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HomeMy WebLinkAboutDERR-2025-003695McWane Ductile Utah Underground Storage Tank Subsurface Investigation Project No. 117-353100-25002 March 11, 2025 PREPARED FOR PRESENTED BY McWane Ductile Utah c/o Ms. Christy Webster 2550 South Industrial Parkway Provo, Utah 84606 christy.webster@mcwanteductile.com Tetra Tech, Inc. 4750 West 2100 South Suite 400 Salt Lake City, Utah 84120 (801) 736-7451 Prepared by: David S. Wilson, P.E., P.G. Principal Engineer & Certified UST Consultant Utah CC-0072 DavidWilson.Wilson@tetratech.com 03/11/2025 Anna Rasmuson, PhD, P.E., P.G. Project Manager Anna.Rasmuson@tetratech.com 03/11/2025 McWane Ductile Utah Underground Storage Tank Subsurface Investigation Report McWane Ductile Provo, Utah i March 11, 2025 TABLE OF CONTENTS 1.0 INTRODUCTION ................................................................................................................................................. 1 2.0 REGULATORY CRITERIA ................................................................................................................................. 2 3.0 NATURE OF RELEASE AND ABATEMENT MEASURES ............................................................................... 3 4.0 METHODOLOGY ................................................................................................................................................ 4 Drilling and Well Installation .......................................................................................................................... 4 Sample Collection ......................................................................................................................................... 4 Laboratory Analyses ..................................................................................................................................... 5 Field Records ................................................................................................................................................ 5 5.0 RESULTS ............................................................................................................................................................ 6 6.0 CONCLUSION AND RECOMMENDATIONS ..................................................................................................... 7 7.0 REFERENCES .................................................................................................................................................... 8 FIGURES Figure 1 Project Site Location Figure 2 Sample Locations and Soil Sample Depths Figure 3 Sample Locations and Groundwater Flow Contours TABLES Table 1 Subsurface Investigation Analytical Results APPENDICES Appendix A Utah DERR Letter to MDU from December 4, 2024 Appendix B Boring Logs Appendix C Well Development Logs Appendix D Field Forms Appendix E Photo Log Appendix F Laboratory Reports McWane Ductile Utah Underground Storage Tank Subsurface Investigation Report McWane Ductile Provo, Utah ii March 11, 2025 LIST OF ACRONYMS/ABBREVIATIONS Acronyms/Abbreviations Definition bgs Below Ground Surface DERR Division of Environmental Response and Remediation DP Direct Push DRO Diesel Range Organics EPA United Stated Environmental Protection Agency GRO Gasoline Range Organics LUST Leaking Underground Storage Tank MDU McWane Ductile Utah NTU Nephelometric Turbidity Units PID Photo Ionization Detector SIR Subsurface Investigation Report TPH Total Petroleum Hydrocarbons TRPH Total Recoverable Petroleum Hydrocarbons UDEQ Utah Department of Environmental Quality UST Underground Storage Tank McWane Ductile Utah Underground Storage Tank Subsurface Investigation Report McWane Ductile Provo, Utah 1 March 11, 2025 1.0 Introduction On behalf of McWane Ductile Utah (MDU), Tetra Tech, Inc. (Tetra Tech) has prepared this Subsurface Investigation Report (SIR) to present the results from the Leaking Underground Storage Tank (LUST) Subsurface Investigation as required by the Utah Department of Environmental Quality (UDEQ), Division of Environmental Response and Remediation (DERR) in a letter dated December 4, 2024 for Facility Identification No. 1001002, Release Site OMB. This SIR was prepared in accordance with the LUST Investigation Report Guide (DERR, 2014). A copy of the DERR letter from December 4, 2024, is included with this report as Appendix A. A brief site description is as follows: The MDU facility is located at 2550 South Industrial Parkway in Provo, Utah (Site) as shown on Figure 1. The Site is a ductile iron pipe manufacturer that has been in operation since the 1920s. Prior to operations, the land was an undeveloped area. A 180-gallon UST was discovered during excavation activities near the former MDU Shipping Building while a contractor was demolishing the building and removing associated infrastructure. The original contents and purpose of the UST are unknown. Limited additional information regarding the UST are presented in Section 2. This SIR presents the scope of subsurface investigation activities and methodologies employed to complete the work requested by the DERR, including sample locations and collection methods used to obtain representative soil and groundwater samples to investigate the extent of potential environmental impacts from this LUST. McWane Ductile Utah Underground Storage Tank Subsurface Investigation Report McWane Ductile Provo, Utah 2 March 11, 2025 2.0 REGULATORY CRITERIA According to Utah Administrative Code (UAC) R311-211-6, the “Petroleum Storage Tank (PST) Facility Cleanup Standards,” incorporate by reference the DERR’s Initial Screening Levels (ISLs) table dated November 1, 2005, which lists screening levels for PST sites. If the DERR Director determines that a release from an UST has occurred, the Director shall evaluate whether the contamination at the site exceeds ISLs for the released constituents. The Director may then require owners and operators to submit information that DERR believes will assist in making this evaluation. If all impacts are below ISLs, the Director shall evaluate the site for No Further Action determination. If impacts from a release are above the ISLs, the Director shall require owners and operators to submit relevant information required to evaluate the site using the Tier 1 Screening Criteria. The Tier 1 Screening Criteria were incorporated into the rule on November 1, 2005. Tier 1 Screening Criteria require that the following conditions exist for use of these less conservative cleanup criteria compared to the ISLs. 1. No buildings, property boundaries or utility lines are located within 30 horizontal feet of the highest measured concentration of any contaminant that is greater than the initial screening levels but less than or equal to the Tier 1 screening levels. 