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• -7- <br />required assistance by a dozer due to the steep terrain and sage- <br />brush cover. <br />The borings were advanced through the overburden soils with <br />U-inch diameter continuous flight augers. The borings were <br />logged by a representative oC Chen and Associates, Inc. <br />Samples oC the subsurface materials were taken with 2-inch <br />and 1 3/8-inch spoon samplers. The samplers were driven into the <br />various strata with blows from a 1U0-pound hammer falling 30 <br />inches. This test is similar to the Standard Penetration Test <br />described by ASTM Fiethod D-1586. Penetration resistance values <br />indicate the relative density or consistency of the subsoils. <br />DeF~th at which the samples were taken and the penetration resis- <br />tance values are shown on the Logs of Exploratory Borings, <br />Figs. 2 and 3. <br />Percolation tests were conducted in the area of the proposed <br />sedimentation pond (Flole 10). The tests were conducted in 4-inch <br />diameter auger holes at the locations shown on Fig. 1 and noted <br />as P-1, P-2 and P-;. Results of the percolation tests are shown <br />on Table II which include the depths the tests were conducted. <br />LABORATORY TESTING <br />Samples obtained from the exploratory borings were examined <br />and visually classified by the project engineer. Laboratory <br />t?sting performed on selected samples includes standard property <br />tests such as natural moisture contents and dry unit weights, <br />grain-size analyses, and liquid and plastic limits. Addition- <br />ally., swell-consolidation tests, direct shear tests and falling <br />Chen & Associates <br />