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HomeMy WebLinkAboutDERR-2025-001357195 North 1950 West • Salt Lake City, UT Mailing Address: P.O. Box 144840 • Salt Lake City, UT 84114-4840 Telephone (801) 536-4100 • Fax (801) 359-8853 • T.D.D. (801) 536-4284 www.deq.utah.gov Printed on 100% recycled paper State of Utah SPENCER J. COX Governor DEIDRE HENDERSON Lieutenant Governor Department of Environmental Quality Kimberly D. Shelley Executive Director DIVISION OF ENVIRONMENTAL RESPONSE AND REMEDIATION Brent H. Everett Director ERRC-031-25 February 21, 2025 Ryan Dunham Site Assessment Manager U.S. EPA Region 8 (8EPR-B) 1595 Wynkoop St. Denver, Colorado 80202-1129 RE: Site Inspection Analytical Results Report 900 South 200 West Solvents SEMS EPA ID UTN000821040 Dear Mr. Dunham: Enclosed for your review is a Site Inspection (SI) Analytical Results Report (ARR) for 900 South 200 West Solvents (SEMS EPA ID UTN000821040) (herein referred to as “Site”) located in Salt Lake City, Salt Lake County, Utah. This investigation was initiated due to the detection of chlorinated solvents in soil, groundwater, indoor air, and soil gas at the Site since 1999. These chlorinated solvents include: Tetrachloroethene (PCE), Trichloroethene (TCE), 1,1-dichloroethene (1,1-DCE), cis-1,2-dichlorethene (cis-1,2-DCE), trans-1,2-dichloroethene (trans-1,2-DCE), and vinyl chloride (VC). These substances, known nervous system depressants, were found at concentrations exceeding the U.S. Environmental Protection Agency’s (EPA) benchmark concentrations, posing potential risks to human health and the environment. The Utah Department of Environmental Quality, Division of Environmental Response and Remediation (DERR), completed a Preliminary Assessment in May 2021, followed by this SI to further evaluate potential risks. Page 2 Key findings in the SIARR are: Groundwater: PCE, TCE, DCE, and VC were detected at levels exceeding the EPA Tapwater Screening Levels and/or Maximum Contaminant Levels. However, the nearest municipal well (1.8 miles away) and the closest non-monitoring well (1,000 feet away) are both outside the contaminant plume, making groundwater exposure unlikely. Soil Gas: PCE and TCE were detected at levels exceeding the EPA Vapor Intrusion Screening Levels for commercial use, primarily near the former dry-cleaner site. However, the design of the adjacent Slate Apartments, with residential areas positioned away from the source zone, minimizes potential exposure. The absence of chlorinated solvents in down-gradient locations further suggests minimal risk of vapor intrusion into occupied spaces. For these reasons, the DERR recommends a No Further Remedial Action Planned for this Site. Thank you for your attention to this matter. If you have any questions, please contact me at (385) 391-8147 or etagliaferri@utah.gov. Sincerely, Edoardo Tagliaferri, Site Assessment Project Manager Division of Environmental Response and Remediation ET/jn Enclosure: 900 South 200 West Site Inspection Analytical Results Report cc: Dorothy Adams, Executive Director, Salt Lake County Health Department Ron Lund, Environmental Health Director, Salt Lake County Health Department SITE VISIT REPORT DATE: 11/1/2023 DATE OF VISIT: 10/23/2023 - 10/26/2023 SITE: 900 South 200 West Solvents EPA SEMS ID #: UTN000821040 SITE ADDRESS: 906 S 200 W, Salt Lake City, UT 84101 AREA OF INTEREST: Residential and Business Properties Northwest (Downgradient) of Site Prepared by: Edoardo Tagliaferri Utah Department of Environmental Quality Division of Environmental Response and Remediation 195 North 1950 West Salt Lake City, UT 84116 ATTENDEES: Edoardo Tagliaferri, DERR Michael Swistak, DERR Tom Daniels, DERR Anne Eisman, Tetratech Joe Rudi, Tetratech Brendan Deckelman, Tetratech Patrick Scott, Tetratech Evan, Tetratech Ellen, Tetratech Cody Thompson, GPRS ARRIVAL TIME - DEPARTURE TIME: Monday: 07:00 / 14:40 Tuesday: 07:52 / 17:52 Wednesday: 07:30 / 17:23 Thursday: 07:30 / 13:17 SUMMARY: The purpose of this site visit was to perform soil gas and groundwater sampling in the public ways northwest of the site, in accordance with the 900s 200w Site Inspection Work Plan (February 2023, Sandlin), to delineate current plume boundaries and assess the risk that soil vapor