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GROUNDWATER _ <br /> TECHNOLOGY INC. <br /> Monitoring Well OW--4 Drilling Log 3 <br /> project._ PG & E / TRACYowner PACIFIC GAS do ELECTRIC CO. Sketch Map <br />*cation TRACY,CA Project Number 203-799--8258 <br /> Rote Drilled. 12/22/87 Total Depth of Hole 25 FT Diameter 10.5 IN I <br /> Wrface Elevation Water Level Initial 7 FT 24—hour <br /> Screen: Dia. 2 IN Length 20 FT Slot Sire .010 iN <br /> xtsing: Dia. 2 IN Length 5 FT Type PVC <br /> Sriliing Company SiERRA PACIFIC Drilling Method HOLLOW STEM AUGER <br /> hiller BEN HUNT Log by C. DeSOCIO Notes <br />*ologlst / Engineer License No. <br /> .. 3 <br /> e Description/Son Classification- <br /> (Col or,Text ure,Structures) <br /> O ol 3 Inch asphalt over 9 Inch base course <br /> A CL Dark brown siity clay with minor sand <br /> 2 (Medium stiff, slightly moist,. no product odor) <br /> B <br /> C (Grades lighter brown and mottled light brown) <br />- 4 ri o.o E: (Grades to clayey silt) } <br /> rr.. <br /> S F Light brown clayey silt with minor sand <br /> G (Soft, wet, no product odor) <br /> ML Encountered water 12/22/87 (1105 hours) <br /> 0.0 l 44 (Grades darker brown) <br /> 0.0 J J <br />. 10- .l <br /> o.0 K (Grades. with some course sand) <br /> 1 <br /> :fr 0.0 <br />- 12- r L 11 (Grades liner sand) <br /> f%} 0.0M 1 Brown silty sand <br />- 14- (Medium dense, wet, no product odor) <br />- 16 - <br /> 18- <br /> 16 18 r` '" Brown silty fine to course gravel with medium grained sand - <br /> : �'D 0 (Wet. medium dense, no product odor) <br /> N2 M <br /> 20 r'r (Grades leas silty) <br /> 0.0 0 (Grades less sandy) <br /> 22 rr Brown gravelly sand y <br /> 0.0 p % : <br /> 2 �• (Well graded, medium dense. wet. no product odor) <br /> 24- J :;SW <br /> 1 End of boring. Installed monitoring well <br />