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F <br /> Wright Environmental Seises, Inc. Tracy, CA Exvioratory Boring Log <br /> Project No.4529 BORING NO. MW-2 Drilling Method. 8"Hollowstem Page 1 of 1 <br /> Logged by: CMP Date: Feb 2,2009 BOREHOLE COMPLETION: <br /> Client:City of Tracy Well Installed:2"dia. Sch.40 PVC <br /> Location: Boyd Service Center Total Depth:26.5' Casing Depth:25' <br /> 560 N.Tracy Blvd.,Tracy Screen Length: 15' Slot Size:0.020 <br /> Permit:SJC EHD 55563 Blank Length: 10' Sand Pack:#3 <br /> Water Levels: 1st Enc: 14?@ 12:15 Static: 14.5 @ 13:25 Top Sand Pack:8' Top Bentonite:6' <br /> Q Grout Seal:6'to Surface Vault Box <br /> CL <br /> Sample PID Blow E Well Detail/ <br /> No. IOV Count u) Depth Lithology Log Backfill <br /> Asohalt Pavementh <br /> L <br /> ML-Sandy SILT, brown IOYR5/3, nonplastic,v.f.sand 30%, massive,soft to <br /> firm,damp. <br /> c <br /> e� <br /> MW-2-1 5- <br /> @ 5 0 4 Same as above,v.f. sand 40%,soft to firm,damp. <br /> @ 10'2 0.3 4 10 SM-ML-Silty SAND to Sandy SILT,brown 10YR513, low plasticity silt varies 50-80%, <br /> v.f. sand varies 20-50%, massive,soft to loose,damp to moist,stained?at <br /> 10.5-11.5 feet. <br /> 0 Sheen on rods at 14.5 feet. <br /> MW-2-3 15 <br /> @ 15' 22 3 <br /> SM-ML-Silty SAND to Sandy SILT,stained gray,odor,slight to low plasticity fines, <br /> v.f.sand 50-90%,crudely bedded,soft to loose,saturated;sheen on water. <br /> MW-2-4 20 Same as above, interbedded SM-ML saturated overall, no stain below 21 feet, <br /> @ 20' 0.7 2 massive loose to soft. <br /> SM-Silty SAND,yellow brown 10YR5/4,slight plasticity fines/silt 20-40%,vf.to f. <br /> sand 60-80%, locally interbedded, loose saturated,thin silt beds moist to very <br /> moist. <br /> MW-2-5 25 <br /> @ 25' 0.1 4 <br /> ML-Sandy SILT,yellowish brown 10YR514,slight to low plasticity fines,v.f.sand <br /> Varies 10-30%, massive,soft,damp to moist. <br /> Bottom of Boring=26.5 feet <br /> driller swabs clay plug into SPT sampler hole. <br /> Reviewed by PG <br />