The reference level to which a person may be exposed over one year, excluding radon in buildings, in the context of a polluted site mentioned in article R. 1333-95 is 1 mSv in effective dose over one year.
The effective dose is calculated taking into account the use of the site.
Where man-made radon is present in buildings, the reference level for radon is that set in article R. 1333-28.