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%Moe BORING NO. <br /> ALTON GEOSCIENCE, Inc. PROJECT NO. 30-136 DATE DRILLED 9-26-90 <br /> LOG OF EXPLORATORY a-1 <br /> _ CLIENT Mobil Oii Co ration <br /> BORING LOCATION S00 E.Grantline Road.Tracy,CA WELL NO <br /> ' .. AW-1 <br /> LOGGED BY W.Shi APPROVED BY <br /> FIELD SKETCH OF BORING LOCATION <br /> DRILLING METHOD C.M.E. 7S. 10- HSA HOLE DIAM. 10.5• <br /> See Attached SAMPLER TYPE Modified Caffornia Split Spoon <br /> CASING DATA 4'diameter,Schedule 40, PVC, 5'solid,20'perl. <br /> TOP OF CASING ELEVATION 32.9T above msl DRILLER West Hazmat Driftina <br /> Cr ., WATER LEVEL 21.32'above mal <br /> 06J u DATE 10-1-90 <br /> 3 F~ 4 °V �_ V TIME 1130 hrs <br /> a rY DESCRIPTION <br /> Locking is Box <br /> 0 <br /> 0 <br /> 2 <br /> 4 <br /> Blank Fill:dense,damp, brown, sandy Gravel;silty. <br /> 0 B siCasing s <br /> s: :f <br /> 8 -, <br /> 7,10,11 10 3E <br /> 12 :rML <br /> . . Very stiff, wet, light brawn Silt; trace sand. <br /> 14 <br /> ;S <br /> 8,12, 16 0.020' i; r; Hard, saturated, light brown, silty Clay;trace sand. <br /> slotted :+ <br /> PVC <br /> 1$ Casing <br /> 20 t- CL <br /> 3,8,14 Very stiff, saturated. light brown,silly Clay;trace sand. <br /> -22 <br /> 24 <br /> Very stiff. saturated, light brown,silty Clay;slight sand. <br /> 10,13. <br /> 2s <br /> 15 End Cap Total boring depth-26.5 feet <br /> 28 SZ Water encountered ging drilling <br /> _ ed W <br /> � Stabilizater level _ <br /> 30 p0djand Cement N Sample submitted for laboratory analysis <br /> Sand#K3 Lonestar m ©riven sample <br /> i Bentonite Pellets <br />