B033 MONITORING AN ALTERNATIVE DE-ICER IN SALT CONTAMINATED AQUIFER USING ERT Summary 1 A new de-icer potassium formate was tested at a salt (NaCl) contaminated Kauriansalmi aquifer during winter 2002-2003. Electrical resistivity tomography (ERT) data was acquired 2002 and 2003 for mapping the geology of the area and for monitoring the effect of the alternative de-icer on the salt concentration of the groundwater. A 3-D model of the aquifer was formed using information carried out by ERT ground penetrating radar (GPR) borehole drillings and other available data. The bedrock topography model was a valuable tool in the interpretation of the


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