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i aGeoStrategies, Inc. Log of Boring U-1 PROJECT FORMER UNOCAL STATION 00187 LOCATION 437 E Miner Avenue, Stockton, CA GSI PROJECT NO 4827 703 CASING ELEVATION 1180 (MSL) DATE STARTED 7/7/94 WL (ft bgs) 48 DATE 7/7/94 TIME 1717 DATE FINISHED 7/7/94 WL (ft bgs) 4774 DATE 7/8/94 TIME 1451 DRILLING METHOD 8 in Hollow Stem Auger TOTAL DEPTH 55 Feet DRILLING COMPANY West Hazmat Drilling GEOLOGIST Steve Carter w * ol o WELL DIAGRAM CL = w 0 GEOLOGIC DESCRIPTION J S CJ 0. 0. d a .�. w a a cc o o a m (n cnco V) CL 5 0 48 UI-6 5 CLAY (CL) - very dark brown 00YR 2/2), hard, dry to damp, 100% clay 0 28 U l-8 0 10 color change to dark brown OOYR 3/3) at 7 feet, very stiff, damp to moist 0 25 01-115 S m °1 U b �5 0 38 U1-16 5 hard, trace to 59 fine sand SP-SC ro Cj 20 0 25 UI-215 ' SAND WITH CLAY (SP-SC) - yellowish brown (10YR 5/6), dense, most, 90-96% fine to medium sand, CL 5-10X clay G 4 6 25 ' CLAY (CL) - dark grayish brown (2 5Y 4/2), very 2 23 Ul-265 stiff, moist, low to medium plasticity, 100% clay, - - faintly streaked and mottled with Fe-oxide slams 30 4 33 U1-315 color change to yellowish brown (IOYR 5/6), lightly -- mottled, gray (2 5Y N6/0), hard 35 color change to dark grayish brown (2 5Y 4/2). low =_ = o 0 36 U1-36 5 plasticity, 10-15% fine sand o = H CD = a SC = a U = � 40 CLAYEY SAND (SC) - olive gray (5Y 5/2), dense, 5 35 U1-415 moist, 65-70% fine to medium sand, 30-35% clay Zi 45 / color change to dark gray (5Y 4/1) 20 30 UI-46 5 rU / SP _ 50 s� SAND (SP) - very dark gray (2 5Y N3/0), very 8 78 Ut-515 dense, saturated, 85-100X fine to medium sand, _ 0-5X rounded fine gravel, trace clay, trace coarse _ sand 55 73 54 U1-55 0 CL CLAY (CL) - dark greenish ray (5GY 4/1), hard, moist, low to medium plasticity, 100X clay, lightly mottled with Fe-oxide staining 60 ( - converted to equivalent standard penetration blows/ft) • s5 70 JOB NUMBER 4827 703 Page I of 1