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HomeMy WebLinkAboutDERR-2024-010077 20201466.004A/SLC21R127561_R1 Page i of iii July 1, 2021 © 2021 Kleinfelder www.kleinfelder.com 849 West Levoy, Suite 200, Salt Lake City, UT. 84123 p | 801.261.3336 FINAL FOR AGENCY RECORD POST-REMOVAL SAMPLING REPORT LARK MONOFILL SUBSTATION PARCEL VICINITY 7020 WEST AND 11800 SOUTH SOUTH JORDAN, UTAH KLEINFELDER PROJECT NO.: 20201466.004A JULY 1, 2021 Copyright 2021 Kleinfelder All Rights Reserved ONLY THE CLIENT OR ITS DESIGNATED REPRESENTATIVES MAY USE THIS DOCUMENT AND ONLY FOR THE SPECIFIC PROJECT FOR WHICH THIS REPORT WAS PREPARED 20201466.004A/SLC21R127561_R1 Page ii of iii July 1, 2021 © 2021 Kleinfelder www.kleinfelder.com A Report Prepared for: Mr. Doug Young Executive Director SOJO118, LLC 6150 South Redwood Road Suite 150 Taylorsville UT 84123 FINAL FOR AGENCY RECORD POST-REMOVAL SAMPLING REPORT LARK MONOFILL SUBSTATION PARCEL VICINITY 7020 WEST AND 11800 SOUTH SOUTH JORDAN, UTAH Prepared by: ________________________________ Dylan Pike Staff Professional II ________________________________ Corinne Hillard, PG Senior Project Manager KLEINFELDER 849 West Levoy Dr., Suite 200 Salt Lake City, Utah 84123 Phone: 801.261.3336 July 1, 2021 Kleinfelder Project No.: 20201466.004A 20201466.004A/SLC21R127561_R1 Page iii of iii July 1, 2021 © 2021 Kleinfelder www.kleinfelder.com TABLE OF CONTENTS ____________________________________________________________________________ SECTION PAGE INTRODUCTION ............................................................................................................. 1 BACKGROUND ................................................................................................... 1 SITE DESCRIPTION ........................................................................................... 1 CONSTITUENTS OF CONCERN ........................................................................ 1 KENNECOTT SOUTH ZONE ACTION LEVELS .................................................. 2 METHODOLOGY ............................................................................................................ 3 REMOVAL ACTIVITIES ....................................................................................... 3 POST-REMOVAL SAMPLE COLLECTION .......................................................... 4 ANALYTICAL RESULTS ................................................................................................ 5 DATA QUALITY OBJECTIVES AND QA/QC ................................................................. 6 CONCLUSIONS .............................................................................................................. 7 LIMITATIONS ................................................................................................................. 8 FIGURES 1 Site Vicinity Map 2 Substation Location and Site Characterization Results 3 Post-Removal Sample Locations TABLES 1 Soil Analytical Results APPENDICES A Standard Operating Procedures B Photographs and Truck Logs C Laboratory Analytical Reports and Chain of Custody Documentation 20201466.004A/SLC21R127561_R1 Page 1 of 8 July 1, 2021 © 2021 Kleinfelder www.kleinfelder.com INTRODUCTION BACKGROUND Kleinfelder has prepared this report to document the removal of metals-impacted soil from a portion of the South Valley Water Reclamation property, (the Lark Monofill), which is located northeast of the intersection of Highway 111 (Bacchus Highway) and 11800 South in South Jordan, Utah (see Figure 1). Shallow soil in portions of the Lark Monofill have been impacted with elevated metals via surface water drainages that originated in the mining areas to the west. Metals-impacted soils were identified along the Lark Monofill east fence line, adjacent to the Bastian Ditch Drainage area located on Daybreak property, and within the Bastian Ditch channel that runs north-south through the center of the Lark Monofill. Kleinfelder began the soil removal action in May 2021 in the southeast corner of the Lark Monofill. The removal activities were conducted in accordance with the Lark Monofill Bastian Ditch Remedial Action Work Plan (Kleinfelder Document No. SLC20R107223_R3 dated April 26, 2021). SITE DESCRIPTION Rocky Mountain Power (RMP) intends to construct a substation on an approximate 4-acre parcel in the southeast corner of the Lark Monofill, referred herein as the “Site”. The Site boundaries are indicated on Figure 2. Due to the pending property transfer and substation construction, RMP has requested the soil removal activities conducted on that parcel be documented and submitted for regulatory closure prior to completion of the entire Lark Monofill corrective action. This report documents the soil removal activities, confirmation sampling procedures, and laboratory analytical results for the RMP parcel. CONSTITUENTS OF CONCERN The contaminants of concern (COCs) for the Site are lead and arsenic in soil, where the Bastian Ditch Drainage has impacted the Site near surface soils. 20201466.004A/SLC21R127561_R1 Page 2 of 8 July 1, 2021 © 2021 Kleinfelder www.kleinfelder.com KENNECOTT SOUTH ZONE ACTION LEVELS A 2015 joint Technical Memorandum prepared by the Utah Division of Environmental Response and Remediation (DERR) and U.S. Environmental Protection Agency (EPA) Region 8 (the Agencies) established soil action levels for the Kennecott North and South Zone Operable Units, including the following standards for the Bastian Ditch (OU5): • Agricultural Land Use Standards – 8,500 mg/kg lead and 100 mg/kg arsenic, • Industrial Land Use Standards – 4,414 mg/kg lead and 261 mg/kg arsenic, • Recreational Land Use Standards - 2,207 mg/kg lead and 283 mg/kg arsenic, • Unrestricted Land Use Standards - 500 mg/kg lead and 50 mg/kg arsenic. Due to the undeveloped nature of the area at the time the standards were established, commercial and residential land use standards were not established for most of the Kennecott Operable Units. SVWR requested the assignment of the same Commercial Land Use Standards for the Lark property that have been established for the other nearby Bastian Ditch-impacted areas. The DERR concurred with the use of the Daybreak Commercial Land Use Standards for the Lark removal action in their comments to the draft Lark Remedial Action Work Plan dated April 8, 2021. Those standards are: • Commercial Land Use Standards – 2,000 mg/kg lead and 450 mg/kg arsenic To allow for maximum flexibility in Site development, SOJO118, LLC intends to perform any necessary corrective action in compliance with the Unrestricted Land Use Standards. 