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HomeMy WebLinkAboutDERR-2024-010845 SITE INVESTIGATION REPORT WHEELER MACHINERY DERR Facility Identification No. 4001265 LUST Release Site: NPJ Prepared for Wheeler Machinery 4901 West 2100 South Salt Lake City, Utah 84120 Prepared by Geosyntec Consultants, Inc. 215 South State Street, Suite 500 Salt Lake City, Utah 84111 Project: SLC1090 September 13, 2024 SLC1090\Wheeler Machinery Site Investigation Report September 13, 2024 iii SITE INVESTIGATION REPORT WHEELER MACHINERY DERR Facility Identification No. 4001265 LUST Release Site: NPJ Prepared for Wheeler Machinery 4901 West 2100 South Salt Lake City, Utah 84120 Prepared by Geosyntec Consultants, Inc. 215 South State Street, Suite 500 Salt Lake City, Utah 84111 Brent C. Robinson, P.E. Lonnie Mercer, P.G. Senior Principal Certified Consultant #CC220 Principal Geosyntec Project Number: SLC1090 September 13, 2024 SLC1090\Wheeler Machinery Site Investigation Report September 13, 2024 ii TABLE OF CONTENTS 1. INTRODUCTION ....................................................................................................................1 2. BACKGROUND ......................................................................................................................2 2.1 Site Use ............................................................................................................................2 2.2 Site Geology and Hydrology ...........................................................................................2 2.3 Release History ................................................................................................................2 2.4 Tier 1 Closure Requirements ...........................................................................................3 3. INVESTIGATION ACTIVITIES ............................................................................................4 3.1 Scope of Work .................................................................................................................4 3.2 Health and Safety Plan ....................................................................................................4 3.3 Subsurface Utility Survey ...............................................................................................4 3.4 Drilling and Soil Sampling ..............................................................................................5 3.5 Well Construction ............................................................................................................5 3.6 Well Surveying ................................................................................................................5 3.7 Well Development ...........................................................................................................6 3.8 Groundwater Monitoring and Sampling ..........................................................................6 3.9 Sample Management and Analysis .................................................................................7 3.9.1 Sample Containers and Labeling .........................................................................7 3.9.2 Sample Packaging ...............................................................................................7 3.9.3 Chain of Custody .................................................................................................7 3.10 Decontamination .............................................................................................................8 3.11 Investigation-Derived Waste Management .....................................................................8 4. INVESTIGATION RESULTS .................................................................................................9 4.1 Site Geology and Hydrology ...........................................................................................9 4.2 Soil Analytical Results ....................................................................................................9 4.3 Groundwater Gauging and Analytical Results ................................................................9 5. SUMMARY AND CONCLUSIONS .....................................................................................10 6. REFERENCES .......................................................................................................................11 LIST OF TABLES Table 1: General Information Table 2: Well Construction Information Table 3: Soil Analytical Results Table 4: Groundwater Analytical Results SLC1090\Wheeler Machinery Site Investigation Report September 13, 2024 ii LIST OF FIGURES Figure 1: Site Location Map Figure 2: Site Map Figure 3: Groundwater Elevation Map Figure 4: Soil Sample Analytical Results Figure 5: Groundwater Sample Analytical Results LIST OF APPENDICES Appendix A: Borehole Logs Appendix B: Well Development Logs Appendix C: Laboratory Analytical Results SLC1090\Wheeler Machinery Site Investigation Report 1 September 13, 2024 1. INTRODUCTION This report is submitted to request closure of a Leaking Underground Storage Tank (LUST) release site following completion of an environmental investigation at the Wheeler Machinery property (formerly H&E Equipment) located at 4899 West 2100 South, West Valley City, Utah (Table 1, Figure 1). As the Wheeler Machinery property is relatively large (approximately 74 acres), the Site is defined in this report as the area where USTs were removed in 2017 that resulted in the issuance of LUST Release Site NPJ. Wheeler Machinery is identified in Utah Department of Environmental Quality (UDEQ) Division of Environmental Response and Remediation (DERR) records as Facility Identification No. 4001265, and the investigation activities are associated with Release Site NPJ. The location of the Site and Wheeler Machinery property is depicted in Figure 1. The purpose of this report is to document the investigation activities conducted at the Site to demonstrate that it meets the closure criteria under Utah Administrative Code R311-211. SLC1090\Wheeler Machinery Site Investigation Report 2 September 13, 2024 2.BACKGROUND 2.1 Site Use The Site covers approximately 0.15 acres within the Wheeler Machinery property and was used for diesel storage and fueling prior to the USTs being removed in 2017. Since then, the Site has been used for parking and storage of heavy equipment as part of Wheeler Machinery operations. The Wheeler Machinery property is currently used as a heavy equipment machine shop and storage facility as well as the corporate offices for Wheeler Machinery. Surrounding properties are used for commercial and industrial purposes: to the north, Stryker, a medical technology manufacturer; to the west, Saw Jockey Concrete Cutting; to the south, Weir Minerals manufacturer; and to the east, C.R. England trucking company. There are no adjacent residential properties (Figures 1 and 2). 2.2 Site Geology and Hydrology The Wheeler Machinery property is located on Quaternary young deltaic deposits consisting of clay, silt, sand, and minor pebble gravel deposited in the ancestral Jordan River delta (Solomon, 2018). The nearest quaternary fault is the West Valley Fault Zone located 0.9 miles to the northwest (UGS, 2020). Two water wells are located within 1,000 feet of the Site, as depicted in Figure 1. Well 427885 was drilled in 1966, and well 429347 was drilled in 1961. These wells are located within the Wheeler Machinery property and are not currently used for water supply. The Wheeler Machinery property is connected to a municipal water supply system. It is possible that these wells have been abandoned. The nearest surface water is a drainage ditch approximately 200 feet east of the Site (Figure 2). The drainage ditch is not a natural surface water body but an engineered ditch used to manage surface water flow in this industrial area. The drainage ditch is located hydraulically cross- gradient from the Site based on historical groundwater flow direction. Besides this drainage ditch, the nearest surface water bodies are ponds that are located over 800 feet from the Site. 2.3 Release History Four Fiberglass Reinforced Plastic (FRP) USTs were installed at the Site in 1980, approximately 75 feet north of the current location of the Wheeler Cat Rental Store. Each UST had a capacity of 12,000 gallons and stored diesel. The tanks last operated on December 21, 2016, and were closed on October 3, 2017. During closure, the tanks were removed of fuel and sludge, and cleaned. The tanks were rendered inert by adding dry ice prior to removal (Spackman Enterprises, 2017). Three soil samples and two groundwater samples were collected from the excavation during UST removal activities on October 3, 2017 (Figure 3). The soil samples and one of the groundwater samples had results that were less than the DERR Initial Screening Levels (ISLs). One groundwater sample (identified as TH-3 in the Closure Notice) that was collected from the SLC1090\Wheeler Machinery Site Investigation Report 3 September 13, 2024 southeast corner of the UST excavation had a total petroleum hydrocarbons diesel range organics (TPH-DRO) analytical result (15.7 milligrams per liter [mg/L]) that exceeded the ISL of 1 mg/L and the Tier 1 Screening Level of 10 mg/L. The other analytes (benzene, toluene, ethylbenzene, xylenes, naphthalene [BTEXN], and TPH gasoline range organics [TPH-GRO]) for the TH-3 groundwater sample were less than their respective ISLs. An Investigation Work Plan (Work Plan) was provided in response to letters dated November 22, 2022, and February 8, 2023, from DERR to Wheeler Machinery requesting that further investigation be conducted at the Site. This Site Investigation Report (SIR) summarizes completed field activities as proposed in the Work Plan as well as a request for Tier 1 Closure based on the sampling results. 