What is the Excursion Limit (EL) for asbestos exposure over a 30-minute period?

The Excursion Limit (EL) for asbestos exposure is defined as the maximum allowable concentration of asbestos fibers in the air over a short duration, specifically a 30-minute period. The correct limit is set at 1.0 fibers per cubic centimeter (f/cc). This value is established to provide protection against the acute effects of high-level asbestos exposure that can occur during short bursts of activity or from specific work practices that might elevate fiber counts temporarily.

Setting this limit at 1.0 f/cc ensures that workers are protected against the risks associated with intermittent exposure, which can still contribute to significant health risks, including serious respiratory diseases. The standard is aligned with safety regulations aimed at minimizing harmful asbestos exposure in various occupational settings. Understanding these limits is vital for professionals in the field to ensure that they are complying with regulations and providing safe work environments.