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Site Report: Alyeska PS 10 Turbine Fuel Offload


Site Name: Alyeska PS 10 Turbine Fuel Offload
Address: Mile 218 Richardson Hwy., 50 Miles S. of Delta Jct., Paxson, AK 99737
File Number: 330.38.011
Hazard ID: 1737
Status: Cleanup Complete - Institutional Controls
Staff: IC Unit, 9074655229 dec.icunit@alaska.gov
Latitude: 63.424440
Longitude: -145.769000
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

Alyeska Pipeline Service Co. performed a SA of the turbine fuel offloading area at PS10. 185 cubic yards of soils contaminated with petroleum hydrocarbons were excavated and were thermally remediated. Extent of contamination not delineated horizontally or vertically. Samples up to 23,000 mg/kg DRO in the subsuface and 15,000 mg/kg DRO in the surface soil. Alyeska placed an impermeable liner underneath the turbine handling area to limit migration from any possible future releases. This appears to cover part of the excavated area.

Action Information

Action Date Action Description DEC Staff
5/22/1992 Update or Other Action (Old R:Base Action Code = SA2R - Phase II SA Review (CS)). Site assessment performed on May 22, 1992. Data not reported to department until submittal of corrective action report. Soil borings indicate DRO contamination to a depth of approximately 10'. Groundwater contamiantion 0.01mg/l ethylbenzene and 0.02 mg/l total xylenes. Mehrdad Nadem
9/1/1992 Update or Other Action (Old R:Base Action Code = RARR - Remedial Action Report Review (CS)). EMCON submitted a corrective action report which identified 185 cubic yards of contamination excavated at the Turbine fuel loading/offloading area. Contaminated soils were only excavated to a depth of 3.8' below grade. Sample data indicate that contamination extents to at least 10' below grade. All contamination below 3.8' depth was left in place. Alyeska agreed to address the additional contamination upon facility shutdown. Groundwater samples indicate BTEX contamination below any action levels. Mehrdad Nadem
10/28/1992 Site Added to Database Petroleum hydrocarbons. Mehrdad Nadem
1/6/1995 Site Number Identifier Changed Old region = 40. Scott Rose
4/21/1998 Site Ranked Using the AHRM Ranking action added now because it was not added when the site was originally ranked. Bill Petrik
1/9/2004 Update or Other Action No documentation of disposal received by ADEC. Deborah Williams
12/27/2007 Exposure Tracking Model Ranking Initial ranking with ETM completed. Keather McLoone
4/10/2008 Update or Other Action Description/Comment edited. Formerly stated that this was a potential IC site due to contamination under buidling foundation which appears to be incorrect based on the single report in the file. High levels of DRO in soil samples - 15,000 mg/kg at 1.5 feet and 23,000 mg.kg at 3.8 feet. 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 Turbine Fuel Offload 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 Turbine Fuel Offload, 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 Turbine Fuel Offload 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
DRO Between Method 2 Migration to Groundwater and Human Health/Ingestion/Inhalation Soil decision letter stated "may be above ingestion, direct contact, inhalation pathways, and migration to groundwater" but probably didn't need to say that except for migration to groundwater

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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