15.9.2023
EN
Official Journal of the European Union
L 228/145
accordance with point 2 may be used.
Where such methods are not available, not technically feasible, or would incur unreasonable costs, default values made available and published by the Commission for the transitional period may be used under the conditions specified in Article 4(3) of this Regulation.
(b) For direct or indirect determination methods, a method is deemed suitable where it is ensured that any metering, analyses, sampling, calibrations, and validations for the determination of the specific data set are carried out by applying methods defined in relevant EN or ISO standards.
Where such standards are not available, national standards may be used.
Where no applicable published standards exist, suitable draft standards, industry best practice guidelines or other scientifically proven methodologies shall be used, limiting sampling and measurement bias.
(c) Within one method mentioned in point (a), measuring instruments or laboratory analyses under the operator’s control shall be preferred over measuring instruments or analyses under the control of another legal entity, such as the supplier of fuel or materials or trade partners regarding goods produced.
(d) Measuring instruments shall be selected such that they exhibit the lowest uncertainty in use without incurring unreasonable costs.
Instruments under legal metrological control are preferred, except where other instruments with significantly lower uncertainty in use are available.
Instruments shall be used only in environments appropriate according to their use specification.
(e) Where laboratory analyses are used, or where laboratories carry out sample treatment, calibrations, method validations, or activities relating to continuous emissions measurements, the requirements of Section B.5.4.3 of this Annex shall apply.
2.
Indirect determination methods: Where no direct determination method is available for a required data set, in particular for cases where net measurable heat going into different production processes needs to be determined, an indirect determination method may be used, such as: (a) calculation based on a known chemical or physical process, using appropriate accepted literature values for the chemical and physical properties of substances involved, appropriate stoichiometric factors and thermodynamic properties such as reaction enthalpies, as appropriate; (b) calculation based on the installation’s design data such as the energy efficiencies of technical units or calculated energy consumption per unit of product; (c) correlations based on empirical tests for determining estimation values for the required data set from noncalibrated equipment or data documented in production protocols.
For that purpose it shall be ensured that the correlation satisfies the requirements of good engineering practice and that it is applied only to determine values which fall into the range for which it was established.
The validity of such correlations shall be evaluated at least once a year.
3.
To determine the best available data sources, the data source highest in the ranking presented under point 1 and already available at the installation shall be selected.
However, where it is technically feasible to apply a data source higher in the ranking without incurring unreasononable costs, such better data source shall be applied without undue dalay.
Where different data sources are available for the same data set at the same level in the ranking presented under point 1, the data source which ensures the clearest data flow with lowest inherent risk and control risk regarding misstatements shall be chosen.
4.
The data sources chosen under point 3 shall be used for the determination and reporting of embedded emissions.
5.
To the extent feasible without incurring unreasonable costs, for the purpose of the control system in accordance with Section H of this Annex, additional data sources or methods for determining data sets shall be identified to allow corroboration of data sources under point 3.
The selected data sources, if any, shall be laid down in the monitoring methodology documentation.