Division Averaging periods and reference conditions 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, expressed as mass of emitted substance per volume of waste gas under the following standard conditions: dry gas, temperature of 273,15 K, pressure of 101,3 kPa.
| For continuous measurements | BAT-AELs refer to monthly average values, which are the averages of all valid hourly average values measured over a period of one month |
| For periodic measurements | BAT-AELs refer to the average value of three spot samples of at least 30 minutes each |
For combustion units, catalytic cracking processes, and waste gas sulphur recovery units, reference conditions for oxygen are shown in Table 1.
Table 1
Reference conditions for BAT-AELs concerning emissions to air
| In case of applying BAT 58. | ||
| Activities | Unit | Oxygen reference conditions |
|---|---|---|
| Combustion unit using liquid or gaseous fuels with the exception of gas turbines and engines | mg/Nm3 | 3 % oxygen by volume |
| Combustion unit using solid fuels | mg/Nm3 | 6 % oxygen by volume |
| Gas turbines (including combined cycle gas turbines — CCGT) and engines | mg/Nm3 | 15 % oxygen by volume |
| Catalytic cracking process (regenerator) | mg/Nm3 | 3 % oxygen by volume |
| Waste gas sulphur recovery unitf1 | mg/Nm3 | 3 % oxygen by volume |
Annotations
Footnotes
- f1
-
In case of applying BAT 58.