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Quality Assurance Program for Taiwan Ambient Air Monitoring Network

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This project was conducted from November 26th 2020 to November 25th 2022. The main objective of this project is aiming at non-routine inspection and auditing on all current Environmental Protection Administration’s Air Quality Monitoring Stations to ensure the quality control/quality assurance (QC/QA) programs were followed. The task mainly included: (1) auditing the monitoring instruments for 176 stations and performing the repeat auditions of monitoring instruments for 34 stations (2) performing the monitoring instruments functional check for 1408 stations , (3) conducting 34 ultra-low concentration checks . The performance audit used independent instruments and standards to inspect the deviation between the monitoring value and the standard value (accuracy). 176 stations were completed in two years, and out of the total of 3196 items audited, 79 items did not meet the QC/QA specifications. The acceptance rate was 96.8%, the acceptance rates of recent six years were 97.0%、96.7%、95.4%、96.6%、97.0% and 97.5%, respectively. The results of the performance audit demonstrated the quality of monitoring stations slightly decreased. The purpose of the functional check was mainly to focus on non-routine surveys and assessments on stations house maintenance, facility equipments, the document recording, the monitor operation conditions, the monitoring data check and the monitoring instruments accuracy inspection. Total of 1408functional checks were performed in two years and a total of 203254 items were conducted. Among all checked items, 798 items were found defective. The results of the functional check demonstrated the defective rate to be 0.39%. The defective rate of recent six years were 0.65%、0.66%、0.55%、0.36%、0.38% and 0.39%, respectively, which are all less than the specification of 0.7%, This result shows high quality in sustaining operation and maintenance of monitoring stations. All defects from the performance audit and functional check will be required to recheck between three days to seven days, The EPA and this project will track the results of defects improvement.
Keyword
Air Quality Monitoring Station, Quality Assurance, Performance Audit
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