Silica Rule

With OSHA's new Silica Rule for roadway construction activies now being enforced, companies engaged in roadway construction must be aware of the potential for exposure to silica associated with common roadway construction activities, mitigation strategies and technologies, and reporting, monitoring, and other regulatory obligations. Thanks to the decade of work by the Silica/Asphalt Milling Machine Partnership, use of OSHA-approved engineering control technologies can ensure compliance with the rule for roadway milling activities; however, other road construction and asphalt production activities may trigger the Silica Rule's monitoring and mitigation requirements. In addition, in June 2018, the Silica Rule for general industry comes into effect, which will have an impact on asphalt mix production facilities. NAPA will continue to update this site with relevant resources as they are developed.


The following resources can aid in assessing compliance obligations and managing Silica Rule obligations:



For more information, contact Dr. Howard Marks, NAPA Vice President for Environment, Health & Safety.