image showing staff reviewing site phasing
Staff reviewing construction phasing

MS4 site plan review procedures

The Municipal Separate Storm Sewer System (MS4) permit requires the permittee to conduct site plan reviews. Permittees must perform and document site plan reviews for construction projects that disturb one acre or more of land. The site plan review ensures active and post-construction requirements of a permittee's regulatory mechanism (e.g. code, ordinance, law) are met. The MS4 Permit requires the regulatory mechanism to be as stringent as the MNR100001/Construction Stormwater Permit.