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R <br /> GSI GeoStrategies Log of Boring U-4 <br /> PROJECT Unocal Station No 0187 LOCATION 437 E Miner Avenue, Stockton, CA <br /> GSI PROJECT NO 482704 CASING ELEVATION 1171 feet above MSL <br /> DATE STARTED 7/!9/95 WL (ft bgs) 435 DATE 7/19/95 TIME 354pm <br /> DATE FINISHED 7/19/95 WL (ft bgs) 4208 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 /> LU <br /> M <br /> ~ (1) <br /> - w WELL DIAGRAM <br /> � z <br /> = Q LU J a _j GEOLOGIC DESCRIPTION <br /> cn _jQ.LLI q o X M a d <br /> � 'a m tan En Cr <br /> CL <br /> kw <br /> o� <br /> U U <br /> CLAY (CL) - dark brown (7 5YR 3/2), very stiff, <br /> 0 18 U4-5 damp, 95-100% clay, 0-5% fine to medium sand <br /> color change to yellowish brown (TOYR 5/6), sand <br /> 10- 4 21 U4-10 Increases downward in sample to approximately 20% <br /> becomes damp to moist, sand decreases to 5-10% <br /> 15 5 20 U4-15 <br /> 4 C <br /> h <br /> Cb <br /> QY 4 <br /> b ` <br /> t m <br /> U C <br /> SC CLAYEY SAND (SC) - yellowish brown (10YR 5/6), x <br /> 20 0 20 U4-20 medium dense, moist, 70% fine sand, 30% clay ro <br /> Q <br /> N <br /> ,f CL <br /> CLAY (CL) - olive brown (2 5Y 4/4), hard, moist, <br /> 25 4 27 1.14-25 100% clay, minor oxide staining <br /> color change to dark yellowish brown (10YR 4/4), <br /> fine sand to 30-40%, decreasing downward in <br /> 30 0 30 U4-30 sample to 10% <br /> - , � <br /> CU <br /> ad <br /> color change to olive brown (2 5Y 4/4), oxide x N <br /> 35 0 34 1.14-35 1 staining <br /> JOB NUMBER 462704 Page 1 of 2 <br />