20201466.004A/SLC21R127561_R1 Page 3 of 8 July 1, 2021 © 2021 Kleinfelder www.kleinfelder.com METHODOLOGY On May 17 through 25, 2021 Kleinfelder directed Richins Excavating to remove soil contaminated with lead and arsenic at concentrations exceeding the Unrestricted Land Use Standards from the Site. Excavation and sampling activities were conducted according to the project workplan and following the standard operating procedures included in Appendix A. The remedial excavation and soil sampling methodologies are described below. REMOVAL ACTIVITIES Richins Excavating, under Kleinfelder’s direction, used an excavator to remove surficial soils impacted with lead and arsenic at concentrations exceeding the Unrestricted Land Use Standards. Tasks related to the removal action are described below. • Blue Stakes of Utah was notified prior to the removal operations to identify and mark the location of buried utilities. • Richins Excavating secured a land disturbance permit from the City of South Jordan. • Richins Excavating prepared a construction stormwater pollution protection plan (SWPPP). • Water trucks were used to control dust during loading and on the dirt haul roads. • A track hoe was used to excavate the soil. It was fitted with a flat blade to limit mixing with the underlying soil during excavation. The soil was hauled to a commercially platted parcel in the southwest corner of the Lark Monofill. • Post-removal confirmation soil samples were collected in accordance with the work plan. The soil was removed in approximately six-inch intervals to allow Kleinfelder to screen the in-situ soil with an x-ray fluorescence (XRF) detector. Readings were taken continuously from the post- removal surfaces, including both the floor and sidewalls of the excavation. XRF readings indicating the metals concentrations were likely to exceed the applicable cleanup action level (i.e., concentrations of at least 70% of the Unrestricted Land Use Standards—350 mg/kg lead 20201466.004A/SLC21R127561_R1 Page 4 of 8 July 1, 2021 © 2021 Kleinfelder www.kleinfelder.com and 35 mg/kg arsenic), were removed as “impacted”. Based on the prior Site characterization and the XRF screening during removal, the excavated soils contained lead and arsenic at concentrations below the Commercial Land Use Standards and were hauled to a commercially platted parcel in the southwest corner of the Lark Monofill, in accordance with the DERR-approved work plan. Approximately 4,050 yards of soil were removed from the RMP parcel. A log of the haul trucks is provided in Appendix B. In general, the excavation extended 2.5 to 3 feet below ground surface and from the east property line to approximately 15 to 30 feet west of the property line. The approximate boundary of the excavated area is shown on Figure 2. POST-REMOVAL SAMPLE COLLECTION On May 25, 2021, following soil screening and excavation of impacted soils, Kleinfelder collected four multi-point composite soil samples to document the lead and arsenic concentrations remaining in Site soils. Two post-removal soil samples were collected from the floor of the excavation and were given an “FG” prefix. Two samples were collected from the sidewalls of the excavation and were given an “FS” prefix. The sample locations were surveyed using a hand-held global positioning system (GPS) unit capable of sub-meter accuracy. Photographs taken of the sample locations are provided in Appendix B. The samples were collected in accordance with the project work plan. In general, the composite post-removal ground surface samples were collected with aliquots spaced at 40-foot linear intervals, and 10 to 15 feet laterally, representing approximately 200 linear feet of the excavation. Post-removal excavation sidewall samples were collected with aliquots spaced at 40-foot intervals representing 200 linear feet. The sidewall samples were collected as a 6-inch vertical sample from the soil interval that demonstrated the highest metals concentrations prior to removal. The sample numbers, description, location, and aliquots are provided in Table 1. The sample locations are shown on Figure 3, Post-Removal Sample Locations. Kleinfelder personnel used a clean stainless-steel trowel to collect each aliquot of soil for each composite sample. The sampling equipment was decontaminated with non-phosphate detergent solution wash and distilled water rinse between each composite sample. Each soil sample was submitted under chain of custody documentation to Pace Analytical National Center for Testing and Innovation (Pace) in Mount Juliet, Tennessee for analysis of lead and arsenic by EPA methods SW846-3050B (sample preparation) and SW846-6010B (sample analysis). 20201466.004A/SLC21R127561_R1 Page 5 of 8 July 1, 2021 © 2021 Kleinfelder www.kleinfelder.com ANALYTICAL RESULTS The laboratory reported concentrations of lead ranging from 84.7 mg/kg in sample FS-2 to 174 mg/kg in sample FS-1. Reported concentrations of arsenic ranged from 11.6 mg/kg in sample FS-2 to 15.9 mg/kg in sample FS-1. The analytical results were compared to the Unrestricted Land Use Standards for lead and arsenic of 500 mg/kg and 50 mg/kg, respectively. No samples collected during this remedial action exceed the Unrestricted Land Use Standards for lead or arsenic. The laboratory analytical results for this assessment are summarized in Table 1. Copies of the laboratory analytical reports and chain of custody documentation are included in Appendix C. 20201466.004A/SLC21R127561_R1 Page 6 of 8 July 1, 2021 © 2021 Kleinfelder www.kleinfelder.com DATA QUALITY OBJECTIVES AND QA/QC Quality Assurance (QA) and quality control (QC) samples were proposed to be collected at a rate of 10 percent of the total samples. Kleinfelder’s remedial action is ongoing, and because only four samples were collected in the substation area, no QA/QC samples were collected or submitted for laboratory analysis. As the larger remedial action at the Lark Monofill continues, Kleinfelder will collect and analyze QA/QC samples according to the workplan. 