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Home My WebLink AboutDERR-2024-0046111/3 Arcadis U.S., Inc. 2100 Georgetown Drive Suite 402 Sewickley, PA 15143 United States Phone: 724 742 9180 www.arcadis.com Mr. Mark Crim Utah Department of Environmental Quality Division of Environmental Response and Remediation 195 North 1950 West Salt Lake City, UT 84116 Date: February 2, 2024 Our Ref: 30063825 Subject: 2023 Groundwater Monitoring Report Former Chevron Marina #7-2804 Halls Crossing Marina Lake Powell, Utah Dear Mr. Crim, On behalf of Chevron Environmental Management Company (CEMC), Arcadis U.S., Inc. (Arcadis) has prepared this Groundwater Monitoring Report for the Utah Department of Environmental Response and Remediation (DERR) to summarize the 2023 groundwater monitoring activities performed at the former Chevron Marina #7- 2804 located at Halls Crossing Marina, Lake Powell, Utah (site; Figures 1 and 2) as requested by DERR in the October 5, 2023 No Further Action Review letter (Appendix A). Introduction On November 8 and 9, 2023, Arcadis mobilized to the site to perform the requested groundwater monitoring event. The visit consisted of collecting gauging remediation wells and performing groundwater monitoring activities. Details of the sampling are presented below. A detailed site plan is presented as Figure 3. Remediation System The onsite remediation system consists of a soil vapor extraction (SVE) system in the vicinity of the former underground storage tanks (Figure 3). The SVE system consisted of a 2-horsepower regenerative vacuum blower, connected to vapor extraction wells VW-1, VW-2, VW-3, VRB-8, VRB-8A, VRB-9, VRB-9A, VRB-9A, VRB-11, VRB-11A, VRB-12, and VRB-12A; four wells were operated at one time to optimize performance. The SVE system was installed and began operation in July 1993 and was shut down in September 2021 as soil vapor analytical data reached asymptotic levels. In addition, in June 2008, a passive aeration system consisting of a drop tube was installed in two vapor recovery wells with historically measurable product (VRB-8 and VRB-11) to facilitate in-situ volatilization of remaining liquid phase hydrocarbons (LPH). The passive aeration system was decommissioned on March 16, 2020, due to asymptotic levels observed in groundwater. Groundwater Gauging/Monitoring Per the October 5, 2023, NFA Review Letter, Arcadis mobilized to the site on November 8 and 9, 2023, to sample VRB-8 and VRB-11. Existing vapor wells VW-1, VW-2, VW-3, VRB-2, VRB-8A, VRB-9A, VRB-11A, and VRB-12 and monitoring wells MRB-4, and MRB-5 were gauged on November 8, 2023. Wells VRB-8, VRB-9, and VRB-11 Mr. Mark Crim Utah Department of Environmental Quality Date: February 2, 2024 www.arcadis.com 2/3 4Q 2023_Halls Crossing Report_V2 were identified during gauging activities as wells with potentially enough well volume to collect groundwater samples. Wells MRB-4, MRB-5, VRB-9A, VW-1, VW-2 and VW-3 were found to be dry. Figure 4 shows Lake Powell levels plotted with depth-to-water and water elevations measured at monitoring wells MRB-4 and MRB-5. Since 2015, groundwater elevations in the lake have fluctuated, with historically low values observed in March 2019 (similar elevations were previously observed in September 2004). Gauging data for monitoring wells MRB-4 and MRB-5 is available starting in July 1993; it appears gauging discontinued following the September 2015 event but was resumed in May 2019 by Arcadis. Seven groundwater monitoring events have been conducted since May 2019; and both wells (MRB-4 and MRB-5) have been dry during events conducted from 2019 to present. Previous sampling events consistently demonstrated insufficient recharge for three volume purge sampling; therefore, wells are typically purged dry and a grab groundwater sample is collected the next day. Arcadis was able to purge one well volume from VRB-8 and one well volume from VRB-11 on the first day of the event. There was not sufficient recharge by the end of the first day to collect samples. On the second day, the gauging data of VRB-8 and VRB-11 indicated sufficient recharge, was achieved, and Arcadis collected a sample from each well. Based on the insufficient water volume at VRB-9, the well was not purged, and a grab groundwater sample was collected. Groundwater Monitoring Results During the November 2023 event, groundwater samples from wells VRB-8, VRB-9 and VRB-11 were submitted for the following analysis: Total petroleum hydrocarbons as gasoline range organics (TPH-GRO) by EPA Method 8015D TPH as diesel range organics (TPH-DRO) by EPA Method 3511/8015D, with and without silica gel treatment (SGT) Benzene, toluene, ethylbenzene, and total xylenes (sum of o-xylenes and m- and p-xylenes) (BTEX), naphthalene and methyl tert-butyl ether (MTBE) by EPA Method 8260B Laboratory analytical results are summarized in Table 1. Groundwater sampling field forms are included in Appendix B. While it’s difficult to trend concentrations detected from the “perched” groundwater zone where the vapor wells are either not able to be purged or they are insufficiently purged due to the lack of recharge, the groundwater analytical results collected on November 8 and 9, 2023, from VRB-8, VRB-9 and VRB-11, are generally consistent with historic concentrations and are consistent with concentrations detected prior to the system being turned off in September 2021. The laboratory analytical results and chain-of-custody documentation are included in Appendix C. Closing Based on the sampling event, a majority of the wells at the site remain dry and there is limited recharge in the shallow wells. Groundwater elevations in Lake Powell appear to fluctuate and remain at a lower elevation than the deepest well (MRB-5). Groundwater analytical data reported for wells VRB-8, VRB-9 and VRB-11 indicate select constituent concentrations remain above DERR ISLs and are reported at similar concentrations as previous groundwater sampling events. Based on the results, CEMC and Arcadis will continue preparing an environmental covenant to support a NFA for the property. Mr. Mark Crim Utah Department of Environmental Quality Date: February 2, 2024 www.arcadis.com 3/3 4Q 2023_Halls Crossing Report_V2 If you have questions or comments regarding this report, please contact Taura Nichols by telephone at 312.575.3723 or by email at taura.nichols@arcadis.com or Gerald Robinson at 724.934.9507 or by email at gerald.robinson@arcadis.com. Sincerely, Arcadis U.S., Inc. Taura Nichols, P.E. Gerald A. Robinson Utah PE License #8568538-2202 Project Manager Certified Consultant No. CC-024 CC. John Amato, CEMC Chris Cook –National Park Service, (email: Chris_Cook@nps.gov) Enclosures: Tables 1. Groundwater Gauging and Analytical Data Figures 1. Site Location Map 2. Site Map – Surrounding Area 3. Well Location Map 4. Lake Powell and Monitoring Well Hydrographs (1993-2023) Appendices A. October 5, 2023 No Further Action Review Letter B. Groundwater Sampling and Gauging Logs Field Forms C. Laboratory Analytical Report and Chain-of-Custody Documentation Tables Table 1 Groundwater Gauging and Analytical Data Former Chevron Marina #7-2804 Halls Crossing Marina Lake Powell, Utah Sample Ethyl-Total TPH-TPH-TPH-Product Water Location benzene Xylenes GRO DRO DRO (w/SGT)DTW Thickness Elevation TOC Date (mg/L)(mg/L)(mg/L)(mg/L)(mg/L)(mg/L)(mg/L)(mg/L)(mg/L)(BTOC feet)(feet)(feet amsl) 0.005 1 0.70 10 0.70 0.20 1.00 1.00 1.00 ------ 0.3 3 4 10 0.70 0.20 10 10 10 ------ MRB-4 7/1/1993 ND ND ND ND NA NA ND NA NA 61.98 0.00 3,637.97 TOC:10/20/1993 ND ND ND ND NA NA ND NA NA 64.66 0.00 3,635.29 3,699.95 3/17/1994 ND ND ND ND NA NA ND NA NA 52.4 0.00 3,647.55 6/9/1994 ND ND ND ND NA NA ND NA NA 52.25 0.00 3,647.70 12/15/1994 ND ND ND ND NA NA ND NA NA 51.89 0.00 3,648.06 3/8/1995 ND ND ND ND NA NA ND NA NA 53.68 0.00 3,646.27 6/7/1995 ND ND ND ND NA NA ND NA NA 54.03 0.00 3,645.92 12/6/1995 ND ND ND ND NA NA ND NA NA 28.38 0.00 3,671.57 5/30/1996 ND ND ND ND NA NA ND NA NA 32.44 0.00 3,667.51 12/18/1996 ND ND ND ND NA NA ND NA NA 30.83 0.00 3,669.12 6/18/1997 ND ND ND ND ND ND ND NA NA 29.66 0.00 3,670.29 12/18/1997 ND ND ND ND ND ND ND NA NA 22.00 0.00 3,677.95 6/17/1998 ND ND ND ND ND ND ND NA NA 19.34 0.00 3,680.61 12/22/1998 ND ND ND ND ND ND ND NA NA 21.72 0.00 3,678.23 6/21/1999 ND ND ND ND ND ND ND NA NA 21.48 0.00 3,678.47 11/12/1999 <0.0005 <0.0005 <0.0005 <0.0005 NS <0.002 <0.05 NA NA 17.81 0.00 3,682.14 5/19/2000 <0.002 <0.002 <0.002 <0.006 <0.002 <0.002 <0.5 NA NA 28.09 0.00 3,671.86 11/9/2000 <0.002 <0.002 <0.002 <0.006 <0.002 <0.002 <0.5 NA NA 27.15 0.00 3,672.80 5/3/2001 <0.002 <0.002 <0.002 <0.006 <0.002 <0.002 <0.5 NA NA 38.8 0.00 3,661.15 9/18/2002 <0.0005 <0.0005 <0.0005 <0.0015 NA <0.0025 <0.05 NA NA 51.85 0.00 3,648.10 9/17/2003 <0.0005 <0.0005 <0.0005 <0.0005 <0.001 0.0005 <0.05 NA NA 62.25 0.00 3,637.70 9/22/2004 <0.0005 <0.0005 <0.0005 <0.0005 <0.001 0.0005 <0.05 0.45 NA 70.74 0.00 3,629.21 10/6/2005 <0.0005 0.0009 <0.0005 0.003 <0.001 <0.0005 <0.05 0.63 NA 74.05 0.00 3,625.90 10/5/2006 DRY DRY DRY DRY DRY DRY DRY DRY NA DRY (75.5')0.00 NC 10/18/2007 DRY DRY DRY DRY DRY DRY DRY DRY NA DRY (75.0')0.00 NC 9/16/2008 DRY DRY DRY DRY DRY DRY DRY DRY NA DRY (75.0')0.00 NC 9/28/2009 DRY DRY DRY DRY DRY DRY DRY DRY NA DRY (75.12')0.00 NC 9/26/2010 DRY DRY DRY DRY DRY DRY DRY DRY NA 74.2 0.00 3,625.75 12/10/2011 <0.0005 <0.0005 <0.0005 <0.0005 <0.001 <0.0005 <0.022 <0.50 NA 63.45 0.00 3,636.50 12/10/2012 DRY DRY DRY DRY DRY DRY DRY DRY NA 74.92 0.00 3,625.03 6/23/2014 <0.0005 <0.0005 <0.0005 <0.0005 <0.001 <0.0005 <0.022 NA NA 74.81 0.00 3,625.14 9/28/2015 DRY DRY DRY DRY DRY DRY DRY DRY NA DRY (75.3')0.00 NC 5/16/2019 DRY DRY DRY DRY DRY DRY DRY DRY NA DRY (75.2')0.00 NC 12/10/2019 DRY DRY DRY DRY DRY DRY DRY DRY NA DRY (76.1')0.00 NC 5/5/2020 DRY DRY DRY DRY DRY DRY DRY DRY NA DRY(75.2)0.00 NC 10/6/2020 DRY DRY DRY DRY DRY DRY DRY DRY NA DRY(75.2)0.00 NC 3/23/2021 DRY DRY DRY DRY DRY DRY DRY DRY NA DRY (75.4)0.00 NC 5/25/2021 DRY DRY DRY DRY DRY DRY DRY DRY NA DRY (75.4)0.00 NC 8/3/2021 DRY DRY DRY DRY DRY DRY DRY DRY NA DRY (75.38)0.00 NC 11/4/2021 DRY DRY DRY DRY DRY DRY DRY DRY NA DRY (75.38)0.00 NC MRB-4 11/8/2023 DRY DRY DRY DRY DRY DRY DRY DRY NA DRY (75.26)0.00 NC See Notes on Page 8. Naphthalene DERR ISL: Tier 1 SL: Toluene MTBEBenzene https://arcadiso365.sharepoint.com/teams/portfolio-817733/Shared Documents/72804 Halls Crossing/9 - Deliverables/2023/Tables/72804 4Q23 Table_V0 1/8 Table 1 Groundwater Gauging and Analytical Data Former Chevron Marina #7-2804 Halls Crossing Marina Lake Powell, Utah Sample Ethyl-Total TPH-TPH-TPH-Product Water Location benzene Xylenes GRO DRO DRO (w/SGT)DTW Thickness Elevation TOC Date (mg/L)(mg/L)(mg/L)(mg/L)(mg/L)(mg/L)(mg/L)(mg/L)(mg/L)(BTOC feet)(feet)(feet amsl) 0.005 1 0.70 10 0.70 0.20 1.00 1.00 1.00 ------ 0.3 3 4 10 0.70 0.20 10 10 10 ------ Naphthalene DERR ISL: