814.501RPOFederal Council OrdinanceJan 1, 2018Original source
The threshold level at radon-exposed workplaces is the radon gas concentration which, if exceeded, requires measures to be taken in accordance with Article 167.
For the annual average radon gas concentration at radon-exposed workplaces, a threshold level of 1000 Bq/m3applies.
Workplaces at which the threshold level is certainly or presumably exceeded are considered to be radon-exposed. These are, in particular, workplaces in underground structures, mines, caverns and water supply installations, as well as those classified as radon-exposed by the supervisory authority.
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