Table 3.
Establishing criteria for CS2 exposure concentration by department
| Department | CS2 -exposed Concentration (ppm) | Job Contents |
|---|---|---|
| High exposure concentration department | ||
| Spinning | ||
| Doping | 6.53 | Threading up a spinning machinery and taking out the cake, As CS2 is released during rayon regeneration, exposure concentration is highest with direct exposure. |
| Circuit | 6.58 | In the spinning room having a tangled or broken thread, As CS2 is released during rayon regeneration, exposure concentration is highest with direct exposure. |
| Motor Repair | 3.79 | Repairing motors of a spinning machinery |
| Moderate exposure concentration department | ||
| Electrical Equipment Repair | 4.33 | High amount of spinning room work while repairing electrical equipment due to mechanical corrosion problems. |
| Maitenance of Ejector | 3.03 | It is intermittent for reasons such as machine maintenance, but working within the spinning department |
| Collection of Sulfuric acid | 3.79 | CS2 mixed in the recovered solution. |
| Manufacturing of CS2 | 2.77 | Exposure to high concentrations of CS2 for a short time while manufacturing, but protective gear is used. |
| Post-Process | ||
| Packing | 3.6 | Restricted to the spinning room |
| Carrying | 1.96 | Working in a spinning room for a long time to transport rayon. |
| Refining | 2 | Exposure to remaining CS2 while processing semi-finished cake |
| Maintenance | 2.16 | Estimated at 50% of that in the electrical equipment repair department |
| Manufacturing of Viscose | 1.35 | |
| Low exposure concentration department | ||
| Water Treatment | 0.45 | Sewage inspection and cleaning in the spinning room |
| Manufacturing of Chemicals | 0.23 | Estimated at 50% of that in the water treatment department, production of caustic soda and liquid chlorine, lower possibility of direct exposure. |
| General Affairs | 0.12 | Estimated at 50% of that in the manufacturing department |