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Drilling Log <br /> �J -'! GROUNDWATER Soil Boring SB-7 <br /> DDDI TECHNOLOGY <br /> See Site Map <br /> Prosect Chevron - S. Center. Srocktorowner Chevron USA Products COMB" For Boring Location <br /> Location 139 South Cenre' St. S:ookte^. CA Proi. No. 02070 0066 <br /> Surface Elev. Total Bole Depth 455 ft. Diameter 9 +n• COMMENTS: <br /> Top of Casing Water Level Initial Static 37.3 It. <br /> Screed: Dia Length Type/Size <br /> Casing: Dia Length Type <br /> Fill Material Neat Cement Rig/Core Mobile E-61/Sa1rt-SDoon <br /> Drill Co. Greco Drilling Method Hollow-Stem buaer <br /> Driller R1Ch I Log By Brian MGA1oor Date 11/29/95 Permit # 7999 <br /> Checked By Ed Srmonrs License No. PG,14ti22 <br /> s� U A Description <br /> pE v o 'v srn Ei <br /> D. 4 a 0 <br /> U 0 V saw N (Color, Texture, Structure) <br /> r= i ¢ <br /> V) pp I ra I j I Trace < LOX, Little 10% to 20%. Some 20X to 35%. And 35% to 50% <br /> x <br /> Asphalt. <br /> Silty CLAY: brown. <br /> 2 i <br /> CL <br /> (grades red) <br /> 4 (grades brown) <br /> i 15 Sandy silty CLAY (20,20.60): brown, day to aamo, no hydrocarbon odor. <br /> 6 � a6 s�-� 2s <br /> 0.7 �-e.5' <br /> CL k <br /> 8 <br /> 10 v <br /> Silty CLAY (30.70); brown, dry to damp, no hydrocarbon odor. <br /> 1 I <br /> cEj-7 26 CL12 <br /> I <br /> I <br /> { � I Sandy silty CLAY (20.30,50): brown, dry, no Hydrocarbon odor. <br /> I s <br /> 1 tD <br /> 16 �, se s <br /> 0 <br /> I <br /> 20 <br /> ¢ _7 @/ <br /> 22 I G I ?:-� <br /> i <br /> 24 <br /> pace- I o' <br />