Indiana Administrative Code
Title 327 - WATER POLLUTION CONTROL DIVISION
Article 8 - PUBLIC WATER SUPPLY
Rule 2.6 - Enhanced Filtration and Disinfection
Section 2.6-9 - Requirements when making a significant change in disinfection practice; disinfection profiling and benchmarking requirements; enhanced treatment for Cryptosporidium
Universal Citation: 327 IN Admin Code 2.6-9
Current through September 18, 2024
Authority: IC 13-13-5; IC 13-14-8-7; IC 13-14-9; IC 13-18-3-2; IC 13-18-16
Affected: IC 13-18-3-11
Sec. 9.
(a) Following the completion of initial source water monitoring under 40 CFR 141.701(a), as incorporated by reference in section 8(a)(1) of this rule, a PWS that plans to make a significant change to its disinfection practice, as defined in subsection (b), shall do the following:
(1) Develop
disinfection profiles and calculate disinfection benchmarks for Giardia lamblia
and viruses as described in section 10 of this rule.
(2) Notify the commissioner prior to changing
the disinfection practice and include in this notice the following information:
(A) A completed disinfection profile and
disinfection benchmark for Giardia lamblia and viruses as described in section
10 of this rule.
(B) A description
of the proposed change in disinfection practice.
(C) An analysis of how the proposed change
will affect the current level of disinfection.
(b) Significant changes to disinfection practices are defined as follows:
(1) Changes
to the point of disinfection.
(2)
Changes to the disinfectant or disinfectants used in the treatment
plant.
(3) Changes to the
disinfection process.
(4) Any other
modification identified by the commissioner as a significant change to
disinfection practice.
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