Division Emission levels associated with the best available techniques (BAT-AELs) for emissions to air

Unless otherwise stated, emission levels associated with the best available techniques (BAT-AELs) for emissions to air given in these BAT conclusions refer to concentrations, expressed as mass of emitted substances per volume of waste gas under the following standard conditions: dry gas at a temperature of 273,15 K and a pressure of 101,3 kPa, without correction for oxygen content, and expressed in mg/Nm³.

The equation for calculating the emission concentration at the reference oxygen level is:

where:

E_R

emission concentration at the reference oxygen level O_R;

O_R

reference oxygen level in vol-%;

E_M

measured emission concentration;

O_M

measured oxygen level in vol-%.

For averaging periods of BAT-AELs for emissions to air, the following definition applies.

When the waste gases of two or more sources (e.g. dryers or kilns) are discharged through a common stack, the BAT-AEL applies to the combined discharge from the stack.