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DERR-2024-012575
Page 1 ATLAS 358 South 700 East, B518 Salt Lake City, Utah 84102 Office: 801-935-4917 www.oneatlas.com November 27, 2024 Mr. Kevin Beery Utah Department of Environmental Quality Division of Environmental Response and Remediation 195 North 1950 West Salt Lake City, Utah 84114-4840 SUBJECT: Groundwater Monitoring Report Former Rose Park Corner Mart 950 West 1000 North Salt Lake City, Utah Release Site #KEC Facility ID #4000903 WA KEC-25 UDEQ Technical Services Contract #216364 Dear Mr. Beery: Please find attached the Groundwater Monitoring Report for the above referenced site. INTRODUCTION On October 23, 2024, Atlas Technical Consultants LLC (Atlas) conducted a groundwater monitoring event at the former Rose Park Corner Mart located at 950 West 1000 North, Salt Lake City, Utah (see Figure 1). The work was performed on behalf of the Utah Department Environmental Quality, Division of Environmental Response and Remediation (DERR) under Work Assignment KEC-25. GROUNDWATER MONITORING FIELD PROCEDURES The field and laboratory procedures utilized to collect the information presented in this report are discussed in the following sections. Field Parameters, Well Purging Procedures, and Chemical Analysis The approved work plan included sampling monitoring wells MW -1, MW -2, MW -4B, MW -5B, MW -6, MW -7, and MW -8. The site map depicting the groundwater monitoring well locations and other site features is presented as Figure 1. Prior to well purging, groundwater depth was measured in all monitoring wells using an electronic water level/free product interface probe. The probe was given an Alconox wash & rinse between wells to avoid cross contamination. No free product was observed in any of the monitoring wells. Following field parameter measurements all monitoring wells were purged of three well volumes or until dry using new, factory-sealed, disposable PVC bailers. Following the purging process, the wells were allowed to recharge to within 95 percent of the pre-purge water level and then sampled. The samples were transferred to appropriate containers and immediately placed on ice in an insulated cooler and then transported under chain-of-custody documentation to a Utah-certified laboratory for analysis. The groundwater samples were analyzed for total petroleum hydrocarbons as gasoline (TPH-GRO) and TPH as diesel (TPH-DRO) using EPA Method 8015; and for methyl t-butyl ether, benzene, toluene, ethyl benzene, total xylenes, and naphthalene (MBTEXN) using EPA Method 8260. The field parameter measurements are presented in Table 1. Page 2 ATLAS The October 2024 groundwater elevation data were utilized to prepare a groundwater contour map (Figure 2) for the site. The groundwater elevation data collected from the wells indicates groundwater flows toward the west with a gradient of 0.004 ft/ft measured between MW -1 and MW -7. Historical data has indicated that the groundwater gradient is typically toward the south- southwest. The groundwater gradient map is presented as Figure 2. Groundwater Laboratory Results The laboratory results for the samples collected from the monitoring wells in October 2024 indicated the presence of benzene above its Tier I Screening Level (300 µg/L) in MW -8 (326 mg/L). No other petroleum constituents were measured above their respective Tier I Screening Levels in any of the other wells sampled. TPH-GRO and TPH-DRO laboratory results indicate that the Tier I Screening Level of 10 mg/L was not exceeded in any of the wells sampled. The laboratory data are summarized in Table 2 and a copy of the laboratory report is included in Appendix A. CONCLUSIONS AND RECOMMENDATIONS The results of the October 2024 groundwater monitoring event indicate the benzene concentration in MW -8 has increased since the September 2023 monitoring event, and remains above the Tier I Screening Level 300 µg/L. Review of the historical groundwater data collected at the site indicates that benzene concentrations fluctuate with the rise and fall of the water table and that a rise in water-table elevation usually correlates with a decrease in benzene concentration and a drop in water-table elevation usually correlates with an increase in benzene concentration. Based upon review of the data, Atlas recommends that the annual groundwater monitoring program continue at the site. In addition, the last top of well casing (TOC) survey was completed in 2001. Atlas recommends that a new TOC survey be completed during the next sampling event. Upon request of the UDEQ Atlas will submit a work plan to conduct the next annual sampling event. Our services consist of professional opinions and recommendations made in accordance with generally accepted geotechnical and environmental engineering principles and practices. This warranty is in lieu of all other warranties either expressed or implied. Should you have any questions, please do not hesitate to call us at (801) 971-1064. Sincerely, Atlas Technical Consultants LLC Olaf Questereit James J. Coletta, P.G Senior Technician Branch Manager GS #1326 Utah Certified PST Consultant UST CC #0150 FIGURES TABLES 1 of 4 Sample Location Date Relative Elevation (ft)1 Depth to Water (ft) Groundwater Elevation (ft bgs) Temperature (deg. F)DO ORP pH Specific Conductivity (uS/cm) MW-1 09/01/91 NA 02/26/97 NA 08/19/99 NA 12/21/99 NA 06/08/00 98.62 3.50 95.12 10/27/01 98.60 4.63 93.97 01/26/02 4.78 93.82 04/11/02 4.30 94.30 07/05/02 5.03 93.57 10/08/02 5.30 93.30 12/19/02 5.14 93.46 05/06/03 4.52 94.08 08/26/03 5.60 93.00 11/20/03 5.02 93.58 03/09/04 3.50 95.10 06/03/04 4.86 93.74 11/29/04 3.80 94.80 02/22/05 3.55 95.05 03/24/06 2.55 96.05 63.3 7.53 1,101 11/01/07 3.48 95.12 67.66 7.20 1,725 05/29/08 3.59 95.01 56.45 7.28 1,708 07/30/09 3.42 95.18 63.63 7.31 2,487 01/25/10 3.69 94.91 55.10 7.65 2,052 04/25/11 3.16 95.44 53.24 7.43 873 03/29/12 3.64 94.96 52.51 7.43 893 05/21/13 3.35 95.25 57.30 7.44 3,120 12/13/13 4.61 93.99 60.6 7.43 2,971 07/11/18 09/28/23 4.87 93.73 N/M N/M N/M 10/23/24 5.02 93.58 N/M N/M N/M MW-2 09/01/91 NA 02/26/97 NA 08/19/99 NA 12/21/99 NA 06/08/00 