This report is the proceedings of a workshop convened to evaluate two new air quality receptor models, Positive matrix factorization (PMF) and UNMIX. The workshop was held in Research Triangle Park, NC during February 14-16, 2000 and was sponsored jointly by EPA's office of Research and Development and Office of Air Quality Planning and Standards. The workshop evaluation of PMF and UNMIX was accomplished by examining the results of applying both models to two ambient PM 2.5 data sets, one real and one synthetically generated. Both data sets were supplied in advance to a proponent of each model. The report briefly summarizes the technical exchange and major conclusions reached during the workshop.

Includes bibliographical references (p. 22-23). "PB2001-100353." "June 2000." Cover title. "Contract No. 68-D5-0049." "Project Officer: Portia Britt." "Work Assignment Manager: Charles W. Lewis."

This report is the proceedings of a workshop convened to evaluate two new air quality receptor models, Positive Matrix Factorization (PMF) and UNMIX. The workshop was held in Research Triangle Park, NC, during February 14-16, 2000 and was sponsored jointly by EPA's Office of Research and Development (ORD) and Office of Air Quality Planning and Standards (OAQPS). The workshop evaluation of PMF and UNMIX was accomplished by examining the results of applying both models to two ambient PM2.5 data sets, one real and one synthetically generated. Both data sets were supplied in advance to a proponent of each model (UNMIX: Dr. Ron Henry, University of Southern California; PMF: Dr. Phil Hopke, Clarkson University). Each brought to the workshop the results of independently applying their model to both data sets. The report briefly summarizes the technical exchange and major conclusions reached during the workshop.