Add Yahoo as a preferred source to see more of our stories on Google. A third aging underground tank at the Hanford nuclear site is suspected of leaking highly radioactive and hazardous chemical waste ...

After strong opposition from the Kaanapali community over the most recently proposed site for a million-gallon treated wastewater storage tank, the county Department of Environmental Management is ...

FILE - In this Aug. 13, 2019, file photo, a sign at the Hanford Nuclear Reservation is posted near Richland, Wash. Officials say an underground nuclear waste storage tank that dates to World War II ...

There are "significant construction flaws" in some newer, double-walled storage tanks at Washington state's Hanford nuclear waste complex, which could lead to additional leaks, according to documents ...

At least six underground-storage tanks each holding tens of thousands of gallons of nuclear and chemical waste are leaking at the Hanford nuclear reservation, the nation’s most contaminated Cold War ...

Two options that might speed up removal of radioactive waste from leaking underground storage tanks at Hanford will be evaluated, according to the terms of a settlement agreement reached Wednesday.

A third aging underground tank at the Hanford nuclear site is suspected of leaking highly radioactive and hazardous chemical waste into the ground, the Department of Energy said Thursday. “This is ...