(A) The volume of storage required will be based on the difference between the required release rate as determined in § 55.56 and the 25-year fully developed conditions. The acreage used for detention require-ments will be taken as the developed property acres. The chart included in the § 55.70 has been provided to aid in the necessary calculations. This form must be attached with all required calculations for site plan approval.
(B) During any storm event, the detention pond will be required to store a minimum of 20% of the total required for a period of 12 hours. The engineer will provide calculations by an acceptable method to demonstrate to the Director of Public Services that the pond is designed to store water for the 12-hour period. The percentage of total storage may be increased or decreased at the discretion of the Director.
(Ord. 420-4-97, passed 4-21-97)