UNITED STATES ENVIRONMENTAL PROTECTION AGENCY

NATIONAL VEHICLE AND FUEL EMISSIONS LABORATORY

2000 TRAVERWOOD DRIVE

ANN ARBOR, MI  48105-2498

									     OFFICE OF

									AIR AND RADIATION

3/14/16

MEMORANDUM

SUBJECT: Test Procedure Review with the Alliance of Automobile
Manufacturers and Global Automakers

FROM: Christopher Laroo

TO:  Greenhouse Gas Emissions Standards and Fuel Efficiency Standards
for Medium- and

Heavy-Duty Engines and Vehicles - Phase 2 - Docket EPA-HQ-OAR-2014-0827

This memo documents communication on March 14, 2016 between
representatives of the Alliance of Automobile Manufacturers, Global
Automakers, and EPA to discuss light-duty vehicle test procedures in 40
CFR parts 1065 and 1066 proposed in the Phase 2 greenhouse gas and fuel
efficiency standards for heavy-duty vehicles notice of proposed
rulemaking.  The draft part 1065 and 1066 working documents and e-mail
are enclosed.

The discussion topic included test procedures in 40 CFR parts 1065 and
1066 specifically as it pertains to partial flow sampling systems for PM
measurement and filter face velocity.  The procedure modifications
provide a methodology for use of partial flow sampling systems utilizing
the single filter per test sampling methodology, without having to flow
weight flow over the filter in phases 1 and 3 of the FTP.  Rather the
dilution fraction is increased.  The changes also cover increased filter
face velocity to increase filter mass loading based on the results of
phase 1 of the CRC E-99 study.  The draft partial flow test procedure
was shared with Giedrius Ambrozaitis and Julia Rege for distribution to
their members.

