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Home My WebLink AboutDERR-2025-008672 WASATCH ENVIRONMENTAL, INC. ENVIRONMENTAL SCIENCE AND ENGINEERING 2410 WEST CALIFORNIA AVENUE SALT LAKE CITY, UTAH 84104 PHONE (801) 972-8400 e-mail: wei@wasatch-environmental.com www.wasatch-environmental.com REVISED SITE CHARACTERIZATION WORK PLAN 1300 SOUTH SLC PROPERTY 1215 S. 400 W., 1225 S. 400 W, and 390 W. 1300 S. SALT LAKE CITY, UTAH VOLUNTARY CLEANUP PROGRAM SITE #140 Project No. 2779-003D Prepared for: Utah Department of Environmental Quality Division of Environmental Response and Remediation Voluntary Cleanup Program Mr. Bill Rees, Section Manager 195 North 1950 West Salt Lake City, Utah 84114 Prepared by: Wasatch Environmental, Inc. 2410 West California Avenue Salt Lake City, Utah 84104 November 14, 2025 Revised Site Characterization Work Plan 1300 SOUTH SLC PROPERTY Wasatch Environmental, Inc. 1 REVISED SITE CHARACTERIZATION WORK PLAN 1300 SOUTH SLC PROPERTY 1215 S. 400 W., 1225 S. 400 W, AND 390 W. 1300 S. SALT LAKE CITY, UTAH VOLUNTARY CLEANUP PROGRAM SITE #140 1. INTRODUCTION This revised Site Characterization Work Plan (SCWP) describes the environmental sampling activities anticipated to be completed at the 1300 South SLC property (Site) located at 1215 S. 400 W., 1225 S. 400 W, and 390 W. 1300 S. located in Salt Lake City, Utah. As of September 17, 2025, the Site has been accepted into the Utah Voluntary Cleanup Program (VCP) to address environmental impacts identified in the soil and groundwater at the Site. The Site has been assigned as VCP #C140. See Figure 1 for a Site Location Map. All work completed for the SCWP will be used in conjunction with the Quality Assurance Project Plan (QAPP) and the Sampling and Analysis Plan (SAP) prepared for the Site to be approved by the VCP. All personnel involved with the collection and handling of environmental samples shall be required to read this plan, and a copy of this plan will be available in the field during all sampling activities. 2. BACKGROUND The Site is located at 1215 S. 400 W., 1225 S. 400 W., and 390 W. 1300 S. in Salt Lake City, Utah (as shown on Figure 1). The Site consists of 0.80 acres and is developed with a single -story 9,594- square-foot building located in the northern portion, a single-story 2,280-square-foot building located in the central portion, and a single-story, 2,400-square-foot building located in the southern portion. The northern and central buildings are occupied by A.W. Fors Machine & Welding Shop, a machine shop, and the southern building is occupied by Wasatch Equipment Sales and Service, a food packaging equipment service provider. The Site is comprised of four parcels. The Site includes the following Salt Lake County Assessor’s Office parcel numbers: 15-12-382-001, 15-12-382-002, 15-12- 382-013, and 15-12-382-007. Current property use in the near vicinity of the Site is a mix of commercial, transportation corridors, storage yards, light industrial and some residential. Property use at the Site and surrounding properties is a mix of commercial, light industrial, and limited residential. Our research indicates that the Site was vacant land with no structures as early as 1937. The current southwestern (Wasatch Equipment) building was originally constructed in 1958 and has historically been occupied by automotive repair shops and the current equipment service provider. The current northern (northern A.W. Fors) building was constructed in 1975 to replace former structures in this area and has been occupied by the current machine shop since that time. The current east -central (southern A.W. Fors) building was originally constructed in 1965 and has been occupied by the current machine shop since that time. Mr. Jason Martin, representative of the proposed purchaser of the Site, provided Wasatch with a May 23, 2024, Phase I Environmental Site Assessment prepared by Gordon Geotechnical Engineering, Inc., (Gordon Geotechnical) for the Site on behalf of Chelsea Investment Corporation. The May 2024 Phase I Environmental Site Assessment identified the likely presence of releases to the environment from the long-term use of the Site for automotive repair and as a machine shop as a recognized environmental condition. Additionally, potential impacts from nearby properties identified on the database report were identified as recognized environmental