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August 2002 -2- 003 -2203 <br />(OSA). All quantities and testing frequencies presented in this report are current as of <br />August 2002, which represents completion of the Phase Na Area, as detailed in this report. <br />1.2 Construction Quality Assurance /Quality Control <br />Golder provided CQA and CQC monitoring and testing services, and prepared this report <br />describing the monitoring and test results for the Phase 1Va Area activities. As -built drawings <br />and supporting CQA and CQC monitoring and testing documentation are presented in <br />appendices attached to this report. <br />1.2.1 CQA Monitoring of Earthworks <br />Golder provided CQC testing and CQA testing and monitoring of earthworks for the Phase IVa <br />Area. CQA testing and monitoring of earthworks was provided for in =place materials in <br />accordance with the Golder Earthworks CQA Plan. The earthworks material specifications for <br />this project are summarized in Table 1. CQC earthworks testing was provided to support the <br />contractor during the manufacture of materials and prior to material placement. The CQC test <br />results are not included in this report because these tests were intended to assist the contractor in <br />materials preparation rather than record testing. <br />Golder provided CQA laboratory and field testing, and monitored earthworks construction <br />activities as follows: <br />Golder visually monitored and documented the remediation of <br />underground workings in the Phase IVa Area 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 (S SF), <br />Structural Fill (SF), and geogrid as specified. <br />Golder monitored construction of the Primary and Secondary Underdrains, <br />including verification that Ames excavated trenches to minimum required <br />dimensions and grades, and placed materials as specified. Golder <br />: w=. IOIM OOWcnxepos02ao32203.0400 04740M.u« Golder Associates <br />