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Home My WebLink AboutRES2024-050 Jesse Lee Home Site Mitigation1 1 1 Sponsored by: Sorensen CITY OF SEWARD, ALASKA RESOLUTION 2024-050 A RESOLUTION OF THE CITY COUNCIL OF THE CITY OF SEWARD, ALASKA, AUTHORIZING THE CITY MANAGER TO ACCEPT THE PROPOSAL FROM KASTELER CONSULTING, INC. (KCI) FOR ADDITIONAL INVESTIGATION AND MITIGATION WORK ON THE JESSE LEE HOME PROPERTY IN AN AMOUNT NOT TO EXCEED $48,946.55 AND APPROPRIATING FUNDS WHEREAS, in 2020, the City Council directed the City Manager to demolish the Jesse Lee Home structures and mitigate the property for future community use; and WHEREAS, in August of 2020, the City Council passed resolution 2020-074 which authorized the City Manager to enter into a contract with Coldfoot Environmental Services, Inc. for demolition, abatement, and removal services; and WHEREAS, Kasteler Consulting, Inc., Coldfoot Environmental Services, Inc. and City Administration developed an Environmental Work Plan for final clean-up and mitigation of the Jesse Lee Home property; and WHEREAS, during the excavation, removal, and testing process, more contaminated material was found that has required significant additional mitigation; and WHEREAS, due to deep and significant levels of additional contaminated soil recently discovered, the strategy has changed from removal to a containment and controls strategy; and WHEREAS, this proposed work with KCI will allow the City to take the next step in getting the site to where it can be approved for use. NOW, THEREFORE, BE IT RESOLVED BY THE CITY COUNCIL OF THE CITY OF SEWARD, ALASKA that: Section 1. The City Manager is authorized to accept the proposal from Kasteler Consulting, Inc. (KCI) for the investigative drilling and removal of contaminated material on the Jesse Lee Home property in an amount not to exceed $48,946.55. Section 2. The amount of $48,946.55 is hereby appropriated from General Fund to be transferred from the account no. 01000-0000-3710 will be transferred to the Jesse Lee Home Fund City Funding account 80090-0000-3700 to the account 80090-0000-7009 contracted services. Section 3. This resolution shall take effect immediately upon adoption. CITY OF SEWARD, ALASKA RESOLUTION 2024-050 Page 2 of 2 PASSED AND APPROVED by the City Council of the City of Seward, Alaska, this 23`d day of September 2024. THE CITY OF SEWARD, ALASKA Sue McClure, Mayor AYES: Finch, Barnwell, Crites, Calhoon, Osenga, Wells, McClure NOES: None ABSENT: None ABSTAIN: None ATTEST: /z Kris Peck City Clerk (City Seal) 1 1 City Council Agenda Statement Meeting Date: September 23, 2024 To: City Council Through: Kat Sorensen, City Manager From: Jason Bickling, Deputy City Manager Subject: Resolution 2024-050: Authorizing the City Manager to Accept a Proposal from Kasteler Consulting Inc. (KCI) for Additional Investigation and Mitigation Work on the Jesse Lee Home Property in an Amount Not to Exceed $48,946.55 and Appropriating Funds Background and justification: Excerpts from KCI Report (full report attached): History of Mitigation Mitigation work began in the Spring of 2021. During this time, Coldfoot Environmental Services Inc. successfully completed abatement and demolition of the Jewel and Balto structures, leaving just the concrete building foundations. Coldfoot contracted KCI to assist with characterization and disposal of petroleum, oil, and lubricant (POL) contaminated concrete, as well as the investigation of other potential environmental concerns such as floor drains, subsurface utility connections (water and septic), and lastly, to evaluate for potential soil contamination related to the site buildings. Initial environmental site investigative work was conducted in June 2021 following building demolition, along with investigative findings and soil sample collection for analysis of POLs and metals to be compared against ADEC regulatory cleanup levels. A total of 216 tons of contaminated soil was removed from the Jewel and Balto Building Footprints. Soil contaminated with DRO, RRO, VOCs and PAHs was shipped by container to Columbia Ridge Subtitle C landfill in Arlington, Oregon for disposal, which is a permitted Hazardous Waste Treatment, Storage and Disposal Facility (TSDF) in accordance with Code of Federal Regulations (CFR), Title 49, Chapters 171-180 The contaminated material from this site was given Environmental Protection Agency (EPA) Resource Conservation and Recovery Act (RCRA) ID: AKR000209668 for waste profiling, manifesting, tracking, and disposal. During November of 2021, KCI collected 10 soil samples for laboratory analysis to characterize the soil beneath the Balto Building. The samples were analyzed for Volatile Organic Compounds (VOC), DRO, Residual Range Organics (RRO), Polyaromatic Hydrocarbons (PAHs) and RCRA Metals. The results of the samples indicated contamination remained in the subsurface and additional follow-on excavation and investigation would be required. An Environmental Work Plan (WP) was developed in accordance with the requirements of ADEC 18 Alaska Administrative Code (AAC) 75, Oil and Other Hazardous Substances Pollution Control (October 2023) and the ADEC Field Sampling Guidance (January 2022). The WP incorporated the analytical results from the November 2021 activities and was produced with the objective of achieving Cleanup Complete status with Institutional Controls (ICs). Work at the site continued in 2022, when KCI returned to complete contaminated concrete segregation and removal resulting from the Balto building demolition. Additional areas of concern included the Balto Building excavation areas in relation to the boiler sump, fuel piping, and above ground storage tank (AST) containment were addressed under this mobilization. Additional soil was removed from the excavation floor of the Balto Building, due to results from the 2021 samples indicating DRO remaining in the soil extending the excavation north and west from the building footprint. An additional 3CYofsoil was removed to address the remaining DRO contamination below the Balto Building. In June of 2022, KCI collected nine soil samples for laboratory analysis for excavation profile confirmation. These samples were submitted to SGS Laboratory and processed. After the completion of the 2022 site work, KCI did not recommend further Remedial Action (RA) Activities at the site due to the following: • Elevated Mercury levels, which had previously been associated with the Jewel and Balto building structures and appurtenances, ceased to exist indicating successful cleanup efforts, • Very low volatile organic vapor results were observed during Heated Head Space (HHS) soil field screening efforts, • The depth of contamination of DRO and Arsenic, which had been identified in the soil through analytical results, exists at least 15 feet below ground surface (bgs) and the excavation is planned to be backfilled and capped by clean material. • There is no groundwater use in the area and any development of water utilities in the future would only require a depth of excavation of eight to ten feet bgs, eliminating potential to encounter any remaining contamination. On August 11, 2023, the ADEC approved the KCI report which detailed the RA Activities. However, the ADEC Contaminated Sites Program Manager indicated additional soil samples would be necessary to be collected from locations where DRO and Napthalene displayed elevated results in order to measure natural attenuation of the analytes, and to provide an additional line of evidence to support the determination of the nature of the Arsenic measured in soil. In response to the ADEC August 2023 determination, KCI returned to the demolished Jesse Lee Home - Orphanage Site in September 2023 to collect soil samples to monitor for natural attenuation of diesel range organics (DRO) and Naphthalene. In this investigation, the DRO exceedance results in the co -located 2023 analytical soil samples indicated natural attenuation had been successfully taking place as compared to the 2022 samples. Additionally, it was confirmed that the baseline levels of Arsenic are naturally elevated in the area and are not due to the building demolition. The ADEC, City of Seward, and KCI discussed remaining soil conditions, and path to site closure on June 17th, 2024. The ADEC requested an additional investigation take place to confirm that the pathway to groundwater at the site is not complete. A work plan was proposed by KCI to further characterize any remaining contamination at this site. This plan, reported on in this document, was to perform test pits with a mini -excavator to the greatest depth possible by the machine, or until bedrock was encountered, in order to screen and sample the subsurface soil. A total of two tests pits were proposed to be advanced across the site to perform vertical profile field screening with a Photo -ionization Detector (PID) as described in the Field Sampling Guidance (ADEC 2022) and to collect discrete grab soil samples from each location for laboratory analysis. When revisited in 2024, remaining contamination was unexpectedly encountered during test pitting between the depths of five feet below excavation base, or 22 ft below surface, to the extent practicable with the excavator, or approximately nine feet below base of excavation. Characterization samples were collected from the base of the test pits to aid in determining a path forward. Conclusions and Recommendations: KCI's July 2024 Jesse Lee Home effort detailed in this report began as a remedial investigation to close the site. The excavation of two test pits, Test Pit 1 in the Northwest corner of the Balto building site and Test Pit 2, and the subsequent discovery of contaminated soil, led to the removal of 6-cubic yards of impacted soil contained in super sacks. An analytical sample, and one duplicate sample, was collected for laboratory processing from the base of each of the test pits and analyzed for DRO. Each of the two primary, and one duplicate sample, displayed elevated DRO results. The results of these samples suggest that contamination remains in the subsurface, and further investigation is recommended to ensure the site is safe to close. Due to the depth of contamination at this site, estimated at nearly 20 ft below original ground surface, it is recommended to request site closure with institutional controls once additional information is obtained on contamination remaining in place. It is recommended to perform an additional Remedial Investigation that includes advancing soil borings at the site to more completely define the vertical and horizontal extents of contamination and if any impact to groundwater has taken place. KCI plans to develop an additional Remedial Investigation Work Plan on behalf of the City of Seward to complete remedial investigation and determine the path to site closure. This Work Plan will be submitted for review and approval to the ADEC prior to activities on site. Mitigation Budget History: 2020-074 accepted state grant $1,073,441 (80093-0000-4252) Grant funds were used to pay for: mitigation, fill and grade, playground equipment, and memorial park signs and benches. 2020-074 $484,940 + 10% Contingency ($533,434) Initial mitigation project paid by grant 2022-064 $95,603 — additional mitigation - paid by grant 2022-099 $211,652 — additional mitigation - $40,000 paid by grant, $171,652 paid by general fund We've also paid ADEC $2358.29 in processing to this point and just received another invoice for $158.87. 2024-### $48,946 Current Resolution Request ITIL Comprehensive and Strategic Plan Consistency Information This legislation is consistent with (citation listed): Comprehensive Plan: 3.6.1 Improve, expand and diversify year-round parks and recreational opportunities. 