100.00 4.70 95.30 10/27/01 100.00 5.46 94.54 01/26/02 3.34 96.66 04/11/02 3.97 96.03 07/05/02 4.74 95.26 10/08/02 4.85 95.15 12/19/02 5.28 94.72 05/06/03 4.06 95.94 08/26/03 6.15 93.85 11/20/03 4.90 95.10 03/09/04 3.85 96.15 06/03/04 4.36 95.64 11/29/04 4.18 95.82 02/22/05 4.00 96.00 03/24/06 3.60 96.40 58.4 5.26 1,417 11/01/07 5.01 94.99 71.38 6.98 1,725 05/29/08 4.59 95.41 61.23 7.06 1,326 07/30/09 4.88 95.12 68.14 7.15 1,991 01/25/10 4.83 95.17 53.15 7.51 1,434 04/25/11 3.93 96.07 54.66 7.44 433 03/29/12 4.50 95.50 52.81 7.71 346 05/21/13 4.52 95.48 58.70 7.52 1,301 12/13/13 6.09 93.91 60.8 7.47 1,686 07/11/18 5.58 94.42 N/M N/M N/M 06/01/22 4.79 95.21 N/M N/M N/M 09/28/23 6.50 93.50 N/M N/M N/M 10/23/24 6.72 93.28 N/M N/M N/M TABLE 1 Groundwater Elevation Measurements and Field Parameters Rose Park Corner Mart (Release KEC) Salt Lake City, Utah 950 West 1000 North Well not located 2 of 4 Sample Location Date Relative Elevation (ft)1 Depth to Water (ft) Groundwater Elevation (ft bgs) Temperature (deg. F)DO ORP pH Specific Conductivity (uS/cm) TABLE 1 Groundwater Elevation Measurements and Field Parameters Rose Park Corner Mart (Release KEC) Salt Lake City, Utah 950 West 1000 North MW-3 09/01/91 NA 02/26/97 NA 08/19/99 NA 12/21/99 NA 06/08/00 98.38 4.52 93.86 10/27/01 98.68 5.57 93.11 01/26/02 4.72 93.96 04/11/02 3.98 94.70 07/05/02 5.54 93.14 10/08/02 5.60 93.08 MW-3 12/19/02 5.87 92.81 Cont.05/06/03 3.50 95.18 08/26/03 5.95 92.73 11/20/03 6.30 92.38 03/09/04 3.80 94.88 06/03/04 4.49 94.19 11/29/04 3.95 94.73 02/22/05 3.70 94.98 03/24/06 3.60 95.08 60.5 7.82 2,330 11/01/07 4.44 94.24 66.07 7.04 3,878 05/29/08 3.83 94.85 58.17 7.14 6,097 07/30/09 4.27 94.41 69.23 7.26 8,083 01/25/10 4.43 94.25 51.09 7.25 4,901 04/25/11 3.53 95.15 52.73 7.29 1,297 03/29/12 4.15 94.53 52.71 7.58 1,328 05/21/13 4.11 94.57 59.50 7.30 7,268 12/13/13 5.48 93.20 57.00 7.47 4,825 07/11/18 MW-4R 04/16/97 NA 08/19/99 NA 03/24/06 3.30 56.5 7.83 3,410 MW-4B 06/08/00 98.71 3.37 95.34 10/27/01 98.75 4.63 94.12 01/26/02 4.26 94.49 04/11/02 3.98 94.77 07/05/02 5.54 93.21 10/08/02 5.60 93.15 12/19/02 4.90 93.85 05/06/03 3.94 94.81 08/26/03 5.35 93.40 11/20/03 4.42 94.33 03/09/04 2.90 95.85 06/03/04 4.00 94.75 11/29/04 3.22 95.53 02/22/05 2.20 96.55 03/24/06 2.70 96.05 65.1 8.24 786 11/01/07 3.86 94.89 66.78 7.12 1,411 05/29/08 3.54 95.21 56.83 7.20 1,300 07/30/09 3.42 95.33 61.99 7.61 1,934 01/25/10 3.56 95.19 56.46 7.53 1,479 04/25/11 2.98 95.77 53.99 7.76 650 03/29/12 3.75 95.00 54.61 7.50 617 05/21/13 3.56 95.19 58.40 7.76 2,115 12/13/13 4.71 94.04 60.3 7.35 2,235 07/11/18 4.53 94.22 N/M N/M N/M 06/01/22 3.75 95.00 N/M N/M N/M 09/28/23 5.12 93.63 N/M N/M N/M 10/23/24 5.32 93.43 N/M N/M N/M Well was filled with debris 3 of 4 Sample Location Date Relative Elevation (ft)1 Depth to Water (ft) Groundwater Elevation (ft bgs) Temperature (deg. F)DO ORP pH Specific Conductivity (uS/cm) TABLE 1 Groundwater Elevation Measurements and Field Parameters Rose Park Corner Mart (Release KEC) Salt Lake City, Utah 950 West 1000 North MW-5B 06/08/00 99.53 4.05 95.48 10/27/01 99.55 5.36 94.19 01/26/02 4.25 95.30 04/11/02 4.02 95.53 07/05/02 4.33 95.22 10/08/02 4.60 94.95 12/19/02 4.94 94.61 05/06/03 3.83 95.72 08/26/03 5.40 94.15 11/20/03 4.75 94.80 03/09/04 3.15 96.40 06/03/04 3.95 95.60 11/29/04 3.48 96.07 02/22/05 3.20 96.35 03/24/06 3.10 96.45 60.6 8.12 1,185 07/11/18 4.97 94.58 N/M N/M N/M 06/01/22 4.59 94.96 N/M N/M N/M 09/28/23 5.97 93.58 N/M N/M N/M 10/23/24 6.20 93.35 N/M N/M N/M MW-6 06/08/00 98.74 3.50 95.2410/27/01 98.74 4.72 94.02 01/26/02 6.51 92.23 04/11/02 6.55 92.19 07/05/02 6.20 92.54 10/08/02 6.25 92.49 12/19/02 6.45 92.29 05/06/03 5.80 92.94 08/26/03 6.94 91.80 11/20/03 6.65 92.09 03/09/04 2.90 95.84 06/03/04 5.71 93.03 11/29/04 5.35 93.39 02/22/05 4.94 93.80 03/24/06 2.85 95.89 63.3 7.81 1,541 11/01/07 3.89 94.85 68.81 7.18 1,632 05/29/08 3.50 95.24 57.94 7.38 1,920 07/30/09 3.49 95.25 61.94 7.37 2,545 01/25/10 3.80 94.94 57.47 7.48 1,908 07/11/18 4.56 94.18 N/M N/M N/M 06/01/22 3.76 94.98 N/M N/M N/M 09/28/23 5.14 93.60 N/M N/M N/M 10/23/24 5.33 93.41 N/M N/M N/M MW-7 06/08/00 98.75 3.94 94.81 10/27/01 98.73 4.93 93.80 01/26/02 4.75 93.98 04/11/02 3.03 95.70 07/05/02 5.37 93.36 10/08/02 5.20 93.53 12/19/02 6.29 92.44 05/06/03 3.23 95.50 08/26/03 5.45 93.28 11/20/03 5.25 93.48 03/09/04 4.50 94.23 06/03/04 4.72 94.01 11/29/04 4.10 94.63 02/22/05 3.80 94.93 03/24/06 3.60 95.13 60.2 6.91 2,650 07/11/18 4.30 94.43 N/M N/M N/M 06/01/22 3.95 94.78 N/M N/M N/M 09/28/23 5.53 93.20 N/M N/M N/M 10/23/24 5.48 93.25 N/M N/M N/M 4 of 4 Sample Location Date Relative Elevation (ft)1 Depth to Water (ft) Groundwater Elevation (ft bgs) Temperature (deg. F)DO ORP pH Specific Conductivity (uS/cm) TABLE 1 Groundwater Elevation Measurements and Field Parameters Rose Park Corner Mart (Release KEC) Salt Lake City, Utah 950 West 1000 North MW-8 10/27/01 99.17 5.04 94.13 01/26/02 2.90 96.27 04/11/02 2.84 96.33 07/05/02 2.94 96.23 10/08/02 3.10 96.07 12/19/02 3.54 95.63 05/06/03 2.87 96.30 08/26/03 4.30 94.87 11/20/03 3.10 96.07 03/09/04 2.90 96.27 06/03/04 2.92 96.25 11/29/04 2.50 96.67 02/22/05 2.70 96.47 03/24/06 3.10 96.07 64.9 7.41 2,220 11/01/07 4.14 95.03 69.16 7.42 1,356 05/29/08 3.87 95.30 66.73 7.29 1,696 07/30/09 3.90 95.27 77.05 7.30 3,627 01/25/10 4.22 94.95 48.71 7.46 3,819 04/25/11 3.20 95.97 56.20 7.38 1,101 03/29/12 3.87 95.30 56.21 8.35 1,017 05/21/13 3.79 95.38 66.70 7.33 4,725 12/13/13 5.21 93.96 58.7 7.41 4,384 08/31/15 4.38 94.79 81.84 1.43 35.40 6.95 2,981 10/05/15 4.40 94.77 76.5 4.11 -16.3 7.89 2,593 07/11/18 4.80 94.37 N/M N/M N/M 06/01/22 4.25 94.92 N/M N/M N/M 09/28/23 5.60 93.57 N/M N/M N/M 10/23/24 5.81 93.36 N/M N/M N/M Notes N/M - Not Measured 1 - Relative elevations based on 100 foot benchmark (MW-2). Survey elevations from Access Environmental. 