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Site Report: Eielson AFB Basewide (AKA Sitewide) PFAS

Site Name: Eielson AFB Basewide (AKA Sitewide) PFAS
Address: Eielson Air Force Base, Eielson AFB, AK 99702
File Number: 107.38.150
Hazard ID: 26773
Status: Informational
Staff: IC Unit, 9074655229 dec.icunit@alaska.gov
Latitude: 64.675709
Longitude: -147.091318
Horizontal Datum:WGS84

We make every effort to ensure the data presented here is accurate based on the best available information currently on file with DEC. It is therefore subject to change as new information becomes available. We recommend contacting the assigned project staff prior to making decisions based on this information.

Problems/Comments

This database record includes general information about per- and polyfluoroalkyl substances (PFAS) contamination at Eielson Air Force Base (EAFB)and Moose Creek. PFAS are a diverse group of compounds that have been used in many industrial applications and consumer products including fire-fighting foams. Ongoing investigations are gathering information to determine the location of PFAS-contaminated sites on EAFB. Upon completion of the investigations, specific areas may be assigned individual Hazard IDs and tracked separately. Please see site-specific database entries to learn more about an individual EAFB PFAS-contaminated site. Update 2019 This database record will continue to provide updated Action entries regarding the Moose Creek Interim Record of Decision (IROD) and Air Force remedies to address PFAS related groundwater impacts. 24309915103: Spill of 5 gallons of PFAS containing IDW water released at the PFAS Wastewater Treatment. Will be tracked under CS.

Action Information

Action Date Action Description DEC Staff
8/16/2017 Spill Transferred from Prevention Preparedness and Response Program Spill transferred by PPRP staff Jill Stockbridge. Spill no. 17309919801; spill date = 7/17/17; substance = aqueous film forming foam (AFFF) concentrate; quantity = 5 gallons (4.5 gallons recovered); coordinates = 64.670105,-147.094116, WGS84; PPRP file number = 107.02.004. Description: A release of fire fighting foam concentrate occurred while performing maintenance on a fire suppression system at Eielson Air Force Base Building 1176. The 0.5 gallon that was not recovered was released into the sanitary sewer which leads to the wastewater treatment plant pond. Mitzi Read
8/22/2017 Update or Other Action DEC reviewed and provided comments on the Draft Site Inspection Report for Aqueous Film Forming Foam Areas, Eielson Air Force Base, Alaska (June, 2017). The 15 AFFF areas inspected were: Air National Guard (ANG) Hangar (Building 1171) • ANG KC-135 Hangar (Building 1176) • Corrosion Control (Building 1348) • Current Fire Training Area (FTA) (FT009) and Former Base Landfill (LF003) Fire Station 1 (Building 1206) • Former Adak Building Fire • Former Fire Station 1 • Former FTA near Antenna Farm (FT092) • Former FTAs by Current Entomology Building (Building 4335) • Fuel Pump House (Building 1246) • Garrison Slough • Hangar (Building 1344) • Power Plant Cooling Pond • Thunderdome (Building 1140) • Wastewater Treatment Plant (WWTP) and Biosolids Land Spreading Area John O'Brien
9/1/2017 Site Added to Database A new site has been added to the database Mitzi Read
10/26/2017 Update or Other Action DEC approved the Final Addendum #5 to the Final Perfluorinated Compounds Investigations Work Plan, Eielson Air Force Base, Alaska, Perfluorinated Compounds Moose Creek Area Drinking Water Sampling, Surface Water and Sediment Sampling at Eielson Air Force Base, Alaska. The WP outlines the objectives, methodology, and quality assurance (QA) and quality control (QC) procedures for the surface water and sediment investigation to be performed as part of the Moose Creek Area Drinking Water Sampling, Analysis, and Treatment project supporting EAFB. The purpose of the investigation is to determine the concentrations of the perfluoroalkyl substances (PFAS) perfluorooctanoic acid (PFOA) and perfluoro-octanesulfonate (PFOS) in surface water bodies and in sediment at Eielson AFB and selected offsite locations. The PFAS concentrations in sediment and surface water will be used to coordinate and/or guide future surface water, sediment, and fish tissue sampling. John O'Brien
8/28/2018 Site Visit Site visit to the Eielson AFB to view current status of work in F-35 construction area, visit power plant, Garrison Slough pond, Garrison slough, and the fish gate. Also visited stockpile areas for PFAS contaminated soil. Dennis Shepard
8/29/2018 Meeting or Teleconference Held A remedial project manager (RPM) meeting was held and the main topic was a SS062/SS067 Garrison Slough Risk Assessment (RA) Scoping Session. DEC, EPA and AFCEC risk assessors discussed contractor presented approach to the Risk assessment. Concerns over the proposed exposure areas were raised by the risk assessors present. Dennis Shepard
9/13/2018 Update or Other Action DEC Technical Memorandum for Action Levels for PFAS in Water and Guidance on Sampling Groundwater and Drinking Water, dated August 20, 2018, issued with notification letter to AFCEC regarding all Eielson/Moose Creek PFAS sites. The tech memo establishes drinking water for six PFAS compounds when detected in groundwater or surface water used for drinking water: PFOS, PFOA, PFNA, PFHxS, PFHpA, and PFBS and requests that all future sampling results for PFAS-impacted groundwater, surface water, and pore water include results for all six UCMR3 PFAS compounds. Bri Clark
9/24/2018 Meeting or Teleconference Held A remedial project manager (RPM) meeting was held and the main topic was the SS062/SS067 Garrison Slough Risk Assessment (RA) Scoping Session. DEC, EPA and AFCEC risk assessors discussed contractor presented data quality objectives for the Risk assessment. Concerns over the proposed sampling of soils sediments, surface waters and biota were raised by the risk assessors present. Dennis Shepard
9/27/2018 Update or Other Action DEC issued a letter to the USAF regarding the use and discharge of PFAS contaminated groundwater originating from Eielson Air Force Base. The letter expressed concern about untreated water being discharged into septic systems or to the ground surface via outdoor spigots. The letter stipulates that all water be treated or provided to prevent discharge of PFAS contaminated water and requested a plan and schedule to do so by October 25, 2018. Bri Clark
9/27/2018 Update or Other Action The USAF issued a response to DEC regarding the technical memorandum for PFAS compounds. The USAF stated that it follows the federal Comprehensive Environmental Response, Compensation and Liability Act (CERCLA) process in investigations and response actions. They sited PFOS and PFOA as having promulgated cleanup levels under the State's formal rule-making process and as such, they are the two PFAS compounds evaluated as potential applicable or relevant and appropriate requirements (ARARs) on a site-specific basis. The USAF stated, as the additional four PFAS compounds listed in the PFAS tech memo are not promulgated at this time, they do not meet the CERCLA definition of an ARAR. Bri Clark
10/2/2018 CERCLA ROD Periodic Review DEC provided comments on the Draft Interim Record of Decision for Community of Moose Creek, Alaska, Long-Term Water Supply, Eielson Air Force Base, Alaska, dated August 2018. This document summarizes the assessment of the groundwater in Moose Creek as related to PFOS and PFOA contamination and discusses interim and final remedies. Bri Clark
10/4/2018 Update or Other Action The Air Force PBR contractor provided meeting minutes from the August 29, 2018 Scoping meeting for Garrison Slough (SS062 AND SS067) Human Health and Ecological Risk Assessment. The minutes were submitted for review and comment by the regulatory agencies in order to document concerns for the risk assessment approach. Dennis Shepard
10/9/2018 Document, Report, or Work plan Review - other The Air Force PBR contractor provided meeting minutes from the September 24, 2018 Scoping meeting for Garrison Slough (SS062 AND SS067) Human Health and Ecological Risk Assessment. The minutes were submitted for review and comment by the regulatory agencies in order to document concerns for the risk assessment data quality objectives. Dennis Shepard
10/30/2018 Meeting or Teleconference Held A two day remedial project manager (RPM) meeting was held on October 29 and 30, 2018. Topics of discussion included Garrison Slough RI/FS and Risk Assessment Scoping. The status of PFAS treatability testing was also discussed and a new treatability study was proposed for soil washing of PFAS contaminated soil. Dennis Shepard
2/6/2019 CERCLA ROD Periodic Review DEC issued comments on the Draft Final Interim Record of Decision for Community of Moose Creek, Alaska, Long-Term Water Supply, Eielson Air Force Base, Alaska, dated August 2018. Bri Clark
4/3/2019 Meeting or Teleconference Held A meeting was held amongst remedial project managers (RPMs) to resolve outstanding comments for the Draft Final Interim Record of Decision for Community of Moose Creek, Alaska, Long-Term Water Supply, Eielson Air Force Base, Alaska, dated August 2018. Bri Clark
4/3/2019 Public Notice On April 3, 2019, the Alaska Department of Fish and Game (ADF&G) issued emergency order No. 3-R-U-01-19 closing sport fishing at Polaris Lake on Eielson AFB. The Emergency order is in response to concentrations of per and poly fluorinated alkyl substances (PFAS)identified above the EPA lifetime health advisory level of 70 parts per trillion. Dennis Shepard
4/12/2019 Update or Other Action A letter was sent to the U.S. Air Force regarding the language in the Moose Creek IROD describing modification/termination of LUCs. DEC requested the Air Force take immediate action to revise, or make exceptions to, its “Air Force Land Use Control Checklist for Active-Duty Bases on the NPL” to include language that allows the checklist user to require state concurrence for the modification/termination of LUCs when appropriate due to state law, existing federal facilities agreements, or other compliance agreements. Dennis Shepard
5/22/2019 Document, Report, or Work plan Review - other DEC provided comments on a Draft Expanded PFOA and PFOS Site Inspection at Eielson Air Force Base and Moose Creek, Alaska, Uniform Federal Policy-Quality Assurance Project Plan Work Plan, Eielson Air Force Base, Alaska, May 2019. The plan includes installation of 24 monitoring well, groundwater sampling and stepout borings to identify monitoring well locations. Dennis Shepard
6/4/2019 Update or Other Action DEC sent a letter request for surface water sampling to be included in the Expanded Perfluorooctanoic Acid (PFOA) and Perfluorooctanesulfonic Acid (PFOS) Site Inspection at Eielson Air Force Base and Moose Creek, Alaska. DEC is requesting surface water sampling of the lakes, streams, creeks, sloughs and ponds that are adjacent to and within the Eielson AFB-Moose Creek PFAS plume. Dennis Shepard
