Annex VII

ANNEX VII

Measurements at monitoring supersites and of mass concentration, chemical composition of PM2,5, ozone precursor substances and ultrafine particles

Section 1 – Measurements of pollutants at monitoring supersites

Measurements at all monitoring supersites at urban background locations and rural background locations shall include the pollutants listed in Tables 1 and 2, respectively.

Table 1 – Pollutants to be measured at monitoring supersites at urban background locations

Table 2 – Pollutants to be measured at monitoring supersites at rural background locations

Table 3 – Pollutants recommended to be measured at monitoring supersites at urban background locations and rural background locations if not covered by the requirements of Tables 1 and 2

Section 2 – Measurements of mass concentration and chemical composition of PM2,5

A. Objectives

The main objectives of such measurements are to ensure that adequate information is made available on levels in urban background locations and rural background locations. That information is essential to judge the enhanced levels in more polluted areas (such as urban background locations, air pollution hotspots, industry related locations or traffic related locations), assess the possible contribution from long-range transport of pollutants, support source apportionment analysis and for the understanding of specific pollutants such as particulate matter. It is also essential for the increased use of modelling applications also in urban areas.

B. Substances

Measurement of PM2,5 shall include at least the total mass concentration and concentrations of appropriate compounds to characterise its chemical composition. At least the list of chemical species given below shall be included.

C. Siting

Measurements shall be taken in urban background locations and rural background locations in accordance with Annex IV.

Section 3 – Measurements of ozone precursor substances

A. Objectives

The main objectives of measurements of ozone precursor substances are to analyse any trend in ozone precursors, to check the efficiency of emission reduction strategies, to check the consistency of emission inventories, to support the understanding of ozone formation and precursor dispersion processes, as well as the application of photochemical models, and to help attribute emission sources to observed pollution concentrations.

B. Substances

Measurement of ozone precursor substances shall include at least nitrogen oxides (NO and NO2), and, as appropriate, methane (CH4) and volatile organic compounds (VOC). The selection of the specific compounds to be measured shall depend on the objective sought and may be complemented by other compounds of interest. Member States may use the method which they consider suitable for the objective sought. The reference method as specified under Annex VI applies for nitrogen dioxide and oxides of nitrogen.

A list of VOC recommended for measurement is given below:

C. Siting

Measurements shall be taken at sampling points set up in accordance with the requirements of this Directive and considered appropriate with regards to the monitoring objectives referred to in Point A of this Section.

Section 4 – MeasurementS of ultrafine particles (UFP)

A. Objectives

The objective of such measurements is to ensure that adequate information is available at locations where high concentrations of UFP occur that are mainly influenced by sources from air, water or road transport (such as airports, ports or roads), industrial sites or domestic heating. The information shall be appropriate to judge on enhanced levels of UFP concentrations from those sources.

B. Substances

UFP.

C. Siting

Sampling points shall be established in accordance with Annexes IV and V at a location where high UFP concentrations are likely to occur and downwind of the main sources within the relevant predominant wind direction of those sources.

(1) Benzo(a)pyrene and the other polycyclic aromatic hydrocarbons referred to in Article 9(8).

(2) Where the siting of a monitoring supersite at an urban background location does not allow for the guidelines and criteria of EMEP to apply in accordance with Point C, point (f), of Annex IV, the corresponding deposition measurement may be performed at a separate urban background location within the area of representativeness.

(3) Benzo(a)pyrene and the other polycyclic aromatic hydrocarbons referred to in Article 9(8).