UNITED STATES ENVIRONMENTAL PROTECTION AGENCY

NATIONAL VEHICLE AND FUEL EMISSIONS LABORATORY

2000 TRAVERWOOD DRIVE

ANN ARBOR, MI  48105-2498

									     OFFICE OF

									AIR AND RADIATION

2/16/16

MEMORANDUM

SUBJECT: Feedbacks on the released debugging version of GEM with EMA

FROM: Houshun Zhang

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 February 2, 2016 between
representatives of EMA and EPA to verbally discuss the feedbacks on the
released debugging version of GEM proposed in the Phase 2 greenhouse gas
and fuel efficiency standards for heavy-duty vehicles notice of proposed
rulemaking.  

The feedback included numerous potential bugs and issues identified by
the EMA members and some of confusions resulted from lack of
documentation.  EPA agreed that we will look into the issues and add
more clarifications for the next release.

