Loading...
HomeMy WebLinkAboutDERR-2025-000471 Palmer Tire GW Monitoring Report Page 1 ATLAS 358 South 700 East, B518 Salt Lake City UT 84102 Office: 801.935.4917 www.oneatlas.com January 14, 2025 Mr. Mark Crim 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 – December 2024 Palmer Tire 395 South 200 East Roosevelt, Utah Facility ID #9000371 UST Release Site MLS Work Assignment MLS-23 UDEQ Technical Services Contract #216364 Dear Mr. Crim: Please find attached a copy of the December 2024 Groundwater Monitoring Report for the above referenced site. INTRODUCTION The work conducted on December 4, 2024, was performed on behalf of the Utah Department Environmental Quality, Division of Environmental Response and Remediation (DERR), under Work Assignment MLS-23. FIELD PARAMETER WELL PURGING PROCEDURES AND CHEMICAL ANALYSIS The approved work plan included gauging MW -10, and sampling monitoring wells MW -11, MW - 14, MW -15, MW -17, MW-18, MW -19, MW -21, and MW -22. However, monitoring well MW -17 contained 1.90 ft. of free product. The well with free product present was not sampled. During the prior sampling event conducted in September 2024 free product was measured at 2.25 ft. in MW -17. Free product first appeared in MW -18 in February 2020 and was consistently present until November of 2023, with the exception of the sampling event conducted in September 2022. Free product was not detected in MW -18 during the December 2024 sampling event. Approximately 0.01 ft. of free product was measured in MW -10 during the December 2024 sampling event. A site map depicting the groundwater monitoring well locations and surrounding area features is presented as Figure 1. Prior to well purging, groundwater depths were measured in each well using an electronic water level/free product interface probe. The water level/free product interface probe was decontaminated between each well with an Alconox detergent wash and tap water rinse. Following field parameter measurements, the monitoring wells not containing free product were purged using new, factory-sealed disposable PVC bailers. All the monitoring wells sampled were purged three well casing volumes or until dry. Groundwater removed from the wells was poured on the asphalt surface and allowed to evaporate. After the purging process, the wells were allowed to recharge to within 95 percent of the pre-purge water level before groundwater Palmer Tire GW Monitoring Report Page 2 ATLAS samples were collected. 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. A field blank sample was also collected during the sampling effort and submitted for laboratory analysis. A laboratory prepared trip blank was included in the cooler and submitted for laboratory analysis. The laboratory report and chain of custody are presented in Appendix A. Field parameter measurements and groundwater laboratory results are presented in Table 1. Groundwater elevation data collected from wells indicates groundwater flows to the south- southwest at a gradient of 0.103 ft/ft between MW-22 and MW -15. The groundwater gradient map is presented as Figure 2. The laboratory results for the samples collected in December 2024 indicate that the benzene Tier I Screening Level was exceeded in MW -21 (0.924 mg/L). Benzene concentrations were also detected in MW -11 (0.141 mg/L), MW -14 (0.00827 mg/L), MW -15 (0.0634 mg/L), MW -18 (0.000155 mg/L), MW -19 (0.000486 mg/L), and MW-22 (0.00197 mg/L). No other BTEXN constituents were measured above their respective Tier I Screening Levels in any of the other wells sampled. The benzene isoconcentration map is presented as Figure 3. The laboratory results indicated no detection of TPH-GRO above the Tier I Screening Level of 10 mg/L in any of the monitoring wells sampled. TPH-GRO was detected in MW -11 (0.428 mg/L), MW -14 (8.880 mg/L), MW -15 (0.0718 mg/L), MW -18 (0.415 mg/L), MW -19 (0.456 mg/L), MW -21 (1.400 mg/L), and MW -22 (0.0379 mg/L). The TPH-GRO isoconcentration map is presented as Figure 4. TPH-DRO was measured above the Tier I Screening Level of 10 mg/L in MW -15 (18.400 mg/L). TPH-DRO was also detected in MW -11 (9.940 mg/L), MW -14 (9.200 mg/L), MW -18 (4.190 mg/L), MW -19 (1.130 mg/L), MW -21 (9.220 mg/L), and MW -22 (3.900 mg/L). The TPH-DRO isoconcentration map is presented as Figure 5. A field blank and trip blank were submitted with the primary samples for Quality Assurance/Quality Control (QA/QC). The field blank sample was collected/prepared in the field from a new, un-opened 1-gallon container of distilled water purchased from a grocery store. The trip blank was prepared by the laboratory and shipped along with the primary samples. The laboratory analysis of the trip blank and field blank indicated no detection of the MBTEXN constituents above the laboratory reporting limits; however, TPH-DRO was measured at a concentration of 0.0958 mg/L in the field blank sample. The TPH-DRO concentration measured in the field blank was lower than the laboratory reporting limit, but above the method detection limit. The laboratory flagged this data “B” – The same analyte is found in the associated blank, and “J” – The identification of the analyte is acceptable, the reported value is an estimate. Based upon review of the QA/QC results, it is likely that the field blank sample may have been compromised in the laboratory CONCLUSIONS AND RECOMMENDATIONS Free product was measured in MW -10 and MW -17 during the December 2024 groundwater monitoring event. The data collected during the monitoring event indicate the presence of benzene above the Tier I Screening Level in MW -21 and TPH-DRO above the Tier I Screening Level in MW -15. No other exceedances of Tier I Screening Levels were noted in any of the Palmer Tire GW Monitoring Report Page 3 ATLAS other wells sampled. Based upon the December 2024 laboratory results and historical groundwater monitoring data collected at the site, Atlas recommends the quarterly groundwater monitoring program continue at the site. The December 2024 sampling round was the third groundwater monitoring event under Work Assignment MLS-23. The next groundwater monitoring event is scheduled for March 2025. 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) 935-4917. Sincerely, Atlas Technical Consultants LLC Olaf Questereit James J. Coletta, P.G. Staff Scientist Branch Manager GS #1326 Utah Certified UST Consultant UST CC #0150 OQ/JC FIGURES 20 0 E A S T MOVIE GALLERY (LCL OIL) PALMER TIRE ELECTRICAL SEEP RESIDENTIAL RESIDENTIAL RESIDENTIAL DISPENSOR ISLANDS ELECTRICAL LINE SEEP AREA FENCE G G G G G G G G G G G G G NATURAL GAS ST E E P S L O P E STEEP SLOPE TP TP TELEPHONE POLE W W W W W W W S WATER LINE (Approximate Depth = 5') SEWER LINE (Approximate Depth = 8') US H W Y 4 0 INSTALLED JANUARY 2008 MONITORING WELL LOCATION INSTALLED OCTOBER 2008 IRRIGATION WATER LINE 271EM00878PROJECT NUMBER:DATE:10-26-21 1 FIGURE DRAWN BY:JCAPPROVED BY:BIX W W W W W W W W W S S W W W W WESTERN PETROLEUM W W W W W W W W W W S S S S S S MONITORING WELL LOCATION (02-14) W W W W W W G G G G G G G G G NEW MONITORING WELL LOCATION (05-17) W W W W W W ABANDONED OR DESTROYED WELL 358 South 700 East, B518 Salt Lake City, Utah 84102 801-935-4917 20 0 E A S T MOVIE GALLERY (LCL OIL) PALMER TIRE ELECTRICAL SEEP RESIDENTIAL RESIDENTIAL RESIDENTIAL DISPENSOR ISLANDS ELECTRICAL LINE SEEP AREAFENCE G G G G G G G G G G G G G NATURAL GAS ST E E P S L O P E STEEP SLOPE TP TP TELEPHONE POLE W W W W W W W S WATER LINE (Approximate Depth = 5') SEWER LINE (Approximate Depth = 8') US H W Y 4 0 INSTALLED JANUARY 2008 MONITORING WELL LOCATION INSTALLED OCTOBER 2008 IRRIGATION WATER LINE 271EM00878PROJECT NUMBER:DATE:01-07-25 2 FIGURE DRAWN BY:JCAPPROVED BY:JC W W W W W W W W W S S W W W W WESTERN PETROLEUM W W W W W W W W W W S S S S S MONITORING WELL LOCATION (02-14) W W W W W W G G G G G G G G G NEW MONITORING WELL LOCATION (05-17) W W W W W W ABANDONED OR DESTROYED WELL MONITORING WELL LOCATION WITH GROUNDWATER ELEVATION IN FEET ESTIMATED GROUNDWATER CONTOUR LINE MEASURED IN FEET NOT LOCATED 358 South 700 East, B518 Salt Lake City, Utah 84102 801-935-4917 20 0 E A S T MOVIE GALLERY (LCL OIL) PALMER TIRE ELECTRICAL SEEP RESIDENTIAL RESIDENTIAL RESIDENTIAL DISPENSOR ISLANDS ELECTRICAL LINE SEEP AREAFENCE G G G G G G G G G G G G G NATURAL GAS ST E E P S L O P E STEEP SLOPE TP TP TELEPHONE POLE W W W W W W W S WATER LINE (Approximate Depth = 5') SEWER LINE (Approximate Depth = 8') US H