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Home My WebLink AboutDERR-2025-008762Operations & Maintenance Report 2025 First and Second Quarters UTA/Pallas Yard Post-Removal Action Pallas Yard 5300-5900 South 300 West Murray, Utah June 20, 2025 Terracon Project No. 61197043 Prepared for: Utah Transit Authority Salt Lake City, Utah Prepared by: Terracon Consultants, Inc. Midvale, Utah June 20, 2025 Utah Transit Authority 669 West 200 South Salt Lake City, Utah 84101 Attn: Mr. Sean Thal SThal@rideuta.com Re: Operations and Maintenance Report – First and Second Quarters, 2025 UTA Pallas Yard Terracon Project No. 61197043 Dear Mr. Thal: Terracon appreciates this opportunity to provide environmental engineering services to UTA. Should you have any questions or require additional information, please do not hesitate to contact our office. Sincerely, Stephen Maliszeski Amy Austin Project Manager Authorized Project Reviewer Amy Austin Responsive ■Resourceful ■Reliable ii TABLE OF CONTENTS PAGE NO. 1.0 INTRODUCTION .........................................................................................................1 2.0 QUARTERLY INSPECTION AND REPORTING ..................................................1 2.1 Institutional Control Monitoring ................................................................1 2.2 Access Control Evaluation .........................................................................1 2.3 Engineering Controls Inspection ..............................................................2 2.3.1 Inspection of HDPE Liner and Sound Berm .....................................2 2.3.2 Inspection of Ballast Cover .................................................................2 2.3.3 Inspection of Roadway Cover .............................................................2 2.3.4 Inspection of Storm Water Drainage System ....................................2 3.0 DEFICIENCIES AND CORRECTIVE ACTIONS ...................................................3 4.0 RECOMMENDATIONS ..............................................................................................3 5.0 REFERENCES ............................................................................................................3 ATTACHMENTS Figure 1: Site Features and Monitoring Well Locations Attachment 1: Site Inspection Forms Appendix 1: Compliance Status Report O&M Report – First and Second Quarters 2025 Pallas Yard ■ Murray, Utah June 20, 2025 ■ Terracon Project No. 61197043 Responsive ■Resourceful ■Reliable 1 1.0 INTRODUCTION This report has been prepared by Terracon Consultants, Inc. (Terracon), formerly IHI Environmental (IHI), for the Utah Transit Authority (UTA) to document operations and maintenance (O&M) issues and requirements following the completion of voluntary CERCLA Removal Action activities at the Pallas Yard (site) in Murray, Utah. Regulatory oversight for the site is provided by the U.S. Environmental Protection Agency (EPA), Region 8, and the Utah Department of Environmental Quality (UDEQ). At the completion of the Removal Action in 1999, a Site Monitoring Plan (SMP) (IHI, 1999) was developed to ensure the condition of the site remained protective of human health and the environment. O&M and environmental monitoring have been conducted quarterly since 1999. The EPA, UDEQ, and UTA (collectively known as the Parties) mutually agreed to update the 1999 SMP in response to more than ten years of O&M and environmental monitoring data. The revised SMP was finalized and approved by the Parties in September 2010 (IHI, 2010) to reflect current site conditions, institutional controls (ICs), access controls, O&M, environmental monitoring, and all of the associated tasks necessary for the continued protection of human health and the environment at the site. The purpose of the Operations and Maintenance Report is to present quarterly site inspection results to visually verify the effectiveness of the Access Control and O&M Programs. UTA conducted the First Quarter site inspections on March 9, 2025, and the Second Quarter site inspection on May 12, 2025. A copy of the Site Inspection Forms used to document the observations made during the site visit is included in Attachment 1. The results of semi-annual groundwater monitoring conducted at the site are included in a separate report located as the attached Appendix 1 (Compliance Status Report). 2.0 QUARTERLY INSPECTION AND REPORTING 2.1 Institutional Control Monitoring No failures or deficiencies associated with the IC Program, as it is outlined in the Environmental Covenant (EC) recorded on January 15, 2010, were noted. No evidence of surface water or groundwater use and no changes to land use (e.g., residential, recreational, or agricultural) were observed at the site. The site was observed to be in compliance with the SMP. As such, no recommendations for modifications to the IC Program are warranted at this time. 2.2 Access Control Evaluation The fences along the west and east sides of the site were observed to be in working condition; however, the west fence was documented to have three holes which need repaired. The fence was repaired by MOW by March 17, 2025. The access road was O&M Report – First and Second Quarters 2025 Pallas Yard ■ Murray, Utah June 20, 2025 ■ Terracon Project No. 61197043 Responsive ■Resourceful ■Reliable 2 reported to have no surface erosion that exceeded three inches in depth and was observed to be smooth. The gates were locked at the time of the site inspection, and site security perimeter signs were present at least every 1,000 feet along the west side of the site and warning signs were in place on both the north and south gates. 2.3 Engineering Controls Inspection A site visit was conducted to visually verify the integrity, effectiveness, and protectiveness of the engineering controls. The following sections detail the specific engineering controls inspected and a copy of the Site Inspection Forms is included in Appendix 1. 2.3.1 Inspection of HDPE Liner and Sound Berm The high-density polyethylene (HDPE) liner and sound berms were observed to be in good condition. No rills, gullies, or slumped or collapsed slopes greater than nine inches deep were observed in any of the sound berms. Animal burrows have continued to be present on the sound berms and UTA continues to manage animal activity on the berms through a professional pest control company. UTA reported that pest control was conducted during the first and second quarters of 2025 on January 23, February 14, March 11, April 11, May 12, and June 6, as listed on the Site Inspection Forms provided as Attachment 1 in this report. 2.3.2 Inspection of Ballast Cover The ballast cover was observed to be in good condition and appeared to be an average of eight inches thick, evenly distributed; no rills, gullies, potholes, or other areas of ballast cover disturbance were observed. 2.3.3 Inspection of Roadway Cover The roadway cover associated with the access roads on the east side of the yard, adjacent to the sound berms, and in the northwest portion of the site, beneath and around the 300 West Street flyover bridge, were observed to be in good condition. No areas of surface erosion greater than three inches deep (e.g., significant rills, gullies, or other areas of roadway cover disturbance that exceed 3 inches in depth) were observed. 2.3.4 Inspection of Storm Water Drainage System The V-drains were observed to be in good condition. No evidence of flooding from the underdrain manholes was observed and they appeared to be functioning properly. The storm water system appeared to be operational with no blockages or significant off-site drainage. The Best Management Practices (BMPs) instituted at the site for the storm water drainage system appear to be appropriate, and no BMPs were identified that could further reduce potential impacts to the storm water. O&M Report – First and Second Quarters 2025 Pallas Yard ■ Murray, Utah June 20, 2025 ■ Terracon Project No. 61197043 Responsive ■Resourceful ■Reliable 3 3.0 DEFICIENCIES AND CORRECTIVE ACTIONS No deficiencies regarding the effectiveness and protectiveness of the Access Control Programs were observed. 4.0 RECOMMENDATIONS Operations and maintenance of the IC, Access Control, and O&M Programs at the site continue to be effective and it is recommended that the O&M Inspections be continued. 