| Action Date |
Action |
Description |
DEC Staff |
| 9/16/1994 |
Update or Other Action |
Reviewed and updated file. |
Jackie Dupee |
| 9/22/1994 |
Update or Other Action |
(Old R:Base Action Code = CORR - Correspondence (General)). Sent letter to Cindy Hood approving waiver for sampling requirements. |
Jackie Dupee |
| 9/28/1994 |
Site Added to Database |
Eielson AFB, Building 1176. File# 107.26.023. |
Jackie Dupee |
| 10/19/1994 |
Site Closure Approved |
Cleanup activities have met state requirements. Quarterly monitoring well results for the past year have shown acceptable levels of BTEX. No further action necessary on this site. |
Jackie Dupee |
| 7/6/2006 |
Update or Other Action |
ADEC agreed to decrease sampling of the North Boundary Wells from annual sampling to biennial. Upcoming measurements will be summer 2007, 2009, 2011, etc. Concentrations of VOCs, SVOCs, and metals in the sentinel wells have been monitored annually since 1992 and there has been no detection of contamination. |
Emily Youcha |
| 5/28/2021 |
Leaking Underground Storage Tank Release Confirmed - Petroleum |
LUST site created in CSP database for source area auto-generated pm edit Eielson AFB Bldg. 1176, 73309 |
Cascade Galasso-Irish |
| 5/28/2021 |
Site Reopened |
Three USTs were present at the site historically: one 1,000-gallon UST that held jet propellant-4 jet fuel; one 1,000-gallon UST that held unleaded gasoline; and one 5,000-gallon UST that held diesel. Contamination was discovered during tank upgrades in 1994, when 9 cy of soil was excavated from the three tank locations to a depth of 5 ft bgs. Surface soil, subsurface soil, and stockpile samples were analyzed for headspace results for DRO, GRO and BTEX. GRO exceeded ADEC CULs. Records indicate that contamination remained in place at concentrations exceeding ADEC cleanup levels. The cause of the releases are reportedly leaking USTs, multiple historic spills at the site, and overflows.
A there is no evidence that sampling was performed for lead, although leaded gasoline is thought to have been stored at the site at one time. The tanks are currently still in service at the site storing JP-8. In 2013, the ADEC Contaminated Sites Program determined that closure was incomplete, and the ADEC and EPA RPMs requested that the site be investigated. The site does not have closure letter, nor report as to how contaminated soils were remediated. Closure appears to be incomplete or never initiated, though site was generally and improperly considered to have been closed. The site has active LUCs/ICs that requires prior approval to work at the site and/or disturb soil, and soil and groundwater use restrictions. The site is currently slated for a Phase II Source Evaluation in 2021. |
Cascade Galasso-Irish |
| 7/8/2022 |
Risk Assessment Report Approved |
The Alaska Department of Environmental Conservation (DEC) has completed a review of the Draft Phase II Source Evaluation Report for Sites DA112, S0113SO114, SO115, SO116, SO117, SR109, SS110, TU105, TU106, TU108 at Eielson Air Force Base, Alaska (May 2022). DEC provided comments for the Air Force on July 7, 2022. The Phase II SER report identifies initial site characterization and the environmental conditions at 11 SER sites and provide an outcome recommendation for each site. |
Axl LeVan |
| 9/30/2022 |
Leaking Underground Storage Tank Cleanup Initiated - Petroleum |
This action addition is for grant reporting purposes. |
Evonne Reese |
| 1/19/2023 |
Document, Report, or Work plan Review - other |
DEC received and approved the Final Phase II Source Evaluations Report for sites: DA112, SO113, SO114, SO115, SO116, SO117, SR109, SS110, TU105, TU106, TU108, Eielson Air Force Base, Alaska, January 2023. |
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 |
