Biohazardous Mixed Waste

Definition:  Biohazardous mixed-waste is biohazardous waste which falls into two or more different categories of hazardous materials.  Biohazardous waste that may also contain radioactive waste and/or (chemically) hazardous waste is defined as biohazardous mixed waste.  As a result, waste handling, disposal, and regulations are complex. Several different regulatory frameworks and federal agencies are involved. Whenever possible, it is best to avoid generating mixed wastes.

Biohazardous Waste that contains radioactive material
Biohazardous material contaminated with radionuclides must be treated as a radioactive waste with a biohazard label.  Radioactive biohazardous waste can be sterilized through the use of an autoclave or chemical inactivation but first must be approved by the RSO. Please consult with the Biosafety Officer for additional approved methods of sterilization.

Biohazardous Waste that contains hazardous chemicals
Biohazardous waste containing hazardous Chemical Waste must be treated as Hazardous Chemical Waste with a biohazard label.  When possible, disinfect the biohazardous part of the mix and then dispose of it as chemical waste. Hazardous chemical biohazardous waste should never be autoclaved without prior approval from the BSO.

Biohazardous Waste that contains both radioactive material and hazardous chemicals
If the biohazardous waste contains both radionuclides and hazardous chemicals, the material must be treated as a radioactive waste with a biohazard label and the hazardous chemical clearly identified on the container.  Radioactive biohazardous mixed waste should never be autoclaved without prior approval from the RSO.