R 325.11008 Complete treatment system; design and operation requirements.

Rule 1008. (1) A minimum of 2 units shall be provided for each treatment process for coagulation, sedimentation, and filtration. (2) A sufficient primary coagulant dose shall be added to create a settleable or filterable floc at all times that a conventional filtration or direct filtration plant is in operation. (3) Essential chemical systems for the application of disinfectants, primary coagulants, and other chemicals, as required by the department, shall be equipped to provide service at the maximum allowable treatment rate with the largest unit removed from service. (4) Equipment provided for disinfection required under subrule (3) of this rule shall be capable of treatment at the rated treatment capacity with the largest unit removed from service. (5) Application points for disinfection shall be provided, or be available, at all of the following locations: (a) Before coagulation. (b) Immediately preceding filtration. (c) Immediately following filtration. (d) Immediately before entry of finished water into the distribution system. (6) Each unit or element of a complete treatment system shall be provided with a means to remove it from service without interrupting the treatment process. However, a complete bypass of the coagulation, sedimentation, or filtration processes is prohibited. (7) Each unit or element of a complete treatment system shall be provided with a means to drain and with overflow control sufficient to prevent flooding of the facility. (8) Common walls between finished water and water of lesser quality are prohibited. (9) Each complete treatment system shall be provided with a means to measure the volume and rate of raw water supplied and finished water produced. (10) A complete treatment system shall be protected from the highest recorded flood elevation or the 100-year flood elevation, whichever is greater. (11) Components of a complete treatment system which are essential for the protection of the public health and which are required for the production of drinking water on a continuous basis shall be protected from flooding.