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(15-35) Statistical analysis of atmospheric measurement data of toxic chemicals in Japan (3). Katatani, Noritaka*,1, Miyashita, Naoyuki1, 1 Dept. Ecosocial System Engineering, Yamanashi University, Kofu, Japan ABSTRACT- In recent years, the toxicity of many chemical species has been getting much attention regarding their effect on human health. Their exposure routes to human bodies are very complex, however, it is well known that the atmospheric process is the major route. In Japan, Environment Agency began to conduct a measurement campaign since 1994 focusing the atmospheric concentration of 22 major chemical species. The authors have reported the preliminary result of the statistical analysis of this dataset in the previous meetings(2000 and 2001). This paper reports some new results using the measurement data in another year. Principal statistical procedures used in this study are multiple regression analysis, factor analysis and regression analysis with socio-economic data. Furthermore, some trial calculations to estimate regional risk were carried out. The principal results are as follows: 1) The concentrations of most compounds are decreasing in recent four years. 2) Factor analysis can show the source pattern of whole species. 3) Risk by benzene is so large in Japan. Key words: Statistical analysis, Atmospheric concentration, Source identification, Risk assessment |
