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HomeMy WebLinkAboutDERR-2025-0006331 FACILITY ID# . PETROLEUM STORAGE TANK PERMANENT CLOSURE NOTICE … State Use Only Date Processed by Date Mailed to LHD LUST ID# Date to LUST Review Closure Notice prepared at the request of the owner/operator (identified below) by of (company name) Phone # Address City State Zip TANKS CLOSED Piping Only Tank # Please complete for each tank Type (Steel,FRP,etc.) Date Installed Capacity (Gallons) Substance stored* Date last operated Date Closed Removed/In Place/Change in Service (CIS)? *Indicate the specific substance stored in each tank to be closed (regular, unleaded, diesel, waste oil, etc.) CLOSURE INFORMATION Fuel was emptied Sludge was removed Tank was cleaned Tank was: Purged Inerted Method Used: Location of Closure Records: For In-Place Closure: tanks filled with: For Change-In-Service: Substance to be stored: FACILITY INFORMATION Tank Owner Phone # Address City State Zip Facility Name Address City State Zip Contact person Phone # Total number of regulated petroleum storage tanks at this site before closure Total number of regulated petroleum storage tanks at this site after closure TANK REMOVER Name Cert. # TR Exp. Date Company Phone # Address City State Zip SOIL/GROUNDWATER SAMPLER Name Cert. # GS Exp. Date Company Phone # Address City State Zip Stantec Consulting Services, Inc. (801) 261- 0090 Josie Messersmith 2890 East Cottonwood Parkway, Suite 300 Salt Lake City UT 84121 7-Eleven, Inc. PO Box 711 (Loc. 0148)Dallas TX 75221-0711 7-Eleven Store No. 25117 287 West 3300 South South Salt Lake UT 84115 3 0 2 31 steel steel steel 4/15/1984 4/15/1984 4/15/1984 10,000 10,000 10,000 GASOLINE GASOLINE GASOLINE 10/22/2024 10/22/2024 10/22/2024 10/10/2024 10/10/2024 REMOVAL REMOVAL REMOVAL Traci Gee 0464 8/16/2025 ET Technologies 801-977-0731 3110 W. California Ave, Ste D Salt Lake City UT 84104 Steve Yorgason Stantec Consulting Services, Inc.(801) 261-0090 2890 East Cottonwood Parkway, Suite 300 Salt Lake City UT 84121 dry ice x x x Stantec Consulting Services Inc. NA NA 4001039 Marc Westfall (214) 415 -0146 (214) 415-0146 10/10/2024 X 1630 4/15/2025 1/16/2025 2 DISPOSAL SITES USED Location Name Contact Name Phone # Date Amount Tank(s) Tank # Product From Tank(s) Contaminated Water From Tank Cleaning Sludge Contaminated Water From Excavation Contaminated Soil SITE ASSESSMENT Complete the Facility Site Plat (Closure Notice) and Sample Information Table (Closure Notice) on pages 3 and 4 to show the locations, depths, and other information on all soil/groundwater samples taken for closure. The samples must be consistently identified by sample ID # on the site plat, table, and lab analysis report. Completed Facility Site Plat (Closure Notice) is attached. The following must be included (enter the distance, and direction (N,S,E,W) from the area of contamination or, where applicable, use OH for overhead, NP for not present): Water Line Sewer Line Telephone Samples were properly: Collected Labeled Packaged Transported Samples were in sight of the person in custody at all times or in a secured locked place. I certify under penalty of law that the closure site assessment at this facility was conducted in accordance with 40 CFR 280.52, 40 CFR 280.72, and U.A.C. R311-205, and that any additional samples required by 40 CFR 280.52, 40 CFR 280.72 and U.A.C. R311-205-2(1)(a) were properly collected. Signature of Certified Groundwater/Soil Sampler Full name of Certified Sampler Date If contamination at the facility is confirmed, any person providing remedial assistance for a fee must be a Certified UST Consultant. The Certified UST Consultant providing assistance is: CERTIFIED UST CONSULTANT Name Cert. #CC Exp. Date Company Address City State Zip Phone # Please explain any unusual circumstances that occurred during the site assessment or closure: Stantec Consulting Services Inc. 2890 East Cottonwood Parkway, Suite 33 Salt Lake City UT 83279 801-261-0090 Metro Group Office (435) 623-3408 310/22/2024 de minimis -------- NA NA NA -- -- -- -- -- ---- -- -- -- -- -- STC Industrial Services Inc Shane Adolf (801) 595-8151 X 250 G10/14/2024 X X X X X X X X NP NP NP Natural Gas NP Storm Drain UK Completed Sample Information Table (Closure Notice) is attached. Certified lab analytical environmental sample results are attached. Unified Soil Classification (USC) sample results are attached. Chain of Custody form is attached. X Anna Skinner 0271 12/31/2026 Release identified based on groundwater analytical data. Field screening did not indicate a release. Release assigned ID OMA to Hong-Lei Tao. Steve Yorgason 01-15-2025 The original SS-6 sample presented in the Closure Plan was not collected as the piping layout was different than expected. The SS-6 sample included in this Closure Notice is a duplicate collected at the SS-5 location. 3 Facility Site Plat (Closure Notice) The site plat must be drawn to an appropriate identified scale. It must show planned sampling locations, substances stored in tanks, and other relevant information. Tank and sample identification numbers must be consistent with the information given on p. 1 and 4 of the Closure Notice. Facility ID: Drawn By: Date: X = Sample locations (SS-#, WS-#, USC-#) Site Plat Must Indicate Actual Locations Of: 0 = Monitoring Wells (MW-#) √Current & former tanks, piping & dispensers = Soil boring (SB-#), or Geoprobe Boring (GP-#) √ Location of all samples to be taken ●= Water Wells (domestic, livestock, etc.)