| 9/1/2023 |
CERCLA RI Plan Approved |
DEC reviewed and approved of the "Draft-Final Work Plan Remedial Investigation for 11 Sites DA112, SO113, SO114, SO115, SO116, SO117, SR109, SS107, SS110, TU105, TU108 Eielson Air Force Base, Alaska (June 2023)". The work plan details environmental characterization and delineation activities to be performed at the 11 identified sites (DA112, SO113, S0114, SO115, SO116, SO117, SR109, SS107, SS110, TU105, and TU108) at Eielson AFB, Alaska. |
Axl LeVan |
| 5/10/2024 |
Document, Report, or Work plan Review - other |
DEC reviewed and provided comments on the "Draft Work Plan Addendum Remedial Investigation and Risk Assessment for 11 Sites DA112, SO113, SO114, SO115, SO116, SO117, SR109, SS107, SS110, TU105, TU108 Eielson Air Force Base, Alaska, April 2024". The draft addendum updates the approved remedial investigation plan for the 2024 field season based on 2023 data. |
Axl LeVan |
| 5/16/2024 |
Document, Report, or Work plan Review - other |
DEC reviewed and provided comments on the "Draft Risk Assessment Work Plan Remedial Investigation and Risk Assessment for 11 Sites DA112, SO113, SO114, SO115, SO116, SO117, SR109, SS107, SS110, TU105, TU108 Eielson Air Force Base, Alaska, April 2024." The work plan describes the human health risk assessment (HHRA) and the ecological risk assessment (ERA) methods and parameters that will be used to support the Remedial Investigation and Risk Assessment for 11 Sites at Eielson AFB project. |
Axl LeVan |
| 7/9/2024 |
CERCLA RI Plan Approved |
DEC reviewed and approved "Work Plan Addendum Remedial Investigation and Risk Assessment for 11 Sites DA112, SO113, SO114, SO115, SO116, SO117, SR109, SS107, SS110, TU105, TU108 Eielson Air Force Base, Alaska, June 2024." The work plan details update environmental characterization and delineation activities to be performed at the 11 identified sites. The investigation approach and the data collection methods are also described. |
Axl LeVan |
| 5/1/2025 |
Document, Report, or Work plan Review - other |
On this date DEC provided comments on the Draft 2024 Institutional Controls/Land Use Controls Annual Report, Eielson Air Force Base, AK, March 2025 and Draft 2025 Environmental Restoration Program Atlas, Eielson Air Force Base, AK, March 2025. |
Sarah Bernhardt |
| 6/6/2025 |
Risk Assessment Workplan Approved |
DEC approved the Final Risk Assessment Work Plan Remedial Investigations and Risk Assessment for 11 Sites: DA112, SO113, S0114, SO115, SO116, SO117, SR109, SS107, SS110, TU105, and TU108; Eielson Air Force Base, Alaska, dated June 2025, on this date. This Baseline Risk Assessment (BRA) Work Plan describes the human health risk assessment (HHRA) and the ecological risk assessment (ERA) methods and parameters that will be used to support the Remedial Investigation and Risk Assessment for 11 Sites at Eielson Air Force Base (AFB) project. |
Sarah Bernhardt |
| 8/20/2025 |
Offsite Soil or Groundwater Disposal Approved |
On this date DEC signed a Contaminated Media Transport and Treatment or Disposal Approval Form for transport of 1 cubic yard supersack of drill cuttings related to the Final Risk Assessment Work Plan Remedial Investigations and Risk Assessment for 11 Sites: DA112, SO113, S0114, SO115, SO116, SO117, SR109, SS107, SS110, TU105, and TU108; Eielson Air Force Base, Alaska. The waste will be transported for disposal at the Republic Services Roosevelt Municipal SW Landfill, Roosevelt, WA. Waste exceeded Project Action Limits for the following analytes: metals, PFOS, pesticides, PAHs, GRO, DRO, VOCs and PCBs. The waste was generated in September 2023 and August 2024. |
Sarah Bernhardt |
| 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 |
| 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 |
