When is a respiratory protection program required, and what do fit testing and medical evaluation involve?

Details / How it works

Under 29 CFR 1910.134, a respiratory protection program must be established and maintained by any employer whose employees use respirators to protect against harmful dusts, fogs, fumes, mists, gases, smokes, sprays, or vapors. The program must include written worksite‑specific procedures, respirator selection, medical evaluation, fit testing, training, and periodic program evaluation. The standard applies to General Industry (part 1910), Shipyards (part 1915), Marine Terminals (part 1917), Longshoring (part 1918), and Construction (part 1926).

Fit testing – Each employee must be fit‑tested with the specific make, model, style, and size of respirator they will use. Fit testing must be conducted prior to initial use and at least annually thereafter, and whenever a different respirator facepiece is used. The test verifies that the respirator achieves an adequate seal to the wearer’s face, ensuring that contaminated air does not leak into the breathing zone.

Medical evaluation – Before an employee is fit‑tested or required to use a respirator, the employer must provide a medical evaluation to determine the employee’s ability to wear the respirator safely. The evaluation is typically administered using a medical questionnaire or by a physical examination. Additional evaluations are required if an employee reports signs or symptoms related to their ability to use a respirator, if the workplace conditions change, or at the employer’s discretion.

Exceptions & edge cases

The respiratory protection standard does not apply to voluntary use of filtering facepieces (dust masks) where the employer has determined that no respirator is required for the task. However, for voluntary use of other respirators, the employer must still provide the information in Appendix D and ensure the respirator does not create a hazard. Employers are not required to implement the full written program for voluntary use of filtering facepieces. Medical evaluation and fit testing are not required for voluntary users of filtering facepieces.

Temporary exemptions may apply when effective engineering controls are being instituted. The standard explicitly states that the primary objective must be to prevent atmospheric contamination through accepted engineering control measures (e.g., enclosure, ventilation, substitution of less toxic materials). Respiratory protection is required only when such controls are not feasible or while they are being implemented.