The U.S. Environmental Protection Agency plans to offer a proposal for Renewable Fuels Standards (RFS) for 2014, 2015 and 2016 this spring, and will use actual production levels to determine last year’s mandated volumes. Reuters reports that the agency will address all three years at once and plans to look at broader changes to address long-term issues of demand as well as arguments from refiners that ethanol blending capacity has hit its peak. Read more at USAgNet…