(A) The drainage system should be designed to minimize adverse surface and groundwater quality impacts off-site and on the property itself. Detention basins shall incorporate design features to capture storm water runoff pollutants. When designers propose wet bottom and wetland type designs, all flows from the development shall be routed through the basin (i.e. low flows shall not be bypassed). When it is not practical or feasible to route all of the project’s flow to the detention basin, the design of the basin shall compensate for the bypass flow. In cases where detention facilities are practical and the long term maintenance of such facilities are provided for, detention of storm water shall be promoted through the property’s drainage system to reduce the volume of storm water runoff and to reduce the quantity of runoff pollutants.
(B) The drainage system should incorporate multiple uses where practicable. Uses considered compatible with storm water management include open space, aesthetics, aquatic habitat, recreation (boating, fishing, trails, playing fields), wetlands and water quality mitigation.
(C) Water quality shall adhere to:
(1) Illinois Environmental Protection Act: 415 ILCS 5/11 and 5/12, from Ch. 111-1/2, par 1011 and 1012;
(2) Illinois Pollution Control Board Rules and Regulation: Title 35: Environmental Protection, Subtitle C: Water Pollution, Chapter I: Pollution Control Board, Part 302 Water Quality Standards; and
(3) Illinois Pollution Control Board Rules and Regulations: Title 35: Environmental Protection, Subtitle C: Water Pollution, Chapter I: Pollution Control Board, Part 304 Effluent Standard.
(Ord. passed 9-8-2009)