Background monitoring
14.—(1) The Scottish Ministers must operate background sampling points to provide the indicative measurements of—
(a)concentrations of—
(i)arsenic, cadmium, nickel and benzo(a)pyrene;
(ii)the polycyclic aromatic hydrocarbons referred to in paragraph (1) of regulation 13;
(iii)total gaseous mercury.
(b)total depositions of—
(i)arsenic, cadmium, nickel and benzo(a)pyrene within the PM10 fraction;
(ii)the polycyclic aromatic hydrocarbons referred to in paragraph (1) of regulation 13;
(iii)mercury.
(2) For the purposes of paragraph (1) the Scottish Ministers must ensure that—
(a)at least one sampling point is installed for every 100,000 km2 ; and
(b)each sampling point is located in accordance with Sections I to III of Annex III to Directive 2004/107/EC.