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ALTON GEOSCIENCE, Inc. EURO NO. <br /> PROJECT NO. 30-136 DATE DRILLED 9-26-90 <br /> LOG OF EXPLORATORYCLaENT Mobil Oil Corporation B-1 <br /> A <br /> BORING LOCATION 500 E. Grantline Road,Tracy,CA WEV-NO• <br /> LOGGED BY_ W.Shipp __ APPROVED BY AW-1 <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'part. <br /> TOP OF CASING ELEVATION 32.97 above msl DRILLER West Hazmat Drilling <br /> g WATER LEVEL 21.32'above msl <br /> tx A & DATE 10-1.90 <br /> i Q 6 1.1a TIME 1130 hrs <br /> `Y U 3: DESCRIPTION <br /> Locking Gbris ;Box <br /> Q 1 `� <br /> 0 <br /> 2 <br /> 4 Blank Fill:dense.damp, brown, sandy Gravel;silty. <br /> 06 Casing Cng <br /> v t S <br /> 0 <br /> 10 <br /> 7,1 0,1 1 •�• i : X <br /> 12 r,' M <br /> Very stiff,wet, Eight brown Silt; trace sand. <br /> 14 _ <br /> 8,129 16 0.020" ' Hard.saturated, light brown, silty Clay;trace sand. <br /> J slotted <br /> 18 PVC 5; <br /> Casing t° <br /> 3,8,14 20 CL <br /> � r` <br /> Very stiff, saturated, light brawn, silty Clay;trace sand. <br /> 22 <br /> 24 <br /> I 10,13, 26 10-100 <br /> Very stiff, saturated, light brawn, silty Clay;slight sand. <br /> 15 End Cap Total boring depth-26.5 feet <br /> 28 <br /> = Stabilized Water Level Q Water encountered during drilling <br /> • 30 <br /> Portland Cement N Sample submitted for laboratory analysis <br /> Sand#3 Lonestar ❑] Driven sample <br /> r"+r Bentonite Pellets <br />