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Millie D


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November 14, 2014








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Since these products are primary materials for construction, construction workers may be easily exposed to respirable crystalline silica during activities such as the following: · Chipping, hammering, and drilling of rock · Crushing, loading, hauling, and dumping of rock · Abrasive blasting using silica sand as the abrasive · Abrasive blasting of concrete (regardless of abrasive used) · Sawing, hammering, drilling, grinding, and chipping of concrete or masonry · Demolition of concrete and masonry structures · Dry sweeping or pressurized air blowing of concrete, rock, or sand dust Even materials containing small amounts of crystalline silica may be hazardous if they are used in ways that produce high dust concentrations...
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This fibrotic condition of the lung is called silicosis. If the nodules grow too large, breathing becomes difficult and death may result. Silicosis victims are also at high risk of developing active tuberculosis [Myers et al. 1973; Sherson and Lander 1990; Bailey et al. 1974]. A worker's lungs may react more severely to silica sand that has been freshly fractured (sawed, hammered, or treated in a way that produces airborne dust) [Vallyathan et al...
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