California Code of Regulations › Title 22 - Social Security › Division 4 - Environmental Health › Chapter 17 - Surface Water Treatment › Article 6 - Reporting › Section 64664 - Monthly Report

Current through Register 2024 Notice Reg. No. 28, July 12, 2024
(a) For
				  each calendar month, a supplier shall submit a report to the State Board by the
				  tenth day of the following month that includes the applicable information in
				  this section for each treatment plant. The report shall be signed by the chief
				  water treatment plant operator, plant superintendent, or other person directly
				  responsible for the operation of the water treatment plant.
(b) The report shall include the following
				  filtration monitoring results, obtained pursuant to section
				  64655, and related information:
Table 64664-A
Combined Filter Effluent Data for Monthly
					 Report
If a supplier
							 uses...
The supplier shall
							 report...
(1) Conventional or direct filtration treatment and
							 serves 10,000 or more persons(a)
The total
							 number of turbidity measurements and either:
(A) The turbidity achieved 50, 90, 95, 98,
							 and 99 percent of the time that the plant was producing water; and the date,
							 time, and value of any turbidity measurements that exceed 1.0 NTU; or
(B) The results of turbidity measurements
							 recorded at intervals no greater than every four hours; all results that exceed
							 0.3 NTU, recorded at intervals no greater than every 15 minutes; and the number
							 and percent of turbidity measurements that are less than or equal to 0.3 NTU,
							 based on measurements recorded at intervals no greater than every 15
							 minutes.
(2) Conventional or direct filtration treatment and
							 serves fewer than 10,000 persons(b), diatomaceous
							 earth filtration, slow sand filtration(c), or an
							 alternative filtration technology
(A) The total number of turbidity
							 measurements;
(B) The results of turbidity
							 measurements;
(C) The number and percent of turbidity
							 measurements taken that are less than or equal to the performance standard
							 specified for each filtration technology in section
							 64653 or as required for an
							 alternative treatment process;
(D) The date, time, and value of any
							 turbidity measurements that exceed performance levels specified in section
							 64653 or as required for an
							 alternative treatment process; and
(E) The average daily turbidity level.
__________________________________________________
(a) A supplier
							 shall review the data reported to ensure that it is not compromised by system
							 or instrument maintenance, hardware or software problems, signal transmission
							 problems, or for other technical reasons.
(b) A supplier
							 monitoring pursuant to footnote (c) of table 64655 may report pursuant to
							 paragraph (1)(A) in lieu of paragraphs (2)(B) through (2)(E).
(c) If the
							 turbidity of the combined filter effluent is greater than 1.0 NTU in five
							 percent or more of the measurements, a supplier shall also report the dates and
							 results of total coliform sampling of the combined filter effluent prior to
							 disinfection to demonstrate compliance with paragraph (4)(A) of table
							 64653.
Table 64664-B
Individual Filter Data for Monthly
					 Report
If a supplier
							 uses...
The supplier shall
							 report...
(1) Conventional or direct filtration treatment and
							 serves 10,000 or more persons
(A) Certification that individual filter
							 turbidity monitoring was conducted pursuant to section
							 64655;
(B) For an exceedance of section
							 64660(b)(7)(A), (b)(7)(B), or
							 (b)(7)(C), a written explanation of the cause
							 of the exceedance;
(C) For an exceedance of section
							 64660(b)(7)(D) or
							 (b)(7)(E), the filter number, turbidity
							 measurements, and date(s) and time(s) of the exceedance(s); and either:
1. The obvious reason for the exceedance;
							 or
2. If the supplier is not able to identify
							 an obvious reason for the abnormal filter performance, the filter profile
							 produced pursuant to table 64660; and
(D) For an exceedance of section
							 64660(b)(7)(F),
							 certification that a self-assessment was conducted pursuant to table
							 64660.
(2) Conventional or direct filtration treatment and
							 serves fewer than 10,000 persons
(A) The information in paragraphs
							 (1)(A) and (1)(B);
(B) For an exceedance of section
							 64660(b)(7)(D) or
							 (b)(7)(E), the filter number, turbidity
							 measurements, date(s) and time(s) of the exceedance(s); and, if known, the
							 obvious reason for the exceedance.
(C) For an exceedance of section
							 64660(b)(7)(F),
							 the date the self-assessment was triggered and completed. If the
							 self-assessment was triggered during the last four days of the month, the
							 supplier may report to the State Board by the 14th
							 of the following month the date the self-assessment was triggered and
							 completed; and
(D) For an exceedance of section
							 64660(b)(7)(G),
							 certification that the CPE is required and the date it was triggered.
(c)
				  The report shall include the following disinfection monitoring results obtained
				  pursuant to section
				  64656:
(1) The date and duration of each instance
				  when the disinfectant residual in water supplied to the distribution system is
				  less than 0.2 mg/L and when the State Board was notified of the
				  occurrence.
(2) The following
				  information on samples taken from the distribution system to comply with
				  section 64654(b)(2):
(A) The number of samples where the
				  disinfectant residual is measured;
(B) The number of samples where only the
				  heterotrophic plate count (HPC) is measured;
(C) The number of measurements with no
				  detectable disinfectant residual and no HPC is measured;
(D) The number of measurements with no
				  detectable disinfectant residual and HPC is greater than 500 colony forming
				  units per milliliter;
(E) The
				  number of measurements where only HPC is measured and is greater than 500
				  colony forming units per milliliter; and
(F) The value of V in the following formula:
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					 here to view image
Where V = the percent of distribution system samples with a
					 detectable residual,
A = the value in paragraph (2)(A) of this
					 subsection,
B = the value in paragraph (2)(B) of this
					 subsection,
C = the value in paragraph (2)(C) of this
					 subsection,
D = the value in paragraph (2)(D) of this subsection,
					 and
E = the value in paragraph (2)(E) of this subsection,
					 and
(3) For each
				  day the lowest measurement of residual disinfectant concentration in mg/L in
				  the water entering the distribution system.