Methodology · MRV
Every ton is measured, reported, and verified — never modeled
Our measurement, reporting, and verification protocol is the reason a Terravault ton survives diligence. This is how a molecule of CO₂ becomes a credit you can defend.
Continuous flow metering · Facility 02
The measurement chain
Three meters, one reconciled number
CO₂ is metered at every point it moves. Nothing is estimated between them.
M1
Capture meter
Mass-flow sensors log concentrated CO₂ leaving each contactor in real time, calibrated weekly against a reference gas.
M2
Injection meter
A second independent meter records exactly what enters the wellhead for mineralization — the ton that actually goes underground.
M3
Reconciliation
Capture and injection totals are reconciled hourly. Any variance beyond 0.5% flags the batch for review before a credit is issued.
From gross capture to a defensible credit
What we subtract before we count a ton
Gross CO₂ captured & injected
Reconciled meter total
1.000 t
Energy & process emissions
Grid, heat, and on-site combustion, full lifecycle
− 0.11 t
Transport & injection
Compression, pumping, and wellhead energy
− 0.02 t
Net durable removal credited
The only number we sell
0.87 t
Permanence monitoring
We keep watching after the ton is stored
Mineralization converts CO₂ to solid carbonate rock in under two years. We monitor the reservoir long after, so permanence is observed, not assumed.
✓
Seismic sensors track reservoir integrity in real time
✓
Core samples confirm carbonate formation on a fixed cadence
✓
Groundwater geochemistry checked quarterly for the life of the site
Reporting cadence
Meter reconciliation
Hourly
Credit issuance
Monthly
Buyer retirement report
Quarterly
Independent third-party audit
Annual
At the meter
Mass-flow sensors, calibrated weekly against a reference gas.
Standards
Protocols we conform to
Isometric DAC + Storage
Certified
Puro.earth CO₂ Removal
Certified
ISO 14064-2 GHG
Conformant
45Q tax credit
Qualified