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Project: ARCO Station # 548 Log of Monitoring Well: <br /> Location: 1612 W.Hamer Ln.,Stockton,CA Project Number: 38466402. Nj�7_g <br /> hates Drilled: 1 Z12J04 Tota]Depth-- 100 feet Borehole Name: MW-8 <br /> n&Contractor: Cascade Arilling Well Construction Date: 1212/04 Logged By: Matt Farris/Mike Hatt <br /> :. sole Diameter: &inches Casing Diameter. 2-iocbes Casing Type: SCH 40 PVC Checked By: Vernon Fhrth,R-G. <br /> Drilling Method.- 430llaw Stem Auger Screen Intmal: 95-100 ft. Slot Size: 0.020-inch Sampling Method: CA Modified Split spoon <br /> CnmaWOW Located informer UST pit between VW-1 and MW-1 <br /> A <br /> = bo <br /> ra t V$ 3 <br /> Z <br /> o a <br /> Q LrMOLOCY DESCRIPTION WELL CONSTRUCTION <br /> and aggregate base <br /> Arpbalt Flub mounted traffic rated p <br /> vault box. <br /> F0,silty sand,gravel and aspbalt chunks. <br /> Well secured with locking <br /> pressure cap. <br /> 5 7 N K\ Clayey Gravelly Fill,dark yellowish[mown.lowlastia <br /> p ry.up to 5 <br /> 20`b pea gravel,moist,medium dense. <br /> New surface to 20 ft.neat <br /> cement <br /> 1 Q 31 \ Decrease in pea gravel,trace asphalt chunks. 10 <br /> N\\ 2-inch SCIt 40 PVC <br /> \\\\ <br /> 1525Sandy Silt(ML). Olive brown,nonplastic,up to 11%very8oe 15 <br /> gained sand iron oxide staining,micaceous,moist,stiff, <br /> 2Q 29 Silty Sand(SM). Dark yellowish brown,very fine to fine 20 <br /> gained up to 35%silt,moist,medium dense. <br /> 25 28 15-25%silt 25 <br /> 30 26 <br /> Sand(SP). Dark yctlowisb brown,p—ly graded,very fine to 30 <br /> fine grained trace ails,up to 1096 black hthim moist,medium <br /> s iouadwater encountered at 31,5 ft. <br /> Sandy Silt¢vn-). Olive brown,nonplastic,pl up to 2096 very fine 35 <br /> grained sand,Petroleum staining and odor.wet,stiff. <br /> r <br /> 4Q 31 Strong petroleum odor and heavy staining,maisl to wet,deme. <br /> I' <br /> 45 LX 27 Sand Clay CL,. Gra <br /> Y Y( ) Y Jin,low to medium plasticity up to e15 <br /> 25%very fine grained sand,heavy petroleam staining and <br /> strong odor,saturated,stiff. <br /> 50 <br /> 2870 Gateway Oaks Dr.,Ste 300 <br /> -.sz .CA 95833 <br /> 916679-2000 <br /> 'a <br />