Table 2.
Proportion of workers exposed to diesel and/or gasoline engine emissions in selected occupations and most common exposure coding, National Enhanced Cancer Surveillance System, 1994–1997
| Occupational group | Industry code | % exposed | Gasoline engine emissions | % exposed | Diesel engine emissions | ||||
|---|---|---|---|---|---|---|---|---|---|
| Most common exposure coding | Most common exposure coding | ||||||||
| Confidence | Concentration | Frequency | Confidence | Concentration | Frequency | ||||
| Motor transport work | 9170–9199 | 85.7 | Certain | Low | Medium | 68.6 | Possible | Low | Medium |
| Bus drivers | 9171 | 100 | Certain | Low | Medium | 81.8 | Certain | Low | Low |
| Taxi drivers and chauffeurs | 9173 | 100 | Certain | Low | High | 0 | – | – | – |
| Truck drivers | 9175 | 100 | Certain | Low | Medium | 66.4 | Certain | Low | Medium |
| Mechanics | 8580–8593 | 41.5 | Certain | Low | High | 27.4 | Possible | Low | High |
| Motor vehicle mechanics and repairers | 8581 | 97.3 | Certain | Medium | High | 21.6 | Certain | Medium | High |
| Printing machinery mechanics | 8584 | 13.7 | Possible | Medium | High | 61.2 | Certain | High | High |
| Commodity salesmen | 5130–5135 | 27.0 | Certain | Low | Low | 7.3 | – | – | – |
| Commercial travelers | 5133 | 81.4 | Probable | Low | Medium | 1.0 | – | – | – |
| Route drivers | 5193 | 100 | Certain | Low | High | 35.7 | Possible | Low | Low |
| Service station workers | 5145 | 100 | Certain | Low | High | 72.2 | Possible | Low | Low |
| Railway transport work | 9130–9139 | 0 | – | – | – | 60.0 | Probable | Low | Medium |
| Locomotive operators | 9131 | 0 | – | – | – | 68.8 | Certain | Medium | High |
| Railway conductors and brake workers | 9133 | 0 | – | – | – | 89.5 | Certain | Medium | High |
| Excavators and pavers | 8710–8799 | 3.6 | – | – | – | 43.0 | Possible | Low | Medium |
| Miners and quarrymen | 7710–7719 | 1.4 | – | – | – | 92.8 | Possible | Low/High | Medium |
| Firefighters | 6111 | 96.2 | Certain | Low | Medium | 96.2 | Probable | Low | Medium |
| Dockworkers | 9313 | 100 | Possible | Low | Medium | 88.9 | Certain | Low | Medium |
| Fishermen | 7313 | 100 | Probable | Low | High | 79.4 | Probable | Low | High |
| Farming occupations | 7111–7199 | 80.6 | Possible | Low | Medium | 52.9 | Certain | Low | Medium |
| Material handling equipment operators | 9315 | 66.7 | Possible | Low | High | 54.2 | Possible | Low | High |
| Forestry and logging occupations | 7510–7519 | 81.9 | Certain | High | High | 19.0 | Probable | Low | Medium |
| Laborers and foremen | 8710–8719 | 12.1 | Probable | Low | Low | 96.6 | Certain | Medium | High |