Current through September 18, 2024
Authority: IC 13-13-5-1; IC 13-14-8-2; IC 13-14-8-7; IC
13-18-3-2
Affected: IC 13-12-3-1; IC 13-13-5-2; IC 13-14-9; IC
13-18-11
Sec. 5.
Beginning January 1, 2002, a Subpart H system serving a
population of at least ten thousand (10,000) individuals and, beginning January
1, 2005, a Subpart H system serving a population of fewer than ten thousand
(10,000) individuals that are subject to the requirements of section 3 of this
rule and provide conventional filtration treatment or direct filtration shall
meet the following requirements in addition to the reporting and record keeping
requirements in
327
IAC 8-2-14:
(1) Turbidity measurements as required by
section 3 of this rule must be reported within ten (10) days after the end of
each month the system serves water to the public. Information that must be
reported includes the following:
(A) The
total number of filtered water turbidity measurements taken during the
month.
(B) The number and
percentage of filtered water turbidity measurements taken during the month that
are less than or equal to the turbidity limits specified in section 3 of this
rule.
(C) The date and value of any
turbidity measurements taken during the month that exceed:
(i) one and zero-tenths (1.0) nephelometric
turbidity unit for systems using conventional filtration treatment or direct
filtration; or
(ii) the maximum
level set by the commissioner under section 3 of this rule. This reporting
requirement is instead of the reporting specified in
327
IAC 8-2-14(b).
(2) Subpart H systems serving a
population of at least ten thousand (10,000) individuals shall maintain the
results of individual filter monitoring taken under section 4 of this rule for
at least three (3) years. These systems shall report that they have conducted
individual filter turbidity monitoring under section 3 of this rule within ten
(10) days after the end of each month they serve water to the public. These
systems shall report individual filter turbidity measurement results taken
under
327
IAC 8-2.5-4 if measurements demonstrate one (1) or
more of the following conditions:
(A) For any
individual filter that has a measured turbidity level of greater than one and
zero-tenths (1.0) nephelometric turbidity unit in two (2) consecutive
measurements taken fifteen (15) minutes apart, Subpart H systems serving a
population of at least ten thousand (10,000) individuals shall report the:
(i) filter number;
(ii) turbidity measurement; and
(iii) date when the exceedance occurred.
In addition, the system shall either produce a filter profile
for the filter within seven (7) days of the exceedance, if the system is not
able to identify an obvious reason for the abnormal filter performance, and
report that the profile has been produced or report the obvious reason for the
exceedance.
(B)
For any individual filter that has a measured turbidity level of greater than
five-tenths (0.5) in two (2) consecutive measurements taken fifteen (15)
minutes apart at the end of the first four (4) hours of continuous filter
operation after the filter has been backwashed or otherwise taken off-line,
Subpart H systems serving a population of at least ten thousand (10,000)
individuals shall report the:
(i) filter
number;
(ii) turbidity measurement;
and
(iii) date when the exceedance
occurred.
In addition, the system shall either produce a filter profile
for the filter within seven (7) days of the exceedance, if the system is not
able to identify an obvious reason for the abnormal filter performance, and
report that the profile has been produced or report the obvious reason for the
exceedance.
(C)
For any individual filter that has a measured turbidity level of greater than
one and zero-tenths (1.0) nephelometric turbidity unit in two (2) consecutive
measurements taken fifteen (15) minutes apart at any time in each of three (3)
consecutive months, Subpart H systems serving a population of at least ten
thousand (10,000) shall report the filter number, the turbidity measurement,
and the date when the exceedance occurred. In addition, the system shall
conduct a self-assessment of the filter within fourteen (14) days of the
exceedance and report that the self-assessment was conducted. The
self-assessment must consist of at least the following components:
(i) Assessment of filter
performance.
(ii) Development of a
filter profile.
(iii)
Identification and prioritization of factors limiting filter
performance.
(iv) Assessment of the
applicability of corrections.
(v)
Preparation of a filter self-assessment report.
(D) For any individual filter that has a
measured turbidity level of greater than two and zero-tenths (2.0)
nephelometric turbidity units in two (2) consecutive measurements taken fifteen
(15) minutes apart at any time in each of two (2) consecutive months, Subpart H
systems serving a population of at least ten thousand (10,000) individuals
shall report the:
(i) filter
number;
(ii) turbidity measurement;
and
(iii) date when the exceedance
occurred.
In addition, the system shall arrange for the conduct of a
CPE by the commissioner or a third party approved by the commissioner not later
than thirty (30) days following the exceedance and have the evaluation
completed and submitted to the commissioner not later than ninety (90) days
following the exceedance.
(3) Additional reporting requirements for
Subpart H systems serving a population of at least ten thousand (10,000)
individuals are as follows:
(A) If at any
time the turbidity exceeds one and zero-tenths (1.0) nephelometric turbidity
unit in representative samples of filtered water in a Subpart H system serving
a population of at least ten thousand (10,000) individuals using conventional
filtration treatment or direct filtration, the system shall inform the
commissioner as soon as possible, but not later than the end of the next
business day.
(B) If at any time
the turbidity in representative samples of filtered water exceeds the maximum
level set by the commissioner under section 3 of this rule for filtration
technologies other than:
(i) conventional
filtration treatment;
(ii) direct
filtration;
(iii) slow sand
filtration; or
(iv) diatomaceous
earth filtration;
Subpart H systems serving a population of at least ten
thousand (10,000) individuals shall inform the commissioner as soon as
possible, but not later than the end of the next business day.
