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Site Report: Lonely AFS Dewline - Hangar Pad SS13

Site Name: Lonely AFS Dewline - Hangar Pad SS13
Address: Point Lonely, Nuiqsut, AK 99789
File Number: 320.38.004
Hazard ID: 2925
Status: Cleanup Complete
Staff: No Longer Assigned, 9074655229 dec.icunit@alaska.gov
Latitude: 70.909890
Longitude: -153.237462
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 hangar pad area was operational from 1955 to 1989. Contaminants associated with the area are fuels. The extent of contamination is unknown. The 1993 RI indicated that low levels of petroleum were detected. BTEX was detected in two surface water samples. IRP site SS013. Exposure pathways identified as inhalation/ingestion of soil/dust and ingestion of surface water for humans and other mammals; ingestion of surface water and sediment for birds. Potential receptors identified as Inupiat subsistence hunters and fishermen, mammals, and birds. The site was assigned a HIGH overall risk on the Air Force Relative Risk Evaluation Worksheet dated 9/2/95. Site entered by Shannon and Wilson. A 2005 Remedial Investigation showed petroleum in soil was below the Method 2 arctic zone cleanup levels, and no advers impacts were detected in adjacent surface water. PCBs were detected in soil beneath a transformer stand in excess of the cleanup level of 1 mg/kg. Cleanup of the soil beneath the transformer stand was completed in 2008; confirmation results were non-detect for PCBs.

