Section 616.446  Operating Requirements

a)         A person must not cause or allow incompatible materials to be placed in the same surface impoundment unit.

b)         A surface impoundment unit must be removed from service in compliance with subsection (c) when:

1)         The level of liquids in the unit suddenly drops and the drop is not known to be caused by changes in the flows into or out of the unit; or

2)         The dike leaks.

c)         When a surface impoundment unit is removed from service as required by subsection (b), the owner or operator must:

1)         Shut off the flow or stop the addition of wastes into the impoundment unit;

2)         Contain any surface leakage that has occurred or is occurring;

3)         Stop the leak;

4)         Take any other necessary steps to stop or prevent catastrophic failure;

5)         If a leak cannot be stopped by any other means, empty the impoundment unit; and

6)         Notify the Agency of the removal from service and corrective actions that were taken within 10 days after the removal from service.

d)         A surface impoundment unit that has been removed from service in compliance with the requirements of this Section may be restored to service only if the portion of the unit that failed has been repaired.

e)         A surface impoundment unit that has been removed from service in compliance with the requirements of this Section and that is not being repaired must be closed in compliance with the provisions of Section 616.447.

(Source:  Amended at 47 Ill. Reg. 7631, effective May 16, 2023)