22 15 00 General Service Compressed-Air Systems 22 61 00 Compressed-Air Systems for Laboratory and Healthcare Facilities 23 00 00 Heating, Ventilating and Air Conditioning (HVAC) 43 15 00 Process Air and Gas Filters 44 10 00 Air Pollution Control 46 51 00 Air and Gas Diffusion Equipment 50 59 00 Construction Material Delivery/Hauling 50 61 00 Construction Material Supplier 50 63 00 Equipment/Tool Sales 50 64 00 HVAC Supplies

05 50 00 Metal Fabrications 03 00 00 Concrete 03 30 00 Cast-in-Place Concrete 05 10 00 Structural Metal Framing 43 40 00 Gas and Liquid Storage 05 52 00 Metal Railings 08 11 00 Metal Doors and Frames 08 31 00 Access Doors and Panels 08 90 00 Louvers and Vents 10 26 00 Wall and Door Protection 10 26 13 Corner Guards 10 70 00 Exterior Specialties 10 82 00 Grilles and Screens 12 48 19 Entrance Floor Gratings 13 20 00 Special Purpose Rooms 14 91 82 Trash Chutes 14 92 00 Pneumatic Tube Systems 23 13 00 Facility Fuel-Storage Tanks 41 00 00 Material Processing and Handling Equipment

02 65 00 Underground Storage Tank Removal 23 13 00 Facility Fuel-Storage Tanks 33 56 00 Fuel-Storage Tanks 40 14 00 Fuel Gases Process Piping 40 22 00 Petroleum Products Piping 43 10 00 Gas Handling Equipment