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Evaluation of Silica Exposures During Drywall Sanding [HHE-2019-0179-3365]
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2019/12/01
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Source: Cincinnati, OH: U.S. Department of Health and Human Services, Public Health Service, Centers for Disease Control and Prevention, National Institute for Occupational Safety and Health, HHE 2019-0179-3365, 2019 Dec; :1-30
[PDF-688.71 KB]
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Description:The Health Hazard Evaluation Program received a request from the management of a drywall finishing company concerned with employee exposure to respirable crystalline silica during drywall-sanding activities. Our site visit consisted of observing work processes and practices, measuring the air velocity in the vacuum hose, collecting air samples for respirable crystalline silica and respirable dust, and collecting bulk samples of sanding dust to determine its silica content. Our air sampling found overexposures to respirable dust, but no overexposures to respirable crystalline silica. However, there could be overexposures to respirable crystalline silica if sanding was performed for the entire day. Vacuums were sometimes used without a disposable bag and without emptying the vacuum canister before it was used at the start of the work shift. Sometimes vacuum filters were removed and tapped on the trash bin to dislodge dust. Although the company had a voluntary respiratory protection program, employees were not wearing their respirators correctly. We recommended the company conduct additional personal air sampling for respirable dust and silica as multiple days of sampling in a variety of work sites will provide more information about potential respirable dust exposures. We recommended improving vacuum care and maintenance practices including establishing clear guidelines for when to empty the vacuum, replace the vacuum cleaner bags, and replace filters. We also recommended the company strengthen their voluntary respiratory protection program.
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Pages in Document:30 pdf pages
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Contributor:Booher, Donald E.;Ehlers, Josie;Hamilton, Cheryl;Moore, Kevin;Tyrawski, Jennifer;
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NIOSHTIC Number:20058165
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NTIS Accession Number:PB2020-100144
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Citation:NIOSH [2019]. Evaluation of silica exposures during drywall sanding. By Grant MP, Echt A, Echt;H. Cincinnati, OH: U.S. Department of Health and Human Services, Centers for Disease Control;and Prevention, National Institute for Occupational Safety and Health, Health Hazard Evaluation Report 2019-0179-3365,;
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Federal Fiscal Year:2020
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Peer Reviewed:False
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Resource Number:HHE-2019-0179-3365
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