20201466.004A/SLC21R127561_R1 Page 7 of 8 July 1, 2021 © 2021 Kleinfelder www.kleinfelder.com CONCLUSIONS Following the remedial action at the Site, Kleinfelder collected composite soil samples to document the concentrations of lead and arsenic remaining in Site soils. Four composite soil samples were collected and submitted to Pace for laboratory analysis of lead and arsenic. Based on the laboratory analytical results, the four post-removal soil samples did not contain lead or arsenic at concentrations exceeding the Unrestricted Land Use Standards. These results demonstrate the impacted soil has been removed from the RMP parcel in compliance with the project work plan. On behalf of SWWR and Rocky Mountain Power, Kleinfelder requests a no further action/remedial closure finding from the Agencies for the RMP parcel soils. 20201466.004A/SLC21R127561_R1 Page 8 of 8 July 1, 2021 © 2021 Kleinfelder www.kleinfelder.com LIMITATIONS This work was performed in a manner consistent with that level of care and skill ordinarily exercised by other members of Kleinfelder’s profession practicing in the same locality, under similar conditions and at the date the services are provided. Our conclusions, opinions and recommendations are based on a limited number of observations and data. It is possible that conditions could vary between or beyond the data evaluated. Kleinfelder makes no other representation, guarantee or warranty, express or implied, regarding the services, communication (oral or written), report, opinion, or instrument of service provided. Kleinfelder offers various levels of investigative and engineering services to suit the varying needs of different clients. It should be recognized that definition and evaluation of geologic and environmental conditions are a difficult and inexact science. Judgments leading to conclusions and recommendations are generally made with incomplete knowledge of the subsurface conditions present due to the limitations of data from field studies. Although risk can never be eliminated, more detailed and extensive studies yield more information, which may help understand and manage the level of risk. Since detailed study and analysis involves greater expense, our clients participate in determining levels of service that provide adequate information for their purposes at acceptable levels of risk. More extensive studies, including subsurface studies or field tests, should be performed to reduce uncertainties. This report may be used only by the client and only for the purposes stated within a reasonable time from its issuance. land use, site conditions (both on- and off-site), or other factors may change over time, and additional work may be required. Non-compliance with any of these requirements by the client or anyone else, unless specifically agreed to in advance by Kleinfelder in writing will release Kleinfelder from any liability resulting from the use of this report by any unauthorized party. Fi g u r e s TransJordan Landfill 11800 SOUTH BACCH U S H I G H W A Y ¬«111 SITE VICINITY MAP APPROXIMATELY 180 ACRES SOUTH VALLEY WATER RECLAMATION FACILITY NORTHEAST CORNER OF HIGHWAY 111 AND 11800 SOUTH SOUTH JORDAN, UTAH PROJECT NO.: FILE NAME: FIGURE 1DRAWN: CHECKED BY: The information included on this graphic representation has been compiled from a variety of sources and is subject to change without notice. Kleinfelder makes no representations or warranties, express or implied, as to accuracy, completeness, timeliness, or rights to the use of such information. This document is not intended for use as a land survey product nor is it designed or intended as a construction design document. The use or misuse of the information contained on this graphic representation is at the sole risk of the party using or misusing the information. DRAWN BY: 0 1,000 2,000 Feet Explanation Approximate Site Boundary Basemap: USA Topo Maps map service via ESRI Inset: National Geographic World Map map service via ESRI Locations are Approximate£ Excav_Fig1.mxd ProjectLocation SA L T L A K E C I T Y , U T L: \ 2 0 2 0 \ 2 0 2 0 1 4 6 6 . 0 0 1 A - L a r k M o n o f i l l \ 2 . 0 T e c h n i c a l I n f o r m a t i o n \ 2 . 8 G I S PL O T T E D : 6 / 3 / 2 0 2 1 , K H a g a n 20201466 JUN 2021 CH KFH !( !( !( !( !( !( !( !(!( !( !( !( !( !( !( !( !( !( !( !( !( !( !( !( !( !( !( !( !( !( !( !( !( !( !( !( !( !( !( !( !( !( !( !( !( !( !( !( !( !( !( !( !( !( !( !( !( !( !( !( !( !( !(!(!( !(!(!( !( !( !( !( !(!(!(!(!(!( !( !( !( !( !( !( !( !( !( !( !( !( !( !( !( !( !( !( !( !( !( !( !( !( !( !( !( !( !( !( !( !( !( !( !( !( !( !( !( !( !( !( !( !( !