Evaluation of a Dust Control for a Small Slab-Riding Dowel Drill for Concrete Pavement

The Annals of Occupational Hygiene
Alan S Echt, Kenneth Mead

Abstract

To assess the effectiveness of local exhaust ventilation to control respirable crystalline silica exposures to acceptable levels during concrete dowel drilling. Personal breathing zone samples for respirable dust and crystalline silica were collected while laborers drilled holes 3.5 cm diameter by 36 cm deep in a concrete slab using a single-drill slab-riding dowel drill equipped with local exhaust ventilation. Data were collected on air flow, weather, and productivity. All respirable dust samples were below the 90 µg detection limit which, when combined with the largest sample volume, resulted in a minimum detectable concentration of 0.31 mg m(-3). This occurred in a 32-min sample collected when 27 holes were drilled. Quartz was only detected in one air sample; 0.09 mg m(-3) of quartz was found on an 8-min sample collected during a drill maintenance task. The minimum detectable concentration for quartz in personal air samples collected while drilling was performed was 0.02 mg m(-3). The average number of holes drilled during each drilling sample was 23. Over the course of the 2-day study, air flow measured at the dust collector decreased from 2.2 to 1.7 m(3) s(-1). The dust control performed well under the conditions of this t...Continue Reading

References

Mar 2, 2002·Applied Occupational and Environmental Hygiene·Kenneth D Linch
May 1, 2004·American Journal of Public Health·David J ValianteEdward Socie
Apr 11, 2009·Journal of Occupational and Environmental Hygiene·William A Heitbrink, Javier Santalla-Elias

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Citations

Jun 9, 2017·Annals of Work Exposures and Health·Paul CartyDavid Rempel

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