Oklaunion Plant

Coal Combustion Residuals Monitoring & Reporting

March 2018

In 2015, the U.S. Environmental Protection Agency (EPA) passed a new rule addressing the handling, storage and disposal of coal combustion residuals (CCRs). CCRs are the materials that remain after coal is burned.

Public Service Company of Oklahoma (PSO) recently completed the first steps in the new groundwater monitoring program.

Five Oklaunion Plant ash storage sites currently are included in the CCR program. They are ponds 6, 21, 22 and 23 and the wastewater and sludge pond.

However, the rule does not require groundwater monitoring when an aquifer is not present. The groundwater at Oklaunion does not qualify as an aquifer because it does not yield usable quantities of water.

Additional information

All of these storage sites are in active use.

Oklaunion Plant uses dry handling systems for both fly ash and bottom ash. Ash now is stored in a lined landfill.