2.4 Tier 1 Closure Requirements No buildings, property boundaries, or utility lines fall within 30 feet of the highest measured concentration at MW-3. No water wells or natural surface water bodies are located within 500 feet of the highest measured concentration at MW-3. The highest measured groundwater concentration onsite did not exceed the Tier 1 Screening Levels; thus, the Site meets Tier 1 closure requirements (DERR, 2021). SLC1090\Wheeler Machinery Site Investigation Report 4 September 13, 2024 3. INVESTIGATION ACTIVITIES 3.1 Scope of Work Four new groundwater monitoring wells (MW-1 through MW-4) were installed within 10 ft of the locations proposed in the Work Plan, with the exception of MW-3 which was moved about 30 feet northeast to avoid subsurface utilities and fill material from the previous excavation (Figure 3). These four wells were installed to delineate the northern, eastern, and western extent of groundwater impacts detected in TH-3 in 2017. Based on the subsurface utilities and fill material encountered at the proposed location, MW-3 could not be located closer to tank closure sampling location TH-3. The scope of work included the following activities, which are described in subsequent sections: • Health and Safety Plan • Subsurface utility survey • Drilling and soil logging • Soil sampling • Groundwater sampling • Well construction • Well development • Sample identification and management • Surveying • Investigation-derived waste (IDW) management 3.2 Health and Safety Plan Geosyntec prepared a Site-specific Health and Safety Plan (HASP) prior to implementation of the field work associated with the Work Plan. Elements of the HASP included safety personnel, hazard analysis, emergency response procedures, decontamination, personal protective equipment (PPE), and monitoring. 3.3 Subsurface Utility Survey Prior to drilling, a survey of subsurface utilities was performed to identify utilities near the proposed drilling locations. Private utility locating was performed on June 11, 2024, and involved the use of ground penetrating radar and cable avoidance tool methods to assess the potential presence of subsurface utilities near the drilling locations. Public underground utility location was completed by Blue Stakes of Utah 811 on June 12, 2024. As an additional precaution, each borehole location was cleared to a depth of 5 feet below ground surface (bgs) using hand auger and hydrovacuum methods. As noted above, one drilling location (MW-3) was moved approximately 30 feet from the proposed location based on the locations of subsurface utilities and disturbed soil identified during the subsurface utility survey (Figure 3). The remaining drilling SLC1090\Wheeler Machinery Site Investigation Report 5 September 13, 2024 locations were either not adjusted or only had slight adjustments (i.e., less than 10 feet from the proposed locations) based on the subsurface utility survey. 3.4 Drilling and Soil Sampling Direct push and hollow stem auger drilling activities were performed at the locations depicted in Figure 3. The boring locations were based on the following rationale: • MW-1 and MW-2 are located near the northeast and northwest corners of the former LUST excavation and hydraulically downgradient of the location of groundwater sample TH-3 (location where ISL exceedance was identified during 2017 UST closure sampling). • MW-3 is located near the southeast corner of the former UST excavation and proximal to the location of groundwater sample TH-3 that was collected during the 2017 UST closure sampling. • MW-4 is located near the southwest corner of the former UST excavation. Soil borings were advanced to collect soil samples and to install groundwater monitoring wells for collection of groundwater samples. Each boring was drilled to an estimated total depth of 15 feet bgs. During drilling activities, soil cores were collected at 5-foot intervals to identify soil types and to screen for volatile organic compounds (VOCs) using a photoionization detector (PID). The soil cores were logged in accordance with the Unified Soil Classification System. One soil sample per boring location was collected and placed in clean, laboratory-supplied containers for laboratory analysis. Since evidence of impacts were not observed and PID readings were less than 10 parts per million at all soil borings, the soil samples were collected at the estimated depth of the capillary fringe. Appendix A includes the final borehole and well completion logs. 3.5 Well Construction After drilling to total depth, a 2-inch Schedule 40 polyvinyl chloride (PVC) monitoring well was set in each open boring (Table 2, Appendix A). Wells were constructed with approximately 10 feet of well screen, which was screened across the water table. A sand filter pack was used to backfill the annular space between the well casing and borehole from total depth to approximately 2 feet above the top of the well screen. Hydrated bentonite chips were placed above the sand filter pack to a depth of approximately 1 feet bgs. Wells were completed at the surface with 8-inch flush mount traffic-rated well vaults. The well surface completion was set in a concrete collar to match the existing grade. 3.6 Well Surveying Following well installation, the wells were surveyed relative to a local datum to enable evaluation of groundwater flow direction using groundwater level data. The well survey was performed by SLC1090\Wheeler Machinery Site Investigation Report 6 September 13, 2024 Wheeler Machinery using laser level survey equipment. The monitoring wells were surveyed at the ground surface and top of casing for vertical control (Table 2). 3.7 Well Development The purpose of monitoring well development was to remove fine-grained materials or drilling fluids introduced into the borehole during drilling activities, enabling hydraulic connectivity between the well and the surrounding formation. The wells were developed on June 21, 2024 using a combination of pumping and surging. Water quality parameters (pH, temperature, specific conductance, dissolved oxygen, and oxidation-reduction potential) were periodically measured and recorded during well development activities (Appendix B). Depth to water measurements were also recorded periodically during and after well development. Well development was considered complete when purged groundwater was visibly clear or more than five borehole volumes of groundwater was purged from each well (as calculated from the maximum standing water elevation measured in the well). 3.8 Groundwater Monitoring and Sampling Groundwater monitoring was performed on June 25, 2024 (over 72 hours after well development) to allow the wells to equilibrate. Groundwater levels were measured to the nearest 0.01 foot using an oil-water interface probe. Depth to water and total well depth were recorded for each well. LNAPL was not detected in the wells. Well gauging measurements are referenced to the surveyed mark on the top of each well casing (Figure 3). One groundwater sample was collected from each monitoring well using a peristaltic pump and disposable tubing. The tubing intake was placed at the approximate midpoint of the saturated screen interval. Groundwater samples were collected using low flow sampling procedures. During well purging, water levels were measured to record drawdown of the water column, and the pumping rate was adjusted to minimize drawdown (typically less than 0.33 feet). Well purging was generally maintained at a constant rate between 100 and 500 milliliters per minute (mL/min) at each well. Water quality parameters were measured every 3 to 5 minutes with an in-line water quality meter equipped with a flow-through cell. Well purging was considered complete when three consecutive readings meet the following criteria: • Temperature: ± 1 degrees Celsius (°C) • pH: ± 0.1 standard units • Specific conductivity: ± 3% • Dissolved oxygen: ± 10% • Oxidation-reduction potential: ± 10% After well purging, a groundwater sample was collected by filling sample bottles (laboratory- supplied, 40-mL containers with hydrochloric acid preservative) directly from the pump discharge tubing at a sampling rate that did not exceed the purging rate. SLC1090\Wheeler Machinery Site Investigation Report 7 September 13, 2024 3.9 Sample Management and Analysis The soil and groundwater samples were submitted for analysis to Pace Analytical Laboratory’s (Pace’s) Mt. Juliet, Tennessee laboratory, which is certified by the State of Utah Department of Health and is a National Environmental Accreditation Program (NELAP) accredited laboratory. Soil and groundwater samples were submitted to the laboratory for analysis of the following: • Total Petroleum Hydrocarbons – Diesel Range Organics (TPH-DRO) by USEPA Method 8015 • BTEXN and methyl tertiary-butyl ether (MTBE) by USEPA Method 8260 3.9.1 Sample Containers and Labeling Upon collection, all samples were placed into laboratory-supplied sample containers. Clean, disposable, nitrile gloves were worn during sample handling to prevent cross-contamination between samples. Sample labels supplied by the laboratory were filled out and affixed to all sample containers. Sample container labels included the following information at a minimum: • Unique sample identification number • Sampling date and time of sample collection (24-hour format) • Sampler’s name or initials 3.9.2 Sample Packaging After labeling, each sample was placed in a cooler containing wet ice to reduce the sample temperature to approximately 4 (±2) °C during storage and transport to the laboratory. The samples were packaged and shipped in general accordance with laboratory specified procedures. 3.9.3 Chain of Custody A Chain of Custody (CoC) form was completed to track sample control and possession from the time of collection through laboratory analysis. While the samples were in the custody of the field staff, they were not left unattended at locations where the samples could have been tampered with. A sample is considered to be in custody if the following conditions have been observed: • It is in possession or view of the person in custody. • It is locked in a secure area. • It is placed in an area restricted to authorized personnel or it is placed in a container and secured with a custody seal. The analyses performed were designated on the CoC form, including the quantity and types of containers that comprised each sample and other pertinent sample information. The duplicate copy of the CoC record was retained by the sampler. SLC1090\Wheeler Machinery Site Investigation Report 8 September 13, 2024 3.10 Decontamination Non-dedicated soil and groundwater sampling equipment (e.g., direct-push rods and tips, hand augers, etc.) was decontaminated between borehole locations by first washing in a solution of Alconox and potable water, then rinsing with potable water, and finally rinsing with distilled water and air drying. The oil-water interface probe used during groundwater monitoring was decontaminated prior to use at each well by washing with an Alconox detergent and rinsing with distilled water. Decontamination activities were conducted in a manner to contain and capture liquids and other waste materials. 