The operator shall monitor emissions of N₂O from nitric acid production using continuous emissions measurement. The operator shall monitor emissions of N₂O from adipic acid, caprolactam, glyoxal and glyoxylic acid production using a measurement-based methodology for abated emissions and a calculation-based method (based on a mass balance methodology) for temporary occurrences of unabated emissions.

For each emission source where continuous emissions measurement is applied, the operator shall consider the total annual emissions to be the sum of all hourly emissions using the following formula:

N₂O emissions_annual [t] = Σ [N₂O conc_hourly [mg/Nm³] * flue gas flow_hourly [Nm³/h]] * 10^–9

Where:

N₂O emissions_annual

total annual emissions of N₂O from the emission source in tonnes N₂O

N₂O conc_hourly

hourly concentrations of N₂O in mg/Nm³ in the flue gas flow measured during operation

Flue gas flow

flue gas flow determined in Nm³/h for each hourly concentration