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(a) to establish limit values for concentrations of benzene and carbon monoxide in ambient air intended to avoid, prevent or reduce harmful effects on human health and the environment as a whole; (b) to assess concentrations of benzene and carbon monoxide in ambient air on the basis of common methods and criteria; (c) to obtain adequate information on concentrations of benzene and carbon monoxide in ambient air and ensure that it is made available to the public; (d) to maintain ambient air quality where it is good and improve it in other cases with respect to benzene and carbon monoxide.
Directive 2000/69/EC of the European Parliament and of the Council of 16 November 2000 relating to limit values for benzene and carbon monoxide in ambient air
Modified by
- Directive 2008/50/EC of the European Parliament and of the Councilof 21 May 2008on ambient air quality and cleaner air for Europe, 32008L0050, June 11, 2008
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(a) "upper assessment threshold" shall mean a level specified in Annex III, below which a combination of measurements and modelling techniques may be used to assess ambient air quality, in accordance with Article 6(3) of Directive 96/62/EC; (b) "lower assessment threshold" shall mean a level specified in Annex III, below which modelling or objective estimation techniques alone may be used to assess ambient air quality in accordance with Article 6(4) of Directive 96/62/EC; (c) "fixed measurements" shall mean measurements taken in accordance with Article 6(5) of Directive 96/62/EC.
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designates the zones and/or agglomerations concerned; provides the necessary justification for such an extension; demonstrates that all reasonable measures have been taken to lower the concentrations of the pollutants concerned and to minimise the area over which the limit value is exceeded, and outlines the future developments with regard to the measures which it will take according to Article 8(3) of Directive 96/62/EC.
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(a) current air quality and trends up to and beyond the year 2010; (b) the scope for making further reductions to polluting emissions across all relevant sources, taking account of their technical feasibility and cost-effectiveness; (c) the relationships between pollutants and opportunities for combined strategies for achieving Community air quality and related objectives; (d) current and future requirements for informing the public and for the exchange of information between Member States and Commission; (e) the experience acquired in the application of this Directive in Member States including, in particular, the conditions laid down in Annex IV under which measurement has been carried out.
Averaging period | Limit value | Margin of tolerance | Date by which limit value is to be met | |
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Limit value for the protection of human health | Calendar year | 5 μg/m |
5 μg/m |
Averaging period | Limit value | Margin of tolerance | Date by which limit value is to be met | |
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Limit value for the protection of human health | Maximum daily 8-hour mean | 10 mg/m |
6 mg/m |
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(a) Benzene Annual average Upper assessment threshold 70 % of limit value (3,5 μg/m 3 )Lower assessment threshold 40 % of limit value (2 μg/m 3 ) (b) Carbon Monoxide Eight-hour average Upper assessment threshold 70 % of limit value (7 mg/m 3 )Lower assessment threshold 50 % of limit value (5 mg/m 3 )
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(i) to provide data on the areas within zones and agglomerations where the highest concentrations occur to which the population is likely to be directly or indirectly exposed for a period which is significant in relation to the averaging period of the limit value(s); (ii) to provide data on levels in other areas within the zones and agglomerations which are representative of the exposure of the general population.
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the flow around the inlet sampling probe should be unrestricted, without any obstructions affecting the airflow in the vicinity of the sampler (normally some metres away from buildings, balconies, trees and other obstacles and at least 0,5 m from the nearest building in the case of sampling points representing air quality at the building line); in general, the inlet sampling point should be between 1,5 m (the breathing zone) and 4 m above the ground. Higher positions (up to 8 m) may be necessary in some circumstances. Higher siting may also be appropriate if the station is representative of a large area; the inlet probe should not be positioned in the immediate vicinity of sources in order to avoid direct intake of emissions unmixed with ambient air; the sampler's exhaust outlet should be positioned so that recirculation of exhaust air to the sample inlet is avoided; location of traffic-orientated samplers: -
for all pollutants, such sampling points should be at least 25 metres from the edge of major junctions and at least 4 m from the centre of the nearest traffic lane; for carbon monoxide, inlets should be no more than 5 m from the kerbside; for benzene, inlets should be sited so as to be representative of air quality near to the building line.
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interfering sources; security; access; availability of electrical power and telephone communications; visibility of the site in relation to its surroundings; safety of public and operators; the desirability of co-locating sampling points for different pollutants; planning requirements.
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(a) Diffuse sources To include at least one urban-background station and one traffic-oriented station provided this does not increase the number of sampling points. Population of agglomeration or zone (thousands) If concentrations exceed the upper assessment threshold If maximum concentrations are between the upper and lower assessment thresholds 0 -249 1 1 250 -499 2 1 500 -749 2 1 750 -999 3 1 1000 -1499 4 2 1500 -1999 5 2 2000 -2749 6 3 2750 -3749 7 3 3750 -4749 8 4 4750 -5999 9 4 ≥ 6000 10 5 (b) Point sources For the assessment of pollution in the vicinity of point sources, the number of sampling points for fixed measurement should be calculated taking into account emission densities, the likely distribution patterns of ambient air pollution and potential exposure of the population.
Benzene | Carbon monoxide | |
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Uncertainty | 25 % | 15 % |
Minimum data capture | 90 % | 90 % |
Minimum time coverage | ||
Uncertainty | 30 % | 25 % |
Minimum data capture | 90 % | 90 % |
Minimum time coverage | 14 % (one day's measurement a week at random, evenly distributed over the year, or 8 weeks evenly distributed over the year) | 14 % (one measurement a week at random, evenly distributed over the year, or 8 weeks evenly distributed over the year) |
Eight-hour averages | — | 50 % |
Annual averages | 50 % | — |
Uncertainty | 100 % | 75 % |
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a description of assessment activities carried out; the specific methods used, with references to descriptions of the method; the sources of data and information; a description of results, including uncertainties and, in particular, the extent of any area or, if relevant, the length of road within the zone or agglomeration over which concentrations exceed limit value(s) or, as may be, limit value(s) plus applicable margin(s) of tolerance and of any area within which concentrations exceed the upper assessment threshold or the lower assessment threshold; for limit values the object of which is the protection of human health, the population potentially exposed to concentrations in excess of the limit value.