Stanton Energy Center has 28 groundwater monitoring wells, 15 of which have been polluted above federal advisory levels based on samples collected between September 28, 2010 and October 13, 2016. Groundwater at this site contains unsafe levels of sulfate, cadmium, lead, cobalt, manganese, arsenic and molybdenum.Site description
The Orlando Utilities Commissions' Stanton Energy Center is located in central Florida outside of Orlando. The plant began operating in 1987 with one 425 MW coal-fired operating unit. A second 429 MW coal-fired unit was built in 1996, and a 656 MW natural gas-fired unit began operating in 2003. Groundwater beneath the site flows from west to east, generally, except north of the coal storage area where it flows to the north.
A landfill, called the combustion waste storage area, and five lined ponds are operated on-site.The landfill primarily contains scrubber sludge and fly ash, and other materials dredged from the site's lined ponds and other plant wastes. A 2010 groundwater investigation revealed that the combustion waste storage area impacted groundwater to its east, likely after groundwater levels rose to the base of the landfill.
A July 2010 investigation of pond liner integrity at the site's five lined ponds identified potential issues with design (water levels frequently overtopped the liners and associated vent pipes, resulting in leaks) and maintenance (torn liners, damage to underlying concrete, and build-up of sediments that interfere with liner effectiveness) that required repairs and/or remediation. According to a January 2013 correspondence, the Utilities Commission planned to replace the liners and make necessary repairs by the end of 2016.
The site is among the U.S. EPA's list of potential damage cases, indicating that it has potentially polluted groundwater or surface water at levels which threaten human health and the environment. For more information about Stanton Energy Center, see EIP reports Dirty Kilowatts, Out of Control, and visit SoutheastCoalAsh.org.