conditions in the 2024 report. Based on the findings of the 2024 report, multiple rounds of subsurface investigations and sampling were subsequently performed at the Site by Wasatch. Revised Site Characterization Work Plan 1300 SOUTH SLC PROPERTY Wasatch Environmental, Inc. 2 The analytical results from the subsurface investigations conducted on the Site indicated that benzene, perfluorooctanoic acid (PFOA), and tetrachloroethene (PCE) impacts to groundwater; total recoverable petroleum hydrocarbons (TRPH) and perfluorooctane sulfonate (PFOS) impacts to soil and groundwater; and PCE and trichloroethene (TCE) impacts to soil gas were discovered at the Site. PFOA and PFOS are analytes associated with per- and poly fluoroalkyl substances (PFAS). Given that the benzene and PFAS concentrations were higher in the groundwater samples collected along the eastern (hydraulically upgradient) boundary of the Site relative to the benzene and PFAS concentrations detected in the groundwater samples collected more hydraulically downgradient, it is Wasatch’s and the Applicant’s opinion that these impacts are likely migrating onto the Site from an off-Site source to the east and likely do not originate from an on-Site source. However, further data is required to verify these opinions. Given the presence of chlorinated solvent impacted groundwater and soil gas on the Site beneath the current structures, a vapor intrusion risk is present. Wasatch recommended the installation of vapor mitigation systems within the current Site structures and future structures to reduce potential future health risks to indoor occupants. If the future planned use of the Site changes, and in the event any on-Site structures are to be demolished, Wasatch recommended an environmental professional be present at the Site to evaluate the soil beneath the building for impacts that could be present. Wasatch recommended that these impacts be reported to the Utah Department of Environmental Quality (DEQ) VCP for regulatory oversight and guidance to achieve closure of the releases that would facilitate redevelopment of the Site for residential use. See Figure 2 for a historical sample location map, see Figure 3 for a soil gas exceedance map, see Figure 4 for a groundwater exceedance map, and see Figure 5 for a potentiometric surface map. The impacts at the Site have been reported to the Utah DEQ by submitting an application for an Enforceable Written Assurance (EWA) to the Utah VCP. Wasatch has submitted a VCP application and were accepted into the VCP. In a pre-application meeting the VCP stated that additional investigation would be required prior to completing a Remedial Action Plan (RAP). 3. OBJECTIVES The objective of the work described in this SCWP is to collect data of sufficient quantity, quality, and distribution to provide an understanding of the nature of the contamination, and to define the lateral and vertical extent of contamination present in environmental media related to the release Site. Site characterization must be sufficient both to understand the exposure risks associated with the contamination, as well to evaluate and implement appropriate remediation and mitigation measures. 4. SCOPE OF PROPOSED WORK Wasatch is proposing the following tasks to accomplish the objectives stated above. Task 1: Project Management Task 1 includes management and oversight of the execution of the work, preparation of the work plan, identifying subcontractors and obtaining estimates for subcontracted work (if required), preparing a cost estimate for the Client, and authoring access agreements. Finally, this task includes regulatory support. Task 2: Site Characterization Wasatch will ensure that the procedures presented in the project planning documents (i.e., Health and Safety Plan [HASP]) are followed by all on-Site workers. All Site workers will be required to have Revised Site Characterization Work Plan 1300 SOUTH SLC PROPERTY Wasatch Environmental, Inc. 3 current Occupational Safety and Health Administration (OSHA), Hazardous Waste Operations (HAZWOPER) training. Task 2a: Further Define the Extent and Degree of Volatile Organic Compounds (VOCs) and metals impacts Task 2a will include several related subtasks to further evaluate and define the areal and vertical extent of impacts. VOC impacts have been identified on the northern and southern portion of the