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NIOSH Testimony on Air Quality, Chemical Substances, and Respiratory Protection Standards by J. D. Millar, March 1, 1990.
NIOSH 1990 Mar:8 pages
This testimony concerns the views of NIOSH regarding the Mine Safety and Health Administration (MSHA) proposed rule on permissible exposure limits; exposure monitoring, abrasive blasting; drill dust control; dangerous atmospheres; and prohibited areas for food and beverages. NIOSH continues to endorse the recommended exposure limit of 1 part per million (ppm) as a 15 minute short term exposure limit for nitrogen-dioxide (10102440). NIOSH supports MSHA in proposing an 8 hour time weighted average of 25ppm for nitric-oxide (10102439). NIOSH supports MSHA in proposing a limit of 35ppm as an 8 hour time weighted average (TWA) for carbon-monoxide (630080) and recommends that sulfur-dioxide (7446095) exposure be limited to monitoring be required on a periodic basis. NIOSH recommends that mine operators be required to establish a written exposure monitoring plan for each facility that outlines where area and personal samples should be taken, how many samples should be taken, and the implementation of the remaining portions of the proposed rule change. NIOSH supports the rules for abrasive blasting for both coal and metal/nonmetal mines and has identified several substitutive materials for silica sand that could be used in abrasive blasting.
NIOSH-Author; NIOSH-Testimony; Millar-J-D; Safety-practices; Safety-measures; Mining-industry; Air-quality-control; Airborne-dusts; Toxic-gases;
10102-44-0; 10102-43-9; 630-08-0; 7446-09-5;
NTIS Accession No.
NIOSH, 8 pages, 17 references
Page last reviewed: May 5, 2020
Content source: National Institute for Occupational Safety and Health Education and Information Division