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' Phase IW Weekly Summary No. 26 Page 3 <br />Field Monitoring and Testing Activities <br />003-2203 <br />Golder observed construction activities associated with Phase >V earthworks. All construction materials <br />and soil materials placed were verified as suitable, and construction methods were in accordance with <br />project specifications. <br />Golder observed placement, compaction, and moisture conditioning of SLF in the Phase IVb OSA <br />for subgrade preparation, thickness, compaction, moisture content, and materials. The Golder CQA <br />Earthworks monitor performed sixteen nuclear moisture-density tests (SLNb-175 through SLNb- <br />190) and performed four nucleaz moisture-density retests on SLF that required reworking (SLNb- <br />176a, -181a, -182a, and -189a) located within the Phase IVb OSA. The tested SLF met the <br />requirements of the specifications. Field test results aze presented in Attachment B. <br />Golder observed placement of secondary and tertiary FTVSCS piping in the Phase IV'b OSA, <br />verifying construction and layout per the project plans. <br />Golder visuaIIy observed placement and grading of DCF in the Phase IVb OSA. Golder CQA <br />monitors (one monitor per dozer when dozers aze greater than 50 ft apart) observed DCF placement <br />and verified minimum thickness of 2 feet for furish grade, 4 feet for HVSCS primary pipe locations, <br />5 feet for 773 equipment, and 10 feet for haul road construction and equipment. <br />Golder visually observed removal of DCF from the Phase IVb / Phase I /Phase II tie-in area. Golder <br />marked damage caused to the geomembrane for subsequent repair during Phase IVb geomembrane <br />tie-in construction. <br />Golder observed anchor trench excavation in the Phase IVb OSA for proper location and dimension <br />(2' wide by 3' deep). Anchor trench excavation met or exceeded the requirements of the <br />specifications. Golder also provided part-time observation for anchor trench backfilling, verifying <br />construction per project plans. <br />Golder observed geomembrane deployment, documenting ambient air temperahue, panel <br />dimensions, thiclaress, seaming, tie-in overlap, and seam testing (trial seams, pressure, vacuum, and <br />destructive). Geomembrane placed in the Phase IVb OSA met the project specifications. <br />Laboratory Tests <br />Golder obtained QA samples of Drain Cover Fill (DCFb-11), and Soil Liner Fill (SLFb-18). <br />Laboratory index testing was conducted on samples of Drain Cover Fill (DCFb-11), and Soil Liner <br />Fill (SLFb-18) to verify suitability of materials used. Laboratory test results aze presented in <br />Attachment B. <br />Meetings <br />CC&V held a Weekly Contractors meeting on July 15, 2003. Items discussed included Safety, <br />Environmental, Schedule, and CQA. The next weekly meeting will be held on July 22, 2003 at <br />10:00 AM. <br />Phas<Nb 26 July13Ju1y19, 2003 Golder Associates Inc. <br />