Exposure Point is the location where exposure occurs. Which best describes it?

• A. Receptor Population
• B. Exposure Point
• C. Source
• D. Emission

Answer: (B)

Exposure assessment hinges on identifying where contact with a contaminant occurs. The exposure point is that exact location where exposure happens—such as the breathing zone for inhalation, the surface or mouth for ingestion, or the skin contact area for dermal exposure. It is the point in space and time where a receptor actually comes into contact with the contaminant.

This is different from the source, which is where the contaminant originates; from emission, which describes the release of the contaminant; and from the receptor population, which are the people or organisms that could be exposed. So the statement that Exposure Point is the location where exposure occurs fits the concept precisely.