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ADVANCED EARTH SCIENCES — FOOTHILL SANITARY LANDFILL <br />MULTI4NTERFACE DIRECT SHEAR TESTING (ASTM D 6243) <br />Upper Shear Box: Foundation soil compacted to approximately 90% of max dry density at OMC + 4% (yd,. = 98.5 pcf, OMC = 23.0%) against <br />Bentoliner NWL45 GCL (Roll ##502252261, peel = 48.6 lbs for tests #6A, 613 & 6C; Roll #502252383, peel = 53.6 lbs for tests #6D & 6E ) with non heat -burnished side down against <br />GSE 60 -mil B/B textured HDPE geomembrane (#108181768) <br />Lower Shear Box: LCRS Gravel <br />8000 <br />6400 <br />a 4800 <br />3200 <br />1600 <br />0 <br />0.0 <br />4A 4B 4C <br />4D 4E 4F <br />"Isolated" interface test #4F: <br />GCL #502252263/GM <br />Peel = 47.5 lbs <br />GCL internal failure <br />0.8 1.6 2.4 <br />Displacement (in.) <br />co <br />c <br />d <br />7., <br />1.7VVV <br />12000 <br />9000 <br />6000 <br />3000 <br />0 <br />Shear Strength S a R2 <br />Parameters(2) (deg) (psf) <br />Peak <br />LD <br />O Peak E3 LD <br />8 <br />0 <br />0 <br />0 ❑ ❑ <br />❑ ❑ ❑ <br />3.2 0 3000 6000 9000 12000 15000 <br />Normal stress (psi) <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 />Soakingin <br />Stress <br />s <br />Distilled Water <br />Time <br />our <br />Consolidation LCRS Gravel <br />Stress Time yd a)i wf <br />s hour c % % <br />Yd <br />c <br />Foundation Soil <br />w; wf <br />% % <br />GCL <br />w; wf <br />% % <br />Shear Strength <br />TP TLD <br />s s <br />Failure <br />Mode <br />4A <br />12 x <br />20 <br />10ou <br />16 <br />4B <br />12 x 12 <br />4000 <br />0.04 <br />125 <br />20 <br />4000 <br />16 <br />88.2 <br />27.7 <br />87.5 <br />2386 1527 <br />4C <br />4D <br />12 x 12 <br />12 x 12 <br />6000 <br />8000 <br />0.04 <br />0.04 <br />125 <br />125 <br />20 <br />20 <br />6000 <br />8000 <br />16 <br />16 <br />88.8 <br />88.7 <br />26.8 <br />26.9 <br />80.1 <br />65.5 <br />3448 1811 <br />4293 2195 <br />(2) <br />4E <br />12 x 12 <br />12000 <br />0.04 <br />125 <br />20 <br />12000 <br />16 <br />88.9 <br />26.6 <br />63.2 <br />5971 2391 <br />4F <br />12 x 12 <br />12000 <br />1 0.04 <br />125 <br />20 <br />12000 <br />16 <br />59.7 <br />5478 1575 <br />NOTES: <br />(1) Sliding at the interface between the LCRS gravel and geomembrane. <br />(2) Sliding at the interface between the non heat- treated side of GCL and geomembrane. <br />(3) Sliding at the interface between the non heat- treated side of GCL and geomembrane, and within GCL (partial internal failure). <br />DATE OF REPORT: <br />7/6/2015 <br />B -4a <br />'GI14012 <br />