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GSI GeoStrategies Log of Boring U-7 <br /> PROJECT Unocal Station No 0187 LOCATION 437 E Miner Avenue, Stockton, CA <br /> GSI PROJECT NO 482704 CASING ELEVATION 1175 feet above MSL <br /> DATE STARTED 7/20/95 WL (ft bgs) 435 DATE 7/20/95 TIME 1130am <br /> DATE FINISHED 7/20/95 WL (ft bgs) 4L11 DATE 7/31/95 TIME 830 am <br /> DRILLING METHOD 8 in hollow-stem auger TOTAL DEPTH 55 Feet <br /> DRILLING COMPANY Mitchell Drilling Environmental GEOLOGIST Steve Carter <br /> w <br /> cc <br /> z J WELL DIAGRAM <br /> Cxm <br /> CL N J GEOLOGIC DESCRIPTION <br /> Luw o o a < a <br /> a m cn can � m <br /> Pavement section - 4" concrete, 4-8" sand <br /> i v <br /> CL o;, <br /> U U <br /> CLAY (CL) - very dark gray (10YR 3/1), hard, dry to <br /> damp, 100% clay, color change to brown VOYR 5/3) <br /> 5 0 38 U7-5 at 4-4 5 feet <br /> becomes very stiff <br /> 10 0 18 U7-10 <br /> SILTY CLAY (CL) - yellowish brown (1OYR 4/4), <br /> hard, moist, 90-95% silt and clay, 5-10% fine sand, <br /> 15 0 33 U7-15 trace calcification <br /> 4 C <br /> V � <br /> � U <br /> EU <br /> EU `0 <br /> U � <br /> G] <br /> trace calcification <br /> 20 0 29 UT-20 <br /> N <br /> CLAY (CL) - light olive brown (2 5Y 3/4) to greenish <br /> 25 0 24 U7-25 gray (5GY 5/1), very stiff, moist, 100% clay <br /> color change to brown (10YR 5/3), fine sand to <br /> 30 5 30 U7-30 5-10X, trace calcification <br /> m <br /> a� <br /> b�4 <br /> color change to dark grayish brown (2 5Y 4/2), Y' <br /> 35 15 38 U7-35 becomes hard <br /> JOB NUMBER 4827 04 PagB ! of 2 <br />