CNBC | US EPA grants biofuels waiver to billionaire Carl Icahn's oil refinery: Sources CNBC The U.S. Environmental Protection Agency has granted a financial hardship waiver to an oil refinery owned by billionaire Carl Icahn, a former adviser to President Donald Trump, exempting the Oklahoma facility from requirements under a federal biofuels ... Exclusive: US EPA grants biofuels waiver to billionaire Icahn's oil refinery - sources EPA Grants Waiver to Oil Refinery of Billionaire Former Trump Adviser Carl Icahn |