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amec? <br />Star) of Arlington, Texas completed the installation of geomembrane liner from May 2010 <br />through November 2010. Messrs. Ron Roberts and Tom Shepard represented CC&V as <br />the Construction Managers during the course of the work. All quantities and testing <br />frequencies presented in this report are current as of November 2010, which represents <br />completion of the 2010 Phase 5 VLF, as detailed in this report. <br />1.2 Construction Quality Assurance/Quality Control <br />AMEC provided CQA and CQC monitoring and testing services, and prepared this report <br />describing the monitoring and test results for the 2010 Phase 5 VLF. As-built drawings and <br />supporting CQA monitoring and testing documentation are presented in appendices <br />attached to this report. <br />1.2.1 CQA Monitoring of Earthworks <br />AMEC provided CQC testing and CQA testing and monitoring of earthworks for the 2010 <br />Phase 5 VLF. CQA testing and monitoring of earthworks was provided for in-place materials <br />in accordance with the AMEC Earthworks CQA Plan. The earthworks material <br />specifications for this project are summarized in Table 1. CQC earthworks testing was <br />provided to support the contractor during the manufacture of materials and prior to material <br />placement. The CQC test results are not included in this report because these tests were <br />intended to assist the contractor in materials preparation rather than record testing. <br />AMEC provided CQA laboratory and field testing, and monitored earthworks construction <br />activities as follows: <br />• AMEC visually monitored and documented the remediation of <br />underground workings within the Phase 5 VLF footprint, including <br />verification that Ames excavated underground workings to the minimum <br />specified dimensions and then installed Coarse Shaft Backfill (CSB), <br />Concrete Plug (CP), Cemented Rockfill (CR) Select Structural Fill (SSF), <br />Structural Fill (SF), or geogrid, as specified on the Issued For <br />Construction (IFC) drawings. <br />• <br />AMEC Earth & Environmental, Inc. <br />2000 S. Colorado Blvd 2-1000 <br />Denver, CO 80222 <br />Tel 303-935-6505 <br />Fax 303-935-6575 www.amec.com 2