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Wright Environmental Services, Inc. Tracy, CA Exploratory Boring Log <br /> Project No.4529 BORING NO.MWA Drilling Method:If"Hollowstem Page 1 of 1 <br /> Logged by: CMP Date:Feb 3,2009 BOREHOLE COMPLETION: <br /> Client City of Tracy Well Installed:2`dia_Sch.40 PVC <br /> Location:Boyd Service Center Total Depth:28.5' Casing Depth:25' <br /> 560 N.Tracy Blvd.,Tracy Screen Length: 16' Slot Size:0.020 <br /> Permit SJC EHD 55563 Blank Length: 10' Sand Pack:#3 <br /> Water Levels:1st Enc:14'?@ 09:35 Static:15'?rising @ 10:45 Top Sand Pack;8' Top Benlonite:6' <br /> Grout Seat:V to Surface Vault Box <br /> a <br /> Sample PII] Blow E Wall Detail/ <br /> No. fOV Count m Depth Llthology Log Backfill <br /> Asphalt Pavement <br /> rn ML-Sandy Clayey SILT,stained gray,may contain 611(?),nonplastic to slightly ^� <br /> co plastic fines,vL sand<10%firm,damp. " <br /> MWA-1 5 ML-Sandy SILT,stained gray,slightly plastic fines 80%,v f_sand 20%,firm, ^"^ <br /> @ 5' 121 push damp. <br /> MW-1-2 10 <br /> @ 10' 82 5 <br /> CL-Sandy CLAY,stained gray,slight[plasticity,0.sand 30%,massive,soft to firm, <br /> damp. <br /> MW-1-3 15 <br /> @ 15' 45 2 Lost sample,sampler tip cuttings shows SC-Clayey SAND,stained gray,fines slighlty <br /> plastic,f.sand appears saturated,loose. <br /> Drill cuttings appear as SP-SAND from 15 to 20 feet;sheen on water. <br /> MW-1-4 20- <br /> Q 20' 26.7 4 <br /> Sandy CLAY,stained gray,low plasticity fines,vf_sand 35%,masslve, <br /> possible product in rootholos,loose,very melst. <br /> MW-1-5 25 SM-Silty SAND,brownish yellow,10YR616,nooplas lie fines nd 85%, <br /> @ 25' 5 5 massive,loose,saturated;contains thin silty Interbeds Iha a a[urated. <br /> FBI. BQttomtpf B g 6 fe <br /> driller swabs lay V <br /> 1 0 Ole. <br /> IN <br /> Reviewed by PG <br />