'Catastrophic Leak' Found at Hanford Nuclear Site in Washington State

The amount of radioactive waste that has been leaking between the two walls of one of the underground tanks at Hanford Nuclear Reservation in Washington State for several years grew dramatically on Sunday, April 17, with up to 13,000 liters (3,500 gallons) of new waste.

The leak occurred at the double-shell storage known as AY-102, which has been leaking small amounts of nuclear waste since 2011. It is estimated that about 265 liters (70 gallons) of waste leaked from the tank in recent years....
http://www.alternet.org/environment/catastrophic-leak-found-hanford-nuclear-site-washington-state