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<br /> Operating and maintenance costs will also be prepared. This informa- <br /> t ion will be used to prepare a tabulation of present worth costs for <br /> financial comparison of the few best alternatives. The level of cost <br /> detail will only be sufficient to allow realistic comparison of alter- <br /> na tives. <br /> Task 450. Assess Environmental Effects of Alternatives. <br /> - <br /> The beneficial and detrimental short- and long-term effects <br /> of each of the "few best" alternatives will be described in sufficient <br /> detail to allow subjective ranking. Included in these descriptions <br /> will be historic, scenic, archaological air pollution, endangered <br /> species, receiving water quality, and water supply aspects. <br /> Task 460. Evaluate Implementability of Alternatives. <br /> Implementability of each alternative will be discussed from <br /> practical, polt tical, institutional, financial, and legal aspects. <br /> Sufficient detail will be given to allow a subjective ranking of <br /> alternatives from this point-of-view. <br /> Task 470. Evaluate Socia-Economic Effects of Alternatives. <br /> - <br /> Differences in socia-economic effects between alternatives <br /> will be described in sufficient detail to allow a subjective ranking <br /> of alternatives from this point of view. <br /> Task 510. Document Ranking Methodology. <br /> The methodology to be used in providing a preferential <br /> ranking of the few best alternatives will be written up for review by <br /> interested parties. To minimize subjectivity, the methodology will <br /> include: <br /> . Selection of items of concern, including cost, <br /> environmental, etc. <br /> . Selection of a representat ive group of people to <br /> perform ranking, including City technical and <br /> managerial staff, interested citizens, and Consultants. <br /> . Ranking of "few best" alternatives. <br /> 23 <br />