Loading...
HomeMy WebLinkAboutFA-1034_19658_CA_LTR_20230616 2725 E. Millbrook Road, Suite 121 Raleigh, North Carolina 27604 Telephone 919-871-0999 www.atcgroupservices.com N.C. Engineering License No. C-1598 June 16, 2023 Mr. Hassan Osman North Carolina Department of Environmental Quality Division of Waste Management – Underground Storage Tank Section 1646 Mail Service Center Raleigh, North Carolina 27699 Re: Groundwater Monitoring Letter Report Reid Property 6898 Goldsboro Road Wade, Cumberland County, North Carolina NCDEQ Incident No. 19658 Dear Mr. Osman: ATC Associates of North Carolina, P.C. (ATC) is pleased to submit this letter report documenting groundwater sampling activities conducted at the site on May 4, 2023, at the Reid Property site located at 6898 Goldsboro Road in Wade, Cumberland County, North Carolina. These activities were performed based on an April 13, 2023, Task Authorization (TA-03) by the Trust Fund Branch of the Underground Storage Tank (UST) Section, Division of Waste Management (DWM), North Carolina Department of Environmental Quality (NCDEQ). The work is being performed as part of State Lead Contract #N122019A between NCDEQ and ATC. The site is currently developed with two single-story structures. One structure is the former petroleum service station and the other is a residence. Both structures are currently vacant. A site topographic map is included as Figure 1. A site map depicting pertinent site features is included as Figure 2. There is one active water supply well used for drinking (WSW-2), one active water supply well used for irrigation, and four inactive water supply wells within 1,000 feet of the site. One inactive water supply well is located on the site property. Water supply well information is included in Table 1. Water supply well locations are included as Figure 3. On May 4, 2023, ATC collected groundwater samples from MW-1 through MW-3. Light non- aqueous phase liquid (LNAPL) was not detected in any of the monitoring wells during the sampling event. Groundwater elevation data is included in Table 2. The groundwater samples were collected in laboratory-supplied, preserved containers; entered into chain of custody control; placed on ice; and shipped to North Carolina-accredited SGS North America Inc. (SGS) in Scott, Louisiana. The samples were analyzed by Standard Method 6200B for volatile organic compounds (VOCs) including petroleum constituents. The analytical results were compared to the North Carolina Title 15A, NCAC, Subchapter 2L, Part .0202 (2L Standards) for groundwater and Gross Contamination Levels (GCLs). Field notes from the sampling event are included in Appendix A. Reid Property June 16, 2023 Page 2 of 2 ATC Project No. SLC1965803 NCDEQ State Lead Program Based on the analytical results, the following compounds were detected above 2L Standards:  MW-1: Benzene (547 micrograms per liter [μg/L]), Ethylbenzene (678 μg/L), Xylenes (606.3 μg/L), Naphthalene (258 μg/L), 1,2,4-Trimethylbenzene (1,040 μg/L), and n- Propylbenzene (172 μg/L)  MW-3: Naphthalene (70.4 μg/L) No compounds exceeded GCLs. Current and historic groundwater analytical results are included as Table 3. Natural attenuation parameters recorded during the sampling event are included in Table 4. Laboratory analytical results are included in Appendix B. Concentrations of benzene, naphthalene, 1,2,4-trimethylbenzene, and n-propylbenzene in MW-1 and naphthalene in MW-3 have increased since February 2022. ATC attempted to determine the status of WSW-2 during field activities. The residential property associated with WSW-2 remains vacant at the time of the sampling event. ATC personnel noted overgrown grass on the property and no obvious signs of occupation. ATC has previously been unable to contact the property owner of WSW-2, and the property does not have an active water account. The horizontal and vertical extent of the groundwater plume have not been delineated; therefore, ATC does not recommend fate and transport modeling. Horizontal plume delineation is not feasible as ATC has not been able to obtain an access agreement to properties downgradient of the site. ATC recommends placing oxygen releasing compound socks in wells MW-1 and MW-3 followed by a sampling event six months after sock installation. If you have any questions or require additional information, please contact our office at (919) 871- 0999. Sincerely, ATC Associates of North Carolina, P.C. Brian Buchanan Ashley M. W. Offer, P.G. Project Scientist Senior Project Manager Direct Line: 919-573-1203 Direct Line: 919-573-1206 Email: brian.buchanan@oneatlas.com Email: ashley.offer@oneatlas.com Reid Property ATC Project No. SLC1965803 NCDEQ State Lead Program TABLES TABLE 1 WATER SUPPLY WELL INFORMATION REID PROPERTY 6898 GOLDSBORO ROAD WADE, CUMBERLAND COUNTY, NORTH CAROLINA NCDEQ INCIDENT #19658 Water Supply Well Property Owner(s)Mailing Address Property Owner Phone Number Property Address Distance from Source (feet) and Direction Connected to Municipal Water ? Usage & Comments Ramon Jesus Villa 59 Barefoot Lane 6898 Goldsboro Road (Parcel 1500-08-1122)Dunn, NC 28334 Wade, NC 28395 Vicky Walsh and Sarah Kelly PO Box 58270 6931 Goldsboro Road (Parcel 1500-08-3900)Fayetteville, NC 28305 Wade, NC 28395 Oak Ridge Pentecostal Holiness Church PO Box 113 5648 Eason Road (Parcel 1500-08-7302)Falcon, NC 28342 Wade, NC 28395 Michael P. Chase 6947 Goldsboro Road 6947 Goldsboro Road (Parcel 1500-08-4945)Wade, NC 28395 Wade, NC 28395 Bobby & Yolanda Barefoot 5634 Eason Road 5634 Eason Road (Parcel 1500-08-6161)Wade, NC 28395 Wade, NC 28395 Ruth Olive Williams 5553 Eason Road 5553 Eason Road (Parcel 1500-07-2996)Wade, NC 28395 Wade, NC 28395 Terry Seeley Jr.5498 Eason Road 5498 Eason Road (Parcel 1500-07-3369)Wade, NC 28395 Wade, NC 28395 Clifton Floyd Tyndall 7043 Goldsboro Road 7043 Goldsboro Road (Parcel #1500-18-1382)Wade, NC 28395 Wade, NC 28395 Clifton Floyd Tyndall 7043 Goldsboro Road 7024 Goldsboro Road (Parcel #1500-18-1382)Wade, NC 28395 Wade, NC 28395 910-242-6334 Unknown 919-484-6800 919-485-0290 910-484-4914 Yes Yes 165 feet Southwest 600 feet East 480 feet Northeast Yes Yes No WSW-6 WSW-7 1,020 ft South Yes Yes420 feet Southeast 540 feet East 405 feet Northeast 910-483-7382 910-977-6815 WSW-1 WSW-3 WSW-4 WSW-5 WSW-2 Well is damaged and not in use. Owner plans to install a new well in the future for drinking purposes. Drinking Inactive Irrigation Inactive Inactive Inactive. WSW is 23 ft deep. WSW-9 740 feet Northeast No Inactive WSW-8 1,050 ft East Yes InactiveUnknown Unknown TABLE 2 WELL CONSTRUCTION AND GROUNDWATER ELEVATION DATA REID PROPERTY 6898 GOLDSBORO ROAD WADE, CUMBERLAND COUNTY, NORTH CAROLINA NCDEQ INCIDENT #19658 Well ID Date Installed Well Casing depth (ft.) Screened Interval (ft.) Depth of Well (ft.) TOC Elev. (ft.) Date Measured Depth to Product Depth to Water Product Thickness Groundwater Elevation 11/10/2010 ND 7.78 NA 92.22 12/21/2010 ND 10.30 NA 89.70 1/30/2015 ND 6.28 NA 93.72 7/16/2015 ND 10.34 NA 89.66 2/26/2018 ND 5.05 NA 94.95 11/16/2018 ND 2.82 NA 97.18 7/8/2019 ND 11.21 NA 88.79 1/9/2020 ND 4.31 NA 95.69 2/11/2022 ND 5.88 NA 94.12 5/4/2023 ND 4.19 NA 95.81 7/16/2015 ND 9.96 NA 90.07 2/26/2018 ND 4.82 NA 95.21 11/16/2018 ND 3.70 NA 96.33 7/8/2019 ND 10.95 NA 89.08 1/9/2020 ND 4.31 NA 95.72 2/11/2022 ND 3.93 NA 96.10 5/4/2023 ND 3.03 NA 97.00 7/16/2015 ND 9.90 NA 89.65 2/26/2018 ND 1.77 NA 97.78 11/16/2018 ND 0.67 NA 98.88 7/8/2019 ND 10.03 NA 89.52 1/9/2020 ND 1.43 NA 98.12 2/11/2022 ND 1.08 NA 98.47 5/4/2023 ND 1.43 NA 98.12 Notes: 4. Monitoring wells MW-2 and MW-3 surveyed on July 2, 2015, using MW-1 as a benchmark. 