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Phase IV Weekly Summary No. 49 Page 4 <br />003-2203 <br />construction. Full time monitoring was given to confirmation drilling of underground workings <br />including logging holes, mazking drill locations, surveying holes, and documenting underground <br />workings encountered. <br />• Golder provided full time observation of DCF removal from the edge of the Phase I geomembrane <br />for defects outside of the Phase IV tie-in. Defects outside of the Phase IV tie-in were marked for <br />repair. <br />Golder observed remediation of UG-545 in Phase IVa on a full time basis for materials placed and <br />conformance with the location specific remediation plan. Golder used adown-ho]e camera to verify <br />that the gravel plug was placed correctly and document post flowable fill placement confirmation <br />drilling. Confirmation drilling results indicated that the opening between the Phase I EOL and the <br />gravel plug had been completely filled. <br />Laboratory Test Results <br />Golder obtained QA sample SSFa-02 of materials being placed in Phase IVa Primary Underdrain. <br />Material failed to meet project specifications and was removed. Test results aze presented in <br />Attachment B. <br />Meetings <br />CC&V held Weekly Contractors meetings on Mazch 12`h and Mazch 19`x. Items discussed include <br />Safety, Environmental, Schedule, and CQA. The next weekly meeting will be held on March 26"', <br />2002 at 10:00 AM. <br />• Golder Personnel On-Site <br />A summary of all Golder CQA personnel on site during this reporting period is presented in <br />Attachment C. <br />Sincerely, <br />Bob Nichols <br />Resident CQA Monitor <br />PhueIVa49 March1033 AOC Golder ASSOCiat¢5 Inc. <br />