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J. H. KLEINFELDER & ASSOCIATES <br /> File No. S-2568-4 <br /> October 11, 1983 <br /> Page 3 <br /> consisted of the drilling and sampling of one test boring to a depth of 10 feet below <br /> the existing ground surface. The boring was drilled with truck-mounted drill equipment <br /> using 6-inch diameter continuous-flight auger to extend them. Disturbed samples of the <br /> soils encountered were obtained for visual examination and classification, and <br /> laboratory testing. A continuous log of the soils encountered in the boring was <br /> maintained. <br /> SOIL CONDITIONS <br /> The surface soils encountered at the locations explored consist of dark-brown silty <br /> clay. These clay soils are medium-stiff and extend to depths of approximately 3 feet. <br /> The dark-brown silty clay soils are underlain by stiff tan silty clay with varied <br /> amounts of sand. These soils extend to the maximum depths explored of 10 feet below <br /> existing ground surface. <br /> Free groundwater was encountered in the test boring at 9 feet below the surface. <br /> However, it is possible that changes in groundwater conditions .could occur at the site <br /> in the future due to variations in rainfall, groundwater withdrawal, construction <br /> activities, or other factors not apparent at the time our boring was drilled. <br /> The above is a general summary of the soil and groundwater conditions <br /> encountered in the exploratory boring drilled. More detailed descriptions of the soils <br /> encountered in the boring are noted on the Log of Boring, Plate Hl. All soils have <br /> been classified according to the Unified Soil Classification System, which is described <br /> on Plate H. <br /> LABORATORY TESTS <br /> Laboratory tests were performed on selected sample3 obtained from the exploratory <br /> boring in order to evaluate the strength, density, and expansion characteristics of the <br />