What is the authorized CSO Plan that is authorized by the EPA and EPD?
The City submitted a plan to EPA and EPD in April 2001 describing how the CSO problem would be solved. That plan was authorized by EPA and EPD in July 2001. The specific elements of the plan are: • Separate a minimum of 27% of the combined sewer system. Meeting this minimum will increase the City’s total separated area from 85% to almost 90%. The areas to be separated will be chosen based on water quality benefits and how cost-effectively they can be implemented. • Construct a deep-rock tunnel storage and treatment system to capture and store 85% of the combined storm water and sewage flow for conveyance to two new CSO treatment facilities for advanced treatment (a much higher level than the current CSO treatment facilities provide) before discharge to the Chattahoochee or South Rivers. The number of overflows will be reduced from 60-80 per year to an average of only 4 per year at the 7 existing CSO treatment facilities. These remaining overflows will be screened, disinfected and dechl