2. No buildings, property boundaries or utility lines are located within 30 horizontal feet of the highest measured concentration of any contaminant that is greater than the initial screening levels but less than or equal to the Tier 1 screening levels. 3. No water wells or surface water are located within 500 horizontal feet of the highest measured concentration of any contaminant that is greater than the initial screening levels but less than or equal to the Tier 1 screening levels. If Tier 1 Screening Criteria are met, the Director shall evaluate the site for No Further Action determination. If any of the Tier 1 Screening Criteria are not met, owners and operators shall conduct a site investigation to provide information to the DERR. The MDU facility includes the following environmental features related to the Tier 1 Criteria:  The facility is used for industrial purposes and is in an industrial zone.  The soil at the facility is comprised of several feet of imported fill overlaying native poorly graded silt with clay (ML).  The depth to groundwater is approximately three feet below ground surface (bgs) and the groundwater flow direction is to the north based on measured groundwater elevations in the four monitoring wells described in Section 4.1.  The Ironton Canal is located approximately 775 feet to the north of the former UST location.  A stormwater detention pond is located approximately 370 feet to the west of the former UST location. Based on the distance to a surface water body less than 500 feet away from the former UST location (i.e., the stormwater detention pond), the MDU facility does not meet the conditions of the Tier 1 Criteria. Therefore, MDU proposes use of the ISLs established in Subsection R311-211-6(1) as the site-specific cleanup standards. McWane Ductile Utah Underground Storage Tank Subsurface Investigation Report McWane Ductile Provo, Utah 3 March 11, 2025 3.0 NATURE OF RELEASE AND ABATEMENT MEASURES The approximately 180 gallon UST was discovered during an excavation associated with demolition of the former Shipping Building at the location shown on Figure 1. The age and original contents of the UST are unknown. The UST was constructed of steel and had several holes in it. The UST was not connected to underground piping and was filled with groundwater at the time of discovery. A DERR- certified UST Remover rendered the UST inert and removed it on November 15, 2024 with supervision from DERR. A DERR-certified Environmental Media Sampler from Tetra Tech collected soil and groundwater samples from the surrounding area (Figure 2) on the same date as the UST removal. The UST was recycled on site as scrap material and used in MDU’s operation. Tetra Tech submitted a Petroleum Storage Tank Permanent Closure Notice to DERR on November 27, 2024, which included laboratory results from the collected samples. The analysis revealed that the select concentrations of total petroleum hydrocarbons (TPH) exceeded UDEQ’s Initial Screening Levels (ISLs) and Tier 1 screening levels as diesel range organics (DRO) and for Oil and Grease in both soil and groundwater at the former UST location. The DERR directed performance of this subsurface investigation and presentation of the results in a SIR presenting the extent and degree of subsurface petroleum impacts and to assess potential risks to human health and the environment. McWane Ductile Utah Underground Storage Tank Subsurface Investigation Report McWane Ductile Provo, Utah 4 March 11, 2025 4.0 METHODOLOGY This section presents sample locations, collection procedures, and laboratory analyses. DRILLING AND WELL INSTALLATION Tetra Tech contracted Direct Push Services (DPS) to drill and install four monitoring wells for soil and groundwater sample collection at the locations shown on Figure 2. The drilling and well installations were overseen by Tetra Tech staff. ArcGIS software and a hand-held GPS provided coordinates for each installed well, enabling easy field location of installed wells. The soil encountered in the borings was interbedded brown poorly graded sand with silt (SP-SM), black peat, and grey silt with clay (ML). A sulfurous odor was noted in the peat layers; however, these layers showed low PID readings and the odor is likely attributed to naturally occurring organic material. The boring depths ranged from 9.5 to 10 feet bgs and five-foot well screens were placed at the bottom of the borings at or across the perceived water level elevation at the time of drilling. Two-inch schedule 40 PVC was used as well casing to extend the wells to ground surface. Sand filter pack was placed around the well screens and the remaining well casing was backfilled with bentonite chips to create a well seal above the well screens. An interface probe was used to determine static groundwater depths after allowing the wells to equilibrate for 24 hours. Water levels ranged from 2.99 to 3.32 feet bgs and notably increased overnight for wells MW-T2, MW-T3, and MW-T4, relative to the perceived water levels based on moist soil observations during well installations. A stadia rod and survey level