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Advanced BORING LOCA <br /> GeoEnvironmental, Inc. BOREHOLE NO CPT-4 <br /> 837 Shaw Road, Stockton, CA 95215 <br /> `-- (209)467-1006 FAX (209)467-1118 TOTAL DEPTH 113 <br /> Project Thnfty Oil#171 Drilling Co Enviroprobe <br /> Site Location 1250 North Wilson Way Rig/Auger Type GeoProbe 5400/1 25" Probe Rods <br /> Stockton, California 95202 Logged By Christopher R Miller <br /> Reviewed By Donna Sexton <br />' Project No AGE-NC-03-1077 Date(s) Drilled 21 November 2003 <br /> Notes Ground water encountered at 72 0'below surface grade Water level during drilling Page 1 of 2 <br /> Ground water sampled Water level in completed well <br /> Sample Blows PID Sod USCS Class and <br /> Depth ID (per 6") (ppm) Symbol Sod Description <br /> 0 <br />' -5 <br />' -10— CPT-4-10 -- --- ML-CL Light brown,dry,CLAYEY SILT,No hydrocarbon(HC)odor, low toughness, <br /> low plasticity <br />' -15 <br /> - <br /> 20—- CPT-4-20 -- --- NIL-CL Light brown,dry, CLAYEY SILT,No HC odor,low toughness,low plasticity <br />' 2S- <br /> -30- <br /> - <br /> 5-30 CPT-4-30 --- --- ML-CL Orange brown,slightly moist,CLAYEY SILT,No i iC odor,low toughness,low <br /> plasticity <br /> -35 <br /> -40 <br /> - CPT-4-40 --- --- ML-CL Gray brown,slightly moist,CLAYEY SILT, HC odor,low toughness,low <br />' plasticity <br /> -45- <br /> -50 <br /> CPT-4-50 --- ML-CL Light Brown,moist,CLAYEY SILT,HC odor,low toughness,low to moderate <br /> plasticity <br /> t -55- <br /> -60- <br /> - <br /> 55-60 CPT-4-60 --- -- ML-CL Gray brown,moist,CLAYEY SILT,HC odor,moderate toughness, low <br /> plasticity <br /> ' -65 <br />