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Improving Access to Tank C-107
Installation of the Mobile Arm Retrieval System (MARS) into Hanford single-shell tank C-107 took another step forward on December 19, 2010 when Tank Farms contractor Washington River Protection Solutions (WRPS) and its subcontractors safely cut a 55-inch diameter hole in the top of the tank. The hole was cut through 15 inches of concrete and steel rebar in order to place a new riser for the MARS unit that will be used to remove approximately 247,000 gallons of radioactive and chemical waste.
 

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