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<br />'~,.>... <br />(f) If the volume of runoff is greater after development than <br />before development, the peak rate of runoff shall be reduced. The <br />critical storm shall be determined by the percent increase in runoff <br />volume. the peak rate of runoff from the critical storm and all more <br />frequent storms, shall be no greater than ninety (90) percent of the <br />peak rate of runoff from the one year storm occurring before any <br />development. Runoff rates from less frequent storms (longer return <br />periods) than the critical storm shall satisfy the requirements in <br />Paragraph (b) of this Section. <br />(g) The critical storm for a specific development area is determined as <br />follows: <br />(1) Determine the total volume of runoff from a twenty-four-hour <br />one year frequency storm, occurring on the development area <br />based on the difference between after development and ninety <br />(90) percent of before any development. <br />(2) From the volumes in Paragraph (c) of this Section, <br />determine the percent of increase in volume of runoff <br />due to development and, using this percentage, select the <br />critical storm from the following table: <br />If the percentage increase in volume of runoff is <br />Equal to or <br />Greater than <br />and The "critical storm" for <br />Less than discharge limitation <br />limitation will be• <br />0 10 1 Year <br />10 20 2 Years <br />20 50 5 Years <br />50 100 10 Years <br />100 250 25 Years <br />250 500 50 Years <br />500 --- 100 Years <br />(h) The requirements shall be satisfied at each location where runoff <br />leaves the development area. The runoff rates and volumes shall be <br />considered for both the conditions before development and after <br />development at each of these locations. <br />(i) To ensure the continued functioning of stormwater control <br />structures, the following information shall be identified to the <br />satisfaction of the City Engineer. <br />(1) The person or entity responsible for continued <br />maintenance of the stormwater control structure <br />and the mechanism establishing responsibility; <br />(2) Maintenance requirements and Schedules; and <br />Page - 20 - <br />~., . <br />ti,~ ~.,._~~.. _ _~ <br />