The work plan includes the air quality analysis, PM2.5 sampling and analysis, review of air pollution control objectives and strategy, supervision and management of air pollution control plan.
A. Air quality analysis
1.PSI (pollution standard index) >100
Since Year 94, the national average value of station days with PSI > 100 has been declined and improved for several years in Taiwan. Among of the north air quality zone, the main pollutant of Taoyuan county in Year 94 – Year 97 are air suspended particles (PM10 ) and ozone (O3); and the pollutant of the other counties and cities is largely O3 . In Taoyuan county, the percentage of station days with PSI > 100 expresses the declining trend from 1.79% of Year 94 (26 station days) down to 0.07% of Year 99 (1 station day).
2.The improvement of pollutant index
The yearly average value of PM10 is 52μg/m3 in Year 99, which is reduced by 1.9μg/m3 as compared with 53.9μg/m3 of Year 98; the 8th maximum of hourly average value of O3 in Year 99 is 104.1ppb, which is also improved by 1.2ppb as compared with 105.3ppb of Year 98. Apparently, the main air pollutant concentration has been improved in recent years. By the way, the yearly average value of SO2 in Taoyuan monitoring station is 5.4ppb in Year 99, equal to that of Year 98.
3.The event day analysis
In Year 94-98, the event day analysis shows that O3 in the high pollution index has larger percentage than PM10 has. O3 pollution is mostly influenced by the climate and the geographic conditions, and its emission is not easily to spread, which forms the serious pollutant accumulation; in the other hand, PM10 pollution is mainly influenced by the sand dust storm, which increases the pollutant concentration.
B. PM2.5 sampling and analysis
Taoyuan county 24-hour average PM2.5 concentration is about 20-24μg/m3, which is lower than 35μg/m3, of the air quality standard of American boundary. Through the analysis of Receptor Model, the pollutant sources largely come from the motor vehicle, which is about 46%, and 24% from the street air dust.
C. Review of air pollution control objectives and strategy
For achieving the full air quality improvement, the control strategy is focus on the real pollution reduction and the control of Taoyuan county main air pollutant (PM10及O3) . Accordingly, the control strategy is designed majorly for stationary pollution sources, mobile pollution sources and fugitive pollution sources, respectively, and stated as the follows:
1.Stationary Pollution Source
Considering NO2 and NMHC, the preceding material of O3, as the main reduction types, the control strategy requires the county’s existing electric equipment to be met the new emission standard to achieve the strongly desired reduction quantity in the electric field. Furthermore, the strategy also aims to exactly implement the management and evaluation of the negotiated promise matters such like the cover requirement on the equipment element of Taoyuan oil refinery, high-level combustion towers and on wastewater treatment facilities, to massively reduce the emission quantity of NMHC.
2.Mobile pollution source
With the growth of the populations up to 2 million in recent years, Taoyuan has been promoted as a special municipality. The motor vehicle is increased and numbered up to 1.74 million. Since Year 98 Taiwan opening to the China tourists, the flight’s takeoff ＆ landing in year 99 is 160 thousand sorties more than that in year 98, and the passengers of entry ＆ exit are also increased by 3.5 million of trips. The growth in various economic activities is meanwhile reflecting on the result of air quality monitoring, that NO2 concentration in Dayuan and Guanyin monitoring stations is significantly rising. Once Taiwan’s free travelling market opening to the China tourists in the upcoming June of year 100, we could forecast the pollution quantity from the airport and the outbound transportation would be increase sharply. Thus, mobile pollution source control strategy is mainly designed for the establishment and promotion of the Taoyuan airport air quality clean zone. The practical plans are two of the followings: (1) to complete the connection between airport MRT and each transportation pick-up station to decrease the private vehicles travelling in and out airport; (2) to set the access system of the vehicle plat in the airport cargo area to effectively manage the freight forwarder to fulfill their vehicle self-management work.
3.Fugitive pollution source
The main fugitive pollution source is from the construction sites. Especially, the widening of National Highway No.1 ＆ No.2 and the construction of Airport MRT Connection to other cities make the air pollution situation in between minor and medium pollution at Taoyuan Agricultural & Industrial monitoring station and Quishan Industrial district monitoring station. Therefore, the control objective and strategy would emphasize on the reduction coordination with the various large-size projects. Through the frequent inspection and the strict fine penalty, it strengthens the construction owners’ willing to invest in the pollution control facilities to lower the cost; in addition, for the airport park development, it tends to plan the permit control system of the construction project in advance and to raise the coordination opportunities before the start of the large development projects, in order to lower the influence on the region air quality during the construction development.
Taoyuan county’s air quality has been improved gradually during the recent three years (year 97 – year 99), especially in year 99 with the best air quality over the years. Thus, the relevance objectives for Year 100, 101 and Year 105 are anticipated and planned to keep the current air quality performance as the future standards. As reference to the Year 97- 99 average days of excellent air quality (PSI<50) is 49%, the plan has added the goal of achieving Year 100 average days of air quality (PSI<50) up to over 50%. In addition, the existing three categories of performance standards for the improvement and maintenance of air quality has been also revised including improvement the air pollutant index, the performance index of control work and the masses’ senses index. Through the implementation of the above mentioned control strategies, it looks forward to achieving the planned objectives.
D. Supervision and management of air pollution control plan
This plan is accordance with year 99 execution performance, to make adjustment on “1. the assessment structure of Taoyuan county implementation plan for air quality maintenance and improvement“, “2. the assessment target”, “3. the assessment methods”. Besides, according to each assessment standards, SIP will take the follow-up evaluation about the implementation progress of various air pollution control plan and the execution quality by month, and score the performance in accordance with the internal evaluation regulations. The review of the evaluation contributes EPB to control the execution performance of various plans; in addition, it also provides the commission unit with the notice function: In this plan, it is designed to collects and integrates the evaluation results of various plans monthly, and then reports and proposes the improvement methods to EPB. For the commission unit with evaluation score < 75 or the undesirable execution quality (deficiency rate > 20%), EPB will require the internal management level of the commission company to attend the review conference and propose the improvement method (attending level need to be admitted by EPB). Once still with the unsatisfied improvement situation, then it requires the upper level attending until the achievement of full improvement and then released from the review conference.
