| Action Date |
Action |
Description |
DEC Staff |
| 5/1/2000 |
CERCLA RI Report Approved |
The Comprehensive Remedial Investigation Report was received. This document discusses the field activities and results from 1996, 1997, 1998, and 1999. Activities included site investigations (SI), Interim Removal actions (IRA) and Remedial Investigations (RI). These various activities were performed at 56 sites throughout the entire Amaknak/Unalaska FUDS. Sampling was conducted to determine both site-specific as well as background levels of contaminants of concern. 93 USTs, 1 AST, associated piping, and 230 drums, contaminated liquid, sludge, and soil were removed during the IRA. Soil borings were drilled, monitoring wells installed and samples were taken to determine type and extent of contamination. Where appropriate a Method Three ACL was calculated. 31 sites are recommended for no further action (NFA) and 25 sites were recommended for further remedial action. The report recommends further action at Building 627. Reconnaissance activities confirmed the presence of the vault. Although no surface impacts were visitble, oil, water and sludge were observed in previous investigations. After coordination with SHPO, the fluids in the vault whould be removed and the soil investigated for POL impacts in the subsurface. |
Meghan Dooley |
| 6/21/2002 |
Update or Other Action |
DEC received the Groundwater Monitoring Program 2001 Annual Report for the Pre-WWII Tank Farm and Rocky Point, dated June 2002, by Jacobs Engineering. |
Meghan Dooley |
| 12/31/2003 |
Update or Other Action |
DEC received the Groundwater Monitoring Program 2002 Annual Report for the Pre-WWII Tank Farm and Rocky Point, dated December 2003, by Jacobs Engineering. |
Meghan Dooley |
| 9/23/2004 |
Update or Other Action |
DEC received the Groundwater Monitoring Program 2003 Annual Report for the Pre-WWII Tank Farm and Rocky Point, dated September 2004, by Jacobs Engineering. |
Meghan Dooley |
| 8/18/2011 |
Site Added to Database |
A new site has been added to the database |
Mitzi Read |
| 9/6/2011 |
Exposure Tracking Model Ranking |
Initial ranking with ETM completed for source area id: 79148 name: Bldg 627 |
Meghan Dooley |
| 6/5/2015 |
Update or Other Action |
Received a draft document titled: Dutch Harbor Limited Removal Action Work Plan, Amaknak and Unalaska Islands, Alaska. The work plan outlines the activities planned to investigate twelve formerly used defense sites (FUDS) on the two islands and remove contaminated soil as necessary. The field activities will be carried out in two phases: Phase I is the investigation and will be conducted during the summer of 2015; Phase II is the removal action which will be carried out in the summer of 2016. ADEC File Number 2542.38.009 will be used to track this project, and all paper and electronic files will be housed under this file number. Updates to this data base will be made to each individual site, which can be accessed by its individual file number or by its (Hazard ID) number. The sites are:
2542.38.014 (25716) Mount Ballyhoo Drums;
2542.38.017 (25722) Pyramid Valley USTs (Bldg. 5264);
2542.38.018 (25704) Rocky Point Bldg. 627;
2542.38.023 (25812) Unalaska Valley UST 2674;
2542.38.023 (2882) Unalaska Valley UST 2766;
2542.38.023 (25804) Unalaska Valley Ski Bowl Generator Bldg.;
2542.38.023 (25811) Upper Unalaska Valley 165th Rd. and Ugadaga Rd. UST 3860;
2542.38.027 (25822) Margaret Bay USTs;
2542.38.029 (1884) Fort Mears USTs, Amaknak Island;
2542.38.029 (25816) Fort Mears Hospital UST;
2542.38.029 (25823) Fort Mears UST 820;
2542.38.033 (25843) Summer Bay AST and 55-Gallon Drum.
