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Site Report: Drift River Facility Avgas Tank F-3

Site Name: Drift River Facility Avgas Tank F-3
Address: Mouth of Drift River, 1 Mile from Drift River, Kenai, AK 99611
File Number: 2320.38.016
Hazard ID: 981
Status: Cleanup Complete
Staff: No Longer Assigned, 9074655229 dec.icunit@alaska.gov
Latitude: 60.589042
Longitude: -152.162298
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

Approximately 640 gallons of aviation fuel leaked from an above ground storage tank (F-3) near the runway at Drift River. Soil and groundwater have been contaminated. The spill was discovered on 3/21/1990. Floating product has been detected on the water table.

Action Information

Action Date Action Description DEC Staff
3/18/1992 Cleanup Plan Approved (Old R:Base Action Code = RAPR - Remedial Action Plan Review (CS)). ADEC issued a conditional approval letter to remediate the contaminated soil using air sparging. Donald Seagren
6/2/1992 Site Added to Database Aviation fuel contamination. Former Staff
12/9/1992 Site Ranked Using the AHRM Initial ranking. Former Staff
10/8/1993 Update or Other Action (Old R:Base Action Code = RAPR - Remedial Action Plan Review (CS)). Reviewed request to use monitor well purge water in remediation process. Approval letter sent 10/8/93. Donald Seagren
1/11/1994 Update or Other Action (Old R:Base Action Code = RAU - Remedial Actions Underway (General)). Donald Seagren
9/1/1994 Update or Other Action (Old R:Base Action Code = RARR - Remedial Action Report Review (CS)). Reviewed report on status of remedial actions. Donald Seagren
10/14/1994 Update or Other Action (Old R:Base Action Code = RARR - Remedial Action Report Review (CS)). Review 1993 year end remedial action progress report. Donald Seagren
11/10/1994 Update or Other Action (Old R:Base Action Code = RARR - Remedial Action Report Review (CS)). Review quarterly monitoring and progress report. Donald Seagren
3/30/1995 Update or Other Action Site status changed from closed to active, tier from 9 to 2. Deleted status comments "Reviewed closure and disposal reports. Issued No Further Action letter, 3/17/94." Donald Seagren
4/3/1995 Update or Other Action (Old R:Base Action Code = RARR - Remedial Action Report Review (CS)). Reviewed 1994 year-end remediation progress report. Donald Seagren
5/23/1995 Update or Other Action (Old R:Base Action Code = RECN - Site Reconnaissance (CS)). Conducted a site inspection with UNOCAL environmental person of the spill site. Discussed cleanup and remediation plans. Donald Seagren
7/26/1995 Update or Other Action (Old R:Base Action Code = RAPR - Remedial Action Plan Review (CS)). Received additional information requested 5/3/95 on thermal remediation work plan. Plan approved 7/26/95. Donald Seagren
8/21/1995 Update or Other Action (Old R:Base Action Code = RARR - Remedial Action Report Review (CS)). Reviewed progress report of on-going remediation activities. Donald Seagren
10/13/1995 Update or Other Action (Old R:Base Action Code = RARR - Remedial Action Report Review (CS)). Reviewed status report on remediation actions. Donald Seagren
1/4/1996 Update or Other Action (Old R:Base Action Code = RARR - Remedial Action Report Review (CS)). Reviewed thermal remediation report and data. Issued soil disposal letter. Donald Seagren
1/5/1996 Update or Other Action (Old R:Base Action Code = RARR - Remedial Action Report Review (CS)). Reviewed quarterly GW monitoring/sampling reports. Donald Seagren
1/10/1996 Long Term Monitoring Established Long Term Monitoring was established in 1996. Alyce Hughey
1/20/1998 Update or Other Action Reviewed a facility risk assessment and comments. Finalized review comments and send to Unocal for response. Donald Seagren
7/6/1999 Update or Other Action At the request of CIPL, the GW monitoring data was reviewed. The frequency of GW monitoring was changed from semi-annual to annual. Donald Seagren
10/13/1999 Update or Other Action Reviewed semi-annual GW Monitoring Report. Donald Seagren
6/13/2000 Update or Other Action Site inspection with Jim Shew and John Hammelman. Discussed possibility of site close out under Method 2 standards rather than using risk based cleanup levels. Results of current soil and GW sampling will determine closeout method. Donald Seagren
11/29/2000 Update or Other Action Discussed site closure using Method 2 levels instead of ACLs with John Hammelman. Waiting for data, reports and request. Donald Seagren
1/10/2001 Update or Other Action Reviewed RCRA quarterly progress report. Donald Seagren
7/17/2001 Update or Other Action Reviewed RCRA quarterly progress report. Donald Seagren
10/4/2001 Update or Other Action Reviewed public notice support documentation and quarterly progress report for third quarter 2001. Donald Seagren
10/23/2002 Meeting or Teleconference Held Meeting with Unocal and OilRisk Consultants to discuss LTM and draft 10X ROD and implications. Donald Seagren
11/13/2002 Record of Decision ROD signed denying use of ACLs under 10X Rule in 18AAC 75.350. Donald Seagren
4/16/2003 Update or Other Action Reviewed November 02 GW monitoring report. All contaminant levels below Table C. Requested another sampling event in Fall, '03. Will consider modifying GW monitoring program if contaminant levels remain below Table C. Requested additional site assessment &/or remediation plan for soil exceeding cleanup levels for DRO & GRO. All MWs to remain in place until soil contamination resolved. Donald Seagren
2/19/2004 Update or Other Action Reviewed October 03 monitoring report. Approved reduction to every other year. Work plan required for addressing remaining soil contamination. Donald Seagren
