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Environmental` Services,Corporation Boring Log: MW-18D/P/S <br /> r1600 Riviera A\,, a,Suite 310 Page 1 of 2 <br /> Walnut Creek,CA 94596 <br /> s925 938.1600 <br /> Date: 8/30/2006 Logged By: Monami Datta Well Specifications <br /> Location:Roberts Number 1,Roberts Island,Stockton,CA Elevation <br /> Client:Port of Stockton GSE:4.21,4.08,4.09 TOC:3.88,3.83,3.88 <br /> ...................................................................................................................................... .................................................... <br /> Drilling Co.: Gregg Drilling.................................................................................................... Depth to Water <br /> Drilling Method:8"Hollow Stem Auger Driller:Bobby Initial:15 ft. Static:8 ft: <br /> ................................................. ............................................... .................. <br /> Well Sand Filter:2/12 Monterey Well Seal:Bentonite Total Well Depth:45 ft. <br /> ...................................................................................................................................... .................................................... <br /> Grout Materials and Method:Neat Cement Lat.:37 58.945 Long:-121 23.501 <br /> ...................................................................................................................................... .................................................... <br /> Completion:Flush mounted Christy Box PVC Diameter:2"PVC <br /> ...................................................................................................................................... .................................................... <br /> Groundwater Sampling Method:NA Screen Interval:8-12.85,17-21.81,39-45 ft. <br /> ...................................................................................................................................... .................................................... <br /> Soil Sampling Method:CA Modified SPT 24" Screen Slot Size:0.010" <br /> a� <br /> CA a a N �° <br /> SO WE <br /> m <br /> `� ' o Material Description Well Diagram <br /> � a <br /> Q 30 N <br /> m � O U) in D U MW-18d MW-18 MW-18s <br /> Silty sand(SW l OYR 6/2,pale yellowish brown,medium to fine grain, Hand auger <br /> non-plastic fines(silt),dry first 5' <br /> 5— <br /> SM <br /> As above,trace medium sized gravel present <br /> Q <br /> 10— Clayey sand(SC)10YR 5/4,pale yellowish brown,changes to dark <br /> yellowish brown,reddish coloration observed in places due to reducing <br /> environment <br /> SC <br /> 5 1 ' Organic clay(PT) N1,black,presence of roots in places <br /> PT <br /> 20 Clay(CL)5Y 3/2,olive gray,low plasticity,stiff,damp <br /> Color change to greenish gray,5 gley 4/2,soft,medium plasticity,wet <br /> 25 CL <br /> Color change to dark yellowish brown,stiff,damp,low plasticity <br />