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Drilling Log <br /> ITIT CORPORATION Monitoring Well MW-4A <br /> A Member of the Ir Group <br /> Project 7-Eleven, SS# 19976 Owner 7-Eleven, Inc. <br /> Location 1399 N. Main Street, Manteca CA Pro!.No. 779956 <br /> c <br /> vip L 2 <br /> Description <br /> OL oQ � a v U <br /> 0) Cdo. <br /> N (Color, Texture, Structure) <br /> U N m CD <br /> x in Trace < 10%, Little 10% to 20%, Some 20% to 35%. And 35% to 50% <br /> - 24- 1 15 <br /> < �,S <br /> 26 < < <br /> < < CL Grades silty sandy CLAY. <br /> 28 ` 0.0 MW-4A@28' 20 Sw Medium to coarse SAND: brown, wet, loose, subrounded, no <br /> < < hydrocarbon odor. Recovery at 50%. <br /> 6 <br /> 30 ` C <br /> Sandy silty CLAY (20,30,50): grayish brown, moist, stiff, no <br /> hydrocarbon odor. <br /> 32 . . SM <br /> < < 0.0 s <br /> MW-4A@33' 11 Recovery at 85%. <br /> 34 23 Silty SAND (40,60): brown, wet. <br /> sw Medium to coarse SAND: light-gray-brown, wet, loose, subrounded, <br /> < < no hydrocarbon odor. <br /> 36 <br /> 38 r < 0.0 MW-4A@38' 8 Recovery at 90%. <br /> 19 SILT and fine SAND (40,60): brown, wet. <br /> < < 50 <br /> 40 i <br /> < <br /> 42 ML Grades gray. <br /> 0.0 MW-4043' 4 Recovery at 90%. <br /> 44 4 1s <br /> 46 <br /> 48 CL Sandy, silty CLAY (20,30,50): wet. <br /> 1.0 MW-4A@48' 7 Recovery at 95%. <br /> 50 — a <br /> 15 SM Silty fine SAND (20,$0): brown, loose, no hydrocarbon odor. <br /> 52 Sw Grades medium SAND. <br /> 54 <br /> 56 <br /> 07/21/19991ithlog-Mar.99 Page: -2 of 2 <br />