U.S. Environmental Protection Agency


       Document Released for Stakeholder Review and Comment

     Evaporative Emissions of Gross Liquid Leakers in MOBILE6 

                  Report Number   EPA420-P-99-025
                         M6.EVP.009

     In six previous documents (M6.EVP.001, M6.EVP.002, M6.EVP.004,
M6.EVP.005, M6.EVP.006, and M6.EVP.008), EPA noted that a potentially
significant portion of evaporative emissions may be the result of a small
number of vehicles leaking liquid gasoline (rather than gasoline vapors).  This
document describes this approach and EPA's proposed estimates of both the
frequency of occurrence vehicles with significant leaks of liquid gasoline and
the magnitude of the emissions from those leaks.

     Please note that EPA is seeking any input from stakeholders and reviewers
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 July 14, 1999.  Comments
will be accepted for sixty (60) days, ending September 9, 1999.  EPA will
then review and consider all comments received and will provide a summary of
those comments, and how we are responding to them.