On October 27, 2016, EPA approved an Efficient Producer petition submitted by Redfield Energy, LLC (Redfield Energy) granting “a pathway for the generation of renewable fuel (D-code 6) Renewable Identification Numbers (RINs) under the Renewable Fuel Standard (RFS) program for the production of non-grandfathered ethanol” produced by dry milling.  The Efficient Producer petition process is designed to accelerate the registration process for starch and grain sorghum ethanol producers that exhibit superior process efficiency.  Redfield Energy claimed the process achieved a 23.9 percent greenhouse gas (GHG) reduction, which surpassed the 20 percent reduction threshold.  The South Dakota plant will be the 63^rd to gain approval since EPA introduced the Efficient Producer pathway petition process in 2014.