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KMID : 0438219770140010161
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Korea University Medical Journal
1977 Volume.14 No. 1 p.161 ~ p.170
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Survey on Status of Working Environment in Some Industries
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李相澤/Lee, Sang Taik
李榮造/Lee, Young Jo
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Abstract
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In order to provide bases for the prevention of occupational diseases the author investigated some harmful working environments on forty-one industrial establishments in 3 industry complexes of Ulsan, Pohang, and Goomi in 1975.
The results were as follows:
1. Weaving process in textile industry, ship assembly in shipbuilding, driller in machine industry showed the highest sound level of 103 dB (A).
2. The highest concentration of dust was shown at the melting process in machine industry as 9.18 mg/ml, about 5 times of the Threshold Limit Value (TLV).
3. Organic solvents exceeding TLV were detected at assembly process in rubber industry and gravure printing, coating process in automobile industry.
4. The highest concentration of ammonia in air of ammonia room in chemical industry was 43 ppm, about a double of the TLV.
5. Air room temperature was exceeded the permissible limit at melting process in machine industry, dry-room and furnace process in pottery and glass industry, and assembly process in shipbuilding industry.
6. Concentration of inorganic lead was 0.5 mg/ma, about 3 times of the TLV, at lead coating process in electric machinery industry and lead molding process in metal industry.
7. As for metalic contamination such as chromium and zinc, 0.13 mg/ma of hromium was detected at chromium plating process in electric machinery industry and 5 mg/mg of zinc was detected at zinc plating process in shipbuilding industry. Concentration of both metals in each processes were exceeded the TLV in some degree.
8. Of 29,903 workers in 41 industries a total of 13,612(45.5%) workers were exposed to harmful
w,ri;ing envir5ain.za, over ´fLV; 9,3)1 (31.4´0 to n)iys, 1,737(6.0%7´to daV, 745 (~59,,´) 7t6 1´=rnfal_ ~3- 523;2 110) to organ c sAvcn_s, 4) l.7") to high temrerawre, and 522 (1.8%) to inorganic lead.
9. By applying 45.5 percent exposure rate to harmful -Qnvironment.:from 29,903 sampled workers, it could be estimated that a total of 35,135 workers out of 79,420 workers in the study areas were to be exposed to harmful environment.
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