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Preliminary Draft NPDES Stormwater Permits for U.S. Navy Facilities in Puget Sound

Below are three preliminary draft municipal separate storm sewer system (MS4) permits that EPA has submitted to the Washington Department of Ecology for certification under Clean Water Act Section 401.

Following Ecology’s response to this certification request, EPA intends to initiate a public review and comment period for these draft permits.

For more information, contact Misha Vakoc (, 206-553-6650.

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