Zooming in on Particles

Zooming in on Particles

Facilities conducting industrial activities under certain Standard Industrial Classifications (SICs) are required to obtain National Pollutant Discharge Elimination System (NPDES) permits to discharge stormwater. In the Pacific Northwest, these Industrial operations obtain permit coverage either under the Washington State Department of Ecology (Ecology) Industrial Stormwater General Permit (ISGP), or the Oregon Department of Environmental Quality … Read more