were used to determine relative elevations of the top of the casing for each well. Groundwater contours and the groundwater flow direction are shown on Figure 3. The monitoring wells were left as temporary PVC stick-up wells with protective traffic cones placed around them, and were left in place without formal completion with protective well covers in case future monitoring is required. If future monitoring is not required, the temporary wells will be abandoned by removing the casings and placing bentonite chips in the former well anulus. SAMPLE COLLECTION Borehole soil sampling was directed by a photo-ionization detector (PID) for detection of volatile gases. The PID did not detect volatile gases, therefore one soil sample was collected from the capillary fringe of each boring. Sampling personnel pressed the unpreserved glass sample jars directly into the removed soil core to fill the jars, followed by immediate capping the jars to minimize potential loss of volatile organic compounds. The sample jars were immediately placed on ice in a laboratory-provided cooler, and the date and times of sample collection were recorded. The wells were allowed to sit for 24 hours prior to development, which was performed using a surge block to force water into the surrounding formation and loosen sediments. Well development logs are included in Appendix B. Surging was followed by low-flow pumping using a peristaltic pump and water quality monitoring using an In-Situ Aqua TROLL 600 water quality meter at five minutes intervals. Samples were collected when the following parameters were reached for three consecutive readings:  Dissolved Oxygen +/- 10%  Specific Conductance +/-3%  Temperature +/- 3 %  pH +/- 0.1 standard units  Oxidation-Reduction Potential +/- 10 millivolts McWane Ductile Utah Underground Storage Tank Subsurface Investigation Report McWane Ductile Provo, Utah 5 March 11, 2025 Turbidity +/- 10% nephelometric turbidity units (NTU) Drawdown of less than 0.3 feet If the well was purged dry, the sample was collected after 30 minutes to let the well recharge. Wells MW-T1, MW-T2, and MW-T3 all reached stabilization prior to groundwater sampling, but MW-T4 was purged dry and sampled after recharging for 30 minutes. LABORATORY ANALYSES All samples were hand-delivered to the laboratory, Chemtech Ford, a Utah-certified environmental laboratory located at 9632 South 500 West in Sandy, Utah. The samples were submitted for analysis the same day they were collected. A Chain-of-Custody record with assigned sample numbers and collection times accompanied all samples to the laboratory. All samples were analyzed for the following parameters: TPH-DRO by method EPA 8015C TPH Gasoline Range Organics (GRO) by EPA 8260B/C Oil & Grease Total Recoverable Petroleum Hydrocarbons (TRPH) by EPA 1664BMod MBTEXN by EPA Method 8260D The samples for TPH-DRO were put on a 5-day rush to determine whether concentrations exceeded the regulatory criteria described in Section 2, and if further fractionation analysis should be performed within the required hold times. The rest of the samples were analyzed for the other parameters using standard laboratory turnaround times. FIELD RECORDS All activities performed at the Site were documented in accordance with Tetra Tech Standard Operating Procedures, field forms and waterproof, indelible ink. The following project information was included in the field notes: Weather, personnel on Site, and equipment. Location and description of the work with start and end times for key activities. Time for completion of the work. Field record forms are included in Appendix C, and representative photos are provided in Appendix D. McWane Ductile Utah Underground Storage Tank Subsurface Investigation Report McWane Ductile Provo, Utah 6 March 11, 2025 5.0 RESULTS Sample results are provided in Table 1 and compared to the DERR ISLs and Tier 1 Screening levels for LUST sites (UDEQ, DERR, 2005). The full laboratory reports are included in Appendix E. All soil and groundwater samples were non-detect and were below the ISLs except for the MW-T4 groundwater sample wherein TPH-DRO was detected at 1.2 mg/L, which is below the Tier 1 screening level of 10 mg/L and slightly above the ISL of 1 mg/L. However, because the ISL is shown with no decimal places, and rounding of the 1.2 mg/L detection to the same level of significance results in a value equal to the ISL (i.e., 1 mg/L). The TPH-DRO results were presented upon receipt to DERR’s project manager, and because of the limited and low detections of residual concentrations in the subsurface, fractionation analysis was not considered necessary by Tetra Tech or the DERR, and was not performed for this sample. McWane Ductile Utah Underground Storage Tank Subsurface Investigation Report McWane Ductile Provo, Utah 7 March 11, 2025 6.0 CONCLUSION AND RECOMMENDATIONS Tetra Tech has evaluated and compared the sample results to the UDEQ ISLs and Tier 1 Screening Levels. All soil and groundwater samples were non-detect and were below the ISLs except for the MW- T4 groundwater sample wherein TPH-DRO was detected below the Tier 1 Screening Levels and essentially equal to the ISL. Based on these results, Tetra Tech requests no further action and clean closure of this LUST Site by the DERR. We also request permission to abandon the four temporary monitoring wells. McWane Ductile Utah Underground Storage Tank Subsurface Investigation Report McWane Ductile Provo, Utah 8 March 11, 2025 7.0 REFERENCES UDEQ, DERR, 2005, Table of Initial Screening and Tier 1 Levels for leaking petroleum storage tanks Dated November 1, 2005. UDEQ, DERR, May 2014, Leaking Underground Storage Tank (LUST) Subsurface Investigation Report Guide Dated May 2014. UDEQ, DERR, December 2024. Subsurface Investigation Reporting and Requirements McWane Ductile, located at 2550 South Industrial Parkway, Provo, Utah Facility Identification No. 1001002, Release Site OMB. Dated December 4, 2024 Figures