Asbestos: Geometric mean exposures and percent exceeding designated occupational exposure limits by MSHA metal/nonmetal district and state, MSHA samples, 1979–2003 |
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- indicates incalculable field.PEL - permissible exposure limitREL - recommended exposure limitGM - geometric meanf/cc - fibers per cubic centimeterMSHA - Mine Safety and Health Administration |
Note: The MSHA PEL is 2 f/cc. The NIOSH REL is 0.1 f/cc. See appendices for source description and methods. |
Source: MSHA metal/nonmetal mine data. |
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Page last modified: June 23, 2008
Page last reviewed: June 23, 2008
Content Source: National Institute for Occupational Safety and Health (NIOSH)
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