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SECOR Intemadlonal Incomo►nted Logged By� Dates Drilled Drilling Contractor Project Name Metho&T4uipinent Boring Number- 7/11/01 WEST ARCO#4932 CONTINUOUS CORE CM 7111101 HAZMAT STOCKTON,CA HSA SB-2 See"Legend to Logs"for Boring Surface Groundwater Depth(ft) Total Drive sampling method, Diam.(m) Elev(ft) $� 27 FIRST Depth(ft) wt(lbs} Dist() classifications and laboratory testing methods 8 NA 785 NA NA Well Description Construction 5 SII,TY SAND(SM).dark yellowish brown(10YR4/4),fine-grained sand,medium 8 dense,moist,moderate chemical odor(0,65,35,0) 144 30-- X o Sams as above,wet,moderate odor,fresh gasoline 158 SAND(SP) dark olive gray(5Y3/2),fine-to medium-grained,medium dense,wet, 444 strong chemical odor(0,100,0,0) 35 662 CLAYEY SILT(NII.).dark yellowish brown(10YR4/4),fine-grained sand,very 501 stiff,moist to dry,subangular blocky soil structure,faint chemical odor,top of zone at 34 40 38 5-39 5 feet is caliche rich(0,20,55,25) sa 19 SANDY SILT TO SILTY SAND(NRJSM):very dark grayish brown(2 5Y3/2), fine-grained sand,low plasticity,medium dense,wet,pronounced subangular blocky soil structure with wet fractures along structure,faint chemical odor(0,50,50,0) GROUT 45 173 248 The substrata descriptions above are generalized representations and based upon visual/manual classification of cuttings and/or samples obtained during drilling Predominant material types shown on the log may contain different matenals and the change from one predominant material type to another could be different than indicated Descriptions on this log apply only at the specific location at the time of drilling and may not be representative of subsurface conditions at other locations or times Project No 077 43286.330 Date 8/14/01 PR Log of Bonng 4932SB2 GPJ Approved by LOCI OF BOREHOLE Figure (sheet 2 of 4)