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rock disposal facilities have been designed assuming that the <br />• Santa Fe Conglomerate materials may be deposited in any area. <br />This is the most conservative assumption. The presence <br />of the more competent gneiss waste rock materials in any <br />portion of the facilities will generally improve the <br />geotechnical characteristics. <br />The engineering properties of the reworked conglomerate <br />waste rock materials have been estimated using classification <br />test results presented in the original application in <br />conjunction with correlations from the engineering literature. <br />Data obtained from NAVFAC (1982) indicates that loose friction <br />angles between 30 and 40 degrees have been obtained for similar <br />fill materials. For analytical purposes, a friction angle of <br />35 degrees for end-dumped waste rock has been assumed. The <br />cohesion intercept has been assumed to be zero. <br />The foundation materials beneath the waste rock disposal <br />• facilities have been estimated to have a cohesion intercept <br />of zero and an internal effective stress friction angle of 33 <br />degrees. <br />Section D.3.5 of this amendment discusses the relation <br />of the assumed engineering properties to the stability analyses <br />for the various waste rock disposal areas. <br />The geochemical testing program for the waste rock <br />consisted of the following test series: <br />1. Whole rock analyses; <br />2. Acidificationfneutralization potentials; <br />3. Leachability; and <br />4. Humidity cell testing. <br /> <br />D-5 <br />