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Site Report: Dutch Hbr-Unalaska Vly Ugadaga Quarry Drums

Site Name: Dutch Hbr-Unalaska Vly Ugadaga Quarry Drums
Address: Ugadaga Road; Hillside Near Lower Ugadaga Quarry, Unalaska, AK 99685
File Number: 2542.38.023
Hazard ID: 25805
Status: Cleanup Complete
Staff: No Longer Assigned, 9074655229 dec.icunit@alaska.gov
Latitude: 53.851098
Longitude: -166.490759
Horizontal Datum:WGS84

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 is located on the hillside near the lower Ugadaga Quarry. Twenty-six 55-gallon and one 5-gallon drum, and 1 cubic yard of soil were removed from the site in 2002. Four surface and four subsurface soil samples were taken to determine the nature and extent of contamination. DRO concentrations ranged from 9,000 to 29,000 mg/kg. RRO concentrations ranged from 49,000 to 110,000 mg/kg. Four cubic yards of soil were removed in 2005 based on the soil sample results from 2002. After confirmation samples, 1 additional cubic yard was removed and all samples were below cleanup levels. Groundwater was not encountered during excavation activities, therefore the groundwater pathway has not been investigated.

Action Information

Action Date Action Description DEC Staff
2/6/2012 Site Added to Database A new site has been added to the database Mitzi Read
3/8/2022 Exposure Tracking Model Ranking Initial ranking with ETM completed for source area id: 79237 name: Dutch Hbr-Unalaska Vly Ugadaga Quarry Drums Cascade Galasso-Irish
7/7/2022 Document, Report, or Work plan Review - other ADEC received a Sampling and Analysis Plan and associated Quality Assurance Project Plan for the Native American Lands Environmental Mitigation Program (NALEMP) Step II Site Assessment, which outline the procedures that will be followed for the collection of soil samples for chemical analysis at the Erskine Point Fire Control Station and Rock Quarry Drum Dump, and for building demolition and debris removal (BD/DR) at the Driftwood Bay RRS. ADEC provided comments on the sampling at the Ugadaga Quarry Drum site. 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
2/21/2024 Exposure Tracking Model Ranking A new updated ranking with ETM has been completed for source area 79237 Dutch Hbr-Unalaska Vly Ugadaga Quarry Drums . 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
9/4/2024 Meeting or Teleconference Held August 27, 2024 Qawalangin Restoration Advisory Board (RAB) Meeting USACE sites Several DEC staff attended the Qawalangin RAB meeting on October 27, 2024. Sites include Amaknak, Chernofski, Cape Wislow, Fort Learnard, and Ugadaga Bay FUDS. The meeting was both in person and virtual, and held at the Unalaska Public Library. In attendance was the United States Army Corp of Engineers (USACE), ADEC, representatives of the Ounalashka Corporation, the RAB members, and several members of the public. The meeting focused on public comments regarding specific sites of concern and how sites are selected for upcoming seasonal work by the USACE. There is public concern regarding a site with contamination that could impact areas that have been cleaned, and questions regarding health issues of community members. The USACE listened to the public comments and answered questions. USACE will be working with the RAB to receive more public input, and they also agreed to meet with the Ounalashka Corporation. Kathleen Iler-Galau
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
1/8/2025 Cleanup Complete Determination Issued DEC has reviewed the environmental records associated with the Dutch Hbr-Unalaska Vly Ugadaga Quarry Drums site, located on Ugadaga Road, approximately 2.5 miles southeast of Unalaska, Alaska. 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. Kathleen Iler-Galau

Contaminant Information

Name Level Description Media Comments
RRO < Method 2 Most Stringent Soil Detected CoC concentrations on site are below the most stringent DEC cleanup levels following cleanup activities. The highest remaining concentrations in the soil for DRO was 72.9 mg/kg, and RRO was 752 mg/kg.
RRO < Method 2 Most Stringent Soil Detected CoC concentrations on site are below the most stringent DEC cleanup levels following cleanup activities. The highest remaining concentrations in the soil for DRO was 72.9 mg/kg, and RRO was 752 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.

Missing Location Data

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State of Alaska Department of Environmental Conservation

P.O. Box 111800
Juneau, AK 99811-1800
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