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<br />and computation sheets are included as Attachment 1. <br /> <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 meal. As described <br />previously, the samples of screened material contained no material larger thiin 11/z inches and <br />included a range of from 93.8 to 98.8 percent passing the 3/4 inch sieve. The minus 200 <br />fraction 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 a(lopted for the Soil <br />Liner Fill: <br />Soil 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 />LINER) <br />U.S. Standard <br />Sieve Size Percent Passin~ <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 IS - 50* <br />Plasticity Index 10 minimum" <br />denotes unchanged Trom previous specification <br />The following Table summarizes the "key" data from the screening and permeability tests. <br />Table 3. SUMMARY OF KEY CHARACTERISTICS OF QLONCLAD MATERIAL THROUGH SCREEN AND PERMEABJLrTY <br />TESTS <br />SAMPLE NO. DATE SOURCE MAX SIZE (in) % < 3/4 (n) % G 200 k (cm/aec) <br />401 3 Jul Pug -3/4 0 23.7 <br />4-02 3 JuI Pug -1 2.1 24.0 <br />4-03 3Jul Pug -I ~h 4.S 23.0 <br />404 I I )ul Pug -7" 8.9 15.0 <br />3 <br />