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De-Chlorine Chamber Volume 374 gallons Overall Length/Width/Height 45.25' x 10' x 11' Materials of Construction: All tank vessels will be fabricated of%" structural grade ASTM designated A-36 steel plates. All walls will be continuous and watertight and will be supported by structural reinforcing members where required. Fabrication and erection would conform to the appropriate requirements of "AISC Specifications for Buildings". Connections will conform to the requirements of the American Welding Society's Code and will develop the full strength of the member. All piping within the plant will be Schedule 40 steel pipe. All vessel surfaces to be painted will be properly prepared in a workmanlike manner so as to obtain a smooth, clean and dry surface. All rust, dust and mill scale, as well as other extraneous matter, will be removed by cleaning by wire brushing or whatever means necessary. All interior surfaces will be blasted to a SSPC-SP10 and all exterior surfaces will be blasted to a SSPC-SP-6 finish. Interior and exterior surfaces will be painted with 8-10 mils of a black coal tar epoxy coating, Tnemec 46-H-413 o/e. Equalization Chamber: The chamber will include an inlet bar screen, and a duplex set of equalization pumps. Liquid level sensors will regulate the pumps and blower/motor unit. Controls will be provided in the plant control panel. The pumps will be rated 2 HP, 230 volt, 1 phase and 60 Hertz. An emergency overflow will be provided between the equalization and aeration chamber. Flow control will be accomplished by pumping plant influent to a flow control box containing an adjustable overflow broad weir and a V-notch discharge weir. The overflow broad weir will be adjustable so that a measured amount of pumped influent will discharge through the V-notch weir to the anoxic chamber, while overflowing the remaining pumped influent into the equalization chamber. Sludge Holding Chamber: The chamber will be of the aerated type. Diffused air will be supplied by the plant blower system supplying 30 CFM of air per 1,000 cubic feet of volume. The diffusers will be located parallel to and near the bottom of the tank. All piping and valves within the chamber will be factory installed. Anoxic Chamber: The chamber volume will be based on 25% of the average daily flow. The chamber will include a mixing pump (minimum of 0.5 HP/1,000 cubic feet). The pump will be rated at Page 4 of 11