D. Fit Testing 1. Each individual who must wear a respirator shall be fit tested by a qualified individual, and a respirator which fits each individual shall be available. Individuals shall conduct positive and negative pressure fit test checks each time a respirator is donned to assure proper protection. The fit is considered satisfactory if a slight pressure can build up inside the facepiece without air leaking. Close off the inlet openings of the cartridge by covering them with the palm of the hand.
Some respirators require that the filter holder be removed to seal off the intake valve.
Inhale gently so that a vacuum occurs within the facepiece. Hold your breath for about 5 seconds. If the vacuum remains, and no inward leakage is detected, the respirator is properly fit. E. Cleaning and Disinfection 1. Remove all filters, cartridges, and head-bands and disassemble the major respirator parts.