Methane Recovery and Biogas Utilization Project, Quang Tri Province, Vietnam

Audit Analysis

A Gold Standard methane recovery and biogas cogeneration project in Vietnam with VVB-confirmed additionality and no reported reversals, but undermined by a 0% leakage deduction with no justification in the latest verification report, a project-specific baseline, and a severe contradiction in the ex-ante lifetime ERR (180 vs. ~180,641 tCO₂e) that raises material data-reliability concerns. The volume of calculation errors and clarifications required across multiple verification cycles further erodes confidence in the credit figures.

Project Description

Red Flags

• ⚠Ex-ante lifetime ERR contradicts between the PDD (180 tCO₂e) and the monitoring report (~180,641 tCO₂e) — a factor-of-1,000 discrepancy that is unresolved and undermines the entire credit-quantity basis
• ⚠Leakage deduction is 0% and the most recent verification report (Jan 2025) records the justification as 'not addressed', while an earlier monitoring report (Oct 2020) claimed it was 'deemed negligible' — no quantified or documented leakage analysis exists in the current record
• ⚠Eleven or more corrective actions and clarifications were required across verification cycles, including calculation errors in BEww,discharge,y, methane content (wCH4), volumetric fractions, and a formula error in the EG thermal calculation, indicating systemic MRV quality-control weaknesses
• ⚠Crediting-period start date is contradictory (2017-12-21 vs. 2022-12-21), making the pro-rata delivery ratio impossible to determine with confidence

Credit Vintages