Site Report: Alyeska PS 03 Gas Condensate Spill
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 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|
|RRO||< Method 2 Most Stringent||Soil|
|No ICs Required|
|Advance approval required to transport soil or groundwater off-site.|