5.0 REFERENCES IHI Environmental, 1999. Site Monitoring Plan for the Post-Removal Action Activities at the Pallas Yard. January 26, 1999. IHI Environmental, 2010. Post Removal Action Site Monitoring Plan for the Pallas Yard. September 16, 2010. FIGURE 1 Site Features and Monitoring Well Locations T: \ 1 1 P h a s e I I P r o j e c t s \ 9 9 E - 7 0 6 4 U T A - P a l l a s Y a r d Q t r l y M o n i t o r i n g \ - C A D D \ F i g 1 . d w g , F i g 1 ( 2 ) , 1 1 / 1 8 / 2 0 1 1 1 : 5 6 : 2 4 P M , m i k e b PROJECT No: SHEET: DRAWN BY: REVISED BY: Pa l l a s Y a r d S i t e , M u r r a y , U t a h Fi g u r e 1 : S i t e F e a t u r e s a n d M o n i t o r i n g W e l l L o c a t i o n s DATE: DATE: DATE: REVISED BY: o 0 50' 100' 99E-7064 1 MBradley 11-18-11 Fig1 1 South Section: 5900 S. to Appx. 5750 S. Plan View 1" = 100' 1" = 100'Plan View Center Section: Appx. 5750 S. to Anderson Ave. Fig1 2 Fig1 3 North Section: Appx. Anderson Ave. to 5300 S. Plan View 1" = 100' ATTACHMENT 1 Site Inspection Forms Site Inspection Form (Page 1 of 1) UTA - Pallas Yard HDPE Liner and Sound Berm Ballast Cover Roadway Cover Access Control Including Fences and Signs Stormwater Drainage System Inspected by: Sean Thal Sean Thal Sean Thal Sean Thal Sean Thal Date Inspected: 3/9/2025 3/9/2025 3/9/2025 3/9/2025 3/9/2025 Standard:No rills, gullies, slumped or collapsed slopes greater than 9 inches deep. Note if animal burrows were observed. Note general condition of vegetative cover. Average of 8 inches thick over areas where lead concentrations exceed 20,000 mg/kg (see Figure 1 of the Site Monitoring Plan). No surface erosion that exceeds 3 inches in depth. All gates locked. Fences in working condition. Warning signs every 1,000 feet on west side and on gates at north and south ends. V-drains: Water staying in diversions. No blockages; no significant off-site drainage. Underdrains: No flooding from manholes. Condition: (General description) Good. Vegetation is in good condition. Good Good - road is smooth. All gates locked. Fences in working condition. Warning signs every 1,000 feet on west side and on gates at north and south ends. Good Potential Issues: (Include location) Gophers and other animal activity could impact the liner. Gopher and other animal activity noted scattered throughout mounds. Sean Thal and/or Mark Taggart was present during the inspection with Huntsman Pest Control and trapped, smoked, and/or baited areas (2025.01.23, 2025.02.14, and 2025.03.11) None None The fence on the west side has three holes. None None None Repair holes in fence None Required Actions:Continue to monitor, trap, bait, and smoke rodent activity. None None Requested acess road and fence repairs. Fence holes were repaired by MOW by 03.17.2025. None Proposed Completion Date:None None None None None Contact Person:Sean Thal Sean Thal Sean Thal Sean Thal & Bryan Keck Sean Thal Date Completed:NA NA NA Completed by 03.17.2025 NA Site Monitoring Plan September 16, 2010 Site Inspection Form (Page 1 of 1) UTA - Pallas Yard HDPE Liner and Sound Berm Ballast Cover Roadway Cover Access Control Including Fences and Signs Stormwater Drainage System Inspected by: Sean Thal Sean Thal Sean Thal Sean Thal Sean Thal Date Inspected: 5/12/2025 5/12/2025 5/12/2025 5/12/2025 5/12/2025 Standard:No rills, gullies, slumped or collapsed slopes greater than 9 inches deep. Note if animal burrows were observed. Note general condition of vegetative cover. Average of 8 inches thick over areas where lead concentrations exceed 20,000 mg/kg (see Figure 1 of the Site Monitoring Plan). No surface erosion that exceeds 3 inches in depth. All gates locked. Fences in working condition. Warning signs every 1,000 feet on west side and on gates at north and south ends. V-drains: Water staying in diversions. No blockages; no significant off-site drainage. Underdrains: No flooding from manholes. Condition: (General description) Good. Vegetation is in good condition. Good Good - road is smooth. All gates locked. Fences in working condition. Warning signs every 1,000 feet on west side and on gates at north and south ends. Good Potential Issues: (Include location) Gophers and other animal activity could impact the liner. Gopher and other animal activity noted scattered throughout mounds. Sean Thal and/or Mark Taggart was present during the inspection with Huntsman Pest Control and trapped, smoked, and/or baited areas (2025.04.11, 2025.05.12, and 2025.06.06) None None None None None None None None Required Actions:Continue to monitor, trap, bait, and smoke rodent activity. None None None None Proposed Completion Date:None None None None None Contact Person:Sean Thal Sean Thal Sean Thal Sean Thal & Bryan Keck Sean Thal Date Completed:NA NA NA NA NA Site Monitoring Plan September 16, 2010 Responsive ■Resourceful ■Reliable 2 APPENDIX 1 Compliance Status Report Semi-Annual Compliance Status Report 1st Event; January to June 2025 Pallas Yard Post-Removal Action Pallas Yard 5300-5900 South 300 West Murray,Utah June 20, 2025 Terracon Project No. 61197043 Prepared for: Utah Transit Authority Salt Lake City, Utah Prepared by: Terracon Consultants, Inc. Midvale, Utah TABLE OF CONTENTS Responsive ■Resourceful ■Reliable i 1.0 INTRODUCTION ............................................................................................................. 1 2.0 METHODOLOGY ............................................................................................................ 2 2.1 Depth to Groundwater .......................................................................................... 2 2.2 Groundwater Sampling ........................................................................................ 2 3.0 RESULTS ....................................................................................................................... 2 3.1 Groundwater Depth and Flow Direction ............................................................... 2 3.2 Groundwater Monitoring Results .......................................................................... 3 4.0 QUALITY ASSURANCE/QUALITY CONTROL .............................................................. 3 4.1 Sampling Documentation ..................................................................................... 3 4.2 Groundwater Sampling and Analysis QA/QC ....................................................... 3 5.0 PROBLEMS/CORRECTIVE ACTIONS ........................................................................... 4 6.0 RECOMMENDATIONS ................................................................................................... 4 7.0 REFERENCES ................................................................................................................ 5 TABLES Table 1 Depth to Groundwater and Groundwater Elevation Table 2 Groundwater Analytical Results Table 3 Quality Assurance Summary FIGURES Figure 1 Groundwater Elevations Figures 2A-2C Arsenic/Lead Concentrations in Groundwater vs Time Figure 3A Monitoring Well Locations Figure 3B Groundwater Flow Direction Diagram APPENDICES Appendix 1: Groundwater Sample Quality Control Logs Appendix 2: Laboratory Analytical Report Compliance Status Report – 1st Semi-Annual Event 2025 Pallas Yard ■ Murray, Utah June 20, 2025 ■ Terracon Project No. 61197043 Responsive ■Resourceful ■Reliable 1 1.0 INTRODUCTION This report has been prepared by Terracon Consultants, Inc. (Terracon), for the Utah Transit Authority (UTA) to document groundwater monitoring data following the completion of the voluntary CERCLA Removal Action activities at the Pallas Yard (Site) in Murray, Utah. Regulatory oversight for the Site is provided by the U.S. Environmental Protection Agency (EPA), Region 8, and the Utah Department of Environmental Quality (UDEQ). At the completion of the Removal Action in 1999, a Site Monitoring Plan (SMP) (IHI, 1999) was developed to ensure the condition of the site remained protective of human health and the environment. Operations & Maintenance (O&M) and environmental monitoring have been conducted quarterly since 1999. The EPA, UDEQ, and UTA (collectively known as the Parties) mutually agreed to update the 1999 SMP in response to more than ten years of O&M and environmental monitoring data. The revised SMP was finalized and approved by the Parties in September 2010 (IHI, 2010) to reflect current site conditions, institutional controls (ICs), access controls, O&M, environmental monitoring, and all of the associated tasks necessary for the continued protection of human health and the environment at the Site. In July 2010, the Parties mutually agreed to cease storm water analytical monitoring. As such, storm water analytical monitoring is no longer part of the quarterly environmental monitoring program and has been removed from the report. After completion of a Five-Year Review of the Site (UDEQ; First Five-Year Review for Pallas Yard, Murray, Salt Lake County, Utah; September 29, 2009), it was determined that further investigation of elevated arsenic concentrations in groundwater observed at monitoring well PYMW-7B was required. IHI developed the MW-7B Groundwater Investigation Work Plan (IHI, 2010), which was approved by the Parties. The PYMW-7B Groundwater Investigation Report (IHI; November 14, 2012) documents the implementation of the Work Plan. As part of the Work Plan, IHI installed five new wells at the site in June 2011. Four of those wells (PYMW-21 through -24) were sampled during the investigation and were subsequently included in quarterly monitoring events between the Third Quarter of 2011 and the First Quarter of 2013. As the installation of PYMW-20 was to be used solely as a pumping well during the implementation of the Work Plan, the well was not included in the quarterly monitoring events. Following a review of the current and historical analytical data in March 2013, UTA petitioned EPA and UDEQ to reduce the number of wells to be sampled during the quarterly events. In a letter dated February 6, 2013, EPA and UDEQ agreed to limit the number of wells sampled during the quarterly groundwater monitoring events to PYMW-6A, PYMW-7B, and PYMW-9, located in the northwest portion of the site. Compliance Status Report – 1st Semi-Annual Event 2025 Pallas Yard ■ Murray, Utah June 20, 2025 ■ Terracon Project No. 61197043 Responsive ■Resourceful ■Reliable 2 In a letter submitted by Terracon and dated May 3, 2017, UTA petitioned EPA and UDEQ to reduce the groundwater sampling frequency from quarterly to semi-annual events. EPA and UDEQ accepted the request on June 15, 2017 via electronic mail. Based on the new sampling frequency, the first groundwater sampling event will be conducted from January to June each year and the second groundwater sampling event will be conducted from July to December each year. This Semi-Annual Compliance Status Report presents groundwater sample analytical results for January to June 2024. Current and historical depth-to-groundwater and groundwater elevations are shown in Table 1 and on Figure 1. Figures 2a through 2c display the arsenic and lead concentrations in groundwater over time in the currently sampled monitoring wells. Monitoring well locations are shown on Figure 3A. 2.0 METHODOLOGY 2.1 Depth to Groundwater Depth to groundwater and total well depth was measured using a decontaminated electronic water-level indicator prior to initiating sampling. Copies of the Groundwater Sample Quality Control Logs, which include the depth-to-groundwater measurements, are included in Appendix 1. 