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,AWWI Environmental Risk Servi Corporation <br /> Boring Log: MW-9P, $ 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: -8.42,-8.33 TOC: -8.89, -8.59 <br /> Driller: Frank Bartolovich Depth to Water <br /> Drilling Method: 8" hollow stem auger Static: P: 3.95'; S:4.25' <br /> Grout Materials and Method: Bentonite and Tremie grouted bentonite neat cement slurry Total Well Depth: P: 12.45'; S: 23' <br /> Well Sand Type: 2/12 Monterrey sand P: Lat.: 37.986593 Long.: -121.399894 <br /> Completion: Finished flush in traffic rated Christy box $: Lat.: 37.986563 Long.:-121.399895 <br /> Groundwater Sampling Method: No samples Screen Interval: P: 7- 12'; S: 15-20' <br /> Soil Sampling Method: 2'split spoon (P=push) PVC: SCH 40, 2"D, 0.010"slot <br /> y � <br /> 0f C <br /> CL Well Well <br /> ��- >n o C/5 m-J Detail Detail <br /> o 08 x m 5 0 Material Description MW-9P MW-9S Remarks <br /> Dark brownish black peat layer, dry light color on top gets Adjacent geology <br /> 1 wetter with depth interpreted based on <br /> 2 Fill boring log E1 <br /> /PT <br /> 3 <br /> No recovery,very soft <br /> q and easy to push <br /> Soft, moist peat layer <br /> 5 <br /> PT <br /> 6 <br /> 7 <br /> Soft, rich in organics, peat layer, moist to wet, black(5 Y- Set 5'of PVC screen and <br /> 8 2.5/1) left overnight to sample <br /> PT peat layer <br /> 9- <br /> 10— PT/ <br /> 11 CL Peat/clay mixture, high plasticity <br /> Driller feels soft layer, <br /> 12 not as soft as peat,feels <br /> CL <' transition to harder unit <br /> 13 at 14 feet bgs <br /> 14 <br /> Fine grained silty sand layer, damp Pulled back to 14' bgs to <br /> 15 SM sample <br /> 16 <br /> Water rushes is after 16 feet at fast rate. High <br /> 17— permeability zone of SM or SP is assumed. <br /> 18 <br /> 19 <br /> SM/ <br /> 20— SP <br /> � •f <br /> 21 <br /> 22 <br /> 23 <br /> Total depth <br /> 24 <br /> 25 <br /> 26 <br /> 27 <br /> 28 <br /> 29 <br /> 30 <br />