√ Buildings, fences, & property boundaries Slope of Surface Topography: (N,NW,W,SW,S,SE,E,NE)√ Utility conduits (sewers, gas, water, storm drains, electrical, etc.) Land Use At Site: Residential Commercial Industrial √ Depth to groundwater (if encountered) Surrounding Land: Residential Commercial Industrial √Excavations, GW monitoring wells & soil stockpiles North Scale: 1”= Feet SEE ATTACHED SITE PLAT 4 SAMPLE INFORMATION TABLE (Closure Notice) Complete table for all samples that were taken for closure. Sample ID numbers on the table must be consistent with the sample ID numbers given on the site plat and in the lab analysis report. 1 Soil (SS), Groundwater (GW), or Unified Soil Classification (USC).2 Final depth (in feet) below grade at which samples were taken.3 Contaminant compound(s) analyzed for each sample (TPH, BTEXN, O&G, etc). 4 Appropriate analysis methods for contaminant compound(s) in each sample State Certified Laboratory used Address City State Zip Contact Person Phone # I certify under penalty of law that I am the Owner of the tank(s) described above and that I am familiar with the information on this form and that it is true, accurate and complete and further, that the procedures described herein were followed during tank closure. Signature of PST owner Full Name of owner Date Return completed Closure Notice form, Facility Site Plat and Sample Information Table, Soil/Groundwater sample lab analysis results, USC sample results, and Chain of Custody form within 90 days of PST Closure to: Mailing Address: State of Utah Dept. of Environmental Quality DERR / PST Section P.O. Box 144840 Salt Lake City, Utah 84114-4840 Sample # Substance stored in tank Sample type1 Depth2 Compounds3 Analysis method(s)4 Street Address: Multi Agency State Office Building 195 North 1950 West (First Floor) Salt Lake City, Utah 84116 SS-1 SS-2 SS-3 SS-4 SS-5 SS-6 (SS-5 duplicate) gasoline gasoline gasoline gasoline gasoline gasoline SS SS SS SS SS SS 6.5 6.5 4 4 4 4 MBTEXN and GRO MBTEXN and GRO MBTEXN and GRO MBTEXN and GRO MBTEXN and GRO MBTEXN and GRO 8260 8260 8260 8260 8260 ASTM-D2487 ASTM-D2487 8260 8260 ASTM-D2487 Pace National Analytical 12065 Lebanon Road Mt. Juliet UT 37122 Marty Edwards (615) 758-5858 SS-7 gasoline SS 4 MBTEXN and GRO 8260 8260 USC-1 USC-2 USC-3 gasoline and diesel gasoline and diesel USC USC USC 6.5 4 4 USC USC USC gasoline and diesel Marc Westfall GW-1 gasoline SS GW-2 gasoline SS 6.5 6.5 MBTEXN and GRO MBTEXN and GRO 1/15/25 UE UE UE UE UE UE UE UE UE UE CONCRETE GRASS SIGN CONCRETE GRASS LIGHT POLE SIDEWALK CONCRETE SIDEWALK SEWERTRAFFIC POLE PP PP PP PP PPPPPP PP PP PP C O N C R E T E ELEVEN 7-ELEVEN STORE No.25117 CONCRETE PARKING SIDEWALK PHONES GR A S S SI D E W A L K SI G N CANOPY LIGHT POLE FIRE HYDRANT 30 0 W E S T 330 SOUTH WATER METER WATER METER ELECTRICAL BOX SI D E W A L K GAS METER LIGHT ELECTRICAL PANELS DUMPSTER VIC'S PERFORMANCE AUTOMOTIVE LIGHT POLE INDUSTRIAL PRODUCTS MFG. ELECTRIC POLE CONCRETE ASPHALT USTs AIR MW-1 MW-2 MW-3 PH-5 PH-8 PH-7 PH-4 PH-6 PH-3 PH-2 PH-1 SS-7 SS-5/SS-6 SS-4/USC-3 SS-3/USC-2 GW-1 SS-2 SS-1/USC-1 GW-2 FOR: No warranty is made by Stantec Consulting Services Inc. as to the accuracy, reliability, or completeness of these data. Original data were compiled from various sources. This information may not meet National Map Accuracy Standards. This product was developed electronically, and may be updated without notification. Any reproduction may result in a loss of scale and or information. STA/AS AS SY 01/15/25 1SITE PLAN JOB NUMBER:DRAWN BY:CHECKED BY:APPROVED BY:DATE: FIGURE: 203724138 ELEVEN PHONE: 2890 E COTTONWOOD PKWY, STE 300 SALT LAKE CITY, UTAH (801) 261-0090 7-ELEVEN STORE No.25117 287 WEST 3300 SOUTH SALT LAKE CITY, UTAH MW-1 ABANDONED MONITORING WELL LOCATION PH-4 PROBEHOLE LOCATION LEGEND N 0 30 60 APPROXIMATE SCALE IN FEET SS = CLOSURE SOIL SAMPLE LOCATION GW = CLOSURE GROUNDWATER SAMPLE LOCATION USC = UNIFIED SOIL CLASSIFICATION SYSTEM SAMPLE LOCATION OVERHEAD ELECTRIC LINE ELECTRIC LINE GAS LINE STORM DRAIN WATER LINE UNKNOWN UTILITY LINE PRODUCT RETURN LINEPP ANALYTICAL REPORT November 05, 2024 Stantec - 7-11 (Direct) Sample Delivery Group:L1792023 Samples Received:10/24/2024 Project Number:203724138 Description:7-11#25117 South Salt Lake, UT Site:25117 Report To:Anna Skinner 2890 E Cottonwood Pkwy Suite 300 Salt Lake City, UT 84121 Entire Report Reviewed By: November 05, 2024 [Preliminary Report] Marty Edwards III Project Manager Results relate only to the items tested or calibrated and are reported as rounded values. This test report shall not be reproduced, except in full, without written approval of the laboratory. Where applicable, sampling conducted by Pace Analytical National is performed per guidance provided in laboratory standard operating procedures ENV-SOP-MTJL-0067 and ENV-SOP-MTJL-0068. Where sampling conducted by the customer, results relate to the accuracy of the information provided, and as the samples are received. Pace Analytical National 12065 Lebanon Rd Mount Juliet, TN 37122 615-758-5858 800-767-5859 mydata.pacelabs.com 1 Cp 2 Tc 3 Ss 4 Cn 5 Sr 6 Qc 7 Gl 8 Al 9 Sc ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE: Stantec - 7-11 (Direct)203724138 L1792023 11/05/24 11:53 1 of 24 November 05, 2024 Marty Edwards III Project Manager ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE: Stantec - 7-11 (Direct)203724138 L1792023 11/05/24 12:32 1 of 24 TABLE OF CONTENTS Cp: Cover Page 1 Tc: Table of Contents 2 Ss: Sample Summary 3 Cn: Case Narrative 5 Sr: Sample Results 6 SS-1 L1792023-01 6 SS-2 L1792023-02 7 SS-3 L1792023-03 8 SS-4 L1792023-04 9 SS-5 L1792023-05 10 SS-6 L1792023-06 11 SS-7 L1792023-07 12 GW-1 L1792023-08 13 GW-2 L1792023-09 14 Qc: Quality Control Summary 15 Total Solids by Method 2540 G-2011 15 Volatile Organic Compounds (GC/MS) by Method 8260B 17 Volatile Organic Compounds (GC/MS) by Method 8260B/8260B/OA1 18 Gl: Glossary of Terms 21 Al: Accreditations & Locations 22 Sc: Sample Chain of Custody 23 1 Cp 2 Tc 3 Ss 4 Cn 5 Sr 6 Qc 7 Gl 8 Al 9 Sc ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE: Stantec - 7-11 (Direct)203724138 L1792023 11/05/24 11:53 2 of 24 ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE: Stantec - 7-11 (Direct)203724138 L1792023 11/05/24 12:32 2 of 24 SAMPLE SUMMARY Collected by Collected date/time Received date/time SS-1 L1792023-01 Solid Steve Y.10/22/24 11:30 10/24/24 08:00 Method Batch Dilution Preparation Analysis Analyst Location date/time date/time Total Solids by Method 2540 G-2011 WG2388943 1 10/25/24 13:00 10/25/24 13:10 MT Mt. Juliet, TN Volatile Organic Compounds (GC/MS) by Method 8260B/8260B/OA1 WG2392769 1 10/27/24 11:44 10/31/24 07:48 ADM Mt. Juliet, TN Collected by Collected date/time Received date/time SS-2 L1792023-02 Solid Steve Y.10/22/24 11:15 10/24/24 08:00 Method Batch Dilution Preparation Analysis Analyst Location date/time date/time Total Solids by Method 2540 G-2011 WG2388943 1 10/25/24 13:00 10/25/24 13:10 MT Mt. Juliet, TN Volatile Organic Compounds (GC/MS) by Method 8260B/8260B/OA1 WG2392348 1 10/27/24 11:44 10/30/24 14:39 JAH Mt. Juliet, TN Collected by Collected date/time Received date/time SS-3 L1792023-03 Solid Steve Y.10/22/24 16:00 10/24/24 08:00 Method Batch Dilution Preparation Analysis Analyst Location date/time date/time Total Solids by Method 2540 G-2011 WG2388943 1 10/25/24 13:00 10/25/24 13:10 MT Mt. Juliet, TN Volatile Organic Compounds (GC/MS) by Method 8260B/8260B/OA1 WG2392348 1 10/27/24 11:44 10/30/24 15:00 JAH Mt. Juliet, TN Collected by Collected date/time Received date/time SS-4 L1792023-04 Solid Steve Y.10/22/24 15:34 10/24/24 08:00 Method Batch Dilution Preparation Analysis Analyst Location date/time date/time Total Solids by Method 2540 G-2011 WG2388943 1 10/25/24 13:00 10/25/24 13:10 MT Mt. Juliet, TN Volatile Organic Compounds (GC/MS) by Method 8260B/8260B/OA1 WG2392348 1 10/27/24 11:44 10/30/24 15:21 JAH Mt. Juliet, TN Collected by Collected date/time Received date/time SS-5 L1792023-05 Solid Steve Y.10/22/24 15:40 10/24/24 08:00 Method Batch Dilution Preparation Analysis Analyst Location date/time date/time Total Solids by Method 2540 G-2011 WG2388943 1 10/25/24 13:00 10/25/24 13:10 MT Mt. Juliet, TN Volatile Organic Compounds (GC/MS) by Method 8260B/8260B/OA1 WG2392769 1 10/27/24 11:44 10/31/24 08:09 ADM Mt. Juliet, TN Collected by Collected date/time Received date/time SS-6 L1792023-06 Solid Steve Y.10/22/24 16:30 10/24/24 08:00 Method Batch Dilution Preparation Analysis Analyst Location date/time date/time Total Solids by Method 2540 G-2011 WG2388943 1 10/25/24 13:00 10/25/24 13:10 MT Mt. Juliet, TN Volatile Organic Compounds (GC/MS) by Method 8260B/8260B/OA1 WG2392348 1 10/27/24 11:44 10/30/24 15:42 JAH Mt. Juliet, TN Collected by Collected date/time Received date/time SS-7 L1792023-07 Solid Steve Y.10/22/24 15:45 10/24/24 08:00 Method Batch Dilution Preparation Analysis Analyst Location date/time date/time Total Solids by Method 2540 G-2011 WG2388945 1 10/25/24 08:14 10/25/24 08:25 KDW Mt. Juliet, TN Volatile Organic Compounds (GC/MS) by Method 8260B/8260B/OA1 WG2392348 1 10/27/24 11:44 10/30/24 16:03 JAH Mt. Juliet, TN 1 Cp 2 Tc 3 Ss 4 Cn 5 Sr 6 Qc 7 Gl 8 Al 9 Sc ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE: Stantec - 7-11 (Direct)203724138 L1792023 11/05/24 11:53 3 of 24 ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE: Stantec - 7-11 (Direct)203724138 L1792023 11/05/24 12:32 3 of 24 SAMPLE SUMMARY Collected by Collected date/time Received date/time GW-1 L1792023-08 GW Steve Y.10/22/24 12:30 10/24/24 08:00 Method Batch Dilution Preparation Analysis Analyst Location date/time date/time Volatile Organic Compounds (GC/MS) by Method 8260B WG2395246 25 11/05/24 04:40 11/05/24 04:40 ACG Mt. Juliet, TN Volatile Organic Compounds (GC/MS) by Method 8260B/8260B/OA1 WG2394648 1 11/03/24 20:46 11/03/24 20:46 ACG Mt. Juliet, TN Collected by Collected date/time Received date/time GW-2 L1792023-09 GW Steve Y.10/22/24 11:45 10/24/24 08:00 Method Batch Dilution Preparation Analysis Analyst Location date/time date/time Volatile Organic Compounds (GC/MS) by Method 8260B/8260B/OA1 WG2394648 10 11/04/24 01:20 11/04/24 01:20 ACG Mt. Juliet, TN 1 Cp 2 Tc 3 Ss 4 Cn 5 Sr 6 Qc 7 Gl 8 Al 9 Sc ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE: Stantec - 7-11 (Direct)203724138 L1792023 11/05/24 11:53 4 of 24 ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE: Stantec - 7-11 (Direct)203724138 L1792023 11/05/24 12:32 4 of 24 CASE NARRATIVE All sample aliquots were received at the correct temperature, in the proper containers, with the appropriate preservatives, and within method specified holding times, unless qualified or notated within the report. Where applicable, all MDL (LOD) and RDL (LOQ) values reported for environmental samples have been corrected for the dilution factor used in the analysis. All Method and Batch Quality Control are within established criteria except where addressed in this case narrative, a non-conformance form or properly qualified within the sample results. By my digital signature below, I affirm to the best of my knowledge, all problems/anomalies observed by the laboratory as having the potential to affect the quality of the data have been identified by the laboratory, and no information or data have been knowingly withheld that would affect the quality of the data. [Preliminary Report] Marty Edwards III Project Manager Sample Delivery Group (SDG) Narrative pH outside of method requirement. Lab Sample ID Project Sample ID Method L1792023-08 GW-1 8260B, 8260B/8260B/OA1 1 Cp 2 Tc 3 Ss 4 Cn 5 Sr 6 Qc 7 Gl 8 Al 9 Sc ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE: Stantec - 7-11 (Direct)203724138 L1792023 11/05/24 11:53 5 of 24 Marty Edwards III Project Manager ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE: Stantec - 7-11 (Direct)203724138 L1792023 11/05/24 12:32 5 of 24 SAMPLE RESULTS - 01 L1792023 SS-1 Collected date/time: 10/22/24 11:30 Total Solids by Method 2540 G-2011 Result Qualifier Dilution Analysis Batch Analyte %date / time Total Solids 81.4 1 10/25/2024 13:10 WG2388943 Volatile Organic Compounds (GC/MS) by Method 8260B/8260B/OA1 Result Qualifier RDL Dilution Analysis Batch Analyte mg/kg mg/kg date / time TPH (GC/MS) Low Fraction 1.56 0.500 1 10/31/2024 07:48 WG2392769 Benzene 0.00122 0.00100 1 10/31/2024 07:48 WG2392769 Toluene ND 0.00500 1 10/31/2024 07:48 WG2392769 Ethylbenzene 0.00693 0.00100 1 10/31/2024 07:48 WG2392769 Xylenes, Total ND 0.00300 1 10/31/2024 07:48 WG2392769 Methyl tert-butyl ether ND 0.00100 1 10/31/2024 07:48 WG2392769 Naphthalene 0.0286 0.00500 1 10/31/2024 07:48 WG2392769 (S) Toluene-d8 104 75.0-131 10/31/2024 07:48 WG2392769 (S) 4-Bromofluorobenzene 94.3 67.0-138 10/31/2024 07:48 WG2392769 (S) 1,2-Dichloroethane-d4 124 70.0-130 10/31/2024 07:48 WG2392769 1 Cp 2 Tc 3 Ss 4 Cn 5 Sr 6 Qc 7 Gl 8 Al 9 Sc ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE: Stantec - 7-11 (Direct)203724138 L1792023 11/05/24 11:53 6 of 24 ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE: Stantec - 7-11 (Direct)203724138 L1792023 11/05/24 12:32 6 of 24 SAMPLE RESULTS - 02 L1792023 SS-2 Collected date/time: 10/22/24 11:15 Total Solids by Method 2540 G-2011 Result Qualifier Dilution Analysis Batch Analyte %date / time Total Solids 90.7 1 10/25/2024 13:10 WG2388943 Volatile Organic Compounds (GC/MS) by Method 8260B/8260B/OA1 Result Qualifier RDL Dilution Analysis Batch Analyte mg/kg mg/kg date / time TPH (GC/MS) Low Fraction ND 0.500 1 10/30/2024 14:39 WG2392348 Benzene ND 0.00100 1 10/30/2024 14:39 WG2392348 Toluene ND 0.00500 1 10/30/2024 14:39 WG2392348 Ethylbenzene ND 0.00100 1 10/30/2024 14:39 WG2392348 Xylenes, Total ND 0.00300 1 10/30/2024 14:39 WG2392348 Methyl tert-butyl ether ND 0.00100 1 10/30/2024 14:39 WG2392348 Naphthalene ND 0.00500 1 10/30/2024 14:39 WG2392348 (S) Toluene-d8 106 75.0-131 10/30/2024 14:39 WG2392348 (S) 4-Bromofluorobenzene 103 67.0-138 10/30/2024 14:39 WG2392348 (S) 1,2-Dichloroethane-d4 118 70.0-130 10/30/2024 14:39 WG2392348 1 Cp 2 Tc 3 Ss 4 Cn 5 Sr 6 Qc 7 Gl 8 Al 9 Sc ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE: Stantec - 7-11 (Direct)203724138 L1792023 11/05/24 11:53 7 of 24 ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE: Stantec - 7-11 (Direct)203724138 L1792023 11/05/24 12:32 7 of 24 SAMPLE RESULTS - 03 L1792023 SS-3 Collected date/time: 10/22/24 16:00 Total Solids by Method 2540 G-2011 Result Qualifier Dilution Analysis Batch Analyte %date / time Total Solids 81.6 1 10/25/2024 13:10 WG2388943 Volatile Organic Compounds (GC/MS) by Method 8260B/8260B/OA1 Result Qualifier RDL Dilution Analysis Batch Analyte mg/kg mg/kg date / time TPH (GC/MS) Low Fraction ND 0.500 1 10/30/2024 15:00 WG2392348 Benzene 0.00113 0.00100 1 10/30/2024 15:00 WG2392348 Toluene ND 0.00500 1 10/30/2024 15:00 WG2392348 Ethylbenzene 0.00180 0.00100 1 10/30/2024 15:00 WG2392348 Xylenes, Total 0.0266 0.00300 1 10/30/2024 15:00 WG2392348 Methyl tert-butyl ether ND 0.00100 1 10/30/2024 15:00 WG2392348 Naphthalene 0.0308 0.00500 1 10/30/2024 15:00 WG2392348 (S) Toluene-d8 104 75.0-131 10/30/2024 15:00 WG2392348 (S) 4-Bromofluorobenzene 104 67.0-138 10/30/2024 15:00 WG2392348 (S) 1,2-Dichloroethane-d4 114 70.0-130 10/30/2024 15:00 WG2392348 1 Cp 2 Tc 3 Ss 4 Cn 5 Sr 6 Qc 7 Gl 8 Al 9 Sc ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE: Stantec - 7-11 (Direct)203724138 L1792023 11/05/24 11:53 8 of 24 ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE: Stantec - 7-11 (Direct)203724138 L1792023 11/05/24 12:32 8 of 24 SAMPLE RESULTS - 04 L1792023 SS-4 Collected date/time: 10/22/24 15:34 Total Solids by Method 2540 G-2011 Result Qualifier Dilution Analysis Batch Analyte %date / time Total Solids 88.9 1 10/25/2024 13:10 WG2388943 Volatile Organic Compounds (GC/MS) by Method 8260B/8260B/OA1 Result Qualifier RDL Dilution Analysis Batch Analyte mg/kg mg/kg date / time TPH (GC/MS) Low Fraction ND 0.500 1 10/30/2024 15:21 WG2392348 Benzene 0.00142 0.00100 1 10/30/2024 15:21 WG2392348 Toluene ND 0.00500 1 10/30/2024 15:21 WG2392348 Ethylbenzene ND 0.00100 1 10/30/2024 15:21 WG2392348 Xylenes, Total ND 0.00300 1 10/30/2024 15:21 WG2392348 Methyl tert-butyl ether ND 0.00100 1 10/30/2024 15:21 WG2392348 Naphthalene ND 0.00500 1 10/30/2024 15:21 WG2392348 (S) Toluene-d8 104 75.0-131 10/30/2024 15:21 WG2392348 (S) 4-Bromofluorobenzene 103 67.0-138 10/30/2024 15:21 WG2392348 (S) 1,2-Dichloroethane-d4 119 70.0-130 10/30/2024 15:21 WG2392348 1 Cp 2 Tc 3 Ss 4 Cn 5 Sr 6 Qc 7 Gl 8 Al 9 Sc ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE: Stantec - 7-11 (Direct)203724138 L1792023 11/05/24 11:53 9 of 24 ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE: Stantec - 7-11 (Direct)203724138 L1792023 11/05/24 12:32 9 of 24 SAMPLE RESULTS - 05 L1792023 SS-5 Collected date/time: 10/22/24 15:40 Total Solids by Method 2540 G-2011 Result Qualifier Dilution Analysis Batch Analyte %date / time Total Solids 84.9 1 10/25/2024 13:10 WG2388943 Volatile Organic Compounds (GC/MS) by Method 8260B/8260B/OA1 Result Qualifier RDL Dilution Analysis Batch Analyte mg/kg mg/kg date / time TPH (GC/MS) Low Fraction ND 0.500 1 10/31/2024 08:09 WG2392769 Benzene ND 0.00100 1 10/31/2024 08:09 WG2392769 Toluene ND 0.00500 1 10/31/2024 08:09 WG2392769 Ethylbenzene ND 0.00100 1 10/31/2024 08:09 WG2392769 Xylenes, Total ND 0.00300 1 10/31/2024 08:09 WG2392769 Methyl tert-butyl ether ND 0.00100 1 10/31/2024 08:09 WG2392769 Naphthalene 0.0146 0.00500 1 10/31/2024 08:09 WG2392769 (S) Toluene-d8 107 75.0-131 10/31/2024 08:09 WG2392769 (S) 4-Bromofluorobenzene 111 67.0-138 10/31/2024 08:09 WG2392769 (S) 