2014-02-07_REPORT - M1980244 (3)

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Cripple Creek & Victor Gold Mining Company PSES Pipe Rack Liner Extension Final Report Quality uality Assurance Monitoring &Test Results February 4, 2014 4.1.3 Atterberg Limits AMEC performed Atterberg limits testing of the DCF materials. Samples tested met project specifications for Atterberg limits. Atterberg limits test data are presented in Appendix H and summarized in Table 4. AMEC performed five CQA Atterberg limits tests of DCF. The testing frequency (approximately one test per 881 cubic yards) exceeded the minimum specified testing frequency of one test per 1,000 cubic yards. The DCF Atterberg limits met project specifications, and the results are presented in Appendix H and summarized in Table 4. 4.2 Field Testing and Monitoring AMEC observed earthwork fill operations at the PSES Pipe Rack Liner Extension to verify, when necessary; lift thickness, adequate compaction, and acceptable moisture conditions. 4.2.1 Random Fill Subgrade Preparation AMEC monitored random fill subgrade preparation for compliance with the Technical Specifications. It was verified that Ames removed protruding rocks from the subgrade surface and the subgrade surface was smooth and unyielding prior to GCL placement. 4.2.2 Drain Cover Fill AMEC provided visual monitoring of DCF placement. One AMEC monitor and one Ames labourer per machine monitored the DCF placement, unless two machines were within approximately 50 feet of each other during DCF placement. Where present, AMEC verified that wrinkles in the geomembrane did not fold over. PVC grade markers were placed on a maximum 50 foot by 50 foot grid and at grade breaks; and all fill materials were suitable. AMEC continuously inspected geomembrane during DCF placement; marked areas for repair if required; and verified that all repairs were completed to project specifications. After final grading, AMEC monitored removal of PVC grade markers. 9