| 英文摘要 |
In order to assess the impact of Pingnan Industrial Park (abbreviated as “the Park” hereafter) on the neighboring air quality and establish a pollution benchmark for future major investment projects in the Park, this project surveyed the surrounding area for the overall air quality and dioxin concentration in the air, crops, and aquatic species.
Currently, there are eighty-six factories in the Park. Among them, forty-one factories are regulated under the “Stationary Pollution Source Installation and Operating Permit Management Regulations” (three of them are suspended voluntarily). Forty-one factories are not regulated under the “Stationary Pollution Source Installation and Operating Permit Management Regulations” (three of them are voluntarily suspended and another two ceased production). Three factories are temporarily suspended. The other factory is under construction. The current annual emissions of the major pollutants are: particle pollution (85.292 ton/yr), SOx (112.153 ton/yr), NOx (101.65 ton/yr), VOCs (264.494 ton/yr), and dioxins (63.826 mg I-TEQ/yr). The projected maximum emissions assuming full capacity (including factories that are operating, have suspended operations, and are under construction) of major pollutants in the next three years (2009 to 2012) are: particle pollution (396.921 ton/yr), SOx (445.08 ton/yr), NOx (378.073 ton/yr), VOCs (509.158 ton/yr), and dioxins (712.4 mg I-TEQ/yr).
The results of the air quality monitoring indicate that PM10 and O3 are the most serious pollutants. In this survey, the average amount of dioxin (from 12 samples from 4 different sampling time points) is 0.054 pg W-TEQ/m3, which is lower than Japan’s 0.6 pg W-TEQ/m3 maximum allowable limits. The average dioxin concentration sampled from the aquatic species and crops are 0.538 pg W-TEQ/g w.w. (lower than the maximum allowable limits of 4 pg-TEQ/g w.w. set by the National Department of Health) and 0.159 pg I-TEQ/g w.w, respectively. Overall, there are no pollutants above maximum allowable limits.
A simulation using the ISCST3 model predicts that, under the assumption of maximum operating capacity, the highest dioxin, TSP, SO2, and NO2 concentrations will occur within the industrial park. For dioxin, the highest 24-hour and annual average concentrations will take place in the southern part of the industrial park. For TSP, the 2 highest 24-hour and annual average concentration area will be in the south and northeast of the industrial park. For SO2 and NO2, the highest 24-hour average concentration area will occur in the south and northeast, whereas the highest annual average area will occur in the south of the industrial park. Outside of the industrial park, the simulation results predict that Dong-Hai Township, located southwest of the industrial park, will be the area most affected by the pollutants generated by the park.
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