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EXHIBIT A: EXISTING CHAPTER 927 Storm Water Management and Urban 66G Sediment Pollution Abatement Svstems 927.05 (c) Erosion and sediment control practices used to satisfy the standards shall meet the specifications in the current edition of Water Management and Sediment Control for Urbanizing Areas (Soil Conservation Service, Ohio). The minimum standards are listed below: (1) Timing of sediment trapping practices. Sediment control practices shall be functional throughout earth disturbing activity. Settling facilities, perimeter controls, and other practices intended to trap sediment shall be implemented as the first step of grading and within seven days from the start of grubbing. They shall continue to function until the upslope development area is restabilized. (2) Stabilization of denuded areas. Denuded areas shall have soil stabilization applied within seven days if they are to remain dormant for more than thirty (30) days. Permanent or temporary soil stabilization shall be applied to denuded areas within seven days after final grade is reached on any portion of the site, and shall also be applied within seven days to denuded areas which may not be at final grade, but will remain dormant (undisturbed) for longer than thirty (30) days. Permanent or temporary soil stabilization shall be applied to denuded areas within fifty (50) feet of a stream within two (2) days of reaching final grade or within two (2) days of the most recent disturbance if the area will remain idle for seven (7) days or more. (3) Sediment Settling Ponds: A sediment settling pond is required for any one of the following conditions: concentrated storm water runoff (e.g. storm sewer or ditch); runoff from drainage areas, which exceed the design capacity of silt fence or other sediment barriers; runoff from drainage areas that exceed the design capacity of inlet protection; or runoff from common drainage locations with ten or more acres of disturbed land. Alternative controls can be used if the owner can show, in writing, that the Ohio EPA approved the use of alternatives that the owner demonstrated to be equivalent in effectiveness to a sediment settling pond. (A) Where storm sewer drainage areas include ten or more acres disturbed at one time, a temporary (or permanent) sediment settling pond must be provided until final stabilization of the site. In single- family residential construction, final stabilization is after the houses are built and permanent landscaping is done. It is recommended that for drainage locations of less than ten acres, smaller sediment settling basins and/or sediment traps be used. (B) Each facility's storage capacity shall be no less than 1800 cubic feet of dewatering zone area per acre of total drainage area and 1000 cubic feet of sediment storage zone area per disturbed acre within the watershed of the basin. (C) Permanent storm water management ponds that are designed to trap sediment during construction shall be designed to provide for a slow release of sediment -laden water. The draw down time must be at least 48 hours, or meet the criteria in the Ohio Rainwater and Land Development manual, whichever is most stringent. (D) The design configuration between inlet(s) and the outlet of settling ponds must provide at least two units o length for each one unit of width (❑ 2:1 length to width ratio); a length to width radio of 4:1 is recommended. 927.05 STREETS UTILITIES AND PUBLIC SERVICES CODE 6611