Ill. Admin. Code tit. 35, pt. 611, subpt. AG, tbl. I

Current through Register Vol. 48, No. 49, December 6, 2024

Table I - CT Values (mg·min/l) for Cryptosporidium Inactivation by Ozone

Log Credit	Water Temperature (°C)
	[LESS THAN OR EQUAL TO] 0.5	1	2	3	5	7	10	15	20	25	30
0.25	6.0	5.8	5.2	4.8	4.0	3.3	2.5	1.6	1.0	0.6	0.39
0.5	12	12	10	9.5	7.9	6.5	4.9	3.1	2.0	1.2	0.78
1.0	24	23	21	19	16	13	9.9	6.2	3.9	2.5	1.6
1.5	36	35	31	29	24	20	15	9.3	5.9	3.7	2.4
2.0	48	46	42	38	32	26	20	12	7.8	4.9	3.1
2.5	60	58	52	48	40	33	25	16	9.8	6.2	3.9
3.0	72	69	63	57	47	39	30	19	12	7.4	4.7

A supplier may use the following equation to determine log credit between the indicated values:

Log credit = (0.0397 a ? (1.09757 )^{Temp(in °C)}) a ? ? CT

Ill. Admin. Code tit. 35, pt. 611, subpt. AG, tbl. I

Amended at 37 Ill. Reg. 1978, effective February 4, 2013

BOARD NOTE: Derived from the table at 40 CFR 141.720(b)(2) (2012).