Ill. Admin. Code tit. 35 § 653.116

Current through Register Vol. 48, No. 45, November 8, 2024

Section 653.116 - Filtration Rates

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.

Ill. Admin. Code tit. 35, § 653.116