Site Report: Swanson River Tank Setting 4-22
| Site Name: | Swanson River Tank Setting 4-22 |
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| Address: | Mi. 17.5 Swanson River Rd, Sterling, AK 99672 |
| File Number: | 2334.38.025 |
| Hazard ID: | 2066 |
| Status: | Active |
| Staff: | Peter Campbell, 9072623412 peter.campbell@alaska.gov |
| Latitude: | 60.727500 |
| Longitude: | -150.865556 |
| Horizontal Datum: | NAD83 |
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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
Diesel range petroleum contamination encountered in several soil samples collected from a site assessment for a potential site for two 3,000-barrel above ground storage tanks. The tanks were moved from Tank Setting 1-33 in 1994 to the new location about ½ mile east of the compressor plant and are currently out of service. The two 3,000-barrel above ground storage tanks are referred to as tanks 24 and 27. Site previously worked by the Prevention and Emergency Response Program (PERP). Light non-aqueous phase liquid (LNAPL) recovery and annual groundwater monitoring on-going. Contaminant plume appears stable and not expanding. Under current site conditions, risk to human health and the environment is minimal. Due to facility infrastructure, site cleanup is not feasible. Site cleanup will occur at pad abandonment.
Action Information
| Action Date | Action | Description | DEC Staff |
|---|---|---|---|
| 7/29/1994 | Update or Other Action | Letter sent by Joe Sautner to John Beitia (Unocal) stating that soil contamination was detected from samples taken during site assessment performed by RZA AGRA Alaska, Inc. on July 19, 1994. | Former Staff |
| 8/3/1994 | Update or Other Action | Letter sent to John Beitia (Unocal) stating release has occurred, and corrective action needs to be performed. | Don Fritz |
| 8/30/1994 | Update or Other Action | Letter sent by Joe Sautner to John Beitia (Unocal) approving the relocation of Tanks 24 and 27 using a polyurethane coated membrane liner as a secondary containment, and the remediation portion of site to be handled through the KDO concerning site assessment and remediation plans. | Former Staff |
| 1/19/1995 | Update or Other Action | Sent letter to Bruce St. Pierre (Unocal) requesting additional information. | Don Fritz |
| 3/20/1997 | Update or Other Action | Based on additional information received from Bruce Pierre (Unocal) on 7-10-95 and Don Fritz notes on his response "Appears to need additional sampling based on field screening" and the historical contamination was encountered when soil was sampled from a potential site for two above ground storage tanks. PERP turned the site over to CSRP. | Gary Folley |
| 7/25/2003 | Site Added to Database | DRO. | Alyce Hughey |
| 7/25/2003 | Site Ranked Using the AHRM | Initial ranking. | Alyce Hughey |
| 4/30/2004 | Update or Other Action | File number assigned and entered into the Fileroom DB and CS DB. | Alyce Hughey |
| 5/27/2004 | Meeting or Teleconference Held | Monthly progress meeting. Revised NAPL recovery plan to be submitted by 30 June 04. | Donald Seagren |
| 3/21/2005 | Update or Other Action | Reviewed 2004 GW monitoring report. No appreciable change in risk to human health or the environment. | Donald Seagren |
| 10/7/2005 | GIS Position Updated | Using a Swanson River Layout Map from Unocal and Figure 1-2 in the file, in conjunction with TopoZone Pro and the KPB Parcel Lookup, entered the coordinates for this site. Metadata includes No Topo Basemap, TopoZone Pro Street Maps, Black and White Aerial Photo, on a Medium Size Map, View Scale 1:24,000, Coordinate Datum NAD83. High degree of confidence in accuracy of location. | Alyce Hughey |
| 3/9/2006 | Update or Other Action | Reviewed 05 monitoring report. No significant change to risk to human health or the environment. LNAPL recovey and annual monitoring to continue. | Donald Seagren |
| 4/2/2007 | Update or Other Action | Reviewed 06 monitoring report. no significant change to risk to human health or the environment. Annual monitoring and LNAPL recovery to continue | Donald Seagren |
| 5/8/2007 | Exposure Tracking Model Ranking | Donald Seagren | |
| 6/12/2008 | Update or Other Action | Site transferred from Don Seagren to Paul Horwath per Linda Nuechterlein. On 6-30-08 transferred from Paul Horwath to Don Fritz per Paul Horwath. | Alyce Hughey |
| 11/3/2011 | Update or Other Action | This Tank Setting is located next to the Compressor Plant where groundwater monitoring is being conducted. Due to the facility infrastructure site cleanup is not feasible, and site cleanup will occur at pad abandonment. | Alyce Hughey |
| 11/16/2011 | Update or Other Action | Site transferred from Don Fritz to Peter Campbell per Paul Horwath. | Alyce Hughey |
| 7/2/2015 | Update or Other Action | Cleanup in delayed status. | Peter Campbell |
| 6/21/2018 | Update or Other Action | Tanks 24 and 27 at this site are to be moved, without disturbing the secondary containment liner. Site location on the GIS map has been moved from the flare pit to the tank location approximately 950 NNE. | Peter Campbell |
Contaminant Information
| Name | Level Description | Media | Comments |
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Control Type
| Type | Details |
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Requirements
| Description | Details |
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There are no documents for this site report.
No associated sites were found.