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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: Dennis Shepard, 9074512180 dennis.shepard@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.

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 Report or Workplan 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
4/12/2019 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 Report or Workplan 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

Contaminant Information

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