Cal. Code Regs. tit. 22 § 64663

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

Section 64663 - State Board Notification

A supplier shall notify the State Board as soon as possible, but no later than by the end of the next business day, or within 24 hours, whichever is less, by telephone or other equally rapid means whenever:

(a) A combined filter effluent turbidity exceedance occurs pursuant to table 64663:

Table 64663

Combined Filter Effluent Turbidity Exceedances Requiring State Board Notification

If a supplier uses...	And the turbidity of the combined filter effluent monitored and recorded pursuant to section 64655...
(1) Any filtration technology pursuant to section 64653	Exceeds 5.0 NTU at any time.
(2) Conventional or direct filtration treatment and serves 10,000 or more persons	(A) Exceeds 1 NTU for more than one continuous hour;
	(B) Exceeds 1 NTU at four-hour intervals; or
	(C) Exceeds 1.0 NTU for more than eight consecutive hours.
(3) Conventional or direct filtration treatment and serves fewer than 10,000 persons	(A) For a supplier using a grab sample monitoring program:
	1. Exceeds 1 NTU; or
	2. Exceeds 1.0 NTU in more than two consecutive samples taken every four hours; and
	(B) For a supplier using a continuous monitoring program:
	1. If recording results at least once every 15 minutes, equals paragraph (2)(A); or
	2. Equals paragraph (2)(B) or (2)(C).
(4) Diatomaceous earth or slow sand filtration	Exceeds 1.0 NTU in more than two consecutive samples taken every four hours.
(5) An alternative filtration technology pursuant to section 64653	Exceeds the maximum performance standard established pursuant to sections 64653(e), (f), (g), and (h).

(b) There is a failure to maintain a minimum disinfectant residual of 0.2 mg/L in the water being delivered to the distribution system. The supplier shall report whether or not the disinfectant residual was restored to at least 0.2 mg/L within four hours.

(c) An event occurs which may affect the ability of the treatment plant to produce a safe, potable water including but not limited to spills of hazardous materials in the watershed and unit treatment process failures.

(d) For a supplier avoiding filtration, the turbidity immediately prior to the first or only point of disinfectant application exceeds 5 NTU.

(e) A supplier discovers the occurrence of an acute infectious illness that may be potentially attributable to the water system.

Cal. Code Regs. Tit. 22, § 64663

1. New section filed 5-6-91; operative 6-5-91 (Register 91, No. 25).
2. Amendment of first paragraph and subsection (c), new subsections (e) and (f), and amendment of NOTE filed 6-8-98; operative 7-8-98 (Register 98, No. 24).
3. Amendment of subsections (a) and (b) and NOTE filed 12-13-2007; operative 1-12-2008 (Register 2007, No. 50).
4. Amendment of section and NOTE filed 5-22-2013; operative 7-1-2013 (Register 2013, No. 21).
5. Change without regulatory effect amending section heading, first paragraph, heading for Table 64663 and 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, 116375, 116450 and 116460, Health and Safety Code.

1. New section filed 5-6-91; operative 6-5-91 (Register 91, No. 25).
2. Amendment of first paragraph and subsection (c), new subsections (e) and (f), and amendment of Note filed 6-8-98; operative 7-8-98 (Register 98, No. 24).
3. Amendment of subsections (a) and (b) and Note filed 12-13-2007; operative 1-12-2008 (Register 2007, No. 50).
4. Amendment of section and Note filed 5-22-2013; operative 7-1-2013 (Register 2013, No. 21).
5. Change without regulatory effect amending section heading, first paragraph, heading for Table 64663 and Note filed 6-2-2015 pursuant to section 100, title 1, California Code of Regulations (Register 2015, No. 23).