| Action Date |
Action |
Description |
DEC Staff |
| 10/3/2016 |
Update or Other Action |
DEC received analytical results for perfluorooctanoic acid (PFOA) and perfluorooctanesulfonic acid (PFOS) sampling in Polaris Lake following an Aqueous Film Forming Foam (AFFF) release. Sample results were taken from the top, middle, and bottom sections of the Polaris Lake water column. The results for the top section of the water column are 16.6 parts per trillion (ppt) PFOA and 249 ppt PFOS. The results for the middle section of the water column are 18.5 ppt PFOA and 183 ppt PFOS. The results for the bottom section of the water column are 19.0 ppt PFOA and 85.4 ppt PFOS. Soil surrounding Polaris lake was also sampled for PFOA and PFOS did not have a detection. |
Bri Clark |
| 10/11/2016 |
Spill Transferred from Prevention Preparedness and Response Program |
Spill transferred by PPR staff Kelley Tu. Spill no. 16309922401; substance = Aqueous Film Forming Foam (AFFF) concentrate; quantity = 0.25 gallons; source = fire suppression system; contaminant released to surface water body (Polaris Lake) and adjacent shoreline; PPR file no. 107.02.004. |
Mitzi Read |
| 11/3/2016 |
Site Added to Database |
A new site has been added to the database |
Mitzi Read |
| 3/1/2019 |
Exposure Tracking Model Ranking |
Initial ranking with ETM completed for source area id: 79983 name: Eielson AFB Polaris Lake AFFF |
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 |
| 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 |
| 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 |
| 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 |
| 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 |
| 4/27/2021 |
Exposure Tracking Model Ranking |
A new updated ranking with ETM has been completed for source area 79983 Eielson AFB Polaris Lake AFFF. |
Cascade Galasso-Irish |
| 2/9/2022 |
Public Notice |
The Alaska Department of Fish and Game (ADF&G) is continuing restrictions due to PFAS contamination at Kimberly, Bear, Moose, and Polaris Lakes, Bathing Beauty Pond, Piledriver Slough, and Moose Creek, effective 12:01 a.m. Friday, February 11, 2022 and extending through April 30, 2023. Sport fishing is restricted to catch-and-release only; all fish species caught may not be retained and must be released immediately. |
Dennis Shepard |
| 4/11/2022 |
Document, Report, or Work plan Review - other |
On April 11, 2022 DEC received surface water sampling results for the Polaris Lake to assess current PFOS and PFOA concentrations. Samples were collected on April 1, 2022 and indicated PFOS + PFOA are present in concentrations above the EPA LHA of 0.07 ng/L, with the highest detected concentration PFOS + PFOA = 70ng/L + 11 ng/L = 81 ng/L. The current results are less than the results from the 2016 initial release investigation sampling that showed a PFOS concentration of 249 ng/L. |
Dennis Shepard |