|
Meredith Savage |
| 8/20/2015 |
Site Characterization Workplan Approved |
The ADEC Contaminated Sites Program received the Final Dutch Harbor Limited Removal Action Work Plan, Amaknak and Unalaska Islands, Alaska. The work plan was not formally approved, but ADEC does not object to the site characterization portions of the work plan. A report should be submitted documenting these site characterization activities. A separate work plan or work plan addendum should be submitted for the limited removal action anticipated for summer of 2016, which details the proposed work as required in 18 AAC 75.360. |
Jessica Morris |
| 5/5/2016 |
Site Characterization Workplan Approved |
The Dutch Harbor Limited Removal Action Work Plan Addendum, Amaknak and Unalaska, Alaska was submitted on May 1, 2016 and approved in May 5, 2016. Two additional test pits and soil removal action are proposed at Building 627. This work is occurring in Summer 2016. |
Holly Weiss-Racine |
| 6/5/2016 |
Update or Other Action |
The 2015 Phase I Investigation Summary Dutch Harbor Limited Removal Action Amaknak and Unalaska Islands, Alaska was submitted on May 1, 2016 and approved by ADEC. This report discussed Phase I RA activities at 9 sites. Six test pits were excavated at Building 627 and found PAHs above cleanup levels in TP03. The report recommends additional test pit delineation along the southern edge of the building foundation and future soil removal actions. |
Holly Weiss-Racine |
| 10/21/2016 |
Document, Report, or Work plan Review - other |
The 2016 Phase II Dutch Harbor Limited Removal Action Report for 9 sites on Amaknak and Unalaska Islands, Alaska was submitted on October 4, 2016 for review by ADEC. Excavation activities were conducted at this site in 2016. Test pits TP03 and TP07 were excavated to bedrock. DRO exceedances of the ADEC cleanup level, as well as, exceedances of the site specific cleanup level (2,300 mg/kg) are still present in adjacent soils. The test pits were backfilled with clean soil and the USACE recommends no further action at this site. |
Holly Weiss-Racine |
| 5/31/2017 |
Update or Other Action |
ADEC received the “Annual Area-Wide Groundwater Monitoring and Operations and Maintenance Report - 2016” for the RPMA by Stantec on behalf of Chevron and Delta Western. |
Linda (Qi) Liu |
| 10/23/2017 |
Update or Other Action |
ADEC approved final Dutch Harbor Limited Removal Action Report. |
Linda (Qi) Liu |
| 11/3/2017 |
Update or Other Action |
ADEC received, commented and approved "Sampling and Analysis Plan for Groundwater Monitoring and Operations and Maintenance" for RPMA area. The plan was submitted by Stantec on behalf of Chevron and Delta Western. |
Linda (Qi) Liu |
| 6/30/2018 |
Update or Other Action |
ADEC received "RPMA – Annual Area-Wide Groundwater Monitoring and Operations and Maintenance
Report - 2017" for RPMA area. The plan was submitted by Stantec on behalf of Chevron and Delta Western. |
Rachael Petraeus |
| 8/11/2021 |
Document, Report, or Work plan Review - other |
Bulk action for all sites within the Rocky Point Management Area Operational Area Boundaries. ADEC received the Annual Area-Wide Groundwater Monitoring and Operation and Maintenance Report – 2020 for the Rocky Point Management Area in Dutch Harbor, Unalaska on May 26, 2021. Activities included inspection and maintenance of the Thermal Treatment Area (TTA) oil-water separator (OWS) and sedimentation basin; the East Point Loop Road (EPLR) OWS and sedimentation basin; and the TTA groundwater interceptor trench, collection vaults, and surface water drainage culverts. Light nonaqueous-phase liquid (LNAPL) recovery O&M activities at monitoring wells MWRP-24 and MWRP-37 are ongoing, and in 2020 were conducted on a monthly basis at monitoring well MWRP-24 and on a weekly basis at monitoring well MWRP-37. The frequency of the groundwater monitoring and O&M activities at the Rocky Point Management Area (RPMA) was reduced from semiannual to annual in 2019. ADEC recommends MWRP-15 is added to the list of wells to be sampled for Diesel Range Organics (DRO), Gasoline Range Organics (GRO), and Polycyclic Aromatic Hydrocarbons (PAHs). Additionally, ADEC requests some recommendations are provided regarding the access to monitoring wells, particularly those with free product historically observed. Several wells were unable to be sampled due to being located under shipping containers. Responses sent on July 16, 2021. |
Cascade Galasso-Irish |
| 7/7/2022 |
Document, Report, or Work plan Review - other |
Bulk action entry for the RPMA - ADEC received the Annual Area-Wide Groundwater Monitoring and Operations and Maintenance Report – 2021 Rocky Point Management Area Dated April 2022. The 2021 annual groundwater monitoring and operations and maintenance (O&M) activities included inspection and maintenance of the Thermal Treatment Area (TTA) oil-water separator (OWS) and sedimentation basin; the East Point Loop Road (EPLR) OWS and sedimentation basin; and the TTA groundwater interceptor trench, collection vaults, and surface water drainage culverts. Annual groundwater monitoring is conducted at the Rocky Point Management Area (RPMA), and O&M operations also include the ongoing light non-aqueous phase liquid (LNAPL) recovery at wells MWRP-24 and MWRP-37, which are conducted monthly.
