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1 <br /> ( January 14, 1998 <br /> Project No. G95103A <br /> � <br /> � IV. DESIGN RECOD4MENDATIONS <br /> I14.0 INTRODUCTION <br /> � Our exploration indicates that, from a geotechnical standpoint, the parcel is suitable for the <br /> proposed development provided the risks discussed are accepud and the recommendatior�s <br /> � contained herein aze properly followed. The bcaring stratum is relatively shallow and spread <br /> footing foundatioas may be udlized. Consequendy, foundations beazing on the medium dense to <br /> very de.�se or hard natural soils. or on structural fiil placed over these materials, will be capable <br /> of provi6ing suitable building support. <br /> i <br /> � 15.0 SITE PREpf4RATION <br /> � Site preparation of planned building and road/pazking areas should include removal of all tras, <br /> brush, debris and any other deleterious material. Addidonally, the upper organic topsoil should <br /> be removed and the remaining roots grubbed. Areas where loose su�cial soils exist due to <br /> l grubbing o,perations should * `�ered as fill to the depth of disturbance and treated as <br /> subseque�l�• recommended for structural fill placemcnt. Any buried utilities should be removed <br /> or relocarcd .f they aze under building azeas. <br /> lLoose sands should be stripped down to the underlying medium dense w very dense natural sands <br /> or hard silt sediments. Since the densiry of tt►e soil is variable, random soR pockets may exist and <br /> � the depth a� eatent of stripping can best be determined in the field by the geotechnical eagi�er <br /> or engineering geologist. In the upland portions of the site this depth was generally found to occur <br /> at approximately 1 to 3 fat. Somewhat tlucker accumulations of loose colluvi^I sedime�s should <br /> � be expected on the sloping portions of the site such as wiUan tne drainage ravines proposed for <br /> filling in the westem portion of the sire. We recomme� that road and pazldng areas be <br /> proofrolled with a loaded dump truck to identify any soft spou; soft areas should overexcavaud <br /> � and bacl�illed with strucntral fill. ' <br /> � 15.1 Temnorarv Cut Slones <br /> In our opinion, stable construction slopes should be the reccponsibiliry of the cor,tractor and s6ould <br /> ( be determined during constcucdon based on the condifions e�ountered at that time. For <br /> estima�ing purposes, however, we andcipau that temporary, unsuppocted cut slopes in ttx medium <br /> dense n�tural sandy sediments shou:d not exceed a maximum slope of 1.SH:1V <br /> � (Horizontal:Vertical). Temporary cuu in the natural dense to very dense sands or hard silt soils <br /> should not exceed a maximum slope of 1H:1V. <br /> I <br /> 14 <br /> l <br />