OSHA Hazardous Waste Sites: PPE Ensembles - Donning Procedures Mobile App
The "fit" or integrity of the facepiece-to-face seal of a respirator affects its performance.
How does it work?
A secure fit is important with positive-pressure equipment, and is essential to the safe functioning of negative-pressure equipment, such as most air-purifying respirators. Most facepieces fit only a certain percentage of the population; thus each facepiece must be tested on the potential wearer in order to ensure a tight seal. Facial features such as scars, hollow temples, very prominent cheekbones, deep skin creases, dentures or missing teeth, and the chewing of gum and tobacco may interfere with the respirator-to-face seal. A respirator shall not be worn when such conditions prevent a good seal. The workers' diligence in observing these factors shall be evaluated by periodic checks using the OSHA Hazardous Waste Sites: PPE Ensembles - Donning Procedures mobile app.