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)
| 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 % |