Stormwater systems shall be designed to control and treat the runoff generated from all surfaces by one inch of rainfall. The treatment volume shall be drawn down pursuant to standards specific to each practice as provided in the Design Manual. To ensure that the integrity and nutrient processing functions of receiving waters and associated riparian buffers are not compromised by erosive flows, stormwater flows from the development shall not contribute to degradation of waters of the state. At a minimum, the development shall not result in a net increase in peak flow leaving the site from pre-development conditions for the ten-year, 24-hour storm event.
(Ord. passed 6-12-12)