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Ordinance No. 99-130 Page 5 (g) The critical storm for a specific development area is determined as follows: (1) Deternune the total volume of runoff from a twenty-four-hour one year frequency storm, occurring on the development area based on the difference between after development and ninety percent (90%) of before any development. (2) From the volumes in Paragraph (c) of this Section, determine the percent of increase in volume of runoff due to development and, using this percentage, select the critical storm from the following table: If the percentage increase in volume of runoff is: Equal to or The "critical storm" for greater than and less than discharge limitation will be: 0 10 1 10 20 2 20 50 5 50 100 10 100 254 25 250 500 50 500 --- 100 (h) The minimum storage volume for the stormwater retention system shall be calculated following the requirements of subsections (a) through (g) above. However, in no case shall the required storage volume be less than the total proposed hardsurface area of the site times two inches (2"). Hard surface areas shall include roof areas, concrete areas, asphalt areas, brick areas, stone paver areas, and other similar areas as determined by the City Engineer. (i) The requirements shall be satisfied at each location where runoff leaves the development area. The runoff rates and volumes shall be considered for both the conditions before development and after development at each of these locations. (c) To ensure the continued functioning of stormwater control structures, the following information shall be identified to the satisfaction of the City Engineer: (1) The person or entity responsible for continued maintenance of the stormwater control structure and the mechanism establishing responsibility; (2) Maintenance requirements and Schedules; and (3) Permanent access and access easements required to perform inspection and maintenance of stormwater control structures and stormwater conveyance systems if easements are required by the City. The minimum size of an easement shall be approved by the City Engineer." SECTION 2: That any Ordinance, or part of any Ordinance, which is inconsistent with or in conflict with this Ordinance, shall, to the extent of any such inconsistency or conflict, be, and hereby is, repealed.