6/12/2019 CERCLA ROD Approved On June 11, 2019, the Air Force Civil Engineer Center provided a signed Final Interim Record of Decision for Community of Moose Creek, Alaska, Long-Term Water Supply, Eielson Air Force Base, Alaska. The Interim Action is undertaken to address perfluorooctanoic acid (PFOA) and perfluorooctane sulfonate (PFOS) impacted groundwater with concentrations exceeding the EPA’s 2016 lifetime drinking water health advisory. The Interim Record of Decision (I-ROD) presents the selected interim remedy for the community of Moose Creek, Alaska. This interim action is limited in scope and addresses only provision of an alternative drinking water supply to the community of Moose Creek. Remediation of the contaminated groundwater will also be addressed in a Final Record of Decision (ROD). The selected interim action is required to protect human health in the short-term while a final remedial solution is being developed. This I-ROD will be followed by a Final ROD. Dennis Shepard
9/20/2019 Document, Report, or Work plan Review - other U.S. EPA and DEC provided Joint Approval of the Expanded PFOA and PFOS Site Inspection at Eielson Air Force Base (AFB)and Moose Creek UFP QAPP WP (September 2019). The work plan objective is to laterally and vertically delineate PFOA and PFOS contamination in groundwater on Eielson AFB and in the adjacent community of Moose Creek. Activities include Sampling of existing groundwater monitoring wells on Eielson AFB, the perimeter of Eielson AFB, within the Chena River Flood Control Project, and in the area of Moose Creek, AK. Installation and sampling of temporary wells around the perimeter of Eielson AFB, within the Chena River Flood Control Project, and in Moose Creek, AK. Installation and sampling of step out soil borings to delineate soil above ADEC Human Health Cleanup Level and EPA Risk Based Screening Level exceedances of PFOA and/or PFOS. Dennis Shepard
9/20/2019 CERCLA SI The U.S. Environmental Protection Agency (EPA) and Alaska Department of Environmental Conservation (DEC)jointly approved the Expanded Perfluorooctanoic Acid (PFOA) and Perfluorooctanesulfonic Acid (PFOS) Site Inspection at Eielson Air Force Base and Moose Creek Uniform Federal Policy-Quality Assurance Project Plan Work Plan (September 2019). Soil and groundwater delineation activities for PFOS and PFOA on Eielson AFB and in the areas in and around Moose Creek, Alaska will be undertaken.. Dennis Shepard
10/15/2019 Offsite Soil or Groundwater Disposal Approved 480 cubic yards of soil containing PFOS, PFOA, and Chromium (VI) generated from the EIE406 Arctic Utilidors Phases B&C construction project was transferred to US Ecology in Grand View, Idaho. Sara Marshall
10/16/2019 Offsite Soil or Groundwater Disposal Approved 6 cubic yards of soil containing PFOS generated from the EIE423 Nose Dock construction project was transferred to OIT in Moose Creek, Ak for thermal remediation. Sara Marshall
10/21/2019 Offsite Soil or Groundwater Disposal Approved 156.7 cubic yards of soil containing PFOS, Trichloroethane, and cis-1,3-Dichloropropene generated from the EIE385 construction project was transferred to the Columbia Ridge Landfill in Arlington, Oregon for disposal. Sara Marshall
10/21/2019 Offsite Soil or Groundwater Disposal Approved 367 cubic yards of soil containing cis-1,3-Dichloropropene and hexachlorobutadiene generated from the EIE385 construction project was transferred to the Columbia Ridge Landfill in Arlington, Oregon for disposal. Sara Marshall
10/21/2019 Offsite Soil or Groundwater Disposal Approved 20 cubic yards of soil containing Trichloroethene and PFOS generated from the EIE405 construction project was transferred to the Columbia Ridge Landfill in Arlington, Oregon for disposal. Sara Marshall
10/21/2019 Offsite Soil or Groundwater Disposal Approved 40 cubic yards of soil containing 1,2,3-Trichloropropane (TCP) and PFOS generated from the EIE405 construction project was transferred to the Columbia Ridge Landfill in Arlington, Oregon for disposal. Sara Marshall
11/12/2019 Offsite Soil or Groundwater Disposal Approved 300 cubic yards of soil containing Naphthalene generated from the EIE405 construction project was transferred to OIT in Moose Creek, Ak for thermal remediation Sara Marshall
11/13/2019 Offsite Soil or Groundwater Disposal Approved 235.4 cubic yards of soil containing PFOS, 1,1,2,2-Tetrachloroethane , 1,1,2-Tricholorethane, 1,2-Dibromoethane, 1,2-Dichloroethane, bromodichloromethane, chloroform, dibromochloromethane, TCE, vinyl chloride, 1,2,3-trichlorobenzene, carbon tetrachloride generated from the EIE385 construction project was transferred to the Columbia Ridge Landfill in Arlington, Oregon for disposal. Sara Marshall
11/25/2019 Document, Report, or Work plan Review - other The Alaska Department of Environmental Conservation (DEC) provided review comments for the Eielson Surface Water and Sediment Sampling Addendum to the Work Plan for Expanded PFOA and PFOS Site Investigation, Eielson AFB, Alaska. The work plan addendum was prepared by Sundance-EA II, LLC (Sundance-EA) to define the objectives, methodology, and the quality assurance (QA) and quality control (QC) procedures for an investigation of PFOA and PFOS in surface water and sediment at Eielson Air Force Base (AFB), and at Bathing Beauty Lake within the community of Moose Creek. The PFOA and PFOS concentrations in sediment and surface water will be used to coordinate and/or guide future surface water and sediment sampling. Dennis Shepard
11/25/2019 Document, Report, or Work plan Review - other Alaska Department of Environmental Conservation (DEC)provided comments for the Draft Birch Lake Surface Water, Sediment, and Soil Sampling Addendum to the Work Plan for Expanded Perfluorooctanoic Acid (PFOA) and Perfluorooctane Sulfonate (PFOS) Site Investigation, Eielson Air Force Base (AFB), Alaska. The purpose of the investigation is to determine the concentrations PFOA and PFOS in surface water and sediment from Birch Lake, and in soil from the vicinity. The PFOA and PFOS concentrations in sediment and surface water will be used to coordinate and/or guide future surface water and sediment sampling. The PFOA and PFOS concentrations in soil will be used to identify the presence of potential source areas. Dennis Shepard
12/5/2019 Meeting or Teleconference Held An annual meeting occurred at EPA Region 10 offices (1200 6th Ave., Seattle, WA 98101) to discuss the Installation Restoration Program at Eielson Air Force Base. Representatives from the Air Force, U.S.EPA, Alaska Department of Natural Resources (DNR) and DEC met with their respective Attorneys and contractors to discuss the implementation of a Critical Water Management Area (CWMA) in the Community of Moose Creek. The CWMA is needed to prevent the use of, and protect against exposure to, perfluorooctanoic acid (PFOA) and perfluoro-octanesulfonate (PFOS) contaminated groundwater. The Air Force announced that a petition for the CWMA had been submitted to DNR. DNR staff clarified the process for establishing the CWMA and timelines for public notification and public comment. Dennis Shepard
12/31/2019 Document, Report, or Work plan Review - other DEC provided comments for the Draft Final Sampling and Analysis Plan (SAP), Project: F-35 Renovate Weapons Load Training Office & Hangar (B1340), Eielson Air Force Base, Revised December 11, 2019 (v4). The SAP is for a planned excavation for the F-35 project and is within the Eielson AFB 100% stockpile area due to the underlying PFAS plume. Dennis Shepard
1/10/2020 Public Notice On January 10, 2020 the Alaska Department of Fish and Game (ADF&G) issued Emergency Order No. 3-R-U-01-20 closing sport fishing at Polaris Lake on Eielson AFB and Kimberly Lake in North Pole. The Emergency order is in response to concentrations of per and poly fluorinated alkyl substances (PFAS)identified above the EPA lifetime health advisory level of 70 parts per trillion. Dennis Shepard
2/20/2020 Document, Report, or Work plan Review - other EPA and DEC jointly approved the Final Addendum #1, Perfluorinated Compounds Eielson Air Force Base and Moose Creek Quality Assurance Project Plan, Eielson Air Force Base (December 2019). The amended Uniform Federal Policy (UFP) Quality Assurance Project Plan (QAPP) Addendum has been prepared to update the Final Perfluorinated Compounds Eielson-Moose Creek Quality Assurance Project Plan Eielson Air Force Base, Alaska (USAF 2018a). This addendum provides revisions to the following UFP-QAPP work sheets:#1 - #7/8 and #16. The Addendum #1 also provides revised tables for the Proposed Field Sampling Program for: Plume Boundary Properties, Granulated Active Carbon (GAC) Treatment Systems, Public Water Supply (PWS) Systems, and Focused System Sampling. Dennis Shepard
3/5/2020 Document, Report, or Work plan Review - other DEC received the Draft Interim Technical Information Report (ITIR) for Fall 2019 Soil Stockpile Characterization Sampling Eielson Air Force Base, Alaska. The interim report documents the results of the sampling of nine of the F35 soil stockpiles located at Eielson AFB performed in late October and early November 2019. DEC also received the laboratory data deliverables including chromatograms and reports for the full suite of Per and poly fluorinated substances (PFAS)analyzed by method 537.1M. Dennis Shepard
3/18/2020 Document, Report, or Work plan Review - other DEC provided review comments for the Draft Interim Technical Information Report, Fall 2019 Soil Stockpile Characterization Sampling March, 2020. The report documents the results of the perfluorooctanoic acid (PFOA) and/or perfluorooctane sulfonate (PFOS) sampling of nine of the F35 soil stockpiles located at Eielson AFB. The stockpile sampling was performed in late October and early November 2019. The interim sampling was completed in order to evaluate the incremental sampling methodology (ISM) approach and revise the integrated Work Plan and Uniform Federal Policy for Quality Assurance Project Plan if needed. Dennis Shepard
3/18/2020 Document, Report, or Work plan Review - other DEC provided comments for the Draft Final Project-Specific Work Plan and Uniform Federal Policy for Quality Assurance Project Plan, Perfluorooctanoic acid (PFOA) and Perfluorooctanesulfonic Acid (PFOS) and Comingled PFOA/PFOS and Petroleum F-35 Soil Stockpiles Characterization Sampling Eielson Air Force Base, Alaska. The integrated Work Plan and Uniform Federal Policy for Quality Assurance Project Plan (UFP-QAPP) is part of the larger F-35A Beddown Program at Eielson Air Force Base (AFB), Alaska. The Work Plan addresses the chemical characterization of soil stockpiles generated during the F-35A Beddown Program. Dennis Shepard
4/9/2020 Update or Other Action On April 9, 2020, the Alaska Department of Fish and Game (ADF&G) issued emergency order No. 3-R-U-02-20. The emergency order rescinds Emergency Order No. 3-R-U-01-20, and opens Polaris Lake to catch-and-release sport fishing. The Emergency order is in response to concentrations of per and poly fluorinated alkyl substances (PFAS)identified above the EPA lifetime health advisory level of 70 parts per trillion. In December 2019, the Board of Fisheries adopted a regulation that allows catch-and-release fishing in stocked waters that have become contaminated. Polaris Lake is a popular sport fishery among residents of Eielson Air Force Base. Dennis Shepard
4/21/2020 Meeting or Teleconference Held A monthly remedial project manager (RPM) meeting was held to discuss various Eielson restoration projects. Garrison Slough remedial investigation and risk assessment step out sample locations were discussed. Status of PFAS investigations and a critical water management area for Moose Creek were also discussed.. Dennis Shepard
