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.

Open the data room See the verification report