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The Air Quality Standards Regulations 2010
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- UK Statutory Instruments
- 2010 No. 1001
- SCHEDULE 3
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Regulation 18(1)
SCHEDULE 3Target values
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Ozone
| Objective | Averaging period | Target value |
|---|---|---|
(1) The maximum daily eight hour mean concentration shall be selected by examining eight hour running averages, calculated from hourly data and updated each hour. Each eight hour average so calculated shall be assigned to the day on which it ends, that is, the first calculation period for any one day will be the period from 17:00 on the previous day to 01:00 on that day. The last calculation period for any one day will be the period from 16:00 to 24:00 on the day. | ||
(2) If the three or five year averages cannot be determined on the basis of a full and consecutive set of annual data, the minimum annual data required for checking compliance with the target values will be valid data for one year in relation to the target value for the protection of human health and valid data for three years in relation to the target value for the protection of vegetation. | ||
| Protection of human health | Maximum daily eight hour mean(1) | 120 μg/m3 not to be exceeded on more than 25 days per calendar year averaged over three years(2) |
| Protection of vegetation | May to July | AOT 40 (calculated from 1 h values) 18,000 μg/m3 ∙h averaged over five years(2) |
PM 2.5
| Averaging period | Target value |
|---|---|
| Calendar year | 25 μg/m3 |
Arsenic, cadmium, nickel and benzo(a)pyrene
| Pollutant | Target value for the total content in the PM10 fraction averaged over a calendar year | Date by which target value should be met |
|---|---|---|
| Arsenic | 6 ng/m3 | 31st December 2012 |
| Cadmium | 5 ng/m3 | 31st December 2012 |
| Nickel | 20 ng/m3 | 31st December 2012 |
| Benzo(a)pyrene | 1 ng/m3 | 31st December 2012 |
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