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4 <br /> Total depth of boring, 75 ft Diameter of boring. 10 in Date drilledo 10/1 1/91 <br /> . Casing diameter, NA Lengtlu NA Slot size, NA <br />' Screen diameter, NA Length: NA Material type: NA <br /> Drilling Companyii JCON Exploration Driller, Jim, Greg <br /> Method Used, Hollow—stem Auger Field Geologist, Richard Alden <br /> Signature of Registered Professional, <br /> Registration No.: 43139 State, Calif <br /> DEPTH SAMPLE CO P.I.D. USCS DESCRIPTION WELL <br /> NO. CODE COltST <br /> 0 Asphalt - - <br /> 2 <br /> 4 <br /> 6 S-5 55 320ML Silt, light olive gray, slightly damp, hard <br /> pprnv8 <br /> 10 .� <br /> S-10 45 187 Pale olive mottled along root structures with dark <br /> ppmv yellowish orange <br /> 12 ' <br /> 14 - <br /> 16 S-15 61 ppmv <br /> is <br /> 2Q <br /> S-20 53 178 ppmv Very pale orange <br /> ; <br /> (section continues downward) <br /> LOG OF BORING: B-7 PLATE <br /> ���M�/�/■� ARCO Service Station No. 6100 <br /> 25775 South Patterson Pass 7 <br /> RLE NO Tracy, California <br /> PROJECT NO. 30041-2 0041B4A <br /> I <br />