Merom Generating Station has 29 groundwater monitoring wells, 16 of which have been polluted above federal advisory levels based on samples collected between May 26, 2010 and November 20, 2015. Groundwater at this site contains unsafe levels of sulfate, boron, manganese, arsenic and fluoride.Site description
Merom Generating Station is a coal-fired plant located near Sullivan, IN and the Wabash River. The plant sits on the banks of an unnamed lake. There are three coal ash landfills at the station: Inactive Area 1, Active Area 2, and Area 3. The landfills were designed with either natural cohesive soil barriers or a compacted clay liner. Area 1 and Area 2 landfills were not equipped with a leachate collection system. Area 3 was planned for closure in October, 2016.
In the early 2000s, the Indiana Department of Environmental Management discovered increasing chloride and sulfate trends at the monitoring wells near Areas 1 and 2. There were also problems with drainage ditches near Area 2 that were potentially causing this increase in chloride and sulfate concentration.
This site is among the U.S. Environmental Protection Agency's list of potential damage cases.