2004-10-18_REVISION - M1980244 (27)

Home Browse Search

Phase IVc Summary No. 3 Page 2 043-2170 Ames began excavation of the Phase Nc OSA geomembrane anchor trench from the southwest Phase • Nb/c tie-in on Chickenhawk hill, excavating approximately 600 linear feet of anchor trench in preparation for geomembrane deployment. Ames hauled, placed, and compacted Soil Liner Fill (SLF) material into the Phase Nc OSA, on the west area 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 yard. Poly-Flex began deployment of 80-mil single-sided textured LLDPE geomembrane in the Phase Nc OSA. Geomembrane was placed in the Phase Nc OSA on the east-facing slope of Chickenhawk Hill, at the Phase Nb/IVc tie-in. Poly-Flex deployed 80-mil single-sided textured LLDPE geomembrane over an area of approximately 112,903 square feet in the Phase Nc OSA during this reporting period. Geomembrane panels C-1 through C-36 were deployed, seamed, and tested by Poly-Flex. Destructive fusion and extrusion seam samples DFc-001 through DFc-004 were mazked and removed. Destructive fusion and extrusion seam peel and sheaz tests on 80-mil single-sided textured LLDPE geomembrane deployed during this reporting period passed per project specifications. A map of the area worked during this reporting period is provided in Attachment C. • • Field Monitorine and Testine 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 and compaction of SF in the Phase Nc OSA for subgrade prepazation, lift thickness, compaction, moisture content, and materials used. The Golder CQA Earthworks Monitor performed visual observations to verify conformance with method specifications. SF placed met the requirements of the project specifications. Golder observed construction of LDT in Phase IVc for trench dimensions, slope, and materials used. Golder observed anchor trench excavation 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 prepazation, thickness, compaction, moisture content, and materials. The Golder CQA Earthworks monitor performed twenty two nuclear moisture-density tests (SLNc- 001 through SLNc-22) and performed 3 nuclear moisture-density retests on SLF that required reworking (SLNc-16a and SLNc-20a and 20b) located within the Phase Nc OSA. The retested SLF met the requirements of the specifications. Field test results are presented in Attachment B. Pha,elVCW May 9-May 222004.do< Golder Associates lnc.