Estimated 8 hour TWA exposures2-150 to MBT and its derivative by job and department title and by calendar period
| Applied to earlier periods | ||||||||
| Department | Department code | Jobs | 1955–60 | 1961–67 | 1968–77 | 1978–80 | 1981–81 | 1982–85 |
| MBT solution | 82936 | Autoclave operator, dissolver bath operator, dayman | 1.75 | 1.75 | 1.75 | 0.50 | 0.50 | 0.50 |
| Bantex or Thiotax | 99909 | Centrifuge mill operator | 4.25 | 4.25 | 4.25 | 1.75 | 1.75 | 1.75 |
| ” | ” | Day bagging operator | 4.25 | 4.25 | 4.25 | 4.25 | 0.88 | 0.88 |
| ” | ” | Packing or precipitator operator, flexible operator | 1.75 | 1.75 | 1.75 | 1.75 | 1.75 | 0.0 |
| Pelleting | 99905 | Pellet operator | 0.0 | 11.70 | 11.70 | 3.83 | 3.83 | 1.75 |
| ” | ” | Day pack operator | 0.0 | 11.70 | 11.70 | 2.33 | 2.33 | 1.75 |
| Milling and blending | 99980 | Blending operator | 1.95 | 1.95 | 1.95 | 0.64 | 3.24 | 3.24 |
| Thiofide | 82957 | Senior operator, flexible operator | 2.25 | 2.25 | 2.25 | 2.25 | 2.25 | 0.85 |
| ” | ” | Bag flake operator, dayman | 8.50 | 8.50 | 6.00 | 6.00 | 6.00 | 0.85 |
| Thiurams | 99970 | Filtrate pellet operator | 0.0 | 0.0 | 2.13 | 2.13 | 0.0 | 0.0 |
| ” | ” | Dayman | 0.0 | 0.0 | 6.50 | 6.50 | 0.0 | 0.0 |
| All others | — | — | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 |
↵2-150 The precision suggested by two places of decimals is spurious and should be ignored.