Tier 1 SL: Toluene MTBEBenzene MRB-5 7/1/1993 ND ND ND ND NA NA ND NA NA 123.86 0.00 3,617.93 TOC:10/20/1993 ND ND ND ND NA NA ND NA NA 128.81 0.00 3,612.98 3,741.79 3/17/1994 ND ND ND ND NA NA ND NA NA NM NM NM 6/9/1994 ND ND ND ND NA NA ND NA NA 108.51 0.00 3,633.28 12/15/1994 ND ND ND ND NA NA ND NA NA 106.97 0.00 3,634.82 3/8/1995 ND ND ND ND NA NA ND NA NA 108.45 0.00 3,633.34 6/7/1995 ND ND ND ND NA NA ND NA NA 108.12 0.00 3,633.67 12/6/1995 ND ND ND ND NA NA ND NA NA 92.42 0.00 3,649.37 5/30/1996 ND ND ND ND NA NA ND NA NA 91.97 0.00 3,649.82 12/18/1996 ND ND ND ND NA NA ND NA NA 88.38 0.00 3,653.41 6/18/1997 ND ND ND ND ND ND ND NA NA 90.43 0.00 3,651.36 12/18/1997 ND ND 0.0022 0.0014 ND ND ND NA NA 81.48 0.00 3,660.31 6/17/1998 ND ND ND ND ND ND ND NA NA 81.97 0.00 3,659.82 12/22/1998 ND ND ND ND ND ND ND NA NA 78.98 0.00 3,662.81 6/21/1999 0.0021 ND ND ND ND ND ND NA NA 80.37 0.00 3,661.42 11/12/1999 <0.0005 <0.0005 <0.0005 <0.0005 NS <0.002 <0.050 NA NA 75.49 0.00 3,666.30 5/19/2000 <0.002 <0.002 <0.002 <0.006 <0.002 <0.002 <5.0 NA NA 80.93 0.00 3,660.86 11/9/2000 <0.002 <0.002 <0.002 <0.006 <0.002 <0.002 <5.0 NA NA 79.86 0.00 3,661.93 5/3/2001 <0.002 <0.002 <0.002 <0.006 <0.002 <0.002 <5.0 NA NA 86.81 0.00 3,654.98 9/18/2002 <0.0005 <0.0005 <0.0005 <0.0015 NA <0.0025 <0.050 NA NA 101.14 0.00 3,640.65 9/17/2003 <0.0005 <0.0005 <0.0005 <0.0005 <0.001 <0.0005 <0.050 NA NA 115.36 0.00 3,626.43 9/22/2004 <0.0005 <0.0005 <0.0005 <0.0005 <0.001 <0.0005 <0.050 0.33 NA 128.08 0.00 3,613.71 10/6/2005 DRY DRY DRY DRY DRY DRY DRY DRY DRY DRY 0.00 3,741.79 10/5/2006 DRY DRY DRY DRY DRY DRY DRY DRY DRY DRY (133.8')0.00 NC 10/18/2007 DRY DRY DRY DRY DRY DRY DRY DRY DRY DRY (131')0.00 NC 9/16/2008 DRY DRY DRY DRY DRY DRY DRY DRY NA DRY (131')0.00 NC 9/28/2009 <0.0005 <0.0005 <0.0005 <0.0005 <0.001 <0.0005 <0.050 0.0037 NA 125.65 0.00 3,616.14 9/26/2010 <0.0005 <0.0005 <0.0005 <0.0005 <0.001 <0.0005 <0.022 <0.050 NA 121.64 0.00 3,620.15 12/10/2011 <0.0005 <0.0005 <0.0005 <0.0005 <0.001 <0.0005 <0.022 <0.050 NA 113.56 0.00 3,628.23 12/10/2012 <0.0005 <0.0005 <0.0005 <0.0005 <0.001 <0.0005 <0.022 <0.050 NA 118.55 0.00 3,623.24 6/23/2014 DRY DRY DRY DRY DRY DRY DRY DRY DRY DRY (130')0.00 NC 9/28/2015 DRY DRY DRY DRY DRY DRY DRY DRY DRY DRY (132')0.00 NC 5/16/2019 DRY DRY DRY DRY DRY DRY DRY DRY DRY DRY (132.2')0.00 NC 12/10/2019 DRY DRY DRY DRY DRY DRY DRY DRY DRY DRY (131.2')0.00 NC 5/5/2020 DRY DRY DRY DRY DRY DRY DRY DRY DRY DRY (NA)0.00 NC 10/6/2020 DRY DRY DRY DRY DRY DRY DRY DRY DRY DRY (131.2)0.00 NC 3/23/2021 DRY DRY DRY DRY DRY DRY DRY DRY DRY DRY (131.2)0.00 NC 5/25/2021 DRY DRY DRY DRY DRY DRY DRY DRY DRY DRY (131.25)0.00 NC 8/3/2021 DRY DRY DRY DRY DRY DRY DRY DRY DRY DRY (131.25)0.00 NC 11/4/2021 DRY DRY DRY DRY DRY DRY DRY DRY DRY DRY (131.25)0.00 NC MRB-5 11/8/2023 DRY DRY DRY DRY DRY DRY DRY DRY DRY DRY (131.00)0.00 NC See Notes on Page 8. https://arcadiso365.sharepoint.com/teams/portfolio-817733/Shared Documents/72804 Halls Crossing/9 - Deliverables/2023/Tables/72804 4Q23 Table_V0 2/8 Table 1 Groundwater Gauging and Analytical Data Former Chevron Marina #7-2804 Halls Crossing Marina Lake Powell, Utah Sample Ethyl-Total TPH-TPH-TPH-Product Water Location benzene Xylenes GRO DRO DRO (w/SGT)DTW Thickness Elevation TOC Date (mg/L)(mg/L)(mg/L)(mg/L)(mg/L)(mg/L)(mg/L)(mg/L)(mg/L)(BTOC feet)(feet)(feet amsl) 0.005 1 0.70 10 0.70 0.20 1.00 1.00 1.00 ------ 0.3 3 4 10 0.70 0.20 10 10 10 ------ Naphthalene DERR ISL: Tier 1 SL: Toluene MTBEBenzene VRB-2 11/8/2023 NS NS NS NS NS NS NS NS NS 53.01 0.00 TOC: See Notes on Page 8. https://arcadiso365.sharepoint.com/teams/portfolio-817733/Shared Documents/72804 Halls Crossing/9 - Deliverables/2023/Tables/72804 4Q23 Table_V0 3/8 Table 1 Groundwater Gauging and Analytical Data Former Chevron Marina #7-2804 Halls Crossing Marina Lake Powell, Utah Sample Ethyl-Total TPH-TPH-TPH-Product Water Location benzene Xylenes GRO DRO DRO (w/SGT)DTW Thickness Elevation TOC Date (mg/L)(mg/L)(mg/L)(mg/L)(mg/L)(mg/L)(mg/L)(mg/L)(mg/L)(BTOC feet)(feet)(feet amsl) 0.005 1 0.70 10 0.70 0.20 1.00 1.00 1.00 ------ 0.3 3 4 10 0.70 0.20 10 10 10 ------ Naphthalene DERR ISL: Tier 1 SL: Toluene MTBEBenzene VRB-8 5/9/2006 8.6 20 1.3 12 0.5 <0.010 110 160 NS 38.11 0.00 3,687.24 TOC:10/18/2007 9.5 31 2.8 24 0.78 <0.025 220 310 NS 25.02 0.20 3,700.48 3,725.35 9/16/2008 3.0 12 1.4 19 1.7 0.011 110 390 NS 27.60 0.00 3,697.75 9/28/2009 0.53 3.0 0.48 9.5 0.51 <0.010 110 790 NS 27.42 0.00 3,697.93 9/26/2010 6.6 9.1 0.7 15 0.6 0.036 130 270 NS 28.14 0.00 3,697.21 12/10/2011 16 19 0.74 16 0.59 0.078 180 17 NS 27.71 0.00 3,697.64 12/10/2012 9.8 12 1.2 20 0.94 0.061 230 56 NS 28.02 0.00 3,697.33 6/23/2014 5.3 13 1.7 24 0.85 0.045 200 40 NS 32.98 0.00 3,692.37 9/28/2015 4.6 5.6 0.25 7.4 0.32 <0.025 88 19 NS 26.26 0.00 3,699.09 3/19/2019 20 24 1.4 17 0.53 0.055 170 160 NS 27.73 0.00 3,697.62 5/16/2019 14 16 1.3 12 0.55 0.056 160 51 NS 27.81 0.00 3,697.54 12/10/2019 16 17 1.1 11 0.40 J 0.055 J 170 3.3 NS 27.31 0.00 3,698.04 5/5/2020 NS NS NS NS NS NS NS NS NS 27.55 0.00 3,697.80 10/6/2020 DRY DRY DRY DRY DRY DRY DRY DRY NS 25.93 0.00 3,699.42 3/23/2021 9.84 1.17 1.57 13.6 0.361 0.0392 J 113 377 NS 25.81 0.00 3,699.54 5/26/2021 10 15 2.23 18 0.521 0.045 J 146 446 NS 46.31 0.00 3,679.04 8/3/2021 NS NS NS NS NS NS NS NS NS 27.72 0.00 3,697.63 11/4/2021 NS NS NS NS NS NS NS NS NS 27.16 0.00 3,698.19 11/9/2023 16.4 18.1 1.36 12.3 0.545 J 0.0546 J 158 262 132 25.98 0.00 3699.37 VRB-8 11/9/2023 (DUP)16.4 16.9 1.27 11.1 0.589 0.0542 159 286 140 25.98 0.00 3699.37 VRB-8A 6/23/2014 1.5 2.6 0.089 15 0.35 0.005 71 12 NS 28.11 0.00 3,697.84 TOC:9/28/2015 4.2 3.6 0.099 7.9 0.16 <0.025 65 8.2 NS 27.79 0.00 3,698.16 3,725.95 3/19/2019 6.2 13 1.1 15 0.42 0.023 170 140 NS 25.84 0.00 3,700.11 5/16/2019 4.7 8.7 0.81 11 0.44 0.018 130 39 NS 26.02 0.00 3,699.93 12/10/2019 6.4 10 0.77 12 0.370 J <0.020 140 4 NS 24.85 0.00 3,701.10 5/5/2020 NS NS NS NS NS NS NS NS NS 25.90 0.00 3,700.05 10/6/2020 NS NS NS NS NS NS NS NS NS 27.90 0.00 3,698.05 3/23/2021 NS NS NS NS NS NS NS NS NS 28.00 0.00 3,697.95 8/3/2021 NS NS NS NS NS NS NS NS NS 25.47 0.00 3,700.48 11/4/2021 NS NS NS NS NS NS NS NS NS 27.42 0.00 3,698.53 VRB-8A 11/8/2023 NS NS NS NS NS NS NS NS NS 26.72 0.00 3,699.23 See Notes on Page 8. https://arcadiso365.sharepoint.com/teams/portfolio-817733/Shared Documents/72804 Halls Crossing/9 - Deliverables/2023/Tables/72804 4Q23 Table_V0 4/8 Table 1 Groundwater Gauging and Analytical Data Former Chevron Marina #7-2804 Halls Crossing Marina Lake Powell, Utah Sample Ethyl-Total TPH-TPH-TPH-Product Water Location benzene Xylenes GRO DRO DRO (w/SGT)DTW Thickness Elevation TOC Date (mg/L)(mg/L)(mg/L)(mg/L)(mg/L)(mg/L)(mg/L)(mg/L)(mg/L)(BTOC feet)(feet)(feet amsl) 0.005 1 0.70 10 0.70 0.20 1.00 1.00 1.00 ------ 0.3 3 4 10 0.70 0.20 10 10 10 ------ Naphthalene DERR ISL: Tier 1 SL: Toluene MTBEBenzene VRB-9 5/9/2006 13 27 2.1 15 0.41 <0.025 130 36 NS 28.33 0.00 3,698.52 TOC:10/18/2007 7.6 24 2.0 17 0.48 <0.013 120 54 NS 29.35 0.00 3,697.50 3,726.85 9/16/2008 5.7 16 1.3 17 0.41 <0.010 91 29 NS 29.89 0.00 3,696.96 9/28/2009 6.6 20 1.6 19 0.53 <0.010 120 31 NS 29.71 0.00 3,697.14 9/26/2010 4.9 16 1.4 19 0.49 <0.0005 120 28 NS 28.50 0.00 3,698.35 12/10/2011 3.7 15 1.3 18 0.55 <0.010 88 4.5 NS 29.57 0.00 3,697.28 12/10/2012 3.0 9.3 0.89 14 0.46 <0.010 83 13 NS 30.06 0.00 3,696.79 6/23/2014 4.1 13 1.6 17 0.53 <0.010 97 31 NS 30.08 0.00 3,696.77 9/28/2015 4.00 8.7 0.85 11 0.23 <0.050 72 2.4 NS 29.21 0.00 3,697.64 3/19/2019 2.50 8.5 0.78 13 0.34 <0.004 55 18 NS 31.08 0.00 3,695.77 5/16/2019 NS NS NS NS NS NS NS NS NS NM NM NM 12/10/2019 NS NS NS NS NS NS NS NS NS NM NM NM 5/5/2020 NS NS NS NS NS NS NS NS NS 37.35 0.00 3,689.50 10/6/2020 NS NS NS NS NS NS NS NS NS 49.95 0.00 3,676.90 3/23/2021 NS NS NS NS NS NS NS NS NS 52.26 0.00 3,674.59 8/3/2021 NS NS NS NS NS NS NS NS NS 55.03 0.00 3,671.82 11/4/2021 NS NS NS NS NS NS NS NS NS 54.12 0.00 3,672.73 VRB-9 11/9/2023 2.06 2.84 0.312 10.4 0.317 0.00243 J 64.3 99.6 66.1 50.34 0.00 3,676.51 VRB-9A 11/8/2023 NS NS NS NS NS NS NS NS NS DRY (24.38)0.00 TOC: See Notes on Page 8. https://arcadiso365.sharepoint.com/teams/portfolio-817733/Shared Documents/72804 Halls Crossing/9 - Deliverables/2023/Tables/72804 4Q23 Table_V0 5/8 Table 1 Groundwater Gauging and Analytical Data Former Chevron Marina #7-2804 Halls Crossing Marina Lake Powell, Utah Sample Ethyl-Total TPH-TPH-TPH-Product Water Location benzene Xylenes GRO DRO DRO (w/SGT)DTW Thickness Elevation TOC Date (mg/L)(mg/L)(mg/L)(mg/L)(mg/L)(mg/L)(mg/L)(mg/L)(mg/L)(BTOC feet)(feet)(feet amsl) 0.005 1 0.70 10 0.70 0.20 1.00 1.00 1.00 ------ 0.3 3 4 10 0.70 0.20 10 10 10 ------ Naphthalene DERR ISL: Tier 1 SL: Toluene MTBEBenzene VRB-11 5/9/2006 13 25 1.9 15 0.54 <0.013 210 310 NS 35.16 0.26 3,693.11 TOC:10/18/2007 14 30 2.7 20 0.73 <0.025 210 400 NS 31.07 0.37 3,697.28 3,728.07 9/16/2008 7.3 20 2.1 18 0.53 <0.013 120 400 NS 41.11 0.00 3,686.96 9/28/2009 3.4 15 1.9 16 0.56 <0.010 130 410 NS 35.43 0.00 3,692.64 9/26/2010 NS NS NS NS NS NS NS NS NS 39.47 0.14 3,688.71 12/10/2011 6.5 16 1.7 18 0.72 0.018 180 290 NS 33.15 0.00 3,694.92 12/10/2012 4.0 15 1.4 17 0.5 0.013 180 15 NS 33.80 0.00 3,694.27 6/23/2014 NS NS NS NS NS NS NS NS NS 40.00 0.12 3,688.16 9/28/2015 NS NS NS NS NS NS NS NS NS 32.51 0.15 3,695.67 3/19/2019 1.2 5.6 1.1 19 0.73 <0.002 180 260 NS 33.22 0.00 3,694.85 5/16/2019 1.6 6.6 1.0 12 0.63 <0.001 120 130 NS 34.46 0.00 3,693.61 12/10/2019 1.9 7.7 0.9 14 0.45 <0.010 140 2.9 NS 33.22 0.00 3,694.85 5/5/2020 NS NS NS NS NS NS NS NS NS 35.48 0.00 3,692.59 10/6/2020 DRY DRY DRY DRY DRY DRY DRY DRY NS 35.15 0.00 3,692.92 3/23/2021 2.55 12.1 V 1.43 17.5 V 0.408 J J3 J5 <0.0101 J3 139 467 NS 30.82 0.00 3,697.25 5/26/2021 2.97 10.8 1.52 16.1 0.460 J <0.0101 116 494 NS 32.95 0.00 3,695.12 8/3/2021 NS NS NS NS NS NS NS NS NS 37.87 0.00 3,690.20 11/4/2021 NS NS NS NS NS NS NS NS NS 34.11 0.00 3,693.96 VRB-11 11/9/2023 2.90 6.81 0.716 18.1 0.655 0.0117 J 136 298 213 32.18 0.00 3,695.89 VRB-11A 11/8/2023 NS NS NS NS NS NS NS NS NS 29.01 0.00 TOC: See Notes on Page 8. https://arcadiso365.sharepoint.com/teams/portfolio-817733/Shared Documents/72804 Halls Crossing/9 - Deliverables/2023/Tables/72804 4Q23 Table_V0 6/8 Table 1 Groundwater Gauging and Analytical Data Former Chevron Marina #7-2804 Halls Crossing Marina Lake Powell, Utah Sample Ethyl-Total TPH-TPH-TPH-Product Water Location benzene Xylenes GRO DRO DRO (w/SGT)DTW Thickness Elevation TOC Date (mg/L)(mg/L)(mg/L)(mg/L)(mg/L)(mg/L)(mg/L)(mg/L)(mg/L)(BTOC feet)(feet)(feet amsl) 0.005 1 0.70 10 0.70 0.20 1.00 1.00 1.00 ------ 0.3 3 4 10 0.70 0.20 10 10 10 ------ Naphthalene DERR ISL: Tier 1 SL: Toluene MTBEBenzene VRB-12 5/9/2006 0.59 0.16 0.22 2.1 0.38 0.001 17 32 NS 31.21 0.00 3,687.90 TOC:10/18/2007 0.032 0.005 0.012 0.25 0.065 <0.0005 3.1 13 NS 27.99 0.00 3,691.12 3,719.11 9/16/2008 0.097 0.004 0.006 0.052 0.025 <0.0005 