An overview of the US EPA's multiple pathway exposure methodology

摘要

Th eUS Environmental protection Agency's National Center for Environmental Assessment is finalizing its updated approach to assessing the health risks form direct and indirect exposure to combustion emissions. The prior 1990 Indirect Exposure Methodol- ogy has been used frequently in the early part of this decade, while the new methodology considers more pathways for agent transfer and exposure. This advanced methodology is not limited to exposure form combustion emissions as the approach lends itself to assessing indirect exposure to other agents in various exposure scenarios.