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CASCADE GEOTECHNICAL <br /> October 28, 7985 <br /> Cert. No. 8510-14G <br /> Skippers Inc. <br /> Page 3 <br /> some gravel and ra.nged from medium dense to very dense. The very <br /> dense, silty sands were found at depth in all cest pits and are be- o <br /> � <br /> lieved to underLie the whole site. m <br /> Very stiff , sandy silt was found only in test pit 2, from beneath � �, <br /> the pavement. section to a depth of four (4) feet. '" "i <br /> �m <br /> 0 <br /> co <br /> mo <br /> All the native soils appear to have been deposited during the last �4 <br /> 03 <br /> glaciatinn. The very dense, gravelly, silty sand is a lodgement � _ <br /> s -� <br /> till an.d the other materials were pcobably deposited during the '^ ,. <br /> oa <br /> c <br /> melting of the ice. � _ <br /> «,.. <br /> -i N <br /> � <br /> No seepage was encountered and all soils were damp or moist . The o p <br /> �n <br /> very dense, gravelly, silty sand and the sandy silt are quite im- � m <br /> x <br /> permeable, the medium dense , gravelly, silty sand is moderately '^� <br /> 0 <br /> permeable and the gravelly sand is very permeable. � m <br /> c �n <br /> 3 N <br /> m <br /> T� <br /> CONCLUSIONS AND DESIGN PAkAMF,TERS � m <br /> a <br /> z <br /> -� <br /> We find the site to be well suited to the proposed development . D <br /> z <br /> Soil loading parameters are presented below. Since the soils at � <br /> x <br /> this site are moisture sensitive, dry season construction is advis- ;r <br /> z <br /> ed. � <br /> � <br /> � <br /> m <br /> Bearing Values <br /> The near-surface, native soils at this site are suitable for the <br /> support of spread footing foundations designed using a maximum safe <br /> bearing value of 3000 psf . The deeper , very dense, gravelly, silty <br /> sand is suitable for loading of 4000 psf. If footings are to be <br /> - placed on structural fill, we recommend a maximum safe bearing <br />