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Washington Hazardous Substance Storage: What you need to know

Governing Law and Regulations

Hazardous waste: Washington Administrative Code (WAC) 173-303-630 to 173-303-645

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Underground storage tanks (USTs): WAC 173-360-300 to 173-360-399

Toxics control: Revised Code of Washington (RCW) 70.105D.020

Hazardous substance tax: RCW 82.21.030

Regulatory Agencies

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

U.S. Environmental Protection Agency (EPA) Region 10

Local fire departments

See ADDRESSES & CONTACTS for addresses and telephone numbers.

See national section for basic information and federal regulations.

Comparison: State vs. Federal

Rules. Washington generally follows federal rules for hazardous substance storage for hazardous waste containers, tanks, and USTs. See the national section HAZARDOUS SUBSTANCE STORAGE for more information about the federal rules. Also, be sure to check the definition of hazardous substance that applies to your particular facility or process as Washington has a broader definition than the federal. See the national section HAZARDOUS SUBSTANCE STORAGE for additional guidance.

The state has adopted the national Uniform Fire Code that regulates the installation, modification, removal, abandonment, and closure of ASTs. Local fire departments enforce the state fire code at state-licensed facilities. Local fire and building codes may be more stringent than state AST rules. See the state section ABOVEGROUND STORAGE TANKS for a discussion of AST rules in Washington.

Washington incorporated the federal rules by reference for USTs. The state Fire Code requires certification for certain UST activities. Washington requires certification for certain activities and site assessment exams. UST permits are required to install, ...


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State Requirements

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Washington Hazardous Substance Storage Resources

Hazardous Substance Storage Products

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