In this consolidated appeal, the Leinberger Family (Andrew H. Leinberger Family Trust and DJL Farm LLC) and William and Sharon Critchelow (“Petitioners”) petitioned the Environmental Appeals Board to review four Class VI Underground Injection Control permits that the U.S. Environmental Protection Agency Region 5 issued to FutureGen Industrial Alliance, Inc. (“FutureGen”). These Class VI permits authorize FutureGen to construct and operate four geologic sequestration wells for the purpose of injecting and storing carbon dioxide, a process also known as carbon sequestration.