Respiratory Protection Program: Complete OSHA Guide

The respiratory protection standard (29 CFR 1910.134) applies any time a worker uses a respirator in the workplace — whether required by OSHA or voluntary. The requirements are layered: before a respirator touches a worker's face, a written program must exist, a medical evaluation must be complete, and fit testing must be performed. Skipping any of these steps is a citation.

Engineering Controls First

OSHA's respiratory protection standard explicitly requires that respirators be used only when engineering controls are not feasible, while engineering controls are being installed, or in emergencies. This is the hierarchy of controls. Respiratory protection is a last resort — not a substitute for proper ventilation, process enclosure, or substitution of less hazardous materials. If a respirator program is your only control for a recognized airborne hazard, OSHA may cite you for failing to implement feasible engineering controls in addition to any respirator program violations.

When a Written Program Is Required

A written respiratory protection program is required whenever respirators are used in the workplace — with one exception: voluntary use of filtering facepieces (dust masks) only, when there is no OSHA requirement for respiratory protection and no hazardous atmosphere. Even then, employees must be provided with the information in Appendix D of the standard.

For all other respirator use — any tight-fitting respirator, any air-supplying respirator, or any situation where OSHA requires respiratory protection — a full written program is required.

Required Elements of the Written Program

The written program must address:

• Procedures for selecting respirators for use in the workplace
• Medical evaluations of employees required to use respirators
• Fit testing procedures for tight-fitting respirators
• Procedures for proper use of respirators in routine and reasonably foreseeable emergency situations
• Procedures and schedules for cleaning, disinfecting, storing, inspecting, repairing, discarding, and maintaining respirators
• Procedures to ensure adequate air quality, quantity, and flow for atmosphere-supplying respirators
• Training of employees in respiratory hazards and respirator use
• Procedures for regularly evaluating the effectiveness of the program

A program administrator must be designated — someone with the authority and knowledge to manage the program effectively. The program must be updated when workplace conditions change.

Medical Evaluation

Before any employee is fit tested or required to use a respirator, a medical evaluation must be completed. This requirement cannot be skipped, deferred, or replaced by assuming a worker is healthy enough to wear a respirator. Wearing a respirator — particularly a tight-fitting respirator — imposes physiological demands that can be dangerous for workers with certain heart, lung, or other conditions.

The medical evaluation process:

• The employee completes OSHA's medical questionnaire (Appendix C of 29 CFR 1910.134) or an equivalent questionnaire
• The questionnaire is reviewed by a physician or other licensed healthcare professional (PLHCP)
• The PLHCP provides a written recommendation on the employee's ability to use the respirator
• Employees must be given the opportunity to discuss the questionnaire with the PLHCP
• Medical evaluations are provided at no cost to employees, at a reasonable time and place, and the results are confidential

Additional medical evaluations are required if the employee reports medical signs or symptoms related to respirator use, the PLHCP or supervisor believes it's necessary, or workplace conditions change in a way that may increase physiological burden.

Types of Respirators

Assigned Protection Factors (APF)

Every respirator type has an Assigned Protection Factor — the minimum level of protection it provides when properly fitted and used. Match the APF to the hazard concentration:

To select the correct respirator: divide the measured or estimated airborne concentration by the permissible exposure limit (PEL). The result is the minimum required APF. Select a respirator with an APF at or above this number.

Fit Testing

All tight-fitting respirators — including N95s, half facepieces, and full facepieces — require fit testing before initial use and annually thereafter. Fit testing must also be performed when a different respirator facepiece is used, after significant weight change, or after facial changes that could affect the seal.

Two acceptable fit test methods:

Qualitative fit test (QLFT): Uses the employee's sense of smell or taste to detect if a challenge agent penetrates the seal. Acceptable for half facepieces used in atmospheres up to 10 times the PEL (APF 10). Agents include saccharin, Bitrex, isoamyl acetate, and irritant smoke.

Quantitative fit test (QNFT): Uses instruments to measure actual leakage through the facepiece seal. Required for all full facepieces and PAPRs, and optional for half facepieces. Generates a fit factor number — must achieve a fit factor of at least 100 for half facepieces and 500 for full facepieces.

Fit tests must be conducted by a trained person following OSHA's Appendix A protocols. Results must be documented and retained.

User Seal Check

Different from fit testing, a user seal check is performed by the employee each time they put on a tight-fitting respirator. It verifies the seal is adequate for that specific donning. Two methods:

• Positive pressure check: Cover exhalation valve(s), exhale gently, check for leakage around face seal
• Negative pressure check: Cover inhalation valve(s) or cartridge openings, inhale gently, facepiece should collapse slightly and hold without air leaking in

Cartridge Change Schedule

Air-purifying cartridges do not last indefinitely. They must be changed before breakthrough occurs. OSHA requires a change schedule based on:

• Objective information or data showing the maximum use time before breakthrough
• End-of-service-life indicators (ESLI) on the cartridge, if available
• If neither is available: change cartridges at the end of each shift, before each use if the cartridge has been stored after partial use, or immediately if the employee detects odor or taste

Common Respiratory Protection Violations