SM6200-BLCS 752-4657/6 Lab Control Sample Total/NA Water SM6200-BLCS 752-4657/8 Lab Control Sample Total/NA Water SM6200-BLCSD 752-4657/7 Lab Control Sample Dup Total/NA Water SM6200-BMRL 752-4657/17 Lab Control Sample Total/NA Water SM6200-BMRL 752-4657/5 Lab Control Sample Total/NA Eurofins Raleigh Page 25 of 31 10/6/2023 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 Lab Chronicle Client: East Coast Environmental Job ID: 752-11689-1 Project/Site: Grocery Bag Client Sample ID: MW-1 Lab Sample ID: 752-11689-1 Matrix: WaterDate Collected: 09/18/23 15:00 Date Received: 09/19/23 13:20 Analysis SM6200-B RY10/02/23 19:5050 EET ESC4657 Type Batch Method Batch Prep Type LabAnalystRun Prepared or Analyzed Initial Amount Amount Final Batch NumberFactor Dil Total/NA Instrument ID:CVGCMS4 Client Sample ID: MW-2 Lab Sample ID: 752-11689-2 Matrix: WaterDate Collected: 09/18/23 15:15 Date Received: 09/19/23 13:20 Analysis SM6200-B RY10/02/23 20:2020 EET ESC4657 Type Batch Method Batch Prep Type LabAnalystRun Prepared or Analyzed Initial Amount Amount Final Batch NumberFactor Dil Total/NA Instrument ID:CVGCMS4 Client Sample ID: MW-5 Lab Sample ID: 752-11689-3 Matrix: WaterDate Collected: 09/18/23 15:30 Date Received: 09/19/23 13:20 Analysis SM6200-B RY10/02/23 20:495 EET ESC4657 Type Batch Method Batch Prep Type LabAnalystRun Prepared or Analyzed Initial Amount Amount Final Batch NumberFactor Dil Total/NA Instrument ID:CVGCMS4 Client Sample ID: MW-9 Lab Sample ID: 752-11689-4 Matrix: WaterDate Collected: 09/18/23 13:45 Date Received: 09/19/23 13:20 Analysis SM6200-B RY10/02/23 21:1910 EET ESC4657 Type Batch Method Batch Prep Type LabAnalystRun Prepared or Analyzed Initial Amount Amount Final Batch NumberFactor Dil Total/NA Instrument ID:CVGCMS4 Client Sample ID: MW-10 Lab Sample ID: 752-11689-5 Matrix: WaterDate Collected: 09/18/23 14:00 Date Received: 09/19/23 13:20 Analysis SM6200-B RY10/02/23 19:211 EET ESC4657 Type Batch Method Batch Prep Type LabAnalystRun Prepared or Analyzed Initial Amount Amount Final Batch NumberFactor Dil Total/NA Instrument ID:CVGCMS4 Laboratory References: EET ESC = Eurofins Raleigh, 102-A Woodwinds Industrial Court, Cary, NC 27511, TEL (919)677-1669 Eurofins Raleigh Page 26 of 31 10/6/2023 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 Accreditation/Certification Summary Client: East Coast Environmental Job ID: 752-11689-1 Project/Site: Grocery Bag Laboratory: Eurofins Raleigh Unless otherwise noted, all analytes for this laboratory were covered under each accreditation/certification below. Authority Program Identification Number Expiration Date North Carolina (WW/SW)State 591 12-31-23 The following analytes are included in this report, but the laboratory is not certified by the governing authority. This list may include analytes for which the agency does not offer certification. Analysis Method Prep Method Matrix Analyte SM6200-B Water Freon 113 SM6200-B Water tert-Amyl alcohol SM6200-B Water Tert-amyl methyl ether SM6200-B Water tert-Butyl alcohol SM6200-B Water Tert-butyl ethyl ether SM6200-B Water tert-Butyl Formate Eurofins Raleigh Page 27 of 31 10/6/2023 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 Method Summary Job ID: 752-11689-1Client: East Coast Environmental Project/Site: Grocery Bag Method Method Description LaboratoryProtocol SMSM6200-B Volatile Organic Compounds EET ESC SMSM6200-B Purge and Trap EET ESC Protocol References: SM = "Standard Methods For The Examination Of Water And Wastewater" Laboratory References: EET ESC = Eurofins Raleigh, 102-A Woodwinds Industrial Court, Cary, NC 27511, TEL (919)677-1669 Eurofins Raleigh Page 28 of 31 10/6/2023 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 Sample Summary Client: East Coast Environmental Job ID: 752-11689-1 Project/Site: Grocery Bag Lab Sample ID Client Sample ID Matrix Collected Received 752-11689-1 MW-1 Water 09/18/23 15:00 09/19/23 13:20 752-11689-2 MW-2 Water 09/18/23 15:15 09/19/23 13:20 752-11689-3 MW-5 Water 09/18/23 15:30 09/19/23 13:20 752-11689-4 MW-9 Water 09/18/23 13:45 09/19/23 13:20 752-11689-5 MW-10 Water 09/18/23 14:00 09/19/23 13:20 Eurofins RaleighPage 29 of 31 10/6/2023 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 Page 30 of 31 10/6/2023 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 Login Sample Receipt Checklist Client: East Coast Environmental Job Number: 752-11689-1 SDG Number: Login Number: 11689 Question Answer Comment Creator: Yonish, Rachel List Source: Eurofins Raleigh List Number: 1 N/ARadioactivity wasn't checked or is </= background as measured by a survey meter. TrueThe cooler's custody seal, if present, is intact. TrueSample custody seals, if present, are intact. TrueThe cooler or samples do not appear to have been compromised or tampered with. TrueSamples were received on ice. TrueCooler Temperature is acceptable. TrueCooler Temperature is recorded. TrueCOC is present. TrueCOC is filled out in ink and legible. TrueCOC is filled out with all pertinent information. TrueIs the Field Sampler's name present on COC? TrueThere are no discrepancies between the containers received and the COC. TrueSamples are received within Holding Time (excluding tests with immediate HTs) TrueSample containers have legible labels. TrueContainers are not broken or leaking. TrueSample collection date/times are provided. TrueAppropriate sample containers are used. TrueSample bottles are completely filled. N/ASample Preservation Verified. TrueThere is sufficient vol. for all requested analyses, incl. any requested MS/MSDs TrueContainers requiring zero headspace have no headspace or bubble is <6mm (1/4"). TrueMultiphasic samples are not present. TrueSamples do not require splitting or compositing. N/AResidual Chlorine Checked. Eurofins Raleigh Page 31 of 31 10/6/2023 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15