Current through Bulletin 2024-06, March 15, 2024
Treatment plant management shall report the following to the
Division within ten days after the end of each month that the system serves
water to the public, except as otherwise noted:
(1) For each day;
(a) if the plant treats water from multiple
sources, the sources being utilized (including recycled backwash water) and the
ratio for each if blending occurs.
(b) the total volume of water treated by the
plant,
(c) the turbidity of the raw
water entering the plant,
(d) the
pH of the effluent water, measured at or near the monitoring point for
disinfectant residual,
(e) the
temperature of the effluent water, measured at or near the monitoring point for
disinfectant residual,
(f) the type
and amount of chemicals used in the treatment process (clearly indicating the
weight and active percent of chemical if dry feeders are used, or the percent
solution and volume fed if liquid feeders are used),
(g) the high and low temperature and weather
conditions (local forecast information may be used, but any precipitation in
the watershed should be further described as light, moderate, heavy, or
extremely heavy), and
(h) the
results of any "jar tests" conducted that day
(2) For each filter, each day;
(a) the rate of water applied to each
(gpm/sq.ft.),
(b) the head loss
across each (feet of water or psi),
(c) length of backwash (if conducted; in
minutes), and
(d) hours of
operation since last backwashed.
(3) Annually; certify in writing as required
by
R309-105-14(1)
that when a product containing acrylamide and/or epichlorohydrin is used, the
combination of the amount of residual monomer in the polymer and the dosage
rate does not exceed the levels specified as follows:
(a) Acrylamide: 0.05%, when dosed at 1 part
per million, and
(b)
Epichlorohydrin: 0.01%, when dosed at 20 parts per million.
Certification may rely on manufacturers data.
(4) Additional
record-keeping for plants that recycle.
The system must collect and retain on file recycle flow
information for review and evaluation by the Director beginning June 8, 2004 or
upon approval for recycling. As a minimum the following shall be
maintained:
(a) Copy of the recycle
notification and information submitted to the Division under
R309-215-7(3).
(b) List of all recycle flows and the
frequency with which they are returned.
(c) Average and maximum backwash flow rates
through the filters and the average and maximum duration of the filter backwash
process in minutes.
(d) Typical
filter run length and a written summary of how filter run length is
determined.
(e) The type of
treatment provided for the recycle flow.
(f) Data on the physical dimensions of the
equalization and/or treatment units, typical and maximum hydraulic loading
rates, type of treatment chemicals used, average dose, frequency of use and
frequency at which solids are removed, if applicable.
