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Project: ARCO Station # 2168 Log of Extraction Well/Sparge Well: <br /> l Location: 441 West Charter Way,Stockton,CA Project Number: 38466562 EW-16/SP-16 <br /> _ Drilling Contractor: Woodward Drilling Drilling Methal: Hollow Stem Auger Borehole Name: EW-16/SP-16 <br /> Dates Drilled: 11/15/05 Well Construction Date: 11/15/05 Logged By: Scott Lookingbill,R.G. <br /> Borehole Diameter: 10-inch Casing Diameter: EW-2-inch;SP-1-inch Type: SCH 80 PVC Checked By: Vern Elarth,R.G. <br /> FTotal Depth Drilled: 39 feet Screen Interval: EW-15-25%SP-36-38' Slot Size: 0.020-inch Sampling Method: CA Modified Split Spoon <br /> 1 Comments: <br /> c-, titl <br /> US E~ S <br /> x Sample ID °" c7 LITIIOLOGY DESCRIPTION WELL CONSTRUCTION <br /> 0 EW well secured with 0 <br /> Silt(MI.). Yellowish brown,stiff,non plastic,no odor,dry to damp. <br /> pressure cap;SP well <br /> secured with slip cap <br /> U pending system <br /> installation <br /> 5 5 <br /> .:X 21 0.0 Neat Cement <br /> 2-10 ft <br /> Clayey Sill(ML). Light yellowish brown,hard,non-plastic,no odor, <br /> dry. <br />. ]0 10 <br /> 5016 0.0 Bentonite Seal <br /> ,., 10-E2 ft <br /> X. 15 <br /> 21 0.0 <br /> EW-16 <br /> 2-inch SCH 80 PVC, <br /> 0.020-inch Slot <br /> Screen 15-25 ft <br /> Becomes firm, i'i' ; —20 <br /> #3 Filter Pack Sand <br /> 13 EW-16-20 0.0 1020 3 Filter <br /> ft <br /> i <br /> Silty Clay(CL). Light gray,hard,low plasticity,slight hydrocarbon- <br /> 1 like odor,moist i!1! <br /> 25—X <br /> 25 <br /> 30 2.2 <br /> Clay(CL). Olive gray,very bard,high plasticity,moderate <br /> i <br /> hydrocarbon-like odor,moist. <br /> t <br /> 30—XBentoaf26-34 in <br /> ft Seal 30 <br /> 25 0.7 <br /> s <br /> i Silt(ML). Bluish gay,firm,low plasticity,clay interbeds,strong <br /> hydrocarbon-like odor,saturated. <br /> 35 SP-16 <br /> 12 1 5 1-inch SCH 80 PVC, 35 <br /> 22 0.020-inch Slot <br /> Screen 36-38 ft <br /> 14 #3 Filter Pack Sand <br /> 34-39 It <br /> 23 <br /> 2870 Gateway Oaks 1h.,Ste 300 <br /> Swrenenw,CA 95833 <br /> 91"79-2000 <br />