S I n d u s t r i a l P k w y m Date: 2/19/2025 Legend Former tank location Project location 0 350 700175Feet Figure 1: Project Site Location McWane Ductile Utah 2550 South Industrial Parkway Provo, Utah Utah County, Utah McWane Ductile Utah Project Location Main Entrance 5'3'5' 6' MW-T2MW-T1MW-T3 MW-T4 3.5'3.5' SS-2, GW-1 SS-1, USC-1 m 'ate 226225 Legend Well locations with soil sample depths Former tank location Closure samples with soil sample depths 241Feet Figure 2: Sample Locations and Soil Depths McWane 'uctile UtaK 255 SoutK ,nGustrial 3arkZa\ 3roYo, UtaK UtaK Count\, UtaK 4495.9 4496.1 449 6 4496.144496.094496.07 4495.81 MW-T2MW-T1MW-T3 MW-T4 m Date 2282025 Legend Sample locations with measured groundwater elevations Groundwater contours Inferred groundwater contours Groundwater flow direction Former tank location 0 20 4010Feet Figure 3: Sample Locations and Groundwater Flow Contours McWane Ductile 8tah 2550 South Industrial 3arkwa\ 3rovo 8tah 8tah Count\ 8tah Tables Table 1: Subsurface Investigation Analytical Results MW-T1 MW-T2 MW-T3 MW-T4 MW-T1 MW-T2 MW-T3 MW-T4 TPH Gasoline 10 1 <0.125 <0.125 <0.125 <0.125 1,500 150 <0.27 <0.30 <0.36 <0.35 TPH Diesel 10 1 <1 <1 <1 1.2 5,000 500 <59 <60 <72 <67 Oil & Grease 10 10 <5 <5 <5 <5 10,000 1,000 <287 <307 <369 <350 Benzene 0.3 0.005 <0.005 <0.005 <0.005 <0.005 0.9 0.2 <0.01 <0.01 <0.01 <0.01 Ethylbenzene 4 0.7 <0.012 <0.012 <0.012 <0.012 23 5 <0.03 <0.03 <0.04 <0.03 Methyl-tert-butyl ether (MTBE)0.2 0.2 <0.008 <0.008 <0.008 <0.008 0.3 0.3 <0.02 <0.02 <0.02 <0.02 Naphthalene 0.7 0.7 <0.012 <0.012 <0.012 <0.012 51 51 <0.03 <0.03 <0.04 <0.03 Toulene 3 1 <0.012 <0.012 <0.012 <0.012 25 9 <0.03 <0.03 <0.04 <0.03 Xylenes, Total 10 10 <0.038 <0.038 <0.038 <0.038 142 142 <0.08 <0.09 <0.11 <0.10 Notes: Results with a < were not detected above the laboratory detection limit. TPH = Total Petroleum Hydrocarbons UDEQ = Utah Departmetn of Environmental Quality mg/L = milligram per liter mg/kg = milligram per kilogram Bold values indicate exceedance of State and/or federal screening levels UDEQ Groundwater Initial Screening Levels (mg/L) Groundwater Sample Results (mg/L) UDEQ Soil Tier 1 Screening Levels (mg/kg) UDEQ Soil Initial Screening Levels (mg/kg) Soil Sample Results (mg/kg) Petroleum Hydrocarbons MBTEXn UDEQ Groundwater Tier 1 Screening Levels (mg/L) Analyte Group Analyte Appendix A Utah DERR Letter to MDU from December 4, 2024 195 North 1950 West • Salt Lake City, UT Mailing Address: P.O. Box 144840 • Salt Lake City, UT 84114-4840 Telephone (801) 536-4100 • Fax (801) 359-8853 • T.D.D. (801) 536-4284 www.deq.utah.gov Printed on 100% recycled paper State of Utah SPENCER J. COX Governor DEIDRE HENDERSON Lieutenant Governor Department of Environmental Quality Kimberly D. Shelley Executive Director DIVISION OF ENVIRONMENTAL RESPONSE AND REMEDIATION Brent H. Everett Director ERRL-0494-24 December 4, 2024 CERTIFIED MAIL RETURN RECEIPT REQUESTED Christy Webster McWane Ductile 2550 South Industrial Parkway Provo, Utah 84606 Re:Subsurface Investigation Reporting and Requirements McWane Ductile, located at 2550 South Industrial Parkway, Provo, Utah Facility Identification No. 1001002, Release Site OMB Dear Ms. Webster: A release of petroleum from an aboveground petroleum storage tank (APST) at the above- referenced site was reported on November 27, 2024, to the Division of Environmental Response and Remediation (DERR) based on laboratory results of samples collected during the closure and removal of an underground petroleum storage tank (PST). According to Utah Administrative Code R311-202, you are required to report, control, abate, and characterize the release by defining the extent and degree of petroleum contamination and remediate (clean up) the release. These rules require that you prepare specific reports addressing the release and submit them to the DERR within specified time frames following the release. The DERR project manager has reviewed the release report information and recommended that additional investigation work be required. The project manager relied on the information provided and did not conduct an independent investigation of the facility. The investigation's intent is to define the extent and degree of subsurface petroleum contamination and evaluate the potential risks to human health and the environment. A Subsurface Investigation Report (SIR) outlining the results of the investigation must be submitted to the DERR within 90 days of your receipt of this letter. Requirements for an SIR are detailed in the Leaking Underground Storage Tank (LUST) Subsurface Investigation Report Guide (May 2014), which can be found on our website: https://documents.deq.utah.gov/environmental-response-and-remediation/ust-lust/leaking-undergr ound-storage-tanks-remedial-assistance/lust-subsurface-investigation-report-guide.pdf. Facility ID# 1001002 Page 2 If you hire a consultant to perform work related to this release, they must be a Certified UST Consultant (Utah Admin. Code R311-201-2). Upon submitting your SIR, the investigation results will be evaluated to determine if a no further action (closeout) determination can be recommended or if additional work is necessary. This additional work may consist of performing additional investigation activities, conducting cleanup, implementing environmental monitoring and/or performing a risk assessment. During the 2014 Utah Legislative Session, Section 19-6-420(10)(a) of the Underground Storage Tank Act was amended to allow the DERR to recover certain expenses incurred by the DERR for petroleum releases not covered by the PST Fund. The DERR’s expenses for managing and overseeing the abatement, investigation, or corrective action can be billed quarterly to the responsible party. The Utah Legislature sets these expenses for oversight and review, currently $125.00 per hour. Payment will be due within 30 days from the billing. Certain factors may be considered by the Division Director when