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Site Report: Collinson Point DEW Line Quonset Hut #3

Site Name: Collinson Point DEW Line Quonset Hut #3
Address: Simpson Cove; Camden Bay, ~30 Miles SW of Kaktovik, Kaktovik, AK 99747
File Number: 380.38.002
Hazard ID: 25330
Status: Cleanup Complete
Staff: No Longer Assigned, 9074655229 dec.icunit@alaska.gov
Latitude: 69.974722
Longitude: -144.833333
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

Quonset Hut #3 is recommended for cleanup because of the presence of PCBs in soil at concentrations exceeding the ADEC cleanup level. Quonset Hut #3 was on a small gravel pad about 100 yards east of the main station pad, connected to the main pad by a gravel road. A tundra pond is south of this smaller gravel pad. The Quonset hut was likely used for housing DEW Line station personnel. PCBs are present in concentrations exceeding the ADEC Table B soil cleanup level, so further remedial action is necessary. An estimated area approximately 40 feet by 20 feet, with an assumed depth of 3 feet bgs, will require remedial action to mitigate risks due to PCBs. This equates to an estimated 88 cy of in-place PCB-contaminated soil. The data set suggests a moderate level of uncertainty regarding the extent and volume of PCB-contaminated media.

Action Information

Action Date Action Description DEC Staff
7/1/1985 Site Added to Database A new site has been added to the database (Date adjusted from 1/12/2009 for report/query consistency. (Reese)) Mitzi Read
7/1/1985 Preliminary Assessment Approved (Old R:Base Action Code = SI - Site Investigation). Alaska District conducted site investigations in July 1985 and September 1987. Water, soil, and POL samples were collected in 1985. Environmental and archaeological studies were conducted during both visits. Former Staff
4/3/1992 Site Added to Database Multiple contaminants. Former Staff
4/3/1992 Site Ranked Using the AHRM Initial ranking. Former Staff
6/22/1992 Update or Other Action (Old R:Base Action Code = SI - Site Investigation). Staff reviewed Pre-Design Final Report dated March, 1992. Report contains previous sampling data and defines regulatory levels for site contaminants. Laura Noland
6/24/1992 Meeting or Teleconference Held Met with Corps of Engineers and USF&WS to establish cleanup levels and cleanup methods for summer of 1993 work. The Corps plan to conduct remediation as they continue to define extend of contamination. Laura Noland
9/8/1992 Update or Other Action (Old R:Base Action Code = RPL2 - Site Information Request Letter). ADEC staff sent PRP-CS Database Notification letter to RP requesting update and more environmental information concerning contaminated site. Jim Levine\COE called 10-5-92 and responded by returning updated DECRPTs. Jeff Peterson
4/28/1993 Update or Other Action (Old R:Base Action Code = CORR - Correspondence (General)). Staff sent ADEC proposed action levels for cleanup at site to E&E's Brian Miskel. Marcus Ortelee
5/13/1993 Cleanup Level(s) Approved (Old R:Base Action Code = CORR - Correspondence (General)). ADEC staff sent a letter to Gail Braten of COE, on action levels for soil and gravel pad cleanup levels. ADEC and USFWS worked together to establish levels based on health and ecological criteria. Marcus Ortelee
8/27/1993 Update or Other Action Proposal document received. Bob Couch
3/1/1994 Cleanup Plan Approved (Old R:Base Action Code = RDRA - Remedial Design / Remedial Action). A removal action awarded for BD/DR and HTRW (DACA85-94-C-0010) and is still underway. Former Staff
3/18/1997 Update or Other Action Site updated by Shannon and Wilson, based on FUDS Site Summary dated 2/21/96. Former Staff
5/29/2001 Site Characterization Report Approved Sent comment letter today on draft removal action report. The report described demolition and site characterization work completed during July 2000. All of the structures were removed and disposed of off-site, surface stained soil was excavated, miscellaneous debris removed. Remaining contamination in sediments and soil. PCBs above 1 mg/kg is of concern along with cumulative risk from multiple VOCs. Comment letter indicated CSM should be completed and cumulative risk calculation should be completed. Concerns exist about a potential dump site at the DEW Line. Ann Farris
1/17/2003 Update or Other Action Staff received Draft No DOD Action Indicated Report today. Review is pending. Ann Farris
5/21/2003 Site Number Identifier Changed Changed Region from 36 to 31. Former Staff
8/1/2003 Update or Other Action Staff changed from Farris to Caillouet Debra Caillouet
8/27/2003 Update or Other Action Staff sent a letter to the Corp requesting additional information. Public comment had been recieved indicating that there may be risk remaining at the site. Until this is resolved DEC can not concur with the NDAI. Debra Caillouet
4/12/2004 Site Characterization Workplan Approved Sampling and Analysis Plan, Post-Remedial Action/Site Restoration Investigation, Collinson Point DEW Line Site was reviewed Debra Caillouet
10/14/2004 Meeting or Teleconference Held Staff attended RAB meeting in Kaktovik Debra Caillouet
1/25/2005 Meeting or Teleconference Held Staff attended RAB meeting in Kaktovik Debra Caillouet
3/23/2005 Site Characterization Report Approved Final Chemical Data Report was received and it incorporated response to comments. The analytical results from this sampling event show bottom sediments from both the Debris Pond and the AST pond are contaminated, as is the surface water in the AST Pond. Additionally, elevated levels of PCBs were found in concrete samples collected from the former Composite Building garage slab. The analytical results for samples collected from the Southwest Pond, Quonset Hut #3, and the surface soils surrounding the former Composite Building garage did not exceed ADEC cleanup criteria. The majority of the debris at Marsh Creek appeared benign, and was likely deposited by storm or ice action. Bottom sediment samples collected from the Debris Pond contained POL above the ADEC soil cleanup levels, as well as PCBs above the NOAA Probable Effects Level; due to the persistent nature of PCBs, it