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Site Report: Adak Yakutat Hangar USTs T2039B & C

Site Name: Adak Yakutat Hangar USTs T2039B & C
Address: OU A, Adak Naval Air Facility, Adak, AK 99546
File Number: 2501.38.003.08
Hazard ID: 3463
Status: Cleanup Complete - Institutional Controls
Staff: Jamie McKellar, 9074515175 jamie.mckellar@alaska.gov
Latitude: 51.873997
Longitude: -176.656911
Horizontal Datum:NAD83

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

Building T-2039 was built during the 1940s as an airplane hangar. It is unknown when the automotive repair garage was constructed. Sometime in the late 1970s, the hangar was converted from its original use to house additional automobile repair and automotive hobby shop facilities. Together, the hangar and garage formed the auto hobby shop facilities and were operated and maintained by the Morale, Welfare, and Recreation Department of the NAF Adak. USTs T-2039-B and C were located at the southern end of the automotive hobby garage neat the northeast corner of the Yakutat Hangar Building. UST T-2039-B contained JP-5 used to fuel a heating boiler inside the hobby garage. UST T-2039-C contained waste oil and fuel collected by the floor drains within the garage building. Both USTs removed in 1995. Limited soil removal selected under SAERA in OU A ROD. Aesthetic remedy completed in 1999. Site was removed from the OU A ROD the OU A ROD amendment for regulation under 18 AAC 75. Site is currently in the proposed plan stage.

