Any emissions monitoring or stack testing being carried out must measure all necessary parameters (e.g. oxygen, moisture, temperature) to allow the required corrections to be applied. This could be used to compare measured data obtained through undertaking stack testing (at actual values of temperature, pressure, moisture and oxygen) to guideline values which are normalised to reference conditions for compliance purposes.
Concentration metrics can be corrected for moisture and oxygen content to obtain the correct emissions data within the appropriate reference conditions. Typically emissions of stack gasses are expressed on a dry gas basis so that variations in the moisture content of the stack gas do not affect the assessment of the emissions. The oxygen reference value for expressing emission concentration limits depends on the type of process equipment under consideration and the requirement to compare engineering data with guideline limits to assess compliance.
This stack gas concentration measurement correction calculator tool can be used to compare measured values with guideline values by applying all the necessary corrections necessary for fair comparison, as well as convert measurements taken in-situ in ppm to corresponding mg/m3 at the associated reference conditions and vice versa.
See the Environmental Protection Agency of Ireland‘s site for more information on the calculation methods applied in this stack gas concentration measurement correction calculator. See out tools room for more air quality tools.