OSHA and MSHA have updated their silica standards to enhance worker protection against Respirable Crystalline Silica. OSHA’s updated rule, effective from September 2017 for the construction industry and June 2018 for general and maritime industries, lowered the Permissible Exposure Limit (PEL) to 50 micrograms per cubic meter and the Action Level (AL) to 25 micrograms per cubic meter and introduced mandatory engineering controls and medical surveillance. MSHA’s rule, announced in April 2024, follows similar guidelines with staggered compliance deadlines set for 2025 for coal mines and 2026 for metal and nonmetal mines, emphasizing stringent dust controls and enhanced monitoring. These changes aim to significantly reduce health risks such as silicosis and lung cancer in affected industries.

At EI, our Industrial Hygiene services are designed to assist manufacturing, construction and mining industries in navigating the complexities of OSHA and MSHA regulations regarding Respirable Crystalline Silica. Our goal is to ensure that your operations not only meet regulatory standards but also foster a safe and healthy work environment.

Our industrial hygiene professionals utilize their advanced training to help your operations meet and exceed the stringent standards set forth by OSHA. Over the years, we have conducted comprehensive assessments to measure RCS exposure levels and have developed customized strategies for our clients. These strategies integrate advanced engineering controls and operational adjustments to effectively reduce silica exposures. In addition, our team is trained under MSHA Part 46 and 48, which equips us with the expertise to navigate the complexities of workplace hazards in mining effectively, particularly Respirable Crystalline Silica (RCS).

We at EI are dedicated to transforming regulatory challenges into opportunities for advancing workplace safety and operational efficiency. Our proactive and comprehensive approach to silica exposure monitoring is that your business not only meets regulatory standards but also leads in health and safety management.


When you use The EI Group, Inc., you are hiring true Industrial Hygiene professionals with a real world view and service that far exceeds industry norms. With EI reports, you get the information you need right away without all the fluff.

Brian Hughes

Corporate Division Safety Manager, Perdue Farms, Inc.