intrusion poses to properties downgradient of the site. - On Monday 10/23 Rudi, Swistak, and I met with Thompson to perform the private utility- locate on each of the eight future boring locations. Blue Stakes were scheduled for 8am, but some showed up later that day (electricity, phone, google fiber, gas) and sewer/water the next day, though Rudi stayed on-site to wait for them until 16:00. - On Tuesday 10/24 Rudi, Swistak and I were joined by the rest of the Tetratech crew. Tom from the city located sewer/water utilities. Cleared for drilling, a safety meeting was conducted and we began soil gas boring, purging, and collection of samples. Throughout the day, all 8 soil gas samples were collected. After the first was bored to 6’ bgs per the work plan, the second hit refusal at 5’bgs; the decision was then made to bore all remaining soil gas holes to 5’bgs, for time, continuity between samples, and 5’bgs being standard in other samplings. SG-05 was re-sampled because while performing the first sample, the pressure rose to -5mmHg faster than the prescribed hour. All soil gas borings were patched. Sampling was attempted on an existing monitoring well but pushed to the next day due to overly slow flow speed from bladder pump, excessive well drawdown, and time constraints. - On Wednesday 10/25 the full Tetratech team and I continued sampling. SG-03 was redone due to the initial pressure being -19.9 mmHg instead of -25 mmHg, and was patched afterwards. Three of the four temporary monitoring wells were drilled today; MW-08 was postponed until the car above it had moved. The new borings and existing monitoring wells were scanned with a photoionization detector (PID) for worker safety; low-flow sampling & purging methods were used with a GeoTech GeoPump peristaltic pump, and water quality parameters were measured in five-minute intervals until stable using a YSI multi-parameter reader. For the samples, water was drawn into the tubing, the pump was stopped, the tubing was pulled out of the well, and the flow was reversed to fill the sampling vial. Due to high turbidity and sediment in the water column of the temporary wells, no temporary wells were sampled this day, and the decision was made to let them sit overnight, protected by duct tape, a vinyl glove, and a cone. All the existing monitoring wells were sampled today, using the same methods. Daniels joined briefly to walk the site and see the sampling in action. - On Thursday 10/26 the full Tetratech team (minus Ellen) and I continued sampling. MW- 08 was unoccupied by the car and was bored. All four temporary monitoring wells achieved stabilization quickly and were sampled, and subsequently patched. An end-of- work meeting was held, we ensured all work had been completed, and departed the site. On Tuesday Kevin Higgs from Granite Environmental, the contractor who made the new road construction for the city over the past three years, was passing by the site on other business and told us there was a box culvert that was not marked by the city nor private locator, passing within the marked private locate marked box; when we re-drilled SG-03 on Wednesday refusal was hit at 3 feet, seeming to confirm the presence of the box culvert (SG-03 was successfully re-redrilled one foot north). After the bladder pump was not able to pump water out at an acceptable rate to take the parameters/samples, the idea of using a peristaltic pump was posed to Ryan Dunham; the concern with using the peristaltic was that Tetratech thought that VOC’s might be stripped from the water when going through the pump. After Dunham’s approval, the peristaltic pump was used, with the main deviation from general practice that we reversed the pump so that the water being sampled was never going through the pump. Eisman believed this last edition would make for more accurate results. Throughout the week, the types of blanks to use were discussed. Because a lab did not supply the sampling vials to Tetratech and they put together their own kit, they made their own trip blanks in the field at the site. These served as trip blanks. After conversation we added a temperature blank before they sent the samples to the lab. During planning maps and tables were revised, and therefore there was some confusion