Section R. 323.2305 - Pretreatment program applicabilityRule 5.
(1) A state permit or national pollutant discharge elimination system permit issued to a publicly owned treatment works shall contain requirements for pretreatment program development and implementation when the department determines that it is necessary to control the introduction of pollutants into the publicly owned treatment works from nondomestic users.(2) A publicly owned treatment works shall develop and implement its pretreatment program according to the following criteria if required by order of the department or by its permit: (a) A publicly owned treatment works which has a total design flow of more than 5 million gallons per day and which receives, from nondomestic users, pollutants that may pass-through or interfere with the operation of the publicly owned treatment works or are otherwise subject to categorical pretreatment standards is subject to the federal industrial pretreatment program as set forth in R 323.2306.(b) A publicly owned treatment works which has a total design flow of 5 million gallons per day or less and which receives from nondomestic users, pollutants that may pass-through or interfere with the operation of the publicly owned treatment works or are otherwise subject to categorical pretreatment standards is subject to the Michigan industrial pretreatment program, unless the department requires a federal industrial pretreatment program, as set forth in R 323.2306.(c) A publicly owned treatment works which has a state permit issued under the act to discharge to the groundwater and which has nondomestic users that may cause interference with the publicly owned treatment works or permit violations or has nondomestic users that are otherwise subject to categorical pretreatment standards is subject to the Michigan industrial pretreatment program as set forth in R 323.2306.(3) A publicly owned treatment works that is required by order of the department or discharge permit to develop an industrial pretreatment program shall submit an approvable program not later than 1 year after written notification.Mich. Admin. Code R. 323.2305