USING DIRECT AIR CAPTURE TO MANUFACTURE CARBON-NEGATIVE CONCRETE

Audit Analysis

This DAC-to-carbon-negative-concrete project in the Bahamas is registered under VCS methodology VM0043, but the validation report (September 2024) identified an extraordinary volume of material findings — 17 in total — including an explicit double-counting risk, project boundary gaps, and 16 corrective actions. While additionality was confirmed by the VVB and several safeguards are in place, the absence of a buffer pool, a monitoring report, or any verified emissions data, combined with unresolved CORSIA/CCP eligibility questions, leaves significant uncertainty about the robustness and verifiability of the 5.48 million credit claim.

Project Description

Red Flags

• ⚠Double-counting risk explicitly flagged in the validation report: credits marketed for CMUs versus VM0043 ready-mix concrete overlap
• ⚠17 material findings and 16 corrective actions identified during validation, including an incorrect BECO2,cap,y formula, missing EFcement source, and project boundary that excluded displaced Portland cement facilities
• ⚠No buffer pool and no quantified reversal risk assessment despite permanence depending on long-term concrete durability
• ⚠CORSIA eligibility and CCP status are not stated in any available document, leaving dual-channel crediting risk unaddressed
• ⚠No monitoring report or verified ERR available; the only ERR figure is the ex-ante lifetime estimate from the validation report
• ⚠Storage permanence independent verification not found in available documents

Credit Vintages

No issuances recorded on the registry.