Review and Update of the Data Validation Procedures for the PM_(2.5) Chemical Speciation Network

摘要

A comprehensive system of QA/QC checks covering all stages of the process has enabled high data quality for the past 14 years. While we flag and invalidate certain extreme outliers if evidence is available, the monitoring agencies will need to review the data on a periodic basis to ensure erroneous outliers are flagged or invalidated appropriately.