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Site Report: Bethel Power Products

Site Name: Bethel Power Products
Address: 295 Tundra Way, Intersection of Third and Tundra Way, Bethel, AK 99559
File Number: 2407.26.003
Hazard ID: 23356
Status: Active
Staff: Kris Dent, 9072623411 kris.dent@alaska.gov
Latitude: 60.794055
Longitude: -161.752543
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

Tank pull in 1994 for tank 1,2. Site Assessment not complete until 2003. Contamination Reported on Post Closure Notice. On September 18, 2003, two 2,000-gallon gasoline underground storage tanks (USTs) and associated dispensers and piping were removed. At the time of the USTs' removal, a proper closure assessment was not conducted. On November 4, 2003, a closure assessment was conducted where approximately 100 cubic yards of soil was removed and characterized. Gasoline range organics (GRO) and benzene, toluene, ethylbenzene, and xylenes (BTEX) soil contamination was found above the applicable ADEC soil cleanup levels. The excavated soils were then backfilled into the excavated area. On October 20, 2004, five soil borings were advanced and made into monitoring wells in an effort to determine the horizontal extent of soil and/or groundwater contamination. Benzene soil contamination was found in the soil borings and GRO, Benzene, and Toluene groundwater contamination was found in the monitoring wells. In June of 2006, an interim removal action was performed. Approximately 300 cubic yards of potentially impacted soil was excavated and formulated with bacteria enzymes and nutrients were added to the soil to facilitate bioremediation of the petroleum hydrocarbons. The treated soils were then replaced into the excavated area. In May and June of 2008, a Site Characterization and Confirmation Sampling was done to characterize in-place soil, to replace destroyed monitoring wells, and to evaluate the effectiveness of the interim remedial action. Benzene soil contamination remains in the southwest corner of the excavation area, and west and southwest of the former USTs. GRO and BTEX groundwater concentrations exceed the ADEC groundwater cleanup levels in the monitoring well located downgradient of the former USTs, with the potential of off-site migration of contaminated groundwater.

