The rule would adopt a "new statutory interpretation and making corresponding regulatory changes to allow gasoline blended with up to 15 percent ethanol to take advantage of the 1-pound per square inch (psi) Reid Vapor Pressure (RVP) waiver afforded under the Clean Air Act (CAA)," the agency said in a notice filed for public inspection today (June 6). "In doing so, EPA is finalizing an interpretive rulemaking which defines gasoline blended with up to 15 percent ethanol as 'substantially similar' to the fuel used to certify Tier 3 motor vehicles."
EPA is "making regulatory changes to modify certain elements of the Renewable Fuel Standard (RFS) compliance system, in order to improve functioning of the renewable identification number (RIN) market and prevent market manipulation."
Some portions of the final rule are effective immediately, with other parts effective May 30, and still other portions will beco