The plan includes: (1) on-site inspections and filing of operation regulation compliance of 37 Dioxin emission source factories; (2) inspections and filing of declared data and test reports for 131 Dioxin emission sources and supervision of inspections, regular intervals, improvements, and applications for operation licenses for 11 factories; (3) Dioxin inspections of eight drain pipes; (4) inspections of heavy metal emission characteristics of five key industrial pipes; (5) monitoring of hazardous air pollutants in the ambient air at specific industrial areas over nine months; (6) investigations into the status of atmospheric Dioxin in three areas with intensive pollution sources across four seasons; (7) drainage investigations and detection of organic pollutants in harmful pollutants of 20 drain pipes, and inspection and detection of organic pollutants in harmful pollutants of six drain pipes; (8) inspections of the PM2.5 emission characteristics of three key industrial pipes; (9) assisting in the analysis of pollutant monitoring during fire disasters in the Meifu warehouse and Carrefour warehouse; (10) amendments to on-site response standard operating procedures for air pollution incidents, maintenance of and updates to the emergency response system for disastrous air pollution incidents, and maintenance of the delivery and review system for emergency response measures in air pollution emergencies, as well as inspections of the system and database; (11) handling environmental education training and regulation training seminars and meetings; (12) correlation analysis of hazardous air pollutant emissions and health risks based on the service proposal plan.
In this plan, a total of 37 Dioxin emission sources were investigated. Scientific instruments were used to check the operational parameters of Dioxin emission sources, such as the feeding quantity, incineration equipment operation, pollution prevention, control equipment operation, and sampling of facility conditions, to effectively control the operation status of control equipment in each plant. There were nine stationary pollution sources whose operation status did not meet the operation permit threshold, for which improvements and follow-ups post-improvement are required.
The plan reviewed 131 test reports, test plans, and other relevant data declared by Dioxin sources in Taoyuan City, and conducted on-site monitoring of 17 managed Dioxin sources. Three pollution sources were asked to conduct re-sampling due to equipment damage or process failure during the inspection.
The inspection and detection of Dioxin discharge sources in eight pipes was carried out, and one boiler using SRF and waste rubber as a fuel did not meet the "Small and Medium-Sized Waste Incinerator Dioxin Control and Emission Standards" – the discharge limit of Dioxin with a designed capacity of 4 metric tons/hour or more.
The annual Dioxin emissions of all Dioxin emission sources in 2022 were estimated to be 0.032 g-TEQ/year from large incinerators, 0.013 g-TEQ/year from medium incinerators, 0.042 g-TEQ/year from small incinerators, 1.50 g-TEQ/year from electric arc furnaces, 0.007 g-TEQ/year from auxiliary fuel – waste liquid, 0.408 g-TEQ/year from auxiliary fuel – sludge, 0.069 g-TEQ/year from auxiliary fuel – saw dust, 0.017 g-TEQ/year from auxiliary fuel – coal – water slurry, 0.120 g-TEQ/year from boiler power generation or steam power co-combustion boilers, 0.0007 g-TEQ/year from crematories, 0.180 g-TEQ/year from secondary copper smelting, 0.016 g-TEQ/year from aluminum and other metal secondary smelting, and 0.017 g-TEQ/year from other processing industries. Total emissions in 2022 was 2.423 g-TEQ/year, accounting for about 1/20 of the national Dioxin annual emissions (47.7 g-TEQ/year) in 2020 estimated by the EPA.
This plan completed the Dioxin detection and investigation of environmental air at the leeward side of a special industrial area, the Taoyuan City Environmental Science and Technology Park, over nine months, spanning five areas with heavy Dioxin pollution sources – Yong-an Elementary School in Xinwu District, Shu-Lin Elementary School in Guanyin, and Chao-Inn Elementary School in Dajun District across four seasons. The concentrations of Dioxin in the ambient air ranged from 0.014 to 0.792 pg TEQ/Nm3, and the average value was 0.146 pg-TEQ/m3, which is higher than the EPA's monitoring value of 23 air quality stations (the concentration range is N.D.~0.120 pg-TEQ/m3, and the average value is 0.022 pg-TEQ/m3), but lower than the ambient quality base annual average of ambient Dioxin of 0.6 pg-TEQ /Nm3 in Japan.
The monitoring results of hazardous air pollutants such as heavy metals and volatile organic compounds in the perimeter air of the Taoyuan Environmental Science and Technology Park met the perimeter standards of the "Stationary Pollution Source Hazardous Air Pollutant Emissions Standards", and also complies with the standard values set by the World Health Organization (WHO), the European Commission (EC), the Japanese Ministry of Environment, the Texas Commission on Environmental Quality (TCEQ) and other authorities. Only hydrochloric acid and ammonia were detected in the air, and the monitoring results were all lower than the boundary standard values in the "Standards for Air Pollutant Emissions from Stationary Pollution Sources".
This year, boilers using SRF as fuel were investigated. The mass concentration of PM2.5 at the Yangmei Factory of Yuen Foong Yu Consumer Products Co., Ltd. (YFYCPG) was 7.85 mg/Nm3, mainly CPM, the main components being sulfate, sodium ion, and chloride salt; the mass concentration of PM2.5 at P401 of TA-YUAN COGEN CO., LTD. was 20.7 mg/Nm3, mainly CPM, the main components being sulfate, sodium ion, and chloride salt. The urea was sprayed in both factories to reduce nitrogen oxide. As a result, the exhaust gas contained sulfate, ammonium ions, and other compounds, which formed aerosols such as ammonium sulfate in the atmosphere after discharge.
The FTIR of Haihu National Primary School detected 10 kinds of pollutants: ammonia gas, cyclohexane, dichloromethane, ethanol, ethyl acetate, isopropyl alcohol, methane, methanol, n-butane, and vinyl chloride. During the monitoring period, the value of ethyl acetate exceeded the perimeter standard and factory threshold. The high value of vinyl chloride appeared from 08:00 to 09:00 on 10 February 2022. The maximum concentration monitored for 5 minutes was ND to 116 ppb, and the average hourly concentration was 17.7 ppb, which did not exceed the perimeter standard of 20 ppb.
The air pollution emergency response measures declaration system of controlled factories has been established and is routinely maintained. The factory could fill in or upload all data online directly, following which it translates into a proposed measure for online review, which is convenient for establishing an electronic data file of all manufacturer data. This system can be used to quickly review the air pollution emergency response measure proposal when the EPD adds a new chemical-controlled factory.
It selected the Top 100 sources of VOC emissions and stationary pollution sources that use the pipe materials listed in the "Stationary Pollution Source Hazardous Air Pollutant Emissions Standards", and conducted an investigation of the organic matter emission status in 20 drain pipes of nine plants, and inspected and detected six drain pipes of six plants. The toluene emission concentration of P205 of the Achem Technology Yangmei Factory No. 2 and the P101, P102 and P103 of the Tong Yang Group Guanyin factory did not conform to the "Stationary Pollution Source Hazardous Air Pollutant Emissions Standards". In the future, it will cooperate with Taiman Company to provide guidance on reducing emissions. For the stationary pollution sources whose control equipment is a scrubber or absorption and desorption device, and no risk management plan has been submitted, the inspection and detection of harmful organic pollutants covered six drain pipes thus; all results meet emission standards.
