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L <br />• SUBSURFACE CONDITIONS <br />1_. <br />The general subsurface conditions at the subject site were explored by drilling 23 auger <br />and rotary borings at the locations shown on Fig. I. The borings were advanced with a CME- <br />45B drill rig on an all-terrain crawler chassis, typically utilizing 4-inch diameter, continuous <br />flight auger. Some of the deeper borings were started .with either solid or hollow stem augers <br />and completed with 3-7/8-inch rotary or NXWL diamond coring methods. The boring locations <br />wets; selected by us and located in the field by pacing from site features shown on the plan <br />provided. Graphic logs of the borings are presented on Figs. 3 through 6, with notes related <br />to the field investigation and descriptions of the soils given on Fig. 7. Sample recovery was by <br />lined, modified California spoon (2.5-inch O.D., 2.0-inch I.D.) driven by a 140 pound hammer <br />falling through 30 inches in substantial accordance with ASTM D1586, "Standard Penetration <br />• Test." The penetration resistance blow counts for the modified California sampler were also <br />recorded, and the results are considered similar to the "Standard Penetration Test." We also <br />recovered some bulk, disturbed samples of cuttings from selected borings, as well as rock core <br />from other borings. Three of the deeper borings were completed as slope inclinometers. <br />Laboratory tests were made on selected samples from the borings to evaluate their general <br />engineering properties. A summary of the laboratory tests are presented on Table I and on the <br />Boring Logs. Results of the swell-consolidation tests are presented on Figs. 8 through 13. <br />Results of a laboratory resistivity test are presented on Fig. 14, and results of triaxial shear tests <br />are presented on Figs. 15-18. The testing was performed in general accordance with ASTM or <br />other generally recognized procedures. <br />. 8 <br />