Current through Register Vol. 46, No. 3, March 25, 2022
Monitoring Plan Development.
Systems must develop and implement a
monitoring plan to be kept on file for Department and public review. The
monitoring plan must contain the elements in paragraphs (1)(a)(i) through
(1)(a)(iv) of this section and be complete no later than the date the system
conducts initial monitoring under this part R.61-58.15
(i) Monitoring locations;
(ii) Monitoring dates;
(iii) Compliance calculation procedures;
Monitoring plans for any
other systems in the combined distribution system if the Department has reduced
monitoring requirements under the authority granted in
For systems that were not
required to submit an IDSE report under either section R.61-58.14.C
and do not have sufficient R.61-58.13
to identify the required number of R.61-58.15
monitoring locations indicated in R.61-58.14.G(2)
they must identify additional locations by alternating selection of locations
representing high TTHM levels and high HAA5 levels until the required number of
compliance monitoring locations have been identified. Systems must also provide
the rationale for identifying the locations as having high levels of TTHM or
HAA5. If a system has more R.61-58.13
than required for R.61-58.15
they must identify which locations they will use for R.61-58.15
monitoring by alternating selection of locations representing high TTHM levels
and high HAA5 levels until the required number of R.61-58.15
monitoring locations have been identified.
Subpart H systems serving > 3,300
people must submit a copy of the monitoring plan required under this section to
the Department prior to the date the system begins initial monitoring under
this part R.61-58.15
, unless the IDSE
report submitted under R.61-58.14
contains all the
information required by this section.
(3) Systems may revise their monitoring plan
to reflect changes in treatment, distribution system operations and layout
(including new service areas), or other factors that may affect TTHM or HAA5
formation, or for Department approved reasons, after consultation with the
Department regarding the need for changes and the appropriateness of changes.
If a system changes monitoring locations, they must replace existing compliance
monitoring locations that have the lowest LRAA with new locations that reflect
the current distribution system locations with expected high TTHM or HAA5
levels. The Department may also require modifications in the monitoring plan.
Subpart H systems serving > 3,300 people, must submit a copy of their
modified monitoring plan to the Department prior to the date they are required
to comply with the revised monitoring plan.