The waste was found in a new place between the walls of Tank AY-102. It is dry waste covering an area of 7 feet by 21 inches.
The Tri-City Herald reported Thursday that no waste is believed to have escaped into the soil beneath the tank. Hanford authorities have known the tank was leaking for about a year.
State officials have urged the U.S. Department of Energy to empty the tank and have criticized federal officials for not taking action.
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