(a) The WWTP shall be designed to facilitate unit process maintenance such that:
- (1) Each unit of the WWTP can be removed from service independently;
- (2) The design facilitates WWTP operation during unit maintenance and emergency repair so as to minimize deterioration of effluent quality;
- (3) Solids retention, sludge handling, and disinfection are addressed as specified in this chapter; and
- (4) WWTP by-passes that allow raw or insufficiently treated sewage to be discharged directly to a water course are prevented.
- (b) For WWTP upgrade or expansion, the technical specifications prepared per Env-Wq 703.02 shall include a detailed description of how to maintain existing WWTP operations, delineating the suggested construction sequence and number of units to be removed from treatment operation.
- (c) A means of unit isolation and dewatering shall be provided for each process unit.
- (d) Each tank shall be protected against flotation.
Source. (See Revision Note at chapter heading for Env-Wq 700) #8590, eff 3-25-06; ss by #10693, eff 10-15-14; ss by #14258, eff 7-1-25, EXPIRES: 7-1-35