U.S. EPA Contaminated Site Cleanup Information (CLU-IN)

U.S. Environmental Protection Agency
U.S. EPA Technology Innovation and Field Services Division
Umatilla Army Depot, Hermiston, OR
Federal Facility, Superfund NPL

Cleanup Objectives: Treat 15,000 tons of soil contaminated with explosives such as trinitrotoluene (TNT) and royal demolition explosives (RDX)

Green Remediation Strategy: Composted with locally obtained feedstock

  • Used Windrow techniques involving placement of soil in lengthy piles
  • Periodically mixed soil with a mixture of cattle/chicken manure, sawdust, alfalfa, and potato waste
  • Mixed soil with feedstock inside mobile buildings to control fumes and optimize biological activity


  • Treated each 2,700-cubic-yard batch of soil in 10-12 days
  • Destroyed contaminant byproducts or permanently bound byproducts to soil or humus, with non-detectable concentrations of explosives.
  • Provided $150,000 potential end-revenue from sale of humus-rich soil
  • Saved an estimated $2.6 million compared to incineration, a common alternative for explosives treatment
  • Avoided significant fossil fuel consumed by an incinerator
  • Avoided fuel costs/consumption associated with transporting soil to an offsite incinerator or transferring ash generated by an onsite mobile incinerator

Property End Use: Privatization under base realignment and closure

Point of Contact: Harry Craig, U.S. EPA Region 10

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