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What is “quantity of loss” in A1?
The A1 loss refers to materials lost only during the extraction phase, such as overburden. In other words, it includes all materials—excluding excavated material—that are not transported to the processing plant. If you have no losses at this stage, you can enter "0".
This data is not used in the calculation, but it helps to correctly assess the quantities that will actually be processed. The key point is that the “quantity of materials to be processed" must correspond to the material effectively transported to your plant.
⚠️ Do not include here any losses occurring later in the production process, such as washing fines, sludge, etc.
What should I do if the same machines are used for both extraction (A1) and transport (A2)? How can I allocate their energy consumption?
If the same machines are used for both material extraction and transport to your processing site, try to estimate as accurately as possible how energy consumption is distributed between these two stages.
In the calculator, you have the option to check the box "Extraction machines directly supply the processing plant." Only select this if there is truly no transport, as this will result in a transport impact of "0" on your certificate.
If transport is involved but separating fuel consumption between extraction and transport is difficult, try to estimate their respective shares as best as possible.
🔹 The key point is to ensure all energy consumption is accounted for while avoiding double counting. You can check the calculator for a list of operations to ensure nothing is overlooked.
A2 refers to the transport of extracted materials to the processing plant. Can a field be added for the transport of overburden to the storage or disposal area?
This field is not needed, as the removal and management of overburden are part of Stage A1 (extraction). Therefore, the transport of overburden to a storage or disposal area also falls under A1. The associated fuel consumption should be reported under A1.
Stage A2 only covers the transport of materials that will be processed into aggregates. This is why these two types of transport belong to different stages.
What should I do if the energy source I use is not listed?
If your energy source is not listed, you can select "Other". A field will then appear where you can specify your energy source.
To help us model it accurately, feel free to send us additional information, such as:
📄 Description and technical specifications
🌱 Associated carbon footprint
🏭 Supplier name for further inquiries
👉 This also applies to any other dropdown menus where you cannot find the desired option.
What should I do if I can’t find my consumable in the list?
If your consumable is not listed, try to see if it can fit into an existing category. The key factor is the material it is made of, not its shape or function. For example:
🛠️ A metal part used in a crusher, conveyor, or another machine is still metal → Select "Metal spare parts".
If your consumable is made of multiple materials, you can create two separate entries. For example, for a 500 kg part composed of 70% metal and 30% plastic:
🔹 350 kg of metal
🔹 150 kg of plastic
This will generate two separate entries in the calculator.
If you have already declared a quantity of metal with the same characteristics (packaging, transport), you can add them together. For example, if you initially declared 2 t of metal and need to add 350 kg, you should enter 2.350 t (quantities must be recorded in tonnes).
👉 If no option fits your case, select "Other" and send us additional details (via email or calculator comments) so we can integrate it properly.
Should subcontractors responsible for land rehabilitation also report their energy consumption?
Yes, even if you work with subcontractors, you must also consider the energy consumption of the activities they perform, including land rehabilitation. These consumptions are essential for calculating the total carbon footprint of your aggregates. It is important to include the data from subcontractors to ensure a complete and accurate result.
🔹 We understand that collecting this data for life cycle analysis (LCA) can be challenging, but it is a crucial step to ensure reliable and consistent results in carbon footprint calculation.
🔹 If no data is available, try to estimate the consumption.
🔹 If estimation is not possible, it is recommended to put measures in place to collect this information next year.
I don't have any external materials, but the corresponding section is mandatory. What should I do?
The section on external materials only appears if you answered "yes" to the question "Do you process materials from other sites?" on the first page, under the General Information heading.
If you don't use any external materials, simply go back to that question and answer "no." The corresponding section will then disappear from the form.