Different aspects of the geogenic radon potential in a coal mining area in south-western Germany arediscussed. Due to the rather low specific radium activities of rocks and soils varying between 10 and70 Bq/kg a low geogenic radon potential can be expected. Radon concentrations in soil gas inabandoned mining areas are characterized by a lognormal distribution with a median value of 20kBq/m3. In the neighboring area with deep mining generally younger than two years, radon contentsincrease up to a median value of 38 kBq/m3.
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