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, I Environmental Risk Sere Corporation <br /> Boring Log: MW-17D,P,S Date: 5/12/06 Logged by: Tyson Fulmer Well Specifications <br /> Location: Roberts No. 1, Roberts Island, Port of Stockton Elevation <br /> Drilling Co.: Resonant Sonic Inc GS: --- TOC: --- <br /> Driller: Jose Gutierrez Depth to Water <br /> Drilling Method: 8" hollow stem auger Static: D: 17.78 P: 19.72" S: 19.79' <br /> Grout Materials and Method: Bentonite and Tremie grouted bentonite neat cement slurry Total Well Depth: D: 20'; P: 255; S: 37' <br /> Well Sand Type: 2/12 Monterrey sand Lat.: -- Long.: --- <br /> Completion: Flush mounted in traffic rated Christy Box PVC Diameter: 2" SCH 40' <br /> Groundwater Sampling Method: No samples Screen Interval: D.15-20';P21.5-25.5,s 32-37' <br /> Soil Sampling Method: 2'split spoon (P= push) Screen Slot Size: 0.010" <br /> N <br /> a N N <br /> -r- m Well Well Well <br /> 2.9 > a o m `` Detail Detail Detail <br /> 0 0a X m3: Z) a Material Description VV-17D VV-17P VV-17S Remarks <br /> 2 <br /> 1 8 <br /> 5 <br /> 2 2 <br /> 20 5y 4/4 olive very fine grained sandy silt,loose poorly <br /> 3 22 ML sorted,dry,changes to 5y 4/4 olive when damp at 5'bgs, <br /> 4 5medium dense <br /> 3 <br /> 5 6 <br /> 6 8 <br /> 10 <br /> 7 10 SM 2.5y 5/4 light olive brown,loose silty sand,very fine to <br /> $ 10 fine grained,poorly sorted,moist at 7.5'bgs <br /> 12 <br /> 9— <br /> 14 <br /> 14 �. 7.5 3/2 dark brown-stiff clay,some organics,damp <br /> 10 16 <br /> 13 SP At 11 feet bgs 2.5y 4/3 olive brown medium stiff silty <br /> 11 14 clay,some sand,damp <br /> 12 14 <br /> 13 6 <br /> 8 <br /> 14 10 <br /> 11 Sc 2.5y 5/3 light olive brown medium stiff sandy clay <br /> 15- <br /> 7 <br /> 16 7 <br /> 8 <br /> 17 10 SM 2.5y 4/4 fine grained poorly sorted medium dense silty <br /> sand moist some clay <br /> 18 s 2.5y 5/3 light olive brown,loose,fine to medium <br /> 19 7 SP grained sand,wet,at 19 feet bgs color change to 1 <br /> 8 gley 4/1 dark greenish grey,loose poorly sorted sand <br /> 20- <br /> 4 <br /> 21 6 CL '/ 2.5y 2/5/1 black dense silty clay,trace organics,stiff, <br /> 6 medium plasticity <br /> KI <br /> 22 6 <br /> 23 7 <br /> 7 PT/ " 2.5y 2.5/1 black peat mixed with 1 gley 3/1 medium <br /> 24 7 CL ' plasticity stiff clay,organic rich <br /> 7 <br /> 25- <br /> 6 <br /> 26 7 <br /> 8 1 gley 3/1 medium dense silty clay <br /> 27 8 CL <br /> 28 4 <br /> 4 <br /> 29 4 1 gley 3/1 dark greenish grey medium dense clayey silt <br /> 4 ML <br /> 30 <br />