99.55MW-3 7/2/2015 5 5-15 15 2. TOC = Top of casing. 3. NA = Not Applicable. 1. NM = Not Measured. MW-1 11/2/2010 5 5-15 15 100.00 MW-2 7/2/2015 5 5-15 15 100.03 TABLE 3 GROUNDWATER ANALYTICAL DATA REID PROPERTY 6898 GOLDSBORO ROAD WADE, CUMBERLAND COUNTY, NORTH CAROLINA NCDEQ INCIDENT #19658 BenzeneTolueneEthylbenzeneTotal XylenesNaphthaleneMTBEIsopropyl EtherIsopropylbenzene1,2,4-Trimethylbenzene1,3,5-Trimethylbenzenen-Butylbenzenesec-Butylbenzenetert-ButylbenzeneBromodichloromethaneChloroformChloromethane2-Chlorotoluene4-Chlorotoluene1,2-Dibromoethane1,2-Dichloroethane1,2-Dichloropropane2,2-Dichloropropane1,1-Dichloropropenecis-1,3-Dichloropropenetrans-1,3-Dichloropropenep-Isopropyltoluenen-PropylbenzeneStyrene1,1,2,2-Tetrachloroethane1,1,2-TrichloroethaneCarbon TetrachlorideHexachlorobutadieneVinyl Acetate1,2,3-TrichloropropaneMethylene Chloride11/10/2010 1,700 1,500 880 1,860 130 140 3.5 J 10 630 120 <0.17 26 <0.37 <0.55 <1.7 <1.7 <0.59 <0.19 9.9 67 <0.61 <0.60 <0.74 <0.90 <1.8 25 120 <0.15 <0.57 <0.31 --<1.7 --<3.3 -- 12/21/2010 250 110 260 315 42 11 <0.21 16 140 21 12 9.1 2.1 1.2 J 2.1 <0.70 14 11 0.98 J 1.1 J 0.80 J 0.90 J 8.1 25 23 9.0 39 18 0.68 J 1.2 J --<0.68 --19 -- 1/30/2015 620 410 1,000 1,274 200 32 <9.0 54 910 29 <2.7 8.5 J <4.8 <4.4 <7.2 <16 <3.5 <3.7 <4.4 <9.7 <5.6 <3.6 <6.4 <3.1 <2.8 9.0 J 140 <6.0 <6.2 <5.8 ----<67 <6.0 -- 7/16/2015 330 200 730 943 180 <4.5 <9 <5.6 910 <5 <2.7 12J <4.8 <4.4 <7.2 <8 <3.5 <3.7 <4.4 <9.7 <5.6 <3.6 <6.4 <3.1 <2.8 12J 61 <6 <6.2 <5.8 ----<67 <6 -- 2/26/2018 123 35.2 1,180 1,210 285 <10 <10 76.5 1,390 24.2 19.1 15.0 <10 <2.0 <10 <4.0 <4.0 <2.0 <2.0 <4.0 <4.0 <2.0 <4.0 <4.0 <4.0 14.7 225 <10 <2.0 <6.0 --<4.0 <10 <2.0 -- 11/16/2018 287 213 629 772 245 <5.0 <5.0 49.8 865 15.1 11.6 9.3 <5.0 <5.0 <5.0 <5.0 <5.0 <5.0 <5.0 <2.0 <2.0 <5.0 <5.0 <2.0 <2.0 7.8 127 <5.0 <2.0 <5.0 14.9 <2.0 <10 <5.0 -- 7/8/2019 <0.50 79.7 326 524 246 <0.50 <0.50 60.1 733 3.0 15.9 13.4 1.5 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 0.95 <0.30 <0.50 <0.50 <0.20 <0.20 11.6 <0.50 <0.50 <0.20 <0.30 <0.20 0.24 3.4 <0.50 -- 1/9/2020 143 83.7 741 720 239 <0.50 <0.50 84.4 1100 11 18.7 14.8 1.6 <0.50 <0.50 2 <0.50 <0.50 <0.50 <0.20 <0.30 <0.50 <0.50 <0.20 <0.20 13.2 160 <0.50 <0.20 <0.30 <0.20 0.47 <0.10 0.91 -- 2/11/2022 70.2 17.8 714 762 165 <10 <10 50 937 7.0 J 11.1 10.8 <10 <10 <10 <10 <10 <10 <10 <4.0 <6.0 <10 <10 <4.0 <4.0 7.4 J 142 <10 <4.0 <6.0 <4.0 <4.0 <10 <200 <10 5/4/2023 547 589 678 606.3 258 5.78 J <20.0 59.7 1,040 19.8 J 17.6 J 14.5 J <20.0 <20.0 <100 <50.0 <20.0 <20.0 <20.0 <20.0 <20.0 <20.0 <20.0 NA NA 11.6 J 172 <20.0 <20.0 <20.0 <20.0 <20.0 NA <50.0 <100 7/16/2015 110 70 29 48 4.9 8.5 <0.18 0.27J 13 4.1 <0.054 0.28J 0.11J <0.088 <0.14 <0.32 <0.07 <0.074 <0.089 <0.19 <0.11 <0.072 <0.13 <0.062 <0.056 0.29J 0.94 <0.12 <0.12 <0.12 ----<1.3 <0.12 -- 2/26/2018 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <0.10 <0.50 <0.20 <0.20 <0.10 <0.10 <0.20 <0.20 <0.10 <0.20 <0.20 <0.20 <0.50 <0.50 <0.50 <0.10 <0.30 --<0.20 <0.50 <0.10 -- 11/16/2018 <0.50 <0.50 <0.50 <0.50 0.58 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <0.20 <0.20 <0.50 <0.50 <0.20 <0.20 <0.50 <0.50 <0.50 <0.20 <0.50 <0.20 <0.20 <0.50 <0.50 -- 7/8/2019 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <0.20 <0.30 <0.50 <0.50 <0.20 <0.20 <0.50 <0.50 <0.50 <0.20 <0.30 <0.20 <0.20 <0.50 <0.50 -- 1/9/2020 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <0.20 <0.30 <0.50 <0.50 <0.20 <0.20 <0.50 <0.50 <0.50 <0.20 <0.30 <0.20 <0.20 <0.10 <0.50 -- 2/11/2022 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <0.20 <0.30 <0.50 <0.50 <0.20 <0.20 <0.50 <0.50 <0.50 <0.20 <0.30 <0.20 <0.20 <0.50 <10 <0.50 5/4/2023 <1.00 <1.00 <1.00 <3.00 <5.00 <1.00 <1.00 <1.00 <1.00 <1.00 <1.00 <1.00 <1.00 <1.00 <5.00 <2.50 <1.00 <1.00 <1.00 <1.00 <1.00 <1.00 <1.00 NA NA <1.00 <1.00 <1.00 <1.00 <1.00 <1.00 <1.00 NA <2.50 <5.00 7/16/2015 57 54 870 1,990 500 <2.2 <4.5 40 800 240 18 7.5J <2.4 <2.2 <3.6 <4 <1.8 <1.8 <2.2 <4.8 <2.8 <1.8 <3.2 <1.6 <1.4 19 65 <3 <3.1 <2.9 ----<34 <3 -- 2/26/2018 <0.50 0.58 31.1 77.3 97.4 <0.50 <0.50 6.2 105 42.1 4.5 3.4 0.59 <0.10 <0.50 <0.20 <0.20 <0.10 <0.10 <0.20 <0.20 <0.10 <0.20 <0.20 <0.20 5.4 13.8 <0.50 <0.10 <0.30 --<0.20 <0.50 <0.10 -- 11/16/2018 <2.5 <2.5 85.7 248 117 <2.5 <2.5 11.5 159 49.1 <2.5 <2.5 <2.5 <2.5 <2.5 <2.5 <2.5 <2.5 <2.5 <1.0 <1.0 <2.5 <2.5 <1.0 <1.0 5.4 18.1 <2.5 <1.0 <2.5 <1.0 <1.0 <2.5 <2.5 -- 7/8/2019 9.2 27.1 600 854 880 <2.5 <2.5 36.9 377 116 <2.5 3.4 <2.5 <2.5 <2.5 <2.5 <2.5 <2.5 <2.5 <1.0 <1.5 <2.5 <2.5 <1.0 <1.0 8.9 54.2 <2.5 <1.0 <1.5 <1.0 <1.0 <2.5 6.2 -- 1/9/2020 0.52 1.1 57.6 89.5 71.2 <0.50 <0.50 7.1 94.4 29 1.8 1.5 0.53 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <0.20 <0.30 <0.50 <0.50 <0.20 <0.20 4.1 10.4 <0.50 <0.20 <0.30 <0.20 0.2 <0.10 1.8 -- 2/11/2022 0.28 J 0.56 37.6 49.7 32.4 <0.50 <0.50 4.3 51.9 19.8 0.99 <0.50 0.31 J <0.50 <0.50 0.40 J <0.50 <0.50 <0.50 <0.20 <0.30 <0.50 <0.50 <0.20 <0.20 3.0 6.8 <0.50 <0.20 <0.30 <0.20 <0.20 <0.50 <10 1.2 5/4/2023 0.174 J 0.513 J 52.3 58.6 70.4 <1.00 <1.00 6.70 74.8 19.7 <1.00 2.16 0.552 J <1.00 <5.00 <2.50 <1.00 <1.00 <1.00 <1.00 <1.00 <1.00 <1.00 NA NA 5.55 10.7 <1.00 <1.00 <1.00 <1.00 <1.00 NA <2.50 <5.00 TW-1 11/16/2018 27 <0.50 9.9 2.5 29.2 <0.50 <0.50 7.6 3 <0.50 1.2 2 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <0.20 <0.20 <0.50 <0.50 <0.20 <0.20 0.59 7.3 <0.50 <0.20 <0.50 <0.20 <0.20 <0.50 <0.50 -- 1 600 600 500 6 20 70 70 400 400 70 70 70 0.6 70 3 100 24 0.02 0.4 0.6 NE NE 0.4 0.4 25 70 70 0.2 0.6 0.3 0.4 88 0.005 400 5,000 260,000 80,000 50,000 6,000 20,000 70,000 30,500 28,500 24,100 5,900 8,800 14,750 NE 70,000 3,000 NE 24,000 50 400 600 NE NE 400 400 11,700 26,100 70,000 200 600 NE 400 88,000 NE 400,000 Notes: 1. "<" = Not detected at or above the laboratory detection limit or reporting limit. 2. Concentrations are reported in micrograms per liter (ug/l) = parts per billion (ppb). 4. GCL = Gross Contamination Level. 5. MTBE = Methyl Tertiary Butyl Ether. 6. J = Estimated value below method reporting limit. 7. NE = Not Established. 8. -- = Not detected or reported during previous sampling events. 