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Site Report: FAA Lake Minchumina

Site Name: FAA Lake Minchumina
Address: FAA Lake Minchumina, Lake Minchumina, AK 99757
File Number: 225.38.001
Hazard ID: 1924
Status: Active
Staff: Livia Bracker, 9072697695 livia.bracker@alaska.gov
Latitude: 63.882205
Longitude: -152.314477
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

Gasoline and heating oil contaminated soil discovered and stockpiled after excavation of two 500-gallon gasoline, one 2,500-gallon gas and one 1,000-gallon diesel heating oil USTs in June and July 1993.

Action Information

Action Date Action Description DEC Staff
1/13/1992 Notice of Violation Notice of Violation - 1992310900801 Minchumina FSS - AK7 690 590 032 - based on findings from an inspection of the facility conducted on August 26, 1991. Eileen Olson
9/30/1992 Update or Other Action Administrative Order On Consent U.S. EPA Docket Number 1092-06-09-3008(h). Eileen Olson
12/14/1992 Update or Other Action EPA's Termination of Consent Order and Federal Facility Compliance Agreement Docket Number 1088-05-12-3008. Eileen Olson
10/20/1993 Update or Other Action Underground Storage Tank Decommissioning Assessments Fuel Storage Tank Decommissioning and Installation submitted. Documents removal of 57-D-1, 57-A-8, 57-B-9, and 57-B-8. Eileen Olson
5/18/1994 Update or Other Action Interim Corrective Action Report Fuel Storage Tank Decommissioning FAA NDB Site submitted. Eileen Olson
10/14/1994 Cleanup Plan Approved (Old R:Base Action Code = CAPR - Corrective Action Plan Review (LUST)). Reviewed Interim Corrective Action Plan. Biocell remediation approved. High level of in situ diesel contamination needs to be addressed using appropriate testing methods. Requested data follow-up. Jackie Dupee
10/14/1994 Update or Other Action (Old R:Base Action Code = SA1 - Phase I Site Assessment (General)). Reviewed Site Assessment Report. Approximately 2200 cubic yards of gasoline and diesel contaminated soils. Extensive in situ contamination. Biocell remediation proposed. Additional data requested. Jackie Dupee
10/14/1994 Update or Other Action ADEC correspondence to FAA with comments and suggestions regarding Interim Corrective Action Report, Fuel Storage Tank Decommissioning FAA Non-Directional Beacon Site, Lake Minchumina, Alaska. Former Staff
10/21/1994 Site Added to Database Gasoline and heating oil contamination. Former Staff
2/27/1995 Update or Other Action Corrective Action Report Fuel Storage Tank Decommissioning FAA Flight Service Station submitted. Eileen Olson
5/17/1996 Update or Other Action ADEC Correspondence to FAA regarding the actions ADEC requires of FAA prior to close out of the biocell. Dick Farnell
6/21/1996 Update or Other Action NFA for the four removed USTs. Continued remediation of the contaminated soil for these tanks at the FAA site will be addressed under the CSRP. Chet Halcomb
3/4/1997 Update or Other Action Biocell Closure Decommissioning Report Fuel Storage Tank Decommissioning FAA, FSS submitted. Eileen Olson
1/27/1998 Update or Other Action ADEC Correspondence to FAA commenting on FAA Draft Landspreading Manual, June 1997, signed by Jim Hayden and Lynn Kent. Jim Hayden
9/17/1998 Site Characterization Workplan Approved Approval of "Work Plan for Sampling FAA Lake Minchumina Remedial Action Project, June 17, 1998". Dick Farnell
5/12/1999 Update or Other Action ADEC Correspondence to FAA commenting on FAA letter of April 29, 1999, prepared by Geosphere, with subject line "DEC Letter of March 25, 1999 and Review of the Landspreading Manual". Eileen Olson
7/17/1999 Update or Other Action Final Minchumina Remedial Action Report submitted. Eileen Olson
12/19/1999 Meeting or Teleconference Held Eileen Olson and Tim Stevens met with Jim Swalling and Brian Karey of FAA to discuss the history of the Lake Minchumina UST/AST closures and any follow-up corrective action. Eileen Olson
1/25/2000 Site Ranked Using the AHRM Initial ranking. Eileen Olson
6/1/2000 Update or Other Action Environmental Assessment and Finding of No Significant Impact for FAA Environmental Restoration, Lake Minchumina Station, Alaska. Eileen Olson
6/5/2000 Proposed Plan Approval, with conditions, of the April 13, 2000, Lake Minchumina Flight Service Station Draft Pre-Field Planning Document Work Plan. Eileen Olson
7/5/2000 Update or Other Action Correspondence regarding Department requirements for landspreading petroleum contaminated soils. Tim Stevens
