30 Sep '13, 5am

Proposed Silica Dust Rule to Limit Exposure on the Job: #Sustainability

Forty-year-old caps on silica dust in construction and industry are to be slashed by OSHA. By Candace Pearson More than 640,000 American workers are exposed to excessive levels of respirable crystalline silica, according to OSHA. The U.S. Occupational Safety and Health Administration (OSHA) is proposing more stringent exposure limits for crystalline silica—dust particles produced by cutting or crushing stone products and a known cause of lung cancer and silicosis. Heightened standards are projected to save nearly 700 lives and prevent 1,600 new cases of silicosis per year, many in the construction or glass manufacturing industries. OSHA’s proposed permissible exposure limit (PEL) is 50 μg/m3 (micrograms of silica per cubic meter of air) averaged over an eight-hour day—a significant cut from the current 40-year-old limits (100 μg for general and maritime industries and 250 ...

Full article: http://www.buildinggreen.com/auth/article.cfm/2013/9/19/P...

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