Summer 2013 Reformulated Gasoline (RFG)
    Regulatory Requirements

    This information is to remind you of the U.S. Environmental Protection Agency (EPA) summer requirements for Reformulated Gasoline (RFG).

    The Clean Air Act Amendments of 1990 mandated that the EPA develop regulations requiring gasoline in certain areas in the U.S. to be reformulated to reduce vehicle emissions of toxic and ozone forming compounds. Reformulated gasoline is designed to reduce volatile organic compound (VOC) emissions, and to prevent increases in nitrous oxide emissions (NOx) in the summer and toxic pollutants year-round.

    The RFG program is in effect throughout the year. The program has winter (non-VOC Control Period) and summer (VOC Control Period) components.

    Since RFG is a year-round program, the restrictions on product distribution to assure only RFG is delivered into an RFG covered area should already be in place. RFG program controls are not seasonal, unlike, for example Reid Vapor Pressure (RVP) programs for conventional gasoline.

    Attachment I lists Federal RFG-covered areas which are within 200 miles of either a Marathon Petroleum Company LP (MPC) terminal or a MPC exchange or throughput terminal. The summer standard for RFG is a minimum VOC emission reduction of 23.4% for Region 2 RFG areas and a minimum VOC emission reduction of 25% for Region 1 RFG areas. The summer standard for Chicago or Milwaukee RFG blended with 10% ethanol is a minimum VOC emission reduction of 21.4% and is considered Region 2 "Adjusted VOC gasoline." The “Adjusted VOC gasoline”, though Region 2, is less stringent than the VOC standard for Louisville and Covington and therefore Chicago/Milwaukee VOC controlled RFG may not meet the Louisville/Covington RFG specifications. For this reason, MPC will restrict “Adjusted VOC gasoline” (Chicago/Milwaukee) from being sold into the Louisville/Covington and St. Louis markets.

    The summer VOC Control Period Program is effective in RFG areas May 1 through September 15 at all facilities, except retailers and wholesale purchaser/consumers to whom it applies June 1 through September 15.

    Phase II of the complex RFG model took effect on January 1, 2000. There is no longer an RVP requirement for VOC RFG. Now a complex model equation calculates VOC emission reduction based on eight fuel parameters. RVP is, however, the primary parameter influencing this equation.

    The EPA will allow a 2% tolerance on the emission reduction percentage for the summer.

    The regulations prohibit the commingling of VOC controlled RFG containing ethanol with VOC controlled RFG made with any other oxygenate during the summer VOC Control Period. This prohibition does not apply to commingling of a VOC controlled RFG with a non-VOC controlled RFG or the commingling of two non-VOC controlled RFGs. This allows for seasonal conversions between ethanol and ether RFGs.

    It is your responsibility to assure your retail station/store tankage has adequate turnover to meet the summer RFG requirements by June 1.

    The RFG regulations require the Product Transfer Documents for VOC controlled (summer) RFG to indicate whether ethanol is present or not. The appropriate notation will be present on Bills of Lading for VOC controlled RFG available from MPC supply sources. See Attachment II for product availability at MPC terminals.


    MPC urges you to review the regulations and EPA’s RFG Question and Answer documents. This outline of the regulatory requirements is provided by MPC as a courtesy, is general in nature, and is not intended to serve as legal advice or counseling. Contact your own attorney for information about how these regulations apply to your business.

    Additional information regarding the U.S. EPA’s RFG and Anti-Dumping regulations can be found in the Title 40 Code of Federal Regulations Part 80[-59 FED. REG. 7716 (February 16, 1994); -59 FED. REG. 36944 (July 20, 1994); and -62 FED. REG. 68196 (December 31, 1997)]. You may also direct questions concerning the regulations to:

    U.S. Environmental Protection Agency
    401 M Street, S.W. (6406J)
    Washington, D.C. 20460

    We appreciate your business and hope this information will assist you in making the appropriate changes within your company to comply with these U.S. EPA regulations.

    Updated: Friday, May 3 2013