8.—(1) For the purpose of determining whether water to which this Part applies, satisfies the provisions of Part 3 or, if a departure has been authorised under Part 8 in relation to that supply, those provisions as read with the terms of that authorisation, a water undertaker must take, or cause to be taken, and analyse, or cause to be analysed, not less than the number of samples of the water within each of its water supply zones specified in, or in accordance with provisions of, this Part.
(2) Except in a case to which paragraph (3) applies, the parameters listed in Tables A and B in Schedule 1 and the indicator parameters in Schedule 2 must be subject—
(a)to Group A monitoring in the circumstances specified in column (3) of Table 1 in Schedule 3; and
(b)in any other case, Group B monitoring.
(3) Where—
(a)the distribution of water in any part of a water supply zone is by tanker; and
(b)it is or is likely to be an intermittent short-term supply,
samples of water from each tanker from which water is distributed must be taken 48 hours after the commencement of the distribution from that tanker and every 48 hours thereafter until the distribution is discontinued.
(4) Of the samples taken in accordance with paragraph (3) in relation to each distribution, the first must be analysed for compliance with the parameters Escherichia coli (E. coli), and conductivity (item 2 in Table A in Schedule 1, and item 6 in Schedule 2, respectively), and the second and any subsequent samples must be analysed for compliance with those and every other parameter.
(5) The copper, lead and nickel parameters and, subject to regulation 19, the parameters relevant to radioactivity (indicative dose, radon, and tritium), must be monitored in such manner as the Department may determine and specify by notice in writing given to a water undertaker.
(6) A water undertaker may use a screening strategy for gross alpha and gross beta to monitor for the parametric indicator value for indicative dose.
(7) Indicative dose must be monitored in accordance with Schedule 5.