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Environmental Risk Serv' Corporation <br /> Boring Log: MW-16D,P,S Date: 5/11/06 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: 16.27 P: 16.52'; S: 19.33' <br /> Grout Materials and Method: Bentonite and Tremie grouted bentonite neat cement slurry Total Well Depth: D: 22.5'; P: 33'; S:64' <br /> Well Sand Type: 2/12 Monterrey sand Lat..- --- I Long.: --- <br /> Completion: Flush mounted in traffic rated Christy Box PVC Diameter: 2"SCH 40' <br /> Groundwater Sampling Method: No samples Screen Interval:D:17-22.5'; P:28-33';5:59-64' <br /> Soil Sampling Method: 2'split spoon (P= push) Screen Slot Size: 0.010" <br /> N <br /> a 4) u <br /> w m > t a, Well Well Well <br /> a-� j a u 3 N V Q. Detail Detail Detail <br /> 0 0 3 rr m D t9 Material Description W-16D W-16P W-16S Remarks <br /> 8 <br /> 1 7 2.5y 6/3 light yellowish brown poorly grade sand,fine <br /> 7 SP ' grained,<5%fines,dry <br /> 2 7 <br /> 3 7 <br /> 7 SM/ _ . 2.5y 5/4 light olive brown silty sand,50%silt,50% <br /> 4 7 ML sand,dry to damp, silt lens from 4.5 to 5 <br /> 5- <br /> 10 <br /> 19 2.5y 5/6 light olive brown,medium grained,loose,clean <br /> 6- <br /> 19 sand,poorly sorted,<5%fines <br /> 7 20 <br /> 8 8 <br /> 8 <br /> g 8 SP <br /> 8 <br /> 10- <br /> 10 <br /> 11 10 <br /> 10 <br /> 12 10 <br /> 13 11 <br /> 11 <br /> 14 11 2.5y 5/3 Light olive brown very fine to fine grained silty <br /> 11 SM sand,50%fines,poorly sorted,damp to wet <br /> 15- <br /> 8 <br /> 16 8 <br /> $ 2.5y 4/4 Olive brown,medium to coarse grained poorly <br /> 17 8 sorted clean sand,gets finer in grain between 17.5 and <br /> 18 9 19 feet bgs,moist to wet <br /> 10 <br /> 19 10 SP <br /> 11 1 gley 4/1 stiff clay lens with medium plasticity <br /> 20- <br /> 8 <br /> 5y 4/3 Olive,fine grained,poorly sorted sand,color <br /> 21 9 change observed at 21 feet bgs to 5y 4/2 olive grey, <br /> 22- 10 wet <br /> 23 6 1 Gley 3/1 Dark greenish grey clay,stiff,high plasticity, <br /> 7 CL trace organics <br /> 24 8 <br /> 8 <br /> 25- <br /> 7 <br /> 26 9 <br /> 11 <br /> 27 11 <br /> PT 2.5y 2.5/1 black low plasticity,peat,soft,20%clay,wet <br /> 28 6 <br /> 7 <br /> 29 8 <br /> 8 <br /> 30 <br />