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C <br />In all, five critical cross sections (1-1' through 5-5') have been analyzed. These cross <br />sections have been selected based on a review of the final waste- grading plan in <br />conjunction with the base grading plan for each module. The cross section locations are <br />shown in Figures 1 and 2. Figure 1 also shows the base grading plan within the future <br />modules, and Figure 2 also shows the proposed final grading plan for the entire landfill. <br />Cross Section 1-1' represents the most critical cross section for the global slope stability <br />of existing Module 1. Similarly, Cross Section 2-2' represents the most critical cross <br />section within the existing Module 3. Cross Sections 44' and 5-5' represent the most <br />critical cross section global slope stability within Modules 4 through 11. Cross Section <br />3-3' is the most critical cross section for interim stability during waste filling in the future <br />Modules 5 through 11. <br />4.2 Results of Static Slope Stability Analyses <br />4.2.1 Global Slope Stability of Module 1 <br />As noted above, Cross Section 1-1' was used to analyze global slope stability of Module <br />1. Cross Section 1-1' is shown in Figure 3. A friction angle of 10 degrees was used to <br />represent the liner shear strength within this module, as discussed in Section 3.2.1.3. The <br />slope stability analysis yielded a minimum static factor of safety of 1.518, which is <br />greater than the acceptable value of 1.5. <br />The results of all SLOPE/W analyses for static condition are included in Attachment B. <br />The slope stability analyses results are also summarized in Table 1. <br />Geotechnical Analyses for NCRCSL Department of Public Works/solid Waste <br />Shaw Environmental, Inc. County of San Joaquin, December 12, 2007 <br />4-1 <br />