U.S. Environmental Protection Agency

May 17, 1999

Document Released for Stakeholder Review and Comment
     
"Modeling Diurnal and Resting Loss Emissions from Vehicles
Certified to the Enhanced Evaporative Standards"


Report Number M6.EVP.005,  EPA420-P-98-012



     This document reports on EPA's proposed methods of
estimating the resting loss and diurnal evaporative hydrocarbon
emissions from vehicles certified to the enhanced evaporative
standards (i.e., some 1996 through 1998 and all 1999 and newer
vehicles).  Since this draft report is a proposal, its analyses
and conclusions may change to reflect comments, suggestions, and
new data.

     Please note that EPA is seeking comments that might aid us
in modeling any aspect of resting loss or diurnal evaporative
emissions.

     Comments on this report and its proposed use in MOBILE6
should be sent to the attention of Larry Landman.  Comments may
be submitted electronically to mobile@epa.gov, or by fax to (734)
214-4939, or by mail to "MOBILE6 Review Comments", US EPA
Assessment and Modeling Division, 2000 Traverwood Drive, 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 17, 1999.
Comments will be accepted for sixty (60) days.  EPA will then
review and consider all comments received and will provide a
summary of those comments, and how we are responding to them.