R98-26 ACCEPTING THE PROPOSAL AND AUTHORIZING AN AGREEMENT

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tree removal for construction, and the proximity of the site to water m essa TIC nill l B sed upon costs associate d wit h overcommg an y c h a l l e n g e s a n d i n s t a l l i n g t h e n e ry p P � o u r fi n d i n g s, T I C will rank the sites and make recommendation for purchase contingent upon adequate soils being found. (This phase will be complete d by T I C an d C D I.) Tank Style Analysis: Prior to performing the preliminary engineering functions, TIC will develop an analysis comparing a spheroid-style tank to a fluted pedestal-style tank, and to a com- posite style tank. In addition, TIC will analyze the feasibility of constructing two lesser-sized ele- vated tanks as compared to a single, larger tank. This analysis will include a discussion on each tank's benefits and drawbacks regarding: aesthetics, surface area for painting/sealing, storage, piping requirements, head range, height, coating systems, interior and exterior surface preparation options for future maintenance, initial cost, and an economic analysis. In addition to comparing initial costs of the new tanks, TIC will provide a life cycle analysis of each tank design to deter- mine the most cost-effective tank design over the life of the tank. It is important for the City to realize that obtaining the funding for a new tank project may be far easier than for maintenance work. The grants and bonds are more readily available for new construction and are usually not as readily available for rehabilitation work. Therefore, reducing future maintenance costs for this tank should be of paramount importance to the City. Also included in this life cycle analysis would be cost considerations for different coating systems. The City should be aware that the cost of the paint supplied for a tank painting project is typically less than 2% of a new tank project costs. This is the reason that cost analysis of alternative coat- ing systems proves that the BEST possible coating system should always be specified for a coat- ing project. This is especially true for this project, as any disruption to the neighboring property owners should be as minimal as possible. Continued utilization of a coating system that offers only five or more years of service life each time could mean skipping several paint cycles over the life of the tank, thus limiting disruption to the present and future neighbors to the tank site. De- signing a long-life coating system will pay back the City time and time again over the life of the coating system. (This phase will be completed by TIC.) Site Survey: A site survey and development of a site plan are necessary to allow tank con- tractors to competitively bid the project. The information included on the site plan is the existing physical features on the site and the proposed tank locations. Finally, the necessary elevations will be determined to provide benchmarks for construction of the new tank. �This phase will be com- pleted by CDI and TIC.) SitC Layout: Utilizing the site survey and other existing information, a site layout will be de- veloped. Consideration will be given to construction limitations, future maintenance require- ments, and the possibility of construction with one tank remaining in service at each site. This consideration would include locating the tank to allow adequate "lay-down" area for sub- assemblies during tank erection as well as positioning the tank to facilitate future tank mainte- nance work. In addition, avoiding underground and overhead utilities is imperative. Utilities that _ interfere with this project will be relocated. The optimal utilization of the site is paramount to successfully completin�this tank project and the futureUt I k maintenance which will inevitably be necessary. (This phase will be completed by TIC and C ) 3-4