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Phase IVb Weekly Summary No. 32 Page 3 -' 003-2203 <br />Field Monitoring and TestingActivifies <br />Golder observed construction activities associated with Phase IV 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 />and the ADR Liner Expansion area for subgrade preparation, thickness, compaction, moisture <br />content, and materials. The Golder CQA Earthworks monitor performed thirty-two nuclear <br />moisture-density tests (SLNb-234 through SLNb-265) and performed eight nuclear moisture-density <br />retests on SLF that required reworking (SLNb-234a, 235a, 236a, 237a, 240a, 261 a, 262a, and 265a) <br />located within Phase IVb. The SLF met the requirements of the specifications prior to deployment <br />of geomembrane. Field test results are presented in Attachment B. <br />Golder observed placement of secondary and tertiary HVSCS piping in the Phase IVb OSA, <br />verifying construction and layout per the project plans. <br />Golder visually observed placement and grading of DCF in the Phase IVb OSA. Golder CQA <br />moiutors (one monitor per dozer when dozers are greater than 50 ft apart) observed DCF placement <br />and verified minimum thickness of 2 feet for finish 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 OSA tie-in areas and Phase I /ADR <br />Liner expansion tie-in areas. Golder marked damage caused to the geomembrane for subsequent <br />repair during ADR geomembrane 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. <br />Golder observed geomembrane deployment and repairs, documenting ambient air temperature, panel <br />dimensions, thickness, seaming, tie-in overlap, and seam testing (trial seams, pressure, vacuum, and <br />destructive). Geomembrane placed in the Phase IVb OSA met project specifications. Golder also <br />observed the repair and testing of damaged SO-mil SST anchor trench shoulder near the LVSC riser <br />pipes. <br />Golder observed placement of SSF and geogdd for underground working remediaion. These <br />materials were placed in accordance with the drawings and specifications. Materials supplied met <br />specifications. <br />rnazc rvts2 sep¢mba~a-s~~m,eRn.zoos Golder Associates inc. <br />