What is the short-term exposure limit (STEL) in relation to exposure duration for workers?

The short-term exposure limit (STEL) is defined as a 15-minute time-weighted average exposure that is not to be exceeded during any part of a workday. It is primarily established to protect workers from acute effects of exposure to hazardous substances that might occur from quick bursts of high concentration, ensuring safety and health in environments where such exposures can occur.

This limit is particularly important in scenarios where workers may be exposed to potentially harmful substances in brief but intense periods. Keeping the duration short at 15 minutes allows for monitoring and controlling exposure effectively while minimizing possible adverse health effects, making it a critical benchmark in workplace safety regulations. Understanding STEL is essential in managing occupational exposure limits and ensuring that protective measures are in place for all workers.