Conditional No Exposure Exemption

Ecology’s Industrial Stormwater General Permit has an exemption for industrial facilities that don’t have industrial materials and activities exposed to stormwater. Facilities with “no exposure” can apply for an exemption from coverage under the permit; this is called a Conditional No Exposure (CNE) exemption.
https://ecology.wa.gov/Regulations-Permits/Guidance-technical-assistance/Stormwater-permittee-guidance-resources/Stormwater-manuals