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File No. 20-3445-0- KLEINFELDER <br /> March 4 , 1991 <br /> The tests consisted of Moisture Content and Dry Density <br /> Determinations, a Direct Shear and a No. 200 Wash. <br /> The results of the Moisture Content, Dry Density Determinations and <br /> No. 200 wash are noted on the Logs of Borings at the corresponding <br /> sample locations. The results of the Direct Shear test are <br /> presented on Plate A-5 . <br /> CONCLUSIONS AND RECOMMENDATIONS <br /> Foundations <br /> We recommend that the structure be supported on spread or <br /> continuous foundations bearing on the existing soils or on <br /> Engineered Fill . We recommend that foundations for the single- <br /> story structure extend a minimum depth of 18 inches below the <br /> lowest adjacent finished soil subgrade, interior or exterior, <br /> whichever controls. In order to provide more uniform support to <br /> the foundations, we recommend the loose soils exposed in the <br /> foundation excavations be hand compacted prior to placing <br /> reinforcing steel . Any loose soil pockets or debris encountered <br /> during foundation excavations should be overexcavated and <br /> recompacted as described in the "Site Preparation and Grading" <br /> section of this report. <br /> With these provisions, we recommend an allowable bearing pressure <br /> of 2 , 000 pounds per square foot (psf) for dead plus live loads be <br /> used in design. This value can be increased by 1/3 for the total <br /> of all loads, including wind and seismic forces. The recommended <br /> minimum width of foundations is 12 inches. The anticipated total <br /> settlement is less than 1/4-inch. The majority of this settlement <br /> should occur during construction as building loads are placed. <br /> We recommend that the reinforcing design of the foundations be <br /> provided by the structural engineer. We note that the above- <br /> Copyright 1991 Kleinfelder, Inc. <br /> 4 <br />