UNITED S T

ATES**ENVI~ONMENTAL** PROTECT I ON AGENC Y NATIONAL VEH I C L E AND F UEL E M I SSIONS LABORATORY 2565 PLYMOUTH ROAD ANN ARBOR, MICHIGAN 481 05-2498

MEMORANDUM 

### Sert 11 ,20 13 OFFICE OF AIR AND RADIATION

SUBJECT: EPA & General Motors Meetin g o n Issue s Related to Tier 3 NPRM

/' 

# . .**~** FR O M: G l enn W. P assavant, Offi, ,e of T ran sportatio n and Air Quality

T O: Public Docket EPA-H Q

- OAR

- 2 011-0 1 35

A. Introduction
On August 14 , 2013 EPA s taff and , ·epresentatives of General Motors met to di sc uss i ss ue s a nd que st ion s re l ated t o the provisi c · n s ofthe Tier 3 N PRM. A copy ofthe agenda and attendees i s attac hed

. B. Di scussio n:
After per so nal introducti o ns and some brief intr o ductory remark s, di scussions fo llowed th e agenda. T h e discussions we re bri e f and hea v il y referenced GM co mment s on the T ier 3 N PRM where applicable. There were t hree areas where m ore d etai l ed discu ss i o n s occurred.
Harmoni zation with LEV III Progra m: · aM emphasized th e imp orta nce of a li gn ment w ith the LEV III program t o the greate st degree p ossib l e. When EPA inquired abou t t he imp ac t oftiming of t he Tier 3 final rule act io n , GM responded that s lipping a couple of month s into 2014 was okay provided that k € y related program elements impacting 20 1 7 model yea r impl e m e ntation were as expect e d.
Tes t Pr oce dure A dju stmen t Due t o C h a nge in Test Fue l CR-Factor): GM provided some initial ver b a l feedback o n EPA's staff presentation to the Alliance of Automobile Manufacturers and the Association of Global Automakers on A u g ust 7 , 2013. Key point s byGM. (l ) They wa nt the R-f actor i ss ue res)lved a s soon as possible. They prop osed th at EPA set i t at 1.0 in the Ti er 3 final rule and**~vise** it thr o u g h rule at a la te r date if ne cessary
. EPA staff acknowledged the need f or a t i m e ly but thorough action on the R

- fact o r ba se d on the best available data but rejected GM 's idea on a move to set Rat I .0 now
. (2) G M is very concerned about du al testing burdens (i.e., testing both FEDV s and EDVs
o n EO and E I X) fu el. ( i

) GM Doe s not want FEDVs to have to pass emission sta ndard s on E O a nd E I X. (ii) GM want s the option n o t t o have to test FE DVs on E O for mpg calculation purposes. GM \ va n ts to be able to u se EDV te st results on ElX

. (i ii ) GM supports litm u s on ElX o r EO at their c h o ic e. (iv) GM wa nt s on l y one f u e l for IUVP, pr e ferably E I X. (3) GM pr ov i de d some written feedb ac k on Augu st 15, 2013. T his is attached.Certifying Nationwide Early Using LEV Ill Vehicles: GM strong l y emphasized their interest in certify in g 2015 model yea r LEV III vehicles nationwide u s in g CA fue l for purposes on earning NMOG 

### + NOx and ea rly evapo rative emission credits. T h ey sought
assurances that EPA wou ld accept e mission test r esu lt s based o n 7 RVP El 0 fuel.

US06 PM Sta ndard : Based on new information from Cal iforni a which is available to GM, EPA staff set fo rth the idea that th e US06 PM standard should be 6mg/mi with a 12 mg / mi in-u se standard in place during the phase-in (through the 2021 MY production)

. EPA asked GM for any data t he y have on US06 PM and to consider this id ea.
ORVR for HDGVs: EPA confirmed that the NPRM did not cover ORVR for in complete HDGVs , but GM agreed t h at the requirements could cover all complete HDGVs independent of GVWR beginning in the 20 18 MY. OM agreed to provide EPA information on sales of incomplete**~GVs** above 8,500 lb s GWWR.
HDGE Certification Gasoline: GM agreed that HDGEs using the engine dynamometer for emissions certificat ion wou l d ha ve 1 0 be certified for emi ss ions on Tier 3 certification fuel by the 2022 model year
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### A. Ru l emaking T iming
B

. GM Comments Draft Agenda GM

- EPA Tier 3 Meeting Au gust 14 , 20 1 3

I. H armonization with •C alifornia's LEV III Program
II. Test Procedure Adjustment Due to Change in Test Fuel (R-Factor)
Ill. Four Wheel Drive (4WD) Dynamometers
IV. 4WD Dynamometer T t !St Procedure Adjustment

> V. 4WD Dynamometer Filcility Impacts
VI. 10 psi RVP Tier 3 Test ruel for Evaporative Emission Testing
VII. Evaporative Emission P hase-in
VIII. Evaporative Emission Testing Ethanol Adjustment Factor

IX. In-Use Compliance Cr i t eria
X

. Expansion of AECD Requirements
XI. Certifying Nationwide Early Using LEV Ill Vehicles
XII. Preconditioning for ln

.. use Testing
XIII. Tier 3 Exhaust Emissions Certification Fuel
XIV. Regulations Governin!J Use of Alternative Test Fue l s
XV

. Tier 3 Certificat i on FUE ! I RVP and Marketplace Fuel RVP Should both be 9 RVP during the**Summ ~r**  VOC Control Season
XVI. Gasoline Octane is Important for Emissions- Certification and Market Fuels
XVII. Alternative Certification Fuels
XVII I

. Tier 3 Market Fuel Gasoline Sulfur Standards


### C. ARB Comme n ts

### • 1 mg/mi Long- Term FTP PM Standard
• 4 mg/mi US06 PM Standard
• Certification Fuel Rec i procity
D. Alliance/Global Comments a. Exclude >8500 lbs ineompletes from ORVR b. Other topics?