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:	Tim Sharp, 9074512131 tim.sharp@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.

Site Chronology
IC / Closure Details
Documents
Associated Sites

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

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

Contaminant Information

Name

Level Description

Media

Comments

Control Type

Type

Details

Requirements

Description

Details

2004.09.27 No Further Remedial Action Planned for B400 and B402 Letter

No associated sites were found.

Missing Location Data

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Alaska Department of Environmental Conservation

Site Report: FAA Lake Minchumina

Site Chronology

IC / Closure Details

Documents

Associated Sites

Problems/Comments

Action Information

Contaminant Information

Control Type

Requirements

2004.09.27 No Further Remedial Action Planned for B400 and B402 Letter

Missing Location Data

State of Alaska Department of Environmental Conservation