Specifications include, but are not limited to: The contractor shall provide all labor, material, and equipment necessary to perform routine service and emergency calls on all types, makes and sizes of irrigation systems. Contractor shall have a working knowledge of the functionality of the components of irrigation systems. An irrigation system consists of a carefully engineered assembly of pipes, backflow prevention device, valves, sprinkler heads, electrical wires and other hardware. All components of the irrigation systems are covered under this contract. The contract will provide for preventative maintenance, spring start up, winterization, minor/major repair, and equipment inspections. Contractor shall perform preventative maintenance and repairs in order to keep the irrigation systems operational to the required performance levels as designed by the original equipment manufacturer.