9.—(1) Where a survey of any waters classified for the purposes of these Regulations shows that the values obtained for any parameters are considerably superior to—
(a)the quality required by Schedule 1, or
(b)the standard adopted by the Department as a result of regulation 5 in relation to the waters,
the Department may reduce the frequency of sampling of the waters in relation to that parameter or standard.
(2) The Department may decide that regular sampling and analysis of waters classified under these Regulations is not needed if—
(a)the requirements of paragraph (1) are satisfied in relation to the waters;
(b)there is no pollution of the waters;
(c)there is no risk of the quality of the waters deteriorating; and
(d)the quality of the waters is superior to the minimum required for waters classified as DW1.