2/23/2004 Update or Other Action File number assigned and entered into the Fileroom DB and CS DB. Alyce Hughey
8/19/2005 GIS Position Updated Using Figure 1-1 from a Confirmation Sampling Report, Tank Farm and AVGAS Spill Sites, Drift River Terminal, from OilRisk Consultants, dated May 2001, in conjunction with TopoZone Pro, entered the coordinates for this site. Metadata includes USGS Topo Map 1:63K, TopoZone Pro Street Map, on a Medium Size Map, View Scale 1:24,000, Coordinate Datum NAD83. Moderate to High degree of confidence in accuracy of location. Alyce Hughey
12/27/2005 Update or Other Action Reviewed 2005 Biennial Groundwater Monitoring report. Well aF-2 not sampled due to a parted casing. All MWs below ADEC clenaup standards. Monitoring will continue until the contaminated soil exceeding ADEC cleanup levels has been remediated and/or shown to be below ADEC cleanup standards. Contaminated soil exists below the tanks, which is currently inaccessible. Donald Seagren
4/5/2007 Exposure Tracking Model Ranking Donald Seagren
6/12/2008 Update or Other Action Site transferred from Don Seagren to Paul Horwath per Linda Nuechterlein. Alyce Hughey
1/11/2012 Document, Report, or Work plan Review - other Reviewed the 2011 Groundwater Monitoring Report, Drift River Facility Avgas site, dated December 28, 2011, from Oil Risk Consultants. In March of 2009 Mt. Redoubt erupted and the site was inundated by a volcanic mudflow. Lahar deposits filled the fuel tank containment but no fuel was released. The summer of 2009 field activities included removing up to five feet thick of Lahar deposits from the airstrip and surrounding area. During the eruption and the cleanup activities that followed, several monitoring wells were destroyed, leaving only two remaining at the site (AF-1 and AF-4). On July 27, 2011 the two remaining groundwater monitoring wells were sampled, with Benzene returning to the source area monitoring well AF-1 at a concentration of 0.0237 mg/L. The groundwater and surrounding floodplain elevations increased after the eruption, and it is thought that the increase in concentrations within monitoring well AF-1 could be due to the groundwater elevation increasing. Alyce Hughey
3/21/2012 Update or Other Action Decision to await 2013 GW sampling event, prior to requiring any additional work. Paul Horwath
5/22/2014 Update or Other Action ADEC needs to request a GW sampling event. Could consider cleanup complete with GW monitoring requirement. Paul Horwath
12/16/2019 Document, Report, or Work plan Review - other Prepared and sent comment letter for the 2017 Drift River Terminal Avgas Tank F-3 Spill Groundwater Sampling report, dated April 2018. Jessica Hall
12/17/2019 Update or Other Action NO GW Sampling was performed between 2012-2016 due to an oversight by Hilcorp after purchasing the property per Greg Rutkowski of Hilcorp. Jessica Hall
1/2/2020 Document, Report, or Work plan Review - other Reviewed and sent Approval letter for Response to ADEC Comments on the 2017 Drift River Facility AvGas Tank F GW Monitoring Report receieved December 31, 2019. Jessica Hall
1/24/2020 Update or Other Action ADEC received Final 2017 DRIFT RIVER TERMINAL AVGAS TANK F-3 SPILL GROUNDWATER SAMPLING, dated January 2020. Jessica Hall
1/31/2020 Site Characterization Report Approved The 2017 Groundwater Monitoring Report Approval Letter was sent to the RP. Hilcorp requested that ADEC grant a determination of cleanup complete for the DRT AVGAS Tank F-3 spill site. ADEC requested additional information to make this determination. Please see report named "2020.01.31 ADECApproval2017DriftRiverFacilityAvGasTankFGWMonitoringRpt" in the site file for requested information. Jessica Hall
1/31/2020 Site Characterization Report Approved The 2017 Groundwater Monitoring Report Approval Letter was sent to the RP. Hilcorp requested that ADEC grant a determination of cleanup complete for the DRT AVGAS Tank F-3 spill site. ADEC requested additional information to make this determination. Please see report named "2020.01.31 ADECApproval2017DriftRiverFacilityAvGasTankFGWMonitoringRpt" in the site file for requested information. Jessica Hall
1/31/2020 Update or Other Action ADEC Received the 2009 GWM Report from Greg Rutkowski (Jacobs/Hilcorp). Jessica Hall
10/8/2020 Exposure Tracking Model Ranking A new updated ranking with ETM has been completed for source area 71960 AST release. Jessica Hall
10/29/2020 Cleanup Complete Determination Issued Jessica Hall

Contaminant Information

Name Level Description Media Comments
DRO Between Method 2 Migration to Groundwater and Human Health/Ingestion/Inhalation Soil Contamination remains in the surface soil but is below human health ADEC cleanup levels.
GRO Between Method 2 Migration to Groundwater and Human Health/Ingestion/Inhalation Soil Contamination remains in the surface soil but is below human health ADEC cleanup levels.
BTEX Between Method 2 Migration to Groundwater and Human Health/Ingestion/Inhalation Soil Contamination remains in the surface soil but is below human health ADEC cleanup levels.

Control Type

Type Details
No ICs Required

Requirements

Description Details
Advance approval required to transport soil or groundwater off-site.
Movement or use of contaminated material (including on site) in a manner that results in a violation of the water quality standards is prohibited (18 AAC 70)

No associated sites were found.

Missing Location Data

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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
TDD: 800-770-8973
Physical Location: 410 Willoughby