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VCSLivestock, enteric fermentation, and manure management; Waste handling and disposalChina Registry: RegisteredAMS-III.F

Yongtai Danyun Duck Farm Manure Composting Project

VCS-4198 ↗

#948of 1329 in Industrial#902of 1084 in China#1032of 1339 in Verra (VCS)#35of 43 in AMS-III.F

4.5/ 10
Integrity
4.8
Transparency
4.5
Claim Safety
4.5
Documentation
4.0

Audit Analysis

A registered VCS duck-farm manure composting project in China with a VVB-confirmed investment additionality test, but significant documentation gaps at validation (10 material findings, 10 corrective actions), a project-specific modeled baseline with missing lagoon specifications, and a leakage treatment that is internally contradictory across documents. No monitoring-period data or verified ERR is available yet, so the 248,430-tonne lifetime claim remains untested against actual performance.

Red Flags

  • Ten material findings at validation include missing baseline lagoon specifications, incorrect methodology version references, investment-analysis spreadsheet errors, and an ERR spreadsheet cell mislabelled (PECH4,y instead of PEN2O,y), all of which undermine confidence in the 248,430-tonne ERR figure until corrected and re-verified.
  • Leakage justification is contradictory: the validation report (2024-02-04) states leakage is 'deemed negligible' with a 0% deduction, while an undated appendix describes it as 'quantified'—the two treatments are mutually inconsistent and the 0% deduction lacks a robust, documented justification for a composting project where end-use diversion is plausible.
  • No buffer-pool percentage is stated in any available document, and the permanence claim (years) is not specified, leaving the project's reversal-risk mitigation framework undocumented despite the 'not applicable' reversal statement.
  • FPIC status is not stated in any extracted document, creating a safeguards gap for a project operating on a private duck farm in China.

Credit Vintages

No issuances recorded on the registry.

Risk Indicators

Additionality

VVB-confirmed investment test

Permanence

mixed evidence / unresolved risk

Leakage

0% deduction, contradictory justification

Baseline

Project-specific, modelled, lagoon specs missing

Safeguards

Grievance mechanism present, FPIC not stated

Double-claim

CORSIA and CCP status not stated

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Analysis ProvenanceScored2026-09-04AMS-III.F

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