2.2 Groundwater Sampling Groundwater monitoring activities were completed following the Standard Operating Procedures (SOPs) included in Appendix 1 of the 2010 SMP. All samples were analyzed according to the methods, procedures, and Quality Assurance/Quality Control (QA/QC) guidelines specified in the 2010 SMP. 3.0 RESULTS 3.1 Groundwater Depth and Flow Direction Groundwater flow direction is calculated and mapped using three-dimensional software. The wells that were used for this evaluation are PYMW-6A, PYMW-7B, PYMW-9, PYMW-21, PYMW-22, PYMW-23, and PYMW-24. The depth-to-groundwater ranges seasonally between 6 and 18 feet below the ground surface. Groundwater flow direction was measured to the north and is consistent with the findings of previous groundwater monitoring events. Groundwater elevation data is included in Table 1. The groundwater flow direction for the current event is shown on Figure 3B. Compliance Status Report – 1st Semi-Annual Event 2025 Pallas Yard ■ Murray, Utah June 20, 2025 ■ Terracon Project No. 61197043 Responsive ■Resourceful ■Reliable 3 3.2 Groundwater Monitoring Results Terracon conducted this Semi-Annual Groundwater Monitoring event at the Pallas Yard on May 12, 2025. The analytical results were compared to the Performance Standards for dissolved arsenic (0.01 mg/L) and lead (0.015 mg/L) in groundwater, which represent the EPA’s current Maximum Contaminant Levels (MCLs) for arsenic and lead in drinking water. Dissolved arsenic was reported at a concentration exceeding the Performance Standard of 0.01 mg/L in one of the three wells sampled: PYMW-7B (2.25 mg/L). Dissolved arsenic was detected at a concentration above the laboratory reporting limit of 0.0005 mg/L, but below the Performance Standard, in PYMW 6A, PYMW-9 and its duplicate PYMW-12. Dissolved lead was not detected above the laboratory reporting limits in any of the three samples or duplicate collected. Groundwater analytical results are presented in Table 2. 4.0 QUALITY ASSURANCE/QUALITY CONTROL 4.1 Sampling Documentation Quality control for the sampling program was provided by the use of standardized sample collection and handling methods, as prescribed by Terracon’s SOPs, the documentation of pertinent field information, the maintenance of chain-of-custody records, and the collection of field QA/QC samples. The sampling and analyses were conducted according to the SMP, and the requisite documentation was completed. Copies of the Groundwater Sample Quality Control Logs are included in Appendix 1. A copy of the analytical laboratory report, including the chain-of-custody documentation, is included in Appendix 2. 4.2 Groundwater Sampling and Analysis QA/QC An equipment blank (labeled Equipment Blank) was collected using the same equipment and procedures as the monitoring well groundwater samples and was analyzed for dissolved lead and arsenic. The equipment blank was collected by fitting the peristaltic pump with new tubing and a new 0.45-micron filter, then pumping laboratory-supplied de-ionized water through the tubing and filter into a laboratory-supplied sampling container. Neither dissolved arsenic nor dissolved lead were reported above the analytical method reporting limits for the equipment blank, indicating the sampling equipment is not introducing lead or arsenic to the samples. A blind duplicate sample (labeled PYMW-12) was collected from monitoring well PYMW-9. To evaluate the precision of the analytical method, the analytical results of the sample and its duplicate are compared. In general, when sample results are greater than ten times the laboratory Compliance Status Report – 1st Semi-Annual Event 2025 Pallas Yard ■ Murray, Utah June 20, 2025 ■ Terracon Project No. 61197043 Responsive ■Resourceful ■Reliable 4 reporting limit, the precision is evaluated by calculating the relative percent difference (RPD) between the two samples using the following formula: RPD =𝑋1 −𝑋2  𝑋1 +𝑋2 2 𝑥100 Where X1 and X2 are the reported concentrations of the samples being evaluated. When the sample results are less than ten times the laboratory reporting limit, the method precision is generally considered within control when the difference between the two samples is less than the laboratory reporting limit. The reported concentrations of arsenic in both the sample and its duplicate were both less than ten times the laboratory reporting limit and therefore the RPD was not calculated. The analytical results were non-detected for the lead sample and it’s duplicate, the RPD was not calculated. The method is considered within control for the sample (PYMW-9) and its duplicate (PYMW-12). The Method Blank (MB) and Laboratory Control Sample (LCS) were within control limits. A matrix spike (MS) and its duplicate (MSD) pair was analyzed for both dissolved lead and arsenic, and Chemtech-Ford Laboratories (Chemtech) reported that the percent recoveries for both the MS and MSD were within the control limits established in the Quality Assurance Project Plan (QAPP). Table 3 summarizes Quality Assurance for the sampling at the site. 5.0 PROBLEMS/CORRECTIVE ACTIONS The concentration of dissolved arsenic in groundwater continues to exceed the Performance Standard in monitoring well PYMW-7B. Based on the groundwater sampling events conducted since 1999, it appears that the plume is stable and the elevated concentrations of arsenic remain limited to the immediate area around PYMW-7B. 6.0 RECOMMENDATIONS Due to the recurring detection of dissolved arsenic above the Performance Standard in monitoring well PYMW-7B, it is recommended that groundwater monitoring continue. Compliance Status Report – 1st Semi-Annual Event 2025 Pallas Yard ■ Murray, Utah June 20, 2025 ■ Terracon Project No. 61197043 Responsive ■Resourceful ■Reliable 5 7.0 REFERENCES IHI Environmental, 2011. The PYMW-7B Groundwater Investigation Report. November 14, 2012. IHI Environmental, 2010. MW-7B Groundwater Investigation Work Plan. December 2, 2010. IHI Environmental, 2010. Site Monitoring Plan for the Post-Removal Action Activities at the Pallas Yard. September 16, 2010. IHI Environmental, 1999a. Site Monitoring Plan for the Post-Removal Action Activities at the Pallas Yard. January 26, 1999 TABLES Table 1 Depth to Groundwater and Groundwater Elevation Utah Transit Authority - Pallas Yard (Page 1 of 6) 1999 2000 2001 2002 Location Top of Casing Elevation (ft) Depth-to- Groundwater and Groundwater Elevation (ft) 1 s t Q u a r t e r 2 n d Q u a r t e r 3 r d Q u a r t e r 4 t h Q u a r t e r 1 s t Q u a r t e r 2 n d Q u a r t e r 3 r d Q u a r t e r 4 t h Q u a r t e r 1 s t Q u a r t e r 2 n d Q u a r t e r 3 r d Q u a r t e r 4 t h Q u a r t e r 1 s t Q u a r t e r 2 n d Q u a r t e r 3 r d Q u a r t e r 4 t h Q u a r t e r Depth to GW (ft) 14.20 14.00 14.99 14.83 14.14 15.29 15.66 15.17 14.95 14.66 15.21 16.60 15.16 15.14 16.65 16.89 GW Elev. (ft) 4300.19 4300.39 4299.40 4299.56 4300.25 4299.10 4298.73 4299.22 4299.44 4299.73 4299.18 4297.79 4299.23 4299.25 4297.74 4297.50 Depth to GW (ft) GW Elev. (ft) Depth to GW (ft) 12.14 11.99 13.03 12.90 12.07 13.44 13.83 13.28 13.02 12.72 14.53 14.93 13.27 13.28 15.02 15.24 GW Elev. (ft) 4301.66 4301.81 4300.77 4300.90 4301.73 4300.36 4299.97 4300.52 4300.78 4301.08 4299.27 4298.87 4300.53 4300.52 4298.78 4298.56 Depth to GW (ft) GW Elev. (ft) Depth to GW (ft) GW Elev. (ft) Depth to GW (ft) 11.92 11.90 12.99 12.69 11.82 13.70 13.85 13.20 12.98 12.74 15.05 15.08 13.05 13.35 15.59 15.24 GW Elev. (ft) 4303.94 4303.96 4302.87 4303.17 4304.05 4302.16 4302.01 4302.66 4302.88 4303.12 4300.81 4300.78 4302.81 4302.51 4300.27 4300.62 Depth to GW (ft) 11.01 11.02 11.80 11.22 10.81 12.08 12.17 11.84 11.58 11.47 13.42 13.39 11.74 11.91 13.92 13.70 GW Elev. (ft) 4305.07 4305.06 4304.28 4304.86 4305.27 4304.00 4303.91 4304.24 4304.50 4304.61 4302.66 4302.69 4304.34 4304.17 4302.16 4302.38 Depth to GW (ft) 5.80 5.76 6.19 6.00 5.74 6.82 6.93 7.13 7.07 6.88 7.76 8.31 7.54 7.27 8.28 8.75 GW Elev. (ft) 4309.18 4309.22 4308.79 4308.98 4309.24 4308.16 4308.05 4307.85 4307.91 4308.10 4307.22 4306.67 4307.44 4307.71 4306.70 4306.23 Depth to GW (ft) 10.58 10.58 11.11 10.86 10.66 11.74 11.95 12.06 12.05 11.74 12.75 13.35 12.54 12.21 13.34 13.82 GW Elev. (ft) 4309.62 4309.62 4309.09 4309.34 4309.54 4308.46 4308.25 4308.14 4308.15 4308.46 4307.45 4306.85 4307.66 4307.99 4306.86 4306.38 Depth to GW (ft) GW Elev. (ft) Depth to GW (ft) GW Elev. (ft) Depth to GW (ft) GW Elev. (ft) Depth to GW (ft) GW Elev. (ft) nm - not measured. 4316.08 PYMW-8 4314.39 4313.83 4313.80 4314.27 4315.88 PYMW-6 PYMW-6A PYMW-7 PYMW-7A PYMW-7B 4315.86 4314.98 4320.20 PYMW-9 PYMW-10 PYMW-24 4315.90 PYMW-21 4315.50 PYMW-22 4314.67 PYMW-23 4315.07 PYMW-11 Table 1 Depth to Groundwater and Groundwater Elevation Utah Transit Authority - Pallas Yard (Page 2 of 6) Location Top of Casing Elevation (ft) Depth-to- Groundwater and Groundwater Elevation (ft) Depth to GW (ft) GW Elev. (ft) Depth to GW (ft) GW Elev. (ft) Depth to GW (ft) GW Elev. (ft) Depth to GW (ft) GW Elev. (ft) Depth to GW (ft) GW Elev. (ft) Depth to GW (ft) GW Elev. (ft) Depth to GW (ft) GW Elev. (ft) Depth to GW (ft) GW Elev. (ft) Depth to GW (ft) GW Elev. (ft) Depth to GW (ft) GW Elev. (ft) Depth to GW (ft) GW Elev. (ft) Depth to GW (ft) GW Elev. (ft) Depth to GW (ft) GW Elev. (ft) nm - not measured. 