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U712 <br /> Monitoring Well MW-3 <br /> project Chevron/S. Center per Chevron U.S.A. . Inc. Drilling Log <br /> Location -139 S. Center, Stockton, CA prom Number 203 175 .3291.01 <br /> Date Drilled 2/15/91 Total Depth of Hole 60.0 ft. Diameter B-25 in. See S1te Asap <br /> Surface Elevation Mater Level Initial Q8.0 ft. 24-hour 44.87 ft. For boring Location <br /> Screen Dia 2.0 in. Length 25.0 ft. Slot Size 0.020 in. <br /> NOTES: <br /> Casing Dia 2-0 in. Length 35.0 ft. Type SCH 40 PVC <br /> Filter Pack Material 02/12 Lapis Lustre <br /> Drilling Company Sierra Pacific Expl. Drilling Method hbllaw Stem Auger <br /> Driller ,bhnny Arguello Log by Fred Hayden <br /> Geologist/Engineer Allen B. Storm License No F& 4.394 <br /> C + (n <br /> O O -4J C �y in <br /> C1 Wd , L C" Description <br /> �+ W— _ .. (Color, Texture, Structure) <br /> pa L, & .op, <br /> U ch m (/7 <br /> 0 I Three inches ASPHALT <br /> 0 0., o.. <br /> :•o•:•o•:o ine inches BASE course <br /> fight brown silty CLAY (medium stiff, dry, <br /> 2 no hydrocarbon odor) <br /> CL <br /> 4 Light brown clayey SILT (medium stiff, dry, <br /> no hydrocarbon Odor) <br /> 6 <br /> ML <br /> 8 Moderate yellowish brown silty CLAY with lighter brown <br /> inclusions (medium stiff , damp, no hydrocarbon odor) <br /> 10 MW3-10 <br /> 12 <br /> CL <br /> 14 <br /> MW3-15 <br /> 16 <br /> 18 Light olive brown clayey SILT with some sand (medium stiff, <br /> damp, no hydrocarbon odor) <br /> MW3-20 <br /> 20 <br /> 22 ML <br /> 24 <br /> MW3-25 <br /> 26 <br /> Page i of 3 <br /> a3/zs/is9� <br />