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Site Report: FAA Cape Yakataga Station Former Quarters Area

Site Name: FAA Cape Yakataga Station Former Quarters Area
Address: Includes Former School Building 303 and plume, extending to the southwest, Cape Yakataga, AK 99574
File Number: 2208.38.001
Hazard ID: 25324
Status: Cleanup Complete
Staff: No Longer Assigned, 9074655229 dec.icunit@alaska.gov
Latitude: 60.081944
Longitude: -142.486389
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 Quarters is a non-active FAA owned facility with a 600-foot fuel pipeline system that was decommissioned in the early 1970s. In FY99, the fuel line was removed and screening samples were taken from the bottom of the trench excavations to identify residual areas of contaminated soil. Approximately 30 cu. yds of contaminated soil were excavated and put into a long-term stockpile on site. Confirmatory samples taken from the bottom of the excavations determined that DRO contamination remained above ADEC cleanup criteria. Confirmation samples revealed residual DRO and GRO contamination remained above ADEC cleanup criteria at several areas along the pipeline. Further investigation conducted during the FY00 RI revealed that extensive soil contamination remained in the former Quarters area, with soil contamination likely extending from the ground surface to the water table. While the groundwater has not been affected, an estimated 2,700 to 6,200 cubic yards of soil require remediation. The reports do not identify a source for the DRO that would account for the DRO away from the pipeline. From the 2000 RI it appears to have orginated near the former school. The Stockpile behind storage sheds was relocated to a passive biocell and the soils were shipped off-site in 2008. The 2012 Release Investigation defined the extent of the plume. DRO was found at a max of 1.4 mg/l in the groundwater. DRO contamination in soil is in the smear zone, 18-22 feet bgs with a max found of 7600 mg/kg.

