Below are documents associated with the final rule and corrections to revise 40 CFR part 50, appendix D, Reference Measurement Principle and Calibration Procedure for the Measurement of Ozone in the Atmosphere.

Final Rule: Corrections to Reference Measurement Principle and Calibration Procedure for the Measurement of Ozone in the Atmosphere 

Fact Sheet - Final Rule to Revise 40 CFR Part 50, Appendix D, Reference Measurement Principle and Calibration Procedure for the Measurement of Ozone in the Atmosphere (pdf) (136.94 KB)

Federal Register Notice - 40 CFR Part 50, Appendix D, Reference Measurement Principle and Calibration Procedure for the Measurement of Ozone in the Atmosphere (Chemiluminescence Method) (pdf) (695.98 KB)