Current through Register Vol. 48, No. 38, September 20, 2024
a) Reporting. This Subpart X requires a
supplier to report several items to the Agency. Subsections (a)(1) through
(a)(4) describe the items that must be reported and the frequency of reporting.
(The supplier is required to report the information described in subsections
(a)(1) through (a)(4), if it is subject to the specific requirement indicated.)
1) If a supplier is subject to the combined
filter effluent requirements (Section
611.955
), it must report as follows:
A) The total
number of filtered water turbidity measurements taken during the month, by the
10th of the following month.
B) The number and percentage of filtered
water turbidity measurements taken during the month that are less than or equal
to the supplier's required 95th percentile limit, by
the 10th of the following month.
C) The date and value of any turbidity
measurements taken during the month that exceed the maximum turbidity value for
the supplier's filtration system, by the 10th of the
following month.
2) If
the supplier is subject to the individual filter turbidity requirements
(Section
611.956
), it must report as follows:
A) The fact
that the supplier's system conducted individual filter turbidity monitoring
during the month, by the 10th of the following
month.
B) The filter numbers,
corresponding dates, and the turbidity values that exceeded 1.0 NTU during the
month, by the 10th of the following month, but only
if two consecutive measurements exceeded 1.0 NTU.
C) If a self-assessment is required, the date
that it was triggered and the date that it was completed, by the
10th of the following month (or 14 days after the
self-assessment was triggered only if the self-assessment was triggered during
the last four days of the month).
D) If a CPE is required, the fact that the
CPE is required and the date that it was triggered, by the
10th of the following month.
E) A copy of completed CPE report, within 120
days after the CPE was triggered.
3) If the supplier is subject to the
disinfection profiling (Section
611.953) ,
it must report results of optional monitoring that show TTHM levels 0.064 mg/l
and HAA5 levels 0.048 mg/l (only if the supplier wishes to forgo profiling) or
that the supplier has begun disinfection profiling.
4) If the supplier is subject to the
disinfection benchmarking (Section
611.954) ,
it must report a description of the proposed change in disinfection, its
system's disinfection profile for Giardia lamblia (and, if necessary, viruses)
and disinfection benchmark, and an analysis of how the proposed change will
affect the current levels of disinfection, anytime the supplier is considering
a significant change to its disinfection practice.
b) Recordkeeping. A supplier must keep
several types of records based on the requirements of this Subpart X, in
addition to recordkeeping requirements under Sections
611.261
and
611.262.
Subsections (b)(1) through (b)(3) describe the necessary records, the length of
time these records must be kept, and for which requirement the records pertain.
(The supplier is required to maintain records described in subsections (b)(1)
through (b)(3), if it is subject to the specific requirement indicated.)
1) If the supplier is subject to the
individual filter turbidity requirements (Section 611.956), it must retain the
results of individual filter monitoring as necessary records for at least three
years.
2) If the supplier is
subject to disinfection profiling (Section 611.953), it must retain the results
of its disinfection profile (including raw data and analysis) as necessary
records indefinitely.
3) If the
supplier is subject to disinfection benchmarking (Section 611.954), it must
retain its disinfection benchmark (including raw data and analysis) as
necessary records indefinitely.
BOARD NOTE: Derived from
40
CFR 141.570 and
141.571
(2016).
