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Minimum Requirement#5 —On-Site Stormwater Management <br /> On-site Stormwater Management BMPs is required for lawn and landscaped <br /> areas and hard surfaces. This project is not flow control exempt. As such, the <br /> following BMPs in List#1 will apply to the project: <br /> • The project will need to meet Category 3 —Other Hard Surfaces. BMP <br /> T5.11 Concentrated flow dispersion. The new drainage for playground the <br /> surfacing will collected through a pervious concrete/drainage <br /> aggregate/sand filter system. Water will infiltrate and if needed, collected <br /> in a perimeter drainpipe. The perimeter drainpipe will be comiected to an <br /> existing 4-inch outfall pipe. The existing outlet will be inspected and <br /> upgraded with 3-4-inch riprap to dissipate the energy of any water <br /> discharge from the drainpipe. <br />