Washington Land Treatment regulations & environmental compliance analysis

Washington Land Treatment: What you need to know

Governing Law and Regulations

Dangerous waste (DW) land treatment rules: Washington Administrative Code (WAC) 173-303-655, WAC 173-303-400(3)(a), and WAC 173-303-400(3)(c)(iv) (interim status)

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DW land treatment disposal restrictions: WAC 173-303-140

Treatment zone: WAC 173-303-655

Regulatory Agency

Washington Department of Ecology (WDOE) Hazardous Waste and Toxics Reduction Program

See ADDRESSES & CONTACTS for addresses and telephone numbers.

See national section for basic information and federal regulations.

Comparison: State vs. Federal

Rules. Washington's dangerous waste (DW) land treatment requirements include both the federal hazardous waste land treatment rules and the state's more stringent requirements. The state's requirements restrict the hazardous wastes that may be disposed of in the land treatment facility, the facility's treatment zone, facility performance standards, and post-closure care.

For information on Washington's rules for landspreading solid (nondangerous) waste facilities, see the state section SOLID WASTE.

Administration and enforcement. WDOE's Hazardous Waste and Toxics Reduction Program administers and enforces both the dangerous and solid (nondangerous) waste land treatment requirements in Washington.

State Requirements


Land Disposal Restrictions

WAC 173-303-140

Washington incorporates by reference the federal land disposal restrictions (LDRs) and adds its own disposal prohibitions and specific exemptions from those prohibitions. The federal LDRs are reviewed in the national section LAND DISPOSAL RESTRICTIONS/LAND BAN.

Treatment Zone

WAC 173-303-655

Depth. Washington's standard for the depth of the treatment zone at land treatment facilities is ...

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