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ii Phase IVc Sununary No. 10 Page 2 043-2170 surface acceptance. Ames continued production of bentonite-amended SLF at the screen plant and pug mill located above the Ames materials Yazd. Ames also continued limited production of Drain Cover Fill (DCF) material at the screen plant by the secondary crusher. Poly-Flex continued deployment of 80-mil single-sided textured LLDPE geomembrane in the Phase IVc OSA. Geomembrane was installed in the Phase IVc 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 area of approximately 203,170 square feet in the Phase Nc OSA during this reporting period. Geomembrane panels C-363 through C-425 were deployed, seamed, and tested by Poly-Flex. Destructive fixsion and extrusion seam samples DFc-129 through DFc-151 and DXc-14 through DXc-15 were marked and removed. Destructive fusion seam peel and shear tests of samples DFc-120, DFc-123 through DFc-125, DFc-127 through DFc-128, DFc-130 through DFc-151, and DXc- 14 through DXc-15 were performed and passed per project specification. Ames continued limited placement and grading of DCF material into the Phase IVc OSA in the western and central portion of the VLF, Saddle Fill area. Ames placed DCF material onto approved geomembrane panels and High Volume Solution Collection (HVSC) piping per the project plans. A map of the azea worked during this reporting period is provided in Attachment C. Field Monitorine and Testine Activities Golder observed construction activities associated with Phase IVc earthworks. All construcfion materials and soil materials placed were verified as suitable, and construction methods were in accordance with project specifications. Golder observed excavation and construction of the SU in Phase Nc for trench dimensions, slope, and materials used. Golder observed placement, compaction, and moisture conditioning of SLF in the Phase IVc OSA for subgrade preparation, thickness, compaction, moisture-content, and materials used. The Golder CQA earthworks monitor performed fifteen nucleaz moisture-density tests (SLNc-102 through SLNc-116) and performed three nucleaz moisture-density retests on SLF that required reworking (SLNc-102a, 103a, and 104a) located within the Phase PJc OSA. The retested SLF met the requirements of the specifications. 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., Caterpillaz Model 740 articulated trucks). enaz~rv~~o~my ~iamy nzooa Golder ASSOCiates lnc.