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Model Toxics Control Act Cleanup Regulation: Process for Cleanup of Hazardous Waste Sites

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This Washington State Department of Ecology fact sheet explains how the Model Toxics Control Act (Initiative 97, 1989) governs the cleanup of hazardous waste sites in Washington, outlining who is liable, how sites are identified, and the options available for conducting cleanups. Potentially liable parties — including past and present owners, operators, and those who transported or disposed of hazardous substances — may clean up sites independently or work cooperatively with Ecology through formal agreements such as consent decrees. Note: this document concerns hazardous waste site cleanup regulation and does not contain information related to Sea-Tac Airport noise policy.

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Washington State Department of Ecology fact sheet (Focus No. 94-129, revised May 2001) describing the Model Toxics Control Act (MTCA), chapter 70.105D RCW, and implementing rules under chapter 173-340 WAC. Covers the cleanup process for hazardous waste sites in Washington, including how sites are identified and listed on the Hazardous Sites List, who qualifies as a potentially liable person, joint and several liability, independent cleanups, the Voluntary Cleanup Program, consent decrees, and agreed orders. Discusses Ecology’s Integrated Site Information System and Leaking Underground Storage Tank databases, the 0.7 percent hazardous substance tax funding mechanism, and WAC 173-340-545 guidance for private contribution actions.

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