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I'Mi/CNVIRUNMENTAL, INC. <br /> A Texas Research International Company <br /> pil- INTERFACE FRICTION TEST REPORT <br /> Client: Holdrege& Kull TRI Log#;:: E2128.56-09 <br /> Project: Forward Landfill Test Method: ASTM D 5321 <br /> Test Date: 6/10-6113101 <br /> Tested Interface: Clay Soil vs. Single-Sided Textured Geomembrane vs. Drainage Rock <br /> Upper Box: Drainage rock <br /> 14D00 Floating: Single-sided textured geomembrane <br /> 12000 (textured side to clay) <br /> 10000 <br /> Lower Box: Clay soil compacted to 99.9 pcf at <br /> 0 s000 19.3%moisture content(90%maximum <br /> s000 dry density at+ 3%,of optimum moisture content <br /> E as 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 5000 10000 15000 20000 Test Condition. Wet <br /> Normal Stress(psf) <br /> --Mwmum shw svme tuneer nil Shearing Rate. 0.04 inches/minute <br /> 1� Trial Number 1 2 3 4 5 <br /> Bearing Slide Resistance(lbs) 12 17 17 28 48 <br /> Normal Stress(psf) 1043 4214 5136 8638 15598 <br /> Maximum Shear Stress(psD 350 1669 1669 3073 6183 <br /> Corrected Shear Stress(psf) 338 1652 1652 3045 6135' <br /> Secant Angle(degrees) 18.0 21.4 17.8 19,4 21.5 <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 /J <br /> 6(/7/U/"_ <br /> Notes: 1) The normal stress and shear streas values contain an area correction. Quality Review/Dale <br /> 2) The regression line Includes the origin. <br /> 3) Sliding occurred&Remotely 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 llalad. Test results reported herein do not apply <br /> to samples other than those tested. TRI neither accepts responsibility for nor makes claim as to the final use end purpose of the material. <br /> TRI obscrvas and maintains client confidentiality. TRI limns reproduction of this report,except In full,without prior approval of TRI. <br /> --- 9063 See Caves Road Austin,TX 78733-6201 (512)283-2101 (512)263-2558 1-800-880-TEST <br />