Definitions for "Hazardous atmosphere"
An atmosphere that may expose employees to the risk of death, incapacitation, impairment or acute illness from one or more of the following causes: Flammable gas, vapor, or mist in excess of ten percent of its lower flammable limit; Airborne combustible dust at a concentration that meets or exceeds its lower flammable limit (dust obscures vision at a distance of five feet or less); Atmospheric oxygen concentration below 19.5 percent or above 23.5 percent; Atmospheric concentration of any substance for which a dose or a permissible exposure limit is published and which could result in employee exposure in excess of its dose or permissible exposure limit; and/or Any other atmospheric condition that is immediately dangerous to life or health.
1. A combustible mixture of gases and/or vapours. 2. An explosive mixture of dust in air. hazardous (classified) location A location where fire or explosion hazards may exist due to flammable gases or vapours, flammable liquids, combustible dust, or easily ignitable fibers or flyings.
means an atmosphere presenting a potential for death, disablement, injury, or acute illness from one or more of the following causes: A flammable gas, vapor or mist in excess of 10% of its' lower flammable limit (LFL) An oxygen deficient atmosphere containing less than 19.5% oxygen by volume or an oxygen enriched atmosphere containing more than 23.5% oxygen by volume Airborne combustible dust at a concentration that meets or exceeds its LFL (airborne combustible dust which obscures vision at five feet or less) An atmospheric concentration of any substance for which a dose or a permissible exposure limit is published in Subpart G, Occupational Health and Environmental Control, or in subpart Z, Toxic and Hazardous Substances, which could result in an employee exposure in excess of its dose or permissible exposure limit, and that could cause death, incapacitation, impairment of ability to self-rescue, injury or acute illness. Any other atmospheric condition that is immediately dangerous to life or health (IDLH).