determining whether to recover these management and oversight costs. If the responsible party can demonstrate an inability to pay, the Division Director may grant an exemption from paying these expenses. You may contact us to request an application for exemption, if needed. If you have any questions regarding this matter, please contact Eileen Brennan, the DERR project manager, at (801) 536-4100. Sincerely, Brent H. Everett, Director Division of Environmental Response and Remediation BHE/EB/rr cc: Eric Edwards, Executive Director, Utah County Health Department Jason Garrett, Environmental Health Director, Utah County Health Department Anna Rasmuson, PhD, PE, & PG, Tetra Tech Appendix B Boring Logs Appendix C Well Development Logs Appendix D Field Forms Appendix D Photo Log McWane Ductile Utah Tank Closure Page 1 of 2 PHOTO LOG Number: 1 Date: February 5, 2025 Description: Drill cuttings from boring MW-T2. Number: 2 Date: February 5, 2025 Description: Drill Cuttings from boring MW-T1. McWane Ductile Utah Tank Closure Page 2 of 2 PHOTO LOG Number: 3 Date: February 5, 2025 Description: Drill Cuttings from boring MW-T4. Number: 4 Date: February 5, 2025 Description: Drill Cuttings from boring MW-T3. Appendix E Laboratory Reports The analyses presented on this report were performed in accordance with the National Environmental Laboratory Accreditation Program (NELAP) unless noted in the comments, flags, or case narrative. If the report is to be used for regulatory compliance, it should be presented in its entirety, and not be altered. Client Service Contact: 801.262.7299 Tetra Tech Inc. Attn: Richie Torney 4750 W 2100 S, Suite 400 Salt Lake City, UT 84120 Work Order: 25B0540 Project: MDU Tank 2/18/2025 Approved By: Mark Broadhead, Project Manager 9632 South 500 West Sandy, Utah 84070 Serving the Intermountain West since 1953 801.262.7299 Main 866.792.0093 Fax www.ChemtechFord.com Page 1 of 7 xx Chemtech-Ford Laboratories Serving the Intermountain West Since 1953 Certificate of Analysis 9632 South 500 West Sandy, UT 84070 O:(801) 262-7299 F: (866) 792-0093 www.ChemtechFord.com Tetra Tech Inc. Richie Torney 4750 W 2100 S, Suite 400 Salt Lake City, UT 84120 PO#: Receipt: Date Reported: Project Name: 117-353100-25002 2/6/25 16:56 @ 10.6 °C 2/18/2025 MDU Tank Sample ID: MW-T2 Lab ID: 25B0540-01Matrix: Water Flag(s)Units Analysis Date/Time Date Sampled: 2/6/25 12:35 Preparation Date/Time Sampled By: Richie Torney Minimum Reporting Limit MethodResult Inorganic mg/L 2/13/252/12/255EPA 1664BNDOil & Grease (HEM) mg/L 2/13/252/12/255EPA 1664BNDTRPH (SGT-HEM) MBTEXn mg/L 2/11/252/11/250.005 EPA 8260D/5030BNDBenzene mg/L 2/11/252/11/250.012 EPA 8260D/5030BNDEthylbenzene mg/L 2/11/252/11/250.008 EPA 8260D/5030BNDMethyl-tert-butyl ether (MTBE) mg/L 2/11/252/11/250.012 EPA 8260D/5030BNDNaphthalene mg/L 2/11/252/11/250.012 EPA 8260D/5030BNDToluene mg/L 2/11/252/11/250.038 EPA 8260D/5030BNDXylenes, total Gasoline Range mg/L 2/11/252/11/250.125 EPA 8260B/C /5030A/[CALC]NDGasoline Range Organics Project Name: MDU Tank CtF WO#: 25B0540 www.ChemtechFord.com Page 2 of 7Page 2 of 7 xx Chemtech-Ford Laboratories Serving the Intermountain West Since 1953 Certificate of Analysis 9632 South 500 West Sandy, UT 84070 O:(801) 262-7299 F: (866) 792-0093 www.ChemtechFord.com Tetra Tech Inc. Richie Torney 4750 W 2100 S, Suite 400 Salt Lake City, UT 84120 PO#: Receipt: Date Reported: Project Name: 117-353100-25002 2/6/25 16:56 @ 10.6 °C 2/18/2025 MDU Tank Sample ID: MW-T1 Lab ID: 25B0540-02Matrix: Water Flag(s)Units Analysis Date/Time Date Sampled: 2/6/25 13:05 Preparation Date/Time Sampled By: Richie Torney Minimum Reporting Limit MethodResult Inorganic mg/L 2/13/252/12/255EPA 1664BNDOil & Grease (HEM) mg/L 2/13/252/12/255EPA 1664BNDTRPH (SGT-HEM) MBTEXn mg/L 2/11/252/11/250.005 EPA 8260D/5030BNDBenzene mg/L 2/11/252/11/250.012 EPA 8260D/5030BNDEthylbenzene mg/L 2/11/252/11/250.008 EPA 8260D/5030BNDMethyl-tert-butyl ether (MTBE) mg/L 2/11/252/11/250.012 EPA 8260D/5030BNDNaphthalene mg/L 2/11/252/11/250.012 EPA 8260D/5030BNDToluene mg/L 2/11/252/11/250.038 EPA 8260D/5030BNDXylenes, total Gasoline Range mg/L 2/11/252/11/250.125 EPA 8260B/C /5030A/[CALC]NDGasoline Range Organics Project Name: MDU Tank CtF WO#: 25B0540 www.ChemtechFord.com Page 3 of 7Page 3 of 7 xx Chemtech-Ford Laboratories Serving the Intermountain West Since 1953 Certificate of Analysis 9632 South 500 West Sandy, UT 84070 O:(801) 262-7299 F: (866) 792-0093 www.ChemtechFord.com Tetra Tech Inc. Richie Torney 4750 W 2100 S, Suite 400 Salt Lake City, UT 84120 PO#: Receipt: Date Reported: Project Name: 117-353100-25002 2/6/25 16:56 @ 10.6 °C 2/18/2025 MDU Tank Sample ID: MW-T4 Lab ID: 25B0540-03Matrix: Water Flag(s)Units Analysis Date/Time Date Sampled: 2/6/25 13:35 Preparation Date/Time Sampled By: Richie Torney Minimum Reporting Limit MethodResult Inorganic mg/L 2/13/252/12/255EPA 1664BNDOil & Grease (HEM) mg/L 2/13/252/12/255EPA 1664BNDTRPH (SGT-HEM) MBTEXn mg/L 2/11/252/11/250.005 EPA 8260D/5030BNDBenzene mg/L 2/11/252/11/250.012 EPA 8260D/5030BNDEthylbenzene mg/L 2/11/252/11/250.008 EPA 8260D/5030BNDMethyl-tert-butyl ether (MTBE) mg/L 2/11/252/11/250.012 EPA 8260D/5030BNDNaphthalene mg/L 2/11/252/11/250.012 EPA 8260D/5030BNDToluene mg/L 2/11/252/11/250.038 EPA 8260D/5030BNDXylenes, total Gasoline Range mg/L 2/11/252/11/250.125 EPA 8260B/C /5030A/[CALC]NDGasoline Range Organics Project Name: MDU Tank CtF WO#: 25B0540 www.ChemtechFord.com Page 4 of 7Page 4 of 7 xx Chemtech-Ford Laboratories Serving the Intermountain West Since 1953 Certificate of Analysis 9632 South 500 West Sandy, UT 84070 O:(801) 262-7299 F: (866) 792-0093 www.ChemtechFord.com Tetra Tech Inc. Richie Torney 4750 W 2100 S, Suite 400 Salt Lake City, UT 84120 PO#: Receipt: Date Reported: Project Name: 117-353100-25002 2/6/25 16:56 @ 10.6 °C 2/18/2025 MDU Tank Sample ID: MW-T3 Lab ID: 25B0540-04Matrix: Water Flag(s)Units Analysis Date/Time Date Sampled: 2/6/25 14:05 Preparation Date/Time