Site Report: ADOT&PF Homer Airport Sitewide PFAS
| Site Name: | ADOT&PF Homer Airport Sitewide PFAS |
|---|---|
| Address: | 2320 Kachemak Drive; Homer Airport, Homer, AK 99603 |
| File Number: | 2314.38.042 |
| Hazard ID: | 27309 |
| Status: | Active |
| Staff: | Shawn Tisdell, 9074512752 shawn.tisdell@alaska.gov |
| Latitude: | 59.643100 |
| Longitude: | -151.478200 |
| Horizontal Datum: |
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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
Site characterization activities were conducted in 2021 to evaluate per- and poly-fluoroalkyl substances (PFAS) at the Alaska Department of Transportation and Public Facilities (ADOT&PF) Homer Airport (HOM). Potential sources of PFAS at the HOM facility include fire training activities using aqueous film forming foam (AFFF). Fire training activities were likely conducted twice per year since the 1970s at two AFFF training areas and at least once per year at various locations along the airport runways. There are no known emergency response incidents where AFFF use was documented. The precise timeline and locations of AFFF use are unknown.
Action Information
| Action Date | Action | Description | DEC Staff |
|---|---|---|---|
| 3/3/2021 | Site Added to Database | A new site has been added to the database | Mitzi Read |
| 3/23/2021 | Site Characterization Workplan Approved | DEC staff reviewed and approved 3/2021 Revised DOT&PF Stateside PFAS Addendum 004-HOM-01 Initial Site Characterization work plan. Scope for this plan includes: Conducting a limited water supply well search to confirm city water is the source of drinking water near and downgradient of the Homer Airport(HOM) and sample identified water supply wells. Collecting PFAS analytical surface and subsurface soil samples from near the HOM runways, potential AFFF release areas and/or major draining ditches, installing and sampling from temporary well points, and collecting and sampling surface water and sediments from Lampert Lake and Beluga Lake. These site characterization activities are scheduled for the Summer of 2021. | Shawn Tisdell |
| 7/12/2021 | Document, Report, or Work plan Review - other | Results from 6/18/2021 water supply well sampling event indicate 3 wells along Kachemak Drive were sampled for PFAS+18 using EPA 537.1 for drinking water. No samples exceeded the 70 parts per trillion EPA Lifetime Health Advisory limit. Well DW-1 was located approximately 2500 feet east of the north end of the HOM airport runway and did not have any detectable levels of PFAS. Wells DW-2 and DW-3 were located approximately 1500 feet East of Lampert Lake. Well DW-2 did not have detectable levels of PFAS compounds, however DW-3 had estimated concentrations (J-flagged) of PFHxS (0.76J ppt)and PFOA (0.52J ppt). PFBS was observed at 2.4 ppt. | Shawn Tisdell |
| 10/22/2021 | Meeting or Teleconference Held | Improvements are being proposed by the Alaska Department of Transportation and Public Facilities (DOT&PF) for the runway, taxiway and apron at the Homer Airport potentially starting in later 2022. A planning meeting was held between DOT&PF and the Alaska Department of Environmental Conservation(DEC) to discuss management of materials potentially impacted by contaminants such as PFAS during and following the construction project. DEC recommended that DOT&PF prepare a Construction Materials Management Plan that the DEC could review and comment on. This will assist both Departments to safely manage and minimize risk associated with contaminants that may be encountered. | Shawn Tisdell |
| 1/28/2022 | Meeting or Teleconference Held | Coordination meeting between DEC (CS and Division of Water) to discuss initial review of the 11/2021 Initial Site Characterization Draft Summary Report (SCR) and requirements for a preliminary Construction Materials Management Plan (CMMP). | Shawn Tisdell |
| 1/28/2022 | Meeting or Teleconference Held | Coordination meeting between DEC (CS and Division of Water) to discuss initial review of the 11/2021 Initial Site Characterization Draft Summary Report (SCR) and requirements for a preliminary Construction Materials Management Plan (CMMP). | Shawn Tisdell |
| 3/23/2022 | Meeting or Teleconference Held | Met with consultant and DOT to discuss 3/2022 Field Sampling Work Plan that was submitted to the ADEC in preparation for developing a materials management plan for the Homer Airport Improvements project. Sampling locations were proposed near historical releases of aqueous film forming foam (AFFF) had been reported and where PFAS and petroleum hydrocarbons had been detected above ADEC cleanup levels following a 6/2021 Initial Site Characterization sampling event. Incremental sampling from decision units as well as discrete sampling was discussed. It was decided that another work plan would be prepared with only discrete sampling. | Shawn Tisdell |
| 7/27/2022 | Site Characterization Report Approved | Initial site characterization activities were conducted in June 2021 at and near to the Homer Airport (HOM). The objective of this effort was to understand the extent of per- and polyfluoroalkyl substances (PFAS) contamination resulting from the historic use of aqueous film forming foam (AFFF)by the DOT&PF at the HOM. Soil, sediments, surface water, and groundwater was sampled. PFOS and PFOA were detected ins surface soil above cleanup levels (CUL) near several historical AFFF training and testing areas. DRO and RRO was also detected above CULs near one of these areas. Further site characterization is recommended to delineate the vertical and horizontal extent of PFAS and petroleum analytes at the airport. This report has been added to this database. | Shawn Tisdell |
| 12/14/2022 | Document, Report, or Work plan Review - other | A December 2022 Construction and Materials Management Plan has been approved. This plan detailed the locations where improvement work is proposed at the Homer Airport and identified strategies to manage and minimize exposure risk of soil contaminated with PFAS and/or petroleum chemicals. Wherever possible, known areas of contaminated soil were avoided. When necessary, contaminated soil will be excavated and then replaced in the approximate location where it came. | Shawn Tisdell |
Contaminant Information
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Control Type
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Requirements
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No associated sites were found.