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cc GeoStrategiesr Inc. Log of Boring U-2 PROJECT FORMER UNOCAL STATION #0167 LOCATION 437 E Miner Avenue, Stockton, CA GSI PROJECT NO 4827703 CASING ELEVATION 1146 (MSL) DATE STARTED 7/7/94 WL (ft bgs) 51 DATE 7/7/94 TIME 1357 DATE FINISHED 7/7/94 WL (ft bgs) 4713 HATE 7/8/94 TIDE 1422 TOTAL DEPTH 60 Feet DRILLING METHOD 8 ,n Hollow Stem Auger GEOLOGIST Steve Carter DRILLING COMPANY West Harmat Drilling w WELL DIAGRAM x o E W zin GEOLOGIC DESCRIPTION CL LULU X U ix- x Q "J' 0 4i MCr m (A CL I1 28 U2-80 CLAY (CL) - dark yellowish brown (10YR 414), very stiff, damp to moist, low plasticity, 90-95% clay, 5-10% fine sand a moist a 10 3 23 U2-10 5 0 `c a � S2 b u clay increases to 100% w 15 0 41 U2-15 5 �' c becoming hard, sand increases to 30-35% fine sand ' N 20 p 33 11.12-20 5 in bottom tube SANDY CLAY (CL) - olive gray (5Y 4/2). stiff, moist, ;o 25 3 26 U2-25 5 medium Plasticity, 100% clay color change to brown (10YR 512), mottled or 30 0 47 U2-30 5 streaked with olive gray (5Y 4/2), hard color change to dark very st ff. streaish brown (2 5Y ked wiitth reeolive gray (5Y 4/2) 121. 35 5 27 U2-35 5 - ti color change to very dark gray (5Y 3/1), low o plasticity 80-65% clay, 35-40% fine sand, faint o — 40 9 35 1.12-40 5 �, Sp product odor �, _ 10 SAND (SP) - brown (lOYR 5/3), very debse, moist, — p 51 U2-44 0 CL 90% fine sand, 10% clay, prod uct odor m 45 0 51 U2-45 5hard, ' CLAY (CL) - black ( fam 5/1), moist, low ru plasticity, t00% clay, o 18 32 U2-48 5 very stiff to hard, low to medium plasticity, 5-10% 50 6 43 U2-50 0 fine sand, product odor, color change to dark greenish brown (2 5Y 4/2), hard, low plasticity, 100% N clay at 48 7 feet — 5� 6 72 U2-55 0 color change to dark greenish gray (5GY 411) l0 5" SC CLAYEY SAND ) SF L saturated, 80-85% fine mediumsan/d,) dense, 15-20% t 60 4 70 U2-60 0 clay - (x - converted to equivalent standard penetration - 65 blows/ft) 70 L Page 1 of JOB NUMBER 4627 703