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KLEINFELDER <br /> File No. 20-2662-06 <br /> January 24, 1990 <br /> foot deep percolation test hole was drilled at each of the 7I <br /> lots . The soil boring and percolation test holes were drilled, <br /> using a truck-mounted drill rig equipped with a 6-inch diameter, <br /> continuous flight auger. A continuous log of the soil conditions <br /> encountered in the soil boring was maintained by a representative ) <br /> of our firm. Each percolation test hole was cased with PVC pipe) <br /> for later percolation testing. The approximate locations at,i <br /> which the soil boring and deep percolation test holes were <br /> drilled are shown on Plate I of this report. <br /> In general, the soil conditions encountered in the soil boring <br /> consisted of approximately 2 feet of brown-grey silty clay near) <br /> the surface overlying tan sandy and clayey silts that extended to <br /> the maximum depths explored. An exception was an approximately 4 <br /> foot thick layer of silty sand encountered at a depth of 22 feet. <br /> No free groundwater was encountered to the maximum depth explored <br /> of approximately 50 feet below existing ground surface. It is <br /> possible however, that groundwater conditions at the site could <br /> change at some time in the future due to variations in rainfall, <br /> groundwater withdrawal, construction activities, irrigation, or <br /> other factors not apparent at the time our boring was drilled. <br /> The above is a general summary of the soil and groundwater <br /> conditions encountered in the soil boring drilled. More detailed <br /> descriptions of the soil conditions encountered in the soil <br /> boring are presented on the Log of Boring, Plate III . All soils <br /> have been classified according to the Unified Soil Classification <br /> System which is described on Plate II . <br /> 2 <br />