1,2-Dichloroethane-d4 117 70.0-130 10/31/2024 08:09 WG2392769 1 Cp 2 Tc 3 Ss 4 Cn 5 Sr 6 Qc 7 Gl 8 Al 9 Sc ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE: Stantec - 7-11 (Direct)203724138 L1792023 11/05/24 11:53 10 of 24 ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE: Stantec - 7-11 (Direct)203724138 L1792023 11/05/24 12:32 10 of 24 SAMPLE RESULTS - 06 L1792023 SS-6 Collected date/time: 10/22/24 16:30 Total Solids by Method 2540 G-2011 Result Qualifier Dilution Analysis Batch Analyte %date / time Total Solids 82.1 1 10/25/2024 13:10 WG2388943 Volatile Organic Compounds (GC/MS) by Method 8260B/8260B/OA1 Result Qualifier RDL Dilution Analysis Batch Analyte mg/kg mg/kg date / time TPH (GC/MS) Low Fraction ND 0.500 1 10/30/2024 15:42 WG2392348 Benzene ND 0.00100 1 10/30/2024 15:42 WG2392348 Toluene ND 0.00500 1 10/30/2024 15:42 WG2392348 Ethylbenzene ND 0.00100 1 10/30/2024 15:42 WG2392348 Xylenes, Total 0.00491 0.00300 1 10/30/2024 15:42 WG2392348 Methyl tert-butyl ether ND 0.00100 1 10/30/2024 15:42 WG2392348 Naphthalene 0.0119 0.00500 1 10/30/2024 15:42 WG2392348 (S) Toluene-d8 108 75.0-131 10/30/2024 15:42 WG2392348 (S) 4-Bromofluorobenzene 106 67.0-138 10/30/2024 15:42 WG2392348 (S) 1,2-Dichloroethane-d4 116 70.0-130 10/30/2024 15:42 WG2392348 1 Cp 2 Tc 3 Ss 4 Cn 5 Sr 6 Qc 7 Gl 8 Al 9 Sc ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE: Stantec - 7-11 (Direct)203724138 L1792023 11/05/24 11:53 11 of 24 ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE: Stantec - 7-11 (Direct)203724138 L1792023 11/05/24 12:32 11 of 24 SAMPLE RESULTS - 07 L1792023 SS-7 Collected date/time: 10/22/24 15:45 Total Solids by Method 2540 G-2011 Result Qualifier Dilution Analysis Batch Analyte %date / time Total Solids 89.8 1 10/25/2024 08:25 WG2388945 Volatile Organic Compounds (GC/MS) by Method 8260B/8260B/OA1 Result Qualifier RDL Dilution Analysis Batch Analyte mg/kg mg/kg date / time TPH (GC/MS) Low Fraction ND 0.500 1 10/30/2024 16:03 WG2392348 Benzene ND 0.00100 1 10/30/2024 16:03 WG2392348 Toluene ND 0.00500 1 10/30/2024 16:03 WG2392348 Ethylbenzene ND 0.00100 1 10/30/2024 16:03 WG2392348 Xylenes, Total ND 0.00300 1 10/30/2024 16:03 WG2392348 Methyl tert-butyl ether ND 0.00100 1 10/30/2024 16:03 WG2392348 Naphthalene ND 0.00500 1 10/30/2024 16:03 WG2392348 (S) Toluene-d8 105 75.0-131 10/30/2024 16:03 WG2392348 (S) 4-Bromofluorobenzene 105 67.0-138 10/30/2024 16:03 WG2392348 (S) 1,2-Dichloroethane-d4 120 70.0-130 10/30/2024 16:03 WG2392348 1 Cp 2 Tc 3 Ss 4 Cn 5 Sr 6 Qc 7 Gl 8 Al 9 Sc ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE: Stantec - 7-11 (Direct)203724138 L1792023 11/05/24 11:53 12 of 24 ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE: Stantec - 7-11 (Direct)203724138 L1792023 11/05/24 12:32 12 of 24 SAMPLE RESULTS - 08 L1792023 GW-1 Collected date/time: 10/22/24 12:30 Volatile Organic Compounds (GC/MS) by Method 8260B/8260B/OA1 Result Qualifier RDL Dilution Analysis Batch Analyte mg/l mg/l date / time TPH (GC/MS) Low Fraction 10.4 0.500 1 11/03/2024 20:46 WG2394648 Benzene 0.0737 0.00100 1 11/03/2024 20:46 WG2394648 Toluene 0.942 0.0250 25 11/05/2024 04:40 WG2395246 Ethylbenzene 0.674 0.0250 25 11/05/2024 04:40 WG2395246 Xylenes, Total 4.06 0.0750 25 11/05/2024 04:40 WG2395246 Methyl tert-butyl ether ND 0.00100 1 11/03/2024 20:46 WG2394648 Naphthalene 0.684 0.125 25 11/05/2024 04:40 WG2395246 (S) Toluene-d8 102 80.0-120 11/03/2024 20:46 WG2394648 (S) Toluene-d8 109 80.0-120 11/05/2024 04:40 WG2395246 (S) 4-Bromofluorobenzene 106 77.0-126 11/03/2024 20:46 WG2394648 (S) 4-Bromofluorobenzene 103 77.0-126 11/05/2024 04:40 WG2395246 (S) 1,2-Dichloroethane-d4 121 70.0-130 11/03/2024 20:46 WG2394648 (S) 1,2-Dichloroethane-d4 114 70.0-130 11/05/2024 04:40 WG2395246 1 Cp 2 Tc 3 Ss 4 Cn 5 Sr 6 Qc 7 Gl 8 Al 9 Sc ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE: Stantec - 7-11 (Direct)203724138 L1792023 11/05/24 11:53 13 of 24 ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE: Stantec - 7-11 (Direct)203724138 L1792023 11/05/24 12:32 13 of 24 SAMPLE RESULTS - 09 L1792023 GW-2 Collected date/time: 10/22/24 11:45 Volatile Organic Compounds (GC/MS) by Method 8260B/8260B/OA1 Result Qualifier RDL Dilution Analysis Batch Analyte mg/l mg/l date / time TPH (GC/MS) Low Fraction 13.6 5.00 10 11/04/2024 01:20 WG2394648 Benzene 0.0573 0.0100 10 11/04/2024 01:20 WG2394648 Toluene 0.764 0.0100 10 11/04/2024 01:20 WG2394648 Ethylbenzene 0.571 0.0100 10 11/04/2024 01:20 WG2394648 Xylenes, Total 3.36 0.0300 10 11/04/2024 01:20 WG2394648 Methyl tert-butyl ether ND 0.0100 10 11/04/2024 01:20 WG2394648 Naphthalene 0.636 0.0500 10 11/04/2024 01:20 WG2394648 (S) Toluene-d8 105 80.0-120 11/04/2024 01:20 WG2394648 (S) 4-Bromofluorobenzene 103 77.0-126 11/04/2024 01:20 WG2394648 (S) 1,2-Dichloroethane-d4 122 70.0-130 11/04/2024 01:20 WG2394648 1 Cp 2 Tc 3 Ss 4 Cn 5 Sr 6 Qc 7 Gl 8 Al 9 Sc ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE: Stantec - 7-11 (Direct)203724138 L1792023 11/05/24 11:53 14 of 24 ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE: Stantec - 7-11 (Direct)203724138 L1792023 11/05/24 12:32 14 of 24 QUALITY CONTROL SUMMARYWG2388943 Total Solids by Method 2540 G-2011 L1792023-01,02,03,04,05,06 Method Blank (MB) (MB) R4137972-1 10/25/24 13:10 MB Result MB Qualifier MB MDL MB RDL Analyte %%% Total Solids 0.000 L1792023-04 Original Sample (OS) • Duplicate (DUP) (OS) L1792023-04 10/25/24 13:10 • (DUP) R4137972-3 10/25/24 13:10 Original Result DUP Result Dilution DUP RPD DUP Qualifier DUP RPD Limits Analyte %%%% Total Solids 88.9 85.4 1 4.03 10 Laboratory Control Sample (LCS) (LCS) R4137972-2 10/25/24 13:10 Spike Amount LCS Result LCS Rec.Rec. Limits LCS Qualifier Analyte %%%% Total Solids 50.0 50.0 100 90.0-110 1 Cp 2 Tc 3 Ss 4 Cn 5 Sr 6 Qc 7 Gl 8 Al 9 Sc ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE: Stantec - 7-11 (Direct)203724138 L1792023 11/05/24 11:53 15 of 24 ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE: Stantec - 7-11 (Direct)203724138 L1792023 11/05/24 12:32 15 of 24 QUALITY CONTROL SUMMARYWG2388945 Total Solids by Method 2540 G-2011 L1792023-07 Method Blank (MB) (MB) R4137957-1 10/25/24 08:25 MB Result MB Qualifier MB MDL MB RDL Analyte %%% Total Solids 0.00100 L1792054-01 Original Sample (OS) • Duplicate (DUP) (OS) L1792054-01 10/25/24 08:25 • (DUP) R4137957-3 10/25/24 08:25 Original Result DUP Result Dilution DUP RPD DUP Qualifier DUP RPD Limits Analyte %%%% Total Solids 92.5 92.8 1 0.284 10 Laboratory Control Sample (LCS) (LCS) R4137957-2 10/25/24 08:25 Spike Amount LCS Result LCS Rec.Rec. Limits LCS Qualifier Analyte %%%% Total Solids 50.0 50.0 100 90.0-110 1 Cp 2 Tc 3 Ss 4 Cn 5 Sr 6 Qc 7 Gl 8 Al 9 Sc ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE: Stantec - 7-11 (Direct)203724138 L1792023 11/05/24 11:53 16 of 24 ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE: Stantec - 7-11 (Direct)203724138 L1792023 11/05/24 12:32 16 of 24 QUALITY CONTROL SUMMARYWG2395246 Volatile Organic Compounds (GC/MS) by Method 8260B L1792023-08 Method Blank (MB) (MB) R4142079-4 11/04/24 23:15 MB Result MB Qualifier MB MDL MB RDL Analyte mg/l mg/l mg/l Toluene U 0.000278 0.00100 Ethylbenzene U 0.000137 0.00100 Xylenes, Total U 0.000174 0.00300 Naphthalene U 0.00100 0.00500 (S) Toluene-d8 110 80.0-120 (S) 4-Bromofluorobenzene 102 77.0-126 (S) 1,2-Dichloroethane-d4 121 70.0-130 Laboratory Control Sample (LCS) • Laboratory Control Sample Duplicate (LCSD) (LCS) R4142079-1 11/04/24 21:50 • (LCSD) R4142079-2 11/04/24 22:11 Spike Amount LCS Result LCSD Result LCS Rec.LCSD Rec.Rec. Limits LCS Qualifier LCSD Qualifier RPD RPD Limits Analyte mg/l mg/l mg/l %%%%% Toluene 0.00500 0.00523 0.00539 105 108 79.0-120 3.01 20 Ethylbenzene 0.00500 0.00471 0.00475 94.2 95.0 79.0-123 0.846 20 Xylenes, Total 0.0150 0.0143 0.0147 95.3 98.0 79.0-123 2.76 20 Naphthalene 0.00500 0.00612 0.00631 122 126 54.0-135 3.06 20 (S) Toluene-d8 107 107 80.0-120 (S) 4-Bromofluorobenzene 102 103 77.0-126 (S) 1,2-Dichloroethane-d4 121 124 70.0-130 1 Cp 2 Tc 3 Ss 4 Cn 5 Sr 6 Qc 7 Gl 8 Al 9 Sc ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE: Stantec - 7-11 (Direct)203724138 L1792023 11/05/24 11:53 17 of 24 ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE: Stantec - 7-11 (Direct)203724138 L1792023 11/05/24 12:32 17 of 24 QUALITY CONTROL SUMMARYWG2392348 Volatile Organic Compounds (GC/MS) by Method 8260B/8260B/OA1 L1792023-02,03,04,06,07 Method Blank (MB) (MB) R4140454-4 10/30/24 14:11 MB Result MB Qualifier MB MDL MB RDL Analyte mg/kg mg/kg mg/kg TPH (GC/MS) Low Fraction U 0.183 0.500 Benzene U 0.000375 0.00100 Toluene U 0.00123 0.00500 Ethylbenzene U 0.000300 0.00100 Xylenes, Total U 0.000500 0.00300 Methyl tert-butyl ether U 0.000350 0.00100 Naphthalene U 0.00498 0.00500 (S) Toluene-d8 111 75.0-131 (S) 4-Bromofluorobenzene 102 67.0-138 (S) 1,2-Dichloroethane-d4 106 70.0-130 Laboratory Control Sample (LCS) • Laboratory Control Sample Duplicate (LCSD) (LCS) R4140454-1 10/30/24 10:52 • (LCSD) R4140454-2 10/30/24 11:50 Spike Amount LCS Result LCSD Result LCS Rec.LCSD Rec.Rec. Limits LCS Qualifier LCSD Qualifier RPD RPD Limits Analyte mg/kg mg/kg mg/kg %%%%% Benzene 0.0250 0.0261 0.0243 104 97.2 70.0-123 7.14 20 Toluene 0.0250 0.0228 0.0217 91.2 86.8 75.0-121 4.94 20 Ethylbenzene 0.0250 0.0232 0.0216 92.8 86.4 74.0-126 7.14 20 Xylenes, Total 0.0750 0.0676 0.0635 90.1 84.7 72.0-127 6.25 20 Methyl tert-butyl ether 0.0250 0.0286 0.0264 114 106 66.0-132 8.00 20 Naphthalene 0.0250 0.0215 0.0206 86.0 82.4 59.0-130 4.28 20 (S) Toluene-d8 109 108 75.0-131 (S) 4-Bromofluorobenzene 106 104 67.0-138 (S) 1,2-Dichloroethane-d4 111 112 70.0-130 Laboratory Control Sample (LCS) (LCS) R4140454-3 10/30/24 13:08 Spike Amount LCS Result LCS Rec.Rec. Limits LCS Qualifier Analyte mg/kg mg/kg %% TPH (GC/MS) Low Fraction 5.00 4.31 86.2 52.0-154 (S) Toluene-d8 106 75.0-131 (S) 4-Bromofluorobenzene 110 67.0-138 (S) 1,2-Dichloroethane-d4 108 70.0-130 1 Cp 2 Tc 3 Ss 4 Cn 5 Sr 6 Qc 7 Gl 8 Al 9 Sc ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE: Stantec - 7-11 (Direct)203724138 L1792023 11/05/24 11:53 18 of 24 ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE: Stantec - 7-11 (Direct)203724138 L1792023 11/05/24 12:32 18 of 24 QUALITY CONTROL SUMMARYWG2392769 Volatile Organic Compounds (GC/MS) by Method 8260B/8260B/OA1 L1792023-01,05 Method Blank (MB) (MB) R4140720-2 10/31/24 02:52 MB Result MB Qualifier MB MDL MB RDL Analyte mg/kg mg/kg mg/kg TPH (GC/MS) Low Fraction U 0.183 0.500 Benzene U 0.000375 0.00100 Toluene U 0.00123 0.00500 Ethylbenzene U 0.000300 0.00100 Xylenes, Total U 0.000500 0.00300 Methyl tert-butyl ether U 0.000350 0.00100 Naphthalene U 0.00498 0.00500 (S) Toluene-d8 107 75.0-131 (S) 4-Bromofluorobenzene 96.4 67.0-138 (S) 1,2-Dichloroethane-d4 110 70.0-130 Laboratory Control Sample (LCS) (LCS) R4140720-1 10/31/24 01:49 Spike Amount LCS Result LCS Rec.Rec. Limits LCS Qualifier Analyte mg/kg mg/kg %% TPH (GC/MS) Low Fraction 5.00 5.16 103 52.0-154 (S) Toluene-d8 108 75.0-131 (S) 4-Bromofluorobenzene 113 67.0-138 (S) 1,2-Dichloroethane-d4 113 70.0-130 Laboratory Control Sample (LCS) (LCS) R4140720-3 10/31/24 06:59 Spike Amount LCS Result LCS Rec.Rec. Limits LCS Qualifier Analyte mg/kg mg/kg %% Benzene 0.0250 0.0213 85.2 70.0-123 Toluene 0.0250 0.0200 80.0 75.0-121 Ethylbenzene 0.0250 0.0194 77.6 74.0-126 Xylenes, Total 0.0750 0.0582 77.6 72.0-127 Methyl tert-butyl ether 0.0250 0.0243 97.2 66.0-132 Naphthalene 0.0250 0.0180 72.0 59.0-130 (S) Toluene-d8 113 75.0-131 (S) 4-Bromofluorobenzene 107 67.0-138 (S) 1,2-Dichloroethane-d4 111 70.0-130 1 Cp 2 Tc 3 Ss 4 Cn 5 Sr 6 Qc 7 Gl 8 Al 9 