3.9.1.2 Encourage the recognition, rehabilitation and preservation of prehistoric and historic sites, transportation routes, trails, buildings, objects, and artifacts. Strategic Plan: Provide diverse, year-round, indoor and outdoor recreational, educational, and cultural opportunities and facilities for residents and visitors of all ages and socioeconomic backgrounds. Resolution 2020-074, Resolution 2022-064, Resolution 2022-099 Other: Certification of Funds Total amount of funds listed in this legislation: $ 48,946.55 This legislation (✓): Creates revenue in the amount of: Creates expenditure in amount of: Creates a savings in the amount of: Has no fiscal impact x Funds are (✓): Budgeted Line item(s): Not budgeted Not applicable x $ 48,946.55 Fund Balance Information Affected Fund (✓): General Boat Harbor Motor Pool x Available Fund Balance x Yes SMIC Parking Other Electric Water Attorney Signature: Not applicable Comments: Wastewater Healthcare Note: amounts are unaudited Finance Director Signature: cal Attorney Review Administration Recommendation x Adopt Resolution Other: Seward Orphanage — Jesse Lee Home Building Demolition Seward, Alaska Draft Follow -On Remedial Investigation Report ADEC File # 2332.38.054 Hazard ID: 27559 September 2024 Created For City of Seward, P.O. Box 167 410 Adams Street City Hall Building, Seward, AK 99664 Created By Richard Todd Kasteler, P.E., QEP Kasteler Consulting, Incorporated This page was intentionally left blank. Kasteler Consulting, Incorporated ADEC Certified Environmental Engineering Professionals 10351 Kew Ct Anchorage, AK 99507 An Alaska Owned and Operated Small Business Since 2012 TABLE OF CONTENTS ACRONYMS AND ABBREVIATIONS ii 1. INTRODUCTION 1 1.1 SITE BACKGROUND 1 2. REGULATORY SETTING AND CLEANUP CRITERIA 5 3. REMEDIAL Investigation ACTIVITIES 6 3.1 Field Screening Methodology 7 4. ANALYTICAL RESULTS 9 5. WASTE MANAGEMENT 10 6. CONCLUSIONS AND RECOMMENDATIONS 11 7. REFERENCES 12 FIGURES FIGURE 1 2024 Test Pit and Sample Locations TABLE 2.1 TABLE 3.1 TABLE 4.0 APPENDIX A APPENDIX B APPENDIX C APPENDIX D TABLES Soil Cleanup Levels Field Screen & Analytical Sample Summary Sample Exceedance Results Summary APPENDICES Photographic Log Field Logbook Notes SGS Laboratory Analytical Reports Chemistry Review and ADEC Checklists City of Seward Jesse Lee Home Remedial Action Report i V. 09/02/2024 Kasteler Consulting, Incorporated ADEC Certified Environmental Engineering Professionals 10351 Kew Ct Anchorage, AK 99507 An Alaska Owned and Operated Small Business Since 2012 ACRONYMS AND ABBREVIATIONS KASTELER COAStllilO6 INC AK Alaska °C degrees Celsius °F degrees Fahrenheit ft2 Square Feet mg/kg milligram(s) per kilogram mg/L milligram(s) per liter mL milliliter(s) oz ounce pg/kg microgram(s) per kilogram pg/L microgram(s) per liter AAC Alaska Administrative Code ADEC Alaska Department of Environmental Conservation bgs Below Ground Surface BTEX Benzene, Toluene, Ethylbenzene, and Xylene CoC Chain of Custody COC Contaminant of Concern DL Detection Limits DQA Data Quality Assessment DRO Diesel Range Organics EPA Environmental Protection Agency GRO Gasoline Range Organics HHS Heated Head Space IDW Investigation -Derived Waste LCS/LCSD Laboratory Control Sample LCSD Laboratory Control Sample Duplicate LOD Limit of Detection (% LOQ) LOQ Limit of Quantitation McOH Methanol MigtGW Migration to Groundwater MS/MSD Matrix Spike / Matrix Spike Duplicate PAH Polynuclear Aromatic Hydrocarbons PAL Project Action Level PID Photo -Ionization Detector POL Petroleum, Oil, and Lubricants ppm Parts Per Million QC Quality Control SIM Single Ion Monitoring SPAR Division of Spill Prevention and Response TLC Teflon Lined Cap TLS Teflon Lined Septa TMB Trimethylbenzene VOC Volatile Organic Compounds City of Seward Jesse Lee Home Remedial Action Report ii V. 09/02/2024 Kasteler Consulting, Incorporated ADEC Certified Environmental Engineering Professionals 10351 Kew Ct Anchorage, AK 99507 An Alaska Owned and Operated Small Business Since 2012 1. INTRODUCTION This report details recent and historical soil investigation activities performed by Kasteler Consulting, Inc. (KCI) to investigate the subsurface of the Jesse Lee Home - Balto Building Orphanage demolition site located at 1926 Pheonix Rd, Seward, AK 99664. The location of the site in comparison with the City of Seward can be found in Figure 1, at the end of the report. The Alaska Department of Environmental Conservation (ADEC), City of Seward, and KCI discussed soil conditions and a path to site closure on June 17th, 2024. The ADEC requested an additional investigation take place to confirm that the pathway to Groundwater at the site is not complete. A work plan was developed in accordance with 18 AAC 75 regulations in order to achieve cleanup. KCI remobilized July 3rd, 2024, to conduct this investigation. The Qualified Environmental Professionals (QEP) on site were Jackie Rowley and Harmony Hirsch, assisted by Josh Solomon. 1.1 SITE BACKGROUND After several unsuccessful attempts were made to restore the Jesse Lee Home (henceforth, referred to as the site) the former Orphanage in Seward, Alaska, the City of Seward voted in 2020 to demolish the Jewel and Balto buildings, which were the remaining two structures at the site. Work began in the Spring of 2021. During this time, Coldfoot Environmental Services Inc. (Coldfoot) successfully completed abatement and demolition of the Jewel and Balto structures, leaving just the concrete building foundations. Coldfoot contracted KCI to assist with characterization and disposal of petroleum, oil, and lubricant (POL) contaminated concrete, as well as the investigation of other potential environmental concerns such as floor drains, subsurface utility connections (water and septic), and lastly, to evaluate for potential soil contamination related to the site buildings. Initial environmental site investigative work was conducted in June 2021 following building demolition, along with investigative findings and soil sample collection for analysis of POLs and metals to be compared against ADEC regulatory cleanup levels. A total of 216 tons of contaminated soil was removed from the Jewel and Balto Building Footprints. Soil contaminated with DRO, RRO, VOCs and PAHs was shipped by container to Columbia Ridge Subtitle C landfill in Arlington, Oregon for disposal, which is a permitted Hazardous Waste Treatment, Storage and Disposal Facility (TSDF) in accordance with Code of Federal Regulations (CFR), Title 49, Chapters 171-180 The contaminated material from this site was given Environmental Protection Agency (EPA) Resource Conservation and Recovery Act (RCRA) ID: AKR000209668 for waste profiling, manifesting, tracking, and disposal. During November of 2021, KCI collected 10 soil samples for laboratory analysis to characterize the soil beneath the Balto Building. These samples were submitted to SGS Laboratory and processed under Work Order 1222963. The samples represented the following excavation areas: • Six primary samples below the Balto Building Excavation Floor, including 1 duplicate. City of Seward Jesse Lee Home Remedial Action Report 1 V. 09/02/2024 Kasteler Consulting, Incorporated ADEC Certified Environmental Engineering Professionals 10351 Kew Ct Anchorage, AK 99507 An Alaska Owned and Operated Small Business Since 2012 • Four primary samples from the Balto Building Excavation Sidewalls (1 each from the north, east, south, and west) The samples were analyzed for Volatile Organic Compounds (VOC), DRO, Residual Range Organics (RRO), Polyaromatic Hydrocarbons (PAHs) and RCRA Metals. A summary of these samples can be found attached at the end of the report in Table 1.1 - Seward Orphanage - Jessie Lee Home Removal Action Sample Summary (2021, 2022, 2023 & 2024). The results of the samples from Work Order 1222963 indicated contamination remained in the subsurface and additional follow-on excavation and investigation would be required. An Environmental Work Plan (WP) was developed in accordance with the requirements of ADEC 18 Alaska Administrative Code (AAC) 75, Oil and Other Hazardous Substances Pollution Control (October 2023) and the ADEC Field Sampling Guidance (January 2022). The WP incorporated the analytical results from the November 2021 activities and was produced with the objective of achieving Cleanup Complete status with Institutional Controls (ICs). The City of Seward would like to restore the property to develop a city park. Work at the site continued in 2022, when KCI returned to complete contaminated concrete segregation and removal resulting from the Balto building demolition. Additional areas of concern included the Balto Building excavation areas in relation to the boiler sump, fuel piping, and above ground storage tank (AST) containment were addressed under this mobilization. Additional soil was removed from the excavation floor of the Balto Building, due to results from the 2021 samples indicating DRO remaining in the soil extending the excavation north and west from the building footprint. An additional 3CY of soil was removed to address the remaining DRO contamination below the Balto Building. In June of 2022, KCI collected nine soil samples for laboratory analysis for excavation profile confirmation. These samples were submitted to SGS Laboratory and processed under Work Order 1222963. The samples represented the following excavation areas: • Two samples from below the Balto Building Floor (including 1 duplicate) • Two samples from the Balto Building Excavation Sidewalls (north and west) • One sample from the Jewel Building Excavation Floor • Four samples from the Jewel Building excavation sidewalls (1 each from the north, east, south and west) A detailed summary of the field work completed in 2022, as well as a more in-depth discussion of the analytical results can be found in the report written and submitted by KCI in February 2023 titled, "Seward Orphanage - Jessie Lee Home Building Demolition, Seward, AK; ADEC File #2332.38.054; Hazard ID: 27559." After the completion of the 2022 site work, KCI did not recommend further Remedial Action (RA) Activities at the site due to the following: • Elevated Mercury levels, which had previously been associated with the Jewel and Balto building structures and appurtenances, ceased to exist indicating successful cleanup efforts, City of Seward Jesse Lee Home Remedial Action Report 2 V. 09/02/2024 Kasteler Consulting, Incorporated ADEC Certified Environmental Engineering Professionals 10351 Kew Ct Anchorage, AK 99507 An Alaska Owned and Operated Small Business Since 2012 • Very low volatile organic vapor results were observed during Heated Head Space (HHS) soil field screening efforts, • The depth of contamination of DRO and Arsenic, which had been identified in the soil through analytical results, exists at least 15 feet below ground surface (bgs) and the excavation is planned to be backfilled and capped by clean material, • There is no groundwater use in the area and any development of water utilities in the future would only require a depth of excavation of eight to ten feet bgs, eliminating potential to encounter any remaining contamination. On August 11, 2023, the ADEC approved the KCI report which detailed the RA Activities. However, the ADEC Contaminated Sites Program Manager indicated additional soil samples would be necessary to be collected from locations where DRO and Napthalene displayed elevated results in order to measure natural attenuation of the analytes, and to provide an additional line of evidence to support the determination of the nature of the Arsenic measured in soil. In response to the ADEC August 2023 determination, KCI returned to the demolished Jesse Lee Home - Orphanage Site in September 2023 to collect soil samples to monitor for natural attenuation of diesel range organics (DRO) and Naphthalene. Samples collected during this field mobilization include: • Four primary, and 1 duplicate sample, co -located with previous 2022 samples, analyzed for DRO to display natural attenuation and measure Arsenic quantities • Two primary samples analyzed for metals from outside of the excavation boundary in order to measure naturally occurring Arsenic levels in the area. • Investigation of naturally occurring Arsenic in the general site location to further understand baseline Arsenic levels at the Jesse Lee Orphanage Site. The analytical results from the September 2023 investigation can be found in the report written and submitted by KCI in February 2024 titled, "Seward Orphanage - Jessie Lee Home Building Demolition, Seward, AK; ADEC File #2332.38.054; Hazard ID: 27559." In this investigation, the DRO exceedance results in the co -located 2023 analytical soil samples indicated natural attenuation had been successfully taking place as compared to the 2022 samples. Additionally, it was confirmed that the baseline levels of Arsenic are naturally elevated in the area and are not due to the building demolition. The ADEC, City of Seward, and KCI discussed remaining soil conditions, and path to site closure on June 17th, 2024. The ADEC requested an additional investigation take place to confirm that the pathway to groundwater at the site is not complete. A work plan was proposed by KCI to further characterize any remaining contamination at this site. This plan, reported on in this document, was to perform test pits with a mini -excavator to the greatest depth possible by the machine, or until bedrock was encountered, in order to screen and sample the subsurface soil. A total of two tests pits were proposed to be advanced across the site to perform vertical profile field screening with a Photo -ionization Detector (PID) as described in the Field Sampling Guidance (ADEC 2022) and to collect discrete grab soil samples from each location for laboratory analysis. When revisited in 2024, remaining