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NIOSH testimony on the Occupational Safety and Health Administration's final rule on occupational exposure to asbestos, tremolite, anthophyllite, and actinolite by J. D. Millar, December 1, 1987.
NIOSH 1987 Dec; :1-4
This testimony contained a letter from J. D. Millar which discussed an epidemiologic study by NIOSH the purpose of which had been to examine the mortality of miners employed by the R. T. Vanderbilt Company, Gouverneur Talc Company Mine and Mill number 1. These miners were exposed to tremolite (14567738) and anthophyllite (17068789). Based on internal and external reviews of the study at this point, it was decided not to proceed since there would be insufficient statistical power to render conclusive results. The study would also not have contributed new information concerning the environmental characteristics of the talc (14807966) from the Gouverneur Talc District. Therefore this letter indicated that the position of NIOSH on the fibrosity of this talc would remain unchanged. The definition of asbestos used by NIOSH was restated. It is recommended that for regulatory purposes this definition be used in the current asbestos standard (29 CFR 1910.1001). This testimony also contained a copy of an earlier letter, from R. E. Glenn, which stated that further analysis of the mortality data of the cohort was to be suspended until sufficient power was obtained to render results which were clearly interpretable.
NIOSH-Author; NIOSH-Testimony; Millar-J-D; Regulations; Asbestos-workers; Mining-industry; Airborne-fibers; Pulmonary-system-disorders; Asbestos-mining
14567-73-8; 17068-78-9; 14807-96-6
NTIS Accession No.
National Institute for Occupational Safety and Health
Page last reviewed: April 12, 2019
Content source: National Institute for Occupational Safety and Health Education and Information Division