Site. Additionally, heavy metals including hexavalent chromium will also be evaluated at the Site. First, a drilling subcontractor will be secured to complete 14 soil borings to a depth of 15 feet below ground surface (bgs). See Figure 2 for the proposed boring locations. The soil borings will be advanced in 5-foot increments using the GeoProbe 7822 DT drill rig using direct-push drilling techniques. Soil cores collected from the direct-push borings will be collected from 5-foot long by 1.5-inch diameter discrete interval push samplers equipped with disposable polybutyrate liners. Soil cores will be field screened with a MiniRae 3000 photoionization detector (PID) equipped with a 10.6 electronvolt lamp. The soil cores will be field logged by an experienced geologist. Two soil samples will be collected from each boring and analyzed for VOCs, Resource Conservation and Recovery Act (RCRA) D-list metals, and hexavalent chromium; except from borings GP-26, GP- 30, and GP-31 which are not located in a suspected source area; therefore, no soil samples will be collected from these areas. Also, boring GP-28, to be completed in an oil-stained area, will also be analyzed for polycyclic aromatic hydrocarbons (PAHs). Additionally, given that RCRA D-list metals and VOCs have already been collected from borings GP-2 and GP-3, no RCRA D-list metals or VOC soil samples will be collected from borings GP-23 and GP-25. These borings are to be completed to evaluate for hexavalent chromium only in these areas. See Table 1 for a summary of proposed sample analysis per boring. The upper soil sample will be collected from the depth interval exhibiting the greatest field indications of impacts (i.e., odors, elevated PID readings, and soil staining). The lower soil sample will be collected from a depth interval that appears based on field indications to be located below the contamination, if present. All lower soil samples will be placed on hold and only analyzed if the upper soil samples exhibit concentrations that exceed applicable screening levels. If no indications of impacts are observed, a soil sample will be collected just above the vadose zone/saturated zone interface. Wasatch will ensure that all lower soil samples that need to be analyzed are analyzed within their applicable hold times. If soil impacts are discovered in borings that impacts were not anticipated, Wasatch will collect appropriate soil samples and coordinate with the client and the VCP to determine what constituents to analyze. The soil samples collected for analysis of VOCs will be collected using a laboratory -supplied sampling device, sample preservation methods, and sample containers consistent with U.S. EPA Method 5035A for the collection of VOCs. Soil samples will be collected from each sample interval for both low-range (0.5 to 250 µg/kg) and high-range (>250 µg/kg) laboratory analysis for VOCs. Low-range soil samples will be collected as 5-g aliquots and placed in laboratory-supplied, unpreserved volatile organic analysis (VOA) bottles, and immediately placed in a cooler with dry ice. High-range samples will be collected as 10g-aliquots and placed in laboratory-supplied VOA bottles preserved with methanol and immediately placed in a cooler with ice. All soil samples collected from metals analysis will be collected into 4-ounce glass jars. All soil samples will be immediately placed on ice in a sample cooler and delivered under chain-of-custody protocol to Pace Analytical (Pace) for analysis of VOCs by United States Environmental Protection Agency (U.S. EPA) Method 8260D, PAHs by U.S. EPA Method 8270E with select ion monitoring (SIM), and RCRA D-list metals by U.S. EPA Method 6020B/7174B. Additionally, the soil samples to be analyzed for hexavalent chromium by U.S. EPA Method 7199 will be shipped to Eurofins Test America (Eurofins). Wasatch would request a laboratory quality control (QC) level III for the samples collected. Revised Site Characterization Work Plan 1300 SOUTH SLC PROPERTY Wasatch Environmental, Inc. 4 One groundwater sample will be collected from each of the borings. All groundwater samples will be analyzed for VOCs, except for groundwater samples collected from borings GP-23 and GP-25. All groundwater samples will be analyzed for RCRA D-list metals, except for groundwater samples collected from borings GP-23 and GP-25. All groundwater samples will be analyzed