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Project: ARCO Station # 2168 Log of Extraction Well/Sparge Well:
<br /> Location: 441 West Charter Way,Stockton,CA Project dumber: 3 _
<br /> J 84b6562 EW-4/SP-4
<br /> Drilling Contractor: Woodward Drilling Drilling Method: Hollow Stem Auger Borehole Name: EW4/SP-4
<br /> Dates Drilled: 11/11/05 Well Construction Date: 11/11/05 Logged By: M.Hogaboom
<br /> Borehole Diameter: 10-inch Casing Diameter: EW-2-inch;SP-1-inch Type: SCH 80 PVC Checked By: Vern Elarlh,R.G.
<br /> . Total Depth Drilled: 37 feet Screen Interval: EW-15-25',SP-31-33' Slot Size: 0.020-inch Sampling Method: CA Modified Split Spoon
<br /> Comments:
<br /> R �
<br /> x Sample IID °" LITHOLOGY DESCRIPTION WELL CONSTRUCTION
<br /> 0
<br /> Silty Clay(CL). Yellowish brown,very still',medium to high EW well secured wish 0
<br /> plasticity,no odor,damp. pressure cap;SP well
<br /> a, secured with slip cap
<br /> ¢ U pending system
<br /> m installation
<br /> 5
<br /> 5
<br /> 21 Neat Cetnent
<br /> 2-10 ft
<br /> ( Clayey Silt(ML). Yellowish brown,hard,low plasticity,white
<br /> i
<br /> 10 mottling throughout,no odor,dry.
<br /> 1Q
<br /> 50/6 Bentonite Seal
<br /> 10.12 ft
<br /> •i'i:
<br /> 15—X
<br /> 26 15
<br /> Brown,very stiff,low plasticity,trace very fine grained sand,white
<br /> mottling throughout,no odor.
<br /> i EW-4
<br /> tM
<br /> 2-inch SCH 60 PVC,
<br /> 0.020-inch Slot
<br /> 2p Sandy Silt(ML).Brown,very stiff,no plasticity,25 very fine to fine i']•.i '
<br /> grained sand,minor clay,minor rust staining,minor white mottling,no ,; TeB°15-25 ft 20
<br /> 17 odor,damp. #3 Fitter Pack Sand
<br /> 12-26 ft
<br /> I
<br /> Clay(CL).Dark greenish gray(Gley 1QY 411), hard,mm ediu
<br /> ,!, :
<br /> Plasticity,trace sand,gray hydrocarbon-like staining,strong + J
<br /> i 25 hydrocarbon-like odor,damp. 25
<br /> 23 EW-4-25 1310
<br /> Bentonite Seal
<br /> 1 26-29 ft
<br /> i
<br /> 30 SP-4
<br /> 30
<br /> 1-inch SCH 80 PVC, 30
<br /> 0.020-inch Slot
<br /> Sandy Clay(CL). Grayish brown,hard,medium plasticity,20%very Screen 31-33 ft
<br /> fine to fine gained sand,white mottling,gray hydrocarbon-like #3 liter Pack Sand
<br /> staining,strong hydrocarbon-like odor,damp. 29-33.5 ft
<br /> Q
<br /> 35 Silty Sand(SM).Dark olive gray,70%very fine to fine grained sand, Bentonite Seal
<br /> tu
<br /> 8 trace clay,poorly graded sand interbeds,wet to sarated. 33.5-37 ft 35 t
<br /> 11 Increasing clay and silt.
<br /> 2870 Gateway Oaks Dr.,Ste 300
<br /> Sacramento,CA 95833
<br /> 916-679-2000
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