Division 1 TIER DEFINITIONS FOR MEASUREMENT-BASED METHODOLOGIES
United Kingdom
Measurement-based methodologies shall be approved in accordance with tiers with the following maximum permissible uncertainties for the annual average hourly emissions calculated in accordance with Equation 2 set out in section 3 of this Annex.
Table 1
Tiers for CEMS (maximum permissible uncertainty for each tier)
| In case of CO2, the uncertainty is to be applied to the total amount of CO2 measured. Where the biomass fraction is determined using a measurement based methodology, the same tier definition as for CO2 shall be applied to the biomass fraction. | ||||
| Tier 1 | Tier 2 | Tier 3 | Tier 4 | |
|---|---|---|---|---|
| CO2 emission sources | ± 10 % | ± 7,5 % | ± 5 % | ± 2,5 % |
| N2O emission sources | ± 10 % | ± 7,5 % | ± 5 % | N.A. |
| CO2 transfer | ± 10 % | ± 7,5 % | ± 5 % | ± 2,5 % |