Guizhou Zunyi Landfill Gas Recovery and Utilization Project

Audit Analysis

A CDM landfill gas recovery project in China with VVB-confirmed additionality via an investment test, but undermined by two ER calculation errors, a 23% downward revision in capture efficiency (65% to 50%), a 37% discrepancy in the grid emission factor across documents, and a 0% leakage deduction whose justification is inconsistent between the validation and monitoring reports. The absence of a verified ERR figure, buffer pool, and several key monitoring parameters limits confidence in the claimed 351,384 tCO₂e.

Project Description

Red Flags

• ⚠Grid emission factor differs by 37% between the monitoring report (0.7134) and an undated appendix (0.9762), directly affecting the ER magnitude
• ⚠LFG capture efficiency was revised downward from 65% to 50% during validation, a 23% reduction that materially changes the credit calculation
• ⚠Two separate ER calculation errors (methane emission potential timing for year N and year 2022) were identified and corrected, indicating the initial PDD over-estimated credits
• ⚠Total verified ERR is not stated in the extracted record, preventing independent verification of the 351,384 tCO₂e claim
• ⚠Leakage deduction is 0% yet the justification is contradictory: the validation report (2012) calls it 'deemed negligible' while the monitoring report (2023) calls it 'quantified' without a stated value

Credit Vintages

No issuances recorded on the registry.