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(r <br /> Project: Former ARCO Station # 548 Log of Monitoring Well: <br /> oration: 1612 W.flamer Ln.,Stockton,CA Project Number: 38465402 <br /> MW-7 <br /> till" <br /> Drilled: 1211104 Total Depth: 40 feet Borehole Name: MW-7 <br /> ng Contractor: Cascade Drilling Well Construction Date: 12/1/04 Logged By: Matt Farris <br /> hole Diameter: 8-inches Casing Diameter: 2-inches Casing Type: SCH 40 PVC Checked By: Vemon Elarth,R.G. <br /> filling Method: Hollow Stem AugerScreen Interval: 25-40 ft. Slot Size: 0.020-inch Sampling Method: CA Modified Split spoon <br /> Comments: Located in parking lane on E.side of Brentwood Dr. <br /> R � <br /> V <br /> O O <br /> v v 3 R <br /> o a <br /> C] ; to a <br /> LIT110LOGY DESCRIPTION WELL CONSTRUCTION <br /> 0 Flush mounted traffic rated 0 <br /> Asphalt and aggregate base <br /> vault box. <br /> \\\\ Fill,silty sand,gravel and asphalt chunks,dense. <br /> Well secured with locking <br /> pressure cap. <br /> 5 33 <br /> Near surface to 20 ft.neat <br /> cement <br /> 10 32 Sand(SP). light olive brown,poorly graded,very fine to fine 10 <br /> grain,trace silt,damp,dense. <br /> 2-inch SCH 40 PVC <br /> Silty Sand(SM). Dark yellowish brown,very fine to tine <br /> 1 r, 34 grained,30-40%silt,micaceous,moist,dense. 1 <br /> I <br /> 24 32 15-25%silt. 20 <br /> 20-23 ft.Bentonite Plug <br /> 25 27 Light olive brown 25 <br /> t 2-inch SCH 40 PVC,0.020- <br /> inch slot screen 25-40 ft. <br /> #3 filter pack sand 23-40 ft. <br /> 25 <br /> 30 Sand with gravel(SP). Dark gray,fine to coarse grain, 30 <br /> approximately 10%gravel up to 1.5cm.in diameter,rounded to <br /> well rounded,trace silt,saturated,medium dense. <br /> First groundwater encountered at 31.5 ft. <br /> 35 30 Sandy Silt(ML). yellowish brown,nonplastic,30'%fine gained 35 <br /> sand,moist,very stiff. <br /> Silt with Sand(ML). Light olive brown,slightly plastic,up to <br /> 40 30 20%very fine grained sand,moist,stiff. 40 <br /> 2870 Gateway Oaks Dr.,Ste 300 <br /> Sarna nto.CA 95633 <br /> XYM916-679-2000 <br />