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Cripple Creek & Victor Gold Mining Company <br />Cresson Project <br />Quality Assurance Monitoring and Test Results <br />Phase 4B/C Triangle Liner Certification <br />August 10, 2010 <br />4.0 EARTHWORK CQA TESTING AND MONITORING <br />The following sections summarize results of the earthwork CQA testing and monitoring <br />performed by AMEC. <br />AMEC conducted CQA testing of earth materials used for construction. Table 3 presents <br />specified and observed CQA testing frequencies. <br />In accordance with the AMEC CQA Plan, when an AMEC monitor observed deficiencies, the <br />monitor determined the nature and extent of the problem and notified Ames and/or CC&V. <br />When unsatisfactory test results identified a deficiency, AMEC performed additional tests to <br />define the extent of the deficient area. Ames corrected deficiencies to meet the requirements of <br />the specifications, and AMEC retested and/or approved the corrected deficiency prior to any <br />additional related work <br />4.1 Results of Laboratory Soils Testing <br />AMEC performed laboratory testing of soils during all aspects of the construction. All testing was <br />performed on-site. To verify that the earth materials used during construction met project <br />specifications, AMEC completed the following tests in accordance with the American Society for <br />Testing and Materials (ASTM): <br />¦ Rock corrected density values (ASTM D4718); <br />¦ Grain size distribution (ASTM D1140 for material finer than the No. 200 sieve, and <br />ASTM C117 and C136 for coarse material); <br />¦ Moisture content (ASTM D2216); <br />¦ Atterberg limits (ASTM D4318); <br />¦ Standard Proctor compaction (ASTM D698); <br />¦ Permeability (ASTM D5084, Method D); <br />¦ In-place density testing (ASTM D2922); and <br />¦ Soil description (ASTM D2488) <br />S:\PROJECTS\1125E CCV CQA\H2 - DESIGN\TRIANGLE\FINAL\TRIANGLE CERTIFICATION REPORT FINAL REVI.DOC 9