contamination was unexpectedly encountered during test City of Seward Jesse Lee Home Remedial Action Report 3 V. 09/02/2024 Kasteler Consulting, Incorporated ADEC Certified Environmental Engineering Professionals 10351 Kew Ct Anchorage, AK 99507 An Alaska Owned and Operated Small Business Since 2012 KASTELER COAStllilO6 INC pitting between the depths of five feet below excavation base, or 22-ft below surface, to the extent practicable with the excavator, or approximately nine feet below base of excavation. Characterization samples were collected from the base of the test pits to aid in determining a path forward. The excavation site remains open, however, a chain -link fence with a secured locked gate is in place to prevent unauthorized access. Figure 2 attached at the end of the report displays locations of all 2021, 2022, 2023, and 2024 samples. A Data Summary Table displays sample results of soil remaining in insitu at the site. City of Seward Jesse Lee Home Remedial Action Report 4 V. 09/02/2024 Kasteler Consulting, Incorporated ADEC Certified Environmental Engineering Professionals 10351 Kew Ct Anchorage, AK 99507 An Alaska Owned and Operated Small Business Since 2012 2. REGULATORY SETTING AND CLEANUP CRITERIA The ADEC is the regulatory agency overseeing this investigative effort. The regulatory framework for this project was developed under consideration of the following regulations and guidance documents: • 18 AAC 75, Oil and Other Hazardous Substances Pollution Control, October 2023. • ADEC Field Sampling Guidance, January 2022. • ADEC, Characterization Work Plan and Reporting Guidance for Investigation of Contaminated Sites, March 2017. The sampling was conducted by an ADEC Qualified Environmental Professional, as defined in 18 AAC 75.333 and 18 AAC 78.088. Laboratory analysis for potential contaminants of concern were done in accordance with ADEC FSG Appendix F — Diesel and will include the following: • Diesel Range Organics (DRO) by Method AK 102 • Volatile Organic Compounds (VOCs) by Method 8260 The cleanup criteria for this project were ADEC's Method 2 soil cleanup levels as outlined in ADEC regulations 18 AAC 75.340, Tables B1 and B2, Over 40 Inch Zone, Migration to Groundwater (MTG). Table 2.1: Soil Cleanup Levels Contaminants Cleanup Level (mg/kg) C10-C25 Diesel range organics (DRO) 250 Note: mg/kg = milligram per kilogram City of Seward Jesse Lee Home Remedial Action Report 5 V. 09/02/2024 Kasteler Consulting, Incorporated ADEC Certified Environmental Engineering Professionals 10351 Kew Ct Anchorage, AK 99507 An Alaska Owned and Operated Small Business Since 2012 3. REMEDIAL INVESTIGATION ACTIVITIES Remedial investigation activities were performed at the site on July 3rd, 2024. A photographic log depicting field operations and the site conditions during the investigative effort is presented in Appendix A. Copies of the field notes are provided in Appendix B. KCI personnel mobilized to Seward from Anchorage on the morning of July 3rd, 2024. The team arrived at the Jesse Lee Home site and met with Jason Bickling and an equipment operator, both from the City of Seward. The City of Seward provided access to the secured area of the site to begin work. Once on site, KCI personnel identified the locations of the remaining hot -spot samples from the 2023 investigation. One hot -spot was co -located at the northwest corner of the excavation where previous samples (22SW-21-12 & 23SW-21-12) were collected. This became the site of Test Pit 1 for this investigation. The second hot -spot was co -located in the central west area of the open excavation where previous samples (22SW-19-03, 22SW-24-06, 22-26-12, 22SW-27-12, 23SW- 26-12, 23SW-26-1201) were collected. This became the site of Test Pit 2 for this investigation. These sample locations were found using flagging from previous field screening and i evidence of previous ground disturbance in the soil (depressions). After the sample locations were identified, excavation with a mini -excavator began on Test Pit 1 (TP01). TP01 was advanced to the maximum depth possible with this machine and measured 4-ft by 4-ft with a total depth of 9- ft below base of excavation, or 28 feet bgs. Soil samples were collected at approximately 1-ft intervals during test -pit advancement/excavation. Soil samples were observed for petroleum indicators, field screened using Heated Headspace (HHS) methods and PID volatile organic vapor analysis. Excavation and screening of TP01 continued until a slight petroleum odor was detected in the soil around a depth of 4-ft bgs. At 4.5-ft bgs, the petroleum odor increased significantly, and a sheen was present. The HHS field screening PID results were above action level and the decision was made to remove and package the contaminated soil. Three cubic yards of contaminated soil were excavated and packaged into polyethylene lined super sacks. The excavation reached a total depth of 9-ft from base of excavation, the maximum depth possible for this mini -excavator One soil sample (24CSSWDSO-TP01-09) was collected from the base of TP01 for laboratory analysis. Once TP01 was complete, excavation began on Test Pit 2 (TP02) at the second remaining hot - spot. TP02 final extents measured 4-ft by 4-ft and 9-ft bgs depth. Heated Head Space screenings were taken at approximately 1-ft intervals during advancement. At 4-ft bgs, the same layer of gray, sheeny, odorous soil was discovered. Black staining was present, and an iron oxide layer observed at this depth. Three cubic yards of contaminated soil were removed from this test pit and packaged into super sacks. The mini -excavator reached a maximum depth of 9' in this pit. One soil sample (24CSSWDSO-TP02-09) was collected from the base of TP02. TP02-9' displayed the most elevated PID field screen result, therefore duplicate sample (24CSSWDSO- TP02-10) was taken from this same location. One waste characterization composite sample (24CSSWDSO-WC01) was taken from the six staged supersacks for analyses to provide data for acceptance at an approved Treatment Transport and Disposal Facility (TSDF). City of Seward Jesse Lee Home Remedial Action Report 6 V. 09/02/2024 Kasteler Consulting, Incorporated ADEC Certified Environmental Engineering Professionals 10351 Kew Ct Anchorage, AK 99507 An Alaska Owned and Operated Small Business Since 2012 Test Pit sites were marked with survey flags labeled with test pit names for future identification. The test pits were backfilled with screened clean material and adjacent material to secure and protect the site. After all work was completed, the gate was locked and KCI personnel demobilized. A broad summary of field screenings and analytical samples for each test pit can be found below in Table 3.1. Zone Depth (ft)* PID Results (ppm) Analytical Soil Samples Collected Test Pit 1 1.5 2.8 2.0 2.6 3.0 0.3 4.0 2.2 4.5 21.9 6.0 254.6 7.0 188.1 8.0 222.6 9.0 137.1 24CSSWDSO-TP01-09 Test Pit 2 1 2,1 2 0.3 3 0.3 4 10.0 5 0.1 6 140 7 188 8 187 9 317.9 24CSSWDSO-TP02-09, 24CSSWDSO-TP02-10 (Dup) *Please note the depth of the test pit begins from the base of excavation, or 17' below the ground surface. 3.1 FIELD SCREENING METHODOLOGY The 2024 samples were analyzed using Heated Headspace (HHS) screening methods. The sampler collected soil directly into sealable containers in accordance with the procedures outlined in the ADEC Field Sampling Guidance. Quart -sized Ziploc® bags with double lock seals were used for the headspace containers. The Ziploc® bags were partially filled with soil and immediately sealed to trap the volatile vapors. The headspace samples were then warmed to at least 40° F for a period of 10 minutes but not longer than one hour to permit headspace vapors City of Seward Jesse Lee Home Remedial Action Report 7 V. 09/02/2024 Kasteler Consulting, Incorporated ADEC Certified Environmental Engineering Professionals 10351 Kew Ct Anchorage, AK 99507 An Alaska Owned and Operated Small Business Since 2012 KASTELER C O✓t iu L1II6 I!t to develop in the bag. The screening samples were agitated for 15 seconds at the beginning and end of the headspace development to promote volatilization prior to screening with the PID. The PID was calibrated by KCI personnel on site prior to use. City of Seward Jesse Lee Home Remedial Action Report 8 V. 09/02/2024 Kasteler Consulting, Incorporated ADEC Certified Environmental Engineering Professionals 10351 Kew Ct Anchorage, AK 99507 An Alaska Owned and Operated Small Business Since 2012 4. ANALYTICAL RESULTS All sample results were compared against 18 AAC 75.345 Method 2, Tables 2B and 3, Migration to Groundwater levels, above 40-inch zone. Appendix C provides SGS Laboratory Data Results, and Appendix D provides ADEC checklist and chemically reviewed results. The following table has been provided to display sample results: 'Table 4.1 - Analytical Soil Sample Exceedances Analysis: AK102 SW6020B SW8260D Analyte: Diesel Range Organics Arsenic Naphthalene Clean -Up Level: 250 0.2 38 Work Order Sample ID mg/kg mg/kg ug/kg 1243423 24CSSWDSO-TP01-09 778 0.2 1243423 24CSSWDSO-TP02-09 1840 174 1243423 Duplicate of 24CSSWDSO-TP02- 09 1260 71.3 Waste Characterization Sample 1243423 24CSSWDSO-WC01 1650 9.46 57.81 Test Pit 1(24CSSWDSO-TP01-09) was above exceedance levels for DRO with 778 milligrams per kilogram (mg/kg). Test Pit 2 (24CSSWDSO-TP02-09) was above exceedance levels for both DRO and Naphthalene with 1,840 mg/kg for DRO and 174 micrograms/kilogram (pg/kg) for Napthalene. The waste characterization sample (24CSSWDSO-WC01) had 1650 mg/kg of DRO and 57.8 pg/kg of Naphthalene. Test Pit 1 and the Waste Characterization sample also showed exceedance of Arsenic which has been proven in previous investigations to be at concentrations with the naturally high levels found in Seward. City of Seward Jesse Lee Home Remedial Action Report 9 V. 09/02/2024 Kasteler Consulting, Incorporated ADEC Certified Environmental Engineering Professionals 10351 Kew Ct Anchorage, AK 99507 An Alaska Owned and Operated Small Business Since 2012 5. WASTE MANAGEMENT KASTELER COASYlii “ INC The investigation -derived waste (IDW) generated during the execution of the remedial action efforts included disposable sampling equipment (i.e., nitrile sampling gloves, Ziplock® bags, paper towels, disposable sample spoons, etc.). The spent sampling equipment was placed into garbage bags and disposed of as general refuse. Non-consumables were decontaminated with Alconox for future use. The six cubic yards of contaminated soil excavated from the bases of Test Pit 1 and Test Pit 2 remain on the east side of the site in six sealed super sacks. Waste disposal is being coordinated based on analytical sample results. City of Seward Jesse Lee Home Remedial Action Report 10 V. 09/02/2024 Kasteler Consulting, Incorporated ADEC Certified Environmental Engineering Professionals 10351 Kew Ct Anchorage, AK 99507 An Alaska Owned and Operated Small Business Since 2012 KASTELER COAStllilO6 INC 6. CONCLUSIONS AND RECOMMENDATIONS KCI's July 2024 Jesse Lee Home effort detailed in this report began as a remedial investigation to close the site. The excavation of two test pits, Test Pit 1 in the Northwest corner of the Balto building site and Test Pit 2, and the subsequent discovery of contaminated soil, led to the removal of 6-cubic yards of impacted soil contained in super sacks. An analytical sample, and one duplicate sample, was collected for laboratory processing from the base of each of the test pits and analyzed for DRO. Each of the two primary, and one duplicate sample, displayed elevated DRO results. The results of these samples suggest that contamination remains in the subsurface, and further investigation is recommended to ensure the site is safe to close. Due to the depth of contamination at this site, estimated at nearly 20-ft below original ground surface, it is recommended to request site closure with institutional controls once additional information is obtained on contamination remaining in place. It is recommended to perform an additional Remedial Investigation that includes advancing soil borings at the site to more completely define the vertical and horizontal extents of contamination and if any impact to groundwater has taken place. KCI plans to develop an additional Remedial Investigation Work Plan on behalf of the City of Seward to complete remedial investigation and determine the path to site closure. This Work Plan will be submitted for review and approval to the ADEC prior to activities on site. City of Seward Jesse Lee Home Remedial Action Report 11 V. 09/02/2024 Kasteler Consulting, Incorporated ADEC Certified Environmental Engineering Professionals 10351 Kew Ct Anchorage, AK 99507 An Alaska Owned and Operated Small Business Since 2012 7. REFERENCES ADEC, 2017a. Characterization Work Plan and Reporting Guidance for Investigation of Contaminated Sites. March. ADEC, 2023. Title 18 Alaska Administrative Code 75 Oil and Other Hazardous Substances Pollution Control. October. ADEC, 2022a. Field Sampling Guidance. January. ADEC, 2022b. Technical Memorandum for Guidelines for Data Reporting. August. City of Seward Jesse Lee Home Remedial Action Report 12 V. 09/02/2024 Figures A 21SW-17-02 (Removed 10/2022) 22SW-18-02 (2022) 22SW-21-12 (2022) 23SW-21-12 (2023) 24CSSWDSO-TP01-09 (2024 23SW-25-12 (2023) 22SW-25-12 (2022) 22SW-22-02 (2022) 23SW-22-02 (2023) 22SW-16-03 (2022) 24CSSWDSO-TP02-09 24CSSWDSO-TP02-10 22SW-26-12 (2022 22SW-27-12 (Dup) 23SW-26-12 (2023) 23SW-26-12 (Dup) 22SW-24-06 (2022) $ 21 SW-04-SO (2021) / 22SW-23-3 (2022) 22SW-19-03 (Removed 10/2022) s 4.A 0 SCALE 50 1 I Feet 22SW-28-1 21 SW-05-S 23CS-AR01 (2023) Remov*2I ) 21SW-03-S0 ed 2022) 22SW-20-08 (2022) 22SW-29-3 (2022) • 21SW-01-SO (2021, Removed 2022) 21SW-02-SO (2021, Removed 2022) 21 SW-07-SO (2021) 21SW-08-SO (Dup) a 23CS-AR02 (2023) y 1I4 Z-4wN KASTELER conSuiPr.4 lie 10351 Kew Ct. Anchorage, AK 99507 (907) 301-0342 CLIENT: City of Seward LEGEND: Approximate excavation outline 2024 Test Pit Locations • Analytical Sample Does not exceed CUL • Analytical Sample Exceeds CUL (2024) • Analytical Sample Exceeds CUL (prior to 2024) NOTE: 1. 