An anonymous reader writes: Over the weekend, thousands of gallons of radioactive waste have leaked at a nuclear storage tank in Washington State. One worker called the leak "catastrophic." RT writes, "The Hanford Nuclear Reservation was originally constructed in 1943 as part of the Manhattan Project." It produced plutonium for weapons, including the atomic bomb dropped on Nagasaki, Japan. The U.S. Department of Energy started removing what was left in the tank in March when workers discovered leaked waste had reached a depth of 8.4 inches. The Department of Energy calls the leak "anticipated," posing no threat to the public. Mike Geffre, the worker who discovered the leak, told King5 News, "This is catastrophic. This is probably the biggest event to ever happen in tank farm history. The double shell tanks were supposed to be the saviors of all saviors (to hold waste safely from people and the environment)." The double-wall storage tank AY-102 has been slowly leaking since 2011. It wasn't until March of this year that the U.S. Department of Energy began pumping the waste leftover in the tank.