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Site Report: Alyeska PS 03 Gas Condensate Spill

Site Name: Alyeska PS 03 Gas Condensate Spill
Address: Mile 311.8 Dalton Highway, Pipeline Mile 104.3, Deadhorse, AK 99734
File Number: 330.38.115
Hazard ID: 4644
Status: Cleanup Complete
Staff: ,
Latitude: 68.842778
Longitude: -148.829722
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.


During the cleanup of a surface spill of oily water and gas condensate on August 27, 2007, Alyeska personnel discovered stained soil with mercaptan odor in the subsurface of the small excavation, which lies west of the Gas Building and south of the Gas Condensate knock out vessel. The release was determined to be historical and the exact cause unknown. Confirmation samples analyzed for GRO, DRO, RRO, PAHs and BTEX contained concentrations below Method One/Method Two cleanup levels with the exception of one sample with a RRO result of 2,820 mg/kg (above the Method One Arctic Zone criteria).

Action Information

Action Date Action Description DEC Staff
6/6/2008 Update or Other Action Received Pump Station 3 Gas Condensate Spill Remediation Work Plan and approved 6/10/08. Keather McLoone
6/12/2008 Site Added to Database Site added to the database. Mitzi Read
6/13/2008 Exposure Tracking Model Ranking Initial ranking with ETM completed. Keather McLoone
2/13/2009 Update or Other Action Receipt of Pump Station 3 Gas Condensate Spill Remediation Report. In 2008, the original excavation was expanded horizontally and vertically. All confirmation samples were below most conservative cleanup levels. Alyeska requests a cleanup complete decision. Keather McLoone
2/27/2009 Exposure Tracking Model Ranking A new updated ranking with ETM has been completed for source area 75711 stained soil area. Keather McLoone
3/9/2009 Cleanup Complete Determination Issued The Alaska Department of Environmental Conservation (ADEC), Contaminated Sites Program, has completed a review of the environmental records associated with Alyeska PS 03 Gas Condensate Spill. 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 this site is closed. This decision is based on the administrative record for Alyeska PS 03 Gas Condensate Spill, which is located in the offices of the Alaska Department of Environmental Conservation (ADEC) in Anchorage, Alaska. Keather McLoone

Contaminant Information

Name Level Description Media Comments
RRO < Method 2 Most Stringent Soil

Control Type

Type Details
No ICs Required


Description Details
Advance approval required to transport soil or groundwater off-site.

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.
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