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1 <br /> <br /> <br /> <br /> <br />1 <br />1 <br /> <br /> <br /> <br />23.1998 -5- 983-2348.160 <br />As shown in the above table, the results show that for all sections the minimum static <br />wedge FOS exceeded 1.5, and the minimum pseudo-static wedge FOS exceeded 1.0 for <br />1.6H:1V sideslopes around the perimeter of the valley leach facility. However, due to the <br />downsloping basal grade in the area of the Phase II Toe Berm and the presence of relatively <br />low interface shear strength components, particularly the interface between the geotextile <br />and the geomembrane above the underdrain and the composite liner interface between the <br />Soil Liner Fill and textured LLDPE geomembrane, section E-E' was considered stable only <br />for slopes of 2.SH:1V or shallower. <br />Golder appreciates the ongoing opportunity to provide engineering services for the Cresson <br />Project. Please contact the undersigned with any questions. <br />Sincerely, <br />LDER ASSOCIATES INC. <br />Terry Mandziak, .E. <br />Senior Engineer <br />James M. Johnson, <br />Associate <br />TM/JMJ/jck <br />1 <br />1 <br />1 <br />1 <br />1 <br />1 <br />' I:\98\2708@318RRO.lTR <br />Golder Associates <br />