37 technical consultation in the field of land development services, namely, planning and laying out of residential and/or commercial communities; technical consulting in the field of land development services, namely, planning and laying out of commercial buildings; earthworks services in the nature of excavating for building construction; construction services, namely, grading; construction services, namely, site clearing; construction services, namely, excavation; installation of utilities in construction sites; installation and maintenance of traffic control apparatuses for building construction sites; soil erosion control services for construction sites; construction services, namely, building retaining walls, curbs, sidewalks, asphalt paving, road striping and installation and maintenance of road signs