(S) Asbestos

(S) Boring and Tunneling

North Carolina Building Contractor

(PU) Communications

(S) Concrete Construction

PU Electrical -- Ahead of Point of Delivery

(PU) Fuel Distribution

(H) Grading and Excavating

Highway Contractor

(S) Insulation

S Interior Construction

(S) Marine Construction

S Masonry Construction

S Metal Erection

PU Public Utilities Contractor

S Railroad Construction

Residential Contractor

S Swimming Pools

PU Water Lines and Sewer Lines

PU Water Purification and Sewage Disposal

(PU) Electrical -- Ahead of point of delivery

S Roofing

(PU) Water Purification And Sewage Disposal