The duties of the County Purchasing Agent shall include responsibility for: (1) the making of all purchases and the contracting for all public work and services for which payment is to be made out of County funds; (2) the establishment, after consultation with the appropriate County officials, of specifications and standards for all supplies, materials and equipment, and the inspection of all deliveries to insure compliance with such specifications and standards; (3) the establishment and maintenance of a system of requisitions and receipts covering the furnishing of supplies, materials, and equipment to the various using agencies; (4) the preparation for legislative action thereon by the Council of reasonable rules and regulations governing emergency purchases, contracts, and services or material and equipment of an unusual or noncompetitive nature which shall not be subject to competitive bidding; (5) the sale or other disposition of surplus, old, and waste supplies, materials, and equipment or the transfer of same between using agencies; and (6) the conduct of programs involving joint or cooperative purchasing with other public jurisdictions.