Carbon Hill

Audit Analysis

Carbon Hill is a UK biochar removal project under the Puro.earth standard with VVB-confirmed additionality and no material findings, but suffers from significant evidence gaps: no ERR figures (claimed or verified), no documented buffer pool, and no leakage treatment. The project-specific baseline and absence of permanence safeguards (buffer pool, reversal data) leave the core biochar permanence claim largely unverified in the available record.

Project Description

Red Flags

• ⚠No buffer pool percentage documented for a biochar project where permanence is the central claim; reversal risk is unaddressed in the extracted record
• ⚠No leakage deduction or justification stated, despite biochar projects potentially displacing soil carbon or altering land-use baselines
• ⚠Neither claimed nor verified ERR figures are present in the extracted record, making over- or under-crediting impossible to assess
• ⚠One corrective action (Biochar Density) was raised in the verification report, indicating a measurement parameter was not fully compliant at verification

Credit Vintages Exhausted