The author selected 77 dust emissing processes from 71 types of industries which placed in Sasang Industrial Complex in Pusan. The level of total dust was measured as areal concentration and personal exposure concentration by low volume air sampler and personal air sampler, respectively. Collected samples were classified into 5 groups (chemicals and rubber product, metal product, sawmills and wood, foundries and others). Respirable particulate and total dust of areal and personal exposure were analyzed. The results were as follows ;
1. All of the respirable dust concentration and total dust of steal and personal concentration were log-normally distributed.
2. Geometric mean of respirable particulate of personal exposure concentration measured 0.55 ㎎/㎥ in the first group, 0.86 ㎎/㎥ in the second group, 0.39 ㎎/㎥ in the third group, 0.81 ㎎/㎥ in the forth group and 0.52 ㎎/㎥ in the fifth group. The exceed rates over TLV (the hold limit values) of total dust were 31.3% in the first group, 31.3% in the second group. 70% in the third group, 80% in the forth group and 13.3% in the fifth group.
3. There were significant difference between steal and personal exposure concentration and personal exposure concentration was higher than that of area.
4. In the case of high ratio of respirable particulate to total dust, pneumoconiosis incidence was high even though the workshop was opened and emissing dust concentration was low.
These findings suggest that it is desirable to measure respirable particulate in environmental assessment of dust emissing workshops.
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