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,Wright Environmental *vices, Inc., CA Exploratory Boring Log <br /> Project No.4509 BORING NO. MW-2 Drilling Method: 8"Hollowstem Page 1 of 1 <br /> Logged by: CMP Date: Dec. 11,2008 BOREHOLE COMPLETION: <br /> Client:City of Tracy Well Installed:2"dia. Sch.40 PVC <br /> Location: 99 W.6th Street Total Depth: 26.5' Casing Depth:25' <br /> Tracy, CA Screen Length: 15' Slot Size: 0.020 <br /> Permit:SJC EHD 55561 Blank Length: 10' Sand Pack:#3 <br /> Water Levels: 1st Enc: 15-16'@ 11:20 Static: no measurement Top Sand Pack: 8' Top Bentonite:6' <br /> 0 Grout Seal:6.5'to surface Vault Box <br /> Sample PIDBlow a' <br /> No. /OV Count �Depth Well Detail/ <br /> Lithology Log Backfill <br /> s hal <br /> —77 <br /> �+ ML-Sandy SILT,yellowish brown 10YR4/4, slight plasticity, f.-med. sand 35%, <br /> massive,firm, damp. <br /> v <br /> c <br /> t <br /> MW-2 5 <br /> 0 6 <br /> @ 5' ML-Clayey SILT, daruk yellowish brown 10YR4/6, slight to low plasticity, <br /> vf. sand 20%,very faint bedding, rare ors sand, firm, damp. <br /> MW-2 10 <br /> @ 11.50 11 Same as above, les sand, iron oxide mottles throughout, stiff, damp. <br /> SW-SAND,stained gray, f.-crs.sand 90%,fines 10%, slight odor, massive, <br /> MW-3 15 med. dense, damp to nearly saturated. <br /> @ 16.5' 40 22 472 <br /> MW-4 46 5 20 <br /> @ 21.5' SP-SAND,yellowish brown 10YR5/4, nonplastic fines 5-10 <br /> %,f.sand up to 95%,slight odor,contains 2-inch thick sandy silt interbeds, <br /> loose, saturated. <br /> MW-5 425@ 26.5' 77SM-ML-Silty SAND to Sandy SILT,yellowish brown 10YR5/4, nonplastic fines <br /> vary 20-40%,f. sand varies 60-80%, massive, loose,very moist. <br /> Bottom of Boring=26.6 feet <br /> clay plug swabbed into sampler hole. <br /> Reviewed by PG <br />