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BORING NO. <br /> ALTON GEOSCIENCE, Inc. PROJECT NO. 30-136 DATE DRILLED 9-26-90 B-4 <br /> LOG OF,EXPLORATORY B-a <br /> CLIENT Mobil OiR C.o�o�ation _ <br /> BORING ��;:•a LOCATION 500 E.Grantline Road, Tracy , CA WELL NO. <br /> LOGGED BY- W.Shlpp_ APPROVED BY AW-4 <br /> FIELD SKETCH OF BORING LOCATION <br /> DRILLING METHOD C.M.E. 75, HSA HOLE DIAM. 10.5' <br /> See Attached SAMPLER'TYPE Moddied California Split Spoon <br /> CASING DATA 4'diameter, Schedule 40,PVC,5'solid, 20'pqrf. <br /> TOP OF CASING ELEVATION 32.67'above msl DRILLER West Hazmat Drilling <br /> ,.; WATER LEVEL 21.68'above msl <br /> I € ' DATE 10-1-90 <br /> C61130TIME 1130 hm <br /> chi cr 3 v DESCRIPTION <br /> Locking Chris. .Sox <br /> 0 0 <br /> s.,. <br /> 2 <br /> .;: <br /> Stiff, moist, light brown, sandy Silt. <br /> 14 Blank <br /> i PVC .00 <br /> 5.9.10 6 <br /> Casing Stiff, moist, light brown, sandy Silt <br /> 0 <br /> g <br /> 10 <br /> 5,14,2 = <br /> 12 Very stiff,wet, light brown, sandy SilL <br /> 0.020' <br /> Slotted ' <br /> 14 PVC <br /> 1 2.5,7 16 Casing : _:' Stiff, saturated, light brown, silty Clay. <br /> ti• <br /> 18 , <br /> :f <br /> 20 Very stiff. saturated, light brown,silty Clay. <br /> i 6,11.1 <br /> 22 CL <br /> 24 <br /> Very stiff, saturated, light brown, silty Clay. <br /> 3.14, 26 <br /> End Cap Total boring depth.26.5 feet <br /> 28 <br /> = Stabilized Water Level Q Water encountered during drilling <br /> 30 <br /> Portland Cement Sample submitted for laboratory analysis <br /> Sand#3 Lonestar [t] Driven sample <br /> r•r Bentonite Pellets <br />