Building Material Suppliers Chemical Suppliers Equipment Rental and Supply Highway Contractor Mobile/Trailer Offices Parking Lot Maintenance Safety Supplies 02 50 00 Site Remediation 03 01 00 Maintenance of Concrete 03 10 00 Concrete Forming and Accessories 07 10 00 Dampproofing and Waterproofing 07 18 00 Traffic Coatings 07 50 00 Membrane Roofing 10 14 53 Traffic Signage 31 22 00 Grading 31 25 00 Erosion and Sedimentation Controls 32 16 00 Curbs, Gutters, Sidewalks, and Driveways 32 17 00 Paving Specialties 32 18 00 Athletic and Recreational Surfacing 32 30 00 Site Improvements 32 32 00 Retaining Walls 33 16 00 Water Utility Storage Tanks 34 71 00 Roadway Construction Division 35 - Waterway and Marine Construction

31 00 00 Earthwork 31 10 00 Site Clearing 31 20 00 Earth Moving 31 23 00 Excavation and Fill 31 25 00 Erosion and Sedimentation Controls 31 40 00 Shoring and Underpinning 31 62 00 Driven Piles 31 70 00 Tunneling and Mining 31 71 00 Tunnel Excavation 33 10 00 Water Utilities 33 11 00 Groundwater Sources 33 16 00 Water Utility Storage Tanks 33 40 00 Stormwater Utilities 33 80 00 Communications Utilities

31 00 00 Earthwork 31 10 00 Site Clearing 31 20 00 Earth Moving 31 40 00 Shoring and Underpinning 31 62 00 Driven Piles 31 63 00 Bored Piles 31 70 00 Tunneling and Mining 31 71 00 Tunnel Excavation 31 71 16 Tunnel Excavation by Drilling and Blasting 32 16 00 Curbs, Gutters, Sidewalks, and Driveways 33 10 00 Water Utilities 33 16 00 Water Utility Storage Tanks 33 30 00 Sanitary Sewerage 33 40 00 Stormwater Utilities Highway Contractor Industrial Contractor Rock/Gravel/Sand Specialty Contractor Utility Contractor

02 41 00 Demolition 31 10 00 Site Clearing 31 25 00 Erosion and Sedimentation Controls 33 00 00 Utilities 33 16 00 Water Utility Storage Tanks 33 40 00 Stormwater Utilities 33 70 00 Electrical Utilities Utility Contractor

02 41 00 Demolition 21 00 00 Fire Suppression 31 00 00 Earthwork 31 05 16 Aggregates for Earthwork 31 10 00 Site Clearing 31 20 00 Earth Moving 31 22 00 Grading 31 23 00 Excavation and Fill 31 25 00 Erosion and Sedimentation Controls 31 30 00 Earthwork Methods 31 50 00 Excavation Support and Protection 31 62 00 Driven Piles 31 63 00 Bored Piles 32 16 00 Curbs, Gutters, Sidewalks, and Driveways 32 30 00 Site Improvements 32 32 26 Metal Crib Retaining Walls 33 10 00 Water Utilities 33 11 00 Groundwater Sources 33 16 00 Water Utility Storage Tanks 33 40 00 Stormwater Utilities 33 46 00 Stormwater Management 34 70 00 Transportation Construction and Equipment Construction Management Highway Contractor

02 41 00 Demolition 02 50 00 Site Remediation 02 60 00 Contaminated Site Material Removal 33 16 00 Water Utility Storage Tanks 33 46 00 Stormwater Management Consultants Environmental Site Assessments Safety Training

31 10 00 Site Clearing 33 16 00 Water Utility Storage Tanks 33 40 00 Stormwater Utilities 33 80 00 Communications Utilities Division 31 - Earthwork

01 45 00 Quality Control 01 50 00 Temporary Facilities and Controls 01 56 00 Temporary Barriers and Enclosures 02 41 00 Demolition 31 22 00 Grading 31 23 00 Excavation and Fill 31 25 00 Erosion and Sedimentation Controls 31 30 00 Earthwork Methods 31 40 00 Shoring and Underpinning Industrial Contractor Residential/Multi Family Contractor Trucking and Hauling Utility Contractor 32 10 00 Bases, Ballasts, and Paving 32 80 00 Irrigation 33 10 00 Water Utilities 33 16 00 Water Utility Storage Tanks 33 30 00 Sanitary Sewerage 33 40 00 Stormwater Utilities