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Site Report: Alyeska PS 06 Jet Shed


Site Name: Alyeska PS 06 Jet Shed
Address: Mile 55 Dalton Highway, Pump Station 6, Minto, AK 99758
File Number: 330.38.070
Hazard ID: 3115
Status: Cleanup Complete - Institutional Controls
Staff: IC Unit, 9074655229 dec.icunit@alaska.gov
Latitude: 65.854821
Longitude: -149.731280
Horizontal Datum:WGS84

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

On December 10, 1998, a release of JP-4 fuel occurred south of the JP-4 dispensing building near the eastern edge of PS6. Contaminated soil was excavated except under the fuel dispensing building foundation. Sampling revealed benzene impacted soil above the ADEC Method 2 cleanup level on the excavation floor and benzene and DRO impacted soil above the Method 2 cleanup levels immediately adjacent to the fuel dispenser building. Release estimated to be 20 gallons in volume. Note: this site is co-located with: Alyeska PS 06 JP4 Fueling Facility; Hazard ID: 1437; File Number:330.38.075. Groundwater monitoring in the area being conducted and reported under 330.38.007 PS 06 Leach Field/Fuel Island site. PS 06 hauls its water from a source 5 miles away. Previously there was a drinking water well at PS 06 that was reported to have a depth to static groundwater level of more than 600 feet bgs.

Action Information

Action Date Action Description DEC Staff
4/10/2000 Update or Other Action Received Pump Station 6 Jet Shed Interim Removal Action and Assessment Report. 20-25 cubic yards removed (July 30-31 1999) using hand tools and confirmation samples collected (August 5 1999). These 4 samples (1 from along the excavation wall under the shed and 3 excavation floor samples) and a duplicate were analyzed for DRO and BTEX. The excavation wall sample (and its duplicate) had benzene (0.15 and 0.05 mg/kg) and DRO (950 and 660 mg/kg) concentrations above cleanup levels. One floor sample (under piping elbow) had a benzene concentration of 0.05 mg/kg (above migration to groundwater cleanup in under 40-inch zone) - all other results below cleanup levels. Keather McLoone
6/15/2000 Site Added to Database JP-4 fuel source - benzene and DRO impacted soil. Bruce Wanstall
6/15/2000 Site Ranked Using the AHRM Initial ranking. Deborah Williams
4/27/2001 Update or Other Action Date NFRAP (with arctic zone levels based on presence of continuous permafrost) initially drafted to await disposal documentation. Keather McLoone
1/15/2008 Exposure Tracking Model Ranking Initial ranking with ETM completed. Keather McLoone
11/6/2008 Update or Other Action Requested information regarding soil disposition for Alyeska Spill number 1998114. Keather McLoone
2/24/2010 Cleanup Complete Determination Issued The Alaska Department of Environmental Conservation (ADEC), Contaminated Sites Program, has completed a review of the environmental records associated with the Alyeska PS 06 Jet Shed. Based on the information provided to date, the ADEC has determined that the contaminant concentrations remaining on site do not pose an unacceptable risk to human health or the environment, and no further remedial action will be required as long as the site is in compliance with established institutional controls. This decision is based on the administrative record for Alyeska PS 06 Jet Shed, which is located in the offices of the ADEC in Anchorage, Alaska. Keather McLoone
2/24/2010 Institutional Control Record Established Institutional Controls established and entered into the database. Keather McLoone
12/1/2011 Update or Other Action The current project manager chose to retain management of this site with the Cleanup Complete Determination that has Institutional Controls. Kristin Brown
11/12/2013 Institutional Control Compliance Review IC compliance review conducted and staff changed from Linda Nuechterlein to IC Unit. Reminder system set-up to follow-up with the responsible party in 2015. Kristin Brown
3/9/2015 Institutional Control Update An IC reminder letter was issued to the responsible party on this date. Kristin Brown
10/13/2015 Institutional Control Update The responsible party informed ADEC that there have been no changes in land use or ownership at this site since the 2010 Record of Decision. Reminder system re-set to follow up in another five years. Kristin Brown

Contaminant Information

Name Level Description Media Comments
DRO Between Method 2 Migration to Groundwater and Human Health/Ingestion/Inhalation Soil
Benzene Between Method 2 Migration to Groundwater and Human Health/Ingestion/Inhalation Soil

Control Type

Type Details
Signed CS Determination

Requirements

Description Details
Advance approval required to transport soil or groundwater off-site.
When Contaminated Soil is Accessible, Remediation Should Occur

Missing Location Data

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