Asbestos: Sources and Potential Exposure
• Airborne exposure to asbestos may occur through the erosion of natural deposits in asbestos-bearing rocks, from a variety of asbestos-related industries, or from clutches and brakes on cars and trucks. The concentrations in outdoor air are highly variable.
• Asbestos has been detected in indoor air, where it is released from a variety of building materials such as insulation and ceiling and floor tiles. It is only released, however, when these building materials are damaged or disintegrate. Typical concentrations in indoor air range from 1 to 200 nanograms per cubic meter (ng/m3) (0.000001 to 0.002 milligrams per cubic meter (mg/m3)).
• Asbestos may be released to water from a number of sources, including erosion of natural deposits, corrosion from asbestos-cement pipes, and disintegration of asbestos roofing materials with subsequent transport into sewers.Courtesy of the EPA
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