The Air Quality Standards (Amendment) Regulations (Northern Ireland) 2017

Amendment of Schedule 1 (sampling points, etc.)

4.  In Part 3 of Schedule 1 (microscale siting of sampling points)—

(a) In paragraph 9, for sub-paragraphs (a), and (b), substitute—

“(a) the flow around the inlet sampling probe shall be unrestricted (in general free in an arc of at least 270° or 180° for sampling points at the building line) without any obstructions affecting the airflow in the vicinity of the inlet (normally some metres away from buildings, balconies, trees and other obstacles and at least 0.5 m from the nearest building in the case of sampling points representing air quality at the building line);

(b) in general, the inlet sampling point shall be between 1.5 m (the breathing zone) and 4 m above the ground. Higher siting may also be appropriate if the station is representative of a large area and any derogations should be fully documented;”;

(b) In paragraph 9, for sub-paragraph (e), substitute—

“in relation to the location of traffic-orientated samplers, sampling points must be at least 25 m from the edge of major junctions and no more than 10 m from the kerbside. A “major junction” is a junction which interrupts the traffic flow and causes different emissions (due to vehicles stopping and starting) from the rest of the road.”; and

(c) After paragraph 10, insert—

“11.   Any deviation from the criteria listed in this Part shall be documented in accordance with Part 4.”.