9. NA = Not Analyzed. MW-3 MW-2 MW-1 3. Concentrations highlighted and in bold print equal or exceed the April, 2022, 15A NCAC 02L .0202 Groundwater Standard (2L Standard). Well Date 2L GW Standard GCL Method 6200B TABLE 4 NATURAL ATTENUATION DATA REID PROPERTY 6898 GOLDSBORO ROAD WADE, CUMBERLAND COUNTY, NORTH CAROLINA NCDEQ INCIDENT #19658 11/16/2018 16.27 2.36 NA 337 6.17 -37.3 7/8/2019 26.0 1.11 252.5 257.6 5.71 -27.2 1/9/2020 17.3 4.61 363.1 319.5 6.29 -98.7 2/11/2022 5/4/2023 11/16/2018 18.36 2.64 NA 110 5.24 189.3 7/8/2019 30.7 3.86 141.2 156.9 5.01 207.0 1/9/2020 16.0 5.22 192.4 83.8 4.92 34.0 2/11/2022 14.1 3.81 87.0 69.0 4.88 230.8 5/4/2023 16.9 5.45 92.4 78.4 4.79 155.9 11/16/2018 16.88 3.77 NA 48 5.17 120.1 7/8/2019 26.4 1.37 98.7 101.5 5.02 59.0 1/9/2020 17.1 3.59 89.2 76.7 5.98 -131.4 2/11/2022 14.7 4.77 78.2 63.0 5.74 169.6 5/4/2023 17.2 2.68 58.3 49.7 5.46 116.5 Notes: 1. °C = degrees celsius. 2. mg/L = milligram per liter. 3. µS/cm = microsiemens per centimeter. 4. std unit = standard unit. 5. mV = millivolts. 6. NA = Not Analyzed. MW-1 MW-2 MW-3 Heavy sheen and odor - Did not collect dataSpecific Conductivity (µs/cm)ORP (mV)WELL ID Date Collected Temperature (oC)Dissolved Oxygen (mg/L)Conductivity (µs/cm)pH (std unit)Heavy sheen and odor - Did not collect data Reid Property ATC Project No. SLC1965803 NCDEQ State Lead Program FIGURES 2725 E. Millbrook Road, Suite 121 Raleigh, NC 27604 (919) 871-0999 FIGURE 1 SITE TOPOGRAPHIC MAP PROJECT NO: SLP1965803 REVIEWED BY: AW SCALE: 1:24 000 DATE: 8/5/19 REID PROPERTY –INCIDENT #19658 6898 GOLDSBORO ROAD WADE, NORTH CAROLINA Source: 2013 USGS Map Cumberland County, NC, Wade Quadrangle N Site 5 Reid Property ATC Project No. SLC1965803 NCDEQ State Lead Program APPENDIX A FIELD NOTES Reid Property ATC Project No. SLC1965803 NCDEQ State Lead Program APPENDIX B LABORATORY ANALYTICAL REPORT ANALYTICAL REPORT May 15, 2023 ATC Group Services LLC Sample Delivery Group:L1613908 Samples Received:05/09/2023 Project Number:SLC1965803 Description:Reid Property Report To:Brian Buchanan 2725 E. Millbrook Road, Ste 121 Raleigh, NC 27604 Entire Report Reviewed By: May 15, 2023 [Preliminary Report] Heather J Wagner Project Manager Results relate only to the items tested or calibrated and are reported as rounded values. This test report shall not be reproduced, except in full, without written approval of the laboratory. Where applicable, sampling conducted by Pace Analytical National is performed per guidance provided in laboratory standard operating procedures ENV-SOP-MTJL-0067 and ENV-SOP-MTJL-0068. Where sampling conducted by the customer, results relate to the accuracy of the information provided, and as the samples are received. Pace Analytical National 12065 Lebanon Rd Mount Juliet, TN 37122 615-758-5858 800-767-5859 www.pacenational.com 1 Cp 2Tc 3Ss 4Cn 5Sr 6Qc 7Gl 8Al 9Sc ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE: ATC Group Services LLC SLC1965803 L1613908 05/15/23 14:49 1 of 19 May 15, 2023 Heather J Wagner Project Manager ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE: ATC Group Services LLC SLC1965803 L1613908 05/15/23 16:49 1 of 19 TABLE OF CONTENTS Cp: Cover Page 1 Tc: Table of Contents 2 Ss: Sample Summary 3 Cn: Case Narrative 4 Sr: Sample Results 5 MW-1 L1613908-01 5 MW-2 L1613908-02 7 MW-3 L1613908-03 9 FB-1 L1613908-04 11 Qc: Quality Control Summary 13 Volatile Organic Compounds (GC/MS) by Method 6200B-2011 13 Gl: Glossary of Terms 17 Al: Accreditations & Locations 18 Sc: Sample Chain of Custody 19 1 Cp 2Tc 3Ss 4Cn 5Sr 6Qc 7Gl 8Al 9Sc ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE: ATC Group Services LLC SLC1965803 L1613908 05/15/23 14:49 2 of 19 ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE: ATC Group Services LLC SLC1965803 L1613908 05/15/23 16:49 2 of 19 SAMPLE SUMMARY Collected by Collected date/time Received date/time MW-1 L1613908-01 GW Garrett Lewis 05/04/23 09:45 05/09/23 09:30 Method Batch Dilution Preparation Analysis Analyst Location date/time date/time Volatile Organic Compounds (GC/MS) by Method 6200B-2011 WG2059817 20 05/15/23 05:16 05/15/23 05:16 JHH Mt. Juliet, TN Collected by Collected date/time Received date/time MW-2 L1613908-02 GW Garrett Lewis 05/04/23 10:15 05/09/23 09:30 Method Batch Dilution Preparation Analysis Analyst Location date/time date/time Volatile Organic Compounds (GC/MS) by Method 6200B-2011 WG2059817 1 05/15/23 03:04 05/15/23 03:04 JHH Mt. Juliet, TN Collected by Collected date/time Received date/time MW-3 L1613908-03 GW Garrett Lewis 05/04/23 10:45 05/09/23 09:30 Method Batch Dilution Preparation Analysis Analyst Location date/time date/time Volatile Organic Compounds (GC/MS) by Method 6200B-2011 WG2059817 1 05/15/23 03:22 05/15/23 03:22 JHH Mt. Juliet, TN Collected by Collected date/time Received date/time FB-1 L1613908-04 GW Garrett Lewis 05/04/23 11:00 05/09/23 09:30 Method Batch Dilution Preparation Analysis Analyst Location date/time date/time Volatile Organic Compounds (GC/MS) by Method 6200B-2011 WG2059817 1 05/14/23 23:54 05/14/23 23:54 JHH Mt. Juliet, TN 1 Cp 2Tc 3Ss 4Cn 5Sr 6Qc 7Gl 8Al 9Sc ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE: ATC Group Services LLC SLC1965803 L1613908 05/15/23 14:49 3 of 19 ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE: ATC Group Services LLC SLC1965803 L1613908 05/15/23 16:49 3 of 19 CASE NARRATIVE All sample aliquots were received at the correct temperature, in the proper containers, with the appropriate preservatives, and within method specified holding times, unless qualified or notated within the report. Where applicable, all MDL (LOD) and RDL (LOQ) values reported for environmental samples have been corrected for the dilution factor used in the analysis. All Method and Batch Quality Control are within established criteria except where addressed in this case narrative, a non-conformance form or properly qualified within the sample results. By my digital signature below, I affirm to the best of my knowledge, all problems/anomalies observed by the laboratory as having the potential to affect the quality of the data have been identified by the laboratory, and no information or data have been knowingly withheld that would affect the quality of the data. [Preliminary Report] Heather J Wagner Project Manager 1 Cp 2Tc 3Ss 4Cn 5Sr 6Qc 7Gl 8Al 9Sc ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE: ATC Group Services LLC SLC1965803 L1613908 05/15/23 14:49 4 of 19 Heather J Wagner Project Manager ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE: ATC Group Services LLC SLC1965803 L1613908 05/15/23 16:49 4 of 19 SAMPLE RESULTS - 01 L1613908 MW-1 Collected date/time: 05/04/23 09:45 Volatile Organic Compounds (GC/MS) by Method 6200B-2011 Result Qualifier MDL RDL Dilution Analysis Batch Analyte ug/l ug/l ug/l date / time Acetone U 226 1000 20 05/15/2023 05:16 WG2059817 Acrolein U 50.8 1000 20 05/15/2023 05:16 WG2059817 Acrylonitrile U 13.4 200 20 05/15/2023 05:16 WG2059817 Benzene 547 1.88 20.0 20 05/15/2023 05:16 WG2059817 Bromobenzene U 2.36 20.0 20 05/15/2023 05:16 WG2059817 Bromodichloromethane U 2.72 20.0 20 05/15/2023 05:16 