OSHA seeks to tighten standards related to silica exposure

The new permissible exposure limit to crystalline silica per cubic meter of air could be changed from 250 micrograms to 50 micrograms, under a proposal from the Occupational Safety and Health Administration, according to these reports. Under the construction provision, companies would be required to restrict worker access in areas where silica levels exceed PEL, and would be required to employ dust-control methods, said OSHA chief David Michaels. "Exposure to silica can be deadly, and limiting that exposure is essential," said Michaels.

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