Document ID: chunk:federal_register_of_legislation:F2024C00833:reg:1
Version: federal_register_of_legislation:F2024C00833
Segment Type: reg
Provision Reference: reg 1
Character Range: 346061–348579

1     Onshore natural gas wellheads  1.32 × 10‑3                        2.60 × 10‑6  tonnes CO2‑e/t gas throughput

3.73B  Method 2—onshore natural gas production, other than emissions that are vented or flared—wellheads
 (1) Method 2 is:

  Eij  = Σk (Tik   ×  Nik ×EFijk) × Sij/SDij

where:
Eij is the fugitive emissions (other than emissions that are vented or flared) of gas type (j), being methane or carbon dioxide, from the onshore natural gas production during the year measured in CO2‑e tonnes.
Σk is the total emissions of gas type (j), being methane or carbon dioxide, measured in CO2‑e tonnes and estimated by summing up the emissions released from each equipment type (k) specified in column 2 of an item in the table in subsection (2), if the equipment is used in the onshore natural gas production.
Tik is the average hours of operation during the year of the equipment of each equipment type (k), if the equipment is used in the onshore natural gas production during the year.
Nik is the total number of equipment units of each equipment type (k), if the equipment type is used in the onshore natural gas production during the year.
EFijk is the emission factor of gas type (j), being methane or carbon dioxide, measured in tonnes of CO2‑e per equipment type (k) – hour as determined under subsection (2), if the equipment is used in the onshore natural gas production.
Note: Consistent with subsection 3.41(2), emissions associated with any piece of equipment included in this definition should not be counted under this section if those emissions are also counted as equipment emissions under another section within this Part.
Sij  is the measured share of each gas type (j), being methane or carbon dioxide, in the unprocessed gas (i), by volume, measured in accordance with Division 2.3.3 and the principles in section 1.13.
SDij is the default share of gas type (j) in the unprocessed gas (i), for methane SD is 0.788 and for carbon dioxide SD is 0.02.
 (2) For EFijk in subsection (1):
 (a) column 3 of an item in the following table specifies the emission factor for methane (j) for an equipment type (k) specified in column 2 of that item and column 4 of an item in the following table specifies the emission factor for carbon dioxide (j) for an equipment type (k) specified in column 2 of that item:
Item  Equipment type (k)                           Emission factor for gas type  (j)

                                                   CH4                                 CO2          Units