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Phase IVb Weekly Summary No. 6 Page 3 003-2203 • Golder observed placement of SF, CSB, and CP for underground working remediation. These materials were placed in accordance with the drawings and specifications into excavated or open underground workings. Golder previously obtained samples of SF for laboratory testing. Materials supplied met specifications. Ames conducted field testing and sampling of CSB and CP concrete as per specifications, and will supply 28-day strength results. Golder observed backfill of the geomembrane anchor trench for proper dimensions, lifr thickness, compaction, and use of suitable material. Golder observed geomembrane deployment repairs, documenting ambient air temperature, seaming, tie-in overlap, and seam testing (trial seams, pressure, vacuum, and destructive). Geomembrane placed in Phase IVb met specifications. Golder observed placement of LVSCF full time for correct material, road thickness, drop height, and liner damage. LVSCF was placed in accordance with the specifications. Golder observed placement of Low Volume Solution Collection piping for proper materials, connections, and location. Golder observed and documented confirmation drilling activities associated with the Phase IV construction. Full-time monitoring was given to confirmation drilling of underground workings, including logging holes, marking drill locations, surveying holes, and documenting underground • workings encountered. Laboratory Tests Golder obtained one sample of Soil Liner Fill (SLFb-07) and one sample of LVSCF (LVSCFb-02) for laboratory testing. The samples tested met the requirements of the specifications and results are presented in Attachment B. Meetings CC&V held a Weekly Contractors meetings on November 12~h and 19`h. Items discussed included Safety, Environmental, Schedule, and CQA. The next weekly meeting will be held on December 3rd 2002 at 10:00 AM. Golder Personnel On-Site A summary of all Golder CQA personnel on site during this reporting period is presented in Attachment C. Sincerely, • Bob Nichols Resident CQA Monitor Phase IW Ob Nov10.30 Golder Associates Inc.