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

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PART Idefinitions and interpretation

In this Schedule–

(a)all values shall be expressed in μg/m3;

(b)the volume shall be standardised at the following conditions of temperature and pressure: 293K and 101.3kPa;

(c)the time shall be specified in Central European Time;

(d)“AOT40” (expressed in (μg/m3)·hours) means the sum of the difference between hourly concentrations greater than 80μg/m3 (which equals 40 parts per billion) and 80μg/m3 over a given period using only the 1 hour values measured between 8:00 and 20:00 Central European Time each day;

in order to be valid, the annual data on exceedances used to check compliance with the target values and long-term objectives below must meet the criteria set out in Part II of Schedule 8.

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