Section 725.1202  Closure and Post-Closure Care

a)         At closure of a magazine or unit that stored hazardous waste under this Subpart EE, the owner or operator must remove or decontaminate all waste residues, contaminated containment system components, contaminated subsoils, and structures and equipment contaminated with waste and manage them as hazardous waste, unless 35 Ill. Adm. Code 721.103(d) applies.  The closure plan, closure activities, cost estimates for closure, and financial responsibility for magazines or units must meet all of the requirements specified in Subparts G and H, except that the owner or operator may defer closure of the unit as long as it remains in service as a munitions or explosives magazine or storage unit.

b)         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, the owner or operator must close the facility and perform post-closure care in accordance with the closure and post-closure requirements that apply to landfills (see 35 Ill. Adm. Code 724.410).

(Source:  Amended at 42 Ill. Reg. 23725, effective November 19, 2018)