2.5 NS NS 30.05 0.00 3,689.06 9/28/2009 0.084 0.003 0.007 0.01 0.002 <0.0005 3.1 7.0 NS 34.22 0.00 3,684.89 9/26/2010 <0.005 <0.005 <0.005 <0.005 <0.01 <0.005 0.99 2.9 NS 35.60 0.00 3,683.51 12/10/2011 DRY DRY DRY DRY DRY DRY DRY DRY NS DRY (43.1')0.00 NC 12/10/2012 DRY DRY DRY DRY DRY DRY DRY DRY NS DRY (43.1')0.00 NC 6/23/2014 0.004 <0.0005 <0.0005 <0.0005 <0.0001 <0.0005 <0.022 <0.050 NS 28.91 0.00 3,690.20 9/28/2015 0.002 <0.0005 <0.0005 0.0005 0.002 <0.0005 0.044 <0.046 NS 29.14 0.00 3,689.97 5/16/2019 NS NS NS NS NS NS NS NS NS NM 0.00 NM 12/10/2019 NS NS NS NS NS NS NS NS NS NM 0.00 NM 5/5/2020 NS NS NS NS NS NS NS NS NS 29.95 0.00 3,689.16 10/6/2020 NS NS NS NS NS NS NS NS NS 43.11 0.00 3,676.00 3/23/2021 NS NS NS NS NS NS NS NS NS DRY (43.12)0.00 NC 5/26/2021 NS NS NS NS NS NS NS NS NS DRY (43.12)0.00 NC 8/3/2021 NS NS NS NS NS NS NS NS NS DRY (43.12)0.00 NC 11/4/2021 DRY DRY DRY DRY DRY DRY DRY DRY NS DRY (43.12)0.00 NC VRB-12 11/8/2023 NS NS NS NS NS NS NS NS NS 19.56 0.00 3,699.55 VRB-12A 11/8/2023 NS NS NS NS NS NS NS NS NS 20.95 0.00 TOC: See Notes on Page 8. https://arcadiso365.sharepoint.com/teams/portfolio-817733/Shared Documents/72804 Halls Crossing/9 - Deliverables/2023/Tables/72804 4Q23 Table_V0 7/8 Table 1 Groundwater Gauging and Analytical Data Former Chevron Marina #7-2804 Halls Crossing Marina Lake Powell, Utah Sample TOC Notes: Bold indicates concentrations exceeding DERR ISL Shading indicates concentrations exceeding the Tier 1 SL BTEX, Naphthalene, and MTBE analyzed by EPA method 8260B from June 2003 to present. TPH-DRO analyzed by EPA method 8015B Modified. TPH-GRO analyzed by EPA method 8015B Modified. Values in bold exceed the ISLs or DERR policy levels. Lake Powell's elevation was obtained from the U.S. Bureau of Reclamation website. MRB-4 and MRB-5 were dry (since 9/28/2015). All sample results may be biased high due to no purge sampling. No purge sampling completed due to communication limitations at the site during the sampling event. Not representative of full three well volume purge because VRB-8 and VRB-11 went dry. W ells were purged day before sampling to allow sufficient time for recharge; 0.98 well volumes purged from VRB-8 and 1.01 well volumes purged from VRB-11 on 11/08/2023. VRB-9 was grab-sampled on 11/09/23. TPH-DRO AND TPH-GRO analyzed by EPA method 8015D in November 2023 Acronyms and Abbreviations: µg/L = micrograms per liter NC = not calculated amsl = above mean sea level ND = Not detected at concentrations at or above the method detection limit. The method detection BTEX = benzene, toluene, ethylbenzene, and total xylenes limit is listed in the analytical report. BTOC = below top of casing NS = not sampled for the specific parameter DTW = depth to water SGT = silica gel treatment EPA = United States Environmental Protection Agency SL = screening level ISL = Division of Environmental Response and Remediation (DERR) Initial Screening Level TOC = top of casing elevation in feet above mean sea level MTBE = methyl tert-butyl ether TPH-DRO = total petroleum hydrocarbons - diesel range organics NM = not measured TPH-GRO = total petroleum hydrocarbons - gasoline range organics NA = not analyzed J = The identification of the analyte is acceptable; the reported value is an estimate https://arcadiso365.sharepoint.com/teams/portfolio-817733/Shared Documents/72804 Halls Crossing/9 - Deliverables/2023/Tables/72804 4Q23 Table_V0 8/8 Figures APPROXIMATE SCALE : 1 in. = 2,000 ft. 0 2,000'4,000' SITE LOCATION SITE LOCATION MAP 1 FIGURE CI T Y : E M E R Y V I L L E , C A D I V / G R O U P : E N V C A D D B : A . R E Y E S C: \ U s e r s \ b s m i t h \ A C C D o c s \ A r c a d i s \ A U S - C H E V R O N - 7 2 8 0 4 - L A K E P O W E L L U t a h \ P r o j e c t F i l e s \ 2 0 2 2 \ 0 1 - I n P r o g r e s s \ 0 1 - D W G \ S L M . d w g L A Y O U T : 1 S A V E D : 7/ 2 8 / 2 0 2 2 2 : 1 3 P M A C A D V E R : 23 . 1 S ( L M S T E C H ) P A G E S E T U P : -- - - P L O T S T Y L E T A B L E : AR C A D I S . C T B P L O T T E D : 7/ 2 8 / 2 0 2 2 2 : 2 1 P M B Y : SM I T H , B O B SOURCE: BASE MAP USGS 7.5. MIN. TOPO. QUAD., HALLS CROSSING, UTAH, 2020. N FORMER CHEVRON MARINA #7-2804 HALLS CROSSING MARINA LAKE POWELL, UTAH UTAH AREA LOCATION ELECTRICAL TRANSFORMER 3/4"Ø CONDUIT (12" DEEP) SEWER LIFT STATION INFERRED EDGE OF OLD TANK BASIN HALLS C R O S S I N G R O A D T O F E R R Y L A N D I N G EQUIPMENT ENCLOSURE 4"Ø PVC MAIN LAKE POWELL VM-1 MRB-5 V VRB-12 VVRB-12A MRB-4 V VRB-11A VRB-2 VW-3 VW-2 V VRB-8 V VRB-8A VVRB-9A V VRB-9 V VRB-11 CITY: BANGALORE, INDIA DIV/GROUP: ENV/IM-DV DB: PAVAN KUMAR A PM: TM: LYR:ON=*;OFF=REF, (FRZ) C:\Users\bsmith\OneDrive - ARCADIS\BIM360 - OneDrive Sync Location\AUS-CHEVRON-72804-LAKE POWELL-Utah\2022\01-In Progress\01-DWG\Fig 2 _ Site Map.dwg LAYOUT: 3 SAVED: 4/25/2022 8:27 AM ACADVER: 23.1S (LMS TECH) PAGESETUP: ---- PLOTSTYLETABLE: PLTFULL.CTB PLOTTED: 4/25/2022 9:07 AM BY: SMITH, BOB SITE MAP SUROUNDING AREA FIGURE 2 0 APPROXIMATE SCALE 1 in. = 125 125 250 FORMER CHEVRON MARINA #7-2804 HALLS CROSSING MARINA LAKE POWELL, UTAH V MONITORING WELL VENT WELL LEGEND: ABANDONED MONITORING WELL N DIRT ROAD ELECTRICAL TRANSFORMER SEWER LIFT STATION INFERRED EDGE OF OLD TANK BASIN HALLS C R O S S I N G R O A D T O F E R R Y L A N D I N G AS P H A L T A C C E S S R O A D EQUIPMENT ENCLOSURE 4"Ø PVC MAIN VM-1 MRB-5 V VRB-12 VVRB-12A MRB-4 V VRB-11A VRB-2 VW-3 VW-2 V VRB-8 V VRB-8A VVRB-9A V VRB-9 V VRB-11 VVRB-6 VVRB-7 AREA 3 AREA 5 AREA 2 AREA 1 AREA 4 AREA 6 VRB-3 VRB-1 PIPING LEFT IN PLACE EXCAVATED PIPING 3/4"Ø CONDUIT (12" DEEP) 3 FIGURE CITY: BANGALORE, INDIA DIV/GROUP: ENV/IM-DV DB: PAVAN KUMAR A PM: TM: LYR:ON=*;OFF=REF, (FRZ) C:\0-CAD SITE-PDFS\CHEVRON\72804\2024\72804-Site Map.dwg LAYOUT: WELL-LOC SAVED: 2/2/2024 7:12 AM ACADVER: 24.2S (LMS TECH) PAGESETUP: ---- PLOTSTYLETABLE: PLTFULL.CTB PLOTTED: 2/2/2024 7:14 AM BY: SMITH, ROBERT WELL LOCATION MAP 0 APPROXIMATE SCALE 1 in. = 60 ft. 60'120' N FORMER CHEVRON MARINA #7-2804 HALLS CROSSING MARINA LAKE POWELL, UTAH V MONITORING WELL VENT WELL LEGEND: ABANDONED MONITORING WELL EXCAVATION SAMPLE 3,540 3,550 3,560 3,570 3,580 3,590 3,600 3,610 3,620 3,630 3,640 3,650 3,660 3,670 3,680 3,690 3,700 3,710 Elevation (ft amsl) Date Figure 4 FORMER CHEVRON MARINA #7-2804, HALLS CROSSING MARINA - LAKE POWELL, UTAH Lake Powell and Monitoring Well Hydrographs (1993-2023) Lake Powell Elevation MRB-4 DTB elevation MRB-5 DTB elevation MRB-4 (elevation) MRB-5 (elevation) ft amsl = feet above mean sea level DTB = depth to bottom Appendix A October 5, 2023 No Further Action Review Letter 195 North 1950 West • Salt Lake City, UT Mailing Address: P.O. Box 144840 • Salt Lake City, UT 84114-4840 Telephone (801) 536-4100 • Fax (801) 359-8853 • T.D.D. (801) 536-4284 www.deq.utah.gov Printed on 100% recycled paper State of Utah SPENCER J. COX Governor DEIDRE HENDERSON Lieutenant Governor Department of Environmental Quality Kimberly D. Shelley Executive Director DIVISION OF ENVIRONMENTAL RESPONSE AND REMEDIATION Brent H. Everett Director ERRA-16-23 October 5, 2023 SENT VIA U.S. REGULAR AND CERTIFIED MAIL RETURN RECEIPT REQUESTED John Amoto, Project Manager Chevron Environmental Management Company 6001 Bollinger Canyon Road, C2092 San Ramon, California 94583 Re: No Further Action Review Old Hall’s Crossing Marina, Chevron #73032 Located at Glen Canyon National Recreation Area, Hall’s Crossing, Utah Facility Identification No. 5000374, Release Site GVN Dear Mr. Amoto: The Division of Environmental Response and Remediation (DERR) completed its review of site conditions and the request for No Further Action (NFA) status at the above-referenced facility, on July 18, 2023. The review indicates that in-place soil and groundwater contamination remain and exceeds the DERR’s Initial Screening Level (ISL) cleanup standard. Conclusions drawn from the DERR review are: 1. Soil contamination above the ISL remains for benzene, toluene, ethylbenzene, xylene, total petroleum hydrocarbons, diesel range organics (TPH-DRO) and total petroleum hydrocarbons, gasoline range organics (TPH-GRO). This contamination is primarily found at the former underground storage tank (UST) basin, in and about shallow sampling location Area#4, and UST closure samples SW Tank Basin, NE Pre-mix Tank, SE Tank Basin and NW Tank Basin. The petroleum contamination is inferred to penetrate greater than 30’ below grade (bg) and into bedrock, as evidenced by the historic presence of non-aqueous phase liquid (NAPL) in vent wells (VWs) VRB-8, VRB-8A, VRB-9, VRB-11 and VRB-12 (see enclosed map from UST closure, Soil Chemistry-Delta, 1992, Figure 8 and Soil and Bedrock Chemistry-Delta, 1992, Figure 10). 2. Dissolved-phase petroleum-impacted groundwater, above the ISL remains in VWs VRB-8 and VRB-11. The ISLs exceeded are for benzene, toluene, ethylbenzene, xylene, TPH-DRO and TPH-GRO, specifically. The VWs appear to be in a perched aquifer from about 32’ to 46‘bg, and have been historically impacted with NAPL. Facility ID# 5000374 Page 2 The depth to groundwater, i.e., the level of Lake Powell, is currently about 3,575’ above mean sea level, and about 35’ below the deepest groundwater monitoring well (MW) MRB-5 (see enclosed Former UST Basin and Soil Sampling Locations map-Arcadis, 2022, Figure 3 for VW and MW locations). 