Xinxiang Yanmai Biogas Utilization Project

Audit Analysis

The Xinxiang Yanmai Biogas Utilization Project is a VCS-registered AMS-III.H biogas energy-substitution project in China with a 7-year crediting period. While the VVB confirmed additionality via an investment test and no reversal events are expected, the validation and monitoring reports identified seven material findings—including a lagoon depth discrepancy of 3.5 m versus 15 m, an initially incorrect additionality methodology, and a COD removal-efficiency calculation error—indicating substantial documentation quality issues that were subsequently corrected. The 0% leakage deduction is supported by contradictory justifications across documents, and several key monitoring parameters (FNRB, usage rate, buffer pool) are not stated in the available record.

Project Description

Red Flags

• ⚠Seven material findings in the validation report, including a lagoon depth discrepancy of 3.5 m vs 15 m and an initially incorrect additionality methodology (TOOL32 misapplied before revision to investment analysis)
• ⚠Leakage justification is contradictory: the monitoring report (Oct 2024) states 'quantified' while the validation report (Dec 2024) states 'deemed negligible', with a 0% deduction in both cases
• ⚠Total ERR claimed and verified are identical (349,678 tCO₂e), suggesting the monitoring report confirms the ex-ante estimate rather than reporting independent actuals for an elapsed period
• ⚠No buffer pool percentage is stated in any available document, and reversal events are marked 'not addressed' despite being described as not applicable

Credit Vintages

No issuances recorded on the registry.