What type of sampling measures a worker's exposure directly?

The type of sampling that measures a worker's exposure directly is personal or occupational sampling. This method involves collecting air samples or biological indicators in close proximity to the worker during their regular activities. The goal is to accurately assess the exposure level to specific contaminants that an individual might face in their work environment. By measuring exposure directly at the source—essentially where the worker is while doing their job—personal sampling provides precise data that reflects the conditions that might affect their health. This method is crucial in occupational hygiene as it allows for tailored risk assessments and the implementation of appropriate control measures based on actual exposure levels.

In contrast, environmental sampling measures the concentration of contaminants in the surrounding environment but does not provide direct information about actual exposure experienced by an individual. Area sampling also focuses on ambient conditions rather than individual exposure. Static sampling, usually associated with monitoring fixed areas or equipment, does not consider the dynamic nature of workers' movements and tasks throughout the workday. Therefore, personal sampling is the most reliable method for understanding a worker's specific exposure and is essential for effective occupational health management.