Air Plan Approval; Illinois; Removal of Variance for Illinois Power Holdings and AmerenEnergy Medina Valley Cogen Facilities

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The Environmental Protection Agency (EPA) is proposing to approve a revision to the Illinois State Implementation Plan (SIP) submitted on January 23, 2020, by the Illinois Environmental Protection Agency (IEPA). The revision removes the variance for coal-fired electrical generating units (EGUs) owned by the Illinois Power Holdings, LLC (IPH) and the AmerenEnergy Medina Valley Cogen, LLC (Medina Valley) from the Illinois SIP, and will reimpose tighter limits on all facilities currently in operation.