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 |
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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 Thompson |
| 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 Thompson |
| 4/7/2015 | Institutional Control Update | An IC reminder letter was issued to the responsible party on this date. | Kristin Thompson |
| 10/13/2015 | Institutional Control Periodic Reporting | 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 Thompson |
| 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 |
| 6/19/2018 | Institutional Control Compliance Review | IC compliance review conducted. Closure/IC Details updated. Reminder system already set to follow-up in 2020. | Kristin Thompson |
| 3/11/2020 | Institutional Control Compliance Review | Received a compliance review confirmation letter from the responsible party. All IC conditions are in compliance. Most of the site buildings and structures were removed during a decommissioning effort in 2019. ADEC was notified of this change in an email dated February 5th, 2020. No change in ownership or land use has occurred | Evonne Reese |
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. | Standard condition. |
| When Contaminated Soil is Accessible, Remediation Should Occur | Soil contamination is located in the area of the Turbine Fuel Offload. When the soil in this area becomes accessible, such as during pipeline decommissioning, the soil must be evaluated and contamination addressed in accordance with an ADEC approved work plan. |
| Other | Alyeska Pipeline Service Company shall report to ADEC every five years to document land use, or report as soon as they become aware of any changes in land ownership and/or use. |
| Movement or use of contaminated material (including on site) in a manner that results in a violation of the water quality standards is prohibited (18 AAC 70) | Standard condition. |
No associated sites were found.