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s <br /> Wright Environmental Services, Inc., Tracy, CA Exploratory Boring Log <br /> • Project No 4090 Boring/Well No MW-5 Well Installed 2" dia Sch 40 PVC <br /> Client Mr Ed's Muffler Date Drilled July 21, 1997 Total Depth 20' Casing Depth 17' <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 2112 <br /> Permit SR#013082 (on Tracy High lot) Top Bentonite 5' Cement Grout Seal 5' to 0 5' <br /> Water Levels 1st Enc 10 5' 0 2 59 pm Surface vault box, Casing Elev 47 79 MSL <br /> Static 10 5' 0 3 30 pm <br /> Sample Blow a Depth Borehole <br /> No OV Count Cd (ft) LEthology Log Completion <br /> Gravel Fill <br /> JA <br /> CL - Silty CLAY with Sand, olive gray 5Y4/2, low plasticity, <br /> dissem sand 30%, silt 10%, massive, drills firm, damp '�Jh <br /> 5 <br /> MW-51 _ push Same as above, damp <br /> 10 SC/CL - Interbedded Clayey SAND and Sandy CLAY, brown, <br /> MW-5 - 1 1 1 7 5YR5/4, gray stains, very weak odor, v f sand 40-60%, <br /> clay 40160% and low plasticity, SC saturated, CL moist, med <br /> dense to stiff <br />• 15 Driller calls harder drilling at 15 feet <br /> MW-54 g 1 SW - SAND, varigated, fine to coarse grained, clay/silt<5% and <br /> coats grains, grains in contact, massive, loose, saturated, <br /> minor flowing at 16 feet <br /> j•j•j•j•j•j•r•r <br /> j.1.r.lrr.r.r.r <br /> j•r r 0-0-0-- <br /> MW-54 8 <br /> 0 <br /> r0-- <br /> 20 CL - Silty CLAY, yellowish brown 10YR5/6, low plasticity, <br /> dissem v f sand 10%, massive, firm, damp <br /> Bottom of Boring = 20 feet, <br /> borehole flows upon completion <br /> to 17 feet <br /> Reviewed by RG/CEG <br />