Section NR 811.232 - Intake chemical treatment(1) If the department determines that chemical treatment is warranted for taste and odor control or the control of zebra and other mussels and other nuisance organisms in an intake structure, all of the following requirements shall be met: (a) Chemical treatment shall be installed in accordance with subch. VI and plans and specifications shall be approved by the department prior to installation.(b) Solution piping and diffusers shall be installed within the intake pipe or in a suitable carrier pipe. Provisions shall be made to prevent dispersal of chemicals into the water environment outside the intake. Diffusers shall be located and designed to protect all intake structure components.(c) A spare solution line shall be installed to provide redundancy and to facilitate the use of alternate chemicals.(d) Chemical feeders shall be interlocked with the plant system controls to shut down the chemical feed pump automatically when the raw water flow stops.(e) A sample line out to the intake shall be provided which will allow for collecting raw water samples unless the chemical control system will be shut off for periods sufficient to collect raw water samples at the shore well.(2) The department may require pilot testing or demonstration studies of alternate intake treatment. Studies shall satisfy the requirements under s. NR 811.44.Wis. Admin. Code Department of Natural Resources NR 811.232
CR 09-073: cr. Register November 2010 No. 659, eff. 12-1-10; renumbering of (1) to (4) made under s. 13.92(4) (b) 1, Stats., Register November 2010 No. 659.Amended by, CR 22-074: renum. (intro.), (1), (2), (3) to (1) (intro.), (a), (b), (c) and am. (1) (intro.), (c), cr. (1) (d), (2), renum. (4) to (1) (e) Register January 2024 No. 817, eff. 2/1/2024