on which maps and sample points to use. The main clarification that I needed to make was which samples were to be field duplicates, and which were to be MS/MSDs. The field duplicate for groundwater was taken at MW-107M, and the field duplicate for soil gas was taken at SG-05. The MS/MSD was taken at MW-101. PHOTO LOG: Ryan Dunham Site Assessment Manager U.S. Environmental Protection Agency Region 8 1595 Wynkoop St. Denver, CO 80202 Subject: Dear Mr. Dunham: Tetra Tech, Inc. (Tetra Tech) is pleased to submit the following letter report for the 900 South 200 West Solvents Site in Salt Lake City, Salt Lake County, Utah. The Superfund Technical Assessment and Response Team (START) assisted the U.S. Environmental Protection Agency (EPA) and Utah Department of Environmental Quality(UDEQ) with assessment activities at the site from October 24 through 26, 2023. Enclosure 1 provides figures that depict the site location and sample locations. Enclosure 2 provides three tables that summarize the sampling and analytical results. Enclosure 3 provides the photographic log. Enclosure 4 provides the data validation report. Enclosure 5 contains the laboratory data packages. Enclosure 6 contains scanned copies of field notes. SITE DESCRIPTION AND BACKGROUND The site is located on 900 South between the intersections of 200 West and 300 West in Salt Lake City, Salt Lake County, Utah (Figure 1 in Enclosure 1). The approximate center of the site is located at 40.7494047, -111.896997. The site includes multiple parcels, including one which contained a now demolished dry cleaning facility (the Facility) at 906 South 200 West. The Facility hosted dry cleaning operations from 1920 to 2015 when Henrie’s Dry Cleaners, the most recent occupant, closed (UDEQ 2023). The site is located in a mixed-use area, with residential developments bordering the Facility to the south and southwest. There are various restaurants, residential units, and small businesses in the area. A Utah Transit Authority TRAX rail line and passenger station is at the intersection of 900 South and 200 West. Two underground storage tanks (USTs) containing a dry-cleaning solvent mixture (Stoddard solvent) and an oil- Final Letter Report –900 South 200 West Solvents Salt Lake City, Salt Lake County, Utah EPA Contract No. 68HE0820D0001 TD No: 2361-2311-09 DTN: 1518 February 13, 2024 water separator were previously used at the Facility. In 1990, the USTs were removed after they were found to be leaking, and impacted soil was removed in 1992 (UDEQ 2023). In a 1992 report published by Sitex Environmental, Inc., minor residual ethylbenzene and xylene contamination was found after the soil removal clean-up efforts (UDEQ 2023). In a 1999 Phase II Subsurface Investigation, Granite Environmental, Inc. found tetrachloroethene (PCE) at a concentration of 300 micrograms per kilogram (µg/kg) in a soil sample from the Facility. Since then, multiple environmental investigations have identified chlorinated solvents in soil, groundwater, and soil gas at concentrations exceeding EPA Regional Screening Levels (RSLs), Maximum Contaminant Levels (MCLs), and Vapor Intrusion Screening Levels (VISLs). These contaminants include PCE, trichloroethene (TCE), 1,1- dichloroethene (1,1-DCE), cis-1,2-dichloroethene (cis-1,2-DCE), trans-1,2-dichloroethene, and vinyl chloride (UDEQ 2023). Two source areas for chlorinated solvent contamination were located—one near the northwest corner of the Facility associated with the Stoddard solvent UST basin, and one near the west-central portion of the Facility associated with a drum storage area and dry-cleaning equipment (UDEQ 2023). In 2021, the Utah Division of Waste Management and Radiation Control approved a Corrective Action Plan (CAP) and Baseline Risk Assessment and Work Plan for the Facility in an effort to remediate contamination and reduce migration from the site. Since beginning remediation efforts, follow-up soil sampling events have shown that contaminants at the two source areas are at lower concentrations than residential RSLs (UDEQ 2023). A Preliminary Assessment in 2021 by the Utah Division of Environmental Response and Remediation for 900 South 200 West states that chlorinated solvents have migrated from the Facility to nearby adjacent