W Y 4 0 IRRIGATION WATER LINE 271EM00878PROJECT NUMBER:DATE:1/07/25 3 FIGURE DRAWN BY:JCAPPROVED BY:JC W W W W W W W W W S S W W W W WESTERN PETROLEUM W W W W W W W W W W S S S S S W W W W W W G G G G G G G G G W W W W W W MONITORING WELL LOCATION WITH BENZENE CONCENTRATION MEASURED IN mg/L ESTIMATED BENZENE ISOCONCENTRATION LINE MEASURED IN mg/L NOT SAMPLED PRODUCT PRESENT INSTALLED JANUARY 2008 MONITORING WELL LOCATION INSTALLED OCTOBER 2008 MONITORING WELL LOCATION (02-14) NEW MONITORING WELL LOCATION (05-17) ABANDONED OR DESTROYED WELL 358 South 700 East, B518 Salt Lake City, Utah 84102 801-935-4917 20 0 E A S T MOVIE GALLERY (LCL OIL) PALMER TIRE ELECTRICAL SEEP RESIDENTIAL RE S I D E N T I A L RESIDENTIAL DISPENSOR ISLANDS ELECTRICAL LINE SEEP AREA FENCE G G G G G G G G G G G G G NATURAL GAS ST E E P S L O P E STEEP SLOPE TP TP TELEPHONE POLE W W W W W W W S WATER LINE (Approximate Depth = 5') SEWER LINE (Approximate Depth = 8') US H W Y 4 0 INSTALLED JANUARY 2008 MONITORING WELL LOCATION INSTALLED OCTOBER 2008 IRRIGATION WATER LINE 271EM00878PROJECT NUMBER:DATE:1-9-25 4 FIGURE DRAWN BY:JCAPPROVED BY:JC W W W W W W W W W S S W W W W WESTERN PETROLEUM W W W W W W W W W W S S S S S MONITORING WELL LOCATION (02-14) W W W W W W G G G G G G G G G NEW MONITORING WELL LOCATION (05-17) W W W W W W MONITORING WELL LOCATION WITH TPH-GRO CONCENTRATION MEASURED IN mg/L ESTIMATED TPH-GRO ISOCONCENTRATION LINE MEASURED IN mg/L NOT SAMPLED ABANDONED OR DESTROYED WELL 358 South 700 East, B518 Salt Lake City, Utah 84102 801-935-4917 20 0 E A S T MOVIE GALLERY (LCL OIL) PALMER TIRE ELECTRICAL SEEP RESIDENTIAL RE S I D E N T I A L RESIDENTIAL DISPENSOR ISLANDS ELECTRICAL LINE SEEP AREA FENCE G G G G G G G G G G G G G NATURAL GAS ST E E P S L O P E STEEP SLOPE TP TP TELEPHONE POLE W W W W W W W S WATER LINE (Approximate Depth = 5') SEWER LINE (Approximate Depth = 8') US H W Y 4 0 INSTALLED JANUARY 2008 MONITORING WELL LOCATION INSTALLED OCTOBER 2008 IRRIGATION WATER LINE 271EM00878PROJECT NUMBER:DATE:1-9-25 5 FIGURE DRAWN BY:JCAPPROVED BY:JC W W W W W W W W W S S W W W W WESTERN PETROLEUM W W W W W W W W W W S S S S S MONITORING WELL LOCATION (02-14) W W W W W W G G G G G G G G G NEW MONITORING WELL LOCATION (05-17) W W W W W W ABANDONED OR DESTROYED WELL MONITORING WELL LOCATION WITH TPH-DRO CONCENTRATION MEASURED IN mg/L ESTIMATED TPH-DRO ISOCONCENTRATION LINE MEASURED IN mg/L NOT SAMPLED 358 South 700 East, B518 Salt Lake City, Utah 84102 801-935-4917 TABLES 1 of 7 TABLE 1 GROUNDWATER ANALYTICAL AND ELEVATION DATA SUMMARY PALMER TIRE 395 SOUTH 200 EAST ROOSEVELT, UTAH SAMPLE ETHYL-NAPH-ORGANIC LOCATION DATE BENZENE BENZENE MTBE THALENE TOLUENE XYLENES TPH-GRO TPH-DRO LEAD LEAD DTW FPT WTE TOC (ft.)MM/DD/YY (mg/L)(mg/L)(mg/L)(mg/L)(mg/L)(mg/L)(mg/L)(mg/L)(mg/L)(mg/L)(feet)(feet)(feet) Initial Screening Levels 0.005 0.7 0.2 0.7 1.0 10 1.0 1.0 NE NE RBCA Tier 1 Screening 0.3 4.0 0.2 0.7 3.0 10 10 10 NE NE MW-1 03/19/08 0.986 0.842 0.192 0.180 0.081 0.530 2.16 F,J 3.80 F,X NA NA 17.40 0.00 80.09 97.49 05/15/08 0.559 0.92 0.097 0.21 <0.005 0.27400 2.42 F,J <2.0 NA NA 17.35 0.00 80.14 5074.04 11/07/08 NS NS NS NS NS NS NS NS NA NA 17.36 0.00 5056.68 02/04/09 0.260 0.410 0.130 0.031 0.0061J 0.0884 3.60 4.20 NA NA 17.51 0.00 5056.53 06/10/09 0.120 0.350 0.130 0.0052J 0.0015J 0.0097J 2.50 5.10 NA NA 17.29 0.00 5056.75 09/30/09 0.150 0.650 0.110 0.015 0.0031 0.0528 4.10 4.10 NA NA 17.02 0.00 5057.02 04/13/10 0.031 0.190 0.180 0.0014 0.0012 0.00155 1.4 1.5 NA NA 17.53 0.00 5056.51 09/29/10 0.061 0.350 0.150 <0.005 <0.005 <0.005 2.7 1.8 NA NA 17.50 0.00 5056.54 03/06/14 NS NS NS NS NS NS NS NS NS NS NM NM NM 09/17/14 NS NS NS NS NS NS NS NS NS NS NM NM NM 12/22/14 NS NS NS NS NS NS NS NS NS NS NM NM NM MW-2 03/19/08 <0.001 <0.001 <0.001 0.027 B <0.001 <0.003 0.493 F,J <2.0 F,X NA NA 6.18 0.00 88.08 94.26 05/15/08 <0.001 0.001 <0.001 0.007 B <0.001 <0.003 <0.05 F <2.0 F,X NA NA 7.01 0.00 87.25 5070.81 11/07/08 NS NS NS NS NS NS NS NS NA NA 6.89 0.00 5063.92 02/04/09 0.0026J 0.0023J <0.005 0.00017J 0.00081J 0.0024J 0.044J 0.520 NA NA 7.70 0.00 5063.11 06/10/09 <0.005 0.00031J <0.005 <0.005 <0.005 <0.005 <0.1 0.140 NA NA 8.56 0.00 5062.25 09/30/09 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.1 <0.1 NA NA 9.14 0.00 5061.67 04/13/10 <0.001 <0.001 <0.001 <0.001 <0.002 <0.001 <0.1 0.27 NA NA 11.85 0.00 5058.96 09/29/10 0.00017J <0.001 <0.001 <0.001 <0.001 <0.001 0.027J 0.16 NA NA 11.69 0.00 5059.12 03/06/14 NS NS NS NS NS NS NS NS NS NS NM NM NM 09/17/14 NS NS NS NS NS NS NS NS NS NS NM NM NM 12/22/14 NS NS NS NS NS NS NS NS NS NS NM NM NM MW-3 03/19/08 <0.001 <0.001 <0.001 0.015 B <0.001 0.014 B 3.10 F <2.0 F,UJ,X NA NA 12.83 0.00 79.10 91.93 05/15/08 <0.001 <0.001 <0.001 <0.005 <0.001 <0.003 0.237 F <2.0 F,X NA NA 12.84 0.00 79.09 5069.48 11/07/08 0.022 J 0.180 <0.005 0.130 0.009 J 0.240 67 140 NA NA 12.81 0.14 5056.78 01/27/09 NS NS NS NS NS NS NS NS NA NA 13.10 0.01 5056.39 02/04/09 13.12 0.00 5056.36 06/10/09 0.0076 0.014 0.008 0.074 <0.005 0.065 2.40 510 NA NA 12.74 0.03 5056.76 09/30/09 0.021 0.020 0.015 0.044 <0.001 0.049 5.70 110 NA NA 12.53 0.01 5056.96 04/13/10 0.0025 <0.001 <0.001 0.020 <0.001 0.0263 1.9 170 NA NA 13.02 0.00 5056.46 09/29/10 13.00 0.00 5056.48 03/06/14 NS NS NS NS NS NS NS NS NS NS NM NM NM 09/17/14 NS NS NS NS NS NS NS NS NS NS NM NM NM 12/22/14 NS NS NS NS NS NS NS NS NS NS NM NM NM MW-4 03/19/08 16.34 0.00 75.05 91.39 05/15/08 <0.001 <0.001 0.0660 <0.005 <0.001 <0.003 <0.05 F <2.0 F,X NA NA 14.51 0.00 76.88 5067.95 11/07/08 NS NS NS NS NS NS NS NS NA NA 13.48 0.00 5054.47 02/04/09 0.0019J 0.00023J 0.066 0.0023J <0.005 0.001J 0.250 4.40 NA NA 13.74 0.00 5054.21 06/10/09 0.110 0.028 0.065 0.0072 0.00055J 0.00596J 0.670 2.00 NA NA 12.95 0.00 5055.00 09/30/09 0.040 0.018 0.062 0.0028 <0.001 0.00194 0.43 1.9 NA NA 13.49 0.00 5054.46 04/13/10 0.0067 0.0014 0.016 <0.002 <0.001 <0.001 <0.1 0.18 NA NA 14.55 0.00 5053.40 09/29/10 0.0095 0.002 0.042 0.00099J 0.00013J 0.00082J 0.23 0.95 NA NA 13.77 0.00 5054.18 03/06/14 NS NS NS NS NS NS NS NS NS NS NM NM NM 09/17/14 NS NS NS NS NS NS NS NS NS NS NM NM NM 12/22/14 NS NS NS NS NS NS NS NS NS NS NM NM NM MW-5 03/19/08 Dry 0.00 -- 88.90 05/15/08 Dry 0.00 -- 5065.45 11/07/08 Dry 0.00 -- 02/04/09 Dry 0.00 -- 06/10/09 Dry 0.00 -- 09/30/09 Dry 0.00 -- 04/13/10 Dry 0.00 -- 09/29/10 Dry 0.00 -- 03/06/14 NS NS NS NS NS NS NS NS NS NS NM NM NM 09/17/14 NS NS NS NS NS NS NS NS NS NS NM NM NM 12/22/14 NS NS NS NS NS NS NS NS NS NS NM NM NM Not enough water volume to collect a sample Dry Dry Dry Dry Not enough water volume to collect a sample Not enough water volume to collect a sample Dry Dry Dry Dry 2 of 7 TABLE 1 GROUNDWATER ANALYTICAL AND ELEVATION DATA SUMMARY PALMER TIRE 395 SOUTH 200 EAST ROOSEVELT, UTAH SAMPLE ETHYL-NAPH-ORGANIC LOCATION DATE BENZENE BENZENE MTBE THALENE TOLUENE XYLENES TPH-GRO TPH-DRO LEAD LEAD DTW FPT WTE TOC (ft.)MM/DD/YY (mg/L)(mg/L)(mg/L)(mg/L)(mg/L)(mg/L)(mg/L)(mg/L)(mg/L)(mg/L)(feet)(feet)(feet) Initial Screening Levels 0.005 0.7 0.2 0.7 1.0 10 1.0 1.0 NE NE RBCA Tier 1 Screening 0.3 4.0 0.2 0.7 3.0 10 10 10 NE NE MW-6 03/19/08 <0.001 0.002 <0.001 0.003 B <0.001 0.032 B 0.660 F <2.0 F,X NA NA 10.99 0.00 77.51 88.50 05/15/08 0.002 <0.001 0.0730 <0.005 <0.001 <0.003 <0.05 F <2.0 F,X NA NA 11.54 0.00 76.96 5065.05 11/07/08 NS NS NS NS NS NS NS NS NA NA 11.45 0.00 5053.60 02/04/09 0.017 0.012 0.040 0.00047J <0.005 0.00193J 0.300 2.40 NA NA 11.59 0.00 5053.46 06/10/09 0.0014J 0.00016J 0.025 0.00041J <0.005 <0.005 0.034J 0.440 NA NA 11.78 0.00 5053.27 09/30/09 <0.001 <0.001 0.051 <0.001 <0.001 <0.001 <0.1 0.83 NA NA 11.78 0.00 5053.27 04/13/10 <0.001 <0.001 0.0018 <0.001 <0.001 <0.001 <0.1 0.2 NA NA 11.80 0.00 5053.25 09/29/10 <0.001 <0.001 0.0032 <0.001 <0.001 <0.001 <0.1 0.29 NA NA 11.87 0.00 5053.18 03/06/14 NS NS NS NS NS NS NS NS NS NS NM NM NM 09/17/14 NS NS NS NS NS NS NS NS NS NS NM NM NM 12/22/14 NS NS NS NS NS NS NS NS NS NS NM NM NM 03/03/15 NS NS NS NS NS NS NS NS NS NS 19.83 0.00 5045.22 MW-7 03/19/08 <0.001 0.001 0.206 0.016 B <0.001 <0.003 1.30 F <2.0 F,UJ,X NA NA 15.45 0.00 75.58 91.03 05/15/08 0.023 <0.001 0.1670 <0.025 <0.001 <0.015 0.262 F,J <2.0 F,X NA NA 15.18 0.00 75.85 5067.57 11/07/08 NS NS NS NS NS NS NS NS NS NS 14.11 0.00 5053.46 02/04/09 0.00013J 0.00036J 0.082 <0.005 <0.005 0.00027J 0.170 1.70 NA NA 15.12 0.00 5052.45 06/10/09 0.00016J <0.005 0.039 <0.005 <0.005 0.00021J 0.058J 1.20 NA NA 14.29 0.00 5053.28 09/30/09 <0.001 <0.001 0.015 <0.001 <0.001 <0.001 <0.1 0.67 NA NA 15.71 0.00 5051.86 04/13/10 <0.001 <0.001 0.014 <0.001 <0.001 <0.001 <0.1 0.18 NA NA 15.93 0.00 5051.64 09/29/10 0.00043J <0.001 0.0043 <0.001 <0.001 <0.001 <0.1 0.29 NA NA 15.89 0.00 5051.68 03/06/14 NS NS NS NS NS NS NS NS NS NS NM NM NM 09/17/14 NS NS NS NS NS NS NS NS NS NS NM NM NM 12/22/14 NS NS NS NS NS NS NS NS NS NS NM NM NM 03/03/15 NS NS NS NS NS NS NS NS NS NS 15.93 0.00 5051.64 MW-8 03/19/08 3.31 Jcal 1.120 0.141 0.375 0.448 1.900 16.90 F 5.20 F,J,X NA NA 12.75 0.00 65.92 78.67 05/15/08 3.610 1.010 0.1910 0.215 0.1650 0.9390 8.43 F <2.0 F,X NA NA 12.81 0.00 65.86 5052.64 11/07/08 NS NS NS NS NS NS NS NS NS NS 12.24 0.00 5040.40 02/04/09 3.700 1.000 0.240J 0.280 0.260 0.800 19 10 NA NA 13.90 0.00 5038.74 06/10/09 3.200 0.740 0.210 0.170 0.150 0.561 14 14 NA NA 13.10 0.00 5039.54 09/30/09 2.900 0.420 0.190 0.100 0.130 0.260 11 15 NA NA 12.62 0.00 5040.02 04/13/10 3.400 1.100 2.20 1.60 1.0000 5.230 15 16 NA NA 15.18 0.00 5037.46 09/29/10 2.900 0.710 0.190 0.150 0.240 0.430 14 3.5 NA NA 11.79 0.00 5040.85 03/06/14 NS NS NS NS NS NS NS NS NS NS 16.45 0.22 5036.36 09/17/14 NS NS NS NS NS NS NS NS NS NS NM NM NM 12/22/14 NS NS NS NS NS NS NS NS NS NS NM NM NM 04/26/16 NS NS NS NS NS NS NS NS NS NS 13.97 0.00 NM 08/08/16 NS NS NS NS NS NS NS NS NS NS 12.22 0.00 NM MW-9 03/19/08 0.089 0.163 <0.001 0.015 0.058 0.422 0.521 F,J 3.50 F,J,X NA NA 14.45 0.00 85.55 100.00 05/15/08 8.70 0.19 91.44 05/22/08 <0.005 P 0.013 P <0.001 P 0.167 P 0.024 P 0.47 P 6.29 F,P 31.30 F,P,X NA NA 4.45 0.02 95.57 5076.52 11/07/08 0.058 0.11 <0.005 0.065 0.054 0.266 4.90 16.00 NA NA 5.38 0.03 5071.16 01/27/09 NS NS NS NS NS NS NS NS NA NA 10.28 0.00 5066.24 02/04/09 0.044J 0.800 <0.050 0.310 0.200 1.430 5.40 240 NA NA 10.18 0.20 5066.49 06/10/09 <0.005 0.120 <0.005 0.180 0.014 0.348 15.00 200 0.00748 0.525 4.20 0.00 5072.32 09/30/09 <0.001 <0.001 <0.001 0.0026 <0.001 0.00288 1.7 95 NA NA 3.60 0.00 5072.92 09/30/09*<0.001 0.0011 <0.001 0.0038 <0.001 0.00401 0.73 98 NA NA ------ 04/13/10 0.025 0.620 <0.010 0.320 0.060 1.280 4.2 2.4 NA NA 7.73 0.01 5068.80 04/13/10*0.019 0.520 <0.010 0.220 0.048 1.060 3.0 2.2 NA NA ------ 09/29/10 <0.001 <0.001 <0.001 0.0016 <0.001 0.00288 0.56 0.61 NA NA 4.02 0.00 5072.50 9/29/2010*0.0004J 0.00055J <0.001 0.003 <0.001 0.0045 0.89 1.6 NA NA ------ 5076.99 03/06/14 NS NS NS NS NS NS NS NS NA NA 10.85 0.00 5066.14 09/17/14 NS NS NS NS NS NS NS NS NS NS NM NM NM 12/22/14 NS NS NS NS NS NS NS NS NS NS NM NM NM 03/03/15 NS NS NS NS NS NS NS NS NS NS 18.54 2.44 5060.28 MW-10 11/07/08 1.400 0.740 0.022 J 0.450 0.097 2.578 15.00 11.00 NA NA 3.18 0.00 5073.14 5076.32 02/04/09 1.700 1.000 0.039J 0.320 0.120 4.194 18.00 31.00 NA NA 4.90 0.02 5073.76 06/10/09 1.100 0.660 0.017J 0.400 0.072J 3.396 110 700 0.0125 <0.020†3.78 0.20 5072.69 09/30/09 1.300 0.700 0.013 0.400 0.079 3.074 15 21 NA NA 4.34 0.31 5072.21 04/13/10 1.600 1.000 0.023 0.430 0.083 3.688 19 29 NA NA 4.73 0.01 5071.60 Free Product Present, Well Not Sampled 3 of 7 TABLE 1 GROUNDWATER ANALYTICAL AND ELEVATION DATA SUMMARY PALMER TIRE 395 SOUTH 200 EAST ROOSEVELT, UTAH SAMPLE ETHYL-NAPH-ORGANIC LOCATION DATE BENZENE BENZENE MTBE THALENE TOLUENE XYLENES TPH-GRO TPH-DRO LEAD LEAD DTW FPT WTE TOC (ft.)MM/DD/YY (mg/L)(mg/L)(mg/L)(mg/L)(mg/L)(mg/L)(mg/L)(mg/L)(mg/L)(mg/L)(feet)(feet)(feet) Initial Screening Levels 0.005 0.7 0.2 0.7 1.0 10 1.0 1.0 NE NE RBCA Tier 1 Screening 0.3 4.0 0.2 0.7 3.0 10 10 10 NE NE MW-10 09/29/10 1.100 0.750 0.017 0.490 0.054 2.660 19 22 NA NA 4.78 0.02 5071.56 Cont.03/06/14 NS NS NS NS NS NS NS NS NS NS 15.74 8.94 5067.29 09/17/14 NS NS NS NS NS NS NS NS NS NS NM NM NM 12/22/14 NS NS NS NS NS NS NS NS NS NS NM NM NM 03/03/15 NS NS NS NS NS NS NS NS NS NS 14.14 8.01 5068.19 05/18/22 NS NS NS NS NS NS NS NS NS NS 21.66 14.21 5065.32 09/29/22 NS NS NS NS NS NS NS NS NS NS 8.99 2.08 5068.89 05/10/23 NS NS NS NS NS NS NS NS NS NS 6.27 1.56 5071.22 08/17/23 NS NS NS NS NS NS NS NS NS NS 5.34 0.68 5071.49 11/27/23 NS NS NS NS NS NS NS NS NS NS 5.40 0.32 5071.16 02/12/24 NS NS NS NS NS NS NS NS NS NS 5.45 0.47 5071.22 06/04/24 NS NS NS NS NS NS NS NS NS NS 4.67 0.11 5071.73 09/10/24 NS NS NS NS NS NS NS NS NS NS 5.01 0.04 5071.34 `12/04/24 NS NS NS NS NS NS NS NS NS NS 5.15 0.01 5071.18 MW-11 11/07/08 0.074 0.061 <0.005 0.085 0.011 0.078 0.660 1.900 NA NA 3.58 0.00 5075.06 5078.64 02/04/09 0.180 0.070 <0.005 0.150 0.017 0.078 1.30 5.00 NA NA 4.10 0.00 5074.54 06/10/09 0.025 0.012 <0.005 0.031 <0.005 0.0101 0.130 3.00 NA NA 3.31 0.00 5075.33 09/30/09 0.0054 0.0012 0.0012 0.010 <0.001 0.00498 0.43 1.6 NA NA 3.84 0.00 5074.80 04/13/10 0.015 0.0057 <0.001 0.011 <0.001 0.0035 0.28 1.2 NA NA 3.22 0.00 5075.42 09/29/10 0.480 0.130 <0.005 0.0064 0.0065 0.0045J 2.7 3.4 NA NA 4.70 0.00 5073.94 03/06/14 0.105 0.010 <0.005 0.0490 <0.005 0.017 1.01 F 1.5 X,M,F Jlo NA NA 12.36 0.00 5066.28 9/17/2014***0.163 0.012 <0.005 0.020 0.009 <0.015 0.559 F 4.6 X,M,F,Jlo NA NA 10.14 0.00 5067.74 12/22/14 0.345 0.033 <0.001 UJ 0.064 0.017 0.035 1.35 F 3.3 X,M,F,Jlo NA NA 10.32 0.00 5068.32 03/03/15 0.119 0.007 <0.001 0.041 0.005 0.030 1.96 F 5.4 X,M,F NA NA 10.08 0.00 5068.56 06/11/15 0.214 0.039 <0.001 UJ 0.059 0.015 0.032 1.12 F 3.6 X,M,F,Jlo NA NA 12.39 0.00 5066.25 04/26/16 0.050 0.011 <0.005 0.045 <0.005 0.024 1.38 17.8 NA NA 13.03 0.00 5065.61 08/08/16 0.062 <0.005 <0.005 <0.005 <0.005 <0.005 0.563 9.7 NA NA 10.03 0.00 5068.61 05/09/17 0.115 0.0288 <0.0100 <0.0500 <0.0100 <0.0300 0.904 16.7 NA NA 10.57 0.00 5068.07 11/13/19 NS NS NS NS NS NS NS NS NS NS 7.29 0.00 5069.99 09/29/22 NS NS NS NS NS NS NS NS NS NS 8.09 0.00 5069.19 05/10/23 0.0925 0.00687 <0.00100 0.00413 J 0.000320 J 0.00122 J 0.587 3.410 NS NS 3.98 0.00 5073.30 08/17/23 0.112 0.0132 <0.00100 0.00282 J 0.000550 J 0.00135 J 0.443 6.180 NS NS 6.53 0.00 5070.75 11/27/23 0.129 0.0175 <0.00100 0.00138 J <0.00100 0.000444 J 0.424 6.130 NS NS 12.00 0.00 5065.28 02/12/24 0.0313 0.00355 <0.00100 <0.00500 0.000357 J 0.000208 J 0.393 2.970 NS NS 21.89 0.00 5055.39 06/05/24 0.0496 0.00624 <0.00100 <0.00500 0.000417 J 0.000298 J 0.192 J3 5.090 NS NS 19.40 0.00 5057.88 09/11/24 0.0713 0.0139 <0.00100 0.00143 J 0.000529 J 0.000497 J 0.476 14.100 NS NS 14.83 0.00 5062.45 12/04/24 0.141 0.0221 <0.00100 0.00198 J 0.00107 0.00118 J 0.428 9.940 NS NS 18.19 0.00 5059.09 MW-12 11/07/08 2.800 1.200 <0.005 0.460 1.300 3.100 26 5.20 NA NA 4.57 0.00 5073.31 5077.88 02/04/09 5.800 0.780 <0.100 0.190 0.750 0.840 7.30 NA**NA NA 6.00 0.00 5071.88 06/10/09 6.200 2.200 <0.500 0.760 3.700 6.700 41 7.10 <0.005 <0.020†5.54 0.00 5072.34 09/30/09 5.200 1.200 <0.050 0.380 2.300 2.960 25 11 NA NA 6.22 0.00 5071.66 04/13/10 5.100 1.300 <0.050 0.270 1.700 2.690 10 8.4 NA NA 6.65 0.00 5071.23 09/29/10 4.100 0.640 <0.1 0.300 0.920 1.210 18 E 3.4 NA NA 8.13 0.00 5069.75 03/06/14 3.41 0.388 <0.005 0.371 0.021 0.096 4.55 F 2.6 X,M,F NA NA 11.82 0.00 5066.06 03/06/14*3.33 0.372 <0.005 0.377 0.020 0.094 4.83 F 2.6 X,M,F NA NA ------ 9/17/2014***4.30 0.584 <0.01 0.244 0.077 0.480 9.29 F <1 X,M,F,UJ NA NA 10.65 0.00 5067.23 12/22/14 3.39 0.413 <0.001 UJ 0.313 0.019 0.102 5.81 F 1.8 X,M,F NA NA 10.86 0.00 5067.02 03/03/15 3.01 0.470 <0.001 0.239 0.026 0.130 7.05 F 3.9 X,M,F NA NA 11.10 0.00 5066.78 06/11/15 3.08 0.398 <0.005 UJ 0.277 0.033 0.223 4.90 F 1.4 X,M,F NA NA 9.61 0.00 5068.27 04/26/16 2.26 0.313 <0.005 0.242 0.024 0.092 3.67 9.60 NA NA 10.21 0.00 5067.67 08/08/16 4.22 0.534 <0.005 0.262 0.041 0.263 6.61 8.20 NA NA 10.28 0.00 5067.60 MW-13 11/07/08 <0.005 <0.005 <0.005 <0.005 <0.005 <0.005 <0.50 0.960 NA NA 19.10 0.00 5057.22 5076.32 11/07/08 *<0.005 <0.005 <0.005 <0.005 <0.005 <0.005 <0.50 0.740 NA NA ------ 02/04/09 NM NM NM 06/10/09 NM NM NM 09/30/09 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.1 0.510 NA NA 8.78 0.00 5067.54 04/13/10 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.1 0.55 NA NA 19.44 0.00 5056.88 09/29/10 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.1 0.64 NA NA 19.42 0.00 5056.90 03/06/14 <0.001 <0.001 <0.001 <0.002 <0.001 <0.003 <0.05 F 1.1 X,M,F NA NA 21.44 0.00 5054.88 Well was destroyed during over-excavation Could not locate, buried under snow Could not locate, buried under gravel 4 of 7 TABLE 1 GROUNDWATER ANALYTICAL AND ELEVATION DATA SUMMARY PALMER TIRE 395 SOUTH 200 EAST ROOSEVELT, UTAH SAMPLE ETHYL-NAPH-ORGANIC LOCATION DATE BENZENE BENZENE MTBE THALENE TOLUENE XYLENES TPH-GRO TPH-DRO LEAD LEAD DTW FPT WTE TOC (ft.)MM/DD/YY (mg/L)(mg/L)(mg/L)(mg/L)(mg/L)(mg/L)(mg/L)(mg/L)(mg/L)(mg/L)(feet)(feet)(feet) Initial Screening Levels 0.005 0.7 0.2 0.7 1.0 10 1.0 1.0 NE NE RBCA Tier 1 Screening 0.3 4.0 0.2 0.7 3.0 10 10 10 NE NE MW-13 09/17/14 <0.001 <0.001 <0.001 <0.002 <0.001 <0.003 <0.05 F <1 X,M,F,UJ NA NA 20.44 0.00 5055.88 Cont.12/22/14 <0.001 <0.001 <0.001 UJ <0.002 UJ <0.001 <0.003 <0.05 F <1 X,M,F NA NA 21.32 0.00 5055.00 03/03/15 <0.001 <0.001 <0.001 <0.002 <0.001 <0.003 <0.05 F <1 X,M,F NA NA 21.70 0.00 5054.62 06/11/15 <0.001 <0.001 <0.001 UJ <0.002 <0.001 <0.003 <0.05 F <1 X,M,F NA NA 20.98 0.00 5055.34 04/26/16 <0.002 <0.005 <0.005 <0.010 <0.005 <0.010 0.100 1.0 NA NA 21.13 0.00 5055.19 08/08/16 <0.002 <0.005 <0.005 <0.005 <0.005 <0.005 <0.050 <1.0 NA NA 21.20 0.00 5055.12 05/09/17 NM NM NM MW-14 11/07/08 Dry ---- 5048.74 01/27/09 NS NS NS NS NS NS NS NS NA NA 13.40 0.00 5035.34 02/04/09 0.059 0.0089J 0.050 0.056 0.024J 0.197 31 10 NA NA 13.46 0.00 5035.28 06/10/09 0.190 0.140 0.180 0.280 0.023J 0.770 8.30 17 NA NA 12.81 0.00 5035.93 09/30/09 0.230 0.170 0.160 0.170 0.020 0.518 11 95 NA NA 12.80 0.00 5035.94 04/13/10 0.099 0.100 0.140 0.190 0.011 0.503 6.2 5.1 NA NA 14.98 0.00 5033.76 09/29/10 0.140 0.088 0.130 0.120 0.010 0.318 5.8 F 4 X,M,F NA NA 11.82 0.00 5036.92 03/06/14 NS NS NS NS NS NS NS NS NS NS 14.30 0.00 5034.44 09/17/14 NS NS NS NS NS NS NS NS NS NS NM NM NM 12/22/14 NS NS NS NS NS NS NS NS NS NS NM NM NM 03/03/15 NS NS NS NS NS NS NS NS NS NS 14.65 0.00 5034.09 04/26/16 NS NS NS NS NS NS NS NS NS NS 14.48 0.00 5034.26 08/08/16 NS NS NS NS NS NS NS NS NS NS 12.77 0.00 5035.97 05/09/17 NS NS NS NS NS NS NS NS NS NS 10.27 0.00 5038.47 05/18/22 0.00713 J 0.0523 0.0210 0.0312 J <0.0100 0.0334 31.500 53.000 NS NS 14.38 0.00 5034.36 09/29/22 0.00985 J 0.0473 0.0630 0.0259 J <0.0100 0.0251 J 8.570 J 9.180 NS NS 12.71 0.00 5036.03 05/10/23 0.00948 0.000682 J 0.00486 0.0328 0.00183 0.0770 2.880 9.670 NS NS 8.43 0.00 5040.31 08/17/23 0.0115 0.000150 J 0.0125 0.0430 0.00204 0.0740 4.040 12.400 NS NS 11.17 0.00 5037.57 11/27/23 0.00946 0.000200 J 0.0301 0.0336 0.00125 0.0525 9.870 17.200 NS NS 12.10 0.00 5036.64 02/12/24 0.00819 0.000413 J 0.0357 0.0719 0.00151 0.0949 19.200 36.900 NS NS 14.06 0.00 5034.68 06/05/24 0.00914 0.000439 J 0.0655 0.0691 0.00107 0.0735 4.070 J3 14.400 NS NS 13.82 0.00 5034.92 09/11/24 0.00931 0.00188 0.0835 0.0273 0.000578 J 0.0342 5.290 33.500 NS NS 12.28 0.00 5036.46 12/04/24 0.00827 0.00185 0.0712 0.0276 0.000574 J 0.0238 8.880 9.200 NS NS 13.00 0.00 5035.74 MW-15 11/07/08 Dry ---- 5047.17 01/27/09 NS NS NS NS NS NS NS NS NS NS 16.32 0.00 5030.85 02/04/09 0.140 0.073 0.180 0.180 0.027 0.630 8.10 220 NA NA 16.48 0.00 5030.69 06/10/09 0.930 0.068J 0.074J 0.017J 1.000 0.440 38 130 NA NA 15.35 0.00 5031.82 09/30/09 1.000 0.100 0.067 0.051 1.400 0.590 50 170 NA NA 14.95 0.00 5032.22 04/13/10 17.50 0.00 5029.67 09/29/10 0.710 0.099 0.067 0.083 0.830 0.830 38 180 NA NA 15.98 0.00 5031.19 03/06/14 NS NS NS NS NS NS NS NS NS NS 17.38 0.00 5029.79 09/17/14 NS NS NS NS NS NS NS NS NS NS NM NM NM 12/22/14 NS NS NS NS NS NS NS NS NS NS NM NM NM 03/03/15 NS NS NS NS NS NS NS NS NS NS 17.35 0.00 5029.82 04/26/16 NS NS NS NS NS NS NS NS NS NS 17.04 0.00 5030.13 08/08/16 NS NS NS NS NS NS NS NS NS NS 16.93 0.00 5030.24 05/09/17 NS NS NS NS NS NS NS NS NS NS 14.39 0.00 5032.78 05/18/22 17.36 0.00 5029.81 09/29/22 DRY 0.00 DRY 05/10/23 DRY 0.00 DRY 08/17/23 0.00477 <0.00100 0.00172 0.00222 J 0.000311 J 0.00119 J <1.000 6.720 NA NA 15.14 0.00 5032.03 11/27/23 0.0143 <0.00100 0.00504 0.00341 J <0.00100 0.000576 J <1.000 11.400 NA NA 16.65 0.00 5030.52 02/12/24 DRY 0.00 DRY 06/05/24 17.17 0.00 5030.00 09/11/24 0.0319 <0.00100 0.00543 0.00269 J <0.00100 <0.00300 0.788 J 14.200 NA NA 16.68 0.00 5030.49 12/04/24 0.0634 <0.00100 0.00915 <0.00500 <0.00100 <0.00300 0.0718 J 18.400 NA NA 16.89 0.00 5030.28 MW-16 03/06/14 0.758 0.222 <0.001 0.168 0.019 0.070 1.93 F 3.5 X,M,F NA NA 8.33 0.00 5068.75 5077.08 09/17/14 1.16 0.248 <0.001 0.515 0.020 0.046 2.46 F 1.0 X,M,F,Jlo NA NA 7.96 0.00 5069.12 12/22/14 0.972 0.246 <0.001 UJ 0.413 0.019 0.038 2.37 F 3.6 X,M,F NA NA 9.10 0.00 5067.98 03/03/15 0.894 0.295 <0.001 0.428 0.023 0.058 3.24 F 9.0 X,M,F NA NA 10.23 0.00 5066.85 06/11/15 0.882 0.293 <0.001 UJ 0.551 0.022 0.057 1.91 F 4.3 X,M,F NA NA 8.37 0.00 5068.71 04/26/16 1.03 0.257 <0.005 0.522 0.030 0.072 2.81 14.4 NA NA 9.10 0.00 5067.98 Well was dry Dry Well was dry Well could not be located Not enough water volume to collect a sample Not enough water volume to collect a sample Well was dry Dry Not enough water volume to collect a sample 5 of 7 TABLE 1 GROUNDWATER ANALYTICAL AND ELEVATION DATA SUMMARY PALMER TIRE 395 SOUTH 200 EAST ROOSEVELT, UTAH SAMPLE ETHYL-NAPH-ORGANIC LOCATION DATE BENZENE BENZENE MTBE THALENE TOLUENE XYLENES TPH-GRO TPH-DRO LEAD LEAD DTW FPT WTE TOC (ft.)MM/DD/YY (mg/L)(mg/L)(mg/L)(mg/L)(mg/L)(mg/L)(mg/L)(mg/L)(mg/L)(mg/L)(feet)(feet)(feet) Initial Screening Levels 0.005 0.7 0.2 0.7 1.0 10 1.0 1.0 NE NE RBCA Tier 1 Screening 0.3 4.0 0.2 0.7 3.0 10 10 10 NE NE MW-16 08/08/16 1.15 0.282 <0.005 0.428 0.025 0.063 2.68 17.8 NA NA 8.50 0.00 5068.58 Cont. MW-17 03/06/14 0.830 0.179 <0.01 0.177 <0.01 0.051 2.59 F 1.7 X,M,F NA NA 23.16 0.00 5054.12 5077.28 09/17/14 1.09 0.215 <0.001 0.069 0.001 0.027 2.81 F <1 X,M,F NA NA 24.25 0.00 5052.83 12/22/14 1.07 0.269 <0.001 UJ 0.065 <0.001 0.028 3.29 F <1 X,M,F NA NA 24.42 0.00 5052.86 03/03/15 0.669 0.176 <0.001 0.062 <0.001 0.019 3.83 F <1 X,M,F NA NA 23.29 0.00 5053.99 06/11/15 0.658 0.250 <0.005 0.106 <0.005 <0.015 2.19 F <1 X,M,F NA NA 24.13 0.00 5053.15 04/26/16 0.992 0.154 <0.005 0.431 <0.005 0.023 6.31 10.6 NA NA 24.32 TRACE 5052.96 08/08/16 0.624 0.364 <0.005 0.470 0.243 0.440 6.02 14.4 NA NA 22.37 0.22 5055.08 05/09/17 0.375 <0.0100 <0.0100 0.151 0.0773 0.188 4.11 48.8 NA NA 20.81 SHEEN 5056.47 07/24/18 NS NS 23.08 0.20 5054.35 10/30/18 NS NS 24.58 0.18 5052.84 01/09/19 NS NS 24.37 0.17 5053.04 04/16/19 0.604 0.385 <0.005 0.672 0.149 0.335 31.7 101 NA NA 21.50 0.00 5055.78 11/13/19 NS NS 23.25 0.12 5054.12 02/19/20 NS NS 24.27 0.23 5053.18 05/11/20 0.836 0.365 <0.0500 0.297 0.0916 0.256 9.370 B 40.000 NA NA 21.41 0.00 5055.87 08/11/20 NS NS 22.15 0.57 5055.56 09/27/21 NS NS 24.29 0.66 5053.49 01/12/22 NS NS 24.28 0.57 5053.43 05/18/22 NS NS 23.74 0.55 5053.95 09/29/22 NS NS 23.51 0.56 5054.19 05/10/23 NS NS 24.02 0.50 5053.64 08/17/23 NS NS 21.62 0.50 5056.04 11/27/23 NS NS 24.36 1.58 5054.11 02/12/24 NS NS 24.37 1.52 5054.05 06/04/24 NS NS 24.15 2.13 5054.73 09/10/24 NS NS 22.54 2.25 5056.43 12/04/24 NS NS 24.29 1.90 5054.42 MW-18 03/06/14 DRY NM NM 5076.65 04/06/14 0.002 <0.001 <0.001 <0.002 <0.001 <0.003 1.1 F 0.135 F,X,M NA NA 23.00 0.00 5053.65 09/17/14 <0.001 <0.001 <0.001 <0.002 <0.001 <0.003 <0.05 F <1 X,M,F,UJ NA NA 19.67 0.00 5056.98 12/22/14 <0.001 <0.001 <0.001 UJ 0.002 Jlo <0.001 <0.003 <0.05 F <1 X,M,F NA NA 21.38 0.00 5055.27 03/03/15 <0.001 <0.001 <0.001 <0.002 <0.001 <0.003 0.070 F <1 X,M,F NA NA 21.83 0.00 5054.82 06/11/15 <0.001 <0.001 <0.001 <0.002 <0.001 <0.003 <0.05 F <1 X,M,F NA NA 9.10 0.00 5067.55 04/26/16 <0.002 <0.005 <0.005 <0.010 <0.005 <0.010 0.099 7.9 NA NA 20.37 0.00 5056.28 05/09/17 <0.0010 <0.0010 <0.0010 <0.0050 <0.0010 <0.0030 <0.100 12.50 NA NA 7.60 0.00 5069.05 07/24/18 0.020 <0.012 <0.005 <0.012 <0.012 <0.012 <0.125 4.9 NA NA 22.05 0.00 5054.60 10/30/18 0.038 <0.012 <0.005 <0.012 <0.012 <0.012 0.225 7.1 NA NA 23.02 0.00 5053.63 01/09/19 0.076 0.025 <0.005 <0.012 <0.012 0.014 0.650 7.4 NA NA 22.35 0.00 5054.30 04/16/19 0.007 <0.012 <0.005 <0.012 <0.012 <0.012 <0.125 5.1 NA NA 20.31 0.00 5056.34 11/13/19 0.00421 <0.001 0.000722 J <0.005 <0.001 <0.003 0.233 B 8.130 NA NA 22.14 0.00 5054.51 02/19/20 NS NS 22.29 0.20 5054.51 05/11/20 NS NS 21.11 0.52 5055.93 08/11/20 NS NS 21.15 0.38 5055.79 09/27/21 NS NS 21.81 0.15 5054.95 01/12/22 NS NS 21.79 0.02 5054.88 05/18/22 NS NS 21.12 0.14 5055.64 09/29/22 0.0341 0.198 <0.00500 0.301 0.0222 0.346 7.630 J 13.400 NA NA 18.81 0.00 5057.84 05/10/23 NS NS 5.67 0.08 5071.04 08/17/23 NS NS 9.46 0.02 5067.21 11/27/23 <0.00100 0.00109 <0.00100 0.0194 <0.00100 0.00712 1.630 5.670 NA NA 6.97 0.00 5069.68 02/12/24 <0.00100 0.000432 J <0.00100 0.00413 J <0.00100 0.00307 0.537 3.610 NA NA 5.86 0.00 5070.79 06/05/24 <0.00100 0.000645 J <0.00100 0.00227 J <0.00100 0.00419 0.500 J3 7.020 NA NA 5.76 0.00 5070.89 09/11/24 0.000257 J 0.00213 <0.00100 <0.00500 <0.00100 0.0106 1.530 8.690 NA NA 7.13 0.00 5069.52 12/04/24 