Site Report: FAA Biorka Island Station VORTAC Unpermitted Landfill
| Site Name: | FAA Biorka Island Station VORTAC Unpermitted Landfill |
|---|---|
| Address: | Biorka Island, 15 Miles SW of Sitka, Sitka, AK 99835 |
| File Number: | 1542.38.001 |
| Hazard ID: | 25751 |
| Status: | Cleanup Complete |
| Staff: | No Longer Assigned, 9074655229 dec.icunit@alaska.gov |
| Latitude: | 56.853520 |
| Longitude: | -135.534744 |
| 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
Landfill was used by FAA and USCG after 1964 for disposal of general debris, particularly scrap metal. Surveying, cover inspection, and evaluation were conducted in 1997 to support a landfill closure. The site has been used as a helicopter landing pad since 1979. On February 9, 2012, Staff issued a letter determining that Further Action is Required at this site [Federal Aviation Administration (FAA) Biorka Island Station VORTAC Summary of Evaluations and Determinations]. To reach a Cleanup Complete with ICs determination, FAA must complete a survey and install monuments to relate GPS coordinates from the 1998 report, and must produce a deed notice to inform future users of the landfilll and prohibit digging or developing over the site. A land survey was completed at the former landfill site on July 25, 2013. Two monuments were installed to relate GPS coordinates from the 1998 CH2-OH Landfill Closure report. Two survey points provided from the 1998 report were used to locate the extents of the landfill. The monuments were installed at ground level with a 2-foot piece of rebar steel anchor driven into the ground with a 2-inch polyethylene cap set in cement measuring 1-foot deep by 1-foot in diameter. The monuments installed are permanent in nature, and will not interfere with the FAA's current use of the area. It was recommended that a deed notice be filed to complete the 'Cleanup Complete' determination requirements. In an ADEC Decision Document dated January 4, 2017, this site was granted a 'Cleanup Complete' determination. Sampling at this site indicated that contamination has been removed from the landfill surface and leaching is not occurring. A permanent marker at the site (monument) has been installed, the cap is in place, and the landfill has been surveyed.
Action Information
| Action Date | Action | Description | DEC Staff |
|---|---|---|---|
| 1/5/2011 | Exposure Tracking Model Ranking | Initial ranking with ETM completed for source area id: 79009 name: Unpermitted Landfill under Helipad (VORTAC) | Melanie Forbes |
| 10/25/2011 | Site Added to Database | A new site has been added to the database | Mitzi Read |
| 2/9/2012 | Update or Other Action | On this date, Staff issued a letter [Federal Aviation Administration (FAA) Biorka Island Station VORTAC Summary of Evaluations and Determinations]. Staff reviewed site history and avaliable data to determine the site status for this site. To reach a Cleanup Complete with ICs designation, FAA must complete a survey and install monuments to relate GPS coordinates from the 1998 landfill closure report, and must produce a deed notice to inform future users of the landfill under the helipad and prohibit digging or developing this location. | James Ward |
| 2/27/2015 | Site Characterization Report Approved | ADEC Approval of the Remedial Action and Investigation Report, Federal Aviation Administration (FAA), FAA Station Biorka Island, Alaska. This report describes the results of the 2013 investigation and remediation activities at the FAA Station at Biorka Island. Seven Areas of Concern (AOCs) were addressed in this report, from the FAA Biorka Island Station LQ (Hazard ID: 901); FAA Biorka Island Station VORTAC (Hazard ID: 1761); and FAA Biorka Island Station VORTAC Unpermitted Landfill (Hazard ID: 25751) sites. Recommendations for the seven AOCs included in this report will be addressed in the Biorka Island Record of Decision (2015). | Monte Garroutte |
| 4/26/2016 | Update or Other Action | Site reassigned for follow up by project manager | Fred Vreeman |
| 11/18/2016 | Site Characterization Report Approved | DEC Approved the Final Report, 2015 Site Investigation. This Report details the 2015 Site Investigation (SI) activities performed at the Federal Aviation Administration (FAA) Station Biorka Island, Alaska. The SI objective was the collection of site information to fill data gaps at multiple areas of concern (AOCs) to determine if additional remedial actions are necessary or to support site closure. This included delineating the remaining petroleum contamination at four areas of concern (AOCs) using UVOST, sampling and delineating two suspected areas of PAH contamination, installing one groundwater monitoring well at the Tank Farm Fill Valve AOC, sampling two existing monitoring wells at the Building 201 AOC, sampling potential leachate from a demolition debris monofill, and sampling porewater/surface water near three AOCs. | Monte Garroutte |
| 1/4/2017 | Update or Other Action | On this date, ADEC issued a Decision Document for the FAA Biorka Island Station sites. The Unpermitted Landfill Under Helipad received a Cleanup Complete determination. Sampling has indicated that contamination has been removed from the landfill surface and leaching is not occurring. A permanent marker at the site (monument) has been installed, the cap is in place, and the landfill has been surveyed. | Monte Garroutte |
| 1/4/2017 | Cleanup Complete Determination Issued | Based on the review of the environmental record, DEC has determined that residual contaminant concentrations meet the human health cumulative risk criteria for residential land use. This site does not pose an unacceptable risk to human health or the environment, and will receive a 'Cleanup Complete' determination. | Monte Garroutte |
Contaminant Information
| Name | Level Description | Media | Comments |
|---|---|---|---|
| DRO | < Method 2 Most Stringent | Soil | Sampling has indicated that petroleum contamination has been removed from the landfill surface. |
Control Type
| Type | Details |
|---|---|
| No ICs Required |
Requirements
| Description | Details |
|---|---|
| Advance approval required to transport soil or groundwater off-site. | |
| Movement or use of contaminated material (including on site) in a manner that results in a violation of the water quality standards is prohibited (18 AAC 70) |
No associated sites were found.