This guidebook was produced with funds from the U.S. Environmental Protection Agency under grant no. 828862-01

The contents of this document do not necessarily reflect that agency’s views or policies. This guidebook was produced with support also from the Environmental Health Center’s parent organization, the National Safety Council, a not-for-profit, nongovernmental public service organization.

This guide benefited substantially from prepublication review by a range of experts, but their review does not necessarily connote their or their organizations’ endorsement of or support for all aspects of this guide.