4316.08 PYMW-8 4314.39 4313.83 4313.80 4314.27 4315.88 PYMW-6 PYMW-6A PYMW-7 PYMW-7A PYMW-7B 4315.86 4314.98 4320.20 PYMW-9 PYMW-10 PYMW-24 4315.90 PYMW-21 4315.50 PYMW-22 4314.67 PYMW-23 4315.07 PYMW-11 2003 2004 2005 2006 1 s t Q u a r t e r 2 n d Q u a r t e r 3 r d Q u a r t e r 4 t h Q u a r t e r 1 s t Q u a r t e r 2 n d Q u a r t e r 3 r d Q u a r t e r 4 t h Q u a r t e r 1 s t Q u a r t e r 2 n d Q u a r t e r 3 r d Q u a r t e r 4 t h Q u a r t e r 1 s t Q u a r t e r 2 n d Q u a r t e r 3 r d Q u a r t e r 4 t h Q u a r t e r 16.17 15.04 16.89 17.84 14.90 15.30 17.37 4298.22 4299.35 4297.50 4296.55 4299.49 4299.09 4297.02 16.86 14.47 14.38 17.16 17.72 16.28 15.56 17.11 17.03 4296.97 4299.36 4299.45 4296.67 4296.11 4297.55 4298.27 4296.72 4296.80 14.41 13.05 15.28 16.24 12.99 13.37 15.77 4299.39 4300.75 4298.52 4297.56 4300.81 4300.43 4298.03 14.69 10.98 11.02 14.81 15.48 13.43 12.60 4299.58 4303.29 4303.25 4299.46 4298.79 4300.84 4301.67 16.53 16.31 4299.35 4299.57 14.39 13.05 15.77 15.92 12.98 13.41 16.02 13.40 10.42 9.43 14.18 14.51 12.28 11.99 4301.47 4302.81 4300.09 4299.94 4302.88 4302.45 4299.84 4302.46 4305.44 4306.43 4301.68 4301.35 4303.58 4303.87 12.71 11.58 14.23 14.60 11.40 12.02 14.51 12.13 9.03 10.55 13.18 13.41 11.40 11.26 13.11 12.53 4303.37 4304.50 4301.85 4301.48 4304.68 4304.06 4301.57 4303.95 4307.05 4305.53 4302.90 4302.67 4304.68 4304.82 4302.97 4303.55 8.61 8.15 8.99 9.40 8.05 7.76 9.11 8.82 7.75 6.52 8.45 8.98 8.40 7.67 8.38 8.50 4306.37 4306.83 4305.99 4305.58 4306.93 4307.22 4305.87 4306.16 4307.23 4308.46 4306.53 4306.00 4306.58 4307.31 4306.60 4306.48 13.75 13.30 14.05 14.53 13.32 12.74 14.20 13.94 12.94 11.55 13.42 14.07 13.55 12.69 13.42 13.59 4306.45 4306.90 4306.15 4305.67 4306.88 4307.46 4306.00 4306.26 4307.26 4308.65 4306.78 4306.13 4306.65 4307.51 4306.78 4306.61 Table 1 Depth to Groundwater and Groundwater Elevation Utah Transit Authority - Pallas Yard (Page 3 of 6) Location Top of Casing Elevation (ft) Depth-to- Groundwater and Groundwater Elevation (ft) Depth to GW (ft) GW Elev. (ft) Depth to GW (ft) GW Elev. (ft) Depth to GW (ft) GW Elev. (ft) Depth to GW (ft) GW Elev. (ft) Depth to GW (ft) GW Elev. (ft) Depth to GW (ft) GW Elev. (ft) Depth to GW (ft) GW Elev. (ft) Depth to GW (ft) GW Elev. (ft) Depth to GW (ft) GW Elev. (ft) Depth to GW (ft) GW Elev. (ft) Depth to GW (ft) GW Elev. (ft) Depth to GW (ft) GW Elev. (ft) Depth to GW (ft) GW Elev. (ft) nm - not measured. 4316.08 PYMW-8 4314.39 4313.83 4313.80 4314.27 4315.88 PYMW-6 PYMW-6A PYMW-7 PYMW-7A PYMW-7B 4315.86 4314.98 4320.20 PYMW-9 PYMW-10 PYMW-24 4315.90 PYMW-21 4315.50 PYMW-22 4314.67 PYMW-23 4315.07 PYMW-11 2007 2008 2009 2010 1 s t Q u a r t e r 2 n d Q u a r t e r 3 r d Q u a r t e r 4 t h Q u a r t e r 1 s t Q u a r t e r 2 n d Q u a r t e r 3 r d Q u a r t e r 4 t h Q u a r t e r 1 s t Q u a r t e r 2 n d Q u a r t e r 3 r d Q u a r t e r 4 t h Q u a r t e r 1 s t Q u a r t e r 2 n d Q u a r t e r 3 r d Q u a r t e r 4 t h Q u a r t e r 16.16 16.62 18.26 17.25 14.98 15.07 16.75 17.14 15.16 14.38 16.13 17.23 16.70 14.51 15.90 16.92 4297.67 4297.21 4295.57 4296.58 4298.85 4298.76 4297.08 4296.69 4298.67 4299.45 4297.70 4296.60 4297.13 4299.32 4297.93 4296.91 15.05 15.89 17.83 16.58 13.49 13.85 16.21 16.39 14.08 13.06 15.47 16.58 15.99 15.30 15.18 16.32 4300.83 4299.99 4298.05 4299.30 4302.39 4302.03 4299.67 4299.49 4301.80 4302.82 4300.41 4299.30 4299.89 4300.58 4300.70 4299.56 11.37 12.55 14.46 12.42 10.15 10.61 12.84 12.73 10.43 10.02 12.23 13.07 12.27 10.02 11.98 12.65 4304.71 4303.53 4301.62 4303.66 4305.93 4305.47 4303.24 4303.35 4305.65 4306.06 4303.85 4303.01 4303.81 4306.06 4304.10 4303.43 8.08 8.39 9.19 8.67 7.50 7.04 7.62 8.08 7.19 6.01 6.74 7.61 7.69 6.08 6.67 7.68 4306.90 4306.59 4305.79 4306.31 4307.48 4307.94 4307.36 4306.90 4307.79 4308.97 4308.24 4307.37 4307.29 4308.90 4308.31 4307.30 13.18 13.42 14.23 13.85 12.55 11.93 12.63 13.21 12.29 10.61 11.55 12.60 12.69 10.86 11.46 12.69 4307.02 4306.78 4305.97 4306.35 4307.65 4308.27 4307.57 4306.99 4307.91 4309.59 4308.65 4307.60 4307.51 4309.34 4308.74 4307.51 Table 1 Depth to Groundwater and Groundwater Elevation Utah Transit Authority - Pallas Yard (Page 4 of 6) Location Top of Casing Elevation (ft) Depth-to- Groundwater and Groundwater Elevation (ft) Depth to GW (ft) GW Elev. (ft) Depth to GW (ft) GW Elev. (ft) Depth to GW (ft) GW Elev. (ft) Depth to GW (ft) GW Elev. (ft) Depth to GW (ft) GW Elev. (ft) Depth to GW (ft) GW Elev. (ft) Depth to GW (ft) GW Elev. (ft) Depth to GW (ft) GW Elev. (ft) Depth to GW (ft) GW Elev. (ft) Depth to GW (ft) GW Elev. (ft) Depth to GW (ft) GW Elev. (ft) Depth to GW (ft) GW Elev. (ft) Depth to GW (ft) GW Elev. (ft) nm - not measured. 4316.08 PYMW-8 4314.39 4313.83 4313.80 4314.27 4315.88 PYMW-6 PYMW-6A PYMW-7 PYMW-7A PYMW-7B 4315.86 4314.98 4320.20 PYMW-9 PYMW-10 PYMW-24 4315.90 PYMW-21 4315.50 PYMW-22 4314.67 PYMW-23 4315.07 PYMW-11 2011 2012 2013 2014 1 s t Q u a r t e r 2 n d Q u a r t e r 3 r d Q u a r t e r 4 t h Q u a r t e r 1 s t Q u a r t e r 2 n d Q u a r t e r 3 r d Q u a r t e r 4 t h Q u a r t e r 1 s t Q u a r t e r 2 n d Q u a r t e r 3 r d Q u a r t e r 4 t h Q u a r t e r 1 s t Q u a r t e r 2 n d Q u a r t e r 3 r d Q u a r t e r 4 t h Q u a r t e r 14.16 12.83 14.77 15.69 15.15 14.58 16.77 16.35 15.65 14.62 16.36 16.95 14.75 14.35 15.55 15.99 4299.67 4301.00 4299.06 4298.14 4298.68 4299.25 4297.06 4297.48 4298.18 4299.21 4297.47 4296.88 4299.08 4299.48 4298.28 4297.84 12.83 11.45 13.88 13.65 14.11 13.64 16.40 15.71 14.69 13.68 15.97 16.39 13.68 13.14 14.88 15.21 4303.05 4304.43 4302.00 4302.23 4301.77 4302.24 4299.48 4300.17 4301.19 4302.20 4299.91 4299.49 4302.20 4302.74 4301.00 4300.67 9.62 8.94 10.82 11.35 10.65 10.65 13.44 12.12 11.19 10.29 12.88 13.21 10.37 10.28 11.80 11.90 4306.46 4307.14 4305.26 4304.73 4305.43 4305.43 4302.64 4303.96 4304.89 4305.79 4303.20 4302.87 4305.71 4305.80 4304.28 4304.18 6.30 6.04 5.96 6.77 6.63 6.32 7.87 7.95 7.74 4308.68 4308.94 4309.02 4308.21 4308.35 4308.66 4307.11 4307.03 4307.24 11.08 10.42 10.65 11.58 11.48 11.04 12.89 12.95 12.82 4309.12 4309.78 4309.55 4308.62 4308.72 4309.16 4307.31 4307.25 4307.38 13.24 13.97 13.45 13.06 15.81 15.04 13.99 nm 15.36 15.78 13.05 12.56 14.23 14.56 4302.26 4301.53 4302.05 4302.44 4299.69 4300.46 4301.51 nm 4300.14 4299.72 4302.45 4302.94 4301.27 4300.94 12.63 13.33 12.82 12.40 15.21 14.45 13.33 nm 14.78 15.13 12.39 11.86 13.65 13.97 4302.04 4301.34 4301.85 4302.27 4299.46 4300.22 4301.34 nm 4299.89 4299.54 4302.28 4302.81 4301.02 4300.70 13.41 14.25 13.68 13.10 15.92 15.23 14.23 nm 15.49 15.88 12.87 12.16 14.42 14.77 4301.66 4300.82 4301.39 4301.97 4299.15 4299.84 4300.84 nm 4299.58 4299.19 4302.20 4302.91 4300.65 4300.30 13.93 14.71 14.17 13.69 16.46 15.75 14.75 nm 16.02 16.44 13.71 13.21 14.92 15.27 4301.97 4301.19 4301.73 4302.21 4299.44 4300.15 4301.15 nm 4299.88 4299.46 4302.19 4302.69 4300.98 4300.63 Table 1 Depth to Groundwater and Groundwater Elevation Utah Transit Authority - Pallas Yard (Page 5 of 6) Location Top of Casing Elevation (ft) Depth-to- Groundwater and Groundwater Elevation (ft) Depth to GW (ft) GW Elev. (ft) Depth to GW (ft) GW Elev. (ft) Depth to GW (ft) GW Elev. (ft) Depth to GW (ft) GW Elev. (ft) Depth to GW (ft) GW Elev. (ft) Depth to GW (ft) GW Elev. (ft) Depth to GW (ft) GW Elev. (ft) Depth to GW (ft) GW Elev. (ft) Depth to GW (ft) GW Elev. (ft) Depth to GW (ft) GW Elev. (ft) Depth to GW (ft) GW Elev. (ft) Depth to GW (ft) GW Elev. (ft) Depth to GW (ft) GW Elev. (ft) nm - not measured. 4316.08 PYMW-8 4314.39 4313.83 4313.80 4314.27 4315.88 PYMW-6 PYMW-6A PYMW-7 PYMW-7A PYMW-7B 4315.86 4314.98 4320.20 PYMW-9 PYMW-10 PYMW-24 4315.90 PYMW-21 4315.50 PYMW-22 4314.67 PYMW-23 4315.07 PYMW-11 2015 2016 2017 1 s t Q u a r t e r 2 n d Q u a r t e r 3 r d Q u a r t e r 4 t h Q u a r t e r 1 s t Q u a r t e r 2 n d Q u a r t e r 3 r d Q u a r t e r 4 t h Q u a r t e r 1 s t Q u a r t e r 2 n d Q u a r t e r Se m i - A n n u a l E v e n t (J u l y - D e c e m b e r ) Se m i - A n n u a l E v e n t (J a n u a r y - J u n e ) Se m i - A n n u a l E v e n t (J u l y - D e c e m b e r ) Se m i - A n n u a l E v e n t (J a n u a r y - J u n e ) Se m i - A n n u a l E v e n t (J u l y - D e c e m b e r ) 15.55 14.51 16.69 16.61 14.61 14.25 16.65 15.35 14.00 14.04 15.00 14.73 16.21 12.53 15.97 4298.28 4299.32 4297.14 4297.22 4299.22 4299.58 4297.18 4298.48 4299.83 4299.79 4298.83 4299.10 4297.62 4301.30 4297.86 14.50 13.49 16.40 16.10 13.52 13.20 16.29 14.41 12.93 13.10 14.05 13.90 15.62 11.82 15.39 4301.38 4302.39 4299.48 4299.78 4302.36 4302.68 4299.59 4301.47 4302.95 4302.78 4301.83 4301.98 4300.26 4304.06 4300.49 11.38 10.44 13.11 12.90 10.21 10.50 12.78 11.13 10.02 10.31 9.60 11.03 12.04 8.64 12.22 4304.70 4305.64 4302.97 4303.18 4305.87 4305.58 4303.30 4304.95 4306.06 4305.77 4306.48 4305.05 4304.04 4307.44 4303.86 13.85 12.91 15.27 15.48 12.94 12.65 15.66 13.76 12.38 12.58 13.39 13.28 14.99 11.30 14.77 4301.65 4302.59 4300.23 4300.02 4302.56 4302.85 4299.84 4301.74 4303.12 4302.92 4302.11 4302.22 4300.51 4304.20 4300.73 13.18 12.22 15.58 14.87 12.24 11.95 15.06 13.11 11.68 11.86 13.85 12.65 14.40 10.48 14.19 4301.49 4302.45 4299.09 4299.80 4302.43 4302.72 4299.61 4301.56 4302.99 4302.81 4300.82 4302.02 4300.27 4304.19 4300.48 14.08 12.59 15.34 15.61 12.36 12.28 15.80 13.93 11.82 12.10 13.68 13.41 15.28 10.72 DRY 4300.99 4302.48 4299.73 4299.46 4302.71 4302.79 4299.27 4301.14 4303.25 4302.97 4301.39 4301.66 4299.79 4304.35 -- 14.58 13.55 16.44 16.15 13.59 13.28 16.33 14.47 13.00 13.14 14.09 13.91 15.67 11.89 15.43 4301.32 4302.35 4299.46 4299.75 4302.31 4302.62 4299.57 4301.43 4302.90 4302.76 4301.81 4301.99 4300.23 4304.01 4300.47 20192018 Table 1 Depth to Groundwater and Groundwater Elevation Utah Transit Authority - Pallas Yard (Page 6 of 6) Location Top of Casing Elevation (ft) Depth-to- Groundwater and Groundwater Elevation (ft) Depth to GW (ft) GW Elev. (ft) Depth to GW (ft) GW Elev. (ft) Depth to GW (ft) GW Elev. (ft) Depth to GW (ft) GW Elev. (ft) Depth to GW (ft) GW Elev. (ft) Depth to GW (ft) GW Elev. (ft) Depth to GW (ft) GW Elev. (ft) Depth to GW (ft) GW Elev. (ft) Depth to GW (ft) GW Elev. (ft) Depth to GW (ft) GW Elev. (ft) Depth to GW (ft) GW Elev. (ft) Depth to GW (ft) GW Elev. (ft) Depth to GW (ft) GW Elev. (ft) nm - not measured. 