50,000 tonnes

The project is exposed to minimal reversal risk. Based on the present understanding, projects applicable to this protocol are categorized as having a Very Low Risk Level of Reversal according to the Isometric Standard Risk Assessment Questionnaire. For bio-oil stored in salt caverns, it is because salt caverns are impermeable (and thus act like a closed system). There should be no reversals unless there is a loss of cavern or well integrity, and this technology does not yet have a documented history of reversals. A 2% buffer pool will be set aside as a precaution against CO₂ or CH4 gas release or C release during brine displacement. For bio-oil stored in permeable reservoirs, there should be no reversals unless there is a loss of caprock or well integrity, and this technology does not yet have a documented history of reversals. However, there is a risk of methane production within the reservoir. A 5% buffer pool will be set aside as a precaution against CO₂ or CH4 gas released. This reversal risk will be reassessed when new scientific research and understanding arises. Reversals will be accounted for by projects and the Isometric Registry as detailed in Section 5.6 of the Isometric Standard.

In the event of a potential reversal, the project's buffer account allocation acts as a safety measure to cover the potential loss of carbon credits. A 2-5% buffer pool according to the Isometric protocol is set aside, depending on where the bio-oil is stored.

Please refer to Section 7 in the methodology document.