U.S. Environmental Protection Agency
William Jefferson Clinton
Building 1200 Pennsylvania Avenue, N. W.
Washington, DC 20460
December 8, 2015
Nearly 30 years ago, the Environmental Protection Agency (EPA) developed a 1-pound per square inch (psi) waiver of the Reid Vapor Pressure (RVP) volatility requirements for certain gasoline blends.1 It did so in recognition of the fact that lower volatility blendstocks were not readily available in the marketplace and to encourage the increased use of renewable fuels. The Agency also concluded, after extensive air quality modeling, that the 1- psi waiver would not result in increased ozone formation because reductions in exhaust hydrocarbons and carbon monoxide would offset the impact of potentially higher evaporative emissions. Read Full