1. (a)(1) The pile shall 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 shall 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 shall 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, for example, tanks or basins, associated with run-on and run-off control systems shall be emptied or otherwise managed expeditiously to maintain design capacity of the system; or

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

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

   Comment: 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 402 of the Clean Water Act, as amended.

If leachate or run-off from a pile is a hazardous waste, then either:

KEY: hazardous waste, TSD facilities, interim status

Date of Last Change: November 17, 2025

Notice of Continuation: December 11, 2025

Authorizing, and Implemented or Interpreted Law: 19-6-105; 19-6-106