3. The area impacted with soil and groundwater contamination, is on third party land, the Glen Canyon National Recreation Area (GCNRA), owned by the Federal Government. Therefore, the following must be completed before NFA can be considered: 1. Evaluate VRB-8 and VRB-11 and collect field data for depth to water and or measurable NAPL. If conditions allow, obtain samples of groundwater from the VWs and have them analyzed for diesel and gasoline range constituents, TPH-DRO, TPH-GRO, benzene, toluene, ethyl-benzene, xylene and naphthalene (BTEXN). Provide a report of findings to the DERR; and 2. Due to the high level of petroleum contamination proposed to be left in place, Chevron Environmental Management Company (CEMC) will need to approach the owner of the GCNRA, about voluntarily entering into an Environmental Covenant (EC) with the DERR, in compliance with the Utah Uniform Environmental Covenants Act, Utah Code Section 57-25-101, et seq. The EC must then be recorded with the San Juan County Recorder’s Office. The EC will identify the remaining contamination and contain “activity and use limitation” provisions to protect the owner, workers, and the public from exposure to the remaining petroleum contamination. The DERR may assist in the effort of drafting an acceptable EC and guiding the parties through the process. If the EC is rejected, the director may require CEMC complete additional corrective action. According to Utah Code R311-202 and R311-211, the DERR requires that CEMC provide a groundwater assessment report within 120 days of receipt of this letter. If you have any questions concerning this letter, please contact Mark Crim, the DERR project manager, at (801) 536-4100. Sincerely, Brent H. Everett, Director Division of Environmental Response and Remediation BHE/MEC/ss cc: Grant Sunada, PhD, Executive Director, San Juan Public Health Department Paul Wright, District Engineer, Utah Department of Environmental Quality Kimberlee McEwan, Utah Attorney General’s Office Michelle Kerns, Superintendent, Glen Canyon National Recreation Area Taura Nichols, P.E., CC-0247, Arcadis U.S., Inc. Patrick Juancorena, U.S. Environmental Protection Agency, Region 8 Appendix B Groundwater Sampling and Gauging Logs Field Forms Document Control Number:TGM - TGM +number date as follows:xxxxxxxx.xxxx.xxxxx - is form documents the tailgate meeting conducted in accordance with the Project HASP. Personnel who perform work operations during the day are required to attend this meeting and to acknowledge their attendance, at least daily. - check actívlties to be condueted that require permlt f\teu Iltr iissuance orcompletion of a chøcklist orslmilarbefora work beglns: l-lruot applicable Doc # nworring at Height len"rgy lsolation (LOTO) !Excavation/Trenching lMechanicalLifting Ops [OverneaO & Buried Utilities €ARCADISIffi*- Doc # lnotworr lotneroermit Doc # the hazards (check all those that are dlscussed) (Examples are provlded) and A,saess the Risks (!ow, Medium, High - circle level) - Provide an overall assessment of haærde to be encountered today and bdefly list them under the hazard category. ! eravity (i.e., tadder, scarrotd(íi'liìÐ r lr,^ln .r Qn [e .rni f\ tl @¡U flnllotion (i.e.,traff¡c, movingwater) (L M H) Electrical (i.e., utilitios, lightning)(L M H) lPr"rrur" (i.e. gas cyllnders, wells)(LMH)Environment (i.e., heat,€ıià)Fe)@" r, l-lCnemical (i.e., ruel, acid, paint) (L M H) Mffi:i:(i.€., ticks, poison lW) (L MQ Radiation (i.e., alnha,@ bser) (L M 0 '@ tr$¡rr K Personal (i.e. alone, night, not fit) (L M Driving 0.".@,boat,dozer) (L M 0Sound (¡.e., machinery, (i.€., augers, motors) Rev. 07 05_February_2016 ARC HSGEOOI 'Cto rÐn t94c lnitial Site Walk Comments:t TRAGKing the Tailgate Meeting l',trut U s[aL. W¿ [ts tottnrt sron pl* if SuJv re.- 1 2 5 t¡9 through the Tasks (list the tasks for the day): 3 4 party acÍvities that may pose hazards to Arcadts operations lf yes, describe them here: How will they be controlled? are any other Arcadie, Client or otherOther llazardoua Actlvltlss - Check the lf there are none, write "None" here: DlgCugS followlng questlons úor rom¡ ¡ovl¡w prw¡our dif. port rct¡vltlorh Check lf yeS :lfoOics from Corp H&S to cover? flont Stop Work lnterventions yesterday? !tf ceviations, notiff PM & client lnU equipment checked & OK? Ilncidents from day before to review? nont corrective actions from yesterday? !lsn" or procedures are available? flStar nas appropriate PPE? Comments: !t"sonr learned from the day before? Iwiff any work deviate from plan? !fi"fd teams to "dirt/ JSAs, as needed? Staff knows Emergency Plan (EAP)?Staff knows gathering points? V Tailgate pg.1 and 2 ot 2 e A Real Commitment, A Daily lssue: Safety TAILGATE HEALTH & SAFETY MEETING FORM .2 and V¡s ln¡t¡al & Slgn in Time ln¡tial & S¡gn out Time I nave r€ao and rrñalâRlâñr{ k7< 'zÅ { lmportant lnformation and Numbers All site staff should arr¡ve fit for work. lf not, they should report to the supervisor any restrictions or concerns. ln the event of an ¡njury, employees will call WorkCare at 1 .800.455.6155 and then notify the field supervisor who will then notify the Project or Task Manager. ln the event of a motor veh¡cle accident, employees will notiry the field supervisor who will then notify the Project or Task Manager. ln the event of a utility strike or other damage to property of a client or 3rd parly, employees will immediately notify the field supervisor, who will then immediately notify the Project or Task Manager. - not in work ln Out ln Out ln Out ln Out Kee in all thingsH&S 1 the hazards (Check alland discuss those methods to cont¡olthe hazards thatwill be implemented forthe day): Reviewthe STOP WORK AUTHORITY (Must be addressed in every Tailgate meeting - (See sfafements betow) Elimination Engineering controls General PPE Usage Personal Hygiene Emergency Action Plan (EAP) JSA to be developed/used lspecifu) re Rev. 07 05_February_2016 ARC HSGEOOl Substitution Admin istrative controls Ì'l Si Hearing Conservation Exposure Guidelines Fall Protection TIP conducted ßpecifv ioblJSA) lsolation Monitoring Respiratory Protection Decon Procedures Work Zones/Site Control Control Other the job any timê anyone or uncertain about health & saf€ty or if anyone identifieq a hazard or additional mitigation not recorded in th( site, project, ¡ob or task hazard assessment. lwill be alert to any changes in personnel, conditions at the work site or hazards not covered by the original hazard assessments. lf it is necessary to STOP THE JOB, I will perform TRAGK; and then amend the hazard assessments or the HASP as needed. ¡ will not assist a subcontractor or other party with their work unless it is absolutely necêssary and then only after I have done TRACK and I have thoroughly WorkCare - 1.888.449.77 87 controlled the - Review at end of day or before next day's work (Check those applicable and expla¡n:) þ a"rron, learned and best practices learned today: ! lncidents that occurred today: n OnU Stop Work interventions today? ! Corrective/Preventive Actions needed for future work: E Ont other H&S issues: Tailgate pgJ and 2 of 2 A Real Commitment, A Daily lssue: Safety GOAL o"r"' 1{/01 þ-Vn Beginnins Mirease:3î , 61g un¡eRryrþl - Iry+"_S Utot^ + T¿+q SDH operator:F-linc.ìs.o ß** ^ fiARCADISIff:¿ffi,***'* Ending Mitease: 3q SS? Get Out And look Smith System@ Five Keys (Fonrard Driving) 1. A¡m High in Sfeenhg @ - Avoid Collisions by seeing, evaluating, and act¡ng upon all ¡nformat¡on available. 2. Get the Big Picture @ - Fewer mistakes are made when you have the complete traffic picturc. 3. Keep Your Eyes Moving @ - Proper scanning techn¡ques separafe safe drivers from people who make costly enors. 4. Leave Yoursetf an Out @ - Ail that.separates drivers from a collision is space. Use it to your advantage. This also applies to parking-to ensure safe and easy exit in case of emergency, choose pull through spaces or back ¡nto parktng spaces when possible. 5. Make Sure They See You @ - Seek eye contact and use your warning dev¡ces at the same t¡me Smith System@ Five Keys (Backlng-Up Driving) : 1. Check The Back¡ng Area F¡rst 2. Back Slowly And Carcfully- Use A Spotter lf Necessary 3. Remain Aware Of The Bl¡nd Areas 4. LookFront, Sides, AndRearAsYou Back 5. Back No FurtherThan You Must PRE.TRIP VEHICLE INSPECTION CHECKLIST Back-u Alarm nal if instal ure cracki Taill hts NR = Needs tr Tread guide: lf a tread gauge is not available.coins may be used to determine remaining trea d. 2132" is the minimum by law in most states (top of Lincoln's head on penny), 4/32" is min¡mum recommended for wet surfaces (top of Washington's head on quarter), 6/32" is minimum recommended for snowy surfaces (top of Lincoln Memorial onpenny). Ourvehicletiresmustbereplacedifthetreaddepthislessthan 6/32" OK NR COMMENTSCHECK BEFORE OPERATING Driver's License on Hand ARCADIS lnsurance Card in Vehicle RTTA Turn Siqnals Operational Brake Liohts Ooerational Back-Up Lishts Operational Headliqhts Ooerational Parkinq Lights Operational Mirrors Adiusted to Minimize Blind Spots Under the Vehicle (nothing hanging or leaking) Windshield Wipers .anrLEluid all Functional Carqo Secured orÚn Trunk) Doors are Fullv Closed and Locked Seat Adiusted, Head Restraint to Match Height of Head Driver and All Passenqers Must Fasten Safety Belt Scan the Gauges to Make Sure Everything is Normal Adiust the Vents. Windows, and Heater or Air Conditioner for Comfort Review Driving JSA Driver is Mentally and Physically Prepared to Drive DOT Materials of Trade are Properly Stowed (ie. Compressed gas) i,ßl,rh I-b. ir¿ & ,Lt o rPerform a Driving-Related Safety Moment (record in comments) {rì. ' 2lS2" remalning 4/32" remaining 6/32" remalning H$þËulã-*ågå*'Ëå la Ë e ;Ë c s * *ä ËË ËËääää'ãsg c,g) CL -a'c cr) ogI U,o)n-{xr CN m o 0) lo-o ocfo-ãq)o oa o =. f(o -I l o U'o:t f q_ U 9)o 9oI 3o -!l6 û) n o: v88 (¡ ) ø) @= ' H6 c 0):t ão ß)5o ı o og Jo.É!¡o o A'g e. J(o Ðt!IN) €g Ðt!I(o Ð(!@ Ð @ æ Ð(I o) Ð CD (t l Ðt!I5 ã l\ ) ã J Ð(D I fu Ð(F J l\ ) Ðw ¡J J Ð u¡ I J a æ ¡o F(¡ ) Þ f\ ) fu fu -fofoU' oq¡ ¿=<És o Þ è Þ À s Þ À À 5 5 5 5 jødq -! O ı. E t\ )@(¡@ (0 ru(0 N(o (¡ (o * J(o Þ(o Jo (¡ )o Þ(r l I\Ul (¡ )o I(' l (t l o(o U) I J J @ luæ lu(' l s(¡ O I(¡ )o (¡ )o I(t t (' l Þ ¡J(o (0 ru(0 I @ o (t ì UJ o o oo o =eÐ= oJ o I DI f\ )?+) \J t\ ) {c\ >a 4 ^r u -¡ o \) -è , Þê v v z t) (\ ) { 7ñ 7_ {) ¿ru o o C) PF oî t fL É, 9d T] t> e -1 < , t, \J 7-Þ \, p Jk) NJ !r i¡3 -sI C;Õ -È J 'r )ñ û g. ct o C) FS Ê= -o = J] sJ .np q 5 H -\ .c f -. \ ñ\Þ) -cJ )-s lú +- / .r -1 1 -L¡. ) -l F J -t r ¡. 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S .z t_ ó oa 7q-Frl+t 2 o6-4¿- i' ú Y VRß-1¿ft To.tçp* --- 2ô5 ,l*nts '10rft -J. -./ --'1 / ELECTRìCAL TRANSFORMER I loluonê Ethvl.benzeno Toluanê Ethvl-benz€n€ lolãl Xvlenes VÊß-IZ ¿I MRB.4 Nt($T{itta 0.1Pçrn tù01 -d-?5,2[' --x {--.-|AKEPOWELL I I I I I I I I I I I I I I __-iù?ff*--x < Vt^f n ,?r.f, 2*L ll.l)u**''.B.ATRAMP 1ì ù 4r {\ñå'-- _ --/ 12.rrr DRv q"ot1\ llßy 12 \2\ 10'.1L W't¡lo-w r.r,n (0.j r:1,-¿ 6"q+' PßY - _.(_ \ / SEWER LIFT STATION CONDUIl 1rDEEP) I I-fl I I-,I ASPHALT PARKING AREA VKßEfl - ^^ ,¿ #'>nf =pRnJ,-- 2,+.38. tQ':2o 4'ø PVC I I I I I ¿/(1 ROCK OUTCROP ,.P\ô ÕÉ Uoo ts 3f --\ l- I I,> I I,> I I l,- tL I tÞ I / OUTCROP /DIRT RISE DEPRESSION ffiI-\l n1 Þc\0.2m", --*53,b1\ NorEs: ¡l¿ $g;. Olt1. BoLD = VALUES EXCEED THE RISK-BASED CORRECTIVE ACTION TIER 1 SCREENING LEVELS 2- E HIGHLIGHTEDVALUES EXCEEDTÉ RBCA TIER I SLS \,,,J VKþq 1o:14 1o'ifp* - - - SÙ.}t' ..1, - 5ï.i' LANOING ,b1. o.o pB,,n 3. NS = NOT SAMPLED 4. < = NOT DETECTEOATORABOVETHE METHOD DETECTION LIMIT (MDL) 5. ALLRESULTS ARE IN MTCROGRAMS PER LITER (pg/L) FORMER CHEVRON MARINA f7.2804 HALLS CROSSING MARINA LAKE POWELL, UTAH GROUNDWATER ANALYTICAL MAP December 10,2019 ÊARCAD'5¡6H* | 'ä' S uoruronrrucweLr APPROXIMATE SCALE I in. = 60 ft. LEGENOI + l____JL-_--A'," €) VENTWELL AEANDONED MONITORING WELL q ':o' nirt oo 21.1 'ì\< ,J-40,- .\ô\' I +q 5u\'? 5b,t3 gcfi \\,ot o\(* 32.1c¡' 5L RealTime Exposure Monitoring Data Collection Form Document all air monitoring conducted on the Site below. Keep this form with the project file. Site Name: lnstrument:ßAe Date: Serial#:Model: Activity Being Monitored Compounds/Hazards Monitored Time Reading Action Required? Y/N Arrù'n I Yo('ú+D )"0 /-J É-ln,t^û'^0,4o+z 0,7 /\l fl*''Í"J\lRß-ï Iiz.ç O,L fr) P,^äild Vf?