Division Emission levels associated with the best available techniques (BAT-AELs) for emissions to air
United Kingdom
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 flue-gas or of extracted air under the following standard conditions: dry gas at a temperature of 273,15 K and a pressure of 101,3 kPa, and expressed in mg/Nm3, µg/Nm3, ng I-TEQ/Nm3 or ng WHO-TEQ/Nm3.
The reference oxygen levels used to express BAT-AELs in this document are shown in the table below.
| Activity | Reference oxygen level (OR) |
|---|---|
| Incineration of waste | 11 dry vol-% |
| Bottom ash treatment | No correction for the oxygen level |
The equation for calculating the emission concentration at the reference oxygen level is:
Where:
emission concentration at the reference oxygen level OR;
reference oxygen level in vol-%;
measured emission concentration;
measured oxygen level in vol-%.
For averaging periods, the following definitions apply:
| For any parameter where, due to sampling or analytical limitations, 30-minute sampling/measurement and/or an average of three consecutive measurements is inappropriate, a more suitable procedure may be employed. For PCDD/F and dioxin-like PCBs, one sampling period of 6 to 8 hours is used in the case of short-term sampling. | ||
| Type of measurement | Averaging period | Definition |
|---|---|---|
| Continuous | Half-hourly average | Average value over a period of 30 minutes |
| Daily average | Average over a period of one day based on valid half-hourly averages | |
| Periodic | Average over the sampling period | Average value of three consecutive measurements of at least 30 minutes eachf1 |
| Long-term sampling period | Value over a sampling period of 2 to 4 weeks | |
When waste is co-incinerated together with non-waste fuels, the BAT-AELs for emissions to air given in these BAT conclusions apply to the entire flue-gas volume generated.
Annotations
Footnotes
- f1
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For any parameter where, due to sampling or analytical limitations, 30-minute sampling/measurement and/or an average of three consecutive measurements is inappropriate, a more suitable procedure may be employed. For PCDD/F and dioxin-like PCBs, one sampling period of 6 to 8 hours is used in the case of short-term sampling.