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The previous slope ability analyses were ~aluated using <br />engineering strength parameters of 24° for the angle of internal <br />friction and 100 psf for the cohesion intercept for the composite <br />liner. The critical failure surface was a wedge type failure that <br />occurred along the geotextile/geomembrane interface which was <br />modeled using engineering strength parameters of 14° for the <br />internal friction and 0 psf for the cohesion intercept. The <br />critical failure surface did not occur along the composite liner <br />section. <br />Since the input parameters that were used in the referenced work <br />are still valid and the theoretical critical failure surface did <br />not occur through the composite liner, additional stability <br />analyses are not required. <br />If you have any questions or comments, please don't hesitate to <br />contact either me or Dr. Van Zyl. <br />Respectfully, <br />GOLDER ASSOCIATES INC. <br />~~(~ ~~ <br />David A. Kidd, P.E. <br />Project Manager <br />Geotechnical Engineering <br />Attachment: Draft Test Results (NO. 4 of 4) <br />