Sampled By: Richie Torney Minimum Reporting Limit MethodResult Inorganic mg/L 2/13/252/12/255EPA 1664BNDOil & Grease (HEM) mg/L 2/13/252/12/255EPA 1664BNDTRPH (SGT-HEM) MBTEXn mg/L 2/11/252/11/250.005 EPA 8260D/5030BNDBenzene mg/L 2/11/252/11/250.012 EPA 8260D/5030BNDEthylbenzene mg/L 2/11/252/11/250.008 EPA 8260D/5030BNDMethyl-tert-butyl ether (MTBE) mg/L 2/11/252/11/250.012 EPA 8260D/5030BNDNaphthalene mg/L 2/11/252/11/250.012 EPA 8260D/5030BNDToluene mg/L 2/11/252/11/250.038 EPA 8260D/5030BNDXylenes, total Gasoline Range mg/L 2/11/252/11/250.125 EPA 8260B/C /5030A/[CALC]NDGasoline Range Organics Project Name: MDU Tank CtF WO#: 25B0540 www.ChemtechFord.com Page 5 of 7Page 5 of 7 xx Chemtech-Ford Laboratories Serving the Intermountain West Since 1953 Certificate of Analysis 9632 South 500 West Sandy, UT 84070 O:(801) 262-7299 F: (866) 792-0093 www.ChemtechFord.com Tetra Tech Inc. Richie Torney 4750 W 2100 S, Suite 400 Salt Lake City, UT 84120 PO#: Receipt: Date Reported: Project Name: 117-353100-25002 2/6/25 16:56 @ 10.6 °C 2/18/2025 MDU Tank Report Footnotes Abbreviations ND = Not detected at the corresponding Minimum Reporting Limit (MRL). 1 mg/L = one milligram per liter or 1 mg/kg = one milligram per kilogram = 1 part per million. 1 ug/L = one microgram per liter or 1 ug/kg = one microgram per kilogram = 1 part per billion. 1 ng/L = one nanogram per liter or 1 ng/kg = one nanogram per kilogram = 1 part per trillion. On calculated parameters, there may be a slight difference between summing the rounded values shown on the report vs the unrounded values used in the calculation. Project Name: MDU Tank CtF WO#: 25B0540 www.ChemtechFord.com Page 6 of 7Page 6 of 7 Page 7 of 7 The analyses presented on this report were performed in accordance with the National Environmental Laboratory Accreditation Program (NELAP) unless noted in the comments, flags, or case narrative. If the report is to be used for regulatory compliance, it should be presented in its entirety, and not be altered. Client Service Contact: 801.262.7299 Tetra Tech Inc. Attn: Richie Torney 4750 W 2100 S, Suite 400 Salt Lake City, UT 84120 Work Order: 25B0539 Project: MDU Tank 2/14/2025 Approved By: Mark Broadhead, Project Manager 9632 South 500 West Sandy, Utah 84070 Serving the Intermountain West since 1953 801.262.7299 Main 866.792.0093 Fax www.ChemtechFord.com Page 1 of 7 xx Chemtech-Ford Laboratories Serving the Intermountain West Since 1953 Certificate of Analysis 9632 South 500 West Sandy, UT 84070 O:(801) 262-7299 F: (866) 792-0093 www.ChemtechFord.com Tetra Tech Inc. Richie Torney 4750 W 2100 S, Suite 400 Salt Lake City, UT 84120 PO#: Receipt: Date Reported: Project Name: 117-353100-25002 2/6/25 17:01 @ 10.6 °C 2/14/2025 MDU Tank Sample ID: MW-T2 Lab ID: 25B0539-01Matrix: Water Flag(s)Units Analysis Date/Time Date Sampled: 2/6/25 12:35 Preparation Date/Time Sampled By: Richie Torney Minimum Reporting Limit MethodResult Diesel Range mg/L 2/10/252/7/251.0 EPA 8015 CNDDiesel Range Organics Project Name: MDU Tank CtF WO#: 25B0539 www.ChemtechFord.com Page 2 of 7Page 2 of 7 xx Chemtech-Ford Laboratories Serving the Intermountain West Since 1953 Certificate of Analysis 9632 South 500 West Sandy, UT 84070 O:(801) 262-7299 F: (866) 792-0093 www.ChemtechFord.com Tetra Tech Inc. Richie Torney 4750 W 2100 S, Suite 400 Salt Lake City, UT 84120 PO#: Receipt: Date Reported: Project Name: 117-353100-25002 2/6/25 17:01 @ 10.6 °C 2/14/2025 MDU Tank Sample ID: MW-T1 Lab ID: 25B0539-02Matrix: Water Flag(s)Units Analysis Date/Time Date Sampled: 2/6/25 13:05 Preparation Date/Time Sampled By: Richie Torney Minimum Reporting Limit MethodResult Diesel Range mg/L 2/10/252/7/251.0 EPA 8015 CNDDiesel Range Organics Project Name: MDU Tank CtF WO#: 25B0539 www.ChemtechFord.com Page 3 of 7Page 3 of 7 xx Chemtech-Ford Laboratories Serving the Intermountain West Since 1953 Certificate of Analysis 9632 South 500 West Sandy, UT 84070 O:(801) 262-7299 F: (866) 792-0093 www.ChemtechFord.com Tetra Tech Inc. Richie Torney 4750 W 2100 S, Suite 400 Salt Lake City, UT 84120 PO#: Receipt: Date Reported: Project Name: 117-353100-25002 2/6/25 17:01 @ 10.6 °C 2/14/2025 MDU Tank Sample ID: MW-T4 Lab ID: 25B0539-03Matrix: Water Flag(s)Units Analysis Date/Time Date Sampled: 2/6/25 13:35 Preparation Date/Time Sampled By: Richie Torney Minimum Reporting Limit MethodResult Diesel Range mg/L 2/11/252/11/251.0 EPA 8015 C1.2Diesel Range Organics Project Name: MDU Tank CtF WO#: 25B0539 www.ChemtechFord.com Page 4 of 7Page 4 of 7 xx Chemtech-Ford Laboratories Serving the Intermountain West Since 1953 Certificate of Analysis 9632 South 500 West Sandy, UT 84070 O:(801) 262-7299 F: (866) 792-0093 www.ChemtechFord.com Tetra Tech Inc. Richie Torney 4750 W 2100 S, Suite 400 Salt Lake City, UT 84120 PO#: Receipt: Date Reported: Project Name: 117-353100-25002 2/6/25 17:01 @ 10.6 °C 2/14/2025 MDU Tank Sample ID: MW-T3 Lab ID: 25B0539-04Matrix: Water Flag(s)Units Analysis Date/Time Date Sampled: 2/6/25 14:05 Preparation Date/Time Sampled By: Richie Torney Minimum Reporting Limit MethodResult Diesel Range mg/L 2/14/252/13/251.0 EPA 8015 CNDDiesel Range Organics Project Name: MDU Tank CtF WO#: 25B0539 www.ChemtechFord.com Page 5 of 7Page 5 of 7 xx Chemtech-Ford Laboratories Serving the Intermountain West Since 1953 Certificate of Analysis 9632 South 500 West Sandy, UT 84070 O:(801) 262-7299 F: (866) 792-0093 www.ChemtechFord.com Tetra Tech Inc. Richie Torney 4750 W 2100 S, Suite 400 Salt Lake City, UT 84120 PO#: Receipt: Date Reported: Project Name: 117-353100-25002 2/6/25 17:01 @ 10.6 °C 2/14/2025 MDU Tank Report Footnotes Abbreviations ND = Not detected at the corresponding Minimum Reporting Limit (MRL). 1 mg/L = one milligram per liter or 1 mg/kg = one milligram per kilogram = 1 part per million. 1 ug/L = one microgram per liter or 1 ug/kg = one microgram per kilogram = 1 part per billion. 