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Site Report: Murphy Dome AFS - WAA #3 (SS002)

Site Name: Murphy Dome AFS - WAA #3 (SS002)
Address: Murphy Dome LRRS, Murphy Dome Road, Fairbanks, AK 99709
File Number: 100.38.040
Hazard ID: 2922
Status: Active
Staff: Matthew Fleetwood, 9072697608 matthew.fleetwood@alaska.gov
Latitude: 64.955000
Longitude: -148.363611
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

Waste Accumulation Area Number 3 was used to store waste from the 1950s to the 1970s. Sample results indicate the presence of POL contamination. Staining can be observed at the site. IRP site SS02. Sample results can be found in the February 95 Draft RI report. Air Force Relative Risk Evaluation Worksheet dated 8/23/95 indicates overall site risk as MEDIUM. Receptors are human site workers and visitors and ecological receptors consist or land mammals and birds. Site entered by Shannon and Wilson.

Action Information

Action Date Action Description DEC Staff
2/1/1995 Update or Other Action (Old R:Base Action Code = RI - Remedial Investigation). Sample results for RI are contained in the February 1995 Draft RI Report. Former Staff
1/22/1997 Site Added to Database Site added by Shannon and Wilson. S&W
7/29/2005 GIS Position Updated Updated the site location in the database. Colin Craven
4/3/2008 Exposure Tracking Model Ranking Initial ranking with ETM completed. Colin Craven
4/11/2011 Document, Report, or Work plan Review - other Contaminated sites staff reviewed and sent comments on a draft Proposed Plan that presents final proposed remedial alternatives for five Installation Restoration Program sites at the Murphy Dome Long Range Radar Station. Tamar Stephens
3/20/2013 CERCLA ROD Approved DEC and the Air Force signed a ROD for this site. Lead contaminated soil (an estimated 2 cy, containing up to 600 mg/kg) will be excavated and transported off-site for proper disposal. The cleanup level for lead is soil is 400 mg/kg. John Halverson
4/1/2013 Update or Other Action ROD for LRRS Sites SS002 and LF003 recv'd by John Halverson in Anchorage on 3/28/2013 Susan Carberry
2/23/2015 CERCLA Remedial Action Completion Report DEC approves a draft report that presented the results of field screening of soil for lead, removal and disposal of lead-contaminated soil, soil sample confirmation by laboratory analytical results, and site restoration activities at SS02 site. Fifteen cubic yards of lead contaminated soil were removed. However, lead contaminated soil exceeding DEC Method two clean up levels (400 mg/kg) remained at the excavation extents, and additional lead sampling and removal were recommended in the report. In addition, petroleum hydrocarbon contamination above the record of decision (ROD) cleanup levels for the site were documented. The report task is listed in the DSMOA Joint Execution Plan as CERCLA - Remedial Action. Joy Whitsel
6/3/2020 Site Characterization Report Approved DEC approved the Final Supplemental Remedial Investigation Work Plan, Revision 1 for Murphy Dome LRRS. The work plan is intended to characterize the site, address data gaps, and fully delineate fuel contamination in soils and surface water at sites SS001 and SS007, as well as fully delineating lead contamination in soil at site SS002. This will be accomplished by site wide UVOST sampling, soil borings near lead impacted soil, and surface water grab samples if encountered. Tim Sharp
7/9/2020 Update or Other Action DEC approved a Field Change Form for lead soil characterization. The FCF focused on sampling soils from 0-2 ft bgs, and field screening further down, rather than sampling to 10 ft bgs or refusal. Further step out samples are proposed, as the amount of lead contamination was larger than expected. Tim Sharp
1/15/2021 Document, Report, or Work plan Review - other DEC received Draft Soil Investigation Report from work completed during summer 2020 Tim Sharp
1/25/2021 Document, Report, or Work plan Review - other DEC sent comments on Draft SI Report. Soil borings 019 and 025 show lead exceedances that may not be fully delineated. The report states there's approximately 30 cy of contaminated soil to be removed. Tim Sharp
8/16/2021 Site Characterization Report Approved DEC Approved the Final Soil Investigation Report. All lead exceedances are fully delineated by clean samples or bedrock. Removal of approximately 30 cy of soil will be undertaken in further field seasons. Tim Sharp
10/21/2021 Meeting or Teleconference Held USAF held a teleconference with DEC and CES (contractor) to discuss the overall plan for excavating lead contamination, adding stabilizing agent (Free Flow Technology), transporting and disposing of polluted soil to an appropriate landfill (in-state if at all possible to save costs), and backfilling. The draft UFP-QAPP is scheduled to be delivered to DEC early December 2021. Work will commence Summer 2022 after thaw, and the site is anticipated for close out in 2023 based on results from the removal action. Tim Sharp
1/25/2022 Document, Report, or Work plan Review - other DEC reviewed the Draft UFP-QAPP for the RA-C action at SS002. Lead contaminated soil will be excavated, stockpiled, and confirmation samples will be analyzed for total lead, TCLP, VOCs, and DRO and RRO. Contaminated soil will be transported and disposed of at Columbia Ridge Landfill in Arlington, Oregon. Comments regarded including Solid Waste in the TCLP review, updating lab accreditation, and step out sampling concerns. Tim Sharp
2/11/2022 Document, Report, or Work plan Review - other DEC approved the Final SS002 RA-C UFP-QAPP. Work is anticipated to start at the end of July 2022. Tim Sharp
6/13/2023 Document, Report, or Work plan Review - other DEC reviewed and approved the Technical Memorandum 2023 Additional Excavation Effort Murphy Dome Long Range Radar Station – Site SS002, Dated May 26, 2023. The technical memorandum describes the proposed excavation activities scheduled for June 2023 at the Murphy Dome Long Range Radar site located in Fairbanks, Alaska. The work will be conducted in accordance with the approved Final Uniform Federal Policy – Quality Assurance Project Plan (UFP-QAPP) dated February 2022. Additionally, all DEC regulations that have been updated since the UFP-QAPP was approved, will be incorporated into the scope of work. Ginna Quesada
11/7/2023 Document, Report, or Work plan Review - other DEC provided responses to comments regarding the redline Final Preliminary Assessment Report for Aqueous Film-Forming Foam Areas Murphy Dome Long Range Radar Site, Alaska, dated October 2023. Ginna Quesada
11/30/2023 Document, Report, or Work plan Review - other DEC reviewed and approved the Final Preliminary Assessment Report for Aqueous Film-Forming Foam Areas Murphy Dome Long Range Radar Site, Alaska, dated November 2023. Ginna Quesada
1/23/2024 Meeting or Teleconference Held Meeting with Air Force project manager to discuss the schedule for upcoming work in 2024. Ginna Quesada

Contaminant Information

Name Level Description Media Comments

Control Type

Type Details

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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
TDD: 800-770-8973
Physical Location: 410 Willoughby