The increased storm water runoff resulting from a proposed development shall be detained on site by the provisions of appropriate detention or retention basins, parking lots, streets, lawns, or other acceptable techniques. Measures which further retard the rate of overland flow and the velocity in runoff channels may also be required to partially control the runoff rate.

Detention basins shall be sized to store excess flows from storms with a 100-year return period. Control devices shall limit the discharge to a rate no greater than that prescribed by this chapter (see JCC 16.10.360 and 16.10.370). [Ord. 12-1-97C § 15(A).]