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Site Report: Murphy Dome AFS - Bldg.1001 UST SS08

Site Name: Murphy Dome AFS - Bldg.1001 UST SS08
Address: Murphy Dome; Murphy Dome Road, Fairbanks, AK 99709
File Number: 100.26.087
Hazard ID: 24245
Status: Cleanup Complete
Staff: No Longer Assigned, 9074655229 dec.icunit@alaska.gov
Latitude: 64.951700
Longitude: -148.354500
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 1991 ADEC was informed that an inactive 2,000-gallon diesel fuel UST was located near Building 1001, the old White Alice Building at the Murphy Dome AFS. In 1993 the UST was removed and approximately 400 cubic yards of diesel soil contamination left in place. DRO was detected up to 3,400 mg/kg. This tank was formerly tracked in the Contaminated Sites Database under Reckey 199131X0101.

Action Information

Action Date Action Description DEC Staff
1/1/1991 Leaking Underground Storage Tank Release Confirmed - Petroleum LUST Site created in CSP for source area ID 77943 ADD; Former Staff
1/1/1991 Site Added to Database Former Staff
2/8/1993 Update or Other Action CORR; ADEC sent certified letter informing air Force that White Alice UST needs to undergo closure per 18 AAC 78. Former Staff
3/9/1993 Update or Other Action CORR; ADEC rec'd letter from Air Force stating intention to conduct tank closure on 2000 gal. UST near White Alice UST bldg. during summer 1993. Former Staff
3/23/1993 Update or Other Action MEET; Air Force informed ADEC that tank closure at Murphy Dome has rec'd funding. Work to begin summer 1993. Former Staff
7/9/1993 Leaking Underground Storage Tank Corrective Action Underway CAPR; Noland: Air Force submitted draft tank removal plan 7-9-93 and final plan submitted 7-12-93. Proposes removal of four USTs at Tin City and one at Murphy Dome LRRS. Former Staff
2/23/1994 Update or Other Action REM; Noland: Reviewed report of UST closure and site investigation at this sites by Air Force. Samples indicate DRO contamination exceeding cleanup levels. Air Force proposes placing site in IRP program to be addressed with other sites at the facility. Former Staff
2/25/1994 Leaking Underground Storage Tank Cleanup Initiated - Petroleum LCAU; Ongoing RI/FS activities at this site. : LCAU date changed DB conversion Former Staff
7/29/1994 Update or Other Action RI; Noland attended meeting where Air Force and contractor presented remedial investigation work plan, plans for community relations, and management action plan. Public meeting planned for 9/94. Former Staff
8/5/1994 Update or Other Action RI; Noland reviewed "Draft Work Plan, Remedial Investigation/Feasibility Study dated July 1994" and sent comments and requested revised work plan. Former Staff
10/17/1994 Risk Assessment RISK; ADEC sumitted comments for Human Health & Ecological Risk Assessment for Murphy Dome LRRS & Fort Yukon LRRS report dated 2/94. ADEC determined that risk assessment was not done according to EPA or state guidance and does not address future risk at sites. Former Staff
7/1/1996 Risk Assessment RISK; Stephens: Comments on the Risk Assessment Sections of the U. S. Air Force, 611th Engineer Squadron's Final Remedial Investigation Report, Murphy Dome LRRS, AK, received July 18, 1996. Former Staff
7/1/1996 Risk Assessment RISK; Stephens: Comments on the Risk Assessment Sections of the U. S. Air Force, 611th Engineer Squadron's Final Remedial Investigation Report, Murphy Dome LRRS, AK, received July 18, 1996. Former Staff
7/1/1996 Update or Other Action FS; Stephens: Final Feasibility Study, Murphy Dome LRRS, AK received August 8, 1996. Former Staff
7/1/1996 Update or Other Action FS; Steve Bainbridge: Draft, Feasibility Study, Murphy Dome LRRS, AK, received July 8, 1996. Former Staff
7/1/1996 Update or Other Action FS; Steve Bainbridge: Draft, Feasibility Study, Murphy Dome LRRS, AK, received July 8, 1996. Former Staff
7/1/1996 Update or Other Action FS; Stephens: Final Feasibility Study, Murphy Dome LRRS, AK received August 8, 1996. Former Staff
7/2/1996 Cleanup Level(s) Approved ACLA; Stephens: Draft Feasibility Study for Murphy Dome Long Range Radar Site, AK, received July 8, 1996. Former Staff
7/2/1996 Cleanup Level(s) Approved ACLA; Stephens: Draft Feasibility Study for Murphy Dome Long Range Radar Site, AK, received July 8, 1996. Former Staff
3/24/1997 Update or Other Action UPD; Site updated by Shannon & Wilson, based on the Air Force Relative Risk Evaluation Worksheet dated 8/23/95. Former Staff
6/3/2005 Update or Other Action Site visit of Murphy Dome IRP sites by Craven and Jaynes. Surface cover established in 2001 during the Interim Removal Action appears stable. Mitzi Read
6/6/2005 Update or Other Action Demolition of the White Alice Building (#1001) in 2001 included removal of the old septic tank northwest of where the UST was located. Excavation of the septic tank may have removed or redistributed some of the soil contamination left in place after the 1993 UST removal. The 611th CEVO stated that any removal would have been by accident, as it wasn’t part of the 2001 Interim Removal project scope. Mitzi Read
6/10/2005 Update or Other Action Updated the location of the former UST. Colin Craven
3/20/2008 Exposure Tracking Model Ranking Intitial Ranking Complete for Source Area: 77943 (Autogenerated Action)
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. The proposed alternative for SS008 is no further action / cleanup complete. Tamar Stephens
2/20/2013 Cleanup Complete Determination Issued Closure letter sent with Corrective Action Complete Determination under 18 AAC 78 Storage Tank Regulations and Cleanup Complete under 18 AAC 75 Article Three. The 2,000 gallon underground storage tank (UST) and associated piped were removed in 1993. Sampling of the excavation detected DRO at a maximum concentration of 3,437 mg/kg, and GRO at a maximum concentration of 167 mg/kg. Additional investigation was performed during a remedial investigation in 2004. Soil borings downgradient of the tank site showed no evidence of off-site migration of contaminants. The migration to groundwater pathway is not complete at this site; therefore the Method 2, Table B2 soil ingestion and soil inhalation cleanups apply. Maximum concentrations detected at the site are below the Method 2 cleanup levels for soil inhalation and soil ingestion. There is not significant risk to human health or the environment, and this site meets the criteria for closure. Tamar Stephens
2/20/2013 Exposure Tracking Model Ranking A new updated ranking with ETM has been completed for source area 77943 UST. Tamar Stephens

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.

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