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from the surface of the settling tank and discharge it into the aeration compartment. <br /> Sludge Collection Box <br /> There shall be provided a sludge collection box to collect all sludge pumped from the <br /> bottom of the settling tank and the skimming device. The box shall be provided with <br /> a gravity flow pipe to the inlet end of the aeration compartment. <br /> Electrical Controls <br /> All electrical controls shall conform to the latest National Electrical code and <br /> O.S.H.A. standards. <br /> Protection from Corrosion <br /> All steel parts of the aeration plant that are in contact with the sewage shall be <br /> coated with an epoxy tar or galvanized. The aeration tank covers shall be coated with <br /> a rust preventative primer and paint. <br /> Workmanship <br /> All materials and workmanship shall be of the highest quality. The plant shall be <br /> installed by the manufacturer's personnel in an excavation prepared by others. All <br /> work shall be supervised by a qualified supervisor. <br /> Guarantee <br /> The manufacturer of the sewage treatment plant shall guaranteo the plant to perform <br /> to the efficiency rating indicated for the plant, when treating normal domestic <br /> sewage. This guarantee applies only if the plant is maintained, serviced and <br /> operated as outlined in the instruction manual. <br /> Service Schedule <br /> 1. The manufacturer shall provide a start-up service with instructions to the <br /> operator in the proper operation and maintenance of the plant. <br /> 2. A service recheck shall be made of the plant after the process maturity has <br /> been achieved, when the mixed liquor suspended solids concentration is about <br /> J 2500 mg/l. <br />