Living bacteria found in toxic, radioactive soil By TOM PAULSON, Seattle Post Intelligencer
The waste in the Hanford tanks is made up of highly radioactive cesium, strontium and various other toxic chemicals left over from the World War II bomb works. Some 53 million gallons were stored in 177 underground tanks, some of which have leaked an estimated 1 million gallons into the surrounding soil of the Columbia Basin.
The U.S. Department of Energy now wants to empty and close 40 single-shelled Hanford tanks by 2006. Critics of the department and state ecology officials are concerned that this could be too hasty an agenda and divert energy or resources from the massive cleanup effort still needed to protect against further environmental contamination.
Brockman, Fredrickson and their colleagues piggybacked their microbial studies on efforts by DOE and its waste tank managers to track the leaks. They asked to study sediment samples collected in 2000 from boreholes dug around one of the leaking tanks.