EC on ambient air quality and cleaner air for Europe - Main contents

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dossier	COM(2008)403 - Notifications of postponements of attainment deadlines and exemptions from the obligation to apply certain limit values ...
document	COM(2008)403
date	June 26, 2008

Annex XI during the extension.

20. For 2011, compliance with the annual limit values for PM10 will be assessed against the limit value plus the margin of tolerance for the whole calendar year. As regards the daily limit values, compliance for 2011 will be assessed on a daily basis. More precisely, the total number of exceedances, whether of the limit value plus the margin of tolerance or of the limit value alone, may not exceed the 35 days permitted for that calendar year.

4. 4. First condition – measures to achieve compliance by the initial attainment date

21. Article 22(1) of the new Directive provides that the deadlines for attainment of the limit values for nitrogen dioxide and benzene may be postponed where conformity with the limit values cannot be achieved by the attainment date, i.e. 1 January 2010. In order to determine whether compliance cannot be achieved by that date, Member States are requested to indicate the measures taken before 2010 in accordance with Article 4(1) of Directive 1999/30/EC and Article 3(1) of Directive 2000/69/EC and explain the reasons why those measures do not bring about compliance[8]. It follows from the objectives of the air quality legislation in general that appropriate action must be taken in the period preceding the date on which the limit values become mandatory. Only if it can be shown that efforts have been made to achieve compliance, Member States can claim, in accordance with Article 22(1), that conformity with the limit values cannot be achieved by the deadlines.

22. For PM10, Member States must, according to Article 22(2), demonstrate that all appropriate measures have been taken at national, regional and local level to achieve compliance with the limit values by the initial deadline set for attainment, i.e. 1 January 2005. Information must therefore be given of the measures taken with a view to achieving compliance by that date8. To enable the Commission to determine whether those measures were appropriate, Member States must identify the pollution sources that those measures were intended to address and explain the extent to which those measures actually contributed to reducing concentrations. Explanations must be given of any remaining exceedance of the limit values[9]. Those explanations must include information on whether the exceedance can be attributed to any of the specific conditions for the exemption, i.e. site-specific dispersion characteristics, adverse climatic conditions or transboundary contributions.

23. In its assessment, the Commission will also take into account the impact of correct transposition and implementation of the Directives listed in Section 2 of Part B of Annex XV[10] and of timely availability of the plan or programme in accordance with Article 8(3) of Council Directive 96/62/EC on ambient air quality assessment and management[11].

4. 5. Second condition – measures to achieve compliance before the new deadline

24. Member States must provide realistic and reliable predictions of how concentrations are likely to decline with a view to achieving compliance with the limit values before the new deadline. Those predictions should also indicate that exceedances during the extension will remain below the limit value plus the maximum margin of tolerance provided for in Annex XI to the Directive.

25. The predictions must be based on a comparison between the limit values to be achieved and projected baseline levels for the exceedance situation in a zone or agglomeration. The baseline must indicate the estimated concentrations by the new deadline if no additional abatement measures are taken, apart from those taken to achieve compliance by the initial deadline and the existing and planned Community measures. The gap between the applicable limit value and the baseline will serve as an indicator for the expected impact and timing of the additional measures required in order to close that gap by the new deadline[12].

26. When identifying the measures required, consideration must be given to the measures listed in Section 3 of Part B of Annex XV as provided for in the Directive. If any of those measures are not to be implemented, even though they are relevant to the sources identified, a due justification must be given[13].

27. When assessing the predictions, account will also be taken of the potential impact, in the zone concerned, of existing and planned Community measures, and Member States are asked to include their estimate of that impact in the baseline. The planned Community measures are those indicated in the Declaration by the Commission published together with the Directive. The Commission intends to assess the quantification provided by the Member States and, where necessary, the underlying assumptions, and to carry out its own assessment of this criterion on that basis. As regards the existing measures, the assessment will focus on the status of implementation of the Directives listed in Part B of Annex XV[14].

4. 6. Specific condition for PM 10 : site-specific dispersion characteristics, adverse climatic conditions or transboundary contributions

4. 6.1 Site-specific dispersion characteristics

28. Site-specific dispersion characteristics are factors affecting pollutant dispersion on local scale, principally at street level. Local buildings or small-scale topographical structures result in locally emitted pollutants accumulating in a limited area, which causes high concentrations. Such areas can normally be found in so-called “street canyons”. Site-specific dispersion characteristics may be claimed only where it can be demonstrated that the exceedance occurs locally in such specific areas and not elsewhere, such as in the urban background or along less densely built-up streets in the same air quality zone or agglomeration.

29. In areas where there are situations such as the following, site specific dispersion characteristics are considered to be present:

(a) continuous multi-storey buildings along both sides of the street;

(b) the average height of the buildings over a length of at least 100 metres must be greater than the total width of the street divided by 1.5[15].

30. To demonstrate that the exceedance is restricted to an area in which site-specifc dispersion characteristics are present, data from appropriate urban traffic monitoring stations outside that area must be used or, where appropriate, results from small-scale dispersion modelling[16]. A map of the zone, indicating the different measuring stations and the area of exceedance, should, where available, also be supplied[17].

31. If other indicators are used to demonstrate that the exceedance is restricted to an area in which site-specific dispersion characteristics are present, reasons must be given and it must be demonstrated that the use of those indicators produces equivalent results.

4.6.2 Adverse climatic conditions

32. Adverse climatic conditions are considered to exist when the long-term meteorological conditions and the topographical conditions affect dilution of locally emitted pollutants, thereby causing high concentrations.

