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Wright Environmental Services, Inc., Tracy, CA Exploratory Boring Log <br /> Project No 4090 Boring/Well No PB-21 Well Installed No <br /> dent <br /> Cox and Cox Date Drilled Apr 20, 2001 Total Depth 26' <br /> cation 595 E 11th, Tracy, CA Logger CMP Cement Grout Seal 26' to surface <br /> Drilling Method 3" OD GeoProbe seal set by tremae line filled from <br /> Permit: PHS EHD 0025693 bottom to top of borehole <br /> Water Levels 1st Enc 10 5-11' 0 12 45 Static NM <br /> Sample Cont o. Depth Borehole <br /> No PID Push (ft) Ltthology Lag Completion <br /> Road Base •"• <br /> 0 SC - Clayey SAND, brown, low plasticity, f sand 70%, <br /> massive, med dense, damp <br /> c <br /> = 5 <br /> PS Z' 0 R Same as above, less clay, massive, med dense, damp , <br /> 10 <br /> Pa-21 0 SP - SAND, brown, f med sand 90%, fines 10% nonplastic, <br /> crudely bedded, contains SC interbeds at 11-11 5 feet, <br /> med dense, saturated, no stain or odor <br /> 15 Driller calls very hard drilling-gravel <br /> PB 21 0 SW - SAND, brown, f crs sand 95%, clean, crs sand beds to <br /> a 0 5 inch thick, o/w massive to faintly bedded, dense, saturated <br /> 20 <br /> 21 <br /> 4 0 SP - SAND, gray brown no stain or odor, f sand 95°'0, fines <br /> y nonplastic, local crs sand beds, dense, saturated <br /> Same as above, sharp contact to underlying <br /> 24 0 25 Ci_ - Sandy CLAY, yellow brown, low plasticity, f sand 30%, <br /> fines 20%, massive, inc clay at 26 feet, stiff, damp <br /> Bottom of Boring = 26 feet <br /> Reconnaissance groundwater sample <br /> interval 26 to 22 feet <br /> Reviewed by RG/CEG <br />