Document ID: chunk:federal_register_of_legislation:F2024C00833:reg:4:p5
Version: federal_register_of_legislation:F2024C00833
Segment Type: reg
Provision Reference: reg 4 (pt 5/9)
Character Range: 634283–637079

measured in tonnes; and
 (c) lost through decomposition;
must be calculated using the equation mentioned in subsection (3).
 (3) For subsection (2), the equation is:

where:
t is the reporting year.
CH4* is the estimated quantity of methane in landfill gas generated by the landfill during the year, measured in CO2‑e tonnes.
F is the fraction of methane generated in landfill gas estimated in accordance with section 5.14C.
1.336 is the factor to convert a mass of carbon to a mass of methane.
Note 1: For the definition of reporting year, see the National Greenhouse and Energy Reporting Regulations 2008.
Note 2: If the result of the first equation in subsection 5.4(3):
(a) was, for a previous reporting year or years, greater than the collection efficiency limit for the landfill calculated in accordance with section 5.15C; and
(b) is, for the current reporting year, less than or equal to the collection efficiency limit for the landfill calculated in accordance with section 5.15C;
 use:
(c) the calculation in section 5.4B to calculate the change in the opening stock of carbon for the final reporting year in which the result of that equation is greater than the collection efficiency limit for the landfill calculated in accordance with section 5.15C; and
(d) the calculation in section 5.4C to calculate the closing stock for that reporting year.

5.4C  Equation—quantity of closing stock at landfill in particular reporting year
 (1) For subsection 5.4(4), this section applies if the result of the first equation in subsection 5.4(3) is, for the reporting year for which the result is calculated, (the current reporting year), greater than the collection efficiency limit for the landfill calculated in accordance with section 5.15C.
 (2) The quantity of closing stock of decomposable degradable organic carbon (Ccst) in the most recent year to which subsection 5.4(3) applies:
 (a) located in the landfill during the reporting year; and
 (b) measured in tonnes;
must be calculated using the equation mentioned in subsection (3):
 (3) For subsection (2), the equation is:

where:
Ccst is the closing stock of carbon in the last year in which subsection 5.4(3) was used to calculate emissions.
Cost is the opening stock of carbon in the first year in which 5.4(3) was used to calculate emissions.
∆Cost is the change in carbon stock for all years in which 5.4(3) applies and is estimated in accordance with 5.4B.
Note: The quantity of closing stock calculated in accordance with this section is the same as the quantity of opening stock for the current reporting year.

5.4D  Equation—quantity of methane generated by landfill for calculating CH4gen
  For subsection 5.4(4), the quantity of methane generated by the landfill must be calculated using the following equation:

where: