Wisconsin Administrative Code
Department of Natural Resources
NR 600-699 - Environmental Protection - Hazardous Waste Management
Chapter NR 679 - Used Oil Management Standards
Subchapter C - Standards for Used Oil Generators
Section NR 679.21 - Hazardous waste mixing

(1) Mixtures of used oil and hazardous waste shall be managed according to s. NR 679.10(2).

(2) The rebuttable presumption for used oil of s. NR 679.10(2) (a) 2. applies to used oil managed by generators. Under the rebuttable presumption for used oil of s. NR 679.10(2) (a) 2., used oil containing greater than or equal to 1,000 ppm total halogens is presumed to be a hazardous waste and thus shall be managed as hazardous waste and not as used oil unless the presumption is rebutted. However, the rebuttable presumption does not apply to certain metalworking oils or fluids and certain used oils removed from refrigeration units.