President George W. Bush signed into law the Energy Independence and Security Act of 2007 (EISA) on December 19, 2007. The legislation was designed to reduce U.S. dependence on foreign oil by increasing the supply of alternative fuels. EISA requires increased biofuel production from various sources, including biodiesel. In addition to the federal renewable fuels standard, some U.S. states – most notably, California – have adopted, or are in the process of adopting, policies that could expand utilization of biodiesel as a result of its greenhouse gas reduction benefits. The purpose of this paper is to analyze the availability of domestic feedstock that could be used to meet these potential new demands without affecting existing uses (e.g. the animal feed industry).