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Section i sectbn 2 <br /> 130 140 <br /> 120 130 <br /> Silo 120 <br /> • a <br /> g too 11I0 <br /> !0 too <br /> i 86 i <br /> 70 30 <br /> �60 0 so too 1s0 200 250 7�50 0 so 100 ISO 200 <br /> H"W#d 0Y1aw(H) Hatxard Micros(It) <br /> Section 3 Section 4 <br /> ISO ISO <br /> 140 140 <br /> Ti 130 <br /> 120 �120 <br /> 1I0 :to <br /> 100 j DO <br /> so to <br /> so 0 so 100 ISO 200 �0 30 too ISO 200 254 <br /> Hortz"d MAme(n) 1.tm plow•(n) <br /> Figure 1. Cross sections for the proposed waste pile configuration showing both the old (inside) <br /> new surface. <br /> (Consulting Geotechnical Engineers and Material Testing). A hollow stem auger was used to <br /> drill through the entire thickness of the existing pile. Samples were extracted at various depths <br /> and used to estimate the soil properties. A set of the results are attached. <br /> Direct shear tests were performed to determine the effective cohesion and friction angle. The <br /> result of these tests covered an exceptionally wide range and thus a triaxial shear test was <br /> performed to confirm the appropriate values. The unit weight of the material was determined <br /> during compaction tests. Both the original assumed values and the values determined from <br /> testing are shown in the table below. <br /> Source Friction Angle Cohesion Unit Weight <br /> Assumed 30° 0.ltsf,200psf 125 pcf <br /> Measured 32' 0.2tsf,403psf 86 pcf(dry) <br />