2024 Samples compared against ADEC Migration to GW City of Seward 2024 Test Pitting After Action Report Seward, Alaska PROJECT NO.: 2024 Cit of Seward DRAWN BY: JMR DATE: Aug 2024 Figure 1 Appendix A Photographic Log Photographic Log City of Seward 7/3/24 Jesse Lee Home Photo #1 0 310° NW (T) ® 60.126226, -149.446226 ±16 m ♦ 58m Date: 07/03/24 Description: Test Pit 1 excavation begins Photographic Log City of Seward 7/3/24 Jesse Lee Home Photo #2 Date: 07/03/2024 Description: Looking into the Test Pit 1 excavation site Photographic Log City of Seward 7/3/24 Jesse Lee Home Photo #3 I • I W NW 270 300 330 . I . N 0 I I• I• I• I• I• I• I• I 0 305° NW (T) 0 60.126219, -149.446267 ±10 m ♦ 58m Date: 07/03/2024 Description: Field Screening Test Pit 2 Photographic Log City of Seward 7/3/24 Jesse Lee Home Photo #4 W 270 . i . i . i NW 300 . i . I . 1 . I 330 0 309° NW (T) 0 60.125817, -149.446207 ±87 m ♦ 49m Date: 07/03/2024 Description: Looking down into the Test Pit 2 excavation site Photographic Log City of Seward 7/3/24 Jesse Lee Home Photo #5 Date: 07/03/2024 Description: Looking down into the Test Pit 2 excavation site where impacted soil was present Photographic Log City of Seward 7/3/24 Jesse Lee Home Photo #6 Date: 07/03/2024 Description: Excavation of Test Pit 2 during the process of impacted soil removal Photographic Log City of Seward 7/3/24 Jesse Lee Home Photo #7 Date: 07/03/2024 Description: Mini -excavator approaching maximum depth of Test Pit 2 Photographic Log City of Seward 7/3/24 Jesse Lee Home Photo #8 Date: 07/03/2024 Description: The site at the completion of field work with super sacks ready for transport Photographic Log City of Seward 7/3/24 Jesse Lee Home Photo #9 Date: 07/03/2024 Description: Test Pit 1 and 2 backfilled and marked with survey flags Appendix B Logbook Notes . q L, (A ArA W3hy Scsse1� I - - %,r4 51:' F ro OSo0: KC.i erw4AIt_v._ A1N(.. --, SJD SAfe})_Tptl k; j o 30,. 1<LI_-_ca‘sck tiN, SwD • Facct or -soar sulDrno.1 41 ii0 0 _ 8` in , p.e,, ;i, W N1 cornea aiG.I3 hokf v+ v1F'A.-Ato '�p �XG�utc T�! i�Jc(AVe& el 1105 : c (AvA\ih9 , t5 1 v r a. �=r � y,,,. ,,g Imo' ;trtaw.: 6qaa') 4)9 r Te g t JP-0 ,4.nrt , en ,lack ski 4 e knDV (31-9-ciA At CZ 1.130- • T40i : r q'o\ 'pal -►.� 0. s a ;r,o 4&k'Pot -3 a.-s Inerr.+ne,��ma'�Ir MI - it a_a QoLc o€y TPQI- 6 a54.6 _44• r ,5\• r -► 70%tea- i901 (-:I 1 Po`a = Co =1 o« •- a.�5�►J Gho -rpc02 tSSw(W) TRt' ! ID cc;4 'ing 3, 0 Pr in PW Yea . 1)5\1—a\ .. a\q -spa 2 TFC4- DI TP- Oa 0.3 63 TRt -e, d.1 -441/ 140 iiva -D? le`d-d �POc2 -06 1_M Scale: 1 square = (--`13-ge4 )•a39 ` eco-m, 4_ ir DycsswO 54D `TR;t-o9 off{ GSSu�b So -T90 a - 09 4?4CSS k?D So-1+1O2 - t a: : . CSlI;fl iuca( (&°„.,pos-; v- DES i1r>wac tAh�; �.,,.,p r� s ea II�cL'�cal �.�-�•� ► °46t-- ►. -S gyp^ A-ed W/sN,ri3O-- -l01 },4a kJ s-� e;1- -y �,t w - ;b -ie- t4H" et .►�, r . a.s.�►.�.�; _ALo� te �' vim �� tt p Scale: 1 square = E E E Appendix C SGS Laboratory Data Package Laboratory Report of Analysis L To: Kasteler Consulting, Inc. (KCI) 10351 Kew Court Anchorage, AK 99507 Report Number: 1243423 Client Project: City of Seward Jesse Lee Dear Todd Kasteler, Enclosed are the results of the analytical services performed under the referenced project for the received samples and associated QC as applicable. The samples are certified to meet the requirements of the National Environmental Laboratory Accreditation Conference Standards. Copies of this report and supporting data will be retained in our files for a period of ten years in the event they are required for future reference. All results are intended to be used in their entirety and SGS is not responsible for use of less than the complete report. Any samples submitted to our laboratory will be retained for a maximum of fourteen (14) days from the date of this report unless other archiving requirements were included in the quote. If there are any questions about the report or services performed during this project, please call Justin at (907) 562-2343. We will be happy to answer any questions or concerns which you may have. Thank you for using SGS North America Inc. for your analytical services. We look forward to working with you again on any additional analytical needs. Sincerely, SGS North America Inc. Justin Nelson 2024.07.24 17:08:33-08'00' Justin Nelson Project Manager Justin.Nelson@sgs.com Date Print Date: 07/24/2024 3:09:11PM SGS North America Inc. 1200 West Potter Drive, Anchorage, AK 99518 t 907.562.2343 f 907.561.5301 www.us.sgs.com Results via Engage Member of SGS Group 1 of 32 SGSI Case Narrative L SGS Client: Kasteler Consulting, Inc. (KCI) SGS Project: 1243423 Project Name/Site: City of Seward Jesse Lee Project Contact: Todd Kasteler Refer to sample receipt form for information on sample condition. 1243418004(1774854MS) (1774855) MS 8260D - Surrogate recovery for 4-Bromofluorobenzene does not meet QC criteria. Sample analyzed three times as PS/MS/MSD, results confirm. 1243418004(1774854MSD) (1774856) MSD 8260D - Surrogate recovery for 4-Bromofluorobenzene does not meet QC criteria. Sample analyzed three times as PS/MS/MSD, results confirm. 1243220020(1773837MS) (1775577) MS 6020B - Metals MS recoveries for several analytes do not meet QC criteria. The post digestion spike was successful. 1243220020(1773837MSD) (1775578) MSD 6020B - Metals MSD recoveries for several analytes do not meet QC criteria. The post digestion spike was successful. *QC comments may be associated with the field samples found in this report. When applicable, comments will be applied to associated field samples. Print Date: 07/24/2024 3:09:12PM SGS North America Inc. 200 West Potter Drive, Anchorage, AK 99518 t 907.562.2343 f 907.561.5301 www.us.sgs.com Member of SGS Group 2 of 32 SG$ Report of Manual Integrations Laboratory ID SW8260D 1243423002 1243423003 1243423004 Client Sample ID 24CSSWDSO-TP02-09 24CSSWDSO-TP02-10 24CSSWDSO-WC01 Manual Integration Reason Code Descriptions Code 0 M SS BLG RP PIR IT SP RSP FPS BLC PNF Description Original Chromatogram Modified Chromatogram Skimmed surrogate Closed baseline gap Reassign peak name Pattern integration required Included tail Split peak Removed split peak Forced peak start/stop Baseline correction Peak not found by software All DRO/RRO analysis are integrated per SOP. Analytical Batch Analyte VMS23417 VMS23417 VMS23417 Naphthalene Naphthalene Naphthalene Reason RP RP RP Print Date: 07/24/2024 3:09:14PM SGS North America Inc. 200 West Potter Drive, Anchorage, AK 99518 t 907.562.2343 f 907.561.5301 www.us.sgs.com Member of SGS Group 3 of 32 SG$ Laboratory Qualifiers Enclosed are the analytical results associated with the above work order. The results apply to the samples as received. All results are intended to be used in their entirety and SGS is not responsible for use of less than the complete report. This document is issued by the Company under its General Conditions of Service accessible at <http://www.sgs.com/en/Terms-and-Conditions.aspx>. Attention is drawn to the limitation of liability, indenmification and jurisdiction issues defined therein. Any holder of this document is advised that information contained hereon reflects the Company's findings at the time of its intervention only and within the limits of Client's instructions, if any. The Company's sole responsibility is to its Client and this document does not exonerate parties to a transaction from exercising all their rights and obligations under the transaction documents. Any unauthorized alteration, forgery or falsification of the context or appearance of this document is unlawful and offenders may be prosecuted to the fullest extent of the law. SGS maintains a formal Quality Assurance/Quality Control (QA/QC) program. A copy of our Quality Assurance Plan (QAP), which outlines this program, is available at your request. The laboratory certification numbers are AK00971 (DW Chemistry & Microbiology) & 17-021 (CS) for ADEC and 2944.01 for DOD ELAP/ISO17025 (RCRA methods: 1020B, 1311, 3010A, 3050B, 3520C, 3550C, 5030B, 5035A, 6020B, 7470A, 7471B, 8015C, 8021B, 8082A, 8260D, 8270E, 8270E-SIM, 9040C, 9045D, 9056A, 9060A, AK101 and AK102/103). SGS is only certified for the analytes listed on our Drinking Water Certification (DW methods: 200.8, 2130B, 2320B, 2510B, 300.0, 4500-CN-C,E, 4500-H-B, 4500-NO3-F, 4500-P-E and 524.2) and only those analytes will be reported to the State of Alaska for compliance. Except as specifically noted, all statements and data in this report are in conformance to the provisions set forth by the SGS QAP and, when applicable, other regulatory authorities. The following descriptors or qualifiers may be found in your report: The analyte has exceeded allowable regulatory or control limits. Surrogate out of control limits. B Indicates the analyte is found in a blank associated with the sample. CCV/CVA/CVB Continuing Calibration Verification CCCV/CVC/CVCA/CVCB Closing Continuing Calibration Verification CL Control Limit DF Analytical Dilution Factor DL Detection Limit (i.e., maximum method detection limit) E The analyte result is above the calibrated range. GT Greater Than IB Instrument Blank ICV Initial Calibration Verification J The quantitation is an estimation. LCS(D) Laboratory Control Spike (Duplicate) LLQC/LLIQC Low Level Quantitation Check LOD Limit of Detection (i.e., 3/4 of the LOQ) LOQ Limit of Quantitation (i.e., reporting or practical quantitation limit) LT Less Than MB Method Blank MS(D) Matrix Spike (Duplicate) ND Indicates the analyte is not detected. RPD Relative Percent Difference TNTC Too Numerous To Count U Indicates the analyte was analyzed for but not detected. Note: Sample summaries which include a result for "Total Solids" have already been adjusted for moisture content. All DRO/RRO analyses are integrated per SOP. J Print Date: 07/24/2024 3:09:16PM SGS North America Inc. 200 West Potter Drive, Anchorage, AK 99518 t 907.562.2343 f 907.561.5301 www.us.sgs.com Member of SGS Group 4 of 32 SGSI Sample Summary Client Sample ID Lab Sample ID Collected Received Matrix 24CSSWDSO-TP01-09 1243423001 07/03/2024 07/08/2024 Soil/Solid (dry weight) 24CSSWDSO-TP02-09 1243423002 07/03/2024 07/08/2024 Soil/Solid (dry weight) 24CSSWDSO-TP02-10 1243423003 07/03/2024 07/08/2024 Soil/Solid (dry weight) 24CSSWDSO-WC01 1243423004 07/03/2024 07/08/2024 Soil/Solid (dry weight) 24CSSWDSO-TB 1243423005 07/03/2024 07/08/2024 Soil/Solid (dry weight) Method Method Description AK102 Diesel Range Organics (S) SW6020B Metals by ICP-MS (S) SM21 2540G Percent Solids SM2540G SW8260D VOC 8260 (S) Field Extracted Print Date: 07/24/2024 3:09:18PM SGS North America Inc. I200 West Potter Drive, Anchorage, AK 99518 t 907.562.2343 f 907.561.5301 www.us.sgs.com Member of SGS Group 5 of 32 SGSI Detectable Results Summary i Client Sample ID: 24CSSWDSO-TP01-09 Lab Sample ID: 1243423001 Parameter Result Units Semivolatile Organic Fuels Diesel Range Organics 778 mg/kg Client Sample ID: 24CSSWDSO-TP02-09 Lab Sample ID: 1243423002 Parameter Result Units Semivolatile Organic Fuels Diesel Range Organics 1840 mg/kg Volatile GC/MS- Petroleum VOC Group 1,3,5-Trimethylbenzene 44.3 ug/kg Naphthalene 174 ug/kg Client Sample ID: 24CSSWDSO-TP02-10 Lab Sample ID: 1243423003 Parameter Result Units Semivolatile Organic Fuels Diesel Range Organics 1260 mg/kg Volatile GC/MS- Petroleum VOC Group Naphthalene 71.3 ug/kg Client Sample ID: 24CSSWDSO-WC01 Lab Sample ID: 1243423004 Parameter Result Units Metals by ICP/MS Arsenic 9.46 mg/kg Barium 35.8 mg/kg Chromium 32.4 mg/kg Lead 12.7 mg/kg