抄録
Volatile chlorinated hydrocarbons, such as tetrachloroethylene (or perchloroethylene, PCE), have been found in many sites and in groundwater, and the pollution by these chemicals has also been observed in Kanazawa city. In this study, field surveys were conducted and the characteristics of groundwater flow in this area were examined using a key diagram of chemical composition of well water samples and multivariate analysis. The groundwater flow was divided into three categories corresponding to the quality of well water samples. Based on the study of groundwater flow, the concentrations of PCE and its degradation products (trichloroethylene (TCE) and cis-1,2-dichloroethylene (cis-DCE)) in well water samples were investigated as a function of distance from the tentative source of contamination. The total concentration of the three compounds and the degradation level which was evaluated from the molar fraction of the products (TCE+cis-DCE), were closely related to the distance from the source of contamination.
