Document ID: chunk:federal_register_of_legislation:F2024C00833:reg:4:p4
Version: federal_register_of_legislation:F2024C00833
Segment Type: reg
Provision Reference: reg 4 (pt 4/13)
Character Range: 116522–119168

for re‑calibration against a certified reference gas.

Part 1.3—Method 4—Direct measurement of emissions

Division 1.3.1—Preliminary

1.20  Overview
 (1) This Chapter provides for method 4 for a source.
Note: Method 4 as provided for in this Part applies to a source as indicated in the Chapter, Part, Division or Subdivision dealing with the source.
 (2) Method 4 requires the direct measurement of emissions released from the source from the operation of a facility during a year by monitoring the gas stream at a site within part of the area (for example, a duct or stack) occupied for the operation of the facility.
 (3) Method 4 consists of the following:
 (a) method 4 (CEM) as specified in section 1.21 that requires the measurement of emissions using continuous emissions monitoring (CEM);
 (b) method 4 (PEM) as specified in section 1.27 that requires the measurement of emissions using periodic emissions monitoring (PEM).

Division 1.3.2—Operation of method 4 (CEM)

Subdivision 1.3.2.1—Method 4 (CEM)

1.21  Method 4 (CEM)—estimation of emissions
 (1) To obtain an estimate of the mass of emissions of a gas type (j), being methane, carbon dioxide or nitrous oxide, released at the time of measurement at a monitoring site within the area occupied for the operation of a facility, the following formula must be applied:

where:
Mjct is the mass of emissions in tonnes of gas type (j) released per second.
MMj is the molecular mass of gas type (j) measured in tonnes per kilomole which:
 (a) for methane is 16.0410‑3; or
 (b) for carbon dioxide is 44.0110‑3; or
 (c) for nitrous oxide is 44.0110‑3.
Pct is the pressure of the gas stream in kilopascals at the time of measurement.
FRct is the flow rate of the gas stream in cubic metres per second at the time of measurement.
Cjct is the proportion of gas type (j) in the volume of the gas stream at the time of measurement.
Tct is the temperature, in degrees kelvin, of the gas at the time of measurement.
 (2) The mass of emissions estimated under subsection (1) must be converted into CO2‑e tonnes.
 (3) Data on estimates of the mass emissions rates obtained under subsection (1) during an hour must be converted into a representative and unbiased estimate of mass emissions for that hour.
 (4) The estimate of emissions of gas type (j) during a year is the sum of the estimates for each hour of the year worked out under subsection (3).
 (5) If method 1 is available for the source, the total mass of emissions for a gas from the source for the year calculated under this section must be reconciled against an estimate for that gas from the facility for the same period calculated