SD Biosupply Wastewater Treatment and Biogas Utilization Project

Audit Analysis

A VCS wastewater treatment and biogas project in Thailand with a solid VVB-verified investment additionality test and no permanence risk (non-AFOLU), but undermined by a 0% leakage deduction with no stated justification, 16 material findings including significant calibration gaps and methodology deviations, and a 10.7% gap between claimed and verified emissions reductions in the same monitoring report. The project's claim safety is moderate given the project-specific baseline and unresolved data quality issues.

Project Description

Red Flags

• ⚠16 material findings in the 2024 verification report, including calibration gaps for flow meters, COD colorimeter, and methane analyzer spanning months, plus a methodology deviation for thermal energy calculation
• ⚠Leakage deduction of 0% with justification listed as 'not addressed' in the most recent verification report (2021), despite the earlier 2020 report stating it was 'deemed negligible'
• ⚠Claimed ERR of 77,185 tCO2e in the 2024 monitoring report versus verified ERR of 68,840 tCO2e — a 10.7% reduction that signals over-claiming in the project's own reporting
• ⚠17 corrective actions required across multiple verification cycles, indicating persistent documentation and monitoring quality issues
• ⚠Verification in 2021 was conducted against VCS Standard v4.0 instead of the required v4.1, and AR4 GWP values were used instead of AR5

Credit Vintages