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Site Report: Alyeska PS 10 Booster Pump Building


Site Name: Alyeska PS 10 Booster Pump Building
Address: Mile 218 Richardson Hwy., Pump Station 10, Paxson, AK 99737
File Number: 330.38.057
Hazard ID: 1727
Status: Cleanup Complete - Institutional Controls
Staff: IC Unit, 9074655229 dec.icunit@alaska.gov
Latitude: 63.424170
Longitude: -145.766490
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

A spill of residual oil occurred in the booster pump enclosure of PS#10 due to a broken seal in a return line originating at the Topping Unit. 15 yards of contaminated gravel was removed with a super sucker from the south wall of the booster pump enclosure. Additional contamination was left in place due to concerns of building integrity. Additional remediation will be required upon facility shutdown or reconfiguration. A potential IC site due to contamination under building foundation. Another later cleanup was performed at this location - see file 330.38.090

Action Information

Action Date Action Description DEC Staff
12/14/1992 Update or Other Action (Old R:Base Action Code = RARR - Remedial Action Report Review (CS)). Alyeska used a supersucker to remove 15 cubic yards of residual oil contamination from the south side of the Booster Pump building. Excavation floor sampling indicates contamination occurrs at depth. TPH concentrations ranged from 50 mg/kg to 16,000 mg/kg. Mehrdad Nadem
2/15/1996 Site Added to Database Site added during records search. Scott Rose
2/15/1996 Site Ranked Using the AHRM Initial ranking. Scott Rose
1/11/2008 Exposure Tracking Model Ranking Initial ranking with ETM completed. Keather McLoone
3/26/2010 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 10 Booster Pump Building site. 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 PS 10 Booster Pump Building, which is located in the offices of the ADEC in Anchorage, Alaska. Keather McLoone
4/6/2010 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
4/7/2015 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
11/20/2017 Meeting or Teleconference Held Attended a meeting regarding the elimination of non-essential infrastructure at Pump Station 10. There are five Alyeska sites located at this pump station that have institutional controls and this site is one of them. Construction is in the planning stages and will not begin until 2019. The foundations for the buildings on the pad will remain in place so the residual contamination that may remain underneath the foundations will remain in place. Because of this, the project is not planning on addressing the known contaminated site issues. Verifying this detail should be included in the next IC compliance review. Evonne Reese
11/20/2017 Meeting or Teleconference Held Meeting with Alyeska on this date. the Booster Pump Building will be removed in 2019 as part of the PS 10 Elimination of non-essential infrastructure. Grant Lidren

Contaminant Information

Name Level Description Media Comments
TPH > Human Health/Ingestion/Inhalation Soil estimated RRO concentration is what exceeds at ~ 14,000 mg/kg

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
Periodic Review

Missing Location Data

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