Wisconsin Administrative Code
Department of Natural Resources
NR 800 - Environmental Protection - Water Supply
Chapter NR 811 - Requirements For The Operation And Design Of Community Water Systems
Subchapter III - Source Development - Surface Water
Section NR 811.232 - Intake chemical treatment
Universal Citation: WI Admin Code ยง NR 811.232
Current through August 26, 2024
(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.
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