New and redevelopment practices capture and treat stormwater runoff through various physical and biological processes. Examples include wet ponds, bioretention, green roofs, and green streets.  Practices are installed on new development sites to hold pollution levels at pre-development conditions. Alternatively, they can be used at redevelopment sites to reduce pollutant loads below pre-development levels.  The Chesapeake Stormwater Network provides a variety of resources on practices for new and redevelopment projects. These resources explain how much credit practices receive under each of the Bay jurisdictions’ stormwater regulations (toward meeting the Bay TMDL). Resources include the Chesapeake Bay Program Approved Expert Panel Report on Stormwater Performance Standards, a webcast, a fact sheet, and a FAQ for Stormwater Performance Standards and Retrofit Expert Panel Reports.