Qualitative Fit Testing for Respirators OSHA Respiratory Protection Requirements OSHA mandates that employers provide respiratory protection for workers exposed to airborne contaminants. This includes: Personal protective equipment (PPE), such as respirators. Proper training on respirator use and maintenance. Fit testing to ensure a proper seal and prevent exposure to airborne allergens. A fit test is necessary to confirm that a respirator provides effective protection. Qualitative fit test methods use irritant smoke, taste aversion agents, and ...