R 325.10611c Filtration and disinfection; filter backwash recycling; treatment technique.

Rule 611c. A subpart H system that employs conventional filtration or direct filtration treatment and that recycles spent filter backwash water, thickener supernatant, or liquids from dewatering processes shall return these flows through the processes of a system's existing conventional or direct filtration system as defined in R 325.10103 and R 325.10104, or at an alternate location approved by the department. If capital improvements are required to modify the recycle location to meet this requirement, then all capital improvements shall be completed not later than June 8, 2006.