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MIN <br /> Monitoring Well MW-2 <br /> Project Chevron/S. Center Ower _Chevron U.S.A. . Inc. Drilling Log <br /> Location 139 S. Center, Stockton. CA project Number 203 175 3291.01 <br /> U) <br /> Description <br /> aV4U no <br /> 8t; z _ 0-J (Color. Texture. Structure) <br /> U m U9 <br /> 26 Greyish brown clayey SILT (continued from page 1) <br /> 28 ML <br /> Tan mottled brown silty CLAY (medium stiff. <br /> no hydrocarbon odor) <br /> 30 MW2-30 <br /> CL <br /> 34 Olive grey clayey silt with SAND (loose, damp, <br /> no hydrocarbon odor) <br /> MW2-35 <br /> 36 <br /> ML <br /> j 4 MW2-40 Greyish green clayey sandy SILT (medium stiff, damp, <br /> trace hydrocarbon odor) <br /> 42 <br /> 44 Greyish green silty CLAY (medium stiff, moist, <br /> slight hydrocarbon odor) <br /> MW2-45 <br /> 4 <br /> CL <br /> 48 <br /> Encountered water 2/14/91 (1550 hoursl. <br /> ---Greyish olive clayey silty SAND (loose, wet, <br /> 5 MW2-50 slight hydrocarbon odor) <br /> (grades to medium stiff, no hydrocarbon odor) <br /> 52 SM <br /> 54 Light olive grey clayey SILT (stiff, wet, <br /> slight hydrocarbon odor) <br /> MW2-55 <br /> 5658 ML <br /> (sloughing sand) <br /> 03126/1991 Page 2 of 3 <br />