33. In areas where the presence of factors such as the following can be shown, adverse climatic conditions are considered to be present:

(a) the local to regional topography, i.e. locations in valleys or where surrounded by high mountains;

(b) poor dilution of locally emitted pollutants due to low wind speeds;

(c) vertical mixing, i.e. dilution, triggered by meteorological parameters related to mechanical and thermal turbulence of the atmosphere;

(d) air masses of oceanic versus continental origin; continental air masses are usually linked to adverse dispersion characteristics (temperature inversion and low wind speed).

34. General climatic conditions, such as temperature, precipitation or snowfall, which do not directly influence pollutant dispersion but may induce specific human activities and thereby influence the level of emissions, such as domestic heating, power generation for heating or air conditioning, or use of studded tyres, are not considered adverse climatic conditions for the purposes of the new Directive.

35. Accumulation of pollution in areas affected by adverse climatic conditions usually occurs during calms. An indication of low annual average wind speed, below 1.5 m/s, in such areas is therefore appropriate for demonstrating that this condition is met. Other indicators than average wind speed may also be used provided that a justification is given.

36. In order to claim adverse climatic conditions, Member States must demonstrate that the daily limit values are exceeded principally when the adverse climatic conditions described occur. Such a correlation can be demonstrated by the PM10 concentrations and average wind speeds measured on days when the limit value was exceeded, at least for the reference year[18].

4.6.3 Transboundary contributions

37. Transboundary contributions occur where the meteorological and topographical conditions permit the transport of anthropogenic pollution originating outside the Member State, thereby causing high concentrations. Such contributions may originate either in close proximity to zones and agglomerations close to a national border (short-range transboundary pollution) or at longer distances of some 100 kilometres or more (long-range transboundary pollution).

38. Long-range transboundary pollution occurs mainly in flatlands or non-mountainous terrain often subject to accumulation of pollutants advected in continental air masses. High concentrations in basins or valleys or leeward of mountains are generally not affected by such contributions.

39. Pollution can originate from a single source across the border, from one or more Member States together, from shipping or from sources outside the Community.

40. Member States claiming a transboundary contribution must indicate whether consultations have been held with the Member State in which the pollution originates, in accordance with Article 8(6) of Directive 96/62/EC (Article 25 of the new Directive). If no such consultations have taken place, despite the origin of the pollution being known, the Member State concerned may be considered not to have taken all appropriate measures to meet the original deadline. If the pollution originates in several Member States or in third countries and it is clear that effective solutions could not be found by bilateral consultations, the Member State’s right to an extension will not be affected by the lack of consultations[19].

41. Transboundary contributions can be assessed either by measurements or by modelling. Such assessments must, where appropriate, be supplemented by backward trajectory analysis and source apportionment of individual exceedances. Methods such as the following have proven efficient in demonstrating transboundary contributions:

(a) atmospheric dispersion modelling with appropriate spatial and daily temporal resolution;

(b) analysis of daily measurement data, identifying transboundary contributions by means of measurements from representative monitoring sites, e.g. rural background sites located upwind in the area surrounding the zone or agglomeration in which the exceedance has been observed;

(c) EMEP model[20].

42. In order to claim transboundary contributions as a cause for the exceedance it must be demonstrated that, in cases where the annual limit value is exceeded, once the transboundary contribution is subtracted, the annual average concentration is below the limit value. If the daily limit value is exceeded, it must be demonstrated that, once the transboundary contribution on specific days is subtracted, the daily average concentrations remain below the limit value[21].

43. If other indicators are used to demonstrate that transboundary contributions are the cause of the exceedance, reasons must be given and it must be demonstrated that use of those indicators produces equivalent results.

5. Air quality plan and additional information requirements

44. Notifications must be accompanied by an air quality plan for the zone or agglomeration concerned. The plan must comply with the requirements laid down in Article 23 and in Part A of Annex XV to the new Directive. The information requested under the new Directive is largely similar to that requested under Directive 96/62/EC. As a consequence, Member States which already have a plan or programme in place can use it for the purposes of the notification, provided it meets the criteria laid down in Part A of Annex XV to the new Directive and is appropriately updated to ensure that conformity will be achieved with the limit values before the new deadline.

[1] OJ L 152, 11.6.2008, p. 1.

[2] Directive 1999/30/EC of the European Parliament and of the Council relating to limit values for sulphur dioxide, nitrogen dioxide and oxides of nitrogen, particulate matter and lead in ambient air (OJ L 163, 29.6.1999, p. 4)

[3] Directive 2000/69/EC of the European Parliament and of the Council relating to limit values for benzene and carbon monoxide in ambient air (OJ L 313, 13.12.2000, p. 12).

[4] Idem

[5] OJ L 68, 6.3.2004, p. 27.

[6] The notification must be marked “Air quality time extension – Directive 2008/50/EC” and must, in order to be valid as an official notification, be addressed to: European Commission, Secretariat-General, 1049 Brussels. In addition, an electronic copy of the notification should be sent by e-mail to the mailbox: ENV-AIRQUALITYTIMEEXTENSION@ec.europa.eu

[7] See Form 3A in SEC (..) …

[8] See Form 5A, including the Annex, and Form 7, including Annex A; for PM10 see also Form 10, and for nitrogen dioxide and benzene notified before 2010, see Form 4A.

[9] See Form 3B and 4A (as appropriate).

[10] See Form 8 and, as appropriate, the Annex to Form 8 and Form 9.

[11] OJ L 296, 21.11.1996, p. 55.

[12] See Form 4B and Form 5B, including the Annex.

[13] See Form 6.

[14] See Form 9.

[15] Meta-data management and transmission in accordance with Decision 97/101/EC on the exchange of information.

[16] See f Form 10.

[17] See Annex to Form 2.

[18] See Form 10.

[19] See Form 10.

[20] Model developed by the Cooperative Programme for Monitoring and Evaluation of the Long-range Transmission of Air Pollutants in Europe (EMEP).

[21] See Forms 3A and 10.