| 英文摘要 |
This plan has been mainly executed the maintenance service of Tainan Air Quality Monitoring Display System to make sure the normal operation and the data quality of equipment, and it also aggregated log sheets of entire service and suggestions of improvement were provided to the Tainan Environmental Protection Bureau (EPB) to control the service status. Further to this, it offered revised standard of operational procedure and the maintenance test to guarantee the maintenance quality and meet the inspection monitoring station assessment criteria from Environmental Protection Administration (EPA).
Plan of Timeframe：From 14 July, 2015 to 13 July, 2016
The achievement of this project was stated below:
First, the manual monitoring station
(1) Operation ＆ maintenance in monitoring station
It had to conduct the first half and second half monthly regular service and maintenance works.
(2) Calibration Process
In addition to conduct calibration process for single point check of equipment every month, our team also took calibration device to consultative quality assurance laboratory of Envimac Technology ＆ Consultants Corporation to perform a Class I traceable correction. Multi-spot calibration were performed on 2015/07, 2015/10, 2016/01 and 2016/04, and all of the results were reached the program requirement.
(3) Sampling and inspection & analysis
Total suspended particles (TSP) analysis was performed twice a month, and PM10, PM2.5, dust contents were sampled once a month. This plan completed 12 manual stations for the accuracy quarterly tests and did 12 times of parallel calibration work, and all error percentages were within 10% based on requirement.
Second, the automatic monitoring station
(1) Operation & maintenance in Monitoring Statoin
Regular maintenance included weekly maintenance, monthly maintenance, quarterly maintenance and yearly maintenance, and all works did base on the plan schedule. Also, maintenance sheets of last month were submitted before 10th of each month. All data acquisition rate during the implementation of the project were more than 90% of the contract provisions.
(2) Calibration process
All analyzers were conducted a daily zero-span check, and multi-spot flow calibration were performed quarterly maintenance. The correlation coefficient of each multi-spot calibration was above 0.995, the slop was between 0.88 ~ 1.12, and the intercept was between ±2% F.S. All calibration results in this plan met the regulation.
Third, Monitoring results
(1) Manual monitoring station
TSP monitoring results from July 2015 to July 2016 were in compliance with air quality standard as 24 hourly value (250 g/m3). It was shown that the trend was probably consistent of TSP monitoring results during last 5 years, and the trend was that the concentration was higher in winter and lower in summer. The highest monthly average was 113 μg /m3 on November 2015, and the lowest monthly average was 28 μg /m3 on July 2016. In TSP, sulphate accounted for the highest proportion, followed by nitrate, chloride, and lead accounted for the lowest contents.
The concentration of dust contents between each manual monitoring station was insignificant. Dust contents contamination was classified into five classes: Very slight contamination (96.15%), minor contamination (1.92%), moderately polluted (0.64%), serious contamination (0.64%), very serious contamination (0.64%). The highest monthly average was 4.40 tons/ km / month on December 2015, and the lowest monthly average was 0.52 tons/ km / month on June 2016.
The variation of PM10 and PM2.5 was due to the seasonal change, and the concentration was higher in winter and lower in summer. Changing of PM10 and PM2.5 over the years was little. The highest monthly average of PM10 was 104 μg /m3 on December 2015, and the lowest one was 19 μg /m3 on June 2016. The highest monthly average of PM2.5 was 68 μg /m3 on December 2015, and the lowest one of PM2.5 was 11 μg /m3 on June 2016.
(2) Automatic monitoring station
In Tainan, the data of six automatic monitoring stations aggregated from July 2105 to July 2016. The automatic monitoring stations included Cheng-xi and Nancy stations which belong to EPB and Sinying, Shanhau, Annan, Tainan stations which belong to EPA. The variation of PM10 was due to the seasonal change, and the concentration was higher in winter and lower in summer. The tendency of seasonal variation was similar between 6 auto monitoring stations in Tainan.
PSI index was compared with PM10 and O3 excessive frequency, and it was shown that The Sinying station and Shanhau station were mainly influenced by PM10. The Annan station and Tainan station were mainly influenced by both PM10 and O3. PM10 concentration was higher in winter and spring, while O3 concentration was higher in spring and autumn. In autumn, the air quality will be influenced by both PM10 and O3, so more attention should be paid in this period.
Fourth, Xiaosimeng information electronic monitoring system
(1) Maintenance and inspection
18 inspections and 4 quarterly maintenance were conducted from July 2015 to July 2016.
(2) Update of the display board
During plan period, the monitoring system was displayed with 308 times, in which a total of 66 times of EPB.
Fifth, Assessment of point setup of traffic stations
(1) Simulated results
The pollutant concentration infusion has been simulated by ISESCT 3, and the suitable point setup of traffic stations then further been chosen.
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