Subsection 2.5.2.2.
Assessment of the air quality


Article 2.5.2.2.1.

§ 1.

The upper and lower assessment thresholds stated in Appendix 2.5.3.2, Part A apply to sulphur dioxide, nitrogen dioxide and nitrogen oxides, particulate matter (PM10 and PM2.5), lead, benzene and carbon monoxide.

 

Each zone and agglomeration is subdivided on the basis of the assessment thresholds.

 

§ 2.

The classification stated in paragraph 1 shall be reviewed at least every five years according to the procedure stated in Appendix 2.5.3.2, Part B.

 

The subdivision shall be reviewed more frequently if there are significant changes in the activities that are relevant for the concentrations of sulphur dioxide, nitrogen dioxide or, if applicable, nitrogen oxides, particulate matter (PM10 and PM2.5), lead, benzene or carbon monoxide.


Article 2.5.2.2.2.

§ 1.

The Flanders Environment Agency shall assess the air quality in all zones and agglomerations for the polluting substances stated in Article 2.5.2.2.1, in accordance with the criteria stated in paragraphs 2, 3 and 4, and in accordance with the criteria listed in Appendix 2.5.3.3.

 

§ 2.

In all zones and agglomerations where the level of the polluting substances stated in paragraph 1 exceeds the established upper threshold limit for those polluting substances, fixed measurements shall be used to assess the air quality. These fixed measurements may be supplemented with modelling techniques or indicative measurements to obtain adequate information on the spatial distribution of the air quality.

 

§ 3.

In all zones and agglomerations where the level of the polluting substances stated in paragraph 1 is lower than the established upper threshold limit for those polluting substances, a combination of fixed measurements and modelling techniques or indicative measurements may be used to assess the air quality.

 

§ 4.

In all zones and agglomerations where the level of the polluting substances stated in paragraph 1 is lower than the established lower threshold limit for those polluting substances, modelling techniques or objective estimation techniques or both shall suffice to assess the air quality.

 

§ 5.

Besides the assessments stated in paragraphs 2, 3 and 4, measurements shall be carried out at background locations in rural areas, located a certain distance from major sources of air pollution. These measurements shall at least provide information on the total mass concentration and the concentrations of the chemical compounds of fine particulate matter (PM2.5) in terms of the annual average, and shall be carried out in accordance with the following criteria:

a sampling point shall be established for every 100,000 kmē;

2° 

at least one measuring station or, by mutual agreement with the neighbouring countries, one or more joint measuring stations shall be established that cover the relevant neighbouring zones, to guarantee the required spatial resolution;

if applicable, the monitoring shall be coordinated with the monitoring strategy and the measuring cooperative programme for monitoring and evaluation of the long-range transmissions of air pollutants in Europe (EMEP);

Parts A and C of Appendix 2.5.3.1 apply to the data quality targets for measurements of mass concentrations of particulate matter, and Appendix 2.5.3.4 applies in its entirety.

 

The Flanders Environment Agency shall inform the European Commission through the appropriate channels of the measuring methods used to measure the chemical composition of fine particulate matter (PM2.5). 


Article 2.5.2.2.3.

§ 1.

The location of the sampling points for measuring sulphur dioxide, nitrogen dioxide and nitrogen oxides, particulate matter (PM10 and PM2.5), lead, benzene and carbon monoxide in the air is determined in accordance with the criteria stated in Appendix 2.5.3.3.

 

§ 2.

In each zone or agglomeration where fixed measurements are the only source of data for assessing the air quality, the number of sampling points for each polluting substance in question may not be less than the minimum number of sampling points stated in Appendix 2.5.3.5, Part A.

 

§ 3.