( BA C C H U S H I G H W A Y UV111 11800 SOUTH KE-80 KE-79 KE-78 KE-77 KE-76 KE-75 KE-74 KE-73 KE-72 KE-71 KE-70 KE-69 KE-68 KE-67 KE-65 KE-64 KE-63 KE-62 KE-61 KE-60 KE-59 KE-58 KE-57 KE-56 KE-55 KE-54 KE-53 KE-52 KE-51 KE-50 KE-49 KE-48 KE-46 KE-45 KE-44 KE-42 KE-41 KE-40 KE-86 KE 85 KE-84KE-83KE-82KE-81 KE-38 KE-39 KE-47 KE-66 KE-43 KE-59BD KE-57BD KE-54BD KE-48BD KE-51BD KS-7 KS-2 KS-6KS-4 KS-1 KS-5KS-3 KP-9 KP-8 KP-6 KP-5 KP-4 KP-7 KP-1 KP-24 KP-23 KP-22 KP-19 KP-12 KP-21 KP-42 KP-41 KP-18 KP-20 KP-10 KP-11 KP-2C KP-3C KP-13 KP-25 KP-14 KP-15 KP-49 KP-50 KP-48 KP-45 KP-46 KP-47 KP-44 KP-43 KP-27 KP-29 KP-30 KP-31 KP-32 KP-33 KP-34 KP-35 KP-36 KP-37 KP-38 KP-39 KP-40 KP-28 KP-16 KP-26 KP-17 KT-7 KT-11 KT-1 KT-4 KT-5 KT-8 KT-6 KT-9 KT-13 KT-14 KT-12 KT-10 SUBSTATION LOCATION ANDSITE CHARACTERIZATION RESULTS SOUTH VALLEY WATER RECLAMATION FACILITY NORTHEAST CORNER OF HIGHWAY 111 AND 11800 SOUTH SOUTH JORDAN, UTAH FIGURE2 Excav_Fig2.mxd FILE NAME: The information included on this graphic representation has been compiled from a variety of sources and is subject to change without notice. Kleinfelder makes no representations or warranties, express or implied, as to accuracy, completeness, timeliness, or rights to the use of such information. This document is not intended for use as a land survey product nor is it designed or intended as a construction design document. The use or misuse of the information contained on this graphic representation is at the sole risk of the party using or misusing the information. CHCHECKED BY: KFHDRAWN BY: JUN 2021DRAWN: 20201466PROJECT NO: 0 200 400Feet£Locations are Approximate www.kleinfelder.com SA L T L A K E C I T Y , U T L: \ 2 0 2 0 \ 2 0 2 0 1 4 6 6 . 0 0 1 A - L a r k M o n o f i l l \ 2 . 0 T e c h n i c a l I n f o r m a t i o n \ 2 . 8 G I S PL O T T E D : 6 / 2 9 / 2 0 2 1 , K H a g a n Aerial imagery: ESRI World Imagery, Metro Maxar 6/1/2020. Explanation !(Lead and Arsenic < Unrestricted Land Use !(Lead and Arsenic > Unrestricted Land Use Standards but < Commercial Land Use Standards !(Lead and Arsenic > Commercial Land Use Main Bastian Ditch Side Drainages Visible on Historical Aerial Bastian Ditch Drainage Sediments with Elevated Metals Left Outside Lark Fenceline During Bastian Ditch Drainage Excavation by Rio Tinto Proposed Substation Commercial Development Bastian Ditch Drainage KUC Excavation Approximate Site !( !( !(!( !( !(!( !( !(!( !( !(!( !( !(!( !( !(!( !( !(!( !( !(!( !( !(!( !( !(!( !( FS-2 FS-1 FG-1 FG-2 POST-REMOVAL SAMPLES SOUTH VALLEY WATER RECLAMATION FACILITY NORTHEAST CORNER OF HIGHWAY 111 AND 11800 SOUTH SOUTH JORDAN, UTAH PROJECT NO.: FILE NAME: FIGURE 3DRAWN: CHECKED BY: The information included on this graphic representation has been compiled from a variety of sources and is subject to change without notice. Kleinfelder makes no representations or warranties, express or implied, as to accuracy, completeness, timeliness, or rights to the use of such information. This document is not intended for use as a land survey product nor is it designed or intended as a construction design document. The use or misuse of the information contained on this graphic representation is at the sole risk of the party using or misusing the information. DRAWN BY: 0 40 80 Feet Explanation !(Post-Removal Excavation Floor Samples !(Post-Removal Excavation Sidewall Samples Bastian Ditch Drainage Sediments with Elevated Metals Left Outside Lark Fenceline During Bastian Ditch Drainage Excavation by Rio Tinto Proposed Substation Parcel Excavation Area, June 2021 Bastian Ditch Drainage KUC Excavation Area Approximate Site Boundary Aerial: ESRI World Imagery, Salt Lake County 10/15/2019. Locations are Approximate£ Excav_Fig3.mxdSA L T L A K E C I T Y , U T L: \ 2 0 2 0 \ 2 0 2 0 1 4 6 6 . 0 0 1 A - L a r k M o n o f i l l \ 2 . 0 T e c h n i c a l I n f o r m a t i o n \ 2 . 8 G I S PL O T T E D : 6 / 2 9 / 2 0 2 1 , K H a g a n 20201466 JUN 2021 CH KFH Ta b l e s FG-1 05/21/21 Collected from the post-removal ground surface. 0-3 below post-removal surface 11-point composite sample with subsamples spaced 40 ft apart 12.0 105 FG-2 05/21/21 Collected from the post-removal ground surface. 0-3 below post-removal surface 10-point composite sample with subsamples spaced 40 ft apart 11.7 95.2 FS-1 05/21/21 Collected from the west sidewall of the removal excavation at the interval with the highest impacts prior to soil removal. 24-30 bgs 5-point composite sample with subsamples spaced 40 ft apart 15.9 174 FS-2 05/21/21 Collected from the west sidewall of the removal excavation at the interval with the highest impacts prior to soil removal. 24-30 bgs 6-point composite sample with subsamples spaced 40 ft apart 11.6 84.7 50 500 Notes and Abbreviations: bold = sample result exceeds the Unrestricted Land Use Standards mg/kg = milligrams per kilogram bgs = below ground surface (1) FG = post removal ground surface sample, FS = Post-removal excavation sidewall sample Unrestricted Land-Use Standards: Sample Type/Purpose TABLE 1 Post-Removal Soil Analytical Results SE Corner of Lark Monofill Sample ID(1)Date Collected Arsenic (mg/kg) Lead (mg/kg) Substation Parcel Sample Depth (inches bgs)Sample Arrangement 20201466.004A/SLC21R127561 © 2021 Kleinfelder Table 1 Page 1 of 1 July 1, 2021 At t a c h m e n t A 20201466.004A/SLC21R127561_R1 July 1, 2021 © 2021 Kleinfelder www.kleinfelder.com APPENDIX A STANDARD OPERATING PROCEDURES 20201466.004A/SLC21R127561_R1 Page A-1 of A-3 July 1, 2021 © 2021 Kleinfelder www.kleinfelder.com EQUIPMENT DECONTAMINATION Decontamination procedures will be used to prevent cross-contamination of samples. Decontamination procedures will be established for each site based on the contaminants of concern to be sampled and the degree of hazard associated with the site. Decontamination procedures will be reviewed and approved by the Site Health and Safety Manager. The following procedure contains standard decontamination protocols, suitable for most sites. All non-disposable sampling equipment will be decontaminated prior to use and between samples as follows: • Remove Gross Contaminants – Equipment will be scrubbed using a water/detergent solution and stiff brush until visible contaminants are removed. The water will be changed as necessary, daily at a minimum. • Wash with Alconox soap or similar detergent – An Alconox wash will be prepared as indicated on the product labeling, typically mixing 1 to 1.5 tablespoons of Alconox per gallon of water. The water will be changed as necessary, daily at a minimum. • Water Rinse – Equipment will be rinsed with clear potable water. The water will be changed as necessary, daily at a minimum. • Deionized Water Rinse – Deionized water will be used as a final rinse