A leak of a low level concentration of tritium at Oconee Nuclear Station has been confirmed by the Nuclear Regulatory Commission. The leak reported yesterday is believed to be greater than 100 gallons of water, with the potential to reach groundwater. However, an NRC spokesman said the water is mildly radioactive, and its level is far below EPA drinking water standards. The NRC’s Joey Ledford said the leak occurred during the transfer of radioactive water between two ponds and there was a leak and spill. Although the levels were below the threshold of a required notification, the city of Seneca and Clemson University utility services were among agencies notified.