ANNEX IV U.K. Activity-specific monitoring methodologies related to installations (Article 20(2))

23. Geological storage of CO₂ in a storage site permitted under Directive 2009/31/EC U.K.

B. Quantification of CO₂ emissions U.K.

B.1. Vented and fugitive emissions from injection U.K.

The operator shall determine emissions from venting and fugitive emissions as follows:

CO₂ emitted [t CO₂] = V CO₂ [t CO₂] + F CO₂ [t CO₂]

Where:

V CO₂

=

amount of CO₂ vented;

F CO₂

=

amount of CO₂ from fugitive emissions.

Each operator shall determine V CO₂ using measurement-based methodologies in accordance with Articles 41 to 46 of this Regulation. By way of derogation from the first sentence and upon approval by the competent authority, the operator may include in the monitoring plan an appropriate methodology for determining V CO₂ based on industry best practice, where the application of measurement-based methodologies would incur unreasonable costs.

The operator shall consider F CO₂ as one source, meaning that the uncertainty requirements associated with the tiers in accordance with section 1 of Annex VIII are applied to the total value instead of the individual emission points. Each operator shall provide in the monitoring plan an analysis regarding potential sources of fugitive emissions, and provide a suitable documented methodology to calculate or measure the amount of F CO₂, based on industry best practice guidelines. For the determination of F CO₂ the operator may use data collected in accordance with Article 32 to 35 and Annex II(1.1)(e) to (h) of Directive 2009/31/EC for the injection facility, where they comply with the requirements of this Regulation.