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Wright Environmental Services, Tracy, CA <br /> Project No 4889 Boring/Well No $-4 Exploratory Boring Log <br /> Cfient City of Tracy Date Drilled Feb 14, 2003 Well Installed No <br /> Location Waste Water Plant 3900 Holly, Tracy Logger CMP Total Depth <br /> Drilling Method 3" OD GeoProbe Cement Grout Seal 21 'to Surface <br /> Permit PHS EHD#32663 <br /> Water Levels 1st Enc 135' Static NM <br /> Sample Push °' Depth <br /> No PID 11 Lithology Log Borehole <br /> Completion <br /> GM- Silty GRAVEL_ FILL?, f ors sand with f gravel, pit backfill? A"AA <br /> � w w <br /> wwww <br /> AAAA <br /> 7 AwwA <br /> A A <br /> AAA <br /> w <br /> B-4.1 0 5 Amann <br /> Crs sand mixed, very dense, damp Increasing clay at 6 feet AAwA <br /> AAw <br /> A AA <br /> www <br /> AA A <br /> A w <br /> Driller calls change at 10 feet <br /> B-4-2 <br /> 1Z 0 10 CL- Sandy CLAY, grayish brown 10YR5l2, low plasticity, f sand 25%, AAw" <br /> massive, stiff, very moist Aw AA <br /> AAA <br /> 64-3 r <br /> AAA <br /> Aw <br /> nA <br /> AAw <br /> A w <br /> gol er 0 15 SC- Clayey SAND, brown 10YR4/3, low plasticity, clay 30%, AAwA <br /> f sand 70%, massive, dense, saturated, driller calls change at A w <br /> 16-17 feet AAAw <br /> www <br /> CH-Silty CLAY, brown 10YR513, mod to high plasticity, no sand, AAAA <br /> massive, very stiff, damp AAwA <br /> B-2-4 Sampler sleeve binds and rips no recovery, log of tip shoe and wAAw <br /> awz 0 20 sample remnants in sleeve A"A <br /> A w <br /> wAA <br /> Bottom of Boring = 21 feet <br /> EH- <br /> � f I <br /> Reviewed by RG/CEG <br /> x <br />