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Sample Origin Gob Pile, West Elk Mine <br />Material Description Coal Waste <br />Soil Type Coal Waste <br />130 <br />120 <br />110 <br />100 <br />U <br />U) <br />H 90 <br />Z <br />W <br />O <br />r <br />8C <br />A <br />6( <br />Test By DRS <br />Test Date 4-29-09 <br />Sample # 1 <br /> <br />TEST RESULTS Sieve Percent <br /> Size Passina <br />MAXIMUM DENSITY: 70.2 <br />OPTIMUM MOISTURE: 15.7% 5" <br /> 4" <br />ROCK CORRECTION: 3„ <br />MAXIMUM DENSITY: <br />OPTIMUM MOISTURE: 2" <br /> 1 '/z' <br />TEST METHOD: ASTM D-698 B <br />PREP. METHOD: 3/4" 100 <br />HAMMER: MANUAL 1/2" 80 <br />FRACTION USED: 3/8" 3/8" 87 <br />MOLD SIZE: 4" diameter <br /> 4 54 <br /> 10 38 <br />Specific Gravity: 20 27 <br />Liquid Limit: 40 20 <br />Plastic Limit: <br />Plasiticity Index: 100 12 <br /> 200 8.5 <br /> 0.02 <br /> 0.005 <br />5 o09 <br />5( <br />10 15 20 25 30 <br />MOISTURE - % of DRY WEIGHT <br />GRAND JUNCTION <br />v, LINCOLN - DeVORE, Inc. <br />Geotechnical Consultants <br />Grand Junction, Colorado <br />35 40 <br />West Elk Mine <br />Somerset, Colorado <br />Oxbow Mining, Inc. <br />Somerset, Colorado <br />Job No. Drawn Date <br />93712-G.1 DJS 5-4-09