On March 22, the petroleum refinery industry called on the Environmental Protection Agency (EPA) to reduce that amount of ethanol that must be blended into the gasoline supply in 2013 and 2014 to avoid hitting the blend wall. EPA’s proposed renewable fuel standard (RFS) for 2013 would require refiners to blend 16.6 million gallons of renewable fuels, including 14 million gallons of cellulosic ethanol.