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ALTON GEOSCIENCE, Inc. FPe7� <br /> JECT NO. 30.136 DATE DRI _ �iror <br /> LOG OF EXPLORATORYD 9'� 90 <br /> BORING NT_ _ Mobil Oil Corporation _ J"t <br /> mi CATION 500 E Grantline Road,Tracy.CA <br /> WHLW <br /> LOGGED BY W.Shipp APPROVED BY� AWS , { <br /> FIELD SKETCH OF BORING LOCATION <br /> DRILLING METHOD C.M.E. 75 HOLE DfAM. 105' <br /> See Attached SAMPLER TYPE Modified California Split Spoon �~ <br /> CASING DATA 4'diameter,Schedule 40, PVC,51, <br /> solid,20' _ <br /> TOP OF CASING ELEVATION 32.62'above msl DRILLER West Hazmat Drillirt rf <br /> WATER LEVEL 21.20'above mal <br /> _ w <br /> J '� DATE 10-1-90 <br /> U. <br /> o Q g TIME 1130 hrs <br /> ,Y C I Q DESCRIPTION <br /> Locking kris Box <br /> 0 <br /> 2 <br /> 4 Blank <br /> PVC .+ Fill:dense,damp, brown, sandy Gravel;silty. <br /> 6 Casing <br /> 0 8 <br /> 10 .j <br /> 10.5,7 ° . <br /> 12 Stiff, saturated, brown, sandy Silt. <br /> 0.020" <br /> 14 Sloted �' a <br /> PVC <br /> Casing ;t <br /> 12.3,4 16 SP Loose,saturated,gray, medium-grained Sand;trace rounded gravels to 2 . <br /> 18 <br /> 20 <br /> 5.10.12 Very stuff, saturated, light brown, si ty Clay. <br /> -22 <br /> 1 <br /> CL <br /> 24 <br /> 7,20,1 Very stiff, saturated, light brown Clay;silty and sandy. <br /> zs End Cap . <br /> 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 /> 0 Sand#3 Lonestar m Driven sample <br /> r�r bentonite Pellets <br />