CYY Biopower Wastewater treatment plant including biogas reuse for thermal oil replacement and electricity generation Project, Thailand (300059)_pre-CDM VER

Integrity

The verification report confirms additionality through a barrier test and says the methodology is AM0022 version 4, which supports the project design case. However, the same report lists several material findings, including that the project was not monitoring combustion efficiency and that some required monitoring parameters were not being used in the calculations, so the integrity score is pulled down. No reversal events are reported, but buffer coverage is not stated in the available documents.

Transparency

The file includes a named verifier, a defined monitoring period, and both claimed and verified emission reductions at 14,657, which is a positive sign for traceability. At the same time, important monitoring details are not stated in available documents, including the usage monitoring method and several parameter definitions, and the verifier requested revisions to the monitoring report. The extraction confidence is medium, so documentation quality is not severely impaired, but it is not fully robust either.

Claim Safety

Claim safety is moderate because the claimed and verified emission reductions match exactly in the verification report, which reduces immediate over-crediting concern. Still, the leakage treatment is inconsistent across documents: the verification report says leakage is negligible, while the monitoring report is described as using a quantified approach, and the project’s CORSIA and CCP status are not established. That combination leaves some residual risk around how safely the credits can be marketed.

Documentation

The record draws on three official documents, which is a reasonable base, and the extraction confidence is medium rather than low. Even so, the verifier requested a revised monitoring plan, a revised monitoring report, English translations, and additional supporting evidence, showing that the documentation package was incomplete at the time of verification. The crediting period also differs between the PDD and the verification report, which further weakens documentation consistency.

Overall

The project looks better than a weak file because additionality was VVB-confirmed and the verified emission reductions match the claim, but the monitoring and documentation record is not clean. I privileged the verification report over the PDD for the crediting period because it is the later and more project-specific assurance document, and I privileged the verification report’s leakage statement over the monitoring report where the record is internally inconsistent; however, that contradiction still lowers confidence. The overall score is held down by the verifier’s material findings, the unresolved monitoring gaps, and the inconsistent treatment of leakage and crediting-period dates.