1 ng/L = one nanogram per liter or 1 ng/kg = one nanogram per kilogram = 1 part per trillion. On calculated parameters, there may be a slight difference between summing the rounded values shown on the report vs the unrounded values used in the calculation. Project Name: MDU Tank CtF WO#: 25B0539 www.ChemtechFord.com Page 6 of 7Page 6 of 7 Page 7 of 7 The analyses presented on this report were performed in accordance with the National Environmental Laboratory Accreditation Program (NELAP) unless noted in the comments, flags, or case narrative. If the report is to be used for regulatory compliance, it should be presented in its entirety, and not be altered. Client Service Contact: 801.262.7299 Tetra Tech Inc. Attn: Richie Torney 4750 W 2100 S, Suite 400 Salt Lake City, UT 84120 Work Order: 25B0388 Project: McWane Ductile Tank 2/12/2025 Approved By: Mark Broadhead, Project Manager 9632 South 500 West Sandy, Utah 84070 Serving the Intermountain West since 1953 801.262.7299 Main 866.792.0093 Fax www.ChemtechFord.com Page 1 of 7 xx Chemtech-Ford Laboratories Serving the Intermountain West Since 1953 Certificate of Analysis 9632 South 500 West Sandy, UT 84070 O:(801) 262-7299 F: (866) 792-0093 www.ChemtechFord.com Tetra Tech Inc. Richie Torney 4750 W 2100 S, Suite 400 Salt Lake City, UT 84120 PO#: Receipt: Date Reported: Project Name: 117-353100-25002 2/5/25 14:30 @ 13.1 °C 2/12/2025 McWane Ductile Tank Sample ID: MW-T1-3' Lab ID: 25B0388-01Matrix: Solid Flag(s)Units Analysis Date/Time Date Sampled: 2/5/25 11:00 Preparation Date/Time Sampled By: Richie Torney Minimum Reporting Limit MethodResult Inorganic %2/6/252/6/250.1 CTF800085.0Total Solids Diesel Range mg/kg dry 2/10/252/10/2559EPA 8015 CNDDiesel Range Organics Project Name: McWane Ductile Tank CtF WO#: 25B0388 www.ChemtechFord.com Page 2 of 7Page 2 of 7 xx Chemtech-Ford Laboratories Serving the Intermountain West Since 1953 Certificate of Analysis 9632 South 500 West Sandy, UT 84070 O:(801) 262-7299 F: (866) 792-0093 www.ChemtechFord.com Tetra Tech Inc. Richie Torney 4750 W 2100 S, Suite 400 Salt Lake City, UT 84120 PO#: Receipt: Date Reported: Project Name: 117-353100-25002 2/5/25 14:30 @ 13.1 °C 2/12/2025 McWane Ductile Tank Sample ID: MW-T2-5' Lab ID: 25B0388-02Matrix: Solid Flag(s)Units Analysis Date/Time Date Sampled: 2/5/25 11:50 Preparation Date/Time Sampled By: Richie Torney Minimum Reporting Limit MethodResult Inorganic %2/6/252/6/250.1 CTF800083.2Total Solids Diesel Range mg/kg dry 2/10/252/10/2560EPA 8015 CNDDiesel Range Organics Project Name: McWane Ductile Tank CtF WO#: 25B0388 www.ChemtechFord.com Page 3 of 7Page 3 of 7 xx Chemtech-Ford Laboratories Serving the Intermountain West Since 1953 Certificate of Analysis 9632 South 500 West Sandy, UT 84070 O:(801) 262-7299 F: (866) 792-0093 www.ChemtechFord.com Tetra Tech Inc. Richie Torney 4750 W 2100 S, Suite 400 Salt Lake City, UT 84120 PO#: Receipt: Date Reported: Project Name: 117-353100-25002 2/5/25 14:30 @ 13.1 °C 2/12/2025 McWane Ductile Tank Sample ID: MW-T4-6' Lab ID: 25B0388-03Matrix: Solid Flag(s)Units Analysis Date/Time Date Sampled: 2/5/25 12:25 Preparation Date/Time Sampled By: Richie Torney Minimum Reporting Limit MethodResult Inorganic %2/6/252/6/250.1 CTF800074.2Total Solids Diesel Range mg/kg dry 2/10/252/10/2567EPA 8015 CNDDiesel Range Organics Project Name: McWane Ductile Tank CtF WO#: 25B0388 www.ChemtechFord.com Page 4 of 7Page 4 of 7 xx Chemtech-Ford Laboratories Serving the Intermountain West Since 1953 Certificate of Analysis 9632 South 500 West Sandy, UT 84070 O:(801) 262-7299 F: (866) 792-0093 www.ChemtechFord.com Tetra Tech Inc. Richie Torney 4750 W 2100 S, Suite 400 Salt Lake City, UT 84120 PO#: Receipt: Date Reported: Project Name: 117-353100-25002 2/5/25 14:30 @ 13.1 °C 2/12/2025 McWane Ductile Tank Sample ID: MW-T3-5' Lab ID: 25B0388-04Matrix: Solid Flag(s)Units Analysis Date/Time Date Sampled: 2/5/25 12:45 Preparation Date/Time Sampled By: Richie Torney Minimum Reporting Limit MethodResult Inorganic %2/6/252/6/250.1 CTF800069.2Total Solids Diesel Range mg/kg dry 2/10/252/10/2572EPA 8015 CNDDiesel Range Organics Project Name: McWane Ductile Tank CtF WO#: 25B0388 www.ChemtechFord.com Page 5 of 7Page 5 of 7 xx Chemtech-Ford Laboratories Serving the Intermountain West Since 1953 Certificate of Analysis 9632 South 500 West Sandy, UT 84070 O:(801) 262-7299 F: (866) 792-0093 www.ChemtechFord.com Tetra Tech Inc. Richie Torney 4750 W 2100 S, Suite 400 Salt Lake City, UT 84120 PO#: Receipt: Date Reported: Project Name: 117-353100-25002 2/5/25 14:30 @ 13.1 °C 2/12/2025 McWane Ductile Tank Report Footnotes Abbreviations ND = Not detected at the corresponding Minimum Reporting Limit (MRL). 1 mg/L = one milligram per liter or 1 mg/kg = one milligram per kilogram = 1 part per million. 1 ug/L = one microgram per liter or 1 ug/kg = one microgram per kilogram = 1 part per billion. 1 ng/L = one nanogram per liter or 1 ng/kg = one nanogram per kilogram = 1 part per trillion. On calculated parameters, there may be a slight difference between summing the rounded values shown on the report vs the unrounded values used in the calculation. Project Name: McWane Ductile Tank CtF WO#: 25B0388 www.ChemtechFord.com Page 6 of 7Page 6 of 7 Page 7 of 7 The analyses presented on this report were performed in accordance with the National Environmental Laboratory Accreditation Program (NELAP) unless noted in the comments, flags, or case narrative. If the report is to be used for regulatory compliance, it should be presented in its entirety, and not be altered. Client Service Contact: 801.262.7299 Tetra Tech Inc. Attn: Richie Torney 4750 W 2100 S, Suite 400 Salt Lake City, UT 84120 Work Order: 25B0386 Project: McWane Ductile Tank 2/14/2025 Approved By: Mark Broadhead, Project Manager 9632 South 500 West Sandy, Utah 84070 Serving the Intermountain West since 1953 801.262.7299 Main 866.792.0093 Fax www.ChemtechFord.com Page 1 of 7 xx Chemtech-Ford Laboratories Serving the Intermountain West Since 1953 Certificate of Analysis 9632 South 500 West