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Description:Following preliminary, walk-through, industrial hygiene surveys of seven U.S. plants in which methylene chloride is used, three facilities were selected for further surveying of human exposures to the chemical. Ninety-four full-shift personal samples for methylene chloride covering workers in 19 job classifications, and area samples of 19 different sites at these three facilities were collected and analyzed. The findings were reported separately for the three plants. This report consolidates the findings for the individual plant surveys. The report includes--in addition to backgrotllld information on production and uses, toxicity and human exposure standards, and production processes--descriptions of operations and jobs, exposure control efforts, health and safety programs, air sampling data collected, summary tables of worker exposure levels to methylene chloride and associated substances (acetone, methanol, coffee dust, and ammonia), sampling and analytical procedures and methods, evaluation of findings, and recommendations. Results of the survey showed time-weighted-average personal exposures for normal operations ranging from 0.3 to 561 ppm--four samples, at one plant, above 500 ppm and one sample, at another plant, above 200 ppm. Exposures to the other substances surveyed were all below current permissible levels. The authors recommend that the OSHA standard for methylene-chloride be lowered to 75ppm.
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Pages in Document:55 pdf pages
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NIOSHTIC Number:00102914
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NTIS Accession Number:PB81-167876
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Citation:Cincinnati, OH: U.S. Department of Health and Human Services, Public Health Service, Centers for Disease Control, National Institute for Occupational Safety and Health, DHHS (NIOSH) Publication No. 80-131, 1980 Aug; :1-47
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Federal Fiscal Year:1980
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Performing Organization:SRI International
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Peer Reviewed:False
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Source Full Name:National Institute for Occupational Safety and Health
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Resource Number:DHHS (NIOSH) Publication No. 80-131;IWS-101-03;
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[PDF-15.11 MB]
