Chestnut Carbon Conservation Project

Audit Analysis

The Chestnut Carbon Conservation Project is a VCS ALM soil-carbon project in the US with a VVB-confirmed investment additionality test, a 15% buffer pool, and a 20% quantified leakage deduction. However, significant contradictions between the PDD and validation/verification reports (leakage 0.2% vs 20%, additionality test type, ERR figures) and a project-specific baseline reduce confidence. The first monitoring period delivered 85% of its period-specific ex-ante estimate, which is reasonable for a nascent soil-carbon project, but the lifetime pro-rata delivery is only ~1.4%, reflecting the slow build-up typical of soil sequestration.

Project Description

Red Flags

• ⚠Leakage deduction contradicts between documents: the validation report states 20% while the PDD states 0.2% — a 100× discrepancy that undermines confidence in the leakage treatment
• ⚠Additionality test type is inconsistent: the validation report confirms an investment test while the PDD describes a combined test; the VVB-confirmed investment test is privileged but the discrepancy is unexplained
• ⚠Material findings reveal that ex-ante and ex-post removal figures were initially inconsistent across PD/MR sections, the buffer reserve calculation was initially incorrect, and the Non-Permanence Risk Report lacked justifications — all corrected but indicative of initial documentation weakness
• ⚠FPIC was not conducted, which is a gap for a project in the US where indigenous land rights may be relevant
• ⚠Low extraction confidence across the document set limits the reliability of the structured data used for scoring

Credit Vintages