4 0 ton subway station fuel boiler oxygen

40 CFR Appendix F to Part 75 - Conversion Procedures | CFR ...

3.3.4.1 For boilers a minimum concentration of 5.0 percent CO 2 or a maximum concentration of 14.0 percent O 2 may be substituted for the measured diluent gas concentration value for any operating hour in which the hourly average CO 2 concentration is <5.0 percent CO 2 or the hourly average O 2 concentration is >14.0 percent O 2.

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