is unlikely that the concentrations of this contaminate will decrease significantly over time. The contaminated sediment in the Debris Pond is covered with a variety of metallic and wooden debris, which will need to be addressed is a removal action is determined to be required to close this site. Bottom sediment samples collected from the AST Pond contained POL above soil cleanup levels as well as low molecular weight PAH above the NOAA Upper Effects Threshold. Analytical results from this pond exceeded groundwater criteria, but no sheen was noted and TAH and TAqH were below 18 AAC 70 levels. Concrete samples from the surface of the former Composite building garage slab continued PCBs above 25 ppm. PCBs in surface soil samples collected from around the slab were below cleanup level, however previous results were above. Additional remedial/removal efforts may be required for this site, specifically at the Debris Pond, the AST Pond, and the former Composite Building garage slab. Although the landscape may appear blemished due to the presence of rusted 55-gallon drums and drum carcasses littered across the tundra the debris is not eligible for cleanup under FUDS. Debra Caillouet
5/3/2005 Meeting or Teleconference Held Staff attended RAB meeting in Kaktovik Debra Caillouet
7/20/2007 Update or Other Action Staff reviewed and sent comments to the USACE on the draft remedial investigation work plan. Debra Caillouet
9/27/2007 Update or Other Action Staff sent the USACE comment on Rev 1 of the RI work plan Debra Caillouet
10/11/2007 Exposure Tracking Model Ranking Debra Caillouet
10/26/2007 Site Characterization Workplan Approved final comments were addressed Debra Caillouet
12/26/2007 Update or Other Action Staff reviewed the draft remedial investigation report and prepared significant comments. Debra Caillouet
6/6/2008 Site Characterization Report Approved The final remedial investigation report for 2007 was approved. The report documents the use of silica gel cleanup that biased all DR) and RRO results low. The data can be used qualitatively to determine the remedial actions needed. Debra Caillouet
12/11/2008 Document, Report, or Work plan Review - other Staff reviewed and sent major comment to the Corps on the draft RI/FS. Debra Caillouet
1/13/2009 Exposure Tracking Model Ranking Initial ranking with ETM completed for source area id: 78686 name: Quonset Hut #3 Debra Caillouet
2/22/2010 Update or Other Action The Final Ecoscoping Forms and Ecological Conceptual Site Models, Collinson Point and Nuvagapak Point, DEW Line Stations, February 2010 were received. The ecoscoping indicates the need for a screening level risk assessment. Debra Caillouet
7/28/2010 Risk Assessment Report Approved The Final Preliminary Screening Evaluation and Ecological Conceptual Site Models, Collinson Point and Nuvagapak Point, DEW Line Stations July 2010 were approved. Based on the information in these documents ADEC does not believe there is a need to proceed to an ecological risk assessment. While some of the exceedances if the ecological screening levels are significant, if the sites are cleaned up to Method II levels these will be minimized. It is believed that if a full risk assessment was done, the size of the impacts and the quality of the habitat would demonstrate that there is no significant ecological risk. Debra Caillouet
10/29/2010 Document, Report, or Work plan Review - other Comments were sent on the Collinson Point Distant Early Warning Line Station, Revised Draft Remedial Investigation/Feasibility Study Report, October 2010 Debra Caillouet
7/28/2011 CERCLA FS Final Remedial Investigation/Feasibility Study Report Collinson Point Distant Early Warning Line Station, Collinson Point Alaska, May 2011 Debra Caillouet
5/20/2013 CERCLA ROD Approved PCBs are present in concentrations exceeding the ADEC Table B soil cleanup level, so further remedial action is necessary. An estimated area approximately 40 feet by 20 feet, with an assumed depth of 3 feet bgs, will require remedial action to mitigate risks due to PCBs. This equates to an estimated 88 cy of in-place PCB-contaminated soil. The data set suggests a moderate level of uncertainty regarding the extent and volume of PCB-contaminated media. PCB soil will be shipped off-site Debra Caillouet
5/20/2014 Document, Report, or Work plan Review - other Comments sent on the draft Remedial Action Work Plan Debra Caillouet
7/10/2014 CERCLA Remedial Design/Remedial Action Plan Approved Final Work Plan, Collinson Point and Nuvagapak Point Remedial Action Debra Caillouet
11/23/2015 Update or Other Action Site management transferred to Carnahan. John Carnahan
8/21/2016 Update or Other Action DEC approves (via email) modifications to workplan to extend the use of the available pad area to within 10 feet of the edge (with adequate berms), and increasing thickness of soil to be treated to 12 inches. DEC also will allow the use of fertilizers to enhance the nutrient viability of the soil if determined appropriate. John Carnahan
2/17/2017 Document, Report, or Work plan Review - other Provided comments on Draft RI Report for multiple sites. John Carnahan
11/16/2018 Document, Report, or Work plan Review - other Provide comments on FUDS Closeout Report. John Carnahan
1/7/2019 Cleanup Complete Determination Issued The Alaska Department of Environmental Conservation, Contaminated Sites Program (DEC) has completed a review of the environmental records associated with multiple sites associated with Collinson Point Former Distant Early Warning Station, located at Collinson Point, Alaska. The following sites closed in the Contaminated Sites database at the Station: 1. Collinson Point DEW Line AST (Aboveground Storage Tank) Pad and AST Pond 2. Collinson Point DEW Line Composite Building Area 3. Collinson Point DEW Line Quonset Hut #3 4. Collinson Point DEW Line Shop Building Area John Carnahan

Contaminant Information

Name Level Description Media Comments
PCBs - Total < Method 2 Most Stringent Soil

Control Type

Type Details
No ICs Required

Requirements

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

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