When is a respirator "fit test" required?

A respirator "fit test" is essential for ensuring that the respirator forms a proper seal on the wearer's face and provides the necessary protection against airborne contaminants. This testing is mandatory before any required respirator use because a poorly fitted respirator can allow hazardous substances to enter, thereby compromising the safety of the wearer.

Fit tests can be performed in several scenarios, including initial training or before entering confined spaces; however, these are only specific instances. The critical point is that the testing must occur whenever a respirator is required for use, ensuring that the individual will receive the full protective benefit from the equipment in any situation involving exposure to contaminants. This broad requirement emphasizes the importance of maintaining safety standards consistently and ensures that any worker who needs to use a respirator has the right fit for optimal protection regardless of the specific circumstances.