July 30, 1999

EPA-SAB-CASAC-CON-99-007

Honorable Carol M. Browner
Administrator
U. S. Environmental Protection Agency
401 M Street, SW
Washington, DC 20460

             Subject:      Notification of a Consultation on the PM2.5 Chemical Speciation
                          Network and the Supersites Program Plan

Dear Ms. Browner:

       The Technical Subcommittee for Fine Particle Monitoring of the Clean Air Scientific
Advisory Committee (CASAC) of the Science Advisory Board (SAB) met via public
teleconference on July 29, 1999 to consult with staff of the offices of Air and Radiation and
Research and Development on data summaries from the PM2.5 speciation sampler
intercomparison study, the updated speciation guidance document, the Supersites Request for
Assistance (RFA), and the Atlanta and Fresno Supersites Plans. The  Subcommittee has planned
a formal meeting for late this calendar year to discuss this matter more fully.

       The SAB has developed the Consultation as a mechanism to advise the Agency on
technical issues that should be  considered in the development of regulations, guidelines, or
technical guidance before the Agency has taken a position. A Consultation is conducted under
the normal requirements of the Federal Advisory Committee Act, which include advance notice
of the public meeting in the Federal Register.

       As is our customary practice, there will be no formal report from the SAB as a result of
this consultation, nor do we expect any formal response from the Agency.

                                        Sincerely,
                                        Dr. Joe Mauderly, Chair
                                        Clean Air Scientific Advisory Committee
                                        Science Advisory Board

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                         U.S. Environmental Protection Agency
                                 Science Advisory Board
                 Clean Air Scientific Advisory Committee (CASAC)
Chair
Dr. Joe Mauderly, Director of External Affairs, Senior Scientist, Director of National Environmental
       Respiratory Center, Lovelace Respiratory Research Institute, Albuquerque, NM

Members
Mr. John Elston, Administrator, Office of Air Quality Management, State of New Jersey, Department of
       Environmental Protection and Energy, Trenton, NJ

Dr. Philip K. Hopke, Dean of the Graduate School, and R.A. Plane Professor of Chemistry, Clarkson
       University, Potsdam, NY

Dr. Eva J. Pell,, Steimer Professor of Agricultural Sciences, Pennsylvania State University, University
       Park, PA

Dr. Arthur C. Upton, M.D., Director, Independent Peer Review, CRESP, Environmental and
       Occupational Health Sciences Institute, Piscataway, NJ

Dr. Sverre Vedal, M.D., Professor of Medicine, University of British Columbia, Vancouver, BC, Canada

Dr. Warren White, Senior Research Associate, Washington University, Chemistry Department, St.
       Louis, MO

Science Advisory Board Staff
Mr. Robert Flaak, Designated Federal Official (DFO) and Team Leader, Committee Operations Staff,
       US Environmental Protection Agency, Science Advisory Board, Washington, DC

Ms. Diana Pozun, Management Assistant, US Environmental Protection Agency, Science Advisory
       Board, Washington, DC

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                         U.S. Environmental Protection Agency
                                 Science Advisory Board
                        Clean Air Scientific Advisory Committee
                          CASAC Technical Subcommittee for
                                Fine Particle Monitoring

Chair
Dr. Philip K. Hopke, Dean of the Graduate School, and R.A. Plane Professor of Chemistry, Clarkson
       University, Potsdam, NY

Members of CASAC
Dr. John Elston, State of New Jersey, Dept. Of Environmental Protection & Energy, Trenton, NJ

Dr. Warren White, Washington University, St. Louis, MO

Members of Other SAB Committees
Dr. Jo Ann Lighty, University of Utah, College of Engineering, Salt Lake City, UT (Member and Liaison
       from SAB Environmental Engineering Committee)

Dr. Morton Lippmann, Nelson Institute of Environmental Medicine, New York University, Tuxedo, NY
       (Member of the SAB Executive Committee)

Consultants to CASAC
Dr. Petros Koutrakis, Harvard University, Boston, MA

Dr. Debra Laskin, Environmental & Occupational Health Sciences Institute, Rutgers University,
       Piscataway, NJ

Dr. Peter H. McMurry, University of Minnesota, Department of Mechanical Engineering, Minneapolis,
       MN

Dr. Kimberly A. P rather,  Department of Chemistry, University of California-Riverside, Riverside, CA

Dr. Carl M. Shy, Department of Epidemiology, University of North Carolina at Chapel Hill, School of
       Public Health, Chapel Hill, NC

Dr. George T. Wolff, General Motors, Corporate Affairs, General Motors Bldg. Detroit, MI

Mr. Mel Zeldin, Monitoring and Analysis Division, South Coast Air Quality Management District
       (SCAQMD), Diamond Bar, CA

Science Advisory Board Staff
Mr. A. Robert Flaak, Designated Federal Officer, US EPA, Science Advisory Board (1400), 401 M
       Street, SW, Washington, DC

Ms. Diana Pozun, Management Assistant, US EPA, Science Advisory Board (1400), 401 M Street, SW,
       Washington, DC

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                                       NOTICE
       This report has been written as a part of the activities of the Science Advisory Board, a
public advisory group providing extramural scientific information and advice to the
Administrator and other officials of the Environmental Protection Agency. The Board is
structured to provide balanced expert assessment of scientific matters related to problems faced
by the Agency. This report has not been reviewed for approval by the Agency; and hence, the
contents of this report do not necessarily represent the  views and policies of the Environmental
Protection Agency or other agencies in the Federal government.  Mention of trade names or
commercial products does not constitute a recommendation for use.

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