Guantao Qingfeng Biological Manure Management Greenhouse Gas Emission Reduction Project

Audit Analysis

A VCS-registered anaerobic manure digestion project (AMS-III.F) in China with a verified first monitoring period, but the verification report identified four material findings including calculation errors in methane conversion factors, a weak additionality sensitivity profile, and an unexplained 42% free-fertilizer distribution. The project's integrity is materially undermined by these unresolved issues, and the leakage treatment lacks a coherent justification across documents.

Project Description

Red Flags

• ⚠Sensitivity analysis in the verification report showed the IRR benchmark is met with less than 10% change in revenue or costs, indicating marginal additionality that the VVB flagged as requiring further justification
• ⚠42% of the biogas-derived fertilizer is distributed free of charge, yet no evidence or rationale was provided to demonstrate this does not undermine the investment additionality test
• ⚠MCFj and Bo values used in the original emission-reduction calculations were incorrect; the verification report required correction to MCFj = 73% and Bo = 0.13, meaning previously reported ER figures may be unreliable
• ⚠Leakage deduction is 0% with the verification report stating the issue was 'not addressed' while the monitoring report claims it was 'deemed negligible' — no quantitative or qualitative justification is documented in either source
• ⚠The JVVR incorrectly referenced methodology AMS-III.D instead of the applicable AMS-III.F, raising questions about the rigor of the verification process

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