| 3131 |
Power production plant operators
|
Technicians and associate professionals
|
Science and engineering associate professionals
|
Process control technicians
|
1 |
| 3132 |
Incinerator and water treatment plant operators
|
Technicians and associate professionals
|
Science and engineering associate professionals
|
Process control technicians
|
7 |
| 3133 |
Chemical processing plant controllers
|
Technicians and associate professionals
|
Science and engineering associate professionals
|
Process control technicians
|
4 |
| 3134 |
Petroleum and natural gas refining plant operators
|
Technicians and associate professionals
|
Science and engineering associate professionals
|
Process control technicians
|
1 |
| 3135 |
Metal production process controllers
|
Technicians and associate professionals
|
Science and engineering associate professionals
|
Process control technicians
|
2 |
| 3139 |
Process control technicians not elsewhere classified
|
Technicians and associate professionals
|
Science and engineering associate professionals
|
Process control technicians
|
4 |