Action Information

Action Date Action Description DEC Staff
12/13/1993 Site Added to Database Chlorinated solvents, metals, diesel, gasoline and waste oil. Former Staff
12/21/1994 Update or Other Action (Old R:Base Action Code = RPL2 - Site Information Request Letter). Former Staff
2/7/1995 Update or Other Action (Old R:Base Action Code = SA2 - Phase II Site Assessment (General)). Review of "Compliance Investigation Report" --ADEC had no comment except that it was looking forward to work plan submittal. Randy Rice
11/28/1997 Site Ranked Using the AHRM Initial ranking. Sally Schlichting
2/18/2000 Meeting or Teleconference Held Met with FAA and contractor to discuss file, ADEC requirements for additional characterization, and target cleanup levels. Eileen Olson
2/28/2000 Update or Other Action Issued file review letter outlining alternatives for developing cleanup levels and requesting additional investigation and monitoring. Eileen Olson
3/23/2000 Site Ranked Using the AHRM Reranked site to reflect the presence of contamination in groundwater monitoring wells (Groundwater Exposure Index Value went from 0 to 1) and existence of on-site water well (groundwater Exposure went from 0.1 to 0.8)--the well is used for bathing and other purposes, but drinking water is brought in. Site was a high priority before changes were made and still is. Eileen Olson
6/29/2000 Site Characterization Workplan Approved Letter sent: Staff conditionally approved a release investigation work plan for additional characterization of soil and groundwater contamination at this remote facility, to begin by mid-July. FAA plans to construct several monitoring wells in highly contaminated areas, and several sentinel wells to determine whether groundwater contaminants are migrating off-site into the adjacent marine environment or other surface waters. FAA also plans to construct a lined and covered passive biocell to contain about 60 cubic yards of diesel contaminated soil. The soil will be placed in the cell in an 18-inch-thick lift. Soil type is primarily sandy gravel. Eileen Olson
11/16/2000 Meeting or Teleconference Held Meeting at FAA to discuss the findings of the Cape Yakataga investigation. Free product present. Requested table showing screened intervals correlated with water depths in monitoring wells. Eileen Olson
9/18/2002 Update or Other Action Sent letter requesting groundwater monitoring for all existing wells on site, with a schedule of monitoring to be submitted by March 31, 2003 and the monitoring to be complete by June 30, 2003. Elizabeth Stergiou
9/19/2002 Update or Other Action Sent letter requesting FAA submit the following documents by October 1, 2002: Environmental Compliance Investigation Report, the final release investigation report from 2000, status of free product and status of the all contaminated sites at the station. Elizabeth Stergiou
9/4/2003 Update or Other Action ADEC approved the workplan for the Fall 2003 Sampling and Analysis Plan for various sites. Deborah Williams
5/7/2004 Site Number Identifier Changed Region changed from 11 to 24. Former Staff
2/23/2007 Update or Other Action comment letter sent on the scope of work for landfill removal Debra Caillouet
4/10/2007 Update or Other Action Staff provided expedited comment on the draft landfill removal work plan Debra Caillouet
4/30/2007 Cleanup Plan Approved Plan to remove contents of landfill eroding into the Duktoth and charcterize and dispose was approved Debra Caillouet
8/20/2007 Cleanup Plan Approved The Phase II removal action work plan addendum was approved. The FAA will remove the top half of the landfill during August-September 2007 and store equipment at the site over winter. Another work plan will be provided for Phase III which will occur next spring to complete the removal of the contaminated soil. Debra Caillouet
10/12/2007 Exposure Tracking Model Ranking Debra Caillouet
3/7/2008 Update or Other Action Comments on the draft Phase I/II removal report were sent to the FAA. Debra Caillouet
3/24/2008 Update or Other Action Comments were sent on the Phase III landfill removal work plan. Debra Caillouet
11/20/2008 Document, Report, or Work plan Review - other Staff reviewed and prepared comment on the Cape Yakataga Debris Removal, Phase III Report, Revision 0, October 2008 Debra Caillouet
11/20/2008 Exposure Tracking Model Ranking A new updated ranking with ETM has been completed for source area 78271 landfill. Debra Caillouet
1/9/2009 Interim Removal Action Approved Staff approved the PhaseI/II landfill removal report Debra Caillouet
1/12/2009 Site Added to Database A new site has been added to the database Mitzi Read
1/12/2009 Exposure Tracking Model Ranking Initial ranking with ETM completed for source area id: 78680 name: Former Quarters Area Debra Caillouet
3/28/2012 Document, Report, or Work plan Review - other Draft Work Plan, Federal Aviation Administration Release Investigation, FAA Station Cape Yakataga, March 9, 2012 Debra Caillouet
10/29/2013 Site Characterization Report Approved The 2012 Release Investigation defined the extent of the plume. DRO was found at a max of 1.4 mg/l in the groundwater. DRO contamination in soil is in the smear zone, 18-22 feet bgs with a max found of 7600 mg/kg. Debra Caillouet
11/20/2013 Cleanup Complete Determination Issued Final Release Investigation and Hydrocarbon Risk Calculator Report, FAA Station Cape Yakataga, September 2013 Former Quarters Area/Station Yard (Hazard ID 25324) This AOC includes the former School Building 303. During the 2012 RI, 129 UVOST probes were advanced to investigate the extent of contamination at the Station Yard AOC, extending from the roadway north of the Station Yard to the vegetated section between the Station Yard and the airstrip. A total of 21 soil borings were advanced and 26 soil samples were collected for laboratory analysis. DRO concentrations in soil were greater than ADEC Method Two, Over 40-Inch Zone, Migration to Groundwater cleanup levels in 19 of the 26 soil samples analyzed for DRO. DRO concentrations in these samples ranged from 350 to 7,600 mg/kg. All BTEX, GRO, and RRO concentrations were less than the applicable ADEC Method Two cleanup levels. Ten wells were sampled and the groundwater analyzed for DRO, GRO, RRO and BTEX. No contaminants were detected at concentrations greater than ADEC Table C Groundwater cleanup levels. Based on the HRC calculations, the Station Yard AOC at the FAA Station Cape Yakataga is eligible for a Cleanup Complete determination. It is recommended that ADEC grant the Station Yard AOC a Cleanup Complete determination with no ICs. ADEC concurs and is listing this site as Cleanup Complete in the Contaminated Sites Database. 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.

There are no documents for this site report.

No associated sites were found.

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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