2004-10-18_REVISION - M1980244 (27)

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Phase Nc Summary No. 13 Page 2 043-2170 screen plant by the secondary crusher • Poly-Flex continued deployment of 80-mil single-sided textured LLDPE geomembrane in the Phase 1Vc OSA. Geomembrane was installed in the Phase PJc OSA on the south facing slope of Raven Hill downwazd to the Phase IVb/IVc tie-in. Poly-Flex deployed 80-mil single-sided textured LLDPE geomembrane over an azea of approximately 231,085 squaze feet in the Phase IVc OSA during this reporting period. Geomembrane panels C-485 through C-569 were deployed, seamed, and tested by Poly-Flex. Destructive fusion and extrusion seam samples DFc-174 through DFc-200 and DXc-18 through DXc-21 were mazked and removed. Destructive fusion and extrusion seam peel and shear testing on samples DFc-167 through DFc-187 and DXc-17 through DXc-20 were performed and passed per project specification. Ames continued hauling, placement and grading of DCF material into the Phase IVc OSA in the western and central portion of the VLF, Raven Hill azea. Ames placed DCF material and High Volume Solution Collection (HVSC) piping per the project plans onto approved geomembrane panels. • I • A map of the azea worked during this reporting period is provided in Attachment C. Field Monitorine and Testin¢ Activities Golder observed construction activities associated with Phase Nc earthworks. All construction materials and soil materials placed were verified as suitable, and construction methods were in accordance with project specifications. Golder observed placement, compaction, and moisture conditioning of SLF in the Phase 1Vc OSA for subgrade preparation, thickness, compaction, moisture-content, and materials used. The Golder CQA earthworks monitor performed twenty nine nuclear moisture-density tests (SLNc-142 through SLNc- 171) and performed six nucleaz moisture-density retests on SLF that required reworking (SLNc-154a, SLNc-156x, SLNc-158a, SLNc-162x, SLNc-167a, and SLNc-169a). Field test results aze presented in Attachment B. Golder observed geomembrane deployment, documenting ambient temperature, panel dimensions, ' thickness, seaming, tie-in overlap, and seam testing-(trial seams, pressure testing). Geomembrane installed in the Phase IVc OSA met the project specification. Golder visually observed the placement of DCF in the Phase IVc OSA area. Golder CQA monitors (one monitor per dozer when dozers aze greater than 50 feet apart) observed DCF placement and verified minimum thickness of 2 feet for finish grade, and 4 feet for haul traffic (i.e., Caterpillar Mode1740 articulated trucks). Golder observed placement of HVSC piping in the Phase IVc OSA, verifying installation and layout per the project plans. rnss~rvc u.w~,.~i-w~c nooa.aa GOIder ASSOCIateS lnC.