    Sentence 1: The. equivalent of 75,000. '55-gallon  barrels of waste thought to contain transuranic  waste are stored underground at Hanford .    fentence 2: The equivalent, of 75,000.55-gallon  barrels | ‘of transuranic and low-level  radioactive ‘waste ; some of it. mixed with  hazardous chemicals , is buried at Hanford -