Illinois Administrative Code
Title 35 - ENVIRONMENTAL PROTECTION
Part 604 - DESIGN, OPERATION, AND MAINTENANCE CRITERIA
Subpart G - DISINFECTION
Section 604.705 - Chlorination Equipment
Universal Citation: 35 IL Admin Code ยง 604.705
Current through Register Vol. 48, No. 38, September 20, 2024
a) Procedure for Submitting Plans and Specifications - Design documents for chlorination must be prepared and submitted in accordance with 35 Ill. Adm. Code 602.
b) Chlorination equipment must:
1) be large enough to satisfy the
immediate chlorine demand and give a measurable residual of at least 2.0 mg/L
of total chlorine under all operating conditions after contact;
2) be capable of feeding chlorine to the
water being treated at a dosage rate of at least 5.0 mg/L, except when the
water has a high chlorine demand. Factors in determining chlorine demand are:
A) pH;
B) water temperature;
C) contact time;
D) presence in the water of substances having
chlorine demand such as hydrogen sulfide, iron, manganese and nitrogenous
compounds including ammonia; and
E)
supplemental treatment such as aeration that reduces chlorine demand;
3) be provided in duplicate when
operating conditions do not allow repair of the chlorinator during off-pumping
periods;
4) be provided in
duplicate, installed and operational, at community water supplies treating
surface water, groundwater under the direct influence of surface water, and
groundwater with a history of total coliform positive results; and
5) include spare parts for emergency repairs
consisting of at least the commonly expendable parts such as glassware,
fittings, hose clamps, and gaskets.
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