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above 20. Additionally, the CCL borrow material shall also meet the following <br /> criteria; <br /> a) Percent fines (should contain at least 20% fines on a dry weight basis). <br /> b) Percentage of gravel (material retained on a No. 4 sieve should not <br /> exceed 10%). <br /> c) Stones and rocks (no rocks larger than 2 inches should be in the liner <br /> material). <br /> Construction of the CCL will begin by moisture conditioning and disking of the <br /> weathered claystone borrow material on the excavation floor. Standard Proctor <br /> laboratory analysis of the CCL borrow material at a frequency of 1 per 10,000 yd3 <br /> shall be completed prior to moisture conditioning to determine the optimum <br /> moisture content/maximum dry density. <br /> A keyway shall then be excavated around the perimeter of the excavation offset <br /> approximately 5-6ft from the toe of the excavation slope. The keyway shall be <br /> excavated to a depth and width of 4ft with 1 H;1 V side slopes as shown in Exhibit <br /> F Reclamation Plan Sheet 3 (Typical Section). The clay liner will occupy the <br /> entire area between the mining highwall and the final 3:1 slope. <br /> Amen Aggregate Resource <br /> Specific Exhibits <br /> Page 12 of 84 <br />