Xuyong household biogas Gold Standard VER Project
GS-30 ↗ · current registry ID: GS1033
#74of 268 in Biogas#539of 1084 in China#664of 1801 in Gold Standard (GS)
Audit Analysis
The Xuyong household biogas project has a verified additionality assessment and an independent VVB, but is undermined by a 0% leakage deduction with no documented justification, a project-specific baseline with no recorded reassessment, and 12 outstanding corrective actions. The verified ERR for the most recent monitoring period matches the claimed figure, though the project delivered roughly 72% of the pro-rata lifetime expectation for the elapsed period, and several key data points (FNRB, grid emission factor, carbon content testing) are absent from the record.
Red Flags
- Leakage deduction is 0% and the justification is recorded as 'not addressed' in the most recent monitoring report (2023-09-04), leaving no documented basis for the zero deduction
- Twelve corrective actions were required by the VVB (SustainCERT) in the verification report dated 2023-09-08, including clarifying annual average ERs, correcting digester counts, and submitting survey team details and training records
- Usage rate was assumed at 100% in the PDD but verified at only 95% in the 2023 monitoring report, indicating a 5% over-claim in the ex-ante estimate
- No FPIC (Free, Prior and Informed Consent) documentation was found in the extracted record despite the project serving rural households in China
Credit Vintages
| Issued | Retired | Available | ||
|---|---|---|---|---|
| 2012 | 3,745 | 3,671 | 74 | |
| 2013 | 4,687 | 4,672 | 15 | |
| 2014 | 4,687 | 4,687 | 0 | |
| 2015 | 4,676 | 4,676 | 0 | |
| 2016 | 4,619 | 4,619 | 0 | |
| 2017 | 4,597 | 4,597 | 0 | |
| 2018 | 4,459 | 4,459 | 0 | |
| 2019 | 4,584 | 4,584 | 0 | |
| 2020 | 4,541 | 2,996 | 1,545 | |
| 2021 | 4,766 | 93 | 4,673 | |
| 2022 | 539 | 10 | 529 | |
| Total | 45,900 | 39,064 | 6,836 |
Risk Indicators
VVB-confirmed combined test
Biogas – no carbon-stock reversal risk
0% deduction, justification not addressed
Project-specific, no reassessment date
Grievance mechanism present, FPIC not documented
CORSIA and CCP status not stated
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