Semivolatile Organic Fuels Diesel Range Organics 1650 mg/kg Volatile GC/MS- Petroleum VOC Group Naphthalene 57.8 ug/kg 1 Print Date: 07/24/2024 3:09:20PM SGS North America Inc. West Potter Drive, Anchorage, AK 99518 1200 t 907.562.2343 f 907.561.5301 www.us.sgs.com Member of SGS Group 6 of 32 SG� Results of 24CSSWDSO-TP01-09 Client Sample ID: 24CSSWDSO-TP01-09 Client Project ID: City of Seward Jesse Lee Lab Sample ID: 1243423001 Lab Project ID: 1243423 `Results by Semivolatile Organic Fuels Parameter Diesel Range Organics Surrogates 5a Androstane (surr) Batch Information I Result Qual 778 101 Analytical Batch: XFC16955 Analytical Method: AK102 Analyst: T.L Analytical Date/Time: 07/17/24 10:47 Container ID: 1243423001-A Collection Date: 07/03/24 14:10 Received Date: 07/08/24 15:23 Matrix: Soil/Solid (dry weight) Solids (%):91.4 Location: LOQ/CL DL 21.8 50-150 9.82 Units DF mg/kg 1 1 Allowable Limits Prep Batch: XXX49829 Prep Method: SW3550C Prep Date/Time: 07/16/24 07:19 Prep Initial Wt./Vol.: 22.571 g Prep Extract Vol: 5 mL Date Analyzed 07/17/24 10:47 07/17/24 10:47 Print Date: 07/24/2024 3:09:22PM SGS North America Inc. 907.562.2343 f 907.561.5301 www.us.sgs.com 200 West Potter Drive Anchorage, AK 95518 t Member of SGS Group 7 of 32 SGg Results of 24CSSWDSO-TP01-09 Client Sample ID: 24CSSWDSO-TP01-09 Client Project ID: City of Seward Jesse Lee Lab Sample ID: 1243423001 Lab Project ID: 1243423 `Results by Volatile GC/MS- Petroleum VOC Group Parameter 1,2,4-Trimethylbenzene 1,2-Dibromoethane 1,2-Dichloroethane 1,3,5-Trimethylbenzene Benzene Cyclohexane Ethylbenzene Isopropylbenzene (Cumene) Methyl-t-butyl ether Naphthalene n-Butylbenzene n-hexane n-Propylbenzene o-Xylene P & M -Xylene sec-Butylbenzene tert-Butylbenzene Toluene Xylenes (total) Surrogates 1,2-Dichloroethane-D4 (surr) 4-Bromofluorobenzene (surr) Toluene-d8 (surr) Batch Information Collection Date: 07/03/24 14:10 Received Date: 07/08/24 15:23 Matrix: Soil/Solid (dry weight) Solids (%):91.4 Location: Result Qual LOQ/CL DL 129 U 129 38.8 1.94 U 1.94 0.970 2.59 U 2.59 0.906 32.3 U 32.3 10.1 16.2 U 16.2 5.05 32.3 U 32.3 10.1 32.3 U 32.3 10.1 32.3 U 32.3 10.1 129 U 129 40.1 32.3 U 32.3 10.1 32.3 U 32.3 10.1 32.3 U 32.3 10.1 32.3 U 32.3 10.1 32.3 U 32.3 10.1 64.7 U 64.7 19.4 32.3 U 32.3 10.1 32.3 U 32.3 10.1 32.3 U 32.3 10.1 97.0 U 97.0 29.5 106 71-136 91.4 55-151 98.3 85-116 Analytical Batch: VMS23417 Analytical Method: SW8260D Analyst: PHK Analytical Date/Time: 07/16/24 04:35 Container ID: 1243423001-B Units DF ug/kg 1 ug/kg 1 ug/kg 1 ug/kg 1 ug/kg 1 ug/kg 1 ug/kg 1 ug/kg 1 ug/kg 1 ug/kg 1 ug/kg 1 ug/kg 1 ug/kg 1 ug/kg 1 ug/kg 1 ug/kg 1 ug/kg 1 ug/kg 1 ug/kg 1 1 1 ok 1 Allowable Limits Prep Batch: VXX41477 Prep Method: SW5035A Prep Date/Time: 07/03/24 14:10 Prep Initial Wt./Vol.: 49.482 g Prep Extract Vol: 29.2555 mL Date Analyzed 07/16/24 04:35 07/16/24 04:35 07/16/24 04:35 07/16/24 04:35 07/16/24 04:35 07/16/24 04:35 07/16/24 04:35 07/16/24 04:35 07/16/24 04:35 07/16/24 04:35 07/16/24 04:35 07/16/24 04:35 07/16/24 04:35 07/16/24 04:35 07/16/24 04:35 07/16/24 04:35 07/16/24 04:35 07/16/24 04:35 07/16/24 04:35 07/16/24 04:35 07/16/24 04:35 07/16/24 04:35 Print Date: 07/24/2024 3:09:22PM SGS North America Inc. 907.562.2343 f 907.561.5301 www.us.sgs.com 200 West Potter Drive Anchorage, AK 95518 t Member of SGS Group 8 of 32 SG� Results of 24CSSWDSO-TP02-09 Client Sample ID: 24CSSWDSO-TP02-09 Client Project ID: City of Seward Jesse Lee Lab Sample ID: 1243423002 Lab Project ID: 1243423 `Results by Semivolatile Organic Fuels Parameter Diesel Range Organics Surrogates 5a Androstane (surr) Batch Information I Result Qual 1840 104 Analytical Batch: XFC16955 Analytical Method: AK102 Analyst: T.L Analytical Date/Time: 07/17/24 10:57 Container ID: 1243423002-A Collection Date: 07/03/24 16:09 Received Date: 07/08/24 15:23 Matrix: Soil/Solid (dry weight) Solids (%):92.6 Location: LOQ/CL DL 21.2 50-150 9.56 Units mg/kg Allowable DF Limits Date Analyzed 1 07/17/24 10:57 1 Prep Batch: XXX49829 Prep Method: SW3550C Prep Date/Time: 07/16/24 07:19 Prep Initial Wt./Vol.: 22.873 g Prep Extract Vol: 5 mL 07/17/24 10:57 Print Date: 07/24/2024 3:09:22PM SGS North America Inc. 907.562.2343 f 907.561.5301 www.us.sgs.com 200 West Potter Drive Anchorage, AK 95518 t Member of SGS Group 9 of 32 SGg Results of 24CSSWDSO-TP02-09 Client Sample ID: 24CSSWDSO-TP02-09 Client Project ID: City of Seward Jesse Lee Lab Sample ID: 1243423002 Lab Project ID: 1243423 `Results by Volatile GC/MS- Petroleum VOC Group Parameter 1,2,4-Trimethylbenzene 1,2-Dibromoethane 1,2-Dichloroethane 1,3,5-Trimethylbenzene Benzene Cyclohexane Ethylbenzene Isopropylbenzene (Cumene) Methyl-t-butyl ether Naphthalene n-Butylbenzene n-hexane n-Propylbenzene o-Xylene P & M -Xylene sec-Butylbenzene tert-Butylbenzene Toluene Xylenes (total) Surrogates 1,2-Dichloroethane-D4 (surr) 4-Bromofluorobenzene (surr) Toluene-d8 (surr) Batch Information Collection Date: 07/03/24 16:09 Received Date: 07/08/24 15:23 Matrix: Soil/Solid (dry weight) Solids (%):92.6 Location: Result Qual LOQ/CL DL 122 U 122 36.5 1.82 U 1.82 0.912 2.43 U 2.43 0.851 44.3 30.4 9.48 15.2 U 15.2 4.74 30.4 U 30.4 9.48 30.4 U 30.4 9.48 30.4 U 30.4 9.48 122 U 122 37.7 174 30.4 9.48 30.4 U 30.4 9.48 30.4 U 30.4 9.48 30.4 U 30.4 9.48 30.4 U 30.4 9.48 60.8 U 60.8 18.2 30.4 U 30.4 9.48 30.4 U 30.4 9.48 30.4 U 30.4 9.48 91.2 U 91.2 27.7 Analytical Batch: VMS23417 Analytical Method: SW8260D Analyst: PHK Analytical Date/Time: 07/16/24 06:56 Container ID: 1243423002-B 105 71-136 85.8 55-151 99.2 85-116 Units DF ug/kg 1 ug/kg 1 ug/kg 1 ug/kg 1 ug/kg 1 ug/kg 1 ug/kg 1 ug/kg 1 ug/kg 1 ug/kg 1 ug/kg 1 ug/kg 1 ug/kg 1 ug/kg 1 ug/kg 1 ug/kg 1 ug/kg 1 ug/kg 1 ug/kg 1 1 1 ok 1 Allowable Limits Prep Batch: VXX41477 Prep Method: SW5035A Prep Date/Time: 07/03/24 16:09 Prep Initial Wt./Vol.: 51.089 g Prep Extract Vol: 28.7607 mL Date Analyzed 07/16/24 06:56 07/16/24 06:56 07/16/24 06:56 07/16/24 06:56 07/16/24 06:56 07/16/24 06:56 07/16/24 06:56 07/16/24 06:56 07/16/24 06:56 07/16/24 06:56 07/16/24 06:56 07/16/24 06:56 07/16/24 06:56 07/16/24 06:56 07/16/24 06:56 07/16/24 06:56 07/16/24 06:56 07/16/24 06:56 07/16/24 06:56 07/16/24 06:56 07/16/24 06:56 07/16/24 06:56 Print Date: 07/24/2024 3:09:22PM SGS North America Inc. 907.562.2343 f 907.561.5301 www.us.sgs.com 200 West Potter Drive Anchorage, AK 95518 t Member of SGS Group 10 of 32 SGt Results of 24CSSWDSO-TP02-10 Client Sample ID: 24CSSWDSO-TP02-10 Client Project ID: City of Seward Jesse Lee Lab Sample ID: 1243423003 Lab Project ID: 1243423 `Results by Semivolatile Organic Fuels Parameter Diesel Range Organics Surrogates 5a Androstane (surr) Batch Information 1 Result Qual 1260 99.9 Analytical Batch: XFC16955 Analytical Method: AK102 Analyst: T.L Analytical Date/Time: 07/17/24 11:06 Container ID: 1243423003-A Collection Date: 07/03/24 12:00 Received Date: 07/08/24 15:23 Matrix: Soil/Solid (dry weight) Solids (%):92.7 Location: LOQ/CL DL 21.3 50-150 9.59 Units mg/kg Allowable DF Limits Date Analyzed 1 07/17/24 11:06 1 Prep Batch: XXX49829 Prep Method: SW3550C Prep Date/Time: 07/16/24 07:19 Prep Initial Wt./Vol.: 22.763 g Prep Extract Vol: 5 mL 07/17/24 11:06 Print Date: 07/24/2024 3:09:22PM SGS North America Inc. 907.562.2343 f 907.561.5301 www.us.sgs.com 200 West Potter Drive Anchorage, AK 95518 t Member of SGS Group 11 of 32 SGg Results of 24CSSWDSO-TP02-10 Client Sample ID: 24CSSWDSO-TP02-10 Client Project ID: City of Seward Jesse Lee Lab Sample ID: 1243423003 Lab Project ID: 1243423 `Results by Volatile GC/MS- Petroleum VOC Group Parameter 1,2,4-Trimethylbenzene 1,2-Dibromoethane 1,2-Dichloroethane 1,3,5-Trimethylbenzene Benzene Cyclohexane Ethylbenzene Isopropylbenzene (Cumene) Methyl-t-butyl ether Naphthalene n-Butylbenzene n-hexane n-Propylbenzene o-Xylene P & M -Xylene sec-Butylbenzene tert-Butylbenzene Toluene Xylenes (total) Surrogates 1,2-Dichloroethane-D4 (surr) 4-Bromofluorobenzene (surr) Toluene-d8 (surr) Batch Information Collection Date: 07/03/24 12:00 Received Date: 07/08/24 15:23 Matrix: Soil/Solid (dry weight) Solids (%):92.7 Location: Result Qual LOQ/CL DL 118 U 118 35.3 1.76 U 1.76 0.882 2.35 U 2.35 0.823 29.4 U 29.4 9.17 14.7 U 14.7 4.59 29.4 U 29.4 9.17 29.4 U 29.4 9.17 29.4 U 29.4 9.17 118 U 118 36.5 71.3 29.4 9.17 29.4 U 29.4 9.17 29.4 U 29.4 9.17 29.4 U 29.4 9.17 29.4 U 29.4 9.17 58.8 U 58.8 17.6 29.4 U 29.4 9.17 29.4 U 29.4 9.17 29.4 U 29.4 9.17 88.2 U 88.2 26.8 Analytical Batch: VMS23417 Analytical Method: SW8260D Analyst: PHK Analytical Date/Time: 07/16/24 04:50 Container ID: 1243423003-B 105 71-136 84.2 55-151 99.4 85-116 Units DF ug/kg 1 ug/kg 1 ug/kg 1 ug/kg 1 ug/kg 1 ug/kg 1 ug/kg 1 ug/kg 1 ug/kg 1 ug/kg 1 ug/kg 1 ug/kg 1 ug/kg 1 ug/kg 1 ug/kg 1 ug/kg 1 ug/kg 1 ug/kg 1 ug/kg 1 1 1 ok 1 Allowable Limits Prep Batch: VXX41477 Prep Method: SW5035A Prep Date/Time: 07/03/24 12:00 Prep Initial Wt./Vol.: 52.891 g Prep Extract Vol: 28.843 mL Date Analyzed 07/16/24 04:50 07/16/24 04:50 07/16/24 04:50 07/16/24 04:50 07/16/24 04:50 07/16/24 04:50 07/16/24 04:50 07/16/24 04:50 07/16/24 04:50 07/16/24 04:50 07/16/24 04:50 07/16/24 04:50 07/16/24 04:50 07/16/24 04:50 07/16/24 04:50 07/16/24 04:50 07/16/24 04:50 07/16/24 04:50 07/16/24 04:50 07/16/24 04:50 07/16/24 04:50 07/16/24 04:50 Print Date: 07/24/2024 3:09:22PM SGS North America Inc. 907.562.2343 f 907.561.5301 www.us.sgs.com 200 West Potter Drive Anchorage, AK 95518 t Member of SGS Group 12 of 32 SGt Results of 24CSSWDSO-WC01 Client Sample ID: 24CSSWDSO-WC01 Client Project ID: City of Seward Jesse Lee Lab Sample ID: 1243423004 Lab Project ID: 1243423 `Results by Metals by ICP/MS Parameter Arsenic Barium Cadmium Chromium Lead Mercury Selenium Silver Batch Information Result Qual 9.46 35.8 0.201 U 32.4 12.7 0.201 U 2.01 U 0.502 U Analytical Batch: MMS12365 Analytical Method: SW6020B Analyst: HGS Analytical Date/Time: 07/22/24 11:12 Container ID: 1243423004-A Analytical Batch: MMS12361 Analytical Method: SW6020B Analyst: HGS Analytical Date/Time: 07/20/24 13:44 Container ID: 1243423004-A Collection Date: 07/03/24 16:35 Received Date: 07/08/24 15:23 Matrix: Soil/Solid (dry weight) Solids (%):90.8 Location: LOQ/CL DL 1.00 0.311 0.301 0.0944 0.201 0.0622 1.00 0.311 0.201 0.0622 0.201 0.0703 2.01 0.622 0.502 0.151 Units DF mg/kg 10 mg/kg 10 mg/kg 10 mg/kg 10 mg/kg 10 mg/kg 10 mg/kg 10 mg/kg 10 Prep Batch: MXX36777 Prep Method: SW3050B Prep Date/Time: 07/12/24 12:36 Prep Initial Wt./Vol.: 1.097 g Prep Extract Vol: 50 mL Prep Batch: MXX36777 Prep Method: SW3050B Prep Date/Time: 07/12/24 12:36 Prep Initial Wt./Vol.: 1.097 g Prep Extract Vol: 50 mL Allowable Limits Date Analyzed 07/20/24 13:44 07/20/24 13:44 07/22/24 11:12 07/20/24 13:44 07/22/24 11:12 07/20/24 13:44 07/20/24 13:44 07/20/24 13:44 J Print Date: 07/24/2024 3:09:22PM SGS North America Inc. 907.562.2343 f 907.561.5301 www.us.sgs.com 200 West Potter Drive Anchorage, AK 95518 t Member of SGS Group 13 of 32 SG� Results of 24CSSWDSO-WC01 Client Sample ID: 24CSSWDSO-WC01 Client Project ID: City of Seward Jesse Lee Lab Sample ID: 1243423004 Lab Project ID: 1243423 `Results by Semivolatile Organic Fuels Parameter Diesel Range Organics Surrogates 5a Androstane (surr) Result Qual 1650 Batch Information I Analytical Batch: XFC16955 Analytical Method: AK102 Analyst: T.L Analytical Date/Time: 07/17/24 11:15 Container ID: 1243423004-A 102 Collection Date: 07/03/24 16:35 Received Date: 07/08/24 15:23 Matrix: Soil/Solid (dry weight) Solids (%):90.8 Location: LOQ/CL DL 21.7 50-150 9.75 Units mg/kg Allowable DF Limits Date Analyzed 1 07/17/24 11:15 1 Prep Batch: XXX49829 Prep Method: SW3550C Prep Date/Time: 07/16/24 07:19 Prep Initial Wt./Vol.: 22.864 g Prep Extract Vol: 5 mL 07/17/24 11:15 Print Date: 07/24/2024 3:09:22PM SGS North America Inc. 907.562.2343 f 907.561.5301 www.us.sgs.com 200 West Potter Drive Anchorage, AK 95518 t Member of SGS Group 14 of 32 SGg Results of 24CSSWDSO-WC01 Client Sample ID: 24CSSWDSO-WC01 Client Project ID: City of Seward Jesse Lee Lab Sample ID: 1243423004 Lab Project ID: 1243423 `Results by Volatile GC/MS- Petroleum VOC Group Parameter 1,2,4-Trimethylbenzene 1,2-Dibromoethane 1,2-Dichloroethane 1,3,5-Trimethylbenzene Benzene Cyclohexane Ethylbenzene Isopropylbenzene (Cumene) Methyl-t-butyl ether Naphthalene n-Butylbenzene n-hexane n-Propylbenzene o-Xylene P & M -Xylene sec-Butylbenzene tert-Butylbenzene Toluene Xylenes (total) Surrogates 1,2-Dichloroethane-D4 (surr) 4-Bromofluorobenzene (surr) Toluene-d8 (surr) Batch Information Collection Date: 07/03/24 16:35 Received Date: 07/08/24 15:23 Matrix: Soil/Solid (dry weight) Solids (%):90.8 Location: Result Qual LOQ/CL DL 115 U 115 34.4 1.72 U 1.72 0.861 2.30 U 2.30 0.804 28.7 U 28.7 8.96 14.4 U 14.4 4.48 28.7 U 28.7 8.96 28.7 U 28.7 8.96 28.7 U 28.7 8.96 115 U 115 35.6 57.8 28.7 8.96 28.7 U 28.7 8.96 28.7 U 28.7 8.96 28.7 U 28.7 8.96 28.7 U 28.7 8.96 57.4 U 57.4 