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PURBiochar, 2022United StatesGeneral Methodologyv2.0

Sem-Chi Rice Products Corp. CDR Facility #1

PUR-593074 ↗

#16of 44 in Biochar#17of 115 in United States#29of 109 in Puro.earth (PUR)

5.2/ 10
Integrity
5.5
Transparency
5.0
Claim Safety
5.0
Documentation
5.5

Audit Analysis

A Puro.earth biochar project at a U.S. rice processing facility with VVB-confirmed additionality (investment test) and a grievance mechanism in place, but significant gaps in permanence assurance (no buffer pool or reversal data stated), completely unaddressed leakage, and a project-specific baseline. Three material findings were identified and resolved during verification, yet three corrective actions remain open, and the ERR figures raise a question about whether the ex-ante estimate and the verified figure are on the same temporal basis.

Red Flags

  • Leakage is entirely unaddressed: no deduction percentage and no justification appear in any available document, which is a notable gap for a biochar project where displaced carbon removal or feedstock sourcing shifts could generate leakage.
  • No buffer pool percentage or reversal-event history is stated in the extracted record, leaving the permanence claim for this biochar credit unverified against a concrete safeguard mechanism.
  • The verified ERR of 871.0 tCO₂e for a 14-month monitoring period is roughly four times the pro-rata share (~220 tCO₂e) of the 941.9 tCO₂e five-year ex-ante estimate, suggesting either a very conservative baseline or a mismatch in the temporal basis of the two figures.
  • Three corrective actions from the verification report remain open, including implementing a grievance-tracking method and reassessing stakeholder-engagement reliance at the next verification.

Credit Vintages Exhausted

IssuedRetiredAvailable
2026
8718710
Total8718710

Risk Indicators

Additionality

VVB-confirmed investment test

Permanence

No buffer pool or reversal data stated

Leakage

Not addressed in any document

Baseline

Project-specific; reassessment date not stated

Safeguards

Grievance mechanism present; FPIC not conducted; corrective

Double-claim

CORSIA and CCP status not stated

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Analysis ProvenanceScored2026-08-19General Methodology v2.0

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