WG2059817 Bromoform U 2.58 20.0 20 05/15/2023 05:16 WG2059817 Bromomethane U 12.1 100 20 05/15/2023 05:16 WG2059817 n-Butylbenzene 17.6 J 3.14 20.0 20 05/15/2023 05:16 WG2059817 sec-Butylbenzene 14.5 J 2.50 20.0 20 05/15/2023 05:16 WG2059817 tert-Butylbenzene U 2.54 20.0 20 05/15/2023 05:16 WG2059817 Carbon tetrachloride U 2.56 20.0 20 05/15/2023 05:16 WG2059817 Chlorobenzene U 2.32 20.0 20 05/15/2023 05:16 WG2059817 Chlorodibromomethane U 2.80 20.0 20 05/15/2023 05:16 WG2059817 Chloroethane U 3.84 100 20 05/15/2023 05:16 WG2059817 Chloroform U 2.22 100 20 05/15/2023 05:16 WG2059817 Chloromethane U 19.2 50.0 20 05/15/2023 05:16 WG2059817 2-Chlorotoluene U 2.12 20.0 20 05/15/2023 05:16 WG2059817 4-Chlorotoluene U 2.28 20.0 20 05/15/2023 05:16 WG2059817 1,2-Dibromo-3-Chloropropane U 5.52 100 20 05/15/2023 05:16 WG2059817 1,2-Dibromoethane U 2.52 20.0 20 05/15/2023 05:16 WG2059817 Dibromomethane U 2.44 20.0 20 05/15/2023 05:16 WG2059817 1,2-Dichlorobenzene U 2.14 20.0 20 05/15/2023 05:16 WG2059817 1,3-Dichlorobenzene U 2.20 20.0 20 05/15/2023 05:16 WG2059817 1,4-Dichlorobenzene U 2.40 20.0 20 05/15/2023 05:16 WG2059817 Dichlorodifluoromethane U 7.48 100 20 05/15/2023 05:16 WG2059817 1,1-Dichloroethane U 2.00 20.0 20 05/15/2023 05:16 WG2059817 1,2-Dichloroethane U 1.64 20.0 20 05/15/2023 05:16 WG2059817 1,1-Dichloroethene U 3.76 20.0 20 05/15/2023 05:16 WG2059817 cis-1,2-Dichloroethene U 2.52 20.0 20 05/15/2023 05:16 WG2059817 trans-1,2-Dichloroethene U 2.98 20.0 20 05/15/2023 05:16 WG2059817 1,2-Dichloropropane U 2.98 20.0 20 05/15/2023 05:16 WG2059817 1,1-Dichloropropene U 2.84 20.0 20 05/15/2023 05:16 WG2059817 1,3-Dichloropropane U 2.20 20.0 20 05/15/2023 05:16 WG2059817 2,2-Dichloropropane U J3 3.22 20.0 20 05/15/2023 05:16 WG2059817 Di-isopropyl ether U 2.10 20.0 20 05/15/2023 05:16 WG2059817 Ethylbenzene 678 2.74 20.0 20 05/15/2023 05:16 WG2059817 Hexachloro-1,3-butadiene U 6.74 20.0 20 05/15/2023 05:16 WG2059817 Isopropylbenzene 59.7 2.10 20.0 20 05/15/2023 05:16 WG2059817 p-Isopropyltoluene 11.6 J 2.40 20.0 20 05/15/2023 05:16 WG2059817 2-Butanone (MEK)U 23.8 200 20 05/15/2023 05:16 WG2059817 Methylene Chloride U 8.60 100 20 05/15/2023 05:16 WG2059817 4-Methyl-2-pentanone (MIBK)U 9.56 200 20 05/15/2023 05:16 WG2059817 Methyl tert-butyl ether 5.78 J 2.02 20.0 20 05/15/2023 05:16 WG2059817 Naphthalene 258 20.0 100 20 05/15/2023 05:16 WG2059817 n-Propylbenzene 172 1.99 20.0 20 05/15/2023 05:16 WG2059817 Styrene U 2.36 20.0 20 05/15/2023 05:16 WG2059817 1,1,1,2-Tetrachloroethane U 2.94 20.0 20 05/15/2023 05:16 WG2059817 1,1,2,2-Tetrachloroethane U J3 2.66 20.0 20 05/15/2023 05:16 WG2059817 Tetrachloroethene U 6.00 20.0 20 05/15/2023 05:16 WG2059817 Toluene 589 5.56 20.0 20 05/15/2023 05:16 WG2059817 1,2,3-Trichlorobenzene U 4.60 20.0 20 05/15/2023 05:16 WG2059817 1,2,4-Trichlorobenzene U 9.62 20.0 20 05/15/2023 05:16 WG2059817 1,1,1-Trichloroethane U 2.98 20.0 20 05/15/2023 05:16 WG2059817 1,1,2-Trichloroethane U 3.16 20.0 20 05/15/2023 05:16 WG2059817 Trichloroethene U 3.80 20.0 20 05/15/2023 05:16 WG2059817 1 Cp 2Tc 3Ss 4Cn 5Sr 6Qc 7Gl 8Al 9Sc ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE: ATC Group Services LLC SLC1965803 L1613908 05/15/23 14:49 5 of 19 ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE: ATC Group Services LLC SLC1965803 L1613908 05/15/23 16:49 5 of 19 SAMPLE RESULTS - 01 L1613908 MW-1 Collected date/time: 05/04/23 09:45 Volatile Organic Compounds (GC/MS) by Method 6200B-2011 Result Qualifier MDL RDL Dilution Analysis Batch Analyte ug/l ug/l ug/l date / time Trichlorofluoromethane U 3.20 100 20 05/15/2023 05:16 WG2059817 1,2,3-Trichloropropane U 4.74 50.0 20 05/15/2023 05:16 WG2059817 1,2,4-Trimethylbenzene 1040 6.44 20.0 20 05/15/2023 05:16 WG2059817 1,3,5-Trimethylbenzene 19.8 J 2.08 20.0 20 05/15/2023 05:16 WG2059817 Vinyl chloride U 4.68 20.0 20 05/15/2023 05:16 WG2059817 o-Xylene 81.3 3.48 20.0 20 05/15/2023 05:16 WG2059817 m&p-Xylenes 525 8.60 40.0 20 05/15/2023 05:16 WG2059817 (S) Toluene-d8 107 80.0-120 05/15/2023 05:16 WG2059817 (S) 4-Bromofluorobenzene 101 77.0-126 05/15/2023 05:16 WG2059817 (S) 1,2-Dichloroethane-d4 101 70.0-130 05/15/2023 05:16 WG2059817 1 Cp 2Tc 3Ss 4Cn 5Sr 6Qc 7Gl 8Al 9Sc ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE: ATC Group Services LLC SLC1965803 L1613908 05/15/23 14:49 6 of 19 ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE: ATC Group Services LLC SLC1965803 L1613908 05/15/23 16:49 6 of 19 SAMPLE RESULTS - 02 L1613908 MW-2 Collected date/time: 05/04/23 10:15 Volatile Organic Compounds (GC/MS) by Method 6200B-2011 Result Qualifier MDL RDL Dilution Analysis Batch Analyte ug/l ug/l ug/l date / time Acetone U 11.3 50.0 1 05/15/2023 03:04 WG2059817 Acrolein U 2.54 50.0 1 05/15/2023 03:04 WG2059817 Acrylonitrile U 0.671 10.0 1 05/15/2023 03:04 WG2059817 Benzene U 0.0941 1.00 1 05/15/2023 03:04 WG2059817 Bromobenzene U 0.118 1.00 1 05/15/2023 03:04 WG2059817 Bromodichloromethane U 0.136 1.00 1 05/15/2023 03:04 WG2059817 Bromoform U 0.129 1.00 1 05/15/2023 03:04 WG2059817 Bromomethane U 0.605 5.00 1 05/15/2023 03:04 WG2059817 n-Butylbenzene U 0.157 1.00 1 05/15/2023 03:04 WG2059817 sec-Butylbenzene U 0.125 1.00 1 05/15/2023 03:04 WG2059817 tert-Butylbenzene U 0.127 1.00 1 05/15/2023 03:04 WG2059817 Carbon tetrachloride U 0.128 1.00 1 05/15/2023 03:04 WG2059817 Chlorobenzene U 0.116 1.00 1 05/15/2023 03:04 WG2059817 Chlorodibromomethane U 0.140 1.00 1 05/15/2023 03:04 WG2059817 Chloroethane U 0.192 5.00 1 05/15/2023 03:04 WG2059817 Chloroform U 0.111 5.00 1 05/15/2023 03:04 WG2059817 Chloromethane U 0.960 2.50 1 05/15/2023 03:04 WG2059817 2-Chlorotoluene U 0.106 1.00 1 05/15/2023 03:04 WG2059817 4-Chlorotoluene U 0.114 1.00 1 05/15/2023 03:04 WG2059817 1,2-Dibromo-3-Chloropropane U 0.276 5.00 1 05/15/2023 03:04 WG2059817 1,2-Dibromoethane U 0.126 1.00 1 05/15/2023 03:04 WG2059817 Dibromomethane U 0.122 1.00 1 05/15/2023 03:04 WG2059817 1,2-Dichlorobenzene U 0.107 1.00 1 05/15/2023 03:04 WG2059817 1,3-Dichlorobenzene U 0.110 1.00 1 05/15/2023 03:04 WG2059817 1,4-Dichlorobenzene U 0.120 1.00 1 05/15/2023 03:04 WG2059817 Dichlorodifluoromethane U 0.374 5.00 1 05/15/2023 03:04 WG2059817 1,1-Dichloroethane U 0.100 1.00 1 05/15/2023 03:04 WG2059817 1,2-Dichloroethane U 0.0819 1.00 1 05/15/2023 03:04 WG2059817 1,1-Dichloroethene U 0.188 1.00 1 05/15/2023 03:04 WG2059817 cis-1,2-Dichloroethene U 0.126 1.00 1 05/15/2023 03:04 WG2059817 trans-1,2-Dichloroethene U 0.149 1.00 1 05/15/2023 03:04 WG2059817 1,2-Dichloropropane U 0.149 1.00 1 05/15/2023 03:04 WG2059817 1,1-Dichloropropene U 0.142 1.00 1 05/15/2023 03:04 WG2059817 1,3-Dichloropropane U 0.110 1.00 1 05/15/2023 03:04 WG2059817 2,2-Dichloropropane U J3 0.161 1.00 1 05/15/2023 03:04 WG2059817 Di-isopropyl ether U 0.105 1.00 1 05/15/2023 03:04 WG2059817 Ethylbenzene U 0.137 1.00 1 05/15/2023 03:04 WG2059817 Hexachloro-1,3-butadiene U 0.337 1.00 1 05/15/2023 03:04 WG2059817 Isopropylbenzene U 0.105 1.00 1 05/15/2023 03:04 WG2059817 