| Action Date |
Action |
Description |
DEC Staff |
| 12/15/1993 |
Preliminary Assessment Approved |
PA action added by Shannon and Wilson, Inc., on 2/20/97. Based on FUDS Site Summary dated 2/21/96, PA completed 12/93, revised and final completed 6/3/94. |
S&W-Miner |
| 6/3/1994 |
Update or Other Action |
Based on Shannon and Wilson entry from FUDS Site Summary dated 2/21/96, Final PA revised and completed 6/3/94. |
S&W-Miner |
| 2/20/1997 |
Site Added to Database |
Site added by Shannon and Wilson, Inc. |
S&W-Miner |
| 10/19/1999 |
Update or Other Action |
ADEC received a Preliminary Assessment report from EPA, prepared by Ecology and Environment, dated September 1999. The October 12, 1999 cover letter states that EPA does not anticipate doing any further action under the Superfund program. Elevated concentrations of two SVOCs were found in source area samples, as was arochlor 1260 (PCB). Pentalchlorophynol (PCP) and benzoic acid were found in the surface water migration pathway, but not in source area samples. The report concludes that no organic contaminants appear to be migrating from the site and impacting targeted receptor areas. The Corps of Engineers plans to remove fuel tanks and drums from the site in the year 2000. |
John Halverson |
| 2/15/2008 |
Update or Other Action |
File number given: 2661.38.010 |
Nicole Hurt |
| 5/30/2008 |
Exposure Tracking Model Ranking |
Initial ranking with ETM completed. |
Jill Taylor |
| 12/1/2016 |
Meeting or Teleconference Held |
CS managers participate in the annual FUDS site management action plan meeting. The purpose of the is to collaborate with FUDS management on site progress and prioritization for all of the formerly used defense sites. FUDS prioritization is based on risk, congressional interest, state input and proximity to other sites on the prioritization list. FUDS has increased environmental restoration funding in Alaska for the 2017 and 2018 field seasons to meet National goals for site progress. |
Darren Mulkey |
| 4/27/2017 |
Document, Report, or Work plan Review - other |
ADEC received and reviewed the Cape Prominence, FUDS, CON/HTRW Site Investigation Work Plan May 2017. The 1999 PA/SI adequately identified potential environmental impacts, however several data gaps exist and need to be addressed. The 2017 field work will address these data gaps by conducting additional inspection and investigation. The primary purpose of this site investigation is to gather information to perform a limited Containerized Hazardous, Toxic or Radioactive Waste (CON/HTRW) action. |
Darren Mulkey |
| 5/16/2018 |
Site Characterization Report Approved |
ADEC approves the 'Final Site Investigation Report, Cape Prominence FUDS, Unalaska Island, May 2018', in a letter dated May 16, 2018. During this site investigation, soil, sediment, and surface water were sampled at both the Upper Camp and Lower Camp. It was determined that the most significant COPCs in soil were DRO and RRO. Maximum concentrations for these contaminants at the site were detected at the Powerhouse UST (Lower Camp), with DRO reaching 35,000 mg/kg and RRO reaching 13,000 mg/kg. No surface water analytical results exceeded screening criteria; exceedances in sediment included nickel, acenapthene, and acenapthylene. |
Sammi Castle |
| 5/2/2019 |
CERCLA Removal Action Plan |
The general objectives of the removal action (RA) task order, as described in the project scope of work (SOW), include the following:
• Remove, transport, and dispose of aboveground storage tanks (ASTs), underground storage tanks (USTs), and any residual tank contents;
• Remove, transport, and dispose of drums and/or drum-related debris and contents;
• Remove, transport, and dispose of petroleum, oil, and lubricant (POL)-contaminated soil;
• Remove, transport, and dispose of mercury-contaminated soil;
• Install, sample, and decommission groundwater monitoring wells;
• Perform soil sampling for total organic carbon; and
• Perform surface water sampling.
|
Darren Mulkey |
| 5/2/2019 |
CERCLA Removal Action Plan |
ADEC approved the "2019 Final Removal Action Work Plan, Cape Prominence FUDS, Unalaska Island, Alaska". The overall objective of the project at the Cape Prominence FUDS is to remove sources of contamination, both containerized and incidental contaminated soil and debris. The primary drivers for the cleanup of contamination at the Cape Prominence FUDS are the potential risk to natural resources in addition to protection of human health. |
Darren Mulkey |
| 3/18/2020 |
CERCLA Removal Action Report |
Removal Action Report. The overall objective of the project at the Cape Prominence FUDS was to remove sources of contamination, both containerized and incidental contaminated soil and debris, at site feature locations identified as the Upper and Lower Camps. The primary drivers for the cleanup of contamination at the Cape Prominence FUDS were potential risk to natural
resources in addition to protection of human health. Bristol successfully removed scoped volumes of metallic debris (i.e., aboveground storage tanks [ASTs], underground storage tanks [USTs], drums, and drum remnants) and associated petroleum, oil, and lubricant (POL)-impacted soils. Bristol decommissioned tanks and consolidated and removed drum and drum remnants, which included the consolidation and removal of 4,295 pounds of metallic debris. Bristol excavated and
removed a total of 100 tons of POL-impacted soils from the Upper Camp site feature, 1,009 tons of POL-impacted soils from the Lower Camp Powerhouse site feature, and 10 tons of low-level mercury/POL-impacted soils from the Lower Camp Standby Powerhouse site feature. |
Darren Mulkey |
| 7/31/2020 |
CERCLA Removal Action Plan |
Approved Work Plan Addendum, Incidental Contaminant Removal Action, Cape Prominence, July 2020. |
Darren Mulkey |
| 3/16/2022 |
Final Cleanup Report Reviewed |
ADEC reviewed and approved the Project Closeout Report. The report summarizes the field inspection, preliminary assessment/site inspection, site investigation, and removal actions at the Upper and Lower Camp sites at the Cape Prominence Aircraft Warning Service Station in Unalaska Island, Alaska. |
Ginna Quesada |
| 5/2/2022 |
Cleanup Complete Determination Issued |
The ADEC has completed a review of the environmental records associated with the Cape Prominence Aircraft Warning Station (AWS) located at South Side of Unalaska Island. Based on the information provided to date, it has been determined that the contaminant concentrations remaining on site do not pose an unacceptable risk to human health or the environment and no further remedial action will be required unless information becomes available that indicates residual contaminants may pose an unacceptable risk. |
Ginna Quesada |
| 5/2/2022 |
Exposure Tracking Model Ranking |
A new updated ranking with ETM has been completed for source area 73805 Storage Tanks/Drums/Soil. |
Ginna Quesada |
