| 英文摘要 |
Currently there are 83 enterprises in the Pingnan Industiral Park, including 44 under fixed pollution source control. 33 are not under control, 5 have shut down temporarily, and 3 are under application and/or construction.
The three-season air quality monitoring under this project was completed, and the intensity change of pollutants is small, except for transient surges of NMHC, where the source is assumed to be airborne VOCs pollutants. An odor detection test had been carried out on the plant ambiance with findings showing a breach of control limits. The Environment Protection Bureau had issued accusation tickets and undertaken counselling actions.
The 9-point/time average of air dioxin intensity within the boundary in three seasons was 0.043pg I-TEQ/m3 (SD=0.029 and excludes PCBs). Test results show that Dong Hai Primary School has the higher reading than other 2 test points due to influences from the industrial area. Additional tests of the 3rd and 4th season PCBs averaged arround 0.028 pg W-TEQ/m3, far lower than the annual average of environment air quality in Japan: 0.6 pg W-TEQ/m3. This range of concentration, which is similar to that of the ambiance of Kaohsiung City discharge sources, that of urban areas of Spain, and that of EPA’s Yun-Lin air quality monitor stations, is within the range of the countryside.
The 8-point/time soil dioxin intensity in all three seasons was 1.047ng I-TEQ/kg (SD=0.370). The respective concentrations of each sample was far lower than the standard soil dioxin concentration of 1000 ng I-TEQ/kg, which is specified by the Environment Protection Administration (EPA) of the Executive Yuan. The scope of concentration, which is similar to that of the ambiance of Chiayi City Incineration Plant and that of Guai-Yu in China, is rather low. The 8-point/time plant dioxin intensity in three seasons was 3.585pg I-TEQ/g.d.w. (SD=2.380), similar to that of banyan leaves in the ambiance of Ren-Wu and Gang-Shan Incinerator Plants of Kaohsiung City, as well as that of pine leaves in the ambiance of discharge sources in Japan.
Analyzing dioxin concentrations of ambient air and vegetables using major ingredients of 17 characteristic species, the pollutant specimens most similar to the majority of air samples were that of secondary aluminum smelter and crematory. As for vegetable specimens, they were similar to most pollutants but not significantly approximating to specific ones. In general, pollutants of small incinerators, secondary aluminum smelters, thermal decomposition or tires, and crematories are more related to samples of respective environments.
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