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Project: ARCO Station # 548 Log of Monitoring Well: <br /> Location: 1612 W.Hamer Ln.,Stockton,CA Project Number: 38466402 MW-8 <br /> Dates Drilled: 12!2!04 Total Depth: 100 feet Borehole Name: MW-8 <br /> Tilling Contractor: Cascade Drilling Well Construction Date: 12/2104 Logged By: Matt Farris/Mike Hall <br /> c <br /> Dhole Diameter: 8-inches Casing Diameter: 2-inches Casing Type: SCH 40 PVC Checked By: Vernon Elarth,R.G. <br /> rilling Method: Hollow Stem Auger Screen Interval: 95-100 ft. Slot Size: 0.020-inch Sampling Method: CA Modified Split spoon <br /> Continents: Located in former UST pit between VW-1 and MW-1 <br /> E a <br /> ao <br /> U $ a <br /> chi u w <br /> G o v R <br /> M <br /> LITHOLOGY DESCRIPTION WELL CONSTRUCTION <br /> 0 Asphalt and aggregate base Flush mounted traffic rated 0 <br /> Pvault box. <br /> Fill,silty sand,gravel and asphalt chunks. Well secured with locking <br /> \\ <br /> pressure cap. <br /> 5 23 \\\\ Clayey Gravelly Fill,dark yellowish brown,low plasticity,up to 5 <br /> 20%pea gravel,moist,medium dense. <br /> Near surface to 20 ft.neat <br /> cement <br /> 10__ 31 \_\'-\\ Decrease in pea gravel,trace asphalt chunks. 10 <br /> 2-inch SCH 40 PVC <br /> 15 �5 Sandy Silt(ML). Olive brown,nonplastic,up to 15%veryfine 15 <br /> grained sand,iron oxide staining,micaceous,moist,stiff. <br /> 20 29 Silty Sand(SM). Dark yellowish brown,very fine to tine 20 <br /> grained,up to 35%silt,moist,medium dense. <br /> 25 28 15-25%silt 25 <br /> 30 26 Sand(SP). Dark yellowish brown,poorly graded,very fine to 30 <br /> - fine grained,trace silt,up to 10%black lithics,moist,medium <br /> M&Wroundwater encountered at 31.5 ft. <br /> 35 28 Sandy Silt(ML). Olive brown,nonplastic,up to 20%very fine 35 <br /> grained sand,petroleum staining and odor,wet,stiff. <br /> 40 31 Strong petroleum odor and heavy staining,moist to wet,dense. 40 <br /> 45 27 Sandy Clay(CL). Gray green,low to medium plasticity up to 45 <br /> 25%very fine grained sand,heavy petroleum staining and <br /> strong odor,saturated,stiff. <br /> 50 50 <br /> 2870 Gateway Oaks Dr.,Ste 300 <br /> Sacramento,CA 95833 <br /> 916679-20W <br />