(6) Upon evaluation of information provided by individual plants or obtained during inspections by Division staff, the Director may increase or decrease the nominal credit assigned individual plants based on that evaluation.(a) Items which would augment the treatment process and thereby warrant increased credit are:
(i) facilities or means to moderate extreme fluctuations in raw water characteristics;
(ii) sufficient on-site laboratory facilities regularly used to alert operators to changes in raw water quality;
(iii) use of pilot stream facilities which duplicate treatment conditions but allow operators to know results of adjustments much sooner than if only monitoring plant effluent;
(iv) use of additional monitoring methods such as particle size and distribution analysis to achieve greater efficiency in particulate removal;
(v) regular program for preventive maintenance, records of such, and general good housekeeping; or
(vi) adequate staff of well trained and certified plant operators.
(b) Items which would be considered a detriment to the treatment process and thereby warrant decreased credit are:
(i) inadequate staff of trained and certified operators;
(ii) lack of regular maintenance and poor housekeeping; or
(iii) insufficient on-site laboratory facilities.
R309-215-8. Surface Water Treatment Plant Monitoring and Reporting.
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.
R309-215-9. Turbidity Monitoring and Reporting.
Public water systems utilizing surface water and ground water under the direct influence of surface water shall monitor for turbidity in accordance with this section. Small surface water systems serving a population less than 10,000 shall monitor in accordance with subsections (1), (2), (3), (5) and (6). Large surface water systems serving 10,000 or more population shall monitor in accordance with subsections (1), (2), (3), (4) and (6).
(1) Routine Monitoring Requirements for Treatment Facilities utilizing surface water sources or ground water sources under the direct influence of surface water.
