Climate Change – Characterization of Black Carbon and Organic Carbon Air Pollution Emissions and Evaluation of Measurement Methods Phase I: Method Intercomparison Volume I: Interim Report DRI Contract Number: 04-307 Submitted to: Nehzat Motallebi, Ph.D. California Air Resources Board Research Division 1001 I Street Sacramento, CA 95812 Prepared for: The California Air Resources Board and the California Environmental Protection Agency By: Judith C. Chow, Sc.D. John G. Watson, Ph.D. Prakash Doraiswamy, Ph.D. L.-W. Antony Chen, Ph.D. David A. Sodeman, Ph.D. Steven Sai Hang Ho, Ph.D. Steven D. Kohl, M.S. Dana L. Trimble, B.S. Hal Voepel, M.S. Desert Research Institute Nevada System of Higher Education 2215 Raggio Parkway Reno, NV 89512 Kochy K. Fung, Ph.D. Atmoslytic, Inc. 24801 Alexandra Ct. Calabasas, CA 91302 7/10/2006