for all equipment. The water may be poured or sprayed, or the equipment submerged. • Gloves – Sampling personnel will change into a new pair of chemical-resistant gloves between samples and discard the previous pair. The backhoe bucket will be decontaminated prior to use using a high-pressure washer. Decontamination water will be dispersed on the ground surface and allowed to infiltrate near the source. Between trench/sample locations, the backhoe bucket will be shaken and/or swept to remove loose dirt. SAMPLE COLLECTION Sample containers, preservation techniques and holding times will be consistent with EPA SW-846 guidelines. Soil samples to be analyzed for metals will be placed in plastic Ziplock bags. No preservation or sample cooling is necessary for lead and arsenic analysis and the holding time is 6 months. Sample intervals will be selected based on the project sampling plan. Soil samples will be collected using disposable plastic or decontaminated hand tools. These tools may include one or more of the following: • Disposable plastic spoon, trowel or cup • Stainless steel spoon, trowel or cup • Clean, disposable gloves (vinyl, latex, nitrile) Only disposable plastic or decontaminated stainless-steel tools will be used to sample the material. Reusable sampling tools will be decontaminated prior to use following the procedures described in the “Equipment Decontamination” SOP. 20201466.004A/SLC21R127561_R1 Page A-2 of A-3 July 1, 2021 © 2021 Kleinfelder www.kleinfelder.com Grab Samples A soil sample will be collected at the selected depths with a spoon, trowel, or chemical-resistant gloves. The material will be screened with the appropriate direct reading instrument, such as a PID or XRF, and the reading will be recorded on the log form or in the field notebook. The portion of the sample collected for chemical analysis will be transferred immediately into the appropriate sample container using decontaminated equipment, clean disposable spoons or equipment, or by hand wearing new disposable chemical-resistant gloves. Avoid gravels and rock fragments when filling soil sample containers. If the sample is to be analyzed for volatile organics, the container will be completely filled with soil to minimize headspace. The container will be labeled appropriately and immediately stored in an iced cooler to maintain a temperature of 4° Celsius (if cooling is required for the analytical method). Composite Soil Samples Composite samples will be prepared by placing equal amounts of soil in a stainless steel bowl or clean plastic bag using a stainless steel spoon or by hand wearing new chemical-resistant gloves. The composite sample will be comprised of a minimum of five aliquots. The sample will be homogenized with a stainless steel spoon or gloved hand. The homogenized soil will be packaged in a laboratory-supplied sample container, labeled appropriately, and placed in an iced cooler to maintain a temperature of 4° Celsius, if appropriate for the analytical method. A sufficient quantity of soil will be collected for each sample to allow for additional laboratory analysis of lead and arsenic if requested. The samples will be held at the laboratory for 60 days after analysis to accommodate possible additional analysis. Soil sample material will be homogenized prior to analysis. The sample will be placed in a new, re-sealable plastic bag. Large debris and rocks will be removed, and the sample will be homogenized by kneading the soil within the bag. Clay soils, if encountered, will be thoroughly mixed to the extent practicable. Sample Identification and Labeling To prevent misidentification of samples each sample container will be labeled with indelible ink. The following information will be recorded on the sample container: • Project name or number • Sample identification number • Sample depth • Date and time of collection Samples will be transported in laboratory-supplied coolers and stored on ice to maintain a temperature between 2 and 6 degree Centigrade, if sample cooling is required for the analytical method. DOCUMENTATION AND SAMPLE HANDLING Field Records Field activities will be recorded on a Daily Field Report (DFR) form or in a field log book by on-site personnel during all sampling activities. All notes/comments and data generated during the project will be recorded on the DFR or log book. The general information recorded for each day’s sampling event includes: 20201466.004A/SLC21R127561_R1 Page A-3 of A-3 July 1, 2021 © 2021 Kleinfelder www.kleinfelder.com • Date • Name of overall sampling event and project number • Sampling personnel • Climatic conditions • Field equipment and subcontractor personnel • Daily operations and observations • Any deviation from the sampling protocol will be formally noted along with the names of visiting personnel and any unusual circumstances pertinent to the sampling effort. Sample Control Log For each sample collected, the following will be recorded in a sample control log or DFR: • Sample identification number • Location with measurements • Sample time • Sample type (grab, composite, etc.) • Field observations Map or diagram Boring and Trench Logs Subsurface conditions encountered will be described in the boring or trench log using the unified soil classification system. The logs will include the following, as applicable: • GPS Coordinate • Color/discoloration • Sample location/depth • Drawing of the trench dimensions and observations • Any other observations pertinent to the sampling effort Photographs Photographs may be taken of the trenches and other investigation features as deemed appropriate to document the field activities. A photograph log will be maintained on the DFR. The log will contain the following information: • Photograph identification number • Identification of site • Date of photograph Chain of Custody Sample chain of custody will be maintained for all samples collected. A chain of custody record will be filled out and will accompany every set of samples in