4/23/2020 Document, Report, or Work plan Review - other The U.S. Environmental Protection Agency (EPA) and Alaska Department of Environmental Conservation (DEC) jointly approved the Final Project-Specific Work Plan and Uniform Federal Policy for Quality Assurance Project Plan (UFP-QAPP), Perfluorooctanoic acid (PFOA) and Perfluorooctanesulfonic Acid (PFOS) and Comingled PFOA/PFOS and Petroleum F-35 Soil Stockpiles Characterization Sampling Eielson Air Force Base (AFB), Alaska (April 2020). This is an integrated Work Plan and UFP-QAPP for the larger F-35A Beddown Program at Eielson AFB, Alaska. Dennis Shepard
6/9/2020 Document, Report, or Work plan Review - other DEC completed a backcheck review and accepted all revisions to the Draft Final Groundwater Model Summary and Quality Report, Eielson Air Force Base, Alaska, May 2020. Dennis Shepard
6/17/2020 Document, Report, or Work plan Review - other DEC contaminated Sites program received the approved Final Groundwater Model Summary and Quality Report, June 2020, Eielson Air Force Base, Alaska. The numerical groundwater flow model was constructed and calibrated for Eielson Air Force Base in Alaska. The calibrated groundwater flow model was then used for simulation of contaminant fate and transport. The model will provide a tool to evaluate known and suspected groundwater contamination for selected contaminants of concern (COCs), including per- and polyfluoroalkyl substances (PFAS). This model will be updated by the Air Force as additional information concerning permafrost areas and hydro geological conditions become available. Dennis Shepard
6/18/2020 Document, Report, or Work plan Review - other EPA and DEC provided Joint Approval of the Final Groundwater Model Summary and Quality Report, Eielson Air Force Base, Alaska (June 2020). The numerical groundwater flow model was constructed and calibrated for Eielson Air Force Base(EAFB)in Alaska. The calibrated groundwater flow model was then used for simulation of contaminant fate and transport. The model will provide a tool to evaluate known and suspected groundwater contamination for selected contaminants of concern, including per- and polyfluoroalkyl substances (PFAS). It can also be used to support and guide the identification of priority sites at EAFB for additional investigations, remedial activities, programmatic planning, and evaluation of health and environmental impacts on potential receptors. Dennis Shepard
6/18/2020 Update or Other Action EPA and DEC provided Joint Approval of the Interim Technical Information Report, Fall 2019 Soil Stockpile Characterization Sampling, Eielson Air Force Base, Alaska, dated May 31, 2020. The report provides a discussion of field activities performed for stockpiled soils from the Eielson F-35A Beddown Program that may contain PFOA/PFOS or comingled PFOA/PFOS/POL. The report presents the results of the sampling of nine of the F35 soil stockpiles in late October and early November 2019. Dennis Shepard
8/11/2020 Meeting or Teleconference Held DEC, EPA and Air Force remedial project managers met to scope a remedial investigation for the per and poly fluorinated alkyl substances (PFAS) contaminated source areas on Eielson Air Force Base. Sample collection of soil, groundwater, surface water, sediments and biota were discussed. The Air Force confirmed that a contract for the work was awarded on August 4, 2020, and work plans are being prepared. Dennis Shepard
8/25/2020 Meeting or Teleconference Held An Eielson AFB Senior Leaders’ Annual Meeting was held to provide updates to the status of the Environmental Remedial Program at Eielson. Topics for discussion included: Moose Creek water distribution system,PFAS investigation results, DNR Critical Water Management Area, and Environmental Covenant packages for the Community of Moose Creek private properties. Dennis Shepard
9/10/2020 Document, Report, or Work plan Review - other The Alaska Department of Environmental Conservation (DEC) has provided review comments for a Draft Quality Assurance Project Plan, Addendum for Remedial Investigation for PFAS at Various Sites, Eielson Air Force Base and Moose Creek, Alaska, September 2020. The work plan describes proposed field activities associated with an initial groundwater sampling event for a PFAS remedial investigation, and includes collecting groundwater samples for laboratory analysis from 50 existing monitoring, water supply, or drinking water wells located throughout the Eielson Air Force Base installation. Dennis Shepard
11/19/2020 Update or Other Action DEC received the 2020 Final Site Management Plan Amendment, Eielson AFB, dated 19 Nov 2020. The Site Management Plan establishes milestones associated with the performance of work and submittal of documents as stipulated in the Federal Facility Agreement for Eielson Air Force Base (AFB), and fulfills the requirements of Paragraph 5.4 of the April 2013 Institutional Control / Land Use Control (IC/LUC) Settlement Agreement. Dennis Shepard
1/29/2021 Document, Report, or Work plan Review - other DEC received a draft Quality Assurance Project Plan, Remedial Investigation (RI) for PFAS at Various Sites, Eielson AFB, Alaska. The purpose of the RI is to characterize the nature and extent of 24 PFAS compounds, specifically perfluorooctane sulfonate (PFOS),perfluorooctanoic acid (PFOA), and Perfluorobutane sulfonic acid (PFBS) through the application of adaptive high-resolution site characterization and the development of a flux-based conceptual site model.The outcome of the RI will be (1) flux-based ranking of sources and mapping of migration pathway(s), and (2) delineation of soil, groundwater, sediment, and surface water impacts. Dennis Shepard
2/26/2021 Document, Report, or Work plan Review - other DEC reviewed and provided comments on Appendix D – Environmental Covenant, Moose Creek water Expansion Project, Remedial Action Work Plan. The document was received on 2/23/2021. Appendix D references the Moose Creek Environmental Covenant packages sent to property owners, and provides the processing steps for the Environmental Covenants. Axl LeVan
4/29/2021 Document, Report, or Work plan Review - other DEC contaminated Sites program received the Draft 2019 – 2020 ANNUAL GROUNDWATER MONITORING REPORT FOR PER – AND POLYFLUOROALKYL SUBSTANCES, Eielson Air Force Base, Alaska, April 2021. Dennis Shepard
5/19/2021 Document, Report, or Work plan Review - other DEC received a Construction Work Plan for the Sampling and Analysis Plan for EIE408 Repair Arctic Utilidor Phase D at Eielson AFB, on April 19 2021. The document describes the work planned for the retrofitting and upgrading of lift stations and providing electrical connections. The site will require excavation and stockpiling activities located at SS304P and DD097, which are located within the 100% stockpile boundary. The construction area is within the Basewide PFAS plume. Comments and response sent on this date. Cascade Galasso-Irish
6/1/2021 Document, Report, or Work plan Review - other EPA and DEC reviewed and provided a joint approval on Appendix D – Environmental Covenant, Moose Creek water Expansion Project, Remedial Action Work Plan. Appendix D references the Moose Creek Environmental Covenant packages sent to property owners, and provides the processing steps for the Environmental Covenants. Axl LeVan
6/11/2021 CERCLA RI Plan Approved The Alaska Department of Environmental Conservation (DEC) approved the Final Quality Assurance Project Plan, Remedial Investigation for PFAS at Various Sites, Eielson Air Force Base, Fairbanks North Star Borough, Alaska, June 2021. The purpose of the Remedial Investigation (RI) is to characterize the nature and extent of 24 PFAS compounds, specifically perfluorooctane sulfonate (PFOS), perfluorooctanoic acid (PFOA), and perfluorobutanesulfonic acid (PFBS) through the application of adaptive high-resolution site characterization and the development of a flux-based conceptual site model (CSM). Although DoD and DEC are not in agreement on the screening level to utilize for completing the RI soil characterization, both parties are making progress to come up with a consensus for moving forward on this issue, and considering that this RI will be re-evaluated to determine a path forward for completing the soil delineation in areas that may require further investigation, with exception of the QAPP Worksheet #11 and QAPP Worksheet #15, the Final Quality Assurance Project Plan, Remedial Investigation for PFAS at Various Sites, Eielson Air Force Base, Fairbanks North Star Borough, Alaska, June 2021 was approved. Dennis Shepard
6/15/2021 Document, Report, or Work plan Review - other U.S EPA and DEC approved the Final UFP QAPP EIE 426 Tank 55 and 56 Replacement, Tank335-1 and 3352-2 Replacement, Eielson Air Force Base (May 2021). The UFP-QAPP describes the overall process for removing and disposing of soil potentially contaminated with petroleum and per- and polyfluoroalkyl substances (PFAS); performing confirmation soil sampling on the excavation floor and sidewalls; and performing confirmation sampling on clean and segregated stockpiled soil prior to reuse or disposal. Dennis Shepard
6/17/2021 Document, Report, or Work plan Review - other U.S EPA and DEC approved the Final 2021 Quality Assurance Project Plan (QAPP) Addendum to the Final Perfluorinated Compounds Eielson-Moose Creek Quality Assurance Project Plan Eielson Air Force Base, Alaska (USAF 2018) for Eielson Air Force Base. The QAPP addendum updates the Final Perfluorinated Compounds Eielson-Moose Creek Quality Assurance Project Plan Eielson Air Force Base, Alaska (USAF 2018) in order to conduct sampling associated with the per- and polyfluoroalkyl substances (PFAS) release from Eielson Air Force Base (AFB) in Moose Creek, Alaska. The addendum provides for sampling 40 existing monitoring wells twice during 2021. Dennis Shepard
6/23/2021 Document, Report, or Work plan Review - other DEC provided comments for a Draft 2021 Treatability Study Report, PFAS-Impacted Wastewater Treatability Study Extension on Eielson Air Force Base. The objectives of the study were to assess the efficacy of treating wastewater using ion exchange (IX) resin, and to design and build a wastewater pretreatment system to remove various other contaminants prior to treatment of per- and polyfluoroalkyl substances (PFAS) using IX resin. Dennis Shepard
6/25/2021 Site Visit DEC staff conducted a site inspection of the Eielson PFAS contaminated stockpile locations. Stockpile conditions, liner and cover conditions were observed and recorded. The Eielson stockpile SOP was used as a checklist. Several issues were noted for the EIE 386 stockpiles that were in progress of being removed for disposal. However, most stockpiles were found to be in good condition. Dennis Shepard
7/22/2021 Institutional Control Update DEC sent a letter to the United States Air Force (USAF) requesting consideration of interim land use controls (LUCs) for soil in the areas affected by perfluorooctanesulfonic acid (PFOS) and perfluorooctanoic acid (PFOA) in groundwater in the Community of Moose Creek AK, until such time as the USAF completes soil sampling and characterizes PFOS and PFOA in soil. Interim LUCs may be required under the 2013 Eielson AFB CERCLA 120 Settlement Agreement (IC/LUC), and the 1990 Eielson AFB Federal Facility Agreement (FFA) applies to Eielson AFB as the “Site.” Per Paragraph 2.1(x) of the FFA, “The Site includes any off-base area contaminated by the migration of hazardous substances, pollutants, contaminants, or constituents from the Site.” Dennis Shepard
