Laserfiche WebLink
"Ah <br />Will"ret" <br />2.1 Subgrade Preparation <br />Prior to BF placement, Ames moisture conditioned and compacted the entire surface of the LOB <br />Liner Extension with a smooth drum vibratory compactor. The quality of the finished surface <br />was then maintained until BF was placed. <br />2.2 Bedding Fill (prior to geosynthetic installation) <br />Based on neat -line survey, Ames placed and compacted approximately 1,060 cubic yards of BF <br />below the GCL for the LOB Liner Extension footprint to project specifications. <br />Ames processed the BF for the LOB Liner Extension construction as part of the Phase 5 <br />construction. Ames worked the crushed material through a screen to remove oversized material <br />from the BF to uniformly condition the material to project specifications. <br />The BF was compacted to a minimum thickness of 12 inches by a smooth -drum vibratory <br />compactor. BF was moisture - conditioned and compacted as needed to meet project <br />specifications. The minimum BF density was 95 percent of the maximum dry density at <br />optimum moisture content to 3 percent wet of optimum as determined by standard Proctor tests <br />performed by AMEC. Areas of the BF that initially failed to meet the moisture - density <br />requirement were moisture - conditioned, if necessary, and re- compacted to achieve the required <br />compaction to project specifications. <br />Prior to GCL deployment on the BF, Ames proof - rolled, compacted, and hand - worked the fill <br />surface to be free of abrupt grade changes. AMEC then inspected the surface. Sharp or <br />angular stones greater than 0.75 inches in diameter were removed from the finished surface. <br />AMEC approved fill surfaces prior to release to Lonestar ( Geosynthetic Subcontractor to Ames) <br />for deployment. AMEC provided formal subgrade approval prior to geomembrane deployment. <br />The subgrade acceptance forms are presented in Appendix D. <br />2.3 Composite Liner System <br />A GCL and geomembrane composite liner system was installed in the LOB Liner Extension. <br />The composite liner system consists Bentomat ST GCL overlain by a single layer consisting of <br />80 -mil single sided texture LLDPE geomembrane. <br />Ames anchored the composite liner at the limits of the LOB Liner Extension in an anchor trench, <br />measuring 3 feet deep by 2 feet wide. Ames backfilled the anchor trenches with suitable anchor <br />trench backfill material, placing the material in 12- inch -thick lifts and compacting it with a <br />"Jumping Jack ". The geomembrane as -built panel layouts is shown in Appendix A. <br />Upon acceptance of the liner system, a 2 -foot layer of BF was then placed over the <br />geomembrane to project specifications. <br />0 <br />