Cal. Code Regs. tit. 22 § 64664

Current through Register 2024 Notice Reg. No. 45, November 8, 2024

Section 64664 - Monthly Report

(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 14^th 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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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.

(d) The report shall include the following raw, settled, and recycled filter backwash monitoring results obtained pursuant to section 64654.8:

(1) All raw water turbidity measurements taken during the month. If more than one sample is taken each day, the highest value of all samples taken that day may be reported in lieu of reporting all that day's values;

(2) All raw water coliform measurements taken during the month;

(3) Daily settled water turbidity for each day of the month. If more than one sample is taken each day, the highest value of all samples taken that day may be reported in lieu of reporting all that day's values; and

(4) Daily recycled water turbidity and flow for each day of the month that backwash water was recycled back into the treatment process. If more than one turbidity sample (or flow measurement) is taken each day, the highest value of all turbidity samples (or flow measurements) taken that day may be reported in lieu of reporting all that day's values.

(e) The report shall include a written explanation of the cause of any violation of performance standards specified in section 64653 or 64654 and operating criteria specified in section 64660(b)(9).

(f) The report shall include a summary of water quality complaints and reports of gastrointestinal illness received from consumers.

(g) The report shall include the monthly reporting specified in section 64650(f)(1).

Cal. Code Regs. Tit. 22, § 64664

1. New section filed 5-6-91; operative 6-5-91 (Register 91, No. 25).
2. Amendment of subsection (c)(2)(F), new subsections (d)-(d)(4), subsection relettering, amendment of newly designated subsection (e), new subsection (g) and amendment of NOTE filed 12-13-2007; operative 1-12-2008 (Register 2007, No. 50).
3. Amendment of section and NOTE filed 5-22-2013; operative 7-1-2013 (Register 2013, No. 21).
4. Change without regulatory effect amending subsections (a), (b)(2)(C) and (c)(1) and amending NOTE filed 6-2-2015 pursuant to section 100, title 1, California Code of Regulations (Register 2015, No. 23).

Note: Authority cited: Sections 116271, 116350 and 116375, Health and Safety Code. Reference: Sections 116350 and 116375, Health and Safety Code.

1. New section filed 5-6-91; operative 6-5-91 (Register 91, No. 25).
2. Amendment of subsection (c)(2)(F), new subsections (d)-(d)(4), subsection relettering, amendment of newly designated subsection (e), new subsection (g) and amendment of Note filed 12-13-2007; operative 1-12-2008 (Register 2007, No. 50).
3. Amendment of section and Note filed 5-22-2013; operative 7-1-2013 (Register 2013, No. 21).
4. Change without regulatory effect amending subsections (a), (b)(2)(C) and (c)(1) and amending Note filed 6-2-2015 pursuant to section 100, title 1, California Code of Regulations (Register 2015, No. 23).