7/28/2021 Meeting or Teleconference Held On July 27 & 28, the Eielson Air Force Base (AFB) held its Annual Senior Leaders meeting. The meeting was held to discuss issues of concern for upper management at EPA, DEC and the US Air Force. A site visit was conducted at Eielson AFB on day one, and PFAS sites and PFAS stockpiles were visited. On day two, discussions concerned PFAS stockpile characterization and disposal, PFAS Remedial Investigation screening levels, and general discussions of EPA PFAS rule making status. Dennis Shepard
8/6/2021 Document, Report, or Work plan Review - other The U.S. Environmental Protection Agency (EPA) and Alaska Department of Environmental Conservation (DEC) completed review and provided approval for the Final 2019-2020 Annual Groundwater Monitoring Report for Per – and Polyfluoroalkyl Substances, Eielson Air Force Base, Alaska Contract No. W911KB-17-C-0013, July 2021. The report summarizes the groundwater monitoring activities conducted during 2019 and 2020 for perfluorooctanoic acid (PFOA)/perfluorooctanesulfonic acid (PFOS) groundwater contamination within the boundary of the Eielson Air Force Base in Moose Creek, Alaska. Dennis Shepard
8/6/2021 Document, Report, or Work plan Review - other The U.S. Environmental Protection Agency (EPA) and Alaska Department of Environmental Conservation (DEC) completed review and provided approval for the Final Remedial Investigation/Feasibility Study Interim Data Report and Work Plan Addendum, Source Areas SS062 and SS067, Eielson Air Force Base, Alaska (July 2021). The final version of this report was received by the regulators on July 30, 2021. The report is a combined Interim Data Report for samples collected during the 2019 field season and a Work Plan Addendum (WPA) to the 2019 Remedial Investigation/Feasibility Study Management Plan, Source Areas SS062 and SS067 (RI/FS MP) (U.S. Air Force [USAF] 2019). The Interim Data Report summarizes and analyzes the data collected in 2019 to determine if additional sampling is needed to complete project goals. Dennis Shepard
8/6/2021 Update or Other Action The U.S. Environmental Protection Agency (EPA) and Alaska Department of Environmental Conservation (DEC) approved field change forms for adjustment of the laboratory to be used for soil sieve analysis for the Per – and Polyfluoroalkyl Substances (PFAS) remedial investigation at Eielson Air Force Base. Field change forms have also been approved for various Remedial Investigation step out decisions and to document deviations from the approved work plan. Dennis Shepard
8/6/2021 Document, Report, or Work plan Review - other The U.S. Environmental Protection Agency (EPA) and Alaska Department of Environmental Conservation (DEC) approved the Final 2019-2020 Annual Groundwater Monitoring Report for Per – and Polyfluoroalkyl Substances, Eielson Air Force Base, Alaska Contract No. W911KB-17-C-0013, July 2021. The report summarizes the groundwater monitoring activities conducted during 2019 and 2020 for perfluorooctanoic acid (PFOA)/perfluorooctanesulfonic acid (PFOS) groundwater contamination within the boundary of the Eielson Air Force Base in Moose Creek, Alaska. Dennis Shepard
8/12/2021 Document, Report, or Work plan Review - other DEC received a Draft Expanded Perfluorooctane Sulfonate (PFOS), Perfluorooctanoic Acid (PFOA), and Perfluorobutane Sulfonate (PFBS) Site Inspection (SI) Report for Eielson Air Force Base and Moose Creek, Alaska. The Expanded SI Report describes the results of activities performed from July 2019 through October 2020, and recommends future activities at Eielson AFB and the adjacent community of Moose Creek. The goal of the Expanded SI was to further delineate known PFOS, PFOA, and PFBS groundwater contamination migrating off Eielson AFB to the community of Moose Creek, impacting the groundwater that the community of Moose Creek uses as its domestic water source. Investigated media included groundwater, soil, sediment, and surface water. Dennis Shepard
8/20/2021 Document, Report, or Work plan Review - other DEC provided comments for the EIE 376 Dewatering Weir, Field Sampling Report version 1.2, Eielson Air Force Base, Alaska, dated November 2020. The document which was received on August 18, 2021, presents summary details of analytical sample collection from the Weir Pond constructed in association with the EIE376 project at Eielson AFB, Alaska. Contaminants of potential concern included perfluorooctanesulfonic acid (PFOS) and perfluorooctanoic acid (PFOA). Based on analytical sampling results obtained from a May 8, 2020 sampling event, PFOS analytes were detected in sediment samples above applicable cleanup levels listed in 18 AAC 75.341. All water samples collected in the weir pond cells were below applicable DEC Table C groundwater cleanup levels found in 18 AAC 75.345, and below the EPA Lifetime Health Advisory level for PFOS + PFOA. Dennis Shepard
8/20/2021 Update or Other Action DEC provided comments for the Draft 2021 Environmental Restoration Program Atlas, Eielson Air Force Base, Alaska, August 2021. The Restoration Atlas identifies current Eielson restoration sites, the interim land use controls and institutional controls for those sites, site features and installation features where applicable. The 2021 Atlas includes areas within the Community of Moose Creek that have been impacted by perfluorooctanesulfonic acid (PFOS) and perfluorooctanoic acid (PFOA) from Eielson Air Force Base source areas. Dennis Shepard
9/7/2021 Document, Report, or Work plan Review - other DEC provided comment acceptance and approval for the Draft Final Closure Report, Soil Management for Construction Activities, EIE 388 F-35A Fuel Truck Shelter, Revision 4, August 2021, Eielson Air Force Base, Alaska. The closure report documents soil management activities performed during construction of the EIE388 F-35A Fuel Truck Shelter over the 2018, 2019, and 2020 field seasons. Removal of both contaminated and non-contaminated soil was required during the construction. Soil excavation was limited to the extent required for construction. PFOS and PFOA contaminated soil was placed in the Eielson long term stockpile location pending disposal. Dennis Shepard
9/8/2021 Document, Report, or Work plan Review - other DEC provided review comments for the Sampling and Analysis Plan, EIE429 Repair Moose Lake Housing Utilities Eielson Airforce Base, Eielson Air Force Base, Alaska, July 2021. The sampling and analysis plan (SAP) outlines the sampling and analysis of potentially fuel impacted soil, and other contaminated soil, during the repairing of the Moose Lake Housing Utilities. Based on a review of the site, no contamination is expected to be encountered during this project aside from the overlap with the site wide PFAS plume. Dennis Shepard
10/4/2021 Document, Report, or Work plan Review - other The U.S. Environmental Protection Agency (EPA) and Alaska Department of Environmental Conservation (DEC) approved the Final 2020 Institutional Controls/Land Use Controls Annual Report, Eielson Air Force Base, Alaska (September 2021). The U.S. Air Force (USAF), is responsible for implementing, maintaining, reporting on, and enforcing LUCs at Eielson Air Force Base (AFB). LUCs are required to be maintained at Eielson AFB until the concentration of hazardous substances in the soil and groundwater are at levels that allow for unlimited use and unrestricted exposure (UU/UE). ICs are an administrative subset of LUCs, which also include engineering controls, physical barriers (i.e., fences and security guards), and non-physical boundaries (i.e., a 200-foot buffer zone surrounding the known contaminant and administrative boundaries established for contaminated sites). This report reviews individual ICs established by the ROD documents for Installation Restoration Program source areas with enforceable ICs, as well as other contaminated sites currently with LUCs in effect. Dennis Shepard
10/12/2021 Document, Report, or Work plan Review - other DEC provided comments for the Stockpile Characterization Report, Perfluorooctanoic Acid (PFOA) And Perfluorooctane Sulfonate (PFOS) and Comingled PFOA/PFOS and Petroleum F35 Soil Stockpile Characterization Sampling, Eielson Air Force Base, Alaska, September 2021. The report discusses results from three stockpile sampling events conducted in October 2019, June 2020, and September 2020 using incremental sampling methodology (ISM) in accordance with the Interstate Technology and Regulatory Council ISM guidance (ITRC 2020). Dennis Shepard
10/20/2021 Institutional Control Periodic Reporting DEC completed a backcheck and approved the Final Land Use Control Implementation Plan (LUCIP) 2021, United States Air Force, Eielson Air Force Base, Alaska, October 2021.The LUCIP satisfies regulatory obligations and aids the USAF in the goal of protecting human health and the environment. The requirements for ICs specified in RODs and ROD amendments are enforced by the requirements of the Federal Facility Agreement (FFA) (EPA et al. 1990), the State Two-Party Agreement (ADEC and USAF 2014), and the IC/LUCs Settlement Agreement (ADEC, EPA, and USAF 2013). Dennis Shepard
10/20/2021 Institutional Control Periodic Reporting DEC completed a backcheck and approval of the Final 2021 Environmental Restoration Program Atlas, Eielson Air Force Base, Alaska, October 2021. The Restoration Atlas identifies current Eielson restoration sites, the interim land use controls and institutional controls for those sites, site features and installation features where applicable. Dennis Shepard
10/25/2021 Meeting or Teleconference Held A Remedial Project Managers monthly meeting was held via teleconference. Eielson PFAS Remedial Investigation status and findings discussed. The DSMOA Joint Execution Plan was discussed during the 2 party portion of the meeting. Dennis Shepard
11/12/2021 Document, Report, or Work plan Review - other The Alaska Department of Environmental Conservation approved the Final Sampling and Analysis Plan, EIE429 Repair Moose Lake Housing Utilities Eielson Airforce Base, Alaska, dated July 2021. The sampling and analysis plan (SAP) outlines the sampling and analysis of potentially fuel impacted soil, and other contaminated soil, during the repairing of the Moose Lake Housing Utilities. Based on a review of the site, no contamination is expected to be encountered during this project aside from the overlap with the site wide PFAS plume. Dewatering will be a part of this project and will be done in accordance with an approved dewatering plan, submitted and approved separately. No dewatering shall occur until an approved plan is in place. Dennis Shepard
12/17/2021 Document, Report, or Work plan Review - other The U.S. Environmental Protection Agency (EPA) and Alaska Department of Environmental Conservation (DEC) approved the Final 2021 Perfluorooctanoic Acid (PFOA), Perfluorooctane Sulfonate (PFOS) and Comingled PFOA/PFOS and Petroleum F35 Soil Stockpile Characterization Sampling, Eielson Air Force Base, Alaska (December 2021). The report discusses results from three stockpile sampling events conducted in October 2019, June 2020, and September 2020 using incremental sampling methodology (ISM). Sample results were compared to the most stringent DEC Soil Cleanup levels identified in 18 AAC 75.341, Table B1 and B2. Approximately 130,000 cubic yards of PFOS/PFOA contaminated soil was confirmed through the sampling. Dennis Shepard
