Knowledge regarding health hazards from crystalline silica exposure and how to best safeguard exposed workers has evolved drastically over the past century. However, regulatory uncertainties and the fact that many workers are still overexposed to silica dust in the U.S. and abroad have led to calls for a comprehensive OSHA standard. Some labor groups and occupational safety advocates have even called for a ban on all types of abrasive blasting, including methods that do not use sand or silica, as a means to safeguard workers.
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