Plume 02
Plume 02 : (a) An area of chemicals in a particular medium, such as air or groundwater, moving away from its source in a long band or column. A plume can be a column of smoke from a chimney or chemicals moving with groundwater. [ATSDR, 1999: Online Glossary]; (b) A visible or measurable discharge of a contaminant from a given point of origin that can be measured according to the Ringelmann scale. [CARB, 2000: Glossary of Air Pollution Terms]; (c) An area of chemicals moving away from its source in a long band or column. A plume, for example, can be a column of smoke from a chimney or chemicals moving with groundwater. [New York Department of Health, 1999: Glossary of Environmental Health Terms]; (d) A plume is a visible smoke-like structure, which may contain pollutants emitted from an exhaust or smoke stack and released into the atmosphere. This elongated band of smoke has changing characteristics that vary with its local environmental conditions. These conditions may include the physical and chemical nature of the pollutant, weather conditions and downwind topography. [SHSU, 2000: Atmospheric Chemistry Glossary, attributed to World Press Review 41: 24 (1994); Journal of Applied Meteorology 33: 996-1016 (1994); and Air Quality by Thad Godish, pages 58-64 (1985)]; (e) (1) The cloud of steam or smoke that comes from a chimney stack and blows downwind. (2) The contaminated portion of groundwater that moves past a source of pollution. [SRA, 1999: Glossary of Risk Analysis Terms, attributed to Stephen L. Brown]; (f) (1) A visible or measurable discharge of a contaminant from a given point of origin. Can be visible or thermal in water, or visible in the air as, for example, a plume of smoke. (2) The area of radiation leaking from a damaged reactor. 3. Area downwind within which a release could be dangerous for those exposed to leaking fumes. [USEPA, 1997a: EPA Terms of Environment] [USDOE, 2000: RAIS Glossary]
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