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J. H. KLEINEELDER & ASSOCIATES File No. S-2282-1 February 9, 1978 PAGE THREE FIELD EXPLORATIONS The field explorations for this project were performed on January 20, 1978, and consisted of drilling and sampling five test borings . The approximate locations at which the borings were made are shown on the Site Plan, Plate I. All borings were drilled with truck mounted 6-inch diameter auger-type drilling equipment. Relatively undisturbed core samples were collected by driving a 2-inch inside diameter sampler into the soil using a 140-pound- hammer falling 30 inches ±. The number of blows required to advance the sampler one foot into the soil are noted on the Logs of Borings at the corresponding sample locations . All borings were drilled under the direction of an engineering geologist from our firm, who classified the soils and maintained a continuous log of the soils encountered in the borings . SOIL CONDITIONS The surface soils encountered at the locations explored consist of a grey-brown to brown silty fine sand. This soil is loose and extends to depths varying from 4 to 8-1/2 feet below the existing ground surface. The surface soil is underlain by silty and clayey sand with interbedded sandy silts to the total depth explored of 30 feet in the test borings . These soils are generally medium-dense or stiff. A medium-dense clean fine to medium sand was encountered between 6 to 11 feet at Boring Nos . 4 and 5, and between 8 to 15 feet in Boring No. 1. Ground water was encountered at approximately 14 feet below the ground surface in Boring No. 1. However, ground water was not encountered in the remaining borings . It appears that the water encountered in Boring No. 1 is perched water. San Joaquin County ground water maps for Spring 1977, indicate a ground water elevation of -10 feet, or approximately ± 30 feet below the existing ground surface at the site . It is possible that the ground water