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i . <br /> � SN.ANNON F�WILSON.INC. <br /> can he remwed prior to paving without requiring the need for overerzcavation <br /> and addidonal fill. <br /> 8) Work areas and soil stockpiles should be cwered with plastic, and sloping, <br /> i ditching, pumping fmm sumps, dewatering and other measures should be <br /> employed as necessary to permit proper completion of the work. Bales of <br /> straw a�id geotextile silt fences should be used as appropriate to control soil <br /> � erosion. <br /> 9) Excavation and placement of fill should be observed on a full-dme basis by a <br /> ! person experienced in wet weather earthwork to determine that it is being <br /> accomplished in a proper manner. <br /> I8.4.7 Permanent Sloceg <br /> iWe recomniend that permanent cut and fill slopes on the upper plateau (eaccluding the <br /> east slope) be no steeper than 2H:iV for stability purposes and maintenance consideretions. <br /> � We recommend that all slopes be seeded and/or planted with relatively fast-growing <br /> vegetation to limit surface sloughing and erosion. <br /> ( 8.5 Foundation Desien <br /> IFoo6ngs should bear in competent bearing soils, defined as dense to very dense glacial till- <br /> like or till soils or stroctunl fill placed over these soils. Stripping of werlying unsuitable <br /> soils should take place to whatever depth is necessary to expose competent giacial soils, as <br /> described in Sections 8.4.2.3 and 8.4.2.4. Care should be taken to remwe all topsoil, <br /> I existing fill, unsuitable weathered native soils, and other unsuitable soils from beneath the <br /> building area. <br /> IFootings bearing in till-like soils could be designed for a maximum allowable beazing <br /> pressure of 8,000 pounds per squane foot (pstl, and those bearing in compacted structural li:l <br /> Icould be designed f�r a maximum allawable bearing pressure of 4,000 psf. Because both <br /> buildings will be c�nstructed in both a partial cut and partial fill and because it may not be <br /> ipractical to design the same building for different bearing pressures, we recommend that a <br /> maximum allowable bearing pressure of 4,000 psf be used for design. This pressure can be <br /> I increased by 33 percent for short-term wind or seismic loads. The pressures given above <br /> are contingent on the following: <br /> I W-6693-01 <br /> 23 <br />