Respirator Protection Manual

18 Respiratory Protection Program Definitions Acid Gas Cartridge A respirator cartridge offering protection against acid gases such as sulfur dioxide, hydrochloric acid, hydrogen bromide, etc. (Note: Not all acid gases are removed by this cartridge. Consult with EH&S for limitations). Air-Line Respirator: (Type C supplied air respirator) The air-line respirator is connected to a suitable compressed air source, which is delivered continuously or intermittently (pressure-demand). Typically, this respirator type does not filter air, but rather supplies clean air from a source outside the work area. Air Purifying Respirator A respirator employing filters or cartridges to remove gases, mists, and/or particles from air (as opposed to air-supplying respirators). Dust Mask (dust/mist respirator) A respirator that filters dusts and mists but not gases (vapors). A dust mask not rated as HEPA may not filter out small dust particles such as tobacco smoke (0.01 - 1.0 micron diameter) or insecticide dust (approximately 0.5 - 10.0 micron diameter) and cannot be used for asbestos or lead related exposures. Full-Face Respirator A respirator that fits over the eyes, nose and mouth, having a clear facepiece. Typically negative air purifying, but includes SCBA and air-line respirators as well. Half-Face Respirator An air purifying respirator that fits over the mouth and nose, but not the eyes. Typically a negative air purifying respirator. HEPA Filter Cartridge A respirator cartridge that offers respiratory protection against airborne particulate matter including dusts, mists, metal fumes, and smokes; but not gases, vapors, or oxygen deficiency. Many HEPA filters are rated to capture over 99% of particles 0.3 microns in diameter or larger. HEPA filters and/or cartridges are typically used for protection against airborne asbestos, lead, radionuclides and other small diameter particulate air contaminants. HEPA cartridges are color coded with a purple/pink band. Immediately Dangerous to Life or Health Immediately Dangerous to Life or Health represents the maximum air contaminant level to which a healthy individual can be exposed for 30 minutes without suffering irreversible health effects or impairing symptoms that could inhibit escape from the contaminated environment. Air purifying respirators cannot be used in atmospheres above the Immediately Dangerous to Life or Health of a contaminant. Negative Air-Purifying Respirator A respirator that fits tightly against the face and relies on inhalation to bring air across filter and/or cartridges that remove air contaminants.