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.