# Version history

<table data-full-width="true"><thead><tr><th width="399">Description of the change</th><th width="292">Justification</th><th width="157">Date</th><th>Version changed to</th></tr></thead><tbody><tr><td>Remove biogas torching parameter</td><td>Below impact threshold</td><td>May 2023</td><td>V1.1</td></tr><tr><td>Define gas self consumption rate of 4%</td><td>GHG results not sensitive, simplify data collection</td><td>May 2023</td><td>V1.1</td></tr><tr><td>Set digestate produced to 85% of the sum of feedstock input fresh mass</td><td>Precise values rarely available</td><td>May 2023</td><td>V1.1</td></tr><tr><td>Add possibility to have digestate separated during storage, and during spreading</td><td>Improved accuracy</td><td>June 2023</td><td>V1.1</td></tr><tr><td>Specify amounts and nutrient content of different phases of digestate (raw, liquid, solid)</td><td>Improved accuracy</td><td>June 2023</td><td>V1.1</td></tr><tr><td>Remove transport of manure and slurry in baseline and project scenario</td><td>Assumed to be the same in both scenarios, no effect in a comparative LCA</td><td>June 2023</td><td>V1.1</td></tr><tr><td>Add options for digestate transport via irrigation pipes or truck transport</td><td>Improved accuracy, more relevant options for Project Developers</td><td>June 2023</td><td>V1.1</td></tr><tr><td>Calculate digestate storage methane emission rate based on residence time in digester, rather than fixed rate of 2% of biogas produced</td><td>Improved accuracy</td><td>July 2023</td><td>V2.1</td></tr><tr><td>Updated parameter on amount of methane leaked during purification</td><td>Error in units conversion</td><td>September 2023</td><td>V2.2</td></tr><tr><td>Add possibility for projects to provide their own data on methane leakage rates during purification, instead of standard leakage rate of 0.7% of biogas leaked</td><td>Improved accuracy, increased use of project specific data</td><td>October 2023</td><td>V2.2</td></tr><tr><td>New section Monitoring Plan</td><td>Alignment with Standard Rules V6</td><td>March 2024</td><td>V2.3</td></tr><tr><td>Add share of biogas in the grid to the baseline scenario</td><td>Alignment with Rainbow Standard Rules V6 and increase conservativeness.</td><td>March 2024</td><td>V2.3</td></tr><tr><td>Added equations for calculation GHG reductions</td><td>Increased transparency.</td><td>May 2024</td><td>V3.0</td></tr><tr><td>Aligned terminology with ISO 14064-2:2019</td><td>Improved consistency with the voluntary carbon market. LCA principles still apply.</td><td>May 2024</td><td>V3.0</td></tr><tr><td>Added risk assessment template for environmental and social do no harm</td><td>Provide more detailed and prescriptive assessment framework, clearer instructions for project developers.</td><td>May 2024</td><td>V3.0</td></tr><tr><td><p>Removed text for sections that are the same for all methodologies:</p><ul><li>Measurability</li><li>Real</li><li>Additionality</li><li>Technology readiness level</li><li>Minimum impact</li><li>Independently verified</li></ul></td><td>Repeated text from the Standard Rules.</td><td>May 2024</td><td>V3.0</td></tr><tr><td>Added Monitoring Plan section</td><td>Alignment with Rainbow Standard Rules V6.</td><td>May 2024</td><td>V3.0</td></tr><tr><td>Remove Rebound Effect and Independently Validated criteria</td><td>Alignment with Rainbow Standard Rules V6.</td><td>May 2024</td><td>V3.0</td></tr><tr><td>Added uncertainty assessment section</td><td>Alignment with Rainbow Standard Rules V6.</td><td>May 2024</td><td>V3.0</td></tr><tr><td>Model infrastructure instead of full data collection, move under “Digestion and biomethane management” section</td><td>Simplification, results not sensitive to impacts</td><td>May 2024</td><td>V3.0</td></tr><tr><td>Model activated carbon based on energy production, instead of direct data collection</td><td>Simplification, results not sensitive to impacts</td><td>May 2024</td><td>V3.0</td></tr><tr><td>Change biomethane combustion methane emissions from fossil to biogenic</td><td>Error</td><td>May 2024</td><td>V3.0</td></tr><tr><td>Reintroduce transport of manure and slurry in baseline scenario</td><td>Completeness, often collected project transport distance anyway</td><td>May 2024</td><td>V3.0</td></tr><tr><td>Add five different energy cover crop options, instead of a single proxy</td><td>Improved accuracy, increased use of project specific data</td><td>May 2024</td><td>V3.0</td></tr><tr><td>New Leakage requirements</td><td>More rigorous eligibility criteria, and clear requirements and instructions for Project Developers (after public consultation)</td><td>July 2024</td><td>V3.0</td></tr><tr><td>Include methane emissions from manure and slurry storage in project and baseline scenarios</td><td>Public consultation feedback, erroneously assumed previously that they are the same in project and baseline scenarios</td><td>July 2024</td><td>V3.0</td></tr><tr><td>Create project scope requirements</td><td>Specify the project scope as one anaerobic digestion site</td><td>October 2024</td><td>V3.1</td></tr><tr><td>Add minimum list of ESDNH risks</td><td>Align with Standard Rules V6.2</td><td>October 2024</td><td>V3.1</td></tr><tr><td>Change GHG quantification from ecoinvent v3.10 to v3.11</td><td>Using more recent data</td><td>June 2025</td><td>V3.2</td></tr></tbody></table>


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