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Wright Environmental Services, Inc., CA Exploratory Boring Log <br /> Project No.4509 BORING NO.MWA 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:25.5' <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:13-14'@0850 Static:no measurement Top Sand Pack:8.5' Top Bentonite:6.5' <br /> Grout Seal:6.5'to surface Vault Box <br /> n <br /> Sample PID Blow E Well Detail/ <br /> No. /OV Count iA Depth Llthology Log Backfill <br /> dAsohalt <br /> A A <br /> n A <br /> 3' SW-SAND Fill,damp AAA <br /> :o i <br /> V <br /> c <br /> t ML-Sandy SILT,yellowish brown 10YR516,slight plasticity,v.f.sand 20%, <br /> -5- crude bedding,firm,damp. <br /> MW-10 7 <br /> @ 5' <br /> MW-1 10 <br /> 0 70 ML-Sandy SILT,brown 10YR5/3,veru slightly plastic,f.-med.sand 35-40%, <br /> rare crs.sand,massive,stiff,damp. <br /> P <br /> MW-1 15- <br /> 0 23 <br /> @ 16.5' SW-SAND,gray 10YR5/1,f.-crs.sand 95%,fines 5%,massive,dense, <br /> saturated;rare fine gravel. <br /> MW-1 20 <br /> @ 21.5 0 35 Borehole flows 6 feet,fine to crs Sand and fine Gravel,dense,saturated. <br /> Driller calls change at 22 feet. <br /> SM-Silty SAND,yellow brown 10YR5/6,nonplastic fines vary 5-20%,f.sand <br /> MW-1 25 80-95%,masive,loose,saturated;slight flowing. <br /> @265' 0 7 <br /> Bottom of <br /> clay plu stab n i <br /> e <br /> Reviewed by PG <br />