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Griffin Realry SA, Inc.-Geotechnical Investigation <br />Inw/Crandall Project 70131-7-0261.0001 <br />July 7,1997 <br />Direct shear tests were performed on selected undisturbed samples to determine the strength of the <br />soils. The tests were performed at field moisture content and after soaking to near-saturated <br />moisture content and at various surcharge pressures. The yield-point values determined from the <br />direct shear tests are presented in Figure A-3, Direct Shear Test Data. <br />Confined consolidation tests were performed on two undisturbed samples to determine the <br />compressibility of the soils. Water was added to one of the samples during the tests to illustrate the <br />effect of moisture on the compressibility. The results of the tests are presented in Figures A-4, <br />Consolidation Test Data. <br />The optimum moisture content and maximum dry density of the upper soils were determined by <br />performing a compaction test on a sample obtained from Boring 1. The test was performed in <br />accordance with the ASTM Designation D1557-91 method of compaction. The results of the tests <br />are presented in Figure A-5, Compaction Test Data. <br />In addition to the normal consolidation tests, a "quick" consolidation test was performed on an <br />undisturbed sample to determine the hydroconsolidation potential of the soils. The test was <br />performed by confining the sample under a normal surcharge pressure, allowing the sample to <br />consolidate at its field moisture content, and then saturating the sample and measuring the <br />consolidation resulting from the addition of water. The results (percent hydroconsolidation) of the <br />test are presented in Figure A-6, Hydroconsolidation Test Data. <br />4 <br />A-2