Due to project organization changes since the last work plan was approved in 2017, ADEC requests an updated work plan will be provided to ADEC for review and approval prior to the 2023 field efforts. In future reporting, ADEC requests the hazardous wastes and contaminated media derived from the RPMA groundwater monitoring are catalogued and a Transport, Treatment and Disposal form is provided to ADEC for review and approval in accordance with 18 AAC 75.325(i) when the wastes are transferred to a final destination.
Per comment resolution, ADEC no longer supports discharge of purge water to the ground surface without granular activated carbon (GAC) treatment or being containerized and disposed of off-site. ADEC may approve foregoing soil sampling at this time if groundwater is handled appropriately in subsequent annual sampling. However, prior to site closure, soil sampling will need to occur to verify residual contamination is below current cleanup levels.
ADEC concurs with the recommendations for the 2022 season in the cover letter submitted with the 2021 report.
ADEC approved the final report on this date. |
Cascade Galasso-Irish |
| 6/2/2023 |
Document, Report, or Work plan Review - other |
On this date, DEC reviewed and approved the Final Sampling and Analysis Plan, Area-Wide Groundwater Monitoring and Operation and Maintenance Sampling and Analysis Plan, Rocky Point Management Area, Unalaska, Alaska. |
Cascade Galasso-Irish |
| 1/25/2024 |
Document, Report, or Work plan Review - other |
Bulk action entry for review of the Draft Restoration Summary Report Containerized Hazardous, Toxic, and Radioactive Waste, Amaknak Formerly Used Defense Sites, recommending closure at 53 sites. DEC received the draft summary report on April 2023, and provided comments on June 2023. On January 15, 2024, FUDS submitted a final summary report. Comment resolution has not been performed and is not complete. Further coordination is necessary with FUDS. |
Cascade Galasso-Irish |
| 2/22/2024 |
Document, Report, or Work plan Review - other |
On this date, DEC reviewed and approved the redline final, RTCs, and final Restoration Summary Report for the Amaknak Formerly Used Defense Sites F10AK0841-13, -14, -15, -16, -18, -20, Unalaska Valley, Pyramid Valley-Port Levashef, Summer Bay-Humpy Cove, Margaret Bay-Airport, Mount Ballyhoo, and Little South America in Unalaska, Alaska.
Of the 53 sites included in this report, 39 of these sites are either closed in the Contaminated Sites database or are not eligible active sites. Fourteen (14) sites remain open in the CS database, either pending further coordination on the pathway to closure or are currently with DEC management for closure decision. This letter is documenting the approval of the final document but does not preclude the need for further investigation of sites included in the report. |
Cascade Galasso-Irish |
| 5/28/2024 |
Document, Report, or Work plan Review - other |
The objectives of the 2023 field effort were to conduct annual
groundwater monitoring and operation and maintenance (O&M) activities at the Rocky Point
Management Area (RPMA) and inspect and maintain groundwater wells. O&M activities are
conducted annually to inspect and maintain the oil water separator (OWSs) and sedimentation
basins at the Thermal Treatment Area (TTA) and the East Point Loop Road (EPLR) facilities, as
well as inspecting and maintaining the TTA groundwater interceptor trench, collection vaults,
and surface water drainage culverts. |
Kathleen Iler-Galau |
