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Wright Environmental Services, Inc., Tracy, CA Exploratory Boring Log <br /> Project No 4090 Boring/Weil No MW-4 Well Installed 2" dia Sch 40 PVC <br /> acleent Mr Ed's Muffler Date Drilled July 21, 1997 Total Depth 20' Casing Depth 17 5' <br /> ocation 595 E 11th St , Tracy,CA Logger CMP Screen Length and Size 10' of 0 020" <br /> Drilling Method 8" OD Hollowstem Top of Sand Pack 6' Sand Size 2112 <br /> Permit: SR#013082 (on Tracy High School) Top Bentonite 4' Cement Grout Seal 4' to 0 5' <br /> Water Levels 1st Enc 11' ® 1203 pm Surface vault box, Casing Elev 47 60 MSL <br /> Static 10 26' @ 12 30 pm <br /> Sample Blow a. Depth Borehole <br /> No OV Count m (ft) Lithology Log Completion <br /> Asphalt Pavement <br /> CL - Silty CLAY, dark yellowish brown 10YR414, low plasticity, -;- <br /> sand to 20% dissem , drills firm, damp "•" <br /> 5 <br /> Mw-4-1 _ push Same as above, firm, damp <br /> Drills easy <br /> 10 <br /> Mw-4 - 22 SCICL - Interbedded Clayey SAND and Silty CLAY, yellowish <br /> brown 10YR4/4, low plasticity, sand to 60% <br /> in sandy beds and saturated, clay beds moist, med dense to stiff, <br /> very weak odor <br /> 15 <br /> Mw-4- - 2 ML-SM - Sandy SILT, to Silty SAND, brown, 10YR4/3, <br /> nonplastic, sand to 70%, silt varies 30-70%, massive, soft to <br /> very loose, saturated, increasing sand with depth <br /> Mw 4 - 16 <br /> 2CL - Silty CLAY, brown 10YR 4/3, tow plasticity, v f sand 400 <br /> 04massive, very stiff, damp to moist <br /> Bottom of Boring = 20 feet <br /> Reviewed by RG/CEG <br />