Construction services, namely, grading, excavation, excavation area backfilling, site preparation, site clearing, building demolition, concrete casting in the nature of concrete pouring and forming for buildings and other commercial or public concrete structures, concrete modifications in the nature of concrete cutting and boring, concrete and asphalt sealing, street and pavement marking, asphalt paving, and installation and rehabilitation of underground wet utilities, namely, water and sewer lines; construction project management services