9 First American Way - Soils Report

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Lutzky Associates Development. LP - Geotechnical Investigalion MACTEC Project 4953-03-2631 September 18,2003 APPENDIX A EXPLORATIONS AND LABORATORY TESTS EXPLORATIONS We explored the site for the proposed project by drilling three boring to depths ranging from 60 to 75 feet below the existing grade using 5-inch-diameter rotary wash-type drilling equipment. The location of boring is shown on Figure 2.2, Boring and CPT Location Plan. The soils encountered were logged by our field technician, and undisturbed and bulk samples were obtained for laboratory inspection and testing. The log of the current boring is presented in Figures A-1.1 through 1.3; the depths at which undisturbed samples were obtained are indicated to the left of the boring logs. The number o f blows required to drive the Crandall sampler 12 inches using a 140 pound hammer falling 30 inches is indicated on the logs of the current borings. The soils are classified in the accordance with Unified Soil Classification System as described on Figure A-2. CONE PENETRATION TEST To obtain data for evaluating the liquefaction potential of the soils underlying the site and to aid in developing foundation recommendations, we retained Kehoe Testing and Engineering to perform three cone penetration tests at the site at the locations shown on Figure 2.2. The results of the CPTs are presented in Appendix B. LABORATORY TESTS Laboratory tests were performed on selected samples obtained from the borings to aid in the classification of the soils and to determine their engineering properties. The field moisture content and dry density of the soils encountered were determined by performing tests on the undisturbed samples. The results of the tests are shown to the left of the boring logs. A-1