The Air Quality Limit Values (Scotland) Regulations 2003 No. 428

SCHEDULE 2 TARGET VALUES AND LONG-TERM OBJECTIVES FOR OZONE CONCENTRATIONS IN AMBIENT AIR

PART I DEFINITIONS AND INTERPRETATION

1.1  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 80 (g/m³ (which equals 40 parts per billion) and 80 (g/m³ over a given period using only the 1 hour values measured between 8:00 and 20:00 Central European Time each day;

(e) 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 10.