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Wright Environmental Services, Inc., CA Exploratory Boring Log <br /> Project No.4889 BORING NO:B-5(north of B-1) Drilling Method: GeoProbe 6600 Page 1 of 1 <br /> Logged by:CMP Date:October 28,2008 BOREHOLE COMPLETION: <br /> Client: City of Tracy Well Installed: No. <br /> Location:Wastewater Plant Total Depth:25' <br /> 3900 Holly Dr.,Tracy, CA <br /> Permit: SJC EHD SR 55560 Cement Grout Seal: 25'to surface <br /> Water Levels: 1st Enc: 12'@ 14:10 Static: 10'@ 14:40 <br /> Q <br /> Sample PID Cont. E <br /> No. Push m Depth Well Detail/ <br /> Lithology Log Backfill <br /> Gravel Fill, dense,damp. <br /> B-5 <br /> @ 5' CL-Sandy CLAY, 10YR5/3 brown, low plasticity, f. sand 25% massive, oxidized <br /> 0 5 plant fragments, rare gravel,stiff, damp. <br /> , <br /> Same as above, stiff, damp. <br /> B-5 <br /> @ 10' 0 <br /> 10 <br /> B-5 SC-Clayey SAND, brown 10YR5/3,fines silt/clay low plasticity 20%,thin clayey <br /> @ 15' '; interbeds,f.to med. sand 80%, dense, saturated. <br /> 0 15 <br /> Same as above,crs.sand interbed 18-18.5 feet, dense, saturated.. <br /> B-5 <br /> @ 20 0 ``' 20 4-inch thick sndy clay bed at 20 feet, o/w same as above. <br /> i <br /> B-5 , Lost sample 20-25 feet, SP sand in bit, saturated. <br /> @ 25' 0 % <br /> 25 - <br /> Bottom of Boring=25 feet <br /> Temporarily case borehole for water sample <br /> PID-reconnaissance vapor in ppm. <br /> Reviewed by PG <br />