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Site Report: Fort Greely Old Post MOGAS Fuel Line

Site Name: Fort Greely Old Post MOGAS Fuel Line
Address: Old Post 6th Avenue, Fort Greely, AK 99731
File Number: 141.38.058
Hazard ID: 4253
Status: Active
Staff: Tim Sharp, 9074512131 tim.sharp@alaska.gov
Latitude: 63.987322
Longitude: -145.720609
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 arctic grade diesel fuel (DFA) and motor gasoline (MOGAS) pipeline was an abandoned 3-inch diameter fuel supply line within the Old Post area of Fort Greely, Alaska. In 2008 an investigation along the entire abandoned pipeline was conducted. The 2008 investigation identified two areas of petroleum contamination; Test Pit 31 and Test Pit 41. In 2010 1,800 linear feet of the pipeline was removed, and additional investigation work was conducted at Test Pit 31 and Test Pit 41. Diesel range organics (DRO) was identified in the subsurface soil above DEC’s Table B2 migration to groundwater cleanup level at approximately 15 feet (ft) below ground surface (bgs) in both of the test pits. Additional soil borings were drilled in 2011 to further define the vertical extent of the petroleum contamination at the two test pit areas. The soil boring drilled south of the 2010 excavation of Test Pit 31 identified DRO and 2-methylnaphthalene extending to depths of approximately 25 ft bgs. The soil boring drilled to the south of the 2010 excavation of Test Pit 41 did not identify any exceedances. Because there is still petroleum contamination in the soil above DEC’s Table B2 migration to groundwater cleanup level that has not been horizontally delineated, further work will need to be conducted to define both the lateral and vertical extents of contamination identified at Test Pit 31 and Test Pit 41. The approximate depth to groundwater in the Fort Greely area is around 200 ft bgs. The corresponding Army HQAES site number is 02341.1081.