Action Information

Action Date Action Description DEC Staff
4/15/2000 Site Added to Database Petroleum. Elim Yoon
4/15/2000 Record of Decision The Record of Decision for this site was signed this date. Elim Yoon
10/10/2003 Record of Decision Site removed from OU A ROD by OU A ROD Amendment for regulation under 18 AAC 75. Sami Goldman
3/17/2004 Institutional Control Record Established Interim conveyance document contains an equitable servitude that restricts residential land use as well as the domestic use of groundwater. Site is also located in the downtown excavation notification zone. Jason Weigle
9/1/2004 Update or Other Action Tanks are part of spill located around Yakutat Hanger; RAC is in progress around site, including free product recovery Jason Weigle
9/1/2004 Update or Other Action Site is in the draft proposed plan stage Jason Weigle
9/15/2004 Risk Assessment Report Approved Risk Assessment approved as part of Focused Feasibility Study for Free-Product Sites Below Health Goals Jason Weigle
9/15/2004 Site Characterization Report Approved Site characterization report approved as part of Focused Feasibility Study for Free-Product Sites Below Health Goals Jason Weigle
10/19/2004 GIS Position Updated Latitude and Longitude was derived using ArcGIS with either High Resolution Aerial Photography from the Navy with an up to 3 meters error, or line maps used in investigations combined with road layers, +/-25 feet accuracy.  Metadata is as follows: Updated NAD 1983 State Plane Alaska 10 FIPS 5010 Feet; Projection: Lambert Conformal Conic; False Easting: 3280833.333333; False Northing: 0.000000; Central Meridian: -176.000000; Standard Parallel 1: 51.833333; Standard Parallel 2: 53.833333; Latitude of Origin: 51.000000; GCS North American 1983. Jason Weigle
10/26/2004 Conditional Closure Approved Changed status to NFRAP; not expecting any additional work to take place at this site. Jason Weigle
11/19/2004 Update or Other Action Draft Final Cleanup Report, 19 Sites submitted to Department for Review. Jason Weigle
12/10/2004 Cleanup Level(s) Approved 10X Table C levels selected in Proposed Plan. Jason Weigle
12/10/2004 Proposed Plan Proposed plan approved on this date Jason Weigle
12/10/2004 Update or Other Action Review of Draft Final Cleanup Report, 19 sites completed; comments were submitted to the Navy. The document was incomplete as submitted; Navy will revise and resubmit. Jason Weigle
1/24/2005 Update or Other Action Received copy of the Draft Decision Document for Petroleum Sites with No Unacceptable Risk for review. Jason Weigle
2/8/2005 Update or Other Action Risk assessments were used to justify remedial endpoints for active remediation, not final clean-up endpoints. Jason Weigle
2/8/2005 Update or Other Action Limited groundwater monitoring selected for the Yakutat Hangar site in Proposed Plan. Wells will monitor any residual affect from this site. Jason Weigle
2/17/2005 Update or Other Action Completed review of the Draft Decision Document for Petroleum Sites with No Unacceptable Risk. Sent comments to the Navy for incorporation into the Decision Document. Jason Weigle
2/17/2005 Update or Other Action Received copy of the 2004 Annual Groundwater Monitoring Report for review. Jason Weigle
3/4/2005 Update or Other Action Completed review of the 2004 Annual Groundwater Monitoring Report; sent comments to Navy. Jason Weigle
3/7/2005 Update or Other Action Added MRTS data, derived from ADNR and USGS range, township, and section data overlaid on lat/lon coordinates derived previously. Accuracy is equivalent to the lat/lon coordinates. MRTS information depicts the center point of range fans and target areas; actual target areas or fans may overlap several sections. Jason Weigle
3/8/2005 Update or Other Action Added legal description for site. Jason Weigle
5/20/2005 Record of Decision The Decision Document for Petroleum Sites with No Unacceptable Risks was signed on this date. Jason Weigle
1/11/2006 Update or Other Action Interim removal action completed at this site. The OU A ROD selected free product recovery as an interim measure at this site. A report, the Closure Report, Interim Action Free Product Recovery, was submitted on November 18, 2005 for review. The Department completed review and submitted a closure letter on January 11, 2006, closing the interim remedy in favor of the currently selected remedy in the Decision Document for this site. Jason Weigle
1/19/2006 Update or Other Action File number issued 2501.38.003.08. Aggie Blandford
3/20/2006 Update or Other Action Final 2005 Institutional Control Primary Site Inspection Report received on this date. No IC problems noted at this site. Jason Weigle
3/20/2006 Update or Other Action The draft annual groundwater monitoring report for 2005 was received on this date. Jason Weigle
2/16/2011 Document, Report, or Work plan Review - other The draft 2010 IC Site Inspection Report was received on January 11, 2011 and DEC sent comments on February 16, 2011. There were no observed problems with ICs at this site. Meghan Dooley
3/11/2024 ANCSA Program Eligible This site meets the criteria for the EPA Contaminated ANCSA Lands program: the site is on ANCSA conveyed land, the contamination occurred pre-ANCSA conveyance, and there is documented proof of contamination that exceeds DEC’s cleanup values in 18 AAC 75. This site will be listed as “verified” on EPA’s contaminated lands inventory. Brittani Mack
9/18/2025 Site Visit CSP staff conducted a site visit to Adak Island September 17-20, 2025. Along with EPA and the Navy, CSP staff attended a Regional Advisory Board (RAB) meeting in Adak to engage with the community and discuss ongoing environmental cleanup efforts at the former Adak Naval Air Station. While on island, CSP joined EPA and the Navy to visit multiple contaminated sites and met with a community member to observe the waterline supplying drinking water from Lake Bonnie Rose. Jamie McKellar
9/29/2025 Document, Report, or Work plan Review - other COMPREHENSIVE MONITORING PLAN, Revision 9, Institutional Control Management Plan. DEC provided comments on CMP Revision 9 which describes the mechanisms that have been implemented to ensure compliance with institutional controls (ICs) for sites at the former Adak NAS (includes active sites and sites closed with ICs). The CMP also includes the details for Munitions Educational Awareness Program, which is required by the OU B-1 ROD and will address sites in the in-draft OU B-2 ROD. Note that munitions sites addressed in the OU B-1 ROD with slopes exceeding 30 degrees were issued No Further Action determinations as part of that ROD. This includes C3-01A through C3-01F, FB-01, FB-03, 260 HH-01, ML-01A, ML-01B, and ML-01C. Jamie McKellar
10/21/2025 Institutional Control Periodic Reporting REPORT APPROVAL: DEC approved the 2024 Institutional Controls Inspection Report, which documents site inspections conducted between August 15–30, 2024. While the report is approved, DEC has noted several observations for documentation, including references to RCRA status, environmental release reporting, SWMU 1 and SWMU 20. These observations do not affect the approval of the ICIR but may warrant further evaluation during the upcoming Five-Year Review. DEC continues to coordinate with the Navy to ensure long-term protectiveness of institutional controls at the Adak site. Jamie McKellar

Contaminant Information

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

Control Type

Type Details
Equitable Servitude The Equitable Servitude to the Interim Conveyance Document restricts groundwater use and residential land use.
Institutional Control Management Plan The Institutional Control Management Plan, a supbart of the base-wide Comprehensive Monitoring Plan, requires the completion of a dig notification in the Downtown Area and at several outback locations.

Requirements

Description Details
Excavation / Soil Movement Restrictions All excavation within the 'downtown area' of Adak, as defined in the Equitable Servitude to the Interim Conveyance Document, must be submitted to the City of Adak and the Navy for review three days prior to excavation. Annual report of excavation notifications included in the IC Inspection Report.
Restricted to Industrial / Commercial Land Use Equitable servitude restricts land uses to non-residential uses. Site is inspected and reported yearly to ensure there are no residential land uses taking place.
Groundwater Use Restrictions The Equitable Servitude restricts groundwater use in the Downtown Area. Site is inspected and reported yearly to ensure groundwater is not being used in the Downtown Area.

There are no documents for this site report.

No associated sites were found.

Missing Location Data

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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