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% IMOM <br /> ME= <br /> - MY-E <br /> T <br /> ALTON GEOSCIENCE, Inc. PROJECT NO. 30-136 DATE DRILLED 9.26.90 BORING NO, <br /> LOG; OF EXPLORATORY CLIENT Mobil Oil Co ration $ 1 <br /> BORING - <br /> LOCATION 500 E.Grantline Road,Tracy,CA WELLNO. <br /> LOGGED BY W.Shipp APPJ�OVE; BBY AW-1 <br /> FIELD SKETCH OF BORING LOCATION <br /> DRILLING METHOD C.M.E. 75,10" HSA HOLE DIAM. 10.5' <br /> See Attached — <br /> SAMPLER TYPE Modified California Split Spoon <br /> TOP O:;CASING ELEVATION 32.9T above msl CASING DATA 4"diameter,Schedule 40,PVC,5'soW,20'Pori. <br /> DRILLER West I-lazmat Drilling <br /> Cr <br /> o WATER LEVEL 211.32'above msl <br /> UJ <br /> G o R w DATE 10-1-90 <br /> .a �. A TIMEEE 1130 hrs <br /> m $ ~r10 <br /> DESCRIPTION <br /> - 0 Locking rist Box <br /> 0 <br /> 2 <br /> 4 <br /> Blank <br /> 0 PVC Fill:dense,damp,brown,sandy Gravel;silty. <br /> 6 <br /> Casing <br /> g <br /> 0 <br /> io <br /> 12 �stiff,wet light brown Silt; trace sand. <br /> 14 <br /> 9,12,4 16 0.020' Hard,saturated,light brown,silty Clay;trace sand. <br /> slotted <br /> 1 ti PVC <br /> Casing <br /> 20 CL <br /> 3,8,14 <br /> '•i Ve stiff,saturated light brown,silty <br /> 22 't ry 9 . f<y Clay;trace sand. <br /> 24 <br /> 10,13, 26 Very stiff,saturated, light brown,silty Clay;slight sand. <br /> End Gap.. <br /> Total boring depth 26.5 feet <br /> 28 <br /> Stabilized Water Level SZ Water encountered during drilling <br /> 30 - <br /> Portland Cement Sample submitted for laboratory analysis <br /> Sand#3 Lonestar [O Driven sample <br /> y r}r. Bentonite Pellets <br />