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Directive 2008/50/EC of the European Parliament and of the CouncilShow full title

Directive 2008/50/EC of the European Parliament and of the Council of 21 May 2008 on ambient air quality and cleaner air for Europe

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ANNEX XIU.K.LIMIT VALUES FOR THE PROTECTION OF HUMAN HEALTH

A.CriteriaU.K.

Without prejudice to Annex I, the following criteria shall be used for checking validity when aggregating data and calculating statistical parameters:

a

The requirements for the calculation of annual mean do not include losses of data due to the regular calibration or the normal maintenance of the instrumentation.

ParameterRequired proportion of valid data
One hour values75 % (i.e. 45 minutes)
Eight hours values75 % of values (i.e. 6 hours)
Maximum daily 8-hour mean75 % of the hourly running eight hour averages (i.e. 18 eight hour averages per day)
24-hour values75 % of the hourly averages (i.e. at least 18 hour values)
Annual mean90 %a of the one hour values or (if not available) 24-hour values over the year

B.Limit valuesU.K.

a

Already in force since 1 January 2005

b

The maximum daily eight hour mean concentration will 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 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 that day.

c

Already in force since 1 January 2005. Limit value to be met only by 1 January 2010 in the immediate vicinity of the specific industrial sources situated on sites contaminated by decades of industrial activities. In such cases, the limit value until 1 January 2010 will be 1,0 µg/m3. The area in which higher limit values apply must not extend further than 1 000 m from such specific sources.

Averaging PeriodLimit valueMargin of toleranceDate by which limit value is to be met
Sulphur dioxide
One hour350 µg/m3, not to be exceeded more than 24 times a calendar year150 µg/m3 (43 %)a
One day125 µg/m3, not to be exceeded more than 3 times a calendar yearNonea
Nitrogen dioxide
One hour200 µg/m3, not to be exceeded more than 18 times a calendar year50 % on 19 July 1999, decreasing on 1 January 2001 and every 12 months thereafter by equal annual percentages to reach 0 % by 1 January 20101 January 2010
Calendar year40 µg/m350 % on 19 July 1999, decreasing on 1 January 2001 and every 12 months thereafter by equal annual percentages to reach 0 % by 1 January 20101 January 2010
Benzene
Calendar year5 µg/m35 µg/m3 (100 %) on 13 December 2000, decreasing on 1 January 2006 and every 12 months thereafter by 1 µg/m3 to reach 0 % by 1 January 20101 January 2010
Carbon monoxide
maximum daily eight hour meanb10 mg/m360 %a
Lead
Calendar year0,5 µg/m3 c100 %c
PM10
One day50 µg/m3, not to be exceeded more than 35 times a calendar year50 %a
Calendar year40 µg/m320 %a

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