Washington Hazardous Waste Tanks regulations & environmental compliance analysis

Washington Hazardous Waste Tanks: What you need to know

Governing Law and Regulations

Dangerous waste storage and treatment tank rules: Washington Administrative Code (WAC) 173-303-640; WAC 173-303-400(3)(a) and WAC 173-303-400(3)(c)(ix) (interim status)

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Federal organic air emissions rules: WAC 173-303-690, WAC 173-303-691, and WAC 173-303-692

Tank management requirements for large quantity generators (LQGs): WAC 173-303-200

Tank management requirements for medium quantity generators (SQGs): WAC 173-303-172

Labeling and marking tanks: WAC 173-303-640(5)(d), WAC 173-303-395(6), and WAC 173-303-200(7)(b)(ii)

Location standards: WAC 173-303-282

Tank integrity assessments: WAC 173-303-200(4)(b), WAC 173-303-640(2)(e), and WAC 173-303-640(3)(b)

Toxic air emissions: WAC 173-303-640(5)(e) and WAC 173-303-200(4)(b)

LQG tank inspection log: WAC 173-303-200(3)(d)

Regulatory Agency

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

See national section for basic information and federal regulations.

Comparison: State vs. Federal

Rules. Washington follows the federal hazardous waste tank requirements, including the organic air emissions standards. The state has adopted the U.S. Environmental Protection Agency's (EPA) Hazardous Waste Generator Improvements Rule, effective in Washington as of April 30, 2019, which includes standards for generators accumulating hazardous waste on-site in tanks. In addition, Washington's tank rules include both federal and more stringent state requirements. The state's more stringent requirements are in connection with labeling and marking tanks, location standards, tank integrity assessments, inspections, and toxic air emissions as they apply to hazardous waste treatment, storage, and disposal facilities (TSDFs), large quantity ...

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Washington Hazardous Waste Tanks Resources

Type Title
Checklists TSDF Tank System Inspection Form (EQP 5192)
Forms Daily Tank Inspection Log
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