Occasionally laboratory waste may contain or be contaminated with a combination or mixture of biological, chemical and radioactive materials. This type of waste poses a challenge for disposal. Inactivation and disposal will be considered on a case-by-case basis, as required. See the Environmental Health & Safety webpage for more information.
As a general rule for waste containing combinations of hazardous chemical, radioactive and biological agents, the biological hazard should be inactivated first.
Steam sterilization is generally not recommended for waste containing combinations of significant quantities of hazardous chemical, radioactive and biological agents. Chemical disinfection should be used.