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By Andrew Tarantola on at

The Sludge-Busting MARS Arm Blasts Away Radioactive Waste

In 1943, the US government needed a reliable center for processing the Manhattan Project's nuclear material. Officials chose the 568-acre Hanford site in the deserts of Washington State to house nine nuclear reactors and 143 single-walled, underground waste tanks. Fast-forward 68 years and the US government is still working at Hanford — not as a research facility, but as one of the country's most polluted Superfund sites.