AWMS Methane Recovery Project MX06-S-62, Coahuila, México

Audit Analysis

A small-scale CDM methane avoidance project (AMS III.D) validated by TÜV SÜD in 2008, with a combined additionality test confirmed by the VVB. However, the project record is severely limited to the PDD and validation report, with no monitoring or verification reports available for the full 10-year crediting period. A 10-fold discrepancy in the claimed ERR between the PDD and the validation report, combined with a project-specific modeled baseline, zero leakage deduction without quantification, and no permanence mechanism, raises significant concerns about the robustness and verifiability of the credit claims.

Project Description

Red Flags

• ⚠10-fold discrepancy in total ERR: the PDD (2008-01-15) states 70,212 tCO₂e while the validation report (2008-01-16) states 7,021 tCO₂e — a factor-of-ten difference that undermines confidence in the credit quantity
• ⚠No monitoring reports or verification reports are available for the entire 10-year crediting period (2008–2018), making it impossible to confirm actual emissions reductions
• ⚠No buffer pool or permanence mechanism is documented for a methane avoidance project where reversion to open-lagoon emissions is a realistic risk if the digester ceases operation
• ⚠Leakage deduction of 0% is justified only as 'deemed negligible' with no quantified analysis or sensitivity assessment
• ⚠Three material findings at validation (farm removal, loss of inventory data, incomplete flush infrastructure) and four corrective actions indicate the project design was not fully mature at the time of validation

Credit Vintages

No issuances recorded on the registry.