NORWALK, CA - Fed-OSHA has reopened the record for the respiratory protection standard in order to receive public comments on a report by Mark Nicas, Ph.D., related to assigned protection factors for the various respirator classes. Nicas prepared the analysis and report under contract with OSHA. It was entered as a post-hearing comment into the record as Exhibit #156.Because the post-hearing briefing period ended on October 20, OSHA is giving the public extra time to comment on the Nicas Report and i
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