Methane Recovery and Biogas Utilization Project, Lao Cai Province, Vietnam

Audit Analysis

This Gold Standard methane recovery and biogas cogeneration project in Vietnam has a VVB-verified investment additionality test and a measured project-specific baseline, but is undermined by six material calculation findings, 28 corrective actions, a contradictory leakage justification, and the absence of a buffer pool. The project over-delivers relative to its pro-rata ex-ante expectation (135% for the elapsed monitoring year), which is reassuring, yet the volume of unresolved calculation errors and documentation gaps significantly erodes confidence in the reported credit figures.

Project Description

Red Flags

• ⚠Six material findings in the 2025 verification report include incorrect calculations of biogas energy (BEww,discharge,y), missing project-emission calculations from fossil fuel consumption, and inconsistent ex-ante parameter values between the monitoring report and ER sheet — all of which cast doubt on the reliability of the 34,611 tCO2e figure.
• ⚠Leakage is deducted at 0%: the PDD (2020) states it was 'deemed negligible' while the 2025 verification report records it as 'not addressed,' leaving no quantified or justified treatment for a project type where displaced biogas or methane re-release is plausible.
• ⚠Twenty-eight corrective actions were required by the VVB, spanning missing ex-ante and ex-post parameters, inconsistent crediting-period dates, incorrect GWP values, and absent safeguarding-principle monitoring — indicating systemic documentation and calculation weaknesses.
• ⚠Free, Prior and Informed Consent (FPIC) was not conducted, despite the project operating in a provincial community in Vietnam and claiming benefit-sharing.

Credit Vintages