G20 Site Improvements

G2010 Roadways

G2011 Bases and Sub-Bases

G2012 Paving & Surfacing

G2013 Curbs Gutters & Drains

G2014 Guardrails and Barriers

G2015 Painted Lines

G2016 Markings & Signage

G2017 Vehicular Bridges

G2020 Parking Lots

G2021 Bases and Sub-Bases

G2022 Paving & Surfacing

G2023 Curbs, Rails & Barriers

G2024 Parking Booths & Equipment

G2025 Markings & Signage

G2030 Pedestrian Paving

G2031 Paving & Surfacing

G2032 Edging

G2033 Exterior Steps

G2034 Pedestrian Bridges

G2040 Site Development

G2041 Fences & Gates

G2042 Retaining Walls

G2043 Terrace & Perimeter Walls

G2044 Signage

G2045 Site Furnishings

G2046 Fountains, Pools, & Watercourses

G2047 Playing Fields

G2048 Flagpoles

G2049 Miscellaneous Structures

G2050 Landscaping

G2051 Fine Grading & Soil Preparation

G2052 Erosion Control Measures

G2053 Top Soil and Planting Beds

G2054 Seeding and Sodding

G2055 Planting

G2056 Planters

G2057 Irrigation Systems

G2059 Other Landscape Features

G30 Site Mechanical Utilities

G3010 Water Supply

G3011 Potable Water Distribution and Storage

G3012 Non Potable Water Distrib. and Storage

G3013 Well Systems

G3014 Fire Protection Distribution and Storage

G3015 Pumping Stations

G3016 Package Water Treatment Plants

G3020 Sanitary Sewer

G3021 Piping

G3022 Manholes & Cleanouts

G3023 Septic Disposal Systems

G3024 Lift Stations

G3025 Packaged Water Waste Treatment Plants

G3026 Septic Tanks

G3027 Drain Fields

G3030 Storm Sewer

G3031 Piping

G3032 Manholes

G3033 Headwalls & Catch Basins

G3034 Lift Stations

G3035 Retention Ponds

G3036 Ditches & Culverts

G3040 Heating Distribution

G3041 Steam Supply

G3042 Condensate Return

G3043 Hot Water Supply System

G3044 Pumping Stations

G3050 Cooling Distribution

G3051 Chilled Water Piping

G3052 Wells for Cooling/Heating

G3053 Pumping Stations

G3054 Cooling Towers on Site

L4.G3060 Fuel Distribution

G3061 Fuel Piping

G3062 Fuel Equipment

G3063 Fuel Storage Tanks

G3064 Fuel Dispensing Stations

G3090 Other Site Mechanical Utilities

G3091 Industrial Waste Systems

G3092 POL (Petroleum Oil & Lubricants) Distribution Systems

G40 Site Electrical Utilities

G4010 Electrical Distribution

G4011 Substations

G4012 Overhead Power Distribution

G4013 Underground Power Distribution

G4020 Site Lighting

G4021 Fixtures & Transformers

G4022 Poles

G4023 Wiring Conduits & Ductbanks

G4024 Site Lighting Controls

G4030 Site Communications & Security

G4031 Site Communications Systems

G4032 Site Security & Alarm Systems

G4090 Other Site Electrical Utilities

G4091 Cathodic Protection

G4092 Site Emergency Power Generation

G90 Other Site Construction

G9010 Service and Pedestrian Tunnels

G9011 Service Tunnels

G9012 Trench Boxes

G9013 Pedestrian Tunnels

G9090 Other Site Systems & Equipment

G9091 Snow Melting Systems