Workers who manually grind concrete surfaces need better protection from crystalline silica dust, according to research from the University of Toledo in Ohio and the Center for Construction Research and Training in Silver Spring, MD.
Dust control methods, including general ventilation, local exhaust ventilation and wet grinding, reduced silica dust concentrations. However, no combination of factors or control methods brought the eight-hour exposure level to below the recommended level of 0.025 mg/m3, which study researchers said indicates the need for refined controls or respirators.
The study appeared in the December issue of the Journal of Occupational and Environmental Hygiene.
Dust control methods, including general ventilation, local exhaust ventilation and wet grinding, reduced silica dust concentrations. However, no combination of factors or control methods brought the eight-hour exposure level to below the recommended level of 0.025 mg/m3, which study researchers said indicates the need for refined controls or respirators.
The study appeared in the December issue of the Journal of Occupational and Environmental Hygiene.
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