Methane Recovery Project Aben, Wanroij, North Brabant, The Netherlands

Audit Analysis

This Dutch methane recovery project has VVB-confirmed additionality and a conservativity factor applied, but suffers from significant data-quality issues including uncalibrated instruments, missing flow meters, and a large gap between claimed and verified emission reductions. The project-specific modeled baseline, thin leakage justification, and numerous material findings and corrective actions undermine confidence in the integrity and accuracy of the credit claims.

Project Description

Red Flags

• ⚠Verified ERR (6,266 tCO₂e) is only ~35% of the claimed ERR (17,873 tCO₂e) for the 2022 monitoring period, indicating a major over-claiming issue that the VVB had to correct
• ⚠Five material findings in the verification report, including biogas production estimated from electricity rather than measured (no flow meter), methane content from literature values due to uncalibrated gas analyzer, and incorrect manure quantities
• ⚠Seven corrective actions required, including incorrect digestate values, mismatched pig manure records, missing biomass residue monitoring required by AMS I.C v21, and missing calibration details for monitoring equipment
• ⚠Eleven contradictions across documents, including a 10-year discrepancy in the crediting period start date (2006 vs 2016) and conflicting additionality test types (barrier vs regulatory)
• ⚠Buffer pool percentage not stated in any available document, leaving permanence risk unquantified

Credit Vintages