0.000155 B,J 0.000244 J <0.00100 <0.00500 <0.00100 0.00183 J 0.415 4.190 B NA NA 5.34 0.00 5071.31 MW-19 03/06/14 <0.001 <0.001 0.027 <0.002 <0.001 <0.003 0.063 F <1 X,M,F NA NA 20.93 0.00 5054.59 5075.52 09/17/14 0.003 <0.001 0.003 <0.002 <0.001 <0.003 <0.05 F <1 X,M,F,UJ NA NA 19.94 0.00 5055.58 12/22/14 <0.001 <0.001 <0.001 UJ <0.002 UJ <0.001 UJ <0.003 <0.05 F <1 X,M,F NA NA 20.83 0.00 5054.69 03/03/15 <0.001 <0.001 0.009 <0.002 <0.001 <0.003 <0.05 F <1 X,M,F NA NA 21.29 0.00 5054.23 Free Product Present, Well Not Sampled Not enough water volume to collect a sample Free Product Present, Well Not Sampled Free Product Present, Well Not Sampled Well was destroyed during over-excavation Free Product Present, Well Not Sampled Free Product Present, Well Not Sampled Free Product Present, Well Not Sampled Free Product Present, Well Not Sampled Free Product Present, Well Not Sampled Free Product Present, Well Not Sampled Free Product Present, Well Not Sampled Free Product Present, Well Not Sampled Free Product Present, Well Not Sampled Free Product Present, Well Not Sampled Free Product Present, Well Not Sampled Free Product Present, Well Not Sampled Free Product Present, Well Not Sampled Free Product Present, Well Not Sampled Free Product Present, Well Not Sampled Free Product Present, Well Not Sampled Free Product Present, Well Not Sampled Free Product Present, Well Not Sampled Free Product Present, Well Not Sampled Free Product Present, Well Not Sampled Free Product Present, Well Not Sampled Free Product Present, Well Not Sampled 6 of 7 TABLE 1 GROUNDWATER ANALYTICAL AND ELEVATION DATA SUMMARY PALMER TIRE 395 SOUTH 200 EAST ROOSEVELT, UTAH SAMPLE ETHYL-NAPH-ORGANIC LOCATION DATE BENZENE BENZENE MTBE THALENE TOLUENE XYLENES TPH-GRO TPH-DRO LEAD LEAD DTW FPT WTE TOC (ft.)MM/DD/YY (mg/L)(mg/L)(mg/L)(mg/L)(mg/L)(mg/L)(mg/L)(mg/L)(mg/L)(mg/L)(feet)(feet)(feet) Initial Screening Levels 0.005 0.7 0.2 0.7 1.0 10 1.0 1.0 NE NE RBCA Tier 1 Screening 0.3 4.0 0.2 0.7 3.0 10 10 10 NE NE MW-19 06/11/15 <0.001 <0.001 0.003 <0.002 <0.001 <0.003 <0.05 F <1 X,M,F NA 0.003 20.48 0.00 5055.04 Cont.04/26/16 <0.002 <0.005 0.013 0.014 <0.005 <0.010 0.120 <1.0 NA NA 20.63 0.00 5054.89 08/08/16 <0.002 <0.005 0.007 <0.005 <0.005 <0.005 <0.050 <1.0 NA NA 20.69 0.00 5054.83 05/09/17 <0.0010 <0.0010 0.0171 <0.0050 <0.0010 <0.0030 <0.100 1.00 NA NA 19.92 0.00 5055.60 07/24/18 <0.005 <0.012 0.019 <0.012 <0.012 <0.012 <0.125 <1.0 NA NA 20.20 0.00 5055.32 10/30/18 <0.005 <0.012 0.016 <0.012 <0.012 <0.012 <0.125 1.0 NA NA 20.44 0.00 5055.08 01/09/19 <0.005 <0.012 0.011 <0.012 <0.012 <0.012 <0.125 <1.0 NA NA 21.53 0.00 5053.99 04/16/19 <0.005 <0.012 0.025 <0.012 <0.012 <0.012 <0.125 <1.0 NA NA 20.18 0.00 5055.34 11/13/19 0.00141 <0.001 0.0127 <0.005 <0.001 <0.003 0.351 1.110 NA NA 21.26 0.00 5054.26 02/19/20 0.00112 <0.00100 0.0215 0.00178 J <0.00100 <0.00300 0.116 1.190 J4 NA NA 21.81 0.00 5053.71 05/11/20 0.000876 J 0.000302 J 0.0281 <0.00500 <0.00100 <0.00300 0.339 0.979 NA NA 20.64 0.00 5054.88 08/11/20 0.00406 0.000598 J 0.0192 <0.00500 <0.00100 <0.00300 0.361 B 0.985 NA NA 20.79 0.00 5054.73 09/27/21 0.0212 0.0257 0.0315 0.0894 0.00207 0.00996 1.490 3.470 NA NA 20.31 0.00 5055.21 01/12/22 0.0356 0.0217 0.0207 0.0691 0.00126 0.00674 2.160 3.190 NA NA 21.32 0.00 5054.20 05/18/22 0.00803 0.00524 0.0267 0.0220 0.000621 J 0.00333 1.470 3.470 NA NA 20.69 0.00 5054.83 09/29/22 0.00618 0.00388 0.0903 0.0212 0.000349 J 0.00314 0.791 2.280 NA NA 20.11 0.00 5055.41 05/10/23 0.00114 <0.00100 0.00174 0.0142 <0.00100 0.00128 J 0.767 J 2.020 NA NA 19.35 0.00 5056.17 08/17/23 0.00607 0.000988 J 0.00489 0.0140 <0.00100 0.00104 J <1.000 2.370 NA NA 19.68 0.00 5055.84 11/27/23 0.00194 0.000459 J 0.00336 0.0113 <0.00100 0.000673 J 0.671 1.740 NA NA 19.98 0.00 5055.54 02/12/24 0.00117 0.000174 J 0.00204 0.0117 <0.00100 0.000596 J 0.577 1.540 NA NA 20.10 0.00 5055.42 06/05/24 0.000635 J <0.00100 0.00140 0.00611 <0.00100 0.000220 J 0.490 J3 1.300 NA NA 19.13 0.00 5056.39 09/11/24 0.000632 J <0.00100 0.00168 0.00509 <0.00100 0.000241 J 0.694 1.370 NA NA 19.52 0.00 5056.00 12/04/24 0.000486 B,J <0.00100 0.00105 0.00483 J <0.00100 <0.00300 0.456 1.130 NA NA 19.62 0.00 5055.90 MW-20 03/06/14 <0.001 <0.001 <0.001 <0.002 <0.001 <0.003 <0.05 F <1 X,M,F NA NA 9.28 0.00 5069.67 5078.95 09/17/14 <0.001 <0.001 <0.001 <0.002 <0.001 <0.003 <0.05 F <1 X,M,F,UJ NA NA 7.43 0.00 5071.52 12/22/14 <0.001 <0.001 <0.001 UJ <0.002 UJ <0.001 <0.003 <0.05 F <1 X,M,F NA NA 8.07 0.00 5070.88 03/03/15 <0.001 <0.001 <0.001 <0.002 <0.001 <0.003 <0.05 F <1 X,M,F NA NA 7.83 0.00 5071.12 06/11/15 <0.001 <0.001 <0.001 <0.002 <0.001 <0.003 <0.05 F <1 X,M,F NA NA 7.40 0.00 5071.55 04/26/16 <0.002 <0.005 <0.005 0.012 <0.005 <0.010 0.181 2.2 NA NA 7.70 0.00 5071.25 08/08/16 <0.002 <0.005 <0.005 <0.005 <0.005 <0.005 0.066 1.4 NA NA 7.63 0.00 5071.32 05/09/17 <0.0010 <0.0010 <0.0010 <0.0050 <0.0010 <0.0030 <0.100 2.63 NA NA 7.07 0.00 5071.88 07/24/18 <0.005 <0.012 <0.005 <0.012 <0.012 <0.012 <0.125 <1.0 NA NA 8.69 0.00 5070.26 10/30/18 <0.005 <0.012 <0.005 <0.012 <0.012 <0.012 <0.125 1.7 NA NA 9.13 0.00 5069.82 01/09/19 <0.005 <0.012 <0.005 <0.012 <0.012 <0.012 <0.125 1.4 NA NA 9.80 0.00 5069.15 04/16/19 <0.005 <0.012 <0.005 <0.012 <0.012 <0.012 <0.125 1.6 NA NA 7.79 0.00 5071.16 11/13/19 0.00035 J <0.001 <0.001 <0.005 <0.001 <0.003 0.105 B 1.810 NA NA 8.53 0.00 5070.42 02/19/20 <0.00100 <0.00100 <0.00100 <0.00500 <0.00100 <0.00300 0.0888 BJ 1.890 J4 NA NA 8.97 0.00 5069.98 05/11/20 0.00260 0.000490 J <0.00100 0.00203 J <0.00100 0.000373 J 0.143 B 1.510 NA NA 7.78 0.00 5071.17 08/11/20 <0.00100 <0.00100 <0.00100 <0.00500 <0.00100 <0.00300 0.0451 J 1.520 NA NA 8.19 0.00 5070.76 09/27/21 <0.00100 <0.00100 <0.00100 0.00178 J <0.00100 <0.00300 0.0366 J 1.400 NA NA 9.18 0.00 5069.77 01/12/22 <0.00100 <0.00100 <0.00100 <0.00500 <0.00100 <0.00300 0.0691 J 1.000 NA NA 9.69 0.00 5069.26 05/18/22 <0.00100 <0.00100 <0.00100 <0.00500 <0.00100 <0.00300 0.0461 J 0.671 NA NA 8.52 0.00 5070.43 MW-21 05/09/17 0.303 0.0462 <0.0050 0.0582 0.00578 0.219 1.16 9.42 NA NA 22.95 0.00 5055.20 5078.15 07/24/18 5.23 0.630 <0.005 0.336 <0.012 0.041 7.25 7.6 NA NA 15.70 0.00 5062.45 10/30/18 5.16 0.478 <0.005 0.345 <0.012 0.033 7.00 9.9 NA NA 16.31 0.00 5061.84 01/09/19 2.02 0.311 <0.005 0.188 <0.012 0.027 3.57 10.7 NA NA 18.98 0.00 5059.17 04/16/19 0.228 <0.012 <0.005 <0.012 <0.012 <0.012 0.228 4.9 NA NA 15.27 0.00 5062.88 11/13/19 2.2600 0.00127 <0.001 0.104 J 0.00127 0.0142 5.860 12.300 NA NA 16.32 0.00 5061.83 02/19/20 3.190 0.138 <0.00100 0.0363 0.00151 0.0171 5.170 11.500 J4 NA NA 17.07 0.00 5061.08 05/11/20 1.910 0.135 <0.00100 0.0333 0.00178 0.0250 4.110 7.640 NA NA 16.04 0.00 5062.11 08/11/20 2.140 0.104 <0.0500 <0.250 <0.0500 0.0167 J 6.230 7.500 NA NA 15.91 0.00 5062.24 09/27/21 2.460 0.164 <0.0250 0.291 <0.0250 0.0376 J 7.250 13.900 NA NA 14.92 0.00 5063.23 01/12/22 3.260 0.213 <0.0250 0.157 <0.0250 0.0165 J 7.540 11.700 NA NA 16.30 0.00 5061.85 05/18/22 2.590 0.141 <0.0250 0.0587 J <0.0250 0.0231 J 8.400 8.150 NA NA 15.36 0.00 5062.79 09/29/22 2.150 0.198 <0.0500 0.178 J <0.0500 0.0285 J 5.020 12.900 NA NA 14.66 0.00 5063.49 05/10/23 1.710 0.169 <0.00100 0.102 J 0.00256 0.0124 3.410 12.400 NA NA 13.59 0.00 5064.56 08/17/23 1.110 0.0854 <0.0250 0.164 <0.0250 <0.0750 3.220 9.220 NA NA 13.19 0.00 5064.96 11/27/23 1.460 0.157 <0.00100 0.0449 0.00281 0.0136 3.330 9.140 NA NA 14.92 0.00 5063.23 02/12/24 1.020 0.101 <0.0200 0.0320 J <0.0200 0.0112 J 3.610 8.200 NA NA 14.93 0.00 5063.22 06/05/24 1.730 0.0822 <0.0200 0.0514 J <0.0200 0.0194 J 3.410 J3 9.020 NA NA 13.55 0.00 5064.60 09/11/24 1.580 0.170 <0.0200 0.0850 J <0.0200 0.0525 J 5.640 11.500 NA NA 14.27 0.00 5063.88 Well was destroyed 7 of 7 TABLE 1 GROUNDWATER ANALYTICAL AND ELEVATION DATA SUMMARY PALMER TIRE 395 SOUTH 200 EAST ROOSEVELT, UTAH SAMPLE ETHYL-NAPH-ORGANIC LOCATION DATE BENZENE BENZENE MTBE THALENE TOLUENE XYLENES TPH-GRO TPH-DRO LEAD LEAD DTW FPT WTE TOC (ft.)MM/DD/YY (mg/L)(mg/L)(mg/L)(mg/L)(mg/L)(mg/L)(mg/L)(mg/L)(mg/L)(mg/L)(feet)(feet)(feet) Initial Screening Levels 0.005 0.7 0.2 0.7 1.0 10 1.0 1.0 NE NE RBCA Tier 1 Screening 0.3 4.0 0.2 0.7 3.0 10 10 10 NE NE MW-21 12/04/24 0.924 0.116 <0.0200 0.0280 J 0.0248 0.0289 J 1.400 9.220 NA NA 14.99 0.00 5063.16 Cont. MW-22 05/09/17 0.0325 0.0162 <0.0010 0.0140 <0.0010 <0.0030 0.250 10.8 NA NA 12.90 0.00 5065.15 5078.05 07/24/18 0.012 <0.012 <0.005 <0.012 <0.012 <0.012 <0.125 3.7 NA NA 11.41 0.00 5066.64 10/30/18 