A local authority must ensure that each sample is analysed in accordance with this paragraph.

For each parameter specified in the first column of Table 1 in Part 2 of this Schedule, the method of analysis is specified in the second column of that Table.

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The method of analysis used for odour and taste parameters must be capable of measuring values equal to the parametric value with a precision F3or uncertainty of measurement of 1 dilution number at 25°C.

For the parameters set out in Table 3 in Part 2 of this Schedule, the specified performance characteristics are that the method of analysis used must be capable of measuring concentrations equal to the parametric value with a limit of quantification, as defined in Article 2(2) of Commission Directive 2009/90/EC laying down technical specifications for chemical analysis and monitoring of water status, of 30% or less of the relevant parametric value and an uncertainty of measurement as specified in that Table.

The result must be expressed using at least the same number of significant figures as for the parametric value quoted and in the same units laid down in these Regulations.

The uncertainty of measurement laid down in Table 3 in Part 2 of this Schedule must not be used as an additional tolerance to the parametric values set out in Schedule 1.