Washington State Department of Ecology


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Stormwater (14 publications 2021-2026)


7
Title (link to summary)NumberDate (released or updated)
ISGP 303d New Discharger Form ECY 070-822June 2026
Permit Application for Coverage Under the Sand and Gravel General Permit ECY 070-31February 2026
ISGP Notice of Termination Form ECY 020-86February 2026
Construction Stormwater General Permit Modification/Update ECY 070-558January 2026
CSWGP Notice of Termination Form ECY 020-87November 2025
Industrial Stormwater General Permit Discharge/Sample Point Update ECY 070-373February 2025
Modification of Permit Coverage Form for Industrial Stormwater General Permit ECY 070-361February 2025
Transfer Ownership of Stormwater General Permit for Industrial Facilities ECY 020-84aFebruary 2025
Industrial Stormwater General Permit Application Form (Notice of Intent) ECY 020-84February 2025
Sand and Gravel Permit Portable Beginning of Operations Notice ECY 070-36November 2023
Sand and Gravel Permit Portable Completion of Operations Notice Form ECY 070-30November 2023
Beginning of Deconstruction Notice Form - Vessel Deconstruction General Permit ECY 070-618October 2023
Construction Stormwater General Permit Proposed New Discharge to an Impaired Waterbody ECY 070-399July 2021
Request for Chemical Treatment ECY 070-258April 2021

 

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