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GSOtherTanzania, United Republic ofAMS-III.F

Mabwepande Composting Facility for Market Waste

GS-1690 ↗ · current registry ID: GS5988

#849of 1329 in Industrial#10of 19 in Tanzania#1253of 1801 in Gold Standard (GS)#33of 43 in AMS-III.F

4.6/ 10
Integrity
4.5
Transparency
5.5
Claim Safety
3.8
Documentation
4.5

Audit Analysis

The Mabwepande composting project has VVB-confirmed additionality and a reasonable 0% leakage assumption for its sector, but is undermined by a large volume of material findings (17 items) and corrective actions (12 items) covering calculation errors, missing documentary evidence, and a two-year crediting-period shift. The verified emissions reduction of 4,509 tCO₂e represents only about 11% of the pro-rata expectation for the elapsed monitoring period, raising serious questions about the ex-ante estimate's realism. Multiple transparency and documentation gaps (no FNRB, no buffer pool, no FPIC, no CORSIA/CCP status) further weaken the project's credibility.

Red Flags

  • Verified ERR of 4,509 tCO₂e is only ~11% of the pro-rata expectation (~40,221 tCO₂e) for the 20-month monitoring period out of the 60-month crediting period, suggesting the ex-ante lifetime estimate of 120,662 tCO₂e may be substantially overstated
  • 17 material findings and 12 corrective actions in the verification report, including multiple calculation errors (CAR-1 to CAR-7), missing documentary evidence (CL-1 to CL-5), and a two-year shift in the crediting period start date
  • Crediting period shifted from 2020-06-01 (PDD) to 2021-09-01 (monitoring report) without clear evidence that the baseline remains conservative (CAR-3)
  • Safeguards documentation is contradictory: the 2023 verification report confirms safeguards and a grievance mechanism, but the 2020 monitoring report records safeguards as not mentioned

Credit Vintages Exhausted

IssuedRetiredAvailable
2021
4944940
2022
2,9682,9680
2023
1,0471,0470
Total4,5094,5090

Risk Indicators

Additionality

VVB-confirmed (SustainCERT)

Permanence

low inherent reversal risk for compost

Leakage

0% deemed negligible; reasonable for sector but documentation contradictory

Baseline

Project-specific, modelled; no reassessment date; 2-year period shift unverified

Safeguards

Grievance mechanism and benefit sharing present; no FPIC; documentation inconsistent

Double-claim

CORSIA and CCP status not stated in available documents

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Analysis ProvenanceScored2026-09-05AMS-III.F

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