This section has no associated Explanatory Memorandum
4. If the following formula is satisfied, the indicative dose is considered to be less than the parametric value of 0.1 mSv and no further investigation is required—N.I.
where
Ci(obs) = observed concentration radionuclide i
Ci(der) = derived concentration of radionuclide i
n = number of radionuclides detected