Specifications include, but are not limited to: providing technical support and supervisory personnel to assist HWR in the operation and maintenance of the cryogenic plant on a when needed basis. The project also consists of furnishing all necessary labor, materials and equipment to provide scheduled maintenance for the annual turn-around as well as scheduled quarterly visits for gel-trap thaw and process trouble-shooting as required for overall plant efficiency. The materials and equipment required in this section are defined as the equipment and/or materials needed to provide technical support and supervision of the project only. The City (HWR) will supply the parts and equipment necessary for the annual turn-around (replacement parts, values, etc.). See also Section 6D. Historically, the contractor has visited the site approximately every 90 days for a quarterly visit and one of these quarterly visits is also the annual turn-around. All other related work such as operator training, etc. shall be scheduled on an as needed basis.