What is the primary function of a walk-through survey during sampling?

The primary function of a walk-through survey during sampling is to collect information about tasks, process flow, and sources of contaminants. This initial assessment is essential for understanding the workplace environment before any actual sampling takes place. During the walk-through, practitioners observe operations, workplace layout, and potential hazards, which helps identify areas of concern and potential contaminant sources. This information is crucial for planning effective sampling strategies tailored to the specific conditions of the workplace.

Gathering detailed knowledge about the tasks being performed and how processes interact allows hygienists to prioritize sampling locations and select appropriate sampling methods. This proactive approach ensures that subsequent sampling is comprehensive and focuses on areas where exposure risks are highest. It sets the stage for a more effective occupational hygiene assessment, making it easier to pinpoint and address specific hazards.

While taking physical samples, analyzing previous results, and summarizing health risks are important components of an overall occupational hygiene program, they are secondary to the foundational understanding gained through a thorough walk-through survey.