Respirable Crystalline Silica Standard for Construction

Important Update

Employer obligations under the new Respirable Crystalline Silica standard for construction, found in Title 8 section 1532.3 of the California Code of Regulations, were scheduled to commence on June 23, 2017. However, Cal/OSHA will not enforce those obligations until September 23, 2017. This synchronizes with federal OSHA's plan to delay enforcement of their corresponding standard.

In contrast, unlike federal OSHA, Cal/OSHA's new permissible exposure limit for respirable crystalline silica of 0.05 milligrams per cubic meter (0.05 mg/M3), found in Title 8 section 5155, Table AC-1, already went into effect on October 17, 2016. In addition, employers must continue to meet the requirements of Title 8 section 1530.1 to control employee exposures to dust created by operations conducted on concrete or masonry materials.

Revised April 19, 2017