1/14/2022 Document, Report, or Work plan Review - other DEC provided review comments for the Draft Quality Assurance Project Plan, Soil Management for Construction Activities, Repair South Ramp Entrance Taxiway T39A, dated December 20, 2021. The project includes a mill-and-pave operation of the south ramp entrance, asphalt concrete surface and drainage improvements. Removal of both contaminated and non-contaminated soil may be required. Soil excavation will be limited to the extent required for construction. Sample collection will be performed by a DEC Qualified Environmental Sampler (QES) or Qualified Environmental Professional (QEP) as defined in 18 Alaska Administrative Code (AAC) 75, and Field Reports will be prepared by a DEC QEP. Dennis Shepard
2/1/2022 Document, Report, or Work plan Review - other The U.S. Environmental Protection Agency (EPA) and Alaska Department of Environmental Conservation (DEC) provided approval for the Closure Report for EIE 408 Repair Arctic Utilidor Phase D, Eielson AFB, Alaska, Version 1.3 (January 2022). This construction closure report presents details of field screening and analytical sampling completed for the work at Manholes 12 and 19 of the EIE 408 – Repair Arctic Utilidor project. Based on the reporting, one soil stockpile containing approximately 15 cubic yards of material was sampled, and indicated Perfluorooctanesulfonic acid (PFOS) above the DEC soil cleanup levels. The PFOS contaminated soil is programmed for disposal at an approved facility. Dennis Shepard
2/2/2022 Document, Report, or Work plan Review - other The U.S. Environmental Protection Agency (EPA) and Alaska Department of Environmental Conservation (DEC) approved the Final Site Closure Report, EIE 379 Hanger/SQD. OPS AMU Squad #2, Revision 1.4, (January 2022) Eielson Air Force Base, Alaska. The report describes field activities conducted in 2018 and 2019; including field screening, and analytical sampling results at seven separate excavations conducted for the project. Analytical sampling indicated Perfluorooctanesulfonic Acid (PFOS) and/or Perfluorooctanoic Acid (PFOA) above applicable cleanup levels in stockpile soils, and remaining at the limits of excavation. Dennis Shepard
2/9/2022 Update or Other Action DEC approved and signed the Decision Document for Eielson Performance Based Remediation Source Areas SO075, SS078, SO504, MY512, and MY518, Eielson Air Force Base, Alaska (May 2021). The Decision Document describes the remedial actions at Eielson Source Areas SO075, SS078, SO504, MY512, and MY518, all of which are associated with potential contamination resulting from petroleum, storage, distribution, and/or use. The U.S. Air Force (USAF) is managing remediation of petroleum, oil, and lubricants (POL) or petroleum-related contamination at these source areas in accordance with the State-Eielson Agreement (USAF 2014d), the two-party agreement. Any Comprehensive Environmental Response, Compensation, and Liability Act (CERCLA) constituents remaining will be addressed by transferring source areas back to the Eielson Air Force Base, Federal Facility Agreement Under CERCLA Section 120 (USAF 2013a), the three-party agreement. Dennis Shepard
3/11/2022 CERCLA SI DEC provided review comments for the responses to DEC comments for the Draft Expanded Perfluorooctane Sulfonate (PFOS), Perfluorooctanoic Acid (PFOA), and Perfluorobutane Sulfonate (PFBS) Site Inspection (SI) Report for Eielson Air Force Base and Moose Creek, Alaska, July 2021. This Expanded SI Report describes the results of activities performed and recommends future activities at Eielson AFB, and the adjacent community of Moose Creek. The goal of the Expanded SI was to further delineate known PFOS, PFOA, and PFBS groundwater contamination migrating off Eielson AFB to the community of Moose Creek, Alaska. Dennis Shepard
3/14/2022 Document, Report, or Work plan Review - other DEC provided review comments for the Draft Uniform Federal Policy – Quality Assurance Project Plan (UFP-QAPP), Environmental Construction and Services, Remedial Action – Construction at Multiple sites: TU077, SS079, CG517 and ZZ088, Eielson Air Force Base, Alaska (February 2022). The UFP-QAPP details the remedial excavation services to be performed at Eielson Air Force Base (AFB) sites TU077, SS079, CG517, and ZZ088. Remedial excavation is proposed at sites TU077, SS079, and CG517 to remove up to 6,500 cubic yards (cy) of POL-contaminated soil in the vadose zone in order to eliminate the potential exposure concerns to human health and the environment. Remedial excavation is proposed at site ZZ088 to remove up to 350 cy of lead contaminated soil, as well as encapsulate the former communications building frame with a concrete cap. Dennis Shepard
4/5/2022 Document, Report, or Work plan Review - other The U.S. Environmental Protection Agency (EPA) and Alaska Department of Environmental Conservation (DEC) provided approval for the EIE 444 Repair 8-Inch Receipt Pipeline for Class 300 Service, Uniform Federal Policy - Quality Assurance Project Plan (UFP-QAPP) v4, Eielson Air Force Base, Alaska (March 21, 2022).The EIE 444 UFP-QAPP provides details for repair, upgrade, and requalification of the primary Eielson AFB JP-8 receipt pipeline. The document is a site-specific UFP-QAPP for the EIE444 project and is for Pipeline Repair Sites not covered by the Eielson Air Force Base Generic Sampling and Analysis Plan (SAP) to include Installation Restoration Program (IRP) sites, and sites within the Per and Polyfluoroalkyl Substances (PFAS) plume. The work is located at various sites between North Pole, Alaska and Eielson Air Force Base, Alaska. Dennis Shepard
4/8/2022 Document, Report, or Work plan Review - other EPA and DEC provided approval for the Final Environmental Summary Report Revision 3, EIE 389 F-35A Satellite Dining Facility, Eielson Air Force Base, Alaska, (February 2022). The EIE 389 Satellite Dining Facility project included design and construction of a dining facility, utilities and associated pavement to support the F35A Beddown program at Eielson Air Force Base, Alaska. Soil screening and analytical sample analysis was conducted on the project for approximately 4,500 cubic yards of excavated material from an 18,000 square feet of excavation footprint. Approximately 2,000 cubic yards of perfluoro-octane sulfonate (PFOS) and perfluoro-octanoic acid (PFOA) were excavated and transported to the long term stockpile laydown yard for further characterization and disposal. Dennis Shepard
4/8/2022 Interim Removal Action Approved DEC and EPA provided Joint Approval of the Final Work Plan Disposal of PFAS Contaminated Soil Stockpiles EIE379, EIE385, EIE389, EIE377, and EIE388, Eielson Air Force Base, Alaska (April 2022). The work plan was developed to describe the process that will be used to transport and dispose of previously excavated per-and polyfluoroalkyl substances (PFAS) contaminated soil that is currently stockpiled at Eielson Air Force Base (AFB), Alaska. Dennis Shepard
4/27/2022 Meeting or Teleconference Held DEC met with the Air Force and contractor and with EPA to discuss the ongoing PFAS RI scope of work for the validated PFAS source areas. Status of the results from borings installed in 2021 was discussed and horizontal step-outs and vertical step-downs were proposed. Dennis Shepard
4/29/2022 Document, Report, or Work plan Review - other DEC and EPA approved the Field Change Form #9 (FCF-RI-9) for the Remedial Investigation (RI) for per- and polyfluoroalkyl substances (PFAS) at Various Sites at the Eielson Air Force Base (EAFB) in Fairbanks North Star Borough, Alaska. The FCF proposed step-out boring locations for the PFAS remedial investigation. Dennis Shepard
5/10/2022 Document, Report, or Work plan Review - other DEC and EPA approved the Field Change Form #10 (FCF-RI-10) for the Remedial Investigation (RI) for per- and polyfluoroalkyl substances (PFAS) at Various Sites at the Eielson Air Force Base (EAFB) in Fairbanks North Star Borough, Alaska. The FCF proposed stepout boring locations and updated worksheets #17 & #18 of the approved work plan for the PFAS remedial investigation. Dennis Shepard
5/12/2022 Document, Report, or Work plan Review - other DEC provided a review of the responses to DEC comments and the Draft Final Expanded Perfluorooctane Sulfonate (PFOS), Perfluorooctanoic Acid (PFOA), and Perfluorobutane Sulfonate (PFBS) Site Inspection (SI) Report for Eielson Air Force Base and Moose Creek, Alaska, April 2022. This Expanded SI Report describes the results of activities performed and recommends future activities at Eielson AFB, and the adjacent community of Moose Creek. The goal of the Expanded SI was to further delineate known PFOS, PFOA, and PFBS groundwater contamination migrating off Eielson AFB to the community of Moose Creek, Alaska. There are few remaining responses requiring Air Force clarification Dennis Shepard
5/24/2022 Document, Report, or Work plan Review - other A Triad meeting was held to review sample results from transects of borings installed for the PFAS RI, and to select locations for step-outs or step-downs based on the sampling results to date. Dennis Shepard
6/7/2022 Document, Report, or Work plan Review - other DEC and EPA issued a joint approval letter for the Final 2022-2023 Quality Assurance Project Plan (QAPP) Addendum to the Final Perfluorinated Compounds Eielson-Moose Creek Quality Assurance Project Plan Eielson Air Force Base, Alaska (USAF 2018), Eielson Air Force Base (May 2022). The document was submitted to DEC and EPA on May 10, 2022. The addendum pertains to the sampling of 80 existing monitoring wells biannually for two years (2022-2023) for PFAS sampling and updated the original 2018 work plan. Axl LeVan
6/8/2022 Document, Report, or Work plan Review - other DEC approved the Final Closure Report, EIE405 F-35A AGE Extend Steam-Water Utiliduct, Eielson Air Force Base, Alaska dated October 2021, Revision 3 -May 2022. The report discusses construction of an 8,900 lineal feet (lf) utiliduct extending from the power plant at the north end of the project to the F-35A infrastructure area to the south end of the project. Potentially contaminated soil stockpiled during excavations was also screened and sampled for disposal. Contaminated soil disposal was documented in the report with ADEC Transport, Treatment, & Disposal Approval Forms provided. Dennis Shepard
6/8/2022 Document, Report, or Work plan Review - other DEC approved the Field Summary Report (version 1.7) for EIE 376 Contract (includes work performed at Adjacent EIE 379 and EIE 389 Sites), F-35A Hanger/Propulsion Maint/Dispatch, Eielson Air Force Base, Alaska. The report presents summary details of field screening and analytical sampling completed within the EIE 376, EIE 379 and EIE 389 construction project footprints. Dennis Shepard
6/13/2022 Document, Report, or Work plan Review - other DEC and EPA approved the Field Change Form #12 (FCF-RI-12) for the Remedial Investigation (RI) for per- and polyfluoroalkyl substances (PFAS) at Various Sites at the Eielson Air Force Base (EAFB) in Fairbanks North Star Borough, Alaska. The FCF proposed stepout boring locations for the PFAS remedial investigation. Dennis Shepard
6/23/2022 Document, Report, or Work plan Review - other DEC and EPA approved the Field Change Form #13 (FCF-RI-13) for the Remedial Investigation (RI) for per- and polyfluoroalkyl substances (PFAS) at Various Sites at the Eielson Air Force Base (EAFB) in Fairbanks North Star Borough, Alaska. The FCF proposed a revised step-out boring location for the PFAS remedial investigation. Dennis Shepard
