§ 64664. Monthly Report.

(a) For each calendar month, a supplier shall submit a report to the Department 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	The total number of turbidity measurements and either:
direct filtration treatment	(A) The turbidity achieved 50, 90, 95, 98, and 99 percent
and serves 10,000 or	of the time that the plant was producing water; and the
more persons(a)	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	(A) The total number of turbidity measurements;
direct filtration treatment	(B) The results of turbidity measurements;
and serves fewer than	(C) The number and percent of turbidity measurements
10,000 persons(b),	taken that are less than or equal to the performance
diatomaceous earth	standard specified for each filtration technology in section
filtration, slow sand	64653 or as required for an alternative treatment process;
filtration(c), or an	(D) The date, time, and value of any turbidity
alternative filtration	measurements that exceed performance levels specified in
technology	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 include...
(1) Conventional or	(A) Certification that individual filter turbidity monitoring
direct filtration treatment	was conducted pursuant to section 64655;
and serves 10,000 or	(B) For an exceedance of section 64660(b)(7)(A),
more persons	(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	(A) The information in paragraphs (1)(A) and (1)(B);
direct filtration treatment	(B) For an exceedance of section 64660(b)(7)(D) or
and serves fewer than	(b)(7)(E), the filter number, turbidity measurements,
10,000 persons	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 Department 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 Department 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).

HISTORY

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).

Note

Note: Authority cited: Sections 116350, 116375, 131052 and 131200, Health and Safety Code. Reference: Sections 116350 and 116375, Health and Safety Code.