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Site Report: ADOT&PF Unalaska South Channel Bridge Midden Site


Site Name: ADOT&PF Unalaska South Channel Bridge Midden Site
Address: Airport Beach Road & Henry Swanson Drive, SW Corner of Intersection, Unalaska, AK 99685
File Number: 2661.38.009
Hazard ID: 4507
Status: Active
Staff: Linda (Qi) Liu, linda.liu@alaska.gov
Latitude: 53.875278
Longitude: -166.546667
Horizontal Datum:NAD27

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

Petroleum-contaminated soil found during an archeological dig and pre-construction work for realigning the road and constructing a new bridge between Amaknak and Unalaska Islands. The site housed a World War II barracks building or warehouse. While the source of the DRO contaminated soil is unknown, it may be associated with the Formerly Used Defense Site (FUDS). Ounalashka Corporation owned the land; apparently DOT aquired it as a right of way for the road and bridge realignment.

Action Information

Action Date Action Description DEC Staff
11/28/2006 Update or Other Action Field Activities Documentation Report was received for the excavation, sampling, and stockpiling of soil at the south channel bridge midden site. Approximately 18cy of soil was excavated and segregated based on field observations of potential petroeum contamination. Contaminated soil was stored in super sacks, and confirmation samples were taken. DRO was found at a range of 327-4560 mg/kg. 6 confirmation samples were taken in the excavation pit and all found below cleanup levels, ranging from 17.1-32.8 mg/kg DRO. Approximately 10cy of excavated soil was determined unimpacted and taken to the midden storage facility. The super sacks of stockpiled contaminated soil was stored in a DEC approved liner until disposal. The contractor recommended off-site disposal. Meghan Dooley
11/15/2007 Offsite Soil or Groundwater Disposal Approved Offsite disposal of the petroleum contaminated soil approved. Meghan Dooley
11/30/2007 Exposure Tracking Model Ranking Initial ranking completed. Mitzi Read
11/30/2007 Site Added to Database Site added to the database. Mitzi Read

Contaminant Information

Name Level Description Media Comments

Control Type

Type Details

Requirements

Description Details

There are no documents for this site report.

Missing Location Data

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