Sites that have been previously developed where no post-construction SCMs were installed shall either ensure a twenty percent (20%) net reduction of the site impervious area, provide for treatment of at least twenty percent (20%) of the WQv, or a combination of the two. A one-for-one credit towards the twenty percent (20%) net reduction of impervious area can be obtained through the use of pervious pavement and/or green roofs. Where projects are a combination of new development and redevelopment, the total WQv that must be treated shall be calculated by a weighted average based on acreage, with new development at one hundred percent (100%) and redevelopment at twenty percent (20%) WQv.
(Ord. 2017-19. Passed 10-10-17.)