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File No. 20-3445-0y KLEI �, EELDER <br /> March 4 , 1991 <br /> by a representative of our firm who assisted in obtaining <br /> relatively undisturbed soil samples for visual examination, <br /> classification, and laboratory testing. Soil samples were obtained <br /> by driving a 2-inch inside diameter sampler into the soil using a <br /> 140-pound hammer falling approximately 30 inches. The number of <br /> blows required to advance the sampler is presented on the Locs of <br /> Borings, Plates A-3 and A-4 , at the corresponding sample locations. <br /> SOIL CONDITIONS <br /> The surface and near-surface soil conditions encountered at the <br /> locations explored consisted of medium dense silty sand that <br /> extended to depths of approximately 7 to 10 feet below the ground <br /> surface. Below these surface soils, silty and clean sands were <br /> encountered to the maximum depths explored. <br /> No free groundwater was encountered in either of our test borings. <br /> It is possible however, that groundwater conditions at the site <br /> could change at some time in the future due to variations in <br /> rainfall , groundwater withdrawal , construction activities or other <br /> factors not apparent at the time our test borings were drilled. <br /> The above is a general summary of the soil and groundwater <br /> conditions encountered in the test borings drilled for this <br /> investigation. More detailed descriptions of the soils encountered <br /> in each boring are noted on the Logs of Borings. All soils have <br /> been classified according to the Unified Soil Classification <br /> System, described on Plate A-2 . <br /> LABORATORY TESTS <br /> Laboratory tests were performed on selected samples obtained from <br /> the exploratory borings in order to evaluate the moisture, density, <br /> strength and gradation characteristics of the soils encountered. <br /> Copyright 1991 Kleinfelder, Inc. <br /> 3 <br />