Illinois Administrative Code
Title 35 - ENVIRONMENTAL PROTECTION
Part 611 - PRIMARY DRINKING WATER STANDARDS
Subpart Y - STAGE 2 DISINFECTION BYPRODUCTS REQUIREMENTS
Section 611.972 - Subpart Y Monitoring Plan
Current through Register Vol. 48, No. 38, September 20, 2024
a) Development of a Monitoring Plan
b) A Subpart B system supplier that serves more than 3,300 people must submit a copy of its monitoring plan to the Agency prior to the date it conducts its initial monitoring under this Subpart Y, unless the supplier's IDSE report submitted under Subpart W contains all the information required by this Section.
c) After consultation with the Agency regarding the need for and appropriateness of changes and issuance of a SEP that provides for the changes, a supplier may revise its 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 Agency-approved reasons. If the supplier changes monitoring locations, the supplier must replace existing compliance monitoring locations with the lowest LRAA with new locations that reflect the current distribution system locations with expected high TTHM or HAA5 levels. The Agency may, by a SEP, also require modifications in the supplier's monitoring plan. If a supplier is a Subpart B system supplier that serves more than 3,300 people, it must submit a copy of its modified monitoring plan to the Agency prior to the date when it is required to comply with the revised monitoring plan.
BOARD NOTE: Derived from 40 CFR 141.622.