2004-10-18_REVISION - M1980244 (27)

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Phase IVc Summary No. 5 Page 2 043-2170 • Ames hauled, placed, and compacted Soil Liner Fill (SLF) material into the Phase Nc OSA in the central portion of the VLF. SLF material was tested, conditioned, reworked, retested, and maintained prior to SLF surface acceptance. Ames continued production of bentonite-amended SLF at the screen and pug mill plant located above the Ames materials yazd. Ames also continued production of Drain Cover Fill (DCF) material at the screen plant located neaz the secondary crusher. Poly-Flex continued deployment of 80-mil single-sided textured LLDPE geomembrane in the Phase IVc OSA. Geomembrane was placed in the Phase IVc OSA on the east-facing slope of Chickenhawk Hill and onto the Saddle Fill area, at the Phase IVb/IVc tie-in. Poly-Flex deployed 80-mil single-sided textured LLDPE geomembrane over an area of approximately 375,634 square feet in the Phase Nc OSA during this reporting period. Geomembrane panels C-118 through C-236 were deployed, seamed, and tested by Poly-Flex. Destructive fusion and extrusion seam samples DFc-037 through DFc-082 were mazked and removed. Destructive fusion and extrusion seam peel and sheaz tests on 80-mil single-sided textured LLDPE geomembrane samples DFc-037 through DFc-060 were tested during this reporting period and passed per project specifications. Ames continued placement and grading of DCF material into the Phase IVc OSA, on the west area of the VLF on Chickenhawk hill. Ames placed DCF material onto approved geomembrane panels and high volume solution collection 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 construction materials and soil materials placed were verified as suitable, and construction methods were in accordance with project specifications. Golder observed construction of LDT in Phase IVc for trench dimensions, slope, and materials used. Golder observed excavation of SU in Phase IVc for trench dimensions and slope. Golder observed anchor trench excavation and backfill in the Phase IVc OSA for proper location and dimension (2' wide by 3' deep). Anchor trench excavation met or exceeded the requirements of the specifications. Golder observed placement, compaction, and moisture conditioning of SLF in the Phase IVc OSA for subgrade preparation, thickness, compaction, moisture content, and materials. The Golder CQA Earthworks monitor performed fifteen nuclear moisture-density tests (SLNc-054 through SLNc-69) and performed three nucleaz moisture-density retests on SLF that required reworking (SLNc-57a, 63a, and 67a) located within the Phase IVc OSA. The retested SLF met the requirements of the specifications. Field test results aze presented in Attachment B. • PnaselVcOS twe bJwe @2004.dac Golder Associates lnc.