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Cripple Creek & Victor Gold Mining Company -Cresson Project Frequency of QA/QC Viwal, In-Field, Inspections for Critical <br />Components DRAFT DRAFT DRAFT DRAFT DRAFT DRAFT DRAFT DRAFT DRAFT <br />'Critical Component' Approximate Frequency of On-Site Visual Specific Inspection Functions Covered <br /> Inspection by the Frequency for Component <br />I. Leeeh feiility (oundation including Frequent enough to insure all footprint Geology, Structure, end Ground-Wafer <br />berm foundation preparation and area has been inspected prior to Hydrology <br />placement of structural fill. placement of siructual fill end <br /> underdrein. <br />2. Underdrein installation (pipes, pipe Bedding and Drein material is inspected Potential Bedding and Drain Materiel <br />bedding material, drain rock, structural prior to and after bleating. Pipes ere Obstrved During Excsvation; Inttgrity <br />fill cover. geolextile and VLDPE). inspected when plated end prior to cover of Pipea; Quality of Bedding Materiel; <br /> wish bedding material. Placement of Quality of Drain Rock; Depth of <br /> bidding material is inspected 100 percent. Bedding; Continuity of Bedding Fill; <br /> Drain rock is inspected el least 50 percent Depth of Drain Rock; Continuity end <br /> during placement and prior to covering. Depth o(Slwcmrel Fill; Conlinuily end <br /> Slwctural fill, geolextile, end VLDPE is overlap of geolextile; Oversee VLDPE <br /> inspected 100 percent during placement. Installer's QA. <br />3. Leak dettction trtnches end sumps Trenches examined prior to 011 with pipe Siu of trenches; Bottom Ez<avalion end <br />(conOguretion, placement of liner, end grevel. Liner examined during Drain Grade (slope); Placement of Liner <br />placement of drain pipe and grevel installation and prior to 011. Pipe end and Oversee Installer's QA; Quality of <br />material). gravel examined 100 percent during Gravel; Dcpth and Conlinuily of <br /> placement. Grevel. <br />4. Toe 011 berm. 100 percent - of combination of 'key' Quality of Fill Material (Bortow); <br /> work performed (including in-situ Placement and Compaction of Fill <br /> density). Material (Density). <br />5. Soil liner 011. 100 ptrctnt of combination of 'key' Quelily of Liner Maltreat -Compliance <br /> work performed. With avoidance of oversize; Depth of <br /> Liner Material; Continuity of Liner <br /> Meleriel; Compaction of Liner Material. <br />6. Gcomembrane (VLDPE) installation. 100 percent. Note: Primary weld end Oversight QA of Liner Installer's QC <br /> other liner testing performed by the conlreclor testing and Independent rests <br /> installer's QA/QC contractor. of Welds. <br />7. Geotexlile inslallelion. 50 percent end prior to court with grevel. Continuity of Geolexlile; Maintain Flai <br /> end overlap During Fill. <br />B. Plectntent of leak collection pipes, 100 perccnt. Integrity end Conlinuily of Pipes; Pipe <br />access lubea, piezomeler, and gravel Dminege Grede; Quelily of Gravel; <br />materiel. Continuity end Depth of Gravel; <br /> Piezometer Inslnllalion end In-Situ <br /> Testing. <br />9. Placement of pump caisson bearing 100 percent. Installation of Protective Bedding <br />surfaces and caissons and placement of Material; Protection of Liner; Backfill <br />surrounding 011. end Concurrent Survey of Caissons. <br />10. Liner cover (gravel) installation. 100 piriinl. Quality of Cover Grevel; Continuity end <br /> Depth of Gravel; Prevention of Wrinkles <br /> in VLDPE Liner. <br />NOTE: This Table is in Draft Form because of potential differences in interpretation of frequencies. Until reviewed by OMLR, the <br />visual, in-Geld frequencies and scope shell be followed by CC&V according to CC&V's intent in drafting this tabulation. <br />