7/8/2000 Update or Other Action Final Pre-Field Planning Document Release Investigation and Health and Safety Plan submitted. Eileen Olson
8/2/2000 Update or Other Action Correspondence regarding FAA's request for NFAs Lake Minchumina tank site and the corrective action needed prior to NFAs being granted. Tim Stevens
2/8/2001 Update or Other Action Draft Release Investigation Report for FAA FSS submitted. Eileen Olson
2/9/2001 Meeting or Teleconference Held Eileen Olson and Elizabeth Stergiou met with Lillian Demoski and Jim Swalling from FAA, David Jadhon from NISC and Brian Miskill and Lynn DeGeorge from Montgomery Watson to discuss the Upper Housing Area and the Building 600 area. Eileen Olson
6/11/2001 Update or Other Action Site visit by Elizabeth Stergiou, lead by Brad Platt of FAA. Examined all the separate sites at Lake Minchumina including the former drum area, housing area, landspreading area, former FSS, MRL, and former building 402. Elizabeth Stergiou
8/6/2001 Meeting or Teleconference Held Eileen Olson met with FAA's Jim Swalling regarding the sampling plan for the landspreading area. Eileen Olson
8/21/2001 Cleanup Plan Approved The plan proposes excavating petroleum-contaminated soil from tank sites at Buildings 100, 101, 102, 301, 402 and the Flight Service Station, and sampling at the limits of excavation. The drinking water well at Building 300 will be decommissioned and three new monitoring wells will be installed downgradient of the known petroleum plume at Building 600. All monitoring wells at Building 600 will be sampled. Contaminated soils will be field screened and sampled during excavation and placed in a long-term stockpile. The existing landspread area, containing approximately 2200 cubic yards of petroleum contaminated soil, will be sampled. ADEC commented on the deletion of the fuel dispenser associated pipeline (~75') removal and reminded FAA the associated soils will need to be characterized in the near future. ADEC also commented on formatting and report quality issues. Eileen Olson
10/2/2001 Meeting or Teleconference Held Staff conducted a site visit with FAA's Brad Platt. The former FSS has been excavated in steps down to 17’ below ground surface. From about 8’ below ground surface down to at least the bottom of the excavation on the north sidewall is layered rock that is holding product between its layers. They have already excavated laterally as close to a road, along a bluff, as they can with out threatening the integrity of the road. Staff recommended FAA propose an alternative clean up levels. The former MRL site has been excavated and is thought to be clean since it has a higher clean up level. BNCI is awaiting confirmation sample results prior to backfilling. In the living quarters area, soil below the sites of buildings 301, 100 and 102 are still contaminated. BNCI thought they could excavated to clean soil, FAA directed them to do so. Elizabeth Stergiou
10/9/2001 Meeting or Teleconference Held Staff met with FAA staff for a teleconference with contractor personnel in the field. Agreed on excavation and sampling rationale for Building 301 so as to complete as much site work as possible before the end of the field season. Eileen Olson
6/4/2002 Update or Other Action Sent letter requesting laboratory analytical results with cooresponding diagrams of the location and depth of samples for work completed during field season 2001 by June 11, 2002. Also requested draft report documenting work completed during field season 2001 by July 1, 2002. Elizabeth Stergiou
6/18/2002 Update or Other Action Recieved Draft Remedial Action Report. Sent letter requesting final report to be submitted by July 15, 2002. Elizabeth Stergiou
9/18/2002 Update or Other Action Sent letter requesting groundwater monitoring for all existing wells on site, with a schedule of monitoring to be submitted by March 31, 2003 and the monitoring to be complete by June 30, 2003. Also requested the long term contaminated soil stockpile constructed during field season 2001 should be cleaned up by the end of field season 2003. Elizabeth Stergiou
9/19/2002 Update or Other Action Sent general letter requesting the following documents be submitted by 10/1/02: the final corrective action report for work completed in 2001 and the final release investigation report for the 2000 release investigation. Elizabeth Stergiou
9/4/2003 Update or Other Action ADEC approved the workplan for the Fall 2003 Sampling and Analysis Plan for various sites. Deborah Williams
