44 00 00 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