Chol Charoen Group Wastewater Treatment with Biogas System I (Khonkaen)

Audit Analysis

A registered VCS biogas/wastewater project in Thailand with confirmed additionality and conservative measurement adjustments, but undermined by a high volume of material findings (10), corrective actions (12), and ten cross-document contradictions. The 0% leakage deduction lacks a clear justification, no buffer pool is documented, and a methodology-version discrepancy (AMS III.H v9 flagged as expired) raises baseline-validity concerns. The project appears to be over-delivering relative to its ex-ante estimate, which is positive for claim safety, but the documentation and governance issues limit confidence in the overall integrity of the credit.

Project Description

Red Flags

• ⚠Ten material findings reported in the verification report, including delayed calibration of the boiler gas flow meter, unavailable calibration records for electricity meters, and a VVB rotation violation
• ⚠Corrective actions reference an expired methodology version (AMS III.H v9) and a compliance gap in paragraph 34 of that methodology, while the project is listed under AMS-I.D v14 — the relationship between the two is unexplained
• ⚠Leakage deduction is 0% with the justification recorded as 'not addressed' in the 2021 verification report, contradicting an earlier 'deemed negligible' statement in the 2020 report
• ⚠No buffer pool percentage is stated in any available document, leaving permanence risk unquantified
• ⚠Ten contradictions across documents, including a crediting-period discrepancy (2009–2019 vs 2019–2029) and a total-ERR-verified discrepancy (8,317 vs 101,550 tCO₂e)

Credit Vintages