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ID~~-689-3254 JUL 22.1 18 07 No .012 P.04 <br />and computation sheets are included as Attachment 1. <br />Grain Size distribution curves were developed for the soil liner fill obtained from each of the <br />four permeability test locations that were used to compute the geometric mean. As described <br />previously, the samples of screened material contained no material larger th:ln I'k inches and <br />included a range of from 93.8 to 98.8 percent passing the 3/4 inch sieve. The minus 200 <br />fJaction on the samples tested ranged from 16.3 to 25.1 percent. Grain size distributions of the <br />four permeability test sites are included as Attachment 2. <br />Golder Associates has recommended to us that the following specification be atlopted for the Soil <br />Liner Fill: <br />Solt Liner Fill -processed materials from the off site Ironclad tailing pile located near <br />the Victor Mill conforming to the following SPECIFICATION: <br />Table 2. RECOMMENDED SPECIFICATIONS FOR IRONCLAD MATERIAL (SOIL <br />LAVER) <br />U.S. Standard <br />Sieve Sizc Percent Passing <br />by Dry Weight <br />2 inch 100 <br />3/4 inch 90 - 100 <br />3/8 inch 65 - 100 <br />No. 4 50 - 100" <br />No. 40 20 - 50• <br />No. 200 15 - 50• <br />Plasticity Index 10 minimum" <br />"` denotes unchanged from previous specification <br />The following Table summarizes the 'key' data from the scJeening and perneability tests. <br />'hble 3. SUMMARY OP 1QlY CHARACrifRWJ7CS OP 020NCLAD MATDUAL THROUGH SCRBBN AI• D PPRMPAa1LrrY <br />TBYlS <br />dAMP1.H NO. DATE 60URCH MAX SIZfi Q~0 % < 7M Qn) % < 200 k (cmlwc) <br />401 3 Jul Pub -3/4 0 13.7 <br />402 3 Jul iLO -I 1.1 2d.0 <br />403 3 Jul 1LQ -1 ~/. ~.i 13.0 <br />4W 111d Fur -]• t.9 15.0 <br />3 <br />