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CDMMethane avoidanceChinaAMS-III.D

Hebei Wuan Lancun Biogas Digester Project

CDM-4228 ↗

#203of 268 in Biogas#967of 1084 in China#1309of 1459 in CDM (UNFCCC)#81of 105 in AMS-III.D

4.2/ 10
Integrity
5.0
Transparency
3.5
Claim Safety
4.2
Documentation
3.8

Audit Analysis

A CDM biogas digester project in China validated in 2011 with a VVB-confirmed investment additionality test, but the record is heavily weighted toward a single validation report containing 23 material findings and four cross-document contradictions. No monitoring or verification data is available to confirm actual emission reductions, and the project-specific modeled baseline with a thin leakage justification limits confidence in the claimed 13,212 tCO₂e over the 10-year crediting period.

Red Flags

  • Ten-fold discrepancy in claimed ERR: the PDD states 132,120 tCO₂e while the validation report states 13,212 tCO₂e — a factor-of-ten error that undermines confidence in the project's quantification
  • 23 material findings in the validation report covering calculation transparency, missing data sources, and monitoring plan gaps, indicating a substantially underdeveloped PDD at the time of validation
  • No monitoring reports, verification reports, or verified ERR figures are present in the extracted record, making it impossible to confirm whether the project delivered its claimed reductions
  • Grid emission factor differs between the PDD (0.89355) and the validation report (0.7802), and the PDD did not initially address leakage at all

Credit Vintages

No issuances recorded on the registry.

Risk Indicators

Additionality

VVB-confirmed investment test

Permanence

low inherent reversal risk (methane avoidanc

Leakage

0% deduction, 'deemed negligible'; PDD initially silent

Baseline

Project-specific, modeled; no reassessment record

Safeguards

Safeguards mentioned, benefit sharing described; no FPIC or

Double-claim

CORSIA and CCP status not stated in available documents

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Analysis ProvenanceScored2026-08-31AMS-III.D and AMS-I.C

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