The major accomplishments of this project were as follows: (1) A total of 56 field examinations were conducted to check whether the participating factories conform to regulations on dioxin emission; (2) A total of 113 declarations of dioxin emission sources were examined and filed. Moreover, field supervision was conducted on 30 factories for routine audits, improvements, and operation permit applications were filed; (3) A total of 21 dioxin emission stacks were inspected; (4) The PM2.5 contents of the emission stacks of 10 factories were assessed; (5) Odorous pollution sources were localized, and air pollution species data were established in Haihu Kengkou Industrial Park of Luzhu District; (6) 2 seasons of dioxin pollution source agglomeration area and Environmental Protection Administration Taoyuan Nonggong Observation Station monitored the ambient air dioxin concentration monitoring; (7) Environmental Protection Administration Air Quality Observation Station – Pingchen conducted the ambient air PM2.5 monitoring and data analysis; (8) The following environmental pollution cases were investigated: the raw material ingredients in the pollution source processing of BoardTek Electronics, Ho Chun Fiber, and Shang Chia Corp.; the amount of assisting and conforming air pollution to be paid; the odorous monitoring in American Science ＆ Technology, Tai-Tong Dying ＆ Finishing, and Yuhong Scientific Company of Dayuan District; the heavy metal emission performance survey of discharging pipe of Shuimei Engineering Company; after-calamity pollutant spread survey of fire accident of Federal Corporation ; and the ambient atmosphere HAP concentration monitoring, totally 28 cases supporting the environmental pollution survey and detection.
We reviewed 113 inspection reports, inspection plans, and other related documents declared as dioxin emission sources listed in Taoyuan; we conducted field supervision and inspected 30 registered emission sources of dioxin. During sampling, we monitored and verified whether the feed rates of factories and the operation of pollution-prevention equipment conformed to the regulations and operation standards for the entire course.
We conducted 56 on-site examinations this project (including re-examination). The feed rates of dioxin emission sources, operations of incineration facilities, operating conditions of pollution-prevention equipment, and conditions of sampling facilities were validated. The operating parameters were inspected by scientific instruments, to avoid the pollution source value counterfeit, and effectively control the preventive equipment status of each factory, We established databases according to the condition of conformity and provided necessary assistance to factories that failed to conform to regulations. Follow ups were conducted to ensure the completion of improvement measures.
We inspected 21 registered emission sources of dioxin. Among these factories, three failed to conform to emission standards. They included the sawdust or timber fuel boiler and the second-level copper smelting (including copper-sludge processing). These factories were identified by EPB and were required to implement improvement measures within a specified time. After improvements, the inspected emission concentration should conform to the standards.
The amount of dioxin emission in 2016 was estimated to be 4.098 g-TEQ. This amount is approximately 1/13 of the annual national dioxin emission estimated by the Environmental Protection Administration in 2015 (53.3 g-TEQ/year).
We completed two seasons of ambient air dioxin detection, and the sampling points were Shuimei Engineering Office Building, Shulin Primary School of Guanyin District, and Taoyuan Nonggong observation station; in summer, the average concentration of 3 sampling points was 0.026 pg TEQ/Nm3, in the scope of 0.016~ 0.042 pg TEQ/Nm3; in winter, the average concentration of 3 sampling points was 0.087 pg TEQ/Nm3, in the scope of 0.046~ 0.145 pg TEQ/Nm3; although the tested value in winter was 2 ~ 3 times higher than in summer, the tested values in 3 sampling points were all lower than Japanese ambient air dioxin environmental quality criteria annual average value of 0.6 pg-TEQ/Nm3.
The odorous pollution source verification in Haihu Primary School acquired higher concentration of vinyl chloride (VCM), which was from the northeast of Haihu Primary School; through comparing the data of stationary pollution source management system, we found Ocean Plastics Co., Ltd. Taoyuan Factory M01 processing – polyvinyl chloride plastics manufacturing process adopted VCM as the raw material, with the annual usage amount about 183461.76 tons, and we inspected the equipment of the factory and found there was the component leakage and the sewage plant without capping, and thus reported the violation items and required to improve within limited time; the acetone and methylbenzene were from the southwest of Haihu Primary School; through comparing the data of stationary pollution source management system, we found Li Shin Chemical Co., Ltd. processing – other chemical products manufacturing industry adopted the acetone and methylbenzene as the raw material, and issued punishment of not effectively collecting the pollutant; at present the two cases are under improvement, and we shall supervise and confirm the improvement effect continuously.
We also investigated the PM2.5 emission features of three kinds of pollutant sources during processing. These sources were gas fired boilers, incinerator boilers, and oil burning boilers, in which the oil burning boilers are divided into the types of different oils and with or without preventive equipment. According to the emission result of FPM2.5 and CPM2.5, the emission concentration of gas fired boiler was relatively low and stable. The emission concentration of most samples was composed mainly of FPM; through the oil burning boilers PM2.5 emission survey, FPM concentration of heavy oil boiler without preventive equipment = heavy oil boiler with preventive equipment > diesel oil boiler, CPM concentration of heavy oil boiler without preventive equipment > heavy oil boiler with preventive equipment > diesel oil boiler, which shows the oil burning boiler with preventive equipment has certain removal capacity to PM2.5.
We manually sampled and analyzed the PM2.5 ingredients in the air in Pingchen observation station by Harvard sampling instrument and online gas and aerosol ingredient monitor; from the data analysis, it is known that PM2.5 major ingredients in Pingchen observation station are NO3-, SO42-, NH4+, NH3, HCOOH, K, Na, and Zn, and from the relevance analysis chart it is known that PM2.5 has higher relevance with NO3-, NH4+, SO42-, NOx, Pb, and Na; the above pollutants are mainly discharged from mobile pollution sources according to the domestic research data, thus Pingchen observation station is mainly influenced by mobile pollution sources.
We assisted to analyze the wind speed and direction data from 12 o’clock to 23 o’clock on January 17 in Jhongli and Pingchen observation station of Environmental Protection Administration, the public petition and news data after the fire accident of Federal Corporation of Jhongli District, and selected 3 sensitive receivers as the sampling point of after-calamity monitoring, respectively Culture Primary School, Jhongli Junior High School and Chung Yuan Christian University, and the test result was that the ambient air dioxin concentration was 0.027~0.041 pg I-TEQ/m3, which was close to the dioxin monitoring concentration scope of northern metropolitan district (New Taipei, Taipei, Keelung, Taoyuan and Hsinchu) or six cities in recent five years, thus we assess there is no abnormal condition in the dioxin concentration of ambient air after the fire accident of Federal.
