# cc: G. McCarthy

C. Grundler P. Machiele 

# DAflY READING FILE

Robert Perciasepe Acting Administrator U.S. Environmental Protection Agency Mail code: 4101M Ariel Rios Building 1200 Pennsylvania Avenue, N.W. Washington, DC 20460 Richard Moskowitz American General Counsel Fuel & Petrochemical Manufacturers

1667 K Street, NW Suite 700 Washington, DC 20000

202.457.0480 office 202552.8457 direct 202 457.0486 fax Rmoskowtzafprn.org



# Subject: Request for an Extension of the Public Comment Period on EPA's Proposal for Tier 3 EPA-HQ-OAR-201 1-0 135 

# Dear Mr. Perciasepe:
As you know, the Agency released a proposal for Tier 3 motor vehicle and fuel standards on March 29, 2013. This proposal has not yet been published in the Federal Register.
In a hearing notice published in the Federal Register on April 8, 2013, EPA announced that the public comment period would end on June 13, 2013. The length of this comment period is inadequate for a broad technical rulemaking such as this, especially one that includes diverse topics of vehicle emissions standards, fuel standards and the distinct unrelated issue of Performance Based Measurement System. Each of these issues requires different technical expertise to analyze.
The docket was opened on April 15. 

# There are over 600 documents now in the Tier 3 docket in the Supporting and Related Material category. It is virtually impossible to review and analyze this volume of supporting technical information in the time allotted for public comment. Accordingly, we request additional time to prepare informed comments on the proposal.
AFPM requests that the public comment period be extended to 90 days after publication of the proposal in the Federal Register.

Richard S. MoskowitzDelivery Address Bar Code

TRK# 

### 7995 6968 4125 WOl 

### MON -22 APR 3:OOP STANDARD OVERNIGHT Ship Date: 19APR13 ActWgt 02 LB CAD: 4458810i1NET3370 From: (202) 457-0480 Origin ID: BZSA Richard Moskowils, General Counsel AFPM 1667 KStreet NW Suite 700 Washington, DC 20006

Jt3i1iX72l SHIP TO: 2O2) 564-4711 BILL SENDER 

### Acting Administrator Bob Perciasepe U.S. Environmental Proctection Agen Ariel Rios Building (AR), 4101M 1200 Pennsylvania Avenue, N.W. Washington, DC 20460

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