| Action Date |
Action |
Description |
DEC Staff |
| 6/30/2015 |
Update or Other Action |
EPA and DEC issued joint review comments on the "Draft Preliminary Assessment Report for Perfluorinated Compounds at Eielson Air Force Base, Alaska (PA)" dated May 2015. This document identified the former fire training areas near the antenna farm and entomology building (FT092) as possible source areas for perfluorinated compound releases. |
Melinda Brunner |
| 11/24/2015 |
CERCLA PA |
The U.S. Air Force (USAF) submitted a Phase 1 Source Evaluation Report (SER) for FT092 to DEC and EPA in accordance with Paragraph 8.6 of the Eielson Federal Facility Agreement. The SER describes interviews with Eielson AFB personnel in which FT092 was identified as a former fire training area. The USAF SER transmittal letter states that the USAF intends to proceed with the investigation/cleanup of the site under CERCLA, and that the site is programmed for a site inspection in FY16. |
Melinda Brunner |
| 12/10/2015 |
Update or Other Action |
DEC and EPA sent a joint letter to the USAF confirming receipt of the Phase 1 Source Evaluation Report submitted for FT092 on 11/24/2015. DEC and EPA concurred with the USAF's proposed plan to investigate/cleanup the site in accordance with CERCLA. |
Melinda Brunner |
| 2/5/2016 |
Site Added to Database |
A new site has been added to the database |
Mitzi Read |
| 10/17/2016 |
Site Characterization Workplan Approved |
DEC approved the 2016 Source Evaluation Work Plan for Source Areas FT092 and DD097. The WP describes proposed surface soil, subsurface soil and groundwater sampling at Source Areas FT092 and DD097 to assess the potential presence of contamination. |
Monte Garroutte |
| 1/12/2017 |
Document, Report, or Work plan Review - other |
DEC reviewed and provided comments on the 2016 Source Evaluation Report for Source Areas FT092 and DD097. |
John O'Brien |
| 5/25/2017 |
CERCLA RI Plan Approved |
DEC and EPA Approval of the Remedial Investigation Work Plan for Source Areas FT092 and DD097, Eielson Air Force Base, Alaska |
Monte Garroutte |
| 8/10/2018 |
Institutional Control Periodic Reporting |
DEC and EPA reviewed the "Installation-Wide Monitoring Program 2017 Groundwater Monitoring Program" for Eielson Air Force Base, Alaska dated March 2018 and issued comments. |
Bri Clark |
| 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 |
| 9/24/2018 |
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 |
| 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 |
| 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 |
| 7/12/2019 |
CERCLA RI Report Approved |
The U.S. Environmental Protection Agency (EPA) and Alaska Department of Environmental
Conservation (DEC)approved the Final Remedial Investigation / Risk Assessment
Report for Source Areas FT092 and DD097, Eielson Air Force Base, Alaska (June 2019). |
Dennis Shepard |
| 1/29/2021 |
Document, Report, or Work plan Review - other |
DEC received the draft Remedial Investigation/ Feasibility Study Interim Data Report and Work Plan Addendum for Source Areas SS062 and SS067, Eielson Air Force Base. The document is a combined Interim data report for samples collected in 2019, and a work plan addendum to the 2019 Remedial Investigation/ Feasibility Study Management Plan. |
Dennis Shepard |
| 6/3/2022 |
Offsite Soil or Groundwater Disposal Approved |
DEC approved out of state transport of metals and pesticide contaminated investigation derived waste generated during remedial investigation of the Garrison Slough. |
Dennis Shepard |
| 8/29/2022 |
Document, Report, or Work plan Review - other |
DEC reviewed and approved revisions to the risk assessment scenarios and reaches (Eco exposure areas) that were proposed by the Air Force. The change revised the Eco exposure areas/ reaches from 5 separate areas to only 3 areas based on contaminants and land use. |
Dennis Shepard |
| 1/13/2025 |