4316.08 PYMW-8 4314.39 4313.83 4313.80 4314.27 4315.88 PYMW-6 PYMW-6A PYMW-7 PYMW-7A PYMW-7B 4315.86 4314.98 4320.20 PYMW-9 PYMW-10 PYMW-24 4315.90 PYMW-21 4315.50 PYMW-22 4314.67 PYMW-23 4315.07 PYMW-11 2025 Se m i - A n n u a l E v e n t (J a n u a r y - J u n e ) Se m i - A n n u a l E v e n t (J u l y - D e c e m b e r ) Se m i - A n n u a l E v e n t (J a n u a r y - J u n e ) Se m i - A n n u a l E v e n t (J u l y - D e c e m b e r ) Se m i - A n n u a l E v e n t (J a n u a r y - J u n e ) Se m i - A n n u a l E v e n t (J u l y - D e c e m b e r ) Se m i - A n n u a l E v e n t (J a n u a r y - J u n e ) Se m i - A n n u a l E v e n t (J u l y - D e c e m b e r ) Se m i - A n n u a l E v e n t (J a n u a r y - J u n e ) Se m i - A n n u a l E v e n t (J u l y - D e c e m b e r ) Se m i - A n n u a l E v e n t (J a n u a r y - J u n e ) 15.50 16.96 15.64 14.69 14.41 16.18 13.92 15.43 13.20 15.71 14.48 4298.33 4296.87 4298.19 4299.14 4299.42 4297.65 4299.91 4298.40 4300.63 4298.12 4299.35 14.18 16.55 14.74 13.69 13.45 15.34 12.93 14.35 12.48 14.79 13.57 4301.70 4299.33 4301.14 4302.19 4302.43 4300.54 4302.95 4301.53 4303.40 4301.09 4302.31 11.17 13.31 11.68 10.71 11.64 11.96 10.10 11.44 9.09 11.59 10.69 4304.91 4302.77 4304.40 4305.37 4304.44 4304.12 4305.98 4304.64 4306.99 4304.49 4305.39 13.54 15.92 14.04 13.09 12.91 14.64 12.39 13.71 12.00 14.11 13.00 4301.96 4299.58 4301.46 4302.41 4302.59 4300.86 4303.11 4301.79 4303.50 4301.39 4302.50 12.17 15.32 13.43 12.40 12.23 14.00 11.96 13.02 11.24 13.45 12.34 4302.50 4299.35 4301.24 4302.27 4302.44 4300.67 4302.71 4301.65 4303.43 4301.22 4302.33 13.71 16.04 14.35 12.68 12.58 14.90 11.83 13.87 11.49 14.34 12.79 4301.36 4299.03 4300.72 4302.39 4302.49 4300.17 4303.24 4301.20 4303.58 4300.73 4302.28 14.23 16.58 14.80 13.73 13.51 15.39 12.97 14.41 12.51 14.83 13.61 4301.67 4299.32 4301.10 4302.17 4302.39 4300.51 4302.93 4301.49 4303.39 4301.07 4302.29 202420232020 2021 2022 Table 2 Groundwater Analytical Results Utah Transit Authority - Pallas Yard (Page 1 of 6) 1999 2000 2001 2002 Location Analyte Methoda MCL (mg/L) 1 s t Q u a r t e r 2 n d Q u a r t e r 3 r d Q u a r t e r 4 t h Q u a r t e r 1 s t Q u a r t e r 2 n d Q u a r t e r 3 r d Q u a r t e r 4 t h Q u a r t e r 1 s t Q u a r t e r 2 n d Q u a r t e r 3 r d Q u a r t e r 4 t h Q u a r t e r 1 s t Q u a r t e r 2 n d Q u a r t e r 3 r d Q u a r t e r 4 t h Q u a r t e r Arsenic EPA 200.9 0.010 < 0.005 < 0.005 < 0.005 < 0.005 < 0.005 < 0.0052 < 0.005 < 0.005 < 0.005 < 0.005 < 0.005 < 0.005 < 0.005 < 0.005 < 0.005 < 0.005 Lead EPA 200.9 0.015 < 0.005 < 0.005 < 0.005 < 0.005 < 0.005 < 0.0052 < 0.005 < 0.005 < 0.005 < 0.005 < 0.005 < 0.005 < 0.005 < 0.005 < 0.005 < 0.005 Arsenic EPA 200.9 0.010 Lead EPA 200.9 0.015 Arsenic EPA 200.9 0.010 < 0.005 < 0.005 < 0.005 < 0.005 < 0.005 < 0.0052 < 0.005 < 0.005 < 0.005 < 0.005 < 0.005 < 0.005 < 0.005 < 0.005 < 0.005 < 0.005 Lead EPA 200.9 0.015 < 0.005 < 0.005 < 0.005 < 0.005 < 0.005 < 0.0052 < 0.005 < 0.005 < 0.005 < 0.005 < 0.005 < 0.005 < 0.005 < 0.005 < 0.005 < 0.005 Arsenic EPA 200.9 0.010 Lead EPA 200.9 0.015 Arsenic EPA 200.9 0.010 Lead EPA 200.9 0.015 Arsenic EPA 200.9 0.010 < 0.005 < 0.005 < 0.005 < 0.005 < 0.005 < 0.0052 < 0.005 < 0.005 < 0.005 < 0.005 < 0.005 < 0.005 < 0.005 < 0.005 < 0.005 < 0.005 Lead EPA 200.9 0.015 < 0.005 < 0.005 < 0.005 < 0.005 < 0.005 < 0.0052 < 0.005 < 0.005 < 0.005 < 0.005 < 0.005 < 0.005 < 0.005 < 0.005 < 0.005 < 0.005 Arsenic EPA 200.9 0.010 < 0.005 < 0.005 < 0.005 < 0.005 < 0.005 < 0.0052 < 0.005 < 0.005 < 0.005 < 0.005 < 0.005 < 0.005 < 0.005 < 0.005 < 0.005 < 0.005 Lead EPA 200.9 0.015 < 0.005 < 0.005 < 0.005 < 0.005 < 0.005 < 0.0052 < 0.005 < 0.005 < 0.005 < 0.005 < 0.005 < 0.005 < 0.005 < 0.005 < 0.005 < 0.005 Arsenic EPA 200.9 0.010 0.007 < 0.005 < 0.005 < 0.005 < 0.005 < 0.0052 < 0.005 < 0.005 < 0.005 < 0.005 < 0.005 < 0.005 < 0.005 < 0.005 0.0053 0.0081 Lead EPA 200.9 0.015 0.009 < 0.005 < 0.005 < 0.005 < 0.005 < 0.0052 < 0.005 < 0.005 < 0.005 < 0.005 < 0.005 < 0.005 < 0.005 < 0.005 < 0.005 < 0.005 Arsenic EPA 200.9 0.010 < 0.005 < 0.005 < 0.005 < 0.005 < 0.005 < 0.0052 < 0.005 < 0.005 < 0.005 < 0.005 < 0.005 < 0.005 < 0.005 < 0.005 < 0.005 < 0.005 Lead EPA 200.9 0.015 < 0.005 < 0.005 < 0.005 < 0.005 < 0.005 < 0.0052 < 0.005 < 0.005 < 0.005 < 0.005 < 0.005 < 0.005 < 0.005 < 0.005 < 0.005 < 0.005 Arsenic EPA 200.9 0.010 Lead EPA 200.9 0.015 Arsenic EPA 200.9 0.010 Lead EPA 200.9 0.015 Arsenic EPA 200.9 0.010 Lead EPA 200.9 0.015 Arsenic EPA 200.9 0.010 Lead EPA 200.9 0.015 Arsenic EPA 200.9 0.010 < 0.005 < 0.005 < 0.005 < 0.005 < 0.005 < 0.0052 < 0.005 < 0.005 < 0.005 < 0.005 < 0.005 0.0051 < 0.005 < 0.005 < 0.005 < 0.005 Lead EPA 200.9 0.015 < 0.005 < 0.005 < 0.005 0.007 < 0.005 < 0.0052 < 0.005 < 0.005 < 0.005 < 0.005 < 0.005 < 0.005 < 0.005 < 0.005 < 0.005 < 0.005 * PYMW-12/-13/-124 is a blind duplicate of:PYMW-7 PYMW-9 PYMW-8 PYMW-6 PYMW-10 PYMW-9 PYMW-11 PYMW-8 PYMW-7 PYMW-8 PYMW-9 PYMW-10 PYMW-10 PYMW-6 PYMW-7 PYMW-7 a - Method changed to EPA 200.8 in 4th Qtr 2007. PYMW-6 PYMW-7 PYMW-7B PYMW-6A PYMW-7A PYMW-8 PYMW-9 PYMW-10 PYMW-11 PYMW-12/ PYMW-13/ PYMW-124 PYMW-21 PYMW-22 PYMW-23 PYMW-24 Table 2 Groundwater Analytical Results Utah Transit Authority - Pallas Yard (Page 2 of 6) Location Analyte Methoda MCL (mg/L) Arsenic EPA 200.9 0.010 Lead EPA 200.9 0.015 Arsenic EPA 200.9 0.010 Lead EPA 200.9 0.015 Arsenic EPA 200.9 0.010 Lead EPA 200.9 0.015 Arsenic EPA 200.9 0.010 Lead EPA 200.9 0.015 Arsenic EPA 200.9 0.010 Lead EPA 200.9 0.015 Arsenic EPA 200.9 0.010 Lead EPA 200.9 0.015 Arsenic EPA 200.9 0.010 Lead EPA 200.9 0.015 Arsenic EPA 200.9 0.010 Lead EPA 200.9 0.015 Arsenic EPA 200.9 0.010 Lead EPA 200.9 0.015 Arsenic EPA 200.9 0.010 Lead EPA 200.9 0.015 Arsenic EPA 200.9 0.010 Lead EPA 200.9 0.015 Arsenic EPA 200.9 0.010 Lead EPA 200.9 0.015 Arsenic EPA 200.9 0.010 Lead EPA 200.9 0.015 Arsenic EPA 200.9 0.010 Lead EPA 200.9 0.015 * PYMW-12/-13/-124 is a blind duplicate of: a - Method changed to EPA 200.8 in 4th Qtr 2007. PYMW-6 PYMW-7 PYMW-7B PYMW-6A PYMW-7A PYMW-8 PYMW-9 PYMW-10 PYMW-11 PYMW-12/ PYMW-13/ PYMW-124 PYMW-21 PYMW-22 PYMW-23 PYMW-24 2003 2004 2005 2006 1 s t Q u a r t e r 2 n d Q u a r t e r 3 r d Q u a r t e r 4 t h Q u a r t e r 1 s t Q u a r t e r 2 n d Q u a r t e r 3 r d Q u a r t e r 4 t h Q u a r t e r 1 s t Q u a r t e r 2 n d Q u a r t e r 3 r d Q u a r t e r 4 t h Q u a r t e r 1 s t Q u a r t e r 2 n d Q u a r t e r 3 r d Q u a r t e r 4 t h Q u a r t e r < 0.005 < 0.005 < 0.005 < 0.005 < 0.005 < 0.005 < 0.005 < 0.005 < 0.005 < 0.005 < 0.005 < 0.005 < 0.005 < 0.005 < 0.005 < 0.005 < 0.005 < 0.005 < 0.005 < 0.005 < 0.005 < 0.005 < 0.005 0.0053 < 0.005 < 0.005 < 0.005 < 0.005 < 0.005 < 0.005 < 0.005 < 0.005 < 0.005 < 0.005 < 0.005 < 0.005 < 0.005 < 0.005 < 0.005 < 0.005 < 0.005 < 0.005 < 0.005 < 0.005 < 0.005 < 0.005 0.04 0.015 0.035 0.12 0.3 0.38 0.26 < 0.005 < 0.005 < 0.005 < 0.005 < 0.005 < 0.005 < 0.005 0.93 1.4 < 0.005 < 0.005 < 0.005 < 0.005 < 0.005 < 0.005 < 0.005 < 0.005 < 0.005 < 0.005 < 0.005 < 0.005 0.0054 < 0.005 < 0.005 0.0054 < 0.005 < 0.005 < 0.005 < 0.005 < 0.005 < 0.005 < 0.005 < 0.005 < 0.005 < 0.005 < 0.005 < 0.005 < 0.005 < 0.005 < 0.005 < 0.005 < 0.005 < 0.005 < 0.005 < 0.005 < 0.005 < 0.005 < 0.005 < 0.005 < 0.005 < 0.005 < 0.005 < 0.005 < 0.005 < 0.005 < 0.005 < 0.005 < 0.005 < 0.005 < 0.005 < 0.005 < 0.005 < 0.005 < 0.005 < 0.005 < 0.005 < 0.005 < 0.005 < 0.005 < 0.005 < 0.005 0.0084 0.0064 0.0068 < 0.005 0.0078 0.011 0.0077 0.008 0.0054 < 0.005 0.0096 0.0073 < 0.005 < 0.005 0.0066 0.0053 < 0.005 < 0.005 < 0.005 < 0.005 < 0.005 < 0.005 < 0.005 < 0.005 < 0.005 < 0.005 < 0.005 < 0.005 < 0.005 < 0.005 < 0.005 < 0.005 < 0.005 < 0.005 < 0.005 < 0.005 < 0.005 < 0.005 < 0.005 < 0.005 < 0.005 < 0.005 < 0.005 < 0.005 < 0.005 < 0.005 < 0.005 < 0.005 < 0.005 < 0.005 < 0.005 < 0.005 < 0.005 < 0.005 < 0.005 < 0.005 < 0.005 < 0.005 < 0.005 < 0.005 < 0.005 < 0.005 < 0.005 < 0.005 < 0.005 < 0.005 0.0068 < 0.005 < 0.005 < 0.005 < 0.005 < 0.005 < 0.005 < 0.005 0.0055 < 0.005 < 0.005 0.26 < 0.005 < 0.005 < 0.005 < 0.005 < 0.005 < 0.005 < 0.005 < 0.005 < 0.005 < 0.005 < 0.005 < 0.005 < 0.005 < 0.005 < 0.005 < 0.005 < 0.005 < 0.005 PYMW-8 PYMW-9 PYMW-10 PYMW-6 PYMW-7 PYMW-8 PYMW-11 PYMW-11 PYMW-8 PYMW-9 PYMW-6A PYMW-11 PYMW-6A PYMW-7A PYMW-11 PYMW-9 Table 2 Groundwater Analytical Results Utah Transit Authority - Pallas Yard (Page 3 of 6) Location Analyte Methoda MCL (mg/L) Arsenic EPA 200.9 0.010 Lead EPA 200.9 0.015 Arsenic EPA 200.9 0.010 Lead EPA 200.9 0.015 Arsenic EPA 200.9 0.010 Lead EPA 200.9 0.015 Arsenic EPA 200.9 0.010 Lead EPA 200.9 0.015 Arsenic EPA 200.9 0.010 Lead EPA 200.9 0.015 Arsenic EPA 200.9 0.010 Lead EPA 200.9 0.015 Arsenic EPA 200.9 0.010 Lead EPA 200.9 0.015 Arsenic EPA 200.9 0.010 Lead EPA 200.9 0.015 Arsenic EPA 200.9 0.010 Lead EPA 200.9 0.015 Arsenic EPA 200.9 0.010 Lead EPA 200.9 0.015 Arsenic EPA 200.9 0.010 Lead EPA 200.9 