Sites that have been previously developed where no post-construction BMPs were installed shall either ensure a 20% net reduction of the site impervious area, provide for treatment of at least 20% of the WQv
, or a combination of the two. A one-for-one credit towards the 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 WQ
v
that must be treated shall be calculated by a weighted average based on acreage, with new development at 100% and redevelopment at 20% WQ
v
.
(Ord. 102-10, passed 8-23-2010)