AUTHORITY: Implementing Section 17 and authorized by Section 27 of the Illinois Environmental Protection Act [415 ILCS 5/17 and 27].POLLUTION CONTROL BOARD
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.