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CCP 01-23-2006
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CCP 01-23-2006
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5/8/2007 1:21:14 PM
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11/14/2006 4:41:45 PM
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<br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br /> <br />RECOMMENDATIONS <br /> <br />1) Site Location and Condition <br /> <br />A security fence around the immediate tank site should be considered to reduce <br />the chance of contamination of the tank contents or vandalism. The cost of this <br />fence (100' x 100' - 8' high) along with two access gates should not exceed <br />$24,300. <br /> <br />The ground around the tank's foundation should be graded so that the foundation <br />projects 6 inches above grade with the slope of the grade away from the <br />foundation. Areas with less than 6 inches of foundation projection adjacent to <br />concrete sidewalks do not require grading repair. The cost of this alteration <br />should not exceed $2,200. <br /> <br />2) Foundation <br /> <br />The foundation was in good condition overall. The minor crack and pop-out <br />should be considered normal for a tank of its age. As further degradation is not <br />expected these items do not require repair. <br /> <br />3) Exterior Coating <br /> <br />The exterior coating was in good condition overalL All areas of localized <br />corrosion should be spot repaired in conjunction with the interior coating work. <br />Specifications should require surface preparation in accordance with SSPC-SP 3 <br />"Power Tool Cleaning" followed by two coats of an acrylic coating. The power <br />tools used (e.g. needle gun, roto-peen, etc.) should be equipped with vacuum <br />shrouds which would significantly reduce the containment requirements, <br />Utilizing the shrouds, the only additional containment needed would be tarps <br />placed upon the ground to catch inadvertent releases of paint debris. KTA's <br />opinion of probable construction cost for spot repairs to the tank exterior should <br />be approximately $13,500. <br /> <br />If aesthetics are particularly important the tank could be overcoated. The surface <br />preparation if overcoating is desired, specifications should require pressure <br />washing all exterior tank surfaces in accordance with SSPC-SP 12, WJ-4 to <br />remove dirt, debris, and chalking prior to the application of an epoxy penetrating <br />sealer and urethane finish coat. The existing exterior coating is a urethane, which <br />often requires mechanical sanding in addition to pressure washing to insure <br />coating performance. Therefore, the cost to overcoat the tank exterior is <br />substantial (approximately $98,000) and is not required at this time. <br /> <br />Care should be taken during any exterior painting to avoid overspray or paint <br />drips onto the cars in the parking lots adjacent to the tank site. <br /> <br />Elevated Water Storage Tank <br />City of Arden Hills South Tank <br /> <br />34 <br />
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