CFR 185A - Respirable Crystalline Silica

On March 25, 2016, OSHA revised Title 29 of the Code of Federal Regulations, Parts 1910, 1915 and 1926 to add new substance-specific standards for occupational exposure to respirable crystalline silica. Concomitantly, revisions were made to 29 CFR 1910.1000, Table Z-3, to 29 CFR 1915.1000, Mineral Dusts table, and to Appendix A of 29 CFR 1926.55 to reference the applicability of the existing permissible exposure limit for each part. These revisions resulted in an error in the formulas for calculating the crystalline quartz permissible exposure limit and threshold limits, respectively, in these standards. OSHA published a correction to these formulas on May 18, 2016 (Federal Register).

The N.C. Commissioner of Labor adopted this final rule with an effective date of September 2, 2016.