Wisconsin Administrative Code
Department of Natural Resources
NR 600-699 - Environmental Protection - Hazardous Waste Management
Chapter NR 667 - Standards For Owners And Operators Of Hazardous Waste Facilities Operating Under A Standardized License
Subchapter G - Closure
Section NR 667.0111 - What general standards shall I meet when I stop operating the unit?

(1) Minimizes the need for further maintenance.

(2) Controls, minimizes, or eliminates, to the extent necessary to protect human health and the environment, postclosure escape of hazardous waste, hazardous constituents, leachate, contaminated run-off, or hazardous waste decomposition products to the ground or surface waters or to the atmosphere.

(3) Meets the closure requirements of this subchapter and the requirements of ss. NR 667.0176, 667.0201, and 667.1108. If you determine that, when applicable, the closure requirements of ss. NR 667.0201(tanks), or 667.1108 (containment buildings) cannot be met, then you shall close the unit according to the requirements that apply to landfills (s. NR 664.0310). In addition, for the purposes of postclosure care and financial responsibility, the tank system or containment building is then considered to be a landfill and you shall apply for a long-term care license according to ch. NR 670.