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The chart on the following page shows the range in strength parameters for each of these <br />soils. For this analysis, a full range of cases will be analyzed, to account for any possible <br />embankment soil and foundation soil which could occur on the site. <br />Samples of the embankment for Pond 008 were taken in January of 2000 and found to <br />correspond to the descriptions given above for SM-SC or SC soil. In place density tests of <br />embankment material were made by extracting a certain volume, replacing the void with a <br />known volume of sand and later weighing the material extracted. The average wet density of <br />the in-place material was found to be 137.3 Ibs/cu.ft. The material was then dried and re- <br />weighed to give an in-place compacted dry density of 118.6 Ibs/cu.ft. The moisture content of <br />the original material was approximately 12%. Thls material will be representative of the material <br />used for all other dams on the site. The SM-SC or SC soils are preferred far the embankment <br />since the clay content results in better cohesion for dam construction. The lower foundation <br />material was also sampled and found to also correspond to the descriptions given above for <br />SM-SC or SC soil. The material was much sandier and had less clay. The same density test <br />was performed on this material which resulted in an in place wet density of 112.3 Ibs/cu ft. The <br />dry density was much lighter - 84.8 Ibs/cu. ft. The high water content of this material (24%), is <br />due to natural water present in the sandy subsoil. <br />The GC or GM soils have little clay to bind the material which results in a high angle of friction <br />but virtually no cohesion, while the SM-SC or SC soils have cohesive clay and a lower internal <br />angle of friction. <br />(Revised 2/00) Attachment 2.05.3(3) -10-88 <br />