What is the 8-hour Time Weighted Average (TWA) for permissible exposure limit (PEL) of asbestos?

The permissible exposure limit (PEL) for asbestos is defined by regulatory standards to protect workers from the harmful effects of asbestos exposure. The 8-hour Time Weighted Average (TWA) is set at 0.1 fibers per cubic centimeter (F/CC) of air. This means that over an 8-hour workday, the average concentration of asbestos fibers in the air that a worker can be exposed to safely is 0.1 F/CC.

This limit was established based on health studies that demonstrated the risk of exposure to asbestos and the goal of minimizing the potential for serious long-term health effects, including asbestosis and mesothelioma. The value reflects a balance between necessary worker exposure for certain sectors while providing a threshold to protect their health.

Other values given in the options represent higher permissible exposure limits, which do not align with the established regulatory standards for asbestos exposure, thus making them incorrect in this context.