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TRI/ENVIRONMENTAL, INC. <br /> A Texas Research International Company <br /> pill INTERFACE FRICTION TEST REPORT <br /> 4011ent: Holdre8 a 8, Kull TRI L 09#!: E2128.56-09 <br /> _ <br /> Project: Forward Landfill Test Method: ASTM D 5321 <br /> Test Date: 6/10-6/13/01 <br /> Tested Interface: Clay Soil vs. Single-Sided Textured Geomembrane vs. Drainage Rock <br /> Upper Box: Drainage rock <br /> 14000 Floating: Single-sided textured geomembrane <br /> 12000 (textured side to clay) <br /> 10000 <br /> e000 Lower Box: Clay soil compacted to 99.9 pcf at <br /> 19.3%moisture content(90%maximum <br /> '^ e000 dry density at t 3%of optimum moisture content <br /> Eas determined by a modified Proctor test), <br /> 4000 <br /> 2000 Interface Interface soaked and loading applied <br /> Conditioning: for a minimum of 24 hours prior to shear <br /> 0-- <br /> 0 <br /> 0 5000 10000 15000 20000 Test Condition: Wet <br /> Normal Suess(psr) <br /> — <br /> mexmumsneerstress(uneerno Shearing Rate. 0.04 inches/minute <br /> Trial Number 1 2 1 3 4 J6183 Bearing Slide Resistance(lbs) 12 17 17 28 <br /> -- Normal Stress(psf) 1043 4214 5136 8838 <br /> Maximum Shear Stress(psf) 350 1669 1669 3073 Corrected Shear Stress(psf) 338 1652 1552 3045 Secant Angle(degrees) 18.0 21.4 17.8 19.4 <br /> RESULTS: Maximum Friction Angle and Y•intercept <br /> Regression Friction Angle (degrees): 20.8 <br /> Y-intercept or Regression Adhesion(psf): 0 <br /> Regression Line: Y= 0.379 'X+ 0 <br /> Re resslon Coefficient(r squared): 0.968 /) <br /> Notes: 1) The normal strong and shear strong values contain an area correction. Quality Review/Date <br /> 2) The regression line Includes the origin. <br /> 3) Sliding occurred alternately along the clay-geomembrane Interface and the drainage rock-geomembrane interface. <br /> The testing herein is based upon accepted industry practice as well as the test method listed. Test results reported herein do not apply <br /> to samples other than those tested. TRI noither accepts responsibility for nor makes claim as to the final us*and purpose of the material. <br /> TRI observes and maintains client confidentiality. TRI limits reproduction of this report,except In full.without prior approval of TRI. <br /> 9063 Bee Caves Road Austin,TX 78733-6201 (512)263-2101 (512)263-2558 1-800-880-TEST <br />