properties. The boundaries of the current plume are unknown (UDEQ 2023). FIELD ACTIVITIES START conducted field activities at the site from October 24 through 26, 2023 based on a work plan prepared by UDEQ. Figure 2 in Enclosure 1 depicts the site features and sampling locations associated with the site. Prior to field activities, START arranged subsurface utility clearance through Blue Stakes of Utah and Ground Penetrating Radar Systems (GPRS). UDEQ obtained necessary access agreement and worked with START on site to provide guidance for sampling. The following subsections provide a description of the field activities and samples collected. Soil Gas Sampling Between October 24 and 25, 2023, soil gas implants were installed at eight locations chosen by UDEQ using direct-push technology (DPT) to advance push rods to a depth of 5 feet below ground surface (bgs) (Figure 2). The rods were pulled up approximately 1 foot out of the boring and a stainless-steel implant attached to 0.25- inch-diameter Teflon tubing was inserted in each rod. There was no need for hydrated granular bentonite to create a tight seal because the rod was tightly sealed in the borehole and the sample was being pulled directly from a port at the bottom of the rod. Each soil gas sample was collected using a batch-certified, 1-liter Summa canister affixed with a flow controller calibrated to collect a sample over an approximately 1-hour period. Starting times and vacuum pressures were recorded along with Summa canister and flow controller serial numbers for each sample. A field duplicate sample pair was collected with both Summa canisters affixed with flow controllers that connected to a common sampling port using a stainless-steel sampling “T” provided by the laboratory. Ending times and vacuum pressures were recorded after samples were collected (see Table 1 in Enclosure 2). No refusal was encountered during this field sampling event. Soil gas samples were shipped under chain of custody via FedEx to ALS Environmental (Simi Valley, California) for analysis of volatile organic compounds (VOCs) using EPA Method TO-15. Table 2 in Enclosure 2 summarizes the analytes detected in soil gas samples. Enclosure 5 contains a copy of the laboratory data package. Groundwater Sampling From October 24 through 26, 2023, START collected six groundwater samples and one duplicate sample from an existing network of permanent monitoring wells (MW-100, MW-100M, MW-101, MW-105M, MW-105S, and MW-107M) and four groundwater samples from temporary monitoring wells (MW-02, MW-05, MW-06, and MW-08) (Figure 2). Temporary monitoring wells were installed using DPT to advance borings to a total depth of 15 feet bgs at each location. Equipment was then removed from the hole, and a 10-foot-long slotted, schedule 40 polyvinyl chloride (PVC) screen with 5 feet of riser (solid casing) above was installed in each well. There were no apparent visual or olfactory indications of contamination observed during the soil borehole logging process. Samples were collected from each well using a peristaltic pump with 0.25-inch-diameter Teflon tubing. Groundwater monitoring wells were purged until groundwater parameters stabilized. Groundwater samples were shipped under chain-of-custody via FedEx to Bonner Analytical Testing Co. (Hattiesburg, Mississippi) for analysis of VOCs using EPA Method 8260D under the EPA Contract Laboratory Program (CLP). Analytical results can be found in Table 3 in Enclosure 2. Enclosure 5 contains a copy of the CLP data package. DEVIATIONS FROM SCOPE OF WORK The scope of work initially called for soil gas samples to be collected at a depth 6 feet bgs but was changed to 5 feet bgs by UDEQ in the field based on time constraints. Two groundwater and four soil gas sampling locations were moved based on proximity to marked utilities. SG- 04 was moved approximately 40 feet west across Washington Street to the southwest corner of 900 South and Washington Street. SG-07 and MW-08 were moved to approximately 50 feet south from their originally proposed locations. SG-03 was moved approximately 90 feet northwest to the median parking area in the center of 900 South between 200 West and Washington Street because of the thickness of concrete in the originally proposed