| |colspan="2"|Length of Time for Draining after Storm Event (>25mm)||max. 72 hr.||   || max. 72 hr., 48 hr. recommended||   ||    ||     ||    || | |colspan="2"|Length of Time for Draining after Storm Event (>25mm)||max. 72 hr.||   || max. 72 hr., 48 hr. recommended||   ||    ||     ||    || |