p-Isopropyltoluene U 0.120 1.00 1 05/15/2023 03:04 WG2059817 2-Butanone (MEK)U 1.19 10.0 1 05/15/2023 03:04 WG2059817 Methylene Chloride U 0.430 5.00 1 05/15/2023 03:04 WG2059817 4-Methyl-2-pentanone (MIBK)U 0.478 10.0 1 05/15/2023 03:04 WG2059817 Methyl tert-butyl ether U 0.101 1.00 1 05/15/2023 03:04 WG2059817 Naphthalene U 1.00 5.00 1 05/15/2023 03:04 WG2059817 n-Propylbenzene U 0.0993 1.00 1 05/15/2023 03:04 WG2059817 Styrene U 0.118 1.00 1 05/15/2023 03:04 WG2059817 1,1,1,2-Tetrachloroethane U 0.147 1.00 1 05/15/2023 03:04 WG2059817 1,1,2,2-Tetrachloroethane U J3 0.133 1.00 1 05/15/2023 03:04 WG2059817 Tetrachloroethene U 0.300 1.00 1 05/15/2023 03:04 WG2059817 Toluene U 0.278 1.00 1 05/15/2023 03:04 WG2059817 1,2,3-Trichlorobenzene U 0.230 1.00 1 05/15/2023 03:04 WG2059817 1,2,4-Trichlorobenzene U 0.481 1.00 1 05/15/2023 03:04 WG2059817 1,1,1-Trichloroethane U 0.149 1.00 1 05/15/2023 03:04 WG2059817 1,1,2-Trichloroethane U 0.158 1.00 1 05/15/2023 03:04 WG2059817 Trichloroethene U 0.190 1.00 1 05/15/2023 03:04 WG2059817 1 Cp 2Tc 3Ss 4Cn 5Sr 6Qc 7Gl 8Al 9Sc ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE: ATC Group Services LLC SLC1965803 L1613908 05/15/23 14:49 7 of 19 ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE: ATC Group Services LLC SLC1965803 L1613908 05/15/23 16:49 7 of 19 SAMPLE RESULTS - 02 L1613908 MW-2 Collected date/time: 05/04/23 10:15 Volatile Organic Compounds (GC/MS) by Method 6200B-2011 Result Qualifier MDL RDL Dilution Analysis Batch Analyte ug/l ug/l ug/l date / time Trichlorofluoromethane U 0.160 5.00 1 05/15/2023 03:04 WG2059817 1,2,3-Trichloropropane U 0.237 2.50 1 05/15/2023 03:04 WG2059817 1,2,4-Trimethylbenzene U 0.322 1.00 1 05/15/2023 03:04 WG2059817 1,3,5-Trimethylbenzene U 0.104 1.00 1 05/15/2023 03:04 WG2059817 Vinyl chloride U 0.234 1.00 1 05/15/2023 03:04 WG2059817 o-Xylene U 0.174 1.00 1 05/15/2023 03:04 WG2059817 m&p-Xylenes U 0.430 2.00 1 05/15/2023 03:04 WG2059817 (S) Toluene-d8 106 80.0-120 05/15/2023 03:04 WG2059817 (S) 4-Bromofluorobenzene 99.3 77.0-126 05/15/2023 03:04 WG2059817 (S) 1,2-Dichloroethane-d4 102 70.0-130 05/15/2023 03:04 WG2059817 1 Cp 2Tc 3Ss 4Cn 5Sr 6Qc 7Gl 8Al 9Sc ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE: ATC Group Services LLC SLC1965803 L1613908 05/15/23 14:49 8 of 19 ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE: ATC Group Services LLC SLC1965803 L1613908 05/15/23 16:49 8 of 19 SAMPLE RESULTS - 03 L1613908 MW-3 Collected date/time: 05/04/23 10:45 Volatile Organic Compounds (GC/MS) by Method 6200B-2011 Result Qualifier MDL RDL Dilution Analysis Batch Analyte ug/l ug/l ug/l date / time Acetone U 11.3 50.0 1 05/15/2023 03:22 WG2059817 Acrolein U 2.54 50.0 1 05/15/2023 03:22 WG2059817 Acrylonitrile U 0.671 10.0 1 05/15/2023 03:22 WG2059817 Benzene 0.174 J 0.0941 1.00 1 05/15/2023 03:22 WG2059817 Bromobenzene U 0.118 1.00 1 05/15/2023 03:22 WG2059817 Bromodichloromethane U 0.136 1.00 1 05/15/2023 03:22 WG2059817 Bromoform U 0.129 1.00 1 05/15/2023 03:22 WG2059817 Bromomethane U 0.605 5.00 1 05/15/2023 03:22 WG2059817 n-Butylbenzene U 0.157 1.00 1 05/15/2023 03:22 WG2059817 sec-Butylbenzene 2.16 0.125 1.00 1 05/15/2023 03:22 WG2059817 tert-Butylbenzene 0.552 J 0.127 1.00 1 05/15/2023 03:22 WG2059817 Carbon tetrachloride U 0.128 1.00 1 05/15/2023 03:22 WG2059817 Chlorobenzene U 0.116 1.00 1 05/15/2023 03:22 WG2059817 Chlorodibromomethane U 0.140 1.00 1 05/15/2023 03:22 WG2059817 Chloroethane U 0.192 5.00 1 05/15/2023 03:22 WG2059817 Chloroform U 0.111 5.00 1 05/15/2023 03:22 WG2059817 Chloromethane U 0.960 2.50 1 05/15/2023 03:22 WG2059817 2-Chlorotoluene U 0.106 1.00 1 05/15/2023 03:22 WG2059817 4-Chlorotoluene U 0.114 1.00 1 05/15/2023 03:22 WG2059817 1,2-Dibromo-3-Chloropropane U 0.276 5.00 1 05/15/2023 03:22 WG2059817 1,2-Dibromoethane U 0.126 1.00 1 05/15/2023 03:22 WG2059817 Dibromomethane U 0.122 1.00 1 05/15/2023 03:22 WG2059817 1,2-Dichlorobenzene U 0.107 1.00 1 05/15/2023 03:22 WG2059817 1,3-Dichlorobenzene U 0.110 1.00 1 05/15/2023 03:22 WG2059817 1,4-Dichlorobenzene U 0.120 1.00 1 05/15/2023 03:22 WG2059817 Dichlorodifluoromethane U 0.374 5.00 1 05/15/2023 03:22 WG2059817 1,1-Dichloroethane U 0.100 1.00 1 05/15/2023 03:22 WG2059817 1,2-Dichloroethane U 0.0819 1.00 1 05/15/2023 03:22 WG2059817 1,1-Dichloroethene U 0.188 1.00 1 05/15/2023 03:22 WG2059817 cis-1,2-Dichloroethene U 0.126 1.00 1 05/15/2023 03:22 WG2059817 trans-1,2-Dichloroethene U 0.149 1.00 1 05/15/2023 03:22 WG2059817 1,2-Dichloropropane U 0.149 1.00 1 05/15/2023 03:22 WG2059817 1,1-Dichloropropene U 0.142 1.00 1 05/15/2023 03:22 WG2059817 1,3-Dichloropropane U 0.110 1.00 1 05/15/2023 03:22 WG2059817 2,2-Dichloropropane U J3 0.161 1.00 1 05/15/2023 03:22 WG2059817 Di-isopropyl ether U 0.105 1.00 1 05/15/2023 03:22 WG2059817 Ethylbenzene 52.3 0.137 1.00 1 05/15/2023 03:22 WG2059817 Hexachloro-1,3-butadiene U 0.337 1.00 1 05/15/2023 03:22 WG2059817 Isopropylbenzene 6.70 0.105 1.00 1 05/15/2023 03:22 WG2059817 p-Isopropyltoluene 5.55 0.120 1.00 1 05/15/2023 03:22 WG2059817 2-Butanone (MEK)U 1.19 10.0 1 05/15/2023 03:22 WG2059817 Methylene Chloride U 0.430 5.00 1 05/15/2023 03:22 WG2059817 4-Methyl-2-pentanone (MIBK)U 0.478 10.0 1 05/15/2023 03:22 WG2059817 Methyl tert-butyl ether U 0.101 1.00 1 05/15/2023 03:22 WG2059817 Naphthalene 70.4 1.00 5.00 1 05/15/2023 03:22 WG2059817 n-Propylbenzene 10.7 0.0993 1.00 1 05/15/2023 03:22 WG2059817 Styrene U 0.118 1.00 1 05/15/2023 03:22 WG2059817 1,1,1,2-Tetrachloroethane U 0.147 1.00 1 05/15/2023 03:22 WG2059817 1,1,2,2-Tetrachloroethane U J3 0.133 1.00 1 05/15/2023 03:22 WG2059817 Tetrachloroethene U 0.300 1.00 1 05/15/2023 03:22 WG2059817 Toluene 0.513 J 0.278 1.00 1 05/15/2023 03:22 WG2059817 1,2,3-Trichlorobenzene U 0.230 1.00 1 05/15/2023 03:22 WG2059817 1,2,4-Trichlorobenzene U 0.481 1.00 1 05/15/2023 03:22 WG2059817 1,1,1-Trichloroethane U 0.149 1.00 1 05/15/2023 03:22 WG2059817 1,1,2-Trichloroethane U 0.158 1.00 1 05/15/2023 03:22 WG2059817 Trichloroethene U 0.190 1.00 1 05/15/2023 03:22 WG2059817 1 Cp 2Tc 3Ss 4Cn 5Sr 6Qc 7Gl 8Al 9Sc ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE: ATC Group Services LLC SLC1965803 L1613908 05/15/23 14:49 9 of 19 ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE: ATC Group Services LLC SLC1965803 L1613908 05/15/23 16:49 9 of 19 SAMPLE RESULTS - 03 L1613908 MW-3 Collected date/time: 05/04/23 10:45 Volatile Organic Compounds (GC/MS) by Method 6200B-2011 Result Qualifier MDL RDL Dilution Analysis Batch Analyte ug/l ug/l ug/l date / time Trichlorofluoromethane U 0.160 5.00 1 05/15/2023 03:22 WG2059817 1,2,3-Trichloropropane U 0.237 2.50 1 05/15/2023 03:22 WG2059817 1,2,4-Trimethylbenzene 74.8 0.322 1.00 1 05/15/2023 03:22 WG2059817 1,3,5-Trimethylbenzene 19.7 0.104 1.00 1 05/15/2023 03:22 WG2059817 Vinyl chloride U 0.234 1.00 1 05/15/2023 03:22 WG2059817 o-Xylene 10.7 0.174 1.00 1 05/15/2023 03:22 WG2059817 m&p-Xylenes 47.9 0.430 2.00 1 05/15/2023 03:22 WG2059817 (S) Toluene-d8 103 80.0-120 