location. MW-05 and SG-05 were also moved approximately 90 feet toward the corner of Washington Street and 900 South. The work plan prepared by UDEQ called for daily collection of field blanks, and the preparation of trip blanks before departure to the field (UDEQ 2023). However, trip blank samples were not prepared before the sampling event and instead were prepared on site. Trip blanks are typically prepared prior to the sampling event rather than on site so that the trip blanks accompany the sample containers to the site. UDEQ confirmed that collecting the trip blank samples in the field fulfilled the requirement of daily collection of field blanks; however, these field blanks were identified as trip blanks for laboratory purposes. The four temporary groundwater wells were sampled on October 26 after and during a mixed snow and rain precipitation event. The PVC well openings were covered, in addition to cones being placed over the pavement openings, on October 25 prior to leaving the site in anticipation of the precipitation. In case any precipitation had entered the wells, the top of the water column in the well was purged for approximately 10 minutes prior to beginning parameter collection. The YSI water quality meter was first calibrated on October 24, 2023; however, conductivity could not be calibrated on this date because of a possible instrument malfunction, and insufficient standard solution remained to calibrate the instrument a second time. Calibration was achieved for all other parameters on October 24, 2023. Monitoring wells were also sampled on October 25 and 26, 2023; however, the YSI meter could not be calibrated for any parameters on those days because of an insufficient quantity of standard solutions. The work plan prepared by UDEQ called for collection of 20 groundwater field samples, 10 soil gas field samples, 2 groundwater field duplicates, 4 trip blanks, and two matrix spike (MS) / matrix spike duplicate pairs. Only 11 groundwater field samples (including one field duplicate), 9 soil gas field samples (including one field duplicate), 2 trip blanks, and one MS/MSD were collected. The changes were caused by the reduction in the number of field samples by UDEQ prior to sampling event. Only one MS/MSD sampling location was needed, and the MS/MSD was collected from well MW-101. The reductions in field samples, field duplicates, trip blanks, and MS/MSD samples were all approved by UDEQ. DECONTAMINATION AND INVESTIGATION-DERIVED WASTE All sampling equipment sample was disposable, was removed from the site, and disposed of as non-hazardous waste. DATA VALIDATION START conducted a Stage 2B data validation of the laboratory analytical results in accordance with the Tetra Tech Quality Assurance Project Plan for Region 8 Site Assessment Task Orders, Superfund Technical Assessment and Response Team, EPA Region 8 (Tetra Tech 2023) and EPA National Functional Guidelines for Superfund Organic Methods Data Review (EPA 2020). A review of quality control samples and methods is included in the data validation reports. Enclosure 4 provides the data validation reports. Enclosure 5 provides copies of the laboratory analytical data packages. RESULTS Various analytes were detected in both soil gas and groundwater samples at concentrations exceeding screening levels. Tables 2 and 3 in Enclosure 2 contain a summary of analyte detections and exceedances in both matrices. VOCs 1,3-butadiene, benzene, chloroform, PCE, and TCE were all detected at concentrations exceeding the screening level in one or more soil gas samples. Several other analytes were not detected in any sample, but the laboratory reporting limit exceeded the screening level in one or more samples. VOCs 1,1-DCE, benzene, cis-1,2-DCE, ethylbenzene, PCE, TCE, and vinyl chloride were detected at concentrations exceeding a screening level in one or more groundwater samples. Several other analytes were not detected in any sample, but the laboratory reporting limit exceeded a screening level in one or more samples. REFERENCES Tetra Tech, Inc. 2023. “Quality Assurance Project Plan for Region 8 Site Assessment Task Orders, Superfund Technical Assessment and Response Team, EPA Region 8.” Revision 4. March. U.S. Environmental Protection Agency. 