17.2 28.7 U 28.7 8.96 28.7 U 28.7 8.96 28.7 U 28.7 8.96 86.1 U 86.1 26.2 Analytical Batch: VMS23417 Analytical Method: SW8260D Analyst: PHK Analytical Date/Time: 07/16/24 05:06 Container ID: 1243423004-B 106 71-136 94.7 55-151 99 85-116 Units DF ug/kg 1 ug/kg 1 ug/kg 1 ug/kg 1 ug/kg 1 ug/kg 1 ug/kg 1 ug/kg 1 ug/kg 1 ug/kg 1 ug/kg 1 ug/kg 1 ug/kg 1 ug/kg 1 ug/kg 1 ug/kg 1 ug/kg 1 ug/kg 1 ug/kg 1 1 1 ok 1 Allowable Limits Prep Batch: VXX41477 Prep Method: SW5035A Prep Date/Time: 07/03/24 16:35 Prep Initial Wt./Vol.: 58.222 g Prep Extract Vol: 30.3528 mL Date Analyzed 07/16/24 05:06 07/16/24 05:06 07/16/24 05:06 07/16/24 05:06 07/16/24 05:06 07/16/24 05:06 07/16/24 05:06 07/16/24 05:06 07/16/24 05:06 07/16/24 05:06 07/16/24 05:06 07/16/24 05:06 07/16/24 05:06 07/16/24 05:06 07/16/24 05:06 07/16/24 05:06 07/16/24 05:06 07/16/24 05:06 07/16/24 05:06 07/16/24 05:06 07/16/24 05:06 07/16/24 05:06 Print Date: 07/24/2024 3:09:22PM SGS North America Inc. 907.562.2343 f 907.561.5301 www.us.sgs.com 200 West Potter Drive Anchorage, AK 95518 t Member of SGS Group 15 of 32 SGg Results of 24CSSWDSO-TB Client Sample ID: 24CSSWDSO-TB Client Project ID: City of Seward Jesse Lee Lab Sample ID: 1243423005 Lab Project ID: 1243423 `Results by Volatile GC/MS- Petroleum VOC Group Parameter 1,2,4-Trimethylbenzene 1,2-Dibromoethane 1,2-Dichloroethane 1,3,5-Trimethylbenzene Benzene Cyclohexane Ethylbenzene Isopropylbenzene (Cumene) Methyl-t-butyl ether Naphthalene n-Butylbenzene n-hexane n-Propylbenzene o-Xylene P & M -Xylene sec-Butylbenzene tert-Butylbenzene Toluene Xylenes (total) Surrogates 1,2-Dichloroethane-D4 (surr) 4-Bromofluorobenzene (surr) Toluene-d8 (surr) Batch Information Collection Date: 07/03/24 12:00 Received Date: 07/08/24 15:23 Matrix: Soil/Solid (dry weight) Solids (%): Location: Result Qual LOQ/CL DL 100 U 100 30.0 1.50 U 1.50 0.750 2.00 U 2.00 0.700 25.0 U 25.0 7.80 12.5 U 12.5 3.90 25.0 U 25.0 7.80 25.0 U 25.0 7.80 25.0 U 25.0 7.80 100 U 100 31.0 25.0 U 25.0 7.80 25.0 U 25.0 7.80 25.0 U 25.0 7.80 25.0 U 25.0 7.80 25.0 U 25.0 7.80 50.0 U 50.0 15.0 25.0 U 25.0 7.80 25.0 U 25.0 7.80 25.0 U 25.0 7.80 75.0 U 75.0 22.8 Analytical Batch: VMS23417 Analytical Method: SW8260D Analyst: PHK Analytical Date/Time: 07/16/24 02:13 Container ID: 1243423005-A 102 71-136 95.7 55-151 97.3 85-116 Units DF ug/kg 1 ug/kg 1 ug/kg 1 ug/kg 1 ug/kg 1 ug/kg 1 ug/kg 1 ug/kg 1 ug/kg 1 ug/kg 1 ug/kg 1 ug/kg 1 ug/kg 1 ug/kg 1 ug/kg 1 ug/kg 1 ug/kg 1 ug/kg 1 ug/kg 1 1 1 ok 1 Allowable Limits Prep Batch: VXX41477 Prep Method: SW5035A Prep Date/Time: 07/03/24 12:00 Prep Initial Wt./Vol.: 50.014 g Prep Extract Vol: 25 mL Date Analyzed 07/16/24 02:13 07/16/24 02:13 07/16/24 02:13 07/16/24 02:13 07/16/24 02:13 07/16/24 02:13 07/16/24 02:13 07/16/24 02:13 07/16/24 02:13 07/16/24 02:13 07/16/24 02:13 07/16/24 02:13 07/16/24 02:13 07/16/24 02:13 07/16/24 02:13 07/16/24 02:13 07/16/24 02:13 07/16/24 02:13 07/16/24 02:13 07/16/24 02:13 07/16/24 02:13 07/16/24 02:13 Print Date: 07/24/2024 3:09:22PM SGS North America Inc. 907.562.2343 f 907.561.5301 www.us.sgs.com 200 West Potter Drive Anchorage, AK 95518 t Member of SGS Group 16 of 32 SG9 Method Blank Blank ID: MB for HBN 1894762 [MXX/36777] Matrix: Soil/Solid (dry weight) Blank Lab ID: 1773835 QC for Samples: 1243423004 Results by SW6020B Parameter Results LOQ/CL DL LOD Units Arsenic 0.750U 1.00 0.310 0.750 mg/kg Barium 0.225U 0.300 0.0940 0.225 mg/kg Cadmium 0.150U 0.200 0.0620 0.150 mg/kg Chromium 0.750U 1.00 0.310 0.750 mg/kg Lead 0.150U 0.200 0.0620 0.150 mg/kg Mercury 0.150U 0.200 0.0700 0.150 mg/kg Selenium 1.50U 2.00 0.620 1.50 mg/kg Silver 0.375U 0.500 0.150 0.375 mg/kg Batch Information Analytical Batch: MMS12361 Analytical Method: SW6020B Instrument: P7 Agilent 7800 Analyst: HGS Analytical Date/Time: 7/20/2024 1:07:41 PM Prep Batch: MXX36777 Prep Method: SW3050B Prep Date/Time: 7/12/2024 12:36:OOPM Prep Initial Wt./Vol.: 1 g Prep Extract Vol: 50 mL Print Date: 07/24/2024 3:09:26PM SGS North America Inc. 200 West Potter Drive Anchorage, AK 95518 t 907.562.2343 f 907.561.5301 www.us.sgs.com Member of SGS Group 17 of 32 SGt Blank Spike Summary Blank Spike ID: LCS for HBN 1243423 [MXX36777] Blank Spike Lab ID: 1773836 Date Analyzed: 07/20/2024 13:10 QC for Samples: 1243423004 Results by SW6020B Parameter Arsenic Barium Cadmium Chromium Lead Mercury Selenium Silver Batch Information Blank Spike (mg/kg) Spike Result Rec (%) 50 46.7 93 50 51.9 104 5 5.03 101 20 20.3 102 50 52.8 106 0.5 0.492 99 50 46.4 93 5 4.87 97 Analytical Batch: MMS12361 Analytical Method: SW6020B Instrument: P7 Agilent 7800 Analyst: HGS ♦ Matrix: Soil/Solid (dry weight) CL (82-118 ) (86-116) (84-116) (83-119) (84-118 ) (74-126) (80-119 ) (83-118 ) l Prep Batch: MXX36777 Prep Method: SW3050B Prep Date/Time: 07/12/2024 12:36 Spike Init Wt./Vol.: 50 mg/kg Extract Vol: 50 mL Dupe Init Wt./Vol.: Extract Vol: Frint uate: U//24/lul4 SGS North America Inc. t 907.562.2343 f 907.561.5301 www.us.sgs.com 200 West Potter Drive Anchorage, AK 95518 Member of SGS Group 18 of 32 SG$ Matrix Spike Summary Original Sample ID: 1773837 MS Sample ID: 1775577 MS MSD Sample ID: 1775578 MSD QC for Samples: 1243423004 `Results by SW6020B Analysis Date: 07/20/2024 13:12 Analysis Date: 07/20/2024 13:15 Analysis Date: 07/20/2024 13:17 Matrix: Soil/Solid (dry weight) Matrix Spike (mg/kg) Spike Duplicate (mg/kg) Parameter Sample Spike Result Rec (%) Spike Result Rec (%) CL RPD (%) RPD CL Arsenic 7.06 48.4 49.4 87 49.7 49.3 85 82-118 0.31 (< 20 ) Barium 56.7 48.4 86 60 * 49.7 92.8 73 * 86-116 7.67 (< 20 ) Cadmium 0.250 4.84 4.92 96 4.97 5.24 100 84-116 6.28 (< 20 ) Chromium 29.0 19.4 35.3 32 * 19.9 36.3 37 * 83-119 2.82 (< 20 ) Lead 6.58 48.4 58.9 108 49.7 58.1 104 84-118 1.37 (< 20 ) Selenium 0.721J 48.4 46.5 95 49.7 46.8 93 80-119 0.66 (<20) Silver 0.361U 4.84 4.59 95 4.97 4.96 100 83-118 7.61 (< 20 ) Batch Information Analytical Batch: MMS12361 Analytical Method: SW6020B Instrument: P7 Agilent 7800 Analyst: HGS Analytical Date/Time: 7/20/2024 1:15:OOPM Prep Batch: MXX36777 Prep Method: Soils/Solids Digest for Metals by ICP-MS Prep Date/Time: 7/12/2024 12:36:OOPM Prep Initial Wt./Vol.: 1.03g Prep Extract Vol: 50.00mL Print Date: 07/24/2024 3:09:32PM SGS North America Inc. 200 West Potter Drive Anchorage, AK 95518 t 907.562.2343 f 907.561.5301 www.us.sgs.com Member of SGS Group 19 of 32 SG$ e—Bench Spike Summary Original Sample ID: 1773837 MS Sample ID: 1773838 BND MSD Sample ID: QC for Samples: 1243423004 `Results by SW6020B Parameter Sample Barium 56.7 Chromium 29.0 Batch Information Matrix Spike (mg/kg) Analysis Date: 07/20/2024 13:12 Analysis Date: 07/20/2024 13:19 Analysis Date: Matrix: Soil/Solid (dry weight) Spike Duplicate (mg/kg) Spike Result Rec (%) Spike Result Rec (%) CL RPD (%) RPD CL 240 296 99 75-125 120 137 90 75-125 Analytical Batch: MMS12361 Analytical Method: SW6020B Instrument: P7 Agilent 7800 Analyst: HGS Analytical Date/Time: 7/20/2024 1:19:OOPM Prep Batch: MXX36777 Prep Method: Soils/Solids Digest for Metals by ICP-MS Prep Date/Time: 7/12/2024 12:36:OOPM Prep Initial Wt./Vol.: 1.04g Prep Extract Vol: 50.00mL Print Date: 07/24/2024 3:09:32PM SGS North America Inc. 200 West Potter Drive Anchorage, AK 95518 t 907.562.2343 f 907.561.5301 www.us.sgs.com Member of SGS Group 20 of 32 SG9 Method Blank Blank ID: MB for HBN 1894659 [SPT/12089] Matrix: Soil/Solid (dry weight) Blank Lab ID: 1773398 QC for Samples: 1243423001, 1243423002, 1243423003, 1243423004 Results by SM21 2540G Parameter Results LOQ/CL DL LOD Units Total Solids 100 %a Batch Information Analytical Batch: SPT12089 Analytical Method: SM21 2540G Instrument: Analyst: DAT Analytical Date/Time: 7/10/2024 6:47:OOPM Print Date: 07/24/2024 3:09:34PM SGS North America Inc. 200 West Potter Drive Anchorage, AK 95518 t 907.562.2343 f 907.561.5301 www.us.sgs.com Member of SGS Group 21 of 32 SG$ r Duplicate Sample Summary Original Sample ID: 1243414009 Duplicate Sample ID: 1773405 QC for Samples: • Results by SM21 2540G NAME Total Solids riBatch Information Analytical Batch: SPT12089 Analytical Method: SM21 2540G Instrument: Analyst: DAT Original 95.1 Duplicate 95.8 Analysis Date: 07/10/2024 18:47 Matrix: Soil/Solid (dry weiqht) Units 0/0 RPD (%) 0.72 RPD CL (<15) Print Date: 07/24/2024 3:09:35PM SGS North America Inc. 200 West Potter Drive Anchorage, AK 95518 t 907.562.2343 f 907.561.5301 www.us.sgs.com Member of SGS Group 22 of 32 et,Duplicate Sample Summary Original Sample ID: 1243418004 Duplicate Sample ID: 1773406 QC for Samples: 1243423001, 1243423002, 1243423003, 1243423004 Results by SM21 2540G NAME Total Solids r- Batch Information Analytical Batch: SPT12089 Analytical Method: SM21 2540G Instrument: Analyst: DAT Original 95.9 Analysis Date: 07/10/2024 18:47 Matrix: Soil/Solid (dry weiqht) Duplicate Units 96.1 % RPD (%) 0.26 RPD CL (<15) Print Date: 07/24/2024 3:09:35PM SGS North America Inc. 200 West Potter Drive Anchorage, AK 95518 t 907.562.2343 f 907.561.5301 www.us.sgs.com Member of SGS Group 23 of 32 et,Duplicate Sample Summary Original Sample ID: 1243435006 Duplicate Sample ID: 1773407 QC for Samples: 1243423001, 1243423002, 1243423003, 1243423004 Results by SM21 2540G NAME Total Solids r- Batch Information Analytical Batch: SPT12089 Analytical Method: SM21 2540G Instrument: Analyst: DAT Original 91.7 Analysis Date: 07/10/2024 18:47 Matrix: Soil/Solid (dry weight) Duplicate Units 91.9 % RPD (%) 0.14 RPD CL (<15) Print Date: 07/24/2024 3:09:35PM SGS North America Inc. 200 West Potter Drive Anchorage, AK 95518 t 907.562.2343 f 907.561.5301 www.us.sgs.com Member of SGS Group 24 of 32 SG9 Method Blank Blank ID: MB for HBN 1895118 [VXX/41477] Matrix: Soil/Solid (dry weight) Blank Lab ID: 1774852 QC for Samples: 1243423001, 1243423002, 1243423003, 1243423004, 1243423005 Results by SW8260D Parameter Results LOQ/CL DL LOD Units 1,2,4-Trimethylbenzene 75.0U 100 30.0 75.0 ug/kg 1,2-Dibromoethane 1.13U 1.50 0.750 1.13 ug/kg 1,2-Dichloroethane 1.50U 2.00 0.700 1.50 ug/kg 1,3,5-Trimethylbenzene 18.8U 25.0 7.80 18.8 ug/kg Benzene 9.38U 12.5 3.90 9.38 ug/kg Cyclohexane 18.8U 25.0 7.80 18.8 ug/kg Ethylbenzene 18.8U 25.0 7.80 18.8 ug/kg Isopropylbenzene (Cumene) 18.8U 25.0 7.80 18.8 ug/kg Methyl-t-butyl ether 75.0U 100 31.0 75.0 ug/kg Naphthalene 18.8U 25.0 7.80 18.8 ug/kg n-Butylbenzene 18.8U 25.0 7.80 18.8 ug/kg n-hexane 18.8U 25.0 7.80 18.8 ug/kg n-Propylbenzene 18.8U 25.0 7.80 18.8 ug/kg o-Xylene 18.8U 25.0 7.80 18.8 ug/kg P & M -Xylene 37.5U 50.0 15.0 37.5 ug/kg sec-Butylbenzene 18.8U 25.0 7.80 18.8 ug/kg tert-Butylbenzene 18.8U 25.0 7.80 18.8 ug/kg Toluene 18.8U 25.0 7.80 18.8 ug/kg Xylenes (total) 56.3U 75.0 22.8 56.3 ug/kg Surrogates 1,2-Dichloroethane-D4 (surr) 102 71-136 0 4-Bromofluorobenzene (surr) 93.5 55-151 0 Toluene-d8 (surr) 98.3 85-116 0 % Batch Information Analytical Batch: VMS23417 Analytical Method: SW8260D Instrument: VQA 7890/5975 GC/MS Analyst: PHK Analytical Date/Time: 7/16/2024 12:08:OOAM Ok Prep Batch: VXX41477 Prep Method: SW5035A Prep Date/Time: 7/15/2024 6:00:OOAM Prep Initial Wt./Vol.: 50 g Prep Extract Vol: 25 mL Print Date: 07/24/2024 3:09:39PM SGS North America Inc. 200 West Potter Drive Anchorage, AK 95518 t 907.562.2343 f 907.561.5301 www.us.sgs.com Member of SGS Group 25 of 32 SGt Blank Spike Summary Blank Spike ID: LCS for HBN 1243423 [VXX41477] Blank Spike Lab ID: 1774853 Date Analyzed: 07/16/2024 00:24 Matrix: Soil/Solid (dry weight) QC for Samples: 1243423001, 1243423002, 1243423003, 1243423004, 1243423005 Results by SW8260D Parameter 1,2,4-Trimethylbenzene 1,2-Dibromoethane 1,2-Dichloroethane 1,3,5-Trimethylbenzene Benzene Cyclohexane Ethylbenzene Isopropylbenzene (Cumene) Methyl-t-butyl ether Naphthalene n-Butylbenzene n-hexane n-Propylbenzene o-Xylene P & M -Xylene sec-Butylbenzene tert-Butylbenzene Toluene Xylenes (total) Blank Spike (ug/kg) Spike Result Rec (%) 750 754 101 750 838 112 750 743 99 750 785 105 750 784 104 750 730 97 750 807 108 750 766 102 1130 1100 98 750 850 113 750 768 102 750 704 94 750 763 102 750 824 110 1500 1650 110 750 749 100 750 756 101 750 783 104 2250 2470 110 Surrogates 1,2-Dichloroethane-D4 (surr) 750 95 4-Bromofluorobenzene (surr) 750 96 Toluene-d8 (surr) 750 102 riBatch Information • ♦ Analytical Batch: VMS23417 Analytical Method: SW8260D Instrument: VQA 7890/5975 GC/MS Analyst: PHK CL ( 75-123 ) (78-122) (73-128) (73-124) ( 77-121 ) ( 70-130 ) ( 76-122 ) ( 68-134 ) (73-125) ( 62-129 ) (70-128) ( 70-130 ) (73-125) ( 77-123 ) (77-124) (73-126) (73-125) ( 77-121 ) (78-124) ( 71-136 ) ( 55-151 ) (85-116 ) l Prep Batch: VXX41477 Prep Method: SW5035A Prep Date/Time: 07/15/2024 06:00 Spike Init Wt./Vol.: 750 ug/kg Extract Vol: 25 mL Dupe Init Wt./Vol.: Extract Vol: Print Uate: U(/24/2U24 3:UV:42F'M SGS North America Inc. t 907.562.2343 f 907.561.5301 www.us.sgs.com 200 West Potter Drive Anchorage, AK 95518 Member of SGS Group 26 of 32 SG$ Matrix Spike