Subcontractors Water Works General Building & Specialty Contractors (BC) General Engineering & Specialty Contractors (AC) General Engineering, General Building & Specialty Contractors (ABC) Mechanical Contractor Plumbing Sewer & Drain Line Contractor (C-37a) Subcontractors Water Chlorination & Sanitation Contractor (C-37d)

Classified Specialist (C-68) Geothermal Well & Exploratory Drilling Pumps Installation Contractor (C-57a) Pump Supplier Subcontractors Well Contractor (C-57) Water Works

Asbestos Contractor (C-19) Excavating, Grading & Trenching Contractor (C-17) Sewer, Sewage Disposal, Drain, & Pipe Laying Contractor (C-43) Sewer & Drain Line Contractor (C-37a) Water Works Structural Steel Contractor (C-48) General Contractors

Ductile Iron Pipe Fittings, Valves, Hydrants Construction Material Supplier Building Products Landscaping & Nursery Products Irrigation Supplies and Equipment Irrigation & Public Works Products Grooved Mechanical Fittings & Valves Grasspavers Fire Protection & Burgular Alarm Product Supplier Sewer Products Supplier Septic Tanks Rain Water Catchment Tank Pump Supplier Plumbing Products Supplier Plastic Supplier Piping Systems (Pre Insulated) Pipes & Valves Fittings Lighting Services/Supplies Wholesale Construction Supplies Water Works Waste Water Equipment Waste Treatment Systems Valves/Pumps Tanks Material & Equipment Dealers

Cement Concrete Contractor (C-31a) General Engineering & Specialty Contractors (AC) Excavating, Grading & Trenching Contractor (C-17) Sitework Sewer & Drain Line Contractor (C-37a) Water Works General Contractors

Consultants (Construction) Landscaping Contractor (C-27) Irrigation Supplies and Equipment Sewer, Sewage Disposal, Drain, & Pipe Laying Contractor (C-43) Pumps Installation Contractor (C-57a) Pipes & Valves Fittings Waterproofing Products Supplier Waterproofing Contractor (C-55) Water Works Water Chlorination & Sanitation Contractor (C-37d) Waste Water Equipment Valves/Pumps Tanks Material & Equipment Dealers

Crane & Rigging Conveyor Systems Supplier Construction Equipment Rental & Sales Air Conditioning Equipment Supplier & Products Instrumentation & Control HVAC Instrumentation & Controls 15900 Hoists Grease Interceptors Fire Protection Supplier Enviromental Product Sales Septic Tanks Pump Supplier Oil Water Separators Mechanical Equipment & Supplier Wholesale Distribution of Rigging/Material Handling Supplies & Equipt. Water Works Waste Water Equipment Waste Treatment Systems Valves/Pumps Material & Equipment Dealers

Landscaping & Nursery Products Irrigation Supplies and Equipment Irrigation & Public Works Products Sewer Products Supplier Pump Supplier Pipes & Valves Fittings Water Works Waste Water Equipment Valves/Pumps Material & Equipment Dealers

Material & Equipment Dealers Water Works