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EPA has finalized a revision to the 2013 cellulosic biofuel standard published on August 15, 2013. This action follows from EPA having granted two petitioners' requests for reconsideration of the 2013 cellulosic biofuel standard. EPA granted reconsideration because one of the two companies that EPA expected to produce cellulosic biofuel in 2013 announced soon after EPA signed its final rule that it intended to produce substantially lower volumes of cellulosic biofuel in 2013 than it had earlier reported to EPA. Since the cellulosic biofuel standard was based on EPA's projection of cellulosic biofuel production in 2013, EPA deemed this new information to be of central relevance to the rule, warranting reconsideration. On reconsideration, EPA is directed to base the standard on the lower of "projected" production of cellulosic fuel in 2013 or the cellulosic biofuel applicable volume set forth in the statute. Since data are available to show actual production volumes for 2013, EPA's "projection" and final rule are based on actual cellulosic biofuel production in 2013. This action only affects the 2013 cellulosic biofuel standard; all other RFS standards remain unchanged. EPA finalized a revised cellulosic biofuel standard of 0.0005% for 2013.