05/15/2023 03:22 WG2059817 (S) 4-Bromofluorobenzene 109 77.0-126 05/15/2023 03:22 WG2059817 (S) 1,2-Dichloroethane-d4 101 70.0-130 05/15/2023 03:22 WG2059817 1 Cp 2Tc 3Ss 4Cn 5Sr 6Qc 7Gl 8Al 9Sc ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE: ATC Group Services LLC SLC1965803 L1613908 05/15/23 14:49 10 of 19 ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE: ATC Group Services LLC SLC1965803 L1613908 05/15/23 16:49 10 of 19 SAMPLE RESULTS - 04 L1613908 FB-1 Collected date/time: 05/04/23 11:00 Volatile Organic Compounds (GC/MS) by Method 6200B-2011 Result Qualifier MDL RDL Dilution Analysis Batch Analyte ug/l ug/l ug/l date / time Acetone 15.6 J 11.3 50.0 1 05/14/2023 23:54 WG2059817 Acrolein U 2.54 50.0 1 05/14/2023 23:54 WG2059817 Acrylonitrile U 0.671 10.0 1 05/14/2023 23:54 WG2059817 Benzene U 0.0941 1.00 1 05/14/2023 23:54 WG2059817 Bromobenzene U 0.118 1.00 1 05/14/2023 23:54 WG2059817 Bromodichloromethane U 0.136 1.00 1 05/14/2023 23:54 WG2059817 Bromoform U 0.129 1.00 1 05/14/2023 23:54 WG2059817 Bromomethane U 0.605 5.00 1 05/14/2023 23:54 WG2059817 n-Butylbenzene U 0.157 1.00 1 05/14/2023 23:54 WG2059817 sec-Butylbenzene U 0.125 1.00 1 05/14/2023 23:54 WG2059817 tert-Butylbenzene U 0.127 1.00 1 05/14/2023 23:54 WG2059817 Carbon tetrachloride U 0.128 1.00 1 05/14/2023 23:54 WG2059817 Chlorobenzene U 0.116 1.00 1 05/14/2023 23:54 WG2059817 Chlorodibromomethane U 0.140 1.00 1 05/14/2023 23:54 WG2059817 Chloroethane U 0.192 5.00 1 05/14/2023 23:54 WG2059817 Chloroform U 0.111 5.00 1 05/14/2023 23:54 WG2059817 Chloromethane U 0.960 2.50 1 05/14/2023 23:54 WG2059817 2-Chlorotoluene U 0.106 1.00 1 05/14/2023 23:54 WG2059817 4-Chlorotoluene U 0.114 1.00 1 05/14/2023 23:54 WG2059817 1,2-Dibromo-3-Chloropropane U 0.276 5.00 1 05/14/2023 23:54 WG2059817 1,2-Dibromoethane U 0.126 1.00 1 05/14/2023 23:54 WG2059817 Dibromomethane U 0.122 1.00 1 05/14/2023 23:54 WG2059817 1,2-Dichlorobenzene U 0.107 1.00 1 05/14/2023 23:54 WG2059817 1,3-Dichlorobenzene U 0.110 1.00 1 05/14/2023 23:54 WG2059817 1,4-Dichlorobenzene U 0.120 1.00 1 05/14/2023 23:54 WG2059817 Dichlorodifluoromethane U 0.374 5.00 1 05/14/2023 23:54 WG2059817 1,1-Dichloroethane U 0.100 1.00 1 05/14/2023 23:54 WG2059817 1,2-Dichloroethane U 0.0819 1.00 1 05/14/2023 23:54 WG2059817 1,1-Dichloroethene U 0.188 1.00 1 05/14/2023 23:54 WG2059817 cis-1,2-Dichloroethene U 0.126 1.00 1 05/14/2023 23:54 WG2059817 trans-1,2-Dichloroethene U 0.149 1.00 1 05/14/2023 23:54 WG2059817 1,2-Dichloropropane U 0.149 1.00 1 05/14/2023 23:54 WG2059817 1,1-Dichloropropene U 0.142 1.00 1 05/14/2023 23:54 WG2059817 1,3-Dichloropropane U 0.110 1.00 1 05/14/2023 23:54 WG2059817 2,2-Dichloropropane U J3 0.161 1.00 1 05/14/2023 23:54 WG2059817 Di-isopropyl ether U 0.105 1.00 1 05/14/2023 23:54 WG2059817 Ethylbenzene U 0.137 1.00 1 05/14/2023 23:54 WG2059817 Hexachloro-1,3-butadiene U 0.337 1.00 1 05/14/2023 23:54 WG2059817 Isopropylbenzene U 0.105 1.00 1 05/14/2023 23:54 WG2059817 p-Isopropyltoluene U 0.120 1.00 1 05/14/2023 23:54 WG2059817 2-Butanone (MEK)2.75 J 1.19 10.0 1 05/14/2023 23:54 WG2059817 Methylene Chloride 0.696 J 0.430 5.00 1 05/14/2023 23:54 WG2059817 4-Methyl-2-pentanone (MIBK)U 0.478 10.0 1 05/14/2023 23:54 WG2059817 Methyl tert-butyl ether U 0.101 1.00 1 05/14/2023 23:54 WG2059817 Naphthalene U 1.00 5.00 1 05/14/2023 23:54 WG2059817 n-Propylbenzene U 0.0993 1.00 1 05/14/2023 23:54 WG2059817 Styrene U 0.118 1.00 1 05/14/2023 23:54 WG2059817 1,1,1,2-Tetrachloroethane U 0.147 1.00 1 05/14/2023 23:54 WG2059817 1,1,2,2-Tetrachloroethane U J3 0.133 1.00 1 05/14/2023 23:54 WG2059817 Tetrachloroethene U 0.300 1.00 1 05/14/2023 23:54 WG2059817 Toluene U 0.278 1.00 1 05/14/2023 23:54 WG2059817 1,2,3-Trichlorobenzene U 0.230 1.00 1 05/14/2023 23:54 WG2059817 1,2,4-Trichlorobenzene U 0.481 1.00 1 05/14/2023 23:54 WG2059817 1,1,1-Trichloroethane U 0.149 1.00 1 05/14/2023 23:54 WG2059817 1,1,2-Trichloroethane U 0.158 1.00 1 05/14/2023 23:54 WG2059817 Trichloroethene U 0.190 1.00 1 05/14/2023 23:54 WG2059817 1 Cp 2Tc 3Ss 4Cn 5Sr 6Qc 7Gl 8Al 9Sc ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE: ATC Group Services LLC SLC1965803 L1613908 05/15/23 14:49 11 of 19 ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE: ATC Group Services LLC SLC1965803 L1613908 05/15/23 16:49 11 of 19 SAMPLE RESULTS - 04 L1613908 FB-1 Collected date/time: 05/04/23 11:00 Volatile Organic Compounds (GC/MS) by Method 6200B-2011 Result Qualifier MDL RDL Dilution Analysis Batch Analyte ug/l ug/l ug/l date / time Trichlorofluoromethane U 0.160 5.00 1 05/14/2023 23:54 WG2059817 1,2,3-Trichloropropane U 0.237 2.50 1 05/14/2023 23:54 WG2059817 1,2,4-Trimethylbenzene U 0.322 1.00 1 05/14/2023 23:54 WG2059817 1,3,5-Trimethylbenzene U 0.104 1.00 1 05/14/2023 23:54 WG2059817 Vinyl chloride U 0.234 1.00 1 05/14/2023 23:54 WG2059817 o-Xylene U 0.174 1.00 1 05/14/2023 23:54 WG2059817 m&p-Xylenes U 0.430 2.00 1 05/14/2023 23:54 WG2059817 (S) Toluene-d8 108 80.0-120 05/14/2023 23:54 WG2059817 (S) 4-Bromofluorobenzene 102 77.0-126 05/14/2023 23:54 WG2059817 (S) 1,2-Dichloroethane-d4 103 70.0-130 05/14/2023 23:54 WG2059817 1 Cp 2Tc 3Ss 4Cn 5Sr 6Qc 7Gl 8Al 9Sc ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE: ATC Group Services LLC SLC1965803 L1613908 05/15/23 14:49 12 of 19 ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE: ATC Group Services LLC SLC1965803 L1613908 05/15/23 16:49 12 of 19 QUALITY CONTROL SUMMARYWG2059817 Volatile Organic Compounds (GC/MS) by Method 6200B-2011 L1613908-01,02,03,04 Method Blank (MB) (MB) R3924922-3 05/14/23 22:42 MB Result MB Qualifier MB MDL MB RDL Analyte ug/l ug/l ug/l Acetone U 11.3 50.0 Acrolein U 2.54 50.0 Acrylonitrile U 0.671 10.0 Benzene U 0.0941 1.00 Bromobenzene U 0.118 1.00 Bromodichloromethane U 0.136 1.00 Bromoform U 0.129 1.00 Bromomethane U 0.605 5.00 n-Butylbenzene U 0.157 1.00 sec-Butylbenzene U 0.125 1.00 tert-Butylbenzene U 0.127 1.00 Carbon tetrachloride U 0.128 1.00 Chlorobenzene U 0.116 1.00 Chlorodibromomethane U 0.140 1.00 Chloroethane U 0.192 5.00 Chloroform U 0.111 5.00 Chloromethane U 0.960 2.50 2-Chlorotoluene U 0.106 1.00 4-Chlorotoluene U 0.114 1.00 1,2-Dibromo-3-Chloropropane U 0.276 5.00 1,2-Dibromoethane U 0.126 1.00 Dibromomethane U 0.122 1.00 1,2-Dichlorobenzene U 0.107 1.00 1,3-Dichlorobenzene U 0.110 1.00 1,4-Dichlorobenzene U 0.120 1.00 Dichlorodifluoromethane U 0.374 5.00 1,1-Dichloroethane U 0.100 1.00 1,2-Dichloroethane U 0.0819 1.00 1,1-Dichloroethene U 0.188 1.00 cis-1,2-Dichloroethene U 0.126 1.00 trans-1,2-Dichloroethene U 0.149 1.00 1,2-Dichloropropane U 0.149 1.00 1,1-Dichloropropene U 0.142 1.00 1,3-Dichloropropane U 0.110 1.00 2,2-Dichloropropane U 0.161 1.00 Di-isopropyl ether U 0.105 1.00 Ethylbenzene U 0.137 1.00 Hexachloro-1,3-butadiene U 0.337 1.00 Isopropylbenzene U 0.105 1.00 p-Isopropyltoluene U 0.120 1.00 1 Cp 2Tc 3Ss 4Cn 5Sr 6Qc 7Gl 8Al 9Sc ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE: ATC Group Services LLC SLC1965803 L1613908 05/15/23 