1 of 4 Sample Location Date Depth to Water (ft) TPH-GRO (mg/L) TPH-DRO (mg/L) Benzene (ug/L) Toluene (ug/L) Ethylbenzene (ug/L) Xylenes (ug/L) Naphthalene (ug/L) MTBE (ug/L)Notes ISL 1 1 5 1,000 700 10,000 700 200 Tier 1 10 10 300 3,000 4,000 10,000 700 200 MW-1 09/01/91 NA 45.3 NA 18,800 35,100 <2,500 13,240 NA NA 02/26/97 NA 99.3 <0.5 3,880 9,180 2,280 15,300 471 <200 08/19/99 NA 25.3 NA 1,228 519 789 4,499 138 <10 12/21/99 NA 77.2 NA 1,620 3,200 1,940 10,600 315 <200 10/27/01 4.63 17 5.5 380 700 1,200 7,400 <500 <100 01/26/02 4.78 28 <2.5 1,700 3,900 1,800 10,000 260 <100 04/11/02 4.30 56.3 3.6 1,740 3,600 1,730 9,970 210 <100 07/05/02 5.03 24 0.24 1,400 1,600 1,100 6,500 <500 <100 trace fp 10/08/02 5.30 41.7 4.4 1,240 1,690 1,460 8,080 243 <100 1" fp 12/19/02 5.14 58.6 55.5 1,180 2,090 1,560 10,500 546 <100 1/8" fp 05/06/03 4.52 56.1 6.3 1,620 1,640 1,430 8,700 302 289 1/16" fp 08/26/03 5.60 37 6 1,380 953 1,500 8,730 337 295 1/8" fp 11/20/03 5.02 92.3 91.8 1,530 4,500 3,090 22,400 624 273 1" fp 03/09/04 3.50 79 20.6 2,180 4,442 2,660 20,100 491 623 1/4" fp 06/03/04 4.86 28.6 7.87 1,090 352 700 6,000 241 474 1/8" fp 11/29/04 3.80 32.9 10.43 830 2,346 1,507 9,090 539 180 02/22/05 3.55 32.6 9.65 123 2,154 1,402 8,520 453 74 trace fp 03/24/06 2.55 22 8.9 180 230 1,600 9,800 270 26 11/01/07 3.48 22 4.2 83 110 1,700 9,600 230 <40 05/29/08 3.59 22 3.5 53 110 1,600 9,500 250 33 S 07/08/09 3.42 13 <2.7 15 81 1,600 12,000 310 <2 01/25/10 3.69 13 4.0 <20 47 1,400 8,900 160 <40 04/25/11 3.16 19.5 2.40 58.3 7.34 892 5,330 207 52.1 03/29/12 3.64 15.0 4.16 1.56 30.3 1,150 7,520 281 11.7 05/21/13 3.35 8.70 2.31 3.42 173 999 4,510 223 <2.00 12/13/13 4.61 7.44 2.21 1.11 5.21 556 2,810 220 <2.00 07/11/18 09/28/23 4.87 NA NA NA NA NA NA NA NA 10/23/24 5.02 2.150 0.728 1.28 0.716 J 0.858 J 7.62 1.81 J 18.4 MW-2 09/01/91 NA 26.2 NA 14,000 17,900 905 5,140 NA NA 02/26/97 NA 96 22.5 3,960 5,510 1,540 12,600 567 <130 fp 08/19/99 NA 27 NA 850 67 127 2,800 179 3.8 12/21/99 NA 49.5 NA 1,380 342 1,280 7,630 349 <100 10/27/01 5.46 14 6.5 660 <1,200 1,300 8,000 1,400 <250 01/26/02 3.34 14 3.2 730 <1,200 1,000 4,700 500 250 04/11/02 3.97 31.6 5.8 965 150 1,380 6,610 531 <50 07/05/02 4.74 22 0.36 1,800 <250 1,400 6,800 <250 <50 10/08/02 4.85 30.3 5.2 1,030 <50 1,160 4,970 446 <50 12/19/02 5.28 23.5 6.5 924 32.4 840 3,290 409 <20 05/06/03 4.06 24.1 6.2 593 24 623 2,230 321 <20 08/26/03 6.15 8 3.75 385 <20 255 699 255 <20 11/20/03 4.90 17.5 11.1 521 24 555 1,580 354 <10 03/09/04 3.85 25.9 6.13 713 86 1,030 4,190 398 79 06/03/04 4.36 15.9 6.78 687 36 668 2,080 398 36 11/29/04 4.18 12.6 7.75 407 24 835 1,900 604 87 02/22/05 4.00 16.9 7.85 468 53 977 2,680 714 95 03/24/06 3.60 8.7 4.5 730 24 580 2,300 300 <20 11/01/07 5.01 11 4.5 410 <20 590 1,300 300 <20 05/29/08 4.59 17 3.7 380 16 890 2,800 330 <2 07/08/09 4.88 8.9 2.5 160 7.6 490 2,200 350 <2 01/25/10 4.83 4.4 2.2 100 <20 390 1,300 270 <20 04/25/11 3.93 12.6 2.21 21.3 <2 262 1,170 196 <2 03/29/12 4.50 2.97 2.00 2.39 <2.00 175 339 170 <2.00 05/21/13 4.52 2.69 1.31 19.1 <2.00 127 257 183 <2.00 12/13/13 6.09 2.20 1.46 89.9 <2.00 32.4 37.2 172 <2.00 07/11/18 5.58 4.97 2.9 43.0 <12 13.0 13.0 150 <5 TABLE 2 Rose Park Corner Mart (Release KEC) Salt Lake City, Utah Groundwater Analytical Results 950 West 1000 North Well Could Not Be Located (Presumed to be covered with concrete) 2 of 4 Sample Location Date Depth to Water (ft) TPH-GRO (mg/L) TPH-DRO (mg/L) Benzene (ug/L) Toluene (ug/L) Ethylbenzene (ug/L) Xylenes (ug/L) Naphthalene (ug/L) MTBE (ug/L)Notes ISL 1 1 5 1,000 700 10,000 700 200 Tier 1 10 10 300 3,000 4,000 10,000 700 200 TABLE 2 Rose Park Corner Mart (Release KEC) Salt Lake City, Utah Groundwater Analytical Results 950 West 1000 North MW-2 06/01/22 4.79 1.640 2.450 2.73 1.11 2.08 1.84 J 12.3 <1.0 (Cont.)09/28/23 6.50 1.590 2.310 1.11 0.461 J 0.884 J 1.31 J 6.70 <1.00 10/23/24 6.72 0.576 1.640 0.748 J 0.545 J 0.323 J 0.779 J 1.09 J <1.00 MW-3 09/01/91 NA 2,460 NA 14,000 57,700 4,830 43,300 NA NA 02/26/97 NA 98.3 8.5 6,330 4,620 2,450 16,800 556 170 fp 08/19/99 NA 126 NA 2,014 171 324 13,600 577 367 12/21/99 NA 454 NA 2,910 1,330 1,950 16,100 686 519 10/27/01 5.57 150 22 2,000 <5,000 22,000 260,000 36,000 <1,000 01/26/02 4.72 43 15 3,300 <5,000 2,000 13,000 1,700 <1,000 3" fp 04/11/02 3.98 134 33.7 2,600 224 1,620 12,900 1,200 481 2" fp 07/05/02 5.54 53 0.46 6,800 <2,500 1,400 9,900 <2,500 3,100 1/2" fp 10/08/02 5.60 72.1 37.1 5,180 187 1,540 12,900 646 3,820 1/8" fp 12/19/02 5.87 38.8 9.9 4,840 123 1,040 5,960 443 3,000 trace fp 05/06/03 3.50 61.9 24.1 1,920 107 869 8,480 656 1,250 trace fp 08/26/03 5.95 30.2 6 3,350 <100 684 4,380 336 1,940 trace fp 11/20/03 6.30 34.2 12 2,670 122 846 5,800 347 1,430 1/8" fp 03/09/04 3.80 41.7 8.22 2,350 224 1,470 8,540 415 1,080 1/8" fp 06/03/04 4.49 22.3 6.09 1,430 86 706 4,420 270 793 trace fp 11/29/04 3.95 16.7 6.45 951 77 988 4,950 352 351 02/22/05 3.70 21.8 6.24 1,288 122 1,360 6,210 447 334 03/24/06 3.60 17 28 450 63 1,400 6,100 300 55 11/01/07 4.44 6.3 4.7 270 <20 350 980 79 32 05/29/08 3.83 5.5 1.5 940 4 210 320 67 150 07/30/09 4.27 3.7 13 1,200 <20 190 130 22 170 S 01/25/10 4.43 2.8 1.4 68 <20 480 150 83 <20 04/25/11 3.53 14.2 2.25 30.9 3.11 600 268 209 5.74 03/29/12 4.15 3.84 6.07 13.4 <2.00 370 82.5 160 4.00 05/21/13 4.11 2.94 40.8 39 <2.00 673 44.8 249 <2.00 12/13/13 5.48 2.49 3.60 15.3 <2.00 43.4 20.7 2.28 <2.00 07/11/18 MW-4A1 09/01/91 NA <1 NA <1 <1 <1 <1 NA NA MW-4R2 04/16/97 NA <0.5 NA <2 <2 <2 <6 <2 <2 Replacement 08/19/99 NA <1 NA <0.5 2.9 <0.5 221.6 <1 <1 Replacement 03/24/06 3.30 <0.02 <0.5 <1 <2 <2 <2 <2 32 MW-4A on COC MW-4B3 10/27/01 4.63 0.28 <1.2 18 34 13 54 <25 <5 01/26/02 4.26 3.5 <2.5 170 290 220 670 13 <10 04/11/02 3.98 4.5 0.8 104 419 202 720 32.7 <10 07/05/02 5.54 0.27 <0.1 14 31 18 44 <25 <5 10/08/02 5.60 0.66 <0.5 25.8 70.4 22 104 4 <2 12/19/02 4.90 2.1 1.4 51.5 180 66.7 385 11.5 <5 05/06/03 3.94 10.4 3.5 155 714 255 1,430 41 <5 08/26/03 5.35 2.7 1.6 82 215 108 557 16 <5 11/20/03 4.42 2.9 3.76 96 281 109 695 18 16 03/09/04 2.90 1.46 2.59 251 7 66 6,080 17 <5 06/03/04 4.00 1.01 1.97 15 70 47 224 9 <2 11/29/04 3.22 9.6 2.46 56 962 517 2,270 115 88 02/22/05 2.20 14.3 2.99 27 802 1,038 2,550 265 <2 03/24/06 2.70 6.4 2.6 <10 980 690 2,900 58 <20 11/01/07 3.86 15 1.9 <20 2,000 1,800 6,700 120 <40 05/29/08 3.54 9.6 0.98 <10 510 1,000 4,800 79 <20 07/08/09 3.42 4.7 0.64 <1 120 590 2,700 86 <2 01/25/10 3.56 6.9 0.88 <10 270 920 4,600 89 <20 04/25/11 2.98 