Assessment of potential risk levels associated with U.S. Environmental Protection Agency reference values.(Article) From: Environmental Health Perspectives | Date: August 1, 2003| Author: Castorina, Rosemary; Woodruff, Tracey J. | COPYRIGHT 2003 National Institute of Environmental Health Sciences. This material is published under license from the publisher through the Gale Group, Farmington Hills, Michigan.  All inquiries regarding rights should be directed to the Gale Group.Copyright information

The U.S. Environmental Protection Agency (U.S. EPA) generally uses reference doses (RfDs) or reference concentrations (RfCs) to assess risks from exposure to toxic substances for noncancer health end points. RfDs and RfCs are supposed to represent lifetime inhalation or ingestion exposure with minimal appreciable risk, but they do not indude information about the estimated risk from exposures equal to the RfD/RfC. We used results from benchmark dose modeling approaches recently ado...

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