Would a site be disqualified if it was 25 miles or less from the Indiana state line due to concerns about subsurface migration of CO2 beyond the Illinois state line?
While this is subject to change in the Request for Site Proposals, the FGA currently believes that the injection site and injection formation must be located within the State of Illinois with no foreseeable risk of subsurface migration of CO2 outside the State of Illinois. Because the CO2 storage hub is a first-of-a-kind demonstration project and because monitoring wells may need to be placed at the maximum extent of the expected plume, an injection well may be no closer than 20 miles (32 kilometers) (measured horizontally, not diagonally) from the Illinois state line as a conservative safe distance.
