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  Manual, Combined Sewer Overflow Control (EPA/625/R-93/007) September 1993

This manual presents technical guidance for selecting and designing controls for discharges from combined sewer overflows (CSOs). It will assist municipalities and regional sewer authorities who are required to provide adequate control of overflows from combined sewer systems.

The manual concentrates primarily on the six CSO control technologies that are applied most often:

  • In-system controls, in-line storage
  • Off-line near-surface storage, sedimentation
  • Deep tunnel storage
  • Coarse screening
  • Swirl/vortex technologies
  • Disinfection

The manual also addresses CSO control process selection by discussing various performance goals that can be set for CSO controls, data requirements for the design of CSO controls, and factors that influence control technology selection. The manual concludes with a presentation of costs for various CSO controls.

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