Document ID: chunk:federal_register_of_legislation:F2024C00833:reg:22:p25
Version: federal_register_of_legislation:F2024C00833
Segment Type: reg
Provision Reference: reg 22 (pt 25/29)
Character Range: 295230–297890

Carbon dioxide from decommissioned mines
 (3) If method 4 under section 3.37 is used under subsection (2), that method must be used for estimating fugitive emissions of carbon dioxide that result from the mine.
Note: There is no method 1, 2 or 3 for subsection (3).

Flaring
 (4) For estimating emissions released from coal mine waste gas flared from the mine:
 (a) one of the following methods must be used for estimating emissions of carbon dioxide released:
 (i) method 1 under section 3.38;
 (ii) method 2 under section 3.39;
 (iii) method 3 under section 3.40; and
 (b) method 1 under section 3.38 must be used for estimating emissions of methane released.
 (c) method 1 under section 3.38 must be used for estimating emissions of nitrous oxide released.
Note: The flaring of coal mine waste gas releases emissions of carbon dioxide, methane and nitrous oxide. The same formula is used to estimate emissions of each of these gases. There is no method 4 for emissions of carbon dioxide, no method 2, 3 or 4 for emissions of methane and no method 2, 3 or 4 for nitrous oxide.
 (5) However, for incidental emissions another method may be used that is consistent with the principles in section 1.13.
 (6) If coal mine waste gas from the decommissioned underground mine is captured during the year, method 1 in subsection (2) must not be used.

Subdivision 3.2.4.2—Fugitive emissions from decommissioned underground mines

3.32  Method 1—decommissioned underground mines
 (1) For paragraph 3.31(2)(a), method 1 is:

where:
Edm is the fugitive emissions of methane from the mine during the year measured in CO2‑e tonnes.
Etdm is the emissions from the mine for the last 12 month period before the mine became a decommissioned underground coal mine, measured in CO2‑e tonnes and estimated under section 3.6.
EFdm is the emission factor for the mine calculated under section 3.33.
Fdm is the proportion of the mine flooded at the end of the year, as estimated under section 3.34, and must not be greater than 1.
 (2) However, if, under subsection (1), the estimated emissions in CO2‑e tonnes for the mine during the year is less than 0.02  Etdm, the estimated emissions for the mine during the year is taken to be 0.02  Etdm.

3.33  Emission factor for decommissioned underground mines
  For section 3.32, EFdm is the integral under the curve, for the period between T and T‑N, of:

  where:
A is:
            (a) for a gassy mine—; or
            (b) for a non‑gassy mine—.
T is the number of whole months since the mine became a decommissioned underground coal mine, at the end of the reporting year.
N is:
            (a) if T is less than 12—the value for