14:49 13 of 19 ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE: ATC Group Services LLC SLC1965803 L1613908 05/15/23 16:49 13 of 19 QUALITY CONTROL SUMMARYWG2059817 Volatile Organic Compounds (GC/MS) by Method 6200B-2011 L1613908-01,02,03,04 Method Blank (MB) (MB) R3924922-3 05/14/23 22:42 MB Result MB Qualifier MB MDL MB RDL Analyte ug/l ug/l ug/l 2-Butanone (MEK)U 1.19 10.0 Methylene Chloride U 0.430 5.00 4-Methyl-2-pentanone (MIBK)U 0.478 10.0 Methyl tert-butyl ether U 0.101 1.00 Naphthalene U 1.00 5.00 n-Propylbenzene U 0.0993 1.00 Styrene U 0.118 1.00 1,1,1,2-Tetrachloroethane U 0.147 1.00 1,1,2,2-Tetrachloroethane U 0.133 1.00 Tetrachloroethene U 0.300 1.00 Toluene U 0.278 1.00 1,2,3-Trichlorobenzene U 0.230 1.00 1,2,4-Trichlorobenzene U 0.481 1.00 1,1,1-Trichloroethane U 0.149 1.00 1,1,2-Trichloroethane U 0.158 1.00 Trichloroethene U 0.190 1.00 Trichlorofluoromethane U 0.160 5.00 1,2,3-Trichloropropane U 0.237 2.50 1,2,4-Trimethylbenzene U 0.322 1.00 1,3,5-Trimethylbenzene U 0.104 1.00 Vinyl chloride U 0.234 1.00 o-Xylene U 0.174 1.00 m&p-Xylenes U 0.430 2.00 (S) Toluene-d8 104 80.0-120 (S) 4-Bromofluorobenzene 105 77.0-126 (S) 1,2-Dichloroethane-d4 105 70.0-130 Laboratory Control Sample (LCS) • Laboratory Control Sample Duplicate (LCSD) (LCS) R3924922-1 05/14/23 18:45 • (LCSD) R3924922-2 05/14/23 19:04 Spike Amount LCS Result LCSD Result LCS Rec.LCSD Rec.Rec. Limits LCS Qualifier LCSD Qualifier RPD RPD Limits Analyte ug/l ug/l ug/l %%%%% Acetone 25.0 20.7 20.4 82.8 81.6 19.0-160 1.46 27 Acrolein 25.0 19.3 16.8 77.2 67.2 10.0-160 13.9 26 Acrylonitrile 25.0 23.9 23.2 95.6 92.8 55.0-149 2.97 20 Benzene 5.00 4.95 4.55 99.0 91.0 70.0-123 8.42 20 Bromobenzene 5.00 5.22 4.76 104 95.2 73.0-121 9.22 20 Bromodichloromethane 5.00 5.39 4.80 108 96.0 75.0-120 11.6 20 Bromoform 5.00 4.73 4.35 94.6 87.0 68.0-132 8.37 20 1 Cp 2Tc 3Ss 4Cn 5Sr 6Qc 7Gl 8Al 9Sc ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE: ATC Group Services LLC SLC1965803 L1613908 05/15/23 14:49 14 of 19 ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE: ATC Group Services LLC SLC1965803 L1613908 05/15/23 16:49 14 of 19 QUALITY CONTROL SUMMARYWG2059817 Volatile Organic Compounds (GC/MS) by Method 6200B-2011 L1613908-01,02,03,04 Laboratory Control Sample (LCS) • Laboratory Control Sample Duplicate (LCSD) (LCS) R3924922-1 05/14/23 18:45 • (LCSD) R3924922-2 05/14/23 19:04 Spike Amount LCS Result LCSD Result LCS Rec.LCSD Rec.Rec. Limits LCS Qualifier LCSD Qualifier RPD RPD Limits Analyte ug/l ug/l ug/l %%%%% Bromomethane 5.00 5.15 4.54 103 90.8 10.0-160 12.6 25 n-Butylbenzene 5.00 4.94 4.64 98.8 92.8 73.0-125 6.26 20 sec-Butylbenzene 5.00 4.85 4.72 97.0 94.4 75.0-125 2.72 20 tert-Butylbenzene 5.00 4.98 4.61 99.6 92.2 76.0-124 7.72 20 Carbon tetrachloride 5.00 4.67 4.47 93.4 89.4 68.0-126 4.38 20 Chlorobenzene 5.00 5.15 4.86 103 97.2 80.0-121 5.79 20 Chlorodibromomethane 5.00 5.18 4.57 104 91.4 77.0-125 12.5 20 Chloroethane 5.00 5.65 5.04 113 101 47.0-150 11.4 20 Chloroform 5.00 5.22 4.85 104 97.0 73.0-120 7.35 20 Chloromethane 5.00 5.84 5.06 117 101 41.0-142 14.3 20 2-Chlorotoluene 5.00 4.98 4.70 99.6 94.0 76.0-123 5.79 20 4-Chlorotoluene 5.00 4.92 4.58 98.4 91.6 75.0-122 7.16 20 1,2-Dibromo-3-Chloropropane 5.00 5.38 4.81 108 96.2 58.0-134 11.2 20 1,2-Dibromoethane 5.00 5.53 4.85 111 97.0 80.0-122 13.1 20 Dibromomethane 5.00 5.76 5.14 115 103 80.0-120 11.4 20 1,2-Dichlorobenzene 5.00 5.49 5.12 110 102 79.0-121 6.97 20 1,3-Dichlorobenzene 5.00 5.22 4.88 104 97.6 79.0-120 6.73 20 1,4-Dichlorobenzene 5.00 5.22 4.87 104 97.4 79.0-120 6.94 20 Dichlorodifluoromethane 5.00 5.35 4.49 107 89.8 51.0-149 17.5 20 1,1-Dichloroethane 5.00 5.14 4.94 103 98.8 70.0-126 3.97 20 1,2-Dichloroethane 5.00 5.25 4.91 105 98.2 70.0-128 6.69 20 1,1-Dichloroethene 5.00 5.37 5.27 107 105 71.0-124 1.88 20 cis-1,2-Dichloroethene 5.00 5.13 4.99 103 99.8 73.0-120 2.77 20 trans-1,2-Dichloroethene 5.00 5.15 4.62 103 92.4 73.0-120 10.8 20 1,2-Dichloropropane 5.00 5.27 4.93 105 98.6 77.0-125 6.67 20 1,1-Dichloropropene 5.00 4.99 4.92 99.8 98.4 74.0-126 1.41 20 1,3-Dichloropropane 5.00 5.32 4.66 106 93.2 80.0-120 13.2 20 2,2-Dichloropropane 5.00 4.11 3.27 82.2 65.4 58.0-130 J3 22.8 20 Di-isopropyl ether 5.00 5.59 5.08 112 102 58.0-138 9.56 20 Ethylbenzene 5.00 5.11 5.10 102 102 79.0-123 0.196 20 Hexachloro-1,3-butadiene 5.00 5.57 5.35 111 107 54.0-138 4.03 20 Isopropylbenzene 5.00 4.76 4.67 95.2 93.4 76.0-127 1.91 20 p-Isopropyltoluene 5.00 5.05 4.82 101 96.4 76.0-125 4.66 20 2-Butanone (MEK)25.0 23.7 24.4 94.8 97.6 44.0-160 2.91 20 Methylene Chloride 5.00 5.09 4.78 102 95.6 67.0-120 6.28 20 4-Methyl-2-pentanone (MIBK)25.0 28.5 27.1 114 108 68.0-142 5.04 20 Methyl tert-butyl ether 5.00 4.92 4.88 98.4 97.6 68.0-125 0.816 20 Naphthalene 5.00 5.94 5.38 119 108 54.0-135 9.89 20 n-Propylbenzene 5.00 4.85 4.55 97.0 91.0 77.0-124 6.38 20 Styrene 5.00 5.09 4.66 102 93.2 73.0-130 8.82 20 1 Cp 2Tc 3Ss 4Cn 5Sr 6Qc 7Gl 8Al 9Sc ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE: ATC Group Services LLC SLC1965803 L1613908 05/15/23 14:49 15 of 19 ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE: ATC Group Services LLC SLC1965803 L1613908 05/15/23 16:49 15 of 19 QUALITY CONTROL SUMMARYWG2059817 Volatile Organic Compounds (GC/MS) by Method 6200B-2011 L1613908-01,02,03,04 Laboratory Control Sample (LCS) • Laboratory Control Sample Duplicate (LCSD) (LCS) R3924922-1 05/14/23 18:45 • (LCSD) R3924922-2 05/14/23 19:04 Spike Amount LCS Result LCSD Result LCS Rec.LCSD Rec.Rec. Limits LCS Qualifier LCSD Qualifier RPD RPD Limits Analyte ug/l ug/l ug/l %%%%% 1,1,1,2-Tetrachloroethane 5.00 4.73 4.59 94.6 91.8 75.0-125 3.00 20 1,1,2,2-Tetrachloroethane 5.00 4.90 3.89 98.0 77.8 65.0-130 J3 23.0 20 Tetrachloroethene 5.00 5.04 5.03 101 101 72.0-132 0.199 20 Toluene 5.00 5.03 4.80 101 96.0 79.0-120 4.68 20 1,2,3-Trichlorobenzene 5.00 6.68 6.32 134 126 50.0-138 5.54 20 1,2,4-Trichlorobenzene 5.00 5.93 5.25 119 105 57.0-137 12.2 20 1,1,1-Trichloroethane 5.00 4.99 4.87 99.8 97.4 73.0-124 2.43 20 1,1,2-Trichloroethane 5.00 5.51 4.68 110 93.6 80.0-120 16.3 20 Trichloroethene 5.00 5.36 5.52 107 110 78.0-124 2.94 20 Trichlorofluoromethane 5.00 5.41 5.02 108 100 59.0-147 7.48 20 1,2,3-Trichloropropane 5.00 5.05 4.45 101 89.0 73.0-130 12.6 20 1,2,4-Trimethylbenzene 5.00 4.82 4.62 96.4 92.4 76.0-121 4.24 20 1,3,5-Trimethylbenzene 5.00 4.84 4.58 96.8 91.6 76.0-122 5.52 20 Vinyl chloride 5.00 5.38 4.83 108 96.6 67.0-131 10.8 20 o-Xylene 5.00 4.95 4.70 99.0 94.0 80.0-122 5.18 20 m&p-Xylenes 10.0 9.97 9.49 99.7 94.9 80.0-122 4.93 20 (S) Toluene-d8 105 106 80.0-120 (S) 4-Bromofluorobenzene 98.6 99.5 77.0-126 (S) 1,2-Dichloroethane-d4 106 106 70.0-130 1 Cp 2Tc 3Ss 4Cn 5Sr 6Qc 7Gl 8Al 9Sc ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE: ATC Group Services LLC SLC1965803 L1613908 05/15/23 14:49 16 of 19 ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE: ATC Group Services LLC SLC1965803 L1613908 05/15/23 16:49 16 of 19 GLOSSARY OF TERMS Guide to