The Contractor shall furnish, on an as-needed basis, specialty chiller repair services and all necessary tools, materials, instruments, equipment, parts, supplies, gases, consumables, insurance, expertise, supervision, management, transportation and appurtenances necessary to service, regulate, adjust and repair chillers at the Calumet Water Reclamation Plant (CWRP), Stickney Water Reclamation Plant (SWRP), Egan Water Reclamation Plant (EWRP), and Kirie Water Reclamation Plant (KWRP) for a three (3) year period. The District will furnish general directions to the Contractor that will enable him to perform the work. The Contractor shall provide service on as-needed basis. The Contractor shall be able to provide 24-hour emergency service.