Site Report: Dutch Hbr-Fort Mears UST 820
| Site Name: | Dutch Hbr-Fort Mears UST 820 |
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| Address: | Salmon Way; Near Sea Lion Circle, Unalaska, AK 99685 |
| File Number: | 2542.38.029 |
| Hazard ID: | 25823 |
| Status: | Active |
| Staff: | Kathleen Iler-Galau, 9074512153 kathleen.iler-galau@alaska.gov |
| Latitude: | 53.882069 |
| Longitude: | -166.548799 |
| 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
UST MB-820 was located south of Margaret Bay on the north end of Building 820. The UST had an approximate capacity of 480 gallons, and 450 gallons of liquid with diesel odor were removed from the UST. The UST was excavated in 1997 along with associated piping. Approximately 955 cy of impacted soil were also removed as part of the excavation. Impacted soil was observed below the existing foundation of Building 820 as well as groundwater with a petroleum sheen. Approximately 750 gallons of impacted water were recovered before the excavation was backfilled. 9 confirmation soil samples were taken at the base of the excavation and analyzed for DRO, RRO and BTEX. DRO was reported in one sample as 11,000 mg/kg and RRO was reported at 4,300 mg/kg. Two monitoring wells were installed and one groundwater sample was taken, and DRO, RRO, and PAHs were detected. BTEX components were undetected in soil and groundwater.
Action Information
| Action Date | Action | Description | DEC Staff |
|---|---|---|---|
| 2/7/2012 | Site Added to Database | A new site has been added to the database | Mitzi Read |
| 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 | Document, Report, or Work plan Review - other | 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. Three test pits were advanced near UST 820 but none could be sampled due to encountering large boulders and seashell middens. It was concluded that, based on prior evidence,existing contamination remains beneath the building foundation. No further action was recommended. | Holly Weiss-Racine |
| 10/20/2016 | 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. This report repeated the language from the Phase I RA report; no further action recommended at this site due to inaccessible contamination. | Holly Weiss-Racine |
| 10/23/2017 | Update or Other Action | ADEC approved final Dutch Harbor Limited Removal Action Report. | Linda (Qi) Liu |
| 7/5/2019 | Update or Other Action | Site location was updated on this date. Coordinates for this site are used to determine the presence and position of the site on BLM’s ANCSA Conveyed Land web map. | Rebekah Reams |
| 1/31/2024 | Document, Report, or Work plan Review - other | Per the review of the Draft Restoration Summary Report, Containerized Hazardous, Toxic, and Radioactive Waste. 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 (2023), this site is anticipated for FY2024 contract. | Cascade Galasso-Irish |
| 11/6/2024 | Meeting or Teleconference Held | The Qawalangin FUDS Restoration Advisory Board (RAB) Meeting was held at the Unalaska Public Library. This regional RAB incorporates five FUDS in the Qawalangin region: Amaknak FUDS, Chernofski FUDS, Cape Wislow FUDS, Fort Learnard FUDS, and Ugadaga Bay FUDS. RAB Board Members, USACE-FUDS, DEC, and members of the public were in attendance in-person, with additional stakeholders participating virtually. FUDS PMs provided updates on the status of FUDS sites. The RAB membership also updated their charter and added new members. | Kathleen Iler-Galau |
Contaminant Information
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Control Type
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Requirements
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No associated sites were found.