Sen. Chuck Grassley (R-Iowa) sent a letter to Environmental Protection Agency (EPA) Administrator Lee Zeldin echoing concerns raised by Iowa Attorney General Brenna Bird regarding Small Refinery Exemptions (SREs) under the Renewable Fuel Standard (RFS).

In the letter, Grassley is urging the EPA to investigate allegations that small refiners are manipulating the RFS program by falsely claiming economic hardship to the EPA in order to be exempted from blending renewable fuels or buying renewable fuel credits.

“Attorney General Bird’s letter raises meaningful questions about Small Refinery Exemptions. Iowa’s biofuel producers need timely answers about the health of their industry. For 20 years, the Renewable Fuel Standard has supported biofuels producers, family farmers and rural communities. Its integrity is essential for long-term success. I thank Administrator Zeldin for hearing my concerns for the biofuel industry, and I urge him to fully investigate these allegations,” Grassley said.

The full text of the letter can be accessed here.

Read more from Sen. Grassley here.