Site Report: Eielson AFB (SS098) Rail Line Release
| Site Name: | Eielson AFB (SS098) Rail Line Release |
|---|---|
| Address: | E of Building 2347, Between the E Bank of Garrison Slough and the Railroad Tracks, Eielson AFB, AK 99702 |
| File Number: | 107.38.139 |
| Hazard ID: | 26517 |
| Status: | Active |
| Staff: | Axl LeVan, 9074512156 axl.levan@alaska.gov |
| Latitude: | 64.684174 |
| Longitude: | -147.090973 |
| 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
This site was discovered in 2013 adjacent to SS067. The site is to the east of Building 2347 (Facility 2274), across Garrison Slough, and includes the terrain that slopes uphill from the Slough bank to the rail line. A supplemental remedial investigation was being conducted at SS067 in 2013. The source of polychlorinated biphenyls (PCBs) at SS067 was a transformer pad near the uphill end of a drainage ditch that fed into Garrison Slough from the west. All sample results on the west side of the slough were within the clean-up levels established for SS067 in the record of decision (10 mg/kg). As sampling progressed to the east of Garrison Slough and uphill toward the rail line to establish the land use control boundary, soil concentrations of PCBs were discovered above Method Two cleanup levels.
Action Information
| Action Date | Action | Description | DEC Staff |
|---|---|---|---|
| 9/28/2015 | Update or Other Action | DEC and EPA jointly approved the "Technical Memorandum: Results of 2014 Sampling for PCBs in Sediment and Surface Soil at Source Area SS67 (Final), Eielson Air Force Base, Alaska dated 28 May 2015" (SS67 Tech Memo). The SS67 Tech Memo describes sampling of PCB-contaminated sediment and soil during 2014 at source area SS067, as well as soil samples taken at SS098. | Melinda Brunner |
| 11/24/2015 | CERCLA SI | The U.S. Air Force (USAF) submitted a Phase 1/Phase 2 Source Evaluation Report (SER) for SS098 to DEC and EPA in accordance with Paragraph 8.6 of the Eielson Federal Facility Agreement. The SER describes sampling results at SS098 that confirm polychlorinated biphenyls in soil above DEC's Method Two cleanup levels. The USAF SER transmittal letter states that the USAF intends to proceed with the investigation/cleanup of the site under CERCLA, and that the site is programmed for a remedial investigation in FY16. | Melinda Brunner |
| 12/10/2015 | Update or Other Action | DEC and EPA sent a joint letter to the USAF confirming receipt of the Phase 1/Phase 2 Source Evaluation Report submitted for SS098 on 11/24/2015. DEC and EPA concurred with the USAF's proposed plan to investigate/cleanup the site in accordance with CERCLA. | Melinda Brunner |
| 2/5/2016 | Site Added to Database | A new site has been added to the database | Mitzi Read |
| 2/8/2016 | Exposure Tracking Model Ranking | Initial ranking with ETM completed for source area id: 79876 name: (SO098) Rail Line Release | Melinda Brunner |
| 3/15/2017 | Document, Report, or Work plan Review - other | DEC Received the draft SS098 RI/FS workplan. | Monte Garroutte |
| 8/2/2017 | CERCLA RI Plan Approved | DEC approved the Remedial Investigation / Feasibility Study Management Plan for Source Area SS098, Eielson Air Force Base, Alaska (July, 2017). | John O'Brien |
| 9/26/2018 | CERCLA RI Report Approved | DEC and EPA jointly approved the "Remedial Investigation/Risk Assessment Report Source Area SS098 Eielson Air Force Base, Alaska," dated August 2018. | Bri Clark |
| 12/3/2018 | Document, Report, or Work plan Review - other | DEC reviewed and provided comments on the "Draft Feasibility Study Source Area SS098, Eielson Air Force Base, Alaska," dated June 2018. | Bri Clark |
| 6/7/2019 | CERCLA FS | DEC accepted responses to comments and pending any unresolved comments or concerns from the USEPA, provided approval to finalize the Draft Final Feasibility Study, Source Area SS098, Eielson Air Force Base, Alaska, May 2019. The Feasibility Study proposed remedial alternatives to address polychlorinated biphenyls (PCBs), and pesticides (4,4’-DDD, and dieldrin). | Dennis Shepard |
| 1/12/2022 | Document, Report, or Work plan Review - other | DEC requested an Extension of Formal Dispute Notification Timeline Identified in Paragraph 21.2 of the Eielson Air Force Base Federal Facilities Agreement (FFA) for Site SS098 Draft Final Remedial Investigation /Risk Assessment Report (Remedial Investigation /Risk Assessment Report, Source Area SS098, Eielson Air Force Base, Alaska, Final Revision 2 dated December 2020). The extension was requested so that the USAF, EPA and DEC can engage in an informal dispute resolution process in accordance with Paragraphs 21.1 and 21.3 of the Eielson FFA. | Dennis Shepard |
| 3/30/2022 | Meeting or Teleconference Held | The United States Air Force (USAF) proposed to put a hold on informal dispute resolution discussions for SS098. During the informal dispute resolution discussions, the issue of a deferred ecological risk assessment was identified. The ecological risk assessment for SS098 had been approved to be integrated with Garrison Slough source area SS062 The USAF, EPA and DEC Remedial Project Managers agreed that any further discussions should wait until a human health and ecological risk assessment have been completed for the Garrison Slough source area SS062. Once risk has been evaluated, further discussion of potential remedial actions for SS098 will be undertaken. | Dennis Shepard |
Contaminant Information
| Name | Level Description | Media | Comments |
|---|
Control Type
| Type | Details |
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Requirements
| Description | Details |
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| Hazard ID | Site Name | File Number |
|---|---|---|
| 377 | Eielson AFB (OU-7)(SS067) Garrison Slough PCBs | 107.38.054 |