1. a) Control by Pile Design, Construction, and Operation

   1. 1) The pile must be placed on an impermeable base that is compatible with the waste under the conditions of treatment or storage;
   2. 2) The owner or operator must design, construct, operate and maintain a run-on control system capable of preventing flow onto the active portion of the pile during peak discharge from at least a 25-year storm;
   3. 3) The owner or operator must design, construct, operate and maintain a run-off management system to collect and control at least the water volume resulting from a 24-hour, 25-year storm; and
   4. 4) Collection and holding facilities (e.g., tanks or basins) associated with run-on and run-off control systems must be emptied or otherwise managed expeditiously to maintain design capacity of the system; or

2. b) Alternative Control

   1. 1) The pile must be protected from precipitation and run-on by some other means; and

   2. 2) No liquids or wastes containing free liquids may be placed in the pile.

      BOARD NOTE: If collected leachate or run-off is discharged through a point source to waters of the United States, it is subject to the requirements of Section 12 of the Act.

If leachate or run-off from a pile is a hazardous waste, then control of the leachate or run-off must be accomplished by either of the following means:

(Source: Amended at 43 Ill. Reg. 6049, effective May 2, 2019)