Skip to content Skip to content

Site Report: FAA Biorka Island Station LQ LUST

Site Name: FAA Biorka Island Station LQ LUST
Address: Biorka Island, 15 Miles SW of Sitka, Sitka, AK 99835
File Number: 1542.38.001
Hazard ID: 25752
Status: Cleanup Complete
Staff: No Longer Assigned, 9074655229 dec.icunit@alaska.gov
Latitude: 56.853500
Longitude: -135.521333
Horizontal Datum:NAD83

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

Underground Storage Tank (UST) 47-D-01 was a 1,000-gallon regulated diesel UST located at the former VHF site. The tank was closed by removal in 1994. 10 cubic yards of contaminated soil were properly excavated, stockpiled and later treated offsite. Confirmation samples at the limits of excavation detected DRO up to 9,000 mg/kg. The contractor was unaware of remaining contamination and continued excavation of an additional 2800 cubic yards of soil, including an unknown volume and concentration of contaminated soil. The 2800 cys of soil were placed along the cross-island road to improve the road near a hairpin turn. ADEC inspections at the hairpin turn have not indicated any signs of significant contamination. On February 9, 2012, Staff granted a Cleanup Complete determination to this site based on historic data review [Federal Aviation Administration (FAA) Biorka Island Station Living Quarters Summary of Evaluations and Determinations]

Action Information

Action Date Action Description DEC Staff
1/18/2011 Exposure Tracking Model Ranking Initial ranking with ETM completed for source area id: 79023 name: Soil Disposal on Cross Island Road Melanie Forbes
8/2/2011 Leaking Underground Storage Tank Release Confirmed - Petroleum LUST site created in CSP database for source area UST 47-D-1 and Soil Disposal on Cross Island Road, 79023 James Ward
8/2/2011 Leaking Underground Storage Tank Cleanup Initiated - Petroleum Administrative action addition in order to have consistency when reporting LUST grant information. Evonne Reese
10/25/2011 Site Added to Database A new site has been added to the database Mitzi Read
2/9/2012 Cleanup Complete Determination Issued Staff issued a Cleanup Complete determination for this site after a file review. Closure is based on removal of the source area, limited volume of remaining contamination, and low possibility of contaminant exposure or migration. James Ward

Contaminant Information

Name Level Description Media Comments
DRO Between Method 2 Migration to Groundwater and Human Health/Ingestion/Inhalation Soil One sample in 1994 exceeded DRO Table B2 Ingestion cleanup levels, however ADEC has determined that attenuation and dispersal has limited the risk posed by the limited volume and concentration of soil.

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.

Missing Location Data

Because the GIS location data for this site has not been entered, we cannot direct you to its position on the map. Click "Continue" to proceed to the Contaminated Sites Web Map or "Close" to return to the site report.
Continue     Close