The project was launched for the implementation of organic hazardous air pollutants (HAPs) control from stationary air pollution sources. The scope of works include: 1. To establish the SOP for domestic HAPs identification so as to prioritize the HAPs for control; 2. To establish the methodology for nationwide HAPs investigation; 3. To study and collect suitable test methods for HAPs; 4. To establish the calculation methodology and emissions inventory for domestic HAPs; 5. To establish the SOP for domestic HAPs health risk assessment; 6. To propose the short, median and long term stationary sources HAPs control strategy and implementation plan.
Information regarding control and strategy planning in foreign countries were collected mainly for the promotion of technical mitigation strategy and hot spots control strategy. Which shows technical standards were applied first for the control of pollution sources with emissions over certain upper limit for the purpose of “achieving organic HAPs emissions reduction”. In the meantime, hot spot control was also promoted to mandate high risk pollution sources to enhance reduction. Health effects were added for the consideration of organic HAPs risk so as to lower public exposure to HAPs.
In respect of promoting control and establishing implementation protocol, the project suggested the draft to publicize “43 Organic HAPs” as priority, as well as 3 industrial processes for HAPs control. The current emission standards were reviewed to include HAPs control for analysis, the emissions inventories were updated and cross checked with toxics control databank, the name lists for further survey were built for total control of pollution sources. The two year has established domestic emission factors information from on-site investigation. Besides, the project also put together the rules for setting domestic monitoring stations and completed the evaluation for building domestic monitoring stations. The project invited expert with monitoring experiences (Dr. Philip M Fine) to Taiwan for a three days international workshop regarding HAPs control and monitoring technology.
Field investigation of organic HAPs flows for modeling analysis was conducted to establish “The SOP for domestic organic HAPs emissions investigation”. The project achieved 15 times of field investigation for organic HAPs emissions and modeling analysis. Accordingly, manuals for emissions investigation for 5 categories of industrial process were revised as well as a 3 days training workshop was conducted with 96 participants to cultivate talents for domestic investigation operation.
In the part of health risk assessment, the project completed the assessment of organic HAPs for priority control and the collection of dose response information, as well as completed the SOP for domestic exposure assessment and the establishment of the parameters for assessment. Accordingly, the project completed 15 times of field HAPs health risk assessment with analysis reports for 23 HAPs. In consideration of the assessment results and process characteristics, the project suggested the industrial processes for priority control as well as 10 HAPs for priority health risks control, which are Acrylonitrile, Formaldehyde, Tetrachloroethylene, Xylene, Methanol, 1,2-Dichloroethane, Ethylbenzene, Styrene, N,N-Dimethyl formamide and Benzene. The project has established the (draft) protocol for domestic stationary source HAPs health risk assessment, and through consultation with experts and scholars to complete the “Stationary Source HAPs Health Risk Assessment Protocol (draft)” for future application by relevant units.
According to the results from this year, the project suggests future work items as follows: (1) The promotion for HAPs control can not be implemented only by EPA. It also needs the IDB of MOEA to share the work together so as to promote the overall pollution reduction effectively from the origin of pollution sources. Therefore, it is suggested for the following year project to divide the work among different governmental departments while the EPA will do the integration; (2) It is suggested for future HAPs control to include VOCs, Dioxins, Heavy Metals and Acidic gases, for short term action plan in connection with traditional air pollutants control program, while actively revise the plan for median and long term goals; (3) It is suggested to apply foreign HAPs control technology and standard (T-BACT/MACT) for the control of priority HAPs listed by this project; (4) It is suggested to target the 13 HAPs that are put under the air pollution fee program for short term control operation and aggressively move on to the following control items, including overall control implementation operation and time table, emission reporting operation, periodic inspection operation, and the permitting administration, as well as establishing the management system for the 13 HAPs such as the application rules, application guidelines, review rules and operation procedure, and review guidelines, so as to promote the HAPs management system; (5) It is suggested to complete the “Stationary Source HAPs Health Risk Assessment Operation Regulation (draft)” aggressively so as to promote health risk oriented stationary source HAPs assessment and management system, which can be used to set criteria, scale and implementation contents for health risk assessment for priority stationary sources.