What is the OSHA standard for permissible exposure limit (PEL) for coal dust?

The Occupational Safety and Health Administration (OSHA) has established permissible exposure limits (PELs) to protect workers from the harmful effects of various substances, including coal dust. For respirable coal dust specifically, the permissible exposure limit is set at 2.4 mg/m³. This limit is designed to minimize the risk of respiratory diseases such as pneumoconiosis, which can be caused by inhaling fine coal particles over time.

Setting this standard reflects extensive research on the health impacts of coal dust exposure and necessitates compliance by mining operations to maintain air quality and protect workers' health. Adherence to the PEL helps ensure that the exposures are within safe limits, thereby reducing the incidence of health-related issues stemming from coal dust exposure.