Caieiras landfill gas emission reduction
#21of 189 in Methane#20of 211 in Brazil#359of 1459 in CDM (UNFCCC)#19of 159 in ACM0001
Audit Analysis
The Caieiras landfill gas project is a straightforward methane avoidance project under CDM with a VVB-confirmed combined additionality test and a measured baseline. However, a material finding regarding flare efficiency calculation, inconsistent leakage documentation between the PDD and monitoring report, and a missing verified ERR figure introduce moderate concerns about the robustness of the claimed reductions. The project is in its first monitoring period, so the track record is still limited.
Red Flags
- Material finding (CAR 1): the PDD failed to apply the required 10-percentile adjustment to flare efficiency for low-height enclosed flares, indicating a potential over-estimation of project emissions and under-estimation of net reductions
- Leakage treatment is inconsistent: the PDD states leakage was quantified, yet the monitoring report records the justification as not addressed, leaving the 0% deduction unsupported in the operational record
- Verified ERR figure is not available in the extracted record, preventing independent confirmation of the 438,295 tCO2e claimed for the first monitoring period
- Grid emission factor differs substantially between the PDD (0.5181) and the monitoring report (1.3), a 2.5× discrepancy that affects the baseline calculation
Credit Vintages
| Issued | Retired | Available | ||
|---|---|---|---|---|
| 2008 | 103,035 | 0 | 103,035 | |
| 2012 | 1,352,230 | 0 | 1,352,230 | |
| 2013 | 1,061,191 | 0 | 1,061,191 | |
| 2015 | 1,191,556 | 0 | 1,191,556 | |
| 2016 | 374,022 | 0 | 374,022 | |
| 2017 | 328,135 | 0 | 328,135 | |
| 2018 | 1,035,182 | 0 | 1,035,182 | |
| 2019 | 2,102,074 | 0 | 2,102,074 | |
| 2020 | 1,354,577 | 0 | 1,354,577 | |
| 2021 | 438,205 | 0 | 438,205 | |
| 2023 | 500,517 | 0 | 500,517 | |
| Total | 9,840,724 | 0 | 9,840,724 |
Risk Indicators
Combined test, VVB-confirmed, capture not legally required
Avoidance project, no reversal events reported
0% deduction, justification inconsistent between PDD and mon
Project-specific baseline, measured vs modeled contradiction
Safeguards and benefit sharing mentioned, but FPIC and griev
CORSIA and CCP status not stated in available documents
⚑ Dispute this rating
Are you the project owner?
Metadata correction (free)
Name, country, marketplace or links incorrect? Let us know.
Does not modify the score.
[email protected] →Pipeline re-run with new documents
Have updated documentation not yet included? You can request a new run of the pipeline with the new inputs.
Submit Documents →Share this rating
