Document ID: chunk:federal_register_of_legislation:F2024C00833:reg:4:p1
Version: federal_register_of_legislation:F2024C00833
Segment Type: reg
Provision Reference: reg 4 (pt 1/2)
Character Range: 421217–423880

4     Screw compressor             2.88 × 10‑2                         6.03 × 10‑5  tonnes CO2‑e per equipment – hour

3.78E  Method 3—natural gas storage (other than emissions that are vented or flared)

 (1) Method 3 is:
 Ej = ∑k (Tk × EFjk × Nk)
where:
Ej is the fugitive emissions (other than emissions that are vented or flared) of gas type (j) measured in CO2‑e tonnes from the natural gas storage during the year.
Σk is the total emissions of gas type (j) measured in CO2‑e tonnes and estimated by summing up the emissions released from each component type (k), if the component is used in the natural gas storage.
EFjk is the emission factor of gas type (j) measured in tonnes of CO2‑e per component‑hour that passes through each component type (k) as determined under subsection (2) or (3), if the component is used in the natural gas storage.
Tk is:
 (a) if subsection (2) applies—the average hours of operation during the year of the component of each component type (k), if the component is used in the onshore natural gas storage; or
 (b) if subsection (3) applies—an engineering estimate of the number of hours in the year the component type (k) was operational as a leaker or non leaker based on the best available data and subsection (4).
Nik is the total number of each component type (k) listed in section 6.1.3 of the API Compendium if the component type is used in the natural gas storage during the year.
 (2) Unless subsection (3) is elected and used for all components under this method, EFijk, the emission factors for methane or carbon dioxide (j), for component type (k), are:
 (a) as listed in Table 6‑18 in section 6.1.3 of the API Compendium, for the component type; or
 (b) as listed in that Compendium for the component type with emission factors adjusted for variations in estimated gas composition, in accordance with that Compendium's Table 6‑18 in section 6.1.3, and the requirements of Division 2.3.3; or
 (c) if the manufacturer of the component supplies component‑specific emission factors for the component type—those factors.
 (3) If an LDAR program has been carried out at the facility in relation to natural gas storage components in accordance with subsection (4) and this subsection elected for all components under this method, EFijk, the emission factors for methane or carbon dioxide (j), for component type (k), are:
 (a) column 3 of an item in the following table specifies the emission factor for methane (j) for a component and leaker/non‑leaker type (k) specified in column 2 of that item; and
 (b) column 4 of an item in the following table specifies the emission factor for carbon dioxide (j) for a component