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' Wright Environmental Services, Inc., Tracy, CA Exploratory Boring Log <br /> Project No 41841 Boring/Well No MW-1 Well Installed 2" Sch 40 PVC <br /> Client Tracy Auto Stereo Date Drilled Sept 13, 2000 Total Depth 21 5' Casing Depth 20' <br /> Wocation Grantline at Holly, Tracy, CA Logger CMP Screen Length 12' Slot Size 0 020" <br /> rilling Method B° OD Hollowstem Auger Blank Length 8' Sand Pack 2/12 <br /> Permit: PHS EHD 0023638 Top Sand Pack 7' Top Bentonite 5' <br /> Water Levels 1st Enc 9'? Static 8 9' @ 1050 Cement Grout Seal 20' to 0 5' vault box <br /> Q) Casing Elev 27 41' MSL <br /> Sample Blow a Depth Borehole <br /> No OV Count cn (ft) Lithology Log Completion <br /> o Concrete Pavement <br /> a, CL - Silty CLAY, dark brown 10YR3/3, low plasticity, <br /> m v f sand 10%, stiff, damp "•` <br /> 5 Same as above, stiff, damp <br /> MW-1 > 0 41 <br /> 0fi 5 <br /> SP - SAND, gray, possible trench backfill, weak odor, very dense <br /> saturated <br /> Interbedded SP-ML - SAND and Clayey SILT, yellowish brown <br /> 10 10YR5/8, sand beds 0 5-2 0 inches thick with very little fines, <br /> Mw-i 2 0 42 silt beds 0 5-4 0 inches thick, stiff and damp sand beds <br /> ®tis saturated <br /> i <br /> 15 Same as above, sand saturated <br /> 165 0 35 Driller calls softer 15 to 17 feet <br /> SP - SAND, yellowish brown t0YR5/8, f med sand 95%, <br /> fines 5%, med dense saturated <br /> 20 <br /> MW- <br /> '$ 0 47 SC - Clayey SAND, yellowish brown 10YR5/8, 70-80% f sand, <br /> fines, clay varies 20%, faint bedding, no stain or odor, <br /> very moist, very dense <br /> Bottom of Boring = 21 5 feet, <br /> drilled 0 5' from Boring B-3 <br /> Reviewed by RG/CEG <br />