Ill. Admin. Code tit. 35, § 611.744 - Filtration Sampling Requirements
a) Monitoring Requirements for Systems Using
Filtration Treatment. In addition to monitoring required by Sections
611.531 and
611.533, a PWS subject to the
requirements of this Subpart R that provides conventional filtration treatment
or direct filtration must conduct continuous monitoring of turbidity for each
individual filter using an approved method in Section
611.531(a) and
must calibrate turbidimeters using the procedure specified by the manufacturer.
Systems must record the results of individual filter monitoring every 15
minutes.
b) If there is a failure
in the continuous turbidity monitoring equipment, the system must conduct grab
sampling every four hours in lieu of continuous monitoring, until the
turbidimeter is back online. A system must repair the equipment within a
maximum of five working days after failure.
Notes
Amended at 27 Ill. Reg. 16447, effective October 10, 2003
BOARD NOTE: Derived from 40 CFR 141.174.
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