Document ID: chunk:federal_register_of_legislation:F2024C00833:reg:2:p1
Version: federal_register_of_legislation:F2024C00833
Segment Type: reg
Provision Reference: reg 2 (pt 1/12)
Character Range: 711313–714230

2                                                         Anaerobic digestion at the facility  0.028                                0

5.22AA  Method 4—emissions of methane and nitrous oxide from biological treatment of solid waste
  For subparagraph 5.3(1)(c)(ii), method 4 is as set out in Part 1.3.

Division 5.2.7—Legacy emissions and non‑legacy emissions

5.22A  Legacy emissions estimated using method 1—sub‑facility zone options
 (1) If a landfill operator estimates emissions of methane released from legacy waste in a landfill using method 1 in Division 5.2.2, the landfill operator may:
 (a) take the whole landfill to be a sub‑facility zone; or
 (b) select sub‑facility zones in accordance with subsections (2) and (3).
 (2) The number of sub‑facility zones the landfill operator may select:
 (a) for sub‑facility zones that contain only waste mix of the type mentioned in paragraph 5.11(1)(i)—is unlimited; and
 (b) for all other sub‑facility zones—must not exceed 4.
 (3) A sub‑facility zone:
 (a) must cover an area of at least 1 hectare; and
 (b) must be a single area within the landfill; and
 (c) must have a uniform composition of waste mix types so that the estimates of the methane generated by the sub‑facility zone are in accordance with section 1.13; and
 (d) must not be subject to:
 (i) landfill gas inflow from another sub‑facility zone; or
 (ii) landfill gas outflow to another sub‑facility zone.
Note: Section 5.17AA sets out, for a landfill operator using method 2 in Division 5.2.3 or method 3 in Division 5.2.4, the number of sub‑facility zones that the landfill operator may select and the requirements for sub‑facility zones that the landfill operator must comply with.

5.22B  Legacy emissions—formula and unit of measurement
 (1) Emissions (the legacy emissions) from legacy waste must be estimated in tonnes of CO2‑e using the following formula:
where:
Elw is the quantity of methane released by the landfill from legacy waste, measured in CO2‑e tonnes.
CH4genlw is the quantity of methane generated from legacy waste, measured in CO2‑e tonnes.
γ is the factor 6.784 × 10‑4 × GWPmethane converting cubic metres of methane at standard conditions measured to CO2‑e tonnes.
Qcaplw is the quantity of methane captured for combustion from landfill legacy waste during a reporting year and estimated in accordance with section 5.22C.
Qfllw is the quantity of methane flared from landfill legacy waste during the reporting year and estimated in accordance with section 5.22D.
Qtrlw is the quantity of methane captured for transfer out of the landfill from landfill legacy waste during the reporting year and estimated according to section 5.22E.
OF is the oxidation factor (0.1) for near surface methane in the landfill.
 (2) Work out the ratio of methane generated by legacy waste deposited in a sub‑facility zone to methane generated by all waste deposited in a sub‑facility zone using