Washington Neutralization of Wastes regulations & environmental compliance analysis

Washington Neutralization of Wastes: What you need to know

Governing Law and Regulations

Elementary neutralization unit: Washington Administrative Code (WAC) 173-303-040

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Facility permit exemption: WAC 173-303-802(5)

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 refers to hazardous waste as "dangerous waste." Washington's neutralization rules include the federal standards, plus the state's additional permit exemption requirements for elementary neutralization units. The state's additional permit exemption requirements establish strict operating requirements for elementary neutralization units.

Administration and enforcement. WDOE's Hazardous Waste and Toxics Reduction Program enforces the neutralization requirements in Washington.

State Requirements


WAC 173-303-802

Washington provides for a "permit-by-rule" for elementary neutralization units that treat state-only dangerous wastes generated on- or off-site or federally regulated hazardous waste generated on-site. Owners and operators of facilities with permits-by-rule are not required to submit an application for a dangerous waste facility permit if they comply with the federal rules and the following state requirements:

  • Wastewater discharges standards established in the facility's National Pollutant Discharge Elimination System (NPDES) permit.
  • U.S. Environmental Protection Agency identification number requirements (WAC 173-303-060).
  • Identification and designation of dangerous waste procedures (WAC 173-303-070).
  • Facility performance standards (WAC 173-303-283).
  • General ...

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