How many workers must wear sampling pumps if worker exposure sampling is required?

The requirement for one sampling pump per task per shift is based on ensuring that sufficient data is collected to accurately assess the exposure levels of workers during specific tasks. This approach allows for monitoring variations in exposure that may occur due to different activities or changes in conditions throughout the shift.

By concentrating on individual tasks, this method provides a clearer picture of potential risks associated with specific operations, helping to identify when and where workers might be exposed to harmful asbestos fibers. This thorough approach ensures compliance with safety regulations and better protects worker health.

In contrast, having just one pump for the entire project duration would not capture the variability of exposure conditions that can change from day to day or task to task. Using two pumps for every team of four workers could lead to unnecessary duplication of effort over and above what's required. Limiting sampling to just the initial assessment would not adequately account for ongoing exposure, which is crucial for maintaining safety standards throughout the project's duration.