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Phase IVb Weekly Summary No. 2 Page 3 003-2203 <br />Golder observed and documented remediation activities associated with the Phase IV underground <br />working construction. Workings were designated as Shallow or Deep as defined in the drawings. <br />Golder observed placement of SF, SSF, CSB, CP, and CR for underground working remediaion. <br />These materials were placed in accordance with the drawings and specifications into excavated or open <br />underground workings. Golder previously obtained samples of SSF, CSB, CR, and CP for laboratory <br />testing. Materials supplied met specifications. Terracon conducted field testing and sampling of CP <br />concrete as per specifications, and will supply 28-day strength results. <br />Golder observed construction of LDT in Phase IVb for trench dimensions, slope, and materials used. <br />Golder observed excavation of geomembrane anchor trench for proper dimensions and depth of SLF <br />exposed in the anchor trench. <br />Golder observed geomembrane deployment, documenting ambient air temperature, panel <br />dimensions, seaming, tie-in overlap, and seam testing (trial seams, pressure, vacuum, and <br />destructive). Geomembrane placed in Phase IVb met specifications. <br />Laboratory Tests <br />Golder obtained one sample of Structural Fill (SFb-13) and two sample of Soil Liner Fill (SLFb-03 <br />and SLFb-04) for laboratory testing. The samples tested met the requirements of the specifications <br />and results are presented in Attachment B. <br />Meetines <br />CC&V held a Weekly Contractors meetings on September 17a' and 24`s. Items discussed included <br />Safety, Environmental, Schedule, and CQA. The next weekly meeting will be held on October ls` <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 />Piave IVb 2 Septl S-28.Mc Golder Associates Inc. <br />