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-? TRUENVIRONMENTAL, INC. <br />A Texas Research International Company <br />• Interface Friction Test Report <br />Client: Venture Resources TRI Log#: E2337-21-02 Richard Lacey, P.E. 03/23/2010 <br />Project: Hukill Gulch Millsite Test Method: ASTM D 5321 Quality Review/Date <br />Test Date: 03/23/2010-03/23/2010 <br />Tested Interface: Double-sided Geocomposite vs.60 mil Textured HDPE Geomembrane <br />Shear Stress vs. Normal Stress <br />14000 <br />Peak Shear Stress (linear Fit) <br />- - Large Displacement Shear Stress (Linear Fit) <br />12000 <br />H 10000 <br />a <br />N 8000 <br />N 6000 <br />d <br />N 4000 - <br />-- -0 <br />2000 - Q - <br />Test Resu lts <br /> Large <br /> Peak Displacement <br /> ( 3.0 in.) <br />Friction Angle <br />(degrees): 24.1 12.0 <br />Y-intercept or <br />Adhesion (psf): 224 270 <br />0 f - <br />0 2000 4000 6000 8000 10000 12000 14000 16000 <br />Normal Stress (psf) <br />Shear Stress vs. Displacement <br />8000 <br />1000 psf - 7500 psf p 15000 psf <br />7000 <br /> 6000 - <br />y <br />a <br />y 5000 <br />N <br />d <br /> 4000 Q <br /> 3000 - A <br />N <br /> <br /> <br />- <br />2000 ® <br />1000 <br />L 1111T. <br />0 t ?- <br />0.0 1.0 2.0 3.0 <br />Displacement (inches) <br />Test Conditions <br />Upper Box & Double-sided Geocomposite <br />(Lower Box 60 mil Textured HDPE Geomembrane <br />Box Dimensions: 12"x12"x4" <br />Interface Interface inundated with water and <br />Conditioning: loading applied for a minimum of 1 hour <br />prior to shear. <br />Test Condition: Wet <br />Shearing Rate: 0.20 inches/minute <br />• <br />Test D ata <br />Specimen No. 1 2 3 <br />Bearing Slide Resistance (lbs) 18 79 151 <br />Normal Stress (psf) 1000 7500 15000 <br />Corrected Peak Shear Stress (psf) 633 3645 6892 <br />Corrected Large Displacement Shear Stress (psf) 374 2060 3355 <br />Peak Secant Angle (degrees) 32.3 25.9 24.7 <br />Large Displacement Secant Angle (degrees) 20.5 15.4 12.6 <br />Asperity (mils) 25.0 25.0 23.8 <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 neither accepts responsibility for nor makes claim as to the final use 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