Action Information

Action Date Action Description DEC Staff
11/4/2003 Leaking Underground Storage Tank Release Confirmed - Petroleum LUST Site created in CSP for source area ID 77713 (Added by System) David Allen
11/4/2003 Leaking Underground Storage Tank Cleanup Initiated - Petroleum Former Staff
11/4/2003 Site Added to Database Former Staff
12/31/2003 Update or Other Action RECKEY has automatically been generated. Former Staff
4/8/2004 Underground Storage Tank Site Characterization or Assessment Reviewed UST Closure Assessment report Donald Seagren
4/8/2004 Update or Other Action Notice of Release/Cost Recovery Notification/Corrective Action Plan required letter issued. Donald Seagren
5/6/2004 Update or Other Action Discussed site with Chris Tracy, current ANICA site manager. S&W has been hired to develop work plan and conduct additional site assessment/cleanup. Donald Seagren
8/30/2004 Update or Other Action Reviewed file and sent letter inquiring about the status of the assessment/cleanup work plan. Donald Seagren
9/8/2004 Update or Other Action Telephone call from Chris Tracy, ANICA. S&W will be issued approval to proceed today. Work plan to be submitted shortly. Work to be done Fall 04. Donald Seagren
9/22/2004 Update or Other Action Telephone call with Dan McMahan, S&W. Work plan to be submitted shortly, with work to be conducted this fall, prior to freezeup. Donald Seagren
10/4/2004 Document, Report, or Work plan Review - other File and work plan review. Approved work plan for additional site assessment. Required LTM plan and remediation plan to be developed for implementation in Spring 05. Donald Seagren
12/1/2004 Update or Other Action File number 2407.26.003 assigned and entered into the Fileroom database and Leaking Underground Storage Tank database. Alyce Hughey
3/1/2005 Leaking Underground Storage Tank Corrective Action Underway Letter sent requiring corrective action following 18 AAC 78.240 - 18 AAC 78. 276. Required corrective action work plan to be submitted no later than 15 May 05 for implementation during Summer of 2005. Donald Seagren
3/1/2005 Release Investigation Release investigation report, dated December 2004 confirmed soil and groundwater contamination exceeding ADEC cleanup standards. Donald Seagren
1/17/2006 Update or Other Action Reviewed file. Have received no response to 1 March 05 letter requiring corrective action. Sent 2nd letter requiring submission of CA report within 30 days or CA work plan within 60 days, with work to be conducted ASAP to ensure protection of human health and the environment. Contamination could be migrating off site. Donald Seagren
2/17/2006 Update or Other Action Received a call from Tom @ ANICA. He was previously store manager in Bethel and will now be project manager for cleanup. They sold property and worked on removing buildings and structures. They plan to move ahead with site cleanup this summer using S&W as their consultant. He will send a letter with new contact information, site status and cleanup plans & schedule. Donald Seagren
3/21/2006 Update or Other Action After receivning no response or site cleanup work plan from ANICA, S&W was contacted with questions about their plans for 2006 to cleanup the site. Donald Seagren
5/5/2006 Leaking Underground Storage Tank Corrective Action Underway Reviewed and Approved Interim Removal Action Work Plan. Soil & GW sampling will be required for site closure to ensure the success of the treatment technology. Donald Seagren
9/21/2006 Update or Other Action Reviewed Interim Removal Action report. Soil & Gw contamination remains above cleanup levels. Approximately 300 yds3 of contaminated soil was excavated, treated with a mixture of nutrients, bacteria & enzymes and replaced in the excavation. Impacted soil extends beyond excavation. Impacted water potentially extends off-site. Assessment in 2007 will assess effectiveness of remediation efforts. Donald Seagren
3/8/2007 Exposure Tracking Model Ranking Former Staff
12/3/2007 Update or Other Action Telephone call with Nick Protos (S&W). Need followup assessment/sampling of stockpile and in-situ soil & GW to know current status in order to develop a corrective acton plan to move to close out. Donald Seagren
2/12/2008 Underground Storage Tank Site Characterization or Assessment Reviewed draft assessment plan. Discussed changes with Nick Protos, S&W. He will finalize plan and present to client for approval. Donald Seagren
5/5/2008 Underground Storage Tank Site Characterization or Assessment Reviewd & approved site assessment work plan to update site remediation information. Donald Seagren
6/13/2008 Update or Other Action Site transferred from Don Seagren to Paul Horwath per Linda Nuechterlein. Alyce Hughey
7/14/2009 Site Characterization Report Approved Reviewed the September 2008 Site Characterization and Confirmation Sampling report, from Shannon & Wilson, Inc. Based on the review of the report and prior reports, the completion and submittal of a Conceptual Site Model (CSM) should be completed at this time, and shall include a discussion of surrounding land use and the location of any nearby structures, the types of building construction used in Bethel that could affect the relative risk to vapor intrusion, and the source(s) of drinking water in the immediate area. Also requested was a corrective action plan to establish the extent of the groundwater contaminant plume. Paul Horwath
8/28/2009 Update or Other Action Received a letter from RiverCity Development LLC. indicating their pending purchase of Bethel Power Products from ANICA, Inc. RiverCity Development LLC. will be assuming responsibility for future funding of site assessment and cleanup work for the site. Alyce Hughey
9/23/2014 Update or Other Action File transfered to Anchorage Linda Nuechterlein
10/6/2014 Exposure Tracking Model Ranking A new updated ranking with ETM has been completed for source area 77713 UST removals. Joshua Barsis
10/20/2014 Update or Other Action Sent a letter to the RP, which included a brief site summary and request for additional groundwater sampling. Because of the known shallow groundwater, CSP requested that groundwater samples be collected between June and August 2015. Joshua Barsis
10/8/2015 Update or Other Action Follow up letter sent on this day. Work plan requested by January 1, 2016. Joshua Barsis
7/5/2016 Update or Other Action Compliance Letter sent on this day. Work plan for further monitoring due September 1, 2016. Joshua Barsis
9/7/2016 Document, Report, or Work plan Review - other Reviewed the Sampling & Analysis Plan, dated August 2016 for the Bethel Power Products site. Proposed activities include installing three monitoring wells, and collected water samples from the three newly installed wells and two existing wells. Joshua Barsis
2/23/2018 Update or Other Action Sent letter on this day requesting that the report for the last field season be submitted by March 15, 2018. Joshua Barsis
9/6/2018 Update or Other Action Compliance Letter sent on this day. Requested report for the last field season be submitted by October 15, 2018. Joshua Barsis
10/16/2018 Document, Report, or Work plan Review - other Reviewed the Monitoring Well Installation & Sampling Report, dated October 2018 for the Bethel Power Products site. The described field effort was completed in October 2016 and consisted of installing three new monitoring wells (MWA, MWB, and MWC), and collecting water samples from the three newly installed wells and two existing wells (MW2 and MW3). All of the wells, except Well MW3, exhibited concentrations of benzene above the Table C groundwater cleanup level (GCL); ranging from 60 µg/l to 2,100 µg/l. Well MW2, which is nearest to the source area and is the most contaminated well, exhibited a concentration of gasoline range organics (GRO) at 87,000 µg/l, benzene at 2,100 µg/l, ethylbenzene at 2,600 µg/l, toluene at 21,000 µg/l, and total xylenes at 14,100 µg/l; all of which exceed the Table C GCLs. The monitoring wells were not surveyed and thus a true groundwater flow direction and gradient could not be provided; however it is inferred in the report that groundwater flows towards the southwest. ADEC does not agree or disagree with this information. Also, the work plan approval letter (dated September 12, 2016) indicates that 10% of samples should be submitted for PAHs and VOCs. This task was not completed. It should also be noted that the water samples were collected using a peristaltic (negative pressure) pump. Thus, there is a sample bias potentially resulting in lower volatile results. The 2018 report indicates that contamination is migrating via the groundwater pathway. Additional monitoring wells are necessary to define the extent of contamination at this site. At a minimum, wells must be placed at the property boundary to determine if contamination is moving off-property or is impacting the surface water pond to the east. ADEC requested a work plan by February 1, 2019 to delineate the extent of contamination in the groundwater, to evaluate potential impacts to surface water, to determine if contamination is migrating off-property, and to evaluate the potential for future vapor intrusion (for future construction purposes) by installing soil-gas probes in the source area. Joshua Barsis
4/4/2019 Document, Report, or Work plan Review - other Reviewed the April 1, 2019 Draft Groundwater and Soil Site Characterization Work Plan. Proposed activities generally include collection of soil samples and water samples from 5 newly installed soil borings planned to be completed as monitoring wells, decommissioning of one damaged monitoring well, and collection of water samples from 2 surface water locations. The work plan also included a brief discussion of vapor intrusion, in which it was concluded that the vapor intrusion pathway is incomplete because building are not expected in the future, and any future building will be built on pilings (not in contact with the ground). ADEC approved this plan with the following comment: please keep in mind that the extent of contamination must be bounded in all directions, including upgradient. Joshua Barsis
7/21/2021 Update or Other Action J. Fix assigned as new Project Manager. Julie Fix

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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
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