1.98 <0.5 <1 26.6 157 816 16.0 <2 03/29/12 3.75 5.42 0.692 <1.00 96.1 445 2,620 85.7 <2.00 05/21/13 3.56 1.52 <0.0500 2.33 21.7 210 945 35.0 <2.00 12/13/13 4.71 1.28 0.503 <1 31.7 55.5 480 23.2 <2 Well Is Filled With Debris 3 of 4 Sample Location Date Depth to Water (ft) TPH-GRO (mg/L) TPH-DRO (mg/L) Benzene (ug/L) Toluene (ug/L) Ethylbenzene (ug/L) Xylenes (ug/L) Naphthalene (ug/L) MTBE (ug/L)Notes ISL 1 1 5 1,000 700 10,000 700 200 Tier 1 10 10 300 3,000 4,000 10,000 700 200 TABLE 2 Rose Park Corner Mart (Release KEC) Salt Lake City, Utah Groundwater Analytical Results 950 West 1000 North MW-4B 07/11/18 4.53 <0.125 <1.0 <5 <12 <12 <12 <12 <5 (Cont.)06/01/22 3.75 21.300 2.460 <10 39.4 1,000 5,830 190 <10.0 09/28/23 5.12 2.470 1.180 0.325 J 3.59 14.3 124 69.2 <1.00 10/23/24 5.32 1.250 0.415 0.489 J 1.23 0.930 J 7.69 12.3 <1.00 MW-5A1 09/01/91 NA <1 NA <1 <1 <1 1.2 NA NA MW-5R2 04/16/97 NA <0.5 NA <2 <2 <2 <6 <2 <2 Replacement MW-5B3 10/27/01 5.36 2 <1.2 2.7 18 82 230 24 <1 01/26/02 4.25 0.17 <2.5 7.6 6.1 <1 28 1.9 <1 04/11/02 4.02 13.3 1 1,450 66.4 488 2,030 59.6 <20 07/05/02 4.33 2.1 <0.1 1,100 <120 240 <75 <120 <25 10/08/02 4.60 2.4 0.74 431 <50 <50 187 <50 <50 12/19/02 4.94 <0.5 <0.5 <2 <2 <2 <6 <2 <2 05/06/03 3.83 6 3.6 731 93 180 493 24 <10 08/26/03 5.40 <0.5 1.6 8 4 10 30 2 <2 11/20/03 4.75 1.19 <2 114 6 13 68 5 19 03/09/04 3.15 11.4 2.79 200 1,460 454 2,100 52 <2 06/03/04 3.95 1.58 2.12 209 13 176 21 33 8 11/29/04 3.48 <0.5 <0.5 9 2 <2 22 5 3 02/22/05 3.20 <0.5 <0.5 <2 <2 <2 <6 2 <2 03/24/06 3.10 0.7 <0.5 4 <2 14 13 2.1 <2 07/11/18 4.97 6.95 1.6 <5 41 314 1,130 179.0 <5 06/01/22 4.59 <0.100 0.0989 J <1.00 <1.00 <1.00 <3.00 <5.00 <1.00 09/28/23 5.97 <0.100 0.0506 J <1.00 <1.00 <1.00 <3.00 <5.00 <1.00 10/23/24 6.20 0.0350 B,J 0.0755 J <1.00 <1.00 <1.00 <3.00 <5.00 <1.00 MW-6 10/27/01 4.72 8.4 1.5 2,500 940 300 1,800 <250 <50 01/26/02 6.51 60 2.7 2,800 16,000 2,400 16,000 410 <250 04/11/02 6.55 34 1.8 1,290 4,420 1,190 6,590 254 <50 07/05/02 6.20 26 0.14 2,200 4,100 1,200 6,700 <2,500 <500 10/08/02 6.25 15.7 1.3 1,140 1,080 798 2,630 <100 <100 12/19/02 6.45 23.6 2.1 1,800 2,230 880 3,790 112 <20 05/06/03 5.80 45.8 4.3 1,900 3,940 1,250 6,740 210 <20 08/26/03 6.94 22.1 2.93 1,320 1,500 899 5,100 159 <100 11/20/03 6.65 30.7 7.72 990 2,140 1,220 8,520 238 <100 03/09/04 2.90 47 4.25 2,160 6,300 1,780 11,700 276 <100 06/03/04 5.71 20.9 4.11 644 1,310 791 4,900 139 <10 11/29/04 5.35 26.6 4.57 1,007 3,135 1,510 8,190 272 163 02/22/05 4.94 27.4 4.33 595 2,726 1,531 8,140 314 150 03/24/06 2.85 4.3 1.6 64 51 340 540 31 <2 11/01/07 3.89 5.1 1.1 29 68 78 690 67 <2 05/29/08 3.50 3.4 <0.52 5.5 <2 5.1 6.5 <2 <2 07/08/09 3.49 2.3 <0.52 5.6 9.9 56 220 14 <2 01/25/10 3.80 5.6 0.96 <10 98 550 3,500 80 <20 07/11/18 4.56 3.56 1.1 <5 <12 <12 161 <12 <5 06/01/22 3.76 1.780 0.465 0.275 J 0.446 J 0.137 J 6.45 <5.0 <1.0 09/28/23 5.14 1.050 0.163 0.274 J <1.00 <1.00 <3.00 <5.00 <1.00 10/23/24 5.33 0.849 0.150 0.274 J 0.432 J <1.00 <3.00 <5.00 <1.00 MW-7 10/27/01 4.93 8.8 4 4,900 <500 <100 <300 <500 620 01/26/02 4.75 12 5.2 2,900 <250 1,400 2,300 320 580 04/11/02 3.03 18.6 4.8 853 <20 1,060 1,200 392 380 07/05/02 5.37 4.9 0.22 280 <100 710 550 220 <20 10/08/02 5.20 2.1 1.6 <20 <20 71.7 <60 <20 26.9 12/19/02 6.29 2.5 2.5 6.3 <2 71 <6 5.6 14.7 05/06/03 3.23 3.2 4 6 3 22 <6 6 24 08/26/03 5.45 1.7 2.1 45 3 35 <6 12 54 11/20/03 5.25 1.88 3.74 3 2 28 <6 7 15 4 of 4 Sample Location Date Depth to Water (ft) TPH-GRO (mg/L) TPH-DRO (mg/L) Benzene (ug/L) Toluene (ug/L) Ethylbenzene (ug/L) Xylenes (ug/L) Naphthalene (ug/L) MTBE (ug/L)Notes ISL 1 1 5 1,000 700 10,000 700 200 Tier 1 10 10 300 3,000 4,000 10,000 700 200 TABLE 2 Rose Park Corner Mart (Release KEC) Salt Lake City, Utah Groundwater Analytical Results 950 West 1000 North MW-7 03/09/04 4.50 1.52 3.17 <2 <2 7 <6 3 14 (Cont.)06/03/04 4.72 0.89 2.21 <2 <2 <2 <6 <2 8 11/29/04 4.10 1.02 0.87 <2 4 3 9 <4 7 03/24/06 3.60 0.92 <0.5 <1 <2 <2 <2 <2 6.5 07/11/18 4.30 0.418 <1.0 <5 <12 <12 <12 <12 <5 06/01/22 3.95 0.157 B 0.396 0.105 J <1.0 <1.0 <3.0 <5.0 1.62 09/28/23 5.53 0.0498 J 0.174 <1.00 <1.00 <1.00 <3.00 <5.00 1.82 10/23/24 5.48 0.0785 B,J 0.369 <1.00 <1.00 <1.00 <3.00 <5.00 2.08 MW-8 10/27/01 5.04 79 24 4,700 <2,500 2,600 1,400 5,000 1,400 01/26/02 2.90 0.73 3.8 80 <250 111 1,900 140 74 04/11/02 2.84 2.7 1.1 49.2 17.6 20.7 280 22.6 84.5 07/05/02 2.94 0.88 <0.1 35 <5 35 73 17 36 10/08/02 3.10 0.56 0.52 41.7 4.1 16.6 22.6 5.7 29.4 12/19/02 3.54 0.65 1.7 20.2 2.2 8.5 10.2 5.1 22.7 05/06/03 2.87 <0.5 <0.5 14 <2 4 <6 <2 26 08/26/03 4.30 5.4 3.2 442 256 252 796 63 119 11/20/03 3.10 <1 <2 3 <2 5 9 <2 29 03/09/04 2.90 0.62 2.34 35 6 23 42 4 40 06/03/04 2.92 <0.5 <0.5 3 <2 3 9 <2 22 11/29/04 2.50 <0.5 <0.5 <2 <2 <2 <6 <4 24 03/24/06 3.10 1.7 0.68 470 11 160 390 41 24 11/01/07 4.14 0.71 <0.5 100 3.9 36 100 13 9.9 05/29/08 3.87 0.094 <1.0 7.6 <2 2.7 2.1 <2 <2 07/08/09 3.90 0.43 <0.51 96 <2 9.5 15 5.8 5.1 01/25/10 4.22 0.92 0.76 310 2.8 70 22 48 8.7 04/25/11 3.20 2.82 0.609 623 4.86 43.2 27.8 43.6 4.67 03/29/12 3.87 0.628 0.622 178 <2.00 9.60 10.2 27.3 <2.00 05/21/13 3.79 1.40 0.528 649 2.97 10.5 17.8 67.7 <2.00 12/13/13 5.21 7.02 3.15 4,890 22.0 166 85.2 520 43.3 08/31/15 4.38 1.75 <1.0 860 <5 7 <5 5 <5 10/05/15 4.40 3.42 2.8 1,730 <5 52 16 53 <5 03/31/16 3.43 0.091 <1.0 18 <5 <5 <5 <<5 10/10/16 4.78 5.08 2.7 863 <25 47 48 42 <25 07/11/18 4.80 2.03 1.3 665 <12 <12 13 12 <5 06/01/22 4.25 3.340 2.940 363 6.09 10.9 26.8 186 0.387 J 09/28/23 5.60 2.330 4.820 309 7.25 J 7.53 J 27.5 J 47.3 J <10.0 10/23/24 5.81 3.210 3.580 326 9.10 J 16.8 29.5 J 167 <10.0 Notes: J - The identification of the analyte is acceptable; the reported value is an estimate.1 - Installed in 1991 (currently damaged) B - The same analyte is found in the associated blank.2 - Replacement wells installed in 1997 (MW-5R currently damaged) Bold values indicate and exceedence of the Tier 1 Screening Levels 3 - Installed in 2000 ISL - Initial Screening Level NA - Not Available Tier 1 - Tier 1 Risk-based Screening Criteria APPENDIX A LABORATORY ANALYTICAL REPORT ANALYTICAL REPORT November 02, 2024 One Atlas Sample Delivery Group:L1792015 Samples Received:10/24/2024 