3.11 Investigation-Derived Waste Management Investigation derived waste (IDW) consisted of consumable field supplies (paper towels, miscellaneous paper products, etc.), disposable PPE items (nitrile gloves), purge water, decontamination water, and drilling cuttings. Consumable field supplies and PPE were collected and disposed of as non-hazardous solid waste. IDW was segregated (solids and liquids), containerized in 55-gallon drums, labeled, and temporarily staged at the facility’s waste storage area pending offsite disposal based on the analytical results. Off-site transport and appropriate treatment or disposal of IDW will be completed by Pacific West and performed with appropriate waste management documentation. SLC1090\Wheeler Machinery Site Investigation Report 9 September 13, 2024 4. INVESTIGATION RESULTS 4.1 Site Geology and Hydrology Soil encountered during drilling generally included clayey gravels, silty sand, silty clay, and clay (Appendix A). Groundwater depths ranged from approximately 5.6 to 6.5 feet below ground surface (Table 2). The groundwater elevation at each well varied less than 0.1 feet, suggesting a flat gradient, but is historically reported to flow northward (Spackman, 2017; Figure 3). 4.2 Soil Analytical Results Table 3 summarizes the soil analytical results by listing the reported concentrations of BTEXN, methyl tertiary butyl ether (MTBE), and TPH-DRO (Table 3). Figure 4 illustrates concentrations for collected soil samples. Appendix C includes the laboratory analytical reports. BTEXN, MTBE, and TPH-DRO concentrations in soil samples did not exceed ISLs or Tier 1 Screening Levels. 4.3 Groundwater Gauging and Analytical Results Table 4 summarizes the groundwater gauging and analytical results by listing the reported concentrations of BTEXN, MTBE, and TPH-DRO, followed by depth to water and water table elevation. LNAPL was not measured during groundwater gauging and sampling activities. Figure 5 illustrates concentrations for collected groundwater samples. Appendix C includes the laboratory analytical reports. One groundwater sample (MW-2 GW) collected from the northeast corner of the Site had a TPH- DRO concentration of 1.34 mg/L which slightly exceeded the ISL of 1 mg/L, but was less than the Tier 1 Screening Level of 10 mg/L. BTEXN and MTBE concentrations did not exceeded ISLs or Tier 1 Screening Level in this sample. No ISL or Tier 1 Screening Level exceedances were identified in any of the other samples. MW-2 is not located within 30 feet of buildings, property boundaries, and utility lines. It is also located over 500 ft away from water wells and significant surface water bodies. SLC1090\Wheeler Machinery Site Investigation Report 10 September 13, 2024 5. SUMMARY AND CONCLUSIONS Based on the soil and groundwater results from this site investigation, it is concluded that the Site meets the criteria for Tier 1 closure under Utah Administrative Code R311-211 with no further remediation activities; therefore, we respectfully request closure of the LUST release identified as NPJ. SLC1090\Wheeler Machinery Site Investigation Report 11 September 13, 2024 6. REFERENCES Solomon, B. J., 2018. Geologic map of the Magna quadrangle, Salt Lake County, Utah (GIS Reproduction of 2007 map). Utah Geologic Survey. Scale 1:24,000. DOI: https://doi.org/10.34191/M-216DM. Spackman Enterprises, 2017. Underground Storage Tank Permanent Closure Notice – Wheeler Machinery. October 18, 2017. Utah Department of Environmental Remediation and Response (DERR), 2021. Utah Petroleum Storage Tank Environmental Media Sampling Handbook. Retrieved from https://documents.deq.utah.gov/environmental-response-and-remediation/ust-lust/leaking- underground-storage-tanks-petroleum-storage/DERR-2021-015465.pdf. Utah Geologic Survey (UGS), 2020. Utah Quaternary Faults. Accessed in August 2024 at: https://opendata.gis.utah.gov/datasets/utahDNR::utah-quaternary-faults/about. SLC1090\Wheeler Machinery Site Investigation Report September 13, 2024 TABLES Table 1: General Information Wheeler Machinery Site Investigation Report 2024 UST Facility Name Wheeler Machinery Facility ID 4001265 Release ID NPJ Address 4901 West 2100 South Facility Phone Number Owner/operator name Dirk Anderson Address 4901 West 2100 South Phone 801-978-1865 Certified Consulant Brent Robinson Certification Number CC220 Company Address 215 S State Street, SLC, Utah 84111 Phone 801-853-8308 Certified Sampler Annie Brown Certification Number GS 1922 Company Address 215 S State Street, SLC, Utah 84111 Phone 801-491-8842 Driller Justin Heath Certification Number 974 Company Address 3131 E Highway 199, Springtown, TX 76082 Phone 817-217-5351 NELAP Certified Laboratory PACE Analytical Laboratories Certification Number TN000032023-16 Address 12065 Lebanon Road, Mt. Juliet, TN 37122 Phone 615-773-9712 Table 2: Well Construction Data Table Wheeler Machinery Site Investigation Report 2024 Well ID Date Installed Casing Diameter (in) TOC Elevation (Ground Surface) (ft amsl) Slot Size (in) Screened Interval (ft bgs) Measured Well Depth (ft bgs) Depth to Water (ft bgs) Water Table Elevation (ft amsl) Latitude Longitude MW-1 6/18/2024 2.25 4,250.10 0.01 5-15 15 6.15 4243.946 40.72257 -112.00695 MW-2 6/18/2024 2.25 4,249.57 0.01 5-15 15 5.58 4243.986 40.72259 -112.00667 MW-3 6/18/2024 2.25 4,250.15 0.01 5-15 15 6.20 4243.952 40.72233 -112.00662 MW-4 6/18/2024 2.25 4,250.41 0.01 5-15 15 6.51 4243.901 40.72234 -112.00699 Notes: TOC = Top Of Casing MW = Monitoring Well in = inches ft = feet amsl = above mean sea level bgs = below ground surface Table 3: Soil Analytical Data Table Wheeler Machinery Site Investigation Report 2024 Benzene Toluene Ethylbenzene Total Xylenes Naphthalene MTBE TPH-DRO (8015) MW-1 SS 6/18/24 5-6 <0.00137 0.00257 J 0.0017 J 0.00121 J <0.0172 <0.00137 12.8 MW-2 SS 6/18/24 5-6 <0.00159 0.00241 J <0.00398 <0.0104 <0.0199 <0.00159 3.89 J MW-3 SS 6/18/24 5-5.5 <0.00143 0.00202 J <0.00359 <0.00932 <0.0179 <0.00143 6.59 J MW-4 SS 6/18/24 6-6.5 <0.00142 0.00188 J <0.00355 <0.00924 <0.0178 <0.00142 2.93 J 0.2 9 5 142 51 0.3 500 0.9 25 23 142 51 0.3 5000 Notes: ft = feet bgs = below ground surface mg/kg = milligram/kilogram J = estimated; analyte detected between Method Detection Limit and Practical Quantitation Limit Detected concentrations in bold exceed their respective NDEP Reportable Concentration. Initial Screening Levels Tier 1 Screening Levels Soil Analytical Data Table (mg/kg) Sample ID Sample Date Collection Depth (ft bgs) Analytical Method (8260B) Table 4: Groundwater Analytical and Elevation Data Table Wheeler Machinery Site Investigation Report 2024 Benzene Toluene Ethylbenzene Total Xylenes Naphthalene MTBE TPH-DRO (3511/8015) MW-1 GW 6/25/24 <0.00100 <0.00100 <0.00100 <0.00300 <0.00500 <0.00100 0.796 6.15 4,243.95 MW-2 GW 6/25/24 0.00013 J <0.00100 <0.00100 <0.00300 <0.00500 <0.00100 1.34 5.58 4,243.99 MW-3 GW 6/25/24 <0.00100 <0.00100 <0.00100 <0.00300 <0.00500 <0.00100 0.301 6.2 4,243.95 MW-4 GW 6/25/24 <0.00100 <0.00100 <0.00100 <0.00300 <0.00500 <0.00100 0.348 6.51 4,243.90 0.005 1 0.7 10 0.7 0.2 1 0.3 3 4 10 0.7 0.2 10 Notes: ft = feet bgs = below ground surface mg/l = milligram/liter J = estimated; analyte detected between Method Detection Limit and Practical Quantitation Limit Detected concentrations in bold exceed their respective NDEP Reportable Concentration. Groundwater Analytical Data Table (mg/l) Depth to Water (ft bgs) Water Table Elevation (ft) Tier 1 Screening Levels Sample ID Sample Date Analytical Method (8260B) Initial Screening Levels SLC1090\Wheeler Machinery Site Investigation Report September 13, 2024 FIGURES Figure 1: SITE LOCATION MAP West Valley City, Utah 84120 BASEMAP SOURCE: USGS. Magna Quadrangle, Utah – Salt Lake County. 7.5-Minute Series. U.S. Department of the Interior, 2023. GROUNDWATER WELL SOURCE: Utah Division of Water Rights, website accessed on 8/21/2024: https://maps.waterrights.utah.gov/EsriMap/map.asp?layersToAdd=wellsearch 4901 West 2100 South Dispenser Islands 0.5 mile Buffer for within 1000 ft of site Groundwater well and ID number Site location (UST excavation area) N Wheeler Machinery roperty boundary 427885 429347 Figure 2: Site Map West Valley City, Utah 84120 4901 West 2100 South Source: Salt Lake County, Aerial Date: 2023-05-24 Legal Description: Parcel 14-24-227-010-0000LUST excavation boundary 48 0 0 W Wheeler Cat Rental Store C.R. England Trucking Property Equipment Wash Area Rental Maintenance Shop C.R. England property boundary Wheeler Machinery property boundary Wheeler Machinery Property Ditch 150 feet Figure 3: Groundwater Elevation Map West Valley City, Utah 84120 4901 West 2100 South Source: Salt Lake County, Aerial Date: 2023-05-24 Legal Description: Parcel 14-24-227-010-0000 MW-1 4,243.95 ft MW-2 4.243.99 ft MW-3 4.243.95 ft TH-2 TH-1 TH-3 June 2024 Geosyntec boring locations 2017 Sampling locations from UST closure TH-4 MW-4 4,243.90 ft Notes: ft: feet 4.243.95: June 2024 groundwater level elevation in feet above mean sea level LUST excavation boundary Inferred groundwater direction Sewer Unknown Electric Power Utility Line Locations (Approximate): Figure 4: Soil Sample Analytical Results West Valley City, Utah 84120 4901 West 2100 South Source: Salt Lake County, Aerial Date: 2023-05-24 Legal Description: Parcel 14-24-227-010-0000 MW-1 MW-2 MW-3 TH-2 TH-1 TH-3 June 2024 Geosyntec boring locations 2017 Sampling locations from UST closure Inferred groundwater flow direction (north) based on previous investigations TH-4 MW-4 Notes: ft bgs: feet below ground surface mg/l: milligrams per liter TPH-DRO: total petroleum hydrocarbons-diesel range organics LUST excavation boundary Figure 5: Groundwater Sample Analytical Results West Valley City, Utah 84120 4901 West 2100 South Source: Salt Lake County, Aerial Date: 2023-05-24 Legal Description: Parcel 14-24-227-010-0000 MW-1 MW-2 MW-3 TH-2 TH-1 TH-3 June 2024 Geosyntec boring locations 2017 Sampling locations from UST closure Inferred groundwater flow direction (north) based on previous investigations TH-4 MW-4 Notes: ft bgs: feet below ground surface mg/l: milligrams per liter TPH-DRO: total petroleum hydrocarbons-diesel range organics LUST excavation boundary SLC1090\Wheeler Machinery Site Investigation Report September 13, 2024 APPENDIX A Borehole Logs (0'-0.5') ASPHALT (0.5'-2') FILL (GC) (2'-5') CLAYEY GRAVEL: moist, clayey gravel with sand and subrounded cobbles < 8 inches. (5'-7') Same as above; wet, organics. (SM) (7'-9') SILTY SAND: grey, wet, fine. (CL-ML) (9'-15') SILTY CLAY: grey, moist, orange oxidation. Bottom of borehole at 15.0 feet. 0.5 2.0 7.0 9.0 15.0 4249.6 4248.1 4243.1 4241.1 4235.1 Cement seal (0.5'-2' bgs) Bentonite seal (2'-4' bgs) Sand pack (4'-15' bgs) Well screen: 2" Sch 40 PVC. Slot size: 0.010" (4.5'-14.5') NOTES 0-5 ft bgs cleared using hydrovac GROUND ELEVATION 4250.1 ft LOGGED BY Annie Brown DRILLING METHOD Hollow stem auger , direct push HOLE SIZE 7.25" DRILLING CONTRACTOR Pacific West GROUND WATER LEVELS: CHECKED BY Lonnie Mercer DATE STARTED 6/17/24 COMPLETED 6/18/24 AT TIME OF DRILLING 6.00 ft bgs / Elev 4244.10 ft MATERIAL DESCRIPTION WELL DIAGRAM GR A P H I C LO G Casing Top Elev: 4250.096 (ft) Casing Type: 2" Sch 40 PVCFlush mount protective well casingSA M P L E T Y P E NU M B E R PI D ( p p m ) SO I L O D O R DE P T H (f t ) 0 5 10 15 PAGE 1 OF 1 BORING NUMBER MW-1 PROJECT NAME Site Investigation Report PROJECT LOCATION 4901 W 2100 S CLIENT Wheeler Machinery PROJECT NUMBER SLC1090 EN V I R O N M E N T A L B H - D A T A T E M P L A T E E N V I R O N M E N T A L L O G A B . G D T - 8 / 3 0 / 2 4 0 8 : 5 8 - S : \ P R O J E C T S \ C \ C A M P B E L L C O M P A N I E S \ W H E E L E R L U S T I N V E S T I G A T I O N \ W H E E L E R G I N T L O G S . G P J Geosyntec Consultants 215 S State Street Suite 500 Salt Lake City, Utah 84111 Telephone: 801-618-0483 WELL LATITUDE WELL LONGITUDE 5' MW-1 SS 10' MW-1 GW No 0.3 No No 40.72257 -112.00695 Slight 0.2 0.2 (0'-0.5') ASPHALT (GP) (0.5'-2') FILL (GC) (2'-5') CLAYEY GRAVEL: brown, moist, clay to cobbles. (ML) (5'-6) SILT: brown, wet. (SM) (6'-8') SILTY SAND: grey-brown, wet, fine grained, micaceous. (CL-ML) (8'-15') SILTY CLAY: grey-brown, very moist to moist, oxidized. (13'-15') Same as above; brown, wet, organics. Bottom of borehole at 15.0 feet. 0.5 2.0 5.0 6.0 8.0 15.0 4249.1 4247.6 4244.6 4243.6 4241.6 4234.6 Cement seal (0.5'-2' bgs) Bentonite seal (2'-4' bgs) Sand pack (4'-15' bgs) Well screen: 2" Sch 40 PVC. Slot size: 0.01" (4.5'-15' bgs) NOTES 0-5 ft bgs cleared using hydrovac GROUND ELEVATION 4249.57 ft LOGGED BY Annie Brown DRILLING METHOD Hollow stem auger , direct push HOLE SIZE 7.25" DRILLING CONTRACTOR Pacific West GROUND WATER LEVELS: CHECKED BY Lonnie Mercer DATE STARTED 6/17/24 COMPLETED 6/18/24 MATERIAL DESCRIPTION WELL DIAGRAM GR A P H I C LO G Casing Top Elev: 4249.566 (ft) Casing Type: 2" Sch 40 PVCFlush mount protective well casingSA M P L E T Y P E NU M B E R PI D ( p p m ) SO I L O D O R DE P T H (f t ) 0 5 10 15 PAGE 1 OF 1 BORING NUMBER MW-2 PROJECT NAME Site Investigation Report PROJECT LOCATION 4901 W 2100 S CLIENT Wheeler Machinery PROJECT NUMBER SLC1090 EN V I R O N M E N T A L B H - D A T A T E M P L A T E E N V I R O N M E N T A L L O G A B . G D T - 8 / 3 0 / 2 4 0 8 : 5 8 - S : \ P R O J E C T S \ C \ C A M P B E L L C O M P A N I E S \ W H E E L E R L U S T I N V E S T I G A T I O N \ W H E E L E R G I N T L O G S . G P J Geosyntec Consultants 215 S State Street Suite 500 Salt Lake City, Utah 84111 Telephone: 801-618-0483 AT TIME OF DRILLING 6.00 ft bgs / Elev 4243.57 ft WELL LATITUDE 40.72259 WELL LONGITUDE -112.00667 10' MW-2 GW 5' MW-2 SS No No 0.2 0.3 0.3 (0'-0.5') ASPHALT (0.5'-3') FILL (GC) (3'-5.5') CLAYEY GRAVEL: brown, moist, clay to cobbles (SM) (5.5'-7') SILTY SAND: grey, wet, micaceous. (CL-ML) (7'-15') SILTY CLAY: brown, wet. Bottom of borehole at 15.0 feet. 0.5 3.0 5.5 7.0 15.0 4249.7 4247.2 4244.7 4243.2 4235.2 Cement seal (0.5'-2' bgs) Bentonite seal (2'-4' bgs) Sand pack (4'-15' bgs) Well screen: 2" Sch 40 PVC. Slot size: 0.01" (4.5'-15' bgs) NOTES 0-5 ft bgs cleared using hydrovac GROUND ELEVATION 4250.15 ft LOGGED BY Annie Brown DRILLING METHOD Hollow stem auger , direct push HOLE SIZE 7.25" DRILLING CONTRACTOR Pacific West GROUND WATER LEVELS: CHECKED BY Lonnie Mercer DATE STARTED 6/17/24 COMPLETED 6/18/24 AT TIME OF DRILLING 5.50 ft bgs/ Elev 4244.65 ft MATERIAL DESCRIPTION WELL DIAGRAM GR A P H I C LO G Casing Top Elev: 4250.152 (ft) Casing Type: 2" Sch 40 PVCFlush mount protective well casingSA M P L E T Y P E NU M B E R PI D (p p m ) SO I L O D O R DE P T H (f t ) 0 5 10 15 PAGE 1 OF 1 BORING NUMBER MW-3 PROJECT NAME Site Investigation Report PROJECT LOCATION 4901 W 2100 S CLIENT Wheeler Machinery PROJECT NUMBER SLC1090 EN V I R O N M E N T A L B H - D A T A T E M P L A T E E N V I R O N M E N T A L L O G A B . G D T - 8 / 3 0 / 2 4 0 8 : 5 8 - S : \ P R O J E C T S \ C \ C A M P B E L L C O M P A N I E S \ W H E E L E R L U S T I N V E S T I G A T I O N \ W H E E L E R G I N T L O G S . G P J Geosyntec Consultants 215 S State Street Suite 500 Salt Lake City, Utah 84111 Telephone: 801-618-0483 WELL LATITUDE 40.72233 WELL LONGITUDE -112.00662 5' MW-3 SS 10' MW-3 GW No 0.2 No 0.1 0.2 (0'-0.5') ASPHALT (0.5'-3.5') FILL (GC) (3.5'-5.5') CLAYEY GRAVEL: brown, moist. (ML)(5.5'-9') SILT: brown, moist, organics. (6.5) Same as above; wet. (7.5'-8') Hard pan (CL) CLAY: grey, moist, oxidation. Bottom of borehole at 15.0 feet. 0.5 3.5 5.5 9.0 15.0 4249.9 4246.9 4244.9 4241.4 4235.4 Cement seal (0.5'-2' bgs) Bentonite seal (2'-4' bgs) Sand pack (4'-15' bgs) Well screen: 2" Sch 40 PVC. Slot size: 0.01" (4.5'-15' bgs) NOTES 0-5 ft bgs cleared using hydrovac GROUND ELEVATION 4250.41 ft LOGGED BY Annie Brown DRILLING METHOD Hollow stem auger , direct push HOLE SIZE 7.25" DRILLING CONTRACTOR Pacific West GROUND WATER LEVELS: CHECKED BY Lonnie Mercer DATE STARTED 6/17/24 COMPLETED 6/18/24 AT TIME OF DRILLING 6.50 ft bgs/ Elev 4243.91 ft MATERIAL DESCRIPTION WELL DIAGRAM GR A P H I C LO G Casing Top Elev: 4250.411 (ft) Casing Type: 2" Sch 40 PVCFlush mount protective well casingSA M P L E T Y P E NU M B E R EN V I R O N M E N T A L DA T A SO I L O D O R DE P T H (f t ) 0 5 10 15 PAGE 1 OF 1 BORING NUMBER MW-4 PROJECT NAME Site Investigation Report PROJECT LOCATION 4901 W 2100 S CLIENT Wheeler Machinery PROJECT NUMBER SLC1090 EN V I R O N M E N T A L B H - D A T A T E M P L A T E E N V I R O N M E N T A L L O G A B . G D T - 8 / 3 0 / 2 4 0 8 : 5 8 - S : \ P R O J E C T S \ C \ C A M P B E L L C O M P A N I E S \ W H E E L E R L U S T I N V E S T I G A T I O N \ W H E E L E R G I N T L O G S . G P J Geosyntec Consultants 215 S State Street Suite 500 Salt Lake City, Utah 84111 Telephone: 801-618-0483 WELL LATITUDE 40.72234 WELL LONGITUDE -112.00699 10' MW-3 GW 6' MW-4 SS No No 0.1 0.1 SLC1090\Wheeler Machinery Site Investigation Report September 13, 2024 APPENDIX B Well Development Logs SLC1090\Wheeler Machinery Site Investigation Report September 13, 2024 APPENDIX C Laboratory Analytical Reports ANALYTICAL REPORT July 02, 2024 Geosyntec Consultants - UT Sample Delivery Group:L1748467 Samples Received:06/19/2024 Project Number:SLC 1090 Description:Wheeler Machinery Report To:Annie Brown 215 South State Street Suite 500 Salt Lake City, UT 84111 Entire Report Reviewed By: July 02, 2024 [Preliminary Report] Chris Ward Project Manager Results relate only to the items tested or calibrated and are reported as rounded values. This test report shall not be reproduced, except in full, without written approval of the laboratory. Where applicable, sampling conducted by Pace Analytical National is performed per guidance provided in laboratory standard operating procedures ENV-SOP-MTJL-0067 and ENV-SOP-MTJL-0068. Where sampling conducted by the customer, results relate to the accuracy of the information provided, and as the samples are received. Pace Analytical National 12065 Lebanon Rd Mount Juliet, TN 37122 615-758-5858 800-767-5859 mydata.pacelabs.com 1 Cp 2 Tc 3 Ss 4 Cn 5 Sr 6 Qc 7 Gl 8 Al 9 Sc ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE: Geosyntec Consultants - UT SLC 1090 L1748467 07/02/24 15:06 1 of 16 July 02, 2024 Chris Ward Project Manager ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE: Geosyntec Consultants - UT SLC 1090 L1748467 07/02/24 15:11 1 of 16 TABLE OF CONTENTS Cp: Cover Page 1 Tc: Table of Contents 2 Ss: Sample Summary 3 Cn: Case Narrative 4 Sr: Sample Results 5 MW-2 SS L1748467-01 5 MW-1 SS L1748467-02 6 MW-4 SS L1748467-03 7 MW-3 SS L1748467-04 8 Qc: Quality Control Summary 9 Total Solids by Method 2540 G-2011 9 Volatile Organic Compounds (GC/MS) by Method 8260B 11 Semi-Volatile Organic Compounds (GC) by Method 8015 12 Gl: Glossary of Terms 14 Al: Accreditations & Locations 15 Sc: Sample Chain of Custody 16 1 Cp 2 Tc 3 Ss 4 Cn 5 Sr 6 Qc 7 Gl 8 Al 9 Sc ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE: Geosyntec Consultants - UT SLC 1090 L1748467 07/02/24 15:06 2 of 16 ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE: Geosyntec Consultants - UT SLC 1090 L1748467 07/02/24 15:11 2 of 16 SAMPLE SUMMARY Collected by Collected date/time Received date/time MW-2 SS L1748467-01 Solid Annie Brown 06/18/24 08:30 06/19/24 09:00 Method Batch Dilution Preparation Analysis Analyst Location date/time date/time Total Solids by Method 2540 G-2011 WG2308742 1 06/21/24 13:00 06/21/24 13:10 CMB Mt. Juliet, TN Volatile Organic Compounds (GC/MS) by Method 8260B WG2311738 1 06/18/24 08:30 06/25/24 16:57 JAH Mt. Juliet, TN Semi-Volatile Organic Compounds (GC) by Method 8015 WG2312219 1 06/27/24 06:53 06/27/24 18:49 JAS Mt. Juliet, TN Collected by Collected date/time Received date/time MW-1 SS L1748467-02 Solid Annie Brown 06/18/24 10:05 06/19/24 09:00 Method Batch Dilution Preparation Analysis Analyst Location date/time date/time Total Solids by Method 2540 G-2011 WG2308742 1 06/21/24 13:00 06/21/24 13:10 CMB Mt. Juliet, TN Volatile Organic Compounds (GC/MS) by Method 8260B WG2311738 1 06/18/24 10:05 06/25/24 17:16 JAH Mt. Juliet, TN Semi-Volatile Organic Compounds (GC) by Method 8015 WG2312219 1 06/27/24 06:53 06/27/24 18:49 JAS Mt. Juliet, TN Collected by Collected date/time Received date/time MW-4 SS L1748467-03 Solid Annie Brown 06/18/24 11:25 06/19/24 09:00 Method Batch Dilution Preparation Analysis Analyst Location date/time date/time Total Solids by Method 2540 G-2011 WG2308742 1 06/21/24 13:00 06/21/24 13:10 CMB Mt. Juliet, TN Volatile Organic Compounds (GC/MS) by Method 8260B WG2311738 