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pumping equipment will meet system flows and heads required. In addition,pre- submittal must also demonstrate to the satisfaction of the Engineer that the equipment being proposed meets or exceeds all performance and safety requirements, materials of construction and user benefits of the specified equipment. All bids utilizing manufacturers not pre-approved will be considered non-responsive. 1.05 Operation and Maintenance Manual Four (4) copies of an operating and maintenance manual for the grinder pump station shall be furnished to the Owner and one (1) copy to the Engineer prior to completion. The manuals shall be prepared specifically for this installation and shall include all required cuts, drawings, equipment and parts lists, descriptions, etc. that are required to instruct operating and maintenance personnel familiar and unfamiliar with such equipment. 1.06 Warranty The pump manufacturer shall provide a parts and labor warranty on materials and workmanship for a period of thirty-six(36)months after notice of Owner's acceptance. The Owner will return any equipment found defective to the manufacturer for inspection and validation of the defect. Level controls shall be warranted to be free from defects for a period of ten(10)years from acceptance of owner. 1.07 Operating Conditions The pumps shall be capable of delivering 15 gpm against a rated total dynamic head of 0', 12 gpm against a rated total dynamic head of 80' and 6 gpm against a rated total dynamic head of 220'. The pump shall be capable of running throughout the curve as well as at negative heads without overloading the motor. PART 2 PRODUCTS 2.01 Pump Each grinder pump shall be a heavy duty pump used as a grinder. Each grinder pump shall be capable of reducing all components in normal domestic sewage, including a reasonable amount of "foreign objects", such as paper, wood, plastic, glass,rubber and the like, to finely-divided particles which will pass freely through the passages of the pump and the 1-1/4" diameter discharge piping. Major pump components shall be of grey cast iron, ASTM A-48, Class 3013, with smooth surfaces devoid of blow holes or other irregularities. All exposed nuts or bolts shall be AISI type 304 stainless steel. All metal surfaces coming into contact with the wastewater, other than stainless steel or brass, shall be protected by a factory applied spray coating of acrylic dispersion zinc phosphate and polyester resin enamel. The pump rotor shall be 304 stainless steel, with a 520-720 tensile strength, a minimum of 40% elongation and maximum of 200 HB hardness. For increased stability and reduced shaft deflection a brass ring shall be tightly affixed to the pump rotor below the lower mechanical seal. The pump stator shall be Nitrile rubber and shall be resistant to wear caused by materials found in domestic sewage including but not limited to coffee grounds, powder detergent and the like. 2