Sea Cave True Blue Carbon, Baja California, Mexico

Integrity

The PDD describes additionality using a common-practice test, but the validation report does not confirm that additionality was verified by the VVB, weakening additionality robustness (PDD 2024-11-29; validation report 2024-04-19). The baseline approach and any baseline reassessment timing were not found in the extracted record, which is a major gap for a removal project’s quantification integrity (PDD/validation/monitoring set). Permanence is not substantiated: reversal risk is not discussed and no buffer pool contribution is stated (monitoring report 2024-05-31). Leakage is also not addressed—no deduction percentage or justification is provided (monitoring report 2024-05-31).

Transparency

The monitoring period is clearly stated as 2023-08-01 to 2024-10-01, and the VVB is identified as Earthood, which supports basic transparency (monitoring report 2024-05-31; validation report 2024-04-19). However, the extracted record does not include total claimed or total verified removals for the period, limiting the ability to reconcile issuance with monitoring results (monitoring report 2024-05-31). Key MRV parameters such as baseline method and leakage treatment are also missing from the extracted record, reducing auditability (PDD/validation/monitoring set).

Claim Safety

The project is explicitly not CORSIA-eligible, which reduces the risk of CORSIA-related eligibility misclaims (extracted record). Nonetheless, over-crediting/greenwashing risk remains elevated because the baseline method is not found in the extracted record and leakage and reversal provisions are not addressed (monitoring report 2024-05-31). The inconsistency on whether the VVB verified additionality further increases claim risk because marketing statements could overstate third-party assurance (PDD 2024-11-29; validation report 2024-04-19).

Documentation

The document set includes a PDD, a validation report, and a monitoring report, all recent (2024), which is a reasonable minimum package for review (evidence documents list; monitoring report 2024-05-31; validation report 2024-04-19; PDD 2024-11-29). Extraction confidence is medium, suggesting some readability/structure limitations that can hide key quantitative details. The presence of a direct contradiction between the PDD and validation report on VVB verification of additionality indicates documentation consistency issues that reduce confidence in the record.

Overall

This project scores weakest on integrity because baseline, leakage, and permanence provisions are not evidenced in the extracted record, and additionality assurance is unclear. The key contradiction is that the PDD states additionality was verified by the VVB, while the validation report indicates it was not; the validation report (dated 2024-04-19) is privileged as the higher-authority third-party assurance document over the project-authored PDD (dated 2024-11-29), and the inconsistency lowers confidence and scores. With documentation present but incomplete on core quantification fields, transparency and claim safety are moderate-to-low; note that if integrity were scored below 4.0, an overall cap would apply under the gate rules (not pre-applied here).