石化工業為大氣環境中揮發性有機物重要排放源，且揮發性有機物許多具有致癌危害性，國際研究發現，暴露於致癌性揮發性有機物的環境中，發生癌症的機率有較高的趨勢；但亦有研究認為石化區民眾癌症發生率與一般民眾癌症發生率並未有顯著差異。綜觀台灣目前已進行之研究成果多只針對健康影響進行評估，並未對工業區附近居民之實際暴露與相關風險進行全面性評估。
　　故本篇研究著重於重建石化工業區以往所排放各種致癌性污染物之貢獻量，並同時配合空氣擴散模式（ISC）推估當地空氣污染物濃度之分佈情形，再經由致癌風險評估之計算試圖釐清石化污染暴露及健康影響之關係性，最後依此提出風險控制建議及風險評估參考。
初步發現，在污染物濃度分佈方面，民國74年至民國90年之盛行風向為北風，所以林園工業區中污染物之影響範圍均在林園鄉的南方；仁大工業區中污染物之影響範圍均在大社鄉之西南邊及仁武鄉之西邊。
　　在個人終身致癌風險的範圍，在林園工業區中丁二烯低暴露區為1×10-5 ~ 8.706×10-7、高暴露區為1.041×10-3 ~ 1×10-5，氯乙烯低暴露區為1×10-6 ~ 4.515×10-8、高暴露區為1.244×10-4 ~ 1×10-6，苯低暴露區為3.886×10-5 ~ 4.324×10-6、高暴露區為4.055×10-4 ~ 3.886×10-5；在仁大工業區中丁二烯低暴露區為1×10-5 ~ 2.205×10-7、高暴露區為3.856×10-4 ~ 1×10-5，甲醛低暴露區為1×10-4 ~ 5.145×10-6、高暴露區為1.543×10-3 ~ 1×10-4，苯低暴露區為1×10-6 ~ 1.757×10-8、高暴露區為2.763×10-5 ~ 1×10-6，氯乙烯低暴露區為510-5 ~ 2.264×10-6、高暴露區為3.719×10-4 ~ 5×10-5，環氧氯丙烷為2.808×10-7。

　　Petrochemical industry is an important emission source for atmospheric VOCs, and literatures have reported several health outcomes associated with the corresponding exposures. However, the conclusions have not been exactly consistent due partially to the fact that most studies have not had complete exposure data when the investigation took place. This study is therefore set to reconstruct the exposure scenarios based on the emission data collected for selected carcinogenic VOCs emitted in petrochemical complexes of study zones. Health risk assessment is planned afterwards for more conclusive relationship between chronic exposures to the above-mentioned VOCs and suspected health consequences for neighboring residents.
　　Preliminary data show that the prevailing wind in 1985~2001 was north wind. So the incidence of three carcinogen was in south of Lin-Yuan petrochemical complex. The incidence of five carcinogen was in southwest of Ta-Sheh petrochemical complex and . west of Jen-Wu petrochemical complex.
　　The personal lifetime cancer risk in Lin-Yuan petrochemical complex is Butadiene（1.041×10-3 ~ 1×10-5 and 1×10-5 ~ 8.706×10-7）, Vinyl Chloride（1.244×10-4 ~ 1×10-6 and 1×10-6 ~ 4.515×10-8）, Benzene（4.055×10-4 ~ 3.886×10-5 and 3.886×10-5 ~ 4.324×10-6）, Jen-Wu and Ta-Shen petrochemical complexes is Butadiene（3.856×10-4 ~ 1×10-5 and 1×10-5 ~ 2.205×10-7）, Formaldehyde（1.543×10-3 ~ 1×10-4 and 1×10-4 ~ 5.145×10-6）, Benzene（2.763×10-5 ~ 1×10-6 and 1×10-6 ~ 1.757×10-8）, Vinyl Chloride（3.719×10-4 ~ 5×10-5 and 5×10-5 ~ 2.264×10-6）, Epichlorohydrin（2.808×10-7）

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