Washington Closure Hanford and its subcontractor employees have worked 4 million hours without a lost workday due to injury for the second time since beginning work to clean up contamination along the Columbia River at Hanford in 2005.
It has taken the approximately 750 workers about two years to hit the milestone.
"They routinely demonstrate their commitment to safety while tackling hazardous and changing conditions on a daily basis," said Scott Sax, Washington Closure president.
Last year, the Department of Energy contractor received DOE's Legacy of Stars Award for achieving Star of
Excellence safety status for four consecutive years.
Washington Closure has finished 92 percent of the work under its 10-year contract. It has completed its cleanup work on 178 square miles of land by demolishing 306 of 331 buildings and cleaning up 500 of 584 waste sites in its contract. Many of these sites contained hazardous chemicals and radiological contamination.