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APPENDIX <br />FIELD EXPLORATIO14S AND LABORATORY TESTS <br />FIELD EXPLORATIONS <br />The subsurface conditions at the tailings em- <br />bankment were explored by drilling four borings and by <br />excavating five test pits. The borings were drilled <br />with truck -mounted, rotary -auger drilling equipment, <br />and ranged in depth from 25 to 83 feet below the exist- <br />ing ground surface. The test pits ranged in depth from <br />13 to 14 feet below the existing ground surface. The <br />locations of the borings and test pitsare shown oil Plate <br />2, Plot Plan, in the text of this report. <br />The field exploration program was conducted <br />and supervised by an experienced Dames & Moore engineer- <br />ing geologist. The soils encountered were classified by <br />visual and textural. examination in the field, and a com- <br />plete log was maintained for each test pit and boring. <br />Relatively undisturbed and disturbed samples of the soils <br />were obtained from all of the borings and test pits. The <br />Dames & Moore soil sampler, as shown on Plate A-3, Scil <br />Sampler Type U, was used to obtain the relatively undis- <br />turbed soil samples. The terminology used to classify <br />