Guideline on data handling conventions for the PM NAAQS

Abstract

This guidance provides information the person, the state or local agency responsible for monitoring and interpreting air quality, needs to determine whether the standards for particulate matter in 40 CFR Part 50 are being met. It clarifies requirements for data handling and completeness in Appendix N to 40 CFR Part 50. It tells how to handle missing data, different sampling frequencies, and calculating spatial averages for the PM-2.5 annual standard.