Reading and Understanding Your Laboratory Report The information below is designed to better explain the various terms used in your report of analytical results from the Laboratory. This is not intended as a comprehensive explanation, and if you have additional questions please contact your project representative. Results Disclaimer - Information that may be provided by the customer, and contained within this report, include Permit Limits, Project Name, Sample ID, Sample Matrix, Sample Preservation, Field Blanks, Field Spikes, Field Duplicates, On-Site Data, Sampling Collection Dates/Times, and Sampling Location. Results relate to the accuracy of this information provided, and as the samples are received. Abbreviations and Definitions MDL Method Detection Limit. RDL Reported Detection Limit. Rec.Recovery. RPD Relative Percent Difference. SDG Sample Delivery Group. (S) Surrogate (Surrogate Standard) - Analytes added to every blank, sample, Laboratory Control Sample/Duplicate and Matrix Spike/Duplicate; used to evaluate analytical efficiency by measuring recovery. Surrogates are not expected to be detected in all environmental media. U Not detected at the Reporting Limit (or MDL where applicable). Analyte The name of the particular compound or analysis performed. Some Analyses and Methods will have multiple analytes reported. Dilution If the sample matrix contains an interfering material, the sample preparation volume or weight values differ from the standard, or if concentrations of analytes in the sample are higher than the highest limit of concentration that the laboratory can accurately report, the sample may be diluted for analysis. If a value different than 1 is used in this field, the result reported has already been corrected for this factor. Limits These are the target % recovery ranges or % difference value that the laboratory has historically determined as normal for the method and analyte being reported. Successful QC Sample analysis will target all analytes recovered or duplicated within these ranges. Qualifier This column provides a letter and/or number designation that corresponds to additional information concerning the result reported. If a Qualifier is present, a definition per Qualifier is provided within the Glossary and Definitions page and potentially a discussion of possible implications of the Qualifier in the Case Narrative if applicable. Result The actual analytical final result (corrected for any sample specific characteristics) reported for your sample. If there was no measurable result returned for a specific analyte, the result in this column may state “ND” (Not Detected) or “BDL” (Below Detectable Levels). The information in the results column should always be accompanied by either an MDL (Method Detection Limit) or RDL (Reporting Detection Limit) that defines the lowest value that the laboratory could detect or report for this analyte. Uncertainty (Radiochemistry)Confidence level of 2 sigma. Case Narrative (Cn) A brief discussion about the included sample results, including a discussion of any non-conformances to protocol observed either at sample receipt by the laboratory from the field or during the analytical process. If present, there will be a section in the Case Narrative to discuss the meaning of any data qualifiers used in the report. Quality Control Summary (Qc) This section of the report includes the results of the laboratory quality control analyses required by procedure or analytical methods to assist in evaluating the validity of the results reported for your samples. These analyses are not being performed on your samples typically, but on laboratory generated material. Sample Chain of Custody (Sc) This is the document created in the field when your samples were initially collected. This is used to verify the time and date of collection, the person collecting the samples, and the analyses that the laboratory is requested to perform. This chain of custody also documents all persons (excluding commercial shippers) that have had control or possession of the samples from the time of collection until delivery to the laboratory for analysis. Sample Results (Sr) This section of your report will provide the results of all testing performed on your samples. These results are provided by sample ID and are separated by the analyses performed on each sample. The header line of each analysis section for each sample will provide the name and method number for the analysis reported. Sample Summary (Ss)This section of the Analytical Report defines the specific analyses performed for each sample ID, including the dates and times of preparation and/or analysis. Qualifier Description J The identification of the analyte is acceptable; the reported value is an estimate. J3 The associated batch QC was outside the established quality control range for precision. 1 Cp 2Tc 3Ss 4Cn 5Sr 6Qc 7Gl 8Al 9Sc ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE: ATC Group Services LLC SLC1965803 L1613908 05/15/23 14:49 17 of 19 ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE: ATC Group Services LLC SLC1965803 L1613908 05/15/23 16:49 17 of 19 Pace Analytical National 12065 Lebanon Rd Mount Juliet, TN 37122 Alabama 40660 Nebraska NE-OS-15-05 Alaska 17-026 Nevada TN000032021-1 Arizona AZ0612 New Hampshire 2975 Arkansas 88-0469 New Jersey–NELAP TN002 California 2932 New Mexico ¹TN00003 Colorado TN00003 New York 11742 Connecticut PH-0197 North Carolina Env375 Florida E87487 North Carolina ¹DW21704 Georgia NELAP North Carolina ³41 Georgia ¹923 North Dakota R-140 Idaho TN00003 Ohio–VAP CL0069 Illinois 200008 Oklahoma 9915 Indiana C-TN-01 Oregon TN200002 Iowa 364 Pennsylvania 68-02979 Kansas E-10277 Rhode Island LAO00356 Kentucky ¹ ⁶KY90010 South Carolina 84004002 Kentucky ²16 South Dakota n/a Louisiana AI30792 Tennessee ¹ ⁴2006 Louisiana LA018 Texas T104704245-20-18 Maine TN00003 Texas ⁵LAB0152 Maryland 324 Utah TN000032021-11 Massachusetts M-TN003 Vermont VT2006 Michigan 9958 Virginia 110033 Minnesota 047-999-395 Washington C847 Mississippi TN00003 West Virginia 233 Missouri 340 Wisconsin 998093910 Montana CERT0086 Wyoming A2LA A2LA – ISO 17025 1461.01 AIHA-LAP,LLC EMLAP 100789 A2LA – ISO 17025 ⁵1461.02 DOD 1461.01 Canada 1461.01 USDA P330-15-00234 EPA–Crypto TN00003 ACCREDITATIONS & LOCATIONS ¹ Drinking Water ² Underground Storage Tanks ³ Aquatic Toxicity ⁴ Chemical/Microbiological ⁵ Mold ⁶ Wastewater n/a Accreditation not applicable * Not all certifications held by the laboratory are applicable to the results reported in the attached report. * Accreditation is only applicable to the test methods specified on each scope of accreditation held by Pace Analytical. 1 Cp 2Tc 3Ss 4Cn 5Sr 6Qc 7Gl 8Al 9Sc ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE: ATC Group Services LLC SLC1965803 L1613908 05/15/23 14:49 18 of 19 ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE: ATC Group Services LLC SLC1965803 L1613908 05/15/23 16:49 18 of 19