1 06/18/24 11:25 06/25/24 17:35 JAH Mt. Juliet, TN Semi-Volatile Organic Compounds (GC) by Method 8015 WG2313040 1 06/28/24 15:01 07/02/24 03:31 JAS Mt. Juliet, TN Collected by Collected date/time Received date/time MW-3 SS L1748467-04 Solid Annie Brown 06/18/24 13:45 06/19/24 09:00 Method Batch Dilution Preparation Analysis Analyst Location date/time date/time Total Solids by Method 2540 G-2011 WG2308744 1 06/21/24 10:15 06/21/24 10:15 CMB Mt. Juliet, TN Volatile Organic Compounds (GC/MS) by Method 8260B WG2311738 1 06/18/24 13:45 06/25/24 17:54 JAH Mt. Juliet, TN Semi-Volatile Organic Compounds (GC) by Method 8015 WG2313040 5 06/28/24 15:01 07/01/24 07:26 JDG 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: Geosyntec Consultants - UT SLC 1090 L1748467 07/02/24 15:06 3 of 16 ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE: Geosyntec Consultants - UT SLC 1090 L1748467 07/02/24 15:11 3 of 16 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] Chris Ward 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: Geosyntec Consultants - UT SLC 1090 L1748467 07/02/24 15:06 4 of 16 Chris Ward Project Manager ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE: Geosyntec Consultants - UT SLC 1090 L1748467 07/02/24 15:11 4 of 16 SAMPLE RESULTS - 01 L1748467 MW-2 SS Collected date/time: 06/18/24 08:30 Total Solids by Method 2540 G-2011 Result Qualifier Dilution Analysis Batch Analyte %date / time Total Solids 78.1 1 06/21/2024 13:10 WG2308742 Volatile Organic Compounds (GC/MS) by Method 8260B Result (dry)Qualifier MDL (dry)RDL (dry)Dilution Analysis Batch Analyte mg/kg mg/kg mg/kg date / time Benzene U 0.000744 0.00159 1 06/25/2024 16:57 WG2311738 Toluene 0.00241 J 0.00207 0.00797 1 06/25/2024 16:57 WG2311738 Ethylbenzene U 0.00117 0.00398 1 06/25/2024 16:57 WG2311738 Total Xylenes U 0.00140 0.0104 1 06/25/2024 16:57 WG2311738 Methyl tert-butyl ether U 0.000558 0.00159 1 06/25/2024 16:57 WG2311738 Naphthalene U 0.00778 0.0199 1 06/25/2024 16:57 WG2311738 (S) Toluene-d8 106 75.0-131 06/25/2024 16:57 WG2311738 (S) 4-Bromofluorobenzene 100 67.0-138 06/25/2024 16:57 WG2311738 (S) 1,2-Dichloroethane-d4 93.8 70.0-130 06/25/2024 16:57 WG2311738 Semi-Volatile Organic Compounds (GC) by Method 8015 Result (dry)Qualifier MDL (dry)RDL (dry)Dilution Analysis Batch Analyte mg/kg mg/kg mg/kg date / time TPH (GC/FID) High Fraction 3.89 J 0.984 5.12 1 06/27/2024 18:49 WG2312219 (S) o-Terphenyl 53.8 18.0-148 06/27/2024 18:49 WG2312219 1 Cp 2 Tc 3 Ss 4 Cn 5 Sr 6 Qc 7 Gl 8 Al 9 Sc ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE: Geosyntec Consultants - UT SLC 1090 L1748467 07/02/24 15:06 5 of 16 ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE: Geosyntec Consultants - UT SLC 1090 L1748467 07/02/24 15:11 5 of 16 SAMPLE RESULTS - 02 L1748467 MW-1 SS Collected date/time: 06/18/24 10:05 Total Solids by Method 2540 G-2011 Result Qualifier Dilution Analysis Batch Analyte %date / time Total Solids 85.4 1 06/21/2024 13:10 WG2308742 Volatile Organic Compounds (GC/MS) by Method 8260B Result (dry)Qualifier MDL (dry)RDL (dry)Dilution Analysis Batch Analyte mg/kg mg/kg mg/kg date / time Benzene U 0.000642 0.00137 1 06/25/2024 17:16 WG2311738 Toluene 0.00257 J 0.00179 0.00687 1 06/25/2024 17:16 WG2311738 Ethylbenzene 0.00170 J 0.00101 0.00344 1 06/25/2024 17:16 WG2311738 Total Xylenes 0.00121 J 0.00121 0.00893 1 06/25/2024 17:16 WG2311738 Methyl tert-butyl ether U 0.000481 0.00137 1 06/25/2024 17:16 WG2311738 Naphthalene U 0.00671 0.0172 1 06/25/2024 17:16 WG2311738 (S) Toluene-d8 105 75.0-131 06/25/2024 17:16 WG2311738 (S) 4-Bromofluorobenzene 101 67.0-138 06/25/2024 17:16 WG2311738 (S) 1,2-Dichloroethane-d4 91.5 70.0-130 06/25/2024 17:16 WG2311738 Semi-Volatile Organic Compounds (GC) by Method 8015 Result (dry)Qualifier MDL (dry)RDL (dry)Dilution Analysis Batch Analyte mg/kg mg/kg mg/kg date / time TPH (GC/FID) High Fraction 12.8 0.900 4.68 1 06/27/2024 18:49 WG2312219 (S) o-Terphenyl 37.1 18.0-148 06/27/2024 18:49 WG2312219 1 Cp 2 Tc 3 Ss 4 Cn 5 Sr 6 Qc 7 Gl 8 Al 9 Sc ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE: Geosyntec Consultants - UT SLC 1090 L1748467 07/02/24 15:06 6 of 16 ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE: Geosyntec Consultants - UT SLC 1090 L1748467 07/02/24 15:11 6 of 16 SAMPLE RESULTS - 03 L1748467 MW-4 SS Collected date/time: 06/18/24 11:25 Total Solids by Method 2540 G-2011 Result Qualifier Dilution Analysis Batch Analyte %date / time Total Solids 83.9 1 06/21/2024 13:10 WG2308742 Volatile Organic Compounds (GC/MS) by Method 8260B Result (dry)Qualifier MDL (dry)RDL (dry)Dilution Analysis Batch Analyte mg/kg mg/kg mg/kg date / time Benzene U 0.000664 0.00142 1 06/25/2024 17:35 WG2311738 Toluene 0.00188 J 0.00185 0.00710 1 06/25/2024 17:35 WG2311738 Ethylbenzene U 0.00105 0.00355 1 06/25/2024 17:35 WG2311738 Total Xylenes U 0.00125 0.00924 1 06/25/2024 17:35 WG2311738 Methyl tert-butyl ether U 0.000497 0.00142 1 06/25/2024 17:35 WG2311738 Naphthalene U 0.00693 0.0178 1 06/25/2024 17:35 WG2311738 (S) Toluene-d8 105 75.0-131 06/25/2024 17:35 WG2311738 (S) 4-Bromofluorobenzene 102 67.0-138 06/25/2024 17:35 WG2311738 (S) 1,2-Dichloroethane-d4 95.5 70.0-130 06/25/2024 17:35 WG2311738 Semi-Volatile Organic Compounds (GC) by Method 8015 Result (dry)Qualifier MDL (dry)RDL (dry)Dilution Analysis Batch Analyte mg/kg mg/kg mg/kg date / time TPH (GC/FID) High Fraction 2.93 J 0.917 4.77 1 07/02/2024 03:31 WG2313040 (S) o-Terphenyl 83.9 18.0-148 07/02/2024 03:31 WG2313040 1 Cp 2 Tc 3 Ss 4 Cn 5 Sr 6 Qc 7 Gl 8 Al 9 Sc ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE: Geosyntec Consultants - UT SLC 1090 L1748467 07/02/24 15:06 7 of 16 ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE: Geosyntec Consultants - UT SLC 1090 L1748467 07/02/24 15:11 7 of 16 SAMPLE RESULTS - 04 L1748467 MW-3 SS Collected date/time: 06/18/24 13:45 Total Solids by Method 2540 G-2011 Result Qualifier Dilution Analysis Batch Analyte %date / time Total Solids 82.4 1 06/21/2024 10:15 WG2308744 Volatile Organic Compounds (GC/MS) by Method 8260B Result (dry)Qualifier MDL (dry)RDL (dry)Dilution Analysis Batch Analyte mg/kg mg/kg mg/kg date / time Benzene U 0.000670 0.00143 1 06/25/2024 17:54 WG2311738 Toluene 0.00202 J 0.00186 0.00717 1 06/25/2024 17:54 WG2311738 Ethylbenzene U 0.00106 0.00359 1 06/25/2024 17:54 WG2311738 Total Xylenes U 0.00126 0.00932 1 06/25/2024 17:54 WG2311738 Methyl tert-butyl ether U 0.000502 0.00143 1 06/25/2024 17:54 WG2311738 Naphthalene U 0.00700 0.0179 1 06/25/2024 17:54 WG2311738 (S) Toluene-d8 106 75.0-131 06/25/2024 17:54 WG2311738 (S) 4-Bromofluorobenzene 101 67.0-138 06/25/2024 17:54 WG2311738 (S) 1,2-Dichloroethane-d4 93.1 70.0-130 06/25/2024 17:54 WG2311738 Semi-Volatile Organic Compounds (GC) by Method 8015 Result (dry)Qualifier MDL (dry)RDL (dry)Dilution Analysis Batch Analyte mg/kg mg/kg mg/kg date / time TPH (GC/FID) High Fraction 6.59 J 4.67 24.3 5 07/01/2024 07:26 WG2313040 (S) o-Terphenyl 56.9 18.0-148 07/01/2024 07:26 WG2313040 Sample Narrative: L1748467-04 WG2313040: Cannot run at lower dilution due to viscosity of extract. 1 Cp 2 Tc 3 Ss 4 Cn 5 Sr 6 Qc 7 Gl 8 Al 9 Sc ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE: Geosyntec Consultants - UT SLC 1090 L1748467 07/02/24 15:06 8 of 16 ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE: Geosyntec Consultants - UT SLC 1090 L1748467 07/02/24 15:11 8 of 16 QUALITY CONTROL SUMMARYWG2308742 Total Solids by Method 2540 G-2011 L1748467-01,02,03 Method Blank (MB) (MB) R4085065-1 06/21/24 13:10 MB Result MB Qualifier MB MDL MB RDL Analyte %%% Total Solids 0.00200 L1748467-01 Original Sample (OS) • Duplicate (DUP) (OS) L1748467-01 06/21/24 13:10 • (DUP) R4085065-3 06/21/24 13:10 Original Result DUP Result Dilution DUP RPD DUP Qualifier DUP RPD Limits Analyte %%%% Total Solids 78.1 78.2 1 0.0992 10 Laboratory Control Sample (LCS) (LCS) R4085065-2 06/21/24 13:10 Spike Amount LCS Result LCS Rec.Rec. Limits LCS Qualifier Analyte %%%% Total Solids 50.0 50.0 100 90.0-110 1 Cp 2 Tc 3 Ss 4 Cn 5 Sr 6 Qc 7 Gl 8 Al 9 Sc ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE: Geosyntec Consultants - UT SLC 1090 L1748467 07/02/24 15:06 9 of 16 ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE: Geosyntec Consultants - UT SLC 1090 L1748467 07/02/24 15:11 9 of 16 QUALITY CONTROL SUMMARYWG2308744 Total Solids by Method 2540 G-2011 L1748467-04 Method Blank (MB) (MB) R4085058-1 06/21/24 10:15 MB Result MB Qualifier MB MDL MB RDL Analyte %%% Total Solids 0.00300 L1748476-03 Original Sample (OS) • Duplicate (DUP) (OS) L1748476-03 06/21/24 10:15 • (DUP) R4085058-3 06/21/24 10:15 Original Result DUP Result Dilution DUP RPD DUP Qualifier DUP RPD Limits Analyte %%%% Total Solids 84.0 83.8 1 0.205 10 Laboratory Control Sample (LCS) (LCS) R4085058-2 06/21/24 10:15 Spike Amount LCS Result LCS Rec.Rec. Limits LCS Qualifier Analyte %%%% Total Solids 50.0 50.0 99.9 90.0-110 1 Cp 2 Tc 3 Ss 4 Cn 5 Sr 6 Qc 7 Gl 8 Al 9 Sc ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE: Geosyntec Consultants - UT SLC 1090 L1748467 07/02/24 15:06 10 of 16 ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE: Geosyntec Consultants - UT SLC 1090 L1748467 07/02/24 15:11 10 of 16 QUALITY CONTROL SUMMARYWG2311738 Volatile Organic Compounds (GC/MS) by Method 8260B L1748467-01,02,03,04 Method Blank (MB) (MB) R4086535-2 06/25/24 11:34 MB Result MB Qualifier MB MDL MB RDL Analyte mg/kg mg/kg mg/kg Benzene U 0.000467 0.00100 Toluene U 0.00130 0.00500 Ethylbenzene U 0.000737 0.00250 Total Xylenes U 0.000880 0.00650 Methyl tert-butyl ether U 0.000350 0.00100 Naphthalene U 0.00488 0.0125 (S) Toluene-d8 106 75.0-131 (S) 4-Bromofluorobenzene 101 67.0-138 (S) 1,2-Dichloroethane-d4 94.9 70.0-130 Laboratory Control Sample (LCS) (LCS) R4086535-1 06/25/24 10:18 Spike Amount LCS Result LCS Rec.Rec. Limits LCS Qualifier Analyte mg/kg mg/kg %% Benzene 0.125 0.132 106 70.0-123 Toluene 0.125 0.140 112 75.0-121 Ethylbenzene 0.125 0.148 118 74.0-126 Total Xylenes 0.375 0.444 118 72.0-127 Methyl tert-butyl ether 0.125 0.135 108 66.0-132 Naphthalene 0.125 0.112 89.6 59.0-130 (S) Toluene-d8 104 75.0-131 (S) 4-Bromofluorobenzene 101 67.0-138 (S) 1,2-Dichloroethane-d4 96.3 70.0-130 1 Cp 2 Tc 3 Ss 4 Cn 5 Sr 6 Qc 7 Gl 8 Al 9 Sc ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE: Geosyntec Consultants - UT SLC 1090 L1748467 07/02/24 15:06 11 of 16 ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE: Geosyntec Consultants - UT SLC 1090 L1748467 07/02/24 15:11 11 of 16 QUALITY CONTROL SUMMARYWG2312219 Semi-Volatile Organic Compounds (GC) by Method 8015 L1748467-01,02 Method Blank (MB) (MB) R4087628-1 06/27/24 17:10 MB Result MB Qualifier MB MDL MB RDL Analyte mg/kg mg/kg mg/kg TPH (GC/FID) High Fraction U 0.769 4.00 (S) o-Terphenyl 57.7 18.0-148 Laboratory Control Sample (LCS) (LCS) R4087628-2 06/27/24 17:22 Spike Amount LCS Result LCS Rec.Rec. Limits LCS Qualifier Analyte mg/kg mg/kg %% TPH (GC/FID) High Fraction 50.0 39.5 79.0 50.0-150 (S) o-Terphenyl 57.4 18.0-148 L1748467-02 Original Sample (OS) • Matrix Spike (MS) • Matrix Spike Duplicate (MSD) (OS) L1748467-02 06/27/24 18:49 • (MS) R4087628-3 06/27/24 19:02 • (MSD) R4087628-4 06/27/24 19:14 Spike Amount (dry) Original Result (dry)MS Result (dry)MSD Result (dry)MS Rec.MSD Rec.Dilution Rec. Limits MS Qualifier MSD Qualifier RPD RPD Limits Analyte mg/kg mg/kg mg/kg mg/kg %%%%% TPH (GC/FID) High Fraction 58.0 12.8 46.3 47.3 57.8 59.2 1 50.0-150 2.25 20 (S) o-Terphenyl 39.1 44.6 18.0-148 1 Cp 2 Tc 3 Ss 4 Cn 5 Sr 6 Qc 7 Gl 8 Al 9 Sc ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE: Geosyntec Consultants - UT SLC 1090 L1748467 07/02/24 15:06 12 of 16 ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE: Geosyntec Consultants - UT SLC 1090 L1748467 07/02/24 15:11 12 of 16 QUALITY CONTROL SUMMARYWG2313040 Semi-Volatile Organic Compounds (GC) by Method 8015 L1748467-03,04 Method Blank (MB) (MB) R4088668-1 06/30/24 22:34 MB Result MB Qualifier MB MDL MB RDL Analyte mg/kg mg/kg mg/kg TPH (GC/FID) High Fraction U 0.769 4.00 (S) o-Terphenyl 72.2 18.0-148 Laboratory Control Sample (LCS) (LCS) R4088668-2 06/30/24 22:48 Spike Amount LCS Result LCS Rec.Rec. Limits LCS Qualifier Analyte mg/kg mg/kg %% TPH (GC/FID) High Fraction 50.0 39.0 78.0 50.0-150 (S) o-Terphenyl 91.6 18.0-148 1 Cp 2 Tc 3 Ss 4 Cn 5 Sr 6 Qc 7 Gl 8 Al 9 Sc ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE: Geosyntec Consultants - UT SLC 1090 L1748467 07/02/24 15:06 13 of 16 ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE: Geosyntec Consultants - UT SLC 1090 L1748467 07/02/24 15:11 13 of 16 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 (dry)Results are reported based on the dry weight of the sample. [this will only be present on a dry report basis for soils]. MDL Method Detection Limit. MDL (dry)Method Detection Limit. RDL Reported Detection Limit. RDL (dry)Reported Detection Limit. Rec.Recovery. RPD Relative Percent Difference. SDG Sample Delivery Group. (S) Surrogate (Surrogate Standard) - Analytes added to every blank, sample, Laboratory Control Sample/Duplicate and Matrix Spike/Duplicate; used to evaluate analytical efficiency by measuring recovery. Surrogates are not expected to be detected in all environmental media. U Not detected at the Reporting Limit (or MDL where applicable). Analyte The name of the particular compound or analysis performed. Some Analyses and Methods will have multiple analytes reported. Dilution If the sample matrix contains an interfering material, the sample preparation volume or weight values differ from the standard, or if concentrations of analytes in the sample are higher than the highest limit of concentration that the laboratory can accurately report, the sample may be diluted for analysis. If a value different than 1 is used in this field, the result reported has already been corrected for this factor. Limits These are the target % recovery ranges or % difference value that the laboratory has historically determined as normal for the method and analyte being reported. Successful QC Sample analysis will target all analytes recovered or duplicated within these ranges. Original Sample The non-spiked sample in the prep batch used to determine the Relative Percent Difference (RPD) from a quality control sample. The Original Sample may not be included within the reported SDG. Qualifier This column provides a letter and/or number designation that corresponds to additional information concerning the result reported. If a Qualifier is present, a definition per Qualifier is provided within the Glossary and Definitions page and potentially a discussion of possible implications of the Qualifier in the Case Narrative if applicable. Result The actual analytical final result (corrected for any sample specific characteristics) reported for your sample. If there was no measurable result returned for a specific analyte, the result in this column may state “ND” (Not Detected) or “BDL” (Below Detectable Levels). The information in the results column should always be accompanied by either an MDL (Method Detection Limit) or RDL (Reporting Detection Limit) that defines the lowest value that the laboratory could detect or report for this analyte. Uncertainty (Radiochemistry)Confidence level of 2 sigma. Case Narrative (Cn) A brief discussion about the included sample results, including a discussion of any non-conformances to protocol observed either at sample receipt by the laboratory from the field or during the analytical process. If present, there will be a section in the Case Narrative to discuss the meaning of any data qualifiers used in the report. Quality Control Summary (Qc) This section of the report includes the results of the laboratory quality control analyses required by procedure or analytical methods to assist in evaluating the validity of the results reported for your samples. These analyses are not being performed on your samples typically, but on laboratory generated material. Sample Chain of Custody (Sc) This is the document created in the field when your samples were initially collected. This is used to verify the time and date of collection, the person collecting the samples, and the analyses that the laboratory is requested to perform. This chain of custody also documents all persons (excluding commercial shippers) that have had control or possession of the samples from the time of collection until delivery to the laboratory for analysis. Sample Results (Sr) This section of your report will provide the results of all testing performed on your samples. These results are provided by sample ID and are separated by the analyses performed on each sample. The header line of each analysis section for each sample will provide the name and method number for the analysis reported. Sample Summary (Ss)This section of the Analytical Report defines the specific analyses performed for each sample ID, including the dates and times of preparation and/or analysis. Qualifier Description J The identification of the analyte is acceptable; the reported value is an estimate. 1 Cp 2 Tc 3 Ss 4 Cn 5 Sr 6 Qc 7 Gl 8 Al 9 Sc ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE: Geosyntec Consultants - UT SLC 1090 L1748467 07/02/24 15:06 14 of 16 ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE: Geosyntec Consultants - UT SLC 1090 L1748467 07/02/24 15:11 14 of 16 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: Geosyntec Consultants - UT SLC 1090 L1748467 07/02/24 15:06 15 of 16 ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE: Geosyntec Consultants - UT SLC 1090 L1748467 07/02/24 15:11 15 of 16 ANALYTICAL REPORT July 05, 2024 Geosyntec Consultants - UT Sample Delivery Group:L1750515 Samples Received:06/26/2024 Project Number:SLC1090 Description:Wheeler Machinery Report To:Annie Brown 215 South State Street Suite 500 Salt Lake City, UT 84111 Entire Report Reviewed By: July 05, 2024 [Preliminary Report] Chris Ward Project Manager Results relate only to the items tested or calibrated and are reported as rounded values. This test report shall not be reproduced, except in full, without written approval of the laboratory. Where applicable, sampling conducted by Pace Analytical National is performed per guidance provided in laboratory standard operating procedures ENV-SOP-MTJL-0067 and ENV-SOP-MTJL-0068. Where sampling conducted by the customer, results relate to the accuracy of the information provided, and as the samples are received. Pace Analytical National 12065 Lebanon Rd Mount Juliet, TN 37122 615-758-5858 800-767-5859 mydata.pacelabs.com 1 Cp 2 Tc 3 Ss 4 Cn 5 Sr 6 Qc 7 Gl 8 Al 9 Sc ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE: Geosyntec Consultants - UT SLC1090 L1750515 07/05/24 16:13 1 of 18 July 08, 2024 Chris Ward Project Manager ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE: Geosyntec Consultants - UT SLC1090 L1750515 07/08/24 12:09 1 of 18 TABLE OF CONTENTS Cp: Cover Page 1 Tc: Table of Contents 2 Ss: Sample Summary 3 Cn: Case Narrative 4 Sr: Sample Results 5 MW-1 GW L1750515-01 5 MW-2 GW L1750515-02 6 MW-3 GW L1750515-03 7 MW-4 GW L1750515-04 8 Qc: Quality Control Summary 9 Volatile Organic Compounds (GC/MS) by Method 8260B 9 Semi-Volatile Organic Compounds (GC) by Method 3511/8015 13 Gl: Glossary of Terms 16 Al: Accreditations & Locations 17 Sc: Sample Chain of Custody 18 1 Cp 2 Tc 3 Ss 4 Cn 5 Sr 6 Qc 7 Gl 8 Al 9 Sc ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE: Geosyntec Consultants - UT SLC1090 L1750515 07/05/24 16:13 2 of 18 ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE: Geosyntec Consultants - UT SLC1090 L1750515 07/08/24 12:09 2 of 18 SAMPLE SUMMARY Collected by Collected date/time Received date/time MW-1 GW L1750515-01 GW Annie Brown 06/25/24 08:55 06/26/24 08:00 Method Batch Dilution Preparation Analysis Analyst Location date/time date/time Volatile Organic Compounds (GC/MS) by Method 8260B WG2314986 1 06/30/24 22:51 06/30/24 22:51 DYW Mt. Juliet, TN Volatile Organic Compounds (GC/MS) by Method 8260B WG2316459 1 07/03/24 10:12 07/03/24 10:12 DYW Mt. Juliet, TN Semi-Volatile Organic Compounds (GC) by Method 3511/8015 WG2315549 1 07/02/24 11:48 07/03/24 07:54 DMG Mt. Juliet, TN Collected by Collected date/time Received date/time MW-2 GW L1750515-02 GW Annie Brown 06/25/24 11:10 06/26/24 08:00 Method Batch Dilution Preparation Analysis Analyst Location date/time date/time Volatile Organic Compounds (GC/MS) by Method 8260B WG2315089 1 07/01/24 23:22 07/01/24 23:22 DYW Mt. Juliet, TN Semi-Volatile Organic Compounds (GC) by Method 3511/8015 WG2317184 1 07/04/24 07:32 07/05/24 08:41 DMG Mt. Juliet, TN Collected by Collected date/time Received date/time MW-3 GW L1750515-03 GW Annie Brown 06/25/24 12:40 06/26/24 08:00 Method Batch Dilution Preparation Analysis Analyst Location date/time date/time Volatile Organic Compounds (GC/MS) by Method 8260B WG2315089 1 07/01/24 