Regulations 17(1) and (2),19(2), 24(1) and (4), 25(5), 28(2)
SCHEDULE 2Limit values
Sulphur dioxide
Averaging period | Limit value | | |
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One hour | 350 μg/m3 not to be exceeded more than 24 times a calendar year | | |
One day | 125 μg/m3 not to be exceeded more than 3 times a calendar year | | |
Nitrogen dioxide
Averaging period | Limit value | | |
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One hour | 200 μg/m3 not to be exceeded more than 18 times a calendar year | | |
Calendar year | 40 μg/m3 | | |
Benzene
Averaging period | Limit value | | |
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Calendar year | 5 µg/m3 | | |
| | | |
Carbon monoxide
Averaging period | Limit value | | |
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The maximum daily eight hour mean concentration of carbon monoxide must be selected by examining eight hour running averages, calculated from hourly data and updated each hour. Each eight hour average so calculated will be assigned to the day on which it ends, i.e. the first calculation period for any one day will be the period from 1700 hours on the previous day to 0100 hours on that day, the last calculation period for any one day will be the period from 1600 hours to 2400 hours on that day. |
Maximum daily eight hour mean | 10 mg/m3 | | |
Lead
Averaging period | Limit value | | |
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Calendar year | 0.5 µg/m3 | | |
PM10
Averaging period | Limit value | | |
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One day | 50 µg/m3, not to be exceeded more than 35 times a calendar year | | |
Calendar year | 40 µg/m3 | | |
PM2.5
Averaging period | Limit value | Margin of tolerance | Date by which limit value is to be met |
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Calendar year | 25 µg/m3 | 20% on 11th June 2008, decreasing on the next 1st January and every 12 months thereafter by equal annual percentages to reach 0% by 1st January 2015 | 1st January 2015 |