Paragraph 2 TritiumI1

must carry out monitoring where an anthropogenic source of tritium or other artificial radionuclides is present within the catchment area and it cannot be shown on the basis of other surveillance programmes or investigations, including any risk assessment carried out in accordance with regulation 6, that the level of tritium is below the parametric value listed in the radioactive substances parameters table; and

must carry out an investigation of the presence of other artificial radionuclides if the concentration of tritium exceeds the parametric value listed in the radioactive substances parameters table.

it must be carried out at the frequencies as set out for monitoring for Group B parameters in Table 3 in Part 2 of Schedule 2; or

it must (in the case of a private water supply falling within the scope of regulation 11(1)) be carried out at least every 5 years or more frequently if the risk assessment referred to under sub-paragraph (1)(a) shows this to be necessary.