Project Number: Description:Rose Park Corner Mart Groundwater Sampling Event Report To:Jim Coletta 1775 South 4130 West, Ste A Salt Lake City, UT 84104 Entire Report Reviewed By: November 02, 2024 [Preliminary Report] Daphne Richards 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 mydata.pacelabs.com 1 Cp 2 Tc 3 Ss 4 Cn 5 Sr 6 Qc 7 Gl 8 Al 9 Sc ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE: One Atlas L1792015 11/02/24 16:42 1 of 20 November 04, 2024 Daphne Richards Project Manager ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE: One Atlas L1792015 11/04/24 08:39 1 of 20 TABLE OF CONTENTS Cp: Cover Page 1 Tc: Table of Contents 2 Ss: Sample Summary 3 Cn: Case Narrative 5 Sr: Sample Results 6 MW-1 L1792015-01 6 MW-2 L1792015-02 7 MW-4B L1792015-03 8 MW-5B L1792015-04 9 MW-6 L1792015-05 10 MW-7 L1792015-06 11 MW-8 L1792015-07 12 TRIP BLANK L1792015-08 13 Qc: Quality Control Summary 14 Volatile Organic Compounds (GC) by Method 8015D/GRO 14 Volatile Organic Compounds (GC/MS) by Method 8260B 15 Semi-Volatile Organic Compounds (GC) by Method 3511/8015 17 Gl: Glossary of Terms 18 Al: Accreditations & Locations 19 Sc: Sample Chain of Custody 20 1 Cp 2 Tc 3 Ss 4 Cn 5 Sr 6 Qc 7 Gl 8 Al 9 Sc ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE: One Atlas L1792015 11/02/24 16:42 2 of 20 ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE: One Atlas L1792015 11/04/24 08:39 2 of 20 SAMPLE SUMMARY Collected by Collected date/time Received date/time MW-1 L1792015-01 GW Olaf Questerert 10/23/24 12:00 10/24/24 08:00 Method Batch Dilution Preparation Analysis Analyst Location date/time date/time Volatile Organic Compounds (GC) by Method 8015D/GRO WG2391158 1 10/29/24 00:59 10/29/24 00:59 ACG Mt. Juliet, TN Volatile Organic Compounds (GC/MS) by Method 8260B WG2391132 1 10/29/24 00:44 10/29/24 00:44 KST Mt. Juliet, TN Semi-Volatile Organic Compounds (GC) by Method 3511/8015 WG2392884 1 10/31/24 22:25 11/01/24 17:17 TJD Mt. Juliet, TN Collected by Collected date/time Received date/time MW-2 L1792015-02 GW Olaf Questerert 10/23/24 13:00 10/24/24 08:00 Method Batch Dilution Preparation Analysis Analyst Location date/time date/time Volatile Organic Compounds (GC) by Method 8015D/GRO WG2391158 1 10/29/24 01:20 10/29/24 01:20 ACG Mt. Juliet, TN Volatile Organic Compounds (GC/MS) by Method 8260B WG2391132 1 10/29/24 01:03 10/29/24 01:03 KST Mt. Juliet, TN Semi-Volatile Organic Compounds (GC) by Method 3511/8015 WG2392884 1 10/31/24 22:25 11/01/24 17:37 TJD Mt. Juliet, TN Collected by Collected date/time Received date/time MW-4B L1792015-03 GW Olaf Questerert 10/23/24 12:30 10/24/24 08:00 Method Batch Dilution Preparation Analysis Analyst Location date/time date/time Volatile Organic Compounds (GC) by Method 8015D/GRO WG2391158 1 10/29/24 01:41 10/29/24 01:41 ACG Mt. Juliet, TN Volatile Organic Compounds (GC/MS) by Method 8260B WG2391181 1 10/29/24 11:08 10/29/24 11:08 KST Mt. Juliet, TN Semi-Volatile Organic Compounds (GC) by Method 3511/8015 WG2392884 1 10/31/24 22:25 11/01/24 17:57 TJD Mt. Juliet, TN Collected by Collected date/time Received date/time MW-5B L1792015-04 GW Olaf Questerert 10/23/24 12:45 10/24/24 08:00 Method Batch Dilution Preparation Analysis Analyst Location date/time date/time Volatile Organic Compounds (GC) by Method 8015D/GRO WG2391158 1 10/29/24 02:02 10/29/24 02:02 ACG Mt. Juliet, TN Volatile Organic Compounds (GC/MS) by Method 8260B WG2391181 1 10/29/24 11:27 10/29/24 11:27 KST Mt. Juliet, TN Semi-Volatile Organic Compounds (GC) by Method 3511/8015 WG2392884 1 10/31/24 22:25 11/01/24 18:17 TJD Mt. Juliet, TN Collected by Collected date/time Received date/time MW-6 L1792015-05 GW Olaf Questerert 10/23/24 12:15 10/24/24 08:00 Method Batch Dilution Preparation Analysis Analyst Location date/time date/time Volatile Organic Compounds (GC) by Method 8015D/GRO WG2391158 1 10/29/24 02:22 10/29/24 02:22 ACG Mt. Juliet, TN Volatile Organic Compounds (GC/MS) by Method 8260B WG2391181 1 10/29/24 11:47 10/29/24 11:47 KST Mt. Juliet, TN Semi-Volatile Organic Compounds (GC) by Method 3511/8015 WG2392884 1 10/31/24 22:25 11/01/24 18:38 TJD Mt. Juliet, TN Collected by Collected date/time Received date/time MW-7 L1792015-06 GW Olaf Questerert 10/23/24 13:15 10/24/24 08:00 Method Batch Dilution Preparation Analysis Analyst Location date/time date/time Volatile Organic Compounds (GC) by Method 8015D/GRO WG2391158 1 10/29/24 02:43 10/29/24 02:43 ACG Mt. Juliet, TN Volatile Organic Compounds (GC/MS) by Method 8260B WG2391181 1 10/29/24 12:07 10/29/24 12:07 KST Mt. Juliet, TN Semi-Volatile Organic Compounds (GC) by Method 3511/8015 WG2392884 1 10/31/24 22:25 11/01/24 18:58 TJD Mt. Juliet, TN 1 Cp 2 Tc 3 Ss 4 Cn 5 Sr 6 Qc 7 Gl 8 Al 9 Sc ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE: One Atlas L1792015 11/02/24 16:42 3 of 20 ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE: One Atlas L1792015 11/04/24 08:39 3 of 20 SAMPLE SUMMARY Collected by Collected date/time Received date/time MW-8 L1792015-07 GW Olaf Questerert 10/23/24 13:30 10/24/24 08:00 Method Batch Dilution Preparation Analysis Analyst Location date/time date/time Volatile Organic Compounds (GC) by Method 8015D/GRO WG2391158 1 10/29/24 03:04 10/29/24 03:04 ACG Mt. Juliet, TN Volatile Organic Compounds (GC/MS) by Method 8260B WG2391181 10 10/29/24 16:24 10/29/24 16:24 KST Mt. Juliet, TN Semi-Volatile Organic Compounds (GC) by Method 3511/8015 WG2392884 1 10/31/24 22:25 11/01/24 19:18 TJD Mt. Juliet, TN Collected by Collected date/time Received date/time TRIP BLANK L1792015-08 GW Olaf Questerert 10/23/24 00:00 10/24/24 08:00 Method Batch Dilution Preparation Analysis Analyst Location date/time date/time Volatile Organic Compounds (GC/MS) by Method 8260B WG2391181 1 10/29/24 10:29 10/29/24 10:29 KST Mt. Juliet, TN 1 Cp 2 Tc 3 Ss 4 Cn 5 Sr 6 Qc 7 Gl 8 Al 9 Sc ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE: One Atlas L1792015 11/02/24 16:42 4 of 20 ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE: One Atlas L1792015 11/04/24 08:39 4 of 20 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] Daphne Richards Project Manager Sample Delivery Group (SDG) Narrative pH outside of method requirement. Lab Sample ID Project Sample ID Method L1792015-07 MW-8 3511/8015 Analyzed from headspace vial. Lab Sample ID Project Sample ID Method L1792015-08 TRIP BLANK 8260B 1 Cp 2 Tc 3 Ss 4 Cn 5 Sr 6 Qc 7 Gl 8 Al 9 Sc ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE: One Atlas L1792015 11/02/24 16:42 5 of 20 Daphne Richards Project Manager ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE: One Atlas L1792015 11/04/24 08:39 5 of 20 SAMPLE RESULTS - 01 L1792015 MW-1 Collected date/time: 10/23/24 12:00 Volatile Organic Compounds (GC) by Method 8015D/GRO Result Qualifier MDL RDL Dilution Analysis Batch Analyte ug/l ug/l ug/l date / time TPH (GC/FID) Low Fraction 2150 31.4 100 1 10/29/2024 00:59 WG2391158 (S) a,a,a-Trifluorotoluene(FID)99.7 78.0-120 10/29/2024 00:59 WG2391158 Volatile Organic Compounds (GC/MS) by Method 8260B Result Qualifier MDL RDL Dilution Analysis Batch Analyte ug/l ug/l ug/l date / time Benzene 1.28 0.0941 1.00 1 10/29/2024 00:44 WG2391132 Toluene 0.716 J 0.278 1.00 1 10/29/2024 00:44 WG2391132 Ethylbenzene 0.858 J 0.137 1.00 1 10/29/2024 00:44 WG2391132 Total Xylenes 7.62 0.174 3.00 1 10/29/2024 00:44 WG2391132 Methyl tert-butyl ether 18.4 0.101 1.00 1 10/29/2024 00:44 WG2391132 Naphthalene 1.81 J 1.00 5.00 1 10/29/2024 00:44 WG2391132 (S) Toluene-d8 98.3 80.0-120 10/29/2024 00:44 WG2391132 (S) 4-Bromofluorobenzene 99.8 77.0-126 10/29/2024 00:44 WG2391132 (S) 1,2-Dichloroethane-d4 79.1 70.0-130 10/29/2024 00:44 WG2391132 Semi-Volatile Organic Compounds (GC) by Method 3511/8015 Result Qualifier MDL RDL Dilution Analysis Batch Analyte ug/l ug/l ug/l date / time TPH (GC/FID) High Fraction 728 24.7 100 1 11/01/2024 17:17 WG2392884 (S) o-Terphenyl 128 52.0-156 11/01/2024 17:17 WG2392884 1 Cp 2 Tc 3 Ss 4 Cn 5 Sr 6 Qc 7 Gl 8 Al 9 Sc ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE: One Atlas L1792015 11/02/24 16:42 6 of 20 ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE: One Atlas L1792015 11/04/24 08:39 6 of 20 SAMPLE RESULTS - 02 L1792015 MW-2 Collected date/time: 10/23/24 13:00 Volatile Organic Compounds (GC) by Method 8015D/GRO Result Qualifier MDL RDL Dilution Analysis Batch Analyte ug/l ug/l ug/l date / time TPH (GC/FID) Low Fraction 576 31.4 100 1 10/29/2024 01:20 WG2391158 (S) a,a,a-Trifluorotoluene(FID)84.9 78.0-120 10/29/2024 01:20 WG2391158 Volatile Organic Compounds (GC/MS) by Method 8260B Result Qualifier MDL RDL Dilution Analysis Batch Analyte ug/l ug/l ug/l date / time Benzene 0.748 J 0.0941 1.00 1 10/29/2024 01:03 WG2391132 Toluene 0.545 J 0.278 1.00 1 10/29/2024 01:03 WG2391132 Ethylbenzene 0.323 J 0.137 1.00 1 10/29/2024 01:03 WG2391132 Total Xylenes 0.779 J 0.174 3.00 1 10/29/2024 01:03 WG2391132 Methyl tert-butyl ether U 0.101 1.00 1 10/29/2024 01:03 WG2391132 Naphthalene 1.09 J 1.00 5.00 1 10/29/2024 01:03 WG2391132 (S) Toluene-d8 95.7 80.0-120 10/29/2024 01:03 WG2391132 (S) 4-Bromofluorobenzene 95.9 77.0-126 10/29/2024 01:03 WG2391132 (S) 1,2-Dichloroethane-d4 76.3 70.0-130 10/29/2024 01:03 WG2391132 Semi-Volatile Organic Compounds (GC) by Method 3511/8015 Result Qualifier MDL RDL Dilution Analysis Batch Analyte ug/l ug/l ug/l date / time TPH (GC/FID) High Fraction 1640 24.7 100 1 11/01/2024 17:37 WG2392884 (S) o-Terphenyl 121 52.0-156 11/01/2024 17:37 WG2392884 1 Cp 2 Tc 3 Ss 4 Cn 5 Sr 6 Qc 7 Gl 8 Al 9 Sc ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE: One Atlas L1792015 11/02/24 16:42 7 of 20 ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE: One Atlas L1792015 11/04/24 08:39 7 of 20 SAMPLE RESULTS - 03 L1792015 MW-4B Collected date/time: 10/23/24 12:30 Volatile Organic Compounds (GC) by Method 8015D/GRO Result Qualifier MDL RDL Dilution Analysis Batch Analyte ug/l ug/l ug/l date / time TPH (GC/FID) Low Fraction 1250 31.4 100 1 10/29/2024 01:41 WG2391158 (S) a,a,a-Trifluorotoluene(FID)92.4 78.0-120 10/29/2024 01:41 WG2391158 Volatile Organic Compounds (GC/MS) by Method 8260B Result Qualifier MDL RDL Dilution Analysis Batch Analyte ug/l ug/l ug/l date / time Benzene 0.489 J 0.0941 1.00 1 10/29/2024 11:08 WG2391181 Toluene 1.23 0.278 1.00 1 10/29/2024 11:08 WG2391181 Ethylbenzene 0.930 J 0.137 1.00 1 10/29/2024 11:08 WG2391181 Total Xylenes 7.69 0.174 3.00 1 10/29/2024 11:08 WG2391181 Methyl tert-butyl ether U 0.101 1.00 1 10/29/2024 11:08 WG2391181 Naphthalene 12.3 1.00 5.00 1 10/29/2024 11:08 WG2391181 (S) Toluene-d8 102 80.0-120 10/29/2024 11:08 WG2391181 (S) 4-Bromofluorobenzene 101 77.0-126 10/29/2024 11:08 WG2391181 (S) 1,2-Dichloroethane-d4 77.3 70.0-130 10/29/2024 11:08 WG2391181 Semi-Volatile Organic Compounds (GC) by Method 3511/8015 Result Qualifier MDL RDL Dilution Analysis Batch Analyte ug/l ug/l ug/l date / time TPH (GC/FID) High Fraction 415 24.7 100 1 11/01/2024 17:57 WG2392884 (S) o-Terphenyl 135 52.0-156 11/01/2024 17:57 WG2392884 1 Cp 2 Tc 3 Ss 4 Cn 5 Sr 6 Qc 7 Gl 8 Al 9 Sc ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE: One Atlas L1792015 11/02/24 16:42 8 of 20 ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE: One Atlas L1792015 11/04/24 08:39 8 of 20 SAMPLE RESULTS - 04 L1792015 MW-5B Collected date/time: 10/23/24 12:45 Volatile Organic Compounds (GC) by Method 8015D/GRO Result Qualifier MDL RDL Dilution Analysis Batch Analyte ug/l ug/l ug/l date / time TPH (GC/FID) Low Fraction 35.0 B J 31.4 100 1 10/29/2024 02:02 WG2391158 (S) a,a,a-Trifluorotoluene(FID)86.5 78.0-120 10/29/2024 02:02 WG2391158 Volatile Organic Compounds (GC/MS) by Method 8260B Result Qualifier MDL RDL Dilution Analysis Batch Analyte ug/l ug/l ug/l date / time Benzene U 0.0941 1.00 1 10/29/2024 11:27 WG2391181 Toluene U 0.278 1.00 1 10/29/2024 11:27 WG2391181 Ethylbenzene U 0.137 1.00 1 10/29/2024 11:27 WG2391181 Total Xylenes U 0.174 3.00 1 10/29/2024 11:27 WG2391181 Methyl tert-butyl ether U 0.101 1.00 1 10/29/2024 11:27 WG2391181 Naphthalene U 1.00 5.00 1 10/29/2024 11:27 WG2391181 (S) Toluene-d8 104 80.0-120 10/29/2024 11:27 WG2391181 (S) 4-Bromofluorobenzene 101 77.0-126 10/29/2024 11:27 WG2391181 (S) 1,2-Dichloroethane-d4 77.1 70.0-130 10/29/2024 11:27 WG2391181 Semi-Volatile Organic Compounds (GC) by Method 3511/8015 