Table 1.
Summary of the review of work environment monitoring results from 2012 to 2014.
| Plant | Classification | Number of Samples (%) | ||||||
|---|---|---|---|---|---|---|---|---|
| Detection | Non-Detection | Overall | ||||||
| A | Type of sample * | Personal | 3053 | (16.6) | 15,344 | (83.4) | 18,397 | (100) |
| Area | 123 | (11.6) | 938 | (88.4) | 1061 | (100) | ||
| Type of work * | Operation | 2730 | (18.4) | 12,100 | (81.6) | 14,830 | (100) | |
| Maintenance | 446 | (9.6) | 4182 | (90.4) | 4628 | (100) | ||
| Carcinogenicity * | Carcinogen | 407 1 | (11.4) | 3150 | (88.6) | 3557 | (100) | |
| Non-carcinogen | 2769 | (17.4) | 13,132 | (82.6) | 15,901 | (100) | ||
| Total | 3176 | (16.3) | 16,282 | (83.7) | 19,458 | (100) | ||
| B | Type of sample * | Personal | 712 | (7.7) | 8554 | (92.3) | 9266 | (100) |
| Area | 588 | (18.0) | 2671 | (82.0) | 3259 | (100) | ||
| Type of work * | Operation | 1107 | (9.8) | 10,213 | (90.2) | 11,320 | (100) | |
| Maintenance | 193 | (16.0) | 1012 | (84.0) | 1205 | (100) | ||
| Carcinogenicity * | Carcinogen | 461 2 | (26.3) | 1289 | (73.7) | 1750 | (100) | |
| Non-carcinogen | 839 | (7.8) | 9936 | (92.2) | 10,775 | (100) | ||
| Total | 1300 | (10.4) | 11,225 | (89.6) | 12,525 | (100) | ||
* p < 0.01 (Chi2-test); 1 Chemical name (carcinogenicity class, number of samples, maximum ratio of TWA to occupational exposure limit): Arsenic & inorganic compounds (1A, 22, 0.08), Formaldehyde (1A, 313, 0.06), Nickel (insoluble inorganic compounds) (1A, 2, 0.02), Hydrogen peroxide (2, 1, 0.01), Naphthalene (2, 6, 0.0004), Nickel (metal) (2, 10, 0.0008), Sulfuric acid (strong acid mist) (1A, 8, 0.042), Titanium dioxide (2, 26, 0.00002), Tetrahydrofuran (2, 1, 0.1), Welding fumes and dust (2, 18, 0.026); 2 Chemical name (carcinogenicity class, number of samples, maximum ratio of TWA to occupational exposure limit): Formaldehyde (1A, 52, 0.07), Nickel (insoluble inorganic compounds) (1A, 6, 0.003), Sulfuric acid (strong acid mist) (1A, 120, 0.37), Hydrogen peroxide (2, 282, 0.21), Titanium dioxide (2, 1, 0.0012).