The Storm Water Phase I Rule (55 FR 47990; November 16, 1990), administered by the Georgia Environmental Protection Division (EPD), requires all operators of medium and large Municipal Separate Storm Sewer Systems (MS4s) to obtain a NPDES permit, and develop a stormwater management program (SWMP). The permit expires five years after issuance, but is renewable. The program should be designed to prevent harmful pollutants from being washed by stormwater runoff into the MS4 (or from being dumped directly into the MS4), then discharged from the MS4 into local water bodies.
DeKalb County has developed a draft SWMP, submitted to GA EPD for review in December of 2003, that covers the duration of the permit – June 2004 to June 2009. The SWMP reflects the wide range of stormwater management activities performed by multiple departments, and divisions within these departments.
Federal standards dictate that the SWMP must meet the standard of "reducing pollutants to the Maximum Extent Practicable (MEP).” However, EPA did not define MEP, thereby allowing flexibility in the development of site-specific permit conditions based on internal knowledge of the jurisdiction. DeKalb County’s Draft SWMP addresses the following topics:
- Structural and Source Control Measures, address the different activities that physically affect the quantity and quality of the stormwater entering the County stormwater conveyance system.
- Illicit Discharge Detection and Elimination Program, is a proactive program to identify intentional and unintentional illicit discharges into the County stormwater system. While complete elimination of illicit discharges is unrealistic, this program strives to minimize their occurrence in the County. If you suspect an illicit discharge into the County stormwater system, immediately contact the Department of Watershed Management at (770) 621-7200.
- Industrial Facility Stormwater Runoff Control Program,describes the County’s efforts to inventory and inspect industrial facilities for compliance with stormwater regulations.
- Construction Site Management Program, describes the County’s erosion and sedimentation control ordinance and site plan review process.
- SWMP Activities in 303(d) Listed Areas, describes those stream segments only partially supporting or not supporting their designated uses in 2002 and the County’s watershed improvement efforts in these priority TMDL streams.
- Public Education Program, includes the various community outreach activities associated with the development and implementation of the South River Watershed Assessment and Management Plan and the DeKalb County Stormwater Utility Program.
- Municipal Stormwater Facilities, describes the roles of the seven municipalities that are co-permittees with DeKalb County.
- SWMP Administration, describes the proposed budgets and financial plans of the stormwater program associated with the new stormwater utility enterprise.