(A) The applicant shall submit a Storm Water Pollution Prevention Plan (SWP3) consistent with the requirements of the most recent Ohio EPA NPDES General Construction Permit. For specific requirements of an SWP3 the designer shall refer to the NPDES Ohio general construction permit and the Ohio EPA SWP3 Checklist for Construction Activities. The SWP3 must address erosion and sediment control during construction as well as post construction water quality practices. Post- construction practices must meet the requirements of the NPDES Ohio general construction permit and the Summit County Storm Water Management Manual.
(B) The applicant shall submit a Storm Water Management Plan (SWM Plan) which addresses flood control. The design and submittal shall be consistent with the requirements of the most recent Summit County Engineer Storm Water Management Manual, with the following exceptions to the basin design criteria:
(1) Design storm frequency shall be based upon comparison of the volume of runoff from a two-year, 24-hour storm event on pre-development and post-development conditions (critical storm methodology).
(2) If the percentage of increase of runoff volume is less than 20%, the two-year storm will be considered the critical storm. If greater than or equal to 20% and less than 50%, the five-year storm will be considered the critical storm. If greater than or equal to 50% and less than 100%, the ten-year storm will be considered the critical storm. If greater than or equal to 100%, the 25-year storm will be considered the critical storm.
(3) The peak rate of discharge from any storm event having a frequency greater than or equal to the critical storm shall not exceed the peak rate of runoff from a two-year, 24-hour storm under pre- development conditions. For storms of less frequent occurrence than the critical storm, the peak rate of runoff shall not exceed the pre-development peak rate of runoff for the same frequency storm.
(C) The SWP3 and SWM Plan shall be certified by a qualified individual.
(D) The SWP3 shall incorporate measures as recommended by the most current edition of Rainwater and Land Development Manual as published by the Ohio Department of Natural Resources.
(E) Soils erodibility report. The Village Engineer may require the SWP3 to include a Soils Engineering Report based upon his or her determination that the conditions of the soils are unknown or unclear to the extent that additional information is required to protect against erosion. This report shall contain all the information listed below.
(1) Data regarding the nature and erodibility of existing soils.
(2) If applicable, data regarding the nature and erodibility of the soil to be placed on the site.
(3) Conclusions and recommendations for grading procedures.
(4) Conclusions and recommended designs for interim soil-stabilization devices and measures, for permanent soil stabilization after construction is completed.
(Ord. 60, passed 12-5-07)