0.015 Arsenic EPA 200.9 0.010 Lead EPA 200.9 0.015 Arsenic EPA 200.9 0.010 Lead EPA 200.9 0.015 Arsenic EPA 200.9 0.010 Lead EPA 200.9 0.015 * PYMW-12/-13/-124 is a blind duplicate of: a - Method changed to EPA 200.8 in 4th Qtr 2007. PYMW-6 PYMW-7 PYMW-7B PYMW-6A PYMW-7A PYMW-8 PYMW-9 PYMW-10 PYMW-11 PYMW-12/ PYMW-13/ PYMW-124 PYMW-21 PYMW-22 PYMW-23 PYMW-24 2007 2008 2009 2010 1 s t Q u a r t e r 2 n d Q u a r t e r 3 r d Q u a r t e r 4 t h Q u a r t e r 1 s t Q u a r t e r 2 n d Q u a r t e r 3 r d Q u a r t e r 4 t h Q u a r t e r 1 s t Q u a r t e r 2n d Q u a r t e r 3r d Q u a r t e r 4t h Q u a r t e r 1 s t Q u a r t e r 2n d Q u a r t e r 3r d Q u a r t e r 4t h Q u a r t e r < 0.005 < 0.005 < 0.005 0.003 0.0015 0.0014 0.0013 0.0016 0.002 0.0021 0.0014 0.0012 0.0015 0.0035 0.00173 0.00175 < 0.005 < 0.005 < 0.005 0.0001 0.0002 < 0.0004 < 0.0005 < 0.0005 < 0.0004 < 0.0004 < 0.0004 < 0.0004 < 0.0004 < 0.0004 < 0.0004 < 0.0004 1.4 1.7 2.3 2.4 1.2 1.4 2.3 2.1 2.2 1.6 2.2 2.5 2.6 1.6 2.3 2.54 < 0.005 < 0.005 < 0.005 0.0001 < 0.0001 < 0.0004 < 0.0005 < 0.0005 < 0.0004 < 0.0004 < 0.0004 < 0.0004 < 0.0004 < 0.0004 < 0.0004 < 0.0004 < 0.005 < 0.005 < 0.005 0.0031 0.0024 0.0026 0.0029 0.0028 0.0022 0.0029 0.0031 0.0035 0.0028 0.0026 0.00359 0.00394 < 0.005 < 0.005 < 0.005 0.00032 < 0.0001 < 0.0004 < 0.0005 < 0.0005 < 0.0004 < 0.0004 < 0.0004 < 0.0004 < 0.0004 < 0.0004 < 0.0004 < 0.0004 < 0.005 < 0.005 0.0062 0.0064 0.005 0.0038 0.0054 0.0049 0.0045 0.0018 0.0027 0.0015 0.0025 0.0015 0.00265 0.00195 < 0.005 < 0.005 < 0.005 0.00021 < 0.0001 < 0.0004 0.0002 0.00042 0.00047 < 0.0004 < 0.0004 < 0.0004 < 0.0004 < 0.0004 < 0.0004 0.00082 < 0.005 < 0.005 < 0.005 0.0022 0.0024 0.0022 0.0022 0.0022 0.0023 0.0024 0.0026 0.0029 0.0025 0.0026 0.00281 0.00324 < 0.005 < 0.005 < 0.005 0.00014 < 0.0001 < 0.0004 < 0.0005 < 0.0005 < 0.0004 < 0.0004 < 0.0004 < 0.0004 < 0.0004 < 0.0004 < 0.0004 < 0.0004 < 0.005 < 0.005 2.3 2.3 0.002 1.4 0.0031 0.0031 0.0022 0.0026 0.0024 2.5 0.0027 1.7 2.29 2.6 < 0.005 < 0.005 < 0.005 0.00011 < 0.0001 < 0.0004 < 0.0005 < 0.0005 < 0.0004 < 0.0004 < 0.0004 < 0.0004 < 0.0004 < 0.0004 < 0.0004 < 0.0004 PYMW-10 PYMW-9 PYMW-7B PYMW-7B PYMW-9 PYMW-7B PYMW-9 PYMW-9 PYMW-9 PYMW-9 PYMW-11 PYMW-7B PYMW-11 PYMW-7B PYMW-7B PYMB-7B Table 2 Groundwater Analytical Results Utah Transit Authority - Pallas Yard (Page 4 of 6) Location Analyte Methoda MCL (mg/L) Arsenic EPA 200.9 0.010 Lead EPA 200.9 0.015 Arsenic EPA 200.9 0.010 Lead EPA 200.9 0.015 Arsenic EPA 200.9 0.010 Lead EPA 200.9 0.015 Arsenic EPA 200.9 0.010 Lead EPA 200.9 0.015 Arsenic EPA 200.9 0.010 Lead EPA 200.9 0.015 Arsenic EPA 200.9 0.010 Lead EPA 200.9 0.015 Arsenic EPA 200.9 0.010 Lead EPA 200.9 0.015 Arsenic EPA 200.9 0.010 Lead EPA 200.9 0.015 Arsenic EPA 200.9 0.010 Lead EPA 200.9 0.015 Arsenic EPA 200.9 0.010 Lead EPA 200.9 0.015 Arsenic EPA 200.9 0.010 Lead EPA 200.9 0.015 Arsenic EPA 200.9 0.010 Lead EPA 200.9 0.015 Arsenic EPA 200.9 0.010 Lead EPA 200.9 0.015 Arsenic EPA 200.9 0.010 Lead EPA 200.9 0.015 * PYMW-12/-13/-124 is a blind duplicate of: a - Method changed to EPA 200.8 in 4th Qtr 2007. PYMW-6 PYMW-7 PYMW-7B PYMW-6A PYMW-7A PYMW-8 PYMW-9 PYMW-10 PYMW-11 PYMW-12/ PYMW-13/ PYMW-124 PYMW-21 PYMW-22 PYMW-23 PYMW-24 2011 2012 2013 2014 1 s t Q u a r t e r 2n d Q u a r t e r 3r d Q u a r t e r 4t h Q u a r t e r 1 s t Q u a r t e r 2n d Q u a r t e r 3r d Q u a r t e r 4t h Q u a r t e r 1 s t Q u a r t e r 2n d Q u a r t e r 3r d Q u a r t e r 4t h Q u a r t e r 1 s t Q u a r t e r 2n d Q u a r t e r 3r d Q u a r t e r 4t h Q u a r t e r 0.00157 0.00241 0.00175 0.00173 0.00171 0.00219 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002 0.0010 < 0.002 < 0.0004 < 0.0004 0.00111 0.000716 0.0004 0.0004 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002 < 0.0005 < 0.002 1.63 1.62 2.62 2.51 2.65 2.37 2.91 2.63 2.69 2.97 2.79 2.89 2.60 1.91 2.44 2.53 < 0.0004 < 0.0004 < 0.0004 < 0.0004 < 0.0004 < 0.0004 < 0.002 0.00255 0.0155 1 < 0.002 < 0.002 < 0.002 < 0.002 < 0.0005 < 0.002 0.00265 0.00285 0.00282 0.00315 0.00313 0.00351 0.00345 0.00325 0.00315 0.00302 0.00332 0.00387 0.00234 0.00225 0.0032 0.00308 < 0.0004 < 0.0004 < 0.0004 < 0.0004 < 0.0004 < 0.0004 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002 < 0.0005 < 0.002 0.00140 0.00154 0.00233 0.00127 0.00125 0.00229 < 0.002 < 0.002 < 0.002 < 0.0004 < 0.0004 < 0.0004 < 0.0004 < 0.0004 < 0.0004 < 0.002 < 0.002 < 0.002 0.00327 0.00344 0.0037 0.00399 0.0036 0.00400 0.00376 0.00323 0.00355 < 0.0004 < 0.0004 < 0.0004 < 0.0004 < 0.0004 < 0.0004 < 0.002 < 0.002 < 0.002 3.65 3.60 3.83 3.86 3.92 3.52 3.36 < 0.0004 < 0.0004 < 0.0004 < 0.0004 < 0.002 < 0.002 < 0.002 0.0161 0.0142 0.0174 0.0132 0.036 0.0396 0.0252 < 0.0004 < 0.0004 < 0.0004 < 0.0004 < 0.002 < 0.002 < 0.002 0.00667 0.00505 0.00396 0.0123 0.00559 0.00502 0.00429 0.00899 0.00264 0.00176 0.00914 0.00419 0.00365 0.00244 2.00 2.13 2.10 1.97 2.64 2.38 2.39 < 0.0004 < 0.0004 < 0.0004 < 0.0004 < 0.002 < 0.002 0.00344 1.63 0.0027 2.17 0.00159 0.0170 0.0124 3.01 3.46 < 0.002 2.76 2.80 0.0026 2.49 < 0.002 0.0032 < 0.002 < 0.0004 < 0.0004 < 0.0004 0.000852 < 0.0004 0.00906 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002 < 0.0005 < 0.002 PYMW-7B PYMW-9 PYMW-24 PYMW-6A PYMW-22 PYMW-23 PYMW-7B PYMW-21 PYMW-6A PYMW-7B PYMW-7B PYMW-6A PYMW-7B PYMW-6A PYMW-9 PYMW-6A 1 - Data not available due to a laboratory error during sample preparation. Table 2 Groundwater Analytical Results Utah Transit Authority - Pallas Yard (Page 5 of 6) Location Analyte Methoda MCL (mg/L) Arsenic EPA 200.9 0.010 Lead EPA 200.9 0.015 Arsenic EPA 200.9 0.010 Lead EPA 200.9 0.015 Arsenic EPA 200.9 0.010 Lead EPA 200.9 0.015 Arsenic EPA 200.9 0.010 Lead EPA 200.9 0.015 Arsenic EPA 200.9 0.010 Lead EPA 200.9 0.015 Arsenic EPA 200.9 0.010 Lead EPA 200.9 0.015 Arsenic EPA 200.9 0.010 Lead EPA 200.9 0.015 Arsenic EPA 200.9 0.010 Lead EPA 200.9 0.015 Arsenic EPA 200.9 0.010 Lead EPA 200.9 0.015 Arsenic EPA 200.9 0.010 Lead EPA 200.9 0.015 Arsenic EPA 200.9 0.010 Lead EPA 200.9 0.015 Arsenic EPA 200.9 0.010 Lead EPA 200.9 0.015 Arsenic EPA 200.9 0.010 Lead EPA 200.9 0.015 Arsenic EPA 200.9 0.010 Lead EPA 200.9 0.015 * PYMW-12/-13/-124 is a blind duplicate of: a - Method changed to EPA 200.8 in 4th Qtr 2007. PYMW-6 PYMW-7 PYMW-7B PYMW-6A PYMW-7A PYMW-8 PYMW-9 PYMW-10 PYMW-11 PYMW-12/ PYMW-13/ PYMW-124 PYMW-21 PYMW-22 PYMW-23 PYMW-24 2015 2016 1 s t Q u a r t e r 2n d Q u a r t e r 3r d Q u a r t e r 4t h Q u a r t e r 1 s t Q u a r t e r 2n d Q u a r t e r 3r d Q u a r t e r 4t h Q u a r t e r 1 s t Q u a r t e r 2n d Q u a r t e r Se m i - A n n u a l E v e n t (J u l y - D e c e m b e r ) Se m i - A n n u a l E v e n t (J a n u a r y - J u n e ) Se m i - A n n u a l E v e n t (J u l y - D e c e m b e r ) < 0.002 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002 2.17 2.09 2.75 2.73 2.01 1.92 2.67 2.38 1.74 1.81 2.41 1.98 2.41 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002 0.00249 0.00255 0.00339 0.00364 < 0.002 0.00282 0.00335 0.00251 0.00253 0.00270 0.00296 0.00300 0.00382 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002 2.09 0.00289 2.65 0.00354 2.01 < 0.002 0.00332 2.4 0.00212 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002 2.04 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002 PYMW-7B PYMW-9 PYMW-7B PYMW-9 PYMW-7B PYWM-6A PYMW-9 PYMW-7B PYMW-9 PYMW-9 PYMW-6A PYMW-6A PYMW-6A 2017 2018 Table 2 Groundwater Analytical Results Utah Transit Authority - Pallas Yard (Page 6 of 6) Location Analyte Methoda MCL (mg/L) Arsenic EPA 200.9 0.010 Lead EPA 200.9 0.015 Arsenic EPA 200.9 0.010 Lead EPA 200.9 0.015 Arsenic EPA 200.9 0.010 Lead EPA 200.9 0.015 Arsenic EPA 200.9 0.010 Lead EPA 200.9 0.015 Arsenic EPA 200.9 0.010 Lead EPA 200.9 0.015 Arsenic EPA 200.9 0.010 Lead EPA 200.9 0.015 Arsenic EPA 200.9 0.010 Lead EPA 200.9 0.015 Arsenic EPA 200.9 0.010 Lead EPA 200.9 0.015 Arsenic EPA 200.9 0.010 Lead EPA 200.9 0.015 Arsenic EPA 200.9 0.010 Lead EPA 200.9 0.015 Arsenic EPA 200.9 0.010 Lead EPA 200.9 0.015 Arsenic EPA 200.9 0.010 Lead EPA 200.9 0.015 Arsenic EPA 200.9 0.010 Lead EPA 200.9 0.015 Arsenic EPA 200.9 0.010 Lead EPA 200.9 0.015 * PYMW-12/-13/-124 is a blind duplicate of: a - Method changed to EPA 200.8 in 4th Qtr 2007. PYMW-6 PYMW-7 PYMW-7B PYMW-6A PYMW-7A PYMW-8 PYMW-9 PYMW-10 PYMW-11 PYMW-12/ PYMW-13/ PYMW-124 PYMW-21 PYMW-22 PYMW-23 PYMW-24 2025 Se m i - A n n u a l E v e n t (J a n u a r y - J u n e ) Se m i - A n n u a l E v e n t (J u l y - D e c e m b e r ) Se m i - A n n u a l E v e n t (J a n u a r y - J u n e ) Se m i - A n n u a l E v e n t (J u l y - D e c e m b e r ) Se m i - A n n u a l E v e n t (J a n u a r y - J u n e ) Se m i - A n n u a l E v e n t (J u l y - D e c e m b e r ) Se m i - A n n u a l E v e n t (J a n u a r y - J u n e ) Se m i - A n n u a l E v e n t (J u l y - D e c e m b e r ) Se m i - A n n u a l E v e n t (J a n u a r y - J u n e ) Se m i - A n n u a l E v e n t (J u l y - D e c e m b e r ) Se m i - A n n u a l E v e n t (J a n u a r y - J u n e ) Se m i - A n n u a l E v e n t (J u l y - D e c e m b e r ) Se m i - A n n u a l E v e n t (J a n u a r y - J u n e ) < 0.002 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002 0.0005 0.0006 < 0.0005 0.0009 < 0.0005 0.0006 0.0005 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002 < 0.0005 < 0.0005 < 0.0005 < 0.0005 < 0.0005 < 0.0005 < 0.0005 1.28 0.990 2.15 2.62 2.32 2.16 2.04 2.46 1.95 2.52 2.43 2.75 2.25 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002 < 0.0005 < 0.0005 < 0.0005 < 0.0005 < 0.0005 < 0.0005 < 0.0005 0.002 0.004 0.002 0.00365 0.00232 0.00251 0.00220 0.0030 0.0017 0.0030 0.0025 0.0039 0.0032 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002 < 0.0005 < 0.0005 < 0.0005 < 0.0005 < 0.0005 < 0.0005 < 0.0005 0.002 < 0.002 0.002 2.61 0.00226 0.00255 0.0020 0.00290 < 0.0005 0.0030 0.00210 0.0034 0.0024 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002 < 0.0005 <0.0005 < 0.0005 < 0.0005 < 0.0005 < 0.0005 < 0.0005 PYMW-9 PYMW-6A PYMW-9 PYMW-7B PYMW-9 PYMW-9 PYMW-9 PYMW-9 PYMW-9 PYMW-9 PYMW-9 PYMW-9 PYMW-9 2019 202220202021 2023 2024 Table 3 Quality Assurance Summary Utah Transit Authority - Pallas Yard (Page 1 of 4) 1999 2000 2001 2002 2003 2004 1 s t Q u a r t e r 2 n d Q u a r t e r 3 r d Q u a r t e r 4 t h Q u a r t e r 1 s t Q u a r t e r 2 n d Q u a r t e r 3 r d Q u a r t e r 4 t h Q u a r t e r 1 s t Q u a r t e r 2 n d Q u a r t e r 3 r d Q u a r t e r 4 t h Q u a r t e r 1 s t Q u a r t e r 2 n d Q u a r t e r 3 r d Q u a r t e r 4 t h Q u a r t e r 1 s t Q u a r t e r 2 n d Q u a r t e r 3 r d Q u a r t e r 4 t h Q u a r t e r 1 s t Q u a r t e r 2 n d Q u a r t e r 3 r d Q u a r t e r 4 t h Q u a r t e r Were samples collected as per the Site Monitoring Plan?Yes Yes Yes Yes Yes Yes1 No2 Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Were Standard Operating Procedures followed?Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Were the analytical methods correct?5 Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes5 Yes Yes Were the holding times met?Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Were the reporting limits met?Yes Yes Yes Yes Yes Yes Yes No3 Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Did the laboratory conduct all required quality assurance procedures (MS/MSD or Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Were the laboratory's quality control parameters met?Yes Yes Yes Yes Yes Yes Yes Yes4 Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes4 Yes4 Yes Yes Yes Yes Yes Is there an electronic copy of data available?8 Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes 1 - Groundwater samples were collected as per the Site Monitoring Plan. Insufficient stormwater samples were obtained due to a personnel communication error. 2 - Groundwater samples were not collected within the 3rd Quarter time-frame. This does not affect the quality of the data. 3 - The reporting limit for Total Suspended Solids used by the analytical laboratory was 10 mg/L instead of 1.0 mg/L. 4 - Although some of the samples had QC parameters outside of the control or recovery limits, laboratory corrective action was not required. 5 - EPA Method 200.8 was used instead of 200.9. Methods are comparable; does not affect the quality of data. Method officially changed to EPA Method 200.8 in 4th Qtr 2007. 6 - EPA Method 160.2 was used instead of SM 2540-D. As the methods are comparable; does not affect the quality of data. 7 - The reporting limit for Total Suspended Solids used by the analytical laboratory was 3 mg/L instead of 1.0 mg/L. 8 - PDF copy of analytical data starting 2012. Table 3 Quality Assurance Summary Utah Transit Authority - Pallas Yard (Page 2 of 4) Were samples collected as per the Site Monitoring Plan? Were Standard Operating Procedures followed? Were the analytical methods correct?5 Were the holding times met? Were the reporting limits met? Did the laboratory conduct all required quality assurance procedures (MS/MSD or Were the laboratory's quality control parameters met? 8 2005 2006 2007 2008 2009 2010 1 s t Q u a r t e r 2 n d Q u a r t e r 3 r d Q u a r t e r 4 t h Q u a r t e r 1 s t Q u a r t e r 2 n d Q u a r t e r 3 r d Q u a r t e r 4 t h Q u a r t e r 1 s t Q u a r t e r 2 n d Q u a r t e r 3 r d Q u a r t e r 4 t h Q u a r t e r 1 s t Q u a r t e r 2 n d Q u a r t e r 3 r d Q u a r t e r 4 t h Q u a r t e r 1 s t Q u a r t e r 2n d Q u a r t e r 3r d Q u a r t e r 4t h Q u a r t e r 1 s t Q u a r t e r 2n d Q u a r t e r 3r d Q u a r t e r 4t h Q u a r t e r Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes6 Yes6 Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes No7 Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes4 Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes4 Yes4 Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes 1 - Groundwater samples were collected as per the Site Monitoring Plan. Insufficient stormwater samples were obtained due to a personnel communication error. 2 - Groundwater samples were not collected within the 3rd Quarter time-frame. This does not affect the quality of the data. 3 - The reporting limit for Total Suspended Solids used by the analytical laboratory was 10 mg/L instead of 1.0 mg/L. 4 - Although some of the samples had QC parameters outside of the control or recovery limits, laboratory corrective action was not required. 5 - EPA Method 200.8 was used instead of 200.9. Methods are comparable; does not affect the quality of data. Method officially changed to EPA Method 200.8 in 4th Qtr 2007. 6 - EPA Method 160.2 was used instead of SM 2540-D. As the methods are comparable; does not affect the quality of data. 7 - The reporting limit for Total Suspended Solids used by the analytical laboratory was 3 mg/L instead of 1.0 mg/L. 8 - PDF copy of analytical data starting 2012. Table 3 Quality Assurance Summary Utah Transit Authority - Pallas Yard (Page 3 of 4) Were samples collected as per the Site Monitoring Plan? Were Standard Operating Procedures followed? Were the analytical methods correct?5 Were the holding times met? Were the reporting limits met? Did the laboratory conduct all required quality assurance procedures (MS/MSD or Were the laboratory's quality control parameters met? 8 2011 2012 2013 2014 1 s t Q u a r t e r 2n d Q u a r t e r 3r d Q u a r t e r 4t h Q u a r t e r 1 s t Q u a r t e r 2n d Q u a r t e r 3r d Q u a r t e r 4t h Q u a r t e r 1 s t Q u a r t e r 2n d Q u a r t e r 3r d Q u a r t e r 4t h Q u a r t e r 1 s t Q u a r t e r 2n d Q u a r t e r 3r d Q u a r t e r 4t h Q u a r t e r 1 s t Q u a r t e r 2n d Q u a r t e r 3r d Q u a r t e r 4t h Q u a r t e r 1 s t Q u a r t e r 2n d Q u a r t e r 3r d Q u a r t e r 4t h Q u a r t e r Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes4 Yes4 Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes 1 - Groundwater samples were collected as per the Site Monitoring Plan. Insufficient stormwater samples were obtained due to a personnel communication error. 2 - Groundwater samples were not collected within the 3rd Quarter time-frame. This does not affect the quality of the data. 3 - The reporting limit for Total Suspended Solids used by the analytical laboratory was 10 mg/L instead of 1.0 mg/L. 4 - Although some of the samples had QC parameters outside of the control or recovery limits, laboratory corrective action was not required. 5 - EPA Method 200.8 was used instead of 200.9. Methods are comparable; does not affect the quality of data. Method officially changed to EPA Method 200.8 in 4th Qtr 2007. 6 - EPA Method 160.2 was used instead of SM 2540-D. As the methods are comparable; does not affect the quality of data. 7 - The reporting limit for Total Suspended Solids used by the analytical laboratory was 3 mg/L instead of 1.0 mg/L. 8 - PDF copy of analytical data starting 2012. 2015 2016 Table 3 Quality Assurance Summary Utah Transit Authority - Pallas Yard (Page 4 of 4) Were samples collected as per the Site Monitoring Plan? Were Standard Operating Procedures followed? Were the analytical methods correct?5 Were the holding times met? Were the reporting limits met? Did the laboratory conduct all required quality assurance procedures (MS/MSD or Were the laboratory's quality control parameters met? 8 2025 1 s t Q u a r t e r 2n d Q u a r t e r Se m i - A n n u a l E v e n t (J u l y - D e c e m b e r ) Se m i - A n n u a l E v e n t (J a n u a r y - J u n e ) Se m i - A n n u a l E v e n t (J u l y - D e c e m b e r ) Se m i - A n n u a l E v e n t (J a n u a r y - J u n e ) Se m i - A n n u a l E v e n t (J u l y - D e c e m b e r ) Se m i - A n n u a l E v e n t (J a n u a r y - J u n e ) Se m i - A n n u a l E v e n t (J u l y - D e c e m b e r ) Se m i - A n n u a l E v e n t (J a n u a r y - J u n e ) Se m i - A n n u a l E v e n t (J u l y - D e c e m b e r ) Se m i - A n n u a l E v e n t (J a n u a r y - J u n e ) Se m i - A n n u a l E v e n t (J u l y - D e c e m b e r ) Se m i - A n n u a l E v e n t (J a n u a r y - J u n e ) Se m i - A n n u a l E v e n t (J u l y - D e c e m b e r ) Se m i - A n n u a l E v e n t (J a n u a r y - J u n e ) Se m i - A n n u a l E v e n t (J u l y - D e c e m b e r ) Se m i - A n n u a l E v e n t (J a n u a r y - J u n e ) Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes 1 - Groundwater samples were collected as per the Site Monitoring Plan. Insufficient stormwater samples were obtained due to a personnel communication error. 2 - Groundwater samples were not collected within the 3rd Quarter time-frame. This does not affect the quality of the data. 3 - The reporting limit for Total Suspended Solids used by the analytical laboratory was 10 mg/L instead of 1.0 mg/L. 4 - Although some of the samples had QC parameters outside of the control or recovery limits, laboratory corrective action was not required. 5 - EPA Method 200.8 used instead of 200.9. Methods are comparable; does not affect the quality of data. Method officially changed to EPA Method 200.8 in 4th Qtr 2007. 6 - EPA Method 160.2 used instead of SM 2540-D. As the methods are comparable; does not affect the quality of data. 7 - The reporting limit for Total Suspended Solids used by the analytical laboratory was 3 mg/L instead of 1.0 mg/L. 8 - PDF copy of analytical data starting 2012. 