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A COMPARISON OF RADON INDOOR MEASUREMENTS WITH INTERPOLATED RADON SOIL GAS VALUES USING THE INVERSE WEIGHTING METHOD
F Kabrt1,2, A Baumgartner2, M Stietka2
1Austrian Agency for Health and Food Safety, Spargelfeldstraße 191, A-1220 Vienna/Wieningerstrasse 8, A-4020 Linz, Austria.
Abstract:
The European Basic Safety Standards demand the prediction of areas where a significant number of households exceed the reference level for the radon activity concentration. Therefore, radon maps are established which are based on indoor and soil gas measurements. In this study results of soil gas measurements are interpolated to get a value for the radon activity concentration in the soil gas at the coordinates of an indoor measurement and enable a direct comparison of both results. For the interpolation the inverse weighting value is applied. This way a prediction of the indoor radon activity concentration at the location of indoor measurements is attempted for verification. Quotients between the radon activity concentration in soil gas and indoors are analyzed. Building characteristics are also taken into account to evaluate parameters which lead to the reference level being exceeded. The results assist in the interpretation of soil gas measurements regarding the prediction of indoor radon activity concentrations.
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