35 Ill. Adm. Code 615.705
Closure
Section 615
Section 615.705Â Closure
a)        At closure, all materials must be removed from containers,
tanks, discharge control equipment, and discharge confinement structures.
b)Â Â Â Â Â Â Â Â All materials that are to be disposed of in the State of
Illinois must be disposed of at a disposal site permitted by the Agency under
the Act.