Document GKkkL8nzGqxkJOk5mrbQMbY9v

SPECIAL DEFIN ASBESTOS GLOSSARY Ahera Asbestos Hazard Emergency Response Act Federal legislation regulating asbestos in schools. Enacted October 30,1987 Air Monitoring The process of measuring the airborne fiber concentration of a specific quantity of air over a given amount of time. Algorithm A universally accepted procedure de veloped for the purpose of solving a particular problem Ambient Air The surrounding air or atmosphere in a given area under normal conditions Amended Water Water to which a chemical wetting agent (surfactant) has been added to improve penetration into asbestos-containing materials that are being removed Asbestos Fibers Fibers with their length being greater 4 that five microns (lenght to width ratio of 3:1), generated from an asbestoscontaining material "Blue Book" EPA publication of March 1983 titled, "Guidance for Controlling Friable Asbestos -Containing Materials in Buildings" Bridging Encapsulant The application of a sealant over the surface of asbestos-containing material to prevent the release of asbestos fibers Chrysotlle (white asbestos) The only asbestiform of the serpentine variety which contains approximately 40% each of silica and magnesium oxide. It is the most common form of asbestos used in buildings Cancer A cellular tumor which normally leads to premature death of its host unless con trolled Asmosite An asbestiform of the amphibole group containing approximately 50% silica and 40% iron (II) oxide, and is made up of straight, brittle fibers, light gray to pale brown in color Carbon Monoxide A highly toxic colorless and odorless gas Ceiling Concentration The maximum allowable level of toxic material that can be present at any given point in time Amphibole One of the two major varieties of rock from which the asbestiform minerals are derived, distinguished by their chain like crystal structure and chemical compo sition Approved Landfill A site for the disposal of asbestos-con taining and other hazardous wastes that has been given EPA approval Asbestiform Fibrous materials which, due to their crystal structures and chemical compo sition, can be classified as a form of asbestos Asbestos A generic name given to a number of naturally occurring hydrated mineral sili cates that possess a unique crystalline structure, are incombustible in air, and are separable into filaments Cementitious CFM CIH Clean Room Clearance Air Sampling Asbestos-containing materials that are densely packed and nonfriable Cubic feet per minute An industrial hygienist who has been granted certification by the American Board of Industrial Hygiene The first stage of the decontamination enclosure system in which workers pre pare to enter the work area Air sampling done at the end of an abatement job to determine if airborne fiber counts are at or below levels specified in the contract Generally, a contractor is not released nor can buildings be reoccupied until fiber counts meet specified levels VPD-189-0000775