People are always exposed to environmental hazardous agents in indoor and outdoor environments. Therefore, researches have been carried out on exposure assessment in Korea and foreign countries as well. The data of time spent in micro-environments play important role regarding assessing personal exposure. Personal exposure can bedecided by time-activity pattern indicating when, where and which activities people conduct and social demographic factors of individuals. Subsequently, various environmental factors including sociodemographic characterization and exposure pathway should be investigated for personal exposure assessment of environmental hazardous agents.
The purpose of thesis is to analyze the exposure pathway which influences on personal exposure with time-activity pattern along with sociodemographic factors. Targeting 379 persons collected from the second term of Korean National Environmental Health Survey, and questionnaire survey about time-activity pattern was carried out with personal exposure to benzene , toluene, ethylbenzene, and xylene. And their biological metabolites such as urine and blood were sampled and analyzed. It was checked if exposure density gets different along each micro-environment for various social-demographic factors and the factors that influence on BTEX personal exposure and density of biological material metabolites using multiple regression analysis. A total of 379 participants spents their times in indoor house with the 16.82±3.98 hr, workplace or school 2.29±3.45 hr, and other indoor 2.09±2.19 hr. Each personal and metabolites exposure levels of BTEX is shown lognormal distribution (p<0.05). Each Socioeconomic and demographic factors were significantly different among each personal exposures, metabolites and micro-environments. Time of staying at the office turned out to be main factor from point of exposure in exposure pathway using multiple regression analysis. As a result, it means that the exposure may net different along the time of staying at each micro-environment.