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Washington Geothermal Waste & Hazardous Material Assessment(18-WA)

If the developer’s project requires installation of an underground storage tank, then they will be required to obtain approval from WSDE. Developers may also be required to obtain a Dangerous Solid Waste Permit if their project involves dangerous solid wastes as defined in WAC 173-303-070 through WAC 173-303-100.

Developers must obtain an Underground Storage Tank (UST) Permit from WSDE prior to operating an underground storage tank system. Washington defines an “underground storage tank” as any one or combination of tanks (including underground pipes connected thereto) that is used to contain an accumulation of regulated substances, and the volume of which (including the volume of underground pipes) is ten percent or more beneath the surface of the ground. Certain UST systems are exempt from permitting requirements. Exempted systems are identified in WAC 173-360-110(2). Developers must submit a UST 30-day Notice Form to WSDE with payment of the applicable fee at least thirty days and not more than 90 days before installing the UST system. WAC 173-360-200. If WSDE approves the notice, then an Underground Storage Tank System Permit will be issued, and installation may begin. Developers will be required to complete the Business License Application and Underground Storage Tank Addendum and submit the forms to the Washington State Department of Revenue.

Developers must obtain a Dangerous Solid Waste Permit from WSDE if they handle dangerous solid wastes and they are classified as a generator, transporter, or any other classification listed in WAC 173-303-020. Geothermal developers generally do not generate a significant amount of dangerous solid waste, however, they must adhere to this process in the limited scenarios where they do generate such waste. In addition, geothermal developers may be exempted from certain requirements of this process if they qualify as a “small quantity generator.” WAC 173-303-070(8). Developers dealing with wastes categorized as “dangerous wastes” under WAC 173-303-070 will be required to obtain a Dangerous Solid Waste Permit. Developers must submit a Demonstration of Compliance with Siting Criteria, then an application to WSDE for review. WSDE must provide public notice of any decision on the application, and allow for public comment. WAC 173-303-282(4)(d). Developers may be required to participate in a public hearing. WAC 173-303-282(4)(d)(ii)(B).

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Determine Which State and Federal Permits Apply

Use this overview flowchart and following steps to learn which federal and state permits apply to your projects.