2023 2024202220212020201720182019 FIGURES 4295 4300 4305 4310 4315 Gr o u n d w a t e r E l e v a t i o n ( f t ) Sampling Period Figure 1 Groundwater Elevations Utah Transit Authority - Pallas Yard PYMW-6 PYMW-6A PYMW-7 PYMW-7A PYMW-7B PYMW-8 PYMW-9 PYMW-10 PYMW-11 PYMW-21 PYMW-22 PYMW-23 PYMW-24 * PS = Performance Standard established in the Quality Assurance Project Plan. 0.000 0.005 0.010 0.015 Co n c e n t r a t i o n ( m g / L ) Sampling Period Figure 2A Arsenic and Lead Concentrations in Groundwater vs. Time Monitoring Well PYMW-6A Arsenic (PYMW-6) Lead (PYMW-6) Lead (PYMW-6A) Arsenic (PYMW-6A) Arsenic PS* (0.010 mg/L) Lead PS* (0.015 mg/L) * PS = Performance Standard established in the Quality Assurance Project Plan. 0.000 0.200 0.400 0.600 0.800 1.000 1.200 1.400 1.600 1.800 2.000 2.200 2.400 2.600 2.800 3.000 3.200 Co n c e n t r a t i o n ( m g / L ) Sampling Period Figure 2B Arsenic and Lead Concentrations in Groundwater vs. Time Monitoring Well PYMW-7B Arsenic (PYMW-7) Lead (PYMW-7) Arsenic (PYMW-7A) Lead (PYMW-7A) Arsenic (PYMW-7B) Lead (PYMW-7B) Arsenic PS* (0.010 mg/L) Lead PS* (0.015 mg/L) * PS = Performance Standard established in the Quality Assurance Project Plan. 0.000 0.005 0.010 0.015 Co n c e n t r a t i o n ( m g / L ) Sampling Period Figure 2C Arsenic and Lead Concentrations in Groundwater vs. Time Monitoring Well PYMW-9 Arsenic Lead Arsenic PS* (0.010 mg/L) Lead PS* (0.015 mg/L) Building Building Electric Substation Building Dock Monitoring Well Location Abandoned Monitoring Well Location Explanation See Figure 3b 0 75'150' Project Mngr: Approved By: Checked By: Drawn By: Project No. Scale: Date: File No.Consulting Engineers and Scientists FIGURE 6949 South High Tech Dr.Midvale, UT 84047 FAX. (801) 545-8600PH. (801) 545-8500 MONITORING WELL LOCATION MAP Utah Transit Authority - Pallas Yard Murray, UT 3A 61167137 AS SHOWN *.dwg May 2016 AF BM JK BB TRANSIT EXPRESS Plan is based on a survey by Thomson-Hysell Engineers, August 23-27, 1999. Building PYMW-7B PYMW-9 PYMW-6A PYMW-24 PYMW-23PYMW-22 PYMW-21 Surface modeled from groundwater elevation data collected from PYMW-6A, PYMW-7B, PYMW-9, PYMW-21, PYMW-22, PYMW-23, & PYMW-24 Groundwater Flow 4302.28'4302.33' 4302.31' 4302.29'4302.50' 4299.35' 4305.39' PYMW-#Monitoring Well Location Explanation Groundwater Elevation Groundwater Elevation Isocontour (Contour Interaval = 1.0') Fence Right-of-Way 4298.40' PROJECT No: SHEET: DRAWN BY:Figure 3B: Groundwater Gradient Map 1st Event, 2025 DATE: Plan is based on a survey by Thomson-Hysell Engineers, August 23-27, 1999.0 25'50' 61197043 3B RLW MAY 2025 N APPENDIX 1 Groundwater Sample Quality Control Logs APPENDIX 2 Laboratory Analytical Report The analyses presented on this report were performed in accordance with the National Environmental Laboratory Accreditation Program (NELAP) unless noted in the comments, flags, or case narrative. If the report is to be used for regulatory compliance, it should be presented in its entirety, and not be altered. Client Service Contact: 801.262.7299 Terracon IHI Attn: Steve Maliszeski 6949 South High Tech Drive Midvale, UT 84047 Work Order: 25E0837 Project: UTA Pallas Yard, 1st 2025 Semiannual GW Sampling Event 5/16/2025 Approved By: Mark Broadhead, Project Manager 9632 South 500 West Sandy, Utah 84070 Serving the Intermountain West since 1953 801.262.7299 Main 866.792.0093 Fax www.ChemtechFord.com Page 1 of 9 xx Chemtech-Ford Laboratories Serving the Intermountain West Since 1953 Certificate of Analysis 9632 South 500 West Sandy, UT 84070 O:(801) 262-7299 F: (866) 792-0093 www.ChemtechFord.com Terracon IHI Steve Maliszeski 6949 South High Tech Drive Midvale, UT 84047 PO#: Receipt: Date Reported: Project Name: Terracon/ UTA Project #61197043 5/12/25 14:49 @ 9.9 °C 5/16/2025 UTA Pallas Yard, 1st 2025 Semiannual GW Sampling Event Sample ID: PYMW 6A Lab ID: 25E0837-01Matrix: Water Flag(s)Units Analysis Date/Time Date Sampled: 5/12/25 13:09 Preparation Date/Time Sampled By: Mark Lilly Minimum Reporting Limit MethodResult Metals, Dissolved mg/L 5/13/255/13/250.0005 EPA 200.8/200.20.0005Arsenic, Dissolved mg/L 5/13/255/13/250.0005 EPA 200.8/200.2NDLead, Dissolved Project Name: UTA Pallas Yard, 1st 2025 Semiannual GW Samplin CtF WO#: 25E0837 www.ChemtechFord.com Page 2 of 9Page 2 of 9 xx Chemtech-Ford Laboratories Serving the Intermountain West Since 1953 Certificate of Analysis 9632 South 500 West Sandy, UT 84070 O:(801) 262-7299 F: (866) 792-0093 www.ChemtechFord.com Terracon IHI Steve Maliszeski 6949 South High Tech Drive Midvale, UT 84047 PO#: Receipt: Date Reported: Project Name: Terracon/ UTA Project #61197043 5/12/25 14:49 @ 9.9 °C 5/16/2025 UTA Pallas Yard, 1st 2025 Semiannual GW Sampling Event Sample ID: PYMW 7B Lab ID: 25E0837-02Matrix: Water Flag(s)Units Analysis Date/Time Date Sampled: 5/12/25 14:08 Preparation Date/Time Sampled By: Mark Lilly Minimum Reporting Limit MethodResult Metals, Dissolved mg/L 5/13/255/13/250.0005 EPA 200.8/200.22.25Arsenic, Dissolved mg/L 5/13/255/13/250.0005 EPA 200.8/200.2NDLead, Dissolved Project Name: UTA Pallas Yard, 1st 2025 Semiannual GW Samplin CtF WO#: 25E0837 www.ChemtechFord.com Page 3 of 9Page 3 of 9 xx Chemtech-Ford Laboratories Serving the Intermountain West Since 1953 Certificate of Analysis 9632 South 500 West Sandy, UT 84070 O:(801) 262-7299 F: (866) 792-0093 www.ChemtechFord.com Terracon IHI Steve Maliszeski 6949 South High Tech Drive Midvale, UT 84047 PO#: Receipt: Date Reported: Project Name: Terracon/ UTA Project #61197043 5/12/25 14:49 @ 9.9 °C 5/16/2025 UTA Pallas Yard, 1st 2025 Semiannual GW Sampling Event Sample ID: PYMW 9 Lab ID: 25E0837-03Matrix: Water Flag(s)Units Analysis Date/Time Date Sampled: 5/12/25 11:05 Preparation Date/Time Sampled By: Mark Lilly Minimum Reporting Limit MethodResult Metals, Dissolved mg/L 5/13/255/13/250.0005 EPA 200.8/200.20.0032Arsenic, Dissolved mg/L 5/13/255/13/250.0005 EPA 200.8/200.2NDLead, Dissolved Project Name: UTA Pallas Yard, 1st 2025 Semiannual GW Samplin CtF WO#: 25E0837 www.ChemtechFord.com Page 4 of 9Page 4 of 9 xx Chemtech-Ford Laboratories Serving the Intermountain West Since 1953 Certificate of Analysis 9632 South 500 West Sandy, UT 84070 O:(801) 262-7299 F: (866) 792-0093 www.ChemtechFord.com Terracon IHI Steve Maliszeski 6949 South High Tech Drive Midvale, UT 84047 PO#: Receipt: Date Reported: Project Name: Terracon/ UTA Project #61197043 5/12/25 14:49 @ 9.9 °C 5/16/2025 UTA Pallas Yard, 1st 2025 Semiannual GW Sampling Event Sample ID: PYMW 12 Lab ID: 25E0837-04Matrix: Water Flag(s)Units Analysis Date/Time Date Sampled: 5/12/25 11:33 Preparation Date/Time Sampled By: Mark Lilly Minimum Reporting Limit MethodResult Metals, Dissolved mg/L 5/13/255/13/250.0005 EPA 200.8/200.20.0024Arsenic, Dissolved mg/L 5/13/255/13/250.0005 EPA 200.8/200.2NDLead, Dissolved Project Name: UTA Pallas Yard, 1st 2025 Semiannual GW Samplin CtF WO#: 25E0837 www.ChemtechFord.com Page 5 of 9Page 5 of 9 xx Chemtech-Ford Laboratories Serving the Intermountain West Since 1953 Certificate of Analysis 9632 South 500 West Sandy, UT 84070 O:(801) 262-7299 F: (866) 792-0093 www.ChemtechFord.com Terracon IHI Steve Maliszeski 6949 South High Tech Drive Midvale, UT 84047 PO#: Receipt: Date Reported: Project Name: Terracon/ UTA Project #61197043 5/12/25 14:49 @ 9.9 °C 5/16/2025 UTA Pallas Yard, 1st 2025 Semiannual GW Sampling Event Sample ID: Field/Equipment Blank Lab ID: 25E0837-05Matrix: Water Flag(s)Units Analysis Date/Time Date Sampled: 5/12/25 14:14 Preparation Date/Time Sampled By: Mark Lilly Minimum Reporting Limit MethodResult Metals, Dissolved mg/L 5/13/255/13/250.0005 EPA 200.8/200.2NDArsenic, Dissolved mg/L 5/13/255/13/250.0005 EPA 200.8/200.2NDLead, Dissolved Project Name: UTA Pallas Yard, 1st 2025 Semiannual GW Samplin CtF WO#: 25E0837 www.ChemtechFord.com Page 6 of 9Page 6 of 9 xx Chemtech-Ford Laboratories Serving the Intermountain West Since 1953 Certificate of Analysis 9632 South 500 West Sandy, UT 84070 O:(801) 262-7299 F: (866) 792-0093 www.ChemtechFord.com Terracon IHI Steve Maliszeski 6949 South High Tech Drive Midvale, UT 84047 PO#: Receipt: Date Reported: Project Name: Terracon/ UTA Project #61197043 5/12/25 14:49 @ 9.9 °C 5/16/2025 UTA Pallas Yard, 1st 2025 Semiannual GW Sampling Event Report Footnotes Abbreviations ND = Not detected at the corresponding Minimum Reporting Limit (MRL). 1 mg/L = one milligram per liter or 1 mg/kg = one milligram per kilogram = 1 part per million. 1 ug/L = one microgram per liter or 1 ug/kg = one microgram per kilogram = 1 part per billion. 1 ng/L = one nanogram per liter or 1 ng/kg = one nanogram per kilogram = 1 part per trillion. On calculated parameters, there may be a slight difference between summing the rounded values shown on the report vs the unrounded values used in the calculation. Project Name: UTA Pallas Yard, 1st 2025 Semiannual GW Samplin CtF WO#: 25E0837 www.ChemtechFord.com Page 7 of 9Page 7 of 9 Page 8 of 9 QC Report for Work Order (WO) - 25E0837 % Rec RPD RPD Max MRL DFResultSpk ValueLimitsSource ConcAnalyte Blank - EPA 200.8 QC Sample ID: BZE0573-BLK1 Batch: BZE0573 Date Prepared: 05/13/2025 Date Analyzed: 05/13/2025 mg/LUnits: Arsenic, Dissolved ND 0.0005 1.00 Lead, Dissolved ND 0.0005 1.00 LCS - EPA 200.8 QC Sample ID: BZE0573-BS1 Batch: BZE0573 Date Prepared: 05/13/2025 Date Analyzed: 05/13/2025 mg/LUnits: Arsenic, Dissolved 96.7 85 - 115 0.039 0.0400 0.0005 1.00 Lead, Dissolved 96.3 85 - 115 0.039 0.0400 0.0005 1.00 Matrix Spike - EPA 200.8 QC Sample ID: BZE0573-MS1 QC Source Sample: 25E0837-01Batch: BZE0573 Date Prepared: 05/13/2025 Date Analyzed: 05/13/2025 mg/LUnits: Arsenic, Dissolved 104 70 - 130 0.042 0.0005 0.0400 0.0005 1.00 Lead, Dissolved 86.7 70 - 130 0.035 ND 0.0400 0.0005 1.00 CtF WO#: 25E0837 www.ChemtechFord.com Page 9 of 9