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Site Report: AKARNG Mountain Village FSA

Site Name: AKARNG Mountain Village FSA
Address: Beans Ave, Mountain Village, AK 99632
File Number: 2430.38.001
Hazard ID: 3064
Status: Active
Staff: Danielle Duncan, 9074655207
Latitude: 62.085691
Longitude: -163.729718
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.


According to the historical record, there had been a few heating oil releases. The first recorded release was of an unknown amount in December of 1979 due to a broken fuel line on the 3,000-gallon AST. There was another reported release from the 3,000-gallon AST in 1984 as a result of a break in the pipeline during refilling. Approximately 900-gallons was released to the ground. In 1995, the ADEC was notified of a release of heating oil during fuel delivery. The releases occurred after the secondary containment was accidentally filled with oil and the bung which was inserted incorrectly allowed oil to drip out. Reportedly less than a gallon was lost and it the majority was caught in a plastic lined box left by the delivery contractor. In 1996, dripping fuel from the 2,000-gallon AST was discovered during a site visit for their Spill Prevention, Control, and Countermeasure (SPCC) plan. Distressed vegetation at the site of the AST was also noted.

Action Information

Action Date Action Description DEC Staff
7/27/1998 Update or Other Action Received Preliminary Assessment Records Review report and Draft Site Sampling Plan, both prepared by Hart Crowser, Inc. Scott Pexton
8/12/1998 Site Characterization Workplan Approved Letter sent with approval of draft site sampling plan. Scott Pexton
9/14/1998 Site Ranked Using the AHRM Received Final Site Sampling Plan, prepared by Hart Crowser, Inc. Scott Pexton
12/28/1998 Update or Other Action Received Draft Site Investigation report, prepared by Hart Crowser, Inc. Scott Pexton
6/16/1999 Update or Other Action Letter sent with comments on draft site investigation report. Scott Pexton
8/20/1999 Update or Other Action Received Final Site Investigation report, prepared by Hart Crowser, Inc. Scott Pexton
11/12/1999 Site Added to Database Petroleum product from heating oil system. Scott Pexton
11/23/1999 Site Ranked Using the AHRM Site ranked based on information in the August 1999 Final Site Investigation report, prepared by Hart Crowser, Inc. Scott Pexton
2/27/2002 Update or Other Action Received "Corrective Action Plan" prepared by Clearwater Environmental, Inc. The plan describes a proposed interim removal action to excavate up to 15 cubic yards of petroleum-contaminated soil to reduce potential exposure to grossly contaminated soil. The plan proposes method one cleanup levels for petroleum hydrocarbons excavated during the interim action, based on Table A1 of 18 AAC 75.341 (Category D cleanup levels proposed are 1,000 mg/kg for GRO, 2,000 mg/kg for DRO, and 2,000 mg/kg for RRO). BTEX concentrations are to be compared to method two, Table B1 Migration to Groundwater cleanup levels. Excavated soil to be transported to a thermal desorption treatment facility located in Lakewood, Washington. Scott Pexton
4/10/2002 Update or Other Action Received Final Interim Removal Action Plan prepared by Clearwater Environment, Inc. Scott Pexton
4/15/2002 Site Characterization Report Approved Sent letter to Norm Straub of the Alaska Army National Guard with approval of the 1999 Final Site Investigation report prepared by ERM West, Inc./Hart Crowser, Inc. with conditions: (1) based on the information provided, ADEC does not approve the proposed alternative cleanup levels of 10,250 mg/kg for DRO, 1,400 mg/kg for gasoline range organics (GRO), 4.6 mg/kg for benzene, 2,770 mg/kg for toluene, 3,847 mg/kg for ethylbenzene, and 54,942 mg/kg for total xylenes; and, (2) soil cleanup levels provided under method one and method two apply at a contaminated site unless the department approves an alternative cleanup level that the responsible person has proposed under method three or method four (18 AAC 75.340 (d)). Letter also provided specific comments on the interim removal action plan provided by Clearwater Environmental, Inc. Scott Pexton
5/3/2002 Update or Other Action Received Email message from Norm Straub of AKARNG with attached Addendum for the Final Interim Removal Action Plan. Scott Pexton
