Results of the Measurement of Depth Distribution of Radioactive Substances in Soil in the Model Area (around Yamakiya District of Kawamata Town) ( From June 2011 to August 2011 ) Results of the Measurement of Depth Distribution of Radioactive Substances in Soil in the Model Area (around Yamakiya District of Kawamata Town) ( From June 2011 to August 2011 )