In zones and agglomerations where the data from sampling points for fixed measurements are supplemented by data obtained from modelling or indicative measurements, the total number of sampling points stated in Appendix 2.5.3.5, Part A may be reduced by up to 50% if the following conditions have been met:

the supplementary methods provide sufficient data to assess the air quality in relation to limit values or alarm thresholds, as well as adequate data for the public;
the number of sampling points to be established and the spatial resolution of the other techniques are sufficient to determine the concentration of the polluting substance in question in accordance with the data quality targets stated in Appendix 2.5.3.1, Part A, and allow assessment results that meet the criteria stated in Appendix 2.5.3.1, Part B.  

 

The results of modelling or indicative measurements are taken into account when assessing the air quality for limit values.


Article 2.5.2.2.4. The reference measuring methods and criteria stated in Appendix 2.5.3.6, Parts A and C shall be applied. Other measuring methods may be used under the conditions stated in Appendix 2.5.3.6, Part B.

Article 2.5.2.2.5.

If, in a zone or agglomeration, the ozone concentrations have exceeded the long-term objectives stated in Appendix 2.5.3.7, Part C during one of the last five years of measurement, fixed measurements shall be carried out.

 

If no data are available for the last five years, or if only partial data are available, the VMM may, to answer the question of whether the long-term objectives stated in paragraph 1 were exceeded during these five years, combine the results of measurement campaigns of short duration carried out at times and locations where the levels were likely to be the highest with the data from emission inventories and modelling.


Article 2.5.2.2.6.

§ 1.

The location of the sampling points for ozone measurements shall be determined in accordance with the criteria stated in Appendix 2.5.3.8.

 

§ 2.

In zones or agglomerations where measurements are the only source of data for assessing the air quality, the number of sampling points for fixed measurements of ozone may not be less than the minimum number of sampling points stated in Appendix 2.5.3.9, Part A.

 

§ 3.

In zones and agglomerations where the data from sampling points for fixed measurements are supplemented by data obtained from modelling or indicative measurements, the total number of sampling points stated in Appendix 2.5.3.9, Part A may, however, be reduced if the following conditions have been met:

the additional methods provide sufficient data to assess the air quality in relation to target values, long-term objectives and information and alarm thresholds;

the number of sampling points to be established and the spatial resolution of the other techniques are sufficient to determine the ozone concentration in accordance with the data quality targets stated in Appendix 2.5.3.1, Part A, and allow assessment results that meet the criteria stated in Appendix 2.5.3.1, Part B.

in each zone or agglomeration there shall be at least one sampling point for every two million inhabitants, or at least one sampling point per 50,000 kmē if that criterion gives a greater number of sampling points. In each zone or agglomeration, there shall be at least one sampling point;

nitrogen dioxide shall be measured at all remaining sampling points, except the measuring stations for determining rural background values stated in Appendix 2.5.3.8, Part A.

 

The results of modelling or indicative measurements are taken into account when assessing the air quality in relation to target values.

 

§ 4.

Nitrogen dioxide shall be measured at a minimum of 50% of the sampling points required for ozone in accordance with Appendix 2.5.3.9, Part A. Nitrogen dioxide shall be measured continuously, except in the measuring stations for determining rural background values stated in Appendix 2.5.3.8, Part A, where other measuring methods may be used.

 

§ 5.

In zones and agglomerations where the concentrations in each of the last five years of measurements lie below the long-term objectives, the number of sampling points for fixed measurements is determined in accordance with Appendix 2.5.3.9, Part B.

 

§ 6.

At least one sampling point shall be established and used to obtain data on the concentrations of the ozone precursors stated in Appendix 2.5.3.10. The number and location of the stations where the ozone precursors are measured shall be determined taking into account the objectives and methods stated in Appendix 2.5.3.10.


Article 2.5.2.2.7.

The reference method for measuring ozone stated in Appendix 2.5.3.6, Part A, point 8 shall be applied. Other measuring methods may be used under the conditions stated in Appendix 2.5.3.6, Part B.

 

The Flanders Environment Agency shall notify the European Commission, through the appropriate channels, of the methods used for the sampling and measuring of volatile organic compounds stated in Appendix 2.5.3.10.