The National Center for Environmental Assessment (NCEA) of the U.S. Environmental Protection Agency (EPA) sponsored a two-day peer consultation workshop, entitled Peer Consultation Workshop on Approaches to Polycyclic Aromatic Hydrocarbon (PAH) Health Assessment on October 24-25, 2001, in Arlington, Virginia. The objectives of the workshop were to: (1) evaluate the extent to which each of the three available approaches to PAH health risk assessment is supported by the current scientific literature; and (2) assess how well each approach addresses the range of exposure situations and monitoring data encompassed by EPA program offices. The workshop focused on the extensive carcinogenicity literature for PAHs. Ten experts in polycyclic aromatic hydrocarbon (PAH) toxicology and chemistry, and risk assessment of chemical mixtures, provided their individual opinions on existing approaches and recommended additional analyses and research; consensus was not required. Dr. Joe Mauderly served as chairperson and moderator. Versar, Inc., provided logistic support and prepared a summary report of the proceedings.