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• <br />4.0 DISCUSSION AND RECOPTMENDATIONS <br />4.1 GENERAL <br />This section presents our evalution of existing <br />cuts and fills at the site, of proposed future construction, <br />and of final reclamation of the site. Our evaluation is <br />based on our original geotechnical review of the site, our <br />subsequent field program of drilling, test pitting, and <br />sampling, the testing of the materials sampled, and the <br />results of our stability analyses. <br />4.2 EXISTING FACILITIES <br />4.2.1 Crushing and Screening Level Fi11 <br />L~ <br />• <br />The results of the stability analyses of the crush- <br />ing and screening level fill as presented in Appendix C in- <br />dicate safety factors close to unity against shallow, near <br />surface failures (SF = 0.9i for a fully drained slope). A <br />considerably higher safety factor (SF = 1.87) was found for <br />a deep seated failure, assuming again a fully drained slope. <br />The inclusion of significant pore pressure that could arise <br />due to ground or surface water seepage producing a saturated <br />zone within the fill, considerably decreases the calculated <br />safety factors. <br />It is important to understand this behavior; if the <br />fill is kept dry, probable failures of it caould be only sur- <br />~ ficial and of a Limited yardage. ldith a partial saturation, <br />poten[ia1 failures would become deeper and their yardage would <br />i~ considerably increase. <br />- ~I - <br />GE6MYDR0 CONSULTING, INC. <br />