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PURBiochar, 2022United KingdomGeneral Methodologyv2.0

BBB - AWJ_Newton Rigg (JNR)

PUR-448190 ↗

#7of 44 in Biochar#4of 8 in United Kingdom#15of 109 in Puro.earth (PUR)

5.5/ 10
Integrity
5.5
Transparency
5.5
Claim Safety
5.0
Documentation
6.5

Audit Analysis

A UK biochar project under the Puro.earth standard with VVB-confirmed additionality and a recent verification, but the first verification surfaced three material findings (mass estimation errors, temperature variance, diesel omission) requiring four corrective actions. Key integrity elements such as buffer pool, leakage treatment, and FNRB are absent from the extracted record, and the project delivered 95% of its five-year credit target in the first eight months, which is plausible for batch biochar production but warrants scrutiny.

Red Flags

  • Three material findings in the verification report: dry biochar mass estimation limitations, pyrolysis temperature variance causing bag exclusions, and diesel usage initially omitted from the LCA
  • Four corrective actions required before credits can be fully validated, including third-party laboratory testing and LCA procedure enhancements
  • No buffer pool percentage, leakage deduction, or FNRB value stated in any available document
  • 95% of the five-year claimed ERR (177.72 of 186.81 tCO2e) was verified in the first 8-month monitoring period, raising questions about whether the baseline was overly conservative or whether production is front-loaded

Credit Vintages Exhausted

IssuedRetiredAvailable
2025
1771770
Total1771770

Risk Indicators

Additionality

VVB-confirmed investment test

Permanence

Biochar inherent stability; no buffer pool stated

Leakage

No leakage deduction or justification found

Baseline

Project-specific; reassessment timing not stated

Safeguards

Grievance mechanism present; FPIC not conducted

Double-claim

CORSIA and CCP status not stated

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Analysis ProvenanceScored2026-08-19General Methodology v2.0

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