ß- 14 *fsgl 0"6 N -/ n/À. \ \,/ v'I \4 \- Describe Any Actions Taken as a Result of this Air Monitoring and Why (does it match Table 5'1): Calibration Method (Material used settings, etc.)fuR f:rlr*tytru*, À r*\^ô^a/ Cark¡oo. fr \+.t Calibration Results:ParxJ Calibrated By:?c rctTerl -TEtîIFRA;I.EEH Ënvår*srmenta* Ëq uipmE¡-¡t & SNpplleE 54S S 48" Sr #1 04 Tempe, AZ A5241 480-303-0076 terratech@msn.com t t/6/29 CAL IBRATION CERTIFICATE Customer: Ancadis Uniü Ternatech Rental YSI Pnofessional Plus Serial #1OD\0157 4 Calibration: . pH 7 Buffer . pH 4 Buffen o 1413 us Conductivity Solution o 24OmV ORP Solution o Dissolved Oxygen % Satunation in Calibration Chamber CALIBRATION COMPLETE - Unit passed on all parameters acconding to the manufacturen's specifications Dean D. Ferrin Equipment Technician v TEFRRATEEH Ë¡"rvãs'onmsntmT Ëq ¡.:!prnent Ëv 5L¡pplics 549 S 48" Sr #1 04 Tempe, AZ A5241 480-303-0076 terratech@msn.com 1 t 16123 CAL IBRATION CERTIFICATE Customer: Ancadis Unit:Ternatech Rental LaMotte 2O2O Serial #3662-3802 Calibration: o 1 NTU fSpan] CALIBRATION COMPLETE - Unit passed on all parameters according to the manufactuner's specifications Service: N/A Dean D. Ferrin Equipment Technician This form documents the tailgate meeting conducted in accordance with the Project HASP. Personnel who perform work operations HEALTH during the day are required to attend this meeting and to acknowledge their attendance, at least daily TTJIEETING on:Project Name: Conducted by: Client Contact:ient: al Site Wal ng the Tailgate Meeting h the Tasks (list theink 5 b2 for the day) 3 4 Other Hazardous Activities - Check the box if there are any other Arcadis, Client or other party activities that may pose hazards to Arcadis operations lf yes, describe them here: @ How will they be controlled? lf there are none, write "None" here: Not applicable Doc # lwort<ing at Height Energy lsolation (LOTO) !Excavation/Trenching llMecnan¡cal Lifting Ops llOvernead & Buried Utilities !Confined Space Doc #Doc # n Prework Authorization - check activities to be conducted that require permit or completion of a checklist or similar before work begins: Hot Work Other permit D|SCUSS fOllOWing qUeStiOnS gor some rcvtew prev¡ous day's post acttvtttes). CheCk if yeS opics from Corp H&S to cover? nOnt Stop Work lnterventions yesterday? fl.rsn' fit,"u or procedures are available? has appropriate PPE?Staff knows gathering points? All equipment checked & OK? deviations, notify PM & client Field teams to "dirty" JSAs, as needed? knows Emergency Plan (EAP)? Comments. l--l lncidents from day before to review? nOnt corrective actions from yesterday? Lessons learned from the day before? Will any work deviate from plan? the hazards (check all those that are discussed) (Examples are provided) and - Provide an overall assessment of hazards to be encountered today and briefly list them under the hazard category MH)Environment (¡.eElectrical (i.e., util¡ties, lightning) Radiation 1i.e., Drivingn4J.;-';o senerators) (L M H) F n H)(Lticks, motors)G ñ ,''@'u Motion (i.e., traffic, moving water) (L M H)(@rt(i.e., tadder trips) (L @,, atnna@taser) (L M(@tr boat, dozefl (L Mnot fit) (Lnal 0 alone, A"sess the Risks (!ow, Medium, H¡gh - circle (L M H) ! Pr"..rr" (i.e. sas cylinders, wells) (L M H) Chemical (i.e., Juel, acjd, p-aint) ûrw¡,rtd,ililV Document Control Number:TGM - TGM +number s date as follows Rev. 07 05_February_2O16 ARC HSGEOOl ÊARCADIS l*'#ffãï"*" Tailgate pg.l and2 of 2 A Real Commitment, A Daily lssue: Safety TAILGATE HEALTH & SAFETY MEETING FORM -Pg.2 the hazards (Check all and discuss those methods to control the hazards that will be implemented for the day): Review the STOP WORK AUTHORITY (Must be addressed in every Tailgate meeting - (See statements below) Elimination Engineering controls General PPE Usage Substitution Administrative controls Hearing Conservation Exposure Guidelines Fall Protection lsolation Monitoring Respiratory Protection Decon Procedures Work Zones/Site Control Traffic Control Hygiene Emergency Action Plan (EAP) JSA to be developed/used ßpecitv)T ßpecitu ioblJSA) Other ction - Site NamefGompa nylS i gnature lnitial & S¡gn in lnitial & Sign out andTimeTime lmportant Information a Numbers Visitor NamelGo - not involved in work lwill any anyone or site staff should arrive fit for work. lf not, they should uncertain about health & safety or if anyone identifies a hazard or additional mitigation not recorded in the site, project, job or task hazard assessment.report to the supervisor any restr¡ctions or concerns.ln Out ln the event of an injury, employees will call Workcare lwill be alert to any changes in personnel, conditions at the work site or hazards not covered by the orig¡nal hazard assessments. 1 .800.455.6155 and then not¡fy the field supervisor who ll then notify the Project or Task l\4anager.ln Out ln the event of a motor vehicle accident, employees will notify the f¡eld supervisor who will then notify the Project or Task lvlanager.ln Out lf ¡t is necessary to STOP THE JOB, lwill perform TRACK; and then amend the hazard assessments or the HASP as needed. ln the event of a utility strike or other damage to property of a cl¡ent or 3rd party, êmployees will immediately notify the field supervisor, who w¡ll then immediately notify the Project or Task Manager. ln Out lwill not assist a subcontractor or other party w¡th their work unless it is absolutely necessary and then only after I have done TRACK and I have thoroughly Post Dailv Activities Review - Review at end of day or before next day's work (Check those applicable and explain:) ffi t"..on. learned and best practices learned today: ! lncidents that occurred today: n Ont Stop Work interventions today? ! Corrective/Preventive Actions needed for future work: n Ont other H&S issues Keep H&S 1" in all things WorkCare - 1 .888.449.7787 Rev. 07 05_February_201 6 ARC HSGEOOl Tailgate pg.1 and 2 of 2 A Real Commitment, A Daily lssue: Safety GROUNDWATER SAMPLING FORM Project No. Project Name/Location \ gARCADIS p"g" 01 " 01 Date Mlaxl?ÐL\we' rD VKß- I Measuring Pt. Descr¡ption @ s"r""n Sett¡ng (ft-bmp)Tof "f cr,,t¡r,iå 2q-vi Casing D¡ameter (in.) Water Column (ft) Purge Method: Replicate/ Code No. 4" 32.qY toc=$tödt Well Material v Sampled PVC SS ::î:îff:îî 2ç9t ,o,,,o"Rn o,o,5x Gallonsin*", ?\"{F5 Sample '*ö ß(¡,lcrMP Elevation "Pump lntake (nbmp) Volumes Purged 56.'"0 tr{pump onror {3?K sampn rim0 laoet Purge Start Purge End oattons eurgeo Ñ X CentrifugalsubmersibfeF- Other ßlt-tìd-ænrftq ,úr¡rurSrpU* (+qs-trgY) 4 Appearance Color Odort 3o/o --lcond.(qi"$v{'s,"'t Turbid¡ty (NTU) t 1Ùo/o IJO (mg/L) x l0o/o ¡ 3o/o öt¡Redox (mv) t 1omv+ Depth to water (ft) -0.3 Gallons Purged +01 pHTimeMinutes Elapsed (,*,,it*rn^1,(1o \ x1 Ì )o -ltq,ls4N4l "'tat 15.\1")\ 7 $) ("?.,;3 h12 t.L{-?ltt."\(\[):È""^^rl ;ôqq1 r,K 5.5r)-)¿5"\- ,¡t -l\ \¿.-,-qo ?r\t\t?.t" ,4 -))1.2,qr '3\^q '5T1 ) n.G4r^,i),(''ù 5q41 -??'ì,\\¡\4 4?.1 5 ì \t)4 -fì,Çann 53 o.n Ír+hqq ;'i \k :c4 +r,5 131l-r ^.-{l Sj"i.n-çt, nû L'lq51 ¿{,81 Stab¡lization Calculations-JiJ w¡thln 1 (i) *,100/"13%t0.t s.u.t3o/oStabilizatlon Crlterla and i10% or w¡th¡n '1 NTU of a50 t\d'*tl tt eor rese .)r a -5-5 a Comments 34-Urr.t .@ "U.-*lil. fscc-lr l,lir'. Giel Cl,.,t,-j " út=\n.,,\*,c,ru\o""OS0rYOhl "" 411üt 1.5" = o-09 2" = 0.16 3.5" = 0.50 4" = 0.65 .d k Well cas¡ng volumes GailonslFoot l" = 0.04 l'25" = 0.06 Well lnformation 2.5" = 0.26 g. - O.3z 6" = 1.47 V ,lo I Well Location: Condition of Well: Well Locked at Anival: Well Locked at Departure: / Stick Yes Yes Number To Well:Well GROUNDWATER SAMPLING FORM Project No. Project Name/Location gARCADI S^ " 0'\ Well lD Screen Setting ltt-omp¡ volumes Purged - I Callon, Purge¿ P'\2 -¿ J)_4c_ weather arur-lStæã\ Well Material X evC Page Date SS Sample Method sam p I ed ¡f -E(l n C, -!:4]-fo<¡.¡,r [*GS'tXr3) Measuring Pt. Description Stat¡c Water Level 6t-omp¡ MP Elevation - 'Top of rr rlng 3{t$ l"tq\ Casing Diameter (in.) Total Depth mo,c¡ Ç¡1Ç2)watercorumn(o 4t.3tl\ Galronsin*",r t{.121 Pump lntake rt-¡mpl 4Í,\Purge eump On/Otf '{ Sample rime: Saoel Purge Start Purge End 407p 451crlsis other 0 Replicate/ Code No ilS/cm) ?toh AppearanceRedox (mv) r 10mV Color Odor DO (mg/L) +.10%tr,* 0.1 pH Turbid¡ty (Nru) t 1Ùo/o Depth to Water fu -0.3 Gallons Purged Mrnutes Elapsed Rate (gpm)/(mL/m¡n) 200m1/min + T¡me *)rvs llJlu-4rt¿¡Slw."ttì.u?\1l,îl 4JX,1 o.û'..$sP(1Ê û0. -?3ì.?'ì.ìô ôr^l",lû t .?? r^1û 1)çS4t"-f\"Íì;"*:lït1.\\\(tç 1.K21,(,1 t,Î?1q)')(ì4o q * tt.1åï^ -7_a\.5 \st120. v{n ', "4(E lGÀø5-L2 1?_- U. { ¡;.o¡-11fr-'t1¿l..lJ('1^ôKr^ çt), +3KDßrl425?¿5 ,ts - 0, .1"*.^ " - *lt_- -tCIn.q 1s\a\?.1n q1l",LoI,,74(Dc)',;lì \ Stabilization X10o/o ß.h tî0 mVßolowlthln It0,l s,u.Stabilization C¡iterla 1 NTIJ of aor Ct (a. ù \\ a€- -T- L =- 0 < 50 NTU and <10 NT|J Comments Well lnformation on 1.5" = 0.09 2" = 0.16 3" = O.37 3.5" = 0.50 4" = 0.65 101120r8 vvell casing volumes GallonslFoo, 1" = 0.04 1.25,,= 0.06 2.5" = O.26 6" = 1.47 Well Locked at Arrival: Well Locked at DeParture: Yes Yes / Stick Number To Well:Well Well Location: Condition of Well: ÊARCADISGROUNDWATER SAMPLING FORM Project No. Project Name/Location Measuring Pt. Description Static Level (tt-omp) MP Elevation - Pump on/Off_ Sample Time:Luber4{30 Purge Start - Purge End - d_of WEIIID VR6{ I Setting (ftbmp) Casing Diameter (¡n.) rotalo9tn at ¡'pl 51,?10 water cotumn (ft) Pump tntake (ft-bmp) -Sq" OC Purse Method Volumes Purged Gallons Purged 0 o Replicate/ Code No. f,ät5 . ¡it^,n sampred tySúAriItOß@ (+Gets3)) 4o Date Well Mater¡al in Well ss 3C.L4,^g I Other AppearanceTurb¡d¡ty (NTU) *.10o/o DO (mg/t) r 10% q:,Redox (mv) t 1omv Color Odor200m1/min i Rate (gpm)/(mL/min) Depth to water (fÐ -0.3 Gallons Purged pH r 0.'1 Cond. (pMhos)/(mS/cm) + 3o/o Time Minutes Elapsed (L^^.-'tl15(**...'ô \)(û,(;l t 2:ls4'i55 -9K,1brù,${q.%Þ ü,q?, 13s - \ Stabilization Calculat¡ons (t) a tuh 0r w¡th¡n I t10o/o tlYo ll0 mV \t0.l Lu.ßo/oStabllizâtion Criterle EI - û\ar t\erv +- -- = t10o/6 or within 1 NTu of a when rtrH- DaÒ-PH- DPn l$t ilFXn¿¡rl 6Comments n weil uaslng Yorumes GatlonslFoot 1" =O.04 1.25" = 0.06 Well lnformation 6" = 1.47 lush Well Location: Condition of Well Well Locked at Arrival: Well Locked at Departure: / Stick Yes Yes Number To Well:Well 1.5" = 0.09 2" = O-16 2.5" = 0.26 3" E 0.37 3.5" = 0.5O 4" = 0-65 101t2010 E ñÞE E o --9 :. i¡:: ìËÈ-ã] ı 9:3È â PË Ë 2åz "3F$i F: L)à =r"ñl ?\'+- F E\\ I o*t\l !o a o 'ı cU lÈ(tô to! l- Þ3P Ë E XE¿d"^-!!ç45;I ô. I'T(J h ailo :@È : cof i ;dc o ;îd:,.! 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EI08 j95 //r¡\ ouc I *I v 1Ë-[f þ.{-flrH\ylr.¡rüÞ 5ï08 t9s ou ouc X 'fi ?1 I \tf H-qwvlu.¡0þ û9r9 Nn¡xl.l.s x I I I x I 5<lo8 r-o.g l*i àô'P rJ Ë+ì*ãı.s!t¿Of(! <r-{ølø sU o d úC =ó EoI ! Gu G QlEo o Eo .9 o(J co(¿ .9!o G GJ .c!c =ô co Eco o ö t-. 6 EU Föu E r,U- g= -S*¡l<.oæ Érf .EaY>a¡!107_3ı o o E ij: o oô s ooô 'i 6 !6(' o Eo e oè E @ o*zo ;:* ^ç: à=U ÂO Ë e.9o >,::=z P=> 3 ! Ãå 3 I I'rt¡3 À^r eÁ -.qô", ^-9e-iË å sËÈù llll z ço Eo oÀ ü .g!o E .E ! = @É tu oãd ! {t cf"l -rli j" i" t .