Illinois Administrative Code (Last Updated: March 27, 2024) |
TITLE35. ENVIRONMENTAL PROTECTION |
PART604. DESIGN, OPERATION, AND MAINTENANCE CRITERIA |
SUBPARTJ. OTHER TREATMENT |
§604.1000. Presedimentation
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a) Basin Design: presedimentation basins must have the capability for dewatering. These basins may include hopper bottoms or a continuous mechanical sludge removal apparatus;
b) Inlet: short-circuiting must be prevented;
c) Bypass: provisions for bypassing presedimentation basins must be included; and
d) Detention time must be adequate. Unless otherwise approved by the Agency under Section 604.145(b), three hours detention is the minimum period.