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GSBiogas - ElectricityTurkeyAMS-III.G

Tokat Landfill Gas to Electricty Project

GS-1629 ↗ · current registry ID: GS3852

#103of 268 in Biogas#212of 295 in Turkey#886of 1801 in Gold Standard (GS)#16of 34 in AMS-III.G

5.0/ 10
Integrity
5.5
Transparency
4.5
Claim Safety
5.5
Documentation
4.0

Audit Analysis

The Tokat Landfill Gas to Electricity Project is a Gold Standard biogas project with confirmed additionality and no reported reversal events, but it is undermined by a high volume of corrective actions (24 items), multiple cross-document contradictions on leakage treatment, baseline methodology, and ERR figures, and the absence of a buffer pool or stated permanence mechanism. The project over-delivered relative to its ex-ante estimates (approximately 162% of the pro-rata expectation for the elapsed monitoring period), which is a positive signal of conservative assumptions, yet the 0% leakage deduction rests on a justification that is contradicted by the earlier monitoring report.

Red Flags

  • 24 corrective actions were required by the VVB, including substantive issues such as incomplete monitoring report sections, missing calibration certificates, and contradictions in crediting period dates across documents
  • Leakage deduction is 0% with a 'quantified' justification in the 2026 verification report, but the 2020 monitoring report indicates leakage was 'not addressed' — a direct contradiction on a material parameter
  • Baseline methodology is described as 'measured' in the 2020 monitoring report but 'modeled' in the 2022 PDD, creating uncertainty about the actual baseline construction
  • No buffer pool percentage or permanence claim is stated in any available document, leaving reversal risk unquantified
  • FPIC was not conducted, and safeguards documentation is inconsistent between the verification report (present) and the monitoring report (absent)

Credit Vintages

IssuedRetiredAvailable
2020
4,2234,2230
2021
27,32627,3260
2022
30,38916,33114,058
2023
34,577034,577
2024
40,719040,719
2025
7,04407,044
Total144,27847,88096,398

Risk Indicators

Additionality

VVB-confirmed combined test

Permanence

mixed evidence / unresolved risk

Leakage

0% deduction with contradictory justification

Baseline

Project-specific; measured vs modeled contradiction

Safeguards

Grievance mechanism present but FPIC not conducted; docs inconsistent

Double-claim

CCP and CORSIA statuses not stated

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Analysis ProvenanceScored2026-09-06AMS-III.G & AMS-I.D.

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