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654 Lead Safety in General Industry
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Fit Testing

Where daily airborne exposure to lead exceeds 50 µg/m3, affected workers must don respirators before entering the work area and should not remove them until they leave the high-exposure area or have completed a decontamination procedure.

Fit tests are required to ensure proper respirator fit.

Employers must assure that the respirator issued to the employee is selected and fitted properly to ensure minimum leakage through the facepiece-to-face seal.

Fit testing is a procedure used to determine how well a respirator "fits"-that is, whether the respirator forms a seal on the user's face. Before any employee first starts wearing a respirator in the work environment, the employer must perform a respirator fit test. For all employees wearing negative or positive pressure tight-fitting facepiece respirators, the employer must perform either qualitative or quantitative fit tests using an OSHA-accepted fit testing protocol. In addition, employees must be fit tested whenever a different respirator facepiece is used, and at least annually thereafter.

If an employee has difficulty in breathing during a fit test or while using a respirator, the employer must make a medical examination available to that employee to determine whether he or she can wear a respirator safely.

Knowledge Check Choose the best answer for the question.

3-6. What action must an employer take if an employee has difficulty in breathing during a respirator fit test?