respiratory protection apparatus Any of a group of devices that protect the respiratory system from exposure to airborne contaminants; usually a mask with a fitting to cover the nose and mouth
ozone depletion potential A factor that reflects the ozone depletion potential of a substance, on a mass per kilogram basis, as compared to chlorofluorocarbon-11 (CFC-11). Such factor shall be based upon the substance's atmospheric life time, the molecular weight of bromine and chlorine, and the substance's ability to be photolytically disassociated, and upon other factors determined to be an accurate measure of relative ozone depletion potential
