Journal of Korean Society of Occupational and Environmental Hygiene (한국산업보건학회지)

Korean Industrial Hygiene Association (한국산업보건학회)
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Characteristics of Workers'Exposure Concentration and Daily Variations to Organic Solvents in Shipbuilding Painting Processes

조선소 도장작업 노동자 유기용제 노출과 일간 변이

  • Ahn, Jinsoo (Department of Mechanical System Engineering, Hansung University) ;
  • Park, Dooyong (Department of Mechanical System Engineering, Hansung University) ;
  • Kang, Taesun (Department of Health and Safety Engineering, Semyung University)
  • 안진수 (한성대학교 기계시스템공학과) ;
  • 박두용 (한성대학교 기계시스템공학과) ;
  • 강태선 (세명대학교 보건안전공학과)
  • Received : 2019.10.14
  • Accepted : 2019.12.19
  • Published : 2019.12.31
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Abstract

Objectives: This study was conducted to identify the characterization of organics solvent exposure among painting workers in the shipbuilding painting process, especially for their daily variations(within worker variance). Methods: Charcoal passive dosimeters were worn throughout each work shift for 20 days for five painting workers from October 19 to November 26, 2015. A total of 100 samples were collected, analyzed and compared with statutory workplace environmental measurements. Results: The geometric mean(GM) and geometric standard deviation(GSD) of mixed organic solvent(six substances) exposure index(EI) for the 100 samples were 0.42 and 4.42 respectively. The median and range of GSD for within worker EI representing five workers' daily EI variation is 3.72 and 2.63 ~ 5.20, respectively, which is classified as a very large variation(GSD>3). We were able to divide the painting process into two similar exposure groups(SEGs), Touch-up and Spray. Spray painting workers were much more exposed to organic solvent than Touch-up painting workers(GM=0.71 vs. 0.19), but less variably (GSD=3.64 vs. 4.10). xylene is the substance to which the workers were most exposed(GM=16.19 ppm, GSD=4.36), and the exposure characteristics of six substances including xylene is similar to those of EI. Conclusions: The daily variation of organic solvent exposure in the shipbuilding painting process is so high that statutory Assessment of Reliability of Work Environment Monitoring needs to be conducted with statistically sufficient number of samples and evidence.

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References

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