44 Pollution and Waste Control Equipment
44.01.00 Operation and Maintenance of Pollution and Waste Control Equipment
44.01.10 Operation and Maintenance of Air Pollution Control 44.01.20 Operation and Maintenance of Noise Pollution Control 44.01.30 Operation and Maintenance of Odor Control Equipment 44.01.40 Operation and Maintenance of Water Pollution Control Equipment 44.01.50 Operation and Maintenance of Solid Waste Control and Reuse 44.01.60 Operation and Maintenance of Waste Thermal Processing Equipment