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GROUNDWATER <br /> TECHNOLOGY, INC. <br /> Monitoring Well 7 Drilling Log <br /> Project TPxarn/l-art. r Wad• Owner se-xaco Refini11g-&-1arkPt-inFrecaver�ed <br /> p <br /> Location Stockton Ca. Project Number 202/150-4150 <br /> Date Drilled 2/9/90 Total Depth of Hole 42 ft. Diameter--LQ-5-in— TE PLAN <br /> Surface Elevation Water Level lnitlal 38� ft•_24-hour <br /> Screen: Dla. 4 in. Length 20 ft. Slot Slze- .020 in. <br /> Casing: Dia. 4 in. Length 22 ft. Type PITC <br /> Drilling Company Sierra PACific Drilling Method- Hollow stem Angor <br /> Driller E. Fruehauf Log by M. Ostendorf o sample <br /> Geologist / Engineer E.K. Simonis License No. ' R.G. #4422 <br /> s _ <br /> 3 $ 3 Descrlptlon/SoftClassification <br /> g (Color, Texture, Structures <br /> 0 <br /> 6 inches concrete <br /> . Brown, sandy clay (moist, no product odor) <br /> 2 <br /> 0 <br /> 0 <br /> r... CL <br /> o` o. A <br /> 3 <br /> 6 o, ° 6 (grades medium stiff) <br /> 8 0 <br /> Light brown, silty clay (very stiff, dry, no product <br /> 0 B odor) <br /> 13 <br /> 0 <br /> 22 <br /> 12 0 <br /> e. o CL <br /> 1 4 :o C <br /> d �T ° 6 <br /> c 12 <br /> 18 Gray-bro�.rn, clayey silt (very stiff, moist, slight <br /> product odor) <br /> 20 <br /> 5 10 ML <br /> 15 <br /> 22 <br /> 24 (grades silty clay) <br /> .'.-�; CL <br /> 8/ba v c Page_ I of 7 <br />