# How do we count an accidental gas or refrigerant release in Scope 1?

Canonical: https://senseible.earth/answers/accidental-gas-release-scope-1-how-to-count

Count it. Estimate the mass released and multiply by its global warming potential. A refrigerant burst counts at the gas GWP. A natural gas leak counts as methane at 29.8 times CO2. Unburned LPG is not one of the reported greenhouse gases, but record the incident and the fix.

## How to estimate the mass

- Refrigerant: the top-up needed to refill the system after repair.
- Gas cylinders: weight before and after.
- Pipeline gas: meter readings or an engineering estimate of leak time and flow.

## What to keep

- The incident report with date and cause.
- The refill invoice or cylinder weights.
- The repair record, so the leak is not counted twice.

## What Senseible does here

Senseible keeps each record linked to its source document and marks estimates as estimates, so a verifier can see what was measured and what was assumed.

- [Refrigerant leakage without records](https://senseible.earth/answers/estimate-refrigerant-leakage-without-records)
- [Refrigerant top-up to CO2e](https://senseible.earth/answers/refrigerant-top-up-invoice-to-co2e)
- [19 kg LPG cylinder](https://senseible.earth/answers/lpg-19-kg-cylinder-co2)

Sources: [GHG Protocol Corporate Standard](https://ghgprotocol.org/corporate-standard), [IPCC AR6 Working Group I](https://www.ipcc.ch/report/ar6/wg1/), [2006 IPCC Guidelines for National Greenhouse Gas Inventories](https://www.ipcc-nggip.iges.or.jp/public/2006gl/)

Last reviewed 2026-10-23.