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' Hole Number: Sheet 6 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 /> rProject: 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 Z' a.,>Soil Description Log 0 00 Notes <br /> ' 50.0 to 51.2 ft. -Silty CLAY with trace fine grained Borehole Area Air Measurements: <br /> sand throughout,dry,very stiff,not plastic,dark 14 0%LEL CH <br /> 4 / 0 ppm VOC <br /> yellowish brown(10YR 4/4). <br /> 10 19 <br /> 51.0 1.5 <br /> 35 <br /> 51.2 to 51.5 ft.-Sandy CLAY,dry,very stiff,not <br /> ' plastic,dark yellowish brown(10YR 4/4). Contains <br /> 20%medium grained,subangular sand. <br /> 52.0 <br /> 53.0 <br /> 54.0 <br /> 55.0 <br /> 55.0 to 56.5 ft. -Silty CLAY,slightly moist,medium Borehole Area Air Measurements: <br /> stiff,plastic,brown(7.5YR 4/4). 15 0%LEL CH / 0 ppm VOC <br /> ' 11 Ll 20 <br /> 56.0 1.5 <br /> 29 <br /> ' 57.0 <br /> ' 58.0 <br /> 59.0 <br /> 60.0 <br /> Drilling Contractor: Precision Sampling,Inc. <br /> Driller: Brian Johnson 7/� M <br /> ' Helper: Mac, Steve,&Charlie CLAY SILT SAND GRAVEL <br /> Logged By: Leslie Keuss <br />