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Occupational exposures to fibers and quartz at 19 crushed stone mining and milling operations.

Authors
Kullman-GJ; Greife-AL; Costello-J; Hearl-FJ
Source
Am J Ind Med 1995 May; 27(5):641-660
NIOSHTIC No.
00227440
Abstract
Occupational exposures to fibers and quartz at crushed stone mining and milling operations were examined via cross sectional exposure assessment. Exposures to respirable dust, total dust, crystalline silica (14808607), asbestos (1332214), and mineral fibers were measured at 19 crushed stone operations in the United States. A stratified sample of operations was randomly selected by rock type (granite, limestone, traprock, or sandstone). Mineral fibers were detected at several facilities; fibers included serpentine (12001295), tremolite (77536686), hornblende (12178426), olivine, and magnesite (546930). Asbestos fibers were found only at one traprock facility. All sample measurements were below the Mine Safety and Health Administration permissible exposure limits for fibers; two of ten samples, however, exceeded NIOSH recommended exposure limits. A variety of silicate mineral fibers were detected in traprock operations and at one granite operation. Crystalline silica was detected at 17 of the studied facilities; significant overexposures were measured at the majority of these crushed stone operations. Job exposure zones with the most frequent and highest overexposures to crystalline silica included mill operators, mill laborers, and truck drivers. The authors conclude that many crushed stone quarries and mills present a significant silicosis hazard as well as a potential lung cancer risk.
Keywords
NIOSH-Author; Asbestos-fibers; Dust-exposure; Exposure-levels; Occupational-exposure; Mining-industry; Milling-industry; Industrial-hygiene; Respirable-dust; Stone-processing; Occupational-respiratory-disease; Silica-dusts; Mineral-dusts; Industrial-medicine; Author Keywords: crystalline silica; quartz; crushed stone mining; fibers; asbestos; occupational exposure
Contact
Gregory J. Kullman, Environmental Investigations Branch, Division of Respiratory Disease Studies, NIOSH, Centers for Disease Control and Prevention, 1095 Willowdale Rd., Morgantown, WV 26505-2845
CODEN
AJIMD8
CAS No.
14808-60-7; 1332-21-4; 12001-29-5; 77536-68-6; 12178-42-6; 546-93-0
Publication Date
19950501
Document Type
Journal Article
Fiscal Year
1995
NTIS Accession No.
NTIS Price
Issue of Publication
5
ISSN
0271-3586
NIOSH Division
DRDS
Source Name
American Journal of Industrial Medicine
State
WV
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