Site Report: Beluga River Abandoned Diesel Tank Farm
| Site Name: | Beluga River Abandoned Diesel Tank Farm |
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| Address: | NW side of Cook Inlet, Beluga River Gas Field, Tyonek, AK 99682 |
| File Number: | 2337.38.015 |
| Hazard ID: | 1000 |
| Status: | Active |
| Staff: | Peter Campbell, 9072623412 peter.campbell@alaska.gov |
| Latitude: | 61.158328 |
| Longitude: | -151.055127 |
| Horizontal Datum: | WGS84 |
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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
Hydrocarbon soil contamination at abandoned tank farm. The highest extractable petroleum hydrocarbon (EPH) concentrations in all borings were obtained at the water table 13 feet below grade. Samples from below the water table (14 to 15.5 feet) contained EPH concentrations ranging from 13 to 71 milligrams per kilogram (mg/kg). Samples collected above the water table in all borings ranged from 460 mg/kg at 2.5 - 4 feet to 1,700 mg/kg at 8 - 9.5 feet.
Action Information
| Action Date | Action | Description | DEC Staff |
|---|---|---|---|
| 4/23/1992 | Site Added to Database | Former Staff | |
| 1/4/1993 | Site Ranked Using the AHRM | Surface water value changed from site managers form. | Former Staff |
| 5/21/2004 | Update or Other Action | File number assigned and entered into the Fileroom DB and CS DB. | Alyce Hughey |
| 7/25/2005 | GIS Position Updated | Using Figure 1 from Abandoned Diesel Tank Farm Report from ENSR Consulting and Engineering, dated January 23, 1992, in conjunction with TopoZone Pro, entered the coordinates for this site. Metadata include No Topo Basemap, Black and White Aerial Photo, on a Medium Size Map, View Scale 1:10,000, Coordinate Datum NAD83. High degree of confidence in accuracy of location. | Alyce Hughey |
| 2/1/2006 | Update or Other Action | File name changed from ARCO Abandoned Diesel Tank Farm to Beluga River Abandoned Diesel Tank Farm on 2-1-06 per Don Fritz. | Alyce Hughey |
| 6/17/2008 | Exposure Tracking Model Ranking | Initial ranking with ETM completed. | Don Fritz |
| 11/16/2011 | Update or Other Action | Site transferred from Don Fritz to Peter Campbell per Paul Horwath. | Alyce Hughey |
| 3/20/2019 | Workplan Requested | In 1992 hydrocarbon soil contamination was identified at the abandoned tank farm. The highest extractable petroleum hydrocarbon (EPH) concentrations in all borings were obtained at the water table 13 feet below grade. Samples from below the water table (14 to 15.5 feet) contained EPH concentrations ranging from 13 to 71 milligrams per kilogram (mg/kg). Samples collected above the water table in all borings ranged from 460 mg/kg at 2.5 - 4 feet to 1,700 mg/kg at 8 - 9.5 feet. Prepare a work plan for the sampling of existing monitoring wells. | Peter Campbell |
| 5/19/2020 | Update or Other Action | Requested an update for the work plan from Nixon. | Peter Campbell |
| 4/20/2021 | Workplan Requested | Reiterate requirement for work plan from 2019. | Peter Campbell |
| 6/30/2021 | Document, Report, or Work plan Review - other | Work plan for 2021 Characterization approved. | Peter Campbell |
| 1/25/2022 | Document, Report, or Work plan Review - other | 2021 Interim Groundwater Monitoring Report – ADEC Comments: The report recommends sampling wells an additional time and moving the site towards closure. Request that Hilcorp provide an assessment of the site, including groundwater flow characteristics. Include a narrative site history. The assessment should be written with enough detail to support a closure decision. Are the remaining wells in a location that is representative of historical groundwater impacts? What are the current operation conditions at the pad? Evaluate the site and determine if additional investigation is necessary to close the site with confidence. It may be important to explore deeper into the aquifer to determine the vertical extent of contamination at this site. | Peter Campbell |
| 8/3/2023 | Workplan Requested | The property in question is owned by the Kenai Peninsula Borough. The monitoring wells sampled indicate that groundwater contamination has attenuated over time. To close this site, Hilcorp should assess the source area to assure that contaminated soils or groundwater are not present. Hilcorp will submit a work plan to assess the site. If the site is free of contamination below cleanup levels, prepare a detailed site history to document the site conditions for closure. | Peter Campbell |
| 8/22/2023 | Meeting or Teleconference Held | The property is owned by the Kenai Peninsula Borough. One soil boring will be installed in the source location. Soil samples will be collected from the smear zone and from the location with the highest PID result. If there is evidence of subsurface contamination, a temporary well will be installed. Soil and groundwater samples will be analyzed for GRO, DRO, BTEX, and PAHs. If the source boring is clean, Hilcorp can move the site towards closure. | Peter Campbell |
| 8/30/2023 | Document, Report, or Work plan Review - other | 2022 Groundwater Monitoring Report review and approval | Peter Campbell |
| 9/13/2023 | Long Term Monitoring Workplan or Report Review | 2023 Site Characterization and Groundwater Sampling Work Plan Beluga River Abandoned Diesel Tank Farm ADEC Work Plan Approval | Peter Campbell |
Contaminant Information
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Control Type
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Requirements
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No associated sites were found.