The Water Supply (Water Quality) (Scotland) Regulations 2000

< Previous | Contents | Next >

Regulation 37

SCHEDULE 5
[AMENDMENT OF THE WATER SUPPLY (WATER QUALITY) (SCOTLAND) REGULATIONS 1990]

The amendments to the 1990 Regulations referred to in regulation 37 are -

(a) after regulation 13, the insertion of the following regulation—

"Frequency of sampling for particular organisms and substances

1.1.8

1.1.9 13A.–(1) In each of the years 2001, 2002 and 2003 a water authority shall take, or cause to be taken, from its sampling points or, as the case may be, its supply points, for analysis for testing against the concentrations and values specified in column (2) of Table 4A for the organisms and substances listed in column (1) of that Table, not less than the number of samples specified in paragraphs (2) and (3).

1.1.10

1.1.11 (2) In respect of supply points and the supply of a volume of water within a range shown in column (3) of that Table, not less than the number of samples shown in column (4) of that Table as applicable to a volume within that range.

1.2

1.2.1 (3) In respect of sampling points and the supply of water to an estimated population within a range shown in column (5) of that Table, the number of samples shown in column (6) of that Table as applicable to a population within that range.

1.2.2

1.2.3 (4) In each of those years samples shall be taken at regular intervals throughout the year.";

1.2.4

1.3 (b) after regulation 20, the insertion of the following regulation:—

1.4

1.5 "Additional testing for particular parameters

1.6 20A. The samples taken in accordance with regulation 13 shall additionally be tested against the concentrations specified in column (2) of Table 4B.";

1.7 (c) in regulation 21 (collection and analysis of samples)

(i) in paragraph (2), the insertion, after "means", of "subject to paragraph (3)"; and

(ii) the addition, at the end, of the following -

"(3) In relation to each of the parameters and other substances listed in column (1) of Table 4B, paragraph (2)(d) shall have effect as if for sub-paragraph (iii) there were substituted the requirements of regulation 21A."

1.7.1 (d) after regulation 21, the insertion of the following regulations:

1.7.2

1.7.3 "Method of analysis of samples for particular parameters and substances

1.7.4

1.7.5 21A.– (1) The method of analysis used for testing for a parameter or other substance listed in column (1) of Table 4B against the concentrations in column (2) of that Table must be capable, at the time of use

1.7.6

1.7.7 (a) of measuring concentrations with the trueness and precision specified in relation to that parameter or substance in columns (3) and (4) of Table 4B; and

1.7.8

1.7.9 (b) of detecting the parameter or substance at the limit of detection specified in relation to it in column (5) of that Table.

1.8 (2) In paragraph (1)—

"limit of detection" means—

(a) three times the relative within batch standard deviation of a natural sample containing a low concentration of the parameter or substance; or

(b) five times the relative within batch standard deviation of a blanksample;

"precision" (the random error); means the standard deviation (within a batch and between batches) of the spread of result about the mean;

"trueness" (the systematic error) means the difference between the mean value of a large number of repeated measurements and the true value."; and

1.8.1 (e) the insertion, after Table 4 in Schedule 3, of the following Tables:—

"TABLE 4A

SAMPLING FOR PARTICULAR ORGANISMS AND SUBSTANCES

*where the water originates from, or is influenced by, surface waters

TABLE 4B

METHODS OF ANALYSIS FOR PARTICULAR PARAMETERS AND OTHER SUBSTANCES

* The performance characteristics apply to the individual substances specified at 50% of the concentration in column (2).".

< Previous | Contents | Next >