0.012 <0.012 <0.005 <0.012 <0.012 <0.012 <0.125 4.4 NA NA 12.62 0.00 5065.43 01/09/19 <0.005 <0.012 <0.005 <0.012 <0.012 <0.012 <0.125 3.6 NA NA 14.99 0.00 5063.06 04/16/19 <0.005 <0.012 <0.005 <0.012 <0.012 <0.012 <0.125 1.6 NA NA 8.92 0.00 5069.13 11/13/19 0.00377 <0.001 <0.001 <0.005 <0.001 <0.003 0.107 B 4.670 NA NA 8.00 0.00 5070.05 02/19/20 0.00325 <0.00100 <0.00100 <0.00500 <0.00100 <0.00300 0.0904 J 4.430 J4 NA NA 8.35 0.00 5069.70 05/11/20 0.00287 0.000622 J <0.00100 <0.00500 <0.00100 0.00171 J 0.0997 BJ 4.680 NA NA 6.46 0.00 5071.59 08/11/20 0.00274 <0.00100 <0.00100 <0.00500 <0.00100 <0.00300 0.0776 J 2.670 NA NA 6.38 0.00 5071.67 09/27/21 0.00273 <0.00100 <0.00100 <0.00500 <0.00100 <0.00300 0.0832 J 4.020 NA NA 6.80 0.00 5071.25 01/12/22 0.00245 <0.00100 <0.00100 <0.00500 <0.00100 <0.00300 0.127 4.750 NA NA 7.57 0.00 5070.48 05/18/22 0.00193 <0.00100 <0.00100 <0.00500 <0.00100 <0.00300 0.0812 J 4.060 NA NA 6.44 0.00 5071.61 09/29/22 0.00299 0.000181 J 0.00425 0.00383 B,J <0.00100 0.000220 J 0.0936 J 3.850 NA NA 6.78 0.00 5071.27 05/10/23 0.00188 <0.00100 <0.00100 0.00281 J <0.00100 <0.00100 <1.000 4.010 NA NA 4.82 0.00 5073.23 08/17/23 0.00133 <0.00100 <0.00100 0.00182 J <0.00100 <0.00300 0.457 B,J 3.680 B,J NA NA 5.82 0.00 5072.23 11/27/23 0.00217 <0.00100 <0.00100 <0.00500 <0.00100 <0.00300 0.0673 J 2.810 NA NA 6.44 0.00 5071.61 02/12/24 NM NM NM 06/05/24 0.00183 <0.00100 <0.00100 <0.00500 <0.00100 <0.00300 0.0528 J, J3 3.270 NA NA 5.19 0.00 5072.86 09/11/24 0.00154 <0.00100 <0.00100 <0.00500 <0.00100 <0.00300 0.112 3.970 NA NA 5.39 0.00 5072.66 12/04/24 0.00197 B <0.00100 <0.00100 <0.00500 <0.00100 <0.00300 0.0379 J 3.900 NA NA 5.55 0.00 5072.50 SEEP 11/20/07 2.085 0.4350 0.1520 0.0112 0.0340 0.0571 NA NA NA NA ------ 12/04/07 2.350 0.315 J,P 0.128 P 0.013 J,P 0.025 P 0.045 J,P 6.85 F,P <2.0 F,X NA NA ------ 05/22/08 1.060 0.132 0.0790 0.216 0.023 0.133 5.05 F,J <2.0 F,X NA NA ------ 06/11/09 0.0038J 0.0054 0.0099 0.00028J 0.0012J 0.00197J 0.160 1.30 <0.005 <0.020†------ 09/30/09 ------ 04/13/10 <0.001 <0.001 0.0064 <0.001 <0.001 <0.001 <0.1 0.44 NA NA ------ 09/29/10 0.0004J <0.001 <0.001 0.00035J 0.00051J 0.0008J 0.016J 0.37 NA NA ------ 06/11/15 0.015 0.008 0.004 Jlo 0.005 0.003 0.018 0.371 F <1 X,M,F NA NA ------ PZ3 03/19/08 11.48 0.00 66.19 77.67 05/15/08 Dry ---- 5051.67 11/07/08 Dry ---- 02/04/09 Dry ---- 06/10/09 11.25 0.00 5040.42 04/13/10 Dry ---- 09/29/10 Dry ---- PZ-4 03/19/08 Dry ---- 76.91 05/15/08 Dry ---- 5050.91 11/07/08 12.13 0.00 5038.78 02/04/09 12.26 0.00 5038.65 06/10/09 11.25 0.00 5039.66 04/13/10 Dry ---- 09/29/10 Dry ---- Notes: TPH -GRO = Total Petroleum Hydrocarbons as Gasoline WTE = Water Table Elevation † = Method Detection Limit TOC = Top of Casing, Monitoring Well Surveyed Elevation RBCA = Risk Based Corrective Action NA = Not Analyzed < = Not detected above the laboratory reporting limit B = Analyte detected in Method Blank NE = Not Established UJ = Analyte not detected. Surrogate recovery below limits.F = No Dual Column Confirmation J = Estimated value between Method Detection Limit and Practical Quantitation Limit X = Hexane used for Extractions Jcal = Estimated value. Result above linear calibration range of instrument * = Duplicate Sample TPH -DRO = Total Petroleum Hydrocarbons as Diesel ** = Jar was broken during shipment Bold numbers indicate an exceedence of the Tier I Screening Level ***= Samples were inadvertently switched in the field P = Not Preserved in the field, HCL added at the time of receipt of samples at the laboratory FPT = Free Product Thickness Jlo = Estimated value. Results may be biased low. Spike or surrogate recovery below QC limits.E = Concentration exceeds calibration range of instrument J3 = The associated batch QC was outside the established quality control range for precision.mg/L = Milligrams per Liter J4 = Associated batch QC was outside the established quality control range for accuracy.DTW = Depth to Water Dry Dry Dry Not enough water volume to collect a sample Not enough water volume to collect a sample Not enough water volume to collect a sample Not enough water volume to collect a sample Dry Dry Dry Dry Well was under a pile of construction debris and could not be sampled Dry Dry Dry Not enough water volume to collect a sample APPENDIX A LABORATORY ANALYTICAL REPORTS ANALYTICAL REPORT December 16, 2024 One Atlas Sample Delivery Group:L1806378 Samples Received:12/06/2024 Project Number: Description:Palmer Tire Report To:Jim Coletta 1775 South 4130 West, Ste A Salt Lake City, UT 84104 Entire Report Reviewed By: December 16, 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 L1806378 12/16/24 19:30 1 of 21 December 17, 2024 Daphne Richards Project Manager ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE: One Atlas L1806378 12/17/24 09:04 1 of 21 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-11 L1806378-01 6 MW-14 L1806378-02 7 MW-15 L1806378-03 8 MW-18 L1806378-04 9 MW-19 L1806378-05 10 MW-21 L1806378-06 11 MW-22 L1806378-07 12 FIELD BLANK L1806378-08 13 TRIP BLANK L1806378-09 14 Qc: Quality Control Summary 15 Volatile Organic Compounds (GC) by Method 8015D/GRO 15 Volatile Organic Compounds (GC/MS) by Method 8260B 17 Semi-Volatile Organic Compounds (GC) by Method 3511/8015 18 Gl: Glossary of Terms 19 Al: Accreditations & Locations 20 Sc: Sample Chain of Custody 21 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 L1806378 12/16/24 19:30 2 of 21 ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE: One Atlas L1806378 12/17/24 09:04 2 of 21 SAMPLE SUMMARY Collected by Collected date/time Received date/time MW-11 L1806378-01 GW Olaf Questereit 12/04/24 16:00 12/06/24 08:00 Method Batch Dilution Preparation Analysis Analyst Location date/time date/time Volatile Organic Compounds (GC) by Method 8015D/GRO WG2416829 1 12/11/24 12:54 12/11/24 12:54 DWR Mt. Juliet, TN Volatile Organic Compounds (GC/MS) by Method 8260B WG2414864 1 12/08/24 14:31 12/08/24 14:31 DWR Mt. Juliet, TN Semi-Volatile Organic Compounds (GC) by Method 3511/8015 WG2416950 2 12/12/24 07:39 12/12/24 22:52 DMG Mt. Juliet, TN Collected by Collected date/time Received date/time MW-14 L1806378-02 GW Olaf Questereit 12/04/24 16:30 12/06/24 08:00 Method Batch Dilution Preparation Analysis Analyst Location date/time date/time Volatile Organic Compounds (GC) by Method 8015D/GRO WG2416829 20 12/11/24 19:55 12/11/24 19:55 DWR Mt. Juliet, TN Volatile Organic Compounds (GC/MS) by Method 8260B WG2414864 1 12/08/24 14:53 12/08/24 14:53 DWR Mt. Juliet, TN Semi-Volatile Organic Compounds (GC) by Method 3511/8015 WG2416950 5 12/12/24 07:39 12/13/24 07:06 DMG Mt. Juliet, TN Collected by Collected date/time Received date/time MW-15 L1806378-03 GW Olaf Questereit 12/04/24 16:15 12/06/24 08:00 Method Batch Dilution Preparation Analysis Analyst Location date/time date/time Volatile Organic Compounds (GC) by Method 8015D/GRO WG2416829 10 12/11/24 20:17 12/11/24 20:17 DWR Mt. Juliet, TN Volatile Organic Compounds (GC/MS) by Method 8260B WG2414864 1 12/08/24 15:14 12/08/24 15:14 DWR Mt. Juliet, TN Semi-Volatile Organic Compounds (GC) by Method 3511/8015 WG2416950 5 12/12/24 07:39 12/13/24 07:26 DMG Mt. Juliet, TN Collected by Collected date/time Received date/time MW-18 L1806378-04 GW Olaf Questereit 12/04/24 15:15 12/06/24 08:00 Method Batch Dilution Preparation Analysis Analyst Location date/time date/time Volatile Organic Compounds (GC) by Method 8015D/GRO WG2416829 1 12/11/24 13:35 12/11/24 13:35 DWR Mt. Juliet, TN Volatile Organic Compounds (GC/MS) by Method 8260B WG2414864 1 12/08/24 15:36 12/08/24 15:36 DWR Mt. Juliet, TN Semi-Volatile Organic Compounds (GC) by Method 3511/8015 WG2416950 10 12/12/24 07:39 12/13/24 04:57 DMG Mt. Juliet, TN Collected by Collected date/time Received date/time MW-19 L1806378-05 GW Olaf Questereit 12/04/24 15:00 12/06/24 08:00 Method Batch Dilution Preparation Analysis Analyst Location date/time date/time Volatile Organic Compounds (GC) by Method 8015D/GRO WG2416829 1 12/11/24 13:57 12/11/24 13:57 DWR Mt. Juliet, TN Volatile Organic Compounds (GC/MS) by Method 8260B WG2414864 1 12/08/24 15:57 12/08/24 15:57 DWR Mt. Juliet, TN Semi-Volatile Organic Compounds (GC) by Method 3511/8015 WG2416950 1 12/12/24 07:39 12/12/24 23:54 DMG Mt. Juliet, TN Collected by Collected date/time Received date/time MW-21 L1806378-06 GW Olaf Questereit 12/04/24 15:30 12/06/24 08:00 Method Batch Dilution Preparation Analysis Analyst Location date/time date/time