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Environmental Risk Servi Corporation <br /> Boring Log: MW-10P, S Date: 9/15/05 Logged by: Tyson Fulmer Well Specifications <br /> Location: Roberts No. 1, Roberts Island, Port of Stockton Elevation (feet msl; p,$) <br /> Drilling Co.: Major Drilling GS: -11.13, -11.17 TOC: -11.12, -11.35 <br /> Driller: Frank Bartolovich Depth to Water <br /> Drilling Method: 8" hollow stem auger Static: P:4.9'; S: 6.69' <br /> Grout Materials and Method: Bentonite and Tremie grouted bentonite neat cement slurry Total Well Depth: P: 5'; S: 15' <br /> Well Sand Type: 2/12 Monterrey sand P: Lat.: 37.981854 Long.:-121.403848 <br /> Completion: Finished flush in traffic rated Christy box S: Lat.: 37.981850 Long.:-121.403912 <br /> Groundwater Sampling Method: No samples Screen Interval:P: 2-5'; S: 10- 15' <br /> Soil Sampling Method: 2'split spoon (P=push) PVC: SCH 40,2"D, 0.010"slot <br /> N Of <br /> a r c Well Well <br /> m > `° N r rn Detail Detail <br /> yv >Ea o U) 2 MW- MW- <br /> o n X m D a Material Description 10P 10S Remarks <br /> Peat, dry for first 2-3.5 feet,damp to moist to wet by 5 <br /> 1 <br /> 2 PT <br /> 3- <br /> 4- <br /> 5- <br /> 2 45 2 <br /> 2 Gray, high plasticity clay at around 5 feet bgs, mixed <br /> 6- <br /> 2 , with some organics, mottled, high plasticity <br /> 7 3 <br /> CL j <br /> 8 <br /> Water shoots up to 8.5' <br /> 9 bgs <br /> 10- <br /> 4 <br /> 6 { Fine grained cohesive silty sand, grades from gray to a <br /> 11 9 i light brown(2.5 YR-5/4), damp to dry <br /> 12 t1 <br /> SM <br /> 13- <br /> 14- <br /> 15- <br /> 314 15 8 <br /> $ Total depth Water in hole at 15'bgs <br /> 16 11 rises to 14' <br /> 17 13 <br /> 18- <br /> 19- <br /> 20- <br /> 21- <br /> 22- <br /> 23- <br /> 24- <br /> 25- <br /> 26- <br /> 27- <br /> 28- <br /> 29- <br /> 30--- <br />