Source: http://www.biofuelsdigest.com/bdigest/2013/08/07/epa-sets-final-2013-us-renewable-fuel-mandate/
http://www.epa.gov/otaq/fuels/renewablefuels/documents/420f13042.pdf
The standard specifically requires:
• Biomass-based diesel (1.28 billion gallons)
• Advanced biofuels (2.75 billion gallons)
• Cellulosic biofuels (6.00 million gallons)
The EPA action essentially waived down cellulosic biofuels from 14 million to 6 million gallons, while keeping other proposed numbers largely in place. The 1.28 billion gallons in biomass-based diesel will count as 1.92 billion ethanol-equivalent gallons towards the overall 2.75 billion gallon advanced pool. The remainder is likely to reflect primarily renewable diesel and Brazilian sugarcane ethanol.