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Site Report: Fort Greely Former Fire Training Area BRAC 133


Site Name: Fort Greely Former Fire Training Area BRAC 133
Address: Allen Army Airfield, Fort Greely, AK 99731
File Number: 141.38.002
Hazard ID: 4246
Status: Active
Staff: Melinda Brunner, 9074515174 melinda.brunner@alaska.gov
Latitude: 63.988381
Longitude: -145.715673
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

Old fire training area south of Allen Army Airfield, to the west of BRAC 85 fire training areas. The following analytes, not attributable to background, exceeded ADEC Method Two cleanup levels: DRO, 1,2 Dibromoethane, methylene chloride, HCH-alpha, 4,4-DDT, 4,4-DDD, endrin, and antimony. DRO, 1,2 Dibromoethane, methylene chloride, HCH-alpha, endrin and antimony exceeded only the ADEC Method Two migration to groundwater cleanup level. 4,4-DDD exceeded only the ADEC Method Two ingestion cleanup level. 4,4-DDT exceeded both the ADEC Method Two migration to groundwater and ingestion cleanup levels. Cumulative residential risk and hazard index exceeded the ADEC targets of 1x10-5 and 1.0, respectively. Site characterization has included drilling and sampling of 10 soil borings ranging in depth from 11 to 32 feet below ground surface (bgs), for a total of 187 feet of drilling. The upper 5 feet of impacted soil in the former fire training pit area were landfarmed by trenching, irrigating, turning, and backfilling the contaminated soil. Soil samples were collected from the site intermittently to monitor the progress of remediation. Additional sampling and evaluation were conducted in 1998 under the former Base Realignment and Closure (BRAC) program.

