WEIYUAN COMPOSTING PROJECT

Audit Analysis

The Weiyuan Composting Project is a VCS-registered manure composting project in China with a VVB-confirmed combined additionality test and verified ERR of 130,822 tCO₂e for the 2022–2024 monitoring period. However, the project-specific baseline, a 0% leakage deduction justified only as 'deemed negligible,' the absence of a stated buffer pool, and multiple corrective action requests (four CARs, eleven corrective actions) indicate moderate data reliability concerns. Several contradictions between the PDD, validation report, monitoring report, and verification report—particularly on the grid emission factor and whether the baseline is measured or modeled—warrant caution before relying on the verified figures.

Project Description

Red Flags

• ⚠Grid emission factor contradiction: the monitoring report (2025-04-29) uses 0.3297 tCO₂/MWh while the verification report (same date) lists 0.5959 tCO₂/MWh; the two values differ by 81% and directly affect baseline emissions
• ⚠Non-permanence risk analysis is marked N/A in the verification report and no buffer pool percentage is stated in any available document, leaving reversal risk unquantified
• ⚠Four Corrective Action Requests were raised by the VVB (CTI), including an incorrect MCFj value in the baseline calculation and an unjustified new parameter (ρfuel), indicating the project documentation contained material errors at the time of verification
• ⚠Leakage deduction is 0% with a justification of 'deemed negligible,' yet the monitoring report characterises the same treatment as 'quantified'—the inconsistency weakens confidence in the leakage assessment for a composting project where unapplied compost could still emit methane
• ⚠FPIC status is contradictory: the verification report (2025-04-29) confirms FPIC was conducted, while the PDD (2024-05-16) states it was not; the more recent VR is privileged but the discrepancy is unresolved

Credit Vintages