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.

Metering and monitoring infrastructure
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 reconciliationHourly
Credit issuanceMonthly
Buyer retirement reportQuarterly
Independent third-party auditAnnual
Metering infrastructure
At the meter
Mass-flow sensors, calibrated weekly against a reference gas.
Standards

Protocols we conform to

Isometric DAC + StorageCertified
Puro.earth CO₂ RemovalCertified
ISO 14064-2 GHGConformant
45Q tax creditQualified

Read the full protocol

The complete MRV methodology, calibration logs, and monitoring data live in the data room, available to evaluators under NDA.