order to establish the documentation necessary to trace sample possession from the time of collection. Samples will remain in the possession of the sampler at all times, or in a locked facility until delivery to the analytical laboratory. Ap p e n d i x B 20201466.004A/SLC21R127561_R1 July 1, 2021 © 2021 Kleinfelder www.kleinfelder.com APPENDIX B PHOTOGRAPHS AND TRUCK LOGS Sample Information Sheet by  Ted Wallace Lark Monofill Environmental Consulting 20201466.001A Hillard, Corinne Sample Information Sample ID:FG-1 Date/Time:June 16, 2021 10:01 AM Location:East northeast fence line Coordinates:40.537068, -112.057899 Represents: Configuration:11 -point composite sample with subsamples spaced 10 feet apart Sample Purpose:Floor Confirmation Sampling. Notes: Photos North facing photo at FG-1 excavation ground surface.South facing photo of FG-1 excavation ground surface. /FieldNet/Service_Lines/Contaminated_Lands/Env_trench_remediation_qc/even t_id_12 Page 4 of 8 Pages7/1/2021 5:53:05 PM 40 x 10 feet. In-situ material from 0-3 inches below post-removal ground surface. Excavation depth ~2.5 ft. May 21, 2021 Sample Information Sheet by  Ted Wallace Lark Monofill Environmental Consulting 20201466.001A Hillard, Corinne Sample Information Sample ID:FG-2 Date/Time:June 16, 2021 10:29 AM Location:East northeast fence line Coordinates:40.537751, -112.057952 Represents: Configuration:10 -point composite sample with subsamples spaced 10 feet apart Sample Purpose:Floor Confirmation Sampling. Notes: Photos North facing photo of FG-2 excavation ground surface.South facing photo of FG-2 excavation ground surface. /FieldNet/Service_Lines/Contaminated_Lands/Env_trench_remediation_qc/even t_id_12 Page 6 of 8 Pages7/1/2021 5:53:05 PM 40 x 10 feet. In-situ material from 0-3 inches below post-removal ground surface. Excavation depth ~2.5 ft. May 21, 2021 Sample Information Sheet by  Ted Wallace Lark Monofill Environmental Consulting 20201466.001A Hillard, Corinne Sample Information Sample ID:FS-1 Date/Time:June 16, 2021 10:20 AM Location:East northeast fence line Coordinates:40.537123, -112.057904 Represents: Configuration:5 -point composite sample with subsamples spaced 40 feet apart Sample Purpose:Wall Confirmation Sampling. Notes: Photos North facing photo of FS-2 excavation sidewall.South facing photo of FS-2 excavation sidewall. /FieldNet/Service_Lines/Contaminated_Lands/Env_trench_remediation_qc/even t_id_12 Page 5 of 8 Pages7/1/2021 5:53:05 PM In-situ material from 24-30 inches below ground on excavation west sidewall. Excavation depth 2.5 ft. May 21, 2021 Sample Information Sheet by  Ted Wallace Lark Monofill Environmental Consulting 20201466.001A Hillard, Corinne Sample Information Sample ID:FS-2 Date/Time:June 16, 2021 12:29 PM Location:East northeast fence line Coordinates:40.537669, -112.058003 Represents: Configuration:5 -point composite sample with subsamples spaced 40 feet apart Sample Purpose:Sidewall Confirmation Sample. Notes: Photos North facing photo of FS-2 excavated sidewall.South facing photo of FG-2 excavated sidewall. /FieldNet/Service_Lines/Contaminated_Lands/Env_trench_remediation_qc/even t_id_12 Page 7 of 8 Pages7/1/2021 5:53:05 PM In-situ material from 24-30 inches below ground on excavation west sidewall. Excavation depth 2.5 ft. May 21, 2021 PERSONNEL DATE (2021)TIME TRUCK # (1) or description WEIGHT (2) in Tons (estimate) ORIGIN (3) (Fence Line or Bastian Ditch) DESTINATION (4) (Trans-Jordan or Commercial Plat) TW and KN 05/17/21 10:40 40 FL CP TW and KN 05/17/21 11:09 40 FL CP TW and KN 05/17/21 11:39 40 FL CP TW and KN 05/17/21 13:05 40 FL CP TW and KN 05/17/21 13:27 40 FL CP TW and KN 05/17/21 14:13 40 FL CP TW and KN 05/17/21 14:31 40 FL CP TW and KN 05/17/21 15:43 40 FL CP TW and KN 05/17/21 15:56 40 FL CP TW and KN 05/17/21 16:20 40 FL CP TW and KN 05/17/21 16:39 40 FL CP TW and KN 05/18/21 40 FL CP TW and KN 05/18/21 40 FL CP TW and KN 05/18/21 40 FL CP TW and KN 05/18/21 40 FL CP TW and KN 05/18/21 40 FL CP TW and KN 05/18/21 40 FL CP TW and KN 05/18/21 40 FL CP TW and KN 05/18/21 40 FL CP TW and KN 05/18/21 40 FL CP TW and KN 05/18/21 40 FL CP TW and KN 05/18/21 40 FL CP TW and KN 05/19/21 40 FL CP TW and KN 05/19/21 40 FL CP TW and KN 05/19/21 40 FL CP TW and KN 05/19/21 40 FL CP TW and KN 05/19/21 40 FL CP TW and KN 05/19/21 40 FL CP TW and KN 05/19/21 40 FL CP TW and KN 05/19/21 40 FL CP TW and KN 05/19/21 40 FL CP TW and KN 05/19/21 40 FL CP TW and KN 05/19/21 40 FL CP TW and KN 05/19/21 40 FL CP TW and KN 05/19/21 40 FL CP TW and KN 05/19/21 40 FL CP TW and KN 05/19/21 40 FL CP TW and KN 05/19/21 40 FL CP TW and KN 05/20/21 40 FL CP TW and KN 05/20/21 40 FL CP TW and KN 05/20/21 40 FL CP TW and KN 05/20/21 40 FL CP TW and KN 05/20/21 40 FL CP TW and KN 05/20/21 40 FL CP SOIL MANIFESTING LOG PROJECT No: 20201466 LARK MONOFILL METALS-IMPACTED SOIL REMOVAL 20201466.004A/SLC21R127561 © 2021 Kleinfelder Page B-1 of B-3 July 1, 2021 PERSONNEL DATE (2021)TIME TRUCK # (1) or description WEIGHT (2) in Tons (estimate) ORIGIN (3) (Fence Line or Bastian Ditch) DESTINATION (4) (Trans-Jordan or Commercial Plat) TW and KN 05/20/21 40 FL CP TW and KN 05/20/21 40 FL CP TW and KN 05/20/21 40 FL CP TW and KN 05/20/21 40 FL CP TW and KN 05/20/21 40 FL CP TW and KN 05/20/21 40 FL CP TW and KN 05/20/21 40 FL CP TW and KN 05/20/21 40 FL CP TW and KN 05/20/21 40 FL CP TW and KN 05/20/21 40 FL CP TW and KN 05/20/21 40 FL CP TW and KN 05/20/21 40 FL CP TW and KN 05/20/21 40 FL CP TW and KN 05/20/21 40 FL CP TW and KN 05/20/21 40 FL CP TW and KN 05/20/21 40 FL CP TW and KN 05/21/21 40 FL CP TW and KN 05/21/21 40 FL CP TW and KN 05/21/21 40 FL CP TW and KN 05/21/21 40 FL CP TW and KN 05/21/21 40 FL CP TW and KN 05/21/21 40 FL CP TW and KN 05/21/21 40 FL CP TW and KN 05/21/21 40 FL CP TW and KN 05/21/21 40 FL CP TW and KN 05/21/21 40 FL CP TW and KN 05/21/21 40 FL CP TW and KN 05/21/21 40 FL CP TW and KN 05/21/21 40 FL CP TW and KN 05/21/21 40 FL CP TW and KN 05/21/21 40 FL CP TW and KN 05/21/21 40 FL CP TW and KN 