According to the contract, this project had completed including maintenance of the manual operation air monitoring stations and sampling of the manual operation monitoring station from Feb. 1, 2019 to Jan. 31, 2020. Also executed air monitoring stations and gas comparison of volatile organic compounds (VOCs) cylinders by third-part function checking system at one time during the compliance period. All the maintenance is performed regularly according to the contract, and the final report as submitted as scheduled. The availability rate of each instrument's data was over 90% each month. According to the YanJou air monitoring stations monitoring results, the SO2、NO2、O3、CO、PM10 concentration did not exceed the air quality standards during the implementation. The top five species of volatile organic compound concentration in each month include toluene, propane, ethane, n-butane, ethylene, m-p-xylene, acetylene, cumene and isopentane, etc. There were 115 days perform with poor air quality (AQI>100) in the YanJou air monitoring stations from Feb. 1, 2019 to Jan. 31, 2020. And the Suspended Particulates (PM2.5) exceeding the 24-hour average standard (35 µg/m3)accounted for 74 days from Feb. 1, 2019 to Jan. 31, 2020.

air monitoring stations, sampling of the manual operation monitoring station