Proposed OHS Standard for Exposure to Crystalline Silica

September 2013

The Occupational Safety and Health Administration (OSHA) published a Notice of Proposed Rulemaking (NPRM) to set a new OHS standard for exposure to Crystalline Silica.

Information for submitting comments and participating in a public meeting are posted at: The NPRM notes four specific questions related to the silica risk assessment contained in the preamble to the proposed rule.

Worker drilling into concrete on highway construction site. Drilling dry can release large amounts of respirable crystalline silica into the work area of the construction workers.