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Wright Environmental services, Inc., Tracy, CA Exploratory Boring Log <br /> Project No 4090 Boring/Well No MW-7 Well Installed 2" dia Sch 40 PVC <br /> Bent Mr Ed's Muffler Date Drilled July 22, 1997 Total Depth 20' Casing Depth 16 5' <br /> cation 595 E 11th St , Tracy,CA Logger CMP Screen Length and Size 10' of 0 020" <br /> ri11ing Method 8" OD Hollowstem Top of Sand Pack 5' Sand Size 2112 <br /> Permit: SR#013082 Top Bentonite 5' Cement Grout Seal 5' to 0 5' <br /> Water Levels 1st Enc 11 5 feet ® 11 03 am Surface vault box, Casing Elev 48 78 MSL <br /> Static not measured <br /> Sample Blow Depth Borehole <br /> No OV Count CO (ft) L�thology Log Completion <br /> Asphalt Pavement <br /> •A <br /> CL - Silty CLAY, very dark grayish brown 10YR 312, low <br /> plasticity, v f sand 10-20% dissem , drills firm, damp •A•"• <br /> .A <br /> 5 <br /> 'nw 71 _ push Same as above, color change to grayish brown 10YR6/2, firm, <br /> damp <br /> 10 <br /> ""w'7 2 - 3 SC/CL - Interbedded Clayey SAND and Sandy CLAY, yellowish <br /> brown 10YR5/6, SC-sand 85%, clay 15%, massive, loose, <br /> saturated, CL-low plasticity, f sand 20%, faintly bedded, soft, <br /> damp to moist, becomes sandier 14-15 feet <br /> 15 <br /> tnw 7 _ 3 <br /> CL - Sandy CLAY, yellowish brown 10YR5/4, low to medium <br /> plasticity, faintly bedded, dfssem v f sand 20%, soft, damp <br /> to moist <br /> Bottom of Boring = 16 5 feet <br /> Reviewed by RG/CEG <br />