Action Information

Action Date Action Description DEC Staff
11/1/1991 Preliminary Assessment Approved Sampling of three former fire training pits located approximately 2,000 feet from Jarvis Creek found DDT, dioxins and VOCs in the subsurface (5 feet - 14feet). Surface samples need to be taken and extent of contamination determined. Background sample contaminated with DDT. No Longer Assigned
12/12/1991 Site Ranked Using the AHRM Initial ranking. No Longer Assigned
12/13/1991 Site Added to Database Pesticides, dioxin, and VOC soil contamination. No Longer Assigned
6/9/1992 Update or Other Action (Old R:Base Action Code = SI - Site Investigation). Final investigation by E&E, Fort Wainwright, Fort Richardson, and Fort Greeley in one report. Ronan Short
10/7/1992 Preliminary Assessment Approved Received "Preliminary Assessment, Fort Greely, Alaska, Draft" prepared by CH2M Hill to determine source areas for CERCLA. No Longer Assigned
6/9/1993 Update or Other Action (Old R:Base Action Code = RECN - Site Reconnaissance (CS)). Visit by COE and OHM Corporation 6-9-93. A possible removal action may be proposed by Army due to high DDT (700 ppm). Cleanup level is 2 ppm (note: 1 ppm is proposed by USFWS). Ronan Short
10/15/1993 Update or Other Action (Old R:Base Action Code = SI - Site Investigation). Site Investigation Project Report. Fort Wainwright FTPs removed from this contract. Reports mainly TPH at Fort Greely, but some DDT at depth 11 feet of approximately 250 ppm. Also low levels of dioxins 2 pptrillion. Report recommends soil washing, low temperature thermal desorption, and off-site land disposal. Query Action levels page ES2-3. Ronan Short
5/16/1994 Update or Other Action (Old R:Base Action Code = RPL2 - Site Information Request Letter). Sent PRP-CS Database Notification Letter to Cristal Fosbrook requesting update/confirmation of information concerning the contaminated site. Jeff Peterson
3/26/1997 Update or Other Action Site updated by Shannon and Wilson, based on the Army Defense Site Environmental Restoration Tracking System Worksheet dated 11/8/96. The worksheet indicates soil contamination by lead at 120 ppm, DDT at 0.23 ppm, and 2,3,7,8-TCDD at 4 ppm (Fort Wainwright checking to see if this number is accurate), and states that soil could leach into groundwater. S&W
1/3/2001 Update or Other Action Site is under investigation under the BRAC process for Fort Greely. A proposed plan is expected from the Army early in 2001. Greg Light
3/2/2001 Update or Other Action Changed the DoD Rank to Medium from High per “Army Defense Site Environmental Restoration Tracking System Worksheet dated 11/8/96” as listed in the Comments field for this site. No Longer Assigned
11/7/2002 Update or Other Action Site is now owned by SMDC. Methd three evaluation completed at site 133, and risk assessment at 85. Proposed Plan pending. Greg Light
12/2/2002 Update or Other Action Please note that this site was turned over from BRAC to SMDC. A fact sheet was developed summarizing the activities at this site. The upper 5 ft of impacted soil in the former fire training pit area was landfarmed by trenching, irrigating, turning, and backfilling the contaminated soil. Soil samples were collected during the process to monitor remediation progress. Additional sampling was conducted in 1998 under BRAC. DDT exceeded migration to groundwater and the ingestion cleanup levels. Cumulative risk standards were exceeded. Emily Youcha
10/1/2004 Update or Other Action In the October 2004 Draft Decision Document Fact Sheets, administrative controls (ACs)were established in order to minimize risk to human health and the environment. The site is included in the post’s Geographic Information System (GIS), a tool used in the Dig Permit process for notifying contractors, workers, and base personnel of the potential for contamination to exist at this site. The Dig Permit process is used to prevent installation of water production well(s) through the contaminated area, and prevent removal of contaminated material from the site to off-base locations or to environmentally sensitive areas. If future land disturbance activities at the site encounter contamination, the contaminated material encountered will be properly remediated or disposed of in accordance with applicable regulations. Emily Youcha
12/14/2004 Update or Other Action A risk assessment was submitted to ADEC in 2002 for sites 85N, 85S, 133, and 112, however it was not approved by ADEC. Soil was placed over the contaminated areas in summer 2002 as a site control measure. Emily Youcha
12/14/2004 Update or Other Action ADEC received a "memorandum for record" factsheet on site 85N, 85S, and 133. SMDC proposes administrative controls are established at the site, 5-yr reviews, a soil cap, and Further investigation may be needed into this site. Emily Youcha
12/20/2004 Update or Other Action ADEC reviewed a report titled "Comprehensive evaluation of groundwater monitoring program Fort Greely, Alaska". The report discussed the existing monitoring network at Fort Greely and the parameters evaluated in ground-water sampling events. ADEC recommended additional investigation into infiltration and vertical hydraulic gradients. ADEC also recommended additional monitoring wells in the Old Post area and more ground-water monitoring at certain specific sites. Emily Youcha
5/24/2005 Site Characterization Workplan Approved A workplan for Summer 2004 and Summer 2005 was approved. The summer 2004 work consisted of soil gas monitoring at site BRAC 85, BRAC 133, and the rest of the Old Post area. This site was suspected to be the source of recent detections of TCE in the groundwater, however, other areas of the Old Post are also suspect. The summer 2005 workplan involves further soil gas surveys, drilling deep boreholes to characterize the vertical extent of contamination, and decommisioning the bioventing system at BRAC 85. Emily Youcha
5/25/2005 Meeting or Teleconference Held Staff conducted a site visit of Fort Greely. Summer fieldwork is underway and includes soil gas surveys, drilling and sampling several deep boreholes, and installation of at least two new monitoring wells. Staff also attended a RAB meeting where the general public recieved an update on site work for this and upcoming seasons. Emily Youcha
9/30/2005 Update or Other Action Staff particpiated in a Restoration Advisory Board Meeting for Fort Greely on September 28. Emily Youcha
11/29/2005 Update or Other Action The Army requested that ADEC review the 2002 Risk Assessment and Soil Evaluation. The ADEC risk assessor reviewed the risk assessment for site 85N (revision 1, dated Dec 6, 2002) and found that the exposure assumptions were not protective and so further work on the risk assessment is required for 85N. Method Three calculations were made for sites 85S, 112, and 133 for an industrial scenario. Some contamination still exceeded the migration to ground water Method Three cleanup levels. At site 133, some contamination exceeded the Method Three migration to ground water cleanup level. ADEC is requesting the Army review the conceptual site model (CSM) for each fire training site to ensure the CSM hasn't changed during the conversion from BRAC to SMDC. ADEC and SMDC will review leachibility modeling and current field results to evaluate the migration to ground water pathway. Emily Youcha
12/7/2005 Site Ranked Using the AHRM Changed the ranking for ground water exposure index from 0 to 1.0 because of recently detected ground-water contamination found at downgradient monitoring wells, thought to be associated with this site. Ranking remains medium priority. Emily Youcha
5/16/2006 Update or Other Action Site added to the database. Mitzi Read
12/5/2006 Meeting or Teleconference Held Ft. Greely interagency meeting held in Anchorage. This site is included in a proposed plan commented upon by DEC in October 2006. The update provided at the meeting was that actions or revisions from SMDC are pending. Colin Craven
12/6/2006 Meeting or Teleconference Held RAB meeting held in Delta Junction. Topics covered are discussed above in the database action for Dec. 5, 2006. Colin Craven
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
8/16/2007 Exposure Tracking Model Ranking Initial ranking completed. Deborah Williams
12/28/2007 Update or Other Action ADEC commented on the 2006 RI. According to the RI, two surface samples (upper 1 foot) were collected and analyzed for geotechnical parameters. They will use the data as part of the Method 3 calculations for the closure of the site. Deborah Williams
8/12/2008 Site Characterization Workplan Approved ADEC approved Fort Greely's Compliance and IRP workplans for the 2008 field season. The following sites will be addressed during the 2008 field season: Compliance: MOGAS/DFA Fuel Line Site (BRAC Sites 92, 94, 96, 97, 98, 99, 100 and 134), Building 612 (BRAC 135) Dry Well, Bldg 628 (BRAC 57) Dry Well, Bldg 157 (BRAC 103) Dry Well, Bldg 675 (BRAC 54) Dry Well, Preconstruction Survey at the Proposed Community Activity Center (CAC) and Active POL Farm Valve Pit Site (Bldg 617). IRP: BRAC Site 85N, 85S, and 133, including Soil Boring 41/MW 10 Area, South Tank Farm, Former Laundry Facility at Bldg 675 (BRAC Site 54). 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 Report or Workplan 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
2/26/2010 Update or Other Action ADEC Staff approved the 2008 Groundwater Monitoring and Data Analysis Report, Fort Greely, Alaska, dated November 2009. This report summarizes the 2008 groundwater monitoring efforts at Fort Greely as part of the long term comprehensive groundwater monitoring. Melody Debenham
7/23/2010 Site Characterization Workplan Approved Approved 2010 IRP Work Plan. Additional soil sampling will be done at this site to characterize the lateral extent of contamination outside of the perimeter landfarm berm and the vertical extent inside the fire training pit/landfarm berm. Melody Debenham
9/4/2013 Report or Workplan 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 Report or Workplan 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
8/28/2015 Report or Workplan 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
9/20/2016 Report or Workplan Review - Other Approved final 2015 groundwater monitoring report. Melody Debenham

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