("\ # l{--¡t-;-r-7f; t:) ç'{' c:)q"- Ë c"l t ;1 a (j -.f.:o: ıo \o UQ 'ì i ,. I It' i I f-l {t'€ f-J \lnl <fq .+$ qK 900a aY'lp tI)ço.!¿ oı rYì o =.1 Fft Þr+ f I1/'\ ,""; ç)r"ì "F Lr q-)Õ t¡; I f ÈÈÈ o¡6uF -gfi¿9üã"tot-r-6x orJu9!o'5 I t-f Iq o ;oú-c È(J{rE-tl Z,E à(E 3. 'e s< co t!..E9o O.- Ì'6 ù(J (=(9 =(9 3(9 3(9 3ro 3(9 3(, co o'Ë oô Ë.toO'=6YN¿iñ { f .: T1 !J :r t oÇn o lfì F{o(Yt itcocÀ .i'? ii i1 rt: cúì t,cl, iri*t..",fri '[ t'l'tr¡ ì ¡'l Eu ,:;t, ,.oIr: d a ! ¡t:(J (v t-', I î ¿'.Ëf- rþ: fJ,** <:l' CYt\Cl:n t -3t-. r-f*,1 l! i g.]:€:({(.: :F, ¡é|^l(-l ,}! ! ':É*ç:d rf.L t¡*I f"._l(i ..: ,t_ ( I r çvlj " (:¿' . Lr-.L- i i'',1]\ i L-)rJ' i"'j :ç.:' I a : q!-4 tr (''r .q: It $, t Appendix C Laboratory Analytical Report and ChainofCustody Documentation ANALYTICAL REPORT November 28, 2023 Arcadis - Chevron - UT Sample Delivery Group:L1677210 Samples Received:11/11/2023 Project Number:30063825 19.44 Description:72804 Site:72804 Report To:Carissa Mason 10 Exchange Place Suite 112 Salt Lake City, UT 84111 Entire Report Reviewed By: November 28, 2023 [Preliminary Report] Brian Ford Project Manager Results relate only to the items tested or calibrated and are reported as rounded values. This test report shall not be reproduced, except in full, without written approval of the laboratory. Where applicable, sampling conducted by Pace Analytical National is performed per guidance provided in laboratory standard operating procedures ENV-SOP-MTJL-0067 and ENV-SOP-MTJL-0068. Where sampling conducted by the customer, results relate to the accuracy of the information provided, and as the samples are received. Pace Analytical National 12065 Lebanon Rd Mount Juliet, TN 37122 615-758-5858 800-767-5859 www.pacenational.com 1 Cp 2 Tc 3 Ss 4 Cn 5 Sr 6 Qc 7 Gl 8 Al 9 Sc ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE: Arcadis - Chevron - UT 30063825 19.44 L1677210 11/28/23 12:56 1 of 19 November 28, 2023 Brian Ford Project Manager ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE: Arcadis - Chevron - UT 30063825 19.44 L1677210 11/28/23 13:09 1 of 19 TABLE OF CONTENTS Cp: Cover Page 1 Tc: Table of Contents 2 Ss: Sample Summary 3 Cn: Case Narrative 4 Sr: Sample Results 5 TB-W-20231109 L1677210-01 5 EB-W-20231108 L1677210-02 6 VRB-8-GW-20231109 L1677210-03 7 VRB-9-GW-20231109 L1677210-04 8 VRB-11-GW-20231109 L1677210-05 9 BD-GW-20231109 L1677210-06 10 Qc: Quality Control Summary 11 Volatile Organic Compounds (GC) by Method 8015D/GRO 11 Volatile Organic Compounds (GC/MS) by Method 8260B 12 Semi-Volatile Organic Compounds (GC) by Method 8015D 14 Gl: Glossary of Terms 17 Al: Accreditations & Locations 18 Sc: Sample Chain of Custody 19 1 Cp 2 Tc 3 Ss 4 Cn 5 Sr 6 Qc 7 Gl 8 Al 9 Sc ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE: Arcadis - Chevron - UT 30063825 19.44 L1677210 11/28/23 12:56 2 of 19 ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE: Arcadis - Chevron - UT 30063825 19.44 L1677210 11/28/23 13:09 2 of 19 SAMPLE SUMMARY Collected by Collected date/time Received date/time TB-W-20231109 L1677210-01 GW Francisco Brown 11/09/23 12:00 11/11/23 08:00 Method Batch Dilution Preparation Analysis Analyst Location date/time date/time Volatile Organic Compounds (GC/MS) by Method 8260B WG2173833 1 11/19/23 07:25 11/19/23 07:25 ACG Mt. Juliet, TN Collected by Collected date/time Received date/time EB-W-20231108 L1677210-02 GW Francisco Brown 11/08/23 12:15 11/11/23 08:00 Method Batch Dilution Preparation Analysis Analyst Location date/time date/time Volatile Organic Compounds (GC) by Method 8015D/GRO WG2172621 1 11/16/23 16:45 11/16/23 16:45 JHH Mt. Juliet, TN Volatile Organic Compounds (GC/MS) by Method 8260B WG2173833 1 11/19/23 08:06 11/19/23 08:06 ACG Mt. Juliet, TN Semi-Volatile Organic Compounds (GC) by Method 8015D WG2172154 1 11/16/23 13:06 11/19/23 12:12 TGB Mt. Juliet, TN Semi-Volatile Organic Compounds (GC) by Method 8015D WG2172155 1 11/16/23 13:08 11/20/23 02:19 DMG Mt. Juliet, TN Semi-Volatile Organic Compounds (GC) by Method 8015D WG2176672 1 11/23/23 02:37 11/23/23 16:08 TGB Mt. Juliet, TN Collected by Collected date/time Received date/time VRB-8-GW-20231109 L1677210-03 GW Francisco Brown 11/09/23 09:34 11/11/23 08:00 Method Batch Dilution Preparation Analysis Analyst Location date/time date/time Volatile Organic Compounds (GC) by Method 8015D/GRO WG2172621 50 11/16/23 21:48 11/16/23 21:48 JHH Mt. Juliet, TN Volatile Organic Compounds (GC/MS) by Method 8260B WG2173833 500 11/19/23 13:30 11/19/23 13:30 ACG Mt. Juliet, TN Semi-Volatile Organic Compounds (GC) by Method 8015D WG2172154 50 11/16/23 13:06 11/22/23 12:14 MAA Mt. Juliet, TN Semi-Volatile Organic Compounds (GC) by Method 8015D WG2172155 20 11/16/23 13:08 11/22/23 11:14 MAA Mt. Juliet, TN Collected by Collected date/time Received date/time VRB-9-GW-20231109 L1677210-04 GW Francisco Brown 11/09/23 11:30 11/11/23 08:00 Method Batch Dilution Preparation Analysis Analyst Location date/time date/time Volatile Organic Compounds (GC) by Method 8015D/GRO WG2172621 20 11/16/23 22:10 11/16/23 22:10 JHH Mt. Juliet, TN Volatile Organic Compounds (GC/MS) by Method 8260B WG2173833 20 11/19/23 11:49 11/19/23 11:49 ACG Mt. Juliet, TN Semi-Volatile Organic Compounds (GC) by Method 8015D WG2172154 50 11/16/23 13:06 11/22/23 12:34 MAA Mt. Juliet, TN Semi-Volatile Organic Compounds (GC) by Method 8015D WG2172155 10 11/16/23 13:08 11/22/23 10:55 MAA Mt. Juliet, TN Collected by Collected date/time Received date/time VRB-11-GW-20231109 L1677210-05 GW Francisco Brown 11/09/23 10:20 11/11/23 08:00 Method Batch Dilution Preparation Analysis Analyst Location date/time date/time Volatile Organic Compounds (GC) by Method 8015D/GRO WG2172621 100 11/16/23 22:32 11/16/23 22:32 JHH Mt. Juliet, TN Volatile Organic Compounds (GC/MS) by Method 8260B WG2173833 100 11/19/23 12:50 11/19/23 12:50 ACG Mt. Juliet, TN Semi-Volatile Organic Compounds (GC) by Method 8015D WG2172154 100 11/16/23 13:06 11/22/23 13:14 MAA Mt. Juliet, TN Semi-Volatile Organic Compounds (GC) by Method 8015D WG2172155 50 11/16/23 13:08 11/22/23 11:54 MAA Mt. Juliet, TN Collected by Collected date/time Received date/time BD-GW-20231109 L1677210-06 GW Francisco Brown 11/09/23 12:00 11/11/23 08:00 Method Batch Dilution Preparation Analysis Analyst Location date/time date/time Volatile Organic Compounds (GC) by Method 8015D/GRO WG2172621 20 11/16/23 22:54 11/16/23 22:54 JHH Mt. Juliet, TN Volatile Organic Compounds (GC/MS) by Method 8260B WG2173833 20 11/19/23 12:09 11/19/23 12:09 ACG Mt. Juliet, TN Volatile Organic Compounds (GC/MS) by Method 8260B WG2174554 500 11/21/23 01:32 11/21/23 01:32 JHH Mt. Juliet, TN Semi-Volatile Organic Compounds (GC) by Method 8015D WG2172154 50 11/16/23 13:06 11/22/23 12:54 MAA Mt. Juliet, TN Semi-Volatile Organic Compounds (GC) by Method 8015D WG2172155 20 11/16/23 13:08 11/22/23 11:34 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: Arcadis - Chevron - UT 30063825 19.44 L1677210 11/28/23 12:56 3 of 19 ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE: Arcadis - Chevron - UT 30063825 19.44 L1677210 11/28/23 13:09 3 of 19 CASE NARRATIVE All sample aliquots were received at the correct temperature, in the proper containers, with the appropriate preservatives, and within method specified holding times, unless qualified or notated within the report. Where applicable, all MDL (LOD) and RDL (LOQ) values reported for environmental samples have been corrected for the dilution factor used in the analysis. All Method and Batch Quality Control are within established criteria except where addressed in this case narrative, a non-conformance form or properly qualified within the sample results. By my digital signature below, I affirm to the best of my knowledge, all problems/anomalies observed by the laboratory as having the potential to affect the quality of the data have been identified by the laboratory, and no information or data have been knowingly withheld that would affect the quality of the data. [Preliminary Report] Brian Ford Project Manager 1 Cp 2 Tc 3 Ss 4 Cn 5 Sr 6 Qc 7 Gl 8 Al 9 Sc ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE: Arcadis - Chevron - UT 30063825 19.44 L1677210 11/28/23 12:56 4 of 19 Brian Ford Project Manager ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE: Arcadis - Chevron - UT 30063825 19.44 L1677210 11/28/23 13:09 4 of 19 SAMPLE RESULTS - 01 L1677210 TB-W-20231109 Collected date/time: 11/09/23 12:00 Volatile Organic Compounds (GC/MS) by Method 8260B Result Qualifier MDL RDL Dilution Analysis Batch Analyte mg/l mg/l mg/l date / time Benzene U 0.0000941 0.00100 1 11/19/2023 07:25 WG2173833 Toluene U 0.000278 0.00100 1 11/19/2023 07:25 WG2173833 Ethylbenzene U 0.000137 0.00100 1 11/19/2023 07:25 WG2173833 o-Xylene U 0.000174 0.00100 1 11/19/2023 07:25 WG2173833 m&p-Xylene U 0.000430 0.00200 1 11/19/2023 07:25 WG2173833 Total Xylenes U 0.000174 0.00300 1 11/19/2023 07:25 WG2173833 Methyl tert-butyl ether U 0.000101 0.00100 1 11/19/2023 07:25 WG2173833 Naphthalene U 0.00100 0.00500 1 11/19/2023 07:25 WG2173833 (S) Toluene-d8 107 80.0-120 11/19/2023 07:25 WG2173833 (S) 4-Bromofluorobenzene 97.6 77.0-126 11/19/2023 07:25 WG2173833 (S) 1,2-Dichloroethane-d4 109 70.0-130 11/19/2023 07:25 WG2173833 1 Cp 2 Tc 3 Ss 4 Cn 5 Sr 6 Qc 7 Gl 8 Al 9 Sc ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE: Arcadis - Chevron - UT 30063825 19.44 L1677210 11/28/23 12:56 5 of 19 ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE: Arcadis - Chevron - UT 30063825 19.44 L1677210 11/28/23 13:09 5 of 19 SAMPLE RESULTS - 02 L1677210 EB-W-20231108 Collected date/time: 11/08/23 12:15 Volatile Organic Compounds (GC) by Method 8015D/GRO Result Qualifier MDL RDL Dilution Analysis Batch Analyte mg/l mg/l mg/l date / time TPH (GC/FID) Low Fraction U 0.0314 0.100 1 11/16/2023 16:45 WG2172621 (S) a,a,a-Trifluorotoluene(FID)108 78.0-120 11/16/2023 16:45 WG2172621 Volatile Organic Compounds (GC/MS) by Method 8260B Result Qualifier MDL RDL Dilution Analysis Batch Analyte mg/l mg/l mg/l date / time Benzene U 0.0000941 0.00100 1 11/19/2023 08:06 WG2173833 Toluene U 0.000278 0.00100 1 11/19/2023 08:06 WG2173833 Ethylbenzene U 0.000137 0.00100 1 11/19/2023 08:06 WG2173833 o-Xylene U 0.000174 0.00100 1 11/19/2023 08:06 WG2173833 m&p-Xylene U 0.000430 0.00200 1 11/19/2023 08:06 WG2173833 Total Xylenes U 0.000174 0.00300 1 11/19/2023 08:06 WG2173833 Methyl tert-butyl ether U 0.000101 0.00100 1 11/19/2023 08:06 WG2173833 Naphthalene U 0.00100 0.00500 1 11/19/2023 08:06 WG2173833 (S) Toluene-d8 110 80.0-120 11/19/2023 08:06 WG2173833 (S) 4-Bromofluorobenzene 99.4 77.0-126 11/19/2023 08:06 WG2173833 (S) 1,2-Dichloroethane-d4 108 70.0-130 11/19/2023 08:06 WG2173833 Semi-Volatile Organic Compounds (GC) by Method 8015D Result Qualifier MDL RDL Dilution Analysis Batch Analyte mg/l mg/l mg/l date / time DRO w/ SGT U 0.0247 0.100 1 11/20/2023 02:19 WG2172155 TPH (GC/FID) High Fraction 0.113 0.0247 0.100 1 11/19/2023 12:12 WG2172154 TPH (GC/FID) High Fraction 0.0769 B J Q 0.0247 0.100 1 11/23/2023 16:08 WG2176672 (S) o-Terphenyl 108 31.0-160 11/19/2023 12:12 WG2172154 (S) o-Terphenyl 94.2 52.0-156 11/20/2023 02:19 WG2172155 (S) o-Terphenyl 123 31.0-160 11/23/2023 16:08 WG2176672 Sample Narrative: L1677210-02 WG2176672: Analyzed 2x with slightly differing results, reporting both sets. 1 Cp 2 Tc 3 Ss 4 Cn 5 Sr 6 Qc 7 Gl 8 Al 9 Sc ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE: Arcadis - Chevron - UT 30063825 19.44 L1677210 11/28/23 12:56 6 of 19 ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE: Arcadis - Chevron - UT 30063825 19.44 L1677210 11/28/23 13:09 6 of 19 SAMPLE RESULTS - 03 L1677210 VRB-8-GW-20231109 Collected date/time: 11/09/23 09:34 Volatile Organic Compounds (GC) by Method 8015D/GRO Result Qualifier MDL RDL Dilution Analysis Batch Analyte mg/l mg/l mg/l date / time TPH (GC/FID) Low Fraction 158 1.57 5.00 50 11/16/2023 21:48 WG2172621 (S) a,a,a-Trifluorotoluene(FID)105 78.0-120 11/16/2023 21:48 WG2172621 Volatile Organic Compounds (GC/MS) by Method 8260B Result Qualifier MDL RDL Dilution Analysis Batch Analyte mg/l mg/l mg/l date / time Benzene 16.4 0.0471 0.500 500 11/19/2023 13:30 WG2173833 Toluene 18.1 0.139 0.500 500 11/19/2023 13:30 WG2173833 Ethylbenzene 1.36 0.0685 0.500 500 11/19/2023 13:30 WG2173833 o-Xylene 3.95 0.0870 0.500 500 11/19/2023 13:30 WG2173833 m&p-Xylene 8.31 0.215 1.00 500 11/19/2023 13:30 WG2173833 Total Xylenes 12.3 0.0870 1.50 500 11/19/2023 13:30 WG2173833 Methyl tert-butyl ether 0.0546 J 0.0505 0.500 500 11/19/2023 13:30 WG2173833 Naphthalene 0.545 J 0.500 2.50 500 11/19/2023 13:30 WG2173833 (S) Toluene-d8 107 80.0-120 11/19/2023 13:30 WG2173833 (S) 4-Bromofluorobenzene 103 77.0-126 11/19/2023 13:30 WG2173833 (S) 1,2-Dichloroethane-d4 97.1 70.0-130 11/19/2023 13:30 WG2173833 Semi-Volatile Organic Compounds (GC) by Method 8015D Result Qualifier MDL RDL Dilution Analysis Batch Analyte mg/l mg/l mg/l date / time DRO w/ SGT 132 0.494 2.00 20 11/22/2023 11:14 WG2172155 TPH (GC/FID) High Fraction 262 1.23 5.00 50 11/22/2023 12:14 WG2172154 (S) o-Terphenyl 0.000 J7 31.0-160 11/22/2023 12:14 WG2172154 (S) o-Terphenyl 0.000 J7 52.0-156 11/22/2023 11:14 WG2172155 1 Cp 2 Tc 3 Ss 4 Cn 5 Sr 6 Qc 7 Gl 8 Al 9 Sc ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE: Arcadis - Chevron - UT 30063825 19.44 L1677210 11/28/23 12:56 7 of 19 ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE: Arcadis - Chevron - UT 30063825 19.44 L1677210 11/28/23 13:09 7 of 19 SAMPLE RESULTS - 04 L1677210 VRB-9-GW-20231109 Collected date/time: 11/09/23 11:30 Volatile Organic Compounds (GC) by Method 8015D/GRO Result Qualifier MDL RDL Dilution Analysis Batch Analyte mg/l mg/l mg/l date / time TPH (GC/FID) Low Fraction 64.3 0.628 2.00 20 11/16/2023 22:10 WG2172621 (S) a,a,a-Trifluorotoluene(FID)106 78.0-120 11/16/2023 22:10 WG2172621 Volatile Organic Compounds (GC/MS) by Method 8260B Result Qualifier MDL RDL Dilution Analysis Batch Analyte mg/l mg/l mg/l date / time Benzene 2.06 0.00188 0.0200 20 11/19/2023 11:49 WG2173833 Toluene 2.84 0.00556 0.0200 20 11/19/2023 11:49 WG2173833 Ethylbenzene 0.312 0.00274 0.0200 20 11/19/2023 11:49 WG2173833 o-Xylene 3.89 0.00348 0.0200 20 11/19/2023 11:49 WG2173833 m&p-Xylene 6.50 0.00860 0.0400 20 11/19/2023 11:49 WG2173833 Total Xylenes 10.4 0.00348 0.0600 20 11/19/2023 11:49 WG2173833 Methyl tert-butyl ether 0.00243 J 0.00202 0.0200 20 11/19/2023 11:49 WG2173833 Naphthalene 0.317 0.0200 0.100 20 11/19/2023 11:49 WG2173833 (S) Toluene-d8 104 80.0-120 11/19/2023 11:49 WG2173833 (S) 4-Bromofluorobenzene 104 77.0-126 11/19/2023 11:49 WG2173833 (S) 1,2-Dichloroethane-d4 103 70.0-130 11/19/2023 11:49 WG2173833 Semi-Volatile Organic Compounds (GC) by Method 8015D Result Qualifier MDL RDL Dilution Analysis Batch Analyte mg/l mg/l mg/l date / time DRO w/ SGT 66.1 0.247 1.00 10 11/22/2023 10:55 WG2172155 TPH (GC/FID) High Fraction 99.6 1.23 5.00 50 11/22/2023 12:34 WG2172154 (S) o-Terphenyl 0.000 J7 31.0-160 11/22/2023 12:34 WG2172154 (S) o-Terphenyl 73.2 52.0-156 11/22/2023 10:55 WG2172155 1 Cp 2 Tc 3 Ss 4 Cn 5 Sr 6 Qc 7 Gl 8 Al 9 Sc ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE: Arcadis - Chevron - UT 30063825 19.44 L1677210 11/28/23 12:56 8 of 19 ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE: Arcadis - Chevron - UT 30063825 19.44 L1677210 11/28/23 13:09 8 of 19 SAMPLE RESULTS - 05 L1677210 VRB-11-GW-20231109 Collected date/time: 11/09/23 10:20 Volatile Organic Compounds (GC) by Method 8015D/GRO Result Qualifier MDL RDL Dilution Analysis Batch Analyte mg/l mg/l mg/l date / time TPH (GC/FID) Low Fraction 136 3.14 10.0 100 11/16/2023 22:32 WG2172621 (S) a,a,a-Trifluorotoluene(FID)108 78.0-120 11/16/2023 22:32 WG2172621 Volatile Organic Compounds (GC/MS) by Method 8260B Result Qualifier MDL RDL Dilution Analysis Batch Analyte mg/l mg/l mg/l date / time Benzene 2.90 0.00941 0.100 100 11/19/2023 12:50 WG2173833 Toluene 6.81 0.0278 0.100 100 11/19/2023 12:50 WG2173833 Ethylbenzene 0.716 0.0137 0.100 100 11/19/2023 12:50 WG2173833 o-Xylene 5.77 0.0174 0.100 100 11/19/2023 12:50 WG2173833 m&p-Xylene 12.3 0.0430 0.200 100 11/19/2023 12:50 WG2173833 Total Xylenes 18.1 0.0174 0.300 100 11/19/2023 12:50 WG2173833 Methyl tert-butyl ether 0.0117 J 0.0101 0.100 100 11/19/2023 12:50 WG2173833 Naphthalene 0.655 0.100 0.500 100 11/19/2023 12:50 WG2173833 (S) Toluene-d8 105 80.0-120 11/19/2023 12:50 WG2173833 (S) 4-Bromofluorobenzene 104 77.0-126 11/19/2023 12:50 WG2173833 (S) 1,2-Dichloroethane-d4 98.9 70.0-130 11/19/2023 12:50 WG2173833 Semi-Volatile Organic Compounds (GC) by Method 8015D Result Qualifier MDL RDL Dilution Analysis Batch Analyte mg/l mg/l mg/l date / time DRO w/ SGT 213 1.23 5.00 50 11/22/2023 11:54 WG2172155 TPH (GC/FID) High Fraction 298 2.47 10.0 100 11/22/2023 13:14 WG2172154 (S) o-Terphenyl 0.000 J7 31.0-160 11/22/2023 13:14 WG2172154 (S) o-Terphenyl 0.000 J7 52.0-156 11/22/2023 11:54 WG2172155 1 Cp 2 Tc 3 Ss 4 Cn 5 Sr 6 Qc 7 Gl 8 Al 9 Sc ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE: Arcadis - Chevron - UT 30063825 19.44 L1677210 11/28/23 12:56 9 of 19 ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE: Arcadis - Chevron - UT 30063825 19.44 L1677210 11/28/23 13:09 9 of 19 SAMPLE RESULTS - 06 L1677210 BD-GW-20231109 Collected date/time: 11/09/23 12:00 Volatile Organic Compounds (GC) by Method 8015D/GRO Result Qualifier MDL RDL Dilution Analysis Batch Analyte mg/l mg/l mg/l date / time TPH (GC/FID) Low Fraction 159 0.628 2.00 20 11/16/2023 22:54 WG2172621 (S) a,a,a-Trifluorotoluene(FID)106 78.0-120 11/16/2023 22:54 WG2172621 Volatile Organic Compounds (GC/MS) by Method 8260B Result Qualifier MDL RDL Dilution Analysis Batch Analyte mg/l mg/l mg/l date / time Benzene 16.4 0.0471 0.500 500 11/21/2023 01:32 WG2174554 Toluene 16.9 0.139 0.500 500 11/21/2023 01:32 WG2174554 Ethylbenzene 1.27 0.00274 0.0200 20 11/19/2023 12:09 WG2173833 o-Xylene 3.66 0.00348 0.0200 20 11/19/2023 12:09 WG2173833 m&p-Xylene 7.47 0.00860 0.0400 20 11/19/2023 12:09 WG2173833 Total Xylenes 11.1 0.00348 0.0600 20 11/19/2023 12:09 WG2173833 Methyl tert-butyl ether 0.0542 0.00202 0.0200 20 11/19/2023 12:09 WG2173833 Naphthalene 0.589 0.0200 0.100 20 11/19/2023 12:09 WG2173833 (S) Toluene-d8 103 80.0-120 11/19/2023 12:09 WG2173833 (S) Toluene-d8 102 80.0-120 11/21/2023 01:32 WG2174554 (S) 4-Bromofluorobenzene 105 77.0-126 11/19/2023 12:09 WG2173833 (S) 4-Bromofluorobenzene 95.7 77.0-126 11/21/2023 01:32 WG2174554 (S) 1,2-Dichloroethane-d4 105 70.0-130 11/19/2023 12:09 WG2173833 (S) 1,2-Dichloroethane-d4 121 70.0-130 11/21/2023 01:32 WG2174554 Semi-Volatile Organic Compounds (GC) by Method 8015D Result Qualifier MDL RDL Dilution Analysis Batch Analyte mg/l mg/l mg/l date / time DRO w/ SGT 140 0.494 2.00 20 11/22/2023 11:34 WG2172155 TPH (GC/FID) High Fraction 286 1.23 5.00 50 11/22/2023 12:54 WG2172154 (S) o-Terphenyl 0.000 J7 31.0-160 11/22/2023 12:54 WG2172154 (S) o-Terphenyl 0.000 J7 52.0-156 11/22/2023 11:34 WG2172155 1 Cp 2 Tc 3 Ss 4 Cn 5 Sr 6 Qc 7 Gl 8 Al 9 Sc ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE: Arcadis - Chevron - UT 30063825 19.44 L1677210 11/28/23 12:56 10 of 19 ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE: Arcadis - Chevron - UT 30063825 19.44 L1677210 11/28/23 13:09 10 of 19 QUALITY CONTROL SUMMARYWG2172621 Volatile Organic Compounds (GC) by Method 8015D/GRO L1677210-02,03,04,05,06 Method Blank (MB) (MB) R4001233-2 11/16/23 15:36 MB Result MB Qualifier MB MDL MB RDL Analyte mg/l mg/l mg/l TPH (GC/FID) Low Fraction U 0.0314 0.100 (S) a,a,a-Trifluorotoluene(FID)107 78.0-120 Laboratory Control Sample (LCS) (LCS) R4001233-1 11/16/23 14:48 Spike Amount LCS Result LCS Rec.Rec. Limits LCS Qualifier Analyte mg/l mg/l %% TPH (GC/FID) Low Fraction 5.50 4.79 87.1 72.0-127 (S) a,a,a-Trifluorotoluene(FID) 106 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: Arcadis - Chevron - UT 30063825 19.44 L1677210 11/28/23 12:56 11 of 19 ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE: Arcadis - Chevron - UT 30063825 19.44 L1677210 11/28/23 13:09 11 of 19 QUALITY CONTROL SUMMARYWG2173833 Volatile Organic Compounds (GC/MS) by Method 8260B L1677210-01,02,03,04,05,06 Method Blank (MB) (MB) R4002134-3 11/19/23 06:44 MB Result MB Qualifier MB MDL MB RDL Analyte mg/l mg/l mg/l Benzene U 0.0000941 0.00100 Toluene U 0.000278 0.00100 Ethylbenzene U 0.000137 0.00100 o-Xylene U 0.000174 0.00100 m&p-Xylene U 0.000430 0.00200 Total Xylenes U 0.000174 0.00300 Methyl tert-butyl ether U 0.000101 0.00100 Naphthalene U 0.00100 0.00500 (S) Toluene-d8 108 80.0-120 (S) 4-Bromofluorobenzene 95.3 77.0-126 (S) 1,2-Dichloroethane-d4 110 70.0-130 Laboratory Control Sample (LCS) • Laboratory Control Sample Duplicate (LCSD) (LCS) R4002134-1 11/19/23 05:43 • (LCSD) R4002134-2 11/19/23 06:03 Spike Amount LCS Result LCSD Result LCS Rec.LCSD Rec.Rec. Limits LCS Qualifier LCSD Qualifier RPD RPD Limits Analyte mg/l mg/l mg/l %%%%% Benzene 0.00500 0.00424 0.00454 84.8 90.8 70.0-123 6.83 20 Toluene 0.00500 0.00459 0.00470 91.8 94.0 79.0-120 2.37 20 Ethylbenzene 0.00500 0.00460 0.00475 92.0 95.0 79.0-123 3.21 20 o-Xylene 0.00500 0.00439 0.00456 87.8 91.2 80.0-122 3.80 20 m&p-Xylene 0.0100 0.00922 0.00934 92.2 93.4 80.0-122 1.29 20 Total Xylenes 0.0150 0.0136 0.0139 90.7 92.7 79.0-123 2.18 20 Methyl tert-butyl ether 0.00500 0.00445 0.00461 89.0 92.2 68.0-125 3.53 20 Naphthalene 0.00500 0.00490 0.00533 98.0 107 54.0-135 8.41 20 (S) Toluene-d8 103 103 80.0-120 (S) 4-Bromofluorobenzene 98.0 97.4 77.0-126 (S) 1,2-Dichloroethane-d4 105 103 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: Arcadis - Chevron - UT 30063825 19.44 L1677210 11/28/23 12:56 12 of 19 ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE: Arcadis - Chevron - UT 30063825 19.44 L1677210 11/28/23 13:09 12 of 19 QUALITY CONTROL SUMMARYWG2174554 Volatile Organic Compounds (GC/MS) by Method 8260B L1677210-06 Method Blank (MB) (MB) R4004466-2 11/20/23 22:28 MB Result MB Qualifier MB MDL MB RDL Analyte mg/l mg/l mg/l Benzene U 0.0000941 0.00100 Toluene U 0.000278 0.00100 (S) Toluene-d8 100 80.0-120 (S) 4-Bromofluorobenzene 97.7 77.0-126 (S) 1,2-Dichloroethane-d4 127 70.0-130 Laboratory Control Sample (LCS) (LCS) R4004466-1 11/20/23 21:44 Spike Amount LCS Result LCS Rec.Rec. Limits LCS Qualifier Analyte mg/l mg/l %% Benzene 0.00500 0.00460 92.0 70.0-123 Toluene 0.00500 0.00468 93.6 79.0-120 (S) Toluene-d8 101 80.0-120 (S) 4-Bromofluorobenzene 99.4 77.0-126 (S) 1,2-Dichloroethane-d4 126 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: Arcadis - Chevron - UT 30063825 19.44 L1677210 11/28/23 12:56 13 of 19 ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE: Arcadis - Chevron - UT 30063825 19.44 L1677210 11/28/23 13:09 13 of 19 QUALITY CONTROL SUMMARYWG2172154 Semi-Volatile Organic Compounds (GC) by Method 8015D L1677210-02,03,04,05,06 Method Blank (MB) (MB) R4002567-1 11/19/23 08:54 MB Result MB Qualifier MB MDL MB RDL Analyte mg/l mg/l mg/l TPH (GC/FID) High Fraction U 0.0247 0.100 (S) o-Terphenyl 108 31.0-160 Laboratory Control Sample (LCS) • Laboratory Control Sample Duplicate (LCSD) (LCS) R4002567-2 11/19/23 09:13 • (LCSD) R4002567-3 11/19/23 09:33 Spike Amount LCS Result LCSD Result LCS Rec.LCSD Rec.Rec. Limits LCS Qualifier LCSD Qualifier RPD RPD Limits Analyte mg/l mg/l mg/l %%%%% TPH (GC/FID) High Fraction 1.50 1.72 1.71 115 114 50.0-150 0.583 20 (S) o-Terphenyl 93.0 81.0 31.0-160 1 Cp 2 Tc 3 Ss 4 Cn 5 Sr 6 Qc 7 Gl 8 Al 9 Sc ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE: Arcadis - Chevron - UT 30063825 19.44 L1677210 11/28/23 12:56 14 of 19 ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE: Arcadis - Chevron - UT 30063825 19.44 L1677210 11/28/23 13:09 14 of 19 QUALITY CONTROL SUMMARYWG2172155 Semi-Volatile Organic Compounds (GC) by Method 8015D L1677210-02,03,04,05,06 Method Blank (MB) (MB) R4002568-1 11/19/23 23:10 MB Result MB Qualifier MB MDL MB RDL Analyte mg/l mg/l mg/l DRO w/ SGT 0.0469 J 0.0247 0.100 (S) o-Terphenyl 104 52.0-156 Laboratory Control Sample (LCS) • Laboratory Control Sample Duplicate (LCSD) (LCS) R4002568-2 11/19/23 23:30 • (LCSD) R4002568-3 11/19/23 23:49 Spike Amount LCS Result LCSD Result LCS Rec.LCSD Rec.Rec. Limits LCS Qualifier LCSD Qualifier RPD RPD Limits Analyte mg/l mg/l mg/l %%%%% DRO w/ SGT 1.50 1.51 1.46 101 97.3 50.0-150 3.37 20 (S) o-Terphenyl 75.5 64.5 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: Arcadis - Chevron - UT 30063825 19.44 L1677210 11/28/23 12:56 15 of 19 ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE: Arcadis - Chevron - UT 30063825 19.44 L1677210 11/28/23 13:09 15 of 19 QUALITY CONTROL SUMMARYWG2176672 Semi-Volatile Organic Compounds (GC) by Method 8015D L1677210-02 Method Blank (MB) (MB) R4003918-1 11/23/23 13:07 MB Result MB Qualifier MB MDL MB RDL Analyte mg/l mg/l mg/l TPH (GC/FID) High Fraction 0.0330 J 0.0247 0.100 (S) o-Terphenyl 113 31.0-160 Laboratory Control Sample (LCS) • Laboratory Control Sample Duplicate (LCSD) (LCS) R4003918-2 11/23/23 13:27 • (LCSD) R4003918-3 11/23/23 13:47 Spike Amount LCS Result LCSD Result LCS Rec.LCSD Rec.Rec. Limits LCS Qualifier LCSD Qualifier RPD RPD Limits Analyte mg/l mg/l mg/l %%%%% TPH (GC/FID) High Fraction 1.50 1.60 1.65 107 110 50.0-150 3.08 20 (S) o-Terphenyl 146 148 31.0-160 1 Cp 2 Tc 3 Ss 4 Cn 5 Sr 6 Qc 7 Gl 8 Al 9 Sc ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE: Arcadis - Chevron - UT 30063825 19.44 L1677210 11/28/23 12:56 16 of 19 ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE: Arcadis - Chevron - UT 30063825 19.44 L1677210 11/28/23 13:09 16 of 19 GLOSSARY OF TERMS Guide to Reading and Understanding Your Laboratory Report The information below is designed to better explain the various terms used in your report of analytical results from the Laboratory. This is not intended as a comprehensive explanation, and if you have additional questions please contact your project representative. Results Disclaimer - Information that may be provided by the customer, and contained within this report, include Permit Limits, Project Name, Sample ID, Sample Matrix, Sample Preservation, Field Blanks, Field Spikes, Field Duplicates, On-Site Data, Sampling Collection Dates/Times, and Sampling Location. Results relate to the accuracy of this information provided, and as the samples are received. Abbreviations and Definitions MDL Method Detection Limit. RDL Reported Detection Limit. Rec.Recovery. RPD Relative Percent Difference. SDG Sample Delivery Group. (S) Surrogate (Surrogate Standard) - Analytes added to every blank, sample, Laboratory Control Sample/Duplicate and Matrix Spike/Duplicate; used to evaluate analytical efficiency by measuring recovery. Surrogates are not expected to be detected in all environmental media. U Not detected at the Reporting Limit (or MDL where applicable). Analyte The name of the particular compound or analysis performed. Some Analyses and Methods will have multiple analytes reported. Dilution If the sample matrix contains an interfering material, the sample preparation volume or weight values differ from the standard, or if concentrations of analytes in the sample are higher than the highest limit of concentration that the laboratory can accurately report, the sample may be diluted for analysis. If a value different than 1 is used in this field, the result reported has already been corrected for this factor. Limits These are the target % recovery ranges or % difference value that the laboratory has historically determined as normal for the method and analyte being reported. Successful QC Sample analysis will target all analytes recovered or duplicated within these ranges. Qualifier This column provides a letter and/or number designation that corresponds to additional information concerning the result reported. If a Qualifier is present, a definition per Qualifier is provided within the Glossary and Definitions page and potentially a discussion of possible implications of the Qualifier in the Case Narrative if applicable. Result The actual analytical final result (corrected for any sample specific characteristics) reported for your sample. If there was no measurable result returned for a specific analyte, the result in this column may state “ND” (Not Detected) or “BDL” (Below Detectable Levels). The information in the results column should always be accompanied by either an MDL (Method Detection Limit) or RDL (Reporting Detection Limit) that defines the lowest value that the laboratory could detect or report for this analyte. Uncertainty (Radiochemistry)Confidence level of 2 sigma. Case Narrative (Cn) A brief discussion about the included sample results, including a discussion of any non-conformances to protocol observed either at sample receipt by the laboratory from the field or during the analytical process. If present, there will be a section in the Case Narrative to discuss the meaning of any data qualifiers used in the report. Quality Control Summary (Qc) This section of the report includes the results of the laboratory quality control analyses required by procedure or analytical methods to assist in evaluating the validity of the results reported for your samples. These analyses are not being performed on your samples typically, but on laboratory generated material. Sample Chain of Custody (Sc) This is the document created in the field when your samples were initially collected. This is used to verify the time and date of collection, the person collecting the samples, and the analyses that the laboratory is requested to perform. This chain of custody also documents all persons (excluding commercial shippers) that have had control or possession of the samples from the time of collection until delivery to the laboratory for analysis. Sample Results (Sr) This section of your report will provide the results of all testing performed on your samples. These results are provided by sample ID and are separated by the analyses performed on each sample. The header line of each analysis section for each sample will provide the name and method number for the analysis reported. Sample Summary (Ss)This section of the Analytical Report defines the specific analyses performed for each sample ID, including the dates and times of preparation and/or analysis. Qualifier Description B The same analyte is found in the associated blank. J The identification of the analyte is acceptable; the reported value is an estimate. J7 Surrogate recovery cannot be used for control limit evaluation due to dilution. Q Sample was prepared and/or analyzed past holding time as defined in the method. Concentrations should be considered minimum values. 1 Cp 2 Tc 3 Ss 4 Cn 5 Sr 6 Qc 7 Gl 8 Al 9 Sc ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE: Arcadis - Chevron - UT 30063825 19.44 L1677210 11/28/23 12:56 17 of 19 ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE: Arcadis - Chevron - UT 30063825 19.44 L1677210 11/28/23 13:09 17 of 19 Pace Analytical National 12065 Lebanon Rd Mount Juliet, TN 37122 Alabama 40660 Nebraska NE-OS-15-05 Alaska 17-026 Nevada TN000032021-1 Arizona AZ0612 New Hampshire 2975 Arkansas 88-0469 New Jersey–NELAP TN002 California 2932 New Mexico ¹TN00003 Colorado TN00003 New York 11742 Connecticut PH-0197 North Carolina Env375 Florida E87487 North Carolina ¹DW21704 Georgia NELAP North Carolina ³41 Georgia ¹923 North Dakota R-140 Idaho TN00003 Ohio–VAP CL0069 Illinois 200008 Oklahoma 9915 Indiana C-TN-01 Oregon TN200002 Iowa 364 Pennsylvania 68-02979 Kansas E-10277 Rhode Island LAO00356 Kentucky ¹ ⁶KY90010 South Carolina 84004002 Kentucky ²16 South Dakota n/a Louisiana AI30792 Tennessee ¹ ⁴2006 Louisiana LA018 Texas T104704245-20-18 Maine TN00003 Texas ⁵LAB0152 Maryland 324 Utah TN000032021-11 Massachusetts M-TN003 Vermont VT2006 Michigan 9958 Virginia 110033 Minnesota 047-999-395 Washington C847 Mississippi TN00003 West Virginia 233 Missouri 340 Wisconsin 998093910 Montana CERT0086 Wyoming A2LA A2LA – ISO 17025 1461.01 AIHA-LAP,LLC EMLAP 100789 A2LA – ISO 17025 ⁵1461.02 DOD 1461.01 Canada 1461.01 USDA P330-15-00234 EPA–Crypto TN00003 ACCREDITATIONS & LOCATIONS ¹ Drinking Water ² Underground Storage Tanks ³ Aquatic Toxicity ⁴ Chemical/Microbiological ⁵ Mold ⁶ Wastewater n/a Accreditation not applicable * Not all certifications held by the laboratory are applicable to the results reported in the attached report. * Accreditation is only applicable to the test methods specified on each scope of accreditation held by Pace Analytical. 1 Cp 2 Tc 3 Ss 4 Cn 5 Sr 6 Qc 7 Gl 8 Al 9 Sc ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE: Arcadis - Chevron - UT 30063825 19.44 L1677210 11/28/23 12:56 18 of 19 ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE: Arcadis - Chevron - UT 30063825 19.44 L1677210 11/28/23 13:09 18 of 19