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Occupational exposure to respirable coal mine dust
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Occupational exposure to respirable coal mine dust
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    1. Recommendations for a coal mine dust standard -- 2. Introduction -- 3. Properties, production, and potential for exposure -- 4. Health effects of exposure to respirable coal mine dust -- 5. Environmental monitoring -- 6. Medical screening and surveillance -- 7. Basis for the recommended standard -- 8. Methods for protecting coal miners -- 9. Research needs -- References -- Publications examined -- Appendix A. Concentrations of Respirable Coal Mine Dust and Respirable Crystalline Silica in Underground and Surface Coal Mines -- Appendix B. Concentrations of Respirable Coal Mine Dust and Respirable Crystalline Silica in Samples Requited by 30 CFR 90 -- Appendix C. Optional Dust Control Techniques for Coal Mining Environments -- Appendix D. Methods for Controlling Respirable Coal Mine Dust from Overburden Drilling at Surface Coal Mines -- Appendix E. Interpretation of Pulmonary Function Tests: Spirometry -- Appendix F. NIOSH Occupational History Questionnaire from the Coal Workers’ X-ray Surveillance Program -- Appendix G. Technical Considerations in the Use of Spirometry in Screening and Surveillance of Mineral-Dust-Exposed Workers -- Appendix H. The Black Lung Benefits Program -- Appendix I. Confidence Limit on Minimum Accurately Quantifiable (MAQ) Concentration of Respirable Coal Mine Dust -- Appendix J. Variability in Sampling and Analytical Methods -- Appendix K. Estimates of Exposure Variability and Exposure Parameters for Selected Designated Occupations -- Appendix L. Validation of Predictions of Small Rounded Opacity Prevalence from Attfield and Morring [1992].

    Information regarding adverse health effects resulting from exposure to respirable coal mine dust was reviewed as a basis for the development of new occupational safety and health standards. Evidence indicated that coal mine dust exposures over a working lifetime may result in the development of simple coal workers' pneumoconiosis, progressive massive fibrosis, and chronic obstructive pulmonary disease. Based on epidemiology studies, a working lifetime exposure to levels of coal dust at the current Mine Safety and Health Administration permissible exposure limit of 2mg/m3 increased the risk of developing these disorders. When exposure also occurs to crystalline silica (14808607) at respirable size particles, the danger of developing silicosis or mixed dust pneumoconiosis was also present. NIOSH recommends in this report that the exposures to respirable coal mine dust be limited to 1mg/m3 as a time weighted average concentration for up to 10 hours a day during a 40 hour work week. Recommendations are provided concerning respirable coal mine dust sampling to monitor worker exposure, the proper use of personal protective equipment, and medical screening and surveillance examinations.

    NIOSHTIC No 00230308

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