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Environmental Risk Servi Corporation <br /> Boring Log: MWA 2D,R,S Date: 12/12/05 Logged by: Tyson Fulmer Well Specifications <br /> Location: Roberts No. 1, Roberts Island, Port of Stockton Elevation (feet msl; d, p, s) <br /> Drilling Co.: Spectrum Exploration GS: -1.76,-1.77,-2.03 TOC: 1.61, 1.87, 1.61 <br /> Driller: Sean Riley Depth to water:D: 16.32'P: 17.52';S: 18.63' <br /> Drilling Method: 8" hollow stem auger Total Well Depth: D: 17'; P:33';S: 50' <br /> Grout Materials and Method: Bentonite and Tremie grouted neat cement D: Lat.: 37.976828 Long.:-121.384743 <br /> Well Sand Type: 2/12 Monterrey sand P: Lat.: 37.976814 Long.: -121.384734 <br /> Completion: Finished 3'above grade in stainless monument S: Lat: 37.976796 Long.:-121.384729 <br /> Groundwater Sampling Method: No samples Screen Interval:D:8-3'; P: 18-13';S:25-30' <br /> Soil Sampling Method: 2'split spoon (P= push) PVC: SCH 40, 2" D, 0.010"slot size <br /> 0 Well Well Well <br /> m <br /> a Detail Detail Detail <br /> Z <br /> _ 3 m U no W-12D W-12R W-12S <br /> J <br /> W a W m S a Material Description Remarks <br /> 2.5y 5/6 light olive brown,fine grained sand, damp <br /> 1 1 <br /> 2 1 <br /> 4 <br /> 3 <br /> SM <br /> 4 <br /> 5 2 <br /> 6— <br /> 4 SC 1 gley 4/1 greenish grey with olive brown clayey fine <br /> grained sand, moist <br /> 7 ---------- <br /> 8- <br /> 9- <br /> 10- <br /> 11 <br /> 91011 SP <br /> 12 Grey,white, brown,well sorted coarse grain loose sand, <br /> wet <br /> 13- <br /> 14- <br /> 15- <br /> 8 <br /> 31415 8 <br /> 16 14 -' <br /> 24 1 gley 4/1 greenish grey very stiff silty clay, saturated <br /> 17- <br /> 18— <br /> 7 18 CL <br /> 19- <br /> 20- <br /> 4 <br /> 9 20 4 <br /> 21 5 <br /> 11 <br /> 22 <br /> 2 1 gley 4/1 greenish greymedium stiff sandy silt <br /> 23 2 <br /> 24 4 ML <br /> 25- <br /> 3 <br /> 26 8 1 gley 4/1 greenish grey medium dense fine grained <br /> 9 sand <br /> 27 <br /> 28 3 SP :.:•:'.. <br /> 4 <br /> 29 8 <br /> 30 <br />