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�� Page 9 - #4220 91-1043 <br />" After completion of excavation, planned building grade can be re-established with <br /> placement of a well-compacted granular fill. The fill should consist of a granular soil <br /> free of organic debris and other rubble. Fill should be placed in thin lifts and <br />�' compacted to a minimum of 98% of the Standard Proctor density (ASTM:D 698). <br /> If groundwater enters the excavation, the fill used up to an elevation at least 2' above <br />-- the water should consist of a free-draining sand-gravel containing less than 10% material <br /> finer than a #200 sieve. <br /> -- Based on our observation of the samples of the presently in-place fill, it is our opinion <br />; these soils will probably not be suitable for reuse within the compacted fill system. <br />� 3.3 Foundation Recommendations <br />` By following the previously recommended earthwork procedures, it is our opinion the <br />`., building can be supported on conventional spread footings. The exterior wall foundation <br /> should be placed at a minimum frost depth (42" below planned exterior grade). <br /> _ Based on the recommended compaction level, and the strength characteristics of the <br /> softer portions of the fine alluvium and weathered till, we recommend the foundations <br />~ be designed .for a maximum allowable soil bearing pressure of 2000 ps£ The <br />� recommended soil bearing pressure provides a theoretical factor of safety of at least <br /> three against general shear failure. Further, it is our judgment total foundation <br />} ' <br />