What is the permissible exposure limit (PEL) for asbestos exposure?

The permissible exposure limit (PEL) for asbestos is regulated to protect workers from the health hazards associated with asbestos exposure. In many countries, and specifically under OSHA regulations in the United States, the PEL for asbestos is set at 0.1 fibers per cubic centimeter of air, averaged over an 8-hour work shift. This limit is quite strict due to the serious health risks associated with asbestos, including lung cancer, asbestosis, and mesothelioma.

The selected answer correctly reflects that there is a regulated limit for asbestos exposure, while other options either present incorrect values or imply a lack of regulation, which is incorrect as asbestos is indeed regulated due to its harmful impact on worker health. Understanding these limits is crucial for ensuring safe workplace conditions and adhering to legal safety requirements.