What is the excursion limit for asbestos exposure over a 30-minute period?

The excursion limit for asbestos exposure over a 30-minute period is established to protect workers from short-term spikes in asbestos fibers in the air, which can be more harmful than constant low-level exposure. The correct value is 1.0 f/cc, which refers to fibers per cubic centimeter.

This limit is significant because even short-duration exposure to higher concentrations of asbestos can lead to serious health risks, including respiratory diseases and cancers. By setting this limit at 1.0 f/cc, regulations aim to mitigate the risk of acute exposure while recognizing that lower limits may still be necessary for longer-term safety standards.

Understanding this limit is crucial for asbestos workers, as compliance with established guidelines ensures a safer working environment and reduces the potential for occupational illnesses.