Section R. 299.2912 - Treatment facility classification changesRule 12.
(1) When 1 or more of the conditions described by subrule (2) of this rule exist or are imminent, the department may change the classification of a treatment facility after notice and opportunity for hearing on the proposed action not less than 60 days before the classification change. Hearings conducted by the department pursuant to this subrule shall be undertaken according to hearing procedures prescribed by part 5.(2) The department may change the classification of a treatment facility upon finding that any of the following or any combination has occurred or is expected to occur within 60 days:(a) The population being served by the treatment facility has changed.(b) There has been incorporated within the treatment facility special features of design or characteristics which render the treatment facility more difficult to operate.(c) Certain wastes are being treated within the treatment facility that require special treatment facility design or operation procedures.(d) Conditions of flow or use of the receiving waters require an unusually high degree of treatment facility operational control.Mich. Admin. Code R. 299.2912