Tierra Prieta - Parras

Audit Analysis

The Tierra Prieta–Parras biochar project has a confirmed investment-test additionality and a sound biochar methodology, but the March 2026 verification report issued a Qualified Conclusion with eight material findings and three formal Corrective Action Requests, revealing significant data-quality weaknesses in emissions accounting, mass-balance records, and transport calculations. No buffer pool, leakage treatment, or FPIC process is documented, and the project-specific baseline has no stated reassessment schedule, leaving meaningful gaps in permanence and additionality safeguards.

Project Description

Red Flags

• ⚠Qualified Conclusion issued by the VVB (EnergyLink Services) due to three formal Corrective Action Requests, indicating the verifier could not fully confirm the reported emissions reductions.
• ⚠CH₄ emissions were calculated using wet mass instead of dry mass in the life-cycle assessment, and delivery distances were inflated by an erroneous 896 km added to all export routes — both errors directly distort the net credit quantity.
• ⚠No buffer pool, no quantified leakage deduction, and no FPIC process are documented, leaving permanence, leakage, and social-safeguard risks unaddressed.
• ⚠Two verification reports (Aug 2025 and Mar 2026) report materially different ERR figures (≈482 t vs ≈1,015 t claimed), creating uncertainty about which monitoring period each covers and whether earlier credits were correctly quantified.

Credit Vintages Exhausted