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1 <br />~] <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br />1 <br />San Luis Project Phase U Rain 1 Ezrwneion - IPirul Construction Report <br />placed at a density similar to that achieved in the actual fill was conducted to verify the design <br />values used. These tests resulted in a friction angle of 37.6 degrees with 364 psf cohesion and a <br />friction angle of 35.5 degrees with 618 psf cohesion. If the appazent cohesion is neglected, i.e. a <br />c=o analysis, the two tests result in friction angles of 40.8 and 39.7 degrees, respectively. These <br />results compaze favorably to the sheer strength utilized for the fill in the design analyses and indicate <br />that the design values were conservative. Design analyses for the raise fill incorporated a friction <br />angle of 35 degrees and zero cohesion. <br />A summary of all QA/QC testing for the raise fill is contained in Appendix C.I. <br />6.2.2 Liner Cover/Draitrage Blanket Material <br />QA/QC testing of the Type 2, liner cover/drainage blanket material consisted of (1) gradation tests <br />at temporary stockpiles on the liner, acres 1 through 23, followed by fatal in place samples of two <br />samples per acre after grading, (2) gradation tests taken twice per day at the stockpile produced by <br />the borrow pit screening plant in addition to random in-place samples taken for each production shift <br />on the liner after spreading. The results of these tests aze contained in Appendix C.2. <br />' An occasional zone containing 10 to 20 percent plus 1'h inch gravel was identilfied in the Type 2 <br />material borrow source. These particles were generally hazd, durable, well rounded gravel. Larger <br />cobble sized materials were also present in the Type 2 material obtained from the borrow source. <br />These cobbles and plus 1.5 inch gravels were removed by screening plant processing. The <br />' occasional cobble and large gravel in acres 1 through 23 were removed to the surface of the cover <br />material during BIVIRI's visual inspection of the liner cover as it was spread over the liner. <br />' Solution collection pipes were placed directly on the synthetic liner prior to placement of the drain <br />blanket material. These pipes consisted of 4 and 6-inch diameter perforated HDPE drain pipes <br />' wrapped with a filter sock. The drain pipes were connected to the Phase I solution collection pipes <br />at the Phase I anchor trench taking care that all portions of the pipes were completely enclosed by <br />the filter sock. The drain pipes were placed at a nominal 40 ft. spacing througlloutthe expansion <br />area. Drawing 14719-104 depicts the drain pipe layout. <br />' The Engineer requested samples at six-inch depth intervals through the full thiclmess of the placed <br />cover material down to the VI.DPE liner at random locations for gradation testing to verify that <br />aY 13 Ject o. - <br />1 <br />