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EPA/AR RIN: 2060-AN94 Publication ID: Fall 2008 
Title: Regulation of Fuels and Fuel Additives: Revised Definition of Substantially Similar Rule for Alaska 
Abstract: This rule would revise EPA's gasoline-engine emission regulations to allow the use of the latest version of ASTM technical standards for Alaska. Gasoline-powered engines in Alaska face special challenges. Extremely cold winter temperatures increase the risk that engines using typical gasoline blends will suffer from difficulty in cold starting. To address these unique circumstances, the new ASTM 4814-04 standards for gasoline include special subclasses for gasoline used in extremely cold conditions. The new parameters enhance vehicle cold start and warm-up performance by allowing slightly different volatility characteristics for gasoline. Current EPA regulations only allow the use of the older 1988 version of the ASTM gasoline standards, which do not address Alaska’s cold climate. This rulemaking is intended to adopt new specifications by changing the “Substantially Similar” definition to include the new standards in ASTM 4814-04 for Alaska only. This action is supported by automobile manufacturers and Alaska refiners. 
Agency: Environmental Protection Agency(EPA)  Priority: Substantive, Nonsignificant 
RIN Status: Previously published in the Unified Agenda Agenda Stage of Rulemaking: Completed Actions 
Major: No  Unfunded Mandates: No 
CFR Citation: 40 CFR 80   
Legal Authority: CAA 211   
Legal Deadline:  None
Timetable:
Action Date FR Cite
Direct Final Action  04/25/2008  73 FR 22277   
Additional Information: SAN No. 5080; EPA publication information: Direct Final Action - http://www.epa.gov/fedrgstr/EPA-AIR/2008/April/Day-25/a8944.htm
Regulatory Flexibility Analysis Required: No  Government Levels Affected: None 
Small Entities Affected: No  Federalism: No 
Included in the Regulatory Plan: No 
RIN Data Printed in the FR: No 
Agency Contact:
Jaimee Dong
Environmental Protection Agency
Air and Radiation
6406J,
Washington, DC 20460
Phone:202 343-9672
Fax:202 343-2802
Email: Dong.Jaimee@epamail.epa.gov

Dave Kortum
Environmental Protection Agency
Air and Radiation
6406J,
Washington, DC 20460
Phone:202 343-9022
Email: kortum.dave@epamail.epa.gov