40 C.F.R. § 60.3042

How do I convert my 1-hour arithmetic averages into the appropriate averaging times and units?

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(a) Use Equation 1 in § 60.3076 to calculate emissions at 7 percent oxygen.

(b) Use Equation 2 in § 60.3076 to calculate the 12-hour rolling averages for concentrations of carbon monoxide.