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highly weathered shale). The assumption of a 4-foot thick <br />seepage zone at the bedrock/colluvium interface was also utilized <br />in this analysis. (Zt should be noted that this particular shear <br />strength condition with respect to the bedrock would not be <br />anticipated to occur in reality anywhere on the site.) <br />A chart showing the results of the sensitivity analysis is <br />included in the Appendix of this report. As may be seen by <br />comparing the results of condition S1 and condition #2, the <br />stability conditions on this particular site are relatively <br />J insensitive to the assumed piezometric condition. However, <br />comparing condition #1 and condition #3, it may be seen that <br />there is a relatively high degree of sensitivity associated with <br />assumed shear strength parameters. Comparing the results of <br />condition #3 and condition #4, one may see that with the <br />l exception of Section B, stability conditions exhibit little or no <br />J sensitivity to assumed shear strength parameters in the bedrock. <br />Section B is the one section dealing with stability of exposed <br />bedrock. As would be anticipated, assumptions regarding shear <br />strength conditions in bedrock materials had a substantial effect <br />1 on the stability in this section. However, as indicated earlier, <br />' the intent of this particular investigation was to establish the <br />relative insensitivity to assumed shear strength conditions in <br />the bedrock at all other locations. The shear strength <br />parameters utilized for the bedrock in this particular analysis <br />~ are the most conservative parameters which could possibly be <br />obtained and are not truly representative of any existing <br />condition on site. <br />9 <br />