Air Plan Approval; Minnesota; Flint Hills Sulfur Dioxide (SO2

The Environmental Protection Agency (EPA) is proposing to approve a revision to the Minnesota sulfur dioxide (SO2) State Implementation Plan (SIP) for the Flint Hills Resources, LLC Pine Bend Refinery (FHR) as submitted on February 8, 2017. The proposed SIP revision pertains to the introduction and removal of certain equipment at the refinery as well as amendments to certain emission limits, resulting in an overall decrease of SO2 emissions from FHR.