Indiana Administrative Code
Title 326 - AIR POLLUTION CONTROL DIVISION
Article 3 - MONITORING REQUIREMENTS
Rule 4 - General Provisions
Section 4-3 - Conversion factors
Current through March 20, 2024
Authority: IC 13-14-8; IC 13-17-3-4; IC 13-17-3-11
Affected: IC 13-15; IC 13-17
Sec. 3.
(a) Owners or operators of emissions units subject to this article shall use the following procedures for converting monitoring data to units of the standard where necessary:
Cws = Pollutant concentration at stack conditions in grams per wet standard cubic meter (g/wscm) or pounds per wet standard cubic meter (lbs/wscm), determined by multiplying the average concentration in parts per million (ppm) for each one (1) hour period by 4.15 × 10-5 M g/wscm per ppm or 2.59 × 10-9 M lbs/wscm per ppm, where M is pollutant molecular weight in grams per gram-mole (g/g-mole) or pounds per pound-mole (lb/lb-mole).
M = 64.07 for SO2 and 46.01 for oxides of nitrogen (NOx) as NO2.
C = Pollutant concentration at stack conditions in pounds per dry standard cubic meter (lbs/dscm) or grams per dry standard cubic meter (g/dscm).
F, Fc = A factor representing a ratio of the volume of dry flue gases generated to the calorific value of the fuel combusted (F), and a factor representing a ratio of the volume of carbon dioxide generated to the calorific value of the fuel combusted (Fc), respectively. Values of F and Fc are given in 40 CFR 60, Appendix A, Method 19*, as applicable.
Fw = A factor representing a ratio of the volume of wet flue gases generated to the calorific value of the fuel combusted. Values of Fw are given in 40 CFR 60, Appendix A, Method 19*.
Bwa = Proportion by volume of water vapor in the ambient air.
Bws = Proportion by volume of water vapor in the stack gas.
E = Pollutant emission, lbs/MMBtu.
Percent O2,
percent CO2 = Oxygen or carbon dioxide volume (expressed as percent) determined with equipment specified under this article.
Percent O2ws = Oxygen volume (expressed as percent) measurements made at stack conditions on a wet basis.
(b) The department may approve alternate procedures for computing emission averages that do not require integration of data or alternative methods of converting pollutant concentration measurements to units of the emission standard if the owner or operator shows that the alternate procedures are at least as accurate as those in this rule.
*These documents are incorporated by reference. Copies may be obtained from the Government Printing Office, 732 North Capitol Street NW, Washington, D.C. 20401 or are available for review and copying at the Indiana Department of Environmental Management, Office of Air Quality, Indiana Government Center North, Tenth Floor, 100 North Senate Avenue, Indianapolis, Indiana 46204.