Document ID: chunk:federal_register_of_legislation:F2024L00823:clause:1_22
Version: federal_register_of_legislation:F2024L00823
Segment Type: clause
Provision Reference: sch 1 cl 22
Character Range: 9966–11508

22  At the end of section 3.87A
Add:

       3.87B  Method 2B—Natural gas production mass balance approach (flared methane and carbon dioxide emissions)

       Method 2B is:

       (1) For methane emissions:

       Where:

    ECH4 is the total methane emissions, in tonnes of CO2-e.

         Qmethane  is the total quantity of methane within the flared gas (k), in tonnes, calculated through a mass balance.

    OFk is 0.98, which is the destruction efficiency of gas k.

         GWPmethane is the global warming potential of methane as prescribed in the Regulations.

       (2) For carbon dioxide emissions:
       Where:

    ECO2 is the total carbon dioxide emissions, in tonnes of CO2-e.

         Qh is the total quantity of hydrocarbons (h) within the flared gas (k), in tonnes, calculated through a mass balance.

         CFk is the carbon weight fraction within the hydrocarbon component of the flared gas k.

    OFk is 0.98, which is the destruction efficiency of gas k.

         QCO2 is the quantity of carbon dioxide within the flared gas, in tonnes, calculated through the same mass balance approach as the estimate for methane content.

     is the Carbon to CO2 mass conversion factor.

    Note: Mass balance refers to the Carbon mass balance approach set out in the 2021 API Compendium.

    Note 2: If this method is used to methane emissions, it must also be used to estimate carbon dioxide emissions. Likewise, if it is used to estimate carbon dioxide emissions, it must be used to estimate methane emissions.