9/27/2004 Update or Other Action On this date DEC staff, at the request of FAA environmental personnel, reviewed and determined that No Further Remedial Action is Planned (NFRAP) or necessary at the Lake Minchumina Areas of Concern (AOCs) Building 400 (Flight Service Station) and Building 402 (MRL Building). Stockpiled soil associated with the two AOCs will need to achieve the most stringent cleanup levels in order to receive full closure. Hazard ID 1924 will remain active until all AOCs associated with the site have achieved cleanup levels and can be issued similar NFRAPs, at which case the site can be evaluated for complete closure. Mike Jaynes
1/8/2009 Exposure Tracking Model Ranking Initial ranking with ETM completed for source area id: 72902 name: auto-generated pm edit FAA Lake Minchumina Daniel Fremgen
11/17/2011 Update or Other Action File review ordered at request of Dept of Natural Resources Fred Vreeman
11/29/2011 Meeting or Teleconference Held Report to DNR with site summary and recommendation to proceed with selection. Fred Vreeman
3/27/2012 Meeting or Teleconference Held Meeting with FAA to discuss and approve future plans for Minchumina property. The FAA plans to continue to own 10 of our 750 acres, and transfer the other 740. ADOTPF wants some and FAA is not sure who selected the rest. The 10 acres include the landfarm. stockpiles, former building locations etc, basically the main area the FAA occupied at Minchumina. Work at site will continue. Schedule will be submitted annually. Fred Vreeman
9/15/2014 Update or Other Action Verified site is on list for work in FY16. Fred Vreeman
8/7/2015 Update or Other Action Funding in FY15 was used for high priority remediation projects. Request sent this day to FAA asking for status update on Minchumina. Fred Vreeman
4/26/2016 Update or Other Action Site reassigned for follow up by project manager Fred Vreeman
8/21/2017 Site Characterization Workplan Approved Final Work Plan for Lake Minchumina FAA Station Release Investigation was approved. This project includes sampling of the three existing monitoring wells, installation and sampling of up to two additional monitoring wells, Multi Increment (MI) sampling of the landspread and two stockpiles, and Ultra-Violet Optical Screening Tool (UVOST) probing to delineate petroleum contaminated soil (PCS) at eight Areas of Concern (AOCs). John O'Brien
1/22/2020 Exposure Tracking Model Ranking Initial ranking with ETM completed for source area id: 80538 name: Lake Minchumina Buildings 103, 104, 105, Outhouse Tim Sharp
2/20/2020 Update or Other Action DEC commented on 2019 Draft Report for Lake Minchumina FAA Station Demolition and Remedial Action. The report detailed demolition of four buildings with lead based paint, ACM, and PCBs. Contaminated soil was added to soil stockpiles. The landfarm was tilled weekly during the field season. Tim Sharp
4/2/2020 Update or Other Action DEC Approved 2019 Final Demolition and Remediation report. Four buildings were demo'd and weekly tilling efforts were detailed to remediate POL contaminated soils. All waste streams were accounted for and transport forms were included. Tim Sharp
5/13/2021 Exposure Tracking Model Ranking Initial ranking with ETM completed for source area id: 78669 name: Lake Minchumina Upper Housing Area Tim Sharp
6/7/2021 Site Visit DEC visited the site and observed the stockpiles being consolidated into the landfarm area, the remediated soil backfill material stockpile, and all other AOCs at the site. Building 300/600 contamination was summarized and will be added as a new source area. The Former Drum Storage Area was examined and no drums or contaminated soil was apparent, and will be assessed for closure determination. Other previously closed sites were observed, and photos were taken and uploaded to the site file. Tim Sharp
6/17/2021 Exposure Tracking Model Ranking Initial ranking with ETM completed for source area id: 80975 name: Buildings 300, Former Gas Dispenser and Building 600 Tim Sharp
6/24/2021 Exposure Tracking Model Ranking A new updated ranking with ETM has been completed for source area 72902 FAA Lake Minchumina Lower Housing Area. Tim Sharp
6/24/2021 Exposure Tracking Model Ranking Initial ranking with ETM completed for source area id: 80976 name: Pipeline Area #1 Tim Sharp
6/25/2021 Exposure Tracking Model Ranking Initial ranking with ETM completed for source area id: 80977 name: Building 106 UST Tim Sharp
