The three main tasks of this project include: 1) to integrally analyze air quality data and diagnose the causes of air pollution episode days; 2) to assess the performance of air pollution reduction control for air quality areas; and 3) to promote air pollution reduction for the No.6 Naphtha Cracker off-shore island industrial zone. The critical results are abstracted as bellow:
1) Air quality data analysis and air pollution causes diagnosis
In the last ten years, it can be seen that poor air quality rate (PSI>100) of the Middle air quality area reached the highest, which indicated 5.66% in 2004.
The key pollutant is O3, but the poor quality rate of PM10 in the Changhua County and the Taichung City are relatively high. The poor air quality rate of the YUN-JIA-NAN air quality area is higher than it in the Middle; however, there are no obvious differences between those counties and cities in this area.
Comparing to the poor air quality rate reviously, it has improved in 2010 (from January to October). The average rate of poor air quality is merely 1%, with most of the air pollutants reduced. But the NO2 concentration in the
Taichung City was not improved.
According to the data from the photochemical monitoring site, it is apparent that air quality at the Taishi site influenced by No.6 Naphtha Cracking Unit of FPCC because the concentration of specific pollutants were especially high.
The high concentration of xylene in the Tainan site also occurred. Mapping these symptoms with pollution source registration data, the petrochemical and solvent consuming industry might be the primary sources of the pollution.
Therefore, further operation control should be enhanced continuously.
In addition, the Changhua, Lunbei and Putzu sites were evidently affected by the wade dusts based on the PM10 episode analysis. It shows that water resource agency should also put more and more efforts on wade control as environmental protection agency on pollution source control to reduce air pollution episodes.
2) Air pollution reduction control for air quality areas
This task emphasized on construction sites control, achievement of total mass reduction objectives, and the extent control of VOCs sources. The main results of this part were addressed as followed.
Besides the Taichung County, Taichung City and Chiayi City, the reduction rate of construction sites in 2010 (from January to September) of counties and cities were comparatively increased to the same period in 2009. The Nantou
Conunty, Changhua County and Chiayi County increased the most above all.
However, the total emission amount increased with the number of construction sites. Therefore, emission control of construction sited should be continuously enhanced.
In order to control the total mass under the limit of assimilative capacity and achieve the reduction objectives, the first action meeting of air quality areas was held by this project. The Environmental Volunteer Engineering Consultants, LTD. was invited to introduce the total mass control strategy for the Middle air quality area and the YUN-JIA-NAN air quality area. The
reduction tolerance and objectives of the counties and the cities within the Middle air quality area were planned in the meeting on May 31, 2010, and those of the counties and the cities within the YUN-JIA-NAN air quality area
were planned in the meeting on April 2, 2010. To summarize the progress from January to September in this year, only the reduction objectives of SOx and NOx in the Middle air quality area and NOx and VOCs in the YUN-JIA-NAN air quality area were not met.
According to the checking results from other cities and counties, the numbers of plastic and rubber products and chemical products industries that are under supervised are little, and the use of petrochemical products and organic solvents is relatively high. Therefore, to promote the general survey towards the aforementioned industries in each county and city is the critical
work in this year. 979 factories are scheduled to be investigated in Changhua County, followed by Taichung County 869 factories and Tainan County 438 factories. For the time being, the progress of general survey is still low and lots of factories are left unchecked, especially in Taichung County and Changhua County. As a result of large workload, the parts in Taichung County will be executed by another project contract in the end of 2010.
The best outcomes with newly supervised 242 factories and 233 factories are in Changhua County and Tainan County respectively, followed by 47 factories in Taichung City. Moreover, new emission controls as the top three are in
Changhua County, Tainan County and Yunlin County. The amounts are 97.350
tons, 37.470 tons and 7.502 tons. This project will continue to track the survey
result and the status of pollution control in countries and cities next year.
3) Promotion of air pollution reduction project in the No.6 Naphtha Cracker off-shore island industrial zone
Due to the difference in measurement methods of VOCs and lack of some pollution sources, the emission amount reported by the No.6 Naphtha Cracker are always questioned. Since the environmental impact assessment and measurement of air pollution fee are not identified clearly, the emission amount of paint coating and cooling towers are not calculated. Preliminary estimated amounts of these two pollution sources are about 1,200 tons per year. It is proposed to include them into measurement in the future. In addition, although the equipment components and exhausted gas urning towers are listed items, the coefficient measurement method is in different ways, and the actual operating status of the burning tower is not confirmed, the estimated emission amounts are, in fact, with big discrepancy.
The project also found that there are still some violations of regulatory requirements on the operation of air pollution sources in No.6 Naphtha Cracker; for example, exhausted gas burning tower contains excessive concentrations of H2S, tank breather valve contains excessive concentrations of VOCs and parts of the declaration data are missing, etc. The relevant departments are involved in dealing with those problems. However, parts of the violations are caused by the unclear laws and regulations. It is proposed to amend the relevant laws and regulations to implement the control target accordingly.