Document ID: chunk:federal_register_of_legislation:F2024C00833:reg:22:p15
Version: federal_register_of_legislation:F2024C00833
Segment Type: reg
Provision Reference: reg 22 (pt 15/29)
Character Range: 270579–273258

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 the quantity of gas type (j) in coal mine waste gas type (i) captured for combustion from the mine and used during the year, measured in cubic metres and estimated in accordance with Division 2.3.6.
Qij,flared is the quantity of gas type (j) in coal mine waste gas type (i) flared from the mine during the year, measured in cubic metres and estimated in accordance with Division 2.3.6.
Qijtr is the quantity of gas type (j) in coal mine waste gas type (i) transferred out of the mining activities during the year measured in cubic metres.
 (2) The direct measurement of emissions released from the extraction of coal from an underground mine during a year by monitoring the gas stream at the underground mine may be undertaken by one of the following:
 (a) continuous emissions monitoring (CEM) in accordance with Part 1.3;
 (b) periodic emissions monitoring (PEM) in accordance with sections 3.7 to 3.13.
Note: Any estimates of emissions must be consistent with the principles in section 1.13.
 (3) For Qijtr in subsection (1), the quantity of gas type (j) must be estimated in accordance with Division 2.3.6 as if a reference in that Division to quantities of gaseous fuels combusted from the operation of a facility was a reference to quantities of gaseous fuels transferred out of the operation of a facility.

3.7  Estimation of emissions
 (1) To obtain an estimate of the mass emissions rate of gas (j), being methane and carbon dioxide, at the time of measurement at the underground mine, the formula in subsection 1.21(1) must be applied.
 (2) The mass of emissions estimated under the formula must be converted into CO2‑e tonnes.
 (3) The average mass emission rate for gas type (j) measured in CO2–e tonnes per hour for a year must be calculated from the estimates obtained under subsections (1) and (2).
 (4) The total mass of emissions of gas type (j) from the underground mine for the year is calculated by multiplying the average emissions rate obtained under subsection (3) by the number of hours during the year.

3.8  Overview—use of equipment
  The following requirements apply to the use of PEM equipment:
 (a) the requirements in section 3.9 about location of the sampling positions for the PEM equipment;
 (b) the requirements in section 3.10 about measurement of volumetric flow rates in a gas stream;
 (c) the requirements in section 3.11 about measurement of the concentrations of gas type (j) in the gas stream;