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2.—(1) Where screening is carried out for certain radionuclides or for an individual radionuclide, the monitoring local authority must carry out an analysis of additional radionuclides if, in relation to any supply referred to in paragraph 1—
(a)one of the activity concentrations of a radionuclide listed in column 2 of the table below exceeds 20% of the corresponding derived concentration in column 3; or
(b)the tritium concentration exceeds the prescribed concentration or value for tritium.
(2) The monitoring local authority must, in deciding which radionuclides require to be measured for each supply, take into account all relevant information about likely sources of radioactivity.
1 This table includes values for the most common natural and artificial radionuclides. These are precise values, calculated for a dose of 0.1 mSv, an annual intake of 730 litres and using the dose coefficients laid down in Table (A) of Annex III to Council Directive 96/29/Euratom laying down basic safety standards for the protection of the health of workers and the general public against the dangers arising from ionizing radiation F2. Derived concentrations for other radionuclides may be calculated on the same basis. | ||
2 This allows only for the radiological properties of uranium, not for its chemical toxicity.] | ||
Derived concentrations for radioactivity in water intended for human consumption1 | ||
---|---|---|
Origin | Radionuclide | Derived concentration (Bq/1) |
Natural | U-2382 | 3.0 |
U-2342 | 2.8 | |
Ra-226 | 0.5 | |
Ra-228 | 0.2 | |
Pb-210 | 0.2 | |
Po-210 | 0.1 | |
Artificial | C-14 | 240 |
Sr-90 | 4.9 | |
Pu-239 / Pu-240 | 0.6 | |
Am-241 | 0.7 | |
Co-60 | 40 | |
Cs-134 | 7.2 | |
Cs-137 | 11 | |
I-131 | 6.2 | |
Notes |
Textual Amendments
F1Sch. 5A inserted (28.11.2015) by The Private and Public Water Supplies (Miscellaneous Amendments) (Scotland) Regulations 2015 (S.S.I. 2015/346), regs. 1(1), 12
F2OJ L 159, 29.6.1996, p. 1, as amended by Corrigendum (OJ L 314, 4.12.1996, p. 20).
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