05/21/21 40 FL CP TW and KN 05/21/21 40 FL CP TW and KN 05/21/21 40 FL CP TW and KN 05/21/21 40 FL CP TW and KN 05/21/21 40 FL CP TW and KN 05/21/21 40 FL CP TW and KN 05/21/21 40 FL CP TW and KN 05/21/21 40 FL CP TW and KN 05/21/21 40 FL CP TW and KN 05/21/21 40 FL CP TW and KN 05/21/21 40 FL CP TW and KN 05/21/21 40 FL CP TW and KN 05/21/21 40 FL CP TW and KN 05/21/21 40 FL CP TW and KN 05/21/21 40 FL CP TW and KN 05/21/21 40 FL CP TW and KN 05/21/21 40 FL CP TW and KN 05/21/21 40 FL CP 20201466.004A/SLC21R127561 © 2021 Kleinfelder Page B-2 of B-3 July 1, 2021 PERSONNEL DATE (2021)TIME TRUCK # (1) or description WEIGHT (2) in Tons (estimate) ORIGIN (3) (Fence Line or Bastian Ditch) DESTINATION (4) (Trans-Jordan or Commercial Plat) TW and KN 05/21/21 40 FL CP TW 05/24/21 40 FL CP TW 05/24/21 40 FL CP TW 05/24/21 40 FL CP TW 05/24/21 40 FL CP TW 05/24/21 40 FL CP TW 05/24/21 40 FL CP TW 05/24/21 40 FL CP TW 05/24/21 40 FL CP TW 05/24/21 40 FL CP TW 05/24/21 40 FL CP TW 05/24/21 40 FL CP TW 05/24/21 40 FL CP TW 05/24/21 40 FL CP TW 05/24/21 40 FL CP TW 05/24/21 40 FL CP TW 05/24/21 40 FL CP TW 05/24/21 40 FL CP TW 05/25/21 40 FL CP TW 05/25/21 40 FL CP TW 05/25/21 40 FL CP TW 05/25/21 40 FL CP TW 05/25/21 40 FL CP TW 05/25/21 40 FL CP TW 05/25/21 40 FL CP TW 05/25/21 40 FL CP TW 05/25/21 40 FL CP TW 05/25/21 40 FL CP TW 05/25/21 40 FL CP TW 05/25/21 40 FL CP TW 05/25/21 40 FL CP TW 05/25/21 40 FL CP TW 05/25/21 40 FL CP TW 05/25/21 40 FL CP TW 05/25/21 40 FL CP TW 05/25/21 40 FL CP TW 05/25/21 40 FL CP TW 05/25/21 40 FL CP TW 05/25/21 40 FL CP TW 05/25/21 40 FL CP TW 05/25/21 40 FL CP TW 05/25/21 40 FL CP TW 05/25/21 40 FL CP TW 05/25/21 40 FL CP TW 05/25/21 40 FL CP TW 05/25/21 40 FL CP TW 05/25/21 40 FL CP TW 05/25/21 40 FL CP TW 05/25/21 40 FL CP TW 05/25/21 40 FL CP TW 05/25/21 40 FL CP 20201466.004A/SLC21R127561 © 2021 Kleinfelder Page B-3 of B-3 July 1, 2021 Ap p e n d i x C 20201466.004A/SLC21R127561_R1 July 1, 2021 © 2021 Kleinfelder www.kleinfelder.com APPENDIX C LABORATORY ANALYTICAL RESULTS AND CHAIN OF CUSTODY DOCUMENTATION ANALYTICAL REPORT June 01, 2021 GSC/Kleinfelder - SLC Sample Delivery Group:L1357191 Samples Received:05/25/2021 Project Number:20201466 Description:Lark MoonfillSoil Removal Report To:Corinne Hillard 849 W Levoy Dr, Ste 200 Salt Lake City, UT 84123 Entire Report Reviewed By: June 01, 2021 [Preliminary Report] Jason Romer 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 www.pacenational.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: GSC/Kleinfelder - SLC 20201466 L1357191 06/01/21 11:14 1 of 13 June 01, 2021 Jason Romer Project Manager ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE: GSC/Kleinfelder - SLC 20201466 L1357191 06/01/21 11:49 1 of 13 TABLE OF CONTENTS Cp: Cover Page 1 Tc: Table of Contents 2 Ss: Sample Summary 3 Cn: Case Narrative 4 Sr: Sample Results 5 FG-1 L1357191-01 5 FS-1 L1357191-02 6 FG-2 L1357191-03 7 FS-2 L1357191-04 8 Qc: Quality Control Summary 9 Total Solids by Method 2540 G-2011 9 Metals (ICP) by Method 6010B 10 Gl: Glossary of Terms 11 Al: Accreditations & Locations 12 Sc: Sample Chain of Custody 13 1 Cp 2 Tc 3 Ss 4 Cn 5 Sr 6 Qc 7 Gl 8 Al 9 Sc ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE: GSC/Kleinfelder - SLC 20201466 L1357191 06/01/21 11:14 2 of 13 ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE: GSC/Kleinfelder - SLC 20201466 L1357191 06/01/21 11:49 2 of 13 SAMPLE SUMMARY Collected by Collected date/time Received date/time FG-1 L1357191-01 Solid Kate Nicponski 05/21/21 14:25 05/25/21 08:00 Method Batch Dilution Preparation Analysis Analyst Location date/time date/time Total Solids by Method 2540 G-2011 WG1678723 1 05/28/21 13:09 05/28/21 13:31 KDW Mt. Juliet, TN Metals (ICP) by Method 6010B WG1678080 1 05/27/21 16:11 05/28/21 11:37 KMG Mt. Juliet, TN Collected by Collected date/time Received date/time FS-1 L1357191-02 Solid Kate Nicponski 05/21/21 14:40 05/25/21 08:00 Method Batch Dilution Preparation Analysis Analyst Location date/time date/time Total Solids by Method 2540 G-2011 WG1678723 1 05/28/21 13:09 05/28/21 13:31 KDW Mt. Juliet, TN Metals (ICP) by Method 6010B WG1678080 1 05/27/21 16:11 05/28/21 11:40 KMG Mt. Juliet, TN Collected by Collected date/time Received date/time FG-2 L1357191-03 Solid Kate Nicponski 05/21/21 15:00 05/25/21 08:00 Method Batch Dilution Preparation Analysis Analyst Location date/time date/time Total Solids by Method 2540 G-2011 WG1678723 1 05/28/21 13:09 05/28/21 13:31 KDW Mt. Juliet, TN Metals (ICP) by Method 6010B WG1678080 1 05/27/21 16:11 05/28/21 11:43 KMG Mt. Juliet, TN Collected by Collected date/time Received date/time FS-2 L1357191-04 Solid Kate Nicponski 05/21/21 15:25 05/25/21 08:00 Method Batch Dilution Preparation Analysis Analyst Location date/time date/time Total Solids by Method 2540 G-2011 WG1678723 1 05/28/21 13:09 05/28/21 13:31 KDW Mt. Juliet, TN Metals (ICP) by Method 6010B WG1678080 1 05/27/21 16:11 05/28/21 11:46 KMG 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: GSC/Kleinfelder - SLC 20201466 L1357191 06/01/21 11:14 3 of 13 ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE: GSC/Kleinfelder - SLC 20201466 L1357191 06/01/21 11:49 3 of 13 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] Jason Romer Project Manager 1 Cp 2 Tc 3 Ss 4 Cn 5 Sr 6 Qc 7 Gl 8 Al 9 Sc ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE: GSC/Kleinfelder - SLC 20201466 L1357191 06/01/21 11:14 4 of 13 Jason Romer Project Manager ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE: GSC/Kleinfelder - SLC 20201466 L1357191 06/01/21 11:49 4 of 13 SAMPLE RESULTS - 01 L1357191 FG-1 Collected date/time: 05/21/21 14:25 Total Solids by Method 2540 G-2011 Result Qualifier Dilution Analysis Batch Analyte %date / time Total Solids 94.9 1 05/28/2021 13:31 WG1678723 Metals (ICP) by Method 6010B Result (dry)Qualifier RDL (dry)Dilution Analysis Batch Analyte mg/kg mg/kg date / time Arsenic 12.0 2.11 1 05/28/2021 11:37 WG1678080 Lead 105 0.527 1 05/28/2021 11:37 WG1678080 1 Cp 2 Tc 3 Ss 