NEAR RICHLAND, WA - Washington River Protection Solutions says they have now emptied 11 single shell waste tanks.
WPRS posted a picture of the 530,000 gallon C-110 tank on their Facebook page Thursday afternoon.
If you look closely at the picture, you can see part of the tank floor and the Foldtrack waste-retrieval system that was used to empty the tank.
An engineering evaluation shows that the remaining waste volume in the tank met regulatory requirements by bringing it below 360 cubic feet.
The U.S. Department of Energy said Thursday that the waste was transferred to a newer double-walled tank that is considered less likely to leak.
The wastes are left over from the production of plutonium for nuclear weapons at Hanford. There are 56 million gallons of radioactive and chemical wastes stored in Hanford's 177 underground tanks. Some of the tanks have leaked.