The scope of work included in this contract will serve as a checklist for the maintenance services performed. Contractor will be required to bring the checklist each time the quarterly maintenance is performed. All items on the checklist will be checked off as performed. Upon completion, Contractor will provide the Area office on site contact person with the list. The list will be signed and dated by both the Contractor and the Area office and filed in the appropriate logbook. Additionally, an extra copy shall be left with the Area office on site contact person. This checklist shall accompany the invoice prepared by the Contractor for the quarterly maintenance. The quarterly maintenance fee shall include the manufacturer’s recommended preventive maintenance parts or kit, including filters, fan belts, water treatment chemicals, compressor oil, cleaning rags, oil, and grease. Costs for recapture of refrigerant as required by law must also be included.