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RESPIRATORY PROTECTION EQUIPMENT AVAILABLE, AND PROPER FITTING, USE, AND <br />~ CARE: <br />1. DUST MASKS <br />a. Fitting: Put mask on, and adjust to make as complete a face <br />seal as possible <br />b. Use/Care: Discard mask after use. Discard mask if at any time. <br />breathing resistance increases <br />2. AIR PURIFYING RESPIRATORS <br />a. Fitting: Air purifying respirators are negative pressure units. <br />Each time the wear breathes in, a vacuum is created <br />inside the mask/facepiece which draws air through the <br />filter elements. If an inadequate face seal exists, <br />this negative pressure will also draw outside, <br />contaminated air into the mask/facepiece. It is <br />essential that an adequate face seal exists when using <br />this type of equipment. <br />No employee will use an air-purifying type respirator <br />if any conditions exist which may prevent adequate <br />face seal. This can include facial deformities and <br />facial hair. <br />Prior to use of a negative pressure respirator system, <br />the user will have been properly fitted to an <br />appropriate unit by a qualified individual (e.g., <br />manufacturer/distributor representative). This fitting <br />may involve the use of qualitative and/or quantitative <br />fit testing procedures. <br />Prior to entering a contaminated atmosphere, all <br />wearers of negative pressure respirators will conduct <br />a"negative pressure test", a"positive pressure <br />test", and "odorous chemical challenge test". These <br />procedures are described in Appendix B.1. Respirators <br />will be adjusted until an acceptable face seal is <br />obtained. <br />b. Use: Air-purifying respirators are not to be used in Oxygen <br />deficient or IDLH conditions. The cartridge/canisters <br />must be approved for the air contaminants present, at <br />the concentrations present. <br />