Division Emission levels associated with the best available techniques (BAT-AELs) for emissions to air
United Kingdom
Unless stated otherwise, emission levels associated with the best available techniques (BAT-AELs) for emissions to air given in these BAT conclusions refer to concentrations (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 μg/Nm3 or mg/Nm3.
For averaging periods of BAT-AELs for emissions to air, the following definitions apply.
| For any parameter where, due to sampling or analytical limitations, a 30-minute measurement is inappropriate, a more suitable measurement period may be employed (e.g. for the odour concentration). For PCDD/F or dioxin-like PCBs, one sampling period of 6 to 8 hours is used. | ||
| Type of measurement | Averaging period | Definition |
|---|---|---|
| Continuous | Daily average | Average over a period of one day based on valid hourly or half-hourly averages. |
| Periodic | Average over the sampling period | Average value of three consecutive measurements of at least 30 minutes eachf1. |
Where continuous measurement is used, the BAT-AELs may be expressed as daily averages.
Annotations
Footnotes
- f1
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For any parameter where, due to sampling or analytical limitations, a 30-minute measurement is inappropriate, a more suitable measurement period may be employed (e.g. for the odour concentration). For PCDD/F or dioxin-like PCBs, one sampling period of 6 to 8 hours is used.