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<br />, <br />, <br />! . <br /> <br />I <br /> <br />The influent BOD loading based on 0.20 Ib BOD per capita is 65 Ibs/day <br />initially and 90 Ibs/day by year 2000. Using a maximum influent loading of <br />35 Ibs BOD/lOoo cu. ft. would give an aeration unit size of 2, 500 cu. it. How- <br />ever, to meet the more stringent requirements and without recirculation from <br />the second cell of the lagoon, a 15 day retention is required or a volume of <br />540,000 gallons, or 72,000 cu. ft. Using a 10 ft. depth, the area for the <br />aerated cell is 7,200 sq. ft. or a pond about 84 it. square for one cell. Using <br />air diffusion in this cell will give about 95% BOD removal resulting in about <br />.3 Ib BOD/day in the effluent to the second or pc-lishing pond. <br /> <br />The second cell, also of 15 days retention, has a loading less than <br />0.06 Ib BOD/1000 cu. ft. Minor aeration in this pond should be provided to <br />maintain an open air-water surface interface. The combined ponds require <br />0.9 acres. <br /> <br />A small package plant would require about 0.3 acres of land with its <br />accompanying retention pond. <br /> <br />Effluent Discharge <br /> <br />For both cases, lagoon or package plant, the effluent is to be chlorinated <br />and discharged to Raton Creek. <br /> <br />Plant Site Location <br /> <br />The site location for the treatment facility will depend on the use of <br />lagoons or a package plant installation. <br /> <br />The use of a two cell lagoon requires O. 9 acres and therefore the land <br />area limits site selection to an area downstream of Greekville. On Drawing <br />No. I, this is shown as site selection No.1. This site has the advantage of <br />serving the total Starkville area. It is on the west side of the railroad and out <br />of the Raton Creek flood plain. <br /> <br />Site selections 2 and 3 will serve only the town of Starkville using a small <br />package plant and retention pond. Both sites can be protected from the flood <br />plain with minor dyking. Neither site is in the main stream flow channel. <br /> <br />It is recommended that Site 1 be selected as the treatment site. This <br />site will of course depend on the agreements reached between the town of Stark- <br />ville and Greekville residents for a combined treatment system. At this time <br />the Greekville residents have not been approached for inclusion in the overall <br />sewage project. The cost analysis defines costs for Starkville only and combined <br />with Greekville. <br /> <br />- 9 - <br />