7. ESD Background Stormwater Management Act of 2007 October 1, 2007 Act Effective May 5, 2009 COMAR revisions effective April 15, 2009 Design Manual Chapter 5 Revised November 11, 2009 Local ordinances due to MDE May 4, 2010 Local ordinances must be adopted
31. ESD Design Philosophy Eliminate stormwater impacts with materials selection Treat stormwater as close to the source as possible – convey AFTER treatment Use small-scale vegetated practices integrated throughout the site Site layout guidelines Locate green spaces down-slope of impervious for treatment Grade site to maintain sheet flow Avoid concentrated flows
60. LEED Sustainable sites 6.1 Quantity Control ESD PRACTICE PEAK VOLUME A-1 Green Roofs Y N A-2 Permeable Pavements Maybe/Enhanced Maybe/Enhanced A-3 Reinforced Turf Maybe/Enhanced Maybe N-1 Disconnection of Rooftop Runoff N N N-2 Disconnection of Non-Rooftop Runoff N N N-3 Sheetflow to Conservation Areas N N M-1 Rainwater Harvesting Maybe/Enhanced Maybe/Enhanced M-2 Submerged Gravel Wetland N N M-3 Landscape Infiltration Maybe/Enhanced Maybe/Enhanced M-4 Infiltration Berms N N M-5 Dry Wells Maybe/Enhanced Maybe/Enhanced M-6 Micro-Bioretention Maybe/Enhanced Maybe/Enhanced M-7 Rain Gardens Maybe/Enhanced Maybe/Enhanced M-8 Swales N N M-9 Enhanced Filters Maybe/Enhanced Maybe/Enhanced