Permit Application Requirements for Medium and Large MS4s
Medium and large MS4s were subject to the permit application requirements found at 40 CFR 122.26(d) [PDF - 28 KB - 11 pp]. Using the information submitted in the permit application, the NPDES permitting authority would then develop appropriate permit requirements.
The permit application consisted of two parts that provided the NPDES permitting authority with comprehensive information to use in developing permit requirements. Information required in the application included a physical description of the MS4, legal authority of the MS4 operator, a characterization of the surrounding sources and the pollutants found in the stormwater discharge, and a description of fiscal resources.
The most significant portion of the application was the development of a proposed stormwater management program that would meet the standard of "reducing pollutants to the Maximum Extent Practicable (MEP)." Stormwater management programs for medium and large MS4s include measures to:
- Identify major outfalls and pollutant loadings;
- Detect and eliminate non-stormwater discharges to the system;
- Reduce pollutants in runoff from industrial, commercial, and residential areas; and
- Control stormwater discharges from new development and redevelopment areas.
More information on the permit application requirements and stormwater management programs for medium and large MS4s can be found from the following links:
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