How frequently should the fit check for a respirator be performed?

A fit check for a respirator should be performed every time the mask is used to ensure that it forms a proper seal against the face. This is crucial because even minor issues with the fit can significantly compromise the effectiveness of the respirator, exposing the wearer to harmful airborne contaminants, such as asbestos fibers.

Regular checks are necessary due to factors such as facial hair, changing face shapes, or movement that can affect the seal and performance of the respirator. Conducting a fit check before using the respirator helps identify any problems that could render the protective equipment ineffective, thus ensuring proper use and maximum safety on the job.

Although other options suggest varying frequencies, none provide the same level of safety assurance as checking the fit before each use. This practice is a key aspect of personal protective equipment guidelines in environments where asbestos exposure is a concern.