(1) GENERAL
MONITORING PLAN REQUIREMENTS. Monitoring plans shall be developed, implemented
and kept up to date by water suppliers for all public water systems that are
required to be monitored for TTHMs and HAA5s and shall be kept on file for
department and public review.
(a) Monitoring
plans under this section shall be completed no later than the date the public
water system is required to begin initial compliance monitoring under s.
NR 809.60(3).
(b) The monitoring plan shall contain the all
of the following elements:
1. Monitoring
locations.
2. Monitoring
dates.
3. Compliance calculation
procedures.
4. Monitoring plans for
any other public water systems in a combined distribution system.
(c) If a public water system was
not required to submit an IDSE report to the EPA under Subpart U of
40 CFR
141.601 or
141.602
and does not have sufficient monitoring locations to identify the required
number of locations indicated in Subpart U of
40 CFR
141.605(b) or under s.
NR
809.61; the water supplier shall do all of the
following:
1. 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.
2. Provide the
rationale for identifying the locations as having high levels of TTHM or HAA5.
Water suppliers should compare the number of monitoring locations required
under s.
NR 809.565 with the number of monitoring locations under
s.
NR
809.61 Table Y. If the public water system was
required to have more monitoring locations under s.
NR 809.565 than under s. NR 809.62 compliance monitoring,
the water supplier shall identify which locations will be used by alternating
selection of locations representing high TTHM levels and high HAA5 levels until
the required number of compliance monitoring locations under s.
NR
809.61 Table Y have been
identified.
(2)
SUBMITTAL OF MONITORING PLANS. If a public water system serves > 3,300
people, the water supplier shall submit a copy of a monitoring plan to the
department prior to the date the water supplier for the public water system is
required to conduct initial monitoring under s.
NR 809.60(3), unless the IDSE report
submitted under Subpart U of 40 CFR part 141 of the Federal Regulation contains
all the information required by this subsection.
(3) REVISING MONITORING PLANS. Water
suppliers shall revise monitoring plans 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 as approved by the
department.
(a) The department shall be
consulted regarding the need for changes and the appropriateness of changes to
a monitoring plan.
(b) If
monitoring locations are changed, existing compliance monitoring locations with
the lowest LRAA shall be replaced with new locations that are expected have the
highest TTHM or HAA5 levels in the distribution system.
(c) The department may also require other
modifications in the public water systems monitoring plan.
(d) If the public water system serves >
3,300 people, the water supplier shall submit a copy of the modified monitoring
plan to the department prior to the date the public water system is required to
comply with the revised monitoring plan.
