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Superfund Site Report: UMATILLA ARMY DEPOT (LAGOONS)
 
 
  • Map Locating Superfund Site
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  • Site Description
    Stage of Clean-up: Construction Underway

    Conditions at proposal (October 15, l984): Since 1941, Umatilla Army Depot Activity has occupied about 20,000 acres in northeastern Oregon 6 miles south of the Columbia River in Hermiston, Umatilla County. This NPL site consists of lagoons covering about 0.5 acre. They are contaminated with wastes from explosives as a result of past demilitarization and disposal operations. The major contaminants identified on the base include explosive-derived wastes (RDX, TNT, and nitrate), pesticides (DDT and LINDANE), organic solvents (TETRACHLOROETHYLENE and TRICHLOROETHYLENE), and caustic brine. RDX and nitrates are present in ground water beneath the lagoons. This ground water contamination might affect public water supplies serving about 24 people. The Umatilla Army Depot is participating in the Installation Restoration Program, established in l978. Under this program, the Department of Defense seeks to identify, investigate, and clean up contamination from hazardous materials.  More...

    Sources of Contamination:
    • Explosive disposal/detonation
    • Incineration residuals handling
    • Lagoon disposal
    • Landfill
    • Storage - raw material
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  • Threats and Contaminants
    Contaminants Detected

      Ground
    Water
    Surface
    Water
    Air Soil Other
    2,4,6-TRINITROTOLUENEX    
    CYCLONITEX    
    DDT    X
    NITRATE COMPOUNDSX    
    SODIUM CYANIDE    X
    TOLUENE    X
    TRICHLOROETHYLENE    X


    Groundwater and Drinking Water

    Were drinking water wells shut down due to contamination? No
    Are drinking water wells potentially threatened? Yes
    Population served by the threatened wells: No data
    Aquifer discharges into: Surface water
    Population served by water wells in the aquifer: No data
     
    List ground water uses.
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  • Pre-Cleanup Rankings
    EPA Hazard Ranking System scores for UMATILLA ARMY DEPOT (LAGOONS):

    Less Hazard National Average More Hazard
    0%         50%         100%

    Overall site:
    Ground water migration:


    Rank Superfund sites in the U.S., OREGON, or in MORROW County by EPA Hazard Ranking Scores.

    *Note: EPA's Hazard Ranking System is designed to screen and prioritize sites for the Superfund program, based on limited data available at time of listing. These scores are not based on a comprehensive risk assessment of the site and do not reflect conditions after initiation of cleanup work.
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  • Site Information
    Site Name: UMATILLA ARMY DEPOT (LAGOONS)
    EPA ID: OR6213820917
    Address: I-84 & EXIT 178
    HERMISTON, OR 97838
    Other Names: UMATILLA ARMY DEPOT (LAGOONS)
      UMATILLA DEPOT ACTIVITY
      USARMY UMATILLA DEPOT ACTIVITY
    Site Ownership: Federally Owned
    Category of Site: Military Related
    Date of Final Listing on the NPL: July 22, 1987
     
    List Standard Industrial Classifications (SIC) associated with current and past activities at the UMATILLA ARMY DEPOT (LAGOONS) Superfund site.
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  • Potentially Responsible Party (PRP) Involvement
    Number of PRPs currently associated with this site: 0
    Hazardous waste received from off-site generators/transporters? No
    Number of past and present PRPs who contributed less than 1% of the waste: 0
    Number of owners/operators which are also municipalities: 0
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