10. The screening levels are activity concentrations that can be used to demonstrate if the IDC may be exceeded. If either of the screening levels are exceeded, the activity concentrations of individual radionuclides should be determined and compared with the guidance levels (see Table 1 below).
11. The guidance levels of radionuclide concentration in drinking water shall be established as listed below in Table 1.
The guidance levels are for individual radionuclides and are the concentration that, if present in the drinking-water consumed throughout a year at a rate of 2 liters per day, would result in an individual dose of 0.1 mSv being received.