Illinois Administrative Code
Title 35 - ENVIRONMENTAL PROTECTION
Part 653 - DESIGN, OPERATION AND MAINTENANCE CRITERIA
Subpart A - DESIGN REQUIREMENTS
Section 653.116 - Filtration Rates
Universal Citation: 35 IL Admin Code ยง 653.116
Current through Register Vol. 48, No. 38, September 20, 2024
a) The nominal filter rate for single and multi media rapid rate gravity filters shall be 2 gal/min/sq ft.
b) Nominal filtration rates may be increased to 3 gal/min/sq ft for single media filters and to 5 gal/min/sq ft for multi-media filters under the following conditions:
1) continuous nephelometric turbidity
monitoring and recording equipment is provided for each filter effluent
individually or on a rotating basis; and
2) surface wash equipment is
provided.
c) Filtration rates shall be reduced when finished water turbidity exceeds the standard in 35 Ill. Adm. Code 604.202.
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