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A-1 <br /> b <br /> EXHIBIT A <br /> t FIELD AND LABORATORY INVESTIGATIONS <br /> _4 <br /> Field Investigation <br /> The field investigation consisted of a surface reconnaissance <br /> and a. subsurface exploratory program. On October 6 , 1980 , <br /> three .exploratory pits were advanced. The test pit locations <br /> are shown on Drawing 1. <br /> The soils encountered were loggedIn the field during the <br /> exploration and with supplementary laboratory test data are <br /> described in accordance with the Unified Soil Classification <br /> System. <br /> A penetration test was performed at selected depths . Relatively <br /> undisturbed soil samples are obtained while performing this <br /> test. Additional bag samples of the disturbed soil were ob- <br /> tained from the auger cuttings. All samples are returned to <br /> our laboratory for evaluation. <br /> Laboratory Investigation <br /> The laboratory investigation was programmed to determine the <br /> physical and mechanical properties of the foundation soil under- <br /> lying the site. Test results were used as criteria for determin- <br /> ing the engineering suitability of the surface and subsurface <br /> materials encountered. <br /> In-situ moisture content; dry density, unconfined compressive <br /> strength and Atterberg Limits were determined for the undisturbed <br /> samples representative of the. subsurface material. These tests, <br /> supplemented by visual observation, comprised the basis for our <br /> evaluation of the site material. <br /> The logs of the exploratory borings and laboratory determinations <br /> are presented in this Exhibit. <br /> I <br /> i <br /> 1 <br /> 1 <br /> 1 . <br />