A standard penetration test (SPT) was performed at a depth of 11 ft. below the ground surface (boring CLB-39). The soil was deposited sometime between the end of glaciation in the Chicago area (10,000...

A standard penetration test (SPT) was performed at a depth of 11 ft. below the ground surface (boring CLB-39). The soil was deposited sometime between the end of glaciation in the Chicago area (10,000 years bp) and the last major lake recession (4000 bp). Assume that the FILL is poorly graded sand (SP). (c) Calculate N_1, 60 and assume that the unit weight gamma can be estimated based on given dry density of gamma_d = 110 pcf (80% saturation above the water table and 100% saturation below and G_s = 2.7).