Changes to the Washington ISGP: Are You in Compliance?
The new Industrial Stormwater General Permit (ISGP) for the state of Washington went into effect on January 1, 2020 and contains many changes from the 2015 permit that affect both current permittees and businesses that were previously not covered by the permit. Major changes include: When applying for coverage, applicants must identify their industrial category using North American Industry Classification