23:44 07/01/24 23:44 DYW Mt. Juliet, TN Semi-Volatile Organic Compounds (GC) by Method 3511/8015 WG2315365 1 07/01/24 14:47 07/01/24 21:35 DMG Mt. Juliet, TN Collected by Collected date/time Received date/time MW-4 GW L1750515-04 GW Annie Brown 06/25/24 13:45 06/26/24 08:00 Method Batch Dilution Preparation Analysis Analyst Location date/time date/time Volatile Organic Compounds (GC/MS) by Method 8260B WG2315089 1 07/02/24 00:05 07/02/24 00:05 DYW Mt. Juliet, TN Semi-Volatile Organic Compounds (GC) by Method 3511/8015 WG2315365 1 07/01/24 14:47 07/01/24 21:55 DMG 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: Geosyntec Consultants - UT SLC1090 L1750515 07/05/24 16:13 3 of 18 ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE: Geosyntec Consultants - UT SLC1090 L1750515 07/08/24 12:09 3 of 18 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] Chris Ward 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: Geosyntec Consultants - UT SLC1090 L1750515 07/05/24 16:13 4 of 18 Chris Ward Project Manager ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE: Geosyntec Consultants - UT SLC1090 L1750515 07/08/24 12:09 4 of 18 SAMPLE RESULTS - 01 L1750515 MW-1 GW Collected date/time: 06/25/24 08:55 Volatile Organic Compounds (GC/MS) by Method 8260B Result Qualifier MDL RDL Dilution Analysis Batch Analyte mg/l mg/l mg/l date / time TPH (GC/MS) Low Fraction U 0.108 0.500 1 06/30/2024 22:51 WG2314986 Benzene U 0.0000941 0.00100 1 07/03/2024 10:12 WG2316459 Ethylbenzene U 0.000137 0.00100 1 06/30/2024 22:51 WG2314986 Methyl tert-butyl ether U 0.000101 0.00100 1 06/30/2024 22:51 WG2314986 Naphthalene U 0.00100 0.00500 1 06/30/2024 22:51 WG2314986 Toluene U 0.000278 0.00100 1 07/03/2024 10:12 WG2316459 Xylenes, Total U 0.000174 0.00300 1 07/03/2024 10:12 WG2316459 (S) Toluene-d8 100 80.0-120 06/30/2024 22:51 WG2314986 (S) Toluene-d8 104 80.0-120 07/03/2024 10:12 WG2316459 (S) 4-Bromofluorobenzene 94.3 77.0-126 06/30/2024 22:51 WG2314986 (S) 4-Bromofluorobenzene 102 77.0-126 07/03/2024 10:12 WG2316459 (S) 1,2-Dichloroethane-d4 111 70.0-130 06/30/2024 22:51 WG2314986 (S) 1,2-Dichloroethane-d4 111 70.0-130 07/03/2024 10:12 WG2316459 Semi-Volatile Organic Compounds (GC) by Method 3511/8015 Result Qualifier MDL RDL Dilution Analysis Batch Analyte mg/l mg/l mg/l date / time TPH (GC/FID) High Fraction 0.796 0.0247 0.100 1 07/03/2024 07:54 WG2315549 (S) o-Terphenyl 65.5 52.0-156 07/03/2024 07:54 WG2315549 1 Cp 2 Tc 3 Ss 4 Cn 5 Sr 6 Qc 7 Gl 8 Al 9 Sc ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE: Geosyntec Consultants - UT SLC1090 L1750515 07/05/24 16:13 5 of 18 ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE: Geosyntec Consultants - UT SLC1090 L1750515 07/08/24 12:09 5 of 18 SAMPLE RESULTS - 02 L1750515 MW-2 GW Collected date/time: 06/25/24 11:10 Volatile Organic Compounds (GC/MS) by Method 8260B Result Qualifier MDL RDL Dilution Analysis Batch Analyte mg/l mg/l mg/l date / time TPH (GC/MS) Low Fraction U 0.108 0.500 1 07/01/2024 23:22 WG2315089 Benzene 0.000130 J 0.0000941 0.00100 1 07/01/2024 23:22 WG2315089 Ethylbenzene U 0.000137 0.00100 1 07/01/2024 23:22 WG2315089 Methyl tert-butyl ether U 0.000101 0.00100 1 07/01/2024 23:22 WG2315089 Naphthalene U 0.00100 0.00500 1 07/01/2024 23:22 WG2315089 Toluene U 0.000278 0.00100 1 07/01/2024 23:22 WG2315089 Xylenes, Total U 0.000174 0.00300 1 07/01/2024 23:22 WG2315089 (S) Toluene-d8 107 80.0-120 07/01/2024 23:22 WG2315089 (S) 4-Bromofluorobenzene 99.8 77.0-126 07/01/2024 23:22 WG2315089 (S) 1,2-Dichloroethane-d4 101 70.0-130 07/01/2024 23:22 WG2315089 Semi-Volatile Organic Compounds (GC) by Method 3511/8015 Result Qualifier MDL RDL Dilution Analysis Batch Analyte mg/l mg/l mg/l date / time TPH (GC/FID) High Fraction 1.34 0.0247 0.100 1 07/05/2024 08:41 WG2317184 (S) o-Terphenyl 62.6 52.0-156 07/05/2024 08:41 WG2317184 1 Cp 2 Tc 3 Ss 4 Cn 5 Sr 6 Qc 7 Gl 8 Al 9 Sc ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE: Geosyntec Consultants - UT SLC1090 L1750515 07/05/24 16:13 6 of 18 ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE: Geosyntec Consultants - UT SLC1090 L1750515 07/08/24 12:09 6 of 18 SAMPLE RESULTS - 03 L1750515 MW-3 GW Collected date/time: 06/25/24 12:40 Volatile Organic Compounds (GC/MS) by Method 8260B Result Qualifier MDL RDL Dilution Analysis Batch Analyte mg/l mg/l mg/l date / time TPH (GC/MS) Low Fraction U 0.108 0.500 1 07/01/2024 23:44 WG2315089 Benzene U 0.0000941 0.00100 1 07/01/2024 23:44 WG2315089 Ethylbenzene U 0.000137 0.00100 1 07/01/2024 23:44 WG2315089 Methyl tert-butyl ether U 0.000101 0.00100 1 07/01/2024 23:44 WG2315089 Naphthalene U 0.00100 0.00500 1 07/01/2024 23:44 WG2315089 Toluene U 0.000278 0.00100 1 07/01/2024 23:44 WG2315089 Xylenes, Total U 0.000174 0.00300 1 07/01/2024 23:44 WG2315089 (S) Toluene-d8 107 80.0-120 07/01/2024 23:44 WG2315089 (S) 4-Bromofluorobenzene 101 77.0-126 07/01/2024 23:44 WG2315089 (S) 1,2-Dichloroethane-d4 100 70.0-130 07/01/2024 23:44 WG2315089 Semi-Volatile Organic Compounds (GC) by Method 3511/8015 Result Qualifier MDL RDL Dilution Analysis Batch Analyte mg/l mg/l mg/l date / time TPH (GC/FID) High Fraction 0.301 0.0247 0.100 1 07/01/2024 21:35 WG2315365 (S) o-Terphenyl 84.2 52.0-156 07/01/2024 21:35 WG2315365 1 Cp 2 Tc 3 Ss 4 Cn 5 Sr 6 Qc 7 Gl 8 Al 9 Sc ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE: Geosyntec Consultants - UT SLC1090 L1750515 07/05/24 16:13 7 of 18 ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE: Geosyntec Consultants - UT SLC1090 L1750515 07/08/24 12:09 7 of 18 SAMPLE RESULTS - 04 L1750515 MW-4 GW Collected date/time: 06/25/24 13:45 Volatile Organic Compounds (GC/MS) by Method 8260B Result Qualifier MDL RDL Dilution Analysis Batch Analyte mg/l mg/l mg/l date / time TPH (GC/MS) Low Fraction U 0.108 0.500 1 07/02/2024 00:05 WG2315089 Benzene U 0.0000941 0.00100 1 07/02/2024 00:05 WG2315089 Ethylbenzene U 0.000137 0.00100 1 07/02/2024 00:05 WG2315089 Methyl tert-butyl ether U 0.000101 0.00100 1 07/02/2024 00:05 WG2315089 Naphthalene U 0.00100 0.00500 1 07/02/2024 00:05 WG2315089 Toluene U 0.000278 0.00100 1 07/02/2024 00:05 WG2315089 Xylenes, Total U 0.000174 0.00300 1 07/02/2024 00:05 WG2315089 (S) Toluene-d8 109 80.0-120 07/02/2024 00:05 WG2315089 (S) 4-Bromofluorobenzene 101 77.0-126 07/02/2024 00:05 WG2315089 (S) 1,2-Dichloroethane-d4 104 70.0-130 07/02/2024 00:05 WG2315089 Semi-Volatile Organic Compounds (GC) by Method 3511/8015 Result Qualifier MDL RDL Dilution Analysis Batch Analyte mg/l mg/l mg/l date / time TPH (GC/FID) High Fraction 0.348 0.0247 0.100 1 07/01/2024 21:55 WG2315365 (S) o-Terphenyl 86.3 52.0-156 07/01/2024 21:55 WG2315365 1 Cp 2 Tc 3 Ss 4 Cn 5 Sr 6 Qc 7 Gl 8 Al 9 Sc ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE: Geosyntec Consultants - UT SLC1090 L1750515 07/05/24 16:13 8 of 18 ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE: Geosyntec Consultants - UT SLC1090 L1750515 07/08/24 12:09 8 of 18 QUALITY CONTROL SUMMARYWG2314986 Volatile Organic Compounds (GC/MS) by Method 8260B L1750515-01 Method Blank (MB) (MB) R4089396-4 06/30/24 21:04 MB Result MB Qualifier MB MDL MB RDL Analyte mg/l mg/l mg/l TPH (GC/MS) Low Fraction U 0.108 0.500 Ethylbenzene U 0.000137 0.00100 Methyl tert-butyl ether U 0.000101 0.00100 Naphthalene U 0.00100 0.00500 (S) Toluene-d8 98.4 80.0-120 (S) 4-Bromofluorobenzene 88.8 77.0-126 (S) 1,2-Dichloroethane-d4 115 70.0-130 Laboratory Control Sample (LCS) • Laboratory Control Sample Duplicate (LCSD) (LCS) R4089396-1 06/30/24 18:22 • (LCSD) R4089396-2 06/30/24 18:43 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 %%%%% Ethylbenzene 0.00500 0.00403 0.00452 80.6 90.4 79.0-123 11.5 20 Methyl tert-butyl ether 0.00500 0.00475 0.00504 95.0 101 68.0-125 5.92 20 Naphthalene 0.00500 0.00374 0.00413 74.8 82.6 54.0-135 J J 9.91 20 (S) Toluene-d8 96.2 98.8 80.0-120 (S) 4-Bromofluorobenzene 90.7 92.7 77.0-126 (S) 1,2-Dichloroethane-d4 114 113 70.0-130 Laboratory Control Sample (LCS) (LCS) R4089396-3 06/30/24 19:26 Spike Amount LCS Result LCS Rec.Rec. Limits LCS Qualifier Analyte mg/l mg/l %% TPH (GC/MS) Low Fraction 5.00 4.49 89.8 66.0-132 (S) Toluene-d8 97.1 80.0-120 (S) 4-Bromofluorobenzene 93.5 77.0-126 (S) 1,2-Dichloroethane-d4 114 70.0-130 L1750339-10 Original Sample (OS) • Matrix Spike (MS) • Matrix Spike Duplicate (MSD) (OS) L1750339-10 07/01/24 04:11 • (MS) R4089396-5 07/01/24 04:32 • (MSD) R4089396-6 07/01/24 04:54 Spike Amount Original Result MS Result MSD Result MS Rec.MSD Rec.Dilution Rec. Limits MS Qualifier MSD Qualifier RPD RPD Limits Analyte mg/l mg/l mg/l mg/l %%%%% Ethylbenzene 1.00 1.72 2.84 3.05 112 133 200 30.0-155 7.13 27 Methyl tert-butyl ether 1.00 U 1.15 1.19 115 119 200 28.0-150 3.42 29 Naphthalene 1.00 0.319 1.40 1.41 108 109 200 12.0-156 0.712 35 (S) Toluene-d8 92.6 97.3 80.0-120 1 Cp 2 Tc 3 Ss 4 Cn 5 Sr 6 Qc 7 Gl 8 Al 9 Sc ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE: Geosyntec Consultants - UT SLC1090 L1750515 07/05/24 16:13 9 of 18 ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE: Geosyntec Consultants - UT SLC1090 L1750515 07/08/24 12:09 9 of 18 QUALITY CONTROL SUMMARYWG2314986 Volatile Organic Compounds (GC/MS) by Method 8260B L1750515-01 L1750339-10 Original Sample (OS) • Matrix Spike (MS) • Matrix Spike Duplicate (MSD) (OS) L1750339-10 07/01/24 04:11 • (MS) R4089396-5 07/01/24 04:32 • (MSD) R4089396-6 07/01/24 04:54 Spike Amount Original Result MS Result MSD Result MS Rec.MSD Rec.Dilution Rec. Limits MS Qualifier MSD Qualifier RPD RPD Limits Analyte mg/l mg/l mg/l mg/l %%%%% (S) 4-Bromofluorobenzene 91.2 93.9 77.0-126 (S) 1,2-Dichloroethane-d4 114 113 70.0-130 L1750339-10 Original Sample (OS) • Matrix Spike (MS) • Matrix Spike Duplicate (MSD) (OS) L1750339-10 07/01/24 04:11 • (MS) R4089396-7 07/01/24 05:15 • (MSD) R4089396-8 07/01/24 05:37 Spike Amount Original Result MS Result MSD Result MS Rec.MSD Rec.Dilution Rec. Limits MS Qualifier MSD Qualifier RPD RPD Limits Analyte mg/l mg/l mg/l mg/l %%%%% TPH (GC/MS) Low Fraction 1000 156 1310 1350 115 119 200 10.0-160 3.01 40 (S) Toluene-d8 95.1 97.4 80.0-120 (S) 4-Bromofluorobenzene 98.6 98.6 77.0-126 (S) 1,2-Dichloroethane-d4 117 112 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: Geosyntec Consultants - UT SLC1090 L1750515 07/05/24 16:13 10 of 18 ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE: Geosyntec Consultants - UT SLC1090 L1750515 07/08/24 12:09 10 of 18 QUALITY CONTROL SUMMARYWG2315089 Volatile Organic Compounds (GC/MS) by Method 8260B L1750515-02,03,04 Method Blank (MB) (MB) R4089278-3 07/01/24 22:04 MB Result MB Qualifier MB MDL MB RDL Analyte mg/l mg/l mg/l TPH (GC/MS) Low Fraction U 0.108 0.500 Benzene U 0.0000941 0.00100 Ethylbenzene U 0.000137 0.00100 Methyl tert-butyl ether U 0.000101 0.00100 Naphthalene U 0.00100 0.00500 Toluene U 0.000278 0.00100 Xylenes, Total U 0.000174 0.00300 (S) Toluene-d8 108 80.0-120 (S) 4-Bromofluorobenzene 105 77.0-126 (S) 1,2-Dichloroethane-d4 96.9 70.0-130 Laboratory Control Sample (LCS) (LCS) R4089278-1 07/01/24 21:00 Spike Amount LCS Result LCS Rec.Rec. Limits LCS Qualifier Analyte mg/l mg/l %% Benzene 0.00500 0.00462 92.4 70.0-123 Ethylbenzene 0.00500 0.00509 102 79.0-123 Methyl tert-butyl ether 0.00500 0.00450 90.0 68.0-125 Naphthalene 0.00500 0.00377 75.4 54.0-135 J Toluene 0.00500 0.00502 100 79.0-120 Xylenes, Total 0.0150 0.0149 99.3 79.0-123 (S) Toluene-d8 105 80.0-120 (S) 4-Bromofluorobenzene 104 77.0-126 (S) 1,2-Dichloroethane-d4 102 70.0-130 Laboratory Control Sample (LCS) (LCS) R4089278-2 07/01/24 21:21 Spike Amount LCS Result LCS Rec.Rec. Limits LCS Qualifier Analyte mg/l mg/l %% TPH (GC/MS) Low Fraction 5.00 5.25 105 66.0-132 (S) Toluene-d8 101 80.0-120 (S) 4-Bromofluorobenzene 107 77.0-126 (S) 1,2-Dichloroethane-d4 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: Geosyntec Consultants - UT SLC1090 L1750515 07/05/24 16:13 11 of 18 ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE: Geosyntec Consultants - UT SLC1090 L1750515 07/08/24 12:09 11 of 18 QUALITY CONTROL SUMMARYWG2316459 Volatile Organic Compounds (GC/MS) by Method 8260B L1750515-01 Method Blank (MB) (MB) R4090368-4 07/03/24 04:43 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 Xylenes, Total U 0.000174 0.00300 (S) Toluene-d8 108 80.0-120 (S) 4-Bromofluorobenzene 104 77.0-126 (S) 1,2-Dichloroethane-d4 114 70.0-130 Laboratory Control Sample (LCS) • Laboratory Control Sample Duplicate (LCSD) (LCS) R4090368-1 07/03/24 03:21 • (LCSD) R4090368-2 07/03/24 03:41 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 0.00443 0.00463 88.6 92.6 70.0-123 4.42 20 Toluene 0.00500 0.00444 0.00464 88.8 92.8 79.0-120 4.41 20 Xylenes, Total 0.0150 0.0135 0.0149 90.0 99.3 79.0-123 9.86 20 (S) Toluene-d8 102 102 80.0-120 (S) 4-Bromofluorobenzene 102 102 77.0-126 (S) 1,2-Dichloroethane-d4 114 116 70.0-130 1 Cp 2 Tc 3 Ss 4 Cn 5 Sr 6 Qc 7 Gl 8 Al 9 Sc ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE: Geosyntec Consultants - UT SLC1090 L1750515 07/05/24 16:13 12 of 18 ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE: Geosyntec Consultants - UT SLC1090 L1750515 07/08/24 12:09 12 of 18 QUALITY CONTROL SUMMARYWG2315365 Semi-Volatile Organic Compounds (GC) by Method 3511/8015 L1750515-03,04 Method Blank (MB) (MB) R4088957-1 07/01/24 20:14 MB Result MB Qualifier MB MDL MB RDL Analyte mg/l mg/l mg/l TPH (GC/FID) High Fraction 0.0254 J 0.0247 0.100 (S) o-Terphenyl 86.0 52.0-156 Laboratory Control Sample (LCS) • Laboratory Control Sample Duplicate (LCSD) (LCS) R4088957-2 07/01/24 20:36 • (LCSD) R4088957-3 07/01/24 20:56 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 1.51 1.48 101 98.7 50.0-150 2.01 20 (S) o-Terphenyl 88.0 80.5 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: Geosyntec Consultants - UT SLC1090 L1750515 07/05/24 16:13 13 of 18 ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE: Geosyntec Consultants - UT SLC1090 L1750515 07/08/24 12:09 13 of 18 QUALITY CONTROL SUMMARYWG2315549 Semi-Volatile Organic Compounds (GC) by Method 3511/8015 L1750515-01 Method Blank (MB) (MB) R4089431-3 07/02/24 19:36 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 72.0 52.0-156 Laboratory Control Sample (LCS) • Laboratory Control Sample Duplicate (LCSD) (LCS) R4089431-2 07/02/24 19:16 • (LCSD) R4089431-1 07/02/24 18:56 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 1.44 1.54 96.0 103 50.0-150 6.71 20 (S) o-Terphenyl 75.0 78.0 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: Geosyntec Consultants - UT SLC1090 L1750515 07/05/24 16:13 14 of 18 ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE: Geosyntec Consultants - UT SLC1090 L1750515 07/08/24 12:09 14 of 18 QUALITY CONTROL SUMMARYWG2317184 Semi-Volatile Organic Compounds (GC) by Method 3511/8015 L1750515-02 Method Blank (MB) (MB) R4090207-1 07/04/24 17:49 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 70.0 52.0-156 Laboratory Control Sample (LCS) • Laboratory Control Sample Duplicate (LCSD) (LCS) R4090207-2 07/04/24 18:09 • (LCSD) R4090207-3 07/04/24 18:30 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 1.51 1.49 101 99.3 50.0-150 1.33 20 (S) o-Terphenyl 68.5 69.0 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: Geosyntec Consultants - UT SLC1090 L1750515 07/05/24 16:13 15 of 18 ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE: Geosyntec Consultants - UT SLC1090 L1750515 07/08/24 12:09 15 of 18 GLOSSARY OF TERMS Guide to Reading and Understanding Your Laboratory Report The information below is designed to better explain the various terms used in your report of analytical results from the Laboratory. This is not intended as a comprehensive explanation, and if you have additional questions please contact your project representative. Results Disclaimer - Information that may be provided by the customer, and contained within this report, include Permit Limits, Project Name, Sample ID, Sample Matrix, Sample Preservation, Field Blanks, Field Spikes, Field Duplicates, On-Site Data, Sampling Collection Dates/Times, and Sampling Location. Results relate to the accuracy of this information provided, and as the samples are received. Abbreviations and Definitions MDL Method Detection Limit. RDL Reported Detection Limit. Rec.Recovery. RPD Relative Percent Difference. SDG Sample Delivery Group. (S) Surrogate (Surrogate Standard) - Analytes added to every blank, sample, Laboratory Control Sample/Duplicate and Matrix Spike/Duplicate; used to evaluate analytical efficiency by measuring recovery. Surrogates are not expected to be detected in all environmental media. U Not detected at the Reporting Limit (or MDL where applicable). Analyte The name of the particular compound or analysis performed. Some Analyses and Methods will have multiple analytes reported. Dilution If the sample matrix contains an interfering material, the sample preparation volume or weight values differ from the standard, or if concentrations of analytes in the sample are higher than the highest limit of concentration that the laboratory can accurately report, the sample may be diluted for analysis. If a value different than 1 is used in this field, the result reported has already been corrected for this factor. Limits These are the target % recovery ranges or % difference value that the laboratory has historically determined as normal for the method and analyte being reported. Successful QC Sample analysis will target all analytes recovered or duplicated within these ranges. Original Sample The non-spiked sample in the prep batch used to determine the Relative Percent Difference (RPD) from a quality control sample. The Original Sample may not be included within the reported SDG. Qualifier This column provides a letter and/or number designation that corresponds to additional information concerning the result reported. If a Qualifier is present, a definition per Qualifier is provided within the Glossary and Definitions page and potentially a discussion of possible implications of the Qualifier in the Case Narrative if applicable. Result The actual analytical final result (corrected for any sample specific characteristics) reported for your sample. If there was no measurable result returned for a specific analyte, the result in this column may state “ND” (Not Detected) or “BDL” (Below Detectable Levels). The information in the results column should always be accompanied by either an MDL (Method Detection Limit) or RDL (Reporting Detection Limit) that defines the lowest value that the laboratory could detect or report for this analyte. Uncertainty (Radiochemistry)Confidence level of 2 sigma. Case Narrative (Cn) A brief discussion about the included sample results, including a discussion of any non-conformances to protocol observed either at sample receipt by the laboratory from the field or during the analytical process. If present, there will be a section in the Case Narrative to discuss the meaning of any data qualifiers used in the report. Quality Control Summary (Qc) This section of the report includes the results of the laboratory quality control analyses required by procedure or analytical methods to assist in evaluating the validity of the results reported for your samples. These analyses are not being performed on your samples typically, but on laboratory generated material. Sample Chain of Custody (Sc) This is the document created in the field when your samples were initially collected. This is used to verify the time and date of collection, the person collecting the samples, and the analyses that the laboratory is requested to perform. This chain of custody also documents all persons (excluding commercial shippers) that have had control or possession of the samples from the time of collection until delivery to the laboratory for analysis. Sample Results (Sr) This section of your report will provide the results of all testing performed on your samples. These results are provided by sample ID and are separated by the analyses performed on each sample. The header line of each analysis section for each sample will provide the name and method number for the analysis reported. Sample Summary (Ss)This section of the Analytical Report defines the specific analyses performed for each sample ID, including the dates and times of preparation and/or analysis. Qualifier Description J The identification of the analyte is acceptable; the reported value is an estimate. 1 Cp 2 Tc 3 Ss 4 Cn 5 Sr 6 Qc 7 Gl 8 Al 9 Sc ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE: Geosyntec Consultants - UT SLC1090 L1750515 07/05/24 16:13 16 of 18 ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE: Geosyntec Consultants - UT SLC1090 L1750515 07/08/24 12:09 16 of 18 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: Geosyntec Consultants - UT SLC1090 L1750515 07/05/24 16:13 17 of 18 ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE: Geosyntec Consultants - UT SLC1090 L1750515 07/08/24 12:09 17 of 18