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Directive 2004/107/EC of the European Parliament and of the CouncilDangos y teitl llawn

Directive 2004/107/EC of the European Parliament and of the Council of 15 December 2004 relating to arsenic, cadmium, mercury, nickel and polycyclic aromatic hydrocarbons in ambient air

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ANNEX IIDetermination of requirements for assessment of concentrations of arsenic, cadmium, nickel and benzo(a)pyrene in ambient air within a zone or agglomeration

I.Upper and lower assessment thresholds

The following upper and lower assessment thresholds will apply:

ArsenicCadmiumNickelB(a)P
Upper assessment threshold in percent of the target value

60 %

(3,6 ng/m3)

60 %

(3 ng/m3)

70 %

(14 ng/m3)

60 %

(0,6 ng/m3)

Lower assessment threshold in percent of the target value

40 %

(2,4 ng/m3)

40 %

(2 ng/m3)

50 %

(10 ng/m3)

40 %

(0,4 ng/m3)

II.Determination of exceedances of upper and lower assessment thresholds

Exceedances of upper and lower assessment thresholds must be determined on the basis of concentrations during the previous five years where sufficient data are available. An assessment threshold will be deemed to have been exceeded if it has been exceeded during at least three calendar years out of those previous five years.

Where fewer than five years’ data are available, Member States may combine measurement campaigns of short duration during the period of the year and at locations likely to be typical of the highest pollution levels with results obtained from information from emission inventories and modelling to determine exceedances of the upper and lower assessment thresholds.

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