Volatile Organic Compounds (GC) by Method 8015D/GRO WG2416829 1 12/11/24 14:29 12/11/24 14:29 DWR Mt. Juliet, TN Volatile Organic Compounds (GC/MS) by Method 8260B WG2414864 20 12/08/24 18:48 12/08/24 18:48 DWR Mt. Juliet, TN Semi-Volatile Organic Compounds (GC) by Method 3511/8015 WG2416950 5 12/12/24 07:39 12/13/24 12:58 MAA 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 L1806378 12/16/24 19:30 3 of 21 ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE: One Atlas L1806378 12/17/24 09:04 3 of 21 SAMPLE SUMMARY Collected by Collected date/time Received date/time MW-22 L1806378-07 GW Olaf Questereit 12/04/24 15:45 12/06/24 08:00 Method Batch Dilution Preparation Analysis Analyst Location date/time date/time Volatile Organic Compounds (GC) by Method 8015D/GRO WG2417339 1 12/12/24 02:17 12/12/24 02:17 JHH Mt. Juliet, TN Volatile Organic Compounds (GC/MS) by Method 8260B WG2414864 1 12/08/24 16:18 12/08/24 16:18 DWR Mt. Juliet, TN Semi-Volatile Organic Compounds (GC) by Method 3511/8015 WG2416950 1 12/12/24 07:39 12/13/24 00:35 DMG Mt. Juliet, TN Collected by Collected date/time Received date/time FIELD BLANK L1806378-08 GW Olaf Questereit 12/04/24 15:55 12/06/24 08:00 Method Batch Dilution Preparation Analysis Analyst Location date/time date/time Volatile Organic Compounds (GC) by Method 8015D/GRO WG2417339 1 12/12/24 01:55 12/12/24 01:55 JHH Mt. Juliet, TN Volatile Organic Compounds (GC/MS) by Method 8260B WG2414864 1 12/08/24 10:06 12/08/24 10:06 DWR Mt. Juliet, TN Semi-Volatile Organic Compounds (GC) by Method 3511/8015 WG2416950 1 12/12/24 07:39 12/13/24 00:55 DMG Mt. Juliet, TN Collected by Collected date/time Received date/time TRIP BLANK L1806378-09 GW Olaf Questereit 12/04/24 00:00 12/06/24 08:00 Method Batch Dilution Preparation Analysis Analyst Location date/time date/time Volatile Organic Compounds (GC/MS) by Method 8260B WG2414864 1 12/08/24 09:44 12/08/24 09:44 DWR 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 L1806378 12/16/24 19:30 4 of 21 ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE: One Atlas L1806378 12/17/24 09:04 4 of 21 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 L1806378-01 MW-11 3511/8015 L1806378-02 MW-14 3511/8015 L1806378-03 MW-15 3511/8015 L1806378-04 MW-18 3511/8015 L1806378-06 MW-21 3511/8015 L1806378-07 MW-22 3511/8015 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 L1806378 12/16/24 19:30 5 of 21 Daphne Richards Project Manager ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE: One Atlas L1806378 12/17/24 09:04 5 of 21 SAMPLE RESULTS - 01 L1806378 MW-11 Collected date/time: 12/04/24 16:00 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 428 31.4 100 1 12/11/2024 12:54 WG2416829 (S) a,a,a-Trifluorotoluene(FID)100 78.0-120 12/11/2024 12:54 WG2416829 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 141 0.0941 1.00 1 12/08/2024 14:31 WG2414864 Toluene 1.07 0.278 1.00 1 12/08/2024 14:31 WG2414864 Ethylbenzene 22.1 0.137 1.00 1 12/08/2024 14:31 WG2414864 Total Xylenes 1.18 J 0.174 3.00 1 12/08/2024 14:31 WG2414864 Methyl tert-butyl ether U 0.101 1.00 1 12/08/2024 14:31 WG2414864 Naphthalene 1.98 J 1.00 5.00 1 12/08/2024 14:31 WG2414864 (S) Toluene-d8 103 80.0-120 12/08/2024 14:31 WG2414864 (S) 4-Bromofluorobenzene 96.6 77.0-126 12/08/2024 14:31 WG2414864 (S) 1,2-Dichloroethane-d4 116 70.0-130 12/08/2024 14:31 WG2414864 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 9940 49.4 200 2 12/12/2024 22:52 WG2416950 (S) o-Terphenyl 102 52.0-156 12/12/2024 22:52 WG2416950 Sample Narrative: L1806378-01 WG2416950: Dilution due to matrix impact during extraction procedure. 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 L1806378 12/16/24 19:30 6 of 21 ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE: One Atlas L1806378 12/17/24 09:04 6 of 21 SAMPLE RESULTS - 02 L1806378 MW-14 Collected date/time: 12/04/24 16:30 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 8880 628 2000 20 12/11/2024 19:55 WG2416829 (S) a,a,a-Trifluorotoluene(FID)113 78.0-120 12/11/2024 19:55 WG2416829 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 8.27 0.0941 1.00 1 12/08/2024 14:53 WG2414864 Toluene 0.574 J 0.278 1.00 1 12/08/2024 14:53 WG2414864 Ethylbenzene 1.85 0.137 1.00 1 12/08/2024 14:53 WG2414864 Total Xylenes 23.8 0.174 3.00 1 12/08/2024 14:53 WG2414864 Methyl tert-butyl ether 71.2 0.101 1.00 1 12/08/2024 14:53 WG2414864 Naphthalene 27.6 1.00 5.00 1 12/08/2024 14:53 WG2414864 (S) Toluene-d8 91.1 80.0-120 12/08/2024 14:53 WG2414864 (S) 4-Bromofluorobenzene 89.9 77.0-126 12/08/2024 14:53 WG2414864 (S) 1,2-Dichloroethane-d4 143 J1 70.0-130 12/08/2024 14:53 WG2414864 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 9200 123 500 5 12/13/2024 07:06 WG2416950 (S) o-Terphenyl 111 52.0-156 12/13/2024 07:06 WG2416950 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 L1806378 12/16/24 19:30 7 of 21 ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE: One Atlas L1806378 12/17/24 09:04 7 of 21 SAMPLE RESULTS - 03 L1806378 MW-15 Collected date/time: 12/04/24 16:15 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 718 J 314 1000 10 12/11/2024 20:17 WG2416829 (S) a,a,a-Trifluorotoluene(FID)102 78.0-120 12/11/2024 20:17 WG2416829 Sample Narrative: L1806378-03 WG2416829: Lowest possible dilution due to sample foaming. 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 63.4 0.0941 1.00 1 12/08/2024 15:14 WG2414864 Toluene U 0.278 1.00 1 12/08/2024 15:14 WG2414864 Ethylbenzene U 0.137 1.00 1 12/08/2024 15:14 WG2414864 Total Xylenes U 0.174 3.00 1 12/08/2024 15:14 WG2414864 Methyl tert-butyl ether 9.15 0.101 1.00 1 12/08/2024 15:14 WG2414864 Naphthalene U 1.00 5.00 1 12/08/2024 15:14 WG2414864 (S) Toluene-d8 103 80.0-120 12/08/2024 15:14 WG2414864 (S) 4-Bromofluorobenzene 106 77.0-126 12/08/2024 15:14 WG2414864 (S) 1,2-Dichloroethane-d4 113 70.0-130 12/08/2024 15:14 WG2414864 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 18400 123 500 5 12/13/2024 07:26 WG2416950 (S) o-Terphenyl 130 52.0-156 12/13/2024 07:26 WG2416950 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 L1806378 12/16/24 19:30 8 of 21 ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE: One Atlas L1806378 12/17/24 09:04 8 of 21 SAMPLE RESULTS - 04 L1806378 MW-18 Collected date/time: 12/04/24 15:15 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 415 31.4 100 1 12/11/2024 13:35 WG2416829 (S) a,a,a-Trifluorotoluene(FID)104 78.0-120 12/11/2024 13:35 WG2416829 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 0.155 B J 0.0941 1.00 1 12/08/2024 15:36 WG2414864 Toluene U 0.278 1.00 1 12/08/2024 15:36 WG2414864 Ethylbenzene 0.244 J 0.137 1.00 1 12/08/2024 15:36 WG2414864 Total Xylenes 1.83 J 0.174 3.00 1 12/08/2024 15:36 WG2414864 Methyl tert-butyl ether U 0.101 1.00 1 12/08/2024 15:36 WG2414864 Naphthalene U 1.00 5.00 1 12/08/2024 15:36 WG2414864 (S) Toluene-d8 104 80.0-120 12/08/2024 15:36 WG2414864 (S) 4-Bromofluorobenzene 93.4 77.0-126 12/08/2024 15:36 WG2414864 (S) 1,2-Dichloroethane-d4 106 70.0-130 12/08/2024 15:36 WG2414864 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 4190 B 247 1000 10 12/13/2024 04:57 WG2416950 (S) o-Terphenyl 107 52.0-156 12/13/2024 04:57 WG2416950 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 L1806378 12/16/24 19:30 9 of 21 ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE: One Atlas L1806378 12/17/24 09:04 9 of 21 SAMPLE RESULTS - 05 L1806378 MW-19 Collected date/time: 12/04/24 15:00 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 456 31.4 100 1 12/11/2024 13:57 WG2416829 (S) a,a,a-Trifluorotoluene(FID)104 78.0-120 12/11/2024 13:57 WG2416829 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 0.486 B J 0.0941 1.00 1 12/08/2024 15:57 WG2414864 Toluene U 0.278 1.00 1 12/08/2024 15:57 WG2414864 Ethylbenzene U 0.137 1.00 1 12/08/2024 15:57 WG2414864 Total Xylenes U 0.174 3.00 1 12/08/2024 15:57 WG2414864 Methyl tert-butyl ether 1.05 0.101 1.00 1 12/08/2024 15:57 WG2414864 Naphthalene 4.83 J 1.00 5.00 1 12/08/2024 15:57 WG2414864 (S) Toluene-d8 102 80.0-120 12/08/2024 15:57 WG2414864 (S) 4-Bromofluorobenzene 96.6 77.0-126 12/08/2024 15:57 WG2414864 (S) 1,2-Dichloroethane-d4 115 70.0-130 12/08/2024 15:57 WG2414864 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 1130 24.7 100 1 12/12/2024 23:54 WG2416950 (S) o-Terphenyl 121 52.0-156 12/12/2024 23:54 WG2416950 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 L1806378 12/16/24 19:30 10 of 21 ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE: One