This document recommends a set of age groupings based on current understanding of differences in lifestage behavior and anatomy and physiology that can serve as a starting set for consideration by Agency risk assessors and researchers. In specific situations, it is recognized that exposure factors data may not be available for many of the recommended age groupings or that a specific age group may not need to be the subject of a particular assessment, so flexibility and professional judgment are essential in applying these generic age groupings.
- Guidance on Selecting Age Groups for Monitoring and Assessing Childhood Exposures to Environmental Contaminants (PDF)(50 pp, 397 K, November 2005, 630-P-03-003F)