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Project: ARCO Station # 548 Log of Monitoring Well: <br /> ovation: 1612 W.Hamer Ln.,Stockton,CA Project Number: 38466402 MW-8 <br /> aces Drilled: 12/2104 Total Depth: 100 feet Borehole Name: MW-8 <br /> filling Contractor: Cascade Drilling Well Construction Date: 1212104 Logged By: Matt Farris/Mike Hall <br /> hole Diameter: 8-inches Casing Diameter: 2-inches Casing Type: SCH 40 PVC Checked By: Vernon Elarth,R.G. <br /> ling Method: Hollow Stem Auger Screen Interv�- <br /> C <br /> l: 95-100 ft. Slot Size: 0.020-inch Sampling Method: CA Modified Split spoon <br /> omm Located in former UST pit between VW-I and MW-1 <br /> is C <br /> U 8 S <br /> LITHOLOGY DESCRIPTION WELL CONSTRUCTION <br /> Asphalt and aggregate base Flush mounted traffic rated 0 <br /> vault box. <br /> F11,silty sand,gravel and asphalt alt chunks. Well secured with locking <br /> pressure cap. <br /> 5 23 \\\\ Clayey Gravelly Fill,dark yellowish brown,low plasticity,up to 5 <br /> 20%pea g <br /> gravel,moist,medium dense. <br /> Near surface to 20 ft.new <br /> cement <br /> 10 31 _\'\\_\' Decrease in pea gravel,trace asphalt chunks, --10 <br /> 2-inch SCH 40 PVC <br /> 15 Sand Silt <br /> Sandy (ML). Olive brown,nonplastic,up to 1556 veryfine 15 <br /> grained sand,iron oxide staining,micaceous,moist,stiff. <br /> 20 29 <br /> Silty Sand(SM). Dark yellowish brown,very fine to fine 20 <br /> grained,up to 35%silt,moist,medium dense. <br /> 25 28 15-25%silt <br /> 25 <br /> 30 26 <br /> Sand(SP). Dark yellowish brown,poorly graded,very fine to 30 <br /> fine grained,[race silt,up to 10%black lithics,moist,medium <br /> An WJ:roundwater encountered at 31.5 ft. <br /> 35 28 77 <br /> Sandy Silt(ML). Olive brown,uonplastic,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 /> i <br /> 45 27 Sandy Clay(CL.). Gray green,low to medium plasticity up to <br /> 45 <br /> 25%very fine grained sand,heavy petroleum staining and <br /> strong odor,saturated,stiff. <br /> 50 <br /> 50 <br /> URS2879 Gateway Oaks Pr.,Ste 300 <br /> Ssc=ento,CA 95833 <br /> 916-679-21)00 <br />