Indiana Administrative Code › Title 326 - AIR POLLUTION CONTROL DIVISION › Article 3 - MONITORING REQUIREMENTS › Rule 4 - General Provisions › Section 4-3 - Conversion factors

Current through July 10, 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:
(1) The owner or operator of a
				fossil fuel-fired steam generator shall use the following procedures to convert
				gaseous emission monitoring data in parts per million (ppm) to pounds per
				million British thermal units (Btu) (lbs/MMBtu) where necessary:
(A) When the owner or operator of a fossil
				fuel-fired steam generator elects under this article to measure oxygen
				(O2) in flue gases, the owner or operator shall measure
				the pollutant concentration and oxygen on a dry basis and use the following
				conversion procedure:
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(B) When
				the owner or operator elects under this article to measure carbon dioxide
				(CO2) in flue gases, the owner or operator shall measure
				the pollutant concentration and the CO2 concentration on
				a consistent basis (wet or dry) and use the following conversion procedure:
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(C) When
				the owner or operator elects under this article to measure sulfur dioxide
				(SO2) or nitrogen oxides (NOx) in
				the flue gases, the owner or operator shall measure the diluent concentration
				and the SO2 or the NOx
				concentration on a wet basis and use the following conversion procedure, except
				where wet scrubbers are employed or where moisture is otherwise added to the
				stack gases:
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(D) When
				the owner or operator elects under this article to measure
				SO2 or NOx in the flue gases, the
				owner or operator shall measure the diluent concentration and the
				SO2 or the NOx concentration on a
				wet basis and use the following conversion procedure, where wet scrubbers or
				moisture is otherwise present in the stack gases, provided water vapor content
				of the stack gas is measured at least once every fifteen (15) minutes at the
				same point as the pollutant and oxygen measurements are made:
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(E) The
				values used in the equations under this subdivision are derived as follows:
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.