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Radium Removal | Fond Du Lac, Wis. | Layne Christensen | Radionuclides
In 2006, the city of Fond du Lac, Wis., contracted an extensive hydrogeologic study to ascertain the long-term sustainable yield of the city's north and south wellfields, which are completed in the deep sandstone aquifer. The study was designed to help the city evaluate whether it should continue to obtain its municipal water supply from the aquifer, requiring treatment for elevated radionuclide concentrations, or develop a surface water treatment plant to obtain water from Lake Winnebago. Ultimately, the city decided to continue using the deep sandstone aquifer.
The city contracted with Strand Associates, Inc., Madison, Wis., to design radium removal facilities capable of complying with the radionuclides rule while providing up to 15.4 million gal per day (mgd) of potable water for the city’s population of 42,000.
After one year of pilot tests that compared competing technologies, Layne-Northwest provided Strand with design specifications for inclusion in the overall system design. The treatment scheme was based on filtration with DOWEX Radium Selective Complexer (RSC) , a radium selective adsorption media.
Under a 10-year service agreement, the company also provides training, removal, replacement and disposal services for the RSC filter media. In addition, the company provides radiation safety officer services and has designed the radiation safety program for the city.