VP Biosupply Wastewater Treatment and Biogas Utilization Project
#52of 268 in Biogas#17of 48 in Thailand#560of 1339 in Verra (VCS)#12of 55 in AMS-III.H
Audit Analysis
A long-running Thai wastewater-to-biogas project with VVB-confirmed regulatory additionality and no reversal risk, but plagued by persistent data-quality issues, multiple methodology deviations, and a 206% over-delivery versus ex-ante estimates that was never adequately assessed. The project's integrity is further weakened by the absence of a stated buffer pool and a project-specific modeled baseline relying on a 2017 grid emission factor.
Red Flags
- Achieved GHG emission reductions are 206.63% higher than ex-ante estimates, yet the verification report notes no assessment of the additionality implications or whether project design changes drove the increase
- Multiple recurring methodology deviations across monitoring periods: destruction efficiency set to 100% for combusted biogas, baseline thermal energy estimated from historical fuel-oil consumption rather than direct measurement, and flare efficiency set to 0%
- Significant ERR figure discrepancies across documents: the monitoring report claims 27,604 tCO2e, the verification report records 3,853 tCO2e, and the issuance document shows 84,642 tCO2e — the basis for each figure is unclear
- Low extraction confidence across 47 source documents, indicating at least one key document was poorly readable or incomplete
Credit Vintages
| Issued | Retired | Available | ||
|---|---|---|---|---|
| 2006 | 12,385 | 12,385 | 0 | |
| 2007 | 17,088 | 17,088 | 0 | |
| 2008 | 5,664 | 5,664 | 0 | |
| 2009 | 19,801 | 19,801 | 0 | |
| 2010 | 20,004 | 20,004 | 0 | |
| 2011 | 5,330 | 5,330 | 0 | |
| 2012 | 31,205 | 31,205 | 0 | |
| 2013 | 22,910 | 22,910 | 0 | |
| 2014 | 46,113 | 46,113 | 0 | |
| 2015 | 48,705 | 48,306 | 399 | |
| 2016 | 38,250 | 38,250 | 0 | |
| 2017 | 45,361 | 45,361 | 0 | |
| 2018 | 59,993 | 59,993 | 0 | |
| 2019 | 40,041 | 40,041 | 0 | |
| 2020 | 52,104 | 36,978 | 15,126 | |
| 2021 | 29,255 | 3,333 | 25,922 | |
| 2022 | 700 | 149 | 551 | |
| Total | 494,909 | 452,911 | 41,998 |
Risk Indicators
VVB-confirmed regulatory test
mixed evidence / unresolved risk
Deemed negligible, reasonable for wastewater-biogas
Project-specific modeled baseline, 2017 grid EF
Grievance mechanism and benefit sharing present; FPIC not st
CORSIA and CCP status not stated in available documents
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