(4)
Beginning January 1, 2005, a Subpart H system serving a population of fewer
than ten thousand (10,000) individuals shall maintain the results of individual
filter monitoring taken under section 4 of this rule for at least three (3)
years. The system shall report that it has conducted individual filter
turbidity monitoring under section 4 of this rule within ten (10) days after
the end of each month the system serves water to the public. The system shall
report to the commissioner the results of conducting individual filter
turbidity monitoring under section 3 of this rule within ten (10) days after
the end of each month that water is served to the public if measurements
demonstrate one (1) or more of the following conditions:
(A) If the turbidity of an individual filter
(or the turbidity of combined filter effluent (CFE) for systems with two (2)
filters that monitor CFE instead of individual filters) exceeds one and
zero-tenths (1.0) NTU in two (2) consecutive recordings fifteen (15) minutes
apart, a Subpart H system serving a population of fewer than ten thousand
(10,000) individuals shall report to the commissioner by the tenth day of the
following month and include:
(i) the filter
number or numbers;
(ii)
corresponding date or dates; and
(iii) turbidity value or values;
that exceeded one and zero-tenths (1.0) NTU and the cause (if
known) for the exceedance or exceedances.
(B) If a Subpart H system serving a
population of fewer than ten thousand (10,000) individuals was required to
report to the commissioner for three (3) months in a row and turbidity exceeded
one and zero-tenths (1.0) NTU in two (2) consecutive recordings fifteen (15)
minutes apart at the same filter (or CFE for systems with two (2) filters that
monitor CFE instead of individual filters), the system shall conduct a
self-assessment of the filter or filters within fourteen (14) days of the day
the filter exceeded one and zero-tenths (1.0) NTU in two (2) consecutive
measurements for the third straight month unless a CPE as specified in clause
(C) was required. Systems with two (2) filters that monitor CFE instead of
individual filters shall conduct a self- assessment on both filters. The system
shall report to the commissioner the date that the self-assessment was
triggered and the date it was completed. The self-assessment must consist of at
least the following components:
(i) Assessment
of filter performance.
(ii)
Development of a filter profile.
(iii) Identification and prioritization of
factors limiting filter performance.
(iv) Assessment of the applicability of
corrections.
(v) Preparation of a
filter self-assessment report.
(C) If a Subpart H system serving a
population of fewer than ten thousand (10,000) individuals was required to
report to the commissioner for two (2) months in a row and turbidity exceeded
two and zero-tenths (2.0) NTU in two (2) consecutive recordings fifteen (15)
minutes apart at the same filter (or CFE for systems with two (2) filters that
monitor CFE instead of individual filters), the system shall meet the following
requirements:
(i) Arrange to have a CPE
conducted by the commissioner or a third party approved by the commissioner not
later than sixty (60) days following the day the filter exceeded two and
zero-tenths (2.0) NTU in two (2) consecutive measurements for the second
straight month. A CPE is further conditioned as follows:
(AA) If a CPE has been completed by the
commissioner or a third party approved by the commissioner within the twelve
(12) prior months or the system and commissioner are jointly participating in
an ongoing comprehensive technical assistance (CTA) project at the system, a
new CPE is not required. (BB) If conducted, a CPE must be completed and
submitted to the commissioner not later than one hundred twenty (120) days
following the day the filter exceeded two and zero-tenths (2.0) NTU in two (2)
consecutive measurements for the second straight month. (ii) Report to the
commissioner:
(AA) that a CPE is required;
and
(BB) the date that the CPE was
triggered;
within ten (10) days after the end of each month that water
is served to the public.
(5) Beginning January 1, 2005,
disinfection profiling and benchmarking reporting and record keeping
requirements for Subpart H systems serving a population of fewer than ten
thousand (10,000) individuals are as follows:
(A) Disinfection profiling reporting and
record keeping requirements are as follows:
(i) Systems shall report results of optional
monitoring that show:
(AA) TTHM levels less
than sixty-four thousandths (0.064) mg/L and HAA5 levels less than forty-eight
thousandths (0.048) mg/L (only if the system is not conducting a profile);
or
(BB) the system has begun
disinfection profiling by July 1, 2003, for systems serving five hundred (500)
to nine thousand nine hundred ninety-nine (9,999) and January 1, 2004, for
systems serving fewer than five hundred (500).
(ii) Systems subject to disinfection
profiling under section 2.1 of this rule shall keep results of profiling
(including raw data and analysis) indefinitely.
(B) Disinfection benchmarking reporting and
record keeping requirements are as follows:
(i) A system considering a significant change
to its disinfection practice that is subject to disinfection benchmarking
requirements under section 2.1 of this rule shall report the following to the
commissioner:
(AA) A description of the
proposed change in disinfection.
(BB) The system's disinfection profile for
Giardia lamblia (and, if necessary, viruses).
(CC) The system's disinfection
benchmark.
(DD) An analysis of how
the proposed change will affect the current levels of disinfection.
(ii) Systems subject to
disinfection benchmarking under section 2.1 of this rule shall keep the
benchmark (including raw data and analysis) indefinitely.
(6) Systems that use lime
softening may apply to the commissioner for alternative exceedance levels for
the levels specified in subdivisions (2) and (4) if they can demonstrate that
higher turbidity levels in individual filters are due to lime carryover only
and not due to degraded filter performance.
