Clean production equipment.
- 51-8031.00 Water and Wastewater Treatment Plant and System Operators
- 51-9021.00 Crushing, Grinding, and Polishing Machine Setters, Operators, and Tenders
- 51-9193.00 Cooling and Freezing Equipment Operators and Tenders
- 51-8093.00 Petroleum Pump System Operators, Refinery Operators, and Gaugers
- 51-9012.00 Separating, Filtering, Clarifying, Precipitating, and Still Machine Setters, Operators, and Tenders
