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GS' GeoStrategies, Inc. Log of Boring U-1 • PROJECT FORMER UNOCAL STATION, 0187 LOCATION 437 E Miner Avenue, Stockton, CA GSI PROJECT NO 4827703 CASING ELEVATION 1160 (MSL) DATE STARTED 7/7/94 HL (ft bgs) 48 DATE 7/7/94 TIME 1717 DATE FINISHED 7/7/94 HL (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 m x ►- o cn WELL DIAGRAM a W w �_ � GEOLOGIC DESCRIPTION 2 n fn J J 2 U 1^ d Q d ui y of a a Q O a a m in in in CL XX 5 0 48 U1-6 5 CLAY (CL) -- very dark brown (1OYR 2/2), hard, dry to damp, 100% clay 0 26 U1-8 0 '� color change to dark brown 00YR 3/3) at T feel. 0 25 U1-115 very stiff, damp to moist o v e _m U (13 a 0 36 Ui-16 5 hard, trace to 5% fine sand c SP-SC 20 J 0 � � SAND WITH CLAY (SP-SC) - yellowish brown (10YR 25 U1-21.5 • I 5/6), dense, most, 90-95% fine to medium sand. CL 5-10% clay G°i 25- 2 23 U1-28 5 CLAY (CL) -- dark grayish brown (2 5Y 4/2), very stiff, moist, low to medium plasticity, 100% clay, - faintly streaked and mottled with Fe-oxide stains 30 4 33 UI-3L5 color change to yellowish brown {iOYR 5/6}, lightly mottled, gray {2 5Y NB/0}, hard = 35 color change to dark grayish brown (2 5Y 4/2), low - 0 36 UI-38 5 plasticity, 10-15% fine sand o SC ti b _ n 40- 5 35 UI-415 / CLAYEY SAND (SC) - olive gray (5Y 5/2), dense, most, 65-70% fine to medium sand, 30-35% clay a / N ~ 45 20 30 U1-465 / color change to dark gray (5Y 4/1) _ o / — u SP 50 9 T8 Ui-515 SAND (SP) - very dark gray (2 5Y N3/0), very dense, saturated, 95-100% fine to medium sand, _ 0-5% rounded fine gravel, trace clay, trace coarse 55 73 54 Ui 55 0 CL sand CLAY (CL) - dark greenish gray (5GY 4/1) hard, moist, low to medium plasticity, 100% clay, lightly mottled with >=e-oxide staining 60 (m - converted to equivalent standard penetration blows/ft) 65- 70- 570 JOB NUMBER 4827703 Page I of I