RICHLAND, Wash. - Crews working to clean up groundwater contamination near the Columbia River at Hanford are six months ahead of schedule.
The U.S. Department of Energy announced Monday that workers have exceeded DOE's annual goal of removing 500 pounds of hexavalent chromium from groundwater before the end of the fiscal year.
Contractor CH2M HILL Plateau Remediation Company has helped DO double the amount of chromium removed from groundwater each year by applying its global groundwater treatment expertise to the cleanup.
The contamination comes from planned and unplanned releases of chemicals from the site's plutonium production reactors. The chemicals contaminated a large area of soil along the river and seeped into the groundwater over time.