corr = meas x (21 - X) /(21 - Y)
Where: corr = The concentration corrected for oxygen.
meas = The concentration uncorrected for oxygen.
X = The volumetric oxygen concentration in percentage to be corrected to eight (8)% for recovery furnaces and ten (10)% for lime kilns, incinerators, or other combustion devices.
Y = The measured twelve (12)-hour block average volumetric oxygen concentration; and
06- 096 C.M.R. ch. 124, § 5