Action Information

Action Date Action Description DEC Staff
6/1/2006 Site Ranked Using the AHRM Initial Ranking Emily Youcha
6/1/2006 Update or Other Action Staff received 2005 RI/FS for this site. Contamination was identified during soil gas surveys in 2004 and sampling and analysis was performed in 2005. 2005 soil boring #41 (located adjacent to BRAC 102) and associated satellite borings indicate the presence of diesel range organics (DRO), gasoline range organics, and bezene contamination in the soil above DEC soil cleanup levels. Contamination appears to extend to depths up to 180 feet below ground surface(bgs), but contamination was not found above migration to ground water cleanup levels below 60 feet bgs. 2005 soil boring #42, located near the intersection of 6th Avenue and Evergreen Road, indicated DRO contamination exceeds cleanup levels to about 30 feet bgs. Emily Youcha
6/1/2006 Site Added to Database Site added to the database. Mitzi Read
5/22/2007 Meeting or Teleconference Held Staff attended Interagency Coordination Meeting in Fairbanks. A summary of the past years and future remedial efforts was provided. Zachary Richter
5/23/2007 Meeting or Teleconference Held ADEC Staff attended a RAB meeting held in Delta Junction. The past years work at Fort Greely was summerized and future work projects were presented. Work at the North and South Tank Farms was highlighted. Zachary Richter
5/23/2007 Update or Other Action The Alaska Department of Environmental Conservation (ADEC) received the Groundwater Monitoring and Data Analysis Work Plan Fort Greely, Alaska on April 27, 2007. This work plan abides by the 2005 Final Work Plan with modifications to the wells and analytical parameters to be monitored particularly the addition of polycyclic aromatic hydrocarbon analysis at monitoring wells MW-12, MW-13, and MW-14. Additionally, the pump type used in sampling the monitoring wells will be changed by replacing the Grundfos Ready Flow pump with a QED Sample Pro 1.75 inch bladder pump and QED MP10 controller, or equivalent. All other sampling methodology will remain the same as the 2005 Final Plan. The final modification to the 2007 Work Plan is the addition of Volatile Organic Analysis/1,2-dibromoethane monitoring at drinking water wells ECP2 and ISFAC at the missile field. An updated list of wells to be monitored, and the parameter for analysis from each well, for upcoming sampling events has been provided to replace Table 5 of the 2005 Final Work Plan. ADEC has completed its review of this document and has found that the Groundwater Monitoring and Data Analysis Work Plan Fort Greely, Alaska for 2007 adequately meets the requirements set forth in 18AAC75.355, and with the addition of the previously agreed upon amendment, this work plan is approved. Zachary Richter
7/2/2007 Update or Other Action The Alaska Department of Environmental Conservation (ADEC) has completed its assessment of the environmental laboratory data and quality assurance requirements as set forth in ADEC Technical Memorandum 06-002 for the Groundwater Monitoring 2006 Analytical Data Report Fort Greely, Alaska, February 2007. The report adequately addresses the requirements set forth by ADEC for both laboratory data packages and Quality Assurance (QA) Summaries, therefore the report is approved. Zachary Richter
1/7/2008 Exposure Tracking Model Ranking Initial ranking with ETM completed. Deborah Williams
11/5/2008 Meeting or Teleconference Held ADEC staff participated in the Restoration Advisory Board meeting for Fort Greely in Delta Junction. During the meeting, Glen Shonkwiler with the United States Army Space and Missile Defense Command presented the fieldwork that was completed during the 2008 field season at Fort Greely. The 2008 fieldwork included remediating the soil in the biocell at the South Tank Farm (STF); conducting further delineation of the subsurface soils at the STF; installing four groundwater monitoring wells in the Old Post area and downgradient of the STF; completing the investigation at the MOGAS fuel line in the Old Post area; conducting additional survey of the Jarvis Creek Munitions Burial site; and conducting additional investigation of the Building 675 vault. He also presented the work that was planned to be completed during 2009. Deborah Williams
10/21/2009 Document, Report, or Work plan Review - other ADEC staff reviewed the document titled Draft 2008 Groundwater Monitoring and Data Analysis Report, Fort Greely, Alaska, dated March 2009. The Fort Greely groundwater monitoring program consists of monitoring wells that were installed during investigation activities on FGA from 1997 to the present. DEC approved a comprehensive groundwater monitoring approach in the 2005 Work Plan. Yearly modifications to the 2005 workplan are incorporated as needed to address environmental program objectives. Monitoring well locations and sampling frequency have been chosen to provide site specific monitoring where necessary, and comprehensive coverage for the old post and main cantonment areas of Fort Greely. Currently, a total of 30 wells are included in the groundwater monitoring program: 11 of these are sampled during the spring and fall on even numbered years, two drinking water wells are sampled quarterly, and 17 monitoring wells are sampled semi–annually. This report summarizes the 2008 groundwater monitoring efforts. A letter detailing staff comments has been provided to the Army. Tana Robert
11/13/2009 Document, Report, or Work plan Review - other Staff reviewed and provided comments on the document titled DRAFT 2008 COMPLIANCE CLEANUP SITES ANNUAL REPORT: MOGAS/DFA Fuel Line at Old Post (BRAC Sites 134, 96, 97, 98, 99, and 100); Building 163 and Former UST Tank Farm (BRAC Site 94); Building 100 Drum Storage (BRAC Site 92); Evergreen Road POL Yard (BRAC Site 102); Dry Wells Located at Buildings 628, 612, and 675 (BRAC Sites 57, 135, and 54); Preconstruction Environmental Survey for Proposed CAC Site FORT GREELY, ALASKA (April 2008) prepared for the US Army Space and Missile Defense Command by ASTS Incorporated. Tana Robert
7/23/2010 Site Characterization Workplan Approved Approved 2010 IRP Work Plan, which includes the removal of the Old Post MOGAS/DFA Pipeline. Two parallel 3-inch lines originate at former Building 163, near D Street, and lead north to the airfield. One of the lines makes a 90 degree bend 200 feet north of Building 163, and is blinded off at former Building 152, near C Street and 5th. A second 3-inch line leads north along the west side of 5th and makes a 90 degree turn west at B Street. It runs parallel to B Street and ends at Building 101, at B Street and 3rd Avenue. Melody Debenham
9/4/2013 Document, Report, or Work plan Review - other Approved the final groundwater sampling work plan for Ft. Greely. As part of the multi-year, post-wide groundwater monitoring program, groundwater samples will be collected from 35 wells. Melody Debenham
4/29/2015 Meeting or Teleconference Held Attended Restoration Advisory Board Meeting. Proposed work in 2015 includes post-wide groundwater monitoring, decommissioning unused monitoring wells, developing a Land Use Control and Long Term Maintenance Plan, and completing propose plans/no further action documents for 51 sites. Melody Debenham
8/28/2015 Document, Report, or Work plan Review - other Approved the Final 2015 Groundwater Monitoring and Data Analysis Work Plan Addendum for long-term post-wide groundwater monitoring at Fort Greely. Groundwater samples will be collected from 25 monitoring wells and 5 supply wells. Melody Debenham
9/2/2015 Document, Report, or Work plan Review - other Approved the Final 2014 Groundwater Monitoring and Data Analysis Report documenting the 2014 post-wide groundwater monitoring activities at Fort Greely. Analytical results from four monitoring wells at the BRAC 94 site were above cleanup levels for diesel range organics, gasoline range organics, and/or benzene. Results from one monitoring well at the South Tank Farm site were above the cleanup level for ethylene dibromide. All other results were either non-detect or below the cleanup level, including all supply well results. Melody Debenham
9/29/2015 Exposure Tracking Model Ranking A new updated ranking with ETM has been completed for source area 75219 Former Fuel Line. Melody Debenham
1/17/2024 Document, Report, or Work plan Review - other DEC has reviewed the Environmental Summary Report (ESR) for the Motor Gasoline/Diesel Fuel Arctic (MOGAS/DFA) Fuel Line Site, which details the historical records, environmental investigations, and remedial actions for the MOGAS/DFA Fuel Line site in an effort to evaluate the remaining contamination and data gaps present to determine if the site is eligible for a cleanup complete determination or if further remedial action is required. Clarification regarding which sites included in the ESR were being recommended for further action/cleanup complete was requested. Tim Sharp

Contaminant Information

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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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