Project emissions
While most emissions relate to a project’s operational phase, project proponents must also account for emissions arising from the Project establishment and end-of-life phases.
Example
A component could be created for a steel embodied emission and the allocation rule Estimated Project Tonnage selected. The emission is calculated based on datapoints provided and automatically allocated to removals each verification based on the net CO₂e removed within that reporting period, proportional to the expected net CO₂e removed over the project lifetime.
Add a project emission
To add a new project emission:
Add a project emission
Project emissions should be added by adding components to the Project establishment & End of life section of the LCA builder.
Relevant components may be those outlined in the Embodied Emissions Accounting module.
Enter input values
Enter the input values for the emission calculation required by the component.
Upload sources
Upload files to evidence the datapoints provided.
Select an allocation rule
Click the ... menu and select Change allocation rule to select how the project emission will be amortized and allocated to removals.
Supported options are:
- Estimated project tonnage
- Estimated project lifetime
- Custom time period
- Manual
New project emissions are only allocated to removals on unverified GHG statements. Verified GHG statements are immutable and cannot be further updated.
Allocation rules
Allocation rules define how project emissions are allocated to submitted removals.
Estimated Project Tonnage
Selecting the Estimated project tonnage allocation rule means that the emission will be split across all GHG statements in the Project based on the proportion of the gross sequestration that each GHG statement represents. When you create a Project component, its emissions will automatically be split across any unverified GHG statements in that Project.
The calculation used to split an emission is as follows:
Example
Project A has the expected lifetime output of 10,000 tCO₂e. The Supplier creates a GHG statement which has a total size of 5,000 tCO₂e before any Project-level emissions are applied to it. The Project emission being amortized is 1,000 tCO₂e.
Our system would then automatically compute the following proportion of the Project emission to be applied to the GHG statement:
5000 tCO₂e / 10000 tCO₂e = 0.5
This means that (1,000 tCO₂e * 0.5 = 500 tCO₂e) of the Project emission would be applied to the created GHG statement. Each Removal within the GHG statement would receive an even split of this portion of the emission, as documented in the section above.
Estimated Project Lifetime
Selecting the Estimated project lifetime allocation rule means that the emission will be split across all GHG statements in the Project based on the proportion of the total project lifetime that each GHG statement represents. This rule uses the project start and project end dates Project lifetime. When you create a Project emission, it will automatically be split across any unverified GHG statements in that Project.
Project start and end dates must be configured manually by Isometric’s product team. Contact us if this allocation rule is not visible to you in Certify.
The function used to split an emission is as follows:
Example
Project B has an expected lifetime of 2 years. The Supplier creates a GHG statement which has a total duration of 6 months which has a total size of 5,000 tCO₂e before any Project-level emissions are applied to it. The Project emission being amortized is 1,000 tCO₂e.
Our system would then automatically compute the following proportion of the Project emission to be applied to the GHG statement:
0.5 years / 2 years = 0.25
This means that (1000 tCO₂e * 0.25 = 250 tCO₂e) of the Project emission would be applied to the created GHG statement. Each Removal within the GHG statement would receive an even split of this portion of the emission, as documented in the section above.
Custom Time Period
Selecting the Custom time period allocation rule means that the emission will be split across all GHG statements in the Project based on the proportion of the custom time period that each GHG statement represents. This rule uses the custom_amortization_time_period_weeks field associated with the project. When you create a Project component, its emissions will automatically be split across any unverified GHG statements in that Project that exist within the custom time period.
The function used to split an emission is as follows:
Manual
Selecting the Manual allocation rule will allow you to select the fraction of the emission that is assigned to each of the GHG statements within the Project.
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