RICHLAND, Wash. -- DOE's Richland Operations Office (RL) and contractor Washington Closure Hanford (WCH) have removed what is believed to be the primary source of chromium contamination to the Columbia River near Hanford's D Reactor after workers excavated 2.2 million tons of material from waste sites.
Two waste sites near D and DR Reactors, 100-D-104 and 100-D-30, were merged together, equaling a little more than seven football fields in area at the excavation surface and a single football field in size at the bottom. The excavation at these two sites was close to 880,000 tons. About 1.32 million tons also were excavated from a third waste site, 100-D-100. Together, remediation of all the 100-D waste sites has removed 2.2 million tons of material, of which nearly 60,000-tons of the contaminated material was sent to Hanford's onsite disposal facility, the Environmental Restoration Disposal Facility (ERDF), to be treated and disposed.
"The completion of these large waste sites removes the mother lode of chromium contamination in the reactor area," said RL Federal Project Director Mark French.
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