Report prepared by Christian Seigneur, Prasad Pai, Jean-Francois Louis, Philip Hopke, and Daniel Grosjean." "Report prepared for the American Petroleum Institute." "We present in this report a critical review of existing modeling tools that are currently available for the development of source-receptor relationships for PM concentrations. This review addresses both source models and receptor models ... Because source models and receptor models are based on different conceptual approaches, our review addresses these two categories of models separately. However, the two approaches are treated together in our recommendations for PM modeling for the preparation of State Implementation Plans (SIP)"--Leaf E-1. "5 December 1997." Includes bibliographic references (R-1 - R-24) "CP015-97-1b."