5/15/2002 Interim Removal Action Approved Letter sent to Norm Straub of AKARNG with approval of interim removal action plan (with addendum) prepared by Clearwater The plan describes procedures to conduct an interim removal action in accordance with 18 AAC 75.330. ADEC determined that the proposed interim removal action will reduce human and environmental exposure to hazardous substances at the site and help to prevent the migration of hazardous substances from the site to groundwater and surface water. Up to fifteen cubic yards of petroleum-contaminated soil will be excavated and placed in 55-gallon steel drums or 1-cubic yard Supersacks for temporary storage onsite in an area lined with 10-mill polyethylene plastic. The drums or Supersacks will also be covered with a 6-mill polyethylene plastic cover. The contractor intends to transport the contaminated soil via barge to Seattle, Washington and then via highway to a thermal desorption treatment facility located in Lakewood, Washington. Prior to transporting the contaminated soil from the Mountain Village Federal Scout Armory site, the Alaska Army National Guard contractor will obtain written ADEC approval to move the soil in accordance with 18 AAC 75.370 (b). Scott Pexton
5/15/2002 Record of Decision Approved Soil Cleanup Levels: Benzene = 0.02 mg/kg and DRO = 200 mg/kg using method one, Table A1 and Table B1 at 18 AAC 75.341. Approximately 15 cubic yards of petroleum-contaminated soil will be excavated in accordance with an approved interim removal action plan. Scott Pexton
7/1/2002 Update or Other Action ADEC approved transport and temporal storage of contaminated soil in ALakanuk until Northland can backhaul to Seattle. Beatrice Egbejimba
7/10/2002 Update or Other Action Received faxed documentation from Norm Straub of the Alaska Army National Guard regarding TPS Technologies Inc., a soil treatment facility in the State of Washington, including a cop0y of the operating permit, and a letter indicating acceptance of soils from seven AKARNG facilities. Scott Pexton
4/8/2004 Update or Other Action File number assigned: 2430.38.001. Sarah Cunningham
6/2/2004 Update or Other Action ADEC received draft Alternate Cleanup Level Demonstration Project. Beatrice Egbejimba
6/16/2004 Update or Other Action AKARNG Alakanuk FSA Beatrice Egbejimba
2/4/2005 Update or Other Action SStaff reviewed the July 2004 final workplan that was recieved Oct 04 for the Alternate Cleanup Level Project. The work plan in general meets requirements. Debra Caillouet
2/18/2005 Update or Other Action A letter was sent to the AKANG providing conditional approval of the workplan. Debra Caillouet
6/2/2005 Update or Other Action Staff reviewed the Installation Action Plan and submitted the following comment. The IAP fairly presents the results of a Site Investigation (SI) in 1998. The soil around the old above ground storage tank (AST) contained diesel range organics (DRO) up to 59,000 mg/kg. Soil near the new AST contained up to 10,000 mg/kg DRO. The SI estimated 70-90 cubic yards of soil contaminated above a proposed action level of 10.250 mg/kg were at the site. An Interim Removal Action (IRA) in 2002 removed and treated off-site, 15 cubic yards of DRO contaminated soil near the old AST. Confirmation samples from the excavation sidewalls contained DRO remaining up to 23,600 mg/kg and benzene at 0.171 mg/kg in one sample. The Alaska Department of Environmental Conservation (DEC) has a copy of the draft IRA report but does not have a copy of the final. Please send me a copy of the final IRA report. In the section of the IAP describing the IRA, Hooper Bay is erroneously mentioned, this should be corrected in the final IAP. An Alternative Cleanup Level (ACL) Demonstration is currently pending for the site. The discussion of the cleanup strategy states that a remedial investigation is needed to define the site conditions (geology, permafrost, conceptual site model, etc.), and to delineate the extent of DRO contamination and confirm the extent of groundwater impacts. This information will be needed, along with the total organic carbon information obtained during the ACL demonstration project before DEC will be able to evaluate an ACL for the site. When the alternative cleanup level demonstration results are available, DEC would like to work with the AKARNG to scope the remedial investigation and determine the best course of action for the site. Debra Caillouet
