Where:
Cadj = pollutant concentration adjusted to zero percent oxygen, ppm or g/dscm;
Cmeas = pollutant concentration measured on a dry basis, ppm or g/dscm;
20.9c = 20.9 percent oxygen-0.0 percent oxygen (defined oxygen correction basis), percent;
20.9 = oxygen concentration in air, percent;
%O2 = oxygen concentration measured on a dry basis, percent.
40 C.F.R. §63.1568