Summary Original Sample ID: 1774854 MS Sample ID: 1774855 MS MSD Sample ID: 1774856 MSD QC for Samples: 1243423001, 1 `Results by SW8260D Analysis Date: Analysis Date: Analysis Date: Matrix: Solid/S 243423002, 1243423003, 1243423004, 1243423005 07/16/2024 3:32 07/16/2024 0:39 07/16/2024 0:55 oil (Wet Weight) - Matrix Spike (ug/kg) Spike Duplicate (ug/kg) Parameter Sample Spike Result Rec (%) Spike Result Rec (%) CL RPD (%) RPD CL 1,2,4-Trimethylbenzene 83.3U 828 821 99 828 819 99 75-123 0.22 (<20) 1,2-Dibromoethane 1.24U 828 889 107 828 864 104 78-122 3.00 (<20) 1,2-Dichloroethane 1.89J 828 802 97 828 793 96 73-128 1.10 (<20) 1,3,5-Trimethylbenzene 20.7U 828 867 105 828 866 104 73-124 0.18 (<20) Benzene 10.4U 828 870 105 828 861 104 77-121 1.00 (< 20 ) Ethylbenzene 20.7U 828 895 108 828 900 109 76-122 0.57 (< 20 ) Isopropylbenzene (Cumene) 20.7U 828 848 102 828 857 103 68-134 1.10 (< 20 ) Methyl-t-butyl ether 83.3U 1240 1320 106 1240 1150 93 73-125 13.20 (< 20 ) Naphthalene 20.7U 828 881 106 828 865 104 62-129 1.80 (< 20 ) n-Butylbenzene 20.7U 828 824 100 828 836 101 70-128 1.40 (< 20 ) n-Propylbenzene 20.7U 828 847 102 828 864 104 73-125 2.00 (< 20 ) o-Xylene 20.7U 828 895 108 828 902 109 77-123 0.79 (< 20 ) P & M -Xylene 41.5U 1660 1780 107 1660 1800 109 77-124 1.10 (< 20 ) sec-Butylbenzene 20.7U 828 831 100 828 853 103 73-126 2.50 (< 20 ) tert-Butylbenzene 20.7U 828 842 102 828 857 103 73-125 1.70 (< 20 ) Toluene 20.7U 828 868 105 828 835 101 77-121 3.90 (< 20 ) Xylenes (total) 62.2U 2490 2680 108 2490 2700 109 78-124 0.98 (< 20 ) Surrogates 1,2-Dichloroethane-D4 (surr) 4-Bromofluorobenzene (surr) Toluene-d8 (surr) 828 781 94 828 783 95 71-136 0.24 1280 89 7 * 1280 89.9 7 * 55-151 0.98 828 842 102 828 814 98 85-116 3.30 (- Batch Information 1 Analytical Batch: VMS23417 Analytical Method: SW8260D Instrument: VQA 7890/5975 GC/MS Analyst: PHK Analytical Date/Time: 7/16/2024 12:39:OOAM Prep Batch: VXX41477 Prep Method: Vol. Extraction SW8260 Field Extracted L Prep Date/Time: 7/15/2024 6:00:OOAM Prep Initial Wt./Vol.: 48.89g Prep Extract Vol: 27.02mL Print Date: 07/24/2024 3:09:44PM SGS North America Inc. 200 West Potter Drive Anchorage, AK 95518 t 907.562.2343 f 907.561.5301 www.us.sgs.com Member of SGS Group 27 of 32 SG9 Method Blank Blank ID: MB for HBN 1895001 [XXX/49829] Blank Lab ID: 1774259 QC for Samples: 1243423001, 1243423002, 1243423003, 1243423004 Results by AK102 Parameter Diesel Range Organics Surrogates 5a Androstane (surr) Results 15.0U 101 Batch Information j- Analytical Batch: XFC16955 Analytical Method: AK102 Instrument: Agilent 7890E F Analyst: T.L Analytical Date/Time: 7/17/2024 7:28:OOAM LOQ/CL 20.0 60-120 Matrix: Soil/Solid (dry weight) DL LOD 9.00 15.0 0 Units mg/kg Prep Batch: XXX49829 Prep Method: SW3550C Prep Date/Time: 7/16/2024 7:19:OOAM Prep Initial Wt./Vol.: 22.5 g Prep Extract Vol: 5 mL Print Date: 07/24/2024 3:09:46PM SGS North America Inc. 200 West Potter Drive Anchorage, AK 95518 t 907.562.2343 f 907.561.5301 www.us.sgs.com Member of SGS Group 28 of 32 SGt Blank Spike Summary Blank Spike ID: LCS for HBN 1243423 [XXX49829] Blank Spike Lab ID: 1774260 Date Analyzed: 07/17/2024 07:38 Spike Duplicate ID: LCSD for HBN 1243423 [XXX49829] Spike Duplicate Lab ID: 1774261 Matrix: Soil/Solid (dry weight) QC for Samples: 1243423001, 1243423002, 1243423003, 1243423004 Results by AK102 Blank Spike (mg/kg) Spike Duplicate (mg/kg) Parameter Spike Result Rec (%) Spike Result Rec (%) CL RPD (%) RPD CL Diesel Range Organics 1110 1310 118 1110 1190 107 (75-125) 9.50 (< 20 ) Surrogates 5a Androstane (surr) 22.2 Batch Information Analytical Batch: XFC16955 Analytical Method: AK102 Instrument: Agilent 7890B F Analyst: T.L ♦ 115 22.2 105 (60-120) 8.80 Prep Batch: XXX49829 Prep Method: SW3550C Prep Date/Time: 07/16/2024 07:19 Spike Init Wt./Vol.: 22.2 mg/kg Extract Vol: 5 mL Dupe Init Wt./Vol.: 22.2 mg/kg Extract Vol: 5 mL Print uate: U//24/2U24 :i:O 3:bOF'M SGS North America Inc. t 907.562.2343 f 907.561.5301 www.us.sgs.com 200 West Potter Drive Anchorage, AK 95518 Member of SGS Group 29 of 32 SGS North America Inc. CHAIN OF CUSTODY RECORD 1143423 SGS 200 Ancl 111 11 u D CLIENT: �� 0i / ref t .. � In G. v mt.; l =l(f ),�° M1 Instructions: Sections 9 - 5 must be filled out. Omissions may delay the onset of analysis. I CONTACT,:� m dd- ,5 ct , % „r L+K.t�1 PHONE #: 96q.3131, 03� Section 3 Preservative Page of f PROJECT NAME: Project/Permit Number: NPDL NumbDOD}: q C � //p///////// REPO TOE. raj I -0,`. 1. E-MAIL: 1-64462_,Icci AtotS CR1..t Cann. Sample Analysis" ys N T Type NOTE_ INVOICE TO: (n „ _ - . l „ V �y QJV Qt k4 j t LQ�[ df QUOTE #: P.O. #: A N E Comp Grab MI � �, � al, `^ The foliowin ana! ses re uire 8 Y q specific method andlor compound list: BTEX, Metals, PFAS Section 2 RESERVED for lab use SAMPLE IDENTIFICATION DATE mmlddfyy TIME HH:MM MATRIX! MATRIX CODE R s IQ } t REMARKS/LOC ID q 12 2/6552 6-0--17701.-.10 �6 Zy I. to OsiL, 2_ _ 2-02 V1(55W150-7 V 2•-01 16101 031, a 2 7C ) b-012 2.1r5swD56-1--Pc0z- fry (Zoo 56; L 2-K li 2q c� sS wD 5 6 - WC,31 , 1.635 50i4- Cow X 7C ?C comments: 'Yet TAT' r" -^ Vac r ✓f [old (�✓1/4. g/i�(�i - 4ied- 1I1"' __ "4gP 04 S EAS — S4 UV CrtCr 'V\ j p i CD to DOD Project? YES � 9around Time Requested SGS Sample Receipt (Lab Use Only' , Standar Rush Requested Rush Report Date: Data Delwera les Requested Ti oaitvery Method: bent Commercial Chain of C Seal Condition: DataView SEDD EQtl1S Level 4 ERPIMS Other: Did eachoo(er have a •yes INTACT BROKEN ABSENT correspondingCOC7 No COC Se on(s): ] !- Section 5 RELINQUISHED BY: DATE: TIME: RECEIVED BY: Cooler ID Temperature {°C} Therm. ID ff more than three coolers are received, or for documentation of non- compliant confers, use form FS-0029. 3/Zil / 2. � 0 C / /// � l •7 j LLLLLL !!1/ 17 j I lC �7`� Note: if temp, is outside 0-6° ands moles were not taken <8 hours ago OR are waste samples, Client or PM should initial here or attach an email change order to proceed with analysis. If ice is present. note on form F10213. lntldl5: Laboratory Use Only . http://www-sqs, com/Terms-and-conditions F083-Blank COC 20181228 30 of 32 sG$ SAMPLE RECEIPT FORM 1243423 iN iN Project Manager Completion Was all necessary information recorded on the COC upon receipt? (temperature, COC seals, etc.?) j4ee No N/A Was temperature between 0-6° C? es No N/A If "No", are the samples either exempt* or sampled <8 hours prior to receipt? Were all analyses received within holding time*? es No N/A Was a method specified for each analysis, where applicable? If no, please note correct methods. Xt?s) �/ No N/A Are compound lists specified, where applicable? For project specific or special compound lists please note correct analysis code. Yes No N/A If rush was requested by the client, was the requested TAT approved? Yes No 7 If "NO", what is the approved TAT? If SEDD Deliverables are required, were Location ID's and an NPDL Number provided? Yes No N/ if 'NO", contact client for information. aril' le Lc' in Completion Do ID's on sample containers match COC? rim No N/A If provided on containers, do dates/times collected match COC? - dr No N/A Note: If times differ <1 hr., record details below and login per COC. Were all sample containers received in good condition? — No N/A Were proper containers (type/mass/volume/preservative) received for all samples? *See form F-083 "Sample Guide" It No N/A Note: If 200.8/6020 Total Metals are received unpreserved, preserve and note HNO3 lot here: If200.8/6020 Dissolved Metals are received unpreserved, log in for LABFILTEFR and do not preserve. For all non-metals methods, inform Project Manager. Were Trip Blanks (VOC, GRO, Low -Level Hg, etc.) received with samples, where applicable*? Yes No N/A Were all VOA vials free of headspace >6mm? / G U 0146 No / Were all soil VOA samples received field extracted with Methanol? s No N/A Did all soil VOA samples have an accompanying unpreserved container for % solids? Yes No N/A If special handling is required, were containers labelled appropriately? e.g. MI/ISM, foreign soils, lab filter, Ref Lab, limited volume Yes No A For Rush/Short Holding time, was the lab notified? Yes No NI For any question answered "NO", was the Project Manager notified? Yes No A J �/ PM Initials: Was Peer Review of sample numbering/labelling completed? e No NIA Reviewer Initials: A r7S Additional Notes/Clarification where Applicable. including resolution of "No" answers when a change order is not attached: F102BSRF_10202022 31 of 32 SG$ Sample Containers and Preservatives Container Id Preservative Container Container Id Preservative Container Condition Condition 1243423001-A No Preservative Required OK 1243423001-B Methanol field pres. 4 C OK 1243423002-A No Preservative Required OK 1243423002-B Methanol field pres. 4 C OK 1243423003-A No Preservative Required OK 1243423003-B Methanol field pres. 4 C OK 1243423004-A No Preservative Required OK 1243423004-B Methanol field pres. 4 C OK 1243423005-A Methanol field pres. 4 C OK Container Condition Glossary Containers for bacteriological, low level mercury and VOA vials are not opened prior to analysis and will be assigned condition code OK unless evidence indicates than an inappropriate container was submitted. OK - The container was received at an acceptable pH for the analysis requested. BU - The container was received with headspace greater than 6mm. DM - The container was received damaged. FR - The container was received frozen and not usable for Bacteria or BOD analyses. IC - The container provided for microbiology analysis was not a laboratory -supplied, pre -sterilized container and therefore was not suitable for analysis. NC- The container provided was not preserved or was under -preserved. The method does not allow for additional preservative added after collection. PA - The container was received outside of the acceptable pH for the analysis requested. Preservative was added upon receipt and the container is now at the correct pH. See the Sample Receipt Form for details on the amount and lot # of the preservative added. PH - The container was received outside of the acceptable pH for the analysis requested. Preservative was added upon receipt, but was insufficient to bring the container to the correct pH for the analysis requested. See the Sample Receipt Form for details on the amount and lot # of the preservative added. QN - Insufficient sample quantity provided. 32 of 32 7/8/2024 SGS SGS Engage --- Sample Crosstab Job1243423 Client Sample ID: 24CSSWDSO-TP01-09 24CSSWDSO-TP02-09 24CSSWDSO-TP02-10 24CSSWDSO-WC01 24CSSWDSO-TB DescriptionCity of Seward Jesse Lee Lab Sample ID: 1243423001 1243423002 1243423003 1243423004 1243423005 Matrix: Soil/Solid (dry weight) Soil/Solid (dry weight) Soil/Solid (dry weight) Soil/Solid (dry weight) Soil/Solid (dry weight) Location: N/A N/A N/A N/A FieIdQC Sample Date: 7/3/2024 2:10 PM 7/3/2024 4:09 PM 7/3/2024 12:00 PM 7/3/2024 4:35 PM 7/3/2024 12:00 PM AK102 Diesel Range Organics mg/kg 250 778 1840 1260 1650 SM21 2540G Total Solids % 91.4 92.6 92.7 90.8 SW6020B Arsenic mg/kg 0.2 9.46 SW6020B Barium mg/kg 2100 35.8 SW6020B Cadmium mg/kg 9.1 0.201 U SW6020B Chromium mg/kg 32.4 SW6020B Lead mg/kg 12.7 SW6020B Mercury mg/kg 0.36 0.201 U SW6020B Selenium mg/kg 6.9 2.01 U SW6020B Silver mg/kg 11 0.502 U SW8260D 1,2,4-Trimethylbenzene ug/kg 610 129 U 122 U 118 U 115 U 100 U SW8260D 1,2-Dibromoethane ug/kg 0.24 1.94 U 1.82 U 1.76 U 1.72 U 1.50 U SW8260D 1,2-Dichloroethane ug/kg 5.5 2.59 U 2.43 U 2.35 U 2.30 U 2.00 U SW8260D 1,3,5-Trimethylbenzene ug/kg 660 32.3 U 44.3 29.4 U 28.7 U 25.0 U SW8260D Benzene ug/kg 22 16.2 U 15.2 U 14.7 U 14.4 U 12.5 U SW8260D Cyclohexane ug/kg 150000 32.3 U 30.4 U 29.4 U 28.7 U 25.0 U SW8260D Ethylbenzene ug/kg 130 32.3 U 30.4 U 29.4 U 28.7 U 25.0 U SW8260D Isopropylbenzene (Cumene) ug/kg 5600 32.3 U 30.4 U 29.4 U 28.7 U 25.0 U SW8260D Methyl-t-butyl ether ug/kg 400 129 U 122 U 118 U 115 U 100 U SW8260D n-Butylbenzene ug/kg 23000 32.3 U 30.4 U 29.4 U 28.7 U 25.0 U SW8260D n-hexane ug/kg 130000 32.3 U 30.4 U 29.4 U 28.7 U 25.0 U SW8260D n-Propylbenzene ug/kg 9100 32.3 U 30.4 U 29.4 U 28.7 U 25.0 U SW8260D Naphthalene ug/kg 38 32.3 U 174 71.3 57.8 25.0 U SW8260D o-Xylene ug/kg 32.3 U 30.4 U 29.4 U 28.7 U 25.0 U SW8260D P & M -Xylene ug/kg 64.7 U 60.8 U 58.8 U 57.4 U 50.0 U SW8260D sec-Butylbenzene ug/kg 42000 32.3 U 30.4 U 29.4 U 28.7 U 25.0 U SW8260D tert-Butylbenzene ug/kg 11000 32.3 U 30.4 U 29.4 U 28.7 U 25.0 U SW8260D Toluene ug/kg 6700 32.3 U 30.4 U 29.4 U 28.7 U 25.0 U SW8260D Xylenes (total) ug/kg 1500 97.0 U 91.2 U 88.2 U 86.1 U 75.0 U Appendix D ADEC Laboratory Data Review Checklist ADEC Contaminated Sites Program Laboratory Data Review Checklist Completed By: Title: Consulting Firm: Birgit Hagedorn Senior Chemist CS Site Name: ADEC File No.: Sustainable Earth Hazard ID Research No.: LLC City of Seward Jesse Lee 2332.38.054 27559 SGS North Lab Name: America Inc.Alaska Lab Report No.: 1243423 Lab Report 7/24/2024 Date: Note: Any N/A or No box checked must have an explanation in the comments box. 1. Laboratory a. Did an ADEC Contaminated Sites Laboratory Approval Program (CS -LAP) approved laboratory receive and perform all of the submitted sample analyses? Yes o No ❑ N/A ❑ Comments: Click or tap here to enter text. b. If the samples were transferred to another "network" laboratory or sub -contracted to an alternate laboratory, was the laboratory performing the analyses CS -LAP approved? Yes ❑ No ❑ N/A ❑ Comments: Click or tap here to enter text. 2. Chain of Custody (CoC) a. Is the CoC information completed, signed, and dated (including released/received by)? Yes o No ❑ N/A ❑ Comments: Click or tap here to enter text. b. Were the correct analyses requested? Yes o No ❑ N/A ❑ Analyses requested: AK102 DRO, 8260D VOCs petroleum only, 6020B RCRA Metals Comments: Click or tap here to enter text. 3. Laboratory Sample Receipt Documentation a. Is the sample/cooler temperature documented and within range at receipt (0° to 6° C)? Yes o No ❑ N/A ❑ Cooler temperature(s): 2.3 ° C 1 Revision 9/2022 CS Site Name: City of Seward Jesse Lee Lab Report No.: 1243423 Sample temperature(s): Click or tap here to enter text. Comments: Click or tap here to enter text. b. Is the sample preservation acceptable — acidified waters, methanol preserved soil (GRO, BTEX, VOCs, etc.)