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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
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