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PM10 concentrations were measured In underground stores located In 4 major cities, Chunchon, Wonju, Donghae and Sockcho, In Kangwon-Do using scattering light Integated type digital dust indicator. Per- sonal exposure to for two women(housekeeper and gaduate students and a man(undergraduate student) were measured also. The dimensional conversion factors for mass concentrations(K) showed some difference among un- derground stores which were 2.0, 2.7, 3.4, 2.6 mg/.CPM In chunchon, Wonju, Donghae and Sockcho, respectively. Average PMlo concentrations at underground stores were 178mg/ in Chunchon, 141mg in Wonju, 125 mg/ Donghe and 59mg/) Sockcho. The portion of In total suspended particles was about 50~60% as deight The exposure of graduate student, housekeeper and undergraduate to during 12 hours were 1004. 3 (mg/) .hr, 907.0 (mg/) hr and 691.2 (mg/) hr, respectively. Personal exposure to showed very different according to heP activity pattern and they had more than 90 % of their exposure at Indoor environment.
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