SUBTITLE F: PUBLIC WATER SUPPLIES
CHAPTER I: POLLUTION CONTROL BOARD
PART 611 PRIMARY DRINKING WATER STANDARDS
SECTION 611.957 REPORTING AND RECORDKEEPING REQUIREMENTS
Section 611.957 Reporting and Recordkeeping Requirements
a) Reporting. This Subpart X requires a supplier to report several items to the Agency. Subsections (a)(1) through (a)(4) describe the items that must be reported and the frequency of reporting. (The supplier is required to report the information described in subsections (a)(1) through (a)(4), if it is subject to the specific requirement indicated.)
1) If a supplier is subject to the combined filter effluent requirements (Section 611.955), it must report as follows:
A) The total number of filtered water turbidity measurements taken during the month, by the 10th of the following month.
B) The number and percentage of filtered water turbidity measurements taken during the month that are less than or equal to the supplier's required 95th percentile limit, by the 10th of the following month.
C) The date and value of any turbidity measurements taken during the month that exceed the maximum turbidity value for the supplier's filtration system, by the 10th of the following month.
2) If the supplier is subject to the individual filter turbidity requirements (Section 611.956), it must report as follows:
A) The fact that the supplier's system conducted individual filter turbidity monitoring during the month, by the 10th of the following month.
B) The filter numbers, corresponding dates, and the turbidity values that exceeded 1.0 NTU during the month, by the 10th of the following month, but only if two consecutive measurements exceeded 1.0 NTU.
C) If a self-assessment is required, the date that it was triggered and the date that it was completed, by the 10th of the following month (or 14 days after the self-assessment was triggered only if the self-assessment was triggered during the last four days of the month).
D) If a CPE is required, the fact that the CPE is required and the date that it was triggered, by the 10th of the following month.
E) A copy of completed CPE report, within 120 days after the CPE was triggered.
3) If the supplier is subject to the disinfection profiling (Section 611.953), it must report results of optional monitoring that show TTHM levels 0.064 mg/ℓ and HAA5 levels 0.048 mg/ℓ (only if the supplier wishes to forgo profiling) or that the supplier has begun disinfection profiling.
4) If the supplier is subject to the disinfection benchmarking (Section 611.954), it must report a description of the proposed change in disinfection, its system’s disinfection profile for Giardia lamblia (and, if necessary, viruses) and disinfection benchmark, and an analysis of how the proposed change will affect the current levels of disinfection, anytime the supplier is considering a significant change to its disinfection practice.
b) Recordkeeping. A supplier must keep several types of records based on the requirements of this Subpart X, in addition to recordkeeping requirements under Sections 611.261 and 611.262. Subsections (b)(1) through (b)(3) describe the necessary records, the length of time these records must be kept, and for which requirement the records pertain. (The supplier is required to maintain records described in subsections (b)(1) through (b)(3), if it is subject to the specific requirement indicated.)
1) If the supplier is subject to the individual filter turbidity requirements (Section 611.956), it must retain the results of individual filter monitoring as necessary records for at least three years.
2) If the supplier is subject to disinfection profiling (Section 611.953), it must retain the results of its disinfection profile (including raw data and analysis) as necessary records indefinitely.
3) If the supplier is subject to disinfection benchmarking (Section 611.954), it must retain its disinfection benchmark (including raw data and analysis) as necessary records indefinitely.
BOARD NOTE: Derived from 40 CFR 141.570 and 141.571 (2016).
(Source: Amended at 42 Ill. Reg. 1140, effective January 4, 2018)