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Hole Number: Sheet 7 of 18 <br /> ' ERST & 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 /> Soil Description Graphic o a Notes <br /> Log v� <br /> ' 60.0 to 61.5 ft.-Sandy CLAY,slightly moist,stiff, Borehole Area Air Measurements: <br /> plastic,dark yellowish brown(10YR 3/6). 15 0%LEL CH / 0 ppm VOC <br /> 1_5 <br /> 61.0 12 1.5 30 <br /> 30 <br /> ' 62.0 <br /> ' 63.0 <br /> 64.0 <br /> ' 65.0 <br /> 65.0 to 66.5 ft.-Silty CLAY,slightly moist,medium Borehole Area Air Measurements: <br /> stiff,plastic,trace mica throughout,dark yellowish 11 0%LEL CH <br /> 4 / 0 ppm VOC <br /> brown(lOYR 4/4). 13 1.5 <br /> S 18 <br /> ' 66.0 <br /> 30 <br /> ' 67.0 <br /> ' 68.0 <br /> 69.0 <br /> ' 70.0 <br /> Drilling Contractor: Precision Sampling,Inc. <br /> Driller: Brian Johnson � FU LLI <br /> Helper: Mac, Steve,&Charlie CLAY SILT SAND GRAVEL <br /> ' Logged By: Leslie Keuss <br />