Textual Amendments
F1Sch. 3A inserted (14.4.2016) by The Water Supply (Water Quality) (Amendment) Regulations 2016 (S.I. 2016/410), reg. 1(1), 7, Sch. 2
3.—(1) In relation to the indicative dose (“ID”) parameter in the radioactive substances parameters table, a water undertaker must carry out monitoring where a source of artificial radioactivity or elevated natural radioactivity is present in a water supply zone and it cannot be shown on the basis of other surveillance programmes or investigations, including any risk assessment carried out in accordance with regulation 28, that the level of ID is below the parametric value listed the radioactive substances parameters table.
(2) Where monitoring is required by sub-paragraph (1) in relation to artificial radionuclides samples must be taken in accordance with regulation 9(1) and (3).
(3) Where monitoring is required by sub-paragraph (1) in relation to a source of elevated natural radioactivity—
(a)the Welsh Ministers must specify, by notice in writing to the water undertaker, the frequency of the monitoring required of—
(i)gross alpha activity;
(ii)gross beta activity; or
(iii)individual natural radionuclides,
depending on the screening strategy adopted by the water undertaker pursuant to Schedule 5; and
(b)the frequency of monitoring required under sub-paragraph (a) may vary from a single check measurement to the frequencies required for sampling in accordance with regulation 9(1).
(4) Where a single check for natural radioactivity is specified under paragraph (3)(a), the water undertaker must carry out a further check if any change occurs in relation to the supply which is likely to influence the concentrations of radionuclides in the supply.]