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LL I Mnitoring Well M-2 <br /> Project Chevron/S. Center per Chevron U.S.A. , Inc. Drilling Log <br /> Location 139 S. Center, Stockton, CA Project 203 175 3291.01 <br /> Date Drilled 2115/91 Total Depth of Hole 60.0 ft. Di&Arzter S.25 in. See Site Abp <br /> Surface Elevation Water Level Initial 49.0 ft. 24-hour 44.87 ft. <br /> For Boring Location <br /> Screen: Dia 2.0 in. Length 25.0 ft. Slot Size 0.020 in. NOTES: <br /> Casing Dia 2.0 in. Length 35.0 ft. Type SCH 40 PVC <br /> Filter Pack Material 02112 Laois Lustre <br /> Drilling Company Sierra Pacific Exolor. Drilling Mathod Hollow Stem Auger <br /> Driller -Johnny Arguello Log by Fred Hayden <br /> Geologist/Engineer Allen S. Storm License No RG 4394 <br /> U) <br /> = Description <br /> Description <br /> C` ; C (Color, Texture, Structure) <br /> U N m fA <br /> 0 Three inches ASPHALT <br /> •;•o•:•o•:•o ine inches BASE Course with brick fragments <br /> ----Dark brown silty CLAY (firm, damp, no hydrocarbon odor) <br /> 2 <br /> 4 <br /> CL <br /> (FILL. some brick and rubble, wood fragments) <br /> 6 <br /> $ Moderate yellowish brown clayey SILT with fine sand (firm. <br /> damp, no hydrocarbon odor) <br /> 10 <br /> MW2-11 <br /> 12 <br /> 14 C C Brownish grey clayey SILT with fine sand (firm, damp, <br /> no hydrocarbon odor) <br /> MW2-15 <br /> 16 <br /> ML <br /> !8 <br /> Light brown clayey SILT (medium stiff, dry, <br /> no hydrocarbon odor) <br /> 24 MW2-20 <br /> 22 <br /> 24 Greyish brown clayey SILT (medium stiff, damp. <br /> no hydrocarbon odor) <br /> 26 <br /> Page i of 3 <br /> o3/z6il99t <br />