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Site Report: FAA Summit Flight Service Station

Site Name: FAA Summit Flight Service Station
Address: ~Mile 201 Parks Highway, ~9 Miles S. of Cantwell, Cantwell, AK 99729
File Number: 150.38.031
Hazard ID: 310
Status: Active
Staff: Jenny Gates, 9072628203 jenny.gates@alaska.gov
Latitude: 63.331035
Longitude: -149.129614
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

In 1987, approximately 7,000 gallons of diesel spilled in the basement of the former Flight Service Station facility (FSS) as a result of a leak in a fuel line. The spilled fuel entered a floor drain leading to a septic tank, wooden crib, and a concrete leach tank. Approximately 3,300 gallons of diesel was recovered from the tanks and soils during 1987. In 1988 the area was graded, leveled, and reseeded. The FSS building was demolished or burned down in 1990. The 1992 Environmental Compliance report suggests PCBs, asbestos, and diesel as potential contaminants of concern. Removal of friable asbestos prior to demolition is unknown, debris was buried in the basement and covered over. A 1995 Site Cleanup and Investigation Report indicates that field screening of surface and subsurface (4 soil borings) and 2 laboratory samples taken in the location of the former FSS building did not detect significant contamination. 31 field screening samples were collected from a grid in an area of visibly stressed vegetation in the lot of the FSS facility; testing did not detect significant contamination. Over the years, numerous monitoring wells have been installed/repaired/decommissioned. As of 2022, there are 18 remaining wells sitewide. There are 5 MWs in the area of the FSS, 2 of them had levels of DRO of 1,800 ug/L and 3,700 ug/L.

Action Information

Action Date Action Description DEC Staff
2/14/2000 Site Added to Database Petroleum hydrocarbon contamination. Eileen Olson
4/21/2000 Site Ranked Using the AHRM Initial ranking. Eileen Olson
3/18/2008 Update or Other Action 1992 Environmental Compliance report suggests PCBs, asbestos, and diesel as potential contaminants of concern. The building was demolished or burned down in 1990. Removal of friable asbestos prior to demolition is unknown, debris was buried in the basement and covered over. A 1995 Site Cleanup and Investigation Report indicates that field screening of surface and subsurface (4 soil borings) and 2 laboratory samples did not detect significant contamination. Kim DeRuyter
3/18/2008 Exposure Tracking Model Ranking Initial ranking with ETM completed. Kim DeRuyter
5/18/2010 Exposure Tracking Model Ranking Site renamed to Flight Service Station Bldg and Lot. James Ward
6/8/2010 Document, Report, or Work plan Review - other Staff reviewed and provided comments on the Draft Site Investigation Work Plan James Ward
8/2/2010 Site Characterization Workplan Approved Staff conditionally approved the July 2010 Site Investigation Work Plan, detailing sampling efforts at this site. FAA will collect samples for use in the Hydrocarbon Risk Calculator. James Ward
9/10/2010 Offsite Soil or Groundwater Disposal Approved Staff approved the off site transport and treatment of an estimated 1.5 cy of diesel contaminated soil to Alaska Soil Recycling James Ward
9/6/2011 Site Characterization Workplan Approved Staff approved an addendum to the 2010 Site Investigation Work Plan. Efforts to collect groundwater samples in 2010 had limited success. The addendum approves no-purge sampling for collection of groundwater samples in 2011. James Ward
9/8/2011 Offsite Soil or Groundwater Disposal Approved Staff approved off-site transport and disposal of soil cuttings from monitoring well excavations. Soil was transported to Alaska Soil Recycling. James Ward
8/23/2012 Document, Report, or Work plan Review - other Staff reviewed and provided comments on the May 2012 Draft Site Investigation Report, detailing results of a site investigation effort during 2010 and 2011. James Ward
8/6/2014 Site Characterization Report Approved Approved the Final Site Investigation Report presenting the results of investigation and characterization activities completed at 21 areas of concern in 2010 and 2011. Petroleum contaminants were detected in the groundwater above the cleanup level at 10 of the areas of concern, and additional groundwater monitoring and evaluation is recommended to determine if the shallow groundwater encountered is pore water infiltration accumulating in the monitoring wells. Additional investigation is recommended at one area of concern to address soil contamination associated with the use of chlorinated herbicides, and the remaining 10 areas of concern are recommended for cleanup complete status. Keri DePalma
8/8/2014 Update or Other Action Staff changed from Fred Vreeman to Keri DePalma Keri DePalma
8/27/2015 Update or Other Action Discussed site status with FAA project manager. Anticipate draft report in September or October of 2015. Joy Whitsel
5/4/2016 Site Characterization Report Approved DEC approved Follow-on Site Investigation Report for FAA Summit Station. There were two primary objectives for the follow-on site investigation activities: 1) to further delineate the extent of petroleum contamination at the Summit FAA Station and 2) to determine the nature of the subsurface water at the site. The report concluded that the subsurface water monitored at the Summit FAA Station is not expected to transport any contaminants to nearby surface water or drinking water sources which have been located a minimum of approximately 5 miles away. Joy Whitsel
2/6/2017 Meeting or Teleconference Held DEC met with FAA and contractors to discuss steps necessary for closure. For Former Housing North (HazardID 26620) HRC results will be accepted. For areas of concern (AOCs) where contamination of groundwater or infiltrating subsurface water is present, DEC agrees to review groundwater modeling that proposes to demonstrate that the contamination plume is at equilibrium. Calculation of cumulative risk will be based on source area and assessed on a site by site basis. Regarding establishment of institutional controls (ICSs) at the site, DEC is concerned that the landowner Alaska Dept of Transportation (ADOT) lacks an existing mechanism for tracking and maintaining ICs. Future coordination between the FAA, ADEC and the ADOT will be necessary have to successfully implement ICs restricting groundwater usage. Joy Whitsel
3/19/2021 Document, Report, or Work plan Review - other Received Draft Summit FAA Station Long Term Monitoring Report dated February 2021. DEC comments sent March 4, 2021. RTC received March 12, 2021.Approval sent 5/27/21. Shonda Oderkirk
3/6/2024 Document, Report, or Work plan Review - other Oderkirk received Draft FAA Summit Site Investigation and Groundwater Monitoring Work Plan, 10.04.2023; ADEC comments sent 10.12.2023; FAA RTCs received 01.08.2024; ADEC received the final work plan document 03.06.2024. ADEC work plan approval letter sent to FAA on 03.08.2024. Jenny Gates

Contaminant Information

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Description Details

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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
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