Measure 5: Post-Construction Runoff Controls

The post-construction runoff control program applies to new developments that disturb an acre or more of land, including projects less than an acre that are part of a larger common plan of development or sale. The post-construction runoff control program is designed to control stormwater runoff from new development sites and to ensure long term operation and maintenance of BMPs.

In your Phase II stormwater permit, you will find a table under Post-Construction Runoff Controls. All individual permits include the first three BMPs, (a) through (c). One or both of the last two BMPs may be included in your permit as appropriate. Click on the links to find specific guidance for each of the BMPs.

BMP	Measurable Goals
(a) Establish a Post-Construction Stormwater Management Program	Develop, adopt by ordinance (or similar regulatory mechanism), implement, and enforce a program to address stormwater runoff from new development and redevelopment. The ordinance must be reviewed and approved by the Director prior to implementation. Ensure that controls are in place to prevent or minimize water quality impacts.
(b) Establish strategies that include BMPs appropriate for the MS4	Develop and implement strategies that include a combination of structural and/or non-structural BMPs. Ensure adequate long-term operation and maintenance of structural BMPs. Require annual inspection reports of permitted structural BMPs performed by a qualified professional.
(c) Establish a program to control the sources of fecal coliform to the maximum extent practicable	Control the sources of fecal coliform to the maximum extent practicable. Develop and implement an oversight program to ensure proper operation and maintenance of on-site wastewater treatment systems for domestic wastewater. Municipalities must coordinate this program with the county health department.
Establish trout waters (Tr) protection measures (for programs with development or redevelopment draining to Tr waters)	Develop, adopt and implement an ordinance (or similar regulatory mechanism) to sure that the best management practices selected do not result in a sustained increase in water quality temperature.
Establish nutrient sensitive waters (NSW) protection measures (for programs with development or redevelopment draining to NSW waters)	Develop, adopt and implement an ordinance (or similar regulatory mechanism) to ensure that the best management practice for reducing nutrient loading is selected. In areas where the Environmental Management Commission has approved a Nutrient Sensitive Waters Urban Stormwater Management Program, the provisions of that program fulfill the nutrient loading reduction requirement. Develop and include a nutrient application (fertilizer and organic nutrients) management program in the Post-construction Stormwater Management Program.

Note: You can view a copy of your own local government's stormwater permit on the NC Division of Water Quality Stormwater Unit web site.

You can also download post-construction stormwater training slides here.