7/12/2022 Document, Report, or Work plan Review - other DEC approved the Closure Report, EIE 382 F-35A Weather Shelter, Squad #2, Eielson Air Force Base, Alaska (Revision 4: June 25, 2022). The report summarizes the field screening, analytical sampling and site characterization conducted for the ‘EIE382 F-35A Weather Shelter, Squad #2’ project. The project consisted of constructing a 16-bay aircraft shelter with concrete slab foundation. The report contains a summary of on-site work and includes field observations and analytical data from sampling activities. Specific characterization activities included collection of groundwater samples from dewatering discharge, pre and post-stockpile under-liner analytical ISM sampling, PID field screening of excavated soils, collection of discrete analytical soil confirmation samples from all final excavation, and collection of analytical ISM samples from all non-Perfluorooctanesulfonic Acid (PFOS) / Perfluorooctanoic Acid (PFOA) soil stockpiles to determine disposal status. Dennis Shepard
7/12/2022 Document, Report, or Work plan Review - other DEC approved the Closure Final Report, FTQW 19-1003 Repair Parachute Shop, Eielson Air Force Base, Alaska (dated February 2022, Final Revision June 23, 2022). The Parachute Shop project consisted of renovating and repairing the building and surrounding site. Soil excavation was limited to the extent required for construction. Results of stockpile sampling indicated perfluorooctanoic acid (PFOS), Pentachlorophenol (PCP), and Diesel Range Organics (DRO) were present above applicable Method Two, Table B1 and Table B2 Soil Cleanup Levels. Dennis Shepard
7/18/2022 Document, Report, or Work plan Review - other A Triad meeting was held to review sample results from transects of borings installed for the PFAS RI, and to select locations for step-outs or step-downs based on the sampling results to date. DEC and EPA approved the Field Change Form #14 (FCF-RI-14) for the Remedial Investigation (RI) for PFAS. Dennis Shepard
8/8/2022 CERCLA SI DEC and EPA provided approval for the Final Expanded Perfluorooctane Sulfonate (PFOS), Perfluorooctanoic Acid (PFOA), and Perfluorobutane Sulfonate (PFBS) Site Inspection (SI) Report for Eielson Air Force Base and Moose Creek, Alaska (July 2022). The goal of the Expanded SI was to further delineate known PFOS, PFOA, and PFBS groundwater contamination migrating off Eielson AFB to the community of Moose Creek, Alaska. The Expanded SI Report describes the results of sampling activities performed and recommends future remedial investigation activities at Eielson AFB, and the adjacent community of Moose Creek. Dennis Shepard
9/6/2022 Meeting or Teleconference Held A Triad meeting was held to review sample results from transects of borings installed for the PFAS RI, and to select locations for step-outs or step-downs based on the sampling results to date. Dennis Shepard
9/13/2022 Document, Report, or Work plan Review - other DEC provided comments for the Draft Closure Report, EIE 386 F-35A Consolidated Munitions Admin Facility, Eielson Air Force Base, Alaska (Revision 2: July 28, 2022). The project consisted of design-building a facility that provides administrative spaces for munitions command, control, operations, mobility, line delivery, storage, conventional munitions training, and munitions support equipment maintenance functions. The EIE386 project site was located within three (3) IRP sites (ST016, SS036, and MY529). All excavated soils from the project were placed into stockpiles segregated by source area contaminants of concern including 6,954 cubic yards of PFOA/PFOA contaminated soil. Analytical samples were collected from all stockpiles to characterize them for disposal. Dennis Shepard
9/19/2022 Document, Report, or Work plan Review - other DEC and EPA approved the Field Change Form #15 (FCF-RI-15) for the Remedial Investigation (RI) for per- and polyfluoroalkyl substances (PFAS) at Various Sites at the Eielson Air Force Base (EAFB) in Fairbanks North Star Borough, Alaska. The FCF proposed revised step-out boring locations for the PFAS remedial investigation. Dennis Shepard
9/20/2022 Document, Report, or Work plan Review - other The U.S. Environmental Protection Agency (EPA) and Alaska Department of Environmental Conservation (DEC) provided approval of the Final 2021 Institutional Controls/Land Use Controls Annual Report, Eielson Air Force Base, Alaska (dated September 2022). This report reviews individual ICs established by the record of decision (ROD) documents for Installation Restoration Program source areas with enforceable ICs, as well as other contaminated sites currently with LUCs in effect on Eielson Air Force Base, Alaska. Dennis Shepard
9/22/2022 Document, Report, or Work plan Review - other DEC provided review comments for the Draft Work Plan, EIE 446 Eielson ADAL JPARC Range Operations Center, Eielson Air Force Base, Alaska, September 6, 2022. The work plan was developed to perform a subsurface exploration program and provide geotechnical and chemical data reports for the EIE466, Eielson ADAL JPARC Range Operations Center Eielson Air Force Base (AFB), Alaska. Collection of environmental samples and subsequent chemical analysis is part of the scope of work. Dennis Shepard
9/23/2022 CERCLA Removal Action Report An Action Memorandum was submitted by the Air Force for the Time-Critical Removal Action of perfluorooctanesulfonic acid (PFOS) and perfluorooctanoic acid (PFOA) Contaminated Drinking Water at Eielson Air Force Base, Alaska. The action memorandum is issued in accordance with, and to satisfy the requirements of the Comprehensive Environmental Response, Compensation and Liability Act (CERCLA, at Title 42 USC §9604), as further implemented by the National Contingency Plan (NCP, at Title 40 CFR §300.415). The action completed installation of the granular activated carbon (GAC) system at the base water treatment plant and excavated and disposed of approximately 350 cu yd of contaminated soil within the construction footprint of the permanent GAC system at the Water Treatment Plant. Dennis Shepard
10/5/2022 Document, Report, or Work plan Review - other EPA and DEC jointly approved the Final 2022 Environmental Restoration Program Atlas, Eielson Air Force Base, Alaska (dated September 2022). The Atlas identifies current Eielson restoration sites, the interim land use controls and institutional controls (ICs) for those sites, and site features and installation features. The figures in the Atlas provide the decision document controls, base administrative controls, and ICs for each site, along with present groundwater plumes, restricted soil excavation areas, and contaminants of concern at the sites. Dennis Shepard
10/26/2022 Document, Report, or Work plan Review - other DEC reviewed and approved the "Final Sampling and Analysis Plan, Hursey Gate Improvements FTQW 21-6000, Eielson Air Force Base, Alaska, October 2022". The work plan outlines fields screening and soil sampling activities during geotechnical and environmental exploration for the Hursey Gate Improvement project at Eielson Air Force Base. The area is known to be within the Eielson PFAS plume. Axl LeVan
11/1/2022 Document, Report, or Work plan Review - other DEC provided review comments for the Draft Supplemental Remedial Investigation (RI) Work Plan (WP) Addendum, Eielson Air Force Base, Alaska, September 2022. The Supplemental RI Work Plan Addendum is prepared with the intention of providing a detailed approach to support the objectives of characterizing contamination in general accordance with the Comprehensive Environmental Response, Compensation, and Liability Act (CERCLA) and applicable state laws at 29 source areas within Operable Unit (OU) 1, OU2, OU4, and OU6 at Eielson AFB. This supplemental work plan addendum complements the primary planning documents Final Supplemental Remedial Investigation Work Plan Eielson Air Force Base, Alaska (September 2022) (Gaps 1 Work Plan) and the Risk Assessment Work Plan (USAF 2016). Dennis Shepard
11/14/2022 Document, Report, or Work plan Review - other DEC provided backcheck and accepted comment responses for the Draft Final Phase II Source Evaluation Report for Sites DA112, SO113, SO114, SO115, SO116, SO117, SR109, SS110, TU105, TU106, TU108 at Eielson Air Force Base, Alaska (November 2022). Dennis Shepard
11/14/2022 Meeting or Teleconference Held The first meeting of the Working Group for the Development of a Site-Specific Soil Cleanup Values for Aqueous Film Forming Foam Constituents at Eielson Air Force Base was held. The meeting introduced proposed methodology for use of Lysimeters to evaluate vadose zone source areas with PFAS contamination. The Air Force, Its contractors (BEM & Arcadis), EPA & DEC managers and technical staff, and University of Arizona research professor that will be the primary developer of the approach. Dennis Shepard
11/15/2022 Document, Report, or Work plan Review - other DEC provided review comments for the Draft EIE 423 Closure Report, Renovate Nose Dock 1, Eielson Air Force Base, Alaska, Revision 3, dated October 19, 2022. Dennis Shepard
12/27/2022 Document, Report, or Work plan Review - other DEC provided approval for the Final Closure Report, EIE 386 F-35A Consolidated Munitions Admin Facility, Eielson Air Force Base, Alaska (Revision 3: October 18, 2022). The EIE386 project site was located within three (3) IRP sites (ST016, SS036, and MY529). All excavated soils from the project were placed into stockpiles segregated by source area, contaminants of concern, and PID field screen results. Analytical samples were collected from all stockpiles to characterize them for disposal. Dennis Shepard
12/30/2022 Document, Report, or Work plan Review - other DEC provided review comments for the Draft Uniform Federal Policy-Quality Assurance Project Plan, Environmental Construction and Services, Remedial Action – Construction LF003 Holding Cell Repair, United Air Force Civil Engineer Center dated December 2022. During site activities, the field team will manage and treat any standing surface water, excavate and dispose of up to approximately 10,000 cy of soil from the holding cells, collect confirmation characterization soil samples of underlying soils after excavation and liner removal, install a new 10-mil thick geo-textile liner in each holding cell, replace approximately 10,000 cy of soil to rebuild the holding cells, install gravity flow concrete sumps in each holding cell, grade the backfilled soil, contour and revegetate the soil berms around each holding cell. Dennis Shepard
1/4/2023 Document, Report, or Work plan Review - other DEC provided comments for the Draft 2021 Biannual Groundwater Monitoring Report for Per and Polyfluoroalkyl Substances, Eielson Air Force Base, Moose Creek Alaska, dated December 2022. The report summarizes the groundwater monitoring activities conducted at Eielson Air Force Base (AFB) in Moose Creek, Alaska, during the spring and fall of 2021. The Air Force conducts biannual sampling, once in the spring and once in the fall, for 40 existing monitoring wells to further evaluate the perfluorooctanoic acid (PFOA)/perfluorooctane sulfonate acid (PFOS) groundwater contaminant plume within the boundary and northwest of Eielson AFB. Dennis Shepard
1/13/2023 Document, Report, or Work plan Review - other DEC provided comments for the Draft 2022 Moose Creek Land Use Controls Implementation Plan, Eielson Air Force Base, Alaska, dated November 2022. The United States Air Force (USAF) developed this Land Use Control Implementation Plan (LUCIP) for the restriction of groundwater use in Moose Creek, Alaska. This document describes the procedures for implementing the institutional controls required by the Interim Record of Decision (IROD), dated June 2019 (Air Force Civil Engineer Center [AFCEC], 2019). The LUCIP identifies land use controls (LUCs) on non-USAF-owned properties to restrict the use of groundwater within the Community of Moose Creek, located along the northern border of Eielson Air Force Base. Dennis Shepard