Sc ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE: Stantec - 7-11 (Direct)203724138 L1792023 11/05/24 11:53 19 of 24 ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE: Stantec - 7-11 (Direct)203724138 L1792023 11/05/24 12:32 19 of 24 QUALITY CONTROL SUMMARYWG2394648 Volatile Organic Compounds (GC/MS) by Method 8260B/8260B/OA1 L1792023-08,09 Method Blank (MB) (MB) R4141747-3 11/03/24 16:54 MB Result MB Qualifier MB MDL MB RDL Analyte mg/l mg/l mg/l TPH (GC/MS) Low Fraction U 0.108 0.500 Benzene U 0.0000941 0.00100 Toluene U 0.000278 0.00100 Ethylbenzene U 0.000137 0.00100 Xylenes, Total U 0.000174 0.00300 Methyl tert-butyl ether U 0.000101 0.00100 Naphthalene U 0.00100 0.00500 (S) Toluene-d8 106 80.0-120 (S) 4-Bromofluorobenzene 103 77.0-126 (S) 1,2-Dichloroethane-d4 122 70.0-130 Laboratory Control Sample (LCS) (LCS) R4141747-1 11/03/24 15:51 Spike Amount LCS Result LCS Rec.Rec. Limits LCS Qualifier Analyte mg/l mg/l %% Benzene 0.00500 0.00467 93.4 70.0-123 Toluene 0.00500 0.00515 103 79.0-120 Ethylbenzene 0.00500 0.00472 94.4 79.0-123 Xylenes, Total 0.0150 0.0142 94.7 79.0-123 Methyl tert-butyl ether 0.00500 0.00523 105 68.0-125 Naphthalene 0.00500 0.00646 129 54.0-135 (S) Toluene-d8 105 80.0-120 (S) 4-Bromofluorobenzene 105 77.0-126 (S) 1,2-Dichloroethane-d4 128 70.0-130 Laboratory Control Sample (LCS) (LCS) R4141747-2 11/03/24 16:12 Spike Amount LCS Result LCS Rec.Rec. Limits LCS Qualifier Analyte mg/l mg/l %% TPH (GC/MS) Low Fraction 5.00 4.63 92.6 66.0-132 (S) Toluene-d8 105 80.0-120 (S) 4-Bromofluorobenzene 106 77.0-126 (S) 1,2-Dichloroethane-d4 127 70.0-130 1 Cp 2 Tc 3 Ss 4 Cn 5 Sr 6 Qc 7 Gl 8 Al 9 Sc ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE: Stantec - 7-11 (Direct)203724138 L1792023 11/05/24 11:53 20 of 24 ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE: Stantec - 7-11 (Direct)203724138 L1792023 11/05/24 12:32 20 of 24 GLOSSARY OF TERMS Guide to Reading and Understanding Your Laboratory Report The information below is designed to better explain the various terms used in your report of analytical results from the Laboratory. This is not intended as a comprehensive explanation, and if you have additional questions please contact your project representative. Results Disclaimer - Information that may be provided by the customer, and contained within this report, include Permit Limits, Project Name, Sample ID, Sample Matrix, Sample Preservation, Field Blanks, Field Spikes, Field Duplicates, On-Site Data, Sampling Collection Dates/Times, and Sampling Location. Results relate to the accuracy of this information provided, and as the samples are received. Abbreviations and Definitions MDL Method Detection Limit. ND Not detected at the Reporting Limit (or MDL where applicable). RDL Reported Detection Limit. Rec.Recovery. RPD Relative Percent Difference. SDG Sample Delivery Group. (S) Surrogate (Surrogate Standard) - Analytes added to every blank, sample, Laboratory Control Sample/Duplicate and Matrix Spike/Duplicate; used to evaluate analytical efficiency by measuring recovery. Surrogates are not expected to be detected in all environmental media. U Not detected at the Reporting Limit (or MDL where applicable). Analyte The name of the particular compound or analysis performed. Some Analyses and Methods will have multiple analytes reported. Dilution If the sample matrix contains an interfering material, the sample preparation volume or weight values differ from the standard, or if concentrations of analytes in the sample are higher than the highest limit of concentration that the laboratory can accurately report, the sample may be diluted for analysis. If a value different than 1 is used in this field, the result reported has already been corrected for this factor. Limits These are the target % recovery ranges or % difference value that the laboratory has historically determined as normal for the method and analyte being reported. Successful QC Sample analysis will target all analytes recovered or duplicated within these ranges. Original Sample The non-spiked sample in the prep batch used to determine the Relative Percent Difference (RPD) from a quality control sample. The Original Sample may not be included within the reported SDG. Qualifier This column provides a letter and/or number designation that corresponds to additional information concerning the result reported. If a Qualifier is present, a definition per Qualifier is provided within the Glossary and Definitions page and potentially a discussion of possible implications of the Qualifier in the Case Narrative if applicable. Result The actual analytical final result (corrected for any sample specific characteristics) reported for your sample. If there was no measurable result returned for a specific analyte, the result in this column may state “ND” (Not Detected) or “BDL” (Below Detectable Levels). The information in the results column should always be accompanied by either an MDL (Method Detection Limit) or RDL (Reporting Detection Limit) that defines the lowest value that the laboratory could detect or report for this analyte. Uncertainty (Radiochemistry)Confidence level of 2 sigma. Case Narrative (Cn) A brief discussion about the included sample results, including a discussion of any non-conformances to protocol observed either at sample receipt by the laboratory from the field or during the analytical process. If present, there will be a section in the Case Narrative to discuss the meaning of any data qualifiers used in the report. Quality Control Summary (Qc) This section of the report includes the results of the laboratory quality control analyses required by procedure or analytical methods to assist in evaluating the validity of the results reported for your samples. These analyses are not being performed