Wisconsin Administrative Code
Department of Natural Resources
NR 600-699 - Environmental Protection - Hazardous Waste Management
Chapter NR 665 - Interim License Hazardous Waste Treatment, Storage And Disposal Facility Standards
Subchapter G - Closure and Long-Term Care
Section NR 665.0115 - Certification of closure

Within 60 days of completion of closure of each hazardous waste surface impoundment, waste pile and landfill unit, and within 60 days of completion of final closure, the owner or operator shall submit to the department, by registered mail, a certification that the hazardous waste management unit or facility, as applicable, has been closed in accordance with the specifications in the approved closure plan. The certification shall be signed by the owner or operator and by a qualified professional engineer. Documentation supporting the professional engineer's certification shall be furnished to the department upon request until the department releases the owner or operator from the financial assurance requirements for closure under s. NR 665.0143(10).