To control postconstruction stormwater impacts from regulated earth disturbance activities, State Water Quality Requirements can be met by BMPs, including site design, which provide for replication of preconstruction stormwater infiltration and runoff condition, so that postconstruction stormwater discharges do not degrade the physical, chemical or biological characteristics of the receiving waters. This may be achieved by the following:
(1) Infiltration: replication of preconstruction stormwater infiltration conditions;
(2) Treatment: use of water quality treatment BMPs to ensure filtering out of the chemical and physical pollutants from the stormwater runoff; and
(3) Streambank and streambed protection: management of volume and rate of postconstruction stormwater discharges to prevent physical degradation of receiving waters (e.g., from scouring).