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l 1 <br /> Wright Environmental Services, Inc., Tracy, CA Exploratory Boring Log <br /> Project No 4184 1 Boring/Well No MW-1 Well Installed 2" Sch 40 PVC <br /> Wlient Tracy Auto Stereo Date Drilled Sept 13, 2000 Total Depth 21 5' Casing Depth 20' <br /> ocation Grantlme at Holly, Tracy, CA Logger CMP Screen Length 12' Slot Size 0 020" <br /> Drilling Method 8" OD Hollowstem Auger Blank Length 8' Sand Pack 2112 <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 /> m Casing Elev 27 41' MSL <br /> Sample Blow a Depth Borehole <br /> No OV Count � (ft) Llthology Log Completion <br /> Concrete Pavement <br /> a1 CL - Silty CLAY, dark brown 10YR3/3, low plasticity, .A.^ <br /> v f sand 10%, stiff, damp <br /> •A +A <br /> 5 Same as above, stiff, damp <br /> Mw-1-1 0 41 <br /> 065 SP - SAND, gray, possible trench backfill, weak odor, very dense <br /> saturated <br /> Interbedded SP-ML - SAND and Clayey SILT, yellowish brown IT <br /> 10 10YR5/8, sand beds 0 5-2 0 inches thick with very little fines, <br /> Mw 1-2 0 42 1silt beds 0 5-4 0 inches thick, stiff and damp sand beds <br /> 0115 Saturated <br /> 1 $ Same as above, sand saturated <br /> W 1-3sij <br /> 0165 0 35 Driller calls softer 15 to 17 feet <br /> SP - SAND, yellowish brown 10YR5/8, f med sand 95%, <br /> fines 5%, med dense saturated <br /> 20 <br /> MW-®21154 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 />