2020. “National Functional Guidelines for Superfund Organic Methods Data Review.” November. Utah Department of Environmental Quality. 2023. “Site Inspection Work Plan, 900 South 200 West Solvents, Salt Lake County, Utah, UTN00821040.” February. CLOSING If you have any questions concerning the findings of this report, please contact me at (937) 510-5911 or by email at jimmy.webster@tetratech.com. Sincerely, Jimmy Webster START V TD Manager Enclosures (6) cc: Didi Fung (START V Program Manager) Lauren Foster (START V Readiness Coordinator) Clayton Longest (START V Document Control Coordinator) ENCLOSURE 1:FIGURES ENCLOSURE : ENCLOSURE : PHOTOGRAPH LOG Project Name: 900 South 200 West Solvents Site Location: Salt Lake City, UT 84102 Project No. 2361-2311-09 Page 1 of 12 Date/Time Taken: 10/24/2023 9:53:00 AM Photographer:Deckelman_Bren dan Latitude:40.749765 Longitude:-111.897811 Photo Direction:N Category:Assessment Photo Description: Installation of soil gas implant at SG-05. Photo Name:Photos-20231024- 155334.jpg Date/Time Taken: 10/24/2023 10:55:00 AM Photographer:Deckelman_Bren dan Latitude:40.749861 Longitude:-111.897432 Photo Direction:WNW Category:Assessment Photo Description: Installation of soil gas implant at SG-03. Photo Name:Photos-20231024- 165511.jpg PHOTOGRAPH LOG Project Name: 900 South 200 West Solvents Site Location: Salt Lake City, UT 84102 Project No. 2361-2311-09 Page 2 of 12 Date/Time Taken: 10/24/2023 12:11:00 PM Photographer:Ieyoub_Patrick Latitude:40.748799 Longitude:-111.898402 Photo Direction:N Category:Assessment Photo Description: Soil gas implant at SG-07 installed and purging. Photo Name:Photos-20231024- 181132.jpg Date/Time Taken: 10/24/2023 12:23:00 PM Photographer:Ieyoub_Patrick Latitude:40.749556 Longitude:-111.898302 Photo Direction:NE Category:Assessment Photo Description: Soil gas implant at SG-04 installed and purging. Photo Name:Photos-20231024- 182308.jpg PHOTOGRAPH LOG Project Name: 900 South 200 West Solvents Site Location: Salt Lake City, UT 84102 Project No. 2361-2311-09 Page 3 of 12 Date/Time Taken: 10/24/2023 12:40:00 PM Photographer:Ieyoub_Patrick Latitude:40.749353 Longitude:-111.897544 Photo Direction:WSW Category:Assessment Photo Description: Soil gas implant at SG-08 installed and purging. Photo Name:Photos-20231024- 184050.jpg Date/Time Taken: 10/24/2023 12:41:00 PM Photographer:Ieyoub_Patrick Latitude:40.748953 Longitude:-111.897428 Photo Direction:WSW Category:Assessment Photo Description: Soil gas sample collection at SG-01. Photo Name:Photos-20231024- 184149.jpg PHOTOGRAPH LOG Project Name: 900 South 200 West Solvents Site Location: Salt Lake City, UT 84102 Project No. 2361-2311-09 Page 4 of 12 Date/Time Taken: 10/24/2023 1:05:00 PM Photographer:Ieyoub_Patrick Latitude:40.747265 Longitude:-111.896034 Photo Direction:SE Category:Assessment Photo Description: Soil gas implant at SG-02 installed and purging. Photo Name:Photos-20231024- 190526.jpg Date/Time Taken: 10/24/2023 2:45:00 PM Photographer:Ieyoub_Patrick Latitude:40.749655 Longitude:-111.897466 Photo Direction:SSW Category:Assessment Photo Description: Boring at SG-03 abandoned and filled with asphalt post sample collection. Photo Name:Photos-20231024- 204508.jpg PHOTOGRAPH LOG Project Name: 900 South 200 West Solvents Site Location: Salt Lake City, UT 84102 Project No. 2361-2311-09 Page 5 of 12 Date/Time Taken: 10/24/2023 3:13:00 PM Photographer:Ieyoub_Patrick Latitude:40.750065 Longitude:-111.898093 Photo Direction:SW Category:Assessment Photo Description: Soil gas implant at SG-06 installed and purging. Photo Name:Photos-20231024- 211336.jpg Date/Time Taken: 10/24/2023 3:39:00 PM Photographer:Ieyoub_Patrick Latitude:40.74889 Longitude:-111.897401 Photo Direction:WSW Category:Assessment Photo Description: Boring at SG-01 abandoned and filled with asphalt post sample collection. Photo Name:Photos-20231024- 213912.jpg PHOTOGRAPH LOG Project Name: 900 South 200 West Solvents Site Location: Salt Lake City, UT 84102 Project No. 2361-2311-09 Page 6 of 12 Date/Time Taken: 10/24/2023 4:15:00 PM Photographer:Ieyoub_Patrick Latitude:40.748776 Longitude:-111.898306 Photo Direction:NNW Category:Assessment Photo Description: Boring at SG-07 abandoned and filled with asphalt post sample collection. Photo