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CFM/1,000 Gallons of tank volume. The blower will be capable of delivering a minimum <br /> of 22 CFM when operating at 6 PSI. Each motor will be 1.0 HP, ODP type, for operation <br /> on 230 volt, 1 phase, 60 Hertz. <br /> Two (2) positive displacement blower/motor units will be supplied for the plant. The <br /> blower/motor units will be capable of providing a minimum of 2,050 cubic feet of air per <br /> pound of BODS plant loading. Each blower will be capable of delivering a minimum of 70 <br /> CFM when operating at 6 PSI. Each motor will be 5.0 HP, ODP type, for operation on <br /> 230 volt, 1 phase, 60 Hertz. <br /> Each blower/motor will be mounted to a reinforced molded fiberglass base which will <br /> be mounted on vibration dampeners. The motor will be mounted on an adjustable <br /> mounting base. The blower will be fitted with a dry type filter/silencer at the air intake. <br /> Each blower discharge will be fitted with a check valve, and a flexible rubber discharge <br /> coupling. The blower/motor units will be located in an adjacent control room. <br /> Central Control Panel (Panel to be installed in adjacent control room): <br /> A central control system installed within a fiberglass NEMA 4X weatherproof enclosure <br /> will be provided. The electrical controls will consist of magnetic starters, program <br /> timers and switches necessary to automatically control all electro-mechanical <br /> components on the treatment system. M-O-A selector switches and magnetic starters <br /> in conjunction with the programmable timer will control the blower motors. The <br /> programmable timers will have the capability to operate the aeration system as <br /> required by the variation in the daily flow rate. Properly sized circuit breakers and fuses <br /> will protect all electrical equipment and circuitry. All duplex or standby equipment will <br /> be designed so devices in the control system can operate them. The enclosure will be <br /> wired for 230 volt, 1 phase, and 60 Hertz incoming power. The enclosure will be <br /> installed in an adjacent control room. <br /> Service Grating: <br /> Service grating will be provided on the top of the tank to allow access for servicing the <br /> plant equipment. All grating will be constructed of 18 gauge galvanized sheet steel. <br /> Each grating panel has a standard 9" surface width with a 2-1/2" rib depth. Each panel <br /> will be so supported as to have a safe uniform load carrying capacity of 80 pounds per <br /> square foot. <br /> Page 7 of 11 <br />