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STUK supervises

Workplaces built on highly permeable soils, where radon measurement in the workplace is required

Workplaces built on highly permeable soils, where radon measurement in the workplace is required

Indoor radon levels above the reference value are common in buildings built on sand and gravel soils

The most significant source of radon in indoor air in workplaces is the soil beneath the building. Buildings are often depressurised, so small amounts of replacement air are absorbed directly from the soil into the building through gaps in the foundation. If the soil beneath the building is highly permeable to air, radon will also be effectively transported into the building. Radon concentrations above the reference value are common throughout Finland in buildings located on sandy or gravel soils.

So, gravel and sand are the most permeable soils. Workplaces located on ridges and gravel areas are often easy to identify by looking at the landscape around the workplace. In cases of doubt, it is advisable to use the GTK map data. This can be used to check whether the workplace is located in such an area.

Use the GTK's Geodata service to find out whether the building is located on an air-permeable gravel or sand formation

 

Contact

Contact

  • Katja Kojo / Senior Inspector
    Tel. +358 975 988 472