| 英文摘要 |
I.Plan Name：The Project of Chiayi City for Strengthening Street Dust Cleaning in 2019.
II.Implement Company：Shin Shin Environmental Protection Engineering CO., LTD.
III.Principal investigator：CHEN,MU-LIANG
IV.Plan Time： January 31,2019 to December 15, 2019
V. The work content completes the progress：
(I)The cleaning operation began on March 12, 2019 and, based on the statistics until December 15, 2019, the street washing operation reached 15,035.1kilometers with the length of street sweeping operation of 8,004.7kilometers as well as the cleaning execution length of 23,039.8 kilometers. The cumulative achievement rate was 95%
(II)Estimation of the street cleaning benefits in pollution reduction:
The total length of the sweeping street in this period was 23,039.8 kilometers. According to the EPA's reduction formula (reduction amount = length of sweeping street × reduction factor), total suspended particle (TSP) can be reduced to 317.94 metric tons, 59.90 metric tons of PM10 and 13.98 metric tons of PM2.5. In addition, according to the 2019 Air Pollution Control Plan of Chiayi City, the control category of the project is classified as “fugitive emission source”, which adopts a control strategy of “Strengthening Street Dust Cleaning Operation” with the reduction planning method of “Execution Street Cleaning Operation” (including the cleaning team work of the bureau). It is scheduled to perform a total cleaning length of 80,000 km, which is expected to reduce TSP 1,104.0 metric tons, PM10 208.0 metric tons and PM2.5 48.6 metric tons. The implementation of this project long with the EPA cleaning team (until December 15 statistically) with the results of a total of 80,219.3 km of washing length, is expected to reduce TSP 1,107.03 metric tons, PM10 208.57 metric tons and PM2.5 48.69 metric tons, having reached 100% of estimated objective.
(III)Census of road fouling condition:
In order to strengthen the mastery and improvement of the road dirt level in Chiayi City to serve as a reference for regular planning of the street sweep route, the project had conducted a comprehensive road census on Chiayi City's roads and streets sweeping operation every month. Road census work began in February, and a totaled 371 time/road had been surveyed by the end of December . The total number of kilometers in the census reached 871.9 kilometers. The results of the census accounted for more than 91% of Class A roads in December and 9% of Class B roads. The 25 cases (roads) were reported to have improved.
(IV)Inspection to the field operation of street sweeping:
The road inspection was carried out three a week. The statistics of this year were up to December . Investigation to the street washing operation had been conducted for 64 times and the street sweeping operation for 56 times, and the total inspection length has reached 779.4 km.
(V)Completed 10 roads for street dust load detection 20 times before and after the street flushing. Before the street flushing, the average silt load was 0.17g/m2 and street dust load 0.88g/m2; the average road class was classified as Class A-B according to the street dust load control target of EPA. After the street flushing, on the other hand, the average silt load dropped to 0.08g/m2 and street dust load 0.38g/m2; therefore the average road class was improved to Class A.
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