Result Qualifier MDL RDL Dilution Analysis Batch Analyte ug/l ug/l ug/l date / time TPH (GC/FID) High Fraction 75.5 J 24.7 100 1 11/01/2024 18:17 WG2392884 (S) o-Terphenyl 139 52.0-156 11/01/2024 18:17 WG2392884 1 Cp 2 Tc 3 Ss 4 Cn 5 Sr 6 Qc 7 Gl 8 Al 9 Sc ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE: One Atlas L1792015 11/02/24 16:42 9 of 20 ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE: One Atlas L1792015 11/04/24 08:39 9 of 20 SAMPLE RESULTS - 05 L1792015 MW-6 Collected date/time: 10/23/24 12:15 Volatile Organic Compounds (GC) by Method 8015D/GRO Result Qualifier MDL RDL Dilution Analysis Batch Analyte ug/l ug/l ug/l date / time TPH (GC/FID) Low Fraction 849 31.4 100 1 10/29/2024 02:22 WG2391158 (S) a,a,a-Trifluorotoluene(FID)86.7 78.0-120 10/29/2024 02:22 WG2391158 Volatile Organic Compounds (GC/MS) by Method 8260B Result Qualifier MDL RDL Dilution Analysis Batch Analyte ug/l ug/l ug/l date / time Benzene 0.274 J 0.0941 1.00 1 10/29/2024 11:47 WG2391181 Toluene 0.432 J 0.278 1.00 1 10/29/2024 11:47 WG2391181 Ethylbenzene U 0.137 1.00 1 10/29/2024 11:47 WG2391181 Total Xylenes U 0.174 3.00 1 10/29/2024 11:47 WG2391181 Methyl tert-butyl ether U 0.101 1.00 1 10/29/2024 11:47 WG2391181 Naphthalene U 1.00 5.00 1 10/29/2024 11:47 WG2391181 (S) Toluene-d8 105 80.0-120 10/29/2024 11:47 WG2391181 (S) 4-Bromofluorobenzene 98.9 77.0-126 10/29/2024 11:47 WG2391181 (S) 1,2-Dichloroethane-d4 75.9 70.0-130 10/29/2024 11:47 WG2391181 Semi-Volatile Organic Compounds (GC) by Method 3511/8015 Result Qualifier MDL RDL Dilution Analysis Batch Analyte ug/l ug/l ug/l date / time TPH (GC/FID) High Fraction 150 24.7 100 1 11/01/2024 18:38 WG2392884 (S) o-Terphenyl 129 52.0-156 11/01/2024 18:38 WG2392884 1 Cp 2 Tc 3 Ss 4 Cn 5 Sr 6 Qc 7 Gl 8 Al 9 Sc ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE: One Atlas L1792015 11/02/24 16:42 10 of 20 ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE: One Atlas L1792015 11/04/24 08:39 10 of 20 SAMPLE RESULTS - 06 L1792015 MW-7 Collected date/time: 10/23/24 13:15 Volatile Organic Compounds (GC) by Method 8015D/GRO Result Qualifier MDL RDL Dilution Analysis Batch Analyte ug/l ug/l ug/l date / time TPH (GC/FID) Low Fraction 78.5 B J 31.4 100 1 10/29/2024 02:43 WG2391158 (S) a,a,a-Trifluorotoluene(FID)86.5 78.0-120 10/29/2024 02:43 WG2391158 Volatile Organic Compounds (GC/MS) by Method 8260B Result Qualifier MDL RDL Dilution Analysis Batch Analyte ug/l ug/l ug/l date / time Benzene U 0.0941 1.00 1 10/29/2024 12:07 WG2391181 Toluene U 0.278 1.00 1 10/29/2024 12:07 WG2391181 Ethylbenzene U 0.137 1.00 1 10/29/2024 12:07 WG2391181 Total Xylenes U 0.174 3.00 1 10/29/2024 12:07 WG2391181 Methyl tert-butyl ether 2.08 0.101 1.00 1 10/29/2024 12:07 WG2391181 Naphthalene U 1.00 5.00 1 10/29/2024 12:07 WG2391181 (S) Toluene-d8 102 80.0-120 10/29/2024 12:07 WG2391181 (S) 4-Bromofluorobenzene 103 77.0-126 10/29/2024 12:07 WG2391181 (S) 1,2-Dichloroethane-d4 80.1 70.0-130 10/29/2024 12:07 WG2391181 Semi-Volatile Organic Compounds (GC) by Method 3511/8015 Result Qualifier MDL RDL Dilution Analysis Batch Analyte ug/l ug/l ug/l date / time TPH (GC/FID) High Fraction 369 24.7 100 1 11/01/2024 18:58 WG2392884 (S) o-Terphenyl 129 52.0-156 11/01/2024 18:58 WG2392884 1 Cp 2 Tc 3 Ss 4 Cn 5 Sr 6 Qc 7 Gl 8 Al 9 Sc ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE: One Atlas L1792015 11/02/24 16:42 11 of 20 ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE: One Atlas L1792015 11/04/24 08:39 11 of 20 SAMPLE RESULTS - 07 L1792015 MW-8 Collected date/time: 10/23/24 13:30 Volatile Organic Compounds (GC) by Method 8015D/GRO Result Qualifier MDL RDL Dilution Analysis Batch Analyte ug/l ug/l ug/l date / time TPH (GC/FID) Low Fraction 3210 31.4 100 1 10/29/2024 03:04 WG2391158 (S) a,a,a-Trifluorotoluene(FID)102 78.0-120 10/29/2024 03:04 WG2391158 Volatile Organic Compounds (GC/MS) by Method 8260B Result Qualifier MDL RDL Dilution Analysis Batch Analyte ug/l ug/l ug/l date / time Benzene 326 0.941 10.0 10 10/29/2024 16:24 WG2391181 Toluene 9.10 J 2.78 10.0 10 10/29/2024 16:24 WG2391181 Ethylbenzene 16.8 1.37 10.0 10 10/29/2024 16:24 WG2391181 Total Xylenes 29.5 J 1.74 30.0 10 10/29/2024 16:24 WG2391181 Methyl tert-butyl ether U 1.01 10.0 10 10/29/2024 16:24 WG2391181 Naphthalene 167 10.0 50.0 10 10/29/2024 16:24 WG2391181 (S) Toluene-d8 104 80.0-120 10/29/2024 16:24 WG2391181 (S) 4-Bromofluorobenzene 106 77.0-126 10/29/2024 16:24 WG2391181 (S) 1,2-Dichloroethane-d4 78.4 70.0-130 10/29/2024 16:24 WG2391181 Semi-Volatile Organic Compounds (GC) by Method 3511/8015 Result Qualifier MDL RDL Dilution Analysis Batch Analyte ug/l ug/l ug/l date / time TPH (GC/FID) High Fraction 3580 24.7 100 1 11/01/2024 19:18 WG2392884 (S) o-Terphenyl 115 52.0-156 11/01/2024 19:18 WG2392884 1 Cp 2 Tc 3 Ss 4 Cn 5 Sr 6 Qc 7 Gl 8 Al 9 Sc ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE: One Atlas L1792015 11/02/24 16:42 12 of 20 ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE: One Atlas L1792015 11/04/24 08:39 12 of 20 SAMPLE RESULTS - 08 L1792015 TRIP BLANK Collected date/time: 10/23/24 00:00 Volatile Organic Compounds (GC/MS) by Method 8260B Result Qualifier MDL RDL Dilution Analysis Batch Analyte ug/l ug/l ug/l date / time Benzene U 0.0941 1.00 1 10/29/2024 10:29 WG2391181 Toluene U 0.278 1.00 1 10/29/2024 10:29 WG2391181 Ethylbenzene U 0.137 1.00 1 10/29/2024 10:29 WG2391181 Total Xylenes U 0.174 3.00 1 10/29/2024 10:29 WG2391181 Methyl tert-butyl ether U 0.101 1.00 1 10/29/2024 10:29 WG2391181 Naphthalene U 1.00 5.00 1 10/29/2024 10:29 WG2391181 (S) Toluene-d8 104 80.0-120 10/29/2024 10:29 WG2391181 (S) 4-Bromofluorobenzene 98.8 77.0-126 10/29/2024 10:29 WG2391181 (S) 1,2-Dichloroethane-d4 75.9 70.0-130 10/29/2024 10:29 WG2391181 1 Cp 2 Tc 3 Ss 4 Cn 5 Sr 6 Qc 7 Gl 8 Al 9 Sc ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE: One Atlas L1792015 11/02/24 16:42 13 of 20 ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE: One Atlas L1792015 11/04/24 08:39 13 of 20 QUALITY CONTROL SUMMARYWG2391158 Volatile Organic Compounds (GC) by Method 8015D/GRO L1792015-01,02,03,04,05,06,07 Method Blank (MB) (MB) R4139014-4 10/28/24 