1/13/2023 Document, Report, or Work plan Review - other DEC provided preliminary review comments for the Draft Decision Document for Sites SS068, SS083, SS519, CS525, and CG527, Eielson Air Force Base, Alaska, dated November 2022. This Decision Document (DD) documents selection of and describes remedial actions for Sites SS068, SS083, SS519, CS525, and CG527 at Eielson Air Force Base (AFB), Alaska. The U.S. Air Force (USAF) is managing the remediation of contamination at these sites, associated with petroleum and petroleum-related compounds, in accordance with the State-Eielson Agreement (USAF 2014), referred to as the two-party agreement. Any Comprehensive Environmental Response, Compensation, and Liability Act (CERCLA) constituents remaining after remediation of the petroleum-related contamination will be addressed by transferring sites back to the Eielson Air Force Base, Federal Facility Agreement Under CERCLA Section 120 (USAF 1990), referred to as the three-party agreement. Dennis Shepard
1/17/2023 Document, Report, or Work plan Review - other DEC provided comments for the Draft Sampling and Analysis Plan, Repair Pump House at the Combined Heat and Power Plant Eielson Air Force Base, Alaska. The SAP describes design and construction of a new pump house near the Combined Heat and Power Plant at Eielson Air Force Base, Alaska. Due to the proximity of known contamination, field screening of excavated soils is required. Polyfluoroalkyl substances (PFAS) contaminated groundwater underlies the site and PFAS contamination is expected in smear zone soils and below the groundwater table. Dennis Shepard
1/19/2023 CERCLA Removal Action Report DEC provided approval for the Draft Final After Action Construction Report for a Time Critical Removal Action of Perfluorooctane Sulfonate (PFOS) and Perfluorooctanoic Acid (PFOA) Contaminated Drinking Water, Eielson Air Force Base, Alaska, dated January 2023. This report documents actions completed under the Action Memorandum for a Time Critical Removal Action (TCRA) of Perfluorooctane Sulfonate (PFOS) and Perfluorooctanoic Acid (PFOA) Contaminated Drinking Water, Eielson Air Force Base, Alaska, issued by the United States Air Force and signed 22 June 2017. The planned actions in the TCRA Action Memorandum were the installation of a permanent granular activated carbon (GAC) system at the Eielson water treatment plant and the excavation and disposal of up to 350 cubic yards of contaminated soil within the footprint of the permanent GAC system (USAF 2017). Dennis Shepard
1/30/2023 Document, Report, or Work plan Review - other The U.S. Environmental Protection Agency (EPA) and the Alaska Department of Environmental Conservation (DEC) approved the Final Phase II Source Evaluation Report for Sites DA112, SO113, SO114, SO115, SO116, SO117, SR109, SS110, TU105, TU106, TU108 at Eielson Air Force Base, Alaska (January 2023). The Phase II Source Evaluation Report (SER) identifies initial site characterization and the environmental conditions at 11 SER sites and provides a recommendation for each site assessing whether additional investigation is needed. Dennis Shepard
3/6/2023 Document, Report, or Work plan Review - other The Alaska Department of Environmental Conservation (DEC) and U.S. Environmental Protection Agency (EPA) approved the Technical Memorandum-Development of Background Threshold Values of Metals in Soil and Groundwater at Eielson Air Force Base, Fairbanks, Alaska (Final) dated February 28, 2023. This technical memorandum describes the methods used to calculate background threshold values (BTVs) for metals reported in soil and groundwater at Eielson Air Force Base. The BTV will be used as part of the remedial investigation process to help identify sites that have had releases of metals. Dennis Shepard
3/22/2023 Document, Report, or Work plan Review - other DEC provided backcheck and approval for the 2021 Annual Groundwater Monitoring Report for Per and Polyfluoroalkyl Substances, Eielson Air Force Base, Moose Creek Alaska, dated March 2023. The report summarizes the groundwater monitoring activities conducted at Eielson Air Force Base (AFB) in Moose Creek, Alaska, during the spring and fall of 2021. The Air Force conducts biannual sampling, once in the spring and once in the fall, for 40 existing monitoring wells to further evaluate the perfluorooctanoic acid (PFOA)/perfluorooctane sulfonate acid (PFOS) groundwater contaminant plume within the boundary and northwest of Eielson AFB. Dennis Shepard
4/17/2023 Document, Report, or Work plan Review - other DEC provided review comments for the Draft Quality Assurance Project Plan Addendum for Lysimeter Installation and Sampling, Eielson Air Force Base, Alaska. The draft QAPP addendum is submitted to support a study to quantify the attenuation/retention and leaching of per- and polyfluoroalkyl substances (PFAS) under simulated field conditions at Eielson Air Force Base (EAFB), Alaska. Dennis Shepard
4/26/2023 Document, Report, or Work plan Review - other DEC provided a backcheck and approval for the Final Closure Report EIE432 F-35 Aircraft Maintenance Unit Administration Facility Eielson Air Force Base, Alaska. The report summarizes the field screening, analytical sampling, excavation characterization, and stockpile characterization conducted for the 'EIE432 F-35 Aircraft Maintenance Unit Administration Facility' project. An estimated total of 1,504 cubic yards of suspected contaminated soils was excavated from the project area, segregated, stockpiled and sampled. Based on sampling results 719 cubic yards were determined to be contaminated and disposed of at Columbia Ridge Landfill located at 18177 Cedar Springs Lane, Arlington, OR 97812. Soil determined to be below DEC cleanup levels was reused on base in a location over the PFAS plume. Dennis Shepard
4/26/2023 CERCLA Remedial Action Completion Report DEC provided review comments for the Draft Remedial Action Completion Report for the Community of Moose Creek, Alaska, Long-Term Water Supply, Eielson Air Force Base, Alaska. The Remedial Action Completion Report documents the achievement of remedial action objectives and protectiveness associated with the Moose Creek Water Expansion Project. The report further describes the U.S. Air Force actions addressing PFAS-impacted groundwater used as drinking water in Moose Creek, Alaska in accordance with the Interim Record of Decision for Community of Moose Creek, Alaska, Long-Term Water Supply (I-ROD) (USAF, 2019). Dennis Shepard
5/1/2023 Document, Report, or Work plan Review - other The Alaska Department of Environmental Conservation (DEC) completed a review of the "Draft Field Sampling Report Repair Blackstart Generator Eielson Air Force Base, Alaska, February 2023" and provide initial comments. The report summarizes the field screening, analytical sampling, excavation characterization, and stockpile characterization conducted for the ‘FTQ 12-1012 Repair Blackstart Generator’ project. Axl LeVan
5/5/2023 Document, Report, or Work plan Review - other DEC provided comments for the Pre-Draft Pump House Upgrade E-11 Rail Offload Building 6261, Environmental Screening Report, Eielson Air Force Base, Alaska dated March 2023. The report provides a narrative of Pre-construction activities completed for the project, the analytical data collected along the excavation trenches for electrical installations, drip slab installation, and the excavated soil stockpile sampling results. Dennis Shepard
5/15/2023 CERCLA RI Plan Approved DEC provided approval for the Final Supplemental Remedial Investigation (RI) Work Plan (WP) Addendum, Eielson Air Force Base, Alaska, April 2023. The Supplemental RI WP Addendum describes the 2023 RI activities to be conducted at Eielson Air Force Base (AFB) to support the objectives of characterizing contamination in general accordance with the Comprehensive Environmental Response, Compensation, and Liability Act (CERCLA), and applicable state laws at 29 source areas within Operable Unit (OU) 1, OU2, OU4, and OU6 at Eielson AFB. This Supplemental RI WP Addendum complements the Supplemental Remedial Investigation Work Plan (USAF 2022a) and the Risk Assessment Work Plan (USAF 2016), which are the primary planning documents prepared to ensure that project goals and objectives are met. Dennis Shepard
5/15/2023 Document, Report, or Work plan Review - other DEC provided review comments for the Draft Uniform Federal Policy for Quality Assurance Project Plan PFAS Soil Washing Treatment, Eielson Air Force Base (EAFB), Alaska April 2023. Soil washing will be implemented to reduce concentrations of PFAS and other co-contaminants in soil stockpiles generated from construction activities at EAFB. The work will be performed in accordance with the Alaska Department of Environmental Conservation Title 18 Alaska Administrative Code (AAC) 75 (ADEC 2021) and other relevant federal, state, and local regulations. Dennis Shepard
5/18/2023 Document, Report, or Work plan Review - other DEC approved the Draft Final Quality Assurance Project Plan Addendum for Lysimeter Installation and Sampling, Eielson Air Force Base, Fairbanks North Star Borough, Alaska, dated May 2023. The Quality Assurance Project Plan addendum is submitted to support a study to quantify the attenuation/retention and leaching of per- and polyfluoroalkyl substances (PFAS) under simulated field conditions at Eielson Air Force Base (EAFB), Alaska. The study is conducted as part of the PFAS Remedial Investigation. Dennis Shepard
6/5/2023 Document, Report, or Work plan Review - other DEC approved the Final Uniform Federal Policy-Quality Assurance Project Plan, Environmental Construction and Services, Remedial Action – Construction LF003 Holding Cell Repair, United Air Force Civil Engineer Center dated May 2023. The plan provides details for activities to be performed at the Eielson Air Force Base (AFB) Landfill LF003 Contaminated Media Holding Cells 1 and 2 during the summer of 2023. Dennis Shepard
6/29/2023 Update or Other Action DEC contaminated Sites program received the Final Quality Assurance Project Plan Addendum for Lysimeter Installation and Sampling, Eielson Air Force Base, Fairbanks North Star Borough, Alaska, dated May 2023. Dennis Shepard
6/30/2023 Site Visit DEC conducted a site inspection at the Osborne Construction EIE 429 site. The inspection was undertaken to review the project dewatering infiltration basin and to verify it is constructed and functioning per the work plan and the dewatering permit/best management practices. Overall, the basin seems to be allowing infiltration and is keeping up with the rate of pumping (1400 gal/min). Sampling for PFAS on a weekly frequency is occurring per the approved plan. Dennis Shepard
8/7/2023 Document, Report, or Work plan Review - other DEC provide approval for the Final Uniform Federal Policy for Quality Assurance Project Plan PFAS Soil Washing Treatment, Eielson Air Force Base, Alaska July 2023. The document describes the approach used by Brice Engineering, LLC for the Per- and Polyfluoroalkyl Substances (PFAS) Soil Washing Treatment project at Eielson Air Force Base (EAFB). Soil washing will be implemented to reduce concentrations of PFAS and other co-contaminants in soil stockpiles generated from construction activities at EAFB. The work will be performed in accordance with the Alaska Department of Environmental Conservation Title 18 Alaska Administrative Code (AAC) 75 (ADEC 2021) and other relevant federal, state, and local regulations. Dennis Shepard
