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TRI/ENVIRONMENTAL, INC. <br /> A Texas Research International Company <br /> HOLDREGE & KULLFACE FRICTION TEST <br /> Clay Soil vs. Single-Sided Textured Geomernbrane vs. Drainage Rock <br /> 8000 <br /> 7000 <br /> 6000 <br /> a 5000 <br /> rn <br /> 4000 I <br /> 3000 <br /> - I <br /> Q) <br /> 2000 - <br /> 1000 <br /> 0 <br /> 0.0 1.0 2.0 3.0 4.0 <br /> Displacement (inches) <br /> TRI Log No, E2128-56-09 01000 psf 0 3000 psf ®5000 psf 0 8000 psf 015000 psf 1 <br /> 9063 Bee Caves Road Austin,TX 70733-6201 (5121 263-2101 FAX(512)263-2558 1-800-880-TEST <br />