In early September, OSHA issued a proposed rule that will limit permissible exposure to 50 micrograms of respirable crystalline silica per cubic meter of air. (See September 9, 2013 post.) This is approximately half of the current limit observed by industry. According to the U.S. Geological Survey, silica sand is used in approximately

Last week, the Occupational Safety and Health Administration (OSHA) proposed a rule to decrease the permissible exposure limits (PELs) for crystalline silica. OSHA indicated that the inhalation of silica dust can increase workers’ risk of silicosis and other diseases. Silica is commonly used as a proppant in hydraulic fracturing.
Continue Reading OSHA Proposes Silica Rule Affecting Fracking Workers