With a growing number of “small refinery” exemptions being granted by EPA to not-so-small companies, a bipartisan group of senators is asking President Trump to allow 15% ethanol fuel (E-15) to be sold during the summer all over the country starting this year.

In a letter to the president Monday, 18 ethanol state senators made two specific requests. First, they ask that EPA provide an expected timeline for an administrative Reid Vapor Pressure or RVP waiver. Second, they request the agency allow for the sale of E-15 during the upcoming summer driving season in the meantime.

“Lifting these barriers will create a new market for surplus crops, while strengthening our energy security and delivering a jolt to the rural economy,” said Growth Energy CEO Emily Skor. “We continue to be grateful to our champions in Congress for pushing the EPA to make good on the president’s commitment to year-round E15 sales.”

“It is unacceptable for EPA to drag its feet to allow E15 and higher ethanol use year-round while it makes time to rubber stamp so-called ‘hardship’ waivers enabling refiners to escape their legal responsibility to blend ethanol under the Renewable Fuel Standard,” said American Coalition for Ethanol (ACE) CEO Brian Jennings.

A report from Reuters on Monday said that EPA granted a small refinery hardship exemption to CVR Energy, owned by billionaire and presidential advisor Carl Icahn.