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r <br />real • . GEOSYNTEC CONSULTANTS <br />Mr. David A. Kidd, P.E. <br />Project Geotechnical Engineer <br />Golder Associates, Inc. <br />200 Union Boulevard, Suite 500 <br />Lakewood, Colorado 80228 <br />Subject: Final Report <br />Interface Direct Shear Test7ng <br />Golder Project No. 933 - 2442..9 <br />Dear Mr. Kidd: <br />4r .::a 'u Laboratory <br />5775 Peachtree Dunwoody Road • Suitt 10D <br />Atlanta, Georgia 30342 • USA <br />Tel. (404) 705 -9500 • Fax (404) 705 -9300 <br />29 September 1993 <br />GeoSyntec Consultants (GeoSyntec) is pleased to present the results <br />of the interface direct shear testing program performed for Golder <br />Associates, Inc. (Golder). The interface direct shear testing was <br />conducted at GeoSyntec's Geomechanics and Environmental Laboratory in <br />Atlanta, Georgia. This letter report was prepared by Mr. Robert H. Swan, <br />Jr., E.I.T. and Dr. Zehong Yuan, both of GeoSyntec. The report was <br />reviewed by Dr. Gary R. Schmertmann, P.E., also of GeoSyntec, in <br />accordance with the internal peer review policy of the firm. <br />The tests were conducted in accordance with the procedures defined <br />in the 31 August 1993 memorandum prepared by Mr. David A. Kidd, P.E. of <br />Golder. GeoSyntec understands that the purpose of the testing program <br />was to evaluate the minimum interface shearing resistance between three <br />selected lining components using the direct shear method. Tne three. <br />lining components consist of a crushed rock overliner, an 80 -mil (2 -mm) <br />thick Gundle Lining Systems, Irc. ( Gundle) smooth very low density <br />polyethylene (VLDPE) geomembrane., and an iron clad tailings material. <br />GeoSyntec also understands that the sample preparation procedures and <br />testing conditions -used in the testing program were selected by Golder <br />to simulate field conditions. <br />GL3458/GEL93234 <br />4 °tlC <br />W '' Street • Suite 650 <br />uida 33487 • USA <br />0 -0900 • Fax (407) 995 -0925 <br />Regional Office: <br />Atlanta, GA • Boca Raton. FL <br />Columba, MD • Huntington Beach. CA <br />Walnut Creek. CA • Brussels, Belgium <br />.ee■cLefl ena..�ae <br />Laboratories: <br />Atlanta. GA <br />Boca Raton. FL <br />Huntington Beach. CA <br />