UNITED STATES ENVIRONMENTAL PROTECTION AGENCY

NATIONAL VEHICLE AND FUEL EMISSIONS LABORATORY

2000 TRAVERWOOD DRIVE

ANN ARBOR, MI  48105-2498

									     OFFICE OF

									AIR AND RADIATION

8/27/15

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 August 27, 2015 between
representatives of the Alliance of Automobile Manufacturers, Global
Automakers, and EPA to discuss light-duty vehicle test procedures in 40
CFR part 1066 proposed in the Phase 2 greenhouse gas and fuel efficiency
standards for heavy-duty vehicles notice of proposed rulemaking.  The
draft part 1066 working document and e-mail is enclosed.

The discussion topic included test procedures in 40 CFR part 1066
specifically as it pertains to partial flow sampling systems for PM
measurement.  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 draft partial flow test procedure was shared with
Giedrius Ambrozaitis and Julia Rege for distribution to their members.

