35 Ill. Adm. Code 725.358
Closure and Post-Closure Care
Section 725
Section 725.358Â Closure and Post-Closure
Care
a)Â Â Â Â Â Â Â Â At closure, the owner or operator must remove or decontaminate
all waste residues, contaminated containment system components (liners, etc.),
contaminated subsoils, and structures and equipment contaminated with waste and
leachate and manage them as hazardous waste, unless 35 Ill. Adm. Code
721.103(d) applies; or
b)Â Â Â Â Â Â Â Â If, after removing or decontaminating all residues and making
all reasonable efforts to effect removal or decontamination of contaminated
components, subsoils, structures, and equipment, as required in subsection (a),
the owner or operator finds that not all contaminated subsoils can be
practicably removed or decontaminated, it must close the facility and perform
post-closure care in accordance with the closure and post-closure requirements
that apply to landfills (Section 725.410).