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LEGEND TO BORING LOG PROJECT NO. 30-0136 <br /> FORMER MOBIL BULK PLANT 04343 <br /> ` 500 E. GRANTLINE ROAD <br /> ' TRACY, CALIFORNIA <br /> April 3, 4992 <br /> UNIFIED SOIL CLASSIFICATION SYSTEM(USCS) <br /> GW Well-graded gravels, gravel-sand mixtures, little or no fineE <br /> GRAVELSGP Poorly-graded gravels, gravel-sand mixtures <br /> J than 112 -w.:. <br /> J of <br /> more <br /> coarse fraction .2 � .' GM Silty gravels, gravel-sand-silt mixtures <br /> N > No. 4 Sieve r <br /> WCL_ GC Clayey gravels, gravel-sand-clay mixtures <br /> Z <br /> SW Well-graded sands, gravelly sands, little or no fines <br /> C'i `o <br /> W SANDS Sp Poorly-graded sands, gravelly sands, little or no fines <br /> Wmore than 1P2 of J zIx <br /> coarse fraction M7o�J <br /> Q No. 4 Steve <br /> Q SM Silty sands,sand-sift mixtures <br /> V 2 <br /> F SC Clayey sands, sand-clay mixtures <br /> SILTS AND CLAYS ML Inorganic silts and very fine sands, rock flour, silty or <br /> Liquid limit<5o clayey fine sands or clayey sifts with slight plasticity <br /> 0 CL Inorganic clays of low to medium plasticity, gravelly clays, <br /> y sandy clays, silty clays, lean clays <br /> 1 <br /> OL Organic silts and organic silty clays of low plasticity <br /> W <br /> Z <br /> MH Inorganic silts, micaceous or diatomaceous fine sand or <br /> Q SILTS AND CLAYS silty soils <br /> W Liquid limit>50 CH Inorganic clays of high plasticity,fat clays <br /> Z_ <br /> OH Organic clays of medium to high plasticity, organic silts <br /> HIGHLY ORGANIC SOILS PE Peat, humus, swamp soils with high organic contents <br /> SYMBOL LEGEND: <br /> g No recovery <br /> Portland Cement <br /> Sample saved for possible analysis <br /> #2116 Monterey Sand <br /> Stabilized water level <br /> �V 13entonite Pellets <br /> v Ground water level encountered during drilling <br /> Sampling Interval ppm=parts per million <br /> fbg=feet below grade <br /> I• ALTON CGI =Combustible gas indicator <br /> A% <br /> GEOSCIENCE TPH-G=Total petroleum hydrocarbons as gasoline <br /> TPH-D=Total petroleum hydrocarbons as diesel <br /> Pleasanton,California msl=mean sea level <br />