The purpose of this study is to verify the "10 point system" for an evaluation of the soil radon potential, which was proposed by [1]. The "10 point system" was tested at 511 test sites throughout Germany. Devonian to Quaternary sediments, intrusive and extrusive rocks, metamorphic rocks as well as different types of backfill were considered. At each test site, the soil radon potential was calculated first, and then the actual radon concentration of the soil gas was measured at all test sites at a depth of 0.5 m and at 341 test sites at a depth of 0.8 m, too. The two parameters "traffic vibration" and "soil sealing" were not considered. The results of this study show that the predicted soil radon potential has a highly significant positive correlation with the actual measured radon concentration in the soil gas (R~2 of mean values: 0.99).
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