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i <br /> UUMIM SAMPLE P.I.D. USCS DESCRIPTION WELL <br /> DEPTH NO. CODE CONST. <br /> 20 5-20 27 237MI/CI Clay silt/silty clay, greenish olive, dry, medium plasticity, very stiff <br /> ppmv <br /> 22 <br /> I 24 <br /> 26 5-25 31 PPmv MI Silt trace clay, light olive gray, dry, non—plastic, very stiff <br /> 28 <br /> _ 30— S-30 28 ppgmv <br /> 32 <br /> I <br /> 34 <br /> 36 5-35 26 ppmB <br /> 3$ <br /> _ 40 - 5-40 750 275 Sm Silty sand, fine—grained sand moderate brown, dry <br /> ppmv (well consolidated) <br /> 42 Boring terminated at 41-1/2 feet to construct <br /> vapor—extraction well <br /> — 44 - <br /> - 46 - <br /> - 48 — <br /> _ 50 - <br /> - 52 — <br /> I <br /> 48 <br /> 50 <br /> 52 <br /> LOG OF BORING: B-21/VW-11 PLATE <br /> K=AWWWAVMS ARCO Service Station No. 6100 <br /> 25775 South Patterson Pass 7 <br /> FILE NO Tracy, California <br /> PROJECT NO. 30041 004105B <br /> I <br />