22:18 MB Result MB Qualifier MB MDL MB RDL Analyte ug/l ug/l ug/l TPH (GC/FID) Low Fraction 39.4 J 31.4 100 (S) a,a,a-Trifluorotoluene(FID)85.9 78.0-120 Laboratory Control Sample (LCS) • Laboratory Control Sample Duplicate (LCSD) (LCS) R4139014-2 10/28/24 20:41 • (LCSD) R4139014-3 10/28/24 21:37 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 %%%%% TPH (GC/FID) Low Fraction 5000 4610 4590 92.2 91.8 72.0-127 0.435 20 (S) a,a,a-Trifluorotoluene(FID) 91.2 90.8 78.0-120 1 Cp 2 Tc 3 Ss 4 Cn 5 Sr 6 Qc 7 Gl 8 Al 9 Sc ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE: One Atlas L1792015 11/02/24 16:42 14 of 20 ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE: One Atlas L1792015 11/04/24 08:39 14 of 20 QUALITY CONTROL SUMMARYWG2391132 Volatile Organic Compounds (GC/MS) by Method 8260B L1792015-01,02 Method Blank (MB) (MB) R4140191-2 10/28/24 19:36 MB Result MB Qualifier MB MDL MB RDL Analyte ug/l ug/l ug/l Benzene U 0.0941 1.00 Toluene U 0.278 1.00 Ethylbenzene U 0.137 1.00 Total Xylenes U 0.174 3.00 Methyl tert-butyl ether U 0.101 1.00 Naphthalene U 1.00 5.00 (S) Toluene-d8 105 80.0-120 (S) 4-Bromofluorobenzene 102 77.0-126 (S) 1,2-Dichloroethane-d4 77.4 70.0-130 Laboratory Control Sample (LCS) (LCS) R4140191-1 10/28/24 18:56 Spike Amount LCS Result LCS Rec.Rec. Limits LCS Qualifier Analyte ug/l ug/l %% Benzene 5.00 4.93 98.6 70.0-123 Toluene 5.00 5.47 109 79.0-120 Ethylbenzene 5.00 5.81 116 79.0-123 Total Xylenes 15.0 17.4 116 79.0-123 Methyl tert-butyl ether 5.00 4.82 96.4 68.0-125 Naphthalene 5.00 5.22 104 54.0-135 (S) Toluene-d8 104 80.0-120 (S) 4-Bromofluorobenzene 102 77.0-126 (S) 1,2-Dichloroethane-d4 79.3 70.0-130 1 Cp 2 Tc 3 Ss 4 Cn 5 Sr 6 Qc 7 Gl 8 Al 9 Sc ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE: One Atlas L1792015 11/02/24 16:42 15 of 20 ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE: One Atlas L1792015 11/04/24 08:39 15 of 20 QUALITY CONTROL SUMMARYWG2391181 Volatile Organic Compounds (GC/MS) by Method 8260B L1792015-03,04,05,06,07,08 Method Blank (MB) (MB) R4140268-3 10/29/24 09:58 MB Result MB Qualifier MB MDL MB RDL Analyte ug/l ug/l ug/l Benzene U 0.0941 1.00 Toluene U 0.278 1.00 Ethylbenzene U 0.137 1.00 Total Xylenes U 0.174 3.00 Methyl tert-butyl ether U 0.101 1.00 Naphthalene U 1.00 5.00 (S) Toluene-d8 104 80.0-120 (S) 4-Bromofluorobenzene 100 77.0-126 (S) 1,2-Dichloroethane-d4 78.8 70.0-130 Laboratory Control Sample (LCS) • Laboratory Control Sample Duplicate (LCSD) (LCS) R4140268-1 10/29/24 08:59 • (LCSD) R4140268-2 10/29/24 09:19 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 %%%%% Benzene 5.00 4.66 4.71 93.2 94.2 70.0-123 1.07 20 Toluene 5.00 5.12 5.25 102 105 79.0-120 2.51 20 Ethylbenzene 5.00 5.55 5.56 111 111 79.0-123 0.180 20 Total Xylenes 15.0 16.4 16.9 109 113 79.0-123 3.00 20 Methyl tert-butyl ether 5.00 4.83 4.71 96.6 94.2 68.0-125 2.52 20 Naphthalene 5.00 5.34 5.26 107 105 54.0-135 1.51 20 (S) Toluene-d8 101 105 80.0-120 (S) 4-Bromofluorobenzene 101 104 77.0-126 (S) 1,2-Dichloroethane-d4 79.1 77.2 70.0-130 L1792047-03 Original Sample (OS) • Matrix Spike (MS) • Matrix Spike Duplicate (MSD) (OS) L1792047-03 10/29/24 13:06 • (MS) R4140268-4 10/29/24 17:04 • (MSD) R4140268-5 10/29/24 17:23 Spike Amount Original Result MS Result MSD Result MS Rec.MSD Rec.Dilution Rec. Limits MS Qualifier MSD Qualifier RPD RPD Limits Analyte ug/l ug/l ug/l ug/l %%%%% Benzene 5.00 2.90 8.23 8.14 107 105 1 17.0-158 1.10 27 Toluene 5.00 U 6.27 6.08 125 122 1 26.0-154 3.08 28 Ethylbenzene 5.00 0.385 7.04 6.56 133 123 1 30.0-155 7.06 27 Total Xylenes 15.0 0.312 20.0 19.7 131 129 1 29.0-154 1.51 28 Methyl tert-butyl ether 5.00 0.512 6.19 6.20 114 114 1 28.0-150 0.161 29 Naphthalene 5.00 10.1 7.70 7.68 0.000 0.000 1 12.0-156 J6 J6 0.260 35 (S) Toluene-d8 103 101 80.0-120 (S) 4-Bromofluorobenzene 101 102 77.0-126 (S) 1,2-Dichloroethane-d4 78.8 79.8 70.0-130 1 Cp 2 Tc 3 Ss 4 Cn 5 Sr 6 Qc 7 Gl 8 Al 9 Sc ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE: One Atlas L1792015 11/02/24 16:42 16 of 20 ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE: One Atlas L1792015 11/04/24 08:39 16 of 20 QUALITY CONTROL SUMMARYWG2392884 Semi-Volatile Organic Compounds (GC) by Method 3511/8015 L1792015-01,02,03,04,05,06,07 Method Blank (MB) (MB) R4141085-1 11/01/24 14:14 MB Result MB Qualifier MB MDL MB RDL Analyte ug/l ug/l ug/l TPH (GC/FID) High Fraction U 24.7 100 (S) o-Terphenyl 127 52.0-156 Laboratory Control Sample (LCS) • Laboratory Control Sample Duplicate (LCSD) (LCS) R4141085-2 11/01/24 14:34 • (LCSD) R4141085-3 11/01/24 14:55 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 %%%%% TPH (GC/FID) High Fraction 1500 1510 1550 101 103 50.0-150 2.61 20 (S) o-Terphenyl 49.8 46.2 52.0-156 J2 J2 1 Cp 2 Tc 3 Ss 4 Cn 5 Sr 6 Qc 7 Gl 8 Al 9 Sc ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE: One Atlas L1792015 11/02/24 16:42 17 of 20 ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE: One Atlas L1792015 11/04/24 08:39 17 of 20 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. Original Sample The non-spiked sample in the prep batch used to determine the Relative Percent Difference (RPD) from a quality control sample. The Original Sample may not be included within the reported SDG. 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 B The same analyte is found in the associated blank. J The identification of the analyte is acceptable; the reported value is an estimate. J2 Surrogate recovery limits have been exceeded; values are outside lower control limits. J6 The sample matrix interfered with the ability to make any accurate determination; spike value is low. 1 Cp 2 Tc 3 Ss 4 Cn 5 Sr 6 Qc 7 Gl 8 Al 9 Sc ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE: One Atlas L1792015 11/02/24 16:42 18 of 20 ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE: One Atlas L1792015 11/04/24 08:39 18 of 20 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 2 Tc 3 Ss 4 Cn 5 Sr 6 Qc 7 Gl 8 Al 9 Sc ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE: One Atlas L1792015 11/02/24 16:42 19 of 20 ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE: One Atlas L1792015 11/04/24 08:39 19 of 20