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ADVANCED EARTH SCIENCES - FOOTHILL SANITARY LANDFILL <br />MULTI -INTERFACE DIRECT SHEAR TESTING (ASTM D 6243) <br />Upper Shear Box: Foundation soil compacted to approximately 90% of max dry density at OMC + 4% ( yamv = 98.5 pcf, OMC = 23.0%) against <br />Bentoliner NWL45 GCL (Lot 25051211, Roll #502252263, peel = 47.5 lbs) with non heat -burnished side down against <br />GSE 60 -mil BB textured HDPE geomembrane (#108181768) <br />Lower Shear Box: LCRS Gravel <br />9000 15000 <br />7500 <br />417 <br />c 6000 <br />y <br />c _ <br />3000 <br />1500 <br />0 -f- <br />0.0 <br />0.8 1.6 2.4 3.2 <br />Displacement (in.) <br />12000 <br />Kil <br />6000 <br />Z <br />3000 <br />04 <br />0 <br />Shear Strength <br />Parameters(3) <br />-S a R2 <br />(deg) ( sf) <br />Peak <br />Consolidation in Water Lower Soil Foundation Soil GCL Shear StrengthFailure <br />LD <br />No. Size Stress <br />O Peak OLD <br />W <br />701 <br />3000 6000 9000 12000 15000 <br />Normal stress (psf) <br />Test Shear Normal <br />Shear GCL Soakin <br />in Water <br />Consolidation in Water Lower Soil Foundation Soil GCL Shear StrengthFailure <br />No. Size Stress <br />Rate Stress <br />Time <br />Stress Time ya w wf Ya G)i mf w wf TP TLD <br />Mode <br />_[,Box <br />in. x in. s <br />in./min s <br />hour <br />s hour c % % c % % % % s s <br />4F 1 12 x 12 1 12000 1 <br />0.04 1 125 <br />20 <br />16 <br />NOTES: <br />(1) Sliding initially occurred at the interface between the non heat- treated side of GCL and geomembrane, and GCL failed internally. <br />S 14010-35r.ds.xls <br />DATE OF REPORT: 6/26/2015 <br />FIGURE NO. B -4b <br />PROJECT NO. SGI14012 <br />DOCUMENT N0. <br />