oEPA Stormwater Phase II Final Rule September 2018 Post-Construction Runoff Control Minimum Control Measure Photo by U.S. EPA This fact sheet profiles the Post-Construction Runoff Control minimum control measure, one of six measures that the operator of a Phase II regulated small municipal separate storm sewer system (MS4) is required to include in its stormwater management program in order to meet the conditions of its National Pollutant Discharge Elimination System (NPDES) permit. This fact sheet outlines the Phase II Final Rule requirements for post-construction runoff control, modified December 9, 2016 and effective on January 9, 2017. It offers some general guidance on how to satisfy those requirements. It is important to keep in mind that the small MS4 operator has a great deal of flexibility in choosing exactly how to satisfy the minimum control measure requirements in its NPDES permit. United States Environmental Protection Agency Office of Water (4203) Factsheet 2.7 ------- |