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.
ExampleA component could be created for a steel embodied emission and the amortization rule Estimated Project Tonnage selected. The emission is calculated based on datapoints provided and automatically amortized to removals each verification based on the gross CO₂e removed within that reporting period, proportional to the expected gross CO₂e removed over the project lifetime.

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Add a project emission

To add a new project emission:
1

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.
2

Enter input values

Enter the input values for the emission calculation required by the component.
3

Upload sources

Upload files to evidence the datapoints provided.
4

Select an amortization rule

Click the ... menu and select Change amortization rule to select how the project emission will be amortized and amortized to removals.Supported options are:
  • Estimated project tonnage
  • Estimated project lifetime
  • Specified time period
  • Manual
New project emissions are only amortized to removals on unverified GHG statements. Verified GHG statements are immutable and cannot be further updated.

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Amortization rules

Amortization rules define how project emissions are amortized to submitted removals.
The following project attributes are used in amortization rule calculations:
  • Estimated gross removal tonnage
  • Project start date
  • Project end date
  • Specified amortization time period (in weeks) To update any of these attributes for your project, please contact the Isometric team.

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Estimated Project Tonnage

Selecting the Estimated project tonnage amortization 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: Amortization=GHGStatementGrossSequestrationProjectGrossTonnageEstimateAmortization = \frac{GHGStatementGrossSequestration}{ProjectGrossTonnageEstimate}
ExampleProject A has the expected lifetime output of 10,000 tCO₂e. The Supplier creates a GHG statement which has a total gross sequestration of 5,000 tCO₂e. 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 = 0.5This 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.

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Estimated Project Lifetime

Selecting the Estimated project lifetime amortization 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 amortization rule is not visible to you in Certify.
The function used to split an emission is as follows: Amortization=ReportingPeriodDurationProjectLifetimeDurationAmortization = \frac{ReportingPeriodDuration}{ProjectLifetimeDuration}
ExampleProject 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 = 0.25This 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.

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Specified Time Period

Selecting the Specified time period amortization rule means that the emission will be split across all GHG statements in the Project based on the proportion of the specified time period that each GHG statement covers. When you create a Project component, its emissions will automatically be split across any unverified GHG statements in that Project that exist within the specified time period. The time period is specified as a number of weeks. The function used to split an emission is as follows: Amortization=ReportingPeriodDurationCustomTimePeriodDurationAmortization = \frac{ReportingPeriodDuration}{CustomTimePeriodDuration}

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Manual

Selecting the Manual amortization rule allows you to select the fraction of the emission that is assigned to each of the GHG statements within a Project. Manual amortizations currently require use of the Certify API to implement, or contact your Implementation Engineer for support with creation.