for hexavalent chromium except from borings GP-30 and GP-31. Additionally, groundwater samples collected from borings GP-30 and GP-31 will be analyzed for PFAS and the groundwater sample collected from boring GP-28 will be analyzed for SVOCs. See Table 1 for a summary of sample analysis per boring. Groundwater samples collected for VOCs will be collected into three, hydrochloric acid preserved, 40 - mL, glass VOAs with Septa lids. Groundwater samples collected for RCRA D-list metals will be first filtered with a 0.45-micron filter and then dispensed into laboratory-supplied 250-milliliter plastic containers preserved by the laboratory. Groundwater samples collected from hexavalent chromium analysis would be filtered and preserved using the laboratory -provided sampling kit into the laboratory-supplied containers. These groundwater samples will be immediately placed on ice in a sample cooler and delivered under chain-of-custody protocol to Pace for analysis of VOCs by U.S. EPA Method 8260D, SVOCs by U.S. EPA Method 8270E, and RCRA D-list metals by U.S. EPA Method 6020B/7470A. Additionally, groundwater samples to be analyzed for hexavalent chromium by U.S. EPA Method 218.6 and PFAS by U.S. EPA Method 1633 will be shipped to Eurofins. All samples will be properly documented and handled. Wasatch would request a laboratory QC level of 3 for the collected samples. All sampling will conform to the guidelines specified in the SAP and QAPP. All sample locations will be properly mapped and documented. Wasatch will also collect depth to groundwater measurements from the on-Site piezometers and construct a piezometric surface map to be presented as a Figure in the report. If Wasatch cannot obtain access agreements to complete the proposed off-Site borings, Wasatch will coordinate with the Client and VCP to determine other potential options for sampling. Task 2b: Catch Basin Line Inspections Task 2c will include extending a line inspection camera into the lines, that go to and from, the catch basins observed on the eastern Site boundary. The inspection camera is equipped with a locating device, and the lines will be mapped and painted on the ground surface. However, damage to the underground piping may prevent the lines from being fulling inspected. All damage to the piping will be documented in the field notes. Task 3: Contingencies If the data resulting from the borings, groundwater sampling, and soil sampling activities indicate that potential impacts have not been sufficiently defined or identify unexpected contamination, Wasatch will immediately communicate relevant findings to the Client and the VCP and work to develop an appropriate investigative alternative. Additionally, the lower soil samples would only be analyzed if the upper soil samples exhibit concentrations that exceed their applicable screening levels. Task 4: Report Preparation Task 4 includes the preparation of a report documenting the results of the work performed under this Work Plan. The report will include narrative text describing the objectives, methods used, results, conclusions, and recommendations for the next phase of work, if required. The report will also include the laboratory analytical reports and data validation reports. Laboratory data for all the samples will be summarized in separate data tables (organized by sample matrix) included in the report. The data tables will also include historical data from the Site. The soil data table will present a comparison of the soil data to the U.S. EPA Regional Screening Levels for Industrial Soil, U.S. EPA Regional Screening Levels for Residential Soil, Utah ISLs. The groundwater data table will present a comparison of the groundwater data to the U.S. EPA MCLs, Utah ISLs, and SSCLs to be calculated using the DERR SSCL calculator version V1.2 for select petroleum analytes (if applicable). The report will also include a detailed map(s) showing all sample locations from tasks described above. Revised Site Characterization Work Plan 1300 SOUTH SLC PROPERTY Wasatch Environmental, Inc. 5 The report will also include a photographic log to aid in illustrating r elevant aspects of the tasks described above. 