| 英文摘要 |
The project's monitoring vehicle has been in operation since November 2020, covering a total of 100 monitoring items, including 87 volatile organic compounds (VOCs) covered by NIEA A715, 7 general air quality measurements, 2 odor measurements, and 4 meteorological data items. The project goals included maintaining the GC/MS monitoring vehicle and instruments properly, conducting the routine quality assurance and control during the monitoring period, and reaching the data availability rate more than 90%.
Refer to the regulation of quality assurance by Ministry of the Environment, the performance audit was held by third-party auditors and experts, and the results meet the goals in data quality.
The project period is from March 27 to December 31, 2023. The main monitoring target is the Yunlin Offshore Industrial Park, and according to the meteorological conditions such as windward and leeward, we carried out the regular monitoring at Nanmen Haifeng Dormitory and the 4th Coastal Patrol 42nd Squadron in Mailiao.
The monitoring results of Nanmen Haifeng Dormitory showed that the eight-hour average of O₃ and the 24-hour average of PM₁₀ were higher than the air quality standards up to 32.73% and 0.59% of the total number of monitoring respectively. The average concentration of NH₃ was above the odor threshold also occurred up to 6.31% of the total number of monitoring. Only toluene, a volatile organic compound, was above the odor threshold up to 0.09% of the total number of monitoring.
The results of monitoring from 2022 to 2023 within the same period show that the average concentrations of NO₂, TRS, and NH₃ plummeted slightly, but propane, acetone, and toluene had edged up, especially propane which is mainly from the flare gas.
The monitoring results of the 4th Coastal Patrol 42nd Squadron showed that only the eight-hour average of O₃ was higher than the air quality standard up to 4.41% of the total number of monitoring. The average concentration of NH₃ was also higher than the odor threshold up to 2.04% of the total number of monitoring. Only styrene, a VOC, was above the odor threshold up to 7.91% of the total number of monitoring.
The results of monitoring from 2021 to 2023 within the same period show that the average concentrations of SO₂, NO₂, TRS, and NH₃ plummeted annually, and solvents such as acetone and methanol as well. But the average concentration of propane, pentane, and isopentane had edged up moderately.
We completed the fingerprint maps of the Yunlin Offshore Industrial Park and the Douliu Industrial Park and continued to collect monitoring data to knowing the pollutant characterization. Based on the above, we were proactive in entering the factory and found that the concentration of dichloromethane was higher during pipeline replacement in the annual repair period.
In addition, to follow up on improvements, we work with related project (such as the project of VOC inspection and hazardous air pollutants investigation plan in offshore industrial zones) and call the meeting regularly to discuss the results of monitoring.
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