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Respirable coal mine dust: Geometric mean exposures by state, MSHA inspector and mine operator samples, 1979-2003


REL - recommended exposure limit    mg/m3 - milligrams per cubic meter    MRE - Mining Research EstablishmentNote: The NIOSH REL of 1 mg/m3 MRE for respirable coal mine dust was adopted in September of 1995. Geometric means are reported in MRE equivalent. See appendices for source description, methods, and agents.

Source: MSHA coal mine inspector and mine operator dust data.

Reference Number: 2008-296

Date Posted: June 2008

Archived Version