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-/ AM November 14, 1991 �-- Beacon Station No. 492, Manteca, California Assuming that the respirator is properly fitted, in good.condition, free from leaks, and has the proper cartridges for the contaminant(s) present, the length of time the respirator will provide protection also depends on the conditions of use. The conditions of use include but are not limited to the following: o The concentration of contaminant(s) in the atmosphere o The temperature and humidity of the ambient atmosphere o Any previous use of the cartridges and filters o The elapsed time since the removal of the cartridges or filters from their protective packaging o The emotional state of the wearer o The level of physical activity of the wearer Cartridges designed and specified to protect the wearer against airborne particles are not appropriate for-protection against gases and vapors.. Cartridges designed and specified for protection against specific gases and vapors are not appropriate for protection against airborne particles or.other gases or vapors beyond the scope of that type of cartridge. Every cartridge is labeled with specific instructions defining the use and limitations of that particular type of cartridge. If the label is missing or the type of cartridge is inappropriate then it may not'be used under any circumstances; it will provide little or no protection to the wearer. Danger Signals Indicating Possible Respirator Failure If any of the danger signals in the-following list are experienced while wearing a respirator, immediately return to a fresh air environment. The ,cartridges or filters may be inappropriate or used up or abnormal conditions may be creating vapor concentrations which are beyond the limits of the cartridges or filters. Danger is indicated when the individual subject to exposure: o Smells or tastes chemicals, or if eyes, nose, or throat become irritated; -o Has difficulty breathing; 86102-7s 9