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Management Plan including a written document containing signatures of all parties as proof <br />of acknowledgment that they have reviewed and understand the requirements and <br />responsibilities of the Comprehensive Storm Water Management Plan. <br />13. Existing and proposed drainage patterns: The location and description of existing and <br />proposed drainage patterns and storm water management practices, including any related <br />storm water management practices beyond the development area and the larger common <br />development area. <br />14. For each storm water mana eg men~ractice to be employed on the development area, include <br />the following: <br />a. Location and size, including detail drawings, maintenance requirements during <br />and after construction, and design calculations, all where applicable. <br />b. Final site conditions including storm water inlets and permanent nonstructural and <br />structural storm water management practices. Details of storm water management <br />practices shall be drawn to scale and shall show volumes and sizes of contributing <br />drainage areas. <br />c. Any other structural and/or non-structural storm water management practices <br />necessary to meet the design criteria in this regulation and any supplemental <br />information requested by the Mayfield Village Engineer. <br />1128.09 PERFORMANCE S'T'ANDARDS <br />A. General: The storm water system, including storm water management practices for storage, <br />treatment and control, and conveyance facilities, shall be designed to prevent structure flooding <br />during the 100-year, 24-hour storm event; to maintain predevelopment runoff patterns, flows, and <br />volumes; and to meet the following criteria: <br />Inte rag_ ted practices that address degradation of water resources. The storm water <br />management practices shall function as an integrated system that controls flooding and <br />minimizes the degradation of the physical, biological, and chemical integrity of the water <br />resources receiving storm water discharges from the site. Acceptable practices shall: <br />a. Not disturb riparian areas, unless the disturbance is intended to support a <br />watercourse restoration project and complies with Section 1129 Mayfield <br />Village's Erosion and Sediment Control Requirements, all as determined by the <br />Mayfield Village Engineer. <br />b. Maintain predevelopment hydrology and groundwater recharge on as much of the <br />site as practicable. <br />c. Only install new impervious surfaces and compact soils where necessary to <br />support the future land use. <br />d. Compensate for increased runoff volumes caused by new impervious surfaces and <br />soil compaction by reducing storm water peak flows to less than predevelopment <br />levels. <br />