Document, Report, or Work plan Review - other |
DEC provided comments on Volume I and II of the Garrison Slough Remedial Investigation/Risk Assessment reports. Volume I focused on SS062 and included evaluation of human health and ecological risk assessments. Volume II focused on Source Area SS067 which is a small portion of Garrison Slough. |
Axl LeVan |
| 7/18/2025 |
Document, Report, or Work plan Review - other |
DEC staff reviewed and approved the Final EIE424 Garrison Slough Bridge Combined Field Closure Report, Eielson Air Force Base, Alaska, April 2025. This was a non-CERCLA construction project taking place on Eielson Air Force Base. The work for EIE424 consisted of demolishing the existing Garrison Slough Railroad Bridge, demolishing areas of Arctic Avenue as necessary to construct a culvert system, install the culvert system to allow Garrison Slough to flow freely, join the existing railroad tracks on either side of the bridge to new tracks spanning the culvert system, and to repave areas of Arctic Avenue as necessary. All soil encountered was assumed to be contaminated, and is currently in 4 stockpiles that have all had analytical results that indicate contamination. Contamination that remains onsite include: PFOS, Arsnic, DRO, RRO, and Naphthalene. |
Matthew Fleetwood |
| 8/26/2025 |
Meeting or Teleconference Held |
DEC staff attended the Eielson Air Force Base Remedial Project Managers’ Monthly Meeting on this date and August 27, 2025. Agenda topics included updates on all ongoing three-party CERCLA and two-party work, a PFAS update, PFAS plume coordination regarding North Pole, a presentation on Stabilizing AFFF-impacted soils, and a discussion on adjusting LUC buffers for 2 Party Sites. |
Matthew Fleetwood |
| 9/5/2025 |
Offsite Soil or Groundwater Disposal Approved |
DEC approved the transport of 115 pounds of soil cuttings generated 4/15-16/2025 from soil sampling activities to identify potential soil contamination along the proposed alignments (Utilidor G and H) on Eielson AFB. Contaminants of concern at the sites sampled include PFAS, chlorinated solvents, fuels, pesticides, PCBs, RCRA metals. Waste will be transported to the Republic Services Grand View Facility in Idaho. Soil came from these Eielson sites: SS314P, SS303P, ST058, SS061, SS064, SS062, SS085, SS107, SD021, SS41, FT092P, and SS037. |
Sarah Bernhardt |
| 11/26/2025 |
Long Term Monitoring Workplan or Report Review |
On this date DEC approved the Final 2024 Institutional Controls/Land Use Controls Annual Report, Eielson Air Force Base, Alaska, November 2025. During 2024 twelve sites had boundary updates (SO066, CS074, SO075, SS078, SS079, CS082, SO501, SO503, SO504, CG505, MY512, MY518, CG527, MY529, SS530, TU531). |
Sarah Bernhardt |
| 12/1/2025 |
Document, Report, or Work plan Review - other |
DEC approved the Final 2025 Environmental Restoration Program Atlas, Eielson Air Force Base, AK, November 2025 on this date. The goal of the document is to present the Land Use Controls for the source areas at Eielson Air Force Base. The figures in the Atlas provide the Decision Document (DD) 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. The Restoration Atlas is required per the Institutional Control/Land Use Controls (IC/LUC) Settlement Agreement signed April 15, 2013. The Atlas was issued for the first time in 2017 and is updated annually. |
Sarah Bernhardt |
| 1/28/2026 |
Meeting or Teleconference Held |
The Eielson Air Force Base, Alaska Remedial Project Managers’ (RPMs) Monthly Meeting took place virtually 27-28 January, 2026. Updates included: North Pole PFAS Public Involvement Planning coordinate, general PFAS investigation updates, site progress for CERCLA and petroleum only sites, upcoming OU Supplemental Risk Investigations, and remedial investigation documents currently under review. This site was discussed during the meeting. |
Sarah Bernhardt |