Action Information

Action Date Action Description DEC Staff
9/2/1995 Update or Other Action (Old R:Base Action Code = RI - Remedial Investigation). Action date used is the date of the Air Force Relative Risk Evaluation Worksheet, which indicates the site is in the RI phase. Former Staff
3/3/1997 Site Added to Database Site added by Shannon and Wilson. S&W
2/6/2003 Site Number Identifier Changed Changed the Region from 36 to 31. Former Staff
6/1/2005 Site Ranked Using the AHRM Initial site ranking. Emily Youcha
6/1/2005 Site Characterization Workplan Approved Staff approved a remedial investigation/feasibility study workplan for the site. Work will be conducted in July/August 2005. Samples will be collected for DRO/RRO, GRO, BTEX,VOCs, PCBs, and PAHs. Emily Youcha
7/25/2005 Update or Other Action Staff attended a site visit to Pt Lonely AFS on July 18 with BLM representatives. Emily Youcha
7/29/2005 Meeting or Teleconference Held Contaminated Sites staff is working with the Air Force on creating a template for ecological and human health risk assessments covering six sites across the North Slope, including this site. The Air Force determined it needs to conduct base-line risk assessments at these sites prior to making cleanup decisions on them. Developing a template is an effort to make the process more efficient. Emily Youcha
12/8/2005 Meeting or Teleconference Held Staff attended the Restoration Advisory Board meeting in Barrow and provided a summary of the current activites at the site. Emily Youcha
3/21/2006 Update or Other Action Staff received a copy of the 2005 draft RI/FS. Staff participated in a meeting with the BLM and the Air Force on February 17 to discuss the status of Pt. Lonely and a potential transfer of the Air Force Buildings to the North Slope Borough. Emily Youcha
5/15/2006 Update or Other Action Staff reviewed the RI/FS for this site. DRO was detected in the soil in 3/6 samples above Method One soil cleanup levels, but below Method Two soil cleanup levels. One sample indicated that PCBs exist above the 1 ppm soil cleanup level. Air Force is recommending removal of the PCB-contaminated soil. Emily Youcha
5/26/2006 Update or Other Action Contaminated Sites staff recently obtained term contractor review of a draft Air Force North Slope Risk Assessment Work Plan (RAWP). Comments were received from the term contractor, and a comment review teleconference was held with the term contractor risk assessor on 5/10/06. The RAWP seeks to develop risk based cleanup levels based on exposure pathways for categories of sites (e.g., garage sites) at Air Force radar stations in the north slope region. The work plan is generally well written, but some of the key items that need clarification are how data gaps will be handled at individual sites; determination of background levels for organics and inorganics; how it will be determined whether a large water body is potentially affected by a site; and how toxicity will be determined for trichloroethylene. Emily Youcha
7/11/2006 Meeting or Teleconference Held Staff performed a site visit to Pt. Lonely with the North Slope Risk Assessment team. Sites SS03 and SS02 are included as template sites, but nearly all sites at Pt Lonely were visited. The former location of the pumphouse was identified and has not yet eroded into the ocean. The coast continues to erode, particularly in the vicinity of the former Sewage Outfall site and little beach remains for vehicle or foot travel on the beach in that area. Emily Youcha
8/3/2006 Update or Other Action Contaminated Sites staff received a workplan from the Air Force for sampling and analysis at Point Lonely Short Range Radar Station. A background metals study was planned, however, only two samples were to be collected from the tundra soil and only one sample from the beach gravel. Staff recommended taking multi-increment samples for the study, however, the selected laboratory will not analyze the recommended 25-30 grams of sample. Additionally, the Air Force is going to sample the inside of the Hanger. The Air Force was planning to collect only four grid samples from the large Hangar to determine whether contamination was present, although no contamination was observed during field screening. Staff recommended the multi-increment approach or random sampling using Visual Sample Plan, but since metal flooring remains in the Hangar, it will be difficult to collect so many samples. Emily Youcha
8/18/2006 Meeting or Teleconference Held Contaminated Sites staff met with the Air Force and the Bureau of Land Management (BLM) to discuss the upcoming cleanup at Point Lonely Air Force Station. This site is located in a right-of-way on BLM property and the Air Force has to meet several environmental requirements before relinquishing the property. The Air Force requested to re-open a permitted landfill at Point Lonely for one time use to deposit demolition debris and low-level petroleum-contaminated soil. BLM is hesitant to approve it because landfills built on BLM property are not consistent with their policy. Emily Youcha
5/14/2007 Exposure Tracking Model Ranking Intitial Ranking Complete for Source Area: 78204 (Autogenerated Action)
5/14/2007 Exposure Tracking Model Ranking Intitial Ranking Complete for Source Area: 78203 (Autogenerated Action)
7/11/2007 Exposure Tracking Model Ranking Intitial Ranking Complete for Source Area: 78205 (Autogenerated Action)
10/13/2007 Meeting or Teleconference Held DEC staff attended Barrow Restoration Advisory Board meeting. Tamar Stephens
10/25/2007 Meeting or Teleconference Held DEC staff attended Barrow Restoration Advisory Board meeting. Tamar Stephens
