§ 53.41 DEVELOPMENT STANDARDS FOR PROJECTS.
(B) High-density projects shall implement storm water control measures that comply with each of the following standards.
(1) Storm water volume. The measures shall control and treat the difference in storm water runoff volume leaving the project site between the pre- and post-development conditions for, at a minimum, the one-year, 24-hour storm. Runoff volume drawdown time shall be a minimum of 24 hours, but not more than 120 hours.