May 30, 1997

      Document Released for Stakeholder Review and Comment

                 Comparison of Start Emissions
                in the LA92 and ST01 Test Cycles
                                
                          M6STE001.PDF

The Office of Mobile Sources, Assessment and Modeling Division,
announces the release of "Comparison of Start Emissions in the
LA92 and ST01 Test Cycles" for stakeholder review and comment. 
This document M6STE001.PDF is available at the MOBILE6 section of
the OMS Web Site (http://www.epa.gov/omswww/models.htm).

This document reports on a comparison of start emissions for the
two test cycles using data from a sample of five vehicles tested
at the EPA National Vehicle and Fuel Emissions Laboratory in Ann
Arbor, Michigan. The purpose of the analysis is to determine if,
during the start portion of the cycles, there is a significant
difference between the cycles in their emissions attributable to
a cold start condition.

Comments on this report and its proposed use in MOBILE6 should be
sent to the attention of David Brzezinski.  Comments may be
submitted electronically to mobile@epamail.epa.gov, or by fax to
(313)741-7939, or by mail to "MOBILE6 Review Comments", US EPA
Assessment and Modeling Division, 2565 Plymouth Road, Ann Arbor
MI  48105.  Electronic submission of comments is preferred.  In
your comments, please note clearly the document that you are
commenting on including the report title and the code number
listed.  Please be sure to include your name, address,
affiliation, and any other pertinent information.

This document is being released and posted on May 30, 1997. 
Comments will be accepted for sixty (60) days, ending July 29,
1997.  EPA will then review and consider all comments received,
and will provide a summary of those comments and how we are
responding to them in the form of a followup document within 30
days after the close of the comment period.

Thank you for your continuing interest in the development of
MOBILE6.

                           Sincerely,
                                
   Emission Inventory Group, Assessment and Modeling Division
                US EPA Office of Mobile Sources