2016-01-14_REPORT - M1980244 (15)

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Cripple Creek & Victor Gold Mining Company Squaw Gulch VLF Phase 1 (9,550-foot Elevation Bench to Geomembrane Panel P1635) Final Report Quality Assurance Monitoring & Test Results January 2016 Project No.: 74201125N0 Page 3 America manufactured the geomembrane used to construct Phase 1. ECApplications, Inc. (ECA) installed geomembrane liner from June 2015 through November 2015 for installation of geomembrane for this report. Messrs. Ron Roberts, Ron DiDonato, and Jeff Gaul represented CC&V as the Construction Manager and Construction Superintendents, respectively. All quantities and testing frequencies presented in this report are current as of December 2015, which represents completion of the Project, as detailed in this report. 1.2 Construction Quality Assurance/Construction Quality Control Amec Foster Wheeler provided CQA and CQC monitoring and testing services, and prepared this report describing the results for the Project. Record of construction drawings and supporting CQA monitoring and testing documentation are presented in appendices attached to this report. CQA Monitoring of Earthworks Amec Foster Wheeler provided CQC and CQA testing and monitoring of earthworks for the Project. CQA testing and monitoring of earthworks was provided for in-place materials in accordance with the AMEC Earthworks CQA Plan (Section 1400.1 of the project technical specifications; see Appendix E). The earthworks material specifications for this project are summarized in Table 3. CQC earthworks test results were provided to support the contractor during the manufacturing of materials and prior to material placement. The CQC test results are not included in this report as these tests were intended to assist the contractor in materials preparation rather than record testing. All CQA testing results are included. Amec Foster Wheeler provided CQA laboratory and field testing, and monitored earthworks construction activities as follows: • Amec Foster Wheeler monitored topsoil stripping, site grading, slope re-contouring, and structural fill (SF) placement, to include lift thickness, moisture conditioning, temperatures, compactive effort, in-place nuclear density testing, or monitored placement according to the method specification, and use of suitable SF materials. The materials were monitored during placement to confirm that the subgrade surface was unyielding, free from unsuitable and organic materials and was acceptable for soil liner fill (SLF) placement. Amec Foster Wheeler performed CQA laboratory testing of grain size and Atterberg limits. • Amec Foster Wheeler monitored construction of the Leak Detection System (LDS), including verification that Ames excavated the trench to the minimum required dimensions and placed materials as specified. Laboratory testing performed by Amec Foster Wheeler consisted of grain size and Atterberg limits of the Leak Detection Fill (LDF) placed in the LDS.