4 Cn 5 Sr 6 Qc 7 Gl 8 Al 9 Sc ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE: GSC/Kleinfelder - SLC 20201466 L1357191 06/01/21 11:14 5 of 13 ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE: GSC/Kleinfelder - SLC 20201466 L1357191 06/01/21 11:49 5 of 13 SAMPLE RESULTS - 02 L1357191 FS-1 Collected date/time: 05/21/21 14:40 Total Solids by Method 2540 G-2011 Result Qualifier Dilution Analysis Batch Analyte %date / time Total Solids 93.2 1 05/28/2021 13:31 WG1678723 Metals (ICP) by Method 6010B Result (dry)Qualifier RDL (dry)Dilution Analysis Batch Analyte mg/kg mg/kg date / time Arsenic 15.9 2.15 1 05/28/2021 11:40 WG1678080 Lead 174 0.537 1 05/28/2021 11:40 WG1678080 1 Cp 2 Tc 3 Ss 4 Cn 5 Sr 6 Qc 7 Gl 8 Al 9 Sc ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE: GSC/Kleinfelder - SLC 20201466 L1357191 06/01/21 11:14 6 of 13 ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE: GSC/Kleinfelder - SLC 20201466 L1357191 06/01/21 11:49 6 of 13 SAMPLE RESULTS - 03 L1357191 FG-2 Collected date/time: 05/21/21 15:00 Total Solids by Method 2540 G-2011 Result Qualifier Dilution Analysis Batch Analyte %date / time Total Solids 92.7 1 05/28/2021 13:31 WG1678723 Metals (ICP) by Method 6010B Result (dry)Qualifier RDL (dry)Dilution Analysis Batch Analyte mg/kg mg/kg date / time Arsenic 11.7 2.16 1 05/28/2021 11:43 WG1678080 Lead 95.2 0.539 1 05/28/2021 11:43 WG1678080 1 Cp 2 Tc 3 Ss 4 Cn 5 Sr 6 Qc 7 Gl 8 Al 9 Sc ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE: GSC/Kleinfelder - SLC 20201466 L1357191 06/01/21 11:14 7 of 13 ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE: GSC/Kleinfelder - SLC 20201466 L1357191 06/01/21 11:49 7 of 13 SAMPLE RESULTS - 04 L1357191 FS-2 Collected date/time: 05/21/21 15:25 Total Solids by Method 2540 G-2011 Result Qualifier Dilution Analysis Batch Analyte %date / time Total Solids 92.4 1 05/28/2021 13:31 WG1678723 Metals (ICP) by Method 6010B Result (dry)Qualifier RDL (dry)Dilution Analysis Batch Analyte mg/kg mg/kg date / time Arsenic 11.6 2.16 1 05/28/2021 11:46 WG1678080 Lead 84.7 0.541 1 05/28/2021 11:46 WG1678080 1 Cp 2 Tc 3 Ss 4 Cn 5 Sr 6 Qc 7 Gl 8 Al 9 Sc ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE: GSC/Kleinfelder - SLC 20201466 L1357191 06/01/21 11:14 8 of 13 ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE: GSC/Kleinfelder - SLC 20201466 L1357191 06/01/21 11:49 8 of 13 QUALITY CONTROL SUMMARYWG1678723 Total Solids by Method 2540 G-2011 L1357191-01,02,03,04 Method Blank (MB) (MB) R3660781-1 05/28/21 13:31 MB Result MB Qualifier MB MDL MB RDL Analyte %%% Total Solids 0.00200 L1357191-04 Original Sample (OS) • Duplicate (DUP) (OS) L1357191-04 05/28/21 13:31 • (DUP) R3660781-3 05/28/21 13:31 Original Result DUP Result Dilution DUP RPD DUP Qualifier DUP RPD Limits Analyte %%%% Total Solids 92.4 92.8 1 0.454 10 Laboratory Control Sample (LCS) (LCS) R3660781-2 05/28/21 13:31 Spike Amount LCS Result LCS Rec.Rec. Limits LCS Qualifier Analyte %%%% Total Solids 50.0 50.0 100 85.0-115 1 Cp 2 Tc 3 Ss 4 Cn 5 Sr 6 Qc 7 Gl 8 Al 9 Sc ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE: GSC/Kleinfelder - SLC 20201466 L1357191 06/01/21 11:14 9 of 13 ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE: GSC/Kleinfelder - SLC 20201466 L1357191 06/01/21 11:49 9 of 13 QUALITY CONTROL SUMMARYWG1678080 Metals (ICP) by Method 6010B L1357191-01,02,03,04 Method Blank (MB) (MB) R3660721-1 05/28/21 10:29 MB Result MB Qualifier MB MDL MB RDL Analyte mg/kg mg/kg mg/kg Arsenic U 0.518 2.00 Lead U 0.208 0.500 Laboratory Control Sample (LCS) (LCS) R3660721-2 05/28/21 10:32 Spike Amount LCS Result LCS Rec.Rec. Limits LCS Qualifier Analyte mg/kg mg/kg %% Arsenic 100 93.2 93.2 80.0-120 Lead 100 94.6 94.6 80.0-120 L1356894-02 Original Sample (OS) • Matrix Spike (MS) • Matrix Spike Duplicate (MSD) (OS) L1356894-02 05/28/21 10:34 • (MS) R3660721-5 05/28/21 10:42 • (MSD) R3660721-6 05/28/21 10:44 Spike Amount (dry) Original Result (dry)MS Result (dry)MSD Result (dry)MS Rec.MSD Rec.Dilution Rec. Limits MS Qualifier MSD Qualifier RPD RPD Limits Analyte mg/kg mg/kg mg/kg mg/kg %%%%% Arsenic 109 5.16 100 102 87.6 89.3 1 75.0-125 1.82 20 Lead 109 9.19 107 109 89.9 91.9 1 75.0-125 1.96 20 1 Cp 2 Tc 3 Ss 4 Cn 5 Sr 6 Qc 7 Gl 8 Al 9 Sc ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE: GSC/Kleinfelder - SLC 20201466 L1357191 06/01/21 11:14 10 of 13 ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE: GSC/Kleinfelder - SLC 20201466 L1357191 06/01/21 11:49 10 of 13 GLOSSARY OF TERMS Guide to Reading and Understanding Your Laboratory Report The information below is designed to better explain the various terms used in your report of analytical results from the Laboratory. This is not intended as a comprehensive explanation, and if you have additional questions please contact your project representative. Results Disclaimer - Information that may be provided by the customer, and contained within this report, include Permit Limits, Project Name, Sample ID, Sample Matrix, Sample Preservation, Field Blanks, Field Spikes, Field Duplicates, On-Site Data, Sampling Collection Dates/Times, and Sampling Location. Results relate to the accuracy of this information provided, and as the samples are received. Abbreviations and Definitions (dry)Results are reported based on the dry weight of the sample. [this will only be present on a dry report basis for soils]. MDL Method Detection Limit. RDL Reported Detection Limit. RDL (dry)Reported Detection Limit. Rec.Recovery. RPD Relative Percent Difference. SDG Sample Delivery Group. 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: GSC/Kleinfelder - SLC 20201466 L1357191 06/01/21 11:14 11 of 13 ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE: GSC/Kleinfelder - SLC 20201466 L1357191 06/01/21 11:49 11 of 13 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: GSC/Kleinfelder - SLC 20201466 L1357191 06/01/21 11:14 12 of 13 ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE: GSC/Kleinfelder - SLC 20201466 L1357191 06/01/21 11:49 12 of 13