on your samples typically, but on laboratory generated material. Sample Chain of Custody (Sc) This is the document created in the field when your samples were initially collected. This is used to verify the time and date of collection, the person collecting the samples, and the analyses that the laboratory is requested to perform. This chain of custody also documents all persons (excluding commercial shippers) that have had control or possession of the samples from the time of collection until delivery to the laboratory for analysis. Sample Results (Sr) This section of your report will provide the results of all testing performed on your samples. These results are provided by sample ID and are separated by the analyses performed on each sample. The header line of each analysis section for each sample will provide the name and method number for the analysis reported. Sample Summary (Ss)This section of the Analytical Report defines the specific analyses performed for each sample ID, including the dates and times of preparation and/or analysis. Qualifier Description The remainder of this page intentionally left blank, there are no qualifiers applied to this SDG. 1 Cp 2 Tc 3 Ss 4 Cn 5 Sr 6 Qc 7 Gl 8 Al 9 Sc ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE: Stantec - 7-11 (Direct)203724138 L1792023 11/05/24 11:53 21 of 24 ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE: Stantec - 7-11 (Direct)203724138 L1792023 11/05/24 12:32 21 of 24 Pace Analytical National 12065 Lebanon Rd Mount Juliet, TN 37122 Alabama 40660 Nebraska NE-OS-15-05 Alaska 17-026 Nevada TN000032021-1 Arizona AZ0612 New Hampshire 2975 Arkansas 88-0469 New Jersey–NELAP TN002 California 2932 New Mexico ¹TN00003 Colorado TN00003 New York 11742 Connecticut PH-0197 North Carolina Env375 Florida E87487 North Carolina ¹DW21704 Georgia NELAP North Carolina ³41 Georgia ¹923 North Dakota R-140 Idaho TN00003 Ohio–VAP CL0069 Illinois 200008 Oklahoma 9915 Indiana C-TN-01 Oregon TN200002 Iowa 364 Pennsylvania 68-02979 Kansas E-10277 Rhode Island LAO00356 Kentucky ¹ ⁶KY90010 South Carolina 84004002 Kentucky ²16 South Dakota n/a Louisiana AI30792 Tennessee ¹ ⁴2006 Louisiana LA018 Texas T104704245-20-18 Maine TN00003 Texas ⁵LAB0152 Maryland 324 Utah TN000032021-11 Massachusetts M-TN003 Vermont VT2006 Michigan 9958 Virginia 110033 Minnesota 047-999-395 Washington C847 Mississippi TN00003 West Virginia 233 Missouri 340 Wisconsin 998093910 Montana CERT0086 Wyoming A2LA A2LA – ISO 17025 1461.01 AIHA-LAP,LLC EMLAP 100789 A2LA – ISO 17025 ⁵1461.02 DOD 1461.01 Canada 1461.01 USDA P330-15-00234 EPA–Crypto TN00003 ACCREDITATIONS & LOCATIONS ¹ Drinking Water ² Underground Storage Tanks ³ Aquatic Toxicity ⁴ Chemical/Microbiological ⁵ Mold ⁶ Wastewater n/a Accreditation not applicable * Not all certifications held by the laboratory are applicable to the results reported in the attached report. * Accreditation is only applicable to the test methods specified on each scope of accreditation held by Pace Analytical. 1 Cp 2 Tc 3 Ss 4 Cn 5 Sr 6 Qc 7 Gl 8 Al 9 Sc ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE: Stantec - 7-11 (Direct)203724138 L1792023 11/05/24 11:53 22 of 24 ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE: Stantec - 7-11 (Direct)203724138 L1792023 11/05/24 12:32 22 of 24 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 Stantec Consulting Inc. Attn: Anna Skinner 2890 East Cottonwood Parkway, Suite 300 Salt Lake City, UT 84121 Work Order: 24J1978 Project: 203724139 11/5/2024 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 6 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 Stantec Consulting Inc. Anna Skinner 2890 East Cottonwood Parkway, Suite 300 Salt Lake City, UT 84121 PO#: Receipt: Date Reported: Project Name: 203724139 10/23/24 10:56 @ 20.2 °C 11/5/2024 203724139 Sample ID: USC - 1 Lab ID: 24J1978-01Matrix: Solid Flag(s)Units Analysis Date/Time Date Sampled: 10/22/24 11:30 Preparation Date/Time Sampled By: Steve Yorgason Minimum Reporting Limit MethodResult Inorganic -10/31/2410/31/24ASTM D2487-ModSWUnited Soil Classification [USC] Project Name: 203724139 CtF WO#: 24J1978 www.ChemtechFord.com Page 2 of 6Page 2 of 6 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 Stantec Consulting Inc. Anna Skinner 2890 East Cottonwood Parkway, Suite 300 Salt Lake City, UT 84121 PO#: Receipt: Date Reported: Project Name: 203724139 10/23/24 10:56 @ 20.2 °C 11/5/2024 203724139 Sample ID: USC - 2 Lab ID: 24J1978-02Matrix: Solid Flag(s)Units Analysis Date/Time Date Sampled: 10/22/24 16:00 Preparation Date/Time Sampled By: Steve Yorgason Minimum Reporting Limit MethodResult Inorganic -10/31/2410/31/24ASTM D2487-ModSWUnited Soil Classification [USC] Project Name: 203724139 CtF WO#: 24J1978 www.ChemtechFord.com Page 3 of 6Page 3 of 6 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 Stantec Consulting Inc. Anna Skinner 2890 East Cottonwood Parkway, Suite 300 Salt Lake City, UT 84121 PO#: Receipt: Date Reported: Project Name: 203724139 10/23/24 10:56 @ 20.2 °C 11/5/2024 203724139 Sample ID: USC - 3 Lab ID: 24J1978-03Matrix: Solid Flag(s)Units Analysis Date/Time Date Sampled: 10/22/24 15:34 Preparation Date/Time Sampled By: Steve Yorgason Minimum Reporting Limit MethodResult Inorganic -10/31/2410/31/24ASTM D2487-ModSWUnited Soil Classification [USC] Project Name: 203724139 CtF WO#: 24J1978 www.ChemtechFord.com Page 4 of 6Page 4 of 6 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 Stantec Consulting Inc. Anna Skinner 2890 East Cottonwood Parkway, Suite 300 Salt Lake City, UT 84121 PO#: Receipt: Date Reported: Project Name: 203724139 10/23/24 10:56 @ 20.2 °C 11/5/2024 203724139 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: 203724139 CtF WO#: 24J1978 www.ChemtechFord.com Page 5 of 6Page 5 of 6 Page 6 of 6