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Hole Number: Sheet 8 of 18 <br /> ' HERST & ASSOCIATES, INC.- AMW-30 Soil Log <br /> Northing: 2,148,062.1 Easting: 6,367,022.3 Ground Surface Elevation: 45.0 <br /> ' Project: Austin Road NCYCC Drilling Rig Type: Mud Rotary <br /> Project No.: 120091514 Method of Drilling: Boart-Longyear DB540 <br /> ' Site Location: Stockton,California Drilling Dates: January 18-22,2010 <br /> Graphic ZH <br /> Soil Description Log Cn Notes <br /> ' 70.0 to 71.5 ft.-Silty CLAY,slightly moist,soft,low Borehole Area Air Measurements: <br /> plasticity,trace mica throughout,dark yellowish brown 15 0%LEL CH <br /> 4 / 0 ppm VOC <br /> (1 OYR 3/4). <br /> 71.0 14 1.5 30 <br /> 36 <br /> ' 72.0 <br /> 73.0 <br /> 74.0 <br /> ' 75.0 <br /> 75.0 to 76.0 ft. -Silty CLAY,moist,stiff,plastic,mica Borehole Area Air Measurements: <br /> and iron staining throughout,brown(IOYR 4/3). 11 0%LEL CH / 0 ppm VOC <br /> t 76.0 15 5 22 <br /> 76.0 to 76.5 ft.-Silty CLAY,dry,very stiff,not plastic, 50 <br /> iron staining throughout,grayish brown(IOYR 5/2). <br /> 77.0 <br /> ' 78.0 <br /> 79.0 <br /> ' 80.0 <br /> Drilling Contractor: Precision Sampling,Inc. <br /> Driller: Brian Johnson F/7�1 FU <br /> Helper: Mac,Steve,&Charlie <br /> Logged By: Leslie Keuss CLAY SILT SAND GRAVEL <br />