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LOG OF EXPLORATORY BORING <br /> PROJECT NUMBER C42-01.10 BORING NO. PS/WC-2M <br /> PROJECT NAME Port of Stockton PAGE 2 OF 2 <br /> BY M. Capps DATE 7/23/92 SURFACE ELEV. 2.4 ft. <br /> RECOVERY PID N LITHO- WELL <br /> J ka W <br /> W F-[y J GRAPHIC DESCRIPTION DETAIL <br /> d'¢W L COLUMN <br /> (ft/ft) (PP-) ( J N <br /> 3.7/5.0 wet. <br /> SILTY CLAY(CL),gray to grayish brown(2.5Y, <br /> 1.7 5/2),90%low plasticity fines; 10%fine sand; <br /> iron and manganese oxide staining;stiff. <br /> @ 18.7': 1-inch thick sandy clay interbed. <br /> SILTY SAND(SM),dark brown(10YR,4/3);35% <br /> low plasticity fines;65%fine sand,wet,no <br /> hydrocarbon odor. <br /> SANDY SILTY CLAY(CL),dark brown(10YR, <br /> 3.4/5.0 1.0 25 4/3),70%low plasticity fines;30%fine sand; <br /> iron and manganese oxide staining;wet; no <br /> 2.8 . . hydrocarbon odor. <br /> @ 242-24.5': thin caliche layers(hardpan); <br /> semi-lithifred,laminated(<1 cm,typically 3-5 <br /> mm thick); moist <br /> SAND(SP),dark brown(10YR,4/3); 15%low <br /> plasticity fines;85%fine sand with trace medium <br /> sand. <br /> CLAY(CL),grayish brown(2.5Y,5/2),90% low <br /> 3.8 30 plasticity fines; 10%fine sand;manganese oxide <br /> staining;occasional caliche;hard;damp. <br /> CLAY(CH),gray(2.5Y,N5/0), 100%high <br /> plasticity fines,iron and manganese oxide <br /> staining,damp. <br /> @ 30.8': silty clay,wet. <br /> SANDY CLAY(CI),gray(2.5Y,N5/0),60%high <br /> plasticity fines;40%fine sand; wet. <br /> 35-4BORING TERMINATED AT 35 FEET. <br /> 40 <br /> EQREMARKS <br /> See Explanation of Symbols.Boring was drilled using 8-and 12-inch diameter,continuous-flight,hollow-stem auger <br /> drilling equipmeuL Boring was sampled using a 2-inch diameter,wire-line conveyed,split-barrel continuous sampler. <br /> See Well Details for well conaructim information. <br /> ASSOCIATES <br />