Site Report: FAA Aniak Bldg. 200 POL Releases
| Site Name: | FAA Aniak Bldg. 200 POL Releases |
|---|---|
| Address: | Aniak Airport, Aniak, AK 99557 |
| File Number: | 2404.38.001 |
| Hazard ID: | 1579 |
| Status: | Cleanup Complete |
| Staff: | No Longer Assigned, 9074655229 dec.icunit@alaska.gov |
| Latitude: | 61.575559 |
| Longitude: | -159.526638 |
| Horizontal Datum: | NAD83 |
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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
Surface soil in a fairly localized area on the east side of Building 200 was contaminated with gasoline, diesel and residual range petroleum hydrocarbons and lead potentially from drums stored at the site prior to the 1994 Interim Cleanup Action, possible overfills of a 500 gallon diesel underground heating oil tank removed in 1990, and potential overfills to a gasoline and diesel aboveground storage tanks . No evidence that groundwater has been contaminated. Contamination was reported to the department in the 1992 ECIR. Further site characterization is documented in the 1994 SCIR, and removal actions are documented in the 1996 Final Remedial Action Report. The ECIR defines an FAA station as a series of facilities and sites initially established by FAA for use in support of air navigation, therefore, the site number for the Aniak station includes diverse facilities and properties, which may be currently owned and/or operated by FAA. The station is located within the boundaries of the Yukon Delta National Wildlife Refuge. Groundwater occurs near the Aniak FAA station at depths of 15 to 30' below ground surface within the unconsolidated near-surface sediments alluvial aquifer. Records show that the three wells at the station have reported water encountered at 26 and 32' below ground surface. There are at least 40 private wells located within 2 miles of the Aniak FAA station, with well depths ranging from 25 to 30' below ground surface.
Action Information
| Action Date | Action | Description | DEC Staff |
|---|---|---|---|
| 5/27/1998 | Site Added to Database | This site was formerly part of Reckey 1992250933501 and has subsequently been separated and decided to be addressed uniquely. Gasoline, diesel and residual range petroleum hydrocarbons. | Eileen Olson |
| 1/25/2000 | Site Ranked Using the AHRM | Initial ranking. | Eileen Olson |
| 6/26/2008 | Update or Other Action | Per the FAA spreadsheet: AST 17-B-001 was a 250-gallon welded steel tank, which stored unleaded gasoline for fueling. Records indicate that the tank was installed in 1988, and in FY95 the AST was emptied and placed on an existing concrete slab southeast of Building 200. In FY95, OHM conducted a site delineation analysis around Building 200. Based on the delineation analysis, excavation was conducted to different depths inside the delineated area to remove soils with petroleum hydrocarbon contamination above ADEC cleanup criteria. Confirmation soil sample results were below ADEC cleanup criteria. Site closure will be considered when backup documentation has been received from FAA. | Kim DeRuyter |
| 6/26/2008 | Update or Other Action | Per the FAA spreadsheet: AST 17-B-002 was a 500-gallon welded-steel tank at Building 200, which stored heating oil for the shop building furnace. The tank was installed in 1966 on a concrete slab southeast of Bldg 200. This AST was cleaned, cut up, and disposed of at the Aniak landfill. Usable fuel was transferred to a new double-walled tank (AST 17-B-102). Decommissioning activities indicate that because AST 17-B-002 was on a concrete slab surrounded by a curb at the time of removal, it is unlikely that releases from the AST affected surrounding soil. In FY95, OHM conducted a site delineation analysis around Building 200, to remove DDT/DRO/GRO/BTEX contaminated soil from the general area, which would likely include releases from 17-B-002 if there were any. Based on the delineation analysis, excavation was conducted to different depths inside the delineated area to remove soils with petroleum hydrocarbon contamination above ADEC cleanup criteria. Confirmation sampling was conducted to serve as a final indicator of successful removal of contaminated material. Confirmation soil sample results were below ADEC cleanup criteria in most of the area, with DRO/GRO/BTEX remaining in a small pocket at 3'-4' BGS near the east corner of Building 200. It is unclear if contamination extends under the building, and a GW monitoring well 20" away had no petroleum contamination above cleanup levels. FAA will assume additional excavation is required to remove all petroelum contaminated soil near the foundation and in FY20 will remove contamination, FY21 prepare site closure documentation. | Kim DeRuyter |
| 6/26/2008 | Exposure Tracking Model Ranking | Initial ranking with ETM completed. Thereis a low potential exposure to subsurface soil and possibly groundwater near the building foundation near former AST 17-B-2. Most of the contaminated soil was removed, but contaminated soil next to the buildings foundation remains. A nearby monitoring well sample did not detect contamination. | Kim DeRuyter |
| 12/7/2009 | Update or Other Action | Changed the site name for FAA - Aniak Maintenance Building 200 to FAA - Aniak Building 200 POL Releases because this site has traditionally only tracked the POL releases at Building 200. Potential and documented pesticide releases at this site and facility wide, are tracked under a seperate site. Updated the problem statement to reflect this change. | Kim DeRuyter |
| 12/17/2009 | Cleanup Complete Determination Issued | The 1996 Final Remedial Action Report describes the removal action at Building 200. A 500 gallon welded steel UST heating oil tank had been removed from the east side of building 200 in 1990. The fuel and water from the tank was placed in 4, 55 gallon drums. One of the drums burst spilling it's contents to the surface soil on the east side of Building 200. No soil samples were collected at the time of the tank removal. In 1996, a 30 x 40 foot area was excavated to remove pesticide, lead and petroleum contaminated soil. Guided by an onsite GC, and offsite analytical results the excavation extended to a depth of 4 to 5 feet below ground surface. Low levels of petroleum were detected on the sidewall of the excavation near the building foundation. Only one analyte diesel range organics (410 mg/kg) slightly exceeded the Method 2 Migration to Groundwater Cleanup level in confirmation samples taken from the sidewalls and bottom of the excavation. Two previous samples had detected lead above the cleanup level in surface soil at this site. This soil was removed during the excavation and subsequent samples detected only low concentrations of lead likely consistent with background concentrations in soil. A monitoring well placed adjacent to the excavation did not detect petroleum contamination. | Kim DeRuyter |
| 5/14/2013 | Update or Other Action | Project Manager changed from Kim DeRuyter to Deb Caillouet | Rebecca Bryan |
Contaminant Information
| Name | Level Description | Media | Comments |
|---|---|---|---|
| DRO | Between Method 2 Migration to Groundwater and Human Health/Ingestion/Inhalation | Soil | DRO to 410 mg/kg remains in soil near the building foundation |
Control Type
| Type | Details |
|---|---|
| No ICs Required |
Requirements
| Description | Details |
|---|---|
| Advance approval required to transport soil or groundwater off-site. |
No associated sites were found.