8/17/2023 Document, Report, or Work plan Review - other DEC reviewed and provided comments on the "Draft Work Plan for Utilization of Fate and Transport Modeling to Derive Site-Specific Soil Screening Criteria for PFAS-Impacted Vadose Zones, Eielson Air Force Base, Alaska, July 2023". The work plan outlines the modeling approach to be used at Eielson as a part of the Phase I Remedial Investigation for PFAS at Various Sites at Eielson Air Force Base. Axl LeVan
10/24/2023 Document, Report, or Work plan Review - other DEC received the Final Revision 3 Work Plan for the Utilization of Fate and Transport Modeling to Derive Site Specific Soil Screening Criteria for PFAS-Impacted Vadose Zones, Dated October 2023. The work plan outlines the modeling approach to be used at Eielson as a part of the Phase I Remedial Investigation for PFAS at Various Sites at Eielson Air Force Base. Dennis Shepard
11/2/2023 Document, Report, or Work plan Review - other DEC reviewed and provided a single comment on the "Repair Building 3242 Letter Workplan Addendum to the Generic Sample and Analysis Plan for Projects with no Known Contamination (revised 13, October 2021).". The addendum provided specific construction processes to be followed in conducting a renovation to building 3242. Axl LeVan
11/8/2023 Document, Report, or Work plan Review - other DEC reviewed and approved the "Final Exploration Phase – Sampling and Analysis Plan, Mike Apron and Lima Row Airfield Pavement Repairs, Alaska, November 2023". The work plan describes the proposed approach for pre-construction environmental sampling during a planned geotechnical investigation. Axl LeVan
11/9/2023 Document, Report, or Work plan Review - other DEC reviewed response to comments for "Draft Report, Disposal of PFAS Impacted Soil Stockpiles, EIE377, EIE379, EIE385, EIE388, and EIE389, Eielson Air Force Base, Alaska, September, 2023". DEC approved the comments and requested a final version for approval. Axl LeVan
11/9/2023 Document, Report, or Work plan Review - other DEC reviewed and approved the "Final Work Plan for Utilization of Fate and Transport Modeling to Derive Site-Specific Soil Screening Criteria for PFAS-Impacted Vadose Zones, Eielson Air Force Base, Alaska, October 2023". This work plan outlines the modeling approach to be use at Eielson as part of the Phase I PFAS Remedial Investigation. Axl LeVan
12/4/2023 Document, Report, or Work plan Review - other DEC reviewed and approved the "Final Report, Disposal of PFAS Impacted Soil Stockpiles, EIE377, EIE379, EIE385, EIE388, and EIE389, Eielson Air Force Base, Alaska, November, 2023". The report describes the process that was used to containerize, transport, and dispose of 11,000 cubic yards of previously excavated poly-and perfluoroalkyl substances (PFAS) impacted soil which were stockpiled at Eielson Air Force Base (AFB), Alaska. Axl LeVan
3/8/2024 Document, Report, or Work plan Review - other DEC reviewed and provided comments to the Air Force on the "Draft Per – and Polyfluoroalkyl Substances (PFAS) Plume Monitoring Uniform Federal Policy – Quality Assurance Project Plan, Eielson Air Force Base, Alaska, February 2024". Axl LeVan
3/14/2024 Document, Report, or Work plan Review - other DEC reviewed and provided comments on the "Draft Quality Assurance Project Plan Addendum, Tempe Cell Method for Per- and Polyfluoroalkyl Substances (PFAS) Leaching, Eielson Air Force Base, Alaska, February 2024". The plan outlines the implementation of the Tempe cell method for PFAS leaching. The project goal is to develop and validate a leaching method using Tempe cells. Axl LeVan
4/22/2024 Document, Report, or Work plan Review - other DEC reviewed and approved the "Quality Assurance Project Plan Addendum, Tempe Cell Method for Per- and Polyfluoroalkyl Substances (PFAS) Leaching, Eielson Air Force Base, Alaska, April 2024". The plan outlines the implementation of the Tempe cell method for PFAS leaching investigations. The project goal is to develop and validate a leaching method using Tempe cells. Axl LeVan
5/2/2024 Document, Report, or Work plan Review - other DEC reviewed and approved comments on the "Draft-Final Data Gap Investigation & Groundwater Pilot Study Construction in Support of the Groundwater Response Action for PFAS Treatment at Site FT009P, Eielson Air Force Base, Alaska, January 2024". The plan outlines the first portions of a pilot study investigation for PFAS treatment by a Colloidal Activated Carbon curtain. Axl LeVan
5/3/2024 Document, Report, or Work plan Review - other DEC reviewed and provided comments on the "Draft 2024 Environmental Restoration Program Atlas, United States Air Force, Eielson Air Force Base, Alaska, March 2024." Axl LeVan
5/10/2024 Document, Report, or Work plan Review - other DEC reviewed and provided comments on the "DRAFT 2023 End of Season Technical Memorandum Treatment and Disposal of PFAS-Contaminated Soil Stockpiles, Eielson Air Force Base, Alaska, March 2024." report documents the work performed in the 2023 Field Season and the progress towards soil stockpile cleanup. The document also describes an amendment to the approaches being used for soil washing. Axl LeVan
5/17/2024 Document, Report, or Work plan Review - other DEC reviewed and provided comments on the "Draft Eielson Air Force Base Uniform Federal Policy Quality Assurance Project Plan Addendum PFAS Fingerprinting and Background Study, Eielson Air Force Base, Alaska, April 2024." This document is an addendum to a programmatic UFP-QAPP to discriminate among potential aqueous film forming foam (AFFF) and other PFAS sources and evaluate the anthropogenic background PFAS concentrations. Axl LeVan
6/19/2024 Document, Report, or Work plan Review - other DEC reviewed and provided comments on the "Draft 2023 Annual Groundwater Monitoring Report for, Eielson Air Force Base Per – and Polyfluoroalkyl Substances (PFAS), Alaska, May 2024". This report summarizes the groundwater monitoring activities conducted at Eielson Air Force Base (AFB) and in Moose Creek, Alaska, during the spring and fall of 2023. The review is focused on 80 existing monitoring wells with evaluation of per – and polyfluoroalkyl substances over time. Axl LeVan
7/8/2024 Document, Report, or Work plan Review - other DEC reviewed and approved the 80 Well PFAS Monitoring Work Plan. The work plan outlined the methods for sampling at Eielson and downstream monitoring wells to monitor the current status of the plume. Axl LeVan
8/1/2024 Document, Report, or Work plan Review - other DEC reviewed and approved the "Final Eielson Air Force Base Uniform Federal Policy Quality Assurance Project Plan Addendum PFAS Fingerprinting and Background Study, Eielson Air Force Base, Alaska, July 2024". As this is a non-CERCLA document and all DEC comments concerning soil management and the need for a workplan within a contaminated site were addressed DEC approved the document. Axl LeVan
8/11/2024 Document, Report, or Work plan Review - other DEC reviewed and approved the "Draft-Final 2023 Annual Groundwater Monitoring Report for, Eielson Air Force Base Per – and Polyfluoroalkyl Substances (PFAS), Alaska, October 2024". This report summarizes the groundwater monitoring activities conducted at Eielson Air Force Base (AFB) and in Moose Creek, Alaska, during the spring and fall of 2023. Axl LeVan
9/12/2024 Document, Report, or Work plan Review - other DEC reviewed and provided comments on the "Draft Interim Phase I Remedial Investigation Data Report for PFAS at Various Sites Eielson Air Force Base, Alaska, April 2024." The report describes field activities conducted between 2020 and 2022 and summarizes analytical results for multi-media samples collected as part of the Phase I RI for per- and polyfluoroalkyl substances (PFAS) at multiple sites at Eielson Air Force Base. Axl LeVan
9/27/2024 Document, Report, or Work plan Review - other DEC reviewed and provided comments on the "Draft Explanation of Significant Differences for the Interim Record of Decision for Community of Moose Creek, Alaska Long-Term Water Supply, Eielson Air Force Base, Alaska, April 2024". Axl LeVan
10/4/2024 Document, Report, or Work plan Review - other DEC reviewed and approved the "Final 2023 End of Season Technical Memorandum Treatment and Disposal of PFAS-Contaminated Soil Stockpiles, Eielson Air Force Base, Alaska, October 2024". The report documents the work performed in the 2023 Field Season and the progress towards soil stockpile cleanup. Axl LeVan
10/9/2024 Document, Report, or Work plan Review - other DEC reviewed response to comments on the "Draft-Final Programmatic Uniform Federal Policy - Quality Assurance Project Plan for Construction Projects at Contaminated Sites, Eielson Air Force Base, Alaska, October 2024". The work plan is intended for use by contractors performing construction work within known contaminated sites at Eielson Air Force Base. Axl LeVan
10/11/2024 Document, Report, or Work plan Review - other DEC reviewed and approved the "Draft-Final 2023 Annual Groundwater Monitoring Report for, Eielson Air Force Base Per – and Polyfluoroalkyl Substances (PFAS), Alaska, October 2024". This report summarizes the groundwater monitoring activities conducted at Eielson Air Force Base (AFB) and in Moose Creek, Alaska, during the spring and fall of 2023. Axl LeVan
11/1/2024 Document, Report, or Work plan Review - other DEC reviewed and approved the "Draft-Final Groundwater Model Update Summary and Quality Report, Eielson Air Force Base, Alaska, October 2024" based on updates to the document. The objective of the overall project is to update the existing base wide groundwater flow model. This Report describes the updates to the conceptual model; the numerical groundwater hydrology model; the groundwater flow model calibration; the PFAS fate and transport model calibration; and use of the model for predictive fate and transport simulations. Axl LeVan
11/1/2024 Document, Report, or Work plan Review - other DEC reviewed and approved the "Draft-Final Groundwater Model Update Summary and Quality Report, Eielson Air Force Base, Alaska, October 2024". The objective of the overall project is to update the existing base wide groundwater flow model. Axl LeVan
12/2/2024 Document, Report, or Work plan Review - other DEC reviewed and approved the Moose Creek Explanation of Significant Differences (ESD). The ESD documents significant changes to the remedy identified in the 2019 Interim Record of Decision (I-ROD) for Community of Moose Creek, Alaska. Axl LeVan
12/20/2024 Document, Report, or Work plan Review - other DEC reviewed and approved the "Draft-Final Interim Phase I Remedial Investigation Data Report for PFAS at Various Sites Eielson Air Force Base, Alaska, December 2024" based on updated responses to DEC comments. Axl LeVan

Contaminant Information

Name Level Description Media Comments

Control Type

Type Details

Requirements

Description Details
Hazard ID Site Name File Number
27811 Eielson AFB SS110 107.38.184
27809 Eielson AFB SR109 107.38.182

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State of Alaska Department of Environmental Conservation

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Juneau, AK 99811-1800
Phone: 907-465-5066
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