Unless contaminated, masks can be disposed of with the general waste, preferably a closed bin. A closed bin is a bin with a fitted lid. Where the mask is contaminated it should be disposed of in a closed bin, preferably one that does not need to be touched to place a contaminated mask inside. A bin with a foot pedal or other hands-free mechanism to open the lid would be appropriate. The bin for contaminated masks should contain two bin liners to ensure the waste is double bagged. Double bagging minimises any exposure to the person disposing of the waste.
A mask would be considered contaminated if it:
has been worn by a symptomatic worker or visitor to the workplace, or
has been worn by a close contact of a confirmed COVID case, or
is visibly soiled or damp.