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E <br /> Project No 58080-06-01C <br /> August 31, 1994 <br />' sand layer with low cohesion was encountered underlying the interbedded clayey sands and <br /> sandy clay layers The sand layer was encountered in each of the borings and extends to a <br /> depth of approximately 41 feet bgs <br /> 1 <br /> Very stiff to hard, olive to greenish gray, silty clay and very clayey sand was encountered <br /> beneath the sand layer, extending to depths on the order of 47 to 51 feet bgs Interbedded <br /> sand and clay strata, in thicknesses ranging from 1 to 3 feet, were encountered below the silty <br /> ' clay and clayey sand layer to the maximum boring depth of 55 feet bgs Borings GB-1, GB-2, <br /> ' and GB-5 each terminated within a clay or clayey sand stratum at a depth of 55 feet bgs <br /> Borings GB-3 and GB-4 both were terminated within a sand layer with low cohesion at depths <br /> of 51 5 and 50 feet bgs, respectively Refusal of the continuous core barrel was encountered <br /> within the sand layer at the bottom of boring GB-3 at 51 5 feet bgs A generalized cross- <br /> section of the geologic conditions encountered in borings GB-2, GB-3, and GB-5 is depicted <br /> in Figure 5 <br /> Groundwater was not encountered during the drilling activities although very moist to wet soil <br /> ' conditions were encountered at depths below 50 feet bgs <br /> - 28 - <br />