Wisconsin Administrative Code
Department of Natural Resources
NR 600-699 - Environmental Protection - Hazardous Waste Management
Chapter NR 664 - Hazardous Waste Treatment, Storage And Disposal Facility Standards
Subchapter EE - Hazardous Waste Munitions and Explosives Storage
Section NR 664.1202 - Closure and long-term care

(1) At closure of a magazine or unit which stored hazardous waste under this subchapter, the owner or operator shall 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 s. NR 661.0003(4) applies. The closure plan, closure activities, cost estimates for closure and financial responsibility for magazines or units shall meet all of the requirements specified in subchs. 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.

(2) 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 sub. (1), the owner or operator finds that not all contaminated subsoils can be practicably removed or decontaminated, the owner or operator shall close the facility and perform long-term care in accordance with the closure and long-term care requirements that apply to landfills (s. NR 664.0310).