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Wright Environmental Services, Inc., Tracy, CA <br /> ' Exploratory Boring Log <br /> PrOjett No 4529 BonnglWell No B-3 Well Installed No <br /> Client City of Tracy Date Onlled Feb 10, 2003 Total Depth 24' <br /> Location 560 Tracy Blvd , Tracy, CA Logger CMP <br /> Dnlhng Method 3"OD GeoProbe Cement Grout Seal 24 ' to surface <br /> Permit PHS EHD 32664 <br /> Water Levels 1 st Enc 13'± Static 13 8 @ 11 25 <br /> Sample Cont 2 Depth <br /> No PID Core Lithology Log Borehole <br /> Completion <br /> pp.' (ppm) Concrete pavement A A <br /> V1if AAA" <br /> too' 0 1 ML- CLaye y SILT, 2 5Y3/2, very dark grayish brown, low plasticity, <br /> f sand <5%, faint bedding, firm, damp ^^^ <br /> AAA <br /> Same as above, appears increase in silt, less sand, moist, firm AAAA <br /> 5 AAA" <br /> sa-2 1 2 <br /> m e' AAA <br /> ^^^ <br /> A <br /> Possible discolonzation(?) and increasing clay at 11 5 feet AA"� <br /> s3-3 1 3 10 <br /> to 12' AAAA <br /> A <br /> AAAA <br /> CL- Silty CLAY, brown 10YR5/3, low plasticity, massive, contains very <br /> thin sandy beds, stiff, damp ^;^ <br /> A" <br /> 8.3-4 2 A A A <br /> to <br /> is' 4 <br /> ^^A <br /> 15 AA <br /> AAA <br /> SC- Clayey SAND, stained gray, fines 10% and slighity plastic, AA^^ <br /> dense, saturated <br /> A <br /> o' 3 5 <br /> AAA <br /> Same as above, stained gray, less stain by 19 feet, color change to AA"^ <br /> 20 yellowish brown <br /> AAA <br /> s-U 0 g CL- Silty CLAY, brown 10YR5/4, low-mod plasticity, stiff, damp, <br /> to 24' contains sandy strata 2-4 inches at 23 feet that are saturated, then "AAA <br /> becomes clayey at 24 feet, damp A ^ <br /> AAA <br /> AA A <br /> JL A <br /> 25 <br /> Bottom of Boring = 24 feet, <br /> continuously cored, thin separate <br /> phase product on water and <br /> coats rods, floating product at 13 8 feet <br /> Reviewed by RG/CEG <br /> r <br />