12/11/2007 Risk Assessment Report Approved ADEC received the Final Risk Evaluation Report – Alaska North Slope Radar Installation Sites on November 6, 2007. This report meets the requirements of the ADEC Contaminated Sites Program Risk Assessment Procedures Manual, adopted by reference in 18 AAC 75.340. An approval letter was sent to Dave Cook, Program Manager HQ PACAF/A7NR, on December 10, 2007 This project identified categories of sites that are common on remote Air Force installations in the North Slope region of Alaska and developed conceptual site models and human health and ecological risk based screening levels for four of these categories: garage sites, fuel storage sites, non-fuel storage sites, and transformer sites. The project developed templates for conducting human health and ecological risk evaluations for these categories and performed a risk evaluation as a test case for one example of each type of site. The final report contains guidance on applying the process to other North Slope region sites. It may be used on a site-specific basis as a tool to assist in assessing potential risks posed by North Slope Air Force installation sites. Tamar Stephens
12/13/2007 Public Notice Public meeting was held in Barrow to present Proposed Plan. Public comment period: 12/13/2007 - 1/11/2008. DEC contaminated sites staff attended. Tamar Stephens
5/2/2008 Document, Report, or Work plan Review - other Contaminated sites staff reviewed and sent comments on a draft decision document. Tamar Stephens
7/10/2008 Meeting or Teleconference Held DEC staff attended Barrow Restoration Advisory Board meeting. Tamar Stephens
7/30/2008 Cleanup Plan Approved Staff reviewed and approved the Draft Quality Assurance Program Plan for 2008 Clean Sweep Activities (Cleanup Plan) for USAF Point Lonely SRRS. This work plan describes the cleanup activities that will be conducted at the Point Lonely SRRS during 2008. Cleanup activities specific to the Hangar Pad site consist of excavation of PCB contaminated soil from underneath a transformer stand, and offsite disposal in a treatment, storage, or disposal facility. Tamar Stephens
8/29/2008 CERCLA ROD Approved Decision document signed. Decision document was signed by Colonel Brent Johnson, USAF, on 8/27/2008 and by DEC Environmental Program Manager John Halverson on 8/29/2008. The decision document specifies excavation of PCB contaminated soil beneath the transformer stand that exceeds the Method 2 cleanup level of 1 mg/kg, and disposal in an off-site treatment, storage, or disposal facility. Tamar Stephens
8/29/2008 Cleanup Level(s) Approved Cleanup levels were approved with signing of the Decision Document on 8/29/2008. Cleanup levels are the Method Two Arctic Zone cleanup levels from 18 AAC 75.341 Tables B1 for PCBs of 1 mg/kg. Tamar Stephens
10/13/2008 Meeting or Teleconference Held DEC staff attended Barrow Restoration Advisory Board meeting. Tamar Stephens
3/12/2009 Meeting or Teleconference Held DEC staff attended Barrow Restoration Advisory Board meeting. Tamar Stephens
6/12/2009 Document, Report, or Work plan Review - other Staff reviewed and sent comments on the Draft Quality Assurance Program Plan (cleanup work plan) for 2009 Clean Sweep Activities at the U.S. Air Force Point Lonely Short Range Radar Station, Alaska. Tamar Stephens
7/17/2009 Cleanup Plan Approved Staff approved the Final Quality Assurance Program Plan (Cleanup Plan) for 2009 Clean Sweep Activities. Tamar Stephens
12/13/2009 Meeting or Teleconference Held DEC staff attended Barrow Restoration Advisory Board meeting. Tamar Stephens
3/18/2010 Meeting or Teleconference Held DEC staff attended Barrow Restoration Advisory Board meeting. Tamar Stephens
4/21/2010 Document, Report, or Work plan Review - other Staff reviewed and sent comments on the Draft Cleanup Report for 2008-2009 Clean Sweep Activities, Point Lonely Short Range Radar Station, Alaska. This report describes cleanup actions that were performed during 2008 and 2009 at the Point Lonely Short Range Radar Station. Tamar Stephens
6/17/2010 Meeting or Teleconference Held DEC staff attended Barrow Restoration Advisory Board meeting. Tamar Stephens
3/17/2011 Meeting or Teleconference Held DEC staff attended Barrow Restoration Advisory Board meeting. Tamar Stephens
10/13/2011 Meeting or Teleconference Held DEC project manager Tamar Stephens attended Barrow Restoration Advisory Board meeting. Tamar Stephens
11/7/2011 Exposure Tracking Model Ranking A new updated ranking with ETM has been completed for source area 78203 Transformer Area. Tamar Stephens
11/7/2011 Exposure Tracking Model Ranking A new updated ranking with ETM has been completed for source area 78205 Diesel Tank. Tamar Stephens
11/7/2011 Exposure Tracking Model Ranking A new updated ranking with ETM has been completed for source area 78204 Interior Area. Tamar Stephens
11/9/2011 Final Cleanup Report Reviewed Contaminated Sites staff reviewed and approved the final Cleanup Report for 2008 – 2009 Clean Sweep Activities. The report documents the excavation, transport, and off-site disposal of PCB contaminated soil from the beneath the transformer stand. Confirmation samples were non-detect for PCBs. Tamar Stephens
11/9/2011 Cleanup Complete Determination Issued Cleanup of this site is documented in the final Cleanup Report for 2008-2009 Clean Sweep Activities at Point Lonely Short Range Radar Station, Alaska (June 2010). According to the report, in 2008 0.5 yd3 of PCB soil was excavated by hand, contained in a supersack, and transported offsite for disposal at an approved facility. Confirmation sampling results did not detect any remaining PCBs. DEC received final documentation confirming that the soil was properly disposed in a permitted facility. DEC has determined that the cleanup and disposal components specified in the Decision Document have been completed. Staff updated the Environmental tracking model and sent a letter to the Air Force with the cleanup complete determination. Tamar Stephens
11/9/2011 Institutional Control Record Removed Institutional Controls have been removed. Tamar Stephens

Contaminant Information

Name Level Description Media Comments
PCBs - Total < Method 2 Most Stringent Soil Following cleanup, confirmation samples were non-detect for PCBs.
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.

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