What the standard requires
29 CFR 1910.134 requires employers to protect employees from breathing contaminated air whenever engineering and administrative controls cannot reduce airborne contaminants to permissible levels. When respirators are required by the employer, the full standard applies. When they're only worn voluntarily, a subset of requirements still applies (see below).
Required vs voluntary use
A respirator is required when it is used to protect against an airborne hazard the employer has identified through exposure assessment, an OSHA-mandated exposure level, or another substance-specific standard (lead, asbestos, silica, etc.). Required use triggers the entire 1910.134 program.
A respirator is voluntarily worn when the employer permits, but does not require, its use — usually for comfort. Voluntary use of a filtering facepiece (N95-style disposable) requires only that the employer provide Appendix D of the standard to the employee. Voluntary use of any elastomeric respirator (half or full-face) requires a written program, medical evaluation, and cleaning/maintenance procedures — nearly the full standard.
Written respiratory protection program
Site-specific, in writing, updated as necessary, and administered by a suitably trained program administrator. The program must include:
- Procedures for selecting respirators.
- Medical evaluations of employees required to use respirators.
- Fit testing procedures.
- Procedures for proper use in routine and reasonably foreseeable emergency situations.
- Procedures and schedules for cleaning, disinfecting, storing, inspecting, repairing, discarding, and otherwise maintaining respirators.
- Procedures to ensure adequate air quality, quantity, and flow of breathing air for atmosphere-supplying respirators.
- Training on hazards and respirator use.
- Procedures for regularly evaluating the effectiveness of the program.
Medical evaluation
Every employee required to wear a respirator must receive a medical evaluation before fit testing or first use. OSHA provides a mandatory questionnaire (Appendix C) that a licensed health care professional (PLHCP) reviews. If the PLHCP has concerns, they may require a physical exam or further testing. The PLHCP provides a written recommendation on the employee's ability to wear the respirator.
Medical evaluations must be provided at no cost to the employee, during working hours or at times convenient to the employee, and in a confidential manner. Follow-up evaluations are required when the employee reports symptoms, the PLHCP recommends, workplace conditions change, or an observed change in the employee's ability to use the respirator.
Fit testing
Tight-fitting respirators require a fit test before first use, whenever the user changes respirator model/size/facepiece, and at least annually. Fit tests can be qualitative (QLFT — pass/fail based on the wearer's response to a test agent) or quantitative (QNFT — numerical fit factor measurement). QLFT is only acceptable for half-face respirators used in atmospheres with an assigned protection factor of 10 or less; QNFT is required otherwise.
Employees with facial hair that interferes with the sealing surface of the face piece cannot be fit tested and cannot wear a tight-fitting respirator. Loose-fitting powered air-purifying respirators (PAPRs) are an alternative.
Employee training
Training is required before first use and at least annually. It must cover: why the respirator is necessary and consequences of improper fit or use, limitations and capabilities of the respirator, how to inspect, put on and remove, use, and check the seals, and how to recognize medical signs and symptoms that may limit or prevent effective use.
Common citations
- 1910.134(c)(1) — no written respiratory protection program.
- 1910.134(e)(1) — no medical evaluation.
- 1910.134(f)(2) — annual fit test not performed.
- 1910.134(k)(1) — inadequate employee training.
- 1910.134(d) — improper respirator selection for the hazard.
Documentation checklist
- Written respiratory protection program with named administrator.
- Exposure assessment records supporting respirator selection.
- Medical evaluation records (retained per 1910.1020 — 30 years).
- Fit test records: employee name, respirator make/model/size, date, protocol, results.
- Training records with date, content, and employee acknowledgment.
- Cleaning, storage, and inspection procedures.
- Voluntary-use Appendix D forms where applicable.
Common mistakes we see
- Buying respirators without doing an exposure assessment. The selection must be justified by the hazard.
- Skipping medical evaluation for "voluntary" N95 users. The Appendix D form must still be provided.
- Beards under tight-fitting respirators. No exceptions. Move the employee to a PAPR or a different task.
- Fit tests older than 12 months. Track expiration dates like you track certifications.
How CSPC helps
Our team performs exposure assessments, drafts written programs, coordinates PLHCP medical evaluations, and delivers on-site fit testing (QLFT and QNFT) as part of the Baseline Blueprint and ongoing Compliance Compass programs.