Name:Photos-20231024- 221514.jpg Date/Time Taken: 10/24/2023 4:27:00 PM Photographer:Ieyoub_Patrick Latitude:40.749487 Longitude:-111.898139 Photo Direction:NNW Category:Assessment Photo Description: Boring at SG-04 abandoned and filled with asphalt post sample collection. Photo Name:Photos-20231024- 222720.jpg PHOTOGRAPH LOG Project Name: 900 South 200 West Solvents Site Location: Salt Lake City, UT 84102 Project No. 2361-2311-09 Page 7 of 12 Date/Time Taken: 10/24/2023 4:45:00 PM Photographer:Deckelman_Bren dan Latitude:40.749634 Longitude:-111.898137 Photo Direction:SSW Category:Assessment Photo Description: Collection of groundwater sample at MW-101. Photo Name:Photos-20231024- 224505.jpg Date/Time Taken: 10/24/2023 5:38:00 PM Photographer:Ieyoub_Patrick Latitude:40.750114 Longitude:-111.898122 Photo Direction:NNW Category:Assessment Photo Description: Boring at SG-06 abandoned and filled with asphalt post sample collection. Photo Name:Photos-20231024- 233850.jpg PHOTOGRAPH LOG Project Name: 900 South 200 West Solvents Site Location: Salt Lake City, UT 84102 Project No. 2361-2311-09 Page 8 of 12 Date/Time Taken: 10/25/2023 9:53:00 AM Photographer:Ieyoub_Patrick Latitude:40.749676 Longitude:-111.897683 Photo Direction:NW Category:Assessment Photo Description: Temporary monitoring well installed at MW-05 prior to groundwater sample collection. Photo Name:Photos-20231025- 155339.jpg Date/Time Taken: 10/25/2023 11:24:00 AM Photographer:Ieyoub_Patrick Latitude:40.750091 Longitude:-111.898176 Photo Direction:WSW Category:Assessment Photo Description: Temporary monitoring well installed at MW-06 prior to groundwater sample collection. Photo Name:Photos-20231025- 172416.jpg PHOTOGRAPH LOG Project Name: 900 South 200 West Solvents Site Location: Salt Lake City, UT 84102 Project No. 2361-2311-09 Page 9 of 12 Date/Time Taken: 10/24/2023 12:51:00 PM Photographer:Deckelman_Bren dan Latitude:40.748994 Longitude:-111.897484 Photo Direction: Category:Assessment Photo Description: Collection of soil gas sample at SG-01. Photo Name:Photos-20231024- 185129.jpg Date/Time Taken: 10/24/2023 1:32:00 PM Photographer:Deckelman_Bren dan Latitude:40.749567 Longitude:-111.898296 Photo Direction: Category:Assessment Photo Description: Collection of soil gas sample and duplicate sample at SG-04. Photo Name:Photos-20231024- 193241.jpg Date/Time Taken: 10/25/2023 8:48:00 AM Photographer:Deckelman_Bren dan Latitude:40.749584 PHOTOGRAPH LOG Project Name: 900 South 200 West Solvents Site Location: Salt Lake City, UT 84102 Project No. 2361-2311-09 Page 10 of 12 Longitude:-111.898155 Photo Direction:ESE Category:Assessment Photo Description: Collection of groundwater sample at MW-101. Photo Name:Photos-20231025- 144847.jpg Date/Time Taken: 10/25/2023 10:33:00 AM Photographer:Deckelman_Bren dan Latitude:40.74988 Longitude:-111.898134 Photo Direction:N Category:Assessment Photo Description: Collection of groundwater sample at MW-100. Photo Name:Photos-20231025- 163356.jpg PHOTOGRAPH LOG Project Name: 900 South 200 West Solvents Site Location: Salt Lake City, UT 84102 Project No. 2361-2311-09 Page 11 of 12 Date/Time Taken: 10/25/2023 11:26:00 AM Photographer:Deckelman_Bren dan Latitude:40.74988 Longitude:-111.898026 Photo Direction:SSE Category:Assessment Photo Description: Collection of groundwater sample at MW-100. Photo Name:Photos-20231025- 172659.jpg Date/Time Taken: 10/25/2023 3:04:00 PM Photographer:Deckelman_Bren dan Latitude:40.749437 Longitude:-111.896976 Photo Direction:NW Category:Assessment Photo Description: Collection of groundwater sample at MW-107M. Photo Name:Photos-20231025- 210423.jpg PHOTOGRAPH LOG Project Name: 900 South 200 West Solvents Site Location: Salt Lake City, UT 84102 Project No. 2361-2311-09 Page 12 of 12 Date/Time Taken: 10/25/2023 4:13:00 PM Photographer:Deckelman_Bren dan Latitude:40.749188 Longitude:-111.896792 Photo Direction:SSE Category:Assessment Photo Description: Groundwater sampling at MW-105S. Photo Name:Photos-20231025- 221315.jpg Date/Time Taken: 10/26/2023 8:43:00 AM Photographer:Deckelman_Bren dan Latitude:40.749774 Longitude:-111.897828 Photo Direction:NW Category:Assessment Photo Description: Groundwater sampling at MW-05. Photo Name:Photos-20231026- 144327.jpg ENCLOSURE : ENCLOSURE : ENCLOSURE :