Document ID: chunk:federal_register_of_legislation:F2024C00833:reg:22:p14
Version: federal_register_of_legislation:F2024C00833
Segment Type: reg
Provision Reference: reg 22 (pt 14/29)
Character Range: 268175–270821

of the following methods must be used for estimating emissions of nitrous oxide released:
 (i) method 1 under section 3.14;
 (ii) method 2 under section 3.15A.
Note: The flaring of coal mine waste gas releases emissions of carbon dioxide, methane and nitrous oxide. The reference to gas type (j) in method 1 under section 3.14 or method 2 under section 3.15A is a reference to these gases. The same formula in Method 1 is used to estimate emissions of each of these gases. There is no method 4 for emissions of carbon dioxide and no method 3 or 4 for emissions of methane or nitrous oxide.

Venting or other fugitive release before extraction of coal
 (5) Method 4 under Part 1.3 must be used for estimating fugitive emissions of each gas type, being carbon dioxide and methane, that result from venting or other fugitive release of gas from the underground mine before coal is extracted from the mine.
Note: There is no method 1, 2 or 3 for subsection (5).

Post‑mining activities
 (6) Method 1 under section 3.17 must be used for estimating fugitive emissions of methane that result from post‑mining activities related to a gassy mine.
Note: There is no method 2, 3 or 4 for subsection (6).
 (7) However, for incidental emissions, another method may be used that is consistent with the principles in section 1.13.

Subdivision 3.2.2.2—Fugitive emissions from extraction of coal

3.5  Method 1—extraction of coal
  For subsection 3.32(1), method 1 is:

where:
Ej is the fugitive emissions of methane (j) that result from the extraction of coal from the mine during the year measured in CO2‑e tonnes.
Q is the quantity of run‑of‑mine coal extracted from the mine during the year measured in tonnes.
EFj is the emission factor for methane (j), measured in CO2‑e tonnes per tonne of run‑of‑mine coal extracted from the mine, as follows:
 (a) for a gassy mine—0.407;
 (b) for a non‑gassy mine—0.011.

3.6  Method 4—extraction of coal
 (1) For subsections 3.4(2) and (3), method 4 is:

where:
Ej is the fugitive emissions of gas type (j) that result from the extraction of coal from the mine during the year, measured in CO2‑e tonnes.
CO2‑e j gen, total is the total mass of gas type (j) generated from the mine during the year before capture and flaring is undertaken at the mine, measured in CO2‑e tonnes and estimated using the direct measurement of emissions in accordance with subsection (2).
γj is the factor for converting a quantity of gas type (j) from cubic metres at standard conditions of pressure and temperature to CO2‑e tonnes, being:
 (a) for methane—6.784 × 10‑4 × GWPmethane; and
 (b) for carbon dioxide—1.861 × 10‑3.
Qij,cap is