Skip to content Skip to content

Alaska Department of Environmental Conservation

You are here: DEC / SPAR / CSP / SPAR Online Services / Contaminated Sites Search / Site Report

Site Report: Fort Yukon LRRS -Power Plant (SD03)

Site Name: Fort Yukon LRRS -Power Plant (SD03)
Address: Approx. 1 Mile East of, Fort Yukon Village, Fort Yukon, AK 99740
File Number: 740.38.002
Hazard ID: 741
Status: Cleanup Complete
Staff: No Longer Assigned, 9074655229 dec.icunit@alaska.gov
Latitude: 66.560677
Longitude: -145.210491
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

The power plant was in operation from the 1950s until the early 1980s. Floor drains from the former power plant discharged to the ground. Pipeline and 10,000 gallon tank also suspected as source of extensive POL soil (10,000 - 25,000 mg/Kg) and groundwater contamination (120 mg/L). Soil contamination estimated at 2000 cubic yards. 1994 bioventing pilot study in place. Located in the old composite building. The site is assigned a HIGH overall risk on the Air Force Relative Risk Evaluation Worksheet dated 8/23/95. The worksheet indicates that both the soil and groundwater are contaminated with DRO and BTEX. The town of Fort Yukon is located downgradient from the site. There is a potential for the contaminated groundwater to migrate toward the city water supply.

Action Information

Action Date Action Description DEC Staff
1/5/1995 Site Added to Database Laura Noland
7/18/1995 Site Ranked Using the AHRM Initial ranking. Jeff Peterson
3/14/1996 Update or Other Action (Old R:Base Action Code = CORR - Correspondence (General)). Sent correspondence informing Robert Johnston, engineering manager, that RI cannot be reviewed at this time pending resolution of DSMOA funding for risk assessments. Phone contact also made to inform of letter. Tamar Stephens
3/15/1996 Update or Other Action Received Decision Documents, No Further Response Action Planned (NFRAP).For Landfill #1 (LF02, Road Oiling (SD04) White Alice Site (OT05) Waste Accumulation Area (SS01) UST at Fuel Station (ST06) Kalu Kalu
3/24/1997 Update or Other Action Site updated by Shannon and Wilson, based on the Air Force Relative Risk Evaluation Worksheet dated 8/23/95. S&W
5/28/1997 Proposed Plan Remedial technolgy chosen bioventing with long term monitoring, clean up level of 10,000 ppm DRO in soil. Tamar Stephens
2/23/2000 Update or Other Action Draft Preliminary Assessment, Porcupine River Annex and Christian River Camp, Fort Yukon Long Range Radar Site. No further remedial action. Based on the report it appears this site does not warrant further investigation for soil and groundwater contamination. Action entered by Sarah Riddle Patrice Buck
6/14/2000 Record of Decision Decision Document was signed by ADEC and USAF, Bioventing will be used until a DRO clean up level of 8,333 ppm is achieved Patrice Buck
7/26/2000 Update or Other Action Staff met with 611 observed Bioventing System installation Patrice Buck
8/29/2000 Update or Other Action Long-Term Stockpiling Plan dated August 24, 2000 Fort Yukon Long Range Radar Site. Action entered by Sarah Riddle Patrice Buck
5/2/2001 Update or Other Action Staff reviewed and sent comments on Draft Interim Remedial Action Report Addendum for the 2000 Clean Sweep Activities. The main interest of the report was the installation of the bioventing system, which operated from September to November 2000. A RAB meeting is scheduled for the end of May to discuss the progress of the system. Patrice Buck
1/18/2002 Update or Other Action Received Status Report, IRP Biovent System, Fort Yukon Long Range Radar Site October 22, 2001). ADEC concurs with recommendations of report. Action entered by Sarah Riddle. Patrice Buck
2/14/2005 Update or Other Action Staff reviewed the November 2004 Evaluation of Site SD03 Bioventing and submitted a letter to the Air Force. Debra Caillouet
7/28/2005 Update or Other Action site name changed to SD03 from SS06 to accurately reflect the site name assigned by the Air Force. Debra Caillouet
7/29/2005 Update or Other Action Staff reviewed a biovent evaluation work plan and sent comment letter to supervisor for review Debra Caillouet
8/2/2005 Site Characterization Workplan Approved Staff sent a no comment letter to the Air Force regarding the draft biovent work plan and 5 year review. Debra Caillouet
3/2/2006 Update or Other Action Staff reviewed the report Draft Final, Review of the Bioventing System Effectiveness and Site Closure Request, Site SD03, Ft Yukon Long-Range Radar Site, Alaska, February 2006. Substantial comments were sent in a letter to the Air Force. Debra Caillouet
7/21/2006 Site Characterization Workplan Approved Staff reviewed and approved a sampling and analysis plan to characterize the level of contamination remaining at the Biovent site to determine if it meets the cleanup level in the decision document. Debra Caillouet
10/24/2006 Institutional Control Record Established DEC is issuing a Closure decision for SD03 with the following conditions: 1. The Air Force will maintain the restriction on excavation of soil containing diesel range organics above 250 mg/Kg in the Base Master Plan. Approval for transport or disposal of the subject soil is required under 18 AAC 75.325(i). The placement of any contaminated soil into surface water or at a location where any runoff or leachate could cause a violation of water quality standards is prohibited. 2. The Air Force will perform Five Year Reviews to verify the effectiveness of the restriction on the excavation of the impacted soils until it is demonstrated that all soil is below the 250 mg/Kg level. 3. DEC will maintain a listing of these restrictions in our Contaminated Sites database for the Fort Yukon LRRS, Site SD03, RecKey: 198931X102527. Debra Caillouet
10/24/2006 Conditional Closure Approved Sampling and analysis of the soil in the impacted area was performed in 2005 and indicated that the site was close to the 8,333 mg/Kg DRO level that the Decision Document signed in 2000 stated would be the goal for the bioventing system. Additional samples were collected and analyzed in 2006 based on sampling design developed using Visual Sample Plan with an á error of 5% and a â error of 15% that consisted of 18 sampling locations. Six of these locations were very close to the locations of samples obtained in 2005 and the 2005 data was used along with 12 additional samples obtained in 2006. Utilizing EPA's ProUCL software, the DRO remaining at the site was calculated to be 6733 mg/Kg at the 95% Upper Confidence Level. A cleanup level of 5 ìg/L for benzene in groundwater was also agreed upon in the Decision Document. Groundwater has not been detected at the site since 2000 and when sampled in 2000 benzene was not detected. Debra Caillouet
10/12/2007 Exposure Tracking Model Ranking Debra Caillouet
4/12/2010 Institutional Control Record Removed Debra Caillouet
4/12/2010 Cleanup Complete Determination Issued Debra Caillouet
4/12/2010 Institutional Control Record Removed Institutional Controls have been removed. Debra Caillouet

Contaminant Information

Name Level Description Media Comments
DRO Between Method 2 Migration to Groundwater and Human Health/Ingestion/Inhalation Soil

Control Type

Type Details
No ICs Required

Requirements

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

No associated sites were found.

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.
Continue     Close

Public Notices  •  Regulations  •  Statutes
Press Releases  •  Contact

 

State of Alaska Department of Environmental Conservation

P.O. Box 111800
Juneau, AK 99811-1800
Phone: 907-465-5066
Fax: 907-465-5245
TDD: 800-770-8973
Physical Location: 410 Willoughby