As used in this chapter, the following terms shall have the meanings indicated:
EXCAVATORA person who is engaged in a trade or business which includes, as a normal part thereof, the carrying out of excavation or demolition operations.
OPERATORAny person who operates an underground facility or facilities to furnish services or materials, including but not limited to electricity, gas, steam, liquid petroleum products, telephone or telegraph communications, cable television, sewerage systems, traffic control systems and water.