Our Construction Stormwater Permits require permittees to prevent water pollution by managing water that may be contaminated from their construction sites.
Learn how to handle your contaminated construction stormwater safely and properly. Find helpful documents, links, and frequently asked questions.
Documents and helpful links
This spreadsheet shows treatment systems that may be effective in treating specific contaminants. Users should evaluate the effectiveness of any treatment system they plan to implement and confirm that the chosen treatment system does not cause or contribute to a violation of the water quality standards.
This database from the U.S. EPA outlines different types of treatment processes. We do not guarantee or endorse any of the listed treatment systems.
The TAPE program provides a peer-reviewed regulatory certification process for emerging stormwater treatment technologies. This database is a collection of assessed treatment technologies.
Our preferred lab methods for stormwater discharge monitoring.
Effluent guidelines are national standards based on the performance of treatment and control technologies for wastewater discharges to surface waters and municipal sewage treatment plants. Your local jurisdiction may have different guidelines, so check with them before discharging from your site.
Definitions from the Washington State legislature regarding dangerous wastes and hazardous substances
Frequently asked questions