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Cripple Creek & Victor Gold Mining Company <br />Cresson Project <br />Quality Assurance Monitoring and Test Results ameo <br />Load Out Bin Relocation <br />July 7, 2009 <br />2.5 LOB Liner System <br />A single geomembrane composite liner system was installed on the LOB pad. The composite <br />liner system on the LOB pad consists of a minimum of 12 inches of compacted SLF overlain by <br />a single layer consisting of both 100-mil single sided texture and 80-mil smooth LLDPE <br />geomembrane. The installation of the geomembrane in the LOB began on April 15, 2009 and <br />was completed on April 28, 2009. <br />Ames anchored geomembrane at the limits of the LOB in a 3 feet deep by 2 feet wide anchor <br />trench. Ames backfilled the anchor trenches with suitable anchor trench backfill material. Ames <br />placed anchor trench backfill in maximum 12-inch-thick compacted lifts. Anchor trench backfill <br />was compacted with a hand-operated, 500-lb. vibratory compactor and "Jumping Jacks." The <br />LOB geomembrane liner overlapped and was extrusion welded to the Phase IVc VLF liner <br />system, as detailed in IFC Drawing No. A250. The geomembrane as-built panel layout is shown <br />on Figure 6. <br />Upon completion, a 2 -foot layer of DCF was then placed over the geomembrane. <br />2.6 Drain Cover Fill <br />• Ames began placing DCF in the LOB on April 29, 2009 and completed placement on May 6th, <br />2009. Ames processed DCF from April 10th, 2009 to April 14th, 2009 and from May 4th, 2009 <br />to May 5th, 2009 by screening crushed Cresson Ore over a vibrating one and one-half inch <br />screen to remove oversize material from the borrow source. Ames placed approximately <br />3,224 cubic yards of DCF on the LOB pad. DCF was placed in a minimum 2-foot thick lift over <br />the geomembrane and in a 10-foot thick lift where 777 haul trucks traveled over the <br />geomembrane. During fill placement, PVC grade markers were placed at grade breaks and on <br />a maximum 50-foot by 50-foot grid. After DCF placement, PVC grade markers were removed, <br />and Ames performed any additional grading required. Ames placed DCF in an uphill direction <br />on any slopes steeper than 4HAV. An isopach showing thickness of the DCF is shown on <br />Figure 7. <br />• <br />S1PROJECTS\1125E CCV CQA\H3 - CONSTRUCTIONILOB CERT REPORT\REPORT BODY\LOB CERT REPORT 2009.07.07.DOC 8