Hanford tank farm employees have worked more than 2 million hours without a work day lost to injury.
It's the first time Washington River Protection Solutions has passed the 2 million hour mark since it took over operation of the tank farms in October 2008.
It's also the first time that many consecutive safe hours have been worked at the tank farms since 2002.
"This is an amazing accomplishment, especially for a large, diverse organization doing scores of challenging jobs," said Ray Skwarek, the safety manager for the contractor.
Washington River Protection Solutions manages the tank farms where 53 million gallons of radioactive waste are stored underground. It also operates the 242-A Evaporator and is making improvements at the 222-S Laboratory, Hanford's only two operating nuclear facilities, according to the contractor.