5. Deliverables One report, as described in Task 4 above, will be provided in electronic format (Portable Document Format [PDF]) to both the Applicant and the VCP. Hardcopies and additional electronic copies will be made available upon request from either the Applicant or the VCP. Sincerely, WASATCH ENVIRONMENTAL, INC. Blake B. Downey, P.G. Vice President and Senior Project Hydrogeologist Attachments: Figure 1 – Site Location Map Figure 2 – Proposed Sample Location and Site Feature Map Figure 3 – Soil Gas Exceedance Map Figure 4 – Groundwater Exceedance Map Figure 5 – Potentiometric Surface Map Table 1 – Sample Analysis The use or reuse of this information is restricted to the referenced document unless otherwise authorized. Wasatch Environmental Copyright 2006 1300 SOUTH SLC PROPERTY WEI 2779-003D Site Location Map Figure 1 Approximate Site Boundary Lucy Ave. Ch i c a g o S t r e e t 1300 South I- 1 5 50 0 W es t Lucy Ave. 1 inch = 516 feet The use or reuse of this information is restricted to the referenced document unless otherwise authorized. Wasatch Environmental Copyright 2006 1300 SOUTH SLC PROPERTY WEI 2779-003D Proposed Sample Location and Site Feature Map Figure 2 Previous Soil Gas Sample Location Previous Boring Location LEGEND GP-1 GP-2 GP-3 1 inch = 37 feet Approximate Site Boundary GP-4 GP-5 SG-5 SG-6 SG-3 SG-4 SG-1 SG-2 Lucy Ave. 1300 South 40 0 W es t Floor Drain/Sump Location Trench Floor Drain Location Former Sealed Floor Drain/Sump Floor Drain/Sump Sump Cleanout Proposed Boring Location Pizometer Location Oﬃce GP-8 GP-9 GP-6 GP-7 GP-16 GP-17 GP-14 GP-15 GP-12 GP-13 GP-10 GP-11 GP-25 GP-24 GP-23 GP-22 GP-27 GP-18 GP-19 GP-26 GP-20 GP-21 GP-28 Oil Stained Area GP-29 GP-31 GP-30 The use or reuse of this information is restricted to the referenced document unless otherwise authorized. Wasatch Environmental Copyright 2006 1300 SOUTH SLC PROPERTY WEI 2779-003D Figure 3 1 inch = 37 feet Lucy Ave. 1300 South Previous Soil Gas Sample Location 1st Round Boring Location LEGEND Floor Drain/Sump Location Trench Floor Drain Location GP-1 GP-2 SG-4 SG-1 40 0 W es t Former Sealed Floor Drain/Sump Floor Drain/Sump Sump Cleanout *All soil gas concentrations are in micrograms per cubic meter (µg/m³). **Only soil gas concentrations that exceed the U.S. EPA VISL Residential TSSGCs are depicted. SG-3 PCE - 6,260 Chloroform - 16.3 SG-5 PCE - 654 SG-6 PCE - 1,170 GP-9 GP-16 GP-12 GP-13 GP-10 GP-11 PCE - 12,500 TCE - 595 Benzene - 20.5 DCA - 124 2nd Round Boring Location Pizometer Location Approximate Site Boundary Soil Gas Exceedance Map GP-4 GP-8 GP-17 GP-7 GP-5 GP-3 GP-14 GP-6 GP-15 The use or reuse of this information is restricted to the referenced document unless otherwise authorized. Wasatch Environmental Copyright 2006 1300 SOUTH SLC PROPERTY WEI 2779-003D Figure 4 1 inch = 37 feet Lucy Ave. 1300 South Previous Soil Gas Sample Location 1st Round Boring Location LEGEND Floor Drain/Sump Location Trench Floor Drain Location GP-1 GP-2 SG-4 SG-1 40 0 W es t Former Sealed Floor Drain/Sump Floor Drain/Sump Sump Cleanout GP-4 PCE - 5.6 ug/L PFOA - 17 ng/L GP-5 PFOA - 4.6 ng/L GP-3 PFOA - 8.3 ng/L *Only groundwater concentrations that exceed the U.S. EPA MCL are depicted. GP-9 GP-16 GP-12 GP-13 GP-10 GP-11 2nd Round Boring Location Pizometer Location GP-14 Benzene - 5.2 ug/L GP-15 Benzene - 8.1 ug/L PFOS - 7.7 ng/L GP-17 Benzene - 10.0 ug/L GP-12 PFOA - 6.1 ng/L GP-7 PFOA - 21 ng/L PFOS - 13 ng/L GP-8 PFOA - 16 ng/L GP-6 PFOS - 5.8 ng/L Approximate Site Boundary Groundwater Exceedance Map SG-6 SG-3 SG-2 SG-5 The use or reuse of this information is restricted to the referenced document unless otherwise authorized. Wasatch Environmental Copyright 2006 1300 SOUTH SLC PROPERTY WEI 2779-003D Potentiometric Surface Map Figure 5 1 inch = 37 feet Approximate Site Boundary Lucy Ave. 1300 South 40 0 W es t Former Sealed Floor Drain/Sump Floor Drain/Sump Sump Cleanout Oﬃce GP-9 GP-7 GP-14 GP-12 General Groundwater Flow Direction Hydraulic Gradient 0.001 ft/ft Groundwater Contour 0.01 Groundwater Elevation (feet) Pizometer Location LEGEND (92.31) (92.61) (92.66) (93.19) 92. 4 0 92.5 0 92.6 0 92.7 0 92.8 0 92.9 0 93.0 0 93.1 0 Boring Location Sample Media Number of Samples VOCs PAHs RCRA D-List Metals Hexavalent Chromium PFAS GP-18 Soil GP-19 Soil GP-20 Soil GP-21 Soil GP-22 Soil GP-23 Soil GP-24 Soil GP-25 Soil GP-26 Soil GP-27 Soil GP-28 Soil GP-29 Soil GP-30 Soil GP-18 GW GP-19 GW GP-20 GW GP-21 GW GP-22 GW GP-23 GW GP-24 GW GP-25 GW GP-26 GW GP-27 GW GP-28 GW GP-29 GW GP-30 GW NOTES: GW = Groundwater. Table 1 Sample Analysis 1300 South SLC Property