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APPFI~IDIX B <br />• <br />LABORATORY INVFSrIGATICN <br />The purpose of the laboratory investigation was to study the <br />enyineering characteristics of the materials obtained in the <br />exploratory test holes in order to determine parameters for design. <br />This Appendix includes a discussion of the test procedures and figures <br />and tables presenting the actual test results on the laboratory <br />investigation. <br />Samples obtained from our exploratory holes were examined and <br />classified in the laboratory by the project soil engineer. Laboratory <br />testing was performed on the samples obtained to determine their <br />classification, moisture-vol~mie change characteristics, strength and <br />• corrosivity. The results of the laboratory testing are shown on <br />Figs. B-1 through B-19 and on Table I. A discussion of the laboratory <br />testing procedures utilized is presented below. The testing was <br />conducted in general accordance with test procedures of the American <br />Society of Testing Materials (ASTM). <br />Index Properties: In order to identify soils and classify then into <br />categories of similar engineering properties, standard classification <br />methods have been developed. The Unified Soil Classification System <br />(ASTM D-2487) is a o~xmun method of identifying soils. This system is <br />based co index property tests, including the determination of natural <br />water content (ASTM D-2216), liquid limits (ASTM D-423), plastic <br />limits (ASTM D-424) and grain size distribution curves (ASIM D-422). <br />Results of the imisture content, dry density, Atterberg limits and the <br />• percent soil passing the U.S. No. 200 sieve ace presented in Table I. <br />