Document ID: chunk:federal_register_of_legislation:F2015L01230:reg:20
Version: federal_register_of_legislation:F2015L01230
Segment Type: reg
Provision Reference: reg 20
Character Range: 25184–27156

20  Density of a re‑routed gas quantity
  The density of a re‑routed gas quantity in relation to a flare device, in kilograms per cubic metre, is worked out using the formula (equation 7):
where:
dTOTAL,i means the density of the re‑routed gas quantity in relation to flare device i, in kilograms per cubic metre.
s means the number of component gases present in the re‑routed gas quantity in relation to flare device i, worked out:
 (a) if, under section 34, the project proponent has chosen to use historical sampling data in relation to the reporting period—using that data; or
 (b) otherwise—in accordance with the monitoring requirements.
y means a component gas that is present in the re‑routed gas quantity in relation to flare device i, identified:
 (a) if, under section 34, the project proponent has chosen to use historical sampling data in relation to the reporting period—using that data; or
 (b) otherwise—as a result of monitoring parameters s and molar fraction in accordance with the monitoring requirements.
moly,i% means the molar fraction of component y in the re‑routed gas quantity in relation to flare device i, in mol%, worked out:
 (a) if, under section 34, the project proponent has chosen to use historical sampling data in relation to the reporting period—using that data; or
 (b) otherwise—in accordance with the monitoring requirements.
mwy means the molecular weight of component y, in kilograms per kilomole, as set out in the table in subsection 2.22(3) of the NGER (Measurement) Determination.
V means the volume of 1 kilomole of a gas at standard conditions, which is 23.6444 cubic metres.
Note: Equation 7 provides for the density of a re‑routed gas quantity (dTOTAL,i) to be worked out by reference to all components (y) in the gas quantity. This means that, in equation 3, the entire quantity of gas flared (QR,i) can be used to work out the emissions from flaring (EF,i).

Division 4—Method for calculating sampling discount factor