Expanding the role of biofuels for America : field hearing before the Committee on Agriculture, Nutrition, and Forestry, United States Senate, One Hundred Eleventh Congress, first session, September 1, 2009

Small business innovators : on the cutting edge of energy solutions : hearing before the Subcommittee on Agriculture, Energy, and Trade of the Committee on Small Business, United States House of Representatives, One Hundred Twelfth Congress, second session, hearing held April 26, 2012

Energy and economic growth for rural America : hearing before the Committee on Agriculture, Nutrition, and Forestry, United States Senate, One Hundred Twelfth Congress, second session, February 15, 2012

EPA proposes 2011 renewable fuel standards

Grow it here, make it here : creating jobs through bio based manufacturing : hearing before the Committee on Agriculture, Nutrition and Forestry, United States Senate, One Hundred Thirteenth Congress, second session, June 17, 2014

Response to petitions of the American Fuel & Petrochemical Manufacturers (AFPM) and the American Petroleum Institute (API) for reconsideration of the September 27, 2012 final rule entitled Regulation of fuels and fuel additives, 2013 biomass-based diesel renewable fuel volume

RIN fraud : EPA's efforts to ensure market integrity in the renewable fuels program : hearing before the Subcommittee on Oversight and Investigations of the Committee on Energy and Commerce, House of Representatives, One Hundred Twelfth Congress, second session, July 11, 2012

Airfields and alternative fuels exploring rural America's transportation infrastructure : hearing before the Committee on Finance, United States Senate, One Hundred Tenth Congress, first session, Dubuque, IA, August 27, 2007