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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 />Transport Tire, Inc. <br /> <br />-9- <br /> <br />Harch 1, 1983 <br /> <br />Risk of Greater Than Typical Settlement (More Than 3/4 of an inch Total <br />Settlement) <br /> <br />Alternative 1 - DensHy the foundation base with a vibratory <br /> <br />sheepsfoot roller and place the footings on the existing fill <br /> <br /> <br />The top 2 ft of the foundation base surface should be compacted <br /> <br /> <br />to at least 95% of ASTM D-15S7 maximum dry density. Since <br /> <br /> <br />additional uncompacted fill materials may exist below fill <br /> <br />materials which have been compacted at the foundation base <br /> <br />surface, the potential for total settlement greater than 3/4 of <br /> <br />an inch for differential settlement still exists. We, therefore, <br /> <br /> <br />recommend if this method is used, that the footings and. <br /> <br />foundation walls for this structure be constructed of.reinforced, <br /> <br /> <br />cast-in-place concrete rather than masonry block~ The additional <br /> <br />stiffness afforded by cast-in-place concrete may be necessary to <br /> <br />bridge over areas of looser or soft soils. The risk <br /> <br />of a settlement greater than . typical occurs wi th this <br /> <br />alternative, possibly with total settlement in the range of 1 to <br />2 inches, with differential settlement on the order of one half <br />(1/2) of the amount. <br /> <br />Alternative 2 - Subcut or excavate the existing fill 2 ft below <br /> <br />the base of footings in the footing areas, compact the excavation <br /> <br />base surface and recompact the replaced fill. The surface of the <br /> <br />STS Consultants, Ltd. <br />