9/1/2005 Interim Removal Action Approved The Interim Removal Action report for the Alaska Army National Guard site in Mountain Village was approved by staff. It documents that 17.6 tons of petroleum contaminated soil were removed and treated at TPS Technologies in Washington. Diesel range organics (DRO) were found up to 23,600 mg/kg remaining in the western sidewall of the excavation near the existing aboveground storage tank. Because residual petroleum contamination in soil, for six of six confirmation samples, exceeds 18 AAC 75.341 Table B1 migration to groundwater cleanup levels, additional site characterization and/or cleanup are necessary. Debra Caillouet
9/26/2005 Update or Other Action Staff drafted a comment letter on the draft ACL Demonstration report. Debra Caillouet
5/10/2006 Site Characterization Report Approved The Final Alternative Cleanup Level Demonstration Report for Mountain Village Federal Scout Armory (FSA) Contaminated Site was approved. Debra Caillouet
5/18/2006 Cleanup Level(s) Approved The cleanup levels proposed are based on a site specific total organic carbon content in the soil of 0.7 percent rather than the default 0.1 percent. This results in the gasoline range organics (GRO) soil cleanup level being capped at the maximum allowable level of 1400 mg/kg. This cleanup level and other petroleum range and constituent cleanup levels, which are based on the migration to groundwater pathway, are shown in the table below. Contaminant of Concern Alternative Soil Cleanup Level Gasoline Range Organics 1400 mg/Kg Diesel Range Organics 1800 mg/Kg Benzene 0.0421 mg/Kg Toluene 19.9 mg/Kg Ethylbenzene 25.8 mg/Kg Xylenes 367 mg/Kg DEC approves these alternative cleanup levels for the site identified in the Mountain Village FSA report reference above. Please note that the use of these cleanup levels will require establishment of institutional controls to document the location of soil with residual contamination above the method two levels and that in accordance with 18 AAC 75.325(i)DEC approval is required prior to transporting such soil off-site. Debra Caillouet
4/1/2008 Exposure Tracking Model Ranking Initial ranking with ETM completed. Debra Caillouet
2/3/2010 Meeting or Teleconference Held Staff participated in the Installation Action Plan meeting. Debra Caillouet
11/30/2010 Report or Workplan Review - Other Staff reviewed and sent comment to the Alaska Army National Guard on the Draft Work Plan for Site Characterization at 21 Alaska Federal Scout Readiness Centers, November 2010, including the Site Specific Plans for Akiak, St. Mary’s and Tuntutuliak. Debra Caillouet
2/25/2011 Report or Workplan Review - Other Comment was sent on the Field Sampling Plans for Napakiak, Tununak, Mountain Village and Kipnuk, February 2011 Debra Caillouet
5/23/2011 Site Characterization Workplan Approved Final Work Plan for Site Characterization at 21 Alaska Federal Scout Readiness Centers, April 2011 approved. Debra Caillouet
8/8/2013 Site Characterization Report Approved Mountain Village Federal Scout Readiness Center Data Gap Investigation Report, Final June 2013 The report recommends cleanup levels of 1,400 mg/kg for GRO, 11,212 mg/kg for DRO, and 0.171 mg/kg for benzene based on the default aromatic and aliphatic cleanup levels from 18 AAC 75.34 Table B2 for the ingestion and inhalation pathways. The GRO is capped at the maximum allowable. ADEC has no objection to the use of these cleanup levels. Confirmation sampling will be necessary to show all levels, (total DRO by AK102, DRO Aromatic, DRO Aliphatic, total GRO by AK101, GRO Aromatic, GRO Aliphatic and benzene) are met. Debra Caillouet
10/22/2013 Cleanup Level(s) Approved ROD approved Debra Caillouet
2/24/2015 Report or Workplan Review - Other Draft Mountain Village Remedial Action Plan, Federal Scout Readiness Center, February 12, 2015 Debra Caillouet
7/24/2015 Cleanup Plan Approved Final Mountain Village Remedial Action Plan, Federal Scout Readiness Center, July 14, 2015 Debra Caillouet
12/23/2015 Update or Other Action Remediation will occur this summer. Work plan has already been approved. There is no groundwater contamination. Danielle Duncan
2/7/2017 Report or Workplan Review - Other Provided comments on the draft remedial action report this date. Danielle Duncan

Contaminant Information

Name Level Description Media Comments

Control Type

Type Details


Description Details

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