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<br />1 Stn Luis Project - Pheae 17 Raue I expansion Construction Stator Ripon <br /> 5.2 FaR6work <br /> 5.2.1 Raise Fill <br /> <br /> QA/QC testing of the raise fill has resulted in no failing insitu densities with the exception of <br /> the access ramps which were end dumped at the north and south abutments of the raise. These <br /> ramps were removed and replaced with properly placed and compacted fill. Compaction tests <br />' generally indicate a density which is 95 percent of maximum dry density (AS'I'M D-698) well <br /> above the minimum specified 85 percent of maximum dry density, <br />' Gradation tests indicate the fill material is meeting the revised specification for gradation <br />requirements. Laboratory permeability testing of a sample of the embankment fill placed at a <br />' similar density to that achieved in the fill resulted in a coefficient of permeability of 5.1 z lOb <br />cm/sec. Direct shear testing of two samples of the raise fill materials placed at a density similar <br />to that achieved in the actual fill has been conducted to verify the design values used. These <br />tests resulted in a friction angle of 37.6 degrees with 364 psf cohesion and a friction angle of <br />35.5 degrees with 618 psf cohesion. If the apparent cohesion is neglected, i.e. a c=o analysis, <br />the two tests result in friction angles of 40.8 and 39.7 degrees, respectively. <br />A summary of all QA/QC testing for the raise fill is contained in Appendix D.1, <br />' 5.2.2 Liner Cover/Drainage Blanket Material <br />QA/QC testing of Type 2, liner cover/drainage blanket material to date, has primarily consisted <br />of gradation tests at temporary stockpiles and does not represent final acceptance. Gradation <br />analyses, conducted on samples from the stockpiles prior to blending for placement on the liner, <br />' have indicated some samples which do not meet the specifications with regard to fines content. <br />These materials have been blended as they are placed on the liner and should result in a fmal <br />' material which meets the specifications. Final conformance testing as described in Section 3.4.2 <br />is currently underway. If significant amounts of Type 2 material which do nod conform to the <br />specifications are found, this material will be modified or removed and replaced with suitable <br />material. <br />An occasional zone containing 1 to 3 percent plus 1'h inch gravel has been identified in the Type <br />2 material borrow source. These particles are generally hard, durable, well rounded gravel. <br />October, 1995 11 SRK Project No. 14773 <br />