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�S! GeaStrateg}es, Inc. Log of Boring U-2 PROJECT FORMER UNOCAL STATION *0187 LOCATION 437 E Miner Avenue, Stockton, CA GS1 PROJECT NO 4827 703 CASING ELEVATION 1146 (MSL) DATE STARTED T/T/94 WL (ft bgs) 51 DATE 7/7/94 TIME 1357 WL (ft bgs) 4713 DATE 7/8/94 TIME 14 22 DATE FINISHED 7/7/94 TOTAL DEPTH 60 Feet DRILLING METHOD 8 in Hollow Stem Auger GEOLOGIST Steve Carter DRILLING COMPANY West Harmat Drilling w WELL DIAGRAM M ~ n m �- z a GEOLOGIC DESCRIPTION n w w r. v x 0.a J 0- o a a o m co CL CLAY (CL) - dark yellowish brown (IOYR 4/4). very 5 1t 28 U2-60 stiff,damp to mast. low plasticity. 00-95% clay, 5-10Z fine sand moist a 10 3 23 U2-10 5 c v °1 e a, w � u o clay Increases to 100% °f U C 15 0 41 U2-15 5 L2 becoming hard, sand increases to 30-35% fine sand 20 0 33 U2-20 5 in bottom tube SANDY CLAY (CL) - olive gray (5Y 4/2), stiff, maast, m o 25 3 26 U2-255 medium Plasticity, 100% clay color change to brown (10YR 5/2),mottled or 30 0 47 U2-30 5 streaked with alive gray {5Y 412}, hard = color change to dark greenish brown (2 5Y 4/2), 35 5 27 U2-355 very stiff, streaked with olive gray (5Y 4/2) color change to very dark gray (5Y 3/1),low y plasticity. 60-85% clay,35-40X fine sand, faint o 40 9 35 U2-405 �, Sp product odor m SAND (SP1 - brown (IOYR 5/3), very debse, mast, a a a n+ 0 51 U2-44 0 CL 90X fine santl, fOX clay, product o m +� 45 0 51 U2-45 5ck h plast�cityCLAY t1100%aclay, faint product lax 18 32 U2-48 5 s 8 43 112-50 0 very stiff to hard, low to medium plasticity, 5-tOX a 50 fine sand, product odor, color change to dark greenish Drown I2 5Y 4/2) hard low plasticity, 100% N clay at 48 7 feet �� g 72 U2-55 0 color change to dark greenish gray (5GY 4/1) t0 5" SC CLAYEY SAND (SC) - black (2 5Y N2915-20% 60 4 70 U2-60 0 saturated, 60-85% fine to medium sanclay (m - converted to equivalent standa 65 blows/ft) 70 Page 1 JOB NUMBER 4827 703