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ADVANCED EARTH SCIENCES - FOOTHILL SANITARY LANDFILL <br />SINGLE INTERFACE DIRECT SHEAR TESTING (ASTM D 6243) <br />Upper Shear Box: Foundation soil compacted to approximately 90% of max dry density at OMC + 4% ( Yd,,,,X = 98.5 pcf, OMC = 23.0%) against <br />Bentoliner NWL45 GCL (Lot 25051211, Roll #502252263, peel = 47.5 lbs, upper surface wetted by spraying distilled water) with heat -burnished side up against foundation soil <br />Lower Shear Box: Concrete sand <br />9000 <br />7500 <br />6000 <br />H <br />y <br />4500 <br />3000 <br />1500 <br />0 <br />0.0 <br />0.8 1.6 2.4 3.2 <br />Displacement (in.) <br />15000 <br />12000 <br />y <br />9000 <br />dr <br />a <br />7., <br />6000 <br />3000 <br />0 <br />Shear Strength <br />Parameters(2) <br />S <br />(deg) <br />a <br />sf) <br />Rz <br />Peak <br />Yd <br />c <br />Foundation Soil <br />coi cef <br />% % <br />GCL <br />wi cot' <br />% % <br />LD <br />1 <br />x <br />4 <br />16 <br />1B <br />12 x 12 <br />4000 <br />0.04 <br />4000 16 <br />88.9 <br />26.7 <br />82.3 <br />2765 2354 <br />1C <br />O Peak ❑ LD <br />6000 <br />0.04 <br />6000 16 <br />89.0 <br />26.5 <br />80.7 <br />O <br />1D <br />O <br />8000 <br />0.04 <br />O <br />88.7 <br />27.0 <br />72.0 <br />4596 791 <br />lE <br />12 x 12 <br />12000 <br />0.04 <br />12000 16 <br />89.1 <br />Shear Strength <br />Parameters(2) <br />S <br />(deg) <br />a <br />sf) <br />Rz <br />Peak <br />Yd <br />c <br />Foundation Soil <br />coi cef <br />% % <br />GCL <br />wi cot' <br />% % <br />LD <br />1 <br />x <br />0 3000 6000 9000 12000 15000 <br />Normal stress (psf) <br />Test <br />No. <br />Shear <br />Box Size <br />in. x in. <br />Normal <br />Stress <br />s <br />Shear <br />Rate <br />in./min <br />Soaking in Distilled Water Consolidation Lower Soil <br />Stress Time Stress Time Yd wi wf <br />s hour s hour c % % <br />Yd <br />c <br />Foundation Soil <br />coi cef <br />% % <br />GCL <br />wi cot' <br />% % <br />Shear Strength Failure <br />TP TLD Mode <br />s s <br />1 <br />x <br />4 <br />16 <br />1B <br />12 x 12 <br />4000 <br />0.04 <br />4000 16 <br />88.9 <br />26.7 <br />82.3 <br />2765 2354 <br />1C <br />12 x 12 <br />6000 <br />0.04 <br />6000 16 <br />89.0 <br />26.5 <br />80.7 <br />3582 615 <br />1D <br />12 x 12 <br />8000 <br />0.04 <br />8000 16 <br />88.7 <br />27.0 <br />72.0 <br />4596 791 <br />lE <br />12 x 12 <br />12000 <br />0.04 <br />12000 16 <br />89.1 <br />26.3 <br />59.2 <br />5725 969 <br />NOTES: <br />(1) Sliding (shear failure) occurred at the interface between the foundation soil heat-treated side of GCL. <br />(2) GCL internal failure. <br />(3) A straight line shear strength envelope not drawn through the test data because the interface shear failure occurred at 1000 and 4000 psf while GCL internal shear failure occurred at 6000, 8000, and 12001 <br />psf. <br />DATE OF REPORT: 5/29/2015 <br />FIGURE NO. B -la <br />PROJECT NO. SGI14012 <br />DOCUMENT NO. <br />