Appendix A Gas RATA Observation Sheet
c. NOx lbs/mmBtu Calculation
O2 Diluent - When the NOx continuous emission monitoring system uses O2 as the diluent, and measurements are performed on a dry basis, use the following conversion procedure
When measurements are performed on a wet basis, use the equations in method 19 in appendix A of part 60.
CO2 Diluent - When the NOx continuous emission monitoring system uses CO2 as the diluent, use the following conversion procedure:
When CO2 and NOx measurements are performed on a different moisture basis, use the equations in method 19 in appendix A of part 60.
E = Pollutant emissions during unit operation, lb/mmBtu
K = 1.194 10‑7 (lb/dscf)/ppm NOx.
Ch = Hourly average pollutant concentration during unit operation, ppm.
%O2, %CO2 = Oxygen or carbon dioxide volume during unit operation (expressed as percent O2 or CO2).
F, Fc = a factor representing a ratio of the volume of dry flue gases generated to the caloric value of the fuel combusted (F), and a factor representing a ratio of the volume of CO2 generated to the calorific value of the fuel combusted (Fc), respectively.
F‑ AND FC‑FACTORS1
Coal (as defined by ASTM D388-92):
Bituminous and subbituminous
1 Determined at standard conditions: 20 C (68 F) and 29.92 inches of mercury.
6. Relative Accuracy Calculations
Part 75 Field Audit Manual - July 16, 2003 Page A-19