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Wright Environmental Services, Inc., Tracy, CA Exploratory Boring Log <br /> Project No 4070 Boring/Well No MW-4 Well Installed 2" dia Sch 40 PVC <br /> .Client M&M Auto Date Drilled July 29, 1997 Total Depth 20' Casing Depth 20' <br /> Location 60 E 10th St , Tracy, CA Logger CMP Screen Length and Size 15' of 0 020' <br /> Drilling Method 8" OD Hollowstem Top of Sand Pack 4' Sand Size 2/12 <br /> Permit SJC-PHSEHD#013175 Top Bentonite 3' Cement Grout Seal 3' to 0 5' <br /> Water Levels 1st Enc 12't @8 56 am Surface vault box, Casing Elev 49 86' MSL <br /> Static 12' 09 30 am <br /> Sample Blow a Depth Borehole <br /> No OV Count ca (ft) Lithology Log Completion <br /> Concrete Pavement <br /> CL - Sandy CLAY, dark brown 10YR4/3, low plasticity, very <br /> fine sand 10% dissem , massive, drills firm, damp •"•" •"•"- <br /> Mw4-1 _ push a <br /> 50ppsi Same as above, damp <br /> Drills harder at 8-9 feet <br /> 10 CL - Silty CLAY, dark yellowish brown 10YR4/4, low-medium <br /> 500psi <br /> Mwa 2 push plasticity, very fine sand 10% dissem , drills soft-firm, moist <br /> - <br /> Lost sample at 10 feet, logged off shoe <br /> SP - SAND, varigated, fine sand to over 90%, fines<10%, <br /> 5 massive, mod dense, saturated, lost sample, logged cuttings <br /> Mwa 3 push 0 off shoe <br /> - 500psi <br /> push <br /> Mwa a - soapsi Redrive at 17 feet, recover 100%, same as above, saturated <br /> Mwa-s _ push <br /> coops, <br /> 11- 20 <br /> CL - Sandy CLAY, dark yellowish brown 10YR4/4, low plasticity, <br /> faintly bedded, locally laminated, fine sand 20% dissem , <br /> firm stiff, damp to moist <br /> Bottom of Boring = 20 feet <br /> L-t— <br /> Reviewed by RG/CEG <br />