Site Report: Dutch Hbr-Unalaska Vly UST 2766
| Site Name: | Dutch Hbr-Unalaska Vly UST 2766 |
|---|---|
| Address: | Choate Lane Building 2766, Tanks A & B, Unalaska, AK 99685 |
| File Number: | 2542.38.023 |
| Hazard ID: | 2882 |
| Status: | Cleanup Complete |
| Staff: | No Longer Assigned, 9074655229 dec.icunit@alaska.gov |
| Latitude: | 53.852500 |
| Longitude: | -166.501111 |
| 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
Two heating oil tanks were removed in 1997 along with 158 cubic yards of impacted soil. Tank A was 600 gallons, and Tank B 300 gallons. DRO was detected at a maximum concentration of 1,100 mg/kg. The building is currently being used as a residence.
Action Information
| Action Date | Action | Description | DEC Staff |
|---|---|---|---|
| 1/23/2003 | Site Added to Database | Unalaska Valley expanded into a total of 26 unique sites from one. | John Halverson |
| 12/8/2003 | GIS Position Updated | TopoZone. | Debra Caillouet |
| 6/10/2005 | Update or Other Action | File number issued 2542.38.023. | Aggie Blandford |
| 6/26/2008 | Exposure Tracking Model Ranking | Initial ranking with ETM completed. | Daniel Fremgen |
| 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 |
| 9/16/2016 | Update or Other Action | A Phase I Site Investigation of 12 sites took place in August 2015. UST 2766 was unable to be investigated as outlined in the work plan because a right-of-entry permit was not obtained prior to the commencement of field work. This work still needs to be conducted. | Holly Weiss-Racine |
| 8/18/2017 | Exposure Tracking Model Ranking | A new updated ranking with ETM has been completed for source area 73858 2 USTs. | Linda (Qi) Liu |
| 10/23/2017 | Update or Other Action | ADEC approved final Dutch Harbor Limited Removal Action Report. | Linda (Qi) Liu |
| 9/27/2023 | Exposure Tracking Model Ranking | A new updated ranking with ETM has been completed for source area 73858 2 USTs. | Cascade Galasso-Irish |
| 9/28/2023 | Cleanup Complete Determination Issued | On this date, the Unalaska Valley UST 2766 site was issued a Cleanup Complete Determination. | 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 |
Contaminant Information
| Name | Level Description | Media | Comments |
|---|---|---|---|
| DRO | Other | Soil | Highest remaining concentrations in soil is 1,100 mg/kg DRO, below the calculated Method 3 Alternative Migration to Groundwater cleanup level of 6,500 mg/kg |
Control Type
| Type | Details |
|---|---|
| No ICs Required |
Requirements
| Description | Details |
|---|---|
| Advance approval required to transport soil or groundwater off-site. | |
| Movement or use of contaminated material (including on site) in a manner that results in a violation of the water quality standards is prohibited (18 AAC 70) |
No associated sites were found.