Current through Register 2024 Notice Reg. No. 38, September 20, 2024
(a) If a public water system exceeds a Level
1 treatment technique trigger in Section
64426.7(b), the
system shall:
(1) Direct the system operator
or owner to conduct and complete a Level 1 assessment as soon as practical
after exceeding any trigger;
(2)
Ensure that the assessment is conducted to identify the possible presence of
sanitary defects and defects in distribution system coliform monitoring
practices. The assessment shall include a review and identification of the
minimum elements in subparagraphs (A) through (E) and shall describe sanitary
defects detected (and if applicable, may note no sanitary defects were
detected), corrective actions completed, and a proposed timetable for any
corrective actions not already completed:
(A)
Inadequacies in sample sites, sampling protocol, and sample
processing;
(B) Atypical events
that could affect distributed water quality or indicate that distributed water
quality was impaired;
(C) Changes
in distribution system maintenance and operation that could affect distributed
water quality (including water storage);
(D) Source and treatment considerations that
bear on distributed water quality, where appropriate (e.g., small groundwater
systems or whether a groundwater system is disinfected); and
(E) Existing water quality monitoring
data;
(3) Conduct the
assessment consistent with any State Board directives that tailor specific
assessment elements with respect to the size and type of the water system and
the size, type, and characteristics of the distribution system;
(4) Within 30 days after the system learns
that it has exceeded a trigger, submit to the State Board the completed
assessment; and
(5) If directed by
the State Board, based on its determination that the completed assessment is
not sufficient (including any proposed timetable for any corrective actions not
already completed), submit a revised completed assessment to the State Board
within 30 days.
(b) If a
public water system exceeds a Level 2 treatment technique trigger in Section
64426.7(c), the
system shall:
(1) Arrange with the State Board
to conduct and complete a Level 2 assessment, that includes a review and
identification of the minimum elements in subsections (a)(2)(A) through (E) to
identify the possible presence of sanitary defects and defects in distribution
system coliform monitoring practices, as soon as practical after exceeding any
trigger;
(2) Comply with any
expedited actions or additional actions required by the State Board in the case
of an E. coli MCL violation;
(3) Within 30 days after the system learns
that it has exceeded a trigger, submit to the State Board a completed
assessment that includes the State Board assessment and describes sanitary
defects detected (and if applicable, may note no sanitary defects were
detected), corrective actions completed, and a proposed timetable for any
corrective actions not already completed; and
(4) If directed by the State Board, based on
its determination that the completed assessment is not sufficient (including
any proposed timetable for any corrective actions not already completed),
submit a revised description of corrective actions completed and a proposed
timetable for any corrective actions not already completed to the State Board
within 30 days.
(c) A
public water system shall correct sanitary defects found through either a Level
1 or Level 2 assessment conducted under subsection (a) or (b), respectively.
For corrections not completed by the time of submission of the completed
assessment, the system shall complete the corrective action(s) in compliance
with a State Board-approved timetable. The system shall notify the State Board
within five business days when each scheduled corrective action is
completed.
(d) A public water
system in violation of the reporting requirement of subsection (a)(4) or (b)(3)
to submit a completed assessment to the State Board or subsection (c) to notify
the State Board shall notify the public pursuant to Sections
64463,
64463.7, and
64465.
1. New
section filed 5-28-2021; operative 7-1-2021 (Register 2021, No.
22).
2. Change without regulatory effect amending subsection (d)
filed 7-12-2022 pursuant to section
100, title 1, California Code of
Regulations (Register 2022, No. 28).
Note: Authority cited: Sections
116271
and
116375,
Health and Safety Code. Reference: Sections
116375
and
116450,
Health and Safety Code.
