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i <br /> BORING NO. <br /> ALTON GEOSCIENCE, Inc. PROJECT NO. 30-136 DATE DRILLED-9-26-90 B-1 <br /> LOG OF EXPLORATORY CLIENT Mobil Oil Corporation <br /> BORING 500 E.Grantline Road,Tracy,CA WELL <br /> LOCATION <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. 10.6* <br /> See Attached SAMPLER TYPE Modified California Split Spoon <br /> ANN <br /> CASING DATA 4'diameter,Schedule 40, PVC, 5'solid,20' ed. <br /> TOP OF CASING ELEVATION 32.9T above msl DRILLER West Hazmat Drilling <br /> WATER LEVEL 21.32'above msl <br /> o <br /> w16L„ DATE <br /> 10-1-90 <br /> o ~o CL a- — � LL TIME 1130 hrs <br /> J <br /> 3--Q 1 = $ DESCRIPTION <br /> Locisty Box <br /> 0 <br /> 2 <br /> 4 Blank Fill:dense,damp, brown, sandy Gravel;silty. <br /> 0 PVC <br /> 5 Casing <br /> :r <br /> 8 <br /> 0 <br /> 10 Q <br /> 7,10,11 — 3E <br /> 12 ML t <br /> Very stiff, wet, light brown Silt; trace sand. <br /> 14 <br /> 8,12, 16 0.020' Hard, saturated, light brown, silty Clay;trace sand. <br /> slotted <br /> 18 Casing <br /> 20 CL <br /> 3,8,14 Very stiff, saturated, light brown, silty Clay;trace sand. <br /> 22 <br /> 24 <br /> Very stiff, saturated, light brown, silty Clay; slight sand. <br /> 10,13, 26 <br /> 15 End Cap Total boring depth-26.5 feet <br /> 28 3E Stabilized Water Level Q Water encountered during drilling <br /> _ <br /> 30 Portland Cement Sample submitted for laboratory analysis <br /> Sand#3 Lonestar Driven sample <br /> i~f Sentonde Pellets <br />