COR900000 - Industrial Stormwater General Permit for Non-Extractive Industries

Beginning in 2021 and continuing through 2022, the division led a stakeholder engagement process to gain feedback about potential changes to include in the COR900000 permit renewal. Following stakeholder feedback, the division released a draft COR900000 permit on March 10, 2022, with a public comment period, responsive comment period, and rebuttal comment period that ended August 5, 2022. The division has considered comments received during the comment period and issued the final permit on April 28, 2023. Here is a list of important changes to the new permit:

Here are some important things to know about the reissued permit:

• The reissued permit is not effective until July 1, 2024. In the meantime, the previous permit issued in 2012 remains in effect.

• Existing COR900000 permittees do not need to reapply at this time. The division will use information from applications previously sent to develop certifications under the new permit. If division permit writers need additional information they will contact permittees directly.

• The division held a stakeholder meeting on May 22, 2023 to inform on the new permit. You can view meeting materials to learn more.

"No Exposure" is an alternative to obtaining coverage under the COR900000 permit. In this context, "No Exposure" means that storm-resistant sheltering is in place to prevent exposure to rain, snow, snowmelt, and/or runoff. To be eligible for this exclusion, you must apply for and obtain division approval through the issuance of a certification. Part G of the application contains a self-certifying checklist for you to assess whether your facility meets conditions of "No Exposure."