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T <br /> BORING NO. <br /> ALTON GEOSCIENCE, Inc. PROJECT NO. 30-136 DATE DRILLED 9-26-90 <br /> B-2 <br /> LOG OF EXPLORATORY <br /> CLIENT Mobil ai Corporation <br /> BORING LOCATION 500 E.Grantline Road,Tracy.CA ��-� <br /> - ' <br /> LOGGED BY�W.ShIPp APPROVED BY AW-2 <br /> FIELD SKETCH OF BORING LOCATION <br /> DRILLING METHOD C.M.E. 75,10" HSA HOLE DIAM. 10.5' <br /> See Attached SAMPLER TYPE Modified California Split Spoon <br /> CASING DATA 4'diameter, Schedule 40, PVC,5'solid,20'pert. <br /> TOP OF CASING ELEVATION 33.16'above msl DRILLER West Hazmat Drilling <br /> a ^, WATER LEVEL 21.79'above msl <br /> �• uu DATE 10-1-90 <br /> LL <br /> o v 0TWE 1134 his <br /> m S Co v DESCRIPTION <br /> Locking is Box <br /> o <br /> 0 <br /> Medium stiff,damp, brown Silt;trace sand. <br /> 4 BlankPVC <br /> g Casing <br /> 20 �.' ML Very stiff, moist, brown, sandy Silt. <br /> 4, 0 s <br /> 8 <br /> 10 : ' Q Stiff. saturated, brawn, sandy Sift. <br /> 10,10. :s % ; -- Z <br /> 10 12 0.020` <br /> 14 Slotted .' <br /> PVC <br /> s <br /> r <br /> Firm,,saturated, brown, sandy Silt. <br /> Casing <br /> 4.3.6 16 <br /> 18 <br /> 20 + Stiff, saturated. right brown, silty Clay; sandy. <br /> 5.6,11 <br /> zz CL <br /> 24 <br /> 3,4,6 2g Firm,saturated, light brown, silty Clay;trace sand. <br /> End Cap Total boring depth-26.5 feet <br /> 28 _ Stabirized water Level Q_ Water encountered during drilling <br /> _ <br /> 30 ® Portland Cement Sample submitted for laboratory analysis <br /> Sand#3 Lonestar (1] Driven sample <br /> r~f Bentonite Pellets <br /> E <br />