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The Air Quality (Ozone) Regulations (Northern Ireland) 2003

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Classification of zones

6.—(1) The Department shall classify each zone in relation to ozone according to whether ambient air quality for ozone is required to be assessed by –

(a)fixed continuous measurement; or

(b)a combination of measurement campaigns of short duration and results from emissions inventories and modelling.

(2) Fixed continuous measurement must be used to assess ambient air quality in relation to ozone in a zone if within the last five years concentrations of ozone in that zone have exceeded a long-term objective.

(3) A combination of measurement campaigns of short duration, at times and locations likely to be typical of the highest pollution levels, and results from emissions inventories and modelling, may be used to assess ambient air quality in relation to ozone in a zone if fewer than five years' data are available to determine exceedances.

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