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APPENDIX B <br />LABORATORY TESTING <br />PROPOSED ACCESSORY DWELL ING UNIT <br />lU1 South Dennis Streel <br />SA'VIA A/VA, C ALIFORNI A <br />Laboratory tests were performed on selected samples to assess the engineering properties and <br />physical characteristics of soils at the site. The following tests were performed: <br />o moisture content and dry density <br />. direct shear <br />. No. 200 Wash <br />o Atterberg limits <br />. corrosion potential <br />Test results are summarized on laboratory data sheets or presented in tabular form in thrs <br />appendix. <br />Moisture Density Tests <br />The field moisture contents. as a percentage of the dry weight of the soils. were determined by <br />weighing samples before and after oven drying. The dry density. in pounds per cubic foot, was <br />also determined fir all relatively undisturbed ring samples collected. These analyses were <br />performed in accordance with ASTM D 2937. The results ofthese determinations are shown on <br />the boring log in Appendix A. <br />Direct Shear <br />Direct shear tests were performed on undisturbed samples of on-site soils. A different normal <br />stress was applied vertically to each soil sample ring which was then sheared in a horizontal <br />direction. The resulting shear strength for the corresponding normal stress was measured at a <br />maximum constant rate of strain of0.005 inches per minute. The direct shear results are shown <br />graphically on a laboratory data sheet included in this appendix. <br />B-l