"You're part of the solution," she said to the American Coalition for Ethanol (ACE) members.
Jackson spoke to the group for about 15 minutes, then shared question and answer time.
"We're trying to move to a different fuel mix in this country," Jackson said. "Corn-based ethanol is here, part of our mix now."
She spoke highly of Agriculture Secretary Tom Vilsack and his depth of understanding about ethanol-related issues. EPA and USDA often work together on biofuels-related issues.
Jackson said she knows the blend wall issue is something we're very concerned about, and many of the questions from the group surrounded the blend wall and how it can be overcome - quickly.