12/10/2021 Document, Report, or Work plan Review - other DEC sent comments on the Draft 2021 Remedial Action Report. This report details landfarm maintenance and operations throughout the summer, as well as soil sampling for VOCs, DRO, GRO, and PAHs. Results from the top foot of the landfarm after weekly tilling indicated soils were successfully remediated. FAA also sampled soil at Bldg. 103 for chlorinated solvents and did not detect any. FAA will remove clean soil from the landfarm and add excavated soil from Building 103 and near Building 300 for remediation next season, per recommendations. Tim Sharp
1/26/2022 Document, Report, or Work plan Review - other DEC approved the Final 2021 Report. FAA is planning to excavate a hot spot at the Former Bldg 103, and contaminated soil at Bldg 300. All of this is anticipated to be landfarmed. Tim Sharp
4/25/2022 Document, Report, or Work plan Review - other DEC reviewed and submitted comments on the Draft 2022 Work Plan for Minchumina Soil Removal and Treatment. The work plan proposes excavating approximately 1300 cubic yards of petroleum contaminated soil to be landfarmed on site. The existing landfarm will have clean soil removed and added to a stockpile. DEC requested clarification on excavation extents and depths. Tim Sharp
5/6/2022 Document, Report, or Work plan Review - other DEC Approved the Final 2022 Soil Removal and Treatment Work Plan. Excavations will reach to 15 feet deep. Tim Sharp
5/16/2022 Offsite Soil or Groundwater Disposal Approved DEC approved the Contaminated Media Transport and Treatment or Disposal Approval form for 833 CYs of landfarmed soil to be used as backfill for various 2022 excavation sites. The soils have remediated to below cleanup levels. Tim Sharp
8/18/2022 Site Characterization Workplan Approved DEC approved the Work Plan Addendum/Scope of Work Revision for Dioxin Sampling. Soils will be sampled from the landfarm, stockpiles, and previous backfill locations for dioxins of all congeners and compared to TEQs to determined if dioxins have been rereleased at the site. Tim Sharp
12/20/2022 Exposure Tracking Model Ranking Initial ranking with ETM completed for source area id: 81275 name: North Airstrip Empty Drum Storage Area Tim Sharp
12/20/2022 Exposure Tracking Model Ranking Initial ranking with ETM completed for source area id: 81276 name: Landfill Tim Sharp
12/20/2022 Exposure Tracking Model Ranking Initial ranking with ETM completed for source area id: 81277 name: New South Dump Tim Sharp
1/5/2023 Document, Report, or Work plan Review - other DEC received and reviewed the Draft 2022 Report for FAA Minchumina Soil Removal and Treatment. The report details excavation of petroleum-contaminated soil, landfarming operation and maintenance activities, and sampling of previously remediated soils for dioxins. The top foot of the landfarm was remediated in 2022 and is below applicable cleanup levels. Dioxins were detected in all samples collected but were all below cleanup levels. There is extensive petroleum contamination remaining in soils at several areas of concern, including the Former Building 600, “Hot Spots” 1-5, and at the petroleum, oils, and lubricants (POL) 1,2,4 excavation limits. Tim Sharp
1/24/2023 Document, Report, or Work plan Review - other DEC approved the Final Lake Minchumina 2022 Soil Removal and Treatment Report. Tim Sharp
2/23/2024 Document, Report, or Work plan Review - other DEC provided comments for the FAA Lake Minchumina Draft 2024 Site Investigation/Remedial Investigation/Landfarm Operations Work Plan. The work plan involves addressing nine areas of concern at the site, including by landfarming treated soil, investigating lead and polychlorinated biphenyl (PCB) paint impacts, investigating several areas of petroleum, oils, and lubricants (POL) impacts, and installing and sampling groundwater wells, among other activities. Tim Sharp
7/11/2024 Exposure Tracking Model Ranking Initial ranking with ETM completed for source area id: 81418 name: AOCs: 100, 102, 402 Livia Bracker
9/5/2024 Site Visit A site visit was conducted on 9/4/2024. DEC staff observed and took photos of the groundwater monitoring wells, former building excavation areas, former drum sites, and two previous landfill sites. Sampling of the landspread by Ahtna staff was also observed. Livia Bracker
9/24/2024 Update or Other Action DEC reviewed the files associated with the petroleum contamination at Buildings 100, 102, and 402 and determined that no remedial action is required at these AOCs. Decision document was sent 9/24/24. Livia Bracker

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
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