This project executing period was from May 8th 2011 to May 7th 2012. The main purpose of this project is aiming at non-periodically inspecting and auditing all current Environmental Protection Administration’s Air Quality Monitoring Stations to guarantee the quality of monitoring network data. The work content mainly included (1) the execution of monitoring instruments performance audit 80 stations, (2) the execution of monitoring instruments functional check 486 stations, (3) submit the quarterly reports of monitoring data quality. The performance audit primarily inspected the deviation between the monitoring value and the standard value (accuracy), there were 80 stations completed in this year , audited items total was 1457, just 58 items does not meet the audit quality objectives, the degree of satisfaction was 96.0%, it’s the lowest satisfaction degree in recent five years. According to the monitoring instrument type, the highest satisfaction degree was 99.9% performed by gaseous monitoring instruments, the second one was 97.6% done by particle monitoring instruments and the lowest one was 92.8% done by dynamic dilution calibration system. To ensure the performance audit results closer to the monitoring data accuracy, new work items is ultra-low concentrations of checking, and zero air purity check in this project. Functional check was mainly to focus on non-periodically 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. There were totally 486 functional checks in this year ,checked items total was 68175, just finded 325 items missing, the whole result of functional check demonstrated the defect rate only 0.48%. Which presented declining trend year by year due to the high quality in sustaining operation and maintenance of monitoring stations. According to different kind of functional check result, the unqualified defects were shown in sequence. The highest defect rate was accuracy check 1.38%, the second was station & facility equipments 0.51%, meteorological instruments 0.38% is third, then malfunctioned monitors 0.33%, and finally document recording conditions 0.15%. In order to assessment the quality of monitoring data and maintenance management condition, total submitted 4 times quarterly reports of monitoring data quality, the report content included the results of quality assurance, the maintenance management conditions, the availability of monitoring data, and another related contents.

Air Quality Monitoring Station, Quality Assurance, Performance Audit