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L <br /> Wright Environmental Services, Inc., Tracy, CA Exploratory Boring Log <br /> Project No 4090 Boring/Well No MW-4 Well Installed 2" d1a Sch 40 PVC <br /> . Client Mr Ed's Muffler Date Drilled July 21, 1997 Total Depth 20' Casing Depth 175' <br /> Location 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 2/12 <br /> Permit SR#013082 (on Tracy High School) Top Bentonite 4' Cement Grout Seal 4' to 0 5' <br /> Water Levels 1st Enc 11' @ 12 03 pm Surface vault box, Casing Elev 47 60 MSL <br /> Static 10 26' 0 12 30 pm <br /> Sample Blow a Depth Borehole <br /> No OV Count (a (ft) Lithology Log Completion <br /> Asphalt Pavement <br /> CL - Silty CLAY, dark yellowish brown 10YR4/4, 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 4-2 - 22E- SC/CL - 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 _ 2E-- ML-SM - Sandy SILT, to Silty SAND, brown, 10YR413, <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 /> 20 CL - Silty CLAY, brown 10YR 413, low plasticity, v f sand 40% <br /> massive, very stiff, damp to moist <br /> Bottom of Boring = 20 feet <br /> Reviewed by RG/CEG <br />