Atlas L1806378 12/17/24 09:04 10 of 21 SAMPLE RESULTS - 06 L1806378 MW-21 Collected date/time: 12/04/24 15:30 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 1400 31.4 100 1 12/11/2024 14:29 WG2416829 (S) a,a,a-Trifluorotoluene(FID)98.1 78.0-120 12/11/2024 14:29 WG2416829 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 924 1.88 20.0 20 12/08/2024 18:48 WG2414864 Toluene 24.8 5.56 20.0 20 12/08/2024 18:48 WG2414864 Ethylbenzene 116 2.74 20.0 20 12/08/2024 18:48 WG2414864 Total Xylenes 28.9 J 3.48 60.0 20 12/08/2024 18:48 WG2414864 Methyl tert-butyl ether U 2.02 20.0 20 12/08/2024 18:48 WG2414864 Naphthalene 28.0 J 20.0 100 20 12/08/2024 18:48 WG2414864 (S) Toluene-d8 104 80.0-120 12/08/2024 18:48 WG2414864 (S) 4-Bromofluorobenzene 91.6 77.0-126 12/08/2024 18:48 WG2414864 (S) 1,2-Dichloroethane-d4 112 70.0-130 12/08/2024 18:48 WG2414864 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 9220 123 500 5 12/13/2024 12:58 WG2416950 (S) o-Terphenyl 133 52.0-156 12/13/2024 12:58 WG2416950 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 L1806378 12/16/24 19:30 11 of 21 ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE: One Atlas L1806378 12/17/24 09:04 11 of 21 SAMPLE RESULTS - 07 L1806378 MW-22 Collected date/time: 12/04/24 15:45 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 37.9 J 31.4 100 1 12/12/2024 02:17 WG2417339 (S) a,a,a-Trifluorotoluene(FID)97.9 78.0-120 12/12/2024 02:17 WG2417339 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 1.97 B 0.0941 1.00 1 12/08/2024 16:18 WG2414864 Toluene U 0.278 1.00 1 12/08/2024 16:18 WG2414864 Ethylbenzene U 0.137 1.00 1 12/08/2024 16:18 WG2414864 Total Xylenes U 0.174 3.00 1 12/08/2024 16:18 WG2414864 Methyl tert-butyl ether U 0.101 1.00 1 12/08/2024 16:18 WG2414864 Naphthalene U 1.00 5.00 1 12/08/2024 16:18 WG2414864 (S) Toluene-d8 105 80.0-120 12/08/2024 16:18 WG2414864 (S) 4-Bromofluorobenzene 92.1 77.0-126 12/08/2024 16:18 WG2414864 (S) 1,2-Dichloroethane-d4 112 70.0-130 12/08/2024 16:18 WG2414864 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 3900 24.7 100 1 12/13/2024 00:35 WG2416950 (S) o-Terphenyl 113 52.0-156 12/13/2024 00:35 WG2416950 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 L1806378 12/16/24 19:30 12 of 21 ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE: One Atlas L1806378 12/17/24 09:04 12 of 21 SAMPLE RESULTS - 08 L1806378 FIELD BLANK Collected date/time: 12/04/24 15:55 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 U 31.4 100 1 12/12/2024 01:55 WG2417339 (S) a,a,a-Trifluorotoluene(FID)99.0 78.0-120 12/12/2024 01:55 WG2417339 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 12/08/2024 10:06 WG2414864 Toluene U 0.278 1.00 1 12/08/2024 10:06 WG2414864 Ethylbenzene U 0.137 1.00 1 12/08/2024 10:06 WG2414864 Total Xylenes U 0.174 3.00 1 12/08/2024 10:06 WG2414864 Methyl tert-butyl ether U 0.101 1.00 1 12/08/2024 10:06 WG2414864 Naphthalene U 1.00 5.00 1 12/08/2024 10:06 WG2414864 (S) Toluene-d8 102 80.0-120 12/08/2024 10:06 WG2414864 (S) 4-Bromofluorobenzene 88.7 77.0-126 12/08/2024 10:06 WG2414864 (S) 1,2-Dichloroethane-d4 123 70.0-130 12/08/2024 10:06 WG2414864 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 95.8 B J 24.7 100 1 12/13/2024 00:55 WG2416950 (S) o-Terphenyl 117 52.0-156 12/13/2024 00:55 WG2416950 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 L1806378 12/16/24 19:30 13 of 21 ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE: One Atlas L1806378 12/17/24 09:04 13 of 21 SAMPLE RESULTS - 09 L1806378 TRIP BLANK Collected date/time: 12/04/24 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 12/08/2024 09:44 WG2414864 Toluene U 0.278 1.00 1 12/08/2024 09:44 WG2414864 Ethylbenzene U 0.137 1.00 1 12/08/2024 09:44 WG2414864 Total Xylenes U 0.174 3.00 1 12/08/2024 09:44 WG2414864 Methyl tert-butyl ether U 0.101 1.00 1 12/08/2024 09:44 WG2414864 Naphthalene U 1.00 5.00 1 12/08/2024 09:44 WG2414864 (S) Toluene-d8 103 80.0-120 12/08/2024 09:44 WG2414864 (S) 4-Bromofluorobenzene 86.3 77.0-126 12/08/2024 09:44 WG2414864 (S) 1,2-Dichloroethane-d4 117 70.0-130 12/08/2024 09:44 WG2414864 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 L1806378 12/16/24 19:30 14 of 21 ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE: One Atlas L1806378 12/17/24 09:04 14 of 21 QUALITY CONTROL SUMMARYWG2416829 Volatile Organic Compounds (GC) by Method 8015D/GRO L1806378-01,02,03,04,05,06 Method Blank (MB) (MB) R4156965-3 12/11/24 10:00 MB Result MB Qualifier MB MDL MB RDL Analyte ug/l ug/l ug/l TPH (GC/FID) Low Fraction U 31.4 100 (S) a,a,a-Trifluorotoluene(FID)101 78.0-120 Laboratory Control Sample (LCS) • Laboratory Control Sample Duplicate (LCSD) (LCS) R4156965-1 12/11/24 08:35 • (LCSD) R4156965-2 12/11/24 09:16 Spike Amount LCS Result LCSD Result LCS Rec.LCSD Rec.Rec. Limits LCS Qualifier LCSD Qualifier RPD RPD Limits Analyte ug/l ug/l ug/l %%%%% TPH (GC/FID) Low Fraction 5000 5030 5620 101 112 72.0-127 11.1 20 (S) a,a,a-Trifluorotoluene(FID) 100 107 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 L1806378 12/16/24 19:30 15 of 21 ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE: One Atlas L1806378 12/17/24 09:04 15 of 21 QUALITY CONTROL SUMMARYWG2417339 Volatile Organic Compounds (GC) by Method 8015D/GRO L1806378-07,08 Method Blank (MB) (MB) R4157275-2 12/12/24 01:33 MB Result MB Qualifier MB MDL MB RDL Analyte ug/l ug/l ug/l TPH (GC/FID) Low Fraction U 31.4 100 (S) a,a,a-Trifluorotoluene(FID)99.7 78.0-120 Laboratory Control Sample (LCS) (LCS) R4157275-1 12/12/24 00:23 Spike Amount LCS Result LCS Rec.Rec. Limits LCS Qualifier Analyte ug/l ug/l %% TPH (GC/FID) Low Fraction 5000 5070 101 72.0-127 (S) a,a,a-Trifluorotoluene(FID) 104 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 L1806378 12/16/24 19:30 16 of 21 ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE: One Atlas L1806378 12/17/24 09:04 16 of 21 QUALITY CONTROL SUMMARYWG2414864 Volatile Organic Compounds (GC/MS) by Method 8260B L1806378-01,02,03,04,05,06,07,08,09 Method Blank (MB) (MB) R4155368-3 12/08/24 08:18 MB Result MB Qualifier MB MDL MB RDL Analyte ug/l ug/l ug/l Benzene 0.263 J 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 101 80.0-120 (S) 4-Bromofluorobenzene 90.1 77.0-126 (S) 1,2-Dichloroethane-d4 120 70.0-130 Laboratory Control Sample (LCS) • Laboratory Control Sample Duplicate (LCSD) (LCS) R4155368-1 12/07/24 22:23 • (LCSD) R4155368-2 12/07/24 22:44 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 5.24 5.07 105 101 70.0-123 3.30 20 Toluene 5.00 5.10 4.84 102 96.8 79.0-120 5.23 20 Ethylbenzene 5.00 4.97 4.65 99.4 93.0 79.0-123 6.65 20 Total Xylenes 15.0 14.9 14.0 99.3 93.3 79.0-123 6.23 20 Methyl tert-butyl ether 5.00 5.08 4.91 102 98.2 68.0-125 3.40 20 Naphthalene 5.00 4.43 4.28 88.6 85.6 54.0-135 J J 3.44 20 (S) Toluene-d8 103 102 80.0-120 (S) 4-Bromofluorobenzene 92.6 91.9 77.0-126 (S) 1,2-Dichloroethane-d4 115 116 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 L1806378 12/16/24 19:30 17 of 21 ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE: One Atlas L1806378 12/17/24 09:04 17 of 21 QUALITY CONTROL SUMMARYWG2416950 Semi-Volatile Organic Compounds (GC) by Method 3511/8015 L1806378-01,02,03,04,05,06,07,08 Method Blank (MB) (MB) R4157373-1 12/12/24 19:13 MB Result MB Qualifier MB MDL MB RDL Analyte ug/l ug/l ug/l TPH (GC/FID) High Fraction 54.7 J 24.7 100 (S) o-Terphenyl 118 52.0-156 Laboratory Control Sample (LCS) • Laboratory Control Sample Duplicate (LCSD) (LCS) R4157373-2 12/12/24 19:33 • (LCSD) R4157373-3 12/12/24 19:53 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 1570 1580 105 105 50.0-150 0.635 20 (S) o-Terphenyl 120 124 52.0-156 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 L1806378 12/16/24 19:30 18 of 21 ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE: One Atlas L1806378 12/17/24 09:04 18 of 21 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 B The same analyte is found in the associated blank. J The identification of the analyte is acceptable; the reported value is an estimate. J1 Surrogate recovery limits have been exceeded; values are outside upper control limits. 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 L1806378 12/16/24 19:30 19 of 21 ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE: One Atlas L1806378 12/17/24 09:04 19 of 21 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 L1806378 12/16/24 19:30 20 of 21 ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE: One Atlas L1806378 12/17/24 09:04 20 of 21