- Hazardous Materials Removal Workers Green
- Rail-Track Laying and Maintenance Equipment Operators
- Rotary Drill Operators, Oil and Gas
- Service Unit Operators, Oil, Gas, and Mining
- Explosives Workers, Ordnance Handling Experts, and Blasters
- Helpers--Extraction Workers
- Petroleum Pump System Operators, Refinery Operators, and Gaugers
- Separating, Filtering, Clarifying, Precipitating, and Still Machine Setters, Operators, and Tenders
- Gas Compressor and Gas Pumping Station Operators
- Pump Operators, Except Wellhead Pumpers