Sandy, UT 84070 O:(801) 262-7299 F: (866) 792-0093 www.ChemtechFord.com Tetra Tech Inc. Richie Torney 4750 W 2100 S, Suite 400 Salt Lake City, UT 84120 PO#: Receipt: Date Reported: Project Name: 117-353100-25002 2/5/25 14:30 @ 13.1 °C 2/14/2025 McWane Ductile Tank Sample ID: MW - T1 - 3' Lab ID: 25B0386-01Matrix: Solid Flag(s)Units Analysis Date/Time Date Sampled: 2/5/25 11:00 Preparation Date/Time Sampled By: Richard Torney Minimum Reporting Limit MethodResult Inorganic mg/kg dry 2/6/252/5/25287EPA 1664BModNDOil & Grease (HEM) %2/7/252/7/250.1 CTF800087.2Total Solids mg/kg dry 2/6/252/5/25287EPA 1664BModNDTRPH (SGT-HEM) MBTEXn mg/kg dry 2/6/252/6/250.01 EPA 8260D/5030BNDBenzene mg/kg dry 2/6/252/6/250.03 EPA 8260D/5030BNDEthylbenzene mg/kg dry 2/6/252/6/250.02 EPA 8260D/5030BNDMethyl-tert-butyl ether (MTBE) mg/kg dry 2/6/252/6/250.03 EPA 8260D/5030BNDNaphthalene mg/kg dry 2/6/252/6/250.03 EPA 8260D/5030BNDToluene mg/kg dry 2/6/252/6/250.08 EPA 8260D/5030BNDXylenes, total mg/kg dry 2/6/252/6/250.27 EPA 8260D/5030BNDGasoline Range Organics Project Name: McWane Ductile Tank CtF WO#: 25B0386 www.ChemtechFord.com Page 2 of 7Page 2 of 7 xx Chemtech-Ford Laboratories Serving the Intermountain West Since 1953 Certificate of Analysis 9632 South 500 West Sandy, UT 84070 O:(801) 262-7299 F: (866) 792-0093 www.ChemtechFord.com Tetra Tech Inc. Richie Torney 4750 W 2100 S, Suite 400 Salt Lake City, UT 84120 PO#: Receipt: Date Reported: Project Name: 117-353100-25002 2/5/25 14:30 @ 13.1 °C 2/14/2025 McWane Ductile Tank Sample ID: MW - T2 - 5' Lab ID: 25B0386-02Matrix: Solid Flag(s)Units Analysis Date/Time Date Sampled: 2/5/25 11:50 Preparation Date/Time Sampled By: Richard Torney Minimum Reporting Limit MethodResult Inorganic mg/kg dry 2/6/252/5/25307EPA 1664BModNDOil & Grease (HEM) %2/7/252/7/250.1 CTF800081.2Total Solids mg/kg dry 2/6/252/5/25308EPA 1664BModNDTRPH (SGT-HEM) MBTEXn mg/kg dry 2/6/252/6/250.01 EPA 8260D/5030BNDBenzene mg/kg dry 2/6/252/6/250.03 EPA 8260D/5030BNDEthylbenzene mg/kg dry 2/6/252/6/250.02 EPA 8260D/5030BNDMethyl-tert-butyl ether (MTBE) mg/kg dry 2/6/252/6/250.03 EPA 8260D/5030BNDNaphthalene mg/kg dry 2/6/252/6/250.03 EPA 8260D/5030BNDToluene mg/kg dry 2/6/252/6/250.09 EPA 8260D/5030BNDXylenes, total mg/kg dry 2/6/252/6/250.30 EPA 8260D/5030BNDGasoline Range Organics Project Name: McWane Ductile Tank CtF WO#: 25B0386 www.ChemtechFord.com Page 3 of 7Page 3 of 7 xx Chemtech-Ford Laboratories Serving the Intermountain West Since 1953 Certificate of Analysis 9632 South 500 West Sandy, UT 84070 O:(801) 262-7299 F: (866) 792-0093 www.ChemtechFord.com Tetra Tech Inc. Richie Torney 4750 W 2100 S, Suite 400 Salt Lake City, UT 84120 PO#: Receipt: Date Reported: Project Name: 117-353100-25002 2/5/25 14:30 @ 13.1 °C 2/14/2025 McWane Ductile Tank Sample ID: MW - T4 - 6' Lab ID: 25B0386-03Matrix: Solid Flag(s)Units Analysis Date/Time Date Sampled: 2/5/25 12:25 Preparation Date/Time Sampled By: Richard Torney Minimum Reporting Limit MethodResult Inorganic mg/kg dry 2/6/252/5/25350EPA 1664BModNDOil & Grease (HEM) %2/7/252/7/250.1 CTF800071.3Total Solids mg/kg dry 2/6/252/5/25351EPA 1664BModNDTRPH (SGT-HEM) MBTEXn mg/kg dry 2/6/252/6/250.01 EPA 8260D/5030BNDBenzene mg/kg dry 2/6/252/6/250.03 EPA 8260D/5030BNDEthylbenzene mg/kg dry 2/6/252/6/250.02 EPA 8260D/5030BNDMethyl-tert-butyl ether (MTBE) mg/kg dry 2/6/252/6/250.03 EPA 8260D/5030BNDNaphthalene mg/kg dry 2/6/252/6/250.03 EPA 8260D/5030BNDToluene mg/kg dry 2/6/252/6/250.10 EPA 8260D/5030BNDXylenes, total mg/kg dry 2/6/252/6/250.35 EPA 8260D/5030BNDGasoline Range Organics Project Name: McWane Ductile Tank CtF WO#: 25B0386 www.ChemtechFord.com Page 4 of 7Page 4 of 7 xx Chemtech-Ford Laboratories Serving the Intermountain West Since 1953 Certificate of Analysis 9632 South 500 West Sandy, UT 84070 O:(801) 262-7299 F: (866) 792-0093 www.ChemtechFord.com Tetra Tech Inc. Richie Torney 4750 W 2100 S, Suite 400 Salt Lake City, UT 84120 PO#: Receipt: Date Reported: Project Name: 117-353100-25002 2/5/25 14:30 @ 13.1 °C 2/14/2025 McWane Ductile Tank Sample ID: MW - T3 - 5' Lab ID: 25B0386-04Matrix: Solid Flag(s)Units Analysis Date/Time Date Sampled: 2/5/25 12:45 Preparation Date/Time Sampled By: Richard Torney Minimum Reporting Limit MethodResult Inorganic mg/kg dry 2/6/252/5/25369EPA 1664BModNDOil & Grease (HEM) %2/7/252/7/250.1 CTF800067.6Total Solids mg/kg dry 2/6/252/5/25370EPA 1664BModNDTRPH (SGT-HEM) MBTEXn mg/kg dry 2/6/252/6/250.01 EPA 8260D/5030BNDBenzene mg/kg dry 2/6/252/6/250.04 EPA 8260D/5030BNDEthylbenzene mg/kg dry 2/6/252/6/250.02 EPA 8260D/5030BNDMethyl-tert-butyl ether (MTBE) mg/kg dry 2/6/252/6/250.04 EPA 8260D/5030BNDNaphthalene mg/kg dry 2/6/252/6/250.04 EPA 8260D/5030BNDToluene mg/kg dry 2/6/252/6/250.11 EPA 8260D/5030BNDXylenes, total mg/kg dry 2/6/252/6/250.36 EPA 8260D/5030BNDGasoline Range Organics Project Name: McWane Ductile Tank CtF WO#: 25B0386 www.ChemtechFord.com Page 5 of 7Page 5 of 7 xx Chemtech-Ford Laboratories Serving the Intermountain West Since 1953 Certificate of Analysis 9632 South 500 West Sandy, UT 84070 O:(801) 262-7299 F: (866) 792-0093 www.ChemtechFord.com Tetra Tech Inc. Richie Torney 4750 W 2100 S, Suite 400 Salt Lake City, UT 84120 PO#: Receipt: Date Reported: Project Name: 117-353100-25002 2/5/25 14:30 @ 13.1 °C 2/14/2025 McWane Ductile Tank Report Footnotes Abbreviations ND = Not detected at the corresponding Minimum Reporting Limit (MRL). 1 mg/L = one milligram per liter or 1 mg/kg = one milligram per kilogram = 1 part per million. 1 ug/L = one microgram per liter or 1 ug/kg = one microgram per kilogram = 1 part per billion. 1 ng/L = one nanogram per liter or 1 ng/kg = one nanogram per kilogram = 1 part per trillion. On calculated parameters, there may be a slight difference between summing the rounded values shown on the report vs the unrounded values used in the calculation. Project Name: McWane Ductile Tank CtF WO#: 25B0386 www.ChemtechFord.com Page 6 of 7Page 6 of 7 Page 7 of 7