? Yes o No ❑ N/A ❑ Comments: Click or tap here to enter text. c. Is the sample condition documented — broken, leaking, zero headspace (VOA vials); canister vacuum/pressure checked and no open valves, etc.? Yes o No ❑ N/A ❑ Comments: Nothing to report d. If there were any discrepancies, were they documented? For example, incorrect sample containers/preservation, sample temperature outside of acceptable range, insufficient or missing samples, canister not holding a vacuum, etc.? Yes o No ❑ N/A ❑ Comments: Nothing to report e. Is the data quality or usability affected? Yes ❑ No ❑ N/A ❑ Comments: Click or tap here to enter text. 4. Case Narrative a. Is the case narrative present and understandable? Yes o No ❑ N/A ❑ Comments: Click or tap here to enter text. b. Are there discrepancies, errors, or QC failures identified by the lab? Yes o No ❑ N/A ❑ Comments: 8260D: Surrogate 4-BFB recovery for non-workorder specific MS/MSD were outside QC limits. 6020B: MS/MSD recovery for several analytes was outside QC limits. c. Were all the corrective actions documented? Yes o No ❑ N/A ❑ Comments: 8260D VOCs: samples were analyzed three times and PS/MS/MSD results confirmed. d. What is the effect on data quality/usability according to the case narrative? Comments: No effect on data usability. 6020B: Post digestion spike recovery was within QC limits data usability is not affected. 2 CS Site Name: City of Seward Jesse Lee Lab Report No.: 1243423 5. Sample Results a. Are the correct analyses performed/reported as requested on CoC? Yes o No ❑ N/A ❑ Comments: Click or tap here to enter text. b. Are all applicable holding times met? Yes o No ❑ N/A ❑ Comments: Click or tap here to enter text. c. Are all soils reported on a dry weight basis? Yes o No ❑ N/A ❑ Comments: Click or tap here to enter text. d. Are the reported limits of quantitation (LoQ) or limits of detections (LOD), or reporting limits (RL) less than the Cleanup Level or the action level for the project? Yes ❑ No o N/A ❑ Comments: 8260D VOCs: 1,2 Dibromoethane had LOQs above cleanup level in all samples including trip blank. e. Is the data quality or usability affected? Yes L No ❑ N/A ❑ Comments: Analyte cannot be evaluated for project goals. 6. QC Samples a. Method Blank i. Was one method blank reported per matrix, analysis, and 20 samples? Yes L No ❑ N/A ❑ Comments: Click or tap here to enter text. ii. Are all method blank results less than LOQ (or RL)? Yes Li No Comments: Click or tap here to enter text. iii. If above LoQ or RL, what samples are affected? Comments: Click or tap here to enter text. iv. Do the affected sample(s) have data flags? If so, are the data flags clearly defined? Yes ❑ No ❑ N/A ❑ Comments: Click or tap here to enter text. v. Data quality or usability affected? 3 CS Site Name: City of Seward Jesse Lee Lab Report No.: 1243423 Yes ❑ No ❑ N/A ❑ Comments: Click or tap here to enter text. b. Laboratory Control Sample/Duplicate (LCS/LCSD) i. Organics — Are one LCS/LCSD reported per matrix, analysis and 20 samples? (LCS/LCSD required per AK methods, LCS required per SW846) Yes o No ❑ N/A ❑ Comments: Click or tap here to enter text. ii. Metals/Inorganics — Are one LCS and one sample duplicate reported per matrix, analysis and 20 samples? Yes o No ❑ N/A ❑ Comments: Click or tap here to enter text. iii. Accuracy — Are all percent recoveries (%R) reported and within method or laboratory limits and project specified objectives, if applicable? (AK Petroleum methods: AK101 60%-120%, AK102 75%-125%, AK103 60%-120%; all other analyses see the laboratory QC pages) Yes o No ❑ N/A ❑ Comments: Click or tap here to enter text. iv. Precision — Are all relative percent differences (RPD) reported and less than method or laboratory limits and project specified objectives, if applicable? Was the RPD reported from LCS/LCSD, and or sample/sample duplicate? (AK Petroleum methods 20%; all other analyses see the laboratory QC pages) Yes o No ❑ N/A ❑ Comments: Precision was only analyzed for AK methods with LCS/ LCSD. For all other methods precision was analyzed using MS/MSD. v. If %R or RPD is outside of acceptable limits, what samples are affected? Comments: Click or tap here to enter text. vi. Do the affected sample(s) have data flags? If so, are the data flags clearly defined? Yes ❑ No ❑ N/A ❑ Comments: Click or tap here to enter text. vii. Is the data quality or usability affected? Yes ❑ No ❑ N/A ❑ Comments: Click or tap here to enter text. 4 CS Site Name: City of Seward Jesse Lee Lab Report No.: 1243423 c. Matrix Spike/Matrix Spike Duplicate (MS/MSD) i. Organics — Are one MS/MSD reported per matrix, analysis and 20 samples? Yes o No ❑ N/A ❑ Comments: MS/MSD was not required for this workorder but the lab analyzed MSD for non -AK method to document precision ii. Metals/Inorganics — Are one MS/MSD reported per matrix, analysis and 20 samples? Yes o No ❑ N/A ❑ Comments: Click or tap here to enter text. iii. Accuracy — Are all percent recoveries (%R) reported and within method or laboratory limits and project specified objectives, if applicable? Yes ❑ No o N/A ❑ Comments: 6020B: recovery for Barium and Chromium were below QC limits. iv. Precision — Are all relative percent differences (RPD) reported and less than method or laboratory limits and project specified objectives, if applicable? RPD reported from MS/MSD, and or sample/sample duplicate. Yes ❑ No ❑ N/A ❑ Comments: Click or tap here to enter text. v. If %R or RPD is outside of acceptable limits, what samples are affected? Comments: 6020B: sample 24CSSWDSO-WC01. vi. Do the affected sample(s) have data flags? If so, are the data flags clearly defined? Yes ❑ No o N/A ❑ Comments: Refer to post extraction blank for recovery. vii. Is the data quality or usability affected? Yes ❑ No o N/A ❑ Comments: See above. d. Surrogates — Organics Only or Isotope Dilution Analytes (IDA) — Isotope Dilution Methods Only i. Are surrogate/IDA recoveries reported for organic analyses — field, QC, and laboratory samples? Yes o No ❑ N/A ❑ Comments: Click or tap here to enter text. 5 CS Site Name: City of Seward Jesse Lee Lab Report No.: 1243423 ii. Accuracy — Are all percent recoveries (%R) reported and within method or laboratory limits and project specified objectives, if applicable? (AK Petroleum methods 50-150 %R for field samples and 60-120 %R for QC samples; all other analyses see the laboratory report pages) Yes ❑ No o N/A ❑ Comments: 8260D VOCs: Surrogate 4-BFB recovery was below QC limits and below 10%. iii. Do the sample results with failed surrogate/IDA recoveries have data flags? If so, are the data flags clearly defined? Yes ❑ No o N/A ❑ Comments: This is a non-workorder specific MS/MSD sample. 4-BFB recovery was within QC limits for all associated samples. iv. Is the data quality or usability affected? Yes ❑ No o N/A ❑ Comments: See above e. Trip Blanks i. Is one trip blank reported per matrix, analysis, and for each cooler containing volatile samples? Yes o No ❑ N/A ❑ Comments: Click or tap here to enter text. ii. Are all results less than LoQ or RL? Yes o No ❑ N/A ❑ Comments: Click or tap here to enter text. iii. If above LoQ or RL, what samples are affected? Comments: Click or tap here to enter text. iv. Is the data quality or usability affected? Yes ❑ No ❑ N/A ❑ Comments: Click or tap here to enter text. f. Field Duplicate i. Are one field duplicate submitted per matrix, analysis, and 10 project samples? Yes o No ❑ N/A ❑ Comments: Click or tap here to enter text. ii. Was the duplicate submitted blind to lab? Yes o No ❑ N/A ❑ Comments: Sample 24CSSWDSO-TP02-10 is duplicate to 24CSSWDSO-TP02-09. 6 CS Site Name: City of Seward Jesse Lee Lab Report No.: 1243423 g. iii. Precision — All relative percent differences (RPD) less than specified project objectives? (Recommended: 30% water or air, 50% soil) RPD (%) — X 100 Where R1 = Sample Concentration R2 = Field Duplicate Concentration Is the data quality or usability affected? (Explain) Yes ❑ No o N/A ❑ Comments: 8260D: Naphthalene had RPD above 50%. iv. Is the data quality or usability affected? (Explain) Yes ❑ No o N/A ❑ Comments: Both samples had concentration above cleanup level. The higher values should be used for decision making. Decontamination or Equipment Blanks i. Were decontamination or equipment blanks collected? Yes ❑ No o N/A ❑ Comments: Not required for this workorder. ii. Are all results less than LoQ or RL? Yes ❑ No ❑ N/A ❑ Comments: Click or tap here to enter text. iii. If above LoQ or RL, specify what samples are affected. Comments: Click or tap here to enter text. iv. Are data quality or usability affected? Yes ❑ No ❑ N/A ❑ Comments: Click or tap here to enter text. 7. Other Data Flags/Qualifiers (ACOE, AFCEE, Lab Specific, etc.) a. Are they defined and appropriate? Yes ❑ No o N/A ❑ Comments: No additional flagging was used by the laboratory. 7 Job1243423 Client Sample ID: 24CSSWDSO-TP01-09 24CSSWDSO-TP02-09 24CSSWDSO-TP02-10 24CSSWDSO-WC01 24CSSWDSO-TB DescriptionCity of Seward Jesse Lee Lab Sample ID: 1243423001 1243423002 1243423003 1243423004 1243423005 Matrix: Soil/Solid (dry weight) Soil/Solid (dry weight) Soil/Solid (dry weight) Soil/Solid (dry weight) Soil/Solid (dry weight) Location: Primary to 24CSSWDSO-TP02-10 Duplicate to 24CSSWDSO-TP02-09 N/A FieIdQC Sample Date: 7/3/2024 2:10 PM 7/3/2024 4:09 PM 7/3/2024 12:00 PM 7/3/2024 4:35 PM 7/3/2024 12:00 PM Analysis Analyte Unit 18AAC75MigGW > Level Qualifier Level Qualifier Level Qualifier Level Qualifier Level Qualifier SM21 2540G Total Solids % 91.4 92.6 92.7 90.8 AK102 Diesel Range Organics mg/kg 250 1840 1260 SW6020B Arsenic mg/kg 0.2 SW6020B Barium mg/kg 2100 35.8 SW6020B Cadmium mg/kg 9.1 ND (0.201) SW6020B Chromium mg/kg 32.4 SW6020B Lead mg/kg 400 12.7 SW6020B Mercury mg/kg 0.36 ND (0.201) SW6020B Selenium mg/kg 6.9 ND (2.01) SW6020B Silver mg/kg 11 ND (0.502) SW8260D 1,2,4-Trimethylbenzene ug/kg 610 ND (129) ND (122) ND (118) ND (115) ND (100) SW8260D 1,2-Dibromoethane ug/kg 0.24 ND (1.94) ND (1.82) ND (1.76) ND (1.72) ND (1.50) SW8260D 1,2-Dichloroethane ug/kg 5.5 ND (2.59) ND (2.43) ND (2.35) ND (2.30) ND (2.00) SW8260D 1,3,5-Trimethylbenzene ug/kg 660 ND (32.3) 44.3 ND (29.4) ND (28.7) ND (25.0) SW8260D Benzene ug/kg 22 ND (16.2) ND (15.2) ND (14.7) ND (14.4) ND (12.5) SW8260D Cyclohexane ug/kg 150000 ND (32.3) ND (30.4) ND (29.4) ND (28.7) ND (25.0) SW8260D Ethylbenzene ug/kg 130 ND (32.3) ND (30.4) ND (29.4) ND (28.7) ND (25.0) SW8260D Isopropylbenzene (Cumene) ug/kg 5600 ND (32.3) ND (30.4) ND (29.4) ND (28.7) ND (25.0) SW8260D Methyl-t-butyl ether ug/kg 400 ND (129) ND (122) ND (118) ND (115) ND (100) SW8260D n-Butylbenzene ug/kg 23000 ND (32.3) ND (30.4) ND (29.4) ND (28.7) ND (25.0) SW8260D n-hexane ug/kg 130000 ND (32.3) ND (30.4) ND (29.4) ND (28.7) ND (25.0) SW8260D n-Propylbenzene ug/kg 9100 ND (32.3) ND (30.4) ND (29.4) ND (28.7) ND (25.0) SW8260D Naphthalene ug/kg 38 ND (32.3) QN QN 57.8 ND (25.0) SW8260D o-Xylene ug/kg ND (32.3) ND (30.4) ND (29.4) ND (28.7) ND (25.0) SW8260D P & M -Xylene ug/kg ND (64.7) ND (60.8) ND (58.8) ND (57.4) ND (50.0) SW8260D sec-Butylbenzene ug/kg 42000 ND (32.3) ND (30.4) ND (29.4) ND (28.7) ND (25.0) SW8260D tert-Butylbenzene ug/kg 11000 ND (32.3) ND (30.4) ND (29.4) ND (28.7) ND (25.0) SW8260D Toluene ug/kg 6700 ND (32.3) ND (30.4) ND (29.4) ND (28.7) ND (25.0) SW8260D Xylenes (total) ug/kg 1500 ND (97.0) ND (91.2) ND (88.2) ND (86.1) ND (75.0)