‘Source stream’ under the M&R Regulation means any of the following:
- a specific fuel type, raw material or product giving rise to emissions of relevant greenhouse gases at one or more emission sources as a result of its consumption or production;
- a specific fuel type, raw material or product containing carbon and included in the calculation of greenhouse gas emissions using a mass balance methodology.
The Guidance Document No. 1 explains that the term ‘source stream’ under the M&R Regulation refers to all the inputs and outputs which have to be monitored when using a calculation based approach . The wording is the result of the attempt to quickly express “fuel or material entering or leaving the installation, with a direct impact on emissions”. In the simplest case it means the fuels “streaming” into the installation and forming a “source” of emissions. The same is true for raw materials which give rise to process emissions. In some cases, process emissions are calculated based on a product, such as burnt lime. In this case this product is the source stream.
Furthermore the term includes also mass streams going into and coming from the system boundaries of mass balances. This is justified by the fact that mass streams entering and leaving the installation are treated in principle by applying the same requirements as for other source stream.
The operator must classify each source stream, comparing the source stream against the sum of all absolute values of fossil CO2 and CO2(e) corresponding to all source streams included in calculation-based methodologies and of all emissions of emission sources monitored using measurement-based methodologies, before subtraction of transferred CO2, in one of the following categories:
(a) minor source streams, where the source streams selected by the operator jointly correspond to less than 5 000 tonnes of fossil CO2 per year or to less than 10 %, up to a total maximum contribution of 100 000 tonnes of fossil CO2 per year, whichever is the highest in terms of absolute value;
(b) de-minimis source streams, where the source streams selected by the operator jointly correspond to less than 1 000 tonnes of fossil CO2 per year or to less than 2 %, up to a total maximum contribution of 20 000 tonnes of fossil CO2 per year, whichever is the highest in terms of absolute value;
(c) major source streams, where the source streams do not classify in any category referred to in points (a) and (b).