The process of measuring or estimating the intensity, frequency, and duration of human exposures to an agent currently present in the environment or of estimating hypothetical exposures that might arise from the release of new chemicals into the environment.
A component of a risk assessment that characterizes the source and magnitude of human exposure to the hazard.
Determination of the sources, environmental transport and modification, and fate of pollutants and contaminants, including the conditions under which people or other target species, could be exposed and the doses that could result in adverse effects.