Section 4.4.5.
Winter smog periods


Article 4.4.5.1. Scope

The provisions of the present Section apply to establishments classified in the first category, of which the total emissions discharged exceed the following emission values for one or more parameters:

Parameter

emission value in kg/hour

Nitrogen oxides (expressed in NO2)

40

Sulphur dioxide

60

Suspended particulates (dust)

15

Chlorine and its gaseous inorganic compounds, expressed as Cl

20

Fluorine and its gaseous inorganic compounds, expressed as F

1

Carbon monoxide

1,000

The aforementioned term "emission value" must be understood here as the average value per operational hour of the emissions during one calendar week in the most unfavourable operating conditions as regards air pollution.


Article 4.4.5.2. Measures during smog conditions

During periods of temporarily increased air pollution as a result of adverse meteorological conditions, operators of the establishments referred to in Article 4.4.5.1. must take all measures possible to limit emissions of polluting substances as much as possible. These measures will in particular relate to:

1)

the temporary reduction of production and combustion processes that give rise to the said emissions;

2)

the temporary change-over to fuel with a lower sulphur content and if possible even the use of natural gas as fuel;

3)

the temporary suspension of air-polluting activities that can be postponed;

4)

postponing the start-up of certain processes if this would involve an extra emission.


Article 4.4.5.3. Warning phase

1.

The operator referred to in Article 4.4.5.2. must keep ready to take the measures referred to in Article 4.4.5.2. as soon as:

1)

either the measured moving 24-hour average (over a period of 24 consecutive hours) for sulphur dioxide in the ambient air exceeds 190 g/m;

2)

or the measured moving hourly average for nitrogen dioxide in the ambient air exceeds 150 g/m for three consecutive hours.

2.

The warning phase referred to in 1 comes to an end as soon as the measured moving 24-hour average immission value for sulphur dioxide is less than or equal to 190 g/m, or if the measured moving hourly average immission value for nitrogen dioxide over a period of 24 consecutive hours is less than or equal to 150 g/m.


Article 4.4.5.4. Alert phase

1.

The operator referred to in Article 4.4.5.2. must take the measures referred to in Article 4.4.5.2. each time when:

1)

either the measured moving 24-hour average (over a period of 24 consecutive hours) for sulphur dioxide in the ambient air exceeds 250 g/m;

2)

or the measured moving hourly average for nitrogen dioxide in the ambient air exceeds 200 g/m.

2.

The measures referred to in 1 come to an end as soon as the measured moving 24-hour average immission value for sulphur dioxide over a period of 24 consecutive hours is less than or equal to 190 g/m or if the measured moving hourly average immission value for nitrogen dioxide over a period of 24 consecutive hours is less than or equal to 150 g/m, respectively.


Article 4.4.5.5. The Division competent for environmental enforcement shall inform the operators involved when the warning phase or the alert phase take effect and also when they end. Simultaneously, this information is also communicated to the other regions, to neighbouring countries and to the press.